spa.h revision 263397
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) 2013 by Delphix. All rights reserved. 24 * Copyright 2011 Nexenta Systems, Inc. All rights reserved. 25 */ 26 27#ifndef _SYS_SPA_H 28#define _SYS_SPA_H 29 30#include <sys/avl.h> 31#include <sys/zfs_context.h> 32#include <sys/nvpair.h> 33#include <sys/sysmacros.h> 34#include <sys/types.h> 35#include <sys/fs/zfs.h> 36 37#ifdef __cplusplus 38extern "C" { 39#endif 40 41/* 42 * Forward references that lots of things need. 43 */ 44typedef struct spa spa_t; 45typedef struct vdev vdev_t; 46typedef struct metaslab metaslab_t; 47typedef struct metaslab_group metaslab_group_t; 48typedef struct metaslab_class metaslab_class_t; 49typedef struct zio zio_t; 50typedef struct zilog zilog_t; 51typedef struct spa_aux_vdev spa_aux_vdev_t; 52typedef struct ddt ddt_t; 53typedef struct ddt_entry ddt_entry_t; 54struct dsl_pool; 55struct dsl_dataset; 56 57/* 58 * General-purpose 32-bit and 64-bit bitfield encodings. 59 */ 60#define BF32_DECODE(x, low, len) P2PHASE((x) >> (low), 1U << (len)) 61#define BF64_DECODE(x, low, len) P2PHASE((x) >> (low), 1ULL << (len)) 62#define BF32_ENCODE(x, low, len) (P2PHASE((x), 1U << (len)) << (low)) 63#define BF64_ENCODE(x, low, len) (P2PHASE((x), 1ULL << (len)) << (low)) 64 65#define BF32_GET(x, low, len) BF32_DECODE(x, low, len) 66#define BF64_GET(x, low, len) BF64_DECODE(x, low, len) 67 68#define BF32_SET(x, low, len, val) do { \ 69 ASSERT3U(val, <, 1U << (len)); \ 70 ASSERT3U(low + len, <=, 32); \ 71 (x) ^= BF32_ENCODE((x >> low) ^ (val), low, len); \ 72_NOTE(CONSTCOND) } while (0) 73 74#define BF64_SET(x, low, len, val) do { \ 75 ASSERT3U(val, <, 1ULL << (len)); \ 76 ASSERT3U(low + len, <=, 64); \ 77 ((x) ^= BF64_ENCODE((x >> low) ^ (val), low, len)); \ 78_NOTE(CONSTCOND) } while (0) 79 80#define BF32_GET_SB(x, low, len, shift, bias) \ 81 ((BF32_GET(x, low, len) + (bias)) << (shift)) 82#define BF64_GET_SB(x, low, len, shift, bias) \ 83 ((BF64_GET(x, low, len) + (bias)) << (shift)) 84 85#define BF32_SET_SB(x, low, len, shift, bias, val) do { \ 86 ASSERT(IS_P2ALIGNED(val, 1U << shift)); \ 87 ASSERT3S((val) >> (shift), >=, bias); \ 88 BF32_SET(x, low, len, ((val) >> (shift)) - (bias)); \ 89_NOTE(CONSTCOND) } while (0) 90#define BF64_SET_SB(x, low, len, shift, bias, val) do { \ 91 ASSERT(IS_P2ALIGNED(val, 1ULL << shift)); \ 92 ASSERT3S((val) >> (shift), >=, bias); \ 93 BF64_SET(x, low, len, ((val) >> (shift)) - (bias)); \ 94_NOTE(CONSTCOND) } while (0) 95 96/* 97 * We currently support nine block sizes, from 512 bytes to 128K. 98 * We could go higher, but the benefits are near-zero and the cost 99 * of COWing a giant block to modify one byte would become excessive. 100 */ 101#define SPA_MINBLOCKSHIFT 9 102#define SPA_MAXBLOCKSHIFT 17 103#define SPA_MINBLOCKSIZE (1ULL << SPA_MINBLOCKSHIFT) 104#define SPA_MAXBLOCKSIZE (1ULL << SPA_MAXBLOCKSHIFT) 105 106#define SPA_BLOCKSIZES (SPA_MAXBLOCKSHIFT - SPA_MINBLOCKSHIFT + 1) 107 108/* 109 * Maximum supported logical ashift. 110 * 111 * The current 8k allocation block size limit is due to the 8k 112 * aligned/sized operations performed by vdev_probe() on 113 * vdev_label->vl_pad2. Using another "safe region" for these tests 114 * would allow the limit to be raised to 16k, at the expense of 115 * only having 8 available uberblocks in the label area. 116 */ 117#define SPA_MAXASHIFT 13 118 119/* 120 * Size of block to hold the configuration data (a packed nvlist) 121 */ 122#define SPA_CONFIG_BLOCKSIZE (1ULL << 14) 123 124/* 125 * The DVA size encodings for LSIZE and PSIZE support blocks up to 32MB. 126 * The ASIZE encoding should be at least 64 times larger (6 more bits) 127 * to support up to 4-way RAID-Z mirror mode with worst-case gang block 128 * overhead, three DVAs per bp, plus one more bit in case we do anything 129 * else that expands the ASIZE. 