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# $FreeBSD$ 24 25# 26# Copyright 2009 Sun Microsystems, Inc. All rights reserved. 27# Use is subject to license terms. 28# 29# ident "@(#)reservation_008_pos.ksh 1.3 09/08/06 SMI" 30# 31 32. $STF_SUITE/include/libtest.kshlib 33. $STF_SUITE/tests/reservation/reservation.kshlib 34 35############################################################################### 36# 37# __stc_assertion_start 38# 39# ID: reservation_008_pos 40# 41# DESCRIPTION: 42# 43# Setting a reservation reserves a defined minimum amount of space for 44# a dataset, and prevents other datasets using that space. Verify that 45# reducing the reservation on a filesystem allows other datasets in 46# the pool to use that space. 47# 48# STRATEGY: 49# 1) Create multiple filesystems 50# 2) Set reservations on all bar one of the filesystems 51# 3) Fill up the one non-reserved filesystem 52# 4) Reduce one of the reservations and verify can write more 53# data into the non-reserved filesystem 54# 55# TESTABILITY: explicit 56# 57# TEST_AUTOMATION_LEVEL: automated 58# 59# CODING_STATUS: COMPLETED (2005-07-04) 60# 61# __stc_assertion_end 62# 63################################################################################ 64 65verify_runnable "both" 66 67log_assert "Verify reducing reservation allows other datasets to use space" 68 69log_must create_multiple_fs $RESV_NUM_FS $TESTPOOL/$TESTFS $TESTDIR 70 71space_avail=`get_prop available $TESTPOOL` 72space_used=`get_prop used $TESTPOOL` 73 74# 75# To make sure this test doesn't take too long to execute on 76# large pools, we calculate a reservation setting which when 77# applied to all bar one of the filesystems (RESV_NUM_FS-1) will 78# ensure we have RESV_FREE_SPACE left free in the pool, which we will 79# be able to quickly fill. 80# 81resv_space_avail=`expr $space_avail - $RESV_FREE_SPACE` 82num_resv_fs=`expr $RESV_NUM_FS - 1` # Number of FS to which resv will be applied 83resv_size_set=`expr $resv_space_avail / $num_resv_fs` 84 85# 86# We set the reservations now, rather than when we created the filesystems 87# to allow us to take into account space used by the filsystem metadata 88# 89# Note we don't set a reservation on the first filesystem we created, 90# hence num=1 rather than zero below. 91# 92typeset -i num=1 93while (( $num < $RESV_NUM_FS )); do 94 log_must $ZFS set reservation=$resv_size_set $TESTPOOL/$TESTFS$num 95 (( num = num + 1 )) 96done 97 98space_avail_still=`get_prop available $TESTPOOL` 99 100fill_size=`expr $space_avail_still + $RESV_TOLERANCE` 101write_count=`expr $fill_size / $BLOCK_SIZE` 102 103# Now fill up the first filesystem (which doesn't have a reservation set 104# and thus will use up whatever free space is left in the pool). 105num=0 106log_note "Writing to $TESTDIR$num/$TESTFILE1" 107 108$FILE_WRITE -o create -f $TESTDIR$num/$TESTFILE1 -b $BLOCK_SIZE \ 109 -c $write_count -d 0 110ret=$? 111if (( $ret != $ENOSPC )); then 112 log_fail "Did not get ENOSPC as expected (got $ret)." 113fi 114 115# Remove the reservation on one of the other filesystems and verify 116# can write more data to the original non-reservation filesystem. 117num=1 118log_must $ZFS set reservation=none $TESTPOOL/${TESTFS}$num 119num=0 120log_must $FILE_WRITE -o create -f ${TESTDIR}$num/$TESTFILE2 -b $BLOCK_SIZE \ 121 -c 1000 -d 0 122 123log_pass "reducing reservation allows other datasets to use space" 124