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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. |
4f072827 | 23 | * Copyright (c) 2011, 2020 by Delphix. All rights reserved. |
a38718a6 | 24 | * Copyright (c) 2011 Nexenta Systems, Inc. All rights reserved. |
cc99f275 | 25 | * Copyright (c) 2017, Intel Corporation. |
10b3c7f5 MN |
26 | * Copyright (c) 2019, Klara Inc. |
27 | * Copyright (c) 2019, Allan Jude | |
f2286383 | 28 | * Copyright (c) 2021, Datto, Inc. |
34dc7c2f BB |
29 | */ |
30 | ||
f1512ee6 | 31 | #include <sys/sysmacros.h> |
34dc7c2f BB |
32 | #include <sys/zfs_context.h> |
33 | #include <sys/fm/fs/zfs.h> | |
34 | #include <sys/spa.h> | |
35 | #include <sys/txg.h> | |
36 | #include <sys/spa_impl.h> | |
37 | #include <sys/vdev_impl.h> | |
1b939560 | 38 | #include <sys/vdev_trim.h> |
34dc7c2f BB |
39 | #include <sys/zio_impl.h> |
40 | #include <sys/zio_compress.h> | |
41 | #include <sys/zio_checksum.h> | |
428870ff BB |
42 | #include <sys/dmu_objset.h> |
43 | #include <sys/arc.h> | |
44 | #include <sys/ddt.h> | |
9b67f605 | 45 | #include <sys/blkptr.h> |
b0bc7a84 | 46 | #include <sys/zfeature.h> |
d4a72f23 | 47 | #include <sys/dsl_scan.h> |
3dfb57a3 | 48 | #include <sys/metaslab_impl.h> |
193a37cb | 49 | #include <sys/time.h> |
e5d1c27e | 50 | #include <sys/trace_zfs.h> |
a6255b7f | 51 | #include <sys/abd.h> |
b5256303 | 52 | #include <sys/dsl_crypt.h> |
3f387973 | 53 | #include <cityhash.h> |
34dc7c2f | 54 | |
34dc7c2f BB |
55 | /* |
56 | * ========================================================================== | |
57 | * I/O type descriptions | |
58 | * ========================================================================== | |
59 | */ | |
18168da7 | 60 | const char *const zio_type_name[ZIO_TYPES] = { |
3dfb57a3 DB |
61 | /* |
62 | * Note: Linux kernel thread name length is limited | |
63 | * so these names will differ from upstream open zfs. | |
64 | */ | |
1b939560 | 65 | "z_null", "z_rd", "z_wr", "z_fr", "z_cl", "z_ioctl", "z_trim" |
428870ff | 66 | }; |
34dc7c2f | 67 | |
27f2b90d | 68 | int zio_dva_throttle_enabled = B_TRUE; |
18168da7 | 69 | static int zio_deadman_log_all = B_FALSE; |
3dfb57a3 | 70 | |
34dc7c2f BB |
71 | /* |
72 | * ========================================================================== | |
73 | * I/O kmem caches | |
74 | * ========================================================================== | |
75 | */ | |
18168da7 AZ |
76 | static kmem_cache_t *zio_cache; |
77 | static kmem_cache_t *zio_link_cache; | |
34dc7c2f BB |
78 | kmem_cache_t *zio_buf_cache[SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT]; |
79 | kmem_cache_t *zio_data_buf_cache[SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT]; | |
a6255b7f | 80 | #if defined(ZFS_DEBUG) && !defined(_KERNEL) |
18168da7 AZ |
81 | static uint64_t zio_buf_cache_allocs[SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT]; |
82 | static uint64_t zio_buf_cache_frees[SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT]; | |
a6255b7f DQ |
83 | #endif |
84 | ||
ad796b8a | 85 | /* Mark IOs as "slow" if they take longer than 30 seconds */ |
18168da7 | 86 | static int zio_slow_io_ms = (30 * MILLISEC); |
34dc7c2f | 87 | |
fcff0f35 PD |
88 | #define BP_SPANB(indblkshift, level) \ |
89 | (((uint64_t)1) << ((level) * ((indblkshift) - SPA_BLKPTRSHIFT))) | |
90 | #define COMPARE_META_LEVEL 0x80000000ul | |
55d85d5a GW |
91 | /* |
92 | * The following actions directly effect the spa's sync-to-convergence logic. | |
93 | * The values below define the sync pass when we start performing the action. | |
94 | * Care should be taken when changing these values as they directly impact | |
95 | * spa_sync() performance. Tuning these values may introduce subtle performance | |
96 | * pathologies and should only be done in the context of performance analysis. | |
97 | * These tunables will eventually be removed and replaced with #defines once | |
98 | * enough analysis has been done to determine optimal values. | |
99 | * | |
100 | * The 'zfs_sync_pass_deferred_free' pass must be greater than 1 to ensure that | |
101 | * regular blocks are not deferred. | |
be89734a MA |
102 | * |
103 | * Starting in sync pass 8 (zfs_sync_pass_dont_compress), we disable | |
104 | * compression (including of metadata). In practice, we don't have this | |
105 | * many sync passes, so this has no effect. | |
106 | * | |
107 | * The original intent was that disabling compression would help the sync | |
108 | * passes to converge. However, in practice disabling compression increases | |
109 | * the average number of sync passes, because when we turn compression off, a | |
110 | * lot of block's size will change and thus we have to re-allocate (not | |
111 | * overwrite) them. It also increases the number of 128KB allocations (e.g. | |
112 | * for indirect blocks and spacemaps) because these will not be compressed. | |
113 | * The 128K allocations are especially detrimental to performance on highly | |
114 | * fragmented systems, which may have very few free segments of this size, | |
115 | * and may need to load new metaslabs to satisfy 128K allocations. | |
55d85d5a GW |
116 | */ |
117 | int zfs_sync_pass_deferred_free = 2; /* defer frees starting in this pass */ | |
18168da7 AZ |
118 | static int zfs_sync_pass_dont_compress = 8; /* don't compress s. i. t. p. */ |
119 | static int zfs_sync_pass_rewrite = 2; /* rewrite new bps s. i. t. p. */ | |
55d85d5a | 120 | |
34dc7c2f | 121 | /* |
b128c09f BB |
122 | * An allocating zio is one that either currently has the DVA allocate |
123 | * stage set or will have it later in its lifetime. | |
34dc7c2f | 124 | */ |
428870ff BB |
125 | #define IO_IS_ALLOCATING(zio) ((zio)->io_orig_pipeline & ZIO_STAGE_DVA_ALLOCATE) |
126 | ||
3c502d3b MM |
127 | /* |
128 | * Enable smaller cores by excluding metadata | |
129 | * allocations as well. | |
130 | */ | |
131 | int zio_exclude_metadata = 0; | |
18168da7 | 132 | static int zio_requeue_io_start_cut_in_line = 1; |
428870ff BB |
133 | |
134 | #ifdef ZFS_DEBUG | |
18168da7 | 135 | static const int zio_buf_debug_limit = 16384; |
428870ff | 136 | #else |
18168da7 | 137 | static const int zio_buf_debug_limit = 0; |
428870ff | 138 | #endif |
34dc7c2f | 139 | |
da6b4005 NB |
140 | static inline void __zio_execute(zio_t *zio); |
141 | ||
3dfb57a3 DB |
142 | static void zio_taskq_dispatch(zio_t *, zio_taskq_type_t, boolean_t); |
143 | ||
34dc7c2f BB |
144 | void |
145 | zio_init(void) | |
146 | { | |
147 | size_t c; | |
34dc7c2f | 148 | |
3941503c BB |
149 | zio_cache = kmem_cache_create("zio_cache", |
150 | sizeof (zio_t), 0, NULL, NULL, NULL, NULL, NULL, 0); | |
d164b209 | 151 | zio_link_cache = kmem_cache_create("zio_link_cache", |
6795a698 | 152 | sizeof (zio_link_t), 0, NULL, NULL, NULL, NULL, NULL, 0); |
34dc7c2f BB |
153 | |
154 | /* | |
155 | * For small buffers, we want a cache for each multiple of | |
f1512ee6 MA |
156 | * SPA_MINBLOCKSIZE. For larger buffers, we want a cache |
157 | * for each quarter-power of 2. | |
34dc7c2f BB |
158 | */ |
159 | for (c = 0; c < SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT; c++) { | |
160 | size_t size = (c + 1) << SPA_MINBLOCKSHIFT; | |
161 | size_t p2 = size; | |
162 | size_t align = 0; | |
3c502d3b MM |
163 | size_t data_cflags, cflags; |
164 | ||
165 | data_cflags = KMC_NODEBUG; | |
166 | cflags = (zio_exclude_metadata || size > zio_buf_debug_limit) ? | |
167 | KMC_NODEBUG : 0; | |
34dc7c2f | 168 | |
f1512ee6 | 169 | while (!ISP2(p2)) |
34dc7c2f BB |
170 | p2 &= p2 - 1; |
171 | ||
498877ba MA |
172 | #ifndef _KERNEL |
173 | /* | |
174 | * If we are using watchpoints, put each buffer on its own page, | |
175 | * to eliminate the performance overhead of trapping to the | |
176 | * kernel when modifying a non-watched buffer that shares the | |
177 | * page with a watched buffer. | |
178 | */ | |
179 | if (arc_watch && !IS_P2ALIGNED(size, PAGESIZE)) | |
180 | continue; | |
fcf64f45 BB |
181 | /* |
182 | * Here's the problem - on 4K native devices in userland on | |
183 | * Linux using O_DIRECT, buffers must be 4K aligned or I/O | |
184 | * will fail with EINVAL, causing zdb (and others) to coredump. | |
185 | * Since userland probably doesn't need optimized buffer caches, | |
186 | * we just force 4K alignment on everything. | |
187 | */ | |
188 | align = 8 * SPA_MINBLOCKSIZE; | |
189 | #else | |
24fa2034 | 190 | if (size < PAGESIZE) { |
34dc7c2f | 191 | align = SPA_MINBLOCKSIZE; |
498877ba | 192 | } else if (IS_P2ALIGNED(size, p2 >> 2)) { |
24fa2034 | 193 | align = PAGESIZE; |
34dc7c2f | 194 | } |
fcf64f45 | 195 | #endif |
34dc7c2f BB |
196 | |
197 | if (align != 0) { | |
198 | char name[36]; | |
309c32c9 MG |
199 | if (cflags == data_cflags) { |
200 | /* | |
201 | * Resulting kmem caches would be identical. | |
202 | * Save memory by creating only one. | |
203 | */ | |
204 | (void) snprintf(name, sizeof (name), | |
205 | "zio_buf_comb_%lu", (ulong_t)size); | |
206 | zio_buf_cache[c] = kmem_cache_create(name, | |
207 | size, align, NULL, NULL, NULL, NULL, NULL, | |
208 | cflags); | |
209 | zio_data_buf_cache[c] = zio_buf_cache[c]; | |
210 | continue; | |
211 | } | |
c9e319fa JL |
212 | (void) snprintf(name, sizeof (name), "zio_buf_%lu", |
213 | (ulong_t)size); | |
34dc7c2f | 214 | zio_buf_cache[c] = kmem_cache_create(name, size, |
6442f3cf | 215 | align, NULL, NULL, NULL, NULL, NULL, cflags); |
34dc7c2f | 216 | |
c9e319fa JL |
217 | (void) snprintf(name, sizeof (name), "zio_data_buf_%lu", |
218 | (ulong_t)size); | |
34dc7c2f | 219 | zio_data_buf_cache[c] = kmem_cache_create(name, size, |
18ca574f | 220 | align, NULL, NULL, NULL, NULL, NULL, data_cflags); |
34dc7c2f BB |
221 | } |
222 | } | |
223 | ||
224 | while (--c != 0) { | |
225 | ASSERT(zio_buf_cache[c] != NULL); | |
226 | if (zio_buf_cache[c - 1] == NULL) | |
227 | zio_buf_cache[c - 1] = zio_buf_cache[c]; | |
228 | ||
229 | ASSERT(zio_data_buf_cache[c] != NULL); | |
230 | if (zio_data_buf_cache[c - 1] == NULL) | |
231 | zio_data_buf_cache[c - 1] = zio_data_buf_cache[c]; | |
232 | } | |
233 | ||
34dc7c2f | 234 | zio_inject_init(); |
9759c60f ED |
235 | |
236 | lz4_init(); | |
34dc7c2f BB |
237 | } |
238 | ||
239 | void | |
240 | zio_fini(void) | |
241 | { | |
309c32c9 | 242 | size_t n = SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT; |
34dc7c2f | 243 | |
a6255b7f | 244 | #if defined(ZFS_DEBUG) && !defined(_KERNEL) |
309c32c9 MG |
245 | for (size_t i = 0; i < n; i++) { |
246 | if (zio_buf_cache_allocs[i] != zio_buf_cache_frees[i]) | |
a6255b7f | 247 | (void) printf("zio_fini: [%d] %llu != %llu\n", |
309c32c9 MG |
248 | (int)((i + 1) << SPA_MINBLOCKSHIFT), |
249 | (long long unsigned)zio_buf_cache_allocs[i], | |
250 | (long long unsigned)zio_buf_cache_frees[i]); | |
251 | } | |
f1512ee6 | 252 | #endif |
309c32c9 MG |
253 | |
254 | /* | |
255 | * The same kmem cache can show up multiple times in both zio_buf_cache | |
256 | * and zio_data_buf_cache. Do a wasteful but trivially correct scan to | |
257 | * sort it out. | |
258 | */ | |
259 | for (size_t i = 0; i < n; i++) { | |
260 | kmem_cache_t *cache = zio_buf_cache[i]; | |
261 | if (cache == NULL) | |
262 | continue; | |
263 | for (size_t j = i; j < n; j++) { | |
264 | if (cache == zio_buf_cache[j]) | |
265 | zio_buf_cache[j] = NULL; | |
266 | if (cache == zio_data_buf_cache[j]) | |
267 | zio_data_buf_cache[j] = NULL; | |
34dc7c2f | 268 | } |
309c32c9 MG |
269 | kmem_cache_destroy(cache); |
270 | } | |
34dc7c2f | 271 | |
309c32c9 MG |
272 | for (size_t i = 0; i < n; i++) { |
273 | kmem_cache_t *cache = zio_data_buf_cache[i]; | |
274 | if (cache == NULL) | |
275 | continue; | |
276 | for (size_t j = i; j < n; j++) { | |
277 | if (cache == zio_data_buf_cache[j]) | |
278 | zio_data_buf_cache[j] = NULL; | |
34dc7c2f | 279 | } |
309c32c9 MG |
280 | kmem_cache_destroy(cache); |
281 | } | |
282 | ||
283 | for (size_t i = 0; i < n; i++) { | |
284 | VERIFY3P(zio_buf_cache[i], ==, NULL); | |
285 | VERIFY3P(zio_data_buf_cache[i], ==, NULL); | |
34dc7c2f BB |
286 | } |
287 | ||
d164b209 | 288 | kmem_cache_destroy(zio_link_cache); |
34dc7c2f BB |
289 | kmem_cache_destroy(zio_cache); |
290 | ||
291 | zio_inject_fini(); | |
9759c60f ED |
292 | |
293 | lz4_fini(); | |
34dc7c2f BB |
294 | } |
295 | ||
296 | /* | |
297 | * ========================================================================== | |
298 | * Allocate and free I/O buffers | |
299 | * ========================================================================== | |
300 | */ | |
301 | ||
302 | /* | |
303 | * Use zio_buf_alloc to allocate ZFS metadata. This data will appear in a | |
304 | * crashdump if the kernel panics, so use it judiciously. Obviously, it's | |
305 | * useful to inspect ZFS metadata, but if possible, we should avoid keeping | |
306 | * excess / transient data in-core during a crashdump. | |
307 | */ | |
308 | void * | |
309 | zio_buf_alloc(size_t size) | |
310 | { | |
311 | size_t c = (size - 1) >> SPA_MINBLOCKSHIFT; | |
312 | ||
63e3a861 | 313 | VERIFY3U(c, <, SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT); |
a6255b7f DQ |
314 | #if defined(ZFS_DEBUG) && !defined(_KERNEL) |
315 | atomic_add_64(&zio_buf_cache_allocs[c], 1); | |
316 | #endif | |
34dc7c2f | 317 | |
efcd79a8 | 318 | return (kmem_cache_alloc(zio_buf_cache[c], KM_PUSHPAGE)); |
34dc7c2f BB |
319 | } |
320 | ||
321 | /* | |
322 | * Use zio_data_buf_alloc to allocate data. The data will not appear in a | |
323 | * crashdump if the kernel panics. This exists so that we will limit the amount | |
324 | * of ZFS data that shows up in a kernel crashdump. (Thus reducing the amount | |
325 | * of kernel heap dumped to disk when the kernel panics) | |
326 | */ | |
327 | void * | |
328 | zio_data_buf_alloc(size_t size) | |
329 | { | |
330 | size_t c = (size - 1) >> SPA_MINBLOCKSHIFT; | |
331 | ||
63e3a861 | 332 | VERIFY3U(c, <, SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT); |
34dc7c2f | 333 | |
efcd79a8 | 334 | return (kmem_cache_alloc(zio_data_buf_cache[c], KM_PUSHPAGE)); |
34dc7c2f BB |
335 | } |
336 | ||
337 | void | |
338 | zio_buf_free(void *buf, size_t size) | |
339 | { | |
340 | size_t c = (size - 1) >> SPA_MINBLOCKSHIFT; | |
341 | ||
63e3a861 | 342 | VERIFY3U(c, <, SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT); |
a6255b7f DQ |
343 | #if defined(ZFS_DEBUG) && !defined(_KERNEL) |
344 | atomic_add_64(&zio_buf_cache_frees[c], 1); | |
345 | #endif | |
34dc7c2f BB |
346 | |
347 | kmem_cache_free(zio_buf_cache[c], buf); | |
348 | } | |
349 | ||
350 | void | |
351 | zio_data_buf_free(void *buf, size_t size) | |
352 | { | |
353 | size_t c = (size - 1) >> SPA_MINBLOCKSHIFT; | |
354 | ||
63e3a861 | 355 | VERIFY3U(c, <, SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT); |
34dc7c2f BB |
356 | |
357 | kmem_cache_free(zio_data_buf_cache[c], buf); | |
358 | } | |
359 | ||
84c07ada GN |
360 | static void |
361 | zio_abd_free(void *abd, size_t size) | |
362 | { | |
14e4e3cb | 363 | (void) size; |
84c07ada GN |
364 | abd_free((abd_t *)abd); |
365 | } | |
366 | ||
34dc7c2f BB |
367 | /* |
368 | * ========================================================================== | |
369 | * Push and pop I/O transform buffers | |
370 | * ========================================================================== | |
371 | */ | |
d3c2ae1c | 372 | void |
a6255b7f | 373 | zio_push_transform(zio_t *zio, abd_t *data, uint64_t size, uint64_t bufsize, |
e9aa730c | 374 | zio_transform_func_t *transform) |
34dc7c2f | 375 | { |
79c76d5b | 376 | zio_transform_t *zt = kmem_alloc(sizeof (zio_transform_t), KM_SLEEP); |
34dc7c2f | 377 | |
a6255b7f | 378 | zt->zt_orig_abd = zio->io_abd; |
b128c09f | 379 | zt->zt_orig_size = zio->io_size; |
34dc7c2f | 380 | zt->zt_bufsize = bufsize; |
b128c09f | 381 | zt->zt_transform = transform; |
34dc7c2f BB |
382 | |
383 | zt->zt_next = zio->io_transform_stack; | |
384 | zio->io_transform_stack = zt; | |
385 | ||
a6255b7f | 386 | zio->io_abd = data; |
34dc7c2f BB |
387 | zio->io_size = size; |
388 | } | |
389 | ||
d3c2ae1c | 390 | void |
b128c09f | 391 | zio_pop_transforms(zio_t *zio) |
34dc7c2f | 392 | { |
b128c09f BB |
393 | zio_transform_t *zt; |
394 | ||
395 | while ((zt = zio->io_transform_stack) != NULL) { | |
396 | if (zt->zt_transform != NULL) | |
397 | zt->zt_transform(zio, | |
a6255b7f | 398 | zt->zt_orig_abd, zt->zt_orig_size); |
34dc7c2f | 399 | |
428870ff | 400 | if (zt->zt_bufsize != 0) |
a6255b7f | 401 | abd_free(zio->io_abd); |
34dc7c2f | 402 | |
a6255b7f | 403 | zio->io_abd = zt->zt_orig_abd; |
b128c09f BB |
404 | zio->io_size = zt->zt_orig_size; |
405 | zio->io_transform_stack = zt->zt_next; | |
34dc7c2f | 406 | |
b128c09f | 407 | kmem_free(zt, sizeof (zio_transform_t)); |
34dc7c2f BB |
408 | } |
409 | } | |
410 | ||
b128c09f BB |
411 | /* |
412 | * ========================================================================== | |
b5256303 | 413 | * I/O transform callbacks for subblocks, decompression, and decryption |
b128c09f BB |
414 | * ========================================================================== |
415 | */ | |
416 | static void | |
a6255b7f | 417 | zio_subblock(zio_t *zio, abd_t *data, uint64_t size) |
b128c09f BB |
418 | { |
419 | ASSERT(zio->io_size > size); | |
420 | ||
421 | if (zio->io_type == ZIO_TYPE_READ) | |
a6255b7f | 422 | abd_copy(data, zio->io_abd, size); |
b128c09f BB |
423 | } |
424 | ||
425 | static void | |
a6255b7f | 426 | zio_decompress(zio_t *zio, abd_t *data, uint64_t size) |
b128c09f | 427 | { |
a6255b7f DQ |
428 | if (zio->io_error == 0) { |
429 | void *tmp = abd_borrow_buf(data, size); | |
430 | int ret = zio_decompress_data(BP_GET_COMPRESS(zio->io_bp), | |
10b3c7f5 MN |
431 | zio->io_abd, tmp, zio->io_size, size, |
432 | &zio->io_prop.zp_complevel); | |
a6255b7f DQ |
433 | abd_return_buf_copy(data, tmp, size); |
434 | ||
c3bd3fb4 TC |
435 | if (zio_injection_enabled && ret == 0) |
436 | ret = zio_handle_fault_injection(zio, EINVAL); | |
437 | ||
a6255b7f DQ |
438 | if (ret != 0) |
439 | zio->io_error = SET_ERROR(EIO); | |
440 | } | |
b128c09f BB |
441 | } |
442 | ||
b5256303 TC |
443 | static void |
444 | zio_decrypt(zio_t *zio, abd_t *data, uint64_t size) | |
445 | { | |
446 | int ret; | |
447 | void *tmp; | |
448 | blkptr_t *bp = zio->io_bp; | |
ae76f45c TC |
449 | spa_t *spa = zio->io_spa; |
450 | uint64_t dsobj = zio->io_bookmark.zb_objset; | |
b5256303 TC |
451 | uint64_t lsize = BP_GET_LSIZE(bp); |
452 | dmu_object_type_t ot = BP_GET_TYPE(bp); | |
453 | uint8_t salt[ZIO_DATA_SALT_LEN]; | |
454 | uint8_t iv[ZIO_DATA_IV_LEN]; | |
455 | uint8_t mac[ZIO_DATA_MAC_LEN]; | |
456 | boolean_t no_crypt = B_FALSE; | |
457 | ||
458 | ASSERT(BP_USES_CRYPT(bp)); | |
459 | ASSERT3U(size, !=, 0); | |
460 | ||
461 | if (zio->io_error != 0) | |
462 | return; | |
463 | ||
464 | /* | |
465 | * Verify the cksum of MACs stored in an indirect bp. It will always | |
466 | * be possible to verify this since it does not require an encryption | |
467 | * key. | |
468 | */ | |
469 | if (BP_HAS_INDIRECT_MAC_CKSUM(bp)) { | |
470 | zio_crypt_decode_mac_bp(bp, mac); | |
471 | ||
472 | if (BP_GET_COMPRESS(bp) != ZIO_COMPRESS_OFF) { | |
473 | /* | |
474 | * We haven't decompressed the data yet, but | |
475 | * zio_crypt_do_indirect_mac_checksum() requires | |
476 | * decompressed data to be able to parse out the MACs | |
477 | * from the indirect block. We decompress it now and | |
478 | * throw away the result after we are finished. | |
479 | */ | |
480 | tmp = zio_buf_alloc(lsize); | |
481 | ret = zio_decompress_data(BP_GET_COMPRESS(bp), | |
10b3c7f5 MN |
482 | zio->io_abd, tmp, zio->io_size, lsize, |
483 | &zio->io_prop.zp_complevel); | |
b5256303 TC |
484 | if (ret != 0) { |
485 | ret = SET_ERROR(EIO); | |
486 | goto error; | |
487 | } | |
488 | ret = zio_crypt_do_indirect_mac_checksum(B_FALSE, | |
489 | tmp, lsize, BP_SHOULD_BYTESWAP(bp), mac); | |
490 | zio_buf_free(tmp, lsize); | |
491 | } else { | |
492 | ret = zio_crypt_do_indirect_mac_checksum_abd(B_FALSE, | |
493 | zio->io_abd, size, BP_SHOULD_BYTESWAP(bp), mac); | |
494 | } | |
495 | abd_copy(data, zio->io_abd, size); | |
496 | ||
be9a5c35 TC |
497 | if (zio_injection_enabled && ot != DMU_OT_DNODE && ret == 0) { |
498 | ret = zio_handle_decrypt_injection(spa, | |
499 | &zio->io_bookmark, ot, ECKSUM); | |
500 | } | |
b5256303 TC |
501 | if (ret != 0) |
502 | goto error; | |
503 | ||
504 | return; | |
505 | } | |
506 | ||
507 | /* | |
508 | * If this is an authenticated block, just check the MAC. It would be | |
509 | * nice to separate this out into its own flag, but for the moment | |
510 | * enum zio_flag is out of bits. | |
511 | */ | |
512 | if (BP_IS_AUTHENTICATED(bp)) { | |
513 | if (ot == DMU_OT_OBJSET) { | |
ae76f45c TC |
514 | ret = spa_do_crypt_objset_mac_abd(B_FALSE, spa, |
515 | dsobj, zio->io_abd, size, BP_SHOULD_BYTESWAP(bp)); | |
b5256303 TC |
516 | } else { |
517 | zio_crypt_decode_mac_bp(bp, mac); | |
ae76f45c TC |
518 | ret = spa_do_crypt_mac_abd(B_FALSE, spa, dsobj, |
519 | zio->io_abd, size, mac); | |
be9a5c35 TC |
520 | if (zio_injection_enabled && ret == 0) { |
521 | ret = zio_handle_decrypt_injection(spa, | |
522 | &zio->io_bookmark, ot, ECKSUM); | |
523 | } | |
b5256303 TC |
524 | } |
525 | abd_copy(data, zio->io_abd, size); | |
526 | ||
527 | if (ret != 0) | |
528 | goto error; | |
529 | ||
530 | return; | |
531 | } | |
532 | ||
533 | zio_crypt_decode_params_bp(bp, salt, iv); | |
534 | ||
535 | if (ot == DMU_OT_INTENT_LOG) { | |
536 | tmp = abd_borrow_buf_copy(zio->io_abd, sizeof (zil_chain_t)); | |
537 | zio_crypt_decode_mac_zil(tmp, mac); | |
538 | abd_return_buf(zio->io_abd, tmp, sizeof (zil_chain_t)); | |
539 | } else { | |
540 | zio_crypt_decode_mac_bp(bp, mac); | |
541 | } | |
542 | ||
be9a5c35 TC |
543 | ret = spa_do_crypt_abd(B_FALSE, spa, &zio->io_bookmark, BP_GET_TYPE(bp), |
544 | BP_GET_DEDUP(bp), BP_SHOULD_BYTESWAP(bp), salt, iv, mac, size, data, | |
545 | zio->io_abd, &no_crypt); | |
b5256303 TC |
546 | if (no_crypt) |
547 | abd_copy(data, zio->io_abd, size); | |
548 | ||
549 | if (ret != 0) | |
550 | goto error; | |
551 | ||
552 | return; | |
553 | ||
554 | error: | |
555 | /* assert that the key was found unless this was speculative */ | |
be9a5c35 | 556 | ASSERT(ret != EACCES || (zio->io_flags & ZIO_FLAG_SPECULATIVE)); |
b5256303 TC |
557 | |
558 | /* | |
559 | * If there was a decryption / authentication error return EIO as | |
560 | * the io_error. If this was not a speculative zio, create an ereport. | |
561 | */ | |
562 | if (ret == ECKSUM) { | |
a2c2ed1b | 563 | zio->io_error = SET_ERROR(EIO); |
b5256303 | 564 | if ((zio->io_flags & ZIO_FLAG_SPECULATIVE) == 0) { |
be9a5c35 | 565 | spa_log_error(spa, &zio->io_bookmark); |
1144586b | 566 | (void) zfs_ereport_post(FM_EREPORT_ZFS_AUTHENTICATION, |
4f072827 | 567 | spa, NULL, &zio->io_bookmark, zio, 0); |
b5256303 TC |
568 | } |
569 | } else { | |
570 | zio->io_error = ret; | |
571 | } | |
572 | } | |
573 | ||
b128c09f BB |
574 | /* |
575 | * ========================================================================== | |
576 | * I/O parent/child relationships and pipeline interlocks | |
577 | * ========================================================================== | |
578 | */ | |
d164b209 | 579 | zio_t * |
3dfb57a3 | 580 | zio_walk_parents(zio_t *cio, zio_link_t **zl) |
d164b209 | 581 | { |
d164b209 | 582 | list_t *pl = &cio->io_parent_list; |
b128c09f | 583 | |
3dfb57a3 DB |
584 | *zl = (*zl == NULL) ? list_head(pl) : list_next(pl, *zl); |
585 | if (*zl == NULL) | |
d164b209 BB |
586 | return (NULL); |
587 | ||
3dfb57a3 DB |
588 | ASSERT((*zl)->zl_child == cio); |
589 | return ((*zl)->zl_parent); | |
d164b209 BB |
590 | } |
591 | ||
592 | zio_t * | |
3dfb57a3 | 593 | zio_walk_children(zio_t *pio, zio_link_t **zl) |
d164b209 | 594 | { |
d164b209 BB |
595 | list_t *cl = &pio->io_child_list; |
596 | ||
a8b2e306 TC |
597 | ASSERT(MUTEX_HELD(&pio->io_lock)); |
598 | ||
3dfb57a3 DB |
599 | *zl = (*zl == NULL) ? list_head(cl) : list_next(cl, *zl); |
600 | if (*zl == NULL) | |
d164b209 BB |
601 | return (NULL); |
602 | ||
3dfb57a3 DB |
603 | ASSERT((*zl)->zl_parent == pio); |
604 | return ((*zl)->zl_child); | |
d164b209 BB |
605 | } |
606 | ||
607 | zio_t * | |
608 | zio_unique_parent(zio_t *cio) | |
609 | { | |
3dfb57a3 DB |
610 | zio_link_t *zl = NULL; |
611 | zio_t *pio = zio_walk_parents(cio, &zl); | |
d164b209 | 612 | |
3dfb57a3 | 613 | VERIFY3P(zio_walk_parents(cio, &zl), ==, NULL); |
d164b209 BB |
614 | return (pio); |
615 | } | |
616 | ||
617 | void | |
618 | zio_add_child(zio_t *pio, zio_t *cio) | |
b128c09f | 619 | { |
