#!/bin/sh
# SPDX-License-Identifier: GPL-2.0-or-later
# Copyright (c) 2015 Oracle and/or its affiliates. All Rights Reserved.
#
# Author: Alexey Kodanev <[email protected]>
# Modified: Naresh Kamboju <[email protected]>
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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