1*83d290c5STom Rini /* SPDX-License-Identifier: GPL-2.0+ */ 24d3c95f5SJorgen Lundman /* 34d3c95f5SJorgen Lundman * GRUB -- GRand Unified Bootloader 44d3c95f5SJorgen Lundman * Copyright (C) 1999,2000,2001,2002,2003,2004 Free Software Foundation, Inc. 54d3c95f5SJorgen Lundman */ 64d3c95f5SJorgen Lundman /* 74d3c95f5SJorgen Lundman * Copyright 2010 Sun Microsystems, Inc. All rights reserved. 84d3c95f5SJorgen Lundman * Use is subject to license terms. 94d3c95f5SJorgen Lundman */ 104d3c95f5SJorgen Lundman 114d3c95f5SJorgen Lundman #ifndef _SYS_VDEV_IMPL_H 124d3c95f5SJorgen Lundman #define _SYS_VDEV_IMPL_H 134d3c95f5SJorgen Lundman 144d3c95f5SJorgen Lundman #define VDEV_SKIP_SIZE (8 << 10) 154d3c95f5SJorgen Lundman #define VDEV_BOOT_HEADER_SIZE (8 << 10) 164d3c95f5SJorgen Lundman #define VDEV_PHYS_SIZE (112 << 10) 174d3c95f5SJorgen Lundman #define VDEV_UBERBLOCK_RING (128 << 10) 184d3c95f5SJorgen Lundman 194d3c95f5SJorgen Lundman /* ZFS boot block */ 204d3c95f5SJorgen Lundman #define VDEV_BOOT_MAGIC 0x2f5b007b10cULL 214d3c95f5SJorgen Lundman #define VDEV_BOOT_VERSION 1 /* version number */ 224d3c95f5SJorgen Lundman 234d3c95f5SJorgen Lundman typedef struct vdev_boot_header { 244d3c95f5SJorgen Lundman uint64_t vb_magic; /* VDEV_BOOT_MAGIC */ 254d3c95f5SJorgen Lundman uint64_t vb_version; /* VDEV_BOOT_VERSION */ 264d3c95f5SJorgen Lundman uint64_t vb_offset; /* start offset (bytes) */ 274d3c95f5SJorgen Lundman uint64_t vb_size; /* size (bytes) */ 284d3c95f5SJorgen Lundman char vb_pad[VDEV_BOOT_HEADER_SIZE - 4 * sizeof(uint64_t)]; 294d3c95f5SJorgen Lundman } vdev_boot_header_t; 304d3c95f5SJorgen Lundman 314d3c95f5SJorgen Lundman typedef struct vdev_phys { 324d3c95f5SJorgen Lundman char vp_nvlist[VDEV_PHYS_SIZE - sizeof(zio_eck_t)]; 334d3c95f5SJorgen Lundman zio_eck_t vp_zbt; 344d3c95f5SJorgen Lundman } vdev_phys_t; 354d3c95f5SJorgen Lundman 364d3c95f5SJorgen Lundman typedef struct vdev_label { 374d3c95f5SJorgen Lundman char vl_pad[VDEV_SKIP_SIZE]; /* 8K */ 384d3c95f5SJorgen Lundman vdev_boot_header_t vl_boot_header; /* 8K */ 394d3c95f5SJorgen Lundman vdev_phys_t vl_vdev_phys; /* 112K */ 404d3c95f5SJorgen Lundman char vl_uberblock[VDEV_UBERBLOCK_RING]; /* 128K */ 414d3c95f5SJorgen Lundman } vdev_label_t; /* 256K total */ 424d3c95f5SJorgen Lundman 434d3c95f5SJorgen Lundman /* 444d3c95f5SJorgen Lundman * Size and offset of embedded boot loader region on each label. 454d3c95f5SJorgen Lundman * The total size of the first two labels plus the boot area is 4MB. 464d3c95f5SJorgen Lundman */ 474d3c95f5SJorgen Lundman #define VDEV_BOOT_OFFSET (2 * sizeof(vdev_label_t)) 484d3c95f5SJorgen Lundman #define VDEV_BOOT_SIZE (7ULL << 19) /* 3.5M */ 494d3c95f5SJorgen Lundman 504d3c95f5SJorgen Lundman /* 514d3c95f5SJorgen Lundman * Size of label regions at the start and end of each leaf device. 524d3c95f5SJorgen Lundman */ 534d3c95f5SJorgen Lundman #define VDEV_LABEL_START_SIZE (2 * sizeof(vdev_label_t) + VDEV_BOOT_SIZE) 544d3c95f5SJorgen Lundman #define VDEV_LABEL_END_SIZE (2 * sizeof(vdev_label_t)) 554d3c95f5SJorgen Lundman #define VDEV_LABELS 4 564d3c95f5SJorgen Lundman 574d3c95f5SJorgen Lundman #endif /* _SYS_VDEV_IMPL_H */ 58