tests: flushing of cache is abortable

test/shell/lvconvert-cache-abort.sh

@@ -0,0 +1,54 @@
+#!/bin/sh
+# Copyright (C) 2014-2016 Red Hat, 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 v.2.
+#
+# 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
+
+# Exercise cache flushing is abortable
+
+SKIP_WITH_LVMLOCKD=1
+SKIP_WITH_LVMPOLLD=1
+
+. lib/inittest
+
+aux have_cache 1 3 0 || skip
+
+aux prepare_vg 2
+
+# Data device on later delayed dev1
+lvcreate -L4 -n cpool $vg "$dev1"
+lvconvert -y --type cache-pool $vg/cpool "$dev2"
+lvcreate -H -L 4 -n $lv1 --chunksize 32k --cachemode writeback --cachepool $vg/cpool $vg "$dev2"
+
+#
+# Ensure cache gets promoted blocks
+#
+for i in $(seq 1 10) ; do
+echo 3 >/proc/sys/vm/drop_caches
+dd if=/dev/zero of="$DM_DEV_DIR/$vg/$lv1" bs=64K count=20 conv=fdatasync || true
+echo 3 >/proc/sys/vm/drop_caches
+dd if="$DM_DEV_DIR/$vg/$lv1" of=/dev/null bs=64K count=20 || true
+done
+
+
+# Delay dev to ensure we have some time to 'capture' interrupt in flush
+aux delay_dev "$dev1" 0 500 $(get first_extent_sector "$dev1"):
+
+dd if=/dev/zero of="$DM_DEV_DIR/$vg/$lv1" bs=4k count=100 conv=fdatasync
+
+LVM_TEST_TAG="kill_me_$PREFIX" lvconvert -v --splitcache $vg/$lv1 >log 2>&1 &
+PID_CONVERT=$!
+sleep 0.1
+kill -INT $PID_CONVERT
+aux enable_dev "$dev1"
+wait
+egrep "Flushing.*aborted" log
+# check the table got restored
+check grep_dmsetup table $vg-$lv1 "writeback"
+
+vgremove -f $vg