tests/zfs-tests/tests/functional/nopwrite/nopwrite.shlib

   1 #
   2 # This file and its contents are supplied under the terms of the
   3 # Common Development and Distribution License ("CDDL"), version 1.0.
   4 # You may only use this file in accordance with the terms of version
   5 # 1.0 of the CDDL.
   6 #
   7 # A full copy of the text of the CDDL should have accompanied this
   8 # source.  A copy of the CDDL is also available via the Internet at
   9 # http://www.illumos.org/license/CDDL.
  10 #
  11
  12 #
  13 # Copyright (c) 2012, 2016 by Delphix. All rights reserved.
  14 #
  15
  16 . $STF_SUITE/include/math.shlib
  17
  18 export TESTVOL="testvol.nopwrite"
  19 export VOLSIZE="256M"
  20 export MEGS="64"
  21
  22 function verify_nopwrite
  23 {
  24         typeset origin=$1
  25         typeset snap=$2
  26         typeset clone=$3
  27         typeset low=1
  28         typeset high=99
  29
  30         sync_pool
  31         for i in origin snap clone; do
  32                 for j in used refer usedbychildren written; do
  33                         typeset ${i}_$j=$(get_prop $j $(eval echo \$$i))
  34                 done
  35         done
  36
  37         #
  38         # If we are dealing with a volume, deduct the refreserv from the used
  39         # value to prevent real failures from being masked by the unexpected
  40         # extra space. Also, volumes use more space for metadata, so adjust the
  41         # percentages to be more forgiving.
  42         #
  43         if [[ "$(get_prop type $origin)" = "volume" ]]; then
  44                 typeset rr=$(get_prop refreserv $origin)
  45                 ((origin_used -= rr ))
  46                 low=2
  47                 high=98
  48         fi
  49
  50         # These values should differ greatly with nopwrite.
  51         within_percent $origin_used $clone_used $low && return 1
  52         within_percent $origin_refer $origin_usedbychildren $low && return 1
  53         within_percent $snap_written $clone_written $low && return 1
  54
  55         # These values should be nearly the same with nopwrite.
  56         within_percent $origin_used $clone_refer $high || return 1
  57         within_percent $origin_used $snap_refer $high || return 1
  58
  59         #
  60         # The comparisons below should pass regardless of nopwrite. They're
  61         # here for sanity.
  62         #
  63         typeset deadlist=$(zdb -Pddd $clone | awk '/Deadlist:/ {print $2}')
  64         within_percent $deadlist $clone_written $high || return 1
  65         within_percent $snap_refer $snap_written $high || return 1
  66
  67         return 0
  68 }