[people/ms/u-boot.git] / include / zfs / zio.h

/*
 *  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 */
Commit	Line	Data
4d3c95f5 JL	1	/*
	2	* GRUB -- GRand Unified Bootloader
	3	* Copyright (C) 1999,2000,2001,2002,2003,2004 Free Software Foundation, Inc.
	4	*
1a459660	5	* SPDX-License-Identifier: GPL-2.0+
4d3c95f5 JL	6	*/
	7	/*
	8	* Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
	9	*/
	10
	11	#ifndef _ZIO_H
	12	#define _ZIO_H
	13
	14	#include <zfs/spa.h>
	15
	16	#define ZEC_MAGIC 0x210da7ab10c7a11ULL /* zio data bloc tail */
	17
	18	typedef struct zio_eck {
	19	uint64_t zec_magic; /* for validation, endianness */
	20	zio_cksum_t zec_cksum; /* 256-bit checksum */
	21	} zio_eck_t;
	22
	23	/*
	24	* Gang block headers are self-checksumming and contain an array
	25	* of block pointers.
	26	*/
	27	#define SPA_GANGBLOCKSIZE SPA_MINBLOCKSIZE
	28	#define SPA_GBH_NBLKPTRS ((SPA_GANGBLOCKSIZE - \
	29	sizeof(zio_eck_t)) / sizeof(blkptr_t))
	30	#define SPA_GBH_FILLER ((SPA_GANGBLOCKSIZE - \
	31	sizeof(zio_eck_t) - \
	32	(SPA_GBH_NBLKPTRS * sizeof(blkptr_t))) /\
	33	sizeof(uint64_t))
	34
	35	#define ZIO_GET_IOSIZE(zio) \
	36	(BP_IS_GANG((zio)->io_bp) ? \
	37	SPA_GANGBLOCKSIZE : BP_GET_PSIZE((zio)->io_bp))
	38
	39	typedef struct zio_gbh {
	40	blkptr_t zg_blkptr[SPA_GBH_NBLKPTRS];
	41	uint64_t zg_filler[SPA_GBH_FILLER];
	42	zio_eck_t zg_tail;
	43	} zio_gbh_phys_t;
	44
	45	enum zio_checksum {
	46	ZIO_CHECKSUM_INHERIT = 0,
	47	ZIO_CHECKSUM_ON,
	48	ZIO_CHECKSUM_OFF,
	49	ZIO_CHECKSUM_LABEL,
	50	ZIO_CHECKSUM_GANG_HEADER,
	51	ZIO_CHECKSUM_ZILOG,
	52	ZIO_CHECKSUM_FLETCHER_2,
	53	ZIO_CHECKSUM_FLETCHER_4,
	54	ZIO_CHECKSUM_SHA256,
	55	ZIO_CHECKSUM_ZILOG2,
	56	ZIO_CHECKSUM_FUNCTIONS
	57	};
	58
	59	#define ZIO_CHECKSUM_ON_VALUE ZIO_CHECKSUM_FLETCHER_2
	60	#define ZIO_CHECKSUM_DEFAULT ZIO_CHECKSUM_ON
	61
	62	enum zio_compress {
	63	ZIO_COMPRESS_INHERIT = 0,
	64	ZIO_COMPRESS_ON,
	65	ZIO_COMPRESS_OFF,
	66	ZIO_COMPRESS_LZJB,
	67	ZIO_COMPRESS_EMPTY,
	68	ZIO_COMPRESS_GZIP1,
	69	ZIO_COMPRESS_GZIP2,
70	ZIO_COMPRESS_GZIP3,
71	ZIO_COMPRESS_GZIP4,
72	ZIO_COMPRESS_GZIP5,
73	ZIO_COMPRESS_GZIP6,
74	ZIO_COMPRESS_GZIP7,
75	ZIO_COMPRESS_GZIP8,
76	ZIO_COMPRESS_GZIP9,
77	ZIO_COMPRESS_FUNCTIONS
78	};
79
80	#endif /* _ZIO_H */