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