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--- old/usr/src/uts/common/fs/zfs/sys/zio.h
+++ new/usr/src/uts/common/fs/zfs/sys/zio.h
1 1 /*
2 2 * CDDL HEADER START
3 3 *
4 4 * The contents of this file are subject to the terms of the
5 5 * Common Development and Distribution License (the "License").
6 6 * You may not use this file except in compliance with the License.
7 7 *
8 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 9 * or http://www.opensolaris.org/os/licensing.
10 10 * See the License for the specific language governing permissions
11 11 * and limitations under the License.
12 12 *
13 13 * When distributing Covered Code, include this CDDL HEADER in each
14 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 15 * If applicable, add the following below this CDDL HEADER, with the
16 16 * fields enclosed by brackets "[]" replaced with your own identifying
17 17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 18 *
19 19 * CDDL HEADER END
20 20 */
21 21
22 22 /*
23 23 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
24 24 * Copyright 2011 Nexenta Systems, Inc. All rights reserved.
25 25 * Copyright (c) 2012, 2014 by Delphix. All rights reserved.
26 26 * Copyright (c) 2013 by Saso Kiselkov. All rights reserved.
27 27 * Copyright (c) 2013, Joyent, Inc. All rights reserved.
28 28 */
29 29
30 30 #ifndef _ZIO_H
31 31 #define _ZIO_H
32 32
33 33 #include <sys/zfs_context.h>
34 34 #include <sys/spa.h>
35 35 #include <sys/txg.h>
36 36 #include <sys/avl.h>
37 37 #include <sys/fs/zfs.h>
38 38 #include <sys/zio_impl.h>
39 39
40 40 #ifdef __cplusplus
41 41 extern "C" {
42 42 #endif
43 43
44 44 /*
45 45 * Embedded checksum
46 46 */
47 47 #define ZEC_MAGIC 0x210da7ab10c7a11ULL
48 48
49 49 typedef struct zio_eck {
50 50 uint64_t zec_magic; /* for validation, endianness */
51 51 zio_cksum_t zec_cksum; /* 256-bit checksum */
52 52 } zio_eck_t;
53 53
54 54 /*
55 55 * Gang block headers are self-checksumming and contain an array
56 56 * of block pointers.
57 57 */
58 58 #define SPA_GANGBLOCKSIZE SPA_MINBLOCKSIZE
59 59 #define SPA_GBH_NBLKPTRS ((SPA_GANGBLOCKSIZE - \
60 60 sizeof (zio_eck_t)) / sizeof (blkptr_t))
61 61 #define SPA_GBH_FILLER ((SPA_GANGBLOCKSIZE - \
62 62 sizeof (zio_eck_t) - \
63 63 (SPA_GBH_NBLKPTRS * sizeof (blkptr_t))) /\
64 64 sizeof (uint64_t))
65 65
66 66 typedef struct zio_gbh {
67 67 blkptr_t zg_blkptr[SPA_GBH_NBLKPTRS];
68 68 uint64_t zg_filler[SPA_GBH_FILLER];
69 69 zio_eck_t zg_tail;
70 70 } zio_gbh_phys_t;
71 71
72 72 enum zio_checksum {
73 73 ZIO_CHECKSUM_INHERIT = 0,
74 74 ZIO_CHECKSUM_ON,
75 75 ZIO_CHECKSUM_OFF,
76 76 ZIO_CHECKSUM_LABEL,
77 77 ZIO_CHECKSUM_GANG_HEADER,
78 78 ZIO_CHECKSUM_ZILOG,
79 79 ZIO_CHECKSUM_FLETCHER_2,
80 80 ZIO_CHECKSUM_FLETCHER_4,
81 81 ZIO_CHECKSUM_SHA256,
82 82 ZIO_CHECKSUM_ZILOG2,
83 83 ZIO_CHECKSUM_NOPARITY,
84 84 ZIO_CHECKSUM_FUNCTIONS
85 85 };
86 86
87 87 /*
88 88 * The number of "legacy" compression functions which can be set on individual
89 89 * objects.
