tests/zfs-tests/tests/functional/reservation/reservation_009_pos.sh

   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 another filesystem with a reservation
  39 # setting the reservation on the second filesystem to 'none' should allow more
  40 # data to be written to the first filesystem.
  41 #
  42 #
  43 # STRATEGY:
  44 # 1) Create a filesystem as a dataset
  45 # 2) Create a filesystem at the same level
  46 # 3) Set a reservation on the dataset filesystem
  47 # 4) Fill up the filesystem
  48 # 5) Set the reservation on the dataset filesystem to 'none'
  49 # 6) Verify we can write more data to the first filesystem
  50 #
  51
  52 verify_runnable "both"
  53
  54 log_assert "Setting top level dataset reservation to 'none' allows more data " \
  55     "to be written to top level filesystem"
  56
  57 function cleanup
  58 {
  59         log_must rm -rf $TESTDIR/$TESTFILE1
  60         log_must rm -rf $TESTDIR/$TESTFILE2
  61         log_must zfs destroy -f $TESTPOOL/$TESTFS1
  62 }
  63
  64 log_onexit cleanup
  65
  66 log_must zfs create $TESTPOOL/$TESTFS1
  67
  68 space_avail=`get_prop available $TESTPOOL`
  69
  70 #
  71 # To make sure this test doesn't take too long to execute on
  72 # large pools, we calculate a reservation setting which when
  73 # applied to the dataset will ensure we have RESV_FREE_SPACE
  74 # left free in the pool which we can quickly fill.
  75 #
  76 ((resv_size_set = space_avail - RESV_FREE_SPACE))
  77
  78 log_must zfs set reservation=$resv_size_set $TESTPOOL/$TESTFS1
  79
  80 space_avail_still=`get_prop available $TESTPOOL`
  81
  82 fill_size=`expr $space_avail_still + $RESV_TOLERANCE`
  83 write_count=`expr $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 \
  88         -c $write_count -d 0
  89 ret=$?
  90 if (($ret != $ENOSPC)); then
  91         log_fail "Did not get ENOSPC as expected (got $ret)."
  92 fi
  93
  94 log_must zfs set reservation=none $TESTPOOL/$TESTFS1
  95
  96 log_must file_write -o create -f $TESTDIR/$TESTFILE2 \
  97     -b $(getconf PAGESIZE) -c 1000 -d 0
  98
  99 log_pass "Setting top level dataset reservation to 'none' allows more " \
 100     "data to be written to the top level filesystem"