| Jorgen Lundman | 9b4a1f9 | 2012-07-19 20:48:25 +0000 | [diff] [blame^] | 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 2010 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 | #define VDEV_SKIP_SIZE (8 << 10) |
| 28 | #define VDEV_BOOT_HEADER_SIZE (8 << 10) |
| 29 | #define VDEV_PHYS_SIZE (112 << 10) |
| 30 | #define VDEV_UBERBLOCK_RING (128 << 10) |
| 31 | |
| 32 | /* ZFS boot block */ |
| 33 | #define VDEV_BOOT_MAGIC 0x2f5b007b10cULL |
| 34 | #define VDEV_BOOT_VERSION 1 /* version number */ |
| 35 | |
| 36 | typedef struct vdev_boot_header { |
| 37 | uint64_t vb_magic; /* VDEV_BOOT_MAGIC */ |
| 38 | uint64_t vb_version; /* VDEV_BOOT_VERSION */ |
| 39 | uint64_t vb_offset; /* start offset (bytes) */ |
| 40 | uint64_t vb_size; /* size (bytes) */ |
| 41 | char vb_pad[VDEV_BOOT_HEADER_SIZE - 4 * sizeof(uint64_t)]; |
| 42 | } vdev_boot_header_t; |
| 43 | |
| 44 | typedef struct vdev_phys { |
| 45 | char vp_nvlist[VDEV_PHYS_SIZE - sizeof(zio_eck_t)]; |
| 46 | zio_eck_t vp_zbt; |
| 47 | } vdev_phys_t; |
| 48 | |
| 49 | typedef struct vdev_label { |
| 50 | char vl_pad[VDEV_SKIP_SIZE]; /* 8K */ |
| 51 | vdev_boot_header_t vl_boot_header; /* 8K */ |
| 52 | vdev_phys_t vl_vdev_phys; /* 112K */ |
| 53 | char vl_uberblock[VDEV_UBERBLOCK_RING]; /* 128K */ |
| 54 | } vdev_label_t; /* 256K total */ |
| 55 | |
| 56 | /* |
| 57 | * Size and offset of embedded boot loader region on each label. |
| 58 | * The total size of the first two labels plus the boot area is 4MB. |
| 59 | */ |
| 60 | #define VDEV_BOOT_OFFSET (2 * sizeof(vdev_label_t)) |
| 61 | #define VDEV_BOOT_SIZE (7ULL << 19) /* 3.5M */ |
| 62 | |
| 63 | /* |
| 64 | * Size of label regions at the start and end of each leaf device. |
| 65 | */ |
| 66 | #define VDEV_LABEL_START_SIZE (2 * sizeof(vdev_label_t) + VDEV_BOOT_SIZE) |
| 67 | #define VDEV_LABEL_END_SIZE (2 * sizeof(vdev_label_t)) |
| 68 | #define VDEV_LABELS 4 |
| 69 | |
| 70 | #endif /* _SYS_VDEV_IMPL_H */ |