90 90 */
91 91 #define ZIO_CHECKSUM_LEGACY_FUNCTIONS ZIO_CHECKSUM_ZILOG2
92 92
93 93 #define ZIO_CHECKSUM_ON_VALUE ZIO_CHECKSUM_FLETCHER_4
94 94 #define ZIO_CHECKSUM_DEFAULT ZIO_CHECKSUM_ON
95 95
96 96 #define ZIO_CHECKSUM_MASK 0xffULL
97 97 #define ZIO_CHECKSUM_VERIFY (1 << 8)
98 98
99 99 #define ZIO_DEDUPCHECKSUM ZIO_CHECKSUM_SHA256
100 100 #define ZIO_DEDUPDITTO_MIN 100
101 101
102 102 enum zio_compress {
103 103 ZIO_COMPRESS_INHERIT = 0,
104 104 ZIO_COMPRESS_ON,
105 105 ZIO_COMPRESS_OFF,
106 106 ZIO_COMPRESS_LZJB,
107 107 ZIO_COMPRESS_EMPTY,
108 108 ZIO_COMPRESS_GZIP_1,
109 109 ZIO_COMPRESS_GZIP_2,
110 110 ZIO_COMPRESS_GZIP_3,
111 111 ZIO_COMPRESS_GZIP_4,
112 112 ZIO_COMPRESS_GZIP_5,
113 113 ZIO_COMPRESS_GZIP_6,
114 114 ZIO_COMPRESS_GZIP_7,
115 115 ZIO_COMPRESS_GZIP_8,
116 116 ZIO_COMPRESS_GZIP_9,
117 117 ZIO_COMPRESS_ZLE,
118 118 ZIO_COMPRESS_LZ4,
119 119 ZIO_COMPRESS_FUNCTIONS
120 120 };
121 121
122 122 /*
123 123 * The number of "legacy" compression functions which can be set on individual
124 124 * objects.
125 125 */
126 126 #define ZIO_COMPRESS_LEGACY_FUNCTIONS ZIO_COMPRESS_LZ4
127 127
128 128 /* N.B. when altering this value, also change BOOTFS_COMPRESS_VALID below */
129 129 #define ZIO_COMPRESS_ON_VALUE ZIO_COMPRESS_LZJB
130 130 #define ZIO_COMPRESS_DEFAULT ZIO_COMPRESS_OFF
131 131
132 132 #define BOOTFS_COMPRESS_VALID(compress) \
133 133 ((compress) == ZIO_COMPRESS_LZJB || \
134 134 (compress) == ZIO_COMPRESS_LZ4 || \
135 135 ((compress) == ZIO_COMPRESS_ON && \
136 136 ZIO_COMPRESS_ON_VALUE == ZIO_COMPRESS_LZJB) || \
137 137 (compress) == ZIO_COMPRESS_OFF)
138 138
139 139 #define ZIO_FAILURE_MODE_WAIT 0
140 140 #define ZIO_FAILURE_MODE_CONTINUE 1
141 141 #define ZIO_FAILURE_MODE_PANIC 2
142 142
143 143 typedef enum zio_priority {
144 144 ZIO_PRIORITY_SYNC_READ,
145 145 ZIO_PRIORITY_SYNC_WRITE, /* ZIL */
146 146 ZIO_PRIORITY_ASYNC_READ, /* prefetch */
147 147 ZIO_PRIORITY_ASYNC_WRITE, /* spa_sync() */
148 148 ZIO_PRIORITY_SCRUB, /* asynchronous scrub/resilver reads */
149 149 ZIO_PRIORITY_NUM_QUEUEABLE,
150 150
151 151 ZIO_PRIORITY_NOW /* non-queued i/os (e.g. free) */
152 152 } zio_priority_t;
153 153
154 154 #define ZIO_PIPELINE_CONTINUE 0x100
155 155 #define ZIO_PIPELINE_STOP 0x101
156 156
157 157 enum zio_flag {
158 158 /*
159 159 * Flags inherited by gang, ddt, and vdev children,
160 160 * and that must be equal for two zios to aggregate
161 161 */
162 162 ZIO_FLAG_DONT_AGGREGATE = 1 << 0,
163 163 ZIO_FLAG_IO_REPAIR = 1 << 1,
164 164 ZIO_FLAG_SELF_HEAL = 1 << 2,
165 165 ZIO_FLAG_RESILVER = 1 << 3,
166 166 ZIO_FLAG_SCRUB = 1 << 4,
167 167 ZIO_FLAG_SCAN_THREAD = 1 << 5,
168 168 ZIO_FLAG_PHYSICAL = 1 << 6,
169 169
170 170 #define ZIO_FLAG_AGG_INHERIT (ZIO_FLAG_CANFAIL - 1)
171 171
172 172 /*
173 173 * Flags inherited by ddt, gang, and vdev children.
