#!/bin/ksh -p
#
# CDDL HEADER START
#
# The contents of this file are subject to the terms of the
# Common Development and Distribution License (the "License").
# You may not use this file except in compliance with the License.
#
# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
# or https://opensource.org/licenses/CDDL-1.0.
# See the License for the specific language governing permissions
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# When distributing Covered Code, include this CDDL HEADER in each
# file and include the License file at usr/src/OPENSOLARIS.LICENSE.
# If applicable, add the following below this CDDL HEADER, with the
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#
# Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
# Use is subject to license terms.
#

#
# Copyright (c) 2012, 2016 by Delphix. All rights reserved.
#

. $STF_SUITE/include/libtest.shlib
. $STF_SUITE/tests/functional/cli_root/zfs_set/zfs_set_common.kshlib

#
# DESCRIPTION:
# While canmount=noauto and  the dataset is mounted,
# zfs must not attempt to unmount it.
#
# STRATEGY:
# 1. Setup a pool and create fs, volume, snapshot clone within it.
# 2. Set canmount=noauto for each dataset and check the return value
#    and check if it still can not be unmounted when the dataset is mounted
#

verify_runnable "both"

set -A dataset_pos "$TESTPOOL/$TESTFS" "$TESTPOOL/$TESTCLONE"

function cleanup
{
	i=0
	cd $pwd
	while (( i < ${#dataset_pos[*]} )); do
		ds=${dataset_pos[i]}
		if datasetexists $ds; then
			log_must zfs set mountpoint=${old_mnt[i]} $ds
			log_must zfs set canmount=${old_canmount[i]} $ds
		fi
		(( i = i + 1 ))
	done

	ds=$TESTPOOL/$TESTCLONE
	if datasetexists $ds; then
		mntp=$(get_prop mountpoint $ds)
		destroy_dataset $ds
		if [[ -d $mntp ]]; then
			log_must rm -fr $mntp
		fi
	fi

	snapexists $TESTPOOL/$TESTFS@$TESTSNAP && \
		destroy_dataset $TESTPOOL/$TESTFS@$TESTSNAP -R

	zfs unmount -a > /dev/null 2>&1
	log_must zfs mount -a
}

log_assert "While canmount=noauto and  the dataset is mounted,"\
		" zfs must not attempt to unmount it"
log_onexit cleanup

set -A old_mnt
set -A old_canmount
typeset ds
typeset pwd=$PWD

log_must zfs snapshot $TESTPOOL/$TESTFS@$TESTSNAP
log_must zfs clone $TESTPOOL/$TESTFS@$TESTSNAP $TESTPOOL/$TESTCLONE

typeset -i i=0
while (( i < ${#dataset_pos[*]} )); do
	ds=${dataset_pos[i]}
	old_mnt[i]=$(get_prop mountpoint $ds)
	old_canmount[i]=$(get_prop canmount $ds)
	(( i = i + 1 ))
done

i=0
while (( i < ${#dataset_pos[*]} )); do
	dataset=${dataset_pos[i]}
	if ismounted $dataset; then
		log_must cd ${old_mnt[i]}
		set_n_check_prop "noauto" "canmount" "$dataset"
		log_must mounted $dataset
	fi
	(( i = i + 1 ))
done

log_pass "Setting canmount=noauto to filesystem while dataset busy pass."
