arch/all-pc/boot/grub2-aros/include/grub/zfs/zio.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 _ZIO_H
  24 #define _ZIO_H
  25
  26 #include <grub/zfs/spa.h>
  27
  28 #define ZEC_MAGIC       0x210da7ab10c7a11ULL    /* zio data bloc tail */
  29
  30 typedef struct zio_eck {
  31         grub_uint64_t   zec_magic;      /* for validation, endianness   */
  32         zio_cksum_t     zec_cksum;      /* 256-bit checksum             */
  33 } __attribute__ ((packed)) zio_eck_t;
  34
  35 /*
  36  * Gang block headers are self-checksumming and contain an array
  37  * of block pointers.
  38  */
  39 #define SPA_GANGBLOCKSIZE       SPA_MINBLOCKSIZE
  40 #define SPA_GBH_NBLKPTRS        ((SPA_GANGBLOCKSIZE - \
  41         sizeof (zio_eck_t)) / sizeof (blkptr_t))
  42 #define SPA_GBH_FILLER          ((SPA_GANGBLOCKSIZE - \
  43         sizeof (zio_eck_t) - \
  44         (SPA_GBH_NBLKPTRS * sizeof (blkptr_t))) /\
  45         sizeof (grub_uint64_t))
  46
  47 #define ZIO_GET_IOSIZE(zio)     \
  48         (BP_IS_GANG((zio)->io_bp) ? \
  49         SPA_GANGBLOCKSIZE : BP_GET_PSIZE((zio)->io_bp))
  50
  51 typedef struct zio_gbh {
  52         blkptr_t                zg_blkptr[SPA_GBH_NBLKPTRS];
  53         grub_uint64_t           zg_filler[SPA_GBH_FILLER];
  54         zio_eck_t               zg_tail;
  55 } zio_gbh_phys_t;
  56
  57 enum zio_checksum {
  58         ZIO_CHECKSUM_INHERIT = 0,
  59         ZIO_CHECKSUM_ON,
  60         ZIO_CHECKSUM_OFF,
  61         ZIO_CHECKSUM_LABEL,
  62         ZIO_CHECKSUM_GANG_HEADER,
  63         ZIO_CHECKSUM_ZILOG,
  64         ZIO_CHECKSUM_FLETCHER_2,
  65         ZIO_CHECKSUM_FLETCHER_4,
  66         ZIO_CHECKSUM_SHA256,
  67         ZIO_CHECKSUM_ZILOG2,
  68         ZIO_CHECKSUM_SHA256_MAC,
  69         ZIO_CHECKSUM_FUNCTIONS
  70 };
  71
  72 #define ZIO_CHECKSUM_ON_VALUE   ZIO_CHECKSUM_FLETCHER_2
  73 #define ZIO_CHECKSUM_DEFAULT    ZIO_CHECKSUM_ON
  74
  75 enum zio_compress {
  76         ZIO_COMPRESS_INHERIT = 0,
  77         ZIO_COMPRESS_ON,
  78         ZIO_COMPRESS_OFF,
  79         ZIO_COMPRESS_LZJB,
  80         ZIO_COMPRESS_EMPTY,
  81         ZIO_COMPRESS_GZIP1,
  82         ZIO_COMPRESS_GZIP2,
  83         ZIO_COMPRESS_GZIP3,
  84         ZIO_COMPRESS_GZIP4,
  85         ZIO_COMPRESS_GZIP5,
  86         ZIO_COMPRESS_GZIP6,
  87         ZIO_COMPRESS_GZIP7,
  88         ZIO_COMPRESS_GZIP8,
  89         ZIO_COMPRESS_GZIP9,
  90         ZIO_COMPRESS_ZLE,
  91         ZIO_COMPRESS_FUNCTIONS
  92 };
  93
  94 #endif  /* _ZIO_H */