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, 2018 by Delphix. All rights reserved. 26 * Copyright (c) 2013 by Saso Kiselkov. All rights reserved. 27 * Copyright 2019, Joyent, Inc. 28 * Copyright 2016 Toomas Soome <tsoome@me.com> 29 */ 30 31 #ifndef _ZIO_H 32 #define _ZIO_H 33 34 #include <sys/zio_priority.h> 35 #include <sys/zfs_context.h> 36 #include <sys/spa.h> 37 #include <sys/txg.h> 38 #include <sys/avl.h> 39 #include <sys/fs/zfs.h> 40 #include <sys/zio_impl.h> 41 42 #ifdef __cplusplus 43 extern "C" { 44 #endif 45 46 /* 47 * Embedded checksum 48 */ 49 #define ZEC_MAGIC 0x210da7ab10c7a11ULL 50 51 typedef struct zio_eck { 52 uint64_t zec_magic; /* for validation, endianness */ 53 zio_cksum_t zec_cksum; /* 256-bit checksum */ 54 } zio_eck_t; 55 56 /* 57 * Gang block headers are self-checksumming and contain an array 58 * of block pointers. 59 */ 60 #define SPA_GANGBLOCKSIZE SPA_MINBLOCKSIZE 61 #define SPA_GBH_NBLKPTRS ((SPA_GANGBLOCKSIZE - \ 62 sizeof (zio_eck_t)) / sizeof (blkptr_t)) 63 #define SPA_GBH_FILLER ((SPA_GANGBLOCKSIZE - \ 64 sizeof (zio_eck_t) - \ 65 (SPA_GBH_NBLKPTRS * sizeof (blkptr_t))) /\ 66 sizeof (uint64_t)) 67 68 typedef struct zio_gbh { 69 blkptr_t zg_blkptr[SPA_GBH_NBLKPTRS]; 70 uint64_t zg_filler[SPA_GBH_FILLER]; 71 zio_eck_t zg_tail; 72 } zio_gbh_phys_t; 73 74 enum zio_checksum { 75 ZIO_CHECKSUM_INHERIT = 0, 76 ZIO_CHECKSUM_ON, 77 ZIO_CHECKSUM_OFF, 78 ZIO_CHECKSUM_LABEL, 79 ZIO_CHECKSUM_GANG_HEADER, 80 ZIO_CHECKSUM_ZILOG, 81 ZIO_CHECKSUM_FLETCHER_2, 82 ZIO_CHECKSUM_FLETCHER_4, 83 ZIO_CHECKSUM_SHA256, 84 ZIO_CHECKSUM_ZILOG2, 85 ZIO_CHECKSUM_NOPARITY, 86 ZIO_CHECKSUM_SHA512, 87 ZIO_CHECKSUM_SKEIN, 88 ZIO_CHECKSUM_EDONR, 89 ZIO_CHECKSUM_FUNCTIONS 90 }; 91 92 /* 93 * The number of "legacy" compression functions which can be set on individual 94 * objects. 95 */ 96 #define ZIO_CHECKSUM_LEGACY_FUNCTIONS ZIO_CHECKSUM_ZILOG2 97 98 #define ZIO_CHECKSUM_ON_VALUE ZIO_CHECKSUM_FLETCHER_4 99 #define ZIO_CHECKSUM_DEFAULT ZIO_CHECKSUM_ON 100 101 #define ZIO_CHECKSUM_MASK 0xffULL 102 #define ZIO_CHECKSUM_VERIFY (1 << 8) 103 104 #define ZIO_DEDUPCHECKSUM ZIO_CHECKSUM_SHA256 105 #define ZIO_DEDUPDITTO_MIN 100 106 107 #define ZIO_CRYPT_ON_VALUE ZIO_CRYPT_AES_256_CCM 108 #define ZIO_CRYPT_DEFAULT ZIO_CRYPT_OFF 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_OFF 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_ON || \ 144 (compress) == ZIO_COMPRESS_OFF) 145 146 #define ZIO_FAILURE_MODE_WAIT 0 147 #define ZIO_FAILURE_MODE_CONTINUE 1 148 #define ZIO_FAILURE_MODE_PANIC 2 149 150 typedef enum zio_suspend_reason { 151 ZIO_SUSPEND_NONE = 0, 152 ZIO_SUSPEND_IOERR, 153 ZIO_SUSPEND_MMP, 154 } zio_suspend_reason_t; 155 156 enum zio_flag { 157 /* 158 * Flags inherited by gang, ddt, and vdev children, 159 * and that must be equal for two zios to aggregate 160 */ 161 ZIO_FLAG_DONT_AGGREGATE = 1 << 0, 162 ZIO_FLAG_IO_REPAIR = 1 << 1, 163 ZIO_FLAG_SELF_HEAL = 1 << 2, 164 ZIO_FLAG_RESILVER = 1 << 3, 165 ZIO_FLAG_SCRUB = 1 << 4, 166 ZIO_FLAG_SCAN_THREAD = 1 << 5, 167 ZIO_FLAG_PHYSICAL = 1 << 6, 168 169 #define ZIO_FLAG_AGG_INHERIT (ZIO_FLAG_CANFAIL - 1) 170 171 /* 172 * Flags inherited by ddt, gang, and vdev children. 