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-rw-r--r--kernel/fs/btrfs/async-thread.c60
-rw-r--r--kernel/fs/btrfs/async-thread.h4
-rw-r--r--kernel/fs/btrfs/backref.c120
-rw-r--r--kernel/fs/btrfs/check-integrity.c18
-rw-r--r--kernel/fs/btrfs/compression.c133
-rw-r--r--kernel/fs/btrfs/ctree.c30
-rw-r--r--kernel/fs/btrfs/ctree.h235
-rw-r--r--kernel/fs/btrfs/delayed-inode.c7
-rw-r--r--kernel/fs/btrfs/delayed-inode.h2
-rw-r--r--kernel/fs/btrfs/delayed-ref.c450
-rw-r--r--kernel/fs/btrfs/delayed-ref.h52
-rw-r--r--kernel/fs/btrfs/dev-replace.c55
-rw-r--r--kernel/fs/btrfs/disk-io.c411
-rw-r--r--kernel/fs/btrfs/disk-io.h3
-rw-r--r--kernel/fs/btrfs/export.c10
-rw-r--r--kernel/fs/btrfs/extent-tree.c1301
-rw-r--r--kernel/fs/btrfs/extent-tree.h0
-rw-r--r--kernel/fs/btrfs/extent_io.c324
-rw-r--r--kernel/fs/btrfs/extent_io.h19
-rw-r--r--kernel/fs/btrfs/file.c283
-rw-r--r--kernel/fs/btrfs/free-space-cache.c164
-rw-r--r--kernel/fs/btrfs/free-space-cache.h1
-rw-r--r--kernel/fs/btrfs/inode-item.c2
-rw-r--r--kernel/fs/btrfs/inode-map.c15
-rw-r--r--kernel/fs/btrfs/inode-map.h1
-rw-r--r--kernel/fs/btrfs/inode.c546
-rw-r--r--kernel/fs/btrfs/ioctl.c716
-rw-r--r--kernel/fs/btrfs/locking.c13
-rw-r--r--kernel/fs/btrfs/ordered-data.c86
-rw-r--r--kernel/fs/btrfs/ordered-data.h8
-rw-r--r--kernel/fs/btrfs/props.c13
-rw-r--r--kernel/fs/btrfs/qgroup.c1337
-rw-r--r--kernel/fs/btrfs/qgroup.h92
-rw-r--r--kernel/fs/btrfs/raid56.c155
-rw-r--r--kernel/fs/btrfs/raid56.h10
-rw-r--r--kernel/fs/btrfs/reada.c12
-rw-r--r--kernel/fs/btrfs/relocation.c80
-rw-r--r--kernel/fs/btrfs/root-tree.c21
-rw-r--r--kernel/fs/btrfs/scrub.c690
-rw-r--r--kernel/fs/btrfs/send.c377
-rw-r--r--kernel/fs/btrfs/super.c493
-rw-r--r--kernel/fs/btrfs/sysfs.c158
-rw-r--r--kernel/fs/btrfs/sysfs.h8
-rw-r--r--kernel/fs/btrfs/tests/free-space-tests.c24
-rw-r--r--kernel/fs/btrfs/tests/qgroup-tests.c109
-rw-r--r--kernel/fs/btrfs/transaction.c283
-rw-r--r--kernel/fs/btrfs/transaction.h56
-rw-r--r--kernel/fs/btrfs/tree-defrag.c6
-rw-r--r--kernel/fs/btrfs/tree-log.c586
-rw-r--r--kernel/fs/btrfs/ulist.c47
-rw-r--r--kernel/fs/btrfs/ulist.h1
-rw-r--r--kernel/fs/btrfs/volumes.c892
-rw-r--r--kernel/fs/btrfs/volumes.h36
-rw-r--r--kernel/fs/btrfs/xattr.c4
54 files changed, 6921 insertions, 3638 deletions
diff --git a/kernel/fs/btrfs/async-thread.c b/kernel/fs/btrfs/async-thread.c
index df9932b00..9aba42b78 100644
--- a/kernel/fs/btrfs/async-thread.c
+++ b/kernel/fs/btrfs/async-thread.c
@@ -42,8 +42,14 @@ struct __btrfs_workqueue {
/* Thresholding related variants */
atomic_t pending;
- int max_active;
- int current_max;
+
+ /* Up limit of concurrency workers */
+ int limit_active;
+
+ /* Current number of concurrency workers */
+ int current_active;
+
+ /* Threshold to change current_active */
int thresh;
unsigned int count;
spinlock_t thres_lock;
@@ -85,9 +91,10 @@ BTRFS_WORK_HELPER(extent_refs_helper);
BTRFS_WORK_HELPER(scrub_helper);
BTRFS_WORK_HELPER(scrubwrc_helper);
BTRFS_WORK_HELPER(scrubnc_helper);
+BTRFS_WORK_HELPER(scrubparity_helper);
static struct __btrfs_workqueue *
-__btrfs_alloc_workqueue(const char *name, unsigned int flags, int max_active,
+__btrfs_alloc_workqueue(const char *name, unsigned int flags, int limit_active,
int thresh)
{
struct __btrfs_workqueue *ret = kzalloc(sizeof(*ret), GFP_NOFS);
@@ -95,26 +102,31 @@ __btrfs_alloc_workqueue(const char *name, unsigned int flags, int max_active,
if (!ret)
return NULL;
- ret->max_active = max_active;
+ ret->limit_active = limit_active;
atomic_set(&ret->pending, 0);
if (thresh == 0)
thresh = DFT_THRESHOLD;
/* For low threshold, disabling threshold is a better choice */
if (thresh < DFT_THRESHOLD) {
- ret->current_max = max_active;
+ ret->current_active = limit_active;
ret->thresh = NO_THRESHOLD;
} else {
- ret->current_max = 1;
+ /*
+ * For threshold-able wq, let its concurrency grow on demand.
+ * Use minimal max_active at alloc time to reduce resource
+ * usage.
+ */
+ ret->current_active = 1;
ret->thresh = thresh;
}
if (flags & WQ_HIGHPRI)
ret->normal_wq = alloc_workqueue("%s-%s-high", flags,
- ret->max_active,
- "btrfs", name);
+ ret->current_active, "btrfs",
+ name);
else
ret->normal_wq = alloc_workqueue("%s-%s", flags,
- ret->max_active, "btrfs",
+ ret->current_active, "btrfs",
name);
if (!ret->normal_wq) {
kfree(ret);
@@ -133,7 +145,7 @@ __btrfs_destroy_workqueue(struct __btrfs_workqueue *wq);
struct btrfs_workqueue *btrfs_alloc_workqueue(const char *name,
unsigned int flags,
- int max_active,
+ int limit_active,
int thresh)
{
struct btrfs_workqueue *ret = kzalloc(sizeof(*ret), GFP_NOFS);
@@ -142,14 +154,14 @@ struct btrfs_workqueue *btrfs_alloc_workqueue(const char *name,
return NULL;
ret->normal = __btrfs_alloc_workqueue(name, flags & ~WQ_HIGHPRI,
- max_active, thresh);
+ limit_active, thresh);
if (!ret->normal) {
kfree(ret);
return NULL;
}
if (flags & WQ_HIGHPRI) {
- ret->high = __btrfs_alloc_workqueue(name, flags, max_active,
+ ret->high = __btrfs_alloc_workqueue(name, flags, limit_active,
thresh);
if (!ret->high) {
__btrfs_destroy_workqueue(ret->normal);
@@ -179,7 +191,7 @@ static inline void thresh_queue_hook(struct __btrfs_workqueue *wq)
*/
static inline void thresh_exec_hook(struct __btrfs_workqueue *wq)
{
- int new_max_active;
+ int new_current_active;
long pending;
int need_change = 0;
@@ -196,7 +208,7 @@ static inline void thresh_exec_hook(struct __btrfs_workqueue *wq)
wq->count %= (wq->thresh / 4);
if (!wq->count)
goto out;
- new_max_active = wq->current_max;
+ new_current_active = wq->current_active;
/*
* pending may be changed later, but it's OK since we really
@@ -204,19 +216,19 @@ static inline void thresh_exec_hook(struct __btrfs_workqueue *wq)
*/
pending = atomic_read(&wq->pending);
if (pending > wq->thresh)
- new_max_active++;
+ new_current_active++;
if (pending < wq->thresh / 2)
- new_max_active--;
- new_max_active = clamp_val(new_max_active, 1, wq->max_active);
- if (new_max_active != wq->current_max) {
+ new_current_active--;
+ new_current_active = clamp_val(new_current_active, 1, wq->limit_active);
+ if (new_current_active != wq->current_active) {
need_change = 1;
- wq->current_max = new_max_active;
+ wq->current_active = new_current_active;
}
out:
spin_unlock(&wq->thres_lock);
if (need_change) {
- workqueue_set_max_active(wq->normal_wq, wq->current_max);
+ workqueue_set_max_active(wq->normal_wq, wq->current_active);
}
}
@@ -316,8 +328,8 @@ static inline void __btrfs_queue_work(struct __btrfs_workqueue *wq,
list_add_tail(&work->ordered_list, &wq->ordered_list);
spin_unlock_irqrestore(&wq->list_lock, flags);
}
- queue_work(wq->normal_wq, &work->normal_work);
trace_btrfs_work_queued(work);
+ queue_work(wq->normal_wq, &work->normal_work);
}
void btrfs_queue_work(struct btrfs_workqueue *wq,
@@ -350,13 +362,13 @@ void btrfs_destroy_workqueue(struct btrfs_workqueue *wq)
kfree(wq);
}
-void btrfs_workqueue_set_max(struct btrfs_workqueue *wq, int max)
+void btrfs_workqueue_set_max(struct btrfs_workqueue *wq, int limit_active)
{
if (!wq)
return;
- wq->normal->max_active = max;
+ wq->normal->limit_active = limit_active;
if (wq->high)
- wq->high->max_active = max;
+ wq->high->limit_active = limit_active;
}
void btrfs_set_work_high_priority(struct btrfs_work *work)
diff --git a/kernel/fs/btrfs/async-thread.h b/kernel/fs/btrfs/async-thread.h
index ec2ee477f..ad4d0647d 100644
--- a/kernel/fs/btrfs/async-thread.h
+++ b/kernel/fs/btrfs/async-thread.h
@@ -64,10 +64,12 @@ BTRFS_WORK_HELPER_PROTO(extent_refs_helper);
BTRFS_WORK_HELPER_PROTO(scrub_helper);
BTRFS_WORK_HELPER_PROTO(scrubwrc_helper);
BTRFS_WORK_HELPER_PROTO(scrubnc_helper);
+BTRFS_WORK_HELPER_PROTO(scrubparity_helper);
+
struct btrfs_workqueue *btrfs_alloc_workqueue(const char *name,
unsigned int flags,
- int max_active,
+ int limit_active,
int thresh);
void btrfs_init_work(struct btrfs_work *work, btrfs_work_func_t helper,
btrfs_func_t func,
diff --git a/kernel/fs/btrfs/backref.c b/kernel/fs/btrfs/backref.c
index 614aaa196..e2f659dc5 100644
--- a/kernel/fs/btrfs/backref.c
+++ b/kernel/fs/btrfs/backref.c
@@ -206,10 +206,33 @@ static int __add_prelim_ref(struct list_head *head, u64 root_id,
return -ENOMEM;
ref->root_id = root_id;
- if (key)
+ if (key) {
ref->key_for_search = *key;
- else
+ /*
+ * We can often find data backrefs with an offset that is too
+ * large (>= LLONG_MAX, maximum allowed file offset) due to
+ * underflows when subtracting a file's offset with the data
+ * offset of its corresponding extent data item. This can
+ * happen for example in the clone ioctl.
+ * So if we detect such case we set the search key's offset to
+ * zero to make sure we will find the matching file extent item
+ * at add_all_parents(), otherwise we will miss it because the
+ * offset taken form the backref is much larger then the offset
+ * of the file extent item. This can make us scan a very large
+ * number of file extent items, but at least it will not make
+ * us miss any.
+ * This is an ugly workaround for a behaviour that should have
+ * never existed, but it does and a fix for the clone ioctl
+ * would touch a lot of places, cause backwards incompatibility
+ * and would not fix the problem for extents cloned with older
+ * kernels.
+ */
+ if (ref->key_for_search.type == BTRFS_EXTENT_DATA_KEY &&
+ ref->key_for_search.offset >= LLONG_MAX)
+ ref->key_for_search.offset = 0;
+ } else {
memset(&ref->key_for_search, 0, sizeof(ref->key_for_search));
+ }
ref->inode_list = NULL;
ref->level = level;
@@ -250,8 +273,12 @@ static int add_all_parents(struct btrfs_root *root, struct btrfs_path *path,
* the first item to check. But sometimes, we may enter it with
* slot==nritems. In that case, go to the next leaf before we continue.
*/
- if (path->slots[0] >= btrfs_header_nritems(path->nodes[0]))
- ret = btrfs_next_old_leaf(root, path, time_seq);
+ if (path->slots[0] >= btrfs_header_nritems(path->nodes[0])) {
+ if (time_seq == (u64)-1)
+ ret = btrfs_next_leaf(root, path);
+ else
+ ret = btrfs_next_old_leaf(root, path, time_seq);
+ }
while (!ret && count < total_refs) {
eb = path->nodes[0];
@@ -291,7 +318,10 @@ static int add_all_parents(struct btrfs_root *root, struct btrfs_path *path,
eie = NULL;
}
next:
- ret = btrfs_next_old_item(root, path, time_seq);
+ if (time_seq == (u64)-1)
+ ret = btrfs_next_item(root, path);
+ else
+ ret = btrfs_next_old_item(root, path, time_seq);
}
if (ret > 0)
@@ -325,15 +355,23 @@ static int __resolve_indirect_ref(struct btrfs_fs_info *fs_info,
index = srcu_read_lock(&fs_info->subvol_srcu);
- root = btrfs_read_fs_root_no_name(fs_info, &root_key);
+ root = btrfs_get_fs_root(fs_info, &root_key, false);
if (IS_ERR(root)) {
srcu_read_unlock(&fs_info->subvol_srcu, index);
ret = PTR_ERR(root);
goto out;
}
+ if (btrfs_test_is_dummy_root(root)) {
+ srcu_read_unlock(&fs_info->subvol_srcu, index);
+ ret = -ENOENT;
+ goto out;
+ }
+
if (path->search_commit_root)
root_level = btrfs_header_level(root->commit_root);
+ else if (time_seq == (u64)-1)
+ root_level = btrfs_header_level(root->node);
else
root_level = btrfs_old_root_level(root, time_seq);
@@ -343,7 +381,12 @@ static int __resolve_indirect_ref(struct btrfs_fs_info *fs_info,
}
path->lowest_level = level;
- ret = btrfs_search_old_slot(root, &ref->key_for_search, path, time_seq);
+ if (time_seq == (u64)-1)
+ ret = btrfs_search_slot(NULL, root, &ref->key_for_search, path,
+ 0, 0);
+ else
+ ret = btrfs_search_old_slot(root, &ref->key_for_search, path,
+ time_seq);
/* root node has been locked, we can release @subvol_srcu safely here */
srcu_read_unlock(&fs_info->subvol_srcu, index);
@@ -491,7 +534,9 @@ static int __add_missing_keys(struct btrfs_fs_info *fs_info,
BUG_ON(!ref->wanted_disk_byte);
eb = read_tree_block(fs_info->tree_root, ref->wanted_disk_byte,
0);
- if (!eb || !extent_buffer_uptodate(eb)) {
+ if (IS_ERR(eb)) {
+ return PTR_ERR(eb);
+ } else if (!extent_buffer_uptodate(eb)) {
free_extent_buffer(eb);
return -EIO;
}
@@ -507,7 +552,7 @@ static int __add_missing_keys(struct btrfs_fs_info *fs_info,
}
/*
- * merge two lists of backrefs and adjust counts accordingly
+ * merge backrefs and adjust counts accordingly
*
* mode = 1: merge identical keys, if key is set
* FIXME: if we add more keys in __add_prelim_ref, we can merge more here.
@@ -535,9 +580,9 @@ static void __merge_refs(struct list_head *head, int mode)
ref2 = list_entry(pos2, struct __prelim_ref, list);
+ if (!ref_for_same_block(ref1, ref2))
+ continue;
if (mode == 1) {
- if (!ref_for_same_block(ref1, ref2))
- continue;
if (!ref1->parent && ref2->parent) {
xchg = ref1;
ref1 = ref2;
@@ -572,8 +617,8 @@ static int __add_delayed_refs(struct btrfs_delayed_ref_head *head, u64 seq,
struct list_head *prefs, u64 *total_refs,
u64 inum)
{
+ struct btrfs_delayed_ref_node *node;
struct btrfs_delayed_extent_op *extent_op = head->extent_op;
- struct rb_node *n = &head->node.rb_node;
struct btrfs_key key;
struct btrfs_key op_key = {0};
int sgn;
@@ -583,12 +628,7 @@ static int __add_delayed_refs(struct btrfs_delayed_ref_head *head, u64 seq,
btrfs_disk_key_to_cpu(&op_key, &extent_op->key);
spin_lock(&head->lock);
- n = rb_first(&head->ref_root);
- while (n) {
- struct btrfs_delayed_ref_node *node;
- node = rb_entry(n, struct btrfs_delayed_ref_node,
- rb_node);
- n = rb_next(n);
+ list_for_each_entry(node, &head->ref_list, list) {
if (node->seq > seq)
continue;
@@ -621,7 +661,7 @@ static int __add_delayed_refs(struct btrfs_delayed_ref_head *head, u64 seq,
struct btrfs_delayed_tree_ref *ref;
ref = btrfs_delayed_node_to_tree_ref(node);
- ret = __add_prelim_ref(prefs, ref->root, NULL,
+ ret = __add_prelim_ref(prefs, 0, NULL,
ref->level + 1, ref->parent,
node->bytenr,
node->ref_mod * sgn, GFP_ATOMIC);
@@ -653,11 +693,7 @@ static int __add_delayed_refs(struct btrfs_delayed_ref_head *head, u64 seq,
struct btrfs_delayed_data_ref *ref;
ref = btrfs_delayed_node_to_data_ref(node);
-
- key.objectid = ref->objectid;
- key.type = BTRFS_EXTENT_DATA_KEY;
- key.offset = ref->offset;
- ret = __add_prelim_ref(prefs, ref->root, &key, 0,
+ ret = __add_prelim_ref(prefs, 0, NULL, 0,
ref->parent, node->bytenr,
node->ref_mod * sgn, GFP_ATOMIC);
break;
@@ -882,6 +918,11 @@ static int __add_keyed_refs(struct btrfs_fs_info *fs_info,
*
* NOTE: This can return values > 0
*
+ * If time_seq is set to (u64)-1, it will not search delayed_refs, and behave
+ * much like trans == NULL case, the difference only lies in it will not
+ * commit root.
+ * The special case is for qgroup to search roots in commit_transaction().
+ *
* FIXME some caching might speed things up
*/
static int find_parent_nodes(struct btrfs_trans_handle *trans,
@@ -920,6 +961,9 @@ static int find_parent_nodes(struct btrfs_trans_handle *trans,
path->skip_locking = 1;
}
+ if (time_seq == (u64)-1)
+ path->skip_locking = 1;
+
/*
* grab both a lock on the path and a lock on the delayed ref head.
* We need both to get a consistent picture of how the refs look
@@ -934,9 +978,10 @@ again:
BUG_ON(ret == 0);
#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
- if (trans && likely(trans->type != __TRANS_DUMMY)) {
+ if (trans && likely(trans->type != __TRANS_DUMMY) &&
+ time_seq != (u64)-1) {
#else
- if (trans) {
+ if (trans && time_seq != (u64)-1) {
#endif
/*
* look if there are updates for this ref queued and lock the
@@ -1034,7 +1079,10 @@ again:
eb = read_tree_block(fs_info->extent_root,
ref->parent, 0);
- if (!eb || !extent_buffer_uptodate(eb)) {
+ if (IS_ERR(eb)) {
+ ret = PTR_ERR(eb);
+ goto out;
+ } else if (!extent_buffer_uptodate(eb)) {
free_extent_buffer(eb);
ret = -EIO;
goto out;
@@ -1369,7 +1417,8 @@ char *btrfs_ref_to_path(struct btrfs_root *fs_root, struct btrfs_path *path,
read_extent_buffer(eb, dest + bytes_left,
name_off, name_len);
if (eb != eb_in) {
- btrfs_tree_read_unlock_blocking(eb);
+ if (!path->skip_locking)
+ btrfs_tree_read_unlock_blocking(eb);
free_extent_buffer(eb);
}
ret = btrfs_find_item(fs_root, path, parent, 0,
@@ -1389,9 +1438,10 @@ char *btrfs_ref_to_path(struct btrfs_root *fs_root, struct btrfs_path *path,
eb = path->nodes[0];
/* make sure we can use eb after releasing the path */
if (eb != eb_in) {
- atomic_inc(&eb->refs);
- btrfs_tree_read_lock(eb);
- btrfs_set_lock_blocking_rw(eb, BTRFS_READ_LOCK);
+ if (!path->skip_locking)
+ btrfs_set_lock_blocking_rw(eb, BTRFS_READ_LOCK);
+ path->nodes[0] = NULL;
+ path->locks[0] = 0;
}
btrfs_release_path(path);
iref = btrfs_item_ptr(eb, slot, struct btrfs_inode_ref);
@@ -1786,7 +1836,6 @@ static int iterate_inode_extrefs(u64 inum, struct btrfs_root *fs_root,
int found = 0;
struct extent_buffer *eb;
struct btrfs_inode_extref *extref;
- struct extent_buffer *leaf;
u32 item_size;
u32 cur_offset;
unsigned long ptr;
@@ -1814,9 +1863,8 @@ static int iterate_inode_extrefs(u64 inum, struct btrfs_root *fs_root,
btrfs_set_lock_blocking_rw(eb, BTRFS_READ_LOCK);
btrfs_release_path(path);
- leaf = path->nodes[0];
- item_size = btrfs_item_size_nr(leaf, slot);
- ptr = btrfs_item_ptr_offset(leaf, slot);
+ item_size = btrfs_item_size_nr(eb, slot);
+ ptr = btrfs_item_ptr_offset(eb, slot);
cur_offset = 0;
while (cur_offset < item_size) {
@@ -1830,7 +1878,7 @@ static int iterate_inode_extrefs(u64 inum, struct btrfs_root *fs_root,
if (ret)
break;
- cur_offset += btrfs_inode_extref_name_len(leaf, extref);
+ cur_offset += btrfs_inode_extref_name_len(eb, extref);
cur_offset += sizeof(*extref);
}
btrfs_tree_read_unlock_blocking(eb);
diff --git a/kernel/fs/btrfs/check-integrity.c b/kernel/fs/btrfs/check-integrity.c
index ce7dec88f..0340c57bf 100644
--- a/kernel/fs/btrfs/check-integrity.c
+++ b/kernel/fs/btrfs/check-integrity.c
@@ -343,7 +343,7 @@ static int btrfsic_process_written_superblock(
struct btrfsic_state *state,
struct btrfsic_block *const block,
struct btrfs_super_block *const super_hdr);
-static void btrfsic_bio_end_io(struct bio *bp, int bio_error_status);
+static void btrfsic_bio_end_io(struct bio *bp);
static void btrfsic_bh_end_io(struct buffer_head *bh, int uptodate);
static int btrfsic_is_block_ref_by_superblock(const struct btrfsic_state *state,
const struct btrfsic_block *block,
@@ -667,7 +667,7 @@ static int btrfsic_process_superblock(struct btrfsic_state *state,
selected_super = kzalloc(sizeof(*selected_super), GFP_NOFS);
if (NULL == selected_super) {
printk(KERN_INFO "btrfsic: error, kmalloc failed!\n");
- return -1;
+ return -ENOMEM;
}
list_for_each_entry(device, dev_head, dev_list) {
@@ -845,8 +845,8 @@ static int btrfsic_process_superblock_dev_mirror(
superblock_tmp->never_written = 0;
superblock_tmp->mirror_num = 1 + superblock_mirror_num;
if (state->print_mask & BTRFSIC_PRINT_MASK_SUPERBLOCK_WRITE)
- printk_in_rcu(KERN_INFO "New initial S-block (bdev %p, %s)"
- " @%llu (%s/%llu/%d)\n",
+ btrfs_info_in_rcu(device->dev_root->fs_info,
+ "new initial S-block (bdev %p, %s) @%llu (%s/%llu/%d)",
superblock_bdev,
rcu_str_deref(device->name), dev_bytenr,
dev_state->name, dev_bytenr,
@@ -1660,7 +1660,7 @@ static int btrfsic_read_block(struct btrfsic_state *state,
sizeof(*block_ctx->pagev)) *
num_pages, GFP_NOFS);
if (!block_ctx->mem_to_free)
- return -1;
+ return -ENOMEM;
block_ctx->datav = block_ctx->mem_to_free;
block_ctx->pagev = (struct page **)(block_ctx->datav + num_pages);
for (i = 0; i < num_pages; i++) {
@@ -2207,7 +2207,7 @@ continue_loop:
goto again;
}
-static void btrfsic_bio_end_io(struct bio *bp, int bio_error_status)
+static void btrfsic_bio_end_io(struct bio *bp)
{
struct btrfsic_block *block = (struct btrfsic_block *)bp->bi_private;
int iodone_w_error;
@@ -2215,7 +2215,7 @@ static void btrfsic_bio_end_io(struct bio *bp, int bio_error_status)
/* mutex is not held! This is not save if IO is not yet completed
* on umount */
iodone_w_error = 0;
- if (bio_error_status)
+ if (bp->bi_error)
iodone_w_error = 1;
BUG_ON(NULL == block);
@@ -2230,7 +2230,7 @@ static void btrfsic_bio_end_io(struct bio *bp, int bio_error_status)
BTRFSIC_PRINT_MASK_END_IO_BIO_BH))
printk(KERN_INFO
"bio_end_io(err=%d) for %c @%llu (%s/%llu/%d)\n",
- bio_error_status,
+ bp->bi_error,
btrfsic_get_block_type(dev_state->state, block),
block->logical_bytenr, dev_state->name,
block->dev_bytenr, block->mirror_num);
@@ -2252,7 +2252,7 @@ static void btrfsic_bio_end_io(struct bio *bp, int bio_error_status)
block = next_block;
} while (NULL != block);
- bp->bi_end_io(bp, bio_error_status);
+ bp->bi_end_io(bp);
}
static void btrfsic_bh_end_io(struct buffer_head *bh, int uptodate)
diff --git a/kernel/fs/btrfs/compression.c b/kernel/fs/btrfs/compression.c
index ce62324c7..c473c42d7 100644
--- a/kernel/fs/btrfs/compression.c
+++ b/kernel/fs/btrfs/compression.c
@@ -97,10 +97,7 @@ static inline int compressed_bio_size(struct btrfs_root *root,
static struct bio *compressed_bio_alloc(struct block_device *bdev,
u64 first_byte, gfp_t gfp_flags)
{
- int nr_vecs;
-
- nr_vecs = bio_get_nr_vecs(bdev);
- return btrfs_bio_alloc(bdev, first_byte >> 9, nr_vecs, gfp_flags);
+ return btrfs_bio_alloc(bdev, first_byte >> 9, BIO_MAX_PAGES, gfp_flags);
}
static int check_compressed_csum(struct inode *inode,
@@ -152,7 +149,7 @@ fail:
* The compressed pages are freed here, and it must be run
* in process context
*/
-static void end_compressed_bio_read(struct bio *bio, int err)
+static void end_compressed_bio_read(struct bio *bio)
{
struct compressed_bio *cb = bio->bi_private;
struct inode *inode;
@@ -160,7 +157,7 @@ static void end_compressed_bio_read(struct bio *bio, int err)
unsigned long index;
int ret;
- if (err)
+ if (bio->bi_error)
cb->errors = 1;
/* if there are more bios still pending for this compressed
@@ -210,7 +207,7 @@ csum_failed:
bio_for_each_segment_all(bvec, cb->orig_bio, i)
SetPageChecked(bvec->bv_page);
- bio_endio(cb->orig_bio, 0);
+ bio_endio(cb->orig_bio);
}
/* finally free the cb struct */
@@ -266,7 +263,7 @@ static noinline void end_compressed_writeback(struct inode *inode,
* This also calls the writeback end hooks for the file pages so that
* metadata and checksums can be updated in the file.
*/
-static void end_compressed_bio_write(struct bio *bio, int err)
+static void end_compressed_bio_write(struct bio *bio)
{
struct extent_io_tree *tree;
struct compressed_bio *cb = bio->bi_private;
@@ -274,7 +271,7 @@ static void end_compressed_bio_write(struct bio *bio, int err)
struct page *page;
unsigned long index;
- if (err)
+ if (bio->bi_error)
cb->errors = 1;
/* if there are more bios still pending for this compressed
@@ -293,7 +290,7 @@ static void end_compressed_bio_write(struct bio *bio, int err)
cb->start,
cb->start + cb->len - 1,
NULL,
- err ? 0 : 1);
+ bio->bi_error ? 0 : 1);
cb->compressed_pages[0]->mapping = NULL;
end_compressed_writeback(inode, cb);
@@ -485,13 +482,12 @@ static noinline int add_ra_bio_pages(struct inode *inode,
goto next;
}
- page = __page_cache_alloc(mapping_gfp_mask(mapping) &
- ~__GFP_FS);
+ page = __page_cache_alloc(mapping_gfp_constraint(mapping,
+ ~__GFP_FS));
if (!page)
break;
- if (add_to_page_cache_lru(page, mapping, pg_index,
- GFP_NOFS)) {
+ if (add_to_page_cache_lru(page, mapping, pg_index, GFP_NOFS)) {
page_cache_release(page);
goto next;
}
@@ -697,8 +693,10 @@ int btrfs_submit_compressed_read(struct inode *inode, struct bio *bio,
ret = btrfs_map_bio(root, READ, comp_bio,
mirror_num, 0);
- if (ret)
- bio_endio(comp_bio, ret);
+ if (ret) {
+ bio->bi_error = ret;
+ bio_endio(comp_bio);
+ }
bio_put(comp_bio);
@@ -724,8 +722,10 @@ int btrfs_submit_compressed_read(struct inode *inode, struct bio *bio,
}
ret = btrfs_map_bio(root, READ, comp_bio, mirror_num, 0);
- if (ret)
- bio_endio(comp_bio, ret);
+ if (ret) {
+ bio->bi_error = ret;
+ bio_endio(comp_bio);
+ }
bio_put(comp_bio);
return 0;
@@ -744,11 +744,13 @@ out:
return ret;
}
-static struct list_head comp_idle_workspace[BTRFS_COMPRESS_TYPES];
-static spinlock_t comp_workspace_lock[BTRFS_COMPRESS_TYPES];
-static int comp_num_workspace[BTRFS_COMPRESS_TYPES];
-static atomic_t comp_alloc_workspace[BTRFS_COMPRESS_TYPES];
-static wait_queue_head_t comp_workspace_wait[BTRFS_COMPRESS_TYPES];
+static struct {
+ struct list_head idle_ws;
+ spinlock_t ws_lock;
+ int num_ws;
+ atomic_t alloc_ws;
+ wait_queue_head_t ws_wait;
+} btrfs_comp_ws[BTRFS_COMPRESS_TYPES];
static const struct btrfs_compress_op * const btrfs_compress_op[] = {
&btrfs_zlib_compress,
@@ -760,10 +762,10 @@ void __init btrfs_init_compress(void)
int i;
for (i = 0; i < BTRFS_COMPRESS_TYPES; i++) {
- INIT_LIST_HEAD(&comp_idle_workspace[i]);
- spin_lock_init(&comp_workspace_lock[i]);
- atomic_set(&comp_alloc_workspace[i], 0);
- init_waitqueue_head(&comp_workspace_wait[i]);
+ INIT_LIST_HEAD(&btrfs_comp_ws[i].idle_ws);
+ spin_lock_init(&btrfs_comp_ws[i].ws_lock);
+ atomic_set(&btrfs_comp_ws[i].alloc_ws, 0);
+ init_waitqueue_head(&btrfs_comp_ws[i].ws_wait);
}
}
@@ -777,38 +779,38 @@ static struct list_head *find_workspace(int type)
int cpus = num_online_cpus();
int idx = type - 1;
- struct list_head *idle_workspace = &comp_idle_workspace[idx];
- spinlock_t *workspace_lock = &comp_workspace_lock[idx];
- atomic_t *alloc_workspace = &comp_alloc_workspace[idx];
- wait_queue_head_t *workspace_wait = &comp_workspace_wait[idx];
- int *num_workspace = &comp_num_workspace[idx];
+ struct list_head *idle_ws = &btrfs_comp_ws[idx].idle_ws;
+ spinlock_t *ws_lock = &btrfs_comp_ws[idx].ws_lock;
+ atomic_t *alloc_ws = &btrfs_comp_ws[idx].alloc_ws;
+ wait_queue_head_t *ws_wait = &btrfs_comp_ws[idx].ws_wait;
+ int *num_ws = &btrfs_comp_ws[idx].num_ws;
again:
- spin_lock(workspace_lock);
- if (!list_empty(idle_workspace)) {
- workspace = idle_workspace->next;
+ spin_lock(ws_lock);
+ if (!list_empty(idle_ws)) {
+ workspace = idle_ws->next;
list_del(workspace);
- (*num_workspace)--;
- spin_unlock(workspace_lock);
+ (*num_ws)--;
+ spin_unlock(ws_lock);
return workspace;
}
- if (atomic_read(alloc_workspace) > cpus) {
+ if (atomic_read(alloc_ws) > cpus) {
DEFINE_WAIT(wait);
- spin_unlock(workspace_lock);
- prepare_to_wait(workspace_wait, &wait, TASK_UNINTERRUPTIBLE);
- if (atomic_read(alloc_workspace) > cpus && !*num_workspace)
+ spin_unlock(ws_lock);
+ prepare_to_wait(ws_wait, &wait, TASK_UNINTERRUPTIBLE);
+ if (atomic_read(alloc_ws) > cpus && !*num_ws)
schedule();
- finish_wait(workspace_wait, &wait);
+ finish_wait(ws_wait, &wait);
goto again;
}
- atomic_inc(alloc_workspace);
- spin_unlock(workspace_lock);
+ atomic_inc(alloc_ws);
+ spin_unlock(ws_lock);
workspace = btrfs_compress_op[idx]->alloc_workspace();
if (IS_ERR(workspace)) {
- atomic_dec(alloc_workspace);
- wake_up(workspace_wait);
+ atomic_dec(alloc_ws);
+ wake_up(ws_wait);
}
return workspace;
}
@@ -820,27 +822,30 @@ again:
static void free_workspace(int type, struct list_head *workspace)
{
int idx = type - 1;
- struct list_head *idle_workspace = &comp_idle_workspace[idx];
- spinlock_t *workspace_lock = &comp_workspace_lock[idx];
- atomic_t *alloc_workspace = &comp_alloc_workspace[idx];
- wait_queue_head_t *workspace_wait = &comp_workspace_wait[idx];
- int *num_workspace = &comp_num_workspace[idx];
-
- spin_lock(workspace_lock);
- if (*num_workspace < num_online_cpus()) {
- list_add(workspace, idle_workspace);
- (*num_workspace)++;
- spin_unlock(workspace_lock);
+ struct list_head *idle_ws = &btrfs_comp_ws[idx].idle_ws;
+ spinlock_t *ws_lock = &btrfs_comp_ws[idx].ws_lock;
+ atomic_t *alloc_ws = &btrfs_comp_ws[idx].alloc_ws;
+ wait_queue_head_t *ws_wait = &btrfs_comp_ws[idx].ws_wait;
+ int *num_ws = &btrfs_comp_ws[idx].num_ws;
+
+ spin_lock(ws_lock);
+ if (*num_ws < num_online_cpus()) {
+ list_add(workspace, idle_ws);
+ (*num_ws)++;
+ spin_unlock(ws_lock);
goto wake;
}
- spin_unlock(workspace_lock);
+ spin_unlock(ws_lock);
btrfs_compress_op[idx]->free_workspace(workspace);
- atomic_dec(alloc_workspace);
+ atomic_dec(alloc_ws);
wake:
+ /*
+ * Make sure counter is updated before we wake up waiters.
+ */
smp_mb();
- if (waitqueue_active(workspace_wait))
- wake_up(workspace_wait);
+ if (waitqueue_active(ws_wait))
+ wake_up(ws_wait);
}
/*
@@ -852,11 +857,11 @@ static void free_workspaces(void)
int i;
for (i = 0; i < BTRFS_COMPRESS_TYPES; i++) {
- while (!list_empty(&comp_idle_workspace[i])) {
- workspace = comp_idle_workspace[i].next;
+ while (!list_empty(&btrfs_comp_ws[i].idle_ws)) {
+ workspace = btrfs_comp_ws[i].idle_ws.next;
list_del(workspace);
btrfs_compress_op[i]->free_workspace(workspace);
- atomic_dec(&comp_alloc_workspace[i]);
+ atomic_dec(&btrfs_comp_ws[i].alloc_ws);
}
}
}
diff --git a/kernel/fs/btrfs/ctree.c b/kernel/fs/btrfs/ctree.c
index 0f11ebc92..5b8e235c4 100644
--- a/kernel/fs/btrfs/ctree.c
+++ b/kernel/fs/btrfs/ctree.c
@@ -1011,7 +1011,7 @@ static noinline int update_ref_for_cow(struct btrfs_trans_handle *trans,
return ret;
if (refs == 0) {
ret = -EROFS;
- btrfs_std_error(root->fs_info, ret);
+ btrfs_std_error(root->fs_info, ret, NULL);
return ret;
}
} else {
@@ -1159,8 +1159,10 @@ static noinline int __btrfs_cow_block(struct btrfs_trans_handle *trans,
if (test_bit(BTRFS_ROOT_REF_COWS, &root->state)) {
ret = btrfs_reloc_cow_block(trans, root, buf, cow);
- if (ret)
+ if (ret) {
+ btrfs_abort_transaction(trans, root, ret);
return ret;
+ }
}
if (buf == root->node) {
@@ -1439,8 +1441,9 @@ get_old_root(struct btrfs_root *root, u64 time_seq)
btrfs_tree_read_unlock(eb_root);
free_extent_buffer(eb_root);
old = read_tree_block(root, logical, 0);
- if (WARN_ON(!old || !extent_buffer_uptodate(old))) {
- free_extent_buffer(old);
+ if (WARN_ON(IS_ERR(old) || !extent_buffer_uptodate(old))) {
+ if (!IS_ERR(old))
+ free_extent_buffer(old);
btrfs_warn(root->fs_info,
"failed to read tree block %llu from get_old_root", logical);
} else {
@@ -1685,7 +1688,9 @@ int btrfs_realloc_node(struct btrfs_trans_handle *trans,
if (!cur || !uptodate) {
if (!cur) {
cur = read_tree_block(root, blocknr, gen);
- if (!cur || !extent_buffer_uptodate(cur)) {
+ if (IS_ERR(cur)) {
+ return PTR_ERR(cur);
+ } else if (!extent_buffer_uptodate(cur)) {
free_extent_buffer(cur);
return -EIO;
}
@@ -1864,8 +1869,9 @@ static noinline struct extent_buffer *read_node_slot(struct btrfs_root *root,
eb = read_tree_block(root, btrfs_node_blockptr(parent, slot),
btrfs_node_ptr_generation(parent, slot));
- if (eb && !extent_buffer_uptodate(eb)) {
- free_extent_buffer(eb);
+ if (IS_ERR(eb) || !extent_buffer_uptodate(eb)) {
+ if (!IS_ERR(eb))
+ free_extent_buffer(eb);
eb = NULL;
}
@@ -1921,7 +1927,7 @@ static noinline int balance_level(struct btrfs_trans_handle *trans,
child = read_node_slot(root, mid, 0);
if (!child) {
ret = -EROFS;
- btrfs_std_error(root->fs_info, ret);
+ btrfs_std_error(root->fs_info, ret, NULL);
goto enospc;
}
@@ -2024,7 +2030,7 @@ static noinline int balance_level(struct btrfs_trans_handle *trans,
*/
if (!left) {
ret = -EROFS;
- btrfs_std_error(root->fs_info, ret);
+ btrfs_std_error(root->fs_info, ret, NULL);
goto enospc;
}
wret = balance_node_right(trans, root, mid, left);
@@ -2494,7 +2500,7 @@ read_block_for_search(struct btrfs_trans_handle *trans,
ret = -EAGAIN;
tmp = read_tree_block(root, blocknr, 0);
- if (tmp) {
+ if (!IS_ERR(tmp)) {
/*
* If the read above didn't mark this buffer up to date,
* it will never end up being up to date. Set ret to EIO now
@@ -4934,8 +4940,8 @@ int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
{
struct extent_buffer *leaf;
struct btrfs_item *item;
- int last_off;
- int dsize = 0;
+ u32 last_off;
+ u32 dsize = 0;
int ret = 0;
int wret;
int i;
diff --git a/kernel/fs/btrfs/ctree.h b/kernel/fs/btrfs/ctree.h
index 6f364e1d8..385b449fd 100644
--- a/kernel/fs/btrfs/ctree.h
+++ b/kernel/fs/btrfs/ctree.h
@@ -174,7 +174,7 @@ struct btrfs_ordered_sum;
/* csum types */
#define BTRFS_CSUM_TYPE_CRC32 0
-static int btrfs_csum_sizes[] = { 4, 0 };
+static int btrfs_csum_sizes[] = { 4 };
/* four bytes for CRC32 */
#define BTRFS_EMPTY_DIR_SIZE 0
@@ -823,8 +823,18 @@ struct btrfs_disk_balance_args {
*/
__le64 profiles;
- /* usage filter */
- __le64 usage;
+ /*
+ * usage filter
+ * BTRFS_BALANCE_ARGS_USAGE with a single value means '0..N'
+ * BTRFS_BALANCE_ARGS_USAGE_RANGE - range syntax, min..max
+ */
+ union {
+ __le64 usage;
+ struct {
+ __le32 usage_min;
+ __le32 usage_max;
+ };
+ };
/* devid filter */
__le64 devid;
@@ -846,10 +856,27 @@ struct btrfs_disk_balance_args {
/* BTRFS_BALANCE_ARGS_* */
__le64 flags;
- /* BTRFS_BALANCE_ARGS_LIMIT value */
- __le64 limit;
+ /*
+ * BTRFS_BALANCE_ARGS_LIMIT with value 'limit'
+ * BTRFS_BALANCE_ARGS_LIMIT_RANGE - the extend version can use minimum
+ * and maximum
+ */
+ union {
+ __le64 limit;
+ struct {
+ __le32 limit_min;
+ __le32 limit_max;
+ };
+ };
+
+ /*
+ * Process chunks that cross stripes_min..stripes_max devices,
+ * BTRFS_BALANCE_ARGS_STRIPES_RANGE
+ */
+ __le32 stripes_min;
+ __le32 stripes_max;
- __le64 unused[7];
+ __le64 unused[6];
} __attribute__ ((__packed__));
/*
@@ -1154,6 +1181,10 @@ struct btrfs_space_info {
delalloc/allocations */
u64 bytes_readonly; /* total bytes that are read only */
+ u64 max_extent_size; /* This will hold the maximum extent size of
+ the space info if we had an ENOSPC in the
+ allocator. */
+
unsigned int full:1; /* indicates that we cannot allocate any more
chunks for this space */
unsigned int chunk_alloc:1; /* set if we are allocating a chunk */
@@ -1228,6 +1259,9 @@ struct btrfs_free_cluster {
/* first extent starting offset */
u64 window_start;
+ /* We did a full search and couldn't create a cluster */
+ bool fragmented;
+
struct btrfs_block_group_cache *block_group;
/*
* when a cluster is allocated from a block group, we put the
@@ -1300,7 +1334,7 @@ struct btrfs_block_group_cache {
/* for raid56, this is a full stripe, without parity */
unsigned long full_stripe_len;
- unsigned int ro:1;
+ unsigned int ro;
unsigned int iref:1;
unsigned int has_caching_ctl:1;
unsigned int removed:1;
@@ -1518,12 +1552,6 @@ struct btrfs_fs_info {
*/
struct mutex ordered_operations_mutex;
- /*
- * Same as ordered_operations_mutex except this is for ordered extents
- * and not the operations.
- */
- struct mutex ordered_extent_flush_mutex;
-
struct rw_semaphore commit_root_sem;
struct rw_semaphore cleanup_work_sem;
@@ -1544,7 +1572,7 @@ struct btrfs_fs_info {
spinlock_t delayed_iput_lock;
struct list_head delayed_iputs;
- struct rw_semaphore delayed_iput_sem;
+ struct mutex cleaner_delayed_iput_mutex;
/* this protects tree_mod_seq_list */
spinlock_t tree_mod_seq_lock;
@@ -1619,10 +1647,7 @@ struct btrfs_fs_info {
struct task_struct *cleaner_kthread;
int thread_pool_size;
- struct kobject super_kobj;
struct kobject *space_info_kobj;
- struct kobject *device_dir_kobj;
- struct completion kobj_unregister;
int do_barriers;
int closing;
int log_root_recovering;
@@ -1698,6 +1723,7 @@ struct btrfs_fs_info {
struct btrfs_workqueue *scrub_workers;
struct btrfs_workqueue *scrub_wr_completion_workers;
struct btrfs_workqueue *scrub_nocow_workers;
+ struct btrfs_workqueue *scrub_parity_workers;
#ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
u32 check_integrity_print_mask;
@@ -1735,7 +1761,7 @@ struct btrfs_fs_info {
/* list of dirty qgroups to be written at next commit */
struct list_head dirty_qgroups;
- /* used by btrfs_qgroup_record_ref for an efficient tree traversal */
+ /* used by qgroup for an efficient tree traversal */
u64 qgroup_seq;
/* qgroup rescan items */
@@ -1780,6 +1806,7 @@ struct btrfs_fs_info {
spinlock_t unused_bgs_lock;
struct list_head unused_bgs;
struct mutex unused_bg_unpin_mutex;
+ struct mutex delete_unused_bgs_mutex;
/* For btrfs to record security options */
struct security_mnt_opts security_opts;
@@ -1950,6 +1977,9 @@ struct btrfs_root {
int send_in_progress;
struct btrfs_subvolume_writers *subv_writers;
atomic_t will_be_snapshoted;
+
+ /* For qgroup metadata space reserve */
+ atomic_t qgroup_meta_rsv;
};
struct btrfs_ioctl_defrag_range_args {
@@ -2152,6 +2182,8 @@ struct btrfs_ioctl_defrag_range_args {
#define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
#define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
#define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23)
+#define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24)
+#define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25)
#define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
#define BTRFS_DEFAULT_MAX_INLINE (8192)
@@ -2176,6 +2208,18 @@ struct btrfs_ioctl_defrag_range_args {
btrfs_clear_opt(root->fs_info->mount_opt, opt); \
}
+#ifdef CONFIG_BTRFS_DEBUG
+static inline int
+btrfs_should_fragment_free_space(struct btrfs_root *root,
+ struct btrfs_block_group_cache *block_group)
+{
+ return (btrfs_test_opt(root, FRAGMENT_METADATA) &&
+ block_group->flags & BTRFS_BLOCK_GROUP_METADATA) ||
+ (btrfs_test_opt(root, FRAGMENT_DATA) &&
+ block_group->flags & BTRFS_BLOCK_GROUP_DATA);
+}
+#endif
+
/*
* Requests for changes that need to be done during transaction commit.
*
@@ -3323,7 +3367,7 @@ static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info)
static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
{
- return mapping_gfp_mask(mapping) & ~__GFP_FS;
+ return mapping_gfp_constraint(mapping, ~__GFP_FS);
}
/* extent-tree.c */
@@ -3372,6 +3416,7 @@ int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
struct btrfs_block_group_cache *btrfs_lookup_block_group(
struct btrfs_fs_info *info,
u64 bytenr);
+void btrfs_get_block_group(struct btrfs_block_group_cache *cache);
void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
int get_block_group_index(struct btrfs_block_group_cache *cache);
struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans,
@@ -3386,7 +3431,8 @@ void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
u64 root_objectid, u64 owner,
- u64 offset, struct btrfs_key *ins);
+ u64 offset, u64 ram_bytes,
+ struct btrfs_key *ins);
int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
u64 root_objectid, u64 owner, u64 offset,
@@ -3405,7 +3451,7 @@ int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
int btrfs_free_extent(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid,
- u64 owner, u64 offset, int no_quota);
+ u64 owner, u64 offset);
int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len,
int delalloc);
@@ -3418,7 +3464,7 @@ int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
u64 bytenr, u64 num_bytes, u64 parent,
- u64 root_objectid, u64 owner, u64 offset, int no_quota);
+ u64 root_objectid, u64 owner, u64 offset);
int btrfs_start_dirty_block_groups(struct btrfs_trans_handle *trans,
struct btrfs_root *root);
@@ -3434,10 +3480,15 @@ int btrfs_make_block_group(struct btrfs_trans_handle *trans,
struct btrfs_root *root, u64 bytes_used,
u64 type, u64 chunk_objectid, u64 chunk_offset,
u64 size);
+struct btrfs_trans_handle *btrfs_start_trans_remove_block_group(
+ struct btrfs_fs_info *fs_info,
+ const u64 chunk_offset);
int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
struct btrfs_root *root, u64 group_start,
struct extent_map *em);
void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info);
+void btrfs_get_block_group_trimming(struct btrfs_block_group_cache *cache);
+void btrfs_put_block_group_trimming(struct btrfs_block_group_cache *cache);
void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans,
struct btrfs_root *root);
u64 btrfs_get_alloc_profile(struct btrfs_root *root, int data);
@@ -3454,10 +3505,14 @@ enum btrfs_reserve_flush_enum {
BTRFS_RESERVE_FLUSH_ALL,
};
-int btrfs_check_data_free_space(struct inode *inode, u64 bytes, u64 write_bytes);
-void btrfs_free_reserved_data_space(struct inode *inode, u64 bytes);
+int btrfs_check_data_free_space(struct inode *inode, u64 start, u64 len);
+int btrfs_alloc_data_chunk_ondemand(struct inode *inode, u64 bytes);
+void btrfs_free_reserved_data_space(struct inode *inode, u64 start, u64 len);
+void btrfs_free_reserved_data_space_noquota(struct inode *inode, u64 start,
+ u64 len);
void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans,
struct btrfs_root *root);
+void btrfs_trans_release_chunk_metadata(struct btrfs_trans_handle *trans);
int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans,
struct inode *inode);
void btrfs_orphan_release_metadata(struct inode *inode);
@@ -3470,8 +3525,8 @@ void btrfs_subvolume_release_metadata(struct btrfs_root *root,
u64 qgroup_reserved);
int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes);
void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes);
-int btrfs_delalloc_reserve_space(struct inode *inode, u64 num_bytes);
-void btrfs_delalloc_release_space(struct inode *inode, u64 num_bytes);
+int btrfs_delalloc_reserve_space(struct inode *inode, u64 start, u64 len);
+void btrfs_delalloc_release_space(struct inode *inode, u64 start, u64 len);
void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type);
struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root,
unsigned short type);
@@ -3495,9 +3550,9 @@ int btrfs_cond_migrate_bytes(struct btrfs_fs_info *fs_info,
void btrfs_block_rsv_release(struct btrfs_root *root,
struct btrfs_block_rsv *block_rsv,
u64 num_bytes);
-int btrfs_set_block_group_ro(struct btrfs_root *root,
+int btrfs_inc_block_group_ro(struct btrfs_root *root,
struct btrfs_block_group_cache *cache);
-void btrfs_set_block_group_rw(struct btrfs_root *root,
+void btrfs_dec_block_group_ro(struct btrfs_root *root,
struct btrfs_block_group_cache *cache);
void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
@@ -3515,6 +3570,9 @@ int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
int __get_raid_index(u64 flags);
int btrfs_start_write_no_snapshoting(struct btrfs_root *root);
void btrfs_end_write_no_snapshoting(struct btrfs_root *root);
+void check_system_chunk(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root,
+ const u64 type);
/* ctree.c */
int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key,
int level, int *slot);
@@ -4005,8 +4063,8 @@ int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
/* sysfs.c */
int btrfs_init_sysfs(void);
void btrfs_exit_sysfs(void);
-int btrfs_sysfs_add_one(struct btrfs_fs_info *fs_info);
-void btrfs_sysfs_remove_one(struct btrfs_fs_info *fs_info);
+int btrfs_sysfs_add_mounted(struct btrfs_fs_info *fs_info);
+void btrfs_sysfs_remove_mounted(struct btrfs_fs_info *fs_info);
/* xattr.c */
ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
@@ -4040,16 +4098,105 @@ void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
#define btrfs_info(fs_info, fmt, args...) \
btrfs_printk(fs_info, KERN_INFO fmt, ##args)
+/*
+ * Wrappers that use printk_in_rcu
+ */
+#define btrfs_emerg_in_rcu(fs_info, fmt, args...) \
+ btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args)
+#define btrfs_alert_in_rcu(fs_info, fmt, args...) \
+ btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args)
+#define btrfs_crit_in_rcu(fs_info, fmt, args...) \
+ btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args)
+#define btrfs_err_in_rcu(fs_info, fmt, args...) \
+ btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args)
+#define btrfs_warn_in_rcu(fs_info, fmt, args...) \
+ btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args)
+#define btrfs_notice_in_rcu(fs_info, fmt, args...) \
+ btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
+#define btrfs_info_in_rcu(fs_info, fmt, args...) \
+ btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args)
+
+/*
+ * Wrappers that use a ratelimited printk_in_rcu
+ */
+#define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \
+ btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args)
+#define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \
+ btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args)
+#define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \
+ btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args)
+#define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \
+ btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args)
+#define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \
+ btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args)
+#define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \
+ btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
+#define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \
+ btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args)
+
+/*
+ * Wrappers that use a ratelimited printk
+ */
+#define btrfs_emerg_rl(fs_info, fmt, args...) \
+ btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args)
+#define btrfs_alert_rl(fs_info, fmt, args...) \
+ btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args)
+#define btrfs_crit_rl(fs_info, fmt, args...) \
+ btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args)
+#define btrfs_err_rl(fs_info, fmt, args...) \
+ btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args)
+#define btrfs_warn_rl(fs_info, fmt, args...) \
+ btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args)
+#define btrfs_notice_rl(fs_info, fmt, args...) \
+ btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args)
+#define btrfs_info_rl(fs_info, fmt, args...) \
+ btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args)
#ifdef DEBUG
#define btrfs_debug(fs_info, fmt, args...) \
btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
+#define btrfs_debug_in_rcu(fs_info, fmt, args...) \
+ btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
+#define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
+ btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
+#define btrfs_debug_rl(fs_info, fmt, args...) \
+ btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args)
#else
#define btrfs_debug(fs_info, fmt, args...) \
no_printk(KERN_DEBUG fmt, ##args)
+#define btrfs_debug_in_rcu(fs_info, fmt, args...) \
+ no_printk(KERN_DEBUG fmt, ##args)
+#define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
+ no_printk(KERN_DEBUG fmt, ##args)
+#define btrfs_debug_rl(fs_info, fmt, args...) \
+ no_printk(KERN_DEBUG fmt, ##args)
#endif
+#define btrfs_printk_in_rcu(fs_info, fmt, args...) \
+do { \
+ rcu_read_lock(); \
+ btrfs_printk(fs_info, fmt, ##args); \
+ rcu_read_unlock(); \
+} while (0)
+
+#define btrfs_printk_ratelimited(fs_info, fmt, args...) \
+do { \
+ static DEFINE_RATELIMIT_STATE(_rs, \
+ DEFAULT_RATELIMIT_INTERVAL, \
+ DEFAULT_RATELIMIT_BURST); \
+ if (__ratelimit(&_rs)) \
+ btrfs_printk(fs_info, fmt, ##args); \
+} while (0)
+
+#define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \
+do { \
+ rcu_read_lock(); \
+ btrfs_printk_ratelimited(fs_info, fmt, ##args); \
+ rcu_read_unlock(); \
+} while (0)
+
#ifdef CONFIG_BTRFS_ASSERT
+__cold
static inline void assfail(char *expr, char *file, int line)
{
pr_err("BTRFS: assertion failed: %s, file: %s, line: %d",
@@ -4065,10 +4212,13 @@ static inline void assfail(char *expr, char *file, int line)
#define btrfs_assert()
__printf(5, 6)
+__cold
void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function,
unsigned int line, int errno, const char *fmt, ...);
+const char *btrfs_decode_error(int errno);
+__cold
void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
struct btrfs_root *root, const char *function,
unsigned int line, int errno);
@@ -4111,27 +4261,27 @@ static inline int __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
* Call btrfs_abort_transaction as early as possible when an error condition is
* detected, that way the exact line number is reported.
*/
-
#define btrfs_abort_transaction(trans, root, errno) \
do { \
- __btrfs_abort_transaction(trans, root, __func__, \
- __LINE__, errno); \
-} while (0)
-
-#define btrfs_std_error(fs_info, errno) \
-do { \
- if ((errno)) \
- __btrfs_std_error((fs_info), __func__, \
- __LINE__, (errno), NULL); \
+ /* Report first abort since mount */ \
+ if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \
+ &((root)->fs_info->fs_state))) { \
+ WARN(1, KERN_DEBUG \
+ "BTRFS: Transaction aborted (error %d)\n", \
+ (errno)); \
+ } \
+ __btrfs_abort_transaction((trans), (root), __func__, \
+ __LINE__, (errno)); \
} while (0)
-#define btrfs_error(fs_info, errno, fmt, args...) \
+#define btrfs_std_error(fs_info, errno, fmt, args...) \
do { \
__btrfs_std_error((fs_info), __func__, __LINE__, \
(errno), fmt, ##args); \
} while (0)
__printf(5, 6)
+__cold
void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
unsigned int line, int errno, const char *fmt, ...);
@@ -4172,8 +4322,7 @@ int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
struct btrfs_root *root, struct extent_buffer *buf,
struct extent_buffer *cow);
-void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle *trans,
- struct btrfs_pending_snapshot *pending,
+void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending,
u64 *bytes_to_reserve);
int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
struct btrfs_pending_snapshot *pending);
diff --git a/kernel/fs/btrfs/delayed-inode.c b/kernel/fs/btrfs/delayed-inode.c
index a2ae42720..02b934d0e 100644
--- a/kernel/fs/btrfs/delayed-inode.c
+++ b/kernel/fs/btrfs/delayed-inode.c
@@ -463,6 +463,10 @@ static int __btrfs_add_delayed_deletion_item(struct btrfs_delayed_node *node,
static void finish_one_item(struct btrfs_delayed_root *delayed_root)
{
int seq = atomic_inc_return(&delayed_root->items_seq);
+
+ /*
+ * atomic_dec_return implies a barrier for waitqueue_active
+ */
if ((atomic_dec_return(&delayed_root->items) <
BTRFS_DELAYED_BACKGROUND || seq % BTRFS_DELAYED_BATCH == 0) &&
waitqueue_active(&delayed_root->wait))
@@ -1690,7 +1694,7 @@ int btrfs_should_delete_dir_index(struct list_head *del_list,
*
*/
int btrfs_readdir_delayed_dir_index(struct dir_context *ctx,
- struct list_head *ins_list)
+ struct list_head *ins_list, bool *emitted)
{
struct btrfs_dir_item *di;
struct btrfs_delayed_item *curr, *next;
@@ -1734,6 +1738,7 @@ int btrfs_readdir_delayed_dir_index(struct dir_context *ctx,
if (over)
return 1;
+ *emitted = true;
}
return 0;
}
diff --git a/kernel/fs/btrfs/delayed-inode.h b/kernel/fs/btrfs/delayed-inode.h
index f70119f25..0167853c8 100644
--- a/kernel/fs/btrfs/delayed-inode.h
+++ b/kernel/fs/btrfs/delayed-inode.h
@@ -144,7 +144,7 @@ void btrfs_put_delayed_items(struct list_head *ins_list,
int btrfs_should_delete_dir_index(struct list_head *del_list,
u64 index);
int btrfs_readdir_delayed_dir_index(struct dir_context *ctx,
- struct list_head *ins_list);
+ struct list_head *ins_list, bool *emitted);
/* for init */
int __init btrfs_delayed_inode_init(void);
diff --git a/kernel/fs/btrfs/delayed-ref.c b/kernel/fs/btrfs/delayed-ref.c
index 8f8ed7d20..e06dd75ad 100644
--- a/kernel/fs/btrfs/delayed-ref.c
+++ b/kernel/fs/btrfs/delayed-ref.c
@@ -22,6 +22,7 @@
#include "ctree.h"
#include "delayed-ref.h"
#include "transaction.h"
+#include "qgroup.h"
struct kmem_cache *btrfs_delayed_ref_head_cachep;
struct kmem_cache *btrfs_delayed_tree_ref_cachep;
@@ -84,87 +85,6 @@ static int comp_data_refs(struct btrfs_delayed_data_ref *ref2,
return 0;
}
-/*
- * entries in the rb tree are ordered by the byte number of the extent,
- * type of the delayed backrefs and content of delayed backrefs.
- */
-static int comp_entry(struct btrfs_delayed_ref_node *ref2,
- struct btrfs_delayed_ref_node *ref1,
- bool compare_seq)
-{
- if (ref1->bytenr < ref2->bytenr)
- return -1;
- if (ref1->bytenr > ref2->bytenr)
- return 1;
- if (ref1->is_head && ref2->is_head)
- return 0;
- if (ref2->is_head)
- return -1;
- if (ref1->is_head)
- return 1;
- if (ref1->type < ref2->type)
- return -1;
- if (ref1->type > ref2->type)
- return 1;
- if (ref1->no_quota > ref2->no_quota)
- return 1;
- if (ref1->no_quota < ref2->no_quota)
- return -1;
- /* merging of sequenced refs is not allowed */
- if (compare_seq) {
- if (ref1->seq < ref2->seq)
- return -1;
- if (ref1->seq > ref2->seq)
- return 1;
- }
- if (ref1->type == BTRFS_TREE_BLOCK_REF_KEY ||
- ref1->type == BTRFS_SHARED_BLOCK_REF_KEY) {
- return comp_tree_refs(btrfs_delayed_node_to_tree_ref(ref2),
- btrfs_delayed_node_to_tree_ref(ref1),
- ref1->type);
- } else if (ref1->type == BTRFS_EXTENT_DATA_REF_KEY ||
- ref1->type == BTRFS_SHARED_DATA_REF_KEY) {
- return comp_data_refs(btrfs_delayed_node_to_data_ref(ref2),
- btrfs_delayed_node_to_data_ref(ref1));
- }
- BUG();
- return 0;
-}
-
-/*
- * insert a new ref into the rbtree. This returns any existing refs
- * for the same (bytenr,parent) tuple, or NULL if the new node was properly
- * inserted.
- */
-static struct btrfs_delayed_ref_node *tree_insert(struct rb_root *root,
- struct rb_node *node)
-{
- struct rb_node **p = &root->rb_node;
- struct rb_node *parent_node = NULL;
- struct btrfs_delayed_ref_node *entry;
- struct btrfs_delayed_ref_node *ins;
- int cmp;
-
- ins = rb_entry(node, struct btrfs_delayed_ref_node, rb_node);
- while (*p) {
- parent_node = *p;
- entry = rb_entry(parent_node, struct btrfs_delayed_ref_node,
- rb_node);
-
- cmp = comp_entry(entry, ins, 1);
- if (cmp < 0)
- p = &(*p)->rb_left;
- else if (cmp > 0)
- p = &(*p)->rb_right;
- else
- return entry;
- }
-
- rb_link_node(node, parent_node, p);
- rb_insert_color(node, root);
- return NULL;
-}
-
/* insert a new ref to head ref rbtree */
static struct btrfs_delayed_ref_head *htree_insert(struct rb_root *root,
struct rb_node *node)
@@ -268,7 +188,7 @@ static inline void drop_delayed_ref(struct btrfs_trans_handle *trans,
rb_erase(&head->href_node, &delayed_refs->href_root);
} else {
assert_spin_locked(&head->lock);
- rb_erase(&ref->rb_node, &head->ref_root);
+ list_del(&ref->list);
}
ref->in_tree = 0;
btrfs_put_delayed_ref(ref);
@@ -277,36 +197,50 @@ static inline void drop_delayed_ref(struct btrfs_trans_handle *trans,
trans->delayed_ref_updates--;
}
-static int merge_ref(struct btrfs_trans_handle *trans,
- struct btrfs_delayed_ref_root *delayed_refs,
- struct btrfs_delayed_ref_head *head,
- struct btrfs_delayed_ref_node *ref, u64 seq)
+static bool merge_ref(struct btrfs_trans_handle *trans,
+ struct btrfs_delayed_ref_root *delayed_refs,
+ struct btrfs_delayed_ref_head *head,
+ struct btrfs_delayed_ref_node *ref,
+ u64 seq)
{
- struct rb_node *node;
- int mod = 0;
- int done = 0;
+ struct btrfs_delayed_ref_node *next;
+ bool done = false;
+
+ next = list_first_entry(&head->ref_list, struct btrfs_delayed_ref_node,
+ list);
+ while (!done && &next->list != &head->ref_list) {
+ int mod;
+ struct btrfs_delayed_ref_node *next2;
- node = rb_next(&ref->rb_node);
- while (!done && node) {
- struct btrfs_delayed_ref_node *next;
+ next2 = list_next_entry(next, list);
+
+ if (next == ref)
+ goto next;
- next = rb_entry(node, struct btrfs_delayed_ref_node, rb_node);
- node = rb_next(node);
if (seq && next->seq >= seq)
- break;
- if (comp_entry(ref, next, 0))
- continue;
+ goto next;
+
+ if (next->type != ref->type)
+ goto next;
+
+ if ((ref->type == BTRFS_TREE_BLOCK_REF_KEY ||
+ ref->type == BTRFS_SHARED_BLOCK_REF_KEY) &&
+ comp_tree_refs(btrfs_delayed_node_to_tree_ref(ref),
+ btrfs_delayed_node_to_tree_ref(next),
+ ref->type))
+ goto next;
+ if ((ref->type == BTRFS_EXTENT_DATA_REF_KEY ||
+ ref->type == BTRFS_SHARED_DATA_REF_KEY) &&
+ comp_data_refs(btrfs_delayed_node_to_data_ref(ref),
+ btrfs_delayed_node_to_data_ref(next)))
+ goto next;
if (ref->action == next->action) {
mod = next->ref_mod;
} else {
if (ref->ref_mod < next->ref_mod) {
- struct btrfs_delayed_ref_node *tmp;
-
- tmp = ref;
- ref = next;
- next = tmp;
- done = 1;
+ swap(ref, next);
+ done = true;
}
mod = -next->ref_mod;
}
@@ -315,16 +249,18 @@ static int merge_ref(struct btrfs_trans_handle *trans,
ref->ref_mod += mod;
if (ref->ref_mod == 0) {
drop_delayed_ref(trans, delayed_refs, head, ref);
- done = 1;
+ done = true;
} else {
/*
- * You can't have multiples of the same ref on a tree
- * block.
+ * Can't have multiples of the same ref on a tree block.
*/
WARN_ON(ref->type == BTRFS_TREE_BLOCK_REF_KEY ||
ref->type == BTRFS_SHARED_BLOCK_REF_KEY);
}
+next:
+ next = next2;
}
+
return done;
}
@@ -333,14 +269,15 @@ void btrfs_merge_delayed_refs(struct btrfs_trans_handle *trans,
struct btrfs_delayed_ref_root *delayed_refs,
struct btrfs_delayed_ref_head *head)
{
- struct rb_node *node;
+ struct btrfs_delayed_ref_node *ref;
u64 seq = 0;
assert_spin_locked(&head->lock);
- /*
- * We don't have too much refs to merge in the case of delayed data
- * refs.
- */
+
+ if (list_empty(&head->ref_list))
+ return;
+
+ /* We don't have too many refs to merge for data. */
if (head->is_data)
return;
@@ -354,19 +291,22 @@ void btrfs_merge_delayed_refs(struct btrfs_trans_handle *trans,
}
spin_unlock(&fs_info->tree_mod_seq_lock);
- node = rb_first(&head->ref_root);
- while (node) {
- struct btrfs_delayed_ref_node *ref;
-
- ref = rb_entry(node, struct btrfs_delayed_ref_node,
- rb_node);
- /* We can't merge refs that are outside of our seq count */
+ ref = list_first_entry(&head->ref_list, struct btrfs_delayed_ref_node,
+ list);
+ while (&ref->list != &head->ref_list) {
if (seq && ref->seq >= seq)
- break;
- if (merge_ref(trans, delayed_refs, head, ref, seq))
- node = rb_first(&head->ref_root);
- else
- node = rb_next(&ref->rb_node);
+ goto next;
+
+ if (merge_ref(trans, delayed_refs, head, ref, seq)) {
+ if (list_empty(&head->ref_list))
+ break;
+ ref = list_first_entry(&head->ref_list,
+ struct btrfs_delayed_ref_node,
+ list);
+ continue;
+ }
+next:
+ ref = list_next_entry(ref, list);
}
}
@@ -443,45 +383,70 @@ again:
}
/*
- * helper function to update an extent delayed ref in the
- * rbtree. existing and update must both have the same
- * bytenr and parent
+ * Helper to insert the ref_node to the tail or merge with tail.
*
- * This may free existing if the update cancels out whatever
- * operation it was doing.
+ * Return 0 for insert.
+ * Return >0 for merge.
*/
-static noinline void
-update_existing_ref(struct btrfs_trans_handle *trans,
- struct btrfs_delayed_ref_root *delayed_refs,
- struct btrfs_delayed_ref_head *head,
- struct btrfs_delayed_ref_node *existing,
- struct btrfs_delayed_ref_node *update)
+static int
+add_delayed_ref_tail_merge(struct btrfs_trans_handle *trans,
+ struct btrfs_delayed_ref_root *root,
+ struct btrfs_delayed_ref_head *href,
+ struct btrfs_delayed_ref_node *ref)
{
- if (update->action != existing->action) {
- /*
- * this is effectively undoing either an add or a
- * drop. We decrement the ref_mod, and if it goes
- * down to zero we just delete the entry without
- * every changing the extent allocation tree.
- */
- existing->ref_mod--;
- if (existing->ref_mod == 0)
- drop_delayed_ref(trans, delayed_refs, head, existing);
- else
- WARN_ON(existing->type == BTRFS_TREE_BLOCK_REF_KEY ||
- existing->type == BTRFS_SHARED_BLOCK_REF_KEY);
+ struct btrfs_delayed_ref_node *exist;
+ int mod;
+ int ret = 0;
+
+ spin_lock(&href->lock);
+ /* Check whether we can merge the tail node with ref */
+ if (list_empty(&href->ref_list))
+ goto add_tail;
+ exist = list_entry(href->ref_list.prev, struct btrfs_delayed_ref_node,
+ list);
+ /* No need to compare bytenr nor is_head */
+ if (exist->type != ref->type || exist->seq != ref->seq)
+ goto add_tail;
+
+ if ((exist->type == BTRFS_TREE_BLOCK_REF_KEY ||
+ exist->type == BTRFS_SHARED_BLOCK_REF_KEY) &&
+ comp_tree_refs(btrfs_delayed_node_to_tree_ref(exist),
+ btrfs_delayed_node_to_tree_ref(ref),
+ ref->type))
+ goto add_tail;
+ if ((exist->type == BTRFS_EXTENT_DATA_REF_KEY ||
+ exist->type == BTRFS_SHARED_DATA_REF_KEY) &&
+ comp_data_refs(btrfs_delayed_node_to_data_ref(exist),
+ btrfs_delayed_node_to_data_ref(ref)))
+ goto add_tail;
+
+ /* Now we are sure we can merge */
+ ret = 1;
+ if (exist->action == ref->action) {
+ mod = ref->ref_mod;
} else {
- WARN_ON(existing->type == BTRFS_TREE_BLOCK_REF_KEY ||
- existing->type == BTRFS_SHARED_BLOCK_REF_KEY);
- /*
- * the action on the existing ref matches
- * the action on the ref we're trying to add.
- * Bump the ref_mod by one so the backref that
- * is eventually added/removed has the correct
- * reference count
- */
- existing->ref_mod += update->ref_mod;
+ /* Need to change action */
+ if (exist->ref_mod < ref->ref_mod) {
+ exist->action = ref->action;
+ mod = -exist->ref_mod;
+ exist->ref_mod = ref->ref_mod;
+ } else
+ mod = -ref->ref_mod;
}
+ exist->ref_mod += mod;
+
+ /* remove existing tail if its ref_mod is zero */
+ if (exist->ref_mod == 0)
+ drop_delayed_ref(trans, root, href, exist);
+ spin_unlock(&href->lock);
+ return ret;
+
+add_tail:
+ list_add_tail(&ref->list, &href->ref_list);
+ atomic_inc(&root->num_entries);
+ trans->delayed_ref_updates++;
+ spin_unlock(&href->lock);
+ return ret;
}
/*
@@ -568,15 +533,21 @@ update_existing_head_ref(struct btrfs_delayed_ref_root *delayed_refs,
static noinline struct btrfs_delayed_ref_head *
add_delayed_ref_head(struct btrfs_fs_info *fs_info,
struct btrfs_trans_handle *trans,
- struct btrfs_delayed_ref_node *ref, u64 bytenr,
- u64 num_bytes, int action, int is_data)
+ struct btrfs_delayed_ref_node *ref,
+ struct btrfs_qgroup_extent_record *qrecord,
+ u64 bytenr, u64 num_bytes, u64 ref_root, u64 reserved,
+ int action, int is_data)
{
struct btrfs_delayed_ref_head *existing;
struct btrfs_delayed_ref_head *head_ref = NULL;
struct btrfs_delayed_ref_root *delayed_refs;
+ struct btrfs_qgroup_extent_record *qexisting;
int count_mod = 1;
int must_insert_reserved = 0;
+ /* If reserved is provided, it must be a data extent. */
+ BUG_ON(!is_data && reserved);
+
/*
* the head node stores the sum of all the mods, so dropping a ref
* should drop the sum in the head node by one.
@@ -618,9 +589,28 @@ add_delayed_ref_head(struct btrfs_fs_info *fs_info,
head_ref = btrfs_delayed_node_to_head(ref);
head_ref->must_insert_reserved = must_insert_reserved;
head_ref->is_data = is_data;
- head_ref->ref_root = RB_ROOT;
+ INIT_LIST_HEAD(&head_ref->ref_list);
head_ref->processing = 0;
head_ref->total_ref_mod = count_mod;
+ head_ref->qgroup_reserved = 0;
+ head_ref->qgroup_ref_root = 0;
+
+ /* Record qgroup extent info if provided */
+ if (qrecord) {
+ if (ref_root && reserved) {
+ head_ref->qgroup_ref_root = ref_root;
+ head_ref->qgroup_reserved = reserved;
+ }
+
+ qrecord->bytenr = bytenr;
+ qrecord->num_bytes = num_bytes;
+ qrecord->old_roots = NULL;
+
+ qexisting = btrfs_qgroup_insert_dirty_extent(delayed_refs,
+ qrecord);
+ if (qexisting)
+ kfree(qrecord);
+ }
spin_lock_init(&head_ref->lock);
mutex_init(&head_ref->mutex);
@@ -630,6 +620,8 @@ add_delayed_ref_head(struct btrfs_fs_info *fs_info,
existing = htree_insert(&delayed_refs->href_root,
&head_ref->href_node);
if (existing) {
+ WARN_ON(ref_root && reserved && existing->qgroup_ref_root
+ && existing->qgroup_reserved);
update_existing_head_ref(delayed_refs, &existing->node, ref);
/*
* we've updated the existing ref, free the newly
@@ -657,12 +649,12 @@ add_delayed_tree_ref(struct btrfs_fs_info *fs_info,
struct btrfs_delayed_ref_head *head_ref,
struct btrfs_delayed_ref_node *ref, u64 bytenr,
u64 num_bytes, u64 parent, u64 ref_root, int level,
- int action, int no_quota)
+ int action)
{
- struct btrfs_delayed_ref_node *existing;
struct btrfs_delayed_tree_ref *full_ref;
struct btrfs_delayed_ref_root *delayed_refs;
u64 seq = 0;
+ int ret;
if (action == BTRFS_ADD_DELAYED_EXTENT)
action = BTRFS_ADD_DELAYED_REF;
@@ -679,7 +671,6 @@ add_delayed_tree_ref(struct btrfs_fs_info *fs_info,
ref->action = action;
ref->is_head = 0;
ref->in_tree = 1;
- ref->no_quota = no_quota;
ref->seq = seq;
full_ref = btrfs_delayed_node_to_tree_ref(ref);
@@ -693,21 +684,14 @@ add_delayed_tree_ref(struct btrfs_fs_info *fs_info,
trace_add_delayed_tree_ref(ref, full_ref, action);
- spin_lock(&head_ref->lock);
- existing = tree_insert(&head_ref->ref_root, &ref->rb_node);
- if (existing) {
- update_existing_ref(trans, delayed_refs, head_ref, existing,
- ref);
- /*
- * we've updated the existing ref, free the newly
- * allocated ref
- */
+ ret = add_delayed_ref_tail_merge(trans, delayed_refs, head_ref, ref);
+
+ /*
+ * XXX: memory should be freed at the same level allocated.
+ * But bad practice is anywhere... Follow it now. Need cleanup.
+ */
+ if (ret > 0)
kmem_cache_free(btrfs_delayed_tree_ref_cachep, full_ref);
- } else {
- atomic_inc(&delayed_refs->num_entries);
- trans->delayed_ref_updates++;
- }
- spin_unlock(&head_ref->lock);
}
/*
@@ -719,12 +703,12 @@ add_delayed_data_ref(struct btrfs_fs_info *fs_info,
struct btrfs_delayed_ref_head *head_ref,
struct btrfs_delayed_ref_node *ref, u64 bytenr,
u64 num_bytes, u64 parent, u64 ref_root, u64 owner,
- u64 offset, int action, int no_quota)
+ u64 offset, int action)
{
- struct btrfs_delayed_ref_node *existing;
struct btrfs_delayed_data_ref *full_ref;
struct btrfs_delayed_ref_root *delayed_refs;
u64 seq = 0;
+ int ret;
if (action == BTRFS_ADD_DELAYED_EXTENT)
action = BTRFS_ADD_DELAYED_REF;
@@ -742,7 +726,6 @@ add_delayed_data_ref(struct btrfs_fs_info *fs_info,
ref->action = action;
ref->is_head = 0;
ref->in_tree = 1;
- ref->no_quota = no_quota;
ref->seq = seq;
full_ref = btrfs_delayed_node_to_data_ref(ref);
@@ -758,21 +741,10 @@ add_delayed_data_ref(struct btrfs_fs_info *fs_info,
trace_add_delayed_data_ref(ref, full_ref, action);
- spin_lock(&head_ref->lock);
- existing = tree_insert(&head_ref->ref_root, &ref->rb_node);
- if (existing) {
- update_existing_ref(trans, delayed_refs, head_ref, existing,
- ref);
- /*
- * we've updated the existing ref, free the newly
- * allocated ref
- */
+ ret = add_delayed_ref_tail_merge(trans, delayed_refs, head_ref, ref);
+
+ if (ret > 0)
kmem_cache_free(btrfs_delayed_data_ref_cachep, full_ref);
- } else {
- atomic_inc(&delayed_refs->num_entries);
- trans->delayed_ref_updates++;
- }
- spin_unlock(&head_ref->lock);
}
/*
@@ -784,15 +756,12 @@ int btrfs_add_delayed_tree_ref(struct btrfs_fs_info *fs_info,
struct btrfs_trans_handle *trans,
u64 bytenr, u64 num_bytes, u64 parent,
u64 ref_root, int level, int action,
- struct btrfs_delayed_extent_op *extent_op,
- int no_quota)
+ struct btrfs_delayed_extent_op *extent_op)
{
struct btrfs_delayed_tree_ref *ref;
struct btrfs_delayed_ref_head *head_ref;
struct btrfs_delayed_ref_root *delayed_refs;
-
- if (!is_fstree(ref_root) || !fs_info->quota_enabled)
- no_quota = 0;
+ struct btrfs_qgroup_extent_record *record = NULL;
BUG_ON(extent_op && extent_op->is_data);
ref = kmem_cache_alloc(btrfs_delayed_tree_ref_cachep, GFP_NOFS);
@@ -800,9 +769,13 @@ int btrfs_add_delayed_tree_ref(struct btrfs_fs_info *fs_info,
return -ENOMEM;
head_ref = kmem_cache_alloc(btrfs_delayed_ref_head_cachep, GFP_NOFS);
- if (!head_ref) {
- kmem_cache_free(btrfs_delayed_tree_ref_cachep, ref);
- return -ENOMEM;
+ if (!head_ref)
+ goto free_ref;
+
+ if (fs_info->quota_enabled && is_fstree(ref_root)) {
+ record = kmalloc(sizeof(*record), GFP_NOFS);
+ if (!record)
+ goto free_head_ref;
}
head_ref->extent_op = extent_op;
@@ -814,15 +787,21 @@ int btrfs_add_delayed_tree_ref(struct btrfs_fs_info *fs_info,
* insert both the head node and the new ref without dropping
* the spin lock
*/
- head_ref = add_delayed_ref_head(fs_info, trans, &head_ref->node,
- bytenr, num_bytes, action, 0);
+ head_ref = add_delayed_ref_head(fs_info, trans, &head_ref->node, record,
+ bytenr, num_bytes, 0, 0, action, 0);
add_delayed_tree_ref(fs_info, trans, head_ref, &ref->node, bytenr,
- num_bytes, parent, ref_root, level, action,
- no_quota);
+ num_bytes, parent, ref_root, level, action);
spin_unlock(&delayed_refs->lock);
return 0;
+
+free_head_ref:
+ kmem_cache_free(btrfs_delayed_ref_head_cachep, head_ref);
+free_ref:
+ kmem_cache_free(btrfs_delayed_tree_ref_cachep, ref);
+
+ return -ENOMEM;
}
/*
@@ -832,16 +811,13 @@ int btrfs_add_delayed_data_ref(struct btrfs_fs_info *fs_info,
struct btrfs_trans_handle *trans,
u64 bytenr, u64 num_bytes,
u64 parent, u64 ref_root,
- u64 owner, u64 offset, int action,
- struct btrfs_delayed_extent_op *extent_op,
- int no_quota)
+ u64 owner, u64 offset, u64 reserved, int action,
+ struct btrfs_delayed_extent_op *extent_op)
{
struct btrfs_delayed_data_ref *ref;
struct btrfs_delayed_ref_head *head_ref;
struct btrfs_delayed_ref_root *delayed_refs;
-
- if (!is_fstree(ref_root) || !fs_info->quota_enabled)
- no_quota = 0;
+ struct btrfs_qgroup_extent_record *record = NULL;
BUG_ON(extent_op && !extent_op->is_data);
ref = kmem_cache_alloc(btrfs_delayed_data_ref_cachep, GFP_NOFS);
@@ -854,6 +830,16 @@ int btrfs_add_delayed_data_ref(struct btrfs_fs_info *fs_info,
return -ENOMEM;
}
+ if (fs_info->quota_enabled && is_fstree(ref_root)) {
+ record = kmalloc(sizeof(*record), GFP_NOFS);
+ if (!record) {
+ kmem_cache_free(btrfs_delayed_data_ref_cachep, ref);
+ kmem_cache_free(btrfs_delayed_ref_head_cachep,
+ head_ref);
+ return -ENOMEM;
+ }
+ }
+
head_ref->extent_op = extent_op;
delayed_refs = &trans->transaction->delayed_refs;
@@ -863,17 +849,45 @@ int btrfs_add_delayed_data_ref(struct btrfs_fs_info *fs_info,
* insert both the head node and the new ref without dropping
* the spin lock
*/
- head_ref = add_delayed_ref_head(fs_info, trans, &head_ref->node,
- bytenr, num_bytes, action, 1);
+ head_ref = add_delayed_ref_head(fs_info, trans, &head_ref->node, record,
+ bytenr, num_bytes, ref_root, reserved,
+ action, 1);
add_delayed_data_ref(fs_info, trans, head_ref, &ref->node, bytenr,
num_bytes, parent, ref_root, owner, offset,
- action, no_quota);
+ action);
spin_unlock(&delayed_refs->lock);
return 0;
}
+int btrfs_add_delayed_qgroup_reserve(struct btrfs_fs_info *fs_info,
+ struct btrfs_trans_handle *trans,
+ u64 ref_root, u64 bytenr, u64 num_bytes)
+{
+ struct btrfs_delayed_ref_root *delayed_refs;
+ struct btrfs_delayed_ref_head *ref_head;
+ int ret = 0;
+
+ if (!fs_info->quota_enabled || !is_fstree(ref_root))
+ return 0;
+
+ delayed_refs = &trans->transaction->delayed_refs;
+
+ spin_lock(&delayed_refs->lock);
+ ref_head = find_ref_head(&delayed_refs->href_root, bytenr, 0);
+ if (!ref_head) {
+ ret = -ENOENT;
+ goto out;
+ }
+ WARN_ON(ref_head->qgroup_reserved || ref_head->qgroup_ref_root);
+ ref_head->qgroup_ref_root = ref_root;
+ ref_head->qgroup_reserved = num_bytes;
+out:
+ spin_unlock(&delayed_refs->lock);
+ return ret;
+}
+
int btrfs_add_delayed_extent_op(struct btrfs_fs_info *fs_info,
struct btrfs_trans_handle *trans,
u64 bytenr, u64 num_bytes,
@@ -891,9 +905,9 @@ int btrfs_add_delayed_extent_op(struct btrfs_fs_info *fs_info,
delayed_refs = &trans->transaction->delayed_refs;
spin_lock(&delayed_refs->lock);
- add_delayed_ref_head(fs_info, trans, &head_ref->node, bytenr,
- num_bytes, BTRFS_UPDATE_DELAYED_HEAD,
- extent_op->is_data);
+ add_delayed_ref_head(fs_info, trans, &head_ref->node, NULL, bytenr,
+ num_bytes, 0, 0, BTRFS_UPDATE_DELAYED_HEAD,
+ extent_op->is_data);
spin_unlock(&delayed_refs->lock);
return 0;
diff --git a/kernel/fs/btrfs/delayed-ref.h b/kernel/fs/btrfs/delayed-ref.h
index 5eb089239..00ed02cbf 100644
--- a/kernel/fs/btrfs/delayed-ref.h
+++ b/kernel/fs/btrfs/delayed-ref.h
@@ -24,9 +24,25 @@
#define BTRFS_ADD_DELAYED_EXTENT 3 /* record a full extent allocation */
#define BTRFS_UPDATE_DELAYED_HEAD 4 /* not changing ref count on head ref */
+/*
+ * XXX: Qu: I really hate the design that ref_head and tree/data ref shares the
+ * same ref_node structure.
+ * Ref_head is in a higher logic level than tree/data ref, and duplicated
+ * bytenr/num_bytes in ref_node is really a waste or memory, they should be
+ * referred from ref_head.
+ * This gets more disgusting after we use list to store tree/data ref in
+ * ref_head. Must clean this mess up later.
+ */
struct btrfs_delayed_ref_node {
+ /*
+ * ref_head use rb tree, stored in ref_root->href.
+ * indexed by bytenr
+ */
struct rb_node rb_node;
+ /*data/tree ref use list, stored in ref_head->ref_list. */
+ struct list_head list;
+
/* the starting bytenr of the extent */
u64 bytenr;
@@ -52,7 +68,6 @@ struct btrfs_delayed_ref_node {
unsigned int action:8;
unsigned int type:8;
- unsigned int no_quota:1;
/* is this node still in the rbtree? */
unsigned int is_head:1;
unsigned int in_tree:1;
@@ -83,7 +98,7 @@ struct btrfs_delayed_ref_head {
struct mutex mutex;
spinlock_t lock;
- struct rb_root ref_root;
+ struct list_head ref_list;
struct rb_node href_node;
@@ -97,6 +112,17 @@ struct btrfs_delayed_ref_head {
int total_ref_mod;
/*
+ * For qgroup reserved space freeing.
+ *
+ * ref_root and reserved will be recorded after
+ * BTRFS_ADD_DELAYED_EXTENT is called.
+ * And will be used to free reserved qgroup space at
+ * run_delayed_refs() time.
+ */
+ u64 qgroup_ref_root;
+ u64 qgroup_reserved;
+
+ /*
* when a new extent is allocated, it is just reserved in memory
* The actual extent isn't inserted into the extent allocation tree
* until the delayed ref is processed. must_insert_reserved is
@@ -132,6 +158,9 @@ struct btrfs_delayed_ref_root {
/* head ref rbtree */
struct rb_root href_root;
+ /* dirty extent records */
+ struct rb_root dirty_extent_root;
+
/* this spin lock protects the rbtree and the entries inside */
spinlock_t lock;
@@ -156,6 +185,14 @@ struct btrfs_delayed_ref_root {
int flushing;
u64 run_delayed_start;
+
+ /*
+ * To make qgroup to skip given root.
+ * This is for snapshot, as btrfs_qgroup_inherit() will manully
+ * modify counters for snapshot and its source, so we should skip
+ * the snapshot in new_root/old_roots or it will get calculated twice
+ */
+ u64 qgroup_to_skip;
};
extern struct kmem_cache *btrfs_delayed_ref_head_cachep;
@@ -206,15 +243,16 @@ int btrfs_add_delayed_tree_ref(struct btrfs_fs_info *fs_info,
struct btrfs_trans_handle *trans,
u64 bytenr, u64 num_bytes, u64 parent,
u64 ref_root, int level, int action,
- struct btrfs_delayed_extent_op *extent_op,
- int no_quota);
+ struct btrfs_delayed_extent_op *extent_op);
int btrfs_add_delayed_data_ref(struct btrfs_fs_info *fs_info,
struct btrfs_trans_handle *trans,
u64 bytenr, u64 num_bytes,
u64 parent, u64 ref_root,
- u64 owner, u64 offset, int action,
- struct btrfs_delayed_extent_op *extent_op,
- int no_quota);
+ u64 owner, u64 offset, u64 reserved, int action,
+ struct btrfs_delayed_extent_op *extent_op);
+int btrfs_add_delayed_qgroup_reserve(struct btrfs_fs_info *fs_info,
+ struct btrfs_trans_handle *trans,
+ u64 ref_root, u64 bytenr, u64 num_bytes);
int btrfs_add_delayed_extent_op(struct btrfs_fs_info *fs_info,
struct btrfs_trans_handle *trans,
u64 bytenr, u64 num_bytes,
diff --git a/kernel/fs/btrfs/dev-replace.c b/kernel/fs/btrfs/dev-replace.c
index 0573848c7..1e668fb7d 100644
--- a/kernel/fs/btrfs/dev-replace.c
+++ b/kernel/fs/btrfs/dev-replace.c
@@ -183,8 +183,7 @@ no_valid_dev_replace_entry_found:
}
out:
- if (path)
- btrfs_free_path(path);
+ btrfs_free_path(path);
return ret;
}
@@ -328,19 +327,6 @@ int btrfs_dev_replace_start(struct btrfs_root *root,
args->start.tgtdev_name[0] == '\0')
return -EINVAL;
- /*
- * Here we commit the transaction to make sure commit_total_bytes
- * of all the devices are updated.
- */
- trans = btrfs_attach_transaction(root);
- if (!IS_ERR(trans)) {
- ret = btrfs_commit_transaction(trans, root);
- if (ret)
- return ret;
- } else if (PTR_ERR(trans) != -ENOENT) {
- return PTR_ERR(trans);
- }
-
/* the disk copy procedure reuses the scrub code */
mutex_lock(&fs_info->volume_mutex);
ret = btrfs_dev_replace_find_srcdev(root, args->start.srcdevid,
@@ -357,6 +343,19 @@ int btrfs_dev_replace_start(struct btrfs_root *root,
if (ret)
return ret;
+ /*
+ * Here we commit the transaction to make sure commit_total_bytes
+ * of all the devices are updated.
