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