[LTP] [PATCH] device-drivers/zram: new zram test

[LTP] [PATCH] device-drivers/zram: new zram test

[Alexey Kodanev]

* create library with initialization/cleanup functions
* add two functional tests: zram01 and zram02:
  zram01 creates general purpose ram disks with different filesystems
  zram02 creates block device for swap

Signed-off-by: Alexey Kodanev <alexey.kodanev@oracle.com>
---
 runtest/kernel_misc                              |    2 +
 testcases/kernel/device-drivers/Makefile         |    3 +-
 testcases/kernel/device-drivers/zram/Makefile    |   22 +++
 testcases/kernel/device-drivers/zram/zram01.sh   |   89 +++++++++
 testcases/kernel/device-drivers/zram/zram02.sh   |   45 +++++
 testcases/kernel/device-drivers/zram/zram_lib.sh |  209 ++++++++++++++++++++++
 6 files changed, 369 insertions(+), 1 deletions(-)
 create mode 100644 testcases/kernel/device-drivers/zram/Makefile
 create mode 100755 testcases/kernel/device-drivers/zram/zram01.sh
 create mode 100755 testcases/kernel/device-drivers/zram/zram02.sh
 create mode 100755 testcases/kernel/device-drivers/zram/zram_lib.sh

diff --git a/runtest/kernel_misc b/runtest/kernel_misc
index 6a29de6..7615c15 100644
--- a/runtest/kernel_misc
+++ b/runtest/kernel_misc
@@ -9,3 +9,5 @@ cpufreq_boost cpufreq_boost
 uaccess uaccess
 rcu_torture rcu_torture.sh
 lock_torture lock_torture.sh
+zram01 zram01.sh
+zram02 zram02.sh
diff --git a/testcases/kernel/device-drivers/Makefile b/testcases/kernel/device-drivers/Makefile
index 551d137..55e0d25 100644
--- a/testcases/kernel/device-drivers/Makefile
+++ b/testcases/kernel/device-drivers/Makefile
@@ -26,6 +26,7 @@ SUBDIRS		:= acpi \
 		   rcu \
 		   rtc \
 		   tbio \
-		   uaccess
+		   uaccess \
+		   zram
 
