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 * Copyright (c) 2017, Intel Corporation. 31 */ 32 33 #ifndef _SYS_SPA_H 34 #define _SYS_SPA_H 35 36 #include <sys/avl.h> 37 #include <sys/zfs_context.h> 38 #include <sys/nvpair.h> 39 #include <sys/sysevent.h> 40 #include <sys/sysmacros.h> 41 #include <sys/types.h> 42 #include <sys/fs/zfs.h> 43 #include <sys/dmu.h> 44 45 #ifdef __cplusplus 46 extern "C" { 47 #endif 48 49 /* 50 * Forward references that lots of things need. 51 */ 52 typedef struct spa spa_t; 53 typedef struct vdev vdev_t; 54 typedef struct metaslab metaslab_t; 55 typedef struct metaslab_group metaslab_group_t; 56 typedef struct metaslab_class metaslab_class_t; 57 typedef struct zio zio_t; 58 typedef struct zilog zilog_t; 59 typedef struct spa_aux_vdev spa_aux_vdev_t; 60 typedef struct ddt ddt_t; 61 typedef struct ddt_entry ddt_entry_t; 62 struct dsl_pool; 63 struct dsl_dataset; 64 65 /* 66 * General-purpose 32-bit and 64-bit bitfield encodings. 67 */ 68 #define BF32_DECODE(x, low, len) P2PHASE((x) >> (low), 1U << (len)) 69 #define BF64_DECODE(x, low, len) P2PHASE((x) >> (low), 1ULL << (len)) 70 #define BF32_ENCODE(x, low, len) (P2PHASE((x), 1U << (len)) << (low)) 71 #define BF64_ENCODE(x, low, len) (P2PHASE((x), 1ULL << (len)) << (low)) 72 73 #define BF32_GET(x, low, len) BF32_DECODE(x, low, len) 74 #define BF64_GET(x, low, len) BF64_DECODE(x, low, len) 75 76 #define BF32_SET(x, low, len, val) do { \ 77 ASSERT3U(val, <, 1U << (len)); \ 78 ASSERT3U(low + len, <=, 32); \ 79 (x) ^= BF32_ENCODE((x >> low) ^ (val), low, len); \ 80 _NOTE(CONSTCOND) } while (0) 81 82 #define BF64_SET(x, low, len, val) do { \ 83 ASSERT3U(val, <, 1ULL << (len)); \ 84 ASSERT3U(low + len, <=, 64); \ 85 ((x) ^= BF64_ENCODE((x >> low) ^ (val), low, len)); \ 86 _NOTE(CONSTCOND) } while (0) 87 88 #define BF32_GET_SB(x, low, len, shift, bias) \ 89 ((BF32_GET(x, low, len) + (bias)) << (shift)) 90 #define BF64_GET_SB(x, low, len, shift, bias) \ 91 ((BF64_GET(x, low, len) + (bias)) << (shift)) 92 93 #define BF32_SET_SB(x, low, len, shift, bias, val) do { \ 94 ASSERT(IS_P2ALIGNED(val, 1U << shift)); \ 95 ASSERT3S((val) >> (shift), >=, bias); \ 96 BF32_SET(x, low, len, ((val) >> (shift)) - (bias)); \ 97 _NOTE(CONSTCOND) } while (0) 98 #define BF64_SET_SB(x, low, len, shift, bias, val) do { \ 99 ASSERT(IS_P2ALIGNED(val, 1ULL << shift)); \ 100 ASSERT3S((val) >> (shift), >=, bias); \ 101 BF64_SET(x, low, len, ((val) >> (shift)) - (bias)); \ 102 _NOTE(CONSTCOND) } while (0) 103 104 /* 105 * We currently support block sizes from 512 bytes to 16MB. 106 * The benefits of larger blocks, and thus larger IO, need to be weighed 107 * against the cost of COWing a giant block to modify one byte, and the 108 * large latency of reading or writing a large block. 109 * 110 * Note that although blocks up to 16MB are supported, the recordsize 111 * property can not be set larger than zfs_max_recordsize (default 1MB). 112 * See the comment near zfs_max_recordsize in dsl_dataset.c for details. 113 * 114 * Note that although the LSIZE field of the blkptr_t can store sizes up 115 * to 32MB, the dnode's dn_datablkszsec can only store sizes up to 116 * 32MB - 512 bytes. Therefore, we limit SPA_MAXBLOCKSIZE to 16MB. 117 */ 118 #define SPA_MINBLOCKSHIFT 9 119 #define SPA_OLD_MAXBLOCKSHIFT 17 120 #define SPA_MAXBLOCKSHIFT 24 121 #define SPA_MINBLOCKSIZE (1ULL << SPA_MINBLOCKSHIFT) 122 #define SPA_OLD_MAXBLOCKSIZE (1ULL << SPA_OLD_MAXBLOCKSHIFT) 123 #define SPA_MAXBLOCKSIZE (1ULL << SPA_MAXBLOCKSHIFT) 124 125 /* 126 * Default maximum supported logical ashift. 127 * 128 * The current 8k allocation block size limit is due to the 8k 129 * aligned/sized operations performed by vdev_probe() on 130 * vdev_label->vl_pad2. Using another "safe region" for these tests 131 * would allow the limit to be raised to 16k, at the expense of 132 * only having 8 available uberblocks in the label area. 133 */ 134 #define SPA_MAXASHIFT 13 135 136 /* 137 * Default minimum supported logical ashift. 138 */ 139 #define SPA_MINASHIFT SPA_MINBLOCKSHIFT 140 141 /* 142 * Size of block to hold the configuration data (a packed nvlist) 143 */ 144 #define SPA_CONFIG_BLOCKSIZE (1ULL << 14) 145 146 /* 147 * The DVA size encodings for LSIZE and PSIZE support blocks up to 32MB. 148 * The ASIZE encoding should be at least 64 times larger (6 more bits) 149 * to support up to 4-way RAID-Z mirror mode with worst-case gang block 150 * overhead, three DVAs per bp, plus one more bit in case we do anything 151 * else that expands the ASIZE. 