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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
6ff1cb35 AM |
2 | #ifndef _LINUX_FAULT_INJECT_H |
3 | #define _LINUX_FAULT_INJECT_H | |
4 | ||
5 | #ifdef CONFIG_FAULT_INJECTION | |
6 | ||
7 | #include <linux/types.h> | |
8 | #include <linux/debugfs.h> | |
4668c7a2 | 9 | #include <linux/configfs.h> |
6adc4a22 | 10 | #include <linux/ratelimit.h> |
60063497 | 11 | #include <linux/atomic.h> |
6ff1cb35 AM |
12 | |
13 | /* | |
14 | * For explanation of the elements of this struct, see | |
10ffebbe | 15 | * Documentation/fault-injection/fault-injection.rst |
6ff1cb35 AM |
16 | */ |
17 | struct fault_attr { | |
18 | unsigned long probability; | |
19 | unsigned long interval; | |
20 | atomic_t times; | |
21 | atomic_t space; | |
22 | unsigned long verbose; | |
621a5f7a | 23 | bool task_filter; |
329409ae AM |
24 | unsigned long stacktrace_depth; |
25 | unsigned long require_start; | |
26 | unsigned long require_end; | |
27 | unsigned long reject_start; | |
28 | unsigned long reject_end; | |
6ff1cb35 AM |
29 | |
30 | unsigned long count; | |
6adc4a22 DM |
31 | struct ratelimit_state ratelimit_state; |
32 | struct dentry *dname; | |
6ff1cb35 AM |
33 | }; |
34 | ||
ea4452de QZ |
35 | enum fault_flags { |
36 | FAULT_NOWARN = 1 << 0, | |
37 | }; | |
38 | ||
6adc4a22 DM |
39 | #define FAULT_ATTR_INITIALIZER { \ |
40 | .interval = 1, \ | |
41 | .times = ATOMIC_INIT(1), \ | |
42 | .require_end = ULONG_MAX, \ | |
43 | .stacktrace_depth = 32, \ | |
44 | .ratelimit_state = RATELIMIT_STATE_INIT_DISABLED, \ | |
45 | .verbose = 2, \ | |
46 | .dname = NULL, \ | |
6ff1cb35 AM |
47 | } |
48 | ||
49 | #define DECLARE_FAULT_ATTR(name) struct fault_attr name = FAULT_ATTR_INITIALIZER | |
50 | int setup_fault_attr(struct fault_attr *attr, char *str); | |
ea4452de | 51 | bool should_fail_ex(struct fault_attr *attr, ssize_t size, int flags); |
08b3df2d | 52 | bool should_fail(struct fault_attr *attr, ssize_t size); |
6ff1cb35 AM |
53 | |
54 | #ifdef CONFIG_FAULT_INJECTION_DEBUG_FS | |
55 | ||
dd48c085 AM |
56 | struct dentry *fault_create_debugfs_attr(const char *name, |
57 | struct dentry *parent, struct fault_attr *attr); | |
6ff1cb35 AM |
58 | |
59 | #else /* CONFIG_FAULT_INJECTION_DEBUG_FS */ | |
60 | ||
dd48c085 AM |
61 | static inline struct dentry *fault_create_debugfs_attr(const char *name, |
62 | struct dentry *parent, struct fault_attr *attr) | |
6ff1cb35 | 63 | { |
dd48c085 | 64 | return ERR_PTR(-ENODEV); |
6ff1cb35 AM |
65 | } |
66 | ||
67 | #endif /* CONFIG_FAULT_INJECTION_DEBUG_FS */ | |
68 | ||
4668c7a2 AM |
69 | #ifdef CONFIG_FAULT_INJECTION_CONFIGFS |
70 | ||
71 | struct fault_config { | |
72 | struct fault_attr attr; | |
73 | struct config_group group; | |
74 | }; | |
75 | ||
76 | void fault_config_init(struct fault_config *config, const char *name); | |
77 | ||
78 | #else /* CONFIG_FAULT_INJECTION_CONFIGFS */ | |
79 | ||
80 | struct fault_config { | |
81 | }; | |
82 | ||
83 | static inline void fault_config_init(struct fault_config *config, | |
84 | const char *name) | |
85 | { | |
86 | } | |
87 | ||
88 | #endif /* CONFIG_FAULT_INJECTION_CONFIGFS */ | |
89 | ||
6ff1cb35 AM |
90 | #endif /* CONFIG_FAULT_INJECTION */ |
91 | ||
cc689c5b IM |
92 | struct kmem_cache; |
93 | ||
1e7a8181 VB |
94 | bool should_fail_alloc_page(gfp_t gfp_mask, unsigned int order); |
95 | ||
4f6923fb | 96 | int should_failslab(struct kmem_cache *s, gfp_t gfpflags); |
773ff60e | 97 | #ifdef CONFIG_FAILSLAB |
4f6923fb | 98 | extern bool __should_failslab(struct kmem_cache *s, gfp_t gfpflags); |
773ff60e | 99 | #else |
4f6923fb | 100 | static inline bool __should_failslab(struct kmem_cache *s, gfp_t gfpflags) |
773ff60e AM |
101 | { |
102 | return false; | |
103 | } | |
104 | #endif /* CONFIG_FAILSLAB */ | |
105 | ||
6ff1cb35 | 106 | #endif /* _LINUX_FAULT_INJECT_H */ |