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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 { | |
19 | char * name; | |
20 | struct module * owner; | |
21 | mode_t mode; | |
22 | }; | |
23 | ||
24 | struct attribute_group { | |
25 | char * name; | |
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; | |
76 | }; | |
77 | ||
78 | #define SYSFS_ROOT 0x0001 | |
79 | #define SYSFS_DIR 0x0002 | |
80 | #define SYSFS_KOBJ_ATTR 0x0004 | |
81 | #define SYSFS_KOBJ_BIN_ATTR 0x0008 | |
82 | #define SYSFS_KOBJ_LINK 0x0020 | |
83 | #define SYSFS_NOT_PINNED (SYSFS_KOBJ_ATTR | SYSFS_KOBJ_BIN_ATTR | SYSFS_KOBJ_LINK) | |
84 | ||
85 | #ifdef CONFIG_SYSFS | |
86 | ||
87 | extern int | |
88 | sysfs_create_dir(struct kobject *); | |
89 | ||
90 | extern void | |
91 | sysfs_remove_dir(struct kobject *); | |
92 | ||
93 | extern int | |
94 | sysfs_rename_dir(struct kobject *, const char *new_name); | |
95 | ||
96 | extern int | |
97 | sysfs_create_file(struct kobject *, const struct attribute *); | |
98 | ||
99 | extern int | |
100 | sysfs_update_file(struct kobject *, const struct attribute *); | |
101 | ||
102 | extern void | |
103 | sysfs_remove_file(struct kobject *, const struct attribute *); | |
104 | ||
105 | extern int | |
106 | sysfs_create_link(struct kobject * kobj, struct kobject * target, char * name); | |
107 | ||
108 | extern void | |
109 | sysfs_remove_link(struct kobject *, char * name); | |
110 | ||
111 | int sysfs_create_bin_file(struct kobject * kobj, struct bin_attribute * attr); | |
112 | int sysfs_remove_bin_file(struct kobject * kobj, struct bin_attribute * attr); | |
113 | ||
114 | int sysfs_create_group(struct kobject *, const struct attribute_group *); | |
115 | void sysfs_remove_group(struct kobject *, const struct attribute_group *); | |
116 | ||
117 | #else /* CONFIG_SYSFS */ | |
118 | ||
119 | static inline int sysfs_create_dir(struct kobject * k) | |
120 | { | |
121 | return 0; | |
122 | } | |
123 | ||
124 | static inline void sysfs_remove_dir(struct kobject * k) | |
125 | { | |
126 | ; | |
127 | } | |
128 | ||
129 | static inline int sysfs_rename_dir(struct kobject * k, const char *new_name) | |
130 | { | |
131 | return 0; | |
132 | } | |
133 | ||
134 | static inline int sysfs_create_file(struct kobject * k, const struct attribute * a) | |
135 | { | |
136 | return 0; | |
137 | } | |
138 | ||
139 | static inline int sysfs_update_file(struct kobject * k, const struct attribute * a) | |
140 | { | |
141 | return 0; | |
142 | } | |
143 | ||
144 | static inline void sysfs_remove_file(struct kobject * k, const struct attribute * a) | |
145 | { | |
146 | ; | |
147 | } | |
148 | ||
149 | static inline int sysfs_create_link(struct kobject * k, struct kobject * t, char * n) | |
150 | { | |
151 | return 0; | |
152 | } | |
153 | ||
154 | static inline void sysfs_remove_link(struct kobject * k, char * name) | |
155 | { | |
156 | ; | |
157 | } | |
158 | ||
159 | ||
160 | static inline int sysfs_create_bin_file(struct kobject * k, struct bin_attribute * a) | |
161 | { | |
162 | return 0; | |
163 | } | |
164 | ||
165 | static inline int sysfs_remove_bin_file(struct kobject * k, struct bin_attribute * a) | |
166 | { | |
167 | return 0; | |
168 | } | |
169 | ||
170 | static inline int sysfs_create_group(struct kobject * k, const struct attribute_group *g) | |
171 | { | |
172 | return 0; | |
173 | } | |
174 | ||
175 | static inline void sysfs_remove_group(struct kobject * k, const struct attribute_group * g) | |
176 | { | |
177 | ; | |
178 | } | |
179 | ||
180 | #endif /* CONFIG_SYSFS */ | |
181 | ||
182 | #endif /* _SYSFS_H_ */ |