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 #include <sys/avl.h> 30 #include <sys/zfs_context.h> 31 #include <sys/nvpair.h> 32 #include <sys/sysmacros.h> 33 #include <sys/types.h> 34 #include <sys/fs/zfs.h> 35 36 #ifdef __cplusplus 37 extern "C" { 38 #endif 39 40 /* 41 * Forward references that lots of things need. 42 */ 43 typedef struct spa spa_t; 44 typedef struct vdev vdev_t; 45 typedef struct metaslab metaslab_t; 46 typedef struct zilog zilog_t; 47 typedef struct traverse_handle traverse_handle_t; 48 typedef struct spa_aux_vdev spa_aux_vdev_t; 49 struct dsl_pool; 50 51 /* 52 * General-purpose 32-bit and 64-bit bitfield encodings. 53 */ 54 #define BF32_DECODE(x, low, len) P2PHASE((x) >> (low), 1U << (len)) 55 #define BF64_DECODE(x, low, len) P2PHASE((x) >> (low), 1ULL << (len)) 56 #define BF32_ENCODE(x, low, len) (P2PHASE((x), 1U << (len)) << (low)) 57 #define BF64_ENCODE(x, low, len) (P2PHASE((x), 1ULL << (len)) << (low)) 58 59 #define BF32_GET(x, low, len) BF32_DECODE(x, low, len) 60 #define BF64_GET(x, low, len) BF64_DECODE(x, low, len) 61 62 #define BF32_SET(x, low, len, val) \ 63 ((x) ^= BF32_ENCODE((x >> low) ^ (val), low, len)) 64 #define BF64_SET(x, low, len, val) \ 65 ((x) ^= BF64_ENCODE((x >> low) ^ (val), low, len)) 66 67 #define BF32_GET_SB(x, low, len, shift, bias) \ 68 ((BF32_GET(x, low, len) + (bias)) << (shift)) 69 #define BF64_GET_SB(x, low, len, shift, bias) \ 70 ((BF64_GET(x, low, len) + (bias)) << (shift)) 71 72 #define BF32_SET_SB(x, low, len, shift, bias, val) \ 73 BF32_SET(x, low, len, ((val) >> (shift)) - (bias)) 74 #define BF64_SET_SB(x, low, len, shift, bias, val) \ 75 BF64_SET(x, low, len, ((val) >> (shift)) - (bias)) 76 77 /* 78 * We currently support nine block sizes, from 512 bytes to 128K. 79 * We could go higher, but the benefits are near-zero and the cost 80 * of COWing a giant block to modify one byte would become excessive. 81 */ 82 #define SPA_MINBLOCKSHIFT 9 83 #define SPA_MAXBLOCKSHIFT 17 84 #define SPA_MINBLOCKSIZE (1ULL << SPA_MINBLOCKSHIFT) 85 #define SPA_MAXBLOCKSIZE (1ULL << SPA_MAXBLOCKSHIFT) 86 87 #define SPA_BLOCKSIZES (SPA_MAXBLOCKSHIFT - SPA_MINBLOCKSHIFT + 1) 88 89 /* 90 * Size of block to hold the configuration data (a packed nvlist) 91 */ 92 #define SPA_CONFIG_BLOCKSIZE (1 << 14) 93 94 /* 95 * The DVA size encodings for LSIZE and PSIZE support blocks up to 32MB. 96 * The ASIZE encoding should be at least 64 times larger (6 more bits) 97 * to support up to 4-way RAID-Z mirror mode with worst-case gang block 98 * overhead, three DVAs per bp, plus one more bit in case we do anything 99 * else that expands the ASIZE. 100 */ 101 #define SPA_LSIZEBITS 16 /* LSIZE up to 32M (2^16 * 512) */ 102 #define SPA_PSIZEBITS 16 /* PSIZE up to 32M (2^16 * 512) */ 103 #define SPA_ASIZEBITS 24 /* ASIZE up to 64 times larger */ 104 105 /* 106 * All SPA data is represented by 128-bit data virtual addresses (DVAs). 