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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 <asm/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 {

                struct dentry *dir;

                struct dentry *probability_file;

                struct dentry *interval_file;

                struct dentry *times_file;

                struct dentry *space_file;

                struct dentry *verbose_file;

                struct dentry *task_filter_file;

                struct dentry *stacktrace_depth_file;

                struct dentry *require_start_file;

                struct dentry *require_end_file;

                struct dentry *reject_start_file;

                struct dentry *reject_end_file;

        } dentries;

#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);

void should_fail_srandom(unsigned long entropy);

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 */

#endif /* _LINUX_FAULT_INJECT_H */