Linux kernel mirror (for testing)
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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#include <linux/types.h>
21
22struct file_operations;
23
24struct debugfs_blob_wrapper {
25 void *data;
26 unsigned long size;
27};
28
29#if defined(CONFIG_DEBUG_FS)
30struct dentry *debugfs_create_file(const char *name, mode_t mode,
31 struct dentry *parent, void *data,
32 const struct file_operations *fops);
33
34struct dentry *debugfs_create_dir(const char *name, struct dentry *parent);
35
36struct dentry *debugfs_create_symlink(const char *name, struct dentry *parent,
37 const char *dest);
38
39void debugfs_remove(struct dentry *dentry);
40
41struct dentry *debugfs_create_u8(const char *name, mode_t mode,
42 struct dentry *parent, u8 *value);
43struct dentry *debugfs_create_u16(const char *name, mode_t mode,
44 struct dentry *parent, u16 *value);
45struct dentry *debugfs_create_u32(const char *name, mode_t mode,
46 struct dentry *parent, u32 *value);
47struct dentry *debugfs_create_bool(const char *name, mode_t mode,
48 struct dentry *parent, u32 *value);
49
50struct dentry *debugfs_create_blob(const char *name, mode_t mode,
51 struct dentry *parent,
52 struct debugfs_blob_wrapper *blob);
53#else
54
55#include <linux/err.h>
56
57/*
58 * We do not return NULL from these functions if CONFIG_DEBUG_FS is not enabled
59 * so users have a chance to detect if there was a real error or not. We don't
60 * want to duplicate the design decision mistakes of procfs and devfs again.
61 */
62
63static inline struct dentry *debugfs_create_file(const char *name, mode_t mode,
64 struct dentry *parent, void *data,
65 const struct file_operations *fops)
66{
67 return ERR_PTR(-ENODEV);
68}
69
70static inline struct dentry *debugfs_create_dir(const char *name,
71 struct dentry *parent)
72{
73 return ERR_PTR(-ENODEV);
74}
75
76static inline struct dentry *debugfs_create_symlink(const char *name,
77 struct dentry *parent,
78 const char *dest)
79{
80 return ERR_PTR(-ENODEV);
81}
82
83static inline void debugfs_remove(struct dentry *dentry)
84{ }
85
86static inline struct dentry *debugfs_create_u8(const char *name, mode_t mode,
87 struct dentry *parent,
88 u8 *value)
89{
90 return ERR_PTR(-ENODEV);
91}
92
93static inline struct dentry *debugfs_create_u16(const char *name, mode_t mode,
94 struct dentry *parent,
95 u16 *value)
96{
97 return ERR_PTR(-ENODEV);
98}
99
100static inline struct dentry *debugfs_create_u32(const char *name, mode_t mode,
101 struct dentry *parent,
102 u32 *value)
103{
104 return ERR_PTR(-ENODEV);
105}
106
107static inline struct dentry *debugfs_create_bool(const char *name, mode_t mode,
108 struct dentry *parent,
109 u32 *value)
110{
111 return ERR_PTR(-ENODEV);
112}
113
114static inline struct dentry *debugfs_create_blob(const char *name, mode_t mode,
115 struct dentry *parent,
116 struct debugfs_blob_wrapper *blob)
117{
118 return ERR_PTR(-ENODEV);
119}
120
121#endif
122
123#endif