arch/all-pc/boot/grub2-aros/include/grub/zfs/vdev_impl.h

   1 /*
   2  *  GRUB  --  GRand Unified Bootloader
   3  *  Copyright (C) 1999,2000,2001,2002,2003,2004  Free Software Foundation, Inc.
   4  *
   5  *  GRUB 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 3 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  GRUB 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 GRUB.  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_SKIP_SIZE          (8 << 10)
  27 #define VDEV_BOOT_HEADER_SIZE   (8 << 10)
  28 #define VDEV_PHYS_SIZE          (112 << 10)
  29 #define VDEV_UBERBLOCK_RING     (128 << 10)
  30
  31 /* ZFS boot block */
  32 #define VDEV_BOOT_MAGIC         0x2f5b007b10cULL
  33 #define VDEV_BOOT_VERSION       1               /* version number       */
  34
  35 typedef struct vdev_boot_header {
  36         grub_uint64_t   vb_magic;               /* VDEV_BOOT_MAGIC      */
  37         grub_uint64_t   vb_version;             /* VDEV_BOOT_VERSION    */
  38         grub_uint64_t   vb_offset;              /* start offset (bytes) */
  39         grub_uint64_t   vb_size;                /* size (bytes)         */
  40         char            vb_pad[VDEV_BOOT_HEADER_SIZE - 4 * sizeof (grub_uint64_t)];
  41 } vdev_boot_header_t;
  42
  43 typedef struct vdev_phys {
  44         char            vp_nvlist[VDEV_PHYS_SIZE - sizeof (zio_eck_t)];
  45         zio_eck_t       vp_zbt;
  46 } vdev_phys_t;
  47
  48 typedef struct vdev_label {
  49         char            vl_pad[VDEV_SKIP_SIZE];                 /*   8K */
  50         vdev_boot_header_t vl_boot_header;                      /*   8K */
  51         vdev_phys_t     vl_vdev_phys;                           /* 112K */
  52         char            vl_uberblock[VDEV_UBERBLOCK_RING];      /* 128K */
  53 } vdev_label_t;                                                 /* 256K total */
  54
  55 /*
  56  * Size and offset of embedded boot loader region on each label.
  57  * The total size of the first two labels plus the boot area is 4MB.
  58  */
  59 #define VDEV_BOOT_OFFSET        (2 * sizeof (vdev_label_t))
  60 #define VDEV_BOOT_SIZE          (7ULL << 19)                    /* 3.5M */
  61
  62 /*
  63  * Size of label regions at the start and end of each leaf device.
  64  */
  65 #define VDEV_LABEL_START_SIZE   (2 * sizeof (vdev_label_t) + VDEV_BOOT_SIZE)
  66 #define VDEV_LABEL_END_SIZE     (2 * sizeof (vdev_label_t))
  67 #define VDEV_LABELS             4
  68
  69 #endif  /* _SYS_VDEV_IMPL_H */