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.
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.
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]
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, 2020 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 * Copyright 2016 Toomas Soome <tsoome@me.com>
29 * Copyright (c) 2019, Allan Jude
30 * Copyright (c) 2019, Klara Inc.
31 * Copyright (c) 2019-2020, Michael Niewöhner
37 #include <sys/zio_priority.h>
38 #include <sys/zfs_context.h>
42 #include <sys/fs/zfs.h>
43 #include <sys/zio_impl.h>
52 #define ZEC_MAGIC 0x210da7ab10c7a11ULL
54 typedef struct zio_eck {
55 uint64_t zec_magic; /* for validation, endianness */
56 zio_cksum_t zec_cksum; /* 256-bit checksum */
60 * Gang block headers are self-checksumming and contain an array
63 #define SPA_GANGBLOCKSIZE SPA_MINBLOCKSIZE
64 #define SPA_GBH_NBLKPTRS ((SPA_GANGBLOCKSIZE - \
65 sizeof (zio_eck_t)) / sizeof (blkptr_t))
66 #define SPA_GBH_FILLER ((SPA_GANGBLOCKSIZE - \
67 sizeof (zio_eck_t) - \
68 (SPA_GBH_NBLKPTRS * sizeof (blkptr_t))) /\
71 typedef struct zio_gbh {
72 blkptr_t zg_blkptr[SPA_GBH_NBLKPTRS];
73 uint64_t zg_filler[SPA_GBH_FILLER];
78 ZIO_CHECKSUM_INHERIT = 0,
82 ZIO_CHECKSUM_GANG_HEADER,
84 ZIO_CHECKSUM_FLETCHER_2,
85 ZIO_CHECKSUM_FLETCHER_4,
88 ZIO_CHECKSUM_NOPARITY,
93 ZIO_CHECKSUM_FUNCTIONS
97 * The number of "legacy" compression functions which can be set on individual
100 #define ZIO_CHECKSUM_LEGACY_FUNCTIONS ZIO_CHECKSUM_ZILOG2
102 #define ZIO_CHECKSUM_ON_VALUE ZIO_CHECKSUM_FLETCHER_4
103 #define ZIO_CHECKSUM_DEFAULT ZIO_CHECKSUM_ON
105 #define ZIO_CHECKSUM_MASK 0xffULL
106 #define ZIO_CHECKSUM_VERIFY (1U << 8)
108 #define ZIO_DEDUPCHECKSUM ZIO_CHECKSUM_SHA256
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
117 * The number of "legacy" compression functions which can be set on individual
120 #define ZIO_COMPRESS_LEGACY_FUNCTIONS ZIO_COMPRESS_LZ4
123 * The meaning of "compress = on" selected by the compression features enabled
126 #define ZIO_COMPRESS_LEGACY_ON_VALUE ZIO_COMPRESS_LZJB
127 #define ZIO_COMPRESS_LZ4_ON_VALUE ZIO_COMPRESS_LZ4
129 #define ZIO_COMPRESS_DEFAULT ZIO_COMPRESS_ON
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_ZLE || \
144 (compress) == ZIO_COMPRESS_ZSTD || \
145 (compress) == ZIO_COMPRESS_ON || \
146 (compress) == ZIO_COMPRESS_OFF)
149 #define ZIO_COMPRESS_ALGO(x) (x & SPA_COMPRESSMASK)
150 #define ZIO_COMPRESS_LEVEL(x) ((x & ~SPA_COMPRESSMASK) >> SPA_COMPRESSBITS)
151 #define ZIO_COMPRESS_RAW(type, level) (type | ((level) << SPA_COMPRESSBITS))
153 #define ZIO_COMPLEVEL_ZSTD(level) \
154 ZIO_COMPRESS_RAW(ZIO_COMPRESS_ZSTD, level)
156 #define ZIO_FAILURE_MODE_WAIT 0
157 #define ZIO_FAILURE_MODE_CONTINUE 1
158 #define ZIO_FAILURE_MODE_PANIC 2
160 typedef enum zio_suspend_reason {
161 ZIO_SUSPEND_NONE = 0,
164 } zio_suspend_reason_t;
168 * Flags inherited by gang, ddt, and vdev children,
169 * and that must be equal for two zios to aggregate
171 ZIO_FLAG_DONT_AGGREGATE = 1U << 0,
172 ZIO_FLAG_IO_REPAIR = 1U << 1,
173 ZIO_FLAG_SELF_HEAL = 1U << 2,
174 ZIO_FLAG_RESILVER = 1U << 3,
175 ZIO_FLAG_SCRUB = 1U << 4,
176 ZIO_FLAG_SCAN_THREAD = 1U << 5,
177 ZIO_FLAG_PHYSICAL = 1U << 6,
179 #define ZIO_FLAG_AGG_INHERIT (ZIO_FLAG_CANFAIL - 1)
182 * Flags inherited by ddt, gang, and vdev children.
