kernel-ark/include/linux/sysfs.h
James Bottomley d4acd722b7 [SCSI] sysfs: add filter function to groups
This patch allows the various users of attribute_groups to selectively
allow the appearance of group attributes.  The primary consumer of
this will be the transport classes in which we currently have
elaborate attribute selection algorithms to do this same thing.

Acked-by: Greg KH <greg@kroah.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2008-01-23 11:29:18 -06:00

224 lines
5.2 KiB
C

/*
* sysfs.h - definitions for the device driver filesystem
*
* Copyright (c) 2001,2002 Patrick Mochel
* Copyright (c) 2004 Silicon Graphics, Inc.
* Copyright (c) 2007 SUSE Linux Products GmbH
* Copyright (c) 2007 Tejun Heo <teheo@suse.de>
*
* 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;
/* 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;
int (*is_visible)(struct kobject *,
struct attribute *, int);
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);
};
#ifdef CONFIG_SYSFS
int sysfs_schedule_callback(struct kobject *kobj, void (*func)(void *),
void *data, struct module *owner);
int __must_check sysfs_create_dir(struct kobject *kobj);
void sysfs_remove_dir(struct kobject *kobj);
int __must_check sysfs_rename_dir(struct kobject *kobj, const char *new_name);
int __must_check sysfs_move_dir(struct kobject *kobj,
struct kobject *new_parent_kobj);
int __must_check sysfs_create_file(struct kobject *kobj,
const struct attribute *attr);
int __must_check sysfs_chmod_file(struct kobject *kobj, struct attribute *attr,
mode_t mode);
void sysfs_remove_file(struct kobject *kobj, const struct attribute *attr);
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_link(struct kobject *kobj, struct kobject *target,
const char *name);
void sysfs_remove_link(struct kobject *kobj, const char *name);
int __must_check sysfs_create_group(struct kobject *kobj,
const struct attribute_group *grp);
void sysfs_remove_group(struct kobject *kobj,
const struct attribute_group *grp);
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 *kobj, char *dir, char *attr);
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)
{
return 0;
}
static inline void sysfs_remove_dir(struct kobject *kobj)
{
;
}
static inline int sysfs_rename_dir(struct kobject *kobj, const char *new_name)
{
return 0;
}
static inline int sysfs_move_dir(struct kobject *kobj,
struct kobject *new_parent_kobj)
{
return 0;
}
static inline int sysfs_create_file(struct kobject *kobj,
const struct attribute *attr)
{
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 *kobj,
const struct attribute *attr)
{
;
}
static inline int sysfs_create_bin_file(struct kobject *kobj,
struct bin_attribute *attr)
{
return 0;
}
static inline int sysfs_remove_bin_file(struct kobject *kobj,
struct bin_attribute *attr)
{
return 0;
}
static inline int sysfs_create_link(struct kobject *kobj,
struct kobject *target, const char *name)
{
return 0;
}
static inline void sysfs_remove_link(struct kobject *kobj, const char *name)
{
;
}
static inline int sysfs_create_group(struct kobject *kobj,
const struct attribute_group *grp)
{
return 0;
}
static inline void sysfs_remove_group(struct kobject *kobj,
const struct attribute_group *grp)
{
;
}
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 *kobj, char *dir, char *attr)
{
}
static inline int __must_check sysfs_init(void)
{
return 0;
}
#endif /* CONFIG_SYSFS */
#endif /* _SYSFS_H_ */