| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * debugfs.h - a tiny little debug file system |
| 3 | * |
| 4 | * Copyright (C) 2004 Greg Kroah-Hartman <greg@kroah.com> |
| 5 | * Copyright (C) 2004 IBM Inc. |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or |
| 8 | * modify it under the terms of the GNU General Public License version |
| 9 | * 2 as published by the Free Software Foundation. |
| 10 | * |
| 11 | * debugfs is for people to use instead of /proc or /sys. |
| 12 | * See Documentation/DocBook/kernel-api for more details. |
| 13 | */ |
| 14 | |
| 15 | #ifndef _DEBUGFS_H_ |
| 16 | #define _DEBUGFS_H_ |
| 17 | |
| 18 | #include <linux/fs.h> |
| 19 | |
| 20 | #if defined(CONFIG_DEBUG_FS) |
| 21 | struct dentry *debugfs_create_file(const char *name, mode_t mode, |
| 22 | struct dentry *parent, void *data, |
| 23 | struct file_operations *fops); |
| 24 | |
| 25 | struct dentry *debugfs_create_dir(const char *name, struct dentry *parent); |
| 26 | |
| 27 | void debugfs_remove(struct dentry *dentry); |
| 28 | |
| 29 | struct dentry *debugfs_create_u8(const char *name, mode_t mode, |
| 30 | struct dentry *parent, u8 *value); |
| 31 | struct dentry *debugfs_create_u16(const char *name, mode_t mode, |
| 32 | struct dentry *parent, u16 *value); |
| 33 | struct dentry *debugfs_create_u32(const char *name, mode_t mode, |
| 34 | struct dentry *parent, u32 *value); |
| 35 | struct dentry *debugfs_create_bool(const char *name, mode_t mode, |
| 36 | struct dentry *parent, u32 *value); |
| 37 | |
| 38 | #else |
| 39 | /* |
| 40 | * We do not return NULL from these functions if CONFIG_DEBUG_FS is not enabled |
| 41 | * so users have a chance to detect if there was a real error or not. We don't |
| 42 | * want to duplicate the design decision mistakes of procfs and devfs again. |
| 43 | */ |
| 44 | |
| 45 | static inline struct dentry *debugfs_create_file(const char *name, mode_t mode, |
| 46 | struct dentry *parent, |
| 47 | void *data, |
| 48 | struct file_operations *fops) |
| 49 | { |
| 50 | return ERR_PTR(-ENODEV); |
| 51 | } |
| 52 | |
| 53 | static inline struct dentry *debugfs_create_dir(const char *name, |
| 54 | struct dentry *parent) |
| 55 | { |
| 56 | return ERR_PTR(-ENODEV); |
| 57 | } |
| 58 | |
| 59 | static inline void debugfs_remove(struct dentry *dentry) |
| 60 | { } |
| 61 | |
| 62 | static inline struct dentry *debugfs_create_u8(const char *name, mode_t mode, |
| 63 | struct dentry *parent, |
| 64 | u8 *value) |
| 65 | { |
| 66 | return ERR_PTR(-ENODEV); |
| 67 | } |
| 68 | |
| 69 | static inline struct dentry *debugfs_create_u16(const char *name, mode_t mode, |
| 70 | struct dentry *parent, |
| 71 | u8 *value) |
| 72 | { |
| 73 | return ERR_PTR(-ENODEV); |
| 74 | } |
| 75 | |
| 76 | static inline struct dentry *debugfs_create_u32(const char *name, mode_t mode, |
| 77 | struct dentry *parent, |
| 78 | u8 *value) |
| 79 | { |
| 80 | return ERR_PTR(-ENODEV); |
| 81 | } |
| 82 | |
| 83 | static inline struct dentry *debugfs_create_bool(const char *name, mode_t mode, |
| 84 | struct dentry *parent, |
| 85 | u8 *value) |
| 86 | { |
| 87 | return ERR_PTR(-ENODEV); |
| 88 | } |
| 89 | |
| 90 | #endif |
| 91 | |
| 92 | #endif |