[PATCH 3.10 158/319] xfs: fix superblock inprogress check

Willy Tarreau
2017-02-05T19:27:41Z

From: Dave Chinner <dchinner@redhat.com>

commit f3d7ebdeb2c297bd26272384e955033493ca291c upstream.

>From inspection, the superblock sb_inprogress check is done in the
verifier and triggered only for the primary superblock via a
"bp->b_bn == XFS_SB_DADDR" check.

Unfortunately, the primary superblock is an uncached buffer, and
hence it is configured by xfs_buf_read_uncached() with:

bp->b_bn = XFS_BUF_DADDR_NULL; /* always null for uncached buffers */

And so this check never triggers. Fix it.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dave Chinner <david@fromorbit.com>
[wt: s/xfs_sb.c/xfs_mount.c in 3.10]

Signed-off-by: Willy Tarreau <w@1wt.eu>
---
fs/xfs/xfs_mount.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c
index e8e310c..363c4cc 100644
--- a/fs/xfs/xfs_mount.c
+++ b/fs/xfs/xfs_mount.c
@@ -689,7 +689,8 @@ xfs_sb_verify(
* Only check the in progress field for the primary superblock as
* mkfs.xfs doesn't clear it from secondary superblocks.
*/
- return xfs_mount_validate_sb(mp, &sb, bp->b_bn == XFS_SB_DADDR,
+ return xfs_mount_validate_sb(mp, &sb,
+ bp->b_maps[0].bm_bn == XFS_SB_DADDR,
check_version);
}

--
2.8.0.rc2.1.gbe9624a