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/*
* sysfs.h - definitions for the device driver filesystem
*
* Copyright (c) 2001,2002 Patrick Mochel
* Copyright (c) 2004 Silicon Graphics, Inc.
*
* Please see Documentation/filesystems/sysfs.txt for more information.
*/
#ifndef _SYSFS_H_
#define _SYSFS_H_
#include <linux/compiler.h>
#include <linux/errno.h>
#include <linux/list.h>
#include <asm/atomic.h>
struct kobject;
struct module;
struct nameidata;
struct dentry;
struct sysfs_dirent;
/* FIXME
* The *owner field is no longer used, but leave around
* until the tree gets cleaned up fully.
*/
struct attribute {
const char * name;
struct module * owner;
mode_t mode;
};
struct attribute_group {
const char * name;
struct attribute ** attrs;
};
/**
* Use these macros to make defining attributes easier. See include/linux/device.h
* for examples..
*/
#define __ATTR(_name,_mode,_show,_store) { \
.attr = {.name = __stringify(_name), .mode = _mode }, \
.show = _show, \
.store = _store, \
}
#define __ATTR_RO(_name) { \
.attr = { .name = __stringify(_name), .mode = 0444 }, \
.show = _name##_show, \
}
#define __ATTR_NULL { .attr = { .name = NULL } }
#define attr_name(_attr) (_attr).attr.name
struct vm_area_struct;
struct bin_attribute {
struct attribute attr;
size_t size;
void *private;
ssize_t (*read)(struct kobject *, struct bin_attribute *,
char *, loff_t, size_t);
ssize_t (*write)(struct kobject *, struct bin_attribute *,
char *, loff_t, size_t);
int (*mmap)(struct kobject *, struct bin_attribute *attr,
struct vm_area_struct *vma);
};
struct sysfs_ops {
ssize_t (*show)(struct kobject *, struct attribute *,char *);
ssize_t (*store)(struct kobject *,struct attribute *,const char *, size_t);
};
#define SYSFS_TYPE_MASK 0x00ff
#define SYSFS_ROOT 0x0001
#define SYSFS_DIR 0x0002
#define SYSFS_KOBJ_ATTR 0x0004
#define SYSFS_KOBJ_BIN_ATTR 0x0008
#define SYSFS_KOBJ_LINK 0x0020
#define SYSFS_COPY_NAME (SYSFS_DIR | SYSFS_KOBJ_LINK)
#define SYSFS_FLAG_MASK ~SYSFS_TYPE_MASK
#define SYSFS_FLAG_REMOVED 0x0100
#ifdef CONFIG_SYSFS
extern int sysfs_schedule_callback(struct kobject *kobj,
void (*func)(void *), void *data, struct module *owner);
extern int __must_check
sysfs_create_dir(struct kobject *kobj, struct sysfs_dirent *shadow_parent_sd);
extern void
sysfs_remove_dir(struct kobject *);
extern int __must_check
sysfs_rename_dir(struct kobject *kobj, struct sysfs_dirent *new_parent_sd,
const char *new_name);
extern int __must_check
sysfs_move_dir(struct kobject *, struct kobject *);
extern int __must_check
sysfs_create_file(struct kobject *, const struct attribute *);
extern int __must_check
sysfs_update_file(struct kobject *, const struct attribute *);
extern int __must_check
sysfs_chmod_file(struct kobject *kobj, struct attribute *attr, mode_t mode);
extern void
sysfs_remove_file(struct kobject *, const struct attribute *);
extern int __must_check
sysfs_create_link(struct kobject * kobj, struct kobject * target, const char * name);
extern void
sysfs_remove_link(struct kobject *, const char * name);
int __must_check sysfs_create_bin_file(struct kobject *kobj,
struct bin_attribute *attr);
void sysfs_remove_bin_file(struct kobject *kobj, struct bin_attribute *attr);
int __must_check sysfs_create_group(struct kobject *,
const struct attribute_group *);
void sysfs_remove_group(struct kobject *, const struct attribute_group *);
int sysfs_add_file_to_group(struct kobject *kobj,
const struct attribute *attr, const char *group);
void sysfs_remove_file_from_group(struct kobject *kobj,
const struct attribute *attr, const char *group);
void sysfs_notify(struct kobject * k, char *dir, char *attr);
extern int sysfs_make_shadowed_dir(struct kobject *kobj,
void * (*follow_link)(struct dentry *, struct nameidata *));
extern struct sysfs_dirent *sysfs_create_shadow_dir(struct kobject *kobj);
extern void sysfs_remove_shadow_dir(struct sysfs_dirent *shadow_sd);
extern int __must_check sysfs_init(void);
#else /* CONFIG_SYSFS */
static inline int sysfs_schedule_callback(struct kobject *kobj,
void (*func)(void *), void *data, struct module *owner)
{
return -ENOSYS;
}
static inline int sysfs_create_dir(struct kobject *kobj,
struct sysfs_dirent *shadow_parent_sd)
{
return 0;
}
static inline void sysfs_remove_dir(struct kobject * k)
{
;
}
static inline int sysfs_rename_dir(struct kobject *kobj,
struct sysfs_dirent *new_parent_sd,
const char *new_name)
{
return 0;
}
static inline int sysfs_move_dir(struct kobject * k, struct kobject * new_parent)
{
return 0;
}
static inline int sysfs_create_file(struct kobject * k, const struct attribute * a)
{
return 0;
}
static inline int sysfs_update_file(struct kobject * k, const struct attribute * a)
{
return 0;
}
static inline int sysfs_chmod_file(struct kobject *kobj, struct attribute *attr, mode_t mode)
{
return 0;
}
static inline void sysfs_remove_file(struct kobject * k, const struct attribute * a)
{
;
}
static inline int sysfs_create_link(struct kobject * k, struct kobject * t, const char * n)
{
return 0;
}
static inline void sysfs_remove_link(struct kobject * k, const char * name)
{
;
}
static inline int sysfs_create_bin_file(struct kobject * k, struct bin_attribute * a)
{
return 0;
}
static inline int sysfs_remove_bin_file(struct kobject * k, struct bin_attribute * a)
{
return 0;
}
static inline int sysfs_create_group(struct kobject * k, const struct attribute_group *g)
{
return 0;
}
static inline void sysfs_remove_group(struct kobject * k, const struct attribute_group * g)
{
;
}
static inline int sysfs_add_file_to_group(struct kobject *kobj,
const struct attribute *attr, const char *group)
{
return 0;
}
static inline void sysfs_remove_file_from_group(struct kobject *kobj,
const struct attribute *attr, const char *group)
{
}
static inline void sysfs_notify(struct kobject * k, char *dir, char *attr)
{
}
static inline int sysfs_make_shadowed_dir(struct kobject *kobj,
void * (*follow_link)(struct dentry *, struct nameidata *))
{
return 0;
}
static inline int __must_check sysfs_init(void)
{
return 0;
}
#endif /* CONFIG_SYSFS */
#endif /* _SYSFS_H_ */
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