Commit | Line | Data |
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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> |
bf0acc33 | 14 | #include <linux/list.h> |
1da177e4 LT |
15 | #include <asm/atomic.h> |
16 | ||
17 | struct kobject; | |
18 | struct module; | |
b592fcfe | 19 | struct nameidata; |
1da177e4 LT |
20 | |
21 | struct attribute { | |
d48593bf | 22 | const char * name; |
1da177e4 LT |
23 | struct module * owner; |
24 | mode_t mode; | |
25 | }; | |
26 | ||
27 | struct attribute_group { | |
d48593bf | 28 | const char * name; |
1da177e4 LT |
29 | struct attribute ** attrs; |
30 | }; | |
31 | ||
32 | ||
33 | ||
34 | /** | |
35 | * Use these macros to make defining attributes easier. See include/linux/device.h | |
36 | * for examples.. | |
37 | */ | |
38 | ||
39 | #define __ATTR(_name,_mode,_show,_store) { \ | |
40 | .attr = {.name = __stringify(_name), .mode = _mode, .owner = THIS_MODULE }, \ | |
41 | .show = _show, \ | |
42 | .store = _store, \ | |
43 | } | |
44 | ||
45 | #define __ATTR_RO(_name) { \ | |
46 | .attr = { .name = __stringify(_name), .mode = 0444, .owner = THIS_MODULE }, \ | |
47 | .show = _name##_show, \ | |
48 | } | |
49 | ||
50 | #define __ATTR_NULL { .attr = { .name = NULL } } | |
51 | ||
52 | #define attr_name(_attr) (_attr).attr.name | |
53 | ||
54 | struct vm_area_struct; | |
55 | ||
56 | struct bin_attribute { | |
57 | struct attribute attr; | |
58 | size_t size; | |
59 | void *private; | |
60 | ssize_t (*read)(struct kobject *, char *, loff_t, size_t); | |
61 | ssize_t (*write)(struct kobject *, char *, loff_t, size_t); | |
62 | int (*mmap)(struct kobject *, struct bin_attribute *attr, | |
63 | struct vm_area_struct *vma); | |
64 | }; | |
65 | ||
66 | struct sysfs_ops { | |
67 | ssize_t (*show)(struct kobject *, struct attribute *,char *); | |
68 | ssize_t (*store)(struct kobject *,struct attribute *,const char *, size_t); | |
69 | }; | |
70 | ||
71 | struct sysfs_dirent { | |
72 | atomic_t s_count; | |
73 | struct list_head s_sibling; | |
74 | struct list_head s_children; | |
75 | void * s_element; | |
76 | int s_type; | |
77 | umode_t s_mode; | |
78 | struct dentry * s_dentry; | |
988d186d | 79 | struct iattr * s_iattr; |
4508a7a7 | 80 | atomic_t s_event; |
1da177e4 LT |
81 | }; |
82 | ||
83 | #define SYSFS_ROOT 0x0001 | |
84 | #define SYSFS_DIR 0x0002 | |
85 | #define SYSFS_KOBJ_ATTR 0x0004 | |
86 | #define SYSFS_KOBJ_BIN_ATTR 0x0008 | |
87 | #define SYSFS_KOBJ_LINK 0x0020 | |
88 | #define SYSFS_NOT_PINNED (SYSFS_KOBJ_ATTR | SYSFS_KOBJ_BIN_ATTR | SYSFS_KOBJ_LINK) | |
89 | ||
90 | #ifdef CONFIG_SYSFS | |
91 | ||
4a7fb636 | 92 | extern int __must_check |
b592fcfe | 93 | sysfs_create_dir(struct kobject *, struct dentry *); |
1da177e4 LT |
94 | |
95 | extern void | |
96 | sysfs_remove_dir(struct kobject *); | |
97 | ||
4a7fb636 | 98 | extern int __must_check |
b592fcfe | 99 | sysfs_rename_dir(struct kobject *, struct dentry *, const char *new_name); |
1da177e4 | 100 | |
8a82472f CH |
101 | extern int __must_check |
102 | sysfs_move_dir(struct kobject *, struct kobject *); | |
103 | ||
4a7fb636 | 104 | extern int __must_check |
1da177e4 LT |
105 | sysfs_create_file(struct kobject *, const struct attribute *); |
106 | ||
4a7fb636 | 107 | extern int __must_check |
1da177e4 LT |
108 | sysfs_update_file(struct kobject *, const struct attribute *); |
109 | ||
4a7fb636 | 110 | extern int __must_check |
31e5abe9 KS |
111 | sysfs_chmod_file(struct kobject *kobj, struct attribute *attr, mode_t mode); |
112 | ||
1da177e4 LT |
113 | extern void |
114 | sysfs_remove_file(struct kobject *, const struct attribute *); | |
115 | ||
4a7fb636 | 116 | extern int __must_check |
e3a15db2 | 117 | sysfs_create_link(struct kobject * kobj, struct kobject * target, const char * name); |
1da177e4 LT |
118 | |
119 | extern void | |