173 */ 174 ZIO_FLAG_CANFAIL = 1 << 7, /* must be first for INHERIT */ 175 ZIO_FLAG_SPECULATIVE = 1 << 8, 176 ZIO_FLAG_CONFIG_WRITER = 1 << 9, 177 ZIO_FLAG_DONT_RETRY = 1 << 10, 178 ZIO_FLAG_DONT_CACHE = 1 << 11, 179 ZIO_FLAG_NODATA = 1 << 12, 180 ZIO_FLAG_INDUCE_DAMAGE = 1 << 13, 181 ZIO_FLAG_IO_ALLOCATING = 1 << 14, 182 183 #define ZIO_FLAG_DDT_INHERIT (ZIO_FLAG_IO_RETRY - 1) 184 #define ZIO_FLAG_GANG_INHERIT (ZIO_FLAG_IO_RETRY - 1) 185 186 /* 187 * Flags inherited by vdev children. 188 */ 189 ZIO_FLAG_IO_RETRY = 1 << 15, /* must be first for INHERIT */ 190 ZIO_FLAG_PROBE = 1 << 16, 191 ZIO_FLAG_TRYHARD = 1 << 17, 192 ZIO_FLAG_OPTIONAL = 1 << 18, 193 194 #define ZIO_FLAG_VDEV_INHERIT (ZIO_FLAG_DONT_QUEUE - 1) 195 196 /* 197 * Flags not inherited by any children. 198 */ 199 ZIO_FLAG_DONT_QUEUE = 1 << 19, /* must be first for INHERIT */ 200 ZIO_FLAG_DONT_PROPAGATE = 1 << 20, 201 ZIO_FLAG_IO_BYPASS = 1 << 21, 202 ZIO_FLAG_IO_REWRITE = 1 << 22, 203 ZIO_FLAG_RAW_COMPRESS = 1 << 23, 204 ZIO_FLAG_RAW_ENCRYPT = 1 << 24, 205 ZIO_FLAG_GANG_CHILD = 1 << 25, 206 ZIO_FLAG_DDT_CHILD = 1 << 26, 207 ZIO_FLAG_GODFATHER = 1 << 27, 208 ZIO_FLAG_NOPWRITE = 1 << 28, 209 ZIO_FLAG_REEXECUTED = 1 << 29, 210 ZIO_FLAG_DELEGATED = 1 << 30, 211 }; 212 213 #define ZIO_FLAG_MUSTSUCCEED 0 214 #define ZIO_FLAG_RAW (ZIO_FLAG_RAW_COMPRESS | ZIO_FLAG_RAW_ENCRYPT) 215 216 #define ZIO_DDT_CHILD_FLAGS(zio) \ 217 (((zio)->io_flags & ZIO_FLAG_DDT_INHERIT) | \ 218 ZIO_FLAG_DDT_CHILD | ZIO_FLAG_CANFAIL) 219 220 #define ZIO_GANG_CHILD_FLAGS(zio) \ 221 (((zio)->io_flags & ZIO_FLAG_GANG_INHERIT) | \ 222 ZIO_FLAG_GANG_CHILD | ZIO_FLAG_CANFAIL) 223 224 #define ZIO_VDEV_CHILD_FLAGS(zio) \ 225 (((zio)->io_flags & ZIO_FLAG_VDEV_INHERIT) | \ 226 ZIO_FLAG_DONT_PROPAGATE | ZIO_FLAG_CANFAIL) 227 228 #define ZIO_CHILD_BIT(x) (1 << (x)) 229 #define ZIO_CHILD_BIT_IS_SET(val, x) ((val) & (1 << (x))) 230 231 enum zio_child { 232 ZIO_CHILD_VDEV = 0, 233 ZIO_CHILD_GANG, 234 ZIO_CHILD_DDT, 235 ZIO_CHILD_LOGICAL, 236 ZIO_CHILD_TYPES 237 }; 238 239 #define ZIO_CHILD_VDEV_BIT ZIO_CHILD_BIT(ZIO_CHILD_VDEV) 240 #define ZIO_CHILD_GANG_BIT ZIO_CHILD_BIT(ZIO_CHILD_GANG) 241 #define ZIO_CHILD_DDT_BIT ZIO_CHILD_BIT(ZIO_CHILD_DDT) 242 #define ZIO_CHILD_LOGICAL_BIT ZIO_CHILD_BIT(ZIO_CHILD_LOGICAL) 243 #define ZIO_CHILD_ALL_BITS \ 244 (ZIO_CHILD_VDEV_BIT | ZIO_CHILD_GANG_BIT | \ 245 ZIO_CHILD_DDT_BIT | ZIO_CHILD_LOGICAL_BIT) 246 247 enum zio_wait_type { 248 ZIO_WAIT_READY = 0, 249 ZIO_WAIT_DONE, 250 ZIO_WAIT_TYPES 251 }; 252 253 /* 254 * We'll take the unused errnos, 'EBADE' and 'EBADR' (from the Convergent 255 * graveyard) to indicate checksum errors and fragmentation. 