1185029Spjd/*- 2185029Spjd * Copyright (c) 2002 McAfee, Inc. 3185029Spjd * All rights reserved. 4185029Spjd * 5185029Spjd * This software was developed for the FreeBSD Project by Marshall 6185029Spjd * Kirk McKusick and McAfee Research,, the Security Research Division of 7185029Spjd * McAfee, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as 8185029Spjd * part of the DARPA CHATS research program 9185029Spjd * 10185029Spjd * Redistribution and use in source and binary forms, with or without 11185029Spjd * modification, are permitted provided that the following conditions 12185029Spjd * are met: 13185029Spjd * 1. Redistributions of source code must retain the above copyright 14185029Spjd * notice, this list of conditions and the following disclaimer. 15185029Spjd * 2. Redistributions in binary form must reproduce the above copyright 16185029Spjd * notice, this list of conditions and the following disclaimer in the 17185029Spjd * documentation and/or other materials provided with the distribution. 18185029Spjd * 19185029Spjd * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 20185029Spjd * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21185029Spjd * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22185029Spjd * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 23185029Spjd * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24185029Spjd * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25185029Spjd * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26185029Spjd * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27185029Spjd * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28185029Spjd * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29185029Spjd * SUCH DAMAGE. 30185029Spjd */ 31185029Spjd/* 32185029Spjd * CDDL HEADER START 33185029Spjd * 34185029Spjd * The contents of this file are subject to the terms of the 35185029Spjd * Common Development and Distribution License (the "License"). 36185029Spjd * You may not use this file except in compliance with the License. 37185029Spjd * 38185029Spjd * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 39185029Spjd * or http://www.opensolaris.org/os/licensing. 40185029Spjd * See the License for the specific language governing permissions 41185029Spjd * and limitations under the License. 42185029Spjd * 43185029Spjd * When distributing Covered Code, include this CDDL HEADER in each 44185029Spjd * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 45185029Spjd * If applicable, add the following below this CDDL HEADER, with the 46185029Spjd * fields enclosed by brackets "[]" replaced with your own identifying 47185029Spjd * information: Portions Copyright [yyyy] [name of copyright owner] 48185029Spjd * 49185029Spjd * CDDL HEADER END 50185029Spjd */ 51185029Spjd/* 52209962Smm * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 53185029Spjd * Use is subject to license terms. 54185029Spjd */ 55246586Sdelphij/* 56246586Sdelphij * Copyright 2013 by Saso Kiselkov. All rights reserved. 57246586Sdelphij */ 58185029Spjd 59236884Smm#define MAXNAMELEN 256 60236884Smm 61185029Spjd/* CRC64 table */ 62185029Spjd#define ZFS_CRC64_POLY 0xC96C5795D7870F42ULL /* ECMA-182, reflected form */ 63185029Spjd 64185029Spjd/* 65185029Spjd * Macros for various sorts of alignment and rounding when the alignment 66185029Spjd * is known to be a power of 2. 67185029Spjd */ 68185029Spjd#define P2ALIGN(x, align) ((x) & -(align)) 69185029Spjd#define P2PHASE(x, align) ((x) & ((align) - 1)) 70185029Spjd#define P2NPHASE(x, align) (-(x) & ((align) - 1)) 71185029Spjd#define P2ROUNDUP(x, align) (-(-(x) & -(align))) 72185029Spjd#define P2END(x, align) (-(~(x) & -(align))) 73185029Spjd#define P2PHASEUP(x, align, phase) ((phase) - (((phase) - (x)) & -(align))) 74208047Smm#define P2BOUNDARY(off, len, align) (((off) ^ ((off) + (len) - 1)) > (align) - 1) 75185029Spjd 76185029Spjd/* 77185029Spjd * General-purpose 32-bit and 64-bit bitfield encodings. 78185029Spjd */ 79185029Spjd#define BF32_DECODE(x, low, len) P2PHASE((x) >> (low), 1U << (len)) 80185029Spjd#define BF64_DECODE(x, low, len) P2PHASE((x) >> (low), 1ULL << (len)) 81185029Spjd#define BF32_ENCODE(x, low, len) (P2PHASE((x), 1U << (len)) << (low)) 82185029Spjd#define BF64_ENCODE(x, low, len) (P2PHASE((x), 1ULL << (len)) << (low)) 83185029Spjd 84185029Spjd#define BF32_GET(x, low, len) BF32_DECODE(x, low, len) 85185029Spjd#define BF64_GET(x, low, len) BF64_DECODE(x, low, len) 86185029Spjd 87185029Spjd#define BF32_SET(x, low, len, val) \ 88185029Spjd ((x) ^= BF32_ENCODE((x >> low) ^ (val), low, len)) 89185029Spjd#define BF64_SET(x, low, len, val) \ 90185029Spjd ((x) ^= BF64_ENCODE((x >> low) ^ (val), low, len)) 91185029Spjd 92185029Spjd#define BF32_GET_SB(x, low, len, shift, bias) \ 93185029Spjd ((BF32_GET(x, low, len) + (bias)) << (shift)) 94185029Spjd#define BF64_GET_SB(x, low, len, shift, bias) \ 95185029Spjd ((BF64_GET(x, low, len) + (bias)) << (shift)) 96185029Spjd 97185029Spjd#define BF32_SET_SB(x, low, len, shift, bias, val) \ 98185029Spjd BF32_SET(x, low, len, ((val) >> (shift)) - (bias)) 99185029Spjd#define BF64_SET_SB(x, low, len, shift, bias, val) \ 100185029Spjd BF64_SET(x, low, len, ((val) >> (shift)) - (bias)) 101185029Spjd 102185029Spjd/* 103219089Spjd * Macros to reverse byte order 104219089Spjd */ 105219089Spjd#define BSWAP_8(x) ((x) & 0xff) 106219089Spjd#define BSWAP_16(x) ((BSWAP_8(x) << 8) | BSWAP_8((x) >> 8)) 107219089Spjd#define BSWAP_32(x) ((BSWAP_16(x) << 16) | BSWAP_16((x) >> 16)) 108219089Spjd#define BSWAP_64(x) ((BSWAP_32(x) << 32) | BSWAP_32((x) >> 32)) 109219089Spjd 110219089Spjd/* 111185029Spjd * We currently support nine block sizes, from 512 bytes to 128K. 112185029Spjd * We could go higher, but the benefits are near-zero and the cost 113185029Spjd * of COWing a giant block to modify one byte would become excessive. 114185029Spjd */ 115185029Spjd#define SPA_MINBLOCKSHIFT 9 116185029Spjd#define SPA_MAXBLOCKSHIFT 17 117185029Spjd#define SPA_MINBLOCKSIZE (1ULL << SPA_MINBLOCKSHIFT) 118185029Spjd#define SPA_MAXBLOCKSIZE (1ULL << SPA_MAXBLOCKSHIFT) 119185029Spjd 120185029Spjd#define SPA_BLOCKSIZES (SPA_MAXBLOCKSHIFT - SPA_MINBLOCKSHIFT + 1) 121185029Spjd 122185029Spjd/* 123185029Spjd * The DVA size encodings for LSIZE and PSIZE support blocks up to 32MB. 124185029Spjd * The ASIZE encoding should be at least 64 times larger (6 more bits) 125185029Spjd * to support up to 4-way RAID-Z mirror mode with worst-case gang block 126185029Spjd * overhead, three DVAs per bp, plus one more bit in case we do anything 127185029Spjd * else that expands the ASIZE. 128185029Spjd */ 129185029Spjd#define SPA_LSIZEBITS 16 /* LSIZE up to 32M (2^16 * 512) */ 130185029Spjd#define SPA_PSIZEBITS 16 /* PSIZE up to 32M (2^16 * 512) */ 131185029Spjd#define SPA_ASIZEBITS 24 /* ASIZE up to 64 times larger */ 132185029Spjd 133185029Spjd/* 134185029Spjd * All SPA data is represented by 128-bit data virtual addresses (DVAs). 135185029Spjd * The members of the dva_t should be considered opaque outside the SPA. 136185029Spjd */ 137185029Spjdtypedef struct dva { 138185029Spjd uint64_t dva_word[2]; 139185029Spjd} dva_t; 140185029Spjd 141185029Spjd/* 142185029Spjd * Each block has a 256-bit checksum -- strong enough for cryptographic hashes. 