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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_writecache 1 0 0 || skip
which mkfs.xfs || skip
# scsi_debug devices with 512 LBS 512 PBS
aux prepare_scsi_debug_dev 1200
check sysfs "$(< SCSI_DEBUG_DEV)" queue/logical_block_size "512"
check sysfs "$(< SCSI_DEBUG_DEV)" queue/physical_block_size "512"
aux prepare_devs 2 600
blockdev --getss "$dev1"
blockdev --getpbsz "$dev1"
blockdev --getss "$dev2"
blockdev --getpbsz "$dev2"
mnt="mnt"
mkdir -p $mnt
awk 'BEGIN { while (z++ < 16384) printf "A" }' > fileA
awk 'BEGIN { while (z++ < 16384) printf "B" }' > fileB
awk 'BEGIN { while (z++ < 16384) printf "C" }' > fileC
# generate random data
dd if=/dev/urandom of=randA bs=512K count=2
dd if=/dev/urandom of=randB bs=512K count=3
dd if=/dev/urandom of=randC bs=512K count=4
_add_new_data_to_mnt() {
mkfs.xfs -f "$DM_DEV_DIR/$vg/$lv1"
mount "$DM_DEV_DIR/$vg/$lv1" $mnt
# add original data
cp randA $mnt
cp randB $mnt
cp randC $mnt
mkdir $mnt/1
cp fileA $mnt/1
cp fileB $mnt/1
cp fileC $mnt/1
mkdir $mnt/2
cp fileA $mnt/2
cp fileB $mnt/2
cp fileC $mnt/2
sync
}
_add_more_data_to_mnt() {
mkdir $mnt/more
cp fileA $mnt/more
cp fileB $mnt/more
cp fileC $mnt/more
cp randA $mnt/more
cp randB $mnt/more
cp randC $mnt/more
sync
}
_verify_data_on_mnt() {
diff randA $mnt/randA
diff randB $mnt/randB
diff randC $mnt/randC
diff fileA $mnt/1/fileA
diff fileB $mnt/1/fileB
diff fileC $mnt/1/fileC
diff fileA $mnt/2/fileA
diff fileB $mnt/2/fileB
diff fileC $mnt/2/fileC
}
_verify_more_data_on_mnt() {
diff randA $mnt/more/randA
diff randB $mnt/more/randB
diff randC $mnt/more/randC
diff fileA $mnt/more/fileA
diff fileB $mnt/more/fileB
diff fileC $mnt/more/fileC
}
_verify_data_on_lv() {
lvchange -ay $vg/$lv1
mount "$DM_DEV_DIR/$vg/$lv1" $mnt
_verify_data_on_mnt
rm $mnt/randA
rm $mnt/randB
rm $mnt/randC
rm -rf $mnt/1
rm -rf $mnt/2
umount $mnt
lvchange -an $vg/$lv1
}
vgcreate $SHARED $vg "$dev1"
vgextend $vg "$dev2"
# Use a large enough size so that the cleaner will not
# finish immediately when detaching, and will require
# a secondary check from command top level.
lvcreate -n $lv1 -L 560M -an $vg "$dev1"
lvcreate -n $lv2 -L 500M -an $vg "$dev2"
lvchange -ay $vg/$lv1
blockdev --getss "$DM_DEV_DIR/$vg/$lv1"
blockdev --getpbsz "$DM_DEV_DIR/$vg/$lv1"
lvconvert --yes --type writecache --cachevol $lv2 $vg/$lv1
dmsetup table $vg-$lv1
blockdev --getss "$DM_DEV_DIR/$vg/$lv1"
blockdev --getpbsz "$DM_DEV_DIR/$vg/$lv1"
_add_new_data_to_mnt
_add_more_data_to_mnt
_verify_data_on_mnt
dd if=/dev/zero of=$mnt/big1 bs=1M count=100 conv=fdatasync
dd if=/dev/zero of=$mnt/big2 bs=1M count=100 conv=fdatasync
dd if=/dev/zero of=$mnt/big3 bs=1M count=100 conv=fdatasync
dd if=/dev/zero of=$mnt/big4 bs=1M count=100 conv=fdatasync
lvconvert --splitcache $vg/$lv1
check lv_field $vg/$lv1 segtype linear
check lv_field $vg/$lv2 segtype linear
dmsetup table $vg-$lv1
_verify_data_on_mnt
_verify_more_data_on_mnt
dd if=$mnt/big4 of=/dev/null bs=1M count=100
umount $mnt
lvchange -an $vg/$lv1
_verify_data_on_lv
lvchange -an $vg/$lv2
lvremove $vg/$lv1
lvremove $vg/$lv2
# Repeat similar using uncache
lvcreate -n $lv1 -L 560M -an $vg "$dev1"
lvcreate -n $lv2 -L 500M -an $vg "$dev2"
lvchange -ay $vg/$lv1
lvconvert --yes --type writecache --cachevol $lv2 $vg/$lv1
_add_new_data_to_mnt
_add_more_data_to_mnt
dd if=/dev/zero of=$mnt/big1 bs=1M count=100 conv=fdatasync
umount $mnt
lvchange -an $vg/$lv1
lvconvert --uncache $vg/$lv1
check lv_field $vg/$lv1 segtype linear
not lvs $vg/$lv2
lvchange -ay $vg/$lv1
mount "$DM_DEV_DIR/$vg/$lv1" $mnt
_verify_data_on_mnt
_verify_more_data_on_mnt
umount $mnt
lvchange -an $vg/$lv1
vgremove -ff $vg
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