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, see <http://www.gnu.org/licenses/>. 17 */ 18 /* 19 * Copyright 2010 Sun Microsystems, Inc. All rights reserved. 20 * Use is subject to license terms. 21 */ 22 23 #ifndef _SYS_VDEV_IMPL_H 24 #define _SYS_VDEV_IMPL_H 25 26 #define VDEV_PAD_SIZE (8 << 10) 27 /* 2 padding areas (vl_pad1 and vl_pad2) to skip */ 28 #define VDEV_SKIP_SIZE VDEV_PAD_SIZE * 2 29 #define VDEV_PHYS_SIZE (112 << 10) 30 #define VDEV_UBERBLOCK_RING (128 << 10) 31 32 typedef struct vdev_phys { 33 char vp_nvlist[VDEV_PHYS_SIZE - sizeof (zio_eck_t)]; 34 zio_eck_t vp_zbt; 35 } vdev_phys_t; 36 37 typedef struct vdev_label { 38 char vl_pad1[VDEV_PAD_SIZE]; /* 8K */ 39 char vl_pad2[VDEV_PAD_SIZE]; /* 8K */ 40 vdev_phys_t vl_vdev_phys; /* 112K */ 41 char vl_uberblock[VDEV_UBERBLOCK_RING]; /* 128K */ 42 } vdev_label_t; /* 256K total */ 43 44 /* 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. 47 */ 48 #define VDEV_BOOT_OFFSET (2 * sizeof (vdev_label_t)) 49 #define VDEV_BOOT_SIZE (7ULL << 19) /* 3.5M */ 50 51 /* 52 * Size of label regions at the start and end of each leaf device. 53 */ 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)) 56 #define VDEV_LABELS 4 57 58 #endif /* _SYS_VDEV_IMPL_H */ 59