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,
91 #if !defined(__FreeBSD__)
94 ZIO_CHECKSUM_FUNCTIONS
98 * The number of "legacy" compression functions which can be set on individual
101 #define ZIO_CHECKSUM_LEGACY_FUNCTIONS ZIO_CHECKSUM_ZILOG2
103 #define ZIO_CHECKSUM_ON_VALUE ZIO_CHECKSUM_FLETCHER_4
104 #define ZIO_CHECKSUM_DEFAULT ZIO_CHECKSUM_ON
106 #define ZIO_CHECKSUM_MASK 0xffULL
107 #define ZIO_CHECKSUM_VERIFY (1 << 8)
109 #define ZIO_DEDUPCHECKSUM ZIO_CHECKSUM_SHA256
111 /* supported encryption algorithms */
113 ZIO_CRYPT_INHERIT = 0,
116 ZIO_CRYPT_AES_128_CCM,
117 ZIO_CRYPT_AES_192_CCM,
118 ZIO_CRYPT_AES_256_CCM,
119 ZIO_CRYPT_AES_128_GCM,
120 ZIO_CRYPT_AES_192_GCM,
121 ZIO_CRYPT_AES_256_GCM,
125 #define ZIO_CRYPT_ON_VALUE ZIO_CRYPT_AES_256_GCM
126 #define ZIO_CRYPT_DEFAULT ZIO_CRYPT_OFF
128 /* macros defining encryption lengths */
129 #define ZIO_OBJSET_MAC_LEN 32
130 #define ZIO_DATA_IV_LEN 12
131 #define ZIO_DATA_SALT_LEN 8
132 #define ZIO_DATA_MAC_LEN 16
135 * The number of "legacy" compression functions which can be set on individual
138 #define ZIO_COMPRESS_LEGACY_FUNCTIONS ZIO_COMPRESS_LZ4
141 * The meaning of "compress = on" selected by the compression features enabled
144 #define ZIO_COMPRESS_LEGACY_ON_VALUE ZIO_COMPRESS_LZJB
145 #define ZIO_COMPRESS_LZ4_ON_VALUE ZIO_COMPRESS_LZ4
147 #define ZIO_COMPRESS_DEFAULT ZIO_COMPRESS_OFF
149 #define BOOTFS_COMPRESS_VALID(compress) \
150 ((compress) == ZIO_COMPRESS_LZJB || \
151 (compress) == ZIO_COMPRESS_LZ4 || \
152 (compress) == ZIO_COMPRESS_GZIP_1 || \
153 (compress) == ZIO_COMPRESS_GZIP_2 || \
154 (compress) == ZIO_COMPRESS_GZIP_3 || \
155 (compress) == ZIO_COMPRESS_GZIP_4 || \
156 (compress) == ZIO_COMPRESS_GZIP_5 || \
157 (compress) == ZIO_COMPRESS_GZIP_6 || \
158 (compress) == ZIO_COMPRESS_GZIP_7 || \
159 (compress) == ZIO_COMPRESS_GZIP_8 || \
160 (compress) == ZIO_COMPRESS_GZIP_9 || \
161 (compress) == ZIO_COMPRESS_ZLE || \
162 (compress) == ZIO_COMPRESS_ZSTD || \
163 (compress) == ZIO_COMPRESS_ON || \
164 (compress) == ZIO_COMPRESS_OFF)
167 #define ZIO_COMPRESS_ALGO(x) (x & SPA_COMPRESSMASK)
168 #define ZIO_COMPRESS_LEVEL(x) ((x & ~SPA_COMPRESSMASK) >> SPA_COMPRESSBITS)
169 #define ZIO_COMPRESS_RAW(type, level) (type | ((level) << SPA_COMPRESSBITS))
171 #define ZIO_COMPLEVEL_ZSTD(level) \
172 ZIO_COMPRESS_RAW(ZIO_COMPRESS_ZSTD, level)
174 #define ZIO_FAILURE_MODE_WAIT 0
175 #define ZIO_FAILURE_MODE_CONTINUE 1
176 #define ZIO_FAILURE_MODE_PANIC 2
178 typedef enum zio_suspend_reason {
179 ZIO_SUSPEND_NONE = 0,
182 } zio_suspend_reason_t;
186 * Flags inherited by gang, ddt, and vdev children,
187 * and that must be equal for two zios to aggregate
189 ZIO_FLAG_DONT_AGGREGATE = 1 << 0,
190 ZIO_FLAG_IO_REPAIR = 1 << 1,
191 ZIO_FLAG_SELF_HEAL = 1 << 2,
192 ZIO_FLAG_RESILVER = 1 << 3,
193 ZIO_FLAG_SCRUB = 1 << 4,
194 ZIO_FLAG_SCAN_THREAD = 1 << 5,
195 ZIO_FLAG_PHYSICAL = 1 << 6,
197 #define ZIO_FLAG_AGG_INHERIT (ZIO_FLAG_CANFAIL - 1)
200 * Flags inherited by ddt, gang, and vdev children.
