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Integrated Edon-R hash function.
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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 by Delphix. All rights reserved.
26 26 * Copyright (c) 2013 by Saso Kiselkov. All rights reserved.
27 27 */
28 28
29 29 #ifndef _ZIO_H
30 30 #define _ZIO_H
31 31
32 32 #include <sys/zfs_context.h>
33 33 #include <sys/spa.h>
34 34 #include <sys/txg.h>
35 35 #include <sys/avl.h>
36 36 #include <sys/fs/zfs.h>
37 37 #include <sys/zio_impl.h>
38 38
39 39 #ifdef __cplusplus
40 40 extern "C" {
41 41 #endif
42 42
43 43 /*
44 44 * Embedded checksum
45 45 */
46 46 #define ZEC_MAGIC 0x210da7ab10c7a11ULL
47 47
48 48 typedef struct zio_eck {
49 49 uint64_t zec_magic; /* for validation, endianness */
50 50 zio_cksum_t zec_cksum; /* 256-bit checksum */
51 51 } zio_eck_t;
52 52
53 53 /*
54 54 * Gang block headers are self-checksumming and contain an array
55 55 * of block pointers.
56 56 */
57 57 #define SPA_GANGBLOCKSIZE SPA_MINBLOCKSIZE
58 58 #define SPA_GBH_NBLKPTRS ((SPA_GANGBLOCKSIZE - \
59 59 sizeof (zio_eck_t)) / sizeof (blkptr_t))
60 60 #define SPA_GBH_FILLER ((SPA_GANGBLOCKSIZE - \
61 61 sizeof (zio_eck_t) - \
62 62 (SPA_GBH_NBLKPTRS * sizeof (blkptr_t))) /\
63 63 sizeof (uint64_t))
64 64
65 65 typedef struct zio_gbh {
66 66 blkptr_t zg_blkptr[SPA_GBH_NBLKPTRS];
67 67 uint64_t zg_filler[SPA_GBH_FILLER];
68 68 zio_eck_t zg_tail;
69 69 } zio_gbh_phys_t;
70 70
71 71 enum zio_checksum {
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71 lines elided |
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72 72 ZIO_CHECKSUM_INHERIT = 0,
73 73 ZIO_CHECKSUM_ON,
74 74 ZIO_CHECKSUM_OFF,
75 75 ZIO_CHECKSUM_LABEL,
76 76 ZIO_CHECKSUM_GANG_HEADER,
77 77 ZIO_CHECKSUM_ZILOG,
78 78 ZIO_CHECKSUM_FLETCHER_2,
79 79 ZIO_CHECKSUM_FLETCHER_4,
80 80 ZIO_CHECKSUM_SHA256,
81 81 ZIO_CHECKSUM_ZILOG2,
82 + ZIO_CHECKSUM_EDONR512_256,
82 83 ZIO_CHECKSUM_FUNCTIONS
83 84 };
84 85
85 86 #define ZIO_CHECKSUM_ON_VALUE ZIO_CHECKSUM_FLETCHER_4
86 87 #define ZIO_CHECKSUM_DEFAULT ZIO_CHECKSUM_ON
87 88
88 89 #define ZIO_CHECKSUM_MASK 0xffULL
89 90 #define ZIO_CHECKSUM_VERIFY (1 << 8)
90 91
91 92 #define ZIO_DEDUPCHECKSUM ZIO_CHECKSUM_SHA256
92 93 #define ZIO_DEDUPDITTO_MIN 100
93 94
94 95 enum zio_compress {
95 96 ZIO_COMPRESS_INHERIT = 0,
96 97 ZIO_COMPRESS_ON,
97 98 ZIO_COMPRESS_OFF,
98 99 ZIO_COMPRESS_LZJB,
99 100 ZIO_COMPRESS_EMPTY,
100 101 ZIO_COMPRESS_GZIP_1,
101 102 ZIO_COMPRESS_GZIP_2,
102 103 ZIO_COMPRESS_GZIP_3,
103 104 ZIO_COMPRESS_GZIP_4,
104 105 ZIO_COMPRESS_GZIP_5,
105 106 ZIO_COMPRESS_GZIP_6,
106 107 ZIO_COMPRESS_GZIP_7,
107 108 ZIO_COMPRESS_GZIP_8,
