1 #!/bin/bash 1 #!/bin/bash
2 # SPDX-License-Identifier: GPL-2.0 2 # SPDX-License-Identifier: GPL-2.0
3 3
4 SYSFS= 4 SYSFS=
5 # Kselftest framework requirement - SKIP code 5 # Kselftest framework requirement - SKIP code is 4.
6 ksft_skip=4 6 ksft_skip=4
7 retval=0 <<
8 7
9 prerequisite() 8 prerequisite()
10 { 9 {
11 msg="skip all tests:" 10 msg="skip all tests:"
12 11
13 if [ $UID != 0 ]; then 12 if [ $UID != 0 ]; then
14 echo $msg must be run as root 13 echo $msg must be run as root >&2
15 exit $ksft_skip 14 exit $ksft_skip
16 fi 15 fi
17 16
18 taskset -p 01 $$ 17 taskset -p 01 $$
19 18
20 SYSFS=`mount -t sysfs | head -1 | awk 19 SYSFS=`mount -t sysfs | head -1 | awk '{ print $3 }'`
21 20
22 if [ ! -d "$SYSFS" ]; then 21 if [ ! -d "$SYSFS" ]; then
23 echo $msg sysfs is not mounted 22 echo $msg sysfs is not mounted >&2
24 exit $ksft_skip 23 exit $ksft_skip
25 fi 24 fi
26 25
27 if ! ls $SYSFS/devices/system/cpu/cpu* 26 if ! ls $SYSFS/devices/system/cpu/cpu* > /dev/null 2>&1; then
28 echo $msg cpu hotplug is not s 27 echo $msg cpu hotplug is not supported >&2
29 exit $ksft_skip 28 exit $ksft_skip
30 fi 29 fi
31 30
32 echo "CPU online/offline summary:" 31 echo "CPU online/offline summary:"
33 online_cpus=`cat $SYSFS/devices/system 32 online_cpus=`cat $SYSFS/devices/system/cpu/online`
34 online_max=${online_cpus##*-} 33 online_max=${online_cpus##*-}
35 34
36 if [[ "$online_cpus" = "$online_max" ] 35 if [[ "$online_cpus" = "$online_max" ]]; then
37 echo "$msg: since there is onl 36 echo "$msg: since there is only one cpu: $online_cpus"
38 exit $ksft_skip 37 exit $ksft_skip
39 fi 38 fi
40 39
41 present_cpus=`cat $SYSFS/devices/syste <<
42 present_max=${present_cpus##*-} <<
43 echo "present_cpus = $present_cpus pre <<
44 <<
45 echo -e "\t Cpus in online state: $onl 40 echo -e "\t Cpus in online state: $online_cpus"
46 41
47 offline_cpus=`cat $SYSFS/devices/syste 42 offline_cpus=`cat $SYSFS/devices/system/cpu/offline`
48 if [[ "a$offline_cpus" = "a" ]]; then 43 if [[ "a$offline_cpus" = "a" ]]; then
49 offline_cpus=0 44 offline_cpus=0
50 else 45 else
51 offline_max=${offline_cpus##*- 46 offline_max=${offline_cpus##*-}
52 fi 47 fi
53 echo -e "\t Cpus in offline state: $of 48 echo -e "\t Cpus in offline state: $offline_cpus"
54 } 49 }
55 50
56 # 51 #
57 # list all hot-pluggable CPUs 52 # list all hot-pluggable CPUs
58 # 53 #
59 hotpluggable_cpus() 54 hotpluggable_cpus()
60 { 55 {
61 local state=${1:-.\*} 56 local state=${1:-.\*}
62 57
63 for cpu in $SYSFS/devices/system/cpu/c 58 for cpu in $SYSFS/devices/system/cpu/cpu*; do
64 if [ -f $cpu/online ] && grep 59 if [ -f $cpu/online ] && grep -q $state $cpu/online; then
65 echo ${cpu##/*/cpu} 60 echo ${cpu##/*/cpu}
66 fi 61 fi
67 done 62 done
68 } 63 }
69 64
70 hotplaggable_offline_cpus() 65 hotplaggable_offline_cpus()