130 */ 131#define SPA_LSIZEBITS 16 /* LSIZE up to 32M (2^16 * 512) */ 132#define SPA_PSIZEBITS 16 /* PSIZE up to 32M (2^16 * 512) */ 133#define SPA_ASIZEBITS 24 /* ASIZE up to 64 times larger */ 134 135/* 136 * All SPA data is represented by 128-bit data virtual addresses (DVAs). 137 * The members of the dva_t should be considered opaque outside the SPA. 138 */ 139typedef struct dva { 140 uint64_t dva_word[2]; 141} dva_t; 142 143/* 144 * Each block has a 256-bit checksum -- strong enough for cryptographic hashes. 145 */ 146typedef struct zio_cksum { 147 uint64_t zc_word[4]; 148} zio_cksum_t; 149 150/* 151 * Each block is described by its DVAs, time of birth, checksum, etc. 152 * The word-by-word, bit-by-bit layout of the blkptr is as follows: 153 * 154 * 64 56 48 40 32 24 16 8 0 155 * +-------+-------+-------+-------+-------+-------+-------+-------+ 156 * 0 | vdev1 | GRID | ASIZE | 157 * +-------+-------+-------+-------+-------+-------+-------+-------+ 158 * 1 |G| offset1 | 159 * +-------+-------+-------+-------+-------+-------+-------+-------+ 160 * 2 | vdev2 | GRID | ASIZE | 161 * +-------+-------+-------+-------+-------+-------+-------+-------+ 162 * 3 |G| offset2 | 163 * +-------+-------+-------+-------+-------+-------+-------+-------+ 164 * 4 | vdev3 | GRID | ASIZE | 165 * +-------+-------+-------+-------+-------+-------+-------+-------+ 166 * 5 |G| offset3 | 167 * +-------+-------+-------+-------+-------+-------+-------+-------+ 168 * 6 |BDX|lvl| type | cksum | comp | PSIZE | LSIZE | 169 * +-------+-------+-------+-------+-------+-------+-------+-------+ 170 * 7 | padding | 171 * +-------+-------+-------+-------+-------+-------+-------+-------+ 172 * 8 | padding | 173 * +-------+-------+-------+-------+-------+-------+-------+-------+ 174 * 9 | physical birth txg | 175 * +-------+-------+-------+-------+-------+-------+-------+-------+ 176 * a | logical birth txg | 177 * +-------+-------+-------+-------+-------+-------+-------+-------+ 178 * b | fill count | 179 * +-------+-------+-------+-------+-------+-------+-------+-------+ 180 * c | checksum[0] | 181 * +-------+-------+-------+-------+-------+-------+-------+-------+ 182 * d | checksum[1] | 183 * +-------+-------+-------+-------+-------+-------+-------+-------+ 184 * e | checksum[2] | 185 * +-------+-------+-------+-------+-------+-------+-------+-------+ 186 * f | checksum[3] | 187 * +-------+-------+-------+-------+-------+-------+-------+-------+ 188 * 189 * Legend: 190 * 191 * vdev virtual device ID 192 * offset offset into virtual device 193 * LSIZE logical size 194 * PSIZE physical size (after compression) 195 * ASIZE allocated size (including RAID-Z parity and gang block headers) 196 * GRID RAID-Z layout information (reserved for future use) 197 * cksum checksum function 198 * comp compression function 199 * G gang block indicator 200 * B byteorder (endianness) 201 * D dedup 202 * X unused 203 * lvl level of indirection 204 * type DMU object type 205 * phys birth txg of block allocation; zero if same as logical birth txg 206 * log. birth transaction group in which the block was logically born 207 * fill count