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 2009 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 spa_aux_vdev spa_aux_vdev_t; 48 struct dsl_pool; 49 50 /* 51 * General-purpose 32-bit and 64-bit bitfield encodings. 52 */ 53 #define BF32_DECODE(x, low, len) P2PHASE((x) >> (low), 1U << (len)) 54 #define BF64_DECODE(x, low, len) P2PHASE((x) >> (low), 1ULL << (len)) 55 #define BF32_ENCODE(x, low, len) (P2PHASE((x), 1U << (len)) << (low)) 56 #define BF64_ENCODE(x, low, len) (P2PHASE((x), 1ULL << (len)) << (low)) 57 58 #define BF32_GET(x, low, len) BF32_DECODE(x, low, len) 59 #define BF64_GET(x, low, len) BF64_DECODE(x, low, len) 60 61 #define BF32_SET(x, low, len, val) \ 62 ((x) ^= BF32_ENCODE((x >> low) ^ (val), low, len)) 63 #define BF64_SET(x, low, len, val) \ 64 ((x) ^= BF64_ENCODE((x >> low) ^ (val), low, len)) 65 66 #define BF32_GET_SB(x, low, len, shift, bias) \ 67 ((BF32_GET(x, low, len) + (bias)) << (shift)) 68 #define BF64_GET_SB(x, low, len, shift, bias) \ 69 ((BF64_GET(x, low, len) + (bias)) << (shift)) 70 71 #define BF32_SET_SB(x, low, len, shift, bias, val) \ 72 BF32_SET(x, low, len, ((val) >> (shift)) - (bias)) 73 #define BF64_SET_SB(x, low, len, shift, bias, val) \ 74 BF64_SET(x, low, len, ((val) >> (shift)) - (bias)) 75 76 /* 77 * We currently support nine block sizes, from 512 bytes to 128K. 78 * We could go higher, but the benefits are near-zero and the cost 79 * of COWing a giant block to modify one byte would become excessive. 80 */ 81 #define SPA_MINBLOCKSHIFT 9 82 #define SPA_MAXBLOCKSHIFT 17 83 #define SPA_MINBLOCKSIZE (1ULL << SPA_MINBLOCKSHIFT) 84 #define SPA_MAXBLOCKSIZE (1ULL << SPA_MAXBLOCKSHIFT) 85 86 #define SPA_BLOCKSIZES (SPA_MAXBLOCKSHIFT - SPA_MINBLOCKSHIFT + 1) 87 88 /* 89 * Size of block to hold the configuration data (a packed nvlist) 90 */ 91 #define SPA_CONFIG_BLOCKSIZE (1 << 14) 92 93 /* 94 * The DVA size encodings for LSIZE and PSIZE support blocks up to 32MB. 95 * The ASIZE encoding should be at least 64 times larger (6 more bits) 96 * to support up to 4-way RAID-Z mirror mode with worst-case gang block 97 * overhead, three DVAs per bp, plus one more bit in case we do anything 98 * else that expands the ASIZE. 99 */ 100 #define SPA_LSIZEBITS 16 /* LSIZE up to 32M (2^16 * 512) */ 101 #define SPA_PSIZEBITS 16 /* PSIZE up to 32M (2^16 * 512) */ 102 #define SPA_ASIZEBITS 24 /* ASIZE up to 64 times larger */ 103 104 /* 105 * All SPA data is represented by 128-bit data virtual addresses (DVAs). 106 * The members of the dva_t should be considered opaque outside the SPA. 107 */ 108 typedef struct dva { 109 uint64_t dva_word[2]; 110 } dva_t; 111 112 /* 113 * Each block has a 256-bit checksum -- strong enough for cryptographic hashes. 