Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * sysfs.h - definitions for the device driver filesystem | |
3 | * | |
4 | * Copyright (c) 2001,2002 Patrick Mochel | |
5 | * Copyright (c) 2004 Silicon Graphics, Inc. | |
6d66f5cd TH |
6 | * Copyright (c) 2007 SUSE Linux Products GmbH |
7 | * Copyright (c) 2007 Tejun Heo <teheo@suse.de> | |
1da177e4 LT |
8 | * |
9 | * Please see Documentation/filesystems/sysfs.txt for more information. | |
10 | */ | |
11 | ||
12 | #ifndef _SYSFS_H_ | |
13 | #define _SYSFS_H_ | |
14 | ||
4a7fb636 | 15 | #include <linux/compiler.h> |
5851fadc | 16 | #include <linux/errno.h> |
bf0acc33 | 17 | #include <linux/list.h> |
6992f533 | 18 | #include <linux/lockdep.h> |
8488a38f | 19 | #include <linux/kobject_ns.h> |
3493f69f | 20 | #include <linux/stat.h> |
60063497 | 21 | #include <linux/atomic.h> |
1da177e4 LT |
22 | |
23 | struct kobject; | |
24 | struct module; | |
6ab9cea1 | 25 | struct bin_attribute; |
3ff195b0 | 26 | enum kobj_ns_type; |
1da177e4 LT |
27 | |
28 | struct attribute { | |
59f69015 | 29 | const char *name; |
9104e427 | 30 | umode_t mode; |
6992f533 | 31 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
356c05d5 | 32 | bool ignore_lockdep:1; |
6992f533 EB |
33 | struct lock_class_key *key; |
34 | struct lock_class_key skey; | |
35 | #endif | |
1da177e4 LT |
36 | }; |
37 | ||
35960258 EB |
38 | /** |
39 | * sysfs_attr_init - initialize a dynamically allocated sysfs attribute | |
40 | * @attr: struct attribute to initialize | |
41 | * | |
42 | * Initialize a dynamically allocated struct attribute so we can | |
43 | * make lockdep happy. This is a new requirement for attributes | |
44 | * and initially this is only needed when lockdep is enabled. | |
45 | * Lockdep gives a nice error when your attribute is added to | |
46 | * sysfs if you don't have this. | |
47 | */ | |
6992f533 EB |
48 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
49 | #define sysfs_attr_init(attr) \ | |
50 | do { \ | |
51 | static struct lock_class_key __key; \ | |
52 | \ | |
53 | (attr)->key = &__key; \ | |
54 | } while(0) | |
55 | #else | |
56 | #define sysfs_attr_init(attr) do {} while(0) | |
57 | #endif | |
58 | ||
1da177e4 | 59 | struct attribute_group { |
59f69015 | 60 | const char *name; |
587a1f16 | 61 | umode_t (*is_visible)(struct kobject *, |
d4acd722 | 62 | struct attribute *, int); |
59f69015 | 63 | struct attribute **attrs; |
6ab9cea1 | 64 | struct bin_attribute **bin_attrs; |
1da177e4 LT |
65 | }; |
66 | ||
1da177e4 LT |
67 | /** |
68 | * Use these macros to make defining attributes easier. See include/linux/device.h | |
69 | * for examples.. | |
70 | */ | |
71 | ||
aa01aa3c OS |
72 | #define __ATTR(_name,_mode,_show,_store) { \ |
73 | .attr = {.name = __stringify(_name), .mode = _mode }, \ | |
74 | .show = _show, \ | |
75 | .store = _store, \ | |
1da177e4 LT |
76 | } |
77 | ||
aa01aa3c OS |
78 | #define __ATTR_RO(_name) { \ |
79 | .attr = { .name = __stringify(_name), .mode = S_IRUGO }, \ | |
80 | .show = _name##_show, \ | |
1da177e4 LT |
81 | } |
82 | ||
aa01aa3c OS |
83 | #define __ATTR_RW(_name) __ATTR(_name, (S_IWUSR | S_IRUGO), \ |
84 | _name##_show, _name##_store) | |
b9b32597 | 85 | |
1da177e4 | 86 | #define __ATTR_NULL { .attr = { .name = NULL } } |
356c05d5 AS |
87 | |
88 | #ifdef CONFIG_DEBUG_LOCK_ALLOC | |
