Linux-2.6.12-rc2
[linux-2.6/kvm.git] / include / linux / sysfs.h
blob6f502ff7902a03bf880b2d4155ca146ae6d4654a
1 /*
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.
8 */
10 #ifndef _SYSFS_H_
11 #define _SYSFS_H_
13 #include <asm/atomic.h>
15 struct kobject;
16 struct module;
18 struct attribute {
19 char * name;
20 struct module * owner;
21 mode_t mode;
24 struct attribute_group {
25 char * name;
26 struct attribute ** attrs;
31 /**
32 * Use these macros to make defining attributes easier. See include/linux/device.h
33 * for examples..
36 #define __ATTR(_name,_mode,_show,_store) { \
37 .attr = {.name = __stringify(_name), .mode = _mode, .owner = THIS_MODULE }, \
38 .show = _show, \
39 .store = _store, \
42 #define __ATTR_RO(_name) { \
43 .attr = { .name = __stringify(_name), .mode = 0444, .owner = THIS_MODULE }, \
44 .show = _name##_show, \
47 #define __ATTR_NULL { .attr = { .name = NULL } }
49 #define attr_name(_attr) (_attr).attr.name
51 struct vm_area_struct;
53 struct bin_attribute {
54 struct attribute attr;
55 size_t size;
56 void *private;
57 ssize_t (*read)(struct kobject *, char *, loff_t, size_t);
58 ssize_t (*write)(struct kobject *, char *, loff_t, size_t);
59 int (*mmap)(struct kobject *, struct bin_attribute *attr,
60 struct vm_area_struct *vma);
63 struct sysfs_ops {
64 ssize_t (*show)(struct kobject *, struct attribute *,char *);
65 ssize_t (*store)(struct kobject *,struct attribute *,const char *, size_t);
68 struct sysfs_dirent {
69 atomic_t s_count;
70 struct list_head s_sibling;
71 struct list_head s_children;
72 void * s_element;
73 int s_type;
74 umode_t s_mode;
75 struct dentry * s_dentry;
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_NOT_PINNED (SYSFS_KOBJ_ATTR | SYSFS_KOBJ_BIN_ATTR | SYSFS_KOBJ_LINK)
85 #ifdef CONFIG_SYSFS
87 extern int
88 sysfs_create_dir(struct kobject *);
90 extern void
91 sysfs_remove_dir(struct kobject *);
93 extern int
94 sysfs_rename_dir(struct kobject *, const char *new_name);
96 extern int
97 sysfs_create_file(struct kobject *, const struct attribute *);
99 extern int
100 sysfs_update_file(struct kobject *, const struct attribute *);
102 extern void
103 sysfs_remove_file(struct kobject *, const struct attribute *);
105 extern int
106 sysfs_create_link(struct kobject * kobj, struct kobject * target, char * name);
108 extern void
109 sysfs_remove_link(struct kobject *, char * name);
111 int sysfs_create_bin_file(struct kobject * kobj, struct bin_attribute * attr);
112 int sysfs_remove_bin_file(struct kobject * kobj, struct bin_attribute * attr);
114 int sysfs_create_group(struct kobject *, const struct attribute_group *);
115 void sysfs_remove_group(struct kobject *, const struct attribute_group *);
117 #else /* CONFIG_SYSFS */
119 static inline int sysfs_create_dir(struct kobject * k)
121 return 0;
124 static inline void sysfs_remove_dir(struct kobject * k)
129 static inline int sysfs_rename_dir(struct kobject * k, const char *new_name)
131 return 0;
134 static inline int sysfs_create_file(struct kobject * k, const struct attribute * a)
136 return 0;
139 static inline int sysfs_update_file(struct kobject * k, const struct attribute * a)
141 return 0;
144 static inline void sysfs_remove_file(struct kobject * k, const struct attribute * a)
149 static inline int sysfs_create_link(struct kobject * k, struct kobject * t, char * n)
151 return 0;
154 static inline void sysfs_remove_link(struct kobject * k, char * name)
160 static inline int sysfs_create_bin_file(struct kobject * k, struct bin_attribute * a)
162 return 0;
165 static inline int sysfs_remove_bin_file(struct kobject * k, struct bin_attribute * a)
167 return 0;
170 static inline int sysfs_create_group(struct kobject * k, const struct attribute_group *g)
172 return 0;
175 static inline void sysfs_remove_group(struct kobject * k, const struct attribute_group * g)
180 #endif /* CONFIG_SYSFS */
182 #endif /* _SYSFS_H_ */