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-rw-r--r--kernel/drivers/md/bcache/super.c48
-rw-r--r--kernel/drivers/md/dm-cache-metadata.c122
-rw-r--r--kernel/drivers/md/dm-cache-metadata.h4
-rw-r--r--kernel/drivers/md/dm-cache-target.c12
-rw-r--r--kernel/drivers/md/dm-crypt.c38
-rw-r--r--kernel/drivers/md/dm-flakey.c34
-rw-r--r--kernel/drivers/md/dm-log-writes.c10
-rw-r--r--kernel/drivers/md/dm-mpath.c6
-rw-r--r--kernel/drivers/md/dm-raid1.c1
-rw-r--r--kernel/drivers/md/dm-snap.c9
-rw-r--r--kernel/drivers/md/dm-table.c36
-rw-r--r--kernel/drivers/md/dm-thin-metadata.c5
-rw-r--r--kernel/drivers/md/dm.c43
-rw-r--r--kernel/drivers/md/md.c16
-rw-r--r--kernel/drivers/md/multipath.c4
-rw-r--r--kernel/drivers/md/persistent-data/dm-space-map-metadata.c14
-rw-r--r--kernel/drivers/md/raid1.c7
-rw-r--r--kernel/drivers/md/raid10.c7
-rw-r--r--kernel/drivers/md/raid5.c60
-rw-r--r--kernel/drivers/md/raid5.h4
20 files changed, 307 insertions, 173 deletions
diff --git a/kernel/drivers/md/bcache/super.c b/kernel/drivers/md/bcache/super.c
index 8d0ead98e..3d5c0ba13 100644
--- a/kernel/drivers/md/bcache/super.c
+++ b/kernel/drivers/md/bcache/super.c
@@ -1015,8 +1015,12 @@ int bch_cached_dev_attach(struct cached_dev *dc, struct cache_set *c)
*/
atomic_set(&dc->count, 1);
- if (bch_cached_dev_writeback_start(dc))
+ /* Block writeback thread, but spawn it */
+ down_write(&dc->writeback_lock);
+ if (bch_cached_dev_writeback_start(dc)) {
+ up_write(&dc->writeback_lock);
return -ENOMEM;
+ }
if (BDEV_STATE(&dc->sb) == BDEV_STATE_DIRTY) {
bch_sectors_dirty_init(dc);
@@ -1028,6 +1032,9 @@ int bch_cached_dev_attach(struct cached_dev *dc, struct cache_set *c)
bch_cached_dev_run(dc);
bcache_device_link(&dc->disk, c, "bdev");
+ /* Allow the writeback thread to proceed */
+ up_write(&dc->writeback_lock);
+
pr_info("Caching %s as %s on set %pU",
bdevname(dc->bdev, buf), dc->disk.disk->disk_name,
dc->disk.c->sb.set_uuid);
@@ -1366,6 +1373,9 @@ static void cache_set_flush(struct closure *cl)
struct btree *b;
unsigned i;
+ if (!c)
+ closure_return(cl);
+
bch_cache_accounting_destroy(&c->accounting);
kobject_put(&c->internal);
@@ -1808,7 +1818,7 @@ static int cache_alloc(struct cache_sb *sb, struct cache *ca)
free = roundup_pow_of_two(ca->sb.nbuckets) >> 10;
if (!init_fifo(&ca->free[RESERVE_BTREE], 8, GFP_KERNEL) ||
- !init_fifo(&ca->free[RESERVE_PRIO], prio_buckets(ca), GFP_KERNEL) ||
+ !init_fifo_exact(&ca->free[RESERVE_PRIO], prio_buckets(ca), GFP_KERNEL) ||
!init_fifo(&ca->free[RESERVE_MOVINGGC], free, GFP_KERNEL) ||
!init_fifo(&ca->free[RESERVE_NONE], free, GFP_KERNEL) ||
!init_fifo(&ca->free_inc, free << 2, GFP_KERNEL) ||
@@ -1828,11 +1838,12 @@ static int cache_alloc(struct cache_sb *sb, struct cache *ca)
return 0;
}
-static void register_cache(struct cache_sb *sb, struct page *sb_page,
+static int register_cache(struct cache_sb *sb, struct page *sb_page,
struct block_device *bdev, struct cache *ca)
{
char name[BDEVNAME_SIZE];
- const char *err = "cannot allocate memory";
+ const char *err = NULL;
+ int ret = 0;
memcpy(&ca->sb, sb, sizeof(struct cache_sb));
ca->bdev = bdev;
@@ -1847,27 +1858,35 @@ static void register_cache(struct cache_sb *sb, struct page *sb_page,
if (blk_queue_discard(bdev_get_queue(ca->bdev)))
ca->discard = CACHE_DISCARD(&ca->sb);
- if (cache_alloc(sb, ca) != 0)
+ ret = cache_alloc(sb, ca);
+ if (ret != 0)
goto err;
- err = "error creating kobject";
- if (kobject_add(&ca->kobj, &part_to_dev(bdev->bd_part)->kobj, "bcache"))
- goto err;
+ if (kobject_add(&ca->kobj, &part_to_dev(bdev->bd_part)->kobj, "bcache")) {
+ err = "error calling kobject_add";
+ ret = -ENOMEM;
+ goto out;
+ }
mutex_lock(&bch_register_lock);
err = register_cache_set(ca);
mutex_unlock(&bch_register_lock);
- if (err)
- goto err;
+ if (err) {
+ ret = -ENODEV;
+ goto out;
+ }
pr_info("registered cache device %s", bdevname(bdev, name));
+
out:
kobject_put(&ca->kobj);
- return;
+
err:
- pr_notice("error opening %s: %s", bdevname(bdev, name), err);
- goto out;
+ if (err)
+ pr_notice("error opening %s: %s", bdevname(bdev, name), err);
+
+ return ret;
}
/* Global interfaces/init */
@@ -1965,7 +1984,8 @@ static ssize_t register_bcache(struct kobject *k, struct kobj_attribute *attr,
if (!ca)
goto err_close;
- register_cache(sb, sb_page, bdev, ca);
+ if (register_cache(sb, sb_page, bdev, ca) != 0)
+ goto err_close;
}
out:
if (sb_page)
diff --git a/kernel/drivers/md/dm-cache-metadata.c b/kernel/drivers/md/dm-cache-metadata.c
