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 by Delphix. All rights reserved. 26 */ 27 28 #ifndef _ZIO_H 29 #define _ZIO_H 30 31 #include <sys/zfs_context.h> 32 #include <sys/spa.h> 33 #include <sys/txg.h> 34 #include <sys/avl.h> 35 #include <sys/fs/zfs.h> 36 #include <sys/zio_impl.h> 37 38 #ifdef __cplusplus 39 extern "C" { 40 #endif 41 42 /* 43 * Embedded checksum 44 */ 45 #define ZEC_MAGIC 0x210da7ab10c7a11ULL 46 47 typedef struct zio_eck { 48 uint64_t zec_magic; /* for validation, endianness */ 49 zio_cksum_t zec_cksum; /* 256-bit checksum */ 50 } zio_eck_t; 51 52 /* 53 * Gang block headers are self-checksumming and contain an array 54 * of block pointers. 55 */ 56 #define SPA_GANGBLOCKSIZE SPA_MINBLOCKSIZE 57 #define SPA_GBH_NBLKPTRS ((SPA_GANGBLOCKSIZE - \ 58 sizeof (zio_eck_t)) / sizeof (blkptr_t)) 59 #define SPA_GBH_FILLER ((SPA_GANGBLOCKSIZE - \ 60 sizeof (zio_eck_t) - \ 61 (SPA_GBH_NBLKPTRS * sizeof (blkptr_t))) /\ 62 sizeof (uint64_t)) 63 64 typedef struct zio_gbh { 65 blkptr_t zg_blkptr[SPA_GBH_NBLKPTRS]; 66 uint64_t zg_filler[SPA_GBH_FILLER]; 67 zio_eck_t zg_tail; 68 } zio_gbh_phys_t; 69 70 enum zio_checksum { 71 ZIO_CHECKSUM_INHERIT = 0, 72 ZIO_CHECKSUM_ON, 73 ZIO_CHECKSUM_OFF, 74 ZIO_CHECKSUM_LABEL, 75 ZIO_CHECKSUM_GANG_HEADER, 76 ZIO_CHECKSUM_ZILOG, 77 ZIO_CHECKSUM_FLETCHER_2, 78 ZIO_CHECKSUM_FLETCHER_4, 79 ZIO_CHECKSUM_SHA256, 80 ZIO_CHECKSUM_ZILOG2, 81 ZIO_CHECKSUM_FUNCTIONS 82 }; 83 84 #define ZIO_CHECKSUM_ON_VALUE ZIO_CHECKSUM_FLETCHER_4 85 #define ZIO_CHECKSUM_DEFAULT ZIO_CHECKSUM_ON 86 87 #define ZIO_CHECKSUM_MASK 0xffULL 88 #define ZIO_CHECKSUM_VERIFY (1 << 8) 89 90 #define ZIO_DEDUPCHECKSUM ZIO_CHECKSUM_SHA256 91 #define ZIO_DEDUPDITTO_MIN 100 92 93 enum zio_compress { 94 ZIO_COMPRESS_INHERIT = 0, 95 ZIO_COMPRESS_ON, 96 ZIO_COMPRESS_OFF, 97 ZIO_COMPRESS_LZJB, 98 ZIO_COMPRESS_EMPTY, 99 ZIO_COMPRESS_GZIP_1, 100 ZIO_COMPRESS_GZIP_2, 101 ZIO_COMPRESS_GZIP_3, 102 ZIO_COMPRESS_GZIP_4, 103 ZIO_COMPRESS_GZIP_5, 104 ZIO_COMPRESS_GZIP_6, 105 ZIO_COMPRESS_GZIP_7, 106 ZIO_COMPRESS_GZIP_8, 107 ZIO_COMPRESS_GZIP_9, 108 ZIO_COMPRESS_ZLE, 109 ZIO_COMPRESS_FUNCTIONS 110 }; 111 112 #define ZIO_COMPRESS_ON_VALUE ZIO_COMPRESS_LZJB 113 #define ZIO_COMPRESS_DEFAULT ZIO_COMPRESS_OFF 114 115 #define BOOTFS_COMPRESS_VALID(compress) \ 116 ((compress) == ZIO_COMPRESS_LZJB || \ 117 ((compress) == ZIO_COMPRESS_ON && \ 118 ZIO_COMPRESS_ON_VALUE == ZIO_COMPRESS_LZJB) || \ 119 (compress) == ZIO_COMPRESS_OFF) 120 121 #define ZIO_FAILURE_MODE_WAIT 0 122 #define ZIO_FAILURE_MODE_CONTINUE 1 123 #define ZIO_FAILURE_MODE_PANIC 2 124 125 #define ZIO_PRIORITY_NOW (zio_priority_table[0]) 126 #define ZIO_PRIORITY_SYNC_READ (zio_priority_table[1]) 127 #define ZIO_PRIORITY_SYNC_WRITE (zio_priority_table[2]) 128 #define ZIO_PRIORITY_LOG_WRITE (zio_priority_table[3]) 129 #define ZIO_PRIORITY_CACHE_FILL (zio_priority_table[4]) 130 #define ZIO_PRIORITY_AGG (zio_priority_table[5]) 131 #define ZIO_PRIORITY_FREE (zio_priority_table[6]) 132 #define ZIO_PRIORITY_ASYNC_WRITE (zio_priority_table[7]) 