202 ZIO_FLAG_CANFAIL = 1 << 7, /* must be first for INHERIT */
203 ZIO_FLAG_SPECULATIVE = 1 << 8,
204 ZIO_FLAG_CONFIG_WRITER = 1 << 9,
205 ZIO_FLAG_DONT_RETRY = 1 << 10,
206 ZIO_FLAG_DONT_CACHE = 1 << 11,
207 ZIO_FLAG_NODATA = 1 << 12,
208 ZIO_FLAG_INDUCE_DAMAGE = 1 << 13,
209 ZIO_FLAG_IO_ALLOCATING = 1 << 14,
211 #define ZIO_FLAG_DDT_INHERIT (ZIO_FLAG_IO_RETRY - 1)
212 #define ZIO_FLAG_GANG_INHERIT (ZIO_FLAG_IO_RETRY - 1)
215 * Flags inherited by vdev children.
217 ZIO_FLAG_IO_RETRY = 1 << 15, /* must be first for INHERIT */
218 ZIO_FLAG_PROBE = 1 << 16,
219 ZIO_FLAG_TRYHARD = 1 << 17,
220 ZIO_FLAG_OPTIONAL = 1 << 18,
222 #define ZIO_FLAG_VDEV_INHERIT (ZIO_FLAG_DONT_QUEUE - 1)
225 * Flags not inherited by any children.
227 ZIO_FLAG_DONT_QUEUE = 1 << 19, /* must be first for INHERIT */
228 ZIO_FLAG_DONT_PROPAGATE = 1 << 20,
229 ZIO_FLAG_IO_BYPASS = 1 << 21,
230 ZIO_FLAG_IO_REWRITE = 1 << 22,
231 ZIO_FLAG_RAW_COMPRESS = 1 << 23,
232 ZIO_FLAG_RAW_ENCRYPT = 1 << 24,
233 ZIO_FLAG_GANG_CHILD = 1 << 25,
234 ZIO_FLAG_DDT_CHILD = 1 << 26,
235 ZIO_FLAG_GODFATHER = 1 << 27,
236 ZIO_FLAG_NOPWRITE = 1 << 28,
237 ZIO_FLAG_REEXECUTED = 1 << 29,
238 ZIO_FLAG_DELEGATED = 1 << 30,
239 ZIO_FLAG_FASTWRITE = 1 << 31,
242 #define ZIO_FLAG_MUSTSUCCEED 0
243 #define ZIO_FLAG_RAW (ZIO_FLAG_RAW_COMPRESS | ZIO_FLAG_RAW_ENCRYPT)
245 #define ZIO_DDT_CHILD_FLAGS(zio) \
246 (((zio)->io_flags & ZIO_FLAG_DDT_INHERIT) | \
247 ZIO_FLAG_DDT_CHILD | ZIO_FLAG_CANFAIL)
249 #define ZIO_GANG_CHILD_FLAGS(zio) \
250 (((zio)->io_flags & ZIO_FLAG_GANG_INHERIT) | \
251 ZIO_FLAG_GANG_CHILD | ZIO_FLAG_CANFAIL)
253 #define ZIO_VDEV_CHILD_FLAGS(zio) \
254 (((zio)->io_flags & ZIO_FLAG_VDEV_INHERIT) | \
255 ZIO_FLAG_DONT_PROPAGATE | ZIO_FLAG_CANFAIL)
257 #define ZIO_CHILD_BIT(x) (1 << (x))
258 #define ZIO_CHILD_BIT_IS_SET(val, x) ((val) & (1 << (x)))
268 #define ZIO_CHILD_VDEV_BIT ZIO_CHILD_BIT(ZIO_CHILD_VDEV)
269 #define ZIO_CHILD_GANG_BIT ZIO_CHILD_BIT(ZIO_CHILD_GANG)
270 #define ZIO_CHILD_DDT_BIT ZIO_CHILD_BIT(ZIO_CHILD_DDT)
271 #define ZIO_CHILD_LOGICAL_BIT ZIO_CHILD_BIT(ZIO_CHILD_LOGICAL)
272 #define ZIO_CHILD_ALL_BITS \
273 (ZIO_CHILD_VDEV_BIT | ZIO_CHILD_GANG_BIT | \
274 ZIO_CHILD_DDT_BIT | ZIO_CHILD_LOGICAL_BIT)
282 typedef void zio_done_func_t(zio_t *zio);
284 extern int zio_exclude_metadata;
285 extern int zio_dva_throttle_enabled;
286 extern const char *zio_type_name[ZIO_TYPES];
289 * A bookmark is a four-tuple <objset, object, level, blkid> that uniquely
290 * identifies any block in the pool. By convention, the meta-objset (MOS)
291 * is objset 0, and the meta-dnode is object 0. This covers all blocks
292 * except root blocks and ZIL blocks, which are defined as follows:
294 * Root blocks (objset_phys_t) are object 0, level -1: <objset, 0, -1, 0>.