index f6543f3a9..3970cda10 100644
--- a/kernel/drivers/md/dm-cache-metadata.c
+++ b/kernel/drivers/md/dm-cache-metadata.c
@@ -867,18 +867,55 @@ static int blocks_are_unmapped_or_clean(struct dm_cache_metadata *cmd,
return 0;
}
-#define WRITE_LOCK(cmd) \
- if (cmd->fail_io || dm_bm_is_read_only(cmd->bm)) \
- return -EINVAL; \
- down_write(&cmd->root_lock)
+static bool cmd_write_lock(struct dm_cache_metadata *cmd)
+{
+ down_write(&cmd->root_lock);
+ if (cmd->fail_io || dm_bm_is_read_only(cmd->bm)) {
+ up_write(&cmd->root_lock);
+ return false;
+ }
+ return true;
+}
+
+#define WRITE_LOCK(cmd) \
+ do { \
+ if (!cmd_write_lock((cmd))) \
+ return -EINVAL; \
+ } while(0)
-#define WRITE_LOCK_VOID(cmd) \
- if (cmd->fail_io || dm_bm_is_read_only(cmd->bm)) \
- return; \
- down_write(&cmd->root_lock)
+#define WRITE_LOCK_VOID(cmd) \
+ do { \
+ if (!cmd_write_lock((cmd))) \
+ return; \
+ } while(0)
#define WRITE_UNLOCK(cmd) \
- up_write(&cmd->root_lock)
+ up_write(&(cmd)->root_lock)
+
+static bool cmd_read_lock(struct dm_cache_metadata *cmd)
+{
+ down_read(&cmd->root_lock);
+ if (cmd->fail_io) {
+ up_read(&cmd->root_lock);
+ return false;
+ }
+ return true;
+}
+
+#define READ_LOCK(cmd) \
+ do { \
+ if (!cmd_read_lock((cmd))) \
+ return -EINVAL; \
+ } while(0)
+
+#define READ_LOCK_VOID(cmd) \
+ do { \
+ if (!cmd_read_lock((cmd))) \
+ return; \
+ } while(0)
+
+#define READ_UNLOCK(cmd) \
+ up_read(&(cmd)->root_lock)
int dm_cache_resize(struct dm_cache_metadata *cmd, dm_cblock_t new_cache_size)
{
@@ -1015,22 +1052,20 @@ int dm_cache_load_discards(struct dm_cache_metadata *cmd,
{
int r;
- down_read(&cmd->root_lock);
+ READ_LOCK(cmd);
r = __load_discards(cmd, fn, context);
- up_read(&cmd->root_lock);
+ READ_UNLOCK(cmd);
return r;
}
-dm_cblock_t dm_cache_size(struct dm_cache_metadata *cmd)
+int dm_cache_size(struct dm_cache_metadata *cmd, dm_cblock_t *result)
{
- dm_cblock_t r;
-
- down_read(&cmd->root_lock);
- r = cmd->cache_blocks;
- up_read(&cmd->root_lock);
+ READ_LOCK(cmd);
+ *result = cmd->cache_blocks;
+ READ_UNLOCK(cmd);
- return r;
+ return 0;
}
static int __remove(struct dm_cache_metadata *cmd, dm_cblock_t cblock)
@@ -1188,9 +1223,9 @@ int dm_cache_load_mappings(struct dm_cache_metadata *cmd,
{
int r;
- down_read(&cmd->root_lock);
+ READ_LOCK(cmd);
r = __load_mappings(cmd, policy, fn, context);
- up_read(&cmd->root_lock);
+ READ_UNLOCK(cmd);
return r;
}
@@ -1215,18 +1250,18 @@ static int __dump_mappings(struct dm_cache_metadata *cmd)
void dm_cache_dump(struct dm_cache_metadata *cmd)
{
- down_read(&cmd->root_lock);
+ READ_LOCK_VOID(cmd);
__dump_mappings(cmd);
- up_read(&cmd->root_lock);
+ READ_UNLOCK(cmd);
}
int dm_cache_changed_this_transaction(struct dm_cache_metadata *cmd)
{
int r;
- down_read(&cmd->root_lock);
+ READ_LOCK(cmd);
r = cmd->changed;
- up_read(&cmd->root_lock);
+ READ_UNLOCK(cmd);
return r;
}
@@ -1276,9 +1311,9 @@ int dm_cache_set_dirty(struct dm_cache_metadata *cmd,
void dm_cache_metadata_get_stats(struct dm_cache_metadata *cmd,
struct dm_cache_statistics *stats)
{
- down_read(&cmd->root_lock);
+ READ_LOCK_VOID(cmd);
*stats = cmd->stats;
- up_read(&cmd->root_lock);
+ READ_UNLOCK(cmd);
}
void dm_cache_metadata_set_stats(struct dm_cache_metadata *cmd,
@@ -1312,9 +1347,9 @@ int dm_cache_get_free_metadata_block_count(struct dm_cache_metadata *cmd,
{
int r = -EINVAL;
- down_read(&cmd->root_lock);
+ READ_LOCK(cmd);
r = dm_sm_get_nr_free(cmd->metadata_sm, result);
- up_read(&cmd->root_lock);
+ READ_UNLOCK(cmd);
return r;
}
@@ -1324,9 +1359,9 @@ int dm_cache_get_metadata_dev_size(struct dm_cache_metadata *cmd,
{
int r = -EINVAL;
- down_read(&cmd->root_lock);
+ READ_LOCK(cmd);
r = dm_sm_get_nr_blocks(cmd->metadata_sm, result);
- up_read(&cmd->root_lock);
+ READ_UNLOCK(cmd);
return r;
}
@@ -1417,7 +1452,13 @@ int dm_cache_write_hints(struct dm_cache_metadata *cmd, struct dm_cache_policy *
int dm_cache_metadata_all_clean(struct dm_cache_metadata *cmd, bool *result)
{
- return blocks_are_unmapped_or_clean(cmd, 0, cmd->cache_blocks, result);
+ int r;
+
+ READ_LOCK(cmd);
+ r = blocks_are_unmapped_or_clean(cmd, 0, cmd->cache_blocks, result);
+ READ_UNLOCK(cmd);
+
+ return r;
}
void dm_cache_metadata_set_read_only(struct dm_cache_metadata *cmd)
@@ -1440,10 +1481,7 @@ int dm_cache_metadata_set_needs_check(struct dm_cache_metadata *cmd)
struct dm_block *sblock;
struct cache_disk_superblock *disk_super;
- /*
- * We ignore fail_io for this function.
