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     €АЗѓtBїВЕ =    // SPDX-License-Identifier: GPL-2.0
/*
 * 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 <greg@kroah.com>
 * Copyright (c) 2006-2008 Novell Inc.
 *
 * Please read Documentation/core-api/kobject.rst before using the kobject
 * interface, ESPECIALLY the parts about reference counts and object
 * destructors.
 */

#ifndef _KOBJECT_H_
#define _KOBJECT_H_

#include <linux/types.h>
#include <linux/list.h>
#include <linux/sysfs.h>
#include <linux/compiler.h>
#include <linux/spinlock.h>
#include <linux/kref.h>
#include <linux/kobject_ns.h>
#include <linux/kernel.h>
#include <linux/wait.h>
#include <linux/atomic.h>
#include <linux/workqueue.h>
#include <linux/uidgid.h>

#define UEVENT_HELPER_PATH_LEN		256
#define UEVENT_NUM_ENVP			64	/* 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_BIND,
	KOBJ_UNBIND,
};

struct kobject {
	const char		*name;
	struct list_head	entry;
	struct kobject		*parent;
	struct kset		*kset;
	const struct kobj_type	*ktype;
	struct kernfs_node	*sd; /* sysfs directory entry */
	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;
};

__printf(2, 3) int kobject_set_name(struct kobject *kobj, const char *name, ...);
__printf(2, 0) 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;
}

void kobject_init(struct kobject *kobj, const struct kobj_type *ktype);
__printf(3, 4) __must_check int kobject_add(struct kobject *kobj,
					    struct kobject *parent,
					    const char *fmt, ...);
__printf(4, 5) __must_check int kobject_init_and_add(struct kobject *kobj,
						     const struct kobj_type *ktype,
						     struct kobject *parent,
						     const char *fmt, ...);

void kobject_del(struct kobject *kobj);

struct kobject * __must_check kobject_create(void);
struct kobject * __must_check kobject_create_and_add(const char *name, struct kobject *parent);

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

struct kobject *kobject_get(struct kobject *kobj);
struct kobject * __must_check kobject_get_unless_zero(struct kobject *kobj);
void kobject_put(struct kobject *kobj);

const void *kobject_namespace(const struct kobject *kobj);
void kobject_get_ownership(const struct kobject *kobj, kuid_t *uid, kgid_t *gid);
char *kobject_get_path(const struct kobject *kobj, gfp_t flag);

struct kobj_type {
	void (*release)(struct kobject *kobj);
	const struct sysfs_ops *sysfs_ops;
	struct attribute **default_attrs;	/* use default_groups instead */
	const struct attribute_group **default_groups;
	const struct kobj_ns_type_operations *(*child_ns_type)(const struct kobject *kobj);
	const void *(*namespace)(const struct kobject *kobj);
	void (*get_ownership)(const struct kobject *kobj, kuid_t *uid, kgid_t *gid);
};

struct kobj_uevent_env {
	char *argv[3]