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34dc7c2f BB |
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 http://www.opensolaris.org/os/licensing. | |
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 | /* | |
428870ff | 23 | * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. |
a38718a6 | 24 | * Copyright 2011 Nexenta Systems, Inc. All rights reserved. |
5dbd68a3 | 25 | * Copyright (c) 2012, 2014 by Delphix. All rights reserved. |
9759c60f | 26 | * Copyright (c) 2013 by Saso Kiselkov. All rights reserved. |
a38718a6 | 27 | */ |
34dc7c2f BB |
28 | |
29 | #ifndef _ZIO_H | |
30 | #define _ZIO_H | |
31 | ||
34dc7c2f BB |
32 | #include <sys/zfs_context.h> |
33 | #include <sys/spa.h> | |
34 | #include <sys/txg.h> | |
35 | #include <sys/avl.h> | |
34dc7c2f BB |
36 | #include <sys/fs/zfs.h> |
37 | #include <sys/zio_impl.h> | |
38 | ||
39 | #ifdef __cplusplus | |
40 | extern "C" { | |
41 | #endif | |
42 | ||
428870ff BB |
43 | /* |
44 | * Embedded checksum | |
45 | */ | |
46 | #define ZEC_MAGIC 0x210da7ab10c7a11ULL | |
34dc7c2f | 47 | |
428870ff BB |
48 | typedef struct zio_eck { |
49 | uint64_t zec_magic; /* for validation, endianness */ | |
50 | zio_cksum_t zec_cksum; /* 256-bit checksum */ | |
51 | } zio_eck_t; | |
34dc7c2f BB |
52 | |
53 | /* | |
54 | * Gang block headers are self-checksumming and contain an array | |
55 | * of block pointers. | |
56 | */ | |
57 | #define SPA_GANGBLOCKSIZE SPA_MINBLOCKSIZE | |
58 | #define SPA_GBH_NBLKPTRS ((SPA_GANGBLOCKSIZE - \ | |
428870ff | 59 | sizeof (zio_eck_t)) / sizeof (blkptr_t)) |
34dc7c2f | 60 | #define SPA_GBH_FILLER ((SPA_GANGBLOCKSIZE - \ |
428870ff | 61 | sizeof (zio_eck_t) - \ |
34dc7c2f BB |
62 | (SPA_GBH_NBLKPTRS * sizeof (blkptr_t))) /\ |
63 | sizeof (uint64_t)) | |
64 | ||
34dc7c2f BB |
65 | typedef struct zio_gbh { |
66 | blkptr_t zg_blkptr[SPA_GBH_NBLKPTRS]; | |
67 | uint64_t zg_filler[SPA_GBH_FILLER]; | |
428870ff | 68 | zio_eck_t zg_tail; |
34dc7c2f BB |
69 | } zio_gbh_phys_t; |
70 | ||
71 | enum zio_checksum { | |
72 | ZIO_CHECKSUM_INHERIT = 0, | |
73 | ZIO_CHECKSUM_ON, | |
74 | ZIO_CHECKSUM_OFF, | |
75 | ZIO_CHECKSUM_LABEL, | |
76 | ZIO_CHECKSUM_GANG_HEADER, | |
77 | ZIO_CHECKSUM_ZILOG, | |
78 | ZIO_CHECKSUM_FLETCHER_2, | |
79 | ZIO_CHECKSUM_FLETCHER_4, | |
80 | ZIO_CHECKSUM_SHA256, | |
428870ff | 81 | ZIO_CHECKSUM_ZILOG2, |
34dc7c2f BB |
82 | ZIO_CHECKSUM_FUNCTIONS |
83 | }; | |
84 | ||
9b67f605 MA |
85 | /* |
86 | * The number of "legacy" compression functions which can be set on individual | |
87 | * objects. | |
88 | */ | |
89 | #define ZIO_CHECKSUM_LEGACY_FUNCTIONS ZIO_CHECKSUM_ZILOG2 | |
90 | ||
9babb374 | 91 | #define ZIO_CHECKSUM_ON_VALUE ZIO_CHECKSUM_FLETCHER_4 |
34dc7c2f BB |
92 | #define ZIO_CHECKSUM_DEFAULT ZIO_CHECKSUM_ON |
93 | ||
428870ff BB |
94 | #define ZIO_CHECKSUM_MASK 0xffULL |
95 | #define ZIO_CHECKSUM_VERIFY (1 << 8) | |
96 | ||
97 | #define ZIO_DEDUPCHECKSUM ZIO_CHECKSUM_SHA256 | |
98 | #define ZIO_DEDUPDITTO_MIN 100 | |
99 | ||
34dc7c2f BB |
100 | enum zio_compress { |
101 | ZIO_COMPRESS_INHERIT = 0, | |
102 | ZIO_COMPRESS_ON, | |
103 | ZIO_COMPRESS_OFF, | |
104 | ZIO_COMPRESS_LZJB, | |
105 | ZIO_COMPRESS_EMPTY, | |
106 | ZIO_COMPRESS_GZIP_1, | |
107 | ZIO_COMPRESS_GZIP_2, | |
108 | ZIO_COMPRESS_GZIP_3, | |
109 | ZIO_COMPRESS_GZIP_4, | |
110 | ZIO_COMPRESS_GZIP_5, | |
111 | ZIO_COMPRESS_GZIP_6, | |
112 | ZIO_COMPRESS_GZIP_7, | |
113 | ZIO_COMPRESS_GZIP_8, | |
114 | ZIO_COMPRESS_GZIP_9, | |
428870ff | 115 | ZIO_COMPRESS_ZLE, |
9759c60f | 116 | ZIO_COMPRESS_LZ4, |
34dc7c2f BB |
117 | ZIO_COMPRESS_FUNCTIONS |
118 | }; | |
119 | ||
9b67f605 MA |
120 | /* |
121 | * The number of "legacy" compression functions which can be set on individual | |
122 | * objects. | |
123 | */ | |
124 | #define ZIO_COMPRESS_LEGACY_FUNCTIONS ZIO_COMPRESS_LZ4 | |
125 | ||
34dc7c2f BB |
126 | #define ZIO_COMPRESS_ON_VALUE ZIO_COMPRESS_LZJB |
127 | #define ZIO_COMPRESS_DEFAULT ZIO_COMPRESS_OFF | |
128 | ||
428870ff BB |
129 | #define BOOTFS_COMPRESS_VALID(compress) \ |
130 | ((compress) == ZIO_COMPRESS_LZJB || \ | |
9759c60f | 131 | (compress) == ZIO_COMPRESS_LZ4 || \ |
428870ff BB |
132 | ((compress) == ZIO_COMPRESS_ON && \ |
133 | ZIO_COMPRESS_ON_VALUE == ZIO_COMPRESS_LZJB) || \ | |
134 | (compress) == ZIO_COMPRESS_OFF) | |
135 | ||
a69052be BB |
136 | /* |
137 | * Default Linux timeout for a sd device. | |
138 | */ | |
d1d7e268 | 139 | #define ZIO_DELAY_MAX (30 * MILLISEC) |
a69052be | 140 | |
34dc7c2f BB |
141 | #define ZIO_FAILURE_MODE_WAIT 0 |
142 | #define ZIO_FAILURE_MODE_CONTINUE 1 | |
143 | #define ZIO_FAILURE_MODE_PANIC 2 | |
144 | ||
e8b96c60 MA |
145 | typedef enum zio_priority { |
146 | ZIO_PRIORITY_SYNC_READ, | |
147 | ZIO_PRIORITY_SYNC_WRITE, /* ZIL */ | |
148 | ZIO_PRIORITY_ASYNC_READ, /* prefetch */ | |
149 | ZIO_PRIORITY_ASYNC_WRITE, /* spa_sync() */ | |
150 | ZIO_PRIORITY_SCRUB, /* asynchronous scrub/resilver reads */ | |
151 | ZIO_PRIORITY_NUM_QUEUEABLE, | |
152 | ||
153 | ZIO_PRIORITY_NOW /* non-queued i/os (e.g. free) */ | |
154 | } zio_priority_t; | |
fb5f0bc8 | 155 | |
34dc7c2f BB |
156 | #define ZIO_PIPELINE_CONTINUE 0x100 |
157 | #define ZIO_PIPELINE_STOP 0x101 | |
158 | ||
428870ff BB |
159 | enum zio_flag { |
160 | /* | |
161 | * Flags inherited by gang, ddt, and vdev children, | |
162 | * and that must be equal for two zios to aggregate | |
163 | */ | |
164 | ZIO_FLAG_DONT_AGGREGATE = 1 << 0, | |
165 | ZIO_FLAG_IO_REPAIR = 1 << 1, | |
166 | ZIO_FLAG_SELF_HEAL = 1 << 2, | |
167 | ZIO_FLAG_RESILVER = 1 << 3, | |
168 | ZIO_FLAG_SCRUB = 1 << 4, | |
572e2857 | 169 | ZIO_FLAG_SCAN_THREAD = 1 << 5, |
b02fe35d | 170 | ZIO_FLAG_PHYSICAL = 1 << 6, |
428870ff BB |
171 | |
172 | #define ZIO_FLAG_AGG_INHERIT (ZIO_FLAG_CANFAIL - 1) | |
173 | ||
174 | /* | |
175 | * Flags inherited by ddt, gang, and vdev children. | |
176 | */ | |
b02fe35d AR |
177 | ZIO_FLAG_CANFAIL = 1 << 7, /* must be first for INHERIT */ |
178 | ZIO_FLAG_SPECULATIVE = 1 << 8, | |
179 | ZIO_FLAG_CONFIG_WRITER = 1 << 9, | |
180 | ZIO_FLAG_DONT_RETRY = 1 << 10, | |
181 | ZIO_FLAG_DONT_CACHE = 1 << 11, | |
182 | ZIO_FLAG_NODATA = 1 << 12, | |
183 | ZIO_FLAG_INDUCE_DAMAGE = 1 << 13, | |
428870ff BB |
184 | |
185 | #define ZIO_FLAG_DDT_INHERIT (ZIO_FLAG_IO_RETRY - 1) | |
186 | #define ZIO_FLAG_GANG_INHERIT (ZIO_FLAG_IO_RETRY - 1) | |
187 | ||
188 | /* | |
189 | * Flags inherited by vdev children. | |
190 | */ | |
b02fe35d AR |
191 | ZIO_FLAG_IO_RETRY = 1 << 14, /* must be first for INHERIT */ |
192 | ZIO_FLAG_PROBE = 1 << 15, | |
193 | ZIO_FLAG_TRYHARD = 1 << 16, | |
194 | ZIO_FLAG_OPTIONAL = 1 << 17, | |
428870ff BB |
195 | |
196 | #define ZIO_FLAG_VDEV_INHERIT (ZIO_FLAG_DONT_QUEUE - 1) | |
197 | ||
198 | /* | |
199 | * Flags not inherited by any children. | |
200 | */ | |
b02fe35d AR |
201 | ZIO_FLAG_DONT_QUEUE = 1 << 18, /* must be first for INHERIT */ |
202 | ZIO_FLAG_DONT_PROPAGATE = 1 << 19, | |
203 | ZIO_FLAG_IO_BYPASS = 1 << 20, | |
204 | ZIO_FLAG_IO_REWRITE = 1 << 21, | |
205 | ZIO_FLAG_RAW = 1 << 22, | |
206 | ZIO_FLAG_GANG_CHILD = 1 << 23, | |
207 | ZIO_FLAG_DDT_CHILD = 1 << 24, | |
208 | ZIO_FLAG_GODFATHER = 1 << 25, | |
209 | ZIO_FLAG_NOPWRITE = 1 << 26, | |
210 | ZIO_FLAG_REEXECUTED = 1 << 27, | |
211 | ZIO_FLAG_DELEGATED = 1 << 28, | |
212 | ZIO_FLAG_FASTWRITE = 1 << 29, | |
428870ff BB |
213 | }; |
214 | ||
215 | #define ZIO_FLAG_MUSTSUCCEED 0 | |
216 | ||
217 | #define ZIO_DDT_CHILD_FLAGS(zio) \ | |
218 | (((zio)->io_flags & ZIO_FLAG_DDT_INHERIT) | \ | |
219 | ZIO_FLAG_DDT_CHILD | ZIO_FLAG_CANFAIL) | |
220 | ||
b128c09f BB |
221 | #define ZIO_GANG_CHILD_FLAGS(zio) \ |
222 | (((zio)->io_flags & ZIO_FLAG_GANG_INHERIT) | \ | |
223 | ZIO_FLAG_GANG_CHILD | ZIO_FLAG_CANFAIL) | |
224 | ||
428870ff BB |
225 | #define ZIO_VDEV_CHILD_FLAGS(zio) \ |
226 | (((zio)->io_flags & ZIO_FLAG_VDEV_INHERIT) | \ | |
227 | ZIO_FLAG_CANFAIL) | |
228 | ||
b128c09f BB |
229 | enum zio_child { |
230 | ZIO_CHILD_VDEV = 0, | |
231 | ZIO_CHILD_GANG, | |
428870ff | 232 | ZIO_CHILD_DDT, |
b128c09f BB |
233 | ZIO_CHILD_LOGICAL, |
234 | ZIO_CHILD_TYPES | |
235 | }; | |
236 | ||
237 | enum zio_wait_type { | |
238 | ZIO_WAIT_READY = 0, | |
239 | ZIO_WAIT_DONE, | |
240 | ZIO_WAIT_TYPES | |
241 | }; | |
242 | ||
34dc7c2f BB |
243 | /* |
244 | * We'll take the unused errnos, 'EBADE' and 'EBADR' (from the Convergent | |
245 | * graveyard) to indicate checksum errors and fragmentation. | |
246 | */ | |
247 | #define ECKSUM EBADE | |
248 | #define EFRAGS EBADR | |
249 | ||
34dc7c2f BB |
250 | typedef void zio_done_func_t(zio_t *zio); |
251 | ||
e8b96c60 | 252 | extern const char *zio_type_name[ZIO_TYPES]; |
34dc7c2f BB |
253 | |
254 | /* | |
255 | * A bookmark is a four-tuple <objset, object, level, blkid> that uniquely | |
256 | * identifies any block in the pool. By convention, the meta-objset (MOS) | |
428870ff BB |
257 | * is objset 0, and the meta-dnode is object 0. This covers all blocks |
258 | * except root blocks and ZIL blocks, which are defined as follows: | |
34dc7c2f | 259 | * |
428870ff BB |
260 | * Root blocks (objset_phys_t) are object 0, level -1: <objset, 0, -1, 0>. |
261 | * ZIL blocks are bookmarked <objset, 0, -2, blkid == ZIL sequence number>. | |
262 | * dmu_sync()ed ZIL data blocks are bookmarked <objset, object, -2, blkid>. | |
34dc7c2f | 263 | * |
428870ff BB |
264 | * Note: this structure is called a bookmark because its original purpose |
265 | * was to remember where to resume a pool-wide traverse. | |
34dc7c2f | 266 | * |
5dbd68a3 MA |
267 | * Note: this structure is passed between userland and the kernel, and is |
268 | * stored on disk (by virtue of being incorporated into other on-disk | |
269 | * structures, e.g. dsl_scan_phys_t). | |
34dc7c2f | 270 | */ |
5dbd68a3 | 271 | struct zbookmark_phys { |
34dc7c2f BB |
272 | uint64_t zb_objset; |
273 | uint64_t zb_object; | |
274 | int64_t zb_level; | |
275 | uint64_t zb_blkid; | |
1421c891 | 276 | }; |
34dc7c2f | 277 | |
428870ff BB |
278 | #define SET_BOOKMARK(zb, objset, object, level, blkid) \ |
279 | { \ | |
280 | (zb)->zb_objset = objset; \ | |
281 | (zb)->zb_object = object; \ | |
282 | (zb)->zb_level = level; \ | |
283 | (zb)->zb_blkid = blkid; \ | |
284 | } | |
285 | ||
286 | #define ZB_DESTROYED_OBJSET (-1ULL) | |
287 | ||
288 | #define ZB_ROOT_OBJECT (0ULL) | |
289 | #define ZB_ROOT_LEVEL (-1LL) | |
290 | #define ZB_ROOT_BLKID (0ULL) | |
291 | ||
292 | #define ZB_ZIL_OBJECT (0ULL) | |
293 | #define ZB_ZIL_LEVEL (-2LL) | |
294 | ||
9ae529ec CS |
295 | #define ZB_IS_ZERO(zb) \ |
296 | ((zb)->zb_objset == 0 && (zb)->zb_object == 0 && \ | |
297 | (zb)->zb_level == 0 && (zb)->zb_blkid == 0) | |
298 | #define ZB_IS_ROOT(zb) \ | |
299 | ((zb)->zb_object == ZB_ROOT_OBJECT && \ | |
300 | (zb)->zb_level == ZB_ROOT_LEVEL && \ | |
301 | (zb)->zb_blkid == ZB_ROOT_BLKID) | |
302 | ||
b128c09f BB |
303 | typedef struct zio_prop { |
304 | enum zio_checksum zp_checksum; | |
305 | enum zio_compress zp_compress; | |
306 | dmu_object_type_t zp_type; | |
307 | uint8_t zp_level; | |
428870ff | 308 | uint8_t zp_copies; |
03c6040b GW |
309 | boolean_t zp_dedup; |
310 | boolean_t zp_dedup_verify; | |
311 | boolean_t zp_nopwrite; | |
b128c09f BB |
312 | } zio_prop_t; |
313 | ||
428870ff BB |
314 | typedef struct zio_cksum_report zio_cksum_report_t; |
315 | ||
316 | typedef void zio_cksum_finish_f(zio_cksum_report_t *rep, | |
317 | const void *good_data); | |
318 | typedef void zio_cksum_free_f(void *cbdata, size_t size); | |
319 | ||
320 | struct zio_bad_cksum; /* defined in zio_checksum.h */ | |
9ae529ec | 321 | struct dnode_phys; |
428870ff BB |
322 | |
323 | struct zio_cksum_report { | |
324 | struct zio_cksum_report *zcr_next; | |
325 | nvlist_t *zcr_ereport; | |
326 | nvlist_t *zcr_detector; | |
327 | void *zcr_cbdata; | |
328 | size_t zcr_cbinfo; /* passed to zcr_free() */ | |
329 | uint64_t zcr_align; | |
330 | uint64_t zcr_length; | |
331 | zio_cksum_finish_f *zcr_finish; | |
332 | zio_cksum_free_f *zcr_free; | |
333 | ||
334 | /* internal use only */ | |
335 | struct zio_bad_cksum *zcr_ckinfo; /* information from failure */ | |
336 | }; | |
337 | ||
338 | typedef void zio_vsd_cksum_report_f(zio_t *zio, zio_cksum_report_t *zcr, | |
339 | void *arg); | |
340 | ||
341 | zio_vsd_cksum_report_f zio_vsd_default_cksum_report; | |
342 | ||
343 | typedef struct zio_vsd_ops { | |
344 | zio_done_func_t *vsd_free; | |
345 | zio_vsd_cksum_report_f *vsd_cksum_report; | |
346 | } zio_vsd_ops_t; | |
347 | ||
b128c09f BB |
348 | typedef struct zio_gang_node { |
349 | zio_gbh_phys_t *gn_gbh; | |
350 | struct zio_gang_node *gn_child[SPA_GBH_NBLKPTRS]; | |
351 | } zio_gang_node_t; | |
352 | ||
353 | typedef zio_t *zio_gang_issue_func_t(zio_t *zio, blkptr_t *bp, | |
354 | zio_gang_node_t *gn, void *data); | |
355 | ||
356 | typedef void zio_transform_func_t(zio_t *zio, void *data, uint64_t size); | |
357 | ||
358 | typedef struct zio_transform { | |
359 | void *zt_orig_data; | |
360 | uint64_t zt_orig_size; | |
361 | uint64_t zt_bufsize; | |
362 | zio_transform_func_t *zt_transform; | |
363 | struct zio_transform *zt_next; | |
364 | } zio_transform_t; | |
365 | ||
366 | typedef int zio_pipe_stage_t(zio_t *zio); | |
367 | ||
368 | /* | |
369 | * The io_reexecute flags are distinct from io_flags because the child must | |
370 | * be able to propagate them to the parent. The normal io_flags are local | |
371 | * to the zio, not protected by any lock, and not modifiable by children; | |
372 | * the reexecute flags are protected by io_lock, modifiable by children, | |
373 | * and always propagated -- even when ZIO_FLAG_DONT_PROPAGATE is set. | |
374 | */ | |
375 | #define ZIO_REEXECUTE_NOW 0x01 | |
376 | #define ZIO_REEXECUTE_SUSPEND 0x02 | |
377 | ||
d164b209 BB |
378 | typedef struct zio_link { |
379 | zio_t *zl_parent; | |
380 | zio_t *zl_child; | |
381 | list_node_t zl_parent_node; | |
382 | list_node_t zl_child_node; | |
383 | } zio_link_t; | |
384 | ||
34dc7c2f BB |
385 | struct zio { |
386 | /* Core information about this I/O */ | |
5dbd68a3 | 387 | zbookmark_phys_t io_bookmark; |
b128c09f BB |
388 | zio_prop_t io_prop; |
389 | zio_type_t io_type; | |
390 | enum zio_child io_child_type; | |
391 | int io_cmd; | |
e8b96c60 | 392 | zio_priority_t io_priority; |
b128c09f | 393 | uint8_t io_reexecute; |
d164b209 | 394 | uint8_t io_state[ZIO_WAIT_TYPES]; |
34dc7c2f | 395 | uint64_t io_txg; |
b128c09f | 396 | spa_t *io_spa; |
34dc7c2f | 397 | blkptr_t *io_bp; |
428870ff | 398 | blkptr_t *io_bp_override; |
34dc7c2f | 399 | blkptr_t io_bp_copy; |
d164b209 BB |
400 | list_t io_parent_list; |
401 | list_t io_child_list; | |
402 | zio_link_t *io_walk_link; | |
34dc7c2f | 403 | zio_t *io_logical; |
b128c09f | 404 | zio_transform_t *io_transform_stack; |
34dc7c2f BB |
405 | |
406 | /* Callback info */ | |
e8b96c60 MA |
407 | zio_done_func_t *io_ready; |
408 | zio_done_func_t *io_physdone; | |
34dc7c2f BB |
409 | zio_done_func_t *io_done; |
410 | void *io_private; | |
428870ff | 411 | int64_t io_prev_space_delta; /* DMU private */ |
34dc7c2f BB |
412 | blkptr_t io_bp_orig; |
413 | ||
414 | /* Data represented by this I/O */ | |
415 | void *io_data; | |
428870ff | 416 | void *io_orig_data; |
34dc7c2f | 417 | uint64_t io_size; |
428870ff | 418 | uint64_t io_orig_size; |
34dc7c2f BB |
419 | |
420 | /* Stuff for the vdev stack */ | |
421 | vdev_t *io_vd; | |
422 | void *io_vsd; | |
428870ff BB |
423 | const zio_vsd_ops_t *io_vsd_ops; |
424 | ||
34dc7c2f | 425 | uint64_t io_offset; |
cb682a17 MA |
426 | hrtime_t io_timestamp; /* submitted at */ |
427 | hrtime_t io_delta; /* vdev queue service delta */ | |
cc92e9d0 | 428 | uint64_t io_delay; /* vdev disk service delta (ticks) */ |
e8b96c60 | 429 | avl_node_t io_queue_node; |
34dc7c2f BB |
430 | |
431 | /* Internal pipeline state */ | |
428870ff BB |
432 | enum zio_flag io_flags; |
433 | enum zio_stage io_stage; | |
434 | enum zio_stage io_pipeline; | |
435 | enum zio_flag io_orig_flags; | |
436 | enum zio_stage io_orig_stage; | |
437 | enum zio_stage io_orig_pipeline; | |
b128c09f BB |
438 | int io_error; |
439 | int io_child_error[ZIO_CHILD_TYPES]; | |
440 | uint64_t io_children[ZIO_CHILD_TYPES][ZIO_WAIT_TYPES]; | |
428870ff | 441 | uint64_t io_child_count; |
e8b96c60 | 442 | uint64_t io_phys_children; |
428870ff | 443 | uint64_t io_parent_count; |
b128c09f | 444 | uint64_t *io_stall; |
9babb374 | 445 | zio_t *io_gang_leader; |
b128c09f BB |
446 | zio_gang_node_t *io_gang_tree; |
447 | void *io_executor; | |
34dc7c2f BB |
448 | void *io_waiter; |
449 | kmutex_t io_lock; | |
450 | kcondvar_t io_cv; | |
451 | ||
452 | /* FMA state */ | |
428870ff | 453 | zio_cksum_report_t *io_cksum_report; |
34dc7c2f | 454 | uint64_t io_ena; |
a38718a6 GA |
455 | |
456 | /* Taskq dispatching state */ | |
457 | taskq_ent_t io_tqent; | |
34dc7c2f BB |
458 | }; |
459 | ||
d164b209 | 460 | extern zio_t *zio_null(zio_t *pio, spa_t *spa, vdev_t *vd, |
428870ff | 461 | zio_done_func_t *done, void *private, enum zio_flag flags); |
34dc7c2f BB |
462 | |
463 | extern zio_t *zio_root(spa_t *spa, | |
428870ff | 464 | zio_done_func_t *done, void *private, enum zio_flag flags); |
34dc7c2f | 465 | |
b128c09f | 466 | extern zio_t *zio_read(zio_t *pio, spa_t *spa, const blkptr_t *bp, void *data, |
34dc7c2f | 467 | uint64_t size, zio_done_func_t *done, void *private, |
5dbd68a3 | 468 | zio_priority_t priority, enum zio_flag flags, const zbookmark_phys_t *zb); |
34dc7c2f | 469 | |
b128c09f | 470 | extern zio_t *zio_write(zio_t *pio, spa_t *spa, uint64_t txg, blkptr_t *bp, |
428870ff | 471 | void *data, uint64_t size, const zio_prop_t *zp, |
e8b96c60 MA |
472 | zio_done_func_t *ready, zio_done_func_t *physdone, zio_done_func_t *done, |
473 | void *private, | |
5dbd68a3 | 474 | zio_priority_t priority, enum zio_flag flags, const zbookmark_phys_t *zb); |
34dc7c2f | 475 | |
b128c09f BB |
476 | extern zio_t *zio_rewrite(zio_t *pio, spa_t *spa, uint64_t txg, blkptr_t *bp, |
477 | void *data, uint64_t size, zio_done_func_t *done, void *private, | |
5dbd68a3 | 478 | zio_priority_t priority, enum zio_flag flags, zbookmark_phys_t *zb); |
b128c09f | 479 | |
03c6040b GW |
480 | extern void zio_write_override(zio_t *zio, blkptr_t *bp, int copies, |
481 | boolean_t nopwrite); | |
34dc7c2f | 482 | |
428870ff | 483 | extern void zio_free(spa_t *spa, uint64_t txg, const blkptr_t *bp); |
34dc7c2f | 484 | |
428870ff BB |
485 | extern zio_t *zio_claim(zio_t *pio, spa_t *spa, uint64_t txg, |
486 | const blkptr_t *bp, | |
487 | zio_done_func_t *done, void *private, enum zio_flag flags); | |
34dc7c2f BB |
488 | |
489 | extern zio_t *zio_ioctl(zio_t *pio, spa_t *spa, vdev_t *vd, int cmd, | |
e8b96c60 | 490 | zio_done_func_t *done, void *private, enum zio_flag flags); |
34dc7c2f BB |
491 | |
492 | extern zio_t *zio_read_phys(zio_t *pio, vdev_t *vd, uint64_t offset, | |
493 | uint64_t size, void *data, int checksum, | |
e8b96c60 MA |
494 | zio_done_func_t *done, void *private, zio_priority_t priority, |
495 | enum zio_flag flags, boolean_t labels); | |
34dc7c2f BB |
496 | |
497 | extern zio_t *zio_write_phys(zio_t *pio, vdev_t *vd, uint64_t offset, | |
498 | uint64_t size, void *data, int checksum, | |
e8b96c60 MA |
499 | zio_done_func_t *done, void *private, zio_priority_t priority, |
500 | enum zio_flag flags, boolean_t labels); | |
34dc7c2f | 501 | |
428870ff BB |
502 | extern zio_t *zio_free_sync(zio_t *pio, spa_t *spa, uint64_t txg, |
503 | const blkptr_t *bp, enum zio_flag flags); | |
504 | ||
505 | extern int zio_alloc_zil(spa_t *spa, uint64_t txg, blkptr_t *new_bp, | |
920dd524 | 506 | uint64_t size, boolean_t use_slog); |
428870ff | 507 | extern void zio_free_zil(spa_t *spa, uint64_t txg, blkptr_t *bp); |
34dc7c2f | 508 | extern void zio_flush(zio_t *zio, vdev_t *vd); |
428870ff | 509 | extern void zio_shrink(zio_t *zio, uint64_t size); |
34dc7c2f BB |
510 | |
511 | extern int zio_wait(zio_t *zio); | |
512 | extern void zio_nowait(zio_t *zio); | |
513 | extern void zio_execute(zio_t *zio); | |
514 | extern void zio_interrupt(zio_t *zio); | |
515 | ||
d164b209 BB |
516 | extern zio_t *zio_walk_parents(zio_t *cio); |
517 | extern zio_t *zio_walk_children(zio_t *pio); | |
518 | extern zio_t *zio_unique_parent(zio_t *cio); | |
519 | extern void zio_add_child(zio_t *pio, zio_t *cio); | |
520 | ||
34dc7c2f BB |
521 | extern void *zio_buf_alloc(size_t size); |
522 | extern void zio_buf_free(void *buf, size_t size); | |
523 | extern void *zio_data_buf_alloc(size_t size); | |
524 | extern void zio_data_buf_free(void *buf, size_t size); | |
525 | ||
526 | extern void zio_resubmit_stage_async(void *); | |
527 | ||
34dc7c2f | 528 | extern zio_t *zio_vdev_child_io(zio_t *zio, blkptr_t *bp, vdev_t *vd, |
e8b96c60 MA |
529 | uint64_t offset, void *data, uint64_t size, int type, |
530 | zio_priority_t priority, enum zio_flag flags, | |
531 | zio_done_func_t *done, void *private); | |
34dc7c2f | 532 | |
b128c09f | 533 | extern zio_t *zio_vdev_delegated_io(vdev_t *vd, uint64_t offset, |
e8b96c60 | 534 | void *data, uint64_t size, int type, zio_priority_t priority, |
428870ff | 535 | enum zio_flag flags, zio_done_func_t *done, void *private); |
b128c09f | 536 | |
34dc7c2f BB |
537 | extern void zio_vdev_io_bypass(zio_t *zio); |
538 | extern void zio_vdev_io_reissue(zio_t *zio); | |
539 | extern void zio_vdev_io_redone(zio_t *zio); | |
540 | ||
541 | extern void zio_checksum_verified(zio_t *zio); | |
b128c09f | 542 | extern int zio_worst_error(int e1, int e2); |
34dc7c2f | 543 | |
428870ff BB |
544 | extern enum zio_checksum zio_checksum_select(enum zio_checksum child, |
545 | enum zio_checksum parent); | |
546 | extern enum zio_checksum zio_checksum_dedup_select(spa_t *spa, | |
547 | enum zio_checksum child, enum zio_checksum parent); | |
548 | extern enum zio_compress zio_compress_select(enum zio_compress child, | |
549 | enum zio_compress parent); | |
34dc7c2f | 550 | |
b128c09f | 551 | extern void zio_suspend(spa_t *spa, zio_t *zio); |
9babb374 | 552 | extern int zio_resume(spa_t *spa); |
b128c09f | 553 | extern void zio_resume_wait(spa_t *spa); |
34dc7c2f BB |
554 | |
555 | /* | |
556 | * Initial setup and teardown. | |
557 | */ | |
558 | extern void zio_init(void); | |
559 | extern void zio_fini(void); | |
560 | ||
561 | /* | |
562 | * Fault injection | |
563 | */ | |
564 | struct zinject_record; | |
565 | extern uint32_t zio_injection_enabled; | |
566 | extern int zio_inject_fault(char *name, int flags, int *id, | |
567 | struct zinject_record *record); | |
568 | extern int zio_inject_list_next(int *id, char *name, size_t buflen, | |
569 | struct zinject_record *record); | |
570 | extern int zio_clear_fault(int id); | |
428870ff | 571 | extern void zio_handle_panic_injection(spa_t *spa, char *tag, uint64_t type); |
34dc7c2f | 572 | extern int zio_handle_fault_injection(zio_t *zio, int error); |
9babb374 | 573 | extern int zio_handle_device_injection(vdev_t *vd, zio_t *zio, int error); |
b128c09f | 574 | extern int zio_handle_label_injection(zio_t *zio, int error); |
428870ff | 575 | extern void zio_handle_ignored_writes(zio_t *zio); |
cc92e9d0 | 576 | extern uint64_t zio_handle_io_delay(zio_t *zio); |
428870ff BB |
577 | |
578 | /* | |
579 | * Checksum ereport functions | |
580 | */ | |
581 | extern void zfs_ereport_start_checksum(spa_t *spa, vdev_t *vd, struct zio *zio, | |
582 | uint64_t offset, uint64_t length, void *arg, struct zio_bad_cksum *info); | |
583 | extern void zfs_ereport_finish_checksum(zio_cksum_report_t *report, | |
584 | const void *good_data, const void *bad_data, boolean_t drop_if_identical); | |
585 | ||
586 | extern void zfs_ereport_send_interim_checksum(zio_cksum_report_t *report); | |
587 | extern void zfs_ereport_free_checksum(zio_cksum_report_t *report); | |
588 | ||
589 | /* If we have the good data in hand, this function can be used */ | |
590 | extern void zfs_ereport_post_checksum(spa_t *spa, vdev_t *vd, | |
591 | struct zio *zio, uint64_t offset, uint64_t length, | |
592 | const void *good_data, const void *bad_data, struct zio_bad_cksum *info); | |
593 | ||
594 | /* Called from spa_sync(), but primarily an injection handler */ | |
595 | extern void spa_handle_ignored_writes(spa_t *spa); | |
34dc7c2f | 596 | |
5dbd68a3 | 597 | /* zbookmark_phys functions */ |
9ae529ec | 598 | boolean_t zbookmark_is_before(const struct dnode_phys *dnp, |
5dbd68a3 | 599 | const zbookmark_phys_t *zb1, const zbookmark_phys_t *zb2); |
9ae529ec | 600 | |
34dc7c2f BB |
601 | #ifdef __cplusplus |
602 | } | |
603 | #endif | |
604 | ||
605 | #endif /* _ZIO_H */ |