number of non-zero blocks under this bp 208 * checksum[4] 256-bit checksum of the data this bp describes 209 */ 210#define SPA_BLKPTRSHIFT 7 /* blkptr_t is 128 bytes */ 211#define SPA_DVAS_PER_BP 3 /* Number of DVAs in a bp */ 212 213/* 214 * A block is a hole when it has either 1) never been written to, or 215 * 2) is zero-filled. In both cases, ZFS can return all zeroes for all reads 216 * without physically allocating disk space. Holes are represented in the 217 * blkptr_t structure by zeroed blk_dva. Correct checking for holes is 218 * done through the BP_IS_HOLE macro. For holes, the logical size, level, 219 * DMU object type, and birth times are all also stored for holes that 220 * were written to at some point (i.e. were punched after having been filled). 221 */ 222typedef struct blkptr { 223 dva_t blk_dva[SPA_DVAS_PER_BP]; /* Data Virtual Addresses */ 224 uint64_t blk_prop; /* size, compression, type, etc */ 225 uint64_t blk_pad[2]; /* Extra space for the future */ 226 uint64_t blk_phys_birth; /* txg when block was allocated */ 227 uint64_t blk_birth; /* transaction group at birth */ 228 uint64_t blk_fill; /* fill count */ 229 zio_cksum_t blk_cksum; /* 256-bit checksum */ 230} blkptr_t; 231 232/* 233 * Macros to get and set fields in a bp or DVA. 234 */ 235#define DVA_GET_ASIZE(dva) \ 236 BF64_GET_SB((dva)->dva_word[0], 0, SPA_ASIZEBITS, SPA_MINBLOCKSHIFT, 0) 237#define DVA_SET_ASIZE(dva, x) \ 238 BF64_SET_SB((dva)->dva_word[0], 0, SPA_ASIZEBITS, \ 239 SPA_MINBLOCKSHIFT, 0, x) 240 241#define DVA_GET_GRID(dva) BF64_GET((dva)->dva_word[0], 24, 8) 242#define DVA_SET_GRID(dva, x) BF64_SET((dva)->dva_word[0], 24, 8, x) 243 244#define DVA_GET_VDEV(dva) BF64_GET((dva)->dva_word[0], 32, 32) 245#define DVA_SET_VDEV(dva, x) BF64_SET((dva)->dva_word[0], 32, 32, x) 246 247#define DVA_GET_OFFSET(dva) \ 248 BF64_GET_SB((dva)->dva_word[1], 0, 63, SPA_MINBLOCKSHIFT, 0) 249#define DVA_SET_OFFSET(dva, x) \ 250 BF64_SET_SB((dva)->dva_word[1], 0, 63, SPA_MINBLOCKSHIFT, 0, x) 251 252#define DVA_GET_GANG(dva) BF64_GET((dva)->dva_word[1], 63, 1) 253#define DVA_SET_GANG(dva, x) BF64_SET((dva)->dva_word[1], 63, 1, x) 254 255#define BP_GET_LSIZE(bp) \ 256 BF64_GET_SB((bp)->blk_prop, 0, SPA_LSIZEBITS, SPA_MINBLOCKSHIFT, 1) 257#define BP_SET_LSIZE(bp, x) \ 258 BF64_SET_SB((bp)->blk_prop, 0, SPA_LSIZEBITS, SPA_MINBLOCKSHIFT, 1, x) 259 260#define BP_GET_PSIZE(bp) \ 261 BF64_GET_SB((bp)->blk_prop, 16, SPA_PSIZEBITS, SPA_MINBLOCKSHIFT, 1) 262#define BP_SET_PSIZE(bp, x) \ 263 BF64_SET_SB((bp)->blk_prop, 16, SPA_PSIZEBITS, SPA_MINBLOCKSHIFT, 1, x) 264 265#define BP_GET_COMPRESS(bp) BF64_GET((bp)->blk_prop, 32, 8) 266#define BP_SET_COMPRESS(bp, x) BF64_SET((bp)->blk_prop, 32, 8, x) 267 268#define BP_GET_CHECKSUM(bp) BF64_GET((bp)->blk_prop, 40, 8) 269#define BP_SET_CHECKSUM(bp, x) BF64_SET((bp)->blk_prop, 40, 8, x) 270 271#define BP_GET_TYPE(bp) BF64_GET((bp)->blk_prop, 48, 8) 272#define BP_SET_TYPE(bp, x) BF64_SET((bp)->blk_prop, 48, 8, x) 273 274#define BP_GET_LEVEL(bp) BF64_GET((bp)->blk_prop, 56, 5) 275#define BP_SET_LEVEL(bp, x) BF64_SET((bp)->blk_prop, 56, 5, x) 276 277#define BP_GET_PROP_BIT_61(bp) BF64_GET((bp)->blk_prop, 61, 1) 278#define BP_SET_PROP_BIT_61(bp, x) BF64_SET((bp)->blk_prop, 61, 1, x) 279 280#define BP_GET_DEDUP(bp) BF64_GET((bp)->blk_prop, 62, 1) 281#define BP_SET_DEDUP(bp, x) BF64_SET((bp)->blk_prop, 62, 1, x) 282 283#define BP_GET_BYTEORDER(bp) BF64_GET((bp)->blk_prop, 63, 1) 284#define BP_SET_BYTEORDER(bp, x) BF64_SET((bp)->blk_prop, 63, 1, x) 285 286#define BP_PHYSICAL_BIRTH(bp) \ 287 ((bp)->blk_phys_birth ? (bp)->blk_phys_birth : (bp)->blk_birth) 288 289#define BP_SET_BIRTH(bp, logical, physical) \ 290{ \ 291 (bp)->blk_birth = (logical); \ 292 (bp)->blk_phys_birth = ((logical) == (physical) ? 