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 /* 23 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 24 * Copyright 2011 Nexenta Systems, Inc. All rights reserved. 25 * Copyright (c) 2012, 2020 by Delphix. All rights reserved. 26 * Copyright (c) 2013 by Saso Kiselkov. All rights reserved. 27 * Copyright (c) 2013, Joyent, Inc. All rights reserved. 28 * Copyright 2016 Toomas Soome <[email protected]> 29 * Copyright (c) 2019, Allan Jude 30 * Copyright (c) 2019, Klara Inc. 31 * Copyright (c) 2019-2020, Michael Niewöhner 32 */ 33 34 #ifndef _ZIO_H 35 #define _ZIO_H 36 37 #include <sys/zio_priority.h> 38 #include <sys/zfs_context.h> 39 #include <sys/spa.h> 40 #include <sys/txg.h> 41 #include <sys/avl.h> 42 #include <sys/fs/zfs.h> 43 #include <sys/zio_impl.h> 44 45 #ifdef __cplusplus 46 extern "C" { 47 #endif 48 49 /* 50 * Embedded checksum 51 */ 52 #define ZEC_MAGIC 0x210da7ab10c7a11ULL 53 54 typedef struct zio_eck { 55 uint64_t zec_magic; /* for validation, endianness */ 56 zio_cksum_t zec_cksum; /* 256-bit checksum */ 57 } zio_eck_t; 58 59 /* 60 * Gang block headers are self-checksumming and contain an array 61 * of block pointers. 62 */ 63 #define SPA_GANGBLOCKSIZE SPA_MINBLOCKSIZE 64 #define SPA_GBH_NBLKPTRS ((SPA_GANGBLOCKSIZE - \ 65 sizeof (zio_eck_t)) / sizeof (blkptr_t)) 66 #define SPA_GBH_FILLER ((SPA_GANGBLOCKSIZE - \ 67 sizeof (zio_eck_t) - \ 68 (SPA_GBH_NBLKPTRS * sizeof (blkptr_t))) /\ 69 sizeof (uint64_t)) 70 71 typedef struct zio_gbh { 72 blkptr_t zg_blkptr[SPA_GBH_NBLKPTRS]; 73 uint64_t zg_filler[SPA_GBH_FILLER]; 74 zio_eck_t zg_tail; 75 } zio_gbh_phys_t; 76 77 enum zio_checksum { 78 ZIO_CHECKSUM_INHERIT = 0, 79 ZIO_CHECKSUM_ON, 80 ZIO_CHECKSUM_OFF, 81 ZIO_CHECKSUM_LABEL, 82 ZIO_CHECKSUM_GANG_HEADER, 83 ZIO_CHECKSUM_ZILOG, 84 ZIO_CHECKSUM_FLETCHER_2, 85 ZIO_CHECKSUM_FLETCHER_4, 86 ZIO_CHECKSUM_SHA256, 87 ZIO_CHECKSUM_ZILOG2, 88 ZIO_CHECKSUM_NOPARITY, 89 ZIO_CHECKSUM_SHA512, 90 ZIO_CHECKSUM_SKEIN, 91 #if !defined(__FreeBSD__) 92 ZIO_CHECKSUM_EDONR, 93 #endif 94 ZIO_CHECKSUM_FUNCTIONS 95 }; 96 97 /* 98 * The number of "legacy" compression functions which can be set on individual 99 * objects. 100 */ 101 #define ZIO_CHECKSUM_LEGACY_FUNCTIONS ZIO_CHECKSUM_ZILOG2 102 103 #define ZIO_CHECKSUM_ON_VALUE ZIO_CHECKSUM_FLETCHER_4 104 #define ZIO_CHECKSUM_DEFAULT ZIO_CHECKSUM_ON 105 106 #define ZIO_CHECKSUM_MASK 0xffULL 107 #define ZIO_CHECKSUM_VERIFY (1 << 8) 108 109 #define ZIO_DEDUPCHECKSUM ZIO_CHECKSUM_SHA256 110 111 /* supported encryption algorithms */ 112 enum zio_encrypt { 113 ZIO_CRYPT_INHERIT = 0, 114 ZIO_CRYPT_ON, 115 ZIO_CRYPT_OFF, 116 ZIO_CRYPT_AES_128_CCM, 117 ZIO_CRYPT_AES_192_CCM, 118 ZIO_CRYPT_AES_256_CCM, 119 ZIO_CRYPT_AES_128_GCM, 120 ZIO_CRYPT_AES_192_GCM, 121 ZIO_CRYPT_AES_256_GCM, 122 ZIO_CRYPT_FUNCTIONS 123 }; 124 125 #define ZIO_CRYPT_ON_VALUE ZIO_CRYPT_AES_256_GCM 126 #define ZIO_CRYPT_DEFAULT ZIO_CRYPT_OFF 127 128 /* macros defining encryption lengths */ 129 #define ZIO_OBJSET_MAC_LEN 32 130 #define ZIO_DATA_IV_LEN 12 131 #define ZIO_DATA_SALT_LEN 8 132 #define ZIO_DATA_MAC_LEN 16 133 134 /* 135 * The number of "legacy" compression functions which can be set on individual 136 * objects. 