zfsimpl.h revision 235343
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 */ 55185029Spjd 56185029Spjd/* CRC64 table */ 57185029Spjd#define ZFS_CRC64_POLY 0xC96C5795D7870F42ULL /* ECMA-182, reflected form */ 58185029Spjd 59185029Spjd/* 60185029Spjd * Macros for various sorts of alignment and rounding when the alignment 61185029Spjd * is known to be a power of 2. 62185029Spjd */ 63185029Spjd#define P2ALIGN(x, align) ((x) & -(align)) 64185029Spjd#define P2PHASE(x, align) ((x) & ((align) - 1)) 65185029Spjd#define P2NPHASE(x, align) (-(x) & ((align) - 1)) 66185029Spjd#define P2ROUNDUP(x, align) (-(-(x) & -(align))) 67185029Spjd#define P2END(x, align) (-(~(x) & -(align))) 68185029Spjd#define P2PHASEUP(x, align, phase) ((phase) - (((phase) - (x)) & -(align))) 69208047Smm#define P2BOUNDARY(off, len, align) (((off) ^ ((off) + (len) - 1)) > (align) - 1) 70185029Spjd 71185029Spjd/* 72185029Spjd * General-purpose 32-bit and 64-bit bitfield encodings. 73185029Spjd */ 74185029Spjd#define BF32_DECODE(x, low, len) P2PHASE((x) >> (low), 1U << (len)) 75185029Spjd#define BF64_DECODE(x, low, len) P2PHASE((x) >> (low), 1ULL << (len)) 76185029Spjd#define BF32_ENCODE(x, low, len) (P2PHASE((x), 1U << (len)) << (low)) 77185029Spjd#define BF64_ENCODE(x, low, len) (P2PHASE((x), 1ULL << (len)) << (low)) 78185029Spjd 79185029Spjd#define BF32_GET(x, low, len) BF32_DECODE(x, low, len) 80185029Spjd#define BF64_GET(x, low, len) BF64_DECODE(x, low, len) 81185029Spjd 82185029Spjd#define BF32_SET(x, low, len, val) \ 83185029Spjd ((x) ^= BF32_ENCODE((x >> low) ^ (val), low, len)) 84185029Spjd#define BF64_SET(x, low, len, val) \ 85185029Spjd ((x) ^= BF64_ENCODE((x >> low) ^ (val), low, len)) 86185029Spjd 87185029Spjd#define BF32_GET_SB(x, low, len, shift, bias) \ 88185029Spjd ((BF32_GET(x, low, len) + (bias)) << (shift)) 89185029Spjd#define BF64_GET_SB(x, low, len, shift, bias) \ 90185029Spjd ((BF64_GET(x, low, len) + (bias)) << (shift)) 91185029Spjd 92185029Spjd#define BF32_SET_SB(x, low, len, shift, bias, val) \ 93185029Spjd BF32_SET(x, low, len, ((val) >> (shift)) - (bias)) 94185029Spjd#define BF64_SET_SB(x, low, len, shift, bias, val) \ 95185029Spjd BF64_SET(x, low, len, ((val) >> (shift)) - (bias)) 96185029Spjd 97185029Spjd/* 98219089Spjd * Macros to reverse byte order 99219089Spjd */ 100219089Spjd#define BSWAP_8(x) ((x) & 0xff) 101219089Spjd#define BSWAP_16(x) ((BSWAP_8(x) << 8) | BSWAP_8((x) >> 8)) 102219089Spjd#define BSWAP_32(x) ((BSWAP_16(x) << 16) | BSWAP_16((x) >> 16)) 103219089Spjd#define BSWAP_64(x) ((BSWAP_32(x) << 32) | BSWAP_32((x) >> 32)) 104219089Spjd 105219089Spjd/* 106185029Spjd * We currently support nine block sizes, from 512 bytes to 128K. 107185029Spjd * We could go higher, but the benefits are near-zero and the cost 108185029Spjd * of COWing a giant block to modify one byte would become excessive. 109185029Spjd */ 110185029Spjd#define SPA_MINBLOCKSHIFT 9 111185029Spjd#define SPA_MAXBLOCKSHIFT 17 112185029Spjd#define SPA_MINBLOCKSIZE (1ULL << SPA_MINBLOCKSHIFT) 113185029Spjd#define SPA_MAXBLOCKSIZE (1ULL << SPA_MAXBLOCKSHIFT) 114185029Spjd 115185029Spjd#define SPA_BLOCKSIZES (SPA_MAXBLOCKSHIFT - SPA_MINBLOCKSHIFT + 1) 116185029Spjd 117185029Spjd/* 118185029Spjd * The DVA size encodings for LSIZE and PSIZE support blocks up to 32MB. 119185029Spjd * The ASIZE encoding should be at least 64 times larger (6 more bits) 120185029Spjd * to support up to 4-way RAID-Z mirror mode with worst-case gang block 121185029Spjd * overhead, three DVAs per bp, plus one more bit in case we do anything 122185029Spjd * else that expands the ASIZE. 123185029Spjd */ 124185029Spjd#define SPA_LSIZEBITS 16 /* LSIZE up to 32M (2^16 * 512) */ 125185029Spjd#define SPA_PSIZEBITS 16 /* PSIZE up to 32M (2^16 * 512) */ 126185029Spjd#define SPA_ASIZEBITS 24 /* ASIZE up to 64 times larger */ 127185029Spjd 128185029Spjd/* 129185029Spjd * All SPA data is represented by 128-bit data virtual addresses (DVAs). 130185029Spjd * The members of the dva_t should be considered opaque outside the SPA. 131185029Spjd */ 132185029Spjdtypedef struct dva { 133185029Spjd uint64_t dva_word[2]; 134185029Spjd} dva_t; 135185029Spjd 136185029Spjd/* 137185029Spjd * Each block has a 256-bit checksum -- strong enough for cryptographic hashes. 138185029Spjd */ 139185029Spjdtypedef struct zio_cksum { 140185029Spjd uint64_t zc_word[4]; 141185029Spjd} zio_cksum_t; 142185029Spjd 143185029Spjd/* 144185029Spjd * Each block is described by its DVAs, time of birth, checksum, etc. 145185029Spjd * The word-by-word, bit-by-bit layout of the blkptr is as follows: 146185029Spjd * 147185029Spjd * 64 56 48 40 32 24 16 8 0 148185029Spjd * +-------+-------+-------+-------+-------+-------+-------+-------+ 149185029Spjd * 0 | vdev1 | GRID | ASIZE | 150185029Spjd * +-------+-------+-------+-------+-------+-------+-------+-------+ 151185029Spjd * 1 |G| offset1 | 152185029Spjd * +-------+-------+-------+-------+-------+-------+-------+-------+ 153185029Spjd * 2 | vdev2 | GRID | ASIZE | 154185029Spjd * +-------+-------+-------+-------+-------+-------+-------+-------+ 155185029Spjd * 3 |G| offset2 | 156185029Spjd * +-------+-------+-------+-------+-------+-------+-------+-------+ 157185029Spjd * 4 | vdev3 | GRID | ASIZE | 158185029Spjd * +-------+-------+-------+-------+-------+-------+-------+-------+ 159185029Spjd * 5 |G| offset3 | 160185029Spjd * +-------+-------+-------+-------+-------+-------+-------+-------+ 161219089Spjd * 6 |BDX|lvl| type | cksum | comp | PSIZE | LSIZE | 162185029Spjd * +-------+-------+-------+-------+-------+-------+-------+-------+ 163185029Spjd * 7 | padding | 164185029Spjd * +-------+-------+-------+-------+-------+-------+-------+-------+ 165185029Spjd * 8 | padding | 166185029Spjd * +-------+-------+-------+-------+-------+-------+-------+-------+ 167219089Spjd * 9 | physical birth txg | 168185029Spjd * +-------+-------+-------+-------+-------+-------+-------+-------+ 169219089Spjd * a | logical birth txg | 170185029Spjd * +-------+-------+-------+-------+-------+-------+-------+-------+ 171185029Spjd * b | fill count | 172185029Spjd * +-------+-------+-------+-------+-------+-------+-------+-------+ 173185029Spjd * c | checksum[0] | 174185029Spjd * +-------+-------+-------+-------+-------+-------+-------+-------+ 175185029Spjd * d | checksum[1] | 176185029Spjd * +-------+-------+-------+-------+-------+-------+-------+-------+ 177185029Spjd * e | checksum[2] | 178185029Spjd * +-------+-------+-------+-------+-------+-------+-------+-------+ 179185029Spjd * f | checksum[3] | 180185029Spjd * +-------+-------+-------+-------+-------+-------+-------+-------+ 181185029Spjd * 182185029Spjd * Legend: 183185029Spjd * 184185029Spjd * vdev virtual device ID 185185029Spjd * offset offset into virtual device 186185029Spjd * LSIZE logical size 187185029Spjd * PSIZE physical size (after compression) 188185029Spjd * ASIZE allocated size (including RAID-Z parity and gang block headers) 189185029Spjd * GRID RAID-Z layout information (reserved for future use) 190185029Spjd * cksum checksum function 191185029Spjd * comp compression function 192185029Spjd * G gang block indicator 193219089Spjd * B byteorder (endianness) 194219089Spjd * D dedup 195219089Spjd * X unused 196219089Spjd * lvl level of indirection 197185029Spjd * type DMU object type 198219089Spjd * phys birth txg of block allocation; zero