+ */
+ trans = btrfs_attach_transaction(root);
+ if (!IS_ERR(trans)) {
+ ret = btrfs_commit_transaction(trans, root);
+ if (ret)
+ return ret;
+ } else if (PTR_ERR(trans) != -ENOENT) {
+ return PTR_ERR(trans);
+ }
+
btrfs_dev_replace_lock(dev_replace);
switch (dev_replace->replace_state) {
case BTRFS_IOCTL_DEV_REPLACE_STATE_NEVER_STARTED:
@@ -376,8 +375,8 @@ int btrfs_dev_replace_start(struct btrfs_root *root,
WARN_ON(!tgt_device);
dev_replace->tgtdev = tgt_device;
- printk_in_rcu(KERN_INFO
- "BTRFS: dev_replace from %s (devid %llu) to %s started\n",
+ btrfs_info_in_rcu(root->fs_info,
+ "dev_replace from %s (devid %llu) to %s started",
src_device->missing ? "<missing disk>" :
rcu_str_deref(src_device->name),
src_device->devid,
@@ -398,6 +397,10 @@ int btrfs_dev_replace_start(struct btrfs_root *root,
args->result = BTRFS_IOCTL_DEV_REPLACE_RESULT_NO_ERROR;
btrfs_dev_replace_unlock(dev_replace);
+ ret = btrfs_sysfs_add_device_link(tgt_device->fs_devices, tgt_device);
+ if (ret)
+ btrfs_err(root->fs_info, "kobj add dev failed %d\n", ret);
+
btrfs_wait_ordered_roots(root->fs_info, -1);
/* force writing the updated state information to disk */
@@ -451,8 +454,7 @@ static void btrfs_rm_dev_replace_blocked(struct btrfs_fs_info *fs_info)
static void btrfs_rm_dev_replace_unblocked(struct btrfs_fs_info *fs_info)
{
clear_bit(BTRFS_FS_STATE_DEV_REPLACING, &fs_info->fs_state);
- if (waitqueue_active(&fs_info->replace_wait))
- wake_up(&fs_info->replace_wait);
+ wake_up(&fs_info->replace_wait);
}
static int btrfs_dev_replace_finishing(struct btrfs_fs_info *fs_info,
@@ -520,8 +522,8 @@ static int btrfs_dev_replace_finishing(struct btrfs_fs_info *fs_info,
src_device,
tgt_device);
} else {
- printk_in_rcu(KERN_ERR
- "BTRFS: btrfs_scrub_dev(%s, %llu, %s) failed %d\n",
+ btrfs_err_in_rcu(root->fs_info,
+ "btrfs_scrub_dev(%s, %llu, %s) failed %d",
src_device->missing ? "<missing disk>" :
rcu_str_deref(src_device->name),
src_device->devid,
@@ -537,8 +539,8 @@ static int btrfs_dev_replace_finishing(struct btrfs_fs_info *fs_info,
return scrub_ret;
}
- printk_in_rcu(KERN_INFO
- "BTRFS: dev_replace from %s (devid %llu) to %s finished\n",
+ btrfs_info_in_rcu(root->fs_info,
+ "dev_replace from %s (devid %llu) to %s finished",
src_device->missing ? "<missing disk>" :
rcu_str_deref(src_device->name),
src_device->devid,
@@ -583,8 +585,7 @@ static int btrfs_dev_replace_finishing(struct btrfs_fs_info *fs_info,
mutex_unlock(&uuid_mutex);
/* replace the sysfs entry */
- btrfs_kobj_rm_device(fs_info, src_device);
- btrfs_kobj_add_device(fs_info, tgt_device);
+ btrfs_sysfs_rm_device_link(fs_info->fs_devices, src_device);
btrfs_rm_dev_replace_free_srcdev(fs_info, src_device);
/* write back the superblocks */
@@ -807,8 +808,8 @@ static int btrfs_dev_replace_kthread(void *data)
progress = status_args->status.progress_1000;
kfree(status_args);
progress = div_u64(progress, 10);
- printk_in_rcu(KERN_INFO
- "BTRFS: continuing dev_replace from %s (devid %llu) to %s @%u%%\n",
+ btrfs_info_in_rcu(fs_info,
+ "continuing dev_replace from %s (devid %llu) to %s @%u%%",
dev_replace->srcdev->missing ? "<missing disk>" :
rcu_str_deref(dev_replace->srcdev->name),
dev_replace->srcdev->devid,
diff --git a/kernel/fs/btrfs/disk-io.c b/kernel/fs/btrfs/disk-io.c
index 2ef9a4b72..41fb43183 100644
--- a/kernel/fs/btrfs/disk-io.c
+++ b/kernel/fs/btrfs/disk-io.c
@@ -319,9 +319,9 @@ static int csum_tree_block(struct btrfs_fs_info *fs_info,
memcpy(&found, result, csum_size);
read_extent_buffer(buf, &val, 0, csum_size);
- printk_ratelimited(KERN_WARNING
- "BTRFS: %s checksum verify failed on %llu wanted %X found %X "
- "level %d\n",
+ btrfs_warn_rl(fs_info,
+ "%s checksum verify failed on %llu wanted %X found %X "
+ "level %d",
fs_info->sb->s_id, buf->start,
val, found, btrfs_header_level(buf));
if (result != (char *)&inline_result)
@@ -368,9 +368,9 @@ static int verify_parent_transid(struct extent_io_tree *io_tree,
ret = 0;
goto out;
}
- printk_ratelimited(KERN_ERR
- "BTRFS (device %s): parent transid verify failed on %llu wanted %llu found %llu\n",
- eb->fs_info->sb->s_id, eb->start,
+ btrfs_err_rl(eb->fs_info,
+ "parent transid verify failed on %llu wanted %llu found %llu",
+ eb->start,
parent_transid, btrfs_header_generation(eb));
ret = 1;
@@ -629,15 +629,14 @@ static int btree_readpage_end_io_hook(struct btrfs_io_bio *io_bio,
found_start = btrfs_header_bytenr(eb);
if (found_start != eb->start) {
- printk_ratelimited(KERN_ERR "BTRFS (device %s): bad tree block start "
- "%llu %llu\n",
- eb->fs_info->sb->s_id, found_start, eb->start);
+ btrfs_err_rl(eb->fs_info, "bad tree block start %llu %llu",
+ found_start, eb->start);
ret = -EIO;
goto err;
}
if (check_tree_block_fsid(root->fs_info, eb)) {
- printk_ratelimited(KERN_ERR "BTRFS (device %s): bad fsid on block %llu\n",
- eb->fs_info->sb->s_id, eb->start);
+ btrfs_err_rl(eb->fs_info, "bad fsid on block %llu",
+ eb->start);
ret = -EIO;
goto err;
}
@@ -703,7 +702,7 @@ static int btree_io_failed_hook(struct page *page, int failed_mirror)
return -EIO; /* we fixed nothing */
}
-static void end_workqueue_bio(struct bio *bio, int err)
+static void end_workqueue_bio(struct bio *bio)
{
struct btrfs_end_io_wq *end_io_wq = bio->bi_private;
struct btrfs_fs_info *fs_info;
@@ -711,7 +710,7 @@ static void end_workqueue_bio(struct bio *bio, int err)
btrfs_work_func_t func;
fs_info = end_io_wq->info;
- end_io_wq->error = err;
+ end_io_wq->error = bio->bi_error;
if (bio->bi_rw & REQ_WRITE) {
if (end_io_wq->metadata == BTRFS_WQ_ENDIO_METADATA) {
@@ -802,13 +801,17 @@ static void run_one_async_done(struct btrfs_work *work)
limit = btrfs_async_submit_limit(fs_info);
limit = limit * 2 / 3;
+ /*
+ * atomic_dec_return implies a barrier for waitqueue_active
+ */
if (atomic_dec_return(&fs_info->nr_async_submits) < limit &&
waitqueue_active(&fs_info->async_submit_wait))
wake_up(&fs_info->async_submit_wait);
/* If an error occured we just want to clean up the bio and move on */
if (async->error) {
- bio_endio(async->bio, async->error);
+ async->bio->bi_error = async->error;
+ bio_endio(async->bio);
return;
}
@@ -908,8 +911,10 @@ static int __btree_submit_bio_done(struct inode *inode, int rw, struct bio *bio,
* submission context. Just jump into btrfs_map_bio
*/
ret = btrfs_map_bio(BTRFS_I(inode)->root, rw, bio, mirror_num, 1);
- if (ret)
- bio_endio(bio, ret);
+ if (ret) {
+ bio->bi_error = ret;
+ bio_endio(bio);
+ }
return ret;
}
@@ -960,10 +965,13 @@ static int btree_submit_bio_hook(struct inode *inode, int rw, struct bio *bio,
__btree_submit_bio_done);
}
- if (ret) {
+ if (ret)
+ goto out_w_error;
+ return 0;
+
out_w_error:
- bio_endio(bio, ret);
- }
+ bio->bi_error = ret;
+ bio_endio(bio);
return ret;
}
@@ -1149,12 +1157,12 @@ struct extent_buffer *read_tree_block(struct btrfs_root *root, u64 bytenr,
buf = btrfs_find_create_tree_block(root, bytenr);
if (!buf)
- return NULL;
+ return ERR_PTR(-ENOMEM);
ret = btree_read_extent_buffer_pages(root, buf, 0, parent_transid);
if (ret) {
free_extent_buffer(buf);
- return NULL;
+ return ERR_PTR(ret);
}
return buf;
@@ -1259,6 +1267,7 @@ static void __setup_root(u32 nodesize, u32 sectorsize, u32 stripesize,
atomic_set(&root->orphan_inodes, 0);
atomic_set(&root->refs, 1);
atomic_set(&root->will_be_snapshoted, 0);
+ atomic_set(&root->qgroup_meta_rsv, 0);
root->log_transid = 0;
root->log_transid_committed = -1;
root->last_log_commit = 0;
@@ -1509,20 +1518,19 @@ static struct btrfs_root *btrfs_read_tree_root(struct btrfs_root *tree_root,
generation = btrfs_root_generation(&root->root_item);
root->node = read_tree_block(root, btrfs_root_bytenr(&root->root_item),
generation);
- if (!root->node) {
- ret = -ENOMEM;
+ if (IS_ERR(root->node)) {
+ ret = PTR_ERR(root->node);
goto find_fail;
} else if (!btrfs_buffer_uptodate(root->node, generation, 0)) {
ret = -EIO;
- goto read_fail;
+ free_extent_buffer(root->node);
+ goto find_fail;
}
root->commit_root = btrfs_root_node(root);
out:
btrfs_free_path(path);
return root;
-read_fail:
- free_extent_buffer(root->node);
find_fail:
kfree(root);
alloc_fail:
@@ -1574,8 +1582,23 @@ int btrfs_init_fs_root(struct btrfs_root *root)
ret = get_anon_bdev(&root->anon_dev);
if (ret)
goto free_writers;
+
+ mutex_lock(&root->objectid_mutex);
+ ret = btrfs_find_highest_objectid(root,
+ &root->highest_objectid);
+ if (ret) {
+ mutex_unlock(&root->objectid_mutex);
+ goto free_root_dev;
+ }
+
+ ASSERT(root->highest_objectid <= BTRFS_LAST_FREE_OBJECTID);
+
+ mutex_unlock(&root->objectid_mutex);
+
return 0;
+free_root_dev:
+ free_anon_bdev(root->anon_dev);
free_writers:
btrfs_free_subvolume_writers(root->subv_writers);
fail:
@@ -1725,6 +1748,7 @@ static int setup_bdi(struct btrfs_fs_info *info, struct backing_dev_info *bdi)
bdi->ra_pages = VM_MAX_READAHEAD * 1024 / PAGE_CACHE_SIZE;
bdi->congested_fn = btrfs_congested_fn;
bdi->congested_data = info;
+ bdi->capabilities |= BDI_CAP_CGROUP_WRITEBACK;
return 0;
}
@@ -1736,22 +1760,22 @@ static void end_workqueue_fn(struct btrfs_work *work)
{
struct bio *bio;
struct btrfs_end_io_wq *end_io_wq;
- int error;
end_io_wq = container_of(work, struct btrfs_end_io_wq, work);
bio = end_io_wq->bio;
- error = end_io_wq->error;
+ bio->bi_error = end_io_wq->error;
bio->bi_private = end_io_wq->private;
bio->bi_end_io = end_io_wq->end_io;
kmem_cache_free(btrfs_end_io_wq_cache, end_io_wq);
- bio_endio_nodec(bio, error);
+ bio_endio(bio);
}
static int cleaner_kthread(void *arg)
{
struct btrfs_root *root = arg;
int again;
+ struct btrfs_trans_handle *trans;
do {
again = 0;
@@ -1772,8 +1796,10 @@ static int cleaner_kthread(void *arg)
goto sleep;
}
+ mutex_lock(&root->fs_info->cleaner_delayed_iput_mutex);
btrfs_run_delayed_iputs(root);
- btrfs_delete_unused_bgs(root->fs_info);
+ mutex_unlock(&root->fs_info->cleaner_delayed_iput_mutex);
+
again = btrfs_clean_one_deleted_snapshot(root);
mutex_unlock(&root->fs_info->cleaner_mutex);
@@ -1782,6 +1808,16 @@ static int cleaner_kthread(void *arg)
* needn't do anything special here.
*/
btrfs_run_defrag_inodes(root->fs_info);
+
+ /*
+ * Acquires fs_info->delete_unused_bgs_mutex to avoid racing
+ * with relocation (btrfs_relocate_chunk) and relocation
+ * acquires fs_info->cleaner_mutex (btrfs_relocate_block_group)
+ * after acquiring fs_info->delete_unused_bgs_mutex. So we
+ * can't hold, nor need to, fs_info->cleaner_mutex when deleting
+ * unused block groups.
+ */
+ btrfs_delete_unused_bgs(root->fs_info);
sleep:
if (!try_to_freeze() && !again) {
set_current_state(TASK_INTERRUPTIBLE);
@@ -1790,6 +1826,34 @@ sleep:
__set_current_state(TASK_RUNNING);
}
} while (!kthread_should_stop());
+
+ /*
+ * Transaction kthread is stopped before us and wakes us up.
+ * However we might have started a new transaction and COWed some
+ * tree blocks when deleting unused block groups for example. So
+ * make sure we commit the transaction we started to have a clean
+ * shutdown when evicting the btree inode - if it has dirty pages
+ * when we do the final iput() on it, eviction will trigger a
+ * writeback for it which will fail with null pointer dereferences
+ * since work queues and other resources were already released and
+ * destroyed by the time the iput/eviction/writeback is made.
+ */
+ trans = btrfs_attach_transaction(root);
+ if (IS_ERR(trans)) {
+ if (PTR_ERR(trans) != -ENOENT)
+ btrfs_err(root->fs_info,
+ "cleaner transaction attach returned %ld",
+ PTR_ERR(trans));
+ } else {
+ int ret;
+
+ ret = btrfs_commit_transaction(trans, root);
+ if (ret)
+ btrfs_err(root->fs_info,
+ "cleaner open transaction commit returned %d",
+ ret);
+ }
+
return 0;
}
@@ -2305,8 +2369,7 @@ static int btrfs_replay_log(struct btrfs_fs_info *fs_info,
u64 bytenr = btrfs_super_log_root(disk_super);
if (fs_devices->rw_devices == 0) {
- printk(KERN_WARNING "BTRFS: log replay required "
- "on RO media\n");
+ btrfs_warn(fs_info, "log replay required on RO media");
return -EIO;
}
@@ -2320,9 +2383,13 @@ static int btrfs_replay_log(struct btrfs_fs_info *fs_info,
log_tree_root->node = read_tree_block(tree_root, bytenr,
fs_info->generation + 1);
- if (!log_tree_root->node ||
- !extent_buffer_uptodate(log_tree_root->node)) {
- printk(KERN_ERR "BTRFS: failed to read log tree\n");
+ if (IS_ERR(log_tree_root->node)) {
+ btrfs_warn(fs_info, "failed to read log tree");
+ ret = PTR_ERR(log_tree_root->node);
+ kfree(log_tree_root);
+ return ret;
+ } else if (!extent_buffer_uptodate(log_tree_root->node)) {
+ btrfs_err(fs_info, "failed to read log tree");
free_extent_buffer(log_tree_root->node);
kfree(log_tree_root);
return -EIO;
@@ -2330,7 +2397,7 @@ static int btrfs_replay_log(struct btrfs_fs_info *fs_info,
/* returns with log_tree_root freed on success */
ret = btrfs_recover_log_trees(log_tree_root);
if (ret) {
- btrfs_error(tree_root->fs_info, ret,
+ btrfs_std_error(tree_root->fs_info, ret,
"Failed to recover log tree");
free_extent_buffer(log_tree_root->node);
kfree(log_tree_root);
@@ -2489,12 +2556,12 @@ int open_ctree(struct super_block *sb,
spin_lock_init(&fs_info->unused_bgs_lock);
rwlock_init(&fs_info->tree_mod_log_lock);
mutex_init(&fs_info->unused_bg_unpin_mutex);
+ mutex_init(&fs_info->delete_unused_bgs_mutex);
mutex_init(&fs_info->reloc_mutex);
mutex_init(&fs_info->delalloc_root_mutex);
+ mutex_init(&fs_info->cleaner_delayed_iput_mutex);
seqlock_init(&fs_info->profiles_lock);
- init_rwsem(&fs_info->delayed_iput_sem);
- init_completion(&fs_info->kobj_unregister);
INIT_LIST_HEAD(&fs_info->dirty_cowonly_roots);
INIT_LIST_HEAD(&fs_info->space_info);
INIT_LIST_HEAD(&fs_info->tree_mod_seq_list);
@@ -2525,7 +2592,7 @@ int open_ctree(struct super_block *sb,
fs_info->commit_interval = BTRFS_DEFAULT_COMMIT_INTERVAL;
fs_info->avg_delayed_ref_runtime = NSEC_PER_SEC >> 6; /* div by 64 */
/* readahead state */
- INIT_RADIX_TREE(&fs_info->reada_tree, GFP_NOFS & ~__GFP_WAIT);
+ INIT_RADIX_TREE(&fs_info->reada_tree, GFP_NOFS & ~__GFP_DIRECT_RECLAIM);
spin_lock_init(&fs_info->reada_lock);
fs_info->thread_pool_size = min_t(unsigned long,
@@ -2567,7 +2634,6 @@ int open_ctree(struct super_block *sb,
mutex_init(&fs_info->ordered_operations_mutex);
- mutex_init(&fs_info->ordered_extent_flush_mutex);
mutex_init(&fs_info->tree_log_mutex);
mutex_init(&fs_info->chunk_mutex);
mutex_init(&fs_info->transaction_kthread_mutex);
@@ -2607,8 +2673,8 @@ int open_ctree(struct super_block *sb,
* Read super block and check the signature bytes only
*/
bh = btrfs_read_dev_super(fs_devices->latest_bdev);
- if (!bh) {
- err = -EINVAL;
+ if (IS_ERR(bh)) {
+ err = PTR_ERR(bh);
goto fail_alloc;
}
@@ -2619,6 +2685,7 @@ int open_ctree(struct super_block *sb,
if (btrfs_check_super_csum(bh->b_data)) {
printk(KERN_ERR "BTRFS: superblock checksum mismatch\n");
err = -EINVAL;
+ brelse(bh);
goto fail_alloc;
}
@@ -2797,10 +2864,13 @@ int open_ctree(struct super_block *sb,
chunk_root->node = read_tree_block(chunk_root,
btrfs_super_chunk_root(disk_super),
generation);
- if (!chunk_root->node ||
- !test_bit(EXTENT_BUFFER_UPTODATE, &chunk_root->node->bflags)) {
+ if (IS_ERR(chunk_root->node) ||
+ !extent_buffer_uptodate(chunk_root->node)) {
printk(KERN_ERR "BTRFS: failed to read chunk root on %s\n",
sb->s_id);
+ if (!IS_ERR(chunk_root->node))
+ free_extent_buffer(chunk_root->node);
+ chunk_root->node = NULL;
goto fail_tree_roots;
}
btrfs_set_root_node(&chunk_root->root_item, chunk_root->node);
@@ -2834,11 +2904,13 @@ retry_root_backup:
tree_root->node = read_tree_block(tree_root,
btrfs_super_root(disk_super),
generation);
- if (!tree_root->node ||
- !test_bit(EXTENT_BUFFER_UPTODATE, &tree_root->node->bflags)) {
+ if (IS_ERR(tree_root->node) ||
+ !extent_buffer_uptodate(tree_root->node)) {
printk(KERN_WARNING "BTRFS: failed to read tree root on %s\n",
sb->s_id);
-
+ if (!IS_ERR(tree_root->node))
+ free_extent_buffer(tree_root->node);
+ tree_root->node = NULL;
goto recovery_tree_root;
}
@@ -2846,6 +2918,18 @@ retry_root_backup:
tree_root->commit_root = btrfs_root_node(tree_root);
btrfs_set_root_refs(&tree_root->root_item, 1);
+ mutex_lock(&tree_root->objectid_mutex);
+ ret = btrfs_find_highest_objectid(tree_root,
+ &tree_root->highest_objectid);
+ if (ret) {
+ mutex_unlock(&tree_root->objectid_mutex);
+ goto recovery_tree_root;
+ }
+
+ ASSERT(tree_root->highest_objectid <= BTRFS_LAST_FREE_OBJECTID);
+
+ mutex_unlock(&tree_root->objectid_mutex);
+
ret = btrfs_read_roots(fs_info, tree_root);
if (ret)
goto recovery_tree_root;
@@ -2874,12 +2958,24 @@ retry_root_backup:
btrfs_close_extra_devices(fs_devices, 1);
- ret = btrfs_sysfs_add_one(fs_info);
+ ret = btrfs_sysfs_add_fsid(fs_devices, NULL);
if (ret) {
- pr_err("BTRFS: failed to init sysfs interface: %d\n", ret);
+ pr_err("BTRFS: failed to init sysfs fsid interface: %d\n", ret);
goto fail_block_groups;
}
+ ret = btrfs_sysfs_add_device(fs_devices);
+ if (ret) {
+ pr_err("BTRFS: failed to init sysfs device interface: %d\n", ret);
+ goto fail_fsdev_sysfs;
+ }
+
+ ret = btrfs_sysfs_add_mounted(fs_info);
+ if (ret) {
+ pr_err("BTRFS: failed to init sysfs interface: %d\n", ret);
+ goto fail_fsdev_sysfs;
+ }
+
ret = btrfs_init_space_info(fs_info);
if (ret) {
printk(KERN_ERR "BTRFS: Failed to initial space info: %d\n", ret);
@@ -2896,8 +2992,9 @@ retry_root_backup:
if (fs_info->fs_devices->missing_devices >
fs_info->num_tolerated_disk_barrier_failures &&
!(sb->s_flags & MS_RDONLY)) {
- printk(KERN_WARNING "BTRFS: "
- "too many missing devices, writeable mount is not allowed\n");
+ pr_warn("BTRFS: missing devices(%llu) exceeds the limit(%d), writeable mount is not allowed\n",
+ fs_info->fs_devices->missing_devices,
+ fs_info->num_tolerated_disk_barrier_failures);
goto fail_sysfs;
}
@@ -3053,7 +3150,10 @@ fail_cleaner:
filemap_write_and_wait(fs_info->btree_inode->i_mapping);
fail_sysfs:
- btrfs_sysfs_remove_one(fs_info);
+ btrfs_sysfs_remove_mounted(fs_info);
+
+fail_fsdev_sysfs:
+ btrfs_sysfs_remove_fsid(fs_info->fs_devices);
fail_block_groups:
btrfs_put_block_group_cache(fs_info);
@@ -3112,8 +3212,8 @@ static void btrfs_end_buffer_write_sync(struct buffer_head *bh, int uptodate)
struct btrfs_device *device = (struct btrfs_device *)
bh->b_private;
- printk_ratelimited_in_rcu(KERN_WARNING "BTRFS: lost page write due to "
- "I/O error on %s\n",
+ btrfs_warn_rl_in_rcu(device->dev_root->fs_info,
+ "lost page write due to IO error on %s",
rcu_str_deref(device->name));
/* note, we dont' set_buffer_write_io_error because we have
* our own ways of dealing with the IO errors
@@ -3125,6 +3225,37 @@ static void btrfs_end_buffer_write_sync(struct buffer_head *bh, int uptodate)
put_bh(bh);
}
+int btrfs_read_dev_one_super(struct block_device *bdev, int copy_num,
+ struct buffer_head **bh_ret)
+{
+ struct buffer_head *bh;
+ struct btrfs_super_block *super;
+ u64 bytenr;
+
+ bytenr = btrfs_sb_offset(copy_num);
+ if (bytenr + BTRFS_SUPER_INFO_SIZE >= i_size_read(bdev->bd_inode))
+ return -EINVAL;
+
+ bh = __bread(bdev, bytenr / 4096, BTRFS_SUPER_INFO_SIZE);
+ /*
+ * If we fail to read from the underlying devices, as of now
+ * the best option we have is to mark it EIO.
+ */
+ if (!bh)
+ return -EIO;
+
+ super = (struct btrfs_super_block *)bh->b_data;
+ if (btrfs_super_bytenr(super) != bytenr ||
+ btrfs_super_magic(super) != BTRFS_MAGIC) {
+ brelse(bh);
+ return -EINVAL;
+ }
+
+ *bh_ret = bh;
+ return 0;
+}
+
+
struct buffer_head *btrfs_read_dev_super(struct block_device *bdev)
{
struct buffer_head *bh;
@@ -3132,7 +3263,7 @@ struct buffer_head *btrfs_read_dev_super(struct block_device *bdev)
struct btrfs_super_block *super;
int i;
u64 transid = 0;
- u64 bytenr;
+ int ret = -EINVAL;
/* we would like to check all the supers, but that would make
* a btrfs mount succeed after a mkfs from a different FS.
@@ -3140,21 +3271,11 @@ struct buffer_head *btrfs_read_dev_super(struct block_device *bdev)
* later supers, using BTRFS_SUPER_MIRROR_MAX instead
*/
for (i = 0; i < 1; i++) {
- bytenr = btrfs_sb_offset(i);
- if (bytenr + BTRFS_SUPER_INFO_SIZE >=
- i_size_read(bdev->bd_inode))
- break;
- bh = __bread(bdev, bytenr / 4096,
- BTRFS_SUPER_INFO_SIZE);
- if (!bh)
+ ret = btrfs_read_dev_one_super(bdev, i, &bh);
+ if (ret)
continue;
super = (struct btrfs_super_block *)bh->b_data;
- if (btrfs_super_bytenr(super) != bytenr ||
- btrfs_super_magic(super) != BTRFS_MAGIC) {
- brelse(bh);
- continue;
- }
if (!latest || btrfs_super_generation(super) > transid) {
brelse(latest);
@@ -3164,6 +3285,10 @@ struct buffer_head *btrfs_read_dev_super(struct block_device *bdev)
brelse(bh);
}
}
+
+ if (!latest)
+ return ERR_PTR(ret);
+
return latest;
}
@@ -3232,8 +3357,9 @@ static int write_dev_supers(struct btrfs_device *device,
bh = __getblk(device->bdev, bytenr / 4096,
BTRFS_SUPER_INFO_SIZE);
if (!bh) {
- printk(KERN_ERR "BTRFS: couldn't get super "
- "buffer head for bytenr %Lu\n", bytenr);
+ btrfs_err(device->dev_root->fs_info,
+ "couldn't get super buffer head for bytenr %llu",
+ bytenr);
errors++;
continue;
}
@@ -3267,13 +3393,8 @@ static int write_dev_supers(struct btrfs_device *device,
* endio for the write_dev_flush, this will wake anyone waiting
* for the barrier when it is done
*/
-static void btrfs_end_empty_barrier(struct bio *bio, int err)
+static void btrfs_end_empty_barrier(struct bio *bio)
{
- if (err) {
- if (err == -EOPNOTSUPP)
- set_bit(BIO_EOPNOTSUPP, &bio->bi_flags);
- clear_bit(BIO_UPTODATE, &bio->bi_flags);
- }
if (bio->bi_private)
complete(bio->bi_private);
bio_put(bio);
@@ -3301,12 +3422,8 @@ static int write_dev_flush(struct btrfs_device *device, int wait)
wait_for_completion(&device->flush_wait);
- if (bio_flagged(bio, BIO_EOPNOTSUPP)) {
- printk_in_rcu("BTRFS: disabling barriers on dev %s\n",
- rcu_str_deref(device->name));
- device->nobarriers = 1;
- } else if (!bio_flagged(bio, BIO_UPTODATE)) {
- ret = -EIO;
+ if (bio->bi_error) {
+ ret = bio->bi_error;
btrfs_dev_stat_inc_and_print(device,
BTRFS_DEV_STAT_FLUSH_ERRS);
}
@@ -3389,6 +3506,35 @@ static int barrier_all_devices(struct btrfs_fs_info *info)
return 0;
}
+int btrfs_get_num_tolerated_disk_barrier_failures(u64 flags)
+{
+ int raid_type;
+ int min_tolerated = INT_MAX;
+
+ if ((flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) == 0 ||
+ (flags & BTRFS_AVAIL_ALLOC_BIT_SINGLE))
+ min_tolerated = min(min_tolerated,
+ btrfs_raid_array[BTRFS_RAID_SINGLE].
+ tolerated_failures);
+
+ for (raid_type = 0; raid_type < BTRFS_NR_RAID_TYPES; raid_type++) {
+ if (raid_type == BTRFS_RAID_SINGLE)
+ continue;
+ if (!(flags & btrfs_raid_group[raid_type]))
+ continue;
+ min_tolerated = min(min_tolerated,
+ btrfs_raid_array[raid_type].
+ tolerated_failures);
+ }
+
+ if (min_tolerated == INT_MAX) {
+ pr_warn("BTRFS: unknown raid flag: %llu\n", flags);
+ min_tolerated = 0;
+ }
+
+ return min_tolerated;
+}
+
int btrfs_calc_num_tolerated_disk_barrier_failures(
struct btrfs_fs_info *fs_info)
{
@@ -3398,13 +3544,12 @@ int btrfs_calc_num_tolerated_disk_barrier_failures(
BTRFS_BLOCK_GROUP_SYSTEM,
BTRFS_BLOCK_GROUP_METADATA,
BTRFS_BLOCK_GROUP_DATA | BTRFS_BLOCK_GROUP_METADATA};
- int num_types = 4;
int i;
int c;
int num_tolerated_disk_barrier_failures =
(int)fs_info->fs_devices->num_devices;
- for (i = 0; i < num_types; i++) {
+ for (i = 0; i < ARRAY_SIZE(types); i++) {
struct btrfs_space_info *tmp;
sinfo = NULL;
@@ -3422,44 +3567,21 @@ int btrfs_calc_num_tolerated_disk_barrier_failures(
down_read(&sinfo->groups_sem);
for (c = 0; c < BTRFS_NR_RAID_TYPES; c++) {
- if (!list_empty(&sinfo->block_groups[c])) {
- u64 flags;
-
- btrfs_get_block_group_info(
- &sinfo->block_groups[c], &space);
- if (space.total_bytes == 0 ||
- space.used_bytes == 0)
- continue;
- flags = space.flags;
- /*
- * return
- * 0: if dup, single or RAID0 is configured for
- * any of metadata, system or data, else
- * 1: if RAID5 is configured, or if RAID1 or
- * RAID10 is configured and only two mirrors
- * are used, else
- * 2: if RAID6 is configured, else
- * num_mirrors - 1: if RAID1 or RAID10 is
- * configured and more than
- * 2 mirrors are used.
- */
- if (num_tolerated_disk_barrier_failures > 0 &&
- ((flags & (BTRFS_BLOCK_GROUP_DUP |
- BTRFS_BLOCK_GROUP_RAID0)) ||
- ((flags & BTRFS_BLOCK_GROUP_PROFILE_MASK)
- == 0)))
- num_tolerated_disk_barrier_failures = 0;
- else if (num_tolerated_disk_barrier_failures > 1) {
- if (flags & (BTRFS_BLOCK_GROUP_RAID1 |
- BTRFS_BLOCK_GROUP_RAID5 |
- BTRFS_BLOCK_GROUP_RAID10)) {
- num_tolerated_disk_barrier_failures = 1;
- } else if (flags &
- BTRFS_BLOCK_GROUP_RAID6) {
- num_tolerated_disk_barrier_failures = 2;
- }
- }
- }
+ u64 flags;
+
+ if (list_empty(&sinfo->block_groups[c]))
+ continue;
+
+ btrfs_get_block_group_info(&sinfo->block_groups[c],
+ &space);
+ if (space.total_bytes == 0 || space.used_bytes == 0)
+ continue;
+ flags = space.flags;
+
+ num_tolerated_disk_barrier_failures = min(
+ num_tolerated_disk_barrier_failures,
+ btrfs_get_num_tolerated_disk_barrier_failures(
+ flags));
}
up_read(&sinfo->groups_sem);
}
@@ -3494,7 +3616,7 @@ static int write_all_supers(struct btrfs_root *root, int max_mirrors)
if (ret) {
mutex_unlock(
&root->fs_info->fs_devices->device_list_mutex);
- btrfs_error(root->fs_info, ret,
+ btrfs_std_error(root->fs_info, ret,
"errors while submitting device barriers.");
return ret;
}
@@ -3534,7 +3656,7 @@ static int write_all_supers(struct btrfs_root *root, int max_mirrors)
mutex_unlock(&root->fs_info->fs_devices->device_list_mutex);
/* FUA is masked off if unsupported and can't be the reason */
- btrfs_error(root->fs_info, -EIO,
+ btrfs_std_error(root->fs_info, -EIO,
"%d errors while writing supers", total_errors);
return -EIO;
}
@@ -3552,7 +3674,7 @@ static int write_all_supers(struct btrfs_root *root, int max_mirrors)
}
mutex_unlock(&root->fs_info->fs_devices->device_list_mutex);
if (total_errors > max_errors) {
- btrfs_error(root->fs_info, -EIO,
+ btrfs_std_error(root->fs_info, -EIO,
"%d errors while writing supers", total_errors);
return -EIO;
}
@@ -3688,6 +3810,9 @@ void close_ctree(struct btrfs_root *root)
fs_info->closing = 1;
smp_mb();
+ /* wait for the qgroup rescan worker to stop */
+ btrfs_qgroup_wait_for_completion(fs_info);
+
/* wait for the uuid_scan task to finish */
down(&fs_info->uuid_tree_rescan_sem);
/* avoid complains from lockdep et al., set sem back to initial state */
@@ -3710,6 +3835,13 @@ void close_ctree(struct btrfs_root *root)
cancel_work_sync(&fs_info->async_reclaim_work);
if (!(fs_info->sb->s_flags & MS_RDONLY)) {
+ /*
+ * If the cleaner thread is stopped and there are
+ * block groups queued for removal, the deletion will be
+ * skipped when we quit the cleaner thread.
+ */
+ btrfs_delete_unused_bgs(root->fs_info);
+
ret = btrfs_commit_super(root);
if (ret)
btrfs_err(fs_info, "commit super ret %d", ret);
@@ -3731,7 +3863,8 @@ void close_ctree(struct btrfs_root *root)
percpu_counter_sum(&fs_info->delalloc_bytes));
}
- btrfs_sysfs_remove_one(fs_info);
+ btrfs_sysfs_remove_mounted(fs_info);
+ btrfs_sysfs_remove_fsid(fs_info->fs_devices);
btrfs_free_fs_roots(fs_info);
@@ -4060,6 +4193,7 @@ static int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans,
while ((node = rb_first(&delayed_refs->href_root)) != NULL) {
struct btrfs_delayed_ref_head *head;
+ struct btrfs_delayed_ref_node *tmp;
bool pin_bytes = false;
head = rb_entry(node, struct btrfs_delayed_ref_head,
@@ -4075,11 +4209,10 @@ static int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans,
continue;
}
spin_lock(&head->lock);
- while ((node = rb_first(&head->ref_root)) != NULL) {
- ref = rb_entry(node, struct btrfs_delayed_ref_node,
- rb_node);
+ list_for_each_entry_safe_reverse(ref, tmp, &head->ref_list,
+ list) {
ref->in_tree = 0;
- rb_erase(&ref->rb_node, &head->ref_root);
+ list_del(&ref->list);
atomic_dec(&delayed_refs->num_entries);
btrfs_put_delayed_ref(ref);
}
@@ -4228,25 +4361,6 @@ again:
return 0;
}
-static void btrfs_free_pending_ordered(struct btrfs_transaction *cur_trans,
- struct btrfs_fs_info *fs_info)
-{
- struct btrfs_ordered_extent *ordered;
-
- spin_lock(&fs_info->trans_lock);
- while (!list_empty(&cur_trans->pending_ordered)) {
- ordered = list_first_entry(&cur_trans->pending_ordered,
- struct btrfs_ordered_extent,
- trans_list);
- list_del_init(&ordered->trans_list);
- spin_unlock(&fs_info->trans_lock);
-
- btrfs_put_ordered_extent(ordered);
- spin_lock(&fs_info->trans_lock);
- }
- spin_unlock(&fs_info->trans_lock);
-}
-
void btrfs_cleanup_one_transaction(struct btrfs_transaction *cur_trans,
struct btrfs_root *root)
{
@@ -4258,7 +4372,6 @@ void btrfs_cleanup_one_transaction(struct btrfs_transaction *cur_trans,
cur_trans->state = TRANS_STATE_UNBLOCKED;
wake_up(&root->fs_info->transaction_wait);
- btrfs_free_pending_ordered(cur_trans, root->fs_info);
btrfs_destroy_delayed_inodes(root);
btrfs_assert_delayed_root_empty(root);
diff --git a/kernel/fs/btrfs/disk-io.h b/kernel/fs/btrfs/disk-io.h
index d4cbfeeee..adeb31830 100644
--- a/kernel/fs/btrfs/disk-io.h
+++ b/kernel/fs/btrfs/disk-io.h
@@ -60,6 +60,8 @@ void close_ctree(struct btrfs_root *root);
int write_ctree_super(struct btrfs_trans_handle *trans,
struct btrfs_root *root, int max_mirrors);
struct buffer_head *btrfs_read_dev_super(struct block_device *bdev);
+int btrfs_read_dev_one_super(struct block_device *bdev, int copy_num,
+ struct buffer_head **bh_ret);
int btrfs_commit_super(struct btrfs_root *root);
struct extent_buffer *btrfs_find_tree_block(struct btrfs_fs_info *fs_info,
u64 bytenr);
@@ -139,6 +141,7 @@ struct btrfs_root *btrfs_create_tree(struct btrfs_trans_handle *trans,
u64 objectid);
int btree_lock_page_hook(struct page *page, void *data,
void (*flush_fn)(void *));
+int btrfs_get_num_tolerated_disk_barrier_failures(u64 flags);
int btrfs_calc_num_tolerated_disk_barrier_failures(
struct btrfs_fs_info *fs_info);
int __init btrfs_end_io_wq_init(void);
diff --git a/kernel/fs/btrfs/export.c b/kernel/fs/btrfs/export.c
index 8d052209f..2513a7f53 100644
--- a/kernel/fs/btrfs/export.c
+++ b/kernel/fs/btrfs/export.c
@@ -112,11 +112,11 @@ static struct dentry *btrfs_fh_to_parent(struct super_block *sb, struct fid *fh,
u32 generation;
if (fh_type == FILEID_BTRFS_WITH_PARENT) {
- if (fh_len != BTRFS_FID_SIZE_CONNECTABLE)
+ if (fh_len < BTRFS_FID_SIZE_CONNECTABLE)
return NULL;
root_objectid = fid->root_objectid;
} else if (fh_type == FILEID_BTRFS_WITH_PARENT_ROOT) {
- if (fh_len != BTRFS_FID_SIZE_CONNECTABLE_ROOT)
+ if (fh_len < BTRFS_FID_SIZE_CONNECTABLE_ROOT)
return NULL;
root_objectid = fid->parent_root_objectid;
} else
@@ -136,11 +136,11 @@ static struct dentry *btrfs_fh_to_dentry(struct super_block *sb, struct fid *fh,
u32 generation;
if ((fh_type != FILEID_BTRFS_WITH_PARENT ||
- fh_len != BTRFS_FID_SIZE_CONNECTABLE) &&
+ fh_len < BTRFS_FID_SIZE_CONNECTABLE) &&
(fh_type != FILEID_BTRFS_WITH_PARENT_ROOT ||
- fh_len != BTRFS_FID_SIZE_CONNECTABLE_ROOT) &&
+ fh_len < BTRFS_FID_SIZE_CONNECTABLE_ROOT) &&
(fh_type != FILEID_BTRFS_WITHOUT_PARENT ||
- fh_len != BTRFS_FID_SIZE_NON_CONNECTABLE))
+ fh_len < BTRFS_FID_SIZE_NON_CONNECTABLE))
return NULL;
objectid = fid->objectid;
diff --git a/kernel/fs/btrfs/extent-tree.c b/kernel/fs/btrfs/extent-tree.c
index 0ec3acd14..2368cac11 100644
--- a/kernel/fs/btrfs/extent-tree.c
+++ b/kernel/fs/btrfs/extent-tree.c
@@ -79,11 +79,10 @@ static int update_block_group(struct btrfs_trans_handle *trans,
u64 num_bytes, int alloc);
static int __btrfs_free_extent(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
- u64 bytenr, u64 num_bytes, u64 parent,
+ struct btrfs_delayed_ref_node *node, u64 parent,
u64 root_objectid, u64 owner_objectid,
u64 owner_offset, int refs_to_drop,
- struct btrfs_delayed_extent_op *extra_op,
- int no_quota);
+ struct btrfs_delayed_extent_op *extra_op);
static void __run_delayed_extent_op(struct btrfs_delayed_extent_op *extent_op,
struct extent_buffer *leaf,
struct btrfs_extent_item *ei);
@@ -96,8 +95,7 @@ static int alloc_reserved_tree_block(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
u64 parent, u64 root_objectid,
u64 flags, struct btrfs_disk_key *key,
- int level, struct btrfs_key *ins,
- int no_quota);
+ int level, struct btrfs_key *ins);
static int do_chunk_alloc(struct btrfs_trans_handle *trans,
struct btrfs_root *extent_root, u64 flags,
int force);
@@ -126,7 +124,7 @@ static int block_group_bits(struct btrfs_block_group_cache *cache, u64 bits)
return (cache->flags & bits) == bits;
}
-static void btrfs_get_block_group(struct btrfs_block_group_cache *cache)
+void btrfs_get_block_group(struct btrfs_block_group_cache *cache)
{
atomic_inc(&cache->count);
}
@@ -333,6 +331,27 @@ static void put_caching_control(struct btrfs_caching_control *ctl)
kfree(ctl);
}
+#ifdef CONFIG_BTRFS_DEBUG
+static void fragment_free_space(struct btrfs_root *root,
+ struct btrfs_block_group_cache *block_group)
+{
+ u64 start = block_group->key.objectid;
+ u64 len = block_group->key.offset;
+ u64 chunk = block_group->flags & BTRFS_BLOCK_GROUP_METADATA ?
+ root->nodesize : root->sectorsize;
+ u64 step = chunk << 1;
+
+ while (len > chunk) {
+ btrfs_remove_free_space(block_group, start, chunk);
+ start += step;
+ if (len < step)
+ len = 0;
+ else
+ len -= step;
+ }
+}
+#endif
+
/*
* this is only called by cache_block_group, since we could have freed extents
* we need to check the pinned_extents for any extents that can't be used yet
@@ -389,6 +408,7 @@ static noinline void caching_thread(struct btrfs_work *work)
u64 last = 0;
u32 nritems;
int ret = -ENOMEM;
+ bool wakeup = true;
caching_ctl = container_of(work, struct btrfs_caching_control, work);
block_group = caching_ctl->block_group;
@@ -401,6 +421,15 @@ static noinline void caching_thread(struct btrfs_work *work)
last = max_t(u64, block_group->key.objectid, BTRFS_SUPER_INFO_OFFSET);
+#ifdef CONFIG_BTRFS_DEBUG
+ /*
+ * If we're fragmenting we don't want to make anybody think we can
+ * allocate from this block group until we've had a chance to fragment
+ * the free space.
+ */
+ if (btrfs_should_fragment_free_space(extent_root, block_group))
+ wakeup = false;
+#endif
/*
* We don't want to deadlock with somebody trying to allocate a new
* extent for the extent root while also trying to search the extent
@@ -442,7 +471,8 @@ next:
if (need_resched() ||
rwsem_is_contended(&fs_info->commit_root_sem)) {
- caching_ctl->progress = last;
+ if (wakeup)
+ caching_ctl->progress = last;
btrfs_release_path(path);
up_read(&fs_info->commit_root_sem);
mutex_unlock(&caching_ctl->mutex);
@@ -465,7 +495,8 @@ next:
key.offset = 0;
key.type = BTRFS_EXTENT_ITEM_KEY;
- caching_ctl->progress = last;
+ if (wakeup)
+ caching_ctl->progress = last;
btrfs_release_path(path);
goto next;
}
@@ -492,7 +523,8 @@ next:
if (total_found > (1024 * 1024 * 2)) {
total_found = 0;
- wake_up(&caching_ctl->wait);
+ if (wakeup)
+ wake_up(&caching_ctl->wait);
}
}
path->slots[0]++;
@@ -502,13 +534,27 @@ next:
total_found += add_new_free_space(block_group, fs_info, last,
block_group->key.objectid +
block_group->key.offset);
- caching_ctl->progress = (u64)-1;
-
spin_lock(&block_group->lock);
block_group->caching_ctl = NULL;
block_group->cached = BTRFS_CACHE_FINISHED;
spin_unlock(&block_group->lock);
+#ifdef CONFIG_BTRFS_DEBUG
+ if (btrfs_should_fragment_free_space(extent_root, block_group)) {
+ u64 bytes_used;
+
+ spin_lock(&block_group->space_info->lock);
+ spin_lock(&block_group->lock);
+ bytes_used = block_group->key.offset -
+ btrfs_block_group_used(&block_group->item);
+ block_group->space_info->bytes_used += bytes_used >> 1;
+ spin_unlock(&block_group->lock);
+ spin_unlock(&block_group->space_info->lock);
+ fragment_free_space(extent_root, block_group);
+ }
+#endif
+
+ caching_ctl->progress = (u64)-1;
err:
btrfs_free_path(path);
up_read(&fs_info->commit_root_sem);
@@ -608,6 +654,22 @@ static int cache_block_group(struct btrfs_block_group_cache *cache,
}
}
spin_unlock(&cache->lock);
+#ifdef CONFIG_BTRFS_DEBUG
+ if (ret == 1 &&
+ btrfs_should_fragment_free_space(fs_info->extent_root,
+ cache)) {
+ u64 bytes_used;
+
+ spin_lock(&cache->space_info->lock);
+ spin_lock(&cache->lock);
+ bytes_used = cache->key.offset -
+ btrfs_block_group_used(&cache->item);
+ cache->space_info->bytes_used += bytes_used >> 1;
+ spin_unlock(&cache->lock);
+ spin_unlock(&cache->space_info->lock);
+ fragment_free_space(fs_info->extent_root, cache);
+ }
+#endif
mutex_unlock(&caching_ctl->mutex);
wake_up(&caching_ctl->wait);
@@ -1317,8 +1379,7 @@ static noinline int remove_extent_data_ref(struct btrfs_trans_handle *trans,
return ret;
}
-static noinline u32 extent_data_ref_count(struct btrfs_root *root,
- struct btrfs_path *path,
+static noinline u32 extent_data_ref_count(struct btrfs_path *path,
struct btrfs_extent_inline_ref *iref)
{
struct btrfs_key key;
@@ -1884,10 +1945,77 @@ static int remove_extent_backref(struct btrfs_trans_handle *trans,
return ret;
}
-static int btrfs_issue_discard(struct block_device *bdev,
- u64 start, u64 len)
+#define in_range(b, first, len) ((b) >= (first) && (b) < (first) + (len))
+static int btrfs_issue_discard(struct block_device *bdev, u64 start, u64 len,
+ u64 *discarded_bytes)
{
- return blkdev_issue_discard(bdev, start >> 9, len >> 9, GFP_NOFS, 0);
+ int j, ret = 0;
+ u64 bytes_left, end;
+ u64 aligned_start = ALIGN(start, 1 << 9);
+
+ if (WARN_ON(start != aligned_start)) {
+ len -= aligned_start - start;
+ len = round_down(len, 1 << 9);
+ start = aligned_start;
+ }
+
+ *discarded_bytes = 0;
+
+ if (!len)
+ return 0;
+
+ end = start + len;
+ bytes_left = len;
+
+ /* Skip any superblocks on this device. */
+ for (j = 0; j < BTRFS_SUPER_MIRROR_MAX; j++) {
+ u64 sb_start = btrfs_sb_offset(j);
+ u64 sb_end = sb_start + BTRFS_SUPER_INFO_SIZE;
+ u64 size = sb_start - start;
+
+ if (!in_range(sb_start, start, bytes_left) &&
+ !in_range(sb_end, start, bytes_left) &&
+ !in_range(start, sb_start, BTRFS_SUPER_INFO_SIZE))
+ continue;
+
+ /*
+ * Superblock spans beginning of range. Adjust start and
+ * try again.
+ */
+ if (sb_start <= start) {
+ start += sb_end - start;
+ if (start > end) {
+ bytes_left = 0;
+ break;
+ }
+ bytes_left = end - start;
+ continue;
+ }
+
+ if (size) {
+ ret = blkdev_issue_discard(bdev, start >> 9, size >> 9,
+ GFP_NOFS, 0);
+ if (!ret)
+ *discarded_bytes += size;
+ else if (ret != -EOPNOTSUPP)
+ return ret;
+ }
+
+ start = sb_end;
+ if (start > end) {
+ bytes_left = 0;
+ break;
+ }
+ bytes_left = end - start;
+ }
+
+ if (bytes_left) {
+ ret = blkdev_issue_discard(bdev, start >> 9, bytes_left >> 9,
+ GFP_NOFS, 0);
+ if (!ret)
+ *discarded_bytes += bytes_left;
+ }
+ return ret;
}
int btrfs_discard_extent(struct btrfs_root *root, u64 bytenr,
@@ -1908,14 +2036,16 @@ int btrfs_discard_extent(struct btrfs_root *root, u64 bytenr,
for (i = 0; i < bbio->num_stripes; i++, stripe++) {
+ u64 bytes;
if (!stripe->dev->can_discard)
continue;
ret = btrfs_issue_discard(stripe->dev->bdev,
stripe->physical,
- stripe->length);
+ stripe->length,
+ &bytes);
if (!ret)
- discarded_bytes += stripe->length;
+ discarded_bytes += bytes;
else if (ret != -EOPNOTSUPP)
break; /* Logic errors or -ENOMEM, or -EIO but I don't know how that could happen JDM */
@@ -1942,8 +2072,7 @@ int btrfs_discard_extent(struct btrfs_root *root, u64 bytenr,
int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
u64 bytenr, u64 num_bytes, u64 parent,
- u64 root_objectid, u64 owner, u64 offset,
- int no_quota)
+ u64 root_objectid, u64 owner, u64 offset)
{
int ret;
struct btrfs_fs_info *fs_info = root->fs_info;
@@ -1955,22 +2084,21 @@ int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
ret = btrfs_add_delayed_tree_ref(fs_info, trans, bytenr,
num_bytes,
parent, root_objectid, (int)owner,
- BTRFS_ADD_DELAYED_REF, NULL, no_quota);
+ BTRFS_ADD_DELAYED_REF, NULL);
} else {
ret = btrfs_add_delayed_data_ref(fs_info, trans, bytenr,
- num_bytes,
- parent, root_objectid, owner, offset,
- BTRFS_ADD_DELAYED_REF, NULL, no_quota);
+ num_bytes, parent, root_objectid,
+ owner, offset, 0,
+ BTRFS_ADD_DELAYED_REF, NULL);
}
return ret;
}
static int __btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
- u64 bytenr, u64 num_bytes,
+ struct btrfs_delayed_ref_node *node,
u64 parent, u64 root_objectid,
u64 owner, u64 offset, int refs_to_add,
- int no_quota,
struct btrfs_delayed_extent_op *extent_op)
{
struct btrfs_fs_info *fs_info = root->fs_info;
@@ -1978,17 +2106,15 @@ static int __btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
struct extent_buffer *leaf;
struct btrfs_extent_item *item;
struct btrfs_key key;
+ u64 bytenr = node->bytenr;
+ u64 num_bytes = node->num_bytes;
u64 refs;
int ret;
- enum btrfs_qgroup_operation_type type = BTRFS_QGROUP_OPER_ADD_EXCL;
path = btrfs_alloc_path();
if (!path)
return -ENOMEM;
- if (!is_fstree(root_objectid) || !root->fs_info->quota_enabled)
- no_quota = 1;
-
path->reada = 1;
path->leave_spinning = 1;
/* this will setup the path even if it fails to insert the back ref */
@@ -1996,26 +2122,8 @@ static int __btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
bytenr, num_bytes, parent,
root_objectid, owner, offset,
refs_to_add, extent_op);
- if ((ret < 0 && ret != -EAGAIN) || (!ret && no_quota))
+ if ((ret < 0 && ret != -EAGAIN) || !ret)
goto out;
- /*
- * Ok we were able to insert an inline extent and it appears to be a new
- * reference, deal with the qgroup accounting.
- */
- if (!ret && !no_quota) {
- ASSERT(root->fs_info->quota_enabled);
- leaf = path->nodes[0];
- btrfs_item_key_to_cpu(leaf, &key, path->slots[0]);
- item = btrfs_item_ptr(leaf, path->slots[0],
- struct btrfs_extent_item);
- if (btrfs_extent_refs(leaf, item) > (u64)refs_to_add)
- type = BTRFS_QGROUP_OPER_ADD_SHARED;
- btrfs_release_path(path);
-
- ret = btrfs_qgroup_record_ref(trans, fs_info, root_objectid,
- bytenr, num_bytes, type, 0);
- goto out;
- }
/*
* Ok we had -EAGAIN which means we didn't have space to insert and
@@ -2026,8 +2134,6 @@ static int __btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
btrfs_item_key_to_cpu(leaf, &key, path->slots[0]);
item = btrfs_item_ptr(leaf, path->slots[0], struct btrfs_extent_item);
refs = btrfs_extent_refs(leaf, item);
- if (refs)
- type = BTRFS_QGROUP_OPER_ADD_SHARED;
btrfs_set_extent_refs(leaf, item, refs + refs_to_add);
if (extent_op)
__run_delayed_extent_op(extent_op, leaf, item);
@@ -2035,13 +2141,6 @@ static int __btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
btrfs_mark_buffer_dirty(leaf);
btrfs_release_path(path);
- if (!no_quota) {
- ret = btrfs_qgroup_record_ref(trans, fs_info, root_objectid,
- bytenr, num_bytes, type, 0);
- if (ret)
- goto out;
- }
-
path->reada = 1;
path->leave_spinning = 1;
/* now insert the actual backref */
@@ -2087,17 +2186,15 @@ static int run_delayed_data_ref(struct btrfs_trans_handle *trans,
ref->objectid, ref->offset,
&ins, node->ref_mod);
} else if (node->action == BTRFS_ADD_DELAYED_REF) {
- ret = __btrfs_inc_extent_ref(trans, root, node->bytenr,
- node->num_bytes, parent,
+ ret = __btrfs_inc_extent_ref(trans, root, node, parent,
ref_root, ref->objectid,
ref->offset, node->ref_mod,
- node->no_quota, extent_op);
+ extent_op);
} else if (node->action == BTRFS_DROP_DELAYED_REF) {
- ret = __btrfs_free_extent(trans, root, node->bytenr,
- node->num_bytes, parent,
+ ret = __btrfs_free_extent(trans, root, node, parent,
ref_root, ref->objectid,
ref->offset, node->ref_mod,
- extent_op, node->no_quota);
+ extent_op);
} else {
BUG();
}
@@ -2252,18 +2349,16 @@ static int run_delayed_tree_ref(struct btrfs_trans_handle *trans,
parent, ref_root,
extent_op->flags_to_set,
&extent_op->key,
- ref->level, &ins,
- node->no_quota);
+ ref->level, &ins);
} else if (node->action == BTRFS_ADD_DELAYED_REF) {
- ret = __btrfs_inc_extent_ref(trans, root, node->bytenr,
- node->num_bytes, parent, ref_root,
- ref->level, 0, 1, node->no_quota,
+ ret = __btrfs_inc_extent_ref(trans, root, node,
+ parent, ref_root,
+ ref->level, 0, 1,
extent_op);
} else if (node->action == BTRFS_DROP_DELAYED_REF) {
- ret = __btrfs_free_extent(trans, root, node->bytenr,
- node->num_bytes, parent, ref_root,
- ref->level, 0, 1, extent_op,
- node->no_quota);
+ ret = __btrfs_free_extent(trans, root, node,
+ parent, ref_root,
+ ref->level, 0, 1, extent_op);
} else {
BUG();
}
@@ -2307,6 +2402,11 @@ static int run_one_delayed_ref(struct btrfs_trans_handle *trans,
node->num_bytes);
}
}
+
+ /* Also free its reserved qgroup space */
+ btrfs_qgroup_free_delayed_ref(root->fs_info,
+ head->qgroup_ref_root,
+ head->qgroup_reserved);
return ret;
}
@@ -2323,28 +2423,27 @@ static int run_one_delayed_ref(struct btrfs_trans_handle *trans,
return ret;
}
-static noinline struct btrfs_delayed_ref_node *
+static inline struct btrfs_delayed_ref_node *
select_delayed_ref(struct btrfs_delayed_ref_head *head)
{
- struct rb_node *node;
- struct btrfs_delayed_ref_node *ref, *last = NULL;;
+ struct btrfs_delayed_ref_node *ref;
+
+ if (list_empty(&head->ref_list))
+ return NULL;
/*
- * select delayed ref of type BTRFS_ADD_DELAYED_REF first.
- * this prevents ref count from going down to zero when
- * there still are pending delayed ref.
+ * Select a delayed ref of type BTRFS_ADD_DELAYED_REF first.
+ * This is to prevent a ref count from going down to zero, which deletes
+ * the extent item from the extent tree, when there still are references
+ * to add, which would fail because they would not find the extent item.
*/
- node = rb_first(&head->ref_root);
- while (node) {
- ref = rb_entry(node, struct btrfs_delayed_ref_node,
- rb_node);
+ list_for_each_entry(ref, &head->ref_list, list) {
if (ref->action == BTRFS_ADD_DELAYED_REF)
return ref;
- else if (last == NULL)
- last = ref;
- node = rb_next(node);
}
- return last;
+
+ return list_entry(head->ref_list.next, struct btrfs_delayed_ref_node,
+ list);
}
/*
@@ -2402,6 +2501,11 @@ static noinline int __btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
* and then it being added back again before the drop can
* finish. If we merged anything we need to re-loop so we can
* get a good ref.
+ * Or we can get node references of the same type that weren't
+ * merged when created due to bumps in the tree mod seq, and
+ * we need to merge them to prevent adding an inline extent
+ * backref before dropping it (triggering a BUG_ON at
+ * insert_inline_extent_backref()).
*/
spin_lock(&locked_ref->lock);
btrfs_merge_delayed_refs(trans, fs_info, delayed_refs,
@@ -2482,7 +2586,7 @@ static noinline int __btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
spin_unlock(&locked_ref->lock);
spin_lock(&delayed_refs->lock);
spin_lock(&locked_ref->lock);
- if (rb_first(&locked_ref->ref_root) ||
+ if (!list_empty(&locked_ref->ref_list) ||
locked_ref->extent_op) {
spin_unlock(&locked_ref->lock);
spin_unlock(&delayed_refs->lock);
@@ -2496,7 +2600,7 @@ static noinline int __btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
} else {
actual_count++;
ref->in_tree = 0;
- rb_erase(&ref->rb_node, &locked_ref->ref_root);
+ list_del(&ref->list);
}
atomic_dec(&delayed_refs->num_entries);
@@ -2800,6 +2904,7 @@ int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
struct btrfs_delayed_ref_head *head;
int ret;
int run_all = count == (unsigned long)-1;
+ bool can_flush_pending_bgs = trans->can_flush_pending_bgs;
/* We'll clean this up in btrfs_cleanup_transaction */
if (trans->aborted)
@@ -2816,6 +2921,7 @@ again:
#ifdef SCRAMBLE_DELAYED_REFS
delayed_refs->run_delayed_start = find_middle(&delayed_refs->root);
#endif
+ trans->can_flush_pending_bgs = false;
ret = __btrfs_run_delayed_refs(trans, root, count);
if (ret < 0) {
btrfs_abort_transaction(trans, root, ret);
@@ -2864,10 +2970,8 @@ again:
goto again;
}
out:
- ret = btrfs_delayed_qgroup_accounting(trans, root->fs_info);
- if (ret)
- return ret;
assert_qgroups_uptodate(trans);
+ trans->can_flush_pending_bgs = can_flush_pending_bgs;
return 0;
}
@@ -2905,7 +3009,6 @@ static noinline int check_delayed_ref(struct btrfs_trans_handle *trans,
struct btrfs_delayed_ref_node *ref;
struct btrfs_delayed_data_ref *data_ref;
struct btrfs_delayed_ref_root *delayed_refs;
- struct rb_node *node;
int ret = 0;
delayed_refs = &trans->transaction->delayed_refs;
@@ -2934,11 +3037,7 @@ static noinline int check_delayed_ref(struct btrfs_trans_handle *trans,
spin_unlock(&delayed_refs->lock);
spin_lock(&head->lock);
- node = rb_first(&head->ref_root);
- while (node) {
- ref = rb_entry(node, struct btrfs_delayed_ref_node, rb_node);
- node = rb_next(node);
-
+ list_for_each_entry(ref, &head->ref_list, list) {
/* If it's a shared ref we know a cross reference exists */
if (ref->type != BTRFS_EXTENT_DATA_REF_KEY) {
ret = 1;
@@ -3086,7 +3185,7 @@ static int __btrfs_mod_ref(struct btrfs_trans_handle *trans,
int level;
int ret = 0;
int (*process_func)(struct btrfs_trans_handle *, struct btrfs_root *,
- u64, u64, u64, u64, u64, u64, int);
+ u64, u64, u64, u64, u64, u64);
if (btrfs_test_is_dummy_root(root))
@@ -3127,15 +3226,14 @@ static int __btrfs_mod_ref(struct btrfs_trans_handle *trans,
key.offset -= btrfs_file_extent_offset(buf, fi);
ret = process_func(trans, root, bytenr, num_bytes,
parent, ref_root, key.objectid,
- key.offset, 1);
+ key.offset);
if (ret)
goto fail;
} else {
bytenr = btrfs_node_blockptr(buf, i);
num_bytes = root->nodesize;
ret = process_func(trans, root, bytenr, num_bytes,
- parent, ref_root, level - 1, 0,
- 1);
+ parent, ref_root, level - 1, 0);
if (ret)
goto fail;
}
@@ -3316,6 +3414,15 @@ again:
spin_unlock(&block_group->lock);
/*
+ * We hit an ENOSPC when setting up the cache in this transaction, just
+ * skip doing the setup, we've already cleared the cache so we're safe.
+ */
+ if (test_bit(BTRFS_TRANS_CACHE_ENOSPC, &trans->transaction->flags)) {
+ ret = -ENOSPC;
+ goto out_put;
+ }
+
+ /*
* Try to preallocate enough space based on how big the block group is.
* Keep in mind this has to include any pinned space which could end up
* taking up quite a bit since it's not folded into the other space
@@ -3328,16 +3435,26 @@ again:
num_pages *= 16;
num_pages *= PAGE_CACHE_SIZE;
- ret = btrfs_check_data_free_space(inode, num_pages, num_pages);
+ ret = btrfs_check_data_free_space(inode, 0, num_pages);
if (ret)
goto out_put;
ret = btrfs_prealloc_file_range_trans(inode, trans, 0, 0, num_pages,
num_pages, num_pages,
&alloc_hint);
+ /*
+ * Our cache requires contiguous chunks so that we don't modify a bunch
+ * of metadata or split extents when writing the cache out, which means
+ * we can enospc if we are heavily fragmented in addition to just normal
+ * out of space conditions. So if we hit this just skip setting up any
+ * other block groups for this transaction, maybe we'll unpin enough
+ * space the next time around.
+ */
if (!ret)
dcs = BTRFS_DC_SETUP;
- btrfs_free_reserved_data_space(inode, num_pages);
+ else if (ret == -ENOSPC)
+ set_bit(BTRFS_TRANS_CACHE_ENOSPC, &trans->transaction->flags);
+ btrfs_free_reserved_data_space(inode, 0, num_pages);
out_put:
iput(inode);
@@ -3693,7 +3810,8 @@ static int update_space_info(struct btrfs_fs_info *info, u64 flags,
found->disk_total += total_bytes * factor;
found->bytes_used += bytes_used;
found->disk_used += bytes_used * factor;
- found->full = 0;
+ if (total_bytes > 0)
+ found->full = 0;
spin_unlock(&found->lock);
*space_info = found;
return 0;
@@ -3722,6 +3840,7 @@ static int update_space_info(struct btrfs_fs_info *info, u64 flags,
found->bytes_readonly = 0;
found->bytes_may_use = 0;
found->full = 0;
+ found->max_extent_size = 0;
found->force_alloc = CHUNK_ALLOC_NO_FORCE;
found->chunk_alloc = 0;
found->flush = 0;
@@ -3798,7 +3917,8 @@ static u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags)
{
u64 num_devices = root->fs_info->fs_devices->rw_devices;
u64 target;
- u64 tmp;
+ u64 raid_type;
+ u64 allowed = 0;
/*
* see if restripe for this chunk_type is in progress, if so
@@ -3816,31 +3936,26 @@ static u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags)
spin_unlock(&root->fs_info->balance_lock);
/* First, mask out the RAID levels which aren't possible */
- if (num_devices == 1)
- flags &= ~(BTRFS_BLOCK_GROUP_RAID1 | BTRFS_BLOCK_GROUP_RAID0 |
- BTRFS_BLOCK_GROUP_RAID5);
- if (num_devices < 3)
- flags &= ~BTRFS_BLOCK_GROUP_RAID6;
- if (num_devices < 4)
- flags &= ~BTRFS_BLOCK_GROUP_RAID10;
-
- tmp = flags & (BTRFS_BLOCK_GROUP_DUP | BTRFS_BLOCK_GROUP_RAID0 |
- BTRFS_BLOCK_GROUP_RAID1 | BTRFS_BLOCK_GROUP_RAID5 |
- BTRFS_BLOCK_GROUP_RAID6 | BTRFS_BLOCK_GROUP_RAID10);
- flags &= ~tmp;
-
- if (tmp & BTRFS_BLOCK_GROUP_RAID6)
- tmp = BTRFS_BLOCK_GROUP_RAID6;
- else if (tmp & BTRFS_BLOCK_GROUP_RAID5)
- tmp = BTRFS_BLOCK_GROUP_RAID5;
- else if (tmp & BTRFS_BLOCK_GROUP_RAID10)
- tmp = BTRFS_BLOCK_GROUP_RAID10;
- else if (tmp & BTRFS_BLOCK_GROUP_RAID1)
- tmp = BTRFS_BLOCK_GROUP_RAID1;
- else if (tmp & BTRFS_BLOCK_GROUP_RAID0)
- tmp = BTRFS_BLOCK_GROUP_RAID0;
-
- return extended_to_chunk(flags | tmp);
+ for (raid_type = 0; raid_type < BTRFS_NR_RAID_TYPES; raid_type++) {
+ if (num_devices >= btrfs_raid_array[raid_type].devs_min)
+ allowed |= btrfs_raid_group[raid_type];
+ }
+ allowed &= flags;
+
+ if (allowed & BTRFS_BLOCK_GROUP_RAID6)
+ allowed = BTRFS_BLOCK_GROUP_RAID6;
+ else if (allowed & BTRFS_BLOCK_GROUP_RAID5)
+ allowed = BTRFS_BLOCK_GROUP_RAID5;
+ else if (allowed & BTRFS_BLOCK_GROUP_RAID10)
+ allowed = BTRFS_BLOCK_GROUP_RAID10;
+ else if (allowed & BTRFS_BLOCK_GROUP_RAID1)
+ allowed = BTRFS_BLOCK_GROUP_RAID1;
+ else if (allowed & BTRFS_BLOCK_GROUP_RAID0)
+ allowed = BTRFS_BLOCK_GROUP_RAID0;
+
+ flags &= ~BTRFS_BLOCK_GROUP_PROFILE_MASK;
+
+ return extended_to_chunk(flags | allowed);
}
static u64 get_alloc_profile(struct btrfs_root *root, u64 orig_flags)
@@ -3879,11 +3994,7 @@ u64 btrfs_get_alloc_profile(struct btrfs_root *root, int data)
return ret;
}
-/*
- * This will check the space that the inode allocates from to make sure we have
- * enough space for bytes.
- */
-int btrfs_check_data_free_space(struct inode *inode, u64 bytes, u64 write_bytes)
+int btrfs_alloc_data_chunk_ondemand(struct inode *inode, u64 bytes)
{
struct btrfs_space_info *data_sinfo;
struct btrfs_root *root = BTRFS_I(inode)->root;
@@ -3975,21 +4086,28 @@ commit_trans:
!atomic_read(&root->fs_info->open_ioctl_trans)) {
need_commit--;
+ if (need_commit > 0) {
+ btrfs_start_delalloc_roots(fs_info, 0, -1);
+ btrfs_wait_ordered_roots(fs_info, -1);
+ }
+
trans = btrfs_join_transaction(root);
if (IS_ERR(trans))
return PTR_ERR(trans);
if (have_pinned_space >= 0 ||
- trans->transaction->have_free_bgs ||
+ test_bit(BTRFS_TRANS_HAVE_FREE_BGS,
+ &trans->transaction->flags) ||
need_commit > 0) {
ret = btrfs_commit_transaction(trans, root);
if (ret)
return ret;
/*
- * make sure that all running delayed iput are
- * done
+ * The cleaner kthread might still be doing iput
+ * operations. Wait for it to finish so that
+ * more space is released.
*/
- down_write(&root->fs_info->delayed_iput_sem);
- up_write(&root->fs_info->delayed_iput_sem);
+ mutex_lock(&root->fs_info->cleaner_delayed_iput_mutex);
+ mutex_unlock(&root->fs_info->cleaner_delayed_iput_mutex);
goto again;
} else {
btrfs_end_transaction(trans, root);
@@ -4001,38 +4119,86 @@ commit_trans:
data_sinfo->flags, bytes, 1);
return -ENOSPC;
}
- ret = btrfs_qgroup_reserve(root, write_bytes);
- if (ret)
- goto out;
data_sinfo->bytes_may_use += bytes;
trace_btrfs_space_reservation(root->fs_info, "space_info",
data_sinfo->flags, bytes, 1);
-out:
spin_unlock(&data_sinfo->lock);
return ret;
}
/*
- * Called if we need to clear a data reservation for this inode.
+ * New check_data_free_space() with ability for precious data reservation
+ * Will replace old btrfs_check_data_free_space(), but for patch split,
+ * add a new function first and then replace it.
*/
-void btrfs_free_reserved_data_space(struct inode *inode, u64 bytes)
+int btrfs_check_data_free_space(struct inode *inode, u64 start, u64 len)
+{
+ struct btrfs_root *root = BTRFS_I(inode)->root;
+ int ret;
+
+ /* align the range */
+ len = round_up(start + len, root->sectorsize) -
+ round_down(start, root->sectorsize);
+ start = round_down(start, root->sectorsize);
+
+ ret = btrfs_alloc_data_chunk_ondemand(inode, len);
+ if (ret < 0)
+ return ret;
+
+ /*
+ * Use new btrfs_qgroup_reserve_data to reserve precious data space
+ *
+ * TODO: Find a good method to avoid reserve data space for NOCOW
+ * range, but don't impact performance on quota disable case.
+ */
+ ret = btrfs_qgroup_reserve_data(inode, start, len);
+ return ret;
+}
+
+/*
+ * Called if we need to clear a data reservation for this inode
+ * Normally in a error case.
+ *
+ * This one will *NOT* use accurate qgroup reserved space API, just for case
+ * which we can't sleep and is sure it won't affect qgroup reserved space.
+ * Like clear_bit_hook().
+ */
+void btrfs_free_reserved_data_space_noquota(struct inode *inode, u64 start,
+ u64 len)
{
struct btrfs_root *root = BTRFS_I(inode)->root;
struct btrfs_space_info *data_sinfo;
- /* make sure bytes are sectorsize aligned */
- bytes = ALIGN(bytes, root->sectorsize);
+ /* Make sure the range is aligned to sectorsize */
+ len = round_up(start + len, root->sectorsize) -
+ round_down(start, root->sectorsize);
+ start = round_down(start, root->sectorsize);
data_sinfo = root->fs_info->data_sinfo;
spin_lock(&data_sinfo->lock);
- WARN_ON(data_sinfo->bytes_may_use < bytes);
- data_sinfo->bytes_may_use -= bytes;
+ if (WARN_ON(data_sinfo->bytes_may_use < len))
+ data_sinfo->bytes_may_use = 0;
+ else
+ data_sinfo->bytes_may_use -= len;
trace_btrfs_space_reservation(root->fs_info, "space_info",
- data_sinfo->flags, bytes, 0);
+ data_sinfo->flags, len, 0);
spin_unlock(&data_sinfo->lock);
}
+/*
+ * Called if we need to clear a data reservation for this inode
+ * Normally in a error case.
+ *
+ * This one will handle the per-indoe data rsv map for accurate reserved
+ * space framework.
+ */
+void btrfs_free_reserved_data_space(struct inode *inode, u64 start, u64 len)
+{
+ btrfs_free_reserved_data_space_noquota(inode, start, len);
+ btrfs_qgroup_free_data(inode, start, len);
+}
+
static void force_metadata_allocation(struct btrfs_fs_info *info)
{
struct list_head *head = &info->space_info;
@@ -4088,7 +4254,7 @@ static int should_alloc_chunk(struct btrfs_root *root,
return 1;
}
-static u64 get_system_chunk_thresh(struct btrfs_root *root, u64 type)
+static u64 get_profile_num_devs(struct btrfs_root *root, u64 type)
{
u64 num_dev;
@@ -4102,24 +4268,43 @@ static u64 get_system_chunk_thresh(struct btrfs_root *root, u64 type)
else
num_dev = 1; /* DUP or single */
- /* metadata for updaing devices and chunk tree */
- return btrfs_calc_trans_metadata_size(root, num_dev + 1);
+ return num_dev;
}
-static void check_system_chunk(struct btrfs_trans_handle *trans,
- struct btrfs_root *root, u64 type)
+/*
+ * If @is_allocation is true, reserve space in the system space info necessary
+ * for allocating a chunk, otherwise if it's false, reserve space necessary for
+ * removing a chunk.
+ */
+void check_system_chunk(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root,
+ u64 type)
{
struct btrfs_space_info *info;
u64 left;
u64 thresh;
+ int ret = 0;
+ u64 num_devs;
+
+ /*
+ * Needed because we can end up allocating a system chunk and for an
+ * atomic and race free space reservation in the chunk block reserve.
+ */
+ ASSERT(mutex_is_locked(&root->fs_info->chunk_mutex));
info = __find_space_info(root->fs_info, BTRFS_BLOCK_GROUP_SYSTEM);
spin_lock(&info->lock);
left = info->total_bytes - info->bytes_used - info->bytes_pinned -
- info->bytes_reserved - info->bytes_readonly;
+ info->bytes_reserved - info->bytes_readonly -
+ info->bytes_may_use;
spin_unlock(&info->lock);
- thresh = get_system_chunk_thresh(root, type);
+ num_devs = get_profile_num_devs(root, type);
+
+ /* num_devs device items to update and 1 chunk item to add or remove */
+ thresh = btrfs_calc_trunc_metadata_size(root, num_devs) +
+ btrfs_calc_trans_metadata_size(root, 1);
+
if (left < thresh && btrfs_test_opt(root, ENOSPC_DEBUG)) {
btrfs_info(root->fs_info, "left=%llu, need=%llu, flags=%llu",
left, thresh, type);
@@ -4130,7 +4315,21 @@ static void check_system_chunk(struct btrfs_trans_handle *trans,
u64 flags;
flags = btrfs_get_alloc_profile(root->fs_info->chunk_root, 0);
- btrfs_alloc_chunk(trans, root, flags);
+ /*
+ * Ignore failure to create system chunk. We might end up not
+ * needing it, as we might not need to COW all nodes/leafs from
+ * the paths we visit in the chunk tree (they were already COWed
+ * or created in the current transaction for example).
+ */
+ ret = btrfs_alloc_chunk(trans, root, flags);
+ }
+
+ if (!ret) {
+ ret = btrfs_block_rsv_add(root->fs_info->chunk_root,
+ &root->fs_info->chunk_block_rsv,
+ thresh, BTRFS_RESERVE_NO_FLUSH);
+ if (!ret)
+ trans->chunk_bytes_reserved += thresh;
}
}
@@ -4235,6 +4434,25 @@ out:
space_info->chunk_alloc = 0;
spin_unlock(&space_info->lock);
mutex_unlock(&fs_info->chunk_mutex);
+ /*
+ * When we allocate a new chunk we reserve space in the chunk block
+ * reserve to make sure we can COW nodes/leafs in the chunk tree or
+ * add new nodes/leafs to it if we end up needing to do it when
+ * inserting the chunk item and updating device items as part of the
+ * second phase of chunk allocation, performed by
+ * btrfs_finish_chunk_alloc(). So make sure we don't accumulate a
+ * large number of new block groups to create in our transaction
+ * handle's new_bgs list to avoid exhausting the chunk block reserve
+ * in extreme cases - like having a single transaction create many new
+ * block groups when starting to write out the free space caches of all
+ * the block groups that were made dirty during the lifetime of the
+ * transaction.
+ */
+ if (trans->can_flush_pending_bgs &&
+ trans->chunk_bytes_reserved >= (2 * 1024 * 1024ull)) {
+ btrfs_create_pending_block_groups(trans, trans->root);
+ btrfs_trans_release_chunk_metadata(trans);
+ }
return ret;
}
@@ -4812,13 +5030,9 @@ static struct btrfs_block_rsv *get_block_rsv(
{
struct btrfs_block_rsv *block_rsv = NULL;
- if (test_bit(BTRFS_ROOT_REF_COWS, &root->state))
- block_rsv = trans->block_rsv;
-
- if (root == root->fs_info->csum_root && trans->adding_csums)
- block_rsv = trans->block_rsv;
-
- if (root == root->fs_info->uuid_root)
+ if (test_bit(BTRFS_ROOT_REF_COWS, &root->state) ||
+ (root == root->fs_info->csum_root && trans->adding_csums) ||
+ (root == root->fs_info->uuid_root))
block_rsv = trans->block_rsv;
if (!block_rsv)
@@ -5188,6 +5402,24 @@ void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans,
trans->bytes_reserved = 0;
}
+/*
+ * To be called after all the new block groups attached to the transaction
+ * handle have been created (btrfs_create_pending_block_groups()).
+ */
+void btrfs_trans_release_chunk_metadata(struct btrfs_trans_handle *trans)
+{
+ struct btrfs_fs_info *fs_info = trans->root->fs_info;
+
+ if (!trans->chunk_bytes_reserved)
+ return;
+
+ WARN_ON_ONCE(!list_empty(&trans->new_bgs));
+
+ block_rsv_release_bytes(fs_info, &fs_info->chunk_block_rsv, NULL,
+ trans->chunk_bytes_reserved);
+ trans->chunk_bytes_reserved = 0;
+}
+
/* Can only return 0 or -ENOSPC */
int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans,
struct inode *inode)
@@ -5243,7 +5475,7 @@ int btrfs_subvolume_reserve_metadata(struct btrfs_root *root,
if (root->fs_info->quota_enabled) {
/* One for parent inode, two for dir entries */
num_bytes = 3 * root->nodesize;
- ret = btrfs_qgroup_reserve(root, num_bytes);
+ ret = btrfs_qgroup_reserve_meta(root, num_bytes);
if (ret)
return ret;
} else {
@@ -5261,10 +5493,8 @@ int btrfs_subvolume_reserve_metadata(struct btrfs_root *root,
if (ret == -ENOSPC && use_global_rsv)
ret = btrfs_block_rsv_migrate(global_rsv, rsv, num_bytes);
- if (ret) {
- if (*qgroup_reserved)
- btrfs_qgroup_free(root, *qgroup_reserved);
- }
+ if (ret && *qgroup_reserved)
+ btrfs_qgroup_free_meta(root, *qgroup_reserved);
return ret;
}
@@ -5425,15 +5655,15 @@ int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes)
spin_unlock(&BTRFS_I(inode)->lock);
if (root->fs_info->quota_enabled) {
- ret = btrfs_qgroup_reserve(root, nr_extents * root->nodesize);
+ ret = btrfs_qgroup_reserve_meta(root,
+ nr_extents * root->nodesize);
if (ret)
goto out_fail;
}
ret = reserve_metadata_bytes(root, block_rsv, to_reserve, flush);
if (unlikely(ret)) {
- if (root->fs_info->quota_enabled)
- btrfs_qgroup_free(root, nr_extents * root->nodesize);
+ btrfs_qgroup_free_meta(root, nr_extents * root->nodesize);
goto out_fail;
}
@@ -5556,41 +5786,48 @@ void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes)
}
/**
- * btrfs_delalloc_reserve_space - reserve data and metadata space for delalloc
+ * btrfs_delalloc_reserve_space - reserve data and metadata space for
+ * delalloc
* @inode: inode we're writing to
- * @num_bytes: the number of bytes we want to allocate
+ * @start: start range we are writing to
+ * @len: how long the range we are writing to
+ *
+ * TODO: This function will finally replace old btrfs_delalloc_reserve_space()
*
* This will do the following things
*
- * o reserve space in the data space info for num_bytes
- * o reserve space in the metadata space info based on number of outstanding
+ * o reserve space in data space info for num bytes
+ * and reserve precious corresponding qgroup space
+ * (Done in check_data_free_space)
+ *
+ * o reserve space for metadata space, based on the number of outstanding
* extents and how much csums will be needed
- * o add to the inodes ->delalloc_bytes
+ * also reserve metadata space in a per root over-reserve method.
+ * o add to the inodes->delalloc_bytes
* o add it to the fs_info's delalloc inodes list.
+ * (Above 3 all done in delalloc_reserve_metadata)
*
- * This will return 0 for success and -ENOSPC if there is no space left.
+ * Return 0 for success
+ * Return <0 for error(-ENOSPC or -EQUOT)
*/
-int btrfs_delalloc_reserve_space(struct inode *inode, u64 num_bytes)
+int btrfs_delalloc_reserve_space(struct inode *inode, u64 start, u64 len)
{
int ret;
- ret = btrfs_check_data_free_space(inode, num_bytes, num_bytes);
- if (ret)
- return ret;
-
- ret = btrfs_delalloc_reserve_metadata(inode, num_bytes);
- if (ret) {
- btrfs_free_reserved_data_space(inode, num_bytes);
+ ret = btrfs_check_data_free_space(inode, start, len);
+ if (ret < 0)
return ret;
- }
-
- return 0;
+ ret = btrfs_delalloc_reserve_metadata(inode, len);
+ if (ret < 0)
+ btrfs_free_reserved_data_space(inode, start, len);
+ return ret;
}
/**
* btrfs_delalloc_release_space - release data and metadata space for delalloc
* @inode: inode we're releasing space for
- * @num_bytes: the number of bytes we want to free up
+ * @start: start position of the space already reserved
+ * @len: the len of the space already reserved
*
* This must be matched with a call to btrfs_delalloc_reserve_space. This is
* called in the case that we don't need the metadata AND data reservations
@@ -5599,11 +5836,12 @@ int btrfs_delalloc_reserve_space(struct inode *inode, u64 num_bytes)
* This function will release the metadata space that was not used and will
* decrement ->delalloc_bytes and remove it from the fs_info delalloc_inodes
* list if there are no delalloc bytes left.
+ * Also it will handle the qgroup reserved space.
*/
-void btrfs_delalloc_release_space(struct inode *inode, u64 num_bytes)
+void btrfs_delalloc_release_space(struct inode *inode, u64 start, u64 len)
{
- btrfs_delalloc_release_metadata(inode, num_bytes);
- btrfs_free_reserved_data_space(inode, num_bytes);
+ btrfs_delalloc_release_metadata(inode, len);
+ btrfs_free_reserved_data_space(inode, start, len);
}
static int update_block_group(struct btrfs_trans_handle *trans,
@@ -5680,19 +5918,6 @@ static int update_block_group(struct btrfs_trans_handle *trans,
set_extent_dirty(info->pinned_extents,
bytenr, bytenr + num_bytes - 1,
GFP_NOFS | __GFP_NOFAIL);
- /*
- * No longer have used bytes in this block group, queue
- * it for deletion.
- */
- if (old_val == 0) {
- spin_lock(&info->unused_bgs_lock);
- if (list_empty(&cache->bg_list)) {
- btrfs_get_block_group(cache);
- list_add_tail(&cache->bg_list,
- &info->unused_bgs);
- }
- spin_unlock(&info->unused_bgs_lock);
- }
}
spin_lock(&trans->transaction->dirty_bgs_lock);
@@ -5704,6 +5929,22 @@ static int update_block_group(struct btrfs_trans_handle *trans,
}
spin_unlock(&trans->transaction->dirty_bgs_lock);
+ /*
+ * No longer have used bytes in this block group, queue it for
+ * deletion. We do this after adding the block group to the
+ * dirty list to avoid races between cleaner kthread and space
+ * cache writeout.
+ */
+ if (!alloc && old_val == 0) {
+ spin_lock(&info->unused_bgs_lock);
+ if (list_empty(&cache->bg_list)) {
+ btrfs_get_block_group(cache);
+ list_add_tail(&cache->bg_list,
+ &info->unused_bgs);
+ }
+ spin_unlock(&info->unused_bgs_lock);
+ }
+
btrfs_put_block_group(cache);
total -= num_bytes;
bytenr += num_bytes;
@@ -5968,6 +6209,34 @@ void btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans,
update_global_block_rsv(fs_info);
}
+/*
+ * Returns the free cluster for the given space info and sets empty_cluster to
+ * what it should be based on the mount options.
+ */
+static struct btrfs_free_cluster *
+fetch_cluster_info(struct btrfs_root *root, struct btrfs_space_info *space_info,
+ u64 *empty_cluster)
+{
+ struct btrfs_free_cluster *ret = NULL;
+ bool ssd = btrfs_test_opt(root, SSD);
+
+ *empty_cluster = 0;
+ if (btrfs_mixed_space_info(space_info))
+ return ret;
+
+ if (ssd)
+ *empty_cluster = 2 * 1024 * 1024;
+ if (space_info->flags & BTRFS_BLOCK_GROUP_METADATA) {
+ ret = &root->fs_info->meta_alloc_cluster;
+ if (!ssd)
+ *empty_cluster = 64 * 1024;
+ } else if ((space_info->flags & BTRFS_BLOCK_GROUP_DATA) && ssd) {
+ ret = &root->fs_info->data_alloc_cluster;
+ }
+
+ return ret;
+}
+
static int unpin_extent_range(struct btrfs_root *root, u64 start, u64 end,
const bool return_free_space)
{
@@ -5975,7 +6244,10 @@ static int unpin_extent_range(struct btrfs_root *root, u64 start, u64 end,
struct btrfs_block_group_cache *cache = NULL;
struct btrfs_space_info *space_info;
struct btrfs_block_rsv *global_rsv = &fs_info->global_block_rsv;
+ struct btrfs_free_cluster *cluster = NULL;
u64 len;
+ u64 total_unpinned = 0;
+ u64 empty_cluster = 0;
bool readonly;
while (start <= end) {
@@ -5984,8 +6256,14 @@ static int unpin_extent_range(struct btrfs_root *root, u64 start, u64 end,
start >= cache->key.objectid + cache->key.offset) {
if (cache)
btrfs_put_block_group(cache);
+ total_unpinned = 0;
cache = btrfs_lookup_block_group(fs_info, start);
BUG_ON(!cache); /* Logic error */
+
+ cluster = fetch_cluster_info(root,
+ cache->space_info,
+ &empty_cluster);
+ empty_cluster <<= 1;
}
len = cache->key.objectid + cache->key.offset - start;
@@ -5998,12 +6276,27 @@ static int unpin_extent_range(struct btrfs_root *root, u64 start, u64 end,
}
start += len;
+ total_unpinned += len;
space_info = cache->space_info;
+ /*
+ * If this space cluster has been marked as fragmented and we've
+ * unpinned enough in this block group to potentially allow a
+ * cluster to be created inside of it go ahead and clear the
+ * fragmented check.
+ */
+ if (cluster && cluster->fragmented &&
+ total_unpinned > empty_cluster) {
+ spin_lock(&cluster->lock);
+ cluster->fragmented = 0;
+ spin_unlock(&cluster->lock);
+ }
+
spin_lock(&space_info->lock);
spin_lock(&cache->lock);
cache->pinned -= len;
space_info->bytes_pinned -= len;
+ space_info->max_extent_size = 0;
percpu_counter_add(&space_info->total_bytes_pinned, -len);
if (cache->ro) {
space_info->bytes_readonly += len;
@@ -6034,20 +6327,19 @@ int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
struct btrfs_root *root)
{
struct btrfs_fs_info *fs_info = root->fs_info;
+ struct btrfs_block_group_cache *block_group, *tmp;
+ struct list_head *deleted_bgs;
struct extent_io_tree *unpin;
u64 start;
u64 end;
int ret;
- if (trans->aborted)
- return 0;
-
if (fs_info->pinned_extents == &fs_info->freed_extents[0])
unpin = &fs_info->freed_extents[1];
else
unpin = &fs_info->freed_extents[0];
- while (1) {
+ while (!trans->aborted) {
mutex_lock(&fs_info->unused_bg_unpin_mutex);
ret = find_first_extent_bit(unpin, 0, &start, &end,
EXTENT_DIRTY, NULL);
@@ -6066,6 +6358,34 @@ int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
cond_resched();
}
+ /*
+ * Transaction is finished. We don't need the lock anymore. We
+ * do need to clean up the block groups in case of a transaction
+ * abort.
