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