184 ZIO_FLAG_CANFAIL = 1U << 7, /* must be first for INHERIT */
185 ZIO_FLAG_SPECULATIVE = 1U << 8,
186 ZIO_FLAG_CONFIG_WRITER = 1U << 9,
187 ZIO_FLAG_DONT_RETRY = 1U << 10,
188 ZIO_FLAG_DONT_CACHE = 1U << 11,
189 ZIO_FLAG_NODATA = 1U << 12,
190 ZIO_FLAG_INDUCE_DAMAGE = 1U << 13,
191 ZIO_FLAG_IO_ALLOCATING = 1U << 14,
193 #define ZIO_FLAG_DDT_INHERIT (ZIO_FLAG_IO_RETRY - 1)
194 #define ZIO_FLAG_GANG_INHERIT (ZIO_FLAG_IO_RETRY - 1)
197 * Flags inherited by vdev children.
199 ZIO_FLAG_IO_RETRY = 1U << 15, /* must be first for INHERIT */
200 ZIO_FLAG_PROBE = 1U << 16,
201 ZIO_FLAG_TRYHARD = 1U << 17,
202 ZIO_FLAG_OPTIONAL = 1U << 18,
204 #define ZIO_FLAG_VDEV_INHERIT (ZIO_FLAG_DONT_QUEUE - 1)
207 * Flags not inherited by any children.
209 ZIO_FLAG_DONT_QUEUE = 1U << 19, /* must be first for INHERIT */
210 ZIO_FLAG_DONT_PROPAGATE = 1U << 20,
211 ZIO_FLAG_IO_BYPASS = 1U << 21,
212 ZIO_FLAG_IO_REWRITE = 1U << 22,
213 ZIO_FLAG_RAW_COMPRESS = 1U << 23,
214 ZIO_FLAG_RAW_ENCRYPT = 1U << 24,
215 ZIO_FLAG_GANG_CHILD = 1U << 25,
216 ZIO_FLAG_DDT_CHILD = 1U << 26,
217 ZIO_FLAG_GODFATHER = 1U << 27,
218 ZIO_FLAG_NOPWRITE = 1U << 28,
219 ZIO_FLAG_REEXECUTED = 1U << 29,
220 ZIO_FLAG_DELEGATED = 1U << 30,
221 ZIO_FLAG_FASTWRITE = 1U << 31,
224 #define ZIO_FLAG_MUSTSUCCEED 0
225 #define ZIO_FLAG_RAW (ZIO_FLAG_RAW_COMPRESS | ZIO_FLAG_RAW_ENCRYPT)
227 #define ZIO_DDT_CHILD_FLAGS(zio) \
228 (((zio)->io_flags & ZIO_FLAG_DDT_INHERIT) | \
229 ZIO_FLAG_DDT_CHILD | ZIO_FLAG_CANFAIL)
231 #define ZIO_GANG_CHILD_FLAGS(zio) \
232 (((zio)->io_flags & ZIO_FLAG_GANG_INHERIT) | \
233 ZIO_FLAG_GANG_CHILD | ZIO_FLAG_CANFAIL)
235 #define ZIO_VDEV_CHILD_FLAGS(zio) \
236 (((zio)->io_flags & ZIO_FLAG_VDEV_INHERIT) | \
237 ZIO_FLAG_DONT_PROPAGATE | ZIO_FLAG_CANFAIL)
239 #define ZIO_CHILD_BIT(x) (1U << (x))
240 #define ZIO_CHILD_BIT_IS_SET(val, x) ((val) & (1U << (x)))
250 #define ZIO_CHILD_VDEV_BIT ZIO_CHILD_BIT(ZIO_CHILD_VDEV)
251 #define ZIO_CHILD_GANG_BIT ZIO_CHILD_BIT(ZIO_CHILD_GANG)
252 #define ZIO_CHILD_DDT_BIT ZIO_CHILD_BIT(ZIO_CHILD_DDT)
253 #define ZIO_CHILD_LOGICAL_BIT ZIO_CHILD_BIT(ZIO_CHILD_LOGICAL)
254 #define ZIO_CHILD_ALL_BITS \
255 (ZIO_CHILD_VDEV_BIT | ZIO_CHILD_GANG_BIT | \
256 ZIO_CHILD_DDT_BIT | ZIO_CHILD_LOGICAL_BIT)
264 typedef void zio_done_func_t(zio_t *zio);
266 extern int zio_exclude_metadata;
267 extern int zio_dva_throttle_enabled;
268 extern const char *const zio_type_name[ZIO_TYPES];
271 * A bookmark is a four-tuple <objset, object, level, blkid> that uniquely
272 * identifies any block in the pool. By convention, the meta-objset (MOS)
273 * is objset 0, and the meta-dnode is object 0. This covers all blocks
274 * except root blocks and ZIL blocks, which are defined as follows:
276 * Root blocks (objset_phys_t) are object 0, level -1: <objset, 0, -1, 0>.