79c76d5b | 620 | zio_link_t *zl = kmem_cache_alloc(zio_link_cache, KM_SLEEP); |
d164b209 BB |
621 | |
622 | /* | |
623 | * Logical I/Os can have logical, gang, or vdev children. | |
624 | * Gang I/Os can have gang or vdev children. | |
625 | * Vdev I/Os can only have vdev children. | |
626 | * The following ASSERT captures all of these constraints. | |
627 | */ | |
1ce23dca | 628 | ASSERT3S(cio->io_child_type, <=, pio->io_child_type); |
d164b209 BB |
629 | |
630 | zl->zl_parent = pio; | |
631 | zl->zl_child = cio; | |
632 | ||
b128c09f | 633 | mutex_enter(&pio->io_lock); |
a8b2e306 | 634 | mutex_enter(&cio->io_lock); |
d164b209 BB |
635 | |
636 | ASSERT(pio->io_state[ZIO_WAIT_DONE] == 0); | |
637 | ||
1c27024e | 638 | for (int w = 0; w < ZIO_WAIT_TYPES; w++) |
d164b209 BB |
639 | pio->io_children[cio->io_child_type][w] += !cio->io_state[w]; |
640 | ||
641 | list_insert_head(&pio->io_child_list, zl); | |
642 | list_insert_head(&cio->io_parent_list, zl); | |
643 | ||
428870ff BB |
644 | pio->io_child_count++; |
645 | cio->io_parent_count++; | |
646 | ||
d164b209 | 647 | mutex_exit(&cio->io_lock); |
a8b2e306 | 648 | mutex_exit(&pio->io_lock); |
b128c09f BB |
649 | } |
650 | ||
34dc7c2f | 651 | static void |
d164b209 | 652 | zio_remove_child(zio_t *pio, zio_t *cio, zio_link_t *zl) |
b128c09f | 653 | { |
d164b209 BB |
654 | ASSERT(zl->zl_parent == pio); |
655 | ASSERT(zl->zl_child == cio); | |
b128c09f BB |
656 | |
657 | mutex_enter(&pio->io_lock); | |
a8b2e306 | 658 | mutex_enter(&cio->io_lock); |
d164b209 BB |
659 | |
660 | list_remove(&pio->io_child_list, zl); | |
661 | list_remove(&cio->io_parent_list, zl); | |
662 | ||
428870ff BB |
663 | pio->io_child_count--; |
664 | cio->io_parent_count--; | |
665 | ||
d164b209 | 666 | mutex_exit(&cio->io_lock); |
a8b2e306 | 667 | mutex_exit(&pio->io_lock); |
d164b209 | 668 | kmem_cache_free(zio_link_cache, zl); |
b128c09f BB |
669 | } |
670 | ||
671 | static boolean_t | |
ddc751d5 | 672 | zio_wait_for_children(zio_t *zio, uint8_t childbits, enum zio_wait_type wait) |
34dc7c2f | 673 | { |
b128c09f BB |
674 | boolean_t waiting = B_FALSE; |
675 | ||
676 | mutex_enter(&zio->io_lock); | |
677 | ASSERT(zio->io_stall == NULL); | |
ddc751d5 GW |
678 | for (int c = 0; c < ZIO_CHILD_TYPES; c++) { |
679 | if (!(ZIO_CHILD_BIT_IS_SET(childbits, c))) | |
680 | continue; | |
681 | ||
682 | uint64_t *countp = &zio->io_children[c][wait]; | |
683 | if (*countp != 0) { | |
684 | zio->io_stage >>= 1; | |
685 | ASSERT3U(zio->io_stage, !=, ZIO_STAGE_OPEN); | |
686 | zio->io_stall = countp; | |
687 | waiting = B_TRUE; | |
688 | break; | |
689 | } | |
b128c09f BB |
690 | } |
691 | mutex_exit(&zio->io_lock); | |
b128c09f BB |
692 | return (waiting); |
693 | } | |
34dc7c2f | 694 | |
bf701a83 BB |
695 | __attribute__((always_inline)) |
696 | static inline void | |
62840030 MA |
697 | zio_notify_parent(zio_t *pio, zio_t *zio, enum zio_wait_type wait, |
698 | zio_t **next_to_executep) | |
b128c09f BB |
699 | { |
700 | uint64_t *countp = &pio->io_children[zio->io_child_type][wait]; | |
701 | int *errorp = &pio->io_child_error[zio->io_child_type]; | |
34dc7c2f | 702 | |
b128c09f BB |
703 | mutex_enter(&pio->io_lock); |
704 | if (zio->io_error && !(zio->io_flags & ZIO_FLAG_DONT_PROPAGATE)) | |
705 | *errorp = zio_worst_error(*errorp, zio->io_error); | |
706 | pio->io_reexecute |= zio->io_reexecute; | |
707 | ASSERT3U(*countp, >, 0); | |
e8b96c60 MA |
708 | |
709 | (*countp)--; | |
710 | ||
711 | if (*countp == 0 && pio->io_stall == countp) { | |
3dfb57a3 DB |
712 | zio_taskq_type_t type = |
713 | pio->io_stage < ZIO_STAGE_VDEV_IO_START ? ZIO_TASKQ_ISSUE : | |
714 | ZIO_TASKQ_INTERRUPT; | |
b128c09f BB |
715 | pio->io_stall = NULL; |
716 | mutex_exit(&pio->io_lock); | |
62840030 | 717 | |
3dfb57a3 | 718 | /* |
62840030 MA |
719 | * If we can tell the caller to execute this parent next, do |
720 | * so. Otherwise dispatch the parent zio as its own task. | |
721 | * | |
722 | * Having the caller execute the parent when possible reduces | |
723 | * locking on the zio taskq's, reduces context switch | |
724 | * overhead, and has no recursion penalty. Note that one | |
725 | * read from disk typically causes at least 3 zio's: a | |
726 | * zio_null(), the logical zio_read(), and then a physical | |
727 | * zio. When the physical ZIO completes, we are able to call | |
728 | * zio_done() on all 3 of these zio's from one invocation of | |
729 | * zio_execute() by returning the parent back to | |
730 | * zio_execute(). Since the parent isn't executed until this | |
731 | * thread returns back to zio_execute(), the caller should do | |
732 | * so promptly. | |
733 | * | |
734 | * In other cases, dispatching the parent prevents | |
735 | * overflowing the stack when we have deeply nested | |
736 | * parent-child relationships, as we do with the "mega zio" | |
737 | * of writes for spa_sync(), and the chain of ZIL blocks. | |
3dfb57a3 | 738 | */ |
62840030 MA |
739 | if (next_to_executep != NULL && *next_to_executep == NULL) { |
740 | *next_to_executep = pio; | |
741 | } else { | |
742 | zio_taskq_dispatch(pio, type, B_FALSE); | |
743 | } | |
b128c09f BB |
744 | } else { |
745 | mutex_exit(&pio->io_lock); | |
34dc7c2f BB |
746 | } |
747 | } | |
748 | ||
b128c09f BB |
749 | static void |
750 | zio_inherit_child_errors(zio_t *zio, enum zio_child c) | |
751 | { | |
752 | if (zio->io_child_error[c] != 0 && zio->io_error == 0) | |
753 | zio->io_error = zio->io_child_error[c]; | |
754 | } | |
755 | ||
3dfb57a3 | 756 | int |
64fc7762 | 757 | zio_bookmark_compare(const void *x1, const void *x2) |
3dfb57a3 DB |
758 | { |
759 | const zio_t *z1 = x1; | |
760 | const zio_t *z2 = x2; | |
3dfb57a3 | 761 | |
64fc7762 MA |
762 | if (z1->io_bookmark.zb_objset < z2->io_bookmark.zb_objset) |
763 | return (-1); | |
764 | if (z1->io_bookmark.zb_objset > z2->io_bookmark.zb_objset) | |
765 | return (1); | |
3dfb57a3 | 766 | |
64fc7762 MA |
767 | if (z1->io_bookmark.zb_object < z2->io_bookmark.zb_object) |
768 | return (-1); | |
769 | if (z1->io_bookmark.zb_object > z2->io_bookmark.zb_object) | |
770 | return (1); | |
3dfb57a3 | 771 | |
64fc7762 MA |
772 | if (z1->io_bookmark.zb_level < z2->io_bookmark.zb_level) |
773 | return (-1); | |
774 | if (z1->io_bookmark.zb_level > z2->io_bookmark.zb_level) | |
775 | return (1); | |
776 | ||
777 | if (z1->io_bookmark.zb_blkid < z2->io_bookmark.zb_blkid) | |
778 | return (-1); | |
779 | if (z1->io_bookmark.zb_blkid > z2->io_bookmark.zb_blkid) | |
780 | return (1); | |
781 | ||
782 | if (z1 < z2) | |
783 | return (-1); | |
784 | if (z1 > z2) | |
785 | return (1); | |
786 | ||
787 | return (0); | |
3dfb57a3 DB |
788 | } |
789 | ||
34dc7c2f BB |
790 | /* |
791 | * ========================================================================== | |
b128c09f | 792 | * Create the various types of I/O (read, write, free, etc) |
34dc7c2f BB |
793 | * ========================================================================== |
794 | */ | |
795 | static zio_t * | |
428870ff | 796 | zio_create(zio_t *pio, spa_t *spa, uint64_t txg, const blkptr_t *bp, |
a6255b7f | 797 | abd_t *data, uint64_t lsize, uint64_t psize, zio_done_func_t *done, |
2aa34383 DK |
798 | void *private, zio_type_t type, zio_priority_t priority, |
799 | enum zio_flag flags, vdev_t *vd, uint64_t offset, | |
800 | const zbookmark_phys_t *zb, enum zio_stage stage, | |
801 | enum zio_stage pipeline) | |
34dc7c2f BB |
802 | { |
803 | zio_t *zio; | |
804 | ||
1b939560 | 805 | IMPLY(type != ZIO_TYPE_TRIM, psize <= SPA_MAXBLOCKSIZE); |
2aa34383 | 806 | ASSERT(P2PHASE(psize, SPA_MINBLOCKSIZE) == 0); |
b128c09f BB |
807 | ASSERT(P2PHASE(offset, SPA_MINBLOCKSIZE) == 0); |
808 | ||
809 | ASSERT(!vd || spa_config_held(spa, SCL_STATE_ALL, RW_READER)); | |
810 | ASSERT(!bp || !(flags & ZIO_FLAG_CONFIG_WRITER)); | |
811 | ASSERT(vd || stage == ZIO_STAGE_OPEN); | |
34dc7c2f | 812 | |
b5256303 | 813 | IMPLY(lsize != psize, (flags & ZIO_FLAG_RAW_COMPRESS) != 0); |
2aa34383 | 814 | |
79c76d5b | 815 | zio = kmem_cache_alloc(zio_cache, KM_SLEEP); |
861166b0 | 816 | memset(zio, 0, sizeof (zio_t)); |
3941503c | 817 | |
448d7aaa | 818 | mutex_init(&zio->io_lock, NULL, MUTEX_NOLOCKDEP, NULL); |
3941503c BB |
819 | cv_init(&zio->io_cv, NULL, CV_DEFAULT, NULL); |
820 | ||
821 | list_create(&zio->io_parent_list, sizeof (zio_link_t), | |
822 | offsetof(zio_link_t, zl_parent_node)); | |
823 | list_create(&zio->io_child_list, sizeof (zio_link_t), | |
824 | offsetof(zio_link_t, zl_child_node)); | |
4e21fd06 | 825 | metaslab_trace_init(&zio->io_alloc_list); |
d164b209 | 826 | |
b128c09f BB |
827 | if (vd != NULL) |
828 | zio->io_child_type = ZIO_CHILD_VDEV; | |
829 | else if (flags & ZIO_FLAG_GANG_CHILD) | |
830 | zio->io_child_type = ZIO_CHILD_GANG; | |
428870ff BB |
831 | else if (flags & ZIO_FLAG_DDT_CHILD) |
832 | zio->io_child_type = ZIO_CHILD_DDT; | |
b128c09f BB |
833 | else |
834 | zio->io_child_type = ZIO_CHILD_LOGICAL; | |
835 | ||
34dc7c2f | 836 | if (bp != NULL) { |
428870ff | 837 | zio->io_bp = (blkptr_t *)bp; |
34dc7c2f BB |
838 | zio->io_bp_copy = *bp; |
839 | zio->io_bp_orig = *bp; | |
428870ff BB |
840 | if (type != ZIO_TYPE_WRITE || |
841 | zio->io_child_type == ZIO_CHILD_DDT) | |
b128c09f | 842 | zio->io_bp = &zio->io_bp_copy; /* so caller can free */ |
9babb374 | 843 | if (zio->io_child_type == ZIO_CHILD_LOGICAL) |
b128c09f | 844 | zio->io_logical = zio; |
9babb374 BB |
845 | if (zio->io_child_type > ZIO_CHILD_GANG && BP_IS_GANG(bp)) |
846 | pipeline |= ZIO_GANG_STAGES; | |
34dc7c2f | 847 | } |
b128c09f BB |
848 | |
849 | zio->io_spa = spa; | |
850 | zio->io_txg = txg; | |
34dc7c2f BB |
851 | zio->io_done = done; |
852 | zio->io_private = private; | |
853 | zio->io_type = type; | |
854 | zio->io_priority = priority; | |
b128c09f BB |
855 | zio->io_vd = vd; |
856 | zio->io_offset = offset; | |
a6255b7f | 857 | zio->io_orig_abd = zio->io_abd = data; |
2aa34383 DK |
858 | zio->io_orig_size = zio->io_size = psize; |
859 | zio->io_lsize = lsize; | |
b128c09f BB |
860 | zio->io_orig_flags = zio->io_flags = flags; |
861 | zio->io_orig_stage = zio->io_stage = stage; | |
862 | zio->io_orig_pipeline = zio->io_pipeline = pipeline; | |
3dfb57a3 | 863 | zio->io_pipeline_trace = ZIO_STAGE_OPEN; |
34dc7c2f | 864 | |
d164b209 BB |
865 | zio->io_state[ZIO_WAIT_READY] = (stage >= ZIO_STAGE_READY); |
866 | zio->io_state[ZIO_WAIT_DONE] = (stage >= ZIO_STAGE_DONE); | |
867 | ||
b128c09f BB |
868 | if (zb != NULL) |
869 | zio->io_bookmark = *zb; | |
870 | ||
871 | if (pio != NULL) { | |
1b50749c | 872 | zio->io_metaslab_class = pio->io_metaslab_class; |
b128c09f | 873 | if (zio->io_logical == NULL) |
34dc7c2f | 874 | zio->io_logical = pio->io_logical; |
9babb374 BB |
875 | if (zio->io_child_type == ZIO_CHILD_GANG) |
876 | zio->io_gang_leader = pio->io_gang_leader; | |
b128c09f | 877 | zio_add_child(pio, zio); |
34dc7c2f BB |
878 | } |
879 | ||
a38718a6 GA |
880 | taskq_init_ent(&zio->io_tqent); |
881 | ||
34dc7c2f BB |
882 | return (zio); |
883 | } | |
884 | ||
885 | static void | |
b128c09f | 886 | zio_destroy(zio_t *zio) |
34dc7c2f | 887 | { |
4e21fd06 | 888 | metaslab_trace_fini(&zio->io_alloc_list); |
3941503c BB |
889 | list_destroy(&zio->io_parent_list); |
890 | list_destroy(&zio->io_child_list); | |
891 | mutex_destroy(&zio->io_lock); | |
892 | cv_destroy(&zio->io_cv); | |
b128c09f | 893 | kmem_cache_free(zio_cache, zio); |
34dc7c2f BB |
894 | } |
895 | ||
896 | zio_t * | |
d164b209 | 897 | zio_null(zio_t *pio, spa_t *spa, vdev_t *vd, zio_done_func_t *done, |
428870ff | 898 | void *private, enum zio_flag flags) |
34dc7c2f BB |
899 | { |
900 | zio_t *zio; | |
901 | ||
2aa34383 | 902 | zio = zio_create(pio, spa, 0, NULL, NULL, 0, 0, done, private, |
d164b209 | 903 | ZIO_TYPE_NULL, ZIO_PRIORITY_NOW, flags, vd, 0, NULL, |
b128c09f | 904 | ZIO_STAGE_OPEN, ZIO_INTERLOCK_PIPELINE); |
34dc7c2f BB |
905 | |
906 | return (zio); | |
907 | } | |
908 | ||
909 | zio_t * | |
428870ff | 910 | zio_root(spa_t *spa, zio_done_func_t *done, void *private, enum zio_flag flags) |
34dc7c2f | 911 | { |
d164b209 | 912 | return (zio_null(NULL, spa, NULL, done, private, flags)); |
34dc7c2f BB |
913 | } |
914 | ||
bc67cba7 PZ |
915 | static int |
916 | zfs_blkptr_verify_log(spa_t *spa, const blkptr_t *bp, | |
917 | enum blk_verify_flag blk_verify, const char *fmt, ...) | |
918 | { | |
919 | va_list adx; | |
920 | char buf[256]; | |
921 | ||
922 | va_start(adx, fmt); | |
923 | (void) vsnprintf(buf, sizeof (buf), fmt, adx); | |
924 | va_end(adx); | |
925 | ||
926 | switch (blk_verify) { | |
927 | case BLK_VERIFY_HALT: | |
f49db9b5 | 928 | dprintf_bp(bp, "blkptr at %p dprintf_bp():", bp); |
bc67cba7 PZ |
929 | zfs_panic_recover("%s: %s", spa_name(spa), buf); |
930 | break; | |
931 | case BLK_VERIFY_LOG: | |
932 | zfs_dbgmsg("%s: %s", spa_name(spa), buf); | |
933 | break; | |
934 | case BLK_VERIFY_ONLY: | |
935 | break; | |
936 | } | |
937 | ||
938 | return (1); | |
939 | } | |
940 | ||
941 | /* | |
942 | * Verify the block pointer fields contain reasonable values. This means | |
943 | * it only contains known object types, checksum/compression identifiers, | |
944 | * block sizes within the maximum allowed limits, valid DVAs, etc. | |
945 | * | |
946 | * If everything checks out B_TRUE is returned. The zfs_blkptr_verify | |
947 | * argument controls the behavior when an invalid field is detected. | |
948 | * | |
949 | * Modes for zfs_blkptr_verify: | |
950 | * 1) BLK_VERIFY_ONLY (evaluate the block) | |
951 | * 2) BLK_VERIFY_LOG (evaluate the block and log problems) | |
952 | * 3) BLK_VERIFY_HALT (call zfs_panic_recover on error) | |
953 | */ | |
954 | boolean_t | |
955 | zfs_blkptr_verify(spa_t *spa, const blkptr_t *bp, boolean_t config_held, | |
956 | enum blk_verify_flag blk_verify) | |
63e3a861 | 957 | { |
bc67cba7 PZ |
958 | int errors = 0; |
959 | ||
63e3a861 | 960 | if (!DMU_OT_IS_VALID(BP_GET_TYPE(bp))) { |
bc67cba7 PZ |
961 | errors += zfs_blkptr_verify_log(spa, bp, blk_verify, |
962 | "blkptr at %p has invalid TYPE %llu", | |
63e3a861 MA |
963 | bp, (longlong_t)BP_GET_TYPE(bp)); |
964 | } | |
2cd0f98f | 965 | if (BP_GET_CHECKSUM(bp) >= ZIO_CHECKSUM_FUNCTIONS) { |
bc67cba7 PZ |
966 | errors += zfs_blkptr_verify_log(spa, bp, blk_verify, |
967 | "blkptr at %p has invalid CHECKSUM %llu", | |
63e3a861 MA |
968 | bp, (longlong_t)BP_GET_CHECKSUM(bp)); |
969 | } | |
2cd0f98f | 970 | if (BP_GET_COMPRESS(bp) >= ZIO_COMPRESS_FUNCTIONS) { |
bc67cba7 PZ |
971 | errors += zfs_blkptr_verify_log(spa, bp, blk_verify, |
972 | "blkptr at %p has invalid COMPRESS %llu", | |
63e3a861 MA |
973 | bp, (longlong_t)BP_GET_COMPRESS(bp)); |
974 | } | |
975 | if (BP_GET_LSIZE(bp) > SPA_MAXBLOCKSIZE) { | |
bc67cba7 PZ |
976 | errors += zfs_blkptr_verify_log(spa, bp, blk_verify, |
977 | "blkptr at %p has invalid LSIZE %llu", | |
63e3a861 MA |
978 | bp, (longlong_t)BP_GET_LSIZE(bp)); |
979 | } | |
980 | if (BP_GET_PSIZE(bp) > SPA_MAXBLOCKSIZE) { | |
bc67cba7 PZ |
981 | errors += zfs_blkptr_verify_log(spa, bp, blk_verify, |
982 | "blkptr at %p has invalid PSIZE %llu", | |
63e3a861 MA |
983 | bp, (longlong_t)BP_GET_PSIZE(bp)); |
984 | } | |
985 | ||
986 | if (BP_IS_EMBEDDED(bp)) { | |
746d4a45 | 987 | if (BPE_GET_ETYPE(bp) >= NUM_BP_EMBEDDED_TYPES) { |
bc67cba7 PZ |
988 | errors += zfs_blkptr_verify_log(spa, bp, blk_verify, |
989 | "blkptr at %p has invalid ETYPE %llu", | |
63e3a861 MA |
990 | bp, (longlong_t)BPE_GET_ETYPE(bp)); |
991 | } | |
992 | } | |
993 | ||
6cb8e530 PZ |
994 | /* |
995 | * Do not verify individual DVAs if the config is not trusted. This | |
996 | * will be done once the zio is executed in vdev_mirror_map_alloc. | |
997 | */ | |
998 | if (!spa->spa_trust_config) | |
b9ec4a15 | 999 | return (errors == 0); |
6cb8e530 | 1000 | |
dc04a8c7 PD |
1001 | if (!config_held) |
1002 | spa_config_enter(spa, SCL_VDEV, bp, RW_READER); | |
1003 | else | |
1004 | ASSERT(spa_config_held(spa, SCL_VDEV, RW_WRITER)); | |
63e3a861 MA |
1005 | /* |
1006 | * Pool-specific checks. | |
1007 | * | |
1008 | * Note: it would be nice to verify that the blk_birth and | |
1009 | * BP_PHYSICAL_BIRTH() are not too large. However, spa_freeze() | |
1010 | * allows the birth time of log blocks (and dmu_sync()-ed blocks | |
1011 | * that are in the log) to be arbitrarily large. | |
1012 | */ | |
1c27024e | 1013 | for (int i = 0; i < BP_GET_NDVAS(bp); i++) { |
2b56a634 MA |
1014 | const dva_t *dva = &bp->blk_dva[i]; |
1015 | uint64_t vdevid = DVA_GET_VDEV(dva); | |
1c27024e | 1016 | |
63e3a861 | 1017 | if (vdevid >= spa->spa_root_vdev->vdev_children) { |
bc67cba7 PZ |
1018 | errors += zfs_blkptr_verify_log(spa, bp, blk_verify, |
1019 | "blkptr at %p DVA %u has invalid VDEV %llu", | |
63e3a861 | 1020 | bp, i, (longlong_t)vdevid); |
ee3a23b8 | 1021 | continue; |
63e3a861 | 1022 | } |
1c27024e | 1023 | vdev_t *vd = spa->spa_root_vdev->vdev_child[vdevid]; |
63e3a861 | 1024 | if (vd == NULL) { |
bc67cba7 PZ |
1025 | errors += zfs_blkptr_verify_log(spa, bp, blk_verify, |
1026 | "blkptr at %p DVA %u has invalid VDEV %llu", | |
63e3a861 | 1027 | bp, i, (longlong_t)vdevid); |
ee3a23b8 | 1028 | continue; |
63e3a861 MA |
1029 | } |
1030 | if (vd->vdev_ops == &vdev_hole_ops) { | |
bc67cba7 PZ |
1031 | errors += zfs_blkptr_verify_log(spa, bp, blk_verify, |
1032 | "blkptr at %p DVA %u has hole VDEV %llu", | |
63e3a861 | 1033 | bp, i, (longlong_t)vdevid); |
ee3a23b8 | 1034 | continue; |
63e3a861 MA |
1035 | } |
1036 | if (vd->vdev_ops == &vdev_missing_ops) { | |
1037 | /* | |
1038 | * "missing" vdevs are valid during import, but we | |
1039 | * don't have their detailed info (e.g. asize), so | |
1040 | * we can't perform any more checks on them. | |
1041 | */ | |
1042 | continue; | |
1043 | } | |
2b56a634 MA |
1044 | uint64_t offset = DVA_GET_OFFSET(dva); |
1045 | uint64_t asize = DVA_GET_ASIZE(dva); | |
1046 | if (DVA_GET_GANG(dva)) | |
1047 | asize = vdev_gang_header_asize(vd); | |
63e3a861 | 1048 | if (offset + asize > vd->vdev_asize) { |
bc67cba7 PZ |
1049 | errors += zfs_blkptr_verify_log(spa, bp, blk_verify, |
1050 | "blkptr at %p DVA %u has invalid OFFSET %llu", | |
63e3a861 MA |
1051 | bp, i, (longlong_t)offset); |
1052 | } | |
1053 | } | |
f49db9b5 BB |
1054 | if (errors > 0) |
1055 | dprintf_bp(bp, "blkptr at %p dprintf_bp():", bp); | |
dc04a8c7 PD |
1056 | if (!config_held) |
1057 | spa_config_exit(spa, SCL_VDEV, bp); | |
bc67cba7 PZ |
1058 | |
1059 | return (errors == 0); | |
63e3a861 MA |
1060 | } |
1061 | ||
6cb8e530 PZ |
1062 | boolean_t |
1063 | zfs_dva_valid(spa_t *spa, const dva_t *dva, const blkptr_t *bp) | |
1064 | { | |
14e4e3cb | 1065 | (void) bp; |
6cb8e530 PZ |
1066 | uint64_t vdevid = DVA_GET_VDEV(dva); |
1067 | ||
1068 | if (vdevid >= spa->spa_root_vdev->vdev_children) | |
1069 | return (B_FALSE); | |
1070 | ||
1071 | vdev_t *vd = spa->spa_root_vdev->vdev_child[vdevid]; | |
1072 | if (vd == NULL) | |
1073 | return (B_FALSE); | |
1074 | ||
1075 | if (vd->vdev_ops == &vdev_hole_ops) | |
1076 | return (B_FALSE); | |
1077 | ||
1078 | if (vd->vdev_ops == &vdev_missing_ops) { | |
1079 | return (B_FALSE); | |
1080 | } | |
1081 | ||
1082 | uint64_t offset = DVA_GET_OFFSET(dva); | |
1083 | uint64_t asize = DVA_GET_ASIZE(dva); | |
1084 | ||
2b56a634 MA |
1085 | if (DVA_GET_GANG(dva)) |
1086 | asize = vdev_gang_header_asize(vd); | |
6cb8e530 PZ |
1087 | if (offset + asize > vd->vdev_asize) |
1088 | return (B_FALSE); | |
1089 | ||
1090 | return (B_TRUE); | |
1091 | } | |
1092 | ||
34dc7c2f | 1093 | zio_t * |
b128c09f | 1094 | zio_read(zio_t *pio, spa_t *spa, const blkptr_t *bp, |
a6255b7f | 1095 | abd_t *data, uint64_t size, zio_done_func_t *done, void *private, |
5dbd68a3 | 1096 | zio_priority_t priority, enum zio_flag flags, const zbookmark_phys_t *zb) |
34dc7c2f BB |
1097 | { |
1098 | zio_t *zio; | |
1099 | ||
428870ff | 1100 | zio = zio_create(pio, spa, BP_PHYSICAL_BIRTH(bp), bp, |
2aa34383 | 1101 | data, size, size, done, private, |
b128c09f | 1102 | ZIO_TYPE_READ, priority, flags, NULL, 0, zb, |
428870ff BB |
1103 | ZIO_STAGE_OPEN, (flags & ZIO_FLAG_DDT_CHILD) ? |
1104 | ZIO_DDT_CHILD_READ_PIPELINE : ZIO_READ_PIPELINE); | |
34dc7c2f | 1105 | |
b128c09f BB |
1106 | return (zio); |
1107 | } | |
34dc7c2f | 1108 | |
34dc7c2f | 1109 | zio_t * |
b128c09f | 1110 | zio_write(zio_t *pio, spa_t *spa, uint64_t txg, blkptr_t *bp, |
a6255b7f | 1111 | abd_t *data, uint64_t lsize, uint64_t psize, const zio_prop_t *zp, |
bc77ba73 PD |
1112 | zio_done_func_t *ready, zio_done_func_t *children_ready, |
1113 | zio_done_func_t *physdone, zio_done_func_t *done, | |
1114 | void *private, zio_priority_t priority, enum zio_flag flags, | |
1115 | const zbookmark_phys_t *zb) | |
34dc7c2f BB |
1116 | { |
1117 | zio_t *zio; | |
1118 | ||
b128c09f BB |
1119 | ASSERT(zp->zp_checksum >= ZIO_CHECKSUM_OFF && |
1120 | zp->zp_checksum < ZIO_CHECKSUM_FUNCTIONS && | |
1121 | zp->zp_compress >= ZIO_COMPRESS_OFF && | |
1122 | zp->zp_compress < ZIO_COMPRESS_FUNCTIONS && | |
9ae529ec | 1123 | DMU_OT_IS_VALID(zp->zp_type) && |
b128c09f | 1124 | zp->zp_level < 32 && |
428870ff | 1125 | zp->zp_copies > 0 && |
03c6040b | 1126 | zp->zp_copies <= spa_max_replication(spa)); |
34dc7c2f | 1127 | |
2aa34383 | 1128 | zio = zio_create(pio, spa, txg, bp, data, lsize, psize, done, private, |
b128c09f | 1129 | ZIO_TYPE_WRITE, priority, flags, NULL, 0, zb, |
428870ff BB |
1130 | ZIO_STAGE_OPEN, (flags & ZIO_FLAG_DDT_CHILD) ? |
1131 | ZIO_DDT_CHILD_WRITE_PIPELINE : ZIO_WRITE_PIPELINE); | |
34dc7c2f BB |
1132 | |
1133 | zio->io_ready = ready; | |
bc77ba73 | 1134 | zio->io_children_ready = children_ready; |
e8b96c60 | 1135 | zio->io_physdone = physdone; |
b128c09f | 1136 | zio->io_prop = *zp; |
34dc7c2f | 1137 | |
9b67f605 MA |
1138 | /* |
1139 | * Data can be NULL if we are going to call zio_write_override() to | |
1140 | * provide the already-allocated BP. But we may need the data to | |
1141 | * verify a dedup hit (if requested). In this case, don't try to | |
b5256303 TC |
1142 | * dedup (just take the already-allocated BP verbatim). Encrypted |
1143 | * dedup blocks need data as well so we also disable dedup in this | |
1144 | * case. | |
9b67f605 | 1145 | */ |
b5256303 TC |
1146 | if (data == NULL && |
1147 | (zio->io_prop.zp_dedup_verify || zio->io_prop.zp_encrypt)) { | |
9b67f605 MA |
1148 | zio->io_prop.zp_dedup = zio->io_prop.zp_dedup_verify = B_FALSE; |
1149 | } | |
1150 | ||
34dc7c2f BB |
1151 | return (zio); |
1152 | } | |
1153 | ||
1154 | zio_t * | |
a6255b7f | 1155 | zio_rewrite(zio_t *pio, spa_t *spa, uint64_t txg, blkptr_t *bp, abd_t *data, |
e8b96c60 | 1156 | uint64_t size, zio_done_func_t *done, void *private, |
5dbd68a3 | 1157 | zio_priority_t priority, enum zio_flag flags, zbookmark_phys_t *zb) |
34dc7c2f BB |
1158 | { |
1159 | zio_t *zio; | |
1160 | ||
2aa34383 | 1161 | zio = zio_create(pio, spa, txg, bp, data, size, size, done, private, |
3dfb57a3 | 1162 | ZIO_TYPE_WRITE, priority, flags | ZIO_FLAG_IO_REWRITE, NULL, 0, zb, |
b128c09f | 1163 | ZIO_STAGE_OPEN, ZIO_REWRITE_PIPELINE); |
34dc7c2f BB |
1164 | |
1165 | return (zio); | |
1166 | } | |
1167 | ||
428870ff | 1168 | void |
03c6040b | 1169 | zio_write_override(zio_t *zio, blkptr_t *bp, int copies, boolean_t nopwrite) |
428870ff BB |
1170 | { |
1171 | ASSERT(zio->io_type == ZIO_TYPE_WRITE); | |
1172 | ASSERT(zio->io_child_type == ZIO_CHILD_LOGICAL); | |
1173 | ASSERT(zio->io_stage == ZIO_STAGE_OPEN); | |
1174 | ASSERT(zio->io_txg == spa_syncing_txg(zio->io_spa)); | |
1175 | ||
03c6040b GW |
1176 | /* |
1177 | * We must reset the io_prop to match the values that existed | |
1178 | * when the bp was first written by dmu_sync() keeping in mind | |
1179 | * that nopwrite and dedup are mutually exclusive. | |
1180 | */ | |
1181 | zio->io_prop.zp_dedup = nopwrite ? B_FALSE : zio->io_prop.zp_dedup; | |
1182 | zio->io_prop.zp_nopwrite = nopwrite; | |
428870ff BB |
1183 | zio->io_prop.zp_copies = copies; |
1184 | zio->io_bp_override = bp; | |
1185 | } | |
1186 | ||
1187 | void | |
1188 | zio_free(spa_t *spa, uint64_t txg, const blkptr_t *bp) | |
1189 | { | |
9b67f605 | 1190 | |
bc67cba7 | 1191 | (void) zfs_blkptr_verify(spa, bp, B_FALSE, BLK_VERIFY_HALT); |
a1d477c2 | 1192 | |
9b67f605 MA |
1193 | /* |
1194 | * The check for EMBEDDED is a performance optimization. We | |
1195 | * process the free here (by ignoring it) rather than | |
1196 | * putting it on the list and then processing it in zio_free_sync(). | |
1197 | */ | |
1198 | if (BP_IS_EMBEDDED(bp)) | |
1199 | return; | |
13fe0198 | 1200 | metaslab_check_free(spa, bp); |
2883cad5 MA |
1201 | |
1202 | /* | |
1203 | * Frees that are for the currently-syncing txg, are not going to be | |
