check: wipe scratch devices between tests

Wipe the scratch devices in between each test to ensure that tests are
formatting them and not making assumptions about previous contents.

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

check

@@ -483,9 +483,8 @@ _check_filesystems()
 	if [ -f ${RESULT_DIR}/require_scratch ]; then
 		_check_scratch_fs || err=true
 		rm -f ${RESULT_DIR}/require_scratch*
-	else
-		_scratch_unmount 2> /dev/null
 	fi
+	_scratch_unmount 2> /dev/null
 }
 
 _expunge_test()
@@ -625,6 +624,8 @@ for section in $HOST_OPTIONS_SECTIONS; do
 	      echo "check: failed to mount \$SCRATCH_DEV using specified options"
 	      status=1
 	      exit
+	  else
+	      _scratch_unmount
 	  fi
 	fi
 
@@ -737,6 +738,7 @@ for section in $HOST_OPTIONS_SECTIONS; do
 			# _check_dmesg depends on this log in dmesg
 			touch ${RESULT_DIR}/check_dmesg
 		fi
+		_try_wipe_scratch_devs > /dev/null 2>&1
 		if [ "$DUMP_OUTPUT" = true ]; then
 			./$seq 2>&1 | tee $tmp.out
 			# Because $? would get tee's return code

common/rc

@@ -3977,6 +3977,15 @@ _require_fibmap()
 	rm -f $file
 }
 
+_try_wipe_scratch_devs()
+{
+	test -x "$WIPEFS_PROG" || return 0
+
+	for dev in $SCRATCH_DEV_POOL $SCRATCH_DEV $SCRATCH_LOGDEV $SCRATCH_RTDEV; do
+		test -b $dev && $WIPEFS_PROG -a $dev
+	done
+}
+
 init_rc
 
 ################################################################################

common/xfs

@@ -295,6 +295,7 @@ _require_xfs_db_command()
 	fi
 	command=$1
 
+	_scratch_mkfs_xfs >/dev/null 2>&1
 	_scratch_xfs_db -x -c "help" | grep $command > /dev/null || \
 		_notrun "xfs_db $command support is missing"
 }