From: Akinobu Mita <akinobu.mita@gmail.com>
To: linux-kernel@vger.kernel.org, akpm@linux-foundation.org
Cc: linuxppc-dev@lists.ozlabs.org, Paul Mackerras <paulus@samba.org>,
Akinobu Mita <akinobu.mita@gmail.com>
Subject: [PATCH -v5 5/6] powerpc: pSeries reconfig notifier error injection module
Date: Sat, 30 Jun 2012 14:59:29 +0900 [thread overview]
Message-ID: <1341035970-20490-6-git-send-email-akinobu.mita@gmail.com> (raw)
In-Reply-To: <1341035970-20490-1-git-send-email-akinobu.mita@gmail.com>
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: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: linuxppc-dev@lists.ozlabs.org
---
No changes since v4
lib/Kconfig.debug | 17 +++++++++
lib/Makefile | 2 +
lib/pSeries-reconfig-notifier-error-inject.c | 51 ++++++++++++++++++++++++++
3 files changed, 70 insertions(+)
create mode 100644 lib/pSeries-reconfig-notifier-error-inject.c
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 7cceddc..8f8e226 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -1166,6 +1166,23 @@ config MEMORY_NOTIFIER_ERROR_INJECT
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
bool "Fault-injection framework"
depends on DEBUG_KERNEL
diff --git a/lib/Makefile b/lib/Makefile
index a867aa5..d055cb1 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -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-$(CONFIG_PM_NOTIFIER_ERROR_INJECT) += pm-notifier-error-inject.o
obj-$(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
diff --git a/lib/pSeries-reconfig-notifier-error-inject.c b/lib/pSeries-reconfig-notifier-error-inject.c
new file mode 100644
index 0000000..7f7c98d
--- /dev/null
+++ b/lib/pSeries-reconfig-notifier-error-inject.c
@@ -0,0 +1,51 @@
+#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>");
--
1.7.10.4
next prev parent reply other threads:[~2012-06-30 7:35 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-06-30 5:59 [PATCH -v5 0/6] notifier error injection Akinobu Mita
2012-06-30 5:59 ` [PATCH -v5 1/6] fault-injection: " Akinobu Mita
2012-06-30 5:59 ` Akinobu Mita [this message]
2012-06-30 5:59 ` [PATCH -v5 6/6] fault-injection: add selftests for cpu and memory hotplug Akinobu Mita
2012-07-03 20:41 ` [PATCH -v5 0/6] notifier error injection Andrew Morton
2012-07-04 10:07 ` Akinobu Mita
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