277 * ZIL blocks are bookmarked <objset, 0, -2, blkid == ZIL sequence number>.
278 * dmu_sync()ed ZIL data blocks are bookmarked <objset, object, -2, blkid>.
279 * dnode visit bookmarks are <objset, object id of dnode, -3, 0>.
281 * Note: this structure is called a bookmark because its original purpose
282 * was to remember where to resume a pool-wide traverse.
284 * Note: this structure is passed between userland and the kernel, and is
285 * stored on disk (by virtue of being incorporated into other on-disk
286 * structures, e.g. dsl_scan_phys_t).
288 * If the head_errlog feature is enabled a different on-disk format for error
289 * logs is used. This introduces the use of an error bookmark, a four-tuple
290 * <object, level, blkid, birth> that uniquely identifies any error block
291 * in the pool. The birth transaction group is used to track whether the block
292 * has been overwritten by newer data or added to a snapshot since its marking
295 struct zbookmark_phys {
302 typedef struct zbookmark_err_phys {
307 } zbookmark_err_phys_t;
309 #define SET_BOOKMARK(zb, objset, object, level, blkid) \
311 (zb)->zb_objset = objset; \
312 (zb)->zb_object = object; \
313 (zb)->zb_level = level; \
314 (zb)->zb_blkid = blkid; \
317 #define ZB_DESTROYED_OBJSET (-1ULL)
319 #define ZB_ROOT_OBJECT (0ULL)
320 #define ZB_ROOT_LEVEL (-1LL)
321 #define ZB_ROOT_BLKID (0ULL)
323 #define ZB_ZIL_OBJECT (0ULL)
324 #define ZB_ZIL_LEVEL (-2LL)
326 #define ZB_DNODE_LEVEL (-3LL)
327 #define ZB_DNODE_BLKID (0ULL)
329 #define ZB_IS_ZERO(zb) \
330 ((zb)->zb_objset == 0 && (zb)->zb_object == 0 && \
331 (zb)->zb_level == 0 && (zb)->zb_blkid == 0)
332 #define ZB_IS_ROOT(zb) \
333 ((zb)->zb_object == ZB_ROOT_OBJECT && \
334 (zb)->zb_level == ZB_ROOT_LEVEL && \
335 (zb)->zb_blkid == ZB_ROOT_BLKID)
337 typedef struct zio_prop {
338 enum zio_checksum zp_checksum;
339 enum zio_compress zp_compress;
340 uint8_t zp_complevel;
341 dmu_object_type_t zp_type;
345 boolean_t zp_dedup_verify;
346 boolean_t zp_nopwrite;
347 boolean_t zp_encrypt;
348 boolean_t zp_byteorder;
349 uint8_t zp_salt[ZIO_DATA_SALT_LEN];
350 uint8_t zp_iv[ZIO_DATA_IV_LEN];
351 uint8_t zp_mac[ZIO_DATA_MAC_LEN];
352 uint32_t zp_zpl_smallblk;
355 typedef struct zio_cksum_report zio_cksum_report_t;
357 typedef void zio_cksum_finish_f(zio_cksum_report_t *rep,
358 const abd_t *good_data);
359 typedef void zio_cksum_free_f(void *cbdata, size_t size);
361 struct zio_bad_cksum; /* defined in zio_checksum.h */
365 struct zio_cksum_report {
366 struct zio_cksum_report *zcr_next;
367 nvlist_t *zcr_ereport;
368 nvlist_t *zcr_detector;
370 size_t zcr_cbinfo; /* passed to zcr_free() */
374 zio_cksum_finish_f *zcr_finish;
375 zio_cksum_free_f *zcr_free;
377 /* internal use only */
378 struct zio_bad_cksum *zcr_ckinfo; /* information from failure */
381 typedef struct zio_vsd_ops {
382 zio_done_func_t *vsd_free;
385 typedef struct zio_gang_node {
386 zio_gbh_phys_t *gn_gbh;
387 struct zio_gang_node *gn_child[SPA_GBH_NBLKPTRS];
390 typedef zio_t *zio_gang_issue_func_t(zio_t *zio, blkptr_t *bp,
391 zio_gang_node_t *gn, struct abd *data, uint64_t offset);
393 typedef void zio_transform_func_t(zio_t *zio, struct abd *data, uint64_t size);
395 typedef struct zio_transform {
396 struct abd *zt_orig_abd;
397 uint64_t zt_orig_size;
399 zio_transform_func_t *zt_transform;
