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
36void debugfs_remove(struct dentry *dentry);
37
38struct dentry *debugfs_create_u8(const char *name, mode_t mode,
39 struct dentry *parent, u8 *value);
40struct dentry *debugfs_create_u16(const char *name, mode_t mode,
41 struct dentry *parent, u16 *value);
42struct dentry *debugfs_create_u32(const char *name, mode_t mode,
43 struct dentry *parent, u32 *value);
44struct dentry *debugfs_create_bool(const char *name, mode_t mode,
45 struct dentry *parent, u32 *value);
46
47struct dentry *debugfs_create_blob(const char *name, mode_t mode,
48 struct dentry *parent,
49 struct debugfs_blob_wrapper *blob);
50#else
51
52#include <linux/err.h>
53
54/*
55 * We do not return NULL from these functions if CONFIG_DEBUG_FS is not enabled
56 * so users have a chance to detect if there was a real error or not. We don't
57 * want to duplicate the design decision mistakes of procfs and devfs again.
58 */
59
60static inline struct dentry *debugfs_create_file(const char *name, mode_t mode,
61 struct dentry *parent, void *data,
62 const struct file_operations *fops)
63{
64 return ERR_PTR(-ENODEV);
65}
66
67static inline struct dentry *debugfs_create_dir(const char *name,
68 struct dentry *parent)
69{
70 return ERR_PTR(-ENODEV);
71}
72
73static inline void debugfs_remove(struct dentry *dentry)
74{ }
75
76static inline struct dentry *debugfs_create_u8(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_u16(const char *name, mode_t mode,
84 struct dentry *parent,
85 u16 *value)
86{
87 return ERR_PTR(-ENODEV);
88}
89
90static inline struct dentry *debugfs_create_u32(const char *name, mode_t mode,
91 struct dentry *parent,
92 u32 *value)
93{
94 return ERR_PTR(-ENODEV);
95}
96
97static inline struct dentry *debugfs_create_bool(const char *name, mode_t mode,
98 struct dentry *parent,
99 u32 *value)
100{
101 return ERR_PTR(-ENODEV);
102}
103
104static inline struct dentry *debugfs_create_blob(const char *name, mode_t mode,
105 struct dentry *parent,
106 struct debugfs_blob_wrapper *blob)
107{
108 return ERR_PTR(-ENODEV);
109}
110
111#endif
112
113#endif