From: Eric Sandeen <sandeen@sandeen.net>
Date: Tue, 10 Jan 2017 02:18:49 +0000 (-0600)
Subject: xfs: handle cow fork in xfs_bmap_trace_exlist
X-Git-Tag: v4.10.0-rc1~66
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=8f690d2497b6acda01c7efa23644fe7fc4ee937a;p=thirdparty%2Fxfsprogs-dev.git

xfs: handle cow fork in xfs_bmap_trace_exlist

Source kernel commit: c44a1f22626c153976289e1cd67bdcdfefc16e1f

By inspection, xfs_bmap_trace_exlist isn't handling cow forks,
and will trace the data fork instead.

Fix this by setting state appropriately if whichfork
== XFS_COW_FORK.

()___()
< @ @ >
 |   |
 {o_o}
  (|)

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dave Chinner <david@fromorbit.com>
Signed-off-by: Eric Sandeen <sandeen@sandeen.net>
---

diff --git a/libxfs/xfs_bmap.c b/libxfs/xfs_bmap.c
index 4417da885..ff67dcf6a 100644
--- a/libxfs/xfs_bmap.c
+++ b/libxfs/xfs_bmap.c
@@ -509,7 +509,7 @@ void
 xfs_bmap_trace_exlist(
 	xfs_inode_t	*ip,		/* incore inode pointer */
 	xfs_extnum_t	cnt,		/* count of entries in the list */
-	int		whichfork,	/* data or attr fork */
+	int		whichfork,	/* data or attr or cow fork */
 	unsigned long	caller_ip)
 {
 	xfs_extnum_t	idx;		/* extent record index */
@@ -518,6 +518,8 @@ xfs_bmap_trace_exlist(
 
 	if (whichfork == XFS_ATTR_FORK)
 		state |= BMAP_ATTRFORK;
+	else if (whichfork == XFS_COW_FORK)
+		state |= BMAP_COWFORK;
 
 	ifp = XFS_IFORK_PTR(ip, whichfork);
 	ASSERT(cnt == xfs_iext_count(ifp));