- */
- down_write(&cmd->root_lock);
+ WRITE_LOCK(cmd);
set_bit(NEEDS_CHECK, &cmd->flags);
r = superblock_lock(cmd, &sblock);
@@ -1458,19 +1496,17 @@ int dm_cache_metadata_set_needs_check(struct dm_cache_metadata *cmd)
dm_bm_unlock(sblock);
out:
- up_write(&cmd->root_lock);
+ WRITE_UNLOCK(cmd);
return r;
}
-bool dm_cache_metadata_needs_check(struct dm_cache_metadata *cmd)
+int dm_cache_metadata_needs_check(struct dm_cache_metadata *cmd, bool *result)
{
- bool needs_check;
+ READ_LOCK(cmd);
+ *result = !!test_bit(NEEDS_CHECK, &cmd->flags);
+ READ_UNLOCK(cmd);
- down_read(&cmd->root_lock);
- needs_check = !!test_bit(NEEDS_CHECK, &cmd->flags);
- up_read(&cmd->root_lock);
-
- return needs_check;
+ return 0;
}
int dm_cache_metadata_abort(struct dm_cache_metadata *cmd)
diff --git a/kernel/drivers/md/dm-cache-metadata.h b/kernel/drivers/md/dm-cache-metadata.h
index 2ffee21f3..852874419 100644
--- a/kernel/drivers/md/dm-cache-metadata.h
+++ b/kernel/drivers/md/dm-cache-metadata.h
@@ -66,7 +66,7 @@ void dm_cache_metadata_close(struct dm_cache_metadata *cmd);
* origin blocks to map to.
*/
int dm_cache_resize(struct dm_cache_metadata *cmd, dm_cblock_t new_cache_size);
-dm_cblock_t dm_cache_size(struct dm_cache_metadata *cmd);
+int dm_cache_size(struct dm_cache_metadata *cmd, dm_cblock_t *result);
int dm_cache_discard_bitset_resize(struct dm_cache_metadata *cmd,
sector_t discard_block_size,
@@ -137,7 +137,7 @@ int dm_cache_write_hints(struct dm_cache_metadata *cmd, struct dm_cache_policy *
*/
int dm_cache_metadata_all_clean(struct dm_cache_metadata *cmd, bool *result);
-bool dm_cache_metadata_needs_check(struct dm_cache_metadata *cmd);
+int dm_cache_metadata_needs_check(struct dm_cache_metadata *cmd, bool *result);
int dm_cache_metadata_set_needs_check(struct dm_cache_metadata *cmd);
void dm_cache_metadata_set_read_only(struct dm_cache_metadata *cmd);
void dm_cache_metadata_set_read_write(struct dm_cache_metadata *cmd);
diff --git a/kernel/drivers/md/dm-cache-target.c b/kernel/drivers/md/dm-cache-target.c
index 2fd4c8296..515f83e7d 100644
--- a/kernel/drivers/md/dm-cache-target.c
+++ b/kernel/drivers/md/dm-cache-target.c
@@ -987,9 +987,14 @@ static void notify_mode_switch(struct cache *cache, enum cache_metadata_mode mod
static void set_cache_mode(struct cache *cache, enum cache_metadata_mode new_mode)
{
- bool needs_check = dm_cache_metadata_needs_check(cache->cmd);
+ bool needs_check;
enum cache_metadata_mode old_mode = get_cache_mode(cache);
+ if (dm_cache_metadata_needs_check(cache->cmd, &needs_check)) {
+ DMERR("unable to read needs_check flag, setting failure mode");
+ new_mode = CM_FAIL;
+ }
+
if (new_mode == CM_WRITE && needs_check) {
DMERR("%s: unable to switch cache to write mode until repaired.",
cache_device_name(cache));
@@ -3513,6 +3518,7 @@ static void cache_status(struct dm_target *ti, status_type_t type,
char buf[BDEVNAME_SIZE];
struct cache *cache = ti->private;
dm_cblock_t residency;
+ bool needs_check;
switch (type) {
case STATUSTYPE_INFO:
@@ -3586,7 +3592,9 @@ static void cache_status(struct dm_target *ti, status_type_t type,
else
DMEMIT("rw ");
- if (dm_cache_metadata_needs_check(cache->cmd))
+ r = dm_cache_metadata_needs_check(cache->cmd, &needs_check);
+
+ if (r || needs_check)
DMEMIT("needs_check ");
else
DMEMIT("- ");
diff --git a/kernel/drivers/md/dm-crypt.c b/kernel/drivers/md/dm-crypt.c
index 3147c8d09..de628883e 100644
--- a/kernel/drivers/md/dm-crypt.c
+++ b/kernel/drivers/md/dm-crypt.c
@@ -112,8 +112,7 @@ struct iv_tcw_private {
* and encrypts / decrypts at the same time.
*/
enum flags { DM_CRYPT_SUSPENDED, DM_CRYPT_KEY_VALID,
- DM_CRYPT_SAME_CPU, DM_CRYPT_NO_OFFLOAD,
- DM_CRYPT_EXIT_THREAD};
+ DM_CRYPT_SAME_CPU, DM_CRYPT_NO_OFFLOAD };
/*
* The fields in here must be read only after initialization.
@@ -1204,18 +1203,20 @@ continue_locked:
if (!RB_EMPTY_ROOT(&cc->write_tree))
goto pop_from_list;
- if (unlikely(test_bit(DM_CRYPT_EXIT_THREAD, &cc->flags))) {
- spin_unlock_irq(&cc->write_thread_wait.lock);
- break;
- }
-
- __set_current_state(TASK_INTERRUPTIBLE);
+ set_current_state(TASK_INTERRUPTIBLE);
__add_wait_queue(&cc->write_thread_wait, &wait);
spin_unlock_irq(&cc->write_thread_wait.lock);
+ if (unlikely(kthread_should_stop())) {
+ set_task_state(current, TASK_RUNNING);
+ remove_wait_queue(&cc->write_thread_wait, &wait);
+ break;
+ }
+
schedule();
+ set_task_state(current, TASK_RUNNING);
spin_lock_irq(&cc->write_thread_wait.lock);
__remove_wait_queue(&cc->write_thread_wait, &wait);
goto continue_locked;
@@ -1499,12 +1500,15 @@ static int crypt_set_key(struct crypt_config *cc, char *key)
if (!cc->key_size && strcmp(key, "-"))
goto out;
+ /* clear the flag since following operations may invalidate previously valid key */
+ clear_bit(DM_CRYPT_KEY_VALID, &cc->flags);
+
if (cc->key_size && crypt_decode_key(cc->key, key, cc->key_size) < 0)
goto out;
- set_bit(DM_CRYPT_KEY_VALID, &cc->flags);
-
r = crypt_setkey_allcpus(cc);
+ if (!r)
+ set_bit(DM_CRYPT_KEY_VALID, &cc->flags);
out:
/* Hex key string not needed after here, so wipe it. */
@@ -1530,13 +1534,8 @@ static void crypt_dtr(struct dm_target *ti)
if (!cc)
return;
- if (cc->write_thread) {
- spin_lock_irq(&cc->write_thread_wait.lock);
- set_bit(DM_CRYPT_EXIT_THREAD, &cc->flags);
- wake_up_locked(&cc->write_thread_wait);
- spin_unlock_irq(&cc->write_thread_wait.lock);
+ if (cc->write_thread)
kthread_stop(cc->write_thread);
- }
if (cc->io_queue)
destroy_workqueue(cc->io_queue);
@@ -1920,6 +1919,13 @@ static int crypt_map(struct dm_target *ti, struct bio *bio)
return DM_MAPIO_REMAPPED;
}
+ /*
+ * Check if bio is too large, split as needed.
