155 lines
3.4 KiB
Bash
Executable File
155 lines
3.4 KiB
Bash
Executable File
#!/bin/sh
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# Copyright (c) 2015 Oracle and/or its affiliates. All Rights Reserved.
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# Copyright (c) 2019-2021 Petr Vorel <pvorel@suse.cz>
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# Author: Alexey Kodanev <alexey.kodanev@oracle.com>
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#
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# Test creates several zram devices with different filesystems on them.
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# It fills each device with zeros and checks that compression works.
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TST_CNT=7
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TST_TESTFUNC="do_test"
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TST_NEEDS_CMDS="awk bc dd"
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. zram_lib.sh
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TST_SETUP="setup"
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check_space_for_btrfs()
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{
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local ram_size
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ram_size=$(awk '/MemTotal:/ {print $2}' /proc/meminfo)
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if [ "$ram_size" -lt 1048576 ]; then
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tst_res TINFO "not enough space for Btrfs"
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return 1
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fi
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return 0
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}
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# List of parameters for zram devices.
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# For each number the test creates own zram device.
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# NOTE about size:
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# The zram sysfs node 'disksize' value can be either in bytes,
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# or you can use mem suffixes. But in some old kernels, mem
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# suffixes are not supported, for example, in RHEL6.6GA's kernel
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# layer, it uses strict_strtoull() to parse disksize which does
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# not support mem suffixes, in some newer kernels, they use
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# memparse() which supports mem suffixes. So here we just use
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# bytes to make sure everything works correctly.
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initialize_vars()
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{
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local fs limit size stream=-1
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dev_num=0
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for fs in $(tst_supported_fs); do
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[ "$fs" = "tmpfs" ] && continue
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size="26214400"
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limit="25M"
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if [ "$fs" = "btrfs" ]; then
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check_space_for_btrfs || continue
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size="402653184"
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limit="$((size/1024/1024))M"
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fi
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stream=$((stream+3))
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dev_num=$((dev_num+1))
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zram_filesystems="$zram_filesystems $fs"
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zram_mem_limits="$zram_mem_limits $limit"
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zram_sizes="$zram_sizes $size"
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zram_max_streams="$zram_max_streams $stream"
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done
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[ $dev_num -eq 0 ] && \
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tst_brk TCONF "no suitable filesystem"
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}
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setup()
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{
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initialize_vars
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zram_load
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}
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zram_makefs()
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{
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local i=0
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local fs
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for fs in $zram_filesystems; do
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tst_res TINFO "make $fs filesystem on /dev/zram$i"
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mkfs.$fs /dev/zram$i > err.log 2>&1
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if [ $? -ne 0 ]; then
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cat err.log
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tst_brk TFAIL "failed to make $fs on /dev/zram$i"
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fi
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i=$(($i + 1))
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done
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tst_res TPASS "zram_makefs succeeded"
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}
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zram_mount()
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{
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local i=0
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for i in $(seq 0 $(($dev_num - 1))); do
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tst_res TINFO "mount /dev/zram$i"
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mkdir zram$i
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ROD mount /dev/zram$i zram$i
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dev_mounted=$i
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done
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tst_res TPASS "mount of zram device(s) succeeded"
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}
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zram_fill_fs()
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{
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for i in $(seq 0 $(($dev_num - 1))); do
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tst_res TINFO "filling zram$i (it can take long time)"
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local b=0
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while true; do
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dd conv=notrunc if=/dev/zero of=zram${i}/file \
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oflag=append count=1 bs=1024 status=none \
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>/dev/null 2>err.txt || break
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b=$(($b + 1))
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done
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if [ $b -eq 0 ]; then
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[ -s err.txt ] && tst_res TWARN "dd error: $(cat err.txt)"
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tst_brk TBROK "cannot fill zram $i"
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fi
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tst_res TPASS "zram$i was filled with '$b' KB"
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if [ ! -f "/sys/block/zram$i/mm_stat" ]; then
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if [ $i -eq 0 ]; then
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tst_res TCONF "zram compression ratio test requires zram mm_stat sysfs file"
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fi
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continue
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fi
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local compr_size=`awk '{print $2}' "/sys/block/zram$i/mm_stat"`
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local v=$((100 * 1024 * $b / $compr_size))
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local r=`echo "scale=2; $v / 100 " | bc`
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if [ "$v" -lt 100 ]; then
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tst_res TFAIL "compression ratio: $r:1"
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break
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fi
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tst_res TPASS "compression ratio: $r:1"
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done
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}
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do_test()
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{
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case $1 in
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1) zram_max_streams;;
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2) zram_compress_alg;;
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3) zram_set_disksizes;;
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4) zram_set_memlimit;;
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5) zram_makefs;;
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6) zram_mount;;
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7) zram_fill_fs;;
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esac
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}
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tst_run
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