143185029Spjd */ 144185029Spjdtypedef struct zio_cksum { 145185029Spjd uint64_t zc_word[4]; 146185029Spjd} zio_cksum_t; 147185029Spjd 148185029Spjd/* 149185029Spjd * Each block is described by its DVAs, time of birth, checksum, etc. 150185029Spjd * The word-by-word, bit-by-bit layout of the blkptr is as follows: 151185029Spjd * 152185029Spjd * 64 56 48 40 32 24 16 8 0 153185029Spjd * +-------+-------+-------+-------+-------+-------+-------+-------+ 154185029Spjd * 0 | vdev1 | GRID | ASIZE | 155185029Spjd * +-------+-------+-------+-------+-------+-------+-------+-------+ 156185029Spjd * 1 |G| offset1 | 157185029Spjd * +-------+-------+-------+-------+-------+-------+-------+-------+ 158185029Spjd * 2 | vdev2 | GRID | ASIZE | 159185029Spjd * +-------+-------+-------+-------+-------+-------+-------+-------+ 160185029Spjd * 3 |G| offset2 | 161185029Spjd * +-------+-------+-------+-------+-------+-------+-------+-------+ 162185029Spjd * 4 | vdev3 | GRID | ASIZE | 163185029Spjd * +-------+-------+-------+-------+-------+-------+-------+-------+ 164185029Spjd * 5 |G| offset3 | 165185029Spjd * +-------+-------+-------+-------+-------+-------+-------+-------+ 166219089Spjd * 6 |BDX|lvl| type | cksum | comp | PSIZE | LSIZE | 167185029Spjd * +-------+-------+-------+-------+-------+-------+-------+-------+ 168185029Spjd * 7 | padding | 169185029Spjd * +-------+-------+-------+-------+-------+-------+-------+-------+ 170185029Spjd * 8 | padding | 171185029Spjd * +-------+-------+-------+-------+-------+-------+-------+-------+ 172219089Spjd * 9 | physical birth txg | 173185029Spjd * +-------+-------+-------+-------+-------+-------+-------+-------+ 174219089Spjd * a | logical birth txg | 175185029Spjd * +-------+-------+-------+-------+-------+-------+-------+-------+ 176185029Spjd * b | fill count | 177185029Spjd * +-------+-------+-------+-------+-------+-------+-------+-------+ 178185029Spjd * c | checksum[0] | 179185029Spjd * +-------+-------+-------+-------+-------+-------+-------+-------+ 180185029Spjd * d | checksum[1] | 181185029Spjd * +-------+-------+-------+-------+-------+-------+-------+-------+ 182185029Spjd * e | checksum[2] | 183185029Spjd * +-------+-------+-------+-------+-------+-------+-------+-------+ 184185029Spjd * f | checksum[3] | 185185029Spjd * +-------+-------+-------+-------+-------+-------+-------+-------+ 186185029Spjd * 187185029Spjd * Legend: 188185029Spjd * 189185029Spjd * vdev virtual device ID 190185029Spjd * offset offset into virtual device 191185029Spjd * LSIZE logical size 192185029Spjd * PSIZE physical size (after compression) 193185029Spjd * ASIZE allocated size (including RAID-Z parity and gang block headers) 194185029Spjd * GRID RAID-Z layout information (reserved for future use) 195185029Spjd * cksum checksum function 196185029Spjd * comp compression function 197185029Spjd * G gang block indicator 198219089Spjd * B byteorder (endianness) 199219089Spjd * D dedup 200219089Spjd * X unused 201219089Spjd * lvl level of indirection 202185029Spjd * type DMU object type 203219089Spjd * phys birth txg of block allocation; zero if same as logical birth txg 204219089Spjd * log. birth transaction group in which the block was logically born 205185029Spjd * fill count number of non-zero blocks under this bp 206185029Spjd * checksum[4] 256-bit checksum of the data this bp describes 207185029Spjd */ 208219089Spjd#define SPA_BLKPTRSHIFT 7 /* blkptr_t is 128 bytes */ 209219089Spjd#define SPA_DVAS_PER_BP 3 /* Number of DVAs in a bp */ 210219089Spjd 211185029Spjdtypedef struct blkptr { 212219089Spjd dva_t blk_dva[SPA_DVAS_PER_BP]; /* Data Virtual Addresses */ 213219089Spjd uint64_t blk_prop; /* size, compression, type, etc */ 214219089Spjd uint64_t blk_pad[2]; /* Extra space for the future */ 215219089Spjd uint64_t blk_phys_birth; /* txg when block was allocated */ 216219089Spjd uint64_t blk_birth; /* transaction group at birth */ 217219089Spjd uint64_t blk_fill; /* fill count */ 218219089Spjd zio_cksum_t blk_cksum; /* 256-bit checksum */ 219185029Spjd} blkptr_t; 220185029Spjd 221185029Spjd/* 222185029Spjd * Macros to get and set fields in a bp or DVA. 223185029Spjd */ 224185029Spjd#define DVA_GET_ASIZE(dva) \ 225185029Spjd BF64_GET_SB((dva)->dva_word[0], 0, 24, SPA_MINBLOCKSHIFT, 0) 226185029Spjd#define DVA_SET_ASIZE(dva, x) \ 227185029Spjd BF64_SET_SB((dva)->dva_word[0], 0, 24, SPA_MINBLOCKSHIFT, 0, x) 228185029Spjd 229185029Spjd#define DVA_GET_GRID(dva) BF64_GET((dva)->dva_word[0], 24, 8) 230185029Spjd#define DVA_SET_GRID(dva, x) BF64_SET((dva)->dva_word[0], 24, 8, x) 231185029Spjd 232185029Spjd#define DVA_GET_VDEV(dva) BF64_GET((dva)->dva_word[0], 32, 32) 233185029Spjd#define DVA_SET_VDEV(dva, x) BF64_SET((dva)->dva_word[0], 32, 32, x) 234185029Spjd 235185029Spjd#define DVA_GET_OFFSET(dva) \ 236185029Spjd BF64_GET_SB((dva)->dva_word[1], 0, 63, SPA_MINBLOCKSHIFT, 0) 237185029Spjd#define DVA_SET_OFFSET(dva, x) \ 238185029Spjd BF64_SET_SB((dva)->dva_word[1], 0, 63, SPA_MINBLOCKSHIFT, 0, x) 239185029Spjd 240185029Spjd#define DVA_GET_GANG(dva) BF64_GET((dva)->dva_word[1], 63, 1) 241185029Spjd#define DVA_SET_GANG(dva, x) BF64_SET((dva)->dva_word[1], 63, 1, x) 242185029Spjd 243185029Spjd#define BP_GET_LSIZE(bp) \ 244185029Spjd (BP_IS_HOLE(bp) ? 0 : \ 245185029Spjd BF64_GET_SB((bp)->blk_prop, 0, 16, SPA_MINBLOCKSHIFT, 1)) 246185029Spjd#define BP_SET_LSIZE(bp, x) \ 247185029Spjd BF64_SET_SB((bp)->blk_prop, 0, 16, SPA_MINBLOCKSHIFT, 1, x) 248185029Spjd 249185029Spjd#define BP_GET_PSIZE(bp) \ 250185029Spjd BF64_GET_SB((bp)->blk_prop, 16, 16, SPA_MINBLOCKSHIFT, 1) 251185029Spjd#define BP_SET_PSIZE(bp, x) \ 252185029Spjd BF64_SET_SB((bp)->blk_prop, 16, 16, SPA_MINBLOCKSHIFT, 1, x) 253185029Spjd 254185029Spjd#define BP_GET_COMPRESS(bp) BF64_GET((bp)->blk_prop, 32, 8) 255185029Spjd#define BP_SET_COMPRESS(bp, x) BF64_SET((bp)->blk_prop, 32, 8, x) 256185029Spjd 257185029Spjd#define BP_GET_CHECKSUM(bp) BF64_GET((bp)->blk_prop, 40, 8) 258185029Spjd#define BP_SET_CHECKSUM(bp, x) BF64_SET((bp)->blk_prop, 40, 8, x) 259185029Spjd 260185029Spjd#define BP_GET_TYPE(bp) BF64_GET((bp)->blk_prop, 48, 8) 261185029Spjd#define BP_SET_TYPE(bp, x) BF64_SET((bp)->blk_prop, 48, 8, x) 262185029Spjd 263185029Spjd#define BP_GET_LEVEL(bp) BF64_GET((bp)->blk_prop, 56, 5) 264185029Spjd#define BP_SET_LEVEL(bp, x) BF64_SET((bp)->blk_prop, 56, 5, x) 265185029Spjd 266219089Spjd#define BP_GET_DEDUP(bp) BF64_GET((bp)->blk_prop, 62, 1) 267219089Spjd#define BP_SET_DEDUP(bp, x) BF64_SET((bp)->blk_prop, 62, 1, x) 268219089Spjd 269185029Spjd#define BP_GET_BYTEORDER(bp) (0 - BF64_GET((bp)->blk_prop, 63, 1)) 270185029Spjd#define BP_SET_BYTEORDER(bp, x) BF64_SET((bp)->blk_prop, 63, 1, x) 271185029Spjd 272219089Spjd#define BP_PHYSICAL_BIRTH(bp) \ 273219089Spjd ((bp)->blk_phys_birth ? (bp)->blk_phys_birth : (bp)->blk_birth) 274219089Spjd 275185029Spjd#define BP_GET_ASIZE(bp) \ 276185029Spjd (DVA_GET_ASIZE(&(bp)->blk_dva[0]) + DVA_GET_ASIZE(&(bp)->blk_dva[1]) + \ 277185029Spjd DVA_GET_ASIZE(&(bp)->blk_dva[2])) 278185029Spjd 279185029Spjd#define BP_GET_UCSIZE(bp) \ 280185029Spjd ((BP_GET_LEVEL(bp) > 0 || dmu_ot[BP_GET_TYPE(bp)].ot_metadata) ? \ 281185029Spjd BP_GET_PSIZE(bp) : BP_GET_LSIZE(bp)); 282185029Spjd 283185029Spjd#define BP_GET_NDVAS(bp) \ 284185029Spjd (!!DVA_GET_ASIZE(&(bp)->blk_dva[0]) + \ 285185029Spjd !!DVA_GET_ASIZE(&(bp)->blk_dva[1]) + \ 286185029Spjd !!DVA_GET_ASIZE(&(bp)->blk_dva[2])) 287185029Spjd 288185029Spjd#define BP_COUNT_GANG(bp) \ 289185029Spjd (DVA_GET_GANG(&(bp)->blk_dva[0]) + \ 290185029Spjd DVA_GET_GANG(&(bp)->blk_dva[1]) + \ 291185029Spjd DVA_GET_GANG(&(bp)->blk_dva[2])) 292185029Spjd 293185029Spjd#define DVA_EQUAL(dva1, dva2) \ 294185029Spjd ((dva1)->dva_word[1] == (dva2)->dva_word[1] && \ 295185029Spjd (dva1)->dva_word[0] == (dva2)->dva_word[0]) 296185029Spjd 297185029Spjd#define ZIO_CHECKSUM_EQUAL(zc1, zc2) \ 298185029Spjd (0 == (((zc1).zc_word[0] - (zc2).zc_word[0]) | \ 299185029Spjd ((zc1).zc_word[1] - (zc2).zc_word[1]) | \ 300185029Spjd ((zc1).zc_word[2] - (zc2).zc_word[2]) | \ 301185029Spjd ((zc1).zc_word[3] - (zc2).zc_word[3]))) 302185029Spjd 303185029Spjd 304185029Spjd#define DVA_IS_VALID(dva) (DVA_GET_ASIZE(dva) != 0) 305185029Spjd 306185029Spjd#define ZIO_SET_CHECKSUM(zcp, w0, w1, w2, w3) \ 307185029Spjd{ \ 308185029Spjd (zcp)->zc_word[0] = w0; \ 309185029Spjd (zcp)->zc_word[1] = w1; \ 