Merge branch 'master' into for-next
[linux-2.6/mini2440.git] / include / linux / sysfs.h
blob7858eac40aa7be8e27f9091806f2b194eabedd61
1 /*
2 * sysfs.h - definitions for the device driver filesystem
4 * Copyright (c) 2001,2002 Patrick Mochel
5 * Copyright (c) 2004 Silicon Graphics, Inc.
6 * Copyright (c) 2007 SUSE Linux Products GmbH
7 * Copyright (c) 2007 Tejun Heo <teheo@suse.de>
9 * Please see Documentation/filesystems/sysfs.txt for more information.
12 #ifndef _SYSFS_H_
13 #define _SYSFS_H_
15 #include <linux/compiler.h>
16 #include <linux/errno.h>
17 #include <linux/list.h>
18 #include <asm/atomic.h>
20 struct kobject;
21 struct module;
23 /* FIXME
24 * The *owner field is no longer used, but leave around
25 * until the tree gets cleaned up fully.
27 struct attribute {
28 const char *name;
29 struct module *owner;
30 mode_t mode;
33 struct attribute_group {
34 const char *name;
35 mode_t (*is_visible)(struct kobject *,
36 struct attribute *, int);
37 struct attribute **attrs;
42 /**
43 * Use these macros to make defining attributes easier. See include/linux/device.h
44 * for examples..
47 #define __ATTR(_name,_mode,_show,_store) { \
48 .attr = {.name = __stringify(_name), .mode = _mode }, \
49 .show = _show, \
50 .store = _store, \
53 #define __ATTR_RO(_name) { \
54 .attr = { .name = __stringify(_name), .mode = 0444 }, \
55 .show = _name##_show, \
58 #define __ATTR_NULL { .attr = { .name = NULL } }
60 #define attr_name(_attr) (_attr).attr.name
62 struct vm_area_struct;
64 struct bin_attribute {
65 struct attribute attr;
66 size_t size;
67 void *private;
68 ssize_t (*read)(struct kobject *, struct bin_attribute *,
69 char *, loff_t, size_t);
70 ssize_t (*write)(struct kobject *, struct bin_attribute *,
71 char *, loff_t, size_t);
72 int (*mmap)(struct kobject *, struct bin_attribute *attr,
73 struct vm_area_struct *vma);
76 struct sysfs_ops {
77 ssize_t (*show)(struct kobject *, struct attribute *,char *);
78 ssize_t (*store)(struct kobject *,struct attribute *,const char *, size_t);
81 #ifdef CONFIG_SYSFS
83 int sysfs_schedule_callback(struct kobject *kobj, void (*func)(void *),
84 void *data, struct module *owner);
86 int __must_check sysfs_create_dir(struct kobject *kobj);
87 void sysfs_remove_dir(struct kobject *kobj);
88 int __must_check sysfs_rename_dir(struct kobject *kobj, const char *new_name);
89 int __must_check sysfs_move_dir(struct kobject *kobj,
90 struct kobject *new_parent_kobj);
92 int __must_check sysfs_create_file(struct kobject *kobj,
93 const struct attribute *attr);
94 int __must_check sysfs_chmod_file(struct kobject *kobj, struct attribute *attr,
95 mode_t mode);
96 void sysfs_remove_file(struct kobject *kobj, const struct attribute *attr);
98 int __must_check sysfs_create_bin_file(struct kobject *kobj,
99 struct bin_attribute *attr);
100 void sysfs_remove_bin_file(struct kobject *kobj, struct bin_attribute *attr);
102 int __must_check sysfs_create_link(struct kobject *kobj, struct kobject *target,
103 const char *name);
104 void sysfs_remove_link(struct kobject *kobj, const char *name);
106 int __must_check sysfs_create_group(struct kobject *kobj,
107 const struct attribute_group *grp);
108 int sysfs_update_group(struct kobject *kobj,
109 const struct attribute_group *grp);
110 void sysfs_remove_group(struct kobject *kobj,
111 const struct attribute_group *grp);
112 int sysfs_add_file_to_group(struct kobject *kobj,
113 const struct attribute *attr, const char *group);
114 void sysfs_remove_file_from_group(struct kobject *kobj,
115 const struct attribute *attr, const char *group);
117 void sysfs_notify(struct kobject *kobj, char *dir, char *attr);
119 extern int __must_check sysfs_init(void);
121 #else /* CONFIG_SYSFS */
123 static inline int sysfs_schedule_callback(struct kobject *kobj,
124 void (*func)(void *), void *data, struct module *owner)
126 return -ENOSYS;
129 static inline int sysfs_create_dir(struct kobject *kobj)
131 return 0;
134 static inline void sysfs_remove_dir(struct kobject *kobj)
138 static inline int sysfs_rename_dir(struct kobject *kobj, const char *new_name)
140 return 0;
143 static inline int sysfs_move_dir(struct kobject *kobj,
144 struct kobject *new_parent_kobj)
146 return 0;
149 static inline int sysfs_create_file(struct kobject *kobj,
150 const struct attribute *attr)
152 return 0;
155 static inline int sysfs_chmod_file(struct kobject *kobj,
156 struct attribute *attr, mode_t mode)
158 return 0;
161 static inline void sysfs_remove_file(struct kobject *kobj,
162 const struct attribute *attr)
166 static inline int sysfs_create_bin_file(struct kobject *kobj,
167 struct bin_attribute *attr)
169 return 0;
172 static inline void sysfs_remove_bin_file(struct kobject *kobj,
173 struct bin_attribute *attr)
177 static inline int sysfs_create_link(struct kobject *kobj,
178 struct kobject *target, const char *name)
180 return 0;
183 static inline void sysfs_remove_link(struct kobject *kobj, const char *name)
187 static inline int sysfs_create_group(struct kobject *kobj,
188 const struct attribute_group *grp)
190 return 0;
193 static inline int sysfs_update_group(struct kobject *kobj,
194 const struct attribute_group *grp)
196 return 0;
199 static inline void sysfs_remove_group(struct kobject *kobj,
200 const struct attribute_group *grp)
204 static inline int sysfs_add_file_to_group(struct kobject *kobj,
205 const struct attribute *attr, const char *group)
207 return 0;
210 static inline void sysfs_remove_file_from_group(struct kobject *kobj,
211 const struct attribute *attr, const char *group)
215 static inline void sysfs_notify(struct kobject *kobj, char *dir, char *attr)
219 static inline int __must_check sysfs_init(void)
221 return 0;
224 #endif /* CONFIG_SYSFS */
226 #endif /* _SYSFS_H_ */