if same as logical birth txg 199219089Spjd * log. birth transaction group in which the block was logically born 200185029Spjd * fill count number of non-zero blocks under this bp 201185029Spjd * checksum[4] 256-bit checksum of the data this bp describes 202185029Spjd */ 203219089Spjd#define SPA_BLKPTRSHIFT 7 /* blkptr_t is 128 bytes */ 204219089Spjd#define SPA_DVAS_PER_BP 3 /* Number of DVAs in a bp */ 205219089Spjd 206185029Spjdtypedef struct blkptr { 207219089Spjd dva_t blk_dva[SPA_DVAS_PER_BP]; /* Data Virtual Addresses */ 208219089Spjd uint64_t blk_prop; /* size, compression, type, etc */ 209219089Spjd uint64_t blk_pad[2]; /* Extra space for the future */ 210219089Spjd uint64_t blk_phys_birth; /* txg when block was allocated */ 211219089Spjd uint64_t blk_birth; /* transaction group at birth */ 212219089Spjd uint64_t blk_fill; /* fill count */ 213219089Spjd zio_cksum_t blk_cksum; /* 256-bit checksum */ 214185029Spjd} blkptr_t; 215185029Spjd 216185029Spjd/* 217185029Spjd * Macros to get and set fields in a bp or DVA. 218185029Spjd */ 219185029Spjd#define DVA_GET_ASIZE(dva) \ 220185029Spjd BF64_GET_SB((dva)->dva_word[0], 0, 24, SPA_MINBLOCKSHIFT, 0) 221185029Spjd#define DVA_SET_ASIZE(dva, x) \ 222185029Spjd BF64_SET_SB((dva)->dva_word[0], 0, 24, SPA_MINBLOCKSHIFT, 0, x) 223185029Spjd 224185029Spjd#define DVA_GET_GRID(dva) BF64_GET((dva)->dva_word[0], 24, 8) 225185029Spjd#define DVA_SET_GRID(dva, x) BF64_SET((dva)->dva_word[0], 24, 8, x) 226185029Spjd 227185029Spjd#define DVA_GET_VDEV(dva) BF64_GET((dva)->dva_word[0], 32, 32) 228185029Spjd#define DVA_SET_VDEV(dva, x) BF64_SET((dva)->dva_word[0], 32, 32, x) 229185029Spjd 230185029Spjd#define DVA_GET_OFFSET(dva) \ 231185029Spjd BF64_GET_SB((dva)->dva_word[1], 0, 63, SPA_MINBLOCKSHIFT, 0) 232185029Spjd#define DVA_SET_OFFSET(dva, x) \ 233185029Spjd BF64_SET_SB((dva)->dva_word[1], 0, 63, SPA_MINBLOCKSHIFT, 0, x) 234185029Spjd 235185029Spjd#define DVA_GET_GANG(dva) BF64_GET((dva)->dva_word[1], 63, 1) 236185029Spjd#define DVA_SET_GANG(dva, x) BF64_SET((dva)->dva_word[1], 63, 1, x) 237185029Spjd 238185029Spjd#define BP_GET_LSIZE(bp) \ 239185029Spjd (BP_IS_HOLE(bp) ? 0 : \ 240185029Spjd BF64_GET_SB((bp)->blk_prop, 0, 16, SPA_MINBLOCKSHIFT, 1)) 241185029Spjd#define BP_SET_LSIZE(bp, x) \ 242185029Spjd BF64_SET_SB((bp)->blk_prop, 0, 16, SPA_MINBLOCKSHIFT, 1, x) 243185029Spjd 244185029Spjd#define BP_GET_PSIZE(bp) \ 245185029Spjd BF64_GET_SB((bp)->blk_prop, 16, 16, SPA_MINBLOCKSHIFT, 1) 246185029Spjd#define BP_SET_PSIZE(bp, x) \ 247185029Spjd BF64_SET_SB((bp)->blk_prop, 16, 16, SPA_MINBLOCKSHIFT, 1, x) 248185029Spjd 249185029Spjd#define BP_GET_COMPRESS(bp) BF64_GET((bp)->blk_prop, 32, 8) 250185029Spjd#define BP_SET_COMPRESS(bp, x) BF64_SET((bp)->blk_prop, 32, 8, x) 251185029Spjd 252185029Spjd#define BP_GET_CHECKSUM(bp) BF64_GET((bp)->blk_prop, 40, 8) 253185029Spjd#define BP_SET_CHECKSUM(bp, x) BF64_SET((bp)->blk_prop, 40, 8, x) 254185029Spjd 255185029Spjd#define BP_GET_TYPE(bp) BF64_GET((bp)->blk_prop, 48, 8) 256185029Spjd#define BP_SET_TYPE(bp, x) BF64_SET((bp)->blk_prop, 48, 8, x) 257185029Spjd 258185029Spjd#define BP_GET_LEVEL(bp) BF64_GET((bp)->blk_prop, 56, 5) 259185029Spjd#define BP_SET_LEVEL(bp, x) BF64_SET((bp)->blk_prop, 56, 5, x) 260185029Spjd 261219089Spjd#define BP_GET_DEDUP(bp) BF64_GET((bp)->blk_prop, 62, 1) 262219089Spjd#define BP_SET_DEDUP(bp, x) BF64_SET((bp)->blk_prop, 62, 1, x) 263219089Spjd 264185029Spjd#define BP_GET_BYTEORDER(bp) (0 - BF64_GET((bp)->blk_prop, 63, 1)) 265185029Spjd#define BP_SET_BYTEORDER(bp, x) BF64_SET((bp)->blk_prop, 63, 1, x) 266185029Spjd 267219089Spjd#define BP_PHYSICAL_BIRTH(bp) \ 268219089Spjd ((bp)->blk_phys_birth ? (bp)->blk_phys_birth : (bp)->blk_birth) 269219089Spjd 270185029Spjd#define BP_GET_ASIZE(bp) \ 271185029Spjd (DVA_GET_ASIZE(&(bp)->blk_dva[0]) + DVA_GET_ASIZE(&(bp)->blk_dva[1]) + \ 272185029Spjd DVA_GET_ASIZE(&(bp)->blk_dva[2])) 273185029Spjd 274185029Spjd#define BP_GET_UCSIZE(bp) \ 275185029Spjd ((BP_GET_LEVEL(bp) > 0 || dmu_ot[BP_GET_TYPE(bp)].ot_metadata) ? \ 276185029Spjd BP_GET_PSIZE(bp) : BP_GET_LSIZE(bp)); 277185029Spjd 278185029Spjd#define BP_GET_NDVAS(bp) \ 279185029Spjd (!!DVA_GET_ASIZE(&(bp)->blk_dva[0]) + \ 280185029Spjd !!DVA_GET_ASIZE(&(bp)->blk_dva[1]) + \ 281185029Spjd !!DVA_GET_ASIZE(&(bp)->blk_dva[2])) 282185029Spjd 283185029Spjd#define BP_COUNT_GANG(bp) \ 284185029Spjd (DVA_GET_GANG(&(bp)->blk_dva[0]) + \ 285185029Spjd DVA_GET_GANG(&(bp)->blk_dva[1]) + \ 286185029Spjd DVA_GET_GANG(&(bp)->blk_dva[2])) 287185029Spjd 288185029Spjd#define DVA_EQUAL(dva1, dva2) \ 289185029Spjd ((dva1)->dva_word[1] == (dva2)->dva_word[1] && \ 290185029Spjd (dva1)->dva_word[0] == (dva2)->dva_word[0]) 291185029Spjd 292185029Spjd#define ZIO_CHECKSUM_EQUAL(zc1, zc2) \ 293185029Spjd (0 == (((zc1).zc_word[0] - (zc2).zc_word[0]) | \ 294185029Spjd ((zc1).zc_word[1] - (zc2).zc_word[1]) | \ 295185029Spjd ((zc1).zc_word[2] - (zc2).zc_word[2]) | \ 296185029Spjd ((zc1).zc_word[3] - (zc2).zc_word[3]))) 297185029Spjd 298185029Spjd 299185029Spjd#define DVA_IS_VALID(dva) (DVA_GET_ASIZE(dva) != 0) 300185029Spjd 301185029Spjd#define ZIO_SET_CHECKSUM(zcp, w0, w1, w2, w3) \ 302185029Spjd{ \ 303185029Spjd (zcp)->zc_word[0] = w0; \ 304185029Spjd (zcp)->zc_word[1] = w1; \ 305185029Spjd (zcp)->zc_word[2] = w2; \ 306185029Spjd (zcp)->zc_word[3] = w3; \ 307185029Spjd} 308185029Spjd 309185029Spjd#define BP_IDENTITY(bp) (&(bp)->blk_dva[0]) 310185029Spjd#define BP_IS_GANG(bp) DVA_GET_GANG(BP_IDENTITY(bp)) 311185029Spjd#define BP_IS_HOLE(bp) ((bp)->blk_birth == 0) 312185029Spjd#define BP_IS_OLDER(bp, txg) (!BP_IS_HOLE(bp) && (bp)->blk_birth < (txg)) 313185029Spjd 314185029Spjd#define BP_ZERO(bp) \ 315185029Spjd{ \ 316185029Spjd (bp)->blk_dva[0].dva_word[0] = 0; \ 317185029Spjd (bp)->blk_dva[0].dva_word[1] = 0; \ 318185029Spjd (bp)->blk_dva[1].dva_word[0] = 0; \ 319185029Spjd (bp)->blk_dva[1].dva_word[1] = 0; \ 320185029Spjd (bp)->blk_dva[2].dva_word[0] = 0; \ 321185029Spjd (bp)->blk_dva[2].dva_word[1] = 0; \ 322185029Spjd (bp)->blk_prop = 0; \ 323185029Spjd (bp)->blk_pad[0] = 0; \ 324185029Spjd (bp)->blk_pad[1] = 0; \ 325219089Spjd (bp)->blk_phys_birth = 0; \ 326185029Spjd (bp)->blk_birth = 0; \ 327185029Spjd (bp)->blk_fill = 0; \ 328185029Spjd ZIO_SET_CHECKSUM(&(bp)->blk_cksum, 0, 0, 0, 0); \ 329185029Spjd} 330185029Spjd 331219089Spjd/* 332219089Spjd * Embedded checksum 333219089Spjd */ 334219089Spjd#define ZEC_MAGIC 0x210da7ab10c7a11ULL 335185029Spjd 336219089Spjdtypedef struct zio_eck { 337219089Spjd uint64_t zec_magic; /* for validation, endianness */ 338219089Spjd zio_cksum_t zec_cksum; /* 256-bit checksum */ 339219089Spjd} zio_eck_t; 340185029Spjd 341219089Spjd/* 342219089Spjd * Gang block headers are self-checksumming and contain an array 343219089Spjd * of block pointers. 