LXR linux/include/linux/fault-inject.h

   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 */
  15struct fault_attr {
  16        unsigned long probability;
  17        unsigned long interval;
  18        atomic_t times;
  19        atomic_t space;
  20        unsigned long verbose;
  21        bool 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
  44int setup_fault_attr(struct fault_attr *attr, char *str);
  45bool should_fail(struct fault_attr *attr, ssize_t size);
  46
  47#ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
  48
  49struct 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
  54static 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
  65extern bool should_failslab(struct kmem_cache *s, gfp_t gfpflags);
  66#else
  67static inline bool should_failslab(struct kmem_cache *s, gfp_t gfpflags)
  68{
  69        return false;
  70}
  71#endif /* CONFIG_FAILSLAB */
  72
  73#endif /* _LINUX_FAULT_INJECT_H */
  74