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Commit | Line | Data |
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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 | /* | |
428870ff | 22 | * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. |
64fc7762 | 23 | * Copyright (c) 2011, 2017 by Delphix. All rights reserved. |
a38718a6 | 24 | * Copyright (c) 2011 Nexenta Systems, Inc. All rights reserved. |
34dc7c2f BB |
25 | */ |
26 | ||
f1512ee6 | 27 | #include <sys/sysmacros.h> |
34dc7c2f BB |
28 | #include <sys/zfs_context.h> |
29 | #include <sys/fm/fs/zfs.h> | |
30 | #include <sys/spa.h> | |
31 | #include <sys/txg.h> | |
32 | #include <sys/spa_impl.h> | |
33 | #include <sys/vdev_impl.h> | |
34 | #include <sys/zio_impl.h> | |
35 | #include <sys/zio_compress.h> | |
36 | #include <sys/zio_checksum.h> | |
428870ff BB |
37 | #include <sys/dmu_objset.h> |
38 | #include <sys/arc.h> | |
39 | #include <sys/ddt.h> | |
9b67f605 | 40 | #include <sys/blkptr.h> |
b0bc7a84 | 41 | #include <sys/zfeature.h> |
3dfb57a3 | 42 | #include <sys/metaslab_impl.h> |
193a37cb | 43 | #include <sys/time.h> |
26ef0cc7 | 44 | #include <sys/trace_zio.h> |
a6255b7f | 45 | #include <sys/abd.h> |
b5256303 | 46 | #include <sys/dsl_crypt.h> |
34dc7c2f | 47 | |
34dc7c2f BB |
48 | /* |
49 | * ========================================================================== | |
50 | * I/O type descriptions | |
51 | * ========================================================================== | |
52 | */ | |
e8b96c60 | 53 | const char *zio_type_name[ZIO_TYPES] = { |
3dfb57a3 DB |
54 | /* |
55 | * Note: Linux kernel thread name length is limited | |
56 | * so these names will differ from upstream open zfs. | |
57 | */ | |
451041db | 58 | "z_null", "z_rd", "z_wr", "z_fr", "z_cl", "z_ioctl" |
428870ff | 59 | }; |
34dc7c2f | 60 | |
27f2b90d | 61 | int zio_dva_throttle_enabled = B_TRUE; |
3dfb57a3 | 62 | |
34dc7c2f BB |
63 | /* |
64 | * ========================================================================== | |
65 | * I/O kmem caches | |
66 | * ========================================================================== | |
67 | */ | |
68 | kmem_cache_t *zio_cache; | |
d164b209 | 69 | kmem_cache_t *zio_link_cache; |
34dc7c2f BB |
70 | kmem_cache_t *zio_buf_cache[SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT]; |
71 | kmem_cache_t *zio_data_buf_cache[SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT]; | |
a6255b7f DQ |
72 | #if defined(ZFS_DEBUG) && !defined(_KERNEL) |
73 | uint64_t zio_buf_cache_allocs[SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT]; | |
74 | uint64_t zio_buf_cache_frees[SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT]; | |
75 | #endif | |
76 | ||
a69052be | 77 | int zio_delay_max = ZIO_DELAY_MAX; |
34dc7c2f | 78 | |
98b25418 GW |
79 | #define ZIO_PIPELINE_CONTINUE 0x100 |
80 | #define ZIO_PIPELINE_STOP 0x101 | |
81 | ||
fcff0f35 PD |
82 | #define BP_SPANB(indblkshift, level) \ |
83 | (((uint64_t)1) << ((level) * ((indblkshift) - SPA_BLKPTRSHIFT))) | |
84 | #define COMPARE_META_LEVEL 0x80000000ul | |
55d85d5a GW |
85 | /* |
86 | * The following actions directly effect the spa's sync-to-convergence logic. | |
87 | * The values below define the sync pass when we start performing the action. | |
88 | * Care should be taken when changing these values as they directly impact | |
89 | * spa_sync() performance. Tuning these values may introduce subtle performance | |
90 | * pathologies and should only be done in the context of performance analysis. | |
91 | * These tunables will eventually be removed and replaced with #defines once | |
92 | * enough analysis has been done to determine optimal values. | |
93 | * | |
94 | * The 'zfs_sync_pass_deferred_free' pass must be greater than 1 to ensure that | |
95 | * regular blocks are not deferred. | |
96 | */ | |
97 | int zfs_sync_pass_deferred_free = 2; /* defer frees starting in this pass */ | |
98 | int zfs_sync_pass_dont_compress = 5; /* don't compress starting in this pass */ | |
99 | int zfs_sync_pass_rewrite = 2; /* rewrite new bps starting in this pass */ | |
100 | ||
34dc7c2f | 101 | /* |
b128c09f BB |
102 | * An allocating zio is one that either currently has the DVA allocate |
103 | * stage set or will have it later in its lifetime. | |
34dc7c2f | 104 | */ |
428870ff BB |
105 | #define IO_IS_ALLOCATING(zio) ((zio)->io_orig_pipeline & ZIO_STAGE_DVA_ALLOCATE) |
106 | ||
c409e464 | 107 | int zio_requeue_io_start_cut_in_line = 1; |
428870ff BB |
108 | |
109 | #ifdef ZFS_DEBUG | |
110 | int zio_buf_debug_limit = 16384; | |
111 | #else | |
112 | int zio_buf_debug_limit = 0; | |
113 | #endif | |
34dc7c2f | 114 | |
da6b4005 NB |
115 | static inline void __zio_execute(zio_t *zio); |
116 | ||
3dfb57a3 DB |
117 | static void zio_taskq_dispatch(zio_t *, zio_taskq_type_t, boolean_t); |
118 | ||
34dc7c2f BB |
119 | void |
120 | zio_init(void) | |
121 | { | |
122 | size_t c; | |
123 | vmem_t *data_alloc_arena = NULL; | |
124 | ||
3941503c BB |
125 | zio_cache = kmem_cache_create("zio_cache", |
126 | sizeof (zio_t), 0, NULL, NULL, NULL, NULL, NULL, 0); | |
d164b209 | 127 | zio_link_cache = kmem_cache_create("zio_link_cache", |
6795a698 | 128 | sizeof (zio_link_t), 0, NULL, NULL, NULL, NULL, NULL, 0); |
34dc7c2f BB |
129 | |
130 | /* | |
131 | * For small buffers, we want a cache for each multiple of | |
f1512ee6 MA |
132 | * SPA_MINBLOCKSIZE. For larger buffers, we want a cache |
133 | * for each quarter-power of 2. | |
34dc7c2f BB |
134 | */ |
135 | for (c = 0; c < SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT; c++) { | |
136 | size_t size = (c + 1) << SPA_MINBLOCKSHIFT; | |
137 | size_t p2 = size; | |
138 | size_t align = 0; | |
6442f3cf | 139 | size_t cflags = (size > zio_buf_debug_limit) ? KMC_NODEBUG : 0; |
34dc7c2f | 140 | |
34328f3c | 141 | #if defined(_ILP32) && defined(_KERNEL) |
f1512ee6 MA |
142 | /* |
143 | * Cache size limited to 1M on 32-bit platforms until ARC | |
144 | * buffers no longer require virtual address space. | |
145 | */ | |
146 | if (size > zfs_max_recordsize) | |
147 | break; | |
148 | #endif | |
149 | ||
150 | while (!ISP2(p2)) | |
34dc7c2f BB |
151 | p2 &= p2 - 1; |
152 | ||
498877ba MA |
153 | #ifndef _KERNEL |
154 | /* | |
155 | * If we are using watchpoints, put each buffer on its own page, | |
156 | * to eliminate the performance overhead of trapping to the | |
157 | * kernel when modifying a non-watched buffer that shares the | |
158 | * page with a watched buffer. | |
159 | */ | |
160 | if (arc_watch && !IS_P2ALIGNED(size, PAGESIZE)) | |
161 | continue; | |
fcf64f45 BB |
162 | /* |
163 | * Here's the problem - on 4K native devices in userland on | |
164 | * Linux using O_DIRECT, buffers must be 4K aligned or I/O | |
165 | * will fail with EINVAL, causing zdb (and others) to coredump. | |
166 | * Since userland probably doesn't need optimized buffer caches, | |
167 | * we just force 4K alignment on everything. | |
168 | */ | |
169 | align = 8 * SPA_MINBLOCKSIZE; | |
170 | #else | |
24fa2034 | 171 | if (size < PAGESIZE) { |
34dc7c2f | 172 | align = SPA_MINBLOCKSIZE; |
498877ba | 173 | } else if (IS_P2ALIGNED(size, p2 >> 2)) { |
24fa2034 | 174 | align = PAGESIZE; |
34dc7c2f | 175 | } |
fcf64f45 | 176 | #endif |
34dc7c2f BB |
177 | |
178 | if (align != 0) { | |
179 | char name[36]; | |
180 | (void) sprintf(name, "zio_buf_%lu", (ulong_t)size); | |
181 | zio_buf_cache[c] = kmem_cache_create(name, size, | |
6442f3cf | 182 | align, NULL, NULL, NULL, NULL, NULL, cflags); |
34dc7c2f BB |
183 | |
184 | (void) sprintf(name, "zio_data_buf_%lu", (ulong_t)size); | |
185 | zio_data_buf_cache[c] = kmem_cache_create(name, size, | |
ae6ba3db | 186 | align, NULL, NULL, NULL, NULL, |
6442f3cf | 187 | data_alloc_arena, cflags); |
34dc7c2f BB |
188 | } |
189 | } | |
190 | ||
191 | while (--c != 0) { | |
192 | ASSERT(zio_buf_cache[c] != NULL); | |
193 | if (zio_buf_cache[c - 1] == NULL) | |
194 | zio_buf_cache[c - 1] = zio_buf_cache[c]; | |
195 | ||
196 | ASSERT(zio_data_buf_cache[c] != NULL); | |
197 | if (zio_data_buf_cache[c - 1] == NULL) | |
198 | zio_data_buf_cache[c - 1] = zio_data_buf_cache[c]; | |
199 | } | |
200 | ||
34dc7c2f | 201 | zio_inject_init(); |
9759c60f ED |
202 | |
203 | lz4_init(); | |
34dc7c2f BB |
204 | } |
205 | ||
206 | void | |
207 | zio_fini(void) | |
208 | { | |
209 | size_t c; | |
210 | kmem_cache_t *last_cache = NULL; | |
211 | kmem_cache_t *last_data_cache = NULL; | |
212 | ||
213 | for (c = 0; c < SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT; c++) { | |
f1512ee6 MA |
214 | #ifdef _ILP32 |
215 | /* | |
216 | * Cache size limited to 1M on 32-bit platforms until ARC | |
217 | * buffers no longer require virtual address space. | |
218 | */ | |
219 | if (((c + 1) << SPA_MINBLOCKSHIFT) > zfs_max_recordsize) | |
220 | break; | |
a6255b7f DQ |
221 | #endif |
222 | #if defined(ZFS_DEBUG) && !defined(_KERNEL) | |
223 | if (zio_buf_cache_allocs[c] != zio_buf_cache_frees[c]) | |
224 | (void) printf("zio_fini: [%d] %llu != %llu\n", | |
225 | (int)((c + 1) << SPA_MINBLOCKSHIFT), | |
226 | (long long unsigned)zio_buf_cache_allocs[c], | |
227 | (long long unsigned)zio_buf_cache_frees[c]); | |
f1512ee6 | 228 | #endif |
34dc7c2f BB |
229 | if (zio_buf_cache[c] != last_cache) { |
230 | last_cache = zio_buf_cache[c]; | |
231 | kmem_cache_destroy(zio_buf_cache[c]); | |
232 | } | |
233 | zio_buf_cache[c] = NULL; | |
234 | ||
235 | if (zio_data_buf_cache[c] != last_data_cache) { | |
236 | last_data_cache = zio_data_buf_cache[c]; | |
237 | kmem_cache_destroy(zio_data_buf_cache[c]); | |
238 | } | |
239 | zio_data_buf_cache[c] = NULL; | |
240 | } | |
241 | ||
d164b209 | 242 | kmem_cache_destroy(zio_link_cache); |
34dc7c2f BB |
243 | kmem_cache_destroy(zio_cache); |
244 | ||
245 | zio_inject_fini(); | |
9759c60f ED |
246 | |
247 | lz4_fini(); | |
34dc7c2f BB |
248 | } |
249 | ||
250 | /* | |
251 | * ========================================================================== | |
252 | * Allocate and free I/O buffers | |
253 | * ========================================================================== | |
254 | */ | |
255 | ||
256 | /* | |
257 | * Use zio_buf_alloc to allocate ZFS metadata. This data will appear in a | |
258 | * crashdump if the kernel panics, so use it judiciously. Obviously, it's | |
259 | * useful to inspect ZFS metadata, but if possible, we should avoid keeping | |
260 | * excess / transient data in-core during a crashdump. | |
261 | */ | |
262 | void * | |
263 | zio_buf_alloc(size_t size) | |
264 | { | |
265 | size_t c = (size - 1) >> SPA_MINBLOCKSHIFT; | |
266 | ||
63e3a861 | 267 | VERIFY3U(c, <, SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT); |
a6255b7f DQ |
268 | #if defined(ZFS_DEBUG) && !defined(_KERNEL) |
269 | atomic_add_64(&zio_buf_cache_allocs[c], 1); | |
270 | #endif | |
34dc7c2f | 271 | |
efcd79a8 | 272 | return (kmem_cache_alloc(zio_buf_cache[c], KM_PUSHPAGE)); |
34dc7c2f BB |
273 | } |
274 | ||
275 | /* | |
276 | * Use zio_data_buf_alloc to allocate data. The data will not appear in a | |
277 | * crashdump if the kernel panics. This exists so that we will limit the amount | |
278 | * of ZFS data that shows up in a kernel crashdump. (Thus reducing the amount | |
279 | * of kernel heap dumped to disk when the kernel panics) | |
280 | */ | |
281 | void * | |
282 | zio_data_buf_alloc(size_t size) | |
283 | { | |
284 | size_t c = (size - 1) >> SPA_MINBLOCKSHIFT; | |
285 | ||
63e3a861 | 286 | VERIFY3U(c, <, SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT); |
34dc7c2f | 287 | |
efcd79a8 | 288 | return (kmem_cache_alloc(zio_data_buf_cache[c], KM_PUSHPAGE)); |
34dc7c2f BB |
289 | } |
290 | ||
291 | void | |
292 | zio_buf_free(void *buf, size_t size) | |
293 | { | |
294 | size_t c = (size - 1) >> SPA_MINBLOCKSHIFT; | |
295 | ||
63e3a861 | 296 | VERIFY3U(c, <, SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT); |
a6255b7f DQ |
297 | #if defined(ZFS_DEBUG) && !defined(_KERNEL) |
298 | atomic_add_64(&zio_buf_cache_frees[c], 1); | |
299 | #endif | |
34dc7c2f BB |
300 | |
301 | kmem_cache_free(zio_buf_cache[c], buf); | |
302 | } | |
303 | ||
304 | void | |
305 | zio_data_buf_free(void *buf, size_t size) | |
306 | { | |
307 | size_t c = (size - 1) >> SPA_MINBLOCKSHIFT; | |
308 | ||
63e3a861 | 309 | VERIFY3U(c, <, SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT); |
34dc7c2f BB |
310 | |
311 | kmem_cache_free(zio_data_buf_cache[c], buf); | |
312 | } | |
313 | ||
84c07ada GN |
314 | static void |
315 | zio_abd_free(void *abd, size_t size) | |
316 | { | |
317 | abd_free((abd_t *)abd); | |
318 | } | |
319 | ||
34dc7c2f BB |
320 | /* |
321 | * ========================================================================== | |
322 | * Push and pop I/O transform buffers | |
323 | * ========================================================================== | |
324 | */ | |
d3c2ae1c | 325 | void |
a6255b7f | 326 | zio_push_transform(zio_t *zio, abd_t *data, uint64_t size, uint64_t bufsize, |
e9aa730c | 327 | zio_transform_func_t *transform) |
34dc7c2f | 328 | { |
79c76d5b | 329 | zio_transform_t *zt = kmem_alloc(sizeof (zio_transform_t), KM_SLEEP); |
34dc7c2f | 330 | |
a6255b7f DQ |
331 | /* |
332 | * Ensure that anyone expecting this zio to contain a linear ABD isn't | |
333 | * going to get a nasty surprise when they try to access the data. | |
334 | */ | |
335 | IMPLY(abd_is_linear(zio->io_abd), abd_is_linear(data)); | |
336 | ||
337 | zt->zt_orig_abd = zio->io_abd; | |
b128c09f | 338 | zt->zt_orig_size = zio->io_size; |
34dc7c2f | 339 | zt->zt_bufsize = bufsize; |
b128c09f | 340 | zt->zt_transform = transform; |
34dc7c2f BB |
341 | |
342 | zt->zt_next = zio->io_transform_stack; | |
343 | zio->io_transform_stack = zt; | |
344 | ||
a6255b7f | 345 | zio->io_abd = data; |
34dc7c2f BB |
346 | zio->io_size = size; |
347 | } | |
348 | ||
d3c2ae1c | 349 | void |
b128c09f | 350 | zio_pop_transforms(zio_t *zio) |
34dc7c2f | 351 | { |
b128c09f BB |
352 | zio_transform_t *zt; |
353 | ||
354 | while ((zt = zio->io_transform_stack) != NULL) { | |
355 | if (zt->zt_transform != NULL) | |
356 | zt->zt_transform(zio, | |
a6255b7f | 357 | zt->zt_orig_abd, zt->zt_orig_size); |
34dc7c2f | 358 | |
428870ff | 359 | if (zt->zt_bufsize != 0) |
a6255b7f | 360 | abd_free(zio->io_abd); |
34dc7c2f | 361 | |
a6255b7f | 362 | zio->io_abd = zt->zt_orig_abd; |
b128c09f BB |
363 | zio->io_size = zt->zt_orig_size; |
364 | zio->io_transform_stack = zt->zt_next; | |
34dc7c2f | 365 | |
b128c09f | 366 | kmem_free(zt, sizeof (zio_transform_t)); |
34dc7c2f BB |
367 | } |
368 | } | |
369 | ||
b128c09f BB |
370 | /* |
371 | * ========================================================================== | |
b5256303 | 372 | * I/O transform callbacks for subblocks, decompression, and decryption |
b128c09f BB |
373 | * ========================================================================== |
374 | */ | |
375 | static void | |
a6255b7f | 376 | zio_subblock(zio_t *zio, abd_t *data, uint64_t size) |
b128c09f BB |
377 | { |
378 | ASSERT(zio->io_size > size); | |
379 | ||
380 | if (zio->io_type == ZIO_TYPE_READ) | |
a6255b7f | 381 | abd_copy(data, zio->io_abd, size); |
b128c09f BB |
382 | } |
383 | ||
384 | static void | |
a6255b7f | 385 | zio_decompress(zio_t *zio, abd_t *data, uint64_t size) |
b128c09f | 386 | { |
a6255b7f DQ |
387 | if (zio->io_error == 0) { |
388 | void *tmp = abd_borrow_buf(data, size); | |
389 | int ret = zio_decompress_data(BP_GET_COMPRESS(zio->io_bp), | |
390 | zio->io_abd, tmp, zio->io_size, size); | |
391 | abd_return_buf_copy(data, tmp, size); | |
392 | ||
393 | if (ret != 0) | |
394 | zio->io_error = SET_ERROR(EIO); | |
395 | } | |
b128c09f BB |
396 | } |
397 | ||
b5256303 TC |
398 | static void |
399 | zio_decrypt(zio_t *zio, abd_t *data, uint64_t size) | |
400 | { | |
401 | int ret; | |
402 | void *tmp; | |
403 | blkptr_t *bp = zio->io_bp; | |
404 | uint64_t lsize = BP_GET_LSIZE(bp); | |
405 | dmu_object_type_t ot = BP_GET_TYPE(bp); | |
406 | uint8_t salt[ZIO_DATA_SALT_LEN]; | |
407 | uint8_t iv[ZIO_DATA_IV_LEN]; | |
408 | uint8_t mac[ZIO_DATA_MAC_LEN]; | |
409 | boolean_t no_crypt = B_FALSE; | |
410 | ||
411 | ASSERT(BP_USES_CRYPT(bp)); | |
412 | ASSERT3U(size, !=, 0); | |
413 | ||
414 | if (zio->io_error != 0) | |
415 | return; | |
416 | ||
417 | /* | |
418 | * Verify the cksum of MACs stored in an indirect bp. It will always | |
419 | * be possible to verify this since it does not require an encryption | |
420 | * key. | |
421 | */ | |
422 | if (BP_HAS_INDIRECT_MAC_CKSUM(bp)) { | |
423 | zio_crypt_decode_mac_bp(bp, mac); | |
424 | ||
425 | if (BP_GET_COMPRESS(bp) != ZIO_COMPRESS_OFF) { | |
426 | /* | |
427 | * We haven't decompressed the data yet, but | |
428 | * zio_crypt_do_indirect_mac_checksum() requires | |
429 | * decompressed data to be able to parse out the MACs | |
430 | * from the indirect block. We decompress it now and | |
431 | * throw away the result after we are finished. | |
432 | */ | |
433 | tmp = zio_buf_alloc(lsize); | |
434 | ret = zio_decompress_data(BP_GET_COMPRESS(bp), | |
435 | zio->io_abd, tmp, zio->io_size, lsize); | |
436 | if (ret != 0) { | |
437 | ret = SET_ERROR(EIO); | |
438 | goto error; | |
439 | } | |
440 | ret = zio_crypt_do_indirect_mac_checksum(B_FALSE, | |
441 | tmp, lsize, BP_SHOULD_BYTESWAP(bp), mac); | |
442 | zio_buf_free(tmp, lsize); | |
443 | } else { | |
444 | ret = zio_crypt_do_indirect_mac_checksum_abd(B_FALSE, | |
445 | zio->io_abd, size, BP_SHOULD_BYTESWAP(bp), mac); | |
446 | } | |
447 | abd_copy(data, zio->io_abd, size); | |
448 | ||
449 | if (ret != 0) | |
450 | goto error; | |
451 | ||
452 | return; | |
453 | } | |
454 | ||
455 | /* | |
456 | * If this is an authenticated block, just check the MAC. It would be | |
457 | * nice to separate this out into its own flag, but for the moment | |
458 | * enum zio_flag is out of bits. | |
459 | */ | |
460 | if (BP_IS_AUTHENTICATED(bp)) { | |
461 | if (ot == DMU_OT_OBJSET) { | |
462 | ret = spa_do_crypt_objset_mac_abd(B_FALSE, zio->io_spa, | |
463 | zio->io_bookmark.zb_objset, zio->io_abd, size, | |
464 | BP_SHOULD_BYTESWAP(bp)); | |
465 | } else { | |
466 | zio_crypt_decode_mac_bp(bp, mac); | |
467 | ret = spa_do_crypt_mac_abd(B_FALSE, zio->io_spa, | |
468 | zio->io_bookmark.zb_objset, zio->io_abd, size, mac); | |
469 | } | |
470 | abd_copy(data, zio->io_abd, size); | |
471 | ||
472 | if (ret != 0) | |
473 | goto error; | |
474 | ||
475 | return; | |
476 | } | |
477 | ||
478 | zio_crypt_decode_params_bp(bp, salt, iv); | |
479 | ||
480 | if (ot == DMU_OT_INTENT_LOG) { | |
481 | tmp = abd_borrow_buf_copy(zio->io_abd, sizeof (zil_chain_t)); | |
482 | zio_crypt_decode_mac_zil(tmp, mac); | |
483 | abd_return_buf(zio->io_abd, tmp, sizeof (zil_chain_t)); | |
484 | } else { | |
485 | zio_crypt_decode_mac_bp(bp, mac); | |
486 | } | |
487 | ||
488 | ret = spa_do_crypt_abd(B_FALSE, zio->io_spa, zio->io_bookmark.zb_objset, | |
489 | bp, bp->blk_birth, size, data, zio->io_abd, iv, mac, salt, | |
490 | &no_crypt); | |
491 | if (no_crypt) | |
492 | abd_copy(data, zio->io_abd, size); | |
493 | ||
494 | if (ret != 0) | |
495 | goto error; | |
496 | ||
497 | return; | |
498 | ||
499 | error: | |
500 | /* assert that the key was found unless this was speculative */ | |
501 | ASSERT(ret != ENOENT || (zio->io_flags & ZIO_FLAG_SPECULATIVE)); | |
502 | ||
503 | /* | |
504 | * If there was a decryption / authentication error return EIO as | |
505 | * the io_error. If this was not a speculative zio, create an ereport. | |
506 | */ | |
507 | if (ret == ECKSUM) { | |
508 | ret = SET_ERROR(EIO); | |
509 | if ((zio->io_flags & ZIO_FLAG_SPECULATIVE) == 0) { | |
510 | zfs_ereport_post(FM_EREPORT_ZFS_AUTHENTICATION, | |
511 | zio->io_spa, NULL, &zio->io_bookmark, zio, 0, 0); | |
512 | } | |
513 | } else { | |
514 | zio->io_error = ret; | |
515 | } | |
516 | } | |
517 | ||
b128c09f BB |
518 | /* |
519 | * ========================================================================== | |
520 | * I/O parent/child relationships and pipeline interlocks | |
521 | * ========================================================================== | |
522 | */ | |
d164b209 | 523 | zio_t * |
3dfb57a3 | 524 | zio_walk_parents(zio_t *cio, zio_link_t **zl) |
d164b209 | 525 | { |
d164b209 | 526 | list_t *pl = &cio->io_parent_list; |
b128c09f | 527 | |
3dfb57a3 DB |
528 | *zl = (*zl == NULL) ? list_head(pl) : list_next(pl, *zl); |
529 | if (*zl == NULL) | |
d164b209 BB |
530 | return (NULL); |
531 | ||
3dfb57a3 DB |
532 | ASSERT((*zl)->zl_child == cio); |
533 | return ((*zl)->zl_parent); | |
d164b209 BB |
534 | } |
535 | ||
536 | zio_t * | |
3dfb57a3 | 537 | zio_walk_children(zio_t *pio, zio_link_t **zl) |
d164b209 | 538 | { |
d164b209 BB |
539 | list_t *cl = &pio->io_child_list; |
540 | ||
3dfb57a3 DB |
541 | *zl = (*zl == NULL) ? list_head(cl) : list_next(cl, *zl); |
542 | if (*zl == NULL) | |
d164b209 BB |
543 | return (NULL); |
544 | ||
3dfb57a3 DB |
545 | ASSERT((*zl)->zl_parent == pio); |
546 | return ((*zl)->zl_child); | |
d164b209 BB |
547 | } |
548 | ||
549 | zio_t * | |
550 | zio_unique_parent(zio_t *cio) | |
551 | { | |
3dfb57a3 DB |
552 | zio_link_t *zl = NULL; |
553 | zio_t *pio = zio_walk_parents(cio, &zl); | |
d164b209 | 554 | |
3dfb57a3 | 555 | VERIFY3P(zio_walk_parents(cio, &zl), ==, NULL); |
d164b209 BB |
556 | return (pio); |
557 | } | |
558 | ||
559 | void | |
560 | zio_add_child(zio_t *pio, zio_t *cio) | |
b128c09f | 561 | { |
79c76d5b | 562 | zio_link_t *zl = kmem_cache_alloc(zio_link_cache, KM_SLEEP); |
d164b209 BB |
563 | |
564 | /* | |
565 | * Logical I/Os can have logical, gang, or vdev children. | |
566 | * Gang I/Os can have gang or vdev children. | |
567 | * Vdev I/Os can only have vdev children. | |
568 | * The following ASSERT captures all of these constraints. | |
569 | */ | |
570 | ASSERT(cio->io_child_type <= pio->io_child_type); | |
571 | ||
572 | zl->zl_parent = pio; | |
573 | zl->zl_child = cio; | |
574 | ||
575 | mutex_enter(&cio->io_lock); | |
b128c09f | 576 | mutex_enter(&pio->io_lock); |
d164b209 BB |
577 | |
578 | ASSERT(pio->io_state[ZIO_WAIT_DONE] == 0); | |
579 | ||
1c27024e | 580 | for (int w = 0; w < ZIO_WAIT_TYPES; w++) |
d164b209 BB |
581 | pio->io_children[cio->io_child_type][w] += !cio->io_state[w]; |
582 | ||
583 | list_insert_head(&pio->io_child_list, zl); | |
584 | list_insert_head(&cio->io_parent_list, zl); | |
585 | ||
428870ff BB |
586 | pio->io_child_count++; |
587 | cio->io_parent_count++; | |
588 | ||
b128c09f | 589 | mutex_exit(&pio->io_lock); |
d164b209 | 590 | mutex_exit(&cio->io_lock); |
b128c09f BB |
591 | } |
592 | ||
34dc7c2f | 593 | static void |
d164b209 | 594 | zio_remove_child(zio_t *pio, zio_t *cio, zio_link_t *zl) |
b128c09f | 595 | { |
d164b209 BB |
596 | ASSERT(zl->zl_parent == pio); |
597 | ASSERT(zl->zl_child == cio); | |
b128c09f | 598 | |
d164b209 | 599 | mutex_enter(&cio->io_lock); |
b128c09f | 600 | mutex_enter(&pio->io_lock); |
d164b209 BB |
601 | |
602 | list_remove(&pio->io_child_list, zl); | |
603 | list_remove(&cio->io_parent_list, zl); | |
604 | ||
428870ff BB |
605 | pio->io_child_count--; |
606 | cio->io_parent_count--; | |
607 | ||
b128c09f | 608 | mutex_exit(&pio->io_lock); |
d164b209 | 609 | mutex_exit(&cio->io_lock); |
d164b209 | 610 | kmem_cache_free(zio_link_cache, zl); |
b128c09f BB |
611 | } |
612 | ||
613 | static boolean_t | |
614 | zio_wait_for_children(zio_t *zio, enum zio_child child, enum zio_wait_type wait) | |
34dc7c2f | 615 | { |
b128c09f BB |
