tests/zfs-tests/tests/functional/snapshot/snapshot_008_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/snapshot/snapshot.cfg
  34
  35 #
  36 # DESCRIPTION:
  37 # Verify that destroying snapshots returns space to the pool.
  38 #
  39 # STRATEGY:
  40 # 1. Create a file system and populate it while snapshotting.
  41 # 2. Destroy the snapshots and remove the files.
  42 # 3. Verify the space returns to the pool.
  43 #
  44
  45 verify_runnable "both"
  46
  47 function cleanup
  48 {
  49         typeset -i i=1
  50         while [[ $i -lt $COUNT ]]; do
  51                 snapexists $SNAPFS.$i
  52                 [[ $? -eq 0 ]] && \
  53                         log_must zfs destroy $SNAPFS.$i
  54
  55                 (( i = i + 1 ))
  56         done
  57
  58         [[ -e $TESTDIR ]] && \
  59                 log_must rm -rf $TESTDIR/* > /dev/null 2>&1
  60 }
  61
  62 log_assert "Verify that destroying snapshots returns space to the pool."
  63
  64 log_onexit cleanup
  65
  66 [[ -n $TESTDIR ]] && \
  67     log_must rm -rf $TESTDIR/* > /dev/null 2>&1
  68
  69 typeset -i COUNT=10
  70
  71 orig_size=`get_prop available $TESTPOOL`
  72
  73 log_note "Populate the $TESTDIR directory"
  74 typeset -i i=1
  75 while [[ $i -lt $COUNT ]]; do
  76         log_must file_write -o create -f $TESTDIR/file$i \
  77            -b $BLOCKSZ -c $NUM_WRITES -d $i
  78
  79         log_must zfs snapshot $SNAPFS.$i
  80         (( i = i + 1 ))
  81 done
  82
  83 typeset -i i=1
  84 while [[ $i -lt $COUNT ]]; do
  85         log_must rm -rf $TESTDIR/file$i > /dev/null 2>&1
  86         log_must zfs destroy $SNAPFS.$i
  87
  88         (( i = i + 1 ))
  89 done
  90
  91 wait_freeing $TESTPOOL
  92 sync_pool
  93
  94 new_size=`get_prop available $TESTPOOL`
  95
  96 typeset -i tolerance=0
  97
  98 (( tolerance = new_size - orig_size))
  99 if (( tolerance > LIMIT )); then
 100         log_fail "Space not freed. ($orig_size != $new_size)"
 101 fi
 102
 103 log_pass "After destroying snapshots, the space is returned to the pool."