108 109 ZIO_COMPRESS_GZIP_9,
109 110 ZIO_COMPRESS_ZLE,
110 111 ZIO_COMPRESS_LZ4,
111 112 ZIO_COMPRESS_FUNCTIONS
112 113 };
113 114
114 115 /* N.B. when altering this value, also change BOOTFS_COMPRESS_VALID below */
115 116 #define ZIO_COMPRESS_ON_VALUE ZIO_COMPRESS_LZJB
116 117 #define ZIO_COMPRESS_DEFAULT ZIO_COMPRESS_OFF
117 118
118 119 #define BOOTFS_COMPRESS_VALID(compress) \
119 120 ((compress) == ZIO_COMPRESS_LZJB || \
120 121 (compress) == ZIO_COMPRESS_LZ4 || \
121 122 ((compress) == ZIO_COMPRESS_ON && \
122 123 ZIO_COMPRESS_ON_VALUE == ZIO_COMPRESS_LZJB) || \
123 124 (compress) == ZIO_COMPRESS_OFF)
124 125
125 126 #define ZIO_FAILURE_MODE_WAIT 0
126 127 #define ZIO_FAILURE_MODE_CONTINUE 1
127 128 #define ZIO_FAILURE_MODE_PANIC 2
128 129
129 130 #define ZIO_PRIORITY_NOW (zio_priority_table[0])
130 131 #define ZIO_PRIORITY_SYNC_READ (zio_priority_table[1])
131 132 #define ZIO_PRIORITY_SYNC_WRITE (zio_priority_table[2])
132 133 #define ZIO_PRIORITY_LOG_WRITE (zio_priority_table[3])
133 134 #define ZIO_PRIORITY_CACHE_FILL (zio_priority_table[4])
134 135 #define ZIO_PRIORITY_AGG (zio_priority_table[5])
135 136 #define ZIO_PRIORITY_FREE (zio_priority_table[6])
136 137 #define ZIO_PRIORITY_ASYNC_WRITE (zio_priority_table[7])
137 138 #define ZIO_PRIORITY_ASYNC_READ (zio_priority_table[8])
138 139 #define ZIO_PRIORITY_RESILVER (zio_priority_table[9])
139 140 #define ZIO_PRIORITY_SCRUB (zio_priority_table[10])
140 141 #define ZIO_PRIORITY_DDT_PREFETCH (zio_priority_table[11])
141 142 #define ZIO_PRIORITY_TABLE_SIZE 12
142 143
143 144 #define ZIO_PIPELINE_CONTINUE 0x100
144 145 #define ZIO_PIPELINE_STOP 0x101
145 146
146 147 enum zio_flag {
147 148 /*
148 149 * Flags inherited by gang, ddt, and vdev children,
149 150 * and that must be equal for two zios to aggregate
150 151 */
151 152 ZIO_FLAG_DONT_AGGREGATE = 1 << 0,
152 153 ZIO_FLAG_IO_REPAIR = 1 << 1,
153 154 ZIO_FLAG_SELF_HEAL = 1 << 2,
154 155 ZIO_FLAG_RESILVER = 1 << 3,
155 156 ZIO_FLAG_SCRUB = 1 << 4,
156 157 ZIO_FLAG_SCAN_THREAD = 1 << 5,
157 158
158 159 #define ZIO_FLAG_AGG_INHERIT (ZIO_FLAG_CANFAIL - 1)
159 160
160 161 /*
161 162 * Flags inherited by ddt, gang, and vdev children.
162 163 */
163 164 ZIO_FLAG_CANFAIL = 1 << 6, /* must be first for INHERIT */
164 165 ZIO_FLAG_SPECULATIVE = 1 << 7,
165 166 ZIO_FLAG_CONFIG_WRITER = 1 << 8,
166 167 ZIO_FLAG_DONT_RETRY = 1 << 9,
167 168 ZIO_FLAG_DONT_CACHE = 1 << 10,
168 169 ZIO_FLAG_NODATA = 1 << 11,
169 170 ZIO_FLAG_INDUCE_DAMAGE = 1 << 12,
170 171
171 172 #define ZIO_FLAG_DDT_INHERIT (ZIO_FLAG_IO_RETRY - 1)
172 173 #define ZIO_FLAG_GANG_INHERIT (ZIO_FLAG_IO_RETRY - 1)
173 174
174 175 /*
175 176 * Flags inherited by vdev children.