133 #define ZIO_PRIORITY_ASYNC_READ (zio_priority_table[8]) 134 #define ZIO_PRIORITY_RESILVER (zio_priority_table[9]) 135 #define ZIO_PRIORITY_SCRUB (zio_priority_table[10]) 136 #define ZIO_PRIORITY_DDT_PREFETCH (zio_priority_table[11]) 137 #define ZIO_PRIORITY_TABLE_SIZE 12 138 139 #define ZIO_PIPELINE_CONTINUE 0x100 140 #define ZIO_PIPELINE_STOP 0x101 141 142 enum zio_flag { 143 /* 144 * Flags inherited by gang, ddt, and vdev children, 145 * and that must be equal for two zios to aggregate 146 */ 147 ZIO_FLAG_DONT_AGGREGATE = 1 << 0, 148 ZIO_FLAG_IO_REPAIR = 1 << 1, 149 ZIO_FLAG_SELF_HEAL = 1 << 2, 150 ZIO_FLAG_RESILVER = 1 << 3, 151 ZIO_FLAG_SCRUB = 1 << 4, 152 ZIO_FLAG_SCAN_THREAD = 1 << 5, 153 154 #define ZIO_FLAG_AGG_INHERIT (ZIO_FLAG_CANFAIL - 1) 155 156 /* 157 * Flags inherited by ddt, gang, and vdev children. 158 */ 159 ZIO_FLAG_CANFAIL = 1 << 6, /* must be first for INHERIT */ 160 ZIO_FLAG_SPECULATIVE = 1 << 7, 161 ZIO_FLAG_CONFIG_WRITER = 1 << 8, 162 ZIO_FLAG_DONT_RETRY = 1 << 9, 163 ZIO_FLAG_DONT_CACHE = 1 << 10, 164 ZIO_FLAG_NODATA = 1 << 11, 165 ZIO_FLAG_INDUCE_DAMAGE = 1 << 12, 166 167 #define ZIO_FLAG_DDT_INHERIT (ZIO_FLAG_IO_RETRY - 1) 168 #define ZIO_FLAG_GANG_INHERIT (ZIO_FLAG_IO_RETRY - 1) 169 170 /* 171 * Flags inherited by vdev children. 172 */ 173 ZIO_FLAG_IO_RETRY = 1 << 13, /* must be first for INHERIT */ 174 ZIO_FLAG_PROBE = 1 << 14, 175 ZIO_FLAG_TRYHARD = 1 << 15, 176 ZIO_FLAG_OPTIONAL = 1 << 16, 177 178 #define ZIO_FLAG_VDEV_INHERIT (ZIO_FLAG_DONT_QUEUE - 1) 179 180 /* 181 * Flags not inherited by any children. 182 */ 183 ZIO_FLAG_DONT_QUEUE = 1 << 17, /* must be first for INHERIT */ 184 ZIO_FLAG_DONT_PROPAGATE = 1 << 18, 185 ZIO_FLAG_IO_BYPASS = 1 << 19, 186 ZIO_FLAG_IO_REWRITE = 1 << 20, 187 ZIO_FLAG_RAW = 1 << 21, 188 ZIO_FLAG_GANG_CHILD = 1 << 22, 189 ZIO_FLAG_DDT_CHILD = 1 << 23, 190 ZIO_FLAG_GODFATHER = 1 << 24 191 }; 192 193 #define ZIO_FLAG_MUSTSUCCEED 0 194 195 #define ZIO_DDT_CHILD_FLAGS(zio) \ 196 (((zio)->io_flags & ZIO_FLAG_DDT_INHERIT) | \ 197 ZIO_FLAG_DDT_CHILD | ZIO_FLAG_CANFAIL) 198 199 #define ZIO_GANG_CHILD_FLAGS(zio) \ 200 (((zio)->io_flags & ZIO_FLAG_GANG_INHERIT) | \ 201 ZIO_FLAG_GANG_CHILD | ZIO_FLAG_CANFAIL) 202 203 #define ZIO_VDEV_CHILD_FLAGS(zio) \ 204 (((zio)->io_flags & ZIO_FLAG_VDEV_INHERIT) | \ 205 ZIO_FLAG_CANFAIL) 206 207 enum zio_child { 208 ZIO_CHILD_VDEV = 0, 209 ZIO_CHILD_GANG, 210 ZIO_CHILD_DDT, 211 ZIO_CHILD_LOGICAL, 212 ZIO_CHILD_TYPES 213 }; 214 215 enum zio_wait_type { 216 ZIO_WAIT_READY = 0, 217 ZIO_WAIT_DONE, 218 ZIO_WAIT_TYPES 219 }; 220 221 /* 222 * We'll take the unused errnos, 'EBADE' and 'EBADR' (from the Convergent 223 * graveyard) to indicate checksum errors and fragmentation. 