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, 2016 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# 39function 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# 71function 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# 95function 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# 116function 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# 142function volsize_to_reservation 143{ 144 typeset vol=$1 145 typeset -i volsize=$2 146 147 typeset -i DN_MAX_INDBLKSHIFT=17 148 typeset -i SPA_BLKPTRSHIFT=7 149 typeset -i SPA_DVAS_PER_BP=3 150 151 typeset -i DNODES_PER_LEVEL_SHIFT=$((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# 186function 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} 202