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 <tsoome@me.com> 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 ZIO_CHECKSUM_EDONR, 92 ZIO_CHECKSUM_BLAKE3, 93 ZIO_CHECKSUM_FUNCTIONS 94 }; 95 96 /* 97 * The number of "legacy" compression functions which can be set on individual 98 * objects. 99 */ 100 #define ZIO_CHECKSUM_LEGACY_FUNCTIONS ZIO_CHECKSUM_ZILOG2 101 102 #define ZIO_CHECKSUM_ON_VALUE ZIO_CHECKSUM_FLETCHER_4 103 #define ZIO_CHECKSUM_DEFAULT ZIO_CHECKSUM_ON 104 105 #define ZIO_CHECKSUM_MASK 0xffULL 106 #define ZIO_CHECKSUM_VERIFY (1U << 8) 107 108 #define ZIO_DEDUPCHECKSUM ZIO_CHECKSUM_SHA256 109 110 /* macros defining encryption lengths */ 111 #define ZIO_OBJSET_MAC_LEN 32 112 #define ZIO_DATA_IV_LEN 12 113 #define ZIO_DATA_SALT_LEN 8 114 #define ZIO_DATA_MAC_LEN 16 115 116 /* 117 * The number of "legacy" compression functions which can be set on individual 118 * objects. 119 */ 120 #define ZIO_COMPRESS_LEGACY_FUNCTIONS ZIO_COMPRESS_LZ4 121 122 /* 123 * The meaning of "compress = on" selected by the compression features enabled 124 * on a given pool. 125 */ 126 #define ZIO_COMPRESS_LEGACY_ON_VALUE ZIO_COMPRESS_LZJB 127 #define ZIO_COMPRESS_LZ4_ON_VALUE ZIO_COMPRESS_LZ4 128 129 #define ZIO_COMPRESS_DEFAULT ZIO_COMPRESS_ON 130 131 #define BOOTFS_COMPRESS_VALID(compress) \ 132 ((compress) == ZIO_COMPRESS_LZJB || \ 133 (compress) == ZIO_COMPRESS_LZ4 || \ 134 (compress) == ZIO_COMPRESS_GZIP_1 || \ 135 (compress) == ZIO_COMPRESS_GZIP_2 || \ 136 (compress) == ZIO_COMPRESS_GZIP_3 || \ 137 (compress) == ZIO_COMPRESS_GZIP_4 || \ 138 (compress) == ZIO_COMPRESS_GZIP_5 || \ 139 (compress) == ZIO_COMPRESS_GZIP_6 || \ 140 (compress) == ZIO_COMPRESS_GZIP_7 || \ 141 (compress) == ZIO_COMPRESS_GZIP_8 || \ 142 (compress) == ZIO_COMPRESS_GZIP_9 || \ 143 (compress) == ZIO_COMPRESS_ZLE || \ 144 (compress) == ZIO_COMPRESS_ZSTD || \ 145 (compress) == ZIO_COMPRESS_ON || \ 146 (compress) == ZIO_COMPRESS_OFF) 147 148 149 #define ZIO_COMPRESS_ALGO(x) (x & SPA_COMPRESSMASK) 150 #define ZIO_COMPRESS_LEVEL(x) ((x & ~SPA_COMPRESSMASK) >> SPA_COMPRESSBITS) 151 #define ZIO_COMPRESS_RAW(type, level) (type | ((level) << SPA_COMPRESSBITS)) 152 153 #define ZIO_COMPLEVEL_ZSTD(level) \ 154 ZIO_COMPRESS_RAW(ZIO_COMPRESS_ZSTD, level) 155 156 #define ZIO_FAILURE_MODE_WAIT 0 157 #define ZIO_FAILURE_MODE_CONTINUE 1 158 #define ZIO_FAILURE_MODE_PANIC 2 159 160 typedef enum zio_suspend_reason { 161 ZIO_SUSPEND_NONE = 0, 162 ZIO_SUSPEND_IOERR, 163 ZIO_SUSPEND_MMP, 164 } zio_suspend_reason_t; 165 166 enum zio_flag { 167 /* 168 * Flags inherited by gang, ddt, and vdev children, 169 * and that must be equal for two zios to aggregate 170 */ 171 ZIO_FLAG_DONT_AGGREGATE = 1U << 0, 172 ZIO_FLAG_IO_REPAIR = 1U << 1, 173 ZIO_FLAG_SELF_HEAL = 1U << 2, 174 ZIO_FLAG_RESILVER = 1U << 3, 175 ZIO_FLAG_SCRUB = 1U << 4, 176 ZIO_FLAG_SCAN_THREAD = 1U << 5, 177 ZIO_FLAG_PHYSICAL = 1U << 6, 178 179 #define ZIO_FLAG_AGG_INHERIT (ZIO_FLAG_CANFAIL - 1) 180 181 /* 182 * Flags inherited by ddt, gang, and vdev children. 