137 */ 138 #define ZIO_COMPRESS_LEGACY_FUNCTIONS ZIO_COMPRESS_LZ4 139 140 /* 141 * The meaning of "compress = on" selected by the compression features enabled 142 * on a given pool. 143 */ 144 #define ZIO_COMPRESS_LEGACY_ON_VALUE ZIO_COMPRESS_LZJB 145 #define ZIO_COMPRESS_LZ4_ON_VALUE ZIO_COMPRESS_LZ4 146 147 #define ZIO_COMPRESS_DEFAULT ZIO_COMPRESS_OFF 148 149 #define BOOTFS_COMPRESS_VALID(compress) \ 150 ((compress) == ZIO_COMPRESS_LZJB || \ 151 (compress) == ZIO_COMPRESS_LZ4 || \ 152 (compress) == ZIO_COMPRESS_GZIP_1 || \ 153 (compress) == ZIO_COMPRESS_GZIP_2 || \ 154 (compress) == ZIO_COMPRESS_GZIP_3 || \ 155 (compress) == ZIO_COMPRESS_GZIP_4 || \ 156 (compress) == ZIO_COMPRESS_GZIP_5 || \ 157 (compress) == ZIO_COMPRESS_GZIP_6 || \ 158 (compress) == ZIO_COMPRESS_GZIP_7 || \ 159 (compress) == ZIO_COMPRESS_GZIP_8 || \ 160 (compress) == ZIO_COMPRESS_GZIP_9 || \ 161 (compress) == ZIO_COMPRESS_ZLE || \ 162 (compress) == ZIO_COMPRESS_ZSTD || \ 163 (compress) == ZIO_COMPRESS_ON || \ 164 (compress) == ZIO_COMPRESS_OFF) 165 166 167 #define ZIO_COMPRESS_ALGO(x) (x & SPA_COMPRESSMASK) 168 #define ZIO_COMPRESS_LEVEL(x) ((x & ~SPA_COMPRESSMASK) >> SPA_COMPRESSBITS) 169 #define ZIO_COMPRESS_RAW(type, level) (type | ((level) << SPA_COMPRESSBITS)) 170 171 #define ZIO_COMPLEVEL_ZSTD(level) \ 172 ZIO_COMPRESS_RAW(ZIO_COMPRESS_ZSTD, level) 173 174 #define ZIO_FAILURE_MODE_WAIT 0 175 #define ZIO_FAILURE_MODE_CONTINUE 1 176 #define ZIO_FAILURE_MODE_PANIC 2 177 178 typedef enum zio_suspend_reason { 179 ZIO_SUSPEND_NONE = 0, 180 ZIO_SUSPEND_IOERR, 181 ZIO_SUSPEND_MMP, 182 } zio_suspend_reason_t; 183 184 enum zio_flag { 185 /* 186 * Flags inherited by gang, ddt, and vdev children, 187 * and that must be equal for two zios to aggregate 188 */ 189 ZIO_FLAG_DONT_AGGREGATE = 1 << 0, 190 ZIO_FLAG_IO_REPAIR = 1 << 1, 191 ZIO_FLAG_SELF_HEAL = 1 << 2, 192 ZIO_FLAG_RESILVER = 1 << 3, 193 ZIO_FLAG_SCRUB = 1 << 4, 194 ZIO_FLAG_SCAN_THREAD = 1 << 5, 195 ZIO_FLAG_PHYSICAL = 1 << 6, 196 197 #define ZIO_FLAG_AGG_INHERIT (ZIO_FLAG_CANFAIL - 1) 198 199 /* 200 * Flags inherited by ddt, gang, and vdev children. 201 */ 202 ZIO_FLAG_CANFAIL = 1 << 7, /* must be first for INHERIT */ 203 ZIO_FLAG_SPECULATIVE = 1 << 8, 204 ZIO_FLAG_CONFIG_WRITER = 1 << 9, 205 ZIO_FLAG_DONT_RETRY = 1 << 10, 206 ZIO_FLAG_DONT_CACHE = 1 << 11, 207 ZIO_FLAG_NODATA = 1 << 12, 208 ZIO_FLAG_INDUCE_DAMAGE = 1 << 13, 209 ZIO_FLAG_IO_ALLOCATING = 1 << 14, 210 211 #define ZIO_FLAG_DDT_INHERIT (ZIO_FLAG_IO_RETRY - 1) 212 #define ZIO_FLAG_GANG_INHERIT (ZIO_FLAG_IO_RETRY - 1) 213 214 /* 215 * Flags inherited by vdev children. 