#!/usr/bin/env bash

testdir=$(readlink -f $(dirname $0))
rootdir=$(readlink -f $testdir/../..)
source $rootdir/test/common/autotest_common.sh
source $rootdir/test/lvol/common.sh
source $rootdir/test/bdev/nbd_common.sh

function test_snapshot_compare_with_lvol_bdev() {
	malloc_name=$(rpc_cmd bdev_malloc_create $MALLOC_SIZE_MB $MALLOC_BS)
	lvs_uuid=$(rpc_cmd bdev_lvol_create_lvstore "$malloc_name" lvs_test)

	# Create two lvol bdevs
	lvol_size_mb=$(round_down $((LVS_DEFAULT_CAPACITY_MB / 6)))
	lvol_size=$((lvol_size_mb * 1024 * 1024))

	lvol_uuid1=$(rpc_cmd bdev_lvol_create -u "$lvs_uuid" lvol_test1 "$lvol_size_mb" -t)
	lvol_uuid2=$(rpc_cmd bdev_lvol_create -u "$lvs_uuid" lvol_test2 "$lvol_size_mb")

	# Fill thin provisioned lvol bdev with 50% of its space
	nbd_start_disks "$DEFAULT_RPC_ADDR" "$lvol_uuid1" /dev/nbd0
	count=$((lvol_size / LVS_DEFAULT_CLUSTER_SIZE / 2))
	dd if=/dev/urandom of=/dev/nbd0 oflag=direct bs="$LVS_DEFAULT_CLUSTER_SIZE" count=$count
	nbd_stop_disks "$DEFAULT_RPC_ADDR" /dev/nbd0
	# Fill whole thick provisioned lvol bdev
	nbd_start_disks "$DEFAULT_RPC_ADDR" "$lvol_uuid2" /dev/nbd0
	count=$((lvol_size / LVS_DEFAULT_CLUSTER_SIZE))
	dd if=/dev/urandom of=/dev/nbd0 oflag=direct bs="$LVS_DEFAULT_CLUSTER_SIZE" count=$count
	nbd_stop_disks "$DEFAULT_RPC_ADDR" /dev/nbd0

	# Create snapshots of lvol bdevs
	snapshot_uuid1=$(rpc_cmd bdev_lvol_snapshot lvs_test/lvol_test1 lvol_snapshot1)
	snapshot_uuid2=$(rpc_cmd bdev_lvol_snapshot lvs_test/lvol_test2 lvol_snapshot2)

	nbd_start_disks "$DEFAULT_RPC_ADDR" "$snapshot_uuid1" /dev/nbd0
	# Try to perform write operation on created snapshot
	# Check if filling snapshot of lvol bdev fails
	count=$((lvol_size / LVS_DEFAULT_CLUSTER_SIZE))
	dd if=/dev/urandom of=/dev/nbd0 oflag=direct bs="$LVS_DEFAULT_CLUSTER_SIZE" count=$count && false
	nbd_stop_disks "$DEFAULT_RPC_ADDR" /dev/nbd0

	# Declare nbd devices as vars for an easy cross-reference
	local lvol_nbd1=/dev/nbd0 lvol_nbd2=/dev/nbd1
	local snapshot_nbd1=/dev/nbd2 snapshot_nbd2=/dev/nbd3

	nbd_start_disks "$DEFAULT_RPC_ADDR" "$lvol_uuid1" "$lvol_nbd1"
	nbd_start_disks "$DEFAULT_RPC_ADDR" "$lvol_uuid2" "$lvol_nbd2"
	nbd_start_disks "$DEFAULT_RPC_ADDR" "$snapshot_uuid1" "$snapshot_nbd1"
	nbd_start_disks "$DEFAULT_RPC_ADDR" "$snapshot_uuid2" "$snapshot_nbd2"
	# Compare every lvol bdev with corresponding snapshot and check that data are the same
	cmp "$lvol_nbd1" "$snapshot_nbd1"
	cmp "$lvol_nbd2" "$snapshot_nbd2"

	# Fill second half of thin provisioned lvol bdev
	count=$((lvol_size / LVS_DEFAULT_CLUSTER_SIZE / 2))
	dd if=/dev/urandom of="$lvol_nbd1" oflag=direct seek=$count bs="$LVS_DEFAULT_CLUSTER_SIZE" count=$count