+ */
+ deleted_bgs = &trans->transaction->deleted_bgs;
+ list_for_each_entry_safe(block_group, tmp, deleted_bgs, bg_list) {
+ u64 trimmed = 0;
+
+ ret = -EROFS;
+ if (!trans->aborted)
+ ret = btrfs_discard_extent(root,
+ block_group->key.objectid,
+ block_group->key.offset,
+ &trimmed);
+
+ list_del_init(&block_group->bg_list);
+ btrfs_put_block_group_trimming(block_group);
+ btrfs_put_block_group(block_group);
+
+ if (ret) {
+ const char *errstr = btrfs_decode_error(ret);
+ btrfs_warn(fs_info,
+ "Discard failed while removing blockgroup: errno=%d %s\n",
+ ret, errstr);
+ }
+ }
+
return 0;
}
@@ -6092,11 +6412,10 @@ static void add_pinned_bytes(struct btrfs_fs_info *fs_info, u64 num_bytes,
static int __btrfs_free_extent(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
- u64 bytenr, u64 num_bytes, u64 parent,
+ struct btrfs_delayed_ref_node *node, u64 parent,
u64 root_objectid, u64 owner_objectid,
u64 owner_offset, int refs_to_drop,
- struct btrfs_delayed_extent_op *extent_op,
- int no_quota)
+ struct btrfs_delayed_extent_op *extent_op)
{
struct btrfs_key key;
struct btrfs_path *path;
@@ -6112,14 +6431,12 @@ static int __btrfs_free_extent(struct btrfs_trans_handle *trans,
int num_to_del = 1;
u32 item_size;
u64 refs;
+ u64 bytenr = node->bytenr;
+ u64 num_bytes = node->num_bytes;
int last_ref = 0;
- enum btrfs_qgroup_operation_type type = BTRFS_QGROUP_OPER_SUB_EXCL;
bool skinny_metadata = btrfs_fs_incompat(root->fs_info,
SKINNY_METADATA);
- if (!info->quota_enabled || !is_fstree(root_objectid))
- no_quota = 1;
-
path = btrfs_alloc_path();
if (!path)
return -ENOMEM;
@@ -6294,7 +6611,6 @@ static int __btrfs_free_extent(struct btrfs_trans_handle *trans,
refs -= refs_to_drop;
if (refs > 0) {
- type = BTRFS_QGROUP_OPER_SUB_SHARED;
if (extent_op)
__run_delayed_extent_op(extent_op, leaf, ei);
/*
@@ -6321,7 +6637,7 @@ static int __btrfs_free_extent(struct btrfs_trans_handle *trans,
} else {
if (found_extent) {
BUG_ON(is_data && refs_to_drop !=
- extent_data_ref_count(root, path, iref));
+ extent_data_ref_count(path, iref));
if (iref) {
BUG_ON(path->slots[0] != extent_slot);
} else {
@@ -6356,18 +6672,6 @@ static int __btrfs_free_extent(struct btrfs_trans_handle *trans,
}
btrfs_release_path(path);
- /* Deal with the quota accounting */
- if (!ret && last_ref && !no_quota) {
- int mod_seq = 0;
-
- if (owner_objectid >= BTRFS_FIRST_FREE_OBJECTID &&
- type == BTRFS_QGROUP_OPER_SUB_SHARED)
- mod_seq = 1;
-
- ret = btrfs_qgroup_record_ref(trans, info, root_objectid,
- bytenr, num_bytes, type,
- mod_seq);
- }
out:
btrfs_free_path(path);
return ret;
@@ -6393,7 +6697,7 @@ static noinline int check_ref_cleanup(struct btrfs_trans_handle *trans,
goto out_delayed_unlock;
spin_lock(&head->lock);
- if (rb_first(&head->ref_root))
+ if (!list_empty(&head->ref_list))
goto out;
if (head->extent_op) {
@@ -6458,7 +6762,7 @@ void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
buf->start, buf->len,
parent, root->root_key.objectid,
btrfs_header_level(buf),
- BTRFS_DROP_DELAYED_REF, NULL, 0);
+ BTRFS_DROP_DELAYED_REF, NULL);
BUG_ON(ret); /* -ENOMEM */
}
@@ -6506,7 +6810,7 @@ out:
/* Can return -ENOMEM */
int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root *root,
u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid,
- u64 owner, u64 offset, int no_quota)
+ u64 owner, u64 offset)
{
int ret;
struct btrfs_fs_info *fs_info = root->fs_info;
@@ -6529,13 +6833,13 @@ int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root *root,
ret = btrfs_add_delayed_tree_ref(fs_info, trans, bytenr,
num_bytes,
parent, root_objectid, (int)owner,
- BTRFS_DROP_DELAYED_REF, NULL, no_quota);
+ BTRFS_DROP_DELAYED_REF, NULL);
} else {
ret = btrfs_add_delayed_data_ref(fs_info, trans, bytenr,
num_bytes,
parent, root_objectid, owner,
- offset, BTRFS_DROP_DELAYED_REF,
- NULL, no_quota);
+ offset, 0,
+ BTRFS_DROP_DELAYED_REF, NULL);
}
return ret;
}
@@ -6721,7 +7025,7 @@ static noinline int find_free_extent(struct btrfs_root *orig_root,
struct btrfs_block_group_cache *block_group = NULL;
u64 search_start = 0;
u64 max_extent_size = 0;
- int empty_cluster = 2 * 1024 * 1024;
+ u64 empty_cluster = 0;
struct btrfs_space_info *space_info;
int loop = 0;
int index = __get_raid_index(flags);
@@ -6731,6 +7035,8 @@ static noinline int find_free_extent(struct btrfs_root *orig_root,
bool failed_alloc = false;
bool use_cluster = true;
bool have_caching_bg = false;
+ bool orig_have_caching_bg = false;
+ bool full_search = false;
WARN_ON(num_bytes < root->sectorsize);
ins->type = BTRFS_EXTENT_ITEM_KEY;
@@ -6746,36 +7052,47 @@ static noinline int find_free_extent(struct btrfs_root *orig_root,
}
/*
- * If the space info is for both data and metadata it means we have a
- * small filesystem and we can't use the clustering stuff.
+ * If our free space is heavily fragmented we may not be able to make
+ * big contiguous allocations, so instead of doing the expensive search
+ * for free space, simply return ENOSPC with our max_extent_size so we
+ * can go ahead and search for a more manageable chunk.
+ *
+ * If our max_extent_size is large enough for our allocation simply
+ * disable clustering since we will likely not be able to find enough
+ * space to create a cluster and induce latency trying.
*/
- if (btrfs_mixed_space_info(space_info))
- use_cluster = false;
-
- if (flags & BTRFS_BLOCK_GROUP_METADATA && use_cluster) {
- last_ptr = &root->fs_info->meta_alloc_cluster;
- if (!btrfs_test_opt(root, SSD))
- empty_cluster = 64 * 1024;
- }
-
- if ((flags & BTRFS_BLOCK_GROUP_DATA) && use_cluster &&
- btrfs_test_opt(root, SSD)) {
- last_ptr = &root->fs_info->data_alloc_cluster;
+ if (unlikely(space_info->max_extent_size)) {
+ spin_lock(&space_info->lock);
+ if (space_info->max_extent_size &&
+ num_bytes > space_info->max_extent_size) {
+ ins->offset = space_info->max_extent_size;
+ spin_unlock(&space_info->lock);
+ return -ENOSPC;
+ } else if (space_info->max_extent_size) {
+ use_cluster = false;
+ }
+ spin_unlock(&space_info->lock);
}
+ last_ptr = fetch_cluster_info(orig_root, space_info, &empty_cluster);
if (last_ptr) {
spin_lock(&last_ptr->lock);
if (last_ptr->block_group)
hint_byte = last_ptr->window_start;
+ if (last_ptr->fragmented) {
+ /*
+ * We still set window_start so we can keep track of the
+ * last place we found an allocation to try and save
+ * some time.
+ */
+ hint_byte = last_ptr->window_start;
+ use_cluster = false;
+ }
spin_unlock(&last_ptr->lock);
}
search_start = max(search_start, first_logical_byte(root, 0));
search_start = max(search_start, hint_byte);
-
- if (!last_ptr)
- empty_cluster = 0;
-
if (search_start == hint_byte) {
block_group = btrfs_lookup_block_group(root->fs_info,
search_start);
@@ -6810,6 +7127,8 @@ static noinline int find_free_extent(struct btrfs_root *orig_root,
}
search:
have_caching_bg = false;
+ if (index == 0 || index == __get_raid_index(flags))
+ full_search = true;
down_read(&space_info->groups_sem);
list_for_each_entry(block_group, &space_info->block_groups[index],
list) {
@@ -6843,6 +7162,7 @@ search:
have_block_group:
cached = block_group_cache_done(block_group);
if (unlikely(!cached)) {
+ have_caching_bg = true;
ret = cache_block_group(block_group, 0);
BUG_ON(ret < 0);
ret = 0;
@@ -6857,7 +7177,7 @@ have_block_group:
* Ok we want to try and use the cluster allocator, so
* lets look there
*/
- if (last_ptr) {
+ if (last_ptr && use_cluster) {
struct btrfs_block_group_cache *used_block_group;
unsigned long aligned_cluster;
/*
@@ -6983,6 +7303,16 @@ refill_cluster:
}
unclustered_alloc:
+ /*
+ * We are doing an unclustered alloc, set the fragmented flag so
+ * we don't bother trying to setup a cluster again until we get
+ * more space.
+ */
+ if (unlikely(last_ptr)) {
+ spin_lock(&last_ptr->lock);
+ last_ptr->fragmented = 1;
+ spin_unlock(&last_ptr->lock);
+ }
spin_lock(&block_group->free_space_ctl->tree_lock);
if (cached &&
block_group->free_space_ctl->free_space <
@@ -7015,8 +7345,6 @@ unclustered_alloc:
failed_alloc = true;
goto have_block_group;
} else if (!offset) {
- if (!cached)
- have_caching_bg = true;
goto loop;
}
checks:
@@ -7057,6 +7385,10 @@ loop:
}
up_read(&space_info->groups_sem);
+ if ((loop == LOOP_CACHING_NOWAIT) && have_caching_bg
+ && !orig_have_caching_bg)
+ orig_have_caching_bg = true;
+
if (!ins->objectid && loop >= LOOP_CACHING_WAIT && have_caching_bg)
goto search;
@@ -7073,7 +7405,20 @@ loop:
*/
if (!ins->objectid && loop < LOOP_NO_EMPTY_SIZE) {
index = 0;
- loop++;
+ if (loop == LOOP_CACHING_NOWAIT) {
+ /*
+ * We want to skip the LOOP_CACHING_WAIT step if we
+ * don't have any unached bgs and we've alrelady done a
+ * full search through.
+ */
+ if (orig_have_caching_bg || !full_search)
+ loop = LOOP_CACHING_WAIT;
+ else
+ loop = LOOP_ALLOC_CHUNK;
+ } else {
+ loop++;
+ }
+
if (loop == LOOP_ALLOC_CHUNK) {
struct btrfs_trans_handle *trans;
int exist = 0;
@@ -7091,6 +7436,15 @@ loop:
ret = do_chunk_alloc(trans, root, flags,
CHUNK_ALLOC_FORCE);
+
+ /*
+ * If we can't allocate a new chunk we've already looped
+ * through at least once, move on to the NO_EMPTY_SIZE
+ * case.
+ */
+ if (ret == -ENOSPC)
+ loop = LOOP_NO_EMPTY_SIZE;
+
/*
* Do not bail out on ENOSPC since we
* can do more things.
@@ -7107,6 +7461,15 @@ loop:
}
if (loop == LOOP_NO_EMPTY_SIZE) {
+ /*
+ * Don't loop again if we already have no empty_size and
+ * no empty_cluster.
+ */
+ if (empty_size == 0 &&
+ empty_cluster == 0) {
+ ret = -ENOSPC;
+ goto out;
+ }
empty_size = 0;
empty_cluster = 0;
}
@@ -7115,11 +7478,20 @@ loop:
} else if (!ins->objectid) {
ret = -ENOSPC;
} else if (ins->objectid) {
+ if (!use_cluster && last_ptr) {
+ spin_lock(&last_ptr->lock);
+ last_ptr->window_start = ins->objectid;
+ spin_unlock(&last_ptr->lock);
+ }
ret = 0;
}
out:
- if (ret == -ENOSPC)
+ if (ret == -ENOSPC) {
+ spin_lock(&space_info->lock);
+ space_info->max_extent_size = max_extent_size;
+ spin_unlock(&space_info->lock);
ins->offset = max_extent_size;
+ }
return ret;
}
@@ -7168,7 +7540,7 @@ int btrfs_reserve_extent(struct btrfs_root *root,
u64 empty_size, u64 hint_byte,
struct btrfs_key *ins, int is_data, int delalloc)
{
- bool final_tried = false;
+ bool final_tried = num_bytes == min_alloc_size;
u64 flags;
int ret;
@@ -7303,13 +7675,6 @@ static int alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
btrfs_mark_buffer_dirty(path->nodes[0]);
btrfs_free_path(path);
- /* Always set parent to 0 here since its exclusive anyway. */
- ret = btrfs_qgroup_record_ref(trans, fs_info, root_objectid,
- ins->objectid, ins->offset,
- BTRFS_QGROUP_OPER_ADD_EXCL, 0);
- if (ret)
- return ret;
-
ret = update_block_group(trans, root, ins->objectid, ins->offset, 1);
if (ret) { /* -ENOENT, logic error */
btrfs_err(fs_info, "update block group failed for %llu %llu",
@@ -7324,8 +7689,7 @@ static int alloc_reserved_tree_block(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
u64 parent, u64 root_objectid,
u64 flags, struct btrfs_disk_key *key,
- int level, struct btrfs_key *ins,
- int no_quota)
+ int level, struct btrfs_key *ins)
{
int ret;
struct btrfs_fs_info *fs_info = root->fs_info;
@@ -7391,14 +7755,6 @@ static int alloc_reserved_tree_block(struct btrfs_trans_handle *trans,
btrfs_mark_buffer_dirty(leaf);
btrfs_free_path(path);
- if (!no_quota) {
- ret = btrfs_qgroup_record_ref(trans, fs_info, root_objectid,
- ins->objectid, num_bytes,
- BTRFS_QGROUP_OPER_ADD_EXCL, 0);
- if (ret)
- return ret;
- }
-
ret = update_block_group(trans, root, ins->objectid, root->nodesize,
1);
if (ret) { /* -ENOENT, logic error */
@@ -7414,7 +7770,8 @@ static int alloc_reserved_tree_block(struct btrfs_trans_handle *trans,
int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
u64 root_objectid, u64 owner,
- u64 offset, struct btrfs_key *ins)
+ u64 offset, u64 ram_bytes,
+ struct btrfs_key *ins)
{
int ret;
@@ -7423,7 +7780,8 @@ int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
ret = btrfs_add_delayed_data_ref(root->fs_info, trans, ins->objectid,
ins->offset, 0,
root_objectid, owner, offset,
- BTRFS_ADD_DELAYED_EXTENT, NULL, 0);
+ ram_bytes, BTRFS_ADD_DELAYED_EXTENT,
+ NULL);
return ret;
}
@@ -7566,9 +7924,6 @@ static void unuse_block_rsv(struct btrfs_fs_info *fs_info,
/*
* finds a free extent and does all the dirty work required for allocation
- * returns the key for the extent through ins, and a tree buffer for
- * the first block of the extent through buf.
- *
* returns the tree buffer or an ERR_PTR on error.
*/
struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans,
@@ -7640,7 +7995,7 @@ struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans,
ins.objectid, ins.offset,
parent, root_objectid, level,
BTRFS_ADD_DELAYED_EXTENT,
- extent_op, 0);
+ extent_op);
if (ret)
goto out_free_delayed;
}
@@ -7755,6 +8110,34 @@ reada:
wc->reada_slot = slot;
}
+/*
+ * These may not be seen by the usual inc/dec ref code so we have to
+ * add them here.
+ */
+static int record_one_subtree_extent(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root, u64 bytenr,
+ u64 num_bytes)
+{
+ struct btrfs_qgroup_extent_record *qrecord;
+ struct btrfs_delayed_ref_root *delayed_refs;
+
+ qrecord = kmalloc(sizeof(*qrecord), GFP_NOFS);
+ if (!qrecord)
+ return -ENOMEM;
+
+ qrecord->bytenr = bytenr;
+ qrecord->num_bytes = num_bytes;
+ qrecord->old_roots = NULL;
+
+ delayed_refs = &trans->transaction->delayed_refs;
+ spin_lock(&delayed_refs->lock);
+ if (btrfs_qgroup_insert_dirty_extent(delayed_refs, qrecord))
+ kfree(qrecord);
+ spin_unlock(&delayed_refs->lock);
+
+ return 0;
+}
+
static int account_leaf_items(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct extent_buffer *eb)
@@ -7765,6 +8148,10 @@ static int account_leaf_items(struct btrfs_trans_handle *trans,
struct btrfs_file_extent_item *fi;
u64 bytenr, num_bytes;
+ /* We can be called directly from walk_up_proc() */
+ if (!root->fs_info->quota_enabled)
+ return 0;
+
for (i = 0; i < nr; i++) {
btrfs_item_key_to_cpu(eb, &key, i);
@@ -7784,10 +8171,7 @@ static int account_leaf_items(struct btrfs_trans_handle *trans,
num_bytes = btrfs_file_extent_disk_num_bytes(eb, fi);
- ret = btrfs_qgroup_record_ref(trans, root->fs_info,
- root->objectid,
- bytenr, num_bytes,
- BTRFS_QGROUP_OPER_SUB_SUBTREE, 0);
+ ret = record_one_subtree_extent(trans, root, bytenr, num_bytes);
if (ret)
return ret;
}
@@ -7920,7 +8304,11 @@ walk_down:
child_gen = btrfs_node_ptr_generation(eb, parent_slot);
eb = read_tree_block(root, child_bytenr, child_gen);
- if (!eb || !extent_buffer_uptodate(eb)) {
+ if (IS_ERR(eb)) {
+ ret = PTR_ERR(eb);
+ goto out;
+ } else if (!extent_buffer_uptodate(eb)) {
+ free_extent_buffer(eb);
ret = -EIO;
goto out;
}
@@ -7932,15 +8320,10 @@ walk_down:
btrfs_set_lock_blocking_rw(eb, BTRFS_READ_LOCK);
path->locks[level] = BTRFS_READ_LOCK_BLOCKING;
- ret = btrfs_qgroup_record_ref(trans, root->fs_info,
- root->objectid,
- child_bytenr,
- root->nodesize,
- BTRFS_QGROUP_OPER_SUB_SUBTREE,
- 0);
+ ret = record_one_subtree_extent(trans, root, child_bytenr,
+ root->nodesize);
if (ret)
goto out;
-
}
if (level == 0) {
@@ -8151,7 +8534,9 @@ static noinline int do_walk_down(struct btrfs_trans_handle *trans,
if (reada && level == 1)
reada_walk_down(trans, root, wc, path);
next = read_tree_block(root, bytenr, generation);
- if (!next || !extent_buffer_uptodate(next)) {
+ if (IS_ERR(next)) {
+ return PTR_ERR(next);
+ } else if (!extent_buffer_uptodate(next)) {
free_extent_buffer(next);
return -EIO;
}
@@ -8184,14 +8569,15 @@ skip:
ret = account_shared_subtree(trans, root, next,
generation, level - 1);
if (ret) {
- printk_ratelimited(KERN_ERR "BTRFS: %s Error "
+ btrfs_err_rl(root->fs_info,
+ "Error "
"%d accounting shared subtree. Quota "
- "is out of sync, rescan required.\n",
- root->fs_info->sb->s_id, ret);
+ "is out of sync, rescan required.",
+ ret);
}
}
ret = btrfs_free_extent(trans, root, bytenr, blocksize, parent,
- root->root_key.objectid, level - 1, 0, 0);
+ root->root_key.objectid, level - 1, 0);
BUG_ON(ret); /* -ENOMEM */
}
btrfs_tree_unlock(next);
@@ -8276,10 +8662,11 @@ static noinline int walk_up_proc(struct btrfs_trans_handle *trans,
BUG_ON(ret); /* -ENOMEM */
ret = account_leaf_items(trans, root, eb);
if (ret) {
- printk_ratelimited(KERN_ERR "BTRFS: %s Error "
+ btrfs_err_rl(root->fs_info,
+ "error "
"%d accounting leaf items. Quota "
- "is out of sync, rescan required.\n",
- root->fs_info->sb->s_id, ret);
+ "is out of sync, rescan required.",
+ ret);
}
}
/* make block locked assertion in clean_tree_block happy */
@@ -8533,24 +8920,6 @@ int btrfs_drop_snapshot(struct btrfs_root *root,
goto out_end_trans;
}
- /*
- * Qgroup update accounting is run from
- * delayed ref handling. This usually works
- * out because delayed refs are normally the
- * only way qgroup updates are added. However,
- * we may have added updates during our tree
- * walk so run qgroups here to make sure we
- * don't lose any updates.
- */
- ret = btrfs_delayed_qgroup_accounting(trans,
- root->fs_info);
- if (ret)
- printk_ratelimited(KERN_ERR "BTRFS: Failure %d "
- "running qgroup updates "
- "during snapshot delete. "
- "Quota is out of sync, "
- "rescan required.\n", ret);
-
btrfs_end_transaction_throttle(trans, tree_root);
if (!for_reloc && btrfs_need_cleaner_sleep(root)) {
pr_debug("BTRFS: drop snapshot early exit\n");
@@ -8596,7 +8965,7 @@ int btrfs_drop_snapshot(struct btrfs_root *root,
}
if (test_bit(BTRFS_ROOT_IN_RADIX, &root->state)) {
- btrfs_drop_and_free_fs_root(tree_root->fs_info, root);
+ btrfs_add_dropped_root(trans, root);
} else {
free_extent_buffer(root->node);
free_extent_buffer(root->commit_root);
@@ -8604,14 +8973,6 @@ int btrfs_drop_snapshot(struct btrfs_root *root,
}
root_dropped = true;
out_end_trans:
- ret = btrfs_delayed_qgroup_accounting(trans, tree_root->fs_info);
- if (ret)
- printk_ratelimited(KERN_ERR "BTRFS: Failure %d "
- "running qgroup updates "
- "during snapshot delete. "
- "Quota is out of sync, "
- "rescan required.\n", ret);
-
btrfs_end_transaction_throttle(trans, tree_root);
out_free:
kfree(wc);
@@ -8627,7 +8988,7 @@ out:
if (!for_reloc && root_dropped == false)
btrfs_add_dead_root(root);
if (err && err != -EAGAIN)
- btrfs_std_error(root->fs_info, err);
+ btrfs_std_error(root->fs_info, err, NULL);
return err;
}
@@ -8751,14 +9112,13 @@ static u64 update_block_group_flags(struct btrfs_root *root, u64 flags)
return flags;
}
-static int set_block_group_ro(struct btrfs_block_group_cache *cache, int force)
+static int inc_block_group_ro(struct btrfs_block_group_cache *cache, int force)
{
struct btrfs_space_info *sinfo = cache->space_info;
u64 num_bytes;
u64 min_allocable_bytes;
int ret = -ENOSPC;
-
/*
* We need some metadata space and system metadata space for
* allocating chunks in some corner cases until we force to set
@@ -8775,6 +9135,7 @@ static int set_block_group_ro(struct btrfs_block_group_cache *cache, int force)
spin_lock(&cache->lock);
if (cache->ro) {
+ cache->ro++;
ret = 0;
goto out;
}
@@ -8786,7 +9147,7 @@ static int set_block_group_ro(struct btrfs_block_group_cache *cache, int force)
sinfo->bytes_may_use + sinfo->bytes_readonly + num_bytes +
min_allocable_bytes <= sinfo->total_bytes) {
sinfo->bytes_readonly += num_bytes;
- cache->ro = 1;
+ cache->ro++;
list_add_tail(&cache->ro_list, &sinfo->ro_bgs);
ret = 0;
}
@@ -8796,7 +9157,7 @@ out:
return ret;
}
-int btrfs_set_block_group_ro(struct btrfs_root *root,
+int btrfs_inc_block_group_ro(struct btrfs_root *root,
struct btrfs_block_group_cache *cache)
{
@@ -8804,8 +9165,6 @@ int btrfs_set_block_group_ro(struct btrfs_root *root,
u64 alloc_flags;
int ret;
- BUG_ON(cache->ro);
-
again:
trans = btrfs_join_transaction(root);
if (IS_ERR(trans))
@@ -8817,7 +9176,7 @@ again:
* back off and let this transaction commit
*/
mutex_lock(&root->fs_info->ro_block_group_mutex);
- if (trans->transaction->dirty_bg_run) {
+ if (test_bit(BTRFS_TRANS_DIRTY_BG_RUN, &trans->transaction->flags)) {
u64 transid = trans->transid;
mutex_unlock(&root->fs_info->ro_block_group_mutex);
@@ -8848,7 +9207,7 @@ again:
goto out;
}
- ret = set_block_group_ro(cache, 0);
+ ret = inc_block_group_ro(cache, 0);
if (!ret)
goto out;
alloc_flags = get_alloc_profile(root, cache->space_info->flags);
@@ -8856,7 +9215,7 @@ again:
CHUNK_ALLOC_FORCE);
if (ret < 0)
goto out;
- ret = set_block_group_ro(cache, 0);
+ ret = inc_block_group_ro(cache, 0);
out:
if (cache->flags & BTRFS_BLOCK_GROUP_SYSTEM) {
alloc_flags = update_block_group_flags(root, cache->flags);
@@ -8919,7 +9278,7 @@ u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo)
return free_bytes;
}
-void btrfs_set_block_group_rw(struct btrfs_root *root,
+void btrfs_dec_block_group_ro(struct btrfs_root *root,
struct btrfs_block_group_cache *cache)
{
struct btrfs_space_info *sinfo = cache->space_info;
@@ -8929,11 +9288,13 @@ void btrfs_set_block_group_rw(struct btrfs_root *root,
spin_lock(&sinfo->lock);
spin_lock(&cache->lock);
- num_bytes = cache->key.offset - cache->reserved - cache->pinned -
- cache->bytes_super - btrfs_block_group_used(&cache->item);
- sinfo->bytes_readonly -= num_bytes;
- cache->ro = 0;
- list_del_init(&cache->ro_list);
+ if (!--cache->ro) {
+ num_bytes = cache->key.offset - cache->reserved -
+ cache->pinned - cache->bytes_super -
+ btrfs_block_group_used(&cache->item);
+ sinfo->bytes_readonly -= num_bytes;
+ list_del_init(&cache->ro_list);
+ }
spin_unlock(&cache->lock);
spin_unlock(&sinfo->lock);
}
@@ -9449,7 +9810,7 @@ int btrfs_read_block_groups(struct btrfs_root *root)
set_avail_alloc_bits(root->fs_info, cache->flags);
if (btrfs_chunk_readonly(root, cache->key.objectid)) {
- set_block_group_ro(cache, 1);
+ inc_block_group_ro(cache, 1);
} else if (btrfs_block_group_used(&cache->item) == 0) {
spin_lock(&info->unused_bgs_lock);
/* Should always be true but just in case. */
@@ -9477,11 +9838,11 @@ int btrfs_read_block_groups(struct btrfs_root *root)
list_for_each_entry(cache,
&space_info->block_groups[BTRFS_RAID_RAID0],
list)
- set_block_group_ro(cache, 1);
+ inc_block_group_ro(cache, 1);
list_for_each_entry(cache,
&space_info->block_groups[BTRFS_RAID_SINGLE],
list)
- set_block_group_ro(cache, 1);
+ inc_block_group_ro(cache, 1);
}
init_global_block_rsv(info);
@@ -9499,7 +9860,9 @@ void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans,
struct btrfs_block_group_item item;
struct btrfs_key key;
int ret = 0;
+ bool can_flush_pending_bgs = trans->can_flush_pending_bgs;
+ trans->can_flush_pending_bgs = false;
list_for_each_entry_safe(block_group, tmp, &trans->new_bgs, bg_list) {
if (ret)
goto next;
@@ -9520,6 +9883,7 @@ void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans,
next:
list_del_init(&block_group->bg_list);
}
+ trans->can_flush_pending_bgs = can_flush_pending_bgs;
}
int btrfs_make_block_group(struct btrfs_trans_handle *trans,
@@ -9562,6 +9926,27 @@ int btrfs_make_block_group(struct btrfs_trans_handle *trans,
free_excluded_extents(root, cache);
+#ifdef CONFIG_BTRFS_DEBUG
+ if (btrfs_should_fragment_free_space(root, cache)) {
+ u64 new_bytes_used = size - bytes_used;
+
+ bytes_used += new_bytes_used >> 1;
+ fragment_free_space(root, cache);
+ }
+#endif
+ /*
+ * Call to ensure the corresponding space_info object is created and
+ * assigned to our block group, but don't update its counters just yet.
+ * We want our bg to be added to the rbtree with its ->space_info set.
+ */
+ ret = update_space_info(root->fs_info, cache->flags, 0, 0,
+ &cache->space_info);
+ if (ret) {
+ btrfs_remove_free_space_cache(cache);
+ btrfs_put_block_group(cache);
+ return ret;
+ }
+
ret = btrfs_add_block_group_cache(root->fs_info, cache);
if (ret) {
btrfs_remove_free_space_cache(cache);
@@ -9569,6 +9954,10 @@ int btrfs_make_block_group(struct btrfs_trans_handle *trans,
return ret;
}
+ /*
+ * Now that our block group has its ->space_info set and is inserted in
+ * the rbtree, update the space info's counters.
+ */
ret = update_space_info(root->fs_info, cache->flags, size, bytes_used,
&cache->space_info);
if (ret) {
@@ -9845,6 +10234,11 @@ int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
* currently running transaction might finish and a new one start,
* allowing for new block groups to be created that can reuse the same
* physical device locations unless we take this special care.
+ *
+ * There may also be an implicit trim operation if the file system
+ * is mounted with -odiscard. The same protections must remain
+ * in place until the extents have been discarded completely when
+ * the transaction commit has completed.
*/
remove_em = (atomic_read(&block_group->trimming) == 0);
/*
@@ -9901,6 +10295,47 @@ out:
return ret;
}
+struct btrfs_trans_handle *
+btrfs_start_trans_remove_block_group(struct btrfs_fs_info *fs_info,
+ const u64 chunk_offset)
+{
+ struct extent_map_tree *em_tree = &fs_info->mapping_tree.map_tree;
+ struct extent_map *em;
+ struct map_lookup *map;
+ unsigned int num_items;
+
+ read_lock(&em_tree->lock);
+ em = lookup_extent_mapping(em_tree, chunk_offset, 1);
+ read_unlock(&em_tree->lock);
+ ASSERT(em && em->start == chunk_offset);
+
+ /*
+ * We need to reserve 3 + N units from the metadata space info in order
+ * to remove a block group (done at btrfs_remove_chunk() and at
+ * btrfs_remove_block_group()), which are used for:
+ *
+ * 1 unit for adding the free space inode's orphan (located in the tree
+ * of tree roots).
+ * 1 unit for deleting the block group item (located in the extent
+ * tree).
+ * 1 unit for deleting the free space item (located in tree of tree
+ * roots).
+ * N units for deleting N device extent items corresponding to each
+ * stripe (located in the device tree).
+ *
+ * In order to remove a block group we also need to reserve units in the
+ * system space info in order to update the chunk tree (update one or
+ * more device items and remove one chunk item), but this is done at
+ * btrfs_remove_chunk() through a call to check_system_chunk().
+ */
+ map = (struct map_lookup *)em->bdev;
+ num_items = 3 + map->num_stripes;
+ free_extent_map(em);
+
+ return btrfs_start_transaction_fallback_global_rsv(fs_info->extent_root,
+ num_items, 1);
+}
+
/*
* Process the unused_bgs list and remove any that don't have any allocated
* space inside of them.
@@ -9919,24 +10354,30 @@ void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info)
spin_lock(&fs_info->unused_bgs_lock);
while (!list_empty(&fs_info->unused_bgs)) {
u64 start, end;
+ int trimming;
block_group = list_first_entry(&fs_info->unused_bgs,
struct btrfs_block_group_cache,
bg_list);
- space_info = block_group->space_info;
list_del_init(&block_group->bg_list);
+
+ space_info = block_group->space_info;
+
if (ret || btrfs_mixed_space_info(space_info)) {
btrfs_put_block_group(block_group);
continue;
}
spin_unlock(&fs_info->unused_bgs_lock);
+ mutex_lock(&fs_info->delete_unused_bgs_mutex);
+
/* Don't want to race with allocators so take the groups_sem */
down_write(&space_info->groups_sem);
spin_lock(&block_group->lock);
if (block_group->reserved ||
btrfs_block_group_used(&block_group->item) ||
- block_group->ro) {
+ block_group->ro ||
+ list_is_singular(&block_group->list)) {
/*
* We want to bail if we made new allocations or have
* outstanding allocations in this block group. We do
@@ -9950,7 +10391,7 @@ void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info)
spin_unlock(&block_group->lock);
/* We don't want to force the issue, only flip if it's ok. */
- ret = set_block_group_ro(block_group, 0);
+ ret = inc_block_group_ro(block_group, 0);
up_write(&space_info->groups_sem);
if (ret < 0) {
ret = 0;
@@ -9961,10 +10402,10 @@ void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info)
* Want to do this before we do anything else so we can recover
* properly if we fail to join the transaction.
*/
- /* 1 for btrfs_orphan_reserve_metadata() */
- trans = btrfs_start_transaction(root, 1);
+ trans = btrfs_start_trans_remove_block_group(fs_info,
+ block_group->key.objectid);
if (IS_ERR(trans)) {
- btrfs_set_block_group_rw(root, block_group);
+ btrfs_dec_block_group_ro(root, block_group);
ret = PTR_ERR(trans);
goto next;
}
@@ -9991,14 +10432,14 @@ void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info)
EXTENT_DIRTY, GFP_NOFS);
if (ret) {
mutex_unlock(&fs_info->unused_bg_unpin_mutex);
- btrfs_set_block_group_rw(root, block_group);
+ btrfs_dec_block_group_ro(root, block_group);
goto end_trans;
}
ret = clear_extent_bits(&fs_info->freed_extents[1], start, end,
EXTENT_DIRTY, GFP_NOFS);
if (ret) {
mutex_unlock(&fs_info->unused_bg_unpin_mutex);
- btrfs_set_block_group_rw(root, block_group);
+ btrfs_dec_block_group_ro(root, block_group);
goto end_trans;
}
mutex_unlock(&fs_info->unused_bg_unpin_mutex);
@@ -10016,15 +10457,47 @@ void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info)
spin_unlock(&block_group->lock);
spin_unlock(&space_info->lock);
+ /* DISCARD can flip during remount */
+ trimming = btrfs_test_opt(root, DISCARD);
+
+ /* Implicit trim during transaction commit. */
+ if (trimming)
+ btrfs_get_block_group_trimming(block_group);
+
/*
* Btrfs_remove_chunk will abort the transaction if things go
* horribly wrong.
*/
ret = btrfs_remove_chunk(trans, root,
block_group->key.objectid);
+
+ if (ret) {
+ if (trimming)
+ btrfs_put_block_group_trimming(block_group);
+ goto end_trans;
+ }
+
+ /*
+ * If we're not mounted with -odiscard, we can just forget
+ * about this block group. Otherwise we'll need to wait
+ * until transaction commit to do the actual discard.
+ */
+ if (trimming) {
+ spin_lock(&fs_info->unused_bgs_lock);
+ /*
+ * A concurrent scrub might have added us to the list
+ * fs_info->unused_bgs, so use a list_move operation
+ * to add the block group to the deleted_bgs list.
+ */
+ list_move(&block_group->bg_list,
+ &trans->transaction->deleted_bgs);
+ spin_unlock(&fs_info->unused_bgs_lock);
+ btrfs_get_block_group(block_group);
+ }
end_trans:
btrfs_end_transaction(trans, root);
next:
+ mutex_unlock(&fs_info->delete_unused_bgs_mutex);
btrfs_put_block_group(block_group);
spin_lock(&fs_info->unused_bgs_lock);
}
@@ -10074,10 +10547,99 @@ int btrfs_error_unpin_extent_range(struct btrfs_root *root, u64 start, u64 end)
return unpin_extent_range(root, start, end, false);
}
+/*
+ * It used to be that old block groups would be left around forever.
+ * Iterating over them would be enough to trim unused space. Since we
+ * now automatically remove them, we also need to iterate over unallocated
+ * space.
+ *
+ * We don't want a transaction for this since the discard may take a
+ * substantial amount of time. We don't require that a transaction be
+ * running, but we do need to take a running transaction into account
+ * to ensure that we're not discarding chunks that were released in
+ * the current transaction.
+ *
+ * Holding the chunks lock will prevent other threads from allocating
+ * or releasing chunks, but it won't prevent a running transaction
+ * from committing and releasing the memory that the pending chunks
+ * list head uses. For that, we need to take a reference to the
+ * transaction.
+ */
+static int btrfs_trim_free_extents(struct btrfs_device *device,
+ u64 minlen, u64 *trimmed)
+{
+ u64 start = 0, len = 0;
+ int ret;
+
+ *trimmed = 0;
+
+ /* Not writeable = nothing to do. */
+ if (!device->writeable)
+ return 0;
+
+ /* No free space = nothing to do. */
+ if (device->total_bytes <= device->bytes_used)
+ return 0;
+
+ ret = 0;
+
+ while (1) {
+ struct btrfs_fs_info *fs_info = device->dev_root->fs_info;
+ struct btrfs_transaction *trans;
+ u64 bytes;
+
+ ret = mutex_lock_interruptible(&fs_info->chunk_mutex);
+ if (ret)
+ return ret;
+
+ down_read(&fs_info->commit_root_sem);
+
+ spin_lock(&fs_info->trans_lock);
+ trans = fs_info->running_transaction;
+ if (trans)
+ atomic_inc(&trans->use_count);
+ spin_unlock(&fs_info->trans_lock);
+
+ ret = find_free_dev_extent_start(trans, device, minlen, start,
+ &start, &len);
+ if (trans)
+ btrfs_put_transaction(trans);
+
+ if (ret) {
+ up_read(&fs_info->commit_root_sem);
+ mutex_unlock(&fs_info->chunk_mutex);
+ if (ret == -ENOSPC)
+ ret = 0;
+ break;
+ }
+
+ ret = btrfs_issue_discard(device->bdev, start, len, &bytes);
+ up_read(&fs_info->commit_root_sem);
+ mutex_unlock(&fs_info->chunk_mutex);
+
+ if (ret)
+ break;
+
+ start += len;
+ *trimmed += bytes;
+
+ if (fatal_signal_pending(current)) {
+ ret = -ERESTARTSYS;
+ break;
+ }
+
+ cond_resched();
+ }
+
+ return ret;
+}
+
int btrfs_trim_fs(struct btrfs_root *root, struct fstrim_range *range)
{
struct btrfs_fs_info *fs_info = root->fs_info;
struct btrfs_block_group_cache *cache = NULL;
+ struct btrfs_device *device;
+ struct list_head *devices;
u64 group_trimmed;
u64 start;
u64 end;
@@ -10132,6 +10694,18 @@ int btrfs_trim_fs(struct btrfs_root *root, struct fstrim_range *range)
cache = next_block_group(fs_info->tree_root, cache);
}
+ mutex_lock(&root->fs_info->fs_devices->device_list_mutex);
+ devices = &root->fs_info->fs_devices->alloc_list;
+ list_for_each_entry(device, devices, dev_alloc_list) {
+ ret = btrfs_trim_free_extents(device, range->minlen,
+ &group_trimmed);
+ if (ret)
+ break;
+
+ trimmed += group_trimmed;
+ }
+ mutex_unlock(&root->fs_info->fs_devices->device_list_mutex);
+
range->len = trimmed;
return ret;
}
@@ -10148,8 +10722,7 @@ void btrfs_end_write_no_snapshoting(struct btrfs_root *root)
{
percpu_counter_dec(&root->subv_writers->counter);
/*
- * Make sure counter is updated before we wake up
- * waiters.
+ * Make sure counter is updated before we wake up waiters.
*/
smp_mb();
if (waitqueue_active(&root->subv_writers->wait))
diff --git a/kernel/fs/btrfs/extent-tree.h b/kernel/fs/btrfs/extent-tree.h
new file mode 100644
index 000000000..e69de29bb
--- /dev/null
+++ b/kernel/fs/btrfs/extent-tree.h
diff --git a/kernel/fs/btrfs/extent_io.c b/kernel/fs/btrfs/extent_io.c
index c32d226bf..9abe18763 100644
--- a/kernel/fs/btrfs/extent_io.c
+++ b/kernel/fs/btrfs/extent_io.c
@@ -96,8 +96,8 @@ static inline void __btrfs_debug_check_extent_io_range(const char *caller,
inode = tree->mapping->host;
isize = i_size_read(inode);
if (end >= PAGE_SIZE && (end % 2) == 0 && end != isize - 1) {
- printk_ratelimited(KERN_DEBUG
- "BTRFS: %s: ino %llu isize %llu odd range [%llu,%llu]\n",
+ btrfs_debug_rl(BTRFS_I(inode)->root->fs_info,
+ "%s: ino %llu isize %llu odd range [%llu,%llu]",
caller, btrfs_ino(inode), isize, start, end);
}
}
@@ -131,6 +131,25 @@ struct extent_page_data {
unsigned int sync_io:1;
};
+static void add_extent_changeset(struct extent_state *state, unsigned bits,
+ struct extent_changeset *changeset,
+ int set)
+{
+ int ret;
+
+ if (!changeset)
+ return;
+ if (set && (state->state & bits) == bits)
+ return;
+ if (!set && (state->state & bits) == 0)
+ return;
+ changeset->bytes_changed += state->end - state->start + 1;
+ ret = ulist_add(changeset->range_changed, state->start, state->end,
+ GFP_ATOMIC);
+ /* ENOMEM */
+ BUG_ON(ret < 0);
+}
+
static noinline void flush_write_bio(void *data);
static inline struct btrfs_fs_info *
tree_fs_info(struct extent_io_tree *tree)
@@ -410,7 +429,8 @@ static void clear_state_cb(struct extent_io_tree *tree,
}
static void set_state_bits(struct extent_io_tree *tree,
- struct extent_state *state, unsigned *bits);
+ struct extent_state *state, unsigned *bits,
+ struct extent_changeset *changeset);
/*
* insert an extent_state struct into the tree. 'bits' are set on the
@@ -426,7 +446,7 @@ static int insert_state(struct extent_io_tree *tree,
struct extent_state *state, u64 start, u64 end,
struct rb_node ***p,
struct rb_node **parent,
- unsigned *bits)
+ unsigned *bits, struct extent_changeset *changeset)
{
struct rb_node *node;
@@ -436,7 +456,7 @@ static int insert_state(struct extent_io_tree *tree,
state->start = start;
state->end = end;
- set_state_bits(tree, state, bits);
+ set_state_bits(tree, state, bits, changeset);
node = tree_insert(&tree->state, NULL, end, &state->rb_node, p, parent);
if (node) {
@@ -511,7 +531,8 @@ static struct extent_state *next_state(struct extent_state *state)
*/
static struct extent_state *clear_state_bit(struct extent_io_tree *tree,
struct extent_state *state,
- unsigned *bits, int wake)
+ unsigned *bits, int wake,
+ struct extent_changeset *changeset)
{
struct extent_state *next;
unsigned bits_to_clear = *bits & ~EXTENT_CTLBITS;
@@ -522,6 +543,7 @@ static struct extent_state *clear_state_bit(struct extent_io_tree *tree,
tree->dirty_bytes -= range;
}
clear_state_cb(tree, state, bits);
+ add_extent_changeset(state, bits_to_clear, changeset, 0);
state->state &= ~bits_to_clear;
if (wake)
wake_up(&state->wq);
@@ -569,10 +591,10 @@ static void extent_io_tree_panic(struct extent_io_tree *tree, int err)
*
* This takes the tree lock, and returns 0 on success and < 0 on error.
*/
-int clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
- unsigned bits, int wake, int delete,
- struct extent_state **cached_state,
- gfp_t mask)
+static int __clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
+ unsigned bits, int wake, int delete,
+ struct extent_state **cached_state,
+ gfp_t mask, struct extent_changeset *changeset)
{
struct extent_state *state;
struct extent_state *cached;
@@ -594,7 +616,7 @@ int clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
if (bits & (EXTENT_IOBITS | EXTENT_BOUNDARY))
clear = 1;
again:
- if (!prealloc && (mask & __GFP_WAIT)) {
+ if (!prealloc && gfpflags_allow_blocking(mask)) {
/*
* Don't care for allocation failure here because we might end
* up not needing the pre-allocated extent state at all, which
@@ -671,7 +693,8 @@ hit_next:
if (err)
goto out;
if (state->end <= end) {
- state = clear_state_bit(tree, state, &bits, wake);
+ state = clear_state_bit(tree, state, &bits, wake,
+ changeset);
goto next;
}
goto search_again;
@@ -692,13 +715,13 @@ hit_next:
if (wake)
wake_up(&state->wq);
- clear_state_bit(tree, prealloc, &bits, wake);
+ clear_state_bit(tree, prealloc, &bits, wake, changeset);
prealloc = NULL;
goto out;
}
- state = clear_state_bit(tree, state, &bits, wake);
+ state = clear_state_bit(tree, state, &bits, wake, changeset);
next:
if (last_end == (u64)-1)
goto out;
@@ -718,7 +741,7 @@ search_again:
if (start > end)
goto out;
spin_unlock(&tree->lock);
- if (mask & __GFP_WAIT)
+ if (gfpflags_allow_blocking(mask))
cond_resched();
goto again;
}
@@ -789,7 +812,7 @@ out:
static void set_state_bits(struct extent_io_tree *tree,
struct extent_state *state,
- unsigned *bits)
+ unsigned *bits, struct extent_changeset *changeset)
{
unsigned bits_to_set = *bits & ~EXTENT_CTLBITS;
@@ -798,6 +821,7 @@ static void set_state_bits(struct extent_io_tree *tree,
u64 range = state->end - state->start + 1;
tree->dirty_bytes += range;
}
+ add_extent_changeset(state, bits_to_set, changeset, 1);
state->state |= bits_to_set;
}
@@ -835,7 +859,7 @@ static int __must_check
__set_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
unsigned bits, unsigned exclusive_bits,
u64 *failed_start, struct extent_state **cached_state,
- gfp_t mask)
+ gfp_t mask, struct extent_changeset *changeset)
{
struct extent_state *state;
struct extent_state *prealloc = NULL;
@@ -850,7 +874,7 @@ __set_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
bits |= EXTENT_FIRST_DELALLOC;
again:
- if (!prealloc && (mask & __GFP_WAIT)) {
+ if (!prealloc && gfpflags_allow_blocking(mask)) {
prealloc = alloc_extent_state(mask);
BUG_ON(!prealloc);
}
@@ -873,7 +897,7 @@ again:
prealloc = alloc_extent_state_atomic(prealloc);
BUG_ON(!prealloc);
err = insert_state(tree, prealloc, start, end,
- &p, &parent, &bits);
+ &p, &parent, &bits, changeset);
if (err)
extent_io_tree_panic(tree, err);
@@ -899,7 +923,7 @@ hit_next:
goto out;
}
- set_state_bits(tree, state, &bits);
+ set_state_bits(tree, state, &bits, changeset);
cache_state(state, cached_state);
merge_state(tree, state);
if (last_end == (u64)-1)
@@ -945,7 +969,7 @@ hit_next:
if (err)
goto out;
if (state->end <= end) {
- set_state_bits(tree, state, &bits);
+ set_state_bits(tree, state, &bits, changeset);
cache_state(state, cached_state);
merge_state(tree, state);
if (last_end == (u64)-1)
@@ -980,7 +1004,7 @@ hit_next:
* the later extent.
*/
err = insert_state(tree, prealloc, start, this_end,
- NULL, NULL, &bits);
+ NULL, NULL, &bits, changeset);
if (err)
extent_io_tree_panic(tree, err);
@@ -1008,7 +1032,7 @@ hit_next:
if (err)
extent_io_tree_panic(tree, err);
- set_state_bits(tree, prealloc, &bits);
+ set_state_bits(tree, prealloc, &bits, changeset);
cache_state(prealloc, cached_state);
merge_state(tree, prealloc);
prealloc = NULL;
@@ -1028,7 +1052,7 @@ search_again:
if (start > end)
goto out;
spin_unlock(&tree->lock);
- if (mask & __GFP_WAIT)
+ if (gfpflags_allow_blocking(mask))
cond_resched();
goto again;
}
@@ -1038,7 +1062,7 @@ int set_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
struct extent_state **cached_state, gfp_t mask)
{
return __set_extent_bit(tree, start, end, bits, 0, failed_start,
- cached_state, mask);
+ cached_state, mask, NULL);
}
@@ -1076,7 +1100,7 @@ int convert_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
btrfs_debug_check_extent_io_range(tree, start, end);
again:
- if (!prealloc && (mask & __GFP_WAIT)) {
+ if (!prealloc && gfpflags_allow_blocking(mask)) {
/*
* Best effort, don't worry if extent state allocation fails
* here for the first iteration. We might have a cached state
@@ -1111,7 +1135,7 @@ again:
goto out;
}
err = insert_state(tree, prealloc, start, end,
- &p, &parent, &bits);
+ &p, &parent, &bits, NULL);
if (err)
extent_io_tree_panic(tree, err);
cache_state(prealloc, cached_state);
@@ -1130,9 +1154,9 @@ hit_next:
* Just lock what we found and keep going
*/
if (state->start == start && state->end <= end) {
- set_state_bits(tree, state, &bits);
+ set_state_bits(tree, state, &bits, NULL);
cache_state(state, cached_state);
- state = clear_state_bit(tree, state, &clear_bits, 0);
+ state = clear_state_bit(tree, state, &clear_bits, 0, NULL);
if (last_end == (u64)-1)
goto out;
start = last_end + 1;
@@ -1171,9 +1195,10 @@ hit_next:
if (err)
goto out;
if (state->end <= end) {
- set_state_bits(tree, state, &bits);
+ set_state_bits(tree, state, &bits, NULL);
cache_state(state, cached_state);
- state = clear_state_bit(tree, state, &clear_bits, 0);
+ state = clear_state_bit(tree, state, &clear_bits, 0,
+ NULL);
if (last_end == (u64)-1)
goto out;
start = last_end + 1;
@@ -1208,7 +1233,7 @@ hit_next:
* the later extent.
*/
err = insert_state(tree, prealloc, start, this_end,
- NULL, NULL, &bits);
+ NULL, NULL, &bits, NULL);
if (err)
extent_io_tree_panic(tree, err);
cache_state(prealloc, cached_state);
@@ -1233,9 +1258,9 @@ hit_next:
if (err)
extent_io_tree_panic(tree, err);
- set_state_bits(tree, prealloc, &bits);
+ set_state_bits(tree, prealloc, &bits, NULL);
cache_state(prealloc, cached_state);
- clear_state_bit(tree, prealloc, &clear_bits, 0);
+ clear_state_bit(tree, prealloc, &clear_bits, 0, NULL);
prealloc = NULL;
goto out;
}
@@ -1253,7 +1278,7 @@ search_again:
if (start > end)
goto out;
spin_unlock(&tree->lock);
- if (mask & __GFP_WAIT)
+ if (gfpflags_allow_blocking(mask))
cond_resched();
first_iteration = false;
goto again;
@@ -1274,10 +1299,53 @@ int set_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
NULL, mask);
}
+int set_record_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
+ unsigned bits, gfp_t mask,
+ struct extent_changeset *changeset)
+{
+ /*
+ * We don't support EXTENT_LOCKED yet, as current changeset will
+ * record any bits changed, so for EXTENT_LOCKED case, it will
+ * either fail with -EEXIST or changeset will record the whole
+ * range.
+ */
+ BUG_ON(bits & EXTENT_LOCKED);
+
+ return __set_extent_bit(tree, start, end, bits, 0, NULL, NULL, mask,
+ changeset);
+}
+
+int clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
+ unsigned bits, int wake, int delete,
+ struct extent_state **cached, gfp_t mask)
+{
+ return __clear_extent_bit(tree, start, end, bits, wake, delete,
+ cached, mask, NULL);
+}
+
int clear_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
unsigned bits, gfp_t mask)
{
- return clear_extent_bit(tree, start, end, bits, 0, 0, NULL, mask);
+ int wake = 0;
+
+ if (bits & EXTENT_LOCKED)
+ wake = 1;
+
+ return clear_extent_bit(tree, start, end, bits, wake, 0, NULL, mask);
+}
+
+int clear_record_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
+ unsigned bits, gfp_t mask,
+ struct extent_changeset *changeset)
+{
+ /*
+ * Don't support EXTENT_LOCKED case, same reason as
+ * set_record_extent_bits().
+ */
+ BUG_ON(bits & EXTENT_LOCKED);
+
+ return __clear_extent_bit(tree, start, end, bits, 0, 0, NULL, mask,
+ changeset);
}
int set_extent_delalloc(struct extent_io_tree *tree, u64 start, u64 end,
@@ -1338,7 +1406,7 @@ int lock_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
while (1) {
err = __set_extent_bit(tree, start, end, EXTENT_LOCKED | bits,
EXTENT_LOCKED, &failed_start,
- cached_state, GFP_NOFS);
+ cached_state, GFP_NOFS, NULL);
if (err == -EEXIST) {
wait_extent_bit(tree, failed_start, end, EXTENT_LOCKED);
start = failed_start;
@@ -1360,7 +1428,7 @@ int try_lock_extent(struct extent_io_tree *tree, u64 start, u64 end)
u64 failed_start;
err = __set_extent_bit(tree, start, end, EXTENT_LOCKED, EXTENT_LOCKED,
- &failed_start, NULL, GFP_NOFS);
+ &failed_start, NULL, GFP_NOFS, NULL);
if (err == -EEXIST) {
if (failed_start > start)
clear_extent_bit(tree, start, failed_start - 1,
@@ -2073,8 +2141,8 @@ int repair_io_failure(struct inode *inode, u64 start, u64 length, u64 logical,
return -EIO;
}
- printk_ratelimited_in_rcu(KERN_INFO
- "BTRFS: read error corrected: ino %llu off %llu (dev %s sector %llu)\n",
+ btrfs_info_rl_in_rcu(fs_info,
+ "read error corrected: ino %llu off %llu (dev %s sector %llu)",
btrfs_ino(inode), start,
rcu_str_deref(dev->name), sector);
bio_put(bio);
@@ -2481,7 +2549,7 @@ int end_extent_writepage(struct page *page, int err, u64 start, u64 end)
* Scheduling is not allowed, so the extent state tree is expected
* to have one and only one object corresponding to this IO.
*/
-static void end_bio_extent_writepage(struct bio *bio, int err)
+static void end_bio_extent_writepage(struct bio *bio)
{
struct bio_vec *bvec;
u64 start;
@@ -2511,7 +2579,7 @@ static void end_bio_extent_writepage(struct bio *bio, int err)
start = page_offset(page);
end = start + bvec->bv_offset + bvec->bv_len - 1;
- if (end_extent_writepage(page, err, start, end))
+ if (end_extent_writepage(page, bio->bi_error, start, end))
continue;
end_page_writeback(page);
@@ -2543,10 +2611,10 @@ endio_readpage_release_extent(struct extent_io_tree *tree, u64 start, u64 len,
* Scheduling is not allowed, so the extent state tree is expected
* to have one and only one object corresponding to this IO.
*/
-static void end_bio_extent_readpage(struct bio *bio, int err)
+static void end_bio_extent_readpage(struct bio *bio)
{
struct bio_vec *bvec;
- int uptodate = test_bit(BIO_UPTODATE, &bio->bi_flags);
+ int uptodate = !bio->bi_error;
struct btrfs_io_bio *io_bio = btrfs_io_bio(bio);
struct extent_io_tree *tree;
u64 offset = 0;
@@ -2559,16 +2627,13 @@ static void end_bio_extent_readpage(struct bio *bio, int err)
int ret;
int i;
- if (err)
- uptodate = 0;
-
bio_for_each_segment_all(bvec, bio, i) {
struct page *page = bvec->bv_page;
struct inode *inode = page->mapping->host;
pr_debug("end_bio_extent_readpage: bi_sector=%llu, err=%d, "
- "mirror=%u\n", (u64)bio->bi_iter.bi_sector, err,
- io_bio->mirror_num);
+ "mirror=%u\n", (u64)bio->bi_iter.bi_sector,
+ bio->bi_error, io_bio->mirror_num);
tree = &BTRFS_I(inode)->io_tree;
/* We always issue full-page reads, but if some block
@@ -2609,8 +2674,7 @@ static void end_bio_extent_readpage(struct bio *bio, int err)
if (tree->ops && tree->ops->readpage_io_failed_hook) {
ret = tree->ops->readpage_io_failed_hook(page, mirror);
- if (!ret && !err &&
- test_bit(BIO_UPTODATE, &bio->bi_flags))
+ if (!ret && !bio->bi_error)
uptodate = 1;
} else {
/*
@@ -2626,10 +2690,7 @@ static void end_bio_extent_readpage(struct bio *bio, int err)
ret = bio_readpage_error(bio, offset, page, start, end,
mirror);
if (ret == 0) {
- uptodate =
- test_bit(BIO_UPTODATE, &bio->bi_flags);
- if (err)
- uptodate = 0;
+ uptodate = !bio->bi_error;
offset += len;
continue;
}
@@ -2679,7 +2740,7 @@ readpage_ok:
endio_readpage_release_extent(tree, extent_start, extent_len,
uptodate);
if (io_bio->end_io)
- io_bio->end_io(io_bio, err);
+ io_bio->end_io(io_bio, bio->bi_error);
bio_put(bio);
}
@@ -2725,6 +2786,12 @@ struct bio *btrfs_bio_clone(struct bio *bio, gfp_t gfp_mask)
btrfs_bio->csum = NULL;
btrfs_bio->csum_allocated = NULL;
btrfs_bio->end_io = NULL;
+
+#ifdef CONFIG_BLK_CGROUP
+ /* FIXME, put this into bio_clone_bioset */
+ if (bio->bi_css)
+ bio_associate_blkcg(new, bio->bi_css);
+#endif
}
return new;
}
@@ -2767,8 +2834,6 @@ static int __must_check submit_one_bio(int rw, struct bio *bio,
else
btrfsic_submit_bio(rw, bio);
- if (bio_flagged(bio, BIO_EOPNOTSUPP))
- ret = -EOPNOTSUPP;
bio_put(bio);
return ret;
}
@@ -2787,6 +2852,7 @@ static int merge_bio(int rw, struct extent_io_tree *tree, struct page *page,
}
static int submit_extent_page(int rw, struct extent_io_tree *tree,
+ struct writeback_control *wbc,
struct page *page, sector_t sector,
size_t size, unsigned long offset,
struct block_device *bdev,
@@ -2795,13 +2861,12 @@ static int submit_extent_page(int rw, struct extent_io_tree *tree,
bio_end_io_t end_io_func,
int mirror_num,
unsigned long prev_bio_flags,
- unsigned long bio_flags)
+ unsigned long bio_flags,
+ bool force_bio_submit)
{
int ret = 0;
struct bio *bio;
- int nr;
int contig = 0;
- int this_compressed = bio_flags & EXTENT_BIO_COMPRESSED;
int old_compressed = prev_bio_flags & EXTENT_BIO_COMPRESSED;
size_t page_size = min_t(size_t, size, PAGE_CACHE_SIZE);
@@ -2813,6 +2878,7 @@ static int submit_extent_page(int rw, struct extent_io_tree *tree,
contig = bio_end_sector(bio) == sector;
if (prev_bio_flags != bio_flags || !contig ||
+ force_bio_submit ||
merge_bio(rw, tree, page, offset, page_size, bio, bio_flags) ||
bio_add_page(bio, page, page_size, offset) < page_size) {
ret = submit_one_bio(rw, bio, mirror_num,
@@ -2823,21 +2889,24 @@ static int submit_extent_page(int rw, struct extent_io_tree *tree,
}
bio = NULL;
} else {
+ if (wbc)
+ wbc_account_io(wbc, page, page_size);
return 0;
}
}
- if (this_compressed)
- nr = BIO_MAX_PAGES;
- else
- nr = bio_get_nr_vecs(bdev);
- bio = btrfs_bio_alloc(bdev, sector, nr, GFP_NOFS | __GFP_HIGH);
+ bio = btrfs_bio_alloc(bdev, sector, BIO_MAX_PAGES,
+ GFP_NOFS | __GFP_HIGH);
if (!bio)
return -ENOMEM;
bio_add_page(bio, page, page_size, offset);
bio->bi_end_io = end_io_func;
bio->bi_private = tree;
+ if (wbc) {
+ wbc_init_bio(wbc, bio);
+ wbc_account_io(wbc, page, page_size);
+ }
if (bio_ret)
*bio_ret = bio;
@@ -2906,7 +2975,8 @@ static int __do_readpage(struct extent_io_tree *tree,
get_extent_t *get_extent,
struct extent_map **em_cached,
struct bio **bio, int mirror_num,
- unsigned long *bio_flags, int rw)
+ unsigned long *bio_flags, int rw,
+ u64 *prev_em_start)
{
struct inode *inode = page->mapping->host;
u64 start = page_offset(page);
@@ -2954,6 +3024,7 @@ static int __do_readpage(struct extent_io_tree *tree,
}
while (cur <= end) {
unsigned long pnr = (last_byte >> PAGE_CACHE_SHIFT) + 1;
+ bool force_bio_submit = false;
if (cur >= last_byte) {
char *userpage;
@@ -3004,6 +3075,49 @@ static int __do_readpage(struct extent_io_tree *tree,
block_start = em->block_start;
if (test_bit(EXTENT_FLAG_PREALLOC, &em->flags))
block_start = EXTENT_MAP_HOLE;
+
+ /*
+ * If we have a file range that points to a compressed extent
+ * and it's followed by a consecutive file range that points to
+ * to the same compressed extent (possibly with a different
+ * offset and/or length, so it either points to the whole extent
+ * or only part of it), we must make sure we do not submit a
+ * single bio to populate the pages for the 2 ranges because
+ * this makes the compressed extent read zero out the pages
+ * belonging to the 2nd range. Imagine the following scenario:
+ *
+ * File layout
+ * [0 - 8K] [8K - 24K]
+ * | |
+ * | |
+ * points to extent X, points to extent X,
+ * offset 4K, length of 8K offset 0, length 16K
+ *
+ * [extent X, compressed length = 4K uncompressed length = 16K]
+ *
+ * If the bio to read the compressed extent covers both ranges,
+ * it will decompress extent X into the pages belonging to the
+ * first range and then it will stop, zeroing out the remaining
+ * pages that belong to the other range that points to extent X.
+ * So here we make sure we submit 2 bios, one for the first
+ * range and another one for the third range. Both will target
+ * the same physical extent from disk, but we can't currently
+ * make the compressed bio endio callback populate the pages
+ * for both ranges because each compressed bio is tightly
+ * coupled with a single extent map, and each range can have
+ * an extent map with a different offset value relative to the
+ * uncompressed data of our extent and different lengths. This
+ * is a corner case so we prioritize correctness over
+ * non-optimal behavior (submitting 2 bios for the same extent).
+ */
+ if (test_bit(EXTENT_FLAG_COMPRESSED, &em->flags) &&
+ prev_em_start && *prev_em_start != (u64)-1 &&
+ *prev_em_start != em->orig_start)
+ force_bio_submit = true;
+
+ if (prev_em_start)
+ *prev_em_start = em->orig_start;
+
free_extent_map(em);
em = NULL;
@@ -3019,8 +3133,12 @@ static int __do_readpage(struct extent_io_tree *tree,
set_extent_uptodate(tree, cur, cur + iosize - 1,
&cached, GFP_NOFS);
- unlock_extent_cached(tree, cur, cur + iosize - 1,
- &cached, GFP_NOFS);
+ if (parent_locked)
+ free_extent_state(cached);
+ else
+ unlock_extent_cached(tree, cur,
+ cur + iosize - 1,
+ &cached, GFP_NOFS);
cur = cur + iosize;
pg_offset += iosize;
continue;
@@ -3048,12 +3166,13 @@ static int __do_readpage(struct extent_io_tree *tree,
}
pnr -= page->index;
- ret = submit_extent_page(rw, tree, page,
+ ret = submit_extent_page(rw, tree, NULL, page,
sector, disk_io_size, pg_offset,
bdev, bio, pnr,
end_bio_extent_readpage, mirror_num,
*bio_flags,
- this_bio_flag);
+ this_bio_flag,
+ force_bio_submit);
if (!ret) {
nr++;
*bio_flags = this_bio_flag;
@@ -3080,7 +3199,8 @@ static inline void __do_contiguous_readpages(struct extent_io_tree *tree,
get_extent_t *get_extent,
struct extent_map **em_cached,
struct bio **bio, int mirror_num,
- unsigned long *bio_flags, int rw)
+ unsigned long *bio_flags, int rw,
+ u64 *prev_em_start)
{
struct inode *inode;
struct btrfs_ordered_extent *ordered;
@@ -3100,7 +3220,7 @@ static inline void __do_contiguous_readpages(struct extent_io_tree *tree,
for (index = 0; index < nr_pages; index++) {
__do_readpage(tree, pages[index], get_extent, em_cached, bio,
- mirror_num, bio_flags, rw);
+ mirror_num, bio_flags, rw, prev_em_start);
page_cache_release(pages[index]);
}
}
@@ -3110,7 +3230,8 @@ static void __extent_readpages(struct extent_io_tree *tree,
int nr_pages, get_extent_t *get_extent,
struct extent_map **em_cached,
struct bio **bio, int mirror_num,
- unsigned long *bio_flags, int rw)
+ unsigned long *bio_flags, int rw,
+ u64 *prev_em_start)
{
u64 start = 0;
u64 end = 0;
@@ -3131,7 +3252,7 @@ static void __extent_readpages(struct extent_io_tree *tree,
index - first_index, start,
end, get_extent, em_cached,
bio, mirror_num, bio_flags,
- rw);
+ rw, prev_em_start);
start = page_start;
end = start + PAGE_CACHE_SIZE - 1;
first_index = index;
@@ -3142,7 +3263,8 @@ static void __extent_readpages(struct extent_io_tree *tree,
__do_contiguous_readpages(tree, &pages[first_index],
index - first_index, start,
end, get_extent, em_cached, bio,
- mirror_num, bio_flags, rw);
+ mirror_num, bio_flags, rw,
+ prev_em_start);
}
static int __extent_read_full_page(struct extent_io_tree *tree,
@@ -3168,7 +3290,7 @@ static int __extent_read_full_page(struct extent_io_tree *tree,
}
ret = __do_readpage(tree, page, get_extent, NULL, bio, mirror_num,
- bio_flags, rw);
+ bio_flags, rw, NULL);
return ret;
}
@@ -3194,7 +3316,7 @@ int extent_read_full_page_nolock(struct extent_io_tree *tree, struct page *page,
int ret;
ret = __do_readpage(tree, page, get_extent, NULL, &bio, mirror_num,
- &bio_flags, READ);
+ &bio_flags, READ, NULL);
if (bio)
ret = submit_one_bio(READ, bio, mirror_num, bio_flags);
return ret;
@@ -3443,11 +3565,11 @@ static noinline_for_stack int __extent_writepage_io(struct inode *inode,
page->index, cur, end);
}
- ret = submit_extent_page(write_flags, tree, page,
+ ret = submit_extent_page(write_flags, tree, wbc, page,
sector, iosize, pg_offset,
bdev, &epd->bio, max_nr,
end_bio_extent_writepage,
- 0, 0, 0);
+ 0, 0, 0, false);
if (ret)
SetPageError(page);
}
@@ -3693,7 +3815,7 @@ static void set_btree_ioerr(struct page *page)
}
}
-static void end_bio_extent_buffer_writepage(struct bio *bio, int err)
+static void end_bio_extent_buffer_writepage(struct bio *bio)
{
struct bio_vec *bvec;
struct extent_buffer *eb;
@@ -3706,7 +3828,8 @@ static void end_bio_extent_buffer_writepage(struct bio *bio, int err)
BUG_ON(!eb);
done = atomic_dec_and_test(&eb->io_pages);
- if (err || test_bit(EXTENT_BUFFER_WRITE_ERR, &eb->bflags)) {
+ if (bio->bi_error ||
+ test_bit(EXTENT_BUFFER_WRITE_ERR, &eb->bflags)) {
ClearPageUptodate(page);
set_btree_ioerr(page);
}
@@ -3746,10 +3869,10 @@ static noinline_for_stack int write_one_eb(struct extent_buffer *eb,
clear_page_dirty_for_io(p);
set_page_writeback(p);
- ret = submit_extent_page(rw, tree, p, offset >> 9,
+ ret = submit_extent_page(rw, tree, wbc, p, offset >> 9,
PAGE_CACHE_SIZE, 0, bdev, &epd->bio,
-1, end_bio_extent_buffer_writepage,
- 0, epd->bio_flags, bio_flags);
+ 0, epd->bio_flags, bio_flags, false);
epd->bio_flags = bio_flags;
if (ret) {
set_btree_ioerr(p);
@@ -4153,6 +4276,7 @@ int extent_readpages(struct extent_io_tree *tree,
struct page *page;
struct extent_map *em_cached = NULL;
int nr = 0;
+ u64 prev_em_start = (u64)-1;
for (page_idx = 0; page_idx < nr_pages; page_idx++) {
page = list_entry(pages->prev, struct page, lru);
@@ -4169,12 +4293,12 @@ int extent_readpages(struct extent_io_tree *tree,
if (nr < ARRAY_SIZE(pagepool))
continue;
__extent_readpages(tree, pagepool, nr, get_extent, &em_cached,
- &bio, 0, &bio_flags, READ);
+ &bio, 0, &bio_flags, READ, &prev_em_start);
nr = 0;
}
if (nr)
__extent_readpages(tree, pagepool, nr, get_extent, &em_cached,
- &bio, 0, &bio_flags, READ);
+ &bio, 0, &bio_flags, READ, &prev_em_start);
if (em_cached)
free_extent_map(em_cached);
@@ -4262,7 +4386,7 @@ int try_release_extent_mapping(struct extent_map_tree *map,
u64 start = page_offset(page);
u64 end = start + PAGE_CACHE_SIZE - 1;
- if ((mask & __GFP_WAIT) &&
+ if (gfpflags_allow_blocking(mask) &&
page->mapping->host->i_size > 16 * 1024 * 1024) {
u64 len;
while (start <= end) {
@@ -4492,6 +4616,8 @@ int extent_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
}
if (test_bit(EXTENT_FLAG_COMPRESSED, &em->flags))
flags |= FIEMAP_EXTENT_ENCODED;
+ if (test_bit(EXTENT_FLAG_PREALLOC, &em->flags))
+ flags |= FIEMAP_EXTENT_UNWRITTEN;
free_extent_map(em);
em = NULL;
@@ -4609,9 +4735,7 @@ __alloc_extent_buffer(struct btrfs_fs_info *fs_info, u64 start,
{
struct extent_buffer *eb = NULL;
- eb = kmem_cache_zalloc(extent_buffer_cache, GFP_NOFS);
- if (eb == NULL)
- return NULL;
+ eb = kmem_cache_zalloc(extent_buffer_cache, GFP_NOFS|__GFP_NOFAIL);
eb->start = start;
eb->len = len;
eb->fs_info = fs_info;
@@ -4869,7 +4993,7 @@ struct extent_buffer *alloc_extent_buffer(struct btrfs_fs_info *fs_info,
return NULL;
for (i = 0; i < num_pages; i++, index++) {
- p = find_or_create_page(mapping, index, GFP_NOFS);
+ p = find_or_create_page(mapping, index, GFP_NOFS|__GFP_NOFAIL);
if (!p)
goto free_eb;
@@ -5509,13 +5633,15 @@ void memcpy_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset,
unsigned long src_i;
if (src_offset + len > dst->len) {
- printk(KERN_ERR "BTRFS: memmove bogus src_offset %lu move "
- "len %lu dst len %lu\n", src_offset, len, dst->len);
+ btrfs_err(dst->fs_info,
+ "memmove bogus src_offset %lu move "
+ "len %lu dst len %lu", src_offset, len, dst->len);
BUG_ON(1);
}
if (dst_offset + len > dst->len) {
- printk(KERN_ERR "BTRFS: memmove bogus dst_offset %lu move "
- "len %lu dst len %lu\n", dst_offset, len, dst->len);
+ btrfs_err(dst->fs_info,
+ "memmove bogus dst_offset %lu move "
+ "len %lu dst len %lu", dst_offset, len, dst->len);
BUG_ON(1);
}
@@ -5555,13 +5681,13 @@ void memmove_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset,
unsigned long src_i;
if (src_offset + len > dst->len) {
- printk(KERN_ERR "BTRFS: memmove bogus src_offset %lu move "
- "len %lu len %lu\n", src_offset, len, dst->len);
+ btrfs_err(dst->fs_info, "memmove bogus src_offset %lu move "
+ "len %lu len %lu", src_offset, len, dst->len);
BUG_ON(1);
}
if (dst_offset + len > dst->len) {
- printk(KERN_ERR "BTRFS: memmove bogus dst_offset %lu move "
- "len %lu len %lu\n", dst_offset, len, dst->len);
+ btrfs_err(dst->fs_info, "memmove bogus dst_offset %lu move "
+ "len %lu len %lu", dst_offset, len, dst->len);
BUG_ON(1);
}
if (dst_offset < src_offset) {
diff --git a/kernel/fs/btrfs/extent_io.h b/kernel/fs/btrfs/extent_io.h
index c668f3689..f4c1ae118 100644
--- a/kernel/fs/btrfs/extent_io.h
+++ b/kernel/fs/btrfs/extent_io.h
@@ -2,6 +2,7 @@
#define __EXTENTIO__
#include <linux/rbtree.h>
+#include "ulist.h"
/* bits for the extent state */
#define EXTENT_DIRTY (1U << 0)
@@ -18,6 +19,7 @@
#define EXTENT_NEED_WAIT (1U << 13)
#define EXTENT_DAMAGED (1U << 14)
#define EXTENT_NORESERVE (1U << 15)
+#define EXTENT_QGROUP_RESERVED (1U << 16)
#define EXTENT_IOBITS (EXTENT_LOCKED | EXTENT_WRITEBACK)
#define EXTENT_CTLBITS (EXTENT_DO_ACCOUNTING | EXTENT_FIRST_DELALLOC)
@@ -161,6 +163,17 @@ struct extent_buffer {
#endif
};
+/*
+ * Structure to record how many bytes and which ranges are set/cleared
+ */
+struct extent_changeset {
+ /* How many bytes are set/cleared in this operation */
+ u64 bytes_changed;
+
+ /* Changed ranges */
+ struct ulist *range_changed;
+};
+
static inline void extent_set_compress_type(unsigned long *bio_flags,
int compress_type)
{
@@ -210,11 +223,17 @@ int test_range_bit(struct extent_io_tree *tree, u64 start, u64 end,
struct extent_state *cached_state);
int clear_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
unsigned bits, gfp_t mask);
+int clear_record_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
+ unsigned bits, gfp_t mask,
+ struct extent_changeset *changeset);
int clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
unsigned bits, int wake, int delete,
struct extent_state **cached, gfp_t mask);
int set_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
unsigned bits, gfp_t mask);
+int set_record_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
+ unsigned bits, gfp_t mask,
+ struct extent_changeset *changeset);
int set_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
unsigned bits, u64 *failed_start,
struct extent_state **cached_state, gfp_t mask);
diff --git a/kernel/fs/btrfs/file.c b/kernel/fs/btrfs/file.c
index b072e1747..0f09526aa 100644
--- a/kernel/fs/btrfs/file.c
+++ b/kernel/fs/btrfs/file.c
@@ -756,8 +756,16 @@ next_slot:
}
btrfs_item_key_to_cpu(leaf, &key, path->slots[0]);
- if (key.objectid > ino ||
- key.type > BTRFS_EXTENT_DATA_KEY || key.offset >= end)
+
+ if (key.objectid > ino)
+ break;
+ if (WARN_ON_ONCE(key.objectid < ino) ||
+ key.type < BTRFS_EXTENT_DATA_KEY) {
+ ASSERT(del_nr == 0);
+ path->slots[0]++;
+ goto next_slot;
+ }
+ if (key.type > BTRFS_EXTENT_DATA_KEY || key.offset >= end)
break;
fi = btrfs_item_ptr(leaf, path->slots[0],
@@ -776,8 +784,8 @@ next_slot:
btrfs_file_extent_inline_len(leaf,
path->slots[0], fi);
} else {
- WARN_ON(1);
- extent_end = search_start;
+ /* can't happen */
+ BUG();
}
/*
@@ -847,7 +855,7 @@ next_slot:
disk_bytenr, num_bytes, 0,
root->root_key.objectid,
new_key.objectid,
- start - extent_offset, 1);
+ start - extent_offset);
BUG_ON(ret); /* -ENOMEM */
}
key.offset = start;
@@ -925,7 +933,7 @@ delete_extent_item:
disk_bytenr, num_bytes, 0,
root->root_key.objectid,
key.objectid, key.offset -
- extent_offset, 0);
+ extent_offset);
BUG_ON(ret); /* -ENOMEM */
inode_sub_bytes(inode,
extent_end - key.offset);
@@ -1204,7 +1212,7 @@ again:
ret = btrfs_inc_extent_ref(trans, root, bytenr, num_bytes, 0,
root->root_key.objectid,
- ino, orig_offset, 1);
+ ino, orig_offset);
BUG_ON(ret); /* -ENOMEM */
if (split == start) {
@@ -1231,7 +1239,7 @@ again:
del_nr++;
ret = btrfs_free_extent(trans, root, bytenr, num_bytes,
0, root->root_key.objectid,
- ino, orig_offset, 0);
+ ino, orig_offset);
BUG_ON(ret); /* -ENOMEM */
}
other_start = 0;
@@ -1248,7 +1256,7 @@ again:
del_nr++;
ret = btrfs_free_extent(trans, root, bytenr, num_bytes,
0, root->root_key.objectid,
- ino, orig_offset, 0);
+ ino, orig_offset);
BUG_ON(ret); /* -ENOMEM */
}
if (del_nr == 0) {
@@ -1283,7 +1291,8 @@ out:
* on error we return an unlocked page and the error value
* on success we return a locked page and 0
*/
-static int prepare_uptodate_page(struct page *page, u64 pos,
+static int prepare_uptodate_page(struct inode *inode,
+ struct page *page, u64 pos,
bool force_uptodate)
{
int ret = 0;
@@ -1298,6 +1307,10 @@ static int prepare_uptodate_page(struct page *page, u64 pos,
unlock_page(page);
return -EIO;
}
+ if (page->mapping != inode->i_mapping) {
+ unlock_page(page);
+ return -EAGAIN;
+ }
}
return 0;
}
@@ -1316,6 +1329,7 @@ static noinline int prepare_pages(struct inode *inode, struct page **pages,
int faili;
for (i = 0; i < num_pages; i++) {
+again:
pages[i] = find_or_create_page(inode->i_mapping, index + i,
mask | __GFP_WRITE);
if (!pages[i]) {
@@ -1325,13 +1339,17 @@ static noinline int prepare_pages(struct inode *inode, struct page **pages,
}
if (i == 0)
- err = prepare_uptodate_page(pages[i], pos,
+ err = prepare_uptodate_page(inode, pages[i], pos,
force_uptodate);
- if (i == num_pages - 1)
- err = prepare_uptodate_page(pages[i],
+ if (!err && i == num_pages - 1)
+ err = prepare_uptodate_page(inode, pages[i],
pos + write_bytes, false);
if (err) {
page_cache_release(pages[i]);
+ if (err == -EAGAIN) {
+ err = 0;
+ goto again;
+ }
faili = i - 1;
goto fail;
}
@@ -1469,7 +1487,6 @@ static noinline ssize_t __btrfs_buffered_write(struct file *file,
u64 release_bytes = 0;
u64 lockstart;
u64 lockend;
- unsigned long first_index;
size_t num_written = 0;
int nrptrs;
int ret = 0;
@@ -1485,8 +1502,6 @@ static noinline ssize_t __btrfs_buffered_write(struct file *file,
if (!pages)
return -ENOMEM;
- first_index = pos >> PAGE_CACHE_SHIFT;
-
while (iov_iter_count(i) > 0) {
size_t offset = pos & (PAGE_CACHE_SIZE - 1);
size_t write_bytes = min(iov_iter_count(i),
@@ -1510,12 +1525,17 @@ static noinline ssize_t __btrfs_buffered_write(struct file *file,
}
reserve_bytes = num_pages << PAGE_CACHE_SHIFT;
- ret = btrfs_check_data_free_space(inode, reserve_bytes, write_bytes);
- if (ret == -ENOSPC &&
- (BTRFS_I(inode)->flags & (BTRFS_INODE_NODATACOW |
- BTRFS_INODE_PREALLOC))) {
+
+ if (BTRFS_I(inode)->flags & (BTRFS_INODE_NODATACOW |
+ BTRFS_INODE_PREALLOC)) {
ret = check_can_nocow(inode, pos, &write_bytes);
+ if (ret < 0)
+ break;
if (ret > 0) {
+ /*
+ * For nodata cow case, no need to reserve
+ * data space.
+ */
only_release_metadata = true;
/*
* our prealloc extent may be smaller than
@@ -1524,20 +1544,19 @@ static noinline ssize_t __btrfs_buffered_write(struct file *file,
num_pages = DIV_ROUND_UP(write_bytes + offset,
PAGE_CACHE_SIZE);
reserve_bytes = num_pages << PAGE_CACHE_SHIFT;
- ret = 0;
- } else {
- ret = -ENOSPC;
+ goto reserve_metadata;
}
}
-
- if (ret)
+ ret = btrfs_check_data_free_space(inode, pos, write_bytes);
+ if (ret < 0)
break;
+reserve_metadata:
ret = btrfs_delalloc_reserve_metadata(inode, reserve_bytes);
if (ret) {
if (!only_release_metadata)
- btrfs_free_reserved_data_space(inode,
- reserve_bytes);
+ btrfs_free_reserved_data_space(inode, pos,
+ write_bytes);
else
btrfs_end_write_no_snapshoting(root);
break;
@@ -1603,12 +1622,17 @@ again:
BTRFS_I(inode)->outstanding_extents++;
spin_unlock(&BTRFS_I(inode)->lock);
}
- if (only_release_metadata)
+ if (only_release_metadata) {
btrfs_delalloc_release_metadata(inode,
release_bytes);
- else
- btrfs_delalloc_release_space(inode,
+ } else {
+ u64 __pos;
+
+ __pos = round_down(pos, root->sectorsize) +
+ (dirty_pages << PAGE_CACHE_SHIFT);
+ btrfs_delalloc_release_space(inode, __pos,
release_bytes);
+ }
}
release_bytes = dirty_pages << PAGE_CACHE_SHIFT;
@@ -1660,7 +1684,7 @@ again:
btrfs_end_write_no_snapshoting(root);
btrfs_delalloc_release_metadata(inode, release_bytes);
} else {
- btrfs_delalloc_release_space(inode, release_bytes);
+ btrfs_delalloc_release_space(inode, pos, release_bytes);
}
}
@@ -1748,7 +1772,7 @@ static ssize_t btrfs_file_write_iter(struct kiocb *iocb,
}
current->backing_dev_info = inode_to_bdi(inode);
- err = file_remove_suid(file);
+ err = file_remove_privs(file);
if (err) {
mutex_unlock(&inode->i_mutex);
goto out;
@@ -1868,7 +1892,13 @@ int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
struct btrfs_log_ctx ctx;
int ret = 0;
bool full_sync = 0;
+ u64 len;
+ /*
+ * The range length can be represented by u64, we have to do the typecasts
+ * to avoid signed overflow if it's [0, LLONG_MAX] eg. from fsync()
+ */
+ len = (u64)end - (u64)start + 1;
trace_btrfs_sync_file(file, datasync);
/*
@@ -1896,7 +1926,7 @@ int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
* all extents are persisted and the respective file extent
* items are in the fs/subvol btree.
*/
- ret = btrfs_wait_ordered_range(inode, start, end - start + 1);
+ ret = btrfs_wait_ordered_range(inode, start, len);
} else {
/*
* Start any new ordered operations before starting to log the
@@ -1968,8 +1998,10 @@ int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
*/
smp_mb();
if (btrfs_inode_in_log(inode, root->fs_info->generation) ||
- (full_sync && BTRFS_I(inode)->last_trans <=
- root->fs_info->last_trans_committed)) {
+ (BTRFS_I(inode)->last_trans <=
+ root->fs_info->last_trans_committed &&
+ (full_sync ||
+ !btrfs_have_ordered_extents_in_range(inode, start, len)))) {
/*
* We'v had everything committed since the last time we were
* modified so clear this flag in case it was set for whatever
@@ -2054,8 +2086,7 @@ int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
}
}
if (!full_sync) {
- ret = btrfs_wait_ordered_range(inode, start,
- end - start + 1);
+ ret = btrfs_wait_ordered_range(inode, start, len);
if (ret) {
btrfs_end_transaction(trans, root);
goto out;
@@ -2263,7 +2294,7 @@ static int btrfs_punch_hole(struct inode *inode, loff_t offset, loff_t len)
u64 drop_end;
int ret = 0;
int err = 0;
- int rsv_count;
+ unsigned int rsv_count;
bool same_page;
bool no_holes = btrfs_fs_incompat(root->fs_info, NO_HOLES);
u64 ino_size;
@@ -2485,6 +2516,19 @@ static int btrfs_punch_hole(struct inode *inode, loff_t offset, loff_t len)
trans->block_rsv = &root->fs_info->trans_block_rsv;
/*
+ * If we are using the NO_HOLES feature we might have had already an
+ * hole that overlaps a part of the region [lockstart, lockend] and
+ * ends at (or beyond) lockend. Since we have no file extent items to
+ * represent holes, drop_end can be less than lockend and so we must
+ * make sure we have an extent map representing the existing hole (the
+ * call to __btrfs_drop_extents() might have dropped the existing extent
+ * map representing the existing hole), otherwise the fast fsync path
+ * will not record the existence of the hole region
+ * [existing_hole_start, lockend].
+ */
+ if (drop_end <= lockend)
+ drop_end = lockend + 1;
+ /*
* Don't insert file hole extent item if it's for a range beyond eof
* (because it's useless) or if it represents a 0 bytes range (when
* cur_offset == drop_end).
@@ -2538,17 +2582,61 @@ out_only_mutex:
return err;
}
+/* Helper structure to record which range is already reserved */
+struct falloc_range {
+ struct list_head list;
+ u64 start;
+ u64 len;
+};
+
+/*
+ * Helper function to add falloc range
+ *
+ * Caller should have locked the larger range of extent containing
+ * [start, len)
+ */
+static int add_falloc_range(struct list_head *head, u64 start, u64 len)
+{
+ struct falloc_range *prev = NULL;
+ struct falloc_range *range = NULL;
+
+ if (list_empty(head))
+ goto insert;
+
+ /*
+ * As fallocate iterate by bytenr order, we only need to check
+ * the last range.
+ */
+ prev = list_entry(head->prev, struct falloc_range, list);
+ if (prev->start + prev->len == start) {
+ prev->len += len;
+ return 0;
+ }
+insert:
+ range = kmalloc(sizeof(*range), GFP_NOFS);
+ if (!range)
+ return -ENOMEM;
+ range->start = start;
+ range->len = len;
+ list_add_tail(&range->list, head);
+ return 0;
+}
+
static long btrfs_fallocate(struct file *file, int mode,
loff_t offset, loff_t len)
{
struct inode *inode = file_inode(file);
struct extent_state *cached_state = NULL;
+ struct falloc_range *range;
+ struct falloc_range *tmp;
+ struct list_head reserve_list;
u64 cur_offset;
u64 last_byte;
u64 alloc_start;
u64 alloc_end;
u64 alloc_hint = 0;
u64 locked_end;
+ u64 actual_end = 0;
struct extent_map *em;
int blocksize = BTRFS_I(inode)->root->sectorsize;
int ret;
@@ -2564,11 +2652,12 @@ static long btrfs_fallocate(struct file *file, int mode,
return btrfs_punch_hole(inode, offset, len);
/*
- * Make sure we have enough space before we do the
- * allocation.
+ * Only trigger disk allocation, don't trigger qgroup reserve
+ *
+ * For qgroup space, it will be checked later.
*/
- ret = btrfs_check_data_free_space(inode, alloc_end - alloc_start, alloc_end - alloc_start);
- if (ret)
+ ret = btrfs_alloc_data_chunk_ondemand(inode, alloc_end - alloc_start);
+ if (ret < 0)
return ret;
mutex_lock(&inode->i_mutex);
@@ -2576,12 +2665,19 @@ static long btrfs_fallocate(struct file *file, int mode,
if (ret)
goto out;
+ /*
+ * TODO: Move these two operations after we have checked
+ * accurate reserved space, or fallocate can still fail but
+ * with page truncated or size expanded.
+ *
+ * But that's a minor problem and won't do much harm BTW.
+ */
if (alloc_start > inode->i_size) {
ret = btrfs_cont_expand(inode, i_size_read(inode),
alloc_start);
if (ret)
goto out;
- } else {
+ } else if (offset + len > inode->i_size) {
/*
* If we are fallocating from the end of the file onward we
* need to zero out the end of the page if i_size lands in the
@@ -2634,10 +2730,10 @@ static long btrfs_fallocate(struct file *file, int mode,
}
}
+ /* First, check if we exceed the qgroup limit */
+ INIT_LIST_HEAD(&reserve_list);
cur_offset = alloc_start;
while (1) {
- u64 actual_end;
-
em = btrfs_get_extent(inode, NULL, 0, cur_offset,
alloc_end - cur_offset, 0);
if (IS_ERR_OR_NULL(em)) {
@@ -2650,57 +2746,82 @@ static long btrfs_fallocate(struct file *file, int mode,
last_byte = min(extent_map_end(em), alloc_end);
actual_end = min_t(u64, extent_map_end(em), offset + len);
last_byte = ALIGN(last_byte, blocksize);
-
if (em->block_start == EXTENT_MAP_HOLE ||
(cur_offset >= inode->i_size &&
!test_bit(EXTENT_FLAG_PREALLOC, &em->flags))) {
- ret = btrfs_prealloc_file_range(inode, mode, cur_offset,
- last_byte - cur_offset,
- 1 << inode->i_blkbits,
- offset + len,
- &alloc_hint);
- } else if (actual_end > inode->i_size &&
- !(mode & FALLOC_FL_KEEP_SIZE)) {
- struct btrfs_trans_handle *trans;
- struct btrfs_root *root = BTRFS_I(inode)->root;
-
- /*
- * We didn't need to allocate any more space, but we
- * still extended the size of the file so we need to
- * update i_size and the inode item.
- */
- trans = btrfs_start_transaction(root, 1);
- if (IS_ERR(trans)) {
- ret = PTR_ERR(trans);
- } else {
- inode->i_ctime = CURRENT_TIME;
- i_size_write(inode, actual_end);
- btrfs_ordered_update_i_size(inode, actual_end,
- NULL);
- ret = btrfs_update_inode(trans, root, inode);
- if (ret)
- btrfs_end_transaction(trans, root);
- else
- ret = btrfs_end_transaction(trans,
- root);
+ ret = add_falloc_range(&reserve_list, cur_offset,
+ last_byte - cur_offset);
+ if (ret < 0) {
+ free_extent_map(em);
+ break;
}
+ ret = btrfs_qgroup_reserve_data(inode, cur_offset,
+ last_byte - cur_offset);
+ if (ret < 0)
+ break;
}
free_extent_map(em);
- if (ret < 0)
- break;
-
cur_offset = last_byte;
- if (cur_offset >= alloc_end) {
- ret = 0;
+ if (cur_offset >= alloc_end)
break;
+ }
+
+ /*
+ * If ret is still 0, means we're OK to fallocate.
+ * Or just cleanup the list and exit.
+ */
+ list_for_each_entry_safe(range, tmp, &reserve_list, list) {
+ if (!ret)
+ ret = btrfs_prealloc_file_range(inode, mode,
+ range->start,
+ range->len, 1 << inode->i_blkbits,
+ offset + len, &alloc_hint);
+ list_del(&range->list);
+ kfree(range);
+ }
+ if (ret < 0)
+ goto out_unlock;
+
+ if (actual_end > inode->i_size &&
+ !(mode & FALLOC_FL_KEEP_SIZE)) {
+ struct btrfs_trans_handle *trans;
+ struct btrfs_root *root = BTRFS_I(inode)->root;
+
+ /*
+ * We didn't need to allocate any more space, but we
+ * still extended the size of the file so we need to
+ * update i_size and the inode item.
+ */
+ trans = btrfs_start_transaction(root, 1);
+ if (IS_ERR(trans)) {
+ ret = PTR_ERR(trans);
+ } else {
+ inode->i_ctime = CURRENT_TIME;
+ i_size_write(inode, actual_end);
+ btrfs_ordered_update_i_size(inode, actual_end, NULL);
+ ret = btrfs_update_inode(trans, root, inode);
+ if (ret)
+ btrfs_end_transaction(trans, root);
+ else
+ ret = btrfs_end_transaction(trans, root);
}
}
+out_unlock:
unlock_extent_cached(&BTRFS_I(inode)->io_tree, alloc_start, locked_end,
&cached_state, GFP_NOFS);
out:
+ /*
+ * As we waited the extent range, the data_rsv_map must be empty
+ * in the range, as written data range will be released from it.
+ * And for prealloacted extent, it will also be released when
+ * its metadata is written.
+ * So this is completely used as cleanup.
