| #ifndef _LINUX_FAULT_INJECT_H |
| #define _LINUX_FAULT_INJECT_H |
| |
| #ifdef CONFIG_FAULT_INJECTION |
| |
| #include <linux/types.h> |
| #include <linux/debugfs.h> |
| #include <linux/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 dentry *dir; |
| #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); |
| 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, unsigned long flags); |
| #else |
| static inline bool should_failslab(size_t size, gfp_t gfpflags, |
| unsigned long flags) |
| { |
| return false; |
| } |
| #endif /* CONFIG_FAILSLAB */ |
| |
| #endif /* _LINUX_FAULT_INJECT_H */ |