1b1b8ab34Slling /* 2b1b8ab34Slling * GRUB -- GRand Unified Bootloader 3b1b8ab34Slling * Copyright (C) 1999,2000,2001,2002,2003,2004 Free Software Foundation, Inc. 4b1b8ab34Slling * 5b1b8ab34Slling * This program is free software; you can redistribute it and/or modify 6b1b8ab34Slling * it under the terms of the GNU General Public License as published by 7b1b8ab34Slling * the Free Software Foundation; either version 2 of the License, or 8b1b8ab34Slling * (at your option) any later version. 9b1b8ab34Slling * 10b1b8ab34Slling * This program is distributed in the hope that it will be useful, 11b1b8ab34Slling * but WITHOUT ANY WARRANTY; without even the implied warranty of 12b1b8ab34Slling * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13b1b8ab34Slling * GNU General Public License for more details. 14b1b8ab34Slling * 15b1b8ab34Slling * You should have received a copy of the GNU General Public License 16b1b8ab34Slling * along with this program; if not, write to the Free Software 17b1b8ab34Slling * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 18b1b8ab34Slling */ 19b1b8ab34Slling /* 206e1f5caaSNeil Perrin * Copyright 2010 Sun Microsystems, Inc. All rights reserved. 21b1b8ab34Slling * Use is subject to license terms. 22b1b8ab34Slling */ 23b1b8ab34Slling 24b1b8ab34Slling #ifndef _SYS_VDEV_IMPL_H 25b1b8ab34Slling #define _SYS_VDEV_IMPL_H 26b1b8ab34Slling 27*81b2d573SHans Rosenfeld /* helper macros */ 28*81b2d573SHans Rosenfeld #undef offsetof 29*81b2d573SHans Rosenfeld #define offsetof(t, m) ((int)&(((t *)0)->m)) 30*81b2d573SHans Rosenfeld #define MAX(x, y) ((x) > (y) ? (x) : (y)) 31*81b2d573SHans Rosenfeld 32f83ffe1aSLin Ling #define VDEV_PAD_SIZE (8 << 10) 33f83ffe1aSLin Ling /* 2 padding areas (vl_pad1 and vl_pad2) to skip */ 34f83ffe1aSLin Ling #define VDEV_SKIP_SIZE VDEV_PAD_SIZE * 2 35b1b8ab34Slling #define VDEV_PHYS_SIZE (112 << 10) 36b1b8ab34Slling #define VDEV_UBERBLOCK_RING (128 << 10) 37b1b8ab34Slling 38*81b2d573SHans Rosenfeld #define VDEV_UBERBLOCK_SHIFT(sh) \ 39*81b2d573SHans Rosenfeld MAX((sh), UBERBLOCK_SHIFT) 40*81b2d573SHans Rosenfeld #define VDEV_UBERBLOCK_COUNT(sh) \ 41*81b2d573SHans Rosenfeld (VDEV_UBERBLOCK_RING >> VDEV_UBERBLOCK_SHIFT(sh)) 42*81b2d573SHans Rosenfeld #define VDEV_UBERBLOCK_OFFSET(sh, n) \ 43*81b2d573SHans Rosenfeld offsetof(vdev_label_t, vl_uberblock[(n) << VDEV_UBERBLOCK_SHIFT(sh)]) 44*81b2d573SHans Rosenfeld #define VDEV_UBERBLOCK_SIZE(sh) \ 45*81b2d573SHans Rosenfeld (1ULL << VDEV_UBERBLOCK_SHIFT(sh)) 46*81b2d573SHans Rosenfeld 47b1b8ab34Slling typedef struct vdev_phys { 486e1f5caaSNeil Perrin char vp_nvlist[VDEV_PHYS_SIZE - sizeof (zio_eck_t)]; 496e1f5caaSNeil Perrin zio_eck_t vp_zbt; 50b1b8ab34Slling } vdev_phys_t; 51b1b8ab34Slling 52b1b8ab34Slling typedef struct vdev_label { 53f83ffe1aSLin Ling char vl_pad1[VDEV_PAD_SIZE]; /* 8K */ 54f83ffe1aSLin Ling char vl_pad2[VDEV_PAD_SIZE]; /* 8K */ 55b1b8ab34Slling vdev_phys_t vl_vdev_phys; /* 112K */ 56b1b8ab34Slling char vl_uberblock[VDEV_UBERBLOCK_RING]; /* 128K */ 57b1b8ab34Slling } vdev_label_t; /* 256K total */ 58b1b8ab34Slling 59b1b8ab34Slling /* 60b1b8ab34Slling * Size and offset of embedded boot loader region on each label. 61b1b8ab34Slling * The total size of the first two labels plus the boot area is 4MB. 62b1b8ab34Slling */ 63b1b8ab34Slling #define VDEV_BOOT_OFFSET (2 * sizeof (vdev_label_t)) 64b1b8ab34Slling #define VDEV_BOOT_SIZE (7ULL << 19) /* 3.5M */ 65b1b8ab34Slling 66b1b8ab34Slling /* 67b1b8ab34Slling * Size of label regions at the start and end of each leaf device. 68b1b8ab34Slling */ 69b1b8ab34Slling #define VDEV_LABEL_START_SIZE (2 * sizeof (vdev_label_t) + VDEV_BOOT_SIZE) 70b1b8ab34Slling #define VDEV_LABEL_END_SIZE (2 * sizeof (vdev_label_t)) 71b1b8ab34Slling #define VDEV_LABELS 4 72b1b8ab34Slling 73b1b8ab34Slling #endif /* _SYS_VDEV_IMPL_H */ 74