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Btrfs: add dummy extent if dst offset excceeds file end in

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You can see there's no file extent with range [0, 4096]. Check this by
btrfsck:

 # btrfsck /dev/sda7
 root 5 inode 258 errors 100
 ...

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Li Zefan
2011-09-11 10:52:25 -04:00
committed by Chris Mason
parent d72c0842ff
commit d525e8ab02
1 changed files with 6 additions and 0 deletions
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6
fs/btrfs/ioctl.c
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@@ -2228,6 +2228,12 @@ static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd,
!IS_ALIGNED(destoff, bs)) !IS_ALIGNED(destoff, bs))
goto out_unlock; goto out_unlock;
if (destoff > inode->i_size) {
ret = btrfs_cont_expand(inode, inode->i_size, destoff);
if (ret)
goto out_unlock;
}
/* do any pending delalloc/csum calc on src, one way or /* do any pending delalloc/csum calc on src, one way or
another, and lock file content */ another, and lock file content */
while (1) { while (1) {