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 2010 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 #include <zfs-include/sa_impl.h> 57 58 /* 59 * Global Memory addresses to store MOS and DNODE data 60 */ 61 #define MOS ((dnode_phys_t *)\ 62 (RAW_ADDR((mbi.mem_upper << 10) + 0x100000) - ZFS_SCRATCH_SIZE)) 63 #define DNODE (MOS+1) /* move sizeof(dnode_phys_t) bytes */ 64 #define ZFS_SCRATCH ((char *)(DNODE+1)) 65 66 /* 67 * Verify dnode type. 68 * Can only be used in functions returning non-0 for failure. 69 */ 70 #define VERIFY_DN_TYPE(dnp, type) \ 71 if (type && (dnp)->dn_type != type) { \ 72 return (ERR_FSYS_CORRUPT); \ 73 } 74 75 /* 76 * Verify object set type. 77 * Can only be used in functions returning 0 for failure. 78 */ 79 #define VERIFY_OS_TYPE(osp, type) \ 80 if (type && (osp)->os_type != type) { \ 81 errnum = ERR_FSYS_CORRUPT; \ 82 return (0); \ 83 } 84 85 #define ZPOOL_PROP_BOOTFS "bootfs" 86 87 /* General macros */ 88 #define BSWAP_8(x) ((x) & 0xff) 89 #define BSWAP_16(x) ((BSWAP_8(x) << 8) | BSWAP_8((x) >> 8)) 90 #define BSWAP_32(x) ((BSWAP_16(x) << 16) | BSWAP_16((x) >> 16)) 91 #define BSWAP_64(x) ((BSWAP_32(x) << 32) | BSWAP_32((x) >> 32)) 92 #define P2ROUNDUP(x, align) (-(-(x) & -(align))) 93 94 /* 95 * XXX Match these macro up with real zfs once we have nvlist support so that we 96 * can support large sector disks. 97 */ 98 #define UBERBLOCK_SIZE (1ULL << UBERBLOCK_SHIFT) 99 #undef offsetof 100 #define offsetof(t, m) ((int)&(((t *)0)->m)) 101 #define VDEV_UBERBLOCK_SHIFT UBERBLOCK_SHIFT 102 #define VDEV_UBERBLOCK_OFFSET(n) \ 103 offsetof(vdev_label_t, vl_uberblock[(n) << VDEV_UBERBLOCK_SHIFT]) 104 105 typedef struct uberblock uberblock_t; 106 107 /* XXX Uberblock_phys_t is no longer in the kernel zfs */ 108 typedef struct uberblock_phys { 109 uberblock_t ubp_uberblock; 110 char ubp_pad[UBERBLOCK_SIZE - sizeof (uberblock_t) - 111 sizeof (zio_eck_t)]; 112 zio_eck_t ubp_zec; 113 } uberblock_phys_t; 114 115 /* 116 * Macros to get fields in a bp or DVA. 117 */ 118 #define P2PHASE(x, align) ((x) & ((align) - 1)) 119 #define DVA_OFFSET_TO_PHYS_SECTOR(offset) \ 120 ((offset + VDEV_LABEL_START_SIZE) >> SPA_MINBLOCKSHIFT) 121 122 /* 123 * return x rounded down to an align boundary 124 * eg, P2ALIGN(1200, 1024) == 1024 (1*align) 125 * eg, P2ALIGN(1024, 1024) == 1024 (1*align) 126 * eg, P2ALIGN(0x1234, 0x100) == 0x1200 (0x12*align) 127 * eg, P2ALIGN(0x5600, 0x100) == 0x5600 (0x56*align) 128 */ 129 #define P2ALIGN(x, align) ((x) & -(align)) 130 131 /* 132 * For nvlist manipulation. (from nvpair.h) 133 */ 134 #define NV_ENCODE_NATIVE 0 135 #define NV_ENCODE_XDR 1 136 #define HOST_ENDIAN 1 /* for x86 machine */ 137 #define DATA_TYPE_UINT64 8 138 #define DATA_TYPE_STRING 9 139 #define DATA_TYPE_NVLIST 19 140 #define DATA_TYPE_NVLIST_ARRAY 20 141 142 /* 143 * Decompression Entry - lzjb 144 */ 145 #ifndef NBBY 146 #define NBBY 8 147 #endif 148 149 typedef int zfs_decomp_func_t(void *s_start, void *d_start, size_t s_len, 150 size_t d_len); 151 typedef struct decomp_entry { 152 char *name; 153 zfs_decomp_func_t *decomp_func; 154 } decomp_entry_t; 155 156 /* 157 * FAT ZAP data structures 158 */ 159 #define ZFS_CRC64_POLY 0xC96C5795D7870F42ULL /* ECMA-182, reflected form */ 160 #define ZAP_HASH_IDX(hash, n) (((n) == 0) ? 0 : ((hash) >> (64 - (n)))) 161 #define CHAIN_END 0xffff /* end of the chunk chain */ 162 163 /* 164 * The amount of space within the chunk available for the array is: 165 * chunk size - space for type (1) - space for next pointer (2) 166 */ 167 #define ZAP_LEAF_ARRAY_BYTES (ZAP_LEAF_CHUNKSIZE - 3) 168 169 #define ZAP_LEAF_HASH_SHIFT(bs) (bs - 5) 170 #define ZAP_LEAF_HASH_NUMENTRIES(bs) (1 << ZAP_LEAF_HASH_SHIFT(bs)) 171 #define LEAF_HASH(bs, h) \ 172 ((ZAP_LEAF_HASH_NUMENTRIES(bs)-1) & \ 173 ((h) >> (64 - ZAP_LEAF_HASH_SHIFT(bs)-l->l_hdr.lh_prefix_len))) 174 175 /* 176 * The amount of space available for chunks is: 177 * block size shift - hash entry size (2) * number of hash 178 * entries - header space (2*chunksize) 179 */ 180 #define ZAP_LEAF_NUMCHUNKS(bs) \ 181 (((1<<bs) - 2*ZAP_LEAF_HASH_NUMENTRIES(bs)) / \ 182 ZAP_LEAF_CHUNKSIZE - 2) 183 184 /* 185 * The chunks start immediately after the hash table. The end of the 186 * hash table is at l_hash + HASH_NUMENTRIES, which we simply cast to a 187 * chunk_t. 188 */ 189 #define ZAP_LEAF_CHUNK(l, bs, idx) \ 190 ((zap_leaf_chunk_t *)(l->l_hash + ZAP_LEAF_HASH_NUMENTRIES(bs)))[idx] 191 #define ZAP_LEAF_ENTRY(l, bs, idx) (&ZAP_LEAF_CHUNK(l, bs, idx).l_entry) 192 193 extern void fletcher_2_native(const void *, uint64_t, zio_cksum_t *); 194 extern void fletcher_2_byteswap(const void *, uint64_t, zio_cksum_t *); 195 extern void fletcher_4_native(const void *, uint64_t, zio_cksum_t *); 196 extern void fletcher_4_byteswap(const void *, uint64_t, zio_cksum_t *); 197 extern void zio_checksum_SHA256(const void *, uint64_t, zio_cksum_t *); 198 extern int lzjb_decompress(void *, void *, size_t, size_t); 199 200 #endif /* FSYS_ZFS */ 201 202 #endif /* !_FSYS_ZFS_H */ 203