1204 | * deferred, and which will not need to do a read (i.e. not GANG or | |
1205 | * DEDUP), can be processed immediately. Otherwise, put them on the | |
1206 | * in-memory list for later processing. | |
93e28d66 SD |
1207 | * |
1208 | * Note that we only defer frees after zfs_sync_pass_deferred_free | |
1209 | * when the log space map feature is disabled. [see relevant comment | |
1210 | * in spa_sync_iterate_to_convergence()] | |
2883cad5 | 1211 | */ |
93e28d66 SD |
1212 | if (BP_IS_GANG(bp) || |
1213 | BP_GET_DEDUP(bp) || | |
2883cad5 | 1214 | txg != spa->spa_syncing_txg || |
93e28d66 SD |
1215 | (spa_sync_pass(spa) >= zfs_sync_pass_deferred_free && |
1216 | !spa_feature_is_active(spa, SPA_FEATURE_LOG_SPACEMAP))) { | |
2883cad5 MA |
1217 | bplist_append(&spa->spa_free_bplist[txg & TXG_MASK], bp); |
1218 | } else { | |
9cdf7b1f | 1219 | VERIFY3P(zio_free_sync(NULL, spa, txg, bp, 0), ==, NULL); |
2883cad5 | 1220 | } |
428870ff BB |
1221 | } |
1222 | ||
9cdf7b1f MA |
1223 | /* |
1224 | * To improve performance, this function may return NULL if we were able | |
1225 | * to do the free immediately. This avoids the cost of creating a zio | |
1226 | * (and linking it to the parent, etc). | |
1227 | */ | |
34dc7c2f | 1228 | zio_t * |
428870ff BB |
1229 | zio_free_sync(zio_t *pio, spa_t *spa, uint64_t txg, const blkptr_t *bp, |
1230 | enum zio_flag flags) | |
34dc7c2f | 1231 | { |
428870ff BB |
1232 | ASSERT(!BP_IS_HOLE(bp)); |
1233 | ASSERT(spa_syncing_txg(spa) == txg); | |
34dc7c2f | 1234 | |
9b67f605 | 1235 | if (BP_IS_EMBEDDED(bp)) |
9cdf7b1f | 1236 | return (NULL); |
9b67f605 | 1237 | |
13fe0198 | 1238 | metaslab_check_free(spa, bp); |
8c841793 | 1239 | arc_freed(spa, bp); |
d4a72f23 | 1240 | dsl_scan_freed(spa, bp); |
13fe0198 | 1241 | |
9cdf7b1f MA |
1242 | if (BP_IS_GANG(bp) || BP_GET_DEDUP(bp)) { |
1243 | /* | |
1244 | * GANG and DEDUP blocks can induce a read (for the gang block | |
1245 | * header, or the DDT), so issue them asynchronously so that | |
1246 | * this thread is not tied up. | |
1247 | */ | |
1248 | enum zio_stage stage = | |
1249 | ZIO_FREE_PIPELINE | ZIO_STAGE_ISSUE_ASYNC; | |
2883cad5 | 1250 | |
9cdf7b1f MA |
1251 | return (zio_create(pio, spa, txg, bp, NULL, BP_GET_PSIZE(bp), |
1252 | BP_GET_PSIZE(bp), NULL, NULL, | |
1253 | ZIO_TYPE_FREE, ZIO_PRIORITY_NOW, | |
1254 | flags, NULL, 0, NULL, ZIO_STAGE_OPEN, stage)); | |
1255 | } else { | |
1256 | metaslab_free(spa, bp, txg, B_FALSE); | |
1257 | return (NULL); | |
1258 | } | |
34dc7c2f BB |
1259 | } |
1260 | ||
1261 | zio_t * | |
428870ff BB |
1262 | zio_claim(zio_t *pio, spa_t *spa, uint64_t txg, const blkptr_t *bp, |
1263 | zio_done_func_t *done, void *private, enum zio_flag flags) | |
34dc7c2f BB |
1264 | { |
1265 | zio_t *zio; | |
1266 | ||
bc67cba7 PZ |
1267 | (void) zfs_blkptr_verify(spa, bp, flags & ZIO_FLAG_CONFIG_WRITER, |
1268 | BLK_VERIFY_HALT); | |
9b67f605 MA |
1269 | |
1270 | if (BP_IS_EMBEDDED(bp)) | |
1271 | return (zio_null(pio, spa, NULL, NULL, NULL, 0)); | |
1272 | ||
34dc7c2f BB |
1273 | /* |
1274 | * A claim is an allocation of a specific block. Claims are needed | |
1275 | * to support immediate writes in the intent log. The issue is that | |
1276 | * immediate writes contain committed data, but in a txg that was | |
1277 | * *not* committed. Upon opening the pool after an unclean shutdown, | |
1278 | * the intent log claims all blocks that contain immediate write data | |
1279 | * so that the SPA knows they're in use. | |
1280 | * | |
1281 | * All claims *must* be resolved in the first txg -- before the SPA | |
1282 | * starts allocating blocks -- so that nothing is allocated twice. | |
428870ff | 1283 | * If txg == 0 we just verify that the block is claimable. |
34dc7c2f | 1284 | */ |
d2734cce SD |
1285 | ASSERT3U(spa->spa_uberblock.ub_rootbp.blk_birth, <, |
1286 | spa_min_claim_txg(spa)); | |
1287 | ASSERT(txg == spa_min_claim_txg(spa) || txg == 0); | |
76d04993 | 1288 | ASSERT(!BP_GET_DEDUP(bp) || !spa_writeable(spa)); /* zdb(8) */ |
34dc7c2f | 1289 | |
b128c09f | 1290 | zio = zio_create(pio, spa, txg, bp, NULL, BP_GET_PSIZE(bp), |
2aa34383 DK |
1291 | BP_GET_PSIZE(bp), done, private, ZIO_TYPE_CLAIM, ZIO_PRIORITY_NOW, |
1292 | flags, NULL, 0, NULL, ZIO_STAGE_OPEN, ZIO_CLAIM_PIPELINE); | |
3dfb57a3 | 1293 | ASSERT0(zio->io_queued_timestamp); |
34dc7c2f BB |
1294 | |
1295 | return (zio); | |
1296 | } | |
1297 | ||
1298 | zio_t * | |
1299 | zio_ioctl(zio_t *pio, spa_t *spa, vdev_t *vd, int cmd, | |
e8b96c60 | 1300 | zio_done_func_t *done, void *private, enum zio_flag flags) |
34dc7c2f BB |
1301 | { |
1302 | zio_t *zio; | |
1303 | int c; | |
1304 | ||
1305 | if (vd->vdev_children == 0) { | |
2aa34383 | 1306 | zio = zio_create(pio, spa, 0, NULL, NULL, 0, 0, done, private, |
e8b96c60 | 1307 | ZIO_TYPE_IOCTL, ZIO_PRIORITY_NOW, flags, vd, 0, NULL, |
34dc7c2f BB |
1308 | ZIO_STAGE_OPEN, ZIO_IOCTL_PIPELINE); |
1309 | ||
34dc7c2f BB |
1310 | zio->io_cmd = cmd; |
1311 | } else { | |
d164b209 | 1312 | zio = zio_null(pio, spa, NULL, NULL, NULL, flags); |
34dc7c2f BB |
1313 | |
1314 | for (c = 0; c < vd->vdev_children; c++) | |
1315 | zio_nowait(zio_ioctl(zio, spa, vd->vdev_child[c], cmd, | |
e8b96c60 | 1316 | done, private, flags)); |
34dc7c2f BB |
1317 | } |
1318 | ||
1319 | return (zio); | |
1320 | } | |
1321 | ||
1b939560 BB |
1322 | zio_t * |
1323 | zio_trim(zio_t *pio, vdev_t *vd, uint64_t offset, uint64_t size, | |
1324 | zio_done_func_t *done, void *private, zio_priority_t priority, | |
1325 | enum zio_flag flags, enum trim_flag trim_flags) | |
1326 | { | |
1327 | zio_t *zio; | |
1328 | ||
1329 | ASSERT0(vd->vdev_children); | |
1330 | ASSERT0(P2PHASE(offset, 1ULL << vd->vdev_ashift)); | |
1331 | ASSERT0(P2PHASE(size, 1ULL << vd->vdev_ashift)); | |
1332 | ASSERT3U(size, !=, 0); | |
1333 | ||
1334 | zio = zio_create(pio, vd->vdev_spa, 0, NULL, NULL, size, size, done, | |
1335 | private, ZIO_TYPE_TRIM, priority, flags | ZIO_FLAG_PHYSICAL, | |
1336 | vd, offset, NULL, ZIO_STAGE_OPEN, ZIO_TRIM_PIPELINE); | |
1337 | zio->io_trim_flags = trim_flags; | |
1338 | ||
1339 | return (zio); | |
1340 | } | |
1341 | ||
34dc7c2f BB |
1342 | zio_t * |
1343 | zio_read_phys(zio_t *pio, vdev_t *vd, uint64_t offset, uint64_t size, | |
a6255b7f | 1344 | abd_t *data, int checksum, zio_done_func_t *done, void *private, |
e8b96c60 | 1345 | zio_priority_t priority, enum zio_flag flags, boolean_t labels) |
34dc7c2f BB |
1346 | { |
1347 | zio_t *zio; | |
34dc7c2f | 1348 | |
b128c09f BB |
1349 | ASSERT(vd->vdev_children == 0); |
1350 | ASSERT(!labels || offset + size <= VDEV_LABEL_START_SIZE || | |
1351 | offset >= vd->vdev_psize - VDEV_LABEL_END_SIZE); | |
1352 | ASSERT3U(offset + size, <=, vd->vdev_psize); | |
34dc7c2f | 1353 | |
2aa34383 DK |
1354 | zio = zio_create(pio, vd->vdev_spa, 0, NULL, data, size, size, done, |
1355 | private, ZIO_TYPE_READ, priority, flags | ZIO_FLAG_PHYSICAL, vd, | |
1356 | offset, NULL, ZIO_STAGE_OPEN, ZIO_READ_PHYS_PIPELINE); | |
34dc7c2f | 1357 | |
b128c09f | 1358 | zio->io_prop.zp_checksum = checksum; |
34dc7c2f BB |
1359 | |
1360 | return (zio); | |
1361 | } | |
1362 | ||
1363 | zio_t * | |
1364 | zio_write_phys(zio_t *pio, vdev_t *vd, uint64_t offset, uint64_t size, | |
a6255b7f | 1365 | abd_t *data, int checksum, zio_done_func_t *done, void *private, |
e8b96c60 | 1366 | zio_priority_t priority, enum zio_flag flags, boolean_t labels) |
34dc7c2f | 1367 | { |
34dc7c2f | 1368 | zio_t *zio; |
34dc7c2f | 1369 | |
b128c09f BB |
1370 | ASSERT(vd->vdev_children == 0); |
1371 | ASSERT(!labels || offset + size <= VDEV_LABEL_START_SIZE || | |
1372 | offset >= vd->vdev_psize - VDEV_LABEL_END_SIZE); | |
1373 | ASSERT3U(offset + size, <=, vd->vdev_psize); | |
34dc7c2f | 1374 | |
2aa34383 DK |
1375 | zio = zio_create(pio, vd->vdev_spa, 0, NULL, data, size, size, done, |
1376 | private, ZIO_TYPE_WRITE, priority, flags | ZIO_FLAG_PHYSICAL, vd, | |
1377 | offset, NULL, ZIO_STAGE_OPEN, ZIO_WRITE_PHYS_PIPELINE); | |
34dc7c2f | 1378 | |
b128c09f | 1379 | zio->io_prop.zp_checksum = checksum; |
34dc7c2f | 1380 | |
3c67d83a | 1381 | if (zio_checksum_table[checksum].ci_flags & ZCHECKSUM_FLAG_EMBEDDED) { |
34dc7c2f | 1382 | /* |
428870ff | 1383 | * zec checksums are necessarily destructive -- they modify |
b128c09f | 1384 | * the end of the write buffer to hold the verifier/checksum. |
34dc7c2f | 1385 | * Therefore, we must make a local copy in case the data is |
b128c09f | 1386 | * being written to multiple places in parallel. |
34dc7c2f | 1387 | */ |
a6255b7f DQ |
1388 | abd_t *wbuf = abd_alloc_sametype(data, size); |
1389 | abd_copy(wbuf, data, size); | |
1390 | ||
b128c09f | 1391 | zio_push_transform(zio, wbuf, size, size, NULL); |
34dc7c2f BB |
1392 | } |
1393 | ||
1394 | return (zio); | |
1395 | } | |
1396 | ||
1397 | /* | |
b128c09f | 1398 | * Create a child I/O to do some work for us. |
34dc7c2f BB |
1399 | */ |
1400 | zio_t * | |
b128c09f | 1401 | zio_vdev_child_io(zio_t *pio, blkptr_t *bp, vdev_t *vd, uint64_t offset, |
4ea3f864 GM |
1402 | abd_t *data, uint64_t size, int type, zio_priority_t priority, |
1403 | enum zio_flag flags, zio_done_func_t *done, void *private) | |
34dc7c2f | 1404 | { |
428870ff | 1405 | enum zio_stage pipeline = ZIO_VDEV_CHILD_PIPELINE; |
b128c09f BB |
1406 | zio_t *zio; |
1407 | ||
a1d477c2 MA |
1408 | /* |
1409 | * vdev child I/Os do not propagate their error to the parent. | |
1410 | * Therefore, for correct operation the caller *must* check for | |
1411 | * and handle the error in the child i/o's done callback. | |
1412 | * The only exceptions are i/os that we don't care about | |
1413 | * (OPTIONAL or REPAIR). | |
1414 | */ | |
1415 | ASSERT((flags & ZIO_FLAG_OPTIONAL) || (flags & ZIO_FLAG_IO_REPAIR) || | |
1416 | done != NULL); | |
1417 | ||
34dc7c2f BB |
1418 | if (type == ZIO_TYPE_READ && bp != NULL) { |
1419 | /* | |
1420 | * If we have the bp, then the child should perform the | |
1421 | * checksum and the parent need not. This pushes error | |
1422 | * detection as close to the leaves as possible and | |
1423 | * eliminates redundant checksums in the interior nodes. | |
1424 | */ | |
428870ff BB |
1425 | pipeline |= ZIO_STAGE_CHECKSUM_VERIFY; |
1426 | pio->io_pipeline &= ~ZIO_STAGE_CHECKSUM_VERIFY; | |
34dc7c2f BB |
1427 | } |
1428 | ||
a1d477c2 MA |
1429 | if (vd->vdev_ops->vdev_op_leaf) { |
1430 | ASSERT0(vd->vdev_children); | |
b128c09f | 1431 | offset += VDEV_LABEL_START_SIZE; |
a1d477c2 | 1432 | } |
b128c09f | 1433 | |
a1d477c2 | 1434 | flags |= ZIO_VDEV_CHILD_FLAGS(pio); |
428870ff BB |
1435 | |
1436 | /* | |
1437 | * If we've decided to do a repair, the write is not speculative -- | |
1438 | * even if the original read was. | |
1439 | */ | |
1440 | if (flags & ZIO_FLAG_IO_REPAIR) | |
1441 | flags &= ~ZIO_FLAG_SPECULATIVE; | |
1442 | ||
3dfb57a3 DB |
1443 | /* |
1444 | * If we're creating a child I/O that is not associated with a | |
1445 | * top-level vdev, then the child zio is not an allocating I/O. | |
1446 | * If this is a retried I/O then we ignore it since we will | |
1447 | * have already processed the original allocating I/O. | |
1448 | */ | |
1449 | if (flags & ZIO_FLAG_IO_ALLOCATING && | |
1450 | (vd != vd->vdev_top || (flags & ZIO_FLAG_IO_RETRY))) { | |
cc99f275 DB |
1451 | ASSERT(pio->io_metaslab_class != NULL); |
1452 | ASSERT(pio->io_metaslab_class->mc_alloc_throttle_enabled); | |
3dfb57a3 DB |
1453 | ASSERT(type == ZIO_TYPE_WRITE); |
1454 | ASSERT(priority == ZIO_PRIORITY_ASYNC_WRITE); | |
1455 | ASSERT(!(flags & ZIO_FLAG_IO_REPAIR)); | |
1456 | ASSERT(!(pio->io_flags & ZIO_FLAG_IO_REWRITE) || | |
1457 | pio->io_child_type == ZIO_CHILD_GANG); | |
1458 | ||
1459 | flags &= ~ZIO_FLAG_IO_ALLOCATING; | |
1460 | } | |
1461 | ||
1462 | ||
2aa34383 | 1463 | zio = zio_create(pio, pio->io_spa, pio->io_txg, bp, data, size, size, |
428870ff BB |
1464 | done, private, type, priority, flags, vd, offset, &pio->io_bookmark, |
1465 | ZIO_STAGE_VDEV_IO_START >> 1, pipeline); | |
3dfb57a3 | 1466 | ASSERT3U(zio->io_child_type, ==, ZIO_CHILD_VDEV); |
34dc7c2f | 1467 | |
e8b96c60 MA |
1468 | zio->io_physdone = pio->io_physdone; |
1469 | if (vd->vdev_ops->vdev_op_leaf && zio->io_logical != NULL) | |
1470 | zio->io_logical->io_phys_children++; | |
1471 | ||
b128c09f | 1472 | return (zio); |
34dc7c2f BB |
1473 | } |
1474 | ||
b128c09f | 1475 | zio_t * |
a6255b7f | 1476 | zio_vdev_delegated_io(vdev_t *vd, uint64_t offset, abd_t *data, uint64_t size, |
9e052db4 | 1477 | zio_type_t type, zio_priority_t priority, enum zio_flag flags, |
e9aa730c | 1478 | zio_done_func_t *done, void *private) |
34dc7c2f | 1479 | { |
b128c09f | 1480 | zio_t *zio; |
34dc7c2f | 1481 | |
b128c09f | 1482 | ASSERT(vd->vdev_ops->vdev_op_leaf); |
34dc7c2f | 1483 | |
b128c09f | 1484 | zio = zio_create(NULL, vd->vdev_spa, 0, NULL, |
2aa34383 | 1485 | data, size, size, done, private, type, priority, |
e8b96c60 | 1486 | flags | ZIO_FLAG_CANFAIL | ZIO_FLAG_DONT_RETRY | ZIO_FLAG_DELEGATED, |
b128c09f | 1487 | vd, offset, NULL, |
428870ff | 1488 | ZIO_STAGE_VDEV_IO_START >> 1, ZIO_VDEV_CHILD_PIPELINE); |
34dc7c2f | 1489 | |
b128c09f | 1490 | return (zio); |
34dc7c2f BB |
1491 | } |
1492 | ||
1493 | void | |
b128c09f | 1494 | zio_flush(zio_t *zio, vdev_t *vd) |
34dc7c2f | 1495 | { |
b128c09f | 1496 | zio_nowait(zio_ioctl(zio, zio->io_spa, vd, DKIOCFLUSHWRITECACHE, |
e8b96c60 | 1497 | NULL, NULL, |
b128c09f | 1498 | ZIO_FLAG_CANFAIL | ZIO_FLAG_DONT_PROPAGATE | ZIO_FLAG_DONT_RETRY)); |
34dc7c2f BB |
1499 | } |
1500 | ||
428870ff BB |
1501 | void |
1502 | zio_shrink(zio_t *zio, uint64_t size) | |
1503 | { | |
1ce23dca PS |
1504 | ASSERT3P(zio->io_executor, ==, NULL); |
1505 | ASSERT3U(zio->io_orig_size, ==, zio->io_size); | |
1506 | ASSERT3U(size, <=, zio->io_size); | |
428870ff BB |
1507 | |
1508 | /* | |
1509 | * We don't shrink for raidz because of problems with the | |
1510 | * reconstruction when reading back less than the block size. | |
1511 | * Note, BP_IS_RAIDZ() assumes no compression. | |
1512 | */ | |
1513 | ASSERT(BP_GET_COMPRESS(zio->io_bp) == ZIO_COMPRESS_OFF); | |
2aa34383 DK |
1514 | if (!BP_IS_RAIDZ(zio->io_bp)) { |
1515 | /* we are not doing a raw write */ | |
1516 | ASSERT3U(zio->io_size, ==, zio->io_lsize); | |
1517 | zio->io_orig_size = zio->io_size = zio->io_lsize = size; | |
1518 | } | |
428870ff BB |
1519 | } |
1520 | ||
34dc7c2f BB |
1521 | /* |
1522 | * ========================================================================== | |
b128c09f | 1523 | * Prepare to read and write logical blocks |
34dc7c2f BB |
1524 | * ========================================================================== |
1525 | */ | |
b128c09f | 1526 | |
62840030 | 1527 | static zio_t * |
b128c09f | 1528 | zio_read_bp_init(zio_t *zio) |
34dc7c2f | 1529 | { |
b128c09f | 1530 | blkptr_t *bp = zio->io_bp; |
b5256303 TC |
1531 | uint64_t psize = |
1532 | BP_IS_EMBEDDED(bp) ? BPE_GET_PSIZE(bp) : BP_GET_PSIZE(bp); | |
34dc7c2f | 1533 | |
a1d477c2 MA |
1534 | ASSERT3P(zio->io_bp, ==, &zio->io_bp_copy); |
1535 | ||
fb5f0bc8 | 1536 | if (BP_GET_COMPRESS(bp) != ZIO_COMPRESS_OFF && |
9babb374 | 1537 | zio->io_child_type == ZIO_CHILD_LOGICAL && |
b5256303 | 1538 | !(zio->io_flags & ZIO_FLAG_RAW_COMPRESS)) { |
a6255b7f DQ |
1539 | zio_push_transform(zio, abd_alloc_sametype(zio->io_abd, psize), |
1540 | psize, psize, zio_decompress); | |
34dc7c2f | 1541 | } |
34dc7c2f | 1542 | |
b5256303 TC |
1543 | if (((BP_IS_PROTECTED(bp) && !(zio->io_flags & ZIO_FLAG_RAW_ENCRYPT)) || |
1544 | BP_HAS_INDIRECT_MAC_CKSUM(bp)) && | |
1545 | zio->io_child_type == ZIO_CHILD_LOGICAL) { | |
1546 | zio_push_transform(zio, abd_alloc_sametype(zio->io_abd, psize), | |
1547 | psize, psize, zio_decrypt); | |
1548 | } | |
1549 | ||
9b67f605 | 1550 | if (BP_IS_EMBEDDED(bp) && BPE_GET_ETYPE(bp) == BP_EMBEDDED_TYPE_DATA) { |
a6255b7f DQ |
1551 | int psize = BPE_GET_PSIZE(bp); |
1552 | void *data = abd_borrow_buf(zio->io_abd, psize); | |
1553 | ||
9b67f605 | 1554 | zio->io_pipeline = ZIO_INTERLOCK_PIPELINE; |
a6255b7f DQ |
1555 | decode_embedded_bp_compressed(bp, data); |
1556 | abd_return_buf_copy(zio->io_abd, data, psize); | |
9b67f605 MA |
1557 | } else { |
1558 | ASSERT(!BP_IS_EMBEDDED(bp)); | |
a1d477c2 | 1559 | ASSERT3P(zio->io_bp, ==, &zio->io_bp_copy); |
9b67f605 MA |
1560 | } |
1561 | ||
9ae529ec | 1562 | if (!DMU_OT_IS_METADATA(BP_GET_TYPE(bp)) && BP_GET_LEVEL(bp) == 0) |
b128c09f BB |
1563 | zio->io_flags |= ZIO_FLAG_DONT_CACHE; |
1564 | ||
428870ff BB |
1565 | if (BP_GET_TYPE(bp) == DMU_OT_DDT_ZAP) |
1566 | zio->io_flags |= ZIO_FLAG_DONT_CACHE; | |
1567 | ||
1568 | if (BP_GET_DEDUP(bp) && zio->io_child_type == ZIO_CHILD_LOGICAL) | |
1569 | zio->io_pipeline = ZIO_DDT_READ_PIPELINE; | |
1570 | ||
62840030 | 1571 | return (zio); |
34dc7c2f BB |
1572 | } |
1573 | ||
62840030 | 1574 | static zio_t * |
b128c09f | 1575 | zio_write_bp_init(zio_t *zio) |
34dc7c2f | 1576 | { |
b128c09f | 1577 | if (!IO_IS_ALLOCATING(zio)) |
62840030 | 1578 | return (zio); |
34dc7c2f | 1579 | |
428870ff BB |
1580 | ASSERT(zio->io_child_type != ZIO_CHILD_DDT); |
1581 | ||
1582 | if (zio->io_bp_override) { | |
3dfb57a3 DB |
1583 | blkptr_t *bp = zio->io_bp; |
1584 | zio_prop_t *zp = &zio->io_prop; | |
1585 | ||
428870ff BB |
1586 | ASSERT(bp->blk_birth != zio->io_txg); |
1587 | ASSERT(BP_GET_DEDUP(zio->io_bp_override) == 0); | |
1588 | ||
1589 | *bp = *zio->io_bp_override; | |
1590 | zio->io_pipeline = ZIO_INTERLOCK_PIPELINE; | |
1591 | ||
9b67f605 | 1592 | if (BP_IS_EMBEDDED(bp)) |
62840030 | 1593 | return (zio); |
9b67f605 | 1594 | |
03c6040b GW |
1595 | /* |
1596 | * If we've been overridden and nopwrite is set then | |
1597 | * set the flag accordingly to indicate that a nopwrite | |
1598 | * has already occurred. | |
1599 | */ | |
1600 | if (!BP_IS_HOLE(bp) && zp->zp_nopwrite) { | |
1601 | ASSERT(!zp->zp_dedup); | |
3dfb57a3 | 1602 | ASSERT3U(BP_GET_CHECKSUM(bp), ==, zp->zp_checksum); |
03c6040b | 1603 | zio->io_flags |= ZIO_FLAG_NOPWRITE; |
62840030 | 1604 | return (zio); |
03c6040b GW |
1605 | } |
1606 | ||
1607 | ASSERT(!zp->zp_nopwrite); | |
1608 | ||
428870ff | 1609 | if (BP_IS_HOLE(bp) || !zp->zp_dedup) |
62840030 | 1610 | return (zio); |
428870ff | 1611 | |
3c67d83a TH |
1612 | ASSERT((zio_checksum_table[zp->zp_checksum].ci_flags & |
1613 | ZCHECKSUM_FLAG_DEDUP) || zp->zp_dedup_verify); | |
428870ff | 1614 | |
b5256303 TC |
1615 | if (BP_GET_CHECKSUM(bp) == zp->zp_checksum && |
1616 | !zp->zp_encrypt) { | |
428870ff BB |
1617 | BP_SET_DEDUP(bp, 1); |
1618 | zio->io_pipeline |= ZIO_STAGE_DDT_WRITE; | |
62840030 | 1619 | return (zio); |
428870ff | 1620 | } |
3dfb57a3 DB |
1621 | |
1622 | /* | |
1623 | * We were unable to handle this as an override bp, treat | |
1624 | * it as a regular write I/O. | |
1625 | */ | |
5511754b | 1626 | zio->io_bp_override = NULL; |
3dfb57a3 DB |
1627 | *bp = zio->io_bp_orig; |
1628 | zio->io_pipeline = zio->io_orig_pipeline; | |
1629 | } | |
1630 | ||
62840030 | 1631 | return (zio); |
3dfb57a3 DB |
1632 | } |
1633 | ||
62840030 | 1634 | static zio_t * |
3dfb57a3 DB |
1635 | zio_write_compress(zio_t *zio) |
1636 | { | |
1637 | spa_t *spa = zio->io_spa; | |
1638 | zio_prop_t *zp = &zio->io_prop; | |
1639 | enum zio_compress compress = zp->zp_compress; | |
1640 | blkptr_t *bp = zio->io_bp; | |
1641 | uint64_t lsize = zio->io_lsize; | |
1642 | uint64_t psize = zio->io_size; | |
1643 | int pass = 1; | |
1644 | ||
3dfb57a3 DB |
1645 | /* |
1646 | * If our children haven't all reached the ready stage, | |
1647 | * wait for them and then repeat this pipeline stage. | |
1648 | */ | |
ddc751d5 GW |
1649 | if (zio_wait_for_children(zio, ZIO_CHILD_LOGICAL_BIT | |
1650 | ZIO_CHILD_GANG_BIT, ZIO_WAIT_READY)) { | |
62840030 | 1651 | return (NULL); |
ddc751d5 | 1652 | } |
3dfb57a3 DB |
1653 | |
1654 | if (!IO_IS_ALLOCATING(zio)) | |
62840030 | 1655 | return (zio); |
3dfb57a3 DB |
1656 | |
1657 | if (zio->io_children_ready != NULL) { | |
1658 | /* | |
1659 | * Now that all our children are ready, run the callback | |
1660 | * associated with this zio in case it wants to modify the | |
1661 | * data to be written. | |
1662 | */ | |
1663 | ASSERT3U(zp->zp_level, >, 0); | |
1664 | zio->io_children_ready(zio); | |
428870ff | 1665 | } |
34dc7c2f | 1666 | |
3dfb57a3 DB |
1667 | ASSERT(zio->io_child_type != ZIO_CHILD_DDT); |
1668 | ASSERT(zio->io_bp_override == NULL); | |
1669 | ||
b0bc7a84 | 1670 | if (!BP_IS_HOLE(bp) && bp->blk_birth == zio->io_txg) { |
b128c09f BB |
1671 | /* |
1672 | * We're rewriting an existing block, which means we're | |
1673 | * working on behalf of spa_sync(). For spa_sync() to | |
1674 | * converge, it must eventually be the case that we don't | |
1675 | * have to allocate new blocks. But compression changes | |
1676 | * the blocksize, which forces a reallocate, and makes | |
1677 | * convergence take longer. Therefore, after the first | |
1678 | * few passes, stop compressing to ensure convergence. | |
1679 | */ | |
428870ff BB |
1680 | pass = spa_sync_pass(spa); |
1681 | ||
1682 | ASSERT(zio->io_txg == spa_syncing_txg(spa)); | |
1683 | ASSERT(zio->io_child_type == ZIO_CHILD_LOGICAL); | |
1684 | ASSERT(!BP_GET_DEDUP(bp)); | |
34dc7c2f | 1685 | |
55d85d5a | 1686 | if (pass >= zfs_sync_pass_dont_compress) |
b128c09f | 1687 | compress = ZIO_COMPRESS_OFF; |
34dc7c2f | 1688 | |
b128c09f | 1689 | /* Make sure someone doesn't change their mind on overwrites */ |
9b67f605 | 1690 | ASSERT(BP_IS_EMBEDDED(bp) || MIN(zp->zp_copies + BP_IS_GANG(bp), |
428870ff | 1691 | spa_max_replication(spa)) == BP_GET_NDVAS(bp)); |
b128c09f | 1692 | } |
34dc7c2f | 1693 | |
2aa34383 | 1694 | /* If it's a compressed write that is not raw, compress the buffer. */ |
b5256303 TC |
1695 | if (compress != ZIO_COMPRESS_OFF && |
1696 | !(zio->io_flags & ZIO_FLAG_RAW_COMPRESS)) { | |
428870ff | 1697 | void *cbuf = zio_buf_alloc(lsize); |
10b3c7f5 MN |
1698 | psize = zio_compress_data(compress, zio->io_abd, cbuf, lsize, |
1699 | zp->zp_complevel); | |
1700 | if (psize == 0 || psize >= lsize) { | |
b128c09f | 1701 | compress = ZIO_COMPRESS_OFF; |
428870ff | 1702 | zio_buf_free(cbuf, lsize); |
b5256303 TC |
1703 | } else if (!zp->zp_dedup && !zp->zp_encrypt && |
1704 | psize <= BPE_PAYLOAD_SIZE && | |
9b67f605 MA |
1705 | zp->zp_level == 0 && !DMU_OT_HAS_FILL(zp->zp_type) && |
1706 | spa_feature_is_enabled(spa, SPA_FEATURE_EMBEDDED_DATA)) { | |
1707 | encode_embedded_bp_compressed(bp, | |
1708 | cbuf, compress, lsize, psize); | |
1709 | BPE_SET_ETYPE(bp, BP_EMBEDDED_TYPE_DATA); | |
1710 | BP_SET_TYPE(bp, zio->io_prop.zp_type); | |
1711 | BP_SET_LEVEL(bp, zio->io_prop.zp_level); | |
1712 | zio_buf_free(cbuf, lsize); | |
1713 | bp->blk_birth = zio->io_txg; | |
1714 | zio->io_pipeline = ZIO_INTERLOCK_PIPELINE; | |
1715 | ASSERT(spa_feature_is_active(spa, | |
1716 | SPA_FEATURE_EMBEDDED_DATA)); | |
62840030 | 1717 | return (zio); |
428870ff | 1718 | } else { |
9b67f605 | 1719 | /* |
b2255edc BB |
1720 | * Round compressed size up to the minimum allocation |
1721 | * size of the smallest-ashift device, and zero the | |
1722 | * tail. This ensures that the compressed size of the | |
1723 | * BP (and thus compressratio property) are correct, | |
c3520e7f MA |
1724 | * in that we charge for the padding used to fill out |
1725 | * the last sector. | |
9b67f605 | 1726 | */ |
b2255edc BB |
1727 | ASSERT3U(spa->spa_min_alloc, >=, SPA_MINBLOCKSHIFT); |
1728 | size_t rounded = (size_t)roundup(psize, | |
1729 | spa->spa_min_alloc); | |
c3520e7f | 1730 | if (rounded >= lsize) { |
9b67f605 MA |
1731 | compress = ZIO_COMPRESS_OFF; |
1732 | zio_buf_free(cbuf, lsize); | |
c3520e7f | 1733 | psize = lsize; |
9b67f605 | 1734 | } else { |
a6255b7f DQ |
1735 | abd_t *cdata = abd_get_from_buf(cbuf, lsize); |
1736 | abd_take_ownership_of_buf(cdata, B_TRUE); | |
1737 | abd_zero_off(cdata, psize, rounded - psize); | |
c3520e7f | 1738 | psize = rounded; |
a6255b7f | 1739 | zio_push_transform(zio, cdata, |
9b67f605 MA |
1740 | psize, lsize, NULL); |
1741 | } | |
b128c09f | 1742 | } |
3dfb57a3 DB |
1743 | |
1744 | /* | |
1745 | * We were unable to handle this as an override bp, treat | |
1746 | * it as a regular write I/O. | |
1747 | */ | |
1748 | zio->io_bp_override = NULL; | |
1749 | *bp = zio->io_bp_orig; | |
1750 | zio->io_pipeline = zio->io_orig_pipeline; | |
1751 | ||
b1d21733 TC |
1752 | } else if ((zio->io_flags & ZIO_FLAG_RAW_ENCRYPT) != 0 && |
1753 | zp->zp_type == DMU_OT_DNODE) { | |
1754 | /* | |
1755 | * The DMU actually relies on the zio layer's compression | |
1756 | * to free metadnode blocks that have had all contained | |
1757 | * dnodes freed. As a result, even when doing a raw | |
