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>
24 * The *owner field is no longer used, but leave around
25 * until the tree gets cleaned up fully.
29 struct module * owner;
33 struct attribute_group {
35 struct attribute ** attrs;
41 * Use these macros to make defining attributes easier. See include/linux/device.h
45 #define __ATTR(_name,_mode,_show,_store) { \
46 .attr = {.name = __stringify(_name), .mode = _mode }, \
51 #define __ATTR_RO(_name) { \
52 .attr = { .name = __stringify(_name), .mode = 0444 }, \
53 .show = _name##_show, \
56 #define __ATTR_NULL { .attr = { .name = NULL } }
58 #define attr_name(_attr) (_attr).attr.name
60 struct vm_area_struct;
62 struct bin_attribute {
63 struct attribute attr;
66 ssize_t (*read)(struct kobject *, char *, loff_t, size_t);
67 ssize_t (*write)(struct kobject *, 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);
77 #define SYSFS_ROOT 0x0001
78 #define SYSFS_DIR 0x0002
79 #define SYSFS_KOBJ_ATTR 0x0004
80 #define SYSFS_KOBJ_BIN_ATTR 0x0008
81 #define SYSFS_KOBJ_LINK 0x0020
82 #define SYSFS_NOT_PINNED (SYSFS_KOBJ_ATTR | SYSFS_KOBJ_BIN_ATTR | SYSFS_KOBJ_LINK)
83 #define SYSFS_COPY_NAME (SYSFS_DIR | SYSFS_KOBJ_LINK)
87 extern int sysfs_schedule_callback(struct kobject *kobj,
88 void (*func)(void *), void *data, struct module *owner);
90 extern int __must_check
91 sysfs_create_dir(struct kobject *, struct dentry *);
94 sysfs_remove_dir(struct kobject *);
96 extern int __must_check
97 sysfs_rename_dir(struct kobject *, struct dentry *, const char *new_name);
99 extern int __must_check
100 sysfs_move_dir(struct kobject *, struct kobject *);
102 extern int __must_check
103 sysfs_create_file(struct kobject *, const struct attribute *);
105 extern int __must_check
106 sysfs_update_file(struct kobject *, const struct attribute *);
108 extern int __must_check
109 sysfs_chmod_file(struct kobject *kobj, struct attribute *attr, mode_t mode);
112 sysfs_remove_file(struct kobject *, const struct attribute *);
114 extern int __must_check
115 sysfs_create_link(struct kobject * kobj, struct kobject * target, const char * name);
118 sysfs_remove_link(struct kobject *, const char * name);
120 int __must_check sysfs_create_bin_file(struct kobject *kobj,
121 struct bin_attribute *attr);
122 void sysfs_remove_bin_file(struct kobject *kobj, struct bin_attribute *attr);
124 int __must_check sysfs_create_group(struct kobject *,
125 const struct attribute_group *);
126 void sysfs_remove_group(struct kobject *, const struct attribute_group *);
127 int sysfs_add_file_to_group(struct kobject *kobj,
128 const struct attribute *attr, const char *group);
129 void sysfs_remove_file_from_group(struct kobject *kobj,
130 const struct attribute *attr, const char *group);
132 void sysfs_notify(struct kobject * k, char *dir, char *attr);
135 extern int sysfs_make_shadowed_dir(struct kobject *kobj,
136 void * (*follow_link)(struct dentry *, struct nameidata *));
137 extern struct dentry *sysfs_create_shadow_dir(struct kobject *kobj);
138 extern void sysfs_remove_shadow_dir(struct dentry *dir);
140 extern int __must_check sysfs_init(void);
142 #else /* CONFIG_SYSFS */
144 static inline int sysfs_schedule_callback(struct kobject *kobj,
145 void (*func)(void *), void *data, struct module *owner)
150 static inline int sysfs_create_dir(struct kobject * k, struct dentry *shadow)
155 static inline void sysfs_remove_dir(struct kobject * k)
160 static inline int sysfs_rename_dir(struct kobject * k,
161 struct dentry *new_parent,
162 const char *new_name)
167 static inline int sysfs_move_dir(struct kobject * k, struct kobject * new_parent)
172 static inline int sysfs_create_file(struct kobject * k, const struct attribute * a)
177 static inline int sysfs_update_file(struct kobject * k, const struct attribute * a)
181 static inline int sysfs_chmod_file(struct kobject *kobj, struct attribute *attr, mode_t mode)
186 static inline void sysfs_remove_file(struct kobject * k, const struct attribute * a)
191 static inline int sysfs_create_link(struct kobject * k, struct kobject * t, const char * n)
196 static inline void sysfs_remove_link(struct kobject * k, const char * name)
202 static inline int sysfs_create_bin_file(struct kobject * k, struct bin_attribute * a)
207 static inline int sysfs_remove_bin_file(struct kobject * k, struct bin_attribute * a)
212 static inline int sysfs_create_group(struct kobject * k, const struct attribute_group *g)
217 static inline void sysfs_remove_group(struct kobject * k, const struct attribute_group * g)
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 * k, char *dir, char *attr)
237 static inline int sysfs_make_shadowed_dir(struct kobject *kobj,
238 void * (*follow_link)(struct dentry *, struct nameidata *))
243 static inline int __must_check sysfs_init(void)
248 #endif /* CONFIG_SYSFS */
250 #endif /* _SYSFS_H_ */