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 https://opensource.org/licenses/CDDL-1.0.
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, 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
32 */
33
34 #ifndef _ZIO_H
35 #define _ZIO_H
36
37 #include <sys/zio_priority.h>
38 #include <sys/zfs_context.h>
39 #include <sys/spa.h>
40 #include <sys/txg.h>
41 #include <sys/avl.h>
42 #include <sys/fs/zfs.h>
43 #include <sys/zio_impl.h>
44
45 #ifdef __cplusplus
46 extern "C" {
47 #endif
48
49 /*
50 * Embedded checksum
51 */
52 #define ZEC_MAGIC 0x210da7ab10c7a11ULL
53
54 typedef struct zio_eck {
55 uint64_t zec_magic; /* for validation, endianness */
56 zio_cksum_t zec_cksum; /* 256-bit checksum */
57 } zio_eck_t;
58
59 /*
60 * Gang block headers are self-checksumming and contain an array
61 * of block pointers.
62 */
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))) /\
69 sizeof (uint64_t))
70
71 typedef struct zio_gbh {
72 blkptr_t zg_blkptr[SPA_GBH_NBLKPTRS];
73 uint64_t zg_filler[SPA_GBH_FILLER];
74 zio_eck_t zg_tail;
75 } zio_gbh_phys_t;
76
77 enum zio_checksum {
78 ZIO_CHECKSUM_INHERIT = 0,
79 ZIO_CHECKSUM_ON,
80 ZIO_CHECKSUM_OFF,
81 ZIO_CHECKSUM_LABEL,
82 ZIO_CHECKSUM_GANG_HEADER,
83 ZIO_CHECKSUM_ZILOG,
84 ZIO_CHECKSUM_FLETCHER_2,
85 ZIO_CHECKSUM_FLETCHER_4,
86 ZIO_CHECKSUM_SHA256,
87 ZIO_CHECKSUM_ZILOG2,
88 ZIO_CHECKSUM_NOPARITY,
89 ZIO_CHECKSUM_SHA512,
90 ZIO_CHECKSUM_SKEIN,
91 ZIO_CHECKSUM_EDONR,
92 ZIO_CHECKSUM_BLAKE3,
93 ZIO_CHECKSUM_FUNCTIONS
94 };
95
96 /*
97 * The number of "legacy" compression functions which can be set on individual
98 * objects.
99 */
100 #define ZIO_CHECKSUM_LEGACY_FUNCTIONS ZIO_CHECKSUM_ZILOG2
101
102 #define ZIO_CHECKSUM_ON_VALUE ZIO_CHECKSUM_FLETCHER_4
103 #define ZIO_CHECKSUM_DEFAULT ZIO_CHECKSUM_ON
104
105 #define ZIO_CHECKSUM_MASK 0xffULL
106 #define ZIO_CHECKSUM_VERIFY (1U << 8)
107
108 #define ZIO_DEDUPCHECKSUM ZIO_CHECKSUM_SHA256
109
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
115
116 /*
117 * The number of "legacy" compression functions which can be set on individual
118 * objects.
119 */
120 #define ZIO_COMPRESS_LEGACY_FUNCTIONS ZIO_COMPRESS_LZ4
121
122 /*
123 * The meaning of "compress = on" selected by the compression features enabled
124 * on a given pool.
125 */
126 #define ZIO_COMPRESS_LEGACY_ON_VALUE ZIO_COMPRESS_LZJB
127 #define ZIO_COMPRESS_LZ4_ON_VALUE ZIO_COMPRESS_LZ4
128
129 #define ZIO_COMPRESS_DEFAULT ZIO_COMPRESS_ON
130
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)
147
148
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))
152
153 #define ZIO_COMPLEVEL_ZSTD(level) \
154 ZIO_COMPRESS_RAW(ZIO_COMPRESS_ZSTD, level)
155
156 #define ZIO_FAILURE_MODE_WAIT 0
157 #define ZIO_FAILURE_MODE_CONTINUE 1
158 #define ZIO_FAILURE_MODE_PANIC 2
159
160 typedef enum zio_suspend_reason {
161 ZIO_SUSPEND_NONE = 0,
162 ZIO_SUSPEND_IOERR,
163 ZIO_SUSPEND_MMP,
164 } zio_suspend_reason_t;
165
166 /*
167 * This was originally an enum type. However, those are 32-bit and there is no
168 * way to make a 64-bit enum type. Since we ran out of bits for flags, we were
169 * forced to upgrade it to a uint64_t.
