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>
22 * The *owner field is no longer used, but leave around
23 * until the tree gets cleaned up fully.
31 struct attribute_group {
33 struct attribute **attrs;
39 * Use these macros to make defining attributes easier. See include/linux/device.h
43 #define __ATTR(_name,_mode,_show,_store) { \
44 .attr = {.name = __stringify(_name), .mode = _mode }, \
49 #define __ATTR_RO(_name) { \
50 .attr = { .name = __stringify(_name), .mode = 0444 }, \
51 .show = _name##_show, \
54 #define __ATTR_NULL { .attr = { .name = NULL } }
56 #define attr_name(_attr) (_attr).attr.name
58 struct vm_area_struct;
60 struct bin_attribute {
61 struct attribute attr;
64 ssize_t (*read)(struct kobject *, struct bin_attribute *,
65 char *, loff_t, size_t);
66 ssize_t (*write)(struct kobject *, struct bin_attribute *,
67 char *, loff_t, size_t);
68 int (*mmap)(struct kobject *, struct bin_attribute *attr,
69 struct vm_area_struct *vma);
73 ssize_t (*show)(struct kobject *, struct attribute *,char *);
74 ssize_t (*store)(struct kobject *,struct attribute *,const char *, size_t);
79 int sysfs_schedule_callback(struct kobject *kobj, void (*func)(void *),
80 void *data, struct module *owner);
82 int __must_check sysfs_create_dir(struct kobject *kobj);
83 void sysfs_remove_dir(struct kobject *kobj);
84 int __must_check sysfs_rename_dir(struct kobject *kobj, const char *new_name);
85 int __must_check sysfs_move_dir(struct kobject *kobj,
86 struct kobject *new_parent_kobj);
88 int __must_check sysfs_create_file(struct kobject *kobj,
89 const struct attribute *attr);
90 int __must_check sysfs_update_file(struct kobject *kobj,
91 const struct attribute *attr);
92 int __must_check sysfs_chmod_file(struct kobject *kobj, struct attribute *attr,
94 void sysfs_remove_file(struct kobject *kobj, const struct attribute *attr);
96 int __must_check sysfs_create_bin_file(struct kobject *kobj,
97 struct bin_attribute *attr);
98 void sysfs_remove_bin_file(struct kobject *kobj, struct bin_attribute *attr);
100 int __must_check sysfs_create_link(struct kobject *kobj, struct kobject *target,
102 void sysfs_remove_link(struct kobject *kobj, const char *name);
104 int __must_check sysfs_create_group(struct kobject *kobj,
105 const struct attribute_group *grp);
106 void sysfs_remove_group(struct kobject *kobj,
107 const struct attribute_group *grp);
108 int sysfs_add_file_to_group(struct kobject *kobj,
109 const struct attribute *attr, const char *group);
110 void sysfs_remove_file_from_group(struct kobject *kobj,
111 const struct attribute *attr, const char *group);
113 void sysfs_notify(struct kobject *kobj, char *dir, char *attr);
115 extern int __must_check sysfs_init(void);
117 #else /* CONFIG_SYSFS */
119 static inline int sysfs_schedule_callback(struct kobject *kobj,
120 void (*func)(void *), void *data, struct module *owner)
125 static inline int sysfs_create_dir(struct kobject *kobj)
130 static inline void sysfs_remove_dir(struct kobject *kobj)
135 static inline int sysfs_rename_dir(struct kobject *kobj, const char *new_name)
140 static inline int sysfs_move_dir(struct kobject *kobj,
141 struct kobject *new_parent_kobj)
146 static inline int sysfs_create_file(struct kobject *kobj,
147 const struct attribute *attr)
152 static inline int sysfs_update_file(struct kobject *kobj,
153 const struct attribute *attr)
157 static inline int sysfs_chmod_file(struct kobject *kobj,
158 struct attribute *attr, mode_t mode)
163 static inline void sysfs_remove_file(struct kobject *kobj,
164 const struct attribute *attr)
169 static inline int sysfs_create_bin_file(struct kobject *kobj,
170 struct bin_attribute *attr)
175 static inline int sysfs_remove_bin_file(struct kobject *kobj,
176 struct bin_attribute *attr)
181 static inline int sysfs_create_link(struct kobject *kobj,
182 struct kobject *target, const char *name)
187 static inline void sysfs_remove_link(struct kobject *kobj, const char *name)
192 static inline int sysfs_create_group(struct kobject *kobj,
193 const struct attribute_group *grp)
198 static inline void sysfs_remove_group(struct kobject *kobj,
199 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)
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)
224 #endif /* CONFIG_SYSFS */
226 #endif /* _SYSFS_H_ */