1758 | * receive, we must check whether the block can be compressed | |
1759 | * to a hole. | |
1760 | */ | |
1761 | psize = zio_compress_data(ZIO_COMPRESS_EMPTY, | |
10b3c7f5 MN |
1762 | zio->io_abd, NULL, lsize, zp->zp_complevel); |
1763 | if (psize == 0 || psize >= lsize) | |
b1d21733 | 1764 | compress = ZIO_COMPRESS_OFF; |
52a36bd4 GA |
1765 | } else if (zio->io_flags & ZIO_FLAG_RAW_COMPRESS && |
1766 | !(zio->io_flags & ZIO_FLAG_RAW_ENCRYPT)) { | |
1767 | /* | |
1768 | * If we are raw receiving an encrypted dataset we should not | |
1769 | * take this codepath because it will change the on-disk block | |
1770 | * and decryption will fail. | |
1771 | */ | |
c634320e PD |
1772 | size_t rounded = MIN((size_t)roundup(psize, |
1773 | spa->spa_min_alloc), lsize); | |
1774 | ||
1775 | if (rounded != psize) { | |
1776 | abd_t *cdata = abd_alloc_linear(rounded, B_TRUE); | |
1777 | abd_zero_off(cdata, psize, rounded - psize); | |
1778 | abd_copy_off(cdata, zio->io_abd, 0, 0, psize); | |
1779 | psize = rounded; | |
1780 | zio_push_transform(zio, cdata, | |
1781 | psize, rounded, NULL); | |
1782 | } | |
2aa34383 DK |
1783 | } else { |
1784 | ASSERT3U(psize, !=, 0); | |
b128c09f | 1785 | } |
34dc7c2f | 1786 | |
b128c09f BB |
1787 | /* |
1788 | * The final pass of spa_sync() must be all rewrites, but the first | |
1789 | * few passes offer a trade-off: allocating blocks defers convergence, | |
1790 | * but newly allocated blocks are sequential, so they can be written | |
1791 | * to disk faster. Therefore, we allow the first few passes of | |
1792 | * spa_sync() to allocate new blocks, but force rewrites after that. | |
1793 | * There should only be a handful of blocks after pass 1 in any case. | |
1794 | */ | |
b0bc7a84 MG |
1795 | if (!BP_IS_HOLE(bp) && bp->blk_birth == zio->io_txg && |
1796 | BP_GET_PSIZE(bp) == psize && | |
55d85d5a | 1797 | pass >= zfs_sync_pass_rewrite) { |
cc99f275 | 1798 | VERIFY3U(psize, !=, 0); |
1c27024e | 1799 | enum zio_stage gang_stages = zio->io_pipeline & ZIO_GANG_STAGES; |
cc99f275 | 1800 | |
b128c09f BB |
1801 | zio->io_pipeline = ZIO_REWRITE_PIPELINE | gang_stages; |
1802 | zio->io_flags |= ZIO_FLAG_IO_REWRITE; | |
1803 | } else { | |
1804 | BP_ZERO(bp); | |
1805 | zio->io_pipeline = ZIO_WRITE_PIPELINE; | |
1806 | } | |
34dc7c2f | 1807 | |
428870ff | 1808 | if (psize == 0) { |
b0bc7a84 MG |
1809 | if (zio->io_bp_orig.blk_birth != 0 && |
1810 | spa_feature_is_active(spa, SPA_FEATURE_HOLE_BIRTH)) { | |
1811 | BP_SET_LSIZE(bp, lsize); | |
1812 | BP_SET_TYPE(bp, zp->zp_type); | |
1813 | BP_SET_LEVEL(bp, zp->zp_level); | |
1814 | BP_SET_BIRTH(bp, zio->io_txg, 0); | |
1815 | } | |
b128c09f BB |
1816 | zio->io_pipeline = ZIO_INTERLOCK_PIPELINE; |
1817 | } else { | |
1818 | ASSERT(zp->zp_checksum != ZIO_CHECKSUM_GANG_HEADER); | |
1819 | BP_SET_LSIZE(bp, lsize); | |
b0bc7a84 MG |
1820 | BP_SET_TYPE(bp, zp->zp_type); |
1821 | BP_SET_LEVEL(bp, zp->zp_level); | |
428870ff | 1822 | BP_SET_PSIZE(bp, psize); |
b128c09f BB |
1823 | BP_SET_COMPRESS(bp, compress); |
1824 | BP_SET_CHECKSUM(bp, zp->zp_checksum); | |
428870ff | 1825 | BP_SET_DEDUP(bp, zp->zp_dedup); |
b128c09f | 1826 | BP_SET_BYTEORDER(bp, ZFS_HOST_BYTEORDER); |
428870ff BB |
1827 | if (zp->zp_dedup) { |
1828 | ASSERT(zio->io_child_type == ZIO_CHILD_LOGICAL); | |
1829 | ASSERT(!(zio->io_flags & ZIO_FLAG_IO_REWRITE)); | |
b5256303 TC |
1830 | ASSERT(!zp->zp_encrypt || |
1831 | DMU_OT_IS_ENCRYPTED(zp->zp_type)); | |
428870ff BB |
1832 | zio->io_pipeline = ZIO_DDT_WRITE_PIPELINE; |
1833 | } | |
03c6040b GW |
1834 | if (zp->zp_nopwrite) { |
1835 | ASSERT(zio->io_child_type == ZIO_CHILD_LOGICAL); | |
1836 | ASSERT(!(zio->io_flags & ZIO_FLAG_IO_REWRITE)); | |
1837 | zio->io_pipeline |= ZIO_STAGE_NOP_WRITE; | |
1838 | } | |
428870ff | 1839 | } |
62840030 | 1840 | return (zio); |
428870ff BB |
1841 | } |
1842 | ||
62840030 | 1843 | static zio_t * |
428870ff BB |
1844 | zio_free_bp_init(zio_t *zio) |
1845 | { | |
1846 | blkptr_t *bp = zio->io_bp; | |
1847 | ||
1848 | if (zio->io_child_type == ZIO_CHILD_LOGICAL) { | |
1849 | if (BP_GET_DEDUP(bp)) | |
1850 | zio->io_pipeline = ZIO_DDT_FREE_PIPELINE; | |
b128c09f | 1851 | } |
34dc7c2f | 1852 | |
a1d477c2 MA |
1853 | ASSERT3P(zio->io_bp, ==, &zio->io_bp_copy); |
1854 | ||
62840030 | 1855 | return (zio); |
34dc7c2f BB |
1856 | } |
1857 | ||
b128c09f BB |
1858 | /* |
1859 | * ========================================================================== | |
1860 | * Execute the I/O pipeline | |
1861 | * ========================================================================== | |
1862 | */ | |
1863 | ||
1864 | static void | |
7ef5e54e | 1865 | zio_taskq_dispatch(zio_t *zio, zio_taskq_type_t q, boolean_t cutinline) |
34dc7c2f | 1866 | { |
428870ff | 1867 | spa_t *spa = zio->io_spa; |
b128c09f | 1868 | zio_type_t t = zio->io_type; |
a38718a6 | 1869 | int flags = (cutinline ? TQ_FRONT : 0); |
34dc7c2f BB |
1870 | |
1871 | /* | |
9babb374 BB |
1872 | * If we're a config writer or a probe, the normal issue and |
1873 | * interrupt threads may all be blocked waiting for the config lock. | |
1874 | * In this case, select the otherwise-unused taskq for ZIO_TYPE_NULL. | |
34dc7c2f | 1875 | */ |
9babb374 | 1876 | if (zio->io_flags & (ZIO_FLAG_CONFIG_WRITER | ZIO_FLAG_PROBE)) |
b128c09f | 1877 | t = ZIO_TYPE_NULL; |
34dc7c2f BB |
1878 | |
1879 | /* | |
b128c09f | 1880 | * A similar issue exists for the L2ARC write thread until L2ARC 2.0. |
34dc7c2f | 1881 | */ |
b128c09f BB |
1882 | if (t == ZIO_TYPE_WRITE && zio->io_vd && zio->io_vd->vdev_aux) |
1883 | t = ZIO_TYPE_NULL; | |
34dc7c2f | 1884 | |
428870ff | 1885 | /* |
7ef5e54e AL |
1886 | * If this is a high priority I/O, then use the high priority taskq if |
1887 | * available. | |
428870ff | 1888 | */ |
18b14b17 GW |
1889 | if ((zio->io_priority == ZIO_PRIORITY_NOW || |
1890 | zio->io_priority == ZIO_PRIORITY_SYNC_WRITE) && | |
7ef5e54e | 1891 | spa->spa_zio_taskq[t][q + 1].stqs_count != 0) |
428870ff BB |
1892 | q++; |
1893 | ||
1894 | ASSERT3U(q, <, ZIO_TASKQ_TYPES); | |
5cc556b4 | 1895 | |
a38718a6 GA |
1896 | /* |
1897 | * NB: We are assuming that the zio can only be dispatched | |
1898 | * to a single taskq at a time. It would be a grievous error | |
1899 | * to dispatch the zio to another taskq at the same time. | |
1900 | */ | |
1901 | ASSERT(taskq_empty_ent(&zio->io_tqent)); | |
23c13c7e AL |
1902 | spa_taskq_dispatch_ent(spa, t, q, zio_execute, zio, flags, |
1903 | &zio->io_tqent); | |
b128c09f | 1904 | } |
34dc7c2f | 1905 | |
b128c09f | 1906 | static boolean_t |
7ef5e54e | 1907 | zio_taskq_member(zio_t *zio, zio_taskq_type_t q) |
b128c09f | 1908 | { |
b128c09f | 1909 | spa_t *spa = zio->io_spa; |
34dc7c2f | 1910 | |
b3212d2f MA |
1911 | taskq_t *tq = taskq_of_curthread(); |
1912 | ||
1c27024e | 1913 | for (zio_type_t t = 0; t < ZIO_TYPES; t++) { |
7ef5e54e AL |
1914 | spa_taskqs_t *tqs = &spa->spa_zio_taskq[t][q]; |
1915 | uint_t i; | |
1916 | for (i = 0; i < tqs->stqs_count; i++) { | |
b3212d2f | 1917 | if (tqs->stqs_taskq[i] == tq) |
7ef5e54e AL |
1918 | return (B_TRUE); |
1919 | } | |
1920 | } | |
34dc7c2f | 1921 | |
b128c09f BB |
1922 | return (B_FALSE); |
1923 | } | |
34dc7c2f | 1924 | |
62840030 | 1925 | static zio_t * |
b128c09f BB |
1926 | zio_issue_async(zio_t *zio) |
1927 | { | |
428870ff | 1928 | zio_taskq_dispatch(zio, ZIO_TASKQ_ISSUE, B_FALSE); |
b128c09f | 1929 | |
62840030 | 1930 | return (NULL); |
34dc7c2f BB |
1931 | } |
1932 | ||
b128c09f | 1933 | void |
23c13c7e | 1934 | zio_interrupt(void *zio) |
34dc7c2f | 1935 | { |
428870ff | 1936 | zio_taskq_dispatch(zio, ZIO_TASKQ_INTERRUPT, B_FALSE); |
b128c09f | 1937 | } |
34dc7c2f | 1938 | |
d3c1e45b MM |
1939 | void |
1940 | zio_delay_interrupt(zio_t *zio) | |
1941 | { | |
1942 | /* | |
1943 | * The timeout_generic() function isn't defined in userspace, so | |
1944 | * rather than trying to implement the function, the zio delay | |
1945 | * functionality has been disabled for userspace builds. | |
1946 | */ | |
1947 | ||
1948 | #ifdef _KERNEL | |
1949 | /* | |
1950 | * If io_target_timestamp is zero, then no delay has been registered | |
1951 | * for this IO, thus jump to the end of this function and "skip" the | |
1952 | * delay; issuing it directly to the zio layer. | |
1953 | */ | |
1954 | if (zio->io_target_timestamp != 0) { | |
1955 | hrtime_t now = gethrtime(); | |
1956 | ||
1957 | if (now >= zio->io_target_timestamp) { | |
1958 | /* | |
1959 | * This IO has already taken longer than the target | |
1960 | * delay to complete, so we don't want to delay it | |
1961 | * any longer; we "miss" the delay and issue it | |
1962 | * directly to the zio layer. This is likely due to | |
1963 | * the target latency being set to a value less than | |
1964 | * the underlying hardware can satisfy (e.g. delay | |
1965 | * set to 1ms, but the disks take 10ms to complete an | |
1966 | * IO request). | |
1967 | */ | |
1968 | ||
1969 | DTRACE_PROBE2(zio__delay__miss, zio_t *, zio, | |
1970 | hrtime_t, now); | |
1971 | ||
1972 | zio_interrupt(zio); | |
1973 | } else { | |
1974 | taskqid_t tid; | |
1975 | hrtime_t diff = zio->io_target_timestamp - now; | |
1976 | clock_t expire_at_tick = ddi_get_lbolt() + | |
1977 | NSEC_TO_TICK(diff); | |
1978 | ||
1979 | DTRACE_PROBE3(zio__delay__hit, zio_t *, zio, | |
1980 | hrtime_t, now, hrtime_t, diff); | |
1981 | ||
1982 | if (NSEC_TO_TICK(diff) == 0) { | |
1983 | /* Our delay is less than a jiffy - just spin */ | |
1984 | zfs_sleep_until(zio->io_target_timestamp); | |
1985 | zio_interrupt(zio); | |
1986 | } else { | |
1987 | /* | |
1988 | * Use taskq_dispatch_delay() in the place of | |
1989 | * OpenZFS's timeout_generic(). | |
1990 | */ | |
1991 | tid = taskq_dispatch_delay(system_taskq, | |
23c13c7e AL |
1992 | zio_interrupt, zio, TQ_NOSLEEP, |
1993 | expire_at_tick); | |
d3c1e45b MM |
1994 | if (tid == TASKQID_INVALID) { |
1995 | /* | |
1996 | * Couldn't allocate a task. Just | |
1997 | * finish the zio without a delay. | |
1998 | */ | |
1999 | zio_interrupt(zio); | |
2000 | } | |
2001 | } | |
2002 | } | |
2003 | return; | |
2004 | } | |
2005 | #endif | |
2006 | DTRACE_PROBE1(zio__delay__skip, zio_t *, zio); | |
2007 | zio_interrupt(zio); | |
2008 | } | |
2009 | ||
8fb1ede1 | 2010 | static void |
638dd5f4 | 2011 | zio_deadman_impl(zio_t *pio, int ziodepth) |
8fb1ede1 BB |
2012 | { |
2013 | zio_t *cio, *cio_next; | |
2014 | zio_link_t *zl = NULL; | |
2015 | vdev_t *vd = pio->io_vd; | |
2016 | ||
638dd5f4 TC |
2017 | if (zio_deadman_log_all || (vd != NULL && vd->vdev_ops->vdev_op_leaf)) { |
2018 | vdev_queue_t *vq = vd ? &vd->vdev_queue : NULL; | |
8fb1ede1 BB |
2019 | zbookmark_phys_t *zb = &pio->io_bookmark; |
2020 | uint64_t delta = gethrtime() - pio->io_timestamp; | |
2021 | uint64_t failmode = spa_get_deadman_failmode(pio->io_spa); | |
2022 | ||
a887d653 | 2023 | zfs_dbgmsg("slow zio[%d]: zio=%px timestamp=%llu " |
8fb1ede1 | 2024 | "delta=%llu queued=%llu io=%llu " |
8e739b2c RE |
2025 | "path=%s " |
2026 | "last=%llu type=%d " | |
2027 | "priority=%d flags=0x%x stage=0x%x " | |
2028 | "pipeline=0x%x pipeline-trace=0x%x " | |
2029 | "objset=%llu object=%llu " | |
2030 | "level=%llu blkid=%llu " | |
2031 | "offset=%llu size=%llu " | |
2032 | "error=%d", | |
638dd5f4 | 2033 | ziodepth, pio, pio->io_timestamp, |
8e739b2c RE |
2034 | (u_longlong_t)delta, pio->io_delta, pio->io_delay, |
2035 | vd ? vd->vdev_path : "NULL", | |
2036 | vq ? vq->vq_io_complete_ts : 0, pio->io_type, | |
2037 | pio->io_priority, pio->io_flags, pio->io_stage, | |
2038 | pio->io_pipeline, pio->io_pipeline_trace, | |
2039 | (u_longlong_t)zb->zb_objset, (u_longlong_t)zb->zb_object, | |
2040 | (u_longlong_t)zb->zb_level, (u_longlong_t)zb->zb_blkid, | |
2041 | (u_longlong_t)pio->io_offset, (u_longlong_t)pio->io_size, | |
2042 | pio->io_error); | |
1144586b | 2043 | (void) zfs_ereport_post(FM_EREPORT_ZFS_DEADMAN, |
4f072827 | 2044 | pio->io_spa, vd, zb, pio, 0); |
8fb1ede1 BB |
2045 | |
2046 | if (failmode == ZIO_FAILURE_MODE_CONTINUE && | |
2047 | taskq_empty_ent(&pio->io_tqent)) { | |
2048 | zio_interrupt(pio); | |
2049 | } | |
2050 | } | |
2051 | ||
2052 | mutex_enter(&pio->io_lock); | |
2053 | for (cio = zio_walk_children(pio, &zl); cio != NULL; cio = cio_next) { | |
2054 | cio_next = zio_walk_children(pio, &zl); | |
638dd5f4 | 2055 | zio_deadman_impl(cio, ziodepth + 1); |
8fb1ede1 BB |
2056 | } |
2057 | mutex_exit(&pio->io_lock); | |
2058 | } | |
2059 | ||
2060 | /* | |
2061 | * Log the critical information describing this zio and all of its children | |
2062 | * using the zfs_dbgmsg() interface then post deadman event for the ZED. | |
2063 | */ | |
2064 | void | |
2065 | zio_deadman(zio_t *pio, char *tag) | |
2066 | { | |
2067 | spa_t *spa = pio->io_spa; | |
2068 | char *name = spa_name(spa); | |
2069 | ||
2070 | if (!zfs_deadman_enabled || spa_suspended(spa)) | |
2071 | return; | |
2072 | ||
638dd5f4 | 2073 | zio_deadman_impl(pio, 0); |
8fb1ede1 BB |
2074 | |
2075 | switch (spa_get_deadman_failmode(spa)) { | |
2076 | case ZIO_FAILURE_MODE_WAIT: | |
2077 | zfs_dbgmsg("%s waiting for hung I/O to pool '%s'", tag, name); | |
2078 | break; | |
2079 | ||
2080 | case ZIO_FAILURE_MODE_CONTINUE: | |
2081 | zfs_dbgmsg("%s restarting hung I/O for pool '%s'", tag, name); | |
2082 | break; | |
2083 | ||
2084 | case ZIO_FAILURE_MODE_PANIC: | |
2085 | fm_panic("%s determined I/O to pool '%s' is hung.", tag, name); | |
2086 | break; | |
2087 | } | |
2088 | } | |
2089 | ||
b128c09f BB |
2090 | /* |
2091 | * Execute the I/O pipeline until one of the following occurs: | |
2092 | * (1) the I/O completes; (2) the pipeline stalls waiting for | |
2093 | * dependent child I/Os; (3) the I/O issues, so we're waiting | |
2094 | * for an I/O completion interrupt; (4) the I/O is delegated by | |
2095 | * vdev-level caching or aggregation; (5) the I/O is deferred | |
2096 | * due to vdev-level queueing; (6) the I/O is handed off to | |
2097 | * another thread. In all cases, the pipeline stops whenever | |
8e07b99b | 2098 | * there's no CPU work; it never burns a thread in cv_wait_io(). |
b128c09f BB |
2099 | * |
2100 | * There's no locking on io_stage because there's no legitimate way | |
2101 | * for multiple threads to be attempting to process the same I/O. | |
2102 | */ | |
428870ff | 2103 | static zio_pipe_stage_t *zio_pipeline[]; |
34dc7c2f | 2104 | |
da6b4005 NB |
2105 | /* |
2106 | * zio_execute() is a wrapper around the static function | |
2107 | * __zio_execute() so that we can force __zio_execute() to be | |
2108 | * inlined. This reduces stack overhead which is important | |
2109 | * because __zio_execute() is called recursively in several zio | |
2110 | * code paths. zio_execute() itself cannot be inlined because | |
2111 | * it is externally visible. | |
2112 | */ | |
b128c09f | 2113 | void |
23c13c7e | 2114 | zio_execute(void *zio) |
da6b4005 | 2115 | { |
92119cc2 BB |
2116 | fstrans_cookie_t cookie; |
2117 | ||
2118 | cookie = spl_fstrans_mark(); | |
da6b4005 | 2119 | __zio_execute(zio); |
92119cc2 | 2120 | spl_fstrans_unmark(cookie); |
da6b4005 NB |
2121 | } |
2122 | ||
b58986ee BB |
2123 | /* |
2124 | * Used to determine if in the current context the stack is sized large | |
2125 | * enough to allow zio_execute() to be called recursively. A minimum | |
2126 | * stack size of 16K is required to avoid needing to re-dispatch the zio. | |
2127 | */ | |
65c7cc49 | 2128 | static boolean_t |
b58986ee BB |
2129 | zio_execute_stack_check(zio_t *zio) |
2130 | { | |
2131 | #if !defined(HAVE_LARGE_STACKS) | |
2132 | dsl_pool_t *dp = spa_get_dsl(zio->io_spa); | |
2133 | ||
2134 | /* Executing in txg_sync_thread() context. */ | |
2135 | if (dp && curthread == dp->dp_tx.tx_sync_thread) | |
2136 | return (B_TRUE); | |
2137 | ||
2138 | /* Pool initialization outside of zio_taskq context. */ | |
2139 | if (dp && spa_is_initializing(dp->dp_spa) && | |
2140 | !zio_taskq_member(zio, ZIO_TASKQ_ISSUE) && | |
2141 | !zio_taskq_member(zio, ZIO_TASKQ_ISSUE_HIGH)) | |
2142 | return (B_TRUE); | |
14e4e3cb AZ |
2143 | #else |
2144 | (void) zio; | |
b58986ee BB |
2145 | #endif /* HAVE_LARGE_STACKS */ |
2146 | ||
2147 | return (B_FALSE); | |
2148 | } | |
2149 | ||
da6b4005 NB |
2150 | __attribute__((always_inline)) |
2151 | static inline void | |
2152 | __zio_execute(zio_t *zio) | |
b128c09f | 2153 | { |
3dfb57a3 DB |
2154 | ASSERT3U(zio->io_queued_timestamp, >, 0); |
2155 | ||
b128c09f | 2156 | while (zio->io_stage < ZIO_STAGE_DONE) { |
428870ff BB |
2157 | enum zio_stage pipeline = zio->io_pipeline; |
2158 | enum zio_stage stage = zio->io_stage; | |
62840030 MA |
2159 | |
2160 | zio->io_executor = curthread; | |
34dc7c2f | 2161 | |
b128c09f | 2162 | ASSERT(!MUTEX_HELD(&zio->io_lock)); |
428870ff BB |
2163 | ASSERT(ISP2(stage)); |
2164 | ASSERT(zio->io_stall == NULL); | |
34dc7c2f | 2165 | |
428870ff BB |
2166 | do { |
2167 | stage <<= 1; | |
2168 | } while ((stage & pipeline) == 0); | |
b128c09f BB |
2169 | |
2170 | ASSERT(stage <= ZIO_STAGE_DONE); | |
34dc7c2f BB |
2171 | |
2172 | /* | |
b128c09f BB |
2173 | * If we are in interrupt context and this pipeline stage |
2174 | * will grab a config lock that is held across I/O, | |
428870ff BB |
2175 | * or may wait for an I/O that needs an interrupt thread |
2176 | * to complete, issue async to avoid deadlock. | |
2177 | * | |
2178 | * For VDEV_IO_START, we cut in line so that the io will | |
2179 | * be sent to disk promptly. | |
34dc7c2f | 2180 | */ |
91579709 BB |
2181 | if ((stage & ZIO_BLOCKING_STAGES) && zio->io_vd == NULL && |
2182 | zio_taskq_member(zio, ZIO_TASKQ_INTERRUPT)) { | |
b58986ee BB |
2183 | boolean_t cut = (stage == ZIO_STAGE_VDEV_IO_START) ? |
2184 | zio_requeue_io_start_cut_in_line : B_FALSE; | |
91579709 BB |
2185 | zio_taskq_dispatch(zio, ZIO_TASKQ_ISSUE, cut); |
2186 | return; | |
2187 | } | |
2188 | ||
2189 | /* | |
b58986ee BB |
2190 | * If the current context doesn't have large enough stacks |
2191 | * the zio must be issued asynchronously to prevent overflow. | |
91579709 | 2192 | */ |
b58986ee BB |
2193 | if (zio_execute_stack_check(zio)) { |
2194 | boolean_t cut = (stage == ZIO_STAGE_VDEV_IO_START) ? | |
2195 | zio_requeue_io_start_cut_in_line : B_FALSE; | |
428870ff | 2196 | zio_taskq_dispatch(zio, ZIO_TASKQ_ISSUE, cut); |
b128c09f | 2197 | return; |
34dc7c2f BB |
2198 | } |
2199 | ||
b128c09f | 2200 | zio->io_stage = stage; |
3dfb57a3 | 2201 | zio->io_pipeline_trace |= zio->io_stage; |
34dc7c2f | 2202 | |
62840030 MA |
2203 | /* |
2204 | * The zio pipeline stage returns the next zio to execute | |
2205 | * (typically the same as this one), or NULL if we should | |
2206 | * stop. | |
2207 | */ | |
2208 | zio = zio_pipeline[highbit64(stage) - 1](zio); | |
34dc7c2f | 2209 | |
62840030 MA |
2210 | if (zio == NULL) |
2211 | return; | |
b128c09f | 2212 | } |
34dc7c2f BB |
2213 | } |
2214 | ||
da6b4005 | 2215 | |
b128c09f BB |
2216 | /* |
2217 | * ========================================================================== | |
2218 | * Initiate I/O, either sync or async | |
2219 | * ========================================================================== | |
2220 | */ | |
2221 | int | |
2222 | zio_wait(zio_t *zio) | |
34dc7c2f | 2223 | { |
9cdf7b1f MA |
2224 | /* |
2225 | * Some routines, like zio_free_sync(), may return a NULL zio | |
2226 | * to avoid the performance overhead of creating and then destroying | |
2227 | * an unneeded zio. For the callers' simplicity, we accept a NULL | |
2228 | * zio and ignore it. | |
2229 | */ | |
2230 | if (zio == NULL) | |
2231 | return (0); | |
2232 | ||
8fb1ede1 | 2233 | long timeout = MSEC_TO_TICK(zfs_deadman_ziotime_ms); |
b128c09f | 2234 | int error; |
34dc7c2f | 2235 | |
1ce23dca PS |
2236 | ASSERT3S(zio->io_stage, ==, ZIO_STAGE_OPEN); |
2237 | ASSERT3P(zio->io_executor, ==, NULL); | |
34dc7c2f | 2238 | |
b128c09f | 2239 | zio->io_waiter = curthread; |
3dfb57a3 DB |
2240 | ASSERT0(zio->io_queued_timestamp); |
2241 | zio->io_queued_timestamp = gethrtime(); | |
34dc7c2f | 2242 | |
da6b4005 | 2243 | __zio_execute(zio); |
34dc7c2f | 2244 | |
b128c09f | 2245 | mutex_enter(&zio->io_lock); |
8fb1ede1 BB |
2246 | while (zio->io_executor != NULL) { |
2247 | error = cv_timedwait_io(&zio->io_cv, &zio->io_lock, | |
2248 | ddi_get_lbolt() + timeout); | |
2249 | ||
2250 | if (zfs_deadman_enabled && error == -1 && | |
2251 | gethrtime() - zio->io_queued_timestamp > | |
2252 | spa_deadman_ziotime(zio->io_spa)) { | |
2253 | mutex_exit(&zio->io_lock); | |
2254 | timeout = MSEC_TO_TICK(zfs_deadman_checktime_ms); | |
2255 | zio_deadman(zio, FTAG); | |
2256 | mutex_enter(&zio->io_lock); | |
2257 | } | |
2258 | } | |
b128c09f | 2259 | mutex_exit(&zio->io_lock); |
34dc7c2f | 2260 | |
b128c09f BB |
2261 | error = zio->io_error; |
2262 | zio_destroy(zio); | |
34dc7c2f | 2263 | |
b128c09f BB |
2264 | return (error); |
2265 | } | |
34dc7c2f | 2266 | |
b128c09f BB |
2267 | void |
2268 | zio_nowait(zio_t *zio) | |
2269 | { | |
9cdf7b1f MA |
2270 | /* |
2271 | * See comment in zio_wait(). | |
2272 | */ | |
2273 | if (zio == NULL) | |
2274 | return; | |
2275 | ||
1ce23dca | 2276 | ASSERT3P(zio->io_executor, ==, NULL); |
34dc7c2f | 2277 | |
d164b209 BB |
2278 | if (zio->io_child_type == ZIO_CHILD_LOGICAL && |
2279 | zio_unique_parent(zio) == NULL) { | |
8878261f BB |
2280 | zio_t *pio; |
2281 | ||
34dc7c2f | 2282 | /* |
b128c09f | 2283 | * This is a logical async I/O with no parent to wait for it. |
9babb374 BB |
2284 | * We add it to the spa_async_root_zio "Godfather" I/O which |
2285 | * will ensure they complete prior to unloading the pool. | |
34dc7c2f | 2286 | */ |
b128c09f | 2287 | spa_t *spa = zio->io_spa; |
09eb36ce | 2288 | pio = spa->spa_async_zio_root[CPU_SEQID_UNSTABLE]; |
9babb374 | 2289 | |
8878261f | 2290 | zio_add_child(pio, zio); |
b128c09f | 2291 | } |
34dc7c2f | 2292 | |
3dfb57a3 DB |
2293 | ASSERT0(zio->io_queued_timestamp); |
2294 | zio->io_queued_timestamp = gethrtime(); | |
da6b4005 | 2295 | __zio_execute(zio); |
b128c09f | 2296 | } |
34dc7c2f | 2297 | |
b128c09f BB |
2298 | /* |
2299 | * ========================================================================== | |
1ce23dca | 2300 | * Reexecute, cancel, or suspend/resume failed I/O |
b128c09f BB |
2301 | * ========================================================================== |
2302 | */ | |
34dc7c2f | 2303 | |
b128c09f | 2304 | static void |
23c13c7e | 2305 | zio_reexecute(void *arg) |
b128c09f | 2306 | { |
23c13c7e | 2307 | zio_t *pio = arg; |
d164b209 BB |
2308 | zio_t *cio, *cio_next; |
2309 | ||
2310 | ASSERT(pio->io_child_type == ZIO_CHILD_LOGICAL); | |
2311 | ASSERT(pio->io_orig_stage == ZIO_STAGE_OPEN); | |
9babb374 BB |
2312 | ASSERT(pio->io_gang_leader == NULL); |
2313 | ASSERT(pio->io_gang_tree == NULL); | |
34dc7c2f | 2314 | |
b128c09f BB |
2315 | pio->io_flags = pio->io_orig_flags; |
2316 | pio->io_stage = pio->io_orig_stage; | |
2317 | pio->io_pipeline = pio->io_orig_pipeline; | |
2318 | pio->io_reexecute = 0; | |
03c6040b | 2319 | pio->io_flags |= ZIO_FLAG_REEXECUTED; |
3dfb57a3 | 2320 | pio->io_pipeline_trace = 0; |
b128c09f | 2321 | pio->io_error = 0; |
1c27024e | 2322 | for (int w = 0; w < ZIO_WAIT_TYPES; w++) |
d164b209 | 2323 | pio->io_state[w] = 0; |
1c27024e | 2324 | for (int c = 0; c < ZIO_CHILD_TYPES; c++) |
b128c09f | 2325 | pio->io_child_error[c] = 0; |
34dc7c2f | 2326 | |
428870ff BB |
2327 | if (IO_IS_ALLOCATING(pio)) |
2328 | BP_ZERO(pio->io_bp); | |
34dc7c2f | 2329 | |
b128c09f BB |
2330 | /* |
2331 | * As we reexecute pio's children, new children could be created. | |
d164b209 | 2332 | * New children go to the head of pio's io_child_list, however, |
b128c09f | 2333 | * so we will (correctly) not reexecute them. The key is that |
d164b209 BB |
2334 | * the remainder of pio's io_child_list, from 'cio_next' onward, |
2335 | * cannot be affected by any side effects of reexecuting 'cio'. | |
b128c09f | 2336 | */ |
1c27024e | 2337 | zio_link_t *zl = NULL; |
a8b2e306 | 2338 | mutex_enter(&pio->io_lock); |
3dfb57a3 DB |
2339 | for (cio = zio_walk_children(pio, &zl); cio != NULL; cio = cio_next) { |
2340 | cio_next = zio_walk_children(pio, &zl); | |
1c27024e | 2341 | for (int w = 0; w < ZIO_WAIT_TYPES; w++) |
d164b209 | 2342 | pio->io_children[cio->io_child_type][w]++; |
b128c09f | 2343 | mutex_exit(&pio->io_lock); |
d164b209 | 2344 | zio_reexecute(cio); |
a8b2e306 | 2345 | mutex_enter(&pio->io_lock); |
34dc7c2f | 2346 | } |
a8b2e306 | 2347 | mutex_exit(&pio->io_lock); |
34dc7c2f | 2348 | |
b128c09f BB |
2349 | /* |
2350 | * Now that all children have been reexecuted, execute the parent. | |
9babb374 | 2351 | * We don't reexecute "The Godfather" I/O here as it's the |
