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, 2018 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>
34 #include <sys/zio_priority.h>
35 #include <sys/zfs_context.h>
39 #include <sys/fs/zfs.h>
40 #include <sys/zio_impl.h>
49 #define ZEC_MAGIC 0x210da7ab10c7a11ULL
51 typedef struct zio_eck
{
52 uint64_t zec_magic
; /* for validation, endianness */
53 zio_cksum_t zec_cksum
; /* 256-bit checksum */
57 * Gang block headers are self-checksumming and contain an array
60 #define SPA_GANGBLOCKSIZE SPA_MINBLOCKSIZE
61 #define SPA_GBH_NBLKPTRS ((SPA_GANGBLOCKSIZE - \
62 sizeof (zio_eck_t)) / sizeof (blkptr_t))
63 #define SPA_GBH_FILLER ((SPA_GANGBLOCKSIZE - \
64 sizeof (zio_eck_t) - \
65 (SPA_GBH_NBLKPTRS * sizeof (blkptr_t))) /\
68 typedef struct zio_gbh
{
69 blkptr_t zg_blkptr
[SPA_GBH_NBLKPTRS
];
70 uint64_t zg_filler
[SPA_GBH_FILLER
];
75 ZIO_CHECKSUM_INHERIT
= 0,
79 ZIO_CHECKSUM_GANG_HEADER
,
81 ZIO_CHECKSUM_FLETCHER_2
,
82 ZIO_CHECKSUM_FLETCHER_4
,
85 ZIO_CHECKSUM_NOPARITY
,
89 ZIO_CHECKSUM_FUNCTIONS
93 * The number of "legacy" compression functions which can be set on individual
96 #define ZIO_CHECKSUM_LEGACY_FUNCTIONS ZIO_CHECKSUM_ZILOG2
98 #define ZIO_CHECKSUM_ON_VALUE ZIO_CHECKSUM_FLETCHER_4
99 #define ZIO_CHECKSUM_DEFAULT ZIO_CHECKSUM_ON
101 #define ZIO_CHECKSUM_MASK 0xffULL
102 #define ZIO_CHECKSUM_VERIFY (1 << 8)
104 #define ZIO_DEDUPCHECKSUM ZIO_CHECKSUM_SHA256
105 #define ZIO_DEDUPDITTO_MIN 100
107 /* supported encryption algorithms */
109 ZIO_CRYPT_INHERIT
= 0,
112 ZIO_CRYPT_AES_128_CCM
,
113 ZIO_CRYPT_AES_192_CCM
,
114 ZIO_CRYPT_AES_256_CCM
,
115 ZIO_CRYPT_AES_128_GCM
,
116 ZIO_CRYPT_AES_192_GCM
,
117 ZIO_CRYPT_AES_256_GCM
,
121 #define ZIO_CRYPT_ON_VALUE ZIO_CRYPT_AES_256_CCM
122 #define ZIO_CRYPT_DEFAULT ZIO_CRYPT_OFF
124 /* macros defining encryption lengths */
125 #define ZIO_OBJSET_MAC_LEN 32
126 #define ZIO_DATA_IV_LEN 12
127 #define ZIO_DATA_SALT_LEN 8
128 #define ZIO_DATA_MAC_LEN 16
131 * The number of "legacy" compression functions which can be set on individual
134 #define ZIO_COMPRESS_LEGACY_FUNCTIONS ZIO_COMPRESS_LZ4
137 * The meaning of "compress = on" selected by the compression features enabled
140 #define ZIO_COMPRESS_LEGACY_ON_VALUE ZIO_COMPRESS_LZJB
141 #define ZIO_COMPRESS_LZ4_ON_VALUE ZIO_COMPRESS_LZ4
143 #define ZIO_COMPRESS_DEFAULT ZIO_COMPRESS_OFF
145 #define BOOTFS_COMPRESS_VALID(compress) \
146 ((compress) == ZIO_COMPRESS_LZJB || \
147 (compress) == ZIO_COMPRESS_LZ4 || \
148 (compress) == ZIO_COMPRESS_GZIP_1 || \
149 (compress) == ZIO_COMPRESS_GZIP_2 || \
150 (compress) == ZIO_COMPRESS_GZIP_3 || \
151 (compress) == ZIO_COMPRESS_GZIP_4 || \
152 (compress) == ZIO_COMPRESS_GZIP_5 || \
153 (compress) == ZIO_COMPRESS_GZIP_6 || \
154 (compress) == ZIO_COMPRESS_GZIP_7 || \
155 (compress) == ZIO_COMPRESS_GZIP_8 || \
156 (compress) == ZIO_COMPRESS_GZIP_9 || \
157 (compress) == ZIO_COMPRESS_ZLE || \
158 (compress) == ZIO_COMPRESS_ON || \
159 (compress) == ZIO_COMPRESS_OFF)
162 * Default Linux timeout for a sd device.
