diff options
| -rw-r--r-- | fs/btrfs/file.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c index 31e48b9..fc2d21b 100644 --- a/fs/btrfs/file.c +++ b/fs/btrfs/file.c @@ -1411,7 +1411,7 @@ static noinline int check_can_nocow(struct inode *inode, loff_t pos, int ret; lockstart = round_down(pos, root->sectorsize); - lockend = lockstart + round_up(*write_bytes, root->sectorsize) - 1; + lockend = round_up(pos + *write_bytes, root->sectorsize) - 1; while (1) { lock_extent(&BTRFS_I(inode)->io_tree, lockstart, lockend); @@ -1434,7 +1434,8 @@ static noinline int check_can_nocow(struct inode *inode, loff_t pos, EXTENT_DIRTY | EXTENT_DELALLOC | EXTENT_DO_ACCOUNTING | EXTENT_DEFRAG, 0, 0, NULL, GFP_NOFS); - *write_bytes = min_t(size_t, *write_bytes, num_bytes); + *write_bytes = min_t(size_t, *write_bytes , + num_bytes - pos + lockstart); } unlock_extent(&BTRFS_I(inode)->io_tree, lockstart, lockend); |
