spa.h revision 332547
1/* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21/* 22 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 23 * Copyright (c) 2011, 2018 by Delphix. All rights reserved. 24 * Copyright 2011 Nexenta Systems, Inc. All rights reserved. 25 * Copyright (c) 2014 Spectra Logic Corporation, All rights reserved. 26 * Copyright 2013 Saso Kiselkov. All rights reserved. 27 * Copyright (c) 2014 Integros [integros.com] 28 * Copyright 2017 Joyent, Inc. 29 * Copyright (c) 2017 Datto Inc. 30 */ 31 32#ifndef _SYS_SPA_H 33#define _SYS_SPA_H 34 35#include <sys/avl.h> 36#include <sys/zfs_context.h> 37#include <sys/nvpair.h> 38#include <sys/sysevent.h> 39#include <sys/sysmacros.h> 40#include <sys/types.h> 41#include <sys/fs/zfs.h> 42#include <sys/dmu.h> 43 44#ifdef __cplusplus 45extern "C" { 46#endif 47 48/* 49 * Forward references that lots of things need. 50 */ 51typedef struct spa spa_t; 52typedef struct vdev vdev_t; 53typedef struct metaslab metaslab_t; 54typedef struct metaslab_group metaslab_group_t; 55typedef struct metaslab_class metaslab_class_t; 56typedef struct zio zio_t; 57typedef struct zilog zilog_t; 58typedef struct spa_aux_vdev spa_aux_vdev_t; 59typedef struct ddt ddt_t; 60typedef struct ddt_entry ddt_entry_t; 61struct dsl_pool; 62struct dsl_dataset; 63 64/* 65 * General-purpose 32-bit and 64-bit bitfield encodings. 66 */ 67#define BF32_DECODE(x, low, len) P2PHASE((x) >> (low), 1U << (len)) 68#define BF64_DECODE(x, low, len) P2PHASE((x) >> (low), 1ULL << (len)) 69#define BF32_ENCODE(x, low, len) (P2PHASE((x), 1U << (len)) << (low)) 70#define BF64_ENCODE(x, low, len) (P2PHASE((x), 1ULL << (len)) << (low)) 71 72#define BF32_GET(x, low, len) BF32_DECODE(x, low, len) 73#define BF64_GET(x, low, len) BF64_DECODE(x, low, len) 74 75#define BF32_SET(x, low, len, val) do { \ 76 ASSERT3U(val, <, 1U << (len)); \ 77 ASSERT3U(low + len, <=, 32); \ 78 (x) ^= BF32_ENCODE((x >> low) ^ (val), low, len); \ 79_NOTE(CONSTCOND) } while (0) 80 81#define BF64_SET(x, low, len, val) do { \ 82 ASSERT3U(val, <, 1ULL << (len)); \ 83 ASSERT3U(low + len, <=, 64); \ 84 ((x) ^= BF64_ENCODE((x >> low) ^ (val), low, len)); \ 85_NOTE(CONSTCOND) } while (0) 86 87#define BF32_GET_SB(x, low, len, shift, bias) \ 88 ((BF32_GET(x, low, len) + (bias)) << (shift)) 89#define BF64_GET_SB(x, low, len, shift, bias) \ 90 ((BF64_GET(x, low, len) + (bias)) << (shift)) 91 92#define BF32_SET_SB(x, low, len, shift, bias, val) do { \ 93 ASSERT(IS_P2ALIGNED(val, 1U << shift)); \ 94 ASSERT3S((val) >> (shift), >=, bias); \ 95 BF32_SET(x, low, len, ((val) >> (shift)) - (bias)); \ 96_NOTE(CONSTCOND) } while (0) 97#define BF64_SET_SB(x, low, len, shift, bias, val) do { \ 98 ASSERT(IS_P2ALIGNED(val, 1ULL << shift)); \ 99 ASSERT3S((val) >> (shift), >=, bias); \ 100 BF64_SET(x, low, len, ((val) >> (shift)) - (bias)); \ 101_NOTE(CONSTCOND) } while (0) 102 103/* 104 * We currently support block sizes from 512 bytes to 16MB. 105 * The benefits of larger blocks, and thus larger IO, need to be weighed 106 * against the cost of COWing a giant block to modify one byte, and the 107 * large latency of reading or writing a large block. 108 * 109 * Note that although blocks up to 16MB are supported, the recordsize 110 * property can not be set larger than zfs_max_recordsize (default 1MB). 111 * See the comment near zfs_max_recordsize in dsl_dataset.c for details. 112 * 113 * Note that although the LSIZE field of the blkptr_t can store sizes up 114 * to 32MB, the dnode's dn_datablkszsec can only store sizes up to 115 * 32MB - 512 bytes. Therefore, we limit SPA_MAXBLOCKSIZE to 16MB. 116 */ 117#define SPA_MINBLOCKSHIFT 9 118#define SPA_OLD_MAXBLOCKSHIFT 17 119#define SPA_MAXBLOCKSHIFT 24 120#define SPA_MINBLOCKSIZE (1ULL << SPA_MINBLOCKSHIFT) 121#define SPA_OLD_MAXBLOCKSIZE (1ULL << SPA_OLD_MAXBLOCKSHIFT) 122#define SPA_MAXBLOCKSIZE (1ULL << SPA_MAXBLOCKSHIFT) 123 124/* 125 * Default maximum supported logical ashift. 126 * 127 * The current 8k allocation block size limit is due to the 8k 128 * aligned/sized operations performed by vdev_probe() on 129 * vdev_label->vl_pad2. Using another "safe region" for these tests 130 * would allow the limit to be raised to 16k, at the expense of 131 * only having 8 available uberblocks in the label area. 132 */ 133#define SPA_MAXASHIFT 13 134 135/* 136 * Default minimum supported logical ashift. 