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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/filesystems for more details. | |
13 | */ | |
14 | ||
15 | #ifndef _DEBUGFS_H_ | |
16 | #define _DEBUGFS_H_ | |
17 | ||
18 | #include <linux/fs.h> | |
19 | #include <linux/seq_file.h> | |
20 | ||
21 | #include <linux/types.h> | |
22 | ||
23 | struct file_operations; | |
24 | ||
25 | struct debugfs_blob_wrapper { | |
26 | void *data; | |
27 | unsigned long size; | |
28 | }; | |
29 | ||
30 | struct debugfs_reg32 { | |
31 | char *name; | |
32 | unsigned long offset; | |
33 | }; | |
34 | ||
35 | struct debugfs_regset32 { | |
36 | const struct debugfs_reg32 *regs; | |
37 | int nregs; | |
38 | void __iomem *base; | |
39 | }; | |
40 | ||
41 | extern struct dentry *arch_debugfs_dir; | |
42 | ||
43 | #if defined(CONFIG_DEBUG_FS) | |
44 | ||
45 | /* declared over in file.c */ | |
46 | extern const struct file_operations debugfs_file_operations; | |
47 | extern const struct inode_operations debugfs_link_operations; | |
48 | ||
49 | struct dentry *debugfs_create_file(const char *name, umode_t mode, | |
50 | struct dentry *parent, void *data, | |
51 | const struct file_operations *fops); | |
52 | ||
53 | struct dentry *debugfs_create_dir(const char *name, struct dentry *parent); | |
54 | ||
55 | struct dentry *debugfs_create_symlink(const char *name, struct dentry *parent, | |
56 | const char *dest); | |
57 | ||
58 | void debugfs_remove(struct dentry *dentry); | |
59 | void debugfs_remove_recursive(struct dentry *dentry); | |
60 | ||
61 | struct dentry *debugfs_rename(struct dentry *old_dir, struct dentry *old_dentry, | |
62 | struct dentry *new_dir, const char *new_name); | |
63 | ||
64 | struct dentry *debugfs_create_u8(const char *name, umode_t mode, | |
65 | struct dentry *parent, u8 *value); | |
66 | struct dentry *debugfs_create_u16(const char *name, umode_t mode, | |
67 | struct dentry *parent, u16 *value); | |
68 | struct dentry *debugfs_create_u32(const char *name, umode_t mode, | |
69 | struct dentry *parent, u32 *value); | |
70 | struct dentry *debugfs_create_u64(const char *name, umode_t mode, | |
71 | struct dentry *parent, u64 *value); | |
72 | struct dentry *debugfs_create_x8(const char *name, umode_t mode, | |
73 | struct dentry *parent, u8 *value); | |
74 | struct dentry *debugfs_create_x16(const char *name, umode_t mode, | |
75 | struct dentry *parent, u16 *value); | |
76 | struct dentry *debugfs_create_x32(const char *name, umode_t mode, | |
77 | struct dentry *parent, u32 *value); | |
78 | struct dentry *debugfs_create_x64(const char *name, umode_t mode, | |
79 | struct dentry *parent, u64 *value); | |
80 | struct dentry *debugfs_create_size_t(const char *name, umode_t mode, | |
81 | struct dentry *parent, size_t *value); | |
82 | struct dentry *debugfs_create_atomic_t(const char *name, umode_t mode, | |
83 | struct dentry *parent, atomic_t *value); | |
84 | struct dentry *debugfs_create_bool(const char *name, umode_t mode, | |
85 | struct dentry *parent, u32 *value); | |
86 | ||
87 | struct dentry *debugfs_create_blob(const char *name, umode_t mode, | |
88 | struct dentry *parent, | |
89 | struct debugfs_blob_wrapper *blob); | |
90 | ||
91 | struct dentry *debugfs_create_regset32(const char *name, umode_t mode, | |
92 | struct dentry *parent, | |
93 | struct debugfs_regset32 *regset); | |
94 | ||
95 | int debugfs_print_regs32(struct seq_file *s, const struct debugfs_reg32 *regs, | |
96 | int nregs, void __iomem *base, char *prefix); | |
97 | ||
98 | struct dentry *debugfs_create_u32_array(const char *name, umode_t mode, | |
99 | struct dentry *parent, | |
100 | u32 *array, u32 elements); | |
101 | ||
102 | bool debugfs_initialized(void); | |
103 | ||
104 | #else | |
105 | ||
106 | #include <linux/err.h> | |
107 | ||
108 | /* | |
109 | * We do not return NULL from these functions if CONFIG_DEBUG_FS is not enabled | |
110 | * so users have a chance to detect if there was a real error or not. We don't | |
111 | * want to duplicate the design decision mistakes of procfs and devfs again. | |
112 | */ | |
113 | ||
114 | static inline struct dentry *debugfs_create_file(const char *name, umode_t mode, | |
115 | struct dentry *parent, void *data, | |
116 | const struct file_operations *fops) | |
