mirror of
https://github.com/smaeul/u-boot.git
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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>
104 lines
3.3 KiB
C
104 lines
3.3 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 2007 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_ZAP_LEAF_H
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#define _SYS_ZAP_LEAF_H
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#define ZAP_LEAF_MAGIC 0x2AB1EAF
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/* chunk size = 24 bytes */
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#define ZAP_LEAF_CHUNKSIZE 24
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/*
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* The amount of space within the chunk available for the array is:
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* chunk size - space for type (1) - space for next pointer (2)
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*/
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#define ZAP_LEAF_ARRAY_BYTES (ZAP_LEAF_CHUNKSIZE - 3)
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typedef enum zap_chunk_type {
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ZAP_CHUNK_FREE = 253,
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ZAP_CHUNK_ENTRY = 252,
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ZAP_CHUNK_ARRAY = 251,
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ZAP_CHUNK_TYPE_MAX = 250
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} zap_chunk_type_t;
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/*
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* TAKE NOTE:
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* If zap_leaf_phys_t is modified, zap_leaf_byteswap() must be modified.
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*/
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typedef struct zap_leaf_phys {
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struct zap_leaf_header {
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uint64_t lh_block_type; /* ZBT_LEAF */
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uint64_t lh_pad1;
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uint64_t lh_prefix; /* hash prefix of this leaf */
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uint32_t lh_magic; /* ZAP_LEAF_MAGIC */
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uint16_t lh_nfree; /* number free chunks */
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uint16_t lh_nentries; /* number of entries */
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uint16_t lh_prefix_len; /* num bits used to id this */
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/* above is accessable to zap, below is zap_leaf private */
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uint16_t lh_freelist; /* chunk head of free list */
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uint8_t lh_pad2[12];
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} l_hdr; /* 2 24-byte chunks */
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/*
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* The header is followed by a hash table with
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* ZAP_LEAF_HASH_NUMENTRIES(zap) entries. The hash table is
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* followed by an array of ZAP_LEAF_NUMCHUNKS(zap)
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* zap_leaf_chunk structures. These structures are accessed
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* with the ZAP_LEAF_CHUNK() macro.
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*/
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uint16_t l_hash[1];
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} zap_leaf_phys_t;
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typedef union zap_leaf_chunk {
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struct zap_leaf_entry {
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uint8_t le_type; /* always ZAP_CHUNK_ENTRY */
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uint8_t le_int_size; /* size of ints */
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uint16_t le_next; /* next entry in hash chain */
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uint16_t le_name_chunk; /* first chunk of the name */
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uint16_t le_name_length; /* bytes in name, incl null */
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uint16_t le_value_chunk; /* first chunk of the value */
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uint16_t le_value_length; /* value length in ints */
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uint32_t le_cd; /* collision differentiator */
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uint64_t le_hash; /* hash value of the name */
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} l_entry;
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struct zap_leaf_array {
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uint8_t la_type; /* always ZAP_CHUNK_ARRAY */
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union {
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uint8_t la_array[ZAP_LEAF_ARRAY_BYTES];
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uint64_t la_array64;
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} __attribute__ ((packed));
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uint16_t la_next; /* next blk or CHAIN_END */
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} l_array;
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struct zap_leaf_free {
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uint8_t lf_type; /* always ZAP_CHUNK_FREE */
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uint8_t lf_pad[ZAP_LEAF_ARRAY_BYTES];
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uint16_t lf_next; /* next in free list, or CHAIN_END */
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} l_free;
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} zap_leaf_chunk_t;
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#endif /* _SYS_ZAP_LEAF_H */
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