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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;
20
21 unsigned long count;
22
23#ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
24
25 struct {
26 struct dentry *dir;
27
28 struct dentry *probability_file;
29 struct dentry *interval_file;
30 struct dentry *times_file;
31 struct dentry *space_file;
32 struct dentry *verbose_file;
33 } dentries;
34
35#endif
36};
37
38#define FAULT_ATTR_INITIALIZER { \
39 .interval = 1, \
40 .times = ATOMIC_INIT(1), \
41 }
42
43#define DECLARE_FAULT_ATTR(name) struct fault_attr name = FAULT_ATTR_INITIALIZER
44int setup_fault_attr(struct fault_attr *attr, char *str);
45void should_fail_srandom(unsigned long entropy);
46int should_fail(struct fault_attr *attr, ssize_t size);
47
48#ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
49
50int init_fault_attr_dentries(struct fault_attr *attr, const char *name);
51void cleanup_fault_attr_dentries(struct fault_attr *attr);
52
53#else /* CONFIG_FAULT_INJECTION_DEBUG_FS */
54
55static inline int init_fault_attr_dentries(struct fault_attr *attr,
56 const char *name)
57{
58 return -ENODEV;
59}
60
61static inline void cleanup_fault_attr_dentries(struct fault_attr *attr)
62{
63}
64
65#endif /* CONFIG_FAULT_INJECTION_DEBUG_FS */
66
67#endif /* CONFIG_FAULT_INJECTION */
68
69#endif /* _LINUX_FAULT_INJECT_H */