295 * ZIL blocks are bookmarked <objset, 0, -2, blkid == ZIL sequence number>.
296 * dmu_sync()ed ZIL data blocks are bookmarked <objset, object, -2, blkid>.
297 * dnode visit bookmarks are <objset, object id of dnode, -3, 0>.
299 * Note: this structure is called a bookmark because its original purpose
300 * was to remember where to resume a pool-wide traverse.
302 * Note: this structure is passed between userland and the kernel, and is
303 * stored on disk (by virtue of being incorporated into other on-disk
304 * structures, e.g. dsl_scan_phys_t).
306 struct zbookmark_phys {
313 #define SET_BOOKMARK(zb, objset, object, level, blkid) \
315 (zb)->zb_objset = objset; \
316 (zb)->zb_object = object; \
317 (zb)->zb_level = level; \
318 (zb)->zb_blkid = blkid; \
321 #define ZB_DESTROYED_OBJSET (-1ULL)
323 #define ZB_ROOT_OBJECT (0ULL)
324 #define ZB_ROOT_LEVEL (-1LL)
325 #define ZB_ROOT_BLKID (0ULL)
327 #define ZB_ZIL_OBJECT (0ULL)
328 #define ZB_ZIL_LEVEL (-2LL)
330 #define ZB_DNODE_LEVEL (-3LL)
331 #define ZB_DNODE_BLKID (0ULL)
333 #define ZB_IS_ZERO(zb) \
334 ((zb)->zb_objset == 0 && (zb)->zb_object == 0 && \
335 (zb)->zb_level == 0 && (zb)->zb_blkid == 0)
336 #define ZB_IS_ROOT(zb) \
337 ((zb)->zb_object == ZB_ROOT_OBJECT && \
338 (zb)->zb_level == ZB_ROOT_LEVEL && \
339 (zb)->zb_blkid == ZB_ROOT_BLKID)
341 typedef struct zio_prop {
342 enum zio_checksum zp_checksum;
343 enum zio_compress zp_compress;
344 uint8_t zp_complevel;
345 dmu_object_type_t zp_type;
349 boolean_t zp_dedup_verify;
350 boolean_t zp_nopwrite;
351 boolean_t zp_encrypt;
352 boolean_t zp_byteorder;
353 uint8_t zp_salt[ZIO_DATA_SALT_LEN];
354 uint8_t zp_iv[ZIO_DATA_IV_LEN];
355 uint8_t zp_mac[ZIO_DATA_MAC_LEN];
356 uint32_t zp_zpl_smallblk;
359 typedef struct zio_cksum_report zio_cksum_report_t;
361 typedef void zio_cksum_finish_f(zio_cksum_report_t *rep,
362 const abd_t *good_data);
363 typedef void zio_cksum_free_f(void *cbdata, size_t size);
365 struct zio_bad_cksum; /* defined in zio_checksum.h */
369 struct zio_cksum_report {
370 struct zio_cksum_report *zcr_next;
371 nvlist_t *zcr_ereport;
372 nvlist_t *zcr_detector;
374 size_t zcr_cbinfo; /* passed to zcr_free() */
377 zio_cksum_finish_f *zcr_finish;
378 zio_cksum_free_f *zcr_free;
380 /* internal use only */
381 struct zio_bad_cksum *zcr_ckinfo; /* information from failure */
384 typedef void zio_vsd_cksum_report_f(zio_t *zio, zio_cksum_report_t *zcr,
387 zio_vsd_cksum_report_f zio_vsd_default_cksum_report;
389 typedef struct zio_vsd_ops {
390 zio_done_func_t *vsd_free;
391 zio_vsd_cksum_report_f *vsd_cksum_report;
394 typedef struct zio_gang_node {
395 zio_gbh_phys_t *gn_gbh;
396 struct zio_gang_node *gn_child[SPA_GBH_NBLKPTRS];
399 typedef zio_t *zio_gang_issue_func_t(zio_t *zio, blkptr_t *bp,
400 zio_gang_node_t *gn, struct abd *data, uint64_t offset);
402 typedef void zio_transform_func_t(zio_t *zio, struct abd *data, uint64_t size);
404 typedef struct zio_transform {
405 struct abd *zt_orig_abd;
406 uint64_t zt_orig_size;
408 zio_transform_func_t *zt_transform;
409 struct zio_transform *zt_next;
412 typedef zio_t *zio_pipe_stage_t(zio_t *zio);
415 * The io_reexecute flags are distinct from io_flags because the child must
