diff options
Diffstat (limited to 'kernel/fs/f2fs/data.c')
| -rw-r--r-- | kernel/fs/f2fs/data.c | 1626 |
1 files changed, 730 insertions, 896 deletions
diff --git a/kernel/fs/f2fs/data.c b/kernel/fs/f2fs/data.c index 1e1aae669..972eab7ac 100644 --- a/kernel/fs/f2fs/data.c +++ b/kernel/fs/f2fs/data.c @@ -14,10 +14,12 @@ #include <linux/mpage.h> #include <linux/writeback.h> #include <linux/backing-dev.h> +#include <linux/pagevec.h> #include <linux/blkdev.h> #include <linux/bio.h> #include <linux/prefetch.h> #include <linux/uio.h> +#include <linux/cleancache.h> #include "f2fs.h" #include "node.h" @@ -25,18 +27,24 @@ #include "trace.h" #include <trace/events/f2fs.h> -static struct kmem_cache *extent_tree_slab; -static struct kmem_cache *extent_node_slab; - -static void f2fs_read_end_io(struct bio *bio, int err) +static void f2fs_read_end_io(struct bio *bio) { struct bio_vec *bvec; int i; + if (f2fs_bio_encrypted(bio)) { + if (bio->bi_error) { + f2fs_release_crypto_ctx(bio->bi_private); + } else { + f2fs_end_io_crypto_work(bio->bi_private, bio); + return; + } + } + bio_for_each_segment_all(bvec, bio, i) { struct page *page = bvec->bv_page; - if (!err) { + if (!bio->bi_error) { SetPageUptodate(page); } else { ClearPageUptodate(page); @@ -47,7 +55,7 @@ static void f2fs_read_end_io(struct bio *bio, int err) bio_put(bio); } -static void f2fs_write_end_io(struct bio *bio, int err) +static void f2fs_write_end_io(struct bio *bio) { struct f2fs_sb_info *sbi = bio->bi_private; struct bio_vec *bvec; @@ -56,7 +64,9 @@ static void f2fs_write_end_io(struct bio *bio, int err) bio_for_each_segment_all(bvec, bio, i) { struct page *page = bvec->bv_page; - if (unlikely(err)) { + f2fs_restore_and_release_control_page(&page); + + if (unlikely(bio->bi_error)) { set_page_dirty(page); set_bit(AS_EIO, &page->mapping->flags); f2fs_stop_checkpoint(sbi); @@ -80,13 +90,12 @@ static struct bio *__bio_alloc(struct f2fs_sb_info *sbi, block_t blk_addr, { struct bio *bio; - /* No failure on bio allocation */ - bio = bio_alloc(GFP_NOIO, npages); + bio = f2fs_bio_alloc(npages); bio->bi_bdev = sbi->sb->s_bdev; bio->bi_iter.bi_sector = SECTOR_FROM_BLOCK(blk_addr); bio->bi_end_io = is_read ? f2fs_read_end_io : f2fs_write_end_io; - bio->bi_private = sbi; + bio->bi_private = is_read ? NULL : sbi; return bio; } @@ -133,20 +142,19 @@ void f2fs_submit_merged_bio(struct f2fs_sb_info *sbi, * Fill the locked page with data located in the block address. * Return unlocked page. */ -int f2fs_submit_page_bio(struct f2fs_sb_info *sbi, struct page *page, - struct f2fs_io_info *fio) +int f2fs_submit_page_bio(struct f2fs_io_info *fio) { struct bio *bio; + struct page *page = fio->encrypted_page ? fio->encrypted_page : fio->page; trace_f2fs_submit_page_bio(page, fio); - f2fs_trace_ios(page, fio, 0); + f2fs_trace_ios(fio, 0); /* Allocate a new bio */ - bio = __bio_alloc(sbi, fio->blk_addr, 1, is_read_io(fio->rw)); + bio = __bio_alloc(fio->sbi, fio->blk_addr, 1, is_read_io(fio->rw)); if (bio_add_page(bio, page, PAGE_CACHE_SIZE, 0) < PAGE_CACHE_SIZE) { bio_put(bio); - f2fs_put_page(page, 1); return -EFAULT; } @@ -154,12 +162,13 @@ int f2fs_submit_page_bio(struct f2fs_sb_info *sbi, struct page *page, return 0; } -void f2fs_submit_page_mbio(struct f2fs_sb_info *sbi, struct page *page, - struct f2fs_io_info *fio) +void f2fs_submit_page_mbio(struct f2fs_io_info *fio) { + struct f2fs_sb_info *sbi = fio->sbi; enum page_type btype = PAGE_TYPE_OF_BIO(fio->type); struct f2fs_bio_info *io; bool is_read = is_read_io(fio->rw); + struct page *bio_page; io = is_read ? &sbi->read_io : &sbi->write_io[btype]; @@ -181,17 +190,19 @@ alloc_new: io->fio = *fio; } - if (bio_add_page(io->bio, page, PAGE_CACHE_SIZE, 0) < + bio_page = fio->encrypted_page ? fio->encrypted_page : fio->page; + + if (bio_add_page(io->bio, bio_page, PAGE_CACHE_SIZE, 0) < PAGE_CACHE_SIZE) { __submit_merged_bio(io); goto alloc_new; } io->last_block_in_bio = fio->blk_addr; - f2fs_trace_ios(page, fio, 0); + f2fs_trace_ios(fio, 0); up_write(&io->io_rwsem); - trace_f2fs_submit_page_mbio(page, fio); + trace_f2fs_submit_page_mbio(fio->page, fio); } /* @@ -251,661 +262,21 @@ int f2fs_reserve_block(struct dnode_of_data *dn, pgoff_t index) return err; } -static void f2fs_map_bh(struct super_block *sb, pgoff_t pgofs, - struct extent_info *ei, struct buffer_head *bh_result) -{ - unsigned int blkbits = sb->s_blocksize_bits; - size_t max_size = bh_result->b_size; - size_t mapped_size; - - clear_buffer_new(bh_result); - map_bh(bh_result, sb, ei->blk + pgofs - ei->fofs); - mapped_size = (ei->fofs + ei->len - pgofs) << blkbits; - bh_result->b_size = min(max_size, mapped_size); -} - -static bool lookup_extent_info(struct inode *inode, pgoff_t pgofs, - struct extent_info *ei) -{ - struct f2fs_inode_info *fi = F2FS_I(inode); - pgoff_t start_fofs, end_fofs; - block_t start_blkaddr; - - read_lock(&fi->ext_lock); - if (fi->ext.len == 0) { - read_unlock(&fi->ext_lock); - return false; - } - - stat_inc_total_hit(inode->i_sb); - - start_fofs = fi->ext.fofs; - end_fofs = fi->ext.fofs + fi->ext.len - 1; - start_blkaddr = fi->ext.blk; - - if (pgofs >= start_fofs && pgofs <= end_fofs) { - *ei = fi->ext; - stat_inc_read_hit(inode->i_sb); - read_unlock(&fi->ext_lock); - return true; - } - read_unlock(&fi->ext_lock); - return false; -} - -static bool update_extent_info(struct inode *inode, pgoff_t fofs, - block_t blkaddr) -{ - struct f2fs_inode_info *fi = F2FS_I(inode); - pgoff_t start_fofs, end_fofs; - block_t start_blkaddr, end_blkaddr; - int need_update = true; - - write_lock(&fi->ext_lock); - - start_fofs = fi->ext.fofs; - end_fofs = fi->ext.fofs + fi->ext.len - 1; - start_blkaddr = fi->ext.blk; - end_blkaddr = fi->ext.blk + fi->ext.len - 1; - - /* Drop and initialize the matched extent */ - if (fi->ext.len == 1 && fofs == start_fofs) - fi->ext.len = 0; - - /* Initial extent */ - if (fi->ext.len == 0) { - if (blkaddr != NULL_ADDR) { - fi->ext.fofs = fofs; - fi->ext.blk = blkaddr; - fi->ext.len = 1; - } - goto end_update; - } - - /* Front merge */ - if (fofs == start_fofs - 1 && blkaddr == start_blkaddr - 1) { - fi->ext.fofs--; - fi->ext.blk--; - fi->ext.len++; - goto end_update; - } - - /* Back merge */ - if (fofs == end_fofs + 1 && blkaddr == end_blkaddr + 1) { - fi->ext.len++; - goto end_update; - } - - /* Split the existing extent */ - if (fi->ext.len > 1 && - fofs >= start_fofs && fofs <= end_fofs) { - if ((end_fofs - fofs) < (fi->ext.len >> 1)) { - fi->ext.len = fofs - start_fofs; - } else { - fi->ext.fofs = fofs + 1; - fi->ext.blk = start_blkaddr + fofs - start_fofs + 1; - fi->ext.len -= fofs - start_fofs + 1; - } - } else { - need_update = false; - } - - /* Finally, if