0 : (physical)); \ 293} 294 295#define BP_GET_ASIZE(bp) \ 296 (DVA_GET_ASIZE(&(bp)->blk_dva[0]) + DVA_GET_ASIZE(&(bp)->blk_dva[1]) + \ 297 DVA_GET_ASIZE(&(bp)->blk_dva[2])) 298 299#define BP_GET_UCSIZE(bp) \ 300 ((BP_GET_LEVEL(bp) > 0 || DMU_OT_IS_METADATA(BP_GET_TYPE(bp))) ? \ 301 BP_GET_PSIZE(bp) : BP_GET_LSIZE(bp)) 302 303#define BP_GET_NDVAS(bp) \ 304 (!!DVA_GET_ASIZE(&(bp)->blk_dva[0]) + \ 305 !!DVA_GET_ASIZE(&(bp)->blk_dva[1]) + \ 306 !!DVA_GET_ASIZE(&(bp)->blk_dva[2])) 307 308#define BP_COUNT_GANG(bp) \ 309 (DVA_GET_GANG(&(bp)->blk_dva[0]) + \ 310 DVA_GET_GANG(&(bp)->blk_dva[1]) + \ 311 DVA_GET_GANG(&(bp)->blk_dva[2])) 312 313#define DVA_EQUAL(dva1, dva2) \ 314 ((dva1)->dva_word[1] == (dva2)->dva_word[1] && \ 315 (dva1)->dva_word[0] == (dva2)->dva_word[0]) 316 317#define BP_EQUAL(bp1, bp2) \ 318 (BP_PHYSICAL_BIRTH(bp1) == BP_PHYSICAL_BIRTH(bp2) && \ 319 DVA_EQUAL(&(bp1)->blk_dva[0], &(bp2)->blk_dva[0]) && \ 320 DVA_EQUAL(&(bp1)->blk_dva[1], &(bp2)->blk_dva[1]) && \ 321 DVA_EQUAL(&(bp1)->blk_dva[2], &(bp2)->blk_dva[2])) 322 323#define ZIO_CHECKSUM_EQUAL(zc1, zc2) \ 324 (0 == (((zc1).zc_word[0] - (zc2).zc_word[0]) | \ 325 ((zc1).zc_word[1] - (zc2).zc_word[1]) | \ 326 ((zc1).zc_word[2] - (zc2).zc_word[2]) | \ 327 ((zc1).zc_word[3] - (zc2).zc_word[3]))) 328 329#define DVA_IS_VALID(dva) (DVA_GET_ASIZE(dva) != 0) 330 331#define ZIO_SET_CHECKSUM(zcp, w0, w1, w2, w3) \ 332{ \ 333 (zcp)->zc_word[0] = w0; \ 334 (zcp)->zc_word[1] = w1; \ 335 (zcp)->zc_word[2] = w2; \ 336 (zcp)->zc_word[3] = w3; \ 337} 338 339#define BP_IDENTITY(bp) (&(bp)->blk_dva[0]) 340#define BP_IS_GANG(bp) DVA_GET_GANG(BP_IDENTITY(bp)) 341#define DVA_IS_EMPTY(dva) ((dva)->dva_word[0] == 0ULL && \ 342 (dva)->dva_word[1] == 0ULL) 343#define BP_IS_HOLE(bp) DVA_IS_EMPTY(BP_IDENTITY(bp)) 344 345/* BP_IS_RAIDZ(bp) assumes no block compression */ 346#define BP_IS_RAIDZ(bp) (DVA_GET_ASIZE(&(bp)->blk_dva[0]) > \ 347 BP_GET_PSIZE(bp)) 348 349#define BP_ZERO(bp) \ 350{ \ 351 (bp)->blk_dva[0].dva_word[0] = 0; \ 352 (bp)->blk_dva[0].dva_word[1] = 0; \ 353 (bp)->blk_dva[1].dva_word[0] = 0; \ 354 (bp)->blk_dva[1].dva_word[1] = 0; \ 355 (bp)->blk_dva[2].dva_word[0] = 0; \ 356 (bp)->blk_dva[2].dva_word[1] = 0; \ 357 (bp)->blk_prop = 0; \ 358 (bp)->blk_pad[0] = 0; \ 359 (bp)->blk_pad[1] = 0; \ 360 (bp)->blk_phys_birth = 0; \ 361 (bp)->blk_birth = 0; \ 362 (bp)->blk_fill = 0; \ 363 ZIO_SET_CHECKSUM(&(bp)->blk_cksum, 0, 0, 0, 0); \ 364} 365 366#if BYTE_ORDER == _BIG_ENDIAN 367#define ZFS_HOST_BYTEORDER (0ULL) 368#else 369#define ZFS_HOST_BYTEORDER (1ULL) 370#endif 371 372#define BP_SHOULD_BYTESWAP(bp) (BP_GET_BYTEORDER(bp) != ZFS_HOST_BYTEORDER) 373 374#define BP_SPRINTF_LEN 320 375 376/* 377 * This macro allows code sharing between zfs, libzpool, and mdb. 378 * 'func' is either snprintf() or mdb_snprintf(). 379 * 'ws' (whitespace) can be ' ' for single-line format, '\n' for multi-line. 380 */ 381#define SNPRINTF_BLKPTR(func, ws, buf, size, bp, type, checksum, compress) \ 382{ \ 383 static const char *copyname[] = \ 384 { "zero", "single", "double", "triple" }; \ 385 int len = 0; \ 386 int copies = 0; \ 387 \ 388 if (bp == NULL) { \ 389 len += func(buf + len, size - len, "<NULL>"); \ 390 } else if (BP_IS_HOLE(bp)) { \ 391 len += func(buf + len, size - len, "<hole>"); \ 392 if (bp->blk_birth > 0) { \ 393 len += func(buf + len, size - len, \ 394 " birth=%lluL", \ 395 (u_longlong_t)bp->blk_birth); \ 396 } \ 397 } else { \ 398 for (int d = 0; d < BP_GET_NDVAS(bp); d++) { \ 399 const dva_t *dva = &bp->blk_dva[d]; \ 400 if (DVA_IS_VALID(dva)) \ 401 copies++; \ 402 len += func(buf + len, size - len, \ 403 "DVA[%d]=<%llu:%llx:%llx>%c", d, \ 404 (u_longlong_t)DVA_GET_VDEV(dva), \ 405 (u_longlong_t)DVA_GET_OFFSET(dva), \ 406 (u_longlong_t)DVA_GET_ASIZE(dva), \ 407 ws); \ 408 } \ 409 if (BP_IS_GANG(bp) && \ 410 DVA_GET_ASIZE(&bp->blk_dva[2]) <= \ 411 DVA_GET_ASIZE(&bp->blk_dva[1]) / 2) \ 412 copies--; \ 413 len += func(buf + len, size - len, \ 414 "[L%llu %s] %s %s %s %s %s %s%c" \ 415 "size=%llxL/%llxP birth=%lluL/%lluP fill=%llu%c" \ 416 "cksum=%llx:%llx:%llx:%llx", \ 417 (u_longlong_t)BP_GET_LEVEL(bp), \ 418 type, \ 419 checksum, \ 420 compress, \ 421 BP_GET_BYTEORDER(bp) == 0 ? "BE" : "LE", \ 422 BP_IS_GANG(bp) ? "gang" : "contiguous", \ 423 BP_GET_DEDUP(bp) ? "dedup" : "unique", \ 424 copyname[copies], \ 425 ws, \ 426 (u_longlong_t)BP_GET_LSIZE(bp), \ 427 (u_longlong_t)BP_GET_PSIZE(bp), \ 428 (u_longlong_t)bp->blk_birth, \ 429 (u_longlong_t)BP_PHYSICAL_BIRTH(bp), \ 430 (u_longlong_t)bp->blk_fill, \ 431 ws, \ 432 (u_longlong_t)bp->blk_cksum.zc_word[0], \ 433 (u_longlong_t)bp->blk_cksum.zc_word[1], \ 434 (u_longlong_t)bp->blk_cksum.zc_word[2], \ 435 (u_longlong_t)bp->blk_cksum.zc_word[3]); \ 436 } \ 437 ASSERT(len < size); \ 438} 439 440#include <sys/dmu.h> 441 442#define BP_GET_BUFC_TYPE(bp) \ 443 (((BP_GET_LEVEL(bp) > 0) || (DMU_OT_IS_METADATA(BP_GET_TYPE(bp)))) ? \ 444 ARC_BUFC_METADATA : ARC_BUFC_DATA) 445 446typedef enum spa_import_type { 447 SPA_IMPORT_EXISTING, 448 SPA_IMPORT_ASSEMBLE 449} spa_import_type_t; 450 451/* state manipulation functions */ 452extern int spa_open(const char *pool, spa_t **, void *tag); 453extern int spa_open_rewind(const char *pool, spa_t **, void *tag, 454 nvlist_t *policy, nvlist_t **config); 455extern int spa_get_stats(const char *pool, nvlist_t **config, char *altroot, 456 size_t buflen); 457extern int spa_create(const char *pool, nvlist_t *config, nvlist_t *props, 458 nvlist_t *zplprops); 459#if defined(sun) 460extern int spa_import_rootpool(char *devpath, char *devid); 461#else 462extern int spa_import_rootpool(const char *name); 463#endif 464extern int spa_import(const char *pool, nvlist_t *config, nvlist_t *props, 465 uint64_t flags); 466extern nvlist_t *spa_tryimport(nvlist_t *tryconfig); 467extern int spa_destroy(char *pool); 468extern int spa_export(char *pool, nvlist_t **oldconfig, boolean_t force, 469 boolean_t hardforce); 470extern int spa_reset(char *pool); 471extern void spa_async_request(spa_t *spa, int flag); 472extern void spa_async_unrequest(spa_t *spa, int flag); 473extern void spa_async_suspend(spa_t *spa); 474extern void spa_async_resume(spa_t *spa); 475extern spa_t *spa_inject_addref(char *pool); 476extern void spa_inject_delref(spa_t *spa); 477extern void spa_scan_stat_init(spa_t *spa); 478extern int spa_scan_get_stats(spa_t *spa, pool_scan_stat_t *ps); 479 480#define SPA_ASYNC_CONFIG_UPDATE 0x01 481#define SPA_ASYNC_REMOVE 0x02 482#define SPA_ASYNC_PROBE 0x04 483#define SPA_ASYNC_RESILVER_DONE 0x08 484#define SPA_ASYNC_RESILVER 0x10 485#define SPA_ASYNC_AUTOEXPAND 0x20 486#define SPA_ASYNC_REMOVE_DONE 0x40 487#define SPA_ASYNC_REMOVE_STOP 0x80 488 489/* 490 * Controls the behavior of spa_vdev_remove(). 