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/errno.h>
15 #include <linux/list.h>
16 #include <asm/atomic.h>
25 struct module * owner;
29 struct attribute_group {
31 struct attribute ** attrs;
37 * Use these macros to make defining attributes easier. See include/linux/device.h
41 #define __ATTR(_name,_mode,_show,_store) { \
42 .attr = {.name = __stringify(_name), .mode = _mode, .owner = THIS_MODULE }, \
47 #define __ATTR_RO(_name) { \
48 .attr = { .name = __stringify(_name), .mode = 0444, .owner = THIS_MODULE }, \
49 .show = _name##_show, \
52 #define __ATTR_NULL { .attr = { .name = NULL } }
54 #define attr_name(_attr) (_attr).attr.name
56 struct vm_area_struct;
58 struct bin_attribute {
59 struct attribute attr;
62 ssize_t (*read)(struct kobject *, char *, loff_t, size_t);
63 ssize_t (*write)(struct kobject *, char *, loff_t, size_t);
64 int (*mmap)(struct kobject *, struct bin_attribute *attr,
65 struct vm_area_struct *vma);
69 ssize_t (*show)(struct kobject *, struct attribute *,char *);
70 ssize_t (*store)(struct kobject *,struct attribute *,const char *, size_t);
73 #define SYSFS_ROOT 0x0001
74 #define SYSFS_DIR 0x0002
75 #define SYSFS_KOBJ_ATTR 0x0004
76 #define SYSFS_KOBJ_BIN_ATTR 0x0008
77 #define SYSFS_KOBJ_LINK 0x0020
78 #define SYSFS_NOT_PINNED (SYSFS_KOBJ_ATTR | SYSFS_KOBJ_BIN_ATTR | SYSFS_KOBJ_LINK)
82 extern int sysfs_schedule_callback(struct kobject *kobj,
83 void (*func)(void *), void *data, struct module *owner);
85 extern int __must_check
86 sysfs_create_dir(struct kobject *, struct dentry *);
89 sysfs_remove_dir(struct kobject *);
91 extern int __must_check
92 sysfs_rename_dir(struct kobject *, struct dentry *, const char *new_name);
94 extern int __must_check
95 sysfs_move_dir(struct kobject *, struct kobject *);
97 extern int __must_check
98 sysfs_create_file(struct kobject *, const struct attribute *);
100 extern int __must_check
101 sysfs_update_file(struct kobject *, const struct attribute *);
103 extern int __must_check
104 sysfs_chmod_file(struct kobject *kobj, struct attribute *attr, mode_t mode);
107 sysfs_remove_file(struct kobject *, const struct attribute *);
109 extern int __must_check
110 sysfs_create_link(struct kobject * kobj, struct kobject * target, const char * name);
113 sysfs_remove_link(struct kobject *, const char * name);
115 int __must_check sysfs_create_bin_file(struct kobject *kobj,
116 struct bin_attribute *attr);
117 void sysfs_remove_bin_file(struct kobject *kobj, struct bin_attribute *attr);
119 int __must_check sysfs_create_group(struct kobject *,
120 const struct attribute_group *);
121 void sysfs_remove_group(struct kobject *, const struct attribute_group *);
122 int sysfs_add_file_to_group(struct kobject *kobj,
123 const struct attribute *attr, const char *group);
124 void sysfs_remove_file_from_group(struct kobject *kobj,
125 const struct attribute *attr, const char *group);
127 void sysfs_notify(struct kobject * k, char *dir, char *attr);
130 extern int sysfs_make_shadowed_dir(struct kobject *kobj,
131 void * (*follow_link)(struct dentry *, struct nameidata *));
132 extern struct dentry *sysfs_create_shadow_dir(struct kobject *kobj);
133 extern void sysfs_remove_shadow_dir(struct dentry *dir);
135 extern int __must_check sysfs_init(void);
137 #else /* CONFIG_SYSFS */
139 static inline int sysfs_schedule_callback(struct kobject *kobj,
140 void (*func)(void *), void *data, struct module *owner)
145 static inline int sysfs_create_dir(struct kobject * k, struct dentry *shadow)
150 static inline void sysfs_remove_dir(struct kobject * k)
155 static inline int sysfs_rename_dir(struct kobject * k,
156 struct dentry *new_parent,
157 const char *new_name)
162 static inline int sysfs_move_dir(struct kobject * k, struct kobject * new_parent)
167 static inline int sysfs_create_file(struct kobject * k, const struct attribute * a)
172 static inline int sysfs_update_file(struct kobject * k, const struct attribute * a)
176 static inline int sysfs_chmod_file(struct kobject *kobj, struct attribute *attr, mode_t mode)
181 static inline void sysfs_remove_file(struct kobject * k, const struct attribute * a)
186 static inline int sysfs_create_link(struct kobject * k, struct kobject * t, const char * n)
191 static inline void sysfs_remove_link(struct kobject * k, const char * name)
197 static inline int sysfs_create_bin_file(struct kobject * k, struct bin_attribute * a)
202 static inline int sysfs_remove_bin_file(struct kobject * k, struct bin_attribute * a)
207 static inline int sysfs_create_group(struct kobject * k, const struct attribute_group *g)
212 static inline void sysfs_remove_group(struct kobject * k, const struct attribute_group * g)
217 static inline int sysfs_add_file_to_group(struct kobject *kobj,
218 const struct attribute *attr, const char *group)
223 static inline void sysfs_remove_file_from_group(struct kobject *kobj,
224 const struct attribute *attr, const char *group)
228 static inline void sysfs_notify(struct kobject * k, char *dir, char *attr)
232 static inline int sysfs_make_shadowed_dir(struct kobject *kobj,
233 void * (*follow_link)(struct dentry *, struct nameidata *))
238 static inline int __must_check sysfs_init(void)
243 #endif /* CONFIG_SYSFS */
245 #endif /* _SYSFS_H_ */