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Commit d525e8ab authored by Li Zefan's avatar Li Zefan Committed by Chris Mason
Browse files

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



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: default avatarLi Zefan <lizf@cn.fujitsu.com>
Signed-off-by: default avatarChris Mason <chris.mason@oracle.com>
parent d72c0842

fs/btrfs/ioctl.c

+6 −0
Original line number Diff line number Diff line
@@ -2228,6 +2228,12 @@ static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd, 
	    !IS_ALIGNED(destoff, bs))

		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

	   another, and lock file content */

	while (1) {