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12#ifndef _SYSFS_H_
13#define _SYSFS_H_
14
15#include <linux/compiler.h>
16#include <linux/errno.h>
17#include <linux/list.h>
18#include <linux/lockdep.h>
19#include <linux/kobject_ns.h>
20#include <asm/atomic.h>
21
22struct kobject;
23struct module;
24enum kobj_ns_type;
25
26struct attribute {
27 const char *name;
28 mode_t mode;
29#ifdef CONFIG_DEBUG_LOCK_ALLOC
30 struct lock_class_key *key;
31 struct lock_class_key skey;
32#endif
33};
34
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41
42
43
44
45#ifdef CONFIG_DEBUG_LOCK_ALLOC
46#define sysfs_attr_init(attr) \
47do { \
48 static struct lock_class_key __key; \
49 \
50 (attr)->key = &__key; \
51} while(0)
52#else
53#define sysfs_attr_init(attr) do {} while(0)
54#endif
55
56struct attribute_group {
57 const char *name;
58 mode_t (*is_visible)(struct kobject *,
59 struct attribute *, int);
60 struct attribute **attrs;
61};
62
63
64
65
66
67
68
69
70#define __ATTR(_name,_mode,_show,_store) { \
71 .attr = {.name = __stringify(_name), .mode = _mode }, \
72 .show = _show, \
73 .store = _store, \
74}
75
76#define __ATTR_RO(_name) { \
77 .attr = { .name = __stringify(_name), .mode = 0444 }, \
78 .show = _name##_show, \
79}
80
81#define __ATTR_NULL { .attr = { .name = NULL } }
82
83#define attr_name(_attr) (_attr).attr.name
84
85struct file;
86struct vm_area_struct;
87
88struct bin_attribute {
89 struct attribute attr;
90 size_t size;
91 void *private;
92 ssize_t (*read)(struct file *, struct kobject *, struct bin_attribute *,
93 char *, loff_t, size_t);
94 ssize_t (*write)(struct file *,struct kobject *, struct bin_attribute *,
95 char *, loff_t, size_t);
96 int (*mmap)(struct file *, struct kobject *, struct bin_attribute *attr,
97 struct vm_area_struct *vma);
98};
99
100
101
102
103
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107
108
109
110#define sysfs_bin_attr_init(bin_attr) sysfs_attr_init(&(bin_attr)->attr)
111
112struct sysfs_ops {
113 ssize_t (*show)(struct kobject *, struct attribute *,char *);
114 ssize_t (*store)(struct kobject *,struct attribute *,const char *, size_t);
115};
116
117struct sysfs_dirent;
118
119#ifdef CONFIG_SYSFS
120
121int sysfs_schedule_callback(struct kobject *kobj, void (*func)(void *),
122 void *data, struct module *owner);
123
124int __must_check sysfs_create_dir(struct kobject *kobj);
125void sysfs_remove_dir(struct kobject *kobj);
126int __must_check sysfs_rename_dir(struct kobject *kobj, const char *new_name);
127int __must_check sysfs_move_dir(struct kobject *kobj,
128 struct kobject *new_parent_kobj);
129
130int __must_check sysfs_create_file(struct kobject *kobj,
131 const struct attribute *attr);
132int __must_check sysfs_create_files(struct kobject *kobj,
133 const struct attribute **attr);
134int __must_check sysfs_chmod_file(struct kobject *kobj,
135 const struct attribute *attr, mode_t mode);
136void sysfs_remove_file(struct kobject *kobj, const struct attribute *attr);
137void sysfs_remove_files(struct kobject *kobj, const struct attribute **attr);
138
139int __must_check sysfs_create_bin_file(struct kobject *kobj,
140 const struct bin_attribute *attr);
141void sysfs_remove_bin_file(struct kobject *kobj,
142 const struct bin_attribute *attr);
143
144int __must_check sysfs_create_link(struct kobject *kobj, struct kobject *target,
145 const char *name);
146int __must_check sysfs_create_link_nowarn(struct kobject *kobj,
147 struct kobject *target,
148 const char *name);
149void sysfs_remove_link(struct kobject *kobj, const char *name);
150
151int sysfs_rename_link(struct kobject *kobj, struct kobject *target,
152 const char *old_name, const char *new_name);
153
154void sysfs_delete_link(struct kobject *dir, struct kobject *targ,
155 const char *name);
156
157int __must_check sysfs_create_group(struct kobject *kobj,
158 const struct attribute_group *grp);
159int sysfs_update_group(struct kobject *kobj,
160 const struct attribute_group *grp);
161void sysfs_remove_group(struct kobject *kobj,
162 const struct attribute_group *grp);
163int sysfs_add_file_to_group(struct kobject *kobj,
164 const struct attribute *attr, const char *group);
165void sysfs_remove_file_from_group(struct kobject *kobj,
166 const struct attribute *attr, const char *group);
167int sysfs_merge_group(struct kobject *kobj,
168 const struct attribute_group *grp);