+ */
+ btrfs_qgroup_free_data(inode, alloc_start, alloc_end - alloc_start);
mutex_unlock(&inode->i_mutex);
/* Let go of our reservation. */
- btrfs_free_reserved_data_space(inode, alloc_end - alloc_start);
+ btrfs_free_reserved_data_space(inode, alloc_start,
+ alloc_end - alloc_start);
return ret;
}
diff --git a/kernel/fs/btrfs/free-space-cache.c b/kernel/fs/btrfs/free-space-cache.c
index 9dbe5b548..cfe99bec4 100644
--- a/kernel/fs/btrfs/free-space-cache.c
+++ b/kernel/fs/btrfs/free-space-cache.c
@@ -85,8 +85,8 @@ static struct inode *__lookup_free_space_inode(struct btrfs_root *root,
}
mapping_set_gfp_mask(inode->i_mapping,
- mapping_gfp_mask(inode->i_mapping) &
- ~(__GFP_FS | __GFP_HIGHMEM));
+ mapping_gfp_constraint(inode->i_mapping,
+ ~(__GFP_FS | __GFP_HIGHMEM)));
return inode;
}
@@ -231,6 +231,7 @@ int btrfs_truncate_free_space_cache(struct btrfs_root *root,
{
int ret = 0;
struct btrfs_path *path = btrfs_alloc_path();
+ bool locked = false;
if (!path) {
ret = -ENOMEM;
@@ -238,6 +239,7 @@ int btrfs_truncate_free_space_cache(struct btrfs_root *root,
}
if (block_group) {
+ locked = true;
mutex_lock(&trans->transaction->cache_write_mutex);
if (!list_empty(&block_group->io_list)) {
list_del_init(&block_group->io_list);
@@ -269,18 +271,14 @@ int btrfs_truncate_free_space_cache(struct btrfs_root *root,
*/
ret = btrfs_truncate_inode_items(trans, root, inode,
0, BTRFS_EXTENT_DATA_KEY);
- if (ret) {
- mutex_unlock(&trans->transaction->cache_write_mutex);
- btrfs_abort_transaction(trans, root, ret);
- return ret;
- }
+ if (ret)
+ goto fail;
ret = btrfs_update_inode(trans, root, inode);
- if (block_group)
- mutex_unlock(&trans->transaction->cache_write_mutex);
-
fail:
+ if (locked)
+ mutex_unlock(&trans->transaction->cache_write_mutex);
if (ret)
btrfs_abort_transaction(trans, root, ret);
@@ -452,9 +450,9 @@ static int io_ctl_check_generation(struct btrfs_io_ctl *io_ctl, u64 generation)
gen = io_ctl->cur;
if (le64_to_cpu(*gen) != generation) {
- printk_ratelimited(KERN_ERR "BTRFS: space cache generation "
- "(%Lu) does not match inode (%Lu)\n", *gen,
- generation);
+ btrfs_err_rl(io_ctl->root->fs_info,
+ "space cache generation (%llu) does not match inode (%llu)",
+ *gen, generation);
io_ctl_unmap_page(io_ctl);
return -EIO;
}
@@ -508,8 +506,8 @@ static int io_ctl_check_crc(struct btrfs_io_ctl *io_ctl, int index)
PAGE_CACHE_SIZE - offset);
btrfs_csum_final(crc, (char *)&crc);
if (val != crc) {
- printk_ratelimited(KERN_ERR "BTRFS: csum mismatch on free "
- "space cache\n");
+ btrfs_err_rl(io_ctl->root->fs_info,
+ "csum mismatch on free space cache");
io_ctl_unmap_page(io_ctl);
return -EIO;
}
@@ -893,7 +891,7 @@ out:
spin_unlock(&block_group->lock);
ret = 0;
- btrfs_warn(fs_info, "failed to load free space cache for block group %llu, rebuild it now",
+ btrfs_warn(fs_info, "failed to load free space cache for block group %llu, rebuilding it now",
block_group->key.objectid);
}
@@ -1217,7 +1215,7 @@ out:
* @offset - the offset for the key we'll insert
*
* This function writes out a free space cache struct to disk for quick recovery
- * on mount. This will return 0 if it was successfull in writing the cache out,
+ * on mount. This will return 0 if it was successful in writing the cache out,
* or an errno if it was not.
*/
static int __btrfs_write_out_cache(struct btrfs_root *root, struct inode *inode,
@@ -1732,7 +1730,7 @@ static void bitmap_set_bits(struct btrfs_free_space_ctl *ctl,
*/
static int search_bitmap(struct btrfs_free_space_ctl *ctl,
struct btrfs_free_space *bitmap_info, u64 *offset,
- u64 *bytes)
+ u64 *bytes, bool for_alloc)
{
unsigned long found_bits = 0;
unsigned long max_bits = 0;
@@ -1740,11 +1738,26 @@ static int search_bitmap(struct btrfs_free_space_ctl *ctl,
unsigned long next_zero;
unsigned long extent_bits;
+ /*
+ * Skip searching the bitmap if we don't have a contiguous section that
+ * is large enough for this allocation.
+ */
+ if (for_alloc &&
+ bitmap_info->max_extent_size &&
+ bitmap_info->max_extent_size < *bytes) {
+ *bytes = bitmap_info->max_extent_size;
+ return -1;
+ }
+
i = offset_to_bit(bitmap_info->offset, ctl->unit,
max_t(u64, *offset, bitmap_info->offset));
bits = bytes_to_bits(*bytes, ctl->unit);
for_each_set_bit_from(i, bitmap_info->bitmap, BITS_PER_BITMAP) {
+ if (for_alloc && bits == 1) {
+ found_bits = 1;
+ break;
+ }
next_zero = find_next_zero_bit(bitmap_info->bitmap,
BITS_PER_BITMAP, i);
extent_bits = next_zero - i;
@@ -1764,6 +1777,7 @@ static int search_bitmap(struct btrfs_free_space_ctl *ctl,
}
*bytes = (u64)(max_bits) * ctl->unit;
+ bitmap_info->max_extent_size = *bytes;
return -1;
}
@@ -1815,7 +1829,7 @@ find_free_space(struct btrfs_free_space_ctl *ctl, u64 *offset, u64 *bytes,
if (entry->bitmap) {
u64 size = *bytes;
- ret = search_bitmap(ctl, entry, &tmp, &size);
+ ret = search_bitmap(ctl, entry, &tmp, &size, true);
if (!ret) {
*offset = tmp;
*bytes = size;
@@ -1876,7 +1890,8 @@ again:
search_start = *offset;
search_bytes = ctl->unit;
search_bytes = min(search_bytes, end - search_start + 1);
- ret = search_bitmap(ctl, bitmap_info, &search_start, &search_bytes);
+ ret = search_bitmap(ctl, bitmap_info, &search_start, &search_bytes,
+ false);
if (ret < 0 || search_start != *offset)
return -EINVAL;
@@ -1921,7 +1936,7 @@ again:
search_start = *offset;
search_bytes = ctl->unit;
ret = search_bitmap(ctl, bitmap_info, &search_start,
- &search_bytes);
+ &search_bytes, false);
if (ret < 0 || search_start != *offset)
return -EAGAIN;
@@ -1945,6 +1960,12 @@ static u64 add_bytes_to_bitmap(struct btrfs_free_space_ctl *ctl,
bitmap_set_bits(ctl, info, offset, bytes_to_set);
+ /*
+ * We set some bytes, we have no idea what the max extent size is
+ * anymore.
+ */
+ info->max_extent_size = 0;
+
return bytes_to_set;
}
@@ -1953,12 +1974,19 @@ static bool use_bitmap(struct btrfs_free_space_ctl *ctl,
struct btrfs_free_space *info)
{
struct btrfs_block_group_cache *block_group = ctl->private;
+ bool forced = false;
+
+#ifdef CONFIG_BTRFS_DEBUG
+ if (btrfs_should_fragment_free_space(block_group->fs_info->extent_root,
+ block_group))
+ forced = true;
+#endif
/*
* If we are below the extents threshold then we can add this as an
* extent, and don't have to deal with the bitmap
*/
- if (ctl->free_extents < ctl->extents_thresh) {
+ if (!forced && ctl->free_extents < ctl->extents_thresh) {
/*
* If this block group has some small extents we don't want to
* use up all of our free slots in the cache with them, we want
@@ -2663,7 +2691,7 @@ static u64 btrfs_alloc_from_bitmap(struct btrfs_block_group_cache *block_group,
search_start = min_start;
search_bytes = bytes;
- err = search_bitmap(ctl, entry, &search_start, &search_bytes);
+ err = search_bitmap(ctl, entry, &search_start, &search_bytes, true);
if (err) {
if (search_bytes > *max_extent_size)
*max_extent_size = search_bytes;
@@ -2777,6 +2805,7 @@ static int btrfs_bitmap_cluster(struct btrfs_block_group_cache *block_group,
unsigned long want_bits;
unsigned long min_bits;
unsigned long found_bits;
+ unsigned long max_bits = 0;
unsigned long start = 0;
unsigned long total_found = 0;
int ret;
@@ -2786,6 +2815,13 @@ static int btrfs_bitmap_cluster(struct btrfs_block_group_cache *block_group,
want_bits = bytes_to_bits(bytes, ctl->unit);
min_bits = bytes_to_bits(min_bytes, ctl->unit);
+ /*
+ * Don't bother looking for a cluster in this bitmap if it's heavily
+ * fragmented.
+ */
+ if (entry->max_extent_size &&
+ entry->max_extent_size < cont1_bytes)
+ return -ENOSPC;
again:
found_bits = 0;
for_each_set_bit_from(i, entry->bitmap, BITS_PER_BITMAP) {
@@ -2793,13 +2829,19 @@ again:
BITS_PER_BITMAP, i);
if (next_zero - i >= min_bits) {
found_bits = next_zero - i;
+ if (found_bits > max_bits)
+ max_bits = found_bits;
break;
}
+ if (next_zero - i > max_bits)
+ max_bits = next_zero - i;
i = next_zero;
}
- if (!found_bits)
+ if (!found_bits) {
+ entry->max_extent_size = (u64)max_bits * ctl->unit;
return -ENOSPC;
+ }
if (!total_found) {
start = i;
@@ -2930,7 +2972,7 @@ setup_cluster_bitmap(struct btrfs_block_group_cache *block_group,
u64 cont1_bytes, u64 min_bytes)
{
struct btrfs_free_space_ctl *ctl = block_group->free_space_ctl;
- struct btrfs_free_space *entry;
+ struct btrfs_free_space *entry = NULL;
int ret = -ENOSPC;
u64 bitmap_offset = offset_to_bitmap(ctl, offset);
@@ -2941,8 +2983,10 @@ setup_cluster_bitmap(struct btrfs_block_group_cache *block_group,
* The bitmap that covers offset won't be in the list unless offset
* is just its start offset.
*/
- entry = list_first_entry(bitmaps, struct btrfs_free_space, list);
- if (entry->offset != bitmap_offset) {
+ if (!list_empty(bitmaps))
+ entry = list_first_entry(bitmaps, struct btrfs_free_space, list);
+
+ if (!entry || entry->offset != bitmap_offset) {
entry = tree_search_offset(ctl, bitmap_offset, 1, 0);
if (entry && list_empty(&entry->list))
list_add(&entry->list, bitmaps);
@@ -3058,6 +3102,7 @@ void btrfs_init_free_cluster(struct btrfs_free_cluster *cluster)
spin_lock_init(&cluster->refill_lock);
cluster->root = RB_ROOT;
cluster->max_size = 0;
+ cluster->fragmented = false;
INIT_LIST_HEAD(&cluster->block_group_list);
cluster->block_group = NULL;
}
@@ -3225,7 +3270,7 @@ static int trim_bitmaps(struct btrfs_block_group_cache *block_group,
}
bytes = minlen;
- ret2 = search_bitmap(ctl, entry, &start, &bytes);
+ ret2 = search_bitmap(ctl, entry, &start, &bytes, false);
if (ret2 || start >= end) {
spin_unlock(&ctl->tree_lock);
mutex_unlock(&ctl->cache_writeout_mutex);
@@ -3274,35 +3319,23 @@ next:
return ret;
}
-int btrfs_trim_block_group(struct btrfs_block_group_cache *block_group,
- u64 *trimmed, u64 start, u64 end, u64 minlen)
+void btrfs_get_block_group_trimming(struct btrfs_block_group_cache *cache)
{
- int ret;
+ atomic_inc(&cache->trimming);
+}
- *trimmed = 0;
+void btrfs_put_block_group_trimming(struct btrfs_block_group_cache *block_group)
+{
+ struct extent_map_tree *em_tree;
+ struct extent_map *em;
+ bool cleanup;
spin_lock(&block_group->lock);
- if (block_group->removed) {
- spin_unlock(&block_group->lock);
- return 0;
- }
- atomic_inc(&block_group->trimming);
+ cleanup = (atomic_dec_and_test(&block_group->trimming) &&
+ block_group->removed);
spin_unlock(&block_group->lock);
- ret = trim_no_bitmap(block_group, trimmed, start, end, minlen);
- if (ret)
- goto out;
-
- ret = trim_bitmaps(block_group, trimmed, start, end, minlen);
-out:
- spin_lock(&block_group->lock);
- if (atomic_dec_and_test(&block_group->trimming) &&
- block_group->removed) {
- struct extent_map_tree *em_tree;
- struct extent_map *em;
-
- spin_unlock(&block_group->lock);
-
+ if (cleanup) {
lock_chunks(block_group->fs_info->chunk_root);
em_tree = &block_group->fs_info->mapping_tree.map_tree;
write_lock(&em_tree->lock);
@@ -3326,10 +3359,31 @@ out:
* this block group have left 1 entry each one. Free them.
*/
__btrfs_remove_free_space_cache(block_group->free_space_ctl);
- } else {
+ }
+}
+
+int btrfs_trim_block_group(struct btrfs_block_group_cache *block_group,
+ u64 *trimmed, u64 start, u64 end, u64 minlen)
+{
+ int ret;
+
+ *trimmed = 0;
+
+ spin_lock(&block_group->lock);
+ if (block_group->removed) {
spin_unlock(&block_group->lock);
+ return 0;
}
+ btrfs_get_block_group_trimming(block_group);
+ spin_unlock(&block_group->lock);
+ ret = trim_no_bitmap(block_group, trimmed, start, end, minlen);
+ if (ret)
+ goto out;
+
+ ret = trim_bitmaps(block_group, trimmed, start, end, minlen);
+out:
+ btrfs_put_block_group_trimming(block_group);
return ret;
}
@@ -3369,7 +3423,7 @@ u64 btrfs_find_ino_for_alloc(struct btrfs_root *fs_root)
u64 count = 1;
int ret;
- ret = search_bitmap(ctl, entry, &offset, &count);
+ ret = search_bitmap(ctl, entry, &offset, &count, true);
/* Logic error; Should be empty if it can't find anything */
ASSERT(!ret);
@@ -3525,6 +3579,7 @@ again:
spin_lock(&ctl->tree_lock);
info->offset = offset;
info->bytes = bytes;
+ info->max_extent_size = 0;
ret = link_free_space(ctl, info);
spin_unlock(&ctl->tree_lock);
if (ret)
@@ -3552,6 +3607,7 @@ again:
}
bytes_added = add_bytes_to_bitmap(ctl, bitmap_info, offset, bytes);
+
bytes -= bytes_added;
offset += bytes_added;
spin_unlock(&ctl->tree_lock);
@@ -3595,7 +3651,7 @@ have_info:
bit_off = offset;
bit_bytes = ctl->unit;
- ret = search_bitmap(ctl, info, &bit_off, &bit_bytes);
+ ret = search_bitmap(ctl, info, &bit_off, &bit_bytes, false);
if (!ret) {
if (bit_off == offset) {
ret = 1;
diff --git a/kernel/fs/btrfs/free-space-cache.h b/kernel/fs/btrfs/free-space-cache.h
index a16a029ad..f251865eb 100644
--- a/kernel/fs/btrfs/free-space-cache.h
+++ b/kernel/fs/btrfs/free-space-cache.h
@@ -23,6 +23,7 @@ struct btrfs_free_space {
struct rb_node offset_index;
u64 offset;
u64 bytes;
+ u64 max_extent_size;
unsigned long *bitmap;
struct list_head list;
};
diff --git a/kernel/fs/btrfs/inode-item.c b/kernel/fs/btrfs/inode-item.c
index 265e03c73..be4d22a50 100644
--- a/kernel/fs/btrfs/inode-item.c
+++ b/kernel/fs/btrfs/inode-item.c
@@ -157,7 +157,7 @@ static int btrfs_del_inode_extref(struct btrfs_trans_handle *trans,
*/
if (!btrfs_find_name_in_ext_backref(path, ref_objectid,
name, name_len, &extref)) {
- btrfs_std_error(root->fs_info, -ENOENT);
+ btrfs_std_error(root->fs_info, -ENOENT, NULL);
ret = -EROFS;
goto out;
}
diff --git a/kernel/fs/btrfs/inode-map.c b/kernel/fs/btrfs/inode-map.c
index d4a582ac3..07573dc16 100644
--- a/kernel/fs/btrfs/inode-map.c
+++ b/kernel/fs/btrfs/inode-map.c
@@ -488,17 +488,17 @@ again:
/* Just to make sure we have enough space */
prealloc += 8 * PAGE_CACHE_SIZE;
- ret = btrfs_delalloc_reserve_space(inode, prealloc);
+ ret = btrfs_delalloc_reserve_space(inode, 0, prealloc);
if (ret)
goto out_put;
ret = btrfs_prealloc_file_range_trans(inode, trans, 0, 0, prealloc,
prealloc, prealloc, &alloc_hint);
if (ret) {
- btrfs_delalloc_release_space(inode, prealloc);
+ btrfs_delalloc_release_space(inode, 0, prealloc);
goto out_put;
}
- btrfs_free_reserved_data_space(inode, prealloc);
+ btrfs_free_reserved_data_space(inode, 0, prealloc);
ret = btrfs_write_out_ino_cache(root, trans, path, inode);
out_put:
@@ -515,7 +515,7 @@ out:
return ret;
}
-static int btrfs_find_highest_objectid(struct btrfs_root *root, u64 *objectid)
+int btrfs_find_highest_objectid(struct btrfs_root *root, u64 *objectid)
{
struct btrfs_path *path;
int ret;
@@ -555,13 +555,6 @@ int btrfs_find_free_objectid(struct btrfs_root *root, u64 *objectid)
int ret;
mutex_lock(&root->objectid_mutex);
- if (unlikely(root->highest_objectid < BTRFS_FIRST_FREE_OBJECTID)) {
- ret = btrfs_find_highest_objectid(root,
- &root->highest_objectid);
- if (ret)
- goto out;
- }
-
if (unlikely(root->highest_objectid >= BTRFS_LAST_FREE_OBJECTID)) {
ret = -ENOSPC;
goto out;
diff --git a/kernel/fs/btrfs/inode-map.h b/kernel/fs/btrfs/inode-map.h
index ddb347bfe..c8e864b2d 100644
--- a/kernel/fs/btrfs/inode-map.h
+++ b/kernel/fs/btrfs/inode-map.h
@@ -9,5 +9,6 @@ int btrfs_save_ino_cache(struct btrfs_root *root,
struct btrfs_trans_handle *trans);
int btrfs_find_free_objectid(struct btrfs_root *root, u64 *objectid);
+int btrfs_find_highest_objectid(struct btrfs_root *root, u64 *objectid);
#endif
diff --git a/kernel/fs/btrfs/inode.c b/kernel/fs/btrfs/inode.c
index 8bb013672..4bc9dbf29 100644
--- a/kernel/fs/btrfs/inode.c
+++ b/kernel/fs/btrfs/inode.c
@@ -310,6 +310,13 @@ static noinline int cow_file_range_inline(struct btrfs_root *root,
btrfs_delalloc_release_metadata(inode, end + 1 - start);
btrfs_drop_extent_cache(inode, start, aligned_end - 1, 0);
out:
+ /*
+ * Don't forget to free the reserved space, as for inlined extent
+ * it won't count as data extent, free them directly here.
+ * And at reserve time, it's always aligned to page size, so
+ * just free one page here.
+ */
+ btrfs_qgroup_free_data(inode, 0, PAGE_CACHE_SIZE);
btrfs_free_path(path);
btrfs_end_transaction(trans, root);
return ret;
@@ -1096,6 +1103,9 @@ static noinline void async_cow_submit(struct btrfs_work *work)
nr_pages = (async_cow->end - async_cow->start + PAGE_CACHE_SIZE) >>
PAGE_CACHE_SHIFT;
+ /*
+ * atomic_sub_return implies a barrier for waitqueue_active
+ */
if (atomic_sub_return(nr_pages, &root->fs_info->async_delalloc_pages) <
5 * 1024 * 1024 &&
waitqueue_active(&root->fs_info->async_submit_wait))
@@ -1294,8 +1304,14 @@ next_slot:
num_bytes = 0;
btrfs_item_key_to_cpu(leaf, &found_key, path->slots[0]);
- if (found_key.objectid > ino ||
- found_key.type > BTRFS_EXTENT_DATA_KEY ||
+ if (found_key.objectid > ino)
+ break;
+ if (WARN_ON_ONCE(found_key.objectid < ino) ||
+ found_key.type < BTRFS_EXTENT_DATA_KEY) {
+ path->slots[0]++;
+ goto next_slot;
+ }
+ if (found_key.type > BTRFS_EXTENT_DATA_KEY ||
found_key.offset > end)
break;
@@ -1766,7 +1782,8 @@ static void btrfs_clear_bit_hook(struct inode *inode,
if (root->root_key.objectid != BTRFS_DATA_RELOC_TREE_OBJECTID
&& do_list && !(state->state & EXTENT_NORESERVE))
- btrfs_free_reserved_data_space(inode, len);
+ btrfs_free_reserved_data_space_noquota(inode,
+ state->start, len);
__percpu_counter_add(&root->fs_info->delalloc_bytes, -len,
root->fs_info->delalloc_batch);
@@ -1845,8 +1862,10 @@ static int __btrfs_submit_bio_done(struct inode *inode, int rw, struct bio *bio,
int ret;
ret = btrfs_map_bio(root, rw, bio, mirror_num, 1);
- if (ret)
- bio_endio(bio, ret);
+ if (ret) {
+ bio->bi_error = ret;
+ bio_endio(bio);
+ }
return ret;
}
@@ -1859,15 +1878,15 @@ static int btrfs_submit_bio_hook(struct inode *inode, int rw, struct bio *bio,
u64 bio_offset)
{
struct btrfs_root *root = BTRFS_I(inode)->root;
+ enum btrfs_wq_endio_type metadata = BTRFS_WQ_ENDIO_DATA;
int ret = 0;
int skip_sum;
- int metadata = 0;
int async = !atomic_read(&BTRFS_I(inode)->sync_writers);
skip_sum = BTRFS_I(inode)->flags & BTRFS_INODE_NODATASUM;
if (btrfs_is_free_space_inode(inode))
- metadata = 2;
+ metadata = BTRFS_WQ_ENDIO_FREE_SPACE;
if (!(rw & REQ_WRITE)) {
ret = btrfs_bio_wq_end_io(root->fs_info, bio, metadata);
@@ -1906,8 +1925,10 @@ mapit:
ret = btrfs_map_bio(root, rw, bio, mirror_num, 0);
out:
- if (ret < 0)
- bio_endio(bio, ret);
+ if (ret < 0) {
+ bio->bi_error = ret;
+ bio_endio(bio);
+ }
return ret;
}
@@ -1985,7 +2006,8 @@ again:
goto again;
}
- ret = btrfs_delalloc_reserve_space(inode, PAGE_CACHE_SIZE);
+ ret = btrfs_delalloc_reserve_space(inode, page_start,
+ PAGE_CACHE_SIZE);
if (ret) {
mapping_set_error(page->mapping, ret);
end_extent_writepage(page, ret, page_start, page_end);
@@ -2111,7 +2133,13 @@ static int insert_reserved_file_extent(struct btrfs_trans_handle *trans,
ins.type = BTRFS_EXTENT_ITEM_KEY;
ret = btrfs_alloc_reserved_file_extent(trans, root,
root->root_key.objectid,
- btrfs_ino(inode), file_pos, &ins);
+ btrfs_ino(inode), file_pos,
+ ram_bytes, &ins);
+ /*
+ * Release the reserved range from inode dirty range map, as it is
+ * already moved into delayed_ref_head
+ */
+ btrfs_qgroup_release_data(inode, file_pos, ram_bytes);
out:
btrfs_free_path(path);
@@ -2569,7 +2597,7 @@ again:
ret = btrfs_inc_extent_ref(trans, root, new->bytenr,
new->disk_len, 0,
backref->root_id, backref->inum,
- new->file_pos, 0); /* start - extent_offset */
+ new->file_pos); /* start - extent_offset */
if (ret) {
btrfs_abort_transaction(trans, root, ret);
goto out_free_path;
@@ -2595,7 +2623,6 @@ static void free_sa_defrag_extent(struct new_sa_defrag_extent *new)
return;
list_for_each_entry_safe(old, tmp, &new->head, list) {
- list_del(&old->list);
kfree(old);
}
kfree(new);
@@ -2820,6 +2847,14 @@ static int btrfs_finish_ordered_io(struct btrfs_ordered_extent *ordered_extent)
if (test_bit(BTRFS_ORDERED_NOCOW, &ordered_extent->flags)) {
BUG_ON(!list_empty(&ordered_extent->list)); /* Logic error */
+
+ /*
+ * For mwrite(mmap + memset to write) case, we still reserve
+ * space for NOCOW range.
+ * As NOCOW won't cause a new delayed ref, just free the space
+ */
+ btrfs_qgroup_free_data(inode, ordered_extent->file_offset,
+ ordered_extent->len);
btrfs_ordered_update_i_size(inode, 0, ordered_extent);
if (nolock)
trans = btrfs_join_transaction_nolock(root);
@@ -3014,8 +3049,6 @@ static int __readpage_endio_check(struct inode *inode,
char *kaddr;
u32 csum_expected;
u32 csum = ~(u32)0;
- static DEFINE_RATELIMIT_STATE(_rs, DEFAULT_RATELIMIT_INTERVAL,
- DEFAULT_RATELIMIT_BURST);
csum_expected = *(((u32 *)io_bio->csum) + icsum);
@@ -3028,9 +3061,8 @@ static int __readpage_endio_check(struct inode *inode,
kunmap_atomic(kaddr);
return 0;
zeroit:
- if (__ratelimit(&_rs))
- btrfs_warn(BTRFS_I(inode)->root->fs_info,
- "csum failed ino %llu off %llu csum %u expected csum %u",
+ btrfs_warn_rl(BTRFS_I(inode)->root->fs_info,
+ "csum failed ino %llu off %llu csum %u expected csum %u",
btrfs_ino(inode), start, csum, csum_expected);
memset(kaddr + pgoff, 1, len);
flush_dcache_page(page);
@@ -3110,8 +3142,6 @@ void btrfs_run_delayed_iputs(struct btrfs_root *root)
if (empty)
return;
- down_read(&fs_info->delayed_iput_sem);
-
spin_lock(&fs_info->delayed_iput_lock);
list_splice_init(&fs_info->delayed_iputs, &list);
spin_unlock(&fs_info->delayed_iput_lock);
@@ -3122,8 +3152,6 @@ void btrfs_run_delayed_iputs(struct btrfs_root *root)
iput(delayed->inode);
kfree(delayed);
}
-
- up_read(&root->fs_info->delayed_iput_sem);
}
/*
@@ -3654,6 +3682,35 @@ cache_index:
set_bit(BTRFS_INODE_NEEDS_FULL_SYNC,
&BTRFS_I(inode)->runtime_flags);
+ /*
+ * We don't persist the id of the transaction where an unlink operation
+ * against the inode was last made. So here we assume the inode might
+ * have been evicted, and therefore the exact value of last_unlink_trans
+ * lost, and set it to last_trans to avoid metadata inconsistencies
+ * between the inode and its parent if the inode is fsync'ed and the log
+ * replayed. For example, in the scenario:
+ *
+ * touch mydir/foo
+ * ln mydir/foo mydir/bar
+ * sync
+ * unlink mydir/bar
+ * echo 2 > /proc/sys/vm/drop_caches # evicts inode
+ * xfs_io -c fsync mydir/foo
+ * <power failure>
+ * mount fs, triggers fsync log replay
+ *
+ * We must make sure that when we fsync our inode foo we also log its
+ * parent inode, otherwise after log replay the parent still has the
+ * dentry with the "bar" name but our inode foo has a link count of 1
+ * and doesn't have an inode ref with the name "bar" anymore.
+ *
+ * Setting last_unlink_trans to last_trans is a pessimistic approach,
+ * but it guarantees correctness at the expense of ocassional full
+ * transaction commits on fsync if our inode is a directory, or if our
+ * inode is not a directory, logging its parent unnecessarily.
+ */
+ BTRFS_I(inode)->last_unlink_trans = BTRFS_I(inode)->last_trans;
+
path->slots[0]++;
if (inode->i_nlink != 1 ||
path->slots[0] >= btrfs_header_nritems(leaf))
@@ -3985,9 +4042,7 @@ int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
*/
static struct btrfs_trans_handle *__unlink_start_trans(struct inode *dir)
{
- struct btrfs_trans_handle *trans;
struct btrfs_root *root = BTRFS_I(dir)->root;
- int ret;
/*
* 1 for the possible orphan item
@@ -3996,27 +4051,7 @@ static struct btrfs_trans_handle *__unlink_start_trans(struct inode *dir)
* 1 for the inode ref
* 1 for the inode
*/
- trans = btrfs_start_transaction(root, 5);
- if (!IS_ERR(trans) || PTR_ERR(trans) != -ENOSPC)
- return trans;
-
- if (PTR_ERR(trans) == -ENOSPC) {
- u64 num_bytes = btrfs_calc_trans_metadata_size(root, 5);
-
- trans = btrfs_start_transaction(root, 0);
- if (IS_ERR(trans))
- return trans;
- ret = btrfs_cond_migrate_bytes(root->fs_info,
- &root->fs_info->trans_block_rsv,
- num_bytes, 5);
- if (ret) {
- btrfs_end_transaction(trans, root);
- return ERR_PTR(ret);
- }
- trans->block_rsv = &root->fs_info->trans_block_rsv;
- trans->bytes_reserved = num_bytes;
- }
- return trans;
+ return btrfs_start_transaction_fallback_global_rsv(root, 5, 5);
}
static int btrfs_unlink(struct inode *dir, struct dentry *dentry)
@@ -4184,6 +4219,47 @@ static int truncate_space_check(struct btrfs_trans_handle *trans,
}
+static int truncate_inline_extent(struct inode *inode,
+ struct btrfs_path *path,
+ struct btrfs_key *found_key,
+ const u64 item_end,
+ const u64 new_size)
+{
+ struct extent_buffer *leaf = path->nodes[0];
+ int slot = path->slots[0];
+ struct btrfs_file_extent_item *fi;
+ u32 size = (u32)(new_size - found_key->offset);
+ struct btrfs_root *root = BTRFS_I(inode)->root;
+
+ fi = btrfs_item_ptr(leaf, slot, struct btrfs_file_extent_item);
+
+ if (btrfs_file_extent_compression(leaf, fi) != BTRFS_COMPRESS_NONE) {
+ loff_t offset = new_size;
+ loff_t page_end = ALIGN(offset, PAGE_CACHE_SIZE);
+
+ /*
+ * Zero out the remaining of the last page of our inline extent,
+ * instead of directly truncating our inline extent here - that
+ * would be much more complex (decompressing all the data, then
+ * compressing the truncated data, which might be bigger than
+ * the size of the inline extent, resize the extent, etc).
+ * We release the path because to get the page we might need to
+ * read the extent item from disk (data not in the page cache).
+ */
+ btrfs_release_path(path);
+ return btrfs_truncate_page(inode, offset, page_end - offset, 0);
+ }
+
+ btrfs_set_file_extent_ram_bytes(leaf, fi, size);
+ size = btrfs_file_extent_calc_inline_size(size);
+ btrfs_truncate_item(root, path, size, 1);
+
+ if (test_bit(BTRFS_ROOT_REF_COWS, &root->state))
+ inode_sub_bytes(inode, item_end + 1 - new_size);
+
+ return 0;
+}
+
/*
* this can truncate away extent items, csum items and directory items.
* It starts at a high offset and removes keys until it can't find
@@ -4209,7 +4285,7 @@ int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
u64 extent_num_bytes = 0;
u64 extent_offset = 0;
u64 item_end = 0;
- u64 last_size = (u64)-1;
+ u64 last_size = new_size;
u32 found_type = (u8)-1;
int found_extent;
int del_item;
@@ -4378,27 +4454,40 @@ search_again:
* special encodings
*/
if (!del_item &&
- btrfs_file_extent_compression(leaf, fi) == 0 &&
btrfs_file_extent_encryption(leaf, fi) == 0 &&
btrfs_file_extent_other_encoding(leaf, fi) == 0) {
- u32 size = new_size - found_key.offset;
-
- if (test_bit(BTRFS_ROOT_REF_COWS, &root->state))
- inode_sub_bytes(inode, item_end + 1 -
- new_size);
/*
- * update the ram bytes to properly reflect
- * the new size of our item
+ * Need to release path in order to truncate a
+ * compressed extent. So delete any accumulated
+ * extent items so far.
*/
- btrfs_set_file_extent_ram_bytes(leaf, fi, size);
- size =
- btrfs_file_extent_calc_inline_size(size);
- btrfs_truncate_item(root, path, size, 1);
+ if (btrfs_file_extent_compression(leaf, fi) !=
+ BTRFS_COMPRESS_NONE && pending_del_nr) {
+ err = btrfs_del_items(trans, root, path,
+ pending_del_slot,
+ pending_del_nr);
+ if (err) {
+ btrfs_abort_transaction(trans,
+ root,
+ err);
+ goto error;
+ }
+ pending_del_nr = 0;
+ }
+
+ err = truncate_inline_extent(inode, path,
+ &found_key,
+ item_end,
+ new_size);
+ if (err) {
+ btrfs_abort_transaction(trans,
+ root, err);
+ goto error;
+ }
} else if (test_bit(BTRFS_ROOT_REF_COWS,
&root->state)) {
- inode_sub_bytes(inode, item_end + 1 -
- found_key.offset);
+ inode_sub_bytes(inode, item_end + 1 - new_size);
}
}
delete:
@@ -4428,7 +4517,7 @@ delete:
ret = btrfs_free_extent(trans, root, extent_start,
extent_num_bytes, 0,
btrfs_header_owner(leaf),
- ino, extent_offset, 0);
+ ino, extent_offset);
BUG_ON(ret);
if (btrfs_should_throttle_delayed_refs(trans, root))
btrfs_async_run_delayed_refs(root,
@@ -4493,8 +4582,7 @@ out:
btrfs_abort_transaction(trans, root, ret);
}
error:
- if (last_size != (u64)-1 &&
- root->root_key.objectid != BTRFS_TREE_LOG_OBJECTID)
+ if (root->root_key.objectid != BTRFS_TREE_LOG_OBJECTID)
btrfs_ordered_update_i_size(inode, last_size, NULL);
btrfs_free_path(path);
@@ -4543,14 +4631,17 @@ int btrfs_truncate_page(struct inode *inode, loff_t from, loff_t len,
if ((offset & (blocksize - 1)) == 0 &&
(!len || ((len & (blocksize - 1)) == 0)))
goto out;
- ret = btrfs_delalloc_reserve_space(inode, PAGE_CACHE_SIZE);
+ ret = btrfs_delalloc_reserve_space(inode,
+ round_down(from, PAGE_CACHE_SIZE), PAGE_CACHE_SIZE);
if (ret)
goto out;
again:
page = find_or_create_page(mapping, index, mask);
if (!page) {
- btrfs_delalloc_release_space(inode, PAGE_CACHE_SIZE);
+ btrfs_delalloc_release_space(inode,
+ round_down(from, PAGE_CACHE_SIZE),
+ PAGE_CACHE_SIZE);
ret = -ENOMEM;
goto out;
}
@@ -4618,7 +4709,8 @@ again:
out_unlock:
if (ret)
- btrfs_delalloc_release_space(inode, PAGE_CACHE_SIZE);
+ btrfs_delalloc_release_space(inode, page_start,
+ PAGE_CACHE_SIZE);
unlock_page(page);
page_cache_release(page);
out:
@@ -4986,24 +5078,53 @@ static void evict_inode_truncate_pages(struct inode *inode)
}
write_unlock(&map_tree->lock);
+ /*
+ * Keep looping until we have no more ranges in the io tree.
+ * We can have ongoing bios started by readpages (called from readahead)
+ * that have their endio callback (extent_io.c:end_bio_extent_readpage)
+ * still in progress (unlocked the pages in the bio but did not yet
+ * unlocked the ranges in the io tree). Therefore this means some
+ * ranges can still be locked and eviction started because before
+ * submitting those bios, which are executed by a separate task (work
+ * queue kthread), inode references (inode->i_count) were not taken
+ * (which would be dropped in the end io callback of each bio).
+ * Therefore here we effectively end up waiting for those bios and
+ * anyone else holding locked ranges without having bumped the inode's
+ * reference count - if we don't do it, when they access the inode's
+ * io_tree to unlock a range it may be too late, leading to an
+ * use-after-free issue.
+ */
spin_lock(&io_tree->lock);
while (!RB_EMPTY_ROOT(&io_tree->state)) {
struct extent_state *state;
struct extent_state *cached_state = NULL;
+ u64 start;
+ u64 end;
node = rb_first(&io_tree->state);
state = rb_entry(node, struct extent_state, rb_node);
- atomic_inc(&state->refs);
+ start = state->start;
+ end = state->end;
spin_unlock(&io_tree->lock);
- lock_extent_bits(io_tree, state->start, state->end,
- 0, &cached_state);
- clear_extent_bit(io_tree, state->start, state->end,
+ lock_extent_bits(io_tree, start, end, 0, &cached_state);
+
+ /*
+ * If still has DELALLOC flag, the extent didn't reach disk,
+ * and its reserved space won't be freed by delayed_ref.
+ * So we need to free its reserved space here.
+ * (Refer to comment in btrfs_invalidatepage, case 2)
+ *
+ * Note, end is the bytenr of last byte, so we need + 1 here.
+ */
+ if (state->state & EXTENT_DELALLOC)
+ btrfs_qgroup_free_data(inode, start, end - start + 1);
+
+ clear_extent_bit(io_tree, start, end,
EXTENT_LOCKED | EXTENT_DIRTY |
EXTENT_DELALLOC | EXTENT_DO_ACCOUNTING |
EXTENT_DEFRAG, 1, 1,
&cached_state, GFP_NOFS);
- free_extent_state(state);
cond_resched();
spin_lock(&io_tree->lock);
@@ -5035,7 +5156,8 @@ void btrfs_evict_inode(struct inode *inode)
goto no_delete;
}
/* do we really want it for ->i_nlink > 0 and zero btrfs_root_refs? */
- btrfs_wait_ordered_range(inode, 0, (u64)-1);
+ if (!special_file(inode->i_mode))
+ btrfs_wait_ordered_range(inode, 0, (u64)-1);
btrfs_free_io_failure_record(inode, 0, (u64)-1);
@@ -5615,6 +5737,7 @@ static int btrfs_real_readdir(struct file *file, struct dir_context *ctx)
char *name_ptr;
int name_len;
int is_curr = 0; /* ctx->pos points to the current index? */
+ bool emitted;
/* FIXME, use a real flag for deciding about the key type */
if (root->fs_info->tree_root == root)
@@ -5643,6 +5766,7 @@ static int btrfs_real_readdir(struct file *file, struct dir_context *ctx)
if (ret < 0)
goto err;
+ emitted = false;
while (1) {
leaf = path->nodes[0];
slot = path->slots[0];
@@ -5722,6 +5846,7 @@ skip:
if (over)
goto nopos;
+ emitted = true;
di_len = btrfs_dir_name_len(leaf, di) +
btrfs_dir_data_len(leaf, di) + sizeof(*di);
di_cur += di_len;
@@ -5734,11 +5859,20 @@ next:
if (key_type == BTRFS_DIR_INDEX_KEY) {
if (is_curr)
ctx->pos++;
- ret = btrfs_readdir_delayed_dir_index(ctx, &ins_list);
+ ret = btrfs_readdir_delayed_dir_index(ctx, &ins_list, &emitted);
if (ret)
goto nopos;
}
+ /*
+ * If we haven't emitted any dir entry, we must not touch ctx->pos as
+ * it was was set to the termination value in previous call. We assume
+ * that "." and ".." were emitted if we reach this point and set the
+ * termination value as well for an empty directory.
+ */
+ if (ctx->pos > 2 && !emitted)
+ goto nopos;
+
/* Reached end of directory/root. Bump pos past the last item. */
ctx->pos++;
@@ -6218,9 +6352,6 @@ static int btrfs_mknod(struct inode *dir, struct dentry *dentry,
u64 objectid;
u64 index = 0;
- if (!new_valid_dev(rdev))
- return -EINVAL;
-
/*
* 2 for inode item and ref
* 2 for dir items
@@ -6358,7 +6489,7 @@ out_unlock_inode:
static int btrfs_link(struct dentry *old_dentry, struct inode *dir,
struct dentry *dentry)
{
- struct btrfs_trans_handle *trans;
+ struct btrfs_trans_handle *trans = NULL;
struct btrfs_root *root = BTRFS_I(dir)->root;
struct inode *inode = d_inode(old_dentry);
u64 index;
@@ -6384,6 +6515,7 @@ static int btrfs_link(struct dentry *old_dentry, struct inode *dir,
trans = btrfs_start_transaction(root, 5);
if (IS_ERR(trans)) {
err = PTR_ERR(trans);
+ trans = NULL;
goto fail;
}
@@ -6417,9 +6549,10 @@ static int btrfs_link(struct dentry *old_dentry, struct inode *dir,
btrfs_log_new_name(trans, inode, NULL, parent);
}
- btrfs_end_transaction(trans, root);
btrfs_balance_delayed_items(root);
fail:
+ if (trans)
+ btrfs_end_transaction(trans, root);
if (drop_inode) {
inode_dec_link_count(inode);
iput(inode);
@@ -6860,8 +6993,7 @@ out:
trace_btrfs_get_extent(root, em);
- if (path)
- btrfs_free_path(path);
+ btrfs_free_path(path);
if (trans) {
ret = btrfs_end_transaction(trans, root);
if (!err)
@@ -7360,6 +7492,32 @@ static struct extent_map *create_pinned_em(struct inode *inode, u64 start,
return em;
}
+struct btrfs_dio_data {
+ u64 outstanding_extents;
+ u64 reserve;
+};
+
+static void adjust_dio_outstanding_extents(struct inode *inode,
+ struct btrfs_dio_data *dio_data,
+ const u64 len)
+{
+ unsigned num_extents;
+
+ num_extents = (unsigned) div64_u64(len + BTRFS_MAX_EXTENT_SIZE - 1,
+ BTRFS_MAX_EXTENT_SIZE);
+ /*
+ * If we have an outstanding_extents count still set then we're
+ * within our reservation, otherwise we need to adjust our inode
+ * counter appropriately.
+ */
+ if (dio_data->outstanding_extents) {
+ dio_data->outstanding_extents -= num_extents;
+ } else {
+ spin_lock(&BTRFS_I(inode)->lock);
+ BTRFS_I(inode)->outstanding_extents += num_extents;
+ spin_unlock(&BTRFS_I(inode)->lock);
+ }
+}
static int btrfs_get_blocks_direct(struct inode *inode, sector_t iblock,
struct buffer_head *bh_result, int create)
@@ -7367,10 +7525,10 @@ static int btrfs_get_blocks_direct(struct inode *inode, sector_t iblock,
struct extent_map *em;
struct btrfs_root *root = BTRFS_I(inode)->root;
struct extent_state *cached_state = NULL;
+ struct btrfs_dio_data *dio_data = NULL;
u64 start = iblock << inode->i_blkbits;
u64 lockstart, lockend;
u64 len = bh_result->b_size;
- u64 *outstanding_extents = NULL;
int unlock_bits = EXTENT_LOCKED;
int ret = 0;
@@ -7388,7 +7546,7 @@ static int btrfs_get_blocks_direct(struct inode *inode, sector_t iblock,
* that anything that needs to check if there's a transction doesn't get
* confused.
*/
- outstanding_extents = current->journal_info;
+ dio_data = current->journal_info;
current->journal_info = NULL;
}
@@ -7396,8 +7554,11 @@ static int btrfs_get_blocks_direct(struct inode *inode, sector_t iblock,
* If this errors out it's because we couldn't invalidate pagecache for
* this range and we need to fallback to buffered.
*/
- if (lock_extent_direct(inode, lockstart, lockend, &cached_state, create))
- return -ENOTBLK;
+ if (lock_extent_direct(inode, lockstart, lockend, &cached_state,
+ create)) {
+ ret = -ENOTBLK;
+ goto err;
+ }
em = btrfs_get_extent(inode, NULL, 0, start, len, 0);
if (IS_ERR(em)) {
@@ -7515,21 +7676,11 @@ unlock:
if (start + len > i_size_read(inode))
i_size_write(inode, start + len);
- /*
- * If we have an outstanding_extents count still set then we're
- * within our reservation, otherwise we need to adjust our inode
- * counter appropriately.
- */
- if (*outstanding_extents) {
- (*outstanding_extents)--;
- } else {
- spin_lock(&BTRFS_I(inode)->lock);
- BTRFS_I(inode)->outstanding_extents++;
- spin_unlock(&BTRFS_I(inode)->lock);
- }
-
- current->journal_info = outstanding_extents;
- btrfs_free_reserved_data_space(inode, len);
+ adjust_dio_outstanding_extents(inode, dio_data, len);
+ btrfs_free_reserved_data_space(inode, start, len);
+ WARN_ON(dio_data->reserve < len);
+ dio_data->reserve -= len;
+ current->journal_info = dio_data;
}
/*
@@ -7552,8 +7703,17 @@ unlock:
unlock_err:
clear_extent_bit(&BTRFS_I(inode)->io_tree, lockstart, lockend,
unlock_bits, 1, 0, &cached_state, GFP_NOFS);
- if (outstanding_extents)
- current->journal_info = outstanding_extents;
+err:
+ if (dio_data)
+ current->journal_info = dio_data;
+ /*
+ * Compensate the delalloc release we do in btrfs_direct_IO() when we
+ * write less data then expected, so that we don't underflow our inode's
+ * outstanding extents counter.
+ */
+ if (create && dio_data)
+ adjust_dio_outstanding_extents(inode, dio_data, len);
+
return ret;
}
@@ -7671,13 +7831,13 @@ struct btrfs_retry_complete {
int uptodate;
};
-static void btrfs_retry_endio_nocsum(struct bio *bio, int err)
+static void btrfs_retry_endio_nocsum(struct bio *bio)
{
struct btrfs_retry_complete *done = bio->bi_private;
struct bio_vec *bvec;
int i;
- if (err)
+ if (bio->bi_error)
goto end;
done->uptodate = 1;
@@ -7726,7 +7886,7 @@ try_again:
return 0;
}
-static void btrfs_retry_endio(struct bio *bio, int err)
+static void btrfs_retry_endio(struct bio *bio)
{
struct btrfs_retry_complete *done = bio->bi_private;
struct btrfs_io_bio *io_bio = btrfs_io_bio(bio);
@@ -7735,7 +7895,7 @@ static void btrfs_retry_endio(struct bio *bio, int err)
int ret;
int i;
- if (err)
+ if (bio->bi_error)
goto end;
uptodate = 1;
@@ -7818,12 +7978,13 @@ static int btrfs_subio_endio_read(struct inode *inode,
}
}
-static void btrfs_endio_direct_read(struct bio *bio, int err)
+static void btrfs_endio_direct_read(struct bio *bio)
{
struct btrfs_dio_private *dip = bio->bi_private;
struct inode *inode = dip->inode;
struct bio *dio_bio;
struct btrfs_io_bio *io_bio = btrfs_io_bio(bio);
+ int err = bio->bi_error;
if (dip->flags & BTRFS_DIO_ORIG_BIO_SUBMITTED)
err = btrfs_subio_endio_read(inode, io_bio, err);
@@ -7834,17 +7995,15 @@ static void btrfs_endio_direct_read(struct bio *bio, int err)
kfree(dip);
- /* If we had a csum failure make sure to clear the uptodate flag */
- if (err)
- clear_bit(BIO_UPTODATE, &dio_bio->bi_flags);
- dio_end_io(dio_bio, err);
+ dio_bio->bi_error = bio->bi_error;
+ dio_end_io(dio_bio, bio->bi_error);
if (io_bio->end_io)
io_bio->end_io(io_bio, err);
bio_put(bio);
}
-static void btrfs_endio_direct_write(struct bio *bio, int err)
+static void btrfs_endio_direct_write(struct bio *bio)
{
struct btrfs_dio_private *dip = bio->bi_private;
struct inode *inode = dip->inode;
@@ -7855,12 +8014,11 @@ static void btrfs_endio_direct_write(struct bio *bio, int err)
struct bio *dio_bio;
int ret;
- if (err)
- goto out_done;
again:
ret = btrfs_dec_test_first_ordered_pending(inode, &ordered,
&ordered_offset,
- ordered_bytes, !err);
+ ordered_bytes,
+ !bio->bi_error);
if (!ret)
goto out_test;
@@ -7879,15 +8037,12 @@ out_test:
ordered = NULL;
goto again;
}
-out_done:
dio_bio = dip->dio_bio;
kfree(dip);
- /* If we had an error make sure to clear the uptodate flag */
- if (err)
- clear_bit(BIO_UPTODATE, &dio_bio->bi_flags);
- dio_end_io(dio_bio, err);
+ dio_bio->bi_error = bio->bi_error;
+ dio_end_io(dio_bio, bio->bi_error);
bio_put(bio);
}
@@ -7902,9 +8057,10 @@ static int __btrfs_submit_bio_start_direct_io(struct inode *inode, int rw,
return 0;
}
-static void btrfs_end_dio_bio(struct bio *bio, int err)
+static void btrfs_end_dio_bio(struct bio *bio)
{
struct btrfs_dio_private *dip = bio->bi_private;
+ int err = bio->bi_error;
if (err)
btrfs_warn(BTRFS_I(dip->inode)->root->fs_info,
@@ -7933,8 +8089,8 @@ static void btrfs_end_dio_bio(struct bio *bio, int err)
if (dip->errors) {
bio_io_error(dip->orig_bio);
} else {
- set_bit(BIO_UPTODATE, &dip->dio_bio->bi_flags);
- bio_endio(dip->orig_bio, 0);
+ dip->dio_bio->bi_error = 0;
+ bio_endio(dip->orig_bio);
}
out:
bio_put(bio);
@@ -7943,8 +8099,11 @@ out:
static struct bio *btrfs_dio_bio_alloc(struct block_device *bdev,
u64 first_sector, gfp_t gfp_flags)
{
- int nr_vecs = bio_get_nr_vecs(bdev);
- return btrfs_bio_alloc(bdev, first_sector, nr_vecs, gfp_flags);
+ struct bio *bio;
+ bio = btrfs_bio_alloc(bdev, first_sector, BIO_MAX_PAGES, gfp_flags);
+ if (bio)
+ bio_associate_current(bio);
+ return bio;
}
static inline int btrfs_lookup_and_bind_dio_csum(struct btrfs_root *root,
@@ -8147,9 +8306,8 @@ out_err:
static void btrfs_submit_direct(int rw, struct bio *dio_bio,
struct inode *inode, loff_t file_offset)
{
- struct btrfs_root *root = BTRFS_I(inode)->root;
- struct btrfs_dio_private *dip;
- struct bio *io_bio;
+ struct btrfs_dio_private *dip = NULL;
+ struct bio *io_bio = NULL;
struct btrfs_io_bio *btrfs_bio;
int skip_sum;
int write = rw & REQ_WRITE;
@@ -8166,7 +8324,7 @@ static void btrfs_submit_direct(int rw, struct bio *dio_bio,
dip = kzalloc(sizeof(*dip), GFP_NOFS);
if (!dip) {
ret = -ENOMEM;
- goto free_io_bio;
+ goto free_ordered;
}
dip->private = dio_bio->bi_private;
@@ -8194,25 +8352,56 @@ static void btrfs_submit_direct(int rw, struct bio *dio_bio,
if (btrfs_bio->end_io)
btrfs_bio->end_io(btrfs_bio, ret);
-free_io_bio:
- bio_put(io_bio);
free_ordered:
/*
- * If this is a write, we need to clean up the reserved space and kill
- * the ordered extent.
+ * If we arrived here it means either we failed to submit the dip
+ * or we either failed to clone the dio_bio or failed to allocate the
+ * dip. If we cloned the dio_bio and allocated the dip, we can just
+ * call bio_endio against our io_bio so that we get proper resource
+ * cleanup if we fail to submit the dip, otherwise, we must do the
+ * same as btrfs_endio_direct_[write|read] because we can't call these
+ * callbacks - they require an allocated dip and a clone of dio_bio.
*/
- if (write) {
- struct btrfs_ordered_extent *ordered;
- ordered = btrfs_lookup_ordered_extent(inode, file_offset);
- if (!test_bit(BTRFS_ORDERED_PREALLOC, &ordered->flags) &&
- !test_bit(BTRFS_ORDERED_NOCOW, &ordered->flags))
- btrfs_free_reserved_extent(root, ordered->start,
- ordered->disk_len, 1);
- btrfs_put_ordered_extent(ordered);
- btrfs_put_ordered_extent(ordered);
+ if (io_bio && dip) {
+ io_bio->bi_error = -EIO;
+ bio_endio(io_bio);
+ /*
+ * The end io callbacks free our dip, do the final put on io_bio
+ * and all the cleanup and final put for dio_bio (through
+ * dio_end_io()).
+ */
+ dip = NULL;
+ io_bio = NULL;
+ } else {
+ if (write) {
+ struct btrfs_ordered_extent *ordered;
+
+ ordered = btrfs_lookup_ordered_extent(inode,
+ file_offset);
+ set_bit(BTRFS_ORDERED_IOERR, &ordered->flags);
+ /*
+ * Decrements our ref on the ordered extent and removes
+ * the ordered extent from the inode's ordered tree,
+ * doing all the proper resource cleanup such as for the
+ * reserved space and waking up any waiters for this
+ * ordered extent (through btrfs_remove_ordered_extent).
+ */
+ btrfs_finish_ordered_io(ordered);
+ } else {
+ unlock_extent(&BTRFS_I(inode)->io_tree, file_offset,
+ file_offset + dio_bio->bi_iter.bi_size - 1);
+ }
+ dio_bio->bi_error = -EIO;
+ /*
+ * Releases and cleans up our dio_bio, no need to bio_put()
+ * nor bio_endio()/bio_io_error() against dio_bio.
+ */
+ dio_end_io(dio_bio, ret);
}
- bio_endio(dio_bio, ret);
+ if (io_bio)
+ bio_put(io_bio);
+ kfree(dip);
}
static ssize_t check_direct_IO(struct btrfs_root *root, struct kiocb *iocb,
@@ -8253,7 +8442,8 @@ static ssize_t btrfs_direct_IO(struct kiocb *iocb, struct iov_iter *iter,
{
struct file *file = iocb->ki_filp;
struct inode *inode = file->f_mapping->host;
- u64 outstanding_extents = 0;
+ struct btrfs_root *root = BTRFS_I(inode)->root;
+ struct btrfs_dio_data dio_data = { 0 };
size_t count = 0;
int flags = 0;
bool wakeup = true;
@@ -8288,10 +8478,10 @@ static ssize_t btrfs_direct_IO(struct kiocb *iocb, struct iov_iter *iter,
mutex_unlock(&inode->i_mutex);
relock = true;
}
- ret = btrfs_delalloc_reserve_space(inode, count);
+ ret = btrfs_delalloc_reserve_space(inode, offset, count);
if (ret)
goto out;
- outstanding_extents = div64_u64(count +
+ dio_data.outstanding_extents = div64_u64(count +
BTRFS_MAX_EXTENT_SIZE - 1,
BTRFS_MAX_EXTENT_SIZE);
@@ -8300,7 +8490,8 @@ static ssize_t btrfs_direct_IO(struct kiocb *iocb, struct iov_iter *iter,
* do the accounting properly if we go over the number we
* originally calculated. Abuse current->journal_info for this.
*/
- current->journal_info = &outstanding_extents;
+ dio_data.reserve = round_up(count, root->sectorsize);
+ current->journal_info = &dio_data;
} else if (test_bit(BTRFS_INODE_READDIO_NEED_LOCK,
&BTRFS_I(inode)->runtime_flags)) {
inode_dio_end(inode);
@@ -8314,10 +8505,12 @@ static ssize_t btrfs_direct_IO(struct kiocb *iocb, struct iov_iter *iter,
btrfs_submit_direct, flags);
if (iov_iter_rw(iter) == WRITE) {
current->journal_info = NULL;
- if (ret < 0 && ret != -EIOCBQUEUED)
- btrfs_delalloc_release_space(inode, count);
- else if (ret >= 0 && (size_t)ret < count)
- btrfs_delalloc_release_space(inode,
+ if (ret < 0 && ret != -EIOCBQUEUED) {
+ if (dio_data.reserve)
+ btrfs_delalloc_release_space(inode, offset,
+ dio_data.reserve);
+ } else if (ret >= 0 && (size_t)ret < count)
+ btrfs_delalloc_release_space(inode, offset,
count - (size_t)ret);
}
out:
@@ -8353,15 +8546,28 @@ int btrfs_readpage(struct file *file, struct page *page)
static int btrfs_writepage(struct page *page, struct writeback_control *wbc)
{
struct extent_io_tree *tree;
-
+ struct inode *inode = page->mapping->host;
+ int ret;
if (current->flags & PF_MEMALLOC) {
redirty_page_for_writepage(wbc, page);
unlock_page(page);
return 0;
}
+
+ /*
+ * If we are under memory pressure we will call this directly from the
+ * VM, we need to make sure we have the inode referenced for the ordered
+ * extent. If not just return like we didn't do anything.
+ */
+ if (!igrab(inode)) {
+ redirty_page_for_writepage(wbc, page);
+ return AOP_WRITEPAGE_ACTIVATE;
+ }
tree = &BTRFS_I(page->mapping->host)->io_tree;
- return extent_write_full_page(tree, page, btrfs_get_extent, wbc);
+ ret = extent_write_full_page(tree, page, btrfs_get_extent, wbc);
+ btrfs_add_delayed_iput(inode);
+ return ret;
}
static int btrfs_writepages(struct address_space *mapping,
@@ -8476,6 +8682,18 @@ static void btrfs_invalidatepage(struct page *page, unsigned int offset,
}
}
+ /*
+ * Qgroup reserved space handler
+ * Page here will be either
+ * 1) Already written to disk
+ * In this case, its reserved space is released from data rsv map
+ * and will be freed by delayed_ref handler finally.
+ * So even we call qgroup_free_data(), it won't decrease reserved
+ * space.
+ * 2) Not written to disk
+ * This means the reserved space should be freed here.
+ */
+ btrfs_qgroup_free_data(inode, page_start, PAGE_CACHE_SIZE);
if (!inode_evicting) {
clear_extent_bit(tree, page_start, page_end,
EXTENT_LOCKED | EXTENT_DIRTY |
@@ -8526,7 +8744,11 @@ int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf)
u64 page_end;
sb_start_pagefault(inode->i_sb);
- ret = btrfs_delalloc_reserve_space(inode, PAGE_CACHE_SIZE);
+ page_start = page_offset(page);
+ page_end = page_start + PAGE_CACHE_SIZE - 1;
+
+ ret = btrfs_delalloc_reserve_space(inode, page_start,
+ PAGE_CACHE_SIZE);
if (!ret) {
ret = file_update_time(vma->vm_file);
reserved = 1;
@@ -8545,8 +8767,6 @@ int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf)
again:
lock_page(page);
size = i_size_read(inode);
- page_start = page_offset(page);
- page_end = page_start + PAGE_CACHE_SIZE - 1;
if ((page->mapping != inode->i_mapping) ||
(page_start >= size)) {
@@ -8623,7 +8843,7 @@ out_unlock:
}
unlock_page(page);
out:
- btrfs_delalloc_release_space(inode, PAGE_CACHE_SIZE);
+ btrfs_delalloc_release_space(inode, page_start, PAGE_CACHE_SIZE);
out_noreserve:
sb_end_pagefault(inode->i_sb);
return ret;
@@ -8912,6 +9132,7 @@ void btrfs_destroy_inode(struct inode *inode)
btrfs_put_ordered_extent(ordered);
}
}
+ btrfs_qgroup_check_reserved_leak(inode);
inode_tree_del(inode);
btrfs_drop_extent_cache(inode, 0, (u64)-1, 0);
free:
@@ -9440,9 +9661,11 @@ static int btrfs_symlink(struct inode *dir, struct dentry *dentry,
/*
* 2 items for inode item and ref
* 2 items for dir items
+ * 1 item for updating parent inode item
+ * 1 item for the inline extent item
* 1 item for xattr if selinux is on
*/
- trans = btrfs_start_transaction(root, 5);
+ trans = btrfs_start_transaction(root, 7);
if (IS_ERR(trans))
return PTR_ERR(trans);
@@ -9548,6 +9771,7 @@ static int __btrfs_prealloc_file_range(struct inode *inode, int mode,
u64 cur_offset = start;
u64 i_size;
u64 cur_bytes;
+ u64 last_alloc = (u64)-1;
int ret = 0;
bool own_trans = true;
@@ -9564,6 +9788,13 @@ static int __btrfs_prealloc_file_range(struct inode *inode, int mode,
cur_bytes = min(num_bytes, 256ULL * 1024 * 1024);
cur_bytes = max(cur_bytes, min_size);
+ /*
+ * If we are severely fragmented we could end up with really
+ * small allocations, so if the allocator is returning small
+ * chunks lets make its job easier by only searching for those
+ * sized chunks.
+ */
+ cur_bytes = min(cur_bytes, last_alloc);
ret = btrfs_reserve_extent(root, cur_bytes, min_size, 0,
*alloc_hint, &ins, 1, 0);
if (ret) {
@@ -9572,6 +9803,7 @@ static int __btrfs_prealloc_file_range(struct inode *inode, int mode,
break;
}
+ last_alloc = ins.offset;
ret = insert_reserved_file_extent(trans, inode,
cur_offset, ins.objectid,
ins.offset, ins.offset,
diff --git a/kernel/fs/btrfs/ioctl.c b/kernel/fs/btrfs/ioctl.c
index 37d456a9a..f07d01bc4 100644
--- a/kernel/fs/btrfs/ioctl.c
+++ b/kernel/fs/btrfs/ioctl.c
@@ -87,7 +87,8 @@ struct btrfs_ioctl_received_subvol_args_32 {
static int btrfs_clone(struct inode *src, struct inode *inode,
- u64 off, u64 olen, u64 olen_aligned, u64 destoff);
+ u64 off, u64 olen, u64 olen_aligned, u64 destoff,
+ int no_time_update);
/* Mask out flags that are inappropriate for the given type of inode. */
static inline __u32 btrfs_mask_flags(umode_t mode, __u32 flags)
@@ -553,8 +554,8 @@ static noinline int create_subvol(struct inode *dir,
key.offset = (u64)-1;
new_root = btrfs_read_fs_root_no_name(root->fs_info, &key);
if (IS_ERR(new_root)) {
- btrfs_abort_transaction(trans, root, PTR_ERR(new_root));
ret = PTR_ERR(new_root);
+ btrfs_abort_transaction(trans, root, ret);
goto fail;
}
@@ -567,6 +568,10 @@ static noinline int create_subvol(struct inode *dir,
goto fail;
}
+ mutex_lock(&new_root->objectid_mutex);
+ new_root->highest_objectid = new_dirid;
+ mutex_unlock(&new_root->objectid_mutex);
+
/*
* insert the directory item
*/
@@ -1029,6 +1034,7 @@ static int should_defrag_range(struct inode *inode, u64 start, u32 thresh,
struct extent_map *em;
int ret = 1;
bool next_mergeable = true;
+ bool prev_mergeable = true;
/*
* make sure that once we start defragging an extent, we keep on
@@ -1049,13 +1055,16 @@ static int should_defrag_range(struct inode *inode, u64 start, u32 thresh,
goto out;
}
+ if (!*defrag_end)
+ prev_mergeable = false;
+
next_mergeable = defrag_check_next_extent(inode, em);
/*
* we hit a real extent, if it is big or the next extent is not a
* real extent, don't bother defragging it
*/
if (!compress && (*last_len == 0 || *last_len >= thresh) &&
- (em->len >= thresh || !next_mergeable))
+ (em->len >= thresh || (!next_mergeable && !prev_mergeable)))
ret = 0;
out:
/*
@@ -1115,7 +1124,8 @@ static int cluster_pages_for_defrag(struct inode *inode,
page_cnt = min_t(u64, (u64)num_pages, (u64)file_end - start_index + 1);
ret = btrfs_delalloc_reserve_space(inode,
- page_cnt << PAGE_CACHE_SHIFT);
+ start_index << PAGE_CACHE_SHIFT,
+ page_cnt << PAGE_CACHE_SHIFT);
if (ret)
return ret;
i_done = 0;
@@ -1205,7 +1215,8 @@ again:
BTRFS_I(inode)->outstanding_extents++;
spin_unlock(&BTRFS_I(inode)->lock);
btrfs_delalloc_release_space(inode,
- (page_cnt - i_done) << PAGE_CACHE_SHIFT);
+ start_index << PAGE_CACHE_SHIFT,
+ (page_cnt - i_done) << PAGE_CACHE_SHIFT);
}
@@ -1230,7 +1241,9 @@ out:
unlock_page(pages[i]);
page_cache_release(pages[i]);
}
- btrfs_delalloc_release_space(inode, page_cnt << PAGE_CACHE_SHIFT);
+ btrfs_delalloc_release_space(inode,
+ start_index << PAGE_CACHE_SHIFT,
+ page_cnt << PAGE_CACHE_SHIFT);
return ret;
}
@@ -1318,7 +1331,7 @@ int btrfs_defrag_file(struct inode *inode, struct file *file,
i = range->start >> PAGE_CACHE_SHIFT;
}
if (!max_to_defrag)
- max_to_defrag = last_index + 1;
+ max_to_defrag = last_index - i + 1;
/*
* make writeback starts from i, so the defrag range can be
@@ -1337,7 +1350,7 @@ int btrfs_defrag_file(struct inode *inode, struct file *file,
break;
if (btrfs_defrag_cancelled(root->fs_info)) {
- printk(KERN_DEBUG "BTRFS: defrag_file cancelled\n");
+ btrfs_debug(root->fs_info, "defrag_file cancelled");
ret = -EAGAIN;
break;
}
@@ -1368,7 +1381,7 @@ int btrfs_defrag_file(struct inode *inode, struct file *file,
ra_index = max(i, ra_index);
btrfs_force_ra(inode->i_mapping, ra, file, ra_index,
cluster);
- ra_index += max_cluster;
+ ra_index += cluster;
}
mutex_lock(&inode->i_mutex);
@@ -1574,7 +1587,7 @@ static noinline int btrfs_ioctl_resize(struct file *file,
new_size = div_u64(new_size, root->sectorsize);
new_size *= root->sectorsize;
- printk_in_rcu(KERN_INFO "BTRFS: new size for %s is %llu\n",
+ btrfs_info_in_rcu(root->fs_info, "new size for %s is %llu",
rcu_str_deref(device->name), new_size);
if (new_size > old_size) {
@@ -1932,6 +1945,7 @@ static noinline int copy_to_sk(struct btrfs_root *root,
u64 found_transid;
struct extent_buffer *leaf;
struct btrfs_ioctl_search_header sh;
+ struct btrfs_key test;
unsigned long item_off;
unsigned long item_len;
int nritems;
@@ -2015,12 +2029,17 @@ static noinline int copy_to_sk(struct btrfs_root *root,
}
advance_key:
ret = 0;
- if (key->offset < (u64)-1 && key->offset < sk->max_offset)
+ test.objectid = sk->max_objectid;
+ test.type = sk->max_type;
+ test.offset = sk->max_offset;
+ if (btrfs_comp_cpu_keys(key, &test) >= 0)
+ ret = 1;
+ else if (key->offset < (u64)-1)
key->offset++;
- else if (key->type < (u8)-1 && key->type < sk->max_type) {
+ else if (key->type < (u8)-1) {
key->offset = 0;
key->type++;
- } else if (key->objectid < (u64)-1 && key->objectid < sk->max_objectid) {
+ } else if (key->objectid < (u64)-1) {
key->offset = 0;
key->type = 0;
key->objectid++;
@@ -2070,7 +2089,7 @@ static noinline int search_ioctl(struct inode *inode,
key.offset = (u64)-1;
root = btrfs_read_fs_root_no_name(info, &key);
if (IS_ERR(root)) {
- printk(KERN_ERR "BTRFS: could not find root %llu\n",
+ btrfs_err(info, "could not find root %llu",
sk->tree_id);
btrfs_free_path(path);
return -ENOENT;
@@ -2210,7 +2229,7 @@ static noinline int btrfs_search_path_in_tree(struct btrfs_fs_info *info,
key.offset = (u64)-1;
root = btrfs_read_fs_root_no_name(info, &key);
if (IS_ERR(root)) {
- printk(KERN_ERR "BTRFS: could not find root %llu\n", tree_id);
+ btrfs_err(info, "could not find root %llu", tree_id);
ret = -ENOENT;
goto out;
}
@@ -2271,10 +2290,7 @@ static noinline int btrfs_ioctl_ino_lookup(struct file *file,
{
struct btrfs_ioctl_ino_lookup_args *args;
struct inode *inode;
- int ret;
-
- if (!capable(CAP_SYS_ADMIN))
- return -EPERM;
+ int ret = 0;
args = memdup_user(argp, sizeof(*args));
if (IS_ERR(args))
@@ -2282,13 +2298,28 @@ static noinline int btrfs_ioctl_ino_lookup(struct file *file,
inode = file_inode(file);
+ /*
+ * Unprivileged query to obtain the containing subvolume root id. The
+ * path is reset so it's consistent with btrfs_search_path_in_tree.
+ */
if (args->treeid == 0)
args->treeid = BTRFS_I(inode)->root->root_key.objectid;
+ if (args->objectid == BTRFS_FIRST_FREE_OBJECTID) {
+ args->name[0] = 0;
+ goto out;
+ }
+
+ if (!capable(CAP_SYS_ADMIN)) {
+ ret = -EPERM;
+ goto out;
+ }
+
ret = btrfs_search_path_in_tree(BTRFS_I(inode)->root->fs_info,
args->treeid, args->objectid,
args->name);
+out:
if (ret == 0 && copy_to_user(argp, args, sizeof(*args)))
ret = -EFAULT;
@@ -2676,7 +2707,6 @@ static long btrfs_ioctl_fs_info(struct btrfs_root *root, void __user *arg)
{
struct btrfs_ioctl_fs_info_args *fi_args;
struct btrfs_device *device;
- struct btrfs_device *next;
struct btrfs_fs_devices *fs_devices = root->fs_info->fs_devices;
int ret = 0;
@@ -2688,7 +2718,7 @@ static long btrfs_ioctl_fs_info(struct btrfs_root *root, void __user *arg)
fi_args->num_devices = fs_devices->num_devices;
memcpy(&fi_args->fsid, root->fs_info->fsid, sizeof(fi_args->fsid));
- list_for_each_entry_safe(device, next, &fs_devices->devices, dev_list) {
+ list_for_each_entry(device, &fs_devices->devices, dev_list) {
if (device->devid > fi_args->max_id)
fi_args->max_id = device->devid;
}
@@ -2753,38 +2783,68 @@ out:
return ret;
}
-static struct page *extent_same_get_page(struct inode *inode, u64 off)
+static struct page *extent_same_get_page(struct inode *inode, pgoff_t index)
{
struct page *page;
- pgoff_t index;
- struct extent_io_tree *tree = &BTRFS_I(inode)->io_tree;
-
- index = off >> PAGE_CACHE_SHIFT;
page = grab_cache_page(inode->i_mapping, index);
if (!page)
- return NULL;
+ return ERR_PTR(-ENOMEM);
if (!PageUptodate(page)) {
- if (extent_read_full_page_nolock(tree, page, btrfs_get_extent,
- 0))
- return NULL;
+ int ret;
+
+ ret = btrfs_readpage(NULL, page);
+ if (ret)
+ return ERR_PTR(ret);
lock_page(page);
if (!PageUptodate(page)) {
unlock_page(page);
page_cache_release(page);
- return NULL;
+ return ERR_PTR(-EIO);
+ }
+ if (page->mapping != inode->i_mapping) {
+ unlock_page(page);
+ page_cache_release(page);
+ return ERR_PTR(-EAGAIN);
}
}
- unlock_page(page);
return page;
}
-static inline void lock_extent_range(struct inode *inode, u64 off, u64 len)
+static int gather_extent_pages(struct inode *inode, struct page **pages,
+ int num_pages, u64 off)
+{
+ int i;
+ pgoff_t index = off >> PAGE_CACHE_SHIFT;
+
+ for (i = 0; i < num_pages; i++) {
+again:
+ pages[i] = extent_same_get_page(inode, index + i);
+ if (IS_ERR(pages[i])) {
+ int err = PTR_ERR(pages[i]);
+
+ if (err == -EAGAIN)
+ goto again;
+ pages[i] = NULL;
+ return err;
+ }
+ }
+ return 0;
+}
+
+static int lock_extent_range(struct inode *inode, u64 off, u64 len,
+ bool retry_range_locking)
{
- /* do any pending delalloc/csum calc on src, one way or
- another, and lock file content */
+ /*
+ * Do any pending delalloc/csum calculations on inode, one way or
+ * another, and lock file content.
+ * The locking order is:
+ *
+ * 1) pages
+ * 2) range in the inode's io tree
+ */
while (1) {
struct btrfs_ordered_extent *ordered;
lock_extent(&BTRFS_I(inode)->io_tree, off, off + len - 1);
@@ -2802,56 +2862,140 @@ static inline void lock_extent_range(struct inode *inode, u64 off, u64 len)
unlock_extent(&BTRFS_I(inode)->io_tree, off, off + len - 1);
if (ordered)
btrfs_put_ordered_extent(ordered);
+ if (!retry_range_locking)
+ return -EAGAIN;
btrfs_wait_ordered_range(inode, off, len);
}
+ return 0;
}
-static void btrfs_double_unlock(struct inode *inode1, u64 loff1,
- struct inode *inode2, u64 loff2, u64 len)
+static void btrfs_double_inode_unlock(struct inode *inode1, struct inode *inode2)
{
- unlock_extent(&BTRFS_I(inode1)->io_tree, loff1, loff1 + len - 1);
- unlock_extent(&BTRFS_I(inode2)->io_tree, loff2, loff2 + len - 1);
-
mutex_unlock(&inode1->i_mutex);
mutex_unlock(&inode2->i_mutex);
}
-static void btrfs_double_lock(struct inode *inode1, u64 loff1,
- struct inode *inode2, u64 loff2, u64 len)
+static void btrfs_double_inode_lock(struct inode *inode1, struct inode *inode2)
{
+ if (inode1 < inode2)
+ swap(inode1, inode2);
+
+ mutex_lock_nested(&inode1->i_mutex, I_MUTEX_PARENT);
+ mutex_lock_nested(&inode2->i_mutex, I_MUTEX_CHILD);
+}
+
+static void btrfs_double_extent_unlock(struct inode *inode1, u64 loff1,
+ struct inode *inode2, u64 loff2, u64 len)
+{
+ unlock_extent(&BTRFS_I(inode1)->io_tree, loff1, loff1 + len - 1);
+ unlock_extent(&BTRFS_I(inode2)->io_tree, loff2, loff2 + len - 1);
+}
+
+static int btrfs_double_extent_lock(struct inode *inode1, u64 loff1,
+ struct inode *inode2, u64 loff2, u64 len,
+ bool retry_range_locking)
+{
+ int ret;
+
if (inode1 < inode2) {
swap(inode1, inode2);
swap(loff1, loff2);
}
+ ret = lock_extent_range(inode1, loff1, len, retry_range_locking);
+ if (ret)
+ return ret;
+ ret = lock_extent_range(inode2, loff2, len, retry_range_locking);
+ if (ret)
+ unlock_extent(&BTRFS_I(inode1)->io_tree, loff1,
+ loff1 + len - 1);
+ return ret;
+}
- mutex_lock_nested(&inode1->i_mutex, I_MUTEX_PARENT);
- lock_extent_range(inode1, loff1, len);
- if (inode1 != inode2) {
- mutex_lock_nested(&inode2->i_mutex, I_MUTEX_CHILD);
- lock_extent_range(inode2, loff2, len);
+struct cmp_pages {
+ int num_pages;
+ struct page **src_pages;
+ struct page **dst_pages;
+};
+
+static void btrfs_cmp_data_free(struct cmp_pages *cmp)
+{
+ int i;
+ struct page *pg;
+
+ for (i = 0; i < cmp->num_pages; i++) {
+ pg = cmp->src_pages[i];
+ if (pg) {
+ unlock_page(pg);
+ page_cache_release(pg);
+ }
+ pg = cmp->dst_pages[i];
+ if (pg) {
+ unlock_page(pg);
+ page_cache_release(pg);
+ }
}
+ kfree(cmp->src_pages);
+ kfree(cmp->dst_pages);
+}
+
+static int btrfs_cmp_data_prepare(struct inode *src, u64 loff,
+ struct inode *dst, u64 dst_loff,
+ u64 len, struct cmp_pages *cmp)
+{
+ int ret;
+ int num_pages = PAGE_CACHE_ALIGN(len) >> PAGE_CACHE_SHIFT;
+ struct page **src_pgarr, **dst_pgarr;
+
+ /*
+ * We must gather up all the pages before we initiate our
+ * extent locking. We use an array for the page pointers. Size
+ * of the array is bounded by len, which is in turn bounded by
+ * BTRFS_MAX_DEDUPE_LEN.
+ */
+ src_pgarr = kzalloc(num_pages * sizeof(struct page *), GFP_NOFS);
+ dst_pgarr = kzalloc(num_pages * sizeof(struct page *), GFP_NOFS);
+ if (!src_pgarr || !dst_pgarr) {
+ kfree(src_pgarr);
+ kfree(dst_pgarr);
+ return -ENOMEM;
+ }
+ cmp->num_pages = num_pages;
+ cmp->src_pages = src_pgarr;
+ cmp->dst_pages = dst_pgarr;
+
+ ret = gather_extent_pages(src, cmp->src_pages, cmp->num_pages, loff);
+ if (ret)
+ goto out;
+
+ ret = gather_extent_pages(dst, cmp->dst_pages, cmp->num_pages, dst_loff);
+
+out:
+ if (ret)
+ btrfs_cmp_data_free(cmp);
+ return 0;
}
static int btrfs_cmp_data(struct inode *src, u64 loff, struct inode *dst,
- u64 dst_loff, u64 len)
+ u64 dst_loff, u64 len, struct cmp_pages *cmp)
{
int ret = 0;
+ int i;
struct page *src_page, *dst_page;
unsigned int cmp_len = PAGE_CACHE_SIZE;
void *addr, *dst_addr;
+ i = 0;
while (len) {
if (len < PAGE_CACHE_SIZE)
cmp_len = len;
- src_page = extent_same_get_page(src, loff);
- if (!src_page)
- return -EINVAL;
- dst_page = extent_same_get_page(dst, dst_loff);
- if (!dst_page) {
- page_cache_release(src_page);
- return -EINVAL;
- }
+ BUG_ON(i >= cmp->num_pages);
+
+ src_page = cmp->src_pages[i];
+ dst_page = cmp->dst_pages[i];
+ ASSERT(PageLocked(src_page));
+ ASSERT(PageLocked(dst_page));
+
addr = kmap_atomic(src_page);
dst_addr = kmap_atomic(dst_page);
@@ -2863,26 +3007,30 @@ static int btrfs_cmp_data(struct inode *src, u64 loff, struct inode *dst,
kunmap_atomic(addr);
kunmap_atomic(dst_addr);
- page_cache_release(src_page);
- page_cache_release(dst_page);
if (ret)
break;
- loff += cmp_len;
- dst_loff += cmp_len;
len -= cmp_len;
+ i++;
}
return ret;
}
-static int extent_same_check_offsets(struct inode *inode, u64 off, u64 len)
+static int extent_same_check_offsets(struct inode *inode, u64 off, u64 *plen,
+ u64 olen)
{
+ u64 len = *plen;
u64 bs = BTRFS_I(inode)->root->fs_info->sb->s_blocksize;
- if (off + len > inode->i_size || off + len < off)
+ if (off + olen > inode->i_size || off + olen < off)
return -EINVAL;
+
+ /* if we extend to eof, continue to block boundary */
+ if (off + len == inode->i_size)
+ *plen = len = ALIGN(inode->i_size, bs) - off;
+
/* Check that we are block aligned - btrfs_clone() requires this */
if (!IS_ALIGNED(off, bs) || !IS_ALIGNED(off + len, bs))
return -EINVAL;
@@ -2890,31 +3038,67 @@ static int extent_same_check_offsets(struct inode *inode, u64 off, u64 len)
return 0;
}
-static int btrfs_extent_same(struct inode *src, u64 loff, u64 len,
+static int btrfs_extent_same(struct inode *src, u64 loff, u64 olen,
struct inode *dst, u64 dst_loff)
{
int ret;
+ u64 len = olen;
+ struct cmp_pages cmp;
+ int same_inode = 0;
+ u64 same_lock_start = 0;
+ u64 same_lock_len = 0;
- /*
- * btrfs_clone() can't handle extents in the same file
- * yet. Once that works, we can drop this check and replace it
- * with a check for the same inode, but overlapping extents.
- */
if (src == dst)
- return -EINVAL;
+ same_inode = 1;
if (len == 0)
return 0;
- btrfs_double_lock(src, loff, dst, dst_loff, len);
+ if (same_inode) {
+ mutex_lock(&src->i_mutex);
- ret = extent_same_check_offsets(src, loff, len);
- if (ret)
- goto out_unlock;
+ ret = extent_same_check_offsets(src, loff, &len, olen);
+ if (ret)
+ goto out_unlock;
- ret = extent_same_check_offsets(dst, dst_loff, len);
- if (ret)
- goto out_unlock;
+ /*
+ * Single inode case wants the same checks, except we
+ * don't want our length pushed out past i_size as
+ * comparing that data range makes no sense.
+ *
+ * extent_same_check_offsets() will do this for an
+ * unaligned length at i_size, so catch it here and
+ * reject the request.
+ *
+ * This effectively means we require aligned extents
+ * for the single-inode case, whereas the other cases
+ * allow an unaligned length so long as it ends at
+ * i_size.
+ */
+ if (len != olen) {
+ ret = -EINVAL;
+ goto out_unlock;
+ }
+
+ /* Check for overlapping ranges */
+ if (dst_loff + len > loff && dst_loff < loff + len) {
+ ret = -EINVAL;
+ goto out_unlock;
+ }
+
+ same_lock_start = min_t(u64, loff, dst_loff);
+ same_lock_len = max_t(u64, loff, dst_loff) + len - same_lock_start;
+ } else {
+ btrfs_double_inode_lock(src, dst);
+
+ ret = extent_same_check_offsets(src, loff, &len, olen);
+ if (ret)
+ goto out_unlock;
+
+ ret = extent_same_check_offsets(dst, dst_loff, &len, olen);
+ if (ret)
+ goto out_unlock;
+ }
/* don't make the dst file partly checksummed */
if ((BTRFS_I(src)->flags & BTRFS_INODE_NODATASUM) !=
@@ -2923,12 +3107,64 @@ static int btrfs_extent_same(struct inode *src, u64 loff, u64 len,
goto out_unlock;
}
- ret = btrfs_cmp_data(src, loff, dst, dst_loff, len);
+again:
+ ret = btrfs_cmp_data_prepare(src, loff, dst, dst_loff, olen, &cmp);
+ if (ret)
+ goto out_unlock;
+
+ if (same_inode)
+ ret = lock_extent_range(src, same_lock_start, same_lock_len,
+ false);
+ else
+ ret = btrfs_double_extent_lock(src, loff, dst, dst_loff, len,
+ false);
+ /*
+ * If one of the inodes has dirty pages in the respective range or
+ * ordered extents, we need to flush dellaloc and wait for all ordered
+ * extents in the range. We must unlock the pages and the ranges in the
+ * io trees to avoid deadlocks when flushing delalloc (requires locking
+ * pages) and when waiting for ordered extents to complete (they require
+ * range locking).
+ */
+ if (ret == -EAGAIN) {
+ /*
+ * Ranges in the io trees already unlocked. Now unlock all
+ * pages before waiting for all IO to complete.
+ */
+ btrfs_cmp_data_free(&cmp);
+ if (same_inode) {
+ btrfs_wait_ordered_range(src, same_lock_start,
+ same_lock_len);
+ } else {
+ btrfs_wait_ordered_range(src, loff, len);
+ btrfs_wait_ordered_range(dst, dst_loff, len);
+ }
+ goto again;
+ }
+ ASSERT(ret == 0);
+ if (WARN_ON(ret)) {
+ /* ranges in the io trees already unlocked */
+ btrfs_cmp_data_free(&cmp);
+ return ret;
+ }
+
+ /* pass original length for comparison so we stay within i_size */
+ ret = btrfs_cmp_data(src, loff, dst, dst_loff, olen, &cmp);
if (ret == 0)
- ret = btrfs_clone(src, dst, loff, len, len, dst_loff);
+ ret = btrfs_clone(src, dst, loff, olen, len, dst_loff, 1);
+ if (same_inode)
+ unlock_extent(&BTRFS_I(src)->io_tree, same_lock_start,
+ same_lock_start + same_lock_len - 1);
+ else
+ btrfs_double_extent_unlock(src, loff, dst, dst_loff, len);
+
+ btrfs_cmp_data_free(&cmp);
out_unlock:
- btrfs_double_unlock(src, loff, dst, dst_loff, len);
+ if (same_inode)
+ mutex_unlock(&src->i_mutex);
+ else
+ btrfs_double_inode_unlock(src, dst);
return ret;
}
@@ -3043,52 +3279,19 @@ out:
return ret;
}
-/* Helper to check and see if this root currently has a ref on the given disk
- * bytenr. If it does then we need to update the quota for this root. This
- * doesn't do anything if quotas aren't enabled.
- */
-static int check_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
- u64 disko)
-{
- struct seq_list tree_mod_seq_elem = SEQ_LIST_INIT(tree_mod_seq_elem);
- struct ulist *roots;
- struct ulist_iterator uiter;
- struct ulist_node *root_node = NULL;
- int ret;
-
- if (!root->fs_info->quota_enabled)
- return 1;
-
- btrfs_get_tree_mod_seq(root->fs_info, &tree_mod_seq_elem);
- ret = btrfs_find_all_roots(trans, root->fs_info, disko,
- tree_mod_seq_elem.seq, &roots);
- if (ret < 0)
- goto out;
- ret = 0;
- ULIST_ITER_INIT(&uiter);
- while ((root_node = ulist_next(roots, &uiter))) {
- if (root_node->val == root->objectid) {
- ret = 1;
- break;
- }
- }
- ulist_free(roots);
-out:
- btrfs_put_tree_mod_seq(root->fs_info, &tree_mod_seq_elem);
- return ret;
-}
-
static int clone_finish_inode_update(struct btrfs_trans_handle *trans,
struct inode *inode,
u64 endoff,
const u64 destoff,
- const u64 olen)
+ const u64 olen,
+ int no_time_update)
{
struct btrfs_root *root = BTRFS_I(inode)->root;
int ret;
inode_inc_iversion(inode);
- inode->i_mtime = inode->i_ctime = CURRENT_TIME;
+ if (!no_time_update)
+ inode->i_mtime = inode->i_ctime = CURRENT_TIME;
/*
* We round up to the block size at eof when determining which
* extents to clone above, but shouldn't round up the file size.
@@ -3166,6 +3369,150 @@ static void clone_update_extent_map(struct inode *inode,
&BTRFS_I(inode)->runtime_flags);
}
+/*
+ * Make sure we do not end up inserting an inline extent into a file that has
+ * already other (non-inline) extents. If a file has an inline extent it can
+ * not have any other extents and the (single) inline extent must start at the
+ * file offset 0. Failing to respect these rules will lead to file corruption,
+ * resulting in EIO errors on read/write operations, hitting BUG_ON's in mm, etc
+ *
+ * We can have extents that have been already written to disk or we can have
+ * dirty ranges still in delalloc, in which case the extent maps and items are
+ * created only when we run delalloc, and the delalloc ranges might fall outside
+ * the range we are currently locking in the inode's io tree. So we check the
+ * inode's i_size because of that (i_size updates are done while holding the
+ * i_mutex, which we are holding here).
+ * We also check to see if the inode has a size not greater than "datal" but has
+ * extents beyond it, due to an fallocate with FALLOC_FL_KEEP_SIZE (and we are
+ * protected against such concurrent fallocate calls by the i_mutex).
+ *
+ * If the file has no extents but a size greater than datal, do not allow the
+ * copy because we would need turn the inline extent into a non-inline one (even
+ * with NO_HOLES enabled). If we find our destination inode only has one inline
+ * extent, just overwrite it with the source inline extent if its size is less
+ * than the source extent's size, or we could copy the source inline extent's
+ * data into the destination inode's inline extent if the later is greater then
+ * the former.
+ */
+static int clone_copy_inline_extent(struct inode *src,
+ struct inode *dst,
+ struct btrfs_trans_handle *trans,
+ struct btrfs_path *path,
+ struct btrfs_key *new_key,
+ const u64 drop_start,
+ const u64 datal,
+ const u64 skip,
+ const u64 size,
+ char *inline_data)
+{
+ struct btrfs_root *root = BTRFS_I(dst)->root;
+ const u64 aligned_end = ALIGN(new_key->offset + datal,
+ root->sectorsize);
+ int ret;
+ struct btrfs_key key;
+
+ if (new_key->offset > 0)
+ return -EOPNOTSUPP;
+
+ key.objectid = btrfs_ino(dst);
+ key.type = BTRFS_EXTENT_DATA_KEY;
+ key.offset = 0;
+ ret = btrfs_search_slot(NULL, root, &key, path, 0, 0);
+ if (ret < 0) {
+ return ret;
+ } else if (ret > 0) {
+ if (path->slots[0] >= btrfs_header_nritems(path->nodes[0])) {
+ ret = btrfs_next_leaf(root, path);
+ if (ret < 0)
+ return ret;
+ else if (ret > 0)
+ goto copy_inline_extent;
+ }
+ btrfs_item_key_to_cpu(path->nodes[0], &key, path->slots[0]);
+ if (key.objectid == btrfs_ino(dst) &&
+ key.type == BTRFS_EXTENT_DATA_KEY) {
+ ASSERT(key.offset > 0);
+ return -EOPNOTSUPP;
+ }
+ } else if (i_size_read(dst) <= datal) {
+ struct btrfs_file_extent_item *ei;
+ u64 ext_len;
+
+ /*
+ * If the file size is <= datal, make sure there are no other
+ * extents following (can happen do to an fallocate call with
+ * the flag FALLOC_FL_KEEP_SIZE).
+ */
+ ei = btrfs_item_ptr(path->nodes[0], path->slots[0],
+ struct btrfs_file_extent_item);
+ /*
+ * If it's an inline extent, it can not have other extents
+ * following it.
+ */
+ if (btrfs_file_extent_type(path->nodes[0], ei) ==
+ BTRFS_FILE_EXTENT_INLINE)
+ goto copy_inline_extent;
+
+ ext_len = btrfs_file_extent_num_bytes(path->nodes[0], ei);
+ if (ext_len > aligned_end)
+ return -EOPNOTSUPP;
+
+ ret = btrfs_next_item(root, path);
+ if (ret < 0) {
+ return ret;
+ } else if (ret == 0) {
+ btrfs_item_key_to_cpu(path->nodes[0], &key,
+ path->slots[0]);
+ if (key.objectid == btrfs_ino(dst) &&
+ key.type == BTRFS_EXTENT_DATA_KEY)
+ return -EOPNOTSUPP;
+ }
+ }
+
+copy_inline_extent:
+ /*
+ * We have no extent items, or we have an extent at offset 0 which may
+ * or may not be inlined. All these cases are dealt the same way.
+ */
+ if (i_size_read(dst) > datal) {
+ /*
+ * If the destination inode has an inline extent...
