Print this page
%B
| Split |
Close |
| Expand all |
| Collapse all |
--- 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
|
↓ open down ↓ |
15 lines elided |
↑ open up ↑ |
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 + * Copyright (c) 2013 by Saso Kiselkov. All rights reserved.
26 27 */
27 28
28 29 #ifndef _ZIO_H
29 30 #define _ZIO_H
30 31
31 32 #include <sys/zfs_context.h>
32 33 #include <sys/spa.h>
33 34 #include <sys/txg.h>
34 35 #include <sys/avl.h>
35 36 #include <sys/fs/zfs.h>
36 37 #include <sys/zio_impl.h>
37 38
38 39 #ifdef __cplusplus
39 40 extern "C" {
40 41 #endif
41 42
42 43 /*
43 44 * Embedded checksum
44 45 */
45 46 #define ZEC_MAGIC 0x210da7ab10c7a11ULL
46 47
47 48 typedef struct zio_eck {
48 49 uint64_t zec_magic; /* for validation, endianness */
49 50 zio_cksum_t zec_cksum; /* 256-bit checksum */
50 51 } zio_eck_t;
51 52
52 53 /*
53 54 * Gang block headers are self-checksumming and contain an array
54 55 * of block pointers.
55 56 */
56 57 #define SPA_GANGBLOCKSIZE SPA_MINBLOCKSIZE
57 58 #define SPA_GBH_NBLKPTRS ((SPA_GANGBLOCKSIZE - \
58 59 sizeof (zio_eck_t)) / sizeof (blkptr_t))
59 60 #define SPA_GBH_FILLER ((SPA_GANGBLOCKSIZE - \
60 61 sizeof (zio_eck_t) - \
61 62 (SPA_GBH_NBLKPTRS * sizeof (blkptr_t))) /\
62 63 sizeof (uint64_t))
63 64
64 65 typedef struct zio_gbh {
65 66 blkptr_t zg_blkptr[SPA_GBH_NBLKPTRS];
66 67 uint64_t zg_filler[SPA_GBH_FILLER];
67 68 zio_eck_t zg_tail;
68 69 } zio_gbh_phys_t;
69 70
70 71 enum zio_checksum {
71 72 ZIO_CHECKSUM_INHERIT = 0,
72 73 ZIO_CHECKSUM_ON,
73 74 ZIO_CHECKSUM_OFF,
74 75 ZIO_CHECKSUM_LABEL,
75 76 ZIO_CHECKSUM_GANG_HEADER,
76 77 ZIO_CHECKSUM_ZILOG,
77 78 ZIO_CHECKSUM_FLETCHER_2,
78 79 ZIO_CHECKSUM_FLETCHER_4,
79 80 ZIO_CHECKSUM_SHA256,
80 81 ZIO_CHECKSUM_ZILOG2,
81 82 ZIO_CHECKSUM_FUNCTIONS
82 83 };
83 84
84 85 #define ZIO_CHECKSUM_ON_VALUE ZIO_CHECKSUM_FLETCHER_4
85 86 #define ZIO_CHECKSUM_DEFAULT ZIO_CHECKSUM_ON
86 87
87 88 #define ZIO_CHECKSUM_MASK 0xffULL
88 89 #define ZIO_CHECKSUM_VERIFY (1 << 8)
89 90
90 91 #define ZIO_DEDUPCHECKSUM ZIO_CHECKSUM_SHA256
91 92 #define ZIO_DEDUPDITTO_MIN 100
92 93
93 94 enum zio_compress {
94 95 ZIO_COMPRESS_INHERIT = 0,
95 96 ZIO_COMPRESS_ON,
96 97 ZIO_COMPRESS_OFF,
97 98 ZIO_COMPRESS_LZJB,
98 99 ZIO_COMPRESS_EMPTY,
|
↓ open down ↓ |
63 lines elided |
↑ open up ↑ |
99 100 ZIO_COMPRESS_GZIP_1,
100 101 ZIO_COMPRESS_GZIP_2,
101 102 ZIO_COMPRESS_GZIP_3,
102 103 ZIO_COMPRESS_GZIP_4,
103 104 ZIO_COMPRESS_GZIP_5,
104 105 ZIO_COMPRESS_GZIP_6,
105 106 ZIO_COMPRESS_GZIP_7,
106 107 ZIO_COMPRESS_GZIP_8,
107 108 ZIO_COMPRESS_GZIP_9,
108 109 ZIO_COMPRESS_ZLE,
110 + ZIO_COMPRESS_LZ4,
111 + ZIO_COMPRESS_LZ4HC,
