| #!/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 |
| . $STF_SUITE/tests/functional/reservation/reservation.shlib |
| |
| # |
| # DESCRIPTION: |
| # |
| # Setting a reservation reserves a defined minimum amount of space for |
| # a dataset, and prevents other datasets using that space. Verify that |
| # reducing the reservation on a filesystem allows other datasets in |
| # the pool to use that space. |
| # |
| # STRATEGY: |
| # 1) Create multiple filesystems |
| # 2) Set reservations on all bar one of the filesystems |
| # 3) Fill up the one non-reserved filesystem |
| # 4) Reduce one of the reservations and verify can write more |
| # data into the non-reserved filesystem |
| # |
| |
| verify_runnable "both" |
| |
| log_assert "Verify reducing reservation allows other datasets to use space" |
| |
| function cleanup |
| { |
| typeset -i loop=0 |
| while (($loop < $RESV_NUM_FS)); do |
| datasetexists $TESTPOOL/${TESTFS}$loop && \ |
| log_must zfs destroy -f $TESTPOOL/${TESTFS}$loop |
| |
| [[ -d ${TESTDIR}$loop ]] && log_must rm -r ${TESTDIR}$loop |
| |
| ((loop = loop + 1)) |
| done |
| } |
| |
| log_onexit cleanup |
| |
| log_must create_multiple_fs $RESV_NUM_FS $TESTPOOL/$TESTFS $TESTDIR |
| |
| space_avail=`get_prop available $TESTPOOL` |
| space_used=`get_prop used $TESTPOOL` |
| |
| # |
| # To make sure this test doesn't take too long to execute on |
| # large pools, we calculate a reservation setting which when |
| # applied to all bar one of the filesystems (RESV_NUM_FS-1) will |
| # ensure we have RESV_FREE_SPACE left free in the pool, which we will |
| # be able to quickly fill. |
| # |
| resv_space_avail=`expr $space_avail - $RESV_FREE_SPACE` |
| num_resv_fs=`expr $RESV_NUM_FS - 1` # Number of FS to which resv will be applied |
| resv_size_set=`expr $resv_space_avail / $num_resv_fs` |
| |
| # |
| # We set the reservations now, rather than when we created the filesystems |
| # to allow us to take into account space used by the filesystem metadata |
| # |
| # Note we don't set a reservation on the first filesystem we created, |
| # hence num=1 rather than zero below. |
| # |
| typeset -i num=1 |
| while (($num < $RESV_NUM_FS)); do |
| log_must zfs set reservation=$resv_size_set $TESTPOOL/$TESTFS$num |
| ((num = num + 1)) |
| done |
| |
| space_avail_still=`get_prop available $TESTPOOL` |
| |
| fill_size=`expr $space_avail_still + $RESV_TOLERANCE` |
| write_count=`expr $fill_size / $BLOCK_SIZE` |
| |
| # Now fill up the first filesystem (which doesn't have a reservation set |
| # and thus will use up whatever free space is left in the pool). |
| num=0 |
| log_note "Writing to $TESTDIR$num/$TESTFILE1" |
| |
| file_write -o create -f $TESTDIR$num/$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 |
| |
| # Remove the reservation on one of the other filesystems and verify |
| # can write more data to the original non-reservation filesystem. |
| num=1 |
| log_must zfs set reservation=none $TESTPOOL/${TESTFS}$num |
| num=0 |
| log_must file_write -o create -f ${TESTDIR}$num/$TESTFILE2 \ |
| -b $(getconf PAGESIZE) -c 1000 -d 0 |
| |
| log_pass "reducing reservation allows other datasets to use space" |