152 */ 153 #define SPA_LSIZEBITS 16 /* LSIZE up to 32M (2^16 * 512) */ 154 #define SPA_PSIZEBITS 16 /* PSIZE up to 32M (2^16 * 512) */ 155 #define SPA_ASIZEBITS 24 /* ASIZE up to 64 times larger */ 156 157 #define SPA_COMPRESSBITS 7 158 #define SPA_VDEVBITS 24 159 160 /* 161 * All SPA data is represented by 128-bit data virtual addresses (DVAs). 162 * The members of the dva_t should be considered opaque outside the SPA. 163 */ 164 typedef struct dva { 165 uint64_t dva_word[2]; 166 } dva_t; 167 168 /* 169 * Each block has a 256-bit checksum -- strong enough for cryptographic hashes. 170 */ 171 typedef struct zio_cksum { 172 uint64_t zc_word[4]; 173 } zio_cksum_t; 174 175 /* 176 * Some checksums/hashes need a 256-bit initialization salt. This salt is kept 177 * secret and is suitable for use in MAC algorithms as the key. 178 */ 179 typedef struct zio_cksum_salt { 180 uint8_t zcs_bytes[32]; 181 } zio_cksum_salt_t; 182 183 /* 184 * Each block is described by its DVAs, time of birth, checksum, etc. 185 * The word-by-word, bit-by-bit layout of the blkptr is as follows: 186 * 187 * 64 56 48 40 32 24 16 8 0 188 * +-------+-------+-------+-------+-------+-------+-------+-------+ 189 * 0 | pad | vdev1 | GRID | ASIZE | 190 * +-------+-------+-------+-------+-------+-------+-------+-------+ 191 * 1 |G| offset1 | 192 * +-------+-------+-------+-------+-------+-------+-------+-------+ 193 * 2 | pad | vdev2 | GRID | ASIZE | 194 * +-------+-------+-------+-------+-------+-------+-------+-------+ 195 * 3 |G| offset2 | 196 * +-------+-------+-------+-------+-------+-------+-------+-------+ 197 * 4 | pad | vdev3 | GRID | ASIZE | 198 * +-------+-------+-------+-------+-------+-------+-------+-------+ 199 * 5 |G| offset3 | 200 * +-------+-------+-------+-------+-------+-------+-------+-------+ 201 * 6 |BDX|lvl| type | cksum |E| comp| PSIZE | LSIZE | 202 * +-------+-------+-------+-------+-------+-------+-------+-------+ 203 * 7 | padding | 204 * +-------+-------+-------+-------+-------+-------+-------+-------+ 205 * 8 | padding | 206 * +-------+-------+-------+-------+-------+-------+-------+-------+ 207 * 9 | physical birth txg | 208 * +-------+-------+-------+-------+-------+-------+-------+-------+ 209 * a | logical birth txg | 210 * +-------+-------+-------+-------+-------+-------+-------+-------+ 211 * b | fill count | 212 * +-------+-------+-------+-------+-------+-------+-------+-------+ 213 * c | checksum[0] | 214 * +-------+-------+-------+-------+-------+-------+-------+-------+ 215 * d | checksum[1] | 216 * +-------+-------+-------+-------+-------+-------+-------+-------+ 217 * e | checksum[2] | 218 * +-------+-------+-------+-------+-------+-------+-------+-------+ 219 * f | checksum[3] | 220 * +-------+-------+-------+-------+-------+-------+-------+-------+ 221 * 222 * Legend: 223 * 224 * vdev virtual device ID 225 * offset offset into virtual device 226 * LSIZE logical size 227 * PSIZE physical size (after compression) 228 * ASIZE allocated size (including RAID-Z parity and gang block headers) 229 * GRID RAID-Z layout information (reserved for future use) 230 * cksum checksum function 231 * comp compression function 232 * G gang block indicator 233 * B byteorder (endianness) 234 * D dedup 235 * X encryption (on version 30, which is not supported) 236 * E blkptr_t contains embedded data (see below) 237 * lvl level of indirection 238 * type DMU object type 239 * phys birth txg when dva[0] was written; zero if same as logical birth txg 240 * note that typically all the dva's would be written in this 241 * txg, but they could be different if they were moved by 242 * device removal. 243 * log. birth transaction group in which the block was logically born 244 * fill count number of non-zero blocks under this bp 245 * checksum[4] 256-bit checksum of the data this bp describes 246 */ 247 248 /* 249 * "Embedded" blkptr_t's don't actually point to a block, instead they 250 * have a data payload embedded in the blkptr_t itself. See the comment 251 * in blkptr.c for more details. 252 * 253 * The blkptr_t is laid out as follows: 254 * 255 * 64 56 48 40 32 24 16 8 0 256 * +-------+-------+-------+-------+-------+-------+-------+-------+ 257 * 0 | payload | 258 * 1 | payload | 259 * 2 | payload | 260 * 3 | payload | 261 * 4 | payload | 262 * 5 | payload | 263 * +-------+-------+-------+-------+-------+-------+-------+-------+ 264 * 6 |BDX|lvl| type | etype |E| comp| PSIZE| LSIZE | 265 * +-------+-------+-------+-------+-------+-------+-------+-------+ 266 * 7 | payload | 267 * 8 | payload | 268 * 9 | payload | 269 * +-------+-------+-------+-------+-------+-------+-------+-------+ 270 * a | logical birth txg | 271 * +-------+-------+-------+-------+-------+-------+-------+-------+ 272 * b | payload | 273 * c | payload | 274 * d | payload | 275 * e | payload | 276 * f | payload | 277 * +-------+-------+-------+-------+-------+-------+-------+-------+ 278 * 279 * Legend: 280 * 281 * payload contains the embedded data 282 * B (byteorder) byteorder (endianness) 283 * D (dedup) padding (set to zero) 284 * X encryption (set to zero; see above) 285 * E (embedded) set to one 286 * lvl indirection level 287 * type DMU object type 288 * etype how to interpret embedded data (BP_EMBEDDED_TYPE_*) 289 * comp compression function of payload 290 * PSIZE size of payload after compression, in bytes 291 * LSIZE logical size of payload, in bytes 292 * note that 25 bits is enough to store the largest 293 * "normal" BP's LSIZE (2^16 * 2^9) in bytes 294 * log. birth transaction group in which the block was logically born 295 * 296 * Note that LSIZE and PSIZE are stored in bytes, whereas for non-embedded 297 * bp's they are stored in units of SPA_MINBLOCKSHIFT. 298 * Generally, the generic BP_GET_*() macros can be used on embedded BP's. 299 * The B, D, X, lvl, type, and comp fields are stored the same as with normal 300 * BP's so the BP_SET_* macros can be used with them. etype, PSIZE, LSIZE must 301 * be set with the BPE_SET_* macros. BP_SET_EMBEDDED() should be called before 302 * other macros, as they assert that they are only used on BP's of the correct 303 * "embedded-ness". 304 */ 305 306 #define BPE_GET_ETYPE(bp) \ 307 (ASSERT(BP_IS_EMBEDDED(bp)), \ 308 BF64_GET((bp)->blk_prop, 40, 8)) 309 #define BPE_SET_ETYPE(bp, t) do { \ 310 ASSERT(BP_IS_EMBEDDED(bp)); \ 311 BF64_SET((bp)->blk_prop, 40, 8, t); \ 312 _NOTE(CONSTCOND) } while (0) 313 314 #define BPE_GET_LSIZE(bp) \ 315 (ASSERT(BP_IS_EMBEDDED(bp)), \ 316 BF64_GET_SB((bp)->blk_prop, 0, 25, 0, 1)) 317 #define BPE_SET_LSIZE(bp, x) do { \ 318 ASSERT(BP_IS_EMBEDDED(bp)); \ 319 BF64_SET_SB((bp)->blk_prop, 0, 25, 0, 1, x); \ 320 _NOTE(CONSTCOND) } while (0) 321 322 #define BPE_GET_PSIZE(bp) \ 323 (ASSERT(BP_IS_EMBEDDED(bp)), \ 324 BF64_GET_SB((bp)->blk_prop, 25, 7, 0, 1)) 325 #define BPE_SET_PSIZE(bp, x) do { \ 326 ASSERT(BP_IS_EMBEDDED(bp)); \ 327 BF64_SET_SB((bp)->blk_prop, 25, 7, 0, 1, x); \ 328 _NOTE(CONSTCOND) } while (0) 329 330 typedef enum bp_embedded_type { 331 BP_EMBEDDED_TYPE_DATA, 332 BP_EMBEDDED_TYPE_RESERVED, /* Reserved for an unintegrated feature. */ 333 NUM_BP_EMBEDDED_TYPES = BP_EMBEDDED_TYPE_RESERVED 334 } bp_embedded_type_t; 335 336 #define BPE_NUM_WORDS 14 337 #define BPE_PAYLOAD_SIZE (BPE_NUM_WORDS * sizeof (uint64_t)) 338 #define BPE_IS_PAYLOADWORD(bp, wp) \ 339 ((wp) != &(bp)->blk_prop && (wp) != &(bp)->blk_birth) 340 341 #define SPA_BLKPTRSHIFT 7 /* blkptr_t is 128 bytes */ 342 #define SPA_DVAS_PER_BP 3 /* Number of DVAs in a bp */ 343 #define SPA_SYNC_MIN_VDEVS 3 /* min vdevs to update during sync */ 344 345 /* 346 * A block is a hole when it has either 1) never been written to, or 347 * 2) is zero-filled. In both cases, ZFS can return all zeroes for all reads 348 * without physically allocating disk space. Holes are represented in the 349 * blkptr_t structure by zeroed blk_dva. Correct checking for holes is 350 * done through the BP_IS_HOLE macro. For holes, the logical size, level, 351 * DMU object type, and birth times are all also stored for holes that 352 * were written to at some point (i.e. were punched after having been filled). 353 */ 354 typedef struct blkptr { 355 dva_t blk_dva[SPA_DVAS_PER_BP]; /* Data Virtual Addresses */ 356 uint64_t blk_prop; /* size, compression, type, etc */ 357 uint64_t blk_pad[2]; /* Extra space for the future */ 358 uint64_t blk_phys_birth; /* txg when block was allocated */ 359 uint64_t blk_birth; /* transaction group at birth */ 360 uint64_t blk_fill; /* fill count */ 361 zio_cksum_t blk_cksum; /* 256-bit checksum */ 362 } blkptr_t; 363 364 /* 365 * Macros to get and set fields in a bp or DVA. 366 */ 367 #define DVA_GET_ASIZE(dva) \ 368 BF64_GET_SB((dva)->dva_word[0], 0, SPA_ASIZEBITS, SPA_MINBLOCKSHIFT, 0) 369 #define DVA_SET_ASIZE(dva, x) \ 370 BF64_SET_SB((dva)->dva_word[0], 0, SPA_ASIZEBITS, \ 371 SPA_MINBLOCKSHIFT, 0, x) 372 373 #define DVA_GET_GRID(dva) BF64_GET((dva)->dva_word[0], 24, 8) 374 #define DVA_SET_GRID(dva, x) BF64_SET((dva)->dva_word[0], 24, 8, x) 375 376 #define DVA_GET_VDEV(dva) BF64_GET((dva)->dva_word[0], 32, SPA_VDEVBITS) 377 #define DVA_SET_VDEV(dva, x) \ 378 BF64_SET((dva)->dva_word[0], 32, SPA_VDEVBITS, x) 379 380 #define DVA_GET_OFFSET(dva) \ 381 BF64_GET_SB((dva)->dva_word[1], 0, 63, SPA_MINBLOCKSHIFT, 0) 382 #define DVA_SET_OFFSET(dva, x) \ 383 BF64_SET_SB((dva)->dva_word[1], 0, 63, SPA_MINBLOCKSHIFT, 0, x) 384 385 #define DVA_GET_GANG(dva) BF64_GET((dva)->dva_word[1], 63, 1) 386 #define DVA_SET_GANG(dva, x) BF64_SET((dva)->dva_word[1], 63, 1, x) 387 388 #define BP_GET_LSIZE(bp) \ 389 (BP_IS_EMBEDDED(bp) ? \ 390 (BPE_GET_ETYPE(bp) == BP_EMBEDDED_TYPE_DATA ? BPE_GET_LSIZE(bp) : 0): \ 391 BF64_GET_SB((bp)->blk_prop, 0, SPA_LSIZEBITS, SPA_MINBLOCKSHIFT, 1)) 392 #define BP_SET_LSIZE(bp, x) do { \ 393 ASSERT(!BP_IS_EMBEDDED(bp)); \ 394 BF64_SET_SB((bp)->blk_prop, \ 395 0, SPA_LSIZEBITS, SPA_MINBLOCKSHIFT, 1, x); \ 396 _NOTE(CONSTCOND) } while (0) 397 398 #define BP_GET_PSIZE(bp) \ 399 (BP_IS_EMBEDDED(bp) ? 