109 112 ZIO_COMPRESS_FUNCTIONS
110 113 };
111 114
115 +/* N.B. when altering this value, also change BOOTFS_COMPRESS_VALID below */
112 116 #define ZIO_COMPRESS_ON_VALUE ZIO_COMPRESS_LZJB
113 117 #define ZIO_COMPRESS_DEFAULT ZIO_COMPRESS_OFF
114 118
115 119 #define BOOTFS_COMPRESS_VALID(compress) \
116 120 ((compress) == ZIO_COMPRESS_LZJB || \
121 + (compress) == ZIO_COMPRESS_LZ4HC || \
122 + (compress) == ZIO_COMPRESS_LZ4 || \
117 123 ((compress) == ZIO_COMPRESS_ON && \
118 124 ZIO_COMPRESS_ON_VALUE == ZIO_COMPRESS_LZJB) || \
119 125 (compress) == ZIO_COMPRESS_OFF)
120 126
121 127 #define ZIO_FAILURE_MODE_WAIT 0
122 128 #define ZIO_FAILURE_MODE_CONTINUE 1
123 129 #define ZIO_FAILURE_MODE_PANIC 2
124 130
125 131 #define ZIO_PRIORITY_NOW (zio_priority_table[0])
126 132 #define ZIO_PRIORITY_SYNC_READ (zio_priority_table[1])
127 133 #define ZIO_PRIORITY_SYNC_WRITE (zio_priority_table[2])
128 134 #define ZIO_PRIORITY_LOG_WRITE (zio_priority_table[3])
129 135 #define ZIO_PRIORITY_CACHE_FILL (zio_priority_table[4])
130 136 #define ZIO_PRIORITY_AGG (zio_priority_table[5])
131 137 #define ZIO_PRIORITY_FREE (zio_priority_table[6])
132 138 #define ZIO_PRIORITY_ASYNC_WRITE (zio_priority_table[7])
133 139 #define ZIO_PRIORITY_ASYNC_READ (zio_priority_table[8])
134 140 #define ZIO_PRIORITY_RESILVER (zio_priority_table[9])
135 141 #define ZIO_PRIORITY_SCRUB (zio_priority_table[10])
136 142 #define ZIO_PRIORITY_DDT_PREFETCH (zio_priority_table[11])
137 143 #define ZIO_PRIORITY_TABLE_SIZE 12
138 144
139 145 #define ZIO_PIPELINE_CONTINUE 0x100
140 146 #define ZIO_PIPELINE_STOP 0x101
141 147
142 148 enum zio_flag {
143 149 /*
144 150 * Flags inherited by gang, ddt, and vdev children,
145 151 * and that must be equal for two zios to aggregate
146 152 */
147 153 ZIO_FLAG_DONT_AGGREGATE = 1 << 0,
148 154 ZIO_FLAG_IO_REPAIR = 1 << 1,
149 155 ZIO_FLAG_SELF_HEAL = 1 << 2,
150 156 ZIO_FLAG_RESILVER = 1 << 3,
151 157 ZIO_FLAG_SCRUB = 1 << 4,
152 158 ZIO_FLAG_SCAN_THREAD = 1 << 5,
153 159
154 160 #define ZIO_FLAG_AGG_INHERIT (ZIO_FLAG_CANFAIL - 1)
155 161
156 162 /*
157 163 * Flags inherited by ddt, gang, and vdev children.
158 164 */
159 165 ZIO_FLAG_CANFAIL = 1 << 6, /* must be first for INHERIT */
160 166 ZIO_FLAG_SPECULATIVE = 1 << 7,
161 167 ZIO_FLAG_CONFIG_WRITER = 1 << 8,
162 168 ZIO_FLAG_DONT_RETRY = 1 << 9,
163 169 ZIO_FLAG_DONT_CACHE = 1 << 10,
164 170 ZIO_FLAG_NODATA = 1 << 11,
165 171 ZIO_FLAG_INDUCE_DAMAGE = 1 << 12,
166 172
167 173 #define ZIO_FLAG_DDT_INHERIT (ZIO_FLAG_IO_RETRY - 1)
168 174 #define ZIO_FLAG_GANG_INHERIT (ZIO_FLAG_IO_RETRY - 1)
169 175
170 176 /*
171 177 * Flags inherited by vdev children.
