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.
27 struct module * owner;
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);
77 #define SYSFS_TYPE_MASK 0x00ff
78 #define SYSFS_ROOT 0x0001
79 #define SYSFS_DIR 0x0002
80 #define SYSFS_KOBJ_ATTR 0x0004
81 #define SYSFS_KOBJ_BIN_ATTR 0x0008
82 #define SYSFS_KOBJ_LINK 0x0020
83 #define SYSFS_COPY_NAME (SYSFS_DIR | SYSFS_KOBJ_LINK)
85 #define SYSFS_FLAG_MASK ~SYSFS_TYPE_MASK
86 #define SYSFS_FLAG_REMOVED 0x0100
90 extern int sysfs_schedule_callback(struct kobject *kobj,
91 void (*func)(void *), void *data, struct module *owner);
93 extern int __must_check
94 sysfs_create_dir(struct kobject *);
97 sysfs_remove_dir(struct kobject *);
99 extern int __must_check
100 sysfs_rename_dir(struct kobject *kobj, const char *new_name);
102 extern int __must_check
103 sysfs_move_dir(struct kobject *, struct kobject *);
105 extern int __must_check
106 sysfs_create_file(struct kobject *, const struct attribute *);
108 extern int __must_check
109 sysfs_update_file(struct kobject *, const struct attribute *);
111 extern int __must_check
112 sysfs_chmod_file(struct kobject *kobj, struct attribute *attr, mode_t mode);
115 sysfs_remove_file(struct kobject *, const struct attribute *);
117 extern int __must_check
118 sysfs_create_link(struct kobject * kobj, struct kobject * target, const char * name);
121 sysfs_remove_link(struct kobject *, const char * name);
123 int __must_check sysfs_create_bin_file(struct kobject *kobj,
124 struct bin_attribute *attr);
125 void sysfs_remove_bin_file(struct kobject *kobj, struct bin_attribute *attr);
127 int __must_check sysfs_create_group(struct kobject *,
128 const struct attribute_group *);
129 void sysfs_remove_group(struct kobject *, const struct attribute_group *);
130 int sysfs_add_file_to_group(struct kobject *kobj,
131 const struct attribute *attr, const char *group);
132 void sysfs_remove_file_from_group(struct kobject *kobj,
133 const struct attribute *attr, const char *group);
135 void sysfs_notify(struct kobject * k, char *dir, char *attr);
137 extern int __must_check sysfs_init(void);
139 #else /* CONFIG_SYSFS */
141 static inline int sysfs_schedule_callback(struct kobject *kobj,
142 void (*func)(void *), void *data, struct module *owner)
147 static inline int sysfs_create_dir(struct kobject * kobj)
152 static inline void sysfs_remove_dir(struct kobject * k)
157 static inline int sysfs_rename_dir(struct kobject * kobj, const char *new_name)
162 static inline int sysfs_move_dir(struct kobject * k, struct kobject * new_parent)
167 static inline int sysfs_create_file(struct kobject * k, const struct attribute * a)
172 static inline int sysfs_update_file(struct kobject * k, const struct attribute * a)
176 static inline int sysfs_chmod_file(struct kobject *kobj, struct attribute *attr, mode_t mode)
181 static inline void sysfs_remove_file(struct kobject * k, const struct attribute * a)
186 static inline int sysfs_create_link(struct kobject * k, struct kobject * t, const char * n)
191 static inline void sysfs_remove_link(struct kobject * k, const char * name)
197 static inline int sysfs_create_bin_file(struct kobject * k, struct bin_attribute * a)
202 static inline int sysfs_remove_bin_file(struct kobject * k, struct bin_attribute * a)
207 static inline int sysfs_create_group(struct kobject * k, const struct attribute_group *g)
212 static inline void sysfs_remove_group(struct kobject * k, const struct attribute_group * g)
217 static inline int sysfs_add_file_to_group(struct kobject *kobj,
218 const struct attribute *attr, const char *group)
223 static inline void sysfs_remove_file_from_group(struct kobject *kobj,
224 const struct attribute *attr, const char *group)
228 static inline void sysfs_notify(struct kobject * k, char *dir, char *attr)
232 static inline int __must_check sysfs_init(void)
237 #endif /* CONFIG_SYSFS */
239 #endif /* _SYSFS_H_ */