the extent is very fragmented, let's drop the cache. */ - if (fi->ext.len < F2FS_MIN_EXTENT_LEN) { - fi->ext.len = 0; - set_inode_flag(fi, FI_NO_EXTENT); - need_update = true; - } -end_update: - write_unlock(&fi->ext_lock); - return need_update; -} - -static struct extent_node *__attach_extent_node(struct f2fs_sb_info *sbi, - struct extent_tree *et, struct extent_info *ei, - struct rb_node *parent, struct rb_node **p) +int f2fs_get_block(struct dnode_of_data *dn, pgoff_t index) { - struct extent_node *en; - - en = kmem_cache_alloc(extent_node_slab, GFP_ATOMIC); - if (!en) - return NULL; - - en->ei = *ei; - INIT_LIST_HEAD(&en->list); - - rb_link_node(&en->rb_node, parent, p); - rb_insert_color(&en->rb_node, &et->root); - et->count++; - atomic_inc(&sbi->total_ext_node); - return en; -} - -static void __detach_extent_node(struct f2fs_sb_info *sbi, - struct extent_tree *et, struct extent_node *en) -{ - rb_erase(&en->rb_node, &et->root); - et->count--; - atomic_dec(&sbi->total_ext_node); - - if (et->cached_en == en) - et->cached_en = NULL; -} - -static struct extent_tree *__find_extent_tree(struct f2fs_sb_info *sbi, - nid_t ino) -{ - struct extent_tree *et; - - down_read(&sbi->extent_tree_lock); - et = radix_tree_lookup(&sbi->extent_tree_root, ino); - if (!et) { - up_read(&sbi->extent_tree_lock); - return NULL; - } - atomic_inc(&et->refcount); - up_read(&sbi->extent_tree_lock); - - return et; -} - -static struct extent_tree *__grab_extent_tree(struct inode *inode) -{ - struct f2fs_sb_info *sbi = F2FS_I_SB(inode); - struct extent_tree *et; - nid_t ino = inode->i_ino; - - down_write(&sbi->extent_tree_lock); - et = radix_tree_lookup(&sbi->extent_tree_root, ino); - if (!et) { - et = f2fs_kmem_cache_alloc(extent_tree_slab, GFP_NOFS); - f2fs_radix_tree_insert(&sbi->extent_tree_root, ino, et); - memset(et, 0, sizeof(struct extent_tree)); - et->ino = ino; - et->root = RB_ROOT; - et->cached_en = NULL; - rwlock_init(&et->lock); - atomic_set(&et->refcount, 0); - et->count = 0; - sbi->total_ext_tree++; - } - atomic_inc(&et->refcount); - up_write(&sbi->extent_tree_lock); - - return et; -} - -static struct extent_node *__lookup_extent_tree(struct extent_tree *et, - unsigned int fofs) -{ - struct rb_node *node = et->root.rb_node; - struct extent_node *en; - - if (et->cached_en) { - struct extent_info *cei = &et->cached_en->ei; - - if (cei->fofs <= fofs && cei->fofs + cei->len > fofs) - return et->cached_en; - } - - while (node) { - en = rb_entry(node, struct extent_node, rb_node); - - if (fofs < en->ei.fofs) { - node = node->rb_left; - } else if (fofs >= en->ei.fofs + en->ei.len) { - node = node->rb_right; - } else { - et->cached_en = en; - return en; - } - } - return NULL; -} - -static struct extent_node *__try_back_merge(struct f2fs_sb_info *sbi, - struct extent_tree *et, struct extent_node *en) -{ - struct extent_node *prev; - struct rb_node *node; - - node = rb_prev(&en->rb_node); - if (!node) - return NULL; - - prev = rb_entry(node, struct extent_node, rb_node); - if (__is_back_mergeable(&en->ei, &prev->ei)) { - en->ei.fofs = prev->ei.fofs; - en->ei.blk = prev->ei.blk; - en->ei.len += prev->ei.len; - __detach_extent_node(sbi, et, prev); - return prev; - } - return NULL; -} - -static struct extent_node *__try_front_merge(struct f2fs_sb_info *sbi, - struct extent_tree *et, struct extent_node *en) -{ - struct extent_node *next; - struct rb_node *node; - - node = rb_next(&en->rb_node); - if (!node) - return NULL; - - next = rb_entry(node, struct extent_node, rb_node); - if (__is_front_mergeable(&en->ei, &next->ei)) { - en->ei.len += next->ei.len; - __detach_extent_node(sbi, et, next); - return next; - } - return NULL; -} - -static struct extent_node *__insert_extent_tree(struct f2fs_sb_info *sbi, - struct extent_tree *et, struct extent_info *ei, - struct extent_node **den) -{ - struct rb_node **p = &et->root.rb_node; - struct rb_node *parent = NULL; - struct extent_node *en; - - while (*p) { - parent = *p; - en = rb_entry(parent, struct extent_node, rb_node); - - if (ei->fofs < en->ei.fofs) { - if (__is_front_mergeable(ei, &en->ei)) { - f2fs_bug_on(sbi, !den); - en->ei.fofs = ei->fofs; - en->ei.blk = ei->blk; - en->ei.len += ei->len; - *den = __try_back_merge(sbi, et, en); - return en; - } - p = &(*p)->rb_left; - } else if (ei->fofs >= en->ei.fofs + en->ei.len) { - if (__is_back_mergeable(ei, &en->ei)) { - f2fs_bug_on(sbi, !den); - en->ei.len += ei->len; - *den = __try_front_merge(sbi, et, en); - return en; - } - p = &(*p)->rb_right; - } else { - f2fs_bug_on(sbi, 1); - } - } - - return __attach_extent_node(sbi, et, ei, parent, p); -} - -static unsigned int __free_extent_tree(struct f2fs_sb_info *sbi, - struct extent_tree *et, bool free_all) -{ - struct rb_node *node, *next; - struct extent_node *en; - unsigned int count = et->count; - - node = rb_first(&et->root); - while (node) { - next = rb_next(node); - en = rb_entry(node, struct extent_node, rb_node); - - if (free_all) { - spin_lock(&sbi->extent_lock); - if (!list_empty(&en->list)) - list_del_init(&en->list); - spin_unlock(&sbi->extent_lock); - } - - if (free_all || list_empty(&en->list)) { - __detach_extent_node(sbi, et, en); - kmem_cache_free(extent_node_slab, en); - } - node = next; - } - - return count - et->count; -} - -static void f2fs_init_extent_tree(struct inode *inode, - struct f2fs_extent *i_ext) -{ - struct f2fs_sb_info *sbi = F2FS_I_SB(inode); - struct extent_tree *et; - struct extent_node *en; struct extent_info ei; + struct inode *inode = dn->inode; - if (le32_to_cpu(i_ext->len) < F2FS_MIN_EXTENT_LEN) - return; - - et = __grab_extent_tree(inode); - - write_lock(&et->lock); - if (et->count) - goto out; - - set_extent_info(&ei, le32_to_cpu(i_ext->fofs), - le32_to_cpu(i_ext->blk), le32_to_cpu(i_ext->len)); - - en = __insert_extent_tree(sbi, et, &ei, NULL); - if (en) { - et->cached_en = en; - - spin_lock(&sbi->extent_lock); - list_add_tail(&en->list, &sbi->extent_list); - spin_unlock(&sbi->extent_lock); - } -out: - write_unlock(&et->lock); - atomic_dec(&et->refcount); -} - -static bool f2fs_lookup_extent_tree(struct inode *inode, pgoff_t pgofs, - struct extent_info *ei) -{ - struct f2fs_sb_info *sbi = F2FS_I_SB(inode); - struct extent_tree *et; - struct extent_node *en; - - trace_f2fs_lookup_extent_tree_start(inode, pgofs); - - et = __find_extent_tree(sbi, inode->i_ino); - if (!et) - return false; - - read_lock(&et->lock); - en = __lookup_extent_tree(et, pgofs); - if (en) { - *ei = en->ei; - spin_lock(&sbi->extent_lock); - if (!list_empty(&en->list)) - list_move_tail(&en->list, &sbi->extent_list); - spin_unlock(&sbi->extent_lock); - stat_inc_read_hit(sbi->sb); - } - stat_inc_total_hit(sbi->sb); - read_unlock(&et->lock); - - trace_f2fs_lookup_extent_tree_end(inode, pgofs, en); - - atomic_dec(&et->refcount); - return