137 */ 138#define SPA_MINASHIFT SPA_MINBLOCKSHIFT 139 140/* 141 * Size of block to hold the configuration data (a packed nvlist) 142 */ 143#define SPA_CONFIG_BLOCKSIZE (1ULL << 14) 144 145/* 146 * The DVA size encodings for LSIZE and PSIZE support blocks up to 32MB. 147 * The ASIZE encoding should be at least 64 times larger (6 more bits) 148 * to support up to 4-way RAID-Z mirror mode with worst-case gang block 149 * overhead, three DVAs per bp, plus one more bit in case we do anything 150 * else that expands the ASIZE. 151 */ 152#define SPA_LSIZEBITS 16 /* LSIZE up to 32M (2^16 * 512) */ 153#define SPA_PSIZEBITS 16 /* PSIZE up to 32M (2^16 * 512) */ 154#define SPA_ASIZEBITS 24 /* ASIZE up to 64 times larger */ 155 156#define SPA_COMPRESSBITS 7 157 158/* 159 * All SPA data is represented by 128-bit data virtual addresses (DVAs). 160 * The members of the dva_t should be considered opaque outside the SPA. 161 */ 162typedef struct dva { 163 uint64_t dva_word[2]; 164} dva_t; 165 166/* 167 * Each block has a 256-bit checksum -- strong enough for cryptographic hashes. 168 */ 169typedef struct zio_cksum { 170 uint64_t zc_word[4]; 171} zio_cksum_t; 172 173/* 174 * Some checksums/hashes need a 256-bit initialization salt. This salt is kept 175 * secret and is suitable for use in MAC algorithms as the key. 176 */ 177typedef struct zio_cksum_salt { 178 uint8_t zcs_bytes[32]; 179} zio_cksum_salt_t; 180 181/* 182 * Each block is described by its DVAs, time of birth, checksum, etc. 183 * The word-by-word, bit-by-bit layout of the blkptr is as follows: 184 * 185 * 64 56 48 40 32 24 16 8 0 186 * +-------+-------+-------+-------+-------+-------+-------+-------+ 187 * 0 | vdev1 | GRID | ASIZE | 188 * +-------+-------+-------+-------+-------+-------+-------+-------+ 189 * 1 |G| offset1 | 190 * +-------+-------+-------+-------+-------+-------+-------+-------+ 191 * 2 | vdev2 | GRID | ASIZE | 192 * +-------+-------+-------+-------+-------+-------+-------+-------+ 193 * 3 |G| offset2 | 194 * +-------+-------+-------+-------+-------+-------+-------+-------+ 195 * 4 | vdev3 | GRID | ASIZE | 196 * +-------+-------+-------+-------+-------+-------+-------+-------+ 197 * 5 |G| offset3 | 198 * +-------+-------+-------+-------+-------+-------+-------+-------+ 199 * 6 |BDX|lvl| type | cksum |E| comp| PSIZE | LSIZE | 200 * +-------+-------+-------+-------+-------+-------+-------+-------+ 201 * 7 | padding | 202 * +-------+-------+-------+-------+-------+-------+-------+-------+ 203 * 8 | padding | 204 * +-------+-------+-------+-------+-------+-------+-------+-------+ 205 * 9 | physical birth txg | 206 * +-------+-------+-------+-------+-------+-------+-------+-------+ 207 * a | logical birth txg | 208 * +-------+-------+-------+-------+-------+-------+-------+-------+ 209 * b | fill count | 210 * +-------+-------+-------+-------+-------+-------+-------+-------+ 211 * c | checksum[0] | 212 * +-------+-------+-------+-------+-------+-------+-------+-------+ 213 * d | checksum[1] | 214 * +-------+-------+-------+-------+-------+-------+-------+-------+ 215 * e | checksum[2] | 216 * +-------+-------+-------+-------+-------+-------+-------+-------+ 217 * f | checksum[3] | 218 * +-------+-------+-------+-------+-------+-------+-------+-------+ 219 * 220 * Legend: 221 * 222 * vdev virtual device ID 223 * offset offset into virtual device 224 * LSIZE logical size 225 * PSIZE physical size (after compression) 226 * ASIZE allocated size (including RAID-Z parity and gang block headers) 227 * GRID RAID-Z layout information (reserved for future use) 228 * cksum checksum function 229 * comp compression function 230 * G gang block indicator 231 * B byteorder (endianness) 232 * D dedup 233 * X encryption (on version 30, which is not supported) 234 * E blkptr_t contains embedded data (see below) 235 * lvl level of indirection 236 * type DMU object type 237 * phys birth txg when dva[0] was written; zero if same as logical birth txg 238 * note that typically all the dva's would be written in this 239 * txg, but they could be different if they were moved by 240 * device removal. 241 * log. birth transaction group in which the block was logically born 242 * fill count number of non-zero blocks under this bp 243 * checksum[4] 256-bit checksum of the data this bp describes 244 */ 245 246/* 247 * "Embedded" blkptr_t's don't actually point to a block, instead they 248 * have a data payload embedded in the blkptr_t itself. See the comment 249 * in blkptr.c for more details. 