616 | uint64_t *countp = &zio->io_children[child][wait]; |
617 | boolean_t waiting = B_FALSE; | |
618 | ||
619 | mutex_enter(&zio->io_lock); | |
620 | ASSERT(zio->io_stall == NULL); | |
621 | if (*countp != 0) { | |
428870ff | 622 | zio->io_stage >>= 1; |
3dfb57a3 | 623 | ASSERT3U(zio->io_stage, !=, ZIO_STAGE_OPEN); |
b128c09f BB |
624 | zio->io_stall = countp; |
625 | waiting = B_TRUE; | |
626 | } | |
627 | mutex_exit(&zio->io_lock); | |
628 | ||
629 | return (waiting); | |
630 | } | |
34dc7c2f | 631 | |
bf701a83 BB |
632 | __attribute__((always_inline)) |
633 | static inline void | |
b128c09f BB |
634 | zio_notify_parent(zio_t *pio, zio_t *zio, enum zio_wait_type wait) |
635 | { | |
636 | uint64_t *countp = &pio->io_children[zio->io_child_type][wait]; | |
637 | int *errorp = &pio->io_child_error[zio->io_child_type]; | |
34dc7c2f | 638 | |
b128c09f BB |
639 | mutex_enter(&pio->io_lock); |
640 | if (zio->io_error && !(zio->io_flags & ZIO_FLAG_DONT_PROPAGATE)) | |
641 | *errorp = zio_worst_error(*errorp, zio->io_error); | |
642 | pio->io_reexecute |= zio->io_reexecute; | |
643 | ASSERT3U(*countp, >, 0); | |
e8b96c60 MA |
644 | |
645 | (*countp)--; | |
646 | ||
647 | if (*countp == 0 && pio->io_stall == countp) { | |
3dfb57a3 DB |
648 | zio_taskq_type_t type = |
649 | pio->io_stage < ZIO_STAGE_VDEV_IO_START ? ZIO_TASKQ_ISSUE : | |
650 | ZIO_TASKQ_INTERRUPT; | |
b128c09f BB |
651 | pio->io_stall = NULL; |
652 | mutex_exit(&pio->io_lock); | |
3dfb57a3 DB |
653 | /* |
654 | * Dispatch the parent zio in its own taskq so that | |
655 | * the child can continue to make progress. This also | |
656 | * prevents overflowing the stack when we have deeply nested | |
657 | * parent-child relationships. | |
658 | */ | |
659 | zio_taskq_dispatch(pio, type, B_FALSE); | |
b128c09f BB |
660 | } else { |
661 | mutex_exit(&pio->io_lock); | |
34dc7c2f BB |
662 | } |
663 | } | |
664 | ||
b128c09f BB |
665 | static void |
666 | zio_inherit_child_errors(zio_t *zio, enum zio_child c) | |
667 | { | |
668 | if (zio->io_child_error[c] != 0 && zio->io_error == 0) | |
669 | zio->io_error = zio->io_child_error[c]; | |
670 | } | |
671 | ||
3dfb57a3 | 672 | int |
64fc7762 | 673 | zio_bookmark_compare(const void *x1, const void *x2) |
3dfb57a3 DB |
674 | { |
675 | const zio_t *z1 = x1; | |
676 | const zio_t *z2 = x2; | |
3dfb57a3 | 677 | |
64fc7762 MA |
678 | if (z1->io_bookmark.zb_objset < z2->io_bookmark.zb_objset) |
679 | return (-1); | |
680 | if (z1->io_bookmark.zb_objset > z2->io_bookmark.zb_objset) | |
681 | return (1); | |
3dfb57a3 | 682 | |
64fc7762 MA |
683 | if (z1->io_bookmark.zb_object < z2->io_bookmark.zb_object) |
684 | return (-1); | |
685 | if (z1->io_bookmark.zb_object > z2->io_bookmark.zb_object) | |
686 | return (1); | |
3dfb57a3 | 687 | |
64fc7762 MA |
688 | if (z1->io_bookmark.zb_level < z2->io_bookmark.zb_level) |
689 | return (-1); | |
690 | if (z1->io_bookmark.zb_level > z2->io_bookmark.zb_level) | |
691 | return (1); | |
692 | ||
693 | if (z1->io_bookmark.zb_blkid < z2->io_bookmark.zb_blkid) | |
694 | return (-1); | |
695 | if (z1->io_bookmark.zb_blkid > z2->io_bookmark.zb_blkid) | |
696 | return (1); | |
697 | ||
698 | if (z1 < z2) | |
699 | return (-1); | |
700 | if (z1 > z2) | |
701 | return (1); | |
702 | ||
703 | return (0); | |
3dfb57a3 DB |
704 | } |
705 | ||
34dc7c2f BB |
706 | /* |
707 | * ========================================================================== | |
b128c09f | 708 | * Create the various types of I/O (read, write, free, etc) |
34dc7c2f BB |
709 | * ========================================================================== |
710 | */ | |
711 | static zio_t * | |
428870ff | 712 | zio_create(zio_t *pio, spa_t *spa, uint64_t txg, const blkptr_t *bp, |
a6255b7f | 713 | abd_t *data, uint64_t lsize, uint64_t psize, zio_done_func_t *done, |
2aa34383 DK |
714 | void *private, zio_type_t type, zio_priority_t priority, |
715 | enum zio_flag flags, vdev_t *vd, uint64_t offset, | |
716 | const zbookmark_phys_t *zb, enum zio_stage stage, | |
717 | enum zio_stage pipeline) | |
34dc7c2f BB |
718 | { |
719 | zio_t *zio; | |
720 | ||
2aa34383 DK |
721 | ASSERT3U(psize, <=, SPA_MAXBLOCKSIZE); |
722 | ASSERT(P2PHASE(psize, SPA_MINBLOCKSIZE) == 0); | |
b128c09f BB |
723 | ASSERT(P2PHASE(offset, SPA_MINBLOCKSIZE) == 0); |
724 | ||
725 | ASSERT(!vd || spa_config_held(spa, SCL_STATE_ALL, RW_READER)); | |
726 | ASSERT(!bp || !(flags & ZIO_FLAG_CONFIG_WRITER)); | |
727 | ASSERT(vd || stage == ZIO_STAGE_OPEN); | |
34dc7c2f | 728 | |
b5256303 | 729 | IMPLY(lsize != psize, (flags & ZIO_FLAG_RAW_COMPRESS) != 0); |
2aa34383 | 730 | |
79c76d5b | 731 | zio = kmem_cache_alloc(zio_cache, KM_SLEEP); |
3941503c BB |
732 | bzero(zio, sizeof (zio_t)); |
733 | ||
448d7aaa | 734 | mutex_init(&zio->io_lock, NULL, MUTEX_NOLOCKDEP, NULL); |
3941503c BB |
735 | cv_init(&zio->io_cv, NULL, CV_DEFAULT, NULL); |
736 | ||
737 | list_create(&zio->io_parent_list, sizeof (zio_link_t), | |
738 | offsetof(zio_link_t, zl_parent_node)); | |
739 | list_create(&zio->io_child_list, sizeof (zio_link_t), | |
740 | offsetof(zio_link_t, zl_child_node)); | |
4e21fd06 | 741 | metaslab_trace_init(&zio->io_alloc_list); |
d164b209 | 742 | |
b128c09f BB |
743 | if (vd != NULL) |
744 | zio->io_child_type = ZIO_CHILD_VDEV; | |
745 | else if (flags & ZIO_FLAG_GANG_CHILD) | |
746 | zio->io_child_type = ZIO_CHILD_GANG; | |
428870ff BB |
747 | else if (flags & ZIO_FLAG_DDT_CHILD) |
748 | zio->io_child_type = ZIO_CHILD_DDT; | |
b128c09f BB |
749 | else |
750 | zio->io_child_type = ZIO_CHILD_LOGICAL; | |
751 | ||
34dc7c2f | 752 | if (bp != NULL) { |
428870ff | 753 | zio->io_bp = (blkptr_t *)bp; |
34dc7c2f BB |
754 | zio->io_bp_copy = *bp; |
755 | zio->io_bp_orig = *bp; | |
428870ff BB |
756 | if (type != ZIO_TYPE_WRITE || |
757 | zio->io_child_type == ZIO_CHILD_DDT) | |
b128c09f | 758 | zio->io_bp = &zio->io_bp_copy; /* so caller can free */ |
9babb374 | 759 | if (zio->io_child_type == ZIO_CHILD_LOGICAL) |
b128c09f | 760 | zio->io_logical = zio; |
9babb374 BB |
761 | if (zio->io_child_type > ZIO_CHILD_GANG && BP_IS_GANG(bp)) |
762 | pipeline |= ZIO_GANG_STAGES; | |
34dc7c2f | 763 | } |
b128c09f BB |
764 | |
765 | zio->io_spa = spa; | |
766 | zio->io_txg = txg; | |
34dc7c2f BB |
767 | zio->io_done = done; |
768 | zio->io_private = private; | |
769 | zio->io_type = type; | |
770 | zio->io_priority = priority; | |
b128c09f BB |
771 | zio->io_vd = vd; |
772 | zio->io_offset = offset; | |
a6255b7f | 773 | zio->io_orig_abd = zio->io_abd = data; |
2aa34383 DK |
774 | zio->io_orig_size = zio->io_size = psize; |
775 | zio->io_lsize = lsize; | |
b128c09f BB |
776 | zio->io_orig_flags = zio->io_flags = flags; |
777 | zio->io_orig_stage = zio->io_stage = stage; | |
778 | zio->io_orig_pipeline = zio->io_pipeline = pipeline; | |
3dfb57a3 | 779 | zio->io_pipeline_trace = ZIO_STAGE_OPEN; |
34dc7c2f | 780 | |
d164b209 BB |
781 | zio->io_state[ZIO_WAIT_READY] = (stage >= ZIO_STAGE_READY); |
782 | zio->io_state[ZIO_WAIT_DONE] = (stage >= ZIO_STAGE_DONE); | |
783 | ||
b128c09f BB |
784 | if (zb != NULL) |
785 | zio->io_bookmark = *zb; | |
786 | ||
787 | if (pio != NULL) { | |
b128c09f | 788 | if (zio->io_logical == NULL) |
34dc7c2f | 789 | zio->io_logical = pio->io_logical; |
9babb374 BB |
790 | if (zio->io_child_type == ZIO_CHILD_GANG) |
791 | zio->io_gang_leader = pio->io_gang_leader; | |
b128c09f | 792 | zio_add_child(pio, zio); |
34dc7c2f BB |
793 | } |
794 | ||
a38718a6 GA |
795 | taskq_init_ent(&zio->io_tqent); |
796 | ||
34dc7c2f BB |
797 | return (zio); |
798 | } | |
799 | ||
800 | static void | |
b128c09f | 801 | zio_destroy(zio_t *zio) |
34dc7c2f | 802 | { |
4e21fd06 | 803 | metaslab_trace_fini(&zio->io_alloc_list); |
3941503c BB |
804 | list_destroy(&zio->io_parent_list); |
805 | list_destroy(&zio->io_child_list); | |
806 | mutex_destroy(&zio->io_lock); | |
807 | cv_destroy(&zio->io_cv); | |
b128c09f | 808 | kmem_cache_free(zio_cache, zio); |
34dc7c2f BB |
809 | } |
810 | ||
811 | zio_t * | |
d164b209 | 812 | zio_null(zio_t *pio, spa_t *spa, vdev_t *vd, zio_done_func_t *done, |
428870ff | 813 | void *private, enum zio_flag flags) |
34dc7c2f BB |
814 | { |
815 | zio_t *zio; | |
816 | ||
2aa34383 | 817 | zio = zio_create(pio, spa, 0, NULL, NULL, 0, 0, done, private, |
d164b209 | 818 | ZIO_TYPE_NULL, ZIO_PRIORITY_NOW, flags, vd, 0, NULL, |
b128c09f | 819 | ZIO_STAGE_OPEN, ZIO_INTERLOCK_PIPELINE); |
34dc7c2f BB |
820 | |
821 | return (zio); | |
822 | } | |
823 | ||
824 | zio_t * | |
428870ff | 825 | zio_root(spa_t *spa, zio_done_func_t *done, void *private, enum zio_flag flags) |
34dc7c2f | 826 | { |
d164b209 | 827 | return (zio_null(NULL, spa, NULL, done, private, flags)); |
34dc7c2f BB |
828 | } |
829 | ||
63e3a861 MA |
830 | void |
831 | zfs_blkptr_verify(spa_t *spa, const blkptr_t *bp) | |
832 | { | |
63e3a861 MA |
833 | if (!DMU_OT_IS_VALID(BP_GET_TYPE(bp))) { |
834 | zfs_panic_recover("blkptr at %p has invalid TYPE %llu", | |
835 | bp, (longlong_t)BP_GET_TYPE(bp)); | |
836 | } | |
837 | if (BP_GET_CHECKSUM(bp) >= ZIO_CHECKSUM_FUNCTIONS || | |
838 | BP_GET_CHECKSUM(bp) <= ZIO_CHECKSUM_ON) { | |
839 | zfs_panic_recover("blkptr at %p has invalid CHECKSUM %llu", | |
840 | bp, (longlong_t)BP_GET_CHECKSUM(bp)); | |
841 | } | |
842 | if (BP_GET_COMPRESS(bp) >= ZIO_COMPRESS_FUNCTIONS || | |
843 | BP_GET_COMPRESS(bp) <= ZIO_COMPRESS_ON) { | |
844 | zfs_panic_recover("blkptr at %p has invalid COMPRESS %llu", | |
845 | bp, (longlong_t)BP_GET_COMPRESS(bp)); | |
846 | } | |
847 | if (BP_GET_LSIZE(bp) > SPA_MAXBLOCKSIZE) { | |
848 | zfs_panic_recover("blkptr at %p has invalid LSIZE %llu", | |
849 | bp, (longlong_t)BP_GET_LSIZE(bp)); | |
850 | } | |
851 | if (BP_GET_PSIZE(bp) > SPA_MAXBLOCKSIZE) { | |
852 | zfs_panic_recover("blkptr at %p has invalid PSIZE %llu", | |
853 | bp, (longlong_t)BP_GET_PSIZE(bp)); | |
854 | } | |
855 | ||
856 | if (BP_IS_EMBEDDED(bp)) { | |
857 | if (BPE_GET_ETYPE(bp) > NUM_BP_EMBEDDED_TYPES) { | |
858 | zfs_panic_recover("blkptr at %p has invalid ETYPE %llu", | |
859 | bp, (longlong_t)BPE_GET_ETYPE(bp)); | |
860 | } | |
861 | } | |
862 | ||
863 | /* | |
864 | * Pool-specific checks. | |
865 | * | |
866 | * Note: it would be nice to verify that the blk_birth and | |
867 | * BP_PHYSICAL_BIRTH() are not too large. However, spa_freeze() | |
868 | * allows the birth time of log blocks (and dmu_sync()-ed blocks | |
869 | * that are in the log) to be arbitrarily large. | |
870 | */ | |
1c27024e | 871 | for (int i = 0; i < BP_GET_NDVAS(bp); i++) { |
63e3a861 | 872 | uint64_t vdevid = DVA_GET_VDEV(&bp->blk_dva[i]); |
1c27024e | 873 | |
63e3a861 MA |
874 | if (vdevid >= spa->spa_root_vdev->vdev_children) { |
875 | zfs_panic_recover("blkptr at %p DVA %u has invalid " | |
876 | "VDEV %llu", | |
877 | bp, i, (longlong_t)vdevid); | |
ee3a23b8 | 878 | continue; |
63e3a861 | 879 | } |
1c27024e | 880 | vdev_t *vd = spa->spa_root_vdev->vdev_child[vdevid]; |
63e3a861 MA |
881 | if (vd == NULL) { |
882 | zfs_panic_recover("blkptr at %p DVA %u has invalid " | |
883 | "VDEV %llu", | |
884 | bp, i, (longlong_t)vdevid); | |
ee3a23b8 | 885 | continue; |
63e3a861 MA |
886 | } |
887 | if (vd->vdev_ops == &vdev_hole_ops) { | |
888 | zfs_panic_recover("blkptr at %p DVA %u has hole " | |
889 | "VDEV %llu", | |
890 | bp, i, (longlong_t)vdevid); | |
ee3a23b8 | 891 | continue; |
63e3a861 MA |
892 | } |
893 | if (vd->vdev_ops == &vdev_missing_ops) { | |
894 | /* | |
895 | * "missing" vdevs are valid during import, but we | |
896 | * don't have their detailed info (e.g. asize), so | |
897 | * we can't perform any more checks on them. | |
898 | */ | |
899 | continue; | |
900 | } | |
1c27024e DB |
901 | uint64_t offset = DVA_GET_OFFSET(&bp->blk_dva[i]); |
902 | uint64_t asize = DVA_GET_ASIZE(&bp->blk_dva[i]); | |
63e3a861 MA |
903 | if (BP_IS_GANG(bp)) |
904 | asize = vdev_psize_to_asize(vd, SPA_GANGBLOCKSIZE); | |
905 | if (offset + asize > vd->vdev_asize) { | |
906 | zfs_panic_recover("blkptr at %p DVA %u has invalid " | |
907 | "OFFSET %llu", | |
908 | bp, i, (longlong_t)offset); | |
909 | } | |
910 | } | |
911 | } | |
912 | ||
34dc7c2f | 913 | zio_t * |
b128c09f | 914 | zio_read(zio_t *pio, spa_t *spa, const blkptr_t *bp, |
a6255b7f | 915 | abd_t *data, uint64_t size, zio_done_func_t *done, void *private, |
5dbd68a3 | 916 | zio_priority_t priority, enum zio_flag flags, const zbookmark_phys_t *zb) |
34dc7c2f BB |
917 | { |
918 | zio_t *zio; | |
919 | ||
63e3a861 MA |
920 | zfs_blkptr_verify(spa, bp); |
921 | ||
428870ff | 922 | zio = zio_create(pio, spa, BP_PHYSICAL_BIRTH(bp), bp, |
2aa34383 | 923 | data, size, size, done, private, |
b128c09f | 924 | ZIO_TYPE_READ, priority, flags, NULL, 0, zb, |
428870ff BB |
925 | ZIO_STAGE_OPEN, (flags & ZIO_FLAG_DDT_CHILD) ? |
926 | ZIO_DDT_CHILD_READ_PIPELINE : ZIO_READ_PIPELINE); | |
34dc7c2f | 927 | |
b128c09f BB |
928 | return (zio); |
929 | } | |
34dc7c2f | 930 | |
34dc7c2f | 931 | zio_t * |
b128c09f | 932 | zio_write(zio_t *pio, spa_t *spa, uint64_t txg, blkptr_t *bp, |
a6255b7f | 933 | abd_t *data, uint64_t lsize, uint64_t psize, const zio_prop_t *zp, |
bc77ba73 PD |
934 | zio_done_func_t *ready, zio_done_func_t *children_ready, |
935 | zio_done_func_t *physdone, zio_done_func_t *done, | |
936 | void *private, zio_priority_t priority, enum zio_flag flags, | |
937 | const zbookmark_phys_t *zb) | |
34dc7c2f BB |
938 | { |
939 | zio_t *zio; | |
940 | ||
b128c09f BB |
941 | ASSERT(zp->zp_checksum >= ZIO_CHECKSUM_OFF && |
942 | zp->zp_checksum < ZIO_CHECKSUM_FUNCTIONS && | |
943 | zp->zp_compress >= ZIO_COMPRESS_OFF && | |
944 | zp->zp_compress < ZIO_COMPRESS_FUNCTIONS && | |
9ae529ec | 945 | DMU_OT_IS_VALID(zp->zp_type) && |
b128c09f | 946 | zp->zp_level < 32 && |
428870ff | 947 | zp->zp_copies > 0 && |
03c6040b | 948 | zp->zp_copies <= spa_max_replication(spa)); |
34dc7c2f | 949 | |
2aa34383 | 950 | zio = zio_create(pio, spa, txg, bp, data, lsize, psize, done, private, |
b128c09f | 951 | ZIO_TYPE_WRITE, priority, flags, NULL, 0, zb, |
428870ff BB |
952 | ZIO_STAGE_OPEN, (flags & ZIO_FLAG_DDT_CHILD) ? |
953 | ZIO_DDT_CHILD_WRITE_PIPELINE : ZIO_WRITE_PIPELINE); | |
34dc7c2f BB |
954 | |
955 | zio->io_ready = ready; | |
bc77ba73 | 956 | zio->io_children_ready = children_ready; |
e8b96c60 | 957 | zio->io_physdone = physdone; |
b128c09f | 958 | zio->io_prop = *zp; |
34dc7c2f | 959 | |
9b67f605 MA |
960 | /* |
961 | * Data can be NULL if we are going to call zio_write_override() to | |
962 | * provide the already-allocated BP. But we may need the data to | |
963 | * verify a dedup hit (if requested). In this case, don't try to | |
b5256303 TC |
964 | * dedup (just take the already-allocated BP verbatim). Encrypted |
965 | * dedup blocks need data as well so we also disable dedup in this | |
966 | * case. | |
9b67f605 | 967 | */ |
b5256303 TC |
968 | if (data == NULL && |
969 | (zio->io_prop.zp_dedup_verify || zio->io_prop.zp_encrypt)) { | |
9b67f605 MA |
970 | zio->io_prop.zp_dedup = zio->io_prop.zp_dedup_verify = B_FALSE; |
971 | } | |
972 | ||
34dc7c2f BB |
973 | return (zio); |
974 | } | |
975 | ||
976 | zio_t * | |
a6255b7f | 977 | zio_rewrite(zio_t *pio, spa_t *spa, uint64_t txg, blkptr_t *bp, abd_t *data, |
e8b96c60 | 978 | uint64_t size, zio_done_func_t *done, void *private, |
5dbd68a3 | 979 | zio_priority_t priority, enum zio_flag flags, zbookmark_phys_t *zb) |
34dc7c2f BB |
980 | { |
981 | zio_t *zio; | |
982 | ||
2aa34383 | 983 | zio = zio_create(pio, spa, txg, bp, data, size, size, done, private, |
3dfb57a3 | 984 | ZIO_TYPE_WRITE, priority, flags | ZIO_FLAG_IO_REWRITE, NULL, 0, zb, |
b128c09f | 985 | ZIO_STAGE_OPEN, ZIO_REWRITE_PIPELINE); |
34dc7c2f BB |
986 | |
987 | return (zio); | |
988 | } | |
989 | ||
428870ff | 990 | void |
03c6040b | 991 | zio_write_override(zio_t *zio, blkptr_t *bp, int copies, boolean_t nopwrite) |
428870ff BB |
992 | { |
993 | ASSERT(zio->io_type == ZIO_TYPE_WRITE); | |
994 | ASSERT(zio->io_child_type == ZIO_CHILD_LOGICAL); | |
995 | ASSERT(zio->io_stage == ZIO_STAGE_OPEN); | |
996 | ASSERT(zio->io_txg == spa_syncing_txg(zio->io_spa)); | |
997 | ||
03c6040b GW |
998 | /* |
999 | * We must reset the io_prop to match the values that existed | |
1000 | * when the bp was first written by dmu_sync() keeping in mind | |
1001 | * that nopwrite and dedup are mutually exclusive. | |
1002 | */ | |
1003 | zio->io_prop.zp_dedup = nopwrite ? B_FALSE : zio->io_prop.zp_dedup; | |
1004 | zio->io_prop.zp_nopwrite = nopwrite; | |
428870ff BB |
1005 | zio->io_prop.zp_copies = copies; |
1006 | zio->io_bp_override = bp; | |
1007 | } | |
1008 | ||
1009 | void | |
1010 | zio_free(spa_t *spa, uint64_t txg, const blkptr_t *bp) | |
1011 | { | |
9b67f605 MA |
1012 | |
1013 | /* | |
1014 | * The check for EMBEDDED is a performance optimization. We | |
1015 | * process the free here (by ignoring it) rather than | |
1016 | * putting it on the list and then processing it in zio_free_sync(). | |
1017 | */ | |
1018 | if (BP_IS_EMBEDDED(bp)) | |
1019 | return; | |
13fe0198 | 1020 | metaslab_check_free(spa, bp); |
2883cad5 MA |
1021 | |
1022 | /* | |
1023 | * Frees that are for the currently-syncing txg, are not going to be | |
1024 | * deferred, and which will not need to do a read (i.e. not GANG or | |
1025 | * DEDUP), can be processed immediately. Otherwise, put them on the | |
1026 | * in-memory list for later processing. | |
1027 | */ | |
1028 | if (BP_IS_GANG(bp) || BP_GET_DEDUP(bp) || | |
1029 | txg != spa->spa_syncing_txg || | |
1030 | spa_sync_pass(spa) >= zfs_sync_pass_deferred_free) { | |
1031 | bplist_append(&spa->spa_free_bplist[txg & TXG_MASK], bp); | |
1032 | } else { | |
1033 | VERIFY0(zio_wait(zio_free_sync(NULL, spa, txg, bp, 0))); | |
1034 | } | |
428870ff BB |
1035 | } |
1036 | ||
34dc7c2f | 1037 | zio_t * |
428870ff BB |
1038 | zio_free_sync(zio_t *pio, spa_t *spa, uint64_t txg, const blkptr_t *bp, |
1039 | enum zio_flag flags) | |
34dc7c2f BB |
1040 | { |
1041 | zio_t *zio; | |
2883cad5 | 1042 | enum zio_stage stage = ZIO_FREE_PIPELINE; |
34dc7c2f | 1043 | |
428870ff BB |
1044 | ASSERT(!BP_IS_HOLE(bp)); |
1045 | ASSERT(spa_syncing_txg(spa) == txg); | |
55d85d5a | 1046 | ASSERT(spa_sync_pass(spa) < zfs_sync_pass_deferred_free); |
34dc7c2f | 1047 | |
9b67f605 MA |
1048 | if (BP_IS_EMBEDDED(bp)) |
1049 | return (zio_null(pio, spa, NULL, NULL, NULL, 0)); | |
1050 | ||
13fe0198 | 1051 | metaslab_check_free(spa, bp); |
8c841793 | 1052 | arc_freed(spa, bp); |
13fe0198 | 1053 | |
2883cad5 MA |
1054 | /* |
1055 | * GANG and DEDUP blocks can induce a read (for the gang block header, | |
1056 | * or the DDT), so issue them asynchronously so that this thread is | |
1057 | * not tied up. | |
1058 | */ | |
1059 | if (BP_IS_GANG(bp) || BP_GET_DEDUP(bp)) | |
1060 | stage |= ZIO_STAGE_ISSUE_ASYNC; | |
1061 | ||
b128c09f | 1062 | zio = zio_create(pio, spa, txg, bp, NULL, BP_GET_PSIZE(bp), |
2aa34383 DK |
1063 | BP_GET_PSIZE(bp), NULL, NULL, ZIO_TYPE_FREE, ZIO_PRIORITY_NOW, |
1064 | flags, NULL, 0, NULL, ZIO_STAGE_OPEN, stage); | |
2883cad5 | 1065 | |
34dc7c2f BB |
1066 | return (zio); |
1067 | } | |
1068 | ||
1069 | zio_t * | |
428870ff BB |
1070 | zio_claim(zio_t *pio, spa_t *spa, uint64_t txg, const blkptr_t *bp, |
1071 | zio_done_func_t *done, void *private, enum zio_flag flags) | |
34dc7c2f BB |
1072 | { |
1073 | zio_t *zio; | |
1074 | ||
9b67f605 MA |
1075 | dprintf_bp(bp, "claiming in txg %llu", txg); |
1076 | ||
1077 | if (BP_IS_EMBEDDED(bp)) | |
1078 | return (zio_null(pio, spa, NULL, NULL, NULL, 0)); | |
1079 | ||
34dc7c2f BB |
1080 | /* |
1081 | * A claim is an allocation of a specific block. Claims are needed | |
1082 | * to support immediate writes in the intent log. The issue is that | |
1083 | * immediate writes contain committed data, but in a txg that was | |
1084 | * *not* committed. Upon opening the pool after an unclean shutdown, | |
1085 | * the intent log claims all blocks that contain immediate write data | |
1086 | * so that the SPA knows they're in use. | |
1087 | * | |
1088 | * All claims *must* be resolved in the first txg -- before the SPA | |
1089 | * starts allocating blocks -- so that nothing is allocated twice. | |
428870ff | 1090 | * If txg == 0 we just verify that the block is claimable. |
34dc7c2f BB |
1091 | */ |
1092 | ASSERT3U(spa->spa_uberblock.ub_rootbp.blk_birth, <, spa_first_txg(spa)); | |
428870ff BB |
1093 | ASSERT(txg == spa_first_txg(spa) || txg == 0); |
1094 | ASSERT(!BP_GET_DEDUP(bp) || !spa_writeable(spa)); /* zdb(1M) */ | |
34dc7c2f | 1095 | |
b128c09f | 1096 | zio = zio_create(pio, spa, txg, bp, NULL, BP_GET_PSIZE(bp), |
2aa34383 DK |
1097 | BP_GET_PSIZE(bp), done, private, ZIO_TYPE_CLAIM, ZIO_PRIORITY_NOW, |
1098 | flags, NULL, 0, NULL, ZIO_STAGE_OPEN, ZIO_CLAIM_PIPELINE); | |
3dfb57a3 | 1099 | ASSERT0(zio->io_queued_timestamp); |
34dc7c2f BB |
1100 | |
1101 | return (zio); | |
1102 | } | |
1103 | ||
1104 | zio_t * | |
1105 | zio_ioctl(zio_t *pio, spa_t *spa, vdev_t *vd, int cmd, | |
e8b96c60 | 1106 | zio_done_func_t *done, void *private, enum zio_flag flags) |
34dc7c2f BB |
1107 | { |
1108 | zio_t *zio; | |
1109 | int c; | |
1110 | ||
1111 | if (vd->vdev_children == 0) { | |
2aa34383 | 1112 | zio = zio_create(pio, spa, 0, NULL, NULL, 0, 0, done, private, |
e8b96c60 | 1113 | ZIO_TYPE_IOCTL, ZIO_PRIORITY_NOW, flags, vd, 0, NULL, |
34dc7c2f BB |
1114 | ZIO_STAGE_OPEN, ZIO_IOCTL_PIPELINE); |
1115 | ||
34dc7c2f BB |
1116 | zio->io_cmd = cmd; |
1117 | } else { | |
d164b209 | 1118 | zio = zio_null(pio, spa, NULL, NULL, NULL, flags); |
34dc7c2f BB |
1119 | |
1120 | for (c = 0; c < vd->vdev_children; c++) | |
1121 | zio_nowait(zio_ioctl(zio, spa, vd->vdev_child[c], cmd, | |
e8b96c60 | 1122 | done, private, flags)); |
34dc7c2f BB |
1123 | } |
1124 | ||
1125 | return (zio); | |
1126 | } | |
1127 | ||
34dc7c2f BB |
1128 | zio_t * |
1129 | zio_read_phys(zio_t *pio, vdev_t *vd, uint64_t offset, uint64_t size, | |
a6255b7f | 1130 | abd_t *data, int checksum, zio_done_func_t *done, void *private, |
e8b96c60 | 1131 | zio_priority_t priority, enum zio_flag flags, boolean_t labels) |
34dc7c2f BB |
1132 | { |
1133 | zio_t *zio; | |
34dc7c2f | 1134 | |
b128c09f BB |
1135 | ASSERT(vd->vdev_children == 0); |
1136 | ASSERT(!labels || offset + size <= VDEV_LABEL_START_SIZE || | |
1137 | offset >= vd->vdev_psize - VDEV_LABEL_END_SIZE); | |
1138 | ASSERT3U(offset + size, <=, vd->vdev_psize); | |
34dc7c2f | 1139 | |
2aa34383 DK |
1140 | zio = zio_create(pio, vd->vdev_spa, 0, NULL, data, size, size, done, |
1141 | private, ZIO_TYPE_READ, priority, flags | ZIO_FLAG_PHYSICAL, vd, | |
1142 | offset, NULL, ZIO_STAGE_OPEN, ZIO_READ_PHYS_PIPELINE); | |
34dc7c2f | 1143 | |
b128c09f | 1144 | zio->io_prop.zp_checksum = checksum; |
34dc7c2f BB |
1145 | |
1146 | return (zio); | |
1147 | } | |
1148 | ||
1149 | zio_t * | |
1150 | zio_write_phys(zio_t *pio, vdev_t *vd, uint64_t offset, uint64_t size, | |
a6255b7f | 1151 | abd_t *data, int checksum, zio_done_func_t *done, void *private, |
e8b96c60 | 1152 | zio_priority_t priority, enum zio_flag flags, boolean_t labels) |
34dc7c2f | 1153 | { |
34dc7c2f | 1154 | zio_t *zio; |
34dc7c2f | 1155 | |
b128c09f BB |
1156 | ASSERT(vd->vdev_children == 0); |
1157 | ASSERT(!labels || offset + size <= VDEV_LABEL_START_SIZE || | |
1158 | offset >= vd->vdev_psize - VDEV_LABEL_END_SIZE); | |
1159 | ASSERT3U(offset + size, <=, vd->vdev_psize); | |
34dc7c2f | 1160 | |
2aa34383 DK |
1161 | zio = zio_create(pio, vd->vdev_spa, 0, NULL, data, size, size, done, |
1162 | private, ZIO_TYPE_WRITE, priority, flags | ZIO_FLAG_PHYSICAL, vd, | |
