#!/usr/bin/env ksh
set -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
# information: Portions Copyright [yyyy] [name of copyright owner]
#
# CDDL HEADER END
#

#
# Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
# Use is subject to license terms.
#

#
# Copyright (c) 2013 by Delphix. All rights reserved.
#

. $STF_SUITE/include/libtest.shlib
. $STF_SUITE/tests/functional/reservation/reservation.shlib

#
# DESCRIPTION:
#
# Reservation values cannot exceed the amount of space available
# in the pool. Verify that attempting to set a reservation greater
# than this value fails.
#
# STRATEGY:
# 1) Create a filesystem, regular and sparse volume
# 2) Get the space available in the pool
# 3) Attempt to set a reservation greater than the available space
# on the filesystem and verify it fails.
# 4) Verify that the reservation is still set to 'none' (or 0) on
# the filesystem.
# 5) Repeat 3-4 for regular and sparse volume
#

verify_runnable "both"

function cleanup
{
	for obj in $OBJ_LIST; do
		destroy_dataset -f $obj
	done

	log_must zero_reservation $TESTPOOL/$TESTFS
}

log_onexit cleanup

log_assert "Reservation values cannot exceed the amount of space" \
	" available in the pool"

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

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

	space_avail=`get_prop available $TESTPOOL`
	resv_size_set=`expr $space_avail + $RESV_DELTA`

	#
	# 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 zero_reservation $obj
	log_mustnot $ZFS set reservation=$resv_size_set $obj

	resv_size_get=`get_prop reservation $obj`

	if (($resv_size_get != 0)); then
		log_fail "Reservation value non-zero ($resv_size_get)"
	fi
done

log_pass "Attempting to set too large reservation failed as expected"