	# Compare thin provisioned lvol bdev with its snapshot and check if it fails
	cmp "$lvol_nbd1" "$snapshot_nbd1" && false

	# clean up
	for bdev in "${!lvol_nbd@}" "${!snapshot_nbd@}"; do
		nbd_stop_disks "$DEFAULT_RPC_ADDR" "${!bdev}"
	done

	rpc_cmd bdev_lvol_delete "$lvol_uuid1"
	rpc_cmd bdev_get_bdevs -b "$lvol_uuid1" && false
	rpc_cmd bdev_lvol_delete "$snapshot_uuid1"
	rpc_cmd bdev_get_bdevs -b "$snapshot_uuid1" && false
	rpc_cmd bdev_lvol_delete "$lvol_uuid2"
	rpc_cmd bdev_get_bdevs -b "$lvol_uuid2" && false
	rpc_cmd bdev_lvol_delete "$snapshot_uuid2"
	rpc_cmd bdev_get_bdevs -b "$snapshot_uuid2" && false
	rpc_cmd bdev_lvol_delete_lvstore -u "$lvs_uuid"
	rpc_cmd bdev_lvol_get_lvstores -u "$lvs_uuid" && false
	rpc_cmd bdev_malloc_delete "$malloc_name"
	check_leftover_devices
}

# Check that when writing to lvol bdev
# creating snapshot ends with success
function test_create_snapshot_with_io() {
	malloc_name=$(rpc_cmd bdev_malloc_create $MALLOC_SIZE_MB $MALLOC_BS)
	lvs_uuid=$(rpc_cmd bdev_lvol_create_lvstore "$malloc_name" lvs_test)

	# Create lvol bdev
	lvol_size_mb=$(round_down $((LVS_DEFAULT_CAPACITY_MB / 2)))
	lvol_size=$((lvol_size_mb * 1024 * 1024))

	lvol_uuid=$(rpc_cmd bdev_lvol_create -u "$lvs_uuid" lvol_test "$lvol_size_mb" -t)

	# Run fio in background that writes to lvol bdev
	nbd_start_disks "$DEFAULT_RPC_ADDR" "$lvol_uuid" /dev/nbd0
	run_fio_test /dev/nbd0 0 $lvol_size "write" "0xcc" "--time_based --runtime=16" &
	fio_proc=$!
	sleep 4
	# Create snapshot of lvol bdev
	snapshot_uuid=$(rpc_cmd bdev_lvol_snapshot lvs_test/lvol_test lvol_snapshot)
	wait $fio_proc

	# Clean up
	nbd_stop_disks "$DEFAULT_RPC_ADDR" /dev/nbd0
	rpc_cmd bdev_lvol_delete "$lvol_uuid"
	rpc_cmd bdev_get_bdevs -b "$lvol_uuid" && false
	rpc_cmd bdev_lvol_delete "$snapshot_uuid"
	rpc_cmd bdev_get_bdevs -b "$snapshot_uuid" && false
	rpc_cmd bdev_lvol_delete_lvstore -u "$lvs_uuid"
	rpc_cmd bdev_lvol_get_lvstores -u "$lvs_uuid" && false
	rpc_cmd bdev_malloc_delete "$malloc_name"
	check_leftover_devices
}

# Check that creating snapshot of snapshot will fail
function test_create_snapshot_of_snapshot() {
	malloc_name=$(rpc_cmd bdev_malloc_create $MALLOC_SIZE_MB $MALLOC_BS)
	lvs_uuid=$(rpc_cmd bdev_lvol_create_lvstore "$malloc_name" lvs_test)

	# Create lvol bdev
	lvol_size_mb=$(round_down $((LVS_DEFAULT_CAPACITY_MB / 3)))

	lvol_uuid=$(rpc_cmd bdev_lvol_create -u "$lvs_uuid" lvol_test "$lvol_size_mb")
	lvol=$(rpc_cmd bdev_get_bdevs -b "$lvol_uuid")

	# Create snapshots of lvol bdev
	snapshot_uuid=$(rpc_cmd bdev_lvol_snapshot lvs_test/lvol_test lvol_snapshot)

	# Create snapshot of previously created snapshot
	# and check if operation will fail
	rpc_cmd bdev_lvol_snapshot lvs_test/lvol_snapshot lvol_snapshot2 && false

	# Clean up
	rpc_cmd bdev_lvol_delete "$lvol_uuid"
	rpc_cmd bdev_get_bdevs -b "$lvol_uuid" && false
	rpc_cmd bdev_lvol_delete "$snapshot_uuid"
	rpc_cmd bdev_get_bdevs -b "$snapshot_uuid" && false
	rpc_cmd bdev_lvol_delete_lvstore -u "$lvs_uuid"
	rpc_cmd bdev_lvol_get_lvstores -u "$lvs_uuid" && false
	rpc_cmd bdev_malloc_delete "$malloc_name"
	check_leftover_devices
}

# Check if only clone of snapshot can be created.
# Check if writing to one clone doesn't affect other clone
# Check if relations between clones and snapshots are properly set in configuration
function test_clone_snapshot_relations() {
	malloc_name=$(rpc_cmd bdev_malloc_create $MALLOC_SIZE_MB $MALLOC_BS)
	lvs_uuid=$(rpc_cmd bdev_lvol_create_lvstore "$malloc_name" lvs_test)