170 */
171 typedef uint64_t zio_flag_t;
172 /*
173 * Flags inherited by gang, ddt, and vdev children,
174 * and that must be equal for two zios to aggregate
175 */
176 #define ZIO_FLAG_DONT_AGGREGATE (1ULL << 0)
177 #define ZIO_FLAG_IO_REPAIR (1ULL << 1)
178 #define ZIO_FLAG_SELF_HEAL (1ULL << 2)
179 #define ZIO_FLAG_RESILVER (1ULL << 3)
180 #define ZIO_FLAG_SCRUB (1ULL << 4)
181 #define ZIO_FLAG_SCAN_THREAD (1ULL << 5)
182 #define ZIO_FLAG_PHYSICAL (1ULL << 6)
183
184 #define ZIO_FLAG_AGG_INHERIT (ZIO_FLAG_CANFAIL - 1)
185
186 /*
187 * Flags inherited by ddt, gang, and vdev children.
188 */
189 #define ZIO_FLAG_CANFAIL (1ULL << 7) /* must be first for INHERIT */
190 #define ZIO_FLAG_SPECULATIVE (1ULL << 8)
191 #define ZIO_FLAG_CONFIG_WRITER (1ULL << 9)
192 #define ZIO_FLAG_DONT_RETRY (1ULL << 10)
193 #define ZIO_FLAG_DONT_CACHE (1ULL << 11)
194 #define ZIO_FLAG_NODATA (1ULL << 12)
195 #define ZIO_FLAG_INDUCE_DAMAGE (1ULL << 13)
196 #define ZIO_FLAG_IO_ALLOCATING (1ULL << 14)
197
198 #define ZIO_FLAG_DDT_INHERIT (ZIO_FLAG_IO_RETRY - 1)
199 #define ZIO_FLAG_GANG_INHERIT (ZIO_FLAG_IO_RETRY - 1)
200
201 /*
202 * Flags inherited by vdev children.
203 */
204 #define ZIO_FLAG_IO_RETRY (1ULL << 15) /* must be first for INHERIT */
205 #define ZIO_FLAG_PROBE (1ULL << 16)
206 #define ZIO_FLAG_TRYHARD (1ULL << 17)
207 #define ZIO_FLAG_OPTIONAL (1ULL << 18)
208
209 #define ZIO_FLAG_VDEV_INHERIT (ZIO_FLAG_DONT_QUEUE - 1)
210
211 /*
212 * Flags not inherited by any children.
213 */
214 #define ZIO_FLAG_DONT_QUEUE (1ULL << 19) /* must be first for INHERIT */
215 #define ZIO_FLAG_DONT_PROPAGATE (1ULL << 20)
216 #define ZIO_FLAG_IO_BYPASS (1ULL << 21)
217 #define ZIO_FLAG_IO_REWRITE (1ULL << 22)
218 #define ZIO_FLAG_RAW_COMPRESS (1ULL << 23)
219 #define ZIO_FLAG_RAW_ENCRYPT (1ULL << 24)
220 #define ZIO_FLAG_GANG_CHILD (1ULL << 25)
221 #define ZIO_FLAG_DDT_CHILD (1ULL << 26)
222 #define ZIO_FLAG_GODFATHER (1ULL << 27)
223 #define ZIO_FLAG_NOPWRITE (1ULL << 28)
224 #define ZIO_FLAG_REEXECUTED (1ULL << 29)
225 #define ZIO_FLAG_DELEGATED (1ULL << 30)
226 #define ZIO_FLAG_FASTWRITE (1ULL << 31)
227
228 #define ZIO_FLAG_MUSTSUCCEED 0
229 #define ZIO_FLAG_RAW (ZIO_FLAG_RAW_COMPRESS | ZIO_FLAG_RAW_ENCRYPT)
230
231 #define ZIO_DDT_CHILD_FLAGS(zio) \
232 (((zio)->io_flags & ZIO_FLAG_DDT_INHERIT) | \
233 ZIO_FLAG_DDT_CHILD | ZIO_FLAG_CANFAIL)
234
235 #define ZIO_GANG_CHILD_FLAGS(zio) \
236 (((zio)->io_flags & ZIO_FLAG_GANG_INHERIT) | \
