projects/linux·blob 853da002 · refs

132 lines · 3.5 KiB

1/*
2 * debugfs.h - a tiny little debug file system
3 *
4 * Copyright (C) 2004 Greg Kroah-Hartman <[email protected]>
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_u64(const char *name, mode_t mode,
48 struct dentry *parent, u64 *value);
49struct dentry *debugfs_create_bool(const char *name, mode_t mode,
50 struct dentry *parent, u32 *value);
51
52struct dentry *debugfs_create_blob(const char *name, mode_t mode,
53 struct dentry *parent,
54 struct debugfs_blob_wrapper *blob);
55#else
56
57#include <linux/err.h>
58
59/*
60 * We do not return NULL from these functions if CONFIG_DEBUG_FS is not enabled
61 * so users have a chance to detect if there was a real error or not. We don't
62 * want to duplicate the design decision mistakes of procfs and devfs again.
63 */
64
65static inline struct dentry *debugfs_create_file(const char *name, mode_t mode,
66 struct dentry *parent, void *data,
67 const struct file_operations *fops)
68{
69 return ERR_PTR(-ENODEV);
70}
71
72static inline struct dentry *debugfs_create_dir(const char *name,
73 struct dentry *parent)
74{
75 return ERR_PTR(-ENODEV);
76}
77
78static inline struct dentry *debugfs_create_symlink(const char *name,
79 struct dentry *parent,
80 const char *dest)
81{
82 return ERR_PTR(-ENODEV);
83}
84
85static inline void debugfs_remove(struct dentry *dentry)
86{ }
87
88static inline struct dentry *debugfs_create_u8(const char *name, mode_t mode,
89 struct dentry *parent,
90 u8 *value)
91{
92 return ERR_PTR(-ENODEV);
93}
94
95static inline struct dentry *debugfs_create_u16(const char *name, mode_t mode,
96 struct dentry *parent,
97 u16 *value)
98{
99 return ERR_PTR(-ENODEV);
100}
101
102static inline struct dentry *debugfs_create_u32(const char *name, mode_t mode,
103 struct dentry *parent,
104 u32 *value)
105{
106 return ERR_PTR(-ENODEV);
107}
108
109static inline struct dentry *debugfs_create_u64(const char *name, mode_t mode,
110 struct dentry *parent,
111 u64 *value)
112{
113 return ERR_PTR(-ENODEV);
114}
115
116static inline struct dentry *debugfs_create_bool(const char *name, mode_t mode,
117 struct dentry *parent,
118 u32 *value)
119{
120 return ERR_PTR(-ENODEV);
121}
122
123static inline struct dentry *debugfs_create_blob(const char *name, mode_t mode,
124 struct dentry *parent,
125 struct debugfs_blob_wrapper *blob)
126{
127 return ERR_PTR(-ENODEV);
128}
129
130#endif
131
132#endif