400 struct zio_transform *zt_next;
403 typedef zio_t *zio_pipe_stage_t(zio_t *zio);
406 * The io_reexecute flags are distinct from io_flags because the child must
407 * be able to propagate them to the parent. The normal io_flags are local
408 * to the zio, not protected by any lock, and not modifiable by children;
409 * the reexecute flags are protected by io_lock, modifiable by children,
410 * and always propagated -- even when ZIO_FLAG_DONT_PROPAGATE is set.
412 #define ZIO_REEXECUTE_NOW 0x01
413 #define ZIO_REEXECUTE_SUSPEND 0x02
416 * The io_trim flags are used to specify the type of TRIM to perform. They
417 * only apply to ZIO_TYPE_TRIM zios are distinct from io_flags.
420 ZIO_TRIM_SECURE = 1U << 0,
423 typedef struct zio_alloc_list {
428 typedef struct zio_link {
431 list_node_t zl_parent_node;
432 list_node_t zl_child_node;
436 /* Core information about this I/O */
437 zbookmark_phys_t io_bookmark;
440 enum zio_child io_child_type;
441 enum trim_flag io_trim_flags;
443 zio_priority_t io_priority;
444 uint8_t io_reexecute;
445 uint8_t io_state[ZIO_WAIT_TYPES];
449 blkptr_t *io_bp_override;
451 list_t io_parent_list;
452 list_t io_child_list;
454 zio_transform_t *io_transform_stack;
457 zio_done_func_t *io_ready;
458 zio_done_func_t *io_children_ready;
459 zio_done_func_t *io_physdone;
460 zio_done_func_t *io_done;
462 int64_t io_prev_space_delta; /* DMU private */
464 /* io_lsize != io_orig_size iff this is a raw write */
467 /* Data represented by this I/O */
469 struct abd *io_orig_abd;
471 uint64_t io_orig_size;
473 /* Stuff for the vdev stack */
476 const zio_vsd_ops_t *io_vsd_ops;
477 metaslab_class_t *io_metaslab_class; /* dva throttle class */
480 hrtime_t io_timestamp; /* submitted at */
481 hrtime_t io_queued_timestamp;
482 hrtime_t io_target_timestamp;
483 hrtime_t io_delta; /* vdev queue service delta */
484 hrtime_t io_delay; /* Device access time (disk or */
486 avl_node_t io_queue_node;
487 avl_node_t io_offset_node;
488 avl_node_t io_alloc_node;
489 zio_alloc_list_t io_alloc_list;
491 /* Internal pipeline state */
492 enum zio_flag io_flags;
493 enum zio_stage io_stage;
494 enum zio_stage io_pipeline;
495 enum zio_flag io_orig_flags;
496 enum zio_stage io_orig_stage;
497 enum zio_stage io_orig_pipeline;
498 enum zio_stage io_pipeline_trace;
500 int io_child_error[ZIO_CHILD_TYPES];
501 uint64_t io_children[ZIO_CHILD_TYPES][ZIO_WAIT_TYPES];
502 uint64_t io_child_count;
503 uint64_t io_phys_children;
504 uint64_t io_parent_count;
506 zio_t *io_gang_leader;
507 zio_gang_node_t *io_gang_tree;
516 zio_cksum_report_t *io_cksum_report;
519 /* Taskq dispatching state */
520 taskq_ent_t io_tqent;
523 enum blk_verify_flag {
529 extern int zio_bookmark_compare(const void *, const void *);
531 extern zio_t *zio_null(zio_t *pio, spa_t *spa, vdev_t *vd,
532 zio_done_func_t *done, void *priv, enum zio_flag flags);
534 extern zio_t *zio_root(spa_t *spa,
535 zio_done_func_t *done, void *priv, enum zio_flag flags);
537 extern zio_t *zio_read(zio_t *pio, spa_t *spa, const blkptr_t *bp,
538 struct abd *data, uint64_t lsize, zio_done_func_t *done, void *priv,
539 zio_priority_t priority, enum zio_flag flags, const zbookmark_phys_t *zb);
541 extern zio_t *zio_write(zio_t *pio, spa_t *spa, uint64_t txg, blkptr_t *bp,
542 struct abd *data, uint64_t size, uint64_t psize, const zio_prop_t *zp,