344219089Spjd */ 345219089Spjd#define SPA_GANGBLOCKSIZE SPA_MINBLOCKSIZE 346219089Spjd#define SPA_GBH_NBLKPTRS ((SPA_GANGBLOCKSIZE - \ 347219089Spjd sizeof (zio_eck_t)) / sizeof (blkptr_t)) 348219089Spjd#define SPA_GBH_FILLER ((SPA_GANGBLOCKSIZE - \ 349219089Spjd sizeof (zio_eck_t) - \ 350219089Spjd (SPA_GBH_NBLKPTRS * sizeof (blkptr_t))) /\ 351219089Spjd sizeof (uint64_t)) 352219089Spjd 353219089Spjdtypedef struct zio_gbh { 354219089Spjd blkptr_t zg_blkptr[SPA_GBH_NBLKPTRS]; 355219089Spjd uint64_t zg_filler[SPA_GBH_FILLER]; 356219089Spjd zio_eck_t zg_tail; 357219089Spjd} zio_gbh_phys_t; 358219089Spjd 359219089Spjd#define VDEV_RAIDZ_MAXPARITY 3 360219089Spjd 361209962Smm#define VDEV_PAD_SIZE (8 << 10) 362209962Smm/* 2 padding areas (vl_pad1 and vl_pad2) to skip */ 363209962Smm#define VDEV_SKIP_SIZE VDEV_PAD_SIZE * 2 364185029Spjd#define VDEV_PHYS_SIZE (112 << 10) 365185029Spjd#define VDEV_UBERBLOCK_RING (128 << 10) 366185029Spjd 367185029Spjd#define VDEV_UBERBLOCK_SHIFT(vd) \ 368219089Spjd MAX((vd)->v_top->v_ashift, UBERBLOCK_SHIFT) 369185029Spjd#define VDEV_UBERBLOCK_COUNT(vd) \ 370185029Spjd (VDEV_UBERBLOCK_RING >> VDEV_UBERBLOCK_SHIFT(vd)) 371185029Spjd#define VDEV_UBERBLOCK_OFFSET(vd, n) \ 372185029Spjd offsetof(vdev_label_t, vl_uberblock[(n) << VDEV_UBERBLOCK_SHIFT(vd)]) 373185029Spjd#define VDEV_UBERBLOCK_SIZE(vd) (1ULL << VDEV_UBERBLOCK_SHIFT(vd)) 374185029Spjd 375185029Spjdtypedef struct vdev_phys { 376219089Spjd char vp_nvlist[VDEV_PHYS_SIZE - sizeof (zio_eck_t)]; 377219089Spjd zio_eck_t vp_zbt; 378185029Spjd} vdev_phys_t; 379185029Spjd 380185029Spjdtypedef struct vdev_label { 381209962Smm char vl_pad1[VDEV_PAD_SIZE]; /* 8K */ 382209962Smm char vl_pad2[VDEV_PAD_SIZE]; /* 8K */ 383185029Spjd vdev_phys_t vl_vdev_phys; /* 112K */ 384185029Spjd char vl_uberblock[VDEV_UBERBLOCK_RING]; /* 128K */ 385185029Spjd} vdev_label_t; /* 256K total */ 386185029Spjd 387185029Spjd/* 388185029Spjd * vdev_dirty() flags 389185029Spjd */ 390185029Spjd#define VDD_METASLAB 0x01 391185029Spjd#define VDD_DTL 0x02 392185029Spjd 393185029Spjd/* 394185029Spjd * Size and offset of embedded boot loader region on each label. 395185029Spjd * The total size of the first two labels plus the boot area is 4MB. 396185029Spjd */ 397185029Spjd#define VDEV_BOOT_OFFSET (2 * sizeof (vdev_label_t)) 398185029Spjd#define VDEV_BOOT_SIZE (7ULL << 19) /* 3.5M */ 399185029Spjd 400185029Spjd/* 401185029Spjd * Size of label regions at the start and end of each leaf device. 402185029Spjd */ 403185029Spjd#define VDEV_LABEL_START_SIZE (2 * sizeof (vdev_label_t) + VDEV_BOOT_SIZE) 404185029Spjd#define VDEV_LABEL_END_SIZE (2 * sizeof (vdev_label_t)) 405185029Spjd#define VDEV_LABELS 4 406185029Spjd 407185029Spjdenum zio_checksum { 408185029Spjd ZIO_CHECKSUM_INHERIT = 0, 409185029Spjd ZIO_CHECKSUM_ON, 410185029Spjd ZIO_CHECKSUM_OFF, 411185029Spjd ZIO_CHECKSUM_LABEL, 412185029Spjd ZIO_CHECKSUM_GANG_HEADER, 413185029Spjd ZIO_CHECKSUM_ZILOG, 414185029Spjd ZIO_CHECKSUM_FLETCHER_2, 415185029Spjd ZIO_CHECKSUM_FLETCHER_4, 416185029Spjd ZIO_CHECKSUM_SHA256, 417219089Spjd ZIO_CHECKSUM_ZILOG2, 418185029Spjd ZIO_CHECKSUM_FUNCTIONS 419185029Spjd}; 420185029Spjd 421219089Spjd#define ZIO_CHECKSUM_ON_VALUE ZIO_CHECKSUM_FLETCHER_4 422185029Spjd#define ZIO_CHECKSUM_DEFAULT ZIO_CHECKSUM_ON 423185029Spjd 424185029Spjdenum zio_compress { 425185029Spjd ZIO_COMPRESS_INHERIT = 0, 426185029Spjd ZIO_COMPRESS_ON, 427185029Spjd ZIO_COMPRESS_OFF, 428185029Spjd ZIO_COMPRESS_LZJB, 429185029Spjd ZIO_COMPRESS_EMPTY, 430185029Spjd ZIO_COMPRESS_GZIP_1, 431185029Spjd ZIO_COMPRESS_GZIP_2, 432185029Spjd ZIO_COMPRESS_GZIP_3, 433185029Spjd ZIO_COMPRESS_GZIP_4, 434185029Spjd ZIO_COMPRESS_GZIP_5, 435185029Spjd ZIO_COMPRESS_GZIP_6, 436185029Spjd ZIO_COMPRESS_GZIP_7, 437185029Spjd ZIO_COMPRESS_GZIP_8, 438185029Spjd ZIO_COMPRESS_GZIP_9, 439219089Spjd ZIO_COMPRESS_ZLE, 440185029Spjd ZIO_COMPRESS_FUNCTIONS 441185029Spjd}; 442185029Spjd 443185029Spjd#define ZIO_COMPRESS_ON_VALUE ZIO_COMPRESS_LZJB 444185029Spjd#define ZIO_COMPRESS_DEFAULT ZIO_COMPRESS_OFF 445185029Spjd 446185029Spjd/* nvlist pack encoding */ 447185029Spjd#define NV_ENCODE_NATIVE 0 448185029Spjd#define NV_ENCODE_XDR 1 449185029Spjd 450185029Spjdtypedef enum { 451185029Spjd DATA_TYPE_UNKNOWN = 0, 452185029Spjd DATA_TYPE_BOOLEAN, 453185029Spjd DATA_TYPE_BYTE, 454185029Spjd DATA_TYPE_INT16, 455185029Spjd DATA_TYPE_UINT16, 456185029Spjd DATA_TYPE_INT32, 457185029Spjd DATA_TYPE_UINT32, 458185029Spjd DATA_TYPE_INT64, 459185029Spjd DATA_TYPE_UINT64, 460185029Spjd DATA_TYPE_STRING, 461185029Spjd DATA_TYPE_BYTE_ARRAY, 462185029Spjd DATA_TYPE_INT16_ARRAY, 463185029Spjd DATA_TYPE_UINT16_ARRAY, 464185029Spjd DATA_TYPE_INT32_ARRAY, 465185029Spjd DATA_TYPE_UINT32_ARRAY, 466185029Spjd DATA_TYPE_INT64_ARRAY, 467185029Spjd DATA_TYPE_UINT64_ARRAY, 468185029Spjd DATA_TYPE_STRING_ARRAY, 469185029Spjd DATA_TYPE_HRTIME, 470185029Spjd DATA_TYPE_NVLIST, 471185029Spjd DATA_TYPE_NVLIST_ARRAY, 472185029Spjd DATA_TYPE_BOOLEAN_VALUE, 473185029Spjd DATA_TYPE_INT8, 474185029Spjd DATA_TYPE_UINT8, 475185029Spjd DATA_TYPE_BOOLEAN_ARRAY, 476185029Spjd DATA_TYPE_INT8_ARRAY, 477185029Spjd DATA_TYPE_UINT8_ARRAY 478185029Spjd} data_type_t; 479185029Spjd 480185029Spjd/* 481185029Spjd * On-disk version number. 482185029Spjd */ 483185097Sdfr#define SPA_VERSION_1 1ULL 484185097Sdfr#define SPA_VERSION_2 2ULL 485185097Sdfr#define SPA_VERSION_3 3ULL 486185097Sdfr#define SPA_VERSION_4 4ULL 487185097Sdfr#define SPA_VERSION_5 5ULL 488185097Sdfr#define SPA_VERSION_6 6ULL 489185097Sdfr#define SPA_VERSION_7 7ULL 490185097Sdfr#define SPA_VERSION_8 8ULL 491185097Sdfr#define SPA_VERSION_9 9ULL 492185097Sdfr#define SPA_VERSION_10 10ULL 493185097Sdfr#define SPA_VERSION_11 11ULL 494185154Sdfr#define SPA_VERSION_12 12ULL 495185154Sdfr#define SPA_VERSION_13 13ULL 496201143Sdelphij#define SPA_VERSION_14 14ULL 497209962Smm#define SPA_VERSION_15 15ULL 498219089Spjd#define SPA_VERSION_16 16ULL 499219089Spjd#define SPA_VERSION_17 17ULL 500219089Spjd#define SPA_VERSION_18 18ULL 501219089Spjd#define SPA_VERSION_19 19ULL 502219089Spjd#define SPA_VERSION_20 20ULL 503219089Spjd#define SPA_VERSION_21 21ULL 504219089Spjd#define SPA_VERSION_22 22ULL 505219089Spjd#define SPA_VERSION_23 23ULL 506219089Spjd#define SPA_VERSION_24 24ULL 507219089Spjd#define SPA_VERSION_25 25ULL 508219089Spjd#define SPA_VERSION_26 26ULL 509219089Spjd#define SPA_VERSION_27 27ULL 510219089Spjd#define SPA_VERSION_28 28ULL 511219089Spjd 512185029Spjd/* 513219089Spjd * When bumping up SPA_VERSION, make sure GRUB ZFS understands the on-disk 514219089Spjd * format change. Go to usr/src/grub/grub-0.97/stage2/{zfs-include/, fsys_zfs*}, 515219089Spjd * and do the appropriate changes. Also bump the version number in 516219089Spjd * usr/src/grub/capability. 517185029Spjd */ 518219089Spjd#define SPA_VERSION SPA_VERSION_28 519219089Spjd#define SPA_VERSION_STRING "28" 520185029Spjd 521185029Spjd/* 522185097Sdfr * Symbolic names for the changes that caused a SPA_VERSION switch. 523185029Spjd * Used in the code when checking for presence or absence of a feature. 524185029Spjd * Feel free to define multiple symbolic names for each version if there 525185029Spjd * were multiple changes to on-disk structures during that version. 526185029Spjd * 527185097Sdfr * NOTE: When checking the current SPA_VERSION in your code, be sure 528185029Spjd * to use spa_version() since it reports the version of the 529185029Spjd * last synced uberblock. Checking the in-flight version can 530185029Spjd * be dangerous in some cases. 