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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 <linux/compiler.h>
14#include <asm/atomic.h>
15
16struct kobject;
17struct module;
18
19struct attribute {
20 const char * name;
21 struct module * owner;
22 mode_t mode;
23};
24
25struct attribute_group {
26 const char * name;
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
52struct vm_area_struct;
53
54struct 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
64struct 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
69struct 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;
77 struct iattr * s_iattr;
78 atomic_t s_event;
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
90extern int __must_check
91sysfs_create_dir(struct kobject *);
92
93extern void
94sysfs_remove_dir(struct kobject *);
95
96extern int __must_check
97sysfs_rename_dir(struct kobject *, const char *new_name);
98
99extern int __must_check
100sysfs_move_dir(struct kobject *, struct kobject *);
101
102extern int __must_check
103sysfs_create_file(struct kobject *, const struct attribute *);
104
105extern int __must_check
106sysfs_update_file(struct kobject *, const struct attribute *);
107
108extern int __must_check
109sysfs_chmod_file(struct kobject *kobj, struct attribute *attr, mode_t mode);
110
111extern void
112sysfs_remove_file(struct kobject *, const struct attribute *);
113
114extern int __must_check
115sysfs_create_link(struct kobject * kobj, struct kobject * target, const char * name);
116
117extern void
118sysfs_remove_link(struct kobject *, const char * name);
119
120int __must_check sysfs_create_bin_file(struct kobject *kobj,
121 struct bin_attribute *attr);
122void sysfs_remove_bin_file(struct kobject *kobj, struct bin_attribute *attr);
123
124int __must_check sysfs_create_group(struct kobject *,
125 const struct attribute_group *);
126void sysfs_remove_group(struct kobject *, const struct attribute_group *);
127void sysfs_notify(struct kobject * k, char *dir, char *attr);
128
129extern int __must_check sysfs_init(void);
130
131#else /* CONFIG_SYSFS */
132
133static inline int sysfs_create_dir(struct kobject * k)
134{
135 return 0;
136}
137
138static inline void sysfs_remove_dir(struct kobject * k)
139{
140 ;
141}
142
143static inline int sysfs_rename_dir(struct kobject * k, const char *new_name)
144{
145 return 0;
146}
147
148static inline int sysfs_move_dir(struct kobject * k, struct kobject * new_parent)
149{
150 return 0;
151}
152
153static inline int sysfs_create_file(struct kobject * k, const struct attribute * a)
154{
155 return 0;
156}
157
158static inline int sysfs_update_file(struct kobject * k, const struct attribute * a)
159{
160 return 0;
161}
162static inline int sysfs_chmod_file(struct kobject *kobj, struct attribute *attr, mode_t mode)
163{
164 return 0;
165}
166
167static inline void sysfs_remove_file(struct kobject * k, const struct attribute * a)
168{
169 ;
170}
171
172static inline int sysfs_create_link(struct kobject * k, struct kobject * t, const char * n)
173{
174 return 0;
175}
176
177static inline void sysfs_remove_link(struct kobject * k, const char * name)
178{
179 ;
180}
181
182
183static inline int sysfs_create_bin_file(struct kobject * k, struct bin_attribute * a)
184{
185 return 0;
186}
187
188static inline int sysfs_remove_bin_file(struct kobject * k, struct bin_attribute * a)
189{
190 return 0;
191}
192
193static inline int sysfs_create_group(struct kobject * k, const struct attribute_group *g)
194{
195 return 0;
196}
197
198static inline void sysfs_remove_group(struct kobject * k, const struct attribute_group * g)
199{
200 ;
201}
202
203static inline void sysfs_notify(struct kobject * k, char *dir, char *attr)
204{
205}
206
207static inline int __must_check sysfs_init(void)
208{
209 return 0;
210}
211
212#endif /* CONFIG_SYSFS */
213
214#endif /* _SYSFS_H_ */