/*

 *  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