491 */ 492#define SPA_REMOVE_UNSPARE 0x01 493#define SPA_REMOVE_DONE 0x02 494 495/* device manipulation */ 496extern int spa_vdev_add(spa_t *spa, nvlist_t *nvroot); 497extern int spa_vdev_attach(spa_t *spa, uint64_t guid, nvlist_t *nvroot, 498 int replacing); 499extern int spa_vdev_detach(spa_t *spa, uint64_t guid, uint64_t pguid, 500 int replace_done); 501extern int spa_vdev_remove(spa_t *spa, uint64_t guid, boolean_t unspare); 502extern boolean_t spa_vdev_remove_active(spa_t *spa); 503extern int spa_vdev_setpath(spa_t *spa, uint64_t guid, const char *newpath); 504extern int spa_vdev_setfru(spa_t *spa, uint64_t guid, const char *newfru); 505extern int spa_vdev_split_mirror(spa_t *spa, char *newname, nvlist_t *config, 506 nvlist_t *props, boolean_t exp); 507 508/* spare state (which is global across all pools) */ 509extern void spa_spare_add(vdev_t *vd); 510extern void spa_spare_remove(vdev_t *vd); 511extern boolean_t spa_spare_exists(uint64_t guid, uint64_t *pool, int *refcnt); 512extern void spa_spare_activate(vdev_t *vd); 513 514/* L2ARC state (which is global across all pools) */ 515extern void spa_l2cache_add(vdev_t *vd); 516extern void spa_l2cache_remove(vdev_t *vd); 517extern boolean_t spa_l2cache_exists(uint64_t guid, uint64_t *pool); 518extern void spa_l2cache_activate(vdev_t *vd); 519extern void spa_l2cache_drop(spa_t *spa); 520 521/* scanning */ 522extern int spa_scan(spa_t *spa, pool_scan_func_t func); 523extern int spa_scan_stop(spa_t *spa); 524 525/* spa syncing */ 526extern void spa_sync(spa_t *spa, uint64_t txg); /* only for DMU use */ 527extern void spa_sync_allpools(void); 528 529/* spa namespace global mutex */ 530extern kmutex_t spa_namespace_lock; 531 532/* 533 * SPA configuration functions in spa_config.c 534 */ 535 536#define SPA_CONFIG_UPDATE_POOL 0 537#define SPA_CONFIG_UPDATE_VDEVS 1 538 539extern void spa_config_sync(spa_t *, boolean_t, boolean_t); 540extern void spa_config_load(void); 541extern nvlist_t *spa_all_configs(uint64_t *); 542extern void spa_config_set(spa_t *spa, nvlist_t *config); 543extern nvlist_t *spa_config_generate(spa_t *spa, vdev_t *vd, uint64_t txg, 544 int getstats); 545extern void spa_config_update(spa_t *spa, int what); 546 547/* 548 * Miscellaneous SPA routines in spa_misc.c 549 */ 550 551/* Namespace manipulation */ 552extern spa_t *spa_lookup(const char *name); 553extern spa_t *spa_add(const char *name, nvlist_t *config, const char *altroot); 554extern void spa_remove(spa_t *spa); 555extern spa_t *spa_next(spa_t *prev); 556 557/* Refcount functions */ 558extern void spa_open_ref(spa_t *spa, void *tag); 559extern void spa_close(spa_t *spa, void *tag); 560extern boolean_t spa_refcount_zero(spa_t *spa); 561 562#define SCL_NONE 0x00 563#define SCL_CONFIG 0x01 564#define SCL_STATE 0x02 565#define SCL_L2ARC 0x04 /* hack until L2ARC 2.0 */ 566#define SCL_ALLOC 0x08 567#define SCL_ZIO 0x10 568#define SCL_FREE 0x20 569#define SCL_VDEV 0x40 570#define SCL_LOCKS 7 571#define SCL_ALL ((1 << SCL_LOCKS) - 1) 572#define SCL_STATE_ALL (SCL_STATE | SCL_L2ARC | SCL_ZIO) 573 574/* Pool configuration locks */ 575extern int spa_config_tryenter(spa_t *spa, int locks, void *tag, krw_t rw); 576extern void spa_config_enter(spa_t *spa, int locks, void *tag, krw_t rw); 577extern void spa_config_exit(spa_t *spa, int locks, void *tag); 578extern int spa_config_held(spa_t *spa, int locks, krw_t rw); 579 580/* Pool vdev add/remove lock */ 581extern uint64_t spa_vdev_enter(spa_t *spa); 