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#!/usr/bin/env bash
# Copyright (C) 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
# Test writecache usage
SKIP_WITH_LVMPOLLD=1
. lib/inittest
# aux have_integrity 1 0 0 || skip
which mkfs.xfs || skip
mnt="mnt"
mkdir -p $mnt
aux prepare_devs 4 64
for i in `seq 1 16384`; do echo -n "A" >> fileA; done
for i in `seq 1 16384`; do echo -n "B" >> fileB; done
for i in `seq 1 16384`; do echo -n "C" >> fileC; done
_prepare_vg() {
# zero devs so we are sure to find the correct file data
# on the underlying devs when corrupting it
dd if=/dev/zero of="$dev1" || true
dd if=/dev/zero of="$dev2" || true
dd if=/dev/zero of="$dev3" || true
dd if=/dev/zero of="$dev4" || true
vgcreate $SHARED $vg "$dev1" "$dev2" "$dev3" "$dev4"
}
_test_fs_with_error() {
mkfs.xfs -f "$DM_DEV_DIR/$vg/$lv1"
mount "$DM_DEV_DIR/$vg/$lv1" $mnt
# add original data
cp fileA $mnt
cp fileB $mnt
cp fileC $mnt
umount $mnt
lvchange -an $vg/$lv1
# corrupt the original data on the underying dev
# flip one bit in fileB, changing a 0x42 to 0x43
# the bit is changed in the last 4096 byte block
# of the file, so when reading back the file we
# will get the first three 4096 byte blocks, for
# a total of 12288 bytes before getting an error
# on the last 4096 byte block.
xxd "$dev1" > dev1.txt
tac dev1.txt > dev1.rev
sed -e '0,/4242 4242 4242 4242 4242 4242 4242 4242/ s/4242 4242 4242 4242 4242 4242 4242 4242/4242 4242 4242 4242 4242 4242 4242 4243/' dev1.rev > dev1.rev.bad
tac dev1.rev.bad > dev1.bad
xxd -r dev1.bad > "$dev1"
rm dev1.txt dev1.rev dev1.rev.bad dev1.bad
lvchange -ay $vg/$lv1
mount "$DM_DEV_DIR/$vg/$lv1" $mnt
# read complete fileA which was not corrupted
dd if=$mnt/fileA of=tmp bs=1k
ls -l tmp
stat -c %s tmp
diff fileA tmp
rm tmp
# read partial fileB which was corrupted
not dd if=$mnt/fileB of=tmp bs=1k
ls -l tmp
stat -c %s tmp | grep 12288
not diff fileB tmp
rm tmp
umount $mnt
}
_test_fs_with_raid1() {
mkfs.xfs -f "$DM_DEV_DIR/$vg/$lv1"
mount "$DM_DEV_DIR/$vg/$lv1" $mnt
# add original data
cp fileA $mnt
cp fileB $mnt
cp fileC $mnt
umount $mnt
lvchange -an $vg/$lv1
xxd "$dev1" > dev1.txt
tac dev1.txt > dev1.rev
sed -e '0,/4242 4242 4242 4242 4242 4242 4242 4242/ s/4242 4242 4242 4242 4242 4242 4242 4242/4242 4242 4242 4242 4242 4242 4242 4243/' dev1.rev > dev1.rev.bad
tac dev1.rev.bad > dev1.bad
xxd -r dev1.bad > "$dev1"
rm dev1.txt dev1.rev dev1.rev.bad dev1.bad
lvchange -ay $vg/$lv1
mount "$DM_DEV_DIR/$vg/$lv1" $mnt
# read complete fileA which was not corrupted
dd if=$mnt/fileA of=tmp bs=1k
ls -l tmp
stat -c %s tmp | grep 16384
diff fileA tmp
rm tmp
# read complete fileB, corruption is corrected by raid1
dd if=$mnt/fileB of=tmp bs=1k
ls -l tmp
stat -c %s tmp | grep 16384
diff fileB tmp
rm tmp
umount $mnt
}
_prepare_vg
lvcreate --integrity y -n $lv1 -l 8 $vg "$dev1"
_test_fs_with_error
lvchange -an $vg/$lv1
vgremove -ff $vg
_prepare_vg
lvcreate -y --integrity internal -n $lv1 -l 8 $vg "$dev1"
_test_fs_with_error
lvchange -an $vg/$lv1
vgremove -ff $vg
_prepare_vg
lvcreate -an -n meta -L4M $vg "$dev2"
lvcreate --integrity y --integritymetadata meta -n $lv1 -l 8 $vg "$dev1"
_test_fs_with_error
lvchange -an $vg/$lv1
vgremove -ff $vg
_prepare_vg
lvcreate --type raid1 -m1 --integrity y -n $lv1 -l 8 $vg
_test_fs_with_raid1
lvchange -an $vg/$lv1
vgremove -ff $vg
_prepare_vg
lvcreate --type raid1 -m2 --integrity y -n $lv1 -l 8 $vg
_test_fs_with_raid1
lvchange -an $vg/$lv1
vgremove -ff $vg
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