416 * be able to propagate them to the parent. The normal io_flags are local
417 * to the zio, not protected by any lock, and not modifiable by children;
418 * the reexecute flags are protected by io_lock, modifiable by children,
419 * and always propagated -- even when ZIO_FLAG_DONT_PROPAGATE is set.
421 #define ZIO_REEXECUTE_NOW 0x01
422 #define ZIO_REEXECUTE_SUSPEND 0x02
425 * The io_trim flags are used to specify the type of TRIM to perform. They
426 * only apply to ZIO_TYPE_TRIM zios are distinct from io_flags.
429 ZIO_TRIM_SECURE = 1 << 0,
432 typedef struct zio_alloc_list {
437 typedef struct zio_link {
440 list_node_t zl_parent_node;
441 list_node_t zl_child_node;
445 /* Core information about this I/O */
446 zbookmark_phys_t io_bookmark;
449 enum zio_child io_child_type;
450 enum trim_flag io_trim_flags;
452 zio_priority_t io_priority;
453 uint8_t io_reexecute;
454 uint8_t io_state[ZIO_WAIT_TYPES];
458 blkptr_t *io_bp_override;
460 list_t io_parent_list;
461 list_t io_child_list;
463 zio_transform_t *io_transform_stack;
466 zio_done_func_t *io_ready;
467 zio_done_func_t *io_children_ready;
468 zio_done_func_t *io_physdone;
469 zio_done_func_t *io_done;
471 int64_t io_prev_space_delta; /* DMU private */
473 /* io_lsize != io_orig_size iff this is a raw write */
476 /* Data represented by this I/O */
478 struct abd *io_orig_abd;
480 uint64_t io_orig_size;
482 /* Stuff for the vdev stack */
485 const zio_vsd_ops_t *io_vsd_ops;
486 metaslab_class_t *io_metaslab_class; /* dva throttle class */
489 hrtime_t io_timestamp; /* submitted at */
490 hrtime_t io_queued_timestamp;
491 hrtime_t io_target_timestamp;
492 hrtime_t io_delta; /* vdev queue service delta */
493 hrtime_t io_delay; /* Device access time (disk or */
495 avl_node_t io_queue_node;
496 avl_node_t io_offset_node;
497 avl_node_t io_alloc_node;
498 zio_alloc_list_t io_alloc_list;
500 /* Internal pipeline state */
501 enum zio_flag io_flags;
502 enum zio_stage io_stage;
503 enum zio_stage io_pipeline;
504 enum zio_flag io_orig_flags;
505 enum zio_stage io_orig_stage;
506 enum zio_stage io_orig_pipeline;
507 enum zio_stage io_pipeline_trace;
509 int io_child_error[ZIO_CHILD_TYPES];
510 uint64_t io_children[ZIO_CHILD_TYPES][ZIO_WAIT_TYPES];
511 uint64_t io_child_count;
512 uint64_t io_phys_children;
513 uint64_t io_parent_count;
515 zio_t *io_gang_leader;
516 zio_gang_node_t *io_gang_tree;
525 zio_cksum_report_t *io_cksum_report;
528 /* Taskq dispatching state */
529 taskq_ent_t io_tqent;
532 enum blk_verify_flag {
538 extern int zio_bookmark_compare(const void *, const void *);
540 extern zio_t *zio_null(zio_t *pio, spa_t *spa, vdev_t *vd,
541 zio_done_func_t *done, void *priv, enum zio_flag flags);
543 extern zio_t *zio_root(spa_t *spa,
544 zio_done_func_t *done, void *priv, enum zio_flag flags);
546 extern zio_t *zio_read(zio_t *pio, spa_t *spa, const blkptr_t *bp,
547 struct abd *data, uint64_t lsize, zio_done_func_t *done, void *priv,
548 zio_priority_t priority, enum zio_flag flags, const zbookmark_phys_t *zb);
550 extern zio_t *zio_write(zio_t *pio, spa_t *spa, uint64_t txg, blkptr_t *bp,
551 struct abd *data, uint64_t size, uint64_t psize, const zio_prop_t *zp,
552 zio_done_func_t *ready, zio_done_func_t *children_ready,