71 { 66 {
72 hotpluggable_cpus 0 67 hotpluggable_cpus 0
73 } 68 }
74 69
75 hotpluggable_online_cpus() 70 hotpluggable_online_cpus()
76 { 71 {
77 hotpluggable_cpus 1 72 hotpluggable_cpus 1
78 } 73 }
79 74
80 cpu_is_online() 75 cpu_is_online()
81 { 76 {
82 grep -q 1 $SYSFS/devices/system/cpu/cp 77 grep -q 1 $SYSFS/devices/system/cpu/cpu$1/online
83 } 78 }
84 79
85 cpu_is_offline() 80 cpu_is_offline()
86 { 81 {
87 grep -q 0 $SYSFS/devices/system/cpu/cp 82 grep -q 0 $SYSFS/devices/system/cpu/cpu$1/online
88 } 83 }
89 84
90 online_cpu() 85 online_cpu()
91 { 86 {
92 echo 1 > $SYSFS/devices/system/cpu/cpu 87 echo 1 > $SYSFS/devices/system/cpu/cpu$1/online
93 } 88 }
94 89
95 offline_cpu() 90 offline_cpu()
96 { 91 {
97 echo 0 > $SYSFS/devices/system/cpu/cpu 92 echo 0 > $SYSFS/devices/system/cpu/cpu$1/online
98 } 93 }
99 94
100 online_cpu_expect_success() 95 online_cpu_expect_success()
101 { 96 {
102 local cpu=$1 97 local cpu=$1
103 98
104 if ! online_cpu $cpu; then 99 if ! online_cpu $cpu; then
105 echo $FUNCNAME $cpu: unexpecte 100 echo $FUNCNAME $cpu: unexpected fail >&2
106 retval=1 !! 101 exit 1
107 elif ! cpu_is_online $cpu; then 102 elif ! cpu_is_online $cpu; then
108 echo $FUNCNAME $cpu: unexpecte 103 echo $FUNCNAME $cpu: unexpected offline >&2
109 retval=1 !! 104 exit 1
110 fi 105 fi
111 } 106 }
112 107
113 online_cpu_expect_fail() 108 online_cpu_expect_fail()
114 { 109 {
115 local cpu=$1 110 local cpu=$1
116 111
117 if online_cpu $cpu 2> /dev/null; then 112 if online_cpu $cpu 2> /dev/null; then
118 echo $FUNCNAME $cpu: unexpecte 113 echo $FUNCNAME $cpu: unexpected success >&2
119 retval=1 !! 114 exit 1
120 elif ! cpu_is_offline $cpu; then 115 elif ! cpu_is_offline $cpu; then
121 echo $FUNCNAME $cpu: unexpecte 116 echo $FUNCNAME $cpu: unexpected online >&2
122 retval=1 !! 117 exit 1
123 fi 118 fi
124 } 119 }
125 120
126 offline_cpu_expect_success() 121 offline_cpu_expect_success()
127 { 122 {
128 local cpu=$1 123 local cpu=$1
129 124
130 if ! offline_cpu $cpu; then 125 if ! offline_cpu $cpu; then
131 echo $FUNCNAME $cpu: unexpecte 126 echo $FUNCNAME $cpu: unexpected fail >&2
132 retval=1 !! 127 exit 1
133 elif ! cpu_is_offline $cpu; then 128 elif ! cpu_is_offline $cpu; then
134 echo $FUNCNAME $cpu: unexpecte 129 echo $FUNCNAME $cpu: unexpected offline >&2
135 retval=1 !! 130 exit 1
136 fi 131 fi
137 } 132 }
138 133
139 offline_cpu_expect_fail() 134 offline_cpu_expect_fail()
140 { 135 {
141 local cpu=$1 136 local cpu=$1
142 137
143 if offline_cpu $cpu 2> /dev/null; then 138 if offline_cpu $cpu 2> /dev/null; then
144 echo $FUNCNAME $cpu: unexpecte 139 echo $FUNCNAME $cpu: unexpected success >&2
145 retval=1 !! 140 exit 1
146 elif ! cpu_is_online $cpu; then 141 elif ! cpu_is_online $cpu; then
