tools/testing/selftests/zram/zram_lib.sh

   1 #!/bin/sh
   2 # Copyright (c) 2015 Oracle and/or its affiliates. All Rights Reserved.
   3 #
   4 # This program is free software; you can redistribute it and/or
   5 # modify it under the terms of the GNU General Public License as
   6 # published by the Free Software Foundation; either version 2 of
   7 # the License, or (at your option) any later version.
   8 #
   9 # This program is distributed in the hope that it would be useful,
  10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 # GNU General Public License for more details.
  13 #
  14 # Author: Alexey Kodanev <alexey.kodanev@oracle.com>
  15 # Modified: Naresh Kamboju <naresh.kamboju@linaro.org>
  16
  17 MODULE=0
  18 dev_makeswap=-1
  19 dev_mounted=-1
  20
  21 # Kselftest framework requirement - SKIP code is 4.
  22 ksft_skip=4
  23
  24 trap INT
  25
  26 check_prereqs()
  27 {
  28         local msg="skip all tests:"
  29         local uid=$(id -u)
  30
  31         if [ $uid -ne 0 ]; then
  32                 echo $msg must be run as root >&2
  33                 exit $ksft_skip
  34         fi
  35 }
  36
  37 zram_cleanup()
  38 {
  39         echo "zram cleanup"
  40         local i=
  41         for i in $(seq 0 $dev_makeswap); do
  42                 swapoff /dev/zram$i
  43         done
  44
  45         for i in $(seq 0 $dev_mounted); do
  46                 umount /dev/zram$i
  47         done
  48
  49         for i in $(seq 0 $(($dev_num - 1))); do
  50                 echo 1 > /sys/block/zram${i}/reset
  51                 rm -rf zram$i
  52         done
  53
  54 }
  55
  56 zram_unload()
  57 {
  58         if [ $MODULE -ne 0 ] ; then
  59                 echo "zram rmmod zram"
  60                 rmmod zram > /dev/null 2>&1
  61         fi
  62 }
  63
  64 zram_load()
  65 {
  66         # check zram module exists
  67         MODULE_PATH=/lib/modules/`uname -r`/kernel/drivers/block/zram/zram.ko
  68         if [ -f $MODULE_PATH ]; then
  69                 MODULE=1
  70                 echo "create '$dev_num' zram device(s)"
  71                 modprobe zram num_devices=$dev_num
  72                 if [ $? -ne 0 ]; then
  73                         echo "failed to insert zram module"
  74                         exit 1
  75                 fi
  76
  77                 dev_num_created=$(ls /dev/zram* | wc -w)
  78
  79                 if [ "$dev_num_created" -ne "$dev_num" ]; then
  80                         echo "unexpected num of devices: $dev_num_created"
  81                         ERR_CODE=-1
  82                 else
  83                         echo "zram load module successful"
  84                 fi
  85         elif [ -b /dev/zram0 ]; then
  86                 echo "/dev/zram0 device file found: OK"
  87         else
  88                 echo "ERROR: No zram.ko module or no /dev/zram0 device found"
  89                 echo "$TCID : CONFIG_ZRAM is not set"
  90                 exit 1
  91         fi
  92 }
  93
  94 zram_max_streams()
  95 {
  96         echo "set max_comp_streams to zram device(s)"
  97
  98         local i=0
  99         for max_s in $zram_max_streams; do
 100                 local sys_path="/sys/block/zram${i}/max_comp_streams"
 101                 echo $max_s > $sys_path || \
 102                         echo "FAIL failed to set '$max_s' to $sys_path"
 103                 sleep 1
 104                 local max_streams=$(cat $sys_path)
 105
 106                 [ "$max_s" -ne "$max_streams" ] && \
 107                         echo "FAIL can't set max_streams '$max_s', get $max_stream"
 108
 109                 i=$(($i + 1))
 110                 echo "$sys_path = '$max_streams' ($i/$dev_num)"
 111         done
 112
 113         echo "zram max streams: OK"
 114 }
 115
 116 zram_compress_alg()
 117 {
 118         echo "test that we can set compression algorithm"
 119
