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 * Copyright (c) 2013 by Saso Kiselkov. 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_LZ4, 111 ZIO_COMPRESS_FUNCTIONS 112 }; 113 114 /* N.B. when altering this value, also change BOOTFS_COMPRESS_VALID below */ 115 #define ZIO_COMPRESS_ON_VALUE ZIO_COMPRESS_LZJB 116 #define ZIO_COMPRESS_DEFAULT ZIO_COMPRESS_OFF 117 118 #define BOOTFS_COMPRESS_VALID(compress) \ 119 ((compress) == ZIO_COMPRESS_LZJB || \ 120 (compress) == ZIO_COMPRESS_LZ4 || \ 121 ((compress) == ZIO_COMPRESS_ON && \ 122 ZIO_COMPRESS_ON_VALUE == ZIO_COMPRESS_LZJB) || \ 123 (compress) == ZIO_COMPRESS_OFF) 124 125 #define ZIO_FAILURE_MODE_WAIT 0 126 #define ZIO_FAILURE_MODE_CONTINUE 1 127 #define ZIO_FAILURE_MODE_PANIC 2 128 129 #define ZIO_PRIORITY_NOW (zio_priority_table[0]) 130 #define ZIO_PRIORITY_SYNC_READ (zio_priority_table[1]) 131 #define ZIO_PRIORITY_SYNC_WRITE (zio_priority_table[2]) 132 #define ZIO_PRIORITY_LOG_WRITE (zio_priority_table[3]) 133 #define ZIO_PRIORITY_CACHE_FILL (zio_priority_table[4]) 134 #define ZIO_PRIORITY_AGG (zio_priority_table[5]) 135 #define ZIO_PRIORITY_FREE (zio_priority_table[6]) 136 #define ZIO_PRIORITY_ASYNC_WRITE (zio_priority_table[7]) 137 #define ZIO_PRIORITY_ASYNC_READ (zio_priority_table[8]) 138 #define ZIO_PRIORITY_RESILVER (zio_priority_table[9]) 139 #define ZIO_PRIORITY_SCRUB (zio_priority_table[10]) 140 #define ZIO_PRIORITY_DDT_PREFETCH (zio_priority_table[11]) 141 #define ZIO_PRIORITY_TABLE_SIZE 12 142 143 #define ZIO_PIPELINE_CONTINUE 0x100 144 #define ZIO_PIPELINE_STOP 0x101 145 146 enum zio_flag { 147 /* 148 * Flags inherited by gang, ddt, and vdev children, 149 * and that must be equal for two zios to aggregate 150 */ 151 ZIO_FLAG_DONT_AGGREGATE = 1 << 0, 152 ZIO_FLAG_IO_REPAIR = 1 << 1, 153 ZIO_FLAG_SELF_HEAL = 1 << 2, 154 ZIO_FLAG_RESILVER = 1 << 3, 155 ZIO_FLAG_SCRUB = 1 << 4, 156 ZIO_FLAG_SCAN_THREAD = 1 << 5, 157 158 #define ZIO_FLAG_AGG_INHERIT (ZIO_FLAG_CANFAIL - 1) 159 160 /* 161 * Flags inherited by ddt, gang, and vdev children. 162 */ 163 ZIO_FLAG_CANFAIL = 1 << 6, /* must be first for INHERIT */ 164 ZIO_FLAG_SPECULATIVE = 1 << 7, 165 ZIO_FLAG_CONFIG_WRITER = 1 << 8, 166 ZIO_FLAG_DONT_RETRY = 1 << 9, 167 ZIO_FLAG_DONT_CACHE = 1 << 10, 168 ZIO_FLAG_NODATA = 1 << 11, 169 ZIO_FLAG_INDUCE_DAMAGE = 1 << 12, 170 171 #define ZIO_FLAG_DDT_INHERIT (ZIO_FLAG_IO_RETRY - 1) 172 #define ZIO_FLAG_GANG_INHERIT (ZIO_FLAG_IO_RETRY - 1) 173 174 /* 175 * Flags inherited by vdev children. 176 */ 177 ZIO_FLAG_IO_RETRY = 1 << 13, /* must be first for INHERIT */ 178 ZIO_FLAG_PROBE = 1 << 14, 179 ZIO_FLAG_TRYHARD = 1 << 15, 180 ZIO_FLAG_OPTIONAL = 1 << 16, 181 182 #define ZIO_FLAG_VDEV_INHERIT (ZIO_FLAG_DONT_QUEUE - 1) 183 184 /* 185 * Flags not inherited by any children. 186 */ 187 ZIO_FLAG_DONT_QUEUE = 1 << 17, /* must be first for INHERIT */ 188 ZIO_FLAG_DONT_PROPAGATE = 1 << 18, 189 ZIO_FLAG_IO_BYPASS = 1 << 19, 190 ZIO_FLAG_IO_REWRITE = 1 << 20, 191 ZIO_FLAG_RAW = 1 << 21, 192 ZIO_FLAG_GANG_CHILD = 1 << 22, 193 ZIO_FLAG_DDT_CHILD = 1 << 23, 194 ZIO_FLAG_GODFATHER = 1 << 24, 195 ZIO_FLAG_NOPWRITE = 1 << 25, 196 ZIO_FLAG_REEXECUTED = 1 << 26, 197 }; 198 199 #define ZIO_FLAG_MUSTSUCCEED 0 200 201 #define ZIO_DDT_CHILD_FLAGS(zio) \ 202 (((zio)->io_flags & ZIO_FLAG_DDT_INHERIT) | \ 