114 */ 115 typedef struct zio_cksum { 116 uint64_t zc_word[4]; 117 } zio_cksum_t; 118 119 /* 120 * Each block is described by its DVAs, time of birth, checksum, etc. 121 * The word-by-word, bit-by-bit layout of the blkptr is as follows: 122 * 123 * 64 56 48 40 32 24 16 8 0 124 * +-------+-------+-------+-------+-------+-------+-------+-------+ 125 * 0 | vdev1 | GRID | ASIZE | 126 * +-------+-------+-------+-------+-------+-------+-------+-------+ 127 * 1 |G| offset1 | 128 * +-------+-------+-------+-------+-------+-------+-------+-------+ 129 * 2 | vdev2 | GRID | ASIZE | 130 * +-------+-------+-------+-------+-------+-------+-------+-------+ 131 * 3 |G| offset2 | 132 * +-------+-------+-------+-------+-------+-------+-------+-------+ 133 * 4 | vdev3 | GRID | ASIZE | 134 * +-------+-------+-------+-------+-------+-------+-------+-------+ 135 * 5 |G| offset3 | 136 * +-------+-------+-------+-------+-------+-------+-------+-------+ 137 * 6 |E| lvl | type | cksum | comp | PSIZE | LSIZE | 138 * +-------+-------+-------+-------+-------+-------+-------+-------+ 139 * 7 | padding | 140 * +-------+-------+-------+-------+-------+-------+-------+-------+ 141 * 8 | padding | 142 * +-------+-------+-------+-------+-------+-------+-------+-------+ 143 * 9 | padding | 144 * +-------+-------+-------+-------+-------+-------+-------+-------+ 145 * a | birth txg | 146 * +-------+-------+-------+-------+-------+-------+-------+-------+ 147 * b | fill count | 148 * +-------+-------+-------+-------+-------+-------+-------+-------+ 149 * c | checksum[0] | 150 * +-------+-------+-------+-------+-------+-------+-------+-------+ 151 * d | checksum[1] | 152 * +-------+-------+-------+-------+-------+-------+-------+-------+ 153 * e | checksum[2] | 154 * +-------+-------+-------+-------+-------+-------+-------+-------+ 155 * f | checksum[3] | 156 * +-------+-------+-------+-------+-------+-------+-------+-------+ 157 * 158 * Legend: 159 * 160 * vdev virtual device ID 161 * offset offset into virtual device 162 * LSIZE logical size 163 * PSIZE physical size (after compression) 164 * ASIZE allocated size (including RAID-Z parity and gang block headers) 165 * GRID RAID-Z layout information (reserved for future use) 166 * cksum checksum function 167 * comp compression function 168 * G gang block indicator 169 * E endianness 170 * type DMU object type 171 * lvl level of indirection 172 * birth txg transaction group in which the block was born 173 * fill count number of non-zero blocks under this bp 174 * checksum[4] 256-bit checksum of the data this bp describes 175 */ 176 typedef struct blkptr { 177 dva_t blk_dva[3]; /* 128-bit Data Virtual Address */ 178 uint64_t blk_prop; /* size, compression, type, etc */ 179 uint64_t blk_pad[3]; /* Extra space for the future */ 180 uint64_t blk_birth; /* transaction group at birth */ 181 uint64_t blk_fill; /* fill count */ 182 zio_cksum_t blk_cksum; /* 256-bit checksum */ 183 } blkptr_t; 184 185 #define SPA_BLKPTRSHIFT 7 /* blkptr_t is 128 bytes */ 186 #define SPA_DVAS_PER_BP 3 /* Number of DVAs in a bp */ 187 188 /* 189 * Macros to get and set fields in a bp or DVA. 190 */ 191 #define DVA_GET_ASIZE(dva) \ 192 BF64_GET_SB((dva)->dva_word[0], 0, 24, SPA_MINBLOCKSHIFT, 0) 193 #define DVA_SET_ASIZE(dva, x) \ 194 BF64_SET_SB((dva)->dva_word[0], 0, 24, SPA_MINBLOCKSHIFT, 0, x) 195 196 #define