+ */
+ if (unlikely(bio->bi_iter.bi_size > (BIO_MAX_PAGES << PAGE_SHIFT)) &&
+ bio_data_dir(bio) == WRITE)
+ dm_accept_partial_bio(bio, ((BIO_MAX_PAGES << PAGE_SHIFT) >> SECTOR_SHIFT));
+
io = dm_per_bio_data(bio, cc->per_bio_data_size);
crypt_io_init(io, cc, bio, dm_target_offset(ti, bio->bi_iter.bi_sector));
io->ctx.req = (struct ablkcipher_request *)(io + 1);
diff --git a/kernel/drivers/md/dm-flakey.c b/kernel/drivers/md/dm-flakey.c
index 09e2afcaf..78f403b45 100644
--- a/kernel/drivers/md/dm-flakey.c
+++ b/kernel/drivers/md/dm-flakey.c
@@ -200,11 +200,13 @@ static int flakey_ctr(struct dm_target *ti, unsigned int argc, char **argv)
if (!(fc->up_interval + fc->down_interval)) {
ti->error = "Total (up + down) interval is zero";
+ r = -EINVAL;
goto bad;
}
if (fc->up_interval + fc->down_interval < fc->up_interval) {
ti->error = "Interval overflow";
+ r = -EINVAL;
goto bad;
}
@@ -289,10 +291,14 @@ static int flakey_map(struct dm_target *ti, struct bio *bio)
pb->bio_submitted = true;
/*
- * Map reads as normal.
+ * Error reads if neither corrupt_bio_byte or drop_writes are set.
+ * Otherwise, flakey_end_io() will decide if the reads should be modified.
*/
- if (bio_data_dir(bio) == READ)
+ if (bio_data_dir(bio) == READ) {
+ if (!fc->corrupt_bio_byte && !test_bit(DROP_WRITES, &fc->flags))
+ return -EIO;
goto map_bio;
+ }
/*
* Drop writes?
@@ -328,14 +334,22 @@ static int flakey_end_io(struct dm_target *ti, struct bio *bio, int error)
struct flakey_c *fc = ti->private;
struct per_bio_data *pb = dm_per_bio_data(bio, sizeof(struct per_bio_data));
- /*
- * Corrupt successful READs while in down state.
- * If flags were specified, only corrupt those that match.
- */
- if (fc->corrupt_bio_byte && !error && pb->bio_submitted &&
- (bio_data_dir(bio) == READ) && (fc->corrupt_bio_rw == READ) &&
- all_corrupt_bio_flags_match(bio, fc))
- corrupt_bio_data(bio, fc);
+ if (!error && pb->bio_submitted && (bio_data_dir(bio) == READ)) {
+ if (fc->corrupt_bio_byte && (fc->corrupt_bio_rw == READ) &&
+ all_corrupt_bio_flags_match(bio, fc)) {
+ /*
+ * Corrupt successful matching READs while in down state.
+ */
+ corrupt_bio_data(bio, fc);
+
+ } else if (!test_bit(DROP_WRITES, &fc->flags)) {
+ /*
+ * Error read during the down_interval if drop_writes
+ * wasn't configured.
+ */
+ return -EIO;
+ }
+ }
return error;
}
diff --git a/kernel/drivers/md/dm-log-writes.c b/kernel/drivers/md/dm-log-writes.c
index 624589d51..c8b513ee1 100644
--- a/kernel/drivers/md/dm-log-writes.c
+++ b/kernel/drivers/md/dm-log-writes.c
@@ -258,12 +258,12 @@ static int log_one_block(struct log_writes_c *lc,
goto out;
sector++;
- bio = bio_alloc(GFP_KERNEL, block->vec_cnt);
+ atomic_inc(&lc->io_blocks);
+ bio = bio_alloc(GFP_KERNEL, min(block->vec_cnt, BIO_MAX_PAGES));
if (!bio) {
DMERR("Couldn't alloc log bio");
goto error;
}
- atomic_inc(&lc->io_blocks);
bio->bi_iter.bi_size = 0;
bio->bi_iter.bi_sector = sector;
bio->bi_bdev = lc->logdev->bdev;
@@ -280,7 +280,7 @@ static int log_one_block(struct log_writes_c *lc,
if (ret != block->vecs[i].bv_len) {
atomic_inc(&lc->io_blocks);
submit_bio(WRITE, bio);
- bio = bio_alloc(GFP_KERNEL, block->vec_cnt - i);
+ bio = bio_alloc(GFP_KERNEL, min(block->vec_cnt - i, BIO_MAX_PAGES));
if (!bio) {
DMERR("Couldn't alloc log bio");
goto error;
@@ -456,9 +456,9 @@ static int log_writes_ctr(struct dm_target *ti, unsigned int argc, char **argv)
goto bad;
}
- ret = -EINVAL;
lc->log_kthread = kthread_run(log_writes_kthread, lc, "log-write");
- if (!lc->log_kthread) {
+ if (IS_ERR(lc->log_kthread)) {
+ ret = PTR_ERR(lc->log_kthread);
ti->error = "Couldn't alloc kthread";
dm_put_device(ti, lc->dev);
dm_put_device(ti, lc->logdev);
diff --git a/kernel/drivers/md/dm-mpath.c b/kernel/drivers/md/dm-mpath.c
index cfa29f574..5b2ef9660 100644
--- a/kernel/drivers/md/dm-mpath.c
+++ b/kernel/drivers/md/dm-mpath.c
@@ -1220,10 +1220,10 @@ static void activate_path(struct work_struct *work)
