summaryrefslogtreecommitdiff
path: root/tools/testing/selftests/zram/zram_lib.sh
blob: 21ec1966de76ca4047fe50eea82015bc03986c98 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
#!/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"
}