216 */ 217 ZIO_FLAG_IO_RETRY = 1 << 15, /* must be first for INHERIT */ 218 ZIO_FLAG_PROBE = 1 << 16, 219 ZIO_FLAG_TRYHARD = 1 << 17, 220 ZIO_FLAG_OPTIONAL = 1 << 18, 221 222 #define ZIO_FLAG_VDEV_INHERIT (ZIO_FLAG_DONT_QUEUE - 1) 223 224 /* 225 * Flags not inherited by any children. 226 */ 227 ZIO_FLAG_DONT_QUEUE = 1 << 19, /* must be first for INHERIT */ 228 ZIO_FLAG_DONT_PROPAGATE = 1 << 20, 229 ZIO_FLAG_IO_BYPASS = 1 << 21, 230 ZIO_FLAG_IO_REWRITE = 1 << 22, 231 ZIO_FLAG_RAW_COMPRESS = 1 << 23, 232 ZIO_FLAG_RAW_ENCRYPT = 1 << 24, 233 ZIO_FLAG_GANG_CHILD = 1 << 25, 234 ZIO_FLAG_DDT_CHILD = 1 << 26, 235 ZIO_FLAG_GODFATHER = 1 << 27, 236 ZIO_FLAG_NOPWRITE = 1 << 28, 237 ZIO_FLAG_REEXECUTED = 1 << 29, 238 ZIO_FLAG_DELEGATED = 1 << 30, 239 ZIO_FLAG_FASTWRITE = 1 << 31, 240 }; 241 242 #define ZIO_FLAG_MUSTSUCCEED 0 243 #define ZIO_FLAG_RAW (ZIO_FLAG_RAW_COMPRESS | ZIO_FLAG_RAW_ENCRYPT) 244 245 #define ZIO_DDT_CHILD_FLAGS(zio) \ 246 (((zio)->io_flags & ZIO_FLAG_DDT_INHERIT) | \ 247 ZIO_FLAG_DDT_CHILD | ZIO_FLAG_CANFAIL) 248 249 #define ZIO_GANG_CHILD_FLAGS(zio) \ 250 (((zio)->io_flags & ZIO_FLAG_GANG_INHERIT) | \ 251 ZIO_FLAG_GANG_CHILD | ZIO_FLAG_CANFAIL) 252 253 #define ZIO_VDEV_CHILD_FLAGS(zio) \ 254 (((zio)->io_flags & ZIO_FLAG_VDEV_INHERIT) | \ 255 ZIO_FLAG_DONT_PROPAGATE | ZIO_FLAG_CANFAIL) 256 257 #define ZIO_CHILD_BIT(x) (1 << (x)) 258 #define ZIO_CHILD_BIT_IS_SET(val, x) ((val) & (1 << (x))) 259 260 enum zio_child { 261 ZIO_CHILD_VDEV = 0, 262 ZIO_CHILD_GANG, 263 ZIO_CHILD_DDT, 264 ZIO_CHILD_LOGICAL, 265 ZIO_CHILD_TYPES 266 }; 267 268 #define ZIO_CHILD_VDEV_BIT ZIO_CHILD_BIT(ZIO_CHILD_VDEV) 269 #define ZIO_CHILD_GANG_BIT ZIO_CHILD_BIT(ZIO_CHILD_GANG) 270 #define ZIO_CHILD_DDT_BIT ZIO_CHILD_BIT(ZIO_CHILD_DDT) 271 #define ZIO_CHILD_LOGICAL_BIT ZIO_CHILD_BIT(ZIO_CHILD_LOGICAL) 272 #define ZIO_CHILD_ALL_BITS \ 273 (ZIO_CHILD_VDEV_BIT | ZIO_CHILD_GANG_BIT | \ 274 ZIO_CHILD_DDT_BIT | ZIO_CHILD_LOGICAL_BIT) 275 276 enum zio_wait_type { 277 ZIO_WAIT_READY = 0, 278 ZIO_WAIT_DONE, 279 ZIO_WAIT_TYPES 280 }; 281 282 typedef void zio_done_func_t(zio_t *zio); 283 284 extern int zio_exclude_metadata; 285 extern int zio_dva_throttle_enabled; 286 extern const char *zio_type_name[ZIO_TYPES]; 287 288 /* 289 * A bookmark is a four-tuple <objset, object, level, blkid> that uniquely 290 * identifies any block in the pool. By convention, the meta-objset (MOS) 291 * is objset 0, and the meta-dnode is object 0. This covers all blocks 292 * except root blocks and ZIL blocks, which are defined as follows: 293 * 294 * Root blocks (objset_phys_t) are object 0, level -1: <objset, 0, -1, 0>. 295 * ZIL blocks are bookmarked <objset, 0, -2, blkid == ZIL sequence number>. 296 * dmu_sync()ed ZIL data blocks are bookmarked <objset, object, -2, blkid>. 297 * dnode visit bookmarks are <objset, object id of dnode, -3, 0>. 