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	const char		* name;
20	struct module 		* owner;
21	mode_t			mode;
22};
23
24struct attribute_group {
25	const 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	struct iattr		* s_iattr;
77	atomic_t		s_event;
78};
79
80#define SYSFS_ROOT		0x0001
81#define SYSFS_DIR		0x0002
82#define SYSFS_KOBJ_ATTR 	0x0004
83#define SYSFS_KOBJ_BIN_ATTR	0x0008
84#define SYSFS_KOBJ_DEVICE   0x0010
85#define SYSFS_KOBJ_LINK 	0x0020
86#define SYSFS_NOT_PINNED	(SYSFS_KOBJ_ATTR | SYSFS_KOBJ_BIN_ATTR | SYSFS_KOBJ_DEVICE | SYSFS_KOBJ_LINK)
87
88#ifdef CONFIG_SYSFS
89
90extern int
91sysfs_create_dir(struct kobject *);
92
93extern void
94sysfs_remove_dir(struct kobject *);
95
96extern int
97sysfs_rename_dir(struct kobject *, const char *new_name);
98
99extern int
100sysfs_create_file(struct kobject *, const struct attribute *);
101
102extern int
103sysfs_update_file(struct kobject *, const struct attribute *);
104
105extern int
106sysfs_chmod_file(struct kobject *kobj, struct attribute *attr, mode_t mode);
107
108extern void
109sysfs_remove_file(struct kobject *, const struct attribute *);
110
111extern int
112sysfs_create_link(struct kobject * kobj, struct kobject * target, const char * name);
113
114extern void
115sysfs_remove_link(struct kobject *, const char * name);
116
117int sysfs_create_bin_file(struct kobject * kobj, struct bin_attribute * attr);
118int sysfs_remove_bin_file(struct kobject * kobj, struct bin_attribute * attr);
119
120int sysfs_create_group(struct kobject *, const struct attribute_group *);
121void sysfs_remove_group(struct kobject *, const struct attribute_group *);
122void sysfs_notify(struct kobject * k, char *dir, char *attr);
123
124void sysfs_create_device(struct kobject *, dev_t dev, mode_t mode);
125
126#else /* CONFIG_SYSFS */
127
128static inline int sysfs_create_dir(struct kobject * k)
129{
130	return 0;
131}
132
133static inline void sysfs_remove_dir(struct kobject * k)
134{
135	;
136}
137
138static inline int sysfs_rename_dir(struct kobject * k, const char *new_name)
139{
140	return 0;
141}
142
143static inline int sysfs_create_file(struct kobject * k, const struct attribute * a)
144{
145	return 0;
146}
147
148static inline int sysfs_update_file(struct kobject * k, const struct attribute * a)
149{
150	return 0;
151}
152static inline int sysfs_chmod_file(struct kobject *kobj, struct attribute *attr, mode_t mode)
153{
154	return 0;
155}
156
157static inline void sysfs_remove_file(struct kobject * k, const struct attribute * a)
158{
159	;
160}
161
162static inline int sysfs_create_link(struct kobject * k, struct kobject * t, const char * n)
163{
164	return 0;
165}
166
167static inline void sysfs_remove_link(struct kobject * k, const char * name)
168{
169	;
170}
171
172
173static inline int sysfs_create_bin_file(struct kobject * k, struct bin_attribute * a)
174{
175	return 0;
176}
177
178static inline int sysfs_remove_bin_file(struct kobject * k, struct bin_attribute * a)
179{
180	return 0;
181}
182
183static inline int sysfs_create_group(struct kobject * k, const struct attribute_group *g)
184{
185	return 0;
186}
187
188static inline void sysfs_remove_group(struct kobject * k, const struct attribute_group * g)
189{
190	;
191}
192
193static inline void sysfs_notify(struct kobject * k, char *dir, char *attr)
194{
195}
196
197static inline void sysfs_create_device(struct kobject * k, dev_t d, mode_t m)
198{
199	;
200}
201
202#endif /* CONFIG_SYSFS */
203
204#endif /* _SYSFS_H_ */
205