#! /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
# fields enclosed by brackets "[]" replaced with your own identifying
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# $FreeBSD: releng/12.3/tests/sys/cddl/zfs/tests/reservation/reservation_005_pos.ksh 329867 2018-02-23 16:31:00Z asomers $

#
# Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
# Use is subject to license terms.
#
# ident	"@(#)reservation_005_pos.ksh	1.2	07/01/09 SMI"
#

. $STF_SUITE/include/libtest.kshlib
. $STF_SUITE/tests/reservation/reservation.kshlib

###############################################################################
#
# __stc_assertion_start
#
# ID: reservation_005_pos
#
# DESCRIPTION:
#
# When a reservation property of a filesystem, regular volume
# or sparse volume is set to 'none' the space previously consumed by the 
# reservation should be released back to the pool
#
# STRATEGY:
# 1) Create a filesystem, regular volume and sparse volume
# 2) Get the space used and available in the pool
# 3) Set a reservation on the filesystem less than the space available.
# 4) Verify that the 'reservation' property for the filesystem has
# the correct value.
# 5) Reset the reservation value back to zero (or 'none')
# 6) Verify that the space used and available totals for the pool have
# changed by the expected amounts (within tolerances).
# 7) Repeat steps 3-6 for a regular volume, sparse volume
#
# TESTABILITY: explicit
#
# TEST_AUTOMATION_LEVEL: automated
#
# CODING_STATUS: COMPLETED (2005-07-04)
#
# __stc_assertion_end
#
################################################################################

verify_runnable "both"

log_assert "Verify space released when reservation on a dataset is set "\
	"to 'none'"

space_avail=`get_prop available $TESTPOOL`

if ! is_global_zone ; then
	OBJ_LIST=""
else
	OBJ_LIST="$TESTPOOL/$TESTVOL $TESTPOOL/$TESTVOL2"
	(( vol_set_size = space_avail / 4 ))
	vol_set_size=$(floor_volsize $vol_set_size)
	(( sparse_vol_set_size = space_avail * 4 ))
	sparse_vol_set_size=$(floor_volsize $sparse_vol_set_size)
					

	log_must $ZFS create -V $vol_set_size $TESTPOOL/$TESTVOL
	log_must $ZFS set reservation=none $TESTPOOL/$TESTVOL
	log_must $ZFS create -s -V $sparse_vol_set_size $TESTPOOL/$TESTVOL2
fi

space_avail=`get_prop available $TESTPOOL`
space_used=`get_prop used $TESTPOOL`

# Calculate a large but valid reservation value.
resv_size_set=`expr $space_avail - $RESV_DELTA`

for obj in $TESTPOOL/$TESTFS $OBJ_LIST ; do

	#
        # For regular (non-sparse) volumes the upper limit is determined
        # not by the space available in the pool but rather by the size
        # of the volume itself.
        #
        [[ $obj == $TESTPOOL/$TESTVOL ]] && \
                (( resv_size_set = vol_set_size - RESV_DELTA ))

	log_must $ZFS set reservation=$resv_size_set $obj

	resv_size_get=`get_prop reservation $obj`
	if [[ $resv_size_set != $resv_size_get ]]; then
		log_fail "Reservation not the expected value "\
			"($resv_size_set != $resv_size_get)"
	fi

	log_must $ZFS set reservation=none $obj

	new_space_avail=`get_prop available $TESTPOOL`
	new_space_used=`get_prop used $TESTPOOL`

	log_must within_limits $space_used $new_space_used $RESV_TOLERANCE
	log_must within_limits $space_avail $new_space_avail $RESV_TOLERANCE
done

log_pass "Space correctly released when dataset reservation set to 'none'"