224 */ 225 #define ECKSUM EBADE 226 #define EFRAGS EBADR 227 228 typedef void zio_done_func_t(zio_t *zio); 229 230 extern uint8_t zio_priority_table[ZIO_PRIORITY_TABLE_SIZE]; 231 extern char *zio_type_name[ZIO_TYPES]; 232 233 /* 234 * A bookmark is a four-tuple <objset, object, level, blkid> that uniquely 235 * identifies any block in the pool. By convention, the meta-objset (MOS) 236 * is objset 0, and the meta-dnode is object 0. This covers all blocks 237 * except root blocks and ZIL blocks, which are defined as follows: 238 * 239 * Root blocks (objset_phys_t) are object 0, level -1: <objset, 0, -1, 0>. 240 * ZIL blocks are bookmarked <objset, 0, -2, blkid == ZIL sequence number>. 241 * dmu_sync()ed ZIL data blocks are bookmarked <objset, object, -2, blkid>. 242 * 243 * Note: this structure is called a bookmark because its original purpose 244 * was to remember where to resume a pool-wide traverse. 245 * 246 * Note: this structure is passed between userland and the kernel. 247 * Therefore it must not change size or alignment between 32/64 bit 248 * compilation options. 249 */ 250 typedef struct zbookmark { 251 uint64_t zb_objset; 252 uint64_t zb_object; 253 int64_t zb_level; 254 uint64_t zb_blkid; 255 } zbookmark_t; 256 257 #define SET_BOOKMARK(zb, objset, object, level, blkid) \ 258 { \ 259 (zb)->zb_objset = objset; \ 260 (zb)->zb_object = object; \ 261 (zb)->zb_level = level; \ 262 (zb)->zb_blkid = blkid; \ 263 } 264 265 #define ZB_DESTROYED_OBJSET (-1ULL) 266 267 #define ZB_ROOT_OBJECT (0ULL) 268 #define ZB_ROOT_LEVEL (-1LL) 269 #define ZB_ROOT_BLKID (0ULL) 270 271 #define ZB_ZIL_OBJECT (0ULL) 272 #define ZB_ZIL_LEVEL (-2LL) 273 274 #define ZB_IS_ZERO(zb) \ 275 ((zb)->zb_objset == 0 && (zb)->zb_object == 0 && \ 276 (zb)->zb_level == 0 && (zb)->zb_blkid == 0) 277 #define ZB_IS_ROOT(zb) \ 278 ((zb)->zb_object == ZB_ROOT_OBJECT && \ 279 (zb)->zb_level == ZB_ROOT_LEVEL && \ 280 (zb)->zb_blkid == ZB_ROOT_BLKID) 281 282 typedef struct zio_prop { 283 enum zio_checksum zp_checksum; 284 enum zio_compress zp_compress; 285 dmu_object_type_t zp_type; 286 uint8_t zp_level; 287 uint8_t zp_copies; 288 uint8_t zp_dedup; 289 uint8_t zp_dedup_verify; 290 } zio_prop_t; 291 292 typedef struct zio_cksum_report zio_cksum_report_t; 293 294 typedef void zio_cksum_finish_f(zio_cksum_report_t *rep, 295 const void *good_data); 296 typedef void zio_cksum_free_f(void *cbdata, size_t size); 297 298 struct zio_bad_cksum; /* defined in zio_checksum.h */ 299 struct dnode_phys; 300 301 struct zio_cksum_report { 302 struct zio_cksum_report *zcr_next; 303 nvlist_t *zcr_ereport; 304 nvlist_t *zcr_detector; 305 void *zcr_cbdata; 306 size_t zcr_cbinfo; /* passed to zcr_free() */ 307 uint64_t zcr_align; 308 uint64_t zcr_length; 309 zio_cksum_finish_f *zcr_finish; 310 zio_cksum_free_f *zcr_free; 311 312 /* internal use only */ 313 struct zio_bad_cksum *zcr_ckinfo; /* information from failure */ 314 }; 315 316 typedef void zio_vsd_cksum_report_f(zio_t *zio, zio_cksum_report_t *zcr, 317 void *arg); 318 319 zio_vsd_cksum_report_f zio_vsd_default_cksum_report; 320 321 typedef struct zio_vsd_ops { 322 zio_done_func_t *vsd_free; 323 zio_vsd_cksum_report_f *vsd_cksum_report; 324 } zio_vsd_ops_t; 325 326 typedef struct zio_gang_node { 327 zio_gbh_phys_t *gn_gbh; 328 struct zio_gang_node *gn_child[SPA_GBH_NBLKPTRS]; 