/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 1999,2000,2001,2002,2003,2004 Free Software Foundation, Inc.
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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/*
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* Copyright 2010 Sun Microsystems, Inc. All rights reserved.
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* Use is subject to license terms.
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*/
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#ifndef _SYS_VDEV_IMPL_H
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#define _SYS_VDEV_IMPL_H
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#define VDEV_SKIP_SIZE (8 << 10)
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#define VDEV_BOOT_HEADER_SIZE (8 << 10)
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#define VDEV_PHYS_SIZE (112 << 10)
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#define VDEV_UBERBLOCK_RING (128 << 10)
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/* ZFS boot block */
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#define VDEV_BOOT_MAGIC 0x2f5b007b10cULL
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#define VDEV_BOOT_VERSION 1 /* version number */
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typedef struct vdev_boot_header {
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uint64_t vb_magic; /* VDEV_BOOT_MAGIC */
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uint64_t vb_version; /* VDEV_BOOT_VERSION */
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uint64_t vb_offset; /* start offset (bytes) */
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uint64_t vb_size; /* size (bytes) */
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char vb_pad[VDEV_BOOT_HEADER_SIZE - 4 * sizeof(uint64_t)];
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} vdev_boot_header_t;
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typedef struct vdev_phys {
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char vp_nvlist[VDEV_PHYS_SIZE - sizeof(zio_eck_t)];
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zio_eck_t vp_zbt;
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} vdev_phys_t;
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typedef struct vdev_label {
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char vl_pad[VDEV_SKIP_SIZE]; /* 8K */
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vdev_boot_header_t vl_boot_header; /* 8K */
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vdev_phys_t vl_vdev_phys; /* 112K */
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char vl_uberblock[VDEV_UBERBLOCK_RING]; /* 128K */
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} vdev_label_t; /* 256K total */
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/*
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* Size and offset of embedded boot loader region on each label.
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* The total size of the first two labels plus the boot area is 4MB.
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*/
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#define VDEV_BOOT_OFFSET (2 * sizeof(vdev_label_t))
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#define VDEV_BOOT_SIZE (7ULL << 19) /* 3.5M */
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/*
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* Size of label regions at the start and end of each leaf device.
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*/
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#define VDEV_LABEL_START_SIZE (2 * sizeof(vdev_label_t) + VDEV_BOOT_SIZE)
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#define VDEV_LABEL_END_SIZE (2 * sizeof(vdev_label_t))
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#define VDEV_LABELS 4
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#endif /* _SYS_VDEV_IMPL_H */
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