176 177 */
177 178 ZIO_FLAG_IO_RETRY = 1 << 13, /* must be first for INHERIT */
178 179 ZIO_FLAG_PROBE = 1 << 14,
179 180 ZIO_FLAG_TRYHARD = 1 << 15,
180 181 ZIO_FLAG_OPTIONAL = 1 << 16,
181 182
182 183 #define ZIO_FLAG_VDEV_INHERIT (ZIO_FLAG_DONT_QUEUE - 1)
183 184
184 185 /*
185 186 * Flags not inherited by any children.
186 187 */
187 188 ZIO_FLAG_DONT_QUEUE = 1 << 17, /* must be first for INHERIT */
188 189 ZIO_FLAG_DONT_PROPAGATE = 1 << 18,
189 190 ZIO_FLAG_IO_BYPASS = 1 << 19,
190 191 ZIO_FLAG_IO_REWRITE = 1 << 20,
191 192 ZIO_FLAG_RAW = 1 << 21,
192 193 ZIO_FLAG_GANG_CHILD = 1 << 22,
193 194 ZIO_FLAG_DDT_CHILD = 1 << 23,
194 195 ZIO_FLAG_GODFATHER = 1 << 24,
195 196 ZIO_FLAG_NOPWRITE = 1 << 25,
196 197 ZIO_FLAG_REEXECUTED = 1 << 26,
197 198 };
198 199
199 200 #define ZIO_FLAG_MUSTSUCCEED 0
200 201
201 202 #define ZIO_DDT_CHILD_FLAGS(zio) \
202 203 (((zio)->io_flags & ZIO_FLAG_DDT_INHERIT) | \
203 204 ZIO_FLAG_DDT_CHILD | ZIO_FLAG_CANFAIL)
204 205
205 206 #define ZIO_GANG_CHILD_FLAGS(zio) \
206 207 (((zio)->io_flags & ZIO_FLAG_GANG_INHERIT) | \
207 208 ZIO_FLAG_GANG_CHILD | ZIO_FLAG_CANFAIL)
208 209
209 210 #define ZIO_VDEV_CHILD_FLAGS(zio) \
210 211 (((zio)->io_flags & ZIO_FLAG_VDEV_INHERIT) | \
211 212 ZIO_FLAG_CANFAIL)
212 213
213 214 enum zio_child {
214 215 ZIO_CHILD_VDEV = 0,
215 216 ZIO_CHILD_GANG,
216 217 ZIO_CHILD_DDT,
217 218 ZIO_CHILD_LOGICAL,
218 219 ZIO_CHILD_TYPES
219 220 };
220 221
221 222 enum zio_wait_type {
222 223 ZIO_WAIT_READY = 0,
223 224 ZIO_WAIT_DONE,
224 225 ZIO_WAIT_TYPES
225 226 };
226 227
227 228 /*
228 229 * We'll take the unused errnos, 'EBADE' and 'EBADR' (from the Convergent
229 230 * graveyard) to indicate checksum errors and fragmentation.
230 231 */
231 232 #define ECKSUM EBADE
232 233 #define EFRAGS EBADR
233 234
234 235 typedef void zio_done_func_t(zio_t *zio);
235 236
236 237 extern uint8_t zio_priority_table[ZIO_PRIORITY_TABLE_SIZE];
237 238 extern char *zio_type_name[ZIO_TYPES];
238 239
239 240 /*
240 241 * A bookmark is a four-tuple <objset, object, level, blkid> that uniquely
241 242 * identifies any block in the pool. By convention, the meta-objset (MOS)
242 243 * is objset 0, and the meta-dnode is object 0. This covers all blocks
243 244 * except root blocks and ZIL blocks, which are defined as follows:
244 245 *
245 246 * Root blocks (objset_phys_t) are object 0, level -1: <objset, 0, -1, 0>.
246 247 * ZIL blocks are bookmarked <objset, 0, -2, blkid == ZIL sequence number>.
247 248 * dmu_sync()ed ZIL data blocks are bookmarked <objset, object, -2, blkid>.
