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 * The *owner field is no longer used, but leave around
26 * until the tree gets cleaned up fully.
30 struct module * owner;
34 struct attribute_group {
36 struct attribute ** attrs;
42 * Use these macros to make defining attributes easier. See include/linux/device.h
46 #define __ATTR(_name,_mode,_show,_store) { \
47 .attr = {.name = __stringify(_name), .mode = _mode }, \
52 #define __ATTR_RO(_name) { \
53 .attr = { .name = __stringify(_name), .mode = 0444 }, \
54 .show = _name##_show, \
57 #define __ATTR_NULL { .attr = { .name = NULL } }
59 #define attr_name(_attr) (_attr).attr.name
61 struct vm_area_struct;
63 struct bin_attribute {
64 struct attribute attr;
67 ssize_t (*read)(struct kobject *, struct bin_attribute *,
68 char *, loff_t, size_t);
69 ssize_t (*write)(struct kobject *, struct bin_attribute *,
70 char *, loff_t, size_t);
71 int (*mmap)(struct kobject *, struct bin_attribute *attr,
72 struct vm_area_struct *vma);
76 ssize_t (*show)(struct kobject *, struct attribute *,char *);
77 ssize_t (*store)(struct kobject *,struct attribute *,const char *, size_t);
80 #define SYSFS_TYPE_MASK 0x00ff
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_COPY_NAME (SYSFS_DIR | SYSFS_KOBJ_LINK)
88 #define SYSFS_FLAG_MASK ~SYSFS_TYPE_MASK
89 #define SYSFS_FLAG_REMOVED 0x0100
93 extern int sysfs_schedule_callback(struct kobject *kobj,
94 void (*func)(void *), void *data, struct module *owner);
96 extern int __must_check
97 sysfs_create_dir(struct kobject *kobj, struct sysfs_dirent *shadow_parent_sd);
100 sysfs_remove_dir(struct kobject *);
102 extern int __must_check
103 sysfs_rename_dir(struct kobject *kobj, struct sysfs_dirent *new_parent_sd,
104 const char *new_name);
106 extern int __must_check
107 sysfs_move_dir(struct kobject *, struct kobject *);
109 extern int __must_check
110 sysfs_create_file(struct kobject *, const struct attribute *);
112 extern int __must_check
113 sysfs_update_file(struct kobject *, const struct attribute *);
115 extern int __must_check
116 sysfs_chmod_file(struct kobject *kobj, struct attribute *attr, mode_t mode);
119 sysfs_remove_file(struct kobject *, const struct attribute *);
121 extern int __must_check
122 sysfs_create_link(struct kobject * kobj, struct kobject * target, const char * name);
125 sysfs_remove_link(struct kobject *, const char * name);
127 int __must_check sysfs_create_bin_file(struct kobject *kobj,
128 struct bin_attribute *attr);
129 void sysfs_remove_bin_file(struct kobject *kobj, struct bin_attribute *attr);
131 int __must_check sysfs_create_group(struct kobject *,
132 const struct attribute_group *);
133 void sysfs_remove_group(struct kobject *, const struct attribute_group *);
134 int sysfs_add_file_to_group(struct kobject *kobj,
135 const struct attribute *attr, const char *group);
136 void sysfs_remove_file_from_group(struct kobject *kobj,
137 const struct attribute *attr, const char *group);
139 void sysfs_notify(struct kobject * k, char *dir, char *attr);
142 extern int sysfs_make_shadowed_dir(struct kobject *kobj,
143 void * (*follow_link)(struct dentry *, struct nameidata *));
144 extern struct sysfs_dirent *sysfs_create_shadow_dir(struct kobject *kobj);
145 extern void sysfs_remove_shadow_dir(struct sysfs_dirent *shadow_sd);
147 extern int __must_check sysfs_init(void);
149 #else /* CONFIG_SYSFS */
151 static inline int sysfs_schedule_callback(struct kobject *kobj,
152 void (*func)(void *), void *data, struct module *owner)
157 static inline int sysfs_create_dir(struct kobject *kobj,
158 struct sysfs_dirent *shadow_parent_sd)
163 static inline void sysfs_remove_dir(struct kobject * k)
168 static inline int sysfs_rename_dir(struct kobject *kobj,
169 struct sysfs_dirent *new_parent_sd,
170 const char *new_name)
175 static inline int sysfs_move_dir(struct kobject * k, struct kobject * new_parent)
180 static inline int sysfs_create_file(struct kobject * k, const struct attribute * a)
185 static inline int sysfs_update_file(struct kobject * k, const struct attribute * a)
189 static inline int sysfs_chmod_file(struct kobject *kobj, struct attribute *attr, mode_t mode)
194 static inline void sysfs_remove_file(struct kobject * k, const struct attribute * a)
199 static inline int sysfs_create_link(struct kobject * k, struct kobject * t, const char * n)
204 static inline void sysfs_remove_link(struct kobject * k, const char * name)
210 static inline int sysfs_create_bin_file(struct kobject * k, struct bin_attribute * a)
215 static inline int sysfs_remove_bin_file(struct kobject * k, struct bin_attribute * a)
220 static inline int sysfs_create_group(struct kobject * k, const struct attribute_group *g)
225 static inline void sysfs_remove_group(struct kobject * k, const struct attribute_group * g)
230 static inline int sysfs_add_file_to_group(struct kobject *kobj,
231 const struct attribute *attr, const char *group)
236 static inline void sysfs_remove_file_from_group(struct kobject *kobj,
237 const struct attribute *attr, const char *group)
241 static inline void sysfs_notify(struct kobject * k, char *dir, char *attr)
245 static inline int sysfs_make_shadowed_dir(struct kobject *kobj,
246 void * (*follow_link)(struct dentry *, struct nameidata *))
251 static inline int __must_check sysfs_init(void)
256 #endif /* CONFIG_SYSFS */
258 #endif /* _SYSFS_H_ */