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 2009 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 #ifdef FSYS_ZFS 27 28 typedef unsigned long long uint64_t; 29 typedef unsigned int uint32_t; 30 typedef unsigned short uint16_t; 31 typedef unsigned char uint8_t; 32 typedef unsigned char uchar_t; 33 34 #if defined(_LP64) || defined(_I32LPx) 35 typedef unsigned long size_t; 36 #else 37 typedef unsigned int size_t; 38 #endif 39 40 #include <zfs-include/zfs.h> 41 #include <zfs-include/dmu.h> 42 #include <zfs-include/spa.h> 43 #include <zfs-include/zio.h> 44 #include <zfs-include/zio_checksum.h> 45 #include <zfs-include/vdev_impl.h> 46 #include <zfs-include/zap_impl.h> 47 #include <zfs-include/zap_leaf.h> 48 #include <zfs-include/uberblock_impl.h> 49 #include <zfs-include/dnode.h> 50 #include <zfs-include/dsl_dir.h> 51 #include <zfs-include/zfs_acl.h> 52 #include <zfs-include/zfs_znode.h> 53 #include <zfs-include/dsl_dataset.h> 54 #include <zfs-include/zil.h> 55 #include <zfs-include/dmu_objset.h> 56 57 /* 58 * Global Memory addresses to store MOS and DNODE data 59 */ 60 #define MOS ((dnode_phys_t *)\ 61 (RAW_ADDR((mbi.mem_upper << 10) + 0x100000) - ZFS_SCRATCH_SIZE)) 62 #define DNODE (MOS+1) /* move sizeof(dnode_phys_t) bytes */ 63 #define ZFS_SCRATCH ((char *)(DNODE+1)) 64 65 /* 66 * Verify dnode type. 67 * Can only be used in functions returning non-0 for failure. 68 */ 69 #define VERIFY_DN_TYPE(dnp, type) \ 70 if (type && (dnp)->dn_type != type) { \ 71 return (ERR_FSYS_CORRUPT); \ 72 } 73 74 /* 75 * Verify object set type. 76 * Can only be used in functions returning 0 for failure. 77 */ 78 #define VERIFY_OS_TYPE(osp, type) \ 79 if (type && (osp)->os_type != type) { \ 80 errnum = ERR_FSYS_CORRUPT; \ 81 return (0); \ 82 } 83 84 #define ZPOOL_PROP_BOOTFS "bootfs" 85 86 /* General macros */ 87 #define BSWAP_8(x) ((x) & 0xff) 88 #define BSWAP_16(x) ((BSWAP_8(x) << 8) | BSWAP_8((x) >> 8)) 89 #define BSWAP_32(x) ((BSWAP_16(x) << 16) | BSWAP_16((x) >> 16)) 90 #define BSWAP_64(x) ((BSWAP_32(x) << 32) | BSWAP_32((x) >> 32)) 91 #define P2ROUNDUP(x, align) (-(-(x) & -(align))) 92 93 /* 94 * XXX Match these macro up with real zfs once we have nvlist support so that we 95 * can support large sector disks. 96 */ 97 #define UBERBLOCK_SIZE (1ULL << UBERBLOCK_SHIFT) 98 #undef offsetof 99 #define offsetof(t, m) ((int)&(((t *)0)->m)) 100 #define VDEV_UBERBLOCK_SHIFT UBERBLOCK_SHIFT 101 #define VDEV_UBERBLOCK_OFFSET(n) \ 102 offsetof(vdev_label_t, vl_uberblock[(n) << VDEV_UBERBLOCK_SHIFT]) 103 104 typedef struct uberblock uberblock_t; 105 106 /* XXX Uberblock_phys_t is no longer in the kernel zfs */ 107 typedef struct uberblock_phys { 108 uberblock_t ubp_uberblock; 109 char ubp_pad[UBERBLOCK_SIZE - sizeof (uberblock_t) - 110 sizeof (zio_block_tail_t)]; 111 zio_block_tail_t ubp_zbt; 112 } uberblock_phys_t; 113 114 /* 115 * Macros to get fields in a bp or DVA. 116 */ 117 #define P2PHASE(x, align) ((x) & ((align) - 