183 */ 184 ZIO_FLAG_CANFAIL = 1U << 7, /* must be first for INHERIT */ 185 ZIO_FLAG_SPECULATIVE = 1U << 8, 186 ZIO_FLAG_CONFIG_WRITER = 1U << 9, 187 ZIO_FLAG_DONT_RETRY = 1U << 10, 188 ZIO_FLAG_DONT_CACHE = 1U << 11, 189 ZIO_FLAG_NODATA = 1U << 12, 190 ZIO_FLAG_INDUCE_DAMAGE = 1U << 13, 191 ZIO_FLAG_IO_ALLOCATING = 1U << 14, 192 193 #define ZIO_FLAG_DDT_INHERIT (ZIO_FLAG_IO_RETRY - 1) 194 #define ZIO_FLAG_GANG_INHERIT (ZIO_FLAG_IO_RETRY - 1) 195 196 /* 197 * Flags inherited by vdev children. 198 */ 199 ZIO_FLAG_IO_RETRY = 1U << 15, /* must be first for INHERIT */ 200 ZIO_FLAG_PROBE = 1U << 16, 201 ZIO_FLAG_TRYHARD = 1U << 17, 202 ZIO_FLAG_OPTIONAL = 1U << 18, 203 204 #define ZIO_FLAG_VDEV_INHERIT (ZIO_FLAG_DONT_QUEUE - 1) 205 206 /* 207 * Flags not inherited by any children. 208 */ 209 ZIO_FLAG_DONT_QUEUE = 1U << 19, /* must be first for INHERIT */ 210 ZIO_FLAG_DONT_PROPAGATE = 1U << 20, 211 ZIO_FLAG_IO_BYPASS = 1U << 21, 212 ZIO_FLAG_IO_REWRITE = 1U << 22, 213 ZIO_FLAG_RAW_COMPRESS = 1U << 23, 214 ZIO_FLAG_RAW_ENCRYPT = 1U << 24, 215 ZIO_FLAG_GANG_CHILD = 1U << 25, 216 ZIO_FLAG_DDT_CHILD = 1U << 26, 217 ZIO_FLAG_GODFATHER = 1U << 27, 218 ZIO_FLAG_NOPWRITE = 1U << 28, 219 ZIO_FLAG_REEXECUTED = 1U << 29, 220 ZIO_FLAG_DELEGATED = 1U << 30, 221 ZIO_FLAG_FASTWRITE = 1U << 31, 222 }; 223 224 #define ZIO_FLAG_MUSTSUCCEED 0 225 #define ZIO_FLAG_RAW (ZIO_FLAG_RAW_COMPRESS | ZIO_FLAG_RAW_ENCRYPT) 226 227 #define ZIO_DDT_CHILD_FLAGS(zio) \ 228 (((zio)->io_flags & ZIO_FLAG_DDT_INHERIT) | \ 229 ZIO_FLAG_DDT_CHILD | ZIO_FLAG_CANFAIL) 230 231 #define ZIO_GANG_CHILD_FLAGS(zio) \ 232 (((zio)->io_flags & ZIO_FLAG_GANG_INHERIT) | \ 233 ZIO_FLAG_GANG_CHILD | ZIO_FLAG_CANFAIL) 234 235 #define ZIO_VDEV_CHILD_FLAGS(zio) \ 236 (((zio)->io_flags & ZIO_FLAG_VDEV_INHERIT) | \ 237 ZIO_FLAG_DONT_PROPAGATE | ZIO_FLAG_CANFAIL) 238 239 #define ZIO_CHILD_BIT(x) (1U << (x)) 240 #define ZIO_CHILD_BIT_IS_SET(val, x) ((val) & (1U << (x))) 241 242 enum zio_child { 243 ZIO_CHILD_VDEV = 0, 244 ZIO_CHILD_GANG, 245 ZIO_CHILD_DDT, 246 ZIO_CHILD_LOGICAL, 247 ZIO_CHILD_TYPES 248 }; 249 250 #define ZIO_CHILD_VDEV_BIT ZIO_CHILD_BIT(ZIO_CHILD_VDEV) 251 #define ZIO_CHILD_GANG_BIT ZIO_CHILD_BIT(ZIO_CHILD_GANG) 252 #define ZIO_CHILD_DDT_BIT ZIO_CHILD_BIT(ZIO_CHILD_DDT) 253 #define ZIO_CHILD_LOGICAL_BIT ZIO_CHILD_BIT(ZIO_CHILD_LOGICAL) 254 #define ZIO_CHILD_ALL_BITS \ 255 (ZIO_CHILD_VDEV_BIT | ZIO_CHILD_GANG_BIT | \ 256 ZIO_CHILD_DDT_BIT | ZIO_CHILD_LOGICAL_BIT) 257 258 enum zio_wait_type { 259 ZIO_WAIT_READY = 0, 260 ZIO_WAIT_DONE, 261 ZIO_WAIT_TYPES 262 }; 263 264 typedef void zio_done_func_t(zio_t *zio); 265 266 extern int zio_exclude_metadata; 267 extern int zio_dva_throttle_enabled; 268 extern const char *const zio_type_name[ZIO_TYPES]; 269 270 /* 271 * A bookmark is a four-tuple <objset, object, level, blkid> that uniquely 272 * identifies any block in the pool. By convention, the meta-objset (MOS) 273 * is objset 0, and the meta-dnode is object 0. This covers all blocks 274 * except root blocks and ZIL blocks, which are defined as follows: 275 * 276 * Root blocks (objset_phys_t) are object 0, level -1: <objset, 0, -1, 0>. 