tests/zfs-tests/tests/functional/reservation/reservation_015_pos.ksh

   1 #!/bin/ksh -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, 2016 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 # In pool with a full filesystem and a regular volume with an implicit
  39 # reservation, setting the reservation on the volume to 'none' should allow
  40 # more data to be written to the filesystem.
  41 #
  42 #
  43 # STRATEGY:
  44 # 1) Create a regular non-sparse volume (which implicitly sets the reservation
  45 #    property to a value equal to the volume size)
  46 # 2) Create a filesystem at the same level
  47 # 3) Fill up the filesystem
  48 # 4) Set the reservation on the volume to 'none'
  49 # 5) Verify can write more data to the filesystem
  50 #
  51
  52 verify_runnable "global"
  53
  54 log_assert "Setting volume reservation to 'none' allows more data to be " \
  55     "written to top level filesystem"
  56
  57 function cleanup
  58 {
  59         datasetexists $TESTPOOL/$TESTVOL && \
  60         log_must zfs destroy $TESTPOOL/$TESTVOL
  61
  62         [[ -e $TESTDIR/$TESTFILE1 ]] && log_must rm -rf $TESTDIR/$TESTFILE1
  63         [[ -e $TESTDIR/$TESTFILE2 ]] && log_must rm -rf $TESTDIR/$TESTFILE2
  64 }
  65 log_onexit cleanup
  66
  67 space_avail=$(largest_volsize_from_pool $TESTPOOL)
  68
  69 #
  70 # To make sure this test doesn't take too long to execute on
  71 # large pools, we calculate a volume size which when applied
  72 # to the volume will ensure we have RESV_FREE_SPACE
  73 # left free in the pool which we can quickly fill.
  74 #
  75 ((resv_size_set = space_avail - RESV_FREE_SPACE))
  76 resv_size_set=$(floor_volsize $resv_size_set)
  77
  78 log_must zfs create -V $resv_size_set $TESTPOOL/$TESTVOL
  79
  80 space_avail_still=`get_prop available $TESTPOOL`
  81
  82 fill_size=$((space_avail_still + $RESV_TOLERANCE))
  83 write_count=$((fill_size / BLOCK_SIZE))
  84
  85 # Now fill up the filesystem (which doesn't have a reservation set
  86 # and thus will use up whatever free space is left in the pool).
  87 file_write -o create -f $TESTDIR/$TESTFILE1 -b $BLOCK_SIZE -c $write_count -d 0
  88 ret=$?
  89 if (($ret != $ENOSPC)); then
  90         log_fail "Did not get ENOSPC as expected (got $ret)."
  91 fi
  92
  93 log_must zfs set refreservation=none $TESTPOOL/$TESTVOL
  94
  95 log_must file_write -o create -f $TESTDIR/$TESTFILE2 \
  96     -b $(getconf PAGESIZE) -c 1000 -d 0
  97
  98 log_pass "Setting top level volume reservation to 'none' allows more " \
  99     "data to be written to the top level filesystem"