250 * 251 * The blkptr_t is laid out as follows: 252 * 253 * 64 56 48 40 32 24 16 8 0 254 * +-------+-------+-------+-------+-------+-------+-------+-------+ 255 * 0 | payload | 256 * 1 | payload | 257 * 2 | payload | 258 * 3 | payload | 259 * 4 | payload | 260 * 5 | payload | 261 * +-------+-------+-------+-------+-------+-------+-------+-------+ 262 * 6 |BDX|lvl| type | etype |E| comp| PSIZE| LSIZE | 263 * +-------+-------+-------+-------+-------+-------+-------+-------+ 264 * 7 | payload | 265 * 8 | payload | 266 * 9 | payload | 267 * +-------+-------+-------+-------+-------+-------+-------+-------+ 268 * a | logical birth txg | 269 * +-------+-------+-------+-------+-------+-------+-------+-------+ 270 * b | payload | 271 * c | payload | 272 * d | payload | 273 * e | payload | 274 * f | payload | 275 * +-------+-------+-------+-------+-------+-------+-------+-------+ 276 * 277 * Legend: 278 * 279 * payload contains the embedded data 280 * B (byteorder) byteorder (endianness) 281 * D (dedup) padding (set to zero) 282 * X encryption (set to zero; see above) 283 * E (embedded) set to one 284 * lvl indirection level 285 * type DMU object type 286 * etype how to interpret embedded data (BP_EMBEDDED_TYPE_*) 287 * comp compression function of payload 288 * PSIZE size of payload after compression, in bytes 289 * LSIZE logical size of payload, in bytes 290 * note that 25 bits is enough to store the largest 291 * "normal" BP's LSIZE (2^16 * 2^9) in bytes 292 * log. birth transaction group in which the block was logically born 293 * 294 * Note that LSIZE and PSIZE are stored in bytes, whereas for non-embedded 295 * bp's they are stored in units of SPA_MINBLOCKSHIFT. 296 * Generally, the generic BP_GET_*() macros can be used on embedded BP's. 297 * The B, D, X, lvl, type, and comp fields are stored the same as with normal 298 * BP's so the BP_SET_* macros can be used with them. etype, PSIZE, LSIZE must 299 * be set with the BPE_SET_* macros. BP_SET_EMBEDDED() should be called before 300 * other macros, as they assert that they are only used on BP's of the correct 301 * "embedded-ness". 302 */ 303 304#define BPE_GET_ETYPE(bp) \ 305 (ASSERT(BP_IS_EMBEDDED(bp)), \ 306 BF64_GET((bp)->blk_prop, 40, 8)) 307#define BPE_SET_ETYPE(bp, t) do { \ 308 ASSERT(BP_IS_EMBEDDED(bp)); \ 309 BF64_SET((bp)->blk_prop, 40, 8, t); \ 310_NOTE(CONSTCOND) } while (0) 311 312#define BPE_GET_LSIZE(bp) \ 313 (ASSERT(BP_IS_EMBEDDED(bp)), \ 314 BF64_GET_SB((bp)->blk_prop, 0, 25, 0, 1)) 315#define BPE_SET_LSIZE(bp, x) do { \ 316 ASSERT(BP_IS_EMBEDDED(bp)); \ 317 BF64_SET_SB((bp)->blk_prop, 0, 25, 0, 1, x); \ 318_NOTE(CONSTCOND) } while (0) 319 320#define BPE_GET_PSIZE(bp) \ 321 (ASSERT(BP_IS_EMBEDDED(bp)), \ 322 BF64_GET_SB((bp)->blk_prop, 25, 7, 0, 1)) 323#define BPE_SET_PSIZE(bp, x) do { \ 324 ASSERT(BP_IS_EMBEDDED(bp)); \ 325 BF64_SET_SB((bp)->blk_prop, 25, 7, 0, 1, x); \ 326_NOTE(CONSTCOND) } while (0) 327 328typedef enum bp_embedded_type { 329 BP_EMBEDDED_TYPE_DATA, 330 BP_EMBEDDED_TYPE_RESERVED, /* Reserved for an unintegrated feature. */ 331 NUM_BP_EMBEDDED_TYPES = BP_EMBEDDED_TYPE_RESERVED 332} bp_embedded_type_t; 333 334#define BPE_NUM_WORDS 14 335#define BPE_PAYLOAD_SIZE (BPE_NUM_WORDS * sizeof (uint64_t)) 336#define BPE_IS_PAYLOADWORD(bp, wp) \ 337 ((wp) != &(bp)->blk_prop && (wp) != &(bp)->blk_birth) 338 339#define SPA_BLKPTRSHIFT 7 /* blkptr_t is 128 bytes */ 340#define SPA_DVAS_PER_BP 3 /* Number of DVAs in a bp */ 341#define SPA_SYNC_MIN_VDEVS 3 /* min vdevs to update during sync */ 342 343/* 344 * A block is a hole when it has either 1) never been written to, or 345 * 2) is zero-filled. In both cases, ZFS can return all zeroes for all reads 346 * without physically allocating disk space. Holes are represented in the 347 * blkptr_t structure by zeroed blk_dva. Correct checking for holes is 348 * done through the BP_IS_HOLE macro. For holes, the logical size, level, 349 * DMU object type, and birth times are all also stored for holes that 350 * were written to at some point (i.e. were punched after having been filled). 351 */ 352typedef struct blkptr { 353 dva_t blk_dva[SPA_DVAS_PER_BP]; /* Data Virtual Addresses */ 354 uint64_t blk_prop; /* size, compression, type, etc */ 355 uint64_t blk_pad[2]; /* Extra space for the future */ 356 uint64_t blk_phys_birth; /* txg when block was allocated */ 357 uint64_t blk_birth; /* transaction group at birth */ 358 uint64_t blk_fill; /* fill count */ 359 zio_cksum_t blk_cksum; /* 256-bit checksum */ 360} blkptr_t; 361 362/* 363 * Macros to get and set fields in a bp or DVA. 364 */ 365#define DVA_GET_ASIZE(dva) \ 366 BF64_GET_SB((dva)->dva_word[0], 0, SPA_ASIZEBITS, SPA_MINBLOCKSHIFT, 0) 367#define DVA_SET_ASIZE(dva, x) \ 368 BF64_SET_SB((dva)->dva_word[0], 0, SPA_ASIZEBITS, \ 369 SPA_MINBLOCKSHIFT, 0, x) 370 371#define DVA_GET_GRID(dva) BF64_GET((dva)->dva_word[0], 24, 8) 372#define