{
struct pgpath *pgpath =
container_of(work, struct pgpath, activate_path.work);
+ struct request_queue *q = bdev_get_queue(pgpath->path.dev->bdev);
- if (pgpath->is_active)
- scsi_dh_activate(bdev_get_queue(pgpath->path.dev->bdev),
- pg_init_done, pgpath);
+ if (pgpath->is_active && !blk_queue_dying(q))
+ scsi_dh_activate(q, pg_init_done, pgpath);
else
pg_init_done(pgpath, SCSI_DH_DEV_OFFLINED);
}
diff --git a/kernel/drivers/md/dm-raid1.c b/kernel/drivers/md/dm-raid1.c
index f2a363a89..115bd3846 100644
--- a/kernel/drivers/md/dm-raid1.c
+++ b/kernel/drivers/md/dm-raid1.c
@@ -1288,6 +1288,7 @@ static int mirror_end_io(struct dm_target *ti, struct bio *bio, int error)
dm_bio_restore(bd, bio);
bio_record->details.bi_bdev = NULL;
+ bio->bi_error = 0;
queue_bio(ms, bio, rw);
return DM_ENDIO_INCOMPLETE;
diff --git a/kernel/drivers/md/dm-snap.c b/kernel/drivers/md/dm-snap.c
index 61f184ad0..e108deebb 100644
--- a/kernel/drivers/md/dm-snap.c
+++ b/kernel/drivers/md/dm-snap.c
@@ -1106,6 +1106,7 @@ static int snapshot_ctr(struct dm_target *ti, unsigned int argc, char **argv)
int i;
int r = -EINVAL;
char *origin_path, *cow_path;
+ dev_t origin_dev, cow_dev;
unsigned args_used, num_flush_bios = 1;
fmode_t origin_mode = FMODE_READ;
@@ -1136,11 +1137,19 @@ static int snapshot_ctr(struct dm_target *ti, unsigned int argc, char **argv)
ti->error = "Cannot get origin device";
goto bad_origin;
}
+ origin_dev = s->origin->bdev->bd_dev;
cow_path = argv[0];
argv++;
argc--;
+ cow_dev = dm_get_dev_t(cow_path);
+ if (cow_dev && cow_dev == origin_dev) {
+ ti->error = "COW device cannot be the same as origin device";
+ r = -EINVAL;
+ goto bad_cow;
+ }
+
r = dm_get_device(ti, cow_path, dm_table_get_mode(ti->table), &s->cow);
if (r) {
ti->error = "Cannot get COW device";
diff --git a/kernel/drivers/md/dm-table.c b/kernel/drivers/md/dm-table.c
index 061152a43..cb5d0daf5 100644
--- a/kernel/drivers/md/dm-table.c
+++ b/kernel/drivers/md/dm-table.c
@@ -365,6 +365,26 @@ static int upgrade_mode(struct dm_dev_internal *dd, fmode_t new_mode,
}
/*
+ * Convert the path to a device
+ */
+dev_t dm_get_dev_t(const char *path)
+{
+ dev_t uninitialized_var(dev);
+ struct block_device *bdev;
+
+ bdev = lookup_bdev(path);
+ if (IS_ERR(bdev))
+ dev = name_to_dev_t(path);
+ else {
+ dev = bdev->bd_dev;
+ bdput(bdev);
+ }
+
+ return dev;
+}
+EXPORT_SYMBOL_GPL(dm_get_dev_t);
+
+/*
* Add a device to the list, or just increment the usage count if
* it's already present.
*/
@@ -372,23 +392,15 @@ int dm_get_device(struct dm_target *ti, const char *path, fmode_t mode,
struct dm_dev **result)
{
int r;
- dev_t uninitialized_var(dev);
+ dev_t dev;
struct dm_dev_internal *dd;
struct dm_table *t = ti->table;
- struct block_device *bdev;
BUG_ON(!t);
- /* convert the path to a device */
- bdev = lookup_bdev(path);
- if (IS_ERR(bdev)) {
- dev = name_to_dev_t(path);
- if (!dev)
- return -ENODEV;
- } else {
- dev = bdev->bd_dev;
- bdput(bdev);
- }
+ dev = dm_get_dev_t(path);
+ if (!dev)
+ return -ENODEV;
dd = find_device(&t->devices, dev);
if (!dd) {
diff --git a/kernel/drivers/md/dm-thin-metadata.c b/kernel/drivers/md/dm-thin-metadata.c
index c219a053c..911ada643 100644
--- a/kernel/drivers/md/dm-thin-metadata.c
+++ b/kernel/drivers/md/dm-thin-metadata.c
@@ -1943,5 +1943,8 @@ bool dm_pool_metadata_needs_check(struct dm_pool_metadata *pmd)
void dm_pool_issue_prefetches(struct dm_pool_metadata *pmd)
{
- dm_tm_issue_prefetches(pmd->tm);
+ down_read(&pmd->root_lock);
+ if (!pmd->fail_io)
+ dm_tm_issue_prefetches(pmd->tm);
+ up_read(&pmd->root_lock);
}
diff --git a/kernel/drivers/md/dm.c b/kernel/drivers/md/dm.c
index 4745d2f13..170a3c2d8 100644
--- a/kernel/drivers/md/dm.c
+++ b/kernel/drivers/md/dm.c
@@ -1109,12 +1109,8 @@ static void rq_completed(struct mapped_device *md, int rw, bool run_queue)
* back into ->request_fn() could deadlock attempting to grab the
* queue lock again.
