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[PATCH] fault-injection capabilities infrastructure

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This patch provides base functions implement to fault-injection
capabilities.

- The function should_fail() is taken from failmalloc-1.0
  (http://www.nongnu.org/failmalloc/)

[akpm@osdl.org: cleanups, comments, add __init]
Cc: <okuji@enbug.org>
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Don Mullis <dwm@meer.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Akinobu Mita 2006-12-08 02:39:43 -08:00 • committed by Linus Torvalds
parent de1ba09b21
commit 6ff1cb355e
4 changed files with 265 additions and 0 deletions
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69
include/linux/fault-inject.h Normal file
View file

@ -0,0 +1,69 @@
#ifndef _LINUX_FAULT_INJECT_H
#define _LINUX_FAULT_INJECT_H
#ifdef CONFIG_FAULT_INJECTION
#include <linux/types.h>
#include <linux/debugfs.h>
#include <asm/atomic.h>
/*
* For explanation of the elements of this struct, see
* Documentation/fault-injection/fault-injection.txt
*/
struct fault_attr {
unsigned long probability;
unsigned long interval;
atomic_t times;
atomic_t space;
unsigned long verbose;
unsigned long count;
#ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
struct {
struct dentry *dir;
struct dentry *probability_file;
struct dentry *interval_file;
struct dentry *times_file;
struct dentry *space_file;
struct dentry *verbose_file;
} dentries;
#endif
};
#define FAULT_ATTR_INITIALIZER { \
.interval = 1, \
.times = ATOMIC_INIT(1), \
}
#define DECLARE_FAULT_ATTR(name) struct fault_attr name = FAULT_ATTR_INITIALIZER
int setup_fault_attr(struct fault_attr *attr, char *str);
void should_fail_srandom(unsigned long entropy);
int should_fail(struct fault_attr *attr, ssize_t size);
#ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
int init_fault_attr_dentries(struct fault_attr *attr, const char *name);
void cleanup_fault_attr_dentries(struct fault_attr *attr);
#else /* CONFIG_FAULT_INJECTION_DEBUG_FS */
static inline int init_fault_attr_dentries(struct fault_attr *attr,
const char *name)
{
return -ENODEV;
}
static inline void cleanup_fault_attr_dentries(struct fault_attr *attr)
{
}
#endif /* CONFIG_FAULT_INJECTION_DEBUG_FS */
#endif /* CONFIG_FAULT_INJECTION */
#endif /* _LINUX_FAULT_INJECT_H */