531185029Spjd */ 532185097Sdfr#define SPA_VERSION_INITIAL SPA_VERSION_1 533185097Sdfr#define SPA_VERSION_DITTO_BLOCKS SPA_VERSION_2 534185097Sdfr#define SPA_VERSION_SPARES SPA_VERSION_3 535185097Sdfr#define SPA_VERSION_RAID6 SPA_VERSION_3 536185097Sdfr#define SPA_VERSION_BPLIST_ACCOUNT SPA_VERSION_3 537185097Sdfr#define SPA_VERSION_RAIDZ_DEFLATE SPA_VERSION_3 538185097Sdfr#define SPA_VERSION_DNODE_BYTES SPA_VERSION_3 539185097Sdfr#define SPA_VERSION_ZPOOL_HISTORY SPA_VERSION_4 540185097Sdfr#define SPA_VERSION_GZIP_COMPRESSION SPA_VERSION_5 541185097Sdfr#define SPA_VERSION_BOOTFS SPA_VERSION_6 542185154Sdfr#define SPA_VERSION_SLOGS SPA_VERSION_7 543185154Sdfr#define SPA_VERSION_DELEGATED_PERMS SPA_VERSION_8 544185154Sdfr#define SPA_VERSION_FUID SPA_VERSION_9 545185154Sdfr#define SPA_VERSION_REFRESERVATION SPA_VERSION_9 546185154Sdfr#define SPA_VERSION_REFQUOTA SPA_VERSION_9 547185154Sdfr#define SPA_VERSION_UNIQUE_ACCURATE SPA_VERSION_9 548185154Sdfr#define SPA_VERSION_L2CACHE SPA_VERSION_10 549185154Sdfr#define SPA_VERSION_NEXT_CLONES SPA_VERSION_11 550185154Sdfr#define SPA_VERSION_ORIGIN SPA_VERSION_11 551185154Sdfr#define SPA_VERSION_DSL_SCRUB SPA_VERSION_11 552185154Sdfr#define SPA_VERSION_SNAP_PROPS SPA_VERSION_12 553185154Sdfr#define SPA_VERSION_USED_BREAKDOWN SPA_VERSION_13 554201143Sdelphij#define SPA_VERSION_PASSTHROUGH_X SPA_VERSION_14 555209962Smm#define SPA_VERSION_USERSPACE SPA_VERSION_15 556219089Spjd#define SPA_VERSION_STMF_PROP SPA_VERSION_16 557219089Spjd#define SPA_VERSION_RAIDZ3 SPA_VERSION_17 558219089Spjd#define SPA_VERSION_USERREFS SPA_VERSION_18 559219089Spjd#define SPA_VERSION_HOLES SPA_VERSION_19 560219089Spjd#define SPA_VERSION_ZLE_COMPRESSION SPA_VERSION_20 561219089Spjd#define SPA_VERSION_DEDUP SPA_VERSION_21 562219089Spjd#define SPA_VERSION_RECVD_PROPS SPA_VERSION_22 563219089Spjd#define SPA_VERSION_SLIM_ZIL SPA_VERSION_23 564219089Spjd#define SPA_VERSION_SA SPA_VERSION_24 565219089Spjd#define SPA_VERSION_SCAN SPA_VERSION_25 566219089Spjd#define SPA_VERSION_DIR_CLONES SPA_VERSION_26 567219089Spjd#define SPA_VERSION_DEADLISTS SPA_VERSION_26 568219089Spjd#define SPA_VERSION_FAST_SNAP SPA_VERSION_27 569219089Spjd#define SPA_VERSION_MULTI_REPLACE SPA_VERSION_28 570185029Spjd 571185029Spjd/* 572185029Spjd * The following are configuration names used in the nvlist describing a pool's 573185029Spjd * configuration. 574185029Spjd */ 575185029Spjd#define ZPOOL_CONFIG_VERSION "version" 576185029Spjd#define ZPOOL_CONFIG_POOL_NAME "name" 577185029Spjd#define ZPOOL_CONFIG_POOL_STATE "state" 578185029Spjd#define ZPOOL_CONFIG_POOL_TXG "txg" 579185029Spjd#define ZPOOL_CONFIG_POOL_GUID "pool_guid" 580185029Spjd#define ZPOOL_CONFIG_CREATE_TXG "create_txg" 581185029Spjd#define ZPOOL_CONFIG_TOP_GUID "top_guid" 582185029Spjd#define ZPOOL_CONFIG_VDEV_TREE "vdev_tree" 583185029Spjd#define ZPOOL_CONFIG_TYPE "type" 584185029Spjd#define ZPOOL_CONFIG_CHILDREN "children" 585185029Spjd#define ZPOOL_CONFIG_ID "id" 586185029Spjd#define ZPOOL_CONFIG_GUID "guid" 587185029Spjd#define ZPOOL_CONFIG_PATH "path" 588185029Spjd#define ZPOOL_CONFIG_DEVID "devid" 589185029Spjd#define ZPOOL_CONFIG_METASLAB_ARRAY "metaslab_array" 590185029Spjd#define ZPOOL_CONFIG_METASLAB_SHIFT "metaslab_shift" 591185029Spjd#define ZPOOL_CONFIG_ASHIFT "ashift" 592185029Spjd#define ZPOOL_CONFIG_ASIZE "asize" 593185029Spjd#define ZPOOL_CONFIG_DTL "DTL" 594185029Spjd#define ZPOOL_CONFIG_STATS "stats" 595185029Spjd#define ZPOOL_CONFIG_WHOLE_DISK "whole_disk" 596185029Spjd#define ZPOOL_CONFIG_ERRCOUNT "error_count" 597185029Spjd#define ZPOOL_CONFIG_NOT_PRESENT "not_present" 598185029Spjd#define ZPOOL_CONFIG_SPARES "spares" 599185029Spjd#define ZPOOL_CONFIG_IS_SPARE "is_spare" 600185029Spjd#define ZPOOL_CONFIG_NPARITY "nparity" 601185029Spjd#define ZPOOL_CONFIG_HOSTID "hostid" 602185029Spjd#define ZPOOL_CONFIG_HOSTNAME "hostname" 603212407Spjd#define ZPOOL_CONFIG_IS_LOG "is_log" 604185029Spjd#define ZPOOL_CONFIG_TIMESTAMP "timestamp" /* not stored on disk */ 605185029Spjd 606201689Sdelphij/* 607201689Sdelphij * The persistent vdev state is stored as separate values rather than a single 608201689Sdelphij * 'vdev_state' entry. This is because a device can be in multiple states, such 609201689Sdelphij * as offline and degraded. 610201689Sdelphij */ 611201689Sdelphij#define ZPOOL_CONFIG_OFFLINE "offline" 612201689Sdelphij#define ZPOOL_CONFIG_FAULTED "faulted" 613201689Sdelphij#define ZPOOL_CONFIG_DEGRADED "degraded" 614201689Sdelphij#define ZPOOL_CONFIG_REMOVED "removed" 615219089Spjd#define ZPOOL_CONFIG_FRU "fru" 616219089Spjd#define ZPOOL_CONFIG_AUX_STATE "aux_state" 617201689Sdelphij 618185029Spjd#define VDEV_TYPE_ROOT "root" 619185029Spjd#define VDEV_TYPE_MIRROR "mirror" 620185029Spjd#define VDEV_TYPE_REPLACING "replacing" 621185029Spjd#define VDEV_TYPE_RAIDZ "raidz" 622185029Spjd#define VDEV_TYPE_DISK "disk" 623185029Spjd#define VDEV_TYPE_FILE "file" 624185029Spjd#define VDEV_TYPE_MISSING "missing" 625219089Spjd#define VDEV_TYPE_HOLE "hole" 626185029Spjd#define VDEV_TYPE_SPARE "spare" 627219089Spjd#define VDEV_TYPE_LOG "log" 628219089Spjd#define VDEV_TYPE_L2CACHE "l2cache" 629185029Spjd 630185029Spjd/* 631185029Spjd * This is needed in userland to report the minimum necessary device size. 632185029Spjd */ 633185029Spjd#define SPA_MINDEVSIZE (64ULL << 20) 634185029Spjd 635185029Spjd/* 636185029Spjd * The location of the pool configuration repository, shared between kernel and 637185029Spjd * userland. 638185029Spjd */ 639219089Spjd#define ZPOOL_CACHE "/boot/zfs/zpool.cache" 640185029Spjd 641185029Spjd/* 642185029Spjd * vdev states are ordered from least to most healthy. 643185029Spjd * A vdev that's CANT_OPEN or below is considered unusable. 644185029Spjd */ 645185029Spjdtypedef enum vdev_state { 646185029Spjd VDEV_STATE_UNKNOWN = 0, /* Uninitialized vdev */ 647185029Spjd VDEV_STATE_CLOSED, /* Not currently open */ 648185029Spjd VDEV_STATE_OFFLINE, /* Not allowed to open */ 649201689Sdelphij VDEV_STATE_REMOVED, /* Explicitly removed from system */ 650185029Spjd VDEV_STATE_CANT_OPEN, /* Tried to open, but failed */ 651201689Sdelphij VDEV_STATE_FAULTED, /* External request to fault device */ 652185029Spjd VDEV_STATE_DEGRADED, /* Replicated vdev with unhealthy kids */ 653185029Spjd VDEV_STATE_HEALTHY /* Presumed good */ 654185029Spjd} vdev_state_t; 655185029Spjd 656185029Spjd/* 657185029Spjd * vdev aux states. When a vdev is in the CANT_OPEN state, the aux field 658185029Spjd * of the vdev stats structure uses these constants to distinguish why. 659185029Spjd */ 660185029Spjdtypedef enum vdev_aux { 661185029Spjd VDEV_AUX_NONE, /* no error */ 662185029Spjd VDEV_AUX_OPEN_FAILED, /* ldi_open_*() or vn_open() failed */ 663185029Spjd VDEV_AUX_CORRUPT_DATA, /* bad label or disk contents */ 664185029Spjd VDEV_AUX_NO_REPLICAS, /* insufficient number of replicas */ 665185029Spjd VDEV_AUX_BAD_GUID_SUM, /* vdev guid sum doesn't match */ 666185029Spjd VDEV_AUX_TOO_SMALL, /* vdev size is too small */ 667185029Spjd VDEV_AUX_BAD_LABEL, /* the label is OK but invalid */ 668185029Spjd VDEV_AUX_VERSION_NEWER, /* on-disk version is too new */ 669185029Spjd VDEV_AUX_VERSION_OLDER, /* on-disk version is too old */ 670185029Spjd VDEV_AUX_SPARED /* hot spare used in another pool */ 671185029Spjd} vdev_aux_t; 672185029Spjd 673185029Spjd/* 674185029Spjd * pool state. The following states are written to disk as part of the normal 675185029Spjd * SPA lifecycle: ACTIVE, EXPORTED, DESTROYED, SPARE. The remaining states are 676185029Spjd * software abstractions used at various levels to communicate pool state. 