9e2c3bb4 | 2352 | * responsibility of the caller to wait on it. |
b128c09f | 2353 | */ |
3dfb57a3 DB |
2354 | if (!(pio->io_flags & ZIO_FLAG_GODFATHER)) { |
2355 | pio->io_queued_timestamp = gethrtime(); | |
da6b4005 | 2356 | __zio_execute(pio); |
3dfb57a3 | 2357 | } |
34dc7c2f BB |
2358 | } |
2359 | ||
b128c09f | 2360 | void |
cec3a0a1 | 2361 | zio_suspend(spa_t *spa, zio_t *zio, zio_suspend_reason_t reason) |
34dc7c2f | 2362 | { |
b128c09f BB |
2363 | if (spa_get_failmode(spa) == ZIO_FAILURE_MODE_PANIC) |
2364 | fm_panic("Pool '%s' has encountered an uncorrectable I/O " | |
2365 | "failure and the failure mode property for this pool " | |
2366 | "is set to panic.", spa_name(spa)); | |
34dc7c2f | 2367 | |
bf89c199 BB |
2368 | cmn_err(CE_WARN, "Pool '%s' has encountered an uncorrectable I/O " |
2369 | "failure and has been suspended.\n", spa_name(spa)); | |
2370 | ||
1144586b | 2371 | (void) zfs_ereport_post(FM_EREPORT_ZFS_IO_FAILURE, spa, NULL, |
4f072827 | 2372 | NULL, NULL, 0); |
34dc7c2f | 2373 | |
b128c09f | 2374 | mutex_enter(&spa->spa_suspend_lock); |
34dc7c2f | 2375 | |
b128c09f | 2376 | if (spa->spa_suspend_zio_root == NULL) |
9babb374 BB |
2377 | spa->spa_suspend_zio_root = zio_root(spa, NULL, NULL, |
2378 | ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE | | |
2379 | ZIO_FLAG_GODFATHER); | |
34dc7c2f | 2380 | |
cec3a0a1 | 2381 | spa->spa_suspended = reason; |
34dc7c2f | 2382 | |
b128c09f | 2383 | if (zio != NULL) { |
9babb374 | 2384 | ASSERT(!(zio->io_flags & ZIO_FLAG_GODFATHER)); |
b128c09f BB |
2385 | ASSERT(zio != spa->spa_suspend_zio_root); |
2386 | ASSERT(zio->io_child_type == ZIO_CHILD_LOGICAL); | |
d164b209 | 2387 | ASSERT(zio_unique_parent(zio) == NULL); |
b128c09f BB |
2388 | ASSERT(zio->io_stage == ZIO_STAGE_DONE); |
2389 | zio_add_child(spa->spa_suspend_zio_root, zio); | |
2390 | } | |
34dc7c2f | 2391 | |
b128c09f BB |
2392 | mutex_exit(&spa->spa_suspend_lock); |
2393 | } | |
34dc7c2f | 2394 | |
9babb374 | 2395 | int |
b128c09f BB |
2396 | zio_resume(spa_t *spa) |
2397 | { | |
9babb374 | 2398 | zio_t *pio; |
34dc7c2f BB |
2399 | |
2400 | /* | |
b128c09f | 2401 | * Reexecute all previously suspended i/o. |
34dc7c2f | 2402 | */ |
b128c09f | 2403 | mutex_enter(&spa->spa_suspend_lock); |
cec3a0a1 | 2404 | spa->spa_suspended = ZIO_SUSPEND_NONE; |
b128c09f BB |
2405 | cv_broadcast(&spa->spa_suspend_cv); |
2406 | pio = spa->spa_suspend_zio_root; | |
2407 | spa->spa_suspend_zio_root = NULL; | |
2408 | mutex_exit(&spa->spa_suspend_lock); | |
2409 | ||
2410 | if (pio == NULL) | |
9babb374 | 2411 | return (0); |
34dc7c2f | 2412 | |
9babb374 BB |
2413 | zio_reexecute(pio); |
2414 | return (zio_wait(pio)); | |
b128c09f BB |
2415 | } |
2416 | ||
2417 | void | |
2418 | zio_resume_wait(spa_t *spa) | |
2419 | { | |
2420 | mutex_enter(&spa->spa_suspend_lock); | |
2421 | while (spa_suspended(spa)) | |
2422 | cv_wait(&spa->spa_suspend_cv, &spa->spa_suspend_lock); | |
2423 | mutex_exit(&spa->spa_suspend_lock); | |
34dc7c2f BB |
2424 | } |
2425 | ||
2426 | /* | |
2427 | * ========================================================================== | |
b128c09f BB |
2428 | * Gang blocks. |
2429 | * | |
2430 | * A gang block is a collection of small blocks that looks to the DMU | |
2431 | * like one large block. When zio_dva_allocate() cannot find a block | |
2432 | * of the requested size, due to either severe fragmentation or the pool | |
2433 | * being nearly full, it calls zio_write_gang_block() to construct the | |
2434 | * block from smaller fragments. | |
2435 | * | |
2436 | * A gang block consists of a gang header (zio_gbh_phys_t) and up to | |
2437 | * three (SPA_GBH_NBLKPTRS) gang members. The gang header is just like | |
2438 | * an indirect block: it's an array of block pointers. It consumes | |
2439 | * only one sector and hence is allocatable regardless of fragmentation. | |
2440 | * The gang header's bps point to its gang members, which hold the data. | |
2441 | * | |
2442 | * Gang blocks are self-checksumming, using the bp's <vdev, offset, txg> | |
2443 | * as the verifier to ensure uniqueness of the SHA256 checksum. | |
2444 | * Critically, the gang block bp's blk_cksum is the checksum of the data, | |
2445 | * not the gang header. This ensures that data block signatures (needed for | |
2446 | * deduplication) are independent of how the block is physically stored. | |
2447 | * | |
2448 | * Gang blocks can be nested: a gang member may itself be a gang block. | |
2449 | * Thus every gang block is a tree in which root and all interior nodes are | |
2450 | * gang headers, and the leaves are normal blocks that contain user data. | |
2451 | * The root of the gang tree is called the gang leader. | |
2452 | * | |
2453 | * To perform any operation (read, rewrite, free, claim) on a gang block, | |
2454 | * zio_gang_assemble() first assembles the gang tree (minus data leaves) | |
2455 | * in the io_gang_tree field of the original logical i/o by recursively | |
2456 | * reading the gang leader and all gang headers below it. This yields | |
2457 | * an in-core tree containing the contents of every gang header and the | |
2458 | * bps for every constituent of the gang block. | |
2459 | * | |
2460 | * With the gang tree now assembled, zio_gang_issue() just walks the gang tree | |
2461 | * and invokes a callback on each bp. To free a gang block, zio_gang_issue() | |
2462 | * calls zio_free_gang() -- a trivial wrapper around zio_free() -- for each bp. | |
2463 | * zio_claim_gang() provides a similarly trivial wrapper for zio_claim(). | |
2464 | * zio_read_gang() is a wrapper around zio_read() that omits reading gang | |
2465 | * headers, since we already have those in io_gang_tree. zio_rewrite_gang() | |
2466 | * performs a zio_rewrite() of the data or, for gang headers, a zio_rewrite() | |
2467 | * of the gang header plus zio_checksum_compute() of the data to update the | |
2468 | * gang header's blk_cksum as described above. | |
2469 | * | |
2470 | * The two-phase assemble/issue model solves the problem of partial failure -- | |
2471 | * what if you'd freed part of a gang block but then couldn't read the | |
2472 | * gang header for another part? Assembling the entire gang tree first | |
2473 | * ensures that all the necessary gang header I/O has succeeded before | |
2474 | * starting the actual work of free, claim, or write. Once the gang tree | |
2475 | * is assembled, free and claim are in-memory operations that cannot fail. | |
2476 | * | |
2477 | * In the event that a gang write fails, zio_dva_unallocate() walks the | |
2478 | * gang tree to immediately free (i.e. insert back into the space map) | |
2479 | * everything we've allocated. This ensures that we don't get ENOSPC | |
2480 | * errors during repeated suspend/resume cycles due to a flaky device. | |
2481 | * | |
2482 | * Gang rewrites only happen during sync-to-convergence. If we can't assemble | |
2483 | * the gang tree, we won't modify the block, so we can safely defer the free | |
2484 | * (knowing that the block is still intact). If we *can* assemble the gang | |
2485 | * tree, then even if some of the rewrites fail, zio_dva_unallocate() will free | |
2486 | * each constituent bp and we can allocate a new block on the next sync pass. | |
2487 | * | |
2488 | * In all cases, the gang tree allows complete recovery from partial failure. | |
34dc7c2f BB |
2489 | * ========================================================================== |
2490 | */ | |
b128c09f | 2491 | |
a6255b7f DQ |
2492 | static void |
2493 | zio_gang_issue_func_done(zio_t *zio) | |
2494 | { | |
e2af2acc | 2495 | abd_free(zio->io_abd); |
a6255b7f DQ |
2496 | } |
2497 | ||
b128c09f | 2498 | static zio_t * |
a6255b7f DQ |
2499 | zio_read_gang(zio_t *pio, blkptr_t *bp, zio_gang_node_t *gn, abd_t *data, |
2500 | uint64_t offset) | |
34dc7c2f | 2501 | { |
b128c09f BB |
2502 | if (gn != NULL) |
2503 | return (pio); | |
34dc7c2f | 2504 | |
a6255b7f DQ |
2505 | return (zio_read(pio, pio->io_spa, bp, abd_get_offset(data, offset), |
2506 | BP_GET_PSIZE(bp), zio_gang_issue_func_done, | |
2507 | NULL, pio->io_priority, ZIO_GANG_CHILD_FLAGS(pio), | |
b128c09f BB |
2508 | &pio->io_bookmark)); |
2509 | } | |
2510 | ||
a6255b7f DQ |
2511 | static zio_t * |
2512 | zio_rewrite_gang(zio_t *pio, blkptr_t *bp, zio_gang_node_t *gn, abd_t *data, | |
2513 | uint64_t offset) | |
b128c09f BB |
2514 | { |
2515 | zio_t *zio; | |
2516 | ||
2517 | if (gn != NULL) { | |
a6255b7f DQ |
2518 | abd_t *gbh_abd = |
2519 | abd_get_from_buf(gn->gn_gbh, SPA_GANGBLOCKSIZE); | |
b128c09f | 2520 | zio = zio_rewrite(pio, pio->io_spa, pio->io_txg, bp, |
a6255b7f DQ |
2521 | gbh_abd, SPA_GANGBLOCKSIZE, zio_gang_issue_func_done, NULL, |
2522 | pio->io_priority, ZIO_GANG_CHILD_FLAGS(pio), | |
2523 | &pio->io_bookmark); | |
34dc7c2f | 2524 | /* |
b128c09f BB |
2525 | * As we rewrite each gang header, the pipeline will compute |
2526 | * a new gang block header checksum for it; but no one will | |
2527 | * compute a new data checksum, so we do that here. The one | |
2528 | * exception is the gang leader: the pipeline already computed | |
2529 | * its data checksum because that stage precedes gang assembly. | |
2530 | * (Presently, nothing actually uses interior data checksums; | |
2531 | * this is just good hygiene.) | |
34dc7c2f | 2532 | */ |
9babb374 | 2533 | if (gn != pio->io_gang_leader->io_gang_tree) { |
a6255b7f DQ |
2534 | abd_t *buf = abd_get_offset(data, offset); |
2535 | ||
b128c09f | 2536 | zio_checksum_compute(zio, BP_GET_CHECKSUM(bp), |
a6255b7f DQ |
2537 | buf, BP_GET_PSIZE(bp)); |
2538 | ||
e2af2acc | 2539 | abd_free(buf); |
b128c09f | 2540 | } |
428870ff BB |
2541 | /* |
2542 | * If we are here to damage data for testing purposes, | |
2543 | * leave the GBH alone so that we can detect the damage. | |
2544 | */ | |
2545 | if (pio->io_gang_leader->io_flags & ZIO_FLAG_INDUCE_DAMAGE) | |
2546 | zio->io_pipeline &= ~ZIO_VDEV_IO_STAGES; | |
34dc7c2f | 2547 | } else { |
b128c09f | 2548 | zio = zio_rewrite(pio, pio->io_spa, pio->io_txg, bp, |
a6255b7f DQ |
2549 | abd_get_offset(data, offset), BP_GET_PSIZE(bp), |
2550 | zio_gang_issue_func_done, NULL, pio->io_priority, | |
b128c09f | 2551 | ZIO_GANG_CHILD_FLAGS(pio), &pio->io_bookmark); |
34dc7c2f BB |
2552 | } |
2553 | ||
b128c09f BB |
2554 | return (zio); |
2555 | } | |
34dc7c2f | 2556 | |
a6255b7f DQ |
2557 | static zio_t * |
2558 | zio_free_gang(zio_t *pio, blkptr_t *bp, zio_gang_node_t *gn, abd_t *data, | |
2559 | uint64_t offset) | |
b128c09f | 2560 | { |
14e4e3cb AZ |
2561 | (void) gn, (void) data, (void) offset; |
2562 | ||
9cdf7b1f MA |
2563 | zio_t *zio = zio_free_sync(pio, pio->io_spa, pio->io_txg, bp, |
2564 | ZIO_GANG_CHILD_FLAGS(pio)); | |
2565 | if (zio == NULL) { | |
2566 | zio = zio_null(pio, pio->io_spa, | |
2567 | NULL, NULL, NULL, ZIO_GANG_CHILD_FLAGS(pio)); | |
2568 | } | |
2569 | return (zio); | |
34dc7c2f BB |
2570 | } |
2571 | ||
a6255b7f DQ |
2572 | static zio_t * |
2573 | zio_claim_gang(zio_t *pio, blkptr_t *bp, zio_gang_node_t *gn, abd_t *data, | |
2574 | uint64_t offset) | |
34dc7c2f | 2575 | { |
14e4e3cb | 2576 | (void) gn, (void) data, (void) offset; |
b128c09f BB |
2577 | return (zio_claim(pio, pio->io_spa, pio->io_txg, bp, |
2578 | NULL, NULL, ZIO_GANG_CHILD_FLAGS(pio))); | |
2579 | } | |
2580 | ||
2581 | static zio_gang_issue_func_t *zio_gang_issue_func[ZIO_TYPES] = { | |
2582 | NULL, | |
2583 | zio_read_gang, | |
2584 | zio_rewrite_gang, | |
2585 | zio_free_gang, | |
2586 | zio_claim_gang, | |
2587 | NULL | |
2588 | }; | |
34dc7c2f | 2589 | |
b128c09f | 2590 | static void zio_gang_tree_assemble_done(zio_t *zio); |
34dc7c2f | 2591 | |
b128c09f BB |
2592 | static zio_gang_node_t * |
2593 | zio_gang_node_alloc(zio_gang_node_t **gnpp) | |
2594 | { | |
2595 | zio_gang_node_t *gn; | |
34dc7c2f | 2596 | |
b128c09f | 2597 | ASSERT(*gnpp == NULL); |
34dc7c2f | 2598 | |
79c76d5b | 2599 | gn = kmem_zalloc(sizeof (*gn), KM_SLEEP); |
b128c09f BB |
2600 | gn->gn_gbh = zio_buf_alloc(SPA_GANGBLOCKSIZE); |
2601 | *gnpp = gn; | |
34dc7c2f | 2602 | |
b128c09f | 2603 | return (gn); |
34dc7c2f BB |
2604 | } |
2605 | ||
34dc7c2f | 2606 | static void |
b128c09f | 2607 | zio_gang_node_free(zio_gang_node_t **gnpp) |
34dc7c2f | 2608 | { |
b128c09f | 2609 | zio_gang_node_t *gn = *gnpp; |
34dc7c2f | 2610 | |
1c27024e | 2611 | for (int g = 0; g < SPA_GBH_NBLKPTRS; g++) |
b128c09f BB |
2612 | ASSERT(gn->gn_child[g] == NULL); |
2613 | ||
2614 | zio_buf_free(gn->gn_gbh, SPA_GANGBLOCKSIZE); | |
2615 | kmem_free(gn, sizeof (*gn)); | |
2616 | *gnpp = NULL; | |
34dc7c2f BB |
2617 | } |
2618 | ||
b128c09f BB |
2619 | static void |
2620 | zio_gang_tree_free(zio_gang_node_t **gnpp) | |
34dc7c2f | 2621 | { |
b128c09f | 2622 | zio_gang_node_t *gn = *gnpp; |
34dc7c2f | 2623 | |
b128c09f BB |
2624 | if (gn == NULL) |
2625 | return; | |
34dc7c2f | 2626 | |
1c27024e | 2627 | for (int g = 0; g < SPA_GBH_NBLKPTRS; g++) |
b128c09f | 2628 | zio_gang_tree_free(&gn->gn_child[g]); |
34dc7c2f | 2629 | |
b128c09f | 2630 | zio_gang_node_free(gnpp); |
34dc7c2f BB |
2631 | } |
2632 | ||
b128c09f | 2633 | static void |
9babb374 | 2634 | zio_gang_tree_assemble(zio_t *gio, blkptr_t *bp, zio_gang_node_t **gnpp) |
34dc7c2f | 2635 | { |
b128c09f | 2636 | zio_gang_node_t *gn = zio_gang_node_alloc(gnpp); |
a6255b7f | 2637 | abd_t *gbh_abd = abd_get_from_buf(gn->gn_gbh, SPA_GANGBLOCKSIZE); |
b128c09f | 2638 | |
9babb374 | 2639 | ASSERT(gio->io_gang_leader == gio); |
b128c09f | 2640 | ASSERT(BP_IS_GANG(bp)); |
34dc7c2f | 2641 | |
a6255b7f DQ |
2642 | zio_nowait(zio_read(gio, gio->io_spa, bp, gbh_abd, SPA_GANGBLOCKSIZE, |
2643 | zio_gang_tree_assemble_done, gn, gio->io_priority, | |
2644 | ZIO_GANG_CHILD_FLAGS(gio), &gio->io_bookmark)); | |
b128c09f | 2645 | } |
34dc7c2f | 2646 | |
b128c09f BB |
2647 | static void |
2648 | zio_gang_tree_assemble_done(zio_t *zio) | |
2649 | { | |
9babb374 | 2650 | zio_t *gio = zio->io_gang_leader; |
b128c09f BB |
2651 | zio_gang_node_t *gn = zio->io_private; |
2652 | blkptr_t *bp = zio->io_bp; | |
34dc7c2f | 2653 | |
9babb374 | 2654 | ASSERT(gio == zio_unique_parent(zio)); |
428870ff | 2655 | ASSERT(zio->io_child_count == 0); |
34dc7c2f | 2656 | |
b128c09f BB |
2657 | if (zio->io_error) |
2658 | return; | |
34dc7c2f | 2659 | |
a6255b7f | 2660 | /* this ABD was created from a linear buf in zio_gang_tree_assemble */ |
b128c09f | 2661 | if (BP_SHOULD_BYTESWAP(bp)) |
a6255b7f | 2662 | byteswap_uint64_array(abd_to_buf(zio->io_abd), zio->io_size); |
34dc7c2f | 2663 | |
a6255b7f | 2664 | ASSERT3P(abd_to_buf(zio->io_abd), ==, gn->gn_gbh); |
b128c09f | 2665 | ASSERT(zio->io_size == SPA_GANGBLOCKSIZE); |
428870ff | 2666 | ASSERT(gn->gn_gbh->zg_tail.zec_magic == ZEC_MAGIC); |
34dc7c2f | 2667 | |
e2af2acc | 2668 | abd_free(zio->io_abd); |
a6255b7f | 2669 | |
1c27024e | 2670 | for (int g = 0; g < SPA_GBH_NBLKPTRS; g++) { |
b128c09f BB |
2671 | blkptr_t *gbp = &gn->gn_gbh->zg_blkptr[g]; |
2672 | if (!BP_IS_GANG(gbp)) | |
2673 | continue; | |
9babb374 | 2674 | zio_gang_tree_assemble(gio, gbp, &gn->gn_child[g]); |
b128c09f | 2675 | } |
34dc7c2f BB |
2676 | } |
2677 | ||
b128c09f | 2678 | static void |
a6255b7f DQ |
2679 | zio_gang_tree_issue(zio_t *pio, zio_gang_node_t *gn, blkptr_t *bp, abd_t *data, |
2680 | uint64_t offset) | |
34dc7c2f | 2681 | { |
9babb374 | 2682 | zio_t *gio = pio->io_gang_leader; |
b128c09f | 2683 | zio_t *zio; |
34dc7c2f | 2684 | |
b128c09f | 2685 | ASSERT(BP_IS_GANG(bp) == !!gn); |
9babb374 BB |
2686 | ASSERT(BP_GET_CHECKSUM(bp) == BP_GET_CHECKSUM(gio->io_bp)); |
2687 | ASSERT(BP_GET_LSIZE(bp) == BP_GET_PSIZE(bp) || gn == gio->io_gang_tree); | |
34dc7c2f | 2688 | |
b128c09f BB |
2689 | /* |
2690 | * If you're a gang header, your data is in gn->gn_gbh. | |
2691 | * If you're a gang member, your data is in 'data' and gn == NULL. | |
2692 | */ | |
a6255b7f | 2693 | zio = zio_gang_issue_func[gio->io_type](pio, bp, gn, data, offset); |
34dc7c2f | 2694 | |
b128c09f | 2695 | if (gn != NULL) { |
428870ff | 2696 | ASSERT(gn->gn_gbh->zg_tail.zec_magic == ZEC_MAGIC); |
34dc7c2f | 2697 | |
1c27024e | 2698 | for (int g = 0; g < SPA_GBH_NBLKPTRS; g++) { |
b128c09f BB |
2699 | blkptr_t *gbp = &gn->gn_gbh->zg_blkptr[g]; |
2700 | if (BP_IS_HOLE(gbp)) | |
2701 | continue; | |
a6255b7f DQ |
2702 | zio_gang_tree_issue(zio, gn->gn_child[g], gbp, data, |
2703 | offset); | |
2704 | offset += BP_GET_PSIZE(gbp); | |
b128c09f | 2705 | } |
34dc7c2f BB |
2706 | } |
2707 | ||
9babb374 | 2708 | if (gn == gio->io_gang_tree) |
a6255b7f | 2709 | ASSERT3U(gio->io_size, ==, offset); |
34dc7c2f | 2710 | |
b128c09f BB |
2711 | if (zio != pio) |
2712 | zio_nowait(zio); | |
34dc7c2f BB |
2713 | } |
2714 | ||
62840030 | 2715 | static zio_t * |
b128c09f | 2716 | zio_gang_assemble(zio_t *zio) |
34dc7c2f | 2717 | { |
b128c09f | 2718 | blkptr_t *bp = zio->io_bp; |
34dc7c2f | 2719 | |
9babb374 BB |
2720 | ASSERT(BP_IS_GANG(bp) && zio->io_gang_leader == NULL); |
2721 | ASSERT(zio->io_child_type > ZIO_CHILD_GANG); | |
2722 | ||
2723 | zio->io_gang_leader = zio; | |
34dc7c2f | 2724 | |
b128c09f | 2725 | zio_gang_tree_assemble(zio, bp, &zio->io_gang_tree); |
34dc7c2f | 2726 | |
62840030 | 2727 | return (zio); |
34dc7c2f BB |
2728 | } |
2729 | ||
62840030 | 2730 | static zio_t * |
b128c09f | 2731 | zio_gang_issue(zio_t *zio) |
34dc7c2f | 2732 | { |
b128c09f | 2733 | blkptr_t *bp = zio->io_bp; |
34dc7c2f | 2734 | |
ddc751d5 | 2735 | if (zio_wait_for_children(zio, ZIO_CHILD_GANG_BIT, ZIO_WAIT_DONE)) { |
62840030 | 2736 | return (NULL); |
ddc751d5 | 2737 | } |
34dc7c2f | 2738 | |
9babb374 BB |
2739 | ASSERT(BP_IS_GANG(bp) && zio->io_gang_leader == zio); |
2740 | ASSERT(zio->io_child_type > ZIO_CHILD_GANG); | |
34dc7c2f | 2741 | |
b128c09f | 2742 | if (zio->io_child_error[ZIO_CHILD_GANG] == 0) |
a6255b7f DQ |
2743 | zio_gang_tree_issue(zio, zio->io_gang_tree, bp, zio->io_abd, |
2744 | 0); | |
b128c09f | 2745 | else |
9babb374 | 2746 | zio_gang_tree_free(&zio->io_gang_tree); |
34dc7c2f | 2747 | |
b128c09f | 2748 | zio->io_pipeline = ZIO_INTERLOCK_PIPELINE; |
34dc7c2f | 2749 | |
62840030 | 2750 | return (zio); |
34dc7c2f BB |
2751 | } |
2752 | ||
2753 | static void | |
b128c09f | 2754 | zio_write_gang_member_ready(zio_t *zio) |
34dc7c2f | 2755 | { |
d164b209 | 2756 | zio_t *pio = zio_unique_parent(zio); |
34dc7c2f BB |
2757 | dva_t *cdva = zio->io_bp->blk_dva; |
2758 | dva_t *pdva = pio->io_bp->blk_dva; | |
2759 | uint64_t asize; | |
2a8ba608 | 2760 | zio_t *gio __maybe_unused = zio->io_gang_leader; |
34dc7c2f | 2761 | |
b128c09f BB |
2762 | if (BP_IS_HOLE(zio->io_bp)) |
2763 | return; | |
2764 | ||
2765 | ASSERT(BP_IS_HOLE(&zio->io_bp_orig)); | |
2766 | ||
2767 | ASSERT(zio->io_child_type == ZIO_CHILD_GANG); | |
428870ff BB |
2768 | ASSERT3U(zio->io_prop.zp_copies, ==, gio->io_prop.zp_copies); |
2769 | ASSERT3U(zio->io_prop.zp_copies, <=, BP_GET_NDVAS(zio->io_bp)); | |
2770 | ASSERT3U(pio->io_prop.zp_copies, <=, BP_GET_NDVAS(pio->io_bp)); | |
34dc7c2f | 2771 | ASSERT3U(BP_GET_NDVAS(zio->io_bp), <=, BP_GET_NDVAS(pio->io_bp)); |
34dc7c2f BB |
2772 | |
2773 | mutex_enter(&pio->io_lock); | |
1c27024e | 2774 | for (int d = 0; d < BP_GET_NDVAS(zio->io_bp); d++) { |
34dc7c2f BB |
2775 | ASSERT(DVA_GET_GANG(&pdva[d])); |
2776 | asize = DVA_GET_ASIZE(&pdva[d]); | |
2777 | asize += DVA_GET_ASIZE(&cdva[d]); | |
2778 | DVA_SET_ASIZE(&pdva[d], asize); | |
2779 | } | |
2780 | mutex_exit(&pio->io_lock); | |
2781 | } | |
2782 | ||
a6255b7f DQ |
2783 | static void |
2784 | zio_write_gang_done(zio_t *zio) | |
2785 | { | |
c955398b BL |
2786 | /* |
2787 | * The io_abd field will be NULL for a zio with no data. The io_flags | |
2788 | * will initially have the ZIO_FLAG_NODATA bit flag set, but we can't | |
2789 | * check for it here as it is cleared in zio_ready. | |
2790 | */ | |
2791 | if (zio->io_abd != NULL) | |
e2af2acc | 2792 | abd_free(zio->io_abd); |
a6255b7f DQ |
2793 | } |
2794 | ||
62840030 | 2795 | static zio_t * |
aa755b35 | 2796 | zio_write_gang_block(zio_t *pio, metaslab_class_t *mc) |
34dc7c2f | 2797 | { |
b128c09f BB |
2798 | spa_t *spa = pio->io_spa; |
2799 | blkptr_t *bp = pio->io_bp; | |
9babb374 | 2800 | zio_t *gio = pio->io_gang_leader; |
b128c09f BB |
2801 | zio_t *zio; |
2802 | zio_gang_node_t *gn, **gnpp; | |
34dc7c2f | 2803 | zio_gbh_phys_t *gbh; |
a6255b7f | 2804 | abd_t *gbh_abd; |
b128c09f BB |
2805 | uint64_t txg = pio->io_txg; |
2806 | uint64_t resid = pio->io_size; | |
2807 | uint64_t lsize; | |
428870ff | 2808 | int copies = gio->io_prop.zp_copies; |
b5256303 | 2809 | int gbh_copies; |
b128c09f | 2810 | zio_prop_t zp; |
1c27024e | 2811 | int error; |
c955398b | 2812 | boolean_t has_data = !(pio->io_flags & ZIO_FLAG_NODATA); |
b5256303 TC |
2813 | |
2814 | /* | |
2815 | * encrypted blocks need DVA[2] free so encrypted gang headers can't | |
2816 | * have a third copy. | |
2817 | */ | |
2818 | gbh_copies = MIN(copies + 1, spa_max_replication(spa)); | |
2819 | if (gio->io_prop.zp_encrypt && gbh_copies >= SPA_DVAS_PER_BP) | |
2820 | gbh_copies = SPA_DVAS_PER_BP - 1; | |
2821 | ||
1c27024e | 2822 | int flags = METASLAB_HINTBP_FAVOR | METASLAB_GANG_HEADER; |
3dfb57a3 DB |
2823 | if (pio->io_flags & ZIO_FLAG_IO_ALLOCATING) { |
2824 | ASSERT(pio->io_priority == ZIO_PRIORITY_ASYNC_WRITE); | |
c955398b | 2825 | ASSERT(has_data); |
3dfb57a3 DB |
2826 | |
2827 | flags |= METASLAB_ASYNC_ALLOC; | |
f8020c93 AM |
2828 | VERIFY(zfs_refcount_held(&mc->mc_allocator[pio->io_allocator]. |
2829 | mca_alloc_slots, pio)); | |
3dfb57a3 DB |
2830 | |
2831 | /* | |
2832 | * The logical zio has already placed a reservation for | |
2833 | * 'copies' allocation slots but gang blocks may require | |
2834 | * additional copies. These additional copies | |
2835 | * (i.e. gbh_copies - copies) are guaranteed to succeed | |
2836 | * since metaslab_class_throttle_reserve() always allows | |
2837 | * additional reservations for gang blocks. | |
2838 | */ | |
2839 | VERIFY(metaslab_class_throttle_reserve(mc, gbh_copies - copies, | |
492f64e9 | 2840 | pio->io_allocator, pio, flags)); |
3dfb57a3 DB |
2841 | } |
2842 | ||
2843 | error = metaslab_alloc(spa, mc, SPA_GANGBLOCKSIZE, | |
4e21fd06 | 2844 | bp, gbh_copies, txg, pio == gio ? NULL : gio->io_bp, flags, |
492f64e9 | 2845 | &pio->io_alloc_list, pio, pio->io_allocator); |
34dc7c2f | 2846 | if (error) { |
3dfb57a3 DB |
2847 | if (pio->io_flags & ZIO_FLAG_IO_ALLOCATING) { |
2848 | ASSERT(pio->io_priority == ZIO_PRIORITY_ASYNC_WRITE); | |
c955398b | 2849 | ASSERT(has_data); |
3dfb57a3 DB |
2850 | |
2851 | /* | |
2852 | * If we failed to allocate the gang block header then | |
2853 | * we remove any additional allocation reservations that | |
2854 | * we placed here. The original reservation will | |
2855 | * be removed when the logical I/O goes to the ready | |
2856 | * stage. | |
2857 | */ | |
2858 | metaslab_class_throttle_unreserve(mc, | |
492f64e9 | 2859 | gbh_copies - copies, pio->io_allocator, pio); |
3dfb57a3 DB |
2860 | } |
2861 | ||
b128c09f | 2862 | pio->io_error = error; |
62840030 | 2863 | return (pio); |
34dc7c2f BB |
2864 | } |
2865 | ||
9babb374 BB |
2866 | if (pio == gio) { |
2867 | gnpp = &gio->io_gang_tree; | |
b128c09f BB |
2868 | } else { |
2869 | gnpp = pio->io_private; | |
2870 | ASSERT(pio->io_ready == zio_write_gang_member_ready); | |
34dc7c2f BB |
2871 | } |
2872 | ||
b128c09f BB |
2873 | gn = zio_gang_node_alloc(gnpp); |
2874 | gbh = gn->gn_gbh; | |
861166b0 | 2875 | memset(gbh, 0, SPA_GANGBLOCKSIZE); |
a6255b7f | 2876 | gbh_abd = abd_get_from_buf(gbh, SPA_GANGBLOCKSIZE); |
34dc7c2f | 2877 | |
b128c09f BB |
2878 | /* |
2879 | * Create the gang header. | |
2880 | */ | |
a6255b7f DQ |
2881 | zio = zio_rewrite(pio, spa, txg, bp, gbh_abd, SPA_GANGBLOCKSIZE, |
2882 | zio_write_gang_done, NULL, pio->io_priority, | |
2883 | ZIO_GANG_CHILD_FLAGS(pio), &pio->io_bookmark); | |
34dc7c2f | 2884 | |
b128c09f BB |
2885 | /* |
2886 | * Create and nowait the gang children. | |
2887 | */ | |
1c27024e | 2888 | for (int g = 0; resid != 0; resid -= lsize, g++) { |
b128c09f BB |
2889 | lsize = P2ROUNDUP(resid / (SPA_GBH_NBLKPTRS - g), |
2890 | SPA_MINBLOCKSIZE); | |
2891 | ASSERT(lsize >= SPA_MINBLOCKSIZE && lsize <= resid); | |
2892 | ||
9babb374 | 2893 | zp.zp_checksum = gio->io_prop.zp_checksum; |
b128c09f | 2894 | zp.zp_compress = ZIO_COMPRESS_OFF; |
10b3c7f5 | 2895 | zp.zp_complevel = gio->io_prop.zp_complevel; |
b128c09f BB |
2896 | zp.zp_type = DMU_OT_NONE; |
2897 | zp.zp_level = 0; | |
428870ff | 2898 | zp.zp_copies = gio->io_prop.zp_copies; |
03c6040b GW |
2899 | zp.zp_dedup = B_FALSE; |
2900 | zp.zp_dedup_verify = B_FALSE; | |
2901 | zp.zp_nopwrite = B_FALSE; | |
