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#!/usr/bin/bash -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, 2016 by Delphix. All rights reserved.
#
. $STF_SUITE/include/libtest.shlib
. $STF_SUITE/tests/functional/reservation/reservation.shlib
#
# DESCRIPTION:
#
# In pool with a full filesystem and a regular volume (with implicit
# reservation) destroying the volume should allow more data to be written
# to the filesystem
#
#
# STRATEGY:
# 1) Create a regular (non-sparse) volume
# 2) Create a filesystem at the same level
# 3) Fill up the filesystem
# 4) Destroy the volume
# 5) Verify can write more data to the filesystem
#
verify_runnable "global"
log_assert "Destroying a regular volume with reservation allows more data to" \
" be written to top level filesystem"
function cleanup
{
datasetexists $TESTPOOL/$TESTVOL && \
log_must zfs destroy $TESTPOOL/$TESTVOL
[[ -e $TESTDIR/$TESTFILE1 ]] && log_must rm -rf $TESTDIR/$TESTFILE1
[[ -e $TESTDIR/$TESTFILE2 ]] && log_must rm -rf $TESTDIR/$TESTFILE2
}
log_onexit cleanup
space_avail=$(largest_volsize_from_pool $TESTPOOL)
#
# To make sure this test doesn't take too long to execute on
# large pools, we calculate a volume size which will ensure we
# have RESV_FREE_SPACE left free in the pool.
#
((vol_set_size = space_avail - RESV_FREE_SPACE))
vol_set_size=$(floor_volsize $vol_set_size)
# Creating a regular volume implicitly sets its reservation
# property to the same value.
log_must zfs create -V $vol_set_size $TESTPOOL/$TESTVOL
space_avail_still=$(get_prop available $TESTPOOL)
fill_size=$((space_avail_still + $RESV_TOLERANCE))
write_count=$((fill_size / BLOCK_SIZE))
# Now fill up the filesystem (which doesn't have a reservation set
# and thus will use up whatever free space is left in the pool).
file_write -o create -f $TESTDIR/$TESTFILE1 -b $BLOCK_SIZE -c $write_count -d 0
ret=$?
if (($ret != $ENOSPC)); then
log_fail "Did not get ENOSPC as expected (got $ret)."
fi
log_must zfs destroy -f $TESTPOOL/$TESTVOL
log_must file_write -o create -f $TESTDIR/$TESTFILE2 -b pagesize \
-c 1000 -d 0
log_pass "Destroying volume with reservation allows more data to be written " \
"to top level filesystem"
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