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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
15struct kobject;
16struct module;
17
18struct attribute {
19 char * name;
20 struct module * owner;
21 mode_t mode;
22};
23
24struct 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
51struct vm_area_struct;
52
53struct 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
63struct 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
68struct 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
87extern int
88sysfs_create_dir(struct kobject *);
89
90extern void
91sysfs_remove_dir(struct kobject *);
92
93extern int
94sysfs_rename_dir(struct kobject *, const char *new_name);
95
96extern int
97sysfs_create_file(struct kobject *, const struct attribute *);
98
99extern int
100sysfs_update_file(struct kobject *, const struct attribute *);
101
102extern void
103sysfs_remove_file(struct kobject *, const struct attribute *);
104
105extern int
106sysfs_create_link(struct kobject * kobj, struct kobject * target, char * name);
107
108extern void
109sysfs_remove_link(struct kobject *, char * name);
110
111int sysfs_create_bin_file(struct kobject * kobj, struct bin_attribute * attr);
112int sysfs_remove_bin_file(struct kobject * kobj, struct bin_attribute * attr);
113
114int sysfs_create_group(struct kobject *, const struct attribute_group *);
115void sysfs_remove_group(struct kobject *, const struct attribute_group *);
116
117#else /* CONFIG_SYSFS */
118
119static inline int sysfs_create_dir(struct kobject * k)
120{
121 return 0;
122}
123
124static inline void sysfs_remove_dir(struct kobject * k)
125{
126 ;
127}
128
129static inline int sysfs_rename_dir(struct kobject * k, const char *new_name)
130{
131 return 0;
132}
133
134static inline int sysfs_create_file(struct kobject * k, const struct attribute * a)
135{
136 return 0;
137}
138
139static inline int sysfs_update_file(struct kobject * k, const struct attribute * a)
140{
141 return 0;
142}
143
144static inline void sysfs_remove_file(struct kobject * k, const struct attribute * a)
145{
146 ;
147}
148
149static inline int sysfs_create_link(struct kobject * k, struct kobject * t, char * n)
150{
151 return 0;
152}
153
154static inline void sysfs_remove_link(struct kobject * k, char * name)
155{
156 ;
157}
158
159
160static inline int sysfs_create_bin_file(struct kobject * k, struct bin_attribute * a)
161{
162 return 0;
163}
164
165static inline int sysfs_remove_bin_file(struct kobject * k, struct bin_attribute * a)
166{
167 return 0;
168}
169
170static inline int sysfs_create_group(struct kobject * k, const struct attribute_group *g)
171{
172 return 0;
173}
174
175static 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_ */