553 zio_done_func_t *physdone, zio_done_func_t *done,
554 void *priv, zio_priority_t priority, enum zio_flag flags,
555 const zbookmark_phys_t *zb);
557 extern zio_t *zio_rewrite(zio_t *pio, spa_t *spa, uint64_t txg, blkptr_t *bp,
558 struct abd *data, uint64_t size, zio_done_func_t *done, void *priv,
559 zio_priority_t priority, enum zio_flag flags, zbookmark_phys_t *zb);
561 extern void zio_write_override(zio_t *zio, blkptr_t *bp, int copies,
564 extern void zio_free(spa_t *spa, uint64_t txg, const blkptr_t *bp);
566 extern zio_t *zio_claim(zio_t *pio, spa_t *spa, uint64_t txg,
568 zio_done_func_t *done, void *priv, enum zio_flag flags);
570 extern zio_t *zio_ioctl(zio_t *pio, spa_t *spa, vdev_t *vd, int cmd,
571 zio_done_func_t *done, void *priv, enum zio_flag flags);
573 extern zio_t *zio_trim(zio_t *pio, vdev_t *vd, uint64_t offset, uint64_t size,
574 zio_done_func_t *done, void *priv, zio_priority_t priority,
575 enum zio_flag flags, enum trim_flag trim_flags);
577 extern zio_t *zio_read_phys(zio_t *pio, vdev_t *vd, uint64_t offset,
578 uint64_t size, struct abd *data, int checksum,
579 zio_done_func_t *done, void *priv, zio_priority_t priority,
580 enum zio_flag flags, boolean_t labels);
582 extern zio_t *zio_write_phys(zio_t *pio, vdev_t *vd, uint64_t offset,
583 uint64_t size, struct abd *data, int checksum,
584 zio_done_func_t *done, void *priv, zio_priority_t priority,
585 enum zio_flag flags, boolean_t labels);
587 extern zio_t *zio_free_sync(zio_t *pio, spa_t *spa, uint64_t txg,
588 const blkptr_t *bp, enum zio_flag flags);
590 extern int zio_alloc_zil(spa_t *spa, objset_t *os, uint64_t txg,
591 blkptr_t *new_bp, uint64_t size, boolean_t *slog);
592 extern void zio_flush(zio_t *zio, vdev_t *vd);
593 extern void zio_shrink(zio_t *zio, uint64_t size);
595 extern int zio_wait(zio_t *zio);
596 extern void zio_nowait(zio_t *zio);
597 extern void zio_execute(zio_t *zio);
598 extern void zio_interrupt(zio_t *zio);
599 extern void zio_delay_init(zio_t *zio);
600 extern void zio_delay_interrupt(zio_t *zio);
601 extern void zio_deadman(zio_t *zio, char *tag);
603 extern zio_t *zio_walk_parents(zio_t *cio, zio_link_t **);
604 extern zio_t *zio_walk_children(zio_t *pio, zio_link_t **);
605 extern zio_t *zio_unique_parent(zio_t *cio);
606 extern void zio_add_child(zio_t *pio, zio_t *cio);
608 extern void *zio_buf_alloc(size_t size);
609 extern void zio_buf_free(void *buf, size_t size);
610 extern void *zio_data_buf_alloc(size_t size);
611 extern void zio_data_buf_free(void *buf, size_t size);
613 extern void zio_push_transform(zio_t *zio, struct abd *abd, uint64_t size,
614 uint64_t bufsize, zio_transform_func_t *transform);
615 extern void zio_pop_transforms(zio_t *zio);
617 extern void zio_resubmit_stage_async(void *);
619 extern zio_t *zio_vdev_child_io(zio_t *zio, blkptr_t *bp, vdev_t *vd,
620 uint64_t offset, struct abd *data, uint64_t size, int type,
621 zio_priority_t priority, enum zio_flag flags,
622 zio_done_func_t *done, void *priv);
624 extern zio_t *zio_vdev_delegated_io(vdev_t *vd, uint64_t offset,
625 struct abd *data, uint64_t size, zio_type_t type, zio_priority_t priority,
626 enum zio_flag flags, zio_done_func_t *done, void *priv);
628 extern void zio_vdev_io_bypass(zio_t *zio);
