diff options
| -rw-r--r-- | include/linux/cpuhotplug.h | 1 | ||||
| -rw-r--r-- | lib/cpu-notifier-error-inject.c | 46 |
2 files changed, 41 insertions, 6 deletions
diff --git a/include/linux/cpuhotplug.h b/include/linux/cpuhotplug.h index 7706987..bb6231d 100644 --- a/include/linux/cpuhotplug.h +++ b/include/linux/cpuhotplug.h @@ -43,6 +43,7 @@ enum cpuhp_state { CPUHP_ARM_SHMOBILE_SCU_PREPARE, CPUHP_SH_SH3X_PREPARE, CPUHP_TIMERS_DEAD, + CPUHP_NOTF_ERR_INJ_PREPARE, CPUHP_BRINGUP_CPU, CPUHP_AP_IDLE_DEAD, CPUHP_AP_OFFLINE, diff --git a/lib/cpu-notifier-error-inject.c b/lib/cpu-notifier-error-inject.c index 707ca24..0e2c9a1 100644 --- a/lib/cpu-notifier-error-inject.c +++ b/lib/cpu-notifier-error-inject.c @@ -8,16 +8,47 @@ static int priority; module_param(priority, int, 0); MODULE_PARM_DESC(priority, "specify cpu notifier priority"); +#define UP_PREPARE 0 +#define UP_PREPARE_FROZEN 0 +#define DOWN_PREPARE 0 +#define DOWN_PREPARE_FROZEN 0 + static struct notifier_err_inject cpu_notifier_err_inject = { .actions = { - { NOTIFIER_ERR_INJECT_ACTION(CPU_UP_PREPARE) }, - { NOTIFIER_ERR_INJECT_ACTION(CPU_UP_PREPARE_FROZEN) }, - { NOTIFIER_ERR_INJECT_ACTION(CPU_DOWN_PREPARE) }, - { NOTIFIER_ERR_INJECT_ACTION(CPU_DOWN_PREPARE_FROZEN) }, + { NOTIFIER_ERR_INJECT_ACTION(UP_PREPARE) }, + { NOTIFIER_ERR_INJECT_ACTION(UP_PREPARE_FROZEN) }, + { NOTIFIER_ERR_INJECT_ACTION(DOWN_PREPARE) }, + { NOTIFIER_ERR_INJECT_ACTION(DOWN_PREPARE_FROZEN) }, {} } }; +static int notf_err_handle(struct notifier_err_inject_action *action) +{ + int ret; + + ret = action->error; + if (ret) + pr_info("Injecting error (%d) to %s\n", ret, action->name); + return ret; +} + +static int notf_err_inj_up_prepare(unsigned int cpu) +{ + if (!cpuhp_tasks_frozen) + return notf_err_handle(&cpu_notifier_err_inject.actions[0]); + else + return notf_err_handle(&cpu_notifier_err_inject.actions[1]); +} + +static int notf_err_inj_dead(unsigned int cpu) +{ + if (!cpuhp_tasks_frozen) + return notf_err_handle(&cpu_notifier_err_inject.actions[2]); + else + return notf_err_handle(&cpu_notifier_err_inject.actions[3]); +} + static struct dentry *dir; static int err_inject_init(void) @@ -29,7 +60,10 @@ static int err_inject_init(void) if (IS_ERR(dir)) return PTR_ERR(dir); - err = register_hotcpu_notifier(&cpu_notifier_err_inject.nb); + err = cpuhp_setup_state_nocalls(CPUHP_NOTF_ERR_INJ_PREPARE, + "cpu-err-notif:prepare", + notf_err_inj_up_prepare, + notf_err_inj_dead); if (err) debugfs_remove_recursive(dir); @@ -38,7 +72,7 @@ static int err_inject_init(void) static void err_inject_exit(void) { - unregister_hotcpu_notifier(&cpu_notifier_err_inject.nb); + cpuhp_remove_state_nocalls(CPUHP_NOTF_ERR_INJ_PREPARE); debugfs_remove_recursive(dir); } |
