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#!/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
# information: Portions Copyright [yyyy] [name of copyright owner]
#
# CDDL HEADER END
#
#
# Copyright 2009 Sun Microsystems, Inc. All rights reserved.
# Use is subject to license terms.
#
#
# Copyright (c) 2013, 2016 by Delphix. All rights reserved.
#
. $STF_SUITE/include/libtest.shlib
. $STF_SUITE/tests/functional/refreserv/refreserv.cfg
#
# DESCRIPTION:
# Setting full size as refreservation, verify no snapshot can be created.
#
# STRATEGY:
# 1. Setting full size as refreservation on pool
# 2. Verify no snapshot can be created on this pool
# 3. Setting full size as refreservation on filesystem
# 4. Verify no snapshot can be created on it and its subfs
#
verify_runnable "both"
function cleanup
{
if is_global_zone ; then
log_must zfs set refreservation=none $TESTPOOL
if datasetexists $TESTPOOL@snap ; then
log_must zfs destroy -f $TESTPOOL@snap
fi
fi
log_must zfs destroy -rf $TESTPOOL/$TESTFS
log_must zfs create $TESTPOOL/$TESTFS
log_must zfs set mountpoint=$TESTDIR $TESTPOOL/$TESTFS
}
# This function iteratively increases refreserv to its highest possible
# value. Simply setting refreserv == quota can allow enough writes to
# complete that the test fails.
function max_refreserv
{
typeset ds=$1
typeset -i incsize=131072
typeset -i rr=$(get_prop available $ds)
log_must zfs set refreserv=$rr $ds
while :; do
zfs set refreserv=$((rr + incsize)) $ds >/dev/null 2>&1
if [[ $? == 0 ]]; then
((rr += incsize))
continue
else
((incsize /= 2))
((incsize == 0)) && break
fi
done
}
log_assert "Setting full size as refreservation, verify no snapshot " \
"can be created."
log_onexit cleanup
log_must zfs create $TESTPOOL/$TESTFS/subfs
typeset datasets
if is_global_zone; then
datasets="$TESTPOOL $TESTPOOL/$TESTFS $TESTPOOL/$TESTFS/subfs"
else
datasets="$TESTPOOL/$TESTFS $TESTPOOL/$TESTFS/subfs"
fi
for ds in $datasets; do
#
# Verify refreservation on dataset
#
log_must zfs set quota=25M $ds
max_refreserv $ds
log_mustnot zfs snapshot $ds@snap
if datasetexists $ds@snap ; then
log_fail "ERROR: $ds@snap should not exists."
fi
log_must zfs set quota=none $ds
log_must zfs set refreservation=none $ds
done
log_pass "Setting full size as refreservation, verify no snapshot " \
"can be created."
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