582extern uint64_t spa_vdev_config_enter(spa_t *spa); 583extern void spa_vdev_config_exit(spa_t *spa, vdev_t *vd, uint64_t txg, 584 int error, char *tag); 585extern int spa_vdev_exit(spa_t *spa, vdev_t *vd, uint64_t txg, int error); 586 587/* Pool vdev state change lock */ 588extern void spa_vdev_state_enter(spa_t *spa, int oplock); 589extern int spa_vdev_state_exit(spa_t *spa, vdev_t *vd, int error); 590 591/* Log state */ 592typedef enum spa_log_state { 593 SPA_LOG_UNKNOWN = 0, /* unknown log state */ 594 SPA_LOG_MISSING, /* missing log(s) */ 595 SPA_LOG_CLEAR, /* clear the log(s) */ 596 SPA_LOG_GOOD, /* log(s) are good */ 597} spa_log_state_t; 598 599extern spa_log_state_t spa_get_log_state(spa_t *spa); 600extern void spa_set_log_state(spa_t *spa, spa_log_state_t state); 601extern int spa_offline_log(spa_t *spa); 602 603/* Log claim callback */ 604extern void spa_claim_notify(zio_t *zio); 605 606/* Accessor functions */ 607extern boolean_t spa_shutting_down(spa_t *spa); 608extern struct dsl_pool *spa_get_dsl(spa_t *spa); 609extern boolean_t spa_is_initializing(spa_t *spa); 610extern blkptr_t *spa_get_rootblkptr(spa_t *spa); 611extern void spa_set_rootblkptr(spa_t *spa, const blkptr_t *bp); 612extern void spa_altroot(spa_t *, char *, size_t); 613extern int spa_sync_pass(spa_t *spa); 614extern char *spa_name(spa_t *spa); 615extern uint64_t spa_guid(spa_t *spa); 616extern uint64_t spa_load_guid(spa_t *spa); 617extern uint64_t spa_last_synced_txg(spa_t *spa); 618extern uint64_t spa_first_txg(spa_t *spa); 619extern uint64_t spa_syncing_txg(spa_t *spa); 620extern uint64_t spa_version(spa_t *spa); 621extern pool_state_t spa_state(spa_t *spa); 622extern spa_load_state_t spa_load_state(spa_t *spa); 623extern uint64_t spa_freeze_txg(spa_t *spa); 624extern uint64_t spa_get_asize(spa_t *spa, uint64_t lsize); 625extern uint64_t spa_get_dspace(spa_t *spa); 626extern void spa_update_dspace(spa_t *spa); 627extern uint64_t spa_version(spa_t *spa); 628extern boolean_t spa_deflate(spa_t *spa); 629extern metaslab_class_t *spa_normal_class(spa_t *spa); 630extern metaslab_class_t *spa_log_class(spa_t *spa); 631extern int spa_max_replication(spa_t *spa); 632extern int spa_prev_software_version(spa_t *spa); 633extern int spa_busy(void); 634extern uint8_t spa_get_failmode(spa_t *spa); 635extern boolean_t spa_suspended(spa_t *spa); 636extern uint64_t spa_bootfs(spa_t *spa); 637extern uint64_t spa_delegation(spa_t *spa); 638extern objset_t *spa_meta_objset(spa_t *spa); 639extern uint64_t spa_deadman_synctime(spa_t *spa); 640 641/* Miscellaneous support routines */ 642extern void spa_activate_mos_feature(spa_t *spa, const char *feature, 643 dmu_tx_t *tx); 644extern void spa_deactivate_mos_feature(spa_t *spa, const char *feature); 645extern int spa_rename(const char *oldname, const char *newname); 646extern spa_t *spa_by_guid(uint64_t pool_guid, uint64_t device_guid); 647extern boolean_t spa_guid_exists(uint64_t pool_guid, uint64_t device_guid); 648extern char *spa_strdup(const char *); 649extern void spa_strfree(char *); 650extern uint64_t spa_get_random(uint64_t range); 651extern uint64_t spa_generate_guid(spa_t *spa); 652extern void snprintf_blkptr(char *buf, size_t buflen, const blkptr_t *bp); 653extern void spa_freeze(spa_t *spa); 654extern int spa_change_guid(spa_t *spa); 655extern void spa_upgrade(spa_t *spa, uint64_t version); 656extern void spa_evict_all(void); 657extern vdev_t *spa_lookup_by_guid(spa_t *spa, uint64_t guid, 658 boolean_t