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/*
* 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 */
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