174 174 */
175 175 ZIO_FLAG_CANFAIL = 1 << 7, /* must be first for INHERIT */
176 176 ZIO_FLAG_SPECULATIVE = 1 << 8,
177 177 ZIO_FLAG_CONFIG_WRITER = 1 << 9,
178 178 ZIO_FLAG_DONT_RETRY = 1 << 10,
179 179 ZIO_FLAG_DONT_CACHE = 1 << 11,
180 180 ZIO_FLAG_NODATA = 1 << 12,
181 181 ZIO_FLAG_INDUCE_DAMAGE = 1 << 13,
182 182
183 183 #define ZIO_FLAG_DDT_INHERIT (ZIO_FLAG_IO_RETRY - 1)
184 184 #define ZIO_FLAG_GANG_INHERIT (ZIO_FLAG_IO_RETRY - 1)
185 185
186 186 /*
187 187 * Flags inherited by vdev children.
188 188 */
189 189 ZIO_FLAG_IO_RETRY = 1 << 14, /* must be first for INHERIT */
190 190 ZIO_FLAG_PROBE = 1 << 15,
191 191 ZIO_FLAG_TRYHARD = 1 << 16,
192 192 ZIO_FLAG_OPTIONAL = 1 << 17,
193 193
194 194 #define ZIO_FLAG_VDEV_INHERIT (ZIO_FLAG_DONT_QUEUE - 1)
195 195
196 196 /*
197 197 * Flags not inherited by any children.
198 198 */
199 199 ZIO_FLAG_DONT_QUEUE = 1 << 18, /* must be first for INHERIT */
200 200 ZIO_FLAG_DONT_PROPAGATE = 1 << 19,
201 201 ZIO_FLAG_IO_BYPASS = 1 << 20,
202 202 ZIO_FLAG_IO_REWRITE = 1 << 21,
203 203 ZIO_FLAG_RAW = 1 << 22,
204 204 ZIO_FLAG_GANG_CHILD = 1 << 23,
205 205 ZIO_FLAG_DDT_CHILD = 1 << 24,
206 206 ZIO_FLAG_GODFATHER = 1 << 25,
207 207 ZIO_FLAG_NOPWRITE = 1 << 26,
208 208 ZIO_FLAG_REEXECUTED = 1 << 27,
209 209 ZIO_FLAG_DELEGATED = 1 << 28,
210 210 };
211 211
212 212 #define ZIO_FLAG_MUSTSUCCEED 0
213 213
214 214 #define ZIO_DDT_CHILD_FLAGS(zio) \
215 215 (((zio)->io_flags & ZIO_FLAG_DDT_INHERIT) | \
216 216 ZIO_FLAG_DDT_CHILD | ZIO_FLAG_CANFAIL)
217 217
218 218 #define ZIO_GANG_CHILD_FLAGS(zio) \
219 219 (((zio)->io_flags & ZIO_FLAG_GANG_INHERIT) | \
220 220 ZIO_FLAG_GANG_CHILD | ZIO_FLAG_CANFAIL)
221 221
222 222 #define ZIO_VDEV_CHILD_FLAGS(zio) \
223 223 (((zio)->io_flags & ZIO_FLAG_VDEV_INHERIT) | \
224 224 ZIO_FLAG_CANFAIL)
225 225
226 226 enum zio_child {
227 227 ZIO_CHILD_VDEV = 0,
228 228 ZIO_CHILD_GANG,
229 229 ZIO_CHILD_DDT,
230 230 ZIO_CHILD_LOGICAL,
231 231 ZIO_CHILD_TYPES
232 232 };
233 233
234 234 enum zio_wait_type {
235 235 ZIO_WAIT_READY = 0,
236 236 ZIO_WAIT_DONE,
237 237 ZIO_WAIT_TYPES
238 238 };
239 239
240 240 /*
241 241 * We'll take the unused errnos, 'EBADE' and 'EBADR' (from the Convergent
242 242 * graveyard) to indicate checksum errors and fragmentation.
243 243 */
244 244 #define ECKSUM EBADE
245 245 #define EFRAGS EBADR
246 246
247 247 typedef void zio_done_func_t(zio_t *zio);
248 248
249 249 extern const char *zio_type_name[ZIO_TYPES];
250 250
251 251 /*
252 252 * A bookmark is a four-tuple <objset, object, level, blkid> that uniquely
253 253 * identifies any block in the pool. By convention, the meta-objset (MOS)
254 254 * is objset 0, and the meta-dnode is object 0. This covers all blocks
255 255 * except root blocks and ZIL blocks, which are defined as follows:
256 256 *
257 257 * Root blocks (objset_phys_t) are object 0, level -1: <objset, 0, -1, 0>.