+ * This would require copying the data from the source inline
+ * extent into the beginning of the destination's inline extent.
+ * But this is really complex, both extents can be compressed
+ * or just one of them, which would require decompressing and
+ * re-compressing data (which could increase the new compressed
+ * size, not allowing the compressed data to fit anymore in an
+ * inline extent).
+ * So just don't support this case for now (it should be rare,
+ * we are not really saving space when cloning inline extents).
+ */
+ return -EOPNOTSUPP;
+ }
+
+ btrfs_release_path(path);
+ ret = btrfs_drop_extents(trans, root, dst, drop_start, aligned_end, 1);
+ if (ret)
+ return ret;
+ ret = btrfs_insert_empty_item(trans, root, path, new_key, size);
+ if (ret)
+ return ret;
+
+ if (skip) {
+ const u32 start = btrfs_file_extent_calc_inline_size(0);
+
+ memmove(inline_data + start, inline_data + start + skip, datal);
+ }
+
+ write_extent_buffer(path->nodes[0], inline_data,
+ btrfs_item_ptr_offset(path->nodes[0],
+ path->slots[0]),
+ size);
+ inode_add_bytes(dst, datal);
+
+ return 0;
+}
+
/**
* btrfs_clone() - clone a range from inode file to another
*
@@ -3173,13 +3520,13 @@ static void clone_update_extent_map(struct inode *inode,
* @inode: Inode to clone to
* @off: Offset within source to start clone from
* @olen: Original length, passed by user, of range to clone
- * @olen_aligned: Block-aligned value of olen, extent_same uses
- * identical values here
+ * @olen_aligned: Block-aligned value of olen
* @destoff: Offset within @inode to start clone
+ * @no_time_update: Whether to update mtime/ctime on the target inode
*/
static int btrfs_clone(struct inode *src, struct inode *inode,
const u64 off, const u64 olen, const u64 olen_aligned,
- const u64 destoff)
+ const u64 destoff, int no_time_update)
{
struct btrfs_root *root = BTRFS_I(inode)->root;
struct btrfs_path *path = NULL;
@@ -3190,9 +3537,7 @@ static int btrfs_clone(struct inode *src, struct inode *inode,
u32 nritems;
int slot;
int ret;
- int no_quota;
const u64 len = olen_aligned;
- u64 last_disko = 0;
u64 last_dest_end = destoff;
ret = -ENOMEM;
@@ -3238,7 +3583,6 @@ static int btrfs_clone(struct inode *src, struct inode *inode,
nritems = btrfs_header_nritems(path->nodes[0]);
process_slot:
- no_quota = 1;
if (path->slots[0] >= nritems) {
ret = btrfs_next_leaf(BTRFS_I(src)->root, path);
if (ret < 0)
@@ -3390,35 +3734,13 @@ process_slot:
btrfs_set_file_extent_num_bytes(leaf, extent,
datal);
- /*
- * We need to look up the roots that point at
- * this bytenr and see if the new root does. If
- * it does not we need to make sure we update
- * quotas appropriately.
- */
- if (disko && root != BTRFS_I(src)->root &&
- disko != last_disko) {
- no_quota = check_ref(trans, root,
- disko);
- if (no_quota < 0) {
- btrfs_abort_transaction(trans,
- root,
- ret);
- btrfs_end_transaction(trans,
- root);
- ret = no_quota;
- goto out;
- }
- }
-
if (disko) {
inode_add_bytes(inode, datal);
ret = btrfs_inc_extent_ref(trans, root,
disko, diskl, 0,
root->root_key.objectid,
btrfs_ino(inode),
- new_key.offset - datao,
- no_quota);
+ new_key.offset - datao);
if (ret) {
btrfs_abort_transaction(trans,
root,
@@ -3432,21 +3754,6 @@ process_slot:
} else if (type == BTRFS_FILE_EXTENT_INLINE) {
u64 skip = 0;
u64 trim = 0;
- u64 aligned_end = 0;
-
- /*
- * Don't copy an inline extent into an offset
- * greater than zero. Having an inline extent
- * at such an offset results in chaos as btrfs
- * isn't prepared for such cases. Just skip
- * this case for the same reasons as commented
- * at btrfs_ioctl_clone().
- */
- if (last_dest_end > 0) {
- ret = -EOPNOTSUPP;
- btrfs_end_transaction(trans, root);
- goto out;
- }
if (off > key.offset) {
skip = off - key.offset;
@@ -3464,42 +3771,22 @@ process_slot:
size -= skip + trim;
datal -= skip + trim;
- aligned_end = ALIGN(new_key.offset + datal,
- root->sectorsize);
- ret = btrfs_drop_extents(trans, root, inode,
- drop_start,
- aligned_end,
- 1);
+ ret = clone_copy_inline_extent(src, inode,
+ trans, path,
+ &new_key,
+ drop_start,
+ datal,
+ skip, size, buf);
if (ret) {
if (ret != -EOPNOTSUPP)
btrfs_abort_transaction(trans,
- root, ret);
- btrfs_end_transaction(trans, root);
- goto out;
- }
-
- ret = btrfs_insert_empty_item(trans, root, path,
- &new_key, size);
- if (ret) {
- btrfs_abort_transaction(trans, root,
- ret);
+ root,
+ ret);
btrfs_end_transaction(trans, root);
goto out;
}
-
- if (skip) {
- u32 start =
- btrfs_file_extent_calc_inline_size(0);
- memmove(buf+start, buf+start+skip,
- datal);
- }
-
leaf = path->nodes[0];
slot = path->slots[0];
- write_extent_buffer(leaf, buf,
- btrfs_item_ptr_offset(leaf, slot),
- size);
- inode_add_bytes(inode, datal);
}
/* If we have an implicit hole (NO_HOLES feature). */
@@ -3517,7 +3804,8 @@ process_slot:
root->sectorsize);
ret = clone_finish_inode_update(trans, inode,
last_dest_end,
- destoff, olen);
+ destoff, olen,
+ no_time_update);
if (ret)
goto out;
if (new_key.offset + datal >= destoff + len)
@@ -3555,7 +3843,7 @@ process_slot:
clone_update_extent_map(inode, trans, NULL, last_dest_end,
destoff + len - last_dest_end);
ret = clone_finish_inode_update(trans, inode, destoff + len,
- destoff, olen);
+ destoff, olen, no_time_update);
}
out:
@@ -3632,13 +3920,7 @@ static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd,
goto out_fput;
if (!same_inode) {
- if (inode < src) {
- mutex_lock_nested(&inode->i_mutex, I_MUTEX_PARENT);
- mutex_lock_nested(&src->i_mutex, I_MUTEX_CHILD);
- } else {
- mutex_lock_nested(&src->i_mutex, I_MUTEX_PARENT);
- mutex_lock_nested(&inode->i_mutex, I_MUTEX_CHILD);
- }
+ btrfs_double_inode_lock(src, inode);
} else {
mutex_lock(&src->i_mutex);
}
@@ -3686,13 +3968,18 @@ static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd,
u64 lock_start = min_t(u64, off, destoff);
u64 lock_len = max_t(u64, off, destoff) + len - lock_start;
- lock_extent_range(src, lock_start, lock_len);
+ ret = lock_extent_range(src, lock_start, lock_len, true);
} else {
- lock_extent_range(src, off, len);
- lock_extent_range(inode, destoff, len);
+ ret = btrfs_double_extent_lock(src, off, inode, destoff, len,
+ true);
+ }
+ ASSERT(ret == 0);
+ if (WARN_ON(ret)) {
+ /* ranges in the io trees already unlocked */
+ goto out_unlock;
}
- ret = btrfs_clone(src, inode, off, olen, len, destoff);
+ ret = btrfs_clone(src, inode, off, olen, len, destoff, 0);
if (same_inode) {
u64 lock_start = min_t(u64, off, destoff);
@@ -3700,9 +3987,7 @@ static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd,
unlock_extent(&BTRFS_I(src)->io_tree, lock_start, lock_end);
} else {
- unlock_extent(&BTRFS_I(src)->io_tree, off, off + len - 1);
- unlock_extent(&BTRFS_I(inode)->io_tree, destoff,
- destoff + len - 1);
+ btrfs_double_extent_unlock(src, off, inode, destoff, len);
}
/*
* Truncate page cache pages so that future reads will see the cloned
@@ -3711,17 +3996,10 @@ static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd,
truncate_inode_pages_range(&inode->i_data, destoff,
PAGE_CACHE_ALIGN(destoff + len) - 1);
out_unlock:
- if (!same_inode) {
- if (inode < src) {
- mutex_unlock(&src->i_mutex);
- mutex_unlock(&inode->i_mutex);
- } else {
- mutex_unlock(&inode->i_mutex);
- mutex_unlock(&src->i_mutex);
- }
- } else {
+ if (!same_inode)
+ btrfs_double_inode_unlock(src, inode);
+ else
mutex_unlock(&src->i_mutex);
- }
out_fput:
fdput(src_file);
out_drop_write:
@@ -4492,6 +4770,11 @@ locked:
bctl->flags |= BTRFS_BALANCE_TYPE_MASK;
}
+ if (bctl->flags & ~(BTRFS_BALANCE_ARGS_MASK | BTRFS_BALANCE_TYPE_MASK)) {
+ ret = -EINVAL;
+ goto out_bctl;
+ }
+
do_balance:
/*
* Ownership of bctl and mutually_exclusive_operation_running
@@ -4503,12 +4786,15 @@ do_balance:
need_unlock = false;
ret = btrfs_balance(bctl, bargs);
+ bctl = NULL;
if (arg) {
if (copy_to_user(arg, bargs, sizeof(*bargs)))
ret = -EFAULT;
}
+out_bctl:
+ kfree(bctl);
out_bargs:
kfree(bargs);
out_unlock:
@@ -4659,7 +4945,7 @@ static long btrfs_ioctl_qgroup_assign(struct file *file, void __user *arg)
/* update qgroup status and info */
err = btrfs_run_qgroups(trans, root->fs_info);
if (err < 0)
- btrfs_error(root->fs_info, ret,
+ btrfs_std_error(root->fs_info, ret,
"failed to update qgroup status and info\n");
err = btrfs_end_transaction(trans, root);
if (err && !ret)
diff --git a/kernel/fs/btrfs/locking.c b/kernel/fs/btrfs/locking.c
index f8229ef1b..8077461fc 100644
--- a/kernel/fs/btrfs/locking.c
+++ b/kernel/fs/btrfs/locking.c
@@ -79,6 +79,9 @@ void btrfs_clear_lock_blocking_rw(struct extent_buffer *eb, int rw)
write_lock(&eb->lock);
WARN_ON(atomic_read(&eb->spinning_writers));
atomic_inc(&eb->spinning_writers);
+ /*
+ * atomic_dec_and_test implies a barrier for waitqueue_active
+ */
if (atomic_dec_and_test(&eb->blocking_writers) &&
waitqueue_active(&eb->write_lock_wq))
wake_up(&eb->write_lock_wq);
@@ -86,6 +89,9 @@ void btrfs_clear_lock_blocking_rw(struct extent_buffer *eb, int rw)
BUG_ON(atomic_read(&eb->blocking_readers) == 0);
read_lock(&eb->lock);
atomic_inc(&eb->spinning_readers);
+ /*
+ * atomic_dec_and_test implies a barrier for waitqueue_active
+ */
if (atomic_dec_and_test(&eb->blocking_readers) &&
waitqueue_active(&eb->read_lock_wq))
wake_up(&eb->read_lock_wq);
@@ -229,6 +235,9 @@ void btrfs_tree_read_unlock_blocking(struct extent_buffer *eb)
}
btrfs_assert_tree_read_locked(eb);
WARN_ON(atomic_read(&eb->blocking_readers) == 0);
+ /*
+ * atomic_dec_and_test implies a barrier for waitqueue_active
+ */
if (atomic_dec_and_test(&eb->blocking_readers) &&
waitqueue_active(&eb->read_lock_wq))
wake_up(&eb->read_lock_wq);
@@ -241,6 +250,7 @@ void btrfs_tree_read_unlock_blocking(struct extent_buffer *eb)
*/
void btrfs_tree_lock(struct extent_buffer *eb)
{
+ WARN_ON(eb->lock_owner == current->pid);
again:
wait_event(eb->read_lock_wq, atomic_read(&eb->blocking_readers) == 0);
wait_event(eb->write_lock_wq, atomic_read(&eb->blocking_writers) == 0);
@@ -279,6 +289,9 @@ void btrfs_tree_unlock(struct extent_buffer *eb)
if (blockers) {
WARN_ON(atomic_read(&eb->spinning_writers));
atomic_dec(&eb->blocking_writers);
+ /*
+ * Make sure counter is updated before we wake up waiters.
+ */
smp_mb();
if (waitqueue_active(&eb->write_lock_wq))
wake_up(&eb->write_lock_wq);
diff --git a/kernel/fs/btrfs/ordered-data.c b/kernel/fs/btrfs/ordered-data.c
index 760c4a5e0..8c27292ea 100644
--- a/kernel/fs/btrfs/ordered-data.c
+++ b/kernel/fs/btrfs/ordered-data.c
@@ -198,9 +198,6 @@ static int __btrfs_add_ordered_extent(struct inode *inode, u64 file_offset,
entry->file_offset = file_offset;
entry->start = start;
entry->len = len;
- if (!(BTRFS_I(inode)->flags & BTRFS_INODE_NODATASUM) &&
- !(type == BTRFS_ORDERED_NOCOW))
- entry->csum_bytes_left = disk_len;
entry->disk_len = disk_len;
entry->bytes_left = len;
entry->inode = igrab(inode);
@@ -286,10 +283,6 @@ void btrfs_add_ordered_sum(struct inode *inode,
tree = &BTRFS_I(inode)->ordered_tree;
spin_lock_irq(&tree->lock);
list_add_tail(&sum->list, &entry->list);
- WARN_ON(entry->csum_bytes_left < sum->len);
- entry->csum_bytes_left -= sum->len;
- if (entry->csum_bytes_left == 0)
- wake_up(&entry->wait);
spin_unlock_irq(&tree->lock);
}
@@ -352,6 +345,9 @@ int btrfs_dec_test_first_ordered_pending(struct inode *inode,
if (entry->bytes_left == 0) {
ret = test_and_set_bit(BTRFS_ORDERED_IO_DONE, &entry->flags);
+ /*
+ * Implicit memory barrier after test_and_set_bit
+ */
if (waitqueue_active(&entry->wait))
wake_up(&entry->wait);
} else {
@@ -416,6 +412,9 @@ have_entry:
if (entry->bytes_left == 0) {
ret = test_and_set_bit(BTRFS_ORDERED_IO_DONE, &entry->flags);
+ /*
+ * Implicit memory barrier after test_and_set_bit
+ */
if (waitqueue_active(&entry->wait))
wake_up(&entry->wait);
} else {
@@ -491,15 +490,16 @@ void btrfs_wait_logged_extents(struct btrfs_trans_handle *trans,
spin_lock_irq(&log->log_extents_lock[index]);
while (!list_empty(&log->logged_list[index])) {
+ struct inode *inode;
ordered = list_first_entry(&log->logged_list[index],
struct btrfs_ordered_extent,
log_list);
list_del_init(&ordered->log_list);
+ inode = ordered->inode;
spin_unlock_irq(&log->log_extents_lock[index]);
if (!test_bit(BTRFS_ORDERED_IO_DONE, &ordered->flags) &&
!test_bit(BTRFS_ORDERED_DIRECT, &ordered->flags)) {
- struct inode *inode = ordered->inode;
u64 start = ordered->file_offset;
u64 end = ordered->file_offset + ordered->len - 1;
@@ -509,7 +509,26 @@ void btrfs_wait_logged_extents(struct btrfs_trans_handle *trans,
wait_event(ordered->wait, test_bit(BTRFS_ORDERED_IO_DONE,
&ordered->flags));
- list_add_tail(&ordered->trans_list, &trans->ordered);
+ /*
+ * In order to keep us from losing our ordered extent
+ * information when committing the transaction we have to make
+ * sure that any logged extents are completed when we go to
+ * commit the transaction. To do this we simply increase the
+ * current transactions pending_ordered counter and decrement it
+ * when the ordered extent completes.
+ */
+ if (!test_bit(BTRFS_ORDERED_COMPLETE, &ordered->flags)) {
+ struct btrfs_ordered_inode_tree *tree;
+
+ tree = &BTRFS_I(inode)->ordered_tree;
+ spin_lock_irq(&tree->lock);
+ if (!test_bit(BTRFS_ORDERED_COMPLETE, &ordered->flags)) {
+ set_bit(BTRFS_ORDERED_PENDING, &ordered->flags);
+ atomic_inc(&trans->transaction->pending_ordered);
+ }
+ spin_unlock_irq(&tree->lock);
+ }
+ btrfs_put_ordered_extent(ordered);
spin_lock_irq(&log->log_extents_lock[index]);
}
spin_unlock_irq(&log->log_extents_lock[index]);
@@ -545,6 +564,10 @@ void btrfs_put_ordered_extent(struct btrfs_ordered_extent *entry)
trace_btrfs_ordered_extent_put(entry->inode, entry);
if (atomic_dec_and_test(&entry->refs)) {
+ ASSERT(list_empty(&entry->log_list));
+ ASSERT(list_empty(&entry->trans_list));
+ ASSERT(list_empty(&entry->root_extent_list));
+ ASSERT(RB_EMPTY_NODE(&entry->rb_node));
if (entry->inode)
btrfs_add_delayed_iput(entry->inode);
while (!list_empty(&entry->list)) {
@@ -567,16 +590,47 @@ void btrfs_remove_ordered_extent(struct inode *inode,
struct btrfs_ordered_inode_tree *tree;
struct btrfs_root *root = BTRFS_I(inode)->root;
struct rb_node *node;
+ bool dec_pending_ordered = false;
tree = &BTRFS_I(inode)->ordered_tree;
spin_lock_irq(&tree->lock);
node = &entry->rb_node;
rb_erase(node, &tree->tree);
+ RB_CLEAR_NODE(node);
if (tree->last == node)
tree->last = NULL;
set_bit(BTRFS_ORDERED_COMPLETE, &entry->flags);
+ if (test_and_clear_bit(BTRFS_ORDERED_PENDING, &entry->flags))
+ dec_pending_ordered = true;
spin_unlock_irq(&tree->lock);
+ /*
+ * The current running transaction is waiting on us, we need to let it
+ * know that we're complete and wake it up.
+ */
+ if (dec_pending_ordered) {
+ struct btrfs_transaction *trans;
+
+ /*
+ * The checks for trans are just a formality, it should be set,
+ * but if it isn't we don't want to deref/assert under the spin
+ * lock, so be nice and check if trans is set, but ASSERT() so
+ * if it isn't set a developer will notice.
+ */
+ spin_lock(&root->fs_info->trans_lock);
+ trans = root->fs_info->running_transaction;
+ if (trans)
+ atomic_inc(&trans->use_count);
+ spin_unlock(&root->fs_info->trans_lock);
+
+ ASSERT(trans);
+ if (trans) {
+ if (atomic_dec_and_test(&trans->pending_ordered))
+ wake_up(&trans->pending_wait);
+ btrfs_put_transaction(trans);
+ }
+ }
+
spin_lock(&root->ordered_extent_lock);
list_del_init(&entry->root_extent_list);
root->nr_ordered_extents--;
@@ -844,6 +898,20 @@ out:
return entry;
}
+bool btrfs_have_ordered_extents_in_range(struct inode *inode,
+ u64 file_offset,
+ u64 len)
+{
+ struct btrfs_ordered_extent *oe;
+
+ oe = btrfs_lookup_ordered_range(inode, file_offset, len);
+ if (oe) {
+ btrfs_put_ordered_extent(oe);
+ return true;
+ }
+ return false;
+}
+
/*
* lookup and return any extent before 'file_offset'. NULL is returned
* if none is found
diff --git a/kernel/fs/btrfs/ordered-data.h b/kernel/fs/btrfs/ordered-data.h
index e96cd4ccd..23c96059c 100644
--- a/kernel/fs/btrfs/ordered-data.h
+++ b/kernel/fs/btrfs/ordered-data.h
@@ -73,6 +73,8 @@ struct btrfs_ordered_sum {
#define BTRFS_ORDERED_LOGGED 10 /* Set when we've waited on this ordered extent
* in the logging code. */
+#define BTRFS_ORDERED_PENDING 11 /* We are waiting for this ordered extent to
+ * complete in the current transaction. */
struct btrfs_ordered_extent {
/* logical offset in the file */
u64 file_offset;
@@ -89,9 +91,6 @@ struct btrfs_ordered_extent {
/* number of bytes that still need writing */
u64 bytes_left;
- /* number of bytes that still need csumming */
- u64 csum_bytes_left;
-
/*
* the end of the ordered extent which is behind it but
* didn't update disk_i_size. Please see the comment of
@@ -191,6 +190,9 @@ btrfs_lookup_first_ordered_extent(struct inode * inode, u64 file_offset);
struct btrfs_ordered_extent *btrfs_lookup_ordered_range(struct inode *inode,
u64 file_offset,
u64 len);
+bool btrfs_have_ordered_extents_in_range(struct inode *inode,
+ u64 file_offset,
+ u64 len);
int btrfs_ordered_update_i_size(struct inode *inode, u64 offset,
struct btrfs_ordered_extent *ordered);
int btrfs_find_ordered_sum(struct inode *inode, u64 offset, u64 disk_bytenr,
diff --git a/kernel/fs/btrfs/props.c b/kernel/fs/btrfs/props.c
index dca137b04..f9e60231f 100644
--- a/kernel/fs/btrfs/props.c
+++ b/kernel/fs/btrfs/props.c
@@ -49,18 +49,16 @@ static struct prop_handler prop_handlers[] = {
.extract = prop_compression_extract,
.inheritable = 1
},
- {
- .xattr_name = NULL
- }
};
void __init btrfs_props_init(void)
{
- struct prop_handler *p;
+ int i;
hash_init(prop_handlers_ht);
- for (p = &prop_handlers[0]; p->xattr_name; p++) {
+ for (i = 0; i < ARRAY_SIZE(prop_handlers); i++) {
+ struct prop_handler *p = &prop_handlers[i];
u64 h = btrfs_name_hash(p->xattr_name, strlen(p->xattr_name));
hash_add(prop_handlers_ht, &p->node, h);
@@ -301,15 +299,16 @@ static int inherit_props(struct btrfs_trans_handle *trans,
struct inode *inode,
struct inode *parent)
{
- const struct prop_handler *h;
struct btrfs_root *root = BTRFS_I(inode)->root;
int ret;
+ int i;
if (!test_bit(BTRFS_INODE_HAS_PROPS,
&BTRFS_I(parent)->runtime_flags))
return 0;
- for (h = &prop_handlers[0]; h->xattr_name; h++) {
+ for (i = 0; i < ARRAY_SIZE(prop_handlers); i++) {
+ const struct prop_handler *h = &prop_handlers[i];
const char *value;
u64 num_bytes;
diff --git a/kernel/fs/btrfs/qgroup.c b/kernel/fs/btrfs/qgroup.c
index 3d6546581..5279fdae7 100644
--- a/kernel/fs/btrfs/qgroup.c
+++ b/kernel/fs/btrfs/qgroup.c
@@ -34,6 +34,7 @@
#include "extent_io.h"
#include "qgroup.h"
+
/* TODO XXX FIXME
* - subvol delete -> delete when ref goes to 0? delete limits also?
* - reorganize keys
@@ -84,11 +85,42 @@ struct btrfs_qgroup {
/*
* temp variables for accounting operations
+ * Refer to qgroup_shared_accouting() for details.
*/
u64 old_refcnt;
u64 new_refcnt;
};
+static void btrfs_qgroup_update_old_refcnt(struct btrfs_qgroup *qg, u64 seq,
+ int mod)
+{
+ if (qg->old_refcnt < seq)
+ qg->old_refcnt = seq;
+ qg->old_refcnt += mod;
+}
+
+static void btrfs_qgroup_update_new_refcnt(struct btrfs_qgroup *qg, u64 seq,
+ int mod)
+{
+ if (qg->new_refcnt < seq)
+ qg->new_refcnt = seq;
+ qg->new_refcnt += mod;
+}
+
+static inline u64 btrfs_qgroup_get_old_refcnt(struct btrfs_qgroup *qg, u64 seq)
+{
+ if (qg->old_refcnt < seq)
+ return 0;
+ return qg->old_refcnt - seq;
+}
+
+static inline u64 btrfs_qgroup_get_new_refcnt(struct btrfs_qgroup *qg, u64 seq)
+{
+ if (qg->new_refcnt < seq)
+ return 0;
+ return qg->new_refcnt - seq;
+}
+
/*
* glue structure to represent the relations between qgroups.
*/
@@ -344,7 +376,7 @@ int btrfs_read_qgroup_config(struct btrfs_fs_info *fs_info)
qgroup = find_qgroup_rb(fs_info, found_key.offset);
if ((qgroup && found_key.type == BTRFS_QGROUP_INFO_KEY) ||
(!qgroup && found_key.type == BTRFS_QGROUP_LIMIT_KEY)) {
- btrfs_err(fs_info, "inconsitent qgroup config");
+ btrfs_err(fs_info, "inconsistent qgroup config");
flags |= BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT;
}
if (!qgroup) {
@@ -961,9 +993,10 @@ int btrfs_quota_disable(struct btrfs_trans_handle *trans,
mutex_lock(&fs_info->qgroup_ioctl_lock);
if (!fs_info->quota_root)
goto out;
- spin_lock(&fs_info->qgroup_lock);
fs_info->quota_enabled = 0;
fs_info->pending_quota_state = 0;
+ btrfs_qgroup_wait_for_completion(fs_info);
+ spin_lock(&fs_info->qgroup_lock);
quota_root = fs_info->quota_root;
fs_info->quota_root = NULL;
fs_info->qgroup_flags &= ~BTRFS_QGROUP_STATUS_FLAG_ON;
@@ -1115,14 +1148,14 @@ int btrfs_add_qgroup_relation(struct btrfs_trans_handle *trans,
struct ulist *tmp;
int ret = 0;
- tmp = ulist_alloc(GFP_NOFS);
- if (!tmp)
- return -ENOMEM;
-
/* Check the level of src and dst first */
if (btrfs_qgroup_level(src) >= btrfs_qgroup_level(dst))
return -EINVAL;
+ tmp = ulist_alloc(GFP_NOFS);
+ if (!tmp)
+ return -ENOMEM;
+
mutex_lock(&fs_info->qgroup_ioctl_lock);
quota_root = fs_info->quota_root;
if (!quota_root) {
@@ -1317,6 +1350,11 @@ int btrfs_limit_qgroup(struct btrfs_trans_handle *trans,
struct btrfs_root *quota_root;
struct btrfs_qgroup *qgroup;
int ret = 0;
+ /* Sometimes we would want to clear the limit on this qgroup.
+ * To meet this requirement, we treat the -1 as a special value
+ * which tell kernel to clear the limit on this qgroup.
+ */
+ const u64 CLEAR_VALUE = -1;
mutex_lock(&fs_info->qgroup_ioctl_lock);
quota_root = fs_info->quota_root;
@@ -1332,14 +1370,42 @@ int btrfs_limit_qgroup(struct btrfs_trans_handle *trans,
}
spin_lock(&fs_info->qgroup_lock);
- if (limit->flags & BTRFS_QGROUP_LIMIT_MAX_RFER)
- qgroup->max_rfer = limit->max_rfer;
- if (limit->flags & BTRFS_QGROUP_LIMIT_MAX_EXCL)
- qgroup->max_excl = limit->max_excl;
- if (limit->flags & BTRFS_QGROUP_LIMIT_RSV_RFER)
- qgroup->rsv_rfer = limit->rsv_rfer;
- if (limit->flags & BTRFS_QGROUP_LIMIT_RSV_EXCL)
- qgroup->rsv_excl = limit->rsv_excl;
+ if (limit->flags & BTRFS_QGROUP_LIMIT_MAX_RFER) {
+ if (limit->max_rfer == CLEAR_VALUE) {
+ qgroup->lim_flags &= ~BTRFS_QGROUP_LIMIT_MAX_RFER;
+ limit->flags &= ~BTRFS_QGROUP_LIMIT_MAX_RFER;
+ qgroup->max_rfer = 0;
+ } else {
+ qgroup->max_rfer = limit->max_rfer;
+ }
+ }
+ if (limit->flags & BTRFS_QGROUP_LIMIT_MAX_EXCL) {
+ if (limit->max_excl == CLEAR_VALUE) {
+ qgroup->lim_flags &= ~BTRFS_QGROUP_LIMIT_MAX_EXCL;
+ limit->flags &= ~BTRFS_QGROUP_LIMIT_MAX_EXCL;
+ qgroup->max_excl = 0;
+ } else {
+ qgroup->max_excl = limit->max_excl;
+ }
+ }
+ if (limit->flags & BTRFS_QGROUP_LIMIT_RSV_RFER) {
+ if (limit->rsv_rfer == CLEAR_VALUE) {
+ qgroup->lim_flags &= ~BTRFS_QGROUP_LIMIT_RSV_RFER;
+ limit->flags &= ~BTRFS_QGROUP_LIMIT_RSV_RFER;
+ qgroup->rsv_rfer = 0;
+ } else {
+ qgroup->rsv_rfer = limit->rsv_rfer;
+ }
+ }
+ if (limit->flags & BTRFS_QGROUP_LIMIT_RSV_EXCL) {
+ if (limit->rsv_excl == CLEAR_VALUE) {
+ qgroup->lim_flags &= ~BTRFS_QGROUP_LIMIT_RSV_EXCL;
+ limit->flags &= ~BTRFS_QGROUP_LIMIT_RSV_EXCL;
+ qgroup->rsv_excl = 0;
+ } else {
+ qgroup->rsv_excl = limit->rsv_excl;
+ }
+ }
qgroup->lim_flags |= limit->flags;
spin_unlock(&fs_info->qgroup_lock);
@@ -1356,239 +1422,88 @@ out:
return ret;
}
-static int comp_oper_exist(struct btrfs_qgroup_operation *oper1,
- struct btrfs_qgroup_operation *oper2)
+int btrfs_qgroup_prepare_account_extents(struct btrfs_trans_handle *trans,
+ struct btrfs_fs_info *fs_info)
{
- /*
- * Ignore seq and type here, we're looking for any operation
- * at all related to this extent on that root.
- */
- if (oper1->bytenr < oper2->bytenr)
- return -1;
- if (oper1->bytenr > oper2->bytenr)
- return 1;
- if (oper1->ref_root < oper2->ref_root)
- return -1;
- if (oper1->ref_root > oper2->ref_root)
- return 1;
- return 0;
-}
+ struct btrfs_qgroup_extent_record *record;
+ struct btrfs_delayed_ref_root *delayed_refs;
+ struct rb_node *node;
+ u64 qgroup_to_skip;
+ int ret = 0;
-static int qgroup_oper_exists(struct btrfs_fs_info *fs_info,
- struct btrfs_qgroup_operation *oper)
-{
- struct rb_node *n;
- struct btrfs_qgroup_operation *cur;
- int cmp;
+ delayed_refs = &trans->transaction->delayed_refs;
+ qgroup_to_skip = delayed_refs->qgroup_to_skip;
- spin_lock(&fs_info->qgroup_op_lock);
- n = fs_info->qgroup_op_tree.rb_node;
- while (n) {
- cur = rb_entry(n, struct btrfs_qgroup_operation, n);
- cmp = comp_oper_exist(cur, oper);
- if (cmp < 0) {
- n = n->rb_right;
- } else if (cmp) {
- n = n->rb_left;
- } else {
- spin_unlock(&fs_info->qgroup_op_lock);
- return -EEXIST;
- }
+ /*
+ * No need to do lock, since this function will only be called in
+ * btrfs_commmit_transaction().
+ */
+ node = rb_first(&delayed_refs->dirty_extent_root);
+ while (node) {
+ record = rb_entry(node, struct btrfs_qgroup_extent_record,
+ node);
+ ret = btrfs_find_all_roots(NULL, fs_info, record->bytenr, 0,
+ &record->old_roots);
+ if (ret < 0)
+ break;
+ if (qgroup_to_skip)
+ ulist_del(record->old_roots, qgroup_to_skip, 0);
+ node = rb_next(node);
}
- spin_unlock(&fs_info->qgroup_op_lock);
- return 0;
+ return ret;
}
-static int comp_oper(struct btrfs_qgroup_operation *oper1,
- struct btrfs_qgroup_operation *oper2)
+struct btrfs_qgroup_extent_record
+*btrfs_qgroup_insert_dirty_extent(struct btrfs_delayed_ref_root *delayed_refs,
+ struct btrfs_qgroup_extent_record *record)
{
- if (oper1->bytenr < oper2->bytenr)
- return -1;
- if (oper1->bytenr > oper2->bytenr)
- return 1;
- if (oper1->ref_root < oper2->ref_root)
- return -1;
- if (oper1->ref_root > oper2->ref_root)
- return 1;
- if (oper1->seq < oper2->seq)
- return -1;
- if (oper1->seq > oper2->seq)
- return 1;
- if (oper1->type < oper2->type)
- return -1;
- if (oper1->type > oper2->type)
- return 1;
- return 0;
-}
+ struct rb_node **p = &delayed_refs->dirty_extent_root.rb_node;
+ struct rb_node *parent_node = NULL;
+ struct btrfs_qgroup_extent_record *entry;
+ u64 bytenr = record->bytenr;
-static int insert_qgroup_oper(struct btrfs_fs_info *fs_info,
- struct btrfs_qgroup_operation *oper)
-{
- struct rb_node **p;
- struct rb_node *parent = NULL;
- struct btrfs_qgroup_operation *cur;
- int cmp;
+ assert_spin_locked(&delayed_refs->lock);
- spin_lock(&fs_info->qgroup_op_lock);
- p = &fs_info->qgroup_op_tree.rb_node;
while (*p) {
- parent = *p;
- cur = rb_entry(parent, struct btrfs_qgroup_operation, n);
- cmp = comp_oper(cur, oper);
- if (cmp < 0) {
- p = &(*p)->rb_right;
- } else if (cmp) {
+ parent_node = *p;
+ entry = rb_entry(parent_node, struct btrfs_qgroup_extent_record,
+ node);
+ if (bytenr < entry->bytenr)
p = &(*p)->rb_left;
- } else {
- spin_unlock(&fs_info->qgroup_op_lock);
- return -EEXIST;
- }
- }
- rb_link_node(&oper->n, parent, p);
- rb_insert_color(&oper->n, &fs_info->qgroup_op_tree);
- spin_unlock(&fs_info->qgroup_op_lock);
- return 0;
-}
-
-/*
- * Record a quota operation for processing later on.
- * @trans: the transaction we are adding the delayed op to.
- * @fs_info: the fs_info for this fs.
- * @ref_root: the root of the reference we are acting on,
- * @bytenr: the bytenr we are acting on.
- * @num_bytes: the number of bytes in the reference.
- * @type: the type of operation this is.
- * @mod_seq: do we need to get a sequence number for looking up roots.
- *
- * We just add it to our trans qgroup_ref_list and carry on and process these
- * operations in order at some later point. If the reference root isn't a fs
- * root then we don't bother with doing anything.
- *
- * MUST BE HOLDING THE REF LOCK.
- */
-int btrfs_qgroup_record_ref(struct btrfs_trans_handle *trans,
- struct btrfs_fs_info *fs_info, u64 ref_root,
- u64 bytenr, u64 num_bytes,
- enum btrfs_qgroup_operation_type type, int mod_seq)
-{
- struct btrfs_qgroup_operation *oper;
- int ret;
-
- if (!is_fstree(ref_root) || !fs_info->quota_enabled)
- return 0;
-
- oper = kmalloc(sizeof(*oper), GFP_NOFS);
- if (!oper)
- return -ENOMEM;
-
- oper->ref_root = ref_root;
- oper->bytenr = bytenr;
- oper->num_bytes = num_bytes;
- oper->type = type;
- oper->seq = atomic_inc_return(&fs_info->qgroup_op_seq);
- INIT_LIST_HEAD(&oper->elem.list);
- oper->elem.seq = 0;
-
- trace_btrfs_qgroup_record_ref(oper);
-
- if (type == BTRFS_QGROUP_OPER_SUB_SUBTREE) {
- /*
- * If any operation for this bytenr/ref_root combo
- * exists, then we know it's not exclusively owned and
- * shouldn't be queued up.
- *
- * This also catches the case where we have a cloned
- * extent that gets queued up multiple times during
- * drop snapshot.
- */
- if (qgroup_oper_exists(fs_info, oper)) {
- kfree(oper);
- return 0;
- }
- }
-
- ret = insert_qgroup_oper(fs_info, oper);
- if (ret) {
- /* Shouldn't happen so have an assert for developers */
- ASSERT(0);
- kfree(oper);
- return ret;
+ else if (bytenr > entry->bytenr)
+ p = &(*p)->rb_right;
+ else
+ return entry;
}
- list_add_tail(&oper->list, &trans->qgroup_ref_list);
-
- if (mod_seq)
- btrfs_get_tree_mod_seq(fs_info, &oper->elem);
- return 0;
-}
-
-static int qgroup_excl_accounting(struct btrfs_fs_info *fs_info,
- struct btrfs_qgroup_operation *oper)
-{
- struct ulist *tmp;
- int sign = 0;
- int ret = 0;
-
- tmp = ulist_alloc(GFP_NOFS);
- if (!tmp)
- return -ENOMEM;
-
- spin_lock(&fs_info->qgroup_lock);
- if (!fs_info->quota_root)
- goto out;
-
- switch (oper->type) {
- case BTRFS_QGROUP_OPER_ADD_EXCL:
- sign = 1;
- break;
- case BTRFS_QGROUP_OPER_SUB_EXCL:
- sign = -1;
- break;
- default:
- ASSERT(0);
- }
- ret = __qgroup_excl_accounting(fs_info, tmp, oper->ref_root,
- oper->num_bytes, sign);
-out:
- spin_unlock(&fs_info->qgroup_lock);
- ulist_free(tmp);
- return ret;
+ rb_link_node(&record->node, parent_node, p);
+ rb_insert_color(&record->node, &delayed_refs->dirty_extent_root);
+ return NULL;
}
+#define UPDATE_NEW 0
+#define UPDATE_OLD 1
/*
- * Walk all of the roots that pointed to our bytenr and adjust their refcnts as
- * properly.
+ * Walk all of the roots that points to the bytenr and adjust their refcnts.
*/
-static int qgroup_calc_old_refcnt(struct btrfs_fs_info *fs_info,
- u64 root_to_skip, struct ulist *tmp,
- struct ulist *roots, struct ulist *qgroups,
- u64 seq, int *old_roots, int rescan)
+static int qgroup_update_refcnt(struct btrfs_fs_info *fs_info,
+ struct ulist *roots, struct ulist *tmp,
+ struct ulist *qgroups, u64 seq, int update_old)
{
struct ulist_node *unode;
struct ulist_iterator uiter;
struct ulist_node *tmp_unode;
struct ulist_iterator tmp_uiter;
struct btrfs_qgroup *qg;
- int ret;
+ int ret = 0;
+ if (!roots)
+ return 0;
ULIST_ITER_INIT(&uiter);
while ((unode = ulist_next(roots, &uiter))) {
- /* We don't count our current root here */
- if (unode->val == root_to_skip)
- continue;
qg = find_qgroup_rb(fs_info, unode->val);
if (!qg)
continue;
- /*
- * We could have a pending removal of this same ref so we may
- * not have actually found our ref root when doing
- * btrfs_find_all_roots, so we need to keep track of how many
- * old roots we find in case we removed ours and added a
- * different one at the same time. I don't think this could
- * happen in practice but that sort of thinking leads to pain
- * and suffering and to the dark side.
- */
- (*old_roots)++;
ulist_reinit(tmp);
ret = ulist_add(qgroups, qg->qgroupid, ptr_to_u64(qg),
@@ -1603,29 +1518,10 @@ static int qgroup_calc_old_refcnt(struct btrfs_fs_info *fs_info,
struct btrfs_qgroup_list *glist;
qg = u64_to_ptr(tmp_unode->aux);
- /*
- * We use this sequence number to keep from having to
- * run the whole list and 0 out the refcnt every time.
- * We basically use sequnce as the known 0 count and
- * then add 1 everytime we see a qgroup. This is how we
- * get how many of the roots actually point up to the
- * upper level qgroups in order to determine exclusive
- * counts.
- *
- * For rescan we want to set old_refcnt to seq so our
- * exclusive calculations end up correct.
- */
- if (rescan)
- qg->old_refcnt = seq;
- else if (qg->old_refcnt < seq)
- qg->old_refcnt = seq + 1;
+ if (update_old)
+ btrfs_qgroup_update_old_refcnt(qg, seq, 1);
else
- qg->old_refcnt++;
-
- if (qg->new_refcnt < seq)
- qg->new_refcnt = seq + 1;
- else
- qg->new_refcnt++;
+ btrfs_qgroup_update_new_refcnt(qg, seq, 1);
list_for_each_entry(glist, &qg->groups, next_group) {
ret = ulist_add(qgroups, glist->group->qgroupid,
ptr_to_u64(glist->group),
@@ -1644,161 +1540,46 @@ static int qgroup_calc_old_refcnt(struct btrfs_fs_info *fs_info,
}
/*
- * We need to walk forward in our operation tree and account for any roots that
- * were deleted after we made this operation.
- */
-static int qgroup_account_deleted_refs(struct btrfs_fs_info *fs_info,
- struct btrfs_qgroup_operation *oper,
- struct ulist *tmp,
- struct ulist *qgroups, u64 seq,
- int *old_roots)
-{
- struct ulist_node *unode;
- struct ulist_iterator uiter;
- struct btrfs_qgroup *qg;
- struct btrfs_qgroup_operation *tmp_oper;
- struct rb_node *n;
- int ret;
-
- ulist_reinit(tmp);
-
- /*
- * We only walk forward in the tree since we're only interested in
- * removals that happened _after_ our operation.
- */
- spin_lock(&fs_info->qgroup_op_lock);
- n = rb_next(&oper->n);
- spin_unlock(&fs_info->qgroup_op_lock);
- if (!n)
- return 0;
- tmp_oper = rb_entry(n, struct btrfs_qgroup_operation, n);
- while (tmp_oper->bytenr == oper->bytenr) {
- /*
- * If it's not a removal we don't care, additions work out
- * properly with our refcnt tracking.
- */
- if (tmp_oper->type != BTRFS_QGROUP_OPER_SUB_SHARED &&
- tmp_oper->type != BTRFS_QGROUP_OPER_SUB_EXCL)
- goto next;
- qg = find_qgroup_rb(fs_info, tmp_oper->ref_root);
- if (!qg)
- goto next;
- ret = ulist_add(qgroups, qg->qgroupid, ptr_to_u64(qg),
- GFP_ATOMIC);
- if (ret) {
- if (ret < 0)
- return ret;
- /*
- * We only want to increase old_roots if this qgroup is
- * not already in the list of qgroups. If it is already
- * there then that means it must have been re-added or
- * the delete will be discarded because we had an
- * existing ref that we haven't looked up yet. In this
- * case we don't want to increase old_roots. So if ret
- * == 1 then we know that this is the first time we've
- * seen this qgroup and we can bump the old_roots.
- */
- (*old_roots)++;
- ret = ulist_add(tmp, qg->qgroupid, ptr_to_u64(qg),
- GFP_ATOMIC);
- if (ret < 0)
- return ret;
- }
-next:
- spin_lock(&fs_info->qgroup_op_lock);
- n = rb_next(&tmp_oper->n);
- spin_unlock(&fs_info->qgroup_op_lock);
- if (!n)
- break;
- tmp_oper = rb_entry(n, struct btrfs_qgroup_operation, n);
- }
-
- /* Ok now process the qgroups we found */
- ULIST_ITER_INIT(&uiter);
- while ((unode = ulist_next(tmp, &uiter))) {
- struct btrfs_qgroup_list *glist;
-
- qg = u64_to_ptr(unode->aux);
- if (qg->old_refcnt < seq)
- qg->old_refcnt = seq + 1;
- else
- qg->old_refcnt++;
- if (qg->new_refcnt < seq)
- qg->new_refcnt = seq + 1;
- else
- qg->new_refcnt++;
- list_for_each_entry(glist, &qg->groups, next_group) {
- ret = ulist_add(qgroups, glist->group->qgroupid,
- ptr_to_u64(glist->group), GFP_ATOMIC);
- if (ret < 0)
- return ret;
- ret = ulist_add(tmp, glist->group->qgroupid,
- ptr_to_u64(glist->group), GFP_ATOMIC);
- if (ret < 0)
- return ret;
- }
- }
- return 0;
-}
-
-/* Add refcnt for the newly added reference. */
-static int qgroup_calc_new_refcnt(struct btrfs_fs_info *fs_info,
- struct btrfs_qgroup_operation *oper,
- struct btrfs_qgroup *qgroup,
- struct ulist *tmp, struct ulist *qgroups,
- u64 seq)
-{
- struct ulist_node *unode;
- struct ulist_iterator uiter;
- struct btrfs_qgroup *qg;
- int ret;
-
- ulist_reinit(tmp);
- ret = ulist_add(qgroups, qgroup->qgroupid, ptr_to_u64(qgroup),
- GFP_ATOMIC);
- if (ret < 0)
- return ret;
- ret = ulist_add(tmp, qgroup->qgroupid, ptr_to_u64(qgroup),
- GFP_ATOMIC);
- if (ret < 0)
- return ret;
- ULIST_ITER_INIT(&uiter);
- while ((unode = ulist_next(tmp, &uiter))) {
- struct btrfs_qgroup_list *glist;
-
- qg = u64_to_ptr(unode->aux);
- if (oper->type == BTRFS_QGROUP_OPER_ADD_SHARED) {
- if (qg->new_refcnt < seq)
- qg->new_refcnt = seq + 1;
- else
- qg->new_refcnt++;
- } else {
- if (qg->old_refcnt < seq)
- qg->old_refcnt = seq + 1;
- else
- qg->old_refcnt++;
- }
- list_for_each_entry(glist, &qg->groups, next_group) {
- ret = ulist_add(tmp, glist->group->qgroupid,
- ptr_to_u64(glist->group), GFP_ATOMIC);
- if (ret < 0)
- return ret;
- ret = ulist_add(qgroups, glist->group->qgroupid,
- ptr_to_u64(glist->group), GFP_ATOMIC);
- if (ret < 0)
- return ret;
- }
- }
- return 0;
-}
-
-/*
- * This adjusts the counters for all referenced qgroups if need be.
+ * Update qgroup rfer/excl counters.
+ * Rfer update is easy, codes can explain themselves.
+ *
+ * Excl update is tricky, the update is split into 2 part.
+ * Part 1: Possible exclusive <-> sharing detect:
+ * | A | !A |
+ * -------------------------------------
+ * B | * | - |
+ * -------------------------------------
+ * !B | + | ** |
+ * -------------------------------------
+ *
+ * Conditions:
+ * A: cur_old_roots < nr_old_roots (not exclusive before)
+ * !A: cur_old_roots == nr_old_roots (possible exclusive before)
+ * B: cur_new_roots < nr_new_roots (not exclusive now)
+ * !B: cur_new_roots == nr_new_roots (possible exclsuive now)
+ *
+ * Results:
+ * +: Possible sharing -> exclusive -: Possible exclusive -> sharing
+ * *: Definitely not changed. **: Possible unchanged.
+ *
+ * For !A and !B condition, the exception is cur_old/new_roots == 0 case.
+ *
+ * To make the logic clear, we first use condition A and B to split
+ * combination into 4 results.
+ *
+ * Then, for result "+" and "-", check old/new_roots == 0 case, as in them
+ * only on variant maybe 0.
+ *
+ * Lastly, check result **, since there are 2 variants maybe 0, split them
+ * again(2x2).
+ * But this time we don't need to consider other things, the codes and logic
+ * is easy to understand now.
*/
-static int qgroup_adjust_counters(struct btrfs_fs_info *fs_info,
- u64 root_to_skip, u64 num_bytes,
- struct ulist *qgroups, u64 seq,
- int old_roots, int new_roots, int rescan)
+static int qgroup_update_counters(struct btrfs_fs_info *fs_info,
+ struct ulist *qgroups,
+ u64 nr_old_roots,
+ u64 nr_new_roots,
+ u64 num_bytes, u64 seq)
{
struct ulist_node *unode;
struct ulist_iterator uiter;
@@ -1810,57 +1591,68 @@ static int qgroup_adjust_counters(struct btrfs_fs_info *fs_info,
bool dirty = false;
qg = u64_to_ptr(unode->aux);
- /*
- * Wasn't referenced before but is now, add to the reference
- * counters.
- */
- if (qg->old_refcnt <= seq && qg->new_refcnt > seq) {
+ cur_old_count = btrfs_qgroup_get_old_refcnt(qg, seq);
+ cur_new_count = btrfs_qgroup_get_new_refcnt(qg, seq);
+
+ /* Rfer update part */
+ if (cur_old_count == 0 && cur_new_count > 0) {
qg->rfer += num_bytes;
qg->rfer_cmpr += num_bytes;
dirty = true;
}
-
- /*
- * Was referenced before but isn't now, subtract from the
- * reference counters.
- */
- if (qg->old_refcnt > seq && qg->new_refcnt <= seq) {
+ if (cur_old_count > 0 && cur_new_count == 0) {
qg->rfer -= num_bytes;
qg->rfer_cmpr -= num_bytes;
dirty = true;
}
- if (qg->old_refcnt < seq)
- cur_old_count = 0;
- else
- cur_old_count = qg->old_refcnt - seq;
- if (qg->new_refcnt < seq)
- cur_new_count = 0;
- else
- cur_new_count = qg->new_refcnt - seq;
+ /* Excl update part */
+ /* Exclusive/none -> shared case */
+ if (cur_old_count == nr_old_roots &&
+ cur_new_count < nr_new_roots) {
+ /* Exclusive -> shared */
+ if (cur_old_count != 0) {
+ qg->excl -= num_bytes;
+ qg->excl_cmpr -= num_bytes;
+ dirty = true;
+ }
+ }
- /*
- * If our refcount was the same as the roots previously but our
- * new count isn't the same as the number of roots now then we
- * went from having a exclusive reference on this range to not.
- */
- if (old_roots && cur_old_count == old_roots &&
- (cur_new_count != new_roots || new_roots == 0)) {
- WARN_ON(cur_new_count != new_roots && new_roots == 0);
- qg->excl -= num_bytes;
- qg->excl_cmpr -= num_bytes;
- dirty = true;
+ /* Shared -> exclusive/none case */
+ if (cur_old_count < nr_old_roots &&
+ cur_new_count == nr_new_roots) {
+ /* Shared->exclusive */
+ if (cur_new_count != 0) {
+ qg->excl += num_bytes;
+ qg->excl_cmpr += num_bytes;
+ dirty = true;
+ }
}
- /*
- * If we didn't reference all the roots before but now we do we
- * have an exclusive reference to this range.
- */
- if ((!old_roots || (old_roots && cur_old_count != old_roots))
- && cur_new_count == new_roots) {
- qg->excl += num_bytes;
- qg->excl_cmpr += num_bytes;
- dirty = true;
+ /* Exclusive/none -> exclusive/none case */
+ if (cur_old_count == nr_old_roots &&
+ cur_new_count == nr_new_roots) {
+ if (cur_old_count == 0) {
+ /* None -> exclusive/none */
+
+ if (cur_new_count != 0) {
+ /* None -> exclusive */
+ qg->excl += num_bytes;
+ qg->excl_cmpr += num_bytes;
+ dirty = true;
+ }
+ /* None -> none, nothing changed */
+ } else {
+ /* Exclusive -> exclusive/none */
+
+ if (cur_new_count == 0) {
+ /* Exclusive -> none */
+ qg->excl -= num_bytes;
+ qg->excl_cmpr -= num_bytes;
+ dirty = true;
+ }
+ /* Exclusive -> exclusive, nothing changed */
+ }
}
if (dirty)
@@ -1869,364 +1661,122 @@ static int qgroup_adjust_counters(struct btrfs_fs_info *fs_info,
return 0;
}
-/*
- * If we removed a data extent and there were other references for that bytenr
- * then we need to lookup all referenced roots to make sure we still don't
- * reference this bytenr. If we do then we can just discard this operation.
- */
-static int check_existing_refs(struct btrfs_trans_handle *trans,
- struct btrfs_fs_info *fs_info,
- struct btrfs_qgroup_operation *oper)
-{
- struct ulist *roots = NULL;
- struct ulist_node *unode;
- struct ulist_iterator uiter;
- int ret = 0;
-
- ret = btrfs_find_all_roots(trans, fs_info, oper->bytenr,
- oper->elem.seq, &roots);
- if (ret < 0)
- return ret;
- ret = 0;
-
- ULIST_ITER_INIT(&uiter);
- while ((unode = ulist_next(roots, &uiter))) {
- if (unode->val == oper->ref_root) {
- ret = 1;
- break;
- }
- }
- ulist_free(roots);
- btrfs_put_tree_mod_seq(fs_info, &oper->elem);
-
- return ret;
-}
-
-/*
- * If we share a reference across multiple roots then we may need to adjust
- * various qgroups referenced and exclusive counters. The basic premise is this
- *
- * 1) We have seq to represent a 0 count. Instead of looping through all of the
- * qgroups and resetting their refcount to 0 we just constantly bump this
- * sequence number to act as the base reference count. This means that if
- * anybody is equal to or below this sequence they were never referenced. We
- * jack this sequence up by the number of roots we found each time in order to
- * make sure we don't have any overlap.
- *
- * 2) We first search all the roots that reference the area _except_ the root
- * we're acting on currently. This makes up the old_refcnt of all the qgroups
- * before.
- *
- * 3) We walk all of the qgroups referenced by the root we are currently acting
- * on, and will either adjust old_refcnt in the case of a removal or the
- * new_refcnt in the case of an addition.
- *
- * 4) Finally we walk all the qgroups that are referenced by this range
- * including the root we are acting on currently. We will adjust the counters
- * based on the number of roots we had and will have after this operation.
- *
- * Take this example as an illustration
- *
- * [qgroup 1/0]
- * / | \
- * [qg 0/0] [qg 0/1] [qg 0/2]
- * \ | /
- * [ extent ]
- *
- * Say we are adding a reference that is covered by qg 0/0. The first step
- * would give a refcnt of 1 to qg 0/1 and 0/2 and a refcnt of 2 to qg 1/0 with
- * old_roots being 2. Because it is adding new_roots will be 1. We then go
- * through qg 0/0 which will get the new_refcnt set to 1 and add 1 to qg 1/0's
- * new_refcnt, bringing it to 3. We then walk through all of the qgroups, we
- * notice that the old refcnt for qg 0/0 < the new refcnt, so we added a
- * reference and thus must add the size to the referenced bytes. Everything
- * else is the same so nothing else changes.
- */
-static int qgroup_shared_accounting(struct btrfs_trans_handle *trans,
- struct btrfs_fs_info *fs_info,
- struct btrfs_qgroup_operation *oper)
+int
+btrfs_qgroup_account_extent(struct btrfs_trans_handle *trans,
+ struct btrfs_fs_info *fs_info,
+ u64 bytenr, u64 num_bytes,
+ struct ulist *old_roots, struct ulist *new_roots)
{
- struct ulist *roots = NULL;
- struct ulist *qgroups, *tmp;
- struct btrfs_qgroup *qgroup;
- struct seq_list elem = SEQ_LIST_INIT(elem);
+ struct ulist *qgroups = NULL;
+ struct ulist *tmp = NULL;
u64 seq;
- int old_roots = 0;
- int new_roots = 0;
+ u64 nr_new_roots = 0;
+ u64 nr_old_roots = 0;
int ret = 0;
- if (oper->elem.seq) {
- ret = check_existing_refs(trans, fs_info, oper);
- if (ret < 0)
- return ret;
- if (ret)
- return 0;
- }
+ if (new_roots)
+ nr_new_roots = new_roots->nnodes;
+ if (old_roots)
+ nr_old_roots = old_roots->nnodes;
- qgroups = ulist_alloc(GFP_NOFS);
- if (!qgroups)
- return -ENOMEM;
+ if (!fs_info->quota_enabled)
+ goto out_free;
+ BUG_ON(!fs_info->quota_root);
+ qgroups = ulist_alloc(GFP_NOFS);
+ if (!qgroups) {
+ ret = -ENOMEM;
+ goto out_free;
+ }
tmp = ulist_alloc(GFP_NOFS);
if (!tmp) {
- ulist_free(qgroups);
- return -ENOMEM;
+ ret = -ENOMEM;
+ goto out_free;
}
- btrfs_get_tree_mod_seq(fs_info, &elem);
- ret = btrfs_find_all_roots(trans, fs_info, oper->bytenr, elem.seq,
- &roots);
- btrfs_put_tree_mod_seq(fs_info, &elem);
- if (ret < 0) {
- ulist_free(qgroups);
- ulist_free(tmp);
- return ret;
+ mutex_lock(&fs_info->qgroup_rescan_lock);
+ if (fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_RESCAN) {
+ if (fs_info->qgroup_rescan_progress.objectid <= bytenr) {
+ mutex_unlock(&fs_info->qgroup_rescan_lock);
+ ret = 0;
+ goto out_free;
+ }
}
+ mutex_unlock(&fs_info->qgroup_rescan_lock);
+
spin_lock(&fs_info->qgroup_lock);
- qgroup = find_qgroup_rb(fs_info, oper->ref_root);
- if (!qgroup)
- goto out;
seq = fs_info->qgroup_seq;
- /*
- * So roots is the list of all the roots currently pointing at the
- * bytenr, including the ref we are adding if we are adding, or not if
- * we are removing a ref. So we pass in the ref_root to skip that root
- * in our calculations. We set old_refnct and new_refcnt cause who the
- * hell knows what everything looked like before, and it doesn't matter
- * except...
- */
- ret = qgroup_calc_old_refcnt(fs_info, oper->ref_root, tmp, roots, qgroups,
- seq, &old_roots, 0);
- if (ret < 0)
- goto out;
-
- /*
- * Now adjust the refcounts of the qgroups that care about this
- * reference, either the old_count in the case of removal or new_count
- * in the case of an addition.
- */
- ret = qgroup_calc_new_refcnt(fs_info, oper, qgroup, tmp, qgroups,
- seq);
+ /* Update old refcnts using old_roots */
+ ret = qgroup_update_refcnt(fs_info, old_roots, tmp, qgroups, seq,
+ UPDATE_OLD);
if (ret < 0)
goto out;
- /*
- * ...in the case of removals. If we had a removal before we got around
- * to processing this operation then we need to find that guy and count
- * his references as if they really existed so we don't end up screwing
- * up the exclusive counts. Then whenever we go to process the delete
- * everything will be grand and we can account for whatever exclusive
- * changes need to be made there. We also have to pass in old_roots so
- * we have an accurate count of the roots as it pertains to this
- * operations view of the world.
- */
- ret = qgroup_account_deleted_refs(fs_info, oper, tmp, qgroups, seq,
- &old_roots);
+ /* Update new refcnts using new_roots */
+ ret = qgroup_update_refcnt(fs_info, new_roots, tmp, qgroups, seq,
+ UPDATE_NEW);
if (ret < 0)
goto out;
- /*
- * We are adding our root, need to adjust up the number of roots,
- * otherwise old_roots is the number of roots we want.
- */
- if (oper->type == BTRFS_QGROUP_OPER_ADD_SHARED) {
- new_roots = old_roots + 1;
- } else {
- new_roots = old_roots;
- old_roots++;
- }
- fs_info->qgroup_seq += old_roots + 1;
-
+ qgroup_update_counters(fs_info, qgroups, nr_old_roots, nr_new_roots,
+ num_bytes, seq);
/*
- * And now the magic happens, bless Arne for having a pretty elegant
- * solution for this.
+ * Bump qgroup_seq to avoid seq overlap
*/
- qgroup_adjust_counters(fs_info, oper->ref_root, oper->num_bytes,
- qgroups, seq, old_roots, new_roots, 0);
+ fs_info->qgroup_seq += max(nr_old_roots, nr_new_roots) + 1;
out:
spin_unlock(&fs_info->qgroup_lock);
- ulist_free(qgroups);
- ulist_free(roots);
+out_free:
ulist_free(tmp);
+ ulist_free(qgroups);
+ ulist_free(old_roots);
+ ulist_free(new_roots);
return ret;
}
-/*
- * Process a reference to a shared subtree. This type of operation is
- * queued during snapshot removal when we encounter extents which are
- * shared between more than one root.
- */
-static int qgroup_subtree_accounting(struct btrfs_trans_handle *trans,
- struct btrfs_fs_info *fs_info,
- struct btrfs_qgroup_operation *oper)
-{
- struct ulist *roots = NULL;
- struct ulist_node *unode;
- struct ulist_iterator uiter;
- struct btrfs_qgroup_list *glist;
- struct ulist *parents;
- int ret = 0;
- int err;
- struct btrfs_qgroup *qg;
- u64 root_obj = 0;
- struct seq_list elem = SEQ_LIST_INIT(elem);
-
- parents = ulist_alloc(GFP_NOFS);
- if (!parents)
- return -ENOMEM;
-
- btrfs_get_tree_mod_seq(fs_info, &elem);
- ret = btrfs_find_all_roots(trans, fs_info, oper->bytenr,
- elem.seq, &roots);
- btrfs_put_tree_mod_seq(fs_info, &elem);
- if (ret < 0)
- goto out;
-
- if (roots->nnodes != 1)
- goto out;
-
- ULIST_ITER_INIT(&uiter);
- unode = ulist_next(roots, &uiter); /* Only want 1 so no need to loop */
- /*
- * If we find our ref root then that means all refs
- * this extent has to the root have not yet been
- * deleted. In that case, we do nothing and let the
- * last ref for this bytenr drive our update.
- *
- * This can happen for example if an extent is
- * referenced multiple times in a snapshot (clone,
- * etc). If we are in the middle of snapshot removal,
- * queued updates for such an extent will find the
- * root if we have not yet finished removing the
- * snapshot.
- */
- if (unode->val == oper->ref_root)
- goto out;
-
- root_obj = unode->val;
- BUG_ON(!root_obj);
-
- spin_lock(&fs_info->qgroup_lock);
- qg = find_qgroup_rb(fs_info, root_obj);
- if (!qg)
- goto out_unlock;
-
- qg->excl += oper->num_bytes;
- qg->excl_cmpr += oper->num_bytes;
- qgroup_dirty(fs_info, qg);
-
- /*
- * Adjust counts for parent groups. First we find all
- * parents, then in the 2nd loop we do the adjustment
- * while adding parents of the parents to our ulist.
- */
- list_for_each_entry(glist, &qg->groups, next_group) {
- err = ulist_add(parents, glist->group->qgroupid,
- ptr_to_u64(glist->group), GFP_ATOMIC);
- if (err < 0) {
- ret = err;
- goto out_unlock;
- }
- }
-
- ULIST_ITER_INIT(&uiter);
- while ((unode = ulist_next(parents, &uiter))) {
- qg = u64_to_ptr(unode->aux);
- qg->excl += oper->num_bytes;
- qg->excl_cmpr += oper->num_bytes;
- qgroup_dirty(fs_info, qg);
-
- /* Add any parents of the parents */
- list_for_each_entry(glist, &qg->groups, next_group) {
- err = ulist_add(parents, glist->group->qgroupid,
- ptr_to_u64(glist->group), GFP_ATOMIC);
- if (err < 0) {
- ret = err;
- goto out_unlock;
- }
- }
- }
-
-out_unlock:
- spin_unlock(&fs_info->qgroup_lock);
-
-out:
- ulist_free(roots);
- ulist_free(parents);
- return ret;
-}
-
-/*
- * btrfs_qgroup_account_ref is called for every ref that is added to or deleted
- * from the fs. First, all roots referencing the extent are searched, and
- * then the space is accounted accordingly to the different roots. The
- * accounting algorithm works in 3 steps documented inline.
- */
-static int btrfs_qgroup_account(struct btrfs_trans_handle *trans,
- struct btrfs_fs_info *fs_info,
- struct btrfs_qgroup_operation *oper)
+int btrfs_qgroup_account_extents(struct btrfs_trans_handle *trans,
+ struct btrfs_fs_info *fs_info)
{
+ struct btrfs_qgroup_extent_record *record;
+ struct btrfs_delayed_ref_root *delayed_refs;
+ struct ulist *new_roots = NULL;
+ struct rb_node *node;
+ u64 qgroup_to_skip;
int ret = 0;
- if (!fs_info->quota_enabled)
- return 0;
-
- BUG_ON(!fs_info->quota_root);
+ delayed_refs = &trans->transaction->delayed_refs;
+ qgroup_to_skip = delayed_refs->qgroup_to_skip;
+ while ((node = rb_first(&delayed_refs->dirty_extent_root))) {
+ record = rb_entry(node, struct btrfs_qgroup_extent_record,
+ node);
- mutex_lock(&fs_info->qgroup_rescan_lock);
- if (fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_RESCAN) {
- if (fs_info->qgroup_rescan_progress.objectid <= oper->bytenr) {
- mutex_unlock(&fs_info->qgroup_rescan_lock);
- return 0;
+ if (!ret) {
+ /*
+ * Use (u64)-1 as time_seq to do special search, which
+ * doesn't lock tree or delayed_refs and search current
+ * root. It's safe inside commit_transaction().
+ */
+ ret = btrfs_find_all_roots(trans, fs_info,
+ record->bytenr, (u64)-1, &new_roots);
+ if (ret < 0)
+ goto cleanup;
+ if (qgroup_to_skip)
+ ulist_del(new_roots, qgroup_to_skip, 0);
+ ret = btrfs_qgroup_account_extent(trans, fs_info,
+ record->bytenr, record->num_bytes,
+ record->old_roots, new_roots);
+ record->old_roots = NULL;
+ new_roots = NULL;
}
- }
- mutex_unlock(&fs_info->qgroup_rescan_lock);
+cleanup:
+ ulist_free(record->old_roots);
+ ulist_free(new_roots);
+ new_roots = NULL;
+ rb_erase(node, &delayed_refs->dirty_extent_root);
+ kfree(record);
- ASSERT(is_fstree(oper->ref_root));
-
- trace_btrfs_qgroup_account(oper);
-
- switch (oper->type) {
- case BTRFS_QGROUP_OPER_ADD_EXCL:
- case BTRFS_QGROUP_OPER_SUB_EXCL:
- ret = qgroup_excl_accounting(fs_info, oper);
- break;
- case BTRFS_QGROUP_OPER_ADD_SHARED:
- case BTRFS_QGROUP_OPER_SUB_SHARED:
- ret = qgroup_shared_accounting(trans, fs_info, oper);
- break;
- case BTRFS_QGROUP_OPER_SUB_SUBTREE:
- ret = qgroup_subtree_accounting(trans, fs_info, oper);
- break;
- default:
- ASSERT(0);
- }
- return ret;
-}
-
-/*
- * Needs to be called everytime we run delayed refs, even if there is an error
- * in order to cleanup outstanding operations.
- */
-int btrfs_delayed_qgroup_accounting(struct btrfs_trans_handle *trans,
- struct btrfs_fs_info *fs_info)
-{
- struct btrfs_qgroup_operation *oper;
- int ret = 0;
-
- while (!list_empty(&trans->qgroup_ref_list)) {
- oper = list_first_entry(&trans->qgroup_ref_list,
- struct btrfs_qgroup_operation, list);
- list_del_init(&oper->list);
- if (!ret || !trans->aborted)
- ret = btrfs_qgroup_account(trans, fs_info, oper);
- spin_lock(&fs_info->qgroup_op_lock);
- rb_erase(&oper->n, &fs_info->qgroup_op_tree);
- spin_unlock(&fs_info->qgroup_op_lock);
- btrfs_put_tree_mod_seq(fs_info, &oper->elem);
- kfree(oper);
}
return ret;
}
@@ -2484,7 +2034,7 @@ out:
return ret;
}
-int btrfs_qgroup_reserve(struct btrfs_root *root, u64 num_bytes)
+static int qgroup_reserve(struct btrfs_root *root, u64 num_bytes)
{
struct btrfs_root *quota_root;
struct btrfs_qgroup *qgroup;
@@ -2565,14 +2115,13 @@ out:
return ret;
}
-void btrfs_qgroup_free(struct btrfs_root *root, u64 num_bytes)
+void btrfs_qgroup_free_refroot(struct btrfs_fs_info *fs_info,
+ u64 ref_root, u64 num_bytes)
{
struct btrfs_root *quota_root;
struct btrfs_qgroup *qgroup;
- struct btrfs_fs_info *fs_info = root->fs_info;
struct ulist_node *unode;
struct ulist_iterator uiter;
- u64 ref_root = root->root_key.objectid;
int ret = 0;
if (!is_fstree(ref_root))
@@ -2618,6 +2167,11 @@ out:
spin_unlock(&fs_info->qgroup_lock);
}
+static inline void qgroup_free(struct btrfs_root *root, u64 num_bytes)
+{
+ return btrfs_qgroup_free_refroot(root->fs_info, root->objectid,
+ num_bytes);
+}
void assert_qgroups_uptodate(struct btrfs_trans_handle *trans)
{
if (list_empty(&trans->qgroup_ref_list) && !trans->delayed_ref_elem.seq)
@@ -2637,19 +2191,16 @@ void assert_qgroups_uptodate(struct btrfs_trans_handle *trans)
*/
static int
qgroup_rescan_leaf(struct btrfs_fs_info *fs_info, struct btrfs_path *path,
- struct btrfs_trans_handle *trans, struct ulist *qgroups,
- struct ulist *tmp, struct extent_buffer *scratch_leaf)
+ struct btrfs_trans_handle *trans)
{
struct btrfs_key found;
+ struct extent_buffer *scratch_leaf = NULL;
struct ulist *roots = NULL;
struct seq_list tree_mod_seq_elem = SEQ_LIST_INIT(tree_mod_seq_elem);
u64 num_bytes;
- u64 seq;
- int new_roots;
int slot;
int ret;
- path->leave_spinning = 1;
mutex_lock(&fs_info->qgroup_rescan_lock);
ret = btrfs_search_slot_for_read(fs_info->extent_root,
&fs_info->qgroup_rescan_progress,
@@ -2680,7 +2231,15 @@ qgroup_rescan_leaf(struct btrfs_fs_info *fs_info, struct btrfs_path *path,
fs_info->qgroup_rescan_progress.objectid = found.objectid + 1;
btrfs_get_tree_mod_seq(fs_info, &tree_mod_seq_elem);
- memcpy(scratch_leaf, path->nodes[0], sizeof(*scratch_leaf));
+ scratch_leaf = btrfs_clone_extent_buffer(path->nodes[0]);
+ if (!scratch_leaf) {
+ ret = -ENOMEM;
+ mutex_unlock(&fs_info->qgroup_rescan_lock);
+ goto out;
+ }
+ extent_buffer_get(scratch_leaf);
+ btrfs_tree_read_lock(scratch_leaf);
+ btrfs_set_lock_blocking_rw(scratch_leaf, BTRFS_READ_LOCK);
slot = path->slots[0];
btrfs_release_path(path);
mutex_unlock(&fs_info->qgroup_rescan_lock);
@@ -2695,35 +2254,21 @@ qgroup_rescan_leaf(struct btrfs_fs_info *fs_info, struct btrfs_path *path,
else
num_bytes = found.offset;
- ulist_reinit(qgroups);
ret = btrfs_find_all_roots(NULL, fs_info, found.objectid, 0,
&roots);
if (ret < 0)
goto out;
- spin_lock(&fs_info->qgroup_lock);
- seq = fs_info->qgroup_seq;
- fs_info->qgroup_seq += roots->nnodes + 1; /* max refcnt */
-
- new_roots = 0;
- ret = qgroup_calc_old_refcnt(fs_info, 0, tmp, roots, qgroups,
- seq, &new_roots, 1);
- if (ret < 0) {
- spin_unlock(&fs_info->qgroup_lock);
- ulist_free(roots);
- goto out;
- }
-
- ret = qgroup_adjust_counters(fs_info, 0, num_bytes, qgroups,
- seq, 0, new_roots, 1);
- if (ret < 0) {
- spin_unlock(&fs_info->qgroup_lock);
- ulist_free(roots);
+ /* For rescan, just pass old_roots as NULL */
+ ret = btrfs_qgroup_account_extent(trans, fs_info,
+ found.objectid, num_bytes, NULL, roots);
+ if (ret < 0)
goto out;
- }
- spin_unlock(&fs_info->qgroup_lock);
- ulist_free(roots);
}
out:
+ if (scratch_leaf) {
+ btrfs_tree_read_unlock_blocking(scratch_leaf);
+ free_extent_buffer(scratch_leaf);
+ }
btrfs_put_tree_mod_seq(fs_info, &tree_mod_seq_elem);
return ret;
@@ -2735,26 +2280,15 @@ static void btrfs_qgroup_rescan_worker(struct btrfs_work *work)
qgroup_rescan_work);
struct btrfs_path *path;
struct btrfs_trans_handle *trans = NULL;
- struct ulist *tmp = NULL, *qgroups = NULL;
- struct extent_buffer *scratch_leaf = NULL;
int err = -ENOMEM;
int ret = 0;
path = btrfs_alloc_path();
if (!path)
goto out;
- qgroups = ulist_alloc(GFP_NOFS);
- if (!qgroups)
- goto out;
- tmp = ulist_alloc(GFP_NOFS);
- if (!tmp)
- goto out;
- scratch_leaf = kmalloc(sizeof(*scratch_leaf), GFP_NOFS);
- if (!scratch_leaf)
- goto out;
err = 0;
- while (!err) {
+ while (!err && !btrfs_fs_closing(fs_info)) {
trans = btrfs_start_transaction(fs_info->fs_root, 0);
if (IS_ERR(trans)) {
err = PTR_ERR(trans);
@@ -2763,8 +2297,7 @@ static void btrfs_qgroup_rescan_worker(struct btrfs_work *work)
if (!fs_info->quota_enabled) {
err = -EINTR;
} else {
- err = qgroup_rescan_leaf(fs_info, path, trans,
- qgroups, tmp, scratch_leaf);
+ err = qgroup_rescan_leaf(fs_info, path, trans);
}
if (err > 0)
btrfs_commit_transaction(trans, fs_info->fs_root);
@@ -2773,13 +2306,11 @@ static void btrfs_qgroup_rescan_worker(struct btrfs_work *work)
}
out:
- kfree(scratch_leaf);
- ulist_free(qgroups);
- ulist_free(tmp);
btrfs_free_path(path);
mutex_lock(&fs_info->qgroup_rescan_lock);
- fs_info->qgroup_flags &= ~BTRFS_QGROUP_STATUS_FLAG_RESCAN;
+ if (!btrfs_fs_closing(fs_info))
+ fs_info->qgroup_flags &= ~BTRFS_QGROUP_STATUS_FLAG_RESCAN;
if (err > 0 &&
fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT) {
@@ -2808,7 +2339,9 @@ out:
}
btrfs_end_transaction(trans, fs_info->quota_root);
- if (err >= 0) {
+ if (btrfs_fs_closing(fs_info)) {
+ btrfs_info(fs_info, "qgroup scan paused");
+ } else if (err >= 0) {
btrfs_info(fs_info, "qgroup scan completed%s",
err > 0 ? " (inconsistency flag cleared)" : "");
} else {
@@ -2856,12 +2389,11 @@ qgroup_rescan_init(struct btrfs_fs_info *fs_info, u64 progress_objectid,
memset(&fs_info->qgroup_rescan_progress, 0,
sizeof(fs_info->qgroup_rescan_progress));
fs_info->qgroup_rescan_progress.objectid = progress_objectid;
+ init_completion(&fs_info->qgroup_rescan_completion);
spin_unlock(&fs_info->qgroup_lock);
mutex_unlock(&fs_info->qgroup_rescan_lock);
- init_completion(&fs_info->qgroup_rescan_completion);
-
memset(&fs_info->qgroup_rescan_work, 0,
sizeof(fs_info->qgroup_rescan_work));
btrfs_init_work(&fs_info->qgroup_rescan_work,
@@ -2964,3 +2496,190 @@ btrfs_qgroup_rescan_resume(struct btrfs_fs_info *fs_info)
btrfs_queue_work(fs_info->qgroup_rescan_workers,
&fs_info->qgroup_rescan_work);
}
+
+/*
+ * Reserve qgroup space for range [start, start + len).
+ *
+ * This function will either reserve space from related qgroups or doing
+ * nothing if the range is already reserved.
+ *
+ * Return 0 for successful reserve
+ * Return <0 for error (including -EQUOT)
+ *
+ * NOTE: this function may sleep for memory allocation.
+ */
+int btrfs_qgroup_reserve_data(struct inode *inode, u64 start, u64 len)
+{
+ struct btrfs_root *root = BTRFS_I(inode)->root;
+ struct extent_changeset changeset;
+ struct ulist_node *unode;
+ struct ulist_iterator uiter;
+ int ret;
+
+ if (!root->fs_info->quota_enabled || !is_fstree(root->objectid) ||
+ len == 0)
+ return 0;
+
+ changeset.bytes_changed = 0;
+ changeset.range_changed = ulist_alloc(GFP_NOFS);
+ ret = set_record_extent_bits(&BTRFS_I(inode)->io_tree, start,
+ start + len -1, EXTENT_QGROUP_RESERVED, GFP_NOFS,
+ &changeset);
+ trace_btrfs_qgroup_reserve_data(inode, start, len,
+ changeset.bytes_changed,
+ QGROUP_RESERVE);
+ if (ret < 0)
+ goto cleanup;
+ ret = qgroup_reserve(root, changeset.bytes_changed);
+ if (ret < 0)
+ goto cleanup;
+
+ ulist_free(changeset.range_changed);
+ return ret;
+
+cleanup:
+ /* cleanup already reserved ranges */
+ ULIST_ITER_INIT(&uiter);
+ while ((unode = ulist_next(changeset.range_changed, &uiter)))
+ clear_extent_bit(&BTRFS_I(inode)->io_tree, unode->val,
+ unode->aux, EXTENT_QGROUP_RESERVED, 0, 0, NULL,
+ GFP_NOFS);
+ ulist_free(changeset.range_changed);
+ return ret;
+}
+
+static int __btrfs_qgroup_release_data(struct inode *inode, u64 start, u64 len,
+ int free)
+{
+ struct extent_changeset changeset;
+ int trace_op = QGROUP_RELEASE;
+ int ret;
+
+ changeset.bytes_changed = 0;
+ changeset.range_changed = ulist_alloc(GFP_NOFS);
+ if (!changeset.range_changed)
+ return -ENOMEM;
+
+ ret = clear_record_extent_bits(&BTRFS_I(inode)->io_tree, start,
+ start + len -1, EXTENT_QGROUP_RESERVED, GFP_NOFS,
+ &changeset);
+ if (ret < 0)
+ goto out;
+
+ if (free) {
+ qgroup_free(BTRFS_I(inode)->root, changeset.bytes_changed);
+ trace_op = QGROUP_FREE;
+ }
+ trace_btrfs_qgroup_release_data(inode, start, len,
+ changeset.bytes_changed, trace_op);
+out:
+ ulist_free(changeset.range_changed);
+ return ret;
+}
+
+/*
+ * Free a reserved space range from io_tree and related qgroups
+ *
+ * Should be called when a range of pages get invalidated before reaching disk.
+ * Or for error cleanup case.
+ *
+ * For data written to disk, use btrfs_qgroup_release_data().
+ *
+ * NOTE: This function may sleep for memory allocation.
+ */
+int btrfs_qgroup_free_data(struct inode *inode, u64 start, u64 len)
+{
+ return __btrfs_qgroup_release_data(inode, start, len, 1);
+}
+
+/*
+ * Release a reserved space range from io_tree only.
+ *
+ * Should be called when a range of pages get written to disk and corresponding
+ * FILE_EXTENT is inserted into corresponding root.
+ *
+ * Since new qgroup accounting framework will only update qgroup numbers at
+ * commit_transaction() time, its reserved space shouldn't be freed from
+ * related qgroups.
+ *
+ * But we should release the range from io_tree, to allow further write to be
+ * COWed.
+ *
+ * NOTE: This function may sleep for memory allocation.
+ */
+int btrfs_qgroup_release_data(struct inode *inode, u64 start, u64 len)
+{
+ return __btrfs_qgroup_release_data(inode, start, len, 0);
+}
+
+int btrfs_qgroup_reserve_meta(struct btrfs_root *root, int num_bytes)
+{
+ int ret;
+
+ if (!root->fs_info->quota_enabled || !is_fstree(root->objectid) ||
+ num_bytes == 0)
+ return 0;
+
+ BUG_ON(num_bytes != round_down(num_bytes, root->nodesize));
+ ret = qgroup_reserve(root, num_bytes);
+ if (ret < 0)
+ return ret;
+ atomic_add(num_bytes, &root->qgroup_meta_rsv);
+ return ret;
+}
+
+void btrfs_qgroup_free_meta_all(struct btrfs_root *root)
+{
+ int reserved;
+
+ if (!root->fs_info->quota_enabled || !is_fstree(root->objectid))
+ return;
+
+ reserved = atomic_xchg(&root->qgroup_meta_rsv, 0);
+ if (reserved == 0)
+ return;
+ qgroup_free(root, reserved);
+}
+
+void btrfs_qgroup_free_meta(struct btrfs_root *root, int num_bytes)
+{
+ if (!root->fs_info->quota_enabled || !is_fstree(root->objectid))
+ return;
+
+ BUG_ON(num_bytes != round_down(num_bytes, root->nodesize));
+ WARN_ON(atomic_read(&root->qgroup_meta_rsv) < num_bytes);
+ atomic_sub(num_bytes, &root->qgroup_meta_rsv);
+ qgroup_free(root, num_bytes);
+}
+
+/*
+ * Check qgroup reserved space leaking, normally at destory inode
+ * time
+ */
+void btrfs_qgroup_check_reserved_leak(struct inode *inode)
+{
+ struct extent_changeset changeset;
+ struct ulist_node *unode;
+ struct ulist_iterator iter;
+ int ret;
+
+ changeset.bytes_changed = 0;
+ changeset.range_changed = ulist_alloc(GFP_NOFS);
+ if (WARN_ON(!changeset.range_changed))
+ return;
+
+ ret = clear_record_extent_bits(&BTRFS_I(inode)->io_tree, 0, (u64)-1,
+ EXTENT_QGROUP_RESERVED, GFP_NOFS, &changeset);
+
+ WARN_ON(ret < 0);
+ if (WARN_ON(changeset.bytes_changed)) {
+ ULIST_ITER_INIT(&iter);
+ while ((unode = ulist_next(changeset.range_changed, &iter))) {
+ btrfs_warn(BTRFS_I(inode)->root->fs_info,
+ "leaking qgroup reserved space, ino: %lu, start: %llu, end: %llu",
+ inode->i_ino, unode->val, unode->aux);
+ }
+ qgroup_free(BTRFS_I(inode)->root, changeset.bytes_changed);
+ }
+ ulist_free(changeset.range_changed);
+}
diff --git a/kernel/fs/btrfs/qgroup.h b/kernel/fs/btrfs/qgroup.h
index c5242aa9a..ecb2c143e 100644
--- a/kernel/fs/btrfs/qgroup.h
+++ b/kernel/fs/btrfs/qgroup.h
@@ -19,45 +19,27 @@
#ifndef __BTRFS_QGROUP__
#define __BTRFS_QGROUP__
+#include "ulist.h"
+#include "delayed-ref.h"
+
/*
- * A description of the operations, all of these operations only happen when we
- * are adding the 1st reference for that subvolume in the case of adding space
- * or on the last reference delete in the case of subtraction. The only
- * exception is the last one, which is added for confusion.
- *
- * BTRFS_QGROUP_OPER_ADD_EXCL: adding bytes where this subvolume is the only
- * one pointing at the bytes we are adding. This is called on the first
- * allocation.
- *
- * BTRFS_QGROUP_OPER_ADD_SHARED: adding bytes where this bytenr is going to be
- * shared between subvols. This is called on the creation of a ref that already
- * has refs from a different subvolume, so basically reflink.
- *
- * BTRFS_QGROUP_OPER_SUB_EXCL: removing bytes where this subvolume is the only
- * one referencing the range.
- *
- * BTRFS_QGROUP_OPER_SUB_SHARED: removing bytes where this subvolume shares with
- * refs with other subvolumes.
+ * Record a dirty extent, and info qgroup to update quota on it
+ * TODO: Use kmem cache to alloc it.
*/
-enum btrfs_qgroup_operation_type {
- BTRFS_QGROUP_OPER_ADD_EXCL,
- BTRFS_QGROUP_OPER_ADD_SHARED,
- BTRFS_QGROUP_OPER_SUB_EXCL,
- BTRFS_QGROUP_OPER_SUB_SHARED,
- BTRFS_QGROUP_OPER_SUB_SUBTREE,
-};
-
-struct btrfs_qgroup_operation {
- u64 ref_root;
+struct btrfs_qgroup_extent_record {
+ struct rb_node node;
u64 bytenr;
u64 num_bytes;
- u64 seq;
- enum btrfs_qgroup_operation_type type;
- struct seq_list elem;
- struct rb_node n;
- struct list_head list;
+ struct ulist *old_roots;
};
+/*
+ * For qgroup event trace points only
+ */
+#define QGROUP_RESERVE (1<<0)
+#define QGROUP_RELEASE (1<<1)
+#define QGROUP_FREE (1<<2)
+
int btrfs_quota_enable(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info);
int btrfs_quota_disable(struct btrfs_trans_handle *trans,
@@ -79,24 +61,35 @@ int btrfs_limit_qgroup(struct btrfs_trans_handle *trans,
int btrfs_read_qgroup_config(struct btrfs_fs_info *fs_info);
void btrfs_free_qgroup_config(struct btrfs_fs_info *fs_info);
struct btrfs_delayed_extent_op;
-int btrfs_qgroup_record_ref(struct btrfs_trans_handle *trans,
- struct btrfs_fs_info *fs_info, u64 ref_root,
+int btrfs_qgroup_prepare_account_extents(struct btrfs_trans_handle *trans,
+ struct btrfs_fs_info *fs_info);
+struct btrfs_qgroup_extent_record
+*btrfs_qgroup_insert_dirty_extent(struct btrfs_delayed_ref_root *delayed_refs,
+ struct btrfs_qgroup_extent_record *record);
+int
+btrfs_qgroup_account_extent(struct btrfs_trans_handle *trans,
+ struct btrfs_fs_info *fs_info,
u64 bytenr, u64 num_bytes,
- enum btrfs_qgroup_operation_type type,
- int mod_seq);
-int btrfs_delayed_qgroup_accounting(struct btrfs_trans_handle *trans,
- struct btrfs_fs_info *fs_info);
-void btrfs_remove_qgroup_operation(struct btrfs_trans_handle *trans,
- struct btrfs_fs_info *fs_info,
- struct btrfs_qgroup_operation *oper);
+ struct ulist *old_roots, struct ulist *new_roots);
+int btrfs_qgroup_account_extents(struct btrfs_trans_handle *trans,
+ struct btrfs_fs_info *fs_info);
int btrfs_run_qgroups(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info);
int btrfs_qgroup_inherit(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info, u64 srcid, u64 objectid,
struct btrfs_qgroup_inherit *inherit);
-int btrfs_qgroup_reserve(struct btrfs_root *root, u64 num_bytes);
-void btrfs_qgroup_free(struct btrfs_root *root, u64 num_bytes);
-
+void btrfs_qgroup_free_refroot(struct btrfs_fs_info *fs_info,
+ u64 ref_root, u64 num_bytes);
+/*
+ * TODO: Add proper trace point for it, as btrfs_qgroup_free() is
+ * called by everywhere, can't provide good trace for delayed ref case.
+ */
+static inline void btrfs_qgroup_free_delayed_ref(struct btrfs_fs_info *fs_info,
+ u64 ref_root, u64 num_bytes)
+{
+ btrfs_qgroup_free_refroot(fs_info, ref_root, num_bytes);
+ trace_btrfs_qgroup_free_delayed_ref(ref_root, num_bytes);
+}
void assert_qgroups_uptodate(struct btrfs_trans_handle *trans);
#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
@@ -104,4 +97,13 @@ int btrfs_verify_qgroup_counts(struct btrfs_fs_info *fs_info, u64 qgroupid,
u64 rfer, u64 excl);
#endif
+/* New io_tree based accurate qgroup reserve API */
+int btrfs_qgroup_reserve_data(struct inode *inode, u64 start, u64 len);
+int btrfs_qgroup_release_data(struct inode *inode, u64 start, u64 len);
+int btrfs_qgroup_free_data(struct inode *inode, u64 start, u64 len);
+
+int btrfs_qgroup_reserve_meta(struct btrfs_root *root, int num_bytes);
+void btrfs_qgroup_free_meta_all(struct btrfs_root *root);
+void btrfs_qgroup_free_meta(struct btrfs_root *root, int num_bytes);
+void btrfs_qgroup_check_reserved_leak(struct inode *inode);
#endif /* __BTRFS_QGROUP__ */
diff --git a/kernel/fs/btrfs/raid56.c b/kernel/fs/btrfs/raid56.c
index fa72068bd..1a33d3eb3 100644
--- a/kernel/fs/btrfs/raid56.c
+++ b/kernel/fs/btrfs/raid56.c
@@ -61,9 +61,10 @@
#define RBIO_CACHE_SIZE 1024
enum btrfs_rbio_ops {
- BTRFS_RBIO_WRITE = 0,
- BTRFS_RBIO_READ_REBUILD = 1,
- BTRFS_RBIO_PARITY_SCRUB = 2,
+ BTRFS_RBIO_WRITE,
+ BTRFS_RBIO_READ_REBUILD,
+ BTRFS_RBIO_PARITY_SCRUB,
+ BTRFS_RBIO_REBUILD_MISSING,
};
struct btrfs_raid_bio {
@@ -602,6 +603,10 @@ static int rbio_can_merge(struct btrfs_raid_bio *last,
cur->operation == BTRFS_RBIO_PARITY_SCRUB)
return 0;
+ if (last->operation == BTRFS_RBIO_REBUILD_MISSING ||
+ cur->operation == BTRFS_RBIO_REBUILD_MISSING)
+ return 0;
+
return 1;
}
@@ -793,7 +798,10 @@ static noinline void unlock_stripe(struct btrfs_raid_bio *rbio)
if (next->operation == BTRFS_RBIO_READ_REBUILD)
async_read_rebuild(next);
- else if (next->operation == BTRFS_RBIO_WRITE) {
+ else if (next->operation == BTRFS_RBIO_REBUILD_MISSING) {
+ steal_rbio(rbio, next);
+ async_read_rebuild(next);
+ } else if (next->operation == BTRFS_RBIO_WRITE) {
steal_rbio(rbio, next);
async_rmw_stripe(next);
} else if (next->operation == BTRFS_RBIO_PARITY_SCRUB) {
@@ -802,7 +810,11 @@ static noinline void unlock_stripe(struct btrfs_raid_bio *rbio)
}
goto done_nolock;
- } else if (waitqueue_active(&h->wait)) {
+ /*
+ * The barrier for this waitqueue_active is not needed,
+ * we're protected by h->lock and can't miss a wakeup.