164 #define ZIO_DELAY_MAX (30 * MILLISEC)
166 #define ZIO_FAILURE_MODE_WAIT 0
167 #define ZIO_FAILURE_MODE_CONTINUE 1
168 #define ZIO_FAILURE_MODE_PANIC 2
170 typedef enum zio_suspend_reason
{
171 ZIO_SUSPEND_NONE
= 0,
174 } zio_suspend_reason_t
;
178 * Flags inherited by gang, ddt, and vdev children,
179 * and that must be equal for two zios to aggregate
181 ZIO_FLAG_DONT_AGGREGATE
= 1 << 0,
182 ZIO_FLAG_IO_REPAIR
= 1 << 1,
183 ZIO_FLAG_SELF_HEAL
= 1 << 2,
184 ZIO_FLAG_RESILVER
= 1 << 3,
185 ZIO_FLAG_SCRUB
= 1 << 4,
186 ZIO_FLAG_SCAN_THREAD
= 1 << 5,
187 ZIO_FLAG_PHYSICAL
= 1 << 6,
189 #define ZIO_FLAG_AGG_INHERIT (ZIO_FLAG_CANFAIL - 1)
192 * Flags inherited by ddt, gang, and vdev children.
194 ZIO_FLAG_CANFAIL
= 1 << 7, /* must be first for INHERIT */
195 ZIO_FLAG_SPECULATIVE
= 1 << 8,
196 ZIO_FLAG_CONFIG_WRITER
= 1 << 9,
197 ZIO_FLAG_DONT_RETRY
= 1 << 10,
198 ZIO_FLAG_DONT_CACHE
= 1 << 11,
199 ZIO_FLAG_NODATA
= 1 << 12,
200 ZIO_FLAG_INDUCE_DAMAGE
= 1 << 13,
201 ZIO_FLAG_IO_ALLOCATING
= 1 << 14,
203 #define ZIO_FLAG_DDT_INHERIT (ZIO_FLAG_IO_RETRY - 1)
204 #define ZIO_FLAG_GANG_INHERIT (ZIO_FLAG_IO_RETRY - 1)
207 * Flags inherited by vdev children.
209 ZIO_FLAG_IO_RETRY
= 1 << 15, /* must be first for INHERIT */
210 ZIO_FLAG_PROBE
= 1 << 16,
211 ZIO_FLAG_TRYHARD
= 1 << 17,
212 ZIO_FLAG_OPTIONAL
= 1 << 18,
214 #define ZIO_FLAG_VDEV_INHERIT (ZIO_FLAG_DONT_QUEUE - 1)
217 * Flags not inherited by any children.
