summaryrefslogtreecommitdiffstats
path: root/tools/testing/selftests/rcutorture/bin/functions.sh
blob: 51f3464b96d3bfc3cc276fca9f41081e29585d29 (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
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
#!/bin/bash
# SPDX-License-Identifier: GPL-2.0+
#
# Shell functions for the rest of the scripts.
#
# Copyright (C) IBM Corporation, 2013
#
# Authors: Paul E. McKenney <paulmck@linux.ibm.com>

# bootparam_hotplug_cpu bootparam-string
#
# Returns 1 if the specified boot-parameter string tells rcutorture to
# test CPU-hotplug operations.
bootparam_hotplug_cpu () {
	echo "$1" | grep -q "torture\.onoff_"
}

# checkarg --argname argtype $# arg mustmatch cannotmatch
#
# Checks the specified argument "arg" against the mustmatch and cannotmatch
# patterns.
checkarg () {
	if test $3 -le 1
	then
		echo $1 needs argument $2 matching \"$5\"
		usage
	fi
	if echo "$4" | grep -q -e "$5"
	then
		:
	else
		echo $1 $2 \"$4\" must match \"$5\"
		usage
	fi
	if echo "$4" | grep -q -e "$6"
	then
		echo $1 $2 \"$4\" must not match \"$6\"
		usage
	fi
}

# configfrag_boot_params bootparam-string config-fragment-file
#
# Adds boot parameters from the .boot file, if any.
configfrag_boot_params () {
	if test -r "$2.boot"
	then
		echo $1 `grep -v '^#' "$2.boot" | tr '\012' ' '`
	else
		echo $1
	fi
}

# configfrag_boot_cpus bootparam-string config-fragment-file config-cpus
#
# Decreases number of CPUs based on any nr_cpus= boot parameters specified.
configfrag_boot_cpus () {
	local bootargs="`configfrag_boot_params "$1" "$2"`"
	local nr_cpus
	if echo "${bootargs}" | grep -q 'nr_cpus=[0-9]'
	then
		nr_cpus="`echo "${bootargs}" | sed -e 's/^.*nr_cpus=\([0-9]*\).*$/\1/'`"
		if test "$3" -gt "$nr_cpus"
		then
			echo $nr_cpus
		else
			echo $3
		fi
	else
		echo $3
	fi
}

# configfrag_boot_maxcpus bootparam-string config-fragment-file config-cpus
#
# Decreases number of CPUs based on any maxcpus= boot parameters specified.
# This allows tests where additional CPUs come online later during the
# test run.  However, the torture parameters will be set based on the
# number of CPUs initially present, so the scripting should schedule
# test runs based on the maxcpus= boot parameter controlling the initial
# number of CPUs instead of on the ultimate number of CPUs.
configfrag_boot_maxcpus () {
	local bootargs="`configfrag_boot_params "$1" "$2"`"
	local maxcpus
	if echo "${bootargs}" | grep -q 'maxcpus=[0-9]'
	then
		maxcpus="`echo "${bootargs}" | sed -e 's/^.*maxcpus=\([0-9]*\).*$/\1/'`"
		if test "$3" -gt "$maxcpus"
		then
			echo $maxcpus
		else
			echo $3
		fi
	else
		echo $3
	fi
}

# configfrag_hotplug_cpu config-fragment-file
#
# Returns 1 if the config fragment specifies hotplug CPU.
configfrag_hotplug_cpu () {
	if test ! -r "$1"
	then
		echo Unreadable config fragment "$1" 1>&2
		exit -1
	fi
	grep -q '^CONFIG_HOTPLUG_CPU=y$' "$1"
}

# identify_boot_image qemu-cmd
#
# Returns the relative path to the kernel build image.  This will be
# arch/<arch>/boot/bzImage or vmlinux if bzImage is not a target for the
# architecture, unless overridden with the TORTURE_BOOT_IMAGE environment
# variable.
identify_boot_image () {
	if test -n "$TORTURE_BOOT_IMAGE"
	then
		echo $TORTURE_BOOT_IMAGE
	else
		case "$1" in
		qemu-system-x86_64|qemu-system-i386)
			echo arch/x86/boot/bzImage
			;;
		qemu-system-aarch64)
			echo arch/arm64/boot/Image
			;;
		*)
			echo vmlinux
			;;
		esac
	fi
}

