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|
#!/bin/bash
# SPDX-License-Identifier: GPL-2.0
SYSFS=
# Kselftest framework requirement - SKIP code is 4.
ksft_skip=4
retval=0
prerequisite()
{
msg="skip all tests:"
if [ $UID != 0 ]; then
echo $msg must be run as root >&2
exit $ksft_skip
fi
taskset -p 01 $$
SYSFS=`mount -t sysfs | head -1 | awk '{ print $3 }'`
if [ ! -d "$SYSFS" ]; then
echo $msg sysfs is not mounted >&2
exit $ksft_skip
fi
if ! ls $SYSFS/devices/system/cpu/cpu* > /dev/null 2>&1; then
echo $msg cpu hotplug is not supported >&2
exit $ksft_skip
fi
echo "CPU online/offline summary:"
online_cpus=`cat $SYSFS/devices/system/cpu/online`
online_max=${online_cpus##*-}
if [[ "$online_cpus" = "$online_max" ]]; then
echo "$msg: since there is only one cpu: $online_cpus"
exit $ksft_skip
fi
present_cpus=`cat $SYSFS/devices/system/cpu/present`
present_max=${present_cpus##*-}
echo "present_cpus = $present_cpus present_max = $present_max"
echo -e "\t Cpus in online state: $online_cpus"
offline_cpus=`cat $SYSFS/devices/system/cpu/offline`
if [[ "a$offline_cpus" = "a" ]]; then
offline_cpus=0
else
offline_max=${offline_cpus##*-}
fi
echo -e "\t Cpus in offline state: $offline_cpus"
}
#
# list all hot-pluggable CPUs
#
hotpluggable_cpus()
{
local state=${1:-.\*}
for cpu in $SYSFS/devices/system/cpu/cpu*; do
if [ -f $cpu/online ] && grep -q $state $cpu/online; then
echo ${cpu##/*/cpu}
fi
done
}
hotplaggable_offline_cpus()
{
hotpluggable_cpus 0
}
hotpluggable_online_cpus()
{
hotpluggable_cpus 1
}
cpu_is_online()
{
grep -q 1 $SYSFS/devices/system/cpu/cpu$1/online
}
cpu_is_offline()
{
grep -q 0 $SYSFS/devices/system/cpu/cpu$1/online
}
online_cpu()
{
echo 1 > $SYSFS/devices/system/cpu/cpu$1/online
}
offline_cpu()
{
echo 0 > $SYSFS/devices/system/cpu/cpu$1/online
}
online_cpu_expect_success()
{
local cpu=$1
if ! online_cpu $cpu; then
echo $FUNCNAME $cpu: unexpected fail >&2
retval=1
elif ! cpu_is_online $cpu; then
echo $FUNCNAME $cpu: unexpected offline >&2
retval=1
fi
}
online_cpu_expect_fail()
{
local cpu=$1
if online_cpu $cpu 2> /dev/null; then
echo $FUNCNAME $cpu: unexpected success >&2
retval=1
elif ! cpu_is_offline $cpu; then
echo $FUNCNAME $cpu: unexpected online >&2
retval=1
fi
}
offline_cpu_expect_success()
{
local cpu=$1
if ! offline_cpu $cpu; then
echo $FUNCNAME $cpu: unexpected fail >&2
retval=1
elif ! cpu_is_offline $cpu; then
echo $FUNCNAME $cpu: unexpected offline >&2
retval=1
fi
}
offline_cpu_expect_fail()
{
local cpu=$1
if offline_cpu $cpu 2> /dev/null; then
echo $FUNCNAME $cpu: unexpected success >&2
retval=1
elif ! cpu_is_online $cpu; then
echo $FUNCNAME $cpu: unexpected offline >&2
retval=1
fi
}
online_all_hot_pluggable_cpus()
{
for cpu in `hotplaggable_offline_cpus`; do
online_cpu_expect_success $cpu
done
}
offline_all_hot_pluggable_cpus()
{
local reserve_cpu=$online_max
for cpu in `hotpluggable_online_cpus`; do
# Reserve one cpu oneline at least.
if [ $cpu -eq $reserve_cpu ];then
continue
fi
offline_cpu_expect_success $cpu
done
}
allcpus=0
online_cpus=0
online_max=0
offline_cpus=0
offline_max=0
present_cpus=0
present_max=0
while getopts ah opt; do
case $opt in
a)
allcpus=1
;;
h)
echo "Usage $0 [ -a ]"
echo -e "\t default offline one cpu"
echo -e "\t run with -a option to offline all cpus"
exit
;;
esac
done
prerequisite
#
# Safe test (default) - offline and online one cpu
#
if [ $allcpus -eq 0 ]; then
echo "Limited scope test: one hotplug cpu"
echo -e "\t (leaves cpu in the original state):"
echo -e "\t online to offline to online: cpu $online_max"
offline_cpu_expect_success $online_max
online_cpu_expect_success $online_max
if [[ $offline_cpus -gt 0 ]]; then
echo -e "\t online to offline to online: cpu $present_max"
online_cpu_expect_success $present_max
offline_cpu_expect_success $present_max
online_cpu $present_max
fi
exit $retval
else
echo "Full scope test: all hotplug cpus"
echo -e "\t online all offline cpus"
echo -e "\t offline all online cpus"
echo -e "\t online all offline cpus"
fi
online_all_hot_pluggable_cpus
offline_all_hot_pluggable_cpus
online_all_hot_pluggable_cpus
exit $retval
|