4807c0ba TC |
2902 | zp.zp_encrypt = gio->io_prop.zp_encrypt; |
2903 | zp.zp_byteorder = gio->io_prop.zp_byteorder; | |
861166b0 AZ |
2904 | memset(zp.zp_salt, 0, ZIO_DATA_SALT_LEN); |
2905 | memset(zp.zp_iv, 0, ZIO_DATA_IV_LEN); | |
2906 | memset(zp.zp_mac, 0, ZIO_DATA_MAC_LEN); | |
b128c09f | 2907 | |
1c27024e | 2908 | zio_t *cio = zio_write(zio, spa, txg, &gbh->zg_blkptr[g], |
c955398b BL |
2909 | has_data ? abd_get_offset(pio->io_abd, pio->io_size - |
2910 | resid) : NULL, lsize, lsize, &zp, | |
2911 | zio_write_gang_member_ready, NULL, NULL, | |
a6255b7f | 2912 | zio_write_gang_done, &gn->gn_child[g], pio->io_priority, |
3dfb57a3 DB |
2913 | ZIO_GANG_CHILD_FLAGS(pio), &pio->io_bookmark); |
2914 | ||
2915 | if (pio->io_flags & ZIO_FLAG_IO_ALLOCATING) { | |
2916 | ASSERT(pio->io_priority == ZIO_PRIORITY_ASYNC_WRITE); | |
c955398b | 2917 | ASSERT(has_data); |
3dfb57a3 DB |
2918 | |
2919 | /* | |
2920 | * Gang children won't throttle but we should | |
2921 | * account for their work, so reserve an allocation | |
2922 | * slot for them here. | |
2923 | */ | |
2924 | VERIFY(metaslab_class_throttle_reserve(mc, | |
492f64e9 | 2925 | zp.zp_copies, cio->io_allocator, cio, flags)); |
3dfb57a3 DB |
2926 | } |
2927 | zio_nowait(cio); | |
b128c09f | 2928 | } |
34dc7c2f BB |
2929 | |
2930 | /* | |
b128c09f | 2931 | * Set pio's pipeline to just wait for zio to finish. |
34dc7c2f | 2932 | */ |
b128c09f BB |
2933 | pio->io_pipeline = ZIO_INTERLOCK_PIPELINE; |
2934 | ||
920dd524 ED |
2935 | /* |
2936 | * We didn't allocate this bp, so make sure it doesn't get unmarked. | |
2937 | */ | |
2938 | pio->io_flags &= ~ZIO_FLAG_FASTWRITE; | |
2939 | ||
b128c09f BB |
2940 | zio_nowait(zio); |
2941 | ||
62840030 | 2942 | return (pio); |
34dc7c2f BB |
2943 | } |
2944 | ||
03c6040b | 2945 | /* |
3c67d83a TH |
2946 | * The zio_nop_write stage in the pipeline determines if allocating a |
2947 | * new bp is necessary. The nopwrite feature can handle writes in | |
2948 | * either syncing or open context (i.e. zil writes) and as a result is | |
2949 | * mutually exclusive with dedup. | |
2950 | * | |
2951 | * By leveraging a cryptographically secure checksum, such as SHA256, we | |
2952 | * can compare the checksums of the new data and the old to determine if | |
2953 | * allocating a new block is required. Note that our requirements for | |
2954 | * cryptographic strength are fairly weak: there can't be any accidental | |
2955 | * hash collisions, but we don't need to be secure against intentional | |
2956 | * (malicious) collisions. To trigger a nopwrite, you have to be able | |
2957 | * to write the file to begin with, and triggering an incorrect (hash | |
2958 | * collision) nopwrite is no worse than simply writing to the file. | |
2959 | * That said, there are no known attacks against the checksum algorithms | |
2960 | * used for nopwrite, assuming that the salt and the checksums | |
2961 | * themselves remain secret. | |
03c6040b | 2962 | */ |
62840030 | 2963 | static zio_t * |
03c6040b GW |
2964 | zio_nop_write(zio_t *zio) |
2965 | { | |
2966 | blkptr_t *bp = zio->io_bp; | |
2967 | blkptr_t *bp_orig = &zio->io_bp_orig; | |
2968 | zio_prop_t *zp = &zio->io_prop; | |
2969 | ||
2970 | ASSERT(BP_GET_LEVEL(bp) == 0); | |
2971 | ASSERT(!(zio->io_flags & ZIO_FLAG_IO_REWRITE)); | |
2972 | ASSERT(zp->zp_nopwrite); | |
2973 | ASSERT(!zp->zp_dedup); | |
2974 | ASSERT(zio->io_bp_override == NULL); | |
2975 | ASSERT(IO_IS_ALLOCATING(zio)); | |
2976 | ||
2977 | /* | |
2978 | * Check to see if the original bp and the new bp have matching | |
2979 | * characteristics (i.e. same checksum, compression algorithms, etc). | |
2980 | * If they don't then just continue with the pipeline which will | |
2981 | * allocate a new bp. | |
2982 | */ | |
2983 | if (BP_IS_HOLE(bp_orig) || | |
3c67d83a TH |
2984 | !(zio_checksum_table[BP_GET_CHECKSUM(bp)].ci_flags & |
2985 | ZCHECKSUM_FLAG_NOPWRITE) || | |
b5256303 | 2986 | BP_IS_ENCRYPTED(bp) || BP_IS_ENCRYPTED(bp_orig) || |
03c6040b GW |
2987 | BP_GET_CHECKSUM(bp) != BP_GET_CHECKSUM(bp_orig) || |
2988 | BP_GET_COMPRESS(bp) != BP_GET_COMPRESS(bp_orig) || | |
2989 | BP_GET_DEDUP(bp) != BP_GET_DEDUP(bp_orig) || | |
2990 | zp->zp_copies != BP_GET_NDVAS(bp_orig)) | |
62840030 | 2991 | return (zio); |
03c6040b GW |
2992 | |
2993 | /* | |
2994 | * If the checksums match then reset the pipeline so that we | |
2995 | * avoid allocating a new bp and issuing any I/O. | |
2996 | */ | |
2997 | if (ZIO_CHECKSUM_EQUAL(bp->blk_cksum, bp_orig->blk_cksum)) { | |
3c67d83a TH |
2998 | ASSERT(zio_checksum_table[zp->zp_checksum].ci_flags & |
2999 | ZCHECKSUM_FLAG_NOPWRITE); | |
03c6040b GW |
3000 | ASSERT3U(BP_GET_PSIZE(bp), ==, BP_GET_PSIZE(bp_orig)); |
3001 | ASSERT3U(BP_GET_LSIZE(bp), ==, BP_GET_LSIZE(bp_orig)); | |
3002 | ASSERT(zp->zp_compress != ZIO_COMPRESS_OFF); | |
861166b0 | 3003 | ASSERT(memcmp(&bp->blk_prop, &bp_orig->blk_prop, |
03c6040b GW |
3004 | sizeof (uint64_t)) == 0); |
3005 | ||
681a85cb GW |
3006 | /* |
3007 | * If we're overwriting a block that is currently on an | |
3008 | * indirect vdev, then ignore the nopwrite request and | |
3009 | * allow a new block to be allocated on a concrete vdev. | |
3010 | */ | |
3011 | spa_config_enter(zio->io_spa, SCL_VDEV, FTAG, RW_READER); | |
3012 | vdev_t *tvd = vdev_lookup_top(zio->io_spa, | |
3013 | DVA_GET_VDEV(&bp->blk_dva[0])); | |
3014 | if (tvd->vdev_ops == &vdev_indirect_ops) { | |
3015 | spa_config_exit(zio->io_spa, SCL_VDEV, FTAG); | |
3016 | return (zio); | |
3017 | } | |
3018 | spa_config_exit(zio->io_spa, SCL_VDEV, FTAG); | |
3019 | ||
03c6040b GW |
3020 | *bp = *bp_orig; |
3021 | zio->io_pipeline = ZIO_INTERLOCK_PIPELINE; | |
3022 | zio->io_flags |= ZIO_FLAG_NOPWRITE; | |
3023 | } | |
3024 | ||
62840030 | 3025 | return (zio); |
03c6040b GW |
3026 | } |
3027 | ||
34dc7c2f BB |
3028 | /* |
3029 | * ========================================================================== | |
428870ff | 3030 | * Dedup |
34dc7c2f BB |
3031 | * ========================================================================== |
3032 | */ | |
428870ff BB |
3033 | static void |
3034 | zio_ddt_child_read_done(zio_t *zio) | |
3035 | { | |
3036 | blkptr_t *bp = zio->io_bp; | |
3037 | ddt_entry_t *dde = zio->io_private; | |
3038 | ddt_phys_t *ddp; | |
3039 | zio_t *pio = zio_unique_parent(zio); | |
3040 | ||
3041 | mutex_enter(&pio->io_lock); | |
3042 | ddp = ddt_phys_select(dde, bp); | |
3043 | if (zio->io_error == 0) | |
3044 | ddt_phys_clear(ddp); /* this ddp doesn't need repair */ | |
a6255b7f DQ |
3045 | |
3046 | if (zio->io_error == 0 && dde->dde_repair_abd == NULL) | |
3047 | dde->dde_repair_abd = zio->io_abd; | |
428870ff | 3048 | else |
a6255b7f | 3049 | abd_free(zio->io_abd); |
428870ff BB |
3050 | mutex_exit(&pio->io_lock); |
3051 | } | |
3052 | ||
62840030 | 3053 | static zio_t * |
428870ff BB |
3054 | zio_ddt_read_start(zio_t *zio) |
3055 | { | |
3056 | blkptr_t *bp = zio->io_bp; | |
3057 | ||
3058 | ASSERT(BP_GET_DEDUP(bp)); | |
3059 | ASSERT(BP_GET_PSIZE(bp) == zio->io_size); | |
3060 | ASSERT(zio->io_child_type == ZIO_CHILD_LOGICAL); | |
3061 | ||
3062 | if (zio->io_child_error[ZIO_CHILD_DDT]) { | |
3063 | ddt_t *ddt = ddt_select(zio->io_spa, bp); | |
3064 | ddt_entry_t *dde = ddt_repair_start(ddt, bp); | |
3065 | ddt_phys_t *ddp = dde->dde_phys; | |
3066 | ddt_phys_t *ddp_self = ddt_phys_select(dde, bp); | |
3067 | blkptr_t blk; | |
3068 | ||
3069 | ASSERT(zio->io_vsd == NULL); | |
3070 | zio->io_vsd = dde; | |
3071 | ||
3072 | if (ddp_self == NULL) | |
62840030 | 3073 | return (zio); |
428870ff | 3074 | |
1c27024e | 3075 | for (int p = 0; p < DDT_PHYS_TYPES; p++, ddp++) { |
428870ff BB |
3076 | if (ddp->ddp_phys_birth == 0 || ddp == ddp_self) |
3077 | continue; | |
3078 | ddt_bp_create(ddt->ddt_checksum, &dde->dde_key, ddp, | |
3079 | &blk); | |
3080 | zio_nowait(zio_read(zio, zio->io_spa, &blk, | |
a6255b7f DQ |
3081 | abd_alloc_for_io(zio->io_size, B_TRUE), |
3082 | zio->io_size, zio_ddt_child_read_done, dde, | |
3083 | zio->io_priority, ZIO_DDT_CHILD_FLAGS(zio) | | |
3084 | ZIO_FLAG_DONT_PROPAGATE, &zio->io_bookmark)); | |
428870ff | 3085 | } |
62840030 | 3086 | return (zio); |
428870ff BB |
3087 | } |
3088 | ||
3089 | zio_nowait(zio_read(zio, zio->io_spa, bp, | |
a6255b7f | 3090 | zio->io_abd, zio->io_size, NULL, NULL, zio->io_priority, |
428870ff BB |
3091 | ZIO_DDT_CHILD_FLAGS(zio), &zio->io_bookmark)); |
3092 | ||
62840030 | 3093 | return (zio); |
428870ff BB |
3094 | } |
3095 | ||
62840030 | 3096 | static zio_t * |
428870ff BB |
3097 | zio_ddt_read_done(zio_t *zio) |
3098 | { | |
3099 | blkptr_t *bp = zio->io_bp; | |
3100 | ||
ddc751d5 | 3101 | if (zio_wait_for_children(zio, ZIO_CHILD_DDT_BIT, ZIO_WAIT_DONE)) { |
62840030 | 3102 | return (NULL); |
ddc751d5 | 3103 | } |
428870ff BB |
3104 | |
3105 | ASSERT(BP_GET_DEDUP(bp)); | |
3106 | ASSERT(BP_GET_PSIZE(bp) == zio->io_size); | |
3107 | ASSERT(zio->io_child_type == ZIO_CHILD_LOGICAL); | |
3108 | ||
3109 | if (zio->io_child_error[ZIO_CHILD_DDT]) { | |
3110 | ddt_t *ddt = ddt_select(zio->io_spa, bp); | |
3111 | ddt_entry_t *dde = zio->io_vsd; | |
3112 | if (ddt == NULL) { | |
3113 | ASSERT(spa_load_state(zio->io_spa) != SPA_LOAD_NONE); | |
62840030 | 3114 | return (zio); |
428870ff BB |
3115 | } |
3116 | if (dde == NULL) { | |
3117 | zio->io_stage = ZIO_STAGE_DDT_READ_START >> 1; | |
3118 | zio_taskq_dispatch(zio, ZIO_TASKQ_ISSUE, B_FALSE); | |
62840030 | 3119 | return (NULL); |
428870ff | 3120 | } |
a6255b7f DQ |
3121 | if (dde->dde_repair_abd != NULL) { |
3122 | abd_copy(zio->io_abd, dde->dde_repair_abd, | |
3123 | zio->io_size); | |
428870ff BB |
3124 | zio->io_child_error[ZIO_CHILD_DDT] = 0; |
3125 | } | |
3126 | ddt_repair_done(ddt, dde); | |
3127 | zio->io_vsd = NULL; | |
3128 | } | |
3129 | ||
3130 | ASSERT(zio->io_vsd == NULL); | |
3131 | ||
62840030 | 3132 | return (zio); |
428870ff BB |
3133 | } |
3134 | ||
3135 | static boolean_t | |
3136 | zio_ddt_collision(zio_t *zio, ddt_t *ddt, ddt_entry_t *dde) | |
3137 | { | |
3138 | spa_t *spa = zio->io_spa; | |
c17bcf83 | 3139 | boolean_t do_raw = !!(zio->io_flags & ZIO_FLAG_RAW); |
428870ff | 3140 | |
c17bcf83 | 3141 | ASSERT(!(zio->io_bp_override && do_raw)); |
2aa34383 | 3142 | |
428870ff BB |
3143 | /* |
3144 | * Note: we compare the original data, not the transformed data, | |
3145 | * because when zio->io_bp is an override bp, we will not have | |
3146 | * pushed the I/O transforms. That's an important optimization | |
3147 | * because otherwise we'd compress/encrypt all dmu_sync() data twice. | |
c17bcf83 | 3148 | * However, we should never get a raw, override zio so in these |
b5256303 | 3149 | * cases we can compare the io_abd directly. This is useful because |
c17bcf83 TC |
3150 | * it allows us to do dedup verification even if we don't have access |
3151 | * to the original data (for instance, if the encryption keys aren't | |
3152 | * loaded). | |
428870ff | 3153 | */ |
c17bcf83 | 3154 | |
1c27024e | 3155 | for (int p = DDT_PHYS_SINGLE; p <= DDT_PHYS_TRIPLE; p++) { |
428870ff BB |
3156 | zio_t *lio = dde->dde_lead_zio[p]; |
3157 | ||
c17bcf83 TC |
3158 | if (lio != NULL && do_raw) { |
3159 | return (lio->io_size != zio->io_size || | |
a6255b7f | 3160 | abd_cmp(zio->io_abd, lio->io_abd) != 0); |
c17bcf83 | 3161 | } else if (lio != NULL) { |
428870ff | 3162 | return (lio->io_orig_size != zio->io_orig_size || |
a6255b7f | 3163 | abd_cmp(zio->io_orig_abd, lio->io_orig_abd) != 0); |
428870ff BB |
3164 | } |
3165 | } | |
3166 | ||
1c27024e | 3167 | for (int p = DDT_PHYS_SINGLE; p <= DDT_PHYS_TRIPLE; p++) { |
428870ff BB |
3168 | ddt_phys_t *ddp = &dde->dde_phys[p]; |
3169 | ||
c17bcf83 TC |
3170 | if (ddp->ddp_phys_birth != 0 && do_raw) { |
3171 | blkptr_t blk = *zio->io_bp; | |
3172 | uint64_t psize; | |
a6255b7f | 3173 | abd_t *tmpabd; |
c17bcf83 TC |
3174 | int error; |
3175 | ||
3176 | ddt_bp_fill(ddp, &blk, ddp->ddp_phys_birth); | |
3177 | psize = BP_GET_PSIZE(&blk); | |
3178 | ||
3179 | if (psize != zio->io_size) | |
3180 | return (B_TRUE); | |
3181 | ||
3182 | ddt_exit(ddt); | |
3183 | ||
a6255b7f | 3184 | tmpabd = abd_alloc_for_io(psize, B_TRUE); |
c17bcf83 | 3185 | |
a6255b7f | 3186 | error = zio_wait(zio_read(NULL, spa, &blk, tmpabd, |
c17bcf83 TC |
3187 | psize, NULL, NULL, ZIO_PRIORITY_SYNC_READ, |
3188 | ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE | | |
3189 | ZIO_FLAG_RAW, &zio->io_bookmark)); | |
3190 | ||
3191 | if (error == 0) { | |
a6255b7f | 3192 | if (abd_cmp(tmpabd, zio->io_abd) != 0) |
c17bcf83 TC |
3193 | error = SET_ERROR(ENOENT); |
3194 | } | |
3195 | ||
a6255b7f | 3196 | abd_free(tmpabd); |
c17bcf83 TC |
3197 | ddt_enter(ddt); |
3198 | return (error != 0); | |
3199 | } else if (ddp->ddp_phys_birth != 0) { | |
428870ff | 3200 | arc_buf_t *abuf = NULL; |
2a432414 | 3201 | arc_flags_t aflags = ARC_FLAG_WAIT; |
428870ff BB |
3202 | blkptr_t blk = *zio->io_bp; |
3203 | int error; | |
3204 | ||
3205 | ddt_bp_fill(ddp, &blk, ddp->ddp_phys_birth); | |
3206 | ||
c17bcf83 TC |
3207 | if (BP_GET_LSIZE(&blk) != zio->io_orig_size) |
3208 | return (B_TRUE); | |
3209 | ||
428870ff BB |
3210 | ddt_exit(ddt); |
3211 | ||
294f6806 | 3212 | error = arc_read(NULL, spa, &blk, |
428870ff BB |
3213 | arc_getbuf_func, &abuf, ZIO_PRIORITY_SYNC_READ, |
3214 | ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE, | |
3215 | &aflags, &zio->io_bookmark); | |
3216 | ||
3217 | if (error == 0) { | |
a6255b7f | 3218 | if (abd_cmp_buf(zio->io_orig_abd, abuf->b_data, |
428870ff | 3219 | zio->io_orig_size) != 0) |
c17bcf83 | 3220 | error = SET_ERROR(ENOENT); |
d3c2ae1c | 3221 | arc_buf_destroy(abuf, &abuf); |
428870ff BB |
3222 | } |
3223 | ||
3224 | ddt_enter(ddt); | |
3225 | return (error != 0); | |
3226 | } | |
3227 | } | |
3228 | ||
3229 | return (B_FALSE); | |
3230 | } | |
3231 | ||
3232 | static void | |
3233 | zio_ddt_child_write_ready(zio_t *zio) | |
3234 | { | |
3235 | int p = zio->io_prop.zp_copies; | |
3236 | ddt_t *ddt = ddt_select(zio->io_spa, zio->io_bp); | |
3237 | ddt_entry_t *dde = zio->io_private; | |
3238 | ddt_phys_t *ddp = &dde->dde_phys[p]; | |
3239 | zio_t *pio; | |
3240 | ||
3241 | if (zio->io_error) | |
3242 | return; | |
3243 | ||
3244 | ddt_enter(ddt); | |
3245 | ||
3246 | ASSERT(dde->dde_lead_zio[p] == zio); | |
3247 | ||
3248 | ddt_phys_fill(ddp, zio->io_bp); | |
3249 | ||
1c27024e | 3250 | zio_link_t *zl = NULL; |
3dfb57a3 | 3251 | while ((pio = zio_walk_parents(zio, &zl)) != NULL) |
428870ff BB |
3252 | ddt_bp_fill(ddp, pio->io_bp, zio->io_txg); |
3253 | ||
3254 | ddt_exit(ddt); | |
3255 | } | |
3256 | ||
3257 | static void | |
3258 | zio_ddt_child_write_done(zio_t *zio) | |
3259 | { | |
3260 | int p = zio->io_prop.zp_copies; | |
3261 | ddt_t *ddt = ddt_select(zio->io_spa, zio->io_bp); | |
3262 | ddt_entry_t *dde = zio->io_private; | |
3263 | ddt_phys_t *ddp = &dde->dde_phys[p]; | |
3264 | ||
3265 | ddt_enter(ddt); | |
3266 | ||
3267 | ASSERT(ddp->ddp_refcnt == 0); | |
3268 | ASSERT(dde->dde_lead_zio[p] == zio); | |
3269 | dde->dde_lead_zio[p] = NULL; | |
3270 | ||
3271 | if (zio->io_error == 0) { | |
3dfb57a3 DB |
3272 | zio_link_t *zl = NULL; |
3273 | while (zio_walk_parents(zio, &zl) != NULL) | |
428870ff BB |
3274 | ddt_phys_addref(ddp); |
3275 | } else { | |
3276 | ddt_phys_clear(ddp); | |
3277 | } | |
3278 | ||
3279 | ddt_exit(ddt); | |
3280 | } | |
3281 | ||
62840030 | 3282 | static zio_t * |
428870ff BB |
3283 | zio_ddt_write(zio_t *zio) |
3284 | { | |
3285 | spa_t *spa = zio->io_spa; | |
3286 | blkptr_t *bp = zio->io_bp; | |
3287 | uint64_t txg = zio->io_txg; | |
3288 | zio_prop_t *zp = &zio->io_prop; | |
3289 | int p = zp->zp_copies; | |
428870ff | 3290 | zio_t *cio = NULL; |
428870ff BB |
3291 | ddt_t *ddt = ddt_select(spa, bp); |
3292 | ddt_entry_t *dde; | |
3293 | ddt_phys_t *ddp; | |
3294 | ||
3295 | ASSERT(BP_GET_DEDUP(bp)); | |
3296 | ASSERT(BP_GET_CHECKSUM(bp) == zp->zp_checksum); | |
3297 | ASSERT(BP_IS_HOLE(bp) || zio->io_bp_override); | |
c17bcf83 | 3298 | ASSERT(!(zio->io_bp_override && (zio->io_flags & ZIO_FLAG_RAW))); |
428870ff BB |
3299 | |
3300 | ddt_enter(ddt); | |
3301 | dde = ddt_lookup(ddt, bp, B_TRUE); | |
3302 | ddp = &dde->dde_phys[p]; | |
3303 | ||
3304 | if (zp->zp_dedup_verify && zio_ddt_collision(zio, ddt, dde)) { | |
3305 | /* | |
3306 | * If we're using a weak checksum, upgrade to a strong checksum | |
3307 | * and try again. If we're already using a strong checksum, | |
3308 | * we can't resolve it, so just convert to an ordinary write. | |
3309 | * (And automatically e-mail a paper to Nature?) | |
3310 | */ | |
3c67d83a TH |
3311 | if (!(zio_checksum_table[zp->zp_checksum].ci_flags & |
3312 | ZCHECKSUM_FLAG_DEDUP)) { | |
428870ff BB |
3313 | zp->zp_checksum = spa_dedup_checksum(spa); |
3314 | zio_pop_transforms(zio); | |
3315 | zio->io_stage = ZIO_STAGE_OPEN; | |
3316 | BP_ZERO(bp); | |
3317 | } else { | |
03c6040b | 3318 | zp->zp_dedup = B_FALSE; |
accd6d9d | 3319 | BP_SET_DEDUP(bp, B_FALSE); |
428870ff | 3320 | } |
accd6d9d | 3321 | ASSERT(!BP_GET_DEDUP(bp)); |
428870ff BB |
3322 | zio->io_pipeline = ZIO_WRITE_PIPELINE; |
3323 | ddt_exit(ddt); | |
62840030 | 3324 | return (zio); |
428870ff BB |
3325 | } |
3326 | ||
428870ff BB |
3327 | if (ddp->ddp_phys_birth != 0 || dde->dde_lead_zio[p] != NULL) { |
3328 | if (ddp->ddp_phys_birth != 0) | |
3329 | ddt_bp_fill(ddp, bp, txg); | |
3330 | if (dde->dde_lead_zio[p] != NULL) | |
3331 | zio_add_child(zio, dde->dde_lead_zio[p]); | |
3332 | else | |
3333 | ddt_phys_addref(ddp); | |
3334 | } else if (zio->io_bp_override) { | |
3335 | ASSERT(bp->blk_birth == txg); | |
3336 | ASSERT(BP_EQUAL(bp, zio->io_bp_override)); | |
3337 | ddt_phys_fill(ddp, bp); | |
3338 | ddt_phys_addref(ddp); | |
3339 | } else { | |
a6255b7f | 3340 | cio = zio_write(zio, spa, txg, bp, zio->io_orig_abd, |
2aa34383 | 3341 | zio->io_orig_size, zio->io_orig_size, zp, |
bc77ba73 | 3342 | zio_ddt_child_write_ready, NULL, NULL, |
428870ff BB |
3343 | zio_ddt_child_write_done, dde, zio->io_priority, |
3344 | ZIO_DDT_CHILD_FLAGS(zio), &zio->io_bookmark); | |
3345 | ||
a6255b7f | 3346 | zio_push_transform(cio, zio->io_abd, zio->io_size, 0, NULL); |
428870ff BB |
3347 | dde->dde_lead_zio[p] = cio; |
3348 | } | |
3349 | ||
3350 | ddt_exit(ddt); | |
3351 | ||
9cdf7b1f | 3352 | zio_nowait(cio); |
428870ff | 3353 | |
62840030 | 3354 | return (zio); |
428870ff BB |
3355 | } |
3356 | ||
3357 | ddt_entry_t *freedde; /* for debugging */ | |
b128c09f | 3358 | |
62840030 | 3359 | static zio_t * |
428870ff BB |
3360 | zio_ddt_free(zio_t *zio) |
3361 | { | |
3362 | spa_t *spa = zio->io_spa; | |
3363 | blkptr_t *bp = zio->io_bp; | |
3364 | ddt_t *ddt = ddt_select(spa, bp); | |
3365 | ddt_entry_t *dde; | |
3366 | ddt_phys_t *ddp; | |
3367 | ||
3368 | ASSERT(BP_GET_DEDUP(bp)); | |
3369 | ASSERT(zio->io_child_type == ZIO_CHILD_LOGICAL); | |
3370 | ||
3371 | ddt_enter(ddt); | |
3372 | freedde = dde = ddt_lookup(ddt, bp, B_TRUE); | |
5dc6af0e BB |
3373 | if (dde) { |
3374 | ddp = ddt_phys_select(dde, bp); | |
3375 | if (ddp) | |
3376 | ddt_phys_decref(ddp); | |
3377 | } | |
428870ff BB |
3378 | ddt_exit(ddt); |
3379 | ||
62840030 | 3380 | return (zio); |
428870ff BB |
3381 | } |
3382 | ||
3383 | /* | |
3384 | * ========================================================================== | |
3385 | * Allocate and free blocks | |
3386 | * ========================================================================== | |
3387 | */ | |
3dfb57a3 DB |
3388 | |
3389 | static zio_t * | |
492f64e9 | 3390 | zio_io_to_allocate(spa_t *spa, int allocator) |
3dfb57a3 DB |
3391 | { |
3392 | zio_t *zio; | |
3393 | ||
1b50749c | 3394 | ASSERT(MUTEX_HELD(&spa->spa_allocs[allocator].spaa_lock)); |
3dfb57a3 | 3395 | |
1b50749c | 3396 | zio = avl_first(&spa->spa_allocs[allocator].spaa_tree); |
3dfb57a3 DB |
3397 | if (zio == NULL) |
3398 | return (NULL); | |
3399 | ||
3400 | ASSERT(IO_IS_ALLOCATING(zio)); | |
3401 | ||
3402 | /* | |
3403 | * Try to place a reservation for this zio. If we're unable to | |
3404 | * reserve then we throttle. | |
3405 | */ | |
492f64e9 | 3406 | ASSERT3U(zio->io_allocator, ==, allocator); |
cc99f275 | 3407 | if (!metaslab_class_throttle_reserve(zio->io_metaslab_class, |
1b50749c | 3408 | zio->io_prop.zp_copies, allocator, zio, 0)) { |
3dfb57a3 DB |
3409 | return (NULL); |
3410 | } | |
3411 | ||
1b50749c | 3412 | avl_remove(&spa->spa_allocs[allocator].spaa_tree, zio); |
3dfb57a3 DB |
3413 | ASSERT3U(zio->io_stage, <, ZIO_STAGE_DVA_ALLOCATE); |
3414 | ||
3415 | return (zio); | |
3416 | } | |
3417 | ||
62840030 | 3418 | static zio_t * |
3dfb57a3 DB |
3419 | zio_dva_throttle(zio_t *zio) |
3420 | { | |
3421 | spa_t *spa = zio->io_spa; | |
3422 | zio_t *nio; | |
cc99f275 DB |
3423 | metaslab_class_t *mc; |
3424 | ||
3425 | /* locate an appropriate allocation class */ | |
3426 | mc = spa_preferred_class(spa, zio->io_size, zio->io_prop.zp_type, | |
3427 | zio->io_prop.zp_level, zio->io_prop.zp_zpl_smallblk); | |
3dfb57a3 DB |
3428 | |
3429 | if (zio->io_priority == ZIO_PRIORITY_SYNC_WRITE || | |
cc99f275 | 3430 | !mc->mc_alloc_throttle_enabled || |
3dfb57a3 DB |
3431 | zio->io_child_type == ZIO_CHILD_GANG || |
3432 | zio->io_flags & ZIO_FLAG_NODATA) { | |
62840030 | 3433 | return (zio); |
3dfb57a3 DB |
3434 | } |
3435 | ||
1b50749c | 3436 | ASSERT(zio->io_type == ZIO_TYPE_WRITE); |
3dfb57a3 | 3437 | ASSERT(zio->io_child_type > ZIO_CHILD_GANG); |
3dfb57a3 DB |
3438 | ASSERT3U(zio->io_queued_timestamp, >, 0); |
3439 | ASSERT(zio->io_stage == ZIO_STAGE_DVA_THROTTLE); | |
3440 | ||
492f64e9 PD |
3441 | zbookmark_phys_t *bm = &zio->io_bookmark; |
3442 | /* | |
3443 | * We want to try to use as many allocators as possible to help improve | |
3444 | * performance, but we also want logically adjacent IOs to be physically | |
3445 | * adjacent to improve sequential read performance. We chunk each object | |
3446 | * into 2^20 block regions, and then hash based on the objset, object, | |
3447 | * level, and region to accomplish both of these goals. | |
3448 | */ | |
1b50749c | 3449 | int allocator = (uint_t)cityhash4(bm->zb_objset, bm->zb_object, |
492f64e9 | 3450 | bm->zb_level, bm->zb_blkid >> 20) % spa->spa_alloc_count; |
1b50749c | 3451 | zio->io_allocator = allocator; |
cc99f275 | 3452 | zio->io_metaslab_class = mc; |
1b50749c AM |
3453 | mutex_enter(&spa->spa_allocs[allocator].spaa_lock); |
3454 | avl_add(&spa->spa_allocs[allocator].spaa_tree, zio); | |
3455 | nio = zio_io_to_allocate(spa, allocator); | |
3456 | mutex_exit(&spa->spa_allocs[allocator].spaa_lock); | |
62840030 | 3457 | return (nio); |
3dfb57a3 DB |
3458 | } |
3459 | ||
cc99f275 | 3460 | static void |
492f64e9 | 3461 | zio_allocate_dispatch(spa_t *spa, int allocator) |
3dfb57a3 DB |
3462 | { |
3463 | zio_t *zio; | |
3464 | ||
1b50749c | 3465 | mutex_enter(&spa->spa_allocs[allocator].spaa_lock); |
492f64e9 | 3466 | zio = zio_io_to_allocate(spa, allocator); |
1b50749c | 3467 | mutex_exit(&spa->spa_allocs[allocator].spaa_lock); |
3dfb57a3 DB |
3468 | if (zio == NULL) |
3469 | return; | |
3470 | ||
3471 | ASSERT3U(zio->io_stage, ==, ZIO_STAGE_DVA_THROTTLE); | |
3472 | ASSERT0(zio->io_error); | |
3473 | zio_taskq_dispatch(zio, ZIO_TASKQ_ISSUE, B_TRUE); | |
3474 | } | |
3475 | ||
62840030 | 3476 | static zio_t * |
34dc7c2f BB |
3477 | zio_dva_allocate(zio_t *zio) |
3478 | { | |
3479 | spa_t *spa = zio->io_spa; | |
cc99f275 | 3480 | metaslab_class_t *mc; |
34dc7c2f BB |
3481 | blkptr_t *bp = zio->io_bp; |
3482 | int error; | |
6d974228 | 3483 | int flags = 0; |
34dc7c2f | 3484 | |
9babb374 BB |
3485 | if (zio->io_gang_leader == NULL) { |
3486 | ASSERT(zio->io_child_type > ZIO_CHILD_GANG); | |
3487 | zio->io_gang_leader = zio; | |
3488 | } | |
3489 | ||
34dc7c2f | 3490 | ASSERT(BP_IS_HOLE(bp)); |
c99c9001 | 3491 | ASSERT0(BP_GET_NDVAS(bp)); |
428870ff BB |
3492 | ASSERT3U(zio->io_prop.zp_copies, >, 0); |
3493 | ASSERT3U(zio->io_prop.zp_copies, <=, spa_max_replication(spa)); | |
34dc7c2f BB |
3494 | ASSERT3U(zio->io_size, ==, BP_GET_PSIZE(bp)); |
3495 | ||
920dd524 | 3496 | flags |= (zio->io_flags & ZIO_FLAG_FASTWRITE) ? METASLAB_FASTWRITE : 0; |
3dfb57a3 DB |
3497 | if (zio->io_flags & ZIO_FLAG_NODATA) |
3498 | flags |= METASLAB_DONT_THROTTLE; | |
3499 | if (zio->io_flags & ZIO_FLAG_GANG_CHILD) | |
3500 | flags |= METASLAB_GANG_CHILD; | |
3501 | if (zio->io_priority == ZIO_PRIORITY_ASYNC_WRITE) | |
3502 | flags |= METASLAB_ASYNC_ALLOC; | |
3503 | ||
cc99f275 DB |
3504 | /* |
3505 | * if not already chosen, locate an appropriate allocation class | |
3506 | */ | |
3507 | mc = zio->io_metaslab_class; | |
3508 | if (mc == NULL) { | |