147 echo $FUNCNAME $cpu: unexpecte 142 echo $FUNCNAME $cpu: unexpected offline >&2
148 retval=1 !! 143 exit 1
149 fi 144 fi
150 } 145 }
151 146
152 online_all_hot_pluggable_cpus() !! 147 error=-12
153 { <<
154 for cpu in `hotplaggable_offline_cpus` <<
155 online_cpu_expect_success $cpu <<
156 done <<
157 } <<
158 <<
159 offline_all_hot_pluggable_cpus() <<
160 { <<
161 local reserve_cpu=$online_max <<
162 for cpu in `hotpluggable_online_cpus`; <<
163 # Reserve one cpu oneline at l <<
164 if [ $cpu -eq $reserve_cpu ];t <<
165 continue <<
166 fi <<
167 offline_cpu_expect_success $cp <<
168 done <<
169 } <<
170 <<
171 allcpus=0 148 allcpus=0
>> 149 priority=0
172 online_cpus=0 150 online_cpus=0
173 online_max=0 151 online_max=0
174 offline_cpus=0 152 offline_cpus=0
175 offline_max=0 153 offline_max=0
176 present_cpus=0 <<
177 present_max=0 <<
178 154
179 while getopts ah opt; do !! 155 while getopts e:ahp: opt; do
180 case $opt in 156 case $opt in
>> 157 e)
>> 158 error=$OPTARG
>> 159 ;;
181 a) 160 a)
182 allcpus=1 161 allcpus=1
183 ;; 162 ;;
184 h) 163 h)
185 echo "Usage $0 [ -a ]" !! 164 echo "Usage $0 [ -a ] [ -e errno ] [ -p notifier-priority ]"
186 echo -e "\t default offline on 165 echo -e "\t default offline one cpu"
187 echo -e "\t run with -a option 166 echo -e "\t run with -a option to offline all cpus"
188 exit 167 exit
189 ;; 168 ;;
>> 169 p)
>> 170 priority=$OPTARG
>> 171 ;;
190 esac 172 esac
191 done 173 done
192 174
>> 175 if ! [ "$error" -ge -4095 -a "$error" -lt 0 ]; then
>> 176 echo "error code must be -4095 <= errno < 0" >&2
>> 177 exit 1
>> 178 fi
>> 179
193 prerequisite 180 prerequisite
194 181
195 # 182 #
196 # Safe test (default) - offline and online one 183 # Safe test (default) - offline and online one cpu
197 # 184 #
198 if [ $allcpus -eq 0 ]; then 185 if [ $allcpus -eq 0 ]; then
199 echo "Limited scope test: one hotplug 186 echo "Limited scope test: one hotplug cpu"
200 echo -e "\t (leaves cpu in the origina 187 echo -e "\t (leaves cpu in the original state):"
201 echo -e "\t online to offline to onlin 188 echo -e "\t online to offline to online: cpu $online_max"
202 offline_cpu_expect_success $online_max 189 offline_cpu_expect_success $online_max
203 online_cpu_expect_success $online_max 190 online_cpu_expect_success $online_max
204 191
205 if [[ $offline_cpus -gt 0 ]]; then 192 if [[ $offline_cpus -gt 0 ]]; then
206 echo -e "\t online to offline !! 193 echo -e "\t offline to online to offline: cpu $offline_max"
207 online_cpu_expect_success $pre !! 194 online_cpu_expect_success $offline_max
208 offline_cpu_expect_success $pr !! 195 offline_cpu_expect_success $offline_max
209 online_cpu $present_max <<
210 fi 196 fi
211 exit $retval !! 197 exit 0
212 else 198 else
213 echo "Full scope test: all hotplug cpu 199 echo "Full scope test: all hotplug cpus"