310185029Spjd (zcp)->zc_word[2] = w2; \ 311185029Spjd (zcp)->zc_word[3] = w3; \ 312185029Spjd} 313185029Spjd 314185029Spjd#define BP_IDENTITY(bp) (&(bp)->blk_dva[0]) 315185029Spjd#define BP_IS_GANG(bp) DVA_GET_GANG(BP_IDENTITY(bp)) 316185029Spjd#define BP_IS_HOLE(bp) ((bp)->blk_birth == 0) 317185029Spjd#define BP_IS_OLDER(bp, txg) (!BP_IS_HOLE(bp) && (bp)->blk_birth < (txg)) 318185029Spjd 319185029Spjd#define BP_ZERO(bp) \ 320185029Spjd{ \ 321185029Spjd (bp)->blk_dva[0].dva_word[0] = 0; \ 322185029Spjd (bp)->blk_dva[0].dva_word[1] = 0; \ 323185029Spjd (bp)->blk_dva[1].dva_word[0] = 0; \ 324185029Spjd (bp)->blk_dva[1].dva_word[1] = 0; \ 325185029Spjd (bp)->blk_dva[2].dva_word[0] = 0; \ 326185029Spjd (bp)->blk_dva[2].dva_word[1] = 0; \ 327185029Spjd (bp)->blk_prop = 0; \ 328185029Spjd (bp)->blk_pad[0] = 0; \ 329185029Spjd (bp)->blk_pad[1] = 0; \ 330219089Spjd (bp)->blk_phys_birth = 0; \ 331185029Spjd (bp)->blk_birth = 0; \ 332185029Spjd (bp)->blk_fill = 0; \ 333185029Spjd ZIO_SET_CHECKSUM(&(bp)->blk_cksum, 0, 0, 0, 0); \ 334185029Spjd} 335185029Spjd 336219089Spjd/* 337219089Spjd * Embedded checksum 338219089Spjd */ 339219089Spjd#define ZEC_MAGIC 0x210da7ab10c7a11ULL 340185029Spjd 341219089Spjdtypedef struct zio_eck { 342219089Spjd uint64_t zec_magic; /* for validation, endianness */ 343219089Spjd zio_cksum_t zec_cksum; /* 256-bit checksum */ 344219089Spjd} zio_eck_t; 345185029Spjd 346219089Spjd/* 347219089Spjd * Gang block headers are self-checksumming and contain an array 348219089Spjd * of block pointers. 349219089Spjd */ 350219089Spjd#define SPA_GANGBLOCKSIZE SPA_MINBLOCKSIZE 351219089Spjd#define SPA_GBH_NBLKPTRS ((SPA_GANGBLOCKSIZE - \ 352219089Spjd sizeof (zio_eck_t)) / sizeof (blkptr_t)) 353219089Spjd#define SPA_GBH_FILLER ((SPA_GANGBLOCKSIZE - \ 354219089Spjd sizeof (zio_eck_t) - \ 355219089Spjd (SPA_GBH_NBLKPTRS * sizeof (blkptr_t))) /\ 356219089Spjd sizeof (uint64_t)) 357219089Spjd 358219089Spjdtypedef struct zio_gbh { 359219089Spjd blkptr_t zg_blkptr[SPA_GBH_NBLKPTRS]; 360219089Spjd uint64_t zg_filler[SPA_GBH_FILLER]; 361219089Spjd zio_eck_t zg_tail; 362219089Spjd} zio_gbh_phys_t; 363219089Spjd 364219089Spjd#define VDEV_RAIDZ_MAXPARITY 3 365219089Spjd 366209962Smm#define VDEV_PAD_SIZE (8 << 10) 367209962Smm/* 2 padding areas (vl_pad1 and vl_pad2) to skip */ 368209962Smm#define VDEV_SKIP_SIZE VDEV_PAD_SIZE * 2 369185029Spjd#define VDEV_PHYS_SIZE (112 << 10) 370185029Spjd#define VDEV_UBERBLOCK_RING (128 << 10) 371185029Spjd 372185029Spjd#define VDEV_UBERBLOCK_SHIFT(vd) \ 373219089Spjd MAX((vd)->v_top->v_ashift, UBERBLOCK_SHIFT) 374185029Spjd#define VDEV_UBERBLOCK_COUNT(vd) \ 375185029Spjd (VDEV_UBERBLOCK_RING >> VDEV_UBERBLOCK_SHIFT(vd)) 376185029Spjd#define VDEV_UBERBLOCK_OFFSET(vd, n) \ 377185029Spjd offsetof(vdev_label_t, vl_uberblock[(n) << VDEV_UBERBLOCK_SHIFT(vd)]) 378185029Spjd#define VDEV_UBERBLOCK_SIZE(vd) (1ULL << VDEV_UBERBLOCK_SHIFT(vd)) 379185029Spjd 380185029Spjdtypedef struct vdev_phys { 381219089Spjd char vp_nvlist[VDEV_PHYS_SIZE - sizeof (zio_eck_t)]; 382219089Spjd zio_eck_t vp_zbt; 383185029Spjd} vdev_phys_t; 384185029Spjd 385185029Spjdtypedef struct vdev_label { 386209962Smm char vl_pad1[VDEV_PAD_SIZE]; /* 8K */ 387209962Smm char vl_pad2[VDEV_PAD_SIZE]; /* 8K */ 388185029Spjd vdev_phys_t vl_vdev_phys; /* 112K */ 389185029Spjd char vl_uberblock[VDEV_UBERBLOCK_RING]; /* 128K */ 390185029Spjd} vdev_label_t; /* 256K total */ 391185029Spjd 392185029Spjd/* 393185029Spjd * vdev_dirty() flags 394185029Spjd */ 395185029Spjd#define VDD_METASLAB 0x01 396185029Spjd#define VDD_DTL 0x02 397185029Spjd 398185029Spjd/* 399185029Spjd * Size and offset of embedded boot loader region on each label. 400185029Spjd * The total size of the first two labels plus the boot area is 4MB. 401185029Spjd */ 402185029Spjd#define VDEV_BOOT_OFFSET (2 * sizeof (vdev_label_t)) 403185029Spjd#define VDEV_BOOT_SIZE (7ULL << 19) /* 3.5M */ 404185029Spjd 405185029Spjd/* 406185029Spjd * Size of label regions at the start and end of each leaf device. 407185029Spjd */ 408185029Spjd#define VDEV_LABEL_START_SIZE (2 * sizeof (vdev_label_t) + VDEV_BOOT_SIZE) 409185029Spjd#define VDEV_LABEL_END_SIZE (2 * sizeof (vdev_label_t)) 410185029Spjd#define VDEV_LABELS 4 411185029Spjd 412185029Spjdenum zio_checksum { 413185029Spjd ZIO_CHECKSUM_INHERIT = 0, 414185029Spjd ZIO_CHECKSUM_ON, 415185029Spjd ZIO_CHECKSUM_OFF, 416185029Spjd ZIO_CHECKSUM_LABEL, 417185029Spjd ZIO_CHECKSUM_GANG_HEADER, 418185029Spjd ZIO_CHECKSUM_ZILOG, 419185029Spjd ZIO_CHECKSUM_FLETCHER_2, 420185029Spjd ZIO_CHECKSUM_FLETCHER_4, 421185029Spjd ZIO_CHECKSUM_SHA256, 422219089Spjd ZIO_CHECKSUM_ZILOG2, 423185029Spjd ZIO_CHECKSUM_FUNCTIONS 424185029Spjd}; 425185029Spjd 426219089Spjd#define ZIO_CHECKSUM_ON_VALUE ZIO_CHECKSUM_FLETCHER_4 427185029Spjd#define ZIO_CHECKSUM_DEFAULT ZIO_CHECKSUM_ON 428185029Spjd 429185029Spjdenum zio_compress { 430185029Spjd ZIO_COMPRESS_INHERIT = 0, 431185029Spjd ZIO_COMPRESS_ON, 432185029Spjd ZIO_COMPRESS_OFF, 433185029Spjd ZIO_COMPRESS_LZJB, 434185029Spjd ZIO_COMPRESS_EMPTY, 435185029Spjd ZIO_COMPRESS_GZIP_1, 436185029Spjd ZIO_COMPRESS_GZIP_2, 437185029Spjd ZIO_COMPRESS_GZIP_3, 438185029Spjd ZIO_COMPRESS_GZIP_4, 439185029Spjd ZIO_COMPRESS_GZIP_5, 440185029Spjd ZIO_COMPRESS_GZIP_6, 441185029Spjd ZIO_COMPRESS_GZIP_7, 442185029Spjd ZIO_COMPRESS_GZIP_8, 443185029Spjd ZIO_COMPRESS_GZIP_9, 444219089Spjd ZIO_COMPRESS_ZLE, 445246586Sdelphij ZIO_COMPRESS_LZ4, 446185029Spjd ZIO_COMPRESS_FUNCTIONS 447185029Spjd}; 448185029Spjd 449185029Spjd#define ZIO_COMPRESS_ON_VALUE ZIO_COMPRESS_LZJB 450185029Spjd#define ZIO_COMPRESS_DEFAULT ZIO_COMPRESS_OFF 451185029Spjd 452185029Spjd/* nvlist pack encoding */ 453185029Spjd#define NV_ENCODE_NATIVE 0 454185029Spjd#define NV_ENCODE_XDR 1 455185029Spjd 456185029Spjdtypedef enum { 457185029Spjd DATA_TYPE_UNKNOWN = 0, 458185029Spjd DATA_TYPE_BOOLEAN, 459185029Spjd DATA_TYPE_BYTE, 460185029Spjd DATA_TYPE_INT16, 461185029Spjd DATA_TYPE_UINT16, 462185029Spjd DATA_TYPE_INT32, 463185029Spjd DATA_TYPE_UINT32, 464185029Spjd DATA_TYPE_INT64, 465185029Spjd DATA_TYPE_UINT64, 466185029Spjd DATA_TYPE_STRING, 467185029Spjd DATA_TYPE_BYTE_ARRAY, 468185029Spjd DATA_TYPE_INT16_ARRAY, 469185029Spjd DATA_TYPE_UINT16_ARRAY, 470185029Spjd DATA_TYPE_INT32_ARRAY, 471185029Spjd DATA_TYPE_UINT32_ARRAY, 472185029Spjd DATA_TYPE_INT64_ARRAY, 473185029Spjd DATA_TYPE_UINT64_ARRAY, 474185029Spjd DATA_TYPE_STRING_ARRAY, 475185029Spjd DATA_TYPE_HRTIME, 476185029Spjd DATA_TYPE_NVLIST, 477185029Spjd DATA_TYPE_NVLIST_ARRAY, 478185029Spjd DATA_TYPE_BOOLEAN_VALUE, 479185029Spjd DATA_TYPE_INT8, 480185029Spjd DATA_TYPE_UINT8, 481185029Spjd DATA_TYPE_BOOLEAN_ARRAY, 482185029Spjd DATA_TYPE_INT8_ARRAY, 483185029Spjd DATA_TYPE_UINT8_ARRAY 484185029Spjd} data_type_t; 485185029Spjd 486185029Spjd/* 487185029Spjd * On-disk version number. 488185029Spjd */ 489185097Sdfr#define SPA_VERSION_1 1ULL 490185097Sdfr#define SPA_VERSION_2 2ULL 491185097Sdfr#define SPA_VERSION_3 3ULL 492185097Sdfr#define SPA_VERSION_4 4ULL 493185097Sdfr#define SPA_VERSION_5 5ULL 494185097Sdfr#define SPA_VERSION_6 6ULL 495185097Sdfr#define SPA_VERSION_7 7ULL 496185097Sdfr#define SPA_VERSION_8 8ULL 497185097Sdfr#define SPA_VERSION_9 9ULL 498185097Sdfr#define SPA_VERSION_10 10ULL 499185097Sdfr#define SPA_VERSION_11 11ULL 500185154Sdfr#define SPA_VERSION_12 12ULL 501185154Sdfr#define SPA_VERSION_13 13ULL 502201143Sdelphij#define SPA_VERSION_14 14ULL 503209962Smm#define SPA_VERSION_15 15ULL 504219089Spjd#define SPA_VERSION_16 16ULL 505219089Spjd#define SPA_VERSION_17 17ULL 506219089Spjd#define SPA_VERSION_18 18ULL 507219089Spjd#define SPA_VERSION_19 19ULL 508219089Spjd#define SPA_VERSION_20 20ULL 509219089Spjd#define SPA_VERSION_21 21ULL 510219089Spjd#define SPA_VERSION_22 22ULL 511219089Spjd#define SPA_VERSION_23 23ULL 512219089Spjd#define SPA_VERSION_24 24ULL 513219089Spjd#define SPA_VERSION_25 25ULL 514219089Spjd#define SPA_VERSION_26 26ULL 515219089Spjd#define SPA_VERSION_27 27ULL 516219089Spjd#define SPA_VERSION_28 28ULL 517236884Smm#define SPA_VERSION_5000 5000ULL 518219089Spjd 519185029Spjd/* 520219089Spjd * When bumping up SPA_VERSION, make sure GRUB ZFS understands the on-disk 521219089Spjd * format change. Go to usr/src/grub/grub-0.97/stage2/{zfs-include/, fsys_zfs*}, 522219089Spjd * and do the appropriate changes. Also bump the version number in 523219089Spjd * usr/src/grub/capability. 