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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 | ||
20 | #if defined(CONFIG_DEBUG_FS) | |
21 | struct dentry *debugfs_create_file(const char *name, mode_t mode, | |
22 | struct dentry *parent, void *data, | |
23 | struct file_operations *fops); | |
24 | ||
25 | struct dentry *debugfs_create_dir(const char *name, struct dentry *parent); | |
26 | ||
27 | void debugfs_remove(struct dentry *dentry); | |
28 | ||
29 | struct dentry *debugfs_create_u8(const char *name, mode_t mode, | |
30 | struct dentry *parent, u8 *value); | |
31 | struct dentry *debugfs_create_u16(const char *name, mode_t mode, | |
32 | struct dentry *parent, u16 *value); | |
33 | struct dentry *debugfs_create_u32(const char *name, mode_t mode, | |
34 | struct dentry *parent, u32 *value); | |
35 | struct dentry *debugfs_create_bool(const char *name, mode_t mode, | |
36 | struct dentry *parent, u32 *value); | |
37 | ||
38 | #else | |
39 | /* | |
40 | * We do not return NULL from these functions if CONFIG_DEBUG_FS is not enabled | |
41 | * so users have a chance to detect if there was a real error or not. We don't | |
42 | * want to duplicate the design decision mistakes of procfs and devfs again. | |
43 | */ | |
44 | ||
45 | static inline struct dentry *debugfs_create_file(const char *name, mode_t mode, | |
46 | struct dentry *parent, | |
47 | void *data, | |
48 | struct file_operations *fops) | |
49 | { | |
50 | return ERR_PTR(-ENODEV); | |
51 | } | |
52 | ||
53 | static inline struct dentry *debugfs_create_dir(const char *name, | |
54 | struct dentry *parent) | |
55 | { | |
56 | return ERR_PTR(-ENODEV); | |
57 | } | |
58 | ||
59 | static inline void debugfs_remove(struct dentry *dentry) | |
60 | { } | |
61 | ||
62 | static inline struct dentry *debugfs_create_u8(const char *name, mode_t mode, | |
63 | struct dentry *parent, | |
64 | u8 *value) | |
65 | { | |
66 | return ERR_PTR(-ENODEV); | |
67 | } | |
68 | ||
69 | static inline struct dentry *debugfs_create_u16(const char *name, mode_t mode, | |
70 | struct dentry *parent, | |
71 | u8 *value) | |
72 | { | |
73 | return ERR_PTR(-ENODEV); | |
74 | } | |
75 | ||
76 | static inline struct dentry *debugfs_create_u32(const char *name, mode_t mode, | |
77 | struct dentry *parent, | |
78 | u8 *value) | |
79 | { | |
80 | return ERR_PTR(-ENODEV); | |
81 | } | |
82 | ||
83 | static inline struct dentry *debugfs_create_bool(const char *name, mode_t mode, | |
84 | struct dentry *parent, | |
85 | u8 *value) | |
86 | { | |
87 | return ERR_PTR(-ENODEV); | |
88 | } | |
89 | ||
90 | #endif | |
91 | ||
92 | #endif |