172 178 */
173 179 ZIO_FLAG_IO_RETRY = 1 << 13, /* must be first for INHERIT */
174 180 ZIO_FLAG_PROBE = 1 << 14,
175 181 ZIO_FLAG_TRYHARD = 1 << 15,
176 182 ZIO_FLAG_OPTIONAL = 1 << 16,
177 183
178 184 #define ZIO_FLAG_VDEV_INHERIT (ZIO_FLAG_DONT_QUEUE - 1)
179 185
180 186 /*
181 187 * Flags not inherited by any children.
182 188 */
183 189 ZIO_FLAG_DONT_QUEUE = 1 << 17, /* must be first for INHERIT */
184 190 ZIO_FLAG_DONT_PROPAGATE = 1 << 18,
185 191 ZIO_FLAG_IO_BYPASS = 1 << 19,
186 192 ZIO_FLAG_IO_REWRITE = 1 << 20,
187 193 ZIO_FLAG_RAW = 1 << 21,
188 194 ZIO_FLAG_GANG_CHILD = 1 << 22,
189 195 ZIO_FLAG_DDT_CHILD = 1 << 23,
190 196 ZIO_FLAG_GODFATHER = 1 << 24,
191 197 ZIO_FLAG_NOPWRITE = 1 << 25,
192 198 ZIO_FLAG_REEXECUTED = 1 << 26,
193 199 };
194 200
195 201 #define ZIO_FLAG_MUSTSUCCEED 0
196 202
197 203 #define ZIO_DDT_CHILD_FLAGS(zio) \
198 204 (((zio)->io_flags & ZIO_FLAG_DDT_INHERIT) | \
199 205 ZIO_FLAG_DDT_CHILD | ZIO_FLAG_CANFAIL)
200 206
201 207 #define ZIO_GANG_CHILD_FLAGS(zio) \
202 208 (((zio)->io_flags & ZIO_FLAG_GANG_INHERIT) | \
203 209 ZIO_FLAG_GANG_CHILD | ZIO_FLAG_CANFAIL)
204 210
205 211 #define ZIO_VDEV_CHILD_FLAGS(zio) \
206 212 (((zio)->io_flags & ZIO_FLAG_VDEV_INHERIT) | \
207 213 ZIO_FLAG_CANFAIL)
208 214
209 215 enum zio_child {
210 216 ZIO_CHILD_VDEV = 0,
211 217 ZIO_CHILD_GANG,
212 218 ZIO_CHILD_DDT,
213 219 ZIO_CHILD_LOGICAL,
214 220 ZIO_CHILD_TYPES
215 221 };
216 222
217 223 enum zio_wait_type {
218 224 ZIO_WAIT_READY = 0,
219 225 ZIO_WAIT_DONE,
220 226 ZIO_WAIT_TYPES
221 227 };
222 228
223 229 /*
224 230 * We'll take the unused errnos, 'EBADE' and 'EBADR' (from the Convergent
225 231 * graveyard) to indicate checksum errors and fragmentation.
226 232 */
227 233 #define ECKSUM EBADE
228 234 #define EFRAGS EBADR
229 235
230 236 typedef void zio_done_func_t(zio_t *zio);
231 237
232 238 extern uint8_t zio_priority_table[ZIO_PRIORITY_TABLE_SIZE];
233 239 extern char *zio_type_name[ZIO_TYPES];
234 240
235 241 /*
236 242 * A bookmark is a four-tuple <objset, object, level, blkid> that uniquely
237 243 * identifies any block in the pool. By convention, the meta-objset (MOS)
238 244 * is objset 0, and the meta-dnode is object 0. This covers all blocks
239 245 * except root blocks and ZIL blocks, which are defined as follows:
240 246 *
241 247 * Root blocks (objset_phys_t) are object 0, level -1: <objset, 0, -1, 0>.
242 248 * ZIL blocks are bookmarked <objset, 0, -2, blkid == ZIL sequence number>.