677185029Spjd */ 678185029Spjdtypedef enum pool_state { 679185029Spjd POOL_STATE_ACTIVE = 0, /* In active use */ 680185029Spjd POOL_STATE_EXPORTED, /* Explicitly exported */ 681185029Spjd POOL_STATE_DESTROYED, /* Explicitly destroyed */ 682185029Spjd POOL_STATE_SPARE, /* Reserved for hot spare use */ 683185029Spjd POOL_STATE_UNINITIALIZED, /* Internal spa_t state */ 684185029Spjd POOL_STATE_UNAVAIL, /* Internal libzfs state */ 685185029Spjd POOL_STATE_POTENTIALLY_ACTIVE /* Internal libzfs state */ 686185029Spjd} pool_state_t; 687185029Spjd 688185029Spjd/* 689185029Spjd * The uberblock version is incremented whenever an incompatible on-disk 690185029Spjd * format change is made to the SPA, DMU, or ZAP. 691185029Spjd * 692185029Spjd * Note: the first two fields should never be moved. When a storage pool 693185029Spjd * is opened, the uberblock must be read off the disk before the version 694185029Spjd * can be checked. If the ub_version field is moved, we may not detect 695185029Spjd * version mismatch. If the ub_magic field is moved, applications that 696185029Spjd * expect the magic number in the first word won't work. 697185029Spjd */ 698185029Spjd#define UBERBLOCK_MAGIC 0x00bab10c /* oo-ba-bloc! */ 699185029Spjd#define UBERBLOCK_SHIFT 10 /* up to 1K */ 700185029Spjd 701185029Spjdstruct uberblock { 702185029Spjd uint64_t ub_magic; /* UBERBLOCK_MAGIC */ 703185097Sdfr uint64_t ub_version; /* SPA_VERSION */ 704185029Spjd uint64_t ub_txg; /* txg of last sync */ 705185029Spjd uint64_t ub_guid_sum; /* sum of all vdev guids */ 706185029Spjd uint64_t ub_timestamp; /* UTC time of last sync */ 707185029Spjd blkptr_t ub_rootbp; /* MOS objset_phys_t */ 708185029Spjd}; 709185029Spjd 710185029Spjd/* 711185029Spjd * Flags. 712185029Spjd */ 713185029Spjd#define DNODE_MUST_BE_ALLOCATED 1 714185029Spjd#define DNODE_MUST_BE_FREE 2 715185029Spjd 716185029Spjd/* 717185029Spjd * Fixed constants. 718185029Spjd */ 719185029Spjd#define DNODE_SHIFT 9 /* 512 bytes */ 720185029Spjd#define DN_MIN_INDBLKSHIFT 10 /* 1k */ 721185029Spjd#define DN_MAX_INDBLKSHIFT 14 /* 16k */ 722185029Spjd#define DNODE_BLOCK_SHIFT 14 /* 16k */ 723185029Spjd#define DNODE_CORE_SIZE 64 /* 64 bytes for dnode sans blkptrs */ 724185029Spjd#define DN_MAX_OBJECT_SHIFT 48 /* 256 trillion (zfs_fid_t limit) */ 725185029Spjd#define DN_MAX_OFFSET_SHIFT 64 /* 2^64 bytes in a dnode */ 726185029Spjd 727185029Spjd/* 728185029Spjd * Derived constants. 729185029Spjd */ 730185029Spjd#define DNODE_SIZE (1 << DNODE_SHIFT) 731185029Spjd#define DN_MAX_NBLKPTR ((DNODE_SIZE - DNODE_CORE_SIZE) >> SPA_BLKPTRSHIFT) 732185029Spjd#define DN_MAX_BONUSLEN (DNODE_SIZE - DNODE_CORE_SIZE - (1 << SPA_BLKPTRSHIFT)) 733185029Spjd#define DN_MAX_OBJECT (1ULL << DN_MAX_OBJECT_SHIFT) 734185029Spjd 735185029Spjd#define DNODES_PER_BLOCK_SHIFT (DNODE_BLOCK_SHIFT - DNODE_SHIFT) 736185029Spjd#define DNODES_PER_BLOCK (1ULL << DNODES_PER_BLOCK_SHIFT) 737185029Spjd#define DNODES_PER_LEVEL_SHIFT (DN_MAX_INDBLKSHIFT - SPA_BLKPTRSHIFT) 738185029Spjd 739185029Spjd/* The +2 here is a cheesy way to round up */ 740185029Spjd#define DN_MAX_LEVELS (2 + ((DN_MAX_OFFSET_SHIFT - SPA_MINBLOCKSHIFT) / \ 741185029Spjd (DN_MIN_INDBLKSHIFT - SPA_BLKPTRSHIFT))) 742185029Spjd 743185029Spjd#define DN_BONUS(dnp) ((void*)((dnp)->dn_bonus + \ 744185029Spjd (((dnp)->dn_nblkptr - 1) * sizeof (blkptr_t)))) 745185029Spjd 746185029Spjd#define DN_USED_BYTES(dnp) (((dnp)->dn_flags & DNODE_FLAG_USED_BYTES) ? \ 747185029Spjd (dnp)->dn_used : (dnp)->dn_used << SPA_MINBLOCKSHIFT) 748185029Spjd 749185029Spjd#define EPB(blkshift, typeshift) (1 << (blkshift - typeshift)) 750185029Spjd 751185029Spjd/* Is dn_used in bytes? if not, it's in multiples of SPA_MINBLOCKSIZE */ 752219089Spjd#define DNODE_FLAG_USED_BYTES (1<<0) 753219089Spjd#define DNODE_FLAG_USERUSED_ACCOUNTED (1<<1) 754185029Spjd 755219089Spjd/* Does dnode have a SA spill blkptr in bonus? */ 756219089Spjd#define DNODE_FLAG_SPILL_BLKPTR (1<<2) 757219089Spjd 758185029Spjdtypedef struct dnode_phys { 759185029Spjd uint8_t dn_type; /* dmu_object_type_t */ 760185029Spjd uint8_t dn_indblkshift; /* ln2(indirect block size) */ 761185029Spjd uint8_t dn_nlevels; /* 1=dn_blkptr->data blocks */ 762185029Spjd uint8_t dn_nblkptr; /* length of dn_blkptr */ 763185029Spjd uint8_t dn_bonustype; /* type of data in bonus buffer */ 764185029Spjd uint8_t dn_checksum; /* ZIO_CHECKSUM type */ 765185029Spjd uint8_t dn_compress; /* ZIO_COMPRESS type */ 766185029Spjd uint8_t dn_flags; /* DNODE_FLAG_* */ 767185029Spjd uint16_t dn_datablkszsec; /* data block size in 512b sectors */ 768185029Spjd uint16_t dn_bonuslen; /* length of dn_bonus */ 769185029Spjd uint8_t dn_pad2[4]; 770185029Spjd 771185029Spjd /* accounting is protected by dn_dirty_mtx */ 772185029Spjd uint64_t dn_maxblkid; /* largest allocated block ID */ 773185029Spjd uint64_t dn_used; /* bytes (or sectors) of disk space */ 774185029Spjd 775185029Spjd uint64_t dn_pad3[4]; 776185029Spjd 777185029Spjd blkptr_t dn_blkptr[1]; 778219089Spjd uint8_t dn_bonus[DN_MAX_BONUSLEN - sizeof (blkptr_t)]; 779219089Spjd blkptr_t dn_spill; 780185029Spjd} dnode_phys_t; 781185029Spjd 782185029Spjdtypedef enum dmu_object_type { 783185029Spjd DMU_OT_NONE, 784185029Spjd /* general: */ 785185029Spjd DMU_OT_OBJECT_DIRECTORY, /* ZAP */ 786185029Spjd DMU_OT_OBJECT_ARRAY, /* UINT64 */ 787185029Spjd DMU_OT_PACKED_NVLIST, /* UINT8 (XDR by nvlist_pack/unpack) */ 788185029Spjd DMU_OT_PACKED_NVLIST_SIZE, /* UINT64 */ 789185029Spjd DMU_OT_BPLIST, /* UINT64 */ 790185029Spjd DMU_OT_BPLIST_HDR, /* UINT64 */ 791185029Spjd /* spa: */ 792185029Spjd DMU_OT_SPACE_MAP_HEADER, /* UINT64 */ 793185029Spjd DMU_OT_SPACE_MAP, /* UINT64 */ 794185029Spjd /* zil: */ 795185029Spjd DMU_OT_INTENT_LOG, /* UINT64 */ 796185029Spjd /* dmu: */ 797185029Spjd DMU_OT_DNODE, /* DNODE */ 798185029Spjd DMU_OT_OBJSET, /* OBJSET */ 799185029Spjd /* dsl: */ 800185029Spjd DMU_OT_DSL_DIR, /* UINT64 */ 801185029Spjd DMU_OT_DSL_DIR_CHILD_MAP, /* ZAP */ 802185029Spjd DMU_OT_DSL_DS_SNAP_MAP, /* ZAP */ 803185029Spjd DMU_OT_DSL_PROPS, /* ZAP */ 804185029Spjd DMU_OT_DSL_DATASET, /* UINT64 */ 805185029Spjd /* zpl: */ 806185029Spjd DMU_OT_ZNODE, /* ZNODE */ 807219089Spjd DMU_OT_OLDACL, /* Old ACL */ 808185029Spjd DMU_OT_PLAIN_FILE_CONTENTS, /* UINT8 */ 809185029Spjd DMU_OT_DIRECTORY_CONTENTS, /* ZAP */ 810185029Spjd DMU_OT_MASTER_NODE, /* ZAP */ 811185029Spjd DMU_OT_UNLINKED_SET, /* ZAP */ 812185029Spjd /* zvol: */ 813185029Spjd DMU_OT_ZVOL, /* UINT8 */ 814185029Spjd DMU_OT_ZVOL_PROP, /* ZAP */ 815185029Spjd /* other; for testing only! */ 816185029Spjd DMU_OT_PLAIN_OTHER, /* UINT8 */ 817185029Spjd DMU_OT_UINT64_OTHER, /* UINT64 */ 818185029Spjd DMU_OT_ZAP_OTHER, /* ZAP */ 819185029Spjd /* new object types: */ 820185029Spjd DMU_OT_ERROR_LOG, /* ZAP */ 821185029Spjd DMU_OT_SPA_HISTORY, /* UINT8 */ 822185029Spjd DMU_OT_SPA_HISTORY_OFFSETS, /* spa_his_phys_t */ 823185029Spjd DMU_OT_POOL_PROPS, /* ZAP */ 824219089Spjd DMU_OT_DSL_PERMS, /* ZAP */ 825219089Spjd DMU_OT_ACL, /* ACL */ 826219089Spjd DMU_OT_SYSACL, /* SYSACL */ 827219089Spjd DMU_OT_FUID, /* FUID table (Packed NVLIST UINT8) */ 828219089Spjd DMU_OT_FUID_SIZE, /* FUID table size UINT64 */ 829219089Spjd DMU_OT_NEXT_CLONES, /* ZAP */ 830219089Spjd DMU_OT_SCAN_QUEUE, /* ZAP */ 831219089Spjd DMU_OT_USERGROUP_USED, /* ZAP */ 832219089Spjd DMU_OT_USERGROUP_QUOTA, /* ZAP */ 833219089Spjd DMU_OT_USERREFS, /* ZAP */ 834219089Spjd DMU_OT_DDT_ZAP, /* ZAP */ 835219089Spjd DMU_OT_DDT_STATS, /* ZAP */ 836219089Spjd DMU_OT_SA, /* System attr */ 837219089Spjd DMU_OT_SA_MASTER_NODE, /* ZAP */ 838219089Spjd DMU_OT_SA_ATTR_REGISTRATION, /* ZAP */ 839219089Spjd DMU_OT_SA_ATTR_LAYOUTS, /* ZAP */ 840219089Spjd DMU_OT_SCAN_XLATE, /* ZAP */ 841219089Spjd DMU_OT_DEDUP, /* fake dedup BP from ddt_bp_create() */ 842185029Spjd DMU_OT_NUMTYPES 843185029Spjd} dmu_object_type_t; 844185029Spjd 845185029Spjdtypedef enum dmu_objset_type { 846185029Spjd DMU_OST_NONE, 847185029Spjd DMU_OST_META, 848185029Spjd DMU_OST_ZFS, 849185029Spjd DMU_OST_ZVOL, 850185029Spjd DMU_OST_OTHER, /* For testing only! */ 851185029Spjd DMU_OST_ANY, /* Be careful! */ 852185029Spjd DMU_OST_NUMTYPES 853185029Spjd} dmu_objset_type_t; 854185029Spjd 855185029Spjd/* 856219089Spjd * header for all bonus and spill buffers. 