selftests/cpu-hotplug: Reserve one cpu online at least

[linux-2.6-microblaze.git] / tools / testing / selftests / cpu-hotplug / cpu-on-off-test.sh

diff --git a/tools/testing/selftests/cpu-hotplug/cpu-on-off-test.sh b/tools/testing/selftests/cpu-hotplug/cpu-on-off-test.sh
index 0d26b5e..d5dc7e0 100755 (executable)
--- a/tools/testing/selftests/cpu-hotplug/cpu-on-off-test.sh
+++ b/tools/testing/selftests/cpu-hotplug/cpu-on-off-test.sh
@@ -4,6 +4,7 @@
 SYSFS=
 # Kselftest framework requirement - SKIP code is 4.
 ksft_skip=4
+retval=0
 
 prerequisite()
 {
@@ -102,10 +103,10 @@ online_cpu_expect_success()
 
        if ! online_cpu $cpu; then
                echo $FUNCNAME $cpu: unexpected fail >&2
-               exit 1
+               retval=1
        elif ! cpu_is_online $cpu; then
                echo $FUNCNAME $cpu: unexpected offline >&2
-               exit 1
+               retval=1
        fi
 }
 
@@ -115,10 +116,10 @@ online_cpu_expect_fail()
 
        if online_cpu $cpu 2> /dev/null; then
                echo $FUNCNAME $cpu: unexpected success >&2
-               exit 1
+               retval=1
        elif ! cpu_is_offline $cpu; then
                echo $FUNCNAME $cpu: unexpected online >&2
-               exit 1
+               retval=1
        fi
 }
 
@@ -128,10 +129,10 @@ offline_cpu_expect_success()
 
        if ! offline_cpu $cpu; then
                echo $FUNCNAME $cpu: unexpected fail >&2
-               exit 1
+               retval=1
        elif ! cpu_is_offline $cpu; then
                echo $FUNCNAME $cpu: unexpected offline >&2
-               exit 1
+               retval=1
        fi
 }
 
@@ -141,16 +142,33 @@ offline_cpu_expect_fail()
 
        if offline_cpu $cpu 2> /dev/null; then
                echo $FUNCNAME $cpu: unexpected success >&2
-               exit 1
+               retval=1
        elif ! cpu_is_online $cpu; then
                echo $FUNCNAME $cpu: unexpected offline >&2
-               exit 1
+               retval=1
        fi
 }
 
-error=-12
+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
-priority=0
 online_cpus=0
 online_max=0
 offline_cpus=0
@@ -158,31 +176,20 @@ offline_max=0
 present_cpus=0
 present_max=0
 
-while getopts e:ahp: opt; do
+while getopts ah opt; do
        case $opt in
-       e)
-               error=$OPTARG
-               ;;
        a)
                allcpus=1
                ;;
        h)
-               echo "Usage $0 [ -a ] [ -e errno ] [ -p notifier-priority ]"
+               echo "Usage $0 [ -a ]"
                echo -e "\t default offline one cpu"
                echo -e "\t run with -a option to offline all cpus"
                exit
                ;;
-       p)
-               priority=$OPTARG
-               ;;
        esac
 done
 
-if ! [ "$error" -ge -4095 -a "$error" -lt 0 ]; then
-       echo "error code must be -4095 <= errno < 0" >&2
-       exit 1
-fi
-
 prerequisite
 
 #
@@ -196,12 +203,12 @@ if [ $allcpus -eq 0 ]; then
        online_cpu_expect_success $online_max
 
        if [[ $offline_cpus -gt 0 ]]; then
-               echo -e "\t offline to online to offline: cpu $present_max"
+               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 0
+       exit $retval
 else
        echo "Full scope test: all hotplug cpus"
        echo -e "\t online all offline cpus"
@@ -209,85 +216,10 @@ else
        echo -e "\t online all offline cpus"
 fi
 
-#
-# Online all hot-pluggable CPUs
-#
-for cpu in `hotplaggable_offline_cpus`; do
-       online_cpu_expect_success $cpu
-done
-
-#
-# Offline all hot-pluggable CPUs
-#
-for cpu in `hotpluggable_online_cpus`; do
-       offline_cpu_expect_success $cpu
-done
-
-#
-# Online all hot-pluggable CPUs again
-#
-for cpu in `hotplaggable_offline_cpus`; do
-       online_cpu_expect_success $cpu
-done
-
-#
-# Test with cpu notifier error injection
-#
+online_all_hot_pluggable_cpus
 
-DEBUGFS=`mount -t debugfs | head -1 | awk '{ print $3 }'`
-NOTIFIER_ERR_INJECT_DIR=$DEBUGFS/notifier-error-inject/cpu
+offline_all_hot_pluggable_cpus
 
-prerequisite_extra()
-{
-       msg="skip extra tests:"
-
-       /sbin/modprobe -q -r cpu-notifier-error-inject
-       /sbin/modprobe -q cpu-notifier-error-inject priority=$priority
-
-       if [ ! -d "$DEBUGFS" ]; then
-               echo $msg debugfs is not mounted >&2
-               exit $ksft_skip
-       fi
-
-       if [ ! -d $NOTIFIER_ERR_INJECT_DIR ]; then
-               echo $msg cpu-notifier-error-inject module is not available >&2
-               exit $ksft_skip
-       fi
-}
-
-prerequisite_extra
-
-#
-# Offline all hot-pluggable CPUs
-#
-echo 0 > $NOTIFIER_ERR_INJECT_DIR/actions/CPU_DOWN_PREPARE/error
-for cpu in `hotpluggable_online_cpus`; do
-       offline_cpu_expect_success $cpu
-done
-
-#
-# Test CPU hot-add error handling (offline => online)
-#
-echo $error > $NOTIFIER_ERR_INJECT_DIR/actions/CPU_UP_PREPARE/error
-for cpu in `hotplaggable_offline_cpus`; do
-       online_cpu_expect_fail $cpu
-done
-
-#
-# Online all hot-pluggable CPUs
-#
-echo 0 > $NOTIFIER_ERR_INJECT_DIR/actions/CPU_UP_PREPARE/error
-for cpu in `hotplaggable_offline_cpus`; do
-       online_cpu_expect_success $cpu
-done
-
-#
-# Test CPU hot-remove error handling (online => offline)
-#
-echo $error > $NOTIFIER_ERR_INJECT_DIR/actions/CPU_DOWN_PREPARE/error
-for cpu in `hotpluggable_online_cpus`; do
-       offline_cpu_expect_fail $cpu
-done
+online_all_hot_pluggable_cpus
 
-echo 0 > $NOTIFIER_ERR_INJECT_DIR/actions/CPU_DOWN_PREPARE/error
-/sbin/modprobe -q -r cpu-notifier-error-inject
+exit $retval