1163 | offset, NULL, ZIO_STAGE_OPEN, ZIO_WRITE_PHYS_PIPELINE); | |
34dc7c2f | 1164 | |
b128c09f | 1165 | zio->io_prop.zp_checksum = checksum; |
34dc7c2f | 1166 | |
3c67d83a | 1167 | if (zio_checksum_table[checksum].ci_flags & ZCHECKSUM_FLAG_EMBEDDED) { |
34dc7c2f | 1168 | /* |
428870ff | 1169 | * zec checksums are necessarily destructive -- they modify |
b128c09f | 1170 | * the end of the write buffer to hold the verifier/checksum. |
34dc7c2f | 1171 | * Therefore, we must make a local copy in case the data is |
b128c09f | 1172 | * being written to multiple places in parallel. |
34dc7c2f | 1173 | */ |
a6255b7f DQ |
1174 | abd_t *wbuf = abd_alloc_sametype(data, size); |
1175 | abd_copy(wbuf, data, size); | |
1176 | ||
b128c09f | 1177 | zio_push_transform(zio, wbuf, size, size, NULL); |
34dc7c2f BB |
1178 | } |
1179 | ||
1180 | return (zio); | |
1181 | } | |
1182 | ||
1183 | /* | |
b128c09f | 1184 | * Create a child I/O to do some work for us. |
34dc7c2f BB |
1185 | */ |
1186 | zio_t * | |
b128c09f | 1187 | zio_vdev_child_io(zio_t *pio, blkptr_t *bp, vdev_t *vd, uint64_t offset, |
4ea3f864 GM |
1188 | abd_t *data, uint64_t size, int type, zio_priority_t priority, |
1189 | enum zio_flag flags, zio_done_func_t *done, void *private) | |
34dc7c2f | 1190 | { |
428870ff | 1191 | enum zio_stage pipeline = ZIO_VDEV_CHILD_PIPELINE; |
b128c09f BB |
1192 | zio_t *zio; |
1193 | ||
1194 | ASSERT(vd->vdev_parent == | |
1195 | (pio->io_vd ? pio->io_vd : pio->io_spa->spa_root_vdev)); | |
34dc7c2f BB |
1196 | |
1197 | if (type == ZIO_TYPE_READ && bp != NULL) { | |
1198 | /* | |
1199 | * If we have the bp, then the child should perform the | |
1200 | * checksum and the parent need not. This pushes error | |
1201 | * detection as close to the leaves as possible and | |
1202 | * eliminates redundant checksums in the interior nodes. | |
1203 | */ | |
428870ff BB |
1204 | pipeline |= ZIO_STAGE_CHECKSUM_VERIFY; |
1205 | pio->io_pipeline &= ~ZIO_STAGE_CHECKSUM_VERIFY; | |
34dc7c2f BB |
1206 | } |
1207 | ||
b128c09f BB |
1208 | if (vd->vdev_children == 0) |
1209 | offset += VDEV_LABEL_START_SIZE; | |
1210 | ||
428870ff BB |
1211 | flags |= ZIO_VDEV_CHILD_FLAGS(pio) | ZIO_FLAG_DONT_PROPAGATE; |
1212 | ||
1213 | /* | |
1214 | * If we've decided to do a repair, the write is not speculative -- | |
1215 | * even if the original read was. | |
1216 | */ | |
1217 | if (flags & ZIO_FLAG_IO_REPAIR) | |
1218 | flags &= ~ZIO_FLAG_SPECULATIVE; | |
1219 | ||
3dfb57a3 DB |
1220 | /* |
1221 | * If we're creating a child I/O that is not associated with a | |
1222 | * top-level vdev, then the child zio is not an allocating I/O. | |
1223 | * If this is a retried I/O then we ignore it since we will | |
1224 | * have already processed the original allocating I/O. | |
1225 | */ | |
1226 | if (flags & ZIO_FLAG_IO_ALLOCATING && | |
1227 | (vd != vd->vdev_top || (flags & ZIO_FLAG_IO_RETRY))) { | |
6d00b5e1 | 1228 | ASSERTV(metaslab_class_t *mc = spa_normal_class(pio->io_spa)); |
3dfb57a3 DB |
1229 | |
1230 | ASSERT(mc->mc_alloc_throttle_enabled); | |
1231 | ASSERT(type == ZIO_TYPE_WRITE); | |
1232 | ASSERT(priority == ZIO_PRIORITY_ASYNC_WRITE); | |
1233 | ASSERT(!(flags & ZIO_FLAG_IO_REPAIR)); | |
1234 | ASSERT(!(pio->io_flags & ZIO_FLAG_IO_REWRITE) || | |
1235 | pio->io_child_type == ZIO_CHILD_GANG); | |
1236 | ||
1237 | flags &= ~ZIO_FLAG_IO_ALLOCATING; | |
1238 | } | |
1239 | ||
1240 | ||
2aa34383 | 1241 | zio = zio_create(pio, pio->io_spa, pio->io_txg, bp, data, size, size, |
428870ff BB |
1242 | done, private, type, priority, flags, vd, offset, &pio->io_bookmark, |
1243 | ZIO_STAGE_VDEV_IO_START >> 1, pipeline); | |
3dfb57a3 | 1244 | ASSERT3U(zio->io_child_type, ==, ZIO_CHILD_VDEV); |
34dc7c2f | 1245 | |
e8b96c60 MA |
1246 | zio->io_physdone = pio->io_physdone; |
1247 | if (vd->vdev_ops->vdev_op_leaf && zio->io_logical != NULL) | |
1248 | zio->io_logical->io_phys_children++; | |
1249 | ||
b128c09f | 1250 | return (zio); |
34dc7c2f BB |
1251 | } |
1252 | ||
b128c09f | 1253 | zio_t * |
a6255b7f | 1254 | zio_vdev_delegated_io(vdev_t *vd, uint64_t offset, abd_t *data, uint64_t size, |
e9aa730c GM |
1255 | int type, zio_priority_t priority, enum zio_flag flags, |
1256 | zio_done_func_t *done, void *private) | |
34dc7c2f | 1257 | { |
b128c09f | 1258 | zio_t *zio; |
34dc7c2f | 1259 | |
b128c09f | 1260 | ASSERT(vd->vdev_ops->vdev_op_leaf); |
34dc7c2f | 1261 | |
b128c09f | 1262 | zio = zio_create(NULL, vd->vdev_spa, 0, NULL, |
2aa34383 | 1263 | data, size, size, done, private, type, priority, |
e8b96c60 | 1264 | flags | ZIO_FLAG_CANFAIL | ZIO_FLAG_DONT_RETRY | ZIO_FLAG_DELEGATED, |
b128c09f | 1265 | vd, offset, NULL, |
428870ff | 1266 | ZIO_STAGE_VDEV_IO_START >> 1, ZIO_VDEV_CHILD_PIPELINE); |
34dc7c2f | 1267 | |
b128c09f | 1268 | return (zio); |
34dc7c2f BB |
1269 | } |
1270 | ||
1271 | void | |
b128c09f | 1272 | zio_flush(zio_t *zio, vdev_t *vd) |
34dc7c2f | 1273 | { |
b128c09f | 1274 | zio_nowait(zio_ioctl(zio, zio->io_spa, vd, DKIOCFLUSHWRITECACHE, |
e8b96c60 | 1275 | NULL, NULL, |
b128c09f | 1276 | ZIO_FLAG_CANFAIL | ZIO_FLAG_DONT_PROPAGATE | ZIO_FLAG_DONT_RETRY)); |
34dc7c2f BB |
1277 | } |
1278 | ||
428870ff BB |
1279 | void |
1280 | zio_shrink(zio_t *zio, uint64_t size) | |
1281 | { | |
1282 | ASSERT(zio->io_executor == NULL); | |
1283 | ASSERT(zio->io_orig_size == zio->io_size); | |
1284 | ASSERT(size <= zio->io_size); | |
1285 | ||
1286 | /* | |
1287 | * We don't shrink for raidz because of problems with the | |
1288 | * reconstruction when reading back less than the block size. | |
1289 | * Note, BP_IS_RAIDZ() assumes no compression. | |
1290 | */ | |
1291 | ASSERT(BP_GET_COMPRESS(zio->io_bp) == ZIO_COMPRESS_OFF); | |
2aa34383 DK |
1292 | if (!BP_IS_RAIDZ(zio->io_bp)) { |
1293 | /* we are not doing a raw write */ | |
1294 | ASSERT3U(zio->io_size, ==, zio->io_lsize); | |
1295 | zio->io_orig_size = zio->io_size = zio->io_lsize = size; | |
1296 | } | |
428870ff BB |
1297 | } |
1298 | ||
34dc7c2f BB |
1299 | /* |
1300 | * ========================================================================== | |
b128c09f | 1301 | * Prepare to read and write logical blocks |
34dc7c2f BB |
1302 | * ========================================================================== |
1303 | */ | |
b128c09f | 1304 | |
34dc7c2f | 1305 | static int |
b128c09f | 1306 | zio_read_bp_init(zio_t *zio) |
34dc7c2f | 1307 | { |
b128c09f | 1308 | blkptr_t *bp = zio->io_bp; |
b5256303 TC |
1309 | uint64_t psize = |
1310 | BP_IS_EMBEDDED(bp) ? BPE_GET_PSIZE(bp) : BP_GET_PSIZE(bp); | |
34dc7c2f | 1311 | |
fb5f0bc8 | 1312 | if (BP_GET_COMPRESS(bp) != ZIO_COMPRESS_OFF && |
9babb374 | 1313 | zio->io_child_type == ZIO_CHILD_LOGICAL && |
b5256303 | 1314 | !(zio->io_flags & ZIO_FLAG_RAW_COMPRESS)) { |
a6255b7f DQ |
1315 | zio_push_transform(zio, abd_alloc_sametype(zio->io_abd, psize), |
1316 | psize, psize, zio_decompress); | |
34dc7c2f | 1317 | } |
34dc7c2f | 1318 | |
b5256303 TC |
1319 | if (((BP_IS_PROTECTED(bp) && !(zio->io_flags & ZIO_FLAG_RAW_ENCRYPT)) || |
1320 | BP_HAS_INDIRECT_MAC_CKSUM(bp)) && | |
1321 | zio->io_child_type == ZIO_CHILD_LOGICAL) { | |
1322 | zio_push_transform(zio, abd_alloc_sametype(zio->io_abd, psize), | |
1323 | psize, psize, zio_decrypt); | |
1324 | } | |
1325 | ||
9b67f605 | 1326 | if (BP_IS_EMBEDDED(bp) && BPE_GET_ETYPE(bp) == BP_EMBEDDED_TYPE_DATA) { |
a6255b7f DQ |
1327 | int psize = BPE_GET_PSIZE(bp); |
1328 | void *data = abd_borrow_buf(zio->io_abd, psize); | |
1329 | ||
9b67f605 | 1330 | zio->io_pipeline = ZIO_INTERLOCK_PIPELINE; |
a6255b7f DQ |
1331 | decode_embedded_bp_compressed(bp, data); |
1332 | abd_return_buf_copy(zio->io_abd, data, psize); | |
9b67f605 MA |
1333 | } else { |
1334 | ASSERT(!BP_IS_EMBEDDED(bp)); | |
1335 | } | |
1336 | ||
9ae529ec | 1337 | if (!DMU_OT_IS_METADATA(BP_GET_TYPE(bp)) && BP_GET_LEVEL(bp) == 0) |
b128c09f BB |
1338 | zio->io_flags |= ZIO_FLAG_DONT_CACHE; |
1339 | ||
428870ff BB |
1340 | if (BP_GET_TYPE(bp) == DMU_OT_DDT_ZAP) |
1341 | zio->io_flags |= ZIO_FLAG_DONT_CACHE; | |
1342 | ||
1343 | if (BP_GET_DEDUP(bp) && zio->io_child_type == ZIO_CHILD_LOGICAL) | |
1344 | zio->io_pipeline = ZIO_DDT_READ_PIPELINE; | |
1345 | ||
b128c09f | 1346 | return (ZIO_PIPELINE_CONTINUE); |
34dc7c2f BB |
1347 | } |
1348 | ||
b128c09f BB |
1349 | static int |
1350 | zio_write_bp_init(zio_t *zio) | |
34dc7c2f | 1351 | { |
b128c09f BB |
1352 | if (!IO_IS_ALLOCATING(zio)) |
1353 | return (ZIO_PIPELINE_CONTINUE); | |
34dc7c2f | 1354 | |
428870ff BB |
1355 | ASSERT(zio->io_child_type != ZIO_CHILD_DDT); |
1356 | ||
1357 | if (zio->io_bp_override) { | |
3dfb57a3 DB |
1358 | blkptr_t *bp = zio->io_bp; |
1359 | zio_prop_t *zp = &zio->io_prop; | |
1360 | ||
428870ff BB |
1361 | ASSERT(bp->blk_birth != zio->io_txg); |
1362 | ASSERT(BP_GET_DEDUP(zio->io_bp_override) == 0); | |
1363 | ||
1364 | *bp = *zio->io_bp_override; | |
1365 | zio->io_pipeline = ZIO_INTERLOCK_PIPELINE; | |
1366 | ||
9b67f605 MA |
1367 | if (BP_IS_EMBEDDED(bp)) |
1368 | return (ZIO_PIPELINE_CONTINUE); | |
1369 | ||
03c6040b GW |
1370 | /* |
1371 | * If we've been overridden and nopwrite is set then | |
1372 | * set the flag accordingly to indicate that a nopwrite | |
1373 | * has already occurred. | |
1374 | */ | |
1375 | if (!BP_IS_HOLE(bp) && zp->zp_nopwrite) { | |
1376 | ASSERT(!zp->zp_dedup); | |
3dfb57a3 | 1377 | ASSERT3U(BP_GET_CHECKSUM(bp), ==, zp->zp_checksum); |
03c6040b GW |
1378 | zio->io_flags |= ZIO_FLAG_NOPWRITE; |
1379 | return (ZIO_PIPELINE_CONTINUE); | |
1380 | } | |
1381 | ||
1382 | ASSERT(!zp->zp_nopwrite); | |
1383 | ||
428870ff BB |
1384 | if (BP_IS_HOLE(bp) || !zp->zp_dedup) |
1385 | return (ZIO_PIPELINE_CONTINUE); | |
1386 | ||
3c67d83a TH |
1387 | ASSERT((zio_checksum_table[zp->zp_checksum].ci_flags & |
1388 | ZCHECKSUM_FLAG_DEDUP) || zp->zp_dedup_verify); | |
428870ff | 1389 | |
b5256303 TC |
1390 | if (BP_GET_CHECKSUM(bp) == zp->zp_checksum && |
1391 | !zp->zp_encrypt) { | |
428870ff BB |
1392 | BP_SET_DEDUP(bp, 1); |
1393 | zio->io_pipeline |= ZIO_STAGE_DDT_WRITE; | |
1394 | return (ZIO_PIPELINE_CONTINUE); | |
1395 | } | |
3dfb57a3 DB |
1396 | |
1397 | /* | |
1398 | * We were unable to handle this as an override bp, treat | |
1399 | * it as a regular write I/O. | |
1400 | */ | |
5511754b | 1401 | zio->io_bp_override = NULL; |
3dfb57a3 DB |
1402 | *bp = zio->io_bp_orig; |
1403 | zio->io_pipeline = zio->io_orig_pipeline; | |
1404 | } | |
1405 | ||
1406 | return (ZIO_PIPELINE_CONTINUE); | |
1407 | } | |
1408 | ||
1409 | static int | |
1410 | zio_write_compress(zio_t *zio) | |
1411 | { | |
1412 | spa_t *spa = zio->io_spa; | |
1413 | zio_prop_t *zp = &zio->io_prop; | |
1414 | enum zio_compress compress = zp->zp_compress; | |
1415 | blkptr_t *bp = zio->io_bp; | |
1416 | uint64_t lsize = zio->io_lsize; | |
1417 | uint64_t psize = zio->io_size; | |
1418 | int pass = 1; | |
1419 | ||
3dfb57a3 DB |
1420 | /* |
1421 | * If our children haven't all reached the ready stage, | |
1422 | * wait for them and then repeat this pipeline stage. | |
1423 | */ | |
1424 | if (zio_wait_for_children(zio, ZIO_CHILD_GANG, ZIO_WAIT_READY) || | |
1425 | zio_wait_for_children(zio, ZIO_CHILD_LOGICAL, ZIO_WAIT_READY)) | |
1426 | return (ZIO_PIPELINE_STOP); | |
1427 | ||
1428 | if (!IO_IS_ALLOCATING(zio)) | |
1429 | return (ZIO_PIPELINE_CONTINUE); | |
1430 | ||
1431 | if (zio->io_children_ready != NULL) { | |
1432 | /* | |
1433 | * Now that all our children are ready, run the callback | |
1434 | * associated with this zio in case it wants to modify the | |
1435 | * data to be written. | |
1436 | */ | |
1437 | ASSERT3U(zp->zp_level, >, 0); | |
1438 | zio->io_children_ready(zio); | |
428870ff | 1439 | } |
34dc7c2f | 1440 | |
3dfb57a3 DB |
1441 | ASSERT(zio->io_child_type != ZIO_CHILD_DDT); |
1442 | ASSERT(zio->io_bp_override == NULL); | |
1443 | ||
b0bc7a84 | 1444 | if (!BP_IS_HOLE(bp) && bp->blk_birth == zio->io_txg) { |
b128c09f BB |
1445 | /* |
1446 | * We're rewriting an existing block, which means we're | |
1447 | * working on behalf of spa_sync(). For spa_sync() to | |
1448 | * converge, it must eventually be the case that we don't | |
1449 | * have to allocate new blocks. But compression changes | |
1450 | * the blocksize, which forces a reallocate, and makes | |
1451 | * convergence take longer. Therefore, after the first | |
1452 | * few passes, stop compressing to ensure convergence. | |
1453 | */ | |
428870ff BB |
1454 | pass = spa_sync_pass(spa); |
1455 | ||
1456 | ASSERT(zio->io_txg == spa_syncing_txg(spa)); | |
1457 | ASSERT(zio->io_child_type == ZIO_CHILD_LOGICAL); | |
1458 | ASSERT(!BP_GET_DEDUP(bp)); | |
34dc7c2f | 1459 | |
55d85d5a | 1460 | if (pass >= zfs_sync_pass_dont_compress) |
b128c09f | 1461 | compress = ZIO_COMPRESS_OFF; |
34dc7c2f | 1462 | |
b128c09f | 1463 | /* Make sure someone doesn't change their mind on overwrites */ |
9b67f605 | 1464 | ASSERT(BP_IS_EMBEDDED(bp) || MIN(zp->zp_copies + BP_IS_GANG(bp), |
428870ff | 1465 | spa_max_replication(spa)) == BP_GET_NDVAS(bp)); |
b128c09f | 1466 | } |
34dc7c2f | 1467 | |
2aa34383 | 1468 | /* If it's a compressed write that is not raw, compress the buffer. */ |
b5256303 TC |
1469 | if (compress != ZIO_COMPRESS_OFF && |
1470 | !(zio->io_flags & ZIO_FLAG_RAW_COMPRESS)) { | |
428870ff | 1471 | void *cbuf = zio_buf_alloc(lsize); |
a6255b7f | 1472 | psize = zio_compress_data(compress, zio->io_abd, cbuf, lsize); |
428870ff | 1473 | if (psize == 0 || psize == lsize) { |
b128c09f | 1474 | compress = ZIO_COMPRESS_OFF; |
428870ff | 1475 | zio_buf_free(cbuf, lsize); |
b5256303 TC |
1476 | } else if (!zp->zp_dedup && !zp->zp_encrypt && |
1477 | psize <= BPE_PAYLOAD_SIZE && | |
9b67f605 MA |
1478 | zp->zp_level == 0 && !DMU_OT_HAS_FILL(zp->zp_type) && |
1479 | spa_feature_is_enabled(spa, SPA_FEATURE_EMBEDDED_DATA)) { | |
1480 | encode_embedded_bp_compressed(bp, | |
1481 | cbuf, compress, lsize, psize); | |
1482 | BPE_SET_ETYPE(bp, BP_EMBEDDED_TYPE_DATA); | |
1483 | BP_SET_TYPE(bp, zio->io_prop.zp_type); | |
1484 | BP_SET_LEVEL(bp, zio->io_prop.zp_level); | |
1485 | zio_buf_free(cbuf, lsize); | |
1486 | bp->blk_birth = zio->io_txg; | |
1487 | zio->io_pipeline = ZIO_INTERLOCK_PIPELINE; | |
1488 | ASSERT(spa_feature_is_active(spa, | |
1489 | SPA_FEATURE_EMBEDDED_DATA)); | |
1490 | return (ZIO_PIPELINE_CONTINUE); | |
428870ff | 1491 | } else { |
9b67f605 | 1492 | /* |
c3520e7f MA |
1493 | * Round up compressed size up to the ashift |
1494 | * of the smallest-ashift device, and zero the tail. | |
1495 | * This ensures that the compressed size of the BP | |
1496 | * (and thus compressratio property) are correct, | |
1497 | * in that we charge for the padding used to fill out | |
1498 | * the last sector. | |
9b67f605 | 1499 | */ |
c3520e7f | 1500 | ASSERT3U(spa->spa_min_ashift, >=, SPA_MINBLOCKSHIFT); |
1c27024e | 1501 | size_t rounded = (size_t)P2ROUNDUP(psize, |
c3520e7f MA |
1502 | 1ULL << spa->spa_min_ashift); |
1503 | if (rounded >= lsize) { | |
9b67f605 MA |
1504 | compress = ZIO_COMPRESS_OFF; |
1505 | zio_buf_free(cbuf, lsize); | |
c3520e7f | 1506 | psize = lsize; |
9b67f605 | 1507 | } else { |
a6255b7f DQ |
1508 | abd_t *cdata = abd_get_from_buf(cbuf, lsize); |
1509 | abd_take_ownership_of_buf(cdata, B_TRUE); | |
1510 | abd_zero_off(cdata, psize, rounded - psize); | |
c3520e7f | 1511 | psize = rounded; |
a6255b7f | 1512 | zio_push_transform(zio, cdata, |
9b67f605 MA |
1513 | psize, lsize, NULL); |
1514 | } | |
b128c09f | 1515 | } |
3dfb57a3 DB |
1516 | |
1517 | /* | |
1518 | * We were unable to handle this as an override bp, treat | |
1519 | * it as a regular write I/O. | |
1520 | */ | |
1521 | zio->io_bp_override = NULL; | |
1522 | *bp = zio->io_bp_orig; | |
1523 | zio->io_pipeline = zio->io_orig_pipeline; | |
1524 | ||
2aa34383 DK |
1525 | } else { |
1526 | ASSERT3U(psize, !=, 0); | |
1527 | ||
b128c09f | 1528 | } |
34dc7c2f | 1529 | |
b128c09f BB |
1530 | /* |
1531 | * The final pass of spa_sync() must be all rewrites, but the first | |
1532 | * few passes offer a trade-off: allocating blocks defers convergence, | |
1533 | * but newly allocated blocks are sequential, so they can be written | |
1534 | * to disk faster. Therefore, we allow the first few passes of | |
1535 | * spa_sync() to allocate new blocks, but force rewrites after that. | |
1536 | * There should only be a handful of blocks after pass 1 in any case. | |
1537 | */ | |
b0bc7a84 MG |
1538 | if (!BP_IS_HOLE(bp) && bp->blk_birth == zio->io_txg && |
1539 | BP_GET_PSIZE(bp) == psize && | |
55d85d5a | 1540 | pass >= zfs_sync_pass_rewrite) { |
d6320ddb | 1541 | ASSERT(psize != 0); |
1c27024e | 1542 | enum zio_stage gang_stages = zio->io_pipeline & ZIO_GANG_STAGES; |
b128c09f BB |
1543 | zio->io_pipeline = ZIO_REWRITE_PIPELINE | gang_stages; |
1544 | zio->io_flags |= ZIO_FLAG_IO_REWRITE; | |
1545 | } else { | |
1546 | BP_ZERO(bp); | |
1547 | zio->io_pipeline = ZIO_WRITE_PIPELINE; | |
1548 | } | |
34dc7c2f | 1549 | |
428870ff | 1550 | if (psize == 0) { |
b0bc7a84 MG |
1551 | if (zio->io_bp_orig.blk_birth != 0 && |
1552 | spa_feature_is_active(spa, SPA_FEATURE_HOLE_BIRTH)) { | |
1553 | BP_SET_LSIZE(bp, lsize); | |
1554 | BP_SET_TYPE(bp, zp->zp_type); | |
1555 | BP_SET_LEVEL(bp, zp->zp_level); | |
1556 | BP_SET_BIRTH(bp, zio->io_txg, 0); | |
1557 | } | |
b128c09f BB |
1558 | zio->io_pipeline = ZIO_INTERLOCK_PIPELINE; |
1559 | } else { | |
1560 | ASSERT(zp->zp_checksum != ZIO_CHECKSUM_GANG_HEADER); | |
1561 | BP_SET_LSIZE(bp, lsize); | |
b0bc7a84 MG |
1562 | BP_SET_TYPE(bp, zp->zp_type); |
1563 | BP_SET_LEVEL(bp, zp->zp_level); | |
428870ff | 1564 | BP_SET_PSIZE(bp, psize); |
b128c09f BB |
1565 | BP_SET_COMPRESS(bp, compress); |
1566 | BP_SET_CHECKSUM(bp, zp->zp_checksum); | |
428870ff | 1567 | BP_SET_DEDUP(bp, zp->zp_dedup); |
b128c09f | 1568 | BP_SET_BYTEORDER(bp, ZFS_HOST_BYTEORDER); |
428870ff BB |
1569 | if (zp->zp_dedup) { |
1570 | ASSERT(zio->io_child_type == ZIO_CHILD_LOGICAL); | |
1571 | ASSERT(!(zio->io_flags & ZIO_FLAG_IO_REWRITE)); | |
b5256303 TC |
1572 | ASSERT(!zp->zp_encrypt || |
1573 | DMU_OT_IS_ENCRYPTED(zp->zp_type)); | |
428870ff BB |
1574 | zio->io_pipeline = ZIO_DDT_WRITE_PIPELINE; |
1575 | } | |
03c6040b GW |
1576 | if (zp->zp_nopwrite) { |
1577 | ASSERT(zio->io_child_type == ZIO_CHILD_LOGICAL); | |
1578 | ASSERT(!(zio->io_flags & ZIO_FLAG_IO_REWRITE)); | |
1579 | zio->io_pipeline |= ZIO_STAGE_NOP_WRITE; | |
1580 | } | |
428870ff | 1581 | } |
428870ff BB |
1582 | return (ZIO_PIPELINE_CONTINUE); |
1583 | } | |
1584 | ||
1585 | static int | |
1586 | zio_free_bp_init(zio_t *zio) | |
1587 | { | |
1588 | blkptr_t *bp = zio->io_bp; | |
1589 | ||
1590 | if (zio->io_child_type == ZIO_CHILD_LOGICAL) { | |
1591 | if (BP_GET_DEDUP(bp)) | |
1592 | zio->io_pipeline = ZIO_DDT_FREE_PIPELINE; | |
b128c09f | 1593 | } |
34dc7c2f BB |
1594 | |
1595 | return (ZIO_PIPELINE_CONTINUE); | |
1596 | } | |
1597 | ||
b128c09f BB |
1598 | /* |
1599 | * ========================================================================== | |
1600 | * Execute the I/O pipeline | |
1601 | * ========================================================================== | |
1602 | */ | |
1603 | ||
1604 | static void | |
7ef5e54e | 1605 | zio_taskq_dispatch(zio_t *zio, zio_taskq_type_t q, boolean_t cutinline) |
34dc7c2f | 1606 | { |
428870ff | 1607 | spa_t *spa = zio->io_spa; |
b128c09f | 1608 | zio_type_t t = zio->io_type; |
a38718a6 | 1609 | int flags = (cutinline ? TQ_FRONT : 0); |
34dc7c2f BB |
1610 | |
1611 | /* | |
9babb374 BB |
1612 | * If we're a config writer or a probe, the normal issue and |
1613 | * interrupt threads may all be blocked waiting for the config lock. | |
1614 | * In this case, select the otherwise-unused taskq for ZIO_TYPE_NULL. | |
34dc7c2f | 1615 | */ |
9babb374 | 1616 | if (zio->io_flags & (ZIO_FLAG_CONFIG_WRITER | ZIO_FLAG_PROBE)) |
b128c09f | 1617 | t = ZIO_TYPE_NULL; |
34dc7c2f BB |
1618 | |
1619 | /* | |
b128c09f | 1620 | * A similar issue exists for the L2ARC write thread until L2ARC 2.0. |
34dc7c2f | 1621 | */ |
b128c09f BB |
1622 | if (t == ZIO_TYPE_WRITE && zio->io_vd && zio->io_vd->vdev_aux) |
1623 | t = ZIO_TYPE_NULL; | |
34dc7c2f | 1624 | |
428870ff | 1625 | /* |
7ef5e54e AL |
1626 | * If this is a high priority I/O, then use the high priority taskq if |
1627 | * available. | |
428870ff BB |
1628 | */ |
1629 | if (zio->io_priority == ZIO_PRIORITY_NOW && | |
7ef5e54e | 1630 | spa->spa_zio_taskq[t][q + 1].stqs_count != 0) |
428870ff BB |
1631 | q++; |
1632 | ||
1633 | ASSERT3U(q, <, ZIO_TASKQ_TYPES); | |
5cc556b4 | 1634 | |
a38718a6 GA |
1635 | /* |
1636 | * NB: We are assuming that the zio can only be dispatched | |
1637 | * to a single taskq at a time. It would be a grievous error | |
1638 | * to dispatch the zio to another taskq at the same time. | |
1639 | */ | |
1640 | ASSERT(taskq_empty_ent(&zio->io_tqent)); | |
7ef5e54e AL |
1641 | spa_taskq_dispatch_ent(spa, t, q, (task_func_t *)zio_execute, zio, |
1642 | flags, &zio->io_tqent); | |
b128c09f | 1643 | } |
34dc7c2f | 1644 | |
b128c09f | 1645 | static boolean_t |
7ef5e54e | 1646 | zio_taskq_member(zio_t *zio, zio_taskq_type_t q) |
b128c09f BB |
1647 | { |
1648 | kthread_t *executor = zio->io_executor; | |
1649 | spa_t *spa = zio->io_spa; | |
34dc7c2f | 1650 | |
1c27024e | 1651 | for (zio_type_t t = 0; t < ZIO_TYPES; t++) { |
7ef5e54e AL |
1652 | spa_taskqs_t *tqs = &spa->spa_zio_taskq[t][q]; |
1653 | uint_t i; | |
1654 | for (i = 0; i < tqs->stqs_count; i++) { | |
1655 | if (taskq_member(tqs->stqs_taskq[i], executor)) | |
1656 | return (B_TRUE); | |
1657 | } | |
1658 | } | |
34dc7c2f | 1659 | |
b128c09f BB |
1660 | return (B_FALSE); |
1661 | } | |
34dc7c2f | 1662 | |
b128c09f BB |
1663 | static int |
1664 | zio_issue_async(zio_t *zio) | |
1665 | { | |
428870ff | 1666 | zio_taskq_dispatch(zio, ZIO_TASKQ_ISSUE, B_FALSE); |
b128c09f BB |
1667 | |
1668 | return (ZIO_PIPELINE_STOP); | |
34dc7c2f BB |
1669 | } |
1670 | ||
b128c09f BB |
1671 | void |
1672 | zio_interrupt(zio_t *zio) | |
34dc7c2f | 1673 | { |
428870ff | 1674 | zio_taskq_dispatch(zio, ZIO_TASKQ_INTERRUPT, B_FALSE); |
b128c09f | 1675 | } |
34dc7c2f | 1676 | |
26ef0cc7 TH |
1677 | void |
1678 | zio_delay_interrupt(zio_t *zio) | |
1679 | { | |
1680 | /* | |
1681 | * The timeout_generic() function isn't defined in userspace, so | |
1682 | * rather than trying to implement the function, the zio delay | |
1683 | * functionality has been disabled for userspace builds. | |
1684 | */ | |
1685 | ||
1686 | #ifdef _KERNEL | |
1687 | /* | |
1688 | * If io_target_timestamp is zero, then no delay has been registered | |
1689 | * for this IO, thus jump to the end of this function and "skip" the | |
1690 | * delay; issuing it directly to the zio layer. | |
1691 | */ | |
1692 | if (zio->io_target_timestamp != 0) { | |
1693 | hrtime_t now = gethrtime(); | |
1694 | ||
1695 | if (now >= zio->io_target_timestamp) { | |
1696 | /* | |
1697 | * This IO has already taken longer than the target | |
1698 | * delay to complete, so we don't want to delay it | |
1699 | * any longer; we "miss" the delay and issue it | |
1700 | * directly to the zio layer. This is likely due to | |
1701 | * the target latency being set to a value less than | |
1702 | * the underlying hardware can satisfy (e.g. delay | |
1703 | * set to 1ms, but the disks take 10ms to complete an | |
1704 | * IO request). | |
1705 | */ | |
1706 | ||
1707 | DTRACE_PROBE2(zio__delay__miss, zio_t *, zio, | |
1708 | hrtime_t, now); | |
1709 | ||
1710 | zio_interrupt(zio); | |
1711 | } else { | |