0 : \ 400 BF64_GET_SB((bp)->blk_prop, 16, SPA_PSIZEBITS, SPA_MINBLOCKSHIFT, 1)) 401 #define BP_SET_PSIZE(bp, x) do { \ 402 ASSERT(!BP_IS_EMBEDDED(bp)); \ 403 BF64_SET_SB((bp)->blk_prop, \ 404 16, SPA_PSIZEBITS, SPA_MINBLOCKSHIFT, 1, x); \ 405 _NOTE(CONSTCOND) } while (0) 406 407 #define BP_GET_COMPRESS(bp) \ 408 BF64_GET((bp)->blk_prop, 32, SPA_COMPRESSBITS) 409 #define BP_SET_COMPRESS(bp, x) \ 410 BF64_SET((bp)->blk_prop, 32, SPA_COMPRESSBITS, x) 411 412 #define BP_IS_EMBEDDED(bp) BF64_GET((bp)->blk_prop, 39, 1) 413 #define BP_SET_EMBEDDED(bp, x) BF64_SET((bp)->blk_prop, 39, 1, x) 414 415 #define BP_GET_CHECKSUM(bp) \ 416 (BP_IS_EMBEDDED(bp) ? ZIO_CHECKSUM_OFF : \ 417 BF64_GET((bp)->blk_prop, 40, 8)) 418 #define BP_SET_CHECKSUM(bp, x) do { \ 419 ASSERT(!BP_IS_EMBEDDED(bp)); \ 420 BF64_SET((bp)->blk_prop, 40, 8, x); \ 421 _NOTE(CONSTCOND) } while (0) 422 423 #define BP_GET_TYPE(bp) BF64_GET((bp)->blk_prop, 48, 8) 424 #define BP_SET_TYPE(bp, x) BF64_SET((bp)->blk_prop, 48, 8, x) 425 426 #define BP_GET_LEVEL(bp) BF64_GET((bp)->blk_prop, 56, 5) 427 #define BP_SET_LEVEL(bp, x) BF64_SET((bp)->blk_prop, 56, 5, x) 428 429 #define BP_GET_DEDUP(bp) BF64_GET((bp)->blk_prop, 62, 1) 430 #define BP_SET_DEDUP(bp, x) BF64_SET((bp)->blk_prop, 62, 1, x) 431 432 #define BP_GET_BYTEORDER(bp) BF64_GET((bp)->blk_prop, 63, 1) 433 #define BP_SET_BYTEORDER(bp, x) BF64_SET((bp)->blk_prop, 63, 1, x) 434 435 #define BP_PHYSICAL_BIRTH(bp) \ 436 (BP_IS_EMBEDDED(bp) ? 0 : \ 437 (bp)->blk_phys_birth ? (bp)->blk_phys_birth : (bp)->blk_birth) 438 439 #define BP_SET_BIRTH(bp, logical, physical) \ 440 { \ 441 ASSERT(!BP_IS_EMBEDDED(bp)); \ 442 (bp)->blk_birth = (logical); \ 443 (bp)->blk_phys_birth = ((logical) == (physical) ? 0 : (physical)); \ 444 } 445 446 #define BP_GET_FILL(bp) (BP_IS_EMBEDDED(bp) ? 1 : (bp)->blk_fill) 447 448 #define BP_IS_METADATA(bp) \ 449 (BP_GET_LEVEL(bp) > 0 || DMU_OT_IS_METADATA(BP_GET_TYPE(bp))) 450 451 #define BP_GET_ASIZE(bp) \ 452 (BP_IS_EMBEDDED(bp) ? 0 : \ 453 DVA_GET_ASIZE(&(bp)->blk_dva[0]) + \ 454 DVA_GET_ASIZE(&(bp)->blk_dva[1]) + \ 455 DVA_GET_ASIZE(&(bp)->blk_dva[2])) 456 457 #define BP_GET_UCSIZE(bp) \ 458 (BP_IS_METADATA(bp) ? BP_GET_PSIZE(bp) : BP_GET_LSIZE(bp)) 459 460 #define BP_GET_NDVAS(bp) \ 461 (BP_IS_EMBEDDED(bp) ? 0 : \ 462 !!DVA_GET_ASIZE(&(bp)->blk_dva[0]) + \ 463 !!DVA_GET_ASIZE(&(bp)->blk_dva[1]) + \ 464 !!DVA_GET_ASIZE(&(bp)->blk_dva[2])) 465 466 #define BP_COUNT_GANG(bp) \ 467 (BP_IS_EMBEDDED(bp) ? 0 : \ 468 (DVA_GET_GANG(&(bp)->blk_dva[0]) + \ 469 DVA_GET_GANG(&(bp)->blk_dva[1]) + \ 470 DVA_GET_GANG(&(bp)->blk_dva[2]))) 471 472 #define DVA_EQUAL(dva1, dva2) \ 473 ((dva1)->dva_word[1] == (dva2)->dva_word[1] && \ 474 (dva1)->dva_word[0] == (dva2)->dva_word[0]) 475 476 #define BP_EQUAL(bp1, bp2) \ 477 (BP_PHYSICAL_BIRTH(bp1) == BP_PHYSICAL_BIRTH(bp2) && \ 478 (bp1)->blk_birth == (bp2)->blk_birth && \ 479 DVA_EQUAL(&(bp1)->blk_dva[0], &(bp2)->blk_dva[0]) && \ 480 DVA_EQUAL(&(bp1)->blk_dva[1], &(bp2)->blk_dva[1]) && \ 481 DVA_EQUAL(&(bp1)->blk_dva[2], &(bp2)->blk_dva[2])) 482 483 #define ZIO_CHECKSUM_EQUAL(zc1, zc2) \ 484 (0 == (((zc1).zc_word[0] - (zc2).zc_word[0]) | \ 485 ((zc1).zc_word[1] - (zc2).zc_word[1]) | \ 486 ((zc1).zc_word[2] - (zc2).zc_word[2]) | \ 487 ((zc1).zc_word[3] - (zc2).zc_word[3]))) 488 489 #define ZIO_CHECKSUM_IS_ZERO(zc) \ 490 (0 == ((zc)->zc_word[0] | (zc)->zc_word[1] | \ 491 (zc)->zc_word[2] | (zc)->zc_word[3])) 492 493 #define ZIO_CHECKSUM_BSWAP(zcp) \ 494 { \ 495 (zcp)->zc_word[0] = BSWAP_64((zcp)->zc_word[0]); \ 496 (zcp)->zc_word[1] = BSWAP_64((zcp)->zc_word[1]); \ 497 (zcp)->zc_word[2] = BSWAP_64((zcp)->zc_word[2]); \ 498 (zcp)->zc_word[3] = BSWAP_64((zcp)->zc_word[3]); \ 499 } 500 501 502 #define DVA_IS_VALID(dva) (DVA_GET_ASIZE(dva) != 0) 503 504 #define ZIO_SET_CHECKSUM(zcp, w0, w1, w2, w3) \ 505 { \ 506 (zcp)->zc_word[0] = w0; \ 507 (zcp)->zc_word[1] = w1; \ 508 (zcp)->zc_word[2] = w2; \ 509 (zcp)->zc_word[3] = w3; \ 510 } 511 512 #define BP_IDENTITY(bp) (ASSERT(!BP_IS_EMBEDDED(bp)), &(bp)->blk_dva[0]) 513 #define BP_IS_GANG(bp) \ 514 (BP_IS_EMBEDDED(bp) ? B_FALSE : DVA_GET_GANG(BP_IDENTITY(bp))) 515 #define DVA_IS_EMPTY(dva) ((dva)->dva_word[0] == 0ULL && \ 516 (dva)->dva_word[1] == 0ULL) 517 #define BP_IS_HOLE(bp) \ 518 (!BP_IS_EMBEDDED(bp) && DVA_IS_EMPTY(BP_IDENTITY(bp))) 519 520 /* BP_IS_RAIDZ(bp) assumes no block compression */ 521 #define BP_IS_RAIDZ(bp) (DVA_GET_ASIZE(&(bp)->blk_dva[0]) > \ 522 BP_GET_PSIZE(bp)) 523 524 #define BP_ZERO(bp) \ 525 { \ 526 (bp)->blk_dva[0].dva_word[0] = 0; \ 527 (bp)->blk_dva[0].dva_word[1] = 0; \ 528 (bp)->blk_dva[1].dva_word[0] = 0; \ 529 (bp)->blk_dva[1].dva_word[1] = 0; \ 530 (bp)->blk_dva[2].dva_word[0] = 0; \ 531 (bp)->blk_dva[2].dva_word[1] = 0; \ 532 (bp)->blk_prop = 0; \ 533 (bp)->blk_pad[0] = 0; \ 534 (bp)->blk_pad[1] = 0; \ 535 (bp)->blk_phys_birth = 0; \ 536 (bp)->blk_birth = 0; \ 537 (bp)->blk_fill = 0; \ 538 ZIO_SET_CHECKSUM(&(bp)->blk_cksum, 0, 0, 0, 0); \ 539 } 540 541 #if BYTE_ORDER == _BIG_ENDIAN 542 #define ZFS_HOST_BYTEORDER (0ULL) 543 #else 544 #define ZFS_HOST_BYTEORDER (1ULL) 545 #endif 546 547 #define BP_SHOULD_BYTESWAP(bp) (BP_GET_BYTEORDER(bp) != ZFS_HOST_BYTEORDER) 548 549 #define BP_SPRINTF_LEN 320 550 551 /* 552 * This macro allows code sharing between zfs, libzpool, and mdb. 553 * 'func' is either snprintf() or mdb_snprintf(). 554 * 'ws' (whitespace) can be ' ' for single-line format, '\n' for multi-line. 555 */ 556 #define SNPRINTF_BLKPTR(func, ws, buf, size, bp, type, checksum, compress) \ 557 { \ 558 static const char *copyname[] = \ 559 { "zero", "single", "double", "triple" }; \ 560 int len = 0; \ 561 int copies = 0; \ 562 \ 563 if (bp == NULL) { \ 564 len += func(buf + len, size - len, "<NULL>"); \ 565 } else if (BP_IS_HOLE(bp)) { \ 566 len += func(buf + len, size - len, \ 567 "HOLE [L%llu %s] " \ 568 "size=%llxL birth=%lluL", \ 569 (u_longlong_t)BP_GET_LEVEL(bp), \ 570 type, \ 571 (u_longlong_t)BP_GET_LSIZE(bp), \ 572 (u_longlong_t)bp->blk_birth); \ 573 } else if (BP_IS_EMBEDDED(bp)) { \ 574 len = func(buf + len, size - len, \ 575 "EMBEDDED [L%llu %s] et=%u %s " \ 576 "size=%llxL/%llxP birth=%lluL", \ 577 (u_longlong_t)BP_GET_LEVEL(bp), \ 578 type, \ 579 (int)BPE_GET_ETYPE(bp), \ 580 compress, \ 581 (u_longlong_t)BPE_GET_LSIZE(bp), \ 582 (u_longlong_t)BPE_GET_PSIZE(bp), \ 583 (u_longlong_t)bp->blk_birth); \ 584 } else { \ 585 for (int d = 0; d < BP_GET_NDVAS(bp); d++) { \ 586 const dva_t *dva = &bp->blk_dva[d]; \ 587 if (DVA_IS_VALID(dva)) \ 588 copies++; \ 589 len += func(buf + len, size - len, \ 590 "DVA[%d]=<%llu:%llx:%llx>%c", d, \ 591 (u_longlong_t)DVA_GET_VDEV(dva), \ 592 (u_longlong_t)DVA_GET_OFFSET(dva), \ 593 (u_longlong_t)DVA_GET_ASIZE(dva), \ 594 ws); \ 595 } \ 596 if (BP_IS_GANG(bp) && \ 597 DVA_GET_ASIZE(&bp->blk_dva[2]) <= \ 598 DVA_GET_ASIZE(&bp->blk_dva[1]) / 2) \ 599 copies--; \ 600 len += func(buf + len, size - len, \ 601 "[L%llu %s] %s %s %s %s %s %s%c" \ 602 "size=%llxL/%llxP birth=%lluL/%lluP fill=%llu%c" \ 603 "cksum=%llx:%llx:%llx:%llx", \ 604 (u_longlong_t)BP_GET_LEVEL(bp), \ 605 type, \ 606 checksum, \ 607 compress, \ 608 BP_GET_BYTEORDER(bp) == 0 ? "BE" : "LE", \ 609 BP_IS_GANG(bp) ? "gang" : "contiguous", \ 610 BP_GET_DEDUP(bp) ? "dedup" : "unique", \ 611 copyname[copies], \ 612 ws, \ 613 (u_longlong_t)BP_GET_LSIZE(bp), \ 614 (u_longlong_t)BP_GET_PSIZE(bp), \ 615 (u_longlong_t)bp->blk_birth, \ 616 (u_longlong_t)BP_PHYSICAL_BIRTH(bp), \ 617 (u_longlong_t)BP_GET_FILL(bp), \ 618 ws, \ 619 (u_longlong_t)bp->blk_cksum.zc_word[0], \ 620 (u_longlong_t)bp->blk_cksum.zc_word[1], \ 621 (u_longlong_t)bp->blk_cksum.zc_word[2], \ 622 (u_longlong_t)bp->blk_cksum.zc_word[3]); \ 623 } \ 624 ASSERT(len < size); \ 625 } 626 627 #define BP_GET_BUFC_TYPE(bp) \ 628 (BP_IS_METADATA(bp) ? ARC_BUFC_METADATA : ARC_BUFC_DATA) 629 630 typedef enum spa_import_type { 631 SPA_IMPORT_EXISTING, 632 SPA_IMPORT_ASSEMBLE 633 } spa_import_type_t; 634 635 /* state manipulation functions */ 636 extern int spa_open(const char *pool, spa_t **, void *tag); 637 extern int spa_open_rewind(const char *pool, spa_t **, void *tag, 638 nvlist_t *policy, nvlist_t **config); 639 extern int spa_get_stats(const char *pool, nvlist_t **config, char *altroot, 640 size_t buflen); 641 extern int spa_create(const char *pool, nvlist_t *config, nvlist_t *props, 642 nvlist_t *zplprops); 643 #ifdef illumos 644 extern int spa_import_rootpool(char *devpath, char *devid); 645 #else 646 extern int spa_import_rootpool(const char *name); 647 #endif 648 extern int spa_import(const char *pool, nvlist_t *config, nvlist_t *props, 649 uint64_t flags); 650 extern nvlist_t *spa_tryimport(nvlist_t *tryconfig); 651 extern int spa_destroy(char *pool); 652 extern int spa_checkpoint(const char *pool); 653 extern int spa_checkpoint_discard(const char *pool); 654 extern int spa_export(char *pool, nvlist_t **oldconfig, boolean_t force, 655 boolean_t hardforce); 656 extern int spa_reset(char *pool); 657 extern void spa_async_request(spa_t *spa, int flag); 658 extern void spa_async_unrequest(spa_t *spa, int flag); 659 extern void spa_async_suspend(spa_t *spa); 660 extern void spa_async_resume(spa_t *spa); 661 extern spa_t *spa_inject_addref(char *pool); 662 extern void spa_inject_delref(spa_t *spa); 663 extern void spa_scan_stat_init(spa_t *spa); 664 extern int spa_scan_get_stats(spa_t *spa, pool_scan_stat_t *ps); 665 666 #define SPA_ASYNC_CONFIG_UPDATE 0x01 667 #define SPA_ASYNC_REMOVE 0x02 668 #define SPA_ASYNC_PROBE 0x04 669 #define SPA_ASYNC_RESILVER_DONE 0x08 670 #define SPA_ASYNC_RESILVER 0x10 671 #define SPA_ASYNC_AUTOEXPAND 0x20 672 #define SPA_ASYNC_REMOVE_DONE 0x40 673 #define SPA_ASYNC_REMOVE_STOP 0x80 674 #define SPA_ASYNC_INITIALIZE_RESTART 0x100 675 676 /* 677 * Controls the behavior of spa_vdev_remove(). 678 */ 679 #define SPA_REMOVE_UNSPARE 0x01 680 #define SPA_REMOVE_DONE 0x02 681 682 /* device manipulation */ 683 extern int spa_vdev_add(spa_t *spa, nvlist_t *nvroot); 684 extern int spa_vdev_attach(spa_t *spa, uint64_t guid, nvlist_t *nvroot, 685 int replacing); 686 extern int spa_vdev_detach(spa_t *spa, uint64_t guid, uint64_t pguid, 687 int replace_done); 688 extern int spa_vdev_remove(spa_t *spa, uint64_t guid, boolean_t unspare); 689 extern boolean_t spa_vdev_remove_active(spa_t *spa); 690 extern int spa_vdev_initialize(spa_t *spa, uint64_t guid, uint64_t cmd_type); 691 extern int spa_vdev_setpath(spa_t *spa, uint64_t guid, const char *newpath); 692 extern int spa_vdev_setfru(spa_t *spa, uint64_t guid, const char *newfru); 693 extern int spa_vdev_split_mirror(spa_t *spa, char *newname, nvlist_t *config, 694 nvlist_t *props, boolean_t exp); 695 696 /* spare state (which is global across all pools) */ 697 extern void spa_spare_add(vdev_t *vd); 698 extern void spa_spare_remove(vdev_t *vd); 699 extern boolean_t spa_spare_exists(uint64_t guid, uint64_t *pool, int *refcnt); 700 extern void spa_spare_activate(vdev_t *vd); 701 702 /* L2ARC state (which is global across all pools) */ 703 extern void spa_l2cache_add(vdev_t *vd); 704 extern void spa_l2cache_remove(vdev_t *vd); 705 extern boolean_t spa_l2cache_exists(uint64_t guid, uint64_t *pool); 706 extern void spa_l2cache_activate(vdev_t *vd); 707 extern void spa_l2cache_drop(spa_t *spa); 708 709 /* scanning */ 710 extern int spa_scan(spa_t *spa, pool_scan_func_t func); 711 extern int spa_scan_stop(spa_t *spa); 712 extern int spa_scrub_pause_resume(spa_t *spa, pool_scrub_cmd_t flag); 713 714 /* spa syncing */ 715 extern void spa_sync(spa_t *spa, uint64_t txg); /* only for DMU use */ 716 extern void spa_sync_allpools(void); 717 718 /* spa namespace global mutex */ 719 extern kmutex_t spa_namespace_lock; 720 721 /* 722 * SPA configuration functions in spa_config.c 723 */ 724 725 #define SPA_CONFIG_UPDATE_POOL 0 726 #define SPA_CONFIG_UPDATE_VDEVS 1 727 728 extern void spa_write_cachefile(spa_t *, boolean_t, boolean_t); 729 extern void spa_config_load(void); 730 extern nvlist_t *spa_all_configs(uint64_t *); 731 extern void spa_config_set(spa_t *spa, nvlist_t *config); 732 extern nvlist_t *spa_config_generate(spa_t *spa, vdev_t *vd, uint64_t txg, 733 int getstats); 734 extern void spa_config_update(spa_t *spa, int what); 735 736 /* 737 * Miscellaneous SPA routines in spa_misc.c 738 */ 739 740 /* Namespace manipulation */ 741 extern spa_t *spa_lookup(const char *name); 742 extern spa_t *spa_add(const char *name, nvlist_t *config, const char *altroot); 743 extern void spa_remove(spa_t *spa); 744 extern spa_t *spa_next(spa_t *prev); 745 746 /* Refcount functions */ 747 extern void spa_open_ref(spa_t *spa, void *tag); 748 extern void spa_close(spa_t *spa, void *tag); 749 extern void spa_async_close(spa_t *spa, void *tag); 750 extern boolean_t spa_refcount_zero(spa_t *spa); 751 752 #define SCL_NONE 0x00 753 #define SCL_CONFIG 0x01 754 #define SCL_STATE 0x02 755 #define SCL_L2ARC 0x04 /* hack until L2ARC 2.0 */ 756 #define SCL_ALLOC 0x08 757 #define SCL_ZIO 0x10 758 #define SCL_FREE 0x20 759 #define SCL_VDEV 0x40 760 #define SCL_LOCKS 7 761 #define SCL_ALL ((1 << SCL_LOCKS) - 1) 762 #define SCL_STATE_ALL (SCL_STATE | SCL_L2ARC | SCL_ZIO) 763 764 /* Pool configuration locks */ 765 extern int spa_config_tryenter(spa_t *spa, int locks, void *tag, krw_t rw); 766 extern void spa_config_enter(spa_t *spa, int locks, void *tag, krw_t rw); 767 extern void spa_config_exit(spa_t *spa, int locks, void *tag); 768 extern