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#!/usr/bin/env bash
# Copyright (C) 2008-2013,2018 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
SKIP_WITH_LVMPOLLD=1
. lib/inittest
aux prepare_devs 3
get_devs
#
# Test "old metadata" repair which occurs when the VG is written
# and one of the PVs in the VG does not get written to, and then
# the PV reappears with the old metadata. This can happen if
# a command is killed or crashes after writing new metadata to
# only some of the PVs in the VG, or if a PV is temporarily
# inaccessible while a VG is written.
#
vgcreate $SHARED $vg "$dev1" "$dev2" "$dev3"
#
# Test that vgck --updatemetadata will update old metadata.
#
lvcreate -n $lv1 -l1 -an $vg "$dev1"
lvcreate -n $lv2 -l1 -an $vg "$dev1"
aux disable_dev "$dev2"
pvs
pvs "$dev1"
not pvs "$dev2"
pvs "$dev3"
lvs $vg/$lv1
lvs $vg/$lv2
lvremove $vg/$lv2
aux enable_dev "$dev2"
pvs 2>&1 | tee out
grep "ignoring metadata seqno" out
pvs "$dev1"
pvs "$dev2"
pvs "$dev3"
lvs $vg/$lv1
not lvs $vg/$lv2
# fixes the old metadata on dev1
vgck --updatemetadata $vg
pvs 2>&1 | tee out
not grep "ignoring metadata seqno" out
pvs "$dev1"
pvs "$dev2"
pvs "$dev3"
lvs $vg/$lv1
not lvs $vg/$lv2
#
# Test that any writing command will also update the
# old metadata.
#
lvcreate -n $lv2 -l1 -an $vg "$dev1"
aux disable_dev "$dev2"
pvs
pvs "$dev1"
not pvs "$dev2"
pvs "$dev3"
lvs $vg/$lv1
lvs $vg/$lv2
lvremove $vg/$lv2
aux enable_dev "$dev2"
pvs 2>&1 | tee out
grep "ignoring metadata seqno" out
pvs "$dev1"
pvs "$dev2"
pvs "$dev3"
lvs $vg/$lv1
not lvs $vg/$lv2
# fixes the old metadata on dev1
lvcreate -n $lv3 -l1 -an $vg
pvs 2>&1 | tee out
not grep "ignoring metadata seqno" out
pvs "$dev1"
pvs "$dev2"
pvs "$dev3"
lvs $vg/$lv1
not lvs $vg/$lv2
vgremove -ff $vg
#
# First two PVs with one mda, where both have old metadata.
# Third PV with two mdas, where the first mda has old
# metadata, and the second mda has current metadata.
#
dd if=/dev/zero of="$dev1" || true
dd if=/dev/zero of="$dev2" || true
dd if=/dev/zero of="$dev3" || true
pvcreate "$dev1"
pvcreate "$dev2"
pvcreate --pvmetadatacopies 2 "$dev3"
vgcreate $SHARED $vg "$dev1" "$dev2" "$dev3"
lvcreate -n $lv1 -l1 -an $vg "$dev3"
lvcreate -n $lv2 -l1 -an $vg "$dev3"
# Save the metadata at this point...
dd if="$dev1" of=meta1 bs=4k count=4
dd if="$dev2" of=meta2 bs=4k count=4
dd if="$dev3" of=meta3 bs=4k count=4
# and now change metadata so the saved copies are old
lvcreate -n $lv3 -l1 -an $vg "$dev3"
# Copy the saved metadata back to the three
# devs first mda, leaving the second mda on
# dev3 as the only latest copy of the metadata.
dd if=meta1 of="$dev1"
dd if=meta2 of="$dev2"
dd if=meta3 of="$dev3"
pvs 2>&1 | tee out
grep "ignoring metadata seqno" out
pvs "$dev1"
pvs "$dev2"
pvs "$dev3"
# We still see the three LVs since we are using
# the latest copy of metadata from dev3:mda2
lvs $vg/$lv1
lvs $vg/$lv2
lvs $vg/$lv3
# This command which writes the VG should update
# all of the old copies.
lvcreate -n $lv4 -l1 -an $vg
pvs 2>&1 | tee out
not grep "ignoring metadata seqno" out
pvs "$dev1"
pvs "$dev2"
pvs "$dev3"
lvs $vg/$lv1
lvs $vg/$lv2
lvs $vg/$lv3
lvs $vg/$lv4
vgchange -an $vg
vgremove -ff $vg
# Test when the metadata on two PVs have the same seqno
# but different checksums.
dd if=/dev/zero of="$dev1" || true
dd if=/dev/zero of="$dev2" || true
pvcreate "$dev1"
pvcreate "$dev2"
vgcreate $SHARED $vg "$dev1" "$dev2"
lvcreate -n $lv1 -l1 -an $vg
pvck --dump metadata -f meta "$dev2"
# change an unimportant character so the metadata is effectively
# the same in content but will have a different checksum
sed 's/Linux/linux/' meta > meta2
# write out the changed metadata
pvck --repair -y -f meta2 "$dev2"
# the vg can still be used but will produce warnings
# the mda on one pv is updated, but not the other,
# which changes the error from a checksum inconsistency
# into a seqno inconsistency.
lvs $vg 2>&1 | tee out
grep WARNING out
grep $lv1 out
lvcreate -n $lv2 -l1 -an $vg 2>&1 |tee out
grep WARNING out
lvs $vg 2>&1 | tee out
grep WARNING out
grep $lv1 out
grep $lv2 out
# correct the senqo inconsistency
vgck --updatemetadata $vg
lvs $vg 2>&1 | tee out
not grep WARNING out
grep $lv1 out
grep $lv2 out
vgremove -ff $vg
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