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Diffstat (limited to 'lib/cpu-notifier-error-inject.c')
-rw-r--r--lib/cpu-notifier-error-inject.c63
1 files changed, 25 insertions, 38 deletions
diff --git a/lib/cpu-notifier-error-inject.c b/lib/cpu-notifier-error-inject.c
index 4dc2032..707ca24 100644
--- a/lib/cpu-notifier-error-inject.c
+++ b/lib/cpu-notifier-error-inject.c
@@ -1,58 +1,45 @@
#include <linux/kernel.h>
-#include <linux/cpu.h>
#include <linux/module.h>
-#include <linux/notifier.h>
+#include <linux/cpu.h>
-static int priority;
-static int cpu_up_prepare_error;
-static int cpu_down_prepare_error;
+#include "notifier-error-inject.h"
+static int priority;
module_param(priority, int, 0);
MODULE_PARM_DESC(priority, "specify cpu notifier priority");
-module_param(cpu_up_prepare_error, int, 0644);
-MODULE_PARM_DESC(cpu_up_prepare_error,
- "specify error code to inject CPU_UP_PREPARE action");
-
-module_param(cpu_down_prepare_error, int, 0644);
-MODULE_PARM_DESC(cpu_down_prepare_error,
- "specify error code to inject CPU_DOWN_PREPARE action");
-
-static int err_inject_cpu_callback(struct notifier_block *nfb,
- unsigned long action, void *hcpu)
-{
- int err = 0;
-
- switch (action) {
- case CPU_UP_PREPARE:
- case CPU_UP_PREPARE_FROZEN:
- err = cpu_up_prepare_error;
- break;
- case CPU_DOWN_PREPARE:
- case CPU_DOWN_PREPARE_FROZEN:
- err = cpu_down_prepare_error;
- break;
+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) },
+ {}
}
- if (err)
- printk(KERN_INFO "Injecting error (%d) at cpu notifier\n", err);
-
- return notifier_from_errno(err);
-}
-
-static struct notifier_block err_inject_cpu_notifier = {
- .notifier_call = err_inject_cpu_callback,
};
+static struct dentry *dir;
+
static int err_inject_init(void)
{
- err_inject_cpu_notifier.priority = priority;
+ 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);
+
+ err = register_hotcpu_notifier(&cpu_notifier_err_inject.nb);
+ if (err)
+ debugfs_remove_recursive(dir);
- return register_hotcpu_notifier(&err_inject_cpu_notifier);
+ return err;
}
static void err_inject_exit(void)
{
- unregister_hotcpu_notifier(&err_inject_cpu_notifier);
+ unregister_hotcpu_notifier(&cpu_notifier_err_inject.nb);
+ debugfs_remove_recursive(dir);
}
module_init(err_inject_init);