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 <asm/atomic.h>
21 struct module * owner;
25 struct attribute_group {
27 struct attribute ** attrs;
33 * Use these macros to make defining attributes easier. See include/linux/device.h
37 #define __ATTR(_name,_mode,_show,_store) { \
38 .attr = {.name = __stringify(_name), .mode = _mode, .owner = THIS_MODULE }, \
43 #define __ATTR_RO(_name) { \
44 .attr = { .name = __stringify(_name), .mode = 0444, .owner = THIS_MODULE }, \
45 .show = _name##_show, \
48 #define __ATTR_NULL { .attr = { .name = NULL } }
50 #define attr_name(_attr) (_attr).attr.name
52 struct vm_area_struct;
54 struct bin_attribute {
55 struct attribute attr;
58 ssize_t (*read)(struct kobject *, char *, loff_t, size_t);
59 ssize_t (*write)(struct kobject *, char *, loff_t, size_t);
60 int (*mmap)(struct kobject *, struct bin_attribute *attr,
61 struct vm_area_struct *vma);
65 ssize_t (*show)(struct kobject *, struct attribute *,char *);
66 ssize_t (*store)(struct kobject *,struct attribute *,const char *, size_t);
71 struct list_head s_sibling;
72 struct list_head s_children;
76 struct dentry * s_dentry;
77 struct iattr * s_iattr;
81 #define SYSFS_ROOT 0x0001
82 #define SYSFS_DIR 0x0002
83 #define SYSFS_KOBJ_ATTR 0x0004
84 #define SYSFS_KOBJ_BIN_ATTR 0x0008
85 #define SYSFS_KOBJ_LINK 0x0020
86 #define SYSFS_NOT_PINNED (SYSFS_KOBJ_ATTR | SYSFS_KOBJ_BIN_ATTR | SYSFS_KOBJ_LINK)
90 extern int __must_check
91 sysfs_create_dir(struct kobject *);
94 sysfs_remove_dir(struct kobject *);
96 extern int __must_check
97 sysfs_rename_dir(struct kobject *, const char *new_name);
99 extern int __must_check
100 sysfs_create_file(struct kobject *, const struct attribute *);
102 extern int __must_check
103 sysfs_update_file(struct kobject *, const struct attribute *);
105 extern int __must_check
106 sysfs_chmod_file(struct kobject *kobj, struct attribute *attr, mode_t mode);
109 sysfs_remove_file(struct kobject *, const struct attribute *);
111 extern int __must_check
112 sysfs_create_link(struct kobject * kobj, struct kobject * target, const char * name);
115 sysfs_remove_link(struct kobject *, const char * name);
117 int __must_check sysfs_create_bin_file(struct kobject *kobj,
118 struct bin_attribute *attr);
119 void sysfs_remove_bin_file(struct kobject *kobj, struct bin_attribute *attr);
121 int __must_check sysfs_create_group(struct kobject *,
122 const struct attribute_group *);
123 void sysfs_remove_group(struct kobject *, const struct attribute_group *);
124 void sysfs_notify(struct kobject * k, char *dir, char *attr);
126 extern int __must_check sysfs_init(void);
128 #else /* CONFIG_SYSFS */
130 static inline int sysfs_create_dir(struct kobject * k)
135 static inline void sysfs_remove_dir(struct kobject * k)
140 static inline int sysfs_rename_dir(struct kobject * k, const char *new_name)
145 static inline int sysfs_create_file(struct kobject * k, const struct attribute * a)
150 static inline int sysfs_update_file(struct kobject * k, const struct attribute * a)
154 static inline int sysfs_chmod_file(struct kobject *kobj, struct attribute *attr, mode_t mode)
159 static inline void sysfs_remove_file(struct kobject * k, const struct attribute * a)
164 static inline int sysfs_create_link(struct kobject * k, struct kobject * t, const char * n)
169 static inline void sysfs_remove_link(struct kobject * k, const char * name)
175 static inline int sysfs_create_bin_file(struct kobject * k, struct bin_attribute * a)
180 static inline int sysfs_remove_bin_file(struct kobject * k, struct bin_attribute * a)
185 static inline int sysfs_create_group(struct kobject * k, const struct attribute_group *g)
190 static inline void sysfs_remove_group(struct kobject * k, const struct attribute_group * g)
195 static inline void sysfs_notify(struct kobject * k, char *dir, char *attr)
199 static inline int __must_check sysfs_init(void)
204 #endif /* CONFIG_SYSFS */
206 #endif /* _SYSFS_H_ */