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authorAkinobu Mita <akinobu.mita@gmail.com>2006-12-08 05:39:43 -0500
committerLinus Torvalds <torvalds@woody.osdl.org>2006-12-08 11:29:02 -0500
commit6ff1cb355e628f8fc55fa2d01e269e5e1bbc2fe9 (patch)
tree393d94b6d7585e4c804d6415afaa11e1d6ec350d /include/linux
parentde1ba09b214056365d9082982905b255caafb7a2 (diff)
[PATCH] fault-injection capabilities infrastructure
This patch provides base functions implement to fault-injection capabilities. - The function should_fail() is taken from failmalloc-1.0 (http://www.nongnu.org/failmalloc/) [akpm@osdl.org: cleanups, comments, add __init] Cc: <okuji@enbug.org> Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Signed-off-by: Don Mullis <dwm@meer.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/fault-inject.h69
1 files changed, 69 insertions, 0 deletions
diff --git a/include/linux/fault-inject.h b/include/linux/fault-inject.h
new file mode 100644
index 000000000000..4df4902bc8d8
--- /dev/null
+++ b/include/linux/fault-inject.h
@@ -0,0 +1,69 @@
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 */
14struct fault_attr {
15 unsigned long probability;
16 unsigned long interval;
17 atomic_t times;
18 atomic_t space;
19 unsigned long verbose;
20
21 unsigned long count;
22
23#ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
24
25 struct {
26 struct dentry *dir;
27
28 struct dentry *probability_file;
29 struct dentry *interval_file;
30 struct dentry *times_file;
31 struct dentry *space_file;
32 struct dentry *verbose_file;
33 } dentries;
34
35#endif
36};
37
38#define FAULT_ATTR_INITIALIZER { \
39 .interval = 1, \
40 .times = ATOMIC_INIT(1), \
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);
45void should_fail_srandom(unsigned long entropy);
46int should_fail(struct fault_attr *attr, ssize_t size);
47
48#ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
49
50int init_fault_attr_dentries(struct fault_attr *attr, const char *name);
51void cleanup_fault_attr_dentries(struct fault_attr *attr);
52
53#else /* CONFIG_FAULT_INJECTION_DEBUG_FS */
54
55static inline int init_fault_attr_dentries(struct fault_attr *attr,
56 const char *name)
57{
58 return -ENODEV;
59}
60
61static inline void cleanup_fault_attr_dentries(struct fault_attr *attr)
62{
63}
64
65#endif /* CONFIG_FAULT_INJECTION_DEBUG_FS */
66
67#endif /* CONFIG_FAULT_INJECTION */
68
69#endif /* _LINUX_FAULT_INJECT_H */