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#!/bin/sh
# Copyright (c) 2015 Oracle and/or its affiliates. All Rights Reserved.
# Copyright (c) 2019-2022 Petr Vorel <pvorel@suse.cz>
# Author: Alexey Kodanev <alexey.kodanev@oracle.com>
dev_makeswap=-1
dev_mounted=-1
dev_start=0
dev_end=-1
module_load=-1
sys_control=-1
TST_NEEDS_TMPDIR=1
TST_NEEDS_ROOT=1
TST_SETUP="${TST_SETUP:-zram_load}"
TST_CLEANUP="${TST_CLEANUP:-zram_cleanup}"
TST_NEEDS_DRIVERS="zram"
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
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 [ $module_load -eq 1 ]; then
rmmod zram > /dev/null 2>&1
fi
}
zram_load()
{
local tmp
if [ -z "$dev_num" ]; then
dev_num=0
for tmp in $zram_max_streams; do
dev_num=$((dev_num+1))
done
fi
if [ $dev_num -le 0 ]; then
tst_brk TBROK "dev_num must be > 0"
fi
tst_set_timeout $((dev_num*450))
tst_res TINFO "create '$dev_num' zram device(s)"
# zram module loaded, new kernel
if [ -d "/sys/class/zram-control" ]; then
tst_res TINFO "zram module 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 $dev_end); do
cat /sys/class/zram-control/hot_add > /dev/null
done
tst_res TPASS "all zram devices (/dev/zram$dev_start~$dev_end) successfully created"
return
fi
# detect old kernel or built-in
modprobe zram num_devices=$dev_num
if [ ! -d "/sys/class/zram-control" ]; then
if grep -q '^zram' /proc/modules; then
rmmod zram > /dev/null 2>&1 || \
tst_brk TCONF "zram module is being used on old kernel without zram-control interface"
else
tst_brk TCONF "test needs CONFIG_ZRAM=m on old kernel without zram-control interface"
fi
modprobe zram num_devices=$dev_num
fi
module_load=1
dev_end=$(($dev_num - 1))
tst_res TPASS "all zram devices (/dev/zram0~$dev_end) successfully created"
}
zram_max_streams()
{
if tst_kvcmp -lt "3.15" -o -ge "4.7"; then
tst_res TCONF "The device attribute max_comp_streams was"\
"introduced in kernel 3.15 and deprecated in 4.7"
return
fi
tst_res TINFO "set max_comp_streams to zram device(s)"
local i=$dev_start
for max_s in $zram_max_streams; do
local sys_path="/sys/block/zram${i}/max_comp_streams"
if ! echo $max_s > $sys_path; then
tst_res TFAIL "failed to set '$max_s' to $sys_path"
return
fi
local max_streams=$(cat $sys_path)
if [ "$max_s" -ne "$max_streams" ]; then
tst_res TFAIL "can't set max_streams '$max_s', get $max_stream"
return
fi
i=$(($i + 1))
tst_res TINFO "$sys_path = '$max_streams'"
done
tst_res TPASS "test succeeded"
}
zram_compress_alg()
{
if tst_kvcmp -lt "3.15"; then
tst_res TCONF "device attribute comp_algorithm is"\
"introduced since kernel v3.15, the running kernel"\
"does not support it"
return
fi
local i=$dev_start
tst_res TINFO "test that we can set compression algorithm"
local algs="$(sed 's/[][]//g' /sys/block/zram${i}/comp_algorithm)"
tst_res TINFO "supported algs: $algs"
for i in $(seq $dev_start $dev_end); do
for alg in $algs; do
local sys_path="/sys/block/zram${i}/comp_algorithm"
if ! echo "$alg" > $sys_path; then
tst_res TFAIL "can't set '$alg' to $sys_path"
return
fi
tst_res TINFO "$sys_path = '$alg'"
done
done
tst_res TPASS "test succeeded"
}
zram_set_disksizes()
{
local i=$dev_start
local ds
tst_res TINFO "set disk size to zram device(s)"
for ds in $zram_sizes; do
local sys_path="/sys/block/zram${i}/disksize"
if ! echo "$ds" > $sys_path; then
tst_res TFAIL "can't set '$ds' to $sys_path"
return
fi
i=$(($i + 1))
tst_res TINFO "$sys_path = '$ds'"
done
tst_res TPASS "test succeeded"
}
zram_set_memlimit()
{
if tst_kvcmp -lt "3.18"; then
tst_res TCONF "device attribute mem_limit is"\
"introduced since kernel v3.18, the running kernel"\
"does not support it"
return
fi
local i=$dev_start
local ds
tst_res TINFO "set memory limit to zram device(s)"
for ds in $zram_mem_limits; do
local sys_path="/sys/block/zram${i}/mem_limit"
if ! echo "$ds" > $sys_path; then
tst_res TFAIL "can't set '$ds' to $sys_path"
return
fi
i=$(($i + 1))
tst_res TINFO "$sys_path = '$ds'"
done
tst_res TPASS "test succeeded"
}
. tst_test.sh
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