DVA_SET_GRID(dva, x) BF64_SET((dva)->dva_word[0], 24, 8, x) 373 374#define DVA_GET_VDEV(dva) BF64_GET((dva)->dva_word[0], 32, 32) 375#define DVA_SET_VDEV(dva, x) BF64_SET((dva)->dva_word[0], 32, 32, x) 376 377#define DVA_GET_OFFSET(dva) \ 378 BF64_GET_SB((dva)->dva_word[1], 0, 63, SPA_MINBLOCKSHIFT, 0) 379#define DVA_SET_OFFSET(dva, x) \ 380 BF64_SET_SB((dva)->dva_word[1], 0, 63, SPA_MINBLOCKSHIFT, 0, x) 381 382#define DVA_GET_GANG(dva) BF64_GET((dva)->dva_word[1], 63, 1) 383#define DVA_SET_GANG(dva, x) BF64_SET((dva)->dva_word[1], 63, 1, x) 384 385#define BP_GET_LSIZE(bp) \ 386 (BP_IS_EMBEDDED(bp) ? \ 387 (BPE_GET_ETYPE(bp) == BP_EMBEDDED_TYPE_DATA ? BPE_GET_LSIZE(bp) : 0): \ 388 BF64_GET_SB((bp)->blk_prop, 0, SPA_LSIZEBITS, SPA_MINBLOCKSHIFT, 1)) 389#define BP_SET_LSIZE(bp, x) do { \ 390 ASSERT(!BP_IS_EMBEDDED(bp)); \ 391 BF64_SET_SB((bp)->blk_prop, \ 392 0, SPA_LSIZEBITS, SPA_MINBLOCKSHIFT, 1, x); \ 393_NOTE(CONSTCOND) } while (0) 394 395#define BP_GET_PSIZE(bp) \ 396 (BP_IS_EMBEDDED(bp) ? 0 : \ 397 BF64_GET_SB((bp)->blk_prop, 16, SPA_PSIZEBITS, SPA_MINBLOCKSHIFT, 1)) 398#define BP_SET_PSIZE(bp, x) do { \ 399 ASSERT(!BP_IS_EMBEDDED(bp)); \ 400 BF64_SET_SB((bp)->blk_prop, \ 401 16, SPA_PSIZEBITS, SPA_MINBLOCKSHIFT, 1, x); \ 402_NOTE(CONSTCOND) } while (0) 403 404#define BP_GET_COMPRESS(bp) \ 405 BF64_GET((bp)->blk_prop, 32, SPA_COMPRESSBITS) 406#define BP_SET_COMPRESS(bp, x) \ 407 BF64_SET((bp)->blk_prop, 32, SPA_COMPRESSBITS, x) 408 409#define BP_IS_EMBEDDED(bp) BF64_GET((bp)->blk_prop, 39, 1) 410#define BP_SET_EMBEDDED(bp, x) BF64_SET((bp)->blk_prop, 39, 1, x) 411 412#define BP_GET_CHECKSUM(bp) \ 413 (BP_IS_EMBEDDED(bp) ? ZIO_CHECKSUM_OFF : \ 414 BF64_GET((bp)->blk_prop, 40, 8)) 415#define BP_SET_CHECKSUM(bp, x) do { \ 416 ASSERT(!BP_IS_EMBEDDED(bp)); \ 417 BF64_SET((bp)->blk_prop, 40, 8, x); \ 418_NOTE(CONSTCOND) } while (0) 419 420#define BP_GET_TYPE(bp) BF64_GET((bp)->blk_prop, 48, 8) 421#define BP_SET_TYPE(bp, x) BF64_SET((bp)->blk_prop, 48, 8, x) 422 423#define BP_GET_LEVEL(bp) BF64_GET((bp)->blk_prop, 56, 5) 424#define BP_SET_LEVEL(bp, x) BF64_SET((bp)->blk_prop, 56, 5, x) 425 426#define BP_GET_DEDUP(bp) BF64_GET((bp)->blk_prop, 62, 1) 427#define BP_SET_DEDUP(bp, x) BF64_SET((bp)->blk_prop, 62, 1, x) 428 429#define BP_GET_BYTEORDER(bp) BF64_GET((bp)->blk_prop, 63, 1) 430#define BP_SET_BYTEORDER(bp, x) BF64_SET((bp)->blk_prop, 63, 1, x) 431 432#define BP_PHYSICAL_BIRTH(bp) \ 433 (BP_IS_EMBEDDED(bp) ? 0 : \ 434 (bp)->blk_phys_birth ? (bp)->blk_phys_birth : (bp)->blk_birth) 435 436#define BP_SET_BIRTH(bp, logical, physical) \ 437{ \ 438 ASSERT(!BP_IS_EMBEDDED(bp)); \ 439 (bp)->blk_birth = (logical); \ 440 (bp)->blk_phys_birth = ((logical) == (physical) ? 0 : (physical)); \ 441} 442 443#define BP_GET_FILL(bp) (BP_IS_EMBEDDED(bp) ? 1 : (bp)->blk_fill) 444 445#define BP_IS_METADATA(bp) \ 446 (BP_GET_LEVEL(bp) > 0 || DMU_OT_IS_METADATA(BP_GET_TYPE(bp))) 447 448#define BP_GET_ASIZE(bp) \ 449 (BP_IS_EMBEDDED(bp) ? 0 : \ 450 DVA_GET_ASIZE(&(bp)->blk_dva[0]) + \ 451 DVA_GET_ASIZE(&(bp)->blk_dva[1]) + \ 452 DVA_GET_ASIZE(&(bp)->blk_dva[2])) 453 454#define BP_GET_UCSIZE(bp) \ 455 (BP_IS_METADATA(bp) ? BP_GET_PSIZE(bp) : BP_GET_LSIZE(bp)) 456 457#define BP_GET_NDVAS(bp) \ 458 (BP_IS_EMBEDDED(bp) ? 0 : \ 459 !!DVA_GET_ASIZE(&(bp)->blk_dva[0]) + \ 460 !!DVA_GET_ASIZE(&(bp)->blk_dva[1]) + \ 461 !!DVA_GET_ASIZE(&(bp)->blk_dva[2])) 462 463#define BP_COUNT_GANG(bp) \ 464 (BP_IS_EMBEDDED(bp) ? 0 : \ 465 (DVA_GET_GANG(&(bp)->blk_dva[0]) + \ 466 DVA_GET_GANG(&(bp)->blk_dva[1]) + \ 467 DVA_GET_GANG(&(bp)->blk_dva[2]))) 468 469#define DVA_EQUAL(dva1, dva2) \ 470 ((dva1)->dva_word[1] == (dva2)->dva_word[1] && \ 471 (dva1)->dva_word[0] == (dva2)->dva_word[0]) 472 473#define BP_EQUAL(bp1, bp2) \ 474 (BP_PHYSICAL_BIRTH(bp1) == BP_PHYSICAL_BIRTH(bp2) && \ 475 (bp1)->blk_birth == (bp2)->blk_birth && \ 476 DVA_EQUAL(&(bp1)->blk_dva[0], &(bp2)->blk_dva[0]) && \ 477 DVA_EQUAL(&(bp1)->blk_dva[1], &(bp2)->blk_dva[1]) && \ 478 DVA_EQUAL(&(bp1)->blk_dva[2], &(bp2)->blk_dva[2])) 479 480#define ZIO_CHECKSUM_EQUAL(zc1, zc2) \ 481 (0 == (((zc1).zc_word[0] - (zc2).zc_word[0]) | \ 482 ((zc1).zc_word[1] - (zc2).zc_word[1]) | \ 483 ((zc1).zc_word[2] - (zc2).zc_word[2]) | \ 484 ((zc1).zc_word[3] - (zc2).zc_word[3]))) 485 486#define ZIO_CHECKSUM_IS_ZERO(zc) \ 487 (0 == ((zc)->zc_word[0] | (zc)->zc_word[1] | \ 488 (zc)->zc_word[2] | (zc)->zc_word[3])) 489 490#define ZIO_CHECKSUM_BSWAP(zcp) \ 491{ \ 492 (zcp)->zc_word[0] = BSWAP_64((zcp)->zc_word[0]); \ 493 (zcp)->zc_word[1] = BSWAP_64((zcp)->zc_word[1]); \ 494 (zcp)->zc_word[2] = BSWAP_64((zcp)->zc_word[2]); \ 