857219089Spjd * The header has a fixed portion with a variable number 858219089Spjd * of "lengths" depending on the number of variable sized 859219089Spjd * attribues which are determined by the "layout number" 860219089Spjd */ 861219089Spjd 862219089Spjd#define SA_MAGIC 0x2F505A /* ZFS SA */ 863219089Spjdtypedef struct sa_hdr_phys { 864219089Spjd uint32_t sa_magic; 865219089Spjd uint16_t sa_layout_info; /* Encoded with hdrsize and layout number */ 866219089Spjd uint16_t sa_lengths[1]; /* optional sizes for variable length attrs */ 867219089Spjd /* ... Data follows the lengths. */ 868219089Spjd} sa_hdr_phys_t; 869219089Spjd 870219089Spjd/* 871219089Spjd * sa_hdr_phys -> sa_layout_info 872219089Spjd * 873219089Spjd * 16 10 0 874219089Spjd * +--------+-------+ 875219089Spjd * | hdrsz |layout | 876219089Spjd * +--------+-------+ 877219089Spjd * 878219089Spjd * Bits 0-10 are the layout number 879219089Spjd * Bits 11-16 are the size of the header. 880219089Spjd * The hdrsize is the number * 8 881219089Spjd * 882219089Spjd * For example. 883219089Spjd * hdrsz of 1 ==> 8 byte header 884219089Spjd * 2 ==> 16 byte header 885219089Spjd * 886219089Spjd */ 887219089Spjd 888219089Spjd#define SA_HDR_LAYOUT_NUM(hdr) BF32_GET(hdr->sa_layout_info, 0, 10) 889219089Spjd#define SA_HDR_SIZE(hdr) BF32_GET_SB(hdr->sa_layout_info, 10, 16, 3, 0) 890219089Spjd#define SA_HDR_LAYOUT_INFO_ENCODE(x, num, size) \ 891219089Spjd{ \ 892219089Spjd BF32_SET_SB(x, 10, 6, 3, 0, size); \ 893219089Spjd BF32_SET(x, 0, 10, num); \ 894219089Spjd} 895219089Spjd 896219089Spjd#define SA_MODE_OFFSET 0 897219089Spjd#define SA_SIZE_OFFSET 8 898219089Spjd#define SA_GEN_OFFSET 16 899219089Spjd#define SA_UID_OFFSET 24 900219089Spjd#define SA_GID_OFFSET 32 901219089Spjd#define SA_PARENT_OFFSET 40 902219089Spjd 903219089Spjd/* 904185029Spjd * Intent log header - this on disk structure holds fields to manage 905185029Spjd * the log. All fields are 64 bit to easily handle cross architectures. 906185029Spjd */ 907185029Spjdtypedef struct zil_header { 908185029Spjd uint64_t zh_claim_txg; /* txg in which log blocks were claimed */ 909185029Spjd uint64_t zh_replay_seq; /* highest replayed sequence number */ 910185029Spjd blkptr_t zh_log; /* log chain */ 911185029Spjd uint64_t zh_claim_seq; /* highest claimed sequence number */ 912185029Spjd uint64_t zh_pad[5]; 913185029Spjd} zil_header_t; 914185029Spjd 915219089Spjd#define OBJSET_PHYS_SIZE 2048 916219089Spjd 917185029Spjdtypedef struct objset_phys { 918185029Spjd dnode_phys_t os_meta_dnode; 919185029Spjd zil_header_t os_zil_header; 920185029Spjd uint64_t os_type; 921209962Smm uint64_t os_flags; 922219089Spjd char os_pad[OBJSET_PHYS_SIZE - sizeof (dnode_phys_t)*3 - 923209962Smm sizeof (zil_header_t) - sizeof (uint64_t)*2]; 924209962Smm dnode_phys_t os_userused_dnode; 925209962Smm dnode_phys_t os_groupused_dnode; 926185029Spjd} objset_phys_t; 927185029Spjd 928185029Spjdtypedef struct dsl_dir_phys { 929185029Spjd uint64_t dd_creation_time; /* not actually used */ 930185029Spjd uint64_t dd_head_dataset_obj; 931185029Spjd uint64_t dd_parent_obj; 932185029Spjd uint64_t dd_clone_parent_obj; 933185029Spjd uint64_t dd_child_dir_zapobj; 934185029Spjd /* 935185029Spjd * how much space our children are accounting for; for leaf 936185029Spjd * datasets, == physical space used by fs + snaps 937185029Spjd */ 938185029Spjd uint64_t dd_used_bytes; 939185029Spjd uint64_t dd_compressed_bytes; 940185029Spjd uint64_t dd_uncompressed_bytes; 941185029Spjd /* Administrative quota setting */ 942185029Spjd uint64_t dd_quota; 943185029Spjd /* Administrative reservation setting */ 944185029Spjd uint64_t dd_reserved; 945185029Spjd uint64_t dd_props_zapobj; 946185029Spjd uint64_t dd_pad[21]; /* pad out to 256 bytes for good measure */ 947185029Spjd} dsl_dir_phys_t; 948185029Spjd 949185029Spjdtypedef struct dsl_dataset_phys { 950185029Spjd uint64_t ds_dir_obj; 951185029Spjd uint64_t ds_prev_snap_obj; 952185029Spjd uint64_t ds_prev_snap_txg; 953185029Spjd uint64_t ds_next_snap_obj; 954185029Spjd uint64_t ds_snapnames_zapobj; /* zap obj of snaps; ==0 for snaps */ 955185029Spjd uint64_t ds_num_children; /* clone/snap children; ==0 for head */ 956185029Spjd uint64_t ds_creation_time; /* seconds since 1970 */ 957185029Spjd uint64_t ds_creation_txg; 958185029Spjd uint64_t ds_deadlist_obj; 959185029Spjd uint64_t ds_used_bytes; 960185029Spjd uint64_t ds_compressed_bytes; 961185029Spjd uint64_t ds_uncompressed_bytes; 962185029Spjd uint64_t ds_unique_bytes; /* only relevant to snapshots */ 963185029Spjd /* 964185029Spjd * The ds_fsid_guid is a 56-bit ID that can change to avoid 965185029Spjd * collisions. The ds_guid is a 64-bit ID that will never 966185029Spjd * change, so there is a small probability that it will collide. 967185029Spjd */ 968185029Spjd uint64_t ds_fsid_guid; 969185029Spjd uint64_t ds_guid; 970185029Spjd uint64_t ds_flags; 971185029Spjd blkptr_t ds_bp; 972185029Spjd uint64_t ds_pad[8]; /* pad out to 320 bytes for good measure */ 973185029Spjd} dsl_dataset_phys_t; 974185029Spjd 975185029Spjd/* 976185029Spjd * The names of zap entries in the DIRECTORY_OBJECT of the MOS. 977185029Spjd */ 978185029Spjd#define DMU_POOL_DIRECTORY_OBJECT 1 979185029Spjd#define DMU_POOL_CONFIG "config" 980185029Spjd#define DMU_POOL_ROOT_DATASET "root_dataset" 981185029Spjd#define DMU_POOL_SYNC_BPLIST "sync_bplist" 982185029Spjd#define DMU_POOL_ERRLOG_SCRUB "errlog_scrub" 983185029Spjd#define DMU_POOL_ERRLOG_LAST "errlog_last" 984185029Spjd#define DMU_POOL_SPARES "spares" 985185029Spjd#define DMU_POOL_DEFLATE "deflate" 986185029Spjd#define DMU_POOL_HISTORY "history" 987185029Spjd#define DMU_POOL_PROPS "pool_props" 988185029Spjd 989185029Spjd#define ZAP_MAGIC 0x2F52AB2ABULL 990185029Spjd 991185029Spjd#define FZAP_BLOCK_SHIFT(zap) ((zap)->zap_block_shift) 992185029Spjd 993185029Spjd#define ZAP_MAXCD (uint32_t)(-1) 994185029Spjd#define ZAP_HASHBITS 28 995185029Spjd#define MZAP_ENT_LEN 64 996185029Spjd#define MZAP_NAME_LEN (MZAP_ENT_LEN - 8 - 4 - 2) 997185029Spjd#define MZAP_MAX_BLKSHIFT SPA_MAXBLOCKSHIFT 998185029Spjd#define MZAP_MAX_BLKSZ (1 << MZAP_MAX_BLKSHIFT) 999185029Spjd 1000185029Spjdtypedef struct mzap_ent_phys { 1001185029Spjd uint64_t mze_value; 1002185029Spjd uint32_t mze_cd; 1003185029Spjd uint16_t mze_pad; /* in case we want to chain them someday */ 1004185029Spjd char mze_name[MZAP_NAME_LEN]; 1005185029Spjd} mzap_ent_phys_t; 1006185029Spjd 1007185029Spjdtypedef struct mzap_phys { 1008185029Spjd uint64_t mz_block_type; /* ZBT_MICRO */ 1009185029Spjd uint64_t mz_salt; 1010185029Spjd uint64_t mz_pad[6]; 1011185029Spjd mzap_ent_phys_t mz_chunk[1]; 1012185029Spjd /* actually variable size depending on block size */ 1013185029Spjd} mzap_phys_t; 1014185029Spjd 1015185029Spjd/* 1016185029Spjd * The (fat) zap is stored in one object. It is an array of 1017185029Spjd * 1<<FZAP_BLOCK_SHIFT byte blocks. The layout looks like one of: 1018185029Spjd * 1019185029Spjd * ptrtbl fits in first block: 1020185029Spjd * [zap_phys_t zap_ptrtbl_shift < 6] [zap_leaf_t] ... 