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 <linux/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 unsigned long stacktrace_depth;
22 unsigned long require_start;
23 unsigned long require_end;
24 unsigned long reject_start;
25 unsigned long reject_end;
26
27 unsigned long count;
28 };
29
30 #define FAULT_ATTR_INITIALIZER { \
31 .interval = 1, \
32 .times = ATOMIC_INIT(1), \
33 .require_end = ULONG_MAX, \
34 .stacktrace_depth = 32, \
35 .verbose = 2, \
36 }
37
38 #define DECLARE_FAULT_ATTR(name) struct fault_attr name = FAULT_ATTR_INITIALIZER
39 int setup_fault_attr(struct fault_attr *attr, char *str);
40 bool should_fail(struct fault_attr *attr, ssize_t size);
41
42 #ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
43
44 struct dentry *fault_create_debugfs_attr(const char *name,
45 struct dentry *parent, struct fault_attr *attr);
46
47 #else /* CONFIG_FAULT_INJECTION_DEBUG_FS */
48
fault_create_debugfs_attr(const char * name,struct dentry * parent,struct fault_attr * attr)49 static inline struct dentry *fault_create_debugfs_attr(const char *name,
50 struct dentry *parent, struct fault_attr *attr)
51 {
52 return ERR_PTR(-ENODEV);
53 }
54
55 #endif /* CONFIG_FAULT_INJECTION_DEBUG_FS */
56
57 #endif /* CONFIG_FAULT_INJECTION */
58
59 #ifdef CONFIG_FAILSLAB
60 extern bool should_failslab(size_t size, gfp_t gfpflags, unsigned long flags);
61 #else
should_failslab(size_t size,gfp_t gfpflags,unsigned long flags)62 static inline bool should_failslab(size_t size, gfp_t gfpflags,
63 unsigned long flags)
64 {
65 return false;
66 }
67 #endif /* CONFIG_FAILSLAB */
68
69 #endif /* _LINUX_FAULT_INJECT_H */
70