629 extern void zio_vdev_io_reissue(zio_t *zio);
630 extern void zio_vdev_io_redone(zio_t *zio);
632 extern void zio_change_priority(zio_t *pio, zio_priority_t priority);
634 extern void zio_checksum_verified(zio_t *zio);
635 extern int zio_worst_error(int e1, int e2);
637 extern enum zio_checksum zio_checksum_select(enum zio_checksum child,
638 enum zio_checksum parent);
639 extern enum zio_checksum zio_checksum_dedup_select(spa_t *spa,
640 enum zio_checksum child, enum zio_checksum parent);
641 extern enum zio_compress zio_compress_select(spa_t *spa,
642 enum zio_compress child, enum zio_compress parent);
643 extern uint8_t zio_complevel_select(spa_t *spa, enum zio_compress compress,
644 uint8_t child, uint8_t parent);
646 extern void zio_suspend(spa_t *spa, zio_t *zio, zio_suspend_reason_t);
647 extern int zio_resume(spa_t *spa);
648 extern void zio_resume_wait(spa_t *spa);
650 extern boolean_t zfs_blkptr_verify(spa_t *spa, const blkptr_t *bp,
651 boolean_t config_held, enum blk_verify_flag blk_verify);
654 * Initial setup and teardown.
656 extern void zio_init(void);
657 extern void zio_fini(void);
662 struct zinject_record;
663 extern uint32_t zio_injection_enabled;
664 extern int zio_inject_fault(char *name, int flags, int *id,
665 struct zinject_record *record);
666 extern int zio_inject_list_next(int *id, char *name, size_t buflen,
667 struct zinject_record *record);
668 extern int zio_clear_fault(int id);
669 extern void zio_handle_panic_injection(spa_t *spa, char *tag, uint64_t type);
670 extern int zio_handle_decrypt_injection(spa_t *spa, const zbookmark_phys_t *zb,
671 uint64_t type, int error);
672 extern int zio_handle_fault_injection(zio_t *zio, int error);
673 extern int zio_handle_device_injection(vdev_t *vd, zio_t *zio, int error);
674 extern int zio_handle_device_injections(vdev_t *vd, zio_t *zio, int err1,
676 extern int zio_handle_label_injection(zio_t *zio, int error);
677 extern void zio_handle_ignored_writes(zio_t *zio);
678 extern hrtime_t zio_handle_io_delay(zio_t *zio);
681 * Checksum ereport functions
683 extern int zfs_ereport_start_checksum(spa_t *spa, vdev_t *vd,
684 const zbookmark_phys_t *zb, struct zio *zio, uint64_t offset,
685 uint64_t length, void *arg, struct zio_bad_cksum *info);
686 extern void zfs_ereport_finish_checksum(zio_cksum_report_t *report,
687 const abd_t *good_data, const abd_t *bad_data, boolean_t drop_if_identical);
689 extern void zfs_ereport_free_checksum(zio_cksum_report_t *report);
691 /* If we have the good data in hand, this function can be used */
692 extern int zfs_ereport_post_checksum(spa_t *spa, vdev_t *vd,
693 const zbookmark_phys_t *zb, struct zio *zio, uint64_t offset,
694 uint64_t length, const abd_t *good_data, const abd_t *bad_data,
695 struct zio_bad_cksum *info);
697 /* Called from spa_sync(), but primarily an injection handler */
698 extern void spa_handle_ignored_writes(spa_t *spa);
700 /* zbookmark_phys functions */
701 boolean_t zbookmark_subtree_completed(const struct dnode_phys *dnp,
702 const zbookmark_phys_t *subtree_root, const zbookmark_phys_t *last_block);
703 int zbookmark_compare(uint16_t dbss1, uint8_t ibs1, uint16_t dbss2,
704 uint8_t ibs2, const zbookmark_phys_t *zb1, const zbookmark_phys_t *zb2);