DVA_GET_GRID(dva) BF64_GET((dva)->dva_word[0], 24, 8) 197 #define DVA_SET_GRID(dva, x) BF64_SET((dva)->dva_word[0], 24, 8, x) 198 199 #define DVA_GET_VDEV(dva) BF64_GET((dva)->dva_word[0], 32, 32) 200 #define DVA_SET_VDEV(dva, x) BF64_SET((dva)->dva_word[0], 32, 32, x) 201 202 #define DVA_GET_OFFSET(dva) \ 203 BF64_GET_SB((dva)->dva_word[1], 0, 63, SPA_MINBLOCKSHIFT, 0) 204 #define DVA_SET_OFFSET(dva, x) \ 205 BF64_SET_SB((dva)->dva_word[1], 0, 63, SPA_MINBLOCKSHIFT, 0, x) 206 207 #define DVA_GET_GANG(dva) BF64_GET((dva)->dva_word[1], 63, 1) 208 #define DVA_SET_GANG(dva, x) BF64_SET((dva)->dva_word[1], 63, 1, x) 209 210 #define BP_GET_LSIZE(bp) \ 211 (BP_IS_HOLE(bp) ? 0 : \ 212 BF64_GET_SB((bp)->blk_prop, 0, 16, SPA_MINBLOCKSHIFT, 1)) 213 #define BP_SET_LSIZE(bp, x) \ 214 BF64_SET_SB((bp)->blk_prop, 0, 16, SPA_MINBLOCKSHIFT, 1, x) 215 216 #define BP_GET_PSIZE(bp) \ 217 BF64_GET_SB((bp)->blk_prop, 16, 16, SPA_MINBLOCKSHIFT, 1) 218 #define BP_SET_PSIZE(bp, x) \ 219 BF64_SET_SB((bp)->blk_prop, 16, 16, SPA_MINBLOCKSHIFT, 1, x) 220 221 #define BP_GET_COMPRESS(bp) BF64_GET((bp)->blk_prop, 32, 8) 222 #define BP_SET_COMPRESS(bp, x) BF64_SET((bp)->blk_prop, 32, 8, x) 223 224 #define BP_GET_CHECKSUM(bp) BF64_GET((bp)->blk_prop, 40, 8) 225 #define BP_SET_CHECKSUM(bp, x) BF64_SET((bp)->blk_prop, 40, 8, x) 226 227 #define BP_GET_TYPE(bp) BF64_GET((bp)->blk_prop, 48, 8) 228 #define BP_SET_TYPE(bp, x) BF64_SET((bp)->blk_prop, 48, 8, x) 229 230 #define BP_GET_LEVEL(bp) BF64_GET((bp)->blk_prop, 56, 5) 231 #define BP_SET_LEVEL(bp, x) BF64_SET((bp)->blk_prop, 56, 5, x) 232 233 #define BP_GET_BYTEORDER(bp) (0 - BF64_GET((bp)->blk_prop, 63, 1)) 234 #define BP_SET_BYTEORDER(bp, x) BF64_SET((bp)->blk_prop, 63, 1, x) 235 236 #define BP_GET_ASIZE(bp) \ 237 (DVA_GET_ASIZE(&(bp)->blk_dva[0]) + DVA_GET_ASIZE(&(bp)->blk_dva[1]) + \ 238 DVA_GET_ASIZE(&(bp)->blk_dva[2])) 239 240 #define BP_GET_UCSIZE(bp) \ 241 ((BP_GET_LEVEL(bp) > 0 || dmu_ot[BP_GET_TYPE(bp)].ot_metadata) ? \ 242 BP_GET_PSIZE(bp) : BP_GET_LSIZE(bp)); 243 244 #define BP_GET_NDVAS(bp) \ 245 (!!DVA_GET_ASIZE(&(bp)->blk_dva[0]) + \ 246 !!DVA_GET_ASIZE(&(bp)->blk_dva[1]) + \ 247 !!DVA_GET_ASIZE(&(bp)->blk_dva[2])) 248 249 #define BP_COUNT_GANG(bp) \ 250 (DVA_GET_GANG(&(bp)->blk_dva[0]) + \ 251 DVA_GET_GANG(&(bp)->blk_dva[1]) + \ 252 DVA_GET_GANG(&(bp)->blk_dva[2])) 253 254 #define DVA_EQUAL(dva1, dva2) \ 255 ((dva1)->dva_word[1] == (dva2)->dva_word[1] && \ 256 (dva1)->dva_word[0] == (dva2)->dva_word[0]) 257 258 #define ZIO_CHECKSUM_EQUAL(zc1, zc2) \ 259 (0 == (((zc1).zc_word[0] - (zc2).zc_word[0]) | \ 260 ((zc1).zc_word[1] - (zc2).zc_word[1]) | \ 261 ((zc1).zc_word[2] - (zc2).zc_word[2]) | \ 262 ((zc1).zc_word[3] - (zc2).zc_word[3]))) 263 264 #define DVA_IS_VALID(dva) (DVA_GET_ASIZE(dva) != 0) 265 266 #define ZIO_SET_CHECKSUM(zcp, w0, w1, w2, w3) \ 267 { \ 268 (zcp)->zc_word[0] = w0; \ 269 (zcp)->zc_word[1] = w1; \ 270 (zcp)->zc_word[2] = w2; \ 271 (zcp)->zc_word[3] = w3; \ 272 } 273 274 #define BP_IDENTITY(bp) (&(bp)->blk_dva[0]) 275 #define