243 249 * dmu_sync()ed ZIL data blocks are bookmarked <objset, object, -2, blkid>.
244 250 *
245 251 * Note: this structure is called a bookmark because its original purpose
246 252 * was to remember where to resume a pool-wide traverse.
247 253 *
248 254 * Note: this structure is passed between userland and the kernel.
249 255 * Therefore it must not change size or alignment between 32/64 bit
250 256 * compilation options.
251 257 */
252 258 typedef struct zbookmark {
253 259 uint64_t zb_objset;
254 260 uint64_t zb_object;
255 261 int64_t zb_level;
256 262 uint64_t zb_blkid;
257 263 } zbookmark_t;
258 264
259 265 #define SET_BOOKMARK(zb, objset, object, level, blkid) \
260 266 { \
261 267 (zb)->zb_objset = objset; \
262 268 (zb)->zb_object = object; \
263 269 (zb)->zb_level = level; \
264 270 (zb)->zb_blkid = blkid; \
265 271 }
266 272
267 273 #define ZB_DESTROYED_OBJSET (-1ULL)
268 274
269 275 #define ZB_ROOT_OBJECT (0ULL)
270 276 #define ZB_ROOT_LEVEL (-1LL)
271 277 #define ZB_ROOT_BLKID (0ULL)
272 278
273 279 #define ZB_ZIL_OBJECT (0ULL)
274 280 #define ZB_ZIL_LEVEL (-2LL)
275 281
276 282 #define ZB_IS_ZERO(zb) \
277 283 ((zb)->zb_objset == 0 && (zb)->zb_object == 0 && \
278 284 (zb)->zb_level == 0 && (zb)->zb_blkid == 0)
279 285 #define ZB_IS_ROOT(zb) \
280 286 ((zb)->zb_object == ZB_ROOT_OBJECT && \
281 287 (zb)->zb_level == ZB_ROOT_LEVEL && \
282 288 (zb)->zb_blkid == ZB_ROOT_BLKID)
283 289
284 290 typedef struct zio_prop {
285 291 enum zio_checksum zp_checksum;
286 292 enum zio_compress zp_compress;
287 293 dmu_object_type_t zp_type;
288 294 uint8_t zp_level;
289 295 uint8_t zp_copies;
290 296 boolean_t zp_dedup;
291 297 boolean_t zp_dedup_verify;
292 298 boolean_t zp_nopwrite;
293 299 } zio_prop_t;
294 300
295 301 typedef struct zio_cksum_report zio_cksum_report_t;
296 302
297 303 typedef void zio_cksum_finish_f(zio_cksum_report_t *rep,
298 304 const void *good_data);
299 305 typedef void zio_cksum_free_f(void *cbdata, size_t size);
300 306
301 307 struct zio_bad_cksum; /* defined in zio_checksum.h */
302 308 struct dnode_phys;
303 309
304 310 struct zio_cksum_report {
305 311 struct zio_cksum_report *zcr_next;
306 312 nvlist_t *zcr_ereport;
307 313 nvlist_t *zcr_detector;
308 314 void *zcr_cbdata;
309 315 size_t zcr_cbinfo; /* passed to zcr_free() */
310 316 uint64_t zcr_align;
311 317 uint64_t zcr_length;
312 318 zio_cksum_finish_f *zcr_finish;
313 319 zio_cksum_free_f *zcr_free;
314 320
315 321 /* internal use only */
316 322 struct zio_bad_cksum *zcr_ckinfo; /* information from failure */
317 323 };
318 324
319 325 typedef void zio_vsd_cksum_report_f(zio_t *zio, zio_cksum_report_t *zcr,
320 326 void *arg);
321 327
322 328 zio_vsd_cksum_report_f zio_vsd_default_cksum_report;
323 329
324 330 typedef struct zio_vsd_ops {
325 331 zio_done_func_t *vsd_free;
326 332 zio_vsd_cksum_report_f *vsd_cksum_report;
327 333 } zio_vsd_ops_t;
328 334
329 335 typedef struct zio_gang_node {
330 336 zio_gbh_phys_t *gn_gbh;
331 337 struct zio_gang_node *gn_child[SPA_GBH_NBLKPTRS];
332 338 } zio_gang_node_t;
333 339
334 340 typedef zio_t *zio_gang_issue_func_t(zio_t *zio, blkptr_t *bp,
335 341 zio_gang_node_t *gn, void *data);
336 342
337 343 typedef void zio_transform_func_t(zio_t *zio, void *data, uint64_t size);
338 344
339 345 typedef struct zio_transform {
340 346 void *zt_orig_data;
341 347 uint64_t zt_orig_size;
342 348 uint64_t zt_bufsize;
343 349 zio_transform_func_t *zt_transform;
344 350 struct zio_transform *zt_next;
345 351 } zio_transform_t;
346 352
347 353 typedef int zio_pipe_stage_t(zio_t *zio);
348 354
349 355 /*
350 356 * The io_reexecute flags are distinct from io_flags because the child must
351 357 * be able to propagate them to the parent. The normal io_flags are local
352 358 * to the zio, not protected by any lock, and not modifiable by children;
353 359 * the reexecute flags are protected by io_lock, modifiable by children,
354 360 * and always propagated -- even when ZIO_FLAG_DONT_PROPAGATE is set.