+ */
+ } else if (waitqueue_active(&h->wait)) {
spin_unlock(&rbio->bio_list_lock);
spin_unlock_irqrestore(&h->lock, flags);
wake_up(&h->wait);
@@ -851,7 +863,7 @@ static void free_raid_bio(struct btrfs_raid_bio *rbio)
* this frees the rbio and runs through all the bios in the
* bio_list and calls end_io on them
*/
-static void rbio_orig_end_io(struct btrfs_raid_bio *rbio, int err, int uptodate)
+static void rbio_orig_end_io(struct btrfs_raid_bio *rbio, int err)
{
struct bio *cur = bio_list_get(&rbio->bio_list);
struct bio *next;
@@ -864,9 +876,8 @@ static void rbio_orig_end_io(struct btrfs_raid_bio *rbio, int err, int uptodate)
while (cur) {
next = cur->bi_next;
cur->bi_next = NULL;
- if (uptodate)
- set_bit(BIO_UPTODATE, &cur->bi_flags);
- bio_endio(cur, err);
+ cur->bi_error = err;
+ bio_endio(cur);
cur = next;
}
}
@@ -875,9 +886,10 @@ static void rbio_orig_end_io(struct btrfs_raid_bio *rbio, int err, int uptodate)
* end io function used by finish_rmw. When we finally
* get here, we've written a full stripe
*/
-static void raid_write_end_io(struct bio *bio, int err)
+static void raid_write_end_io(struct bio *bio)
{
struct btrfs_raid_bio *rbio = bio->bi_private;
+ int err = bio->bi_error;
if (err)
fail_bio_stripe(rbio, bio);
@@ -893,7 +905,7 @@ static void raid_write_end_io(struct bio *bio, int err)
if (atomic_read(&rbio->error) > rbio->bbio->max_errors)
err = -EIO;
- rbio_orig_end_io(rbio, err, 0);
+ rbio_orig_end_io(rbio, err);
return;
}
@@ -1071,7 +1083,7 @@ static int rbio_add_io_page(struct btrfs_raid_bio *rbio,
* devices or if they are not contiguous
*/
if (last_end == disk_start && stripe->dev->bdev &&
- test_bit(BIO_UPTODATE, &last->bi_flags) &&
+ !last->bi_error &&
last->bi_bdev == stripe->dev->bdev) {
ret = bio_add_page(last, page, PAGE_CACHE_SIZE, 0);
if (ret == PAGE_CACHE_SIZE)
@@ -1087,7 +1099,6 @@ static int rbio_add_io_page(struct btrfs_raid_bio *rbio,
bio->bi_iter.bi_size = 0;
bio->bi_bdev = stripe->dev->bdev;
bio->bi_iter.bi_sector = disk_start >> 9;
- set_bit(BIO_UPTODATE, &bio->bi_flags);
bio_add_page(bio, page, PAGE_CACHE_SIZE, 0);
bio_list_add(bio_list, bio);
@@ -1312,13 +1323,12 @@ write_data:
bio->bi_private = rbio;
bio->bi_end_io = raid_write_end_io;
- BUG_ON(!test_bit(BIO_UPTODATE, &bio->bi_flags));
submit_bio(WRITE, bio);
}
return;
cleanup:
- rbio_orig_end_io(rbio, -EIO, 0);
+ rbio_orig_end_io(rbio, -EIO);
}
/*
@@ -1441,11 +1451,11 @@ static void set_bio_pages_uptodate(struct bio *bio)
* This will usually kick off finish_rmw once all the bios are read in, but it
* may trigger parity reconstruction if we had any errors along the way
*/
-static void raid_rmw_end_io(struct bio *bio, int err)
+static void raid_rmw_end_io(struct bio *bio)
{
struct btrfs_raid_bio *rbio = bio->bi_private;
- if (err)
+ if (bio->bi_error)
fail_bio_stripe(rbio, bio);
else
set_bio_pages_uptodate(bio);
@@ -1455,7 +1465,6 @@ static void raid_rmw_end_io(struct bio *bio, int err)
if (!atomic_dec_and_test(&rbio->stripes_pending))
return;
- err = 0;
if (atomic_read(&rbio->error) > rbio->bbio->max_errors)
goto cleanup;
@@ -1469,7 +1478,7 @@ static void raid_rmw_end_io(struct bio *bio, int err)
cleanup:
- rbio_orig_end_io(rbio, -EIO, 0);
+ rbio_orig_end_io(rbio, -EIO);
}
static void async_rmw_stripe(struct btrfs_raid_bio *rbio)
@@ -1572,14 +1581,13 @@ static int raid56_rmw_stripe(struct btrfs_raid_bio *rbio)
btrfs_bio_wq_end_io(rbio->fs_info, bio,
BTRFS_WQ_ENDIO_RAID56);
- BUG_ON(!test_bit(BIO_UPTODATE, &bio->bi_flags));
submit_bio(READ, bio);
}
/* the actual write will happen once the reads are done */
return 0;
cleanup:
- rbio_orig_end_io(rbio, -EIO, 0);
+ rbio_orig_end_io(rbio, -EIO);
return -EIO;
finish:
@@ -1809,7 +1817,8 @@ static void __raid_recover_end_io(struct btrfs_raid_bio *rbio)
faila = rbio->faila;
failb = rbio->failb;
- if (rbio->operation == BTRFS_RBIO_READ_REBUILD) {
+ if (rbio->operation == BTRFS_RBIO_READ_REBUILD ||
+ rbio->operation == BTRFS_RBIO_REBUILD_MISSING) {
spin_lock_irq(&rbio->bio_list_lock);
set_bit(RBIO_RMW_LOCKED_BIT, &rbio->flags);
spin_unlock_irq(&rbio->bio_list_lock);
@@ -1834,7 +1843,8 @@ static void __raid_recover_end_io(struct btrfs_raid_bio *rbio)
* if we're rebuilding a read, we have to use
* pages from the bio list
*/
- if (rbio->operation == BTRFS_RBIO_READ_REBUILD &&
+ if ((rbio->operation == BTRFS_RBIO_READ_REBUILD ||
+ rbio->operation == BTRFS_RBIO_REBUILD_MISSING) &&
(stripe == faila || stripe == failb)) {
page = page_in_rbio(rbio, stripe, pagenr, 0);
} else {
@@ -1943,7 +1953,8 @@ pstripe:
* if we're rebuilding a read, we have to use
* pages from the bio list
*/
- if (rbio->operation == BTRFS_RBIO_READ_REBUILD &&
+ if ((rbio->operation == BTRFS_RBIO_READ_REBUILD ||
+ rbio->operation == BTRFS_RBIO_REBUILD_MISSING) &&
(stripe == faila || stripe == failb)) {
page = page_in_rbio(rbio, stripe, pagenr, 0);
} else {
@@ -1964,7 +1975,9 @@ cleanup_io:
else
clear_bit(RBIO_CACHE_READY_BIT, &rbio->flags);
- rbio_orig_end_io(rbio, err, err == 0);
+ rbio_orig_end_io(rbio, err);
+ } else if (rbio->operation == BTRFS_RBIO_REBUILD_MISSING) {
+ rbio_orig_end_io(rbio, err);
} else if (err == 0) {
rbio->faila = -1;
rbio->failb = -1;
@@ -1976,7 +1989,7 @@ cleanup_io:
else
BUG();
} else {
- rbio_orig_end_io(rbio, err, 0);
+ rbio_orig_end_io(rbio, err);
}
}
@@ -1984,7 +1997,7 @@ cleanup_io:
* This is called only for stripes we've read from disk to
* reconstruct the parity.
*/
-static void raid_recover_end_io(struct bio *bio, int err)
+static void raid_recover_end_io(struct bio *bio)
{
struct btrfs_raid_bio *rbio = bio->bi_private;
@@ -1992,7 +2005,7 @@ static void raid_recover_end_io(struct bio *bio, int err)
* we only read stripe pages off the disk, set them
* up to date if there were no errors
*/
- if (err)
+ if (bio->bi_error)
fail_bio_stripe(rbio, bio);
else
set_bio_pages_uptodate(bio);
@@ -2002,7 +2015,7 @@ static void raid_recover_end_io(struct bio *bio, int err)
return;
if (atomic_read(&rbio->error) > rbio->bbio->max_errors)
- rbio_orig_end_io(rbio, -EIO, 0);
+ rbio_orig_end_io(rbio, -EIO);
else
__raid_recover_end_io(rbio);
}
@@ -2094,15 +2107,15 @@ static int __raid56_parity_recover(struct btrfs_raid_bio *rbio)
btrfs_bio_wq_end_io(rbio->fs_info, bio,
BTRFS_WQ_ENDIO_RAID56);
- BUG_ON(!test_bit(BIO_UPTODATE, &bio->bi_flags));
submit_bio(READ, bio);
}
out:
return 0;
cleanup:
- if (rbio->operation == BTRFS_RBIO_READ_REBUILD)
- rbio_orig_end_io(rbio, -EIO, 0);
+ if (rbio->operation == BTRFS_RBIO_READ_REBUILD ||
+ rbio->operation == BTRFS_RBIO_REBUILD_MISSING)
+ rbio_orig_end_io(rbio, -EIO);
return -EIO;
}
@@ -2232,8 +2245,9 @@ raid56_parity_alloc_scrub_rbio(struct btrfs_root *root, struct bio *bio,
return rbio;
}
-void raid56_parity_add_scrub_pages(struct btrfs_raid_bio *rbio,
- struct page *page, u64 logical)
+/* Used for both parity scrub and missing. */
+void raid56_add_scrub_pages(struct btrfs_raid_bio *rbio, struct page *page,
+ u64 logical)
{
int stripe_offset;
int index;
@@ -2277,11 +2291,12 @@ static int alloc_rbio_essential_pages(struct btrfs_raid_bio *rbio)
* end io function used by finish_rmw. When we finally
* get here, we've written a full stripe
*/
-static void raid_write_parity_end_io(struct bio *bio, int err)
+static void raid_write_parity_end_io(struct bio *bio)
{
struct btrfs_raid_bio *rbio = bio->bi_private;
+ int err = bio->bi_error;
- if (err)
+ if (bio->bi_error)
fail_bio_stripe(rbio, bio);
bio_put(bio);
@@ -2294,7 +2309,7 @@ static void raid_write_parity_end_io(struct bio *bio, int err)
if (atomic_read(&rbio->error))
err = -EIO;
- rbio_orig_end_io(rbio, err, 0);
+ rbio_orig_end_io(rbio, err);
}
static noinline void finish_parity_scrub(struct btrfs_raid_bio *rbio,
@@ -2437,7 +2452,7 @@ submit_write:
nr_data = bio_list_size(&bio_list);
if (!nr_data) {
/* Every parity is right */
- rbio_orig_end_io(rbio, 0, 0);
+ rbio_orig_end_io(rbio, 0);
return;
}
@@ -2450,13 +2465,12 @@ submit_write:
bio->bi_private = rbio;
bio->bi_end_io = raid_write_parity_end_io;
- BUG_ON(!test_bit(BIO_UPTODATE, &bio->bi_flags));
submit_bio(WRITE, bio);
}
return;
cleanup:
- rbio_orig_end_io(rbio, -EIO, 0);
+ rbio_orig_end_io(rbio, -EIO);
}
static inline int is_data_stripe(struct btrfs_raid_bio *rbio, int stripe)
@@ -2524,7 +2538,7 @@ static void validate_rbio_for_parity_scrub(struct btrfs_raid_bio *rbio)
return;
cleanup:
- rbio_orig_end_io(rbio, -EIO, 0);
+ rbio_orig_end_io(rbio, -EIO);
}
/*
@@ -2535,11 +2549,11 @@ cleanup:
* This will usually kick off finish_rmw once all the bios are read in, but it
* may trigger parity reconstruction if we had any errors along the way
*/
-static void raid56_parity_scrub_end_io(struct bio *bio, int err)
+static void raid56_parity_scrub_end_io(struct bio *bio)
{
struct btrfs_raid_bio *rbio = bio->bi_private;
- if (err)
+ if (bio->bi_error)
fail_bio_stripe(rbio, bio);
else
set_bio_pages_uptodate(bio);
@@ -2632,14 +2646,13 @@ static void raid56_parity_scrub_stripe(struct btrfs_raid_bio *rbio)
btrfs_bio_wq_end_io(rbio->fs_info, bio,
BTRFS_WQ_ENDIO_RAID56);
- BUG_ON(!test_bit(BIO_UPTODATE, &bio->bi_flags));
submit_bio(READ, bio);
}
/* the actual write will happen once the reads are done */
return;
cleanup:
- rbio_orig_end_io(rbio, -EIO, 0);
+ rbio_orig_end_io(rbio, -EIO);
return;
finish:
@@ -2668,3 +2681,55 @@ void raid56_parity_submit_scrub_rbio(struct btrfs_raid_bio *rbio)
if (!lock_stripe_add(rbio))
async_scrub_parity(rbio);
}
+
+/* The following code is used for dev replace of a missing RAID 5/6 device. */
+
+struct btrfs_raid_bio *
+raid56_alloc_missing_rbio(struct btrfs_root *root, struct bio *bio,
+ struct btrfs_bio *bbio, u64 length)
+{
+ struct btrfs_raid_bio *rbio;
+
+ rbio = alloc_rbio(root, bbio, length);
+ if (IS_ERR(rbio))
+ return NULL;
+
+ rbio->operation = BTRFS_RBIO_REBUILD_MISSING;
+ bio_list_add(&rbio->bio_list, bio);
+ /*
+ * This is a special bio which is used to hold the completion handler
+ * and make the scrub rbio is similar to the other types
+ */
+ ASSERT(!bio->bi_iter.bi_size);
+
+ rbio->faila = find_logical_bio_stripe(rbio, bio);
+ if (rbio->faila == -1) {
+ BUG();
+ kfree(rbio);
+ return NULL;
+ }
+
+ return rbio;
+}
+
+static void missing_raid56_work(struct btrfs_work *work)
+{
+ struct btrfs_raid_bio *rbio;
+
+ rbio = container_of(work, struct btrfs_raid_bio, work);
+ __raid56_parity_recover(rbio);
+}
+
+static void async_missing_raid56(struct btrfs_raid_bio *rbio)
+{
+ btrfs_init_work(&rbio->work, btrfs_rmw_helper,
+ missing_raid56_work, NULL, NULL);
+
+ btrfs_queue_work(rbio->fs_info->rmw_workers, &rbio->work);
+}
+
+void raid56_submit_missing_rbio(struct btrfs_raid_bio *rbio)
+{
+ if (!lock_stripe_add(rbio))
+ async_missing_raid56(rbio);
+}
diff --git a/kernel/fs/btrfs/raid56.h b/kernel/fs/btrfs/raid56.h
index 2b5d7977d..8b694699d 100644
--- a/kernel/fs/btrfs/raid56.h
+++ b/kernel/fs/btrfs/raid56.h
@@ -48,15 +48,21 @@ int raid56_parity_recover(struct btrfs_root *root, struct bio *bio,
int raid56_parity_write(struct btrfs_root *root, struct bio *bio,
struct btrfs_bio *bbio, u64 stripe_len);
+void raid56_add_scrub_pages(struct btrfs_raid_bio *rbio, struct page *page,
+ u64 logical);
+
struct btrfs_raid_bio *
raid56_parity_alloc_scrub_rbio(struct btrfs_root *root, struct bio *bio,
struct btrfs_bio *bbio, u64 stripe_len,
struct btrfs_device *scrub_dev,
unsigned long *dbitmap, int stripe_nsectors);
-void raid56_parity_add_scrub_pages(struct btrfs_raid_bio *rbio,
- struct page *page, u64 logical);
void raid56_parity_submit_scrub_rbio(struct btrfs_raid_bio *rbio);
+struct btrfs_raid_bio *
+raid56_alloc_missing_rbio(struct btrfs_root *root, struct bio *bio,
+ struct btrfs_bio *bbio, u64 length);
+void raid56_submit_missing_rbio(struct btrfs_raid_bio *rbio);
+
int btrfs_alloc_stripe_hash_table(struct btrfs_fs_info *info);
void btrfs_free_stripe_hash_table(struct btrfs_fs_info *info);
#endif
diff --git a/kernel/fs/btrfs/reada.c b/kernel/fs/btrfs/reada.c
index 0e7beea92..619f92963 100644
--- a/kernel/fs/btrfs/reada.c
+++ b/kernel/fs/btrfs/reada.c
@@ -328,6 +328,7 @@ static struct reada_extent *reada_find_extent(struct btrfs_root *root,
struct btrfs_device *prev_dev;
u32 blocksize;
u64 length;
+ int real_stripes;
int nzones = 0;
int i;
unsigned long index = logical >> PAGE_CACHE_SHIFT;
@@ -369,7 +370,8 @@ static struct reada_extent *reada_find_extent(struct btrfs_root *root,
goto error;
}
- for (nzones = 0; nzones < bbio->num_stripes; ++nzones) {
+ real_stripes = bbio->num_stripes - bbio->num_tgtdevs;
+ for (nzones = 0; nzones < real_stripes; ++nzones) {
struct reada_zone *zone;
dev = bbio->stripes[nzones].dev;
@@ -567,7 +569,7 @@ static int reada_add_block(struct reada_control *rc, u64 logical,
rec = kzalloc(sizeof(*rec), GFP_NOFS);
if (!rec) {
reada_extent_put(root->fs_info, re);
- return -1;
+ return -ENOMEM;
}
rec->rc = rc;
@@ -916,6 +918,7 @@ struct reada_control *btrfs_reada_add(struct btrfs_root *root,
u64 start;
u64 generation;
int level;
+ int ret;
struct extent_buffer *node;
static struct btrfs_key max_key = {
.objectid = (u64)-1,
@@ -941,9 +944,10 @@ struct reada_control *btrfs_reada_add(struct btrfs_root *root,
generation = btrfs_header_generation(node);
free_extent_buffer(node);
- if (reada_add_block(rc, start, &max_key, level, generation)) {
+ ret = reada_add_block(rc, start, &max_key, level, generation);
+ if (ret) {
kfree(rc);
- return ERR_PTR(-ENOMEM);
+ return ERR_PTR(ret);
}
reada_start_machine(root->fs_info);
diff --git a/kernel/fs/btrfs/relocation.c b/kernel/fs/btrfs/relocation.c
index 74b24b01d..b4ca5454e 100644
--- a/kernel/fs/btrfs/relocation.c
+++ b/kernel/fs/btrfs/relocation.c
@@ -1716,7 +1716,7 @@ int replace_file_extents(struct btrfs_trans_handle *trans,
ret = btrfs_inc_extent_ref(trans, root, new_bytenr,
num_bytes, parent,
btrfs_header_owner(leaf),
- key.objectid, key.offset, 1);
+ key.objectid, key.offset);
if (ret) {
btrfs_abort_transaction(trans, root, ret);
break;
@@ -1724,7 +1724,7 @@ int replace_file_extents(struct btrfs_trans_handle *trans,
ret = btrfs_free_extent(trans, root, bytenr, num_bytes,
parent, btrfs_header_owner(leaf),
- key.objectid, key.offset, 1);
+ key.objectid, key.offset);
if (ret) {
btrfs_abort_transaction(trans, root, ret);
break;
@@ -1847,8 +1847,10 @@ again:
}
eb = read_tree_block(dest, old_bytenr, old_ptr_gen);
- if (!eb || !extent_buffer_uptodate(eb)) {
- ret = (!eb) ? -ENOMEM : -EIO;
+ if (IS_ERR(eb)) {
+ ret = PTR_ERR(eb);
+ } else if (!extent_buffer_uptodate(eb)) {
+ ret = -EIO;
free_extent_buffer(eb);
break;
}
@@ -1898,23 +1900,21 @@ again:
ret = btrfs_inc_extent_ref(trans, src, old_bytenr, blocksize,
path->nodes[level]->start,
- src->root_key.objectid, level - 1, 0,
- 1);
+ src->root_key.objectid, level - 1, 0);
BUG_ON(ret);
ret = btrfs_inc_extent_ref(trans, dest, new_bytenr, blocksize,
0, dest->root_key.objectid, level - 1,
- 0, 1);
+ 0);
BUG_ON(ret);
ret = btrfs_free_extent(trans, src, new_bytenr, blocksize,
path->nodes[level]->start,
- src->root_key.objectid, level - 1, 0,
- 1);
+ src->root_key.objectid, level - 1, 0);
BUG_ON(ret);
ret = btrfs_free_extent(trans, dest, old_bytenr, blocksize,
0, dest->root_key.objectid, level - 1,
- 0, 1);
+ 0);
BUG_ON(ret);
btrfs_unlock_up_safe(path, 0);
@@ -2002,7 +2002,9 @@ int walk_down_reloc_tree(struct btrfs_root *root, struct btrfs_path *path,
bytenr = btrfs_node_blockptr(eb, path->slots[i]);
eb = read_tree_block(root, bytenr, ptr_gen);
- if (!eb || !extent_buffer_uptodate(eb)) {
+ if (IS_ERR(eb)) {
+ return PTR_ERR(eb);
+ } else if (!extent_buffer_uptodate(eb)) {
free_extent_buffer(eb);
return -EIO;
}
@@ -2414,7 +2416,7 @@ again:
}
out:
if (ret) {
- btrfs_std_error(root->fs_info, ret);
+ btrfs_std_error(root->fs_info, ret, NULL);
if (!list_empty(&reloc_roots))
free_reloc_roots(&reloc_roots);
@@ -2519,8 +2521,7 @@ struct btrfs_root *select_reloc_root(struct btrfs_trans_handle *trans,
* counted. return -ENOENT if the block is root of reloc tree.
*/
static noinline_for_stack
-struct btrfs_root *select_one_root(struct btrfs_trans_handle *trans,
- struct backref_node *node)
+struct btrfs_root *select_one_root(struct backref_node *node)
{
struct backref_node *next;
struct btrfs_root *root;
@@ -2710,7 +2711,10 @@ static int do_relocation(struct btrfs_trans_handle *trans,
blocksize = root->nodesize;
generation = btrfs_node_ptr_generation(upper->eb, slot);
eb = read_tree_block(root, bytenr, generation);
- if (!eb || !extent_buffer_uptodate(eb)) {
+ if (IS_ERR(eb)) {
+ err = PTR_ERR(eb);
+ goto next;
+ } else if (!extent_buffer_uptodate(eb)) {
free_extent_buffer(eb);
err = -EIO;
goto next;
@@ -2739,7 +2743,7 @@ static int do_relocation(struct btrfs_trans_handle *trans,
node->eb->start, blocksize,
upper->eb->start,
btrfs_header_owner(upper->eb),
- node->level, 0, 1);
+ node->level, 0);
BUG_ON(ret);
ret = btrfs_drop_subtree(trans, root, eb, upper->eb);
@@ -2873,7 +2877,9 @@ static int get_tree_block_key(struct reloc_control *rc,
BUG_ON(block->key_ready);
eb = read_tree_block(rc->extent_root, block->bytenr,
block->key.offset);
- if (!eb || !extent_buffer_uptodate(eb)) {
+ if (IS_ERR(eb)) {
+ return PTR_ERR(eb);
+ } else if (!extent_buffer_uptodate(eb)) {
free_extent_buffer(eb);
return -EIO;
}
@@ -2903,7 +2909,7 @@ static int relocate_tree_block(struct btrfs_trans_handle *trans,
return 0;
BUG_ON(node->processed);
- root = select_one_root(trans, node);
+ root = select_one_root(node);
if (root == ERR_PTR(-ENOENT)) {
update_processed_blocks(rc, node);
goto out;
@@ -3026,8 +3032,8 @@ int prealloc_file_extent_cluster(struct inode *inode,
BUG_ON(cluster->start != cluster->boundary[0]);
mutex_lock(&inode->i_mutex);
- ret = btrfs_check_data_free_space(inode, cluster->end +
- 1 - cluster->start, 0);
+ ret = btrfs_check_data_free_space(inode, cluster->start,
+ cluster->end + 1 - cluster->start);
if (ret)
goto out;
@@ -3048,8 +3054,8 @@ int prealloc_file_extent_cluster(struct inode *inode,
break;
nr++;
}
- btrfs_free_reserved_data_space(inode, cluster->end +
- 1 - cluster->start);
+ btrfs_free_reserved_data_space(inode, cluster->start,
+ cluster->end + 1 - cluster->start);
out:
mutex_unlock(&inode->i_mutex);
return ret;
@@ -3746,8 +3752,7 @@ out:
* helper to find next unprocessed extent
*/
static noinline_for_stack
-int find_next_extent(struct btrfs_trans_handle *trans,
- struct reloc_control *rc, struct btrfs_path *path,
+int find_next_extent(struct reloc_control *rc, struct btrfs_path *path,
struct btrfs_key *extent_key)
{
struct btrfs_key key;
@@ -3942,7 +3947,7 @@ restart:
continue;
}
- ret = find_next_extent(trans, rc, path, &key);
+ ret = find_next_extent(rc, path, &key);
if (ret < 0)
err = ret;
if (ret != 0)
@@ -3967,6 +3972,10 @@ restart:
sizeof(struct btrfs_extent_item_v0));
ret = get_ref_objectid_v0(rc, path, &key, &ref_owner,
&path_change);
+ if (ret < 0) {
+ err = ret;
+ break;
+ }
if (ref_owner < BTRFS_FIRST_FREE_OBJECTID)
flags = BTRFS_EXTENT_FLAG_TREE_BLOCK;
else
@@ -4040,7 +4049,7 @@ restart:
if (trans && progress && err == -ENOSPC) {
ret = btrfs_force_chunk_alloc(trans, rc->extent_root,
rc->block_group->flags);
- if (ret == 0) {
+ if (ret == 1) {
err = 0;
progress = 0;
goto restart;
@@ -4131,7 +4140,7 @@ struct inode *create_reloc_inode(struct btrfs_fs_info *fs_info,
struct btrfs_trans_handle *trans;
struct btrfs_root *root;
struct btrfs_key key;
- u64 objectid = BTRFS_FIRST_FREE_OBJECTID;
+ u64 objectid;
int err = 0;
root = read_fs_root(fs_info, BTRFS_DATA_RELOC_TREE_OBJECTID);
@@ -4206,14 +4215,12 @@ int btrfs_relocate_block_group(struct btrfs_root *extent_root, u64 group_start)
rc->block_group = btrfs_lookup_block_group(fs_info, group_start);
BUG_ON(!rc->block_group);
- if (!rc->block_group->ro) {
- ret = btrfs_set_block_group_ro(extent_root, rc->block_group);
- if (ret) {
- err = ret;
- goto out;
- }
- rw = 1;
+ ret = btrfs_inc_block_group_ro(extent_root, rc->block_group);
+ if (ret) {
+ err = ret;
+ goto out;
}
+ rw = 1;
path = btrfs_alloc_path();
if (!path) {
@@ -4285,7 +4292,7 @@ int btrfs_relocate_block_group(struct btrfs_root *extent_root, u64 group_start)
WARN_ON(btrfs_block_group_used(&rc->block_group->item) > 0);
out:
if (err && rw)
- btrfs_set_block_group_rw(extent_root, rc->block_group);
+ btrfs_dec_block_group_ro(extent_root, rc->block_group);
iput(rc->data_inode);
btrfs_put_block_group(rc->block_group);
kfree(rc);
@@ -4585,8 +4592,7 @@ int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
* called before creating snapshot. it calculates metadata reservation
* requried for relocating tree blocks in the snapshot
*/
-void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle *trans,
- struct btrfs_pending_snapshot *pending,
+void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending,
u64 *bytes_to_reserve)
{
struct btrfs_root *root;
diff --git a/kernel/fs/btrfs/root-tree.c b/kernel/fs/btrfs/root-tree.c
index 360a728a6..2c849b08a 100644
--- a/kernel/fs/btrfs/root-tree.c
+++ b/kernel/fs/btrfs/root-tree.c
@@ -45,12 +45,13 @@ static void btrfs_read_root_item(struct extent_buffer *eb, int slot,
if (!need_reset && btrfs_root_generation(item)
!= btrfs_root_generation_v2(item)) {
if (btrfs_root_generation_v2(item) != 0) {
- printk(KERN_WARNING "BTRFS: mismatching "
+ btrfs_warn(eb->fs_info,
+ "mismatching "
"generation and generation_v2 "
"found in root item. This root "
"was probably mounted with an "
"older kernel. Resetting all "
- "new fields.\n");
+ "new fields.");
}
need_reset = 1;
}
@@ -141,7 +142,7 @@ int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
int ret;
int slot;
unsigned long ptr;
- int old_len;
+ u32 old_len;
path = btrfs_alloc_path();
if (!path)
@@ -283,7 +284,7 @@ int btrfs_find_orphan_roots(struct btrfs_root *tree_root)
trans = btrfs_join_transaction(tree_root);
if (IS_ERR(trans)) {
err = PTR_ERR(trans);
- btrfs_error(tree_root->fs_info, err,
+ btrfs_std_error(tree_root->fs_info, err,
"Failed to start trans to delete "
"orphan item");
break;
@@ -292,7 +293,7 @@ int btrfs_find_orphan_roots(struct btrfs_root *tree_root)
root_key.objectid);
btrfs_end_transaction(trans, tree_root);
if (err) {
- btrfs_error(tree_root->fs_info, err,
+ btrfs_std_error(tree_root->fs_info, err,
"Failed to delete root orphan "
"item");
break;
@@ -309,8 +310,16 @@ int btrfs_find_orphan_roots(struct btrfs_root *tree_root)
set_bit(BTRFS_ROOT_ORPHAN_ITEM_INSERTED, &root->state);
err = btrfs_insert_fs_root(root->fs_info, root);
+ /*
+ * The root might have been inserted already, as before we look
+ * for orphan roots, log replay might have happened, which
+ * triggers a transaction commit and qgroup accounting, which
+ * in turn reads and inserts fs roots while doing backref
+ * walking.
+ */
+ if (err == -EEXIST)
+ err = 0;
if (err) {
- BUG_ON(err == -EEXIST);
btrfs_free_fs_root(root);
break;
}
diff --git a/kernel/fs/btrfs/scrub.c b/kernel/fs/btrfs/scrub.c
index ab5811545..b091d94ce 100644
--- a/kernel/fs/btrfs/scrub.c
+++ b/kernel/fs/btrfs/scrub.c
@@ -125,6 +125,7 @@ struct scrub_block {
/* It is for the data with checksum */
unsigned int data_corrected:1;
};
+ struct btrfs_work work;
};
/* Used for the chunks with parity stripe such RAID5/6 */
@@ -247,14 +248,9 @@ static int scrub_handle_errored_block(struct scrub_block *sblock_to_check);
static int scrub_setup_recheck_block(struct scrub_block *original_sblock,
struct scrub_block *sblocks_for_recheck);
static void scrub_recheck_block(struct btrfs_fs_info *fs_info,
- struct scrub_block *sblock, int is_metadata,
- int have_csum, u8 *csum, u64 generation,
- u16 csum_size, int retry_failed_mirror);
-static void scrub_recheck_block_checksum(struct btrfs_fs_info *fs_info,
- struct scrub_block *sblock,
- int is_metadata, int have_csum,
- const u8 *csum, u64 generation,
- u16 csum_size);
+ struct scrub_block *sblock,
+ int retry_failed_mirror);
+static void scrub_recheck_block_checksum(struct scrub_block *sblock);
static int scrub_repair_block_from_good_copy(struct scrub_block *sblock_bad,
struct scrub_block *sblock_good);
static int scrub_repair_page_from_good_copy(struct scrub_block *sblock_bad,
@@ -278,7 +274,7 @@ static int scrub_pages(struct scrub_ctx *sctx, u64 logical, u64 len,
u64 physical, struct btrfs_device *dev, u64 flags,
u64 gen, int mirror_num, u8 *csum, int force,
u64 physical_for_dev_replace);
-static void scrub_bio_end_io(struct bio *bio, int err);
+static void scrub_bio_end_io(struct bio *bio);
static void scrub_bio_end_io_worker(struct btrfs_work *work);
static void scrub_block_complete(struct scrub_block *sblock);
static void scrub_remap_extent(struct btrfs_fs_info *fs_info,
@@ -295,7 +291,7 @@ static void scrub_free_wr_ctx(struct scrub_wr_ctx *wr_ctx);
static int scrub_add_page_to_wr_bio(struct scrub_ctx *sctx,
struct scrub_page *spage);
static void scrub_wr_submit(struct scrub_ctx *sctx);
-static void scrub_wr_bio_end_io(struct bio *bio, int err);
+static void scrub_wr_bio_end_io(struct bio *bio);
static void scrub_wr_bio_end_io_worker(struct btrfs_work *work);
static int write_page_nocow(struct scrub_ctx *sctx,
u64 physical_for_dev_replace, struct page *page);
@@ -332,11 +328,14 @@ static void __scrub_blocked_if_needed(struct btrfs_fs_info *fs_info)
}
}
-static void scrub_blocked_if_needed(struct btrfs_fs_info *fs_info)
+static void scrub_pause_on(struct btrfs_fs_info *fs_info)
{
atomic_inc(&fs_info->scrubs_paused);
wake_up(&fs_info->scrub_pause_wait);
+}
+static void scrub_pause_off(struct btrfs_fs_info *fs_info)
+{
mutex_lock(&fs_info->scrub_lock);
__scrub_blocked_if_needed(fs_info);
atomic_dec(&fs_info->scrubs_paused);
@@ -345,6 +344,12 @@ static void scrub_blocked_if_needed(struct btrfs_fs_info *fs_info)
wake_up(&fs_info->scrub_pause_wait);
}
+static void scrub_blocked_if_needed(struct btrfs_fs_info *fs_info)
+{
+ scrub_pause_on(fs_info);
+ scrub_pause_off(fs_info);
+}
+
/*
* used for workers that require transaction commits (i.e., for the
* NOCOW case)
@@ -454,27 +459,14 @@ struct scrub_ctx *scrub_setup_ctx(struct btrfs_device *dev, int is_dev_replace)
struct scrub_ctx *sctx;
int i;
struct btrfs_fs_info *fs_info = dev->dev_root->fs_info;
- int pages_per_rd_bio;
int ret;
- /*
- * the setting of pages_per_rd_bio is correct for scrub but might
- * be wrong for the dev_replace code where we might read from
- * different devices in the initial huge bios. However, that
- * code is able to correctly handle the case when adding a page
- * to a bio fails.
- */
- if (dev->bdev)
- pages_per_rd_bio = min_t(int, SCRUB_PAGES_PER_RD_BIO,
- bio_get_nr_vecs(dev->bdev));
- else
- pages_per_rd_bio = SCRUB_PAGES_PER_RD_BIO;
sctx = kzalloc(sizeof(*sctx), GFP_NOFS);
if (!sctx)
goto nomem;
atomic_set(&sctx->refs, 1);
sctx->is_dev_replace = is_dev_replace;
- sctx->pages_per_rd_bio = pages_per_rd_bio;
+ sctx->pages_per_rd_bio = SCRUB_PAGES_PER_RD_BIO;
sctx->curr = -1;
sctx->dev_root = dev->dev_root;
for (i = 0; i < SCRUB_BIOS_PER_SCTX; ++i) {
@@ -583,9 +575,9 @@ static int scrub_print_warning_inode(u64 inum, u64 offset, u64 root,
* hold all of the paths here
*/
for (i = 0; i < ipath->fspath->elem_cnt; ++i)
- printk_in_rcu(KERN_WARNING "BTRFS: %s at logical %llu on dev "
+ btrfs_warn_in_rcu(fs_info, "%s at logical %llu on dev "
"%s, sector %llu, root %llu, inode %llu, offset %llu, "
- "length %llu, links %u (path: %s)\n", swarn->errstr,
+ "length %llu, links %u (path: %s)", swarn->errstr,
swarn->logical, rcu_str_deref(swarn->dev->name),
(unsigned long long)swarn->sector, root, inum, offset,
min(isize - offset, (u64)PAGE_SIZE), nlink,
@@ -595,9 +587,9 @@ static int scrub_print_warning_inode(u64 inum, u64 offset, u64 root,
return 0;
err:
- printk_in_rcu(KERN_WARNING "BTRFS: %s at logical %llu on dev "
+ btrfs_warn_in_rcu(fs_info, "%s at logical %llu on dev "
"%s, sector %llu, root %llu, inode %llu, offset %llu: path "
- "resolving failed with ret=%d\n", swarn->errstr,
+ "resolving failed with ret=%d", swarn->errstr,
swarn->logical, rcu_str_deref(swarn->dev->name),
(unsigned long long)swarn->sector, root, inum, offset, ret);
@@ -652,10 +644,10 @@ static void scrub_print_warning(const char *errstr, struct scrub_block *sblock)
ret = tree_backref_for_extent(&ptr, eb, &found_key, ei,
item_size, &ref_root,
&ref_level);
- printk_in_rcu(KERN_WARNING
- "BTRFS: %s at logical %llu on dev %s, "
+ btrfs_warn_in_rcu(fs_info,
+ "%s at logical %llu on dev %s, "
"sector %llu: metadata %s (level %d) in tree "
- "%llu\n", errstr, swarn.logical,
+ "%llu", errstr, swarn.logical,
rcu_str_deref(dev->name),
(unsigned long long)swarn.sector,
ref_level ? "node" : "leaf",
@@ -853,8 +845,8 @@ out:
btrfs_dev_replace_stats_inc(
&sctx->dev_root->fs_info->dev_replace.
num_uncorrectable_read_errors);
- printk_ratelimited_in_rcu(KERN_ERR "BTRFS: "
- "unable to fixup (nodatasum) error at logical %llu on dev %s\n",
+ btrfs_err_rl_in_rcu(sctx->dev_root->fs_info,
+ "unable to fixup (nodatasum) error at logical %llu on dev %s",
fixup->logical, rcu_str_deref(fixup->dev->name));
}
@@ -892,11 +884,9 @@ static int scrub_handle_errored_block(struct scrub_block *sblock_to_check)
struct btrfs_fs_info *fs_info;
u64 length;
u64 logical;
- u64 generation;
unsigned int failed_mirror_index;
unsigned int is_metadata;
unsigned int have_csum;
- u8 *csum;
struct scrub_block *sblocks_for_recheck; /* holds one for each mirror */
struct scrub_block *sblock_bad;
int ret;
@@ -921,13 +911,11 @@ static int scrub_handle_errored_block(struct scrub_block *sblock_to_check)
}
length = sblock_to_check->page_count * PAGE_SIZE;
logical = sblock_to_check->pagev[0]->logical;
- generation = sblock_to_check->pagev[0]->generation;
BUG_ON(sblock_to_check->pagev[0]->mirror_num < 1);
failed_mirror_index = sblock_to_check->pagev[0]->mirror_num - 1;
is_metadata = !(sblock_to_check->pagev[0]->flags &
BTRFS_EXTENT_FLAG_DATA);
have_csum = sblock_to_check->pagev[0]->have_csum;
- csum = sblock_to_check->pagev[0]->csum;
dev = sblock_to_check->pagev[0]->dev;
if (sctx->is_dev_replace && !is_metadata && !have_csum) {
@@ -990,8 +978,7 @@ static int scrub_handle_errored_block(struct scrub_block *sblock_to_check)
sblock_bad = sblocks_for_recheck + failed_mirror_index;
/* build and submit the bios for the failed mirror, check checksums */
- scrub_recheck_block(fs_info, sblock_bad, is_metadata, have_csum,
- csum, generation, sctx->csum_size, 1);
+ scrub_recheck_block(fs_info, sblock_bad, 1);
if (!sblock_bad->header_error && !sblock_bad->checksum_error &&
sblock_bad->no_io_error_seen) {
@@ -1104,9 +1091,7 @@ nodatasum_case:
sblock_other = sblocks_for_recheck + mirror_index;
/* build and submit the bios, check checksums */
- scrub_recheck_block(fs_info, sblock_other, is_metadata,
- have_csum, csum, generation,
- sctx->csum_size, 0);
+ scrub_recheck_block(fs_info, sblock_other, 0);
if (!sblock_other->header_error &&
!sblock_other->checksum_error &&
@@ -1218,9 +1203,7 @@ nodatasum_case:
* is verified, but most likely the data comes out
* of the page cache.
*/
- scrub_recheck_block(fs_info, sblock_bad,
- is_metadata, have_csum, csum,
- generation, sctx->csum_size, 1);
+ scrub_recheck_block(fs_info, sblock_bad, 1);
if (!sblock_bad->header_error &&
!sblock_bad->checksum_error &&
sblock_bad->no_io_error_seen)
@@ -1233,8 +1216,8 @@ corrected_error:
sctx->stat.corrected_errors++;
sblock_to_check->data_corrected = 1;
spin_unlock(&sctx->stat_lock);
- printk_ratelimited_in_rcu(KERN_ERR
- "BTRFS: fixed up error at logical %llu on dev %s\n",
+ btrfs_err_rl_in_rcu(fs_info,
+ "fixed up error at logical %llu on dev %s",
logical, rcu_str_deref(dev->name));
}
} else {
@@ -1242,8 +1225,8 @@ did_not_correct_error:
spin_lock(&sctx->stat_lock);
sctx->stat.uncorrectable_errors++;
spin_unlock(&sctx->stat_lock);
- printk_ratelimited_in_rcu(KERN_ERR
- "BTRFS: unable to fixup (regular) error at logical %llu on dev %s\n",
+ btrfs_err_rl_in_rcu(fs_info,
+ "unable to fixup (regular) error at logical %llu on dev %s",
logical, rcu_str_deref(dev->name));
}
@@ -1321,6 +1304,9 @@ static int scrub_setup_recheck_block(struct scrub_block *original_sblock,
struct btrfs_fs_info *fs_info = sctx->dev_root->fs_info;
u64 length = original_sblock->page_count * PAGE_SIZE;
u64 logical = original_sblock->pagev[0]->logical;
+ u64 generation = original_sblock->pagev[0]->generation;
+ u64 flags = original_sblock->pagev[0]->flags;
+ u64 have_csum = original_sblock->pagev[0]->have_csum;
struct scrub_recover *recover;
struct btrfs_bio *bbio;
u64 sublen;
@@ -1375,6 +1361,7 @@ static int scrub_setup_recheck_block(struct scrub_block *original_sblock,
sblock = sblocks_for_recheck + mirror_index;
sblock->sctx = sctx;
+
page = kzalloc(sizeof(*page), GFP_NOFS);
if (!page) {
leave_nomem:
@@ -1386,7 +1373,15 @@ leave_nomem:
}
scrub_page_get(page);
sblock->pagev[page_index] = page;
+ page->sblock = sblock;
+ page->flags = flags;
+ page->generation = generation;
page->logical = logical;
+ page->have_csum = have_csum;
+ if (have_csum)
+ memcpy(page->csum,
+ original_sblock->pagev[0]->csum,
+ sctx->csum_size);
scrub_stripe_index_and_offset(logical,
bbio->map_type,
@@ -1429,11 +1424,11 @@ struct scrub_bio_ret {
int error;
};
-static void scrub_bio_wait_endio(struct bio *bio, int error)
+static void scrub_bio_wait_endio(struct bio *bio)
{
struct scrub_bio_ret *ret = bio->bi_private;
- ret->error = error;
+ ret->error = bio->bi_error;
complete(&ret->event);
}
@@ -1477,15 +1472,12 @@ static int scrub_submit_raid56_bio_wait(struct btrfs_fs_info *fs_info,
* the pages that are errored in the just handled mirror can be repaired.
*/
static void scrub_recheck_block(struct btrfs_fs_info *fs_info,
- struct scrub_block *sblock, int is_metadata,
- int have_csum, u8 *csum, u64 generation,
- u16 csum_size, int retry_failed_mirror)
+ struct scrub_block *sblock,
+ int retry_failed_mirror)
{
int page_num;
sblock->no_io_error_seen = 1;
- sblock->header_error = 0;
- sblock->checksum_error = 0;
for (page_num = 0; page_num < sblock->page_count; page_num++) {
struct bio *bio;
@@ -1521,9 +1513,7 @@ static void scrub_recheck_block(struct btrfs_fs_info *fs_info,
}
if (sblock->no_io_error_seen)
- scrub_recheck_block_checksum(fs_info, sblock, is_metadata,
- have_csum, csum, generation,
- csum_size);
+ scrub_recheck_block_checksum(sblock);
return;
}
@@ -1538,61 +1528,16 @@ static inline int scrub_check_fsid(u8 fsid[],
return !ret;
}
-static void scrub_recheck_block_checksum(struct btrfs_fs_info *fs_info,
- struct scrub_block *sblock,
- int is_metadata, int have_csum,
- const u8 *csum, u64 generation,
- u16 csum_size)
+static void scrub_recheck_block_checksum(struct scrub_block *sblock)
{
- int page_num;
- u8 calculated_csum[BTRFS_CSUM_SIZE];
- u32 crc = ~(u32)0;
- void *mapped_buffer;
-
- WARN_ON(!sblock->pagev[0]->page);
- if (is_metadata) {
- struct btrfs_header *h;
-
- mapped_buffer = kmap_atomic(sblock->pagev[0]->page);
- h = (struct btrfs_header *)mapped_buffer;
-
- if (sblock->pagev[0]->logical != btrfs_stack_header_bytenr(h) ||
- !scrub_check_fsid(h->fsid, sblock->pagev[0]) ||
- memcmp(h->chunk_tree_uuid, fs_info->chunk_tree_uuid,
- BTRFS_UUID_SIZE)) {
- sblock->header_error = 1;
- } else if (generation != btrfs_stack_header_generation(h)) {
- sblock->header_error = 1;
- sblock->generation_error = 1;
- }
- csum = h->csum;
- } else {
- if (!have_csum)
- return;
-
- mapped_buffer = kmap_atomic(sblock->pagev[0]->page);
- }
-
- for (page_num = 0;;) {
- if (page_num == 0 && is_metadata)
- crc = btrfs_csum_data(
- ((u8 *)mapped_buffer) + BTRFS_CSUM_SIZE,
- crc, PAGE_SIZE - BTRFS_CSUM_SIZE);
- else
- crc = btrfs_csum_data(mapped_buffer, crc, PAGE_SIZE);
-
- kunmap_atomic(mapped_buffer);
- page_num++;
- if (page_num >= sblock->page_count)
- break;
- WARN_ON(!sblock->pagev[page_num]->page);
-
- mapped_buffer = kmap_atomic(sblock->pagev[page_num]->page);
- }
+ sblock->header_error = 0;
+ sblock->checksum_error = 0;
+ sblock->generation_error = 0;
- btrfs_csum_final(crc, calculated_csum);
- if (memcmp(calculated_csum, csum, csum_size))
- sblock->checksum_error = 1;
+ if (sblock->pagev[0]->flags & BTRFS_EXTENT_FLAG_DATA)
+ scrub_checksum_data(sblock);
+ else
+ scrub_checksum_tree_block(sblock);
}
static int scrub_repair_block_from_good_copy(struct scrub_block *sblock_bad,
@@ -1629,9 +1574,9 @@ static int scrub_repair_page_from_good_copy(struct scrub_block *sblock_bad,
int ret;
if (!page_bad->dev->bdev) {
- printk_ratelimited(KERN_WARNING "BTRFS: "
+ btrfs_warn_rl(sblock_bad->sctx->dev_root->fs_info,
"scrub_repair_page_from_good_copy(bdev == NULL) "
- "is unexpected!\n");
+ "is unexpected");
return -EIO;
}
@@ -1790,12 +1735,12 @@ static void scrub_wr_submit(struct scrub_ctx *sctx)
btrfsic_submit_bio(WRITE, sbio->bio);
}
-static void scrub_wr_bio_end_io(struct bio *bio, int err)
+static void scrub_wr_bio_end_io(struct bio *bio)
{
struct scrub_bio *sbio = bio->bi_private;
struct btrfs_fs_info *fs_info = sbio->dev->dev_root->fs_info;
- sbio->err = err;
+ sbio->err = bio->bi_error;
sbio->bio = bio;
btrfs_init_work(&sbio->work, btrfs_scrubwrc_helper,
@@ -1836,6 +1781,18 @@ static int scrub_checksum(struct scrub_block *sblock)
u64 flags;
int ret;
+ /*
+ * No need to initialize these stats currently,
+ * because this function only use return value
+ * instead of these stats value.
+ *
+ * Todo:
+ * always use stats
+ */
+ sblock->header_error = 0;
+ sblock->generation_error = 0;
+ sblock->checksum_error = 0;
+
WARN_ON(sblock->page_count < 1);
flags = sblock->pagev[0]->flags;
ret = 0;
@@ -1861,7 +1818,6 @@ static int scrub_checksum_data(struct scrub_block *sblock)
struct page *page;
void *buffer;
u32 crc = ~(u32)0;
- int fail = 0;
u64 len;
int index;
@@ -1892,9 +1848,9 @@ static int scrub_checksum_data(struct scrub_block *sblock)
btrfs_csum_final(crc, csum);
if (memcmp(csum, on_disk_csum, sctx->csum_size))
- fail = 1;
+ sblock->checksum_error = 1;
- return fail;
+ return sblock->checksum_error;
}
static int scrub_checksum_tree_block(struct scrub_block *sblock)
@@ -1910,8 +1866,6 @@ static int scrub_checksum_tree_block(struct scrub_block *sblock)
u64 mapped_size;
void *p;
u32 crc = ~(u32)0;
- int fail = 0;
- int crc_fail = 0;
u64 len;
int index;
@@ -1926,19 +1880,20 @@ static int scrub_checksum_tree_block(struct scrub_block *sblock)
* a) don't have an extent buffer and
* b) the page is already kmapped
*/
-
if (sblock->pagev[0]->logical != btrfs_stack_header_bytenr(h))
- ++fail;
+ sblock->header_error = 1;
- if (sblock->pagev[0]->generation != btrfs_stack_header_generation(h))
- ++fail;
+ if (sblock->pagev[0]->generation != btrfs_stack_header_generation(h)) {
+ sblock->header_error = 1;
+ sblock->generation_error = 1;
+ }
if (!scrub_check_fsid(h->fsid, sblock->pagev[0]))
- ++fail;
+ sblock->header_error = 1;
if (memcmp(h->chunk_tree_uuid, fs_info->chunk_tree_uuid,
BTRFS_UUID_SIZE))
- ++fail;
+ sblock->header_error = 1;
len = sctx->nodesize - BTRFS_CSUM_SIZE;
mapped_size = PAGE_SIZE - BTRFS_CSUM_SIZE;
@@ -1963,9 +1918,9 @@ static int scrub_checksum_tree_block(struct scrub_block *sblock)
btrfs_csum_final(crc, calculated_csum);
if (memcmp(calculated_csum, on_disk_csum, sctx->csum_size))
- ++crc_fail;
+ sblock->checksum_error = 1;
- return fail || crc_fail;
+ return sblock->header_error || sblock->checksum_error;
}
static int scrub_checksum_super(struct scrub_block *sblock)
@@ -2087,21 +2042,7 @@ static void scrub_submit(struct scrub_ctx *sctx)
sbio = sctx->bios[sctx->curr];
sctx->curr = -1;
scrub_pending_bio_inc(sctx);
-
- if (!sbio->bio->bi_bdev) {
- /*
- * this case should not happen. If btrfs_map_block() is
- * wrong, it could happen for dev-replace operations on
- * missing devices when no mirrors are available, but in
- * this case it should already fail the mount.
- * This case is handled correctly (but _very_ slowly).
- */
- printk_ratelimited(KERN_WARNING
- "BTRFS: scrub_submit(bio bdev == NULL) is unexpected!\n");
- bio_endio(sbio->bio, -EIO);
- } else {
- btrfsic_submit_bio(READ, sbio->bio);
- }
+ btrfsic_submit_bio(READ, sbio->bio);
}
static int scrub_add_page_to_rd_bio(struct scrub_ctx *sctx,
@@ -2178,6 +2119,122 @@ again:
return 0;
}
+static void scrub_missing_raid56_end_io(struct bio *bio)
+{
+ struct scrub_block *sblock = bio->bi_private;
+ struct btrfs_fs_info *fs_info = sblock->sctx->dev_root->fs_info;
+
+ if (bio->bi_error)
+ sblock->no_io_error_seen = 0;
+
+ btrfs_queue_work(fs_info->scrub_workers, &sblock->work);
+}
+
+static void scrub_missing_raid56_worker(struct btrfs_work *work)
+{
+ struct scrub_block *sblock = container_of(work, struct scrub_block, work);
+ struct scrub_ctx *sctx = sblock->sctx;
+ u64 logical;
+ struct btrfs_device *dev;
+
+ logical = sblock->pagev[0]->logical;
+ dev = sblock->pagev[0]->dev;
+
+ if (sblock->no_io_error_seen)
+ scrub_recheck_block_checksum(sblock);
+
+ if (!sblock->no_io_error_seen) {
+ spin_lock(&sctx->stat_lock);
+ sctx->stat.read_errors++;
+ spin_unlock(&sctx->stat_lock);
+ btrfs_err_rl_in_rcu(sctx->dev_root->fs_info,
+ "IO error rebuilding logical %llu for dev %s",
+ logical, rcu_str_deref(dev->name));
+ } else if (sblock->header_error || sblock->checksum_error) {
+ spin_lock(&sctx->stat_lock);
+ sctx->stat.uncorrectable_errors++;
+ spin_unlock(&sctx->stat_lock);
+ btrfs_err_rl_in_rcu(sctx->dev_root->fs_info,
+ "failed to rebuild valid logical %llu for dev %s",
+ logical, rcu_str_deref(dev->name));
+ } else {
+ scrub_write_block_to_dev_replace(sblock);
+ }
+
+ scrub_block_put(sblock);
+
+ if (sctx->is_dev_replace &&
+ atomic_read(&sctx->wr_ctx.flush_all_writes)) {
+ mutex_lock(&sctx->wr_ctx.wr_lock);
+ scrub_wr_submit(sctx);
+ mutex_unlock(&sctx->wr_ctx.wr_lock);
+ }
+
+ scrub_pending_bio_dec(sctx);
+}
+
+static void scrub_missing_raid56_pages(struct scrub_block *sblock)
+{
+ struct scrub_ctx *sctx = sblock->sctx;
+ struct btrfs_fs_info *fs_info = sctx->dev_root->fs_info;
+ u64 length = sblock->page_count * PAGE_SIZE;
+ u64 logical = sblock->pagev[0]->logical;
+ struct btrfs_bio *bbio;
+ struct bio *bio;
+ struct btrfs_raid_bio *rbio;
+ int ret;
+ int i;
+
+ ret = btrfs_map_sblock(fs_info, REQ_GET_READ_MIRRORS, logical, &length,
+ &bbio, 0, 1);
+ if (ret || !bbio || !bbio->raid_map)
+ goto bbio_out;
+
+ if (WARN_ON(!sctx->is_dev_replace ||
+ !(bbio->map_type & BTRFS_BLOCK_GROUP_RAID56_MASK))) {
+ /*
+ * We shouldn't be scrubbing a missing device. Even for dev
+ * replace, we should only get here for RAID 5/6. We either
+ * managed to mount something with no mirrors remaining or
+ * there's a bug in scrub_remap_extent()/btrfs_map_block().
+ */
+ goto bbio_out;
+ }
+
+ bio = btrfs_io_bio_alloc(GFP_NOFS, 0);
+ if (!bio)
+ goto bbio_out;
+
+ bio->bi_iter.bi_sector = logical >> 9;
+ bio->bi_private = sblock;
+ bio->bi_end_io = scrub_missing_raid56_end_io;
+
+ rbio = raid56_alloc_missing_rbio(sctx->dev_root, bio, bbio, length);
+ if (!rbio)
+ goto rbio_out;
+
+ for (i = 0; i < sblock->page_count; i++) {
+ struct scrub_page *spage = sblock->pagev[i];
+
+ raid56_add_scrub_pages(rbio, spage->page, spage->logical);
+ }
+
+ btrfs_init_work(&sblock->work, btrfs_scrub_helper,
+ scrub_missing_raid56_worker, NULL, NULL);
+ scrub_block_get(sblock);
+ scrub_pending_bio_inc(sctx);
+ raid56_submit_missing_rbio(rbio);
+ return;
+
+rbio_out:
+ bio_put(bio);
+bbio_out:
+ btrfs_put_bbio(bbio);
+ spin_lock(&sctx->stat_lock);
+ sctx->stat.malloc_errors++;
+ spin_unlock(&sctx->stat_lock);
+}
+
static int scrub_pages(struct scrub_ctx *sctx, u64 logical, u64 len,
u64 physical, struct btrfs_device *dev, u64 flags,
u64 gen, int mirror_num, u8 *csum, int force,
@@ -2241,31 +2298,39 @@ leave_nomem:
}
WARN_ON(sblock->page_count == 0);
- for (index = 0; index < sblock->page_count; index++) {
- struct scrub_page *spage = sblock->pagev[index];
- int ret;
+ if (dev->missing) {
+ /*
+ * This case should only be hit for RAID 5/6 device replace. See
+ * the comment in scrub_missing_raid56_pages() for details.
+ */
+ scrub_missing_raid56_pages(sblock);
+ } else {
+ for (index = 0; index < sblock->page_count; index++) {
+ struct scrub_page *spage = sblock->pagev[index];
+ int ret;
- ret = scrub_add_page_to_rd_bio(sctx, spage);
- if (ret) {
- scrub_block_put(sblock);
- return ret;
+ ret = scrub_add_page_to_rd_bio(sctx, spage);
+ if (ret) {
+ scrub_block_put(sblock);
+ return ret;
+ }
}
- }
- if (force)
- scrub_submit(sctx);
+ if (force)
+ scrub_submit(sctx);
+ }
/* last one frees, either here or in bio completion for last page */
scrub_block_put(sblock);
return 0;
}
-static void scrub_bio_end_io(struct bio *bio, int err)
+static void scrub_bio_end_io(struct bio *bio)
{
struct scrub_bio *sbio = bio->bi_private;
struct btrfs_fs_info *fs_info = sbio->dev->dev_root->fs_info;
- sbio->err = err;
+ sbio->err = bio->bi_error;
sbio->bio = bio;
btrfs_queue_work(fs_info->scrub_workers, &sbio->work);
@@ -2381,8 +2446,7 @@ static void scrub_block_complete(struct scrub_block *sblock)
}
}
-static int scrub_find_csum(struct scrub_ctx *sctx, u64 logical, u64 len,
- u8 *csum)
+static int scrub_find_csum(struct scrub_ctx *sctx, u64 logical, u8 *csum)
{
struct btrfs_ordered_sum *sum = NULL;
unsigned long index;
@@ -2446,7 +2510,7 @@ static int scrub_extent(struct scrub_ctx *sctx, u64 logical, u64 len,
if (flags & BTRFS_EXTENT_FLAG_DATA) {
/* push csums to sbio */
- have_csum = scrub_find_csum(sctx, logical, l, csum);
+ have_csum = scrub_find_csum(sctx, logical, csum);
if (have_csum == 0)
++sctx->stat.no_csum;
if (sctx->is_dev_replace && !have_csum) {
@@ -2564,6 +2628,11 @@ static int scrub_extent_for_parity(struct scrub_parity *sparity,
u8 csum[BTRFS_CSUM_SIZE];
u32 blocksize;
+ if (dev->missing) {
+ scrub_parity_mark_sectors_error(sparity, logical, len);
+ return 0;
+ }
+
if (flags & BTRFS_EXTENT_FLAG_DATA) {
blocksize = sctx->sectorsize;
} else if (flags & BTRFS_EXTENT_FLAG_TREE_BLOCK) {
@@ -2579,7 +2648,7 @@ static int scrub_extent_for_parity(struct scrub_parity *sparity,
if (flags & BTRFS_EXTENT_FLAG_DATA) {
/* push csums to sbio */
- have_csum = scrub_find_csum(sctx, logical, l, csum);
+ have_csum = scrub_find_csum(sctx, logical, csum);
if (have_csum == 0)
goto skip;
}
@@ -2662,18 +2731,30 @@ static void scrub_free_parity(struct scrub_parity *sparity)
kfree(sparity);
}
-static void scrub_parity_bio_endio(struct bio *bio, int error)
+static void scrub_parity_bio_endio_worker(struct btrfs_work *work)
{
- struct scrub_parity *sparity = (struct scrub_parity *)bio->bi_private;
+ struct scrub_parity *sparity = container_of(work, struct scrub_parity,
+ work);
struct scrub_ctx *sctx = sparity->sctx;
- if (error)
+ scrub_free_parity(sparity);
+ scrub_pending_bio_dec(sctx);
+}
+
+static void scrub_parity_bio_endio(struct bio *bio)
+{
+ struct scrub_parity *sparity = (struct scrub_parity *)bio->bi_private;
+
+ if (bio->bi_error)
bitmap_or(sparity->ebitmap, sparity->ebitmap, sparity->dbitmap,
sparity->nsectors);
- scrub_free_parity(sparity);
- scrub_pending_bio_dec(sctx);
bio_put(bio);
+
+ btrfs_init_work(&sparity->work, btrfs_scrubparity_helper,
+ scrub_parity_bio_endio_worker, NULL, NULL);
+ btrfs_queue_work(sparity->sctx->dev_root->fs_info->scrub_parity_workers,
+ &sparity->work);
}
static void scrub_parity_check_and_repair(struct scrub_parity *sparity)
@@ -2690,7 +2771,7 @@ static void scrub_parity_check_and_repair(struct scrub_parity *sparity)
sparity->nsectors))
goto out;
- length = sparity->logic_end - sparity->logic_start + 1;
+ length = sparity->logic_end - sparity->logic_start;
ret = btrfs_map_sblock(sctx->dev_root->fs_info, WRITE,
sparity->logic_start,
&length, &bbio, 0, 1);
@@ -2713,8 +2794,7 @@ static void scrub_parity_check_and_repair(struct scrub_parity *sparity)
goto rbio_out;
list_for_each_entry(spage, &sparity->spages, list)
- raid56_parity_add_scrub_pages(rbio, spage->page,
- spage->logical);
+ raid56_add_scrub_pages(rbio, spage->page, spage->logical);
scrub_pending_bio_inc(sctx);
raid56_parity_submit_scrub_rbio(rbio);
@@ -2762,6 +2842,7 @@ static noinline_for_stack int scrub_raid56_parity(struct scrub_ctx *sctx,
struct btrfs_root *root = fs_info->extent_root;
struct btrfs_root *csum_root = fs_info->csum_root;
struct btrfs_extent_item *extent;
+ struct btrfs_bio *bbio = NULL;
u64 flags;
int ret;
int slot;
@@ -2771,6 +2852,7 @@ static noinline_for_stack int scrub_raid56_parity(struct scrub_ctx *sctx,
u64 extent_logical;
u64 extent_physical;
u64 extent_len;
+ u64 mapped_length;
struct btrfs_device *extent_dev;
struct scrub_parity *sparity;
int nsectors;
@@ -2844,6 +2926,10 @@ static noinline_for_stack int scrub_raid56_parity(struct scrub_ctx *sctx,
}
btrfs_item_key_to_cpu(l, &key, slot);
+ if (key.type != BTRFS_EXTENT_ITEM_KEY &&
+ key.type != BTRFS_METADATA_ITEM_KEY)
+ goto next;
+
if (key.type == BTRFS_METADATA_ITEM_KEY)
bytes = root->nodesize;
else
@@ -2852,11 +2938,7 @@ static noinline_for_stack int scrub_raid56_parity(struct scrub_ctx *sctx,
if (key.objectid + bytes <= logic_start)
goto next;
- if (key.type != BTRFS_EXTENT_ITEM_KEY &&
- key.type != BTRFS_METADATA_ITEM_KEY)
- goto next;
-
- if (key.objectid > logic_end) {
+ if (key.objectid >= logic_end) {
stop_loop = 1;
break;
}
@@ -2869,11 +2951,15 @@ static noinline_for_stack int scrub_raid56_parity(struct scrub_ctx *sctx,
flags = btrfs_extent_flags(l, extent);
generation = btrfs_extent_generation(l, extent);
- if (key.objectid < logic_start &&
- (flags & BTRFS_EXTENT_FLAG_TREE_BLOCK)) {
- btrfs_err(fs_info,
- "scrub: tree block %llu spanning stripes, ignored. logical=%llu",
- key.objectid, logic_start);
+ if ((flags & BTRFS_EXTENT_FLAG_TREE_BLOCK) &&
+ (key.objectid < logic_start ||
+ key.objectid + bytes >
+ logic_start + map->stripe_len)) {
+ btrfs_err(fs_info, "scrub: tree block %llu spanning stripes, ignored. logical=%llu",
+ key.objectid, logic_start);
+ spin_lock(&sctx->stat_lock);
+ sctx->stat.uncorrectable_errors++;
+ spin_unlock(&sctx->stat_lock);
goto next;
}
again:
@@ -2893,10 +2979,21 @@ again:
scrub_parity_mark_sectors_data(sparity, extent_logical,
extent_len);
- scrub_remap_extent(fs_info, extent_logical,
- extent_len, &extent_physical,
- &extent_dev,
- &extent_mirror_num);
+ mapped_length = extent_len;
+ ret = btrfs_map_block(fs_info, READ, extent_logical,
+ &mapped_length, &bbio, 0);
+ if (!ret) {
+ if (!bbio || mapped_length < extent_len)
+ ret = -EIO;
+ }
+ if (ret) {
+ btrfs_put_bbio(bbio);
+ goto out;
+ }
+ extent_physical = bbio->stripes[0].physical;
+ extent_mirror_num = bbio->mirror_num;
+ extent_dev = bbio->stripes[0].dev;
+ btrfs_put_bbio(bbio);
ret = btrfs_lookup_csums_range(csum_root,
extent_logical,
@@ -2911,10 +3008,12 @@ again:
extent_dev, flags,
generation,
extent_mirror_num);
+
+ scrub_free_csums(sctx);
+
if (ret)
goto out;
- scrub_free_csums(sctx);
if (extent_logical + extent_len <
key.objectid + bytes) {
logic_start += map->stripe_len;
@@ -2943,7 +3042,7 @@ next:
out:
if (ret < 0)
scrub_parity_mark_sectors_error(sparity, logic_start,
- logic_end - logic_start + 1);
+ logic_end - logic_start);
scrub_parity_put(sparity);
scrub_submit(sctx);
mutex_lock(&sctx->wr_ctx.wr_lock);
@@ -3092,22 +3191,6 @@ static noinline_for_stack int scrub_stripe(struct scrub_ctx *sctx,
*/
ret = 0;
while (physical < physical_end) {
- /* for raid56, we skip parity stripe */
- if (map->type & BTRFS_BLOCK_GROUP_RAID56_MASK) {
- ret = get_raid56_logic_offset(physical, num,
- map, &logical, &stripe_logical);
- logical += base;
- if (ret) {
- stripe_logical += base;
- stripe_end = stripe_logical + increment - 1;
- ret = scrub_raid56_parity(sctx, map, scrub_dev,
- ppath, stripe_logical,
- stripe_end);
- if (ret)
- goto out;
- goto skip;
- }
- }
/*
* canceled?
*/
@@ -3132,6 +3215,24 @@ static noinline_for_stack int scrub_stripe(struct scrub_ctx *sctx,
scrub_blocked_if_needed(fs_info);
}
+ if (map->type & BTRFS_BLOCK_GROUP_RAID56_MASK) {
+ ret = get_raid56_logic_offset(physical, num, map,
+ &logical,
+ &stripe_logical);
+ logical += base;
+ if (ret) {
+ /* it is parity strip */
+ stripe_logical += base;
+ stripe_end = stripe_logical + increment;
+ ret = scrub_raid56_parity(sctx, map, scrub_dev,
+ ppath, stripe_logical,
+ stripe_end);
+ if (ret)
+ goto out;
+ goto skip;
+ }
+ }
+
if (btrfs_fs_incompat(fs_info, SKINNY_METADATA))
key.type = BTRFS_METADATA_ITEM_KEY;
else
@@ -3176,6 +3277,10 @@ static noinline_for_stack int scrub_stripe(struct scrub_ctx *sctx,
}
btrfs_item_key_to_cpu(l, &key, slot);
+ if (key.type != BTRFS_EXTENT_ITEM_KEY &&
+ key.type != BTRFS_METADATA_ITEM_KEY)
+ goto next;
+
if (key.type == BTRFS_METADATA_ITEM_KEY)
bytes = root->nodesize;
else
@@ -3184,10 +3289,6 @@ static noinline_for_stack int scrub_stripe(struct scrub_ctx *sctx,
if (key.objectid + bytes <= logical)
goto next;
- if (key.type != BTRFS_EXTENT_ITEM_KEY &&
- key.type != BTRFS_METADATA_ITEM_KEY)
- goto next;
-
if (key.objectid >= logical + map->stripe_len) {
/* out of this device extent */
if (key.objectid >= logic_end)
@@ -3200,12 +3301,17 @@ static noinline_for_stack int scrub_stripe(struct scrub_ctx *sctx,
flags = btrfs_extent_flags(l, extent);
generation = btrfs_extent_generation(l, extent);
- if (key.objectid < logical &&
- (flags & BTRFS_EXTENT_FLAG_TREE_BLOCK)) {
+ if ((flags & BTRFS_EXTENT_FLAG_TREE_BLOCK) &&
+ (key.objectid < logical ||
+ key.objectid + bytes >
+ logical + map->stripe_len)) {
btrfs_err(fs_info,
"scrub: tree block %llu spanning "
"stripes, ignored. logical=%llu",
key.objectid, logical);
+ spin_lock(&sctx->stat_lock);
+ sctx->stat.uncorrectable_errors++;
+ spin_unlock(&sctx->stat_lock);
goto next;
}
@@ -3235,9 +3341,11 @@ again:
&extent_dev,
&extent_mirror_num);
- ret = btrfs_lookup_csums_range(csum_root, logical,
- logical + map->stripe_len - 1,
- &sctx->csum_list, 1);
+ ret = btrfs_lookup_csums_range(csum_root,
+ extent_logical,
+ extent_logical +
+ extent_len - 1,
+ &sctx->csum_list, 1);
if (ret)
goto out;
@@ -3245,10 +3353,12 @@ again:
extent_physical, extent_dev, flags,
generation, extent_mirror_num,
extent_logical - logical + physical);
+
+ scrub_free_csums(sctx);
+
if (ret)
goto out;
- scrub_free_csums(sctx);
if (extent_logical + extent_len <
key.objectid + bytes) {
if (map->type & BTRFS_BLOCK_GROUP_RAID56_MASK) {
@@ -3266,7 +3376,7 @@ loop:
if (ret && physical < physical_end) {
stripe_logical += base;
stripe_end = stripe_logical +
- increment - 1;
+ increment;
ret = scrub_raid56_parity(sctx,
map, scrub_dev, ppath,
stripe_logical,
@@ -3321,9 +3431,10 @@ out:
static noinline_for_stack int scrub_chunk(struct scrub_ctx *sctx,
struct btrfs_device *scrub_dev,
- u64 chunk_tree, u64 chunk_objectid,
u64 chunk_offset, u64 length,
- u64 dev_offset, int is_dev_replace)
+ u64 dev_offset,
+ struct btrfs_block_group_cache *cache,
+ int is_dev_replace)
{
struct btrfs_mapping_tree *map_tree =
&sctx->dev_root->fs_info->mapping_tree;
@@ -3336,8 +3447,18 @@ static noinline_for_stack int scrub_chunk(struct scrub_ctx *sctx,
em = lookup_extent_mapping(&map_tree->map_tree, chunk_offset, 1);
read_unlock(&map_tree->map_tree.lock);
- if (!em)
- return -EINVAL;
+ if (!em) {
+ /*
+ * Might have been an unused block group deleted by the cleaner
+ * kthread or relocation.
+ */
+ spin_lock(&cache->lock);
+ if (!cache->removed)
+ ret = -EINVAL;
+ spin_unlock(&cache->lock);
+
+ return ret;
+ }
map = (struct map_lookup *)em->bdev;
if (em->start != chunk_offset)
@@ -3372,10 +3493,9 @@ int scrub_enumerate_chunks(struct scrub_ctx *sctx,
struct btrfs_root *root = sctx->dev_root;
struct btrfs_fs_info *fs_info = root->fs_info;
u64 length;
- u64 chunk_tree;
- u64 chunk_objectid;
u64 chunk_offset;
- int ret;
+ int ret = 0;
+ int ro_set;
int slot;
struct extent_buffer *l;
struct btrfs_key key;
@@ -3403,8 +3523,14 @@ int scrub_enumerate_chunks(struct scrub_ctx *sctx,
if (path->slots[0] >=
btrfs_header_nritems(path->nodes[0])) {
ret = btrfs_next_leaf(root, path);
- if (ret)
+ if (ret < 0)
break;
+ if (ret > 0) {
+ ret = 0;
+ break;
+ }
+ } else {
+ ret = 0;
}
}
@@ -3431,8 +3557,6 @@ int scrub_enumerate_chunks(struct scrub_ctx *sctx,
if (found_key.offset + length <= start)
goto skip;
- chunk_tree = btrfs_dev_extent_chunk_tree(l, dev_extent);
- chunk_objectid = btrfs_dev_extent_chunk_objectid(l, dev_extent);
chunk_offset = btrfs_dev_extent_chunk_offset(l, dev_extent);
/*
@@ -3446,12 +3570,41 @@ int scrub_enumerate_chunks(struct scrub_ctx *sctx,
if (!cache)
goto skip;
+ /*
+ * we need call btrfs_inc_block_group_ro() with scrubs_paused,
+ * to avoid deadlock caused by:
+ * btrfs_inc_block_group_ro()
+ * -> btrfs_wait_for_commit()
+ * -> btrfs_commit_transaction()
+ * -> btrfs_scrub_pause()
+ */
+ scrub_pause_on(fs_info);
+ ret = btrfs_inc_block_group_ro(root, cache);
+ scrub_pause_off(fs_info);
+
+ if (ret == 0) {
+ ro_set = 1;
+ } else if (ret == -ENOSPC) {
+ /*
+ * btrfs_inc_block_group_ro return -ENOSPC when it
+ * failed in creating new chunk for metadata.
+ * It is not a problem for scrub/replace, because
+ * metadata are always cowed, and our scrub paused
+ * commit_transactions.
+ */
+ ro_set = 0;
+ } else {
+ btrfs_warn(fs_info, "failed setting block group ro, ret=%d\n",
+ ret);
+ btrfs_put_block_group(cache);
+ break;
+ }
+
dev_replace->cursor_right = found_key.offset + length;
dev_replace->cursor_left = found_key.offset;
dev_replace->item_needs_writeback = 1;
- ret = scrub_chunk(sctx, scrub_dev, chunk_tree, chunk_objectid,
- chunk_offset, length, found_key.offset,
- is_dev_replace);
+ ret = scrub_chunk(sctx, scrub_dev, chunk_offset, length,
+ found_key.offset, cache, is_dev_replace);
/*
* flush, submit all pending read and write bios, afterwards
@@ -3471,8 +3624,8 @@ int scrub_enumerate_chunks(struct scrub_ctx *sctx,
wait_event(sctx->list_wait,
atomic_read(&sctx->bios_in_flight) == 0);
- atomic_inc(&fs_info->scrubs_paused);
- wake_up(&fs_info->scrub_pause_wait);
+
+ scrub_pause_on(fs_info);
/*
* must be called before we decrease @scrub_paused.
@@ -3483,11 +3636,32 @@ int scrub_enumerate_chunks(struct scrub_ctx *sctx,
atomic_read(&sctx->workers_pending) == 0);
atomic_set(&sctx->wr_ctx.flush_all_writes, 0);
- mutex_lock(&fs_info->scrub_lock);
- __scrub_blocked_if_needed(fs_info);
- atomic_dec(&fs_info->scrubs_paused);
- mutex_unlock(&fs_info->scrub_lock);
- wake_up(&fs_info->scrub_pause_wait);
+ scrub_pause_off(fs_info);
+
+ if (ro_set)
+ btrfs_dec_block_group_ro(root, cache);
+
+ /*
+ * We might have prevented the cleaner kthread from deleting
+ * this block group if it was already unused because we raced
+ * and set it to RO mode first. So add it back to the unused
+ * list, otherwise it might not ever be deleted unless a manual
+ * balance is triggered or it becomes used and unused again.
+ */
+ spin_lock(&cache->lock);
+ if (!cache->removed && !cache->ro && cache->reserved == 0 &&
+ btrfs_block_group_used(&cache->item) == 0) {
+ spin_unlock(&cache->lock);
+ spin_lock(&fs_info->unused_bgs_lock);
+ if (list_empty(&cache->bg_list)) {
+ btrfs_get_block_group(cache);
+ list_add_tail(&cache->bg_list,
+ &fs_info->unused_bgs);
+ }
+ spin_unlock(&fs_info->unused_bgs_lock);
+ } else {
+ spin_unlock(&cache->lock);
+ }
btrfs_put_block_group(cache);
if (ret)
@@ -3511,11 +3685,7 @@ skip:
btrfs_free_path(path);
- /*
- * ret can still be 1 from search_slot or next_leaf,
- * that's not an error
- */
- return ret < 0 ? ret : 0;
+ return ret;
}
static noinline_for_stack int scrub_supers(struct scrub_ctx *sctx,
@@ -3559,7 +3729,6 @@ static noinline_for_stack int scrub_supers(struct scrub_ctx *sctx,
static noinline_for_stack int scrub_workers_get(struct btrfs_fs_info *fs_info,
int is_dev_replace)
{
- int ret = 0;
unsigned int flags = WQ_FREEZABLE | WQ_UNBOUND;
int max_active = fs_info->thread_pool_size;
@@ -3572,27 +3741,36 @@ static noinline_for_stack int scrub_workers_get(struct btrfs_fs_info *fs_info,
fs_info->scrub_workers =
btrfs_alloc_workqueue("btrfs-scrub", flags,
max_active, 4);
- if (!fs_info->scrub_workers) {
- ret = -ENOMEM;
- goto out;
- }
+ if (!fs_info->scrub_workers)
+ goto fail_scrub_workers;
+
fs_info->scrub_wr_completion_workers =
btrfs_alloc_workqueue("btrfs-scrubwrc", flags,
max_active, 2);
- if (!fs_info->scrub_wr_completion_workers) {
- ret = -ENOMEM;
- goto out;
- }
+ if (!fs_info->scrub_wr_completion_workers)
+ goto fail_scrub_wr_completion_workers;
+
fs_info->scrub_nocow_workers =
btrfs_alloc_workqueue("btrfs-scrubnc", flags, 1, 0);
- if (!fs_info->scrub_nocow_workers) {
- ret = -ENOMEM;
- goto out;
- }
+ if (!fs_info->scrub_nocow_workers)
+ goto fail_scrub_nocow_workers;
+ fs_info->scrub_parity_workers =
+ btrfs_alloc_workqueue("btrfs-scrubparity", flags,
+ max_active, 2);
+ if (!fs_info->scrub_parity_workers)
+ goto fail_scrub_parity_workers;
}
++fs_info->scrub_workers_refcnt;
-out:
- return ret;
+ return 0;
+
+fail_scrub_parity_workers:
+ btrfs_destroy_workqueue(fs_info->scrub_nocow_workers);
+fail_scrub_nocow_workers:
+ btrfs_destroy_workqueue(fs_info->scrub_wr_completion_workers);
+fail_scrub_wr_completion_workers:
+ btrfs_destroy_workqueue(fs_info->scrub_workers);
+fail_scrub_workers:
+ return -ENOMEM;
}
static noinline_for_stack void scrub_workers_put(struct btrfs_fs_info *fs_info)
@@ -3601,6 +3779,7 @@ static noinline_for_stack void scrub_workers_put(struct btrfs_fs_info *fs_info)
btrfs_destroy_workqueue(fs_info->scrub_workers);
btrfs_destroy_workqueue(fs_info->scrub_wr_completion_workers);
btrfs_destroy_workqueue(fs_info->scrub_nocow_workers);
+ btrfs_destroy_workqueue(fs_info->scrub_parity_workers);
}
WARN_ON(fs_info->scrub_workers_refcnt < 0);
}
@@ -3875,8 +4054,7 @@ static int scrub_setup_wr_ctx(struct scrub_ctx *sctx,
return 0;
WARN_ON(!dev->bdev);
- wr_ctx->pages_per_wr_bio = min_t(int, SCRUB_PAGES_PER_WR_BIO,
- bio_get_nr_vecs(dev->bdev));
+ wr_ctx->pages_per_wr_bio = SCRUB_PAGES_PER_WR_BIO;
wr_ctx->tgtdev = dev;
atomic_set(&wr_ctx->flush_all_writes, 0);
return 0;
@@ -4198,8 +4376,8 @@ static int write_page_nocow(struct scrub_ctx *sctx,
if (!dev)
return -EIO;
if (!dev->bdev) {
- printk_ratelimited(KERN_WARNING
- "BTRFS: scrub write_page_nocow(bdev == NULL) is unexpected!\n");
+ btrfs_warn_rl(dev->dev_root->fs_info,
+ "scrub write_page_nocow(bdev == NULL) is unexpected");
return -EIO;
}
bio = btrfs_io_bio_alloc(GFP_NOFS, 1);
diff --git a/kernel/fs/btrfs/send.c b/kernel/fs/btrfs/send.c
index a1216f9b4..63a6152be 100644
--- a/kernel/fs/btrfs/send.c
+++ b/kernel/fs/btrfs/send.c
@@ -243,6 +243,7 @@ struct waiting_dir_move {
* after this directory is moved, we can try to rmdir the ino rmdir_ino.
*/
u64 rmdir_ino;
+ bool orphanized;
};
struct orphan_dir_info {
@@ -1158,6 +1159,9 @@ struct backref_ctx {
/* may be truncated in case it's the last extent in a file */
u64 extent_len;
+ /* data offset in the file extent item */
+ u64 data_offset;
+
/* Just to check for bugs in backref resolving */
int found_itself;
};
@@ -1221,7 +1225,7 @@ static int __iterate_backrefs(u64 ino, u64 offset, u64 root, void *ctx_)
if (ret < 0)
return ret;
- if (offset + bctx->extent_len > i_size)
+ if (offset + bctx->data_offset + bctx->extent_len > i_size)
return 0;
/*
@@ -1363,6 +1367,19 @@ static int find_extent_clone(struct send_ctx *sctx,
backref_ctx->cur_offset = data_offset;
backref_ctx->found_itself = 0;
backref_ctx->extent_len = num_bytes;
+ /*
+ * For non-compressed extents iterate_extent_inodes() gives us extent
+ * offsets that already take into account the data offset, but not for
+ * compressed extents, since the offset is logical and not relative to
+ * the physical extent locations. We must take this into account to
+ * avoid sending clone offsets that go beyond the source file's size,
+ * which would result in the clone ioctl failing with -EINVAL on the
+ * receiving end.
+ */
+ if (compressed == BTRFS_COMPRESS_NONE)
+ backref_ctx->data_offset = 0;
+ else
+ backref_ctx->data_offset = btrfs_file_extent_offset(eb, fi);
/*
* The last extent of a file may be too large due to page alignment.
@@ -1417,16 +1434,6 @@ verbose_printk(KERN_DEBUG "btrfs: find_extent_clone: data_offset=%llu, "
}
if (cur_clone_root) {
- if (compressed != BTRFS_COMPRESS_NONE) {
- /*
- * Offsets given by iterate_extent_inodes() are relative
- * to the start of the extent, we need to add logical
- * offset from the file extent item.
- * (See why at backref.c:check_extent_in_eb())
- */
- cur_clone_root->offset += btrfs_file_extent_offset(eb,
- fi);
- }
*found = cur_clone_root;
ret = 0;
} else {
@@ -1462,7 +1469,21 @@ static int read_symlink(struct btrfs_root *root,
ret = btrfs_search_slot(NULL, root, &key, path, 0, 0);
if (ret < 0)
goto out;
- BUG_ON(ret);
+ if (ret) {
+ /*
+ * An empty symlink inode. Can happen in rare error paths when
+ * creating a symlink (transaction committed before the inode
+ * eviction handler removed the symlink inode items and a crash
+ * happened in between or the subvol was snapshoted in between).
+ * Print an informative message to dmesg/syslog so that the user
+ * can delete the symlink.
+ */
+ btrfs_err(root->fs_info,
+ "Found empty symlink inode %llu at root %llu",
+ ino, root->root_key.objectid);
+ ret = -EIO;
+ goto out;
+ }
ei = btrfs_item_ptr(path->nodes[0], path->slots[0],
struct btrfs_file_extent_item);
@@ -1900,8 +1921,15 @@ static int did_overwrite_ref(struct send_ctx *sctx,
goto out;
}
- /* we know that it is or will be overwritten. check this now */
- if (ow_inode < sctx->send_progress)
+ /*
+ * We know that it is or will be overwritten. Check this now.
+ * The current inode being processed might have been the one that caused
+ * inode 'ino' to be orphanized, therefore check if ow_inode matches
+ * the current inode being processed.
+ */
+ if ((ow_inode < sctx->send_progress) ||
+ (ino != sctx->cur_ino && ow_inode == sctx->cur_ino &&
+ gen == sctx->cur_inode_gen))
ret = 1;
else
ret = 0;
@@ -2223,6 +2251,8 @@ static int get_cur_path(struct send_ctx *sctx, u64 ino, u64 gen,
fs_path_reset(dest);
while (!stop && ino != BTRFS_FIRST_FREE_OBJECTID) {
+ struct waiting_dir_move *wdm;
+
fs_path_reset(name);
if (is_waiting_for_rm(sctx, ino)) {
@@ -2233,7 +2263,11 @@ static int get_cur_path(struct send_ctx *sctx, u64 ino, u64 gen,
break;
}
- if (is_waiting_for_move(sctx, ino)) {
+ wdm = get_waiting_dir_move(sctx, ino);
+ if (wdm && wdm->orphanized) {
+ ret = gen_unique_name(sctx, ino, gen, name);
+ stop = 1;
+ } else if (wdm) {
ret = get_first_ref(sctx->parent_root, ino,
&parent_inode, &parent_gen, name);
} else {
@@ -2323,13 +2357,23 @@ static int send_subvol_begin(struct send_ctx *sctx)
}
TLV_PUT_STRING(sctx, BTRFS_SEND_A_PATH, name, namelen);
- TLV_PUT_UUID(sctx, BTRFS_SEND_A_UUID,
- sctx->send_root->root_item.uuid);
+
+ if (!btrfs_is_empty_uuid(sctx->send_root->root_item.received_uuid))
+ TLV_PUT_UUID(sctx, BTRFS_SEND_A_UUID,
+ sctx->send_root->root_item.received_uuid);
+ else
+ TLV_PUT_UUID(sctx, BTRFS_SEND_A_UUID,
+ sctx->send_root->root_item.uuid);
+
TLV_PUT_U64(sctx, BTRFS_SEND_A_CTRANSID,
le64_to_cpu(sctx->send_root->root_item.ctransid));
if (parent_root) {
- TLV_PUT_UUID(sctx, BTRFS_SEND_A_CLONE_UUID,
- sctx->parent_root->root_item.uuid);
+ if (!btrfs_is_empty_uuid(parent_root->root_item.received_uuid))
+ TLV_PUT_UUID(sctx, BTRFS_SEND_A_CLONE_UUID,
+ parent_root->root_item.received_uuid);
+ else
+ TLV_PUT_UUID(sctx, BTRFS_SEND_A_CLONE_UUID,
+ parent_root->root_item.uuid);
TLV_PUT_U64(sctx, BTRFS_SEND_A_CLONE_CTRANSID,
le64_to_cpu(sctx->parent_root->root_item.ctransid));
}
@@ -2530,7 +2574,7 @@ verbose_printk("btrfs: send_create_inode %llu\n", ino);
} else if (S_ISSOCK(mode)) {
cmd = BTRFS_SEND_C_MKSOCK;
} else {
- printk(KERN_WARNING "btrfs: unexpected inode type %o",
+ btrfs_warn(sctx->send_root->fs_info, "unexpected inode type %o",
(int)(mode & S_IFMT));
ret = -ENOTSUPP;
goto out;
@@ -2923,7 +2967,7 @@ static int is_waiting_for_move(struct send_ctx *sctx, u64 ino)
return entry != NULL;
}
-static int add_waiting_dir_move(struct send_ctx *sctx, u64 ino)
+static int add_waiting_dir_move(struct send_ctx *sctx, u64 ino, bool orphanized)
{
struct rb_node **p = &sctx->waiting_dir_moves.rb_node;
struct rb_node *parent = NULL;
@@ -2934,6 +2978,7 @@ static int add_waiting_dir_move(struct send_ctx *sctx, u64 ino)
return -ENOMEM;
dm->ino = ino;
dm->rmdir_ino = 0;
+ dm->orphanized = orphanized;
while (*p) {
parent = *p;
@@ -3030,7 +3075,7 @@ static int add_pending_dir_move(struct send_ctx *sctx,
goto out;
}
- ret = add_waiting_dir_move(sctx, pm->ino);
+ ret = add_waiting_dir_move(sctx, pm->ino, is_orphan);
if (ret)
goto out;
@@ -3353,8 +3398,40 @@ out:
return ret;
}
+/*
+ * Check if ino ino1 is an ancestor of inode ino2 in the given root.
+ * Return 1 if true, 0 if false and < 0 on error.
+ */
+static int is_ancestor(struct btrfs_root *root,
+ const u64 ino1,
+ const u64 ino1_gen,
+ const u64 ino2,
+ struct fs_path *fs_path)
+{
+ u64 ino = ino2;
+
+ while (ino > BTRFS_FIRST_FREE_OBJECTID) {
+ int ret;
+ u64 parent;
+ u64 parent_gen;
+
+ fs_path_reset(fs_path);
+ ret = get_first_ref(root, ino, &parent, &parent_gen, fs_path);
+ if (ret < 0) {
+ if (ret == -ENOENT && ino == ino2)
+ ret = 0;
+ return ret;
+ }
+ if (parent == ino1)
+ return parent_gen == ino1_gen ? 1 : 0;
+ ino = parent;
+ }
+ return 0;
+}
+
static int wait_for_parent_move(struct send_ctx *sctx,
- struct recorded_ref *parent_ref)
+ struct recorded_ref *parent_ref,
+ const bool is_orphan)
{
int ret = 0;
u64 ino = parent_ref->dir;
@@ -3374,11 +3451,24 @@ static int wait_for_parent_move(struct send_ctx *sctx,
* Our current directory inode may not yet be renamed/moved because some
* ancestor (immediate or not) has to be renamed/moved first. So find if
* such ancestor exists and make sure our own rename/move happens after
- * that ancestor is processed.
+ * that ancestor is processed to avoid path build infinite loops (done
+ * at get_cur_path()).
*/
while (ino > BTRFS_FIRST_FREE_OBJECTID) {
if (is_waiting_for_move(sctx, ino)) {
- ret = 1;
+ /*
+ * If the current inode is an ancestor of ino in the
+ * parent root, we need to delay the rename of the
+ * current inode, otherwise don't delayed the rename
+ * because we can end up with a circular dependency
+ * of renames, resulting in some directories never
+ * getting the respective rename operations issued in
+ * the send stream or getting into infinite path build
+ * loops.
+ */
+ ret = is_ancestor(sctx->parent_root,
+ sctx->cur_ino, sctx->cur_inode_gen,
+ ino, path_before);
break;
}
@@ -3420,7 +3510,7 @@ out:
ino,
&sctx->new_refs,
&sctx->deleted_refs,
- false);
+ is_orphan);
if (!ret)
ret = 1;
}
@@ -3589,6 +3679,17 @@ verbose_printk("btrfs: process_recorded_refs %llu\n", sctx->cur_ino);
}
}
+ if (S_ISDIR(sctx->cur_inode_mode) && sctx->parent_root &&
+ can_rename) {
+ ret = wait_for_parent_move(sctx, cur, is_orphan);
+ if (ret < 0)
+ goto out;
+ if (ret == 1) {
+ can_rename = false;
+ *pending_move = 1;
+ }
+ }
+
/*
* link/move the ref to the new place. If we have an orphan
* inode, move it and update valid_path. If not, link or move
@@ -3609,18 +3710,11 @@ verbose_printk("btrfs: process_recorded_refs %llu\n", sctx->cur_ino);
* dirs, we always have one new and one deleted
* ref. The deleted ref is ignored later.
*/
- ret = wait_for_parent_move(sctx, cur);
- if (ret < 0)
- goto out;
- if (ret) {
- *pending_move = 1;
- } else {
- ret = send_rename(sctx, valid_path,
- cur->full_path);
- if (!ret)
- ret = fs_path_copy(valid_path,
- cur->full_path);
- }
+ ret = send_rename(sctx, valid_path,
+ cur->full_path);
+ if (!ret)
+ ret = fs_path_copy(valid_path,
+ cur->full_path);
if (ret < 0)
goto out;
} else {
@@ -4508,8 +4602,21 @@ verbose_printk("btrfs: send_clone offset=%llu, len=%d, clone_root=%llu, "
if (ret < 0)
goto out;
- TLV_PUT_UUID(sctx, BTRFS_SEND_A_CLONE_UUID,
- clone_root->root->root_item.uuid);
+ /*
+ * If the parent we're using has a received_uuid set then use that as
+ * our clone source as that is what we will look for when doing a
+ * receive.