BP_IS_GANG(bp) DVA_GET_GANG(BP_IDENTITY(bp)) 276 #define BP_IS_HOLE(bp) ((bp)->blk_birth == 0) 277 #define BP_IS_OLDER(bp, txg) (!BP_IS_HOLE(bp) && (bp)->blk_birth < (txg)) 278 279 #define BP_ZERO(bp) \ 280 { \ 281 (bp)->blk_dva[0].dva_word[0] = 0; \ 282 (bp)->blk_dva[0].dva_word[1] = 0; \ 283 (bp)->blk_dva[1].dva_word[0] = 0; \ 284 (bp)->blk_dva[1].dva_word[1] = 0; \ 285 (bp)->blk_dva[2].dva_word[0] = 0; \ 286 (bp)->blk_dva[2].dva_word[1] = 0; \ 287 (bp)->blk_prop = 0; \ 288 (bp)->blk_pad[0] = 0; \ 289 (bp)->blk_pad[1] = 0; \ 290 (bp)->blk_pad[2] = 0; \ 291 (bp)->blk_birth = 0; \ 292 (bp)->blk_fill = 0; \ 293 ZIO_SET_CHECKSUM(&(bp)->blk_cksum, 0, 0, 0, 0); \ 294 } 295 296 #define BLK_FILL_ALREADY_FREED (-1ULL) 297 298 /* 299 * Note: the byteorder is either 0 or -1, both of which are palindromes. 300 * This simplifies the endianness handling a bit. 301 */ 302 #ifdef _BIG_ENDIAN 303 #define ZFS_HOST_BYTEORDER (0ULL) 304 #else 305 #define ZFS_HOST_BYTEORDER (-1ULL) 306 #endif 307 308 #define BP_SHOULD_BYTESWAP(bp) (BP_GET_BYTEORDER(bp) != ZFS_HOST_BYTEORDER) 309 310 #define BP_SPRINTF_LEN 320 311 312 #include <sys/dmu.h> 313 314 #define BP_GET_BUFC_TYPE(bp) \ 315 (((BP_GET_LEVEL(bp) > 0) || (dmu_ot[BP_GET_TYPE(bp)].ot_metadata)) ? \ 316 ARC_BUFC_METADATA : ARC_BUFC_DATA); 317 /* 318 * Routines found in spa.c 319 */ 320 321 /* state manipulation functions */ 322 extern int spa_open(const char *pool, spa_t **, void *tag); 323 extern int spa_get_stats(const char *pool, nvlist_t **config, 324 char *altroot, size_t buflen); 325 extern int spa_create(const char *pool, nvlist_t *config, nvlist_t *props, 326 const char *history_str, nvlist_t *zplprops); 327 extern int spa_import_rootpool(char *devpath, char *devid); 328 extern int spa_import(const char *pool, nvlist_t *config, nvlist_t *props); 329 extern int spa_import_verbatim(const char *, nvlist_t *, nvlist_t *); 330 extern nvlist_t *spa_tryimport(nvlist_t *tryconfig); 331 extern int spa_destroy(char *pool); 332 extern int spa_export(char *pool, nvlist_t **oldconfig, boolean_t force, 333 boolean_t hardforce); 334 extern int spa_reset(char *pool); 335 extern void spa_async_request(spa_t *spa, int flag); 336 extern void spa_async_unrequest(spa_t *spa, int flag); 337 extern void spa_async_suspend(spa_t *spa); 338 extern void spa_async_resume(spa_t *spa); 339 extern spa_t *spa_inject_addref(char *pool); 340 extern void spa_inject_delref(spa_t *spa); 341 342 #define SPA_ASYNC_CONFIG_UPDATE 0x01 343 #define SPA_ASYNC_REMOVE 0x02 344 #define SPA_ASYNC_PROBE 0x04 345 #define SPA_ASYNC_RESILVER_DONE 0x08 346 #define SPA_ASYNC_RESILVER 0x10 347 #define SPA_ASYNC_AUTOEXPAND 0x20 348 349 /* device manipulation */ 350 extern int spa_vdev_add(spa_t *spa, nvlist_t *nvroot); 351 extern int spa_vdev_attach(spa_t *spa, uint64_t guid, nvlist_t *nvroot, 352 int replacing); 353 extern int spa_vdev_detach(spa_t *spa, uint64_t guid, uint64_t pguid, 354 int replace_done); 355 extern int spa_vdev_remove(spa_t *spa, uint64_t guid, boolean_t unspare); 356 extern int