1 /* 2 * GRUB -- GRand Unified Bootloader 3 * Copyright (C) 1999,2000,2001,2002,2003,2004 Free Software Foundation, Inc. 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation; either version 2 of the License, or 8 * (at your option) any later version. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, write to the Free Software 17 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 18 */ 19 /* 20 * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 21 * Use is subject to license terms. 22 */ 23 #ifndef _FSYS_ZFS_H 24 #define _FSYS_ZFS_H 25 26 #pragma ident "%Z%%M% %I% %E% SMI" 27 28 #ifdef FSYS_ZFS 29 30 typedef unsigned long long uint64_t; 31 typedef unsigned int uint32_t; 32 typedef unsigned short uint16_t; 33 typedef unsigned char uint8_t; 34 typedef unsigned char uchar_t; 35 36 #if defined(_LP64) || defined(_I32LPx) 37 typedef unsigned long size_t; 38 #else 39 typedef unsigned int size_t; 40 #endif 41 42 #include <zfs-include/zfs.h> 43 #include <zfs-include/dmu.h> 44 #include <zfs-include/spa.h> 45 #include <zfs-include/zio.h> 46 #include <zfs-include/zio_checksum.h> 47 #include <zfs-include/vdev_impl.h> 48 #include <zfs-include/zap_impl.h> 49 #include <zfs-include/zap_leaf.h> 50 #include <zfs-include/uberblock_impl.h> 51 #include <zfs-include/dnode.h> 52 #include <zfs-include/dsl_dir.h> 53 #include <zfs-include/zfs_acl.h> 54 #include <zfs-include/zfs_znode.h> 55 #include <zfs-include/dsl_dataset.h> 56 #include <zfs-include/zil.h> 57 #include <zfs-include/dmu_objset.h> 58 59 /* 60 * Global Memory addresses to store MOS and DNODE data 61 */ 62 #define MOS ((dnode_phys_t *)\ 63 (RAW_ADDR((mbi.mem_upper << 10) + 0x100000) - ZFS_SCRATCH_SIZE)) 64 #define DNODE (MOS+1) /* move sizeof(dnode_phys_t) bytes */ 65 #define ZFS_SCRATCH ((char *)(DNODE+1)) 66 67 /* 68 * Verify dnode type. 69 * Can only be used in functions returning non-0 for failure. 70 */ 71 #define VERIFY_DN_TYPE(dnp, type) \ 72 if (type && (dnp)->dn_type != type) { \ 73 return (ERR_FSYS_CORRUPT); \ 74 } 75 76 /* 77 * Verify object set type. 78 * Can only be used in functions returning 0 for failure. 79 */ 80 #define VERIFY_OS_TYPE(osp, type) \ 81 if (type && (osp)->os_type != type) { \ 82 errnum = ERR_FSYS_CORRUPT; \ 83 return (0); \ 84 } 85 86 #define ZPOOL_PROP_BOOTFS "bootfs" 87 88 /* General macros */ 89 #define BSWAP_8(x) ((x) & 0xff) 90 #define BSWAP_16(x) ((BSWAP_8(x) << 8) | BSWAP_8((x) >> 8)) 91 #define BSWAP_32(x) ((BSWAP_16(x) << 16) | BSWAP_16((x) >> 16)) 92 #define BSWAP_64(x) ((BSWAP_32(x) << 32) | BSWAP_32((x) >> 32)) 93 #define P2ROUNDUP(x, align) (-(-(x) & -(align))) 94 95 /* 96 * XXX Match these macro up with real zfs once we have nvlist support so that we 97 * can support large sector disks. 