Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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_create_file(struct kobject *, const struct attribute *);
101
102extern int __must_check
103sysfs_update_file(struct kobject *, const struct attribute *);
104
105extern int __must_check
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 __must_check
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 __must_check sysfs_create_bin_file(struct kobject *kobj,
118 struct bin_attribute *attr);
119void sysfs_remove_bin_file(struct kobject *kobj, struct bin_attribute *attr);
120
121int __must_check sysfs_create_group(struct kobject *,
122 const struct attribute_group *);
123void sysfs_remove_group(struct kobject *, const struct attribute_group *);
124void sysfs_notify(struct kobject * k, char *dir, char *attr);
125
126extern int __must_check sysfs_init(void);
127
128#else /* CONFIG_SYSFS */
129
130static inline int sysfs_create_dir(struct kobject * k)
131{
132 return 0;
133}
134
135static inline void sysfs_remove_dir(struct kobject * k)
136{
137 ;
138}
139
140static inline int sysfs_rename_dir(struct kobject * k, const char *new_name)
141{
142 return 0;
143}
144
145static inline int sysfs_create_file(struct kobject * k, const struct attribute * a)
146{
147 return 0;
148}
149
150static inline int sysfs_update_file(struct kobject * k, const struct attribute * a)
151{
152 return 0;
153}
154static inline int sysfs_chmod_file(struct kobject *kobj, struct attribute *attr, mode_t mode)
155{
156 return 0;
157}
158
159static inline void sysfs_remove_file(struct kobject * k, const struct attribute * a)
160{
161 ;
162}
163
164static inline int sysfs_create_link(struct kobject * k, struct kobject * t, const char * n)
165{
166 return 0;
167}
168
169static inline void sysfs_remove_link(struct kobject * k, const char * name)
170{
171 ;
172}
173
174
175static inline int sysfs_create_bin_file(struct kobject * k, struct bin_attribute * a)
176{
177 return 0;
178}
179
180static inline int sysfs_remove_bin_file(struct kobject * k, struct bin_attribute * a)
181{
182 return 0;
183}
184
185static inline int sysfs_create_group(struct kobject * k, const struct attribute_group *g)
186{
187 return 0;
188}
189
190static inline void sysfs_remove_group(struct kobject * k, const struct attribute_group * g)
191{
192 ;
193}
194
195static inline void sysfs_notify(struct kobject * k, char *dir, char *attr)
196{
197}
198
199static inline int __must_check sysfs_init(void)
200{
201 return 0;
202}
203
204#endif /* CONFIG_SYSFS */
205
206#endif /* _SYSFS_H_ */