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 /* helper macros */ 28 #undef offsetof 29 #define offsetof(t, m) ((int)&(((t *)0)->m)) 30 #define MAX(x, y) ((x) > (y) ? (x) : (y)) 31 32 #define VDEV_PAD_SIZE (8 << 10) 33 /* 2 padding areas (vl_pad1 and vl_pad2) to skip */ 34 #define VDEV_SKIP_SIZE VDEV_PAD_SIZE * 2 35 #define VDEV_PHYS_SIZE (112 << 10) 36 #define VDEV_UBERBLOCK_RING (128 << 10) 37 38 #define VDEV_UBERBLOCK_SHIFT(sh) \ 39 MAX((sh), UBERBLOCK_SHIFT) 40 #define VDEV_UBERBLOCK_COUNT(sh) \ 41 (VDEV_UBERBLOCK_RING >> VDEV_UBERBLOCK_SHIFT(sh)) 42 #define VDEV_UBERBLOCK_OFFSET(sh, n) \ 43 offsetof(vdev_label_t, vl_uberblock[(n) << VDEV_UBERBLOCK_SHIFT(sh)]) 44 #define VDEV_UBERBLOCK_SIZE(sh) \ 45 (1ULL << VDEV_UBERBLOCK_SHIFT(sh)) 46 47 typedef struct vdev_phys { 48 char vp_nvlist[VDEV_PHYS_SIZE - sizeof (zio_eck_t)]; 49 zio_eck_t vp_zbt; 50 } vdev_phys_t; 51 52 typedef struct vdev_label { 53 char vl_pad1[VDEV_PAD_SIZE]; /* 8K */ 54 char vl_pad2[VDEV_PAD_SIZE]; /* 8K */ 55 vdev_phys_t vl_vdev_phys; /* 112K */ 56 char vl_uberblock[VDEV_UBERBLOCK_RING]; /* 128K */ 57 } vdev_label_t; /* 256K total */ 58 59 /* 60 * Size and offset of embedded boot loader region on each label. 61 * The total size of the first two labels plus the boot area is 4MB. 62 */ 63 #define VDEV_BOOT_OFFSET (2 * sizeof (vdev_label_t)) 64 #define VDEV_BOOT_SIZE (7ULL << 19) /* 3.5M */ 65 66 /* 67 * Size of label regions at the start and end of each leaf device. 68 */ 69 #define VDEV_LABEL_START_SIZE (2 * sizeof (vdev_label_t) + VDEV_BOOT_SIZE) 70 #define VDEV_LABEL_END_SIZE (2 * sizeof (vdev_label_t)) 71 #define VDEV_LABELS 4 72 73 #endif /* _SYS_VDEV_IMPL_H */ 74