543 zio_done_func_t *ready, zio_done_func_t *children_ready,
544 zio_done_func_t *physdone, zio_done_func_t *done,
545 void *priv, zio_priority_t priority, enum zio_flag flags,
546 const zbookmark_phys_t *zb);
548 extern zio_t *zio_rewrite(zio_t *pio, spa_t *spa, uint64_t txg, blkptr_t *bp,
549 struct abd *data, uint64_t size, zio_done_func_t *done, void *priv,
550 zio_priority_t priority, enum zio_flag flags, zbookmark_phys_t *zb);
552 extern void zio_write_override(zio_t *zio, blkptr_t *bp, int copies,
555 extern void zio_free(spa_t *spa, uint64_t txg, const blkptr_t *bp);
557 extern zio_t *zio_claim(zio_t *pio, spa_t *spa, uint64_t txg,
559 zio_done_func_t *done, void *priv, enum zio_flag flags);
561 extern zio_t *zio_ioctl(zio_t *pio, spa_t *spa, vdev_t *vd, int cmd,
562 zio_done_func_t *done, void *priv, enum zio_flag flags);
564 extern zio_t *zio_trim(zio_t *pio, vdev_t *vd, uint64_t offset, uint64_t size,
565 zio_done_func_t *done, void *priv, zio_priority_t priority,
566 enum zio_flag flags, enum trim_flag trim_flags);
568 extern zio_t *zio_read_phys(zio_t *pio, vdev_t *vd, uint64_t offset,
569 uint64_t size, struct abd *data, int checksum,
570 zio_done_func_t *done, void *priv, zio_priority_t priority,
571 enum zio_flag flags, boolean_t labels);
573 extern zio_t *zio_write_phys(zio_t *pio, vdev_t *vd, uint64_t offset,
574 uint64_t size, struct abd *data, int checksum,
575 zio_done_func_t *done, void *priv, zio_priority_t priority,
576 enum zio_flag flags, boolean_t labels);
578 extern zio_t *zio_free_sync(zio_t *pio, spa_t *spa, uint64_t txg,
579 const blkptr_t *bp, enum zio_flag flags);
581 extern int zio_alloc_zil(spa_t *spa, objset_t *os, uint64_t txg,
582 blkptr_t *new_bp, uint64_t size, boolean_t *slog);
583 extern void zio_flush(zio_t *zio, vdev_t *vd);
584 extern void zio_shrink(zio_t *zio, uint64_t size);
586 extern int zio_wait(zio_t *zio);
587 extern void zio_nowait(zio_t *zio);
588 extern void zio_execute(void *zio);
589 extern void zio_interrupt(void *zio);
590 extern void zio_delay_init(zio_t *zio);
591 extern void zio_delay_interrupt(zio_t *zio);
592 extern void zio_deadman(zio_t *zio, char *tag);
594 extern zio_t *zio_walk_parents(zio_t *cio, zio_link_t **);
595 extern zio_t *zio_walk_children(zio_t *pio, zio_link_t **);
596 extern zio_t *zio_unique_parent(zio_t *cio);
597 extern void zio_add_child(zio_t *pio, zio_t *cio);
599 extern void *zio_buf_alloc(size_t size);
600 extern void zio_buf_free(void *buf, size_t size);
601 extern void *zio_data_buf_alloc(size_t size);
602 extern void zio_data_buf_free(void *buf, size_t size);
604 extern void zio_push_transform(zio_t *zio, struct abd *abd, uint64_t size,
605 uint64_t bufsize, zio_transform_func_t *transform);
606 extern void zio_pop_transforms(zio_t *zio);
608 extern void zio_resubmit_stage_async(void *);
610 extern zio_t *zio_vdev_child_io(zio_t *zio, blkptr_t *bp, vdev_t *vd,
611 uint64_t offset, struct abd *data, uint64_t size, int type,
612 zio_priority_t priority, enum zio_flag flags,
613 zio_done_func_t *done, void *priv);
615 extern zio_t *zio_vdev_delegated_io(vdev_t *vd, uint64_t offset,
616 struct abd *data, uint64_t size, zio_type_t type, zio_priority_t priority,
617 enum zio_flag flags, zio_done_func_t *done, void *priv);
619 extern void zio_vdev_io_bypass(zio_t *zio);
620 extern void zio_vdev_io_reissue(zio_t *zio);
