2 * GRUB -- GRand Unified Bootloader
3 * Copyright (C) 1999,2000,2001,2002,2003,2004 Free Software Foundation, Inc.
5 * SPDX-License-Identifier: GPL-2.0+
8 * Copyright 2010 Sun Microsystems, Inc. All rights reserved.
9 * Use is subject to license terms.
12 #ifndef _SYS_VDEV_IMPL_H
13 #define _SYS_VDEV_IMPL_H
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)
21 #define VDEV_BOOT_MAGIC 0x2f5b007b10cULL
22 #define VDEV_BOOT_VERSION 1 /* version number */
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)];
32 typedef struct vdev_phys
{
33 char vp_nvlist
[VDEV_PHYS_SIZE
- sizeof(zio_eck_t
)];
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 */
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.
48 #define VDEV_BOOT_OFFSET (2 * sizeof(vdev_label_t))
49 #define VDEV_BOOT_SIZE (7ULL << 19) /* 3.5M */
52 * Size of label regions at the start and end of each leaf device.
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))
58 #endif /* _SYS_VDEV_IMPL_H */