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 2008 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #ifndef _SYS_SPA_H 27 #define _SYS_SPA_H 28 29 #pragma ident "%Z%%M% %I% %E% SMI" 30 31 #include <sys/avl.h> 32 #include <sys/zfs_context.h> 33 #include <sys/nvpair.h> 34 #include <sys/sysmacros.h> 35 #include <sys/types.h> 36 #include <sys/fs/zfs.h> 37 38 #ifdef __cplusplus 39 extern "C" { 40 #endif 41 42 /* 43 * Forward references that lots of things need. 44 */ 45 typedef struct spa spa_t; 46 typedef struct vdev vdev_t; 47 typedef struct metaslab metaslab_t; 48 typedef struct zilog zilog_t; 49 typedef struct traverse_handle traverse_handle_t; 50 typedef struct spa_aux_vdev spa_aux_vdev_t; 51 struct dsl_pool; 52 53 /* 54 * General-purpose 32-bit and 64-bit bitfield encodings. 55 */ 56 #define BF32_DECODE(x, low, len) P2PHASE((x) >> (low), 1U << (len)) 57 #define BF64_DECODE(x, low, len) P2PHASE((x) >> (low), 1ULL << (len)) 58 #define BF32_ENCODE(x, low, len) (P2PHASE((x), 1U << (len)) << (low)) 59 #define BF64_ENCODE(x, low, len) (P2PHASE((x), 1ULL << (len)) << (low)) 60 61 #define BF32_GET(x, low, len) BF32_DECODE(x, low, len) 62 #define BF64_GET(x, low, len) BF64_DECODE(x, low, len) 63 64 #define BF32_SET(x, low, len, val) \ 65 ((x) ^= BF32_ENCODE((x >> low) ^ (val), low, len)) 66 #define BF64_SET(x, low, len, val) \ 67 ((x) ^= BF64_ENCODE((x >> low) ^ (val), low, len)) 68 69 #define BF32_GET_SB(x, low, len, shift, bias) \ 70 ((BF32_GET(x, low, len) + (bias)) << (shift)) 71 #define BF64_GET_SB(x, low, len, shift, bias) \ 72 ((BF64_GET(x, low, len) + (bias)) << (shift)) 73 74 #define BF32_SET_SB(x, low, len, shift, bias, val) \ 75 BF32_SET(x, low, len, ((val) >> (shift)) - (bias)) 76 #define BF64_SET_SB(x, low, len, shift, bias, val) \ 77 BF64_SET(x, low, len, ((val) >> (shift)) - (bias)) 78 79 /* 80 * We currently support nine block sizes, from 512 bytes to 128K. 81 * We could go higher, but the benefits are near-zero and the cost 82 * of COWing a giant block to modify one byte would become excessive. 83 */ 84 #define SPA_MINBLOCKSHIFT 9 85 #define SPA_MAXBLOCKSHIFT 17 86 #define SPA_MINBLOCKSIZE (1ULL << SPA_MINBLOCKSHIFT) 87 #define SPA_MAXBLOCKSIZE (1ULL << SPA_MAXBLOCKSHIFT) 88 89 #define SPA_BLOCKSIZES (SPA_MAXBLOCKSHIFT - SPA_MINBLOCKSHIFT + 1) 90 91 /* 92 * The DVA size encodings for LSIZE and PSIZE support blocks up to 32MB. 93 * The ASIZE encoding should be at least 64 times larger (6 more bits) 94 * to support up to 4-way RAID-Z mirror mode with worst-case gang block 95 * overhead, three DVAs per bp, plus one more bit in case we do anything 96 * else that expands the ASIZE. 97 */ 98 #define SPA_LSIZEBITS 16 /* LSIZE up to 32M (2^16 * 512) */ 99 #define SPA_PSIZEBITS 16 /* PSIZE up to 32M (2^16 * 512) */ 100 #define SPA_ASIZEBITS 24 /* ASIZE up to 64 times larger */ 101 102 /* 103 * All SPA data is represented by 128-bit data virtual addresses (DVAs). 