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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; |
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 | #ifdef CONFIG_FAULT_INJECTION_DEBUG_FS |
30 | |
31 | struct { |
32 | struct dentry *dir; |
33 | |
34 | struct dentry *probability_file; |
35 | struct dentry *interval_file; |
36 | struct dentry *times_file; |
37 | struct dentry *space_file; |
38 | struct dentry *verbose_file; |
39 | struct dentry *task_filter_file; |
40 | struct dentry *stacktrace_depth_file; |
41 | struct dentry *require_start_file; |
42 | struct dentry *require_end_file; |
43 | struct dentry *reject_start_file; |
44 | struct dentry *reject_end_file; |
45 | } dentries; |
46 | |
47 | #endif |
48 | }; |
49 | |
50 | #define FAULT_ATTR_INITIALIZER { \ |
51 | .interval = 1, \ |
52 | .times = ATOMIC_INIT(1), \ |
53 | .require_end = ULONG_MAX, \ |
54 | .stacktrace_depth = 32, \ |
55 | .verbose = 2, \ |
56 | } |
57 | |
58 | #define DECLARE_FAULT_ATTR(name) struct fault_attr name = FAULT_ATTR_INITIALIZER |
59 | int setup_fault_attr(struct fault_attr *attr, char *str); |
60 | void should_fail_srandom(unsigned long entropy); |
61 | bool should_fail(struct fault_attr *attr, ssize_t size); |
62 | |
63 | #ifdef CONFIG_FAULT_INJECTION_DEBUG_FS |
64 | |
65 | int init_fault_attr_dentries(struct fault_attr *attr, const char *name); |
66 | void cleanup_fault_attr_dentries(struct fault_attr *attr); |
67 | |
68 | #else /* CONFIG_FAULT_INJECTION_DEBUG_FS */ |
69 | |
70 | static inline int init_fault_attr_dentries(struct fault_attr *attr, |
71 | const char *name) |
72 | { |
73 | return -ENODEV; |
74 | } |
75 | |
76 | static inline void cleanup_fault_attr_dentries(struct fault_attr *attr) |
77 | { |
78 | } |
79 | |
80 | #endif /* CONFIG_FAULT_INJECTION_DEBUG_FS */ |
81 | |
82 | #endif /* CONFIG_FAULT_INJECTION */ |
83 | |
84 | #ifdef CONFIG_FAILSLAB |
85 | extern bool should_failslab(size_t size, gfp_t gfpflags, unsigned long flags); |
86 | #else |
87 | static inline bool should_failslab(size_t size, gfp_t gfpflags, |
88 | unsigned long flags) |
89 | { |
90 | return false; |
91 | } |
92 | #endif /* CONFIG_FAILSLAB */ |
93 | |
94 | #endif /* _LINUX_FAULT_INJECT_H */ |
95 |
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