1712 | taskqid_t tid; | |
1713 | hrtime_t diff = zio->io_target_timestamp - now; | |
1714 | clock_t expire_at_tick = ddi_get_lbolt() + | |
1715 | NSEC_TO_TICK(diff); | |
1716 | ||
1717 | DTRACE_PROBE3(zio__delay__hit, zio_t *, zio, | |
1718 | hrtime_t, now, hrtime_t, diff); | |
1719 | ||
1720 | if (NSEC_TO_TICK(diff) == 0) { | |
1721 | /* Our delay is less than a jiffy - just spin */ | |
1722 | zfs_sleep_until(zio->io_target_timestamp); | |
1723 | } else { | |
1724 | /* | |
1725 | * Use taskq_dispatch_delay() in the place of | |
1726 | * OpenZFS's timeout_generic(). | |
1727 | */ | |
1728 | tid = taskq_dispatch_delay(system_taskq, | |
02730c33 | 1729 | (task_func_t *)zio_interrupt, |
26ef0cc7 | 1730 | zio, TQ_NOSLEEP, expire_at_tick); |
48d3eb40 | 1731 | if (tid == TASKQID_INVALID) { |
26ef0cc7 TH |
1732 | /* |
1733 | * Couldn't allocate a task. Just | |
1734 | * finish the zio without a delay. | |
1735 | */ | |
1736 | zio_interrupt(zio); | |
1737 | } | |
1738 | } | |
1739 | } | |
1740 | return; | |
1741 | } | |
1742 | #endif | |
1743 | DTRACE_PROBE1(zio__delay__skip, zio_t *, zio); | |
1744 | zio_interrupt(zio); | |
1745 | } | |
1746 | ||
b128c09f BB |
1747 | /* |
1748 | * Execute the I/O pipeline until one of the following occurs: | |
1749 | * (1) the I/O completes; (2) the pipeline stalls waiting for | |
1750 | * dependent child I/Os; (3) the I/O issues, so we're waiting | |
1751 | * for an I/O completion interrupt; (4) the I/O is delegated by | |
1752 | * vdev-level caching or aggregation; (5) the I/O is deferred | |
1753 | * due to vdev-level queueing; (6) the I/O is handed off to | |
1754 | * another thread. In all cases, the pipeline stops whenever | |
8e07b99b | 1755 | * there's no CPU work; it never burns a thread in cv_wait_io(). |
b128c09f BB |
1756 | * |
1757 | * There's no locking on io_stage because there's no legitimate way | |
1758 | * for multiple threads to be attempting to process the same I/O. | |
1759 | */ | |
428870ff | 1760 | static zio_pipe_stage_t *zio_pipeline[]; |
34dc7c2f | 1761 | |
da6b4005 NB |
1762 | /* |
1763 | * zio_execute() is a wrapper around the static function | |
1764 | * __zio_execute() so that we can force __zio_execute() to be | |
1765 | * inlined. This reduces stack overhead which is important | |
1766 | * because __zio_execute() is called recursively in several zio | |
1767 | * code paths. zio_execute() itself cannot be inlined because | |
1768 | * it is externally visible. | |
1769 | */ | |
b128c09f BB |
1770 | void |
1771 | zio_execute(zio_t *zio) | |
da6b4005 | 1772 | { |
92119cc2 BB |
1773 | fstrans_cookie_t cookie; |
1774 | ||
1775 | cookie = spl_fstrans_mark(); | |
da6b4005 | 1776 | __zio_execute(zio); |
92119cc2 | 1777 | spl_fstrans_unmark(cookie); |
da6b4005 NB |
1778 | } |
1779 | ||
b58986ee BB |
1780 | /* |
1781 | * Used to determine if in the current context the stack is sized large | |
1782 | * enough to allow zio_execute() to be called recursively. A minimum | |
1783 | * stack size of 16K is required to avoid needing to re-dispatch the zio. | |
1784 | */ | |
1785 | boolean_t | |
1786 | zio_execute_stack_check(zio_t *zio) | |
1787 | { | |
1788 | #if !defined(HAVE_LARGE_STACKS) | |
1789 | dsl_pool_t *dp = spa_get_dsl(zio->io_spa); | |
1790 | ||
1791 | /* Executing in txg_sync_thread() context. */ | |
1792 | if (dp && curthread == dp->dp_tx.tx_sync_thread) | |
1793 | return (B_TRUE); | |
1794 | ||
1795 | /* Pool initialization outside of zio_taskq context. */ | |
1796 | if (dp && spa_is_initializing(dp->dp_spa) && | |
1797 | !zio_taskq_member(zio, ZIO_TASKQ_ISSUE) && | |
1798 | !zio_taskq_member(zio, ZIO_TASKQ_ISSUE_HIGH)) | |
1799 | return (B_TRUE); | |
1800 | #endif /* HAVE_LARGE_STACKS */ | |
1801 | ||
1802 | return (B_FALSE); | |
1803 | } | |
1804 | ||
da6b4005 NB |
1805 | __attribute__((always_inline)) |
1806 | static inline void | |
1807 | __zio_execute(zio_t *zio) | |
b128c09f BB |
1808 | { |
1809 | zio->io_executor = curthread; | |
34dc7c2f | 1810 | |
3dfb57a3 DB |
1811 | ASSERT3U(zio->io_queued_timestamp, >, 0); |
1812 | ||
b128c09f | 1813 | while (zio->io_stage < ZIO_STAGE_DONE) { |
428870ff BB |
1814 | enum zio_stage pipeline = zio->io_pipeline; |
1815 | enum zio_stage stage = zio->io_stage; | |
b128c09f | 1816 | int rv; |
34dc7c2f | 1817 | |
b128c09f | 1818 | ASSERT(!MUTEX_HELD(&zio->io_lock)); |
428870ff BB |
1819 | ASSERT(ISP2(stage)); |
1820 | ASSERT(zio->io_stall == NULL); | |
34dc7c2f | 1821 | |
428870ff BB |
1822 | do { |
1823 | stage <<= 1; | |
1824 | } while ((stage & pipeline) == 0); | |
b128c09f BB |
1825 | |
1826 | ASSERT(stage <= ZIO_STAGE_DONE); | |
34dc7c2f BB |
1827 | |
1828 | /* | |
b128c09f BB |
1829 | * If we are in interrupt context and this pipeline stage |
1830 | * will grab a config lock that is held across I/O, | |
428870ff BB |
1831 | * or may wait for an I/O that needs an interrupt thread |
1832 | * to complete, issue async to avoid deadlock. | |
1833 | * | |
1834 | * For VDEV_IO_START, we cut in line so that the io will | |
1835 | * be sent to disk promptly. | |
34dc7c2f | 1836 | */ |
91579709 BB |
1837 | if ((stage & ZIO_BLOCKING_STAGES) && zio->io_vd == NULL && |
1838 | zio_taskq_member(zio, ZIO_TASKQ_INTERRUPT)) { | |
b58986ee BB |
1839 | boolean_t cut = (stage == ZIO_STAGE_VDEV_IO_START) ? |
1840 | zio_requeue_io_start_cut_in_line : B_FALSE; | |
91579709 BB |
1841 | zio_taskq_dispatch(zio, ZIO_TASKQ_ISSUE, cut); |
1842 | return; | |
1843 | } | |
1844 | ||
1845 | /* | |
b58986ee BB |
1846 | * If the current context doesn't have large enough stacks |
1847 | * the zio must be issued asynchronously to prevent overflow. | |
91579709 | 1848 | */ |
b58986ee BB |
1849 | if (zio_execute_stack_check(zio)) { |
1850 | boolean_t cut = (stage == ZIO_STAGE_VDEV_IO_START) ? | |
1851 | zio_requeue_io_start_cut_in_line : B_FALSE; | |
428870ff | 1852 | zio_taskq_dispatch(zio, ZIO_TASKQ_ISSUE, cut); |
b128c09f | 1853 | return; |
34dc7c2f BB |
1854 | } |
1855 | ||
b128c09f | 1856 | zio->io_stage = stage; |
3dfb57a3 | 1857 | zio->io_pipeline_trace |= zio->io_stage; |
9bd274dd | 1858 | rv = zio_pipeline[highbit64(stage) - 1](zio); |
34dc7c2f | 1859 | |
b128c09f BB |
1860 | if (rv == ZIO_PIPELINE_STOP) |
1861 | return; | |
34dc7c2f | 1862 | |
b128c09f BB |
1863 | ASSERT(rv == ZIO_PIPELINE_CONTINUE); |
1864 | } | |
34dc7c2f BB |
1865 | } |
1866 | ||
da6b4005 | 1867 | |
b128c09f BB |
1868 | /* |
1869 | * ========================================================================== | |
1870 | * Initiate I/O, either sync or async | |
1871 | * ========================================================================== | |
1872 | */ | |
1873 | int | |
1874 | zio_wait(zio_t *zio) | |
34dc7c2f | 1875 | { |
b128c09f | 1876 | int error; |
34dc7c2f | 1877 | |
b128c09f BB |
1878 | ASSERT(zio->io_stage == ZIO_STAGE_OPEN); |
1879 | ASSERT(zio->io_executor == NULL); | |
34dc7c2f | 1880 | |
b128c09f | 1881 | zio->io_waiter = curthread; |
3dfb57a3 DB |
1882 | ASSERT0(zio->io_queued_timestamp); |
1883 | zio->io_queued_timestamp = gethrtime(); | |
34dc7c2f | 1884 | |
da6b4005 | 1885 | __zio_execute(zio); |
34dc7c2f | 1886 | |
b128c09f | 1887 | mutex_enter(&zio->io_lock); |
72f53c56 | 1888 | while (zio->io_executor != NULL) |
72938d69 | 1889 | cv_wait_io(&zio->io_cv, &zio->io_lock); |
b128c09f | 1890 | mutex_exit(&zio->io_lock); |
34dc7c2f | 1891 | |
b128c09f BB |
1892 | error = zio->io_error; |
1893 | zio_destroy(zio); | |
34dc7c2f | 1894 | |
b128c09f BB |
1895 | return (error); |
1896 | } | |
34dc7c2f | 1897 | |
b128c09f BB |
1898 | void |
1899 | zio_nowait(zio_t *zio) | |
1900 | { | |
1901 | ASSERT(zio->io_executor == NULL); | |
34dc7c2f | 1902 | |
d164b209 BB |
1903 | if (zio->io_child_type == ZIO_CHILD_LOGICAL && |
1904 | zio_unique_parent(zio) == NULL) { | |
8878261f BB |
1905 | zio_t *pio; |
1906 | ||
34dc7c2f | 1907 | /* |
b128c09f | 1908 | * This is a logical async I/O with no parent to wait for it. |
9babb374 BB |
1909 | * We add it to the spa_async_root_zio "Godfather" I/O which |
1910 | * will ensure they complete prior to unloading the pool. | |
34dc7c2f | 1911 | */ |
b128c09f | 1912 | spa_t *spa = zio->io_spa; |
8878261f BB |
1913 | kpreempt_disable(); |
1914 | pio = spa->spa_async_zio_root[CPU_SEQID]; | |
1915 | kpreempt_enable(); | |
9babb374 | 1916 | |
8878261f | 1917 | zio_add_child(pio, zio); |
b128c09f | 1918 | } |
34dc7c2f | 1919 | |
3dfb57a3 DB |
1920 | ASSERT0(zio->io_queued_timestamp); |
1921 | zio->io_queued_timestamp = gethrtime(); | |
da6b4005 | 1922 | __zio_execute(zio); |
b128c09f | 1923 | } |
34dc7c2f | 1924 | |
b128c09f BB |
1925 | /* |
1926 | * ========================================================================== | |
1927 | * Reexecute or suspend/resume failed I/O | |
1928 | * ========================================================================== | |
1929 | */ | |
34dc7c2f | 1930 | |
b128c09f BB |
1931 | static void |
1932 | zio_reexecute(zio_t *pio) | |
1933 | { | |
d164b209 BB |
1934 | zio_t *cio, *cio_next; |
1935 | ||
1936 | ASSERT(pio->io_child_type == ZIO_CHILD_LOGICAL); | |
1937 | ASSERT(pio->io_orig_stage == ZIO_STAGE_OPEN); | |
9babb374 BB |
1938 | ASSERT(pio->io_gang_leader == NULL); |
1939 | ASSERT(pio->io_gang_tree == NULL); | |
34dc7c2f | 1940 | |
b128c09f BB |
1941 | pio->io_flags = pio->io_orig_flags; |
1942 | pio->io_stage = pio->io_orig_stage; | |
1943 | pio->io_pipeline = pio->io_orig_pipeline; | |
1944 | pio->io_reexecute = 0; | |
03c6040b | 1945 | pio->io_flags |= ZIO_FLAG_REEXECUTED; |
3dfb57a3 | 1946 | pio->io_pipeline_trace = 0; |
b128c09f | 1947 | pio->io_error = 0; |
1c27024e | 1948 | for (int w = 0; w < ZIO_WAIT_TYPES; w++) |
d164b209 | 1949 | pio->io_state[w] = 0; |
1c27024e | 1950 | for (int c = 0; c < ZIO_CHILD_TYPES; c++) |
b128c09f | 1951 | pio->io_child_error[c] = 0; |
34dc7c2f | 1952 | |
428870ff BB |
1953 | if (IO_IS_ALLOCATING(pio)) |
1954 | BP_ZERO(pio->io_bp); | |
34dc7c2f | 1955 | |
b128c09f BB |
1956 | /* |
1957 | * As we reexecute pio's children, new children could be created. | |
d164b209 | 1958 | * New children go to the head of pio's io_child_list, however, |
b128c09f | 1959 | * so we will (correctly) not reexecute them. The key is that |
d164b209 BB |
1960 | * the remainder of pio's io_child_list, from 'cio_next' onward, |
1961 | * cannot be affected by any side effects of reexecuting 'cio'. | |
b128c09f | 1962 | */ |
1c27024e | 1963 | zio_link_t *zl = NULL; |
3dfb57a3 DB |
1964 | for (cio = zio_walk_children(pio, &zl); cio != NULL; cio = cio_next) { |
1965 | cio_next = zio_walk_children(pio, &zl); | |
b128c09f | 1966 | mutex_enter(&pio->io_lock); |
1c27024e | 1967 | for (int w = 0; w < ZIO_WAIT_TYPES; w++) |
d164b209 | 1968 | pio->io_children[cio->io_child_type][w]++; |
b128c09f | 1969 | mutex_exit(&pio->io_lock); |
d164b209 | 1970 | zio_reexecute(cio); |
34dc7c2f | 1971 | } |
34dc7c2f | 1972 | |
b128c09f BB |
1973 | /* |
1974 | * Now that all children have been reexecuted, execute the parent. | |
9babb374 | 1975 | * We don't reexecute "The Godfather" I/O here as it's the |
9e2c3bb4 | 1976 | * responsibility of the caller to wait on it. |
b128c09f | 1977 | */ |
3dfb57a3 DB |
1978 | if (!(pio->io_flags & ZIO_FLAG_GODFATHER)) { |
1979 | pio->io_queued_timestamp = gethrtime(); | |
da6b4005 | 1980 | __zio_execute(pio); |
3dfb57a3 | 1981 | } |
34dc7c2f BB |
1982 | } |
1983 | ||
b128c09f BB |
1984 | void |
1985 | zio_suspend(spa_t *spa, zio_t *zio) | |
34dc7c2f | 1986 | { |
b128c09f BB |
1987 | if (spa_get_failmode(spa) == ZIO_FAILURE_MODE_PANIC) |
1988 | fm_panic("Pool '%s' has encountered an uncorrectable I/O " | |
1989 | "failure and the failure mode property for this pool " | |
1990 | "is set to panic.", spa_name(spa)); | |
34dc7c2f | 1991 | |
bf89c199 BB |
1992 | cmn_err(CE_WARN, "Pool '%s' has encountered an uncorrectable I/O " |
1993 | "failure and has been suspended.\n", spa_name(spa)); | |
1994 | ||
b5256303 TC |
1995 | zfs_ereport_post(FM_EREPORT_ZFS_IO_FAILURE, spa, NULL, |
1996 | NULL, NULL, 0, 0); | |
34dc7c2f | 1997 | |
b128c09f | 1998 | mutex_enter(&spa->spa_suspend_lock); |
34dc7c2f | 1999 | |
b128c09f | 2000 | if (spa->spa_suspend_zio_root == NULL) |
9babb374 BB |
2001 | spa->spa_suspend_zio_root = zio_root(spa, NULL, NULL, |
2002 | ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE | | |
2003 | ZIO_FLAG_GODFATHER); | |
34dc7c2f | 2004 | |
b128c09f | 2005 | spa->spa_suspended = B_TRUE; |
34dc7c2f | 2006 | |
b128c09f | 2007 | if (zio != NULL) { |
9babb374 | 2008 | ASSERT(!(zio->io_flags & ZIO_FLAG_GODFATHER)); |
b128c09f BB |
2009 | ASSERT(zio != spa->spa_suspend_zio_root); |
2010 | ASSERT(zio->io_child_type == ZIO_CHILD_LOGICAL); | |
d164b209 | 2011 | ASSERT(zio_unique_parent(zio) == NULL); |
b128c09f BB |
2012 | ASSERT(zio->io_stage == ZIO_STAGE_DONE); |
2013 | zio_add_child(spa->spa_suspend_zio_root, zio); | |
2014 | } | |
34dc7c2f | 2015 | |
b128c09f BB |
2016 | mutex_exit(&spa->spa_suspend_lock); |
2017 | } | |
34dc7c2f | 2018 | |
9babb374 | 2019 | int |
b128c09f BB |
2020 | zio_resume(spa_t *spa) |
2021 | { | |
9babb374 | 2022 | zio_t *pio; |
34dc7c2f BB |
2023 | |
2024 | /* | |
b128c09f | 2025 | * Reexecute all previously suspended i/o. |
34dc7c2f | 2026 | */ |
b128c09f BB |
2027 | mutex_enter(&spa->spa_suspend_lock); |
2028 | spa->spa_suspended = B_FALSE; | |
2029 | cv_broadcast(&spa->spa_suspend_cv); | |
2030 | pio = spa->spa_suspend_zio_root; | |
2031 | spa->spa_suspend_zio_root = NULL; | |
2032 | mutex_exit(&spa->spa_suspend_lock); | |
2033 | ||
2034 | if (pio == NULL) | |
9babb374 | 2035 | return (0); |
34dc7c2f | 2036 | |
9babb374 BB |
2037 | zio_reexecute(pio); |
2038 | return (zio_wait(pio)); | |
b128c09f BB |
2039 | } |
2040 | ||
2041 | void | |
2042 | zio_resume_wait(spa_t *spa) | |
2043 | { | |
2044 | mutex_enter(&spa->spa_suspend_lock); | |
2045 | while (spa_suspended(spa)) | |
2046 | cv_wait(&spa->spa_suspend_cv, &spa->spa_suspend_lock); | |
2047 | mutex_exit(&spa->spa_suspend_lock); | |
34dc7c2f BB |
2048 | } |
2049 | ||
2050 | /* | |
2051 | * ========================================================================== | |
b128c09f BB |
2052 | * Gang blocks. |
2053 | * | |
2054 | * A gang block is a collection of small blocks that looks to the DMU | |
2055 | * like one large block. When zio_dva_allocate() cannot find a block | |
2056 | * of the requested size, due to either severe fragmentation or the pool | |
2057 | * being nearly full, it calls zio_write_gang_block() to construct the | |
2058 | * block from smaller fragments. | |
2059 | * | |
2060 | * A gang block consists of a gang header (zio_gbh_phys_t) and up to | |
2061 | * three (SPA_GBH_NBLKPTRS) gang members. The gang header is just like | |
2062 | * an indirect block: it's an array of block pointers. It consumes | |
2063 | * only one sector and hence is allocatable regardless of fragmentation. | |
2064 | * The gang header's bps point to its gang members, which hold the data. | |
2065 | * | |
2066 | * Gang blocks are self-checksumming, using the bp's <vdev, offset, txg> | |
2067 | * as the verifier to ensure uniqueness of the SHA256 checksum. | |
2068 | * Critically, the gang block bp's blk_cksum is the checksum of the data, | |
2069 | * not the gang header. This ensures that data block signatures (needed for | |
2070 | * deduplication) are independent of how the block is physically stored. | |
2071 | * | |
2072 | * Gang blocks can be nested: a gang member may itself be a gang block. | |
2073 | * Thus every gang block is a tree in which root and all interior nodes are | |
2074 | * gang headers, and the leaves are normal blocks that contain user data. | |
2075 | * The root of the gang tree is called the gang leader. | |
2076 | * | |
2077 | * To perform any operation (read, rewrite, free, claim) on a gang block, | |
2078 | * zio_gang_assemble() first assembles the gang tree (minus data leaves) | |
2079 | * in the io_gang_tree field of the original logical i/o by recursively | |
2080 | * reading the gang leader and all gang headers below it. This yields | |
2081 | * an in-core tree containing the contents of every gang header and the | |
2082 | * bps for every constituent of the gang block. | |
2083 | * | |
2084 | * With the gang tree now assembled, zio_gang_issue() just walks the gang tree | |
2085 | * and invokes a callback on each bp. To free a gang block, zio_gang_issue() | |
2086 | * calls zio_free_gang() -- a trivial wrapper around zio_free() -- for each bp. | |
2087 | * zio_claim_gang() provides a similarly trivial wrapper for zio_claim(). | |
2088 | * zio_read_gang() is a wrapper around zio_read() that omits reading gang | |
2089 | * headers, since we already have those in io_gang_tree. zio_rewrite_gang() | |
2090 | * performs a zio_rewrite() of the data or, for gang headers, a zio_rewrite() | |
2091 | * of the gang header plus zio_checksum_compute() of the data to update the | |
2092 | * gang header's blk_cksum as described above. | |
2093 | * | |
2094 | * The two-phase assemble/issue model solves the problem of partial failure -- | |
2095 | * what if you'd freed part of a gang block but then couldn't read the | |
2096 | * gang header for another part? Assembling the entire gang tree first | |
2097 | * ensures that all the necessary gang header I/O has succeeded before | |
2098 | * starting the actual work of free, claim, or write. Once the gang tree | |
2099 | * is assembled, free and claim are in-memory operations that cannot fail. | |
2100 | * | |
2101 | * In the event that a gang write fails, zio_dva_unallocate() walks the | |
2102 | * gang tree to immediately free (i.e. insert back into the space map) | |
2103 | * everything we've allocated. This ensures that we don't get ENOSPC | |
2104 | * errors during repeated suspend/resume cycles due to a flaky device. | |
2105 | * | |
2106 | * Gang rewrites only happen during sync-to-convergence. If we can't assemble | |
2107 | * the gang tree, we won't modify the block, so we can safely defer the free | |
2108 | * (knowing that the block is still intact). If we *can* assemble the gang | |
2109 | * tree, then even if some of the rewrites fail, zio_dva_unallocate() will free | |
2110 | * each constituent bp and we can allocate a new block on the next sync pass. | |
2111 | * | |
2112 | * In all cases, the gang tree allows complete recovery from partial failure. | |
34dc7c2f BB |
2113 | * ========================================================================== |
2114 | */ | |
b128c09f | 2115 | |
a6255b7f DQ |
2116 | static void |
2117 | zio_gang_issue_func_done(zio_t *zio) | |
2118 | { | |
2119 | abd_put(zio->io_abd); | |
2120 | } | |
2121 | ||
b128c09f | 2122 | static zio_t * |
a6255b7f DQ |
2123 | zio_read_gang(zio_t *pio, blkptr_t *bp, zio_gang_node_t *gn, abd_t *data, |
2124 | uint64_t offset) | |
34dc7c2f | 2125 | { |
b128c09f BB |
2126 | if (gn != NULL) |
2127 | return (pio); | |
34dc7c2f | 2128 | |
a6255b7f DQ |
2129 | return (zio_read(pio, pio->io_spa, bp, abd_get_offset(data, offset), |
2130 | BP_GET_PSIZE(bp), zio_gang_issue_func_done, | |
2131 | NULL, pio->io_priority, ZIO_GANG_CHILD_FLAGS(pio), | |
b128c09f BB |
2132 | &pio->io_bookmark)); |
2133 | } | |
2134 | ||
a6255b7f DQ |
2135 | static zio_t * |
2136 | zio_rewrite_gang(zio_t *pio, blkptr_t *bp, zio_gang_node_t *gn, abd_t *data, | |
2137 | uint64_t offset) | |
b128c09f BB |
2138 | { |
2139 | zio_t *zio; | |
2140 | ||
2141 | if (gn != NULL) { | |
a6255b7f DQ |
2142 | abd_t *gbh_abd = |
2143 | abd_get_from_buf(gn->gn_gbh, SPA_GANGBLOCKSIZE); | |
b128c09f | 2144 | zio = zio_rewrite(pio, pio->io_spa, pio->io_txg, bp, |
a6255b7f DQ |
2145 | gbh_abd, SPA_GANGBLOCKSIZE, zio_gang_issue_func_done, NULL, |
2146 | pio->io_priority, ZIO_GANG_CHILD_FLAGS(pio), | |
2147 | &pio->io_bookmark); | |
34dc7c2f | 2148 | /* |
b128c09f BB |
2149 | * As we rewrite each gang header, the pipeline will compute |
2150 | * a new gang block header checksum for it; but no one will | |
2151 | * compute a new data checksum, so we do that here. The one | |
2152 | * exception is the gang leader: the pipeline already computed | |
2153 | * its data checksum because that stage precedes gang assembly. | |
2154 | * (Presently, nothing actually uses interior data checksums; | |
2155 | * this is just good hygiene.) | |
34dc7c2f | 2156 | */ |
9babb374 | 2157 | if (gn != pio->io_gang_leader->io_gang_tree) { |
a6255b7f DQ |
2158 | abd_t *buf = abd_get_offset(data, offset); |
2159 | ||
b128c09f | 2160 | zio_checksum_compute(zio, BP_GET_CHECKSUM(bp), |
a6255b7f DQ |
2161 | buf, BP_GET_PSIZE(bp)); |
2162 | ||
2163 | abd_put(buf); | |
b128c09f | 2164 | } |
428870ff BB |
2165 | /* |
2166 | * If we are here to damage data for testing purposes, | |
2167 | * leave the GBH alone so that we can detect the damage. | |
2168 | */ | |
2169 | if (pio->io_gang_leader->io_flags & ZIO_FLAG_INDUCE_DAMAGE) | |
2170 | zio->io_pipeline &= ~ZIO_VDEV_IO_STAGES; | |
34dc7c2f | 2171 | } else { |
b128c09f | 2172 | zio = zio_rewrite(pio, pio->io_spa, pio->io_txg, bp, |
a6255b7f DQ |
2173 | abd_get_offset(data, offset), BP_GET_PSIZE(bp), |
2174 | zio_gang_issue_func_done, NULL, pio->io_priority, | |
b128c09f | 2175 | ZIO_GANG_CHILD_FLAGS(pio), &pio->io_bookmark); |
34dc7c2f BB |
2176 | } |
2177 | ||
b128c09f BB |
2178 | return (zio); |
2179 | } | |
34dc7c2f | 2180 | |
b128c09f | 2181 | /* ARGSUSED */ |
a6255b7f DQ |
2182 | static zio_t * |
2183 | zio_free_gang(zio_t *pio, blkptr_t *bp, zio_gang_node_t *gn, abd_t *data, | |
2184 | uint64_t offset) | |
b128c09f | 2185 | { |
428870ff BB |
2186 | return (zio_free_sync(pio, pio->io_spa, pio->io_txg, bp, |
2187 | ZIO_GANG_CHILD_FLAGS(pio))); | |
34dc7c2f BB |
2188 | } |
2189 | ||
b128c09f | 2190 | /* ARGSUSED */ |
a6255b7f DQ |
2191 | static zio_t * |
2192 | zio_claim_gang(zio_t *pio, blkptr_t *bp, zio_gang_node_t *gn, abd_t *data, | |
2193 | uint64_t offset) | |
34dc7c2f | 2194 | { |
b128c09f BB |
2195 | return (zio_claim(pio, pio->io_spa, pio->io_txg, bp, |
2196 | NULL, NULL, ZIO_GANG_CHILD_FLAGS(pio))); | |
2197 | } | |
2198 | ||
2199 | static zio_gang_issue_func_t *zio_gang_issue_func[ZIO_TYPES] = { | |
2200 | NULL, | |
2201 | zio_read_gang, | |
2202 | zio_rewrite_gang, | |
2203 | zio_free_gang, | |
2204 | zio_claim_gang, | |
2205 | NULL | |
2206 | }; | |
34dc7c2f | 2207 | |
b128c09f | 2208 | static void zio_gang_tree_assemble_done(zio_t *zio); |
34dc7c2f | 2209 | |
b128c09f BB |
2210 | static zio_gang_node_t * |
2211 | zio_gang_node_alloc(zio_gang_node_t **gnpp) | |
2212 | { | |
2213 | zio_gang_node_t *gn; | |
34dc7c2f | 2214 | |
b128c09f | 2215 | ASSERT(*gnpp == NULL); |
34dc7c2f | 2216 | |
79c76d5b | 2217 | gn = kmem_zalloc(sizeof (*gn), KM_SLEEP); |
b128c09f BB |
2218 | gn->gn_gbh = zio_buf_alloc(SPA_GANGBLOCKSIZE); |
2219 | *gnpp = gn; | |
34dc7c2f | 2220 | |
b128c09f | 2221 | return (gn); |
34dc7c2f BB |
2222 | } |
2223 | ||
34dc7c2f | 2224 | static void |
b128c09f | 2225 | zio_gang_node_free(zio_gang_node_t **gnpp) |
34dc7c2f | 2226 | { |
b128c09f | 2227 | zio_gang_node_t *gn = *gnpp; |
34dc7c2f | 2228 | |
1c27024e | 2229 | for (int g = 0; g < SPA_GBH_NBLKPTRS; g++) |
b128c09f BB |
2230 | ASSERT(gn->gn_child[g] == NULL); |
2231 | ||
2232 | zio_buf_free(gn->gn_gbh, SPA_GANGBLOCKSIZE); | |
2233 | kmem_free(gn, sizeof (*gn)); | |
2234 | *gnpp = NULL; | |
34dc7c2f BB |
2235 | } |
2236 | ||
b128c09f BB |
2237 | static void |
2238 | zio_gang_tree_free(zio_gang_node_t **gnpp) | |
34dc7c2f | 2239 | { |
b128c09f | 2240 | zio_gang_node_t *gn = *gnpp; |
34dc7c2f | 2241 | |