237 ZIO_FLAG_GANG_CHILD | ZIO_FLAG_CANFAIL)
238
239 #define ZIO_VDEV_CHILD_FLAGS(zio) \
240 (((zio)->io_flags & ZIO_FLAG_VDEV_INHERIT) | \
241 ZIO_FLAG_DONT_PROPAGATE | ZIO_FLAG_CANFAIL)
242
243 #define ZIO_CHILD_BIT(x) (1U << (x))
244 #define ZIO_CHILD_BIT_IS_SET(val, x) ((val) & (1U << (x)))
245
246 enum zio_child {
247 ZIO_CHILD_VDEV = 0,
248 ZIO_CHILD_GANG,
249 ZIO_CHILD_DDT,
250 ZIO_CHILD_LOGICAL,
251 ZIO_CHILD_TYPES
252 };
253
254 #define ZIO_CHILD_VDEV_BIT ZIO_CHILD_BIT(ZIO_CHILD_VDEV)
255 #define ZIO_CHILD_GANG_BIT ZIO_CHILD_BIT(ZIO_CHILD_GANG)
256 #define ZIO_CHILD_DDT_BIT ZIO_CHILD_BIT(ZIO_CHILD_DDT)
257 #define ZIO_CHILD_LOGICAL_BIT ZIO_CHILD_BIT(ZIO_CHILD_LOGICAL)
258 #define ZIO_CHILD_ALL_BITS \
259 (ZIO_CHILD_VDEV_BIT | ZIO_CHILD_GANG_BIT | \
260 ZIO_CHILD_DDT_BIT | ZIO_CHILD_LOGICAL_BIT)
261
262 enum zio_wait_type {
263 ZIO_WAIT_READY = 0,
264 ZIO_WAIT_DONE,
265 ZIO_WAIT_TYPES
266 };
267
268 typedef void zio_done_func_t(zio_t *zio);
269
270 extern int zio_exclude_metadata;
271 extern int zio_dva_throttle_enabled;
272 extern const char *const zio_type_name[ZIO_TYPES];
273
274 /*
275 * A bookmark is a four-tuple <objset, object, level, blkid> that uniquely
276 * identifies any block in the pool. By convention, the meta-objset (MOS)
277 * is objset 0, and the meta-dnode is object 0. This covers all blocks
278 * except root blocks and ZIL blocks, which are defined as follows:
279 *
280 * Root blocks (objset_phys_t) are object 0, level -1: <objset, 0, -1, 0>.
281 * ZIL blocks are bookmarked <objset, 0, -2, blkid == ZIL sequence number>.
282 * dmu_sync()ed ZIL data blocks are bookmarked <objset, object, -2, blkid>.
283 * dnode visit bookmarks are <objset, object id of dnode, -3, 0>.
284 *
285 * Note: this structure is called a bookmark because its original purpose
286 * was to remember where to resume a pool-wide traverse.
287 *
288 * Note: this structure is passed between userland and the kernel, and is
289 * stored on disk (by virtue of being incorporated into other on-disk
290 * structures, e.g. dsl_scan_phys_t).
291 *
292 * If the head_errlog feature is enabled a different on-disk format for error
293 * logs is used. This introduces the use of an error bookmark, a four-tuple
294 * <object, level, blkid, birth> that uniquely identifies any error block
295 * in the pool. The birth transaction group is used to track whether the block
296 * has been overwritten by newer data or added to a snapshot since its marking
297 * as an error.