en ? true : false; -} - -static void f2fs_update_extent_tree(struct inode *inode, pgoff_t fofs, - block_t blkaddr) -{ - struct f2fs_sb_info *sbi = F2FS_I_SB(inode); - struct extent_tree *et; - struct extent_node *en = NULL, *en1 = NULL, *en2 = NULL, *en3 = NULL; - struct extent_node *den = NULL; - struct extent_info ei, dei; - unsigned int endofs; - - trace_f2fs_update_extent_tree(inode, fofs, blkaddr); - - et = __grab_extent_tree(inode); - - write_lock(&et->lock); - - /* 1. lookup and remove existing extent info in cache */ - en = __lookup_extent_tree(et, fofs); - if (!en) - goto update_extent; - - dei = en->ei; - __detach_extent_node(sbi, et, en); - - /* 2. if extent can be split more, split and insert the left part */ - if (dei.len > 1) { - /* insert left part of split extent into cache */ - if (fofs - dei.fofs >= F2FS_MIN_EXTENT_LEN) { - set_extent_info(&ei, dei.fofs, dei.blk, - fofs - dei.fofs); - en1 = __insert_extent_tree(sbi, et, &ei, NULL); - } - - /* insert right part of split extent into cache */ - endofs = dei.fofs + dei.len - 1; - if (endofs - fofs >= F2FS_MIN_EXTENT_LEN) { - set_extent_info(&ei, fofs + 1, - fofs - dei.fofs + dei.blk, endofs - fofs); - en2 = __insert_extent_tree(sbi, et, &ei, NULL); - } - } - -update_extent: - /* 3. update extent in extent cache */ - if (blkaddr) { - set_extent_info(&ei, fofs, blkaddr, 1); - en3 = __insert_extent_tree(sbi, et, &ei, &den); - } - - /* 4. update in global extent list */ - spin_lock(&sbi->extent_lock); - if (en && !list_empty(&en->list)) - list_del(&en->list); - /* - * en1 and en2 split from en, they will become more and more smaller - * fragments after splitting several times. So if the length is smaller - * than F2FS_MIN_EXTENT_LEN, we will not add them into extent tree. - */ - if (en1) - list_add_tail(&en1->list, &sbi->extent_list); - if (en2) - list_add_tail(&en2->list, &sbi->extent_list); - if (en3) { - if (list_empty(&en3->list)) - list_add_tail(&en3->list, &sbi->extent_list); - else - list_move_tail(&en3->list, &sbi->extent_list); - } - if (den && !list_empty(&den->list)) - list_del(&den->list); - spin_unlock(&sbi->extent_lock); - - /* 5. release extent node */ - if (en) - kmem_cache_free(extent_node_slab, en); - if (den) - kmem_cache_free(extent_node_slab, den); - - write_unlock(&et->lock); - atomic_dec(&et->refcount); -} - -void f2fs_preserve_extent_tree(struct inode *inode) -{ - struct extent_tree *et; - struct extent_info *ext = &F2FS_I(inode)->ext; - bool sync = false; - - if (!test_opt(F2FS_I_SB(inode), EXTENT_CACHE)) - return; - - et = __find_extent_tree(F2FS_I_SB(inode), inode->i_ino); - if (!et) { - if (ext->len) { - ext->len = 0; - update_inode_page(inode); - } - return; - } - - read_lock(&et->lock); - if (et->count) { - struct extent_node *en; - - if (et->cached_en) { - en = et->cached_en; - } else { - struct rb_node *node = rb_first(&et->root); - - if (!node) - node = rb_last(&et->root); - en = rb_entry(node, struct extent_node, rb_node); - } - - if (__is_extent_same(ext, &en->ei)) - goto out; - - *ext = en->ei; - sync = true; - } else if (ext->len) { - ext->len = 0; - sync = true; - } -out: - read_unlock(&et->lock); - atomic_dec(&et->refcount); - - if (sync) - update_inode_page(inode); -} - -void f2fs_shrink_extent_tree(struct f2fs_sb_info *sbi, int nr_shrink) -{ - struct extent_tree *treevec[EXT_TREE_VEC_SIZE]; - struct extent_node *en, *tmp; - unsigned long ino = F2FS_ROOT_INO(sbi); - struct radix_tree_iter iter; - void **slot; - unsigned int found; - unsigned int node_cnt = 0, tree_cnt = 0; - - if (!test_opt(sbi, EXTENT_CACHE)) - return; - - if (available_free_memory(sbi, EXTENT_CACHE)) - return; - - spin_lock(&sbi->extent_lock); - list_for_each_entry_safe(en, tmp, &sbi->extent_list, list) { - if (!nr_shrink--) - break; - list_del_init(&en->list); - } - spin_unlock(&sbi->extent_lock); - - down_read(&sbi->extent_tree_lock); - while ((found = radix_tree_gang_lookup(&sbi->extent_tree_root, - (void **)treevec, ino, EXT_TREE_VEC_SIZE))) { - unsigned i; - - ino = treevec[found - 1]->ino + 1; - for (i = 0; i < found; i++) { - struct extent_tree *et = treevec[i]; - - atomic_inc(&et->refcount); - write_lock(&et->lock); - node_cnt += __free_extent_tree(sbi, et, false); - write_unlock(&et->lock); - atomic_dec(&et->refcount); - } - } - up_read(&sbi->extent_tree_lock); - - down_write(&sbi->extent_tree_lock); - radix_tree_for_each_slot(slot, &sbi->extent_tree_root, &iter, - F2FS_ROOT_INO(sbi)) { - struct extent_tree *et = (struct extent_tree *)*slot; - - if (!atomic_read(&et->refcount) && !et->count) { - radix_tree_delete(&sbi->extent_tree_root, et->ino); - kmem_cache_free(extent_tree_slab, et); - sbi->total_ext_tree--; - tree_cnt++; - } - } - up_write(&sbi->extent_tree_lock); - - trace_f2fs_shrink_extent_tree(sbi, node_cnt, tree_cnt); -} - -void f2fs_destroy_extent_tree(struct inode *inode) -{ - struct f2fs_sb_info *sbi = F2FS_I_SB(inode); - struct extent_tree *et; - unsigned int node_cnt = 0; - - if (!test_opt(sbi, EXTENT_CACHE)) - return; - - et = __find_extent_tree(sbi, inode->i_ino); - if (!et) - goto out; - - /* free all extent info belong to this extent tree */ - write_lock(&et->lock); - node_cnt = __free_extent_tree(sbi, et, true); - write_unlock(&et->lock); - - atomic_dec(&et->refcount); - - /* try to find and delete extent tree entry in radix tree */ - down_write(&sbi->extent_tree_lock); - et = radix_tree_lookup(&sbi->extent_tree_root, inode->i_ino); - if (!et) { - up_write(&sbi->extent_tree_lock); - goto out; + if (f2fs_lookup_extent_cache(inode, index, &ei)) { + dn->data_blkaddr = ei.blk + index - ei.fofs; + return 0; } - f2fs_bug_on(sbi, atomic_read(&et->refcount) || et->count); - radix_tree_delete(&sbi->extent_tree_root, inode->i_ino); - kmem_cache_free(extent_tree_slab, et); - sbi->total_ext_tree--; - up_write(&sbi->extent_tree_lock); -out: - trace_f2fs_destroy_extent_tree(inode, node_cnt); - return; -} - -void f2fs_init_extent_cache(struct inode *inode, struct f2fs_extent *i_ext) -{ - if (test_opt(F2FS_I_SB(inode), EXTENT_CACHE)) - f2fs_init_extent_tree(inode, i_ext); - - write_lock(&F2FS_I(inode)->ext_lock); - get_extent_info(&F2FS_I(inode)->ext, *i_ext); - write_unlock(&F2FS_I(inode)->ext_lock); -} - -static bool f2fs_lookup_extent_cache(struct inode *inode, pgoff_t pgofs, - struct extent_info *ei) -{ - if (is_inode_flag_set(F2FS_I(inode), FI_NO_EXTENT)) - return false; - - if (test_opt(F2FS_I_SB(inode), EXTENT_CACHE)) - return f2fs_lookup_extent_tree(inode, pgofs, ei); - return lookup_extent_info(inode, pgofs, ei); + return