#!/usr/bin/ksh

#
# This file and its contents are supplied under the terms of the
# Common Development and Distribution License ("CDDL"), version 1.0.
# You may only use this file in accordance with the terms of version
# 1.0 of the CDDL.
#
# A full copy of the text of the CDDL should have accompanied this
# source.  A copy of the CDDL is also available via the Internet at
# http://www.illumos.org/license/CDDL.
#

#
# Copyright (c) 2016 by Delphix. All rights reserved.
#

. $STF_SUITE/include/libtest.shlib
. $STF_SUITE/tests/functional/cli_root/zpool_import/zpool_import.cfg

#
# Prototype cleanup function for zpool_import tests.
#
function cleanup
{
	# clear any remaining zinjections
	log_must zinject -c all > /dev/null

	destroy_pool $TESTPOOL1

	log_must rm -f $CPATH $CPATHBKP $CPATHBKP2 $MD5FILE $MD5FILE2

	log_must rm -rf $DEVICE_DIR/*
	typeset i=0
	while (( i < $MAX_NUM )); do
		log_must mkfile $FILE_SIZE ${DEVICE_DIR}/${DEVICE_FILE}$i
		((i += 1))
	done
}

#
# Write a bit of data and sync several times.
# This function is intended to be used by zpool rewind tests.
#
function sync_some_data_a_few_times
{
	typeset pool=$1
	typeset -i a_few_times=${2:-10}

	typeset file="/$pool/tmpfile"
	for i in {0..$a_few_times}; do
		dd if=/dev/urandom of=${file}_$i bs=128k count=10
		sync
	done

	return 0
}

#
# Just write a moderate amount of data to the pool.
#
function write_some_data
{
	typeset pool=$1
	typeset files10mb=${2:-10}

	typeset ds="$pool/fillerds"
	zfs create $ds
	[[ $? -ne 0 ]] && return 1

	# Create 100 MB of data
	typeset file="/$ds/fillerfile"
	for i in {1..$files10mb}; do
		dd if=/dev/urandom of=$file.$i bs=128k count=80
		[[ $? -ne 0 ]] && return 1
	done

	return 0
}

#
# Create/overwrite a few datasets with files.
# Apply md5sum on all the files and store checksums in a file.
#
# newdata: overwrite existing files if false.
# md5file: file where to store md5sums
# datasetname: base name for datasets
#
function _generate_data_common
{
	typeset pool=$1
	typeset newdata=$2
	typeset md5file=$3
	typeset datasetname=$4

	typeset -i datasets=3
	typeset -i files=5
	typeset -i blocks=10

	[[ -n $md5file ]] && rm -f $md5file
	for i in {1..$datasets}; do
		( $newdata ) && log_must zfs create "$pool/$datasetname$i"
		for j in {1..$files}; do
			typeset file="/$pool/$datasetname$i/file$j"
			dd if=/dev/urandom of=$file bs=128k count=$blocks > /dev/null
			[[ -n $md5file ]] && md5sum $file >> $md5file
		done
		( $newdata ) && sync
	done

	return 0
}

function generate_data
{
	typeset pool=$1
	typeset md5file="$2"
	typeset datasetname=${3:-ds}

	_generate_data_common $pool true "$md5file" $datasetname
}

function overwrite_data
{
	typeset pool=$1
	typeset md5file="$2"
	typeset datasetname=${3:-ds}

	_generate_data_common $1 false "$md5file" $datasetname
}

#
# Verify md5sums of every file in md5sum file $1.
#
function verify_data_md5sums
{
	typeset md5file=$1

	if [[ ! -f $md5file ]]; then
		log_note "md5 sums file '$md5file' doesn't exist"
		return 1
	fi

	md5sum -c --quiet $md5file
	return $?
}

#
# Set devices size in DEVICE_DIR to $1.
#
function increase_device_sizes
{
	typeset newfilesize=$1

	typeset -i i=0
	while (( i < $MAX_NUM )); do
		log_must mkfile $newfilesize ${DEVICE_DIR}/${DEVICE_FILE}$i
		((i += 1))
	done
}

#
# Translate vdev names returned by zpool status into more generic names.
#
# eg: mirror-2 --> mirror
#
function _translate_vdev
{
	typeset vdev=$1

	typeset keywords="mirror replacing raidz1 raidz2 raidz3 indirect"
	for word in $keywords; do
		echo $vdev | egrep "^${word}-[0-9]+\$" > /dev/null
		if [[ $? -eq 0 ]]; then
			vdev=$word
			break
		fi
	done