524185029Spjd */ 525236884Smm#define SPA_VERSION SPA_VERSION_5000 526236884Smm#define SPA_VERSION_STRING "5000" 527185029Spjd 528185029Spjd/* 529185097Sdfr * Symbolic names for the changes that caused a SPA_VERSION switch. 530185029Spjd * Used in the code when checking for presence or absence of a feature. 531185029Spjd * Feel free to define multiple symbolic names for each version if there 532185029Spjd * were multiple changes to on-disk structures during that version. 533185029Spjd * 534185097Sdfr * NOTE: When checking the current SPA_VERSION in your code, be sure 535185029Spjd * to use spa_version() since it reports the version of the 536185029Spjd * last synced uberblock. Checking the in-flight version can 537185029Spjd * be dangerous in some cases. 538185029Spjd */ 539185097Sdfr#define SPA_VERSION_INITIAL SPA_VERSION_1 540185097Sdfr#define SPA_VERSION_DITTO_BLOCKS SPA_VERSION_2 541185097Sdfr#define SPA_VERSION_SPARES SPA_VERSION_3 542185097Sdfr#define SPA_VERSION_RAID6 SPA_VERSION_3 543185097Sdfr#define SPA_VERSION_BPLIST_ACCOUNT SPA_VERSION_3 544185097Sdfr#define SPA_VERSION_RAIDZ_DEFLATE SPA_VERSION_3 545185097Sdfr#define SPA_VERSION_DNODE_BYTES SPA_VERSION_3 546185097Sdfr#define SPA_VERSION_ZPOOL_HISTORY SPA_VERSION_4 547185097Sdfr#define SPA_VERSION_GZIP_COMPRESSION SPA_VERSION_5 548185097Sdfr#define SPA_VERSION_BOOTFS SPA_VERSION_6 549185154Sdfr#define SPA_VERSION_SLOGS SPA_VERSION_7 550185154Sdfr#define SPA_VERSION_DELEGATED_PERMS SPA_VERSION_8 551185154Sdfr#define SPA_VERSION_FUID SPA_VERSION_9 552185154Sdfr#define SPA_VERSION_REFRESERVATION SPA_VERSION_9 553185154Sdfr#define SPA_VERSION_REFQUOTA SPA_VERSION_9 554185154Sdfr#define SPA_VERSION_UNIQUE_ACCURATE SPA_VERSION_9 555185154Sdfr#define SPA_VERSION_L2CACHE SPA_VERSION_10 556185154Sdfr#define SPA_VERSION_NEXT_CLONES SPA_VERSION_11 557185154Sdfr#define SPA_VERSION_ORIGIN SPA_VERSION_11 558185154Sdfr#define SPA_VERSION_DSL_SCRUB SPA_VERSION_11 559185154Sdfr#define SPA_VERSION_SNAP_PROPS SPA_VERSION_12 560185154Sdfr#define SPA_VERSION_USED_BREAKDOWN SPA_VERSION_13 561201143Sdelphij#define SPA_VERSION_PASSTHROUGH_X SPA_VERSION_14 562209962Smm#define SPA_VERSION_USERSPACE SPA_VERSION_15 563219089Spjd#define SPA_VERSION_STMF_PROP SPA_VERSION_16 564219089Spjd#define SPA_VERSION_RAIDZ3 SPA_VERSION_17 565219089Spjd#define SPA_VERSION_USERREFS SPA_VERSION_18 566219089Spjd#define SPA_VERSION_HOLES SPA_VERSION_19 567219089Spjd#define SPA_VERSION_ZLE_COMPRESSION SPA_VERSION_20 568219089Spjd#define SPA_VERSION_DEDUP SPA_VERSION_21 569219089Spjd#define SPA_VERSION_RECVD_PROPS SPA_VERSION_22 570219089Spjd#define SPA_VERSION_SLIM_ZIL SPA_VERSION_23 571219089Spjd#define SPA_VERSION_SA SPA_VERSION_24 572219089Spjd#define SPA_VERSION_SCAN SPA_VERSION_25 573219089Spjd#define SPA_VERSION_DIR_CLONES SPA_VERSION_26 574219089Spjd#define SPA_VERSION_DEADLISTS SPA_VERSION_26 575219089Spjd#define SPA_VERSION_FAST_SNAP SPA_VERSION_27 576219089Spjd#define SPA_VERSION_MULTI_REPLACE SPA_VERSION_28 577236884Smm#define SPA_VERSION_BEFORE_FEATURES SPA_VERSION_28 578236884Smm#define SPA_VERSION_FEATURES SPA_VERSION_5000 579185029Spjd 580236884Smm#define SPA_VERSION_IS_SUPPORTED(v) \ 581236884Smm (((v) >= SPA_VERSION_INITIAL && (v) <= SPA_VERSION_BEFORE_FEATURES) || \ 582236884Smm ((v) >= SPA_VERSION_FEATURES && (v) <= SPA_VERSION)) 583236884Smm 584185029Spjd/* 585185029Spjd * The following are configuration names used in the nvlist describing a pool's 586185029Spjd * configuration. 587185029Spjd */ 588185029Spjd#define ZPOOL_CONFIG_VERSION "version" 589185029Spjd#define ZPOOL_CONFIG_POOL_NAME "name" 590185029Spjd#define ZPOOL_CONFIG_POOL_STATE "state" 591185029Spjd#define ZPOOL_CONFIG_POOL_TXG "txg" 592185029Spjd#define ZPOOL_CONFIG_POOL_GUID "pool_guid" 593185029Spjd#define ZPOOL_CONFIG_CREATE_TXG "create_txg" 594185029Spjd#define ZPOOL_CONFIG_TOP_GUID "top_guid" 595185029Spjd#define ZPOOL_CONFIG_VDEV_TREE "vdev_tree" 596185029Spjd#define ZPOOL_CONFIG_TYPE "type" 597185029Spjd#define ZPOOL_CONFIG_CHILDREN "children" 598185029Spjd#define ZPOOL_CONFIG_ID "id" 599185029Spjd#define ZPOOL_CONFIG_GUID "guid" 600185029Spjd#define ZPOOL_CONFIG_PATH "path" 601185029Spjd#define ZPOOL_CONFIG_DEVID "devid" 602185029Spjd#define ZPOOL_CONFIG_METASLAB_ARRAY "metaslab_array" 603185029Spjd#define ZPOOL_CONFIG_METASLAB_SHIFT "metaslab_shift" 604185029Spjd#define ZPOOL_CONFIG_ASHIFT "ashift" 605185029Spjd#define ZPOOL_CONFIG_ASIZE "asize" 606185029Spjd#define ZPOOL_CONFIG_DTL "DTL" 607185029Spjd#define ZPOOL_CONFIG_STATS "stats" 608185029Spjd#define ZPOOL_CONFIG_WHOLE_DISK "whole_disk" 609185029Spjd#define ZPOOL_CONFIG_ERRCOUNT "error_count" 610185029Spjd#define ZPOOL_CONFIG_NOT_PRESENT "not_present" 611185029Spjd#define ZPOOL_CONFIG_SPARES "spares" 612185029Spjd#define ZPOOL_CONFIG_IS_SPARE "is_spare" 613185029Spjd#define ZPOOL_CONFIG_NPARITY "nparity" 614185029Spjd#define ZPOOL_CONFIG_HOSTID "hostid" 615185029Spjd#define ZPOOL_CONFIG_HOSTNAME "hostname" 616212407Spjd#define ZPOOL_CONFIG_IS_LOG "is_log" 617185029Spjd#define ZPOOL_CONFIG_TIMESTAMP "timestamp" /* not stored on disk */ 618236884Smm#define ZPOOL_CONFIG_FEATURES_FOR_READ "features_for_read" 619185029Spjd 620201689Sdelphij/* 621201689Sdelphij * The persistent vdev state is stored as separate values rather than a single 622201689Sdelphij * 'vdev_state' entry. This is because a device can be in multiple states, such 623201689Sdelphij * as offline and degraded. 624201689Sdelphij */ 625201689Sdelphij#define ZPOOL_CONFIG_OFFLINE "offline" 626201689Sdelphij#define ZPOOL_CONFIG_FAULTED "faulted" 627201689Sdelphij#define ZPOOL_CONFIG_DEGRADED "degraded" 628201689Sdelphij#define ZPOOL_CONFIG_REMOVED "removed" 629219089Spjd#define ZPOOL_CONFIG_FRU "fru" 630219089Spjd#define ZPOOL_CONFIG_AUX_STATE "aux_state" 631201689Sdelphij 632185029Spjd#define VDEV_TYPE_ROOT "root" 633185029Spjd#define VDEV_TYPE_MIRROR "mirror" 634185029Spjd#define VDEV_TYPE_REPLACING "replacing" 635185029Spjd#define VDEV_TYPE_RAIDZ "raidz" 636185029Spjd#define VDEV_TYPE_DISK "disk" 637185029Spjd#define VDEV_TYPE_FILE "file" 638185029Spjd#define VDEV_TYPE_MISSING "missing" 639219089Spjd#define VDEV_TYPE_HOLE "hole" 640185029Spjd#define VDEV_TYPE_SPARE "spare" 641219089Spjd#define VDEV_TYPE_LOG "log" 642219089Spjd#define VDEV_TYPE_L2CACHE "l2cache" 643185029Spjd 644185029Spjd/* 645185029Spjd * This is needed in userland to report the minimum necessary device size. 646185029Spjd */ 647185029Spjd#define SPA_MINDEVSIZE (64ULL << 20) 648185029Spjd 649185029Spjd/* 650185029Spjd * The location of the pool configuration repository, shared between kernel and 651185029Spjd * userland. 652185029Spjd */ 653219089Spjd#define ZPOOL_CACHE "/boot/zfs/zpool.cache" 654185029Spjd 655185029Spjd/* 656185029Spjd * vdev states are ordered from least to most healthy. 657185029Spjd * A vdev that's CANT_OPEN or below is considered unusable. 