329 } zio_gang_node_t; 330 331 typedef zio_t *zio_gang_issue_func_t(zio_t *zio, blkptr_t *bp, 332 zio_gang_node_t *gn, void *data); 333 334 typedef void zio_transform_func_t(zio_t *zio, void *data, uint64_t size); 335 336 typedef struct zio_transform { 337 void *zt_orig_data; 338 uint64_t zt_orig_size; 339 uint64_t zt_bufsize; 340 zio_transform_func_t *zt_transform; 341 struct zio_transform *zt_next; 342 } zio_transform_t; 343 344 typedef int zio_pipe_stage_t(zio_t *zio); 345 346 /* 347 * The io_reexecute flags are distinct from io_flags because the child must 348 * be able to propagate them to the parent. The normal io_flags are local 349 * to the zio, not protected by any lock, and not modifiable by children; 350 * the reexecute flags are protected by io_lock, modifiable by children, 351 * and always propagated -- even when ZIO_FLAG_DONT_PROPAGATE is set. 352 */ 353 #define ZIO_REEXECUTE_NOW 0x01 354 #define ZIO_REEXECUTE_SUSPEND 0x02 355 356 typedef struct zio_link { 357 zio_t *zl_parent; 358 zio_t *zl_child; 359 list_node_t zl_parent_node; 360 list_node_t zl_child_node; 361 } zio_link_t; 362 363 struct zio { 364 /* Core information about this I/O */ 365 zbookmark_t io_bookmark; 366 zio_prop_t io_prop; 367 zio_type_t io_type; 368 enum zio_child io_child_type; 369 int io_cmd; 370 uint8_t io_priority; 371 uint8_t io_reexecute; 372 uint8_t io_state[ZIO_WAIT_TYPES]; 373 uint64_t io_txg; 374 spa_t *io_spa; 375 blkptr_t *io_bp; 376 blkptr_t *io_bp_override; 377 blkptr_t io_bp_copy; 378 list_t io_parent_list; 379 list_t io_child_list; 380 zio_link_t *io_walk_link; 381 zio_t *io_logical; 382 zio_transform_t *io_transform_stack; 383 384 /* Callback info */ 385 zio_done_func_t *io_ready; 386 zio_done_func_t *io_done; 387 void *io_private; 388 int64_t io_prev_space_delta; /* DMU private */ 389 blkptr_t io_bp_orig; 390 391 /* Data represented by this I/O */ 392 void *io_data; 393 void *io_orig_data; 394 uint64_t io_size; 395 uint64_t io_orig_size; 396 397 /* Stuff for the vdev stack */ 398 vdev_t *io_vd; 399 void *io_vsd; 400 const zio_vsd_ops_t *io_vsd_ops; 401 402 uint64_t io_offset; 403 uint64_t io_deadline; 404 uint64_t io_timestamp; 405 avl_node_t io_offset_node; 406 avl_node_t io_deadline_node; 407 avl_tree_t *io_vdev_tree; 408 409 /* Internal pipeline state */ 410 enum zio_flag io_flags; 411 enum zio_stage io_stage; 412 enum zio_stage io_pipeline; 413 enum zio_flag io_orig_flags; 414 enum zio_stage io_orig_stage; 415 enum zio_stage io_orig_pipeline; 416 int io_error; 417 int io_child_error[ZIO_CHILD_TYPES]; 418 uint64_t io_children[ZIO_CHILD_TYPES][ZIO_WAIT_TYPES]; 419 uint64_t io_child_count; 420 uint64_t io_parent_count; 421 uint64_t *io_stall; 422 zio_t *io_gang_leader; 423 zio_gang_node_t *io_gang_tree; 424 void *io_executor; 425 void *io_waiter; 426 kmutex_t io_lock; 427 kcondvar_t io_cv; 428 429 /* FMA state */ 430 zio_cksum_report_t *io_cksum_report; 431 uint64_t io_ena; 432 433 /* Taskq dispatching state */ 434 taskq_ent_t io_tqent; 435 }; 436 437 extern