f2fs_reserve_block(dn, index); } -void f2fs_update_extent_cache(struct dnode_of_data *dn) -{ - struct f2fs_inode_info *fi = F2FS_I(dn->inode); - pgoff_t fofs; - - f2fs_bug_on(F2FS_I_SB(dn->inode), dn->data_blkaddr == NEW_ADDR); - - if (is_inode_flag_set(fi, FI_NO_EXTENT)) - return; - - fofs = start_bidx_of_node(ofs_of_node(dn->node_page), fi) + - dn->ofs_in_node; - - if (test_opt(F2FS_I_SB(dn->inode), EXTENT_CACHE)) - return f2fs_update_extent_tree(dn->inode, fofs, - dn->data_blkaddr); - - if (update_extent_info(dn->inode, fofs, dn->data_blkaddr)) - sync_inode_page(dn); -} - -struct page *find_data_page(struct inode *inode, pgoff_t index, bool sync) +struct page *get_read_data_page(struct inode *inode, pgoff_t index, + int rw, bool for_write) { struct address_space *mapping = inode->i_mapping; struct dnode_of_data dn; @@ -913,23 +284,19 @@ struct page *find_data_page(struct inode *inode, pgoff_t index, bool sync) struct extent_info ei; int err; struct f2fs_io_info fio = { + .sbi = F2FS_I_SB(inode), .type = DATA, - .rw = sync ? READ_SYNC : READA, + .rw = rw, + .encrypted_page = NULL, }; - /* - * If sync is false, it needs to check its block allocation. - * This is need and triggered by two flows: - * gc and truncate_partial_data_page. - */ - if (!sync) - goto search; + if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) + return read_mapping_page(mapping, index, NULL); + + page = f2fs_grab_cache_page(mapping, index, for_write); + if (!page) + return ERR_PTR(-ENOMEM); - page = find_get_page(mapping, index); - if (page && PageUptodate(page)) - return page; - f2fs_put_page(page, 0); -search: if (f2fs_lookup_extent_cache(inode, index, &ei)) { dn.data_blkaddr = ei.blk + index - ei.fofs; goto got_it; @@ -938,37 +305,65 @@ search: set_new_dnode(&dn, inode, NULL, NULL, 0); err = get_dnode_of_data(&dn, index, LOOKUP_NODE); if (err) - return ERR_PTR(err); + goto put_err; f2fs_put_dnode(&dn); - if (dn.data_blkaddr == NULL_ADDR) - return ERR_PTR(-ENOENT); - - /* By fallocate(), there is no cached page, but with NEW_ADDR */ - if (unlikely(dn.data_blkaddr == NEW_ADDR)) - return ERR_PTR(-EINVAL); - + if (unlikely(dn.data_blkaddr == NULL_ADDR)) { + err = -ENOENT; + goto put_err; + } got_it: - page = grab_cache_page(mapping, index); - if (!page) - return ERR_PTR(-ENOMEM); - if (PageUptodate(page)) { unlock_page(page); return page; } + /* + * A new dentry page is allocated but not able to be written, since its + * new inode page couldn't be allocated due to -ENOSPC. + * In such the case, its blkaddr can be remained as NEW_ADDR. + * see, f2fs_add_link -> get_new_data_page -> init_inode_metadata. + */ + if (dn.data_blkaddr == NEW_ADDR) { + zero_user_segment(page, 0, PAGE_CACHE_SIZE); + SetPageUptodate(page); + unlock_page(page); + return page; + } + fio.blk_addr = dn.data_blkaddr; - err = f2fs_submit_page_bio(F2FS_I_SB(inode), page, &fio); + fio.page = page; + err = f2fs_submit_page_bio(&fio); if (err) - return ERR_PTR(err); + goto put_err; + return page; - if (sync) { - wait_on_page_locked(page); - if (unlikely(!PageUptodate(page))) { - f2fs_put_page(page, 0); - return ERR_PTR(-EIO); - } +put_err: + f2fs_put_page(page, 1); + return ERR_PTR(err); +} + +struct page *find_data_page(struct inode *inode, pgoff_t index) +{ + struct address_space *mapping = inode->i_mapping; + struct page *page; + + page = find_get_page(mapping, index); + if (page && PageUptodate(page)) + return page; + f2fs_put_page(page, 0); + + page = get_read_data_page(inode, index, READ_SYNC, false); + if (IS_ERR(page)) + return page; + + if (PageUptodate(page)) + return page; + + wait_on_page_locked(page); + if (unlikely(!PageUptodate(page))) { + f2fs_put_page(page, 0); + return ERR_PTR(-EIO); } return page; } @@ -978,61 +373,17 @@ got_it: * Because, the callers, functions in dir.c and GC, should be able to know * whether this page exists or not. */ -struct page *get_lock_data_page(struct inode *inode, pgoff_t index) +struct page *get_lock_data_page(struct inode *inode, pgoff_t index, + bool for_write) { struct address_space *mapping = inode->i_mapping; - struct dnode_of_data dn; struct page *page; - struct extent_info ei; - int err; - struct f2fs_io_info fio = { - .type = DATA, - .rw = READ_SYNC, - }; repeat: - page = grab_cache_page(mapping, index); - if (!page) - return ERR_PTR(-ENOMEM); - - if (f2fs_lookup_extent_cache(inode, index, &ei)) { - dn.data_blkaddr = ei.blk + index - ei.fofs; - goto got_it; - } - - set_new_dnode(&dn, inode, NULL, NULL, 0); - err = get_dnode_of_data(&dn, index, LOOKUP_NODE); - if (err) { - f2fs_put_page(page, 1); - return ERR_PTR(err); - } - f2fs_put_dnode(&dn); - - if (unlikely(dn.data_blkaddr == NULL_ADDR)) { - f2fs_put_page(page, 1); - return ERR_PTR(-ENOENT); - } - -got_it: - if (PageUptodate(page)) - return page; - - /* - * A new dentry page is allocated but not able to be written, since its - * new inode page couldn't be allocated due to -ENOSPC. - * In such the case, its blkaddr can be remained as NEW_ADDR. - * see, f2fs_add_link -> get_new_data_page -> init_inode_metadata. - */ - if (dn.data_blkaddr == NEW_ADDR) { - zero_user_segment(page, 0, PAGE_CACHE_SIZE); - SetPageUptodate(page); + page = get_read_data_page(inode, index, READ_SYNC, for_write); + if (IS_ERR(page)) return page; - } - - fio.blk_addr = dn.data_blkaddr; - err = f2fs_submit_page_bio(F2FS_I_SB(inode), page, &fio); - if (err) - return ERR_PTR(err); + /* wait for read completion */ lock_page(page); if (unlikely(!PageUptodate(page))) { f2fs_put_page(page, 1); @@ -1051,7 +402,8 @@ got_it: * * Also, caller should grab and release a rwsem by calling f2fs_lock_op() and * f2fs_unlock_op(). - * Note that, ipage is set only by make_empty_dir. + * Note that, ipage is set only by make_empty_dir, and if any error occur, + * ipage should be released by this function. */ struct page *get_new_data_page(struct inode *inode, struct page *ipage, pgoff_t index, bool new_i_size) @@ -1060,57 +412,50 @@ struct page *get_new_data_page(struct inode *inode, struct page *page; struct dnode_of_data dn; int err; +repeat: + page = f2fs_grab_cache_page(mapping, index, true); + if (!page) { + /* + * before exiting, we should make sure ipage will be released + * if any error occur. + */ + f2fs_put_page(ipage, 1); + return ERR_PTR(-ENOMEM); + } set_new_dnode(&dn, inode, ipage, NULL, 0); err = f2fs_reserve_block(&dn, index); - if (err) + if (err) { + f2fs_put_page(page, 1); return ERR_PTR(err); -repeat: - page = grab_cache_page(mapping, index); - if (!page) { - err = -ENOMEM; - goto put_err; } + if (!ipage) + f2fs_put_dnode(&dn); if (PageUptodate(page)) - return page; + goto got_it; if (dn.data_blkaddr == NEW_ADDR) { zero_user_segment(page, 0, PAGE_CACHE_SIZE); SetPageUptodate(page); } else { - struct f2fs_io_info fio = { - .type = DATA, - .rw = READ_SYNC, - .blk_addr = dn.data_blkaddr, - }; - err = f2fs_submit_page_bio(F2FS_I_SB(inode), page, &fio); - if (err) - goto put_err; + f2fs_put_page(page, 1); - lock_page(page); - if (unlikely(!PageUptodate(page))) { - f2fs_put_page(page, 1); - err = -EIO; - goto put_err; - } - if (unlikely(page->mapping != mapping)) { - f2fs_put_page(page, 1); + page = get_read_data_page(inode, index, READ_SYNC, true); + if (IS_ERR(page)) goto repeat; - } - } - if (new_i_size && - i_size_read(inode) < ((index + 1) << PAGE_CACHE_SHIFT)) { - i_size_write(inode, ((index + 1) << PAGE_CACHE_SHIFT)); + /* wait for read completion */ + lock_page(page); + } +got_it: + if (new_i_size && i_size_read(inode) < + ((loff_t)(index + 1) << PAGE_CACHE_SHIFT)) { + i_size_write(inode, ((loff_t)(index + 1) << PAGE_CACHE_SHIFT)); /* Only the directory inode sets new_i_size */ set_inode_flag(F2FS_I(inode), FI_UPDATE_DIR); } return page; - -put_err: - f2fs_put_dnode(&dn); - return ERR_PTR(err); } static int __allocate_data_block(struct dnode_of_data *dn) @@ -1141,15 +486,17 @@ alloc: allocate_data_block(sbi, NULL, dn->data_blkaddr, &dn->data_blkaddr, &sum, seg); - - /* direct IO doesn't use extent cache to maximize the performance */ set_data_blkaddr(dn); /* update i_size */ fofs = start_bidx_of_node(ofs_of_node(dn->node_page), fi) + dn->ofs_in_node; - if (i_size_read(dn->inode) < ((fofs + 1) << PAGE_CACHE_SHIFT)) - i_size_write(dn->inode, ((fofs + 1) << PAGE_CACHE_SHIFT)); + if (i_size_read(dn->inode) < ((loff_t)(fofs + 1) << PAGE_CACHE_SHIFT)) + i_size_write(dn->inode, + ((loff_t)(fofs + 1) << PAGE_CACHE_SHIFT)); + + /* direct IO doesn't use extent cache to maximize the performance */ + f2fs_drop_largest_extent(dn->inode, fofs); return 0; } @@ -1179,6 +526,9 @@ static void __allocate_data_blocks(struct inode *inode, loff_t offset, while (dn.ofs_in_node < end_offset && len) { block_t blkaddr; + if (unlikely(f2fs_cp_error(sbi))) + goto sync_out; + blkaddr = datablock_addr(dn.node_page, dn.ofs_in_node); if (blkaddr == NULL_ADDR || blkaddr == NEW_ADDR) { if (__allocate_data_block(&dn)) @@ -1208,30 +558,36 @@ out: } /* - * get_data_block() now supported readahead/bmap/rw direct_IO with mapped bh. + * f2fs_map_blocks() now supported readahead/bmap/rw direct_IO with + * f2fs_map_blocks structure. * If original data blocks are allocated, then give them to blockdev. * Otherwise, * a. preallocate requested block addresses * b. do not use extent cache for better performance * c. give the block addresses to blockdev */ -static int __get_data_block(struct inode *inode, sector_t iblock, - struct buffer_head *bh_result, int create, bool fiemap) +static int f2fs_map_blocks(struct inode *inode, struct f2fs_map_blocks *map, + int create, int flag) { - unsigned int blkbits = inode->i_sb->s_blocksize_bits; - unsigned maxblocks = bh_result->b_size >> blkbits; + unsigned int maxblocks = map->m_len; struct dnode_of_data dn; + struct f2fs_sb_info *sbi = F2FS_I_SB(inode); int mode = create ? ALLOC_NODE : LOOKUP_NODE_RA; pgoff_t pgofs, end_offset; int err = 0, ofs = 1; struct extent_info ei; bool allocated = false; - /* Get the page offset from the block offset(iblock) */ - pgofs = (pgoff_t)(iblock >> (PAGE_CACHE_SHIFT - blkbits)); + map->m_len = 0; + map->m_flags = 0; + + /* it only supports block size == page size */ + pgofs = (pgoff_t)map->m_lblk; if (f2fs_lookup_extent_cache(inode, pgofs, &ei)) { - f2fs_map_bh(inode->i_sb, pgofs, &ei, bh_result); + map->m_pblk = ei.blk + pgofs - ei.fofs; + map->m_len = min((pgoff_t)maxblocks, ei.fofs + ei.len - pgofs); + map->m_flags = F2FS_MAP_MAPPED; goto out; } @@ -1246,25 +602,40 @@ static int __get_data_block(struct inode *inode, sector_t iblock, err = 0; goto unlock_out; } - if (dn.data_blkaddr == NEW_ADDR && !fiemap) - goto put_out; - - if (dn.data_blkaddr != NULL_ADDR) { - clear_buffer_new(bh_result); - map_bh(bh_result, inode->i_sb, dn.data_blkaddr); - } else if (create) { - err = __allocate_data_block(&dn); - if (err) - goto put_out; - allocated = true; - set_buffer_new(bh_result); - map_bh(bh_result, inode->i_sb, dn.data_blkaddr); - } else { - goto put_out; + + if (dn.data_blkaddr == NEW_ADDR || dn.data_blkaddr == NULL_ADDR) { + if (create) { + if (unlikely(f2fs_cp_error(sbi))) { + err = -EIO; + goto put_out; + } + err = __allocate_data_block(&dn); + if (err) + goto put_out; + allocated = true; + map->m_flags = F2FS_MAP_NEW; + } else { + if (flag != F2FS_GET_BLOCK_FIEMAP || + dn.data_blkaddr != NEW_ADDR) { + if (flag == F2FS_GET_BLOCK_BMAP) + err = -ENOENT; + goto put_out; + } + + /* + * preallocated unwritten block should be mapped + * for fiemap. + */ + if (dn.data_blkaddr == NEW_ADDR) + map->m_flags = F2FS_MAP_UNWRITTEN; + } } + map->m_flags |= F2FS_MAP_MAPPED; + map->m_pblk = dn.data_blkaddr; + map->m_len = 1; + end_offset = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode)); - bh_result->b_size = (((size_t)1) << blkbits); dn.ofs_in_node++; pgofs++; @@ -1282,28 +653,45 @@ get_next: err = 0; goto unlock_out; } - if (dn.data_blkaddr == NEW_ADDR && !fiemap) - goto put_out; end_offset = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode)); } - if (maxblocks > (bh_result->b_size >> blkbits)) { + if (maxblocks > map->m_len) { block_t blkaddr = datablock_addr(dn.node_page, dn.ofs_in_node); - if (blkaddr == NULL_ADDR && create) { - err = __allocate_data_block(&dn); - if (err) - goto sync_out; - allocated = true; - set_buffer_new(bh_result); - blkaddr = dn.data_blkaddr; + + if (blkaddr == NEW_ADDR || blkaddr == NULL_ADDR) { + if (create) { + if (unlikely(f2fs_cp_error(sbi))) { + err = -EIO; + goto sync_out; + } + err = __allocate_data_block(&dn); + if (err) + goto sync_out; + allocated = true; + map->m_flags |= F2FS_MAP_NEW; + blkaddr = dn.data_blkaddr; + } else { + /* + * we only merge preallocated unwritten blocks + * for fiemap. + */ + if (flag != F2FS_GET_BLOCK_FIEMAP || + blkaddr != NEW_ADDR) + goto sync_out; + } } + /* Give more consecutive addresses for the readahead */ - if (blkaddr == (bh_result->b_blocknr + ofs)) { + if ((map->m_pblk != NEW_ADDR && + blkaddr == (map->m_pblk + ofs)) || + (map->m_pblk == NEW_ADDR && + blkaddr == NEW_ADDR)) { ofs++; dn.ofs_in_node++; pgofs++; - bh_result->b_size += (((size_t)1) << blkbits); + map->m_len++; goto get_next; } } @@ -1316,27 +704,311 @@ unlock_out: if (create) f2fs_unlock_op(F2FS_I_SB(inode)); out: - trace_f2fs_get_data_block(inode, iblock, bh_result, err); + trace_f2fs_map_blocks(inode, map, err); return err; } +static int __get_data_block(struct