658185029Spjd */ 659185029Spjdtypedef enum vdev_state { 660185029Spjd VDEV_STATE_UNKNOWN = 0, /* Uninitialized vdev */ 661185029Spjd VDEV_STATE_CLOSED, /* Not currently open */ 662185029Spjd VDEV_STATE_OFFLINE, /* Not allowed to open */ 663201689Sdelphij VDEV_STATE_REMOVED, /* Explicitly removed from system */ 664185029Spjd VDEV_STATE_CANT_OPEN, /* Tried to open, but failed */ 665201689Sdelphij VDEV_STATE_FAULTED, /* External request to fault device */ 666185029Spjd VDEV_STATE_DEGRADED, /* Replicated vdev with unhealthy kids */ 667185029Spjd VDEV_STATE_HEALTHY /* Presumed good */ 668185029Spjd} vdev_state_t; 669185029Spjd 670185029Spjd/* 671185029Spjd * vdev aux states. When a vdev is in the CANT_OPEN state, the aux field 672185029Spjd * of the vdev stats structure uses these constants to distinguish why. 673185029Spjd */ 674185029Spjdtypedef enum vdev_aux { 675185029Spjd VDEV_AUX_NONE, /* no error */ 676185029Spjd VDEV_AUX_OPEN_FAILED, /* ldi_open_*() or vn_open() failed */ 677185029Spjd VDEV_AUX_CORRUPT_DATA, /* bad label or disk contents */ 678185029Spjd VDEV_AUX_NO_REPLICAS, /* insufficient number of replicas */ 679185029Spjd VDEV_AUX_BAD_GUID_SUM, /* vdev guid sum doesn't match */ 680185029Spjd VDEV_AUX_TOO_SMALL, /* vdev size is too small */ 681185029Spjd VDEV_AUX_BAD_LABEL, /* the label is OK but invalid */ 682185029Spjd VDEV_AUX_VERSION_NEWER, /* on-disk version is too new */ 683185029Spjd VDEV_AUX_VERSION_OLDER, /* on-disk version is too old */ 684185029Spjd VDEV_AUX_SPARED /* hot spare used in another pool */ 685185029Spjd} vdev_aux_t; 686185029Spjd 687185029Spjd/* 688185029Spjd * pool state. The following states are written to disk as part of the normal 689185029Spjd * SPA lifecycle: ACTIVE, EXPORTED, DESTROYED, SPARE. The remaining states are 690185029Spjd * software abstractions used at various levels to communicate pool state. 691185029Spjd */ 692185029Spjdtypedef enum pool_state { 693185029Spjd POOL_STATE_ACTIVE = 0, /* In active use */ 694185029Spjd POOL_STATE_EXPORTED, /* Explicitly exported */ 695185029Spjd POOL_STATE_DESTROYED, /* Explicitly destroyed */ 696185029Spjd POOL_STATE_SPARE, /* Reserved for hot spare use */ 697185029Spjd POOL_STATE_UNINITIALIZED, /* Internal spa_t state */ 698185029Spjd POOL_STATE_UNAVAIL, /* Internal libzfs state */ 699185029Spjd POOL_STATE_POTENTIALLY_ACTIVE /* Internal libzfs state */ 700185029Spjd} pool_state_t; 701185029Spjd 702185029Spjd/* 703185029Spjd * The uberblock version is incremented whenever an incompatible on-disk 704185029Spjd * format change is made to the SPA, DMU, or ZAP. 705185029Spjd * 706185029Spjd * Note: the first two fields should never be moved. When a storage pool 707185029Spjd * is opened, the uberblock must be read off the disk before the version 708185029Spjd * can be checked. If the ub_version field is moved, we may not detect 709185029Spjd * version mismatch. If the ub_magic field is moved, applications that 710185029Spjd * expect the magic number in the first word won't work. 711185029Spjd */ 712185029Spjd#define UBERBLOCK_MAGIC 0x00bab10c /* oo-ba-bloc! */ 713185029Spjd#define UBERBLOCK_SHIFT 10 /* up to 1K */ 714185029Spjd 715185029Spjdstruct uberblock { 716185029Spjd uint64_t ub_magic; /* UBERBLOCK_MAGIC */ 717185097Sdfr uint64_t ub_version; /* SPA_VERSION */ 718185029Spjd uint64_t ub_txg; /* txg of last sync */ 719185029Spjd uint64_t ub_guid_sum; /* sum of all vdev guids */ 720185029Spjd uint64_t ub_timestamp; /* UTC time of last sync */ 721185029Spjd blkptr_t ub_rootbp; /* MOS objset_phys_t */ 722185029Spjd}; 723185029Spjd 724185029Spjd/* 725185029Spjd * Flags. 726185029Spjd */ 727185029Spjd#define DNODE_MUST_BE_ALLOCATED 1 728185029Spjd#define DNODE_MUST_BE_FREE 2 729185029Spjd 730185029Spjd/* 731185029Spjd * Fixed constants. 732185029Spjd */ 733185029Spjd#define DNODE_SHIFT 9 /* 512 bytes */ 734185029Spjd#define DN_MIN_INDBLKSHIFT 10 /* 1k */ 735185029Spjd#define DN_MAX_INDBLKSHIFT 14 /* 16k */ 736185029Spjd#define DNODE_BLOCK_SHIFT 14 /* 16k */ 737185029Spjd#define DNODE_CORE_SIZE 64 /* 64 bytes for dnode sans blkptrs */ 738185029Spjd#define DN_MAX_OBJECT_SHIFT 48 /* 256 trillion (zfs_fid_t limit) */ 739185029Spjd#define DN_MAX_OFFSET_SHIFT 64 /* 2^64 bytes in a dnode */ 740185029Spjd 741185029Spjd/* 742185029Spjd * Derived constants. 743185029Spjd */ 744185029Spjd#define DNODE_SIZE (1 << DNODE_SHIFT) 745185029Spjd#define DN_MAX_NBLKPTR ((DNODE_SIZE - DNODE_CORE_SIZE) >> SPA_BLKPTRSHIFT) 746185029Spjd#define DN_MAX_BONUSLEN (DNODE_SIZE - DNODE_CORE_SIZE - (1 << SPA_BLKPTRSHIFT)) 747185029Spjd#define DN_MAX_OBJECT (1ULL << DN_MAX_OBJECT_SHIFT) 748185029Spjd 749185029Spjd#define DNODES_PER_BLOCK_SHIFT (DNODE_BLOCK_SHIFT - DNODE_SHIFT) 750185029Spjd#define DNODES_PER_BLOCK (1ULL << DNODES_PER_BLOCK_SHIFT) 751185029Spjd#define DNODES_PER_LEVEL_SHIFT (DN_MAX_INDBLKSHIFT - SPA_BLKPTRSHIFT) 752185029Spjd 753185029Spjd/* The +2 here is a cheesy way to round up */ 754185029Spjd#define DN_MAX_LEVELS (2 + ((DN_MAX_OFFSET_SHIFT - SPA_MINBLOCKSHIFT) / \ 755185029Spjd (DN_MIN_INDBLKSHIFT - SPA_BLKPTRSHIFT))) 756185029Spjd 757185029Spjd#define DN_BONUS(dnp) ((void*)((dnp)->dn_bonus + \ 758185029Spjd (((dnp)->dn_nblkptr - 1) * sizeof (blkptr_t)))) 759185029Spjd 760185029Spjd#define DN_USED_BYTES(dnp) (((dnp)->dn_flags & DNODE_FLAG_USED_BYTES) ? \ 761185029Spjd (dnp)->dn_used : (dnp)->dn_used << SPA_MINBLOCKSHIFT) 762185029Spjd 763185029Spjd#define EPB(blkshift, typeshift) (1 << (blkshift - typeshift)) 764185029Spjd 765185029Spjd/* Is dn_used in bytes? if not, it's in multiples of SPA_MINBLOCKSIZE */ 766219089Spjd#define DNODE_FLAG_USED_BYTES (1<<0) 767219089Spjd#define DNODE_FLAG_USERUSED_ACCOUNTED (1<<1) 768185029Spjd 769219089Spjd/* Does dnode have a SA spill blkptr in bonus? */ 770219089Spjd#define DNODE_FLAG_SPILL_BLKPTR (1<<2) 771219089Spjd 772185029Spjdtypedef struct dnode_phys { 773185029Spjd uint8_t dn_type; /* dmu_object_type_t */ 774185029Spjd uint8_t dn_indblkshift; /* ln2(indirect block size) */ 775185029Spjd uint8_t dn_nlevels; /* 1=dn_blkptr->data blocks */ 776185029Spjd uint8_t dn_nblkptr; /* length of dn_blkptr */ 777185029Spjd uint8_t dn_bonustype; /* type of data in bonus buffer */ 778185029Spjd uint8_t dn_checksum; /* ZIO_CHECKSUM type */ 779185029Spjd uint8_t dn_compress; /* ZIO_COMPRESS type */ 780185029Spjd uint8_t dn_flags; /* DNODE_FLAG_* */ 781185029Spjd uint16_t dn_datablkszsec; /* data block size in 512b sectors */ 782185029Spjd uint16_t dn_bonuslen; /* length of dn_bonus */ 783185029Spjd uint8_t dn_pad2[4]; 784185029Spjd 785185029Spjd /* accounting is protected by dn_dirty_mtx */ 786185029Spjd uint64_t dn_maxblkid; /* largest allocated block ID */ 787185029Spjd uint64_t dn_used; /* bytes (or sectors) of disk space */ 788185029Spjd 789185029Spjd uint64_t dn_pad3[4]; 790185029Spjd 791185029Spjd blkptr_t dn_blkptr[1]; 792219089Spjd uint8_t dn_bonus[DN_MAX_BONUSLEN - sizeof (blkptr_t)]; 793219089Spjd blkptr_t dn_spill; 794185029Spjd} dnode_phys_t; 795185029Spjd 796185029Spjdtypedef enum dmu_object_type { 797185029Spjd DMU_OT_NONE, 798185029Spjd /* general: */ 799185029Spjd DMU_OT_OBJECT_DIRECTORY, /* ZAP */ 800185029Spjd DMU_OT_OBJECT_ARRAY, /* UINT64 */ 801185029Spjd DMU_OT_PACKED_NVLIST, /* UINT8 (XDR by nvlist_pack/unpack) */ 802185029Spjd DMU_OT_PACKED_NVLIST_SIZE, /* UINT64 */ 803185029Spjd DMU_OT_BPLIST, /* UINT64 */ 804185029Spjd DMU_OT_BPLIST_HDR, /* UINT64 */ 805185029Spjd /* spa: */ 806185029Spjd DMU_OT_SPACE_MAP_HEADER, /* UINT64 */ 807185029Spjd DMU_OT_SPACE_MAP, /* UINT64 */ 808185029Spjd /* zil: */ 809185029Spjd DMU_OT_INTENT_LOG, /* UINT64 */ 810185029Spjd /* dmu: */ 811185029Spjd DMU_OT_DNODE, /* DNODE */ 812185029Spjd DMU_OT_OBJSET, /* OBJSET */ 813185029Spjd /* dsl: */ 814185029Spjd DMU_OT_DSL_DIR, /* UINT64 */ 815185029Spjd DMU_OT_DSL_DIR_CHILD_MAP, /* ZAP */ 816185029Spjd DMU_OT_DSL_DS_SNAP_MAP, /* ZAP */ 817185029Spjd DMU_OT_DSL_PROPS, /* ZAP */ 818185029Spjd DMU_OT_DSL_DATASET, /* UINT64 */ 819185029Spjd /* zpl: */ 820185029Spjd DMU_OT_ZNODE, /* ZNODE */ 821219089Spjd DMU_OT_OLDACL, /* Old ACL */ 822185029Spjd DMU_OT_PLAIN_FILE_CONTENTS, /* UINT8 */ 823185029Spjd