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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 | ||
fcff0f35 | 32 | #include <sys/zio_priority.h> |
34dc7c2f BB |
33 | #include <sys/zfs_context.h> |
34 | #include <sys/spa.h> | |
35 | #include <sys/txg.h> | |
36 | #include <sys/avl.h> | |
34dc7c2f BB |
37 | #include <sys/fs/zfs.h> |
38 | #include <sys/zio_impl.h> | |
39 | ||
40 | #ifdef __cplusplus | |
41 | extern "C" { | |
42 | #endif | |
43 | ||
428870ff BB |
44 | /* |
45 | * Embedded checksum | |
46 | */ | |
47 | #define ZEC_MAGIC 0x210da7ab10c7a11ULL | |
34dc7c2f | 48 | |
428870ff BB |
49 | typedef struct zio_eck { |
50 | uint64_t zec_magic; /* for validation, endianness */ | |
51 | zio_cksum_t zec_cksum; /* 256-bit checksum */ | |
52 | } zio_eck_t; | |
34dc7c2f BB |
53 | |
54 | /* | |
55 | * Gang block headers are self-checksumming and contain an array | |
56 | * of block pointers. | |
57 | */ | |
58 | #define SPA_GANGBLOCKSIZE SPA_MINBLOCKSIZE | |
59 | #define SPA_GBH_NBLKPTRS ((SPA_GANGBLOCKSIZE - \ | |
428870ff | 60 | sizeof (zio_eck_t)) / sizeof (blkptr_t)) |
34dc7c2f | 61 | #define SPA_GBH_FILLER ((SPA_GANGBLOCKSIZE - \ |
428870ff | 62 | sizeof (zio_eck_t) - \ |
34dc7c2f BB |
63 | (SPA_GBH_NBLKPTRS * sizeof (blkptr_t))) /\ |
64 | sizeof (uint64_t)) | |
65 | ||
34dc7c2f BB |
66 | typedef struct zio_gbh { |
67 | blkptr_t zg_blkptr[SPA_GBH_NBLKPTRS]; | |
68 | uint64_t zg_filler[SPA_GBH_FILLER]; | |
428870ff | 69 | zio_eck_t zg_tail; |
34dc7c2f BB |
70 | } zio_gbh_phys_t; |
71 | ||
72 | enum zio_checksum { | |
73 | ZIO_CHECKSUM_INHERIT = 0, | |
74 | ZIO_CHECKSUM_ON, | |
75 | ZIO_CHECKSUM_OFF, | |
76 | ZIO_CHECKSUM_LABEL, | |
77 | ZIO_CHECKSUM_GANG_HEADER, | |
78 | ZIO_CHECKSUM_ZILOG, | |
79 | ZIO_CHECKSUM_FLETCHER_2, | |
80 | ZIO_CHECKSUM_FLETCHER_4, | |
81 | ZIO_CHECKSUM_SHA256, | |
428870ff | 82 | ZIO_CHECKSUM_ZILOG2, |
34dc7c2f BB |
83 | ZIO_CHECKSUM_FUNCTIONS |
84 | }; | |
85 | ||
9b67f605 MA |
86 | /* |
87 | * The number of "legacy" compression functions which can be set on individual | |
88 | * objects. | |
89 | */ | |
90 | #define ZIO_CHECKSUM_LEGACY_FUNCTIONS ZIO_CHECKSUM_ZILOG2 | |
91 | ||
9babb374 | 92 | #define ZIO_CHECKSUM_ON_VALUE ZIO_CHECKSUM_FLETCHER_4 |
34dc7c2f BB |
93 | #define ZIO_CHECKSUM_DEFAULT ZIO_CHECKSUM_ON |
94 | ||
428870ff BB |
95 | #define ZIO_CHECKSUM_MASK 0xffULL |
96 | #define ZIO_CHECKSUM_VERIFY (1 << 8) | |
97 | ||
98 | #define ZIO_DEDUPCHECKSUM ZIO_CHECKSUM_SHA256 | |
99 | #define ZIO_DEDUPDITTO_MIN 100 | |
100 | ||
34dc7c2f BB |
101 | enum zio_compress { |
102 | ZIO_COMPRESS_INHERIT = 0, | |
103 | ZIO_COMPRESS_ON, | |
104 | ZIO_COMPRESS_OFF, | |
105 | ZIO_COMPRESS_LZJB, | |
106 | ZIO_COMPRESS_EMPTY, | |
107 | ZIO_COMPRESS_GZIP_1, | |
108 | ZIO_COMPRESS_GZIP_2, | |
109 | ZIO_COMPRESS_GZIP_3, | |
110 | ZIO_COMPRESS_GZIP_4, | |
111 | ZIO_COMPRESS_GZIP_5, | |
112 | ZIO_COMPRESS_GZIP_6, | |
113 | ZIO_COMPRESS_GZIP_7, | |
114 | ZIO_COMPRESS_GZIP_8, | |
115 | ZIO_COMPRESS_GZIP_9, | |
428870ff | 116 | ZIO_COMPRESS_ZLE, |
9759c60f | 117 | ZIO_COMPRESS_LZ4, |
34dc7c2f BB |
118 | ZIO_COMPRESS_FUNCTIONS |
119 | }; | |
120 | ||
9b67f605 MA |
121 | /* |
122 | * The number of "legacy" compression functions which can be set on individual | |
123 | * objects. | |
124 | */ | |
125 | #define ZIO_COMPRESS_LEGACY_FUNCTIONS ZIO_COMPRESS_LZ4 | |
126 | ||
99197f03 JG |
127 | /* |
128 | * The meaning of "compress = on" selected by the compression features enabled | |
129 | * on a given pool. | |
130 | */ | |
131 | #define ZIO_COMPRESS_LEGACY_ON_VALUE ZIO_COMPRESS_LZJB | |
132 | #define ZIO_COMPRESS_LZ4_ON_VALUE ZIO_COMPRESS_LZ4 | |
133 | ||
134 | #define ZIO_COMPRESS_DEFAULT ZIO_COMPRESS_OFF | |
34dc7c2f | 135 | |
428870ff BB |
136 | #define BOOTFS_COMPRESS_VALID(compress) \ |
137 | ((compress) == ZIO_COMPRESS_LZJB || \ | |
9759c60f | 138 | (compress) == ZIO_COMPRESS_LZ4 || \ |
99197f03 | 139 | (compress) == ZIO_COMPRESS_ON || \ |
428870ff BB |
140 | (compress) == ZIO_COMPRESS_OFF) |
141 | ||
a69052be BB |
142 | /* |
143 | * Default Linux timeout for a sd device. | |
144 | */ | |
d1d7e268 | 145 | #define ZIO_DELAY_MAX (30 * MILLISEC) |
a69052be | 146 | |
34dc7c2f BB |
147 | #define ZIO_FAILURE_MODE_WAIT 0 |
148 | #define ZIO_FAILURE_MODE_CONTINUE 1 | |
149 | #define ZIO_FAILURE_MODE_PANIC 2 | |
150 | ||
428870ff BB |
151 | enum zio_flag { |
152 | /* | |
153 | * Flags inherited by gang, ddt, and vdev children, | |
154 | * and that must be equal for two zios to aggregate | |
155 | */ | |
156 | ZIO_FLAG_DONT_AGGREGATE = 1 << 0, | |
157 | ZIO_FLAG_IO_REPAIR = 1 << 1, | |
158 | ZIO_FLAG_SELF_HEAL = 1 << 2, | |
159 | ZIO_FLAG_RESILVER = 1 << 3, | |
160 | ZIO_FLAG_SCRUB = 1 << 4, | |
572e2857 | 161 | ZIO_FLAG_SCAN_THREAD = 1 << 5, |
b02fe35d | 162 | ZIO_FLAG_PHYSICAL = 1 << 6, |
428870ff BB |
163 | |
164 | #define ZIO_FLAG_AGG_INHERIT (ZIO_FLAG_CANFAIL - 1) | |
165 | ||
166 | /* | |
167 | * Flags inherited by ddt, gang, and vdev children. | |
168 | */ | |
b02fe35d AR |
169 | ZIO_FLAG_CANFAIL = 1 << 7, /* must be first for INHERIT */ |
170 | ZIO_FLAG_SPECULATIVE = 1 << 8, | |
171 | ZIO_FLAG_CONFIG_WRITER = 1 << 9, | |
172 | ZIO_FLAG_DONT_RETRY = 1 << 10, | |
173 | ZIO_FLAG_DONT_CACHE = 1 << 11, | |
174 | ZIO_FLAG_NODATA = 1 << 12, | |
175 | ZIO_FLAG_INDUCE_DAMAGE = 1 << 13, | |
428870ff BB |
176 | |
177 | #define ZIO_FLAG_DDT_INHERIT (ZIO_FLAG_IO_RETRY - 1) | |
178 | #define ZIO_FLAG_GANG_INHERIT (ZIO_FLAG_IO_RETRY - 1) | |
179 | ||
180 | /* | |
181 | * Flags inherited by vdev children. | |
182 | */ | |
b02fe35d AR |
183 | ZIO_FLAG_IO_RETRY = 1 << 14, /* must be first for INHERIT */ |
184 | ZIO_FLAG_PROBE = 1 << 15, | |
185 | ZIO_FLAG_TRYHARD = 1 << 16, | |
186 | ZIO_FLAG_OPTIONAL = 1 << 17, | |
428870ff BB |
187 | |
188 | #define ZIO_FLAG_VDEV_INHERIT (ZIO_FLAG_DONT_QUEUE - 1) | |
189 | ||
190 | /* | |
191 | * Flags not inherited by any children. | |
192 | */ | |
b02fe35d AR |
193 | ZIO_FLAG_DONT_QUEUE = 1 << 18, /* must be first for INHERIT */ |
194 | ZIO_FLAG_DONT_PROPAGATE = 1 << 19, | |
195 | ZIO_FLAG_IO_BYPASS = 1 << 20, | |
196 | ZIO_FLAG_IO_REWRITE = 1 << 21, | |
197 | ZIO_FLAG_RAW = 1 << 22, | |
198 | ZIO_FLAG_GANG_CHILD = 1 << 23, | |
199 | ZIO_FLAG_DDT_CHILD = 1 << 24, | |
200 | ZIO_FLAG_GODFATHER = 1 << 25, | |
201 | ZIO_FLAG_NOPWRITE = 1 << 26, | |
202 | ZIO_FLAG_REEXECUTED = 1 << 27, | |
203 | ZIO_FLAG_DELEGATED = 1 << 28, | |
204 | ZIO_FLAG_FASTWRITE = 1 << 29, | |
428870ff BB |
205 | }; |
206 | ||
207 | #define ZIO_FLAG_MUSTSUCCEED 0 | |
208 | ||
209 | #define ZIO_DDT_CHILD_FLAGS(zio) \ | |
210 | (((zio)->io_flags & ZIO_FLAG_DDT_INHERIT) | \ | |
211 | ZIO_FLAG_DDT_CHILD | ZIO_FLAG_CANFAIL) | |
212 | ||
b128c09f BB |
213 | #define ZIO_GANG_CHILD_FLAGS(zio) \ |
214 | (((zio)->io_flags & ZIO_FLAG_GANG_INHERIT) | \ | |
215 | ZIO_FLAG_GANG_CHILD | ZIO_FLAG_CANFAIL) | |
216 | ||
428870ff BB |
217 | #define ZIO_VDEV_CHILD_FLAGS(zio) \ |
218 | (((zio)->io_flags & ZIO_FLAG_VDEV_INHERIT) | \ | |
219 | ZIO_FLAG_CANFAIL) | |
220 | ||
b128c09f BB |
221 | enum zio_child { |
222 | ZIO_CHILD_VDEV = 0, | |
223 | ZIO_CHILD_GANG, | |
428870ff | 224 | ZIO_CHILD_DDT, |
b128c09f BB |
225 | ZIO_CHILD_LOGICAL, |
226 | ZIO_CHILD_TYPES | |
227 | }; | |
228 | ||
229 | enum zio_wait_type { | |
230 | ZIO_WAIT_READY = 0, | |
231 | ZIO_WAIT_DONE, | |
232 | ZIO_WAIT_TYPES | |
233 | }; | |
234 | ||
34dc7c2f BB |
235 | /* |
236 | * We'll take the unused errnos, 'EBADE' and 'EBADR' (from the Convergent | |
237 | * graveyard) to indicate checksum errors and fragmentation. | |
238 | */ | |
239 | #define ECKSUM EBADE | |
240 | #define EFRAGS EBADR | |
241 | ||
34dc7c2f BB |
242 | typedef void zio_done_func_t(zio_t *zio); |
243 | ||
e8b96c60 | 244 | extern const char *zio_type_name[ZIO_TYPES]; |
34dc7c2f BB |
245 | |
246 | /* | |
247 | * A bookmark is a four-tuple <objset, object, level, blkid> that uniquely | |
248 | * identifies any block in the pool. By convention, the meta-objset (MOS) | |
428870ff BB |
249 | * is objset 0, and the meta-dnode is object 0. This covers all blocks |
250 | * except root blocks and ZIL blocks, which are defined as follows: | |
34dc7c2f | 251 | * |
428870ff BB |
252 | * Root blocks (objset_phys_t) are object 0, level -1: <objset, 0, -1, 0>. |
253 | * ZIL blocks are bookmarked <objset, 0, -2, blkid == ZIL sequence number>. | |
254 | * dmu_sync()ed ZIL data blocks are bookmarked <objset, object, -2, blkid>. | |
fcff0f35 | 255 | * dnode visit bookmarks are <objset, object id of dnode, -3, 0>. |
34dc7c2f | 256 | * |
428870ff BB |
257 | * Note: this structure is called a bookmark because its original purpose |
258 | * was to remember where to resume a pool-wide traverse. | |
34dc7c2f | 259 | * |
5dbd68a3 MA |
260 | * Note: this structure is passed between userland and the kernel, and is |
261 | * stored on disk (by virtue of being incorporated into other on-disk | |
262 | * structures, e.g. dsl_scan_phys_t). | |
34dc7c2f | 263 | */ |
5dbd68a3 | 264 | struct zbookmark_phys { |
34dc7c2f BB |
265 | uint64_t zb_objset; |
266 | uint64_t zb_object; | |
267 | int64_t zb_level; | |
268 | uint64_t zb_blkid; | |
1421c891 | 269 | }; |
34dc7c2f | 270 | |
428870ff BB |
271 | #define SET_BOOKMARK(zb, objset, object, level, blkid) \ |
272 | { \ | |
273 | (zb)->zb_objset = objset; \ | |
274 | (zb)->zb_object = object; \ | |
275 | (zb)->zb_level = level; \ | |
276 | (zb)->zb_blkid = blkid; \ | |
277 | } | |
278 | ||
279 | #define ZB_DESTROYED_OBJSET (-1ULL) | |
280 | ||
281 | #define ZB_ROOT_OBJECT (0ULL) | |
282 | #define ZB_ROOT_LEVEL (-1LL) | |
283 | #define ZB_ROOT_BLKID (0ULL) | |
284 | ||
285 | #define ZB_ZIL_OBJECT (0ULL) | |
286 | #define ZB_ZIL_LEVEL (-2LL) | |
287 | ||
fcff0f35 PD |
288 | #define ZB_DNODE_LEVEL (-3LL) |
289 | #define ZB_DNODE_BLKID (0ULL) | |
290 | ||
9ae529ec CS |
291 | #define ZB_IS_ZERO(zb) \ |
292 | ((zb)->zb_objset == 0 && (zb)->zb_object == 0 && \ | |
293 | (zb)->zb_level == 0 && (zb)->zb_blkid == 0) | |
294 | #define ZB_IS_ROOT(zb) \ | |
295 | ((zb)->zb_object == ZB_ROOT_OBJECT && \ | |
296 | (zb)->zb_level == ZB_ROOT_LEVEL && \ | |
297 | (zb)->zb_blkid == ZB_ROOT_BLKID) | |
298 | ||
b128c09f BB |
299 | typedef struct zio_prop { |
300 | enum zio_checksum zp_checksum; | |
301 | enum zio_compress zp_compress; | |
302 | dmu_object_type_t zp_type; | |
303 | uint8_t zp_level; | |
428870ff | 304 | uint8_t zp_copies; |
03c6040b GW |
305 | boolean_t zp_dedup; |
306 | boolean_t zp_dedup_verify; | |
307 | boolean_t zp_nopwrite; | |
b128c09f BB |
308 | } zio_prop_t; |
309 | ||
428870ff BB |
310 | typedef struct zio_cksum_report zio_cksum_report_t; |
311 | ||
312 | typedef void zio_cksum_finish_f(zio_cksum_report_t *rep, | |
313 | const void *good_data); | |
314 | typedef void zio_cksum_free_f(void *cbdata, size_t size); | |
315 | ||
316 | struct zio_bad_cksum; /* defined in zio_checksum.h */ | |
9ae529ec | 317 | struct dnode_phys; |
428870ff BB |
318 | |
319 | struct zio_cksum_report { | |
320 | struct zio_cksum_report *zcr_next; | |
321 | nvlist_t *zcr_ereport; | |
322 | nvlist_t *zcr_detector; | |
323 | void *zcr_cbdata; | |
324 | size_t zcr_cbinfo; /* passed to zcr_free() */ | |
325 | uint64_t zcr_align; | |
326 | uint64_t zcr_length; | |
327 | zio_cksum_finish_f *zcr_finish; | |
328 | zio_cksum_free_f *zcr_free; | |
329 | ||
330 | /* internal use only */ | |
331 | struct zio_bad_cksum *zcr_ckinfo; /* information from failure */ | |
332 | }; | |
333 | ||
334 | typedef void zio_vsd_cksum_report_f(zio_t *zio, zio_cksum_report_t *zcr, | |
335 | void *arg); | |
336 | ||
337 | zio_vsd_cksum_report_f zio_vsd_default_cksum_report; | |
338 | ||
339 | typedef struct zio_vsd_ops { | |
340 | zio_done_func_t *vsd_free; | |
341 | zio_vsd_cksum_report_f *vsd_cksum_report; | |
342 | } zio_vsd_ops_t; | |
343 | ||
b128c09f BB |
344 | typedef struct zio_gang_node { |
345 | zio_gbh_phys_t *gn_gbh; | |
346 | struct zio_gang_node *gn_child[SPA_GBH_NBLKPTRS]; | |
347 | } zio_gang_node_t; | |
348 | ||
349 | typedef zio_t *zio_gang_issue_func_t(zio_t *zio, blkptr_t *bp, | |
350 | zio_gang_node_t *gn, void *data); | |
351 | ||
352 | typedef void zio_transform_func_t(zio_t *zio, void *data, uint64_t size); | |
353 | ||
354 | typedef struct zio_transform { | |
355 | void *zt_orig_data; | |
356 | uint64_t zt_orig_size; | |
357 | uint64_t zt_bufsize; | |
358 | zio_transform_func_t *zt_transform; | |
359 | struct zio_transform *zt_next; | |
360 | } zio_transform_t; | |
361 | ||
362 | typedef int zio_pipe_stage_t(zio_t *zio); | |
363 | ||
364 | /* | |
365 | * The io_reexecute flags are distinct from io_flags because the child must | |
366 | * be able to propagate them to the parent. The normal io_flags are local | |
367 | * to the zio, not protected by any lock, and not modifiable by children; | |
368 | * the reexecute flags are protected by io_lock, modifiable by children, | |
369 | * and always propagated -- even when ZIO_FLAG_DONT_PROPAGATE is set. | |
370 | */ | |
371 | #define ZIO_REEXECUTE_NOW 0x01 | |
372 | #define ZIO_REEXECUTE_SUSPEND 0x02 | |
373 | ||
d164b209 BB |
374 | typedef struct zio_link { |
375 | zio_t *zl_parent; | |
376 | zio_t *zl_child; | |
377 | list_node_t zl_parent_node; | |
378 | list_node_t zl_child_node; | |
379 | } zio_link_t; | |
380 | ||
34dc7c2f BB |
381 | struct zio { |
382 | /* Core information about this I/O */ | |
5dbd68a3 | 383 | zbookmark_phys_t io_bookmark; |
b128c09f BB |
384 | zio_prop_t io_prop; |
385 | zio_type_t io_type; | |
386 | enum zio_child io_child_type; | |
387 | int io_cmd; | |
e8b96c60 | 388 | zio_priority_t io_priority; |
b128c09f | 389 | uint8_t io_reexecute; |
d164b209 | 390 | uint8_t io_state[ZIO_WAIT_TYPES]; |
34dc7c2f | 391 | uint64_t io_txg; |
b128c09f | 392 | spa_t *io_spa; |
34dc7c2f | 393 | blkptr_t *io_bp; |
428870ff | 394 | blkptr_t *io_bp_override; |
34dc7c2f | 395 | blkptr_t io_bp_copy; |
d164b209 BB |
396 | list_t io_parent_list; |
397 | list_t io_child_list; | |
398 | zio_link_t *io_walk_link; | |
34dc7c2f | 399 | zio_t *io_logical; |
b128c09f | 400 | zio_transform_t *io_transform_stack; |
34dc7c2f BB |
401 | |
402 | /* Callback info */ | |
e8b96c60 MA |
403 | zio_done_func_t *io_ready; |
404 | zio_done_func_t *io_physdone; | |
34dc7c2f BB |
405 | zio_done_func_t *io_done; |
406 | void *io_private; | |
428870ff | 407 | int64_t io_prev_space_delta; /* DMU private */ |
34dc7c2f BB |
408 | blkptr_t io_bp_orig; |
409 | ||
410 | /* Data represented by this I/O */ | |
411 | void *io_data; | |
428870ff | 412 | void *io_orig_data; |
34dc7c2f | 413 | uint64_t io_size; |
428870ff | 414 | uint64_t io_orig_size; |
34dc7c2f BB |
415 | |
416 | /* Stuff for the vdev stack */ | |
417 | vdev_t *io_vd; | |
418 | void *io_vsd; | |
428870ff BB |
419 | const zio_vsd_ops_t *io_vsd_ops; |
420 | ||
34dc7c2f | 421 | uint64_t io_offset; |
cb682a17 | 422 | hrtime_t io_timestamp; /* submitted at */ |
26ef0cc7 | 423 | hrtime_t io_target_timestamp; |
cb682a17 | 424 | hrtime_t io_delta; /* vdev queue service delta */ |
193a37cb TH |
425 | hrtime_t io_delay; /* Device access time (disk or */ |
426 | /* file). */ | |
e8b96c60 | 427 | avl_node_t io_queue_node; |
ec8501ee | 428 | avl_node_t io_offset_node; |
34dc7c2f BB |
429 | |
430 | /* Internal pipeline state */ | |
428870ff BB |
431 | enum zio_flag io_flags; |
432 | enum zio_stage io_stage; | |
433 | enum zio_stage io_pipeline; | |
434 | enum zio_flag io_orig_flags; | |
435 | enum zio_stage io_orig_stage; | |
436 | enum zio_stage io_orig_pipeline; | |
b128c09f BB |
437 | int io_error; |
438 | int io_child_error[ZIO_CHILD_TYPES]; | |
439 | uint64_t io_children[ZIO_CHILD_TYPES][ZIO_WAIT_TYPES]; | |
428870ff | 440 | uint64_t io_child_count; |
e8b96c60 | 441 | uint64_t io_phys_children; |
428870ff | 442 | uint64_t io_parent_count; |
b128c09f | 443 | uint64_t *io_stall; |
9babb374 | 444 | zio_t *io_gang_leader; |
b128c09f BB |
445 | zio_gang_node_t *io_gang_tree; |
446 | void *io_executor; | |
34dc7c2f BB |
447 | void *io_waiter; |
448 | kmutex_t io_lock; | |
449 | kcondvar_t io_cv; | |
450 | ||
451 | /* FMA state */ | |
428870ff | 452 | zio_cksum_report_t *io_cksum_report; |
34dc7c2f | 453 | uint64_t io_ena; |
a38718a6 GA |
454 | |
455 | /* Taskq dispatching state */ | |
456 | taskq_ent_t io_tqent; | |
34dc7c2f BB |
457 | }; |
458 | ||
d164b209 | 459 | extern zio_t *zio_null(zio_t *pio, spa_t *spa, vdev_t *vd, |
428870ff | 460 | zio_done_func_t *done, void *private, enum zio_flag flags); |
34dc7c2f BB |
461 | |
462 | extern zio_t *zio_root(spa_t *spa, | |
428870ff | 463 | zio_done_func_t *done, void *private, enum zio_flag flags); |
34dc7c2f | 464 | |
b128c09f | 465 | extern zio_t *zio_read(zio_t *pio, spa_t *spa, const blkptr_t *bp, void *data, |
34dc7c2f | 466 | uint64_t size, zio_done_func_t *done, void *private, |
5dbd68a3 | 467 | zio_priority_t priority, enum zio_flag flags, const zbookmark_phys_t *zb); |
34dc7c2f | 468 | |
b128c09f | 469 | extern zio_t *zio_write(zio_t *pio, spa_t *spa, uint64_t txg, blkptr_t *bp, |
428870ff | 470 | void *data, uint64_t size, const zio_prop_t *zp, |
e8b96c60 MA |
471 | zio_done_func_t *ready, zio_done_func_t *physdone, zio_done_func_t *done, |
472 | void *private, | |
5dbd68a3 | 473 | zio_priority_t priority, enum zio_flag flags, const zbookmark_phys_t *zb); |
34dc7c2f | 474 | |
b128c09f BB |
475 | extern zio_t *zio_rewrite(zio_t *pio, spa_t *spa, uint64_t txg, blkptr_t *bp, |
476 | void *data, uint64_t size, zio_done_func_t *done, void *private, | |
5dbd68a3 | 477 | zio_priority_t priority, enum zio_flag flags, zbookmark_phys_t *zb); |
b128c09f | 478 | |
03c6040b GW |
479 | extern void zio_write_override(zio_t *zio, blkptr_t *bp, int copies, |
480 | boolean_t nopwrite); | |
34dc7c2f | 481 | |
428870ff | 482 | extern void zio_free(spa_t *spa, uint64_t txg, const blkptr_t *bp); |
34dc7c2f | 483 | |
428870ff BB |
484 | extern zio_t *zio_claim(zio_t *pio, spa_t *spa, uint64_t txg, |
485 | const blkptr_t *bp, | |
486 | zio_done_func_t *done, void *private, enum zio_flag flags); | |
34dc7c2f BB |
487 | |
488 | extern zio_t *zio_ioctl(zio_t *pio, spa_t *spa, vdev_t *vd, int cmd, | |
e8b96c60 | 489 | zio_done_func_t *done, void *private, enum zio_flag flags); |
34dc7c2f BB |
490 | |
491 | extern zio_t *zio_read_phys(zio_t *pio, vdev_t *vd, uint64_t offset, | |
492 | uint64_t size, void *data, int checksum, | |
e8b96c60 MA |
493 | zio_done_func_t *done, void *private, zio_priority_t priority, |
494 | enum zio_flag flags, boolean_t labels); | |
34dc7c2f BB |
495 | |
496 | extern zio_t *zio_write_phys(zio_t *pio, vdev_t *vd, uint64_t offset, | |
497 | uint64_t size, void *data, int checksum, | |
e8b96c60 MA |
498 | zio_done_func_t *done, void *private, zio_priority_t priority, |
499 | enum zio_flag flags, boolean_t labels); | |
34dc7c2f | 500 | |
428870ff BB |
501 | extern zio_t *zio_free_sync(zio_t *pio, spa_t *spa, uint64_t txg, |
502 | const blkptr_t *bp, enum zio_flag flags); | |
503 | ||
504 | extern int zio_alloc_zil(spa_t *spa, uint64_t txg, blkptr_t *new_bp, | |
920dd524 | 505 | uint64_t size, boolean_t use_slog); |
428870ff | 506 | extern void zio_free_zil(spa_t *spa, uint64_t txg, blkptr_t *bp); |
34dc7c2f | 507 | extern void zio_flush(zio_t *zio, vdev_t *vd); |
428870ff | 508 | extern void zio_shrink(zio_t *zio, uint64_t size); |
34dc7c2f BB |
509 | |
510 | extern int zio_wait(zio_t *zio); | |
511 | extern void zio_nowait(zio_t *zio); | |
512 | extern void zio_execute(zio_t *zio); | |
513 | extern void zio_interrupt(zio_t *zio); | |
26ef0cc7 TH |
514 | extern void zio_delay_init(zio_t *zio); |
515 | extern void zio_delay_interrupt(zio_t *zio); | |
34dc7c2f | 516 | |
d164b209 BB |
517 | extern zio_t *zio_walk_parents(zio_t *cio); |
518 | extern zio_t *zio_walk_children(zio_t *pio); | |
519 | extern zio_t *zio_unique_parent(zio_t *cio); | |
520 | extern void zio_add_child(zio_t *pio, zio_t *cio); | |
521 | ||
34dc7c2f BB |
522 | extern void *zio_buf_alloc(size_t size); |
523 | extern void zio_buf_free(void *buf, size_t size); | |
524 | extern void *zio_data_buf_alloc(size_t size); | |
525 | extern void zio_data_buf_free(void *buf, size_t size); | |
6fe53787 | 526 | extern void *zio_buf_alloc_flags(size_t size, int flags); |
34dc7c2f BB |
527 | |
528 | extern void zio_resubmit_stage_async(void *); | |
529 | ||
34dc7c2f | 530 | extern zio_t *zio_vdev_child_io(zio_t *zio, blkptr_t *bp, vdev_t *vd, |
e8b96c60 MA |
531 | uint64_t offset, void *data, uint64_t size, int type, |
532 | zio_priority_t priority, enum zio_flag flags, | |
533 | zio_done_func_t *done, void *private); | |
34dc7c2f | 534 | |
b128c09f | 535 | extern zio_t *zio_vdev_delegated_io(vdev_t *vd, uint64_t offset, |
e8b96c60 | 536 | void *data, uint64_t size, int type, zio_priority_t priority, |
428870ff | 537 | enum zio_flag flags, zio_done_func_t *done, void *private); |
b128c09f | 538 | |
34dc7c2f BB |
539 | extern void zio_vdev_io_bypass(zio_t *zio); |
540 | extern void zio_vdev_io_reissue(zio_t *zio); | |
541 | extern void zio_vdev_io_redone(zio_t *zio); | |
542 | ||
543 | extern void zio_checksum_verified(zio_t *zio); | |
b128c09f | 544 | extern int zio_worst_error(int e1, int e2); |
34dc7c2f | 545 | |
428870ff BB |
546 | extern enum zio_checksum zio_checksum_select(enum zio_checksum child, |
547 | enum zio_checksum parent); | |
548 | extern enum zio_checksum zio_checksum_dedup_select(spa_t *spa, | |
549 | enum zio_checksum child, enum zio_checksum parent); | |
99197f03 JG |
550 | extern enum zio_compress zio_compress_select(spa_t *spa, |
551 | enum zio_compress child, enum zio_compress parent); | |
34dc7c2f | 552 | |
b128c09f | 553 | extern void zio_suspend(spa_t *spa, zio_t *zio); |
9babb374 | 554 | extern int zio_resume(spa_t *spa); |
b128c09f | 555 | extern void zio_resume_wait(spa_t *spa); |
34dc7c2f BB |
556 | |
557 | /* | |
558 | * Initial setup and teardown. | |
559 | */ | |
560 | extern void zio_init(void); | |
561 | extern void zio_fini(void); | |
562 | ||
563 | /* | |
564 | * Fault injection | |
565 | */ | |
566 | struct zinject_record; | |
567 | extern uint32_t zio_injection_enabled; | |
568 | extern int zio_inject_fault(char *name, int flags, int *id, | |
569 | struct zinject_record *record); | |
570 | extern int zio_inject_list_next(int *id, char *name, size_t buflen, | |
571 | struct zinject_record *record); | |
572 | extern int zio_clear_fault(int id); | |
428870ff | 573 | extern void zio_handle_panic_injection(spa_t *spa, char *tag, uint64_t type); |
34dc7c2f | 574 | extern int zio_handle_fault_injection(zio_t *zio, int error); |
9babb374 | 575 | extern int zio_handle_device_injection(vdev_t *vd, zio_t *zio, int error); |
b128c09f | 576 | extern int zio_handle_label_injection(zio_t *zio, int error); |
428870ff | 577 | extern void zio_handle_ignored_writes(zio_t *zio); |
26ef0cc7 | 578 | extern hrtime_t zio_handle_io_delay(zio_t *zio); |
428870ff BB |
579 | |
580 | /* | |
581 | * Checksum ereport functions | |
582 | */ | |
583 | extern void zfs_ereport_start_checksum(spa_t *spa, vdev_t *vd, struct zio *zio, | |
584 | uint64_t offset, uint64_t length, void *arg, struct zio_bad_cksum *info); | |
585 | extern void zfs_ereport_finish_checksum(zio_cksum_report_t *report, | |
586 | const void *good_data, const void *bad_data, boolean_t drop_if_identical); | |
587 | ||
588 | extern void zfs_ereport_send_interim_checksum(zio_cksum_report_t *report); | |
589 | extern void zfs_ereport_free_checksum(zio_cksum_report_t *report); | |
590 | ||
591 | /* If we have the good data in hand, this function can be used */ | |
592 | extern void zfs_ereport_post_checksum(spa_t *spa, vdev_t *vd, | |
593 | struct zio *zio, uint64_t offset, uint64_t length, | |
594 | const void *good_data, const void *bad_data, struct zio_bad_cksum *info); | |
595 | ||
596 | /* Called from spa_sync(), but primarily an injection handler */ | |
597 | extern void spa_handle_ignored_writes(spa_t *spa); | |
34dc7c2f | 598 | |
5dbd68a3 | 599 | /* zbookmark_phys functions */ |
fcff0f35 PD |
600 | boolean_t zbookmark_subtree_completed(const struct dnode_phys *dnp, |
601 | const zbookmark_phys_t *subtree_root, const zbookmark_phys_t *last_block); | |
602 | int zbookmark_compare(uint16_t dbss1, uint8_t ibs1, uint16_t dbss2, | |
603 | uint8_t ibs2, const zbookmark_phys_t *zb1, const zbookmark_phys_t *zb2); | |
9ae529ec | 604 | |
34dc7c2f BB |
605 | #ifdef __cplusplus |
606 | } | |
607 | #endif | |
608 | ||
609 | #endif /* _ZIO_H */ |