spa_vdev_setpath(spa_t *spa, uint64_t guid, const char *newpath); 357 extern int spa_vdev_setfru(spa_t *spa, uint64_t guid, const char *newfru); 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 #define SCL_CONFIG 0x01 415 #define SCL_STATE 0x02 416 #define SCL_L2ARC 0x04 /* hack until L2ARC 2.0 */ 417 #define SCL_ALLOC 0x08 418 #define SCL_ZIO 0x10 419 #define SCL_FREE 0x20 420 #define SCL_VDEV 0x40 421 #define SCL_LOCKS 7 422 #define SCL_ALL ((1 << SCL_LOCKS) - 1) 423 #define SCL_STATE_ALL (SCL_STATE | SCL_L2ARC | SCL_ZIO) 424 425 /* Pool configuration locks */ 426 extern int spa_config_tryenter(spa_t *spa, int locks, void *tag, krw_t rw); 427 extern void spa_config_enter(spa_t *spa, int locks, void *tag, krw_t rw); 428 extern void spa_config_exit(spa_t *spa, int locks, void *tag); 429 extern int spa_config_held(spa_t *spa, int locks, krw_t rw); 430 431 /* Pool vdev add/remove lock */ 432 extern uint64_t spa_vdev_enter(spa_t *spa); 433 extern int spa_vdev_exit(spa_t *spa, vdev_t *vd, uint64_t txg, int error); 434 435 /* Pool vdev state change lock */ 436 extern void spa_vdev_state_enter(spa_t *spa); 437 extern int spa_vdev_state_exit(spa_t *spa, vdev_t *vd, int error); 438 439 /* Accessor functions */ 440 extern boolean_t spa_shutting_down(spa_t *spa); 441 extern struct dsl_pool *spa_get_dsl(spa_t *spa); 442 extern blkptr_t *spa_get_rootblkptr(spa_t *spa); 443 extern void spa_set_rootblkptr(spa_t *spa, const blkptr_t *bp); 444 extern void spa_altroot(spa_t *, char *, size_t); 445 extern int spa_sync_pass(spa_t *spa); 446 extern char *spa_name(spa_t *spa); 447 extern uint64_t spa_guid(spa_t *spa); 448 extern uint64_t spa_last_synced_txg(spa_t *spa); 449 extern uint64_t spa_first_txg(spa_t *spa); 450 extern uint64_t spa_version(spa_t *spa); 451 extern pool_state_t spa_state(spa_t *spa); 452 extern uint64_t spa_freeze_txg(spa_t *spa); 453 extern uint64_t spa_get_alloc(spa_t *spa); 454 extern uint64_t spa_get_space(spa_t *spa); 455 extern uint64_t spa_get_dspace(spa_t *spa); 456 extern uint64_t spa_get_asize(spa_t *spa, uint64_t lsize); 457 extern uint64_t spa_version(spa_t *spa); 458 extern int spa_max_replication(spa_t *spa); 459 extern int spa_busy(void); 460 extern uint8_t spa_get_failmode(spa_t *spa); 461 extern boolean_t spa_suspended(spa_t *spa); 462 463 /* Miscellaneous support routines */ 464 extern int spa_rename(const char *oldname, const char *newname); 465 extern boolean_t spa_guid_exists(uint64_t pool_guid, uint64_t device_guid); 466 extern char *spa_strdup(const char *); 467 extern void spa_strfree(char *); 468 extern uint64_t spa_get_random(uint64_t range); 469 extern void sprintf_blkptr(char *buf, int len, const blkptr_t *bp); 470 extern void spa_freeze(spa_t *spa); 471 extern void spa_upgrade(spa_t *spa, uint64_t version); 472 extern void spa_evict_all(void); 473 extern vdev_t *spa_lookup_by_guid(spa_t *spa, uint64_t guid, 474 boolean_t l2cache); 475 extern boolean_t spa_has_spare(spa_t *, uint64_t guid); 476 extern uint64_t bp_get_dasize(spa_t *spa, const blkptr_t *bp); 477 