169void sysfs_unmerge_group(struct kobject *kobj,
170 const struct attribute_group *grp);
171
172void sysfs_notify(struct kobject *kobj, const char *dir, const char *attr);
173void sysfs_notify_dirent(struct sysfs_dirent *sd);
174struct sysfs_dirent *sysfs_get_dirent(struct sysfs_dirent *parent_sd,
175 const void *ns,
176 const unsigned char *name);
177struct sysfs_dirent *sysfs_get(struct sysfs_dirent *sd);
178void sysfs_put(struct sysfs_dirent *sd);
179void sysfs_printk_last_file(void);
180
181
182void sysfs_exit_ns(enum kobj_ns_type type, const void *tag);
183
184int __must_check sysfs_init(void);
185
186#else
187
188static inline int sysfs_schedule_callback(struct kobject *kobj,
189 void (*func)(void *), void *data, struct module *owner)
190{
191 return -ENOSYS;
192}
193
194static inline int sysfs_create_dir(struct kobject *kobj)
195{
196 return 0;
197}
198
199static inline void sysfs_remove_dir(struct kobject *kobj)
200{
201}
202
203static inline int sysfs_rename_dir(struct kobject *kobj, const char *new_name)
204{
205 return 0;
206}
207
208static inline int sysfs_move_dir(struct kobject *kobj,
209 struct kobject *new_parent_kobj)
210{
211 return 0;
212}
213
214static inline int sysfs_create_file(struct kobject *kobj,
215 const struct attribute *attr)
216{
217 return 0;
218}
219
220static inline int sysfs_create_files(struct kobject *kobj,
221 const struct attribute **attr)
222{
223 return 0;
224}
225
226static inline int sysfs_chmod_file(struct kobject *kobj,
227 const struct attribute *attr, mode_t mode)
228{
229 return 0;
230}
231
232static inline void sysfs_remove_file(struct kobject *kobj,
233 const struct attribute *attr)
234{
235}
236
237static inline void sysfs_remove_files(struct kobject *kobj,
238 const struct attribute **attr)
239{
240}
241
242static inline int sysfs_create_bin_file(struct kobject *kobj,
243 const struct bin_attribute *attr)
244{
245 return 0;
246}
247
248static inline void sysfs_remove_bin_file(struct kobject *kobj,
249 const struct bin_attribute *attr)
250{
251}
252
253static inline int sysfs_create_link(struct kobject *kobj,
254 struct kobject *target, const char *name)
255{
256 return 0;
257}
258
259static inline int sysfs_create_link_nowarn(struct kobject *kobj,
260 struct kobject *target,
261 const char *name)
262{
263 return 0;
264}
265
266static inline void sysfs_remove_link(struct kobject *kobj, const char *name)
267{
268}
269
270static inline int sysfs_rename_link(struct kobject *k, struct kobject *t,
271 const char *old_name, const char *new_name)
272{
273 return 0;
274}
275
276static inline void sysfs_delete_link(struct kobject *k, struct kobject *t,
277 const char *name)
278{
279}
280
281static inline int sysfs_create_group(struct kobject *kobj,
282 const struct attribute_group *grp)
283{
284 return 0;
285}
286
287static inline int sysfs_update_group(struct kobject *kobj,
288 const struct attribute_group *grp)
289{
290 return 0;
291}
292
293static inline void sysfs_remove_group(struct kobject *kobj,
294 const struct attribute_group *grp)
295{
296}
297
298static inline int sysfs_add_file_to_group(struct kobject *kobj,
299 const struct attribute *attr, const char *group)
300{
301 return 0;
302}
303
304static inline void sysfs_remove_file_from_group(struct kobject *kobj,
305 const struct attribute *attr, const char *group)
306{
307}
308
309static inline int sysfs_merge_group(struct kobject *kobj,
310 const struct attribute_group *grp)
311{
312 return 0;
313}
314
315static inline void sysfs_unmerge_group(struct kobject *kobj,
316 const struct attribute_group *grp)
317{
318}
319
320static inline void sysfs_notify(struct kobject *kobj, const char *dir,
321 const char *attr)
322{
323}
324static inline void sysfs_notify_dirent(struct sysfs_dirent *sd)
325{
326}
327static inline
328struct sysfs_dirent *sysfs_get_dirent(struct sysfs_dirent *parent_sd,
329 const void *ns,
330 const unsigned char *name)
331{
332 return NULL;
333}
334static inline struct sysfs_dirent *sysfs_get(struct sysfs_dirent *sd)
335{
336 return NULL;
337}
338static inline void sysfs_put(struct sysfs_dirent *sd)
339{
340}
341
342static inline void sysfs_exit_ns(int type, const void *tag)
343{
344}
345
346static inline int __must_check sysfs_init(void)
347{
348 return 0;
349}
350
351static inline void sysfs_printk_last_file(void)
352{
353}
354
355#endif
356
357#endif
358