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#!/usr/bin/env bash
# Copyright (C) 2008 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
xxd -v || skip
aux prepare_devs 1 256
get_devs
# Fill with random data so if the space between metadata
# copies are not zeroed the grep for zeros will fail.
dd if=/dev/urandom of="$dev1" bs=1M count=1 || true
dd if=/dev/urandom of="$dev1" bs=1M skip=15 count=1 || true
pvcreate --pvmetadatacopies 2 "$dev1"
vgcreate $SHARED "$vg" "$dev1"
for i in $(seq 1 50); do lvcreate -l1 -an $vg; done
# Check metadata copies are separated by zeroes in the first mda
dd if="$dev1" of=meta.raw bs=1M count=1
xxd meta.raw > meta.txt
# to help debug if the next grep fails
ls -l meta.txt
head -n 100 meta.txt
grep -A4 -B4 '01200:' meta.txt
_vg="$vg "
_vg="${_vg:0:16}"
grep -B1 "$_vg" meta.txt > meta.vg
cat meta.vg
grep -v "$_vg" meta.vg > meta.zeros
cat meta.zeros
grep '0000 0000 0000 0000 0000 0000 0000 0000' meta.zeros > meta.count
# wc will often equal 51, but some natural variability in
# metadata locations/content mean that some lines do not
# require a full line of zero padding, and will not match
# the grep for a full row of zeros. So, check that more
# than 20 lines match the full row of zeros (this is a
# random choice, and this isn't a perfect way to test for
# zero padding.)
test "$(wc -l < meta.count)" -gt 20
rm meta.raw meta.txt meta.vg meta.zeros meta.count
#
# Check metadata copies are separated by zeroes in the second mda
#
dd if="$dev1" of=meta.raw bs=1M seek=15 count=1
xxd meta.raw > meta.txt
grep -B1 "$_vg" meta.txt > meta.vg
cat meta.vg
grep -v "$_vg" meta.vg > meta.zeros
cat meta.zeros
grep '0000 0000 0000 0000 0000 0000 0000 0000' meta.zeros > meta.count
test "$(wc -l < meta.count)" -gt 20
vgremove -ff $vg
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