#!/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 http://www.opensolaris.org/os/licensing.
# See the License for the specific language governing permissions
# and limitations under the License.
#
# 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
# fields enclosed by brackets "[]" replaced with your own identifying
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# CDDL HEADER END
#

#
# Copyright 2007 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

#
# DESCRIPTION:
#	A snapshot already exists with the new name, then none of the
#	snapshots is renamed.
#
# STRATEGY:
#	1. Create snapshot for a set of datasets.
#	2. Create a new snapshot for one of datasets.
#	3. Using rename -r command with exists snapshot name.
#	4. Verify none of the snapshots is renamed.
#

verify_runnable "both"

function cleanup
{
	typeset snaps=$(zfs list -H -t snapshot -o name)
	typeset exclude
	typeset snap
	typeset pool_name

	if [[ -n $KEEP ]]; then
		exclude=`eval echo \"'(${KEEP})'\"`
	fi

	for snap in $snaps; do
		pool_name=$(echo "$snap" | awk -F/ '{print $1}')
		if [[ -n $exclude ]]; then
			echo "$pool_name" | egrep -v "$exclude" > /dev/null 2>&1
			if [[ $? -eq 0 ]]; then
				log_must zfs destroy $snap
			fi
		else
			log_must zfs destroy $snap
		fi
	done
}

log_assert "zfs rename -r failed, when snapshot name is already existing."
log_onexit cleanup

set -A datasets $TESTPOOL		$TESTPOOL/$TESTCTR \
	$TESTPOOL/$TESTCTR/$TESTFS1	$TESTPOOL/$TESTFS
if is_global_zone; then
	datasets[${#datasets[@]}]=$TESTPOOL/$TESTVOL
fi

log_must zfs snapshot -r ${TESTPOOL}@snap
typeset -i i=0
while ((i < ${#datasets[@]})); do
	# Create one more snapshot
	log_must zfs snapshot ${datasets[$i]}@snap2
	log_mustnot zfs rename -r ${TESTPOOL}@snap ${TESTPOOL}@snap2
	log_must zfs destroy ${datasets[$i]}@snap2

	# Check datasets, make sure none of them was renamed.
	typeset -i j=0
	while ((j < ${#datasets[@]})); do
		if datasetexists ${datasets[$j]}@snap2 ; then
			log_fail "${datasets[$j]}@snap2 should not exist."
		fi
		((j += 1))
	done

	((i += 1))
done

log_pass "zfs rename -r failed, when snapshot name is already existing passed."