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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)
21struct dentry *debugfs_create_file(const char *name, mode_t mode,
22 struct dentry *parent, void *data,
23 struct file_operations *fops);
24
25struct dentry *debugfs_create_dir(const char *name, struct dentry *parent);
26
27void debugfs_remove(struct dentry *dentry);
28
29struct dentry *debugfs_create_u8(const char *name, mode_t mode,
30 struct dentry *parent, u8 *value);
31struct dentry *debugfs_create_u16(const char *name, mode_t mode,
32 struct dentry *parent, u16 *value);
33struct dentry *debugfs_create_u32(const char *name, mode_t mode,
34 struct dentry *parent, u32 *value);
35struct 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
45static 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
53static inline struct dentry *debugfs_create_dir(const char *name,
54 struct dentry *parent)
55{
56 return ERR_PTR(-ENODEV);
57}
58
59static inline void debugfs_remove(struct dentry *dentry)
60{ }
61
62static 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
69static 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
76static 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
83static 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