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)
79 #define SYSFS_COPY_NAME (SYSFS_DIR | SYSFS_KOBJ_LINK)
83 extern int sysfs_schedule_callback(struct kobject *kobj,
84 void (*func)(void *), void *data, struct module *owner);
86 extern int __must_check
87 sysfs_create_dir(struct kobject *, struct dentry *);
90 sysfs_remove_dir(struct kobject *);
92 extern int __must_check
93 sysfs_rename_dir(struct kobject *, struct dentry *, const char *new_name);
95 extern int __must_check
96 sysfs_move_dir(struct kobject *, struct kobject *);
98 extern int __must_check
99 sysfs_create_file(struct kobject *, const struct attribute *);
101 extern int __must_check
102 sysfs_update_file(struct kobject *, const struct attribute *);
104 extern int __must_check
105 sysfs_chmod_file(struct kobject *kobj, struct attribute *attr, mode_t mode);
108 sysfs_remove_file(struct kobject *, const struct attribute *);
110 extern int __must_check
111 sysfs_create_link(struct kobject * kobj, struct kobject * target, const char * name);
114 sysfs_remove_link(struct kobject *, const char * name);
116 int __must_check sysfs_create_bin_file(struct kobject *kobj,
117 struct bin_attribute *attr);
118 void sysfs_remove_bin_file(struct kobject *kobj, struct bin_attribute *attr);
120 int __must_check sysfs_create_group(struct kobject *,
121 const struct attribute_group *);
122 void sysfs_remove_group(struct kobject *, const struct attribute_group *);
123 int sysfs_add_file_to_group(struct kobject *kobj,
124 const struct attribute *attr, const char *group);
125 void sysfs_remove_file_from_group(struct kobject *kobj,
126 const struct attribute *attr, const char *group);
128 void sysfs_notify(struct kobject * k, char *dir, char *attr);
131 extern int sysfs_make_shadowed_dir(struct kobject *kobj,
132 void * (*follow_link)(struct dentry *, struct nameidata *));
133 extern struct dentry *sysfs_create_shadow_dir(struct kobject *kobj);
134 extern void sysfs_remove_shadow_dir(struct dentry *dir);
136 extern int __must_check sysfs_init(void);
138 #else /* CONFIG_SYSFS */
140 static inline int sysfs_schedule_callback(struct kobject *kobj,
141 void (*func)(void *), void *data, struct module *owner)
146 static inline int sysfs_create_dir(struct kobject * k, struct dentry *shadow)
151 static inline void sysfs_remove_dir(struct kobject * k)
156 static inline int sysfs_rename_dir(struct kobject * k,
157 struct dentry *new_parent,
158 const char *new_name)
163 static inline int sysfs_move_dir(struct kobject * k, struct kobject * new_parent)
168 static inline int sysfs_create_file(struct kobject * k, const struct attribute * a)
173 static inline int sysfs_update_file(struct kobject * k, const struct attribute * a)
177 static inline int sysfs_chmod_file(struct kobject *kobj, struct attribute *attr, mode_t mode)
182 static inline void sysfs_remove_file(struct kobject * k, const struct attribute * a)
187 static inline int sysfs_create_link(struct kobject * k, struct kobject * t, const char * n)
192 static inline void sysfs_remove_link(struct kobject * k, const char * name)
198 static inline int sysfs_create_bin_file(struct kobject * k, struct bin_attribute * a)
203 static inline int sysfs_remove_bin_file(struct kobject * k, struct bin_attribute * a)
208 static inline int sysfs_create_group(struct kobject * k, const struct attribute_group *g)
213 static inline void sysfs_remove_group(struct kobject * k, const struct attribute_group * g)
218 static inline int sysfs_add_file_to_group(struct kobject *kobj,
219 const struct attribute *attr, const char *group)
224 static inline void sysfs_remove_file_from_group(struct kobject *kobj,
225 const struct attribute *attr, const char *group)
229 static inline void sysfs_notify(struct kobject * k, char *dir, char *attr)
233 static inline int sysfs_make_shadowed_dir(struct kobject *kobj,
234 void * (*follow_link)(struct dentry *, struct nameidata *))
239 static inline int __must_check sysfs_init(void)
244 #endif /* CONFIG_SYSFS */
246 #endif /* _SYSFS_H_ */