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/*

 * 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;

        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_ */