258 258 * ZIL blocks are bookmarked <objset, 0, -2, blkid == ZIL sequence number>.
259 259 * dmu_sync()ed ZIL data blocks are bookmarked <objset, object, -2, blkid>.
260 260 *
261 261 * Note: this structure is called a bookmark because its original purpose
262 262 * was to remember where to resume a pool-wide traverse.
263 263 *
264 264 * Note: this structure is passed between userland and the kernel, and is
265 265 * stored on disk (by virtue of being incorporated into other on-disk
266 266 * structures, e.g. dsl_scan_phys_t).
267 267 */
268 268 typedef struct zbookmark_phys {
269 269 uint64_t zb_objset;
270 270 uint64_t zb_object;
271 271 int64_t zb_level;
272 272 uint64_t zb_blkid;
273 273 } zbookmark_phys_t;
274 274
275 275 #define SET_BOOKMARK(zb, objset, object, level, blkid) \
276 276 { \
277 277 (zb)->zb_objset = objset; \
278 278 (zb)->zb_object = object; \
279 279 (zb)->zb_level = level; \
280 280 (zb)->zb_blkid = blkid; \
281 281 }
282 282
283 283 #define ZB_DESTROYED_OBJSET (-1ULL)
284 284
285 285 #define ZB_ROOT_OBJECT (0ULL)
286 286 #define ZB_ROOT_LEVEL (-1LL)
287 287 #define ZB_ROOT_BLKID (0ULL)
288 288
289 289 #define ZB_ZIL_OBJECT (0ULL)
290 290 #define ZB_ZIL_LEVEL (-2LL)
291 291
292 292 #define ZB_IS_ZERO(zb) \
293 293 ((zb)->zb_objset == 0 && (zb)->zb_object == 0 && \
294 294 (zb)->zb_level == 0 && (zb)->zb_blkid == 0)
295 295 #define ZB_IS_ROOT(zb) \
296 296 ((zb)->zb_object == ZB_ROOT_OBJECT && \
297 297 (zb)->zb_level == ZB_ROOT_LEVEL && \
298 298 (zb)->zb_blkid == ZB_ROOT_BLKID)
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299 299
300 300 typedef struct zio_prop {
301 301 enum zio_checksum zp_checksum;
302 302 enum zio_compress zp_compress;
303 303 dmu_object_type_t zp_type;
304 304 uint8_t zp_level;
305 305 uint8_t zp_copies;
306 306 boolean_t zp_dedup;
307 307 boolean_t zp_dedup_verify;
308 308 boolean_t zp_nopwrite;
309 + boolean_t zp_zero_write;
309 310 } zio_prop_t;
310 311
311 312 typedef struct zio_cksum_report zio_cksum_report_t;
312 313
313 314 typedef void zio_cksum_finish_f(zio_cksum_report_t *rep,
314 315 const void *good_data);
315 316 typedef void zio_cksum_free_f(void *cbdata, size_t size);
316 317
317 318 struct zio_bad_cksum; /* defined in zio_checksum.h */
318 319 struct dnode_phys;
319 320
320 321 struct zio_cksum_report {
321 322 struct zio_cksum_report *zcr_next;
322 323 nvlist_t *zcr_ereport;
323 324 nvlist_t *zcr_detector;
324 325 void *zcr_cbdata;
325 326 size_t zcr_cbinfo; /* passed to zcr_free() */
326 327 uint64_t zcr_align;
327 328 uint64_t zcr_length;
328 329 zio_cksum_finish_f *zcr_finish;
329 330 zio_cksum_free_f *zcr_free;
330 331
331 332 /* internal use only */
332 333 struct zio_bad_cksum *zcr_ckinfo; /* information from failure */
333 334 };
334 335
335 336 typedef void zio_vsd_cksum_report_f(zio_t *zio, zio_cksum_report_t *zcr,
336 337 void *arg);
337 338
338 339 zio_vsd_cksum_report_f zio_vsd_default_cksum_report;
339 340
340 341 typedef struct zio_vsd_ops {
341 342 zio_done_func_t *vsd_free;
342 343 zio_vsd_cksum_report_f *vsd_cksum_report;
343 344 } zio_vsd_ops_t;
344 345
345 346 typedef struct zio_gang_node {
346 347 zio_gbh_phys_t *gn_gbh;
347 348 struct zio_gang_node *gn_child[SPA_GBH_NBLKPTRS];
348 349 } zio_gang_node_t;
349 350
350 351 typedef zio_t *zio_gang_issue_func_t(zio_t *zio, blkptr_t *bp,
351 352 zio_gang_node_t *gn, void *data);
