u-boot/include/zfs/zio.h
Jorgen Lundman 4d3c95f5ea zfs: Add ZFS filesystem support
U-Boot port is based on sources forked from GRUB-0.97 by Sun in 2004,
which can be found here:
http://src.opensolaris.org/source/xref/onnv/onnv-gate/usr/src/grub/grub-0.97/stage2/zfs-include/zfs.h

Released by Sun for GRUB under the license:
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
  *  the Free Software Foundation; either version 2 of the License, or
  *  (at your option) any later version.

GRUB official releases include ZFS in version:
ftp://alpha.gnu.org/gnu/grub/grub-1.99~rc1.tar.gz

And patched against GRUB Bazaar repository for ashift fixes (4KB HDDs)
more conveniently found at github:
e7b6ef3ac3

Signed-off-by: Jorgen Lundman <lundman@lundman.net>
2012-08-09 23:42:20 +02:00

92 lines
2.5 KiB
C

/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 1999,2000,2001,2002,2003,2004 Free Software Foundation, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/*
* 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 */