104 * The members of the dva_t should be considered opaque outside the SPA. 105 */ 106 typedef struct dva { 107 uint64_t dva_word[2]; 108 } dva_t; 109 110 /* 111 * Each block has a 256-bit checksum -- strong enough for cryptographic hashes. 112 */ 113 typedef struct zio_cksum { 114 uint64_t zc_word[4]; 115 } zio_cksum_t; 116 117 /* 118 * Each block is described by its DVAs, time of birth, checksum, etc. 119 * The word-by-word, bit-by-bit layout of the blkptr is as follows: 120 * 121 * 64 56 48 40 32 24 16 8 0 122 * +-------+-------+-------+-------+-------+-------+-------+-------+ 123 * 0 | vdev1 | GRID | ASIZE | 124 * +-------+-------+-------+-------+-------+-------+-------+-------+ 125 * 1 |G| offset1 | 126 * +-------+-------+-------+-------+-------+-------+-------+-------+ 127 * 2 | vdev2 | GRID | ASIZE | 128 * +-------+-------+-------+-------+-------+-------+-------+-------+ 129 * 3 |G| offset2 | 130 * +-------+-------+-------+-------+-------+-------+-------+-------+ 131 * 4 | vdev3 | GRID | ASIZE | 132 * +-------+-------+-------+-------+-------+-------+-------+-------+ 133 * 5 |G| offset3 | 134 * +-------+-------+-------+-------+-------+-------+-------+-------+ 135 * 6 |E| lvl | type | cksum | comp | PSIZE | LSIZE | 136 * +-------+-------+-------+-------+-------+-------+-------+-------+ 137 * 7 | padding | 138 * +-------+-------+-------+-------+-------+-------+-------+-------+ 139 * 8 | padding | 140 * +-------+-------+-------+-------+-------+-------+-------+-------+ 141 * 9 | padding | 142 * +-------+-------+-------+-------+-------+-------+-------+-------+ 143 * a | birth txg | 144 * +-------+-------+-------+-------+-------+-------+-------+-------+ 145 * b | fill count | 146 * +-------+-------+-------+-------+-------+-------+-------+-------+ 147 * c | checksum[0] | 148 * +-------+-------+-------+-------+-------+-------+-------+-------+ 149 * d | checksum[1] | 150 * +-------+-------+-------+-------+-------+-------+-------+-------+ 151 * e | checksum[2] | 152 * +-------+-------+-------+-------+-------+-------+-------+-------+ 153 * f | checksum[3] | 154 * +-------+-------+-------+-------+-------+-------+-------+-------+ 155 * 156 * Legend: 157 * 158 * vdev virtual device ID 159 * offset offset into virtual device 160 * LSIZE logical size 161 * PSIZE physical size (after compression) 162 * ASIZE allocated size (including RAID-Z parity and gang block headers) 163 * GRID RAID-Z layout information (reserved for future use) 164 * cksum checksum function 165 * comp compression function 166 * G gang block indicator 167 * E endianness 168 * type DMU object type 169 * lvl level of indirection 170 * birth txg transaction group in which the block was born 171 * fill count number of non-zero blocks under this bp 172 * checksum[4] 256-bit checksum of the data this bp describes 173 */ 174 typedef struct blkptr { 175 dva_t blk_dva[3]; /* 128-bit Data Virtual Address */ 176 uint64_t blk_prop; /* size, compression, type, etc */ 177 uint64_t blk_pad[3]; /* Extra space for the future */ 178 uint64_t blk_birth; /* transaction group at birth */ 179 uint64_t blk_fill; /* fill count */ 180 zio_cksum_t blk_cksum; /* 256-bit checksum */ 181 } blkptr_t; 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 /* 187 * Macros to get and set fields in a bp or DVA. 188 */ 189 #define DVA_GET_ASIZE(dva) \ 190 BF64_GET_SB((dva)->dva_word[0], 0, 24, SPA_MINBLOCKSHIFT, 0) 191 #define DVA_SET_ASIZE(dva, x) \ 192 BF64_SET_SB((dva)->dva_word[0], 0, 24, SPA_MINBLOCKSHIFT, 0, x) 193 194 #define DVA_GET_GRID(dva) BF64_GET((dva)->dva_word[0], 24, 8) 195 #define DVA_SET_GRID(dva, x) BF64_SET((dva)->dva_word[0], 24, 8, x) 196 197 #define DVA_GET_VDEV(dva) BF64_GET((dva)->dva_word[0], 32, 32) 198 #define DVA_SET_VDEV(dva, x) BF64_SET((dva)->dva_word[0], 32, 32, x) 199 200 #define DVA_GET_OFFSET(dva) \ 201 BF64_GET_SB((dva)->dva_word[1], 0, 63, SPA_MINBLOCKSHIFT, 0) 202 #define DVA_SET_OFFSET(dva, x) \ 203 BF64_SET_SB((dva)->dva_word[1], 0, 63, SPA_MINBLOCKSHIFT, 0, x) 204 205 #define DVA_GET_GANG(dva) BF64_GET((dva)->dva_word[1], 63, 1) 206 #define DVA_SET_GANG(dva, x) BF64_SET((dva)->dva_word[1], 63, 1, x) 207 208 #define BP_GET_LSIZE(bp) \ 209 (BP_IS_HOLE(bp) ? 0 : \ 210 BF64_GET_SB((bp)->blk_prop, 0, 16, SPA_MINBLOCKSHIFT, 1)) 211 #define BP_SET_LSIZE(bp, x) \ 212 BF64_SET_SB((bp)->blk_prop, 0, 16, SPA_MINBLOCKSHIFT, 1, x) 213 214 #define BP_GET_PSIZE(bp) \ 215 BF64_GET_SB((bp)->blk_prop, 16, 16, SPA_MINBLOCKSHIFT, 1) 216 #define BP_SET_PSIZE(bp, x) \ 217 BF64_SET_SB((bp)->blk_prop, 16, 16, SPA_MINBLOCKSHIFT, 1, x) 218 219 #define BP_GET_COMPRESS(bp) BF64_GET((bp)->blk_prop, 32, 8) 220 #define BP_SET_COMPRESS(bp, x) BF64_SET((bp)->blk_prop, 32, 8, x) 221 222 #define BP_GET_CHECKSUM(bp) BF64_GET((bp)->blk_prop, 40, 8) 223 #define BP_SET_CHECKSUM(bp, x) BF64_SET((bp)->blk_prop, 40, 8, x) 224 225 #define BP_GET_TYPE(bp) BF64_GET((bp)->blk_prop, 48, 8) 226 #define BP_SET_TYPE(bp, x) BF64_SET((bp)->blk_prop, 48, 8, x) 227 228 #define BP_GET_LEVEL(bp) BF64_GET((bp)->blk_prop, 56, 5) 229 #define BP_SET_LEVEL(bp, x) BF64_SET((bp)->blk_prop, 56, 5, x) 230 231 #define BP_GET_BYTEORDER(bp) (0 - BF64_GET((bp)->blk_prop, 63, 1)) 232 #define BP_SET_BYTEORDER(bp, x) BF64_SET((bp)->blk_prop, 63, 1, x) 233 234 #define BP_GET_ASIZE(bp) \ 235 (DVA_GET_ASIZE(&(bp)->blk_dva[0]) + DVA_GET_ASIZE(&(bp)->blk_dva[1]) + \ 236 DVA_GET_ASIZE(&(bp)->blk_dva[2])) 237 238 #define BP_GET_UCSIZE(bp) \ 239 ((BP_GET_LEVEL(bp) > 0 || dmu_ot[BP_GET_TYPE(bp)].ot_metadata) ? \ 240 BP_GET_PSIZE(bp) : BP_GET_LSIZE(bp)); 241 