352 353
353 354 typedef void zio_transform_func_t(zio_t *zio, void *data, uint64_t size);
354 355
355 356 typedef struct zio_transform {
356 357 void *zt_orig_data;
357 358 uint64_t zt_orig_size;
358 359 uint64_t zt_bufsize;
359 360 zio_transform_func_t *zt_transform;
360 361 struct zio_transform *zt_next;
361 362 } zio_transform_t;
362 363
363 364 typedef int zio_pipe_stage_t(zio_t *zio);
364 365
365 366 /*
366 367 * The io_reexecute flags are distinct from io_flags because the child must
367 368 * be able to propagate them to the parent. The normal io_flags are local
368 369 * to the zio, not protected by any lock, and not modifiable by children;
369 370 * the reexecute flags are protected by io_lock, modifiable by children,
370 371 * and always propagated -- even when ZIO_FLAG_DONT_PROPAGATE is set.
371 372 */
372 373 #define ZIO_REEXECUTE_NOW 0x01
373 374 #define ZIO_REEXECUTE_SUSPEND 0x02
374 375
375 376 typedef struct zio_link {
376 377 zio_t *zl_parent;
377 378 zio_t *zl_child;
378 379 list_node_t zl_parent_node;
379 380 list_node_t zl_child_node;
380 381 } zio_link_t;
381 382
382 383 struct zio {
383 384 /* Core information about this I/O */
384 385 zbookmark_phys_t io_bookmark;
385 386 zio_prop_t io_prop;
386 387 zio_type_t io_type;
387 388 enum zio_child io_child_type;
388 389 int io_cmd;
389 390 zio_priority_t io_priority;
390 391 uint8_t io_reexecute;
391 392 uint8_t io_state[ZIO_WAIT_TYPES];
392 393 uint64_t io_txg;
393 394 spa_t *io_spa;
394 395 blkptr_t *io_bp;
395 396 blkptr_t *io_bp_override;
396 397 blkptr_t io_bp_copy;
397 398 list_t io_parent_list;
398 399 list_t io_child_list;
399 400 zio_link_t *io_walk_link;
400 401 zio_t *io_logical;
401 402 zio_transform_t *io_transform_stack;
402 403
403 404 /* Callback info */
404 405 zio_done_func_t *io_ready;
405 406 zio_done_func_t *io_physdone;
406 407 zio_done_func_t *io_done;
407 408 void *io_private;
408 409 int64_t io_prev_space_delta; /* DMU private */
409 410 blkptr_t io_bp_orig;
410 411
411 412 /* Data represented by this I/O */
412 413 void *io_data;
413 414 void *io_orig_data;
414 415 uint64_t io_size;
415 416 uint64_t io_orig_size;
416 417
417 418 /* Stuff for the vdev stack */
418 419 vdev_t *io_vd;
419 420 void *io_vsd;
420 421 const zio_vsd_ops_t *io_vsd_ops;
421 422
422 423 uint64_t io_offset;
423 424 hrtime_t io_timestamp;
424 425 avl_node_t io_queue_node;
425 426
426 427 /* Internal pipeline state */
427 428 enum zio_flag io_flags;
428 429 enum zio_stage io_stage;
429 430 enum zio_stage io_pipeline;
430 431 enum zio_flag io_orig_flags;
431 432 enum zio_stage io_orig_stage;
432 433 enum zio_stage io_orig_pipeline;
433 434 int io_error;
434 435 int io_child_error[ZIO_CHILD_TYPES];
435 436 uint64_t io_children[ZIO_CHILD_TYPES][ZIO_WAIT_TYPES];
436 437 uint64_t io_child_count;
437 438 uint64_t io_phys_children;
438 439 uint64_t io_parent_count;
439 440 uint64_t *io_stall;
440 441 zio_t *io_gang_leader;
441 442 zio_gang_node_t *io_gang_tree;
442 443 void *io_executor;
443 444 void *io_waiter;
444 445 kmutex_t io_lock;
445 446 kcondvar_t io_cv;
446 447
447 448 /* FMA state */
448 449 zio_cksum_report_t *io_cksum_report;
449 450 uint64_t io_ena;
450 451
451 452 /* Taskq dispatching state */
452 453 taskq_ent_t io_tqent;
453 454 };
454 455
455 456 extern zio_t *zio_null(zio_t *pio, spa_t *spa, vdev_t *vd,
