tests: uncache with missing PV

For now repair of cache with missing PVs via usage of --uncache.
More will follow later.

test/shell/lvconvert-repair-cache.sh

@@ -0,0 +1,121 @@
+#!/bin/sh
+
+# Copyright (C) 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
+
+# Test repairing of broken cached LV
+
+SKIP_WITH_LVMPOLLD=1
+
+. lib/inittest
+
+MKFS=mkfs.ext4
+FSCK=fsck
+
+which "$MKFS" || skip
+which "$FSCK" || skip
+
+#
+# Main
+#
+aux have_cache 1 3 0 || skip
+
+aux prepare_vg 4
+
+#if [ 1 -eq 0 ] ; then
+#############################
+###### WRITETHROUGH #########
+#############################
+
+# Create cached LV
+lvcreate --type cache-pool -L10 $vg/cpool "$dev1"
+lvcreate -H -L20 --cachemode writethrough -n $lv1 $vg/cpool "$dev2"
+
+"$MKFS" "$DM_DEV_DIR/$vg/$lv1"
+sync
+
+aux disable_dev "$dev1"
+
+#lvchange -an $vg
+
+# Check it is prompting fro confirmation
+not lvconvert --uncache $vg/$lv1
+# --yes to drop when Check its prompting
+lvconvert --yes --uncache $vg/$lv1
+
+"$FSCK" -n "$DM_DEV_DIR/$vg/$lv1"
+
+aux enable_dev "$dev1"
+
+##################
+
+lvcreate --type cache-pool -L10 $vg/cpool "$dev1"
+lvconvert -H --cachemode writethrough --cachepool $vg/cpool $lv1
+
+aux disable_dev "$dev2"
+
+# Check it is prompting for confirmation
+not lvconvert --uncache $vg/$lv1
+# --yes to drop when Check its prompting
+lvconvert --yes --uncache $vg/$lv1
+
+#lvconvert --repair $vg/$lv1 -vvvvv
+#/$lv1
+
+#lvchange -ay $vg
+
+aux enable_dev "$dev2"
+lvremove -ff $vg
+
+##########################
+###### WRITEBACK #########
+##########################
+#fi
+
+# Create cached LV  so metadata is on dev1 and data on dev2
+lvcreate -L5 -n meta $vg "$dev1"
+lvcreate -L10 -n cpool $vg "$dev2"
+lvconvert --yes --poolmetadata $vg/meta  --cachepool $vg/cpool
+
+lvcreate -H -L20 --cachemode writeback -n $lv1 $vg/cpool "$dev3"
+
+lvs -a -o+seg_pe_ranges,cachemode $vg
+
+"$MKFS" "$DM_DEV_DIR/$vg/$lv1"
+sync
+
+# Seriously damage cache metadata
+aux error_dev  "$dev1" 2054:2
+
+# Here we usually for the 1st. notice needs_check
+check lv_attr_bit state $vg/$lv1 "c"
+
+sleep .1
+
+# And now cache is finaly Failed
+check lv_attr_bit health $vg/$lv1 "F"
+check lv_field $vg/$lv1 lv_health_status "failed"
+
+aux disable_dev "$dev1"
+
+# Check it is prompting for confirmation
+not lvconvert --uncache $vg/$lv1
+# Check --yes is not enought to drop writethrough caching
+not lvconvert --yes --uncache $vg/$lv1
+# --force needs --yes to drop when Check its prompting
+not lvconvert --force --uncache $vg/$lv1
+
+lvconvert --force --yes --uncache $vg/$lv1
+
+not "$FSCK" -n "$DM_DEV_DIR/$vg/$lv1"
+
+aux enable_dev "$dev1"
+
+vgremove -ff $vg