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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> |
1da177e4 LT |
14 | #include <asm/atomic.h> |
15 | ||
16 | struct kobject; | |
17 | struct module; | |
18 | ||
19 | struct attribute { | |
d48593bf | 20 | const char * name; |
1da177e4 LT |
21 | struct module * owner; |
22 | mode_t mode; | |
23 | }; | |
24 | ||
25 | struct attribute_group { | |
d48593bf | 26 | const char * name; |
1da177e4 LT |
27 | struct attribute ** attrs; |
28 | }; | |
29 | ||
30 | ||
31 | ||
32 | /** | |
33 | * Use these macros to make defining attributes easier. See include/linux/device.h | |
34 | * for examples.. | |
35 | */ | |
36 | ||
37 | #define __ATTR(_name,_mode,_show,_store) { \ | |
38 | .attr = {.name = __stringify(_name), .mode = _mode, .owner = THIS_MODULE }, \ | |
39 | .show = _show, \ | |
40 | .store = _store, \ | |
41 | } | |
42 | ||
43 | #define __ATTR_RO(_name) { \ | |
44 | .attr = { .name = __stringify(_name), .mode = 0444, .owner = THIS_MODULE }, \ | |
45 | .show = _name##_show, \ | |
46 | } | |
47 | ||
48 | #define __ATTR_NULL { .attr = { .name = NULL } } | |
49 | ||
50 | #define attr_name(_attr) (_attr).attr.name | |
51 | ||
52 | struct vm_area_struct; | |
53 | ||
54 | struct bin_attribute { | |
55 | struct attribute attr; | |
56 | size_t size; | |
57 | void *private; | |
58 | ssize_t (*read)(struct kobject *, char *, loff_t, size_t); | |
59 | ssize_t (*write)(struct kobject *, char *, loff_t, size_t); | |
60 | int (*mmap)(struct kobject *, struct bin_attribute *attr, | |
61 | struct vm_area_struct *vma); | |
62 | }; | |
63 | ||
64 | struct sysfs_ops { | |
65 | ssize_t (*show)(struct kobject *, struct attribute *,char *); | |
66 | ssize_t (*store)(struct kobject *,struct attribute *,const char *, size_t); | |
67 | }; | |
68 | ||
69 | struct sysfs_dirent { | |
70 | atomic_t s_count; | |
71 | struct list_head s_sibling; | |
72 | struct list_head s_children; | |
73 | void * s_element; | |
74 | int s_type; | |
75 | umode_t s_mode; | |
76 | struct dentry * s_dentry; | |
988d186d | 77 | struct iattr * s_iattr; |
4508a7a7 | 78 | atomic_t s_event; |
1da177e4 LT |
79 | }; |
80 | ||
81 | #define SYSFS_ROOT 0x0001 | |
82 | #define SYSFS_DIR 0x0002 | |
83 | #define SYSFS_KOBJ_ATTR 0x0004 | |
84 | #define SYSFS_KOBJ_BIN_ATTR 0x0008 | |
85 | #define SYSFS_KOBJ_LINK 0x0020 | |
86 | #define SYSFS_NOT_PINNED (SYSFS_KOBJ_ATTR | SYSFS_KOBJ_BIN_ATTR | SYSFS_KOBJ_LINK) | |
87 | ||
88 | #ifdef CONFIG_SYSFS | |
89 | ||
4a7fb636 | 90 | extern int __must_check |
1da177e4 LT |
91 | sysfs_create_dir(struct kobject *); |
92 | ||
93 | extern void | |
94 | sysfs_remove_dir(struct kobject *); | |
95 | ||
4a7fb636 | 96 | extern int __must_check |
1da177e4 LT |
97 | sysfs_rename_dir(struct kobject *, const char *new_name); |
98 | ||
4a7fb636 | 99 | extern int __must_check |
1da177e4 LT |
100 | sysfs_create_file(struct kobject *, const struct attribute *); |
101 | ||
4a7fb636 | 102 | extern int __must_check |
1da177e4 LT |
103 | sysfs_update_file(struct kobject *, const struct attribute *); |
104 | ||
4a7fb636 | 105 | extern int __must_check |
31e5abe9 KS |
106 | sysfs_chmod_file(struct kobject *kobj, struct attribute *attr, mode_t mode); |
107 | ||
1da177e4 LT |
108 | extern void |
