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  +   €l–Ь4э( ©і( 	ЕЂfаB¦-яї„lOІЯ_†I|ҐЏ+ГВ ?ч     /* SPDX-License-Identifier: GPL-2.0 */
/*
 * Portions Copyright (C) 1992 Drew Eckhardt
 */
#ifndef _LINUX_BLKDEV_H
#define _LINUX_BLKDEV_H

#include <linux/types.h>
#include <linux/blk_types.h>
#include <linux/device.h>
#include <linux/list.h>
#include <linux/llist.h>
#include <linux/minmax.h>
#include <linux/timer.h>
#include <linux/workqueue.h>
#include <linux/wait.h>
#include <linux/bio.h>
#include <linux/gfp.h>
#include <linux/kdev_t.h>
#include <linux/rcupdate.h>
#include <linux/percpu-refcount.h>
#include <linux/blkzoned.h>
#include <linux/sched.h>
#include <linux/sbitmap.h>
#include <linux/uuid.h>
#include <linux/xarray.h>
#include <linux/file.h>
#include <linux/lockdep.h>

struct module;
struct request_queue;
struct elevator_queue;
struct blk_trace;
struct request;
struct sg_io_hdr;
struct blkcg_gq;
struct blk_flush_queue;
struct kiocb;
struct pr_ops;
struct rq_qos;
struct blk_queue_stats;
struct blk_stat_callback;
struct blk_crypto_profile;

extern const struct device_type disk_type;
extern const struct device_type part_type;
extern const struct class block_class;

/*
 * Maximum number of blkcg policies allowed to be registered concurrently.
 * Defined here to simplify include dependency.
 */
#define BLKCG_MAX_POLS		6

#define DISK_MAX_PARTS			256
#define DISK_NAME_LEN			32

#define PARTITION_META_INFO_VOLNAMELTH	64
/*
 * Enough for the string representation of any kind of UUID plus NULL.
 * EFI UUID is 36 characters. MSDOS UUID is 11 characters.
 */
#define PARTITION_META_INFO_UUIDLTH	(UUID_STRING_LEN + 1)

struct partition_meta_info {
	char uuid[PARTITION_META_INFO_UUIDLTH];
	u8 volname[PARTITION_META_INFO_VOLNAMELTH];
};

/**
 * DOC: genhd capability flags
 *
 * ``GENHD_FL_REMOVABLE``: indicates that the block device gives access to
 * removable media.  When set, the device remains present even when media is not
 * inserted.  Shall not be set for devices which are removed entirely when the
 * media is removed.
 *
 * ``GENHD_FL_HIDDEN``: the block device is hidden; it doesn't produce events,
 * doesn't appear in sysfs, and can't be opened from userspace or using
 * blkdev_get*. Used for the underlying components of multipath devices.
 *
 * ``GENHD_FL_NO_PART``: partition support is disabled.  The kernel will not
 * scan for partitions from add_disk, and users can't add partitions manually.
 *
 */
enum {
	GENHD_FL_REMOVABLE			= 1 << 0,
	GENHD_FL_HIDDEN				= 1 << 1,
	GENHD_FL_NO_PART			= 1 << 2,
};

enum {
	DISK_EVENT_MEDIA_CHANGE			= 1 << 0, /* media changed */
	DISK_EVENT_EJECT_REQUEST		= 1 << 1, /* eject requested */
};

enum {
	/* Poll even if events_poll_msecs is unset */
	DISK_EVENT_FLAG_POLL			= 1 << 0,
	/* Forward events to udev */
	DISK_EVENT_FLAG_UEVENT			= 1 << 1,
	/* Block event polling when open for exclusive write */
	DISK_EVENT_FLAG_BLOCK_ON_EXCL_WRITE	= 1 << 2,
};

struct disk_events;
struct badblocks;

enum blk_integrity_checksum {
	BLK_INTEGRITY_CSUM_NONE		= 0,
	BLK_INTEGRITY_CSUM_IP		= 1,
	BLK_INTEGRITY_CSUM_CRC		= 2,
	BLK_INTEGRITY_CSUM_CRC64	= 3,
} __packed ;

struct blk_integrity {
	unsigned char				flags;
	enum blk_integrity_checksum		csum_type;
	unsigned char				tuple_size;
	unsigned char				pi_offset;
	unsigned char				interval_exp;
	unsigned char				tag_size;

	RH_KABI_RESERVE(1)
	RH_KABI_RESERVE(2)
};

typedef unsigned int __bitwise blk_mode_t;

/* open for reading */
#define BLK_OPEN_READ		((__force blk_mode_t)(1 << 0))
/* open for writing */
#define BLK_OPEN_WRITE		((__force blk_mode_t)(1 << 1))
/* open exclusively (vs other exclusive openers */
#define BLK_OPEN_EXCL		((__force blk_mode_t)(1 << 2))
/* opened with O_NDELAY */
#define BLK_OPEN_NDELAY		((__force blk_mode_t)(1 << 3))
/* open for "writes" only for ioctls (specialy hack for floppy.c) */
#define BLK_OPEN_WRITE_IOCTL	((__force blk_mode_t)(1 << 4))
/* open is exclusive wrt all other BLK_OPEN_WRITE opens to the device */
#define BLK_OPEN_RESTRICT_WRITES	((__force blk_mode_t)(1 << 5))
/* return partition scanning errors */
#define BLK_OPEN_STRICT_SCAN	((__force b