256 */ 257 #define ECKSUM EBADE 258 #define EFRAGS EBADR 259 260 typedef void zio_done_func_t(zio_t *zio); 261 262 extern boolean_t zio_dva_throttle_enabled; 263 extern const char *zio_type_name[ZIO_TYPES]; 264 265 /* 266 * A bookmark is a four-tuple <objset, object, level, blkid> that uniquely 267 * identifies any block in the pool. By convention, the meta-objset (MOS) 268 * is objset 0, and the meta-dnode is object 0. This covers all blocks 269 * except root blocks and ZIL blocks, which are defined as follows: 270 * 271 * Root blocks (objset_phys_t) are object 0, level -1: <objset, 0, -1, 0>. 272 * ZIL blocks are bookmarked <objset, 0, -2, blkid == ZIL sequence number>. 273 * dmu_sync()ed ZIL data blocks are bookmarked <objset, object, -2, blkid>. 274 * dnode visit bookmarks are <objset, object id of dnode, -3, 0>. 275 * 276 * Note: this structure is called a bookmark because its original purpose 277 * was to remember where to resume a pool-wide traverse. 278 * 279 * Note: this structure is passed between userland and the kernel, and is 280 * stored on disk (by virtue of being incorporated into other on-disk 281 * structures, e.g. dsl_scan_phys_t). 282 */ 283 typedef struct zbookmark_phys { 284 uint64_t zb_objset; 285 uint64_t zb_object; 286 int64_t zb_level; 287 uint64_t zb_blkid; 288 } zbookmark_phys_t; 289 290 #define SET_BOOKMARK(zb, objset, object, level, blkid) \ 291 { \ 292 (zb)->zb_objset = objset; \ 293 (zb)->zb_object = object; \ 294 (zb)->zb_level = level; \ 295 (zb)->zb_blkid = blkid; \ 296 } 297 298 #define ZB_DESTROYED_OBJSET (-1ULL) 299 300 #define ZB_ROOT_OBJECT (0ULL) 301 #define ZB_ROOT_LEVEL (-1LL) 302 #define ZB_ROOT_BLKID (0ULL) 303 304 #define ZB_ZIL_OBJECT (0ULL) 305 #define ZB_ZIL_LEVEL (-2LL) 306 307 #define ZB_DNODE_LEVEL (-3LL) 308 #define ZB_DNODE_BLKID (0ULL) 309 310 #define ZB_IS_ZERO(zb) \ 311 ((zb)->zb_objset == 0 && (zb)->zb_object == 0 && \ 312 (zb)->zb_level == 0 && (zb)->zb_blkid == 0) 313 #define ZB_IS_ROOT(zb) \ 314 ((zb)->zb_object == ZB_ROOT_OBJECT && \ 315 (zb)->zb_level == ZB_ROOT_LEVEL && \ 316 (zb)->zb_blkid == ZB_ROOT_BLKID) 317 318 typedef struct zio_prop { 319 enum zio_checksum zp_checksum; 320 enum zio_compress zp_compress; 321 dmu_object_type_t zp_type; 322 uint8_t zp_level; 323 uint8_t zp_copies; 324 boolean_t zp_dedup; 325 boolean_t zp_dedup_verify; 326 boolean_t zp_nopwrite; 327 uint32_t zp_zpl_smallblk; 328 boolean_t zp_encrypt; 329 boolean_t zp_byteorder; 330 uint8_t zp_salt[ZIO_DATA_SALT_LEN]; 331 uint8_t zp_iv[ZIO_DATA_IV_LEN]; 332 uint8_t zp_mac[ZIO_DATA_MAC_LEN]; 333 } zio_prop_t; 334 335 typedef struct zio_cksum_report zio_cksum_report_t; 336 337 typedef void zio_cksum_finish_f(zio_cksum_report_t *rep, 338 const abd_t *good_data); 339 typedef void zio_cksum_free_f(void *cbdata, size_t size); 340 341 struct zio_bad_cksum; /* defined in zio_checksum.h */ 342 struct dnode_phys; 343 struct abd; 344 345 struct zio_cksum_report { 346 struct zio_cksum_report *zcr_next; 347 nvlist_t *zcr_ereport; 348 nvlist_t *zcr_detector; 349 void *zcr_cbdata; 350 size_t zcr_cbinfo; /* passed to zcr_free() */ 351 