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 <linux/atomic.h> 9 10 /* 11 * For explanation of the elements of this struct, see 12 * Documentation/fault-injection/fault-injection.txt 13 */ 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; 26 27 unsigned long count; 28 }; 29 30 #define FAULT_ATTR_INITIALIZER { \ 31 .interval = 1, \ 32 .times = ATOMIC_INIT(1), \ 33 .require_end = ULONG_MAX, \ 34 .stacktrace_depth = 32, \ 35 .verbose = 2, \ 36 } 37 38 #define DECLARE_FAULT_ATTR(name) struct fault_attr name = FAULT_ATTR_INITIALIZER 39 int setup_fault_attr(struct fault_attr *attr, char *str); 40 bool should_fail(struct fault_attr *attr, ssize_t size); 41 42 #ifdef CONFIG_FAULT_INJECTION_DEBUG_FS 43 44 struct dentry *fault_create_debugfs_attr(const char *name, 45 struct dentry *parent, struct fault_attr *attr); 46 47 #else /* CONFIG_FAULT_INJECTION_DEBUG_FS */ 48 49 static inline struct dentry *fault_create_debugfs_attr(const char *name, 50 struct dentry *parent, struct fault_attr *attr) 51 { 52 return ERR_PTR(-ENODEV); 53 } 54 55 #endif /* CONFIG_FAULT_INJECTION_DEBUG_FS */ 56 57 #endif /* CONFIG_FAULT_INJECTION */ 58 59 #ifdef CONFIG_FAILSLAB 60 extern bool should_failslab(size_t size, gfp_t gfpflags, unsigned long flags); 61 #else 62 static inline bool should_failslab(size_t size, gfp_t gfpflags, 63 unsigned long flags) 64 { 65 return false; 66 } 67 #endif /* CONFIG_FAILSLAB */ 68 69 #endif /* _LINUX_FAULT_INJECT_H */ 70