+ *
+ * This covers the case that we create a snapshot off of a received
+ * subvolume and then use that as the parent and try to receive on a
+ * different host.
+ */
+ if (!btrfs_is_empty_uuid(clone_root->root->root_item.received_uuid))
+ TLV_PUT_UUID(sctx, BTRFS_SEND_A_CLONE_UUID,
+ clone_root->root->root_item.received_uuid);
+ else
+ TLV_PUT_UUID(sctx, BTRFS_SEND_A_CLONE_UUID,
+ clone_root->root->root_item.uuid);
TLV_PUT_U64(sctx, BTRFS_SEND_A_CLONE_CTRANSID,
le64_to_cpu(clone_root->root->root_item.ctransid));
TLV_PUT_PATH(sctx, BTRFS_SEND_A_CLONE_PATH, p);
@@ -4590,6 +4697,171 @@ tlv_put_failure:
return ret;
}
+static int send_extent_data(struct send_ctx *sctx,
+ const u64 offset,
+ const u64 len)
+{
+ u64 sent = 0;
+
+ if (sctx->flags & BTRFS_SEND_FLAG_NO_FILE_DATA)
+ return send_update_extent(sctx, offset, len);
+
+ while (sent < len) {
+ u64 size = len - sent;
+ int ret;
+
+ if (size > BTRFS_SEND_READ_SIZE)
+ size = BTRFS_SEND_READ_SIZE;
+ ret = send_write(sctx, offset + sent, size);
+ if (ret < 0)
+ return ret;
+ if (!ret)
+ break;
+ sent += ret;
+ }
+ return 0;
+}
+
+static int clone_range(struct send_ctx *sctx,
+ struct clone_root *clone_root,
+ const u64 disk_byte,
+ u64 data_offset,
+ u64 offset,
+ u64 len)
+{
+ struct btrfs_path *path;
+ struct btrfs_key key;
+ int ret;
+
+ path = alloc_path_for_send();
+ if (!path)
+ return -ENOMEM;
+
+ /*
+ * We can't send a clone operation for the entire range if we find
+ * extent items in the respective range in the source file that
+ * refer to different extents or if we find holes.
+ * So check for that and do a mix of clone and regular write/copy
+ * operations if needed.
+ *
+ * Example:
+ *
+ * mkfs.btrfs -f /dev/sda
+ * mount /dev/sda /mnt
+ * xfs_io -f -c "pwrite -S 0xaa 0K 100K" /mnt/foo
+ * cp --reflink=always /mnt/foo /mnt/bar
+ * xfs_io -c "pwrite -S 0xbb 50K 50K" /mnt/foo
+ * btrfs subvolume snapshot -r /mnt /mnt/snap
+ *
+ * If when we send the snapshot and we are processing file bar (which
+ * has a higher inode number than foo) we blindly send a clone operation
+ * for the [0, 100K[ range from foo to bar, the receiver ends up getting
+ * a file bar that matches the content of file foo - iow, doesn't match
+ * the content from bar in the original filesystem.
+ */
+ key.objectid = clone_root->ino;
+ key.type = BTRFS_EXTENT_DATA_KEY;
+ key.offset = clone_root->offset;
+ ret = btrfs_search_slot(NULL, clone_root->root, &key, path, 0, 0);
+ if (ret < 0)
+ goto out;
+ if (ret > 0 && path->slots[0] > 0) {
+ btrfs_item_key_to_cpu(path->nodes[0], &key, path->slots[0] - 1);
+ if (key.objectid == clone_root->ino &&
+ key.type == BTRFS_EXTENT_DATA_KEY)
+ path->slots[0]--;
+ }
+
+ while (true) {
+ struct extent_buffer *leaf = path->nodes[0];
+ int slot = path->slots[0];
+ struct btrfs_file_extent_item *ei;
+ u8 type;
+ u64 ext_len;
+ u64 clone_len;
+
+ if (slot >= btrfs_header_nritems(leaf)) {
+ ret = btrfs_next_leaf(clone_root->root, path);
+ if (ret < 0)
+ goto out;
+ else if (ret > 0)
+ break;
+ continue;
+ }
+
+ btrfs_item_key_to_cpu(leaf, &key, slot);
+
+ /*
+ * We might have an implicit trailing hole (NO_HOLES feature
+ * enabled). We deal with it after leaving this loop.
+ */
+ if (key.objectid != clone_root->ino ||
+ key.type != BTRFS_EXTENT_DATA_KEY)
+ break;
+
+ ei = btrfs_item_ptr(leaf, slot, struct btrfs_file_extent_item);
+ type = btrfs_file_extent_type(leaf, ei);
+ if (type == BTRFS_FILE_EXTENT_INLINE) {
+ ext_len = btrfs_file_extent_inline_len(leaf, slot, ei);
+ ext_len = PAGE_CACHE_ALIGN(ext_len);
+ } else {
+ ext_len = btrfs_file_extent_num_bytes(leaf, ei);
+ }
+
+ if (key.offset + ext_len <= clone_root->offset)
+ goto next;
+
+ if (key.offset > clone_root->offset) {
+ /* Implicit hole, NO_HOLES feature enabled. */
+ u64 hole_len = key.offset - clone_root->offset;
+
+ if (hole_len > len)
+ hole_len = len;
+ ret = send_extent_data(sctx, offset, hole_len);
+ if (ret < 0)
+ goto out;
+
+ len -= hole_len;
+ if (len == 0)
+ break;
+ offset += hole_len;
+ clone_root->offset += hole_len;
+ data_offset += hole_len;
+ }
+
+ if (key.offset >= clone_root->offset + len)
+ break;
+
+ clone_len = min_t(u64, ext_len, len);
+
+ if (btrfs_file_extent_disk_bytenr(leaf, ei) == disk_byte &&
+ btrfs_file_extent_offset(leaf, ei) == data_offset)
+ ret = send_clone(sctx, offset, clone_len, clone_root);
+ else
+ ret = send_extent_data(sctx, offset, clone_len);
+
+ if (ret < 0)
+ goto out;
+
+ len -= clone_len;
+ if (len == 0)
+ break;
+ offset += clone_len;
+ clone_root->offset += clone_len;
+ data_offset += clone_len;
+next:
+ path->slots[0]++;
+ }
+
+ if (len > 0)
+ ret = send_extent_data(sctx, offset, len);
+ else
+ ret = 0;
+out:
+ btrfs_free_path(path);
+ return ret;
+}
+
static int send_write_or_clone(struct send_ctx *sctx,
struct btrfs_path *path,
struct btrfs_key *key,
@@ -4598,9 +4870,7 @@ static int send_write_or_clone(struct send_ctx *sctx,
int ret = 0;
struct btrfs_file_extent_item *ei;
u64 offset = key->offset;
- u64 pos = 0;
u64 len;
- u32 l;
u8 type;
u64 bs = sctx->send_root->fs_info->sb->s_blocksize;
@@ -4628,22 +4898,15 @@ static int send_write_or_clone(struct send_ctx *sctx,
}
if (clone_root && IS_ALIGNED(offset + len, bs)) {
- ret = send_clone(sctx, offset, len, clone_root);
- } else if (sctx->flags & BTRFS_SEND_FLAG_NO_FILE_DATA) {
- ret = send_update_extent(sctx, offset, len);
+ u64 disk_byte;
+ u64 data_offset;
+
+ disk_byte = btrfs_file_extent_disk_bytenr(path->nodes[0], ei);
+ data_offset = btrfs_file_extent_offset(path->nodes[0], ei);
+ ret = clone_range(sctx, clone_root, disk_byte, data_offset,
+ offset, len);
} else {
- while (pos < len) {
- l = len - pos;
- if (l > BTRFS_SEND_READ_SIZE)
- l = BTRFS_SEND_READ_SIZE;
- ret = send_write(sctx, pos + offset, l);
- if (ret < 0)
- goto out;
- if (!ret)
- break;
- pos += ret;
- }
- ret = 0;
+ ret = send_extent_data(sctx, offset, len);
}
out:
return ret;
diff --git a/kernel/fs/btrfs/super.c b/kernel/fs/btrfs/super.c
index 9e66f5e72..fe609b81d 100644
--- a/kernel/fs/btrfs/super.c
+++ b/kernel/fs/btrfs/super.c
@@ -69,7 +69,7 @@ static struct file_system_type btrfs_fs_type;
static int btrfs_remount(struct super_block *sb, int *flags, char *data);
-static const char *btrfs_decode_error(int errno)
+const char *btrfs_decode_error(int errno)
{
char *errstr = "unknown";
@@ -130,16 +130,18 @@ static void btrfs_handle_error(struct btrfs_fs_info *fs_info)
}
}
-#ifdef CONFIG_PRINTK
/*
* __btrfs_std_error decodes expected errors from the caller and
* invokes the approciate error response.
*/
+__cold
void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function,
unsigned int line, int errno, const char *fmt, ...)
{
struct super_block *sb = fs_info->sb;
+#ifdef CONFIG_PRINTK
const char *errstr;
+#endif
/*
* Special case: if the error is EROFS, and we're already
@@ -148,6 +150,7 @@ void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function,
if (errno == -EROFS && (sb->s_flags & MS_RDONLY))
return;
+#ifdef CONFIG_PRINTK
errstr = btrfs_decode_error(errno);
if (fmt) {
struct va_format vaf;
@@ -165,6 +168,7 @@ void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function,
printk(KERN_CRIT "BTRFS: error (device %s) in %s:%d: errno=%d %s\n",
sb->s_id, function, line, errno, errstr);
}
+#endif
/* Don't go through full error handling during mount */
save_error_info(fs_info);
@@ -172,6 +176,7 @@ void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function,
btrfs_handle_error(fs_info);
}
+#ifdef CONFIG_PRINTK
static const char * const logtypes[] = {
"emergency",
"alert",
@@ -211,27 +216,6 @@ void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
va_end(args);
}
-
-#else
-
-void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function,
- unsigned int line, int errno, const char *fmt, ...)
-{
- struct super_block *sb = fs_info->sb;
-
- /*
- * Special case: if the error is EROFS, and we're already
- * under MS_RDONLY, then it is safe here.
- */
- if (errno == -EROFS && (sb->s_flags & MS_RDONLY))
- return;
-
- /* Don't go through full error handling during mount */
- if (sb->s_flags & MS_BORN) {
- save_error_info(fs_info);
- btrfs_handle_error(fs_info);
- }
-}
#endif
/*
@@ -247,18 +231,11 @@ void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function,
* We'll complete the cleanup in btrfs_end_transaction and
* btrfs_commit_transaction.
*/
+__cold
void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
struct btrfs_root *root, const char *function,
unsigned int line, int errno)
{
- /*
- * Report first abort since mount
- */
- if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED,
- &root->fs_info->fs_state)) {
- WARN(1, KERN_DEBUG "BTRFS: Transaction aborted (error %d)\n",
- errno);
- }
trans->aborted = errno;
/* Nothing used. The other threads that have joined this
* transaction may be able to continue. */
@@ -281,6 +258,7 @@ void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
* __btrfs_panic decodes unexpected, fatal errors from the caller,
* issues an alert, and either panics or BUGs, depending on mount options.
*/
+__cold
void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
unsigned int line, int errno, const char *fmt, ...)
{
@@ -325,6 +303,9 @@ enum {
Opt_commit_interval, Opt_barrier, Opt_nodefrag, Opt_nodiscard,
Opt_noenospc_debug, Opt_noflushoncommit, Opt_acl, Opt_datacow,
Opt_datasum, Opt_treelog, Opt_noinode_cache,
+#ifdef CONFIG_BTRFS_DEBUG
+ Opt_fragment_data, Opt_fragment_metadata, Opt_fragment_all,
+#endif
Opt_err,
};
@@ -377,6 +358,11 @@ static match_table_t tokens = {
{Opt_rescan_uuid_tree, "rescan_uuid_tree"},
{Opt_fatal_errors, "fatal_errors=%s"},
{Opt_commit_interval, "commit=%d"},
+#ifdef CONFIG_BTRFS_DEBUG
+ {Opt_fragment_data, "fragment=data"},
+ {Opt_fragment_metadata, "fragment=metadata"},
+ {Opt_fragment_all, "fragment=all"},
+#endif
{Opt_err, NULL},
};
@@ -743,6 +729,22 @@ int btrfs_parse_options(struct btrfs_root *root, char *options)
info->commit_interval = BTRFS_DEFAULT_COMMIT_INTERVAL;
}
break;
+#ifdef CONFIG_BTRFS_DEBUG
+ case Opt_fragment_all:
+ btrfs_info(root->fs_info, "fragmenting all space");
+ btrfs_set_opt(info->mount_opt, FRAGMENT_DATA);
+ btrfs_set_opt(info->mount_opt, FRAGMENT_METADATA);
+ break;
+ case Opt_fragment_metadata:
+ btrfs_info(root->fs_info, "fragmenting metadata");
+ btrfs_set_opt(info->mount_opt,
+ FRAGMENT_METADATA);
+ break;
+ case Opt_fragment_data:
+ btrfs_info(root->fs_info, "fragmenting data");
+ btrfs_set_opt(info->mount_opt, FRAGMENT_DATA);
+ break;
+#endif
case Opt_err:
btrfs_info(root->fs_info, "unrecognized mount option '%s'", p);
ret = -EINVAL;
@@ -841,33 +843,153 @@ out:
return error;
}
-static struct dentry *get_default_root(struct super_block *sb,
- u64 subvol_objectid)
+static char *get_subvol_name_from_objectid(struct btrfs_fs_info *fs_info,
+ u64 subvol_objectid)
{
- struct btrfs_fs_info *fs_info = btrfs_sb(sb);
struct btrfs_root *root = fs_info->tree_root;
- struct btrfs_root *new_root;
- struct btrfs_dir_item *di;
- struct btrfs_path *path;
- struct btrfs_key location;
- struct inode *inode;
- u64 dir_id;
- int new = 0;
+ struct btrfs_root *fs_root;
+ struct btrfs_root_ref *root_ref;
+ struct btrfs_inode_ref *inode_ref;
+ struct btrfs_key key;
+ struct btrfs_path *path = NULL;
+ char *name = NULL, *ptr;
+ u64 dirid;
+ int len;
+ int ret;
+
+ path = btrfs_alloc_path();
+ if (!path) {
+ ret = -ENOMEM;
+ goto err;
+ }
+ path->leave_spinning = 1;
+
+ name = kmalloc(PATH_MAX, GFP_NOFS);
+ if (!name) {
+ ret = -ENOMEM;
+ goto err;
+ }
+ ptr = name + PATH_MAX - 1;
+ ptr[0] = '\0';
/*
- * We have a specific subvol we want to mount, just setup location and
- * go look up the root.
+ * Walk up the subvolume trees in the tree of tree roots by root
+ * backrefs until we hit the top-level subvolume.
*/
- if (subvol_objectid) {
- location.objectid = subvol_objectid;
- location.type = BTRFS_ROOT_ITEM_KEY;
- location.offset = (u64)-1;
- goto find_root;
+ while (subvol_objectid != BTRFS_FS_TREE_OBJECTID) {
+ key.objectid = subvol_objectid;
+ key.type = BTRFS_ROOT_BACKREF_KEY;
+ key.offset = (u64)-1;
+
+ ret = btrfs_search_slot(NULL, root, &key, path, 0, 0);
+ if (ret < 0) {
+ goto err;
+ } else if (ret > 0) {
+ ret = btrfs_previous_item(root, path, subvol_objectid,
+ BTRFS_ROOT_BACKREF_KEY);
+ if (ret < 0) {
+ goto err;
+ } else if (ret > 0) {
+ ret = -ENOENT;
+ goto err;
+ }
+ }
+
+ btrfs_item_key_to_cpu(path->nodes[0], &key, path->slots[0]);
+ subvol_objectid = key.offset;
+
+ root_ref = btrfs_item_ptr(path->nodes[0], path->slots[0],
+ struct btrfs_root_ref);
+ len = btrfs_root_ref_name_len(path->nodes[0], root_ref);
+ ptr -= len + 1;
+ if (ptr < name) {
+ ret = -ENAMETOOLONG;
+ goto err;
+ }
+ read_extent_buffer(path->nodes[0], ptr + 1,
+ (unsigned long)(root_ref + 1), len);
+ ptr[0] = '/';
+ dirid = btrfs_root_ref_dirid(path->nodes[0], root_ref);
+ btrfs_release_path(path);
+
+ key.objectid = subvol_objectid;
+ key.type = BTRFS_ROOT_ITEM_KEY;
+ key.offset = (u64)-1;
+ fs_root = btrfs_read_fs_root_no_name(fs_info, &key);
+ if (IS_ERR(fs_root)) {
+ ret = PTR_ERR(fs_root);
+ goto err;
+ }
+
+ /*
+ * Walk up the filesystem tree by inode refs until we hit the
+ * root directory.
+ */
+ while (dirid != BTRFS_FIRST_FREE_OBJECTID) {
+ key.objectid = dirid;
+ key.type = BTRFS_INODE_REF_KEY;
+ key.offset = (u64)-1;
+
+ ret = btrfs_search_slot(NULL, fs_root, &key, path, 0, 0);
+ if (ret < 0) {
+ goto err;
+ } else if (ret > 0) {
+ ret = btrfs_previous_item(fs_root, path, dirid,
+ BTRFS_INODE_REF_KEY);
+ if (ret < 0) {
+ goto err;
+ } else if (ret > 0) {
+ ret = -ENOENT;
+ goto err;
+ }
+ }
+
+ btrfs_item_key_to_cpu(path->nodes[0], &key, path->slots[0]);
+ dirid = key.offset;
+
+ inode_ref = btrfs_item_ptr(path->nodes[0],
+ path->slots[0],
+ struct btrfs_inode_ref);
+ len = btrfs_inode_ref_name_len(path->nodes[0],
+ inode_ref);
+ ptr -= len + 1;
+ if (ptr < name) {
+ ret = -ENAMETOOLONG;
+ goto err;
+ }
+ read_extent_buffer(path->nodes[0], ptr + 1,
+ (unsigned long)(inode_ref + 1), len);
+ ptr[0] = '/';
+ btrfs_release_path(path);
+ }
}
+ btrfs_free_path(path);
+ if (ptr == name + PATH_MAX - 1) {
+ name[0] = '/';
+ name[1] = '\0';
+ } else {
+ memmove(name, ptr, name + PATH_MAX - ptr);
+ }
+ return name;
+
+err:
+ btrfs_free_path(path);
+ kfree(name);
+ return ERR_PTR(ret);
+}
+
+static int get_default_subvol_objectid(struct btrfs_fs_info *fs_info, u64 *objectid)
+{
+ struct btrfs_root *root = fs_info->tree_root;
+ struct btrfs_dir_item *di;
+ struct btrfs_path *path;
+ struct btrfs_key location;
+ u64 dir_id;
+
path = btrfs_alloc_path();
if (!path)
- return ERR_PTR(-ENOMEM);
+ return -ENOMEM;
path->leave_spinning = 1;
/*
@@ -879,58 +1001,23 @@ static struct dentry *get_default_root(struct super_block *sb,
di = btrfs_lookup_dir_item(NULL, root, path, dir_id, "default", 7, 0);
if (IS_ERR(di)) {
btrfs_free_path(path);
- return ERR_CAST(di);
+ return PTR_ERR(di);
}
if (!di) {
/*
* Ok the default dir item isn't there. This is weird since
* it's always been there, but don't freak out, just try and
- * mount to root most subvolume.
+ * mount the top-level subvolume.
*/
btrfs_free_path(path);
- dir_id = BTRFS_FIRST_FREE_OBJECTID;
- new_root = fs_info->fs_root;
- goto setup_root;
+ *objectid = BTRFS_FS_TREE_OBJECTID;
+ return 0;
}
btrfs_dir_item_key_to_cpu(path->nodes[0], di, &location);
btrfs_free_path(path);
-
-find_root:
- new_root = btrfs_read_fs_root_no_name(fs_info, &location);
- if (IS_ERR(new_root))
- return ERR_CAST(new_root);
-
- if (!(sb->s_flags & MS_RDONLY)) {
- int ret;
- down_read(&fs_info->cleanup_work_sem);
- ret = btrfs_orphan_cleanup(new_root);
- up_read(&fs_info->cleanup_work_sem);
- if (ret)
- return ERR_PTR(ret);
- }
-
- dir_id = btrfs_root_dirid(&new_root->root_item);
-setup_root:
- location.objectid = dir_id;
- location.type = BTRFS_INODE_ITEM_KEY;
- location.offset = 0;
-
- inode = btrfs_iget(sb, &location, new_root, &new);
- if (IS_ERR(inode))
- return ERR_CAST(inode);
-
- /*
- * If we're just mounting the root most subvol put the inode and return
- * a reference to the dentry. We will have already gotten a reference
- * to the inode in btrfs_fill_super so we're good to go.
- */
- if (!new && d_inode(sb->s_root) == inode) {
- iput(inode);
- return dget(sb->s_root);
- }
-
- return d_obtain_root(inode);
+ *objectid = location.objectid;
+ return 0;
}
static int btrfs_fill_super(struct super_block *sb,
@@ -953,6 +1040,7 @@ static int btrfs_fill_super(struct super_block *sb,
sb->s_flags |= MS_POSIXACL;
#endif
sb->s_flags |= MS_I_VERSION;
+ sb->s_iflags |= SB_I_CGROUPWB;
err = open_ctree(sb, fs_devices, (char *)data);
if (err) {
printk(KERN_ERR "BTRFS: open_ctree failed\n");
@@ -1108,6 +1196,16 @@ static int btrfs_show_options(struct seq_file *seq, struct dentry *dentry)
seq_puts(seq, ",fatal_errors=panic");
if (info->commit_interval != BTRFS_DEFAULT_COMMIT_INTERVAL)
seq_printf(seq, ",commit=%d", info->commit_interval);
+#ifdef CONFIG_BTRFS_DEBUG
+ if (btrfs_test_opt(root, FRAGMENT_DATA))
+ seq_puts(seq, ",fragment=data");
+ if (btrfs_test_opt(root, FRAGMENT_METADATA))
+ seq_puts(seq, ",fragment=metadata");
+#endif
+ seq_printf(seq, ",subvolid=%llu",
+ BTRFS_I(d_inode(dentry))->root->root_key.objectid);
+ seq_puts(seq, ",subvol=");
+ seq_dentry(seq, dentry, " \t\n\\");
return 0;
}
@@ -1138,107 +1236,139 @@ static inline int is_subvolume_inode(struct inode *inode)
}
/*
- * This will strip out the subvol=%s argument for an argument string and add
- * subvolid=0 to make sure we get the actual tree root for path walking to the
- * subvol we want.
+ * This will add subvolid=0 to the argument string while removing any subvol=
+ * and subvolid= arguments to make sure we get the top-level root for path
+ * walking to the subvol we want.
*/
static char *setup_root_args(char *args)
{
- unsigned len = strlen(args) + 2 + 1;
- char *src, *dst, *buf;
-
- /*
- * We need the same args as before, but with this substitution:
- * s!subvol=[^,]+!subvolid=0!
- *
- * Since the replacement string is up to 2 bytes longer than the
- * original, allocate strlen(args) + 2 + 1 bytes.
- */
+ char *buf, *dst, *sep;
- src = strstr(args, "subvol=");
- /* This shouldn't happen, but just in case.. */
- if (!src)
- return NULL;
+ if (!args)
+ return kstrdup("subvolid=0", GFP_NOFS);
- buf = dst = kmalloc(len, GFP_NOFS);
+ /* The worst case is that we add ",subvolid=0" to the end. */
+ buf = dst = kmalloc(strlen(args) + strlen(",subvolid=0") + 1, GFP_NOFS);
if (!buf)
return NULL;
- /*
- * If the subvol= arg is not at the start of the string,
- * copy whatever precedes it into buf.
- */
- if (src != args) {
- *src++ = '\0';
- strcpy(buf, args);
- dst += strlen(args);
+ while (1) {
+ sep = strchrnul(args, ',');
+ if (!strstarts(args, "subvol=") &&
+ !strstarts(args, "subvolid=")) {
+ memcpy(dst, args, sep - args);
+ dst += sep - args;
+ *dst++ = ',';
+ }
+ if (*sep)
+ args = sep + 1;
+ else
+ break;
}
-
strcpy(dst, "subvolid=0");
- dst += strlen("subvolid=0");
-
- /*
- * If there is a "," after the original subvol=... string,
- * copy that suffix into our buffer. Otherwise, we're done.
- */
- src = strchr(src, ',');
- if (src)
- strcpy(dst, src);
return buf;
}
-static struct dentry *mount_subvol(const char *subvol_name, int flags,
- const char *device_name, char *data)
+static struct dentry *mount_subvol(const char *subvol_name, u64 subvol_objectid,
+ int flags, const char *device_name,
+ char *data)
{
struct dentry *root;
- struct vfsmount *mnt;
+ struct vfsmount *mnt = NULL;
char *newargs;
+ int ret;
newargs = setup_root_args(data);
- if (!newargs)
- return ERR_PTR(-ENOMEM);
- mnt = vfs_kern_mount(&btrfs_fs_type, flags, device_name,
- newargs);
+ if (!newargs) {
+ root = ERR_PTR(-ENOMEM);
+ goto out;
+ }
- if (PTR_RET(mnt) == -EBUSY) {
+ mnt = vfs_kern_mount(&btrfs_fs_type, flags, device_name, newargs);
+ if (PTR_ERR_OR_ZERO(mnt) == -EBUSY) {
if (flags & MS_RDONLY) {
- mnt = vfs_kern_mount(&btrfs_fs_type, flags & ~MS_RDONLY, device_name,
- newargs);
+ mnt = vfs_kern_mount(&btrfs_fs_type, flags & ~MS_RDONLY,
+ device_name, newargs);
} else {
- int r;
- mnt = vfs_kern_mount(&btrfs_fs_type, flags | MS_RDONLY, device_name,
- newargs);
+ mnt = vfs_kern_mount(&btrfs_fs_type, flags | MS_RDONLY,
+ device_name, newargs);
if (IS_ERR(mnt)) {
- kfree(newargs);
- return ERR_CAST(mnt);
+ root = ERR_CAST(mnt);
+ mnt = NULL;
+ goto out;
}
- r = btrfs_remount(mnt->mnt_sb, &flags, NULL);
- if (r < 0) {
- /* FIXME: release vfsmount mnt ??*/
- kfree(newargs);
- return ERR_PTR(r);
+ down_write(&mnt->mnt_sb->s_umount);
+ ret = btrfs_remount(mnt->mnt_sb, &flags, NULL);
+ up_write(&mnt->mnt_sb->s_umount);
+ if (ret < 0) {
+ root = ERR_PTR(ret);
+ goto out;
}
}
}
+ if (IS_ERR(mnt)) {
+ root = ERR_CAST(mnt);
+ mnt = NULL;
+ goto out;
+ }
- kfree(newargs);
+ if (!subvol_name) {
+ if (!subvol_objectid) {
+ ret = get_default_subvol_objectid(btrfs_sb(mnt->mnt_sb),
+ &subvol_objectid);
+ if (ret) {
+ root = ERR_PTR(ret);
+ goto out;
+ }
+ }
+ subvol_name = get_subvol_name_from_objectid(btrfs_sb(mnt->mnt_sb),
+ subvol_objectid);
+ if (IS_ERR(subvol_name)) {
+ root = ERR_CAST(subvol_name);
+ subvol_name = NULL;
+ goto out;
+ }
- if (IS_ERR(mnt))
- return ERR_CAST(mnt);
+ }
root = mount_subtree(mnt, subvol_name);
+ /* mount_subtree() drops our reference on the vfsmount. */
+ mnt = NULL;
- if (!IS_ERR(root) && !is_subvolume_inode(d_inode(root))) {
+ if (!IS_ERR(root)) {
struct super_block *s = root->d_sb;
- dput(root);
- root = ERR_PTR(-EINVAL);
- deactivate_locked_super(s);
- printk(KERN_ERR "BTRFS: '%s' is not a valid subvolume\n",
- subvol_name);
+ struct inode *root_inode = d_inode(root);
+ u64 root_objectid = BTRFS_I(root_inode)->root->root_key.objectid;
+
+ ret = 0;
+ if (!is_subvolume_inode(root_inode)) {
+ pr_err("BTRFS: '%s' is not a valid subvolume\n",
+ subvol_name);
+ ret = -EINVAL;
+ }
+ if (subvol_objectid && root_objectid != subvol_objectid) {
+ /*
+ * This will also catch a race condition where a
+ * subvolume which was passed by ID is renamed and
+ * another subvolume is renamed over the old location.
+ */
+ pr_err("BTRFS: subvol '%s' does not match subvolid %llu\n",
+ subvol_name, subvol_objectid);
+ ret = -EINVAL;
+ }
+ if (ret) {
+ dput(root);
+ root = ERR_PTR(ret);
+ deactivate_locked_super(s);
+ }
}
+out:
+ mntput(mnt);
+ kfree(newargs);
+ kfree(subvol_name);
return root;
}
@@ -1303,7 +1433,6 @@ static struct dentry *btrfs_mount(struct file_system_type *fs_type, int flags,
{
struct block_device *bdev = NULL;
struct super_block *s;
- struct dentry *root;
struct btrfs_fs_devices *fs_devices = NULL;
struct btrfs_fs_info *fs_info = NULL;
struct security_mnt_opts new_sec_opts;
@@ -1323,10 +1452,10 @@ static struct dentry *btrfs_mount(struct file_system_type *fs_type, int flags,
return ERR_PTR(error);
}
- if (subvol_name) {
- root = mount_subvol(subvol_name, flags, device_name, data);
- kfree(subvol_name);
- return root;
+ if (subvol_name || subvol_objectid != BTRFS_FS_TREE_OBJECTID) {
+ /* mount_subvol() will free subvol_name. */
+ return mount_subvol(subvol_name, subvol_objectid, flags,
+ device_name, data);
}
security_init_mnt_opts(&new_sec_opts);
@@ -1392,23 +1521,19 @@ static struct dentry *btrfs_mount(struct file_system_type *fs_type, int flags,
error = btrfs_fill_super(s, fs_devices, data,
flags & MS_SILENT ? 1 : 0);
}
-
- root = !error ? get_default_root(s, subvol_objectid) : ERR_PTR(error);
- if (IS_ERR(root)) {
+ if (error) {
deactivate_locked_super(s);
- error = PTR_ERR(root);
goto error_sec_opts;
}
fs_info = btrfs_sb(s);
error = setup_security_options(fs_info, s, &new_sec_opts);
if (error) {
- dput(root);
deactivate_locked_super(s);
goto error_sec_opts;
}
- return root;
+ return dget(s->s_root);
error_close_devices:
btrfs_close_devices(fs_devices);
@@ -1539,6 +1664,15 @@ static int btrfs_remount(struct super_block *sb, int *flags, char *data)
sb->s_flags |= MS_RDONLY;
+ /*
+ * Setting MS_RDONLY will put the cleaner thread to
+ * sleep at the next loop if it's already active.
+ * If it's already asleep, we'll leave unused block
+ * groups on disk until we're mounted read-write again
+ * unless we clean them up here.
+ */
+ btrfs_delete_unused_bgs(fs_info);
+
btrfs_dev_replace_suspend_for_unmount(fs_info);
btrfs_scrub_cancel(fs_info);
btrfs_pause_balance(fs_info);
@@ -1822,6 +1956,8 @@ static int btrfs_calc_avail_data_space(struct btrfs_root *root, u64 *free_bytes)
* there are other factors that may change the result (like a new metadata
* chunk).
*
+ * If metadata is exhausted, f_bavail will be 0.
+ *
* FIXME: not accurate for mixed block groups, total and free/used are ok,
* available appears slightly larger.
*/
@@ -1833,11 +1969,13 @@ static int btrfs_statfs(struct dentry *dentry, struct kstatfs *buf)
struct btrfs_space_info *found;
u64 total_used = 0;
u64 total_free_data = 0;
+ u64 total_free_meta = 0;
int bits = dentry->d_sb->s_blocksize_bits;
__be32 *fsid = (__be32 *)fs_info->fsid;
unsigned factor = 1;
struct btrfs_block_rsv *block_rsv = &fs_info->global_block_rsv;
int ret;
+ u64 thresh = 0;
/*
* holding chunk_muext to avoid allocating new chunks, holding
@@ -1863,6 +2001,8 @@ static int btrfs_statfs(struct dentry *dentry, struct kstatfs *buf)
}
}
}
+ if (found->flags & BTRFS_BLOCK_GROUP_METADATA)
+ total_free_meta += found->disk_total - found->disk_used;
total_used += found->disk_used;
}
@@ -1885,6 +2025,24 @@ static int btrfs_statfs(struct dentry *dentry, struct kstatfs *buf)
buf->f_bavail += div_u64(total_free_data, factor);
buf->f_bavail = buf->f_bavail >> bits;
+ /*
+ * We calculate the remaining metadata space minus global reserve. If
+ * this is (supposedly) smaller than zero, there's no space. But this
+ * does not hold in practice, the exhausted state happens where's still
+ * some positive delta. So we apply some guesswork and compare the
+ * delta to a 4M threshold. (Practically observed delta was ~2M.)
+ *
+ * We probably cannot calculate the exact threshold value because this
+ * depends on the internal reservations requested by various
+ * operations, so some operations that consume a few metadata will
+ * succeed even if the Avail is zero. But this is better than the other
+ * way around.
+ */
+ thresh = 4 * 1024 * 1024;
+
+ if (total_free_meta - thresh < block_rsv->size)
+ buf->f_bavail = 0;
+
buf->f_type = BTRFS_SUPER_MAGIC;
buf->f_bsize = dentry->d_sb->s_blocksize;
buf->f_namelen = BTRFS_NAME_LEN;
@@ -2052,8 +2210,7 @@ static int btrfs_interface_init(void)
static void btrfs_interface_exit(void)
{
- if (misc_deregister(&btrfs_misc) < 0)
- printk(KERN_INFO "BTRFS: misc_deregister failed for control device\n");
+ misc_deregister(&btrfs_misc);
}
static void btrfs_print_info(void)
diff --git a/kernel/fs/btrfs/sysfs.c b/kernel/fs/btrfs/sysfs.c
index e8a4c86d2..e0ac85949 100644
--- a/kernel/fs/btrfs/sysfs.c
+++ b/kernel/fs/btrfs/sysfs.c
@@ -33,6 +33,7 @@
#include "volumes.h"
static inline struct btrfs_fs_info *to_fs_info(struct kobject *kobj);
+static inline struct btrfs_fs_devices *to_fs_devs(struct kobject *kobj);
static u64 get_features(struct btrfs_fs_info *fs_info,
enum btrfs_feature_set set)
@@ -428,7 +429,7 @@ static ssize_t btrfs_clone_alignment_show(struct kobject *kobj,
BTRFS_ATTR(clone_alignment, btrfs_clone_alignment_show);
-static struct attribute *btrfs_attrs[] = {
+static const struct attribute *btrfs_attrs[] = {
BTRFS_ATTR_PTR(label),
BTRFS_ATTR_PTR(nodesize),
BTRFS_ATTR_PTR(sectorsize),
@@ -436,23 +437,31 @@ static struct attribute *btrfs_attrs[] = {
NULL,
};
-static void btrfs_release_super_kobj(struct kobject *kobj)
+static void btrfs_release_fsid_kobj(struct kobject *kobj)
{
- struct btrfs_fs_info *fs_info = to_fs_info(kobj);
- complete(&fs_info->kobj_unregister);
+ struct btrfs_fs_devices *fs_devs = to_fs_devs(kobj);
+
+ memset(&fs_devs->fsid_kobj, 0, sizeof(struct kobject));
+ complete(&fs_devs->kobj_unregister);
}
static struct kobj_type btrfs_ktype = {
.sysfs_ops = &kobj_sysfs_ops,
- .release = btrfs_release_super_kobj,
- .default_attrs = btrfs_attrs,
+ .release = btrfs_release_fsid_kobj,
};
+static inline struct btrfs_fs_devices *to_fs_devs(struct kobject *kobj)
+{
+ if (kobj->ktype != &btrfs_ktype)
+ return NULL;
+ return container_of(kobj, struct btrfs_fs_devices, fsid_kobj);
+}
+
static inline struct btrfs_fs_info *to_fs_info(struct kobject *kobj)
{
if (kobj->ktype != &btrfs_ktype)
return NULL;
- return container_of(kobj, struct btrfs_fs_info, super_kobj);
+ return to_fs_devs(kobj)->fs_info;
}
#define NUM_FEATURE_BITS 64
@@ -493,12 +502,12 @@ static int addrm_unknown_feature_attrs(struct btrfs_fs_info *fs_info, bool add)
attrs[0] = &fa->kobj_attr.attr;
if (add) {
int ret;
- ret = sysfs_merge_group(&fs_info->super_kobj,
+ ret = sysfs_merge_group(&fs_info->fs_devices->fsid_kobj,
&agroup);
if (ret)
return ret;
} else
- sysfs_unmerge_group(&fs_info->super_kobj,
+ sysfs_unmerge_group(&fs_info->fs_devices->fsid_kobj,
&agroup);
}
@@ -506,25 +515,49 @@ static int addrm_unknown_feature_attrs(struct btrfs_fs_info *fs_info, bool add)
return 0;
}
-static void __btrfs_sysfs_remove_one(struct btrfs_fs_info *fs_info)
+static void __btrfs_sysfs_remove_fsid(struct btrfs_fs_devices *fs_devs)
+{
+ if (fs_devs->device_dir_kobj) {
+ kobject_del(fs_devs->device_dir_kobj);
+ kobject_put(fs_devs->device_dir_kobj);
+ fs_devs->device_dir_kobj = NULL;
+ }
+
+ if (fs_devs->fsid_kobj.state_initialized) {
+ kobject_del(&fs_devs->fsid_kobj);
+ kobject_put(&fs_devs->fsid_kobj);
+ wait_for_completion(&fs_devs->kobj_unregister);
+ }
+}
+
+/* when fs_devs is NULL it will remove all fsid kobject */
+void btrfs_sysfs_remove_fsid(struct btrfs_fs_devices *fs_devs)
{
- kobject_del(&fs_info->super_kobj);
- kobject_put(&fs_info->super_kobj);
- wait_for_completion(&fs_info->kobj_unregister);
+ struct list_head *fs_uuids = btrfs_get_fs_uuids();
+
+ if (fs_devs) {
+ __btrfs_sysfs_remove_fsid(fs_devs);
+ return;
+ }
+
+ list_for_each_entry(fs_devs, fs_uuids, list) {
+ __btrfs_sysfs_remove_fsid(fs_devs);
+ }
}
-void btrfs_sysfs_remove_one(struct btrfs_fs_info *fs_info)
+void btrfs_sysfs_remove_mounted(struct btrfs_fs_info *fs_info)
{
+ btrfs_reset_fs_info_ptr(fs_info);
+
if (fs_info->space_info_kobj) {
sysfs_remove_files(fs_info->space_info_kobj, allocation_attrs);
kobject_del(fs_info->space_info_kobj);
kobject_put(fs_info->space_info_kobj);
}
- kobject_del(fs_info->device_dir_kobj);
- kobject_put(fs_info->device_dir_kobj);
addrm_unknown_feature_attrs(fs_info, false);
- sysfs_remove_group(&fs_info->super_kobj, &btrfs_feature_attr_group);
- __btrfs_sysfs_remove_one(fs_info);
+ sysfs_remove_group(&fs_info->fs_devices->fsid_kobj, &btrfs_feature_attr_group);
+ sysfs_remove_files(&fs_info->fs_devices->fsid_kobj, btrfs_attrs);
+ btrfs_sysfs_rm_device_link(fs_info->fs_devices, NULL);
}
const char * const btrfs_feature_set_names[3] = {
@@ -602,40 +635,60 @@ static void init_feature_attrs(void)
}
}
-int btrfs_kobj_rm_device(struct btrfs_fs_info *fs_info,
+/* when one_device is NULL, it removes all device links */
+
+int btrfs_sysfs_rm_device_link(struct btrfs_fs_devices *fs_devices,
struct btrfs_device *one_device)
{
struct hd_struct *disk;
struct kobject *disk_kobj;
- if (!fs_info->device_dir_kobj)
+ if (!fs_devices->device_dir_kobj)
return -EINVAL;
if (one_device && one_device->bdev) {
disk = one_device->bdev->bd_part;
disk_kobj = &part_to_dev(disk)->kobj;
- sysfs_remove_link(fs_info->device_dir_kobj,
+ sysfs_remove_link(fs_devices->device_dir_kobj,
+ disk_kobj->name);
+ }
+
+ if (one_device)
+ return 0;
+
+ list_for_each_entry(one_device,
+ &fs_devices->devices, dev_list) {
+ if (!one_device->bdev)
+ continue;
+ disk = one_device->bdev->bd_part;
+ disk_kobj = &part_to_dev(disk)->kobj;
+
+ sysfs_remove_link(fs_devices->device_dir_kobj,
disk_kobj->name);
}
return 0;
}
-int btrfs_kobj_add_device(struct btrfs_fs_info *fs_info,
- struct btrfs_device *one_device)
+int btrfs_sysfs_add_device(struct btrfs_fs_devices *fs_devs)
{
- int error = 0;
- struct btrfs_fs_devices *fs_devices = fs_info->fs_devices;
- struct btrfs_device *dev;
-
- if (!fs_info->device_dir_kobj)
- fs_info->device_dir_kobj = kobject_create_and_add("devices",
- &fs_info->super_kobj);
+ if (!fs_devs->device_dir_kobj)
+ fs_devs->device_dir_kobj = kobject_create_and_add("devices",
+ &fs_devs->fsid_kobj);
- if (!fs_info->device_dir_kobj)
+ if (!fs_devs->device_dir_kobj)
return -ENOMEM;
+ return 0;
+}
+
+int btrfs_sysfs_add_device_link(struct btrfs_fs_devices *fs_devices,
+ struct btrfs_device *one_device)
+{
+ int error = 0;
+ struct btrfs_device *dev;
+
list_for_each_entry(dev, &fs_devices->devices, dev_list) {
struct hd_struct *disk;
struct kobject *disk_kobj;
@@ -649,7 +702,7 @@ int btrfs_kobj_add_device(struct btrfs_fs_info *fs_info,
disk = dev->bdev->bd_part;
disk_kobj = &part_to_dev(disk)->kobj;
- error = sysfs_create_link(fs_info->device_dir_kobj,
+ error = sysfs_create_link(fs_devices->device_dir_kobj,
disk_kobj, disk_kobj->name);
if (error)
break;
@@ -667,34 +720,51 @@ static struct dentry *btrfs_debugfs_root_dentry;
/* Debugging tunables and exported data */
u64 btrfs_debugfs_test;
-int btrfs_sysfs_add_one(struct btrfs_fs_info *fs_info)
+/*
+ * Can be called by the device discovery thread.
+ * And parent can be specified for seed device
+ */
+int btrfs_sysfs_add_fsid(struct btrfs_fs_devices *fs_devs,
+ struct kobject *parent)
{
int error;
- init_completion(&fs_info->kobj_unregister);
- fs_info->super_kobj.kset = btrfs_kset;
- error = kobject_init_and_add(&fs_info->super_kobj, &btrfs_ktype, NULL,
- "%pU", fs_info->fsid);
+ init_completion(&fs_devs->kobj_unregister);
+ fs_devs->fsid_kobj.kset = btrfs_kset;
+ error = kobject_init_and_add(&fs_devs->fsid_kobj,
+ &btrfs_ktype, parent, "%pU", fs_devs->fsid);
+ return error;
+}
+
+int btrfs_sysfs_add_mounted(struct btrfs_fs_info *fs_info)
+{
+ int error;
+ struct btrfs_fs_devices *fs_devs = fs_info->fs_devices;
+ struct kobject *fsid_kobj = &fs_devs->fsid_kobj;
+
+ btrfs_set_fs_info_ptr(fs_info);
+
+ error = btrfs_sysfs_add_device_link(fs_devs, NULL);
if (error)
return error;
- error = sysfs_create_group(&fs_info->super_kobj,
- &btrfs_feature_attr_group);
+ error = sysfs_create_files(fsid_kobj, btrfs_attrs);
if (error) {
- __btrfs_sysfs_remove_one(fs_info);
+ btrfs_sysfs_rm_device_link(fs_devs, NULL);
return error;
}
- error = addrm_unknown_feature_attrs(fs_info, true);
+ error = sysfs_create_group(fsid_kobj,
+ &btrfs_feature_attr_group);
if (error)
goto failure;
- error = btrfs_kobj_add_device(fs_info, NULL);
+ error = addrm_unknown_feature_attrs(fs_info, true);
if (error)
goto failure;
fs_info->space_info_kobj = kobject_create_and_add("allocation",
- &fs_info->super_kobj);
+ fsid_kobj);
if (!fs_info->space_info_kobj) {
error = -ENOMEM;
goto failure;
@@ -706,7 +776,7 @@ int btrfs_sysfs_add_one(struct btrfs_fs_info *fs_info)
return 0;
failure:
- btrfs_sysfs_remove_one(fs_info);
+ btrfs_sysfs_remove_mounted(fs_info);
return error;
}
diff --git a/kernel/fs/btrfs/sysfs.h b/kernel/fs/btrfs/sysfs.h
index 3a4bbed72..9c0952212 100644
--- a/kernel/fs/btrfs/sysfs.h
+++ b/kernel/fs/btrfs/sysfs.h
@@ -82,8 +82,12 @@ char *btrfs_printable_features(enum btrfs_feature_set set, u64 flags);
extern const char * const btrfs_feature_set_names[3];
extern struct kobj_type space_info_ktype;
extern struct kobj_type btrfs_raid_ktype;
-int btrfs_kobj_add_device(struct btrfs_fs_info *fs_info,
+int btrfs_sysfs_add_device_link(struct btrfs_fs_devices *fs_devices,
struct btrfs_device *one_device);
-int btrfs_kobj_rm_device(struct btrfs_fs_info *fs_info,
+int btrfs_sysfs_rm_device_link(struct btrfs_fs_devices *fs_devices,
struct btrfs_device *one_device);
+int btrfs_sysfs_add_fsid(struct btrfs_fs_devices *fs_devs,
+ struct kobject *parent);
+int btrfs_sysfs_add_device(struct btrfs_fs_devices *fs_devs);
+void btrfs_sysfs_remove_fsid(struct btrfs_fs_devices *fs_devs);
#endif /* _BTRFS_SYSFS_H_ */
diff --git a/kernel/fs/btrfs/tests/free-space-tests.c b/kernel/fs/btrfs/tests/free-space-tests.c
index 2299bfde3..8b72b005b 100644
--- a/kernel/fs/btrfs/tests/free-space-tests.c
+++ b/kernel/fs/btrfs/tests/free-space-tests.c
@@ -19,6 +19,7 @@
#include <linux/slab.h>
#include "btrfs-tests.h"
#include "../ctree.h"
+#include "../disk-io.h"
#include "../free-space-cache.h"
#define BITS_PER_BITMAP (PAGE_CACHE_SIZE * 8)
@@ -35,6 +36,12 @@ static struct btrfs_block_group_cache *init_test_block_group(void)
kfree(cache);
return NULL;
}
+ cache->fs_info = btrfs_alloc_dummy_fs_info();
+ if (!cache->fs_info) {
+ kfree(cache->free_space_ctl);
+ kfree(cache);
+ return NULL;
+ }
cache->key.objectid = 0;
cache->key.offset = 1024 * 1024 * 1024;
@@ -879,7 +886,8 @@ test_steal_space_from_bitmap_to_extent(struct btrfs_block_group_cache *cache)
int btrfs_test_free_space_cache(void)
{
struct btrfs_block_group_cache *cache;
- int ret;
+ struct btrfs_root *root = NULL;
+ int ret = -ENOMEM;
test_msg("Running btrfs free space cache tests\n");
@@ -889,6 +897,19 @@ int btrfs_test_free_space_cache(void)
return 0;
}
+ root = btrfs_alloc_dummy_root();
+ if (IS_ERR(root)) {
+ ret = PTR_ERR(root);
+ goto out;
+ }
+
+ root->fs_info = btrfs_alloc_dummy_fs_info();
+ if (!root->fs_info)
+ goto out;
+
+ root->fs_info->extent_root = root;
+ cache->fs_info = root->fs_info;
+
ret = test_extents(cache);
if (ret)
goto out;
@@ -904,6 +925,7 @@ out:
__btrfs_remove_free_space_cache(cache->free_space_ctl);
kfree(cache->free_space_ctl);
kfree(cache);
+ btrfs_free_dummy_root(root);
test_msg("Free space cache tests finished\n");
return ret;
}
diff --git a/kernel/fs/btrfs/tests/qgroup-tests.c b/kernel/fs/btrfs/tests/qgroup-tests.c
index c32a7ba76..846d277b1 100644
--- a/kernel/fs/btrfs/tests/qgroup-tests.c
+++ b/kernel/fs/btrfs/tests/qgroup-tests.c
@@ -21,6 +21,7 @@
#include "../transaction.h"
#include "../disk-io.h"
#include "../qgroup.h"
+#include "../backref.h"
static void init_dummy_trans(struct btrfs_trans_handle *trans)
{
@@ -227,6 +228,8 @@ static int test_no_shared_qgroup(struct btrfs_root *root)
{
struct btrfs_trans_handle trans;
struct btrfs_fs_info *fs_info = root->fs_info;
+ struct ulist *old_roots = NULL;
+ struct ulist *new_roots = NULL;
int ret;
init_dummy_trans(&trans);
@@ -238,10 +241,15 @@ static int test_no_shared_qgroup(struct btrfs_root *root)
return ret;
}
- ret = btrfs_qgroup_record_ref(&trans, fs_info, 5, 4096, 4096,
- BTRFS_QGROUP_OPER_ADD_EXCL, 0);
+ /*
+ * Since the test trans doesn't havee the complicated delayed refs,
+ * we can only call btrfs_qgroup_account_extent() directly to test
+ * quota.
+ */
+ ret = btrfs_find_all_roots(&trans, fs_info, 4096, 0, &old_roots);
if (ret) {
- test_msg("Couldn't add space to a qgroup %d\n", ret);
+ ulist_free(old_roots);
+ test_msg("Couldn't find old roots: %d\n", ret);
return ret;
}
@@ -249,9 +257,18 @@ static int test_no_shared_qgroup(struct btrfs_root *root)
if (ret)
return ret;
- ret = btrfs_delayed_qgroup_accounting(&trans, fs_info);
+ ret = btrfs_find_all_roots(&trans, fs_info, 4096, 0, &new_roots);
+ if (ret) {
+ ulist_free(old_roots);
+ ulist_free(new_roots);
+ test_msg("Couldn't find old roots: %d\n", ret);
+ return ret;
+ }
+
+ ret = btrfs_qgroup_account_extent(&trans, fs_info, 4096, 4096,
+ old_roots, new_roots);
if (ret) {
- test_msg("Delayed qgroup accounting failed %d\n", ret);
+ test_msg("Couldn't account space for a qgroup %d\n", ret);
return ret;
}
@@ -259,21 +276,32 @@ static int test_no_shared_qgroup(struct btrfs_root *root)
test_msg("Qgroup counts didn't match expected values\n");
return -EINVAL;
}
+ old_roots = NULL;
+ new_roots = NULL;
+
+ ret = btrfs_find_all_roots(&trans, fs_info, 4096, 0, &old_roots);
+ if (ret) {
+ ulist_free(old_roots);
+ test_msg("Couldn't find old roots: %d\n", ret);
+ return ret;
+ }
ret = remove_extent_item(root, 4096, 4096);
if (ret)
return -EINVAL;
- ret = btrfs_qgroup_record_ref(&trans, fs_info, 5, 4096, 4096,
- BTRFS_QGROUP_OPER_SUB_EXCL, 0);
+ ret = btrfs_find_all_roots(&trans, fs_info, 4096, 0, &new_roots);
if (ret) {
- test_msg("Couldn't remove space from the qgroup %d\n", ret);
- return -EINVAL;
+ ulist_free(old_roots);
+ ulist_free(new_roots);
+ test_msg("Couldn't find old roots: %d\n", ret);
+ return ret;
}
- ret = btrfs_delayed_qgroup_accounting(&trans, fs_info);
+ ret = btrfs_qgroup_account_extent(&trans, fs_info, 4096, 4096,
+ old_roots, new_roots);
if (ret) {
- test_msg("Qgroup accounting failed %d\n", ret);
+ test_msg("Couldn't account space for a qgroup %d\n", ret);
return -EINVAL;
}
@@ -294,6 +322,8 @@ static int test_multiple_refs(struct btrfs_root *root)
{
struct btrfs_trans_handle trans;
struct btrfs_fs_info *fs_info = root->fs_info;
+ struct ulist *old_roots = NULL;
+ struct ulist *new_roots = NULL;
int ret;
init_dummy_trans(&trans);
@@ -307,20 +337,29 @@ static int test_multiple_refs(struct btrfs_root *root)
return ret;
}
+ ret = btrfs_find_all_roots(&trans, fs_info, 4096, 0, &old_roots);
+ if (ret) {
+ ulist_free(old_roots);
+ test_msg("Couldn't find old roots: %d\n", ret);
+ return ret;
+ }
+
ret = insert_normal_tree_ref(root, 4096, 4096, 0, 5);
if (ret)
return ret;
- ret = btrfs_qgroup_record_ref(&trans, fs_info, 5, 4096, 4096,
- BTRFS_QGROUP_OPER_ADD_EXCL, 0);
+ ret = btrfs_find_all_roots(&trans, fs_info, 4096, 0, &new_roots);
if (ret) {
- test_msg("Couldn't add space to a qgroup %d\n", ret);
+ ulist_free(old_roots);
+ ulist_free(new_roots);
+ test_msg("Couldn't find old roots: %d\n", ret);
return ret;
}
- ret = btrfs_delayed_qgroup_accounting(&trans, fs_info);
+ ret = btrfs_qgroup_account_extent(&trans, fs_info, 4096, 4096,
+ old_roots, new_roots);
if (ret) {
- test_msg("Delayed qgroup accounting failed %d\n", ret);
+ test_msg("Couldn't account space for a qgroup %d\n", ret);
return ret;
}
@@ -329,20 +368,29 @@ static int test_multiple_refs(struct btrfs_root *root)
return -EINVAL;
}
+ ret = btrfs_find_all_roots(&trans, fs_info, 4096, 0, &old_roots);
+ if (ret) {
+ ulist_free(old_roots);
+ test_msg("Couldn't find old roots: %d\n", ret);
+ return ret;
+ }
+
ret = add_tree_ref(root, 4096, 4096, 0, 256);
if (ret)
return ret;
- ret = btrfs_qgroup_record_ref(&trans, fs_info, 256, 4096, 4096,
- BTRFS_QGROUP_OPER_ADD_SHARED, 0);
+ ret = btrfs_find_all_roots(&trans, fs_info, 4096, 0, &new_roots);
if (ret) {
- test_msg("Qgroup record ref failed %d\n", ret);
+ ulist_free(old_roots);
+ ulist_free(new_roots);
+ test_msg("Couldn't find old roots: %d\n", ret);
return ret;
}
- ret = btrfs_delayed_qgroup_accounting(&trans, fs_info);
+ ret = btrfs_qgroup_account_extent(&trans, fs_info, 4096, 4096,
+ old_roots, new_roots);
if (ret) {
- test_msg("Qgroup accounting failed %d\n", ret);
+ test_msg("Couldn't account space for a qgroup %d\n", ret);
return ret;
}
@@ -356,20 +404,29 @@ static int test_multiple_refs(struct btrfs_root *root)
return -EINVAL;
}
+ ret = btrfs_find_all_roots(&trans, fs_info, 4096, 0, &old_roots);
+ if (ret) {
+ ulist_free(old_roots);
+ test_msg("Couldn't find old roots: %d\n", ret);
+ return ret;
+ }
+
ret = remove_extent_ref(root, 4096, 4096, 0, 256);
if (ret)
return ret;
- ret = btrfs_qgroup_record_ref(&trans, fs_info, 256, 4096, 4096,
- BTRFS_QGROUP_OPER_SUB_SHARED, 0);
+ ret = btrfs_find_all_roots(&trans, fs_info, 4096, 0, &new_roots);
if (ret) {
- test_msg("Qgroup record ref failed %d\n", ret);
+ ulist_free(old_roots);
+ ulist_free(new_roots);
+ test_msg("Couldn't find old roots: %d\n", ret);
return ret;
}
- ret = btrfs_delayed_qgroup_accounting(&trans, fs_info);
+ ret = btrfs_qgroup_account_extent(&trans, fs_info, 4096, 4096,
+ old_roots, new_roots);
if (ret) {
- test_msg("Qgroup accounting failed %d\n", ret);
+ test_msg("Couldn't account space for a qgroup %d\n", ret);
return ret;
}
diff --git a/kernel/fs/btrfs/transaction.c b/kernel/fs/btrfs/transaction.c
index 00d18c2bd..be8eae80f 100644
--- a/kernel/fs/btrfs/transaction.c
+++ b/kernel/fs/btrfs/transaction.c
@@ -82,6 +82,12 @@ void btrfs_put_transaction(struct btrfs_transaction *transaction)
static void clear_btree_io_tree(struct extent_io_tree *tree)
{
spin_lock(&tree->lock);
+ /*
+ * Do a single barrier for the waitqueue_active check here, the state
+ * of the waitqueue should not change once clear_btree_io_tree is
+ * called.
+ */
+ smp_mb();
while (!RB_EMPTY_ROOT(&tree->state)) {
struct rb_node *node;
struct extent_state *state;
@@ -117,6 +123,18 @@ static noinline void switch_commit_roots(struct btrfs_transaction *trans,
btrfs_unpin_free_ino(root);
clear_btree_io_tree(&root->dirty_log_pages);
}
+
+ /* We can free old roots now. */
+ spin_lock(&trans->dropped_roots_lock);
+ while (!list_empty(&trans->dropped_roots)) {
+ root = list_first_entry(&trans->dropped_roots,
+ struct btrfs_root, root_list);
+ list_del_init(&root->root_list);
+ spin_unlock(&trans->dropped_roots_lock);
+ btrfs_drop_and_free_fs_root(fs_info, root);
+ spin_lock(&trans->dropped_roots_lock);
+ }
+ spin_unlock(&trans->dropped_roots_lock);
up_write(&fs_info->commit_root_sem);
}
@@ -214,23 +232,22 @@ loop:
extwriter_counter_init(cur_trans, type);
init_waitqueue_head(&cur_trans->writer_wait);
init_waitqueue_head(&cur_trans->commit_wait);
+ init_waitqueue_head(&cur_trans->pending_wait);
cur_trans->state = TRANS_STATE_RUNNING;
/*
* One for this trans handle, one so it will live on until we
* commit the transaction.
*/
atomic_set(&cur_trans->use_count, 2);
- cur_trans->have_free_bgs = 0;
+ atomic_set(&cur_trans->pending_ordered, 0);
+ cur_trans->flags = 0;
cur_trans->start_time = get_seconds();
- cur_trans->dirty_bg_run = 0;
+
+ memset(&cur_trans->delayed_refs, 0, sizeof(cur_trans->delayed_refs));
cur_trans->delayed_refs.href_root = RB_ROOT;
+ cur_trans->delayed_refs.dirty_extent_root = RB_ROOT;
atomic_set(&cur_trans->delayed_refs.num_entries, 0);
- cur_trans->delayed_refs.num_heads_ready = 0;
- cur_trans->delayed_refs.pending_csums = 0;
- cur_trans->delayed_refs.num_heads = 0;
- cur_trans->delayed_refs.flushing = 0;
- cur_trans->delayed_refs.run_delayed_start = 0;
/*
* although the tree mod log is per file system and not per transaction,
@@ -250,12 +267,14 @@ loop:
INIT_LIST_HEAD(&cur_trans->pending_snapshots);
INIT_LIST_HEAD(&cur_trans->pending_chunks);
INIT_LIST_HEAD(&cur_trans->switch_commits);
- INIT_LIST_HEAD(&cur_trans->pending_ordered);
INIT_LIST_HEAD(&cur_trans->dirty_bgs);
INIT_LIST_HEAD(&cur_trans->io_bgs);
+ INIT_LIST_HEAD(&cur_trans->dropped_roots);
mutex_init(&cur_trans->cache_write_mutex);
cur_trans->num_dirty_bgs = 0;
spin_lock_init(&cur_trans->dirty_bgs_lock);
+ INIT_LIST_HEAD(&cur_trans->deleted_bgs);
+ spin_lock_init(&cur_trans->dropped_roots_lock);
list_add_tail(&cur_trans->list, &fs_info->trans_list);
extent_io_tree_init(&cur_trans->dirty_pages,
fs_info->btree_inode->i_mapping);
@@ -332,6 +351,24 @@ static int record_root_in_trans(struct btrfs_trans_handle *trans,
}
+void btrfs_add_dropped_root(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root)
+{
+ struct btrfs_transaction *cur_trans = trans->transaction;
+
+ /* Add ourselves to the transaction dropped list */
+ spin_lock(&cur_trans->dropped_roots_lock);
+ list_add_tail(&root->root_list, &cur_trans->dropped_roots);
+ spin_unlock(&cur_trans->dropped_roots_lock);
+
+ /* Make sure we don't try to update the root at commit time */
+ spin_lock(&root->fs_info->fs_roots_radix_lock);
+ radix_tree_tag_clear(&root->fs_info->fs_roots_radix,
+ (unsigned long)root->root_key.objectid,
+ BTRFS_ROOT_TRANS_TAG);
+ spin_unlock(&root->fs_info->fs_roots_radix_lock);
+}
+
int btrfs_record_root_in_trans(struct btrfs_trans_handle *trans,
struct btrfs_root *root)
{
@@ -411,8 +448,8 @@ static inline bool need_reserve_reloc_root(struct btrfs_root *root)
}
static struct btrfs_trans_handle *
-start_transaction(struct btrfs_root *root, u64 num_items, unsigned int type,
- enum btrfs_reserve_flush_enum flush)
+start_transaction(struct btrfs_root *root, unsigned int num_items,
+ unsigned int type, enum btrfs_reserve_flush_enum flush)
{
struct btrfs_trans_handle *h;
struct btrfs_transaction *cur_trans;
@@ -442,13 +479,10 @@ start_transaction(struct btrfs_root *root, u64 num_items, unsigned int type,
* the appropriate flushing if need be.
*/
if (num_items > 0 && root != root->fs_info->chunk_root) {
- if (root->fs_info->quota_enabled &&
- is_fstree(root->root_key.objectid)) {
- qgroup_reserved = num_items * root->nodesize;
- ret = btrfs_qgroup_reserve(root, qgroup_reserved);
- if (ret)
- return ERR_PTR(ret);
- }
+ qgroup_reserved = num_items * root->nodesize;
+ ret = btrfs_qgroup_reserve_meta(root, qgroup_reserved);
+ if (ret)
+ return ERR_PTR(ret);
num_bytes = btrfs_calc_trans_metadata_size(root, num_items);
/*
@@ -466,7 +500,7 @@ start_transaction(struct btrfs_root *root, u64 num_items, unsigned int type,
goto reserve_fail;
}
again:
- h = kmem_cache_alloc(btrfs_trans_handle_cachep, GFP_NOFS);
+ h = kmem_cache_zalloc(btrfs_trans_handle_cachep, GFP_NOFS);
if (!h) {
ret = -ENOMEM;
goto alloc_fail;
@@ -507,24 +541,13 @@ again:
h->transid = cur_trans->transid;
h->transaction = cur_trans;
- h->blocks_used = 0;
- h->bytes_reserved = 0;
h->root = root;
- h->delayed_ref_updates = 0;
h->use_count = 1;
- h->adding_csums = 0;
- h->block_rsv = NULL;
- h->orig_rsv = NULL;
- h->aborted = 0;
- h->qgroup_reserved = 0;
- h->delayed_ref_elem.seq = 0;
+
h->type = type;
- h->allocating_chunk = false;
- h->reloc_reserved = false;
- h->sync = false;
+ h->can_flush_pending_bgs = true;
INIT_LIST_HEAD(&h->qgroup_ref_list);
INIT_LIST_HEAD(&h->new_bgs);
- INIT_LIST_HEAD(&h->ordered);
smp_mb();
if (cur_trans->state >= TRANS_STATE_BLOCKED &&
@@ -541,7 +564,6 @@ again:
h->bytes_reserved = num_bytes;
h->reloc_reserved = reloc_reserved;
}
- h->qgroup_reserved = qgroup_reserved;
got_it:
btrfs_record_root_in_trans(h, root);
@@ -559,20 +581,52 @@ alloc_fail:
btrfs_block_rsv_release(root, &root->fs_info->trans_block_rsv,
num_bytes);
reserve_fail:
- if (qgroup_reserved)
- btrfs_qgroup_free(root, qgroup_reserved);
+ btrfs_qgroup_free_meta(root, qgroup_reserved);
return ERR_PTR(ret);
}
struct btrfs_trans_handle *btrfs_start_transaction(struct btrfs_root *root,
- int num_items)
+ unsigned int num_items)
{
return start_transaction(root, num_items, TRANS_START,
BTRFS_RESERVE_FLUSH_ALL);
}
+struct btrfs_trans_handle *btrfs_start_transaction_fallback_global_rsv(
+ struct btrfs_root *root,
+ unsigned int num_items,
+ int min_factor)
+{
+ struct btrfs_trans_handle *trans;
+ u64 num_bytes;
+ int ret;
+
+ trans = btrfs_start_transaction(root, num_items);
+ if (!IS_ERR(trans) || PTR_ERR(trans) != -ENOSPC)
+ return trans;
+
+ trans = btrfs_start_transaction(root, 0);
+ if (IS_ERR(trans))
+ return trans;
+
+ num_bytes = btrfs_calc_trans_metadata_size(root, num_items);
+ ret = btrfs_cond_migrate_bytes(root->fs_info,
+ &root->fs_info->trans_block_rsv,
+ num_bytes,
+ min_factor);
+ if (ret) {
+ btrfs_end_transaction(trans, root);
+ return ERR_PTR(ret);
+ }
+
+ trans->block_rsv = &root->fs_info->trans_block_rsv;
+ trans->bytes_reserved = num_bytes;
+
+ return trans;
+}
struct btrfs_trans_handle *btrfs_start_transaction_lflush(
- struct btrfs_root *root, int num_items)
+ struct btrfs_root *root,
+ unsigned int num_items)
{
return start_transaction(root, num_items, TRANS_START,
BTRFS_RESERVE_FLUSH_LIMIT);
@@ -756,12 +810,6 @@ static int __btrfs_end_transaction(struct btrfs_trans_handle *trans,
if (!list_empty(&trans->new_bgs))
btrfs_create_pending_block_groups(trans, root);
- if (!list_empty(&trans->ordered)) {
- spin_lock(&info->trans_lock);
- list_splice_init(&trans->ordered, &cur_trans->pending_ordered);
- spin_unlock(&info->trans_lock);
- }
-
trans->delayed_ref_updates = 0;
if (!trans->sync) {
must_run_delayed_refs =
@@ -777,21 +825,14 @@ static int __btrfs_end_transaction(struct btrfs_trans_handle *trans,
must_run_delayed_refs = 2;
}
- if (trans->qgroup_reserved) {
- /*
- * the same root has to be passed here between start_transaction
- * and end_transaction. Subvolume quota depends on this.
- */
- btrfs_qgroup_free(trans->root, trans->qgroup_reserved);
- trans->qgroup_reserved = 0;
- }
-
btrfs_trans_release_metadata(trans, root);
trans->block_rsv = NULL;
if (!list_empty(&trans->new_bgs))
btrfs_create_pending_block_groups(trans, root);
+ btrfs_trans_release_chunk_metadata(trans);
+
if (lock && !atomic_read(&root->fs_info->open_ioctl_trans) &&
should_end_transaction(trans, root) &&
ACCESS_ONCE(cur_trans->state) == TRANS_STATE_RUNNING) {
@@ -816,6 +857,9 @@ static int __btrfs_end_transaction(struct btrfs_trans_handle *trans,
atomic_dec(&cur_trans->num_writers);
extwriter_counter_dec(cur_trans, trans->type);
+ /*
+ * Make sure counter is updated before we wake up waiters.
+ */
smp_mb();
if (waitqueue_active(&cur_trans->writer_wait))
wake_up(&cur_trans->writer_wait);
@@ -1198,6 +1242,7 @@ static noinline int commit_fs_roots(struct btrfs_trans_handle *trans,
spin_lock(&fs_info->fs_roots_radix_lock);
if (err)
break;
+ btrfs_qgroup_free_meta_all(root);
}
}
spin_unlock(&fs_info->fs_roots_radix_lock);
@@ -1290,7 +1335,13 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans,
if (pending->error)
goto no_free_objectid;
- btrfs_reloc_pre_snapshot(trans, pending, &to_reserve);
+ /*
+ * Make qgroup to skip current new snapshot's qgroupid, as it is
+ * accounted by later btrfs_qgroup_inherit().
+ */
+ btrfs_set_skip_qgroup(trans, objectid);
+
+ btrfs_reloc_pre_snapshot(pending, &to_reserve);
if (to_reserve > 0) {
pending->error = btrfs_block_rsv_add(root,
@@ -1298,7 +1349,7 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans,
to_reserve,
BTRFS_RESERVE_NO_FLUSH);
if (pending->error)
- goto no_free_objectid;
+ goto clear_skip_qgroup;
}
key.objectid = objectid;
@@ -1396,25 +1447,6 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans,
btrfs_abort_transaction(trans, root, ret);
goto fail;
}
-
- /*
- * We need to flush delayed refs in order to make sure all of our quota
- * operations have been done before we call btrfs_qgroup_inherit.
- */
- ret = btrfs_run_delayed_refs(trans, root, (unsigned long)-1);
- if (ret) {
- btrfs_abort_transaction(trans, root, ret);
- goto fail;
- }
-
- ret = btrfs_qgroup_inherit(trans, fs_info,
- root->root_key.objectid,
- objectid, pending->inherit);
- if (ret) {
- btrfs_abort_transaction(trans, root, ret);
- goto fail;
- }
-
/* see comments in should_cow_block() */
set_bit(BTRFS_ROOT_FORCE_COW, &root->state);
smp_wmb();
@@ -1497,11 +1529,37 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans,
goto fail;
}
}
+
+ ret = btrfs_run_delayed_refs(trans, root, (unsigned long)-1);
+ if (ret) {
+ btrfs_abort_transaction(trans, root, ret);
+ goto fail;
+ }
+
+ /*
+ * account qgroup counters before qgroup_inherit()
+ */
+ ret = btrfs_qgroup_prepare_account_extents(trans, fs_info);
+ if (ret)
+ goto fail;
+ ret = btrfs_qgroup_account_extents(trans, fs_info);
+ if (ret)
+ goto fail;
+ ret = btrfs_qgroup_inherit(trans, fs_info,
+ root->root_key.objectid,
+ objectid, pending->inherit);
+ if (ret) {
+ btrfs_abort_transaction(trans, root, ret);
+ goto fail;
+ }
+
fail:
pending->error = ret;
dir_item_existed:
trans->block_rsv = rsv;
trans->bytes_reserved = 0;
+clear_skip_qgroup:
+ btrfs_clear_skip_qgroup(trans);
no_free_objectid:
kfree(new_root_item);
root_item_alloc_fail:
@@ -1620,9 +1678,7 @@ static void do_async_commit(struct work_struct *work)
* Tell lockdep about it.
*/
if (ac->newtrans->type & __TRANS_FREEZABLE)
- rwsem_acquire_read(
- &ac->root->fs_info->sb->s_writers.lock_map[SB_FREEZE_FS-1],
- 0, 1, _THIS_IP_);
+ __sb_writers_acquired(ac->root->fs_info->sb, SB_FREEZE_FS);
current->journal_info = ac->newtrans;
@@ -1661,9 +1717,7 @@ int btrfs_commit_transaction_async(struct btrfs_trans_handle *trans,
* async commit thread will be the one to unlock it.
*/
if (ac->newtrans->type & __TRANS_FREEZABLE)
- rwsem_release(
- &root->fs_info->sb->s_writers.lock_map[SB_FREEZE_FS-1],
- 1, _THIS_IP_);
+ __sb_writers_release(root->fs_info->sb, SB_FREEZE_FS);
schedule_work(&ac->work);
@@ -1746,25 +1800,10 @@ static inline void btrfs_wait_delalloc_flush(struct btrfs_fs_info *fs_info)
}
static inline void
-btrfs_wait_pending_ordered(struct btrfs_transaction *cur_trans,
- struct btrfs_fs_info *fs_info)
+btrfs_wait_pending_ordered(struct btrfs_transaction *cur_trans)
{
- struct btrfs_ordered_extent *ordered;
-
- spin_lock(&fs_info->trans_lock);
- while (!list_empty(&cur_trans->pending_ordered)) {
- ordered = list_first_entry(&cur_trans->pending_ordered,
- struct btrfs_ordered_extent,
- trans_list);
- list_del_init(&ordered->trans_list);
- spin_unlock(&fs_info->trans_lock);
-
- wait_event(ordered->wait, test_bit(BTRFS_ORDERED_COMPLETE,
- &ordered->flags));
- btrfs_put_ordered_extent(ordered);
- spin_lock(&fs_info->trans_lock);
- }
- spin_unlock(&fs_info->trans_lock);
+ wait_event(cur_trans->pending_wait,
+ atomic_read(&cur_trans->pending_ordered) == 0);
}
int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
@@ -1793,10 +1832,6 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
btrfs_trans_release_metadata(trans, root);
trans->block_rsv = NULL;
- if (trans->qgroup_reserved) {
- btrfs_qgroup_free(root, trans->qgroup_reserved);
- trans->qgroup_reserved = 0;
- }
cur_trans = trans->transaction;
@@ -1816,7 +1851,7 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
return ret;
}
- if (!cur_trans->dirty_bg_run) {
+ if (!test_bit(BTRFS_TRANS_DIRTY_BG_RUN, &cur_trans->flags)) {
int run_it = 0;
/* this mutex is also taken before trying to set
@@ -1825,18 +1860,17 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
* after a extents from that block group have been
* allocated for cache files. btrfs_set_block_group_ro
* will wait for the transaction to commit if it
- * finds dirty_bg_run = 1
+ * finds BTRFS_TRANS_DIRTY_BG_RUN set.
*
- * The dirty_bg_run flag is also used to make sure only
- * one process starts all the block group IO. It wouldn't
+ * The BTRFS_TRANS_DIRTY_BG_RUN flag is also used to make sure
+ * only one process starts all the block group IO. It wouldn't
* hurt to have more than one go through, but there's no
* real advantage to it either.
*/
mutex_lock(&root->fs_info->ro_block_group_mutex);
- if (!cur_trans->dirty_bg_run) {
+ if (!test_and_set_bit(BTRFS_TRANS_DIRTY_BG_RUN,
+ &cur_trans->flags))
run_it = 1;
- cur_trans->dirty_bg_run = 1;
- }
mutex_unlock(&root->fs_info->ro_block_group_mutex);
if (run_it)
@@ -1848,7 +1882,6 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
}
spin_lock(&root->fs_info->trans_lock);
- list_splice_init(&trans->ordered, &cur_trans->pending_ordered);
if (cur_trans->state >= TRANS_STATE_COMMIT_START) {
spin_unlock(&root->fs_info->trans_lock);
atomic_inc(&cur_trans->use_count);
@@ -1907,7 +1940,7 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
btrfs_wait_delalloc_flush(root->fs_info);
- btrfs_wait_pending_ordered(cur_trans, root->fs_info);
+ btrfs_wait_pending_ordered(cur_trans);
btrfs_scrub_pause(root);
/*
@@ -1966,6 +1999,13 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
goto scrub_continue;
}
+ /* Reocrd old roots for later qgroup accounting */
+ ret = btrfs_qgroup_prepare_account_extents(trans, root->fs_info);
+ if (ret) {
+ mutex_unlock(&root->fs_info->reloc_mutex);
+ goto scrub_continue;
+ }
+
/*
* make sure none of the code above managed to slip in a
* delayed item
@@ -2007,6 +2047,17 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
*/
btrfs_free_log_root_tree(trans, root->fs_info);
+ /*
+ * Since fs roots are all committed, we can get a quite accurate
+ * new_roots. So let's do quota accounting.
+ */
+ ret = btrfs_qgroup_account_extents(trans, root->fs_info);
+ if (ret < 0) {
+ mutex_unlock(&root->fs_info->tree_log_mutex);
+ mutex_unlock(&root->fs_info->reloc_mutex);
+ goto scrub_continue;
+ }
+
ret = commit_cowonly_roots(trans, root);
if (ret) {
mutex_unlock(&root->fs_info->tree_log_mutex);
@@ -2057,6 +2108,8 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
clear_bit(BTRFS_INODE_BTREE_LOG1_ERR, &btree_ino->runtime_flags);
clear_bit(BTRFS_INODE_BTREE_LOG2_ERR, &btree_ino->runtime_flags);
+ btrfs_trans_release_chunk_metadata(trans);
+
spin_lock(&root->fs_info->trans_lock);
cur_trans->state = TRANS_STATE_UNBLOCKED;
root->fs_info->running_transaction = NULL;
@@ -2067,7 +2120,7 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
ret = btrfs_write_and_wait_transaction(trans, root);
if (ret) {
- btrfs_error(root->fs_info, ret,
+ btrfs_std_error(root->fs_info, ret,
"Error while writing out transaction");
mutex_unlock(&root->fs_info->tree_log_mutex);
goto scrub_continue;
@@ -2087,7 +2140,7 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
btrfs_finish_extent_commit(trans, root);
- if (cur_trans->have_free_bgs)
+ if (test_bit(BTRFS_TRANS_HAVE_FREE_BGS, &cur_trans->flags))
btrfs_clear_space_info_full(root->fs_info);
root->fs_info->last_trans_committed = cur_trans->transid;
@@ -2117,7 +2170,8 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
kmem_cache_free(btrfs_trans_handle_cachep, trans);
- if (current != root->fs_info->transaction_kthread)
+ if (current != root->fs_info->transaction_kthread &&
+ current != root->fs_info->cleaner_kthread)
btrfs_run_delayed_iputs(root);
return ret;
@@ -2126,11 +2180,8 @@ scrub_continue:
btrfs_scrub_continue(root);
cleanup_transaction:
btrfs_trans_release_metadata(trans, root);
+ btrfs_trans_release_chunk_metadata(trans);
trans->block_rsv = NULL;
- if (trans->qgroup_reserved) {
- btrfs_qgroup_free(root, trans->qgroup_reserved);
- trans->qgroup_reserved = 0;
- }
btrfs_warn(root->fs_info, "Skipping commit of aborted transaction.");
if (current->journal_info == trans)
current->journal_info = NULL;
diff --git a/kernel/fs/btrfs/transaction.h b/kernel/fs/btrfs/transaction.h
index 0b2475559..64c8221b6 100644
--- a/kernel/fs/btrfs/transaction.h
+++ b/kernel/fs/btrfs/transaction.h
@@ -32,6 +32,10 @@ enum btrfs_trans_state {
TRANS_STATE_MAX = 6,
};
+#define BTRFS_TRANS_HAVE_FREE_BGS 0
+#define BTRFS_TRANS_DIRTY_BG_RUN 1
+#define BTRFS_TRANS_CACHE_ENOSPC 2
+
struct btrfs_transaction {
u64 transid;
/*
@@ -46,11 +50,9 @@ struct btrfs_transaction {
*/
atomic_t num_writers;
atomic_t use_count;
+ atomic_t pending_ordered;
- /*
- * true if there is free bgs operations in this transaction
- */
- int have_free_bgs;
+ unsigned long flags;
/* Be protected by fs_info->trans_lock when we want to change it. */
enum btrfs_trans_state state;
@@ -59,12 +61,13 @@ struct btrfs_transaction {
unsigned long start_time;
wait_queue_head_t writer_wait;
wait_queue_head_t commit_wait;
+ wait_queue_head_t pending_wait;
struct list_head pending_snapshots;
struct list_head pending_chunks;
- struct list_head pending_ordered;
struct list_head switch_commits;
struct list_head dirty_bgs;
struct list_head io_bgs;
+ struct list_head dropped_roots;
u64 num_dirty_bgs;
/*
@@ -74,9 +77,11 @@ struct btrfs_transaction {
*/
struct mutex cache_write_mutex;
spinlock_t dirty_bgs_lock;
+ /* Protected by spin lock fs_info->unused_bgs_lock. */
+ struct list_head deleted_bgs;
+ spinlock_t dropped_roots_lock;
struct btrfs_delayed_ref_root delayed_refs;
int aborted;
- int dirty_bg_run;
};
#define __TRANS_FREEZABLE (1U << 0)
@@ -102,7 +107,7 @@ struct btrfs_transaction {
struct btrfs_trans_handle {
u64 transid;
u64 bytes_reserved;
- u64 qgroup_reserved;
+ u64 chunk_bytes_reserved;
unsigned long use_count;
unsigned long blocks_reserved;
unsigned long blocks_used;
@@ -113,6 +118,7 @@ struct btrfs_trans_handle {
short aborted;
short adding_csums;
bool allocating_chunk;
+ bool can_flush_pending_bgs;
bool reloc_reserved;
bool sync;
unsigned int type;
@@ -123,7 +129,6 @@ struct btrfs_trans_handle {
*/
struct btrfs_root *root;
struct seq_list delayed_ref_elem;
- struct list_head ordered;
struct list_head qgroup_ref_list;
struct list_head new_bgs;
};
@@ -153,12 +158,40 @@ static inline void btrfs_set_inode_last_trans(struct btrfs_trans_handle *trans,
spin_unlock(&BTRFS_I(inode)->lock);
}
+/*
+ * Make qgroup codes to skip given qgroupid, means the old/new_roots for
+ * qgroup won't contain the qgroupid in it.
+ */
+static inline void btrfs_set_skip_qgroup(struct btrfs_trans_handle *trans,
+ u64 qgroupid)
+{
+ struct btrfs_delayed_ref_root *delayed_refs;
+
+ delayed_refs = &trans->transaction->delayed_refs;
+ WARN_ON(delayed_refs->qgroup_to_skip);
+ delayed_refs->qgroup_to_skip = qgroupid;
+}
+
+static inline void btrfs_clear_skip_qgroup(struct btrfs_trans_handle *trans)
+{
+ struct btrfs_delayed_ref_root *delayed_refs;
+
+ delayed_refs = &trans->transaction->delayed_refs;
+ WARN_ON(!delayed_refs->qgroup_to_skip);
+ delayed_refs->qgroup_to_skip = 0;
+}
+
int btrfs_end_transaction(struct btrfs_trans_handle *trans,
struct btrfs_root *root);
struct btrfs_trans_handle *btrfs_start_transaction(struct btrfs_root *root,
- int num_items);
+ unsigned int num_items);
+struct btrfs_trans_handle *btrfs_start_transaction_fallback_global_rsv(
+ struct btrfs_root *root,
+ unsigned int num_items,
+ int min_factor);
struct btrfs_trans_handle *btrfs_start_transaction_lflush(
- struct btrfs_root *root, int num_items);
+ struct btrfs_root *root,
+ unsigned int num_items);
struct btrfs_trans_handle *btrfs_join_transaction(struct btrfs_root *root);
struct btrfs_trans_handle *btrfs_join_transaction_nolock(struct btrfs_root *root);
struct btrfs_trans_handle *btrfs_attach_transaction(struct btrfs_root *root);
@@ -190,5 +223,6 @@ int btrfs_transaction_blocked(struct btrfs_fs_info *info);
int btrfs_transaction_in_commit(struct btrfs_fs_info *info);
void btrfs_put_transaction(struct btrfs_transaction *transaction);
void btrfs_apply_pending_changes(struct btrfs_fs_info *fs_info);
-
+void btrfs_add_dropped_root(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root);
#endif
diff --git a/kernel/fs/btrfs/tree-defrag.c b/kernel/fs/btrfs/tree-defrag.c
index a63719cc9..f31db4325 100644
--- a/kernel/fs/btrfs/tree-defrag.c
+++ b/kernel/fs/btrfs/tree-defrag.c
@@ -52,9 +52,6 @@ int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
if (!test_bit(BTRFS_ROOT_REF_COWS, &root->state))
goto out;
- if (btrfs_test_opt(root, SSD))
- goto out;
-
path = btrfs_alloc_path();
if (!path)
return -ENOMEM;
@@ -118,8 +115,7 @@ int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
ret = -EAGAIN;
}
out:
- if (path)
- btrfs_free_path(path);
+ btrfs_free_path(path);
if (ret == -EAGAIN) {
if (root->defrag_max.objectid > root->defrag_progress.objectid)
goto done;
diff --git a/kernel/fs/btrfs/tree-log.c b/kernel/fs/btrfs/tree-log.c
index 4920fceff..323e12cc9 100644
--- a/kernel/fs/btrfs/tree-log.c
+++ b/kernel/fs/btrfs/tree-log.c
@@ -140,55 +140,46 @@ static int start_log_trans(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct btrfs_log_ctx *ctx)
{
- int index;
- int ret;
+ int ret = 0;
mutex_lock(&root->log_mutex);
+
if (root->log_root) {
if (btrfs_need_log_full_commit(root->fs_info, trans)) {
ret = -EAGAIN;
goto out;
}
+
if (!root->log_start_pid) {
- root->log_start_pid = current->pid;
clear_bit(BTRFS_ROOT_MULTI_LOG_TASKS, &root->state);
+ root->log_start_pid = current->pid;
} else if (root->log_start_pid != current->pid) {
set_bit(BTRFS_ROOT_MULTI_LOG_TASKS, &root->state);
}
+ } else {
+ mutex_lock(&root->fs_info->tree_log_mutex);
+ if (!root->fs_info->log_root_tree)
+ ret = btrfs_init_log_root_tree(trans, root->fs_info);
+ mutex_unlock(&root->fs_info->tree_log_mutex);
+ if (ret)
+ goto out;
- atomic_inc(&root->log_batch);
- atomic_inc(&root->log_writers);
- if (ctx) {
- index = root->log_transid % 2;
- list_add_tail(&ctx->list, &root->log_ctxs[index]);
- ctx->log_transid = root->log_transid;
- }
- mutex_unlock(&root->log_mutex);
- return 0;
- }
-
- ret = 0;
- mutex_lock(&root->fs_info->tree_log_mutex);
- if (!root->fs_info->log_root_tree)
- ret = btrfs_init_log_root_tree(trans, root->fs_info);
- mutex_unlock(&root->fs_info->tree_log_mutex);
- if (ret)
- goto out;
-
- if (!root->log_root) {
ret = btrfs_add_log_tree(trans, root);
if (ret)
goto out;
+
+ clear_bit(BTRFS_ROOT_MULTI_LOG_TASKS, &root->state);
+ root->log_start_pid = current->pid;
}
- clear_bit(BTRFS_ROOT_MULTI_LOG_TASKS, &root->state);
- root->log_start_pid = current->pid;
+
atomic_inc(&root->log_batch);
atomic_inc(&root->log_writers);
if (ctx) {
- index = root->log_transid % 2;
+ int index = root->log_transid % 2;
list_add_tail(&ctx->list, &root->log_ctxs[index]);
ctx->log_transid = root->log_transid;
}
+
out:
mutex_unlock(&root->log_mutex);
return ret;
@@ -238,7 +229,9 @@ int btrfs_pin_log_trans(struct btrfs_root *root)
void btrfs_end_log_trans(struct btrfs_root *root)
{
if (atomic_dec_and_test(&root->log_writers)) {
- smp_mb();
+ /*
+ * Implicit memory barrier after atomic_dec_and_test
+ */
if (waitqueue_active(&root->log_writer_wait))
wake_up(&root->log_writer_wait);
}
@@ -700,7 +693,7 @@ static noinline int replay_one_extent(struct btrfs_trans_handle *trans,
ret = btrfs_inc_extent_ref(trans, root,
ins.objectid, ins.offset,
0, root->root_key.objectid,
- key->objectid, offset, 0);
+ key->objectid, offset);
if (ret)
goto out;
} else {
@@ -731,12 +724,66 @@ static noinline int replay_one_extent(struct btrfs_trans_handle *trans,
&ordered_sums, 0);
if (ret)
goto out;
+ /*
+ * Now delete all existing cums in the csum root that
+ * cover our range. We do this because we can have an
+ * extent that is completely referenced by one file
+ * extent item and partially referenced by another
+ * file extent item (like after using the clone or
+ * extent_same ioctls). In this case if we end up doing
+ * the replay of the one that partially references the
+ * extent first, and we do not do the csum deletion
+ * below, we can get 2 csum items in the csum tree that
+ * overlap each other. For example, imagine our log has
+ * the two following file extent items:
+ *
+ * key (257 EXTENT_DATA 409600)
+ * extent data disk byte 12845056 nr 102400
+ * extent data offset 20480 nr 20480 ram 102400
+ *
+ * key (257 EXTENT_DATA 819200)
+ * extent data disk byte 12845056 nr 102400
+ * extent data offset 0 nr 102400 ram 102400
+ *
+ * Where the second one fully references the 100K extent
+ * that starts at disk byte 12845056, and the log tree
+ * has a single csum item that covers the entire range
+ * of the extent:
+ *
+ * key (EXTENT_CSUM EXTENT_CSUM 12845056) itemsize 100
+ *
+ * After the first file extent item is replayed, the
+ * csum tree gets the following csum item:
+ *
+ * key (EXTENT_CSUM EXTENT_CSUM 12865536) itemsize 20
+ *
+ * Which covers the 20K sub-range starting at offset 20K
+ * of our extent. Now when we replay the second file
+ * extent item, if we do not delete existing csum items
+ * that cover any of its blocks, we end up getting two
+ * csum items in our csum tree that overlap each other:
+ *
+ * key (EXTENT_CSUM EXTENT_CSUM 12845056) itemsize 100
+ * key (EXTENT_CSUM EXTENT_CSUM 12865536) itemsize 20
+ *
+ * Which is a problem, because after this anyone trying
+ * to lookup up for the checksum of any block of our
+ * extent starting at an offset of 40K or higher, will
+ * end up looking at the second csum item only, which
+ * does not contain the checksum for any block starting
+ * at offset 40K or higher of our extent.
+ */
while (!list_empty(&ordered_sums)) {
struct btrfs_ordered_sum *sums;
sums = list_entry(ordered_sums.next,
struct btrfs_ordered_sum,
list);
if (!ret)
+ ret = btrfs_del_csums(trans,
+ root->fs_info->csum_root,
+ sums->bytenr,
+ sums->len);
+ if (!ret)
ret = btrfs_csum_file_blocks(trans,
root->fs_info->csum_root,
sums);
@@ -1549,9 +1596,8 @@ static noinline int link_to_fixup_dir(struct btrfs_trans_handle *trans,
*/
static noinline int insert_one_name(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
- struct btrfs_path *path,
u64 dirid, u64 index,
- char *name, int name_len, u8 type,
+ char *name, int name_len,
struct btrfs_key *location)
{
struct inode *inode;
@@ -1613,6 +1659,9 @@ static bool name_in_log_ref(struct btrfs_root *log_root,
* not exist in the FS, it is skipped. fsyncs on directories
* do not force down inodes inside that directory, just changes to the
* names or unlinks in a directory.
+ *
+ * Returns < 0 on error, 0 if the name wasn't replayed (dentry points to a
+ * non-existing inode) and 1 if the name was replayed.