219 ZIO_FLAG_DONT_QUEUE
= 1 << 19, /* must be first for INHERIT */
220 ZIO_FLAG_DONT_PROPAGATE
= 1 << 20,
221 ZIO_FLAG_IO_BYPASS
= 1 << 21,
222 ZIO_FLAG_IO_REWRITE
= 1 << 22,
223 ZIO_FLAG_RAW_COMPRESS
= 1 << 23,
224 ZIO_FLAG_RAW_ENCRYPT
= 1 << 24,
225 ZIO_FLAG_GANG_CHILD
= 1 << 25,
226 ZIO_FLAG_DDT_CHILD
= 1 << 26,
227 ZIO_FLAG_GODFATHER
= 1 << 27,
228 ZIO_FLAG_NOPWRITE
= 1 << 28,
229 ZIO_FLAG_REEXECUTED
= 1 << 29,
230 ZIO_FLAG_DELEGATED
= 1 << 30,
231 ZIO_FLAG_FASTWRITE
= 1 << 31,
234 #define ZIO_FLAG_MUSTSUCCEED 0
235 #define ZIO_FLAG_RAW (ZIO_FLAG_RAW_COMPRESS | ZIO_FLAG_RAW_ENCRYPT)
237 #define ZIO_DDT_CHILD_FLAGS(zio) \
238 (((zio)->io_flags & ZIO_FLAG_DDT_INHERIT) | \
239 ZIO_FLAG_DDT_CHILD | ZIO_FLAG_CANFAIL)
241 #define ZIO_GANG_CHILD_FLAGS(zio) \
242 (((zio)->io_flags & ZIO_FLAG_GANG_INHERIT) | \
243 ZIO_FLAG_GANG_CHILD | ZIO_FLAG_CANFAIL)
245 #define ZIO_VDEV_CHILD_FLAGS(zio) \
246 (((zio)->io_flags & ZIO_FLAG_VDEV_INHERIT) | \
247 ZIO_FLAG_DONT_PROPAGATE | ZIO_FLAG_CANFAIL)
249 #define ZIO_CHILD_BIT(x) (1 << (x))
250 #define ZIO_CHILD_BIT_IS_SET(val, x) ((val) & (1 << (x)))
260 #define ZIO_CHILD_VDEV_BIT ZIO_CHILD_BIT(ZIO_CHILD_VDEV)
261 #define ZIO_CHILD_GANG_BIT ZIO_CHILD_BIT(ZIO_CHILD_GANG)
262 #define ZIO_CHILD_DDT_BIT ZIO_CHILD_BIT(ZIO_CHILD_DDT)
263 #define ZIO_CHILD_LOGICAL_BIT ZIO_CHILD_BIT(ZIO_CHILD_LOGICAL)
264 #define ZIO_CHILD_ALL_BITS \
265 (ZIO_CHILD_VDEV_BIT | ZIO_CHILD_GANG_BIT | \
266 ZIO_CHILD_DDT_BIT | ZIO_CHILD_LOGICAL_BIT)
275 * We'll take the unused errnos, 'EBADE' and 'EBADR' (from the Convergent
276 * graveyard) to indicate checksum errors and fragmentation.
281 /* Similar for ENOACTIVE */
282 #define ENOTACTIVE ENOANO
284 typedef void zio_done_func_t(zio_t
*zio
);
286 extern int zio_dva_throttle_enabled
;
287 extern const char *zio_type_name
[ZIO_TYPES
];
290 * A bookmark is a four-tuple <objset, object, level, blkid> that uniquely
291 * identifies any block in the pool. By convention, the meta-objset (MOS)
292 * is objset 0, and the meta-dnode is object 0. This covers all blocks
293 * except root blocks and ZIL blocks, which are defined as follows:
295 * Root blocks (objset_phys_t) are object 0, level -1: <objset, 0, -1, 0>.
296 * ZIL blocks are bookmarked <objset, 0, -2, blkid == ZIL sequence number>.
297 * dmu_sync()ed ZIL data blocks are bookmarked <objset, object, -2, blkid>.
298 * dnode visit bookmarks are <objset, object id of dnode, -3, 0>.
300 * Note: this structure is called a bookmark because its original purpose
301 * was to remember where to resume a pool-wide traverse.
