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.
15 #include <linux/compiler.h>
16 #include <linux/errno.h>
17 #include <linux/list.h>
18 #include <asm/atomic.h>
24 * The *owner field is no longer used, but leave around
25 * until the tree gets cleaned up fully.
33 struct attribute_group {
35 mode_t (*is_visible)(struct kobject *,
36 struct attribute *, int);
37 struct attribute **attrs;
43 * Use these macros to make defining attributes easier. See include/linux/device.h
47 #define __ATTR(_name,_mode,_show,_store) { \
48 .attr = {.name = __stringify(_name), .mode = _mode }, \
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;
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);
77 ssize_t (*show)(struct kobject *, struct attribute *,char *);
78 ssize_t (*store)(struct kobject *,struct attribute *,const char *, size_t);
85 int sysfs_schedule_callback(struct kobject *kobj, void (*func)(void *),
86 void *data, struct module *owner);
88 int __must_check sysfs_create_dir(struct kobject *kobj);
89 void sysfs_remove_dir(struct kobject *kobj);
90 int __must_check sysfs_rename_dir(struct kobject *kobj, const char *new_name);
91 int __must_check sysfs_move_dir(struct kobject *kobj,
92 struct kobject *new_parent_kobj);
94 int __must_check sysfs_create_file(struct kobject *kobj,
95 const struct attribute *attr);
96 int __must_check sysfs_chmod_file(struct kobject *kobj, struct attribute *attr,
98 void sysfs_remove_file(struct kobject *kobj, const struct attribute *attr);
100 int __must_check sysfs_create_bin_file(struct kobject *kobj,
101 struct bin_attribute *attr);
102 void sysfs_remove_bin_file(struct kobject *kobj, struct bin_attribute *attr);
104 int __must_check sysfs_create_link(struct kobject *kobj, struct kobject *target,
106 int __must_check sysfs_create_link_nowarn(struct kobject *kobj,
107 struct kobject *target,
109 void sysfs_remove_link(struct kobject *kobj, const char *name);
111 int __must_check sysfs_create_group(struct kobject *kobj,
112 const struct attribute_group *grp);
113 int sysfs_update_group(struct kobject *kobj,
114 const struct attribute_group *grp);
115 void sysfs_remove_group(struct kobject *kobj,
116 const struct attribute_group *grp);
117 int sysfs_add_file_to_group(struct kobject *kobj,
118 const struct attribute *attr, const char *group);
119 void sysfs_remove_file_from_group(struct kobject *kobj,
120 const struct attribute *attr, const char *group);
122 void sysfs_notify(struct kobject *kobj, const char *dir, const char *attr);
123 void sysfs_notify_dirent(struct sysfs_dirent *sd);
124 struct sysfs_dirent *sysfs_get_dirent(struct sysfs_dirent *parent_sd,
125 const unsigned char *name);
126 struct sysfs_dirent *sysfs_get(struct sysfs_dirent *sd);
127 void sysfs_put(struct sysfs_dirent *sd);
128 void sysfs_printk_last_file(void);
129 int __must_check sysfs_init(void);
131 #else /* CONFIG_SYSFS */
133 static inline int sysfs_schedule_callback(struct kobject *kobj,
134 void (*func)(void *), void *data, struct module *owner)
139 static inline int sysfs_create_dir(struct kobject *kobj)
144 static inline void sysfs_remove_dir(struct kobject *kobj)
148 static inline int sysfs_rename_dir(struct kobject *kobj, const char *new_name)
153 static inline int sysfs_move_dir(struct kobject *kobj,
154 struct kobject *new_parent_kobj)
159 static inline int sysfs_create_file(struct kobject *kobj,
160 const struct attribute *attr)
165 static inline int sysfs_chmod_file(struct kobject *kobj,
166 struct attribute *attr, mode_t mode)
171 static inline void sysfs_remove_file(struct kobject *kobj,
172 const struct attribute *attr)
176 static inline int sysfs_create_bin_file(struct kobject *kobj,
177 struct bin_attribute *attr)
182 static inline void sysfs_remove_bin_file(struct kobject *kobj,
183 struct bin_attribute *attr)
187 static inline int sysfs_create_link(struct kobject *kobj,
188 struct kobject *target, const char *name)
193 static inline int sysfs_create_link_nowarn(struct kobject *kobj,
194 struct kobject *target,
200 static inline void sysfs_remove_link(struct kobject *kobj, const char *name)
204 static inline int sysfs_create_group(struct kobject *kobj,
205 const struct attribute_group *grp)
210 static inline int sysfs_update_group(struct kobject *kobj,
211 const struct attribute_group *grp)
216 static inline void sysfs_remove_group(struct kobject *kobj,
217 const struct attribute_group *grp)
221 static inline int sysfs_add_file_to_group(struct kobject *kobj,
222 const struct attribute *attr, const char *group)
227 static inline void sysfs_remove_file_from_group(struct kobject *kobj,
228 const struct attribute *attr, const char *group)
232 static inline void sysfs_notify(struct kobject *kobj, const char *dir,
236 static inline void sysfs_notify_dirent(struct sysfs_dirent *sd)
240 struct sysfs_dirent *sysfs_get_dirent(struct sysfs_dirent *parent_sd,
241 const unsigned char *name)
245 static inline struct sysfs_dirent *sysfs_get(struct sysfs_dirent *sd)
249 static inline void sysfs_put(struct sysfs_dirent *sd)
253 static inline int __must_check sysfs_init(void)
258 static inline void sysfs_printk_last_file(void)
262 #endif /* CONFIG_SYSFS */
264 #endif /* _SYSFS_H_ */