From 6ff1cb355e628f8fc55fa2d01e269e5e1bbc2fe9 Mon Sep 17 00:00:00 2001 From: Akinobu Mita Date: Fri, 8 Dec 2006 02:39:43 -0800 Subject: [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: Signed-off-by: Akinobu Mita Signed-off-by: Don Mullis Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/fault-inject.h | 69 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 69 insertions(+) create mode 100644 include/linux/fault-inject.h (limited to 'include') 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 @@ +#ifndef _LINUX_FAULT_INJECT_H +#define _LINUX_FAULT_INJECT_H + +#ifdef CONFIG_FAULT_INJECTION + +#include +#include +#include + +/* + * 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; + + 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; + } dentries; + +#endif +}; + +#define FAULT_ATTR_INITIALIZER { \ + .interval = 1, \ + .times = ATOMIC_INIT(1), \ + } + +#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); +int 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 */ + +#endif /* _LINUX_FAULT_INJECT_H */ -- cgit v1.2.1