214 echo -e "\t online all offline cpus" 200 echo -e "\t online all offline cpus"
215 echo -e "\t offline all online cpus" 201 echo -e "\t offline all online cpus"
216 echo -e "\t online all offline cpus" 202 echo -e "\t online all offline cpus"
217 fi 203 fi
218 204
219 online_all_hot_pluggable_cpus !! 205 #
>> 206 # Online all hot-pluggable CPUs
>> 207 #
>> 208 for cpu in `hotplaggable_offline_cpus`; do
>> 209 online_cpu_expect_success $cpu
>> 210 done
>> 211
>> 212 #
>> 213 # Offline all hot-pluggable CPUs
>> 214 #
>> 215 for cpu in `hotpluggable_online_cpus`; do
>> 216 offline_cpu_expect_success $cpu
>> 217 done
>> 218
>> 219 #
>> 220 # Online all hot-pluggable CPUs again
>> 221 #
>> 222 for cpu in `hotplaggable_offline_cpus`; do
>> 223 online_cpu_expect_success $cpu
>> 224 done
>> 225
>> 226 #
>> 227 # Test with cpu notifier error injection
>> 228 #
>> 229
>> 230 DEBUGFS=`mount -t debugfs | head -1 | awk '{ print $3 }'`
>> 231 NOTIFIER_ERR_INJECT_DIR=$DEBUGFS/notifier-error-inject/cpu
>> 232
>> 233 prerequisite_extra()
>> 234 {
>> 235 msg="skip extra tests:"
>> 236
>> 237 /sbin/modprobe -q -r cpu-notifier-error-inject
>> 238 /sbin/modprobe -q cpu-notifier-error-inject priority=$priority
>> 239
>> 240 if [ ! -d "$DEBUGFS" ]; then
>> 241 echo $msg debugfs is not mounted >&2
>> 242 exit $ksft_skip
>> 243 fi
>> 244
>> 245 if [ ! -d $NOTIFIER_ERR_INJECT_DIR ]; then
>> 246 echo $msg cpu-notifier-error-inject module is not available >&2
>> 247 exit $ksft_skip
>> 248 fi
>> 249 }
220 250
221 offline_all_hot_pluggable_cpus !! 251 prerequisite_extra
222 252
223 online_all_hot_pluggable_cpus !! 253 #
>> 254 # Offline all hot-pluggable CPUs
>> 255 #
>> 256 echo 0 > $NOTIFIER_ERR_INJECT_DIR/actions/CPU_DOWN_PREPARE/error
>> 257 for cpu in `hotpluggable_online_cpus`; do
>> 258 offline_cpu_expect_success $cpu
>> 259 done
>> 260
>> 261 #
>> 262 # Test CPU hot-add error handling (offline => online)
>> 263 #
>> 264 echo $error > $NOTIFIER_ERR_INJECT_DIR/actions/CPU_UP_PREPARE/error
>> 265 for cpu in `hotplaggable_offline_cpus`; do
>> 266 online_cpu_expect_fail $cpu
>> 267 done
>> 268
>> 269 #
>> 270 # Online all hot-pluggable CPUs
>> 271 #
>> 272 echo 0 > $NOTIFIER_ERR_INJECT_DIR/actions/CPU_UP_PREPARE/error
>> 273 for cpu in `hotplaggable_offline_cpus`; do
>> 274 online_cpu_expect_success $cpu
>> 275 done
>> 276
>> 277 #
>> 278 # Test CPU hot-remove error handling (online => offline)
>> 279 #
>> 280 echo $error > $NOTIFIER_ERR_INJECT_DIR/actions/CPU_DOWN_PREPARE/error
>> 281 for cpu in `hotpluggable_online_cpus`; do
>> 282 offline_cpu_expect_fail $cpu
>> 283 done
224 284
225 exit $retval !! 285 echo 0 > $NOTIFIER_ERR_INJECT_DIR/actions/CPU_DOWN_PREPARE/error
>> 286 /sbin/modprobe -q -r cpu-notifier-error-inject
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