277 * ZIL blocks are bookmarked <objset, 0, -2, blkid == ZIL sequence number>. 278 * dmu_sync()ed ZIL data blocks are bookmarked <objset, object, -2, blkid>. 279 * dnode visit bookmarks are <objset, object id of dnode, -3, 0>. 280 * 281 * Note: this structure is called a bookmark because its original purpose 282 * was to remember where to resume a pool-wide traverse. 283 * 284 * Note: this structure is passed between userland and the kernel, and is 285 * stored on disk (by virtue of being incorporated into other on-disk 286 * structures, e.g. dsl_scan_phys_t). 287 * 288 * If the head_errlog feature is enabled a different on-disk format for error 289 * logs is used. This introduces the use of an error bookmark, a four-tuple 290 * <object, level, blkid, birth> that uniquely identifies any error block 291 * in the pool. The birth transaction group is used to track whether the block 292 * has been overwritten by newer data or added to a snapshot since its marking 293 * as an error. 294 */ 295 struct zbookmark_phys { 296 uint64_t zb_objset; 297 uint64_t zb_object; 298 int64_t zb_level; 299 uint64_t zb_blkid; 300 }; 301 302 typedef struct zbookmark_err_phys { 303 uint64_t zb_object; 304 int64_t zb_level; 305 uint64_t zb_blkid; 306 uint64_t zb_birth; 307 } zbookmark_err_phys_t; 308 309 #define SET_BOOKMARK(zb, objset, object, level, blkid) \ 310 { \ 311 (zb)->zb_objset = objset; \ 312 (zb)->zb_object = object; \ 313 (zb)->zb_level = level; \ 314 (zb)->zb_blkid = blkid; \ 315 } 316 317 #define ZB_DESTROYED_OBJSET (-1ULL) 318 319 #define ZB_ROOT_OBJECT (0ULL) 320 #define ZB_ROOT_LEVEL (-1LL) 321 #define ZB_ROOT_BLKID (0ULL) 322 323 #define ZB_ZIL_OBJECT (0ULL) 324 #define ZB_ZIL_LEVEL (-2LL) 325 326 #define ZB_DNODE_LEVEL (-3LL) 327 #define ZB_DNODE_BLKID (0ULL) 328 329 #define ZB_IS_ZERO(zb) \ 330 ((zb)->zb_objset == 0 && (zb)->zb_object == 0 && \ 331 (zb)->zb_level == 0 && (zb)->zb_blkid == 0) 332 #define ZB_IS_ROOT(zb) \ 333 ((zb)->zb_object == ZB_ROOT_OBJECT && \ 334 (zb)->zb_level == ZB_ROOT_LEVEL && \ 335 (zb)->zb_blkid == ZB_ROOT_BLKID) 336 337 typedef struct zio_prop { 338 enum zio_checksum zp_checksum; 339 enum zio_compress zp_compress; 340 uint8_t zp_complevel; 341 dmu_object_type_t zp_type; 342 uint8_t zp_level; 343 uint8_t zp_copies; 344 boolean_t zp_dedup; 345 boolean_t zp_dedup_verify; 346 boolean_t zp_nopwrite; 347 boolean_t zp_encrypt; 348 boolean_t zp_byteorder; 349 uint8_t zp_salt[ZIO_DATA_SALT_LEN]; 350 uint8_t zp_iv[ZIO_DATA_IV_LEN]; 351 uint8_t zp_mac[ZIO_DATA_MAC_LEN]; 352 uint32_t zp_zpl_smallblk; 353 } zio_prop_t; 354 355 typedef struct zio_cksum_report zio_cksum_report_t; 356 357 typedef void zio_cksum_finish_f(zio_cksum_report_t *rep, 358 const abd_t *good_data); 359 typedef void zio_cksum_free_f(void *cbdata, size_t size); 360 361 struct zio_bad_cksum; /* defined in zio_checksum.h */ 362 struct dnode_phys; 363 struct abd; 364 365 struct zio_cksum_report { 366 struct zio_cksum_report *zcr_next; 367 nvlist_t *zcr_ereport; 368 nvlist_t *zcr_detector; 369 void *zcr_cbdata; 370 size_t