495 (zcp)->zc_word[3] = BSWAP_64((zcp)->zc_word[3]); \ 496} 497 498 499#define DVA_IS_VALID(dva) (DVA_GET_ASIZE(dva) != 0) 500 501#define ZIO_SET_CHECKSUM(zcp, w0, w1, w2, w3) \ 502{ \ 503 (zcp)->zc_word[0] = w0; \ 504 (zcp)->zc_word[1] = w1; \ 505 (zcp)->zc_word[2] = w2; \ 506 (zcp)->zc_word[3] = w3; \ 507} 508 509#define BP_IDENTITY(bp) (ASSERT(!BP_IS_EMBEDDED(bp)), &(bp)->blk_dva[0]) 510#define BP_IS_GANG(bp) \ 511 (BP_IS_EMBEDDED(bp) ? B_FALSE : DVA_GET_GANG(BP_IDENTITY(bp))) 512#define DVA_IS_EMPTY(dva) ((dva)->dva_word[0] == 0ULL && \ 513 (dva)->dva_word[1] == 0ULL) 514#define BP_IS_HOLE(bp) \ 515 (!BP_IS_EMBEDDED(bp) && DVA_IS_EMPTY(BP_IDENTITY(bp))) 516 517/* BP_IS_RAIDZ(bp) assumes no block compression */ 518#define BP_IS_RAIDZ(bp) (DVA_GET_ASIZE(&(bp)->blk_dva[0]) > \ 519 BP_GET_PSIZE(bp)) 520 521#define BP_ZERO(bp) \ 522{ \ 523 (bp)->blk_dva[0].dva_word[0] = 0; \ 524 (bp)->blk_dva[0].dva_word[1] = 0; \ 525 (bp)->blk_dva[1].dva_word[0] = 0; \ 526 (bp)->blk_dva[1].dva_word[1] = 0; \ 527 (bp)->blk_dva[2].dva_word[0] = 0; \ 528 (bp)->blk_dva[2].dva_word[1] = 0; \ 529 (bp)->blk_prop = 0; \ 530 (bp)->blk_pad[0] = 0; \ 531 (bp)->blk_pad[1] = 0; \ 532 (bp)->blk_phys_birth = 0; \ 533 (bp)->blk_birth = 0; \ 534 (bp)->blk_fill = 0; \ 535 ZIO_SET_CHECKSUM(&(bp)->blk_cksum, 0, 0, 0, 0); \ 536} 537 538#if BYTE_ORDER == _BIG_ENDIAN 539#define ZFS_HOST_BYTEORDER (0ULL) 540#else 541#define ZFS_HOST_BYTEORDER (1ULL) 542#endif 543 544#define BP_SHOULD_BYTESWAP(bp) (BP_GET_BYTEORDER(bp) != ZFS_HOST_BYTEORDER) 545 546#define BP_SPRINTF_LEN 320 547 548/* 549 * This macro allows code sharing between zfs, libzpool, and mdb. 550 * 'func' is either snprintf() or mdb_snprintf(). 551 * 'ws' (whitespace) can be ' ' for single-line format, '\n' for multi-line. 552 */ 553#define SNPRINTF_BLKPTR(func, ws, buf, size, bp, type, checksum, compress) \ 554{ \ 555 static const char *copyname[] = \ 556 { "zero", "single", "double", "triple" }; \ 557 int len = 0; \ 558 int copies = 0; \ 559 \ 560 if (bp == NULL) { \ 561 len += func(buf + len, size - len, "<NULL>"); \ 562 } else if (BP_IS_HOLE(bp)) { \ 563 len += func(buf + len, size - len, \ 564 "HOLE [L%llu %s] " \ 565 "size=%llxL birth=%lluL", \ 566 (u_longlong_t)BP_GET_LEVEL(bp), \ 567 type, \ 568 (u_longlong_t)BP_GET_LSIZE(bp), \ 569 (u_longlong_t)bp->blk_birth); \ 570 } else if (BP_IS_EMBEDDED(bp)) { \ 571 len = func(buf + len, size - len, \ 572 "EMBEDDED [L%llu %s] et=%u %s " \ 573 "size=%llxL/%llxP birth=%lluL", \ 574 (u_longlong_t)BP_GET_LEVEL(bp), \ 575 type, \ 576 (int)BPE_GET_ETYPE(bp), \ 577 compress, \ 578 (u_longlong_t)BPE_GET_LSIZE(bp), \ 579 (u_longlong_t)BPE_GET_PSIZE(bp), \ 580 (u_longlong_t)bp->blk_birth); \ 581 } else { \ 582 for (int d = 0; d < BP_GET_NDVAS(bp); d++) { \ 583 const dva_t *dva = &bp->blk_dva[d]; \ 584 if (DVA_IS_VALID(dva)) \ 585 copies++; \ 586 len += func(buf + len, size - len, \ 587 "DVA[%d]=<%llu:%llx:%llx>%c", d, \ 588 (u_longlong_t)DVA_GET_VDEV(dva), \ 589 (u_longlong_t)DVA_GET_OFFSET(dva), \ 590 (u_longlong_t)DVA_GET_ASIZE(dva), \ 591 ws); \ 592 } \ 593 if (BP_IS_GANG(bp) && \ 594 DVA_GET_ASIZE(&bp->blk_dva[2]) <= \ 595 DVA_GET_ASIZE(&bp->blk_dva[1]) / 2) \ 596 copies--; \ 597 len += func(buf + len, size - len, \ 598 "[L%llu %s] %s %s %s %s %s %s%c" \ 599 "size=%llxL/%llxP birth=%lluL/%lluP fill=%llu%c" \ 600 "cksum=%llx:%llx:%llx:%llx", \ 601 (u_longlong_t)BP_GET_LEVEL(bp), \ 602 type, \ 603 checksum, \ 604 compress, \ 605 BP_GET_BYTEORDER(bp) == 0 ? "BE" : "LE", \ 606 BP_IS_GANG(bp) ? "gang" : "contiguous", \ 607 BP_GET_DEDUP(bp) ? "dedup" : "unique", \ 608 copyname[copies], \ 609 ws, \ 610 (u_longlong_t)BP_GET_LSIZE(bp), \ 611 (u_longlong_t)BP_GET_PSIZE(bp), \ 612 (u_longlong_t)bp->blk_birth, \ 613 (u_longlong_t)BP_PHYSICAL_BIRTH(bp), \ 614 (u_longlong_t)BP_GET_FILL(bp), \ 615 ws, \ 616 (u_longlong_t)bp->blk_cksum.zc_word[0], \ 617 (u_longlong_t)bp->blk_cksum.zc_word[1], \ 618 (u_longlong_t)bp->blk_cksum.zc_word[2], \ 619 (u_longlong_t)bp->blk_cksum.zc_word[3]); \ 620 } \ 621 ASSERT(len < size); \ 622} 623 624#define BP_GET_BUFC_TYPE(bp) \ 625 (BP_IS_METADATA(bp) ? ARC_BUFC_METADATA : ARC_BUFC_DATA) 626 627typedef enum spa_import_type { 628 SPA_IMPORT_EXISTING, 629 SPA_IMPORT_ASSEMBLE 630} spa_import_type_t; 631 632/* state manipulation functions */ 633extern int spa_open(const char *pool, spa_t **, void *tag); 634extern int spa_open_rewind(const char *pool, spa_t **, void *tag, 635 nvlist_t *policy, nvlist_t **config); 636extern int spa_get_stats(const char *pool, nvlist_t **config, char *altroot, 637 size_t