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.
25 * x86 tree has been cleaned up. The owner
26 * attribute is still left for other arches.
34 struct attribute_group {
36 mode_t (*is_visible)(struct kobject *,
37 struct attribute *, int);
38 struct attribute **attrs;
44 * Use these macros to make defining attributes easier. See include/linux/device.h
48 #define __ATTR(_name,_mode,_show,_store) { \
49 .attr = {.name = __stringify(_name), .mode = _mode }, \
54 #define __ATTR_RO(_name) { \
55 .attr = { .name = __stringify(_name), .mode = 0444 }, \
56 .show = _name##_show, \
59 #define __ATTR_NULL { .attr = { .name = NULL } }
61 #define attr_name(_attr) (_attr).attr.name
63 struct vm_area_struct;
65 struct bin_attribute {
66 struct attribute attr;
69 ssize_t (*read)(struct kobject *, struct bin_attribute *,
70 char *, loff_t, size_t);
71 ssize_t (*write)(struct kobject *, struct bin_attribute *,
72 char *, loff_t, size_t);
73 int (*mmap)(struct kobject *, struct bin_attribute *attr,
74 struct vm_area_struct *vma);
78 ssize_t (*show)(struct kobject *, struct attribute *,char *);
79 ssize_t (*store)(struct kobject *,struct attribute *,const char *, size_t);
86 int sysfs_schedule_callback(struct kobject *kobj, void (*func)(void *),
87 void *data, struct module *owner);
89 int __must_check sysfs_create_dir(struct kobject *kobj);
90 void sysfs_remove_dir(struct kobject *kobj);
91 int __must_check sysfs_rename_dir(struct kobject *kobj, const char *new_name);
92 int __must_check sysfs_move_dir(struct kobject *kobj,
93 struct kobject *new_parent_kobj);
95 int __must_check sysfs_create_file(struct kobject *kobj,
96 const struct attribute *attr);
97 int __must_check sysfs_chmod_file(struct kobject *kobj, struct attribute *attr,
99 void sysfs_remove_file(struct kobject *kobj, const struct attribute *attr);
101 int __must_check sysfs_create_bin_file(struct kobject *kobj,
102 struct bin_attribute *attr);
103 void sysfs_remove_bin_file(struct kobject *kobj, struct bin_attribute *attr);
105 int __must_check sysfs_create_link(struct kobject *kobj, struct kobject *target,
107 int __must_check sysfs_create_link_nowarn(struct kobject *kobj,
108 struct kobject *target,
110 void sysfs_remove_link(struct kobject *kobj, const char *name);
112 int __must_check sysfs_create_group(struct kobject *kobj,
113 const struct attribute_group *grp);
114 int sysfs_update_group(struct kobject *kobj,
115 const struct attribute_group *grp);
116 void sysfs_remove_group(struct kobject *kobj,
117 const struct attribute_group *grp);
118 int sysfs_add_file_to_group(struct kobject *kobj,
119 const struct attribute *attr, const char *group);
120 void sysfs_remove_file_from_group(struct kobject *kobj,
121 const struct attribute *attr, const char *group);
123 void sysfs_notify(struct kobject *kobj, const char *dir, const char *attr);
124 void sysfs_notify_dirent(struct sysfs_dirent *sd);
125 struct sysfs_dirent *sysfs_get_dirent(struct sysfs_dirent *parent_sd,
126 const unsigned char *name);
127 struct sysfs_dirent *sysfs_get(struct sysfs_dirent *sd);
128 void sysfs_put(struct sysfs_dirent *sd);
129 void sysfs_printk_last_file(void);
130 int __must_check sysfs_init(void);
132 #else /* CONFIG_SYSFS */
134 static inline int sysfs_schedule_callback(struct kobject *kobj,
135 void (*func)(void *), void *data, struct module *owner)
140 static inline int sysfs_create_dir(struct kobject *kobj)
145 static inline void sysfs_remove_dir(struct kobject *kobj)
149 static inline int sysfs_rename_dir(struct kobject *kobj, const char *new_name)
154 static inline int sysfs_move_dir(struct kobject *kobj,
155 struct kobject *new_parent_kobj)
160 static inline int sysfs_create_file(struct kobject *kobj,
161 const struct attribute *attr)
166 static inline int sysfs_chmod_file(struct kobject *kobj,
167 struct attribute *attr, mode_t mode)
172 static inline void sysfs_remove_file(struct kobject *kobj,
173 const struct attribute *attr)
177 static inline int sysfs_create_bin_file(struct kobject *kobj,
178 struct bin_attribute *attr)
183 static inline void sysfs_remove_bin_file(struct kobject *kobj,
184 struct bin_attribute *attr)
188 static inline int sysfs_create_link(struct kobject *kobj,
189 struct kobject *target, const char *name)
194 static inline int sysfs_create_link_nowarn(struct kobject *kobj,
195 struct kobject *target,
201 static inline void sysfs_remove_link(struct kobject *kobj, const char *name)
205 static inline int sysfs_create_group(struct kobject *kobj,
206 const struct attribute_group *grp)
211 static inline int sysfs_update_group(struct kobject *kobj,
212 const struct attribute_group *grp)
217 static inline void sysfs_remove_group(struct kobject *kobj,
218 const struct attribute_group *grp)
222 static inline int sysfs_add_file_to_group(struct kobject *kobj,
223 const struct attribute *attr, const char *group)
228 static inline void sysfs_remove_file_from_group(struct kobject *kobj,
229 const struct attribute *attr, const char *group)
233 static inline void sysfs_notify(struct kobject *kobj, const char *dir,
237 static inline void sysfs_notify_dirent(struct sysfs_dirent *sd)
241 struct sysfs_dirent *sysfs_get_dirent(struct sysfs_dirent *parent_sd,
242 const unsigned char *name)
246 static inline struct sysfs_dirent *sysfs_get(struct sysfs_dirent *sd)
250 static inline void sysfs_put(struct sysfs_dirent *sd)
254 static inline int __must_check sysfs_init(void)
259 static inline void sysfs_printk_last_file(void)
263 #endif /* CONFIG_SYSFS */
265 #endif /* _SYSFS_H_ */