DMU_OT_DIRECTORY_CONTENTS, /* ZAP */ 824185029Spjd DMU_OT_MASTER_NODE, /* ZAP */ 825185029Spjd DMU_OT_UNLINKED_SET, /* ZAP */ 826185029Spjd /* zvol: */ 827185029Spjd DMU_OT_ZVOL, /* UINT8 */ 828185029Spjd DMU_OT_ZVOL_PROP, /* ZAP */ 829185029Spjd /* other; for testing only! */ 830185029Spjd DMU_OT_PLAIN_OTHER, /* UINT8 */ 831185029Spjd DMU_OT_UINT64_OTHER, /* UINT64 */ 832185029Spjd DMU_OT_ZAP_OTHER, /* ZAP */ 833185029Spjd /* new object types: */ 834185029Spjd DMU_OT_ERROR_LOG, /* ZAP */ 835185029Spjd DMU_OT_SPA_HISTORY, /* UINT8 */ 836185029Spjd DMU_OT_SPA_HISTORY_OFFSETS, /* spa_his_phys_t */ 837185029Spjd DMU_OT_POOL_PROPS, /* ZAP */ 838219089Spjd DMU_OT_DSL_PERMS, /* ZAP */ 839219089Spjd DMU_OT_ACL, /* ACL */ 840219089Spjd DMU_OT_SYSACL, /* SYSACL */ 841219089Spjd DMU_OT_FUID, /* FUID table (Packed NVLIST UINT8) */ 842219089Spjd DMU_OT_FUID_SIZE, /* FUID table size UINT64 */ 843219089Spjd DMU_OT_NEXT_CLONES, /* ZAP */ 844219089Spjd DMU_OT_SCAN_QUEUE, /* ZAP */ 845219089Spjd DMU_OT_USERGROUP_USED, /* ZAP */ 846219089Spjd DMU_OT_USERGROUP_QUOTA, /* ZAP */ 847219089Spjd DMU_OT_USERREFS, /* ZAP */ 848219089Spjd DMU_OT_DDT_ZAP, /* ZAP */ 849219089Spjd DMU_OT_DDT_STATS, /* ZAP */ 850219089Spjd DMU_OT_SA, /* System attr */ 851219089Spjd DMU_OT_SA_MASTER_NODE, /* ZAP */ 852219089Spjd DMU_OT_SA_ATTR_REGISTRATION, /* ZAP */ 853219089Spjd DMU_OT_SA_ATTR_LAYOUTS, /* ZAP */ 854219089Spjd DMU_OT_SCAN_XLATE, /* ZAP */ 855219089Spjd DMU_OT_DEDUP, /* fake dedup BP from ddt_bp_create() */ 856185029Spjd DMU_OT_NUMTYPES 857185029Spjd} dmu_object_type_t; 858185029Spjd 859185029Spjdtypedef enum dmu_objset_type { 860185029Spjd DMU_OST_NONE, 861185029Spjd DMU_OST_META, 862185029Spjd DMU_OST_ZFS, 863185029Spjd DMU_OST_ZVOL, 864185029Spjd DMU_OST_OTHER, /* For testing only! */ 865185029Spjd DMU_OST_ANY, /* Be careful! */ 866185029Spjd DMU_OST_NUMTYPES 867185029Spjd} dmu_objset_type_t; 868185029Spjd 869185029Spjd/* 870219089Spjd * header for all bonus and spill buffers. 871219089Spjd * The header has a fixed portion with a variable number 872219089Spjd * of "lengths" depending on the number of variable sized 873219089Spjd * attribues which are determined by the "layout number" 874219089Spjd */ 875219089Spjd 876219089Spjd#define SA_MAGIC 0x2F505A /* ZFS SA */ 877219089Spjdtypedef struct sa_hdr_phys { 878219089Spjd uint32_t sa_magic; 879219089Spjd uint16_t sa_layout_info; /* Encoded with hdrsize and layout number */ 880219089Spjd uint16_t sa_lengths[1]; /* optional sizes for variable length attrs */ 881219089Spjd /* ... Data follows the lengths. */ 882219089Spjd} sa_hdr_phys_t; 883219089Spjd 884219089Spjd/* 885219089Spjd * sa_hdr_phys -> sa_layout_info 886219089Spjd * 887219089Spjd * 16 10 0 888219089Spjd * +--------+-------+ 889219089Spjd * | hdrsz |layout | 890219089Spjd * +--------+-------+ 891219089Spjd * 892219089Spjd * Bits 0-10 are the layout number 893219089Spjd * Bits 11-16 are the size of the header. 894219089Spjd * The hdrsize is the number * 8 895219089Spjd * 896219089Spjd * For example. 897219089Spjd * hdrsz of 1 ==> 8 byte header 898219089Spjd * 2 ==> 16 byte header 899219089Spjd * 900219089Spjd */ 901219089Spjd 902219089Spjd#define SA_HDR_LAYOUT_NUM(hdr) BF32_GET(hdr->sa_layout_info, 0, 10) 903219089Spjd#define SA_HDR_SIZE(hdr) BF32_GET_SB(hdr->sa_layout_info, 10, 16, 3, 0) 904219089Spjd#define SA_HDR_LAYOUT_INFO_ENCODE(x, num, size) \ 905219089Spjd{ \ 906219089Spjd BF32_SET_SB(x, 10, 6, 3, 0, size); \ 907219089Spjd BF32_SET(x, 0, 10, num); \ 908219089Spjd} 909219089Spjd 910219089Spjd#define SA_MODE_OFFSET 0 911219089Spjd#define SA_SIZE_OFFSET 8 912219089Spjd#define SA_GEN_OFFSET 16 913219089Spjd#define SA_UID_OFFSET 24 914219089Spjd#define SA_GID_OFFSET 32 915219089Spjd#define SA_PARENT_OFFSET 40 916219089Spjd 917219089Spjd/* 918185029Spjd * Intent log header - this on disk structure holds fields to manage 919185029Spjd * the log. All fields are 64 bit to easily handle cross architectures. 920185029Spjd */ 921185029Spjdtypedef struct zil_header { 922185029Spjd uint64_t zh_claim_txg; /* txg in which log blocks were claimed */ 923185029Spjd uint64_t zh_replay_seq; /* highest replayed sequence number */ 924185029Spjd blkptr_t zh_log; /* log chain */ 925185029Spjd uint64_t zh_claim_seq; /* highest claimed sequence number */ 926185029Spjd uint64_t zh_pad[5]; 927185029Spjd} zil_header_t; 928185029Spjd 929219089Spjd#define OBJSET_PHYS_SIZE 2048 930219089Spjd 931185029Spjdtypedef struct objset_phys { 932185029Spjd dnode_phys_t os_meta_dnode; 933185029Spjd zil_header_t os_zil_header; 934185029Spjd uint64_t os_type; 935209962Smm uint64_t os_flags; 936219089Spjd char os_pad[OBJSET_PHYS_SIZE - sizeof (dnode_phys_t)*3 - 937209962Smm sizeof (zil_header_t) - sizeof (uint64_t)*2]; 938209962Smm dnode_phys_t os_userused_dnode; 939209962Smm dnode_phys_t os_groupused_dnode; 940185029Spjd} objset_phys_t; 941185029Spjd 942185029Spjdtypedef struct dsl_dir_phys { 943185029Spjd uint64_t dd_creation_time; /* not actually used */ 944185029Spjd uint64_t dd_head_dataset_obj; 945185029Spjd uint64_t dd_parent_obj; 946185029Spjd uint64_t dd_clone_parent_obj; 947185029Spjd uint64_t dd_child_dir_zapobj; 948185029Spjd /* 949185029Spjd * how much space our children are accounting for; for leaf 950185029Spjd * datasets, == physical space used by fs + snaps 951185029Spjd */ 952185029Spjd uint64_t dd_used_bytes; 953185029Spjd uint64_t dd_compressed_bytes; 954185029Spjd uint64_t dd_uncompressed_bytes; 955185029Spjd /* Administrative quota setting */ 956185029Spjd uint64_t dd_quota; 957185029Spjd /* Administrative reservation setting */ 958185029Spjd uint64_t dd_reserved; 959185029Spjd uint64_t dd_props_zapobj; 960185029Spjd uint64_t dd_pad[21]; /* pad out to 256 bytes for good measure */ 961185029Spjd} dsl_dir_phys_t; 962185029Spjd 963185029Spjdtypedef struct dsl_dataset_phys { 964185029Spjd uint64_t ds_dir_obj; 965185029Spjd uint64_t ds_prev_snap_obj; 966185029Spjd uint64_t ds_prev_snap_txg; 967185029Spjd uint64_t ds_next_snap_obj; 968185029Spjd uint64_t ds_snapnames_zapobj; /* zap obj of snaps; ==0 for snaps */ 969185029Spjd uint64_t ds_num_children; /* clone/snap children; ==0 for head */ 970185029Spjd uint64_t ds_creation_time; /* seconds since 1970 */ 971185029Spjd uint64_t ds_creation_txg; 972185029Spjd uint64_t ds_deadlist_obj; 973185029Spjd uint64_t ds_used_bytes; 974185029Spjd uint64_t ds_compressed_bytes; 975185029Spjd uint64_t ds_uncompressed_bytes; 976185029Spjd uint64_t ds_unique_bytes; /* only relevant to snapshots */ 977185029Spjd /* 978185029Spjd * The ds_fsid_guid is a 56-bit ID that can change to avoid 979185029Spjd * collisions. The ds_guid is a 64-bit ID that will never 980185029Spjd * change, so there is a small probability that it will collide. 