uint64_t zcr_align; 352 uint64_t zcr_length; 353 zio_cksum_finish_f *zcr_finish; 354 zio_cksum_free_f *zcr_free; 355 356 /* internal use only */ 357 struct zio_bad_cksum *zcr_ckinfo; /* information from failure */ 358 }; 359 360 typedef void zio_vsd_cksum_report_f(zio_t *zio, zio_cksum_report_t *zcr, 361 void *arg); 362 363 zio_vsd_cksum_report_f zio_vsd_default_cksum_report; 364 365 typedef struct zio_vsd_ops { 366 zio_done_func_t *vsd_free; 367 zio_vsd_cksum_report_f *vsd_cksum_report; 368 } zio_vsd_ops_t; 369 370 typedef struct zio_gang_node { 371 zio_gbh_phys_t *gn_gbh; 372 struct zio_gang_node *gn_child[SPA_GBH_NBLKPTRS]; 373 } zio_gang_node_t; 374 375 typedef zio_t *zio_gang_issue_func_t(zio_t *zio, blkptr_t *bp, 376 zio_gang_node_t *gn, struct abd *data, uint64_t offset); 377 378 typedef void zio_transform_func_t(zio_t *zio, struct abd *data, uint64_t size); 379 380 typedef struct zio_transform { 381 struct abd *zt_orig_abd; 382 uint64_t zt_orig_size; 383 uint64_t zt_bufsize; 384 zio_transform_func_t *zt_transform; 385 struct zio_transform *zt_next; 386 } zio_transform_t; 387 388 typedef int zio_pipe_stage_t(zio_t *zio); 389 390 /* 391 * The io_reexecute flags are distinct from io_flags because the child must 392 * be able to propagate them to the parent. The normal io_flags are local 393 * to the zio, not protected by any lock, and not modifiable by children; 394 * the reexecute flags are protected by io_lock, modifiable by children, 395 * and always propagated -- even when ZIO_FLAG_DONT_PROPAGATE is set. 396 */ 397 #define ZIO_REEXECUTE_NOW 0x01 398 #define ZIO_REEXECUTE_SUSPEND 0x02 399 400 /* 401 * The io_trim flags are used to specify the type of TRIM to perform. They 402 * only apply to ZIO_TYPE_TRIM zios and are distinct from io_flags. 403 */ 404 enum trim_flag { 405 ZIO_TRIM_SECURE = 1 << 0, 406 }; 407 408 typedef struct zio_alloc_list { 409 list_t zal_list; 410 uint64_t zal_size; 411 } zio_alloc_list_t; 412 413 typedef struct zio_link { 414 zio_t *zl_parent; 415 zio_t *zl_child; 416 list_node_t zl_parent_node; 417 list_node_t zl_child_node; 418 } zio_link_t; 419 420 struct zio { 421 /* Core information about this I/O */ 422 zbookmark_phys_t io_bookmark; 423 zio_prop_t io_prop; 424 zio_type_t io_type; 425 enum zio_child io_child_type; 426 enum trim_flag io_trim_flags; 427 int io_cmd; 428 zio_priority_t io_priority; 429 uint8_t io_reexecute; 430 uint8_t io_state[ZIO_WAIT_TYPES]; 431 uint64_t io_txg; 432 spa_t *io_spa; 433 blkptr_t *io_bp; 434 blkptr_t *io_bp_override; 435 blkptr_t io_bp_copy; 436 list_t io_parent_list; 437 list_t io_child_list; 438 zio_t *io_logical; 439 zio_transform_t *io_transform_stack; 440 441 /* Callback info */ 442 zio_done_func_t *io_ready; 443 zio_done_func_t *io_children_ready; 444 zio_done_func_t *io_physdone; 445 zio_done_func_t *io_done; 446 void *io_private; 447 int64_t io_prev_space_delta; /* DMU private */ 448 blkptr_t io_bp_orig; 449 450 /* Data represented by this I/O */ 451 struct abd *io_abd; 452 struct abd *io_orig_abd; 453 uint64_t io_size; 454 uint64_t io_orig_size; 455 /* io_lsize != io_orig_size iff this is a raw write */ 456 uint64_t io_lsize; 457 458 /* Stuff for the vdev stack */ 459 vdev_t *io_vd; 460 void *io_vsd; 461 const zio_vsd_ops_t *io_vsd_ops; 462 metaslab_class_t *io_metaslab_class; /* dva throttle class */ 463 464 uint64_t io_offset; 465 hrtime_t io_timestamp; 466 hrtime_t io_queued_timestamp; 467 hrtime_t io_target_timestamp; 468 hrtime_t io_delta; /* vdev queue service delta */ 469 hrtime_t io_delay; /* Device access time (disk or */ 470 /* file). */ 471 avl_node_t io_queue_node; 472 avl_node_t io_offset_node; 473 avl_node_t io_alloc_node; 474 zio_alloc_list_t io_alloc_list; 475 476 /* Internal pipeline state */ 477 enum zio_flag io_flags; 478 enum zio_stage io_stage; 479 enum zio_stage io_pipeline; 480 enum zio_flag io_orig_flags; 481 enum zio_stage io_orig_stage; 482 enum zio_stage io_orig_pipeline; 483 enum zio_stage io_pipeline_trace; 484 int io_error; 485 int io_child_error[ZIO_CHILD_TYPES]; 486 uint64_t io_children[ZIO_CHILD_TYPES][ZIO_WAIT_TYPES]; 487 uint64_t io_child_count; 488 uint64_t io_phys_children; 489 uint64_t io_parent_count; 490 uint64_t *io_stall; 491 zio_t *io_gang_leader; 492 zio_gang_node_t *io_gang_tree; 493 void *io_executor; 494 void *io_waiter; 495 kmutex_t io_lock; 496 kcondvar_t io_cv; 497 int io_allocator; 498 499 /* FMA state */ 500 zio_cksum_report_t *io_cksum_report; 501 uint64_t io_ena; 502 503 /* Taskq dispatching state */ 504 taskq_ent_t io_tqent; 505 }; 506 507 extern int zio_bookmark_compare(const void *, const void *); 508 509 extern zio_t *zio_null(zio_t *pio, spa_t *spa, vdev_t *vd, 510 zio_done_func_t *done, void *private, enum zio_flag flags); 511 512 extern zio_t *zio_root(spa_t *spa, 513 zio_done_func_t *done, void *private, enum zio_flag flags); 514 515 extern zio_t *zio_read(zio_t *pio, spa_t *spa, const blkptr_t *bp, 516 struct abd *data, uint64_t lsize, zio_done_func_t *done, void *private, 517 zio_priority_t priority, enum zio_flag flags, const zbookmark_phys_t *zb); 518 519 extern zio_t *zio_write(zio_t *pio, spa_t *spa, uint64_t txg, blkptr_t *bp, 520 struct abd *data, uint64_t size, uint64_t psize, const zio_prop_t *zp, 521 zio_done_func_t *ready, zio_done_func_t *children_ready, 522 zio_done_func_t *physdone, zio_done_func_t *done, 523 void *private, zio_priority_t priority, enum zio_flag flags, 524 const zbookmark_phys_t *zb); 525 526 extern zio_t *zio_rewrite(zio_t *pio, spa_t *spa, uint64_t txg, blkptr_t *bp, 527 struct abd *data, uint64_t size, zio_done_func_t *done, void *private, 528 zio_priority_t priority, enum zio_flag flags, zbookmark_phys_t *zb); 529 530 extern void zio_write_override(zio_t *zio, blkptr_t *bp, int copies, 531 boolean_t nopwrite); 532 533 extern void zio_free(spa_t *spa, uint64_t txg, const blkptr_t *bp); 534 535 extern zio_t *zio_claim(zio_t *pio, spa_t *spa, uint64_t txg, 536 const blkptr_t *bp, 537 zio_done_func_t *done, void *private, enum zio_flag flags); 538 539 extern zio_t *zio_ioctl(zio_t *pio, spa_t *spa, vdev_t *vd, int cmd, 540 zio_done_func_t *done, void *private, enum zio_flag flags); 541 542 extern zio_t *zio_trim(zio_t *pio, vdev_t *vd, uint64_t offset, uint64_t size, 543 zio_done_func_t *done, void *private, zio_priority_t priority, 544 enum zio_flag flags, enum trim_flag trim_flags); 545 546 extern zio_t *zio_read_phys(zio_t *pio, vdev_t *vd, uint64_t offset, 547 uint64_t size, struct abd *data, int checksum, 548 zio_done_func_t *done, void *private, zio_priority_t priority, 549 enum zio_flag flags, boolean_t labels); 550 551 extern zio_t *zio_write_phys(zio_t *pio, vdev_t *vd, uint64_t offset, 552 uint64_t size, struct abd *data, int checksum, 553 zio_done_func_t *done, void *private, zio_priority_t priority, 554 enum zio_flag flags, boolean_t labels); 555 556 extern zio_t *zio_free_sync(zio_t *pio, spa_t *spa, uint64_t txg, 557 const blkptr_t *bp, enum zio_flag flags); 558 559 extern int zio_alloc_zil(spa_t *spa, objset_t *os, uint64_t txg, 560 blkptr_t *new_bp, blkptr_t *old_bp, uint64_t size, boolean_t *slog); 561 extern void zio_free_zil(spa_t *spa, uint64_t txg, blkptr_t *bp); 562 extern void zio_flush(zio_t *zio, vdev_t *vd); 563 extern void zio_shrink(zio_t *zio, uint64_t size); 564 565 extern int zio_wait(zio_t *zio); 566 extern void zio_nowait(zio_t *zio); 567 extern void zio_execute(zio_t *zio); 568 extern void zio_interrupt(zio_t *zio); 569 extern void zio_delay_init(zio_t *zio); 570 extern void zio_delay_interrupt(zio_t *zio); 571 572 extern zio_t *zio_walk_parents(zio_t *cio, zio_link_t **); 573 extern zio_t *zio_walk_children(zio_t *pio, zio_link_t **); 574 extern zio_t *zio_unique_parent(zio_t *cio); 575 extern void zio_add_child(zio_t *pio, zio_t *cio); 576 577 extern void *zio_buf_alloc(size_t size); 578 extern void zio_buf_free(void *buf, size_t size); 579 extern void *zio_data_buf_alloc(size_t size); 580 extern void zio_data_buf_free(void *buf, size_t size); 581 582 extern void zio_push_transform(zio_t *zio, struct abd *abd, uint64_t size, 583 uint64_t bufsize, zio_transform_func_t *transform); 584 extern void zio_pop_transforms(zio_t *zio); 585 586 extern void zio_resubmit_stage_async(void *); 587 588 extern zio_t *zio_vdev_child_io(zio_t *zio, blkptr_t *bp, vdev_t *vd, 589 uint64_t offset, struct abd *data, uint64_t size, int type, 590 zio_priority_t priority, enum zio_flag flags, 591 zio_done_func_t *done, void *private); 592 593 extern zio_t *zio_vdev_delegated_io(vdev_t *vd, uint64_t offset, 594 struct abd *data, uint64_t size, zio_type_t type, zio_priority_t priority, 595 enum zio_flag flags, zio_done_func_t *done, void *private); 596 597 extern void zio_vdev_io_bypass(zio_t *zio); 598 extern void zio_vdev_io_reissue(zio_t *zio); 599 extern void zio_vdev_io_redone(zio_t *zio); 600 601 extern void zio_change_priority(zio_t *pio, zio_priority_t priority); 602 603 extern void