107 * The members of the dva_t should be considered opaque outside the SPA. 108 */ 109 typedef struct dva { 110 uint64_t dva_word[2]; 111 } dva_t; 112 113 /* 114 * Each block has a 256-bit checksum -- strong enough for cryptographic hashes. 115 */ 116 typedef struct zio_cksum { 117 uint64_t zc_word[4]; 118 } zio_cksum_t; 119 120 /* 121 * Each block is described by its DVAs, time of birth, checksum, etc. 122 * The word-by-word, bit-by-bit layout of the blkptr is as follows: 123 * 124 * 64 56 48 40 32 24 16 8 0 125 * +-------+-------+-------+-------+-------+-------+-------+-------+ 126 * 0 | vdev1 | GRID | ASIZE | 127 * +-------+-------+-------+-------+-------+-------+-------+-------+ 128 * 1 |G| offset1 | 129 * +-------+-------+-------+-------+-------+-------+-------+-------+ 130 * 2 | vdev2 | GRID | ASIZE | 131 * +-------+-------+-------+-------+-------+-------+-------+-------+ 132 * 3 |G| offset2 | 133 * +-------+-------+-------+-------+-------+-------+-------+-------+ 134 * 4 | vdev3 | GRID | ASIZE | 135 * +-------+-------+-------+-------+-------+-------+-------+-------+ 136 * 5 |G| offset3 | 137 * +-------+-------+-------+-------+-------+-------+-------+-------+ 138 * 6 |E| lvl | type | cksum | comp | PSIZE | LSIZE | 139 * +-------+-------+-------+-------+-------+-------+-------+-------+ 140 * 7 | padding | 141 * +-------+-------+-------+-------+-------+-------+-------+-------+ 142 * 8 | padding | 143 * +-------+-------+-------+-------+-------+-------+-------+-------+ 144 * 9 | padding | 145 * +-------+-------+-------+-------+-------+-------+-------+-------+ 146 * a | birth txg | 147 * +-------+-------+-------+-------+-------+-------+-------+-------+ 148 * b | fill count | 149 * +-------+-------+-------+-------+-------+-------+-------+-------+ 150 * c | checksum[0] | 151 * +-------+-------+-------+-------+-------+-------+-------+-------+ 152 * d | checksum[1] | 153 * +-------+-------+-------+-------+-------+-------+-------+-------+ 154 * e | checksum[2] | 155 * +-------+-------+-------+-------+-------+-------+-------+-------+ 156 * f | checksum[3] | 157 * +-------+-------+-------+-------+-------+-------+-------+-------+ 158 * 159 * Legend: 160 * 161 * vdev virtual device ID 162 * offset offset into virtual device 163 * LSIZE logical size 164 * PSIZE physical size (after compression) 165 * ASIZE allocated size (including RAID-Z parity and gang block headers) 166 * GRID RAID-Z layout information (reserved for future use) 167 * cksum checksum function 168 * comp compression function 169 * G gang block indicator 170 * E endianness 171 * type DMU object type 172 * lvl level of indirection 173 * birth txg transaction group in which the block was born 174 * fill count number of non-zero blocks under this bp 175 * checksum[4] 256-bit checksum of the data this bp describes 176 */ 177 typedef struct blkptr { 178 dva_t blk_dva[3]; /* 128-bit Data Virtual Address */ 179 uint64_t blk_prop; /* size, compression, type, etc */ 180 uint64_t blk_pad[3]; /* Extra space for the future */ 181 uint64_t blk_birth; /* transaction group at birth */ 182 uint64_t blk_fill; /* fill count */ 183 zio_cksum_t blk_cksum; /* 256-bit checksum */ 184 } blkptr_t; 185 186 #define SPA_BLKPTRSHIFT 7 /* blkptr_t is 128 bytes */ 187 #define SPA_DVAS_PER_BP 3 /* Number of DVAs in a bp */ 188 189 /* 190 * Macros to get and set fields in a bp or DVA. 191 */ 192 #define DVA_GET_ASIZE(dva) \ 193 BF64_GET_SB((dva)->dva_word[0], 0, 24, SPA_MINBLOCKSHIFT, 0) 194 #define DVA_SET_ASIZE(dva, x) \ 195 BF64_SET_SB((dva)->dva_word[0], 0, 24, SPA_MINBLOCKSHIFT, 0, x) 196 197 #define DVA_GET_GRID(dva) BF64_GET((dva)->dva_word[0], 24, 8) 198 #define DVA_SET_GRID(dva, x) BF64_SET((dva)->dva_word[0], 24, 8, x) 199 200 #define DVA_GET_VDEV(dva) BF64_GET((dva)->dva_word[0], 32, 32) 201 #define DVA_SET_VDEV(dva, x) BF64_SET((dva)->dva_word[0], 32, 32, x) 202 203 #define DVA_GET_OFFSET(dva) \ 204 BF64_GET_SB((dva)->dva_word[1], 0, 63, SPA_MINBLOCKSHIFT, 0) 205 #define DVA_SET_OFFSET(dva, x) \ 206 BF64_SET_SB((dva)->dva_word[1], 0, 63, SPA_MINBLOCKSHIFT, 0, x) 207 208 #define DVA_GET_GANG(dva) BF64_GET((dva)->dva_word[1], 63, 1) 209 #define DVA_SET_GANG(dva, x) BF64_SET((dva)->dva_word[1], 63, 1, x) 210 211 #define BP_GET_LSIZE(bp) \ 212 (BP_IS_HOLE(bp) ? 0 : \ 213 BF64_GET_SB((bp)->blk_prop, 0, 16, SPA_MINBLOCKSHIFT, 1)) 214 #define BP_SET_LSIZE(bp, x) \ 215 BF64_SET_SB((bp)->blk_prop, 0, 16, SPA_MINBLOCKSHIFT, 1, x) 216 217 #define BP_GET_PSIZE(bp) \ 218 BF64_GET_SB((bp)->blk_prop, 16, 16, SPA_MINBLOCKSHIFT, 1) 219 #define BP_SET_PSIZE(bp, x) \ 220 BF64_SET_SB((bp)->blk_prop, 16, 16, SPA_MINBLOCKSHIFT, 1, x) 221 222 #define BP_GET_COMPRESS(bp) BF64_GET((bp)->blk_prop, 32, 8) 223 #define BP_SET_COMPRESS(bp, x) BF64_SET((bp)->blk_prop, 32, 8, x) 224 225 #define BP_GET_CHECKSUM(bp) BF64_GET((bp)->blk_prop, 40, 8) 226 #define BP_SET_CHECKSUM(bp, x) BF64_SET((bp)->blk_prop, 40, 8, x) 227 228 #define BP_GET_TYPE(bp) BF64_GET((bp)->blk_prop, 48, 8) 229 #define BP_SET_TYPE(bp, x) BF64_SET((bp)->blk_prop, 48, 8, x) 230 231 #define BP_GET_LEVEL(bp) BF64_GET((bp)->blk_prop, 56, 5) 232 #define BP_SET_LEVEL(bp, x) BF64_SET((bp)->blk_prop, 56, 5, x) 233 234 #define BP_GET_BYTEORDER(bp) (0 - BF64_GET((bp)->blk_prop, 63, 1)) 235 #define BP_SET_BYTEORDER(bp, x) BF64_SET((bp)->blk_prop, 63, 1, x) 236 237 #define BP_GET_ASIZE(bp) \ 238 (DVA_GET_ASIZE(&(bp)->blk_dva[0]) + DVA_GET_ASIZE(&(bp)->blk_dva[1]) + \ 239 DVA_GET_ASIZE(&(bp)->blk_dva[2])) 240 241 #define BP_GET_UCSIZE(bp) \ 242 ((BP_GET_LEVEL(bp) > 0 || dmu_ot[BP_GET_TYPE(bp)].ot_metadata) ? \ 243 