3509 | mc = spa_preferred_class(spa, zio->io_size, | |
3510 | zio->io_prop.zp_type, zio->io_prop.zp_level, | |
3511 | zio->io_prop.zp_zpl_smallblk); | |
3512 | zio->io_metaslab_class = mc; | |
3513 | } | |
3514 | ||
aa755b35 MA |
3515 | /* |
3516 | * Try allocating the block in the usual metaslab class. | |
3517 | * If that's full, allocate it in the normal class. | |
3518 | * If that's full, allocate as a gang block, | |
3519 | * and if all are full, the allocation fails (which shouldn't happen). | |
3520 | * | |
3521 | * Note that we do not fall back on embedded slog (ZIL) space, to | |
3522 | * preserve unfragmented slog space, which is critical for decent | |
3523 | * sync write performance. If a log allocation fails, we will fall | |
3524 | * back to spa_sync() which is abysmal for performance. | |
3525 | */ | |
b128c09f | 3526 | error = metaslab_alloc(spa, mc, zio->io_size, bp, |
4e21fd06 | 3527 | zio->io_prop.zp_copies, zio->io_txg, NULL, flags, |
492f64e9 | 3528 | &zio->io_alloc_list, zio, zio->io_allocator); |
34dc7c2f | 3529 | |
cc99f275 DB |
3530 | /* |
3531 | * Fallback to normal class when an alloc class is full | |
3532 | */ | |
3533 | if (error == ENOSPC && mc != spa_normal_class(spa)) { | |
3534 | /* | |
3535 | * If throttling, transfer reservation over to normal class. | |
3536 | * The io_allocator slot can remain the same even though we | |
3537 | * are switching classes. | |
3538 | */ | |
3539 | if (mc->mc_alloc_throttle_enabled && | |
3540 | (zio->io_flags & ZIO_FLAG_IO_ALLOCATING)) { | |
3541 | metaslab_class_throttle_unreserve(mc, | |
3542 | zio->io_prop.zp_copies, zio->io_allocator, zio); | |
3543 | zio->io_flags &= ~ZIO_FLAG_IO_ALLOCATING; | |
3544 | ||
aa755b35 MA |
3545 | VERIFY(metaslab_class_throttle_reserve( |
3546 | spa_normal_class(spa), | |
cc99f275 DB |
3547 | zio->io_prop.zp_copies, zio->io_allocator, zio, |
3548 | flags | METASLAB_MUST_RESERVE)); | |
cc99f275 | 3549 | } |
aa755b35 MA |
3550 | zio->io_metaslab_class = mc = spa_normal_class(spa); |
3551 | if (zfs_flags & ZFS_DEBUG_METASLAB_ALLOC) { | |
3552 | zfs_dbgmsg("%s: metaslab allocation failure, " | |
3553 | "trying normal class: zio %px, size %llu, error %d", | |
8e739b2c RE |
3554 | spa_name(spa), zio, (u_longlong_t)zio->io_size, |
3555 | error); | |
aa755b35 | 3556 | } |
cc99f275 DB |
3557 | |
3558 | error = metaslab_alloc(spa, mc, zio->io_size, bp, | |
3559 | zio->io_prop.zp_copies, zio->io_txg, NULL, flags, | |
3560 | &zio->io_alloc_list, zio, zio->io_allocator); | |
3561 | } | |
3562 | ||
aa755b35 MA |
3563 | if (error == ENOSPC && zio->io_size > SPA_MINBLOCKSIZE) { |
3564 | if (zfs_flags & ZFS_DEBUG_METASLAB_ALLOC) { | |
3565 | zfs_dbgmsg("%s: metaslab allocation failure, " | |
3566 | "trying ganging: zio %px, size %llu, error %d", | |
8e739b2c RE |
3567 | spa_name(spa), zio, (u_longlong_t)zio->io_size, |
3568 | error); | |
aa755b35 MA |
3569 | } |
3570 | return (zio_write_gang_block(zio, mc)); | |
3571 | } | |
3dfb57a3 | 3572 | if (error != 0) { |
aa755b35 MA |
3573 | if (error != ENOSPC || |
3574 | (zfs_flags & ZFS_DEBUG_METASLAB_ALLOC)) { | |
3575 | zfs_dbgmsg("%s: metaslab allocation failure: zio %px, " | |
3576 | "size %llu, error %d", | |
8e739b2c RE |
3577 | spa_name(spa), zio, (u_longlong_t)zio->io_size, |
3578 | error); | |
aa755b35 | 3579 | } |
34dc7c2f BB |
3580 | zio->io_error = error; |
3581 | } | |
3582 | ||
62840030 | 3583 | return (zio); |
34dc7c2f BB |
3584 | } |
3585 | ||
62840030 | 3586 | static zio_t * |
34dc7c2f BB |
3587 | zio_dva_free(zio_t *zio) |
3588 | { | |
b128c09f | 3589 | metaslab_free(zio->io_spa, zio->io_bp, zio->io_txg, B_FALSE); |
34dc7c2f | 3590 | |
62840030 | 3591 | return (zio); |
34dc7c2f BB |
3592 | } |
3593 | ||
62840030 | 3594 | static zio_t * |
34dc7c2f BB |
3595 | zio_dva_claim(zio_t *zio) |
3596 | { | |
b128c09f BB |
3597 | int error; |
3598 | ||
3599 | error = metaslab_claim(zio->io_spa, zio->io_bp, zio->io_txg); | |
3600 | if (error) | |
3601 | zio->io_error = error; | |
34dc7c2f | 3602 | |
62840030 | 3603 | return (zio); |
34dc7c2f BB |
3604 | } |
3605 | ||
b128c09f BB |
3606 | /* |
3607 | * Undo an allocation. This is used by zio_done() when an I/O fails | |
3608 | * and we want to give back the block we just allocated. | |
3609 | * This handles both normal blocks and gang blocks. | |
3610 | */ | |
3611 | static void | |
3612 | zio_dva_unallocate(zio_t *zio, zio_gang_node_t *gn, blkptr_t *bp) | |
3613 | { | |
b128c09f | 3614 | ASSERT(bp->blk_birth == zio->io_txg || BP_IS_HOLE(bp)); |
428870ff | 3615 | ASSERT(zio->io_bp_override == NULL); |
b128c09f BB |
3616 | |
3617 | if (!BP_IS_HOLE(bp)) | |
428870ff | 3618 | metaslab_free(zio->io_spa, bp, bp->blk_birth, B_TRUE); |
b128c09f BB |
3619 | |
3620 | if (gn != NULL) { | |
1c27024e | 3621 | for (int g = 0; g < SPA_GBH_NBLKPTRS; g++) { |
b128c09f BB |
3622 | zio_dva_unallocate(zio, gn->gn_child[g], |
3623 | &gn->gn_gbh->zg_blkptr[g]); | |
3624 | } | |
3625 | } | |
3626 | } | |
3627 | ||
3628 | /* | |
3629 | * Try to allocate an intent log block. Return 0 on success, errno on failure. | |
3630 | */ | |
3631 | int | |
b5256303 TC |
3632 | zio_alloc_zil(spa_t *spa, objset_t *os, uint64_t txg, blkptr_t *new_bp, |
3633 | uint64_t size, boolean_t *slog) | |
b128c09f | 3634 | { |
428870ff | 3635 | int error = 1; |
4e21fd06 | 3636 | zio_alloc_list_t io_alloc_list; |
b128c09f | 3637 | |
428870ff BB |
3638 | ASSERT(txg > spa_syncing_txg(spa)); |
3639 | ||
4e21fd06 | 3640 | metaslab_trace_init(&io_alloc_list); |
cc99f275 DB |
3641 | |
3642 | /* | |
3643 | * Block pointer fields are useful to metaslabs for stats and debugging. | |
3644 | * Fill in the obvious ones before calling into metaslab_alloc(). | |
3645 | */ | |
3646 | BP_SET_TYPE(new_bp, DMU_OT_INTENT_LOG); | |
3647 | BP_SET_PSIZE(new_bp, size); | |
3648 | BP_SET_LEVEL(new_bp, 0); | |
3649 | ||
492f64e9 PD |
3650 | /* |
3651 | * When allocating a zil block, we don't have information about | |
3652 | * the final destination of the block except the objset it's part | |
3653 | * of, so we just hash the objset ID to pick the allocator to get | |
3654 | * some parallelism. | |
3655 | */ | |
be5c6d96 | 3656 | int flags = METASLAB_FASTWRITE | METASLAB_ZIL; |
1b50749c AM |
3657 | int allocator = (uint_t)cityhash4(0, 0, 0, |
3658 | os->os_dsl_dataset->ds_object) % spa->spa_alloc_count; | |
aa755b35 MA |
3659 | error = metaslab_alloc(spa, spa_log_class(spa), size, new_bp, 1, |
3660 | txg, NULL, flags, &io_alloc_list, NULL, allocator); | |
3661 | *slog = (error == 0); | |
3662 | if (error != 0) { | |
3663 | error = metaslab_alloc(spa, spa_embedded_log_class(spa), size, | |
3664 | new_bp, 1, txg, NULL, flags, | |
3665 | &io_alloc_list, NULL, allocator); | |
3666 | } | |
3667 | if (error != 0) { | |
3668 | error = metaslab_alloc(spa, spa_normal_class(spa), size, | |
3669 | new_bp, 1, txg, NULL, flags, | |
3670 | &io_alloc_list, NULL, allocator); | |
ebf8e3a2 | 3671 | } |
4e21fd06 | 3672 | metaslab_trace_fini(&io_alloc_list); |
b128c09f BB |
3673 | |
3674 | if (error == 0) { | |
3675 | BP_SET_LSIZE(new_bp, size); | |
3676 | BP_SET_PSIZE(new_bp, size); | |
3677 | BP_SET_COMPRESS(new_bp, ZIO_COMPRESS_OFF); | |
428870ff BB |
3678 | BP_SET_CHECKSUM(new_bp, |
3679 | spa_version(spa) >= SPA_VERSION_SLIM_ZIL | |
3680 | ? ZIO_CHECKSUM_ZILOG2 : ZIO_CHECKSUM_ZILOG); | |
b128c09f BB |
3681 | BP_SET_TYPE(new_bp, DMU_OT_INTENT_LOG); |
3682 | BP_SET_LEVEL(new_bp, 0); | |
428870ff | 3683 | BP_SET_DEDUP(new_bp, 0); |
b128c09f | 3684 | BP_SET_BYTEORDER(new_bp, ZFS_HOST_BYTEORDER); |
b5256303 TC |
3685 | |
3686 | /* | |
3687 | * encrypted blocks will require an IV and salt. We generate | |
3688 | * these now since we will not be rewriting the bp at | |
3689 | * rewrite time. | |
3690 | */ | |
3691 | if (os->os_encrypted) { | |
3692 | uint8_t iv[ZIO_DATA_IV_LEN]; | |
3693 | uint8_t salt[ZIO_DATA_SALT_LEN]; | |
3694 | ||
3695 | BP_SET_CRYPT(new_bp, B_TRUE); | |
3696 | VERIFY0(spa_crypt_get_salt(spa, | |
3697 | dmu_objset_id(os), salt)); | |
3698 | VERIFY0(zio_crypt_generate_iv(iv)); | |
3699 | ||
3700 | zio_crypt_encode_params_bp(new_bp, salt, iv); | |
3701 | } | |
1ce23dca PS |
3702 | } else { |
3703 | zfs_dbgmsg("%s: zil block allocation failure: " | |
8e739b2c RE |
3704 | "size %llu, error %d", spa_name(spa), (u_longlong_t)size, |
3705 | error); | |
b128c09f BB |
3706 | } |
3707 | ||
3708 | return (error); | |
3709 | } | |
3710 | ||
34dc7c2f BB |
3711 | /* |
3712 | * ========================================================================== | |
3713 | * Read and write to physical devices | |
3714 | * ========================================================================== | |
3715 | */ | |
98b25418 | 3716 | |
98b25418 GW |
3717 | /* |
3718 | * Issue an I/O to the underlying vdev. Typically the issue pipeline | |
3719 | * stops after this stage and will resume upon I/O completion. | |
3720 | * However, there are instances where the vdev layer may need to | |
3721 | * continue the pipeline when an I/O was not issued. Since the I/O | |
3722 | * that was sent to the vdev layer might be different than the one | |
3723 | * currently active in the pipeline (see vdev_queue_io()), we explicitly | |
3724 | * force the underlying vdev layers to call either zio_execute() or | |
3725 | * zio_interrupt() to ensure that the pipeline continues with the correct I/O. | |
3726 | */ | |
62840030 | 3727 | static zio_t * |
34dc7c2f BB |
3728 | zio_vdev_io_start(zio_t *zio) |
3729 | { | |
3730 | vdev_t *vd = zio->io_vd; | |
34dc7c2f BB |
3731 | uint64_t align; |
3732 | spa_t *spa = zio->io_spa; | |
3733 | ||
193a37cb TH |
3734 | zio->io_delay = 0; |
3735 | ||
b128c09f BB |
3736 | ASSERT(zio->io_error == 0); |
3737 | ASSERT(zio->io_child_error[ZIO_CHILD_VDEV] == 0); | |
34dc7c2f | 3738 | |
b128c09f BB |
3739 | if (vd == NULL) { |
3740 | if (!(zio->io_flags & ZIO_FLAG_CONFIG_WRITER)) | |
3741 | spa_config_enter(spa, SCL_ZIO, zio, RW_READER); | |
34dc7c2f | 3742 | |
b128c09f BB |
3743 | /* |
3744 | * The mirror_ops handle multiple DVAs in a single BP. | |
3745 | */ | |
98b25418 | 3746 | vdev_mirror_ops.vdev_op_io_start(zio); |
62840030 | 3747 | return (NULL); |
34dc7c2f BB |
3748 | } |
3749 | ||
3dfb57a3 | 3750 | ASSERT3P(zio->io_logical, !=, zio); |
6cb8e530 PZ |
3751 | if (zio->io_type == ZIO_TYPE_WRITE) { |
3752 | ASSERT(spa->spa_trust_config); | |
3753 | ||
a1d477c2 MA |
3754 | /* |
3755 | * Note: the code can handle other kinds of writes, | |
3756 | * but we don't expect them. | |
3757 | */ | |
2a673e76 | 3758 | if (zio->io_vd->vdev_noalloc) { |
6cb8e530 PZ |
3759 | ASSERT(zio->io_flags & |
3760 | (ZIO_FLAG_PHYSICAL | ZIO_FLAG_SELF_HEAL | | |
3761 | ZIO_FLAG_RESILVER | ZIO_FLAG_INDUCE_DAMAGE)); | |
3762 | } | |
a1d477c2 | 3763 | } |
3dfb57a3 | 3764 | |
b128c09f BB |
3765 | align = 1ULL << vd->vdev_top->vdev_ashift; |
3766 | ||
b02fe35d AR |
3767 | if (!(zio->io_flags & ZIO_FLAG_PHYSICAL) && |
3768 | P2PHASE(zio->io_size, align) != 0) { | |
3769 | /* Transform logical writes to be a full physical block size. */ | |
34dc7c2f | 3770 | uint64_t asize = P2ROUNDUP(zio->io_size, align); |
a6255b7f | 3771 | abd_t *abuf = abd_alloc_sametype(zio->io_abd, asize); |
178e73b3 | 3772 | ASSERT(vd == vd->vdev_top); |
34dc7c2f | 3773 | if (zio->io_type == ZIO_TYPE_WRITE) { |
a6255b7f DQ |
3774 | abd_copy(abuf, zio->io_abd, zio->io_size); |
3775 | abd_zero_off(abuf, zio->io_size, asize - zio->io_size); | |
34dc7c2f | 3776 | } |
b128c09f | 3777 | zio_push_transform(zio, abuf, asize, asize, zio_subblock); |
34dc7c2f BB |
3778 | } |
3779 | ||
b02fe35d AR |
3780 | /* |
3781 | * If this is not a physical io, make sure that it is properly aligned | |
3782 | * before proceeding. | |
3783 | */ | |
3784 | if (!(zio->io_flags & ZIO_FLAG_PHYSICAL)) { | |
3785 | ASSERT0(P2PHASE(zio->io_offset, align)); | |
3786 | ASSERT0(P2PHASE(zio->io_size, align)); | |
3787 | } else { | |
3788 | /* | |
3789 | * For physical writes, we allow 512b aligned writes and assume | |
3790 | * the device will perform a read-modify-write as necessary. | |
3791 | */ | |
3792 | ASSERT0(P2PHASE(zio->io_offset, SPA_MINBLOCKSIZE)); | |
3793 | ASSERT0(P2PHASE(zio->io_size, SPA_MINBLOCKSIZE)); | |
3794 | } | |
3795 | ||
572e2857 | 3796 | VERIFY(zio->io_type != ZIO_TYPE_WRITE || spa_writeable(spa)); |
fb5f0bc8 BB |
3797 | |
3798 | /* | |
3799 | * If this is a repair I/O, and there's no self-healing involved -- | |
3800 | * that is, we're just resilvering what we expect to resilver -- | |
3801 | * then don't do the I/O unless zio's txg is actually in vd's DTL. | |
9e052db4 MA |
3802 | * This prevents spurious resilvering. |
3803 | * | |
3804 | * There are a few ways that we can end up creating these spurious | |
3805 | * resilver i/os: | |
3806 | * | |
3807 | * 1. A resilver i/o will be issued if any DVA in the BP has a | |
3808 | * dirty DTL. The mirror code will issue resilver writes to | |
3809 | * each DVA, including the one(s) that are not on vdevs with dirty | |
3810 | * DTLs. | |
3811 | * | |
3812 | * 2. With nested replication, which happens when we have a | |
3813 | * "replacing" or "spare" vdev that's a child of a mirror or raidz. | |
3814 | * For example, given mirror(replacing(A+B), C), it's likely that | |
3815 | * only A is out of date (it's the new device). In this case, we'll | |
3816 | * read from C, then use the data to resilver A+B -- but we don't | |
3817 | * actually want to resilver B, just A. The top-level mirror has no | |
3818 | * way to know this, so instead we just discard unnecessary repairs | |
3819 | * as we work our way down the vdev tree. | |
3820 | * | |
3821 | * 3. ZTEST also creates mirrors of mirrors, mirrors of raidz, etc. | |
3822 | * The same logic applies to any form of nested replication: ditto | |
3823 | * + mirror, RAID-Z + replacing, etc. | |
3824 | * | |
3825 | * However, indirect vdevs point off to other vdevs which may have | |
3826 | * DTL's, so we never bypass them. The child i/os on concrete vdevs | |
3827 | * will be properly bypassed instead. | |
b2255edc BB |
3828 | * |
3829 | * Leaf DTL_PARTIAL can be empty when a legitimate write comes from | |
3830 | * a dRAID spare vdev. For example, when a dRAID spare is first | |
3831 | * used, its spare blocks need to be written to but the leaf vdev's | |
3832 | * of such blocks can have empty DTL_PARTIAL. | |
3833 | * | |
3834 | * There seemed no clean way to allow such writes while bypassing | |
3835 | * spurious ones. At this point, just avoid all bypassing for dRAID | |
3836 | * for correctness. | |
fb5f0bc8 BB |
3837 | */ |
3838 | if ((zio->io_flags & ZIO_FLAG_IO_REPAIR) && | |
3839 | !(zio->io_flags & ZIO_FLAG_SELF_HEAL) && | |
3840 | zio->io_txg != 0 && /* not a delegated i/o */ | |
9e052db4 | 3841 | vd->vdev_ops != &vdev_indirect_ops && |
b2255edc | 3842 | vd->vdev_top->vdev_ops != &vdev_draid_ops && |
fb5f0bc8 BB |
3843 | !vdev_dtl_contains(vd, DTL_PARTIAL, zio->io_txg, 1)) { |
3844 | ASSERT(zio->io_type == ZIO_TYPE_WRITE); | |
fb5f0bc8 | 3845 | zio_vdev_io_bypass(zio); |
62840030 | 3846 | return (zio); |
fb5f0bc8 | 3847 | } |
34dc7c2f | 3848 | |
b2255edc BB |
3849 | /* |
3850 | * Select the next best leaf I/O to process. Distributed spares are | |
3851 | * excluded since they dispatch the I/O directly to a leaf vdev after | |
3852 | * applying the dRAID mapping. | |
3853 | */ | |
3854 | if (vd->vdev_ops->vdev_op_leaf && | |
3855 | vd->vdev_ops != &vdev_draid_spare_ops && | |
3856 | (zio->io_type == ZIO_TYPE_READ || | |
3857 | zio->io_type == ZIO_TYPE_WRITE || | |
3858 | zio->io_type == ZIO_TYPE_TRIM)) { | |
b128c09f | 3859 | |
b0bc7a84 | 3860 | if (zio->io_type == ZIO_TYPE_READ && vdev_cache_read(zio)) |
62840030 | 3861 | return (zio); |
b128c09f BB |
3862 | |
3863 | if ((zio = vdev_queue_io(zio)) == NULL) | |
62840030 | 3864 | return (NULL); |
b128c09f BB |
3865 | |
3866 | if (!vdev_accessible(vd, zio)) { | |
2e528b49 | 3867 | zio->io_error = SET_ERROR(ENXIO); |
b128c09f | 3868 | zio_interrupt(zio); |
62840030 | 3869 | return (NULL); |
b128c09f | 3870 | } |
67103816 | 3871 | zio->io_delay = gethrtime(); |
b128c09f BB |
3872 | } |
3873 | ||
98b25418 | 3874 | vd->vdev_ops->vdev_op_io_start(zio); |
62840030 | 3875 | return (NULL); |
34dc7c2f BB |
3876 | } |
3877 | ||
62840030 | 3878 | static zio_t * |
34dc7c2f BB |
3879 | zio_vdev_io_done(zio_t *zio) |
3880 | { | |
b128c09f BB |
3881 | vdev_t *vd = zio->io_vd; |
3882 | vdev_ops_t *ops = vd ? vd->vdev_ops : &vdev_mirror_ops; | |
3883 | boolean_t unexpected_error = B_FALSE; | |
34dc7c2f | 3884 | |
ddc751d5 | 3885 | if (zio_wait_for_children(zio, ZIO_CHILD_VDEV_BIT, ZIO_WAIT_DONE)) { |
62840030 | 3886 | return (NULL); |
ddc751d5 | 3887 | } |
34dc7c2f | 3888 | |
1b939560 BB |
3889 | ASSERT(zio->io_type == ZIO_TYPE_READ || |
3890 | zio->io_type == ZIO_TYPE_WRITE || zio->io_type == ZIO_TYPE_TRIM); | |
b128c09f | 3891 | |
193a37cb TH |
3892 | if (zio->io_delay) |
3893 | zio->io_delay = gethrtime() - zio->io_delay; | |
3894 | ||
b2255edc BB |
3895 | if (vd != NULL && vd->vdev_ops->vdev_op_leaf && |
3896 | vd->vdev_ops != &vdev_draid_spare_ops) { | |
b128c09f BB |
3897 | vdev_queue_io_done(zio); |
3898 | ||
3899 | if (zio->io_type == ZIO_TYPE_WRITE) | |
3900 | vdev_cache_write(zio); | |
3901 | ||
3902 | if (zio_injection_enabled && zio->io_error == 0) | |
d977122d DB |
3903 | zio->io_error = zio_handle_device_injections(vd, zio, |
3904 | EIO, EILSEQ); | |
b128c09f BB |
3905 | |
3906 | if (zio_injection_enabled && zio->io_error == 0) | |
3907 | zio->io_error = zio_handle_label_injection(zio, EIO); | |
3908 | ||
1b939560 | 3909 | if (zio->io_error && zio->io_type != ZIO_TYPE_TRIM) { |
b128c09f | 3910 | if (!vdev_accessible(vd, zio)) { |
2e528b49 | 3911 | zio->io_error = SET_ERROR(ENXIO); |
b128c09f BB |
3912 | } else { |
3913 | unexpected_error = B_TRUE; | |
3914 | } | |
3915 | } | |
3916 | } | |
3917 | ||
3918 | ops->vdev_op_io_done(zio); | |
34dc7c2f | 3919 | |
f43615d0 | 3920 | if (unexpected_error) |
d164b209 | 3921 | VERIFY(vdev_probe(vd, zio) == NULL); |
34dc7c2f | 3922 | |
62840030 | 3923 | return (zio); |
34dc7c2f BB |
3924 | } |
3925 | ||
a8b2e306 TC |
3926 | /* |
3927 | * This function is used to change the priority of an existing zio that is | |
3928 | * currently in-flight. This is used by the arc to upgrade priority in the | |
3929 | * event that a demand read is made for a block that is currently queued | |
3930 | * as a scrub or async read IO. Otherwise, the high priority read request | |
3931 | * would end up having to wait for the lower priority IO. | |
3932 | */ | |
3933 | void | |
3934 | zio_change_priority(zio_t *pio, zio_priority_t priority) | |
3935 | { | |
3936 | zio_t *cio, *cio_next; | |
3937 | zio_link_t *zl = NULL; | |
3938 | ||
3939 | ASSERT3U(priority, <, ZIO_PRIORITY_NUM_QUEUEABLE); | |
3940 | ||
3941 | if (pio->io_vd != NULL && pio->io_vd->vdev_ops->vdev_op_leaf) { | |
3942 | vdev_queue_change_io_priority(pio, priority); | |
3943 | } else { | |
3944 | pio->io_priority = priority; | |
3945 | } | |
3946 | ||
3947 | mutex_enter(&pio->io_lock); | |
3948 | for (cio = zio_walk_children(pio, &zl); cio != NULL; cio = cio_next) { | |
3949 | cio_next = zio_walk_children(pio, &zl); | |
3950 | zio_change_priority(cio, priority); | |
3951 | } | |
3952 | mutex_exit(&pio->io_lock); | |
3953 | } | |
3954 | ||
428870ff BB |
3955 | /* |
3956 | * For non-raidz ZIOs, we can just copy aside the bad data read from the | |
3957 | * disk, and use that to finish the checksum ereport later. | |
3958 | */ | |
3959 | static void | |
3960 | zio_vsd_default_cksum_finish(zio_cksum_report_t *zcr, | |
84c07ada | 3961 | const abd_t *good_buf) |
428870ff BB |
3962 | { |
3963 | /* no processing needed */ | |
3964 | zfs_ereport_finish_checksum(zcr, good_buf, zcr->zcr_cbdata, B_FALSE); | |
3965 | } | |
3966 | ||
428870ff | 3967 | void |
330c6c05 | 3968 | zio_vsd_default_cksum_report(zio_t *zio, zio_cksum_report_t *zcr) |
428870ff | 3969 | { |
84c07ada | 3970 | void *abd = abd_alloc_sametype(zio->io_abd, zio->io_size); |
428870ff | 3971 | |
84c07ada | 3972 | abd_copy(abd, zio->io_abd, zio->io_size); |
428870ff BB |
3973 | |
3974 | zcr->zcr_cbinfo = zio->io_size; | |
84c07ada | 3975 | zcr->zcr_cbdata = abd; |
428870ff | 3976 | zcr->zcr_finish = zio_vsd_default_cksum_finish; |
84c07ada | 3977 | zcr->zcr_free = zio_abd_free; |
428870ff BB |
3978 | } |
3979 | ||
62840030 | 3980 | static zio_t * |
34dc7c2f BB |
3981 | zio_vdev_io_assess(zio_t *zio) |
3982 | { | |
3983 | vdev_t *vd = zio->io_vd; | |
b128c09f | 3984 | |
ddc751d5 | 3985 | if (zio_wait_for_children(zio, ZIO_CHILD_VDEV_BIT, ZIO_WAIT_DONE)) { |
62840030 | 3986 | return (NULL); |
ddc751d5 | 3987 | } |
b128c09f BB |
3988 | |
3989 | if (vd == NULL && !(zio->io_flags & ZIO_FLAG_CONFIG_WRITER)) | |
3990 | spa_config_exit(zio->io_spa, SCL_ZIO, zio); | |
3991 | ||
3992 | if (zio->io_vsd != NULL) { | |
428870ff | 3993 | zio->io_vsd_ops->vsd_free(zio); |
b128c09f | 3994 | zio->io_vsd = NULL; |
34dc7c2f BB |
3995 | } |
3996 | ||
b128c09f | 3997 | if (zio_injection_enabled && zio->io_error == 0) |
34dc7c2f BB |
3998 | zio->io_error = zio_handle_fault_injection(zio, EIO); |
3999 | ||
4000 | /* | |
4001 | * If the I/O failed, determine whether we should attempt to retry it. | |
428870ff BB |
4002 | * |
4003 | * On retry, we cut in line in the issue queue, since we don't want | |
4004 | * compression/checksumming/etc. work to prevent our (cheap) IO reissue. | |
34dc7c2f | 4005 | */ |
b128c09f BB |
4006 | if (zio->io_error && vd == NULL && |
4007 | !(zio->io_flags & (ZIO_FLAG_DONT_RETRY | ZIO_FLAG_IO_RETRY))) { | |
4008 | ASSERT(!(zio->io_flags & ZIO_FLAG_DONT_QUEUE)); /* not a leaf */ | |
4009 | ASSERT(!(zio->io_flags & ZIO_FLAG_IO_BYPASS)); /* not a leaf */ | |
34dc7c2f | 4010 | zio->io_error = 0; |
b128c09f BB |
4011 | zio->io_flags |= ZIO_FLAG_IO_RETRY | |
4012 | ZIO_FLAG_DONT_CACHE | ZIO_FLAG_DONT_AGGREGATE; | |
428870ff BB |
4013 | zio->io_stage = ZIO_STAGE_VDEV_IO_START >> 1; |
4014 | zio_taskq_dispatch(zio, ZIO_TASKQ_ISSUE, | |
4015 | zio_requeue_io_start_cut_in_line); | |
62840030 | 4016 | return (NULL); |
34dc7c2f BB |
4017 | } |
4018 | ||
b128c09f BB |
4019 | /* |
4020 | * If we got an error on a leaf device, convert it to ENXIO | |
4021 | * if the device is not accessible at all. | |
4022 | */ | |
4023 | if (zio->io_error && vd != NULL && vd->vdev_ops->vdev_op_leaf && | |
4024 | !vdev_accessible(vd, zio)) | |
2e528b49 | 4025 | zio->io_error = SET_ERROR(ENXIO); |
b128c09f BB |
4026 | |
4027 | /* | |
4028 | * If we can't write to an interior vdev (mirror or RAID-Z), | |
4029 | * set vdev_cant_write so that we stop trying to allocate from it. | |
4030 | */ | |
4031 | if (zio->io_error == ENXIO && zio->io_type == ZIO_TYPE_WRITE && | |
13fe0198 | 4032 | vd != NULL && !vd->vdev_ops->vdev_op_leaf) { |
2b56a634 MA |
4033 | vdev_dbgmsg(vd, "zio_vdev_io_assess(zio=%px) setting " |
4034 | "cant_write=TRUE due to write failure with ENXIO", | |
4035 | zio); | |
b128c09f | 4036 | vd->vdev_cant_write = B_TRUE; |
13fe0198 | 4037 | } |
b128c09f | 4038 | |
298ec40b GM |
4039 | /* |
4040 | * If a cache flush returns ENOTSUP or ENOTTY, we know that no future | |
1b939560 BB |
4041 | * attempts will ever succeed. In this case we set a persistent |
4042 | * boolean flag so that we don't bother with it in the future. | |
298ec40b GM |
4043 | */ |
4044 | if ((zio->io_error == ENOTSUP || zio->io_error == ENOTTY) && | |
4045 | zio->io_type == ZIO_TYPE_IOCTL && | |
4046 | zio->io_cmd == DKIOCFLUSHWRITECACHE && vd != NULL) | |
4047 | vd->vdev_nowritecache = B_TRUE; | |
4048 | ||
b128c09f BB |
4049 | if (zio->io_error) |
4050 | zio->io_pipeline = ZIO_INTERLOCK_PIPELINE; | |
4051 | ||
e8b96c60 MA |
4052 | if (vd != NULL && vd->vdev_ops->vdev_op_leaf && |
4053 | zio->io_physdone != NULL) { | |
4054 | ASSERT(!(zio->io_flags & ZIO_FLAG_DELEGATED)); | |
4055 | ASSERT(zio->io_child_type == ZIO_CHILD_VDEV); | |
4056 | zio->io_physdone(zio->io_logical); | |
4057 | } | |
4058 | ||
62840030 | 4059 | return (zio); |
34dc7c2f BB |
4060 | } |
4061 | ||
4062 | void | |
4063 | zio_vdev_io_reissue(zio_t *zio) | |
4064 | { | |
4065 | ASSERT(zio->io_stage == ZIO_STAGE_VDEV_IO_START); | |
4066 | ASSERT(zio->io_error == 0); | |
4067 | ||
428870ff | 4068 | zio->io_stage >>= 1; |
34dc7c2f BB |
4069 | } |
4070 | ||
4071 | void | |
4072 | zio_vdev_io_redone(zio_t *zio) | |
4073 | { | |
4074 | ASSERT(zio->io_stage == ZIO_STAGE_VDEV_IO_DONE); | |
4075 | ||
428870ff | 4076 | zio->io_stage >>= 1; |
34dc7c2f BB |
4077 | } |
4078 | ||
4079 | void | |
4080 | zio_vdev_io_bypass(zio_t *zio) | |
4081 | { | |
4082 | ASSERT(zio->io_stage == ZIO_STAGE_VDEV_IO_START); | |