 include $(top_srcdir)/include/mk/generic_trunk_target.mk
diff --git a/testcases/kernel/device-drivers/zram/Makefile b/testcases/kernel/device-drivers/zram/Makefile
new file mode 100644
index 0000000..0d73f66
--- /dev/null
+++ b/testcases/kernel/device-drivers/zram/Makefile
@@ -0,0 +1,22 @@
+# Copyright (c) 2015 Oracle and/or its affiliates. All Rights Reserved.
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation; either version 2 of
+# the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it would be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write the Free Software Foundation,
+# Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+top_srcdir	?= ../../../..
+include $(top_srcdir)/include/mk/testcases.mk
+
+INSTALL_TARGETS		:= *.sh
+
+include $(top_srcdir)/include/mk/generic_leaf_target.mk
diff --git a/testcases/kernel/device-drivers/zram/zram01.sh b/testcases/kernel/device-drivers/zram/zram01.sh
new file mode 100755
index 0000000..49cbbe9
--- /dev/null
+++ b/testcases/kernel/device-drivers/zram/zram01.sh
@@ -0,0 +1,89 @@
+#!/bin/sh
+# Copyright (c) 2015 Oracle and/or its affiliates. All Rights Reserved.
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation; either version 2 of
+# the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it would be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write the Free Software Foundation,
+# Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+#
+# Test creates several zram devices with different filesystems on them.
+# It fills each device with zeros and checks that compression works.
+#
+# Author: Alexey Kodanev <alexey.kodanev@oracle.com>
+
+TCID="zram01"
+TST_TOTAL=8
+
+. test.sh
+. zram_lib.sh
+
+# Test will create the following number of zram devices:
+dev_num=4
+# This is a list of parameters for zram devices.
+# Number of items must be equal to 'dev_num' parameter.
+zram_max_streams="2 3 5 8"
+zram_sizes="25M 25M 25M 25M"
+zram_mem_limits="25M 25M 25M 25M"
+zram_filesystems="ext3 ext4 xfs btrfs"
+zram_algs="lzo lzo lzo lzo"
+
+TST_CLEANUP="zram_cleanup"
+
+zram_fill_fs()
+{
+	tst_check_cmds dd free awk
+	local mem_free0=$(free -m | awk 'NR==2 {print $4}')
+
+	for i in $(seq 0 $(($dev_num - 1))); do
+		tst_resm TINFO "fill zram$i..."
+		local b=0
+		while ((1)); do
+			dd conv=notrunc if=/dev/zero of=zram${i}/file \
+				oflag=append count=1 bs=1024 status=none \
+				> /dev/null 2>&1 || break
+			b=$(($b + 1))
+		done
+		tst_resm TINFO "zram$i can be filled with '$b' KB"
+	done
+
+	local mem_free1=$(free -m | awk 'NR==2 {print $4}')
+	local used_mem=$(($mem_free0 - $mem_free1))
+
+	local total_size=0
+	for sm in $zram_sizes; do
+		local s=$(echo $sm | sed 's/M//')
+		total_size=$(($total_size + $s))
+	done
+
+	tst_resm TINFO "zram used ${used_mem}M, zram disk sizes ${total_size}M"
+
+	local v=$((100 * $total_size / $used_mem))
+
+	if [ "$v" -lt 100 ]; then
+		tst_resm TFAIL "compression ratio: 0.$v:1"
+		return
+	fi
+
+	tst_resm TPASS "compression ratio: $(echo "scale=2; $v / 100 " | bc):1"
+}
+
+zram_load
+zram_max_streams
+zram_compress_alg
+zram_set_disksizes
+zram_set_memlimit
+zram_makefs
+zram_mount
+
+zram_fill_fs
+
+tst_exit
diff --git a/testcases/kernel/device-drivers/zram/zram02.sh b/testcases/kernel/device-drivers/zram/zram02.sh
new file mode 100755
index 0000000..53f69bb
--- /dev/null
+++ b/testcases/kernel/device-drivers/zram/zram02.sh
@@ -0,0 +1,45 @@
+#!/bin/sh
+# Copyright (c) 2015 Oracle and/or its affiliates. All Rights Reserved.
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation; either version 2 of
+# the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it would be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write the Free Software Foundation,
+# Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+#
+# Test checks that we can create swap zram device.
+#
+# Author: Alexey Kodanev <alexey.kodanev@oracle.com>
+
+TCID="zram02"
+TST_TOTAL=7
+
+. test.sh
+. zram_lib.sh
+
+# Test will create the following number of zram devices:
+dev_num=1
+# This is a list of parameters for zram devices.
+# Number of items must be equal to 'dev_num' parameter.
+zram_max_streams="2"
+zram_sizes="100G"
+zram_mem_limits="1M"
+
+TST_CLEANUP="zram_cleanup"
+
+zram_load
+zram_max_streams
+zram_set_disksizes
+zram_set_memlimit
+zram_makeswap
+zram_swapoff
+
+tst_exit
diff --git a/testcases/kernel/device-drivers/zram/zram_lib.sh b/testcases/kernel/device-drivers/zram/zram_lib.sh
new file mode 100755
index 0000000..a424bcc
--- /dev/null
+++ b/testcases/kernel/device-drivers/zram/zram_lib.sh
@@ -0,0 +1,209 @@
+#!/bin/sh
+# Copyright (c) 2015 Oracle and/or its affiliates. All Rights Reserved.
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation; either version 2 of
+# the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it would be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write the Free Software Foundation,
+# Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+#
+# Author: Alexey Kodanev <alexey.kodanev@oracle.com>
+
+dev_makeswap=-1
+dev_mounted=-1
+
+trap tst_exit INT
+
+zram_cleanup()
