Eric Lee / smarc-fsl-linux-kernel

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lib/cpu-notifier-error-inject.c 1.95 KB

c9d221f86 Akinobu Mita fault-injection: ...	1	#include <linux/kernel.h>
c9d221f86 Akinobu Mita fault-injection: ...	2	#include <linux/module.h>
f5a9f52e2 Akinobu Mita cpu: rewrite cpu-...	3	#include <linux/cpu.h>
c9d221f86 Akinobu Mita fault-injection: ...	4
f5a9f52e2 Akinobu Mita cpu: rewrite cpu-...	5	#include "notifier-error-inject.h"
c9d221f86 Akinobu Mita fault-injection: ...	6
f5a9f52e2 Akinobu Mita cpu: rewrite cpu-...	7	static int priority;
c9d221f86 Akinobu Mita fault-injection: ...	8 9	module_param(priority, int, 0); MODULE_PARM_DESC(priority, "specify cpu notifier priority");
8c58898b3 Sebastian Andrzej Siewior fault-injection/c...	10 11 12 13	#define UP_PREPARE 0 #define UP_PREPARE_FROZEN 0 #define DOWN_PREPARE 0 #define DOWN_PREPARE_FROZEN 0
f5a9f52e2 Akinobu Mita cpu: rewrite cpu-...	14 15	static struct notifier_err_inject cpu_notifier_err_inject = { .actions = {
8c58898b3 Sebastian Andrzej Siewior fault-injection/c...	16 17 18 19	{ 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) },
f5a9f52e2 Akinobu Mita cpu: rewrite cpu-...	20	{}
c9d221f86 Akinobu Mita fault-injection: ...	21	}
c9d221f86 Akinobu Mita fault-injection: ...	22	};
8c58898b3 Sebastian Andrzej Siewior fault-injection/c...	23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48	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 ", 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]); }
f5a9f52e2 Akinobu Mita cpu: rewrite cpu-...	49	static struct dentry *dir;
c9d221f86 Akinobu Mita fault-injection: ...	50 51	static int err_inject_init(void) {
f5a9f52e2 Akinobu Mita cpu: rewrite cpu-...	52 53 54 55 56 57	int err; dir = notifier_err_inject_init("cpu", notifier_err_inject_dir, &cpu_notifier_err_inject, priority); if (IS_ERR(dir)) return PTR_ERR(dir);
8c58898b3 Sebastian Andrzej Siewior fault-injection/c...	58 59 60 61	err = cpuhp_setup_state_nocalls(CPUHP_NOTF_ERR_INJ_PREPARE, "cpu-err-notif:prepare", notf_err_inj_up_prepare, notf_err_inj_dead);
f5a9f52e2 Akinobu Mita cpu: rewrite cpu-...	62 63	if (err) debugfs_remove_recursive(dir);
c9d221f86 Akinobu Mita fault-injection: ...	64
f5a9f52e2 Akinobu Mita cpu: rewrite cpu-...	65	return err;
c9d221f86 Akinobu Mita fault-injection: ...	66 67 68 69	} static void err_inject_exit(void) {
8c58898b3 Sebastian Andrzej Siewior fault-injection/c...	70	cpuhp_remove_state_nocalls(CPUHP_NOTF_ERR_INJ_PREPARE);
f5a9f52e2 Akinobu Mita cpu: rewrite cpu-...	71	debugfs_remove_recursive(dir);
c9d221f86 Akinobu Mita fault-injection: ...	72 73 74 75 76 77 78 79	} module_init(err_inject_init); module_exit(err_inject_exit); MODULE_DESCRIPTION("CPU notifier error injection module"); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Akinobu Mita <akinobu.mita@gmail.com>");