root/include/linux/fault-inject.h

INCLUDED FROM

DEFINITIONS

1. fault_create_debugfs_attr
2. should_failslab

#ifndef _LINUX_FAULT_INJECT_H
#define _LINUX_FAULT_INJECT_H

#ifdef CONFIG_FAULT_INJECTION

#include <linux/types.h>
#include <linux/debugfs.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;
        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;
};

#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);
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 */