89 | #define __ATTR_IGNORE_LOCKDEP(_name, _mode, _show, _store) { \ | |
90 | .attr = {.name = __stringify(_name), .mode = _mode, \ | |
91 | .ignore_lockdep = true }, \ | |
92 | .show = _show, \ | |
93 | .store = _store, \ | |
94 | } | |
95 | #else | |
96 | #define __ATTR_IGNORE_LOCKDEP __ATTR | |
97 | #endif | |
1da177e4 | 98 | |
3493f69f OS |
99 | #define __ATTRIBUTE_GROUPS(_name) \ |
100 | static const struct attribute_group *_name##_groups[] = { \ | |
101 | &_name##_group, \ | |
f2f37f58 GKH |
102 | NULL, \ |
103 | } | |
104 | ||
3493f69f OS |
105 | #define ATTRIBUTE_GROUPS(_name) \ |
106 | static const struct attribute_group _name##_group = { \ | |
107 | .attrs = _name##_attrs, \ | |
108 | }; \ | |
109 | __ATTRIBUTE_GROUPS(_name) | |
110 | ||
1da177e4 LT |
111 | #define attr_name(_attr) (_attr).attr.name |
112 | ||
2c3c8bea | 113 | struct file; |
1da177e4 LT |
114 | struct vm_area_struct; |
115 | ||
116 | struct bin_attribute { | |
117 | struct attribute attr; | |
118 | size_t size; | |
119 | void *private; | |
2c3c8bea | 120 | ssize_t (*read)(struct file *, struct kobject *, struct bin_attribute *, |
91a69029 | 121 | char *, loff_t, size_t); |
2c3c8bea | 122 | ssize_t (*write)(struct file *,struct kobject *, struct bin_attribute *, |
91a69029 | 123 | char *, loff_t, size_t); |
2c3c8bea | 124 | int (*mmap)(struct file *, struct kobject *, struct bin_attribute *attr, |
1da177e4 LT |
125 | struct vm_area_struct *vma); |
126 | }; | |
127 | ||
35960258 EB |
128 | /** |
129 | * sysfs_bin_attr_init - initialize a dynamically allocated bin_attribute | |
130 | * @attr: struct bin_attribute to initialize | |
131 | * | |
132 | * Initialize a dynamically allocated struct bin_attribute so we | |
133 | * can make lockdep happy. This is a new requirement for | |
134 | * attributes and initially this is only needed when lockdep is | |
135 | * enabled. Lockdep gives a nice error when your attribute is | |
136 | * added to sysfs if you don't have this. | |
137 | */ | |
62e877b8 | 138 | #define sysfs_bin_attr_init(bin_attr) sysfs_attr_init(&(bin_attr)->attr) |
6992f533 | 139 | |
3493f69f OS |
140 | /* macros to create static binary attributes easier */ |
141 | #define __BIN_ATTR(_name, _mode, _read, _write, _size) { \ | |
142 | .attr = { .name = __stringify(_name), .mode = _mode }, \ | |
143 | .read = _read, \ | |
144 | .write = _write, \ | |
145 | .size = _size, \ | |
146 | } | |
147 | ||
148 | #define __BIN_ATTR_RO(_name, _size) { \ | |
149 | .attr = { .name = __stringify(_name), .mode = S_IRUGO }, \ | |
150 | .read = _name##_read, \ | |
151 | .size = _size, \ | |
e4b63603 GKH |
152 | } |
153 | ||
3493f69f OS |
154 | #define __BIN_ATTR_RW(_name, _size) __BIN_ATTR(_name, \ |
155 | (S_IWUSR | S_IRUGO), _name##_read, \ | |
156 | _name##_write) | |
157 | ||
158 | #define __BIN_ATTR_NULL __ATTR_NULL | |
159 | ||
160 | #define BIN_ATTR(_name, _mode, _read, _write, _size) \ | |
161 | struct bin_attribute bin_attr_##_name = __BIN_ATTR(_name, _mode, _read, \ | |
162 | _write, _size) | |
163 | ||
164 | #define BIN_ATTR_RO(_name, _size) \ | |
165 | struct bin_attribute bin_attr_##_name = __BIN_ATTR_RO(_name, _size) | |
166 | ||
167 | #define BIN_ATTR_RW(_name, _size) \ | |
168 | struct bin_attribute bin_attr_##_name = __BIN_ATTR_RW(_name, _size) | |
