#! /usr/local/bin/ksh93 -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
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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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# $FreeBSD: releng/12.3/tests/sys/cddl/zfs/tests/snapshot/rollback_003_pos.ksh 329867 2018-02-23 16:31:00Z asomers $

#
# Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
# Use is subject to license terms.
#
# ident	"@(#)rollback_003_pos.ksh	1.6	09/08/06 SMI"
#
. $STF_SUITE/include/libtest.kshlib
. $STF_SUITE/tests/cli_root/zfs_rollback/zfs_rollback_common.kshlib


################################################################################
#
# __stc_assertion_start
#
# ID: rollback_003_pos
#
# DESCRIPTION:
# Verify that rollbacks succeed when there are nested file systems.
#
# STRATEGY:
# 1) Snapshot an empty file system and rollback
# 2) Create a file in the file system
# 3) Rollback the file system to empty
# 4) Create a nested file system with the same name as the file created in (2)
# 5) Verify a rollback succeeds
#
# TESTABILITY: explicit
#
# TEST_AUTOMATION_LEVEL: automated
#
# CODING_STATUS: COMPLETED (2006-01-17)
#
# __stc_assertion_end
#
################################################################################

verify_runnable "both"

function cleanup
{
	typeset snap=""
	typeset fs=""

	log_must $ZFS mount -a

	for snap in "$SNAPPOOL.1" "$SNAPPOOL"
	do
		snapexists $snap
		[[ $? -eq 0 ]] && \
			log_must $ZFS destroy $snap
	done
	
	for fs in "$TESTPOOL/$TESTFILE/$TESTFILE.1" "$TESTPOOL/$TESTFILE"
	do
		datasetexists $fs
		[[ $? -eq 0 ]] && \
			log_must $ZFS destroy -r $fs
	done

	[[ -e /$TESTPOOL ]] && \
		log_must $RM -rf $TESTPOOL/*
}

log_assert "Verify rollback succeeds when there are nested file systems."

log_onexit cleanup

log_must $ZFS snapshot $SNAPPOOL
log_must $ZFS rollback $SNAPPOOL
log_mustnot $ZFS snapshot $SNAPPOOL

log_must $TOUCH /$TESTPOOL/$TESTFILE

log_must $ZFS rollback $SNAPPOOL
log_must $ZFS create $TESTPOOL/$TESTFILE

log_must $ZFS rollback $SNAPPOOL

log_note "Verify rollback of multiple nested file systems succeeds."
log_must $ZFS snapshot $TESTPOOL/$TESTFILE@$TESTSNAP
log_must $ZFS snapshot $SNAPPOOL.1

unmount_all_safe > /dev/null 2>&1
log_must $ZFS mount -a

log_must $TOUCH /$TESTPOOL/$TESTFILE/$TESTFILE.1

log_must $ZFS rollback $SNAPPOOL.1

log_pass "Rollbacks succeed when nested file systems are present."
