xfs: scrub fs at the end of the test

Teach _check_xfs_filesystem to scrub mounted filesystems before
unmounting and fscking them. This is mostly to test the online scrub
tool...

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Eryu Guan <eguan@redhat.com>
Signed-off-by: Eryu Guan <eguan@redhat.com>

README

@@ -94,6 +94,9 @@ Preparing system for tests (IRIX and Linux):
                run xfs_repair -n to check the filesystem; xfs_repair to rebuild
                metadata indexes; and xfs_repair -n (a third time) to check the
                results of the rebuilding.
+             - set TEST_XFS_SCRUB=1 to have _check_xfs_filesystem run
+               xfs_scrub -vd to scrub the filesystem metadata online before
+               unmounting to run the offline check.
 
         - or add a case to the switch in common/config assigning
           these variables based on the hostname of your test

common/config

@@ -163,6 +163,7 @@ export XFS_REPAIR_PROG="`set_prog_path xfs_repair`"
 export XFS_DB_PROG="`set_prog_path xfs_db`"
 export XFS_GROWFS_PROG=`set_prog_path xfs_growfs`
 export XFS_IO_PROG="`set_prog_path xfs_io`"
+export XFS_SCRUB_PROG="`set_prog_path xfs_scrub`"
 export XFS_PARALLEL_REPAIR_PROG="`set_prog_path xfs_prepair`"
 export XFS_PARALLEL_REPAIR64_PROG="`set_prog_path xfs_prepair64`"
 export __XFSDUMP_PROG="`set_prog_path xfsdump`"

common/rc

@@ -2400,6 +2400,13 @@ _check_xfs_filesystem()
 
     if [ "$type" = "xfs" ]
     then
+        if [ -n "$TEST_XFS_SCRUB" ] && [ -x "$XFS_SCRUB_PROG" ]; then
+            "$XFS_SCRUB_PROG" $scrubflag -vd $device >>$seqres.full
+            if [ $? -ne 0 ]; then
+                echo "filesystem on $device failed scrub (see $seqres.full)"
+                ok=0
+            fi
+        fi
         # mounted ...
         mountpoint=`_umount_or_remount_ro $device`
     fi