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/list.h>
15 #include <asm/atomic.h>
23 struct module * owner;
27 struct attribute_group {
29 struct attribute ** attrs;
35 * Use these macros to make defining attributes easier. See include/linux/device.h
39 #define __ATTR(_name,_mode,_show,_store) { \
40 .attr = {.name = __stringify(_name), .mode = _mode, .owner = THIS_MODULE }, \
45 #define __ATTR_RO(_name) { \
46 .attr = { .name = __stringify(_name), .mode = 0444, .owner = THIS_MODULE }, \
47 .show = _name##_show, \
50 #define __ATTR_NULL { .attr = { .name = NULL } }
52 #define attr_name(_attr) (_attr).attr.name
54 struct vm_area_struct;
56 struct bin_attribute {
57 struct attribute attr;
60 ssize_t (*read)(struct kobject *, char *, loff_t, size_t);
61 ssize_t (*write)(struct kobject *, char *, loff_t, size_t);
62 int (*mmap)(struct kobject *, struct bin_attribute *attr,
63 struct vm_area_struct *vma);
67 ssize_t (*show)(struct kobject *, struct attribute *,char *);
68 ssize_t (*store)(struct kobject *,struct attribute *,const char *, size_t);
73 struct list_head s_sibling;
74 struct list_head s_children;
78 struct dentry * s_dentry;
79 struct iattr * s_iattr;
83 #define SYSFS_ROOT 0x0001
84 #define SYSFS_DIR 0x0002
85 #define SYSFS_KOBJ_ATTR 0x0004
86 #define SYSFS_KOBJ_BIN_ATTR 0x0008
87 #define SYSFS_KOBJ_LINK 0x0020
88 #define SYSFS_NOT_PINNED (SYSFS_KOBJ_ATTR | SYSFS_KOBJ_BIN_ATTR | SYSFS_KOBJ_LINK)
92 extern int __must_check
93 sysfs_create_dir(struct kobject *, struct dentry *);
96 sysfs_remove_dir(struct kobject *);
98 extern int __must_check
99 sysfs_rename_dir(struct kobject *, struct dentry *, const char *new_name);
101 extern int __must_check
102 sysfs_move_dir(struct kobject *, struct kobject *);
104 extern int __must_check
105 sysfs_create_file(struct kobject *, const struct attribute *);
107 extern int __must_check
108 sysfs_update_file(struct kobject *, const struct attribute *);
110 extern int __must_check
111 sysfs_chmod_file(struct kobject *kobj, struct attribute *attr, mode_t mode);
114 sysfs_remove_file(struct kobject *, const struct attribute *);
116 extern int __must_check
117 sysfs_create_link(struct kobject * kobj, struct kobject * target, const char * name);
120 sysfs_remove_link(struct kobject *, const char * name);
122 int __must_check sysfs_create_bin_file(struct kobject *kobj,
123 struct bin_attribute *attr);
124 void sysfs_remove_bin_file(struct kobject *kobj, struct bin_attribute *attr);
126 int __must_check sysfs_create_group(struct kobject *,
127 const struct attribute_group *);
128 void sysfs_remove_group(struct kobject *, const struct attribute_group *);
129 void sysfs_notify(struct kobject * k, char *dir, char *attr);
132 extern int sysfs_make_shadowed_dir(struct kobject *kobj,
133 void * (*follow_link)(struct dentry *, struct nameidata *));
134 extern struct dentry *sysfs_create_shadow_dir(struct kobject *kobj);
135 extern void sysfs_remove_shadow_dir(struct dentry *dir);
137 extern int __must_check sysfs_init(void);
139 #else /* CONFIG_SYSFS */
141 static inline int sysfs_create_dir(struct kobject * k, struct dentry *shadow)
146 static inline void sysfs_remove_dir(struct kobject * k)
151 static inline int sysfs_rename_dir(struct kobject * k,
152 struct dentry *new_parent,
153 const char *new_name)
158 static inline int sysfs_move_dir(struct kobject * k, struct kobject * new_parent)
163 static inline int sysfs_create_file(struct kobject * k, const struct attribute * a)
168 static inline int sysfs_update_file(struct kobject * k, const struct attribute * a)
172 static inline int sysfs_chmod_file(struct kobject *kobj, struct attribute *attr, mode_t mode)
177 static inline void sysfs_remove_file(struct kobject * k, const struct attribute * a)
182 static inline int sysfs_create_link(struct kobject * k, struct kobject * t, const char * n)
187 static inline void sysfs_remove_link(struct kobject * k, const char * name)
193 static inline int sysfs_create_bin_file(struct kobject * k, struct bin_attribute * a)
198 static inline int sysfs_remove_bin_file(struct kobject * k, struct bin_attribute * a)
203 static inline int sysfs_create_group(struct kobject * k, const struct attribute_group *g)
208 static inline void sysfs_remove_group(struct kobject * k, const struct attribute_group * g)
213 static inline void sysfs_notify(struct kobject * k, char *dir, char *attr)
217 static inline int sysfs_make_shadowed_dir(struct kobject *kobj,
218 void * (*follow_link)(struct dentry *, struct nameidata *))
223 static inline int __must_check sysfs_init(void)
228 #endif /* CONFIG_SYSFS */
230 #endif /* _SYSFS_H_ */