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