98 */ 99 #define UBERBLOCK_SIZE (1ULL << UBERBLOCK_SHIFT) 100 #undef offsetof 101 #define offsetof(t, m) ((int)&(((t *)0)->m)) 102 #define VDEV_UBERBLOCK_SHIFT UBERBLOCK_SHIFT 103 #define VDEV_UBERBLOCK_OFFSET(n) \ 104 offsetof(vdev_label_t, vl_uberblock[(n) << VDEV_UBERBLOCK_SHIFT]) 105 106 typedef struct uberblock uberblock_t; 107 108 /* XXX Uberblock_phys_t is no longer in the kernel zfs */ 109 typedef struct uberblock_phys { 110 uberblock_t ubp_uberblock; 111 char ubp_pad[UBERBLOCK_SIZE - sizeof (uberblock_t) - 112 sizeof (zio_block_tail_t)]; 113 zio_block_tail_t ubp_zbt; 114 } uberblock_phys_t; 115 116 /* 117 * Macros to get fields in a bp or DVA. 118 */ 119 #define P2PHASE(x, align) ((x) & ((align) - 1)) 120 #define DVA_OFFSET_TO_PHYS_SECTOR(offset) \ 121 ((offset + VDEV_LABEL_START_SIZE) >> SPA_MINBLOCKSHIFT) 122 123 /* 124 * For nvlist manipulation. (from nvpair.h) 125 */ 126 #define NV_ENCODE_NATIVE 0 127 #define NV_ENCODE_XDR 1 128 #define HOST_ENDIAN 1 /* for x86 machine */ 129 #define DATA_TYPE_UINT64 8 130 #define DATA_TYPE_STRING 9 131 132 /* 133 * Decompression Entry - lzjb 134 */ 135 #ifndef NBBY 136 #define NBBY 8 137 #endif 138 139 typedef int zfs_decomp_func_t(void *s_start, void *d_start, size_t s_len, 140 size_t d_len); 141 typedef struct decomp_entry { 142 char *name; 143 zfs_decomp_func_t *decomp_func; 144 } decomp_entry_t; 145 146 /* 147 * FAT ZAP data structures 148 */ 149 #define ZFS_CRC64_POLY 0xC96C5795D7870F42ULL /* ECMA-182, reflected form */ 150 #define ZAP_HASH_IDX(hash, n) (((n) == 0) ? 0 : ((hash) >> (64 - (n)))) 151 #define CHAIN_END 0xffff /* end of the chunk chain */ 152 153 /* 154 * The amount of space within the chunk available for the array is: 155 * chunk size - space for type (1) - space for next pointer (2) 156 */ 157 #define ZAP_LEAF_ARRAY_BYTES (ZAP_LEAF_CHUNKSIZE - 3) 158 159 #define ZAP_LEAF_HASH_SHIFT(bs) (bs - 5) 160 #define ZAP_LEAF_HASH_NUMENTRIES(bs) (1 << ZAP_LEAF_HASH_SHIFT(bs)) 161 #define LEAF_HASH(bs, h) \ 162 ((ZAP_LEAF_HASH_NUMENTRIES(bs)-1) & \ 163 ((h) >> (64 - ZAP_LEAF_HASH_SHIFT(bs)-l->l_hdr.lh_prefix_len))) 164 165 /* 166 * The amount of space available for chunks is: 167 * block size shift - hash entry size (2) * number of hash 168 * entries - header space (2*chunksize) 169 */ 170 #define ZAP_LEAF_NUMCHUNKS(bs) \ 171 (((1<<bs) - 2*ZAP_LEAF_HASH_NUMENTRIES(bs)) / \ 172 ZAP_LEAF_CHUNKSIZE - 2) 173 174 /* 175 * The chunks start immediately after the hash table. The end of the 176 * hash table is at l_hash + HASH_NUMENTRIES, which we simply cast to a 177 * chunk_t. 178 */ 179 #define ZAP_LEAF_CHUNK(l, bs, idx) \ 180 ((zap_leaf_chunk_t *)(l->l_hash + ZAP_LEAF_HASH_NUMENTRIES(bs)))[idx] 181 #define ZAP_LEAF_ENTRY(l, bs, idx) (&ZAP_LEAF_CHUNK(l, bs, idx).l_entry) 182 183 extern void fletcher_2_native(const void *, uint64_t, zio_cksum_t *); 184 extern void fletcher_2_byteswap(const void *, uint64_t, zio_cksum_t *); 185 extern void fletcher_4_native(const void *, uint64_t, zio_cksum_t *); 186 extern void fletcher_4_byteswap(const void *, uint64_t, zio_cksum_t *); 187 extern void zio_checksum_SHA256(const void *, uint64_t, zio_cksum_t *); 188 extern int lzjb_decompress(void *, void *, size_t, size_t); 189 190 #endif /* FSYS_ZFS */ 191 192 #endif /* !_FSYS_ZFS_H */ 193