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Akinobu Mita6ff1cb32006-12-08 02:39:43 -08001#ifndef _LINUX_FAULT_INJECT_H
2#define _LINUX_FAULT_INJECT_H
3
4#ifdef CONFIG_FAULT_INJECTION
5
6#include <linux/types.h>
7#include <linux/debugfs.h>
8#include <asm/atomic.h>
9
10/*
11 * For explanation of the elements of this struct, see
12 * Documentation/fault-injection/fault-injection.txt
13 */
14struct fault_attr {
15 unsigned long probability;
16 unsigned long interval;
17 atomic_t times;
18 atomic_t space;
19 unsigned long verbose;
Akinobu Mitaf4f154f2006-12-08 02:39:47 -080020 u32 task_filter;
Akinobu Mita6ff1cb32006-12-08 02:39:43 -080021
22 unsigned long count;
23
24#ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
25
26 struct {
27 struct dentry *dir;
28
29 struct dentry *probability_file;
30 struct dentry *interval_file;
31 struct dentry *times_file;
32 struct dentry *space_file;
33 struct dentry *verbose_file;
Akinobu Mitaf4f154f2006-12-08 02:39:47 -080034 struct dentry *task_filter_file;
Akinobu Mita6ff1cb32006-12-08 02:39:43 -080035 } dentries;
36
37#endif
38};
39
40#define FAULT_ATTR_INITIALIZER { \
41 .interval = 1, \
42 .times = ATOMIC_INIT(1), \
43 }
44
45#define DECLARE_FAULT_ATTR(name) struct fault_attr name = FAULT_ATTR_INITIALIZER
46int setup_fault_attr(struct fault_attr *attr, char *str);
47void should_fail_srandom(unsigned long entropy);
48int should_fail(struct fault_attr *attr, ssize_t size);
49
50#ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
51
52int init_fault_attr_dentries(struct fault_attr *attr, const char *name);
53void cleanup_fault_attr_dentries(struct fault_attr *attr);
54
55#else /* CONFIG_FAULT_INJECTION_DEBUG_FS */
56
57static inline int init_fault_attr_dentries(struct fault_attr *attr,
58 const char *name)
59{
60 return -ENODEV;
61}
62
63static inline void cleanup_fault_attr_dentries(struct fault_attr *attr)
64{
65}
66
67#endif /* CONFIG_FAULT_INJECTION_DEBUG_FS */
68
69#endif /* CONFIG_FAULT_INJECTION */
70
71#endif /* _LINUX_FAULT_INJECT_H */