	# Calculate size and create lvol bdev
	lvol_size_mb=$(round_down $((LVS_DEFAULT_CAPACITY_MB / 6)))
	lvol_size=$((lvol_size_mb * 1024 * 1024))

	lvol_uuid=$(rpc_cmd bdev_lvol_create -u "$lvs_uuid" lvol_test "$lvol_size_mb")
	lvol=$(rpc_cmd bdev_get_bdevs -b "$lvol_uuid")

	# Fill lvol bdev with 100% of its space
	nbd_start_disks "$DEFAULT_RPC_ADDR" "$lvol_uuid" /dev/nbd0
	run_fio_test /dev/nbd0 0 $lvol_size "write" "0xcc"
	nbd_stop_disks "$DEFAULT_RPC_ADDR" /dev/nbd0

	# An attempt to create a clone from lvol that is rw capable should fail
	rpc_cmd bdev_lvol_clone lvs_test/lvol_test clone_test && false

	# Create snapshots of lvol bdev
	snapshot_uuid=$(rpc_cmd bdev_lvol_snapshot lvs_test/lvol_test lvol_snapshot)

	# Create again clone of lvol bdev and check if it fails
	rpc_cmd bdev_lvol_clone lvs_test/lvol_test clone_test && false

	# Create two clones of snapshot and check if it ends with success
	clone_uuid1=$(rpc_cmd bdev_lvol_clone lvs_test/lvol_snapshot clone_test1)
	clone_uuid2=$(rpc_cmd bdev_lvol_clone lvs_test/lvol_snapshot clone_test2)

	# Perform write operation to first clone
	# Change first half of its space
	nbd_start_disks "$DEFAULT_RPC_ADDR" "$clone_uuid1" /dev/nbd0
	fill_size=$((lvol_size / 2))
	run_fio_test /dev/nbd0 0 $fill_size "write" "0xaa"

	# Compare snapshot with second clone. Data on both bdevs should be the same
	nbd_start_disks "$DEFAULT_RPC_ADDR" "$snapshot_uuid" /dev/nbd1
	nbd_start_disks "$DEFAULT_RPC_ADDR" "$clone_uuid2" /dev/nbd2
	sleep 1
	cmp /dev/nbd1 /dev/nbd2
	# Compare snapshot with first clone
	cmp /dev/nbd0 /dev/nbd1 && false

	snapshot_bdev=$(rpc_cmd bdev_get_bdevs -b "lvs_test/lvol_snapshot")
	clone_bdev1=$(rpc_cmd bdev_get_bdevs -b "lvs_test/clone_test1")
	clone_bdev2=$(rpc_cmd bdev_get_bdevs -b "lvs_test/lvol_test")

	# Check snapshot consistency
	[ "$(jq '.[].driver_specific.lvol.snapshot' <<< "$snapshot_bdev")" = "true" ]
	[ "$(jq '.[].driver_specific.lvol.clone' <<< "$snapshot_bdev")" = "false" ]
	[ "$(jq '.[].driver_specific.lvol.clones|sort' <<< "$snapshot_bdev")" = "$(jq '.|sort' <<< '["lvol_test", "clone_test1", "clone_test2"]')" ]

	# Check first clone consistency
	[ "$(jq '.[].driver_specific.lvol.snapshot' <<< "$clone_bdev1")" = "false" ]
	[ "$(jq '.[].driver_specific.lvol.clone' <<< "$clone_bdev1")" = "true" ]
	[ "$(jq '.[].driver_specific.lvol.base_snapshot' <<< "$clone_bdev1")" = '"lvol_snapshot"' ]

	# Check second clone consistency
	[ "$(jq '.[].driver_specific.lvol.snapshot' <<< "$clone_bdev2")" = "false" ]
	[ "$(jq '.[].driver_specific.lvol.clone' <<< "$clone_bdev2")" = "true" ]
	[ "$(jq '.[].driver_specific.lvol.base_snapshot' <<< "$clone_bdev2")" = '"lvol_snapshot"' ]

	# Destroy first clone and check if it is deleted from snapshot
	nbd_stop_disks "$DEFAULT_RPC_ADDR" /dev/nbd0
	rpc_cmd bdev_lvol_delete "$clone_uuid1"
	snapshot_bdev=$(rpc_cmd bdev_get_bdevs -b "lvs_test/lvol_snapshot")
	[ "$(jq '.[].driver_specific.lvol.clones|sort' <<< "$snapshot_bdev")" = "$(jq '.|sort' <<< '["lvol_test", "clone_test2"]')" ]

	# Clean up
	nbd_stop_disks "$DEFAULT_RPC_ADDR" /dev/nbd1
	nbd_stop_disks "$DEFAULT_RPC_ADDR" /dev/nbd2
	rpc_cmd bdev_lvol_delete "$lvol_uuid"
	rpc_cmd bdev_lvol_delete "$clone_uuid2"
	rpc_cmd bdev_lvol_delete "$snapshot_uuid"
	rpc_cmd bdev_lvol_delete_lvstore -u "$lvs_uuid"
	rpc_cmd bdev_malloc_delete "$malloc_name"
	check_leftover_devices
}