BP_GET_PSIZE(bp) : BP_GET_LSIZE(bp)); 244 245 #define BP_GET_NDVAS(bp) \ 246 (!!DVA_GET_ASIZE(&(bp)->blk_dva[0]) + \ 247 !!DVA_GET_ASIZE(&(bp)->blk_dva[1]) + \ 248 !!DVA_GET_ASIZE(&(bp)->blk_dva[2])) 249 250 #define BP_COUNT_GANG(bp) \ 251 (DVA_GET_GANG(&(bp)->blk_dva[0]) + \ 252 DVA_GET_GANG(&(bp)->blk_dva[1]) + \ 253 DVA_GET_GANG(&(bp)->blk_dva[2])) 254 255 #define DVA_EQUAL(dva1, dva2) \ 256 ((dva1)->dva_word[1] == (dva2)->dva_word[1] && \ 257 (dva1)->dva_word[0] == (dva2)->dva_word[0]) 258 259 #define ZIO_CHECKSUM_EQUAL(zc1, zc2) \ 260 (0 == (((zc1).zc_word[0] - (zc2).zc_word[0]) | \ 261 ((zc1).zc_word[1] - (zc2).zc_word[1]) | \ 262 ((zc1).zc_word[2] - (zc2).zc_word[2]) | \ 263 ((zc1).zc_word[3] - (zc2).zc_word[3]))) 264 265 266 #define DVA_IS_VALID(dva) (DVA_GET_ASIZE(dva) != 0) 267 268 #define ZIO_SET_CHECKSUM(zcp, w0, w1, w2, w3) \ 269 { \ 270 (zcp)->zc_word[0] = w0; \ 271 (zcp)->zc_word[1] = w1; \ 272 (zcp)->zc_word[2] = w2; \ 273 (zcp)->zc_word[3] = w3; \ 274 } 275 276 #define BP_IDENTITY(bp) (&(bp)->blk_dva[0]) 277 #define BP_IS_GANG(bp) DVA_GET_GANG(BP_IDENTITY(bp)) 278 #define BP_IS_HOLE(bp) ((bp)->blk_birth == 0) 279 #define BP_IS_OLDER(bp, txg) (!BP_IS_HOLE(bp) && (bp)->blk_birth < (txg)) 280 281 #define BP_ZERO_DVAS(bp) \ 282 { \ 283 (bp)->blk_dva[0].dva_word[0] = 0; \ 284 (bp)->blk_dva[0].dva_word[1] = 0; \ 285 (bp)->blk_dva[1].dva_word[0] = 0; \ 286 (bp)->blk_dva[1].dva_word[1] = 0; \ 287 (bp)->blk_dva[2].dva_word[0] = 0; \ 288 (bp)->blk_dva[2].dva_word[1] = 0; \ 289 (bp)->blk_birth = 0; \ 290 } 291 292 #define BP_ZERO(bp) \ 293 { \ 294 BP_ZERO_DVAS(bp) \ 295 (bp)->blk_prop = 0; \ 296 (bp)->blk_pad[0] = 0; \ 297 (bp)->blk_pad[1] = 0; \ 298 (bp)->blk_pad[2] = 0; \ 299 (bp)->blk_fill = 0; \ 300 ZIO_SET_CHECKSUM(&(bp)->blk_cksum, 0, 0, 0, 0); \ 301 } 302 303 /* 304 * Note: the byteorder is either 0 or -1, both of which are palindromes. 305 * This simplifies the endianness handling a bit. 306 */ 307 #ifdef _BIG_ENDIAN 308 #define ZFS_HOST_BYTEORDER (0ULL) 309 #else 310 #define ZFS_HOST_BYTEORDER (-1ULL) 311 #endif 312 313 #define BP_SHOULD_BYTESWAP(bp) (BP_GET_BYTEORDER(bp) != ZFS_HOST_BYTEORDER) 314 315 #define BP_SPRINTF_LEN 320 316 317 #include <sys/dmu.h> 318 319 #define BP_GET_BUFC_TYPE(bp) \ 320 (((BP_GET_LEVEL(bp) > 0) || (dmu_ot[BP_GET_TYPE(bp)].ot_metadata)) ? \ 321 ARC_BUFC_METADATA : ARC_BUFC_DATA); 322 /* 323 * Routines found in spa.c 324 */ 325 326 /* state manipulation functions */ 327 extern int spa_open(const char *pool, spa_t **, void *tag); 328 extern int spa_get_stats(const char *pool, nvlist_t **config, 329 char *altroot, size_t buflen); 330 extern int spa_create(const char *pool, nvlist_t *config, nvlist_t *props, 331 const char *history_str, nvlist_t *zplprops); 332 extern int spa_check_rootconf(char *devpath, char *devid, 333 nvlist_t **bestconf, uint64_t *besttxg); 334 extern boolean_t spa_rootdev_validate(nvlist_t *nv); 335 extern int spa_import_rootpool(char *devpath, char *devid); 336 extern int spa_import(const char *pool, nvlist_t *config, nvlist_t *props); 337 extern int spa_import_faulted(const char *, nvlist_t *, nvlist_t *); 338 extern nvlist_t *spa_tryimport(nvlist_t *tryconfig); 339 extern int spa_destroy(char *pool); 340 extern int spa_export(char *pool, nvlist_t **oldconfig, boolean_t force); 341 extern int spa_reset(char *pool); 342 extern void spa_async_request(spa_t *spa, int flag); 343 extern void spa_async_unrequest(spa_t *spa, int flag); 344 extern void spa_async_suspend(spa_t *spa); 345 extern void spa_async_resume(spa_t *spa); 346 extern spa_t *spa_inject_addref(char *pool); 347 extern void spa_inject_delref(spa_t *spa); 348 349 #define SPA_ASYNC_REMOVE 0x01 350 #define SPA_ASYNC_RESILVER_DONE 0x02 351 #define SPA_ASYNC_RESILVER 0x08 352 #define SPA_ASYNC_CONFIG_UPDATE 0x10 353 354 /* device manipulation */ 355 extern int spa_vdev_add(spa_t *spa, nvlist_t *nvroot); 356 extern int spa_vdev_attach(spa_t *spa, uint64_t guid, nvlist_t *nvroot, 357 int replacing); 358 extern int spa_vdev_detach(spa_t *spa, uint64_t guid, int replace_done); 359 extern int spa_vdev_remove(spa_t *spa, uint64_t guid, boolean_t unspare); 360 extern int spa_vdev_setpath(spa_t *spa, uint64_t guid, const char *newpath); 361 362 /* spare state (which is global across all pools) */ 363 extern void spa_spare_add(vdev_t *vd); 364 extern void spa_spare_remove(vdev_t *vd); 365 extern boolean_t spa_spare_exists(uint64_t guid, uint64_t *pool, int *refcnt); 366 extern void spa_spare_activate(vdev_t *vd); 367 368 /* L2ARC state (which is global across all pools) */ 369 extern void spa_l2cache_add(vdev_t *vd); 370 extern void spa_l2cache_remove(vdev_t *vd); 371 extern boolean_t spa_l2cache_exists(uint64_t guid, uint64_t *pool); 372 extern void spa_l2cache_activate(vdev_t *vd); 373 extern void spa_l2cache_drop(spa_t *spa); 374 extern void spa_l2cache_space_update(vdev_t *vd, int64_t space, int64_t alloc); 375 376 /* scrubbing */ 377 extern int spa_scrub(spa_t *spa, pool_scrub_type_t type); 378 379 /* spa syncing */ 380 extern void spa_sync(spa_t *spa, uint64_t txg); /* only for DMU use */ 381 extern void spa_sync_allpools(void); 382 383 /* spa namespace global mutex */ 384 extern kmutex_t spa_namespace_lock; 385 386 /* 387 * SPA configuration functions in spa_config.c 388 */ 389 390 #define SPA_CONFIG_UPDATE_POOL 0 391 #define SPA_CONFIG_UPDATE_VDEVS 1 392 393 extern void spa_config_sync(spa_t *, boolean_t, boolean_t); 394 extern void spa_config_load(void); 395 extern nvlist_t *spa_all_configs(uint64_t *); 396 extern void spa_config_set(spa_t *spa, nvlist_t *config); 397 extern nvlist_t *spa_config_generate(spa_t *spa, vdev_t *vd, uint64_t txg, 398 int