303 * Note: this structure is passed between userland and the kernel, and is
304 * stored on disk (by virtue of being incorporated into other on-disk
305 * structures, e.g. dsl_scan_phys_t).
307 struct zbookmark_phys
{
314 #define SET_BOOKMARK(zb, objset, object, level, blkid) \
316 (zb)->zb_objset = objset; \
317 (zb)->zb_object = object; \
318 (zb)->zb_level = level; \
319 (zb)->zb_blkid = blkid; \
322 #define ZB_DESTROYED_OBJSET (-1ULL)
324 #define ZB_ROOT_OBJECT (0ULL)
325 #define ZB_ROOT_LEVEL (-1LL)
326 #define ZB_ROOT_BLKID (0ULL)
328 #define ZB_ZIL_OBJECT (0ULL)
329 #define ZB_ZIL_LEVEL (-2LL)
331 #define ZB_DNODE_LEVEL (-3LL)
332 #define ZB_DNODE_BLKID (0ULL)
334 #define ZB_IS_ZERO(zb) \
335 ((zb)->zb_objset == 0 && (zb)->zb_object == 0 && \
336 (zb)->zb_level == 0 && (zb)->zb_blkid == 0)
337 #define ZB_IS_ROOT(zb) \
338 ((zb)->zb_object == ZB_ROOT_OBJECT && \
339 (zb)->zb_level == ZB_ROOT_LEVEL && \
340 (zb)->zb_blkid == ZB_ROOT_BLKID)
342 typedef struct zio_prop
{
343 enum zio_checksum zp_checksum
;
344 enum zio_compress zp_compress
;
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
];
358 typedef struct zio_cksum_report zio_cksum_report_t
;
360 typedef void zio_cksum_finish_f(zio_cksum_report_t
*rep
,
361 const abd_t
*good_data
);
362 typedef void zio_cksum_free_f(void *cbdata
, size_t size
);
364 struct zio_bad_cksum
; /* defined in zio_checksum.h */
368 struct zio_cksum_report
{
369 struct zio_cksum_report
*zcr_next
;
370 nvlist_t
*zcr_ereport
;
371 nvlist_t
*zcr_detector
;
373 size_t zcr_cbinfo
; /* passed to zcr_free() */
376 zio_cksum_finish_f
*zcr_finish
;
377 zio_cksum_free_f
*zcr_free
;
379 /* internal use only */
380 struct zio_bad_cksum
*zcr_ckinfo
; /* information from failure */
383 typedef void zio_vsd_cksum_report_f(zio_t
*zio
, zio_cksum_report_t
*zcr
,
386 zio_vsd_cksum_report_f zio_vsd_default_cksum_report
;
388 typedef struct zio_vsd_ops
{
389 zio_done_func_t
*vsd_free
;
390 zio_vsd_cksum_report_f
*vsd_cksum_report
;
393 typedef struct zio_gang_node
{
394 zio_gbh_phys_t
*gn_gbh
;
395 struct zio_gang_node
*gn_child
[SPA_GBH_NBLKPTRS
];
398 typedef zio_t
*zio_gang_issue_func_t(zio_t
*zio
, blkptr_t
*bp
,
399 zio_gang_node_t
*gn
, struct abd
*data
, uint64_t offset
);
401 typedef void zio_transform_func_t(zio_t
*zio
, struct abd
*data
, uint64_t size
);
403 typedef struct zio_transform
{
404 struct abd
*zt_orig_abd
;
405 uint64_t zt_orig_size
;
407 zio_transform_func_t
*zt_transform
;
408 struct zio_transform
*zt_next
;
411 typedef zio_t
*zio_pipe_stage_t(zio_t
*zio
);
414 * The io_reexecute flags are distinct from io_flags because the child must
415 * be able to propagate them to the parent. The normal io_flags are local
416 * to the zio, not protected by any lock, and not modifiable by children;
417 * the reexecute flags are protected by io_lock, modifiable by children,
418 * and always propagated -- even when ZIO_FLAG_DONT_PROPAGATE is set.
