usr/src/test/zfs-tests/tests/functional/reservation/reservation_012_pos.sh

   1 #!/usr/bin/bash -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 # A reservation guarantees a certain amount of space for a dataset.
  39 # Nothing else which happens in the same pool should affect that
  40 # space, i.e. even if the rest of the pool fills up the reserved
  41 # space should still be accessible.
  42 #
  43 # STRATEGY:
  44 # 1) Create 2 filesystems
  45 # 2) Set a reservation on one filesystem
  46 # 3) Fill up the other filesystem (which does not have a reservation
  47 # set) until all space is consumed
  48 # 4) Verify can still write to the filesystem which has a reservation
  49 #
  50
  51 verify_runnable "both"
  52
  53 log_assert "Verify reservations protect space"
  54
  55 function cleanup
  56 {
  57         log_must zfs destroy -f $TESTPOOL/$TESTFS2
  58         log_must zero_reservation $TESTPOOL/$TESTFS
  59
  60         [[ -e $TESTDIR/$TESTFILE2 ]] && log_must rm -rf $TESTDIR/$TESTFILE2
  61         [[ -d $TESTDIR2 ]] && log_must rm -rf $TESTDIR2
  62 }
  63
  64 log_onexit cleanup
  65
  66 log_must zfs create $TESTPOOL/$TESTFS2
  67 log_must zfs set mountpoint=$TESTDIR2 $TESTPOOL/$TESTFS2
  68
  69 space_avail=`get_prop available $TESTPOOL`
  70
  71 ((resv_size_set = space_avail - RESV_FREE_SPACE))
  72
  73 log_must zfs set reservation=$resv_size_set $TESTPOOL/$TESTFS
  74
  75 ((write_count = (RESV_FREE_SPACE + RESV_TOLERANCE) / BLOCK_SIZE))
  76
  77 file_write -o create -f $TESTDIR2/$TESTFILE1 -b $BLOCK_SIZE -c $write_count \
  78     -d 0
  79 ret=$?
  80 if [[ $ret != $ENOSPC ]]; then
  81         log_fail "Did not get ENOSPC (got $ret) for non-reserved filesystem"
  82 fi
  83
  84 ((write_count = (RESV_FREE_SPACE - RESV_TOLERANCE) / BLOCK_SIZE))
  85 log_must file_write -o create -f $TESTDIR/$TESTFILE2 -b $BLOCK_SIZE -c \
  86     $write_count -d 0
  87
  88 log_pass "Reserved space preserved correctly"