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)
30
31/* declared over in file.c */
32extern const struct file_operations debugfs_file_operations;
33extern const struct inode_operations debugfs_link_operations;
34
35struct dentry *debugfs_create_file(const char *name, mode_t mode,
36 struct dentry *parent, void *data,
37 const struct file_operations *fops);
38
39struct dentry *debugfs_create_dir(const char *name, struct dentry *parent);
40
41struct dentry *debugfs_create_symlink(const char *name, struct dentry *parent,
42 const char *dest);
43
44void debugfs_remove(struct dentry *dentry);
45
46struct dentry *debugfs_rename(struct dentry *old_dir, struct dentry *old_dentry,
47 struct dentry *new_dir, const char *new_name);
48
49struct dentry *debugfs_create_u8(const char *name, mode_t mode,
50 struct dentry *parent, u8 *value);
51struct dentry *debugfs_create_u16(const char *name, mode_t mode,
52 struct dentry *parent, u16 *value);
53struct dentry *debugfs_create_u32(const char *name, mode_t mode,
54 struct dentry *parent, u32 *value);
55struct dentry *debugfs_create_u64(const char *name, mode_t mode,
56 struct dentry *parent, u64 *value);
57struct dentry *debugfs_create_x8(const char *name, mode_t mode,
58 struct dentry *parent, u8 *value);
59struct dentry *debugfs_create_x16(const char *name, mode_t mode,
60 struct dentry *parent, u16 *value);
61struct dentry *debugfs_create_x32(const char *name, mode_t mode,
62 struct dentry *parent, u32 *value);
63struct dentry *debugfs_create_bool(const char *name, mode_t mode,
64 struct dentry *parent, u32 *value);
65
66struct dentry *debugfs_create_blob(const char *name, mode_t mode,
67 struct dentry *parent,
68 struct debugfs_blob_wrapper *blob);
69#else
70
71#include <linux/err.h>
72
73/*
74 * We do not return NULL from these functions if CONFIG_DEBUG_FS is not enabled
75 * so users have a chance to detect if there was a real error or not. We don't
76 * want to duplicate the design decision mistakes of procfs and devfs again.
77 */
78
79static inline struct dentry *debugfs_create_file(const char *name, mode_t mode,
80 struct dentry *parent, void *data,
81 const struct file_operations *fops)
82{
83 return ERR_PTR(-ENODEV);
84}
85
86static inline struct dentry *debugfs_create_dir(const char *name,
87 struct dentry *parent)
88{
89 return ERR_PTR(-ENODEV);
90}
91
92static inline struct dentry *debugfs_create_symlink(const char *name,
93 struct dentry *parent,
94 const char *dest)
95{
96 return ERR_PTR(-ENODEV);
97}
98
99static inline void debugfs_remove(struct dentry *dentry)
100{ }
101
102static inline struct dentry *debugfs_rename(struct dentry *old_dir, struct dentry *old_dentry,
103 struct dentry *new_dir, char *new_name)
104{
105 return ERR_PTR(-ENODEV);
106}
107
108static inline struct dentry *debugfs_create_u8(const char *name, mode_t mode,
109 struct dentry *parent,
110 u8 *value)
111{
112 return ERR_PTR(-ENODEV);
113}
114
115static inline struct dentry *debugfs_create_u16(const char *name, mode_t mode,
116 struct dentry *parent,
117 u16 *value)
118{
119 return ERR_PTR(-ENODEV);
120}
121
122static inline struct dentry *debugfs_create_u32(const char *name, mode_t mode,
123 struct dentry *parent,
124 u32 *value)
125{
126 return ERR_PTR(-ENODEV);
127}
128
129static inline struct dentry *debugfs_create_u64(const char *name, mode_t mode,
130 struct dentry *parent,
131 u64 *value)
132{
133 return ERR_PTR(-ENODEV);
134}
135
136static inline struct dentry *debugfs_create_x8(const char *name, mode_t mode,
137 struct dentry *parent,
138 u8 *value)
139{
140 return ERR_PTR(-ENODEV);
141}
142
143static inline struct dentry *debugfs_create_x16(const char *name, mode_t mode,
144 struct dentry *parent,
145 u16 *value)
146{
147 return ERR_PTR(-ENODEV);
148}
149
150static inline struct dentry *debugfs_create_x32(const char *name, mode_t mode,
151 struct dentry *parent,
152 u32 *value)
153{
154 return ERR_PTR(-ENODEV);
155}
156
157static inline struct dentry *debugfs_create_bool(const char *name, mode_t mode,
158 struct dentry *parent,
159 u32 *value)
160{
161 return ERR_PTR(-ENODEV);
162}
163
164static inline struct dentry *debugfs_create_blob(const char *name, mode_t mode,
165 struct dentry *parent,
166 struct debugfs_blob_wrapper *blob)
167{
168 return ERR_PTR(-ENODEV);
169}
170
171#endif
172
173#endif