l2cache); 659extern boolean_t spa_has_spare(spa_t *, uint64_t guid); 660extern uint64_t dva_get_dsize_sync(spa_t *spa, const dva_t *dva); 661extern uint64_t bp_get_dsize_sync(spa_t *spa, const blkptr_t *bp); 662extern uint64_t bp_get_dsize(spa_t *spa, const blkptr_t *bp); 663extern boolean_t spa_has_slogs(spa_t *spa); 664extern boolean_t spa_is_root(spa_t *spa); 665extern boolean_t spa_writeable(spa_t *spa); 666 667extern int spa_mode(spa_t *spa); 668extern uint64_t zfs_strtonum(const char *str, char **nptr); 669#define strtonum(str, nptr) zfs_strtonum((str), (nptr)) 670 671extern char *spa_his_ievent_table[]; 672 673extern void spa_history_create_obj(spa_t *spa, dmu_tx_t *tx); 674extern int spa_history_get(spa_t *spa, uint64_t *offset, uint64_t *len_read, 675 char *his_buf); 676extern int spa_history_log(spa_t *spa, const char *his_buf); 677extern int spa_history_log_nvl(spa_t *spa, nvlist_t *nvl); 678extern void spa_history_log_version(spa_t *spa, const char *operation); 679extern void spa_history_log_internal(spa_t *spa, const char *operation, 680 dmu_tx_t *tx, const char *fmt, ...); 681extern void spa_history_log_internal_ds(struct dsl_dataset *ds, const char *op, 682 dmu_tx_t *tx, const char *fmt, ...); 683extern void spa_history_log_internal_dd(dsl_dir_t *dd, const char *operation, 684 dmu_tx_t *tx, const char *fmt, ...); 685 686/* error handling */ 687struct zbookmark; 688extern void spa_log_error(spa_t *spa, zio_t *zio); 689extern void zfs_ereport_post(const char *cls, spa_t *spa, vdev_t *vd, 690 zio_t *zio, uint64_t stateoroffset, uint64_t length); 691extern void zfs_post_remove(spa_t *spa, vdev_t *vd); 692extern void zfs_post_state_change(spa_t *spa, vdev_t *vd); 693extern void zfs_post_autoreplace(spa_t *spa, vdev_t *vd); 694extern uint64_t spa_get_errlog_size(spa_t *spa); 695extern int spa_get_errlog(spa_t *spa, void *uaddr, size_t *count); 696extern void spa_errlog_rotate(spa_t *spa); 697extern void spa_errlog_drain(spa_t *spa); 698extern void spa_errlog_sync(spa_t *spa, uint64_t txg); 699extern void spa_get_errlists(spa_t *spa, avl_tree_t *last, avl_tree_t *scrub); 700 701/* vdev cache */ 702extern void vdev_cache_stat_init(void); 703extern void vdev_cache_stat_fini(void); 704 705/* Initialization and termination */ 706extern void spa_init(int flags); 707extern void spa_fini(void); 708extern void spa_boot_init(); 709 710/* properties */ 711extern int spa_prop_set(spa_t *spa, nvlist_t *nvp); 712extern int spa_prop_get(spa_t *spa, nvlist_t **nvp); 713extern void spa_prop_clear_bootfs(spa_t *spa, uint64_t obj, dmu_tx_t *tx); 714extern void spa_configfile_set(spa_t *, nvlist_t *, boolean_t); 715 716/* asynchronous event notification */ 717extern void spa_event_notify(spa_t *spa, vdev_t *vdev, const char *name); 718 719#ifdef ZFS_DEBUG 720#define dprintf_bp(bp, fmt, ...) do { \ 721 if (zfs_flags & ZFS_DEBUG_DPRINTF) { \ 722 char *__blkbuf = kmem_alloc(BP_SPRINTF_LEN, KM_SLEEP); \ 723 snprintf_blkptr(__blkbuf, BP_SPRINTF_LEN, (bp)); \ 724 dprintf(fmt " %s\n", __VA_ARGS__, __blkbuf); \ 725 kmem_free(__blkbuf, BP_SPRINTF_LEN); \ 726 } \ 727_NOTE(CONSTCOND) } while (0) 728#else 729#define dprintf_bp(bp, fmt, ...) 730#endif 731 732extern boolean_t spa_debug_enabled(spa_t *spa); 733#define spa_dbgmsg(spa, ...) \ 734{ \ 735 if (spa_debug_enabled(spa)) \ 736 zfs_dbgmsg(__VA_ARGS__); \ 737} 738 739extern int spa_mode_global; /* mode, e.g. FREAD | FWRITE */ 740 741#ifdef __cplusplus 742} 743#endif 744 745#endif /* _SYS_SPA_H */ 746