#!/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 single lv cache options

SKIP_WITH_LVMPOLLD=1

. lib/inittest

mkfs_mount_umount()
{
        lvt=$1

        lvchange -ay $vg/$lvt

        mkfs.xfs -f -s size=4096 "$DM_DEV_DIR/$vg/$lvt"
        mount "$DM_DEV_DIR/$vg/$lvt" "$mount_dir"
        cp pattern1 "$mount_dir/pattern1"
        dd if=/dev/zero of="$mount_dir/zeros2M" bs=1M count=32 conv=fdatasync
        umount "$mount_dir"

        lvchange -an $vg/$lvt
}

mount_umount()
{
        lvt=$1

        lvchange -ay $vg/$lvt

        mount "$DM_DEV_DIR/$vg/$lvt" "$mount_dir"
        diff pattern1 "$mount_dir/pattern1"
        dd if="$mount_dir/zeros2M" of=/dev/null bs=1M count=32
        umount "$mount_dir"

        lvchange -an $vg/$lvt
}

aux have_cache 1 10 0 || skip
which mkfs.xfs || skip

case $(cache_check -V) in
# support for v2 starts with version 0.7
0.[0-6]*) skip 'At least version 0.7 of cache_check tool is needed.' ;;
esac

mount_dir="mnt"
mkdir -p "$mount_dir"

# generate random data
dd if=/dev/urandom of=pattern1 bs=512K count=1

aux prepare_devs 4

vgcreate $SHARED $vg "$dev1" "$dev2" "$dev3" "$dev4"

lvcreate -n $lv1 -l 16 -an $vg "$dev1" "$dev4"
lvcreate -n $lv2 -l 4 -an $vg "$dev2"

#
# split when no devs are missing
# while inactive
# both cachemodes work the same
#

lvconvert -y --type cache --cachevol $lv2 --cachemode writethrough $vg/$lv1

check lv_field $vg/$lv1 segtype "cache"
check lv_field $vg/$lv1 cachemode "writethrough"

mkfs_mount_umount $lv1

lvconvert --splitcache $vg/$lv1
lvs -o segtype $vg/$lv1 | grep linear
lvs -o segtype $vg/$lv2 | grep linear

lvchange -ay $vg/$lv2
cache_check "$DM_DEV_DIR/$vg/$lv2"
lvchange -an $vg/$lv2

lvconvert -y --type cache --cachevol $lv2 --cachemode writeback $vg/$lv1

check lv_field $vg/$lv1 segtype "cache"
check lv_field $vg/$lv1 cachemode "writeback"

mkfs_mount_umount $lv1

lvconvert --splitcache $vg/$lv1
lvs -o segtype $vg/$lv1 | grep linear
lvs -o segtype $vg/$lv2 | grep linear

lvchange -ay $vg/$lv2
cache_check "$DM_DEV_DIR/$vg/$lv2"
lvchange -an $vg/$lv2

mount_umount $lv1


#
# split when no devs are missing
# while active
# both cachemodes work the same
#

lvconvert -y --type cache --cachevol $lv2 --cachemode writethrough $vg/$lv1

check lv_field $vg/$lv1 segtype "cache"
check lv_field $vg/$lv1 cachemode "writethrough"

mkfs_mount_umount $lv1

lvchange -ay $vg/$lv1

lvconvert --splitcache $vg/$lv1
lvs -o segtype $vg/$lv1 | grep linear
lvs -o segtype $vg/$lv2 | grep linear

lvchange -ay $vg/$lv2
cache_check "$DM_DEV_DIR/$vg/$lv2"
lvchange -an $vg/$lv2

mount_umount $lv1

lvconvert -y --type cache --cachevol $lv2 --cachemode writeback $vg/$lv1

check lv_field $vg/$lv1 segtype "cache"
check lv_field $vg/$lv1 cachemode "writeback"

lvchange -an $vg/$lv1

mkfs_mount_umount $lv1

lvchange -ay $vg/$lv1

lvconvert --splitcache $vg/$lv1
lvs -o segtype $vg/$lv1 | grep linear
lvs -o segtype $vg/$lv2 | grep linear

lvchange -ay $vg/$lv2
cache_check "$DM_DEV_DIR/$vg/$lv2"
lvchange -an $vg/$lv2

#
# split while cachevol is missing
# writethrough
#

lvconvert -y --type cache --cachevol $lv2 --cachemode writethrough $vg/$lv1

check lv_field $vg/$lv1 segtype "cache"
check lv_field $vg/$lv1 cachemode "writethrough"

lvchange -an $vg/$lv1

mkfs_mount_umount $lv1

lvchange -ay $vg/$lv1

aux disable_dev "$dev2"

lvconvert --splitcache $vg/$lv1

lvs -o segtype $vg/$lv1 | grep linear

aux enable_dev "$dev2"

lvs -o segtype $vg/$lv2 | grep linear

lvchange -ay --activationmode partial $vg/$lv2
cache_check "$DM_DEV_DIR/$vg/$lv2"
lvchange -an $vg/$lv2

vgck --updatemetadata $vg
lvs $vg
vgchange -an $vg
vgextend --restoremissing $vg "$dev2"

mount_umount $lv1

#
# split while cachevol is missing
# writeback
#

lvremove $vg/$lv2
lvcreate -n $lv2 -l 4 -an $vg "$dev2"

lvconvert -y --type cache --cachevol $lv2 --cachemode writeback $vg/$lv1

check lv_field $vg/$lv1 segtype "cache"
check lv_field $vg/$lv1 cachemode "writeback"

mkfs_mount_umount $lv1

aux disable_dev "$dev2"

not lvconvert --splitcache $vg/$lv1
lvconvert --splitcache --force --yes $vg/$lv1

lvs -o segtype $vg/$lv1 | grep linear

aux enable_dev "$dev2"

lvs -o segtype $vg/$lv2 | grep linear

lvchange -ay --activationmode partial $vg/$lv2
cache_check "$DM_DEV_DIR/$vg/$lv2"
lvchange -an $vg/$lv2

vgck --updatemetadata $vg
lvs $vg
vgchange -an $vg
vgextend --restoremissing $vg "$dev2"

