xfs/006: refactor reset error handling code to common/rc

Nearly 1/3 code is used to reset the xfs error handling attributes,
This part can be picked up, and used for other cases. So move them
to a new function _reset_xfs_sysfs_error_handling() in common/rc.

Signed-off-by: Zorro Lang <zlang@redhat.com>
Reviewed-by: Eryu Guan <eguan@redhat.com>
Signed-off-by: Eryu Guan <eguan@redhat.com>

common/rc

@@ -3890,6 +3890,43 @@ _get_fs_sysfs_attr()
 	cat /sys/fs/${FSTYP}/${dname}/${attr}
 }
 
+
+# Reset all xfs error handling attributes, set them to original
+# status.
+#
+# Only one argument, and it's mandatory:
+#  - dev: device name, e.g. $SCRATCH_DEV
+#
+# Note: this function only works for XFS
+_reset_xfs_sysfs_error_handling()
+{
+	local dev=$1
+
+	if [ ! -b "$dev" -o "$FSTYP" != "xfs" ];then
+		_fail "Usage: reset_xfs_sysfs_error_handling <device>"
+	fi
+
+	_set_fs_sysfs_attr $dev error/fail_at_unmount 1
+	echo -n "error/fail_at_unmount="
+	_get_fs_sysfs_attr $dev error/fail_at_unmount
+
+	# Make sure all will be configured to retry forever by default, except
+	# for ENODEV, which is an unrecoverable error, so it will be configured
+	# to not retry on error by default.
+	for e in default EIO ENOSPC; do
+		_set_fs_sysfs_attr $dev \
+				   error/metadata/${e}/max_retries -1
+		echo -n "error/metadata/${e}/max_retries="
+		_get_fs_sysfs_attr $dev error/metadata/${e}/max_retries
+
+		_set_fs_sysfs_attr $dev \
+				   error/metadata/${e}/retry_timeout_seconds 0
+		echo -n "error/metadata/${e}/retry_timeout_seconds="
+		_get_fs_sysfs_attr $dev \
+				   error/metadata/${e}/retry_timeout_seconds
+	done
+}
+
 # Skip if we are running an older binary without the stricter input checks.
 # Make multiple checks to be sure that there is no regression on the one
 # selected feature check, which would skew the result.

tests/xfs/006

@@ -57,31 +57,18 @@ _scratch_mkfs > $seqres.full 2>&1
 _dmerror_init
 _dmerror_mount
 
-# Enable fail_at_unmount, so XFS stops retrying on errors at unmount
-# time. _fail the test if we fail to set it to 1, because the test
-# probably will hang in such case and block subsequent tests.
-_set_fs_sysfs_attr $DMERROR_DEV error/fail_at_unmount 1
+# Make sure all error handling attributes are original status
+reset_xfs_sysfs_error_handling $DMERROR_DEV
+
+# Make sure fail_at_unmount is enabled, so XFS stops retrying on
+# errors at unmount time. _fail the test if we fail to set it to 1,
+# because the test probably will hang in such case and block
+# subsequent tests.
 attr=`_get_fs_sysfs_attr $DMERROR_DEV error/fail_at_unmount`
 if [ "$attr" != "1" ]; then
 	_fail "Failed to set error/fail_at_unmount: $attr"
 fi
 
-# Make sure all will be configured to retry forever by default, except
-# for ENODEV, which is an unrecoverable error, so it will be configured
-# to not retry on error by default.
-for e in default EIO ENOSPC; do
-	_set_fs_sysfs_attr $DMERROR_DEV \
-			   error/metadata/${e}/max_retries -1
-	echo -n "error/metadata/${e}/max_retries="
-	_get_fs_sysfs_attr $DMERROR_DEV error/metadata/${e}/max_retries
-
-	_set_fs_sysfs_attr $DMERROR_DEV \
-			   error/metadata/${e}/retry_timeout_seconds 0
-	echo -n "error/metadata/${e}/retry_timeout_seconds="
-	_get_fs_sysfs_attr $DMERROR_DEV \
-			   error/metadata/${e}/retry_timeout_seconds
-done
-
 # start a metadata-intensive workload, but no data allocation operation.
 # Because uncompleted new space allocation I/Os may cause XFS to shutdown
 # after loading error table.

tests/xfs/006.out

@@ -1,4 +1,5 @@
 QA output created by 006
+error/fail_at_unmount=1
 error/metadata/default/max_retries=-1
 error/metadata/default/retry_timeout_seconds=0
 error/metadata/EIO/max_retries=-1