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 */ 25 /* 26 * Copyright 2011 Nexenta Systems, Inc. All rights reserved. 27 */ 28 29 #ifndef _ZIO_H 30 #define _ZIO_H 31 32 #include <sys/zfs_context.h> 33 #include <sys/spa.h> 34 #include <sys/txg.h> 35 #include <sys/avl.h> 36 #include <sys/fs/zfs.h> 37 #include <sys/zio_impl.h> 38 39 #ifdef __cplusplus 40 extern "C" { 41 #endif 42 43 /* 44 * Embedded checksum 45 */ 46 #define ZEC_MAGIC 0x210da7ab10c7a11ULL 47 48 typedef struct zio_eck { 49 uint64_t zec_magic; /* for validation, endianness */ 50 zio_cksum_t zec_cksum; /* 256-bit checksum */ 51 } zio_eck_t; 52 53 /* 54 * Gang block headers are self-checksumming and contain an array 55 * of block pointers. 56 */ 57 #define SPA_GANGBLOCKSIZE SPA_MINBLOCKSIZE 58 #define SPA_GBH_NBLKPTRS ((SPA_GANGBLOCKSIZE - \ 59 sizeof (zio_eck_t)) / sizeof (blkptr_t)) 60 #define SPA_GBH_FILLER ((SPA_GANGBLOCKSIZE - \ 61 sizeof (zio_eck_t) - \ 62 (SPA_GBH_NBLKPTRS * sizeof (blkptr_t))) /\ 63 sizeof (uint64_t)) 64 65 typedef struct zio_gbh { 66 blkptr_t zg_blkptr[SPA_GBH_NBLKPTRS]; 67 uint64_t zg_filler[SPA_GBH_FILLER]; 68 zio_eck_t zg_tail; 69 } zio_gbh_phys_t; 70 71 enum zio_checksum { 72 ZIO_CHECKSUM_INHERIT = 0, 73 ZIO_CHECKSUM_ON, 74 ZIO_CHECKSUM_OFF, 75 ZIO_CHECKSUM_LABEL, 76 ZIO_CHECKSUM_GANG_HEADER, 77 ZIO_CHECKSUM_ZILOG, 78 ZIO_CHECKSUM_FLETCHER_2, 79 ZIO_CHECKSUM_FLETCHER_4, 80 ZIO_CHECKSUM_SHA256, 81 ZIO_CHECKSUM_ZILOG2, 82 ZIO_CHECKSUM_FUNCTIONS 83 }; 84 85 #define ZIO_CHECKSUM_ON_VALUE ZIO_CHECKSUM_FLETCHER_4 86 #define ZIO_CHECKSUM_DEFAULT ZIO_CHECKSUM_ON 87 88 #define ZIO_CHECKSUM_MASK 0xffULL 89 #define ZIO_CHECKSUM_VERIFY (1 << 8) 90 91 #define ZIO_DEDUPCHECKSUM ZIO_CHECKSUM_SHA256 92 #define ZIO_DEDUPDITTO_MIN 100 93 94 enum zio_compress { 95 ZIO_COMPRESS_INHERIT = 0, 96 ZIO_COMPRESS_ON, 97 ZIO_COMPRESS_OFF, 98 ZIO_COMPRESS_LZJB, 99 ZIO_COMPRESS_EMPTY, 100 ZIO_COMPRESS_GZIP_1, 101 ZIO_COMPRESS_GZIP_2, 102 ZIO_COMPRESS_GZIP_3, 103 ZIO_COMPRESS_GZIP_4, 104 ZIO_COMPRESS_GZIP_5, 105 ZIO_COMPRESS_GZIP_6, 106 ZIO_COMPRESS_GZIP_7, 107 ZIO_COMPRESS_GZIP_8, 108 ZIO_COMPRESS_GZIP_9, 109 ZIO_COMPRESS_ZLE, 110 ZIO_COMPRESS_FUNCTIONS 111 }; 112 113 #define ZIO_COMPRESS_ON_VALUE ZIO_COMPRESS_LZJB 114 #define ZIO_COMPRESS_DEFAULT ZIO_COMPRESS_OFF 115 116 #define BOOTFS_COMPRESS_VALID(compress) \ 117 ((compress) == ZIO_COMPRESS_LZJB || \ 118 ((compress) == ZIO_COMPRESS_ON && \ 119 ZIO_COMPRESS_ON_VALUE == ZIO_COMPRESS_LZJB) || \ 120 (compress) == ZIO_COMPRESS_OFF) 121 122 #define ZIO_FAILURE_MODE_WAIT 0 123 #define ZIO_FAILURE_MODE_CONTINUE 1 124 #define ZIO_FAILURE_MODE_PANIC 2 125 126 #define ZIO_PRIORITY_NOW (zio_priority_table[0]) 127 #define ZIO_PRIORITY_SYNC_READ (zio_priority_table[1]) 128 #define ZIO_PRIORITY_SYNC_WRITE (zio_priority_table[2]) 129 #define ZIO_PRIORITY_LOG_WRITE (zio_priority_table[3]) 130 #define ZIO_PRIORITY_CACHE_FILL (zio_priority_table[4]) 131 #define ZIO_PRIORITY_AGG (zio_priority_table[5]) 132 #define ZIO_PRIORITY_FREE (zio_priority_table[6]) 133 #define ZIO_PRIORITY_ASYNC_WRITE (zio_priority_table[7]) 134 #define ZIO_PRIORITY_ASYNC_READ (zio_priority_table[8]) 135 #define ZIO_PRIORITY_RESILVER (zio_priority_table[9]) 136 #define ZIO_PRIORITY_SCRUB (zio_priority_table[10]) 137 #define ZIO_PRIORITY_DDT_PREFETCH (zio_priority_table[11]) 138 #define ZIO_PRIORITY_TABLE_SIZE 12 139 140 #define ZIO_PIPELINE_CONTINUE 0x100 141 #define ZIO_PIPELINE_STOP 0x101 142 143 enum zio_flag { 144 /* 145 * Flags inherited by gang, ddt, and vdev children, 146 * and that must be equal for two zios to aggregate 147 */ 148 ZIO_FLAG_DONT_AGGREGATE = 1 << 0, 149 ZIO_FLAG_IO_REPAIR = 1 << 1, 150 ZIO_FLAG_SELF_HEAL = 1 << 2, 151 ZIO_FLAG_RESILVER = 1 << 3, 152 ZIO_FLAG_SCRUB = 1 << 4, 153 ZIO_FLAG_SCAN_THREAD = 1 << 5, 154 155 #define ZIO_FLAG_AGG_INHERIT (ZIO_FLAG_CANFAIL - 1) 156 157 /* 158 * Flags inherited by ddt, gang, and vdev children. 159 */ 160 ZIO_FLAG_CANFAIL = 1 << 6, /* must be first for INHERIT */ 161 ZIO_FLAG_SPECULATIVE = 1 << 7, 162 ZIO_FLAG_CONFIG_WRITER = 1 << 8, 163 ZIO_FLAG_DONT_RETRY = 1 << 9, 164 ZIO_FLAG_DONT_CACHE = 1 << 10, 165 ZIO_FLAG_NODATA = 1 << 11, 166 ZIO_FLAG_INDUCE_DAMAGE = 1 << 12, 167 168 #define ZIO_FLAG_DDT_INHERIT (ZIO_FLAG_IO_RETRY - 1) 169 #define ZIO_FLAG_GANG_INHERIT (ZIO_FLAG_IO_RETRY - 1) 170 171 /* 172 * Flags inherited by vdev children. 173 */ 174 ZIO_FLAG_IO_RETRY = 1 << 13, /* must be first for INHERIT */ 175 ZIO_FLAG_PROBE = 1 << 14, 176 ZIO_FLAG_TRYHARD = 1 << 15, 177 ZIO_FLAG_OPTIONAL = 1 << 16, 178 179 #define ZIO_FLAG_VDEV_INHERIT (ZIO_FLAG_DONT_QUEUE - 1) 180 181 /* 182 * Flags not inherited by any children. 183 */ 184 ZIO_FLAG_DONT_QUEUE = 1 << 17, /* must be first for INHERIT */ 185 ZIO_FLAG_DONT_PROPAGATE = 1 << 18, 186 ZIO_FLAG_IO_BYPASS = 1 << 19, 187 ZIO_FLAG_IO_REWRITE = 1 << 20, 188 ZIO_FLAG_RAW = 1 << 21, 189 ZIO_FLAG_GANG_CHILD = 1 << 22, 190 ZIO_FLAG_DDT_CHILD = 1 << 23, 191 ZIO_FLAG_GODFATHER = 1 << 24 192 }; 193 194 #define ZIO_FLAG_MUSTSUCCEED 0 195 196 #define ZIO_DDT_CHILD_FLAGS(zio) \ 197 (((zio)->io_flags & ZIO_FLAG_DDT_INHERIT) | \ 198 ZIO_FLAG_DDT_CHILD | ZIO_FLAG_CANFAIL) 199 200 #define ZIO_GANG_CHILD_FLAGS(zio) \ 201 (((zio)->io_flags & ZIO_FLAG_GANG_INHERIT) | \ 202 ZIO_FLAG_GANG_CHILD | ZIO_FLAG_CANFAIL) 203 204 #define ZIO_VDEV_CHILD_FLAGS(zio) \ 205 (((zio)->io_flags & ZIO_FLAG_VDEV_INHERIT) | \ 206 ZIO_FLAG_CANFAIL) 207 208 enum zio_child { 209 ZIO_CHILD_VDEV = 0, 210 ZIO_CHILD_GANG, 211 ZIO_CHILD_DDT, 212 ZIO_CHILD_LOGICAL, 213 ZIO_CHILD_TYPES 214 }; 215 216 enum zio_wait_type { 217 ZIO_WAIT_READY = 0, 218 ZIO_WAIT_DONE, 219 ZIO_WAIT_TYPES 220 }; 221 222 /* 223 * We'll take the unused errnos, 'EBADE' and 'EBADR' (from the Convergent 224 * graveyard) to indicate checksum errors and fragmentation. 