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1da177e4 LT |
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 | ||
a7a76cef RD |
20 | #include <linux/types.h> |
21 | ||
22 | struct file_operations; | |
23 | ||
dd308bc3 ME |
24 | struct debugfs_blob_wrapper { |
25 | void *data; | |
26 | unsigned long size; | |
27 | }; | |
28 | ||
1da177e4 LT |
29 | #if defined(CONFIG_DEBUG_FS) |
30 | struct dentry *debugfs_create_file(const char *name, mode_t mode, | |
31 | struct dentry *parent, void *data, | |
99ac48f5 | 32 | const struct file_operations *fops); |
1da177e4 LT |
33 | |
34 | struct dentry *debugfs_create_dir(const char *name, struct dentry *parent); | |
35 | ||
36 | void debugfs_remove(struct dentry *dentry); | |
37 | ||
38 | struct dentry *debugfs_create_u8(const char *name, mode_t mode, | |
39 | struct dentry *parent, u8 *value); | |
40 | struct dentry *debugfs_create_u16(const char *name, mode_t mode, | |
41 | struct dentry *parent, u16 *value); | |
42 | struct dentry *debugfs_create_u32(const char *name, mode_t mode, | |
43 | struct dentry *parent, u32 *value); | |
44 | struct dentry *debugfs_create_bool(const char *name, mode_t mode, | |
45 | struct dentry *parent, u32 *value); | |
46 | ||
dd308bc3 ME |
47 | struct dentry *debugfs_create_blob(const char *name, mode_t mode, |
48 | struct dentry *parent, | |
49 | struct debugfs_blob_wrapper *blob); | |
1da177e4 | 50 | #else |
a7a76cef RD |
51 | |
52 | #include <linux/err.h> | |
53 | ||
1da177e4 LT |
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 | ||
60 | static inline struct dentry *debugfs_create_file(const char *name, mode_t mode, | |
61 | struct dentry *parent, | |
62 | void *data, | |
63 | struct file_operations *fops) | |
64 | { | |
65 | return ERR_PTR(-ENODEV); | |
66 | } | |
67 | ||
68 | static inline struct dentry *debugfs_create_dir(const char *name, | |
69 | struct dentry *parent) | |
70 | { | |
71 | return ERR_PTR(-ENODEV); | |
72 | } | |
73 | ||
74 | static inline void debugfs_remove(struct dentry *dentry) | |
75 | { } | |
76 | ||
77 | static inline struct dentry *debugfs_create_u8(const char *name, mode_t mode, | |
78 | struct dentry *parent, | |
79 | u8 *value) | |
80 | { | |
81 | return ERR_PTR(-ENODEV); | |
82 | } | |
83 | ||
84 | static inline struct dentry *debugfs_create_u16(const char *name, mode_t mode, | |
85 | struct dentry *parent, | |
7b558637 | 86 | u16 *value) |
1da177e4 LT |
87 | { |
88 | return ERR_PTR(-ENODEV); | |
89 | } | |
90 | ||
91 | static inline struct dentry *debugfs_create_u32(const char *name, mode_t mode, | |
92 | struct dentry *parent, | |
7b558637 | 93 | u32 *value) |
1da177e4 LT |
94 | { |
95 | return ERR_PTR(-ENODEV); | |
96 | } | |
97 | ||
98 | static inline struct dentry *debugfs_create_bool(const char *name, mode_t mode, | |
99 | struct dentry *parent, | |
7b558637 | 100 | u32 *value) |
1da177e4 LT |
101 | { |
102 | return ERR_PTR(-ENODEV); | |
103 | } | |
104 | ||
dd308bc3 ME |
105 | static inline struct dentry *debugfs_create_blob(const char *name, mode_t mode, |
106 | struct dentry *parent, | |
107 | struct debugfs_blob_wrapper *blob) | |
108 | { | |
109 | return ERR_PTR(-ENODEV); | |
110 | } | |
111 | ||
1da177e4 LT |
112 | #endif |
113 | ||
114 | #endif |