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#ifndef _LINUX_FAULT_INJECT_H
#define _LINUX_FAULT_INJECT_H
#ifdef CONFIG_FAULT_INJECTION
#include <linux/types.h>
#include <linux/debugfs.h>
#include <linux/ratelimit.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;
bool 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;
struct ratelimit_state ratelimit_state;
struct dentry *dname;
};
#define FAULT_ATTR_INITIALIZER { \
.interval = 1, \
.times = ATOMIC_INIT(1), \
.require_end = ULONG_MAX, \
.stacktrace_depth = 32, \
.ratelimit_state = RATELIMIT_STATE_INIT_DISABLED, \
.verbose = 2, \
.dname = NULL, \
}
#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
struct dentry *fault_create_debugfs_attr(const char *name,
struct dentry *parent, struct fault_attr *attr);
#else /* CONFIG_FAULT_INJECTION_DEBUG_FS */
static inline struct dentry *fault_create_debugfs_attr(const char *name,
struct dentry *parent, struct fault_attr *attr)
{
return ERR_PTR(-ENODEV);
}
#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 */