b128c09f BB |
2242 | if (gn == NULL) |
2243 | return; | |
34dc7c2f | 2244 | |
1c27024e | 2245 | for (int g = 0; g < SPA_GBH_NBLKPTRS; g++) |
b128c09f | 2246 | zio_gang_tree_free(&gn->gn_child[g]); |
34dc7c2f | 2247 | |
b128c09f | 2248 | zio_gang_node_free(gnpp); |
34dc7c2f BB |
2249 | } |
2250 | ||
b128c09f | 2251 | static void |
9babb374 | 2252 | zio_gang_tree_assemble(zio_t *gio, blkptr_t *bp, zio_gang_node_t **gnpp) |
34dc7c2f | 2253 | { |
b128c09f | 2254 | zio_gang_node_t *gn = zio_gang_node_alloc(gnpp); |
a6255b7f | 2255 | abd_t *gbh_abd = abd_get_from_buf(gn->gn_gbh, SPA_GANGBLOCKSIZE); |
b128c09f | 2256 | |
9babb374 | 2257 | ASSERT(gio->io_gang_leader == gio); |
b128c09f | 2258 | ASSERT(BP_IS_GANG(bp)); |
34dc7c2f | 2259 | |
a6255b7f DQ |
2260 | zio_nowait(zio_read(gio, gio->io_spa, bp, gbh_abd, SPA_GANGBLOCKSIZE, |
2261 | zio_gang_tree_assemble_done, gn, gio->io_priority, | |
2262 | ZIO_GANG_CHILD_FLAGS(gio), &gio->io_bookmark)); | |
b128c09f | 2263 | } |
34dc7c2f | 2264 | |
b128c09f BB |
2265 | static void |
2266 | zio_gang_tree_assemble_done(zio_t *zio) | |
2267 | { | |
9babb374 | 2268 | zio_t *gio = zio->io_gang_leader; |
b128c09f BB |
2269 | zio_gang_node_t *gn = zio->io_private; |
2270 | blkptr_t *bp = zio->io_bp; | |
34dc7c2f | 2271 | |
9babb374 | 2272 | ASSERT(gio == zio_unique_parent(zio)); |
428870ff | 2273 | ASSERT(zio->io_child_count == 0); |
34dc7c2f | 2274 | |
b128c09f BB |
2275 | if (zio->io_error) |
2276 | return; | |
34dc7c2f | 2277 | |
a6255b7f | 2278 | /* this ABD was created from a linear buf in zio_gang_tree_assemble */ |
b128c09f | 2279 | if (BP_SHOULD_BYTESWAP(bp)) |
a6255b7f | 2280 | byteswap_uint64_array(abd_to_buf(zio->io_abd), zio->io_size); |
34dc7c2f | 2281 | |
a6255b7f | 2282 | ASSERT3P(abd_to_buf(zio->io_abd), ==, gn->gn_gbh); |
b128c09f | 2283 | ASSERT(zio->io_size == SPA_GANGBLOCKSIZE); |
428870ff | 2284 | ASSERT(gn->gn_gbh->zg_tail.zec_magic == ZEC_MAGIC); |
34dc7c2f | 2285 | |
a6255b7f DQ |
2286 | abd_put(zio->io_abd); |
2287 | ||
1c27024e | 2288 | for (int g = 0; g < SPA_GBH_NBLKPTRS; g++) { |
b128c09f BB |
2289 | blkptr_t *gbp = &gn->gn_gbh->zg_blkptr[g]; |
2290 | if (!BP_IS_GANG(gbp)) | |
2291 | continue; | |
9babb374 | 2292 | zio_gang_tree_assemble(gio, gbp, &gn->gn_child[g]); |
b128c09f | 2293 | } |
34dc7c2f BB |
2294 | } |
2295 | ||
b128c09f | 2296 | static void |
a6255b7f DQ |
2297 | zio_gang_tree_issue(zio_t *pio, zio_gang_node_t *gn, blkptr_t *bp, abd_t *data, |
2298 | uint64_t offset) | |
34dc7c2f | 2299 | { |
9babb374 | 2300 | zio_t *gio = pio->io_gang_leader; |
b128c09f | 2301 | zio_t *zio; |
34dc7c2f | 2302 | |
b128c09f | 2303 | ASSERT(BP_IS_GANG(bp) == !!gn); |
9babb374 BB |
2304 | ASSERT(BP_GET_CHECKSUM(bp) == BP_GET_CHECKSUM(gio->io_bp)); |
2305 | ASSERT(BP_GET_LSIZE(bp) == BP_GET_PSIZE(bp) || gn == gio->io_gang_tree); | |
34dc7c2f | 2306 | |
b128c09f BB |
2307 | /* |
2308 | * If you're a gang header, your data is in gn->gn_gbh. | |
2309 | * If you're a gang member, your data is in 'data' and gn == NULL. | |
2310 | */ | |
a6255b7f | 2311 | zio = zio_gang_issue_func[gio->io_type](pio, bp, gn, data, offset); |
34dc7c2f | 2312 | |
b128c09f | 2313 | if (gn != NULL) { |
428870ff | 2314 | ASSERT(gn->gn_gbh->zg_tail.zec_magic == ZEC_MAGIC); |
34dc7c2f | 2315 | |
1c27024e | 2316 | for (int g = 0; g < SPA_GBH_NBLKPTRS; g++) { |
b128c09f BB |
2317 | blkptr_t *gbp = &gn->gn_gbh->zg_blkptr[g]; |
2318 | if (BP_IS_HOLE(gbp)) | |
2319 | continue; | |
a6255b7f DQ |
2320 | zio_gang_tree_issue(zio, gn->gn_child[g], gbp, data, |
2321 | offset); | |
2322 | offset += BP_GET_PSIZE(gbp); | |
b128c09f | 2323 | } |
34dc7c2f BB |
2324 | } |
2325 | ||
9babb374 | 2326 | if (gn == gio->io_gang_tree) |
a6255b7f | 2327 | ASSERT3U(gio->io_size, ==, offset); |
34dc7c2f | 2328 | |
b128c09f BB |
2329 | if (zio != pio) |
2330 | zio_nowait(zio); | |
34dc7c2f BB |
2331 | } |
2332 | ||
2333 | static int | |
b128c09f | 2334 | zio_gang_assemble(zio_t *zio) |
34dc7c2f | 2335 | { |
b128c09f | 2336 | blkptr_t *bp = zio->io_bp; |
34dc7c2f | 2337 | |
9babb374 BB |
2338 | ASSERT(BP_IS_GANG(bp) && zio->io_gang_leader == NULL); |
2339 | ASSERT(zio->io_child_type > ZIO_CHILD_GANG); | |
2340 | ||
2341 | zio->io_gang_leader = zio; | |
34dc7c2f | 2342 | |
b128c09f | 2343 | zio_gang_tree_assemble(zio, bp, &zio->io_gang_tree); |
34dc7c2f BB |
2344 | |
2345 | return (ZIO_PIPELINE_CONTINUE); | |
2346 | } | |
2347 | ||
2348 | static int | |
b128c09f | 2349 | zio_gang_issue(zio_t *zio) |
34dc7c2f | 2350 | { |
b128c09f | 2351 | blkptr_t *bp = zio->io_bp; |
34dc7c2f | 2352 | |
b128c09f BB |
2353 | if (zio_wait_for_children(zio, ZIO_CHILD_GANG, ZIO_WAIT_DONE)) |
2354 | return (ZIO_PIPELINE_STOP); | |
34dc7c2f | 2355 | |
9babb374 BB |
2356 | ASSERT(BP_IS_GANG(bp) && zio->io_gang_leader == zio); |
2357 | ASSERT(zio->io_child_type > ZIO_CHILD_GANG); | |
34dc7c2f | 2358 | |
b128c09f | 2359 | if (zio->io_child_error[ZIO_CHILD_GANG] == 0) |
a6255b7f DQ |
2360 | zio_gang_tree_issue(zio, zio->io_gang_tree, bp, zio->io_abd, |
2361 | 0); | |
b128c09f | 2362 | else |
9babb374 | 2363 | zio_gang_tree_free(&zio->io_gang_tree); |
34dc7c2f | 2364 | |
b128c09f | 2365 | zio->io_pipeline = ZIO_INTERLOCK_PIPELINE; |
34dc7c2f BB |
2366 | |
2367 | return (ZIO_PIPELINE_CONTINUE); | |
2368 | } | |
2369 | ||
2370 | static void | |
b128c09f | 2371 | zio_write_gang_member_ready(zio_t *zio) |
34dc7c2f | 2372 | { |
d164b209 | 2373 | zio_t *pio = zio_unique_parent(zio); |
34dc7c2f BB |
2374 | dva_t *cdva = zio->io_bp->blk_dva; |
2375 | dva_t *pdva = pio->io_bp->blk_dva; | |
2376 | uint64_t asize; | |
d1d7e268 | 2377 | ASSERTV(zio_t *gio = zio->io_gang_leader); |
34dc7c2f | 2378 | |
b128c09f BB |
2379 | if (BP_IS_HOLE(zio->io_bp)) |
2380 | return; | |
2381 | ||
2382 | ASSERT(BP_IS_HOLE(&zio->io_bp_orig)); | |
2383 | ||
2384 | ASSERT(zio->io_child_type == ZIO_CHILD_GANG); | |
428870ff BB |
2385 | ASSERT3U(zio->io_prop.zp_copies, ==, gio->io_prop.zp_copies); |
2386 | ASSERT3U(zio->io_prop.zp_copies, <=, BP_GET_NDVAS(zio->io_bp)); | |
2387 | ASSERT3U(pio->io_prop.zp_copies, <=, BP_GET_NDVAS(pio->io_bp)); | |
34dc7c2f | 2388 | ASSERT3U(BP_GET_NDVAS(zio->io_bp), <=, BP_GET_NDVAS(pio->io_bp)); |
34dc7c2f BB |
2389 | |
2390 | mutex_enter(&pio->io_lock); | |
1c27024e | 2391 | for (int d = 0; d < BP_GET_NDVAS(zio->io_bp); d++) { |
34dc7c2f BB |
2392 | ASSERT(DVA_GET_GANG(&pdva[d])); |
2393 | asize = DVA_GET_ASIZE(&pdva[d]); | |
2394 | asize += DVA_GET_ASIZE(&cdva[d]); | |
2395 | DVA_SET_ASIZE(&pdva[d], asize); | |
2396 | } | |
2397 | mutex_exit(&pio->io_lock); | |
2398 | } | |
2399 | ||
a6255b7f DQ |
2400 | static void |
2401 | zio_write_gang_done(zio_t *zio) | |
2402 | { | |
2403 | abd_put(zio->io_abd); | |
2404 | } | |
2405 | ||
34dc7c2f | 2406 | static int |
b128c09f | 2407 | zio_write_gang_block(zio_t *pio) |
34dc7c2f | 2408 | { |
b128c09f | 2409 | spa_t *spa = pio->io_spa; |
3dfb57a3 | 2410 | metaslab_class_t *mc = spa_normal_class(spa); |
b128c09f | 2411 | blkptr_t *bp = pio->io_bp; |
9babb374 | 2412 | zio_t *gio = pio->io_gang_leader; |
b128c09f BB |
2413 | zio_t *zio; |
2414 | zio_gang_node_t *gn, **gnpp; | |
34dc7c2f | 2415 | zio_gbh_phys_t *gbh; |
a6255b7f | 2416 | abd_t *gbh_abd; |
b128c09f BB |
2417 | uint64_t txg = pio->io_txg; |
2418 | uint64_t resid = pio->io_size; | |
2419 | uint64_t lsize; | |
428870ff | 2420 | int copies = gio->io_prop.zp_copies; |
b5256303 | 2421 | int gbh_copies; |
b128c09f | 2422 | zio_prop_t zp; |
1c27024e | 2423 | int error; |
b5256303 TC |
2424 | |
2425 | /* | |
2426 | * encrypted blocks need DVA[2] free so encrypted gang headers can't | |
2427 | * have a third copy. | |
2428 | */ | |
2429 | gbh_copies = MIN(copies + 1, spa_max_replication(spa)); | |
2430 | if (gio->io_prop.zp_encrypt && gbh_copies >= SPA_DVAS_PER_BP) | |
2431 | gbh_copies = SPA_DVAS_PER_BP - 1; | |
2432 | ||
1c27024e | 2433 | int flags = METASLAB_HINTBP_FAVOR | METASLAB_GANG_HEADER; |
3dfb57a3 DB |
2434 | if (pio->io_flags & ZIO_FLAG_IO_ALLOCATING) { |
2435 | ASSERT(pio->io_priority == ZIO_PRIORITY_ASYNC_WRITE); | |
2436 | ASSERT(!(pio->io_flags & ZIO_FLAG_NODATA)); | |
2437 | ||
2438 | flags |= METASLAB_ASYNC_ALLOC; | |
2439 | VERIFY(refcount_held(&mc->mc_alloc_slots, pio)); | |
2440 | ||
2441 | /* | |
2442 | * The logical zio has already placed a reservation for | |
2443 | * 'copies' allocation slots but gang blocks may require | |
2444 | * additional copies. These additional copies | |
2445 | * (i.e. gbh_copies - copies) are guaranteed to succeed | |
2446 | * since metaslab_class_throttle_reserve() always allows | |
2447 | * additional reservations for gang blocks. | |
2448 | */ | |
2449 | VERIFY(metaslab_class_throttle_reserve(mc, gbh_copies - copies, | |
2450 | pio, flags)); | |
2451 | } | |
2452 | ||
2453 | error = metaslab_alloc(spa, mc, SPA_GANGBLOCKSIZE, | |
4e21fd06 DB |
2454 | bp, gbh_copies, txg, pio == gio ? NULL : gio->io_bp, flags, |
2455 | &pio->io_alloc_list, pio); | |
34dc7c2f | 2456 | if (error) { |
3dfb57a3 DB |
2457 | if (pio->io_flags & ZIO_FLAG_IO_ALLOCATING) { |
2458 | ASSERT(pio->io_priority == ZIO_PRIORITY_ASYNC_WRITE); | |
2459 | ASSERT(!(pio->io_flags & ZIO_FLAG_NODATA)); | |
2460 | ||
2461 | /* | |
2462 | * If we failed to allocate the gang block header then | |
2463 | * we remove any additional allocation reservations that | |
2464 | * we placed here. The original reservation will | |
2465 | * be removed when the logical I/O goes to the ready | |
2466 | * stage. | |
2467 | */ | |
2468 | metaslab_class_throttle_unreserve(mc, | |
2469 | gbh_copies - copies, pio); | |
2470 | } | |
2471 | ||
b128c09f | 2472 | pio->io_error = error; |
34dc7c2f BB |
2473 | return (ZIO_PIPELINE_CONTINUE); |
2474 | } | |
2475 | ||
9babb374 BB |
2476 | if (pio == gio) { |
2477 | gnpp = &gio->io_gang_tree; | |
b128c09f BB |
2478 | } else { |
2479 | gnpp = pio->io_private; | |
2480 | ASSERT(pio->io_ready == zio_write_gang_member_ready); | |
34dc7c2f BB |
2481 | } |
2482 | ||
b128c09f BB |
2483 | gn = zio_gang_node_alloc(gnpp); |
2484 | gbh = gn->gn_gbh; | |
2485 | bzero(gbh, SPA_GANGBLOCKSIZE); | |
a6255b7f | 2486 | gbh_abd = abd_get_from_buf(gbh, SPA_GANGBLOCKSIZE); |
34dc7c2f | 2487 | |
b128c09f BB |
2488 | /* |
2489 | * Create the gang header. | |
2490 | */ | |
a6255b7f DQ |
2491 | zio = zio_rewrite(pio, spa, txg, bp, gbh_abd, SPA_GANGBLOCKSIZE, |
2492 | zio_write_gang_done, NULL, pio->io_priority, | |
2493 | ZIO_GANG_CHILD_FLAGS(pio), &pio->io_bookmark); | |
34dc7c2f | 2494 | |
b128c09f BB |
2495 | /* |
2496 | * Create and nowait the gang children. | |
2497 | */ | |
1c27024e | 2498 | for (int g = 0; resid != 0; resid -= lsize, g++) { |
b128c09f BB |
2499 | lsize = P2ROUNDUP(resid / (SPA_GBH_NBLKPTRS - g), |
2500 | SPA_MINBLOCKSIZE); | |
2501 | ASSERT(lsize >= SPA_MINBLOCKSIZE && lsize <= resid); | |
2502 | ||
9babb374 | 2503 | zp.zp_checksum = gio->io_prop.zp_checksum; |
b128c09f BB |
2504 | zp.zp_compress = ZIO_COMPRESS_OFF; |
2505 | zp.zp_type = DMU_OT_NONE; | |
2506 | zp.zp_level = 0; | |
428870ff | 2507 | zp.zp_copies = gio->io_prop.zp_copies; |
03c6040b GW |
2508 | zp.zp_dedup = B_FALSE; |
2509 | zp.zp_dedup_verify = B_FALSE; | |
2510 | zp.zp_nopwrite = B_FALSE; | |
4807c0ba TC |
2511 | zp.zp_encrypt = gio->io_prop.zp_encrypt; |
2512 | zp.zp_byteorder = gio->io_prop.zp_byteorder; | |
b5256303 TC |
2513 | bzero(zp.zp_salt, ZIO_DATA_SALT_LEN); |
2514 | bzero(zp.zp_iv, ZIO_DATA_IV_LEN); | |
2515 | bzero(zp.zp_mac, ZIO_DATA_MAC_LEN); | |
b128c09f | 2516 | |
1c27024e | 2517 | zio_t *cio = zio_write(zio, spa, txg, &gbh->zg_blkptr[g], |
a6255b7f DQ |
2518 | abd_get_offset(pio->io_abd, pio->io_size - resid), lsize, |
2519 | lsize, &zp, zio_write_gang_member_ready, NULL, NULL, | |
2520 | zio_write_gang_done, &gn->gn_child[g], pio->io_priority, | |
3dfb57a3 DB |
2521 | ZIO_GANG_CHILD_FLAGS(pio), &pio->io_bookmark); |
2522 | ||
2523 | if (pio->io_flags & ZIO_FLAG_IO_ALLOCATING) { | |
2524 | ASSERT(pio->io_priority == ZIO_PRIORITY_ASYNC_WRITE); | |
2525 | ASSERT(!(pio->io_flags & ZIO_FLAG_NODATA)); | |
2526 | ||
2527 | /* | |
2528 | * Gang children won't throttle but we should | |
2529 | * account for their work, so reserve an allocation | |
2530 | * slot for them here. | |
2531 | */ | |
2532 | VERIFY(metaslab_class_throttle_reserve(mc, | |
2533 | zp.zp_copies, cio, flags)); | |
2534 | } | |
2535 | zio_nowait(cio); | |
b128c09f | 2536 | } |
34dc7c2f BB |
2537 | |
2538 | /* | |
b128c09f | 2539 | * Set pio's pipeline to just wait for zio to finish. |
34dc7c2f | 2540 | */ |
b128c09f BB |
2541 | pio->io_pipeline = ZIO_INTERLOCK_PIPELINE; |
2542 | ||
920dd524 ED |
2543 | /* |
2544 | * We didn't allocate this bp, so make sure it doesn't get unmarked. | |
2545 | */ | |
2546 | pio->io_flags &= ~ZIO_FLAG_FASTWRITE; | |
2547 | ||
b128c09f BB |
2548 | zio_nowait(zio); |
2549 | ||
2550 | return (ZIO_PIPELINE_CONTINUE); | |
34dc7c2f BB |
2551 | } |
2552 | ||
03c6040b | 2553 | /* |
3c67d83a TH |
2554 | * The zio_nop_write stage in the pipeline determines if allocating a |
2555 | * new bp is necessary. The nopwrite feature can handle writes in | |
2556 | * either syncing or open context (i.e. zil writes) and as a result is | |
2557 | * mutually exclusive with dedup. | |
2558 | * | |
2559 | * By leveraging a cryptographically secure checksum, such as SHA256, we | |
2560 | * can compare the checksums of the new data and the old to determine if | |
2561 | * allocating a new block is required. Note that our requirements for | |
2562 | * cryptographic strength are fairly weak: there can't be any accidental | |
2563 | * hash collisions, but we don't need to be secure against intentional | |
2564 | * (malicious) collisions. To trigger a nopwrite, you have to be able | |
2565 | * to write the file to begin with, and triggering an incorrect (hash | |
2566 | * collision) nopwrite is no worse than simply writing to the file. | |
2567 | * That said, there are no known attacks against the checksum algorithms | |
2568 | * used for nopwrite, assuming that the salt and the checksums | |
2569 | * themselves remain secret. | |
03c6040b GW |
2570 | */ |
2571 | static int | |
2572 | zio_nop_write(zio_t *zio) | |
2573 | { | |
2574 | blkptr_t *bp = zio->io_bp; | |
2575 | blkptr_t *bp_orig = &zio->io_bp_orig; | |
2576 | zio_prop_t *zp = &zio->io_prop; | |
2577 | ||
2578 | ASSERT(BP_GET_LEVEL(bp) == 0); | |
2579 | ASSERT(!(zio->io_flags & ZIO_FLAG_IO_REWRITE)); | |
2580 | ASSERT(zp->zp_nopwrite); | |
2581 | ASSERT(!zp->zp_dedup); | |
2582 | ASSERT(zio->io_bp_override == NULL); | |
2583 | ASSERT(IO_IS_ALLOCATING(zio)); | |
2584 | ||
2585 | /* | |
2586 | * Check to see if the original bp and the new bp have matching | |
2587 | * characteristics (i.e. same checksum, compression algorithms, etc). | |
2588 | * If they don't then just continue with the pipeline which will | |
2589 | * allocate a new bp. | |
2590 | */ | |
2591 | if (BP_IS_HOLE(bp_orig) || | |
3c67d83a TH |
2592 | !(zio_checksum_table[BP_GET_CHECKSUM(bp)].ci_flags & |
2593 | ZCHECKSUM_FLAG_NOPWRITE) || | |
b5256303 | 2594 | BP_IS_ENCRYPTED(bp) || BP_IS_ENCRYPTED(bp_orig) || |
03c6040b GW |
2595 | BP_GET_CHECKSUM(bp) != BP_GET_CHECKSUM(bp_orig) || |
2596 | BP_GET_COMPRESS(bp) != BP_GET_COMPRESS(bp_orig) || | |
2597 | BP_GET_DEDUP(bp) != BP_GET_DEDUP(bp_orig) || | |
2598 | zp->zp_copies != BP_GET_NDVAS(bp_orig)) | |
2599 | return (ZIO_PIPELINE_CONTINUE); | |
2600 | ||
2601 | /* | |
2602 | * If the checksums match then reset the pipeline so that we | |
2603 | * avoid allocating a new bp and issuing any I/O. | |
2604 | */ | |
2605 | if (ZIO_CHECKSUM_EQUAL(bp->blk_cksum, bp_orig->blk_cksum)) { | |
3c67d83a TH |
2606 | ASSERT(zio_checksum_table[zp->zp_checksum].ci_flags & |
2607 | ZCHECKSUM_FLAG_NOPWRITE); | |
03c6040b GW |
2608 | ASSERT3U(BP_GET_PSIZE(bp), ==, BP_GET_PSIZE(bp_orig)); |
2609 | ASSERT3U(BP_GET_LSIZE(bp), ==, BP_GET_LSIZE(bp_orig)); | |
2610 | ASSERT(zp->zp_compress != ZIO_COMPRESS_OFF); | |
2611 | ASSERT(bcmp(&bp->blk_prop, &bp_orig->blk_prop, | |
2612 | sizeof (uint64_t)) == 0); | |
2613 | ||
2614 | *bp = *bp_orig; | |
2615 | zio->io_pipeline = ZIO_INTERLOCK_PIPELINE; | |
2616 | zio->io_flags |= ZIO_FLAG_NOPWRITE; | |
2617 | } | |
2618 | ||
2619 | return (ZIO_PIPELINE_CONTINUE); | |
2620 | } | |
2621 | ||
34dc7c2f BB |
2622 | /* |
2623 | * ========================================================================== | |
428870ff | 2624 | * Dedup |
34dc7c2f BB |
2625 | * ========================================================================== |
2626 | */ | |
428870ff BB |
2627 | static void |
2628 | zio_ddt_child_read_done(zio_t *zio) | |
2629 | { | |
2630 | blkptr_t *bp = zio->io_bp; | |
2631 | ddt_entry_t *dde = zio->io_private; | |
2632 | ddt_phys_t *ddp; | |
2633 | zio_t *pio = zio_unique_parent(zio); | |
2634 | ||
2635 | mutex_enter(&pio->io_lock); | |
2636 | ddp = ddt_phys_select(dde, bp); | |
2637 | if (zio->io_error == 0) | |
2638 | ddt_phys_clear(ddp); /* this ddp doesn't need repair */ | |
a6255b7f DQ |
2639 | |
2640 | if (zio->io_error == 0 && dde->dde_repair_abd == NULL) | |
2641 | dde->dde_repair_abd = zio->io_abd; | |
428870ff | 2642 | else |
a6255b7f | 2643 | abd_free(zio->io_abd); |
428870ff BB |
2644 | mutex_exit(&pio->io_lock); |
2645 | } | |
2646 | ||
2647 | static int | |
2648 | zio_ddt_read_start(zio_t *zio) | |
2649 | { | |
2650 | blkptr_t *bp = zio->io_bp; | |
2651 | ||
2652 | ASSERT(BP_GET_DEDUP(bp)); | |
2653 | ASSERT(BP_GET_PSIZE(bp) == zio->io_size); | |
2654 | ASSERT(zio->io_child_type == ZIO_CHILD_LOGICAL); | |
2655 | ||
2656 | if (zio->io_child_error[ZIO_CHILD_DDT]) { | |
2657 | ddt_t *ddt = ddt_select(zio->io_spa, bp); | |
2658 | ddt_entry_t *dde = ddt_repair_start(ddt, bp); | |
2659 | ddt_phys_t *ddp = dde->dde_phys; | |
2660 | ddt_phys_t *ddp_self = ddt_phys_select(dde, bp); | |
2661 | blkptr_t blk; | |
2662 | ||
2663 | ASSERT(zio->io_vsd == NULL); | |
2664 | zio->io_vsd = dde; | |
2665 | ||
2666 | if (ddp_self == NULL) | |
2667 | return (ZIO_PIPELINE_CONTINUE); | |
2668 | ||
1c27024e | 2669 | for (int p = 0; p < DDT_PHYS_TYPES; p++, ddp++) { |
428870ff BB |
2670 | if (ddp->ddp_phys_birth == 0 || ddp == ddp_self) |
2671 | continue; | |
2672 | ddt_bp_create(ddt->ddt_checksum, &dde->dde_key, ddp, | |
2673 | &blk); | |
2674 | zio_nowait(zio_read(zio, zio->io_spa, &blk, | |
a6255b7f DQ |
2675 | abd_alloc_for_io(zio->io_size, B_TRUE), |
2676 | zio->io_size, zio_ddt_child_read_done, dde, | |
2677 | zio->io_priority, ZIO_DDT_CHILD_FLAGS(zio) | | |
2678 | ZIO_FLAG_DONT_PROPAGATE, &zio->io_bookmark)); | |
428870ff BB |
2679 | } |
2680 | return (ZIO_PIPELINE_CONTINUE); | |
2681 | } | |
2682 | ||
2683 | zio_nowait(zio_read(zio, zio->io_spa, bp, | |
a6255b7f | 2684 | zio->io_abd, zio->io_size, NULL, NULL, zio->io_priority, |
428870ff BB |
2685 | ZIO_DDT_CHILD_FLAGS(zio), &zio->io_bookmark)); |
2686 | ||
2687 | return (ZIO_PIPELINE_CONTINUE); | |
2688 | } | |
2689 | ||
2690 | static int | |
2691 | zio_ddt_read_done(zio_t *zio) | |
2692 | { | |
2693 | blkptr_t *bp = zio->io_bp; | |
2694 | ||
2695 | if (zio_wait_for_children(zio, ZIO_CHILD_DDT, ZIO_WAIT_DONE)) | |
2696 | return (ZIO_PIPELINE_STOP); | |
2697 | ||
2698 | ASSERT(BP_GET_DEDUP(bp)); | |
2699 | ASSERT(BP_GET_PSIZE(bp) == zio->io_size); | |
2700 | ASSERT(zio->io_child_type == ZIO_CHILD_LOGICAL); | |
2701 | ||
2702 | if (zio->io_child_error[ZIO_CHILD_DDT]) { | |
2703 | ddt_t *ddt = ddt_select(zio->io_spa, bp); | |
2704 | ddt_entry_t *dde = zio->io_vsd; | |
2705 | if (ddt == NULL) { | |
2706 | ASSERT(spa_load_state(zio->io_spa) != SPA_LOAD_NONE); | |
2707 | return (ZIO_PIPELINE_CONTINUE); | |
2708 | } | |
2709 | if (dde == NULL) { | |
2710 | zio->io_stage = ZIO_STAGE_DDT_READ_START >> 1; | |
2711 | zio_taskq_dispatch(zio, ZIO_TASKQ_ISSUE, B_FALSE); | |
2712 | return (ZIO_PIPELINE_STOP); | |
2713 | } | |
a6255b7f DQ |
2714 | if (dde->dde_repair_abd != NULL) { |
2715 | abd_copy(zio->io_abd, dde->dde_repair_abd, | |
2716 | zio->io_size); | |
428870ff BB |
2717 | zio->io_child_error[ZIO_CHILD_DDT] = 0; |
2718 | } | |
2719 | ddt_repair_done(ddt, dde); | |
2720 | zio->io_vsd = NULL; | |
2721 | } | |
2722 | ||
2723 | ASSERT(zio->io_vsd == NULL); | |
2724 | ||
2725 | return (ZIO_PIPELINE_CONTINUE); | |
2726 | } | |
2727 | ||
2728 | static boolean_t | |
2729 | zio_ddt_collision(zio_t *zio, ddt_t *ddt, ddt_entry_t *dde) | |
2730 | { | |
2731 | spa_t *spa = zio->io_spa; | |
c17bcf83 | 2732 | boolean_t do_raw = !!(zio->io_flags & ZIO_FLAG_RAW); |
428870ff | 2733 | |
c17bcf83 | 2734 | ASSERT(!(zio->io_bp_override && do_raw)); |
2aa34383 | 2735 | |
428870ff BB |
2736 | /* |
2737 | * Note: we compare the original data, not the transformed data, | |
2738 | * because when zio->io_bp is an override bp, we will not have | |
2739 | * pushed the I/O transforms. That's an important optimization | |
2740 | * because otherwise we'd compress/encrypt all dmu_sync() data twice. | |
c17bcf83 | 2741 | * However, we should never get a raw, override zio so in these |
b5256303 | 2742 | * cases we can compare the io_abd directly. This is useful because |
c17bcf83 TC |
2743 | * it allows us to do dedup verification even if we don't have access |
2744 | * to the original data (for instance, if the encryption keys aren't | |
2745 | * loaded). | |
428870ff | 2746 | */ |
c17bcf83 | 2747 | |
1c27024e | 2748 | for (int p = DDT_PHYS_SINGLE; p <= DDT_PHYS_TRIPLE; p++) { |
428870ff BB |
2749 | zio_t *lio = dde->dde_lead_zio[p]; |
2750 | ||
c17bcf83 TC |
2751 | if (lio != NULL && do_raw) { |
2752 | return (lio->io_size != zio->io_size || | |
a6255b7f | 2753 | abd_cmp(zio->io_abd, lio->io_abd) != 0); |
c17bcf83 | 2754 | } else if (lio != NULL) { |
428870ff | 2755 | return (lio->io_orig_size != zio->io_orig_size || |
a6255b7f | 2756 | abd_cmp(zio->io_orig_abd, lio->io_orig_abd) != 0); |
428870ff BB |
2757 | } |
2758 | } | |
2759 | ||
1c27024e | 2760 | for (int p = DDT_PHYS_SINGLE; p <= DDT_PHYS_TRIPLE; p++) { |
428870ff BB |
2761 | ddt_phys_t *ddp = &dde->dde_phys[p]; |
2762 | ||
c17bcf83 TC |
2763 | if (ddp->ddp_phys_birth != 0 && do_raw) { |
2764 | blkptr_t blk = *zio->io_bp; | |
2765 | uint64_t psize; | |
a6255b7f | 2766 | abd_t *tmpabd; |
c17bcf83 TC |
2767 | int error; |
2768 | ||
2769 | ddt_bp_fill(ddp, &blk, ddp->ddp_phys_birth); | |
2770 | psize = BP_GET_PSIZE(&blk); | |
2771 | ||
2772 | if (psize != zio->io_size) | |
2773 | return (B_TRUE); | |
2774 | ||
2775 | ddt_exit(ddt); | |
2776 | ||
a6255b7f | 2777 | tmpabd = abd_alloc_for_io(psize, B_TRUE); |
c17bcf83 | 2778 | |
a6255b7f | 2779 | error = zio_wait(zio_read(NULL, spa, &blk, tmpabd, |
c17bcf83 TC |
2780 | psize, NULL, NULL, ZIO_PRIORITY_SYNC_READ, |
2781 | ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE | | |
2782 | ZIO_FLAG_RAW, &zio->io_bookmark)); | |
2783 | ||
2784 | if (error == 0) { | |
a6255b7f | 2785 | if (abd_cmp(tmpabd, zio->io_abd) != 0) |
c17bcf83 TC |
2786 | error = SET_ERROR(ENOENT); |
2787 | } | |
2788 | ||
a6255b7f | 2789 | abd_free(tmpabd); |
c17bcf83 TC |
2790 | ddt_enter(ddt); |
2791 | return (error != 0); | |
2792 | } else if (ddp->ddp_phys_birth != 0) { | |
428870ff | 2793 | arc_buf_t *abuf = NULL; |
2a432414 | 2794 | arc_flags_t aflags = ARC_FLAG_WAIT; |
428870ff BB |
2795 | blkptr_t blk = *zio->io_bp; |
2796 | int error; | |
2797 | ||
2798 | ddt_bp_fill(ddp, &blk, ddp->ddp_phys_birth); | |
2799 | ||
c17bcf83 TC |
2800 | if (BP_GET_LSIZE(&blk) != zio->io_orig_size) |
2801 | return (B_TRUE); | |
2802 | ||
428870ff BB |
2803 | ddt_exit(ddt); |
2804 | ||
294f6806 | 2805 | error = arc_read(NULL, spa, &blk, |