248 249 *
249 250 * Note: this structure is called a bookmark because its original purpose
250 251 * was to remember where to resume a pool-wide traverse.
251 252 *
252 253 * Note: this structure is passed between userland and the kernel.
253 254 * Therefore it must not change size or alignment between 32/64 bit
254 255 * compilation options.
255 256 */
256 257 typedef struct zbookmark {
257 258 uint64_t zb_objset;
258 259 uint64_t zb_object;
259 260 int64_t zb_level;
260 261 uint64_t zb_blkid;
261 262 } zbookmark_t;
262 263
263 264 #define SET_BOOKMARK(zb, objset, object, level, blkid) \
264 265 { \
265 266 (zb)->zb_objset = objset; \
266 267 (zb)->zb_object = object; \
267 268 (zb)->zb_level = level; \
268 269 (zb)->zb_blkid = blkid; \
269 270 }
270 271
271 272 #define ZB_DESTROYED_OBJSET (-1ULL)
272 273
273 274 #define ZB_ROOT_OBJECT (0ULL)
274 275 #define ZB_ROOT_LEVEL (-1LL)
275 276 #define ZB_ROOT_BLKID (0ULL)
276 277
277 278 #define ZB_ZIL_OBJECT (0ULL)
278 279 #define ZB_ZIL_LEVEL (-2LL)
279 280
280 281 #define ZB_IS_ZERO(zb) \
281 282 ((zb)->zb_objset == 0 && (zb)->zb_object == 0 && \
282 283 (zb)->zb_level == 0 && (zb)->zb_blkid == 0)
283 284 #define ZB_IS_ROOT(zb) \
284 285 ((zb)->zb_object == ZB_ROOT_OBJECT && \
285 286 (zb)->zb_level == ZB_ROOT_LEVEL && \
286 287 (zb)->zb_blkid == ZB_ROOT_BLKID)
287 288
288 289 typedef struct zio_prop {
289 290 enum zio_checksum zp_checksum;
290 291 enum zio_compress zp_compress;
291 292 dmu_object_type_t zp_type;
292 293 uint8_t zp_level;
293 294 uint8_t zp_copies;
294 295 boolean_t zp_dedup;
295 296 boolean_t zp_dedup_verify;
296 297 boolean_t zp_nopwrite;
297 298 } zio_prop_t;
298 299
299 300 typedef struct zio_cksum_report zio_cksum_report_t;
300 301
301 302 typedef void zio_cksum_finish_f(zio_cksum_report_t *rep,
302 303 const void *good_data);
303 304 typedef void zio_cksum_free_f(void *cbdata, size_t size);
304 305
305 306 struct zio_bad_cksum; /* defined in zio_checksum.h */
306 307 struct dnode_phys;
307 308
308 309 struct zio_cksum_report {
309 310 struct zio_cksum_report *zcr_next;
310 311 nvlist_t *zcr_ereport;
311 312 nvlist_t *zcr_detector;
312 313 void *zcr_cbdata;
313 314 size_t zcr_cbinfo; /* passed to zcr_free() */
314 315 uint64_t zcr_align;
315 316 uint64_t zcr_length;
316 317 zio_cksum_finish_f *zcr_finish;
317 318 zio_cksum_free_f *zcr_free;
318 319
319 320 /* internal use only */
320 321 struct zio_bad_cksum *zcr_ckinfo; /* information from failure */
321 322 };
322 323
323 324 typedef void zio_vsd_cksum_report_f(zio_t *zio, zio_cksum_report_t *zcr,
324 325 void *arg);
325 326
326 327 zio_vsd_cksum_report_f zio_vsd_default_cksum_report;
327 328
328 329 typedef struct zio_vsd_ops {
329 330 zio_done_func_t *vsd_free;
330 331 zio_vsd_cksum_report_f *vsd_cksum_report;
331 332 } zio_vsd_ops_t;
332 333
333 334 typedef struct zio_gang_node {
334 335 zio_gbh_phys_t *gn_gbh;
335 336 struct zio_gang_node *gn_child[SPA_GBH_NBLKPTRS];
336 337 } zio_gang_node_t;
337 338
338 339 typedef zio_t *zio_gang_issue_func_t(zio_t *zio, blkptr_t *bp,
339 340 zio_gang_node_t *gn, void *data);
340 341
341 342 typedef void zio_transform_func_t(zio_t *zio, void *data, uint64_t size);
342 343
343 344 typedef struct zio_transform {
344 345 void *zt_orig_data;
345 346 uint64_t zt_orig_size;
346 347 uint64_t zt_bufsize;
347 348 zio_transform_func_t *zt_transform;
348 349 struct zio_transform *zt_next;
349 350 } zio_transform_t;
350 351
351 352 typedef int zio_pipe_stage_t(zio_t *zio);
352 353
353 354 /*
354 355 * The io_reexecute flags are distinct from io_flags because the child must
355 356 * be able to propagate them to the parent. The normal io_flags are local
356 357 * to the zio, not protected by any lock, and not modifiable by children;
357 358 * the reexecute flags are protected by io_lock, modifiable by children,
358 359 * and always propagated -- even when ZIO_FLAG_DONT_PROPAGATE is set.