298 */
299 struct zbookmark_phys {
300 uint64_t zb_objset;
301 uint64_t zb_object;
302 int64_t zb_level;
303 uint64_t zb_blkid;
304 };
305
306 typedef struct zbookmark_err_phys {
307 uint64_t zb_object;
308 int64_t zb_level;
309 uint64_t zb_blkid;
310 uint64_t zb_birth;
311 } zbookmark_err_phys_t;
312
313 #define SET_BOOKMARK(zb, objset, object, level, blkid) \
314 { \
315 (zb)->zb_objset = objset; \
316 (zb)->zb_object = object; \
317 (zb)->zb_level = level; \
318 (zb)->zb_blkid = blkid; \
319 }
320
321 #define ZB_DESTROYED_OBJSET (-1ULL)
322
323 #define ZB_ROOT_OBJECT (0ULL)
324 #define ZB_ROOT_LEVEL (-1LL)
325 #define ZB_ROOT_BLKID (0ULL)
326
327 #define ZB_ZIL_OBJECT (0ULL)
328 #define ZB_ZIL_LEVEL (-2LL)
329
330 #define ZB_DNODE_LEVEL (-3LL)
331 #define ZB_DNODE_BLKID (0ULL)
332
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)
340
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;
346 uint8_t zp_level;
347 uint8_t zp_copies;
348 boolean_t zp_dedup;
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;
357 } zio_prop_t;
358
359 typedef struct zio_cksum_report zio_cksum_report_t;
360
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);
364
365 struct zio_bad_cksum; /* defined in zio_checksum.h */
366 struct dnode_phys;
367 struct abd;
368
369 struct zio_cksum_report {
370 struct zio_cksum_report *zcr_next;
371 nvlist_t *zcr_ereport;
372 nvlist_t *zcr_detector;
373 void *zcr_cbdata;
374 size_t zcr_cbinfo; /* passed to zcr_free() */
375 uint64_t zcr_sector;
376 uint64_t zcr_align;
377 uint64_t zcr_length;
378 zio_cksum_finish_f *zcr_finish;
379 zio_cksum_free_f *zcr_free;
380
381 /* internal use only */
382 struct zio_bad_cksum *zcr_ckinfo; /* information from failure */
383 };
384
385 typedef struct zio_vsd_ops {
386 zio_done_func_t *vsd_free;
387 } zio_vsd_ops_t;
388
389 typedef struct zio_gang_node {
390 zio_gbh_phys_t *gn_gbh;
391 struct zio_gang_node *gn_child[SPA_GBH_NBLKPTRS];
392 } zio_gang_node_t;
393
394 typedef zio_t *zio_gang_issue_func_t(zio_t *zio, blkptr_t *bp,
395 zio_gang_node_t *gn, struct abd *data, uint64_t offset);
396
397 typedef void zio_transform_func_t(zio_t *zio, struct abd *data, uint64_t size);
398
399 typedef struct zio_transform {
400 struct abd *zt_orig_abd;
401 uint64_t zt_orig_size;
402 uint64_t zt_bufsize;
403 zio_transform_func_t *zt_transform;
404 struct zio_transform *zt_next;
405 } zio_transform_t;
406
407 typedef zio_t *zio_pipe_stage_t(zio_t *zio);
408
409 /*
410 * The io_reexecute flags are distinct from io_flags because the child must
411 * be able to propagate them to the parent. The normal io_flags are local
412 * to the zio, not protected by any lock, and not modifiable by children;
413 * the reexecute flags are protected by io_lock, modifiable by children,
414 * and always propagated -- even when ZIO_FLAG_DONT_PROPAGATE is set.
415 */
416 #define ZIO_REEXECUTE_NOW 0x01
417 #define ZIO_REEXECUTE_SUSPEND 0x02
418
419 /*
420 * The io_trim flags are used to specify the type of TRIM to perform. They
421 * only apply to ZIO_TYPE_TRIM zios are distinct from io_flags.
