tests/zfs-tests/tests/functional/reservation/reservation_016_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 2007 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 implicit
  39 # reservation) destroying the volume should allow more data to be written
  40 # to the filesystem
  41 #
  42 #
  43 # STRATEGY:
  44 # 1) Create a regular (non-sparse) volume
  45 # 2) Create a filesystem at the same level
  46 # 3) Fill up the filesystem
  47 # 4) Destroy the volume
  48 # 5) Verify can write more data to the filesystem
  49 #
  50
  51 verify_runnable "global"
  52
  53 log_assert "Destroying a regular volume with reservation allows more data to" \
  54     " be written to top level filesystem"
  55
  56 function cleanup
  57 {
  58         datasetexists $TESTPOOL/$TESTVOL && \
  59             log_must zfs destroy $TESTPOOL/$TESTVOL
  60
  61         [[ -e $TESTDIR/$TESTFILE1 ]] && log_must rm -rf $TESTDIR/$TESTFILE1
  62         [[ -e $TESTDIR/$TESTFILE2 ]] && log_must rm -rf $TESTDIR/$TESTFILE2
  63 }
  64 log_onexit cleanup
  65
  66 space_avail=$(largest_volsize_from_pool $TESTPOOL)
  67
  68 #
  69 # To make sure this test doesn't take too long to execute on
  70 # large pools, we calculate a volume size which will ensure we
  71 # have RESV_FREE_SPACE left free in the pool.
  72 #
  73 ((vol_set_size = space_avail - RESV_FREE_SPACE))
  74 vol_set_size=$(floor_volsize $vol_set_size)
  75
  76 # Creating a regular volume implicitly sets its reservation
  77 # property to the same value.
  78 log_must zfs create -V $vol_set_size $TESTPOOL/$TESTVOL
  79
  80 space_avail_still=$(get_prop available $TESTPOOL)
  81 fill_size=$((space_avail_still + $RESV_TOLERANCE))
  82 write_count=$((fill_size / BLOCK_SIZE))
  83
  84 # Now fill up the filesystem (which doesn't have a reservation set
  85 # and thus will use up whatever free space is left in the pool).
  86 file_write -o create -f $TESTDIR/$TESTFILE1 -b $BLOCK_SIZE -c $write_count -d 0
  87 ret=$?
  88 if (($ret != $ENOSPC)); then
  89         log_fail "Did not get ENOSPC as expected (got $ret)."
  90 fi
  91
  92 log_must zfs destroy -f $TESTPOOL/$TESTVOL
  93
  94 log_must file_write -o create -f $TESTDIR/$TESTFILE2 \
  95     -b $(getconf PAGESIZE) -c 1000 -d 0
  96
  97 log_pass "Destroying volume with reservation allows more data to be written " \
  98     "to top level filesystem"