1021185029Spjd * 1022185029Spjd * ptrtbl too big for first block: 1023185029Spjd * [zap_phys_t zap_ptrtbl_shift >= 6] [zap_leaf_t] [ptrtbl] ... 1024185029Spjd * 1025185029Spjd */ 1026185029Spjd 1027185029Spjd#define ZBT_LEAF ((1ULL << 63) + 0) 1028185029Spjd#define ZBT_HEADER ((1ULL << 63) + 1) 1029185029Spjd#define ZBT_MICRO ((1ULL << 63) + 3) 1030185029Spjd/* any other values are ptrtbl blocks */ 1031185029Spjd 1032185029Spjd/* 1033185029Spjd * the embedded pointer table takes up half a block: 1034185029Spjd * block size / entry size (2^3) / 2 1035185029Spjd */ 1036185029Spjd#define ZAP_EMBEDDED_PTRTBL_SHIFT(zap) (FZAP_BLOCK_SHIFT(zap) - 3 - 1) 1037185029Spjd 1038185029Spjd/* 1039185029Spjd * The embedded pointer table starts half-way through the block. Since 1040185029Spjd * the pointer table itself is half the block, it starts at (64-bit) 1041185029Spjd * word number (1<<ZAP_EMBEDDED_PTRTBL_SHIFT(zap)). 1042185029Spjd */ 1043185029Spjd#define ZAP_EMBEDDED_PTRTBL_ENT(zap, idx) \ 1044185029Spjd ((uint64_t *)(zap)->zap_phys) \ 1045185029Spjd [(idx) + (1<<ZAP_EMBEDDED_PTRTBL_SHIFT(zap))] 1046185029Spjd 1047185029Spjd/* 1048185029Spjd * TAKE NOTE: 1049185029Spjd * If zap_phys_t is modified, zap_byteswap() must be modified. 1050185029Spjd */ 1051185029Spjdtypedef struct zap_phys { 1052185029Spjd uint64_t zap_block_type; /* ZBT_HEADER */ 1053185029Spjd uint64_t zap_magic; /* ZAP_MAGIC */ 1054185029Spjd 1055185029Spjd struct zap_table_phys { 1056185029Spjd uint64_t zt_blk; /* starting block number */ 1057185029Spjd uint64_t zt_numblks; /* number of blocks */ 1058185029Spjd uint64_t zt_shift; /* bits to index it */ 1059185029Spjd uint64_t zt_nextblk; /* next (larger) copy start block */ 1060185029Spjd uint64_t zt_blks_copied; /* number source blocks copied */ 1061185029Spjd } zap_ptrtbl; 1062185029Spjd 1063185029Spjd uint64_t zap_freeblk; /* the next free block */ 1064185029Spjd uint64_t zap_num_leafs; /* number of leafs */ 1065185029Spjd uint64_t zap_num_entries; /* number of entries */ 1066185029Spjd uint64_t zap_salt; /* salt to stir into hash function */ 1067185029Spjd /* 1068185029Spjd * This structure is followed by padding, and then the embedded 1069185029Spjd * pointer table. The embedded pointer table takes up second 1070185029Spjd * half of the block. It is accessed using the 1071185029Spjd * ZAP_EMBEDDED_PTRTBL_ENT() macro. 1072185029Spjd */ 1073185029Spjd} zap_phys_t; 1074185029Spjd 1075185029Spjdtypedef struct zap_table_phys zap_table_phys_t; 1076185029Spjd 1077185029Spjdtypedef struct fat_zap { 1078185029Spjd int zap_block_shift; /* block size shift */ 1079185029Spjd zap_phys_t *zap_phys; 1080185029Spjd} fat_zap_t; 1081185029Spjd 1082185029Spjd#define ZAP_LEAF_MAGIC 0x2AB1EAF 1083185029Spjd 1084185029Spjd/* chunk size = 24 bytes */ 1085185029Spjd#define ZAP_LEAF_CHUNKSIZE 24 1086185029Spjd 1087185029Spjd/* 1088185029Spjd * The amount of space available for chunks is: 1089185029Spjd * block size (1<<l->l_bs) - hash entry size (2) * number of hash 1090185029Spjd * entries - header space (2*chunksize) 1091185029Spjd */ 1092185029Spjd#define ZAP_LEAF_NUMCHUNKS(l) \ 1093185029Spjd (((1<<(l)->l_bs) - 2*ZAP_LEAF_HASH_NUMENTRIES(l)) / \ 1094185029Spjd ZAP_LEAF_CHUNKSIZE - 2) 1095185029Spjd 1096185029Spjd/* 1097185029Spjd * The amount of space within the chunk available for the array is: 1098185029Spjd * chunk size - space for type (1) - space for next pointer (2) 1099185029Spjd */ 1100185029Spjd#define ZAP_LEAF_ARRAY_BYTES (ZAP_LEAF_CHUNKSIZE - 3) 1101185029Spjd 1102185029Spjd#define ZAP_LEAF_ARRAY_NCHUNKS(bytes) \ 1103185029Spjd (((bytes)+ZAP_LEAF_ARRAY_BYTES-1)/ZAP_LEAF_ARRAY_BYTES) 1104185029Spjd 1105185029Spjd/* 1106185029Spjd * Low water mark: when there are only this many chunks free, start 1107185029Spjd * growing the ptrtbl. Ideally, this should be larger than a 1108185029Spjd * "reasonably-sized" entry. 20 chunks is more than enough for the 1109185029Spjd * largest directory entry (MAXNAMELEN (256) byte name, 8-byte value), 1110185029Spjd * while still being only around 3% for 16k blocks. 1111185029Spjd */ 1112185029Spjd#define ZAP_LEAF_LOW_WATER (20) 1113185029Spjd 1114185029Spjd/* 1115185029Spjd * The leaf hash table has block size / 2^5 (32) number of entries, 1116185029Spjd * which should be more than enough for the maximum number of entries, 1117185029Spjd * which is less than block size / CHUNKSIZE (24) / minimum number of 1118185029Spjd * chunks per entry (3). 1119185029Spjd */ 1120185029Spjd#define ZAP_LEAF_HASH_SHIFT(l) ((l)->l_bs - 5) 1121185029Spjd#define ZAP_LEAF_HASH_NUMENTRIES(l) (1 << ZAP_LEAF_HASH_SHIFT(l)) 1122185029Spjd 1123185029Spjd/* 1124185029Spjd * The chunks start immediately after the hash table. The end of the 1125185029Spjd * hash table is at l_hash + HASH_NUMENTRIES, which we simply cast to a 1126185029Spjd * chunk_t. 1127185029Spjd */ 1128185029Spjd#define ZAP_LEAF_CHUNK(l, idx) \ 1129185029Spjd ((zap_leaf_chunk_t *) \ 1130185029Spjd ((l)->l_phys->l_hash + ZAP_LEAF_HASH_NUMENTRIES(l)))[idx] 1131185029Spjd#define ZAP_LEAF_ENTRY(l, idx) (&ZAP_LEAF_CHUNK(l, idx).l_entry) 1132185029Spjd 1133185029Spjdtypedef enum zap_chunk_type { 1134185029Spjd ZAP_CHUNK_FREE = 253, 1135185029Spjd ZAP_CHUNK_ENTRY = 252, 1136185029Spjd ZAP_CHUNK_ARRAY = 251, 1137185029Spjd ZAP_CHUNK_TYPE_MAX = 250 1138185029Spjd} zap_chunk_type_t; 1139185029Spjd 1140185029Spjd/* 1141185029Spjd * TAKE NOTE: 1142185029Spjd * If zap_leaf_phys_t is modified, zap_leaf_byteswap() must be modified. 1143185029Spjd */ 1144185029Spjdtypedef struct zap_leaf_phys { 1145185029Spjd struct zap_leaf_header { 1146185029Spjd uint64_t lh_block_type; /* ZBT_LEAF */ 1147185029Spjd uint64_t lh_pad1; 1148185029Spjd uint64_t lh_prefix; /* hash prefix of this leaf */ 1149185029Spjd uint32_t lh_magic; /* ZAP_LEAF_MAGIC */ 1150185029Spjd uint16_t lh_nfree; /* number free chunks */ 1151185029Spjd uint16_t lh_nentries; /* number of entries */ 1152185029Spjd uint16_t lh_prefix_len; /* num bits used to id this */ 1153185029Spjd 1154185029Spjd/* above is accessable to zap, below is zap_leaf private */ 1155185029Spjd 1156185029Spjd uint16_t lh_freelist; /* chunk head of free list */ 1157185029Spjd uint8_t lh_pad2[12]; 1158185029Spjd } l_hdr; /* 2 24-byte chunks */ 1159185029Spjd 1160185029Spjd /* 1161185029Spjd * The header is followed by a hash table with 1162185029Spjd * ZAP_LEAF_HASH_NUMENTRIES(zap) entries. The hash table is 1163185029Spjd * followed by an array of ZAP_LEAF_NUMCHUNKS(zap) 1164185029Spjd * zap_leaf_chunk structures. These structures are accessed 1165185029Spjd * with the ZAP_LEAF_CHUNK() macro. 