422 */
423 enum trim_flag {
424 ZIO_TRIM_SECURE = 1U << 0,
425 };
426
427 typedef struct zio_alloc_list {
428 list_t zal_list;
429 uint64_t zal_size;
430 } zio_alloc_list_t;
431
432 typedef struct zio_link {
433 zio_t *zl_parent;
434 zio_t *zl_child;
435 list_node_t zl_parent_node;
436 list_node_t zl_child_node;
437 } zio_link_t;
438
439 struct zio {
440 /* Core information about this I/O */
441 zbookmark_phys_t io_bookmark;
442 zio_prop_t io_prop;
443 zio_type_t io_type;
444 enum zio_child io_child_type;
445 enum trim_flag io_trim_flags;
446 int io_cmd;
447 zio_priority_t io_priority;
448 uint8_t io_reexecute;
449 uint8_t io_state[ZIO_WAIT_TYPES];
450 uint64_t io_txg;
451 spa_t *io_spa;
452 blkptr_t *io_bp;
453 blkptr_t *io_bp_override;
454 blkptr_t io_bp_copy;
455 list_t io_parent_list;
456 list_t io_child_list;
457 zio_t *io_logical;
458 zio_transform_t *io_transform_stack;
459
460 /* Callback info */
461 zio_done_func_t *io_ready;
462 zio_done_func_t *io_children_ready;
463 zio_done_func_t *io_physdone;
464 zio_done_func_t *io_done;
465 void *io_private;
466 int64_t io_prev_space_delta; /* DMU private */
467 blkptr_t io_bp_orig;
468 /* io_lsize != io_orig_size iff this is a raw write */
469 uint64_t io_lsize;
470
471 /* Data represented by this I/O */
472 struct abd *io_abd;
473 struct abd *io_orig_abd;
474 uint64_t io_size;
475 uint64_t io_orig_size;
476
477 /* Stuff for the vdev stack */
478 vdev_t *io_vd;
479 void *io_vsd;
480 const zio_vsd_ops_t *io_vsd_ops;
481 metaslab_class_t *io_metaslab_class; /* dva throttle class */
482
483 uint64_t io_offset;
484 hrtime_t io_timestamp; /* submitted at */
485 hrtime_t io_queued_timestamp;
486 hrtime_t io_target_timestamp;
487 hrtime_t io_delta; /* vdev queue service delta */
488 hrtime_t io_delay; /* Device access time (disk or */
489 /* file). */
490 avl_node_t io_queue_node;
491 avl_node_t io_offset_node;
492 avl_node_t io_alloc_node;
493 zio_alloc_list_t io_alloc_list;
494
495 /* Internal pipeline state */
496 zio_flag_t io_flags;
497 enum zio_stage io_stage;
498 enum zio_stage io_pipeline;
499 zio_flag_t io_orig_flags;
500 enum zio_stage io_orig_stage;
501 enum zio_stage io_orig_pipeline;
502 enum zio_stage io_pipeline_trace;
503 int io_error;
504 int io_child_error[ZIO_CHILD_TYPES];
505 uint64_t io_children[ZIO_CHILD_TYPES][ZIO_WAIT_TYPES];
506 uint64_t io_child_count;
507 uint64_t io_phys_children;
508 uint64_t io_parent_count;
509 uint64_t *io_stall;
510 zio_t *io_gang_leader;
511 zio_gang_node_t *io_gang_tree;
512 void *io_executor;
513 void *io_waiter;
514 void *io_bio;
515 kmutex_t io_lock;
516 kcondvar_t io_cv;
517 int io_allocator;
518
519 /* FMA state */
520 zio_cksum_report_t *io_cksum_report;
521 uint64_t io_ena;
522
523 /* Taskq dispatching state */
524 taskq_ent_t io_tqent;
525 };
526
527 enum blk_verify_flag {
528 BLK_VERIFY_ONLY,
529 BLK_VERIFY_LOG,
530 BLK_VERIFY_HALT
531 };
532
533 extern int zio_bookmark_compare(const void *, const void *);
534
535 extern zio_t *zio_null(zio_t *pio, spa_t *spa, vdev_t *vd,
536 zio_done_func_t *done, void *priv, zio_flag_t flags);
537
538 extern zio_t *zio_root(spa_t *spa,
539 zio_done_func_t *done, void *priv, zio_flag_t flags);
540
541 extern void zio_destroy(zio_t *zio);
542
543 extern zio_t *zio_read(zio_t *pio, spa_t *spa, const blkptr_t *bp,
544 struct abd *data, uint64_t lsize, zio_done_func_t *done, void *priv,
545 zio_priority_t priority, zio_flag_t flags, const zbookmark_phys_t *zb);
546
547 extern zio_t *zio_write(zio_t *pio, spa_t *spa, uint64_t txg, blkptr_t *bp,
548 struct abd *data, uint64_t size, uint64_t psize, const zio_prop_t *zp,
549 zio_done_func_t *ready, zio_done_func_t *children_ready,
550 zio_done_func_t *physdone, zio_done_func_t *done,
551 void *priv, zio_priority_t priority, zio_flag_t flags,
552 const zbookmark_phys_t *zb);
553
554 extern zio_t *zio_rewrite(zio_t *pio, spa_t *spa, uint64_t txg, blkptr_t *bp,
555 struct abd *data, uint64_t size, zio_done_func_t *done, void *priv,
556 zio_priority_t priority, zio_flag_t flags, zbookmark_phys_t *zb);
557
