[people/ms/u-boot.git] / include / zfs / vdev_impl.h

/*
 *  GRUB  --  GRand Unified Bootloader
 *  Copyright (C) 1999,2000,2001,2002,2003,2004  Free Software Foundation, Inc.
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */
/*
 * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#ifndef _SYS_VDEV_IMPL_H
#define	_SYS_VDEV_IMPL_H

#define	VDEV_SKIP_SIZE		(8 << 10)
#define	VDEV_BOOT_HEADER_SIZE	(8 << 10)
#define	VDEV_PHYS_SIZE		(112 << 10)
#define	VDEV_UBERBLOCK_RING	(128 << 10)

/* ZFS boot block */
#define	VDEV_BOOT_MAGIC		0x2f5b007b10cULL
#define	VDEV_BOOT_VERSION	1		/* version number	*/

typedef struct vdev_boot_header {
	uint64_t	vb_magic;		/* VDEV_BOOT_MAGIC	*/
	uint64_t	vb_version;		/* VDEV_BOOT_VERSION	*/
	uint64_t	vb_offset;		/* start offset	(bytes) */
	uint64_t	vb_size;		/* size (bytes)		*/
	char		vb_pad[VDEV_BOOT_HEADER_SIZE - 4 * sizeof(uint64_t)];
} vdev_boot_header_t;

typedef struct vdev_phys {
	char		vp_nvlist[VDEV_PHYS_SIZE - sizeof(zio_eck_t)];
	zio_eck_t	vp_zbt;
} vdev_phys_t;

typedef struct vdev_label {
	char		vl_pad[VDEV_SKIP_SIZE];			/*   8K	*/
	vdev_boot_header_t vl_boot_header;			/*   8K	*/
	vdev_phys_t	vl_vdev_phys;				/* 112K	*/
	char		vl_uberblock[VDEV_UBERBLOCK_RING];	/* 128K	*/
} vdev_label_t;							/* 256K total */

/*
 * Size and offset of embedded boot loader region on each label.
 * The total size of the first two labels plus the boot area is 4MB.
 */
#define	VDEV_BOOT_OFFSET	(2 * sizeof(vdev_label_t))
#define	VDEV_BOOT_SIZE		(7ULL << 19)			/* 3.5M	*/

/*
 * Size of label regions at the start and end of each leaf device.
 */
#define	VDEV_LABEL_START_SIZE	(2 * sizeof(vdev_label_t) + VDEV_BOOT_SIZE)
#define	VDEV_LABEL_END_SIZE	(2 * sizeof(vdev_label_t))
#define	VDEV_LABELS		4

#endif	/* _SYS_VDEV_IMPL_H */
Commit	Line	Data
4d3c95f5 JL	1	/*
	2	* GRUB -- GRand Unified Bootloader
	3	* Copyright (C) 1999,2000,2001,2002,2003,2004 Free Software Foundation, Inc.
	4	*
1a459660	5	* SPDX-License-Identifier: GPL-2.0+
4d3c95f5 JL	6	*/
	7	/*
	8	* Copyright 2010 Sun Microsystems, Inc. All rights reserved.
	9	* Use is subject to license terms.
	10	*/
	11
	12	#ifndef _SYS_VDEV_IMPL_H
	13	#define _SYS_VDEV_IMPL_H
	14
	15	#define VDEV_SKIP_SIZE (8 << 10)
	16	#define VDEV_BOOT_HEADER_SIZE (8 << 10)
	17	#define VDEV_PHYS_SIZE (112 << 10)
	18	#define VDEV_UBERBLOCK_RING (128 << 10)
	19
	20	/* ZFS boot block */
	21	#define VDEV_BOOT_MAGIC 0x2f5b007b10cULL
	22	#define VDEV_BOOT_VERSION 1 /* version number */
	23
	24	typedef struct vdev_boot_header {
	25	uint64_t vb_magic; /* VDEV_BOOT_MAGIC */
	26	uint64_t vb_version; /* VDEV_BOOT_VERSION */
	27	uint64_t vb_offset; /* start offset (bytes) */
	28	uint64_t vb_size; /* size (bytes) */
	29	char vb_pad[VDEV_BOOT_HEADER_SIZE - 4 * sizeof(uint64_t)];
	30	} vdev_boot_header_t;
	31
	32	typedef struct vdev_phys {
	33	char vp_nvlist[VDEV_PHYS_SIZE - sizeof(zio_eck_t)];
	34	zio_eck_t vp_zbt;
	35	} vdev_phys_t;
	36
	37	typedef struct vdev_label {
	38	char vl_pad[VDEV_SKIP_SIZE]; /* 8K */
	39	vdev_boot_header_t vl_boot_header; /* 8K */
	40	vdev_phys_t vl_vdev_phys; /* 112K */
	41	char vl_uberblock[VDEV_UBERBLOCK_RING]; /* 128K */
	42	} vdev_label_t; /* 256K total */
	43
	44	/*
	45	* Size and offset of embedded boot loader region on each label.
	46	* The total size of the first two labels plus the boot area is 4MB.
	47	*/
	48	#define VDEV_BOOT_OFFSET (2 * sizeof(vdev_label_t))
	49	#define VDEV_BOOT_SIZE (7ULL << 19) /* 3.5M */
	50
	51	/*
	52	* Size of label regions at the start and end of each leaf device.
	53	*/
	54	#define VDEV_LABEL_START_SIZE (2 * sizeof(vdev_label_t) + VDEV_BOOT_SIZE)
	55	#define VDEV_LABEL_END_SIZE (2 * sizeof(vdev_label_t))
	56	#define VDEV_LABELS 4
	57
	58	#endif /* _SYS_VDEV_IMPL_H */