203 ZIO_FLAG_DDT_CHILD | ZIO_FLAG_CANFAIL) 204 205 #define ZIO_GANG_CHILD_FLAGS(zio) \ 206 (((zio)->io_flags & ZIO_FLAG_GANG_INHERIT) | \ 207 ZIO_FLAG_GANG_CHILD | ZIO_FLAG_CANFAIL) 208 209 #define ZIO_VDEV_CHILD_FLAGS(zio) \ 210 (((zio)->io_flags & ZIO_FLAG_VDEV_INHERIT) | \ 211 ZIO_FLAG_CANFAIL) 212 213 enum zio_child { 214 ZIO_CHILD_VDEV = 0, 215 ZIO_CHILD_GANG, 216 ZIO_CHILD_DDT, 217 ZIO_CHILD_LOGICAL, 218 ZIO_CHILD_TYPES 219 }; 220 221 enum zio_wait_type { 222 ZIO_WAIT_READY = 0, 223 ZIO_WAIT_DONE, 224 ZIO_WAIT_TYPES 225 }; 226 227 /* 228 * We'll take the unused errnos, 'EBADE' and 'EBADR' (from the Convergent 229 * graveyard) to indicate checksum errors and fragmentation. 230 */ 231 #define ECKSUM EBADE 232 #define EFRAGS EBADR 233 234 typedef void zio_done_func_t(zio_t *zio); 235 236 extern uint8_t zio_priority_table[ZIO_PRIORITY_TABLE_SIZE]; 237 extern char *zio_type_name[ZIO_TYPES]; 238 239 /* 240 * A bookmark is a four-tuple <objset, object, level, blkid> that uniquely 241 * identifies any block in the pool. By convention, the meta-objset (MOS) 242 * is objset 0, and the meta-dnode is object 0. This covers all blocks 243 * except root blocks and ZIL blocks, which are defined as follows: 244 * 245 * Root blocks (objset_phys_t) are object 0, level -1: <objset, 0, -1, 0>. 246 * ZIL blocks are bookmarked <objset, 0, -2, blkid == ZIL sequence number>. 247 * dmu_sync()ed ZIL data blocks are bookmarked <objset, object, -2, blkid>. 248 * 249 * Note: this structure is called a bookmark because its original purpose 250 * was to remember where to resume a pool-wide traverse. 251 * 252 * Note: this structure is passed between userland and the kernel. 253 * Therefore it must not change size or alignment between 32/64 bit 254 * compilation options. 255 */ 256 typedef struct zbookmark { 257 uint64_t zb_objset; 258 uint64_t zb_object; 259 int64_t zb_level; 260 uint64_t zb_blkid; 261 } zbookmark_t; 262 263 #define SET_BOOKMARK(zb, objset, object, level, blkid) \ 264 { \ 265 (zb)->zb_objset = objset; \ 266 (zb)->zb_object = object; \ 267 (zb)->zb_level = level; \ 268 (zb)->zb_blkid = blkid; \ 269 } 270 271 #define ZB_DESTROYED_OBJSET (-1ULL) 272 273 #define ZB_ROOT_OBJECT (0ULL) 274 #define ZB_ROOT_LEVEL (-1LL) 275 #define ZB_ROOT_BLKID (0ULL) 276 277 #define ZB_ZIL_OBJECT (0ULL) 278 #define ZB_ZIL_LEVEL (-2LL) 279 280 #define ZB_IS_ZERO(zb) \ 281 ((zb)->zb_objset == 0 && (zb)->zb_object == 0 && \ 282 (zb)->zb_level == 0 && (zb)->zb_blkid == 0) 283 #define ZB_IS_ROOT(zb) \ 284 ((zb)->zb_object == ZB_ROOT_OBJECT && \ 285 (zb)->zb_level == ZB_ROOT_LEVEL && \ 286 (zb)->zb_blkid == ZB_ROOT_BLKID) 287 288 typedef struct zio_prop { 289 enum zio_checksum zp_checksum; 290 enum zio_compress zp_compress; 291 dmu_object_type_t zp_type; 292 uint8_t zp_level; 293 uint8_t zp_copies; 294 boolean_t zp_dedup; 295 boolean_t zp_dedup_verify; 296 boolean_t zp_nopwrite; 297 } zio_prop_t; 298 299 typedef struct zio_cksum_report zio_cksum_report_t; 300 301 typedef void zio_cksum_finish_f(zio_cksum_report_t *rep, 302 const void *good_data); 303 typedef void zio_cksum_free_f(void *cbdata, size_t size); 304 305 struct zio_bad_cksum; /* defined in zio_checksum.h */ 306 struct dnode_phys; 307 308 struct zio_cksum_report { 309 struct zio_cksum_report *zcr_next; 310 nvlist_t *zcr_ereport; 311 nvlist_t *zcr_detector; 312 void *zcr_cbdata; 313 size_t zcr_cbinfo; /* passed to zcr_free() */ 314 uint64_t zcr_align; 315 uint64_t zcr_length; 316 zio_cksum_finish_f *zcr_finish; 317 zio_cksum_free_f *zcr_free; 318 319 /* internal use only */ 320 struct zio_bad_cksum *zcr_ckinfo; /* information from failure */ 321 }; 322 323 typedef void zio_vsd_cksum_report_f(zio_t *zio, zio_cksum_report_t *zcr, 324 void *arg); 325 326 zio_vsd_cksum_report_f zio_vsd_default_cksum_report; 327 328 typedef struct zio_vsd_ops { 329 zio_done_func_t *vsd_free; 330 zio_vsd_cksum_report_f *vsd_cksum_report; 331 } zio_vsd_ops_t; 332 333 typedef struct zio_gang_node { 334 zio_gbh_phys_t *gn_gbh; 335 struct zio_gang_node *gn_child[SPA_GBH_NBLKPTRS]; 336 } zio_gang_node_t; 337 338 typedef zio_t *zio_gang_issue_func_t(zio_t *zio, blkptr_t *bp, 339 zio_gang_node_t *gn, void *data); 340 341 typedef void zio_transform_func_t(zio_t *zio, void *data, uint64_t size); 342 343 typedef struct zio_transform { 344 void *zt_orig_data; 345 uint64_t zt_orig_size; 346 uint64_t zt_bufsize; 347 zio_transform_func_t *zt_transform; 348 struct zio_transform *zt_next; 349 } zio_transform_t; 350 351 typedef int zio_pipe_stage_t(zio_t *zio); 352 353 /* 354 * The io_reexecute flags are distinct from io_flags because the child must 355 * be able to propagate them to the parent. The normal io_flags are local 356 * to the zio, not protected by any lock, and not modifiable by children; 357 * the reexecute flags are protected by io_lock, modifiable by children, 358 * and always propagated -- even when ZIO_FLAG_DONT_PROPAGATE is set. 359 */ 360 #define ZIO_REEXECUTE_NOW 0x01 361 #define ZIO_REEXECUTE_SUSPEND 0x02 362 363 typedef struct zio_link { 364 zio_t *zl_parent; 365 zio_t *zl_child; 366 list_node_t zl_parent_node; 367 list_node_t zl_child_node; 368 } zio_link_t; 369 370 struct zio { 371 /* Core information about this I/O */ 372 zbookmark_t io_bookmark; 373 zio_prop_t io_prop; 374 zio_type_t io_type; 375 enum zio_child io_child_type; 376 int io_cmd; 377 uint8_t io_priority; 378 uint8_t io_reexecute; 379 uint8_t io_state[ZIO_WAIT_TYPES]; 380 uint64_t io_txg; 381 spa_t *io_spa; 382 blkptr_t *io_bp; 383 blkptr_t *io_bp_override; 384 blkptr_t io_bp_copy; 385 list_t io_parent_list; 386 list_t io_child_list; 387 zio_link_t *io_walk_link; 388 zio_t *io_logical; 389 zio_transform_t *io_transform_stack; 390 391 /* Callback info */ 392 zio_done_func_t *io_ready; 393 zio_done_func_t *io_done; 394 void *io_private; 395 int64_t io_prev_space_delta; /* DMU private */ 396 blkptr_t io_bp_orig; 397 398 /* Data represented by this I/O */ 399 void *io_data; 400 void *io_orig_data; 401 uint64_t io_size; 402 uint64_t io_orig_size; 403 404 /* Stuff for the vdev stack */ 405 vdev_t *io_vd; 406 void *io_vsd; 407 const zio_vsd_ops_t *io_vsd_ops; 408 409 uint64_t io_offset; 410 uint64_t io_deadline; 411 hrtime_t io_timestamp; 412 avl_node_t io_offset_node; 413 avl_node_t io_deadline_node; 414 avl_tree_t *io_vdev_tree; 415 416 /* Internal pipeline state */ 417 enum zio_flag io_flags; 418 enum zio_stage io_stage; 419 enum zio_stage io_pipeline; 420 enum zio_flag io_orig_flags; 421 enum zio_stage io_orig_stage; 422 enum zio_stage io_orig_pipeline; 423 int io_error; 