zcr_cbinfo; /* passed to zcr_free() */ 371 uint64_t zcr_sector; 372 uint64_t zcr_align; 373 uint64_t zcr_length; 374 zio_cksum_finish_f *zcr_finish; 375 zio_cksum_free_f *zcr_free; 376 377 /* internal use only */ 378 struct zio_bad_cksum *zcr_ckinfo; /* information from failure */ 379 }; 380 381 typedef struct zio_vsd_ops { 382 zio_done_func_t *vsd_free; 383 } zio_vsd_ops_t; 384 385 typedef struct zio_gang_node { 386 zio_gbh_phys_t *gn_gbh; 387 struct zio_gang_node *gn_child[SPA_GBH_NBLKPTRS]; 388 } zio_gang_node_t; 389 390 typedef zio_t *zio_gang_issue_func_t(zio_t *zio, blkptr_t *bp, 391 zio_gang_node_t *gn, struct abd *data, uint64_t offset); 392 393 typedef void zio_transform_func_t(zio_t *zio, struct abd *data, uint64_t size); 394 395 typedef struct zio_transform { 396 struct abd *zt_orig_abd; 397 uint64_t zt_orig_size; 398 uint64_t zt_bufsize; 399 zio_transform_func_t *zt_transform; 400 struct zio_transform *zt_next; 401 } zio_transform_t; 402 403 typedef zio_t *zio_pipe_stage_t(zio_t *zio); 404 405 /* 406 * The io_reexecute flags are distinct from io_flags because the child must 407 * be able to propagate them to the parent. The normal io_flags are local 408 * to the zio, not protected by any lock, and not modifiable by children; 409 * the reexecute flags are protected by io_lock, modifiable by children, 410 * and always propagated -- even when ZIO_FLAG_DONT_PROPAGATE is set. 411 */ 412 #define ZIO_REEXECUTE_NOW 0x01 413 #define ZIO_REEXECUTE_SUSPEND 0x02 414 415 /* 416 * The io_trim flags are used to specify the type of TRIM to perform. They 417 * only apply to ZIO_TYPE_TRIM zios are distinct from io_flags. 418 */ 419 enum trim_flag { 420 ZIO_TRIM_SECURE = 1U << 0, 421 }; 422 423 typedef struct zio_alloc_list { 424 list_t zal_list; 425 uint64_t zal_size; 426 } zio_alloc_list_t; 427 428 typedef struct zio_link { 429 zio_t *zl_parent; 430 zio_t *zl_child; 431 list_node_t zl_parent_node; 432 list_node_t zl_child_node; 433 } zio_link_t; 434 435 struct zio { 436 /* Core information about this I/O */ 437 zbookmark_phys_t io_bookmark; 438 zio_prop_t io_prop; 439 zio_type_t io_type; 440 enum zio_child io_child_type; 441 enum trim_flag io_trim_flags; 442 int io_cmd; 443 zio_priority_t io_priority; 444 uint8_t io_reexecute; 445 uint8_t io_state[ZIO_WAIT_TYPES]; 446 uint64_t io_txg; 447 spa_t *io_spa; 448 blkptr_t *io_bp; 449 blkptr_t *io_bp_override; 450 blkptr_t io_bp_copy; 451 list_t io_parent_list; 452 list_t io_child_list; 453 zio_t *io_logical; 454 zio_transform_t *io_transform_stack; 455 456 /* Callback info */ 457 zio_done_func_t *io_ready; 458 zio_done_func_t *io_children_ready; 459 zio_done_func_t *io_physdone; 460 zio_done_func_t *io_done; 461 void *io_private; 462 int64_t io_prev_space_delta; /* DMU private */ 463 blkptr_t io_bp_orig; 464 /* io_lsize != io_orig_size iff this is a raw write */ 465 uint64_t io_lsize; 466 467 /* Data represented by this I/O */ 468 struct abd *io_abd; 469 struct abd *io_orig_abd; 470 uint64_t io_size; 471 uint64_t io_orig_size; 472 473 /* Stuff for the vdev stack */ 474 vdev_t *io_vd; 475 void *io_vsd; 476 const zio_vsd_ops_t *io_vsd_ops; 477 metaslab_class_t *io_metaslab_class; /* dva throttle class */ 478 479 uint64_t io_offset; 480 hrtime_t io_timestamp; /* submitted at */ 481 hrtime_t io_queued_timestamp; 482 hrtime_t io_target_timestamp; 483 hrtime_t io_delta; /* vdev queue service delta */ 484 hrtime_t io_delay; /* Device access time (disk or */ 485 /* file). */ 486 avl_node_t io_queue_node; 487 avl_node_t io_offset_node; 488 avl_node_t io_alloc_node; 489 zio_alloc_list_t io_alloc_list; 490 491 /* Internal pipeline state */ 492 enum zio_flag io_flags; 493 enum zio_stage io_stage; 494 enum zio_stage io_pipeline; 495 enum zio_flag io_orig_flags; 496 enum zio_stage io_orig_stage; 497 enum zio_stage io_orig_pipeline; 498 enum zio_stage io_pipeline_trace; 499 int io_error; 500 int io_child_error[ZIO_CHILD_TYPES]; 501 uint64_t io_children[ZIO_CHILD_TYPES][ZIO_WAIT_TYPES]; 502 uint64_t io_child_count; 503 uint64_t io_phys_children; 504 uint64_t io_parent_count; 505 uint64_t *io_stall; 506 zio_t *io_gang_leader; 507 zio_gang_node_t *io_gang_tree; 508 void *io_executor; 509 void *io_waiter; 510 void *io_bio; 511 kmutex_t io_lock; 512 kcondvar_t io_cv; 513 int io_allocator; 514 515 /* FMA state */ 516 zio_cksum_report_t *io_cksum_report; 517 uint64_t io_ena; 518 519 /* Taskq dispatching state */ 520 taskq_ent_t io_tqent; 521 }; 522 523 enum blk_verify_flag { 524 BLK_VERIFY_ONLY, 525 BLK_VERIFY_LOG, 526 BLK_VERIFY_HALT 527 }; 528 529 extern int zio_bookmark_compare(const void *, const void *); 530 531 extern zio_t *zio_null(zio_t *pio, spa_t *spa, vdev_t *vd, 532 zio_done_func_t *done, void *priv, enum zio_flag flags); 533 534 extern zio_t *zio_root(spa_t *spa, 535 zio_done_func_t *done, void *priv, enum zio_flag flags); 536 537 extern zio_t *zio_read(zio_t *pio, spa_t *spa, const blkptr_t *bp, 538 struct abd *data, uint64_t lsize, zio_done_func_t *done, void *priv, 539 zio_priority_t priority, enum zio_flag flags, const zbookmark_phys_t *zb); 540 541 extern zio_t *zio_write(zio_t *pio, spa_t *spa, uint64_t txg, blkptr_t *bp, 542 struct abd *data, uint64_t size, uint64_t psize, const zio_prop_t *zp, 543 zio_done_func_t *ready, zio_done_func_t *children_ready, 544 zio_done_func_t *physdone, zio_done_func_t *done, 545 void *priv, zio_priority_t priority, enum zio_flag flags, 546 const zbookmark_phys_t *zb); 547 548 extern zio_t *zio_rewrite(zio_t *pio, spa_t *spa, uint64_t txg, blkptr_t *bp, 549 struct abd *data, uint64_t size, zio_done_func_t *done, void *priv, 550 zio_priority_t priority, enum zio_flag flags, zbookmark_phys_t *zb); 551 552 extern void zio_write_override(zio_t *zio, blkptr_t *bp, int copies, 553 boolean_t nopwrite); 554 555 extern void zio_free(spa_t *spa, uint64_t txg, const blkptr_t *bp); 556 557 extern zio_t *zio_claim(zio_t *pio, spa_t *spa, uint64_t txg, 558 const blkptr_t *bp, 559 zio_done_func_t *done, void *priv, enum zio_flag flags); 560 561 extern zio_t *zio_ioctl(zio_t *pio, spa_t *spa, vdev_t *vd, int cmd, 562 zio_done_func_t *done, void *priv, enum zio_flag flags); 