242 #define BP_GET_NDVAS(bp) \ 243 (!!DVA_GET_ASIZE(&(bp)->blk_dva[0]) + \ 244 !!DVA_GET_ASIZE(&(bp)->blk_dva[1]) + \ 245 !!DVA_GET_ASIZE(&(bp)->blk_dva[2])) 246 247 #define BP_COUNT_GANG(bp) \ 248 (DVA_GET_GANG(&(bp)->blk_dva[0]) + \ 249 DVA_GET_GANG(&(bp)->blk_dva[1]) + \ 250 DVA_GET_GANG(&(bp)->blk_dva[2])) 251 252 #define DVA_EQUAL(dva1, dva2) \ 253 ((dva1)->dva_word[1] == (dva2)->dva_word[1] && \ 254 (dva1)->dva_word[0] == (dva2)->dva_word[0]) 255 256 #define ZIO_CHECKSUM_EQUAL(zc1, zc2) \ 257 (0 == (((zc1).zc_word[0] - (zc2).zc_word[0]) | \ 258 ((zc1).zc_word[1] - (zc2).zc_word[1]) | \ 259 ((zc1).zc_word[2] - (zc2).zc_word[2]) | \ 260 ((zc1).zc_word[3] - (zc2).zc_word[3]))) 261 262 263 #define DVA_IS_VALID(dva) (DVA_GET_ASIZE(dva) != 0) 264 265 #define ZIO_SET_CHECKSUM(zcp, w0, w1, w2, w3) \ 266 { \ 267 (zcp)->zc_word[0] = w0; \ 268 (zcp)->zc_word[1] = w1; \ 269 (zcp)->zc_word[2] = w2; \ 270 (zcp)->zc_word[3] = w3; \ 271 } 272 273 #define BP_IDENTITY(bp) (&(bp)->blk_dva[0]) 274 #define BP_IS_GANG(bp) DVA_GET_GANG(BP_IDENTITY(bp)) 275 #define BP_IS_HOLE(bp) ((bp)->blk_birth == 0) 276 #define BP_IS_OLDER(bp, txg) (!BP_IS_HOLE(bp) && (bp)->blk_birth < (txg)) 277 278 #define BP_ZERO_DVAS(bp) \ 279 { \ 280 (bp)->blk_dva[0].dva_word[0] = 0; \ 281 (bp)->blk_dva[0].dva_word[1] = 0; \ 282 (bp)->blk_dva[1].dva_word[0] = 0; \ 283 (bp)->blk_dva[1].dva_word[1] = 0; \ 284 (bp)->blk_dva[2].dva_word[0] = 0; \ 285 (bp)->blk_dva[2].dva_word[1] = 0; \ 286 (bp)->blk_birth = 0; \ 287 } 288 289 #define BP_ZERO(bp) \ 290 { \ 291 BP_ZERO_DVAS(bp) \ 292 (bp)->blk_prop = 0; \ 293 (bp)->blk_pad[0] = 0; \ 294 (bp)->blk_pad[1] = 0; \ 295 (bp)->blk_pad[2] = 0; \ 296 (bp)->blk_fill = 0; \ 297 ZIO_SET_CHECKSUM(&(bp)->blk_cksum, 0, 0, 0, 0); \ 298 } 299 300 /* 301 * Note: the byteorder is either 0 or -1, both of which are palindromes. 302 * This simplifies the endianness handling a bit. 303 */ 304 #ifdef _BIG_ENDIAN 305 #define ZFS_HOST_BYTEORDER (0ULL) 306 #else 307 #define ZFS_HOST_BYTEORDER (-1ULL) 308 #endif 309 310 #define BP_SHOULD_BYTESWAP(bp) (BP_GET_BYTEORDER(bp) != ZFS_HOST_BYTEORDER) 311 312 #define BP_SPRINTF_LEN 320 313 314 #include <sys/dmu.h> 315 316 #define BP_GET_BUFC_TYPE(bp) \ 317 (((BP_GET_LEVEL(bp) > 0) || (dmu_ot[BP_GET_TYPE(bp)].ot_metadata)) ? \ 318 ARC_BUFC_METADATA : ARC_BUFC_DATA); 319 /* 320 * Routines found in spa.c 321 */ 322 323 /* state manipulation functions */ 324 extern int spa_open(const char *pool, spa_t **, void *tag); 325 extern int spa_get_stats(const char *pool, nvlist_t **config, 326 char *altroot, size_t buflen); 327 extern int spa_create(const char *pool, nvlist_t *config, nvlist_t *props, 328 const char *history_str, nvlist_t *zplprops); 329 extern int spa_check_rootconf(char *devpath, char *devid, 330 nvlist_t **bestconf, uint64_t *besttxg); 331 extern