1b1b8ab34Slling /* 2b1b8ab34Slling * GRUB -- GRand Unified Bootloader 3b1b8ab34Slling * Copyright (C) 1999,2000,2001,2002,2003,2004 Free Software Foundation, Inc. 4b1b8ab34Slling * 5b1b8ab34Slling * This program is free software; you can redistribute it and/or modify 6b1b8ab34Slling * it under the terms of the GNU General Public License as published by 7b1b8ab34Slling * the Free Software Foundation; either version 2 of the License, or 8b1b8ab34Slling * (at your option) any later version. 9b1b8ab34Slling * 10b1b8ab34Slling * This program is distributed in the hope that it will be useful, 11b1b8ab34Slling * but WITHOUT ANY WARRANTY; without even the implied warranty of 12b1b8ab34Slling * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13b1b8ab34Slling * GNU General Public License for more details. 14b1b8ab34Slling * 15b1b8ab34Slling * You should have received a copy of the GNU General Public License 16b1b8ab34Slling * along with this program; if not, write to the Free Software 17b1b8ab34Slling * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 18b1b8ab34Slling */ 19b1b8ab34Slling /* 20*b24ab676SJeff Bonwick * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 21b1b8ab34Slling * Use is subject to license terms. 22b1b8ab34Slling */ 23b1b8ab34Slling 24b1b8ab34Slling #ifndef _SYS_ZAP_IMPL_H 25b1b8ab34Slling #define _SYS_ZAP_IMPL_H 26b1b8ab34Slling 27b1b8ab34Slling #define ZAP_MAGIC 0x2F52AB2ABULL 28b1b8ab34Slling 29b1b8ab34Slling #define MZAP_ENT_LEN 64 30b1b8ab34Slling #define MZAP_NAME_LEN (MZAP_ENT_LEN - 8 - 4 - 2) 31b1b8ab34Slling #define MZAP_MAX_BLKSHIFT SPA_MAXBLOCKSHIFT 32b1b8ab34Slling #define MZAP_MAX_BLKSZ (1 << MZAP_MAX_BLKSHIFT) 33b1b8ab34Slling 34b1b8ab34Slling typedef struct mzap_ent_phys { 35b1b8ab34Slling uint64_t mze_value; 36b1b8ab34Slling uint32_t mze_cd; 37b1b8ab34Slling uint16_t mze_pad; /* in case we want to chain them someday */ 38b1b8ab34Slling char mze_name[MZAP_NAME_LEN]; 39b1b8ab34Slling } mzap_ent_phys_t; 40b1b8ab34Slling 41b1b8ab34Slling typedef struct mzap_phys { 42b1b8ab34Slling uint64_t mz_block_type; /* ZBT_MICRO */ 43b1b8ab34Slling uint64_t mz_salt; 44b1b8ab34Slling uint64_t mz_pad[6]; 45b1b8ab34Slling mzap_ent_phys_t mz_chunk[1]; 46b1b8ab34Slling /* actually variable size depending on block size */ 47b1b8ab34Slling } mzap_phys_t; 48b1b8ab34Slling 49b1b8ab34Slling /* 50b1b8ab34Slling * The (fat) zap is stored in one object. It is an array of 51b1b8ab34Slling * 1<<FZAP_BLOCK_SHIFT byte blocks. The layout looks like one of: 52b1b8ab34Slling * 53b1b8ab34Slling * ptrtbl fits in first block: 54b1b8ab34Slling * [zap_phys_t zap_ptrtbl_shift < 6] [zap_leaf_t] ... 55b1b8ab34Slling * 56b1b8ab34Slling * ptrtbl too big for first block: 57b1b8ab34Slling * [zap_phys_t zap_ptrtbl_shift >= 6] [zap_leaf_t] [ptrtbl] ... 58b1b8ab34Slling * 59b1b8ab34Slling */ 60b1b8ab34Slling 61b1b8ab34Slling #define ZBT_LEAF ((1ULL << 63) + 0) 62b1b8ab34Slling #define ZBT_HEADER ((1ULL << 63) + 1) 63b1b8ab34Slling #define ZBT_MICRO ((1ULL << 63) + 3) 64b1b8ab34Slling /* any other values are ptrtbl blocks */ 65b1b8ab34Slling 66b1b8ab34Slling /* 67b1b8ab34Slling * the embedded pointer table takes up half a block: 68b1b8ab34Slling * block size / entry size (2^3) / 2 69b1b8ab34Slling */ 70b1b8ab34Slling #define ZAP_EMBEDDED_PTRTBL_SHIFT(zap) (FZAP_BLOCK_SHIFT(zap) - 3 - 1) 71b1b8ab34Slling 72b1b8ab34Slling /* 73b1b8ab34Slling * The embedded pointer table starts half-way through the block. Since 74b1b8ab34Slling * the pointer table itself is half the block, it starts at (64-bit) 75b1b8ab34Slling * word number (1<<ZAP_EMBEDDED_PTRTBL_SHIFT(zap)). 76b1b8ab34Slling */ 77b1b8ab34Slling #define ZAP_EMBEDDED_PTRTBL_ENT(zap, idx) \ 78b1b8ab34Slling ((uint64_t *)(zap)->zap_f.zap_phys) \ 79b1b8ab34Slling [(idx) + (1<<ZAP_EMBEDDED_PTRTBL_SHIFT(zap))] 80b1b8ab34Slling 81b1b8ab34Slling /* 82b1b8ab34Slling * TAKE NOTE: 83b1b8ab34Slling * If zap_phys_t is modified, zap_byteswap() must be modified. 84b1b8ab34Slling */ 85b1b8ab34Slling typedef struct zap_phys { 86b1b8ab34Slling uint64_t zap_block_type; /* ZBT_HEADER */ 87b1b8ab34Slling uint64_t zap_magic; /* ZAP_MAGIC */ 88b1b8ab34Slling 89b1b8ab34Slling struct zap_table_phys { 90b1b8ab34Slling uint64_t zt_blk; /* starting block number */ 91b1b8ab34Slling uint64_t zt_numblks; /* number of blocks */ 92b1b8ab34Slling uint64_t zt_shift; /* bits to index it */ 93b1b8ab34Slling uint64_t zt_nextblk; /* next (larger) copy start block */ 94b1b8ab34Slling uint64_t zt_blks_copied; /* number source blocks copied */ 95b1b8ab34Slling } zap_ptrtbl; 96b1b8ab34Slling 97b1b8ab34Slling uint64_t zap_freeblk; /* the next free block */ 98b1b8ab34Slling uint64_t zap_num_leafs; /* number of leafs */ 99b1b8ab34Slling uint64_t zap_num_entries; /* number of entries */ 100b1b8ab34Slling uint64_t zap_salt; /* salt to stir into hash function */ 101*b24ab676SJeff Bonwick uint64_t zap_normflags; /* flags for u8_textprep_str() */ 102*b24ab676SJeff Bonwick uint64_t zap_flags; /* zap_flag_t */ 103b1b8ab34Slling /* 104b1b8ab34Slling * This structure is followed by padding, and then the embedded 105b1b8ab34Slling * pointer table. The embedded pointer table takes up second 106b1b8ab34Slling * half of the block. It is accessed using the 107b1b8ab34Slling * ZAP_EMBEDDED_PTRTBL_ENT() macro. 108b1b8ab34Slling */ 109b1b8ab34Slling } zap_phys_t; 110b1b8ab34Slling 111b1b8ab34Slling #endif /* _SYS_ZAP_IMPL_H */ 112