diff options
| -rw-r--r-- | fs/btrfs/file.c | 2 | ||||
| -rw-r--r-- | fs/btrfs/inode.c | 37 | ||||
| -rw-r--r-- | fs/btrfs/ordered-data.c | 48 | ||||
| -rw-r--r-- | fs/btrfs/ordered-data.h | 1 |
4 files changed, 69 insertions, 19 deletions
diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c index d6505892cd52..3e4e5c227c0c 100644 --- a/fs/btrfs/file.c +++ b/fs/btrfs/file.c @@ -251,7 +251,7 @@ static int noinline dirty_and_release_pages(struct btrfs_trans_handle *trans, end_of_last_block = start_pos + num_bytes - 1; lock_extent(io_tree, start_pos, end_of_last_block, GFP_NOFS); - trans = btrfs_join_transaction(root, 1); + trans = btrfs_start_transaction(root, 1); if (!trans) { err = -ENOMEM; goto out_unlock; diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 0a687326c0b0..293355c92a4f 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -382,7 +382,7 @@ mapit: return btrfs_map_bio(root, rw, bio, mirror_num, 0); } -static int add_pending_csums(struct btrfs_trans_handle *trans, +static noinline int add_pending_csums(struct btrfs_trans_handle *trans, struct inode *inode, u64 file_offset, struct list_head *list) { @@ -390,15 +390,12 @@ static int add_pending_csums(struct btrfs_trans_handle *trans, struct btrfs_ordered_sum *sum; btrfs_set_trans_block_group(trans, inode); - while(!list_empty(list)) { - cur = list->next; + list_for_each(cur, list) { sum = list_entry(cur, struct btrfs_ordered_sum, list); mutex_lock(&BTRFS_I(inode)->csum_mutex); btrfs_csum_file_blocks(trans, BTRFS_I(inode)->root, inode, sum); mutex_unlock(&BTRFS_I(inode)->csum_mutex); - list_del(&sum->list); - kfree(sum); } return 0; } @@ -498,9 +495,8 @@ int btrfs_writepage_end_io_hook(struct page *page, u64 start, u64 end, int ret; ret = btrfs_dec_test_ordered_pending(inode, start, end - start + 1); - if (!ret) { + if (!ret) return 0; - } trans = btrfs_join_transaction(root, 1); @@ -571,6 +567,18 @@ int btrfs_readpage_io_hook(struct page *page, u64 start, u64 end) path = btrfs_alloc_path(); item = btrfs_lookup_csum(NULL, root, path, inode->i_ino, start, 0); if (IS_ERR(item)) { + /* + * It is possible there is an ordered extent that has + * not yet finished for this range in the file. If so, + * that extent will have a csum cached, and it will insert + * the sum after all the blocks in the extent are fully + * on disk. So, look for an ordered extent and use the + * sum if found. + */ + ret = btrfs_find_ordered_sum(inode, start, &csum); + if (ret == 0) + goto found; + ret = PTR_ERR(item); /* a csum that isn't present is a preallocated region. */ if (ret == -ENOENT || ret == -EFBIG) @@ -582,6 +590,7 @@ int btrfs_readpage_io_hook(struct page *page, u64 start, u64 end) } read_extent_buffer(path->nodes[0], &csum, (unsigned long)item, BTRFS_CRC32_SIZE); +found: set_state_private(io_tree, start, csum); out: if (path) @@ -888,7 +897,7 @@ static void fill_inode_item(struct extent_buffer *leaf, BTRFS_I(inode)->block_group->key.objectid); } -int btrfs_update_inode(struct btrfs_trans_handle *trans, +int noinline btrfs_update_inode(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct inode *inode) { @@ -1567,6 +1576,7 @@ static int btrfs_init_locked_inode(struct inode *inode, void *p) inode->i_mapping, GFP_NOFS); extent_io_tree_init(&BTRFS_I(inode)->io_failure_tree, inode->i_mapping, GFP_NOFS); + btrfs_ordered_inode_tree_init(&BTRFS_I(inode)->ordered_tree); mutex_init(&BTRFS_I(inode)->csum_mutex); return 0; } @@ -1868,6 +1878,7 @@ static struct inode *btrfs_new_inode(struct btrfs_trans_handle *trans, inode->i_mapping, GFP_NOFS); extent_io_tree_init(&BTRFS_I(inode)->io_failure_tree, inode->i_mapping, GFP_NOFS); + btrfs_ordered_inode_tree_init(&BTRFS_I(inode)->ordered_tree); mutex_init(&BTRFS_I(inode)->csum_mutex); BTRFS_I(inode)->delalloc_bytes = 0; BTRFS_I(inode)->disk_i_size = 0; @@ -2097,6 +2108,7 @@ static int btrfs_create(struct inode *dir, struct dentry *dentry, BTRFS_I(inode)->delalloc_bytes = 0; BTRFS_I(inode)->disk_i_size = 0; BTRFS_I(inode)->io_tree.ops = &btrfs_extent_io_ops; + btrfs_ordered_inode_tree_init(&BTRFS_I(inode)->ordered_tree); } dir->i_sb->s_dirt = 1; btrfs_update_inode_block_group(trans, inode); @@ -2618,14 +2630,6 @@ static int __btrfs_releasepage(struct page *page, gfp_t gfp_flags) static int btrfs_releasepage(struct page *page, gfp_t gfp_flags) { - struct btrfs_ordered_extent *ordered; - - ordered = btrfs_lookup_ordered_extent(page->mapping->host, - page_offset(page)); - if (ordered) { - btrfs_put_ordered_extent(ordered); - return 0; - } return __btrfs_releasepage(page, gfp_flags); } @@ -3078,6 +3082,7 @@ static int btrfs_symlink(struct inode *dir, struct dentry *dentry, BTRFS_I(inode)->delalloc_bytes = 0; BTRFS_I(inode)->disk_i_size = 0; BTRFS_I(inode)->io_tree.ops = &btrfs_extent_io_ops; + btrfs_ordered_inode_tree_init(&BTRFS_I(inode)->ordered_tree); } dir->i_sb->s_dirt = 1; btrfs_update_inode_block_group(trans, inode); diff --git a/fs/btrfs/ordered-data.c b/fs/btrfs/ordered-data.c index d86a953ae51d..b739e3abebb9 100644 --- a/fs/btrfs/ordered-data.c +++ b/fs/btrfs/ordered-data.c @@ -245,8 +245,18 @@ out: int btrfs_put_ordered_extent(struct btrfs_ordered_extent *entry) { - if (atomic_dec_and_test(&entry->refs)) + struct list_head *cur; + struct btrfs_ordered_sum *sum; + + if (atomic_dec_and_test(&entry->refs)) { + while(!list_empty(&entry->list)) { + cur = entry->list.next; + sum = list_entry(cur, struct btrfs_ordered_sum, list); + list_del(&sum->list); + kfree(sum); + } kfree(entry); + } return 0; } @@ -444,8 +454,9 @@ int btrfs_ordered_update_i_size(struct inode *inode, * if we find an ordered extent then we can't update disk i_size * yet */ + node = &ordered->rb_node; while(1) { - node = rb_prev(&ordered->rb_node); + node = rb_prev(node); if (!node) break; test = rb_entry(node, struct btrfs_ordered_extent, rb_node); @@ -495,3 +506,36 @@ out: mutex_unlock(&tree->mutex); return 0; } + +int btrfs_find_ordered_sum(struct inode *inode, u64 offset, u32 *sum) +{ + struct btrfs_ordered_sum *ordered_sum; + struct btrfs_sector_sum *sector_sums; + struct btrfs_ordered_extent *ordered; + struct btrfs_ordered_inode_tree *tree = &BTRFS_I(inode)->ordered_tree; + struct list_head *cur; + int ret = 1; + int index; + + ordered = btrfs_lookup_ordered_extent(inode, offset); + if (!ordered) + return 1; + + mutex_lock(&tree->mutex); + list_for_each_prev(cur, &ordered->list) { + ordered_sum = list_entry(cur, struct btrfs_ordered_sum, list); + if (offset >= ordered_sum->file_offset && + offset < ordered_sum->file_offset + ordered_sum->len) { + index = (offset - ordered_sum->file_offset) / + BTRFS_I(inode)->root->sectorsize;; + sector_sums = &ordered_sum->sums; + *sum = sector_sums[index].sum; + ret = 0; + goto out; + } + } +out: + mutex_unlock(&tree->mutex); + return ret; +} + diff --git a/fs/btrfs/ordered-data.h b/fs/btrfs/ordered-data.h index 40e9126ad954..33f0d9e91b11 100644 --- a/fs/btrfs/ordered-data.h +++ b/fs/btrfs/ordered-data.h @@ -91,4 +91,5 @@ int btrfs_add_ordered_pending(struct inode *inode, u64 start, u64 len); int btrfs_ordered_update_i_size(struct inode *inode, struct btrfs_ordered_extent *ordered); +int btrfs_find_ordered_sum(struct inode *inode, u64 offset, u32 *sum); #endif |