text: /*
   *  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/filesystems for more details.
   */
  
  #ifndef _DEBUGFS_H_
  #define _DEBUGFS_H_
  
  #include <linux/fs.h>
  #include <linux/seq_file.h>
  
  #include <linux/types.h>
  
  struct file_operations;
  
  struct debugfs_blob_wrapper {
  	void *data;
  	unsigned long size;
  };
  
  struct debugfs_reg32 {
  	char *name;
  	unsigned long offset;
  };
  
  struct debugfs_regset32 {
  	struct debugfs_reg32 *regs;
  	int nregs;
  	void __iomem *base;
  };
  
  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, umode_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, umode_t mode,
  				 struct dentry *parent, u8 *value);
  struct dentry *debugfs_create_u16(const char *name, umode_t mode,
  				  struct dentry *parent, u16 *value);
  struct dentry *debugfs_create_u32(const char *name, umode_t mode,
  				  struct dentry *parent, u32 *value);
  struct dentry *debugfs_create_u64(const char *name, umode_t mode,
  				  struct dentry *parent, u64 *value);
  struct dentry *debugfs_create_x8(const char *name, umode_t mode,
  				 struct dentry *parent, u8 *value);
  struct dentry *debugfs_create_x16(const char *name, umode_t mode,
  				  struct dentry *parent, u16 *value);
  struct dentry *debugfs_create_x32(const char *name, umode_t mode,
  				  struct dentry *parent, u32 *value);
  struct dentry *debugfs_create_x64(const char *name, umode_t mode,
  				  struct dentry *parent, u64 *value);
  struct dentry *debugfs_create_size_t(const char *name, umode_t mode,
  				     struct dentry *parent, size_t *value);
  struct dentry *debugfs_create_bool(const char *name, umode_t mode,
  				  struct dentry *parent, u32 *value);
  
  struct dentry *debugfs_create_blob(const char *name, umode_t mode,
  				  struct dentry *parent,
  				  struct debugfs_blob_wrapper *blob);
  
  struct dentry *debugfs_create_regset32(const char *name, umode_t mode,
  				     struct dentry *parent,
  				     struct debugfs_regset32 *regset);
  
  int debugfs_print_regs32(struct seq_file *s, const struct debugfs_reg32 *regs,
  			 int nregs, void __iomem *base, char *prefix);
  
  struct dentry *debugfs_create_u32_array(const char *name, umode_t mode,
  					struct dentry *parent,
  					u32 *array, u32 elements);
  
  bool debugfs_initialized(void);
  
  #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, umode_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, umode_t mode,
  					       struct dentry *parent,
  					       u8 *value)
  {
  	return ERR_PTR(-ENODEV);
  }
  
  static inline struct dentry *debugfs_create_u16(const char *name, umode_t mode,
  						struct dentry *parent,
  						u16 *value)
  {
  	return ERR_PTR(-ENODEV);
  }
  
  static inline struct dentry *debugfs_create_u32(const char *name, umode_t mode,
  						struct dentry *parent,
  						u32 *value)
  {
  	return ERR_PTR(-ENODEV);
  }
  
  static inline struct dentry *debugfs_create_u64(const char *name, umode_t mode,
  						struct dentry *parent,
  						u64 *value)
  {
  	return ERR_PTR(-ENODEV);
  }
  
  static inline struct dentry *debugfs_create_x8(const char *name, umode_t mode,
  					       struct dentry *parent,
  					       u8 *value)
  {
  	return ERR_PTR(-ENODEV);
  }
  
  static inline struct dentry *debugfs_create_x16(const char *name, umode_t mode,
  						struct dentry *parent,
  						u16 *value)
  {
  	return ERR_PTR(-ENODEV);
  }
  
  static inline struct dentry *debugfs_create_x32(const char *name, umode_t mode,
  						struct dentry *parent,
  						u32 *value)
  {
  	return ERR_PTR(-ENODEV);
  }
  
  static inline struct dentry *debugfs_create_size_t(const char *name, umode_t mode,
  				     struct dentry *parent,
  				     size_t *value)
  {
  	return ERR_PTR(-ENODEV);
  }
  
  static inline struct dentry *debugfs_create_bool(const char *name, umode_t mode,
  						 struct dentry *parent,
  						 u32 *value)
  {
  	return ERR_PTR(-ENODEV);
  }
  
  static inline struct dentry *debugfs_create_blob(const char *name, umode_t mode,
  				  struct dentry *parent,
  				  struct debugfs_blob_wrapper *blob)
  {
  	return ERR_PTR(-ENODEV);
  }
  
  static inline struct dentry *debugfs_create_regset32(const char *name,
  				   umode_t mode, struct dentry *parent,
  				   struct debugfs_regset32 *regset)
  {
  	return ERR_PTR(-ENODEV);
  }
  
  static inline bool debugfs_initialized(void)
  {
  	return false;
  }
  
  static inline struct dentry *debugfs_create_u32_array(const char *name, umode_t mode,
  					struct dentry *parent,
  					u32 *array, u32 elements)
  {
  	return ERR_PTR(-ENODEV);
  }
  
  #endif
  
  #endif
  