*/
static noinline int replay_one_name(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
@@ -1631,6 +1680,7 @@ static noinline int replay_one_name(struct btrfs_trans_handle *trans,
int exists;
int ret = 0;
bool update_size = (key->type == BTRFS_DIR_INDEX_KEY);
+ bool name_added = false;
dir = read_one_inode(root, key->objectid);
if (!dir)
@@ -1708,6 +1758,8 @@ out:
}
kfree(name);
iput(dir);
+ if (!ret && name_added)
+ ret = 1;
return ret;
insert:
@@ -1719,10 +1771,12 @@ insert:
goto out;
}
btrfs_release_path(path);
- ret = insert_one_name(trans, root, path, key->objectid, key->offset,
- name, name_len, log_type, &log_key);
+ ret = insert_one_name(trans, root, key->objectid, key->offset,
+ name, name_len, &log_key);
if (ret && ret != -ENOENT && ret != -EEXIST)
goto out;
+ if (!ret)
+ name_added = true;
update_size = false;
ret = 0;
goto out;
@@ -1740,12 +1794,13 @@ static noinline int replay_one_dir_item(struct btrfs_trans_handle *trans,
struct extent_buffer *eb, int slot,
struct btrfs_key *key)
{
- int ret;
+ int ret = 0;
u32 item_size = btrfs_item_size_nr(eb, slot);
struct btrfs_dir_item *di;
int name_len;
unsigned long ptr;
unsigned long ptr_end;
+ struct btrfs_path *fixup_path = NULL;
ptr = btrfs_item_ptr_offset(eb, slot);
ptr_end = ptr + item_size;
@@ -1755,12 +1810,59 @@ static noinline int replay_one_dir_item(struct btrfs_trans_handle *trans,
return -EIO;
name_len = btrfs_dir_name_len(eb, di);
ret = replay_one_name(trans, root, path, eb, di, key);
- if (ret)
- return ret;
+ if (ret < 0)
+ break;
ptr = (unsigned long)(di + 1);
ptr += name_len;
+
+ /*
+ * If this entry refers to a non-directory (directories can not
+ * have a link count > 1) and it was added in the transaction
+ * that was not committed, make sure we fixup the link count of
+ * the inode it the entry points to. Otherwise something like
+ * the following would result in a directory pointing to an
+ * inode with a wrong link that does not account for this dir
+ * entry:
+ *
+ * mkdir testdir
+ * touch testdir/foo
+ * touch testdir/bar
+ * sync
+ *
+ * ln testdir/bar testdir/bar_link
+ * ln testdir/foo testdir/foo_link
+ * xfs_io -c "fsync" testdir/bar
+ *
+ * <power failure>
+ *
+ * mount fs, log replay happens
+ *
+ * File foo would remain with a link count of 1 when it has two
+ * entries pointing to it in the directory testdir. This would
+ * make it impossible to ever delete the parent directory has
+ * it would result in stale dentries that can never be deleted.
+ */
+ if (ret == 1 && btrfs_dir_type(eb, di) != BTRFS_FT_DIR) {
+ struct btrfs_key di_key;
+
+ if (!fixup_path) {
+ fixup_path = btrfs_alloc_path();
+ if (!fixup_path) {
+ ret = -ENOMEM;
+ break;
+ }
+ }
+
+ btrfs_dir_item_key_to_cpu(eb, di, &di_key);
+ ret = link_to_fixup_dir(trans, root, fixup_path,
+ di_key.objectid);
+ if (ret)
+ break;
+ }
+ ret = 0;
}
- return 0;
+ btrfs_free_path(fixup_path);
+ return ret;
}
/*
@@ -2535,8 +2637,7 @@ static int update_log_root(struct btrfs_trans_handle *trans,
return ret;
}
-static void wait_log_commit(struct btrfs_trans_handle *trans,
- struct btrfs_root *root, int transid)
+static void wait_log_commit(struct btrfs_root *root, int transid)
{
DEFINE_WAIT(wait);
int index = transid % 2;
@@ -2561,8 +2662,7 @@ static void wait_log_commit(struct btrfs_trans_handle *trans,
atomic_read(&root->log_commit[index]));
}
-static void wait_for_writer(struct btrfs_trans_handle *trans,
- struct btrfs_root *root)
+static void wait_for_writer(struct btrfs_root *root)
{
DEFINE_WAIT(wait);
@@ -2642,7 +2742,7 @@ int btrfs_sync_log(struct btrfs_trans_handle *trans,
index1 = log_transid % 2;
if (atomic_read(&root->log_commit[index1])) {
- wait_log_commit(trans, root, log_transid);
+ wait_log_commit(root, log_transid);
mutex_unlock(&root->log_mutex);
return ctx->log_ret;
}
@@ -2651,7 +2751,7 @@ int btrfs_sync_log(struct btrfs_trans_handle *trans,
/* wait for previous tree log sync to complete */
if (atomic_read(&root->log_commit[(index1 + 1) % 2]))
- wait_log_commit(trans, root, log_transid - 1);
+ wait_log_commit(root, log_transid - 1);
while (1) {
int batch = atomic_read(&root->log_batch);
@@ -2662,7 +2762,7 @@ int btrfs_sync_log(struct btrfs_trans_handle *trans,
schedule_timeout_uninterruptible(1);
mutex_lock(&root->log_mutex);
}
- wait_for_writer(trans, root);
+ wait_for_writer(root);
if (batch == atomic_read(&root->log_batch))
break;
}
@@ -2722,7 +2822,9 @@ int btrfs_sync_log(struct btrfs_trans_handle *trans,
mutex_lock(&log_root_tree->log_mutex);
if (atomic_dec_and_test(&log_root_tree->log_writers)) {
- smp_mb();
+ /*
+ * Implicit memory barrier after atomic_dec_and_test
+ */
if (waitqueue_active(&log_root_tree->log_writer_wait))
wake_up(&log_root_tree->log_writer_wait);
}
@@ -2759,7 +2861,7 @@ int btrfs_sync_log(struct btrfs_trans_handle *trans,
ret = btrfs_wait_marked_extents(log, &log->dirty_log_pages,
mark);
btrfs_wait_logged_extents(trans, log, log_transid);
- wait_log_commit(trans, log_root_tree,
+ wait_log_commit(log_root_tree,
root_log_ctx.log_transid);
mutex_unlock(&log_root_tree->log_mutex);
if (!ret)
@@ -2770,11 +2872,11 @@ int btrfs_sync_log(struct btrfs_trans_handle *trans,
atomic_set(&log_root_tree->log_commit[index2], 1);
if (atomic_read(&log_root_tree->log_commit[(index2 + 1) % 2])) {
- wait_log_commit(trans, log_root_tree,
+ wait_log_commit(log_root_tree,
root_log_ctx.log_transid - 1);
}
- wait_for_writer(trans, log_root_tree);
+ wait_for_writer(log_root_tree);
/*
* now that we've moved on to the tree of log tree roots,
@@ -2852,6 +2954,9 @@ out_wake_log_root:
atomic_set(&log_root_tree->log_commit[index2], 0);
mutex_unlock(&log_root_tree->log_mutex);
+ /*
+ * The barrier before waitqueue_active is implied by mutex_unlock
+ */
if (waitqueue_active(&log_root_tree->log_commit_wait[index2]))
wake_up(&log_root_tree->log_commit_wait[index2]);
out:
@@ -2863,6 +2968,9 @@ out:
atomic_set(&root->log_commit[index1], 0);
mutex_unlock(&root->log_mutex);
+ /*
+ * The barrier before waitqueue_active is implied by mutex_unlock
+ */
if (waitqueue_active(&root->log_commit_wait[index1]))
wake_up(&root->log_commit_wait[index1]);
return ret;
@@ -3881,12 +3989,6 @@ static int wait_ordered_extents(struct btrfs_trans_handle *trans,
&ordered->flags))
continue;
- if (ordered->csum_bytes_left) {
- btrfs_start_ordered_extent(inode, ordered, 0);
- wait_event(ordered->wait,
- ordered->csum_bytes_left == 0);
- }
-
list_for_each_entry(sum, &ordered->list, list) {
ret = btrfs_csum_file_blocks(trans, log, sum);
if (ret)
@@ -4123,6 +4225,187 @@ static int logged_inode_size(struct btrfs_root *log, struct inode *inode,
return 0;
}
+/*
+ * At the moment we always log all xattrs. This is to figure out at log replay
+ * time which xattrs must have their deletion replayed. If a xattr is missing
+ * in the log tree and exists in the fs/subvol tree, we delete it. This is
+ * because if a xattr is deleted, the inode is fsynced and a power failure
+ * happens, causing the log to be replayed the next time the fs is mounted,
+ * we want the xattr to not exist anymore (same behaviour as other filesystems
+ * with a journal, ext3/4, xfs, f2fs, etc).
+ */
+static int btrfs_log_all_xattrs(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root,
+ struct inode *inode,
+ struct btrfs_path *path,
+ struct btrfs_path *dst_path)
+{
+ int ret;
+ struct btrfs_key key;
+ const u64 ino = btrfs_ino(inode);
+ int ins_nr = 0;
+ int start_slot = 0;
+
+ key.objectid = ino;
+ key.type = BTRFS_XATTR_ITEM_KEY;
+ key.offset = 0;
+
+ ret = btrfs_search_slot(NULL, root, &key, path, 0, 0);
+ if (ret < 0)
+ return ret;
+
+ while (true) {
+ int slot = path->slots[0];
+ struct extent_buffer *leaf = path->nodes[0];
+ int nritems = btrfs_header_nritems(leaf);
+
+ if (slot >= nritems) {
+ if (ins_nr > 0) {
+ u64 last_extent = 0;
+
+ ret = copy_items(trans, inode, dst_path, path,
+ &last_extent, start_slot,
+ ins_nr, 1, 0);
+ /* can't be 1, extent items aren't processed */
+ ASSERT(ret <= 0);
+ if (ret < 0)
+ return ret;
+ ins_nr = 0;
+ }
+ ret = btrfs_next_leaf(root, path);
+ if (ret < 0)
+ return ret;
+ else if (ret > 0)
+ break;
+ continue;
+ }
+
+ btrfs_item_key_to_cpu(leaf, &key, slot);
+ if (key.objectid != ino || key.type != BTRFS_XATTR_ITEM_KEY)
+ break;
+
+ if (ins_nr == 0)
+ start_slot = slot;
+ ins_nr++;
+ path->slots[0]++;
+ cond_resched();
+ }
+ if (ins_nr > 0) {
+ u64 last_extent = 0;
+
+ ret = copy_items(trans, inode, dst_path, path,
+ &last_extent, start_slot,
+ ins_nr, 1, 0);
+ /* can't be 1, extent items aren't processed */
+ ASSERT(ret <= 0);
+ if (ret < 0)
+ return ret;
+ }
+
+ return 0;
+}
+
+/*
+ * If the no holes feature is enabled we need to make sure any hole between the
+ * last extent and the i_size of our inode is explicitly marked in the log. This
+ * is to make sure that doing something like:
+ *
+ * 1) create file with 128Kb of data
+ * 2) truncate file to 64Kb
+ * 3) truncate file to 256Kb
+ * 4) fsync file
+ * 5) <crash/power failure>
+ * 6) mount fs and trigger log replay
+ *
+ * Will give us a file with a size of 256Kb, the first 64Kb of data match what
+ * the file had in its first 64Kb of data at step 1 and the last 192Kb of the
+ * file correspond to a hole. The presence of explicit holes in a log tree is
+ * what guarantees that log replay will remove/adjust file extent items in the
+ * fs/subvol tree.
+ *
+ * Here we do not need to care about holes between extents, that is already done
+ * by copy_items(). We also only need to do this in the full sync path, where we
+ * lookup for extents from the fs/subvol tree only. In the fast path case, we
+ * lookup the list of modified extent maps and if any represents a hole, we
+ * insert a corresponding extent representing a hole in the log tree.
+ */
+static int btrfs_log_trailing_hole(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root,
+ struct inode *inode,
+ struct btrfs_path *path)
+{
+ int ret;
+ struct btrfs_key key;
+ u64 hole_start;
+ u64 hole_size;
+ struct extent_buffer *leaf;
+ struct btrfs_root *log = root->log_root;
+ const u64 ino = btrfs_ino(inode);
+ const u64 i_size = i_size_read(inode);
+
+ if (!btrfs_fs_incompat(root->fs_info, NO_HOLES))
+ return 0;
+
+ key.objectid = ino;
+ key.type = BTRFS_EXTENT_DATA_KEY;
+ key.offset = (u64)-1;
+
+ ret = btrfs_search_slot(NULL, root, &key, path, 0, 0);
+ ASSERT(ret != 0);
+ if (ret < 0)
+ return ret;
+
+ ASSERT(path->slots[0] > 0);
+ path->slots[0]--;
+ leaf = path->nodes[0];
+ btrfs_item_key_to_cpu(leaf, &key, path->slots[0]);
+
+ if (key.objectid != ino || key.type != BTRFS_EXTENT_DATA_KEY) {
+ /* inode does not have any extents */
+ hole_start = 0;
+ hole_size = i_size;
+ } else {
+ struct btrfs_file_extent_item *extent;
+ u64 len;
+
+ /*
+ * If there's an extent beyond i_size, an explicit hole was
+ * already inserted by copy_items().
+ */
+ if (key.offset >= i_size)
+ return 0;
+
+ extent = btrfs_item_ptr(leaf, path->slots[0],
+ struct btrfs_file_extent_item);
+
+ if (btrfs_file_extent_type(leaf, extent) ==
+ BTRFS_FILE_EXTENT_INLINE) {
+ len = btrfs_file_extent_inline_len(leaf,
+ path->slots[0],
+ extent);
+ ASSERT(len == i_size);
+ return 0;
+ }
+
+ len = btrfs_file_extent_num_bytes(leaf, extent);
+ /* Last extent goes beyond i_size, no need to log a hole. */
+ if (key.offset + len > i_size)
+ return 0;
+ hole_start = key.offset + len;
+ hole_size = i_size - hole_start;
+ }
+ btrfs_release_path(path);
+
+ /* Last extent ends at i_size. */
+ if (hole_size == 0)
+ return 0;
+
+ hole_size = ALIGN(hole_size, root->sectorsize);
+ ret = btrfs_insert_file_extent(trans, log, ino, hole_start, 0, 0,
+ hole_size, 0, hole_size, 0, 0, 0);
+ return ret;
+}
+
/* log a single inode in the tree log.
* At least one parent directory for this inode must exist in the tree
* or be logged already.
@@ -4295,6 +4578,25 @@ again:
if (min_key.type == BTRFS_INODE_ITEM_KEY)
need_log_inode_item = false;
+ /* Skip xattrs, we log them later with btrfs_log_all_xattrs() */
+ if (min_key.type == BTRFS_XATTR_ITEM_KEY) {
+ if (ins_nr == 0)
+ goto next_slot;
+ ret = copy_items(trans, inode, dst_path, path,
+ &last_extent, ins_start_slot,
+ ins_nr, inode_only, logged_isize);
+ if (ret < 0) {
+ err = ret;
+ goto out_unlock;
+ }
+ ins_nr = 0;
+ if (ret) {
+ btrfs_release_path(path);
+ continue;
+ }
+ goto next_slot;
+ }
+
src = path->nodes[0];
if (ins_nr && ins_start_slot + ins_nr == path->slots[0]) {
ins_nr++;
@@ -4362,6 +4664,18 @@ next_slot:
ins_nr = 0;
}
+ btrfs_release_path(path);
+ btrfs_release_path(dst_path);
+ err = btrfs_log_all_xattrs(trans, root, inode, path, dst_path);
+ if (err)
+ goto out_unlock;
+ if (max_key.type >= BTRFS_EXTENT_DATA_KEY && !fast_search) {
+ btrfs_release_path(path);
+ btrfs_release_path(dst_path);
+ err = btrfs_log_trailing_hole(trans, root, inode, path);
+ if (err)
+ goto out_unlock;
+ }
log_extents:
btrfs_release_path(path);
btrfs_release_path(dst_path);
@@ -4698,6 +5012,94 @@ next_dir_inode:
return ret;
}
+static int btrfs_log_all_parents(struct btrfs_trans_handle *trans,
+ struct inode *inode,
+ struct btrfs_log_ctx *ctx)
+{
+ int ret;
+ struct btrfs_path *path;
+ struct btrfs_key key;
+ struct btrfs_root *root = BTRFS_I(inode)->root;
+ const u64 ino = btrfs_ino(inode);
+
+ path = btrfs_alloc_path();
+ if (!path)
+ return -ENOMEM;
+ path->skip_locking = 1;
+ path->search_commit_root = 1;
+
+ key.objectid = ino;
+ key.type = BTRFS_INODE_REF_KEY;
+ key.offset = 0;
+ ret = btrfs_search_slot(NULL, root, &key, path, 0, 0);
+ if (ret < 0)
+ goto out;
+
+ while (true) {
+ struct extent_buffer *leaf = path->nodes[0];
+ int slot = path->slots[0];
+ u32 cur_offset = 0;
+ u32 item_size;
+ unsigned long ptr;
+
+ if (slot >= btrfs_header_nritems(leaf)) {
+ ret = btrfs_next_leaf(root, path);
+ if (ret < 0)
+ goto out;
+ else if (ret > 0)
+ break;
+ continue;
+ }
+
+ btrfs_item_key_to_cpu(leaf, &key, slot);
+ /* BTRFS_INODE_EXTREF_KEY is BTRFS_INODE_REF_KEY + 1 */
+ if (key.objectid != ino || key.type > BTRFS_INODE_EXTREF_KEY)
+ break;
+
+ item_size = btrfs_item_size_nr(leaf, slot);
+ ptr = btrfs_item_ptr_offset(leaf, slot);
+ while (cur_offset < item_size) {
+ struct btrfs_key inode_key;
+ struct inode *dir_inode;
+
+ inode_key.type = BTRFS_INODE_ITEM_KEY;
+ inode_key.offset = 0;
+
+ if (key.type == BTRFS_INODE_EXTREF_KEY) {
+ struct btrfs_inode_extref *extref;
+
+ extref = (struct btrfs_inode_extref *)
+ (ptr + cur_offset);
+ inode_key.objectid = btrfs_inode_extref_parent(
+ leaf, extref);
+ cur_offset += sizeof(*extref);
+ cur_offset += btrfs_inode_extref_name_len(leaf,
+ extref);
+ } else {
+ inode_key.objectid = key.offset;
+ cur_offset = item_size;
+ }
+
+ dir_inode = btrfs_iget(root->fs_info->sb, &inode_key,
+ root, NULL);
+ /* If parent inode was deleted, skip it. */
+ if (IS_ERR(dir_inode))
+ continue;
+
+ ret = btrfs_log_inode(trans, root, dir_inode,
+ LOG_INODE_ALL, 0, LLONG_MAX, ctx);
+ iput(dir_inode);
+ if (ret)
+ goto out;
+ }
+ path->slots[0]++;
+ }
+ ret = 0;
+out:
+ btrfs_free_path(path);
+ return ret;
+}
+
/*
* helper function around btrfs_log_inode to make sure newly created
* parent directories also end up in the log. A minimal inode and backref
@@ -4717,9 +5119,6 @@ static int btrfs_log_inode_parent(struct btrfs_trans_handle *trans,
struct dentry *old_parent = NULL;
int ret = 0;
u64 last_committed = root->fs_info->last_trans_committed;
- const struct dentry * const first_parent = parent;
- const bool did_unlink = (BTRFS_I(inode)->last_unlink_trans >
- last_committed);
bool log_dentries = false;
struct inode *orig_inode = inode;
@@ -4780,6 +5179,53 @@ static int btrfs_log_inode_parent(struct btrfs_trans_handle *trans,
if (S_ISDIR(inode->i_mode) && ctx && ctx->log_new_dentries)
log_dentries = true;
+ /*
+ * On unlink we must make sure all our current and old parent directores
+ * inodes are fully logged. This is to prevent leaving dangling
+ * directory index entries in directories that were our parents but are
+ * not anymore. Not doing this results in old parent directory being
+ * impossible to delete after log replay (rmdir will always fail with
+ * error -ENOTEMPTY).
+ *
+ * Example 1:
+ *
+ * mkdir testdir
+ * touch testdir/foo
+ * ln testdir/foo testdir/bar
+ * sync
+ * unlink testdir/bar
+ * xfs_io -c fsync testdir/foo
+ * <power failure>
+ * mount fs, triggers log replay
+ *
+ * If we don't log the parent directory (testdir), after log replay the
+ * directory still has an entry pointing to the file inode using the bar
+ * name, but a matching BTRFS_INODE_[REF|EXTREF]_KEY does not exist and
+ * the file inode has a link count of 1.
+ *
+ * Example 2:
+ *
+ * mkdir testdir
+ * touch foo
+ * ln foo testdir/foo2
+ * ln foo testdir/foo3
+ * sync
+ * unlink testdir/foo3
+ * xfs_io -c fsync foo
+ * <power failure>
+ * mount fs, triggers log replay
+ *
+ * Similar as the first example, after log replay the parent directory
+ * testdir still has an entry pointing to the inode file with name foo3
+ * but the file inode does not have a matching BTRFS_INODE_REF_KEY item
+ * and has a link count of 2.
+ */
+ if (BTRFS_I(inode)->last_unlink_trans > last_committed) {
+ ret = btrfs_log_all_parents(trans, orig_inode, ctx);
+ if (ret)
+ goto end_trans;
+ }
+
while (1) {
if (!parent || d_really_is_negative(parent) || sb != d_inode(parent)->i_sb)
break;
@@ -4788,23 +5234,9 @@ static int btrfs_log_inode_parent(struct btrfs_trans_handle *trans,
if (root != BTRFS_I(inode)->root)
break;
- /*
- * On unlink we must make sure our immediate parent directory
- * inode is fully logged. This is to prevent leaving dangling
- * directory index entries and a wrong directory inode's i_size.
- * Not doing so can result in a directory being impossible to
- * delete after log replay (rmdir will always fail with error
- * -ENOTEMPTY).
- */
- if (did_unlink && parent == first_parent)
- inode_only = LOG_INODE_ALL;
- else
- inode_only = LOG_INODE_EXISTS;
-
- if (BTRFS_I(inode)->generation >
- root->fs_info->last_trans_committed ||
- inode_only == LOG_INODE_ALL) {
- ret = btrfs_log_inode(trans, root, inode, inode_only,
+ if (BTRFS_I(inode)->generation > last_committed) {
+ ret = btrfs_log_inode(trans, root, inode,
+ LOG_INODE_EXISTS,
0, LLONG_MAX, ctx);
if (ret)
goto end_trans;
@@ -4892,7 +5324,7 @@ int btrfs_recover_log_trees(struct btrfs_root *log_root_tree)
ret = walk_log_tree(trans, log_root_tree, &wc);
if (ret) {
- btrfs_error(fs_info, ret, "Failed to pin buffers while "
+ btrfs_std_error(fs_info, ret, "Failed to pin buffers while "
"recovering log root tree.");
goto error;
}
@@ -4906,7 +5338,7 @@ again:
ret = btrfs_search_slot(NULL, log_root_tree, &key, path, 0, 0);
if (ret < 0) {
- btrfs_error(fs_info, ret,
+ btrfs_std_error(fs_info, ret,
"Couldn't find tree log root.");
goto error;
}
@@ -4924,7 +5356,7 @@ again:
log = btrfs_read_fs_root(log_root_tree, &found_key);
if (IS_ERR(log)) {
ret = PTR_ERR(log);
- btrfs_error(fs_info, ret,
+ btrfs_std_error(fs_info, ret,
"Couldn't read tree log root.");
goto error;
}
@@ -4939,7 +5371,7 @@ again:
free_extent_buffer(log->node);
free_extent_buffer(log->commit_root);
kfree(log);
- btrfs_error(fs_info, ret, "Couldn't read target root "
+ btrfs_std_error(fs_info, ret, "Couldn't read target root "
"for tree log recovery.");
goto error;
}
diff --git a/kernel/fs/btrfs/ulist.c b/kernel/fs/btrfs/ulist.c
index 840a38b27..91feb2bde 100644
--- a/kernel/fs/btrfs/ulist.c
+++ b/kernel/fs/btrfs/ulist.c
@@ -132,6 +132,15 @@ static struct ulist_node *ulist_rbtree_search(struct ulist *ulist, u64 val)
return NULL;
}
+static void ulist_rbtree_erase(struct ulist *ulist, struct ulist_node *node)
+{
+ rb_erase(&node->rb_node, &ulist->root);
+ list_del(&node->list);
+ kfree(node);
+ BUG_ON(ulist->nnodes == 0);
+ ulist->nnodes--;
+}
+
static int ulist_rbtree_insert(struct ulist *ulist, struct ulist_node *ins)
{
struct rb_node **p = &ulist->root.rb_node;
@@ -197,9 +206,6 @@ int ulist_add_merge(struct ulist *ulist, u64 val, u64 aux,
node->val = val;
node->aux = aux;
-#ifdef CONFIG_BTRFS_DEBUG
- node->seqnum = ulist->nnodes;
-#endif
ret = ulist_rbtree_insert(ulist, node);
ASSERT(!ret);
@@ -209,6 +215,33 @@ int ulist_add_merge(struct ulist *ulist, u64 val, u64 aux,
return 1;
}
+/*
+ * ulist_del - delete one node from ulist
+ * @ulist: ulist to remove node from
+ * @val: value to delete
+ * @aux: aux to delete
+ *
+ * The deletion will only be done when *BOTH* val and aux matches.
+ * Return 0 for successful delete.
+ * Return > 0 for not found.
+ */
+int ulist_del(struct ulist *ulist, u64 val, u64 aux)
+{
+ struct ulist_node *node;
+
+ node = ulist_rbtree_search(ulist, val);
+ /* Not found */
+ if (!node)
+ return 1;
+
+ if (node->aux != aux)
+ return 1;
+
+ /* Found and delete */
+ ulist_rbtree_erase(ulist, node);
+ return 0;
+}
+
/**
* ulist_next - iterate ulist
* @ulist: ulist to iterate
@@ -237,15 +270,7 @@ struct ulist_node *ulist_next(struct ulist *ulist, struct ulist_iterator *uiter)
uiter->cur_list = uiter->cur_list->next;
} else {
uiter->cur_list = ulist->nodes.next;
-#ifdef CONFIG_BTRFS_DEBUG
- uiter->i = 0;
-#endif
}
node = list_entry(uiter->cur_list, struct ulist_node, list);
-#ifdef CONFIG_BTRFS_DEBUG
- ASSERT(node->seqnum == uiter->i);
- ASSERT(uiter->i >= 0 && uiter->i < ulist->nnodes);
- uiter->i++;
-#endif
return node;
}
diff --git a/kernel/fs/btrfs/ulist.h b/kernel/fs/btrfs/ulist.h
index 4c29db604..a01a2c458 100644
--- a/kernel/fs/btrfs/ulist.h
+++ b/kernel/fs/btrfs/ulist.h
@@ -57,6 +57,7 @@ void ulist_free(struct ulist *ulist);
int ulist_add(struct ulist *ulist, u64 val, u64 aux, gfp_t gfp_mask);
int ulist_add_merge(struct ulist *ulist, u64 val, u64 aux,
u64 *old_aux, gfp_t gfp_mask);
+int ulist_del(struct ulist *ulist, u64 val, u64 aux);
/* just like ulist_add_merge() but take a pointer for the aux data */
static inline int ulist_add_merge_ptr(struct ulist *ulist, u64 val, void *aux,
diff --git a/kernel/fs/btrfs/volumes.c b/kernel/fs/btrfs/volumes.c
index 174f5e1e0..9c62a6f97 100644
--- a/kernel/fs/btrfs/volumes.c
+++ b/kernel/fs/btrfs/volumes.c
@@ -42,6 +42,82 @@
#include "dev-replace.h"
#include "sysfs.h"
+const struct btrfs_raid_attr btrfs_raid_array[BTRFS_NR_RAID_TYPES] = {
+ [BTRFS_RAID_RAID10] = {
+ .sub_stripes = 2,
+ .dev_stripes = 1,
+ .devs_max = 0, /* 0 == as many as possible */
+ .devs_min = 4,
+ .tolerated_failures = 1,
+ .devs_increment = 2,
+ .ncopies = 2,
+ },
+ [BTRFS_RAID_RAID1] = {
+ .sub_stripes = 1,
+ .dev_stripes = 1,
+ .devs_max = 2,
+ .devs_min = 2,
+ .tolerated_failures = 1,
+ .devs_increment = 2,
+ .ncopies = 2,
+ },
+ [BTRFS_RAID_DUP] = {
+ .sub_stripes = 1,
+ .dev_stripes = 2,
+ .devs_max = 1,
+ .devs_min = 1,
+ .tolerated_failures = 0,
+ .devs_increment = 1,
+ .ncopies = 2,
+ },
+ [BTRFS_RAID_RAID0] = {
+ .sub_stripes = 1,
+ .dev_stripes = 1,
+ .devs_max = 0,
+ .devs_min = 2,
+ .tolerated_failures = 0,
+ .devs_increment = 1,
+ .ncopies = 1,
+ },
+ [BTRFS_RAID_SINGLE] = {
+ .sub_stripes = 1,
+ .dev_stripes = 1,
+ .devs_max = 1,
+ .devs_min = 1,
+ .tolerated_failures = 0,
+ .devs_increment = 1,
+ .ncopies = 1,
+ },
+ [BTRFS_RAID_RAID5] = {
+ .sub_stripes = 1,
+ .dev_stripes = 1,
+ .devs_max = 0,
+ .devs_min = 2,
+ .tolerated_failures = 1,
+ .devs_increment = 1,
+ .ncopies = 2,
+ },
+ [BTRFS_RAID_RAID6] = {
+ .sub_stripes = 1,
+ .dev_stripes = 1,
+ .devs_max = 0,
+ .devs_min = 3,
+ .tolerated_failures = 2,
+ .devs_increment = 1,
+ .ncopies = 3,
+ },
+};
+
+const u64 const btrfs_raid_group[BTRFS_NR_RAID_TYPES] = {
+ [BTRFS_RAID_RAID10] = BTRFS_BLOCK_GROUP_RAID10,
+ [BTRFS_RAID_RAID1] = BTRFS_BLOCK_GROUP_RAID1,
+ [BTRFS_RAID_DUP] = BTRFS_BLOCK_GROUP_DUP,
+ [BTRFS_RAID_RAID0] = BTRFS_BLOCK_GROUP_RAID0,
+ [BTRFS_RAID_SINGLE] = 0,
+ [BTRFS_RAID_RAID5] = BTRFS_BLOCK_GROUP_RAID5,
+ [BTRFS_RAID_RAID6] = BTRFS_BLOCK_GROUP_RAID6,
+};
+
static int init_first_rw_device(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct btrfs_device *device);
@@ -52,6 +128,10 @@ static void btrfs_dev_stat_print_on_load(struct btrfs_device *device);
DEFINE_MUTEX(uuid_mutex);
static LIST_HEAD(fs_uuids);
+struct list_head *btrfs_get_fs_uuids(void)
+{
+ return &fs_uuids;
+}
static struct btrfs_fs_devices *__alloc_fs_devices(void)
{
@@ -152,8 +232,9 @@ static struct btrfs_device *__alloc_device(void)
spin_lock_init(&dev->reada_lock);
atomic_set(&dev->reada_in_flight, 0);
atomic_set(&dev->dev_stats_ccnt, 0);
- INIT_RADIX_TREE(&dev->reada_zones, GFP_NOFS & ~__GFP_WAIT);
- INIT_RADIX_TREE(&dev->reada_extents, GFP_NOFS & ~__GFP_WAIT);
+ btrfs_device_data_ordered_init(dev);
+ INIT_RADIX_TREE(&dev->reada_zones, GFP_NOFS & ~__GFP_DIRECT_RECLAIM);
+ INIT_RADIX_TREE(&dev->reada_extents, GFP_NOFS & ~__GFP_DIRECT_RECLAIM);
return dev;
}
@@ -194,7 +275,6 @@ btrfs_get_bdev_and_sb(const char *device_path, fmode_t flags, void *holder,
if (IS_ERR(*bdev)) {
ret = PTR_ERR(*bdev);
- printk(KERN_INFO "BTRFS: open %s failed\n", device_path);
goto error;
}
@@ -207,8 +287,8 @@ btrfs_get_bdev_and_sb(const char *device_path, fmode_t flags, void *holder,
}
invalidate_bdev(*bdev);
*bh = btrfs_read_dev_super(*bdev);
- if (!*bh) {
- ret = -EINVAL;
+ if (IS_ERR(*bh)) {
+ ret = PTR_ERR(*bh);
blkdev_put(*bdev, flags);
goto error;
}
@@ -341,11 +421,14 @@ loop_lock:
pending = pending->bi_next;
cur->bi_next = NULL;
+ /*
+ * atomic_dec_return implies a barrier for waitqueue_active
+ */
if (atomic_dec_return(&fs_info->nr_async_bios) < limit &&
waitqueue_active(&fs_info->async_submit_wait))
wake_up(&fs_info->async_submit_wait);
- BUG_ON(atomic_read(&cur->bi_cnt) == 0);
+ BUG_ON(atomic_read(&cur->__bi_cnt) == 0);
/*
* if we're doing the sync list, record that our
@@ -441,6 +524,61 @@ static void pending_bios_fn(struct btrfs_work *work)
run_scheduled_bios(device);
}
+
+void btrfs_free_stale_device(struct btrfs_device *cur_dev)
+{
+ struct btrfs_fs_devices *fs_devs;
+ struct btrfs_device *dev;
+
+ if (!cur_dev->name)
+ return;
+
+ list_for_each_entry(fs_devs, &fs_uuids, list) {
+ int del = 1;
+
+ if (fs_devs->opened)
+ continue;
+ if (fs_devs->seeding)
+ continue;
+
+ list_for_each_entry(dev, &fs_devs->devices, dev_list) {
+
+ if (dev == cur_dev)
+ continue;
+ if (!dev->name)
+ continue;
+
+ /*
+ * Todo: This won't be enough. What if the same device
+ * comes back (with new uuid and) with its mapper path?
+ * But for now, this does help as mostly an admin will
+ * either use mapper or non mapper path throughout.
+ */
+ rcu_read_lock();
+ del = strcmp(rcu_str_deref(dev->name),
+ rcu_str_deref(cur_dev->name));
+ rcu_read_unlock();
+ if (!del)
+ break;
+ }
+
+ if (!del) {
+ /* delete the stale device */
+ if (fs_devs->num_devices == 1) {
+ btrfs_sysfs_remove_fsid(fs_devs);
+ list_del(&fs_devs->list);
+ free_fs_devices(fs_devs);
+ } else {
+ fs_devs->num_devices--;
+ list_del(&dev->dev_list);
+ rcu_string_free(dev->name);
+ kfree(dev);
+ }
+ break;
+ }
+ }
+}
+
/*
* Add new device to list of registered devices
*
@@ -556,6 +694,12 @@ static noinline int device_list_add(const char *path,
if (!fs_devices->opened)
device->generation = found_transid;
+ /*
+ * if there is new btrfs on an already registered device,
+ * then remove the stale device entry.
+ */
+ btrfs_free_stale_device(device);
+
*fs_devices_ret = fs_devices;
return ret;
@@ -693,43 +837,14 @@ static void free_device(struct rcu_head *head)
static int __btrfs_close_devices(struct btrfs_fs_devices *fs_devices)
{
- struct btrfs_device *device;
+ struct btrfs_device *device, *tmp;
if (--fs_devices->opened > 0)
return 0;
mutex_lock(&fs_devices->device_list_mutex);
- list_for_each_entry(device, &fs_devices->devices, dev_list) {
- struct btrfs_device *new_device;
- struct rcu_string *name;
-
- if (device->bdev)
- fs_devices->open_devices--;
-
- if (device->writeable &&
- device->devid != BTRFS_DEV_REPLACE_DEVID) {
- list_del_init(&device->dev_alloc_list);
- fs_devices->rw_devices--;
- }
-
- if (device->missing)
- fs_devices->missing_devices--;
-
- new_device = btrfs_alloc_device(NULL, &device->devid,
- device->uuid);
- BUG_ON(IS_ERR(new_device)); /* -ENOMEM */
-
- /* Safe because we are under uuid_mutex */
- if (device->name) {
- name = rcu_string_strdup(device->name->str, GFP_NOFS);
- BUG_ON(!name); /* -ENOMEM */
- rcu_assign_pointer(new_device->name, name);
- }
-
- list_replace_rcu(&device->dev_list, &new_device->dev_list);
- new_device->fs_devices = device->fs_devices;
-
- call_rcu(&device->rcu, free_device);
+ list_for_each_entry_safe(device, tmp, &fs_devices->devices, dev_list) {
+ btrfs_close_one_device(device);
}
mutex_unlock(&fs_devices->device_list_mutex);
@@ -1051,15 +1166,18 @@ out:
return ret;
}
-static int contains_pending_extent(struct btrfs_trans_handle *trans,
+static int contains_pending_extent(struct btrfs_transaction *transaction,
struct btrfs_device *device,
u64 *start, u64 len)
{
+ struct btrfs_fs_info *fs_info = device->dev_root->fs_info;
struct extent_map *em;
- struct list_head *search_list = &trans->transaction->pending_chunks;
+ struct list_head *search_list = &fs_info->pinned_chunks;
int ret = 0;
u64 physical_start = *start;
+ if (transaction)
+ search_list = &transaction->pending_chunks;
again:
list_for_each_entry(em, search_list, list) {
struct map_lookup *map;
@@ -1067,19 +1185,35 @@ again:
map = (struct map_lookup *)em->bdev;
for (i = 0; i < map->num_stripes; i++) {
+ u64 end;
+
if (map->stripes[i].dev != device)
continue;
if (map->stripes[i].physical >= physical_start + len ||
map->stripes[i].physical + em->orig_block_len <=
physical_start)
continue;
- *start = map->stripes[i].physical +
- em->orig_block_len;
- ret = 1;
+ /*
+ * Make sure that while processing the pinned list we do
+ * not override our *start with a lower value, because
+ * we can have pinned chunks that fall within this
+ * device hole and that have lower physical addresses
+ * than the pending chunks we processed before. If we
+ * do not take this special care we can end up getting
+ * 2 pending chunks that start at the same physical
+ * device offsets because the end offset of a pinned
+ * chunk can be equal to the start offset of some
+ * pending chunk.
+ */
+ end = map->stripes[i].physical + em->orig_block_len;
+ if (end > *start) {
+ *start = end;
+ ret = 1;
+ }
}
}
- if (search_list == &trans->transaction->pending_chunks) {
- search_list = &trans->root->fs_info->pinned_chunks;
+ if (search_list != &fs_info->pinned_chunks) {
+ search_list = &fs_info->pinned_chunks;
goto again;
}
@@ -1088,12 +1222,13 @@ again:
/*
- * find_free_dev_extent - find free space in the specified device
- * @device: the device which we search the free space in
- * @num_bytes: the size of the free space that we need
- * @start: store the start of the free space.
- * @len: the size of the free space. that we find, or the size of the max
- * free space if we don't find suitable free space
+ * find_free_dev_extent_start - find free space in the specified device
+ * @device: the device which we search the free space in
+ * @num_bytes: the size of the free space that we need
+ * @search_start: the position from which to begin the search
+ * @start: store the start of the free space.
+ * @len: the size of the free space. that we find, or the size
+ * of the max free space if we don't find suitable free space
*
* this uses a pretty simple search, the expectation is that it is
* called very infrequently and that a given device has a small number
@@ -1107,9 +1242,9 @@ again:
* But if we don't find suitable free space, it is used to store the size of
* the max free space.
*/
-int find_free_dev_extent(struct btrfs_trans_handle *trans,
- struct btrfs_device *device, u64 num_bytes,
- u64 *start, u64 *len)
+int find_free_dev_extent_start(struct btrfs_transaction *transaction,
+ struct btrfs_device *device, u64 num_bytes,
+ u64 search_start, u64 *start, u64 *len)
{
struct btrfs_key key;
struct btrfs_root *root = device->dev_root;
@@ -1119,18 +1254,19 @@ int find_free_dev_extent(struct btrfs_trans_handle *trans,
u64 max_hole_start;
u64 max_hole_size;
u64 extent_end;
- u64 search_start;
u64 search_end = device->total_bytes;
int ret;
int slot;
struct extent_buffer *l;
+ u64 min_search_start;
- /* FIXME use last free of some kind */
-
- /* we don't want to overwrite the superblock on the drive,
- * so we make sure to start at an offset of at least 1MB
+ /*
+ * We don't want to overwrite the superblock on the drive nor any area
+ * used by the boot loader (grub for example), so we make sure to start
+ * at an offset of at least 1MB.
*/
- search_start = max(root->fs_info->alloc_start, 1024ull * 1024);
+ min_search_start = max(root->fs_info->alloc_start, 1024ull * 1024);
+ search_start = max(search_start, min_search_start);
path = btrfs_alloc_path();
if (!path)
@@ -1192,7 +1328,7 @@ again:
* Have to check before we set max_hole_start, otherwise
* we could end up sending back this offset anyway.
*/
- if (contains_pending_extent(trans, device,
+ if (contains_pending_extent(transaction, device,
&search_start,
hole_size)) {
if (key.offset >= search_start) {
@@ -1241,7 +1377,7 @@ next:
if (search_end > search_start) {
hole_size = search_end - search_start;
- if (contains_pending_extent(trans, device, &search_start,
+ if (contains_pending_extent(transaction, device, &search_start,
hole_size)) {
btrfs_release_path(path);
goto again;
@@ -1267,6 +1403,15 @@ out:
return ret;
}
+int find_free_dev_extent(struct btrfs_trans_handle *trans,
+ struct btrfs_device *device, u64 num_bytes,
+ u64 *start, u64 *len)
+{
+ /* FIXME use last free of some kind */
+ return find_free_dev_extent_start(trans->transaction, device,
+ num_bytes, 0, start, len);
+}
+
static int btrfs_free_dev_extent(struct btrfs_trans_handle *trans,
struct btrfs_device *device,
u64 start, u64 *dev_extent_len)
@@ -1307,7 +1452,7 @@ again:
extent = btrfs_item_ptr(leaf, path->slots[0],
struct btrfs_dev_extent);
} else {
- btrfs_error(root->fs_info, ret, "Slot search failed");
+ btrfs_std_error(root->fs_info, ret, "Slot search failed");
goto out;
}
@@ -1315,10 +1460,10 @@ again:
ret = btrfs_del_item(trans, root, path);
if (ret) {
- btrfs_error(root->fs_info, ret,
+ btrfs_std_error(root->fs_info, ret,
"Failed to remove dev extent item");
} else {
- trans->transaction->have_free_bgs = 1;
+ set_bit(BTRFS_TRANS_HAVE_FREE_BGS, &trans->transaction->flags);
}
out:
btrfs_free_path(path);
@@ -1706,7 +1851,7 @@ int btrfs_rm_device(struct btrfs_root *root, char *device_path)
if (device->bdev) {
device->fs_devices->open_devices--;
/* remove sysfs entry */
- btrfs_kobj_rm_device(root->fs_info, device);
+ btrfs_sysfs_rm_device_link(root->fs_info->fs_devices, device);
}
call_rcu(&device->rcu, free_device);
@@ -1829,7 +1974,7 @@ void btrfs_rm_dev_replace_remove_srcdev(struct btrfs_fs_info *fs_info,
if (srcdev->writeable) {
fs_devices->rw_devices--;
/* zero out the old super if it is writable */
- btrfs_scratch_superblock(srcdev);
+ btrfs_scratch_superblocks(srcdev->bdev, srcdev->name->str);
}
if (srcdev->bdev)
@@ -1875,8 +2020,11 @@ void btrfs_destroy_dev_replace_tgtdev(struct btrfs_fs_info *fs_info,
mutex_lock(&uuid_mutex);
WARN_ON(!tgtdev);
mutex_lock(&fs_info->fs_devices->device_list_mutex);
+
+ btrfs_sysfs_rm_device_link(fs_info->fs_devices, tgtdev);
+
if (tgtdev->bdev) {
- btrfs_scratch_superblock(tgtdev);
+ btrfs_scratch_superblocks(tgtdev->bdev, tgtdev->name->str);
fs_info->fs_devices->open_devices--;
}
fs_info->fs_devices->num_devices--;
@@ -1943,10 +2091,8 @@ int btrfs_find_device_missing_or_by_path(struct btrfs_root *root,
}
}
- if (!*device) {
- btrfs_err(root->fs_info, "no missing device found");
- return -ENOENT;
- }
+ if (!*device)
+ return BTRFS_ERROR_DEV_MISSING_NOT_FOUND;
return 0;
} else {
@@ -2211,7 +2357,7 @@ int btrfs_init_new_device(struct btrfs_root *root, char *device_path)
tmp + 1);
/* add sysfs device entry */
- btrfs_kobj_add_device(root->fs_info, device);
+ btrfs_sysfs_add_device_link(root->fs_info->fs_devices, device);
/*
* we've got more storage, clear any full flags on the space
@@ -2252,8 +2398,10 @@ int btrfs_init_new_device(struct btrfs_root *root, char *device_path)
*/
snprintf(fsid_buf, BTRFS_UUID_UNPARSED_SIZE, "%pU",
root->fs_info->fsid);
- if (kobject_rename(&root->fs_info->super_kobj, fsid_buf))
- goto error_trans;
+ if (kobject_rename(&root->fs_info->fs_devices->fsid_kobj,
+ fsid_buf))
+ btrfs_warn(root->fs_info,
+ "sysfs: failed to create fsid for sprout");
}
root->fs_info->num_tolerated_disk_barrier_failures =
@@ -2269,7 +2417,7 @@ int btrfs_init_new_device(struct btrfs_root *root, char *device_path)
ret = btrfs_relocate_sys_chunks(root);
if (ret < 0)
- btrfs_error(root->fs_info, ret,
+ btrfs_std_error(root->fs_info, ret,
"Failed to relocate sys chunks after "
"device initialization. This can be fixed "
"using the \"btrfs balance\" command.");
@@ -2289,7 +2437,7 @@ int btrfs_init_new_device(struct btrfs_root *root, char *device_path)
error_trans:
btrfs_end_transaction(trans, root);
rcu_string_free(device->name);
- btrfs_kobj_rm_device(root->fs_info, device);
+ btrfs_sysfs_rm_device_link(root->fs_info->fs_devices, device);
kfree(device);
error:
blkdev_put(bdev, FMODE_EXCL);
@@ -2514,7 +2662,7 @@ static int btrfs_free_chunk(struct btrfs_trans_handle *trans,
if (ret < 0)
goto out;
else if (ret > 0) { /* Logic error or corruption */
- btrfs_error(root->fs_info, -ENOENT,
+ btrfs_std_error(root->fs_info, -ENOENT,
"Failed lookup while freeing chunk.");
ret = -ENOENT;
goto out;
@@ -2522,7 +2670,7 @@ static int btrfs_free_chunk(struct btrfs_trans_handle *trans,
ret = btrfs_del_item(trans, root, path);
if (ret < 0)
- btrfs_error(root->fs_info, ret,
+ btrfs_std_error(root->fs_info, ret,
"Failed to delete chunk item.");
out:
btrfs_free_path(path);
@@ -2609,6 +2757,9 @@ int btrfs_remove_chunk(struct btrfs_trans_handle *trans,
return -EINVAL;
}
map = (struct map_lookup *)em->bdev;
+ lock_chunks(root->fs_info->chunk_root);
+ check_system_chunk(trans, extent_root, map->type);
+ unlock_chunks(root->fs_info->chunk_root);
for (i = 0; i < map->num_stripes; i++) {
struct btrfs_device *device = map->stripes[i].dev;
@@ -2667,9 +2818,7 @@ out:
return ret;
}
-static int btrfs_relocate_chunk(struct btrfs_root *root,
- u64 chunk_objectid,
- u64 chunk_offset)
+static int btrfs_relocate_chunk(struct btrfs_root *root, u64 chunk_offset)
{
struct btrfs_root *extent_root;
struct btrfs_trans_handle *trans;
@@ -2678,19 +2827,36 @@ static int btrfs_relocate_chunk(struct btrfs_root *root,
root = root->fs_info->chunk_root;
extent_root = root->fs_info->extent_root;
+ /*
+ * Prevent races with automatic removal of unused block groups.
+ * After we relocate and before we remove the chunk with offset
+ * chunk_offset, automatic removal of the block group can kick in,
+ * resulting in a failure when calling btrfs_remove_chunk() below.
+ *
+ * Make sure to acquire this mutex before doing a tree search (dev
+ * or chunk trees) to find chunks. Otherwise the cleaner kthread might
+ * call btrfs_remove_chunk() (through btrfs_delete_unused_bgs()) after
+ * we release the path used to search the chunk/dev tree and before
+ * the current task acquires this mutex and calls us.
+ */
+ ASSERT(mutex_is_locked(&root->fs_info->delete_unused_bgs_mutex));
+
ret = btrfs_can_relocate(extent_root, chunk_offset);
if (ret)
return -ENOSPC;
/* step one, relocate all the extents inside this chunk */
+ btrfs_scrub_pause(root);
ret = btrfs_relocate_block_group(extent_root, chunk_offset);
+ btrfs_scrub_continue(root);
if (ret)
return ret;
- trans = btrfs_start_transaction(root, 0);
+ trans = btrfs_start_trans_remove_block_group(root->fs_info,
+ chunk_offset);
if (IS_ERR(trans)) {
ret = PTR_ERR(trans);
- btrfs_std_error(root->fs_info, ret);
+ btrfs_std_error(root->fs_info, ret, NULL);
return ret;
}
@@ -2726,13 +2892,18 @@ again:
key.type = BTRFS_CHUNK_ITEM_KEY;
while (1) {
+ mutex_lock(&root->fs_info->delete_unused_bgs_mutex);
ret = btrfs_search_slot(NULL, chunk_root, &key, path, 0, 0);
- if (ret < 0)
+ if (ret < 0) {
+ mutex_unlock(&root->fs_info->delete_unused_bgs_mutex);
goto error;
+ }
BUG_ON(ret == 0); /* Corruption */
ret = btrfs_previous_item(chunk_root, path, key.objectid,
key.type);
+ if (ret)
+ mutex_unlock(&root->fs_info->delete_unused_bgs_mutex);
if (ret < 0)
goto error;
if (ret > 0)
@@ -2748,13 +2919,13 @@ again:
if (chunk_type & BTRFS_BLOCK_GROUP_SYSTEM) {
ret = btrfs_relocate_chunk(chunk_root,
- found_key.objectid,
found_key.offset);
if (ret == -ENOSPC)
failed++;
else
BUG_ON(ret);
}
+ mutex_unlock(&root->fs_info->delete_unused_bgs_mutex);
if (found_key.offset == 0)
break;
@@ -2888,16 +3059,19 @@ static void update_balance_args(struct btrfs_balance_control *bctl)
* (albeit full) chunks.
*/
if (!(bctl->data.flags & BTRFS_BALANCE_ARGS_USAGE) &&
+ !(bctl->data.flags & BTRFS_BALANCE_ARGS_USAGE_RANGE) &&
!(bctl->data.flags & BTRFS_BALANCE_ARGS_CONVERT)) {
bctl->data.flags |= BTRFS_BALANCE_ARGS_USAGE;
bctl->data.usage = 90;
}
if (!(bctl->sys.flags & BTRFS_BALANCE_ARGS_USAGE) &&
+ !(bctl->sys.flags & BTRFS_BALANCE_ARGS_USAGE_RANGE) &&
!(bctl->sys.flags & BTRFS_BALANCE_ARGS_CONVERT)) {
bctl->sys.flags |= BTRFS_BALANCE_ARGS_USAGE;
bctl->sys.usage = 90;
}
if (!(bctl->meta.flags & BTRFS_BALANCE_ARGS_USAGE) &&
+ !(bctl->meta.flags & BTRFS_BALANCE_ARGS_USAGE_RANGE) &&
!(bctl->meta.flags & BTRFS_BALANCE_ARGS_CONVERT)) {
bctl->meta.flags |= BTRFS_BALANCE_ARGS_USAGE;
bctl->meta.usage = 90;
@@ -2949,17 +3123,50 @@ static int chunk_profiles_filter(u64 chunk_type,
return 1;
}
-static int chunk_usage_filter(struct btrfs_fs_info *fs_info, u64 chunk_offset,
+static int chunk_usage_range_filter(struct btrfs_fs_info *fs_info, u64 chunk_offset,
struct btrfs_balance_args *bargs)
{
struct btrfs_block_group_cache *cache;
+ u64 chunk_used;
+ u64 user_thresh_min;
+ u64 user_thresh_max;
+ int ret = 1;
+
+ cache = btrfs_lookup_block_group(fs_info, chunk_offset);
+ chunk_used = btrfs_block_group_used(&cache->item);
+
+ if (bargs->usage_min == 0)
+ user_thresh_min = 0;
+ else
+ user_thresh_min = div_factor_fine(cache->key.offset,
+ bargs->usage_min);
+
+ if (bargs->usage_max == 0)
+ user_thresh_max = 1;
+ else if (bargs->usage_max > 100)
+ user_thresh_max = cache->key.offset;
+ else
+ user_thresh_max = div_factor_fine(cache->key.offset,
+ bargs->usage_max);
+
+ if (user_thresh_min <= chunk_used && chunk_used < user_thresh_max)
+ ret = 0;
+
+ btrfs_put_block_group(cache);
+ return ret;
+}
+
+static int chunk_usage_filter(struct btrfs_fs_info *fs_info,
+ u64 chunk_offset, struct btrfs_balance_args *bargs)
+{
+ struct btrfs_block_group_cache *cache;
u64 chunk_used, user_thresh;
int ret = 1;
cache = btrfs_lookup_block_group(fs_info, chunk_offset);
chunk_used = btrfs_block_group_used(&cache->item);
- if (bargs->usage == 0)
+ if (bargs->usage_min == 0)
user_thresh = 1;
else if (bargs->usage > 100)
user_thresh = cache->key.offset;
@@ -3049,6 +3256,19 @@ static int chunk_vrange_filter(struct extent_buffer *leaf,
return 1;
}
+static int chunk_stripes_range_filter(struct extent_buffer *leaf,
+ struct btrfs_chunk *chunk,
+ struct btrfs_balance_args *bargs)
+{
+ int num_stripes = btrfs_chunk_num_stripes(leaf, chunk);
+
+ if (bargs->stripes_min <= num_stripes
+ && num_stripes <= bargs->stripes_max)
+ return 0;
+
+ return 1;
+}
+
static int chunk_soft_convert_filter(u64 chunk_type,
struct btrfs_balance_args *bargs)
{
@@ -3095,6 +3315,9 @@ static int should_balance_chunk(struct btrfs_root *root,
if ((bargs->flags & BTRFS_BALANCE_ARGS_USAGE) &&
chunk_usage_filter(bctl->fs_info, chunk_offset, bargs)) {
return 0;
+ } else if ((bargs->flags & BTRFS_BALANCE_ARGS_USAGE_RANGE) &&
+ chunk_usage_range_filter(bctl->fs_info, chunk_offset, bargs)) {
+ return 0;
}
/* devid filter */
@@ -3115,6 +3338,12 @@ static int should_balance_chunk(struct btrfs_root *root,
return 0;
}
+ /* stripes filter */
+ if ((bargs->flags & BTRFS_BALANCE_ARGS_STRIPES_RANGE) &&
+ chunk_stripes_range_filter(leaf, chunk, bargs)) {
+ return 0;
+ }
+
/* soft profile changing mode */
if ((bargs->flags & BTRFS_BALANCE_ARGS_SOFT) &&
chunk_soft_convert_filter(chunk_type, bargs)) {
@@ -3129,6 +3358,16 @@ static int should_balance_chunk(struct btrfs_root *root,
return 0;
else
bargs->limit--;
+ } else if ((bargs->flags & BTRFS_BALANCE_ARGS_LIMIT_RANGE)) {
+ /*
+ * Same logic as the 'limit' filter; the minimum cannot be
+ * determined here because we do not have the global informatoin
+ * about the count of all chunks that satisfy the filters.
+ */
+ if (bargs->limit_max == 0)
+ return 0;
+ else
+ bargs->limit_max--;
}
return 1;
@@ -3143,6 +3382,7 @@ static int __btrfs_balance(struct btrfs_fs_info *fs_info)
struct btrfs_device *device;
u64 old_size;
u64 size_to_free;
+ u64 chunk_type;
struct btrfs_chunk *chunk;
struct btrfs_path *path;
struct btrfs_key key;
@@ -3153,9 +3393,14 @@ static int __btrfs_balance(struct btrfs_fs_info *fs_info)
int ret;
int enospc_errors = 0;
bool counting = true;
+ /* The single value limit and min/max limits use the same bytes in the */
u64 limit_data = bctl->data.limit;
u64 limit_meta = bctl->meta.limit;
u64 limit_sys = bctl->sys.limit;
+ u32 count_data = 0;
+ u32 count_meta = 0;
+ u32 count_sys = 0;
+ int chunk_reserved = 0;
/* step one make some room on all the devices */
devices = &fs_info->fs_devices->devices;
@@ -3196,6 +3441,10 @@ static int __btrfs_balance(struct btrfs_fs_info *fs_info)
spin_unlock(&fs_info->balance_lock);
again:
if (!counting) {
+ /*
+ * The single value limit and min/max limits use the same bytes
+ * in the
+ */
bctl->data.limit = limit_data;
bctl->meta.limit = limit_meta;
bctl->sys.limit = limit_sys;
@@ -3211,9 +3460,12 @@ again:
goto error;
}
+ mutex_lock(&fs_info->delete_unused_bgs_mutex);
ret = btrfs_search_slot(NULL, chunk_root, &key, path, 0, 0);
- if (ret < 0)
+ if (ret < 0) {
+ mutex_unlock(&fs_info->delete_unused_bgs_mutex);
goto error;
+ }
/*
* this shouldn't happen, it means the last relocate
@@ -3225,6 +3477,7 @@ again:
ret = btrfs_previous_item(chunk_root, path, 0,
BTRFS_CHUNK_ITEM_KEY);
if (ret) {
+ mutex_unlock(&fs_info->delete_unused_bgs_mutex);
ret = 0;
break;
}
@@ -3233,10 +3486,13 @@ again:
slot = path->slots[0];
btrfs_item_key_to_cpu(leaf, &found_key, slot);
- if (found_key.objectid != key.objectid)
+ if (found_key.objectid != key.objectid) {
+ mutex_unlock(&fs_info->delete_unused_bgs_mutex);
break;
+ }
chunk = btrfs_item_ptr(leaf, slot, struct btrfs_chunk);
+ chunk_type = btrfs_chunk_type(leaf, chunk);
if (!counting) {
spin_lock(&fs_info->balance_lock);
@@ -3246,20 +3502,64 @@ again:
ret = should_balance_chunk(chunk_root, leaf, chunk,
found_key.offset);
+
btrfs_release_path(path);
- if (!ret)
+ if (!ret) {
+ mutex_unlock(&fs_info->delete_unused_bgs_mutex);
goto loop;
+ }
if (counting) {
+ mutex_unlock(&fs_info->delete_unused_bgs_mutex);
spin_lock(&fs_info->balance_lock);
bctl->stat.expected++;
spin_unlock(&fs_info->balance_lock);
+
+ if (chunk_type & BTRFS_BLOCK_GROUP_DATA)
+ count_data++;
+ else if (chunk_type & BTRFS_BLOCK_GROUP_SYSTEM)
+ count_sys++;
+ else if (chunk_type & BTRFS_BLOCK_GROUP_METADATA)
+ count_meta++;
+
+ goto loop;
+ }
+
+ /*
+ * Apply limit_min filter, no need to check if the LIMITS
+ * filter is used, limit_min is 0 by default
+ */
+ if (((chunk_type & BTRFS_BLOCK_GROUP_DATA) &&
+ count_data < bctl->data.limit_min)
+ || ((chunk_type & BTRFS_BLOCK_GROUP_METADATA) &&
+ count_meta < bctl->meta.limit_min)
+ || ((chunk_type & BTRFS_BLOCK_GROUP_SYSTEM) &&
+ count_sys < bctl->sys.limit_min)) {
+ mutex_unlock(&fs_info->delete_unused_bgs_mutex);
goto loop;
}
+ if ((chunk_type & BTRFS_BLOCK_GROUP_DATA) && !chunk_reserved) {
+ trans = btrfs_start_transaction(chunk_root, 0);
+ if (IS_ERR(trans)) {
+ mutex_unlock(&fs_info->delete_unused_bgs_mutex);
+ ret = PTR_ERR(trans);
+ goto error;
+ }
+
+ ret = btrfs_force_chunk_alloc(trans, chunk_root,
+ BTRFS_BLOCK_GROUP_DATA);
+ btrfs_end_transaction(trans, chunk_root);
+ if (ret < 0) {
+ mutex_unlock(&fs_info->delete_unused_bgs_mutex);
+ goto error;
+ }
+ chunk_reserved = 1;
+ }
+
ret = btrfs_relocate_chunk(chunk_root,
- found_key.objectid,
found_key.offset);
+ mutex_unlock(&fs_info->delete_unused_bgs_mutex);
if (ret && ret != -ENOSPC)
goto error;
if (ret == -ENOSPC) {
@@ -3331,11 +3631,20 @@ static void __cancel_balance(struct btrfs_fs_info *fs_info)
unset_balance_control(fs_info);
ret = del_balance_item(fs_info->tree_root);
if (ret)
- btrfs_std_error(fs_info, ret);
+ btrfs_std_error(fs_info, ret, NULL);
atomic_set(&fs_info->mutually_exclusive_operation_running, 0);
}
+/* Non-zero return value signifies invalidity */
+static inline int validate_convert_profile(struct btrfs_balance_args *bctl_arg,
+ u64 allowed)
+{
+ return ((bctl_arg->flags & BTRFS_BALANCE_ARGS_CONVERT) &&
+ (!alloc_profile_is_valid(bctl_arg->target, 1) ||
+ (bctl_arg->target & ~allowed)));
+}
+
/*
* Should be called with both balance and volume mutexes held
*/
@@ -3393,27 +3702,21 @@ int btrfs_balance(struct btrfs_balance_control *bctl,
if (num_devices > 3)
allowed |= (BTRFS_BLOCK_GROUP_RAID10 |
BTRFS_BLOCK_GROUP_RAID6);
- if ((bctl->data.flags & BTRFS_BALANCE_ARGS_CONVERT) &&
- (!alloc_profile_is_valid(bctl->data.target, 1) ||
- (bctl->data.target & ~allowed))) {
+ if (validate_convert_profile(&bctl->data, allowed)) {
btrfs_err(fs_info, "unable to start balance with target "
"data profile %llu",
bctl->data.target);
ret = -EINVAL;
goto out;
}
- if ((bctl->meta.flags & BTRFS_BALANCE_ARGS_CONVERT) &&
- (!alloc_profile_is_valid(bctl->meta.target, 1) ||
- (bctl->meta.target & ~allowed))) {
+ if (validate_convert_profile(&bctl->meta, allowed)) {
btrfs_err(fs_info,
"unable to start balance with target metadata profile %llu",
bctl->meta.target);
ret = -EINVAL;
goto out;
}
- if ((bctl->sys.flags & BTRFS_BALANCE_ARGS_CONVERT) &&
- (!alloc_profile_is_valid(bctl->sys.target, 1) ||
- (bctl->sys.target & ~allowed))) {
+ if (validate_convert_profile(&bctl->sys, allowed)) {
btrfs_err(fs_info,
"unable to start balance with target system profile %llu",
bctl->sys.target);
@@ -3455,23 +3758,10 @@ int btrfs_balance(struct btrfs_balance_control *bctl,
} while (read_seqretry(&fs_info->profiles_lock, seq));
if (bctl->sys.flags & BTRFS_BALANCE_ARGS_CONVERT) {
- int num_tolerated_disk_barrier_failures;
- u64 target = bctl->sys.target;
-
- num_tolerated_disk_barrier_failures =
- btrfs_calc_num_tolerated_disk_barrier_failures(fs_info);
- if (num_tolerated_disk_barrier_failures > 0 &&
- (target &
- (BTRFS_BLOCK_GROUP_DUP | BTRFS_BLOCK_GROUP_RAID0 |
- BTRFS_AVAIL_ALLOC_BIT_SINGLE)))
- num_tolerated_disk_barrier_failures = 0;
- else if (num_tolerated_disk_barrier_failures > 1 &&
- (target &
- (BTRFS_BLOCK_GROUP_RAID1 | BTRFS_BLOCK_GROUP_RAID10)))
- num_tolerated_disk_barrier_failures = 1;
-
- fs_info->num_tolerated_disk_barrier_failures =
- num_tolerated_disk_barrier_failures;
+ fs_info->num_tolerated_disk_barrier_failures = min(
+ btrfs_calc_num_tolerated_disk_barrier_failures(fs_info),
+ btrfs_get_num_tolerated_disk_barrier_failures(
+ bctl->sys.target));
}
ret = insert_balance_item(fs_info->tree_root, bctl);
@@ -3908,9 +4198,9 @@ int btrfs_create_uuid_tree(struct btrfs_fs_info *fs_info)
uuid_root = btrfs_create_tree(trans, fs_info,
BTRFS_UUID_TREE_OBJECTID);
if (IS_ERR(uuid_root)) {
- btrfs_abort_transaction(trans, tree_root,
- PTR_ERR(uuid_root));
- return PTR_ERR(uuid_root);
+ ret = PTR_ERR(uuid_root);
+ btrfs_abort_transaction(trans, tree_root, ret);
+ return ret;
}
fs_info->uuid_root = uuid_root;
@@ -3959,12 +4249,12 @@ int btrfs_shrink_device(struct btrfs_device *device, u64 new_size)
struct btrfs_dev_extent *dev_extent = NULL;
struct btrfs_path *path;
u64 length;
- u64 chunk_objectid;
u64 chunk_offset;
int ret;
int slot;
int failed = 0;
bool retried = false;
+ bool checked_pending_chunks = false;
struct extent_buffer *l;
struct btrfs_key key;
struct btrfs_super_block *super_copy = root->fs_info->super_copy;
@@ -3998,11 +4288,16 @@ again:
key.type = BTRFS_DEV_EXTENT_KEY;
do {
+ mutex_lock(&root->fs_info->delete_unused_bgs_mutex);
ret = btrfs_search_slot(NULL, root, &key, path, 0, 0);
- if (ret < 0)
+ if (ret < 0) {
+ mutex_unlock(&root->fs_info->delete_unused_bgs_mutex);
goto done;
+ }
ret = btrfs_previous_item(root, path, 0, key.type);
+ if (ret)
+ mutex_unlock(&root->fs_info->delete_unused_bgs_mutex);
if (ret < 0)
goto done;
if (ret) {
@@ -4016,6 +4311,7 @@ again:
btrfs_item_key_to_cpu(l, &key, path->slots[0]);
if (key.objectid != device->devid) {
+ mutex_unlock(&root->fs_info->delete_unused_bgs_mutex);
btrfs_release_path(path);
break;
}
@@ -4024,15 +4320,16 @@ again:
length = btrfs_dev_extent_length(l, dev_extent);
if (key.offset + length <= new_size) {
+ mutex_unlock(&root->fs_info->delete_unused_bgs_mutex);
btrfs_release_path(path);
break;
}
- chunk_objectid = btrfs_dev_extent_chunk_objectid(l, dev_extent);
chunk_offset = btrfs_dev_extent_chunk_offset(l, dev_extent);
btrfs_release_path(path);
- ret = btrfs_relocate_chunk(root, chunk_objectid, chunk_offset);
+ ret = btrfs_relocate_chunk(root, chunk_offset);
+ mutex_unlock(&root->fs_info->delete_unused_bgs_mutex);
if (ret && ret != -ENOSPC)
goto done;
if (ret == -ENOSPC)
@@ -4045,15 +4342,6 @@ again:
goto again;
} else if (failed && retried) {
ret = -ENOSPC;
- lock_chunks(root);
-
- btrfs_device_set_total_bytes(device, old_size);
- if (device->writeable)
- device->fs_devices->total_rw_bytes += diff;
- spin_lock(&root->fs_info->free_chunk_lock);
- root->fs_info->free_chunk_space += diff;
- spin_unlock(&root->fs_info->free_chunk_lock);
- unlock_chunks(root);
goto done;
}
@@ -4065,6 +4353,36 @@ again:
}
lock_chunks(root);
+
+ /*
+ * We checked in the above loop all device extents that were already in
+ * the device tree. However before we have updated the device's
+ * total_bytes to the new size, we might have had chunk allocations that
+ * have not complete yet (new block groups attached to transaction
+ * handles), and therefore their device extents were not yet in the
+ * device tree and we missed them in the loop above. So if we have any
+ * pending chunk using a device extent that overlaps the device range
+ * that we can not use anymore, commit the current transaction and
+ * repeat the search on the device tree - this way we guarantee we will
+ * not have chunks using device extents that end beyond 'new_size'.
+ */
+ if (!checked_pending_chunks) {
+ u64 start = new_size;
+ u64 len = old_size - new_size;
+
+ if (contains_pending_extent(trans->transaction, device,
+ &start, len)) {
+ unlock_chunks(root);
+ checked_pending_chunks = true;
+ failed = 0;
+ retried = false;
+ ret = btrfs_commit_transaction(trans, root);
+ if (ret)
+ goto done;
+ goto again;
+ }
+ }
+
btrfs_device_set_disk_total_bytes(device, new_size);
if (list_empty(&device->resized_list))
list_add_tail(&device->resized_list,
@@ -4079,6 +4397,16 @@ again:
btrfs_end_transaction(trans, root);
done:
btrfs_free_path(path);
+ if (ret) {
+ lock_chunks(root);
+ btrfs_device_set_total_bytes(device, old_size);
+ if (device->writeable)
+ device->fs_devices->total_rw_bytes += diff;
+ spin_lock(&root->fs_info->free_chunk_lock);
+ root->fs_info->free_chunk_space += diff;
+ spin_unlock(&root->fs_info->free_chunk_lock);
+ unlock_chunks(root);
+ }
return ret;
}
@@ -4130,65 +4458,6 @@ static int btrfs_cmp_device_info(const void *a, const void *b)
return 0;
}
-static const struct btrfs_raid_attr btrfs_raid_array[BTRFS_NR_RAID_TYPES] = {
- [BTRFS_RAID_RAID10] = {
- .sub_stripes = 2,
- .dev_stripes = 1,
- .devs_max = 0, /* 0 == as many as possible */
- .devs_min = 4,
- .devs_increment = 2,
- .ncopies = 2,
- },
- [BTRFS_RAID_RAID1] = {
- .sub_stripes = 1,
- .dev_stripes = 1,
- .devs_max = 2,
- .devs_min = 2,
- .devs_increment = 2,
- .ncopies = 2,
- },
- [BTRFS_RAID_DUP] = {
- .sub_stripes = 1,
- .dev_stripes = 2,
- .devs_max = 1,
- .devs_min = 1,
- .devs_increment = 1,
- .ncopies = 2,
- },
- [BTRFS_RAID_RAID0] = {
- .sub_stripes = 1,
- .dev_stripes = 1,
- .devs_max = 0,
- .devs_min = 2,
- .devs_increment = 1,
- .ncopies = 1,
- },
- [BTRFS_RAID_SINGLE] = {
- .sub_stripes = 1,
- .dev_stripes = 1,
- .devs_max = 1,
- .devs_min = 1,
- .devs_increment = 1,
- .ncopies = 1,
- },
- [BTRFS_RAID_RAID5] = {
- .sub_stripes = 1,
- .dev_stripes = 1,
- .devs_max = 0,
- .devs_min = 2,
- .devs_increment = 1,
- .ncopies = 2,
- },
- [BTRFS_RAID_RAID6] = {
- .sub_stripes = 1,
- .dev_stripes = 1,
- .devs_max = 0,
- .devs_min = 3,
- .devs_increment = 1,
- .ncopies = 3,
- },
-};
-
static u32 find_raid56_stripe_len(u32 data_devices, u32 dev_stripe_target)
{
/* TODO allow them to set a preferred stripe size */
@@ -4914,9 +5183,7 @@ static struct btrfs_bio *alloc_btrfs_bio(int total_stripes, int real_stripes)
* and the stripes
*/
sizeof(u64) * (total_stripes),
- GFP_NOFS);
- if (!bbio)
- return NULL;
+ GFP_NOFS|__GFP_NOFAIL);
atomic_set(&bbio->error, 0);
atomic_set(&bbio->refs, 1);
@@ -5584,26 +5851,26 @@ int btrfs_rmap_block(struct btrfs_mapping_tree *map_tree,
return 0;
}
-static inline void btrfs_end_bbio(struct btrfs_bio *bbio, struct bio *bio, int err)
+static inline void btrfs_end_bbio(struct btrfs_bio *bbio, struct bio *bio)
{
- if (likely(bbio->flags & BTRFS_BIO_ORIG_BIO_SUBMITTED))
- bio_endio_nodec(bio, err);
- else
- bio_endio(bio, err);
+ bio->bi_private = bbio->private;
+ bio->bi_end_io = bbio->end_io;
+ bio_endio(bio);
+
btrfs_put_bbio(bbio);
}
-static void btrfs_end_bio(struct bio *bio, int err)
+static void btrfs_end_bio(struct bio *bio)
{
struct btrfs_bio *bbio = bio->bi_private;
- struct btrfs_device *dev = bbio->stripes[0].dev;
int is_orig_bio = 0;
- if (err) {
+ if (bio->bi_error) {
atomic_inc(&bbio->error);
- if (err == -EIO || err == -EREMOTEIO) {
+ if (bio->bi_error == -EIO || bio->bi_error == -EREMOTEIO) {
unsigned int stripe_index =
btrfs_io_bio(bio)->stripe_index;
+ struct btrfs_device *dev;
BUG_ON(stripe_index >= bbio->num_stripes);
dev = bbio->stripes[stripe_index].dev;
@@ -5633,24 +5900,21 @@ static void btrfs_end_bio(struct bio *bio, int err)
bio = bbio->orig_bio;
}
- bio->bi_private = bbio->private;
- bio->bi_end_io = bbio->end_io;
btrfs_io_bio(bio)->mirror_num = bbio->mirror_num;
/* only send an error to the higher layers if it is
* beyond the tolerance of the btrfs bio
*/
if (atomic_read(&bbio->error) > bbio->max_errors) {
- err = -EIO;
+ bio->bi_error = -EIO;
} else {
/*
* this bio is actually up to date, we didn't
* go over the max number of errors
*/
- set_bit(BIO_UPTODATE, &bio->bi_flags);
- err = 0;
+ bio->bi_error = 0;
}
- btrfs_end_bbio(bbio, bio, err);
+ btrfs_end_bbio(bbio, bio);
} else if (!is_orig_bio) {
bio_put(bio);
}
@@ -5671,7 +5935,7 @@ static noinline void btrfs_schedule_bio(struct btrfs_root *root,
struct btrfs_pending_bios *pending_bios;
if (device->missing || !device->bdev) {
- bio_endio(bio, -EIO);
+ bio_io_error(bio);
return;
}
@@ -5716,34 +5980,6 @@ static noinline void btrfs_schedule_bio(struct btrfs_root *root,
&device->work);
}
-static int bio_size_ok(struct block_device *bdev, struct bio *bio,
- sector_t sector)
-{
- struct bio_vec *prev;
- struct request_queue *q = bdev_get_queue(bdev);
- unsigned int max_sectors = queue_max_sectors(q);
- struct bvec_merge_data bvm = {
- .bi_bdev = bdev,
- .bi_sector = sector,
- .bi_rw = bio->bi_rw,
- };
-
- if (WARN_ON(bio->bi_vcnt == 0))
- return 1;
-
- prev = &bio->bi_io_vec[bio->bi_vcnt - 1];
- if (bio_sectors(bio) > max_sectors)
- return 0;
-
- if (!q->merge_bvec_fn)
- return 1;
-
- bvm.bi_size = bio->bi_iter.bi_size - prev->bv_len;
- if (q->merge_bvec_fn(q, &bvm, prev) < prev->bv_len)
- return 0;
- return 1;
-}
-
static void submit_stripe_bio(struct btrfs_root *root, struct btrfs_bio *bbio,
struct bio *bio, u64 physical, int dev_nr,
int rw, int async)
@@ -5777,38 +6013,6 @@ static void submit_stripe_bio(struct btrfs_root *root, struct btrfs_bio *bbio,
btrfsic_submit_bio(rw, bio);
}
-static int breakup_stripe_bio(struct btrfs_root *root, struct btrfs_bio *bbio,
- struct bio *first_bio, struct btrfs_device *dev,
- int dev_nr, int rw, int async)
-{
- struct bio_vec *bvec = first_bio->bi_io_vec;
- struct bio *bio;
- int nr_vecs = bio_get_nr_vecs(dev->bdev);
- u64 physical = bbio->stripes[dev_nr].physical;
-
-again:
- bio = btrfs_bio_alloc(dev->bdev, physical >> 9, nr_vecs, GFP_NOFS);
- if (!bio)
- return -ENOMEM;
-
- while (bvec <= (first_bio->bi_io_vec + first_bio->bi_vcnt - 1)) {
- if (bio_add_page(bio, bvec->bv_page, bvec->bv_len,
- bvec->bv_offset) < bvec->bv_len) {
- u64 len = bio->bi_iter.bi_size;
-
- atomic_inc(&bbio->stripes_pending);
- submit_stripe_bio(root, bbio, bio, physical, dev_nr,
- rw, async);
- physical += len;
- goto again;
- }
- bvec++;
- }
-
- submit_stripe_bio(root, bbio, bio, physical, dev_nr, rw, async);
- return 0;
-}
-
static void bbio_error(struct btrfs_bio *bbio, struct bio *bio, u64 logical)
{
atomic_inc(&bbio->error);
@@ -5816,12 +6020,10 @@ static void bbio_error(struct btrfs_bio *bbio, struct bio *bio, u64 logical)
/* Shoud be the original bio. */
WARN_ON(bio != bbio->orig_bio);
- bio->bi_private = bbio->private;
- bio->bi_end_io = bbio->end_io;
btrfs_io_bio(bio)->mirror_num = bbio->mirror_num;
bio->bi_iter.bi_sector = logical >> 9;
-
- btrfs_end_bbio(bbio, bio, -EIO);
+ bio->bi_error = -EIO;
+ btrfs_end_bbio(bbio, bio);
}
}
@@ -5883,25 +6085,11 @@ int btrfs_map_bio(struct btrfs_root *root, int rw, struct bio *bio,
continue;
}
- /*
- * Check and see if we're ok with this bio based on it's size
- * and offset with the given device.
- */
- if (!bio_size_ok(dev->bdev, first_bio,
- bbio->stripes[dev_nr].physical >> 9)) {
- ret = breakup_stripe_bio(root, bbio, first_bio, dev,
- dev_nr, rw, async_submit);
- BUG_ON(ret);
- continue;
- }
-
if (dev_nr < total_devs - 1) {
bio = btrfs_bio_clone(first_bio, GFP_NOFS);
BUG_ON(!bio); /* -ENOMEM */
- } else {
+ } else
bio = first_bio;
- bbio->flags |= BTRFS_BIO_ORIG_BIO_SUBMITTED;
- }
submit_stripe_bio(root, bbio, bio,
bbio->stripes[dev_nr].physical, dev_nr, rw,
@@ -6078,6 +6266,8 @@ static int read_one_chunk(struct btrfs_root *root, struct btrfs_key *key,
free_extent_map(em);
return -EIO;
}
+ btrfs_warn(root->fs_info, "devid %llu uuid %pU is missing",
+ devid, uuid);
}
map->stripes[i].dev->in_fs_metadata = 1;
}
@@ -6197,10 +6387,11 @@ static int read_one_dev(struct btrfs_root *root,
if (!btrfs_test_opt(root, DEGRADED))
return -EIO;
- btrfs_warn(root->fs_info, "devid %llu missing", devid);
device = add_missing_dev(root, fs_devices, devid, dev_uuid);
if (!device)
return -ENOMEM;
+ btrfs_warn(root->fs_info, "devid %llu uuid %pU missing",
+ devid, dev_uuid);
} else {
if (!device->bdev && !btrfs_test_opt(root, DEGRADED))
return -EIO;
@@ -6322,6 +6513,14 @@ int btrfs_read_sys_array(struct btrfs_root *root)
goto out_short_read;
num_stripes = btrfs_chunk_num_stripes(sb, chunk);
+ if (!num_stripes) {
+ printk(KERN_ERR
+ "BTRFS: invalid number of stripes %u in sys_array at offset %u\n",
+ num_stripes, cur_offset);
+ ret = -EIO;
+ break;
+ }
+
len = btrfs_chunk_item_size(num_stripes);
if (cur_offset + len > array_size)
goto out_short_read;
@@ -6517,8 +6716,8 @@ static int update_dev_stat_item(struct btrfs_trans_handle *trans,
BUG_ON(!path);
ret = btrfs_search_slot(trans, dev_root, &key, path, -1, 1);
if (ret < 0) {
- printk_in_rcu(KERN_WARNING "BTRFS: "
- "error %d while searching for dev_stats item for device %s!\n",
+ btrfs_warn_in_rcu(dev_root->fs_info,
+ "error %d while searching for dev_stats item for device %s",
ret, rcu_str_deref(device->name));
goto out;
}
@@ -6528,8 +6727,8 @@ static int update_dev_stat_item(struct btrfs_trans_handle *trans,
/* need to delete old one and insert a new one */
ret = btrfs_del_item(trans, dev_root, path);
if (ret != 0) {
- printk_in_rcu(KERN_WARNING "BTRFS: "
- "delete too small dev_stats item for device %s failed %d!\n",
+ btrfs_warn_in_rcu(dev_root->fs_info,
+ "delete too small dev_stats item for device %s failed %d",
rcu_str_deref(device->name), ret);
goto out;
}
@@ -6542,9 +6741,9 @@ static int update_dev_stat_item(struct btrfs_trans_handle *trans,
ret = btrfs_insert_empty_item(trans, dev_root, path,
&key, sizeof(*ptr));
if (ret < 0) {
- printk_in_rcu(KERN_WARNING "BTRFS: "
- "insert dev_stats item for device %s failed %d!\n",
- rcu_str_deref(device->name), ret);
+ btrfs_warn_in_rcu(dev_root->fs_info,
+ "insert dev_stats item for device %s failed %d",
+ rcu_str_deref(device->name), ret);
goto out;
}
}
@@ -6598,8 +6797,8 @@ static void btrfs_dev_stat_print_on_error(struct btrfs_device *dev)
{
if (!dev->dev_stats_valid)
return;
- printk_ratelimited_in_rcu(KERN_ERR "BTRFS: "
- "bdev %s errs: wr %u, rd %u, flush %u, corrupt %u, gen %u\n",
+ btrfs_err_rl_in_rcu(dev->dev_root->fs_info,
+ "bdev %s errs: wr %u, rd %u, flush %u, corrupt %u, gen %u",
rcu_str_deref(dev->name),
btrfs_dev_stat_read(dev, BTRFS_DEV_STAT_WRITE_ERRS),
btrfs_dev_stat_read(dev, BTRFS_DEV_STAT_READ_ERRS),
@@ -6618,8 +6817,8 @@ static void btrfs_dev_stat_print_on_load(struct btrfs_device *dev)
if (i == BTRFS_DEV_STAT_VALUES_MAX)
return; /* all values == 0, suppress message */
- printk_in_rcu(KERN_INFO "BTRFS: "
- "bdev %s errs: wr %u, rd %u, flush %u, corrupt %u, gen %u\n",
+ btrfs_info_in_rcu(dev->dev_root->fs_info,
+ "bdev %s errs: wr %u, rd %u, flush %u, corrupt %u, gen %u",
rcu_str_deref(dev->name),
btrfs_dev_stat_read(dev, BTRFS_DEV_STAT_WRITE_ERRS),
btrfs_dev_stat_read(dev, BTRFS_DEV_STAT_READ_ERRS),
@@ -6663,22 +6862,34 @@ int btrfs_get_dev_stats(struct btrfs_root *root,
return 0;
}
-int btrfs_scratch_superblock(struct btrfs_device *device)
+void btrfs_scratch_superblocks(struct block_device *bdev, char *device_path)
{
struct buffer_head *bh;
struct btrfs_super_block *disk_super;
+ int copy_num;
- bh = btrfs_read_dev_super(device->bdev);
- if (!bh)
- return -EINVAL;
- disk_super = (struct btrfs_super_block *)bh->b_data;
+ if (!bdev)
+ return;
- memset(&disk_super->magic, 0, sizeof(disk_super->magic));
- set_buffer_dirty(bh);
- sync_dirty_buffer(bh);
- brelse(bh);
+ for (copy_num = 0; copy_num < BTRFS_SUPER_MIRROR_MAX;
+ copy_num++) {
- return 0;
+ if (btrfs_read_dev_one_super(bdev, copy_num, &bh))
+ continue;
+
+ disk_super = (struct btrfs_super_block *)bh->b_data;
+
+ memset(&disk_super->magic, 0, sizeof(disk_super->magic));
+ set_buffer_dirty(bh);
+ sync_dirty_buffer(bh);
+ brelse(bh);
+ }
+
+ /* Notify udev that device has changed */
+ btrfs_kobject_uevent(bdev, KOBJ_CHANGE);
+
+ /* Update ctime/mtime for device path for libblkid */
+ update_dev_time(device_path);
}
/*
@@ -6728,3 +6939,56 @@ void btrfs_update_commit_device_bytes_used(struct btrfs_root *root,
}
unlock_chunks(root);
}
+
+void btrfs_set_fs_info_ptr(struct btrfs_fs_info *fs_info)
+{
+ struct btrfs_fs_devices *fs_devices = fs_info->fs_devices;
+ while (fs_devices) {
+ fs_devices->fs_info = fs_info;
+ fs_devices = fs_devices->seed;
+ }
+}
+
+void btrfs_reset_fs_info_ptr(struct btrfs_fs_info *fs_info)
+{
+ struct btrfs_fs_devices *fs_devices = fs_info->fs_devices;
+ while (fs_devices) {
+ fs_devices->fs_info = NULL;
+ fs_devices = fs_devices->seed;
+ }
+}
+
+void btrfs_close_one_device(struct btrfs_device *device)
+{
+ struct btrfs_fs_devices *fs_devices = device->fs_devices;
+ struct btrfs_device *new_device;
+ struct rcu_string *name;
+
+ if (device->bdev)
+ fs_devices->open_devices--;
+
+ if (device->writeable &&
+ device->devid != BTRFS_DEV_REPLACE_DEVID) {
+ list_del_init(&device->dev_alloc_list);
+ fs_devices->rw_devices--;
+ }
+
+ if (device->missing)
+ fs_devices->missing_devices--;
+
+ new_device = btrfs_alloc_device(NULL, &device->devid,
+ device->uuid);
+ BUG_ON(IS_ERR(new_device)); /* -ENOMEM */
+
+ /* Safe because we are under uuid_mutex */
+ if (device->name) {
+ name = rcu_string_strdup(device->name->str, GFP_NOFS);
+ BUG_ON(!name); /* -ENOMEM */
+ rcu_assign_pointer(new_device->name, name);
+ }
+
+ list_replace_rcu(&device->dev_list, &new_device->dev_list);
+ new_device->fs_devices = device->fs_devices;
+
+ call_rcu(&device->rcu, free_device);
+}
diff --git a/kernel/fs/btrfs/volumes.h b/kernel/fs/btrfs/volumes.h
index ebc31331a..d5c84f6b1 100644
--- a/kernel/fs/btrfs/volumes.h
+++ b/kernel/fs/btrfs/volumes.h
@@ -253,6 +253,12 @@ struct btrfs_fs_devices {
* nonrot flag set
*/
int rotating;
+
+ struct btrfs_fs_info *fs_info;
+ /* sysfs kobjects */
+ struct kobject fsid_kobj;
+ struct kobject *device_dir_kobj;
+ struct completion kobj_unregister;
};
#define BTRFS_BIO_INLINE_CSUM_SIZE 64
@@ -292,8 +298,6 @@ struct btrfs_bio_stripe {
struct btrfs_bio;
typedef void (btrfs_bio_end_io_t) (struct btrfs_bio *bio, int err);
-#define BTRFS_BIO_ORIG_BIO_SUBMITTED (1 << 0)
-
struct btrfs_bio {
atomic_t refs;
atomic_t stripes_pending;
@@ -330,10 +334,15 @@ struct btrfs_raid_attr {
int dev_stripes; /* stripes per dev */
int devs_max; /* max devs to use */
int devs_min; /* min devs needed */
+ int tolerated_failures; /* max tolerated fail devs */
int devs_increment; /* ndevs has to be a multiple of this */
int ncopies; /* how many copies to data has */
};
+extern const struct btrfs_raid_attr btrfs_raid_array[BTRFS_NR_RAID_TYPES];
+
+extern const u64 btrfs_raid_group[BTRFS_NR_RAID_TYPES];
+
struct map_lookup {
u64 type;
int io_align;
@@ -371,6 +380,20 @@ struct map_lookup {
#define BTRFS_BALANCE_ARGS_DRANGE (1ULL << 3)
#define BTRFS_BALANCE_ARGS_VRANGE (1ULL << 4)
#define BTRFS_BALANCE_ARGS_LIMIT (1ULL << 5)
+#define BTRFS_BALANCE_ARGS_LIMIT_RANGE (1ULL << 6)
+#define BTRFS_BALANCE_ARGS_STRIPES_RANGE (1ULL << 7)
+#define BTRFS_BALANCE_ARGS_USAGE_RANGE (1ULL << 10)
+
+#define BTRFS_BALANCE_ARGS_MASK \
+ (BTRFS_BALANCE_ARGS_PROFILES | \
+ BTRFS_BALANCE_ARGS_USAGE | \
+ BTRFS_BALANCE_ARGS_DEVID | \
+ BTRFS_BALANCE_ARGS_DRANGE | \
+ BTRFS_BALANCE_ARGS_VRANGE | \
+ BTRFS_BALANCE_ARGS_LIMIT | \
+ BTRFS_BALANCE_ARGS_LIMIT_RANGE | \
+ BTRFS_BALANCE_ARGS_STRIPES_RANGE | \
+ BTRFS_BALANCE_ARGS_USAGE_RANGE)
/*
* Profile changing flags. When SOFT is set we won't relocate chunk if
@@ -449,6 +472,9 @@ int btrfs_cancel_balance(struct btrfs_fs_info *fs_info);
int btrfs_create_uuid_tree(struct btrfs_fs_info *fs_info);
int btrfs_check_uuid_tree(struct btrfs_fs_info *fs_info);
int btrfs_chunk_readonly(struct btrfs_root *root, u64 chunk_offset);
+int find_free_dev_extent_start(struct btrfs_transaction *transaction,
+ struct btrfs_device *device, u64 num_bytes,
+ u64 search_start, u64 *start, u64 *max_avail);
int find_free_dev_extent(struct btrfs_trans_handle *trans,
struct btrfs_device *device, u64 num_bytes,
u64 *start, u64 *max_avail);
@@ -467,7 +493,7 @@ void btrfs_destroy_dev_replace_tgtdev(struct btrfs_fs_info *fs_info,
struct btrfs_device *tgtdev);
void btrfs_init_dev_replace_tgtdev_for_resume(struct btrfs_fs_info *fs_info,
struct btrfs_device *tgtdev);
-int btrfs_scratch_superblock(struct btrfs_device *device);
+void btrfs_scratch_superblocks(struct block_device *bdev, char *device_path);
int btrfs_is_parity_mirror(struct btrfs_mapping_tree *map_tree,
u64 logical, u64 len, int mirror_num);
unsigned long btrfs_full_stripe_len(struct btrfs_root *root,
@@ -537,5 +563,9 @@ static inline void unlock_chunks(struct btrfs_root *root)
mutex_unlock(&root->fs_info->chunk_mutex);
}
+struct list_head *btrfs_get_fs_uuids(void);
+void btrfs_set_fs_info_ptr(struct btrfs_fs_info *fs_info);
+void btrfs_reset_fs_info_ptr(struct btrfs_fs_info *fs_info);
+void btrfs_close_one_device(struct btrfs_device *device);
#endif
diff --git a/kernel/fs/btrfs/xattr.c b/kernel/fs/btrfs/xattr.c
index 6f518c90e..1fcd7b6e7 100644
--- a/kernel/fs/btrfs/xattr.c
+++ b/kernel/fs/btrfs/xattr.c
@@ -313,8 +313,10 @@ ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size)
/* check to make sure this item is what we want */
if (found_key.objectid != key.objectid)
break;
- if (found_key.type != BTRFS_XATTR_ITEM_KEY)
+ if (found_key.type > BTRFS_XATTR_ITEM_KEY)
break;
+ if (found_key.type < BTRFS_XATTR_ITEM_KEY)
+ goto next;
di = btrfs_item_ptr(leaf, slot, struct btrfs_dir_item);
if (verify_dir_item(root, leaf, di))