1)) 118 #define DVA_OFFSET_TO_PHYS_SECTOR(offset) \ 119 ((offset + VDEV_LABEL_START_SIZE) >> SPA_MINBLOCKSHIFT) 120 121 /* 122 * return x rounded down to an align boundary 123 * eg, P2ALIGN(1200, 1024) == 1024 (1*align) 124 * eg, P2ALIGN(1024, 1024) == 1024 (1*align) 125 * eg, P2ALIGN(0x1234, 0x100) == 0x1200 (0x12*align) 126 * eg, P2ALIGN(0x5600, 0x100) == 0x5600 (0x56*align) 127 */ 128 #define P2ALIGN(x, align) ((x) & -(align)) 129 130 /* 131 * For nvlist manipulation. (from nvpair.h) 132 */ 133 #define NV_ENCODE_NATIVE 0 134 #define NV_ENCODE_XDR 1 135 #define HOST_ENDIAN 1 /* for x86 machine */ 136 #define DATA_TYPE_UINT64 8 137 #define DATA_TYPE_STRING 9 138 #define DATA_TYPE_NVLIST 19 139 #define DATA_TYPE_NVLIST_ARRAY 20 140 141 /* 142 * Decompression Entry - lzjb 143 */ 144 #ifndef NBBY 145 #define NBBY 8 146 #endif 147 148 typedef int zfs_decomp_func_t(void *s_start, void *d_start, size_t s_len, 149 size_t d_len); 150 typedef struct decomp_entry { 151 char *name; 152 zfs_decomp_func_t *decomp_func; 153 } decomp_entry_t; 154 155 /* 156 * FAT ZAP data structures 157 */ 158 #define ZFS_CRC64_POLY 0xC96C5795D7870F42ULL /* ECMA-182, reflected form */ 159 #define ZAP_HASH_IDX(hash, n) (((n) == 0) ? 0 : ((hash) >> (64 - (n)))) 160 #define CHAIN_END 0xffff /* end of the chunk chain */ 161 162 /* 163 * The amount of space within the chunk available for the array is: 164 * chunk size - space for type (1) - space for next pointer (2) 165 */ 166 #define ZAP_LEAF_ARRAY_BYTES (ZAP_LEAF_CHUNKSIZE - 3) 167 168 #define ZAP_LEAF_HASH_SHIFT(bs) (bs - 5) 169 #define ZAP_LEAF_HASH_NUMENTRIES(bs) (1 << ZAP_LEAF_HASH_SHIFT(bs)) 170 #define LEAF_HASH(bs, h) \ 171 ((ZAP_LEAF_HASH_NUMENTRIES(bs)-1) & \ 172 ((h) >> (64 - ZAP_LEAF_HASH_SHIFT(bs)-l->l_hdr.lh_prefix_len))) 173 174 /* 175 * The amount of space available for chunks is: 176 * block size shift - hash entry size (2) * number of hash 177 * entries - header space (2*chunksize) 178 */ 179 #define ZAP_LEAF_NUMCHUNKS(bs) \ 180 (((1<<bs) - 2*ZAP_LEAF_HASH_NUMENTRIES(bs)) / \ 181 ZAP_LEAF_CHUNKSIZE - 2) 182 183 /* 184 * The chunks start immediately after the hash table. The end of the 185 * hash table is at l_hash + HASH_NUMENTRIES, which we simply cast to a 186 * chunk_t. 187 */ 188 #define ZAP_LEAF_CHUNK(l, bs, idx) \ 189 ((zap_leaf_chunk_t *)(l->l_hash + ZAP_LEAF_HASH_NUMENTRIES(bs)))[idx] 190 #define ZAP_LEAF_ENTRY(l, bs, idx) (&ZAP_LEAF_CHUNK(l, bs, idx).l_entry) 191 192 extern void fletcher_2_native(const void *, uint64_t, zio_cksum_t *); 193 extern void fletcher_2_byteswap(const void *, uint64_t, zio_cksum_t *); 194 extern void fletcher_4_native(const void *, uint64_t, zio_cksum_t *); 195 extern void fletcher_4_byteswap(const void *, uint64_t, zio_cksum_t *); 196 extern void zio_checksum_SHA256(const void *, uint64_t, zio_cksum_t *); 197 extern int lzjb_decompress(void *, void *, size_t, size_t); 198 199 #endif /* FSYS_ZFS */ 200 201 #endif /* !_FSYS_ZFS_H */ 202