int spa_config_held(spa_t *spa, int locks, krw_t rw); 769 770 /* Pool vdev add/remove lock */ 771 extern uint64_t spa_vdev_enter(spa_t *spa); 772 extern uint64_t spa_vdev_config_enter(spa_t *spa); 773 extern void spa_vdev_config_exit(spa_t *spa, vdev_t *vd, uint64_t txg, 774 int error, char *tag); 775 extern int spa_vdev_exit(spa_t *spa, vdev_t *vd, uint64_t txg, int error); 776 777 /* Pool vdev state change lock */ 778 extern void spa_vdev_state_enter(spa_t *spa, int oplock); 779 extern int spa_vdev_state_exit(spa_t *spa, vdev_t *vd, int error); 780 781 /* Log state */ 782 typedef enum spa_log_state { 783 SPA_LOG_UNKNOWN = 0, /* unknown log state */ 784 SPA_LOG_MISSING, /* missing log(s) */ 785 SPA_LOG_CLEAR, /* clear the log(s) */ 786 SPA_LOG_GOOD, /* log(s) are good */ 787 } spa_log_state_t; 788 789 extern spa_log_state_t spa_get_log_state(spa_t *spa); 790 extern void spa_set_log_state(spa_t *spa, spa_log_state_t state); 791 extern int spa_reset_logs(spa_t *spa); 792 793 /* Log claim callback */ 794 extern void spa_claim_notify(zio_t *zio); 795 796 /* Accessor functions */ 797 extern boolean_t spa_shutting_down(spa_t *spa); 798 extern struct dsl_pool *spa_get_dsl(spa_t *spa); 799 extern boolean_t spa_is_initializing(spa_t *spa); 800 extern boolean_t spa_indirect_vdevs_loaded(spa_t *spa); 801 extern blkptr_t *spa_get_rootblkptr(spa_t *spa); 802 extern void spa_set_rootblkptr(spa_t *spa, const blkptr_t *bp); 803 extern void spa_altroot(spa_t *, char *, size_t); 804 extern int spa_sync_pass(spa_t *spa); 805 extern char *spa_name(spa_t *spa); 806 extern uint64_t spa_guid(spa_t *spa); 807 extern uint64_t spa_load_guid(spa_t *spa); 808 extern uint64_t spa_last_synced_txg(spa_t *spa); 809 extern uint64_t spa_first_txg(spa_t *spa); 810 extern uint64_t spa_syncing_txg(spa_t *spa); 811 extern uint64_t spa_final_dirty_txg(spa_t *spa); 812 extern uint64_t spa_version(spa_t *spa); 813 extern pool_state_t spa_state(spa_t *spa); 814 extern spa_load_state_t spa_load_state(spa_t *spa); 815 extern uint64_t spa_freeze_txg(spa_t *spa); 816 extern uint64_t spa_get_worst_case_asize(spa_t *spa, uint64_t lsize); 817 extern uint64_t spa_get_dspace(spa_t *spa); 818 extern uint64_t spa_get_checkpoint_space(spa_t *spa); 819 extern uint64_t spa_get_slop_space(spa_t *spa); 820 extern void spa_update_dspace(spa_t *spa); 821 extern uint64_t spa_version(spa_t *spa); 822 extern boolean_t spa_deflate(spa_t *spa); 823 extern metaslab_class_t *spa_normal_class(spa_t *spa); 824 extern metaslab_class_t *spa_log_class(spa_t *spa); 825 extern metaslab_class_t *spa_special_class(spa_t *spa); 826 extern metaslab_class_t *spa_dedup_class(spa_t *spa); 827 extern metaslab_class_t *spa_preferred_class(spa_t *spa, uint64_t size, 828 dmu_object_type_t objtype, uint_t level, uint_t special_smallblk); 829 830 extern void spa_evicting_os_register(spa_t *, objset_t *os); 831 extern void spa_evicting_os_deregister(spa_t *, objset_t *os); 832 extern void spa_evicting_os_wait(spa_t *spa); 833 extern int spa_max_replication(spa_t *spa); 834 extern int spa_prev_software_version(spa_t *spa); 835 extern int spa_busy(void); 836 extern uint8_t spa_get_failmode(spa_t *spa); 837 extern boolean_t spa_suspended(spa_t *spa); 838 extern uint64_t spa_bootfs(spa_t *spa); 839 extern uint64_t spa_delegation(spa_t *spa); 840 extern objset_t *spa_meta_objset(spa_t *spa); 841 extern uint64_t spa_deadman_synctime(spa_t *spa); 842 extern struct proc *spa_proc(spa_t *spa); 843 extern uint64_t spa_dirty_data(spa_t *spa); 844 845 /* Miscellaneous support routines */ 846 extern void spa_load_failed(spa_t *spa, const char *fmt, ...); 847 extern void spa_load_note(spa_t *spa, const char *fmt, ...); 848 extern void spa_activate_mos_feature(spa_t *spa, const char *feature, 849 dmu_tx_t *tx); 850 extern void spa_deactivate_mos_feature(spa_t *spa, const char *feature); 851 extern spa_t *spa_by_guid(uint64_t pool_guid, uint64_t device_guid); 852 extern boolean_t spa_guid_exists(uint64_t pool_guid, uint64_t device_guid); 853 extern char *spa_strdup(const char *); 854 extern void spa_strfree(char *); 855 extern uint64_t spa_get_random(uint64_t range); 856 extern uint64_t spa_generate_guid(spa_t *spa); 857 extern void snprintf_blkptr(char *buf, size_t buflen, const blkptr_t *bp); 858 extern void spa_freeze(spa_t *spa); 859 extern int spa_change_guid(spa_t *spa); 860 extern void spa_upgrade(spa_t *spa, uint64_t version); 861 extern void spa_evict_all(void); 862 extern vdev_t *spa_lookup_by_guid(spa_t *spa, uint64_t guid, 863 boolean_t l2cache); 864 extern boolean_t spa_has_spare(spa_t *, uint64_t guid); 865 extern uint64_t dva_get_dsize_sync(spa_t *spa, const