buflen); 638extern int spa_create(const char *pool, nvlist_t *config, nvlist_t *props, 639 nvlist_t *zplprops); 640#ifdef illumos 641extern int spa_import_rootpool(char *devpath, char *devid); 642#else 643extern int spa_import_rootpool(const char *name); 644#endif 645extern int spa_import(const char *pool, nvlist_t *config, nvlist_t *props, 646 uint64_t flags); 647extern nvlist_t *spa_tryimport(nvlist_t *tryconfig); 648extern int spa_destroy(char *pool); 649extern int spa_checkpoint(const char *pool); 650extern int spa_checkpoint_discard(const char *pool); 651extern int spa_export(char *pool, nvlist_t **oldconfig, boolean_t force, 652 boolean_t hardforce); 653extern int spa_reset(char *pool); 654extern void spa_async_request(spa_t *spa, int flag); 655extern void spa_async_unrequest(spa_t *spa, int flag); 656extern void spa_async_suspend(spa_t *spa); 657extern void spa_async_resume(spa_t *spa); 658extern spa_t *spa_inject_addref(char *pool); 659extern void spa_inject_delref(spa_t *spa); 660extern void spa_scan_stat_init(spa_t *spa); 661extern int spa_scan_get_stats(spa_t *spa, pool_scan_stat_t *ps); 662 663#define SPA_ASYNC_CONFIG_UPDATE 0x01 664#define SPA_ASYNC_REMOVE 0x02 665#define SPA_ASYNC_PROBE 0x04 666#define SPA_ASYNC_RESILVER_DONE 0x08 667#define SPA_ASYNC_RESILVER 0x10 668#define SPA_ASYNC_AUTOEXPAND 0x20 669#define SPA_ASYNC_REMOVE_DONE 0x40 670#define SPA_ASYNC_REMOVE_STOP 0x80 671 672/* 673 * Controls the behavior of spa_vdev_remove(). 674 */ 675#define SPA_REMOVE_UNSPARE 0x01 676#define SPA_REMOVE_DONE 0x02 677 678/* device manipulation */ 679extern int spa_vdev_add(spa_t *spa, nvlist_t *nvroot); 680extern int spa_vdev_attach(spa_t *spa, uint64_t guid, nvlist_t *nvroot, 681 int replacing); 682extern int spa_vdev_detach(spa_t *spa, uint64_t guid, uint64_t pguid, 683 int replace_done); 684extern int spa_vdev_remove(spa_t *spa, uint64_t guid, boolean_t unspare); 685extern boolean_t spa_vdev_remove_active(spa_t *spa); 686extern int spa_vdev_setpath(spa_t *spa, uint64_t guid, const char *newpath); 687extern int spa_vdev_setfru(spa_t *spa, uint64_t guid, const char *newfru); 688extern int spa_vdev_split_mirror(spa_t *spa, char *newname, nvlist_t *config, 689 nvlist_t *props, boolean_t exp); 690 691/* spare state (which is global across all pools) */ 692extern void spa_spare_add(vdev_t *vd); 693extern void spa_spare_remove(vdev_t *vd); 694extern boolean_t spa_spare_exists(uint64_t guid, uint64_t *pool, int *refcnt); 695extern void spa_spare_activate(vdev_t *vd); 696 697/* L2ARC state (which is global across all pools) */ 698extern void spa_l2cache_add(vdev_t *vd); 699extern void spa_l2cache_remove(vdev_t *vd); 700extern boolean_t spa_l2cache_exists(uint64_t guid, uint64_t *pool); 701extern void spa_l2cache_activate(vdev_t *vd); 702extern void spa_l2cache_drop(spa_t *spa); 703 704/* scanning */ 705extern int spa_scan(spa_t *spa, pool_scan_func_t func); 706extern int spa_scan_stop(spa_t *spa); 707extern int spa_scrub_pause_resume(spa_t *spa, pool_scrub_cmd_t flag); 708 709/* spa syncing */ 710extern void spa_sync(spa_t *spa, uint64_t txg); /* only for DMU use */ 711extern void spa_sync_allpools(void); 712 713/* spa namespace global mutex */ 714extern kmutex_t spa_namespace_lock; 715 716/* 717 * SPA configuration functions in spa_config.c 718 */ 719 720#define SPA_CONFIG_UPDATE_POOL 0 721#define SPA_CONFIG_UPDATE_VDEVS 1 722 723extern void spa_write_cachefile(spa_t *, boolean_t, boolean_t); 724extern void spa_config_load(void); 725extern nvlist_t *spa_all_configs(uint64_t *); 726extern void spa_config_set(spa_t *spa, nvlist_t *config); 727extern nvlist_t *spa_config_generate(spa_t *spa, vdev_t *vd, uint64_t txg, 728 int getstats); 729extern void spa_config_update(spa_t *spa, int what); 730 731/* 732 * Miscellaneous SPA routines in spa_misc.c 733 */ 734 735/* Namespace manipulation */ 736extern spa_t *spa_lookup(const char *name); 737extern spa_t *spa_add(const char *name, nvlist_t *config, const char *altroot); 738extern void spa_remove(spa_t *spa); 739extern spa_t *spa_next(spa_t *prev); 740 741/* Refcount functions */ 742extern void spa_open_ref(spa_t *spa, void *tag); 743extern void spa_close(spa_t *spa, void *tag); 744extern void spa_async_close(spa_t *spa, void *tag); 745extern boolean_t spa_refcount_zero(spa_t *spa); 746 747#define SCL_NONE 0x00 748#define SCL_CONFIG 0x01 749#define SCL_STATE 0x02 750#define SCL_L2ARC 0x04 /* hack until L2ARC 2.0 */ 751#define SCL_ALLOC 0x08 752#define SCL_ZIO 0x10 753#define SCL_FREE 0x20 754#define SCL_VDEV 0x40 755#define SCL_LOCKS 7 756#define SCL_ALL ((1 << SCL_LOCKS) - 1) 757#define SCL_STATE_ALL (SCL_STATE | SCL_L2ARC | SCL_ZIO) 758 759/* Pool configuration locks */ 760extern int spa_config_tryenter(spa_t *spa, int locks, void *tag, krw_t rw); 761extern void spa_config_enter(spa_t *spa, int locks, void *tag, krw_t rw); 762extern void spa_config_exit(spa_t *spa, int locks, void *tag); 763extern int spa_config_held(spa_t *spa, int locks, krw_t rw); 764 765/* Pool vdev add/remove lock */ 766extern uint64_t spa_vdev_enter(spa_t *spa); 767extern uint64_t spa_vdev_config_enter(spa_t *spa); 768extern void spa_vdev_config_exit(spa_t *spa, vdev_t *vd, uint64_t txg, 769 int error, char *tag); 770extern int spa_vdev_exit(spa_t *spa, vdev_t *vd, uint64_t txg, int error); 771 772/* Pool vdev state change lock */ 773extern void spa_vdev_state_enter(spa_t *spa, int oplock); 774extern int spa_vdev_state_exit(spa_t *spa, vdev_t *vd, int error); 775 776/* Log state */ 777typedef enum spa_log_state { 778 SPA_LOG_UNKNOWN = 0, /* unknown log state */ 779 SPA_LOG_MISSING, /* missing log(s) */ 780 SPA_LOG_CLEAR, /* clear the log(s) */ 781 SPA_LOG_GOOD, /* log(s) are good */ 782} spa_log_state_t; 783 784extern spa_log_state_t spa_get_log_state(spa_t *spa); 785extern void spa_set_log_state(spa_t *spa, spa_log_state_t state); 786extern int spa_reset_logs(spa_t *spa); 787 788/* Log claim callback */ 789extern void spa_claim_notify(zio_t *zio); 790 791/* Accessor functions */ 792extern boolean_t spa_shutting_down(spa_t *spa); 793extern struct dsl_pool *spa_get_dsl(spa_t *spa); 794extern boolean_t spa_is_initializing(spa_t *spa); 795extern boolean_t spa_indirect_vdevs_loaded(spa_t *spa); 796extern blkptr_t *spa_get_rootblkptr(spa_t *spa); 797extern void spa_set_rootblkptr(spa_t *spa, const blkptr_t *bp); 798extern void spa_altroot(spa_t *, char *, size_t); 799extern int spa_sync_pass(spa_t *spa); 800extern char *spa_name(spa_t *spa); 801extern uint64_t spa_guid(spa_t *spa); 802extern uint64_t spa_load_guid(spa_t *spa); 803extern uint64_t spa_last_synced_txg(spa_t *spa); 804extern uint64_t spa_first_txg(spa_t *spa); 805extern uint64_t spa_syncing_txg(spa_t *spa); 806extern uint64_t spa_final_dirty_txg(spa_t *spa); 807extern uint64_t spa_version(spa_t *spa); 808extern pool_state_t spa_state(spa_t *spa); 809extern spa_load_state_t spa_load_state(spa_t *spa); 810extern uint64_t spa_freeze_txg(spa_t *spa); 811extern uint64_t spa_get_worst_case_asize(spa_t *spa, uint64_t lsize); 812extern uint64_t spa_get_dspace(spa_t *spa); 813extern uint64_t spa_get_checkpoint_space(spa_t *spa); 814extern uint64_t spa_get_slop_space(spa_t *spa); 815extern void spa_update_dspace(spa_t *spa); 816extern uint64_t spa_version(spa_t *spa); 817extern boolean_t spa_deflate(spa_t *spa); 818extern metaslab_class_t *spa_normal_class(spa_t *spa); 819extern metaslab_class_t *spa_log_class(spa_t *spa); 820extern void spa_evicting_os_register(spa_t *, objset_t *os); 821extern void spa_evicting_os_deregister(spa_t *, objset_t *os); 822extern void spa_evicting_os_wait(spa_t *spa); 823extern int spa_max_replication(spa_t *spa); 824extern int spa_prev_software_version(spa_t *spa); 825extern int spa_busy(void); 826extern uint8_t spa_get_failmode(spa_t *spa); 827extern boolean_t spa_suspended(spa_t *spa); 828extern uint64_t spa_bootfs(spa_t *spa); 829extern uint64_t spa_delegation(spa_t *spa); 830extern objset_t *spa_meta_objset(spa_t *spa); 831extern uint64_t spa_deadman_synctime(spa_t *spa); 832 833/* Miscellaneous support routines */ 834extern void spa_load_failed(spa_t *spa, const char *fmt, ...); 835extern void spa_load_note(spa_t *spa, const char *fmt, ...); 836extern void spa_activate_mos_feature(spa_t *spa, const char *feature, 837 dmu_tx_t *tx); 838extern void spa_deactivate_mos_feature(spa_t *spa, const char *feature); 839extern int spa_rename(const char *oldname, const char *newname); 840extern spa_t *spa_by_guid(uint64_t pool_guid, uint64_t device_guid); 841extern boolean_t spa_guid_exists(uint64_t pool_guid, uint64_t device_guid); 842extern char *spa_strdup(const char *); 843extern void spa_strfree(char *); 844extern uint64_t spa_get_random(uint64_t range); 845extern uint64_t spa_generate_guid(spa_t *spa); 846extern void snprintf_blkptr(char *buf, size_t buflen, const blkptr_t *bp); 847extern void spa_freeze(spa_t *spa); 848extern int spa_change_guid(spa_t *spa); 849extern void spa_upgrade(spa_t *spa, uint64_t version); 850extern void spa_evict_all(void); 851extern vdev_t *spa_lookup_by_guid(spa_t *spa, uint64_t guid, 852 boolean_t l2cache); 853extern boolean_t spa_has_spare(spa_t *, uint64_t guid); 