zio_checksum_verified(zio_t *zio); 604 extern int zio_worst_error(int e1, int e2); 605 606 extern enum zio_checksum zio_checksum_select(enum zio_checksum child, 607 enum zio_checksum parent); 608 extern enum zio_checksum zio_checksum_dedup_select(spa_t *spa, 609 enum zio_checksum child, enum zio_checksum parent); 610 extern enum zio_compress zio_compress_select(spa_t *spa, 611 enum zio_compress child, enum zio_compress parent); 612 613 extern void zio_suspend(spa_t *spa, zio_t *zio, zio_suspend_reason_t); 614 extern int zio_resume(spa_t *spa); 615 extern void zio_resume_wait(spa_t *spa); 616 617 /* 618 * Initial setup and teardown. 619 */ 620 extern void zio_init(void); 621 extern void zio_fini(void); 622 623 /* 624 * Fault injection 625 */ 626 struct zinject_record; 627 extern uint32_t zio_injection_enabled; 628 extern int zio_inject_fault(char *name, int flags, int *id, 629 struct zinject_record *record); 630 extern int zio_inject_list_next(int *id, char *name, size_t buflen, 631 struct zinject_record *record); 632 extern int zio_clear_fault(int id); 633 extern void zio_handle_panic_injection(spa_t *spa, char *tag, uint64_t type); 634 extern int zio_handle_decrypt_injection(spa_t *spa, const zbookmark_phys_t *zb, 635 uint64_t type, int error); 636 extern int zio_handle_fault_injection(zio_t *zio, int error); 637 extern int zio_handle_device_injection(vdev_t *vd, zio_t *zio, int error); 638 extern int zio_handle_label_injection(zio_t *zio, int error); 639 extern void zio_handle_ignored_writes(zio_t *zio); 640 extern hrtime_t zio_handle_io_delay(zio_t *zio); 641 642 /* 643 * Checksum ereport functions 644 */ 645 extern void zfs_ereport_start_checksum(spa_t *spa, vdev_t *vd, 646 const zbookmark_phys_t *zb, struct zio *zio, uint64_t offset, 647 uint64_t length, void *arg, struct zio_bad_cksum *info); 648 extern void zfs_ereport_finish_checksum(zio_cksum_report_t *report, 649 const abd_t *good_data, const abd_t *bad_data, boolean_t drop_if_identical); 650 651 extern void zfs_ereport_send_interim_checksum(zio_cksum_report_t *report); 652 extern void zfs_ereport_free_checksum(zio_cksum_report_t *report); 653 654 /* If we have the good data in hand, this function can be used */ 655 extern int zfs_ereport_post_checksum(spa_t *spa, vdev_t *vd, 656 const zbookmark_phys_t *zb, struct zio *zio, uint64_t offset, 657 uint64_t length, const abd_t *good_data, const abd_t *bad_data, 658 struct zio_bad_cksum *info); 659 660 /* Called from spa_sync(), but primarily an injection handler */ 661 extern void spa_handle_ignored_writes(spa_t *spa); 662 663 /* zbookmark_phys functions */ 664 boolean_t zbookmark_subtree_completed(const struct dnode_phys *dnp, 665 const zbookmark_phys_t *subtree_root, const zbookmark_phys_t *last_block); 666 int zbookmark_compare(uint16_t dbss1, uint8_t ibs1, uint16_t dbss2, 667 uint8_t ibs2, const zbookmark_phys_t *zb1, const zbookmark_phys_t *zb2); 668 669 #ifdef __cplusplus 670 } 671 #endif 672 673 #endif /* _ZIO_H */ 674