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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. | |
6 | * | |
7 | * Please see Documentation/filesystems/sysfs.txt for more information. | |
8 | */ | |
9 | ||
10 | #ifndef _SYSFS_H_ | |
11 | #define _SYSFS_H_ | |
12 | ||
4a7fb636 | 13 | #include <linux/compiler.h> |
5851fadc | 14 | #include <linux/errno.h> |
bf0acc33 | 15 | #include <linux/list.h> |
1da177e4 LT |
16 | #include <asm/atomic.h> |
17 | ||
18 | struct kobject; | |
19 | struct module; | |
b592fcfe | 20 | struct nameidata; |
d56c3eae | 21 | struct dentry; |
1da177e4 LT |
22 | |
23 | struct attribute { | |
d48593bf | 24 | const char * name; |
1da177e4 LT |
25 | struct module * owner; |
26 | mode_t mode; | |
27 | }; | |
28 | ||
29 | struct attribute_group { | |
d48593bf | 30 | const char * name; |
1da177e4 LT |
31 | struct attribute ** attrs; |
32 | }; | |
33 | ||
34 | ||
35 | ||
36 | /** | |
37 | * Use these macros to make defining attributes easier. See include/linux/device.h | |
38 | * for examples.. | |
39 | */ | |
40 | ||
41 | #define __ATTR(_name,_mode,_show,_store) { \ | |
42 | .attr = {.name = __stringify(_name), .mode = _mode, .owner = THIS_MODULE }, \ | |
43 | .show = _show, \ | |
44 | .store = _store, \ | |
45 | } | |
46 | ||
47 | #define __ATTR_RO(_name) { \ | |
48 | .attr = { .name = __stringify(_name), .mode = 0444, .owner = THIS_MODULE }, \ | |
49 | .show = _name##_show, \ | |
50 | } | |
51 | ||
52 | #define __ATTR_NULL { .attr = { .name = NULL } } | |
53 | ||
54 | #define attr_name(_attr) (_attr).attr.name | |
55 | ||
56 | struct vm_area_struct; | |
57 | ||
58 | struct bin_attribute { | |
59 | struct attribute attr; | |
60 | size_t size; | |
61 | void *private; | |
62 | ssize_t (*read)(struct kobject *, char *, loff_t, size_t); | |
63 | ssize_t (*write)(struct kobject *, char *, loff_t, size_t); | |
64 | int (*mmap)(struct kobject *, struct bin_attribute *attr, | |
65 | struct vm_area_struct *vma); | |
66 | }; | |
67 | ||
68 | struct sysfs_ops { | |
69 | ssize_t (*show)(struct kobject *, struct attribute *,char *); | |
70 | ssize_t (*store)(struct kobject *,struct attribute *,const char *, size_t); | |
71 | }; | |
72 | ||
1da177e4 LT |
73 | #define SYSFS_ROOT 0x0001 |
74 | #define SYSFS_DIR 0x0002 | |
75 | #define SYSFS_KOBJ_ATTR 0x0004 | |
76 | #define SYSFS_KOBJ_BIN_ATTR 0x0008 | |
77 | #define SYSFS_KOBJ_LINK 0x0020 | |
78 | #define SYSFS_NOT_PINNED (SYSFS_KOBJ_ATTR | SYSFS_KOBJ_BIN_ATTR | SYSFS_KOBJ_LINK) | |
0c096b50 | 79 | #define SYSFS_COPY_NAME (SYSFS_DIR | SYSFS_KOBJ_LINK) |
1da177e4 LT |
80 | |
81 | #ifdef CONFIG_SYSFS | |
82 | ||
d9a9cdfb | 83 | extern int sysfs_schedule_callback(struct kobject *kobj, |
523ded71 | 84 | void (*func)(void *), void *data, struct module *owner); |
d9a9cdfb | 85 | |
4a7fb636 | 86 | extern int __must_check |
b592fcfe | 87 | sysfs_create_dir(struct kobject *, struct dentry *); |
1da177e4 LT |
88 | |
89 | extern void | |
90 | sysfs_remove_dir(struct kobject *); | |
91 | ||
4a7fb636 | 92 | extern int __must_check |
b592fcfe | 93 | sysfs_rename_dir(struct kobject *, struct dentry *, const char *new_name); |
1da177e4 | 94 | |
8a82472f CH |
95 | extern int __must_check |
96 | sysfs_move_dir(struct kobject *, struct kobject *); | |
97 | ||
4a7fb636 | 98 | extern int __must_check |
1da177e4 LT |
99 | sysfs_create_file(struct kobject *, const struct attribute *); |
100 | ||
4a7fb636 | 101 | extern int __must_check |
1da177e4 LT |
102 | sysfs_update_file(struct kobject *, const struct attribute *); |
103 | ||
4a7fb636 | 104 | extern int __must_check |
31e5abe9 KS |
105 | sysfs_chmod_file(struct kobject *kobj, struct attribute *attr, mode_t mode); |
106 | ||
1da177e4 LT |
107 | extern void |
108 | sysfs_remove_file(struct kobject *, const struct attribute *); | |
109 | ||
4a7fb636 | 110 | extern int __must_check |
e3a15db2 | 111 | sysfs_create_link(struct kobject * kobj, struct kobject * target, const char * name); |
1da177e4 LT |
112 | |
113 | extern void | |
e3a15db2 | 114 | sysfs_remove_link(struct kobject *, const char * name); |
1da177e4 | 115 | |
4a7fb636 AM |
116 | int __must_check sysfs_create_bin_file(struct kobject *kobj, |
117 | struct bin_attribute *attr); | |
995982ca | 118 | void sysfs_remove_bin_file(struct kobject *kobj, struct bin_attribute *attr); |
1da177e4 | 119 | |
4a7fb636 AM |
