Commit 1fb58a60 authored by Sage Weil's avatar Sage Weil Committed by Chris Mason
Browse files

Btrfs: fix arithmetic error in clone ioctl 



Fix an arithmetic error that was breaking extents cloned via the clone
ioctl starting in the second half of a file.

Signed-off-by: default avatarSage Weil <sage@newdream.net>
Signed-off-by: default avatarChris Mason <chris.mason@oracle.com>
parent 76dda93c

fs/btrfs/ioctl.c

+1 −2
Original line number Diff line number Diff line
@@ -1105,8 +1105,7 @@ static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd, 
					datao += off - key.offset;

					datal -= off - key.offset;

				}

				if (key.offset + datao + datal + key.offset >

				    off + len)

				if (key.offset + datao + datal > off + len)

					datal = off + len - key.offset - datao;

				/* disko == 0 means it's a hole */

				if (!disko)