298 * 299 * Note: this structure is called a bookmark because its original purpose 300 * was to remember where to resume a pool-wide traverse. 301 * 302 * Note: this structure is passed between userland and the kernel, and is 303 * stored on disk (by virtue of being incorporated into other on-disk 304 * structures, e.g. dsl_scan_phys_t). 305 */ 306 struct zbookmark_phys { 307 uint64_t zb_objset; 308 uint64_t zb_object; 309 int64_t zb_level; 310 uint64_t zb_blkid; 311 }; 312 313 #define SET_BOOKMARK(zb, objset, object, level, blkid) \ 314 { \ 315 (zb)->zb_objset = objset; \ 316 (zb)->zb_object = object; \ 317 (zb)->zb_level = level; \ 318 (zb)->zb_blkid = blkid; \ 319 } 320 321 #define ZB_DESTROYED_OBJSET (-1ULL) 322 323 #define ZB_ROOT_OBJECT (0ULL) 324 #define ZB_ROOT_LEVEL (-1LL) 325 #define ZB_ROOT_BLKID (0ULL) 326 327 #define ZB_ZIL_OBJECT (0ULL) 328 #define ZB_ZIL_LEVEL (-2LL) 329 330 #define ZB_DNODE_LEVEL (-3LL) 331 #define ZB_DNODE_BLKID (0ULL) 332 333 #define ZB_IS_ZERO(zb) \ 334 ((zb)->zb_objset == 0 && (zb)->zb_object == 0 && \ 335 (zb)->zb_level == 0 && (zb)->zb_blkid == 0) 336 #define ZB_IS_ROOT(zb) \ 337 ((zb)->zb_object == ZB_ROOT_OBJECT && \ 338 (zb)->zb_level == ZB_ROOT_LEVEL && \ 339 (zb)->zb_blkid == ZB_ROOT_BLKID) 340 341 typedef struct zio_prop { 342 enum zio_checksum zp_checksum; 343 enum zio_compress zp_compress; 344 uint8_t zp_complevel; 345 dmu_object_type_t zp_type; 346 uint8_t zp_level; 347 uint8_t zp_copies; 348 boolean_t zp_dedup; 349 boolean_t zp_dedup_verify; 350 boolean_t zp_nopwrite; 351 boolean_t zp_encrypt; 352 boolean_t zp_byteorder; 353 uint8_t zp_salt[ZIO_DATA_SALT_LEN]; 354 uint8_t zp_iv[ZIO_DATA_IV_LEN]; 355 uint8_t zp_mac[ZIO_DATA_MAC_LEN]; 356 uint32_t zp_zpl_smallblk; 357 } zio_prop_t; 358 359 typedef struct zio_cksum_report zio_cksum_report_t; 360 361 typedef void zio_cksum_finish_f(zio_cksum_report_t *rep, 362 const abd_t *good_data); 363 typedef void zio_cksum_free_f(void *cbdata, size_t size); 364 365 struct zio_bad_cksum; /* defined in zio_checksum.h */ 366 struct dnode_phys; 367 struct abd; 368 369 struct zio_cksum_report { 370 struct zio_cksum_report *zcr_next; 371 nvlist_t *zcr_ereport; 372 nvlist_t *zcr_detector; 373 void *zcr_cbdata; 374 size_t zcr_cbinfo; /* passed to zcr_free() */ 375 uint64_t zcr_sector; 376 uint64_t zcr_align; 377 uint64_t zcr_length; 378 zio_cksum_finish_f *zcr_finish; 379 zio_cksum_free_f *zcr_free; 380 381 /* internal use only */ 382 struct zio_bad_cksum *zcr_ckinfo; /* information from failure */ 383 }; 384 385 typedef void zio_vsd_cksum_report_f(zio_t *zio, zio_cksum_report_t *zcr, 386 void *arg); 387 388 zio_vsd_cksum_report_f zio_vsd_default_cksum_report; 389 390 typedef struct zio_vsd_ops { 391 zio_done_func_t *vsd_free; 392 zio_vsd_cksum_report_f *vsd_cksum_report; 393 } zio_vsd_ops_t; 394 395 typedef struct zio_gang_node { 396 zio_gbh_phys_t *gn_gbh; 397 struct zio_gang_node *gn_child[SPA_GBH_NBLKPTRS]; 398 } zio_gang_node_t; 399 