420 #define ZIO_REEXECUTE_NOW 0x01
421 #define ZIO_REEXECUTE_SUSPEND 0x02
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
;
442 zio_priority_t io_priority
;
443 uint8_t io_reexecute
;
444 uint8_t io_state
[ZIO_WAIT_TYPES
];
448 blkptr_t
*io_bp_override
;
450 list_t io_parent_list
;
451 list_t io_child_list
;
453 zio_transform_t
*io_transform_stack
;
456 zio_done_func_t
*io_ready
;
457 zio_done_func_t
*io_children_ready
;
458 zio_done_func_t
*io_physdone
;
459 zio_done_func_t
*io_done
;
461 int64_t io_prev_space_delta
; /* DMU private */
463 /* io_lsize != io_orig_size iff this is a raw write */
466 /* Data represented by this I/O */
468 struct abd
*io_orig_abd
;
470 uint64_t io_orig_size
;
472 /* Stuff for the vdev stack */
475 const zio_vsd_ops_t
*io_vsd_ops
;
478 hrtime_t io_timestamp
; /* submitted at */
479 hrtime_t io_queued_timestamp
;
480 hrtime_t io_target_timestamp
;
481 hrtime_t io_delta
; /* vdev queue service delta */
482 hrtime_t io_delay
; /* Device access time (disk or */
484 avl_node_t io_queue_node
;
485 avl_node_t io_offset_node
;
486 avl_node_t io_alloc_node
;
487 zio_alloc_list_t io_alloc_list
;
489 /* Internal pipeline state */
490 enum zio_flag io_flags
;
491 enum zio_stage io_stage
;
492 enum zio_stage io_pipeline
;
493 enum zio_flag io_orig_flags
;
494 enum zio_stage io_orig_stage
;
495 enum zio_stage io_orig_pipeline
;
496 enum zio_stage io_pipeline_trace
;
498 int io_child_error
[ZIO_CHILD_TYPES
];
499 uint64_t io_children
[ZIO_CHILD_TYPES
][ZIO_WAIT_TYPES
];
500 uint64_t io_child_count
;
501 uint64_t io_phys_children
;
502 uint64_t io_parent_count
;
504 zio_t
*io_gang_leader
;
505 zio_gang_node_t
*io_gang_tree
;
513 zio_cksum_report_t
*io_cksum_report
;
516 /* Taskq dispatching state */
517 taskq_ent_t io_tqent
;
520 extern int zio_bookmark_compare(const void *, const void *);
522 extern zio_t
*zio_null(zio_t
*pio
, spa_t
*spa
, vdev_t
*vd
,
523 zio_done_func_t
*done
, void *private, enum zio_flag flags
);
525 extern zio_t
*zio_root(spa_t
*spa
,
526 zio_done_func_t
*done
, void *private, enum zio_flag flags
);
528 extern zio_t
*zio_read(zio_t
*pio
, spa_t
*spa
, const blkptr_t
*bp
,
529 struct abd
*data
, uint64_t lsize
, zio_done_func_t
*done
, void *private,
530 zio_priority_t priority
, enum zio_flag flags
, const zbookmark_phys_t
*zb
);
532 extern zio_t
*zio_write(zio_t
*pio
, spa_t
*spa
, uint64_t txg
, blkptr_t
*bp
,
533 struct abd
*data
, uint64_t size
, uint64_t psize
, const zio_prop_t
*zp
,
534 zio_done_func_t
*ready
, zio_done_func_t
*children_ready
,
535 zio_done_func_t
*physdone
, zio_done_func_t
*done
,
536 void *private, zio_priority_t priority
, enum zio_flag flags
,
537 const zbookmark_phys_t
*zb
);
539 extern zio_t
*zio_rewrite(zio_t
*pio
, spa_t
*spa
, uint64_t txg
, blkptr_t
*bp
,
540 struct abd
*data
, uint64_t size
, zio_done_func_t
*done
, void *private,
541 zio_priority_t priority
, enum zio_flag flags
, zbookmark_phys_t
*zb
);
543 extern void zio_write_override(zio_t
*zio
, blkptr_t
*bp
, int copies
,
546 extern void zio_free(spa_t
*spa
, uint64_t txg
, const blkptr_t
*bp
);
548 extern zio_t
*zio_claim(zio_t
*pio
, spa_t
*spa
, uint64_t txg
,
550 zio_done_func_t
*done
, void *private, enum zio_flag flags
);
552 extern zio_t
*zio_ioctl(zio_t
*pio
, spa_t
*spa