355 361 */
356 362 #define ZIO_REEXECUTE_NOW 0x01
357 363 #define ZIO_REEXECUTE_SUSPEND 0x02
358 364
359 365 typedef struct zio_link {
360 366 zio_t *zl_parent;
361 367 zio_t *zl_child;
362 368 list_node_t zl_parent_node;
363 369 list_node_t zl_child_node;
364 370 } zio_link_t;
365 371
366 372 struct zio {
367 373 /* Core information about this I/O */
368 374 zbookmark_t io_bookmark;
369 375 zio_prop_t io_prop;
370 376 zio_type_t io_type;
371 377 enum zio_child io_child_type;
372 378 int io_cmd;
373 379 uint8_t io_priority;
374 380 uint8_t io_reexecute;
375 381 uint8_t io_state[ZIO_WAIT_TYPES];
376 382 uint64_t io_txg;
377 383 spa_t *io_spa;
378 384 blkptr_t *io_bp;
379 385 blkptr_t *io_bp_override;
380 386 blkptr_t io_bp_copy;
381 387 list_t io_parent_list;
382 388 list_t io_child_list;
383 389 zio_link_t *io_walk_link;
384 390 zio_t *io_logical;
385 391 zio_transform_t *io_transform_stack;
386 392
387 393 /* Callback info */
388 394 zio_done_func_t *io_ready;
389 395 zio_done_func_t *io_done;
390 396 void *io_private;
391 397 int64_t io_prev_space_delta; /* DMU private */
392 398 blkptr_t io_bp_orig;
393 399
394 400 /* Data represented by this I/O */
395 401 void *io_data;
396 402 void *io_orig_data;
397 403 uint64_t io_size;
398 404 uint64_t io_orig_size;
399 405
400 406 /* Stuff for the vdev stack */
401 407 vdev_t *io_vd;
402 408 void *io_vsd;
403 409 const zio_vsd_ops_t *io_vsd_ops;
404 410
405 411 uint64_t io_offset;
406 412 uint64_t io_deadline;
407 413 uint64_t io_timestamp;
408 414 avl_node_t io_offset_node;
409 415 avl_node_t io_deadline_node;
410 416 avl_tree_t *io_vdev_tree;
411 417
412 418 /* Internal pipeline state */
413 419 enum zio_flag io_flags;
414 420 enum zio_stage io_stage;
415 421 enum zio_stage io_pipeline;
416 422 enum zio_flag io_orig_flags;
417 423 enum zio_stage io_orig_stage;
418 424 enum zio_stage io_orig_pipeline;
419 425 int io_error;
420 426 int io_child_error[ZIO_CHILD_TYPES];
421 427 uint64_t io_children[ZIO_CHILD_TYPES][ZIO_WAIT_TYPES];
422 428 uint64_t io_child_count;
423 429 uint64_t io_parent_count;
424 430 uint64_t *io_stall;
425 431 zio_t *io_gang_leader;
426 432 zio_gang_node_t *io_gang_tree;
427 433 void *io_executor;
428 434 void *io_waiter;
429 435 kmutex_t io_lock;
430 436 kcondvar_t io_cv;
431 437
432 438 /* FMA state */
433 439 zio_cksum_report_t *io_cksum_report;
434 440 uint64_t io_ena;
435 441
436 442 /* Taskq dispatching state */
437 443 taskq_ent_t io_tqent;
438 444 };
439 445
440 446 extern zio_t *zio_null(zio_t *pio, spa_t *spa, vdev_t *vd,
441 447 zio_done_func_t *done, void *private, enum zio_flag flags);
442 448
443 449 extern zio_t *zio_root(spa_t *spa,
444 450 zio_done_func_t *done, void *private, enum zio_flag flags);
445 451
446 452 extern zio_t *zio_read(zio_t *pio, spa_t *spa, const blkptr_t *bp, void *data,
447 453 uint64_t size, zio_done_func_t *done, void *private,
448 454 int priority, enum zio_flag flags, const zbookmark_t *zb);
449 455
450 456 extern zio_t *zio_write(zio_t *pio, spa_t *spa, uint64_t txg, blkptr_t *bp,
451 457 void *data, uint64_t size, const zio_prop_t *zp,