zio_t *zio_null(zio_t *pio, spa_t *spa, vdev_t *vd, 438 zio_done_func_t *done, void *private, enum zio_flag flags); 439 440 extern zio_t *zio_root(spa_t *spa, 441 zio_done_func_t *done, void *private, enum zio_flag flags); 442 443 extern zio_t *zio_read(zio_t *pio, spa_t *spa, const blkptr_t *bp, void *data, 444 uint64_t size, zio_done_func_t *done, void *private, 445 int priority, enum zio_flag flags, const zbookmark_t *zb); 446 447 extern zio_t *zio_write(zio_t *pio, spa_t *spa, uint64_t txg, blkptr_t *bp, 448 void *data, uint64_t size, const zio_prop_t *zp, 449 zio_done_func_t *ready, zio_done_func_t *done, void *private, 450 int priority, enum zio_flag flags, const zbookmark_t *zb); 451 452 extern zio_t *zio_rewrite(zio_t *pio, spa_t *spa, uint64_t txg, blkptr_t *bp, 453 void *data, uint64_t size, zio_done_func_t *done, void *private, 454 int priority, enum zio_flag flags, zbookmark_t *zb); 455 456 extern void zio_write_override(zio_t *zio, blkptr_t *bp, int copies); 457 458 extern void zio_free(spa_t *spa, uint64_t txg, const blkptr_t *bp); 459 460 extern zio_t *zio_claim(zio_t *pio, spa_t *spa, uint64_t txg, 461 const blkptr_t *bp, 462 zio_done_func_t *done, void *private, enum zio_flag flags); 463 464 extern zio_t *zio_ioctl(zio_t *pio, spa_t *spa, vdev_t *vd, int cmd, 465 zio_done_func_t *done, void *private, int priority, enum zio_flag flags); 466 467 extern zio_t *zio_read_phys(zio_t *pio, vdev_t *vd, uint64_t offset, 468 uint64_t size, void *data, int checksum, 469 zio_done_func_t *done, void *private, int priority, enum zio_flag flags, 470 boolean_t labels); 471 472 extern zio_t *zio_write_phys(zio_t *pio, vdev_t *vd, uint64_t offset, 473 uint64_t size, void *data, int checksum, 474 zio_done_func_t *done, void *private, int priority, enum zio_flag flags, 475 boolean_t labels); 476 477 extern zio_t *zio_free_sync(zio_t *pio, spa_t *spa, uint64_t txg, 478 const blkptr_t *bp, enum zio_flag flags); 479 480 extern int zio_alloc_zil(spa_t *spa, uint64_t txg, blkptr_t *new_bp, 481 blkptr_t *old_bp, uint64_t size, boolean_t use_slog); 482 extern void zio_free_zil(spa_t *spa, uint64_t txg, blkptr_t *bp); 483 extern void zio_flush(zio_t *zio, vdev_t *vd); 484 extern void zio_shrink(zio_t *zio, uint64_t size); 485 486 extern int zio_wait(zio_t *zio); 487 extern void zio_nowait(zio_t *zio); 488 extern void zio_execute(zio_t *zio); 489 extern void zio_interrupt(zio_t *zio); 490 491 extern zio_t *zio_walk_parents(zio_t *cio); 492 extern zio_t *zio_walk_children(zio_t *pio); 493 extern zio_t *zio_unique_parent(zio_t *cio); 494 extern void zio_add_child(zio_t *pio, zio_t *cio); 495 496 extern void *zio_buf_alloc(size_t size); 497 extern void zio_buf_free(void *buf, size_t size); 498 extern void *zio_data_buf_alloc(size_t size); 499 extern void zio_data_buf_free(void *buf, size_t size); 500 501 extern void zio_resubmit_stage_async(void *); 502 503 extern zio_t *zio_vdev_child_io(zio_t *zio, blkptr_t *bp, vdev_t *vd, 504 uint64_t offset, void *data, uint64_t size, int