225 */ 226 #define ECKSUM EBADE 227 #define EFRAGS EBADR 228 229 typedef void zio_done_func_t(zio_t *zio); 230 231 extern uint8_t zio_priority_table[ZIO_PRIORITY_TABLE_SIZE]; 232 extern char *zio_type_name[ZIO_TYPES]; 233 234 /* 235 * A bookmark is a four-tuple <objset, object, level, blkid> that uniquely 236 * identifies any block in the pool. By convention, the meta-objset (MOS) 237 * is objset 0, and the meta-dnode is object 0. This covers all blocks 238 * except root blocks and ZIL blocks, which are defined as follows: 239 * 240 * Root blocks (objset_phys_t) are object 0, level -1: <objset, 0, -1, 0>. 241 * ZIL blocks are bookmarked <objset, 0, -2, blkid == ZIL sequence number>. 242 * dmu_sync()ed ZIL data blocks are bookmarked <objset, object, -2, blkid>. 243 * 244 * Note: this structure is called a bookmark because its original purpose 245 * was to remember where to resume a pool-wide traverse. 246 * 247 * Note: this structure is passed between userland and the kernel. 248 * Therefore it must not change size or alignment between 32/64 bit 249 * compilation options. 250 */ 251 typedef struct zbookmark { 252 uint64_t zb_objset; 253 uint64_t zb_object; 254 int64_t zb_level; 255 uint64_t zb_blkid; 256 } zbookmark_t; 257 258 #define SET_BOOKMARK(zb, objset, object, level, blkid) \ 259 { \ 260 (zb)->zb_objset = objset; \ 261 (zb)->zb_object = object; \ 262 (zb)->zb_level = level; \ 263 (zb)->zb_blkid = blkid; \ 264 } 265 266 #define ZB_DESTROYED_OBJSET (-1ULL) 267 268 #define ZB_ROOT_OBJECT (0ULL) 269 #define ZB_ROOT_LEVEL (-1LL) 270 #define ZB_ROOT_BLKID (0ULL) 271 272 #define ZB_ZIL_OBJECT (0ULL) 273 #define ZB_ZIL_LEVEL (-2LL) 274 275 typedef struct zio_prop { 276 enum zio_checksum zp_checksum; 277 enum zio_compress zp_compress; 278 dmu_object_type_t zp_type; 279 uint8_t zp_level; 280 uint8_t zp_copies; 281 uint8_t zp_dedup; 282 uint8_t zp_dedup_verify; 283 } zio_prop_t; 284 285 typedef struct zio_cksum_report zio_cksum_report_t; 286 287 typedef void zio_cksum_finish_f(zio_cksum_report_t *rep, 288 const void *good_data); 289 typedef void zio_cksum_free_f(void *cbdata, size_t size); 290 291 struct zio_bad_cksum; /* defined in zio_checksum.h */ 292 293 struct zio_cksum_report { 294 struct zio_cksum_report *zcr_next; 295 nvlist_t *zcr_ereport; 296 nvlist_t *zcr_detector; 297 void *zcr_cbdata; 298 size_t zcr_cbinfo; /* passed to zcr_free() */ 299 uint64_t zcr_align; 300 uint64_t zcr_length; 301 zio_cksum_finish_f *zcr_finish; 302 zio_cksum_free_f *zcr_free; 303 304 /* internal use only */ 305 struct zio_bad_cksum *zcr_ckinfo; /* information from failure */ 306 }; 307 308 typedef void zio_vsd_cksum_report_f(zio_t *zio, zio_cksum_report_t *zcr, 309 void *arg); 310 311 zio_vsd_cksum_report_f zio_vsd_default_cksum_report; 312 313 typedef struct zio_vsd_ops { 314 zio_done_func_t *vsd_free; 315 zio_vsd_cksum_report_f *vsd_cksum_report; 316 } zio_vsd_ops_t; 317 318 typedef struct zio_gang_node { 319 zio_gbh_phys_t *gn_gbh; 320 struct zio_gang_node *gn_child[SPA_GBH_NBLKPTRS]; 321 } zio_gang_node_t; 