1/* SPDX-License-Identifier: GPL-2.0 */
 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>
 9#include <linux/ratelimit.h>
10#include <linux/atomic.h>
11
12/*
13 * For explanation of the elements of this struct, see
14 * Documentation/fault-injection/fault-injection.rst
15 */
16struct fault_attr {
17	unsigned long probability;
18	unsigned long interval;
19	atomic_t times;
20	atomic_t space;
21	unsigned long verbose;
22	bool task_filter;
23	unsigned long stacktrace_depth;
24	unsigned long require_start;
25	unsigned long require_end;
26	unsigned long reject_start;
27	unsigned long reject_end;
28
29	unsigned long count;
30	struct ratelimit_state ratelimit_state;
31	struct dentry *dname;
32};
33
34#define FAULT_ATTR_INITIALIZER {					\
35		.interval = 1,						\
36		.times = ATOMIC_INIT(1),				\
37		.require_end = ULONG_MAX,				\
38		.stacktrace_depth = 32,					\
39		.ratelimit_state = RATELIMIT_STATE_INIT_DISABLED,	\
40		.verbose = 2,						\
41		.dname = NULL,						\
42	}
43
44#define DECLARE_FAULT_ATTR(name) struct fault_attr name = FAULT_ATTR_INITIALIZER
45int setup_fault_attr(struct fault_attr *attr, char *str);
46bool should_fail(struct fault_attr *attr, ssize_t size);
47
48#ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
49
50struct dentry *fault_create_debugfs_attr(const char *name,
51			struct dentry *parent, struct fault_attr *attr);
52
53#else /* CONFIG_FAULT_INJECTION_DEBUG_FS */
54
55static inline struct dentry *fault_create_debugfs_attr(const char *name,
56			struct dentry *parent, struct fault_attr *attr)
57{
58	return ERR_PTR(-ENODEV);
59}
60
61#endif /* CONFIG_FAULT_INJECTION_DEBUG_FS */
62
63#endif /* CONFIG_FAULT_INJECTION */
64
65struct kmem_cache;
66
67int should_failslab(struct kmem_cache *s, gfp_t gfpflags);
68#ifdef CONFIG_FAILSLAB
69extern bool __should_failslab(struct kmem_cache *s, gfp_t gfpflags);
70#else
71static inline bool __should_failslab(struct kmem_cache *s, gfp_t gfpflags)
72{
73	return false;
74}
75#endif /* CONFIG_FAILSLAB */
76
77#endif /* _LINUX_FAULT_INJECT_H */

 
 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/ratelimit.h>
 9#include <linux/atomic.h>
10
11/*
12 * For explanation of the elements of this struct, see
13 * Documentation/fault-injection/fault-injection.txt
14 */
15struct fault_attr {
16	unsigned long probability;
17	unsigned long interval;
18	atomic_t times;
19	atomic_t space;
20	unsigned long verbose;
21	bool task_filter;
22	unsigned long stacktrace_depth;
23	unsigned long require_start;
24	unsigned long require_end;
25	unsigned long reject_start;
26	unsigned long reject_end;
27
28	unsigned long count;
29	struct ratelimit_state ratelimit_state;
30	struct dentry *dname;
31};
32
33#define FAULT_ATTR_INITIALIZER {					\
34		.interval = 1,						\
35		.times = ATOMIC_INIT(1),				\
36		.require_end = ULONG_MAX,				\
37		.stacktrace_depth = 32,					\
38		.ratelimit_state = RATELIMIT_STATE_INIT_DISABLED,	\
39		.verbose = 2,						\
40		.dname = NULL,						\
41	}
42
43#define DECLARE_FAULT_ATTR(name) struct fault_attr name = FAULT_ATTR_INITIALIZER
44int setup_fault_attr(struct fault_attr *attr, char *str);
45bool should_fail(struct fault_attr *attr, ssize_t size);
46
47#ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
48
49struct dentry *fault_create_debugfs_attr(const char *name,
50			struct dentry *parent, struct fault_attr *attr);
51
52#else /* CONFIG_FAULT_INJECTION_DEBUG_FS */
53
54static inline struct dentry *fault_create_debugfs_attr(const char *name,
55			struct dentry *parent, struct fault_attr *attr)
56{
57	return ERR_PTR(-ENODEV);
58}
59
60#endif /* CONFIG_FAULT_INJECTION_DEBUG_FS */
61
62#endif /* CONFIG_FAULT_INJECTION */
63
 
 
 
64#ifdef CONFIG_FAILSLAB
65extern bool should_failslab(struct kmem_cache *s, gfp_t gfpflags);
66#else
67static inline bool should_failslab(struct kmem_cache *s, gfp_t gfpflags)
68{
69	return false;
70}
71#endif /* CONFIG_FAILSLAB */
72
73#endif /* _LINUX_FAULT_INJECT_H */