424 int io_child_error[ZIO_CHILD_TYPES]; 425 uint64_t io_children[ZIO_CHILD_TYPES][ZIO_WAIT_TYPES]; 426 uint64_t io_child_count; 427 uint64_t io_parent_count; 428 uint64_t *io_stall; 429 zio_t *io_gang_leader; 430 zio_gang_node_t *io_gang_tree; 431 void *io_executor; 432 void *io_waiter; 433 kmutex_t io_lock; 434 kcondvar_t io_cv; 435 436 /* FMA state */ 437 zio_cksum_report_t *io_cksum_report; 438 uint64_t io_ena; 439 440 /* Taskq dispatching state */ 441 taskq_ent_t io_tqent; 442 }; 443 444 extern zio_t *zio_null(zio_t *pio, spa_t *spa, vdev_t *vd, 445 zio_done_func_t *done, void *private, enum zio_flag flags); 446 447 extern zio_t *zio_root(spa_t *spa, 448 zio_done_func_t *done, void *private, enum zio_flag flags); 449 450 extern zio_t *zio_read(zio_t *pio, spa_t *spa, const blkptr_t *bp, void *data, 451 uint64_t size, zio_done_func_t *done, void *private, 452 int priority, enum zio_flag flags, const zbookmark_t *zb); 453 454 extern zio_t *zio_write(zio_t *pio, spa_t *spa, uint64_t txg, blkptr_t *bp, 455 void *data, uint64_t size, const zio_prop_t *zp, 456 zio_done_func_t *ready, zio_done_func_t *done, void *private, 457 int priority, enum zio_flag flags, const zbookmark_t *zb); 458 459 extern zio_t *zio_rewrite(zio_t *pio, spa_t *spa, uint64_t txg, blkptr_t *bp, 460 void *data, uint64_t size, zio_done_func_t *done, void *private, 461 int priority, enum zio_flag flags, zbookmark_t *zb); 462 463 extern void zio_write_override(zio_t *zio, blkptr_t *bp, int copies, 464 boolean_t nopwrite); 465 466 extern void zio_free(spa_t *spa, uint64_t txg, const blkptr_t *bp); 467 468 extern zio_t *zio_claim(zio_t *pio, spa_t *spa, uint64_t txg, 469 const blkptr_t *bp, 470 zio_done_func_t *done, void *private, enum zio_flag flags); 471 472 extern zio_t *zio_ioctl(zio_t *pio, spa_t *spa, vdev_t *vd, int cmd, 473 zio_done_func_t *done, void *private, int priority, enum zio_flag flags); 474 475 extern zio_t *zio_read_phys(zio_t *pio, vdev_t *vd, uint64_t offset, 476 uint64_t size, void *data, int checksum, 477 zio_done_func_t *done, void *private, int priority, enum zio_flag flags, 478 boolean_t labels); 479 480 extern zio_t *zio_write_phys(zio_t *pio, vdev_t *vd, uint64_t offset, 481 uint64_t size, void *data, int checksum, 482 zio_done_func_t *done, void *private, int priority, enum zio_flag flags, 483 boolean_t labels); 484 485 extern zio_t *zio_free_sync(zio_t *pio, spa_t *spa, uint64_t txg, 486 const blkptr_t *bp, enum zio_flag flags); 487 488 extern int zio_alloc_zil(spa_t *spa, uint64_t txg, blkptr_t *new_bp, 489 blkptr_t *old_bp, uint64_t size, boolean_t use_slog); 490 extern void zio_free_zil(spa_t *spa, uint64_t txg, blkptr_t *bp); 491 extern void zio_flush(zio_t *zio, vdev_t *vd); 492 extern void zio_shrink(zio_t *zio, uint64_t size); 493 494 extern int zio_wait(zio_t *zio); 495 extern void zio_nowait(zio_t *zio); 496 extern void zio_execute(zio_t *zio); 497 extern void zio_interrupt(zio_t *zio); 498 499 extern zio_t *zio_walk_parents(zio_t *cio); 500 extern zio_t *zio_walk_children(zio_t *pio); 501 extern zio_t *zio_unique_parent(zio_t *cio); 502 extern void zio_add_child(zio_t *pio, zio_t *cio); 503 504 extern void *zio_buf_alloc(size_t size); 505 extern void zio_buf_free(void *buf, size_t size); 506 extern void *zio_data_buf_alloc(size_t