1 /* 2 * GRUB -- GRand Unified Bootloader 3 * Copyright (C) 1999,2000,2001,2002,2003,2004 Free Software Foundation, Inc. 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation; either version 2 of the License, or 8 * (at your option) any later version. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, write to the Free Software 17 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 18 */ 19 /* 20 * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 21 * Use is subject to license terms. 22 */ 23 24 #ifndef _SYS_VDEV_IMPL_H 25 #define _SYS_VDEV_IMPL_H 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 #define VDEV_SKIP_SIZE (8 << 10) 30 #define VDEV_BOOT_HEADER_SIZE (8 << 10) 31 #define VDEV_PHYS_SIZE (112 << 10) 32 #define VDEV_UBERBLOCK_RING (128 << 10) 33 34 /* ZFS boot block */ 35 #define VDEV_BOOT_MAGIC 0x2f5b007b10cULL 36 #define VDEV_BOOT_VERSION 1 /* version number */ 37 38 typedef struct vdev_boot_header { 39 uint64_t vb_magic; /* VDEV_BOOT_MAGIC */ 40 uint64_t vb_version; /* VDEV_BOOT_VERSION */ 41 uint64_t vb_offset; /* start offset (bytes) */ 42 uint64_t vb_size; /* size (bytes) */ 43 char vb_pad[VDEV_BOOT_HEADER_SIZE - 4 * sizeof (uint64_t)]; 44 } vdev_boot_header_t; 45 46 typedef struct vdev_phys { 47 char vp_nvlist[VDEV_PHYS_SIZE - sizeof (zio_block_tail_t)]; 48 zio_block_tail_t vp_zbt; 49 } vdev_phys_t; 50 51 typedef struct vdev_label { 52 char vl_pad[VDEV_SKIP_SIZE]; /* 8K */ 53 vdev_boot_header_t vl_boot_header; /* 8K */ 54 vdev_phys_t vl_vdev_phys; /* 112K */ 55 char vl_uberblock[VDEV_UBERBLOCK_RING]; /* 128K */ 56 } vdev_label_t; /* 256K total */ 57 58 /* 59 * Size and offset of embedded boot loader region on each label. 60 * The total size of the first two labels plus the boot area is 4MB. 61 */ 62 #define VDEV_BOOT_OFFSET (2 * sizeof (vdev_label_t)) 63 #define VDEV_BOOT_SIZE (7ULL << 19) /* 3.5M */ 64 65 /* 66 * Size of label regions at the start and end of each leaf device. 67 */ 68 #define VDEV_LABEL_START_SIZE (2 * sizeof (vdev_label_t) + VDEV_BOOT_SIZE) 69 #define VDEV_LABEL_END_SIZE (2 * sizeof (vdev_label_t)) 70 #define VDEV_LABELS 4 71 72 #endif /* _SYS_VDEV_IMPL_H */ 73