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 * Copyright 2013 by Saso Kiselkov. All rights reserved. 25 */ 26 27 #ifndef _ZIO_H 28 #define _ZIO_H 29 30 #define ZEC_MAGIC 0x210da7ab10c7a11ULL /* zio data bloc tail */ 31 32 typedef struct zio_eck { 33 uint64_t zec_magic; /* for validation, endianness */ 34 zio_cksum_t zec_cksum; /* 256-bit checksum */ 35 } zio_eck_t; 36 37 /* 38 * Gang block headers are self-checksumming and contain an array 39 * of block pointers. 40 */ 41 #define SPA_GANGBLOCKSIZE SPA_MINBLOCKSIZE 42 #define SPA_GBH_NBLKPTRS ((SPA_GANGBLOCKSIZE - \ 43 sizeof (zio_eck_t)) / sizeof (blkptr_t)) 44 #define SPA_GBH_FILLER ((SPA_GANGBLOCKSIZE - \ 45 sizeof (zio_eck_t) - \ 46 (SPA_GBH_NBLKPTRS * sizeof (blkptr_t))) /\ 47 sizeof (uint64_t)) 48 49 #define ZIO_GET_IOSIZE(zio) \ 50 (BP_IS_GANG((zio)->io_bp) ? \ 51 SPA_GANGBLOCKSIZE : BP_GET_PSIZE((zio)->io_bp)) 52 53 typedef struct zio_gbh { 54 blkptr_t zg_blkptr[SPA_GBH_NBLKPTRS]; 55 uint64_t zg_filler[SPA_GBH_FILLER]; 56 zio_eck_t zg_tail; 57 } zio_gbh_phys_t; 58 59 enum zio_checksum { 60 ZIO_CHECKSUM_INHERIT = 0, 61 ZIO_CHECKSUM_ON, 62 ZIO_CHECKSUM_OFF, 63 ZIO_CHECKSUM_LABEL, 64 ZIO_CHECKSUM_GANG_HEADER, 65 ZIO_CHECKSUM_ZILOG, 66 ZIO_CHECKSUM_FLETCHER_2, 67 ZIO_CHECKSUM_FLETCHER_4, 68 ZIO_CHECKSUM_SHA256, 69 ZIO_CHECKSUM_ZILOG2, 70 ZIO_CHECKSUM_NOPARITY, 71 ZIO_CHECKSUM_SHA512, 72 ZIO_CHECKSUM_SKEIN, 73 ZIO_CHECKSUM_EDONR, 74 ZIO_CHECKSUM_FUNCTIONS 75 }; 76 77 enum zio_compress { 78 ZIO_COMPRESS_INHERIT = 0, 79 ZIO_COMPRESS_ON, 80 ZIO_COMPRESS_OFF, 81 ZIO_COMPRESS_LZJB, 82 ZIO_COMPRESS_EMPTY, 83 ZIO_COMPRESS_GZIP_1, 84 ZIO_COMPRESS_GZIP_2, 85 ZIO_COMPRESS_GZIP_3, 86 ZIO_COMPRESS_GZIP_4, 87 ZIO_COMPRESS_GZIP_5, 88 ZIO_COMPRESS_GZIP_6, 89 ZIO_COMPRESS_GZIP_7, 90 ZIO_COMPRESS_GZIP_8, 91 ZIO_COMPRESS_GZIP_9, 92 ZIO_COMPRESS_ZLE, 93 ZIO_COMPRESS_LZ4, 94 ZIO_COMPRESS_FUNCTIONS 95 }; 96 97 #endif /* _ZIO_H */ 98