inode *inode, sector_t iblock, + struct buffer_head *bh, int create, int flag) +{ + struct f2fs_map_blocks map; + int ret; + + map.m_lblk = iblock; + map.m_len = bh->b_size >> inode->i_blkbits; + + ret = f2fs_map_blocks(inode, &map, create, flag); + if (!ret) { + map_bh(bh, inode->i_sb, map.m_pblk); + bh->b_state = (bh->b_state & ~F2FS_MAP_FLAGS) | map.m_flags; + bh->b_size = map.m_len << inode->i_blkbits; + } + return ret; +} + static int get_data_block(struct inode *inode, sector_t iblock, + struct buffer_head *bh_result, int create, int flag) +{ + return __get_data_block(inode, iblock, bh_result, create, flag); +} + +static int get_data_block_dio(struct inode *inode, sector_t iblock, struct buffer_head *bh_result, int create) { - return __get_data_block(inode, iblock, bh_result, create, false); + return __get_data_block(inode, iblock, bh_result, create, + F2FS_GET_BLOCK_DIO); } -static int get_data_block_fiemap(struct inode *inode, sector_t iblock, +static int get_data_block_bmap(struct inode *inode, sector_t iblock, struct buffer_head *bh_result, int create) { - return __get_data_block(inode, iblock, bh_result, create, true); + return __get_data_block(inode, iblock, bh_result, create, + F2FS_GET_BLOCK_BMAP); +} + +static inline sector_t logical_to_blk(struct inode *inode, loff_t offset) +{ + return (offset >> inode->i_blkbits); +} + +static inline loff_t blk_to_logical(struct inode *inode, sector_t blk) +{ + return (blk << inode->i_blkbits); } int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, u64 start, u64 len) { - return generic_block_fiemap(inode, fieinfo, - start, len, get_data_block_fiemap); + struct buffer_head map_bh; + sector_t start_blk, last_blk; + loff_t isize = i_size_read(inode); + u64 logical = 0, phys = 0, size = 0; + u32 flags = 0; + bool past_eof = false, whole_file = false; + int ret = 0; + + ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC); + if (ret) + return ret; + + if (f2fs_has_inline_data(inode)) { + ret = f2fs_inline_data_fiemap(inode, fieinfo, start, len); + if (ret != -EAGAIN) + return ret; + } + + mutex_lock(&inode->i_mutex); + + if (len >= isize) { + whole_file = true; + len = isize; + } + + if (logical_to_blk(inode, len) == 0) + len = blk_to_logical(inode, 1); + + start_blk = logical_to_blk(inode, start); + last_blk = logical_to_blk(inode, start + len - 1); +next: + memset(&map_bh, 0, sizeof(struct buffer_head)); + map_bh.b_size = len; + + ret = get_data_block(inode, start_blk, &map_bh, 0, + F2FS_GET_BLOCK_FIEMAP); + if (ret) + goto out; + + /* HOLE */ + if (!buffer_mapped(&map_bh)) { + start_blk++; + + if (!past_eof && blk_to_logical(inode, start_blk) >= isize) + past_eof = 1; + + if (past_eof && size) { + flags |= FIEMAP_EXTENT_LAST; + ret = fiemap_fill_next_extent(fieinfo, logical, + phys, size, flags); + } else if (size) { + ret = fiemap_fill_next_extent(fieinfo, logical, + phys, size, flags); + size = 0; + } + + /* if we have holes up to/past EOF then we're done */ + if (start_blk > last_blk || past_eof || ret) + goto out; + } else { + if (start_blk > last_blk && !whole_file) { + ret = fiemap_fill_next_extent(fieinfo, logical, + phys, size, flags); + goto out; + } + + /* + * if size != 0 then we know we already have an extent + * to add, so add it. + */ + if (size) { + ret = fiemap_fill_next_extent(fieinfo, logical, + phys, size, flags); + if (ret) + goto out; + } + + logical = blk_to_logical(inode, start_blk); + phys = blk_to_logical(inode, map_bh.b_blocknr); + size = map_bh.b_size; + flags = 0; + if (buffer_unwritten(&map_bh)) + flags = FIEMAP_EXTENT_UNWRITTEN; + + start_blk += logical_to_blk(inode, size); + + /* + * If we are past the EOF, then we need to make sure as + * soon as we find a hole that the last extent we found + * is marked with FIEMAP_EXTENT_LAST + */ + if (!past_eof && logical + size >= isize) + past_eof = true; + } + cond_resched(); + if (fatal_signal_pending(current)) + ret = -EINTR; + else + goto next; +out: + if (ret == 1) + ret = 0; + + mutex_unlock(&inode->i_mutex); + return ret; +} + +/* + * This function was originally taken from fs/mpage.c, and customized for f2fs. + * Major change was from block_size == page_size in f2fs by default. + */ +static int f2fs_mpage_readpages(struct address_space *mapping, + struct list_head *pages, struct page *page, + unsigned nr_pages) +{ + struct bio *bio = NULL; + unsigned page_idx; + sector_t last_block_in_bio = 0; + struct inode *inode = mapping->host; + const unsigned blkbits = inode->i_blkbits; + const unsigned blocksize = 1 << blkbits; + sector_t block_in_file; + sector_t last_block; + sector_t last_block_in_file; + sector_t block_nr; + struct block_device *bdev = inode->i_sb->s_bdev; + struct f2fs_map_blocks map; + + map.m_pblk = 0; + map.m_lblk = 0; + map.m_len = 0; + map.m_flags = 0; + + for (page_idx = 0; nr_pages; page_idx++, nr_pages--) { + + prefetchw(&page->flags); + if (pages) { + page = list_entry(pages->prev, struct page, lru); + list_del(&page->lru); + if (add_to_page_cache_lru(page, mapping, + page->index, GFP_KERNEL)) + goto next_page; + } + + block_in_file = (sector_t)page->index; + last_block = block_in_file + nr_pages; + last_block_in_file = (i_size_read(inode) + blocksize - 1) >> + blkbits; + if (last_block > last_block_in_file) + last_block = last_block_in_file; + + /* + * Map blocks using the previous result first. + */ + if ((map.m_flags & F2FS_MAP_MAPPED) && + block_in_file > map.m_lblk && + block_in_file < (map.m_lblk + map.m_len)) + goto got_it; + + /* + * Then do more f2fs_map_blocks() calls until we are + * done with this page. + */ + map.m_flags = 0; + + if (block_in_file < last_block) { + map.m_lblk = block_in_file; + map.m_len = last_block - block_in_file; + + if (f2fs_map_blocks(inode, &map, 0, + F2FS_GET_BLOCK_READ)) + goto set_error_page; + } +got_it: + if ((map.m_flags & F2FS_MAP_MAPPED)) { + block_nr = map.m_pblk + block_in_file - map.m_lblk; + SetPageMappedToDisk(page); + + if (!PageUptodate(page) && !cleancache_get_page(page)) { + SetPageUptodate(page); + goto confused; + } + } else { + zero_user_segment(page, 0, PAGE_CACHE_SIZE); + SetPageUptodate(page); + unlock_page(page); + goto next_page; + } + + /* + * This page will go to BIO. Do we need to send this + * BIO off first? + */ + if (bio && (last_block_in_bio != block_nr - 1)) { +submit_and_realloc: + submit_bio(READ, bio); + bio = NULL; + } + if (bio == NULL) { + struct f2fs_crypto_ctx *ctx = NULL; + + if (f2fs_encrypted_inode(inode) && + S_ISREG(inode->i_mode)) { + + ctx = f2fs_get_crypto_ctx(inode); + if (IS_ERR(ctx)) + goto set_error_page; + + /* wait the page to be moved by cleaning */ + f2fs_wait_on_encrypted_page_writeback( + F2FS_I_SB(inode), block_nr); + } + + bio = bio_alloc(GFP_KERNEL, + min_t(int, nr_pages, BIO_MAX_PAGES)); + if (!bio) { + if (ctx) + f2fs_release_crypto_ctx(ctx); + goto set_error_page; + } + bio->bi_bdev = bdev; + bio->bi_iter.bi_sector = SECTOR_FROM_BLOCK(block_nr); + bio->bi_end_io = f2fs_read_end_io; + bio->bi_private = ctx; + } + + if (bio_add_page(bio, page, blocksize, 0) < blocksize) + goto submit_and_realloc; + + last_block_in_bio = block_nr; + goto next_page; +set_error_page: + SetPageError(page); + zero_user_segment(page, 0, PAGE_CACHE_SIZE); + unlock_page(page); + goto next_page; +confused: + if (bio) { + submit_bio(READ, bio); + bio = NULL; + } + unlock_page(page); +next_page: + if (pages) + page_cache_release(page); + } + BUG_ON(pages && !list_empty(pages)); + if (bio) + submit_bio(READ, bio); + return 0; } static int f2fs_read_data_page(struct file *file, struct page *page) @@ -1350,8 +1022,7 @@ static int f2fs_read_data_page(struct file *file, struct page *page) if (f2fs_has_inline_data(inode)) ret = f2fs_read_inline_data(inode, page); if (ret == -EAGAIN) - ret = mpage_readpage(page, get_data_block); - + ret = f2fs_mpage_readpages(page->mapping, NULL, page, 1); return ret; } @@ -1360,16 +1031,20 @@ static int f2fs_read_data_pages(struct file *file, struct list_head *pages, unsigned nr_pages) { struct inode *inode = file->f_mapping->host; + struct page *page = list_entry(pages->prev, struct page, lru); + + trace_f2fs_readpages(inode, page, nr_pages); /* If the file has inline data, skip readpages */ if (f2fs_has_inline_data(inode)) return 0; - return mpage_readpages(mapping, pages, nr_pages, get_data_block); + return f2fs_mpage_readpages(mapping, pages, NULL, nr_pages); } -int do_write_data_page(struct page *page, struct f2fs_io_info *fio) +int do_write_data_page(struct f2fs_io_info *fio) { + struct page *page = fio->page; struct inode *inode = page->mapping->host; struct dnode_of_data dn; int err = 0; @@ -1387,6 +1062,19 @@ int do_write_data_page(struct page *page, struct f2fs_io_info *fio) goto out_writepage; } + if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) { + + /* wait for GCed encrypted page writeback */ + f2fs_wait_on_encrypted_page_writeback(F2FS_I_SB(inode), + fio->blk_addr); + + fio->encrypted_page = f2fs_encrypt(inode, fio->page); + if (IS_ERR(fio->encrypted_page)) { + err = PTR_ERR(fio->encrypted_page); + goto out_writepage; + } + } + set_page_writeback(page); /* @@ -1396,11 +1084,11 @@ int do_write_data_page(struct page *page, struct f2fs_io_info *fio) if (unlikely(fio->blk_addr != NEW_ADDR && !is_cold_data(page) && need_inplace_update(inode))) { - rewrite_data_page(page, fio); + rewrite_data_page(fio); set_inode_flag(F2FS_I(inode), FI_UPDATE_WRITE); trace_f2fs_do_write_data_page(page, IPU); } else { - write_data_page(page, &dn, fio); + write_data_page(&dn, fio); set_data_blkaddr(&dn); f2fs_update_extent_cache(&dn); trace_f2fs_do_write_data_page(page, OPU); @@ -1425,8 +1113,11 @@ static int f2fs_write_data_page(struct page *page, bool need_balance_fs = false; int err = 0; struct f2fs_io_info fio = { + .sbi = sbi, .type = DATA, .rw = (wbc->sync_mode == WB_SYNC_ALL) ? WRITE_SYNC : WRITE, + .page = page, + .encrypted_page = NULL, }; trace_f2fs_writepage(page, DATA); @@ -1456,7 +1147,7 @@ write: if (S_ISDIR(inode->i_mode)) { if (unlikely(f2fs_cp_error(sbi))) goto redirty_out; - err = do_write_data_page(page, &fio); + err = do_write_data_page(&fio); goto done; } @@ -1476,7 +1167,7 @@ write: if (f2fs_has_inline_data(inode)) err = f2fs_write_inline_data(inode, page); if (err == -EAGAIN) - err = do_write_data_page(page, &fio); + err = do_write_data_page(&fio); f2fs_unlock_op(sbi); done: if (err && err != -ENOENT) @@ -1508,6 +1199,137 @@ static int __f2fs_writepage(struct page *page, struct writeback_control *wbc, return ret; } +/* + * This function was copied from write_cche_pages from mm/page-writeback.c. + * The major change is making write step of cold data page separately from + * warm/hot data page. + */ +static int f2fs_write_cache_pages(struct address_space *mapping, + struct writeback_control *wbc, writepage_t writepage, + void *data) +{ + int ret = 0; + int done = 0; + struct pagevec pvec; + int nr_pages; + pgoff_t uninitialized_var(writeback_index); + pgoff_t index; + pgoff_t end; /* Inclusive */ + pgoff_t done_index; + int cycled; + int range_whole = 0; + int tag; + int step = 0; + + pagevec_init(&pvec, 0); +next: + if (wbc->range_cyclic) { + writeback_index = mapping->writeback_index; /* prev offset */ + index = writeback_index; + if (index == 0) + cycled = 1; + else + cycled = 0; + end = -1; + } else { + index = wbc->range_start >> PAGE_CACHE_SHIFT; + end = wbc->range_end >> PAGE_CACHE_SHIFT; + if (wbc->range_start == 0 && wbc->range_end == LLONG_MAX) + range_whole = 1; + cycled = 1; /* ignore range_cyclic tests */ + } + if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages) + tag = PAGECACHE_TAG_TOWRITE; + else + tag = PAGECACHE_TAG_DIRTY; +retry: + if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages) + tag_pages_for_writeback(mapping, index, end); + done_index = index; + while (!done && (index <= end)) { + int i; + + nr_pages = pagevec_lookup_tag(&pvec, mapping, &index, tag, + min(end - index, (pgoff_t)PAGEVEC_SIZE - 1) + 1); + if (nr_pages == 0) + break; + + for (i = 0; i < nr_pages; i++) { + struct page *page = pvec.pages[i]; + + if (page->index > end) { + done = 1; + break; + } + + done_index = page->index; + + lock_page(page); + + if (unlikely(page->mapping != mapping)) { +continue_unlock: + unlock_page(page); + continue; + } + + if (!PageDirty(page)) { + /* someone wrote it for us */ + goto continue_unlock; + } + + if (step == is_cold_data(page)) + goto continue_unlock; + + if (PageWriteback(page)) { + if (wbc->sync_mode != WB_SYNC_NONE) + f2fs_wait_on_page_writeback(page, DATA); + else + goto continue_unlock; + } + + BUG_ON(PageWriteback(page)); + if (!clear_page_dirty_for_io(page)) + goto continue_unlock; + + ret = (*writepage)(page, wbc, data); + if (unlikely(ret)) { + if (ret == AOP_WRITEPAGE_ACTIVATE) { + unlock_page(page); + ret = 0; + } else { + done_index = page->index + 1; + done = 1; + break; + } + } + + if (--wbc->nr_to_write <= 0 && + wbc->sync_mode == WB_SYNC_NONE) { + done = 1; + break; + } + } + pagevec_release(&pvec); + cond_resched(); + } + + if (step < 1) { + step++; + goto next; + } + + if (!cycled && !done) { + cycled = 1; + index = 0; + end = writeback_index - 1; + goto retry; + } + if (wbc->range_cyclic || (range_whole && wbc->nr_to_write > 0)) + mapping->writeback_index = done_index; + + return ret; +} + static int f2fs_write_data_pages(struct