1*4d3c95f5SJorgen Lundman /* 2*4d3c95f5SJorgen Lundman * GRUB -- GRand Unified Bootloader 3*4d3c95f5SJorgen Lundman * Copyright (C) 1999,2000,2001,2002,2003,2004 Free Software Foundation, Inc. 4*4d3c95f5SJorgen Lundman * 5*4d3c95f5SJorgen Lundman * This program is free software; you can redistribute it and/or modify 6*4d3c95f5SJorgen Lundman * it under the terms of the GNU General Public License as published by 7*4d3c95f5SJorgen Lundman * the Free Software Foundation; either version 2 of the License, or 8*4d3c95f5SJorgen Lundman * (at your option) any later version. 9*4d3c95f5SJorgen Lundman * 10*4d3c95f5SJorgen Lundman * This program is distributed in the hope that it will be useful, 11*4d3c95f5SJorgen Lundman * but WITHOUT ANY WARRANTY; without even the implied warranty of 12*4d3c95f5SJorgen Lundman * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13*4d3c95f5SJorgen Lundman * GNU General Public License for more details. 14*4d3c95f5SJorgen Lundman * 15*4d3c95f5SJorgen Lundman * You should have received a copy of the GNU General Public License 16*4d3c95f5SJorgen Lundman * along with this program; if not, write to the Free Software 17*4d3c95f5SJorgen Lundman * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 18*4d3c95f5SJorgen Lundman */ 19*4d3c95f5SJorgen Lundman /* 20*4d3c95f5SJorgen Lundman * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved. 21*4d3c95f5SJorgen Lundman */ 22*4d3c95f5SJorgen Lundman 23*4d3c95f5SJorgen Lundman #ifndef _ZIO_H 24*4d3c95f5SJorgen Lundman #define _ZIO_H 25*4d3c95f5SJorgen Lundman 26*4d3c95f5SJorgen Lundman #include <zfs/spa.h> 27*4d3c95f5SJorgen Lundman 28*4d3c95f5SJorgen Lundman #define ZEC_MAGIC 0x210da7ab10c7a11ULL /* zio data bloc tail */ 29*4d3c95f5SJorgen Lundman 30*4d3c95f5SJorgen Lundman typedef struct zio_eck { 31*4d3c95f5SJorgen Lundman uint64_t zec_magic; /* for validation, endianness */ 32*4d3c95f5SJorgen Lundman zio_cksum_t zec_cksum; /* 256-bit checksum */ 33*4d3c95f5SJorgen Lundman } zio_eck_t; 34*4d3c95f5SJorgen Lundman 35*4d3c95f5SJorgen Lundman /* 36*4d3c95f5SJorgen Lundman * Gang block headers are self-checksumming and contain an array 37*4d3c95f5SJorgen Lundman * of block pointers. 