From: Filipe Manana <fdmanana@xxxxxxxx>
Comparing the content of the pages in the range to deduplicate is now done
by the generic helper generic_remap_file_range_prep(), which takes care of
ensuring we do not compare/deduplicate undefined data beyond a file's eof
(range from eof to the next block boundary). So remove these checks which
are now redundant.
Signed-off-by: Filipe Manana <fdmanana@xxxxxxxx>
---
fs/btrfs/ioctl.c | 19 ++-----------------
1 file changed, 2 insertions(+), 17 deletions(-)
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 4e9efc93340e..3a27efa2b955 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -3206,31 +3206,16 @@ static void btrfs_double_inode_lock(struct inode *inode1, struct inode *inode2)
inode_lock_nested(inode2, I_MUTEX_CHILD);
}
-static int btrfs_extent_same_range(struct inode *src, u64 loff, u64 olen,
+static int btrfs_extent_same_range(struct inode *src, u64 loff, u64 len,
struct inode *dst, u64 dst_loff)
{
- u64 bs = BTRFS_I(src)->root->fs_info->sb->s_blocksize;
int ret;
- u64 len = olen;
-
- if (loff + len == src->i_size)
- len = ALIGN(src->i_size, bs) - loff;
- /*
- * For same inode case we don't want our length pushed out past i_size
- * as comparing that data range makes no sense.
- *
- * This effectively means we require aligned extents for the single
- * inode case, whereas the other cases allow an unaligned length so long
- * as it ends at i_size.
- */
- if (dst == src && len != olen)
- return -EINVAL;
/*
* Lock destination range to serialize with concurrent readpages().
*/
lock_extent(&BTRFS_I(dst)->io_tree, dst_loff, dst_loff + len - 1);
- ret = btrfs_clone(src, dst, loff, olen, len, dst_loff, 1);
+ ret = btrfs_clone(src, dst, loff, len, len, dst_loff, 1);
unlock_extent(&BTRFS_I(dst)->io_tree, dst_loff, dst_loff + len - 1);
return ret;
--
2.11.0
