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