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#!/bin/sh # SPDX-License-Identifier: GPL-2.0-or-later # Copyright (c) 2015 Oracle and/or its affiliates. All Rights Reserved. # # Author: Alexey Kodanev <alexey.kodanev@oracle.com> # Modified: Naresh Kamboju <naresh.kamboju@linaro.org> dev_makeswap=-1 dev_mounted=-1 dev_start=0 dev_end=-1 module_load=-1 sys_control=-1 # Kselftest framework requirement - SKIP code is 4. ksft_skip=4 kernel_version=`uname -r | cut -d'.' -f1,2` kernel_major=${kernel_version%.*} kernel_minor=${kernel_version#*.} trap INT check_prereqs() { local msg="skip all tests:" local uid=$(id -u) if [ $uid -ne 0 ]; then echo $msg must be run as root >&2 exit $ksft_skip fi } kernel_gte() { major=${1%.*} minor=${1#*.} if [ $kernel_major -gt $major ]; then return 0 elif [[ $kernel_major -eq $major && $kernel_minor -ge $minor ]]; then return 0 fi return 1 } zram_cleanup() { echo "zram cleanup" local i= for i in $(seq $dev_start $dev_makeswap); do swapoff /dev/zram$i done for i in $(seq $dev_start $dev_mounted); do umount /dev/zram$i done for i in $(seq $dev_start $dev_end); do echo 1 > /sys/block/zram${i}/reset rm -rf zram$i done if [ $sys_control -eq 1 ]; then for i in $(seq $dev_start $dev_end); do echo $i > /sys/class/zram-control/hot_remove done fi if [ $module_load -eq 1 ]; then rmmod zram > /dev/null 2>&1 fi } zram_load() { echo "create '$dev_num' zram device(s)" # zram module loaded, new kernel if [ -d "/sys/class/zram-control" ]; then echo "zram modules already loaded, kernel supports" \ "zram-control interface" dev_start=$(ls /dev/zram* | wc -w) dev_end=$(($dev_start + $dev_num - 1)) sys_control=1 for i in $(seq $dev_start $dev_end); do cat /sys/class/zram-control/hot_add > /dev/null done echo "all zram devices (/dev/zram$dev_start~$dev_end" \ "successfully created" return 0 fi # detect old kernel or built-in modprobe zram num_devices=$dev_num if [ ! -d "/sys/class/zram-control" ]; then if grep -q '^zram' /proc/modules; then rmmod zram > /dev/null 2>&1 if [ $? -ne 0 ]; then echo "zram module is being used on old kernel" \ "without zram-control interface" exit $ksft_skip fi else echo "test needs CONFIG_ZRAM=m on old kernel without" \ "zram-control interface" exit $ksft_skip fi modprobe zram num_devices=$dev_num fi module_load=1 dev_end=$(($dev_num - 1)) echo "all zram devices (/dev/zram0~$dev_end) successfully created" } zram_max_streams() { echo "set max_comp_streams to zram device(s)" kernel_gte 4.7 if [ $? -eq 0 ]; then echo "The device attribute max_comp_streams was"\ "deprecated in 4.7" return 0 fi local i=$dev_start for max_s in $zram_max_streams; do local sys_path="/sys/block/zram${i}/max_comp_streams" echo $max_s > $sys_path || \ echo "FAIL failed to set '$max_s' to $sys_path" sleep 1 local max_streams=$(cat $sys_path) [ "$max_s" -ne "$max_streams" ] && \ echo "FAIL can't set max_streams '$max_s', get $max_stream" i=$(($i + 1)) echo "$sys_path = '$max_streams'" done echo "zram max streams: OK" } zram_compress_alg() { echo "test that we can set compression algorithm" local i=$dev_start local algs=$(cat /sys/block/zram${i}/comp_algorithm) echo "supported algs: $algs" for alg in $zram_algs; do local sys_path="/sys/block/zram${i}/comp_algorithm" echo "$alg" > $sys_path || \ echo "FAIL can't set '$alg' to $sys_path" i=$(($i + 1)) echo "$sys_path = '$alg'" done echo "zram set compression algorithm: OK" } zram_set_disksizes() { echo "set disk size to zram device(s)" local i=$dev_start for ds in $zram_sizes; do local sys_path="/sys/block/zram${i}/disksize" echo "$ds" > $sys_path || \ echo "FAIL can't set '$ds' to $sys_path" i=$(($i + 1)) echo "$sys_path = '$ds'" done echo "zram set disksizes: OK" } zram_set_memlimit() { echo "set memory limit to zram device(s)" local i=$dev_start for ds in $zram_mem_limits; do local sys_path="/sys/block/zram${i}/mem_limit" echo "$ds" > $sys_path || \ echo "FAIL can't set '$ds' to $sys_path" i=$(($i + 1)) echo "$sys_path = '$ds'" done echo "zram set memory limit: OK" } zram_makeswap() { echo "make swap with zram device(s)" local i=$dev_start for i in $(seq $dev_start $dev_end); do mkswap /dev/zram$i > err.log 2>&1 if [ $? -ne 0 ]; then cat err.log echo "FAIL mkswap /dev/zram$1 failed" fi swapon /dev/zram$i > err.log 2>&1 if [ $? -ne 0 ]; then cat err.log echo "FAIL swapon /dev/zram$1 failed" fi echo "done with /dev/zram$i" dev_makeswap=$i done echo "zram making zram mkswap and swapon: OK" } zram_swapoff() { local i= for i in $(seq $dev_start $dev_end); do swapoff /dev/zram$i > err.log 2>&1 if [ $? -ne 0 ]; then cat err.log echo "FAIL swapoff /dev/zram$i failed" fi done dev_makeswap=-1 echo "zram swapoff: OK" } zram_makefs() { local i=$dev_start for fs in $zram_filesystems; do # if requested fs not supported default it to ext2 which mkfs.$fs > /dev/null 2>&1 || fs=ext2 echo "make $fs filesystem on /dev/zram$i" mkfs.$fs /dev/zram$i > err.log 2>&1 if [ $? -ne 0 ]; then cat err.log echo "FAIL failed to make $fs on /dev/zram$i" fi i=$(($i + 1)) echo "zram mkfs.$fs: OK" done } zram_mount() { local i=0 for i in $(seq $dev_start $dev_end); do echo "mount /dev/zram$i" mkdir zram$i mount /dev/zram$i zram$i > /dev/null || \ echo "FAIL mount /dev/zram$i failed" dev_mounted=$i done echo "zram mount of zram device(s): OK" }
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