address_space *mapping, struct writeback_control *wbc) { @@ -1523,6 +1345,10 @@ static int f2fs_write_data_pages(struct address_space *mapping, if (!mapping->a_ops->writepage) return 0; + /* skip writing if there is no dirty page in this inode */ + if (!get_dirty_pages(inode) && wbc->sync_mode == WB_SYNC_NONE) + return 0; + if (S_ISDIR(inode->i_mode) && wbc->sync_mode == WB_SYNC_NONE && get_dirty_pages(inode) < nr_pages_to_skip(sbi, DATA) && available_free_memory(sbi, DIRTY_DENTS)) @@ -1538,12 +1364,11 @@ static int f2fs_write_data_pages(struct address_space *mapping, mutex_lock(&sbi->writepages); locked = true; } - ret = write_cache_pages(mapping, wbc, __f2fs_writepage, mapping); + ret = f2fs_write_cache_pages(mapping, wbc, __f2fs_writepage, mapping); + f2fs_submit_merged_bio(sbi, DATA, WRITE); if (locked) mutex_unlock(&sbi->writepages); - f2fs_submit_merged_bio(sbi, DATA, WRITE); - remove_dirty_dir_inode(inode); wbc->nr_to_write = max((long)0, wbc->nr_to_write - diff); @@ -1570,7 +1395,8 @@ static int f2fs_write_begin(struct file *file, struct address_space *mapping, { struct inode *inode = mapping->host; struct f2fs_sb_info *sbi = F2FS_I_SB(inode); - struct page *page, *ipage; + struct page *page = NULL; + struct page *ipage; pgoff_t index = ((unsigned long long) pos) >> PAGE_CACHE_SHIFT; struct dnode_of_data dn; int err = 0; @@ -1620,42 +1446,51 @@ repeat: if (err) goto put_fail; } - err = f2fs_reserve_block(&dn, index); + + err = f2fs_get_block(&dn, index); if (err) goto put_fail; put_next: f2fs_put_dnode(&dn); f2fs_unlock_op(sbi); - if ((len == PAGE_CACHE_SIZE) || PageUptodate(page)) - return 0; - f2fs_wait_on_page_writeback(page, DATA); + /* wait for GCed encrypted page writeback */ + if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) + f2fs_wait_on_encrypted_page_writeback(sbi, dn.data_blkaddr); + + if (len == PAGE_CACHE_SIZE) + goto out_update; + if (PageUptodate(page)) + goto out_clear; + if ((pos & PAGE_CACHE_MASK) >= i_size_read(inode)) { unsigned start = pos & (PAGE_CACHE_SIZE - 1); unsigned end = start + len; /* Reading beyond i_size is simple: memset to zero */ zero_user_segments(page, 0, start, end, PAGE_CACHE_SIZE); - goto out; + goto out_update; } if (dn.data_blkaddr == NEW_ADDR) { zero_user_segment(page, 0, PAGE_CACHE_SIZE); } else { struct f2fs_io_info fio = { + .sbi = sbi, .type = DATA, .rw = READ_SYNC, .blk_addr = dn.data_blkaddr, + .page = page, + .encrypted_page = NULL, }; - err = f2fs_submit_page_bio(sbi, page, &fio); + err = f2fs_submit_page_bio(&fio); if (err) goto fail; lock_page(page); if (unlikely(!PageUptodate(page))) { - f2fs_put_page(page, 1); err = -EIO; goto fail; } @@ -1663,9 +1498,17 @@ put_next: f2fs_put_page(page, 1); goto repeat; } + + /* avoid symlink page */ + if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) { + err = f2fs_decrypt_one(inode, page); + if (err) + goto fail; + } } -out: +out_update: SetPageUptodate(page); +out_clear: clear_cold_data(page); return 0; @@ -1673,8 +1516,8 @@ put_fail: f2fs_put_dnode(&dn); unlock_fail: f2fs_unlock_op(sbi); - f2fs_put_page(page, 1); fail: + f2fs_put_page(page, 1); f2fs_write_failed(mapping, pos + len); return err; } @@ -1705,9 +1548,6 @@ static int check_direct_IO(struct inode *inode, struct iov_iter *iter, { unsigned blocksize_mask = inode->i_sb->s_blocksize - 1; - if (iov_iter_rw(iter) == READ) - return 0; - if (offset & blocksize_mask) return -EINVAL; @@ -1733,15 +1573,25 @@ static ssize_t f2fs_direct_IO(struct kiocb *iocb, struct iov_iter *iter, return err; } - if (check_direct_IO(inode, iter, offset)) + if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) return 0; + err = check_direct_IO(inode, iter, offset); + if (err) + return err; + trace_f2fs_direct_IO_enter(inode, offset, count, iov_iter_rw(iter)); - if (iov_iter_rw(iter) == WRITE) + if (iov_iter_rw(iter) == WRITE) { __allocate_data_blocks(inode, offset, count); + if (unlikely(f2fs_cp_error(F2FS_I_SB(inode)))) { + err = -EIO; + goto out; + } + } - err = blockdev_direct_IO(iocb, inode, iter, offset, get_data_block); + err = blockdev_direct_IO(iocb, inode, iter, offset, get_data_block_dio); +out: if (err < 0 && iov_iter_rw(iter) == WRITE) f2fs_write_failed(mapping, offset + count); @@ -1768,6 +1618,11 @@ void f2fs_invalidate_page(struct page *page, unsigned int offset, else inode_dec_dirty_pages(inode); } + + /* This is atomic written page, keep Private */ + if (IS_ATOMIC_WRITTEN_PAGE(page)) + return; + ClearPagePrivate(page); } @@ -1777,6 +1632,10 @@ int f2fs_release_page(struct page *page, gfp_t wait) if (PageDirty(page)) return 0; + /* This is atomic written page, keep Private */ + if (IS_ATOMIC_WRITTEN_PAGE(page)) + return 0; + ClearPagePrivate(page); return 1; } @@ -1791,12 +1650,17 @@ static int f2fs_set_data_page_dirty(struct page *page) SetPageUptodate(page); if (f2fs_is_atomic_file(inode)) { - register_inmem_page(inode, page); - return 1; + if (!IS_ATOMIC_WRITTEN_PAGE(page)) { + register_inmem_page(inode, page); + return 1; + } + /* + * Previously, this page has been registered, we just + * return here. + */ + return 0; } - mark_inode_dirty(inode); - if (!PageDirty(page)) { __set_page_dirty_nobuffers(page); update_dirty_page(inode, page); @@ -1809,44 +1673,14 @@ static sector_t f2fs_bmap(struct address_space *mapping, sector_t block) { struct inode *inode = mapping->host; - /* we don't need to use inline_data strictly */ - if (f2fs_has_inline_data(inode)) { - int err = f2fs_convert_inline_inode(inode); - if (err) - return err; - } - return generic_block_bmap(mapping, block, get_data_block); -} - -void init_extent_cache_info(struct f2fs_sb_info *sbi) -{ - INIT_RADIX_TREE(&sbi->extent_tree_root, GFP_NOIO); - init_rwsem(&sbi->extent_tree_lock); - INIT_LIST_HEAD(&sbi->extent_list); - spin_lock_init(&sbi->extent_lock); - sbi->total_ext_tree = 0; - atomic_set(&sbi->total_ext_node, 0); -} + if (f2fs_has_inline_data(inode)) + return 0; -int __init create_extent_cache(void) -{ - extent_tree_slab = f2fs_kmem_cache_create("f2fs_extent_tree", - sizeof(struct extent_tree)); - if (!extent_tree_slab) - return -ENOMEM; - extent_node_slab = f2fs_kmem_cache_create("f2fs_extent_node", - sizeof(struct extent_node)); - if (!extent_node_slab) { - kmem_cache_destroy(extent_tree_slab); - return -ENOMEM; - } - return 0; -} + /* make sure allocating whole blocks */ + if (mapping_tagged(mapping, PAGECACHE_TAG_DIRTY)) + filemap_write_and_wait(mapping); -void destroy_extent_cache(void) -{ - kmem_cache_destroy(extent_node_slab); - kmem_cache_destroy(extent_tree_slab); + return generic_block_bmap(mapping, block, get_data_block_bmap); } const struct address_space_operations f2fs_dblock_aops = { |