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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; | |
f4f154fd | 20 | u32 task_filter; |
329409ae AM |
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; | |
6ff1cb35 AM |
26 | |
27 | unsigned long count; | |
28 | ||
29 | #ifdef CONFIG_FAULT_INJECTION_DEBUG_FS | |
7f5ddcc8 | 30 | struct dentry *dir; |
6ff1cb35 AM |
31 | #endif |
32 | }; | |
33 | ||
34 | #define FAULT_ATTR_INITIALIZER { \ | |
35 | .interval = 1, \ | |
36 | .times = ATOMIC_INIT(1), \ | |
329409ae AM |
37 | .require_end = ULONG_MAX, \ |
38 | .stacktrace_depth = 32, \ | |
6b1b60f4 | 39 | .verbose = 2, \ |
6ff1cb35 AM |
40 | } |
41 | ||
42 | #define DECLARE_FAULT_ATTR(name) struct fault_attr name = FAULT_ATTR_INITIALIZER | |
43 | int setup_fault_attr(struct fault_attr *attr, char *str); | |
08b3df2d | 44 | bool should_fail(struct fault_attr *attr, ssize_t size); |
6ff1cb35 AM |
45 | |
46 | #ifdef CONFIG_FAULT_INJECTION_DEBUG_FS | |
47 | ||
48 | int init_fault_attr_dentries(struct fault_attr *attr, const char *name); | |
49 | void cleanup_fault_attr_dentries(struct fault_attr *attr); | |
50 | ||
51 | #else /* CONFIG_FAULT_INJECTION_DEBUG_FS */ | |
52 | ||
53 | static inline int init_fault_attr_dentries(struct fault_attr *attr, | |
54 | const char *name) | |
55 | { | |
56 | return -ENODEV; | |
57 | } | |
58 | ||
59 | static inline void cleanup_fault_attr_dentries(struct fault_attr *attr) | |
60 | { | |
61 | } | |
62 | ||
63 | #endif /* CONFIG_FAULT_INJECTION_DEBUG_FS */ | |
64 | ||
65 | #endif /* CONFIG_FAULT_INJECTION */ | |
66 | ||
773ff60e | 67 | #ifdef CONFIG_FAILSLAB |
4c13dd3b | 68 | extern bool should_failslab(size_t size, gfp_t gfpflags, unsigned long flags); |
773ff60e | 69 | #else |
4c13dd3b DM |
70 | static inline bool should_failslab(size_t size, gfp_t gfpflags, |
71 | unsigned long flags) | |
773ff60e AM |
72 | { |
73 | return false; | |
74 | } | |
75 | #endif /* CONFIG_FAILSLAB */ | |
76 | ||
6ff1cb35 | 77 | #endif /* _LINUX_FAULT_INJECT_H */ |