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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 <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 | |
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 |
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 |
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