169 | ||
1da177e4 LT |
170 | struct sysfs_ops { |
171 | ssize_t (*show)(struct kobject *, struct attribute *,char *); | |
172 | ssize_t (*store)(struct kobject *,struct attribute *,const char *, size_t); | |
487505c2 | 173 | const void *(*namespace)(struct kobject *, const struct attribute *); |
1da177e4 LT |
174 | }; |
175 | ||
f1282c84 NB |
176 | struct sysfs_dirent; |
177 | ||
1da177e4 LT |
178 | #ifdef CONFIG_SYSFS |
179 | ||
59f69015 TH |
180 | int sysfs_schedule_callback(struct kobject *kobj, void (*func)(void *), |
181 | void *data, struct module *owner); | |
1da177e4 | 182 | |
59f69015 TH |
183 | int __must_check sysfs_create_dir(struct kobject *kobj); |
184 | void sysfs_remove_dir(struct kobject *kobj); | |
185 | int __must_check sysfs_rename_dir(struct kobject *kobj, const char *new_name); | |
186 | int __must_check sysfs_move_dir(struct kobject *kobj, | |
187 | struct kobject *new_parent_kobj); | |
31e5abe9 | 188 | |
59f69015 TH |
189 | int __must_check sysfs_create_file(struct kobject *kobj, |
190 | const struct attribute *attr); | |
1c205ae1 AK |
191 | int __must_check sysfs_create_files(struct kobject *kobj, |
192 | const struct attribute **attr); | |
49c19400 | 193 | int __must_check sysfs_chmod_file(struct kobject *kobj, |
48176a97 | 194 | const struct attribute *attr, umode_t mode); |
59f69015 | 195 | void sysfs_remove_file(struct kobject *kobj, const struct attribute *attr); |
1c205ae1 | 196 | void sysfs_remove_files(struct kobject *kobj, const struct attribute **attr); |
1da177e4 | 197 | |
4a7fb636 | 198 | int __must_check sysfs_create_bin_file(struct kobject *kobj, |
66ecb92b PC |
199 | const struct bin_attribute *attr); |
200 | void sysfs_remove_bin_file(struct kobject *kobj, | |
201 | const struct bin_attribute *attr); | |
1da177e4 | 202 | |
59f69015 TH |
203 | int __must_check sysfs_create_link(struct kobject *kobj, struct kobject *target, |
204 | const char *name); | |
36ce6dad CH |
205 | int __must_check sysfs_create_link_nowarn(struct kobject *kobj, |
206 | struct kobject *target, | |
207 | const char *name); | |
59f69015 TH |
208 | void sysfs_remove_link(struct kobject *kobj, const char *name); |
209 | ||
7cb32942 EB |
210 | int sysfs_rename_link(struct kobject *kobj, struct kobject *target, |
211 | const char *old_name, const char *new_name); | |
212 | ||
746edb7a EB |
213 | void sysfs_delete_link(struct kobject *dir, struct kobject *targ, |
214 | const char *name); | |
215 | ||
59f69015 TH |
216 | int __must_check sysfs_create_group(struct kobject *kobj, |
217 | const struct attribute_group *grp); | |
0f423895 JB |
218 | int sysfs_update_group(struct kobject *kobj, |
219 | const struct attribute_group *grp); | |
59f69015 TH |
220 | void sysfs_remove_group(struct kobject *kobj, |
221 | const struct attribute_group *grp); | |
dfa87c82 | 222 | int sysfs_add_file_to_group(struct kobject *kobj, |
59f69015 | 223 | const struct attribute *attr, const char *group); |
dfa87c82 | 224 | void sysfs_remove_file_from_group(struct kobject *kobj, |
59f69015 | 225 | const struct attribute *attr, const char *group); |
69d44ffb AS |
226 | int sysfs_merge_group(struct kobject *kobj, |
227 | const struct attribute_group *grp); | |
228 | void sysfs_unmerge_group(struct kobject *kobj, | |
229 | const struct attribute_group *grp); | |
