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