# Testing usage of bdev_lvol_inflate
function test_clone_inflate() {
	malloc_name=$(rpc_cmd bdev_malloc_create $MALLOC_SIZE_MB $MALLOC_BS)
	lvs_uuid=$(rpc_cmd bdev_lvol_create_lvstore "$malloc_name" lvs_test)

	# Calculate size and create lvol bdev
	lvol_size_mb=$(round_down $((LVS_DEFAULT_CAPACITY_MB / 4)))

	lvol_uuid=$(rpc_cmd bdev_lvol_create -u "$lvs_uuid" lvol_test "$lvol_size_mb")
	lvol=$(rpc_cmd bdev_get_bdevs -b "$lvol_uuid")

	# Fill lvol bdev with 100% of its space
	nbd_start_disks "$DEFAULT_RPC_ADDR" "$lvol_uuid" /dev/nbd0
	run_fio_test /dev/nbd0 0 $((lvol_size_mb * 1024 * 1024)) "write" "0xcc"
	nbd_stop_disks "$DEFAULT_RPC_ADDR" /dev/nbd0

	# Create snapshots of lvol bdev
	snapshot_uuid=$(rpc_cmd bdev_lvol_snapshot lvs_test/lvol_test lvol_snapshot)

	# Create clone of snapshot
	lvol=$(rpc_cmd bdev_get_bdevs -b "$lvol_uuid")
	[ "$(jq '.[].driver_specific.lvol.thin_provision' <<< "$lvol")" = "true" ]

	# Fill part of clone with data of known pattern
	nbd_start_disks "$DEFAULT_RPC_ADDR" "$lvol_uuid" /dev/nbd0
	first_fill=0
	second_fill=$((lvol_size_mb * 1024 * 1024 * 3 / 4))
	run_fio_test /dev/nbd0 $first_fill $((1024 * 1024)) "write" "0xdd"
	run_fio_test /dev/nbd0 $second_fill $((1024 * 1024)) "write" "0xdd"
	nbd_stop_disks "$DEFAULT_RPC_ADDR" /dev/nbd0

	# Do inflate
	rpc_cmd bdev_lvol_inflate lvs_test/lvol_test
	lvol=$(rpc_cmd bdev_get_bdevs -b "$lvol_uuid")
	[ "$(jq '.[].driver_specific.lvol.thin_provision' <<< "$lvol")" = "false" ]

	# Delete snapshot
	rpc_cmd bdev_lvol_delete "$snapshot_uuid"

	# Check data consistency
	nbd_start_disks "$DEFAULT_RPC_ADDR" "$lvol_uuid" /dev/nbd0
	run_fio_test /dev/nbd0 $first_fill $((1024 * 1024)) "read" "0xdd"
	run_fio_test /dev/nbd0 $(((first_fill + 1) * 1024 * 1024)) $((second_fill - 1024 * 1024)) "read" "0xcc"
	run_fio_test /dev/nbd0 $second_fill $((1024 * 1024)) "read" "0xdd"
	run_fio_test /dev/nbd0 $((second_fill + 1024 * 1024)) $((lvol_size_mb * 1024 * 1024 - (second_fill + 1024 * 1024))) "read" "0xcc"
	nbd_stop_disks "$DEFAULT_RPC_ADDR" /dev/nbd0

	# Clean up
	rpc_cmd bdev_lvol_delete "$lvol_uuid"
	rpc_cmd bdev_lvol_delete_lvstore -u "$lvs_uuid"
	rpc_cmd bdev_malloc_delete "$malloc_name"
	check_leftover_devices
}

# Create chain of snapshot<-snapshot2<-lvol_test lvol bdevs.
# Decouple lvol_test twice and delete the remaining snapshot lvol.
# Each time check consistency of snapshot-clone relations and written data.
function test_clone_decouple_parent() {
	malloc_name=$(rpc_cmd bdev_malloc_create $MALLOC_SIZE_MB $MALLOC_BS)
	lvs_uuid=$(rpc_cmd bdev_lvol_create_lvstore "$malloc_name" lvs_test)

	# Calculate size and create lvol bdev
	lvol_size_mb=$((5 * LVS_DEFAULT_CLUSTER_SIZE_MB))
	lvol_uuid=$(rpc_cmd bdev_lvol_create -u "$lvs_uuid" lvol_test "$lvol_size_mb" -t)
	lvol=$(rpc_cmd bdev_get_bdevs -b "$lvol_uuid")

	# Decouple_parent should fail on lvol bdev without a parent
	rpc_cmd bdev_lvol_decouple_parent lvs_test/lvol_test && false

	# Fill first four out of 5 clusters of clone with data of known pattern
	nbd_start_disks "$DEFAULT_RPC_ADDR" "$lvol_uuid" /dev/nbd0
	begin_fill=0
	end_fill=$((lvol_size_mb * 4 * 1024 * 1024 / 5))
	run_fio_test /dev/nbd0 $begin_fill $end_fill "write" "0xdd"