type, int priority, 505 enum zio_flag flags, zio_done_func_t *done, void *private); 506 507 extern zio_t *zio_vdev_delegated_io(vdev_t *vd, uint64_t offset, 508 void *data, uint64_t size, int type, int priority, 509 enum zio_flag flags, zio_done_func_t *done, void *private); 510 511 extern void zio_vdev_io_bypass(zio_t *zio); 512 extern void zio_vdev_io_reissue(zio_t *zio); 513 extern void zio_vdev_io_redone(zio_t *zio); 514 515 extern void zio_checksum_verified(zio_t *zio); 516 extern int zio_worst_error(int e1, int e2); 517 518 extern enum zio_checksum zio_checksum_select(enum zio_checksum child, 519 enum zio_checksum parent); 520 extern enum zio_checksum zio_checksum_dedup_select(spa_t *spa, 521 enum zio_checksum child, enum zio_checksum parent); 522 extern enum zio_compress zio_compress_select(enum zio_compress child, 523 enum zio_compress parent); 524 525 extern void zio_suspend(spa_t *spa, zio_t *zio); 526 extern int zio_resume(spa_t *spa); 527 extern void zio_resume_wait(spa_t *spa); 528 529 /* 530 * Initial setup and teardown. 531 */ 532 extern void zio_init(void); 533 extern void zio_fini(void); 534 535 /* 536 * Fault injection 537 */ 538 struct zinject_record; 539 extern uint32_t zio_injection_enabled; 540 extern int zio_inject_fault(char *name, int flags, int *id, 541 struct zinject_record *record); 542 extern int zio_inject_list_next(int *id, char *name, size_t buflen, 543 struct zinject_record *record); 544 extern int zio_clear_fault(int id); 545 extern void zio_handle_panic_injection(spa_t *spa, char *tag, uint64_t type); 546 extern int zio_handle_fault_injection(zio_t *zio, int error); 547 extern int zio_handle_device_injection(vdev_t *vd, zio_t *zio, int error); 548 extern int zio_handle_label_injection(zio_t *zio, int error); 549 extern void zio_handle_ignored_writes(zio_t *zio); 550 extern uint64_t zio_handle_io_delay(zio_t *zio); 551 552 /* 553 * Checksum ereport functions 554 */ 555 extern void zfs_ereport_start_checksum(spa_t *spa, vdev_t *vd, struct zio *zio, 556 uint64_t offset, uint64_t length, void *arg, struct zio_bad_cksum *info); 557 extern void zfs_ereport_finish_checksum(zio_cksum_report_t *report, 558 const void *good_data, const void *bad_data, boolean_t drop_if_identical); 559 560 extern void zfs_ereport_send_interim_checksum(zio_cksum_report_t *report); 561 extern void zfs_ereport_free_checksum(zio_cksum_report_t *report); 562 563 /* If we have the good data in hand, this function can be used */ 564 extern void zfs_ereport_post_checksum(spa_t *spa, vdev_t *vd, 565 struct zio *zio, uint64_t offset, uint64_t length, 566 const void *good_data, const void *bad_data, struct zio_bad_cksum *info); 567 568 /* Called from spa_sync(), but primarily an injection handler */ 569 extern void spa_handle_ignored_writes(spa_t *spa); 570 571 /* zbookmark functions */ 572 boolean_t zbookmark_is_before(const struct dnode_phys *dnp, 573 const zbookmark_t *zb1, const zbookmark_t *zb2); 574 575 #ifdef __cplusplus 576 } 577 #endif 578 579 #endif /* _ZIO_H */ 580