558 extern void zio_write_override(zio_t *zio, blkptr_t *bp, int copies,
559 boolean_t nopwrite);
560
561 extern void zio_free(spa_t *spa, uint64_t txg, const blkptr_t *bp);
562
563 extern zio_t *zio_claim(zio_t *pio, spa_t *spa, uint64_t txg,
564 const blkptr_t *bp,
565 zio_done_func_t *done, void *priv, zio_flag_t flags);
566
567 extern zio_t *zio_ioctl(zio_t *pio, spa_t *spa, vdev_t *vd, int cmd,
568 zio_done_func_t *done, void *priv, zio_flag_t flags);
569
570 extern zio_t *zio_trim(zio_t *pio, vdev_t *vd, uint64_t offset, uint64_t size,
571 zio_done_func_t *done, void *priv, zio_priority_t priority,
572 zio_flag_t flags, enum trim_flag trim_flags);
573
574 extern zio_t *zio_read_phys(zio_t *pio, vdev_t *vd, uint64_t offset,
575 uint64_t size, struct abd *data, int checksum,
576 zio_done_func_t *done, void *priv, zio_priority_t priority,
577 zio_flag_t flags, boolean_t labels);
578
579 extern zio_t *zio_write_phys(zio_t *pio, vdev_t *vd, uint64_t offset,
580 uint64_t size, struct abd *data, int checksum,
581 zio_done_func_t *done, void *priv, zio_priority_t priority,
582 zio_flag_t flags, boolean_t labels);
583
584 extern zio_t *zio_free_sync(zio_t *pio, spa_t *spa, uint64_t txg,
585 const blkptr_t *bp, zio_flag_t flags);
586
587 extern int zio_alloc_zil(spa_t *spa, objset_t *os, uint64_t txg,
588 blkptr_t *new_bp, uint64_t size, boolean_t *slog);
589 extern void zio_flush(zio_t *zio, vdev_t *vd);
590 extern void zio_shrink(zio_t *zio, uint64_t size);
591
592 extern int zio_wait(zio_t *zio);
593 extern void zio_nowait(zio_t *zio);
594 extern void zio_execute(void *zio);
595 extern void zio_interrupt(void *zio);
596 extern void zio_delay_init(zio_t *zio);
597 extern void zio_delay_interrupt(zio_t *zio);
598 extern void zio_deadman(zio_t *zio, const char *tag);
599
600 extern zio_t *zio_walk_parents(zio_t *cio, zio_link_t **);
601 extern zio_t *zio_walk_children(zio_t *pio, zio_link_t **);
602 extern zio_t *zio_unique_parent(zio_t *cio);
603 extern void zio_add_child(zio_t *pio, zio_t *cio);
604
605 extern void *zio_buf_alloc(size_t size);
606 extern void zio_buf_free(void *buf, size_t size);
607 extern void *zio_data_buf_alloc(size_t size);
608 extern void zio_data_buf_free(void *buf, size_t size);
609
610 extern void zio_push_transform(zio_t *zio, struct abd *abd, uint64_t size,
611 uint64_t bufsize, zio_transform_func_t *transform);
612 extern void zio_pop_transforms(zio_t *zio);
613
614 extern void zio_resubmit_stage_async(void *);
615
616 extern zio_t *zio_vdev_child_io(zio_t *zio, blkptr_t *bp, vdev_t *vd,
617 uint64_t offset, struct abd *data, uint64_t size, int type,
618 zio_priority_t priority, zio_flag_t flags,
619 zio_done_func_t *done, void *priv);
620
621 extern zio_t *zio_vdev_delegated_io(vdev_t *vd, uint64_t offset,
622 struct abd *data, uint64_t size, zio_type_t type, zio_priority_t priority,
623 zio_flag_t flags, zio_done_func_t *done, void *priv);
624
625 extern void zio_vdev_io_bypass(zio_t *zio);
626 extern void zio_vdev_io_reissue(zio_t *zio);
627 extern void zio_vdev_io_redone(zio_t *zio);
628
629 extern void zio_change_priority(zio_t *pio, zio_priority_t priority);
630
631 extern void zio_checksum_verified(zio_t *zio);
632 extern int zio_worst_error(int e1, int e2);
633
634 extern enum zio_checksum zio_checksum_select(enum zio_checksum child,
635 enum zio_checksum parent);
636 extern enum zio_checksum zio_checksum_dedup_select(spa_t *spa,
637 enum zio_checksum child, enum zio_checksum parent);
638 extern enum zio_compress zio_compress_select(spa_t *spa,
639 enum zio_compress child, enum zio_compress parent);
640 extern uint8_t zio_complevel_select(spa_t *spa, enum zio_compress compress,
641 uint8_t child, uint8_t parent);
642
643 extern void zio_suspend(spa_t *spa, zio_t *zio, zio_suspend_reason_t);
644 extern int zio_resume(spa_t *spa);
645 extern void zio_resume_wait(spa_t *spa);
646
647 extern boolean_t zfs_blkptr_verify(spa_t *spa, const blkptr_t *bp,
648 boolean_t config_held, enum blk_verify_flag blk_verify);
649
650 /*
651 * Initial setup and teardown.
