1 #
   2 # CDDL HEADER START
   3 #
   4 # The contents of this file are subject to the terms of the
   5 # Common Development and Distribution License (the "License").
   6 # You may not use this file except in compliance with the License.
   7 #
   8 # You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9 # or http://www.opensolaris.org/os/licensing.
  10 # See the License for the specific language governing permissions
  11 # and limitations under the License.
  12 #
  13 # When distributing Covered Code, include this CDDL HEADER in each
  14 # file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15 # If applicable, add the following below this CDDL HEADER, with the
  16 # fields enclosed by brackets "[]" replaced with your own identifying
  17 # information: Portions Copyright [yyyy] [name of copyright owner]
  18 #
  19 # CDDL HEADER END
  20 #
  21 
  22 #
  23 # Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
  24 # Use is subject to license terms.
  25 #
  26 
  27 #
  28 # Copyright (c) 2013 by Delphix. All rights reserved.
  29 #
  30 
  31 . $STF_SUITE/tests/functional/reservation/reservation.cfg
  32 
  33 #
  34 # Function to set the reservation property of a dataset to
  35 # 'none' and verify that it is correctly set using both the
  36 # "normal" 'zfs get reservation' and the '-p' option which
  37 # gives a numerical value.
  38 #
  39 function zero_reservation
  40 {
  41         typeset resv_val
  42         dataset=$1
  43 
  44         log_must $ZFS set reservation=none $dataset
  45 
  46         resv_val=`$ZFS get -H reservation $dataset | awk '{print $3}'`
  47         if [[ $? -ne 0 ]]; then
  48                 log_fail "Unable to get reservation prop on $dataset"
  49         elif [[ $resv_val != "none" ]]; then
  50                 log_fail "Reservation not 'none' ($resv_val) as expected"
  51         fi
  52 
  53 
  54         resv_val=`$ZFS get -pH reservation $dataset | awk '{print $3}'`
  55         if [[ $? -ne 0 ]]; then
  56                 log_fail "Unable to get reservation prop on $dataset"
  57         elif [[ $resv_val -ne 0 ]]; then
  58                 log_fail "Reservation not 0 ($resv_val) as expected"
  59         fi
  60 
  61         return 0
  62 }
  63 
  64 #
  65 # Utility function to see if two values are within a certain specified
  66 # limit of each other. Used primarily to check that a dataset's parent
  67 # is correctly accounting for space used/available. Need this function as
  68 # currently there is some slop in the way space is accounted (i.e. can't
  69 # do a direct comparison).
  70 #
  71 function within_limits
  72 {
  73         typeset -l valA=$1
  74         typeset -l valB=$2
  75         typeset -l delta=$3
  76 
  77         if ((valA <= valB)); then
  78                 if (((valB - valA) <= delta)); then
  79                         return 0
  80                 fi
  81         elif ((valB <= valA)); then
  82                 if (((valA - valB) <= delta)); then
  83                         return 0
  84                 fi
  85         fi
  86 
  87         return 1
  88 }
  89 
  90 #
  91 # Function to create and mount multiple filesystems. The filesystem
  92 # will be named according to the name specified with a suffix value
  93 # taken from the loop counter.
  94 #
  95 function create_multiple_fs # num_fs base_fs_name base_mnt_name
  96 {
  97         typeset -i iter=0
  98         typeset -i count=$1
  99         typeset FS_NAME=$2
 100         typeset MNT_NAME=$3
 101 
 102         while  (($iter < $count)); do
 103                 log_must $ZFS create ${FS_NAME}$iter
 104                 log_must $ZFS set mountpoint=${MNT_NAME}$iter ${FS_NAME}$iter
 105                 ((iter = iter + 1))
 106         done
 107 }
 108 
 109 #
 110 # This function compute the largest volume size which is multiple of volume
 111 # block size (default 8K) and not greater than the largest expected volsize.
 112 #
 113 # $1 The largest expected volume size.
 114 # $2 The volume block size
 115 #
 116 function floor_volsize #<largest_volsize> [volblksize]
 117 {
 118         typeset -l largest_volsize=$1
 119         typeset -l volblksize=${2:-8192}
 120 
 121         if ((largest_volsize < volblksize)); then
 122                 log_fail "The largest_volsize must be greater than volblksize."
 123         fi
 124         typeset -l real_volsize
 125         typeset -l n
 126 
 127         ((n = largest_volsize / volblksize))
 128         ((largest_volsize = volblksize * n))
 129 
 130         print $largest_volsize
 131 }
 132 
 133 #
 134 # This function is a copy of a function by the same name in libzfs_dataset.c
 135 # Its purpose is to reserve additional space for volume metadata so volumes
 136 # don't unexpectedly run out of room.
 137 #
 138 # Note: This function can be used to do an estimate for a volume that has not
 139 # yet been created. In this case, $vol is not a volume, but rather a pool in
 140 # which a volume is going to be created. In this case, use default properties.
 141 #
 142 function volsize_to_reservation
 143 {
 144         typeset vol=$1
 145         typeset -i volsize=$2
 146 
 147         typeset -i DN_MAX_INDBLKSHIFT=14
 148         typeset -i SPA_BLKPTRSHIFT=7
 149         typeset -i SPA_DVAS_PER_BP=3
 150 
 151         typeset -i DNODES_PER_LEVEL_SHIFT=$((DN_MAX_INDBLKSHIFT - \
 152             SPA_BLKPTRSHIFT))
 153         typeset -i DNODES_PER_LEVEL=$((1 << $DNODES_PER_LEVEL_SHIFT))
 154 
 155         if ds_is_volume $vol; then
 156                 typeset -i ncopies=$(get_prop copies $vol)
 157                 typeset -i volblocksize=$(get_prop volblocksize $vol)
 158         else
 159                 typeset -i ncopies=1
 160                 typeset -i volblocksize=8192
 161         fi
 162         typeset -i nblocks=$((volsize / volblocksize))
 163 
 164         typeset -i numdb=7
 165         while ((nblocks > 1)); do
 166                 ((nblocks += DNODES_PER_LEVEL - 1))
 167                 ((nblocks /= DNODES_PER_LEVEL))
 168                 ((numdb += nblocks))
 169         done
 170 
 171         ((numdb *= SPA_DVAS_PER_BP < ncopies + 1 ? SPA_DVAS_PER_BP : \
 172             ncopies + 1))
 173         ((volsize *= ncopies))
 174         ((numdb *= 1 << DN_MAX_INDBLKSHIFT))
 175         ((volsize += numdb))
 176         echo $volsize
 177 }
 178 
 179 #
 180 # This function takes a pool name as an argument, and returns the largest (give
 181 # or take some slop) -V value that can be used to create a volume in that pool.
 182 # This is necessary because during volume creation, a reservation is created
 183 # that will be larger than the value specified with -V, and potentially larger
 184 # than the available space in the pool. See volsize_to_reservation().
 185 #
 186 function largest_volsize_from_pool
 187 {
 188         typeset pool=$1
 189         typeset -i poolsize=$(get_prop available $pool)
 190         typeset -i volsize=$poolsize
 191         typeset -i nvolsize
 192 
 193         while :; do
 194                 # knock 50M off the volsize each time through
 195                 ((volsize -= 50 * 1024 * 1024))
 196                 nvolsize=$(volsize_to_reservation $pool $volsize)
 197                 nvolsize=$(floor_volsize $nvolsize)
 198                 ((nvolsize < poolsize)) && break
 199         done
 200         echo $volsize
 201 }