e3a15db2 | 120 | sysfs_remove_link(struct kobject *, const char * name); |
1da177e4 | 121 | |
4a7fb636 AM |
122 | int __must_check sysfs_create_bin_file(struct kobject *kobj, |
123 | struct bin_attribute *attr); | |
995982ca | 124 | void sysfs_remove_bin_file(struct kobject *kobj, struct bin_attribute *attr); |
1da177e4 | 125 | |
4a7fb636 AM |
126 | int __must_check sysfs_create_group(struct kobject *, |
127 | const struct attribute_group *); | |
1da177e4 | 128 | void sysfs_remove_group(struct kobject *, const struct attribute_group *); |
4508a7a7 | 129 | void sysfs_notify(struct kobject * k, char *dir, char *attr); |
1da177e4 | 130 | |
b592fcfe EB |
131 | |
132 | extern int sysfs_make_shadowed_dir(struct kobject *kobj, | |
133 | void * (*follow_link)(struct dentry *, struct nameidata *)); | |
134 | extern struct dentry *sysfs_create_shadow_dir(struct kobject *kobj); | |
135 | extern void sysfs_remove_shadow_dir(struct dentry *dir); | |
136 | ||
f20a9ead AM |
137 | extern int __must_check sysfs_init(void); |
138 | ||
1da177e4 LT |
139 | #else /* CONFIG_SYSFS */ |
140 | ||
b592fcfe | 141 | static inline int sysfs_create_dir(struct kobject * k, struct dentry *shadow) |
1da177e4 LT |
142 | { |
143 | return 0; | |
144 | } | |
145 | ||
146 | static inline void sysfs_remove_dir(struct kobject * k) | |
147 | { | |
148 | ; | |
149 | } | |
150 | ||
b592fcfe EB |
151 | static inline int sysfs_rename_dir(struct kobject * k, |
152 | struct dentry *new_parent, | |
153 | const char *new_name) | |
1da177e4 LT |
154 | { |
155 | return 0; | |
156 | } | |
157 | ||
8a82472f CH |
158 | static inline int sysfs_move_dir(struct kobject * k, struct kobject * new_parent) |
159 | { | |
160 | return 0; | |
161 | } | |
162 | ||
1da177e4 LT |
163 | static inline int sysfs_create_file(struct kobject * k, const struct attribute * a) |
164 | { | |
165 | return 0; | |
166 | } | |
167 | ||
168 | static inline int sysfs_update_file(struct kobject * k, const struct attribute * a) | |
169 | { | |
170 | return 0; | |
171 | } | |
31e5abe9 KS |
172 | static inline int sysfs_chmod_file(struct kobject *kobj, struct attribute *attr, mode_t mode) |
173 | { | |
174 | return 0; | |
175 | } | |
1da177e4 LT |
176 | |
177 | static inline void sysfs_remove_file(struct kobject * k, const struct attribute * a) | |
178 | { | |
179 | ; | |
180 | } | |
181 | ||
e3a15db2 | 182 | static inline int sysfs_create_link(struct kobject * k, struct kobject * t, const char * n) |
1da177e4 LT |
183 | { |
184 | return 0; | |
185 | } | |
186 | ||
e3a15db2 | 187 | static inline void sysfs_remove_link(struct kobject * k, const char * name) |
1da177e4 LT |
188 | { |
189 | ; | |
190 | } | |
191 | ||
192 | ||
193 | static inline int sysfs_create_bin_file(struct kobject * k, struct bin_attribute * a) | |
194 | { | |
195 | return 0; | |
196 | } | |
197 | ||
198 | static inline int sysfs_remove_bin_file(struct kobject * k, struct bin_attribute * a) | |
199 | { | |
200 | return 0; | |
201 | } | |
202 | ||
203 | static inline int sysfs_create_group(struct kobject * k, const struct attribute_group *g) | |
204 | { | |
205 | return 0; | |
206 | } | |
207 | ||
208 | static inline void sysfs_remove_group(struct kobject * k, const struct attribute_group * g) | |
209 | { | |
210 | ; | |
211 | } | |
212 | ||
4508a7a7 N |
213 | static inline void sysfs_notify(struct kobject * k, char *dir, char *attr) |
214 | { | |
215 | } | |
216 | ||
b592fcfe EB |
217 | static inline int sysfs_make_shadowed_dir(struct kobject *kobj, |
218 | void * (*follow_link)(struct dentry *, struct nameidata *)) | |
219 | { | |
220 | return 0; | |
221 | } | |
222 | ||
f20a9ead AM |
223 | static inline int __must_check sysfs_init(void) |
224 | { | |
225 | return 0; | |
226 | } | |
227 | ||
1da177e4 LT |
228 | #endif /* CONFIG_SYSFS */ |
229 | ||
230 | #endif /* _SYSFS_H_ */ |