400 typedef zio_t *zio_gang_issue_func_t(zio_t *zio, blkptr_t *bp, 401 zio_gang_node_t *gn, struct abd *data, uint64_t offset); 402 403 typedef void zio_transform_func_t(zio_t *zio, struct abd *data, uint64_t size); 404 405 typedef struct zio_transform { 406 struct abd *zt_orig_abd; 407 uint64_t zt_orig_size; 408 uint64_t zt_bufsize; 409 zio_transform_func_t *zt_transform; 410 struct zio_transform *zt_next; 411 } zio_transform_t; 412 413 typedef zio_t *zio_pipe_stage_t(zio_t *zio); 414 415 /* 416 * The io_reexecute flags are distinct from io_flags because the child must 417 * be able to propagate them to the parent. The normal io_flags are local 418 * to the zio, not protected by any lock, and not modifiable by children; 419 * the reexecute flags are protected by io_lock, modifiable by children, 420 * and always propagated -- even when ZIO_FLAG_DONT_PROPAGATE is set. 421 */ 422 #define ZIO_REEXECUTE_NOW 0x01 423 #define ZIO_REEXECUTE_SUSPEND 0x02 424 425 /* 426 * The io_trim flags are used to specify the type of TRIM to perform. They 427 * only apply to ZIO_TYPE_TRIM zios are distinct from io_flags. 428 */ 429 enum trim_flag { 430 ZIO_TRIM_SECURE = 1 << 0, 431 }; 432 433 typedef struct zio_alloc_list { 434 list_t zal_list; 435 uint64_t zal_size; 436 } zio_alloc_list_t; 437 438 typedef struct zio_link { 439 zio_t *zl_parent; 440 zio_t *zl_child; 441 list_node_t zl_parent_node; 442 list_node_t zl_child_node; 443 } zio_link_t; 444 445 struct zio { 446 /* Core information about this I/O */ 447 zbookmark_phys_t io_bookmark; 448 zio_prop_t io_prop; 449 zio_type_t io_type; 450 enum zio_child io_child_type; 451 enum trim_flag io_trim_flags; 452 int io_cmd; 453 zio_priority_t io_priority; 454 uint8_t io_reexecute; 455 uint8_t io_state[ZIO_WAIT_TYPES]; 456 uint64_t io_txg; 457 spa_t *io_spa; 458 blkptr_t *io_bp; 459 blkptr_t *io_bp_override; 460 blkptr_t io_bp_copy; 461 list_t io_parent_list; 462 list_t io_child_list; 463 zio_t *io_logical; 464 zio_transform_t *io_transform_stack; 465 466 /* Callback info */ 467 zio_done_func_t *io_ready; 468 zio_done_func_t *io_children_ready; 469 zio_done_func_t *io_physdone; 470 zio_done_func_t *io_done; 471 void *io_private; 472 int64_t io_prev_space_delta; /* DMU private */ 473 blkptr_t io_bp_orig; 474 /* io_lsize != io_orig_size iff this is a raw write */ 475 uint64_t io_lsize; 476 477 /* Data represented by this I/O */ 478 struct abd *io_abd; 479 struct abd *io_orig_abd; 480 uint64_t io_size; 481 uint64_t io_orig_size; 482 483 /* Stuff for the vdev stack */ 484 vdev_t *io_vd; 485 void *io_vsd; 486 const zio_vsd_ops_t *io_vsd_ops; 487 metaslab_class_t *io_metaslab_class; /* dva throttle class */ 488 489 uint64_t io_offset; 490 hrtime_t io_timestamp; /* submitted at */ 491 hrtime_t io_queued_timestamp; 492 hrtime_t io_target_timestamp; 493 hrtime_t io_delta; /* vdev queue service delta */ 494 hrtime_t io_delay; /* Device