1#!/usr/bin/bash -p 2# 3# CDDL HEADER START 4# 5# The contents of this file are subject to the terms of the 6# Common Development and Distribution License (the "License"). 7# You may not use this file except in compliance with the License. 8# 9# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10# or http://www.opensolaris.org/os/licensing. 11# See the License for the specific language governing permissions 12# and limitations under the License. 13# 14# When distributing Covered Code, include this CDDL HEADER in each 15# file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16# If applicable, add the following below this CDDL HEADER, with the 17# fields enclosed by brackets "[]" replaced with your own identifying 18# information: Portions Copyright [yyyy] [name of copyright owner] 19# 20# CDDL HEADER END 21# 22 23# 24# Copyright 2009 Sun Microsystems, Inc. All rights reserved. 25# Use is subject to license terms. 26# 27 28# 29# Copyright (c) 2013 by Delphix. All rights reserved. 30# 31 32. $STF_SUITE/include/libtest.shlib 33. $STF_SUITE/tests/functional/reservation/reservation.shlib 34 35# 36# DESCRIPTION: 37# 38# Setting a reservation reserves a defined minimum amount of space for 39# a dataset, and prevents other datasets using that space. Verify that 40# reducing the reservation on a filesystem allows other datasets in 41# the pool to use that space. 42# 43# STRATEGY: 44# 1) Create multiple filesystems 45# 2) Set reservations on all bar one of the filesystems 46# 3) Fill up the one non-reserved filesystem 47# 4) Reduce one of the reservations and verify can write more 48# data into the non-reserved filesystem 49# 50 51verify_runnable "both" 52 53log_assert "Verify reducing reservation allows other datasets to use space" 54 55function cleanup 56{ 57 typeset -i loop=0 58 while (($loop < $RESV_NUM_FS)); do 59 datasetexists $TESTPOOL/${TESTFS}$loop && \ 60 log_must $ZFS destroy -f $TESTPOOL/${TESTFS}$loop 61 62 [[ -d ${TESTDIR}$loop ]] && log_must $RM -r ${TESTDIR}$loop 63 64 ((loop = loop + 1)) 65 done 66} 67 68log_onexit cleanup 69 70log_must create_multiple_fs $RESV_NUM_FS $TESTPOOL/$TESTFS $TESTDIR 71 72space_avail=`get_prop available $TESTPOOL` 73space_used=`get_prop used $TESTPOOL` 74 75# 76# To make sure this test doesn't take too long to execute on 77# large pools, we calculate a reservation setting which when 78# applied to all bar one of the filesystems (RESV_NUM_FS-1) will 79# ensure we have RESV_FREE_SPACE left free in the pool, which we will 80# be able to quickly fill. 81# 82resv_space_avail=`expr $space_avail - $RESV_FREE_SPACE` 83num_resv_fs=`expr $RESV_NUM_FS - 1` # Number of FS to which resv will be applied 84resv_size_set=`expr $resv_space_avail / $num_resv_fs` 85 86# 87# We set the reservations now, rather than when we created the filesystems 88# to allow us to take into account space used by the filsystem metadata 89# 90# Note we don't set a reservation on the first filesystem we created, 91# hence num=1 rather than zero below. 92# 93typeset -i num=1 94while (($num < $RESV_NUM_FS)); do 95 log_must $ZFS set reservation=$resv_size_set $TESTPOOL/$TESTFS$num 96 ((num = num + 1)) 97done 98 99space_avail_still=`get_prop available $TESTPOOL` 100 101fill_size=`expr $space_avail_still + $RESV_TOLERANCE` 102write_count=`expr $fill_size / $BLOCK_SIZE` 103 104# Now fill up the first filesystem (which doesn't have a reservation set 105# and thus will use up whatever free space is left in the pool). 106num=0 107log_note "Writing to $TESTDIR$num/$TESTFILE1" 108 109$FILE_WRITE -o create -f $TESTDIR$num/$TESTFILE1 -b $BLOCK_SIZE \ 110 -c $write_count -d 0 111ret=$? 112if (($ret != $ENOSPC)); then 113 log_fail "Did not get ENOSPC as expected (got $ret)." 114fi 115 116# Remove the reservation on one of the other filesystems and verify 117# can write more data to the original non-reservation filesystem. 118num=1 119log_must $ZFS set reservation=none $TESTPOOL/${TESTFS}$num 120num=0 121log_must $FILE_WRITE -o create -f ${TESTDIR}$num/$TESTFILE2 -b $PAGESIZE \ 122 -c 1000 -d 0 123 124log_pass "reducing reservation allows other datasets to use space" 125