359 360 */
360 361 #define ZIO_REEXECUTE_NOW 0x01
361 362 #define ZIO_REEXECUTE_SUSPEND 0x02
362 363
363 364 typedef struct zio_link {
364 365 zio_t *zl_parent;
365 366 zio_t *zl_child;
366 367 list_node_t zl_parent_node;
367 368 list_node_t zl_child_node;
368 369 } zio_link_t;
369 370
370 371 struct zio {
371 372 /* Core information about this I/O */
372 373 zbookmark_t io_bookmark;
373 374 zio_prop_t io_prop;
374 375 zio_type_t io_type;
375 376 enum zio_child io_child_type;
376 377 int io_cmd;
377 378 uint8_t io_priority;
378 379 uint8_t io_reexecute;
379 380 uint8_t io_state[ZIO_WAIT_TYPES];
380 381 uint64_t io_txg;
381 382 spa_t *io_spa;
382 383 blkptr_t *io_bp;
383 384 blkptr_t *io_bp_override;
384 385 blkptr_t io_bp_copy;
385 386 list_t io_parent_list;
386 387 list_t io_child_list;
387 388 zio_link_t *io_walk_link;
388 389 zio_t *io_logical;
389 390 zio_transform_t *io_transform_stack;
390 391
391 392 /* Callback info */
392 393 zio_done_func_t *io_ready;
393 394 zio_done_func_t *io_done;
394 395 void *io_private;
395 396 int64_t io_prev_space_delta; /* DMU private */
396 397 blkptr_t io_bp_orig;
397 398
398 399 /* Data represented by this I/O */
399 400 void *io_data;
400 401 void *io_orig_data;
401 402 uint64_t io_size;
402 403 uint64_t io_orig_size;
403 404
404 405 /* Stuff for the vdev stack */
405 406 vdev_t *io_vd;
406 407 void *io_vsd;
407 408 const zio_vsd_ops_t *io_vsd_ops;
408 409
409 410 uint64_t io_offset;
410 411 uint64_t io_deadline;
411 412 uint64_t io_timestamp;
412 413 avl_node_t io_offset_node;
413 414 avl_node_t io_deadline_node;
414 415 avl_tree_t *io_vdev_tree;
415 416
416 417 /* Internal pipeline state */
417 418 enum zio_flag io_flags;
418 419 enum zio_stage io_stage;
419 420 enum zio_stage io_pipeline;
420 421 enum zio_flag io_orig_flags;
421 422 enum zio_stage io_orig_stage;
422 423 enum zio_stage io_orig_pipeline;
423 424 int io_error;
424 425 int io_child_error[ZIO_CHILD_TYPES];
425 426 uint64_t io_children[ZIO_CHILD_TYPES][ZIO_WAIT_TYPES];
426 427 uint64_t io_child_count;
427 428 uint64_t io_parent_count;
428 429 uint64_t *io_stall;
429 430 zio_t *io_gang_leader;
430 431 zio_gang_node_t *io_gang_tree;
431 432 void *io_executor;
432 433 void *io_waiter;
433 434 kmutex_t io_lock;
434 435 kcondvar_t io_cv;
435 436
436 437 /* FMA state */
437 438 zio_cksum_report_t *io_cksum_report;
438 439 uint64_t io_ena;
439 440
440 441 /* Taskq dispatching state */
441 442 taskq_ent_t io_tqent;
442 443 };
443 444
444 445 extern zio_t *zio_null(zio_t *pio, spa_t *spa, vdev_t *vd,
445 446 zio_done_func_t *done, void *private, enum zio_flag flags);
446 447
447 448 extern zio_t *zio_root(spa_t *spa,
448 449 zio_done_func_t *done, void *private, enum zio_flag flags);
449 450
450 451 extern zio_t *zio_read(zio_t *pio, spa_t *spa, const blkptr_t *bp, void *data,
451 452 uint64_t size, zio_done_func_t *done, void *private,
452 453 int priority, enum zio_flag flags, const zbookmark_t *zb);
453 454
454 455 extern zio_t *zio_write(zio_t *pio, spa_t *spa, uint64_t txg, blkptr_t *bp,