#
# split while cachevol has 1 of 2 PVs
# writethrough
#

lvremove $vg/$lv2
lvcreate -n $lv2 -l 14 -an $vg "$dev2" "$dev3"

lvconvert -y --type cache --cachevol $lv2 --cachemode writethrough $vg/$lv1

check lv_field $vg/$lv1 segtype "cache"
check lv_field $vg/$lv1 cachemode "writethrough"

mkfs_mount_umount $lv1

aux disable_dev "$dev3"

lvconvert --splitcache $vg/$lv1

lvs -o segtype $vg/$lv1 | grep linear

aux enable_dev "$dev3"

lvs -o segtype $vg/$lv2 | grep linear

lvchange -ay --activationmode partial $vg/$lv2
cache_check "$DM_DEV_DIR/$vg/$lv2"
lvchange -an $vg/$lv2

vgck --updatemetadata $vg
lvs $vg
vgchange -an $vg
vgextend --restoremissing $vg "$dev3"

mount_umount $lv1

#
# split while cachevol has 1 of 2 PVs
# writeback
#

lvremove $vg/$lv2
lvcreate -n $lv2 -l 14 -an $vg "$dev2" "$dev3"

lvconvert -y --type cache --cachevol $lv2 --cachemode writeback $vg/$lv1

check lv_field $vg/$lv1 segtype "cache"
check lv_field $vg/$lv1 cachemode "writeback"

mkfs_mount_umount $lv1

aux disable_dev "$dev3"

not lvconvert --splitcache $vg/$lv1
lvconvert --splitcache --force --yes $vg/$lv1

lvs -o segtype $vg/$lv1 | grep linear

aux enable_dev "$dev3"

lvs -o segtype $vg/$lv2 | grep linear

lvchange -ay --activationmode partial $vg/$lv2
cache_check "$DM_DEV_DIR/$vg/$lv2"
lvchange -an $vg/$lv2

vgck --updatemetadata $vg
lvs $vg
vgchange -an $vg
vgextend --restoremissing $vg "$dev3"

#
# uncache when no devs are missing
# while inactive
# both cachemodes work the same
#

lvremove $vg/$lv1
lvremove $vg/$lv2

lvcreate -n $lv1 -l 16 -an $vg "$dev1" "$dev4"
lvcreate -n $lv2 -l 4 -an $vg "$dev2"

lvconvert -y --type cache --cachevol $lv2 --cachemode writethrough $vg/$lv1

mkfs_mount_umount $lv1

lvconvert --uncache $vg/$lv1
lvs -o segtype $vg/$lv1 | grep linear

lvcreate -n $lv2 -l 4 -an $vg "$dev2"

lvconvert -y --type cache --cachevol $lv2 --cachemode writeback $vg/$lv1

mkfs_mount_umount $lv1

lvconvert --uncache $vg/$lv1
lvs -o segtype $vg/$lv1 | grep linear

mount_umount $lv1

#
# uncache when no devs are missing
# while active
# both cachemodes work the same
#

lvremove $vg/$lv1

lvcreate -n $lv1 -l 16 -an $vg "$dev1" "$dev4"
lvcreate -n $lv2 -l 4 -an $vg "$dev2"

lvconvert -y --type cache --cachevol $lv2 --cachemode writethrough $vg/$lv1

mkfs_mount_umount $lv1

lvchange -ay $vg/$lv1

lvconvert --uncache $vg/$lv1
lvs -o segtype $vg/$lv1 | grep linear

lvcreate -n $lv2 -l 4 -an $vg "$dev2"

lvconvert -y --type cache --cachevol $lv2 --cachemode writeback $vg/$lv1

lvchange -an $vg/$lv1

mkfs_mount_umount $lv1

lvchange -ay $vg/$lv1

lvconvert --uncache $vg/$lv1
lvs -o segtype $vg/$lv1 | grep linear

mount_umount $lv1

#
# uncache while cachevol is missing
# writethrough
#

lvremove $vg/$lv1

lvcreate -n $lv1 -l 16 -an $vg "$dev1" "$dev4"
lvcreate -n $lv2 -l 4 -an $vg "$dev2"

lvconvert -y --type cache --cachevol $lv2 --cachemode writethrough $vg/$lv1

mkfs_mount_umount $lv1

aux disable_dev "$dev2"

lvconvert --uncache $vg/$lv1

lvs -o segtype $vg/$lv1 | grep linear

aux enable_dev "$dev2"

not lvs -o segtype $vg/$lv2

vgck --updatemetadata $vg
lvs $vg

vgchange -an $vg

mount_umount $lv1

#
# uncache while cachevol is missing
# writeback
#

lvremove $vg/$lv1

lvcreate -n $lv1 -l 16 -an $vg "$dev1" "$dev4"
lvcreate -n $lv2 -l 4 -an $vg "$dev2"

lvconvert -y --type cache --cachevol $lv2 --cachemode writeback $vg/$lv1

mkfs_mount_umount $lv1

aux disable_dev "$dev2"

not lvconvert --uncache $vg/$lv1
lvconvert --uncache --force --yes $vg/$lv1

lvs -o segtype $vg/$lv1 | grep linear

aux enable_dev "$dev2"

not lvs -o segtype $vg/$lv2

vgck --updatemetadata $vg
lvs $vg

vgremove -ff $vg