981185029Spjd */ 982185029Spjd uint64_t ds_fsid_guid; 983185029Spjd uint64_t ds_guid; 984185029Spjd uint64_t ds_flags; 985185029Spjd blkptr_t ds_bp; 986185029Spjd uint64_t ds_pad[8]; /* pad out to 320 bytes for good measure */ 987185029Spjd} dsl_dataset_phys_t; 988185029Spjd 989185029Spjd/* 990185029Spjd * The names of zap entries in the DIRECTORY_OBJECT of the MOS. 991185029Spjd */ 992185029Spjd#define DMU_POOL_DIRECTORY_OBJECT 1 993185029Spjd#define DMU_POOL_CONFIG "config" 994185029Spjd#define DMU_POOL_ROOT_DATASET "root_dataset" 995185029Spjd#define DMU_POOL_SYNC_BPLIST "sync_bplist" 996185029Spjd#define DMU_POOL_ERRLOG_SCRUB "errlog_scrub" 997185029Spjd#define DMU_POOL_ERRLOG_LAST "errlog_last" 998185029Spjd#define DMU_POOL_SPARES "spares" 999185029Spjd#define DMU_POOL_DEFLATE "deflate" 1000185029Spjd#define DMU_POOL_HISTORY "history" 1001185029Spjd#define DMU_POOL_PROPS "pool_props" 1002185029Spjd 1003185029Spjd#define ZAP_MAGIC 0x2F52AB2ABULL 1004185029Spjd 1005185029Spjd#define FZAP_BLOCK_SHIFT(zap) ((zap)->zap_block_shift) 1006185029Spjd 1007185029Spjd#define ZAP_MAXCD (uint32_t)(-1) 1008185029Spjd#define ZAP_HASHBITS 28 1009185029Spjd#define MZAP_ENT_LEN 64 1010185029Spjd#define MZAP_NAME_LEN (MZAP_ENT_LEN - 8 - 4 - 2) 1011185029Spjd#define MZAP_MAX_BLKSHIFT SPA_MAXBLOCKSHIFT 1012185029Spjd#define MZAP_MAX_BLKSZ (1 << MZAP_MAX_BLKSHIFT) 1013185029Spjd 1014185029Spjdtypedef struct mzap_ent_phys { 1015185029Spjd uint64_t mze_value; 1016185029Spjd uint32_t mze_cd; 1017185029Spjd uint16_t mze_pad; /* in case we want to chain them someday */ 1018185029Spjd char mze_name[MZAP_NAME_LEN]; 1019185029Spjd} mzap_ent_phys_t; 1020185029Spjd 1021185029Spjdtypedef struct mzap_phys { 1022185029Spjd uint64_t mz_block_type; /* ZBT_MICRO */ 1023185029Spjd uint64_t mz_salt; 1024185029Spjd uint64_t mz_pad[6]; 1025185029Spjd mzap_ent_phys_t mz_chunk[1]; 1026185029Spjd /* actually variable size depending on block size */ 1027185029Spjd} mzap_phys_t; 1028185029Spjd 1029185029Spjd/* 1030185029Spjd * The (fat) zap is stored in one object. It is an array of 1031185029Spjd * 1<<FZAP_BLOCK_SHIFT byte blocks. The layout looks like one of: 1032185029Spjd * 1033185029Spjd * ptrtbl fits in first block: 1034185029Spjd * [zap_phys_t zap_ptrtbl_shift < 6] [zap_leaf_t] ... 1035185029Spjd * 1036185029Spjd * ptrtbl too big for first block: 1037185029Spjd * [zap_phys_t zap_ptrtbl_shift >= 6] [zap_leaf_t] [ptrtbl] ... 1038185029Spjd * 1039185029Spjd */ 1040185029Spjd 1041185029Spjd#define ZBT_LEAF ((1ULL << 63) + 0) 1042185029Spjd#define ZBT_HEADER ((1ULL << 63) + 1) 1043185029Spjd#define ZBT_MICRO ((1ULL << 63) + 3) 1044185029Spjd/* any other values are ptrtbl blocks */ 1045185029Spjd 1046185029Spjd/* 1047185029Spjd * the embedded pointer table takes up half a block: 1048185029Spjd * block size / entry size (2^3) / 2 1049185029Spjd */ 1050185029Spjd#define ZAP_EMBEDDED_PTRTBL_SHIFT(zap) (FZAP_BLOCK_SHIFT(zap) - 3 - 1) 1051185029Spjd 1052185029Spjd/* 1053185029Spjd * The embedded pointer table starts half-way through the block. Since 1054185029Spjd * the pointer table itself is half the block, it starts at (64-bit) 1055185029Spjd * word number (1<<ZAP_EMBEDDED_PTRTBL_SHIFT(zap)). 1056185029Spjd */ 1057185029Spjd#define ZAP_EMBEDDED_PTRTBL_ENT(zap, idx) \ 1058185029Spjd ((uint64_t *)(zap)->zap_phys) \ 1059185029Spjd [(idx) + (1<<ZAP_EMBEDDED_PTRTBL_SHIFT(zap))] 1060185029Spjd 1061185029Spjd/* 1062185029Spjd * TAKE NOTE: 1063185029Spjd * If zap_phys_t is modified, zap_byteswap() must be modified. 1064185029Spjd */ 1065185029Spjdtypedef struct zap_phys { 1066185029Spjd uint64_t zap_block_type; /* ZBT_HEADER */ 1067185029Spjd uint64_t zap_magic; /* ZAP_MAGIC */ 1068185029Spjd 1069185029Spjd struct zap_table_phys { 1070185029Spjd uint64_t zt_blk; /* starting block number */ 1071185029Spjd uint64_t zt_numblks; /* number of blocks */ 1072185029Spjd uint64_t zt_shift; /* bits to index it */ 1073185029Spjd uint64_t zt_nextblk; /* next (larger) copy start block */ 1074185029Spjd uint64_t zt_blks_copied; /* number source blocks copied */ 1075185029Spjd } zap_ptrtbl; 1076185029Spjd 1077185029Spjd uint64_t zap_freeblk; /* the next free block */ 1078185029Spjd uint64_t zap_num_leafs; /* number of leafs */ 1079185029Spjd uint64_t zap_num_entries; /* number of entries */ 1080185029Spjd uint64_t zap_salt; /* salt to stir into hash function */ 1081185029Spjd /* 1082185029Spjd * This structure is followed by padding, and then the embedded 1083185029Spjd * pointer table. The embedded pointer table takes up second 1084185029Spjd * half of the block. It is accessed using the 1085185029Spjd * ZAP_EMBEDDED_PTRTBL_ENT() macro. 1086185029Spjd */ 1087185029Spjd} zap_phys_t; 1088185029Spjd 1089185029Spjdtypedef struct zap_table_phys zap_table_phys_t; 1090185029Spjd 1091185029Spjdtypedef struct fat_zap { 1092185029Spjd int zap_block_shift; /* block size shift */ 1093185029Spjd zap_phys_t *zap_phys; 1094185029Spjd} fat_zap_t; 1095185029Spjd 1096185029Spjd#define ZAP_LEAF_MAGIC 0x2AB1EAF 1097185029Spjd 1098185029Spjd/* chunk size = 24 bytes */ 1099185029Spjd#define ZAP_LEAF_CHUNKSIZE 24 1100185029Spjd 1101185029Spjd/* 1102185029Spjd * The amount of space available for chunks is: 1103185029Spjd * block size (1<<l->l_bs) - hash entry size (2) * number of hash 1104185029Spjd * entries - header space (2*chunksize) 1105185029Spjd */ 1106185029Spjd#define ZAP_LEAF_NUMCHUNKS(l) \ 1107185029Spjd (((1<<(l)->l_bs) - 2*ZAP_LEAF_HASH_NUMENTRIES(l)) / \ 1108185029Spjd ZAP_LEAF_CHUNKSIZE - 2) 1109185029Spjd 1110185029Spjd/* 1111185029Spjd * The amount of space within the chunk available for the array is: 1112185029Spjd * chunk size - space for type (1) - space for next pointer (2) 1113185029Spjd */ 1114185029Spjd#define ZAP_LEAF_ARRAY_BYTES (ZAP_LEAF_CHUNKSIZE - 3) 1115185029Spjd 1116185029Spjd#define ZAP_LEAF_ARRAY_NCHUNKS(bytes) \ 1117185029Spjd (((bytes)+ZAP_LEAF_ARRAY_BYTES-1)/ZAP_LEAF_ARRAY_BYTES) 1118185029Spjd 1119185029Spjd/* 1120185029Spjd * Low water mark: when there are only this many chunks free, start 1121185029Spjd * growing the ptrtbl. Ideally, this should be larger than a 1122185029Spjd * "reasonably-sized" entry. 20 chunks is more than enough for the 1123185029Spjd * largest directory entry (MAXNAMELEN (256) byte name, 8-byte value), 1124185029Spjd * while still being only around 3% for 16k blocks. 1125185029Spjd */ 1126185029Spjd#define ZAP_LEAF_LOW_WATER (20) 1127185029Spjd 1128185029Spjd/* 1129185029Spjd * The leaf hash table has block size / 2^5 (32) number of entries, 1130185029Spjd * which should be more than enough for the maximum number of entries, 1131185029Spjd * which is less than block size / CHUNKSIZE (24) / minimum number of 1132185029Spjd * chunks per entry (3). 1133185029Spjd */ 1134185029Spjd#define ZAP_LEAF_HASH_SHIFT(l) ((l)->l_bs - 5) 1135185029Spjd#define ZAP_LEAF_HASH_NUMENTRIES(l) (1 << ZAP_LEAF_HASH_SHIFT(l)) 1136185029Spjd 1137185029Spjd/* 1138185029Spjd * The chunks start immediately after the hash table. The end of the 1139185029Spjd * hash table is at l_hash + HASH_NUMENTRIES, which we simply cast to a 1140185029Spjd * chunk_t. 1141185029Spjd */ 1142185029Spjd#define ZAP_LEAF_CHUNK(l, idx) \ 1143185029Spjd ((zap_leaf_chunk_t *) \ 1144185029Spjd ((l)->l_phys->l_hash + ZAP_LEAF_HASH_NUMENTRIES(l)))[idx] 1145185029Spjd#define ZAP_LEAF_ENTRY(l, idx) (&ZAP_LEAF_CHUNK(l, idx).l_entry) 1146185029Spjd 1147185029Spjdtypedef enum zap_chunk_type { 1148185029Spjd ZAP_CHUNK_FREE = 253, 1149185029Spjd ZAP_CHUNK_ENTRY = 252, 1150185029Spjd ZAP_CHUNK_ARRAY = 251, 1151185029Spjd ZAP_CHUNK_TYPE_MAX = 250 1152185029Spjd} zap_chunk_type_t; 1153185029Spjd 1154185029Spjd/* 1155185029Spjd * TAKE NOTE: 1156185029Spjd * If zap_leaf_phys_t is modified, zap_leaf_byteswap() must be modified. 1157185029Spjd */ 1158185029Spjdtypedef struct zap_leaf_phys { 1159185029Spjd struct zap_leaf_header { 1160185029Spjd uint64_t lh_block_type; /* ZBT_LEAF */ 1161185029Spjd uint64_t lh_pad1; 1162185029Spjd uint64_t lh_prefix; /* hash prefix of this leaf */ 1163185029Spjd uint32_t lh_magic; /* ZAP_LEAF_MAGIC */ 1164185029Spjd uint16_t lh_nfree; /* number free chunks */ 1165185029Spjd uint16_t lh_nentries; /* number of entries */ 1166185029Spjd uint16_t lh_prefix_len; /* num bits used to id this */ 1167185029Spjd 1168185029Spjd/* above is accessable to zap, below is zap_leaf private */ 1169185029Spjd 1170185029Spjd uint16_t lh_freelist; /* chunk head of free list */ 1171185029Spjd uint8_t lh_pad2[12]; 1172185029Spjd } l_hdr; /* 2 24-byte chunks */ 1173185029Spjd 1174185029Spjd /* 1175185029Spjd * The header is followed by a hash table with 1176185029Spjd * ZAP_LEAF_HASH_NUMENTRIES(zap) entries. The hash table is 1177185029Spjd * followed by an array of ZAP_LEAF_NUMCHUNKS(zap) 1178185029Spjd * zap_leaf_chunk structures. These structures are accessed 1179185029Spjd * with the ZAP_LEAF_CHUNK() macro. 