+{
+	tst_resm TINFO "zram cleanup"
+	local i=
+	for i in $(seq 0 $dev_makeswap); do
+		swapoff /dev/zram$i
+	done
+
+	for i in $(seq 0 $dev_mounted); do
+		umount /dev/zram$i
+	done
+
+	for i in $(seq 0 $(($dev_num - 1))); do
+		echo 1 > /sys/block/zram${i}/reset
+	done
+
+	rmmod zram > /dev/null 2>&1
+
+	tst_rmdir
+}
+
+zram_load()
+{
+	tst_resm TINFO "create '$dev_num' zram device(s)"
+	modprobe zram num_devices=$dev_num || \
+		tst_brkm TBROK "failed to insert zram module"
+
+	dev_num_created=$(ls /dev/zram* | wc -w)
+
+	if [ "$dev_num_created" -ne "$dev_num" ]; then
+		tst_brkm TFAIL "unexpected num of devices: $dev_num_created"
+	else
+		tst_resm TPASS "test succeeded"
+	fi
+
+	tst_tmpdir
+}
+
+zram_max_streams()
+{
+	tst_resm TINFO "set max_comp_streams to zram device(s)"
+
+	local i=0
+	for max_s in $zram_max_streams; do
+		local sys_path="/sys/block/zram${i}/max_comp_streams"
+		echo $max_s > $sys_path || \
+			tst_brkm TFAIL "failed to set '$max_s' to $sys_path"
+		local max_streams=$(cat $sys_path)
+
+		[ "$max_s" -ne "$max_streams" ] && \
+			tst_brkm TFAIL "can't set max_streams '$max_s', get $max_stream"
+
+		i=$(($i + 1))
+		tst_resm TINFO "$sys_path = '$max_streams' ($i/$dev_num)"
+	done
+
+	tst_resm TPASS "test succeeded"
+}
+
+zram_compress_alg()
+{
+	tst_resm TINFO "test that we can set compression algorithm"
+	local algs=$(cat /sys/block/zram0/comp_algorithm)
+	tst_resm TINFO "supported algs: $algs"
+	local i=0
+	for alg in $zram_algs; do
+		local sys_path="/sys/block/zram${i}/comp_algorithm"
+		echo "$alg" >  $sys_path || \
+			tst_brkm TFAIL "can't set 'lzo' to $sys_path"
+		i=$(($i + 1))
+		tst_resm TINFO "$sys_path = 'lzo' ($i/$dev_num)"
+	done
+
+	tst_resm TPASS "test succeeded"
+}
+
+zram_set_disksizes()
+{
+	tst_resm TINFO "set disk size to zram device(s)"
+	local i=0
+	for ds in $zram_sizes; do
+		local sys_path="/sys/block/zram${i}/disksize"
+		echo "$ds" >  $sys_path || \
+			tst_brkm TFAIL "can't set '$ds' to $sys_path"
+
+		i=$(($i + 1))
+		tst_resm TINFO "$sys_path = '$ds' ($i/$dev_num)"
+	done
+
+	tst_resm TPASS "test succeeded"
+}
+
+zram_set_memlimit()
+{
+	tst_resm TINFO "set memory limit to zram device(s)"
+	local i=0
+	for ds in $zram_mem_limits; do
+		local sys_path="/sys/block/zram${i}/mem_limit"
+		echo "$ds" >  $sys_path || \
+			tst_brkm TFAIL "can't set '$ds' to $sys_path"
+
+		i=$(($i + 1))
+		tst_resm TINFO "$sys_path = '$ds' ($i/$dev_num)"
+	done
+
+	tst_resm TPASS "test succeeded"
+}
+
+zram_makeswap()
+{
+	tst_resm TINFO "make swap with zram device(s)"
+	tst_check_cmds mkswap swapon swapoff
+	local i=0
+	for i in $(seq 0 $(($dev_num - 1))); do
+		mkswap /dev/zram$i > err.log 2>&1
+		if [ $? -ne 0 ]; then
+			cat err.log
+			tst_brkm TFAIL "mkswap /dev/zram$1 failed"
+		fi
+
+		swapon /dev/zram$i > err.log 2>&1
+		if [ $? -ne 0 ]; then
+			cat err.log
+			tst_brkm TFAIL "swapon /dev/zram$1 failed"
+		fi
+
+		tst_resm TINFO "done with /dev/zram$i"
+		dev_makeswap=$i
+	done
+
+	tst_resm TPASS "making zram swap succeeded"
+}
+
+zram_swapoff()
+{
+	tst_check_cmds swapoff
+	local i=
+	for i in $(seq 0 $dev_makeswap); do
+		swapoff /dev/zram$i > err.log 2>&1
+		if [ $? -ne 0 ]; then
+			cat err.log
+			tst_brkm TFAIL "swapoff /dev/zram$i failed"
+		fi
+	done
+	dev_makeswap=-1
+
+	tst_resm TPASS "swapoff completed"
+}
+
+zram_makefs()
+{
+	tst_check_cmds mkfs which
+	local i=0
+	for fs in $zram_filesystems; do
+		# if requested fs not supported default it to ext2
+		which mkfs.$fs > /dev/null 2>&1 || fs=ext2
+
+		tst_resm TINFO "make $fs filesystem on /dev/zram$i"
+		mkfs.$fs /dev/zram$i > err.log 2>&1
+		if [ $? -ne 0 ]; then
+			cat err.log
+			tst_brkm TFAIL "failed to make $fs on /dev/zram$i"
+		fi
+		i=$(($i + 1))
+	done
+
+	tst_resm TPASS "zram_makefs succeeded"
+}
+
+zram_mount()
+{
+	local i=0
+	for i in $(seq 0 $(($dev_num - 1))); do
+		tst_resm TINFO "mount /dev/zram$i"
+		mkdir zram$i
+		mount /dev/zram$i zram$i > /dev/null || \
+			tst_brkm TFAIL "mount /dev/zram$i failed"
+		dev_mounted=$i
+	done
+
+	tst_resm TPASS "mount of zram device(s) succeeded"
+}
+
+modinfo zram > /dev/null 2>&1 ||
+	tst_brkm TCONF "zram not configured in kernel"
-- 
1.7.1


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Re: [LTP] [PATCH] device-drivers/zram: new zram test

[Cyril Hrubis]

Hi!
> +zram_compress_alg()
> +{
> +	tst_resm TINFO "test that we can set compression algorithm"
> +	local algs=$(cat /sys/block/zram0/comp_algorithm)
> +	tst_resm TINFO "supported algs: $algs"
> +	local i=0
> +	for alg in $zram_algs; do
> +		local sys_path="/sys/block/zram${i}/comp_algorithm"
> +		echo "$alg" >  $sys_path || \
> +			tst_brkm TFAIL "can't set 'lzo' to $sys_path"
                                                   ^
					Shouldn't this be $alg ?
> +		i=$(($i + 1))
> +		tst_resm TINFO "$sys_path = 'lzo' ($i/$dev_num)"
                                             ^
				      Here as well.
> +	done
> +
> +	tst_resm TPASS "test succeeded"
> +}
> +

Otherwise it looks good, acked.

-- 
Cyril Hrubis
chrubis@suse.cz

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