563 564 extern zio_t *zio_trim(zio_t *pio, vdev_t *vd, uint64_t offset, uint64_t size, 565 zio_done_func_t *done, void *priv, zio_priority_t priority, 566 enum zio_flag flags, enum trim_flag trim_flags); 567 568 extern zio_t *zio_read_phys(zio_t *pio, vdev_t *vd, uint64_t offset, 569 uint64_t size, struct abd *data, int checksum, 570 zio_done_func_t *done, void *priv, zio_priority_t priority, 571 enum zio_flag flags, boolean_t labels); 572 573 extern zio_t *zio_write_phys(zio_t *pio, vdev_t *vd, uint64_t offset, 574 uint64_t size, struct abd *data, int checksum, 575 zio_done_func_t *done, void *priv, zio_priority_t priority, 576 enum zio_flag flags, boolean_t labels); 577 578 extern zio_t *zio_free_sync(zio_t *pio, spa_t *spa, uint64_t txg, 579 const blkptr_t *bp, enum zio_flag flags); 580 581 extern int zio_alloc_zil(spa_t *spa, objset_t *os, uint64_t txg, 582 blkptr_t *new_bp, uint64_t size, boolean_t *slog); 583 extern void zio_flush(zio_t *zio, vdev_t *vd); 584 extern void zio_shrink(zio_t *zio, uint64_t size); 585 586 extern int zio_wait(zio_t *zio); 587 extern void zio_nowait(zio_t *zio); 588 extern void zio_execute(void *zio); 589 extern void zio_interrupt(void *zio); 590 extern void zio_delay_init(zio_t *zio); 591 extern void zio_delay_interrupt(zio_t *zio); 592 extern void zio_deadman(zio_t *zio, char *tag); 593 594 extern zio_t *zio_walk_parents(zio_t *cio, zio_link_t **); 595 extern zio_t *zio_walk_children(zio_t *pio, zio_link_t **); 596 extern zio_t *zio_unique_parent(zio_t *cio); 597 extern void zio_add_child(zio_t *pio, zio_t *cio); 598 599 extern void *zio_buf_alloc(size_t size); 600 extern void zio_buf_free(void *buf, size_t size); 601 extern void *zio_data_buf_alloc(size_t size); 602 extern void zio_data_buf_free(void *buf, size_t size); 603 604 extern void zio_push_transform(zio_t *zio, struct abd *abd, uint64_t size, 605 uint64_t bufsize, zio_transform_func_t *transform); 606 extern void zio_pop_transforms(zio_t *zio); 607 608 extern void zio_resubmit_stage_async(void *); 609 610 extern zio_t *zio_vdev_child_io(zio_t *zio, blkptr_t *bp, vdev_t *vd, 611 uint64_t offset, struct abd *data, uint64_t size, int type, 612 zio_priority_t priority, enum zio_flag flags, 613 zio_done_func_t *done, void *priv); 614 615 extern zio_t *zio_vdev_delegated_io(vdev_t *vd, uint64_t offset, 616 struct abd *data, uint64_t size, zio_type_t type, zio_priority_t priority, 617 enum zio_flag flags, zio_done_func_t *done, void *priv); 618 619 extern void zio_vdev_io_bypass(zio_t *zio); 620 extern void zio_vdev_io_reissue(zio_t *zio); 621 extern void zio_vdev_io_redone(zio_t *zio); 622 623 extern void zio_change_priority(zio_t *pio, zio_priority_t priority); 624 625 extern void zio_checksum_verified(zio_t *zio); 626 extern int zio_worst_error(int e1, int e2); 627 628 extern enum zio_checksum zio_checksum_select(enum zio_checksum child, 629 enum zio_checksum parent); 630 extern enum zio_checksum zio_checksum_dedup_select(spa_t *spa, 631 enum zio_checksum child, enum zio_checksum parent); 632 extern enum zio_compress