1#! /usr/local/bin/ksh93 -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# ident "@(#)reservation_008_pos.ksh 1.3 09/08/06 SMI" 28# 29 30. $STF_SUITE/include/libtest.kshlib 31. $STF_SUITE/tests/reservation/reservation.kshlib 32 33############################################################################### 34# 35# __stc_assertion_start 36# 37# ID: reservation_008_pos 38# 39# DESCRIPTION: 40# 41# Setting a reservation reserves a defined minimum amount of space for 42# a dataset, and prevents other datasets using that space. Verify that 43# reducing the reservation on a filesystem allows other datasets in 44# the pool to use that space. 45# 46# STRATEGY: 47# 1) Create multiple filesystems 48# 2) Set reservations on all bar one of the filesystems 49# 3) Fill up the one non-reserved filesystem 50# 4) Reduce one of the reservations and verify can write more 51# data into the non-reserved filesystem 52# 53# TESTABILITY: explicit 54# 55# TEST_AUTOMATION_LEVEL: automated 56# 57# CODING_STATUS: COMPLETED (2005-07-04) 58# 59# __stc_assertion_end 60# 61################################################################################ 62 63verify_runnable "both" 64 65log_assert "Verify reducing reservation allows other datasets to use space" 66 67log_must create_multiple_fs $RESV_NUM_FS $TESTPOOL/$TESTFS $TESTDIR 68 69space_avail=`get_prop available $TESTPOOL` 70space_used=`get_prop used $TESTPOOL` 71 72# 73# To make sure this test doesn't take too long to execute on 74# large pools, we calculate a reservation setting which when 75# applied to all bar one of the filesystems (RESV_NUM_FS-1) will 76# ensure we have RESV_FREE_SPACE left free in the pool, which we will 77# be able to quickly fill. 78# 79resv_space_avail=`expr $space_avail - $RESV_FREE_SPACE` 80num_resv_fs=`expr $RESV_NUM_FS - 1` # Number of FS to which resv will be applied 81resv_size_set=`expr $resv_space_avail / $num_resv_fs` 82 83# 84# We set the reservations now, rather than when we created the filesystems 85# to allow us to take into account space used by the filsystem metadata 86# 87# Note we don't set a reservation on the first filesystem we created, 88# hence num=1 rather than zero below. 89# 90typeset -i num=1 91while (( $num < $RESV_NUM_FS )); do 92 log_must $ZFS set reservation=$resv_size_set $TESTPOOL/$TESTFS$num 93 (( num = num + 1 )) 94done 95 96space_avail_still=`get_prop available $TESTPOOL` 97 98fill_size=`expr $space_avail_still + $RESV_TOLERANCE` 99write_count=`expr $fill_size / $BLOCK_SIZE` 100 101# Now fill up the first filesystem (which doesn't have a reservation set 102# and thus will use up whatever free space is left in the pool). 103num=0 104log_note "Writing to $TESTDIR$num/$TESTFILE1" 105 106$FILE_WRITE -o create -f $TESTDIR$num/$TESTFILE1 -b $BLOCK_SIZE \ 107 -c $write_count -d 0 108ret=$? 109if (( $ret != $ENOSPC )); then 110 log_fail "Did not get ENOSPC as expected (got $ret)." 111fi 112 113# Remove the reservation on one of the other filesystems and verify 114# can write more data to the original non-reservation filesystem. 115num=1 116log_must $ZFS set reservation=none $TESTPOOL/${TESTFS}$num 117num=0 118log_must $FILE_WRITE -o create -f ${TESTDIR}$num/$TESTFILE2 -b $BLOCK_SIZE \ 119 -c 1000 -d 0 120 121log_pass "reducing reservation allows other datasets to use space" 122