322 323 typedef zio_t *zio_gang_issue_func_t(zio_t *zio, blkptr_t *bp, 324 zio_gang_node_t *gn, void *data); 325 326 typedef void zio_transform_func_t(zio_t *zio, void *data, uint64_t size); 327 328 typedef struct zio_transform { 329 void *zt_orig_data; 330 uint64_t zt_orig_size; 331 uint64_t zt_bufsize; 332 zio_transform_func_t *zt_transform; 333 struct zio_transform *zt_next; 334 } zio_transform_t; 335 336 typedef int zio_pipe_stage_t(zio_t *zio); 337 338 /* 339 * The io_reexecute flags are distinct from io_flags because the child must 340 * be able to propagate them to the parent. The normal io_flags are local 341 * to the zio, not protected by any lock, and not modifiable by children; 342 * the reexecute flags are protected by io_lock, modifiable by children, 343 * and always propagated -- even when ZIO_FLAG_DONT_PROPAGATE is set. 344 */ 345 #define ZIO_REEXECUTE_NOW 0x01 346 #define ZIO_REEXECUTE_SUSPEND 0x02 347 348 typedef struct zio_link { 349 zio_t *zl_parent; 350 zio_t *zl_child; 351 list_node_t zl_parent_node; 352 list_node_t zl_child_node; 353 } zio_link_t; 354 355 struct zio { 356 /* Core information about this I/O */ 357 zbookmark_t io_bookmark; 358 zio_prop_t io_prop; 359 zio_type_t io_type; 360 enum zio_child io_child_type; 361 int io_cmd; 362 uint8_t io_priority; 363 uint8_t io_reexecute; 364 uint8_t io_state[ZIO_WAIT_TYPES]; 365 uint64_t io_txg; 366 spa_t *io_spa; 367 blkptr_t *io_bp; 368 blkptr_t *io_bp_override; 369 blkptr_t io_bp_copy; 370 list_t io_parent_list; 371 list_t io_child_list; 372 zio_link_t *io_walk_link; 373 zio_t *io_logical; 374 zio_transform_t *io_transform_stack; 375 376 /* Callback info */ 377 zio_done_func_t *io_ready; 378 zio_done_func_t *io_done; 379 void *io_private; 380 int64_t io_prev_space_delta; /* DMU private */ 381 blkptr_t io_bp_orig; 382 383 /* Data represented by this I/O */ 384 void *io_data; 385 void *io_orig_data; 386 uint64_t io_size; 387 uint64_t io_orig_size; 388 389 /* Stuff for the vdev stack */ 390 vdev_t *io_vd; 391 void *io_vsd; 392 const zio_vsd_ops_t *io_vsd_ops; 393 394 uint64_t io_offset; 395 uint64_t io_deadline; 396 avl_node_t io_offset_node; 397 avl_node_t io_deadline_node; 398 avl_tree_t *io_vdev_tree; 399 400 /* Internal pipeline state */ 401 enum zio_flag io_flags; 402 enum zio_stage io_stage; 403 enum zio_stage io_pipeline; 404 enum zio_flag io_orig_flags; 405 enum zio_stage io_orig_stage; 406 enum zio_stage io_orig_pipeline; 407 int io_error; 408 int io_child_error[ZIO_CHILD_TYPES]; 409 uint64_t io_children[ZIO_CHILD_TYPES][ZIO_WAIT_TYPES]; 410 uint64_t io_child_count; 411 uint64_t io_parent_count; 412 uint64_t *io_stall; 413 zio_t *io_gang_leader; 414 zio_gang_node_t *io_gang_tree; 415 void *io_executor; 416 void *io_waiter; 417 kmutex_t io_lock; 418 kcondvar_t io_cv; 419 420 /* FMA state */ 421 zio_cksum_report_t *io_cksum_report; 422 uint64_t io_ena; 423 424 /* Taskq dispatching state */ 425 taskq_ent_t