452 458 zio_done_func_t *ready, zio_done_func_t *done, void *private,
453 459 int priority, enum zio_flag flags, const zbookmark_t *zb);
454 460
455 461 extern zio_t *zio_rewrite(zio_t *pio, spa_t *spa, uint64_t txg, blkptr_t *bp,
456 462 void *data, uint64_t size, zio_done_func_t *done, void *private,
457 463 int priority, enum zio_flag flags, zbookmark_t *zb);
458 464
459 465 extern void zio_write_override(zio_t *zio, blkptr_t *bp, int copies,
460 466 boolean_t nopwrite);
461 467
462 468 extern void zio_free(spa_t *spa, uint64_t txg, const blkptr_t *bp);
463 469
464 470 extern zio_t *zio_claim(zio_t *pio, spa_t *spa, uint64_t txg,
465 471 const blkptr_t *bp,
466 472 zio_done_func_t *done, void *private, enum zio_flag flags);
467 473
468 474 extern zio_t *zio_ioctl(zio_t *pio, spa_t *spa, vdev_t *vd, int cmd,
469 475 zio_done_func_t *done, void *private, int priority, enum zio_flag flags);
470 476
471 477 extern zio_t *zio_read_phys(zio_t *pio, vdev_t *vd, uint64_t offset,
472 478 uint64_t size, void *data, int checksum,
473 479 zio_done_func_t *done, void *private, int priority, enum zio_flag flags,
474 480 boolean_t labels);
475 481
476 482 extern zio_t *zio_write_phys(zio_t *pio, vdev_t *vd, uint64_t offset,
477 483 uint64_t size, void *data, int checksum,
478 484 zio_done_func_t *done, void *private, int priority, enum zio_flag flags,
479 485 boolean_t labels);
480 486
481 487 extern zio_t *zio_free_sync(zio_t *pio, spa_t *spa, uint64_t txg,
482 488 const blkptr_t *bp, enum zio_flag flags);
483 489
484 490 extern int zio_alloc_zil(spa_t *spa, uint64_t txg, blkptr_t *new_bp,
485 491 blkptr_t *old_bp, uint64_t size, boolean_t use_slog);
486 492 extern void zio_free_zil(spa_t *spa, uint64_t txg, blkptr_t *bp);
487 493 extern void zio_flush(zio_t *zio, vdev_t *vd);
488 494 extern void zio_shrink(zio_t *zio, uint64_t size);
489 495
490 496 extern int zio_wait(zio_t *zio);
491 497 extern void zio_nowait(zio_t *zio);
492 498 extern void zio_execute(zio_t *zio);
493 499 extern void zio_interrupt(zio_t *zio);
494 500
495 501 extern zio_t *zio_walk_parents(zio_t *cio);
496 502 extern zio_t *zio_walk_children(zio_t *pio);
497 503 extern zio_t *zio_unique_parent(zio_t *cio);
498 504 extern void zio_add_child(zio_t *pio, zio_t *cio);
499 505
500 506 extern void *zio_buf_alloc(size_t size);
501 507 extern void zio_buf_free(void *buf, size_t size);
502 508 extern void *zio_data_buf_alloc(size_t size);
503 509 extern void zio_data_buf_free(void *buf, size_t size);
504 510
505 511 extern void zio_resubmit_stage_async(void *);
506 512
507 513 extern zio_t *zio_vdev_child_io(zio_t *zio, blkptr_t *bp, vdev_t *vd,
508 514 uint64_t offset, void *data, uint64_t size, int type, int priority,
509 515 enum zio_flag flags, zio_done_func_t *done, void *private);
510 516
511 517 extern zio_t *zio_vdev_delegated_io(vdev_t *vd, uint64_t offset,
512 518 void *data, uint64_t size, int type, int priority,
513 519 enum zio_flag flags, zio_done_func_t *done, void *private);
514 520
515 521 extern void zio_vdev_io_bypass(zio_t *zio);