1166185029Spjd */ 1167185029Spjd 1168185029Spjd uint16_t l_hash[1]; 1169185029Spjd} zap_leaf_phys_t; 1170185029Spjd 1171185029Spjdtypedef union zap_leaf_chunk { 1172185029Spjd struct zap_leaf_entry { 1173185029Spjd uint8_t le_type; /* always ZAP_CHUNK_ENTRY */ 1174185029Spjd uint8_t le_int_size; /* size of ints */ 1175185029Spjd uint16_t le_next; /* next entry in hash chain */ 1176185029Spjd uint16_t le_name_chunk; /* first chunk of the name */ 1177185029Spjd uint16_t le_name_length; /* bytes in name, incl null */ 1178185029Spjd uint16_t le_value_chunk; /* first chunk of the value */ 1179185029Spjd uint16_t le_value_length; /* value length in ints */ 1180185029Spjd uint32_t le_cd; /* collision differentiator */ 1181185029Spjd uint64_t le_hash; /* hash value of the name */ 1182185029Spjd } l_entry; 1183185029Spjd struct zap_leaf_array { 1184185029Spjd uint8_t la_type; /* always ZAP_CHUNK_ARRAY */ 1185185029Spjd uint8_t la_array[ZAP_LEAF_ARRAY_BYTES]; 1186185029Spjd uint16_t la_next; /* next blk or CHAIN_END */ 1187185029Spjd } l_array; 1188185029Spjd struct zap_leaf_free { 1189185029Spjd uint8_t lf_type; /* always ZAP_CHUNK_FREE */ 1190185029Spjd uint8_t lf_pad[ZAP_LEAF_ARRAY_BYTES]; 1191185029Spjd uint16_t lf_next; /* next in free list, or CHAIN_END */ 1192185029Spjd } l_free; 1193185029Spjd} zap_leaf_chunk_t; 1194185029Spjd 1195185029Spjdtypedef struct zap_leaf { 1196185029Spjd int l_bs; /* block size shift */ 1197185029Spjd zap_leaf_phys_t *l_phys; 1198185029Spjd} zap_leaf_t; 1199185029Spjd 1200185029Spjd/* 1201185029Spjd * Define special zfs pflags 1202185029Spjd */ 1203185029Spjd#define ZFS_XATTR 0x1 /* is an extended attribute */ 1204185029Spjd#define ZFS_INHERIT_ACE 0x2 /* ace has inheritable ACEs */ 1205185029Spjd#define ZFS_ACL_TRIVIAL 0x4 /* files ACL is trivial */ 1206185029Spjd 1207185029Spjd#define MASTER_NODE_OBJ 1 1208185029Spjd 1209185029Spjd/* 1210185029Spjd * special attributes for master node. 1211185029Spjd */ 1212185029Spjd 1213185029Spjd#define ZFS_FSID "FSID" 1214185029Spjd#define ZFS_UNLINKED_SET "DELETE_QUEUE" 1215185029Spjd#define ZFS_ROOT_OBJ "ROOT" 1216185029Spjd#define ZPL_VERSION_OBJ "VERSION" 1217185029Spjd#define ZFS_PROP_BLOCKPERPAGE "BLOCKPERPAGE" 1218185029Spjd#define ZFS_PROP_NOGROWBLOCKS "NOGROWBLOCKS" 1219185029Spjd 1220185029Spjd#define ZFS_FLAG_BLOCKPERPAGE 0x1 1221185029Spjd#define ZFS_FLAG_NOGROWBLOCKS 0x2 1222185029Spjd 1223185029Spjd/* 1224185029Spjd * ZPL version - rev'd whenever an incompatible on-disk format change 1225185029Spjd * occurs. Independent of SPA/DMU/ZAP versioning. 1226185029Spjd */ 1227185029Spjd 1228185029Spjd#define ZPL_VERSION 1ULL 1229185029Spjd 1230185029Spjd/* 1231185029Spjd * The directory entry has the type (currently unused on Solaris) in the 1232185029Spjd * top 4 bits, and the object number in the low 48 bits. The "middle" 1233185029Spjd * 12 bits are unused. 1234185029Spjd */ 1235185029Spjd#define ZFS_DIRENT_TYPE(de) BF64_GET(de, 60, 4) 1236185029Spjd#define ZFS_DIRENT_OBJ(de) BF64_GET(de, 0, 48) 1237185029Spjd#define ZFS_DIRENT_MAKE(type, obj) (((uint64_t)type << 60) | obj) 1238185029Spjd 1239185029Spjdtypedef struct ace { 1240185029Spjd uid_t a_who; /* uid or gid */ 1241185029Spjd uint32_t a_access_mask; /* read,write,... */ 1242185029Spjd uint16_t a_flags; /* see below */ 1243185029Spjd uint16_t a_type; /* allow or deny */ 1244185029Spjd} ace_t; 1245185029Spjd 1246185029Spjd#define ACE_SLOT_CNT 6 1247185029Spjd 1248185029Spjdtypedef struct zfs_znode_acl { 1249185029Spjd uint64_t z_acl_extern_obj; /* ext acl pieces */ 1250185029Spjd uint32_t z_acl_count; /* Number of ACEs */ 1251185029Spjd uint16_t z_acl_version; /* acl version */ 1252185029Spjd uint16_t z_acl_pad; /* pad */ 1253185029Spjd ace_t z_ace_data[ACE_SLOT_CNT]; /* 6 standard ACEs */ 1254185029Spjd} zfs_znode_acl_t; 1255185029Spjd 1256185029Spjd/* 1257185029Spjd * This is the persistent portion of the znode. It is stored 1258185029Spjd * in the "bonus buffer" of the file. Short symbolic links 1259185029Spjd * are also stored in the bonus buffer. 1260185029Spjd */ 1261185029Spjdtypedef struct znode_phys { 1262185029Spjd uint64_t zp_atime[2]; /* 0 - last file access time */ 1263185029Spjd uint64_t zp_mtime[2]; /* 16 - last file modification time */ 1264185029Spjd uint64_t zp_ctime[2]; /* 32 - last file change time */ 1265185029Spjd uint64_t zp_crtime[2]; /* 48 - creation time */ 1266185029Spjd uint64_t zp_gen; /* 64 - generation (txg of creation) */ 1267185029Spjd uint64_t zp_mode; /* 72 - file mode bits */ 1268185029Spjd uint64_t zp_size; /* 80 - size of file */ 1269185029Spjd uint64_t zp_parent; /* 88 - directory parent (`..') */ 1270185029Spjd uint64_t zp_links; /* 96 - number of links to file */ 1271185029Spjd uint64_t zp_xattr; /* 104 - DMU object for xattrs */ 1272185029Spjd uint64_t zp_rdev; /* 112 - dev_t for VBLK & VCHR files */ 1273185029Spjd uint64_t zp_flags; /* 120 - persistent flags */ 1274185029Spjd uint64_t zp_uid; /* 128 - file owner */ 1275185029Spjd uint64_t zp_gid; /* 136 - owning group */ 1276185029Spjd uint64_t zp_pad[4]; /* 144 - future */ 1277185029Spjd zfs_znode_acl_t zp_acl; /* 176 - 263 ACL */ 1278185029Spjd /* 1279185029Spjd * Data may pad out any remaining bytes in the znode buffer, eg: 1280185029Spjd * 1281185029Spjd * |<---------------------- dnode_phys (512) ------------------------>| 1282185029Spjd * |<-- dnode (192) --->|<----------- "bonus" buffer (320) ---------->| 1283185029Spjd * |<---- znode (264) ---->|<---- data (56) ---->| 1284185029Spjd * 1285185029Spjd * At present, we only use this space to store symbolic links. 1286185029Spjd */ 1287185029Spjd} znode_phys_t; 1288185029Spjd 1289185029Spjd/* 1290185029Spjd * In-core vdev representation. 1291185029Spjd */ 1292185029Spjdstruct vdev; 1293192194Sdfrtypedef int vdev_phys_read_t(struct vdev *vdev, void *priv, 1294192194Sdfr off_t offset, void *buf, size_t bytes); 1295192194Sdfrtypedef int vdev_read_t(struct vdev *vdev, const blkptr_t *bp, 1296192194Sdfr void *buf, off_t offset, size_t bytes); 1297185029Spjd 1298185029Spjdtypedef STAILQ_HEAD(vdev_list, vdev) vdev_list_t; 1299185029Spjd 1300185029Spjdtypedef struct vdev { 1301185029Spjd STAILQ_ENTRY(vdev) v_childlink; /* link in parent's child list */ 1302185029Spjd STAILQ_ENTRY(vdev) v_alllink; /* link in global vdev list */ 1303185029Spjd vdev_list_t v_children; /* children of this vdev */ 1304219089Spjd const char *v_name; /* vdev name */ 1305185029Spjd uint64_t v_guid; /* vdev guid */ 1306185029Spjd int v_id; /* index in parent */ 1307192194Sdfr int v_ashift; /* offset to block shift */ 1308192194Sdfr int v_nparity; /* # parity for raidz */ 1309219089Spjd struct vdev *v_top; /* parent vdev */ 1310192194Sdfr int v_nchildren; /* # children */ 1311185029Spjd vdev_state_t v_state; /* current state */ 1312192194Sdfr vdev_phys_read_t *v_phys_read; /* read from raw leaf vdev */ 1313192194Sdfr vdev_read_t *v_read; /* read from vdev */ 1314185029Spjd void *v_read_priv; /* private data for read function */ 1315185029Spjd} vdev_t; 1316185029Spjd 1317185029Spjd/* 1318185029Spjd * In-core pool representation. 1319185029Spjd */ 1320185029Spjdtypedef STAILQ_HEAD(spa_list, spa) spa_list_t; 1321185029Spjd 1322185029Spjdtypedef struct spa { 1323185029Spjd STAILQ_ENTRY(spa) spa_link; /* link in global pool list */ 1324185029Spjd char *spa_name; /* pool name */ 1325185029Spjd uint64_t spa_guid; /* pool guid */ 1326185029Spjd uint64_t spa_txg; /* most recent transaction */ 1327185029Spjd struct uberblock spa_uberblock; /* best uberblock so far */ 1328185029Spjd vdev_list_t spa_vdevs; /* list of all toplevel vdevs */ 1329185029Spjd objset_phys_t spa_mos; /* MOS for this pool */ 1330235343Savg int spa_inited; /* initialized */ 1331185029Spjd} spa_t; 1332