456 457 zio_done_func_t *done, void *private, enum zio_flag flags);
457 458
458 459 extern zio_t *zio_root(spa_t *spa,
459 460 zio_done_func_t *done, void *private, enum zio_flag flags);
460 461
461 462 extern zio_t *zio_read(zio_t *pio, spa_t *spa, const blkptr_t *bp, void *data,
462 463 uint64_t size, zio_done_func_t *done, void *private,
463 464 zio_priority_t priority, enum zio_flag flags, const zbookmark_phys_t *zb);
464 465
465 466 extern zio_t *zio_write(zio_t *pio, spa_t *spa, uint64_t txg, blkptr_t *bp,
466 467 void *data, uint64_t size, const zio_prop_t *zp,
467 468 zio_done_func_t *ready, zio_done_func_t *physdone, zio_done_func_t *done,
468 469 void *private,
469 470 zio_priority_t priority, enum zio_flag flags, const zbookmark_phys_t *zb);
470 471
471 472 extern zio_t *zio_rewrite(zio_t *pio, spa_t *spa, uint64_t txg, blkptr_t *bp,
472 473 void *data, uint64_t size, zio_done_func_t *done, void *private,
473 474 zio_priority_t priority, enum zio_flag flags, zbookmark_phys_t *zb);
474 475
475 476 extern void zio_write_override(zio_t *zio, blkptr_t *bp, int copies,
476 477 boolean_t nopwrite);
477 478
478 479 extern void zio_free(spa_t *spa, uint64_t txg, const blkptr_t *bp);
479 480
480 481 extern zio_t *zio_claim(zio_t *pio, spa_t *spa, uint64_t txg,
481 482 const blkptr_t *bp,
482 483 zio_done_func_t *done, void *private, enum zio_flag flags);
483 484
484 485 extern zio_t *zio_ioctl(zio_t *pio, spa_t *spa, vdev_t *vd, int cmd,
485 486 zio_done_func_t *done, void *private, enum zio_flag flags);
486 487
487 488 extern zio_t *zio_read_phys(zio_t *pio, vdev_t *vd, uint64_t offset,
488 489 uint64_t size, void *data, int checksum,
489 490 zio_done_func_t *done, void *private, zio_priority_t priority,
490 491 enum zio_flag flags, boolean_t labels);
491 492
492 493 extern zio_t *zio_write_phys(zio_t *pio, vdev_t *vd, uint64_t offset,
493 494 uint64_t size, void *data, int checksum,
494 495 zio_done_func_t *done, void *private, zio_priority_t priority,
495 496 enum zio_flag flags, boolean_t labels);
496 497
497 498 extern zio_t *zio_free_sync(zio_t *pio, spa_t *spa, uint64_t txg,
498 499 const blkptr_t *bp, enum zio_flag flags);
499 500
500 501 extern int zio_alloc_zil(spa_t *spa, uint64_t txg, blkptr_t *new_bp,
501 502 blkptr_t *old_bp, uint64_t size, boolean_t use_slog);
502 503 extern void zio_free_zil(spa_t *spa, uint64_t txg, blkptr_t *bp);
503 504 extern void zio_flush(zio_t *zio, vdev_t *vd);
504 505 extern void zio_shrink(zio_t *zio, uint64_t size);
505 506
506 507 extern int zio_wait(zio_t *zio);
507 508 extern void zio_nowait(zio_t *zio);
508 509 extern void zio_execute(zio_t *zio);
509 510 extern void zio_interrupt(zio_t *zio);
510 511
511 512 extern zio_t *zio_walk_parents(zio_t *cio);
512 513 extern zio_t *zio_walk_children(zio_t *pio);
513 514 extern zio_t *zio_unique_parent(zio_t *cio);
514 515 extern void zio_add_child(zio_t *pio, zio_t *cio);
515 516
516 517 extern void *zio_buf_alloc(size_t size);
517 518 extern void zio_buf_free(void *buf, size_t size);
518 519 extern void *zio_data_buf_alloc(size_t size);
519 520 extern void zio_data_buf_free(void *buf, size_t size);
520 521
521 522 extern void zio_resubmit_stage_async(void *);
522 523
523 524 extern zio_t *zio_vdev_child_io(zio_t *zio, blkptr_t *bp, vdev_t *vd,
524 525 uint64_t offset, void *data, uint64_t size, int type,
525 526 zio_priority_t priority, enum zio_flag flags,