428870ff BB |
2806 | arc_getbuf_func, &abuf, ZIO_PRIORITY_SYNC_READ, |
2807 | ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE, | |
2808 | &aflags, &zio->io_bookmark); | |
2809 | ||
2810 | if (error == 0) { | |
a6255b7f | 2811 | if (abd_cmp_buf(zio->io_orig_abd, abuf->b_data, |
428870ff | 2812 | zio->io_orig_size) != 0) |
c17bcf83 | 2813 | error = SET_ERROR(ENOENT); |
d3c2ae1c | 2814 | arc_buf_destroy(abuf, &abuf); |
428870ff BB |
2815 | } |
2816 | ||
2817 | ddt_enter(ddt); | |
2818 | return (error != 0); | |
2819 | } | |
2820 | } | |
2821 | ||
2822 | return (B_FALSE); | |
2823 | } | |
2824 | ||
2825 | static void | |
2826 | zio_ddt_child_write_ready(zio_t *zio) | |
2827 | { | |
2828 | int p = zio->io_prop.zp_copies; | |
2829 | ddt_t *ddt = ddt_select(zio->io_spa, zio->io_bp); | |
2830 | ddt_entry_t *dde = zio->io_private; | |
2831 | ddt_phys_t *ddp = &dde->dde_phys[p]; | |
2832 | zio_t *pio; | |
2833 | ||
2834 | if (zio->io_error) | |
2835 | return; | |
2836 | ||
2837 | ddt_enter(ddt); | |
2838 | ||
2839 | ASSERT(dde->dde_lead_zio[p] == zio); | |
2840 | ||
2841 | ddt_phys_fill(ddp, zio->io_bp); | |
2842 | ||
1c27024e | 2843 | zio_link_t *zl = NULL; |
3dfb57a3 | 2844 | while ((pio = zio_walk_parents(zio, &zl)) != NULL) |
428870ff BB |
2845 | ddt_bp_fill(ddp, pio->io_bp, zio->io_txg); |
2846 | ||
2847 | ddt_exit(ddt); | |
2848 | } | |
2849 | ||
2850 | static void | |
2851 | zio_ddt_child_write_done(zio_t *zio) | |
2852 | { | |
2853 | int p = zio->io_prop.zp_copies; | |
2854 | ddt_t *ddt = ddt_select(zio->io_spa, zio->io_bp); | |
2855 | ddt_entry_t *dde = zio->io_private; | |
2856 | ddt_phys_t *ddp = &dde->dde_phys[p]; | |
2857 | ||
2858 | ddt_enter(ddt); | |
2859 | ||
2860 | ASSERT(ddp->ddp_refcnt == 0); | |
2861 | ASSERT(dde->dde_lead_zio[p] == zio); | |
2862 | dde->dde_lead_zio[p] = NULL; | |
2863 | ||
2864 | if (zio->io_error == 0) { | |
3dfb57a3 DB |
2865 | zio_link_t *zl = NULL; |
2866 | while (zio_walk_parents(zio, &zl) != NULL) | |
428870ff BB |
2867 | ddt_phys_addref(ddp); |
2868 | } else { | |
2869 | ddt_phys_clear(ddp); | |
2870 | } | |
2871 | ||
2872 | ddt_exit(ddt); | |
2873 | } | |
2874 | ||
2875 | static void | |
2876 | zio_ddt_ditto_write_done(zio_t *zio) | |
2877 | { | |
2878 | int p = DDT_PHYS_DITTO; | |
1c27024e | 2879 | ASSERTV(zio_prop_t *zp = &zio->io_prop); |
428870ff BB |
2880 | blkptr_t *bp = zio->io_bp; |
2881 | ddt_t *ddt = ddt_select(zio->io_spa, bp); | |
2882 | ddt_entry_t *dde = zio->io_private; | |
2883 | ddt_phys_t *ddp = &dde->dde_phys[p]; | |
2884 | ddt_key_t *ddk = &dde->dde_key; | |
2885 | ||
2886 | ddt_enter(ddt); | |
2887 | ||
2888 | ASSERT(ddp->ddp_refcnt == 0); | |
2889 | ASSERT(dde->dde_lead_zio[p] == zio); | |
2890 | dde->dde_lead_zio[p] = NULL; | |
2891 | ||
2892 | if (zio->io_error == 0) { | |
2893 | ASSERT(ZIO_CHECKSUM_EQUAL(bp->blk_cksum, ddk->ddk_cksum)); | |
2894 | ASSERT(zp->zp_copies < SPA_DVAS_PER_BP); | |
2895 | ASSERT(zp->zp_copies == BP_GET_NDVAS(bp) - BP_IS_GANG(bp)); | |
2896 | if (ddp->ddp_phys_birth != 0) | |
2897 | ddt_phys_free(ddt, ddk, ddp, zio->io_txg); | |
2898 | ddt_phys_fill(ddp, bp); | |
2899 | } | |
2900 | ||
2901 | ddt_exit(ddt); | |
2902 | } | |
2903 | ||
2904 | static int | |
2905 | zio_ddt_write(zio_t *zio) | |
2906 | { | |
2907 | spa_t *spa = zio->io_spa; | |
2908 | blkptr_t *bp = zio->io_bp; | |
2909 | uint64_t txg = zio->io_txg; | |
2910 | zio_prop_t *zp = &zio->io_prop; | |
2911 | int p = zp->zp_copies; | |
2912 | int ditto_copies; | |
2913 | zio_t *cio = NULL; | |
2914 | zio_t *dio = NULL; | |
2915 | ddt_t *ddt = ddt_select(spa, bp); | |
2916 | ddt_entry_t *dde; | |
2917 | ddt_phys_t *ddp; | |
2918 | ||
2919 | ASSERT(BP_GET_DEDUP(bp)); | |
2920 | ASSERT(BP_GET_CHECKSUM(bp) == zp->zp_checksum); | |
2921 | ASSERT(BP_IS_HOLE(bp) || zio->io_bp_override); | |
c17bcf83 | 2922 | ASSERT(!(zio->io_bp_override && (zio->io_flags & ZIO_FLAG_RAW))); |
428870ff BB |
2923 | |
2924 | ddt_enter(ddt); | |
2925 | dde = ddt_lookup(ddt, bp, B_TRUE); | |
2926 | ddp = &dde->dde_phys[p]; | |
2927 | ||
2928 | if (zp->zp_dedup_verify && zio_ddt_collision(zio, ddt, dde)) { | |
2929 | /* | |
2930 | * If we're using a weak checksum, upgrade to a strong checksum | |
2931 | * and try again. If we're already using a strong checksum, | |
2932 | * we can't resolve it, so just convert to an ordinary write. | |
2933 | * (And automatically e-mail a paper to Nature?) | |
2934 | */ | |
3c67d83a TH |
2935 | if (!(zio_checksum_table[zp->zp_checksum].ci_flags & |
2936 | ZCHECKSUM_FLAG_DEDUP)) { | |
428870ff BB |
2937 | zp->zp_checksum = spa_dedup_checksum(spa); |
2938 | zio_pop_transforms(zio); | |
2939 | zio->io_stage = ZIO_STAGE_OPEN; | |
2940 | BP_ZERO(bp); | |
2941 | } else { | |
03c6040b | 2942 | zp->zp_dedup = B_FALSE; |
428870ff BB |
2943 | } |
2944 | zio->io_pipeline = ZIO_WRITE_PIPELINE; | |
2945 | ddt_exit(ddt); | |
2946 | return (ZIO_PIPELINE_CONTINUE); | |
2947 | } | |
2948 | ||
2949 | ditto_copies = ddt_ditto_copies_needed(ddt, dde, ddp); | |
2950 | ASSERT(ditto_copies < SPA_DVAS_PER_BP); | |
2951 | ||
2952 | if (ditto_copies > ddt_ditto_copies_present(dde) && | |
2953 | dde->dde_lead_zio[DDT_PHYS_DITTO] == NULL) { | |
2954 | zio_prop_t czp = *zp; | |
2955 | ||
2956 | czp.zp_copies = ditto_copies; | |
2957 | ||
2958 | /* | |
2959 | * If we arrived here with an override bp, we won't have run | |
2960 | * the transform stack, so we won't have the data we need to | |
2961 | * generate a child i/o. So, toss the override bp and restart. | |
2962 | * This is safe, because using the override bp is just an | |
2963 | * optimization; and it's rare, so the cost doesn't matter. | |
2964 | */ | |
2965 | if (zio->io_bp_override) { | |
2966 | zio_pop_transforms(zio); | |
2967 | zio->io_stage = ZIO_STAGE_OPEN; | |
2968 | zio->io_pipeline = ZIO_WRITE_PIPELINE; | |
2969 | zio->io_bp_override = NULL; | |
2970 | BP_ZERO(bp); | |
2971 | ddt_exit(ddt); | |
2972 | return (ZIO_PIPELINE_CONTINUE); | |
2973 | } | |
2974 | ||
a6255b7f | 2975 | dio = zio_write(zio, spa, txg, bp, zio->io_orig_abd, |
2aa34383 | 2976 | zio->io_orig_size, zio->io_orig_size, &czp, NULL, NULL, |
bc77ba73 | 2977 | NULL, zio_ddt_ditto_write_done, dde, zio->io_priority, |
428870ff BB |
2978 | ZIO_DDT_CHILD_FLAGS(zio), &zio->io_bookmark); |
2979 | ||
a6255b7f | 2980 | zio_push_transform(dio, zio->io_abd, zio->io_size, 0, NULL); |
428870ff BB |
2981 | dde->dde_lead_zio[DDT_PHYS_DITTO] = dio; |
2982 | } | |
2983 | ||
2984 | if (ddp->ddp_phys_birth != 0 || dde->dde_lead_zio[p] != NULL) { | |
2985 | if (ddp->ddp_phys_birth != 0) | |
2986 | ddt_bp_fill(ddp, bp, txg); | |
2987 | if (dde->dde_lead_zio[p] != NULL) | |
2988 | zio_add_child(zio, dde->dde_lead_zio[p]); | |
2989 | else | |
2990 | ddt_phys_addref(ddp); | |
2991 | } else if (zio->io_bp_override) { | |
2992 | ASSERT(bp->blk_birth == txg); | |
2993 | ASSERT(BP_EQUAL(bp, zio->io_bp_override)); | |
2994 | ddt_phys_fill(ddp, bp); | |
2995 | ddt_phys_addref(ddp); | |
2996 | } else { | |
a6255b7f | 2997 | cio = zio_write(zio, spa, txg, bp, zio->io_orig_abd, |
2aa34383 | 2998 | zio->io_orig_size, zio->io_orig_size, zp, |
bc77ba73 | 2999 | zio_ddt_child_write_ready, NULL, NULL, |
428870ff BB |
3000 | zio_ddt_child_write_done, dde, zio->io_priority, |
3001 | ZIO_DDT_CHILD_FLAGS(zio), &zio->io_bookmark); | |
3002 | ||
a6255b7f | 3003 | zio_push_transform(cio, zio->io_abd, zio->io_size, 0, NULL); |
428870ff BB |
3004 | dde->dde_lead_zio[p] = cio; |
3005 | } | |
3006 | ||
3007 | ddt_exit(ddt); | |
3008 | ||
3009 | if (cio) | |
3010 | zio_nowait(cio); | |
3011 | if (dio) | |
3012 | zio_nowait(dio); | |
3013 | ||
3014 | return (ZIO_PIPELINE_CONTINUE); | |
3015 | } | |
3016 | ||
3017 | ddt_entry_t *freedde; /* for debugging */ | |
b128c09f | 3018 | |
428870ff BB |
3019 | static int |
3020 | zio_ddt_free(zio_t *zio) | |
3021 | { | |
3022 | spa_t *spa = zio->io_spa; | |
3023 | blkptr_t *bp = zio->io_bp; | |
3024 | ddt_t *ddt = ddt_select(spa, bp); | |
3025 | ddt_entry_t *dde; | |
3026 | ddt_phys_t *ddp; | |
3027 | ||
3028 | ASSERT(BP_GET_DEDUP(bp)); | |
3029 | ASSERT(zio->io_child_type == ZIO_CHILD_LOGICAL); | |
3030 | ||
3031 | ddt_enter(ddt); | |
3032 | freedde = dde = ddt_lookup(ddt, bp, B_TRUE); | |
5dc6af0e BB |
3033 | if (dde) { |
3034 | ddp = ddt_phys_select(dde, bp); | |
3035 | if (ddp) | |
3036 | ddt_phys_decref(ddp); | |
3037 | } | |
428870ff BB |
3038 | ddt_exit(ddt); |
3039 | ||
3040 | return (ZIO_PIPELINE_CONTINUE); | |
3041 | } | |
3042 | ||
3043 | /* | |
3044 | * ========================================================================== | |
3045 | * Allocate and free blocks | |
3046 | * ========================================================================== | |
3047 | */ | |
3dfb57a3 DB |
3048 | |
3049 | static zio_t * | |
3050 | zio_io_to_allocate(spa_t *spa) | |
3051 | { | |
3052 | zio_t *zio; | |
3053 | ||
3054 | ASSERT(MUTEX_HELD(&spa->spa_alloc_lock)); | |
3055 | ||
3056 | zio = avl_first(&spa->spa_alloc_tree); | |
3057 | if (zio == NULL) | |
3058 | return (NULL); | |
3059 | ||
3060 | ASSERT(IO_IS_ALLOCATING(zio)); | |
3061 | ||
3062 | /* | |
3063 | * Try to place a reservation for this zio. If we're unable to | |
3064 | * reserve then we throttle. | |
3065 | */ | |
3066 | if (!metaslab_class_throttle_reserve(spa_normal_class(spa), | |
3067 | zio->io_prop.zp_copies, zio, 0)) { | |
3068 | return (NULL); | |
3069 | } | |
3070 | ||
3071 | avl_remove(&spa->spa_alloc_tree, zio); | |
3072 | ASSERT3U(zio->io_stage, <, ZIO_STAGE_DVA_ALLOCATE); | |
3073 | ||
3074 | return (zio); | |
3075 | } | |
3076 | ||
3077 | static int | |
3078 | zio_dva_throttle(zio_t *zio) | |
3079 | { | |
3080 | spa_t *spa = zio->io_spa; | |
3081 | zio_t *nio; | |
3082 | ||
3083 | if (zio->io_priority == ZIO_PRIORITY_SYNC_WRITE || | |
3084 | !spa_normal_class(zio->io_spa)->mc_alloc_throttle_enabled || | |
3085 | zio->io_child_type == ZIO_CHILD_GANG || | |
3086 | zio->io_flags & ZIO_FLAG_NODATA) { | |
3087 | return (ZIO_PIPELINE_CONTINUE); | |
3088 | } | |
3089 | ||
3090 | ASSERT(zio->io_child_type > ZIO_CHILD_GANG); | |
3091 | ||
3092 | ASSERT3U(zio->io_queued_timestamp, >, 0); | |
3093 | ASSERT(zio->io_stage == ZIO_STAGE_DVA_THROTTLE); | |
3094 | ||
3095 | mutex_enter(&spa->spa_alloc_lock); | |
3096 | ||
3097 | ASSERT(zio->io_type == ZIO_TYPE_WRITE); | |
3098 | avl_add(&spa->spa_alloc_tree, zio); | |
3099 | ||
3100 | nio = zio_io_to_allocate(zio->io_spa); | |
3101 | mutex_exit(&spa->spa_alloc_lock); | |
3102 | ||
3103 | if (nio == zio) | |
3104 | return (ZIO_PIPELINE_CONTINUE); | |
3105 | ||
3106 | if (nio != NULL) { | |
3dfb57a3 DB |
3107 | ASSERT(nio->io_stage == ZIO_STAGE_DVA_THROTTLE); |
3108 | /* | |
3109 | * We are passing control to a new zio so make sure that | |
3110 | * it is processed by a different thread. We do this to | |
3111 | * avoid stack overflows that can occur when parents are | |
3112 | * throttled and children are making progress. We allow | |
3113 | * it to go to the head of the taskq since it's already | |
3114 | * been waiting. | |
3115 | */ | |
3116 | zio_taskq_dispatch(nio, ZIO_TASKQ_ISSUE, B_TRUE); | |
3117 | } | |
3118 | return (ZIO_PIPELINE_STOP); | |
3119 | } | |
3120 | ||
3121 | void | |
3122 | zio_allocate_dispatch(spa_t *spa) | |
3123 | { | |
3124 | zio_t *zio; | |
3125 | ||
3126 | mutex_enter(&spa->spa_alloc_lock); | |
3127 | zio = zio_io_to_allocate(spa); | |
3128 | mutex_exit(&spa->spa_alloc_lock); | |
3129 | if (zio == NULL) | |
3130 | return; | |
3131 | ||
3132 | ASSERT3U(zio->io_stage, ==, ZIO_STAGE_DVA_THROTTLE); | |
3133 | ASSERT0(zio->io_error); | |
3134 | zio_taskq_dispatch(zio, ZIO_TASKQ_ISSUE, B_TRUE); | |
3135 | } | |
3136 | ||
34dc7c2f BB |
3137 | static int |
3138 | zio_dva_allocate(zio_t *zio) | |
3139 | { | |
3140 | spa_t *spa = zio->io_spa; | |
428870ff | 3141 | metaslab_class_t *mc = spa_normal_class(spa); |
34dc7c2f BB |
3142 | blkptr_t *bp = zio->io_bp; |
3143 | int error; | |
6d974228 | 3144 | int flags = 0; |
34dc7c2f | 3145 | |
9babb374 BB |
3146 | if (zio->io_gang_leader == NULL) { |
3147 | ASSERT(zio->io_child_type > ZIO_CHILD_GANG); | |
3148 | zio->io_gang_leader = zio; | |
3149 | } | |
3150 | ||
34dc7c2f | 3151 | ASSERT(BP_IS_HOLE(bp)); |
c99c9001 | 3152 | ASSERT0(BP_GET_NDVAS(bp)); |
428870ff BB |
3153 | ASSERT3U(zio->io_prop.zp_copies, >, 0); |
3154 | ASSERT3U(zio->io_prop.zp_copies, <=, spa_max_replication(spa)); | |
34dc7c2f BB |
3155 | ASSERT3U(zio->io_size, ==, BP_GET_PSIZE(bp)); |
3156 | ||
920dd524 | 3157 | flags |= (zio->io_flags & ZIO_FLAG_FASTWRITE) ? METASLAB_FASTWRITE : 0; |
3dfb57a3 DB |
3158 | if (zio->io_flags & ZIO_FLAG_NODATA) |
3159 | flags |= METASLAB_DONT_THROTTLE; | |
3160 | if (zio->io_flags & ZIO_FLAG_GANG_CHILD) | |
3161 | flags |= METASLAB_GANG_CHILD; | |
3162 | if (zio->io_priority == ZIO_PRIORITY_ASYNC_WRITE) | |
3163 | flags |= METASLAB_ASYNC_ALLOC; | |
3164 | ||
b128c09f | 3165 | error = metaslab_alloc(spa, mc, zio->io_size, bp, |
4e21fd06 DB |
3166 | zio->io_prop.zp_copies, zio->io_txg, NULL, flags, |
3167 | &zio->io_alloc_list, zio); | |
34dc7c2f | 3168 | |
3dfb57a3 | 3169 | if (error != 0) { |
6d974228 GW |
3170 | spa_dbgmsg(spa, "%s: metaslab allocation failure: zio %p, " |
3171 | "size %llu, error %d", spa_name(spa), zio, zio->io_size, | |
3172 | error); | |
b128c09f BB |
3173 | if (error == ENOSPC && zio->io_size > SPA_MINBLOCKSIZE) |
3174 | return (zio_write_gang_block(zio)); | |
34dc7c2f BB |
3175 | zio->io_error = error; |
3176 | } | |
3177 | ||
3178 | return (ZIO_PIPELINE_CONTINUE); | |
3179 | } | |
3180 | ||
3181 | static int | |
3182 | zio_dva_free(zio_t *zio) | |
3183 | { | |
b128c09f | 3184 | metaslab_free(zio->io_spa, zio->io_bp, zio->io_txg, B_FALSE); |
34dc7c2f BB |
3185 | |
3186 | return (ZIO_PIPELINE_CONTINUE); | |
3187 | } | |
3188 | ||
3189 | static int | |
3190 | zio_dva_claim(zio_t *zio) | |
3191 | { | |
b128c09f BB |
3192 | int error; |
3193 | ||
3194 | error = metaslab_claim(zio->io_spa, zio->io_bp, zio->io_txg); | |
3195 | if (error) | |
3196 | zio->io_error = error; | |
34dc7c2f BB |
3197 | |
3198 | return (ZIO_PIPELINE_CONTINUE); | |
3199 | } | |
3200 | ||
b128c09f BB |
3201 | /* |
3202 | * Undo an allocation. This is used by zio_done() when an I/O fails | |
3203 | * and we want to give back the block we just allocated. | |
3204 | * This handles both normal blocks and gang blocks. | |
3205 | */ | |
3206 | static void | |
3207 | zio_dva_unallocate(zio_t *zio, zio_gang_node_t *gn, blkptr_t *bp) | |
3208 | { | |
b128c09f | 3209 | ASSERT(bp->blk_birth == zio->io_txg || BP_IS_HOLE(bp)); |
428870ff | 3210 | ASSERT(zio->io_bp_override == NULL); |
b128c09f BB |
3211 | |
3212 | if (!BP_IS_HOLE(bp)) | |
428870ff | 3213 | metaslab_free(zio->io_spa, bp, bp->blk_birth, B_TRUE); |
b128c09f BB |
3214 | |
3215 | if (gn != NULL) { | |
1c27024e | 3216 | for (int g = 0; g < SPA_GBH_NBLKPTRS; g++) { |
b128c09f BB |
3217 | zio_dva_unallocate(zio, gn->gn_child[g], |
3218 | &gn->gn_gbh->zg_blkptr[g]); | |
3219 | } | |
3220 | } | |
3221 | } | |
3222 | ||
3223 | /* | |
3224 | * Try to allocate an intent log block. Return 0 on success, errno on failure. | |
3225 | */ | |
3226 | int | |
b5256303 TC |
3227 | zio_alloc_zil(spa_t *spa, objset_t *os, uint64_t txg, blkptr_t *new_bp, |
3228 | uint64_t size, boolean_t *slog) | |
b128c09f | 3229 | { |
428870ff | 3230 | int error = 1; |
4e21fd06 | 3231 | zio_alloc_list_t io_alloc_list; |
b128c09f | 3232 | |
428870ff BB |
3233 | ASSERT(txg > spa_syncing_txg(spa)); |
3234 | ||
4e21fd06 | 3235 | metaslab_trace_init(&io_alloc_list); |
1b7c1e5c GDN |
3236 | error = metaslab_alloc(spa, spa_log_class(spa), size, new_bp, 1, |
3237 | txg, NULL, METASLAB_FASTWRITE, &io_alloc_list, NULL); | |
3238 | if (error == 0) { | |
3239 | *slog = TRUE; | |
3240 | } else { | |
428870ff | 3241 | error = metaslab_alloc(spa, spa_normal_class(spa), size, |
4e21fd06 DB |
3242 | new_bp, 1, txg, NULL, METASLAB_FASTWRITE, |
3243 | &io_alloc_list, NULL); | |
1b7c1e5c GDN |
3244 | if (error == 0) |
3245 | *slog = FALSE; | |
ebf8e3a2 | 3246 | } |
4e21fd06 | 3247 | metaslab_trace_fini(&io_alloc_list); |
b128c09f BB |
3248 | |
3249 | if (error == 0) { | |
3250 | BP_SET_LSIZE(new_bp, size); | |
3251 | BP_SET_PSIZE(new_bp, size); | |
3252 | BP_SET_COMPRESS(new_bp, ZIO_COMPRESS_OFF); | |
428870ff BB |
3253 | BP_SET_CHECKSUM(new_bp, |
3254 | spa_version(spa) >= SPA_VERSION_SLIM_ZIL | |
3255 | ? ZIO_CHECKSUM_ZILOG2 : ZIO_CHECKSUM_ZILOG); | |
b128c09f BB |
3256 | BP_SET_TYPE(new_bp, DMU_OT_INTENT_LOG); |
3257 | BP_SET_LEVEL(new_bp, 0); | |
428870ff | 3258 | BP_SET_DEDUP(new_bp, 0); |
b128c09f | 3259 | BP_SET_BYTEORDER(new_bp, ZFS_HOST_BYTEORDER); |
b5256303 TC |
3260 | |
3261 | /* | |
3262 | * encrypted blocks will require an IV and salt. We generate | |
3263 | * these now since we will not be rewriting the bp at | |
3264 | * rewrite time. | |
3265 | */ | |
3266 | if (os->os_encrypted) { | |
3267 | uint8_t iv[ZIO_DATA_IV_LEN]; | |
3268 | uint8_t salt[ZIO_DATA_SALT_LEN]; | |
3269 | ||
3270 | BP_SET_CRYPT(new_bp, B_TRUE); | |
3271 | VERIFY0(spa_crypt_get_salt(spa, | |
3272 | dmu_objset_id(os), salt)); | |
3273 | VERIFY0(zio_crypt_generate_iv(iv)); | |
3274 | ||
3275 | zio_crypt_encode_params_bp(new_bp, salt, iv); | |
3276 | } | |
b128c09f BB |
3277 | } |
3278 | ||
3279 | return (error); | |
3280 | } | |
3281 | ||
3282 | /* | |
428870ff | 3283 | * Free an intent log block. |
b128c09f BB |
3284 | */ |
3285 | void | |
428870ff | 3286 | zio_free_zil(spa_t *spa, uint64_t txg, blkptr_t *bp) |
b128c09f | 3287 | { |
428870ff | 3288 | ASSERT(BP_GET_TYPE(bp) == DMU_OT_INTENT_LOG); |
b128c09f BB |
3289 | ASSERT(!BP_IS_GANG(bp)); |
3290 | ||
428870ff | 3291 | zio_free(spa, txg, bp); |
b128c09f BB |
3292 | } |
3293 | ||
34dc7c2f BB |
3294 | /* |
3295 | * ========================================================================== | |
3296 | * Read and write to physical devices | |
3297 | * ========================================================================== | |
3298 | */ | |
98b25418 GW |
3299 | |
3300 | ||
3301 | /* | |
3302 | * Issue an I/O to the underlying vdev. Typically the issue pipeline | |
3303 | * stops after this stage and will resume upon I/O completion. | |
3304 | * However, there are instances where the vdev layer may need to | |
3305 | * continue the pipeline when an I/O was not issued. Since the I/O | |
3306 | * that was sent to the vdev layer might be different than the one | |
3307 | * currently active in the pipeline (see vdev_queue_io()), we explicitly | |
3308 | * force the underlying vdev layers to call either zio_execute() or | |
3309 | * zio_interrupt() to ensure that the pipeline continues with the correct I/O. | |
3310 | */ | |
34dc7c2f BB |
3311 | static int |
3312 | zio_vdev_io_start(zio_t *zio) | |
3313 | { | |
3314 | vdev_t *vd = zio->io_vd; | |
34dc7c2f BB |
3315 | uint64_t align; |
3316 | spa_t *spa = zio->io_spa; | |
3317 | ||
193a37cb TH |
3318 | zio->io_delay = 0; |
3319 | ||
b128c09f BB |
3320 | ASSERT(zio->io_error == 0); |
3321 | ASSERT(zio->io_child_error[ZIO_CHILD_VDEV] == 0); | |
34dc7c2f | 3322 | |
b128c09f BB |
3323 | if (vd == NULL) { |
3324 | if (!(zio->io_flags & ZIO_FLAG_CONFIG_WRITER)) | |
3325 | spa_config_enter(spa, SCL_ZIO, zio, RW_READER); | |
34dc7c2f | 3326 | |
b128c09f BB |
3327 | /* |
3328 | * The mirror_ops handle multiple DVAs in a single BP. | |
3329 | */ | |
98b25418 GW |
3330 | vdev_mirror_ops.vdev_op_io_start(zio); |
3331 | return (ZIO_PIPELINE_STOP); | |
34dc7c2f BB |
3332 | } |
3333 | ||
3dfb57a3 DB |
3334 | ASSERT3P(zio->io_logical, !=, zio); |
3335 | ||
572e2857 BB |
3336 | /* |
3337 | * We keep track of time-sensitive I/Os so that the scan thread | |
3338 | * can quickly react to certain workloads. In particular, we care | |
3339 | * about non-scrubbing, top-level reads and writes with the following | |
3340 | * characteristics: | |
98b25418 | 3341 | * - synchronous writes of user data to non-slog devices |
572e2857 BB |
3342 | * - any reads of user data |
3343 | * When these conditions are met, adjust the timestamp of spa_last_io | |
3344 | * which allows the scan thread to adjust its workload accordingly. | |
3345 | */ | |
3346 | if (!(zio->io_flags & ZIO_FLAG_SCAN_THREAD) && zio->io_bp != NULL && | |
3347 | vd == vd->vdev_top && !vd->vdev_islog && | |
3348 | zio->io_bookmark.zb_objset != DMU_META_OBJSET && | |
3349 | zio->io_txg != spa_syncing_txg(spa)) { | |
3350 | uint64_t old = spa->spa_last_io; | |
3351 | uint64_t new = ddi_get_lbolt64(); | |
3352 | if (old != new) | |
3353 | (void) atomic_cas_64(&spa->spa_last_io, old, new); | |
3354 | } | |
3355 | ||
b128c09f BB |
3356 | align = 1ULL << vd->vdev_top->vdev_ashift; |
3357 | ||
b02fe35d AR |
3358 | if (!(zio->io_flags & ZIO_FLAG_PHYSICAL) && |
3359 | P2PHASE(zio->io_size, align) != 0) { | |
3360 | /* Transform logical writes to be a full physical block size. */ | |
34dc7c2f | 3361 | uint64_t asize = P2ROUNDUP(zio->io_size, align); |
a6255b7f | 3362 | abd_t *abuf = abd_alloc_sametype(zio->io_abd, asize); |
178e73b3 | 3363 | ASSERT(vd == vd->vdev_top); |
34dc7c2f | 3364 | if (zio->io_type == ZIO_TYPE_WRITE) { |
a6255b7f DQ |
3365 | abd_copy(abuf, zio->io_abd, zio->io_size); |
3366 | abd_zero_off(abuf, zio->io_size, asize - zio->io_size); | |
34dc7c2f | 3367 | } |
b128c09f | 3368 | zio_push_transform(zio, abuf, asize, asize, zio_subblock); |
34dc7c2f BB |
3369 | } |
3370 | ||
b02fe35d AR |
3371 | /* |
3372 | * If this is not a physical io, make sure that it is properly aligned | |
3373 | * before proceeding. | |
3374 | */ | |
3375 | if (!(zio->io_flags & ZIO_FLAG_PHYSICAL)) { | |
3376 | ASSERT0(P2PHASE(zio->io_offset, align)); | |
3377 | ASSERT0(P2PHASE(zio->io_size, align)); | |
3378 | } else { | |
3379 | /* | |
3380 | * For physical writes, we allow 512b aligned writes and assume | |
3381 | * the device will perform a read-modify-write as necessary. | |
3382 | */ | |
3383 | ASSERT0(P2PHASE(zio->io_offset, SPA_MINBLOCKSIZE)); | |
3384 | ASSERT0(P2PHASE(zio->io_size, SPA_MINBLOCKSIZE)); | |
3385 | } | |
3386 | ||
572e2857 | 3387 | VERIFY(zio->io_type != ZIO_TYPE_WRITE || spa_writeable(spa)); |
fb5f0bc8 BB |
3388 | |
3389 | /* | |
3390 | * If this is a repair I/O, and there's no self-healing involved -- | |
3391 | * that is, we're just resilvering what we expect to resilver -- | |
3392 | * then don't do the I/O unless zio's txg is actually in vd's DTL. | |
3393 | * This prevents spurious resilvering with nested replication. | |
3394 | * For example, given a mirror of mirrors, (A+B)+(C+D), if only | |
3395 | * A is out of date, we'll read from C+D, then use the data to | |
3396 | * resilver A+B -- but we don't actually want to resilver B, just A. | |
3397 | * The top-level mirror has no way to know this, so instead we just | |
3398 | * discard unnecessary repairs as we work our way down the vdev tree. | |
3399 | * The same logic applies to any form of nested replication: | |
3400 | * ditto + mirror, RAID-Z + replacing, etc. This covers them all. | |
3401 | */ | |
3402 | if ((zio->io_flags & ZIO_FLAG_IO_REPAIR) && | |
3403 | !(zio->io_flags & ZIO_FLAG_SELF_HEAL) && | |
3404 | zio->io_txg != 0 && /* not a delegated i/o */ | |
3405 | !vdev_dtl_contains(vd, DTL_PARTIAL, zio->io_txg, 1)) { | |
3406 | ASSERT(zio->io_type == ZIO_TYPE_WRITE); | |
fb5f0bc8 BB |
3407 | zio_vdev_io_bypass(zio); |
3408 | return (ZIO_PIPELINE_CONTINUE); | |
3409 | } | |
34dc7c2f | 3410 | |
b128c09f BB |
3411 | if (vd->vdev_ops->vdev_op_leaf && |