	# Create snapshot (snapshot<-lvol_bdev)
	snapshot_uuid=$(rpc_cmd bdev_lvol_snapshot lvs_test/lvol_test lvol_snapshot)

	# Fill second and fourth cluster of clone with data of known pattern
	start_fill=$((lvol_size_mb * 1024 * 1024 / 5))
	fill_range=$start_fill
	run_fio_test /dev/nbd0 $start_fill $fill_range "write" "0xcc"
	start_fill=$((lvol_size_mb * 3 * 1024 * 1024 / 5))
	run_fio_test /dev/nbd0 $start_fill $fill_range "write" "0xcc"

	# Create snapshot (snapshot<-snapshot2<-lvol_bdev)
	snapshot_uuid2=$(rpc_cmd bdev_lvol_snapshot lvs_test/lvol_test lvol_snapshot2)

	# Fill second cluster of clone with data of known pattern
	start_fill=$fill_range
	run_fio_test /dev/nbd0 $start_fill $fill_range "write" "0xee"

	# Check data consistency
	pattern=("0xdd" "0xee" "0xdd" "0xcc" "0x00")
	for i in "${!pattern[@]}"; do
		start_fill=$((lvol_size_mb * i * 1024 * 1024 / 5))
		run_fio_test /dev/nbd0 $start_fill $fill_range "read" "${pattern[i]}"
	done

	# Decouple_parent of lvol bdev resulting in two relation chains:
	#  - snapshot<-lvol_bdev
	#  - snapshot<-snapshot2
	rpc_cmd bdev_lvol_decouple_parent lvs_test/lvol_test
	lvol=$(rpc_cmd bdev_get_bdevs -b "$lvol_uuid")
	snapshot=$(rpc_cmd bdev_get_bdevs -b "$snapshot_uuid")
	snapshot2=$(rpc_cmd bdev_get_bdevs -b "$snapshot_uuid2")
	[ "$(jq '.[].driver_specific.lvol.thin_provision' <<< "$lvol")" = "true" ]
	[ "$(jq '.[].driver_specific.lvol.clone' <<< "$lvol")" = "true" ]
	[ "$(jq '.[].driver_specific.lvol.snapshot' <<< "$lvol")" = "false" ]
	[ "$(jq '.[].driver_specific.lvol.clone' <<< "$snapshot")" = "false" ]
	[ "$(jq '.[].driver_specific.lvol.clone' <<< "$snapshot2")" = "true" ]
	[ "$(jq '.[].driver_specific.lvol.snapshot' <<< "$snapshot2")" = "true" ]

	# Delete second snapshot
	rpc_cmd bdev_lvol_delete "$snapshot_uuid2"

	# Check data consistency
	for i in "${!pattern[@]}"; do
		start_fill=$((lvol_size_mb * i * 1024 * 1024 / 5))
		run_fio_test /dev/nbd0 $start_fill $fill_range "read" "${pattern[i]}"
	done

	# Decouple_parent of lvol bdev again resulting in two relation chains:
	#  - lvol_bdev
	#  - snapshot<-snapshot2
	rpc_cmd bdev_lvol_decouple_parent lvs_test/lvol_test
	lvol=$(rpc_cmd bdev_get_bdevs -b "$lvol_uuid")
	snapshot=$(rpc_cmd bdev_get_bdevs -b "$snapshot_uuid")
	[ "$(jq '.[].driver_specific.lvol.thin_provision' <<< "$lvol")" = "true" ]
	[ "$(jq '.[].driver_specific.lvol.clone' <<< "$lvol")" = "false" ]
	[ "$(jq '.[].driver_specific.lvol.snapshot' <<< "$lvol")" = "false" ]
	[ "$(jq '.[].driver_specific.lvol.clone' <<< "$snapshot")" = "false" ]

	# Delete first snapshot
	rpc_cmd bdev_lvol_delete "$snapshot_uuid"

	# Check data consistency
	for i in "${!pattern[@]}"; do
		start_fill=$((lvol_size_mb * i * 1024 * 1024 / 5))
		run_fio_test /dev/nbd0 $start_fill $fill_range "read" "${pattern[i]}"
	done

	# Clean up
	rpc_cmd bdev_lvol_delete "$lvol_uuid"
	rpc_cmd bdev_lvol_delete_lvstore -u "$lvs_uuid"
	rpc_cmd bdev_malloc_delete "$malloc_name"
	check_leftover_devices
}

# Set lvol bdev as read only and perform clone on it.
function test_lvol_bdev_readonly() {
	malloc_name=$(rpc_cmd bdev_malloc_create $MALLOC_SIZE_MB $MALLOC_BS)
	lvs_uuid=$(rpc_cmd bdev_lvol_create_lvstore "$malloc_name" lvs_test)