access time (disk or */ 495 /* file). */ 496 avl_node_t io_queue_node; 497 avl_node_t io_offset_node; 498 avl_node_t io_alloc_node; 499 zio_alloc_list_t io_alloc_list; 500 501 /* Internal pipeline state */ 502 enum zio_flag io_flags; 503 enum zio_stage io_stage; 504 enum zio_stage io_pipeline; 505 enum zio_flag io_orig_flags; 506 enum zio_stage io_orig_stage; 507 enum zio_stage io_orig_pipeline; 508 enum zio_stage io_pipeline_trace; 509 int io_error; 510 int io_child_error[ZIO_CHILD_TYPES]; 511 uint64_t io_children[ZIO_CHILD_TYPES][ZIO_WAIT_TYPES]; 512 uint64_t io_child_count; 513 uint64_t io_phys_children; 514 uint64_t io_parent_count; 515 uint64_t *io_stall; 516 zio_t *io_gang_leader; 517 zio_gang_node_t *io_gang_tree; 518 void *io_executor; 519 void *io_waiter; 520 void *io_bio; 521 kmutex_t io_lock; 522 kcondvar_t io_cv; 523 int io_allocator; 524 525 /* FMA state */ 526 zio_cksum_report_t *io_cksum_report; 527 uint64_t io_ena; 528 529 /* Taskq dispatching state */ 530 taskq_ent_t io_tqent; 531 }; 532 533 enum blk_verify_flag { 534 BLK_VERIFY_ONLY, 535 BLK_VERIFY_LOG, 536 BLK_VERIFY_HALT 537 }; 538 539 extern int zio_bookmark_compare(const void *, const void *); 540 541 extern zio_t *zio_null(zio_t *pio, spa_t *spa, vdev_t *vd, 542 zio_done_func_t *done, void *priv, enum zio_flag flags); 543 544 extern zio_t *zio_root(spa_t *spa, 545 zio_done_func_t *done, void *priv, enum zio_flag flags); 546 547 extern zio_t *zio_read(zio_t *pio, spa_t *spa, const blkptr_t *bp, 548 struct abd *data, uint64_t lsize, zio_done_func_t *done, void *priv, 549 zio_priority_t priority, enum zio_flag flags, const zbookmark_phys_t *zb); 550 551 extern zio_t *zio_write(zio_t *pio, spa_t *spa, uint64_t txg, blkptr_t *bp, 552 struct abd *data, uint64_t size, uint64_t psize, const zio_prop_t *zp, 553 zio_done_func_t *ready, zio_done_func_t *children_ready, 554 zio_done_func_t *physdone, zio_done_func_t *done, 555 void *priv, zio_priority_t priority, enum zio_flag flags, 556 const zbookmark_phys_t *zb); 557 558 extern zio_t *zio_rewrite(zio_t *pio, spa_t *spa, uint64_t txg, blkptr_t *bp, 559 struct abd *data, uint64_t size, zio_done_func_t *done, void *priv, 560 zio_priority_t priority, enum zio_flag flags, zbookmark_phys_t *zb); 561 562 extern void zio_write_override(zio_t *zio, blkptr_t *bp, int copies, 563 boolean_t nopwrite); 564 565 extern void zio_free(spa_t *spa, uint64_t txg, const blkptr_t *bp); 566 567 extern zio_t *zio_claim(zio_t *pio, spa_t *spa, uint64_t txg, 568 const blkptr_t *bp, 569 zio_done_func_t *done, void *priv, enum zio_flag flags); 570 571 extern zio_t *zio_ioctl(zio_t *pio, spa_t *spa, vdev_t *vd, int cmd, 572 zio_done_func_t *done, void *priv, enum zio_flag flags); 573 574 extern zio_t *zio_trim(zio_t *pio, vdev_t *vd, uint64_t offset, uint64_t size, 575 zio_done_func_t *done, void *priv, zio_priority_t priority, 576 enum zio_flag flags, enum