455 456 void *data, uint64_t size, const zio_prop_t *zp,
456 457 zio_done_func_t *ready, zio_done_func_t *done, void *private,
457 458 int priority, enum zio_flag flags, const zbookmark_t *zb);
458 459
459 460 extern zio_t *zio_rewrite(zio_t *pio, spa_t *spa, uint64_t txg, blkptr_t *bp,
460 461 void *data, uint64_t size, zio_done_func_t *done, void *private,
461 462 int priority, enum zio_flag flags, zbookmark_t *zb);
462 463
463 464 extern void zio_write_override(zio_t *zio, blkptr_t *bp, int copies,
464 465 boolean_t nopwrite);
465 466
466 467 extern void zio_free(spa_t *spa, uint64_t txg, const blkptr_t *bp);
467 468
468 469 extern zio_t *zio_claim(zio_t *pio, spa_t *spa, uint64_t txg,
469 470 const blkptr_t *bp,
470 471 zio_done_func_t *done, void *private, enum zio_flag flags);
471 472
472 473 extern zio_t *zio_ioctl(zio_t *pio, spa_t *spa, vdev_t *vd, int cmd,
473 474 zio_done_func_t *done, void *private, int priority, enum zio_flag flags);
474 475
475 476 extern zio_t *zio_read_phys(zio_t *pio, vdev_t *vd, uint64_t offset,
476 477 uint64_t size, void *data, int checksum,
477 478 zio_done_func_t *done, void *private, int priority, enum zio_flag flags,
478 479 boolean_t labels);
479 480
480 481 extern zio_t *zio_write_phys(zio_t *pio, vdev_t *vd, uint64_t offset,
481 482 uint64_t size, void *data, int checksum,
482 483 zio_done_func_t *done, void *private, int priority, enum zio_flag flags,
483 484 boolean_t labels);
484 485
485 486 extern zio_t *zio_free_sync(zio_t *pio, spa_t *spa, uint64_t txg,
486 487 const blkptr_t *bp, enum zio_flag flags);
487 488
488 489 extern int zio_alloc_zil(spa_t *spa, uint64_t txg, blkptr_t *new_bp,
489 490 blkptr_t *old_bp, uint64_t size, boolean_t use_slog);
490 491 extern void zio_free_zil(spa_t *spa, uint64_t txg, blkptr_t *bp);
491 492 extern void zio_flush(zio_t *zio, vdev_t *vd);
492 493 extern void zio_shrink(zio_t *zio, uint64_t size);
493 494
494 495 extern int zio_wait(zio_t *zio);
495 496 extern void zio_nowait(zio_t *zio);
496 497 extern void zio_execute(zio_t *zio);
497 498 extern void zio_interrupt(zio_t *zio);
498 499
499 500 extern zio_t *zio_walk_parents(zio_t *cio);
500 501 extern zio_t *zio_walk_children(zio_t *pio);
501 502 extern zio_t *zio_unique_parent(zio_t *cio);
502 503 extern void zio_add_child(zio_t *pio, zio_t *cio);
503 504
504 505 extern void *zio_buf_alloc(size_t size);
505 506 extern void zio_buf_free(void *buf, size_t size);
506 507 extern void *zio_data_buf_alloc(size_t size);
507 508 extern void zio_data_buf_free(void *buf, size_t size);
508 509
509 510 extern void zio_resubmit_stage_async(void *);
510 511
511 512 extern zio_t *zio_vdev_child_io(zio_t *zio, blkptr_t *bp, vdev_t *vd,
512 513 uint64_t offset, void *data, uint64_t size, int type, int priority,
513 514 enum zio_flag flags, zio_done_func_t *done, void *private);
514 515
515 516 extern zio_t *zio_vdev_delegated_io(vdev_t *vd, uint64_t offset,
516 517 void *data, uint64_t size, int type, int priority,
517 518 enum zio_flag flags, zio_done_func_t *done, void *private);
518 519