117 | { | |
118 | return ERR_PTR(-ENODEV); | |
119 | } | |
120 | ||
121 | static inline struct dentry *debugfs_create_dir(const char *name, | |
122 | struct dentry *parent) | |
123 | { | |
124 | return ERR_PTR(-ENODEV); | |
125 | } | |
126 | ||
127 | static inline struct dentry *debugfs_create_symlink(const char *name, | |
128 | struct dentry *parent, | |
129 | const char *dest) | |
130 | { | |
131 | return ERR_PTR(-ENODEV); | |
132 | } | |
133 | ||
134 | static inline void debugfs_remove(struct dentry *dentry) | |
135 | { } | |
136 | ||
137 | static inline void debugfs_remove_recursive(struct dentry *dentry) | |
138 | { } | |
139 | ||
140 | static inline struct dentry *debugfs_rename(struct dentry *old_dir, struct dentry *old_dentry, | |
141 | struct dentry *new_dir, char *new_name) | |
142 | { | |
143 | return ERR_PTR(-ENODEV); | |
144 | } | |
145 | ||
146 | static inline struct dentry *debugfs_create_u8(const char *name, umode_t mode, | |
147 | struct dentry *parent, | |
148 | u8 *value) | |
149 | { | |
150 | return ERR_PTR(-ENODEV); | |
151 | } | |
152 | ||
153 | static inline struct dentry *debugfs_create_u16(const char *name, umode_t mode, | |
154 | struct dentry *parent, | |
155 | u16 *value) | |
156 | { | |
157 | return ERR_PTR(-ENODEV); | |
158 | } | |
159 | ||
160 | static inline struct dentry *debugfs_create_u32(const char *name, umode_t mode, | |
161 | struct dentry *parent, | |
162 | u32 *value) | |
163 | { | |
164 | return ERR_PTR(-ENODEV); | |
165 | } | |
166 | ||
167 | static inline struct dentry *debugfs_create_u64(const char *name, umode_t mode, | |
168 | struct dentry *parent, | |
169 | u64 *value) | |
170 | { | |
171 | return ERR_PTR(-ENODEV); | |
172 | } | |
173 | ||
174 | static inline struct dentry *debugfs_create_x8(const char *name, umode_t mode, | |
175 | struct dentry *parent, | |
176 | u8 *value) | |
177 | { | |
178 | return ERR_PTR(-ENODEV); | |
179 | } | |
180 | ||
181 | static inline struct dentry *debugfs_create_x16(const char *name, umode_t mode, | |
182 | struct dentry *parent, | |
183 | u16 *value) | |
184 | { | |
185 | return ERR_PTR(-ENODEV); | |
186 | } | |
187 | ||
188 | static inline struct dentry *debugfs_create_x32(const char *name, umode_t mode, | |
189 | struct dentry *parent, | |
190 | u32 *value) | |
191 | { | |
192 | return ERR_PTR(-ENODEV); | |
193 | } | |
194 | ||
195 | static inline struct dentry *debugfs_create_x64(const char *name, umode_t mode, | |
196 | struct dentry *parent, | |
197 | u64 *value) | |
198 | { | |
199 | return ERR_PTR(-ENODEV); | |
200 | } | |
201 | ||
202 | static inline struct dentry *debugfs_create_size_t(const char *name, umode_t mode, | |
203 | struct dentry *parent, | |
204 | size_t *value) | |
205 | { | |
206 | return ERR_PTR(-ENODEV); | |
207 | } | |
208 | ||
209 | static inline struct dentry *debugfs_create_atomic_t(const char *name, umode_t mode, | |
210 | struct dentry *parent, atomic_t *value) | |
211 | { | |
212 | return ERR_PTR(-ENODEV); | |
213 | } | |
214 | ||
215 | static inline struct dentry *debugfs_create_bool(const char *name, umode_t mode, | |
216 | struct dentry *parent, | |
217 | u32 *value) | |
218 | { | |
219 | return ERR_PTR(-ENODEV); | |
220 | } | |
221 | ||
222 | static inline struct dentry *debugfs_create_blob(const char *name, umode_t mode, | |
223 | struct dentry *parent, | |
224 | struct debugfs_blob_wrapper *blob) | |
225 | { | |
226 | return ERR_PTR(-ENODEV); | |
227 | } | |
228 | ||
229 | static inline struct dentry *debugfs_create_regset32(const char *name, | |
230 | umode_t mode, struct dentry *parent, | |
231 | struct debugfs_regset32 *regset) | |
232 | { | |
233 | return ERR_PTR(-ENODEV); | |
234 | } | |
235 | ||
236 | static inline int debugfs_print_regs32(struct seq_file *s, const struct debugfs_reg32 *regs, | |
237 | int nregs, void __iomem *base, char *prefix) | |
238 | { | |
239 | return 0; | |
240 | } | |
241 | ||
242 | static inline bool debugfs_initialized(void) | |
243 | { | |
244 | return false; | |
245 | } | |
246 | ||
247 | static inline struct dentry *debugfs_create_u32_array(const char *name, umode_t mode, | |
248 | struct dentry *parent, | |
249 | u32 *array, u32 elements) | |
250 | { | |
251 | return ERR_PTR(-ENODEV); | |
252 | } | |
253 | ||
254 | #endif | |
255 | ||
256 | #endif |