trim_flag trim_flags); 577 578 extern zio_t *zio_read_phys(zio_t *pio, vdev_t *vd, uint64_t offset, 579 uint64_t size, struct abd *data, int checksum, 580 zio_done_func_t *done, void *priv, zio_priority_t priority, 581 enum zio_flag flags, boolean_t labels); 582 583 extern zio_t *zio_write_phys(zio_t *pio, vdev_t *vd, uint64_t offset, 584 uint64_t size, struct abd *data, int checksum, 585 zio_done_func_t *done, void *priv, zio_priority_t priority, 586 enum zio_flag flags, boolean_t labels); 587 588 extern zio_t *zio_free_sync(zio_t *pio, spa_t *spa, uint64_t txg, 589 const blkptr_t *bp, enum zio_flag flags); 590 591 extern int zio_alloc_zil(spa_t *spa, objset_t *os, uint64_t txg, 592 blkptr_t *new_bp, uint64_t size, boolean_t *slog); 593 extern void zio_flush(zio_t *zio, vdev_t *vd); 594 extern void zio_shrink(zio_t *zio, uint64_t size); 595 596 extern int zio_wait(zio_t *zio); 597 extern void zio_nowait(zio_t *zio); 598 extern void zio_execute(zio_t *zio); 599 extern void zio_interrupt(zio_t *zio); 600 extern void zio_delay_init(zio_t *zio); 601 extern void zio_delay_interrupt(zio_t *zio); 602 extern void zio_deadman(zio_t *zio, char *tag); 603 604 extern zio_t *zio_walk_parents(zio_t *cio, zio_link_t **); 605 extern zio_t *zio_walk_children(zio_t *pio, zio_link_t **); 606 extern zio_t *zio_unique_parent(zio_t *cio); 607 extern void zio_add_child(zio_t *pio, zio_t *cio); 608 609 extern void *zio_buf_alloc(size_t size); 610 extern void zio_buf_free(void *buf, size_t size); 611 extern void *zio_data_buf_alloc(size_t size); 612 extern void zio_data_buf_free(void *buf, size_t size); 613 614 extern void zio_push_transform(zio_t *zio, struct abd *abd, uint64_t size, 615 uint64_t bufsize, zio_transform_func_t *transform); 616 extern void zio_pop_transforms(zio_t *zio); 617 618 extern void zio_resubmit_stage_async(void *); 619 620 extern zio_t *zio_vdev_child_io(zio_t *zio, blkptr_t *bp, vdev_t *vd, 621 uint64_t offset, struct abd *data, uint64_t size, int type, 622 zio_priority_t priority, enum zio_flag flags, 623 zio_done_func_t *done, void *priv); 624 625 extern zio_t *zio_vdev_delegated_io(vdev_t *vd, uint64_t offset, 626 struct abd *data, uint64_t size, zio_type_t type, zio_priority_t priority, 627 enum zio_flag flags, zio_done_func_t *done, void *priv); 628 629 extern void zio_vdev_io_bypass(zio_t *zio); 630 extern void zio_vdev_io_reissue(zio_t *zio); 631 extern void zio_vdev_io_redone(zio_t *zio); 632 633 extern void zio_change_priority(zio_t *pio, zio_priority_t priority); 634 635 extern void zio_checksum_verified(zio_t *zio); 636 extern int zio_worst_error(int e1, int e2); 637 638 extern enum zio_checksum zio_checksum_select(enum zio_checksum child, 639 enum zio_checksum parent); 640 extern enum zio_checksum zio_checksum_dedup_select(spa_t *spa, 641 enum zio_checksum child, enum zio_checksum parent); 642 extern enum zio_compress