, vdev_t
*vd
, int cmd
,
553 zio_done_func_t
*done
, void *private, enum zio_flag flags
);
555 extern zio_t
*zio_read_phys(zio_t
*pio
, vdev_t
*vd
, uint64_t offset
,
556 uint64_t size
, struct abd
*data
, int checksum
,
557 zio_done_func_t
*done
, void *private, zio_priority_t priority
,
558 enum zio_flag flags
, boolean_t labels
);
560 extern zio_t
*zio_write_phys(zio_t
*pio
, vdev_t
*vd
, uint64_t offset
,
561 uint64_t size
, struct abd
*data
, int checksum
,
562 zio_done_func_t
*done
, void *private, zio_priority_t priority
,
563 enum zio_flag flags
, boolean_t labels
);
565 extern zio_t
*zio_free_sync(zio_t
*pio
, spa_t
*spa
, uint64_t txg
,
566 const blkptr_t
*bp
, enum zio_flag flags
);
568 extern int zio_alloc_zil(spa_t
*spa
, objset_t
*os
, uint64_t txg
,
569 blkptr_t
*new_bp
, uint64_t size
, boolean_t
*slog
);
570 extern void zio_flush(zio_t
*zio
, vdev_t
*vd
);
571 extern void zio_shrink(zio_t
*zio
, uint64_t size
);
573 extern int zio_wait(zio_t
*zio
);
574 extern void zio_nowait(zio_t
*zio
);
575 extern void zio_execute(zio_t
*zio
);
576 extern void zio_interrupt(zio_t
*zio
);
577 extern void zio_delay_init(zio_t
*zio
);
578 extern void zio_delay_interrupt(zio_t
*zio
);
579 extern void zio_deadman(zio_t
*zio
, char *tag
);
581 extern zio_t
*zio_walk_parents(zio_t
*cio
, zio_link_t
**);
582 extern zio_t
*zio_walk_children(zio_t
*pio
, zio_link_t
**);
583 extern zio_t
*zio_unique_parent(zio_t
*cio
);
584 extern void zio_add_child(zio_t
*pio
, zio_t
*cio
);
586 extern void *zio_buf_alloc(size_t size
);
587 extern void zio_buf_free(void *buf
, size_t size
);
588 extern void *zio_data_buf_alloc(size_t size
);
589 extern void zio_data_buf_free(void *buf
, size_t size
);
591 extern void zio_push_transform(zio_t
*zio
, struct abd
*abd
, uint64_t size
,
592 uint64_t bufsize
, zio_transform_func_t
*transform
);
593 extern void zio_pop_transforms(zio_t
*zio
);
595 extern void zio_resubmit_stage_async(void *);
597 extern zio_t
*zio_vdev_child_io(zio_t
*zio
, blkptr_t
*bp
, vdev_t
*vd
,
598 uint64_t offset
, struct abd
*data
, uint64_t size
, int type
,
599 zio_priority_t priority
, enum zio_flag flags
,
600 zio_done_func_t
*done
, void *private);
602 extern zio_t
*zio_vdev_delegated_io(vdev_t
*vd
, uint64_t offset
,
603 struct abd
*data
, uint64_t size
, zio_type_t type
, zio_priority_t priority
,
604 enum zio_flag flags
, zio_done_func_t
*done
, void *private);
606 extern void zio_vdev_io_bypass(zio_t
*zio
);
607 extern void zio_vdev_io_reissue(zio_t
*zio
);
608 extern void zio_vdev_io_redone(zio_t
*zio
);
610 extern void zio_change_priority(zio_t
*pio
, zio_priority_t priority
);
612 extern void zio_checksum_verified(zio_t
*zio
);
613 extern int zio_worst_error(int e1
, int e2
);
615 extern enum zio_checksum
zio_checksum_select(enum zio_checksum child
,
616 enum zio_checksum parent
);
617 extern enum zio_checksum
zio_checksum_dedup_select(spa_t
*spa
,
618 enum zio_checksum child
, enum zio_checksum parent
);
619 extern enum zio_compress
zio_compress_select(spa_t
*spa
,
620 enum zio_compress child
, enum zio_compress parent
);
622 extern void zio_suspend(spa_t
*spa
, zio_t
*zio
, zio_suspend_reason_t
);
623 extern int zio_resume(spa_t
*spa
);
624 extern void zio_resume_wait(spa_t
*spa
);
627 * Initial setup and teardown.