 120         local algs=$(cat /sys/block/zram0/comp_algorithm)
 121         echo "supported algs: $algs"
 122         local i=0
 123         for alg in $zram_algs; do
 124                 local sys_path="/sys/block/zram${i}/comp_algorithm"
 125                 echo "$alg" >   $sys_path || \
 126                         echo "FAIL can't set '$alg' to $sys_path"
 127                 i=$(($i + 1))
 128                 echo "$sys_path = '$alg' ($i/$dev_num)"
 129         done
 130
 131         echo "zram set compression algorithm: OK"
 132 }
 133
 134 zram_set_disksizes()
 135 {
 136         echo "set disk size to zram device(s)"
 137         local i=0
 138         for ds in $zram_sizes; do
 139                 local sys_path="/sys/block/zram${i}/disksize"
 140                 echo "$ds" >    $sys_path || \
 141                         echo "FAIL can't set '$ds' to $sys_path"
 142
 143                 i=$(($i + 1))
 144                 echo "$sys_path = '$ds' ($i/$dev_num)"
 145         done
 146
 147         echo "zram set disksizes: OK"
 148 }
 149
 150 zram_set_memlimit()
 151 {
 152         echo "set memory limit to zram device(s)"
 153
 154         local i=0
 155         for ds in $zram_mem_limits; do
 156                 local sys_path="/sys/block/zram${i}/mem_limit"
 157                 echo "$ds" >    $sys_path || \
 158                         echo "FAIL can't set '$ds' to $sys_path"
 159
 160                 i=$(($i + 1))
 161                 echo "$sys_path = '$ds' ($i/$dev_num)"
 162         done
 163
 164         echo "zram set memory limit: OK"
 165 }
 166
 167 zram_makeswap()
 168 {
 169         echo "make swap with zram device(s)"
 170         local i=0
 171         for i in $(seq 0 $(($dev_num - 1))); do
 172                 mkswap /dev/zram$i > err.log 2>&1
 173                 if [ $? -ne 0 ]; then
 174                         cat err.log
 175                         echo "FAIL mkswap /dev/zram$1 failed"
 176                 fi
 177
 178                 swapon /dev/zram$i > err.log 2>&1
 179                 if [ $? -ne 0 ]; then
 180                         cat err.log
 181                         echo "FAIL swapon /dev/zram$1 failed"
 182                 fi
 183
 184                 echo "done with /dev/zram$i"
 185                 dev_makeswap=$i
 186         done
 187
 188         echo "zram making zram mkswap and swapon: OK"
 189 }
 190
 191 zram_swapoff()
 192 {
 193         local i=
 194         for i in $(seq 0 $dev_makeswap); do
 195                 swapoff /dev/zram$i > err.log 2>&1
 196                 if [ $? -ne 0 ]; then
 197                         cat err.log
 198                         echo "FAIL swapoff /dev/zram$i failed"
 199                 fi
 200         done
 201         dev_makeswap=-1
 202
 203         echo "zram swapoff: OK"
 204 }
 205
 206 zram_makefs()
 207 {
 208         local i=0
 209         for fs in $zram_filesystems; do
 210                 # if requested fs not supported default it to ext2
 211                 which mkfs.$fs > /dev/null 2>&1 || fs=ext2
 212
 213                 echo "make $fs filesystem on /dev/zram$i"
 214                 mkfs.$fs /dev/zram$i > err.log 2>&1
 215                 if [ $? -ne 0 ]; then
 216                         cat err.log
 217                         echo "FAIL failed to make $fs on /dev/zram$i"
 218                 fi
 219                 i=$(($i + 1))
 220                 echo "zram mkfs.$fs: OK"
 221         done
 222 }
 223
 224 zram_mount()
 225 {
 226         local i=0
 227         for i in $(seq 0 $(($dev_num - 1))); do
 228                 echo "mount /dev/zram$i"
 229                 mkdir zram$i
 230                 mount /dev/zram$i zram$i > /dev/null || \
 231                         echo "FAIL mount /dev/zram$i failed"
 232                 dev_mounted=$i
 233         done
 234
 235         echo "zram mount of zram device(s): OK"
 236 }