621 extern void zio_vdev_io_redone(zio_t *zio);
623 extern void zio_change_priority(zio_t *pio, zio_priority_t priority);
625 extern void zio_checksum_verified(zio_t *zio);
626 extern int zio_worst_error(int e1, int e2);
628 extern enum zio_checksum zio_checksum_select(enum zio_checksum child,
629 enum zio_checksum parent);
630 extern enum zio_checksum zio_checksum_dedup_select(spa_t *spa,
631 enum zio_checksum child, enum zio_checksum parent);
632 extern enum zio_compress zio_compress_select(spa_t *spa,
633 enum zio_compress child, enum zio_compress parent);
634 extern uint8_t zio_complevel_select(spa_t *spa, enum zio_compress compress,
635 uint8_t child, uint8_t parent);
637 extern void zio_suspend(spa_t *spa, zio_t *zio, zio_suspend_reason_t);
638 extern int zio_resume(spa_t *spa);
639 extern void zio_resume_wait(spa_t *spa);
641 extern boolean_t zfs_blkptr_verify(spa_t *spa, const blkptr_t *bp,
642 boolean_t config_held, enum blk_verify_flag blk_verify);
645 * Initial setup and teardown.
647 extern void zio_init(void);
648 extern void zio_fini(void);
653 struct zinject_record;
654 extern uint32_t zio_injection_enabled;
655 extern int zio_inject_fault(char *name, int flags, int *id,
656 struct zinject_record *record);
657 extern int zio_inject_list_next(int *id, char *name, size_t buflen,
658 struct zinject_record *record);
659 extern int zio_clear_fault(int id);
660 extern void zio_handle_panic_injection(spa_t *spa, char *tag, uint64_t type);
661 extern int zio_handle_decrypt_injection(spa_t *spa, const zbookmark_phys_t *zb,
662 uint64_t type, int error);
663 extern int zio_handle_fault_injection(zio_t *zio, int error);
664 extern int zio_handle_device_injection(vdev_t *vd, zio_t *zio, int error);
665 extern int zio_handle_device_injections(vdev_t *vd, zio_t *zio, int err1,
667 extern int zio_handle_label_injection(zio_t *zio, int error);
668 extern void zio_handle_ignored_writes(zio_t *zio);
669 extern hrtime_t zio_handle_io_delay(zio_t *zio);
672 * Checksum ereport functions
674 extern int zfs_ereport_start_checksum(spa_t *spa, vdev_t *vd,
675 const zbookmark_phys_t *zb, struct zio *zio, uint64_t offset,
676 uint64_t length, struct zio_bad_cksum *info);
677 extern void zfs_ereport_finish_checksum(zio_cksum_report_t *report,
678 const abd_t *good_data, const abd_t *bad_data, boolean_t drop_if_identical);
680 extern void zfs_ereport_free_checksum(zio_cksum_report_t *report);
682 /* If we have the good data in hand, this function can be used */
683 extern int zfs_ereport_post_checksum(spa_t *spa, vdev_t *vd,
684 const zbookmark_phys_t *zb, struct zio *zio, uint64_t offset,
685 uint64_t length, const abd_t *good_data, const abd_t *bad_data,
686 struct zio_bad_cksum *info);
688 void zio_vsd_default_cksum_report(zio_t *zio, zio_cksum_report_t *zcr);
689 extern void zfs_ereport_snapshot_post(const char *subclass, spa_t *spa,
692 /* Called from spa_sync(), but primarily an injection handler */
693 extern void spa_handle_ignored_writes(spa_t *spa);
695 /* zbookmark_phys functions */
696 boolean_t zbookmark_subtree_completed(const struct dnode_phys *dnp,
697 const zbookmark_phys_t *subtree_root, const zbookmark_phys_t *last_block);
698 int zbookmark_compare(uint16_t dbss1, uint8_t ibs1, uint16_t dbss2,
699 uint8_t ibs2, const zbookmark_phys_t *zb1, const zbookmark_phys_t *zb2);