Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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
29extern struct dentry *arch_debugfs_dir;
30
31#if defined(CONFIG_DEBUG_FS)
32
33/* declared over in file.c */
34extern const struct file_operations debugfs_file_operations;
35extern const struct inode_operations debugfs_link_operations;
36
37struct dentry *debugfs_create_file(const char *name, mode_t mode,
38 struct dentry *parent, void *data,
39 const struct file_operations *fops);
40
41struct dentry *debugfs_create_dir(const char *name, struct dentry *parent);
42
43struct dentry *debugfs_create_symlink(const char *name, struct dentry *parent,
44 const char *dest);
45
46void debugfs_remove(struct dentry *dentry);
47void debugfs_remove_recursive(struct dentry *dentry);
48
49struct dentry *debugfs_rename(struct dentry *old_dir, struct dentry *old_dentry,
50 struct dentry *new_dir, const char *new_name);
51
52struct dentry *debugfs_create_u8(const char *name, mode_t mode,
53 struct dentry *parent, u8 *value);
54struct dentry *debugfs_create_u16(const char *name, mode_t mode,
55 struct dentry *parent, u16 *value);
56struct dentry *debugfs_create_u32(const char *name, mode_t mode,
57 struct dentry *parent, u32 *value);
58struct dentry *debugfs_create_u64(const char *name, mode_t mode,
59 struct dentry *parent, u64 *value);
60struct dentry *debugfs_create_x8(const char *name, mode_t mode,
61 struct dentry *parent, u8 *value);
62struct dentry *debugfs_create_x16(const char *name, mode_t mode,
63 struct dentry *parent, u16 *value);
64struct dentry *debugfs_create_x32(const char *name, mode_t mode,
65 struct dentry *parent, u32 *value);
66struct dentry *debugfs_create_size_t(const char *name, mode_t mode,
67 struct dentry *parent, size_t *value);
68struct dentry *debugfs_create_bool(const char *name, mode_t mode,
69 struct dentry *parent, u32 *value);
70
71struct dentry *debugfs_create_blob(const char *name, mode_t mode,
72 struct dentry *parent,
73 struct debugfs_blob_wrapper *blob);
74#else
75
76#include <linux/err.h>
77
78/*
79 * We do not return NULL from these functions if CONFIG_DEBUG_FS is not enabled
80 * so users have a chance to detect if there was a real error or not. We don't
81 * want to duplicate the design decision mistakes of procfs and devfs again.
82 */
83
84static inline struct dentry *debugfs_create_file(const char *name, mode_t mode,
85 struct dentry *parent, void *data,
86 const struct file_operations *fops)
87{
88 return ERR_PTR(-ENODEV);
89}
90
91static inline struct dentry *debugfs_create_dir(const char *name,
92 struct dentry *parent)
93{
94 return ERR_PTR(-ENODEV);
95}
96
97static inline struct dentry *debugfs_create_symlink(const char *name,
98 struct dentry *parent,
99 const char *dest)
100{
101 return ERR_PTR(-ENODEV);
102}
103
104static inline void debugfs_remove(struct dentry *dentry)
105{ }
106
107static inline void debugfs_remove_recursive(struct dentry *dentry)
108{ }
109
110static inline struct dentry *debugfs_rename(struct dentry *old_dir, struct dentry *old_dentry,
111 struct dentry *new_dir, char *new_name)
112{
113 return ERR_PTR(-ENODEV);
114}
115
116static inline struct dentry *debugfs_create_u8(const char *name, mode_t mode,
117 struct dentry *parent,
118 u8 *value)
119{
120 return ERR_PTR(-ENODEV);
121}
122
123static inline struct dentry *debugfs_create_u16(const char *name, mode_t mode,
124 struct dentry *parent,
125 u16 *value)
126{
127 return ERR_PTR(-ENODEV);
128}
129
130static inline struct dentry *debugfs_create_u32(const char *name, mode_t mode,
131 struct dentry *parent,
132 u32 *value)
133{
134 return ERR_PTR(-ENODEV);
135}
136
137static inline struct dentry *debugfs_create_u64(const char *name, mode_t mode,
138 struct dentry *parent,
139 u64 *value)
140{
141 return ERR_PTR(-ENODEV);
142}
143
144static inline struct dentry *debugfs_create_x8(const char *name, mode_t mode,
145 struct dentry *parent,
146 u8 *value)
147{
148 return ERR_PTR(-ENODEV);
149}
150
151static inline struct dentry *debugfs_create_x16(const char *name, mode_t mode,
152 struct dentry *parent,
153 u16 *value)
154{
155 return ERR_PTR(-ENODEV);
156}
157
158static inline struct dentry *debugfs_create_x32(const char *name, mode_t mode,
159 struct dentry *parent,
160 u32 *value)
161{
162 return ERR_PTR(-ENODEV);
163}
164
165static inline struct dentry *debugfs_create_size_t(const char *name, mode_t mode,
166 struct dentry *parent,
167 size_t *value)
168{
169 return ERR_PTR(-ENODEV);
170}
171
172static inline struct dentry *debugfs_create_bool(const char *name, mode_t mode,
173 struct dentry *parent,
174 u32 *value)
175{
176 return ERR_PTR(-ENODEV);
177}
178
179static inline struct dentry *debugfs_create_blob(const char *name, mode_t mode,
180 struct dentry *parent,
181 struct debugfs_blob_wrapper *blob)
182{
183 return ERR_PTR(-ENODEV);
184}
185
186#endif
187
188#endif