526 527 zio_done_func_t *done, void *private);
527 528
528 529 extern zio_t *zio_vdev_delegated_io(vdev_t *vd, uint64_t offset,
529 530 void *data, uint64_t size, int type, zio_priority_t priority,
530 531 enum zio_flag flags, zio_done_func_t *done, void *private);
531 532
532 533 extern void zio_vdev_io_bypass(zio_t *zio);
533 534 extern void zio_vdev_io_reissue(zio_t *zio);
534 535 extern void zio_vdev_io_redone(zio_t *zio);
535 536
536 537 extern void zio_checksum_verified(zio_t *zio);
537 538 extern int zio_worst_error(int e1, int e2);
538 539
539 540 extern enum zio_checksum zio_checksum_select(enum zio_checksum child,
540 541 enum zio_checksum parent);
541 542 extern enum zio_checksum zio_checksum_dedup_select(spa_t *spa,
542 543 enum zio_checksum child, enum zio_checksum parent);
543 544 extern enum zio_compress zio_compress_select(enum zio_compress child,
544 545 enum zio_compress parent);
545 546
546 547 extern void zio_suspend(spa_t *spa, zio_t *zio);
547 548 extern int zio_resume(spa_t *spa);
548 549 extern void zio_resume_wait(spa_t *spa);
549 550
550 551 /*
551 552 * Initial setup and teardown.
552 553 */
553 554 extern void zio_init(void);
554 555 extern void zio_fini(void);
555 556
556 557 /*
557 558 * Fault injection
558 559 */
559 560 struct zinject_record;
560 561 extern uint32_t zio_injection_enabled;
561 562 extern int zio_inject_fault(char *name, int flags, int *id,
562 563 struct zinject_record *record);
563 564 extern int zio_inject_list_next(int *id, char *name, size_t buflen,
564 565 struct zinject_record *record);
565 566 extern int zio_clear_fault(int id);
566 567 extern void zio_handle_panic_injection(spa_t *spa, char *tag, uint64_t type);
567 568 extern int zio_handle_fault_injection(zio_t *zio, int error);
568 569 extern int zio_handle_device_injection(vdev_t *vd, zio_t *zio, int error);
569 570 extern int zio_handle_label_injection(zio_t *zio, int error);
570 571 extern void zio_handle_ignored_writes(zio_t *zio);
571 572 extern uint64_t zio_handle_io_delay(zio_t *zio);
572 573
573 574 /*
574 575 * Checksum ereport functions
575 576 */
576 577 extern void zfs_ereport_start_checksum(spa_t *spa, vdev_t *vd, struct zio *zio,
577 578 uint64_t offset, uint64_t length, void *arg, struct zio_bad_cksum *info);
578 579 extern void zfs_ereport_finish_checksum(zio_cksum_report_t *report,
579 580 const void *good_data, const void *bad_data, boolean_t drop_if_identical);
580 581
581 582 extern void zfs_ereport_send_interim_checksum(zio_cksum_report_t *report);
582 583 extern void zfs_ereport_free_checksum(zio_cksum_report_t *report);
583 584
584 585 /* If we have the good data in hand, this function can be used */
585 586 extern void zfs_ereport_post_checksum(spa_t *spa, vdev_t *vd,
586 587 struct zio *zio, uint64_t offset, uint64_t length,
587 588 const void *good_data, const void *bad_data, struct zio_bad_cksum *info);
588 589
589 590 /* Called from spa_sync(), but primarily an injection handler */
590 591 extern void spa_handle_ignored_writes(spa_t *spa);
591 592
592 593 /* zbookmark_phys functions */
593 594 boolean_t zbookmark_is_before(const struct dnode_phys *dnp,
594 595 const zbookmark_phys_t *zb1, const zbookmark_phys_t *zb2);
595 596
596 597 #ifdef __cplusplus
597 598 }
598 599 #endif
599 600
600 601 #endif /* _ZIO_H */
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