getstats); 399 extern void spa_config_update(spa_t *spa, int what); 400 extern void spa_config_update_common(spa_t *spa, int what, boolean_t isroot); 401 402 /* 403 * Miscellaneous SPA routines in spa_misc.c 404 */ 405 406 /* Namespace manipulation */ 407 extern spa_t *spa_lookup(const char *name); 408 extern spa_t *spa_add(const char *name, const char *altroot); 409 extern void spa_remove(spa_t *spa); 410 extern spa_t *spa_next(spa_t *prev); 411 412 /* Refcount functions */ 413 extern void spa_open_ref(spa_t *spa, void *tag); 414 extern void spa_close(spa_t *spa, void *tag); 415 extern boolean_t spa_refcount_zero(spa_t *spa); 416 417 /* Pool configuration lock */ 418 extern void spa_config_enter(spa_t *spa, krw_t rw, void *tag); 419 extern void spa_config_exit(spa_t *spa, void *tag); 420 extern boolean_t spa_config_held(spa_t *spa, krw_t rw); 421 422 /* Pool vdev add/remove lock */ 423 extern uint64_t spa_vdev_enter(spa_t *spa); 424 extern int spa_vdev_exit(spa_t *spa, vdev_t *vd, uint64_t txg, int error); 425 426 /* Accessor functions */ 427 extern krwlock_t *spa_traverse_rwlock(spa_t *spa); 428 extern boolean_t spa_traverse_wanted(spa_t *spa); 429 extern struct dsl_pool *spa_get_dsl(spa_t *spa); 430 extern blkptr_t *spa_get_rootblkptr(spa_t *spa); 431 extern void spa_set_rootblkptr(spa_t *spa, const blkptr_t *bp); 432 extern void spa_altroot(spa_t *, char *, size_t); 433 extern int spa_sync_pass(spa_t *spa); 434 extern char *spa_name(spa_t *spa); 435 extern uint64_t spa_guid(spa_t *spa); 436 extern uint64_t spa_last_synced_txg(spa_t *spa); 437 extern uint64_t spa_first_txg(spa_t *spa); 438 extern uint64_t spa_version(spa_t *spa); 439 extern int spa_state(spa_t *spa); 440 extern uint64_t spa_freeze_txg(spa_t *spa); 441 extern uint64_t spa_get_alloc(spa_t *spa); 442 extern uint64_t spa_get_space(spa_t *spa); 443 extern uint64_t spa_get_dspace(spa_t *spa); 444 extern uint64_t spa_get_asize(spa_t *spa, uint64_t lsize); 445 extern uint64_t spa_version(spa_t *spa); 446 extern int spa_max_replication(spa_t *spa); 447 extern int spa_busy(void); 448 extern uint8_t spa_get_failmode(spa_t *spa); 449 450 /* Miscellaneous support routines */ 451 extern int spa_rename(const char *oldname, const char *newname); 452 extern boolean_t spa_guid_exists(uint64_t pool_guid, uint64_t device_guid); 453 extern char *spa_strdup(const char *); 454 extern void spa_strfree(char *); 455 extern uint64_t spa_get_random(uint64_t range); 456 extern void sprintf_blkptr(char *buf, int len, const blkptr_t *bp); 457 extern void spa_freeze(spa_t *spa); 458 extern void spa_upgrade(spa_t *spa, uint64_t version); 459 extern void spa_evict_all(void); 460 extern vdev_t *spa_lookup_by_guid(spa_t *spa, uint64_t guid, 461 boolean_t l2cache); 462 extern boolean_t spa_has_spare(spa_t *, uint64_t guid); 463 extern uint64_t