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/*

 * kobject.h - generic kernel object infrastructure.

 *

 * Copyright (c) 2002-2003 Patrick Mochel

 * Copyright (c) 2002-2003 Open Source Development Labs

 * Copyright (c) 2006-2008 Greg Kroah-Hartman 

 * Copyright (c) 2006-2008 Novell Inc.

 *

 * This file is released under the GPLv2.

 *

 * Please read Documentation/kobject.txt before using the kobject

 * interface, ESPECIALLY the parts about reference counts and object

 * destructors.

 */

#ifndef _KOBJECT_H_

#define _KOBJECT_H_

#include 

#include 

//#include 

#include 

#include 

#include 

//#include 

#include 

#include 

//#include 

#define UEVENT_HELPER_PATH_LEN		256

#define UEVENT_NUM_ENVP			32	/* number of env pointers */

#define UEVENT_BUFFER_SIZE		2048	/* buffer for the variables */

#ifdef CONFIG_UEVENT_HELPER

/* path to the userspace helper executed on an event */

extern char uevent_helper[];

#endif

/* counter to tag the uevent, read only except for the kobject core */

extern u64 uevent_seqnum;

/*

 * The actions here must match the index to the string array

 * in lib/kobject_uevent.c

 *

 * Do not add new actions here without checking with the driver-core

 * maintainers. Action strings are not meant to express subsystem

 * or device specific properties. In most cases you want to send a

 * kobject_uevent_env(kobj, KOBJ_CHANGE, env) with additional event

 * specific variables added to the event environment.

 */

enum kobject_action {

	KOBJ_ADD,

	KOBJ_REMOVE,

	KOBJ_CHANGE,

	KOBJ_MOVE,

	KOBJ_ONLINE,

	KOBJ_OFFLINE,

	KOBJ_MAX

};

struct kobject {

    const char          *name;

	struct list_head	entry;

	struct kobject		*parent;

//    struct kset         *kset;

	struct kobj_type	*ktype;

//   struct sysfs_dirent *sd;

	struct kref		kref;

#ifdef CONFIG_DEBUG_KOBJECT_RELEASE

	struct delayed_work	release;

#endif

	unsigned int state_initialized:1;

	unsigned int state_in_sysfs:1;

	unsigned int state_add_uevent_sent:1;

	unsigned int state_remove_uevent_sent:1;

	unsigned int uevent_suppress:1;

};

extern __printf(2, 3)

int kobject_set_name(struct kobject *kobj, const char *name, ...);

extern int kobject_set_name_vargs(struct kobject *kobj, const char *fmt,

				  va_list vargs);

static inline const char *kobject_name(const struct kobject *kobj)

{

	return kobj->name;

}

extern void kobject_init(struct kobject *kobj, struct kobj_type *ktype);

extern __printf(3, 4) __must_check

int kobject_add(struct kobject *kobj, struct kobject *parent,

		const char *fmt, ...);

extern __printf(4, 5) __must_check

int kobject_init_and_add(struct kobject *kobj,

			 struct kobj_type *ktype, struct kobject *parent,

			 const char *fmt, ...);

extern void kobject_del(struct kobject *kobj);

extern struct kobject * __must_check kobject_create(void);

extern struct kobject * __must_check kobject_create_and_add(const char *name,

						struct kobject *parent);

extern int __must_check kobject_rename(struct kobject *, const char *new_name);

extern int __must_check kobject_move(struct kobject *, struct kobject *);

extern struct kobject *kobject_get(struct kobject *kobj);

extern void kobject_put(struct kobject *kobj);

extern const void *kobject_namespace(struct kobject *kobj);

extern char *kobject_get_path(struct kobject *kobj, gfp_t flag);

struct kobj_type {

	void (*release)(struct kobject *kobj);

//   const struct sysfs_ops *sysfs_ops;

//   struct attribute **default_attrs;

//   const struct kobj_ns_type_operations *(*child_ns_type)(struct kobject *kobj);

//   const void *(*namespace)(struct kobject *kobj);

};

struct kobj_uevent_env {

	char *envp[UEVENT_NUM_ENVP];

	int envp_idx;

	char buf[UEVENT_BUFFER_SIZE];

	int buflen;

};

//struct kset_uevent_ops {

//   int (* const filter)(struct kset *kset, struct kobject *kobj);

//   const char *(* const name)(struct kset *kset, struct kobject *kobj);

//   int (* const uevent)(struct kset *kset, struct kobject *kobj,

//             struct kobj_uevent_env *env);

//};

struct kobj_attribute {

//   struct attribute attr;

	ssize_t (*show)(struct kobject *kobj, struct kobj_attribute *attr,

			char *buf);

	ssize_t (*store)(struct kobject *kobj, struct kobj_attribute *attr,

			 const char *buf, size_t count);

};

extern const struct sysfs_ops kobj_sysfs_ops;

struct sock;

/**

 * struct kset - a set of kobjects of a specific type, belonging to a specific subsystem.

 *

 * A kset defines a group of kobjects.  They can be individually

 * different "types" but overall these kobjects all want to be grouped

 * together and operated on in the same manner.  ksets are used to

 * define the attribute callbacks and other common events that happen to

 * a kobject.

 *

 * @list: the list of all kobjects for this kset

 * @list_lock: a lock for iterating over the kobjects

 * @kobj: the embedded kobject for this kset (recursion, isn't it fun...)

 * @uevent_ops: the set of uevent operations for this kset.  These are

 * called whenever a kobject has something happen to it so that the kset

 * can add new environment variables, or filter out the uevents if so

 * desired.

 */

struct kset {

	struct list_head list;

	spinlock_t list_lock;

	struct kobject kobj;

//   const struct kset_uevent_ops *uevent_ops;

};

//extern void kset_init(struct kset *kset);

//extern int __must_check kset_register(struct kset *kset);

//extern void kset_unregister(struct kset *kset);

//extern struct kset * __must_check kset_create_and_add(const char *name,

//                       const struct kset_uevent_ops *u,

//                       struct kobject *parent_kobj);

//static inline struct kset *to_kset(struct kobject *kobj)

//{

//   return kobj ? container_of(kobj, struct kset, kobj) : NULL;

//}

//static inline struct kset *kset_get(struct kset *k)

//{

//   return k ? to_kset(kobject_get(&k->kobj)) : NULL;

//}

//static inline void kset_put(struct kset *k)

//{

//   kobject_put(&k->kobj);

//}

static inline struct kobj_type *get_ktype(struct kobject *kobj)

{

	return kobj->ktype;

}

//extern struct kobject *kset_find_obj(struct kset *, const char *);

/* The global /sys/kernel/ kobject for people to chain off of */

extern struct kobject *kernel_kobj;

/* The global /sys/kernel/mm/ kobject for people to chain off of */

extern struct kobject *mm_kobj;

/* The global /sys/hypervisor/ kobject for people to chain off of */

extern struct kobject *hypervisor_kobj;

/* The global /sys/power/ kobject for people to chain off of */

extern struct kobject *power_kobj;

/* The global /sys/firmware/ kobject for people to chain off of */

extern struct kobject *firmware_kobj;

int kobject_uevent(struct kobject *kobj, enum kobject_action action);

int kobject_uevent_env(struct kobject *kobj, enum kobject_action action,

			char *envp[]);

__printf(2, 3)

int add_uevent_var(struct kobj_uevent_env *env, const char *format, ...);

int kobject_action_type(const char *buf, size_t count,

			enum kobject_action *type);

#endif /* _KOBJECT_H_ */