diff options
Diffstat (limited to 'fs/btrfs/inode.c')
| -rw-r--r-- | fs/btrfs/inode.c | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 8dba152883d3..0182f081d499 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -6557,6 +6557,7 @@ noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len, int ret; struct extent_buffer *leaf; struct btrfs_root *root = BTRFS_I(inode)->root; + struct extent_io_tree *io_tree = &BTRFS_I(inode)->io_tree; struct btrfs_file_extent_item *fi; struct btrfs_key key; u64 disk_bytenr; @@ -6633,6 +6634,20 @@ noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len, if (btrfs_extent_readonly(root, disk_bytenr)) goto out; + + num_bytes = min(offset + *len, extent_end) - offset; + if (!nocow && found_type == BTRFS_FILE_EXTENT_PREALLOC) { + u64 range_end; + + range_end = round_up(offset + num_bytes, root->sectorsize) - 1; + ret = test_range_bit(io_tree, offset, range_end, + EXTENT_DELALLOC, 0, NULL); + if (ret) { + ret = -EAGAIN; + goto out; + } + } + btrfs_release_path(path); /* @@ -6661,7 +6676,6 @@ noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len, */ disk_bytenr += backref_offset; disk_bytenr += offset - key.offset; - num_bytes = min(offset + *len, extent_end) - offset; if (csum_exist_in_range(root, disk_bytenr, num_bytes)) goto out; /* |