bp_get_dasize(spa_t *spa, const blkptr_t *bp); 464 extern boolean_t spa_has_slogs(spa_t *spa); 465 extern boolean_t spa_is_root(spa_t *spa); 466 467 /* history logging */ 468 typedef enum history_log_type { 469 LOG_CMD_POOL_CREATE, 470 LOG_CMD_NORMAL, 471 LOG_INTERNAL 472 } history_log_type_t; 473 474 typedef struct history_arg { 475 const char *ha_history_str; 476 history_log_type_t ha_log_type; 477 history_internal_events_t ha_event; 478 char ha_zone[MAXPATHLEN]; 479 } history_arg_t; 480 481 extern char *spa_his_ievent_table[]; 482 483 extern void spa_history_create_obj(spa_t *spa, dmu_tx_t *tx); 484 extern int spa_history_get(spa_t *spa, uint64_t *offset, uint64_t *len_read, 485 char *his_buf); 486 extern int spa_history_log(spa_t *spa, const char *his_buf, 487 history_log_type_t what); 488 void spa_history_internal_log(history_internal_events_t event, spa_t *spa, 489 dmu_tx_t *tx, cred_t *cr, const char *fmt, ...); 490 491 /* error handling */ 492 struct zbookmark; 493 struct zio; 494 extern void spa_log_error(spa_t *spa, struct zio *zio); 495 extern void zfs_ereport_post(const char *class, spa_t *spa, vdev_t *vd, 496 struct zio *zio, uint64_t stateoroffset, uint64_t length); 497 extern void zfs_post_remove(spa_t *spa, vdev_t *vd); 498 extern void zfs_post_autoreplace(spa_t *spa, vdev_t *vd); 499 extern uint64_t spa_get_errlog_size(spa_t *spa); 500 extern int spa_get_errlog(spa_t *spa, void *uaddr, size_t *count); 501 extern void spa_errlog_rotate(spa_t *spa); 502 extern void spa_errlog_drain(spa_t *spa); 503 extern void spa_errlog_sync(spa_t *spa, uint64_t txg); 504 extern void spa_get_errlists(spa_t *spa, avl_tree_t *last, avl_tree_t *scrub); 505 506 /* vdev cache */ 507 extern void vdev_cache_stat_init(void); 508 extern void vdev_cache_stat_fini(void); 509 510 /* Initialization and termination */ 511 extern void spa_init(int flags); 512 extern void spa_fini(void); 513 extern void spa_boot_init(); 514 515 /* properties */ 516 extern int spa_prop_set(spa_t *spa, nvlist_t *nvp); 517 extern int spa_prop_get(spa_t *spa, nvlist_t **nvp); 518 extern void spa_prop_clear_bootfs(spa_t *spa, uint64_t obj, dmu_tx_t *tx); 519 520 /* asynchronous event notification */ 521 extern void spa_event_notify(spa_t *spa, vdev_t *vdev, const char *name); 522 523 #ifdef ZFS_DEBUG 524 #define dprintf_bp(bp, fmt, ...) do { \ 525 if (zfs_flags & ZFS_DEBUG_DPRINTF) { \ 526 char *__blkbuf = kmem_alloc(BP_SPRINTF_LEN, KM_SLEEP); \ 527 sprintf_blkptr(__blkbuf, BP_SPRINTF_LEN, (bp)); \ 528 dprintf(fmt " %s\n", __VA_ARGS__, __blkbuf); \ 529 kmem_free(__blkbuf, BP_SPRINTF_LEN); \ 530 } \ 531 _NOTE(CONSTCOND) } while (0) 532 #else 533 #define dprintf_bp(bp, fmt, ...) 534 #endif 535 536 extern int spa_mode; /* mode, e.g. FREAD | FWRITE */ 537 538 #ifdef __cplusplus 539 } 540 #endif 541 542 #endif /* _SYS_SPA_H */ 543