lvm2/0023-tests-idm-Add-testing-for-the-fabric-failure-and-tim.patch

From 91d3b568758cbb11ffd797c864d03f7f36426efc Mon Sep 17 00:00:00 2001
From: Leo Yan <leo.yan@linaro.org>
Date: Thu, 3 Jun 2021 17:59:19 +0800
Subject: [PATCH 23/33] tests: idm: Add testing for the fabric failure and
 timeout

If the fabric is broken instantly, the drives connected on the fabric
will disappear from the system.  For worst case, the lease is timeout
and the drives cannot recovery back.  So a new test is added to emulate
this scenario, it uses a drive for LVM operations and this drive is also
used for locking scheme; if the drive and all its associated paths (if
the drive supports multiple paths) are disconnected, the lock manager
should stop the lockspace for the VG/LVs.

And afterwards, if the drive recovers back, the VG/LV resident in the
drive should be operated properly.  The test command is as below:

  # make check_lvmlockd_idm \
	LVM_TEST_BACKING_DEVICE=/dev/sdp3 LVM_TEST_FAILURE=1 \
	T=idm_fabric_failure_timeout.sh

Signed-off-by: Leo Yan <leo.yan@linaro.org>
Signed-off-by: Heming Zhao <heming.zhao@suse.com>
---
 test/shell/idm_fabric_failure_timeout.sh | 74 ++++++++++++++++++++++++++++++++
 1 file changed, 74 insertions(+)
 create mode 100644 test/shell/idm_fabric_failure_timeout.sh

diff --git a/test/shell/idm_fabric_failure_timeout.sh b/test/shell/idm_fabric_failure_timeout.sh
new file mode 100644
index 000000000000..cf71f760970a
--- /dev/null
+++ b/test/shell/idm_fabric_failure_timeout.sh
@@ -0,0 +1,74 @@
+#!/usr/bin/env bash
+
+# Copyright (C) 2020 Seagate, Inc. All rights reserved.
+#
+# This copyrighted material is made available to anyone wishing to use,
+# modify, copy, or redistribute it subject to the terms and conditions
+# of the GNU General Public License v2.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation,
+# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+
+
+SKIP_WITH_LVMPOLLD=1
+
+. lib/inittest
+
+[ -z "$LVM_TEST_LOCK_TYPE_IDM" ] && skip;
+[ -z "$LVM_TEST_FAILURE" ] && skip;
+
+aux prepare_devs 1
+aux extend_filter_LVMTEST
+
+DRIVE1=`dmsetup deps -o devname $dev1 | awk '{gsub(/[()]/,""); print $4;}' | sed 's/[0-9]*$//'`
+
+# The previous device-mapper are removed, but LVM still can directly
+# access VGs from the specified physical drives.  So enable drives
+# for these drives.
+aux extend_filter_LVMTEST "a|/dev/$DRIVE1*|"
+aux lvmconf "devices/allow_changes_with_duplicate_pvs = 1"
+
+vgcreate $SHARED $vg "$dev1"
+
+# Create new logic volume
+lvcreate -a ey --zero n -l 1 -n $lv1 $vg
+
+drive_list=($DRIVE1)
+
+# Find all drives with the same WWN and delete them from system,
+# so that we can emulate the same drive with multiple paths are
+# disconnected with system.
+drive_wwn=`udevadm info /dev/${DRIVE1} | awk -F= '/E: ID_WWN=/ {print $2}'`
+for dev in /dev/*; do
+	if [ -b "$dev" ] && [[ ! "$dev" =~ [0-9] ]]; then
+		wwn=`udevadm info "${dev}" | awk -F= '/E: ID_WWN=/ {print $2}'`
+		if [ "$wwn" = "$drive_wwn" ]; then
+			base_name="$(basename -- ${dev})"
+			drive_list+=("$base_name")
+			host_list+=(`readlink /sys/block/$base_name | awk -F'/' '{print $6}'`)
+		fi
+	fi
+done
+
+for d in "${drive_list[@]}"; do
+	[ -f /sys/block/$d/device/delete ] && echo 1 > /sys/block/$d/device/delete
+done
+
+# Fail to create new logic volume
+not lvcreate -a n --zero n -l 1 -n $lv2 $vg
+
+# Wait for lock time out caused by drive failure
+sleep 70
+
+check grep_lvmlockd_dump "S lvm_$vg kill_vg"
+lvmlockctl --drop $vg
+
+# Rescan drives so can probe the deleted drives and join back them
+for h in "${host_list[@]}"; do
+	[ -f /sys/class/scsi_host/${h}/scan ] && echo "- - -" > /sys/class/scsi_host/${h}/scan
+done
+
+# After the drive is reconnected, $vg should be visible again.
+vgchange --lock-start
+vgremove -ff $vg
-- 
1.8.3.1