120 | int __must_check sysfs_create_group(struct kobject *, |
121 | const struct attribute_group *); | |
1da177e4 | 122 | void sysfs_remove_group(struct kobject *, const struct attribute_group *); |
dfa87c82 AS |
123 | int sysfs_add_file_to_group(struct kobject *kobj, |
124 | const struct attribute *attr, const char *group); | |
125 | void sysfs_remove_file_from_group(struct kobject *kobj, | |
126 | const struct attribute *attr, const char *group); | |
127 | ||
4508a7a7 | 128 | void sysfs_notify(struct kobject * k, char *dir, char *attr); |
1da177e4 | 129 | |
b592fcfe EB |
130 | |
131 | extern int sysfs_make_shadowed_dir(struct kobject *kobj, | |
132 | void * (*follow_link)(struct dentry *, struct nameidata *)); | |
133 | extern struct dentry *sysfs_create_shadow_dir(struct kobject *kobj); | |
134 | extern void sysfs_remove_shadow_dir(struct dentry *dir); | |
135 | ||
f20a9ead AM |
136 | extern int __must_check sysfs_init(void); |
137 | ||
1da177e4 LT |
138 | #else /* CONFIG_SYSFS */ |
139 | ||
d9a9cdfb | 140 | static inline int sysfs_schedule_callback(struct kobject *kobj, |
523ded71 | 141 | void (*func)(void *), void *data, struct module *owner) |
d9a9cdfb AS |
142 | { |
143 | return -ENOSYS; | |
144 | } | |
145 | ||
b592fcfe | 146 | static inline int sysfs_create_dir(struct kobject * k, struct dentry *shadow) |
1da177e4 LT |
147 | { |
148 | return 0; | |
149 | } | |
150 | ||
151 | static inline void sysfs_remove_dir(struct kobject * k) | |
152 | { | |
153 | ; | |
154 | } | |
155 | ||
b592fcfe EB |
156 | static inline int sysfs_rename_dir(struct kobject * k, |
157 | struct dentry *new_parent, | |
158 | const char *new_name) | |
1da177e4 LT |
159 | { |
160 | return 0; | |
161 | } | |
162 | ||
8a82472f CH |
163 | static inline int sysfs_move_dir(struct kobject * k, struct kobject * new_parent) |
164 | { | |
165 | return 0; | |
166 | } | |
167 | ||
1da177e4 LT |
168 | static inline int sysfs_create_file(struct kobject * k, const struct attribute * a) |
169 | { | |
170 | return 0; | |
171 | } | |
172 | ||
173 | static inline int sysfs_update_file(struct kobject * k, const struct attribute * a) | |
174 | { | |
175 | return 0; | |
176 | } | |
31e5abe9 KS |
177 | static inline int sysfs_chmod_file(struct kobject *kobj, struct attribute *attr, mode_t mode) |
178 | { | |
179 | return 0; | |
180 | } | |
1da177e4 LT |
181 | |
182 | static inline void sysfs_remove_file(struct kobject * k, const struct attribute * a) | |
183 | { | |
184 | ; | |
185 | } | |
186 | ||
e3a15db2 | 187 | static inline int sysfs_create_link(struct kobject * k, struct kobject * t, const char * n) |
1da177e4 LT |
188 | { |
189 | return 0; | |
190 | } | |
191 | ||
e3a15db2 | 192 | static inline void sysfs_remove_link(struct kobject * k, const char * name) |
1da177e4 LT |
193 | { |
194 | ; | |
195 | } | |
196 | ||
197 | ||
198 | static inline int sysfs_create_bin_file(struct kobject * k, struct bin_attribute * a) | |
199 | { | |
200 | return 0; | |
201 | } | |
202 | ||
203 | static inline int sysfs_remove_bin_file(struct kobject * k, struct bin_attribute * a) | |
204 | { | |
205 | return 0; | |
206 | } | |
207 | ||
208 | static inline int sysfs_create_group(struct kobject * k, const struct attribute_group *g) | |
209 | { | |
210 | return 0; | |
211 | } | |
212 | ||
213 | static inline void sysfs_remove_group(struct kobject * k, const struct attribute_group * g) | |
214 | { | |
215 | ; | |
216 | } | |
217 | ||
dfa87c82 AS |
218 | static inline int sysfs_add_file_to_group(struct kobject *kobj, |
219 | const struct attribute *attr, const char *group) | |
220 | { | |
221 | return 0; | |
222 | } | |
223 | ||
224 | static inline void sysfs_remove_file_from_group(struct kobject *kobj, | |
d701d8a3 | 225 | const struct attribute *attr, const char *group) |
dfa87c82 | 226 | { |
dfa87c82 AS |
227 | } |
228 | ||
4508a7a7 N |
229 | static inline void sysfs_notify(struct kobject * k, char *dir, char *attr) |
230 | { | |
231 | } | |
232 | ||
b592fcfe EB |
233 | static inline int sysfs_make_shadowed_dir(struct kobject *kobj, |
234 | void * (*follow_link)(struct dentry *, struct nameidata *)) | |
235 | { | |
236 | return 0; | |
237 | } | |
238 | ||
f20a9ead AM |
239 | static inline int __must_check sysfs_init(void) |
240 | { | |
241 | return 0; | |
242 | } | |
243 | ||
1da177e4 LT |
244 | #endif /* CONFIG_SYSFS */ |
245 | ||
246 | #endif /* _SYSFS_H_ */ |