extern boolean_t spa_has_slogs(spa_t *spa); 478 extern boolean_t spa_is_root(spa_t *spa); 479 extern boolean_t spa_writeable(spa_t *spa); 480 extern int spa_mode(spa_t *spa); 481 482 /* history logging */ 483 typedef enum history_log_type { 484 LOG_CMD_POOL_CREATE, 485 LOG_CMD_NORMAL, 486 LOG_INTERNAL 487 } history_log_type_t; 488 489 typedef struct history_arg { 490 const char *ha_history_str; 491 history_log_type_t ha_log_type; 492 history_internal_events_t ha_event; 493 char ha_zone[MAXPATHLEN]; 494 } history_arg_t; 495 496 extern char *spa_his_ievent_table[]; 497 498 extern void spa_history_create_obj(spa_t *spa, dmu_tx_t *tx); 499 extern int spa_history_get(spa_t *spa, uint64_t *offset, uint64_t *len_read, 500 char *his_buf); 501 extern int spa_history_log(spa_t *spa, const char *his_buf, 502 history_log_type_t what); 503 extern void spa_history_internal_log(history_internal_events_t event, 504 spa_t *spa, dmu_tx_t *tx, cred_t *cr, const char *fmt, ...); 505 extern void spa_history_log_version(spa_t *spa, history_internal_events_t evt); 506 507 /* error handling */ 508 struct zbookmark; 509 struct zio; 510 extern void spa_log_error(spa_t *spa, struct zio *zio); 511 extern void zfs_ereport_post(const char *class, spa_t *spa, vdev_t *vd, 512 struct zio *zio, uint64_t stateoroffset, uint64_t length); 513 extern void zfs_post_remove(spa_t *spa, vdev_t *vd); 514 extern void zfs_post_autoreplace(spa_t *spa, vdev_t *vd); 515 extern uint64_t spa_get_errlog_size(spa_t *spa); 516 extern int spa_get_errlog(spa_t *spa, void *uaddr, size_t *count); 517 extern void spa_errlog_rotate(spa_t *spa); 518 extern void spa_errlog_drain(spa_t *spa); 519 extern void spa_errlog_sync(spa_t *spa, uint64_t txg); 520 extern void spa_get_errlists(spa_t *spa, avl_tree_t *last, avl_tree_t *scrub); 521 522 /* vdev cache */ 523 extern void vdev_cache_stat_init(void); 524 extern void vdev_cache_stat_fini(void); 525 526 /* Initialization and termination */ 527 extern void spa_init(int flags); 528 extern void spa_fini(void); 529 extern void spa_boot_init(); 530 531 /* properties */ 532 extern int spa_prop_set(spa_t *spa, nvlist_t *nvp); 533 extern int spa_prop_get(spa_t *spa, nvlist_t **nvp); 534 extern void spa_prop_clear_bootfs(spa_t *spa, uint64_t obj, dmu_tx_t *tx); 535 extern void spa_configfile_set(spa_t *, nvlist_t *, boolean_t); 536 537 /* asynchronous event notification */ 538 extern void spa_event_notify(spa_t *spa, vdev_t *vdev, const char *name); 539 540 #ifdef ZFS_DEBUG 541 #define dprintf_bp(bp, fmt, ...) do { \ 542 if (zfs_flags & ZFS_DEBUG_DPRINTF) { \ 543 char *__blkbuf = kmem_alloc(BP_SPRINTF_LEN, KM_SLEEP); \ 544 sprintf_blkptr(__blkbuf, BP_SPRINTF_LEN, (bp)); \ 545 dprintf(fmt " %s\n", __VA_ARGS__, __blkbuf); \ 546 kmem_free(__blkbuf, BP_SPRINTF_LEN); \ 547 } \ 548 _NOTE(CONSTCOND) } while (0) 549 #else 550 #define dprintf_bp(bp, fmt, ...) 551 #endif 552 553 extern int spa_mode_global; /* mode, e.g. FREAD | FWRITE */ 554 555 #ifdef __cplusplus 556 } 557 #endif 558 559 #endif /* _SYS_SPA_H */ 560