boolean_t spa_rootdev_validate(nvlist_t *nv); 332 extern int spa_import_rootpool(char *devpath, char *devid); 333 extern int spa_import(const char *pool, nvlist_t *config, nvlist_t *props); 334 extern int spa_import_faulted(const char *, nvlist_t *, nvlist_t *); 335 extern nvlist_t *spa_tryimport(nvlist_t *tryconfig); 336 extern int spa_destroy(char *pool); 337 extern int spa_export(char *pool, nvlist_t **oldconfig, boolean_t force); 338 extern int spa_reset(char *pool); 339 extern void spa_async_request(spa_t *spa, int flag); 340 extern void spa_async_unrequest(spa_t *spa, int flag); 341 extern void spa_async_suspend(spa_t *spa); 342 extern void spa_async_resume(spa_t *spa); 343 extern spa_t *spa_inject_addref(char *pool); 344 extern void spa_inject_delref(spa_t *spa); 345 346 #define SPA_ASYNC_REMOVE 0x01 347 #define SPA_ASYNC_RESILVER_DONE 0x02 348 #define SPA_ASYNC_RESILVER 0x08 349 #define SPA_ASYNC_CONFIG_UPDATE 0x10 350 351 /* device manipulation */ 352 extern int spa_vdev_add(spa_t *spa, nvlist_t *nvroot); 353 extern int spa_vdev_attach(spa_t *spa, uint64_t guid, nvlist_t *nvroot, 354 int replacing); 355 extern int spa_vdev_detach(spa_t *spa, uint64_t guid, int replace_done); 356 extern int spa_vdev_remove(spa_t *spa, uint64_t guid, boolean_t unspare); 357 extern int spa_vdev_setpath(spa_t *spa, uint64_t guid, const char *newpath); 358 359 /* spare state (which is global across all pools) */ 360 extern void spa_spare_add(vdev_t *vd); 361 extern void spa_spare_remove(vdev_t *vd); 362 extern boolean_t spa_spare_exists(uint64_t guid, uint64_t *pool, int *refcnt); 363 extern void spa_spare_activate(vdev_t *vd); 364 365 /* L2ARC state (which is global across all pools) */ 366 extern void spa_l2cache_add(vdev_t *vd); 367 extern void spa_l2cache_remove(vdev_t *vd); 368 extern boolean_t spa_l2cache_exists(uint64_t guid, uint64_t *pool); 369 extern void spa_l2cache_activate(vdev_t *vd); 370 extern void spa_l2cache_drop(spa_t *spa); 371 extern void spa_l2cache_space_update(vdev_t *vd, int64_t space, int64_t alloc); 372 373 /* scrubbing */ 374 extern int spa_scrub(spa_t *spa, pool_scrub_type_t type); 375 376 /* spa syncing */ 377 extern void spa_sync(spa_t *spa, uint64_t txg); /* only for DMU use */ 378 extern void spa_sync_allpools(void); 379 380 /* spa namespace global mutex */ 381 extern kmutex_t spa_namespace_lock; 382 383 /* 384 * SPA configuration functions in spa_config.c 385 */ 386 387 #define SPA_CONFIG_UPDATE_POOL 0 388 #define SPA_CONFIG_UPDATE_VDEVS 1 389 390 extern void spa_config_sync(spa_t *, boolean_t, boolean_t); 391 extern void spa_config_load(void); 392 extern nvlist_t *spa_all_configs(uint64_t *); 393 extern void spa_config_set(spa_t *spa, nvlist_t *config); 394 extern nvlist_t *spa_config_generate(spa_t *spa, vdev_t *vd, uint64_t txg, 395 int getstats); 396 