io_tqent; 426 }; 427 428 extern zio_t *zio_null(zio_t *pio, spa_t *spa, vdev_t *vd, 429 zio_done_func_t *done, void *private, enum zio_flag flags); 430 431 extern zio_t *zio_root(spa_t *spa, 432 zio_done_func_t *done, void *private, enum zio_flag flags); 433 434 extern zio_t *zio_read(zio_t *pio, spa_t *spa, const blkptr_t *bp, void *data, 435 uint64_t size, zio_done_func_t *done, void *private, 436 int priority, enum zio_flag flags, const zbookmark_t *zb); 437 438 extern zio_t *zio_write(zio_t *pio, spa_t *spa, uint64_t txg, blkptr_t *bp, 439 void *data, uint64_t size, const zio_prop_t *zp, 440 zio_done_func_t *ready, zio_done_func_t *done, void *private, 441 int priority, enum zio_flag flags, const zbookmark_t *zb); 442 443 extern zio_t *zio_rewrite(zio_t *pio, spa_t *spa, uint64_t txg, blkptr_t *bp, 444 void *data, uint64_t size, zio_done_func_t *done, void *private, 445 int priority, enum zio_flag flags, zbookmark_t *zb); 446 447 extern void zio_write_override(zio_t *zio, blkptr_t *bp, int copies); 448 449 extern void zio_free(spa_t *spa, uint64_t txg, const blkptr_t *bp); 450 451 extern zio_t *zio_claim(zio_t *pio, spa_t *spa, uint64_t txg, 452 const blkptr_t *bp, 453 zio_done_func_t *done, void *private, enum zio_flag flags); 454 455 extern zio_t *zio_ioctl(zio_t *pio, spa_t *spa, vdev_t *vd, int cmd, 456 zio_done_func_t *done, void *private, int priority, enum zio_flag flags); 457 458 extern zio_t *zio_read_phys(zio_t *pio, vdev_t *vd, uint64_t offset, 459 uint64_t size, void *data, int checksum, 460 zio_done_func_t *done, void *private, int priority, enum zio_flag flags, 461 boolean_t labels); 462 463 extern zio_t *zio_write_phys(zio_t *pio, vdev_t *vd, uint64_t offset, 464 uint64_t size, void *data, int checksum, 465 zio_done_func_t *done, void *private, int priority, enum zio_flag flags, 466 boolean_t labels); 467 468 extern zio_t *zio_free_sync(zio_t *pio, spa_t *spa, uint64_t txg, 469 const blkptr_t *bp, enum zio_flag flags); 470 471 extern int zio_alloc_zil(spa_t *spa, uint64_t txg, blkptr_t *new_bp, 472 blkptr_t *old_bp, uint64_t size, boolean_t use_slog); 473 extern void zio_free_zil(spa_t *spa, uint64_t txg, blkptr_t *bp); 474 extern void zio_flush(zio_t *zio, vdev_t *vd); 475 extern void zio_shrink(zio_t *zio, uint64_t size); 476 477 extern int zio_wait(zio_t *zio); 478 extern void zio_nowait(zio_t *zio); 479 extern void zio_execute(zio_t *zio); 480 extern void zio_interrupt(zio_t *zio); 481 482 extern zio_t *zio_walk_parents(zio_t *cio); 483 extern zio_t *zio_walk_children(zio_t *pio); 484 extern zio_t *zio_unique_parent(zio_t *cio); 485 extern void zio_add_child(zio_t *pio, zio_t *cio); 486 487 extern void *zio_buf_alloc(size_t size); 488 extern void zio_buf_free(void *buf, size_t size); 489 extern void *zio_data_buf_alloc(size_t size); 490 extern void zio_data_buf_free(void *buf, size_t size); 491 492 extern void zio_resubmit_stage_async(void *); 493 494 extern