	[[ $vdev == "logs" ]] && echo "log" && return 0
	[[ $vdev == "raidz1" ]] && echo "raidz" && return 0

	echo $vdev
	return 0
}

#
# Check that pool configuration returned by zpool status matches expected
# configuration. Format for the check string is same as the vdev arguments for
# creating a pool
# Add -q for quiet mode.
#
# eg: check_pool_config pool1 "mirror c0t0d0s0 c0t1d0s0 log c1t1d0s0"
#
function check_pool_config
{
	typeset logfailure=true
	if [[ $1 == '-q' ]]; then
		logfailure=false
		shift
	fi

	typeset poolname=$1
	typeset expected=$2

	typeset status
	status=$(zpool status $poolname 2>&1)
	if [[ $? -ne 0 ]]; then
		if ( $logfailure ); then
			log_note "zpool status $poolname failed: $status"
		fi
		return 1
	fi

	typeset actual=""
	typeset began=false
	printf "$status\n" | while read line; do
		typeset vdev=$(echo "$line" | awk '{printf $1}')
		if ( ! $began ) && [[ $vdev == NAME ]]; then
			began=true
			continue
		fi
		( $began ) && [[ -z $vdev ]] && break;

		if ( $began ); then
			[[ -z $actual ]] && actual="$vdev" && continue
			vdev=$(_translate_vdev $vdev)
			actual="$actual $vdev"
		fi
	done

	expected="$poolname $expected"

	if [[ "$actual" != "$expected" ]]; then
		if ( $logfailure ); then
			log_note "expected pool vdevs:"
			log_note "> '$expected'"
			log_note "actual pool vdevs:"
			log_note "> '$actual'"
		fi
		return 1
	fi

	return 0
}

#
# Check that pool configuration returned by zpool status matches expected
# configuration within a given timeout in seconds. See check_pool_config().
#
# eg: wait_for_pool_config pool1 "mirror c0t0d0s0 c0t1d0s0" 60
#
function wait_for_pool_config
{
	typeset poolname=$1
	typeset expectedconfig="$2"
	typeset -i timeout=${3:-60}

	timeout=$(( $timeout + $(date +%s) ))

	while  (( $(date +%s) < $timeout )); do
		check_pool_config -q $poolname "$expectedconfig"
		[[ $? -eq 0 ]] && return 0
		sleep 3
	done

	check_pool_config $poolname "$expectedconfig"
	return $?
}

#
# Check that pool status is ONLINE
#
function check_pool_healthy
{
	typeset pool=$1

	typeset status
	status=$(zpool status $pool 2>&1)
	if [[ $? -ne 0 ]]; then
		log_note "zpool status $pool failed: $status"
		return 1
	fi

	status=$(echo "$status" | grep "$pool" | grep -v "pool:" | \
	    awk '{print $2}')

	if [[ $status != "ONLINE" ]]; then
		log_note "Invalid zpool status for '$pool': '$status'" \
		    "!= 'ONLINE'"
		return 1
	fi

	return 0
}

#
# Return 0 if a device is currently being replaced in the pool.
#
function pool_is_replacing
{
	typeset pool=$1

	zpool status $pool | grep "replacing" | grep "ONLINE" > /dev/null

	return $?
}

function set_vdev_validate_skip
{
	mdb_set_uint32 "vdev_validate_skip" "$1"
}

function get_zfs_txg_timeout
{
	echo $(mdb_get_uint32 "zfs_txg_timeout")
}

function set_zfs_txg_timeout
{
	mdb_set_uint32 "zfs_txg_timeout" "$1"
}

function set_spa_load_verify_metadata
{
	mdb_set_uint32 "spa_load_verify_metadata" "$1"
}

function set_spa_load_verify_data
{
	mdb_set_uint32 "spa_load_verify_data" "$1"
}

function set_zfs_max_missing_tvds
{
	mdb_set_uint32 "zfs_max_missing_tvds" "$1"
}

#
# Use mdb to find the last txg that was synced in an active pool.
#
function get_last_txg_synced
{
	typeset pool=$1

	if is_linux; then
		txg=$(tail "/proc/spl/kstat/zfs/$pool/txgs" |
		    awk '$3=="C" {print $1}' | tail -1)
		[[ "$txg" ]] || txg=0
		echo $txg
		return 0
	fi

	typeset spas
	spas=$(mdb -k -e "::spa")
	[[ $? -ne 0 ]] && return 1

	typeset spa=""
	print "$spas\n" | while read line; do
		typeset poolname=$(echo "$line" | awk '{print $3}')
		typeset addr=$(echo "$line" | awk '{print $1}')
		if [[ $poolname == $pool ]]; then
			spa=$addr
			break
		fi
	done
	if [[ -z $spa ]]; then
		log_fail "Couldn't find pool '$pool'"
		return 1
	fi
	typeset mdbcmd="$spa::print spa_t spa_ubsync.ub_txg | ::eval '.=E'"
	typeset -i txg
	txg=$(mdb -k -e "$mdbcmd")
	[[ $? -ne 0 ]] && return 1

	echo $txg
	return 0
}