size); 507 extern void zio_data_buf_free(void *buf, size_t size); 508 509 extern void zio_resubmit_stage_async(void *); 510 511 extern zio_t *zio_vdev_child_io(zio_t *zio, blkptr_t *bp, vdev_t *vd, 512 uint64_t offset, void *data, uint64_t size, int type, int priority, 513 enum zio_flag flags, zio_done_func_t *done, void *private); 514 515 extern zio_t *zio_vdev_delegated_io(vdev_t *vd, uint64_t offset, 516 void *data, uint64_t size, int type, int priority, 517 enum zio_flag flags, zio_done_func_t *done, void *private); 518 519 extern void zio_vdev_io_bypass(zio_t *zio); 520 extern void zio_vdev_io_reissue(zio_t *zio); 521 extern void zio_vdev_io_redone(zio_t *zio); 522 523 extern void zio_checksum_verified(zio_t *zio); 524 extern int zio_worst_error(int e1, int e2); 525 526 extern enum zio_checksum zio_checksum_select(enum zio_checksum child, 527 enum zio_checksum parent); 528 extern enum zio_checksum zio_checksum_dedup_select(spa_t *spa, 529 enum zio_checksum child, enum zio_checksum parent); 530 extern enum zio_compress zio_compress_select(enum zio_compress child, 531 enum zio_compress parent); 532 533 extern void zio_suspend(spa_t *spa, zio_t *zio); 534 extern int zio_resume(spa_t *spa); 535 extern void zio_resume_wait(spa_t *spa); 536 537 /* 538 * Initial setup and teardown. 539 */ 540 extern void zio_init(void); 541 extern void zio_fini(void); 542 543 /* 544 * Fault injection 545 */ 546 struct zinject_record; 547 extern uint32_t zio_injection_enabled; 548 extern int zio_inject_fault(char *name, int flags, int *id, 549 struct zinject_record *record); 550 extern int zio_inject_list_next(int *id, char *name, size_t buflen, 551 struct zinject_record *record); 552 extern int zio_clear_fault(int id); 553 extern void zio_handle_panic_injection(spa_t *spa, char *tag, uint64_t type); 554 extern int zio_handle_fault_injection(zio_t *zio, int error); 555 extern int zio_handle_device_injection(vdev_t *vd, zio_t *zio, int error); 556 extern int zio_handle_label_injection(zio_t *zio, int error); 557 extern void zio_handle_ignored_writes(zio_t *zio); 558 extern uint64_t zio_handle_io_delay(zio_t *zio); 559 560 /* 561 * Checksum ereport functions 562 */ 563 extern void zfs_ereport_start_checksum(spa_t *spa, vdev_t *vd, struct zio *zio, 564 uint64_t offset, uint64_t length, void *arg, struct zio_bad_cksum *info); 565 extern void zfs_ereport_finish_checksum(zio_cksum_report_t *report, 566 const void *good_data, const void *bad_data, boolean_t drop_if_identical); 567 568 extern void zfs_ereport_send_interim_checksum(zio_cksum_report_t *report); 569 extern void zfs_ereport_free_checksum(zio_cksum_report_t *report); 570 571 /* If we have the good data in hand, this function can be used */ 572 extern void zfs_ereport_post_checksum(spa_t *spa, vdev_t *vd, 573 struct zio *zio, uint64_t offset, uint64_t length, 574 const void *good_data, const void *bad_data, struct zio_bad_cksum *info); 575 576 /* Called from spa_sync(), but primarily an injection handler */ 577 extern void spa_handle_ignored_writes(spa_t *spa); 578 579 /* zbookmark functions */ 580 boolean_t zbookmark_is_before(const struct dnode_phys *dnp, 581 const zbookmark_t *zb1, const zbookmark_t *zb2); 582 583 #ifdef __cplusplus 584 } 585 #endif 586 587 #endif /* _ZIO_H */ 588