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/ratelimit.h> 9 #include <linux/atomic.h> 10 11 /* 12 * For explanation of the elements of this struct, see 13 * Documentation/fault-injection/fault-injection.txt 14 */ 15 struct fault_attr { 16 unsigned long probability; 17 unsigned long interval; 18 atomic_t times; 19 atomic_t space; 20 unsigned long verbose; 21 u32 task_filter; 22 unsigned long stacktrace_depth; 23 unsigned long require_start; 24 unsigned long require_end; 25 unsigned long reject_start; 26 unsigned long reject_end; 27 28 unsigned long count; 29 struct ratelimit_state ratelimit_state; 30 struct dentry *dname; 31 }; 32 33 #define FAULT_ATTR_INITIALIZER { \ 34 .interval = 1, \ 35 .times = ATOMIC_INIT(1), \ 36 .require_end = ULONG_MAX, \ 37 .stacktrace_depth = 32, \ 38 .ratelimit_state = RATELIMIT_STATE_INIT_DISABLED, \ 39 .verbose = 2, \ 40 .dname = NULL, \ 41 } 42 43 #define DECLARE_FAULT_ATTR(name) struct fault_attr name = FAULT_ATTR_INITIALIZER 44 int setup_fault_attr(struct fault_attr *attr, char *str); 45 bool should_fail(struct fault_attr *attr, ssize_t size); 46 47 #ifdef CONFIG_FAULT_INJECTION_DEBUG_FS 48 49 struct dentry *fault_create_debugfs_attr(const char *name, 50 struct dentry *parent, struct fault_attr *attr); 51 52 #else /* CONFIG_FAULT_INJECTION_DEBUG_FS */ 53 54 static inline struct dentry *fault_create_debugfs_attr(const char *name, 55 struct dentry *parent, struct fault_attr *attr) 56 { 57 return ERR_PTR(-ENODEV); 58 } 59 60 #endif /* CONFIG_FAULT_INJECTION_DEBUG_FS */ 61 62 #endif /* CONFIG_FAULT_INJECTION */ 63 64 #ifdef CONFIG_FAILSLAB 65 extern bool should_failslab(size_t size, gfp_t gfpflags, unsigned long flags); 66 #else 67 static inline bool should_failslab(size_t size, gfp_t gfpflags, 68 unsigned long flags) 69 { 70 return false; 71 } 72 #endif /* CONFIG_FAILSLAB */ 73 74 #endif /* _LINUX_FAULT_INJECT_H */ 75