652 */
653 extern void zio_init(void);
654 extern void zio_fini(void);
655
656 /*
657 * Fault injection
658 */
659 struct zinject_record;
660 extern uint32_t zio_injection_enabled;
661 extern int zio_inject_fault(char *name, int flags, int *id,
662 struct zinject_record *record);
663 extern int zio_inject_list_next(int *id, char *name, size_t buflen,
664 struct zinject_record *record);
665 extern int zio_clear_fault(int id);
666 extern void zio_handle_panic_injection(spa_t *spa, const char *tag,
667 uint64_t type);
668 extern int zio_handle_decrypt_injection(spa_t *spa, const zbookmark_phys_t *zb,
669 uint64_t type, int error);
670 extern int zio_handle_fault_injection(zio_t *zio, int error);
671 extern int zio_handle_device_injection(vdev_t *vd, zio_t *zio, int error);
672 extern int zio_handle_device_injections(vdev_t *vd, zio_t *zio, int err1,
673 int err2);
674 extern int zio_handle_label_injection(zio_t *zio, int error);
675 extern void zio_handle_ignored_writes(zio_t *zio);
676 extern hrtime_t zio_handle_io_delay(zio_t *zio);
677
678 /*
679 * Checksum ereport functions
680 */
681 extern int zfs_ereport_start_checksum(spa_t *spa, vdev_t *vd,
682 const zbookmark_phys_t *zb, struct zio *zio, uint64_t offset,
683 uint64_t length, struct zio_bad_cksum *info);
684 extern void zfs_ereport_finish_checksum(zio_cksum_report_t *report,
685 const abd_t *good_data, const abd_t *bad_data, boolean_t drop_if_identical);
686
687 extern void zfs_ereport_free_checksum(zio_cksum_report_t *report);
688
689 /* If we have the good data in hand, this function can be used */
690 extern int zfs_ereport_post_checksum(spa_t *spa, vdev_t *vd,
691 const zbookmark_phys_t *zb, struct zio *zio, uint64_t offset,
692 uint64_t length, const abd_t *good_data, const abd_t *bad_data,
693 struct zio_bad_cksum *info);
694
695 void zio_vsd_default_cksum_report(zio_t *zio, zio_cksum_report_t *zcr);
696 extern void zfs_ereport_snapshot_post(const char *subclass, spa_t *spa,
697 const char *name);
698
699 /* Called from spa_sync(), but primarily an injection handler */
700 extern void spa_handle_ignored_writes(spa_t *spa);
701
702 /* zbookmark_phys functions */
703 boolean_t zbookmark_subtree_completed(const struct dnode_phys *dnp,
704 const zbookmark_phys_t *subtree_root, const zbookmark_phys_t *last_block);
705 boolean_t zbookmark_subtree_tbd(const struct dnode_phys *dnp,
706 const zbookmark_phys_t *subtree_root, const zbookmark_phys_t *last_block);
707 int zbookmark_compare(uint16_t dbss1, uint8_t ibs1, uint16_t dbss2,
708 uint8_t ibs2, const zbookmark_phys_t *zb1, const zbookmark_phys_t *zb2);
709
710 #ifdef __cplusplus
711 }
712 #endif
713
714 #endif /* _ZIO_H */
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