[PATCH] fault injection: process filtering for fault-injection capabilities
[linux-2.6.git] / include / linux / fault-inject.h
1 #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  */
14 struct fault_attr {
15         unsigned long probability;
16         unsigned long interval;
17         atomic_t times;
18         atomic_t space;
19         unsigned long verbose;
20         u32 task_filter;
21
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;
34                 struct dentry *task_filter_file;
35         } 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
46 int setup_fault_attr(struct fault_attr *attr, char *str);
47 void should_fail_srandom(unsigned long entropy);
48 int should_fail(struct fault_attr *attr, ssize_t size);
49
50 #ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
51
52 int init_fault_attr_dentries(struct fault_attr *attr, const char *name);
53 void cleanup_fault_attr_dentries(struct fault_attr *attr);
54
55 #else /* CONFIG_FAULT_INJECTION_DEBUG_FS */
56
57 static inline int init_fault_attr_dentries(struct fault_attr *attr,
58                                           const char *name)
59 {
60         return -ENODEV;
61 }
62
63 static 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 */