1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
|
#ifndef _LINUX_FAULT_INJECT_H
#define _LINUX_FAULT_INJECT_H
#ifdef CONFIG_FAULT_INJECTION
#include <linux/types.h>
#include <linux/debugfs.h>
#include <asm/atomic.h>
/*
* For explanation of the elements of this struct, see
* Documentation/fault-injection/fault-injection.txt
*/
struct fault_attr {
unsigned long probability;
unsigned long interval;
atomic_t times;
atomic_t space;
unsigned long verbose;
u32 task_filter;
unsigned long stacktrace_depth;
unsigned long require_start;
unsigned long require_end;
unsigned long reject_start;
unsigned long reject_end;
unsigned long count;
#ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
struct {
struct dentry *dir;
struct dentry *probability_file;
struct dentry *interval_file;
struct dentry *times_file;
struct dentry *space_file;
struct dentry *verbose_file;
struct dentry *task_filter_file;
struct dentry *stacktrace_depth_file;
struct dentry *require_start_file;
struct dentry *require_end_file;
struct dentry *reject_start_file;
struct dentry *reject_end_file;
} dentries;
#endif
};
#define FAULT_ATTR_INITIALIZER { \
.interval = 1, \
.times = ATOMIC_INIT(1), \
.require_end = ULONG_MAX, \
.stacktrace_depth = 32, \
.verbose = 2, \
}
#define DECLARE_FAULT_ATTR(name) struct fault_attr name = FAULT_ATTR_INITIALIZER
int setup_fault_attr(struct fault_attr *attr, char *str);
void should_fail_srandom(unsigned long entropy);
bool should_fail(struct fault_attr *attr, ssize_t size);
#ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
int init_fault_attr_dentries(struct fault_attr *attr, const char *name);
void cleanup_fault_attr_dentries(struct fault_attr *attr);
#else /* CONFIG_FAULT_INJECTION_DEBUG_FS */
static inline int init_fault_attr_dentries(struct fault_attr *attr,
const char *name)
{
return -ENODEV;
}
static inline void cleanup_fault_attr_dentries(struct fault_attr *attr)
{
}
#endif /* CONFIG_FAULT_INJECTION_DEBUG_FS */
#endif /* CONFIG_FAULT_INJECTION */
#ifdef CONFIG_FAILSLAB
extern bool should_failslab(size_t size, gfp_t gfpflags);
#else
static inline bool should_failslab(size_t size, gfp_t gfpflags)
{
return false;
}
#endif /* CONFIG_FAILSLAB */
#endif /* _LINUX_FAULT_INJECT_H */
|