dva_t *dva); 866 extern uint64_t bp_get_dsize_sync(spa_t *spa, const blkptr_t *bp); 867 extern uint64_t bp_get_dsize(spa_t *spa, const blkptr_t *bp); 868 extern boolean_t spa_has_slogs(spa_t *spa); 869 extern boolean_t spa_is_root(spa_t *spa); 870 extern boolean_t spa_writeable(spa_t *spa); 871 extern boolean_t spa_has_pending_synctask(spa_t *spa); 872 extern int spa_maxblocksize(spa_t *spa); 873 extern int spa_maxdnodesize(spa_t *spa); 874 extern boolean_t spa_multihost(spa_t *spa); 875 extern unsigned long spa_get_hostid(void); 876 extern boolean_t spa_has_checkpoint(spa_t *spa); 877 extern boolean_t spa_importing_readonly_checkpoint(spa_t *spa); 878 extern boolean_t spa_suspend_async_destroy(spa_t *spa); 879 extern uint64_t spa_min_claim_txg(spa_t *spa); 880 extern void zfs_blkptr_verify(spa_t *spa, const blkptr_t *bp); 881 extern boolean_t zfs_dva_valid(spa_t *spa, const dva_t *dva, 882 const blkptr_t *bp); 883 typedef void (*spa_remap_cb_t)(uint64_t vdev, uint64_t offset, uint64_t size, 884 void *arg); 885 extern boolean_t spa_remap_blkptr(spa_t *spa, blkptr_t *bp, 886 spa_remap_cb_t callback, void *arg); 887 extern uint64_t spa_get_last_removal_txg(spa_t *spa); 888 extern boolean_t spa_trust_config(spa_t *spa); 889 extern uint64_t spa_missing_tvds_allowed(spa_t *spa); 890 extern void spa_set_missing_tvds(spa_t *spa, uint64_t missing); 891 extern boolean_t spa_top_vdevs_spacemap_addressable(spa_t *spa); 892 extern void spa_activate_allocation_classes(spa_t *, dmu_tx_t *); 893 894 extern int spa_mode(spa_t *spa); 895 extern uint64_t zfs_strtonum(const char *str, char **nptr); 896 897 extern char *spa_his_ievent_table[]; 898 899 extern void spa_history_create_obj(spa_t *spa, dmu_tx_t *tx); 900 extern int spa_history_get(spa_t *spa, uint64_t *offset, uint64_t *len_read, 901 char *his_buf); 902 extern int spa_history_log(spa_t *spa, const char *his_buf); 903 extern int spa_history_log_nvl(spa_t *spa, nvlist_t *nvl); 904 extern void spa_history_log_version(spa_t *spa, const char *operation); 905 extern void spa_history_log_internal(spa_t *spa, const char *operation, 906 dmu_tx_t *tx, const char *fmt, ...); 907 extern void spa_history_log_internal_ds(struct dsl_dataset *ds, const char *op, 908 dmu_tx_t *tx, const char *fmt, ...); 909 extern void spa_history_log_internal_dd(dsl_dir_t *dd, const char *operation, 910 dmu_tx_t *tx, const char *fmt, ...); 911 912 /* error handling */ 913 struct zbookmark_phys; 914 extern void spa_log_error(spa_t *spa, zio_t *zio); 915 extern void zfs_ereport_post(const char *cls, spa_t *spa, vdev_t *vd, 916 zio_t *zio, uint64_t stateoroffset, uint64_t length); 917 extern void zfs_post_remove(spa_t *spa, vdev_t *vd); 918 extern void zfs_post_state_change(spa_t *spa, vdev_t *vd); 919 extern void zfs_post_autoreplace(spa_t *spa, vdev_t *vd); 920 extern uint64_t spa_get_errlog_size(spa_t *spa); 921 extern int spa_get_errlog(spa_t *spa, void *uaddr, size_t *count); 922 extern void spa_errlog_rotate(spa_t *spa); 923 extern void spa_errlog_drain(spa_t *spa); 924 extern void spa_errlog_sync(spa_t *spa, uint64_t txg); 925 extern void spa_get_errlists(spa_t *spa, avl_tree_t *last, avl_tree_t *scrub); 926 927 /* vdev cache */ 928 extern void vdev_cache_stat_init(void); 929 extern void vdev_cache_stat_fini(void); 930 931 /* Initialization and termination */ 932 extern void spa_init(int flags); 933 extern void spa_fini(void); 934 extern void spa_boot_init(void); 935 936 /* properties */ 937 extern int spa_prop_set(spa_t *spa, nvlist_t *nvp); 938 extern int spa_prop_get(spa_t *spa, nvlist_t **nvp); 939 extern void spa_prop_clear_bootfs(spa_t *spa, uint64_t obj, dmu_tx_t *tx); 940 extern void spa_configfile_set(spa_t *, nvlist_t *, boolean_t); 941 942 /* asynchronous event notification */ 943 extern void spa_event_notify(spa_t *spa, vdev_t *vdev, nvlist_t *hist_nvl, 944 const char *name); 945 extern sysevent_t *spa_event_create(spa_t *spa, vdev_t *vd, nvlist_t *hist_nvl, 946 const char *name); 947 extern void spa_event_post(sysevent_t *ev); 948 extern void spa_event_discard(sysevent_t *ev); 949 950 #ifdef ZFS_DEBUG 951 #define dprintf_bp(bp, fmt, ...) do { \ 952 if (zfs_flags & ZFS_DEBUG_DPRINTF) { \ 953 char *__blkbuf = kmem_alloc(BP_SPRINTF_LEN, KM_SLEEP); \ 954 snprintf_blkptr(__blkbuf, BP_SPRINTF_LEN, (bp)); \ 955 dprintf(fmt " %s\n", __VA_ARGS__, __blkbuf); \ 956 kmem_free(__blkbuf, BP_SPRINTF_LEN); \ 957 } \ 958 _NOTE(CONSTCOND) } while (0) 959 #else 960 #define dprintf_bp(bp, fmt, ...) 961 #endif 962 963 extern int spa_mode_global; /* mode, e.g. FREAD | FWRITE */ 964 965 #ifdef __cplusplus 966 } 967 #endif 968 969 #endif /* _SYS_SPA_H */ 970