root/include/linux/debugfs.h

INCLUDED FROM

DEFINITIONS

1. debugfs_create_file
2. debugfs_create_dir
3. debugfs_create_symlink
4. debugfs_remove
5. debugfs_remove_recursive
6. debugfs_rename
7. debugfs_create_u8
8. debugfs_create_u16
9. debugfs_create_u32
10. debugfs_create_u64
11. debugfs_create_x8
12. debugfs_create_x16
13. debugfs_create_x32
14. debugfs_create_bool
15. debugfs_create_blob

/*
 *  debugfs.h - a tiny little debug file system
 *
 *  Copyright (C) 2004 Greg Kroah-Hartman <greg@kroah.com>
 *  Copyright (C) 2004 IBM Inc.
 *
 *      This program is free software; you can redistribute it and/or
 *      modify it under the terms of the GNU General Public License version
 *      2 as published by the Free Software Foundation.
 *
 *  debugfs is for people to use instead of /proc or /sys.
 *  See Documentation/DocBook/kernel-api for more details.
 */

#ifndef _DEBUGFS_H_
#define _DEBUGFS_H_

#include <linux/fs.h>

#include <linux/types.h>

struct file_operations;

struct debugfs_blob_wrapper {
        void *data;
        unsigned long size;
};

extern struct dentry *arch_debugfs_dir;

#if defined(CONFIG_DEBUG_FS)

/* declared over in file.c */
extern const struct file_operations debugfs_file_operations;
extern const struct inode_operations debugfs_link_operations;

struct dentry *debugfs_create_file(const char *name, mode_t mode,
                                   struct dentry *parent, void *data,
                                   const struct file_operations *fops);

struct dentry *debugfs_create_dir(const char *name, struct dentry *parent);

struct dentry *debugfs_create_symlink(const char *name, struct dentry *parent,
                                      const char *dest);

void debugfs_remove(struct dentry *dentry);
void debugfs_remove_recursive(struct dentry *dentry);

struct dentry *debugfs_rename(struct dentry *old_dir, struct dentry *old_dentry,
                struct dentry *new_dir, const char *new_name);

struct dentry *debugfs_create_u8(const char *name, mode_t mode,
                                 struct dentry *parent, u8 *value);
struct dentry *debugfs_create_u16(const char *name, mode_t mode,
                                  struct dentry *parent, u16 *value);
struct dentry *debugfs_create_u32(const char *name, mode_t mode,
                                  struct dentry *parent, u32 *value);
struct dentry *debugfs_create_u64(const char *name, mode_t mode,
                                  struct dentry *parent, u64 *value);
struct dentry *debugfs_create_x8(const char *name, mode_t mode,
                                 struct dentry *parent, u8 *value);
struct dentry *debugfs_create_x16(const char *name, mode_t mode,
                                  struct dentry *parent, u16 *value);
struct dentry *debugfs_create_x32(const char *name, mode_t mode,
                                  struct dentry *parent, u32 *value);
struct dentry *debugfs_create_bool(const char *name, mode_t mode,
                                  struct dentry *parent, u32 *value);

struct dentry *debugfs_create_blob(const char *name, mode_t mode,
                                  struct dentry *parent,
                                  struct debugfs_blob_wrapper *blob);
#else

#include <linux/err.h>

/* 
 * We do not return NULL from these functions if CONFIG_DEBUG_FS is not enabled
 * so users have a chance to detect if there was a real error or not.  We don't
 * want to duplicate the design decision mistakes of procfs and devfs again.
 */

static inline struct dentry *debugfs_create_file(const char *name, mode_t mode,
                                        struct dentry *parent, void *data,
                                        const struct file_operations *fops)
{
        return ERR_PTR(-ENODEV);
}

static inline struct dentry *debugfs_create_dir(const char *name,
                                                struct dentry *parent)
{
        return ERR_PTR(-ENODEV);
}

static inline struct dentry *debugfs_create_symlink(const char *name,
                                                    struct dentry *parent,
                                                    const char *dest)
{
        return ERR_PTR(-ENODEV);
}

static inline void debugfs_remove(struct dentry *dentry)
{ }

static inline void debugfs_remove_recursive(struct dentry *dentry)
{ }

static inline struct dentry *debugfs_rename(struct dentry *old_dir, struct dentry *old_dentry,
                struct dentry *new_dir, char *new_name)
{
        return ERR_PTR(-ENODEV);
}

static inline struct dentry *debugfs_create_u8(const char *name, mode_t mode,
                                               struct dentry *parent,
                                               u8 *value)
{
        return ERR_PTR(-ENODEV);
}

static inline struct dentry *debugfs_create_u16(const char *name, mode_t mode,
                                                struct dentry *parent,
                                                u16 *value)
{
        return ERR_PTR(-ENODEV);
}

static inline struct dentry *debugfs_create_u32(const char *name, mode_t mode,
                                                struct dentry *parent,
                                                u32 *value)
{
        return ERR_PTR(-ENODEV);
}

static inline struct dentry *debugfs_create_u64(const char *name, mode_t mode,
                                                struct dentry *parent,
                                                u64 *value)
{
        return ERR_PTR(-ENODEV);
}

static inline struct dentry *debugfs_create_x8(const char *name, mode_t mode,
                                               struct dentry *parent,
                                               u8 *value)
{
        return ERR_PTR(-ENODEV);
}

static inline struct dentry *debugfs_create_x16(const char *name, mode_t mode,
                                                struct dentry *parent,
                                                u16 *value)
{
        return ERR_PTR(-ENODEV);
}

static inline struct dentry *debugfs_create_x32(const char *name, mode_t mode,
                                                struct dentry *parent,
                                                u32 *value)
{
        return ERR_PTR(-ENODEV);
}

static inline struct dentry *debugfs_create_bool(const char *name, mode_t mode,
                                                 struct dentry *parent,
                                                 u32 *value)
{
        return ERR_PTR(-ENODEV);
}

static inline struct dentry *debugfs_create_blob(const char *name, mode_t mode,
                                  struct dentry *parent,
                                  struct debugfs_blob_wrapper *blob)
{
        return ERR_PTR(-ENODEV);
}

#endif

#endif