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, 2014 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 */ 29 30 #ifndef _ZIO_H 31 #define _ZIO_H 32 33 #include <sys/zio_priority.h> 34 #include <sys/zfs_context.h> 35 #include <sys/spa.h> 36 #include <sys/txg.h> 37 #include <sys/avl.h> 38 #include <sys/fs/zfs.h> 39 #include <sys/zio_impl.h> 40 41 #ifdef __cplusplus 42 extern "C" { 43 #endif 44 45 /* 46 * Embedded checksum 47 */ 48 #define ZEC_MAGIC 0x210da7ab10c7a11ULL 49 50 typedef struct zio_eck { 51 uint64_t zec_magic; /* for validation, endianness */ 52 zio_cksum_t zec_cksum; /* 256-bit checksum */ 53 } zio_eck_t; 54 55 /* 56 * Gang block headers are self-checksumming and contain an array 57 * of block pointers. 58 */ 59 #define SPA_GANGBLOCKSIZE SPA_MINBLOCKSIZE 60 #define SPA_GBH_NBLKPTRS ((SPA_GANGBLOCKSIZE - \ 61 sizeof (zio_eck_t)) / sizeof (blkptr_t)) 62 #define SPA_GBH_FILLER ((SPA_GANGBLOCKSIZE - \ 63 sizeof (zio_eck_t) - \ 64 (SPA_GBH_NBLKPTRS * sizeof (blkptr_t))) /\ 65 sizeof (uint64_t)) 66 67 typedef struct zio_gbh { 68 blkptr_t zg_blkptr[SPA_GBH_NBLKPTRS]; 69 uint64_t zg_filler[SPA_GBH_FILLER]; 70 zio_eck_t zg_tail; 71 } zio_gbh_phys_t; 72 73 enum zio_checksum { 74 ZIO_CHECKSUM_INHERIT = 0, 75 ZIO_CHECKSUM_ON, 76 ZIO_CHECKSUM_OFF, 77 ZIO_CHECKSUM_LABEL, 78 ZIO_CHECKSUM_GANG_HEADER, 79 ZIO_CHECKSUM_ZILOG, 80 ZIO_CHECKSUM_FLETCHER_2, 81 ZIO_CHECKSUM_FLETCHER_4, 82 ZIO_CHECKSUM_SHA256, 83 ZIO_CHECKSUM_ZILOG2, 84 ZIO_CHECKSUM_NOPARITY, 85 ZIO_CHECKSUM_FUNCTIONS 86 }; 87 88 /* 89 * The number of "legacy" compression functions which can be set on individual 90 * objects. 91 */ 92 #define ZIO_CHECKSUM_LEGACY_FUNCTIONS ZIO_CHECKSUM_ZILOG2 93 94 #define ZIO_CHECKSUM_ON_VALUE ZIO_CHECKSUM_FLETCHER_4 95 #define ZIO_CHECKSUM_DEFAULT ZIO_CHECKSUM_ON 96 97 #define ZIO_CHECKSUM_MASK 0xffULL 98 #define ZIO_CHECKSUM_VERIFY (1 << 8) 99 100 #define ZIO_DEDUPCHECKSUM ZIO_CHECKSUM_SHA256 101 #define ZIO_DEDUPDITTO_MIN 100 102 103 enum zio_compress { 104 ZIO_COMPRESS_INHERIT = 0, 105 ZIO_COMPRESS_ON, 106 ZIO_COMPRESS_OFF, 107 ZIO_COMPRESS_LZJB, 108 ZIO_COMPRESS_EMPTY, 109 ZIO_COMPRESS_GZIP_1, 110 ZIO_COMPRESS_GZIP_2, 111 ZIO_COMPRESS_GZIP_3, 112 ZIO_COMPRESS_GZIP_4, 113 ZIO_COMPRESS_GZIP_5, 114 ZIO_COMPRESS_GZIP_6, 115 ZIO_COMPRESS_GZIP_7, 116 ZIO_COMPRESS_GZIP_8, 117 ZIO_COMPRESS_GZIP_9, 118 ZIO_COMPRESS_ZLE, 119 ZIO_COMPRESS_LZ4, 120 ZIO_COMPRESS_FUNCTIONS 121 }; 122 123 /* 124 * The number of "legacy" compression functions which can be set on individual 125 * objects. 126 */ 127 #define ZIO_COMPRESS_LEGACY_FUNCTIONS ZIO_COMPRESS_LZ4 128 129 /* 130 * The meaning of "compress = on" selected by the compression features enabled 131 * on a given pool. 132 */ 133 #define ZIO_COMPRESS_LEGACY_ON_VALUE ZIO_COMPRESS_LZJB 134 #define ZIO_COMPRESS_LZ4_ON_VALUE ZIO_COMPRESS_LZ4 135 136 #define ZIO_COMPRESS_DEFAULT ZIO_COMPRESS_OFF 137 138 #define BOOTFS_COMPRESS_VALID(compress) \ 139 ((compress) == ZIO_COMPRESS_LZJB || \ 140 (compress) == ZIO_COMPRESS_LZ4 || \ 141 (compress) == ZIO_COMPRESS_ON || \ 142 (compress) == ZIO_COMPRESS_OFF) 143 144 #define