zio_t *zio_vdev_child_io(zio_t *zio, blkptr_t *bp, vdev_t *vd, 495 uint64_t offset, void *data, uint64_t size, int type, int priority, 496 enum zio_flag flags, zio_done_func_t *done, void *private); 497 498 extern zio_t *zio_vdev_delegated_io(vdev_t *vd, uint64_t offset, 499 void *data, uint64_t size, int type, int priority, 500 enum zio_flag flags, zio_done_func_t *done, void *private); 501 502 extern void zio_vdev_io_bypass(zio_t *zio); 503 extern void zio_vdev_io_reissue(zio_t *zio); 504 extern void zio_vdev_io_redone(zio_t *zio); 505 506 extern void zio_checksum_verified(zio_t *zio); 507 extern int zio_worst_error(int e1, int e2); 508 509 extern enum zio_checksum zio_checksum_select(enum zio_checksum child, 510 enum zio_checksum parent); 511 extern enum zio_checksum zio_checksum_dedup_select(spa_t *spa, 512 enum zio_checksum child, enum zio_checksum parent); 513 extern enum zio_compress zio_compress_select(enum zio_compress child, 514 enum zio_compress parent); 515 516 extern void zio_suspend(spa_t *spa, zio_t *zio); 517 extern int zio_resume(spa_t *spa); 518 extern void zio_resume_wait(spa_t *spa); 519 520 /* 521 * Initial setup and teardown. 522 */ 523 extern void zio_init(void); 524 extern void zio_fini(void); 525 526 /* 527 * Fault injection 528 */ 529 struct zinject_record; 530 extern uint32_t zio_injection_enabled; 531 extern int zio_inject_fault(char *name, int flags, int *id, 532 struct zinject_record *record); 533 extern int zio_inject_list_next(int *id, char *name, size_t buflen, 534 struct zinject_record *record); 535 extern int zio_clear_fault(int id); 536 extern void zio_handle_panic_injection(spa_t *spa, char *tag, uint64_t type); 537 extern int zio_handle_fault_injection(zio_t *zio, int error); 538 extern int zio_handle_device_injection(vdev_t *vd, zio_t *zio, int error); 539 extern int zio_handle_label_injection(zio_t *zio, int error); 540 extern void zio_handle_ignored_writes(zio_t *zio); 541 542 /* 543 * Checksum ereport functions 544 */ 545 extern void zfs_ereport_start_checksum(spa_t *spa, vdev_t *vd, struct zio *zio, 546 uint64_t offset, uint64_t length, void *arg, struct zio_bad_cksum *info); 547 extern void zfs_ereport_finish_checksum(zio_cksum_report_t *report, 548 const void *good_data, const void *bad_data, boolean_t drop_if_identical); 549 550 extern void zfs_ereport_send_interim_checksum(zio_cksum_report_t *report); 551 extern void zfs_ereport_free_checksum(zio_cksum_report_t *report); 552 553 /* If we have the good data in hand, this function can be used */ 554 extern void zfs_ereport_post_checksum(spa_t *spa, vdev_t *vd, 555 struct zio *zio, uint64_t offset, uint64_t length, 556 const void *good_data, const void *bad_data, struct zio_bad_cksum *info); 557 558 /* Called from spa_sync(), but primarily an injection handler */ 559 extern void spa_handle_ignored_writes(spa_t *spa); 560 561 #ifdef __cplusplus 562 } 563 #endif 564 565 #endif /* _ZIO_H */ 566