	# Calculate size and create lvol bdev
	lvol_size_mb=$(round_down $((LVS_DEFAULT_CAPACITY_MB / 2)))

	lvol_uuid=$(rpc_cmd bdev_lvol_create -u "$lvs_uuid" lvol_test "$lvol_size_mb")
	lvol=$(rpc_cmd bdev_get_bdevs -b "$lvol_uuid")

	# Set lvol bdev as read only
	rpc_cmd bdev_lvol_set_read_only lvs_test/lvol_test

	# Try to perform write operation on lvol marked as read only
	nbd_start_disks "$DEFAULT_RPC_ADDR" "$lvol_uuid" /dev/nbd0
	run_fio_test /dev/nbd0 0 $lvol_size "write" "0xcc" && false
	nbd_stop_disks "$DEFAULT_RPC_ADDR" /dev/nbd0

	# Create clone of lvol set to read only
	clone_uuid=$(rpc_cmd bdev_lvol_clone lvs_test/lvol_test clone_test)

	# Try to perform write operation on lvol clone
	nbd_start_disks "$DEFAULT_RPC_ADDR" "$clone_uuid" /dev/nbd0
	run_fio_test /dev/nbd0 0 $lvol_size "write" "0xcc"
	nbd_stop_disks "$DEFAULT_RPC_ADDR" /dev/nbd0

	# Clean up
	rpc_cmd bdev_lvol_delete "$clone_uuid"
	rpc_cmd bdev_lvol_delete "$lvol_uuid"
	rpc_cmd bdev_lvol_delete_lvstore -u "$lvs_uuid"
	rpc_cmd bdev_malloc_delete "$malloc_name"
	check_leftover_devices
}

# Check if it is possible to delete snapshot with clone
function test_delete_snapshot_with_clone() {
	malloc_name=$(rpc_cmd bdev_malloc_create $MALLOC_SIZE_MB $MALLOC_BS)
	lvs_uuid=$(rpc_cmd bdev_lvol_create_lvstore "$malloc_name" lvs_test)

	# Calculate size and create lvol bdev
	lvol_size_mb=$(round_down $((LVS_DEFAULT_CAPACITY_MB / 2)))
	lvol_size=$((lvol_size_mb * 1024 * 1024))

	lvol_uuid=$(rpc_cmd bdev_lvol_create -u "$lvs_uuid" lvol_test "$lvol_size_mb")
	lvol=$(rpc_cmd bdev_get_bdevs -b "$lvol_uuid")

	# Perform write operation on lvol
	nbd_start_disks "$DEFAULT_RPC_ADDR" "$lvol_uuid" /dev/nbd0
	run_fio_test /dev/nbd0 0 $lvol_size "write" "0xcc"

	# Create snapshots of lvol bdev
	snapshot_uuid=$(rpc_cmd bdev_lvol_snapshot lvs_test/lvol_test lvol_snapshot)

	# Fill first half of lvol bdev
	half_size=$((lvol_size / 2 - 1))
	run_fio_test /dev/nbd0 0 $half_size "write" "0xee"

	# Check if snapshot was unchanged
	nbd_start_disks "$DEFAULT_RPC_ADDR" "$snapshot_uuid" /dev/nbd1
	run_fio_test /dev/nbd1 0 $half_size "read" "0xcc"

	# Verify lvol bdev
	run_fio_test /dev/nbd0 0 $half_size "read" "0xee"
	lvol=$(rpc_cmd bdev_get_bdevs -b "$lvol_uuid")
	[ "$(jq '.[].driver_specific.lvol.clone' <<< "$lvol")" = "true" ]

	# Delete snapshot - should succeed
	nbd_stop_disks "$DEFAULT_RPC_ADDR" /dev/nbd1
	rpc_cmd bdev_lvol_delete "$snapshot_uuid"

	# Check data consistency
	lvol=$(rpc_cmd bdev_get_bdevs -b "$lvol_uuid")
	[ "$(jq '.[].driver_specific.lvol.clone' <<< "$lvol")" = "false" ]
	run_fio_test /dev/nbd0 0 $half_size "read" "0xee"
	run_fio_test /dev/nbd0 $((half_size + 1)) $half_size "read" "0xcc"

	# Clean up
	nbd_stop_disks "$DEFAULT_RPC_ADDR" /dev/nbd0
	rpc_cmd bdev_lvol_delete "$lvol_uuid"
	rpc_cmd bdev_lvol_delete_lvstore -u "$lvs_uuid"
	rpc_cmd bdev_malloc_delete "$malloc_name"
	check_leftover_devices
}

# Check if it is possible to delete snapshot with one snapshot on it
function test_delete_snapshot_with_snapshot() {
	malloc_name=$(rpc_cmd bdev_malloc_create $MALLOC_SIZE_MB $MALLOC_BS)
	lvs_uuid=$(rpc_cmd bdev_lvol_create_lvstore "$malloc_name" lvs_test)