854extern uint64_t dva_get_dsize_sync(spa_t *spa, const dva_t *dva); 855extern uint64_t bp_get_dsize_sync(spa_t *spa, const blkptr_t *bp); 856extern uint64_t bp_get_dsize(spa_t *spa, const blkptr_t *bp); 857extern boolean_t spa_has_slogs(spa_t *spa); 858extern boolean_t spa_is_root(spa_t *spa); 859extern boolean_t spa_writeable(spa_t *spa); 860extern boolean_t spa_has_pending_synctask(spa_t *spa); 861extern int spa_maxblocksize(spa_t *spa); 862extern boolean_t spa_has_checkpoint(spa_t *spa); 863extern boolean_t spa_importing_readonly_checkpoint(spa_t *spa); 864extern boolean_t spa_suspend_async_destroy(spa_t *spa); 865extern uint64_t spa_min_claim_txg(spa_t *spa); 866extern void zfs_blkptr_verify(spa_t *spa, const blkptr_t *bp); 867extern boolean_t zfs_dva_valid(spa_t *spa, const dva_t *dva, 868 const blkptr_t *bp); 869typedef void (*spa_remap_cb_t)(uint64_t vdev, uint64_t offset, uint64_t size, 870 void *arg); 871extern boolean_t spa_remap_blkptr(spa_t *spa, blkptr_t *bp, 872 spa_remap_cb_t callback, void *arg); 873extern uint64_t spa_get_last_removal_txg(spa_t *spa); 874extern boolean_t spa_trust_config(spa_t *spa); 875extern uint64_t spa_missing_tvds_allowed(spa_t *spa); 876extern void spa_set_missing_tvds(spa_t *spa, uint64_t missing); 877extern boolean_t spa_top_vdevs_spacemap_addressable(spa_t *spa); 878 879extern int spa_mode(spa_t *spa); 880extern uint64_t zfs_strtonum(const char *str, char **nptr); 881 882extern char *spa_his_ievent_table[]; 883 884extern void spa_history_create_obj(spa_t *spa, dmu_tx_t *tx); 885extern int spa_history_get(spa_t *spa, uint64_t *offset, uint64_t *len_read, 886 char *his_buf); 887extern int spa_history_log(spa_t *spa, const char *his_buf); 888extern int spa_history_log_nvl(spa_t *spa, nvlist_t *nvl); 889extern void spa_history_log_version(spa_t *spa, const char *operation); 890extern void spa_history_log_internal(spa_t *spa, const char *operation, 891 dmu_tx_t *tx, const char *fmt, ...); 892extern void spa_history_log_internal_ds(struct dsl_dataset *ds, const char *op, 893 dmu_tx_t *tx, const char *fmt, ...); 894extern void spa_history_log_internal_dd(dsl_dir_t *dd, const char *operation, 895 dmu_tx_t *tx, const char *fmt, ...); 896 897/* error handling */ 898struct zbookmark_phys; 899extern void spa_log_error(spa_t *spa, zio_t *zio); 900extern void zfs_ereport_post(const char *cls, spa_t *spa, vdev_t *vd, 901 zio_t *zio, uint64_t stateoroffset, uint64_t length); 902extern void zfs_post_remove(spa_t *spa, vdev_t *vd); 903extern void zfs_post_state_change(spa_t *spa, vdev_t *vd); 904extern void zfs_post_autoreplace(spa_t *spa, vdev_t *vd); 905extern uint64_t spa_get_errlog_size(spa_t *spa); 906extern int spa_get_errlog(spa_t *spa, void *uaddr, size_t *count); 907extern void spa_errlog_rotate(spa_t *spa); 908extern void spa_errlog_drain(spa_t *spa); 909extern void spa_errlog_sync(spa_t *spa, uint64_t txg); 910extern void spa_get_errlists(spa_t *spa, avl_tree_t *last, avl_tree_t *scrub); 911 912/* vdev cache */ 913extern void vdev_cache_stat_init(void); 914extern void vdev_cache_stat_fini(void); 915 916/* Initialization and termination */ 917extern void spa_init(int flags); 918extern void spa_fini(void); 919extern void spa_boot_init(void); 920 921/* properties */ 922extern int spa_prop_set(spa_t *spa, nvlist_t *nvp); 923extern int spa_prop_get(spa_t *spa, nvlist_t **nvp); 924extern void spa_prop_clear_bootfs(spa_t *spa, uint64_t obj, dmu_tx_t *tx); 925extern void spa_configfile_set(spa_t *, nvlist_t *, boolean_t); 926 927/* asynchronous event notification */ 928extern void spa_event_notify(spa_t *spa, vdev_t *vdev, nvlist_t *hist_nvl, 929 const char *name); 930extern sysevent_t *spa_event_create(spa_t *spa, vdev_t *vd, nvlist_t *hist_nvl, 931 const char *name); 932extern void spa_event_post(sysevent_t *ev); 933extern void spa_event_discard(sysevent_t *ev); 934 935#ifdef ZFS_DEBUG 936#define dprintf_bp(bp, fmt, ...) do { \ 937 if (zfs_flags & ZFS_DEBUG_DPRINTF) { \ 938 char *__blkbuf = kmem_alloc(BP_SPRINTF_LEN, KM_SLEEP); \ 939 snprintf_blkptr(__blkbuf, BP_SPRINTF_LEN, (bp)); \ 940 dprintf(fmt " %s\n", __VA_ARGS__, __blkbuf); \ 941 kmem_free(__blkbuf, BP_SPRINTF_LEN); \ 942 } \ 943_NOTE(CONSTCOND) } while (0) 944#else 945#define dprintf_bp(bp, fmt, ...) 946#endif 947 948extern boolean_t spa_debug_enabled(spa_t *spa); 949#define spa_dbgmsg(spa, ...) \ 950{ \ 951 if (spa_debug_enabled(spa)) \ 952 zfs_dbgmsg(__VA_ARGS__); \ 953} 954 955extern int spa_mode_global; /* mode, e.g. FREAD | FWRITE */ 956 957#ifdef __cplusplus 958} 959#endif 960 961#endif /* _SYS_SPA_H */ 962