1180185029Spjd */ 1181185029Spjd 1182185029Spjd uint16_t l_hash[1]; 1183185029Spjd} zap_leaf_phys_t; 1184185029Spjd 1185185029Spjdtypedef union zap_leaf_chunk { 1186185029Spjd struct zap_leaf_entry { 1187185029Spjd uint8_t le_type; /* always ZAP_CHUNK_ENTRY */ 1188240356Savg uint8_t le_value_intlen; /* size of ints */ 1189185029Spjd uint16_t le_next; /* next entry in hash chain */ 1190185029Spjd uint16_t le_name_chunk; /* first chunk of the name */ 1191240356Savg uint16_t le_name_numints; /* bytes in name, incl null */ 1192185029Spjd uint16_t le_value_chunk; /* first chunk of the value */ 1193240356Savg uint16_t le_value_numints; /* value length in ints */ 1194185029Spjd uint32_t le_cd; /* collision differentiator */ 1195185029Spjd uint64_t le_hash; /* hash value of the name */ 1196185029Spjd } l_entry; 1197185029Spjd struct zap_leaf_array { 1198185029Spjd uint8_t la_type; /* always ZAP_CHUNK_ARRAY */ 1199185029Spjd uint8_t la_array[ZAP_LEAF_ARRAY_BYTES]; 1200185029Spjd uint16_t la_next; /* next blk or CHAIN_END */ 1201185029Spjd } l_array; 1202185029Spjd struct zap_leaf_free { 1203185029Spjd uint8_t lf_type; /* always ZAP_CHUNK_FREE */ 1204185029Spjd uint8_t lf_pad[ZAP_LEAF_ARRAY_BYTES]; 1205185029Spjd uint16_t lf_next; /* next in free list, or CHAIN_END */ 1206185029Spjd } l_free; 1207185029Spjd} zap_leaf_chunk_t; 1208185029Spjd 1209185029Spjdtypedef struct zap_leaf { 1210185029Spjd int l_bs; /* block size shift */ 1211185029Spjd zap_leaf_phys_t *l_phys; 1212185029Spjd} zap_leaf_t; 1213185029Spjd 1214185029Spjd/* 1215185029Spjd * Define special zfs pflags 1216185029Spjd */ 1217185029Spjd#define ZFS_XATTR 0x1 /* is an extended attribute */ 1218185029Spjd#define ZFS_INHERIT_ACE 0x2 /* ace has inheritable ACEs */ 1219185029Spjd#define ZFS_ACL_TRIVIAL 0x4 /* files ACL is trivial */ 1220185029Spjd 1221185029Spjd#define MASTER_NODE_OBJ 1 1222185029Spjd 1223185029Spjd/* 1224185029Spjd * special attributes for master node. 1225185029Spjd */ 1226185029Spjd 1227185029Spjd#define ZFS_FSID "FSID" 1228185029Spjd#define ZFS_UNLINKED_SET "DELETE_QUEUE" 1229185029Spjd#define ZFS_ROOT_OBJ "ROOT" 1230185029Spjd#define ZPL_VERSION_OBJ "VERSION" 1231185029Spjd#define ZFS_PROP_BLOCKPERPAGE "BLOCKPERPAGE" 1232185029Spjd#define ZFS_PROP_NOGROWBLOCKS "NOGROWBLOCKS" 1233185029Spjd 1234185029Spjd#define ZFS_FLAG_BLOCKPERPAGE 0x1 1235185029Spjd#define ZFS_FLAG_NOGROWBLOCKS 0x2 1236185029Spjd 1237185029Spjd/* 1238185029Spjd * ZPL version - rev'd whenever an incompatible on-disk format change 1239185029Spjd * occurs. Independent of SPA/DMU/ZAP versioning. 1240185029Spjd */ 1241185029Spjd 1242185029Spjd#define ZPL_VERSION 1ULL 1243185029Spjd 1244185029Spjd/* 1245185029Spjd * The directory entry has the type (currently unused on Solaris) in the 1246185029Spjd * top 4 bits, and the object number in the low 48 bits. The "middle" 1247185029Spjd * 12 bits are unused. 1248185029Spjd */ 1249185029Spjd#define ZFS_DIRENT_TYPE(de) BF64_GET(de, 60, 4) 1250185029Spjd#define ZFS_DIRENT_OBJ(de) BF64_GET(de, 0, 48) 1251185029Spjd#define ZFS_DIRENT_MAKE(type, obj) (((uint64_t)type << 60) | obj) 1252185029Spjd 1253185029Spjdtypedef struct ace { 1254185029Spjd uid_t a_who; /* uid or gid */ 1255185029Spjd uint32_t a_access_mask; /* read,write,... */ 1256185029Spjd uint16_t a_flags; /* see below */ 1257185029Spjd uint16_t a_type; /* allow or deny */ 1258185029Spjd} ace_t; 1259185029Spjd 1260185029Spjd#define ACE_SLOT_CNT 6 1261185029Spjd 1262185029Spjdtypedef struct zfs_znode_acl { 1263185029Spjd uint64_t z_acl_extern_obj; /* ext acl pieces */ 1264185029Spjd uint32_t z_acl_count; /* Number of ACEs */ 1265185029Spjd uint16_t z_acl_version; /* acl version */ 1266185029Spjd uint16_t z_acl_pad; /* pad */ 1267185029Spjd ace_t z_ace_data[ACE_SLOT_CNT]; /* 6 standard ACEs */ 1268185029Spjd} zfs_znode_acl_t; 1269185029Spjd 1270185029Spjd/* 1271185029Spjd * This is the persistent portion of the znode. It is stored 1272185029Spjd * in the "bonus buffer" of the file. Short symbolic links 1273185029Spjd * are also stored in the bonus buffer. 1274185029Spjd */ 1275185029Spjdtypedef struct znode_phys { 1276185029Spjd uint64_t zp_atime[2]; /* 0 - last file access time */ 1277185029Spjd uint64_t zp_mtime[2]; /* 16 - last file modification time */ 1278185029Spjd uint64_t zp_ctime[2]; /* 32 - last file change time */ 1279185029Spjd uint64_t zp_crtime[2]; /* 48 - creation time */ 1280185029Spjd uint64_t zp_gen; /* 64 - generation (txg of creation) */ 1281185029Spjd uint64_t zp_mode; /* 72 - file mode bits */ 1282185029Spjd uint64_t zp_size; /* 80 - size of file */ 1283185029Spjd uint64_t zp_parent; /* 88 - directory parent (`..') */ 1284185029Spjd uint64_t zp_links; /* 96 - number of links to file */ 1285185029Spjd uint64_t zp_xattr; /* 104 - DMU object for xattrs */ 1286185029Spjd uint64_t zp_rdev; /* 112 - dev_t for VBLK & VCHR files */ 1287185029Spjd uint64_t zp_flags; /* 120 - persistent flags */ 1288185029Spjd uint64_t zp_uid; /* 128 - file owner */ 1289185029Spjd uint64_t zp_gid; /* 136 - owning group */ 1290185029Spjd uint64_t zp_pad[4]; /* 144 - future */ 1291185029Spjd zfs_znode_acl_t zp_acl; /* 176 - 263 ACL */ 1292185029Spjd /* 1293185029Spjd * Data may pad out any remaining bytes in the znode buffer, eg: 1294185029Spjd * 1295185029Spjd * |<---------------------- dnode_phys (512) ------------------------>| 1296185029Spjd * |<-- dnode (192) --->|<----------- "bonus" buffer (320) ---------->| 1297185029Spjd * |<---- znode (264) ---->|<---- data (56) ---->| 1298185029Spjd * 1299185029Spjd * At present, we only use this space to store symbolic links. 1300185029Spjd */ 1301185029Spjd} znode_phys_t; 1302185029Spjd 1303185029Spjd/* 1304185029Spjd * In-core vdev representation. 1305185029Spjd */ 1306185029Spjdstruct vdev; 1307192194Sdfrtypedef int vdev_phys_read_t(struct vdev *vdev, void *priv, 1308192194Sdfr off_t offset, void *buf, size_t bytes); 1309192194Sdfrtypedef int vdev_read_t(struct vdev *vdev, const blkptr_t *bp, 1310192194Sdfr void *buf, off_t offset, size_t bytes); 1311185029Spjd 1312185029Spjdtypedef STAILQ_HEAD(vdev_list, vdev) vdev_list_t; 1313185029Spjd 1314185029Spjdtypedef struct vdev { 1315185029Spjd STAILQ_ENTRY(vdev) v_childlink; /* link in parent's child list */ 1316185029Spjd STAILQ_ENTRY(vdev) v_alllink; /* link in global vdev list */ 1317185029Spjd vdev_list_t v_children; /* children of this vdev */ 1318219089Spjd const char *v_name; /* vdev name */ 1319185029Spjd uint64_t v_guid; /* vdev guid */ 1320185029Spjd int v_id; /* index in parent */ 1321192194Sdfr int v_ashift; /* offset to block shift */ 1322192194Sdfr int v_nparity; /* # parity for raidz */ 1323219089Spjd struct vdev *v_top; /* parent vdev */ 1324192194Sdfr int v_nchildren; /* # children */ 1325185029Spjd vdev_state_t v_state; /* current state */ 1326192194Sdfr vdev_phys_read_t *v_phys_read; /* read from raw leaf vdev */ 1327192194Sdfr vdev_read_t *v_read; /* read from vdev */ 1328185029Spjd void *v_read_priv; /* private data for read function */ 1329185029Spjd} vdev_t; 1330185029Spjd 1331185029Spjd/* 1332185029Spjd * In-core pool representation. 1333185029Spjd */ 1334185029Spjdtypedef STAILQ_HEAD(spa_list, spa) spa_list_t; 1335185029Spjd 1336185029Spjdtypedef struct spa { 1337185029Spjd STAILQ_ENTRY(spa) spa_link; /* link in global pool list */ 1338185029Spjd char *spa_name; /* pool name */ 1339185029Spjd uint64_t spa_guid; /* pool guid */ 1340185029Spjd uint64_t spa_txg; /* most recent transaction */ 1341185029Spjd struct uberblock spa_uberblock; /* best uberblock so far */ 1342185029Spjd vdev_list_t spa_vdevs; /* list of all toplevel vdevs */ 1343185029Spjd objset_phys_t spa_mos; /* MOS for this pool */ 1344235343Savg int spa_inited; /* initialized */ 1345185029Spjd} spa_t; 1346