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