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 /* 20*6e1f5caaSNeil Perrin * Copyright 2010 Sun Microsystems, Inc. All rights reserved. 21b1b8ab34Slling * Use is subject to license terms. 22b1b8ab34Slling */ 23b1b8ab34Slling 24b1b8ab34Slling #ifndef _ZIO_H 25b1b8ab34Slling #define _ZIO_H 26b1b8ab34Slling 27*6e1f5caaSNeil Perrin #define ZEC_MAGIC 0x210da7ab10c7a11ULL /* zio data bloc tail */ 28b1b8ab34Slling 29*6e1f5caaSNeil Perrin typedef struct zio_eck { 30*6e1f5caaSNeil Perrin uint64_t zec_magic; /* for validation, endianness */ 31*6e1f5caaSNeil Perrin zio_cksum_t zec_cksum; /* 256-bit checksum */ 32*6e1f5caaSNeil Perrin } zio_eck_t; 33b1b8ab34Slling 34b1b8ab34Slling /* 35b1b8ab34Slling * Gang block headers are self-checksumming and contain an array 36b1b8ab34Slling * of block pointers. 37b1b8ab34Slling */ 38b1b8ab34Slling #define SPA_GANGBLOCKSIZE SPA_MINBLOCKSIZE 39b1b8ab34Slling #define SPA_GBH_NBLKPTRS ((SPA_GANGBLOCKSIZE - \ 40*6e1f5caaSNeil Perrin sizeof (zio_eck_t)) / sizeof (blkptr_t)) 41b1b8ab34Slling #define SPA_GBH_FILLER ((SPA_GANGBLOCKSIZE - \ 42*6e1f5caaSNeil Perrin sizeof (zio_eck_t) - \ 43b1b8ab34Slling (SPA_GBH_NBLKPTRS * sizeof (blkptr_t))) /\ 44b1b8ab34Slling sizeof (uint64_t)) 45b1b8ab34Slling 46b1b8ab34Slling #define ZIO_GET_IOSIZE(zio) \ 47b1b8ab34Slling (BP_IS_GANG((zio)->io_bp) ? \ 48b1b8ab34Slling SPA_GANGBLOCKSIZE : BP_GET_PSIZE((zio)->io_bp)) 49b1b8ab34Slling 50b1b8ab34Slling typedef struct zio_gbh { 51b1b8ab34Slling blkptr_t zg_blkptr[SPA_GBH_NBLKPTRS]; 52b1b8ab34Slling uint64_t zg_filler[SPA_GBH_FILLER]; 53*6e1f5caaSNeil Perrin zio_eck_t zg_tail; 54b1b8ab34Slling } zio_gbh_phys_t; 55b1b8ab34Slling 56b1b8ab34Slling enum zio_checksum { 57b1b8ab34Slling ZIO_CHECKSUM_INHERIT = 0, 58b1b8ab34Slling ZIO_CHECKSUM_ON, 59b1b8ab34Slling ZIO_CHECKSUM_OFF, 60b1b8ab34Slling ZIO_CHECKSUM_LABEL, 61b1b8ab34Slling ZIO_CHECKSUM_GANG_HEADER, 62b1b8ab34Slling ZIO_CHECKSUM_ZILOG, 63b1b8ab34Slling ZIO_CHECKSUM_FLETCHER_2, 64b1b8ab34Slling ZIO_CHECKSUM_FLETCHER_4, 65b1b8ab34Slling ZIO_CHECKSUM_SHA256, 66*6e1f5caaSNeil Perrin ZIO_CHECKSUM_ZILOG2, 67b1b8ab34Slling ZIO_CHECKSUM_FUNCTIONS 68b1b8ab34Slling }; 69b1b8ab34Slling 70b1b8ab34Slling enum zio_compress { 71b1b8ab34Slling ZIO_COMPRESS_INHERIT = 0, 72b1b8ab34Slling ZIO_COMPRESS_ON, 73b1b8ab34Slling ZIO_COMPRESS_OFF, 74b1b8ab34Slling ZIO_COMPRESS_LZJB, 75b1b8ab34Slling ZIO_COMPRESS_EMPTY, 76b1b8ab34Slling ZIO_COMPRESS_FUNCTIONS 77b1b8ab34Slling }; 78b1b8ab34Slling 79b1b8ab34Slling #endif /* _ZIO_H */ 80