629 extern void zio_init(void);
630 extern void zio_fini(void);
635 struct zinject_record
;
636 extern uint32_t zio_injection_enabled
;
637 extern int zio_inject_fault(char *name
, int flags
, int *id
,
638 struct zinject_record
*record
);
639 extern int zio_inject_list_next(int *id
, char *name
, size_t buflen
,
640 struct zinject_record
*record
);
641 extern int zio_clear_fault(int id
);
642 extern void zio_handle_panic_injection(spa_t
*spa
, char *tag
, uint64_t type
);
643 extern int zio_handle_decrypt_injection(spa_t
*spa
, const zbookmark_phys_t
*zb
,
644 uint64_t type
, int error
);
645 extern int zio_handle_fault_injection(zio_t
*zio
, int error
);
646 extern int zio_handle_device_injection(vdev_t
*vd
, zio_t
*zio
, int error
);
647 extern int zio_handle_device_injections(vdev_t
*vd
, zio_t
*zio
, int err1
,
649 extern int zio_handle_label_injection(zio_t
*zio
, int error
);
650 extern void zio_handle_ignored_writes(zio_t
*zio
);
651 extern hrtime_t
zio_handle_io_delay(zio_t
*zio
);
654 * Checksum ereport functions
656 extern void zfs_ereport_start_checksum(spa_t
*spa
, vdev_t
*vd
,
657 const zbookmark_phys_t
*zb
, struct zio
*zio
, uint64_t offset
,
658 uint64_t length
, void *arg
, struct zio_bad_cksum
*info
);
659 extern void zfs_ereport_finish_checksum(zio_cksum_report_t
*report
,
660 const abd_t
*good_data
, const abd_t
*bad_data
, boolean_t drop_if_identical
);
662 extern void zfs_ereport_free_checksum(zio_cksum_report_t
*report
);
664 /* If we have the good data in hand, this function can be used */
665 extern void zfs_ereport_post_checksum(spa_t
*spa
, vdev_t
*vd
,
666 const zbookmark_phys_t
*zb
, struct zio
*zio
, uint64_t offset
,
667 uint64_t length
, const abd_t
*good_data
, const abd_t
*bad_data
,
668 struct zio_bad_cksum
*info
);
670 /* Called from spa_sync(), but primarily an injection handler */
671 extern void spa_handle_ignored_writes(spa_t
*spa
);
673 /* zbookmark_phys functions */
674 boolean_t
zbookmark_subtree_completed(const struct dnode_phys
*dnp
,
675 const zbookmark_phys_t
*subtree_root
, const zbookmark_phys_t
*last_block
);
676 int zbookmark_compare(uint16_t dbss1
, uint8_t ibs1
, uint16_t dbss2
,
677 uint8_t ibs2
, const zbookmark_phys_t
*zb1
, const zbookmark_phys_t
*zb2
);