109 | sysfs_remove_file(struct kobject *, const struct attribute *); | |
110 | ||
4a7fb636 | 111 | extern int __must_check |
e3a15db2 | 112 | sysfs_create_link(struct kobject * kobj, struct kobject * target, const char * name); |
1da177e4 LT |
113 | |
114 | extern void | |
e3a15db2 | 115 | sysfs_remove_link(struct kobject *, const char * name); |
1da177e4 | 116 | |
4a7fb636 AM |
117 | int __must_check sysfs_create_bin_file(struct kobject *kobj, |
118 | struct bin_attribute *attr); | |
995982ca | 119 | void sysfs_remove_bin_file(struct kobject *kobj, struct bin_attribute *attr); |
1da177e4 | 120 | |
4a7fb636 AM |
121 | int __must_check sysfs_create_group(struct kobject *, |
122 | const struct attribute_group *); | |
1da177e4 | 123 | void sysfs_remove_group(struct kobject *, const struct attribute_group *); |
4508a7a7 | 124 | void sysfs_notify(struct kobject * k, char *dir, char *attr); |
1da177e4 | 125 | |
f20a9ead AM |
126 | extern int __must_check sysfs_init(void); |
127 | ||
1da177e4 LT |
128 | #else /* CONFIG_SYSFS */ |
129 | ||
130 | static inline int sysfs_create_dir(struct kobject * k) | |
131 | { | |
132 | return 0; | |
133 | } | |
134 | ||
135 | static inline void sysfs_remove_dir(struct kobject * k) | |
136 | { | |
137 | ; | |
138 | } | |
139 | ||
140 | static inline int sysfs_rename_dir(struct kobject * k, const char *new_name) | |
141 | { | |
142 | return 0; | |
143 | } | |
144 | ||
145 | static inline int sysfs_create_file(struct kobject * k, const struct attribute * a) | |
146 | { | |
147 | return 0; | |
148 | } | |
149 | ||
150 | static inline int sysfs_update_file(struct kobject * k, const struct attribute * a) | |
151 | { | |
152 | return 0; | |
153 | } | |
31e5abe9 KS |
154 | static inline int sysfs_chmod_file(struct kobject *kobj, struct attribute *attr, mode_t mode) |
155 | { | |
156 | return 0; | |
157 | } | |
1da177e4 LT |
158 | |
159 | static inline void sysfs_remove_file(struct kobject * k, const struct attribute * a) | |
160 | { | |
161 | ; | |
162 | } | |
163 | ||
e3a15db2 | 164 | static inline int sysfs_create_link(struct kobject * k, struct kobject * t, const char * n) |
1da177e4 LT |
165 | { |
166 | return 0; | |
167 | } | |
168 | ||
e3a15db2 | 169 | static inline void sysfs_remove_link(struct kobject * k, const char * name) |
1da177e4 LT |
170 | { |
171 | ; | |
172 | } | |
173 | ||
174 | ||
175 | static inline int sysfs_create_bin_file(struct kobject * k, struct bin_attribute * a) | |
176 | { | |
177 | return 0; | |
178 | } | |
179 | ||
180 | static inline int sysfs_remove_bin_file(struct kobject * k, struct bin_attribute * a) | |
181 | { | |
182 | return 0; | |
183 | } | |
184 | ||
185 | static inline int sysfs_create_group(struct kobject * k, const struct attribute_group *g) | |
186 | { | |
187 | return 0; | |
188 | } | |
189 | ||
190 | static inline void sysfs_remove_group(struct kobject * k, const struct attribute_group * g) | |
191 | { | |
192 | ; | |
193 | } | |
194 | ||
4508a7a7 N |
195 | static inline void sysfs_notify(struct kobject * k, char *dir, char *attr) |
196 | { | |
197 | } | |
198 | ||
f20a9ead AM |
199 | static inline int __must_check sysfs_init(void) |
200 | { | |
201 | return 0; | |
202 | } | |
203 | ||
1da177e4 LT |
204 | #endif /* CONFIG_SYSFS */ |
205 | ||
206 | #endif /* _SYSFS_H_ */ |