3412 | (zio->io_type == ZIO_TYPE_READ || zio->io_type == ZIO_TYPE_WRITE)) { | |
3413 | ||
b0bc7a84 | 3414 | if (zio->io_type == ZIO_TYPE_READ && vdev_cache_read(zio)) |
d164b209 | 3415 | return (ZIO_PIPELINE_CONTINUE); |
b128c09f BB |
3416 | |
3417 | if ((zio = vdev_queue_io(zio)) == NULL) | |
3418 | return (ZIO_PIPELINE_STOP); | |
3419 | ||
3420 | if (!vdev_accessible(vd, zio)) { | |
2e528b49 | 3421 | zio->io_error = SET_ERROR(ENXIO); |
b128c09f BB |
3422 | zio_interrupt(zio); |
3423 | return (ZIO_PIPELINE_STOP); | |
3424 | } | |
67103816 | 3425 | zio->io_delay = gethrtime(); |
b128c09f BB |
3426 | } |
3427 | ||
98b25418 GW |
3428 | vd->vdev_ops->vdev_op_io_start(zio); |
3429 | return (ZIO_PIPELINE_STOP); | |
34dc7c2f BB |
3430 | } |
3431 | ||
3432 | static int | |
3433 | zio_vdev_io_done(zio_t *zio) | |
3434 | { | |
b128c09f BB |
3435 | vdev_t *vd = zio->io_vd; |
3436 | vdev_ops_t *ops = vd ? vd->vdev_ops : &vdev_mirror_ops; | |
3437 | boolean_t unexpected_error = B_FALSE; | |
34dc7c2f | 3438 | |
b128c09f BB |
3439 | if (zio_wait_for_children(zio, ZIO_CHILD_VDEV, ZIO_WAIT_DONE)) |
3440 | return (ZIO_PIPELINE_STOP); | |
34dc7c2f | 3441 | |
b128c09f BB |
3442 | ASSERT(zio->io_type == ZIO_TYPE_READ || zio->io_type == ZIO_TYPE_WRITE); |
3443 | ||
193a37cb TH |
3444 | if (zio->io_delay) |
3445 | zio->io_delay = gethrtime() - zio->io_delay; | |
3446 | ||
b128c09f BB |
3447 | if (vd != NULL && vd->vdev_ops->vdev_op_leaf) { |
3448 | ||
3449 | vdev_queue_io_done(zio); | |
3450 | ||
3451 | if (zio->io_type == ZIO_TYPE_WRITE) | |
3452 | vdev_cache_write(zio); | |
3453 | ||
3454 | if (zio_injection_enabled && zio->io_error == 0) | |
d977122d DB |
3455 | zio->io_error = zio_handle_device_injections(vd, zio, |
3456 | EIO, EILSEQ); | |
b128c09f BB |
3457 | |
3458 | if (zio_injection_enabled && zio->io_error == 0) | |
3459 | zio->io_error = zio_handle_label_injection(zio, EIO); | |
3460 | ||
3461 | if (zio->io_error) { | |
3462 | if (!vdev_accessible(vd, zio)) { | |
2e528b49 | 3463 | zio->io_error = SET_ERROR(ENXIO); |
b128c09f BB |
3464 | } else { |
3465 | unexpected_error = B_TRUE; | |
3466 | } | |
3467 | } | |
3468 | } | |
3469 | ||
3470 | ops->vdev_op_io_done(zio); | |
34dc7c2f | 3471 | |
f43615d0 | 3472 | if (unexpected_error) |
d164b209 | 3473 | VERIFY(vdev_probe(vd, zio) == NULL); |
34dc7c2f | 3474 | |
b128c09f | 3475 | return (ZIO_PIPELINE_CONTINUE); |
34dc7c2f BB |
3476 | } |
3477 | ||
428870ff BB |
3478 | /* |
3479 | * For non-raidz ZIOs, we can just copy aside the bad data read from the | |
3480 | * disk, and use that to finish the checksum ereport later. | |
3481 | */ | |
3482 | static void | |
3483 | zio_vsd_default_cksum_finish(zio_cksum_report_t *zcr, | |
84c07ada | 3484 | const abd_t *good_buf) |
428870ff BB |
3485 | { |
3486 | /* no processing needed */ | |
3487 | zfs_ereport_finish_checksum(zcr, good_buf, zcr->zcr_cbdata, B_FALSE); | |
3488 | } | |
3489 | ||
3490 | /*ARGSUSED*/ | |
3491 | void | |
3492 | zio_vsd_default_cksum_report(zio_t *zio, zio_cksum_report_t *zcr, void *ignored) | |
3493 | { | |
84c07ada | 3494 | void *abd = abd_alloc_sametype(zio->io_abd, zio->io_size); |
428870ff | 3495 | |
84c07ada | 3496 | abd_copy(abd, zio->io_abd, zio->io_size); |
428870ff BB |
3497 | |
3498 | zcr->zcr_cbinfo = zio->io_size; | |
84c07ada | 3499 | zcr->zcr_cbdata = abd; |
428870ff | 3500 | zcr->zcr_finish = zio_vsd_default_cksum_finish; |
84c07ada | 3501 | zcr->zcr_free = zio_abd_free; |
428870ff BB |
3502 | } |
3503 | ||
34dc7c2f BB |
3504 | static int |
3505 | zio_vdev_io_assess(zio_t *zio) | |
3506 | { | |
3507 | vdev_t *vd = zio->io_vd; | |
b128c09f BB |
3508 | |
3509 | if (zio_wait_for_children(zio, ZIO_CHILD_VDEV, ZIO_WAIT_DONE)) | |
3510 | return (ZIO_PIPELINE_STOP); | |
3511 | ||
3512 | if (vd == NULL && !(zio->io_flags & ZIO_FLAG_CONFIG_WRITER)) | |
3513 | spa_config_exit(zio->io_spa, SCL_ZIO, zio); | |
3514 | ||
3515 | if (zio->io_vsd != NULL) { | |
428870ff | 3516 | zio->io_vsd_ops->vsd_free(zio); |
b128c09f | 3517 | zio->io_vsd = NULL; |
34dc7c2f BB |
3518 | } |
3519 | ||
b128c09f | 3520 | if (zio_injection_enabled && zio->io_error == 0) |
34dc7c2f BB |
3521 | zio->io_error = zio_handle_fault_injection(zio, EIO); |
3522 | ||
3523 | /* | |
3524 | * If the I/O failed, determine whether we should attempt to retry it. | |
428870ff BB |
3525 | * |
3526 | * On retry, we cut in line in the issue queue, since we don't want | |
3527 | * compression/checksumming/etc. work to prevent our (cheap) IO reissue. | |
34dc7c2f | 3528 | */ |
b128c09f BB |
3529 | if (zio->io_error && vd == NULL && |
3530 | !(zio->io_flags & (ZIO_FLAG_DONT_RETRY | ZIO_FLAG_IO_RETRY))) { | |
3531 | ASSERT(!(zio->io_flags & ZIO_FLAG_DONT_QUEUE)); /* not a leaf */ | |
3532 | ASSERT(!(zio->io_flags & ZIO_FLAG_IO_BYPASS)); /* not a leaf */ | |
34dc7c2f | 3533 | zio->io_error = 0; |
b128c09f BB |
3534 | zio->io_flags |= ZIO_FLAG_IO_RETRY | |
3535 | ZIO_FLAG_DONT_CACHE | ZIO_FLAG_DONT_AGGREGATE; | |
428870ff BB |
3536 | zio->io_stage = ZIO_STAGE_VDEV_IO_START >> 1; |
3537 | zio_taskq_dispatch(zio, ZIO_TASKQ_ISSUE, | |
3538 | zio_requeue_io_start_cut_in_line); | |
b128c09f | 3539 | return (ZIO_PIPELINE_STOP); |
34dc7c2f BB |
3540 | } |
3541 | ||
b128c09f BB |
3542 | /* |
3543 | * If we got an error on a leaf device, convert it to ENXIO | |
3544 | * if the device is not accessible at all. | |
3545 | */ | |
3546 | if (zio->io_error && vd != NULL && vd->vdev_ops->vdev_op_leaf && | |
3547 | !vdev_accessible(vd, zio)) | |
2e528b49 | 3548 | zio->io_error = SET_ERROR(ENXIO); |
b128c09f BB |
3549 | |
3550 | /* | |
3551 | * If we can't write to an interior vdev (mirror or RAID-Z), | |
3552 | * set vdev_cant_write so that we stop trying to allocate from it. | |
3553 | */ | |
3554 | if (zio->io_error == ENXIO && zio->io_type == ZIO_TYPE_WRITE && | |
13fe0198 | 3555 | vd != NULL && !vd->vdev_ops->vdev_op_leaf) { |
b128c09f | 3556 | vd->vdev_cant_write = B_TRUE; |
13fe0198 | 3557 | } |
b128c09f | 3558 | |
298ec40b GM |
3559 | /* |
3560 | * If a cache flush returns ENOTSUP or ENOTTY, we know that no future | |
3561 | * attempts will ever succeed. In this case we set a persistent bit so | |
3562 | * that we don't bother with it in the future. | |
3563 | */ | |
3564 | if ((zio->io_error == ENOTSUP || zio->io_error == ENOTTY) && | |
3565 | zio->io_type == ZIO_TYPE_IOCTL && | |
3566 | zio->io_cmd == DKIOCFLUSHWRITECACHE && vd != NULL) | |
3567 | vd->vdev_nowritecache = B_TRUE; | |
3568 | ||
b128c09f BB |
3569 | if (zio->io_error) |
3570 | zio->io_pipeline = ZIO_INTERLOCK_PIPELINE; | |
3571 | ||
e8b96c60 MA |
3572 | if (vd != NULL && vd->vdev_ops->vdev_op_leaf && |
3573 | zio->io_physdone != NULL) { | |
3574 | ASSERT(!(zio->io_flags & ZIO_FLAG_DELEGATED)); | |
3575 | ASSERT(zio->io_child_type == ZIO_CHILD_VDEV); | |
3576 | zio->io_physdone(zio->io_logical); | |
3577 | } | |
3578 | ||
34dc7c2f BB |
3579 | return (ZIO_PIPELINE_CONTINUE); |
3580 | } | |
3581 | ||
3582 | void | |
3583 | zio_vdev_io_reissue(zio_t *zio) | |
3584 | { | |
3585 | ASSERT(zio->io_stage == ZIO_STAGE_VDEV_IO_START); | |
3586 | ASSERT(zio->io_error == 0); | |
3587 | ||
428870ff | 3588 | zio->io_stage >>= 1; |
34dc7c2f BB |
3589 | } |
3590 | ||
3591 | void | |
3592 | zio_vdev_io_redone(zio_t *zio) | |
3593 | { | |
3594 | ASSERT(zio->io_stage == ZIO_STAGE_VDEV_IO_DONE); | |
3595 | ||
428870ff | 3596 | zio->io_stage >>= 1; |
34dc7c2f BB |
3597 | } |
3598 | ||
3599 | void | |
3600 | zio_vdev_io_bypass(zio_t *zio) | |
3601 | { | |
3602 | ASSERT(zio->io_stage == ZIO_STAGE_VDEV_IO_START); | |
3603 | ASSERT(zio->io_error == 0); | |
3604 | ||
3605 | zio->io_flags |= ZIO_FLAG_IO_BYPASS; | |
428870ff | 3606 | zio->io_stage = ZIO_STAGE_VDEV_IO_ASSESS >> 1; |
34dc7c2f BB |
3607 | } |
3608 | ||
b5256303 TC |
3609 | /* |
3610 | * ========================================================================== | |
3611 | * Encrypt and store encryption parameters | |
3612 | * ========================================================================== | |
3613 | */ | |
3614 | ||
3615 | ||
3616 | /* | |
3617 | * This function is used for ZIO_STAGE_ENCRYPT. It is responsible for | |
3618 | * managing the storage of encryption parameters and passing them to the | |
3619 | * lower-level encryption functions. | |
3620 | */ | |
3621 | static int | |
3622 | zio_encrypt(zio_t *zio) | |
3623 | { | |
3624 | zio_prop_t *zp = &zio->io_prop; | |
3625 | spa_t *spa = zio->io_spa; | |
3626 | blkptr_t *bp = zio->io_bp; | |
3627 | uint64_t psize = BP_GET_PSIZE(bp); | |
3628 | dmu_object_type_t ot = BP_GET_TYPE(bp); | |
3629 | void *enc_buf = NULL; | |
3630 | abd_t *eabd = NULL; | |
3631 | uint8_t salt[ZIO_DATA_SALT_LEN]; | |
3632 | uint8_t iv[ZIO_DATA_IV_LEN]; | |
3633 | uint8_t mac[ZIO_DATA_MAC_LEN]; | |
3634 | boolean_t no_crypt = B_FALSE; | |
3635 | ||
3636 | /* the root zio already encrypted the data */ | |
3637 | if (zio->io_child_type == ZIO_CHILD_GANG) | |
3638 | return (ZIO_PIPELINE_CONTINUE); | |
3639 | ||
3640 | /* only ZIL blocks are re-encrypted on rewrite */ | |
3641 | if (!IO_IS_ALLOCATING(zio) && ot != DMU_OT_INTENT_LOG) | |
3642 | return (ZIO_PIPELINE_CONTINUE); | |
3643 | ||
3644 | if (!(zp->zp_encrypt || BP_IS_ENCRYPTED(bp))) { | |
3645 | BP_SET_CRYPT(bp, B_FALSE); | |
3646 | return (ZIO_PIPELINE_CONTINUE); | |
3647 | } | |
3648 | ||
3649 | /* if we are doing raw encryption set the provided encryption params */ | |
3650 | if (zio->io_flags & ZIO_FLAG_RAW_ENCRYPT) { | |
3651 | BP_SET_CRYPT(bp, B_TRUE); | |
3652 | BP_SET_BYTEORDER(bp, zp->zp_byteorder); | |
3653 | if (ot != DMU_OT_OBJSET) | |
3654 | zio_crypt_encode_mac_bp(bp, zp->zp_mac); | |
3655 | if (DMU_OT_IS_ENCRYPTED(ot)) | |
3656 | zio_crypt_encode_params_bp(bp, zp->zp_salt, zp->zp_iv); | |
3657 | return (ZIO_PIPELINE_CONTINUE); | |
3658 | } | |
3659 | ||
3660 | /* indirect blocks only maintain a cksum of the lower level MACs */ | |
3661 | if (BP_GET_LEVEL(bp) > 0) { | |
3662 | BP_SET_CRYPT(bp, B_TRUE); | |
3663 | VERIFY0(zio_crypt_do_indirect_mac_checksum_abd(B_TRUE, | |
3664 | zio->io_orig_abd, BP_GET_LSIZE(bp), BP_SHOULD_BYTESWAP(bp), | |
3665 | mac)); | |
3666 | zio_crypt_encode_mac_bp(bp, mac); | |
3667 | return (ZIO_PIPELINE_CONTINUE); | |
3668 | } | |
3669 | ||
3670 | /* | |
3671 | * Objset blocks are a special case since they have 2 256-bit MACs | |
3672 | * embedded within them. | |
3673 | */ | |
3674 | if (ot == DMU_OT_OBJSET) { | |
3675 | ASSERT0(DMU_OT_IS_ENCRYPTED(ot)); | |
3676 | ASSERT3U(BP_GET_COMPRESS(bp), ==, ZIO_COMPRESS_OFF); | |
3677 | BP_SET_CRYPT(bp, B_TRUE); | |
3678 | VERIFY0(spa_do_crypt_objset_mac_abd(B_TRUE, spa, | |
3679 | zio->io_bookmark.zb_objset, zio->io_abd, psize, | |
3680 | BP_SHOULD_BYTESWAP(bp))); | |
3681 | return (ZIO_PIPELINE_CONTINUE); | |
3682 | } | |
3683 | ||
3684 | /* unencrypted object types are only authenticated with a MAC */ | |
3685 | if (!DMU_OT_IS_ENCRYPTED(ot)) { | |
3686 | BP_SET_CRYPT(bp, B_TRUE); | |
3687 | VERIFY0(spa_do_crypt_mac_abd(B_TRUE, spa, | |
3688 | zio->io_bookmark.zb_objset, zio->io_abd, psize, mac)); | |
3689 | zio_crypt_encode_mac_bp(bp, mac); | |
3690 | return (ZIO_PIPELINE_CONTINUE); | |
3691 | } | |
3692 | ||
3693 | /* | |
3694 | * Later passes of sync-to-convergence may decide to rewrite data | |
3695 | * in place to avoid more disk reallocations. This presents a problem | |
3696 | * for encryption because this consitutes rewriting the new data with | |
3697 | * the same encryption key and IV. However, this only applies to blocks | |
3698 | * in the MOS (particularly the spacemaps) and we do not encrypt the | |
3699 | * MOS. We assert that the zio is allocating or an intent log write | |
3700 | * to enforce this. | |
3701 | */ | |
3702 | ASSERT(IO_IS_ALLOCATING(zio) || ot == DMU_OT_INTENT_LOG); | |
3703 | ASSERT(BP_GET_LEVEL(bp) == 0 || ot == DMU_OT_INTENT_LOG); | |
3704 | ASSERT(spa_feature_is_active(spa, SPA_FEATURE_ENCRYPTION)); | |
3705 | ASSERT3U(psize, !=, 0); | |
3706 | ||
3707 | enc_buf = zio_buf_alloc(psize); | |
3708 | eabd = abd_get_from_buf(enc_buf, psize); | |
3709 | abd_take_ownership_of_buf(eabd, B_TRUE); | |
3710 | ||
3711 | /* | |
3712 | * For an explanation of what encryption parameters are stored | |
3713 | * where, see the block comment in zio_crypt.c. | |
3714 | */ | |
3715 | if (ot == DMU_OT_INTENT_LOG) { | |
3716 | zio_crypt_decode_params_bp(bp, salt, iv); | |
3717 | } else { | |
3718 | BP_SET_CRYPT(bp, B_TRUE); | |
3719 | } | |
3720 | ||
3721 | /* Perform the encryption. This should not fail */ | |
3722 | VERIFY0(spa_do_crypt_abd(B_TRUE, spa, zio->io_bookmark.zb_objset, bp, | |
3723 | zio->io_txg, psize, zio->io_abd, eabd, iv, mac, salt, &no_crypt)); | |
3724 | ||
3725 | /* encode encryption metadata into the bp */ | |
3726 | if (ot == DMU_OT_INTENT_LOG) { | |
3727 | /* | |
3728 | * ZIL blocks store the MAC in the embedded checksum, so the | |
3729 | * transform must always be applied. | |
3730 | */ | |
3731 | zio_crypt_encode_mac_zil(enc_buf, mac); | |
3732 | zio_push_transform(zio, eabd, psize, psize, NULL); | |
3733 | } else { | |
3734 | BP_SET_CRYPT(bp, B_TRUE); | |
3735 | zio_crypt_encode_params_bp(bp, salt, iv); | |
3736 | zio_crypt_encode_mac_bp(bp, mac); | |
3737 | ||
3738 | if (no_crypt) { | |
3739 | ASSERT3U(ot, ==, DMU_OT_DNODE); | |
3740 | abd_free(eabd); | |
3741 | } else { | |
3742 | zio_push_transform(zio, eabd, psize, psize, NULL); | |
3743 | } | |
3744 | } | |
3745 | ||
3746 | return (ZIO_PIPELINE_CONTINUE); | |
3747 | } | |
3748 | ||
34dc7c2f BB |
3749 | /* |
3750 | * ========================================================================== | |
3751 | * Generate and verify checksums | |
3752 | * ========================================================================== | |
3753 | */ | |
3754 | static int | |
3755 | zio_checksum_generate(zio_t *zio) | |
3756 | { | |
34dc7c2f | 3757 | blkptr_t *bp = zio->io_bp; |
b128c09f | 3758 | enum zio_checksum checksum; |
34dc7c2f | 3759 | |
b128c09f BB |
3760 | if (bp == NULL) { |
3761 | /* | |
3762 | * This is zio_write_phys(). | |
3763 | * We're either generating a label checksum, or none at all. | |
3764 | */ | |
3765 | checksum = zio->io_prop.zp_checksum; | |
34dc7c2f | 3766 | |
b128c09f BB |
3767 | if (checksum == ZIO_CHECKSUM_OFF) |
3768 | return (ZIO_PIPELINE_CONTINUE); | |
3769 | ||
3770 | ASSERT(checksum == ZIO_CHECKSUM_LABEL); | |
3771 | } else { | |
3772 | if (BP_IS_GANG(bp) && zio->io_child_type == ZIO_CHILD_GANG) { | |
3773 | ASSERT(!IO_IS_ALLOCATING(zio)); | |
3774 | checksum = ZIO_CHECKSUM_GANG_HEADER; | |
3775 | } else { | |
3776 | checksum = BP_GET_CHECKSUM(bp); | |
3777 | } | |
3778 | } | |
34dc7c2f | 3779 | |
a6255b7f | 3780 | zio_checksum_compute(zio, checksum, zio->io_abd, zio->io_size); |
34dc7c2f BB |
3781 | |
3782 | return (ZIO_PIPELINE_CONTINUE); | |
3783 | } | |
3784 | ||
3785 | static int | |
b128c09f | 3786 | zio_checksum_verify(zio_t *zio) |
34dc7c2f | 3787 | { |
428870ff | 3788 | zio_bad_cksum_t info; |
b128c09f BB |
3789 | blkptr_t *bp = zio->io_bp; |
3790 | int error; | |
34dc7c2f | 3791 | |
428870ff BB |
3792 | ASSERT(zio->io_vd != NULL); |
3793 | ||
b128c09f BB |
3794 | if (bp == NULL) { |
3795 | /* | |
3796 | * This is zio_read_phys(). | |
3797 | * We're either verifying a label checksum, or nothing at all. | |
3798 | */ | |
3799 | if (zio->io_prop.zp_checksum == ZIO_CHECKSUM_OFF) | |
3800 | return (ZIO_PIPELINE_CONTINUE); | |
34dc7c2f | 3801 | |
b128c09f BB |
3802 | ASSERT(zio->io_prop.zp_checksum == ZIO_CHECKSUM_LABEL); |
3803 | } | |
34dc7c2f | 3804 | |
428870ff | 3805 | if ((error = zio_checksum_error(zio, &info)) != 0) { |
b128c09f | 3806 | zio->io_error = error; |
7a3066ff MA |
3807 | if (error == ECKSUM && |
3808 | !(zio->io_flags & ZIO_FLAG_SPECULATIVE)) { | |
428870ff | 3809 | zfs_ereport_start_checksum(zio->io_spa, |
b5256303 TC |
3810 | zio->io_vd, &zio->io_bookmark, zio, |
3811 | zio->io_offset, zio->io_size, NULL, &info); | |
b128c09f | 3812 | } |
34dc7c2f BB |
3813 | } |
3814 | ||
3815 | return (ZIO_PIPELINE_CONTINUE); | |
3816 | } | |
3817 | ||
3818 | /* | |
3819 | * Called by RAID-Z to ensure we don't compute the checksum twice. | |
3820 | */ | |
3821 | void | |
3822 | zio_checksum_verified(zio_t *zio) | |
3823 | { | |
428870ff | 3824 | zio->io_pipeline &= ~ZIO_STAGE_CHECKSUM_VERIFY; |
34dc7c2f BB |
3825 | } |
3826 | ||
3827 | /* | |
b128c09f BB |
3828 | * ========================================================================== |
3829 | * Error rank. Error are ranked in the order 0, ENXIO, ECKSUM, EIO, other. | |
9b67f605 | 3830 | * An error of 0 indicates success. ENXIO indicates whole-device failure, |
b128c09f BB |
3831 | * which may be transient (e.g. unplugged) or permament. ECKSUM and EIO |
3832 | * indicate errors that are specific to one I/O, and most likely permanent. | |
3833 | * Any other error is presumed to be worse because we weren't expecting it. | |
3834 | * ========================================================================== | |
34dc7c2f | 3835 | */ |
b128c09f BB |
3836 | int |
3837 | zio_worst_error(int e1, int e2) | |
34dc7c2f | 3838 | { |
b128c09f BB |
3839 | static int zio_error_rank[] = { 0, ENXIO, ECKSUM, EIO }; |
3840 | int r1, r2; | |
3841 | ||
3842 | for (r1 = 0; r1 < sizeof (zio_error_rank) / sizeof (int); r1++) | |
3843 | if (e1 == zio_error_rank[r1]) | |
3844 | break; | |
34dc7c2f | 3845 | |
b128c09f BB |
3846 | for (r2 = 0; r2 < sizeof (zio_error_rank) / sizeof (int); r2++) |
3847 | if (e2 == zio_error_rank[r2]) | |
3848 | break; | |
3849 | ||
3850 | return (r1 > r2 ? e1 : e2); | |
34dc7c2f BB |
3851 | } |
3852 | ||
3853 | /* | |
3854 | * ========================================================================== | |
b128c09f | 3855 | * I/O completion |
34dc7c2f BB |
3856 | * ========================================================================== |
3857 | */ | |
b128c09f BB |
3858 | static int |
3859 | zio_ready(zio_t *zio) | |
34dc7c2f | 3860 | { |
b128c09f | 3861 | blkptr_t *bp = zio->io_bp; |
d164b209 | 3862 | zio_t *pio, *pio_next; |
3dfb57a3 | 3863 | zio_link_t *zl = NULL; |
34dc7c2f | 3864 | |
428870ff BB |
3865 | if (zio_wait_for_children(zio, ZIO_CHILD_GANG, ZIO_WAIT_READY) || |
3866 | zio_wait_for_children(zio, ZIO_CHILD_DDT, ZIO_WAIT_READY)) | |
9babb374 | 3867 | return (ZIO_PIPELINE_STOP); |
34dc7c2f | 3868 | |
9babb374 | 3869 | if (zio->io_ready) { |
b128c09f | 3870 | ASSERT(IO_IS_ALLOCATING(zio)); |
03c6040b GW |
3871 | ASSERT(bp->blk_birth == zio->io_txg || BP_IS_HOLE(bp) || |
3872 | (zio->io_flags & ZIO_FLAG_NOPWRITE)); | |
b128c09f | 3873 | ASSERT(zio->io_children[ZIO_CHILD_GANG][ZIO_WAIT_READY] == 0); |
34dc7c2f | 3874 | |
b128c09f BB |
3875 | zio->io_ready(zio); |
3876 | } | |
34dc7c2f | 3877 | |
b128c09f BB |
3878 | if (bp != NULL && bp != &zio->io_bp_copy) |
3879 | zio->io_bp_copy = *bp; | |
34dc7c2f | 3880 | |
3dfb57a3 | 3881 | if (zio->io_error != 0) { |
b128c09f | 3882 | zio->io_pipeline = ZIO_INTERLOCK_PIPELINE; |
34dc7c2f | 3883 | |
3dfb57a3 DB |
3884 | if (zio->io_flags & ZIO_FLAG_IO_ALLOCATING) { |
3885 | ASSERT(IO_IS_ALLOCATING(zio)); | |
3886 | ASSERT(zio->io_priority == ZIO_PRIORITY_ASYNC_WRITE); | |
3887 | /* | |
3888 | * We were unable to allocate anything, unreserve and | |
3889 | * issue the next I/O to allocate. | |
3890 | */ | |
3891 | metaslab_class_throttle_unreserve( | |
3892 | spa_normal_class(zio->io_spa), | |
3893 | zio->io_prop.zp_copies, zio); | |
3894 | zio_allocate_dispatch(zio->io_spa); | |
3895 | } | |
3896 | } | |
3897 | ||
d164b209 BB |
3898 | mutex_enter(&zio->io_lock); |
3899 | zio->io_state[ZIO_WAIT_READY] = 1; | |
3dfb57a3 | 3900 | pio = zio_walk_parents(zio, &zl); |
d164b209 BB |
3901 | mutex_exit(&zio->io_lock); |
3902 | ||
3903 | /* | |
3904 | * As we notify zio's parents, new parents could be added. | |
3905 | * New parents go to the head of zio's io_parent_list, however, | |
3906 | * so we will (correctly) not notify them. The remainder of zio's | |
3907 | * io_parent_list, from 'pio_next' onward, cannot change because | |
3908 | * all parents must wait for us to be done before they can be done. | |
3909 | */ | |
3910 | for (; pio != NULL; pio = pio_next) { | |
3dfb57a3 | 3911 | pio_next = zio_walk_parents(zio, &zl); |
b128c09f | 3912 | zio_notify_parent(pio, zio, ZIO_WAIT_READY); |
d164b209 | 3913 | } |
34dc7c2f | 3914 | |
428870ff BB |
3915 | if (zio->io_flags & ZIO_FLAG_NODATA) { |
3916 | if (BP_IS_GANG(bp)) { | |
3917 | zio->io_flags &= ~ZIO_FLAG_NODATA; | |
3918 | } else { | |
a6255b7f | 3919 | ASSERT((uintptr_t)zio->io_abd < SPA_MAXBLOCKSIZE); |
428870ff BB |
3920 | zio->io_pipeline &= ~ZIO_VDEV_IO_STAGES; |
3921 | } | |
3922 | } | |
3923 | ||
3924 | if (zio_injection_enabled && | |
3925 | zio->io_spa->spa_syncing_txg == zio->io_txg) | |
3926 | zio_handle_ignored_writes(zio); | |
3927 | ||
b128c09f | 3928 | return (ZIO_PIPELINE_CONTINUE); |
34dc7c2f BB |
3929 | } |
3930 | ||
3dfb57a3 DB |
3931 | /* |
3932 | * Update the allocation throttle accounting. | |
3933 | */ | |
3934 | static void | |
3935 | zio_dva_throttle_done(zio_t *zio) | |
3936 | { | |
1c27024e | 3937 | ASSERTV(zio_t *lio = zio->io_logical); |
3dfb57a3 DB |
3938 | zio_t *pio = zio_unique_parent(zio); |
3939 | vdev_t *vd = zio->io_vd; | |
3940 | int flags = METASLAB_ASYNC_ALLOC; | |
3941 | ||
3942 | ASSERT3P(zio->io_bp, !=, NULL); | |
3943 | ASSERT3U(zio->io_type, ==, ZIO_TYPE_WRITE); | |
3944 | ASSERT3U(zio->io_priority, ==, ZIO_PRIORITY_ASYNC_WRITE); | |
3945 | ASSERT3U(zio->io_child_type, ==, ZIO_CHILD_VDEV); | |
3946 | ASSERT(vd != NULL); | |
3947 | ASSERT3P(vd, ==, vd->vdev_top); | |
21df134f SB |
3948 | ASSERT(zio_injection_enabled || !(zio->io_flags & ZIO_FLAG_IO_RETRY)); |
3949 | ASSERT(!(zio->io_flags & ZIO_FLAG_IO_REPAIR)); | |
3dfb57a3 DB |
3950 | ASSERT(zio->io_flags & ZIO_FLAG_IO_ALLOCATING); |
3951 | ASSERT(!(lio->io_flags & ZIO_FLAG_IO_REWRITE)); | |
3952 | ASSERT(!(lio->io_orig_flags & ZIO_FLAG_NODATA)); | |
3953 | ||
3954 | /* | |
3955 | * Parents of gang children can have two flavors -- ones that | |
3956 | * allocated the gang header (will have ZIO_FLAG_IO_REWRITE set) | |
3957 | * and ones that allocated the constituent blocks. The allocation | |
3958 | * throttle needs to know the allocating parent zio so we must find | |
3959 | * it here. | |
3960 | */ | |
3961 | if (pio->io_child_type == ZIO_CHILD_GANG) { | |
3962 | /* | |
3963 | * If our parent is a rewrite gang child then our grandparent | |
3964 | * would have been the one that performed the allocation. | |
3965 | */ | |
3966 | if (pio->io_flags & ZIO_FLAG_IO_REWRITE) | |
3967 | pio = zio_unique_parent(pio); | |
3968 | flags |= METASLAB_GANG_CHILD; | |
3969 | } | |
3970 | ||
3971 | ASSERT(IO_IS_ALLOCATING(pio)); | |
3972 | ASSERT3P(zio, !=, zio->io_logical); | |
3973 | ASSERT(zio->io_logical != NULL); | |
3974 | ASSERT(!(zio->io_flags & ZIO_FLAG_IO_REPAIR)); | |
3975 | ASSERT0(zio->io_flags & ZIO_FLAG_NOPWRITE); | |
3976 | ||
3977 | mutex_enter(&pio->io_lock); | |
3978 | metaslab_group_alloc_decrement(zio->io_spa, vd->vdev_id, pio, flags); | |
3979 | mutex_exit(&pio->io_lock); | |
3980 | ||
3981 | metaslab_class_throttle_unreserve(spa_normal_class(zio->io_spa), | |
3982 | 1, pio); | |
3983 | ||
3984 | /* | |
3985 | * Call into the pipeline to see if there is more work that | |
3986 | * needs to be done. If there is work to be done it will be | |
3987 | * dispatched to another taskq thread. | |
3988 | */ | |
3989 | zio_allocate_dispatch(zio->io_spa); | |
3990 | } | |
3991 | ||
b128c09f BB |
3992 | static int |
3993 | zio_done(zio_t *zio) | |