0bb8f3d6 RW |
230 | int sysfs_add_link_to_group(struct kobject *kobj, const char *group_name, |
231 | struct kobject *target, const char *link_name); | |
232 | void sysfs_remove_link_from_group(struct kobject *kobj, const char *group_name, | |
233 | const char *link_name); | |
dfa87c82 | 234 | |
8c0e3998 | 235 | void sysfs_notify(struct kobject *kobj, const char *dir, const char *attr); |
f1282c84 NB |
236 | void sysfs_notify_dirent(struct sysfs_dirent *sd); |
237 | struct sysfs_dirent *sysfs_get_dirent(struct sysfs_dirent *parent_sd, | |
3ff195b0 | 238 | const void *ns, |
f1282c84 NB |
239 | const unsigned char *name); |
240 | struct sysfs_dirent *sysfs_get(struct sysfs_dirent *sd); | |
241 | void sysfs_put(struct sysfs_dirent *sd); | |
3ff195b0 | 242 | |
f1282c84 | 243 | int __must_check sysfs_init(void); |
f20a9ead | 244 | |
1da177e4 LT |
245 | #else /* CONFIG_SYSFS */ |
246 | ||
d9a9cdfb | 247 | static inline int sysfs_schedule_callback(struct kobject *kobj, |
523ded71 | 248 | void (*func)(void *), void *data, struct module *owner) |
d9a9cdfb AS |
249 | { |
250 | return -ENOSYS; | |
251 | } | |
252 | ||
59f69015 | 253 | static inline int sysfs_create_dir(struct kobject *kobj) |
1da177e4 LT |
254 | { |
255 | return 0; | |
256 | } | |
257 | ||
59f69015 | 258 | static inline void sysfs_remove_dir(struct kobject *kobj) |
1da177e4 | 259 | { |
1da177e4 LT |
260 | } |
261 | ||
59f69015 | 262 | static inline int sysfs_rename_dir(struct kobject *kobj, const char *new_name) |
1da177e4 | 263 | { |
0b4a4fea | 264 | return 0; |
1da177e4 LT |
265 | } |
266 | ||
59f69015 TH |
267 | static inline int sysfs_move_dir(struct kobject *kobj, |
268 | struct kobject *new_parent_kobj) | |
8a82472f CH |
269 | { |
270 | return 0; | |
271 | } | |
272 | ||
59f69015 TH |
273 | static inline int sysfs_create_file(struct kobject *kobj, |
274 | const struct attribute *attr) | |
1da177e4 LT |
275 | { |
276 | return 0; | |
277 | } | |
278 | ||
1c205ae1 AK |
279 | static inline int sysfs_create_files(struct kobject *kobj, |
280 | const struct attribute **attr) | |
281 | { | |
282 | return 0; | |
283 | } | |
284 | ||
59f69015 | 285 | static inline int sysfs_chmod_file(struct kobject *kobj, |
48176a97 | 286 | const struct attribute *attr, umode_t mode) |
31e5abe9 KS |
287 | { |
288 | return 0; | |
289 | } | |
1da177e4 | 290 | |
59f69015 TH |
291 | static inline void sysfs_remove_file(struct kobject *kobj, |
292 | const struct attribute *attr) | |
1da177e4 | 293 | { |
1da177e4 LT |
294 | } |
295 | ||
1c205ae1 AK |
296 | static inline void sysfs_remove_files(struct kobject *kobj, |
297 | const struct attribute **attr) | |
298 | { | |
299 | } | |
300 | ||
59f69015 | 301 | static inline int sysfs_create_bin_file(struct kobject *kobj, |
66ecb92b | 302 | const struct bin_attribute *attr) |
1da177e4 LT |
303 | { |
304 | return 0; | |
305 | } | |
306 | ||
3612e06b | 307 | static inline void sysfs_remove_bin_file(struct kobject *kobj, |
66ecb92b | 308 | const struct bin_attribute *attr) |
1da177e4 | 309 | { |
1da177e4 LT |
310 | } |
311 | ||
59f69015 TH |
312 | static inline int sysfs_create_link(struct kobject *kobj, |
313 | struct kobject *target, const char *name) | |
1da177e4 LT |
314 | { |
315 | return 0; | |
316 | } | |
317 | ||
36ce6dad CH |
