#!/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 256
check sysfs "$(< SCSI_DEBUG_DEV)" queue/logical_block_size "512"
check sysfs "$(< SCSI_DEBUG_DEV)" queue/physical_block_size "512"
aux prepare_devs 2 64

# Tests with fs block sizes require a libblkid version that shows BLOCK_SIZE
vgcreate $vg "$dev1"
lvcreate -n $lv1 -L50 $vg
mkfs.xfs -f "$DM_DEV_DIR/$vg/$lv1"
blkid -c /dev/null "$DM_DEV_DIR/$vg/$lv1" | grep BLOCK_SIZE || skip
lvchange -an $vg
vgremove -ff $vg

# scsi_debug devices with 512 LBS and 4K PBS
#aux prepare_scsi_debug_dev 256 sector_size=512 physblk_exp=3
#check sysfs "$(< SCSI_DEBUG_DEV)" queue/logical_block_size "512"
#check sysfs "$(< SCSI_DEBUG_DEV)" queue/physical_block_size "4096"
#aux prepare_devs 2 64

# loop devs with 512 LBS and 512 PBS
#dd if=/dev/zero of=loopa bs=$((1024*1024)) count=64 2> /dev/null
#dd if=/dev/zero of=loopb bs=$((1024*1024)) count=64 2> /dev/null
#LOOP1=$(losetup -f loopa --show)
#LOOP2=$(losetup -f loopb --show)
#aux extend_filter "a|$LOOP1|"
#aux extend_filter "a|$LOOP2|"
#aux lvmconf 'devices/scan = "/dev"'
#dev1=$LOOP1
#dev2=$LOOP2

# loop devs with 4096 LBS and 4096 PBS
#dd if=/dev/zero of=loopa bs=$((1024*1024)) count=64 2> /dev/null
#dd if=/dev/zero of=loopb bs=$((1024*1024)) count=64 2> /dev/null
#LOOP1=$(losetup -f loopa --sector-size 4096 --show)
#LOOP2=$(losetup -f loopb --sector-size 4096 --show)
#aux extend_filter "a|$LOOP1|"
#aux extend_filter "a|$LOOP2|"
#aux lvmconf 'devices/scan = "/dev"'
#dev1=$LOOP1
#dev2=$LOOP2

# the default is brd ram devs with 512 LBS 4K PBS
# aux prepare_devs 2 64

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"

blockdev --getss "$dev1"
blockdev --getpbsz "$dev1"
blockdev --getss "$dev2"
blockdev --getpbsz "$dev2"

# Test attach while inactive, detach while inactive
# create fs on LV before writecache is attached

lvcreate -n $lv1 -l 8 -an $vg "$dev1"
lvcreate -n $lv2 -l 4 -an $vg "$dev2"
lvchange -ay $vg/$lv1
_add_new_data_to_mnt
umount $mnt
lvchange -an $vg/$lv1
lvconvert --yes --type writecache --cachevol $lv2 $vg/$lv1
check lv_field $vg/$lv1 segtype writecache
lvs -a $vg/${lv2}_cvol --noheadings -o segtype >out
grep linear out
lvchange -ay $vg/$lv1
blockdev --getss "$DM_DEV_DIR/$vg/$lv1"
blockdev --getpbsz "$DM_DEV_DIR/$vg/$lv1"
mount "$DM_DEV_DIR/$vg/$lv1" $mnt
_add_more_data_to_mnt
_verify_data_on_mnt
_verify_more_data_on_mnt
umount $mnt
lvchange -an $vg/$lv1
lvconvert --splitcache $vg/$lv1
check lv_field $vg/$lv1 segtype linear
check lv_field $vg/$lv2 segtype linear
lvchange -ay $vg/$lv1
blockdev --getss "$DM_DEV_DIR/$vg/$lv1"
blockdev --getpbsz "$DM_DEV_DIR/$vg/$lv1"
lvchange -an $vg/$lv1
_verify_data_on_lv
lvchange -an $vg/$lv2
lvremove $vg/$lv1
lvremove $vg/$lv2

# Test attach while inactive, detach while inactive
# create fs on LV after writecache is attached

lvcreate -n $lv1 -l 8 -an $vg "$dev1"
lvcreate -n $lv2 -l 4 -an $vg "$dev2"
lvconvert --yes --type writecache --cachevol $lv2 $vg/$lv1
check lv_field $vg/$lv1 segtype writecache
lvs -a $vg/${lv2}_cvol --noheadings -o segtype >out
grep linear out
lvchange -ay $vg/$lv1
blockdev --getss "$DM_DEV_DIR/$vg/$lv1"
blockdev --getpbsz "$DM_DEV_DIR/$vg/$lv1"
_add_new_data_to_mnt
umount $mnt
lvchange -an $vg/$lv1
lvconvert --splitcache $vg/$lv1
lvchange -ay $vg/$lv1
blockdev --getss "$DM_DEV_DIR/$vg/$lv1"
blockdev --getpbsz "$DM_DEV_DIR/$vg/$lv1"
mount "$DM_DEV_DIR/$vg/$lv1" $mnt
_add_more_data_to_mnt
_verify_data_on_mnt
_verify_more_data_on_mnt
umount $mnt
lvchange -an $vg/$lv1
_verify_data_on_lv
lvremove $vg/$lv1
lvremove $vg/$lv2

# Test attach while active, detach while active

lvcreate -n $lv1 -l 8 -an $vg "$dev1"
lvcreate -n $lv2 -l 4 -an $vg "$dev2"
lvchange -ay $vg/$lv1
_add_new_data_to_mnt
lvconvert --yes --type writecache --cachevol $lv2 $vg/$lv1
blockdev --getss "$DM_DEV_DIR/$vg/$lv1"
blockdev --getpbsz "$DM_DEV_DIR/$vg/$lv1"
_add_more_data_to_mnt
_verify_data_on_mnt
lvconvert --splitcache $vg/$lv1
check lv_field $vg/$lv1 segtype linear
check lv_field $vg/$lv2 segtype linear
blockdev --getss "$DM_DEV_DIR/$vg/$lv1"
blockdev --getpbsz "$DM_DEV_DIR/$vg/$lv1"
_verify_data_on_mnt
_verify_more_data_on_mnt
umount $mnt
lvchange -an $vg/$lv1
lvchange -an $vg/$lv2
_verify_data_on_lv
lvremove $vg/$lv1
lvremove $vg/$lv2

# Test attach while active, detach while active,
# skip cleaner so flush message is used instead
lvcreate -n $lv1 -l 8 -an $vg "$dev1"
lvcreate -n $lv2 -l 4 -an $vg "$dev2"
lvchange -ay $vg/$lv1
_add_new_data_to_mnt
lvconvert --yes --type writecache --cachevol $lv2 $vg/$lv1
blockdev --getss "$DM_DEV_DIR/$vg/$lv1"
blockdev --getpbsz "$DM_DEV_DIR/$vg/$lv1"
_add_more_data_to_mnt
_verify_data_on_mnt
lvconvert --splitcache --cachesettings cleaner=0 $vg/$lv1
check lv_field $vg/$lv1 segtype linear
check lv_field $vg/$lv2 segtype linear
blockdev --getss "$DM_DEV_DIR/$vg/$lv1"
blockdev --getpbsz "$DM_DEV_DIR/$vg/$lv1"
_verify_data_on_mnt
_verify_more_data_on_mnt
umount $mnt
lvchange -an $vg/$lv1
lvchange -an $vg/$lv2
_verify_data_on_lv
lvremove $vg/$lv1
lvremove $vg/$lv2
 
vgremove -ff $vg