	# Calculate size and create lvol bdev
	lvol_size_mb=$(round_down $((LVS_DEFAULT_CAPACITY_MB / 5)))
	lvol_size=$((lvol_size_mb * 1024 * 1024))

	lvol_uuid=$(rpc_cmd bdev_lvol_create -u "$lvs_uuid" lvol_test "$lvol_size_mb")
	lvol=$(rpc_cmd bdev_get_bdevs -b "$lvol_uuid")

	# Perform write operation on lvol
	nbd_start_disks "$DEFAULT_RPC_ADDR" "$lvol_uuid" /dev/nbd0
	run_fio_test /dev/nbd0 0 $lvol_size "write" "0xcc"

	# Create snapshot of lvol bdev
	snapshot_uuid=$(rpc_cmd bdev_lvol_snapshot lvs_test/lvol_test lvol_snapshot)
	lvol=$(rpc_cmd bdev_get_bdevs -b "$lvol_uuid")
	[ "$(jq '.[].driver_specific.lvol.base_snapshot' <<< "$lvol")" = '"lvol_snapshot"' ]

	# Fill second 1/3 of lvol bdev
	first_part=$((lvol_size / 3))
	second_part=$((lvol_size * 2 / 3))
	run_fio_test /dev/nbd0 $first_part $((second_part - first_part)) "write" "0xee"

	# Check if snapshot was unchanged
	nbd_start_disks "$DEFAULT_RPC_ADDR" "$snapshot_uuid" /dev/nbd1
	run_fio_test /dev/nbd1 0 $lvol_size "read" "0xcc"

	# Create second snapshot of lvol_bdev
	# First snapshot becomes snapshot of second snapshot
	snapshot_uuid2=$(rpc_cmd bdev_lvol_snapshot lvs_test/lvol_test lvol_snapshot2)
	lvol=$(rpc_cmd bdev_get_bdevs -b "$lvol_uuid")
	snapshot=$(rpc_cmd bdev_get_bdevs -b "$snapshot_uuid")
	snapshot2=$(rpc_cmd bdev_get_bdevs -b "$snapshot_uuid2")
	[ "$(jq '.[].driver_specific.lvol.base_snapshot' <<< "$snapshot2")" = '"lvol_snapshot"' ]
	[ "$(jq '.[].driver_specific.lvol.clones|sort' <<< "$snapshot2")" = "$(jq '.|sort' <<< '["lvol_test"]')" ]
	[ "$(jq '.[].driver_specific.lvol.clone' <<< "$snapshot2")" = "true" ]
	[ "$(jq '.[].driver_specific.lvol.snapshot' <<< "$snapshot2")" = "true" ]
	[ "$(jq '.[].driver_specific.lvol.clones|sort' <<< "$snapshot")" = "$(jq '.|sort' <<< '["lvol_snapshot2"]')" ]

	# Verify snapshots
	run_fio_test /dev/nbd1 0 $size "read" "0xcc"
	nbd_start_disks "$DEFAULT_RPC_ADDR" "$snapshot_uuid2" /dev/nbd2
	run_fio_test /dev/nbd2 0 $((first_part - 1)) "read" "0xcc"
	run_fio_test /dev/nbd2 $first_part $((second_part - first_part)) "read" "0xee"
	run_fio_test /dev/nbd2 $second_part $((lvol_size - second_part)) "read" "0xcc"

	# Verify lvol bdev
	run_fio_test /dev/nbd0 $first_part $((second_part - first_part)) "read" "0xee"
	run_fio_test /dev/nbd0 $second_part $((lvol_size - second_part)) "read" "0xcc"
	[ "$(jq '.[].driver_specific.lvol.clone' <<< "$lvol")" = "true" ]
	[ "$(jq '.[].driver_specific.lvol.base_snapshot' <<< "$lvol")" = '"lvol_snapshot2"' ]

	# Fill third part of lvol bdev
	run_fio_test /dev/nbd0 $second_part $((lvol_size - second_part)) "write" "0xdd"

	# Verify snapshots
	run_fio_test /dev/nbd1 0 $size "read" "0xcc"
	run_fio_test /dev/nbd0 $second_part $((lvol_size - second_part)) "read" "0xdd"
	nbd_stop_disks "$DEFAULT_RPC_ADDR" /dev/nbd2
	nbd_stop_disks "$DEFAULT_RPC_ADDR" /dev/nbd1

	# Delete snapshot - should succeed
	rpc_cmd bdev_lvol_delete "$snapshot_uuid2"

	# Check data consistency
	lvol=$(rpc_cmd bdev_get_bdevs -b "$lvol_uuid")
	snapshot=$(rpc_cmd bdev_get_bdevs -b "$snapshot_uuid")
	[ "$(jq '.[].driver_specific.lvol.clone' <<< "$lvol")" = "true" ]
	[ "$(jq '.[].driver_specific.lvol.base_snapshot' <<< "$lvol")" = '"lvol_snapshot"' ]
	[ "$(jq '.[].driver_specific.lvol.clones|sort' <<< "$snapshot")" = "$(jq '.|sort' <<< '["lvol_test"]')" ]
	run_fio_test /dev/nbd0 $first_part $((second_part - first_part)) "read" "0xee"
	run_fio_test /dev/nbd0 $second_part $((lvol_size - second_part)) "read" "0xdd"