519 520 extern void zio_vdev_io_bypass(zio_t *zio);
520 521 extern void zio_vdev_io_reissue(zio_t *zio);
521 522 extern void zio_vdev_io_redone(zio_t *zio);
522 523
523 524 extern void zio_checksum_verified(zio_t *zio);
524 525 extern int zio_worst_error(int e1, int e2);
525 526
526 527 extern enum zio_checksum zio_checksum_select(enum zio_checksum child,
527 528 enum zio_checksum parent);
528 529 extern enum zio_checksum zio_checksum_dedup_select(spa_t *spa,
529 530 enum zio_checksum child, enum zio_checksum parent);
530 531 extern enum zio_compress zio_compress_select(enum zio_compress child,
531 532 enum zio_compress parent);
532 533
533 534 extern void zio_suspend(spa_t *spa, zio_t *zio);
534 535 extern int zio_resume(spa_t *spa);
535 536 extern void zio_resume_wait(spa_t *spa);
536 537
537 538 /*
538 539 * Initial setup and teardown.
539 540 */
540 541 extern void zio_init(void);
541 542 extern void zio_fini(void);
542 543
543 544 /*
544 545 * Fault injection
545 546 */
546 547 struct zinject_record;
547 548 extern uint32_t zio_injection_enabled;
548 549 extern int zio_inject_fault(char *name, int flags, int *id,
549 550 struct zinject_record *record);
550 551 extern int zio_inject_list_next(int *id, char *name, size_t buflen,
551 552 struct zinject_record *record);
552 553 extern int zio_clear_fault(int id);
553 554 extern void zio_handle_panic_injection(spa_t *spa, char *tag, uint64_t type);
554 555 extern int zio_handle_fault_injection(zio_t *zio, int error);
555 556 extern int zio_handle_device_injection(vdev_t *vd, zio_t *zio, int error);
556 557 extern int zio_handle_label_injection(zio_t *zio, int error);
557 558 extern void zio_handle_ignored_writes(zio_t *zio);
558 559 extern uint64_t zio_handle_io_delay(zio_t *zio);
559 560
560 561 /*
561 562 * Checksum ereport functions
562 563 */
563 564 extern void zfs_ereport_start_checksum(spa_t *spa, vdev_t *vd, struct zio *zio,
564 565 uint64_t offset, uint64_t length, void *arg, struct zio_bad_cksum *info);
565 566 extern void zfs_ereport_finish_checksum(zio_cksum_report_t *report,
566 567 const void *good_data, const void *bad_data, boolean_t drop_if_identical);
567 568
568 569 extern void zfs_ereport_send_interim_checksum(zio_cksum_report_t *report);
569 570 extern void zfs_ereport_free_checksum(zio_cksum_report_t *report);
570 571
571 572 /* If we have the good data in hand, this function can be used */
572 573 extern void zfs_ereport_post_checksum(spa_t *spa, vdev_t *vd,
573 574 struct zio *zio, uint64_t offset, uint64_t length,
574 575 const void *good_data, const void *bad_data, struct zio_bad_cksum *info);
575 576
576 577 /* Called from spa_sync(), but primarily an injection handler */
577 578 extern void spa_handle_ignored_writes(spa_t *spa);
578 579
579 580 /* zbookmark functions */
580 581 boolean_t zbookmark_is_before(const struct dnode_phys *dnp,
581 582 const zbookmark_t *zb1, const zbookmark_t *zb2);
582 583
583 584 #ifdef __cplusplus
584 585 }
585 586 #endif
586 587
587 588 #endif /* _ZIO_H */
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