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