extern void spa_config_update(spa_t *spa, int what); 397 extern void spa_config_update_common(spa_t *spa, int what, boolean_t isroot); 398 399 /* 400 * Miscellaneous SPA routines in spa_misc.c 401 */ 402 403 /* Namespace manipulation */ 404 extern spa_t *spa_lookup(const char *name); 405 extern spa_t *spa_add(const char *name, const char *altroot); 406 extern void spa_remove(spa_t *spa); 407 extern spa_t *spa_next(spa_t *prev); 408 409 /* Refcount functions */ 410 extern void spa_open_ref(spa_t *spa, void *tag); 411 extern void spa_close(spa_t *spa, void *tag); 412 extern boolean_t spa_refcount_zero(spa_t *spa); 413 414 /* Pool configuration lock */ 415 extern void spa_config_enter(spa_t *spa, krw_t rw, void *tag); 416 extern void spa_config_exit(spa_t *spa, void *tag); 417 extern boolean_t spa_config_held(spa_t *spa, krw_t rw); 418 419 /* Pool vdev add/remove lock */ 420 extern uint64_t spa_vdev_enter(spa_t *spa); 421 extern int spa_vdev_exit(spa_t *spa, vdev_t *vd, uint64_t txg, int error); 422 423 /* Accessor functions */ 424 extern krwlock_t *spa_traverse_rwlock(spa_t *spa); 425 extern boolean_t spa_traverse_wanted(spa_t *spa); 426 extern struct dsl_pool *spa_get_dsl(spa_t *spa); 427 extern blkptr_t *spa_get_rootblkptr(spa_t *spa); 428 extern void spa_set_rootblkptr(spa_t *spa, const blkptr_t *bp); 429 extern void spa_altroot(spa_t *, char *, size_t); 430 extern int spa_sync_pass(spa_t *spa); 431 extern char *spa_name(spa_t *spa); 432 extern uint64_t spa_guid(spa_t *spa); 433 extern uint64_t spa_last_synced_txg(spa_t *spa); 434 extern uint64_t spa_first_txg(spa_t *spa); 435 extern uint64_t spa_version(spa_t *spa); 436 extern int spa_state(spa_t *spa); 437 extern uint64_t spa_freeze_txg(spa_t *spa); 438 extern uint64_t spa_get_alloc(spa_t *spa); 439 extern uint64_t spa_get_space(spa_t *spa); 440 extern uint64_t spa_get_dspace(spa_t *spa); 441 extern uint64_t spa_get_asize(spa_t *spa, uint64_t lsize); 442 extern uint64_t spa_version(spa_t *spa); 443 extern int spa_max_replication(spa_t *spa); 444 extern int spa_busy(void); 445 extern uint8_t spa_get_failmode(spa_t *spa); 446 447 /* Miscellaneous support routines */ 448 extern int spa_rename(const char *oldname, const char *newname); 449 extern boolean_t spa_guid_exists(uint64_t pool_guid, uint64_t device_guid); 450 extern char *spa_strdup(const char *); 451 extern void spa_strfree(char *); 452 extern uint64_t spa_get_random(uint64_t range); 453 extern void sprintf_blkptr(char *buf, int len, const blkptr_t *bp); 454 extern void spa_freeze(spa_t *spa); 455 extern void spa_upgrade(spa_t *spa, uint64_t version); 456 extern void spa_evict_all(void); 457 extern vdev_t *spa_lookup_by_guid(spa_t *spa, uint64_t guid, 458 boolean_t l2cache); 459 extern boolean_t spa_has_spare(spa_t *, uint64_t guid); 460 extern uint64_t bp_get_dasize(spa_t *spa, const blkptr_t *bp); 461 extern boolean_t spa_has_slogs(spa_t *spa); 462 extern boolean_t spa_is_root(spa_t *spa); 463 464 /* history logging */ 465 typedef enum history_log_type { 466 LOG_CMD_POOL_CREATE, 467 LOG_CMD_NORMAL, 468 LOG_INTERNAL 469 } history_log_type_t; 470 471 typedef struct history_arg { 472 const char *ha_history_str; 473 history_log_type_t ha_log_type; 474 history_internal_events_t ha_event; 475 char ha_zone[MAXPATHLEN]; 476 } history_arg_t; 477 478 extern char *spa_his_ievent_table[]; 479 480 extern void spa_history_create_obj(spa_t *spa, dmu_tx_t *tx); 481 extern int spa_history_get(spa_t *spa, uint64_t *offset, uint64_t *len_read, 482 char *his_buf); 483 extern int spa_history_log(spa_t *spa, const char *his_buf, 484 history_log_type_t what); 485 void spa_history_internal_log(history_internal_events_t event, spa_t *spa, 486 dmu_tx_t *tx, cred_t *cr, const char *fmt, ...); 487 488 /* error handling */ 489 struct zbookmark; 490 struct zio; 491 extern void spa_log_error(spa_t *spa, struct zio *zio); 492 extern void zfs_ereport_post(const char *class, spa_t *spa, vdev_t *vd, 493 struct zio *zio, uint64_t stateoroffset, uint64_t length); 494 extern void zfs_post_remove(spa_t *spa, vdev_t *vd); 495 extern void zfs_post_autoreplace(spa_t *spa, vdev_t *vd); 496 extern uint64_t spa_get_errlog_size(spa_t *spa); 497 extern int spa_get_errlog(spa_t *spa, void *uaddr, size_t *count); 498 extern void spa_errlog_rotate(spa_t *spa); 499 extern void spa_errlog_drain(spa_t *spa); 500 extern void spa_errlog_sync(spa_t *spa, uint64_t txg); 501 extern void spa_get_errlists(spa_t *spa, avl_tree_t *last, avl_tree_t *scrub); 502 503 /* vdev cache */ 504 extern void vdev_cache_stat_init(void); 505 extern void vdev_cache_stat_fini(void); 506 507 /* Initialization and termination */ 508 extern void spa_init(int flags); 509 extern void spa_fini(void); 510 extern void spa_boot_init(); 511 512 /* properties */ 513 extern int spa_prop_set(spa_t *spa, nvlist_t *nvp); 514 extern int spa_prop_get(spa_t *spa, nvlist_t **nvp); 515 extern void spa_prop_clear_bootfs(spa_t *spa, uint64_t obj, dmu_tx_t *tx); 516 517 /* asynchronous event notification */ 518 extern void spa_event_notify(spa_t *spa, vdev_t *vdev, const char *name); 519 520 #ifdef ZFS_DEBUG 521 #define dprintf_bp(bp, fmt, ...) do { \ 522 if (zfs_flags & ZFS_DEBUG_DPRINTF) { \ 523 char *__blkbuf = kmem_alloc(BP_SPRINTF_LEN, KM_SLEEP); \ 524 sprintf_blkptr(__blkbuf, BP_SPRINTF_LEN, (bp)); \ 525 dprintf(fmt " %s\n", __VA_ARGS__, __blkbuf); \ 526 kmem_free(__blkbuf, BP_SPRINTF_LEN); \ 527 } \ 528 _NOTE(CONSTCOND) } while (0) 529 #else 530 #define dprintf_bp(bp, fmt, ...) 531 #endif 532 533 extern int spa_mode; /* mode, e.g. FREAD | FWRITE */ 534 535 #ifdef __cplusplus 536 } 537 #endif 538 539 #endif /* _SYS_SPA_H */ 540