mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-05 10:46:15 +09:00
4d3c95f5ea
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>
82 lines
2.8 KiB
C
82 lines
2.8 KiB
C
/*
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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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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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/*
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* Copyright 2010 Sun Microsystems, Inc. All rights reserved.
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* Use is subject to license terms.
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*/
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#ifndef _SYS_DNODE_H
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#define _SYS_DNODE_H
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#include <zfs/spa.h>
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/*
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* Fixed constants.
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*/
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#define DNODE_SHIFT 9 /* 512 bytes */
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#define DN_MIN_INDBLKSHIFT 10 /* 1k */
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#define DN_MAX_INDBLKSHIFT 14 /* 16k */
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#define DNODE_BLOCK_SHIFT 14 /* 16k */
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#define DNODE_CORE_SIZE 64 /* 64 bytes for dnode sans blkptrs */
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#define DN_MAX_OBJECT_SHIFT 48 /* 256 trillion (zfs_fid_t limit) */
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#define DN_MAX_OFFSET_SHIFT 64 /* 2^64 bytes in a dnode */
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/*
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* Derived constants.
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*/
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#define DNODE_SIZE (1 << DNODE_SHIFT)
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#define DN_MAX_NBLKPTR ((DNODE_SIZE - DNODE_CORE_SIZE) >> SPA_BLKPTRSHIFT)
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#define DN_MAX_BONUSLEN (DNODE_SIZE - DNODE_CORE_SIZE - (1 << SPA_BLKPTRSHIFT))
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#define DN_MAX_OBJECT (1ULL << DN_MAX_OBJECT_SHIFT)
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#define DNODES_PER_BLOCK_SHIFT (DNODE_BLOCK_SHIFT - DNODE_SHIFT)
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#define DNODES_PER_BLOCK (1ULL << DNODES_PER_BLOCK_SHIFT)
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#define DNODES_PER_LEVEL_SHIFT (DN_MAX_INDBLKSHIFT - SPA_BLKPTRSHIFT)
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#define DNODE_FLAG_SPILL_BLKPTR (1<<2)
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#define DN_BONUS(dnp) ((void *)((dnp)->dn_bonus + \
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(((dnp)->dn_nblkptr - 1) * sizeof(blkptr_t))))
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typedef struct dnode_phys {
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uint8_t dn_type; /* dmu_object_type_t */
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uint8_t dn_indblkshift; /* ln2(indirect block size) */
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uint8_t dn_nlevels; /* 1=dn_blkptr->data blocks */
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uint8_t dn_nblkptr; /* length of dn_blkptr */
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uint8_t dn_bonustype; /* type of data in bonus buffer */
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uint8_t dn_checksum; /* ZIO_CHECKSUM type */
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uint8_t dn_compress; /* ZIO_COMPRESS type */
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uint8_t dn_flags; /* DNODE_FLAG_* */
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uint16_t dn_datablkszsec; /* data block size in 512b sectors */
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uint16_t dn_bonuslen; /* length of dn_bonus */
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uint8_t dn_pad2[4];
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/* accounting is protected by dn_dirty_mtx */
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uint64_t dn_maxblkid; /* largest allocated block ID */
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uint64_t dn_used; /* bytes (or sectors) of disk space */
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uint64_t dn_pad3[4];
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blkptr_t dn_blkptr[1];
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uint8_t dn_bonus[DN_MAX_BONUSLEN - sizeof(blkptr_t)];
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blkptr_t dn_spill;
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} dnode_phys_t;
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#endif /* _SYS_DNODE_H */
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