zio_compress_select(spa_t *spa, 643 enum zio_compress child, enum zio_compress parent); 644 extern uint8_t zio_complevel_select(spa_t *spa, enum zio_compress compress, 645 uint8_t child, uint8_t parent); 646 647 extern void zio_suspend(spa_t *spa, zio_t *zio, zio_suspend_reason_t); 648 extern int zio_resume(spa_t *spa); 649 extern void zio_resume_wait(spa_t *spa); 650 651 extern boolean_t zfs_blkptr_verify(spa_t *spa, const blkptr_t *bp, 652 boolean_t config_held, enum blk_verify_flag blk_verify); 653 654 /* 655 * Initial setup and teardown. 656 */ 657 extern void zio_init(void); 658 extern void zio_fini(void); 659 660 /* 661 * Fault injection 662 */ 663 struct zinject_record; 664 extern uint32_t zio_injection_enabled; 665 extern int zio_inject_fault(char *name, int flags, int *id, 666 struct zinject_record *record); 667 extern int zio_inject_list_next(int *id, char *name, size_t buflen, 668 struct zinject_record *record); 669 extern int zio_clear_fault(int id); 670 extern void zio_handle_panic_injection(spa_t *spa, char *tag, uint64_t type); 671 extern int zio_handle_decrypt_injection(spa_t *spa, const zbookmark_phys_t *zb, 672 uint64_t type, int error); 673 extern int zio_handle_fault_injection(zio_t *zio, int error); 674 extern int zio_handle_device_injection(vdev_t *vd, zio_t *zio, int error); 675 extern int zio_handle_device_injections(vdev_t *vd, zio_t *zio, int err1, 676 int err2); 677 extern int zio_handle_label_injection(zio_t *zio, int error); 678 extern void zio_handle_ignored_writes(zio_t *zio); 679 extern hrtime_t zio_handle_io_delay(zio_t *zio); 680 681 /* 682 * Checksum ereport functions 683 */ 684 extern int zfs_ereport_start_checksum(spa_t *spa, vdev_t *vd, 685 const zbookmark_phys_t *zb, struct zio *zio, uint64_t offset, 686 uint64_t length, void *arg, struct zio_bad_cksum *info); 687 extern void zfs_ereport_finish_checksum(zio_cksum_report_t *report, 688 const abd_t *good_data, const abd_t *bad_data, boolean_t drop_if_identical); 689 690 extern void zfs_ereport_free_checksum(zio_cksum_report_t *report); 691 692 /* If we have the good data in hand, this function can be used */ 693 extern int zfs_ereport_post_checksum(spa_t *spa, vdev_t *vd, 694 const zbookmark_phys_t *zb, struct zio *zio, uint64_t offset, 695 uint64_t length, const abd_t *good_data, const abd_t *bad_data, 696 struct zio_bad_cksum *info); 697 698 /* Called from spa_sync(), but primarily an injection handler */ 699 extern void spa_handle_ignored_writes(spa_t *spa); 700 701 /* zbookmark_phys functions */ 702 boolean_t zbookmark_subtree_completed(const struct dnode_phys *dnp, 703 const zbookmark_phys_t *subtree_root, const zbookmark_phys_t *last_block); 704 int zbookmark_compare(uint16_t dbss1, uint8_t ibs1, uint16_t dbss2, 705 uint8_t ibs2, const zbookmark_phys_t *zb1, const zbookmark_phys_t *zb2); 706 707 #ifdef __cplusplus 708 } 709 #endif 710 711 #endif /* _ZIO_H */ 712