*/
- if (run_queue) {
- if (md->queue->mq_ops)
- blk_mq_run_hw_queues(md->queue, true);
- else
- blk_run_queue_async(md->queue);
- }
+ if (!md->queue->mq_ops && run_queue)
+ blk_run_queue_async(md->queue);
/*
* dm_put() must be at the end of this function. See the comment above
@@ -1214,9 +1210,9 @@ static void dm_requeue_original_request(struct mapped_device *md,
{
int rw = rq_data_dir(rq);
+ rq_end_stats(md, rq);
dm_unprep_request(rq);
- rq_end_stats(md, rq);
if (!rq->q->mq_ops)
old_requeue_request(rq);
else {
@@ -1336,7 +1332,10 @@ static void dm_complete_request(struct request *rq, int error)
struct dm_rq_target_io *tio = tio_from_request(rq);
tio->error = error;
- blk_complete_request(rq);
+ if (!rq->q->mq_ops)
+ blk_complete_request(rq);
+ else
+ blk_mq_complete_request(rq, error);
}
/*
@@ -2261,8 +2260,6 @@ static void cleanup_mapped_device(struct mapped_device *md)
if (md->bs)
bioset_free(md->bs);
- cleanup_srcu_struct(&md->io_barrier);
-
if (md->disk) {
spin_lock(&_minor_lock);
md->disk->private_data = NULL;
@@ -2274,6 +2271,8 @@ static void cleanup_mapped_device(struct mapped_device *md)
if (md->queue)
blk_cleanup_queue(md->queue);
+ cleanup_srcu_struct(&md->io_barrier);
+
if (md->bdev) {
bdput(md->bdev);
md->bdev = NULL;
@@ -2870,6 +2869,7 @@ EXPORT_SYMBOL_GPL(dm_device_name);
static void __dm_destroy(struct mapped_device *md, bool wait)
{
+ struct request_queue *q = dm_get_md_queue(md);
struct dm_table *map;
int srcu_idx;
@@ -2880,6 +2880,10 @@ static void __dm_destroy(struct mapped_device *md, bool wait)
set_bit(DMF_FREEING, &md->flags);
spin_unlock(&_minor_lock);
+ spin_lock_irq(q->queue_lock);
+ queue_flag_set(QUEUE_FLAG_DYING, q);
+ spin_unlock_irq(q->queue_lock);
+
if (dm_request_based(md) && md->kworker_task)
flush_kthread_worker(&md->kworker);
@@ -3079,7 +3083,8 @@ static void unlock_fs(struct mapped_device *md)
* Caller must hold md->suspend_lock
*/
static int __dm_suspend(struct mapped_device *md, struct dm_table *map,
- unsigned suspend_flags, int interruptible)
+ unsigned suspend_flags, int interruptible,
+ int dmf_suspended_flag)
{
bool do_lockfs = suspend_flags & DM_SUSPEND_LOCKFS_FLAG;
bool noflush = suspend_flags & DM_SUSPEND_NOFLUSH_FLAG;
@@ -3146,6 +3151,8 @@ static int __dm_suspend(struct mapped_device *md, struct dm_table *map,
* to finish.
*/
r = dm_wait_for_completion(md, interruptible);
+ if (!r)
+ set_bit(dmf_suspended_flag, &md->flags);
if (noflush)
clear_bit(DMF_NOFLUSH_SUSPENDING, &md->flags);
@@ -3207,12 +3214,10 @@ retry:
map = rcu_dereference_protected(md->map, lockdep_is_held(&md->suspend_lock));
- r = __dm_suspend(md, map, suspend_flags, TASK_INTERRUPTIBLE);
+ r = __dm_suspend(md, map, suspend_flags, TASK_INTERRUPTIBLE, DMF_SUSPENDED);
if (r)
goto out_unlock;
- set_bit(DMF_SUSPENDED, &md->flags);
-
dm_table_postsuspend_targets(map);
out_unlock:
@@ -3245,10 +3250,11 @@ static int __dm_resume(struct mapped_device *md, struct dm_table *map)
int dm_resume(struct mapped_device *md)
{
- int r = -EINVAL;
+ int r;
struct dm_table *map = NULL;
retry:
+ r = -EINVAL;
mutex_lock_nested(&md->suspend_lock, SINGLE_DEPTH_NESTING);
if (!dm_suspended_md(md))
@@ -3272,8 +3278,6 @@ retry:
goto out;
clear_bit(DMF_SUSPENDED, &md->flags);
-
- r = 0;
out:
mutex_unlock(&md->suspend_lock);
@@ -3306,9 +3310,8 @@ static void __dm_internal_suspend(struct mapped_device *md, unsigned suspend_fla
* would require changing .presuspend to return an error -- avoid this
* until there is a need for more elaborate variants of internal suspend.
*/
- (void) __dm_suspend(md, map, suspend_flags, TASK_UNINTERRUPTIBLE);
-
- set_bit(DMF_SUSPENDED_INTERNALLY, &md->flags);
+ (void) __dm_suspend(md, map, suspend_flags, TASK_UNINTERRUPTIBLE,
+ DMF_SUSPENDED_INTERNALLY);
dm_table_postsuspend_targets(map);
}
diff --git a/kernel/drivers/md/md.c b/kernel/drivers/md/md.c
index b1e1f6b95..eff554a12 100644
--- a/kernel/drivers/md/md.c
+++ b/kernel/drivers/md/md.c
@@ -293,6 +293,8 @@ static blk_qc_t md_make_request(struct request_queue *q, struct bio *bio)
* go away inside make_request
*/
sectors = bio_sectors(bio);
+ /* bio could be mergeable after passing to underlayer */
+ bio->bi_rw &= ~REQ_NOMERGE;
mddev->pers->make_request(mddev, bio);
cpu = part_stat_lock();
@@ -6769,7 +6771,7 @@ static int md_ioctl(struct block_device *bdev, fmode_t mode,
/* need to ensure recovery thread has run */
wait_event_interruptible_timeout(mddev->sb_wait,
!test_bit(MD_RECOVERY_NEEDED,
- &mddev->flags),
+ &mddev->recovery),
msecs_to_jiffies(5000));
if (cmd == STOP_ARRAY || cmd == STOP_ARRAY_RO) {
/* Need to flush page cache, and ensure no-one else opens
@@ -7570,16 +7572,12 @@ EXPORT_SYMBOL(unregister_md_cluster_operations);
int md_setup_cluster(struct mddev *mddev, int nodes)
{
- int err;
-
- err = request_module("md-cluster");
- if (err) {
- pr_err("md-cluster module not found.\n");