34dc7c2f | 3994 | { |
3dfb57a3 DB |
3995 | /* |
3996 | * Always attempt to keep stack usage minimal here since | |
3997 | * we can be called recurisvely up to 19 levels deep. | |
3998 | */ | |
84c07ada | 3999 | const uint64_t psize = zio->io_size; |
d164b209 | 4000 | zio_t *pio, *pio_next; |
3dfb57a3 | 4001 | zio_link_t *zl = NULL; |
34dc7c2f | 4002 | |
b128c09f | 4003 | /* |
9babb374 | 4004 | * If our children haven't all completed, |
b128c09f BB |
4005 | * wait for them and then repeat this pipeline stage. |
4006 | */ | |
4007 | if (zio_wait_for_children(zio, ZIO_CHILD_VDEV, ZIO_WAIT_DONE) || | |
4008 | zio_wait_for_children(zio, ZIO_CHILD_GANG, ZIO_WAIT_DONE) || | |
428870ff | 4009 | zio_wait_for_children(zio, ZIO_CHILD_DDT, ZIO_WAIT_DONE) || |
b128c09f BB |
4010 | zio_wait_for_children(zio, ZIO_CHILD_LOGICAL, ZIO_WAIT_DONE)) |
4011 | return (ZIO_PIPELINE_STOP); | |
34dc7c2f | 4012 | |
3dfb57a3 DB |
4013 | /* |
4014 | * If the allocation throttle is enabled, then update the accounting. | |
4015 | * We only track child I/Os that are part of an allocating async | |
4016 | * write. We must do this since the allocation is performed | |
4017 | * by the logical I/O but the actual write is done by child I/Os. | |
4018 | */ | |
4019 | if (zio->io_flags & ZIO_FLAG_IO_ALLOCATING && | |
4020 | zio->io_child_type == ZIO_CHILD_VDEV) { | |
4021 | ASSERT(spa_normal_class( | |
4022 | zio->io_spa)->mc_alloc_throttle_enabled); | |
4023 | zio_dva_throttle_done(zio); | |
4024 | } | |
4025 | ||
4026 | /* | |
4027 | * If the allocation throttle is enabled, verify that | |
4028 | * we have decremented the refcounts for every I/O that was throttled. | |
4029 | */ | |
4030 | if (zio->io_flags & ZIO_FLAG_IO_ALLOCATING) { | |
4031 | ASSERT(zio->io_type == ZIO_TYPE_WRITE); | |
4032 | ASSERT(zio->io_priority == ZIO_PRIORITY_ASYNC_WRITE); | |
4033 | ASSERT(zio->io_bp != NULL); | |
4034 | metaslab_group_alloc_verify(zio->io_spa, zio->io_bp, zio); | |
4035 | VERIFY(refcount_not_held( | |
4036 | &(spa_normal_class(zio->io_spa)->mc_alloc_slots), zio)); | |
4037 | } | |
4038 | ||
4039 | ||
1c27024e DB |
4040 | for (int c = 0; c < ZIO_CHILD_TYPES; c++) |
4041 | for (int w = 0; w < ZIO_WAIT_TYPES; w++) | |
b128c09f BB |
4042 | ASSERT(zio->io_children[c][w] == 0); |
4043 | ||
9b67f605 | 4044 | if (zio->io_bp != NULL && !BP_IS_EMBEDDED(zio->io_bp)) { |
c776b317 BB |
4045 | ASSERT(zio->io_bp->blk_pad[0] == 0); |
4046 | ASSERT(zio->io_bp->blk_pad[1] == 0); | |
d1d7e268 MK |
4047 | ASSERT(bcmp(zio->io_bp, &zio->io_bp_copy, |
4048 | sizeof (blkptr_t)) == 0 || | |
c776b317 BB |
4049 | (zio->io_bp == zio_unique_parent(zio)->io_bp)); |
4050 | if (zio->io_type == ZIO_TYPE_WRITE && !BP_IS_HOLE(zio->io_bp) && | |
428870ff | 4051 | zio->io_bp_override == NULL && |
b128c09f | 4052 | !(zio->io_flags & ZIO_FLAG_IO_REPAIR)) { |
c776b317 | 4053 | ASSERT(!BP_SHOULD_BYTESWAP(zio->io_bp)); |
d1d7e268 MK |
4054 | ASSERT3U(zio->io_prop.zp_copies, <=, |
4055 | BP_GET_NDVAS(zio->io_bp)); | |
c776b317 | 4056 | ASSERT(BP_COUNT_GANG(zio->io_bp) == 0 || |
d1d7e268 MK |
4057 | (BP_COUNT_GANG(zio->io_bp) == |
4058 | BP_GET_NDVAS(zio->io_bp))); | |
b128c09f | 4059 | } |
03c6040b GW |
4060 | if (zio->io_flags & ZIO_FLAG_NOPWRITE) |
4061 | VERIFY(BP_EQUAL(zio->io_bp, &zio->io_bp_orig)); | |
b128c09f BB |
4062 | } |
4063 | ||
4064 | /* | |
428870ff | 4065 | * If there were child vdev/gang/ddt errors, they apply to us now. |
b128c09f BB |
4066 | */ |
4067 | zio_inherit_child_errors(zio, ZIO_CHILD_VDEV); | |
4068 | zio_inherit_child_errors(zio, ZIO_CHILD_GANG); | |
428870ff BB |
4069 | zio_inherit_child_errors(zio, ZIO_CHILD_DDT); |
4070 | ||
4071 | /* | |
4072 | * If the I/O on the transformed data was successful, generate any | |
4073 | * checksum reports now while we still have the transformed data. | |
4074 | */ | |
4075 | if (zio->io_error == 0) { | |
4076 | while (zio->io_cksum_report != NULL) { | |
4077 | zio_cksum_report_t *zcr = zio->io_cksum_report; | |
4078 | uint64_t align = zcr->zcr_align; | |
a6255b7f | 4079 | uint64_t asize = P2ROUNDUP(psize, align); |
a6255b7f DQ |
4080 | abd_t *adata = zio->io_abd; |
4081 | ||
4082 | if (asize != psize) { | |
84c07ada | 4083 | adata = abd_alloc(asize, B_TRUE); |
a6255b7f DQ |
4084 | abd_copy(adata, zio->io_abd, psize); |
4085 | abd_zero_off(adata, psize, asize - psize); | |
428870ff BB |
4086 | } |
4087 | ||
4088 | zio->io_cksum_report = zcr->zcr_next; | |
4089 | zcr->zcr_next = NULL; | |
84c07ada | 4090 | zcr->zcr_finish(zcr, adata); |
428870ff BB |
4091 | zfs_ereport_free_checksum(zcr); |
4092 | ||
a6255b7f DQ |
4093 | if (asize != psize) |
4094 | abd_free(adata); | |
428870ff BB |
4095 | } |
4096 | } | |
b128c09f BB |
4097 | |
4098 | zio_pop_transforms(zio); /* note: may set zio->io_error */ | |
4099 | ||
a6255b7f | 4100 | vdev_stat_update(zio, psize); |
b128c09f | 4101 | |
a69052be | 4102 | /* |
cc92e9d0 | 4103 | * If this I/O is attached to a particular vdev is slow, exceeding |
72f53c56 MJ |
4104 | * 30 seconds to complete, post an error described the I/O delay. |
4105 | * We ignore these errors if the device is currently unavailable. | |
a69052be | 4106 | */ |
193a37cb | 4107 | if (zio->io_delay >= MSEC2NSEC(zio_delay_max)) { |
72f53c56 MJ |
4108 | if (zio->io_vd != NULL && !vdev_is_dead(zio->io_vd)) |
4109 | zfs_ereport_post(FM_EREPORT_ZFS_DELAY, zio->io_spa, | |
b5256303 | 4110 | zio->io_vd, &zio->io_bookmark, zio, 0, 0); |
72f53c56 | 4111 | } |
a69052be | 4112 | |
b128c09f BB |
4113 | if (zio->io_error) { |
4114 | /* | |
4115 | * If this I/O is attached to a particular vdev, | |
4116 | * generate an error message describing the I/O failure | |
4117 | * at the block level. We ignore these errors if the | |
4118 | * device is currently unavailable. | |
4119 | */ | |
c776b317 | 4120 | if (zio->io_error != ECKSUM && zio->io_vd != NULL && |
02730c33 | 4121 | !vdev_is_dead(zio->io_vd)) |
c776b317 | 4122 | zfs_ereport_post(FM_EREPORT_ZFS_IO, zio->io_spa, |
b5256303 | 4123 | zio->io_vd, &zio->io_bookmark, zio, 0, 0); |
34dc7c2f | 4124 | |
428870ff BB |
4125 | if ((zio->io_error == EIO || !(zio->io_flags & |
4126 | (ZIO_FLAG_SPECULATIVE | ZIO_FLAG_DONT_PROPAGATE))) && | |
c776b317 | 4127 | zio == zio->io_logical) { |
b128c09f BB |
4128 | /* |
4129 | * For logical I/O requests, tell the SPA to log the | |
4130 | * error and generate a logical data ereport. | |
4131 | */ | |
b5256303 | 4132 | spa_log_error(zio->io_spa, &zio->io_bookmark); |
d1d7e268 | 4133 | zfs_ereport_post(FM_EREPORT_ZFS_DATA, zio->io_spa, |
b5256303 | 4134 | NULL, &zio->io_bookmark, zio, 0, 0); |
b128c09f BB |
4135 | } |
4136 | } | |
34dc7c2f | 4137 | |
c776b317 | 4138 | if (zio->io_error && zio == zio->io_logical) { |
b128c09f BB |
4139 | /* |
4140 | * Determine whether zio should be reexecuted. This will | |
4141 | * propagate all the way to the root via zio_notify_parent(). | |
4142 | */ | |
c776b317 | 4143 | ASSERT(zio->io_vd == NULL && zio->io_bp != NULL); |
428870ff | 4144 | ASSERT(zio->io_child_type == ZIO_CHILD_LOGICAL); |
b128c09f | 4145 | |
428870ff BB |
4146 | if (IO_IS_ALLOCATING(zio) && |
4147 | !(zio->io_flags & ZIO_FLAG_CANFAIL)) { | |
b128c09f BB |
4148 | if (zio->io_error != ENOSPC) |
4149 | zio->io_reexecute |= ZIO_REEXECUTE_NOW; | |
4150 | else | |
4151 | zio->io_reexecute |= ZIO_REEXECUTE_SUSPEND; | |
428870ff | 4152 | } |
b128c09f BB |
4153 | |
4154 | if ((zio->io_type == ZIO_TYPE_READ || | |
4155 | zio->io_type == ZIO_TYPE_FREE) && | |
572e2857 | 4156 | !(zio->io_flags & ZIO_FLAG_SCAN_THREAD) && |
b128c09f | 4157 | zio->io_error == ENXIO && |
c776b317 BB |
4158 | spa_load_state(zio->io_spa) == SPA_LOAD_NONE && |
4159 | spa_get_failmode(zio->io_spa) != ZIO_FAILURE_MODE_CONTINUE) | |
b128c09f BB |
4160 | zio->io_reexecute |= ZIO_REEXECUTE_SUSPEND; |
4161 | ||
4162 | if (!(zio->io_flags & ZIO_FLAG_CANFAIL) && !zio->io_reexecute) | |
4163 | zio->io_reexecute |= ZIO_REEXECUTE_SUSPEND; | |
428870ff BB |
4164 | |
4165 | /* | |
4166 | * Here is a possibly good place to attempt to do | |
4167 | * either combinatorial reconstruction or error correction | |
4168 | * based on checksums. It also might be a good place | |
4169 | * to send out preliminary ereports before we suspend | |
4170 | * processing. | |
4171 | */ | |
34dc7c2f BB |
4172 | } |
4173 | ||
4174 | /* | |
b128c09f BB |
4175 | * If there were logical child errors, they apply to us now. |
4176 | * We defer this until now to avoid conflating logical child | |
4177 | * errors with errors that happened to the zio itself when | |
4178 | * updating vdev stats and reporting FMA events above. | |
34dc7c2f | 4179 | */ |
b128c09f | 4180 | zio_inherit_child_errors(zio, ZIO_CHILD_LOGICAL); |
34dc7c2f | 4181 | |
428870ff BB |
4182 | if ((zio->io_error || zio->io_reexecute) && |
4183 | IO_IS_ALLOCATING(zio) && zio->io_gang_leader == zio && | |
03c6040b | 4184 | !(zio->io_flags & (ZIO_FLAG_IO_REWRITE | ZIO_FLAG_NOPWRITE))) |
c776b317 | 4185 | zio_dva_unallocate(zio, zio->io_gang_tree, zio->io_bp); |
9babb374 BB |
4186 | |
4187 | zio_gang_tree_free(&zio->io_gang_tree); | |
4188 | ||
4189 | /* | |
4190 | * Godfather I/Os should never suspend. | |
4191 | */ | |
4192 | if ((zio->io_flags & ZIO_FLAG_GODFATHER) && | |
4193 | (zio->io_reexecute & ZIO_REEXECUTE_SUSPEND)) | |
a32494d2 | 4194 | zio->io_reexecute &= ~ZIO_REEXECUTE_SUSPEND; |
9babb374 | 4195 | |
b128c09f BB |
4196 | if (zio->io_reexecute) { |
4197 | /* | |
4198 | * This is a logical I/O that wants to reexecute. | |
4199 | * | |
4200 | * Reexecute is top-down. When an i/o fails, if it's not | |
4201 | * the root, it simply notifies its parent and sticks around. | |
4202 | * The parent, seeing that it still has children in zio_done(), | |
4203 | * does the same. This percolates all the way up to the root. | |
4204 | * The root i/o will reexecute or suspend the entire tree. | |
4205 | * | |
4206 | * This approach ensures that zio_reexecute() honors | |
4207 | * all the original i/o dependency relationships, e.g. | |
4208 | * parents not executing until children are ready. | |
4209 | */ | |
4210 | ASSERT(zio->io_child_type == ZIO_CHILD_LOGICAL); | |
34dc7c2f | 4211 | |
9babb374 | 4212 | zio->io_gang_leader = NULL; |
b128c09f | 4213 | |
d164b209 BB |
4214 | mutex_enter(&zio->io_lock); |
4215 | zio->io_state[ZIO_WAIT_DONE] = 1; | |
4216 | mutex_exit(&zio->io_lock); | |
4217 | ||
9babb374 BB |
4218 | /* |
4219 | * "The Godfather" I/O monitors its children but is | |
4220 | * not a true parent to them. It will track them through | |
4221 | * the pipeline but severs its ties whenever they get into | |
4222 | * trouble (e.g. suspended). This allows "The Godfather" | |
4223 | * I/O to return status without blocking. | |
4224 | */ | |
3dfb57a3 DB |
4225 | zl = NULL; |
4226 | for (pio = zio_walk_parents(zio, &zl); pio != NULL; | |
4227 | pio = pio_next) { | |
4228 | zio_link_t *remove_zl = zl; | |
4229 | pio_next = zio_walk_parents(zio, &zl); | |
9babb374 BB |
4230 | |
4231 | if ((pio->io_flags & ZIO_FLAG_GODFATHER) && | |
4232 | (zio->io_reexecute & ZIO_REEXECUTE_SUSPEND)) { | |
3dfb57a3 | 4233 | zio_remove_child(pio, zio, remove_zl); |
9babb374 BB |
4234 | zio_notify_parent(pio, zio, ZIO_WAIT_DONE); |
4235 | } | |
4236 | } | |
4237 | ||
d164b209 | 4238 | if ((pio = zio_unique_parent(zio)) != NULL) { |
b128c09f BB |
4239 | /* |
4240 | * We're not a root i/o, so there's nothing to do | |
4241 | * but notify our parent. Don't propagate errors | |
4242 | * upward since we haven't permanently failed yet. | |
4243 | */ | |
9babb374 | 4244 | ASSERT(!(zio->io_flags & ZIO_FLAG_GODFATHER)); |
b128c09f BB |
4245 | zio->io_flags |= ZIO_FLAG_DONT_PROPAGATE; |
4246 | zio_notify_parent(pio, zio, ZIO_WAIT_DONE); | |
4247 | } else if (zio->io_reexecute & ZIO_REEXECUTE_SUSPEND) { | |
4248 | /* | |
4249 | * We'd fail again if we reexecuted now, so suspend | |
4250 | * until conditions improve (e.g. device comes online). | |
4251 | */ | |
c776b317 | 4252 | zio_suspend(zio->io_spa, zio); |
b128c09f BB |
4253 | } else { |
4254 | /* | |
4255 | * Reexecution is potentially a huge amount of work. | |
4256 | * Hand it off to the otherwise-unused claim taskq. | |
4257 | */ | |
a38718a6 | 4258 | ASSERT(taskq_empty_ent(&zio->io_tqent)); |
7ef5e54e AL |
4259 | spa_taskq_dispatch_ent(zio->io_spa, |
4260 | ZIO_TYPE_CLAIM, ZIO_TASKQ_ISSUE, | |
a38718a6 GA |
4261 | (task_func_t *)zio_reexecute, zio, 0, |
4262 | &zio->io_tqent); | |
b128c09f BB |
4263 | } |
4264 | return (ZIO_PIPELINE_STOP); | |
34dc7c2f BB |
4265 | } |
4266 | ||
428870ff | 4267 | ASSERT(zio->io_child_count == 0); |
b128c09f BB |
4268 | ASSERT(zio->io_reexecute == 0); |
4269 | ASSERT(zio->io_error == 0 || (zio->io_flags & ZIO_FLAG_CANFAIL)); | |
34dc7c2f | 4270 | |
428870ff BB |
4271 | /* |
4272 | * Report any checksum errors, since the I/O is complete. | |
4273 | */ | |
4274 | while (zio->io_cksum_report != NULL) { | |
4275 | zio_cksum_report_t *zcr = zio->io_cksum_report; | |
4276 | zio->io_cksum_report = zcr->zcr_next; | |
4277 | zcr->zcr_next = NULL; | |
4278 | zcr->zcr_finish(zcr, NULL); | |
4279 | zfs_ereport_free_checksum(zcr); | |
4280 | } | |
4281 | ||
920dd524 | 4282 | if (zio->io_flags & ZIO_FLAG_FASTWRITE && zio->io_bp && |
9b67f605 MA |
4283 | !BP_IS_HOLE(zio->io_bp) && !BP_IS_EMBEDDED(zio->io_bp) && |
4284 | !(zio->io_flags & ZIO_FLAG_NOPWRITE)) { | |
920dd524 ED |
4285 | metaslab_fastwrite_unmark(zio->io_spa, zio->io_bp); |
4286 | } | |
4287 | ||
d164b209 BB |
4288 | /* |
4289 | * It is the responsibility of the done callback to ensure that this | |
4290 | * particular zio is no longer discoverable for adoption, and as | |
4291 | * such, cannot acquire any new parents. | |
4292 | */ | |
b128c09f BB |
4293 | if (zio->io_done) |
4294 | zio->io_done(zio); | |
34dc7c2f | 4295 | |
d164b209 BB |
4296 | mutex_enter(&zio->io_lock); |
4297 | zio->io_state[ZIO_WAIT_DONE] = 1; | |
4298 | mutex_exit(&zio->io_lock); | |
34dc7c2f | 4299 | |
3dfb57a3 DB |
4300 | zl = NULL; |
4301 | for (pio = zio_walk_parents(zio, &zl); pio != NULL; pio = pio_next) { | |
4302 | zio_link_t *remove_zl = zl; | |
4303 | pio_next = zio_walk_parents(zio, &zl); | |
4304 | zio_remove_child(pio, zio, remove_zl); | |
b128c09f BB |
4305 | zio_notify_parent(pio, zio, ZIO_WAIT_DONE); |
4306 | } | |
34dc7c2f | 4307 | |
b128c09f BB |
4308 | if (zio->io_waiter != NULL) { |
4309 | mutex_enter(&zio->io_lock); | |
4310 | zio->io_executor = NULL; | |
4311 | cv_broadcast(&zio->io_cv); | |
4312 | mutex_exit(&zio->io_lock); | |
4313 | } else { | |
4314 | zio_destroy(zio); | |
4315 | } | |
34dc7c2f | 4316 | |
b128c09f | 4317 | return (ZIO_PIPELINE_STOP); |
34dc7c2f BB |
4318 | } |
4319 | ||
4320 | /* | |
b128c09f BB |
4321 | * ========================================================================== |
4322 | * I/O pipeline definition | |
4323 | * ========================================================================== | |
34dc7c2f | 4324 | */ |
428870ff | 4325 | static zio_pipe_stage_t *zio_pipeline[] = { |
b128c09f | 4326 | NULL, |
b128c09f | 4327 | zio_read_bp_init, |
3dfb57a3 | 4328 | zio_write_bp_init, |
428870ff BB |
4329 | zio_free_bp_init, |
4330 | zio_issue_async, | |
3dfb57a3 | 4331 | zio_write_compress, |
b5256303 | 4332 | zio_encrypt, |
b128c09f | 4333 | zio_checksum_generate, |
03c6040b | 4334 | zio_nop_write, |
428870ff BB |
4335 | zio_ddt_read_start, |
4336 | zio_ddt_read_done, | |
4337 | zio_ddt_write, | |
4338 | zio_ddt_free, | |
b128c09f BB |
4339 | zio_gang_assemble, |
4340 | zio_gang_issue, | |
3dfb57a3 | 4341 | zio_dva_throttle, |
b128c09f BB |
4342 | zio_dva_allocate, |
4343 | zio_dva_free, | |
4344 | zio_dva_claim, | |
4345 | zio_ready, | |
4346 | zio_vdev_io_start, | |
4347 | zio_vdev_io_done, | |
4348 | zio_vdev_io_assess, | |
4349 | zio_checksum_verify, | |
4350 | zio_done | |
4351 | }; | |
c28b2279 | 4352 | |
9ae529ec | 4353 | |
9ae529ec | 4354 | |
9ae529ec | 4355 | |
fcff0f35 PD |
4356 | /* |
4357 | * Compare two zbookmark_phys_t's to see which we would reach first in a | |
4358 | * pre-order traversal of the object tree. | |
4359 | * | |
4360 | * This is simple in every case aside from the meta-dnode object. For all other | |
4361 | * objects, we traverse them in order (object 1 before object 2, and so on). | |
4362 | * However, all of these objects are traversed while traversing object 0, since | |
4363 | * the data it points to is the list of objects. Thus, we need to convert to a | |
4364 | * canonical representation so we can compare meta-dnode bookmarks to | |
4365 | * non-meta-dnode bookmarks. | |
4366 | * | |
4367 | * We do this by calculating "equivalents" for each field of the zbookmark. | |
4368 | * zbookmarks outside of the meta-dnode use their own object and level, and | |
4369 | * calculate the level 0 equivalent (the first L0 blkid that is contained in the | |
4370 | * blocks this bookmark refers to) by multiplying their blkid by their span | |
4371 | * (the number of L0 blocks contained within one block at their level). | |
4372 | * zbookmarks inside the meta-dnode calculate their object equivalent | |
4373 | * (which is L0equiv * dnodes per data block), use 0 for their L0equiv, and use | |
4374 | * level + 1<<31 (any value larger than a level could ever be) for their level. | |
4375 | * This causes them to always compare before a bookmark in their object | |
4376 | * equivalent, compare appropriately to bookmarks in other objects, and to | |
4377 | * compare appropriately to other bookmarks in the meta-dnode. | |
4378 | */ | |
4379 | int | |
4380 | zbookmark_compare(uint16_t dbss1, uint8_t ibs1, uint16_t dbss2, uint8_t ibs2, | |
4381 | const zbookmark_phys_t *zb1, const zbookmark_phys_t *zb2) | |
4382 | { | |
4383 | /* | |
4384 | * These variables represent the "equivalent" values for the zbookmark, | |
4385 | * after converting zbookmarks inside the meta dnode to their | |
4386 | * normal-object equivalents. | |
4387 | */ | |
4388 | uint64_t zb1obj, zb2obj; | |
4389 | uint64_t zb1L0, zb2L0; | |
4390 | uint64_t zb1level, zb2level; | |
4391 | ||
4392 | if (zb1->zb_object == zb2->zb_object && | |
4393 | zb1->zb_level == zb2->zb_level && | |
4394 | zb1->zb_blkid == zb2->zb_blkid) | |
4395 | return (0); | |
9ae529ec | 4396 | |
fcff0f35 PD |
4397 | /* |
4398 | * BP_SPANB calculates the span in blocks. | |
4399 | */ | |
4400 | zb1L0 = (zb1->zb_blkid) * BP_SPANB(ibs1, zb1->zb_level); | |
4401 | zb2L0 = (zb2->zb_blkid) * BP_SPANB(ibs2, zb2->zb_level); | |
9ae529ec CS |
4402 | |
4403 | if (zb1->zb_object == DMU_META_DNODE_OBJECT) { | |
fcff0f35 PD |
4404 | zb1obj = zb1L0 * (dbss1 << (SPA_MINBLOCKSHIFT - DNODE_SHIFT)); |
4405 | zb1L0 = 0; | |
4406 | zb1level = zb1->zb_level + COMPARE_META_LEVEL; | |
4407 | } else { | |
4408 | zb1obj = zb1->zb_object; | |
4409 | zb1level = zb1->zb_level; | |
9ae529ec CS |
4410 | } |
4411 | ||
fcff0f35 PD |
4412 | if (zb2->zb_object == DMU_META_DNODE_OBJECT) { |
4413 | zb2obj = zb2L0 * (dbss2 << (SPA_MINBLOCKSHIFT - DNODE_SHIFT)); | |
4414 | zb2L0 = 0; | |
4415 | zb2level = zb2->zb_level + COMPARE_META_LEVEL; | |
4416 | } else { | |
4417 | zb2obj = zb2->zb_object; | |
4418 | zb2level = zb2->zb_level; | |
4419 | } | |
4420 | ||
4421 | /* Now that we have a canonical representation, do the comparison. */ | |
4422 | if (zb1obj != zb2obj) | |
4423 | return (zb1obj < zb2obj ? -1 : 1); | |
4424 | else if (zb1L0 != zb2L0) | |
4425 | return (zb1L0 < zb2L0 ? -1 : 1); | |
4426 | else if (zb1level != zb2level) | |
4427 | return (zb1level > zb2level ? -1 : 1); | |
4428 | /* | |
4429 | * This can (theoretically) happen if the bookmarks have the same object | |
4430 | * and level, but different blkids, if the block sizes are not the same. | |
4431 | * There is presently no way to change the indirect block sizes | |
4432 | */ | |
4433 | return (0); | |
4434 | } | |
4435 | ||
4436 | /* | |
4437 | * This function checks the following: given that last_block is the place that | |
4438 | * our traversal stopped last time, does that guarantee that we've visited | |
4439 | * every node under subtree_root? Therefore, we can't just use the raw output | |
4440 | * of zbookmark_compare. We have to pass in a modified version of | |
4441 | * subtree_root; by incrementing the block id, and then checking whether | |
4442 | * last_block is before or equal to that, we can tell whether or not having | |
4443 | * visited last_block implies that all of subtree_root's children have been | |
4444 | * visited. | |
4445 | */ | |
4446 | boolean_t | |
4447 | zbookmark_subtree_completed(const dnode_phys_t *dnp, | |
4448 | const zbookmark_phys_t *subtree_root, const zbookmark_phys_t *last_block) | |
4449 | { | |
4450 | zbookmark_phys_t mod_zb = *subtree_root; | |
4451 | mod_zb.zb_blkid++; | |
4452 | ASSERT(last_block->zb_level == 0); | |
4453 | ||
4454 | /* The objset_phys_t isn't before anything. */ | |
4455 | if (dnp == NULL) | |
9ae529ec | 4456 | return (B_FALSE); |
fcff0f35 PD |
4457 | |
4458 | /* | |
4459 | * We pass in 1ULL << (DNODE_BLOCK_SHIFT - SPA_MINBLOCKSHIFT) for the | |
4460 | * data block size in sectors, because that variable is only used if | |
4461 | * the bookmark refers to a block in the meta-dnode. Since we don't | |
4462 | * know without examining it what object it refers to, and there's no | |
4463 | * harm in passing in this value in other cases, we always pass it in. | |
4464 | * | |
4465 | * We pass in 0 for the indirect block size shift because zb2 must be | |
4466 | * level 0. The indirect block size is only used to calculate the span | |
4467 | * of the bookmark, but since the bookmark must be level 0, the span is | |
4468 | * always 1, so the math works out. | |
4469 | * | |
4470 | * If you make changes to how the zbookmark_compare code works, be sure | |
4471 | * to make sure that this code still works afterwards. | |
4472 | */ | |
4473 | return (zbookmark_compare(dnp->dn_datablkszsec, dnp->dn_indblkshift, | |
4474 | 1ULL << (DNODE_BLOCK_SHIFT - SPA_MINBLOCKSHIFT), 0, &mod_zb, | |
4475 | last_block) <= 0); | |
9ae529ec CS |
4476 | } |
4477 | ||
c28b2279 | 4478 | #if defined(_KERNEL) && defined(HAVE_SPL) |
c28b2279 | 4479 | EXPORT_SYMBOL(zio_type_name); |
81971b13 BB |
4480 | EXPORT_SYMBOL(zio_buf_alloc); |
4481 | EXPORT_SYMBOL(zio_data_buf_alloc); | |
4482 | EXPORT_SYMBOL(zio_buf_free); | |
4483 | EXPORT_SYMBOL(zio_data_buf_free); | |
c28b2279 | 4484 | |
a69052be | 4485 | module_param(zio_delay_max, int, 0644); |
c409e464 BB |
4486 | MODULE_PARM_DESC(zio_delay_max, "Max zio millisec delay before posting event"); |
4487 | ||
4488 | module_param(zio_requeue_io_start_cut_in_line, int, 0644); | |
4489 | MODULE_PARM_DESC(zio_requeue_io_start_cut_in_line, "Prioritize requeued I/O"); | |
29dee3ee CP |
4490 | |
4491 | module_param(zfs_sync_pass_deferred_free, int, 0644); | |
4492 | MODULE_PARM_DESC(zfs_sync_pass_deferred_free, | |
d1d7e268 | 4493 | "Defer frees starting in this pass"); |
29dee3ee CP |
4494 | |
4495 | module_param(zfs_sync_pass_dont_compress, int, 0644); | |
4496 | MODULE_PARM_DESC(zfs_sync_pass_dont_compress, | |
d1d7e268 | 4497 | "Don't compress starting in this pass"); |
29dee3ee CP |
4498 | |
4499 | module_param(zfs_sync_pass_rewrite, int, 0644); | |
4500 | MODULE_PARM_DESC(zfs_sync_pass_rewrite, | |
d1d7e268 | 4501 | "Rewrite new bps starting in this pass"); |
3dfb57a3 DB |
4502 | |
4503 | module_param(zio_dva_throttle_enabled, int, 0644); | |
4504 | MODULE_PARM_DESC(zio_dva_throttle_enabled, | |
4505 | "Throttle block allocations in the ZIO pipeline"); | |
c28b2279 | 4506 | #endif |