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authorLi Zefan <lizf@cn.fujitsu.com>2010-11-19 04:36:34 +0300
committerChris Mason <chris.mason@oracle.com>2010-11-22 06:26:06 +0300
commit5f3888ff6f0b9dce60705765752b788a92557644 (patch)
treec7745507d85f68b188f0c9b11cc6f783f0d0cb86
parent2a6b8daedaf3682bed3fc1d4e2390491f6e19c49 (diff)
downloadlinux-5f3888ff6f0b9dce60705765752b788a92557644.tar.xz
btrfs: Set file size correctly in file clone
Set src_offset = 0, src_length = 20K, dest_offset = 20K. And the original filesize of the dest file 'file2' is 30K: # ls -l /mnt/file2 -rw-r--r-- 1 root root 30720 Nov 18 16:42 /mnt/file2 Now clone file1 to file2, the dest file should be 40K, but it still shows 30K: # ls -l /mnt/file2 -rw-r--r-- 1 root root 30720 Nov 18 16:42 /mnt/file2 Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
-rw-r--r--fs/btrfs/ioctl.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 81b47bd8a55a..6b4bfa72bf8d 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -1873,8 +1873,8 @@ static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd,
* but shouldn't round up the file size
*/
endoff = new_key.offset + datal;
- if (endoff > off+olen)
- endoff = off+olen;
+ if (endoff > destoff+olen)
+ endoff = destoff+olen;
if (endoff > inode->i_size)
btrfs_i_size_write(inode, endoff);