- return -ENOENT;
- }
-
+ if (!md_cluster_ops)
+ request_module("md-cluster");
spin_lock(&pers_lock);
+ /* ensure module won't be unloaded */
if (!md_cluster_ops || !try_module_get(md_cluster_mod)) {
+ pr_err("can't find md-cluster module or get it's reference.\n");
spin_unlock(&pers_lock);
return -ENOENT;
}
diff --git a/kernel/drivers/md/multipath.c b/kernel/drivers/md/multipath.c
index 0a72ab6e6..dd483bb2e 100644
--- a/kernel/drivers/md/multipath.c
+++ b/kernel/drivers/md/multipath.c
@@ -129,7 +129,9 @@ static void multipath_make_request(struct mddev *mddev, struct bio * bio)
}
multipath = conf->multipaths + mp_bh->path;
- mp_bh->bio = *bio;
+ bio_init(&mp_bh->bio);
+ __bio_clone_fast(&mp_bh->bio, bio);
+
mp_bh->bio.bi_iter.bi_sector += multipath->rdev->data_offset;
mp_bh->bio.bi_bdev = multipath->rdev->bdev;
mp_bh->bio.bi_rw |= REQ_FAILFAST_TRANSPORT;
diff --git a/kernel/drivers/md/persistent-data/dm-space-map-metadata.c b/kernel/drivers/md/persistent-data/dm-space-map-metadata.c
index 7e4400559..20557e2c6 100644
--- a/kernel/drivers/md/persistent-data/dm-space-map-metadata.c
+++ b/kernel/drivers/md/persistent-data/dm-space-map-metadata.c
@@ -775,17 +775,15 @@ int dm_sm_metadata_create(struct dm_space_map *sm,
memcpy(&smm->sm, &bootstrap_ops, sizeof(smm->sm));
r = sm_ll_new_metadata(&smm->ll, tm);
+ if (!r) {
+ if (nr_blocks > DM_SM_METADATA_MAX_BLOCKS)
+ nr_blocks = DM_SM_METADATA_MAX_BLOCKS;
+ r = sm_ll_extend(&smm->ll, nr_blocks);
+ }
+ memcpy(&smm->sm, &ops, sizeof(smm->sm));
if (r)
return r;
- if (nr_blocks > DM_SM_METADATA_MAX_BLOCKS)
- nr_blocks = DM_SM_METADATA_MAX_BLOCKS;
- r = sm_ll_extend(&smm->ll, nr_blocks);
- if (r)
- return r;
-
- memcpy(&smm->sm, &ops, sizeof(smm->sm));
-
/*
* Now we need to update the newly created data structures with the
* allocated blocks that they were built from.
diff --git a/kernel/drivers/md/raid1.c b/kernel/drivers/md/raid1.c
index c4b913409..515554c73 100644
--- a/kernel/drivers/md/raid1.c
+++ b/kernel/drivers/md/raid1.c
@@ -2274,6 +2274,7 @@ static void handle_write_finished(struct r1conf *conf, struct r1bio *r1_bio)
if (fail) {
spin_lock_irq(&conf->device_lock);
list_add(&r1_bio->retry_list, &conf->bio_end_io_list);
+ conf->nr_queued++;
spin_unlock_irq(&conf->device_lock);
md_wakeup_thread(conf->mddev->thread);
} else {
@@ -2391,8 +2392,10 @@ static void raid1d(struct md_thread *thread)
LIST_HEAD(tmp);
spin_lock_irqsave(&conf->device_lock, flags);
if (!test_bit(MD_CHANGE_PENDING, &mddev->flags)) {
- list_add(&tmp, &conf->bio_end_io_list);
- list_del_init(&conf->bio_end_io_list);
+ while (!list_empty(&conf->bio_end_io_list)) {
+ list_move(conf->bio_end_io_list.prev, &tmp);
+ conf->nr_queued--;
+ }
}
spin_unlock_irqrestore(&conf->device_lock, flags);
while (!list_empty(&tmp)) {
diff --git a/kernel/drivers/md/raid10.c b/kernel/drivers/md/raid10.c
index ce959b4ae..ebb0dd612 100644
--- a/kernel/drivers/md/raid10.c
+++ b/kernel/drivers/md/raid10.c
@@ -2664,6 +2664,7 @@ static void handle_write_completed(struct r10conf *conf, struct r10bio *r10_bio)
if (fail) {
spin_lock_irq(&conf->device_lock);
list_add(&r10_bio->retry_list, &conf->bio_end_io_list);
+ conf->nr_queued++;
spin_unlock_irq(&conf->device_lock);
md_wakeup_thread(conf->mddev->thread);
} else {
@@ -2691,8 +2692,10 @@ static void raid10d(struct md_thread *thread)
LIST_HEAD(tmp);
spin_lock_irqsave(&conf->device_lock, flags);
if (!test_bit(MD_CHANGE_PENDING, &mddev->flags)) {
- list_add(&tmp, &conf->bio_end_io_list);
- list_del_init(&conf->bio_end_io_list);
+ while (!list_empty(&conf->bio_end_io_list)) {
+ list_move(conf->bio_end_io_list.prev, &tmp);
+ conf->nr_queued--;
+ }
}
spin_unlock_irqrestore(&conf->device_lock, flags);
while (!list_empty(&tmp)) {
diff --git a/kernel/drivers/md/raid5.c b/kernel/drivers/md/raid5.c
index adf72a9b6..16cf94bbb 100644
--- a/kernel/drivers/md/raid5.c
+++ b/kernel/drivers/md/raid5.c
@@ -340,8 +340,7 @@ static void release_inactive_stripe_list(struct r5conf *conf,
int hash)
{
int size;
- unsigned long do_wakeup = 0;
- int i = 0;
+ bool do_wakeup = false;
unsigned long flags;
if (hash == NR_STRIPE_HASH_LOCKS) {
@@ -362,19 +361,15 @@ static void release_inactive_stripe_list(struct r5conf *conf,
!list_empty(list))
atomic_dec(&conf->empty_inactive_list_nr);
list_splice_tail_init(list, conf->inactive_list + hash);
- do_wakeup |= 1 << hash;
+ do_wakeup = true;
spin_unlock_irqrestore(conf->hash_locks + hash, flags);
}
size--;
hash--;
}
- for (i = 0; i < NR_STRIPE_HASH_LOCKS; i++) {
- if (do_wakeup & (1 << i))
- wake_up(&conf->wait_for_stripe[i]);
- }
-
if (do_wakeup) {
+ wake_up(&conf->wait_for_stripe);
if (atomic_read(&conf->active_stripes) == 0)
wake_up(&conf->wait_for_quiescent);
if (conf->retry_read_aligned)
@@ -687,15 +682,14 @@ raid5_get_active_stripe(struct r5conf *conf, sector_t sector,
if (!sh) {
set_bit(R5_INACTIVE_BLOCKED,
&conf->cache_state);
- wait_event_exclusive_cmd(
- conf->wait_for_stripe[hash],
+ wait_event_lock_irq(
+ conf->wait_for_stripe,
!list_empty(conf->inactive_list + hash) &&
(atomic_read(&conf->active_stripes)
< (conf->max_nr_stripes * 3 / 4)
|| !test_bit(R5_INACTIVE_BLOCKED,
&conf->cache_state)),
- spin_unlock_irq(conf->hash_locks + hash),
- spin_lock_irq(conf->hash_locks + hash));
+ *(conf->hash_locks + hash));
clear_bit(R5_INACTIVE_BLOCKED,
&conf->cache_state);
} else {
@@ -720,9 +714,6 @@ raid5_get_active_stripe(struct r5conf *conf, sector_t sector,
}
} while (sh == NULL);
- if (!list_empty(conf->inactive_list + hash))
- wake_up(&conf->wait_for_stripe[hash]);
-
spin_unlock_irq(conf->hash_locks + hash);
return sh;
}
@@ -2093,6 +2084,14 @@ static int resize_chunks(struct r5conf *conf, int new_disks, int new_sectors)
unsigned long cpu;
int err = 0;
+ /*
+ * Never shrink. And mddev_suspend() could deadlock if this is called
+ * from raid5d. In that case, scribble_disks and scribble_sectors
+ * should equal to new_disks and new_sectors
+ */
+ if (conf->scribble_disks >= new_disks &&
+ conf->scribble_sectors >= new_sectors)
+ return 0;
mddev_suspend(conf->mddev);
get_online_cpus();
for_each_present_cpu(cpu) {
@@ -2114,6 +2113,10 @@ static int resize_chunks(struct r5conf *conf, int new_disks, int new_sectors)
}
put_online_cpus();
mddev_resume(conf->mddev);
+ if (!err) {
+ conf->scribble_disks = new_disks;
+ conf->scribble_sectors = new_sectors;
+ }
return err;
}
@@ -2194,7 +2197,7 @@ static int resize_stripes(struct r5conf *conf, int newsize)
cnt = 0;
list_for_each_entry(nsh, &newstripes, lru) {
lock_device_hash_lock(conf, hash);
- wait_event_exclusive_cmd(conf->wait_for_stripe[hash],
+ wait_event_cmd(conf->wait_for_stripe,
!list_empty(conf->inactive_list + hash),
unlock_device_hash_lock(conf, hash),
lock_device_hash_lock(conf, hash));
@@ -4240,7 +4243,6 @@ static void break_stripe_batch_list(struct stripe_head *head_sh,
WARN_ON_ONCE(sh->state & ((1 << STRIPE_ACTIVE) |
(1 << STRIPE_SYNCING) |
(1 << STRIPE_REPLACED) |
- (1 << STRIPE_PREREAD_ACTIVE) |
(1 << STRIPE_DELAYED) |
(1 << STRIPE_BIT_DELAY) |
(1 << STRIPE_FULL_WRITE) |
@@ -4255,6 +4257,7 @@ static void break_stripe_batch_list(struct stripe_head *head_sh,
(1 << STRIPE_REPLACED)));
set_mask_bits(&sh->state, ~(STRIPE_EXPAND_SYNC_FLAGS |
+ (1 << STRIPE_PREREAD_ACTIVE) |
(1 << STRIPE_DEGRADED)),
head_sh->state & (1 << STRIPE_INSYNC));
@@ -6417,6 +6420,12 @@ static int raid5_alloc_percpu(struct r5conf *conf)
}
put_online_cpus();
+ if (!err) {
+ conf->scribble_disks = max(conf->raid_disks,
+ conf->previous_raid_disks);
+ conf->scribble_sectors = max(conf->chunk_sectors,
+ conf->prev_chunk_sectors);
+ }
return err;
}
@@ -6507,9 +6516,7 @@ static struct r5conf *setup_conf(struct mddev *mddev)
seqcount_init(&conf->gen_lock);
mutex_init(&conf->cache_size_mutex);
init_waitqueue_head(&conf->wait_for_quiescent);
- for (i = 0; i < NR_STRIPE_HASH_LOCKS; i++) {
- init_waitqueue_head(&conf->wait_for_stripe[i]);
- }
+ init_waitqueue_head(&conf->wait_for_stripe);
init_waitqueue_head(&conf->wait_for_overlap);
INIT_LIST_HEAD(&conf->handle_list);
INIT_LIST_HEAD(&conf->hold_list);
@@ -6976,6 +6983,15 @@ static int run(struct mddev *mddev)
stripe = (stripe | (stripe-1)) + 1;
mddev->queue->limits.discard_alignment = stripe;
mddev->queue->limits.discard_granularity = stripe;
+
+ /*
+ * We use 16-bit counter of active stripes in bi_phys_segments
+ * (minus one for over-loaded initialization)
+ */
+ blk_queue_max_hw_sectors(mddev->queue, 0xfffe * STRIPE_SECTORS);
+ blk_queue_max_discard_sectors(mddev->queue,
+ 0xfffe * STRIPE_SECTORS);
+
/*
* unaligned part of discard request will be ignored, so can't
* guarantee discard_zeroes_data
@@ -7018,8 +7034,8 @@ static int run(struct mddev *mddev)
}
if (discard_supported &&
- mddev->queue->limits.max_discard_sectors >= stripe &&
- mddev->queue->limits.discard_granularity >= stripe)
+ mddev->queue->limits.max_discard_sectors >= (stripe >> 9) &&
+ mddev->queue->limits.discard_granularity >= stripe)
queue_flag_set_unlocked(QUEUE_FLAG_DISCARD,
mddev->queue);
else
diff --git a/kernel/drivers/md/raid5.h b/kernel/drivers/md/raid5.h
index 3f0c2e2a3..efe91887e 100644
--- a/kernel/drivers/md/raid5.h
+++ b/kernel/drivers/md/raid5.h
@@ -511,6 +511,8 @@ struct r5conf {
* conversions
*/
} __percpu *percpu;
+ int scribble_disks;
+ int scribble_sectors;
#ifdef CONFIG_HOTPLUG_CPU
struct notifier_block cpu_notify;
#endif
@@ -523,7 +525,7 @@ struct r5conf {
atomic_t empty_inactive_list_nr;
struct llist_head released_stripes;
wait_queue_head_t wait_for_quiescent;
- wait_queue_head_t wait_for_stripe[NR_STRIPE_HASH_LOCKS];
+ wait_queue_head_t wait_for_stripe;
wait_queue_head_t wait_for_overlap;
unsigned long cache_state;
#define R5_INACTIVE_BLOCKED 1 /* release of inactive stripes blocked,