516 522 extern void zio_vdev_io_reissue(zio_t *zio);
517 523 extern void zio_vdev_io_redone(zio_t *zio);
518 524
519 525 extern void zio_checksum_verified(zio_t *zio);
520 526 extern int zio_worst_error(int e1, int e2);
521 527
522 528 extern enum zio_checksum zio_checksum_select(enum zio_checksum child,
523 529 enum zio_checksum parent);
524 530 extern enum zio_checksum zio_checksum_dedup_select(spa_t *spa,
525 531 enum zio_checksum child, enum zio_checksum parent);
526 532 extern enum zio_compress zio_compress_select(enum zio_compress child,
527 533 enum zio_compress parent);
528 534
529 535 extern void zio_suspend(spa_t *spa, zio_t *zio);
530 536 extern int zio_resume(spa_t *spa);
531 537 extern void zio_resume_wait(spa_t *spa);
532 538
533 539 /*
534 540 * Initial setup and teardown.
535 541 */
536 542 extern void zio_init(void);
537 543 extern void zio_fini(void);
538 544
539 545 /*
540 546 * Fault injection
541 547 */
542 548 struct zinject_record;
543 549 extern uint32_t zio_injection_enabled;
544 550 extern int zio_inject_fault(char *name, int flags, int *id,
545 551 struct zinject_record *record);
546 552 extern int zio_inject_list_next(int *id, char *name, size_t buflen,
547 553 struct zinject_record *record);
548 554 extern int zio_clear_fault(int id);
549 555 extern void zio_handle_panic_injection(spa_t *spa, char *tag, uint64_t type);
550 556 extern int zio_handle_fault_injection(zio_t *zio, int error);
551 557 extern int zio_handle_device_injection(vdev_t *vd, zio_t *zio, int error);
552 558 extern int zio_handle_label_injection(zio_t *zio, int error);
553 559 extern void zio_handle_ignored_writes(zio_t *zio);
554 560 extern uint64_t zio_handle_io_delay(zio_t *zio);
555 561
556 562 /*
557 563 * Checksum ereport functions
558 564 */
559 565 extern void zfs_ereport_start_checksum(spa_t *spa, vdev_t *vd, struct zio *zio,
560 566 uint64_t offset, uint64_t length, void *arg, struct zio_bad_cksum *info);
561 567 extern void zfs_ereport_finish_checksum(zio_cksum_report_t *report,
562 568 const void *good_data, const void *bad_data, boolean_t drop_if_identical);
563 569
564 570 extern void zfs_ereport_send_interim_checksum(zio_cksum_report_t *report);
565 571 extern void zfs_ereport_free_checksum(zio_cksum_report_t *report);
566 572
567 573 /* If we have the good data in hand, this function can be used */
568 574 extern void zfs_ereport_post_checksum(spa_t *spa, vdev_t *vd,
569 575 struct zio *zio, uint64_t offset, uint64_t length,
570 576 const void *good_data, const void *bad_data, struct zio_bad_cksum *info);
571 577
572 578 /* Called from spa_sync(), but primarily an injection handler */
573 579 extern void spa_handle_ignored_writes(spa_t *spa);
574 580
575 581 /* zbookmark functions */
576 582 boolean_t zbookmark_is_before(const struct dnode_phys *dnp,
577 583 const zbookmark_t *zb1, const zbookmark_t *zb2);
578 584
579 585 #ifdef __cplusplus
580 586 }
581 587 #endif
582 588
583 589 #endif /* _ZIO_H */
|
↓ open down ↓ |
457 lines elided |
↑ open up ↑ |
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX