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70e083d2 TG |
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 | /* | |
23 | * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. | |
24 | * Copyright 2011 Nexenta Systems, Inc. All rights reserved. | |
86e3c28a | 25 | * Copyright (c) 2012, 2017 by Delphix. All rights reserved. |
70e083d2 | 26 | * Copyright (c) 2013 by Saso Kiselkov. All rights reserved. |
86e3c28a CIK |
27 | * Copyright (c) 2013, Joyent, Inc. All rights reserved. |
28 | * Copyright 2016 Toomas Soome <tsoome@me.com> | |
70e083d2 TG |
29 | */ |
30 | ||
31 | #ifndef _ZIO_H | |
32 | #define _ZIO_H | |
33 | ||
86e3c28a | 34 | #include <sys/zio_priority.h> |
70e083d2 TG |
35 | #include <sys/zfs_context.h> |
36 | #include <sys/spa.h> | |
37 | #include <sys/txg.h> | |
38 | #include <sys/avl.h> | |
39 | #include <sys/fs/zfs.h> | |
40 | #include <sys/zio_impl.h> | |
41 | ||
42 | #ifdef __cplusplus | |
43 | extern "C" { | |
44 | #endif | |
45 | ||
46 | /* | |
47 | * Embedded checksum | |
48 | */ | |
49 | #define ZEC_MAGIC 0x210da7ab10c7a11ULL | |
50 | ||
51 | typedef struct zio_eck { | |
52 | uint64_t zec_magic; /* for validation, endianness */ | |
53 | zio_cksum_t zec_cksum; /* 256-bit checksum */ | |
54 | } zio_eck_t; | |
55 | ||
56 | /* | |
57 | * Gang block headers are self-checksumming and contain an array | |
58 | * of block pointers. | |
59 | */ | |
60 | #define SPA_GANGBLOCKSIZE SPA_MINBLOCKSIZE | |
61 | #define SPA_GBH_NBLKPTRS ((SPA_GANGBLOCKSIZE - \ | |
62 | sizeof (zio_eck_t)) / sizeof (blkptr_t)) | |
63 | #define SPA_GBH_FILLER ((SPA_GANGBLOCKSIZE - \ | |
64 | sizeof (zio_eck_t) - \ | |
65 | (SPA_GBH_NBLKPTRS * sizeof (blkptr_t))) /\ | |
66 | sizeof (uint64_t)) | |
67 | ||
68 | typedef struct zio_gbh { | |
69 | blkptr_t zg_blkptr[SPA_GBH_NBLKPTRS]; | |
70 | uint64_t zg_filler[SPA_GBH_FILLER]; | |
71 | zio_eck_t zg_tail; | |
72 | } zio_gbh_phys_t; | |
73 | ||
74 | enum zio_checksum { | |
75 | ZIO_CHECKSUM_INHERIT = 0, | |
76 | ZIO_CHECKSUM_ON, | |
77 | ZIO_CHECKSUM_OFF, | |
78 | ZIO_CHECKSUM_LABEL, | |
79 | ZIO_CHECKSUM_GANG_HEADER, | |
80 | ZIO_CHECKSUM_ZILOG, | |
81 | ZIO_CHECKSUM_FLETCHER_2, | |
82 | ZIO_CHECKSUM_FLETCHER_4, | |
83 | ZIO_CHECKSUM_SHA256, | |
84 | ZIO_CHECKSUM_ZILOG2, | |
86e3c28a CIK |
85 | ZIO_CHECKSUM_NOPARITY, |
86 | ZIO_CHECKSUM_SHA512, | |
87 | ZIO_CHECKSUM_SKEIN, | |
88 | ZIO_CHECKSUM_EDONR, | |
70e083d2 TG |
89 | ZIO_CHECKSUM_FUNCTIONS |
90 | }; | |
91 | ||
92 | /* | |
93 | * The number of "legacy" compression functions which can be set on individual | |
94 | * objects. | |
95 | */ | |
96 | #define ZIO_CHECKSUM_LEGACY_FUNCTIONS ZIO_CHECKSUM_ZILOG2 | |
97 | ||
98 | #define ZIO_CHECKSUM_ON_VALUE ZIO_CHECKSUM_FLETCHER_4 | |
99 | #define ZIO_CHECKSUM_DEFAULT ZIO_CHECKSUM_ON | |
100 | ||
101 | #define ZIO_CHECKSUM_MASK 0xffULL | |
102 | #define ZIO_CHECKSUM_VERIFY (1 << 8) | |
103 | ||
104 | #define ZIO_DEDUPCHECKSUM ZIO_CHECKSUM_SHA256 | |
105 | #define ZIO_DEDUPDITTO_MIN 100 | |
106 | ||
70e083d2 TG |
107 | /* |
108 | * The number of "legacy" compression functions which can be set on individual | |
109 | * objects. | |
110 | */ | |
111 | #define ZIO_COMPRESS_LEGACY_FUNCTIONS ZIO_COMPRESS_LZ4 | |
112 | ||
113 | /* | |
114 | * The meaning of "compress = on" selected by the compression features enabled | |
115 | * on a given pool. | |
116 | */ | |
117 | #define ZIO_COMPRESS_LEGACY_ON_VALUE ZIO_COMPRESS_LZJB | |
118 | #define ZIO_COMPRESS_LZ4_ON_VALUE ZIO_COMPRESS_LZ4 | |
119 | ||
120 | #define ZIO_COMPRESS_DEFAULT ZIO_COMPRESS_OFF | |
121 | ||
122 | #define BOOTFS_COMPRESS_VALID(compress) \ | |
123 | ((compress) == ZIO_COMPRESS_LZJB || \ | |
124 | (compress) == ZIO_COMPRESS_LZ4 || \ | |
86e3c28a CIK |
125 | (compress) == ZIO_COMPRESS_GZIP_1 || \ |
126 | (compress) == ZIO_COMPRESS_GZIP_2 || \ | |
127 | (compress) == ZIO_COMPRESS_GZIP_3 || \ | |
128 | (compress) == ZIO_COMPRESS_GZIP_4 || \ | |
129 | (compress) == ZIO_COMPRESS_GZIP_5 || \ | |
130 | (compress) == ZIO_COMPRESS_GZIP_6 || \ | |
131 | (compress) == ZIO_COMPRESS_GZIP_7 || \ | |
132 | (compress) == ZIO_COMPRESS_GZIP_8 || \ | |
133 | (compress) == ZIO_COMPRESS_GZIP_9 || \ | |
134 | (compress) == ZIO_COMPRESS_ZLE || \ | |
70e083d2 TG |
135 | (compress) == ZIO_COMPRESS_ON || \ |
136 | (compress) == ZIO_COMPRESS_OFF) | |
137 | ||
138 | /* | |
139 | * Default Linux timeout for a sd device. | |
140 | */ | |
141 | #define ZIO_DELAY_MAX (30 * MILLISEC) | |
142 | ||
143 | #define ZIO_FAILURE_MODE_WAIT 0 | |
144 | #define ZIO_FAILURE_MODE_CONTINUE 1 | |
145 | #define ZIO_FAILURE_MODE_PANIC 2 | |
146 | ||
70e083d2 TG |
147 | enum zio_flag { |
148 | /* | |
149 | * Flags inherited by gang, ddt, and vdev children, | |
150 | * and that must be equal for two zios to aggregate | |
151 | */ | |
152 | ZIO_FLAG_DONT_AGGREGATE = 1 << 0, | |
153 | ZIO_FLAG_IO_REPAIR = 1 << 1, | |
154 | ZIO_FLAG_SELF_HEAL = 1 << 2, | |
155 | ZIO_FLAG_RESILVER = 1 << 3, | |
156 | ZIO_FLAG_SCRUB = 1 << 4, | |
157 | ZIO_FLAG_SCAN_THREAD = 1 << 5, | |
158 | ZIO_FLAG_PHYSICAL = 1 << 6, | |
159 | ||
160 | #define ZIO_FLAG_AGG_INHERIT (ZIO_FLAG_CANFAIL - 1) | |
161 | ||
162 | /* | |
163 | * Flags inherited by ddt, gang, and vdev children. | |
164 | */ | |
165 | ZIO_FLAG_CANFAIL = 1 << 7, /* must be first for INHERIT */ | |
166 | ZIO_FLAG_SPECULATIVE = 1 << 8, | |
167 | ZIO_FLAG_CONFIG_WRITER = 1 << 9, | |
168 | ZIO_FLAG_DONT_RETRY = 1 << 10, | |
169 | ZIO_FLAG_DONT_CACHE = 1 << 11, | |
170 | ZIO_FLAG_NODATA = 1 << 12, | |
171 | ZIO_FLAG_INDUCE_DAMAGE = 1 << 13, | |
86e3c28a | 172 | ZIO_FLAG_IO_ALLOCATING = 1 << 14, |
70e083d2 TG |
173 | |
174 | #define ZIO_FLAG_DDT_INHERIT (ZIO_FLAG_IO_RETRY - 1) | |
175 | #define ZIO_FLAG_GANG_INHERIT (ZIO_FLAG_IO_RETRY - 1) | |
176 | ||
177 | /* | |
178 | * Flags inherited by vdev children. | |
179 | */ | |
86e3c28a CIK |
180 | ZIO_FLAG_IO_RETRY = 1 << 15, /* must be first for INHERIT */ |
181 | ZIO_FLAG_PROBE = 1 << 16, | |
182 | ZIO_FLAG_TRYHARD = 1 << 17, | |
183 | ZIO_FLAG_OPTIONAL = 1 << 18, | |
70e083d2 TG |
184 | |
185 | #define ZIO_FLAG_VDEV_INHERIT (ZIO_FLAG_DONT_QUEUE - 1) | |
186 | ||
187 | /* | |
188 | * Flags not inherited by any children. | |
189 | */ | |
86e3c28a CIK |
190 | ZIO_FLAG_DONT_QUEUE = 1 << 19, /* must be first for INHERIT */ |
191 | ZIO_FLAG_DONT_PROPAGATE = 1 << 20, | |
192 | ZIO_FLAG_IO_BYPASS = 1 << 21, | |
193 | ZIO_FLAG_IO_REWRITE = 1 << 22, | |
194 | ZIO_FLAG_RAW = 1 << 23, | |
195 | ZIO_FLAG_GANG_CHILD = 1 << 24, | |
196 | ZIO_FLAG_DDT_CHILD = 1 << 25, | |
197 | ZIO_FLAG_GODFATHER = 1 << 26, | |
198 | ZIO_FLAG_NOPWRITE = 1 << 27, | |
199 | ZIO_FLAG_REEXECUTED = 1 << 28, | |
200 | ZIO_FLAG_DELEGATED = 1 << 29, | |
201 | ZIO_FLAG_FASTWRITE = 1 << 30 | |
70e083d2 TG |
202 | }; |
203 | ||
204 | #define ZIO_FLAG_MUSTSUCCEED 0 | |
205 | ||
206 | #define ZIO_DDT_CHILD_FLAGS(zio) \ | |
207 | (((zio)->io_flags & ZIO_FLAG_DDT_INHERIT) | \ | |
208 | ZIO_FLAG_DDT_CHILD | ZIO_FLAG_CANFAIL) | |
209 | ||
210 | #define ZIO_GANG_CHILD_FLAGS(zio) \ | |
211 | (((zio)->io_flags & ZIO_FLAG_GANG_INHERIT) | \ | |
212 | ZIO_FLAG_GANG_CHILD | ZIO_FLAG_CANFAIL) | |
213 | ||
214 | #define ZIO_VDEV_CHILD_FLAGS(zio) \ | |
215 | (((zio)->io_flags & ZIO_FLAG_VDEV_INHERIT) | \ | |
216 | ZIO_FLAG_CANFAIL) | |
217 | ||
218 | enum zio_child { | |
219 | ZIO_CHILD_VDEV = 0, | |
220 | ZIO_CHILD_GANG, | |
221 | ZIO_CHILD_DDT, | |
222 | ZIO_CHILD_LOGICAL, | |
223 | ZIO_CHILD_TYPES | |
224 | }; | |
225 | ||
226 | enum zio_wait_type { | |
227 | ZIO_WAIT_READY = 0, | |
228 | ZIO_WAIT_DONE, | |
229 | ZIO_WAIT_TYPES | |
230 | }; | |
231 | ||
232 | /* | |
233 | * We'll take the unused errnos, 'EBADE' and 'EBADR' (from the Convergent | |
234 | * graveyard) to indicate checksum errors and fragmentation. | |
235 | */ | |
236 | #define ECKSUM EBADE | |
237 | #define EFRAGS EBADR | |
238 | ||
239 | typedef void zio_done_func_t(zio_t *zio); | |
240 | ||
86e3c28a | 241 | extern int zio_dva_throttle_enabled; |
70e083d2 TG |
242 | extern const char *zio_type_name[ZIO_TYPES]; |
243 | ||
244 | /* | |
245 | * A bookmark is a four-tuple <objset, object, level, blkid> that uniquely | |
246 | * identifies any block in the pool. By convention, the meta-objset (MOS) | |
247 | * is objset 0, and the meta-dnode is object 0. This covers all blocks | |
248 | * except root blocks and ZIL blocks, which are defined as follows: | |
249 | * | |
250 | * Root blocks (objset_phys_t) are object 0, level -1: <objset, 0, -1, 0>. | |
251 | * ZIL blocks are bookmarked <objset, 0, -2, blkid == ZIL sequence number>. | |
252 | * dmu_sync()ed ZIL data blocks are bookmarked <objset, object, -2, blkid>. | |
86e3c28a | 253 | * dnode visit bookmarks are <objset, object id of dnode, -3, 0>. |
70e083d2 TG |
254 | * |
255 | * Note: this structure is called a bookmark because its original purpose | |
256 | * was to remember where to resume a pool-wide traverse. | |
257 | * | |
258 | * Note: this structure is passed between userland and the kernel, and is | |
259 | * stored on disk (by virtue of being incorporated into other on-disk | |
260 | * structures, e.g. dsl_scan_phys_t). | |
261 | */ | |
262 | struct zbookmark_phys { | |
263 | uint64_t zb_objset; | |
264 | uint64_t zb_object; | |
265 | int64_t zb_level; | |
266 | uint64_t zb_blkid; | |
267 | }; | |
268 | ||
269 | #define SET_BOOKMARK(zb, objset, object, level, blkid) \ | |
270 | { \ | |
271 | (zb)->zb_objset = objset; \ | |
272 | (zb)->zb_object = object; \ | |
273 | (zb)->zb_level = level; \ | |
274 | (zb)->zb_blkid = blkid; \ | |
275 | } | |
276 | ||
277 | #define ZB_DESTROYED_OBJSET (-1ULL) | |
278 | ||
279 | #define ZB_ROOT_OBJECT (0ULL) | |
280 | #define ZB_ROOT_LEVEL (-1LL) | |
281 | #define ZB_ROOT_BLKID (0ULL) | |
282 | ||
283 | #define ZB_ZIL_OBJECT (0ULL) | |
284 | #define ZB_ZIL_LEVEL (-2LL) | |
285 | ||
86e3c28a CIK |
286 | #define ZB_DNODE_LEVEL (-3LL) |
287 | #define ZB_DNODE_BLKID (0ULL) | |
288 | ||
70e083d2 TG |
289 | #define ZB_IS_ZERO(zb) \ |
290 | ((zb)->zb_objset == 0 && (zb)->zb_object == 0 && \ | |
291 | (zb)->zb_level == 0 && (zb)->zb_blkid == 0) | |
292 | #define ZB_IS_ROOT(zb) \ | |
293 | ((zb)->zb_object == ZB_ROOT_OBJECT && \ | |
294 | (zb)->zb_level == ZB_ROOT_LEVEL && \ | |
295 | (zb)->zb_blkid == ZB_ROOT_BLKID) | |
296 | ||
297 | typedef struct zio_prop { | |
298 | enum zio_checksum zp_checksum; | |
299 | enum zio_compress zp_compress; | |
300 | dmu_object_type_t zp_type; | |
301 | uint8_t zp_level; | |
302 | uint8_t zp_copies; | |
303 | boolean_t zp_dedup; | |
304 | boolean_t zp_dedup_verify; | |
305 | boolean_t zp_nopwrite; | |
306 | } zio_prop_t; | |
307 | ||
308 | typedef struct zio_cksum_report zio_cksum_report_t; | |
309 | ||
310 | typedef void zio_cksum_finish_f(zio_cksum_report_t *rep, | |
86e3c28a | 311 | const abd_t *good_data); |
70e083d2 TG |
312 | typedef void zio_cksum_free_f(void *cbdata, size_t size); |
313 | ||
314 | struct zio_bad_cksum; /* defined in zio_checksum.h */ | |
315 | struct dnode_phys; | |
86e3c28a | 316 | struct abd; |
70e083d2 TG |
317 | |
318 | struct zio_cksum_report { | |
319 | struct zio_cksum_report *zcr_next; | |
320 | nvlist_t *zcr_ereport; | |
321 | nvlist_t *zcr_detector; | |
322 | void *zcr_cbdata; | |
323 | size_t zcr_cbinfo; /* passed to zcr_free() */ | |
324 | uint64_t zcr_align; | |
325 | uint64_t zcr_length; | |
326 | zio_cksum_finish_f *zcr_finish; | |
327 | zio_cksum_free_f *zcr_free; | |
328 | ||
329 | /* internal use only */ | |
330 | struct zio_bad_cksum *zcr_ckinfo; /* information from failure */ | |
331 | }; | |
332 | ||
333 | typedef void zio_vsd_cksum_report_f(zio_t *zio, zio_cksum_report_t *zcr, | |
334 | void *arg); | |
335 | ||
336 | zio_vsd_cksum_report_f zio_vsd_default_cksum_report; | |
337 | ||
338 | typedef struct zio_vsd_ops { | |
339 | zio_done_func_t *vsd_free; | |
340 | zio_vsd_cksum_report_f *vsd_cksum_report; | |
341 | } zio_vsd_ops_t; | |
342 | ||
343 | typedef struct zio_gang_node { | |
344 | zio_gbh_phys_t *gn_gbh; | |
345 | struct zio_gang_node *gn_child[SPA_GBH_NBLKPTRS]; | |
346 | } zio_gang_node_t; | |
347 | ||
348 | typedef zio_t *zio_gang_issue_func_t(zio_t *zio, blkptr_t *bp, | |
86e3c28a | 349 | zio_gang_node_t *gn, struct abd *data, uint64_t offset); |
70e083d2 | 350 | |
86e3c28a | 351 | typedef void zio_transform_func_t(zio_t *zio, struct abd *data, uint64_t size); |
70e083d2 TG |
352 | |
353 | typedef struct zio_transform { | |
86e3c28a | 354 | struct abd *zt_orig_abd; |
70e083d2 TG |
355 | uint64_t zt_orig_size; |
356 | uint64_t zt_bufsize; | |
357 | zio_transform_func_t *zt_transform; | |
358 | struct zio_transform *zt_next; | |
359 | } zio_transform_t; | |
360 | ||
361 | typedef int zio_pipe_stage_t(zio_t *zio); | |
362 | ||
363 | /* | |
364 | * The io_reexecute flags are distinct from io_flags because the child must | |
365 | * be able to propagate them to the parent. The normal io_flags are local | |
366 | * to the zio, not protected by any lock, and not modifiable by children; | |
367 | * the reexecute flags are protected by io_lock, modifiable by children, | |
368 | * and always propagated -- even when ZIO_FLAG_DONT_PROPAGATE is set. | |
369 | */ | |
370 | #define ZIO_REEXECUTE_NOW 0x01 | |
371 | #define ZIO_REEXECUTE_SUSPEND 0x02 | |
372 | ||
86e3c28a CIK |
373 | typedef struct zio_alloc_list { |
374 | list_t zal_list; | |
375 | uint64_t zal_size; | |
376 | } zio_alloc_list_t; | |
377 | ||
70e083d2 TG |
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 | ||
385 | struct zio { | |
386 | /* Core information about this I/O */ | |
387 | zbookmark_phys_t io_bookmark; | |
388 | zio_prop_t io_prop; | |
389 | zio_type_t io_type; | |
390 | enum zio_child io_child_type; | |
391 | int io_cmd; | |
392 | zio_priority_t io_priority; | |
393 | uint8_t io_reexecute; | |
394 | uint8_t io_state[ZIO_WAIT_TYPES]; | |
395 | uint64_t io_txg; | |
396 | spa_t *io_spa; | |
397 | blkptr_t *io_bp; | |
398 | blkptr_t *io_bp_override; | |
399 | blkptr_t io_bp_copy; | |
400 | list_t io_parent_list; | |
401 | list_t io_child_list; | |
70e083d2 TG |
402 | zio_t *io_logical; |
403 | zio_transform_t *io_transform_stack; | |
404 | ||
405 | /* Callback info */ | |
86e3c28a CIK |
406 | zio_done_func_t *io_ready; |
407 | zio_done_func_t *io_children_ready; | |
70e083d2 TG |
408 | zio_done_func_t *io_physdone; |
409 | zio_done_func_t *io_done; | |
410 | void *io_private; | |
411 | int64_t io_prev_space_delta; /* DMU private */ | |
412 | blkptr_t io_bp_orig; | |
86e3c28a CIK |
413 | /* io_lsize != io_orig_size iff this is a raw write */ |
414 | uint64_t io_lsize; | |
70e083d2 TG |
415 | |
416 | /* Data represented by this I/O */ | |
86e3c28a CIK |
417 | struct abd *io_abd; |
418 | struct abd *io_orig_abd; | |
70e083d2 TG |
419 | uint64_t io_size; |
420 | uint64_t io_orig_size; | |
421 | ||
422 | /* Stuff for the vdev stack */ | |
423 | vdev_t *io_vd; | |
424 | void *io_vsd; | |
425 | const zio_vsd_ops_t *io_vsd_ops; | |
426 | ||
427 | uint64_t io_offset; | |
428 | hrtime_t io_timestamp; /* submitted at */ | |
86e3c28a CIK |
429 | hrtime_t io_queued_timestamp; |
430 | hrtime_t io_target_timestamp; | |
70e083d2 | 431 | hrtime_t io_delta; /* vdev queue service delta */ |
86e3c28a CIK |
432 | hrtime_t io_delay; /* Device access time (disk or */ |
433 | /* file). */ | |
70e083d2 TG |
434 | avl_node_t io_queue_node; |
435 | avl_node_t io_offset_node; | |
86e3c28a CIK |
436 | avl_node_t io_alloc_node; |
437 | zio_alloc_list_t io_alloc_list; | |
70e083d2 TG |
438 | |
439 | /* Internal pipeline state */ | |
440 | enum zio_flag io_flags; | |
441 | enum zio_stage io_stage; | |
442 | enum zio_stage io_pipeline; | |
443 | enum zio_flag io_orig_flags; | |
444 | enum zio_stage io_orig_stage; | |
445 | enum zio_stage io_orig_pipeline; | |
86e3c28a | 446 | enum zio_stage io_pipeline_trace; |
70e083d2 TG |
447 | int io_error; |
448 | int io_child_error[ZIO_CHILD_TYPES]; | |
449 | uint64_t io_children[ZIO_CHILD_TYPES][ZIO_WAIT_TYPES]; | |
450 | uint64_t io_child_count; | |
451 | uint64_t io_phys_children; | |
452 | uint64_t io_parent_count; | |
453 | uint64_t *io_stall; | |
454 | zio_t *io_gang_leader; | |
455 | zio_gang_node_t *io_gang_tree; | |
456 | void *io_executor; | |
457 | void *io_waiter; | |
458 | kmutex_t io_lock; | |
459 | kcondvar_t io_cv; | |
460 | ||
461 | /* FMA state */ | |
462 | zio_cksum_report_t *io_cksum_report; | |
463 | uint64_t io_ena; | |
464 | ||
465 | /* Taskq dispatching state */ | |
466 | taskq_ent_t io_tqent; | |
467 | }; | |
468 | ||
86e3c28a CIK |
469 | extern int zio_bookmark_compare(const void *, const void *); |
470 | ||
70e083d2 TG |
471 | extern zio_t *zio_null(zio_t *pio, spa_t *spa, vdev_t *vd, |
472 | zio_done_func_t *done, void *private, enum zio_flag flags); | |
473 | ||
474 | extern zio_t *zio_root(spa_t *spa, | |
475 | zio_done_func_t *done, void *private, enum zio_flag flags); | |
476 | ||
86e3c28a CIK |
477 | extern zio_t *zio_read(zio_t *pio, spa_t *spa, const blkptr_t *bp, |
478 | struct abd *data, uint64_t lsize, zio_done_func_t *done, void *private, | |
70e083d2 TG |
479 | zio_priority_t priority, enum zio_flag flags, const zbookmark_phys_t *zb); |
480 | ||
481 | extern zio_t *zio_write(zio_t *pio, spa_t *spa, uint64_t txg, blkptr_t *bp, | |
86e3c28a CIK |
482 | struct abd *data, uint64_t size, uint64_t psize, const zio_prop_t *zp, |
483 | zio_done_func_t *ready, zio_done_func_t *children_ready, | |
484 | zio_done_func_t *physdone, zio_done_func_t *done, | |
485 | void *private, zio_priority_t priority, enum zio_flag flags, | |
486 | const zbookmark_phys_t *zb); | |
70e083d2 TG |
487 | |
488 | extern zio_t *zio_rewrite(zio_t *pio, spa_t *spa, uint64_t txg, blkptr_t *bp, | |
86e3c28a | 489 | struct abd *data, uint64_t size, zio_done_func_t *done, void *private, |
70e083d2 TG |
490 | zio_priority_t priority, enum zio_flag flags, zbookmark_phys_t *zb); |
491 | ||
492 | extern void zio_write_override(zio_t *zio, blkptr_t *bp, int copies, | |
493 | boolean_t nopwrite); | |
494 | ||
495 | extern void zio_free(spa_t *spa, uint64_t txg, const blkptr_t *bp); | |
496 | ||
497 | extern zio_t *zio_claim(zio_t *pio, spa_t *spa, uint64_t txg, | |
498 | const blkptr_t *bp, | |
499 | zio_done_func_t *done, void *private, enum zio_flag flags); | |
500 | ||
501 | extern zio_t *zio_ioctl(zio_t *pio, spa_t *spa, vdev_t *vd, int cmd, | |
502 | zio_done_func_t *done, void *private, enum zio_flag flags); | |
503 | ||
504 | extern zio_t *zio_read_phys(zio_t *pio, vdev_t *vd, uint64_t offset, | |
86e3c28a | 505 | uint64_t size, struct abd *data, int checksum, |
70e083d2 TG |
506 | zio_done_func_t *done, void *private, zio_priority_t priority, |
507 | enum zio_flag flags, boolean_t labels); | |
508 | ||
509 | extern zio_t *zio_write_phys(zio_t *pio, vdev_t *vd, uint64_t offset, | |
86e3c28a | 510 | uint64_t size, struct abd *data, int checksum, |
70e083d2 TG |
511 | zio_done_func_t *done, void *private, zio_priority_t priority, |
512 | enum zio_flag flags, boolean_t labels); | |
513 | ||
514 | extern zio_t *zio_free_sync(zio_t *pio, spa_t *spa, uint64_t txg, | |
515 | const blkptr_t *bp, enum zio_flag flags); | |
516 | ||
517 | extern int zio_alloc_zil(spa_t *spa, uint64_t txg, blkptr_t *new_bp, | |
86e3c28a | 518 | uint64_t size, boolean_t *slog); |
70e083d2 TG |
519 | extern void zio_free_zil(spa_t *spa, uint64_t txg, blkptr_t *bp); |
520 | extern void zio_flush(zio_t *zio, vdev_t *vd); | |
521 | extern void zio_shrink(zio_t *zio, uint64_t size); | |
522 | ||
523 | extern int zio_wait(zio_t *zio); | |
524 | extern void zio_nowait(zio_t *zio); | |
525 | extern void zio_execute(zio_t *zio); | |
526 | extern void zio_interrupt(zio_t *zio); | |
86e3c28a CIK |
527 | extern void zio_delay_init(zio_t *zio); |
528 | extern void zio_delay_interrupt(zio_t *zio); | |
70e083d2 | 529 | |
86e3c28a CIK |
530 | extern zio_t *zio_walk_parents(zio_t *cio, zio_link_t **); |
531 | extern zio_t *zio_walk_children(zio_t *pio, zio_link_t **); | |
70e083d2 TG |
532 | extern zio_t *zio_unique_parent(zio_t *cio); |
533 | extern void zio_add_child(zio_t *pio, zio_t *cio); | |
534 | ||
535 | extern void *zio_buf_alloc(size_t size); | |
536 | extern void zio_buf_free(void *buf, size_t size); | |
537 | extern void *zio_data_buf_alloc(size_t size); | |
538 | extern void zio_data_buf_free(void *buf, size_t size); | |
86e3c28a CIK |
539 | |
540 | extern void zio_push_transform(zio_t *zio, struct abd *abd, uint64_t size, | |
541 | uint64_t bufsize, zio_transform_func_t *transform); | |
542 | extern void zio_pop_transforms(zio_t *zio); | |
70e083d2 TG |
543 | |
544 | extern void zio_resubmit_stage_async(void *); | |
545 | ||
546 | extern zio_t *zio_vdev_child_io(zio_t *zio, blkptr_t *bp, vdev_t *vd, | |
86e3c28a | 547 | uint64_t offset, struct abd *data, uint64_t size, int type, |
70e083d2 TG |
548 | zio_priority_t priority, enum zio_flag flags, |
549 | zio_done_func_t *done, void *private); | |
550 | ||
551 | extern zio_t *zio_vdev_delegated_io(vdev_t *vd, uint64_t offset, | |
86e3c28a | 552 | struct abd *data, uint64_t size, int type, zio_priority_t priority, |
70e083d2 TG |
553 | enum zio_flag flags, zio_done_func_t *done, void *private); |
554 | ||
555 | extern void zio_vdev_io_bypass(zio_t *zio); | |
556 | extern void zio_vdev_io_reissue(zio_t *zio); | |
557 | extern void zio_vdev_io_redone(zio_t *zio); | |
558 | ||
559 | extern void zio_checksum_verified(zio_t *zio); | |
560 | extern int zio_worst_error(int e1, int e2); | |
561 | ||
562 | extern enum zio_checksum zio_checksum_select(enum zio_checksum child, | |
563 | enum zio_checksum parent); | |
564 | extern enum zio_checksum zio_checksum_dedup_select(spa_t *spa, | |
565 | enum zio_checksum child, enum zio_checksum parent); | |
566 | extern enum zio_compress zio_compress_select(spa_t *spa, | |
567 | enum zio_compress child, enum zio_compress parent); | |
568 | ||
569 | extern void zio_suspend(spa_t *spa, zio_t *zio); | |
570 | extern int zio_resume(spa_t *spa); | |
571 | extern void zio_resume_wait(spa_t *spa); | |
572 | ||
573 | /* | |
574 | * Initial setup and teardown. | |
575 | */ | |
576 | extern void zio_init(void); | |
577 | extern void zio_fini(void); | |
578 | ||
579 | /* | |
580 | * Fault injection | |
581 | */ | |
582 | struct zinject_record; | |
583 | extern uint32_t zio_injection_enabled; | |
584 | extern int zio_inject_fault(char *name, int flags, int *id, | |
585 | struct zinject_record *record); | |
586 | extern int zio_inject_list_next(int *id, char *name, size_t buflen, | |
587 | struct zinject_record *record); | |
588 | extern int zio_clear_fault(int id); | |
589 | extern void zio_handle_panic_injection(spa_t *spa, char *tag, uint64_t type); | |
590 | extern int zio_handle_fault_injection(zio_t *zio, int error); | |
591 | extern int zio_handle_device_injection(vdev_t *vd, zio_t *zio, int error); | |
592 | extern int zio_handle_label_injection(zio_t *zio, int error); | |
593 | extern void zio_handle_ignored_writes(zio_t *zio); | |
86e3c28a | 594 | extern hrtime_t zio_handle_io_delay(zio_t *zio); |
70e083d2 TG |
595 | |
596 | /* | |
597 | * Checksum ereport functions | |
598 | */ | |
599 | extern void zfs_ereport_start_checksum(spa_t *spa, vdev_t *vd, struct zio *zio, | |
600 | uint64_t offset, uint64_t length, void *arg, struct zio_bad_cksum *info); | |
601 | extern void zfs_ereport_finish_checksum(zio_cksum_report_t *report, | |
86e3c28a | 602 | const abd_t *good_data, const abd_t *bad_data, boolean_t drop_if_identical); |
70e083d2 | 603 | |
70e083d2 TG |
604 | extern void zfs_ereport_free_checksum(zio_cksum_report_t *report); |
605 | ||
606 | /* If we have the good data in hand, this function can be used */ | |
607 | extern void zfs_ereport_post_checksum(spa_t *spa, vdev_t *vd, | |
608 | struct zio *zio, uint64_t offset, uint64_t length, | |
86e3c28a | 609 | const abd_t *good_data, const abd_t *bad_data, struct zio_bad_cksum *info); |
70e083d2 TG |
610 | |
611 | /* Called from spa_sync(), but primarily an injection handler */ | |
612 | extern void spa_handle_ignored_writes(spa_t *spa); | |
613 | ||
614 | /* zbookmark_phys functions */ | |
86e3c28a CIK |
615 | boolean_t zbookmark_subtree_completed(const struct dnode_phys *dnp, |
616 | const zbookmark_phys_t *subtree_root, const zbookmark_phys_t *last_block); | |
617 | int zbookmark_compare(uint16_t dbss1, uint8_t ibs1, uint16_t dbss2, | |
618 | uint8_t ibs2, const zbookmark_phys_t *zb1, const zbookmark_phys_t *zb2); | |
70e083d2 TG |
619 | |
620 | #ifdef __cplusplus | |
621 | } | |
622 | #endif | |
623 | ||
624 | #endif /* _ZIO_H */ |