ZIO_FAILURE_MODE_WAIT 0 145 #define ZIO_FAILURE_MODE_CONTINUE 1 146 #define ZIO_FAILURE_MODE_PANIC 2 147 148 enum zio_flag { 149 /* 150 * Flags inherited by gang, ddt, and vdev children, 151 * and that must be equal for two zios to aggregate 152 */ 153 ZIO_FLAG_DONT_AGGREGATE = 1 << 0, 154 ZIO_FLAG_IO_REPAIR = 1 << 1, 155 ZIO_FLAG_SELF_HEAL = 1 << 2, 156 ZIO_FLAG_RESILVER = 1 << 3, 157 ZIO_FLAG_SCRUB = 1 << 4, 158 ZIO_FLAG_SCAN_THREAD = 1 << 5, 159 ZIO_FLAG_PHYSICAL = 1 << 6, 160 161 #define ZIO_FLAG_AGG_INHERIT (ZIO_FLAG_CANFAIL - 1) 162 163 /* 164 * Flags inherited by ddt, gang, and vdev children. 165 */ 166 ZIO_FLAG_CANFAIL = 1 << 7, /* must be first for INHERIT */ 167 ZIO_FLAG_SPECULATIVE = 1 << 8, 168 ZIO_FLAG_CONFIG_WRITER = 1 << 9, 169 ZIO_FLAG_DONT_RETRY = 1 << 10, 170 ZIO_FLAG_DONT_CACHE = 1 << 11, 171 ZIO_FLAG_NODATA = 1 << 12, 172 ZIO_FLAG_INDUCE_DAMAGE = 1 << 13, 173 174 #define ZIO_FLAG_DDT_INHERIT (ZIO_FLAG_IO_RETRY - 1) 175 #define ZIO_FLAG_GANG_INHERIT (ZIO_FLAG_IO_RETRY - 1) 176 177 /* 178 * Flags inherited by vdev children. 179 */ 180 ZIO_FLAG_IO_RETRY = 1 << 14, /* must be first for INHERIT */ 181 ZIO_FLAG_PROBE = 1 << 15, 182 ZIO_FLAG_TRYHARD = 1 << 16, 183 ZIO_FLAG_OPTIONAL = 1 << 17, 184 185 #define ZIO_FLAG_VDEV_INHERIT (ZIO_FLAG_DONT_QUEUE - 1) 186 187 /* 188 * Flags not inherited by any children. 189 */ 190 ZIO_FLAG_DONT_QUEUE = 1 << 18, /* must be first for INHERIT */ 191 ZIO_FLAG_DONT_PROPAGATE = 1 << 19, 192 ZIO_FLAG_IO_BYPASS = 1 << 20, 193 ZIO_FLAG_IO_REWRITE = 1 << 21, 194 ZIO_FLAG_RAW = 1 << 22, 195 ZIO_FLAG_GANG_CHILD = 1 << 23, 196 ZIO_FLAG_DDT_CHILD = 1 << 24, 197 ZIO_FLAG_GODFATHER = 1 << 25, 198 ZIO_FLAG_NOPWRITE = 1 << 26, 199 ZIO_FLAG_REEXECUTED = 1 << 27, 200 ZIO_FLAG_DELEGATED = 1 << 28, 201 }; 202 203 #define ZIO_FLAG_MUSTSUCCEED 0 204 205 #define ZIO_DDT_CHILD_FLAGS(zio) \ 206 (((zio)->io_flags & ZIO_FLAG_DDT_INHERIT) | \ 207 ZIO_FLAG_DDT_CHILD | ZIO_FLAG_CANFAIL) 208 209 #define ZIO_GANG_CHILD_FLAGS(zio) \ 210 (((zio)->io_flags & ZIO_FLAG_GANG_INHERIT) | \ 211 ZIO_FLAG_GANG_CHILD | ZIO_FLAG_CANFAIL) 212 213 #define ZIO_VDEV_CHILD_FLAGS(zio) \ 214 (((zio)->io_flags & ZIO_FLAG_VDEV_INHERIT) | \ 215 ZIO_FLAG_CANFAIL) 216 217 enum zio_child { 218 ZIO_CHILD_VDEV = 0, 219 ZIO_CHILD_GANG, 220 ZIO_CHILD_DDT, 221 ZIO_CHILD_LOGICAL, 222 ZIO_CHILD_TYPES 223 }; 224 225 enum zio_wait_type { 226 ZIO_WAIT_READY = 0, 227 ZIO_WAIT_DONE, 228 ZIO_WAIT_TYPES 229 }; 230 231 /* 232 * We'll take the unused errnos, 'EBADE' and 'EBADR' (from the Convergent 233 * graveyard) to indicate checksum errors and fragmentation. 234 */ 235 #define ECKSUM EBADE 236 #define EFRAGS EBADR 237 238 typedef void zio_done_func_t(zio_t *zio); 239 240 extern const char *zio_type_name[ZIO_TYPES]; 241 242 /* 243 * A bookmark is a four-tuple <objset, object, level, blkid> that uniquely 244 * identifies any block in the pool. By convention, the meta-objset (MOS) 245 * is objset 0, and the meta-dnode is object 0. This covers all blocks 246 * except root blocks and ZIL blocks, which are defined as follows: 247 * 248 * Root blocks (objset_phys_t) are object 0, level -1: <objset, 0, -1, 0>. 