/* * GRUB -- GRand Unified Bootloader * Copyright (C) 1999,2000,2001,2002,2003,2004 Free Software Foundation, Inc. * * SPDX-License-Identifier: GPL-2.0+ */ /* * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved. */ #ifndef _ZIO_H #define _ZIO_H #include <zfs/spa.h> #define ZEC_MAGIC 0x210da7ab10c7a11ULL /* zio data bloc tail */ typedef struct zio_eck { uint64_t zec_magic; /* for validation, endianness */ zio_cksum_t zec_cksum; /* 256-bit checksum */ } zio_eck_t; /* * Gang block headers are self-checksumming and contain an array * of block pointers. */ #define SPA_GANGBLOCKSIZE SPA_MINBLOCKSIZE #define SPA_GBH_NBLKPTRS ((SPA_GANGBLOCKSIZE - \ sizeof(zio_eck_t)) / sizeof(blkptr_t)) #define SPA_GBH_FILLER ((SPA_GANGBLOCKSIZE - \ sizeof(zio_eck_t) - \ (SPA_GBH_NBLKPTRS * sizeof(blkptr_t))) /\ sizeof(uint64_t)) #define ZIO_GET_IOSIZE(zio) \ (BP_IS_GANG((zio)->io_bp) ? \ SPA_GANGBLOCKSIZE : BP_GET_PSIZE((zio)->io_bp)) typedef struct zio_gbh { blkptr_t zg_blkptr[SPA_GBH_NBLKPTRS]; uint64_t zg_filler[SPA_GBH_FILLER]; zio_eck_t zg_tail; } zio_gbh_phys_t; enum zio_checksum { ZIO_CHECKSUM_INHERIT = 0, ZIO_CHECKSUM_ON, ZIO_CHECKSUM_OFF, ZIO_CHECKSUM_LABEL, ZIO_CHECKSUM_GANG_HEADER, ZIO_CHECKSUM_ZILOG, ZIO_CHECKSUM_FLETCHER_2, ZIO_CHECKSUM_FLETCHER_4, ZIO_CHECKSUM_SHA256, ZIO_CHECKSUM_ZILOG2, ZIO_CHECKSUM_FUNCTIONS }; #define ZIO_CHECKSUM_ON_VALUE ZIO_CHECKSUM_FLETCHER_2 #define ZIO_CHECKSUM_DEFAULT ZIO_CHECKSUM_ON enum zio_compress { ZIO_COMPRESS_INHERIT = 0, ZIO_COMPRESS_ON, ZIO_COMPRESS_OFF, ZIO_COMPRESS_LZJB, ZIO_COMPRESS_EMPTY, ZIO_COMPRESS_GZIP1, ZIO_COMPRESS_GZIP2, ZIO_COMPRESS_GZIP3, ZIO_COMPRESS_GZIP4, ZIO_COMPRESS_GZIP5, ZIO_COMPRESS_GZIP6, ZIO_COMPRESS_GZIP7, ZIO_COMPRESS_GZIP8, ZIO_COMPRESS_GZIP9, ZIO_COMPRESS_FUNCTIONS }; #endif /* _ZIO_H */