Linux 2.6.33-rc2
[pohmelfs.git] / include / linux / fault-inject.h
blob06ca9b21dad23b0d6753d0a92d6cbc2acba81f40
1 #ifndef _LINUX_FAULT_INJECT_H
2 #define _LINUX_FAULT_INJECT_H
4 #ifdef CONFIG_FAULT_INJECTION
6 #include <linux/types.h>
7 #include <linux/debugfs.h>
8 #include <asm/atomic.h>
11 * For explanation of the elements of this struct, see
12 * Documentation/fault-injection/fault-injection.txt
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;
27 unsigned long count;
29 #ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
31 struct {
32 struct dentry *dir;
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;
47 #endif
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, \
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);
63 #ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
65 int init_fault_attr_dentries(struct fault_attr *attr, const char *name);
66 void cleanup_fault_attr_dentries(struct fault_attr *attr);
68 #else /* CONFIG_FAULT_INJECTION_DEBUG_FS */
70 static inline int init_fault_attr_dentries(struct fault_attr *attr,
71 const char *name)
73 return -ENODEV;
76 static inline void cleanup_fault_attr_dentries(struct fault_attr *attr)
80 #endif /* CONFIG_FAULT_INJECTION_DEBUG_FS */
82 #endif /* CONFIG_FAULT_INJECTION */
84 #ifdef CONFIG_FAILSLAB
85 extern bool should_failslab(size_t size, gfp_t gfpflags);
86 #else
87 static inline bool should_failslab(size_t size, gfp_t gfpflags)
89 return false;
91 #endif /* CONFIG_FAILSLAB */
93 #endif /* _LINUX_FAULT_INJECT_H */