	# Clean up
	nbd_stop_disks "$DEFAULT_RPC_ADDR" /dev/nbd0
	rpc_cmd bdev_lvol_delete "$snapshot_uuid"
	rpc_cmd bdev_lvol_delete "$lvol_uuid"
	rpc_cmd bdev_lvol_delete_lvstore -u "$lvs_uuid"
	rpc_cmd bdev_malloc_delete "$malloc_name"
	check_leftover_devices
}

# Test for destroying lvol bdevs in particular order.
function test_bdev_lvol_delete_ordering() {
	local snapshot_name=snapshot snapshot_uuid
	local clone_name=clone clone_uuid

	local bdev_uuid
	local lbd_name=lbd_test
	local lvstore_uuid lvstore_name=lvs_name
	local malloc_dev
	local size

	malloc_dev=$(rpc_cmd bdev_malloc_create 256 "$MALLOC_BS")
	lvstore_uuid=$(rpc_cmd bdev_lvol_create_lvstore "$malloc_dev" "$lvstore_name")

	get_lvs_jq bdev_lvol_get_lvstores -u "$lvstore_uuid"
	[[ ${jq_out["uuid"]} == "$lvstore_uuid" ]]
	[[ ${jq_out["name"]} == "$lvstore_name" ]]
	[[ ${jq_out["base_bdev"]} == "$malloc_dev" ]]

	size=$((jq_out["free_clusters"] * jq_out["cluster_size"] / 4 / 1024 ** 2))

	bdev_uuid=$(rpc_cmd bdev_lvol_create -t -u "$lvstore_uuid" "$lbd_name" "$size")

	get_bdev_jq bdev_get_bdevs -b "$bdev_uuid"

	snapshot_uuid=$(rpc_cmd bdev_lvol_snapshot "${jq_out["name"]}" "$snapshot_name")

	get_bdev_jq bdev_get_bdevs -b "$lvstore_name/$snapshot_name"
	[[ ${jq_out["name"]} == "$snapshot_uuid" ]]
	[[ ${jq_out["product_name"]} == "Logical Volume" ]]
	[[ ${jq_out["aliases[0]"]} == "$lvstore_name/$snapshot_name" ]]

	clone_uuid=$(rpc_cmd bdev_lvol_clone "$lvstore_name/$snapshot_name" "$clone_name")

	get_bdev_jq bdev_get_bdevs -b "$lvstore_name/$clone_name"
	[[ ${jq_out["name"]} == "$clone_uuid" ]]
	[[ ${jq_out["product_name"]} == "Logical Volume" ]]
	[[ ${jq_out["aliases[0]"]} == "$lvstore_name/$clone_name" ]]

	# Try to destroy snapshot with clones and check if it fails
	rpc_cmd bdev_lvol_delete "$snapshot_uuid" && false

	# cleanup logical volumes
	rpc_cmd bdev_lvol_delete "$bdev_uuid"
	rpc_cmd bdev_lvol_delete "$clone_uuid"
	rpc_cmd bdev_lvol_delete "$snapshot_uuid"

	# cleanup lvstore
	rpc_cmd bdev_lvol_delete_lvstore -u "$lvstore_uuid"

	# cleanup malloc dev
	rpc_cmd bdev_malloc_delete "$malloc_dev"

	check_leftover_devices
}

$SPDK_BIN_DIR/spdk_tgt &
spdk_pid=$!
trap 'killprocess "$spdk_pid"; exit 1' SIGINT SIGTERM EXIT
waitforlisten $spdk_pid
modprobe nbd

run_test "test_snapshot_compare_with_lvol_bdev" test_snapshot_compare_with_lvol_bdev
run_test "test_create_snapshot_with_io" test_create_snapshot_with_io
run_test "test_create_snapshot_of_snapshot" test_create_snapshot_of_snapshot
run_test "test_clone_snapshot_relations" test_clone_snapshot_relations
run_test "test_clone_inflate" test_clone_inflate
run_test "test_clone_decouple_parent" test_clone_decouple_parent
run_test "test_lvol_bdev_readonly" test_lvol_bdev_readonly
run_test "test_delete_snapshot_with_clone" test_delete_snapshot_with_clone
run_test "test_delete_snapshot_with_snapshot" test_delete_snapshot_with_snapshot
run_test "test_bdev_lvol_delete_ordering" test_bdev_lvol_delete_ordering

trap - SIGINT SIGTERM EXIT
killprocess $spdk_pid