zio_compress_select(spa_t *spa, 633 enum zio_compress child, enum zio_compress parent); 634 extern uint8_t zio_complevel_select(spa_t *spa, enum zio_compress compress, 635 uint8_t child, uint8_t parent); 636 637 extern void zio_suspend(spa_t *spa, zio_t *zio, zio_suspend_reason_t); 638 extern int zio_resume(spa_t *spa); 639 extern void zio_resume_wait(spa_t *spa); 640 641 extern boolean_t zfs_blkptr_verify(spa_t *spa, const blkptr_t *bp, 642 boolean_t config_held, enum blk_verify_flag blk_verify); 643 644 /* 645 * Initial setup and teardown. 646 */ 647 extern void zio_init(void); 648 extern void zio_fini(void); 649 650 /* 651 * Fault injection 652 */ 653 struct zinject_record; 654 extern uint32_t zio_injection_enabled; 655 extern int zio_inject_fault(char *name, int flags, int *id, 656 struct zinject_record *record); 657 extern int zio_inject_list_next(int *id, char *name, size_t buflen, 658 struct zinject_record *record); 659 extern int zio_clear_fault(int id); 660 extern void zio_handle_panic_injection(spa_t *spa, char *tag, uint64_t type); 661 extern int zio_handle_decrypt_injection(spa_t *spa, const zbookmark_phys_t *zb, 662 uint64_t type, int error); 663 extern int zio_handle_fault_injection(zio_t *zio, int error); 664 extern int zio_handle_device_injection(vdev_t *vd, zio_t *zio, int error); 665 extern int zio_handle_device_injections(vdev_t *vd, zio_t *zio, int err1, 666 int err2); 667 extern int zio_handle_label_injection(zio_t *zio, int error); 668 extern void zio_handle_ignored_writes(zio_t *zio); 669 extern hrtime_t zio_handle_io_delay(zio_t *zio); 670 671 /* 672 * Checksum ereport functions 673 */ 674 extern int zfs_ereport_start_checksum(spa_t *spa, vdev_t *vd, 675 const zbookmark_phys_t *zb, struct zio *zio, uint64_t offset, 676 uint64_t length, struct zio_bad_cksum *info); 677 extern void zfs_ereport_finish_checksum(zio_cksum_report_t *report, 678 const abd_t *good_data, const abd_t *bad_data, boolean_t drop_if_identical); 679 680 extern void zfs_ereport_free_checksum(zio_cksum_report_t *report); 681 682 /* If we have the good data in hand, this function can be used */ 683 extern int zfs_ereport_post_checksum(spa_t *spa, vdev_t *vd, 684 const zbookmark_phys_t *zb, struct zio *zio, uint64_t offset, 685 uint64_t length, const abd_t *good_data, const abd_t *bad_data, 686 struct zio_bad_cksum *info); 687 688 void zio_vsd_default_cksum_report(zio_t *zio, zio_cksum_report_t *zcr); 689 extern void zfs_ereport_snapshot_post(const char *subclass, spa_t *spa, 690 const char *name); 691 692 /* Called from spa_sync(), but primarily an injection handler */ 693 extern void spa_handle_ignored_writes(spa_t *spa); 694 695 /* zbookmark_phys functions */ 696 boolean_t zbookmark_subtree_completed(const struct dnode_phys *dnp, 697 const zbookmark_phys_t *subtree_root, const zbookmark_phys_t *last_block); 698 int zbookmark_compare(uint16_t dbss1, uint8_t ibs1, uint16_t dbss2, 699 uint8_t ibs2, const zbookmark_phys_t *zb1, const zbookmark_phys_t *zb2); 700 701 #ifdef __cplusplus 702 } 703 #endif 704 705 #endif /* _ZIO_H */ 706