318 | static inline int sysfs_create_link_nowarn(struct kobject *kobj, |
319 | struct kobject *target, | |
320 | const char *name) | |
321 | { | |
322 | return 0; | |
323 | } | |
324 | ||
59f69015 | 325 | static inline void sysfs_remove_link(struct kobject *kobj, const char *name) |
1da177e4 | 326 | { |
1da177e4 LT |
327 | } |
328 | ||
7cb32942 EB |
329 | static inline int sysfs_rename_link(struct kobject *k, struct kobject *t, |
330 | const char *old_name, const char *new_name) | |
331 | { | |
332 | return 0; | |
333 | } | |
334 | ||
746edb7a EB |
335 | static inline void sysfs_delete_link(struct kobject *k, struct kobject *t, |
336 | const char *name) | |
337 | { | |
338 | } | |
339 | ||
59f69015 TH |
340 | static inline int sysfs_create_group(struct kobject *kobj, |
341 | const struct attribute_group *grp) | |
1da177e4 LT |
342 | { |
343 | return 0; | |
344 | } | |
345 | ||
1cbfb7a5 RD |
346 | static inline int sysfs_update_group(struct kobject *kobj, |
347 | const struct attribute_group *grp) | |
348 | { | |
349 | return 0; | |
350 | } | |
351 | ||
59f69015 TH |
352 | static inline void sysfs_remove_group(struct kobject *kobj, |
353 | const struct attribute_group *grp) | |
1da177e4 | 354 | { |
1da177e4 LT |
355 | } |
356 | ||
dfa87c82 AS |
357 | static inline int sysfs_add_file_to_group(struct kobject *kobj, |
358 | const struct attribute *attr, const char *group) | |
359 | { | |
360 | return 0; | |
361 | } | |
362 | ||
363 | static inline void sysfs_remove_file_from_group(struct kobject *kobj, | |
d701d8a3 | 364 | const struct attribute *attr, const char *group) |
dfa87c82 | 365 | { |
dfa87c82 AS |
366 | } |
367 | ||
69d44ffb AS |
368 | static inline int sysfs_merge_group(struct kobject *kobj, |
369 | const struct attribute_group *grp) | |
370 | { | |
371 | return 0; | |
372 | } | |
373 | ||
374 | static inline void sysfs_unmerge_group(struct kobject *kobj, | |
375 | const struct attribute_group *grp) | |
376 | { | |
377 | } | |
378 | ||
0bb8f3d6 RW |
379 | static inline int sysfs_add_link_to_group(struct kobject *kobj, |
380 | const char *group_name, struct kobject *target, | |
381 | const char *link_name) | |
382 | { | |
383 | return 0; | |
384 | } | |
385 | ||
386 | static inline void sysfs_remove_link_from_group(struct kobject *kobj, | |
387 | const char *group_name, const char *link_name) | |
388 | { | |
389 | } | |
390 | ||
8c0e3998 TP |
391 | static inline void sysfs_notify(struct kobject *kobj, const char *dir, |
392 | const char *attr) | |
4508a7a7 N |
393 | { |
394 | } | |
f1282c84 NB |
395 | static inline void sysfs_notify_dirent(struct sysfs_dirent *sd) |
396 | { | |
397 | } | |
398 | static inline | |
399 | struct sysfs_dirent *sysfs_get_dirent(struct sysfs_dirent *parent_sd, | |
3ff195b0 | 400 | const void *ns, |
f1282c84 NB |
401 | const unsigned char *name) |
402 | { | |
403 | return NULL; | |
404 | } | |
405 | static inline struct sysfs_dirent *sysfs_get(struct sysfs_dirent *sd) | |
406 | { | |
407 | return NULL; | |
408 | } | |
409 | static inline void sysfs_put(struct sysfs_dirent *sd) | |
410 | { | |
411 | } | |
4508a7a7 | 412 | |
f20a9ead AM |
413 | static inline int __must_check sysfs_init(void) |
414 | { | |
415 | return 0; | |
416 | } | |
417 | ||
1da177e4 LT |
418 | #endif /* CONFIG_SYSFS */ |
419 | ||
420 | #endif /* _SYSFS_H_ */ |