/* * 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; #if defined(CONFIG_DEBUG_FS) struct dentry *debugfs_create_file(const char *name, mode_t mode, struct dentry *parent, void *data, struct file_operations *fops); struct dentry *debugfs_create_dir(const char *name, struct dentry *parent); void debugfs_remove(struct dentry *dentry); 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_bool(const char *name, mode_t mode, struct dentry *parent, u32 *value); #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, 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 void debugfs_remove(struct dentry *dentry) { } 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_bool(const char *name, mode_t mode, struct dentry *parent, u32 *value) { return ERR_PTR(-ENODEV); } #endif #endif