2 * sysfs.h - definitions for the device driver filesystem
4 * Copyright (c) 2001,2002 Patrick Mochel
5 * Copyright (c) 2004 Silicon Graphics, Inc.
7 * Please see Documentation/filesystems/sysfs.txt for more information.
13 #include <linux/compiler.h>
14 #include <linux/list.h>
15 #include <asm/atomic.h>
24 struct module * owner;
28 struct attribute_group {
30 struct attribute ** attrs;
36 * Use these macros to make defining attributes easier. See include/linux/device.h
40 #define __ATTR(_name,_mode,_show,_store) { \
41 .attr = {.name = __stringify(_name), .mode = _mode, .owner = THIS_MODULE }, \
46 #define __ATTR_RO(_name) { \
47 .attr = { .name = __stringify(_name), .mode = 0444, .owner = THIS_MODULE }, \
48 .show = _name##_show, \
51 #define __ATTR_NULL { .attr = { .name = NULL } }
53 #define attr_name(_attr) (_attr).attr.name
55 struct vm_area_struct;
57 struct bin_attribute {
58 struct attribute attr;
61 ssize_t (*read)(struct kobject *, char *, loff_t, size_t);
62 ssize_t (*write)(struct kobject *, char *, loff_t, size_t);
63 int (*mmap)(struct kobject *, struct bin_attribute *attr,
64 struct vm_area_struct *vma);
68 ssize_t (*show)(struct kobject *, struct attribute *,char *);
69 ssize_t (*store)(struct kobject *,struct attribute *,const char *, size_t);
72 #define SYSFS_ROOT 0x0001
73 #define SYSFS_DIR 0x0002
74 #define SYSFS_KOBJ_ATTR 0x0004
75 #define SYSFS_KOBJ_BIN_ATTR 0x0008
76 #define SYSFS_KOBJ_LINK 0x0020
77 #define SYSFS_NOT_PINNED (SYSFS_KOBJ_ATTR | SYSFS_KOBJ_BIN_ATTR | SYSFS_KOBJ_LINK)
81 extern int sysfs_schedule_callback(struct kobject *kobj,
82 void (*func)(void *), void *data);
84 extern int __must_check
85 sysfs_create_dir(struct kobject *, struct dentry *);
88 sysfs_remove_dir(struct kobject *);
90 extern int __must_check
91 sysfs_rename_dir(struct kobject *, struct dentry *, const char *new_name);
93 extern int __must_check
94 sysfs_move_dir(struct kobject *, struct kobject *);
96 extern int __must_check
97 sysfs_create_file(struct kobject *, const struct attribute *);
99 extern int __must_check
100 sysfs_update_file(struct kobject *, const struct attribute *);
102 extern int __must_check
103 sysfs_chmod_file(struct kobject *kobj, struct attribute *attr, mode_t mode);
106 sysfs_remove_file(struct kobject *, const struct attribute *);
108 extern int __must_check
109 sysfs_create_link(struct kobject * kobj, struct kobject * target, const char * name);
112 sysfs_remove_link(struct kobject *, const char * name);
114 int __must_check sysfs_create_bin_file(struct kobject *kobj,
115 struct bin_attribute *attr);
116 void sysfs_remove_bin_file(struct kobject *kobj, struct bin_attribute *attr);
118 int __must_check sysfs_create_group(struct kobject *,
119 const struct attribute_group *);
120 void sysfs_remove_group(struct kobject *, const struct attribute_group *);
121 int sysfs_add_file_to_group(struct kobject *kobj,
122 const struct attribute *attr, const char *group);
123 void sysfs_remove_file_from_group(struct kobject *kobj,
124 const struct attribute *attr, const char *group);
126 void sysfs_notify(struct kobject * k, char *dir, char *attr);
129 extern int sysfs_make_shadowed_dir(struct kobject *kobj,
130 void * (*follow_link)(struct dentry *, struct nameidata *));
131 extern struct dentry *sysfs_create_shadow_dir(struct kobject *kobj);
132 extern void sysfs_remove_shadow_dir(struct dentry *dir);
134 extern int __must_check sysfs_init(void);
136 #else /* CONFIG_SYSFS */
138 static inline int sysfs_schedule_callback(struct kobject *kobj,
139 void (*func)(void *), void *data)
144 static inline int sysfs_create_dir(struct kobject * k, struct dentry *shadow)
149 static inline void sysfs_remove_dir(struct kobject * k)
154 static inline int sysfs_rename_dir(struct kobject * k,
155 struct dentry *new_parent,
156 const char *new_name)
161 static inline int sysfs_move_dir(struct kobject * k, struct kobject * new_parent)
166 static inline int sysfs_create_file(struct kobject * k, const struct attribute * a)
171 static inline int sysfs_update_file(struct kobject * k, const struct attribute * a)
175 static inline int sysfs_chmod_file(struct kobject *kobj, struct attribute *attr, mode_t mode)
180 static inline void sysfs_remove_file(struct kobject * k, const struct attribute * a)
185 static inline int sysfs_create_link(struct kobject * k, struct kobject * t, const char * n)
190 static inline void sysfs_remove_link(struct kobject * k, const char * name)
196 static inline int sysfs_create_bin_file(struct kobject * k, struct bin_attribute * a)
201 static inline int sysfs_remove_bin_file(struct kobject * k, struct bin_attribute * a)
206 static inline int sysfs_create_group(struct kobject * k, const struct attribute_group *g)
211 static inline void sysfs_remove_group(struct kobject * k, const struct attribute_group * g)
216 static inline int sysfs_add_file_to_group(struct kobject *kobj,
217 const struct attribute *attr, const char *group)
222 static inline void sysfs_remove_file_from_group(struct kobject *kobj,
223 const struct attribute *attr, const char *group)
227 static inline void sysfs_notify(struct kobject * k, char *dir, char *attr)
231 static inline int sysfs_make_shadowed_dir(struct kobject *kobj,
232 void * (*follow_link)(struct dentry *, struct nameidata *))
237 static inline int __must_check sysfs_init(void)
242 #endif /* CONFIG_SYSFS */
244 #endif /* _SYSFS_H_ */