38*4d3c95f5SJorgen Lundman */ 39*4d3c95f5SJorgen Lundman #define SPA_GANGBLOCKSIZE SPA_MINBLOCKSIZE 40*4d3c95f5SJorgen Lundman #define SPA_GBH_NBLKPTRS ((SPA_GANGBLOCKSIZE - \ 41*4d3c95f5SJorgen Lundman sizeof(zio_eck_t)) / sizeof(blkptr_t)) 42*4d3c95f5SJorgen Lundman #define SPA_GBH_FILLER ((SPA_GANGBLOCKSIZE - \ 43*4d3c95f5SJorgen Lundman sizeof(zio_eck_t) - \ 44*4d3c95f5SJorgen Lundman (SPA_GBH_NBLKPTRS * sizeof(blkptr_t))) /\ 45*4d3c95f5SJorgen Lundman sizeof(uint64_t)) 46*4d3c95f5SJorgen Lundman 47*4d3c95f5SJorgen Lundman #define ZIO_GET_IOSIZE(zio) \ 48*4d3c95f5SJorgen Lundman (BP_IS_GANG((zio)->io_bp) ? \ 49*4d3c95f5SJorgen Lundman SPA_GANGBLOCKSIZE : BP_GET_PSIZE((zio)->io_bp)) 50*4d3c95f5SJorgen Lundman 51*4d3c95f5SJorgen Lundman typedef struct zio_gbh { 52*4d3c95f5SJorgen Lundman blkptr_t zg_blkptr[SPA_GBH_NBLKPTRS]; 53*4d3c95f5SJorgen Lundman uint64_t zg_filler[SPA_GBH_FILLER]; 54*4d3c95f5SJorgen Lundman zio_eck_t zg_tail; 55*4d3c95f5SJorgen Lundman } zio_gbh_phys_t; 56*4d3c95f5SJorgen Lundman 57*4d3c95f5SJorgen Lundman enum zio_checksum { 58*4d3c95f5SJorgen Lundman ZIO_CHECKSUM_INHERIT = 0, 59*4d3c95f5SJorgen Lundman ZIO_CHECKSUM_ON, 60*4d3c95f5SJorgen Lundman ZIO_CHECKSUM_OFF, 61*4d3c95f5SJorgen Lundman ZIO_CHECKSUM_LABEL, 62*4d3c95f5SJorgen Lundman ZIO_CHECKSUM_GANG_HEADER, 63*4d3c95f5SJorgen Lundman ZIO_CHECKSUM_ZILOG, 64*4d3c95f5SJorgen Lundman ZIO_CHECKSUM_FLETCHER_2, 65*4d3c95f5SJorgen Lundman ZIO_CHECKSUM_FLETCHER_4, 66*4d3c95f5SJorgen Lundman ZIO_CHECKSUM_SHA256, 67*4d3c95f5SJorgen Lundman ZIO_CHECKSUM_ZILOG2, 68*4d3c95f5SJorgen Lundman ZIO_CHECKSUM_FUNCTIONS 69*4d3c95f5SJorgen Lundman }; 70*4d3c95f5SJorgen Lundman 71*4d3c95f5SJorgen Lundman #define ZIO_CHECKSUM_ON_VALUE ZIO_CHECKSUM_FLETCHER_2 72*4d3c95f5SJorgen Lundman #define ZIO_CHECKSUM_DEFAULT ZIO_CHECKSUM_ON 73*4d3c95f5SJorgen Lundman 74*4d3c95f5SJorgen Lundman enum zio_compress { 75*4d3c95f5SJorgen Lundman ZIO_COMPRESS_INHERIT = 0, 76*4d3c95f5SJorgen Lundman ZIO_COMPRESS_ON, 77*4d3c95f5SJorgen Lundman ZIO_COMPRESS_OFF, 78*4d3c95f5SJorgen Lundman ZIO_COMPRESS_LZJB, 79*4d3c95f5SJorgen Lundman ZIO_COMPRESS_EMPTY, 80*4d3c95f5SJorgen Lundman ZIO_COMPRESS_GZIP1, 81*4d3c95f5SJorgen Lundman ZIO_COMPRESS_GZIP2, 82*4d3c95f5SJorgen Lundman ZIO_COMPRESS_GZIP3, 83*4d3c95f5SJorgen Lundman ZIO_COMPRESS_GZIP4, 84*4d3c95f5SJorgen Lundman ZIO_COMPRESS_GZIP5, 85*4d3c95f5SJorgen Lundman ZIO_COMPRESS_GZIP6, 86*4d3c95f5SJorgen Lundman ZIO_COMPRESS_GZIP7, 87*4d3c95f5SJorgen Lundman ZIO_COMPRESS_GZIP8, 88*4d3c95f5SJorgen Lundman ZIO_COMPRESS_GZIP9, 89*4d3c95f5SJorgen Lundman ZIO_COMPRESS_FUNCTIONS 90*4d3c95f5SJorgen Lundman }; 91*4d3c95f5SJorgen Lundman 92*4d3c95f5SJorgen Lundman #endif /* _ZIO_H */ 93