# identify_qemu builddir
#
# Returns our best guess as to which qemu command is appropriate for
# the kernel at hand.  Override with the TORTURE_QEMU_CMD environment variable.
identify_qemu () {
	local u="`file "$1"`"
	if test -n "$TORTURE_QEMU_CMD"
	then
		echo $TORTURE_QEMU_CMD
	elif echo $u | grep -q x86-64
	then
		echo qemu-system-x86_64
	elif echo $u | grep -q "Intel 80386"
	then
		echo qemu-system-i386
	elif echo $u | grep -q aarch64
	then
		echo qemu-system-aarch64
	elif uname -a | grep -q ppc64
	then
		echo qemu-system-ppc64
	else
		echo Cannot figure out what qemu command to use! 1>&2
		echo file $1 output: $u
		# Usually this will be one of /usr/bin/qemu-system-*
		# Use TORTURE_QEMU_CMD environment variable or appropriate
		# argument to top-level script.
		exit 1
	fi
}

# identify_qemu_append qemu-cmd
#
# Output arguments for the qemu "-append" string based on CPU type
# and the TORTURE_QEMU_INTERACTIVE environment variable.
identify_qemu_append () {
	local console=ttyS0
	case "$1" in
	qemu-system-x86_64|qemu-system-i386)
		echo selinux=0 initcall_debug debug
		;;
	qemu-system-aarch64)
		console=ttyAMA0
		;;
	esac
	if test -n "$TORTURE_QEMU_INTERACTIVE"
	then
		echo root=/dev/sda
	else
		echo console=$console
	fi
}

# identify_qemu_args qemu-cmd serial-file
#
# Output arguments for qemu arguments based on the TORTURE_QEMU_MAC
# and TORTURE_QEMU_INTERACTIVE environment variables.
identify_qemu_args () {
	local KVM_CPU=""
	case "$1" in
	qemu-system-x86_64)
		KVM_CPU=kvm64
		;;
	qemu-system-i386)
		KVM_CPU=kvm32
		;;
	esac
	case "$1" in
	qemu-system-x86_64|qemu-system-i386)
		echo -machine q35,accel=kvm
		echo -cpu ${KVM_CPU}
		;;
	qemu-system-aarch64)
		echo -machine virt,gic-version=host -cpu host
		;;
	qemu-system-ppc64)
		echo -enable-kvm -M pseries -nodefaults
		echo -device spapr-vscsi
		if test -n "$TORTURE_QEMU_INTERACTIVE" -a -n "$TORTURE_QEMU_MAC"
		then
			echo -device spapr-vlan,netdev=net0,mac=$TORTURE_QEMU_MAC
			echo -netdev bridge,br=br0,id=net0
		fi
		;;
	esac
	if test -n "$TORTURE_QEMU_INTERACTIVE"
	then
		echo -monitor stdio -serial pty -S
	else
		echo -serial file:$2
	fi
}

# identify_qemu_vcpus
#
# Returns the number of virtual CPUs available to the aggregate of the
# guest OSes.
identify_qemu_vcpus () {
	lscpu | grep '^CPU(s):' | sed -e 's/CPU(s)://' -e 's/[ 	]*//g'
}

# print_bug
#
# Prints "BUG: " in red followed by remaining arguments
print_bug () {
	printf '\033[031mBUG: \033[m'
	echo $*
}

# print_warning
#
# Prints "WARNING: " in yellow followed by remaining arguments
print_warning () {
	printf '\033[033mWARNING: \033[m'
	echo $*
}

# specify_qemu_cpus qemu-cmd qemu-args #cpus
#
# Appends a string containing "-smp XXX" to qemu-args, unless the incoming
# qemu-args already contains "-smp".
specify_qemu_cpus () {
	local nt;

	if echo $2 | grep -q -e -smp
	then
		echo $2
	else
		case "$1" in
		qemu-system-x86_64|qemu-system-i386|qemu-system-aarch64)
			echo $2 -smp $3
			;;
		qemu-system-ppc64)
			nt="`lscpu | grep '^NUMA node0' | sed -e 's/^[^,]*,\([0-9]*\),.*$/\1/'`"
			echo $2 -smp cores=`expr \( $3 + $nt - 1 \) / $nt`,threads=$nt
			;;
		esac
	fi
}

# specify_qemu_net qemu-args
#
# Appends a string containing "-net none" to qemu-args, unless the incoming
# qemu-args already contains "-smp" or unless the TORTURE_QEMU_INTERACTIVE
# environment variable is set, in which case the string that is be added is
# instead "-net nic -net user".
specify_qemu_net () {
	if echo $1 | grep -q -e -net
	then
		echo $1
	elif test -n "$TORTURE_QEMU_INTERACTIVE"
	then
		echo $1 -net nic -net user
	else
		echo $1 -net none
	fi
}