249 * ZIL blocks are bookmarked <objset, 0, -2, blkid == ZIL sequence number>. 250 * dmu_sync()ed ZIL data blocks are bookmarked <objset, object, -2, blkid>. 251 * dnode visit bookmarks are <objset, object id of dnode, -3, 0>. 252 * 253 * Note: this structure is called a bookmark because its original purpose 254 * was to remember where to resume a pool-wide traverse. 255 * 256 * Note: this structure is passed between userland and the kernel, and is 257 * stored on disk (by virtue of being incorporated into other on-disk 258 * structures, e.g. dsl_scan_phys_t). 259 */ 260 typedef struct zbookmark_phys { 261 uint64_t zb_objset; 262 uint64_t zb_object; 263 int64_t zb_level; 264 uint64_t zb_blkid; 265 } zbookmark_phys_t; 266 267 #define SET_BOOKMARK(zb, objset, object, level, blkid) \ 268 { \ 269 (zb)->zb_objset = objset; \ 270 (zb)->zb_object = object; \ 271 (zb)->zb_level = level; \ 272 (zb)->zb_blkid = blkid; \ 273 } 274 275 #define ZB_DESTROYED_OBJSET (-1ULL) 276 277 #define ZB_ROOT_OBJECT (0ULL) 278 #define ZB_ROOT_LEVEL (-1LL) 279 #define ZB_ROOT_BLKID (0ULL) 280 281 #define ZB_ZIL_OBJECT (0ULL) 282 #define ZB_ZIL_LEVEL (-2LL) 283 284 #define ZB_DNODE_LEVEL (-3LL) 285 #define ZB_DNODE_BLKID (0ULL) 286 287 #define ZB_IS_ZERO(zb) \ 288 ((zb)->zb_objset == 0 && (zb)->zb_object == 0 && \ 289 (zb)->zb_level == 0 && (zb)->zb_blkid == 0) 290 #define ZB_IS_ROOT(zb) \ 291 ((zb)->zb_object == ZB_ROOT_OBJECT && \ 292 (zb)->zb_level == ZB_ROOT_LEVEL && \ 293 (zb)->zb_blkid == ZB_ROOT_BLKID) 294 295 typedef struct zio_prop { 296 enum zio_checksum zp_checksum; 297 enum zio_compress zp_compress; 298 dmu_object_type_t zp_type; 299 uint8_t zp_level; 300 uint8_t zp_copies; 301 boolean_t zp_dedup; 302 boolean_t zp_dedup_verify; 303 boolean_t zp_nopwrite; 304 } zio_prop_t; 305 306 typedef struct zio_cksum_report zio_cksum_report_t; 307 308 typedef void zio_cksum_finish_f(zio_cksum_report_t *rep, 309 const void *good_data); 310 typedef void zio_cksum_free_f(void *cbdata, size_t size); 311 312 struct zio_bad_cksum; /* defined in zio_checksum.h */ 313 struct dnode_phys; 314 315 struct zio_cksum_report { 316 struct zio_cksum_report *zcr_next; 317 nvlist_t *zcr_ereport; 318 nvlist_t *zcr_detector; 319 void *zcr_cbdata; 320 size_t zcr_cbinfo; /* passed to zcr_free() */ 321 uint64_t zcr_align; 322 uint64_t zcr_length; 323 zio_cksum_finish_f *zcr_finish; 324 zio_cksum_free_f *zcr_free; 325 326 /* internal use only */ 327 struct zio_bad_cksum *zcr_ckinfo; /* information from failure */ 328 }; 329 330 typedef void zio_vsd_cksum_report_f(zio_t *zio, zio_cksum_report_t *zcr, 331 void *arg); 332 333 zio_vsd_cksum_report_f zio_vsd_default_cksum_report; 334 335 typedef struct zio_vsd_ops { 336 zio_done_func_t *vsd_free; 337 zio_vsd_cksum_report_f *vsd_cksum_report; 338 } zio_vsd_ops_t; 339 340 typedef struct zio_gang_node { 341 zio_gbh_phys_t *gn_gbh; 342 struct zio_gang_node *gn_child[SPA_GBH_NBLKPTRS]; 343 } zio_gang_node_t; 344 345 typedef zio_t *zio_gang_issue_func_t(zio_t *zio, blkptr_t *bp, 346 zio_gang_node_t *gn, void *data); 347 348 typedef void zio_transform_func_t(zio_t *zio, void *data, uint64_t size); 349 350 typedef struct zio_transform { 351 void *zt_orig_data; 352 uint64_t zt_orig_size; 353 uint64_t zt_bufsize; 354 zio_transform_func_t *zt_transform; 355 struct zio_transform *zt_next; 356 } zio_transform_t; 357 358 typedef int zio_pipe_stage_t(zio_t *zio); 359 360 /* 361 * The io_reexecute flags are distinct from io_flags because the child must 362 * be able to propagate them to the parent. The normal io_flags are local 363 * to the zio, not protected by any lock, and not modifiable by children; 364 * the reexecute flags are protected by io_lock, modifiable by children, 365 * and always propagated -- even when ZIO_FLAG_DONT_PROPAGATE is set. 366 */ 367 #define ZIO_REEXECUTE_NOW 0x01 368 #define ZIO_REEXECUTE_SUSPEND 0x02 369 370 typedef struct zio_link { 371 zio_t *zl_parent; 372 zio_t *zl_child; 373 list_node_t zl_parent_node; 374 list_node_t zl_child_node; 375 } zio_link_t; 376 377 struct zio { 378 /* Core information about this I/O */ 379 zbookmark_phys_t io_bookmark; 380 zio_prop_t io_prop; 381 zio_type_t io_type; 382 enum zio_child io_child_type; 383 int io_cmd; 384 zio_priority_t io_priority; 385 uint8_t io_reexecute; 386 uint8_t io_state[ZIO_WAIT_TYPES]; 387 uint64_t io_txg; 388 spa_t *io_spa; 389 blkptr_t *io_bp; 390 blkptr_t *io_bp_override; 391 blkptr_t io_bp_copy; 392 list_t io_parent_list; 393 list_t io_child_list; 394 zio_link_t *io_walk_link; 395 zio_t *io_logical; 396 zio_transform_t *io_transform_stack; 397 398 /* Callback info */ 399 zio_done_func_t *io_ready; 400 zio_done_func_t *io_physdone; 401 zio_done_func_t *io_done; 402 void *io_private; 403 int64_t io_prev_space_delta; /* DMU private */ 404 blkptr_t io_bp_orig; 405 406 /* Data represented by this I/O */ 407 void *io_data; 408 void *io_orig_data; 409 uint64_t io_size; 410 uint64_t io_orig_size; 411 412 /* Stuff for the vdev stack */ 413 vdev_t *io_vd; 414 void *io_vsd; 415 const zio_vsd_ops_t *io_vsd_ops; 416 417 uint64_t io_offset; 418 hrtime_t io_timestamp; 419 avl_node_t io_queue_node; 420 avl_node_t io_offset_node; 421 422 /* Internal pipeline state */ 423 enum zio_flag io_flags; 424 enum zio_stage io_stage; 425 enum zio_stage io_pipeline; 426 enum zio_flag io_orig_flags; 427 enum zio_stage io_orig_stage; 428 enum zio_stage io_orig_pipeline; 429 int io_error; 430 int io_child_error[ZIO_CHILD_TYPES]; 431 uint64_t io_children[ZIO_CHILD_TYPES][ZIO_WAIT_TYPES]; 432 uint64_t io_child_count; 433 uint64_t io_phys_children; 434 uint64_t io_parent_count; 435 uint64_t *io_stall; 436 zio_t *io_gang_leader; 437 zio_gang_node_t *io_gang_tree; 438 void *io_executor; 439 void *io_waiter; 440 kmutex_t io_lock; 441 kcondvar_t io_cv; 442 443 /* FMA state */ 444 zio_cksum_report_t *io_cksum_report; 445 uint64_t io_ena; 446 447 /* Taskq dispatching state */ 448 taskq_ent_t io_tqent; 449 }; 450 451 extern zio_t *zio_null(zio_t *pio, spa_t *spa, vdev_t *vd, 452 zio_done_func_t *done, void *private, enum zio_flag flags); 453 454 extern zio_t *zio_root(spa_t *spa, 455 zio_done_func_t *done, void *private, enum zio_flag flags); 456 457 extern zio_t *zio_read(zio_t *pio, spa_t *spa, const blkptr_t *bp, void *data, 458 uint64_t size, zio_done_func_t *done, void *private, 459 zio_priority_t priority, enum zio_flag flags, const zbookmark_phys_t *zb); 460 461 extern zio_t *zio_write(zio_t *pio, spa_t *spa, uint64_t txg, blkptr_t *bp, 462 void *data, uint64_t size, const zio_prop_t *zp, 463 zio_done_func_t *ready, zio_done_func_t *physdone, zio_done_func_t *done, 464 void *private, 465 zio_priority_t priority, enum zio_flag flags, const zbookmark_phys_t *zb); 466 467 extern zio_t *zio_rewrite(zio_t *pio, spa_t *spa, uint64_t txg, blkptr_t *bp, 468 void *data, uint64_t size, zio_done_func_t *done, void *private, 469 zio_priority_t priority, enum zio_flag flags, zbookmark_phys_t *zb); 470 471 extern void zio_write_override(zio_t *zio, blkptr_t *bp, int copies, 472 boolean_t nopwrite); 473 474 extern void zio_free(spa_t *spa, uint64_t txg, const blkptr_t *bp); 475 476 extern zio_t *zio_claim(zio_t *pio, spa_t *spa, uint64_t txg, 477 const blkptr_t *bp, 478 zio_done_func_t *done, void *private, enum zio_flag flags); 479 480 extern zio_t *zio_ioctl(zio_t *pio, spa_t *spa, vdev_t *vd, int cmd, 481 zio_done_func_t *done, void *private, enum zio_flag flags); 482 483 extern zio_t *zio_read_phys(zio_t *pio, vdev_t *vd, uint64_t offset, 484 uint64_t size, void *data, int checksum, 485 zio_done_func_t *done, void *private, zio_priority_t priority, 486 enum zio_flag flags, boolean_t labels); 487 488 extern zio_t *zio_write_phys(zio_t *pio, vdev_t *vd, uint64_t offset, 489 uint64_t size, void *data, int checksum, 490 zio_done_func_t *done, void *private, zio_priority_t priority, 491 enum zio_flag flags, boolean_t labels); 492 493 extern zio_t *zio_free_sync(zio_t *pio, spa_t *spa, uint64_t txg, 494 const blkptr_t *bp, enum zio_flag flags); 495 496 extern int zio_alloc_zil(spa_t *spa, uint64_t txg, blkptr_t *new_bp, 497 blkptr_t *old_bp, uint64_t size, boolean_t use_slog); 498 extern void zio_free_zil(spa_t *spa, uint64_t txg, blkptr_t *bp); 499 extern void zio_flush(zio_t *zio, vdev_t *vd); 500 extern void zio_shrink(zio_t *zio, uint64_t size); 501 502 extern int zio_wait(zio_t *zio); 503 extern void zio_nowait(zio_t *zio); 504 extern void zio_execute(zio_t *zio); 505 extern void zio_interrupt(zio_t *zio); 506 507 extern zio_t *zio_walk_parents(zio_t *cio); 508 extern zio_t *zio_walk_children(zio_t *pio); 509 extern zio_t *zio_unique_parent(zio_t *cio); 510 extern void zio_add_child(zio_t *pio, zio_t *cio); 511 512 extern void *zio_buf_alloc(size_t size); 513 extern void zio_buf_free(void *buf, size_t size); 514 extern void *zio_data_buf_alloc(size_t size); 515 extern void zio_data_buf_free(void *buf, size_t size); 516 517 extern void zio_resubmit_stage_async(void *); 518 519 extern zio_t *zio_vdev_child_io(zio_t *zio, blkptr_t *bp, vdev_t *vd, 520 uint64_t offset, void *data, uint64_t size, int type, 521 zio_priority_t priority, enum zio_flag flags, 522 zio_done_func_t *done, void *private); 523 524 extern zio_t *zio_vdev_delegated_io(vdev_t *vd, uint64_t offset, 525 void *data, uint64_t size, int type, zio_priority_t priority, 526 enum zio_flag flags, zio_done_func_t *done, void *private); 527 528 extern void zio_vdev_io_bypass(zio_t *zio); 529 extern void zio_vdev_io_reissue(zio_t *zio); 530 extern void zio_vdev_io_redone(zio_t *zio); 531 532 extern void zio_checksum_verified(zio_t *zio); 533 extern int zio_worst_error(int e1, int e2); 534 535 extern enum zio_checksum zio_checksum_select(enum zio_checksum child, 536 enum zio_checksum parent); 537 extern enum zio_checksum zio_checksum_dedup_select(spa_t *spa, 538 enum zio_checksum child, enum zio_checksum parent); 539 extern enum zio_compress zio_compress_select(spa_t *spa, 540 enum zio_compress child, enum zio_compress parent); 541 542 extern void zio_suspend(spa_t *spa, zio_t *zio); 543 extern int zio_resume(spa_t *spa); 544 extern void zio_resume_wait(spa_t *spa); 545 546 /* 547 * Initial setup and teardown. 548 */ 549 extern void zio_init(void); 550 extern void zio_fini(void); 551 552 /* 553 * Fault injection 554 */ 555 struct zinject_record; 556 extern uint32_t zio_injection_enabled; 557 extern int zio_inject_fault(char *name, int flags, int *id, 558 struct zinject_record *record); 559 extern int zio_inject_list_next(int *id, char *name, size_t buflen, 560 struct zinject_record *record); 561 extern int zio_clear_fault(int id); 562 extern void zio_handle_panic_injection(spa_t *spa, char *tag, uint64_t type); 563 extern int zio_handle_fault_injection(zio_t *zio, int error); 564 extern int zio_handle_device_injection(vdev_t *vd, zio_t *zio, int error); 565 extern int zio_handle_label_injection(zio_t *zio, int error); 566 extern void zio_handle_ignored_writes(zio_t *zio); 567 extern uint64_t zio_handle_io_delay(zio_t *zio); 568 569 /* 570 * Checksum ereport functions 571 */ 572 extern void zfs_ereport_start_checksum(spa_t *spa, vdev_t *vd, struct zio *zio, 573 uint64_t offset, uint64_t length, void *arg, struct zio_bad_cksum *info); 574 extern void zfs_ereport_finish_checksum(zio_cksum_report_t *report, 575 const void *good_data, const void *bad_data, boolean_t drop_if_identical); 576 577 extern void zfs_ereport_send_interim_checksum(zio_cksum_report_t *report); 578 extern void zfs_ereport_free_checksum(zio_cksum_report_t *report); 579 580 /* If we have the good data in hand, this function can be used */ 581 extern void zfs_ereport_post_checksum(spa_t *spa, vdev_t *vd, 582 struct zio *zio, uint64_t offset, uint64_t length, 583 const void *good_data, const void *bad_data, struct zio_bad_cksum *info); 584 585 /* Called from spa_sync(), but primarily an injection handler */ 586 extern void spa_handle_ignored_writes(spa_t *spa); 587 588 /* zbookmark_phys functions */ 589 boolean_t zbookmark_subtree_completed(const struct dnode_phys *dnp, 590 const zbookmark_phys_t *subtree_root, const zbookmark_phys_t *last_block); 591 int zbookmark_compare(uint16_t dbss1, uint8_t ibs1, uint16_t dbss2, 592 uint8_t ibs2, const zbookmark_phys_t *zb1, const zbookmark_phys_t *zb2); 593 594 #ifdef __cplusplus 595 } 596 #endif 597 598 #endif /* _ZIO_H */ 599