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Commit 08dfb4dd authored by Akinobu Mita's avatar Akinobu Mita Committed by Linus Torvalds
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powerpc: pSeries reconfig notifier error injection module 



This provides the ability to inject artifical errors to pSeries reconfig
notifier chain callbacks.  It is controlled through debugfs interface
under /sys/kernel/debug/notifier-error-inject/pSeries-reconfig

If the notifier call chain should be failed with some events
notified, write the error code to "actions/<notifier event>/error".

Signed-off-by: default avatarAkinobu Mita <akinobu.mita@gmail.com>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: Greg KH <greg@kroah.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Michael Ellerman <michael@ellerman.id.au>
Cc: Dave Jones <davej@redhat.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 9579f5bd

lib/Kconfig.debug

+17 −0
Original line number Original line Diff line number Diff line
@@ -1166,6 +1166,23 @@ config MEMORY_NOTIFIER_ERROR_INJECT 




	  If unsure, say N.

	  If unsure, say N.





config PSERIES_RECONFIG_NOTIFIER_ERROR_INJECT

	tristate "pSeries reconfig notifier error injection module"

	depends on PPC_PSERIES && NOTIFIER_ERROR_INJECTION

	help

	  This option provides the ability to inject artifical errors to

	  pSeries reconfig notifier chain callbacks.  It is controlled

	  through debugfs interface under

	  /sys/kernel/debug/notifier-error-inject/pSeries-reconfig/



	  If the notifier call chain should be failed with some events

	  notified, write the error code to "actions/<notifier event>/error".



	  To compile this code as a module, choose M here: the module will

	  be called memory-notifier-error-inject.



	  If unsure, say N.



config FAULT_INJECTION

config FAULT_INJECTION

	bool "Fault-injection framework"

	bool "Fault-injection framework"

	depends on DEBUG_KERNEL

	depends on DEBUG_KERNEL

lib/Makefile

+2 −0
Original line number Original line Diff line number Diff line
@@ -94,6 +94,8 @@ obj-$(CONFIG_NOTIFIER_ERROR_INJECTION) += notifier-error-inject.o 
obj-$(CONFIG_CPU_NOTIFIER_ERROR_INJECT) += cpu-notifier-error-inject.o

obj-$(CONFIG_CPU_NOTIFIER_ERROR_INJECT) += cpu-notifier-error-inject.o

obj-$(CONFIG_PM_NOTIFIER_ERROR_INJECT) += pm-notifier-error-inject.o

obj-$(CONFIG_PM_NOTIFIER_ERROR_INJECT) += pm-notifier-error-inject.o

obj-$(CONFIG_MEMORY_NOTIFIER_ERROR_INJECT) += memory-notifier-error-inject.o

obj-$(CONFIG_MEMORY_NOTIFIER_ERROR_INJECT) += memory-notifier-error-inject.o

obj-$(CONFIG_PSERIES_RECONFIG_NOTIFIER_ERROR_INJECT) += \

	pSeries-reconfig-notifier-error-inject.o





lib-$(CONFIG_GENERIC_BUG) += bug.o

lib-$(CONFIG_GENERIC_BUG) += bug.o

lib/pSeries-reconfig-notifier-error-inject.c

0 → 100644
+51 −0
Original line number Original line Diff line number Diff line 
#include <linux/kernel.h>

#include <linux/module.h>



#include <asm/pSeries_reconfig.h>



#include "notifier-error-inject.h"



static int priority;

module_param(priority, int, 0);

MODULE_PARM_DESC(priority, "specify pSeries reconfig notifier priority");



static struct notifier_err_inject reconfig_err_inject = {

	.actions = {

		{ NOTIFIER_ERR_INJECT_ACTION(PSERIES_RECONFIG_ADD) },

		{ NOTIFIER_ERR_INJECT_ACTION(PSERIES_RECONFIG_REMOVE) },

		{ NOTIFIER_ERR_INJECT_ACTION(PSERIES_DRCONF_MEM_ADD) },

		{ NOTIFIER_ERR_INJECT_ACTION(PSERIES_DRCONF_MEM_REMOVE) },

		{}

	}

};



static struct dentry *dir;



static int err_inject_init(void)

{

	int err;



	dir = notifier_err_inject_init("pSeries-reconfig",

		notifier_err_inject_dir, &reconfig_err_inject, priority);

	if (IS_ERR(dir))

		return PTR_ERR(dir);



	err = pSeries_reconfig_notifier_register(&reconfig_err_inject.nb);

	if (err)

		debugfs_remove_recursive(dir);



	return err;

}



static void err_inject_exit(void)

{

	pSeries_reconfig_notifier_unregister(&reconfig_err_inject.nb);

	debugfs_remove_recursive(dir);

}



module_init(err_inject_init);

module_exit(err_inject_exit);



MODULE_DESCRIPTION("pSeries reconfig notifier error injection module");

MODULE_LICENSE("GPL");

MODULE_AUTHOR("Akinobu Mita <akinobu.mita@gmail.com>");