4083 | ASSERT(zio->io_error == 0); | |
4084 | ||
4085 | zio->io_flags |= ZIO_FLAG_IO_BYPASS; | |
428870ff | 4086 | zio->io_stage = ZIO_STAGE_VDEV_IO_ASSESS >> 1; |
34dc7c2f BB |
4087 | } |
4088 | ||
b5256303 TC |
4089 | /* |
4090 | * ========================================================================== | |
4091 | * Encrypt and store encryption parameters | |
4092 | * ========================================================================== | |
4093 | */ | |
4094 | ||
4095 | ||
4096 | /* | |
4097 | * This function is used for ZIO_STAGE_ENCRYPT. It is responsible for | |
4098 | * managing the storage of encryption parameters and passing them to the | |
4099 | * lower-level encryption functions. | |
4100 | */ | |
62840030 | 4101 | static zio_t * |
b5256303 TC |
4102 | zio_encrypt(zio_t *zio) |
4103 | { | |
4104 | zio_prop_t *zp = &zio->io_prop; | |
4105 | spa_t *spa = zio->io_spa; | |
4106 | blkptr_t *bp = zio->io_bp; | |
4107 | uint64_t psize = BP_GET_PSIZE(bp); | |
ae76f45c | 4108 | uint64_t dsobj = zio->io_bookmark.zb_objset; |
b5256303 TC |
4109 | dmu_object_type_t ot = BP_GET_TYPE(bp); |
4110 | void *enc_buf = NULL; | |
4111 | abd_t *eabd = NULL; | |
4112 | uint8_t salt[ZIO_DATA_SALT_LEN]; | |
4113 | uint8_t iv[ZIO_DATA_IV_LEN]; | |
4114 | uint8_t mac[ZIO_DATA_MAC_LEN]; | |
4115 | boolean_t no_crypt = B_FALSE; | |
4116 | ||
4117 | /* the root zio already encrypted the data */ | |
4118 | if (zio->io_child_type == ZIO_CHILD_GANG) | |
62840030 | 4119 | return (zio); |
b5256303 TC |
4120 | |
4121 | /* only ZIL blocks are re-encrypted on rewrite */ | |
4122 | if (!IO_IS_ALLOCATING(zio) && ot != DMU_OT_INTENT_LOG) | |
62840030 | 4123 | return (zio); |
b5256303 TC |
4124 | |
4125 | if (!(zp->zp_encrypt || BP_IS_ENCRYPTED(bp))) { | |
4126 | BP_SET_CRYPT(bp, B_FALSE); | |
62840030 | 4127 | return (zio); |
b5256303 TC |
4128 | } |
4129 | ||
4130 | /* if we are doing raw encryption set the provided encryption params */ | |
4131 | if (zio->io_flags & ZIO_FLAG_RAW_ENCRYPT) { | |
ae76f45c | 4132 | ASSERT0(BP_GET_LEVEL(bp)); |
b5256303 TC |
4133 | BP_SET_CRYPT(bp, B_TRUE); |
4134 | BP_SET_BYTEORDER(bp, zp->zp_byteorder); | |
4135 | if (ot != DMU_OT_OBJSET) | |
4136 | zio_crypt_encode_mac_bp(bp, zp->zp_mac); | |
ae76f45c TC |
4137 | |
4138 | /* dnode blocks must be written out in the provided byteorder */ | |
4139 | if (zp->zp_byteorder != ZFS_HOST_BYTEORDER && | |
4140 | ot == DMU_OT_DNODE) { | |
4141 | void *bswap_buf = zio_buf_alloc(psize); | |
4142 | abd_t *babd = abd_get_from_buf(bswap_buf, psize); | |
4143 | ||
4144 | ASSERT3U(BP_GET_COMPRESS(bp), ==, ZIO_COMPRESS_OFF); | |
4145 | abd_copy_to_buf(bswap_buf, zio->io_abd, psize); | |
4146 | dmu_ot_byteswap[DMU_OT_BYTESWAP(ot)].ob_func(bswap_buf, | |
4147 | psize); | |
4148 | ||
4149 | abd_take_ownership_of_buf(babd, B_TRUE); | |
4150 | zio_push_transform(zio, babd, psize, psize, NULL); | |
4151 | } | |
4152 | ||
b5256303 TC |
4153 | if (DMU_OT_IS_ENCRYPTED(ot)) |
4154 | zio_crypt_encode_params_bp(bp, zp->zp_salt, zp->zp_iv); | |
62840030 | 4155 | return (zio); |
b5256303 TC |
4156 | } |
4157 | ||
4158 | /* indirect blocks only maintain a cksum of the lower level MACs */ | |
4159 | if (BP_GET_LEVEL(bp) > 0) { | |
4160 | BP_SET_CRYPT(bp, B_TRUE); | |
4161 | VERIFY0(zio_crypt_do_indirect_mac_checksum_abd(B_TRUE, | |
4162 | zio->io_orig_abd, BP_GET_LSIZE(bp), BP_SHOULD_BYTESWAP(bp), | |
4163 | mac)); | |
4164 | zio_crypt_encode_mac_bp(bp, mac); | |
62840030 | 4165 | return (zio); |
b5256303 TC |
4166 | } |
4167 | ||
4168 | /* | |
4169 | * Objset blocks are a special case since they have 2 256-bit MACs | |
4170 | * embedded within them. | |
4171 | */ | |
4172 | if (ot == DMU_OT_OBJSET) { | |
4173 | ASSERT0(DMU_OT_IS_ENCRYPTED(ot)); | |
4174 | ASSERT3U(BP_GET_COMPRESS(bp), ==, ZIO_COMPRESS_OFF); | |
4175 | BP_SET_CRYPT(bp, B_TRUE); | |
ae76f45c TC |
4176 | VERIFY0(spa_do_crypt_objset_mac_abd(B_TRUE, spa, dsobj, |
4177 | zio->io_abd, psize, BP_SHOULD_BYTESWAP(bp))); | |
62840030 | 4178 | return (zio); |
b5256303 TC |
4179 | } |
4180 | ||
4181 | /* unencrypted object types are only authenticated with a MAC */ | |
4182 | if (!DMU_OT_IS_ENCRYPTED(ot)) { | |
4183 | BP_SET_CRYPT(bp, B_TRUE); | |
ae76f45c TC |
4184 | VERIFY0(spa_do_crypt_mac_abd(B_TRUE, spa, dsobj, |
4185 | zio->io_abd, psize, mac)); | |
b5256303 | 4186 | zio_crypt_encode_mac_bp(bp, mac); |
62840030 | 4187 | return (zio); |
b5256303 TC |
4188 | } |
4189 | ||
4190 | /* | |
4191 | * Later passes of sync-to-convergence may decide to rewrite data | |
4192 | * in place to avoid more disk reallocations. This presents a problem | |
d611989f | 4193 | * for encryption because this constitutes rewriting the new data with |
b5256303 TC |
4194 | * the same encryption key and IV. However, this only applies to blocks |
4195 | * in the MOS (particularly the spacemaps) and we do not encrypt the | |
4196 | * MOS. We assert that the zio is allocating or an intent log write | |
4197 | * to enforce this. | |
4198 | */ | |
4199 | ASSERT(IO_IS_ALLOCATING(zio) || ot == DMU_OT_INTENT_LOG); | |
4200 | ASSERT(BP_GET_LEVEL(bp) == 0 || ot == DMU_OT_INTENT_LOG); | |
4201 | ASSERT(spa_feature_is_active(spa, SPA_FEATURE_ENCRYPTION)); | |
4202 | ASSERT3U(psize, !=, 0); | |
4203 | ||
4204 | enc_buf = zio_buf_alloc(psize); | |
4205 | eabd = abd_get_from_buf(enc_buf, psize); | |
4206 | abd_take_ownership_of_buf(eabd, B_TRUE); | |
4207 | ||
4208 | /* | |
4209 | * For an explanation of what encryption parameters are stored | |
4210 | * where, see the block comment in zio_crypt.c. | |
4211 | */ | |
4212 | if (ot == DMU_OT_INTENT_LOG) { | |
4213 | zio_crypt_decode_params_bp(bp, salt, iv); | |
4214 | } else { | |
4215 | BP_SET_CRYPT(bp, B_TRUE); | |
4216 | } | |
4217 | ||
4218 | /* Perform the encryption. This should not fail */ | |
be9a5c35 TC |
4219 | VERIFY0(spa_do_crypt_abd(B_TRUE, spa, &zio->io_bookmark, |
4220 | BP_GET_TYPE(bp), BP_GET_DEDUP(bp), BP_SHOULD_BYTESWAP(bp), | |
4221 | salt, iv, mac, psize, zio->io_abd, eabd, &no_crypt)); | |
b5256303 TC |
4222 | |
4223 | /* encode encryption metadata into the bp */ | |
4224 | if (ot == DMU_OT_INTENT_LOG) { | |
4225 | /* | |
4226 | * ZIL blocks store the MAC in the embedded checksum, so the | |
4227 | * transform must always be applied. | |
4228 | */ | |
4229 | zio_crypt_encode_mac_zil(enc_buf, mac); | |
4230 | zio_push_transform(zio, eabd, psize, psize, NULL); | |
4231 | } else { | |
4232 | BP_SET_CRYPT(bp, B_TRUE); | |
4233 | zio_crypt_encode_params_bp(bp, salt, iv); | |
4234 | zio_crypt_encode_mac_bp(bp, mac); | |
4235 | ||
4236 | if (no_crypt) { | |
4237 | ASSERT3U(ot, ==, DMU_OT_DNODE); | |
4238 | abd_free(eabd); | |
4239 | } else { | |
4240 | zio_push_transform(zio, eabd, psize, psize, NULL); | |
4241 | } | |
4242 | } | |
4243 | ||
62840030 | 4244 | return (zio); |
b5256303 TC |
4245 | } |
4246 | ||
34dc7c2f BB |
4247 | /* |
4248 | * ========================================================================== | |
4249 | * Generate and verify checksums | |
4250 | * ========================================================================== | |
4251 | */ | |
62840030 | 4252 | static zio_t * |
34dc7c2f BB |
4253 | zio_checksum_generate(zio_t *zio) |
4254 | { | |
34dc7c2f | 4255 | blkptr_t *bp = zio->io_bp; |
b128c09f | 4256 | enum zio_checksum checksum; |
34dc7c2f | 4257 | |
b128c09f BB |
4258 | if (bp == NULL) { |
4259 | /* | |
4260 | * This is zio_write_phys(). | |
4261 | * We're either generating a label checksum, or none at all. | |
4262 | */ | |
4263 | checksum = zio->io_prop.zp_checksum; | |
34dc7c2f | 4264 | |
b128c09f | 4265 | if (checksum == ZIO_CHECKSUM_OFF) |
62840030 | 4266 | return (zio); |
b128c09f BB |
4267 | |
4268 | ASSERT(checksum == ZIO_CHECKSUM_LABEL); | |
4269 | } else { | |
4270 | if (BP_IS_GANG(bp) && zio->io_child_type == ZIO_CHILD_GANG) { | |
4271 | ASSERT(!IO_IS_ALLOCATING(zio)); | |
4272 | checksum = ZIO_CHECKSUM_GANG_HEADER; | |
4273 | } else { | |
4274 | checksum = BP_GET_CHECKSUM(bp); | |
4275 | } | |
4276 | } | |
34dc7c2f | 4277 | |
a6255b7f | 4278 | zio_checksum_compute(zio, checksum, zio->io_abd, zio->io_size); |
34dc7c2f | 4279 | |
62840030 | 4280 | return (zio); |
34dc7c2f BB |
4281 | } |
4282 | ||
62840030 | 4283 | static zio_t * |
b128c09f | 4284 | zio_checksum_verify(zio_t *zio) |
34dc7c2f | 4285 | { |
428870ff | 4286 | zio_bad_cksum_t info; |
b128c09f BB |
4287 | blkptr_t *bp = zio->io_bp; |
4288 | int error; | |
34dc7c2f | 4289 | |
428870ff BB |
4290 | ASSERT(zio->io_vd != NULL); |
4291 | ||
b128c09f BB |
4292 | if (bp == NULL) { |
4293 | /* | |
4294 | * This is zio_read_phys(). | |
4295 | * We're either verifying a label checksum, or nothing at all. | |
4296 | */ | |
4297 | if (zio->io_prop.zp_checksum == ZIO_CHECKSUM_OFF) | |
62840030 | 4298 | return (zio); |
34dc7c2f | 4299 | |
b2255edc | 4300 | ASSERT3U(zio->io_prop.zp_checksum, ==, ZIO_CHECKSUM_LABEL); |
b128c09f | 4301 | } |
34dc7c2f | 4302 | |
428870ff | 4303 | if ((error = zio_checksum_error(zio, &info)) != 0) { |
b128c09f | 4304 | zio->io_error = error; |
7a3066ff MA |
4305 | if (error == ECKSUM && |
4306 | !(zio->io_flags & ZIO_FLAG_SPECULATIVE)) { | |
03e02e5b | 4307 | (void) zfs_ereport_start_checksum(zio->io_spa, |
b5256303 | 4308 | zio->io_vd, &zio->io_bookmark, zio, |
330c6c05 | 4309 | zio->io_offset, zio->io_size, &info); |
03e02e5b DB |
4310 | mutex_enter(&zio->io_vd->vdev_stat_lock); |
4311 | zio->io_vd->vdev_stat.vs_checksum_errors++; | |
4312 | mutex_exit(&zio->io_vd->vdev_stat_lock); | |
b128c09f | 4313 | } |
34dc7c2f BB |
4314 | } |
4315 | ||
62840030 | 4316 | return (zio); |
34dc7c2f BB |
4317 | } |
4318 | ||
4319 | /* | |
4320 | * Called by RAID-Z to ensure we don't compute the checksum twice. | |
4321 | */ | |
4322 | void | |
4323 | zio_checksum_verified(zio_t *zio) | |
4324 | { | |
428870ff | 4325 | zio->io_pipeline &= ~ZIO_STAGE_CHECKSUM_VERIFY; |
34dc7c2f BB |
4326 | } |
4327 | ||
4328 | /* | |
b128c09f BB |
4329 | * ========================================================================== |
4330 | * Error rank. Error are ranked in the order 0, ENXIO, ECKSUM, EIO, other. | |
9b67f605 | 4331 | * An error of 0 indicates success. ENXIO indicates whole-device failure, |
d611989f | 4332 | * which may be transient (e.g. unplugged) or permanent. ECKSUM and EIO |
b128c09f BB |
4333 | * indicate errors that are specific to one I/O, and most likely permanent. |
4334 | * Any other error is presumed to be worse because we weren't expecting it. | |
4335 | * ========================================================================== | |
34dc7c2f | 4336 | */ |
b128c09f BB |
4337 | int |
4338 | zio_worst_error(int e1, int e2) | |
34dc7c2f | 4339 | { |
b128c09f BB |
4340 | static int zio_error_rank[] = { 0, ENXIO, ECKSUM, EIO }; |
4341 | int r1, r2; | |
4342 | ||
4343 | for (r1 = 0; r1 < sizeof (zio_error_rank) / sizeof (int); r1++) | |
4344 | if (e1 == zio_error_rank[r1]) | |
4345 | break; | |
34dc7c2f | 4346 | |
b128c09f BB |
4347 | for (r2 = 0; r2 < sizeof (zio_error_rank) / sizeof (int); r2++) |
4348 | if (e2 == zio_error_rank[r2]) | |
4349 | break; | |
4350 | ||
4351 | return (r1 > r2 ? e1 : e2); | |
34dc7c2f BB |
4352 | } |
4353 | ||
4354 | /* | |
4355 | * ========================================================================== | |
b128c09f | 4356 | * I/O completion |
34dc7c2f BB |
4357 | * ========================================================================== |
4358 | */ | |
62840030 | 4359 | static zio_t * |
b128c09f | 4360 | zio_ready(zio_t *zio) |
34dc7c2f | 4361 | { |
b128c09f | 4362 | blkptr_t *bp = zio->io_bp; |
d164b209 | 4363 | zio_t *pio, *pio_next; |
3dfb57a3 | 4364 | zio_link_t *zl = NULL; |
34dc7c2f | 4365 | |
ddc751d5 GW |
4366 | if (zio_wait_for_children(zio, ZIO_CHILD_GANG_BIT | ZIO_CHILD_DDT_BIT, |
4367 | ZIO_WAIT_READY)) { | |
62840030 | 4368 | return (NULL); |
ddc751d5 | 4369 | } |
34dc7c2f | 4370 | |
9babb374 | 4371 | if (zio->io_ready) { |
b128c09f | 4372 | ASSERT(IO_IS_ALLOCATING(zio)); |
03c6040b GW |
4373 | ASSERT(bp->blk_birth == zio->io_txg || BP_IS_HOLE(bp) || |
4374 | (zio->io_flags & ZIO_FLAG_NOPWRITE)); | |
b128c09f | 4375 | ASSERT(zio->io_children[ZIO_CHILD_GANG][ZIO_WAIT_READY] == 0); |
34dc7c2f | 4376 | |
b128c09f BB |
4377 | zio->io_ready(zio); |
4378 | } | |
34dc7c2f | 4379 | |
b128c09f BB |
4380 | if (bp != NULL && bp != &zio->io_bp_copy) |
4381 | zio->io_bp_copy = *bp; | |
34dc7c2f | 4382 | |
3dfb57a3 | 4383 | if (zio->io_error != 0) { |
b128c09f | 4384 | zio->io_pipeline = ZIO_INTERLOCK_PIPELINE; |
34dc7c2f | 4385 | |
3dfb57a3 DB |
4386 | if (zio->io_flags & ZIO_FLAG_IO_ALLOCATING) { |
4387 | ASSERT(IO_IS_ALLOCATING(zio)); | |
4388 | ASSERT(zio->io_priority == ZIO_PRIORITY_ASYNC_WRITE); | |
cc99f275 DB |
4389 | ASSERT(zio->io_metaslab_class != NULL); |
4390 | ||
3dfb57a3 DB |
4391 | /* |
4392 | * We were unable to allocate anything, unreserve and | |
4393 | * issue the next I/O to allocate. | |
4394 | */ | |
4395 | metaslab_class_throttle_unreserve( | |
cc99f275 DB |
4396 | zio->io_metaslab_class, zio->io_prop.zp_copies, |
4397 | zio->io_allocator, zio); | |
492f64e9 | 4398 | zio_allocate_dispatch(zio->io_spa, zio->io_allocator); |
3dfb57a3 DB |
4399 | } |
4400 | } | |
4401 | ||
d164b209 BB |
4402 | mutex_enter(&zio->io_lock); |
4403 | zio->io_state[ZIO_WAIT_READY] = 1; | |
3dfb57a3 | 4404 | pio = zio_walk_parents(zio, &zl); |
d164b209 BB |
4405 | mutex_exit(&zio->io_lock); |
4406 | ||
4407 | /* | |
4408 | * As we notify zio's parents, new parents could be added. | |
4409 | * New parents go to the head of zio's io_parent_list, however, | |
4410 | * so we will (correctly) not notify them. The remainder of zio's | |
4411 | * io_parent_list, from 'pio_next' onward, cannot change because | |
4412 | * all parents must wait for us to be done before they can be done. | |
4413 | */ | |
4414 | for (; pio != NULL; pio = pio_next) { | |
3dfb57a3 | 4415 | pio_next = zio_walk_parents(zio, &zl); |
62840030 | 4416 | zio_notify_parent(pio, zio, ZIO_WAIT_READY, NULL); |
d164b209 | 4417 | } |
34dc7c2f | 4418 | |
428870ff BB |
4419 | if (zio->io_flags & ZIO_FLAG_NODATA) { |
4420 | if (BP_IS_GANG(bp)) { | |
4421 | zio->io_flags &= ~ZIO_FLAG_NODATA; | |
4422 | } else { | |
a6255b7f | 4423 | ASSERT((uintptr_t)zio->io_abd < SPA_MAXBLOCKSIZE); |
428870ff BB |
4424 | zio->io_pipeline &= ~ZIO_VDEV_IO_STAGES; |
4425 | } | |
4426 | } | |
4427 | ||
4428 | if (zio_injection_enabled && | |
4429 | zio->io_spa->spa_syncing_txg == zio->io_txg) | |
4430 | zio_handle_ignored_writes(zio); | |
4431 | ||
62840030 | 4432 | return (zio); |
34dc7c2f BB |
4433 | } |
4434 | ||
3dfb57a3 DB |
4435 | /* |
4436 | * Update the allocation throttle accounting. | |
4437 | */ | |
4438 | static void | |
4439 | zio_dva_throttle_done(zio_t *zio) | |
4440 | { | |
2a8ba608 | 4441 | zio_t *lio __maybe_unused = zio->io_logical; |
3dfb57a3 DB |
4442 | zio_t *pio = zio_unique_parent(zio); |
4443 | vdev_t *vd = zio->io_vd; | |
4444 | int flags = METASLAB_ASYNC_ALLOC; | |
4445 | ||
4446 | ASSERT3P(zio->io_bp, !=, NULL); | |
4447 | ASSERT3U(zio->io_type, ==, ZIO_TYPE_WRITE); | |
4448 | ASSERT3U(zio->io_priority, ==, ZIO_PRIORITY_ASYNC_WRITE); | |
4449 | ASSERT3U(zio->io_child_type, ==, ZIO_CHILD_VDEV); | |
4450 | ASSERT(vd != NULL); | |
4451 | ASSERT3P(vd, ==, vd->vdev_top); | |
21df134f SB |
4452 | ASSERT(zio_injection_enabled || !(zio->io_flags & ZIO_FLAG_IO_RETRY)); |
4453 | ASSERT(!(zio->io_flags & ZIO_FLAG_IO_REPAIR)); | |
3dfb57a3 DB |
4454 | ASSERT(zio->io_flags & ZIO_FLAG_IO_ALLOCATING); |
4455 | ASSERT(!(lio->io_flags & ZIO_FLAG_IO_REWRITE)); | |
4456 | ASSERT(!(lio->io_orig_flags & ZIO_FLAG_NODATA)); | |
4457 | ||
4458 | /* | |
4459 | * Parents of gang children can have two flavors -- ones that | |
4460 | * allocated the gang header (will have ZIO_FLAG_IO_REWRITE set) | |
4461 | * and ones that allocated the constituent blocks. The allocation | |
4462 | * throttle needs to know the allocating parent zio so we must find | |
4463 | * it here. | |
4464 | */ | |
4465 | if (pio->io_child_type == ZIO_CHILD_GANG) { | |
4466 | /* | |
4467 | * If our parent is a rewrite gang child then our grandparent | |
4468 | * would have been the one that performed the allocation. | |
4469 | */ | |
4470 | if (pio->io_flags & ZIO_FLAG_IO_REWRITE) | |
4471 | pio = zio_unique_parent(pio); | |
4472 | flags |= METASLAB_GANG_CHILD; | |
4473 | } | |
4474 | ||
4475 | ASSERT(IO_IS_ALLOCATING(pio)); | |
4476 | ASSERT3P(zio, !=, zio->io_logical); | |
4477 | ASSERT(zio->io_logical != NULL); | |
4478 | ASSERT(!(zio->io_flags & ZIO_FLAG_IO_REPAIR)); | |
4479 | ASSERT0(zio->io_flags & ZIO_FLAG_NOPWRITE); | |
cc99f275 | 4480 | ASSERT(zio->io_metaslab_class != NULL); |
3dfb57a3 DB |
4481 | |
4482 | mutex_enter(&pio->io_lock); | |
492f64e9 PD |
4483 | metaslab_group_alloc_decrement(zio->io_spa, vd->vdev_id, pio, flags, |
4484 | pio->io_allocator, B_TRUE); | |
3dfb57a3 DB |
4485 | mutex_exit(&pio->io_lock); |
4486 | ||
cc99f275 DB |
4487 | metaslab_class_throttle_unreserve(zio->io_metaslab_class, 1, |
4488 | pio->io_allocator, pio); | |
3dfb57a3 DB |
4489 | |
4490 | /* | |
4491 | * Call into the pipeline to see if there is more work that | |
4492 | * needs to be done. If there is work to be done it will be | |
4493 | * dispatched to another taskq thread. | |
4494 | */ | |
492f64e9 | 4495 | zio_allocate_dispatch(zio->io_spa, pio->io_allocator); |
3dfb57a3 DB |
4496 | } |
4497 | ||
62840030 | 4498 | static zio_t * |
b128c09f | 4499 | zio_done(zio_t *zio) |
34dc7c2f | 4500 | { |
3dfb57a3 DB |
4501 | /* |
4502 | * Always attempt to keep stack usage minimal here since | |
d611989f | 4503 | * we can be called recursively up to 19 levels deep. |
3dfb57a3 | 4504 | */ |
84c07ada | 4505 | const uint64_t psize = zio->io_size; |
d164b209 | 4506 | zio_t *pio, *pio_next; |
3dfb57a3 | 4507 | zio_link_t *zl = NULL; |
34dc7c2f | 4508 | |
b128c09f | 4509 | /* |
9babb374 | 4510 | * If our children haven't all completed, |
b128c09f BB |
4511 | * wait for them and then repeat this pipeline stage. |
4512 | */ | |
ddc751d5 | 4513 | if (zio_wait_for_children(zio, ZIO_CHILD_ALL_BITS, ZIO_WAIT_DONE)) { |
62840030 | 4514 | return (NULL); |
ddc751d5 | 4515 | } |
34dc7c2f | 4516 | |
3dfb57a3 DB |
4517 | /* |
4518 | * If the allocation throttle is enabled, then update the accounting. | |
4519 | * We only track child I/Os that are part of an allocating async | |
4520 | * write. We must do this since the allocation is performed | |
4521 | * by the logical I/O but the actual write is done by child I/Os. | |
4522 | */ | |
4523 | if (zio->io_flags & ZIO_FLAG_IO_ALLOCATING && | |
4524 | zio->io_child_type == ZIO_CHILD_VDEV) { | |
cc99f275 DB |
4525 | ASSERT(zio->io_metaslab_class != NULL); |
4526 | ASSERT(zio->io_metaslab_class->mc_alloc_throttle_enabled); | |
3dfb57a3 DB |
4527 | zio_dva_throttle_done(zio); |
4528 | } | |
4529 | ||
4530 | /* | |
4531 | * If the allocation throttle is enabled, verify that | |
4532 | * we have decremented the refcounts for every I/O that was throttled. | |
4533 | */ | |
4534 | if (zio->io_flags & ZIO_FLAG_IO_ALLOCATING) { | |
4535 | ASSERT(zio->io_type == ZIO_TYPE_WRITE); | |
4536 | ASSERT(zio->io_priority == ZIO_PRIORITY_ASYNC_WRITE); | |
4537 | ASSERT(zio->io_bp != NULL); | |
cc99f275 | 4538 | |
492f64e9 PD |
4539 | metaslab_group_alloc_verify(zio->io_spa, zio->io_bp, zio, |
4540 | zio->io_allocator); | |
f8020c93 AM |
4541 | VERIFY(zfs_refcount_not_held(&zio->io_metaslab_class-> |
4542 | mc_allocator[zio->io_allocator].mca_alloc_slots, zio)); | |
3dfb57a3 DB |
4543 | } |
4544 | ||
4545 | ||
1c27024e DB |
4546 | for (int c = 0; c < ZIO_CHILD_TYPES; c++) |
4547 | for (int w = 0; w < ZIO_WAIT_TYPES; w++) | |
b128c09f BB |
4548 | ASSERT(zio->io_children[c][w] == 0); |
4549 | ||
9b67f605 | 4550 | if (zio->io_bp != NULL && !BP_IS_EMBEDDED(zio->io_bp)) { |
c776b317 BB |
4551 | ASSERT(zio->io_bp->blk_pad[0] == 0); |
4552 | ASSERT(zio->io_bp->blk_pad[1] == 0); | |
861166b0 | 4553 | ASSERT(memcmp(zio->io_bp, &zio->io_bp_copy, |
d1d7e268 | 4554 | sizeof (blkptr_t)) == 0 || |
c776b317 BB |
4555 | (zio->io_bp == zio_unique_parent(zio)->io_bp)); |
4556 | if (zio->io_type == ZIO_TYPE_WRITE && !BP_IS_HOLE(zio->io_bp) && | |
428870ff | 4557 | zio->io_bp_override == NULL && |
b128c09f | 4558 | !(zio->io_flags & ZIO_FLAG_IO_REPAIR)) { |
d1d7e268 MK |
4559 | ASSERT3U(zio->io_prop.zp_copies, <=, |
4560 | BP_GET_NDVAS(zio->io_bp)); | |
c776b317 | 4561 | ASSERT(BP_COUNT_GANG(zio->io_bp) == 0 || |
d1d7e268 MK |
4562 | (BP_COUNT_GANG(zio->io_bp) == |
4563 | BP_GET_NDVAS(zio->io_bp))); | |
b128c09f | 4564 | } |
03c6040b GW |
4565 | if (zio->io_flags & ZIO_FLAG_NOPWRITE) |
4566 | VERIFY(BP_EQUAL(zio->io_bp, &zio->io_bp_orig)); | |
b128c09f BB |
4567 | } |
4568 | ||
4569 | /* | |
428870ff | 4570 | * If there were child vdev/gang/ddt errors, they apply to us now. |
b128c09f BB |
4571 | */ |
4572 | zio_inherit_child_errors(zio, ZIO_CHILD_VDEV); | |
4573 | zio_inherit_child_errors(zio, ZIO_CHILD_GANG); | |
428870ff BB |
4574 | zio_inherit_child_errors(zio, ZIO_CHILD_DDT); |
4575 | ||
4576 | /* | |
4577 | * If the I/O on the transformed data was successful, generate any | |
4578 | * checksum reports now while we still have the transformed data. | |
4579 | */ | |
4580 | if (zio->io_error == 0) { | |
4581 | while (zio->io_cksum_report != NULL) { | |
4582 | zio_cksum_report_t *zcr = zio->io_cksum_report; | |
4583 | uint64_t align = zcr->zcr_align; | |
a6255b7f | 4584 | uint64_t asize = P2ROUNDUP(psize, align); |
a6255b7f DQ |
4585 | abd_t *adata = zio->io_abd; |
4586 | ||
f2286383 | 4587 | if (adata != NULL && asize != psize) { |
84c07ada | 4588 | adata = abd_alloc(asize, B_TRUE); |
a6255b7f DQ |
4589 | abd_copy(adata, zio->io_abd, psize); |
4590 | abd_zero_off(adata, psize, asize - psize); | |
428870ff BB |
4591 | } |
4592 | ||
4593 | zio->io_cksum_report = zcr->zcr_next; | |
4594 | zcr->zcr_next = NULL; | |
84c07ada | 4595 | zcr->zcr_finish(zcr, adata); |
428870ff BB |
4596 | zfs_ereport_free_checksum(zcr); |
4597 | ||
f2286383 | 4598 | if (adata != NULL && asize != psize) |
a6255b7f | 4599 | abd_free(adata); |
428870ff BB |
4600 | } |
4601 | } | |
b128c09f BB |
4602 | |
4603 | zio_pop_transforms(zio); /* note: may set zio->io_error */ | |
4604 | ||
a6255b7f | 4605 | vdev_stat_update(zio, psize); |
b128c09f | 4606 | |
a69052be | 4607 | /* |
cc92e9d0 | 4608 | * If this I/O is attached to a particular vdev is slow, exceeding |
72f53c56 MJ |
4609 | * 30 seconds to complete, post an error described the I/O delay. |
4610 | * We ignore these errors if the device is currently unavailable. | |
a69052be | 4611 | */ |
ad796b8a TH |
4612 | if (zio->io_delay >= MSEC2NSEC(zio_slow_io_ms)) { |
4613 | if (zio->io_vd != NULL && !vdev_is_dead(zio->io_vd)) { | |
4614 | /* | |
4615 | * We want to only increment our slow IO counters if | |
4616 | * the IO is valid (i.e. not if the drive is removed). | |
4617 | * | |
4618 | * zfs_ereport_post() will also do these checks, but | |
4619 | * it can also ratelimit and have other failures, so we | |
4620 | * need to increment the slow_io counters independent | |
4621 | * of it. | |
4622 | */ | |
4623 | if (zfs_ereport_is_valid(FM_EREPORT_ZFS_DELAY, | |
4624 | zio->io_spa, zio->io_vd, zio)) { | |
4625 | mutex_enter(&zio->io_vd->vdev_stat_lock); | |
4626 | zio->io_vd->vdev_stat.vs_slow_ios++; | |
4627 | mutex_exit(&zio->io_vd->vdev_stat_lock); | |
4628 | ||
1144586b | 4629 | (void) zfs_ereport_post(FM_EREPORT_ZFS_DELAY, |
ad796b8a | 4630 | zio->io_spa, zio->io_vd, &zio->io_bookmark, |
4f072827 | 4631 | zio, 0); |
ad796b8a TH |
4632 | } |
4633 | } | |
72f53c56 | 4634 | } |
a69052be | 4635 | |
b128c09f BB |
4636 | if (zio->io_error) { |
4637 | /* | |
4638 | * If this I/O is attached to a particular vdev, | |
4639 | * generate an error message describing the I/O failure | |
4640 | * at the block level. We ignore these errors if the | |
4641 | * device is currently unavailable. | |
4642 | */ | |
c776b317 | 4643 | if (zio->io_error != ECKSUM && zio->io_vd != NULL && |
2bbec1c9 | 4644 | !vdev_is_dead(zio->io_vd)) { |
4f072827 DB |
4645 | int ret = zfs_ereport_post(FM_EREPORT_ZFS_IO, |
4646 | zio->io_spa, zio->io_vd, &zio->io_bookmark, zio, 0); | |
4647 | if (ret != EALREADY) { | |
4648 | mutex_enter(&zio->io_vd->vdev_stat_lock); | |
4649 | if (zio->io_type == ZIO_TYPE_READ) | |
4650 | zio->io_vd->vdev_stat.vs_read_errors++; | |
4651 | else if (zio->io_type == ZIO_TYPE_WRITE) | |
4652 | zio->io_vd->vdev_stat.vs_write_errors++; | |
4653 | mutex_exit(&zio->io_vd->vdev_stat_lock); | |
2bbec1c9 | 4654 | } |
2bbec1c9 | 4655 | } |
34dc7c2f | 4656 | |
428870ff BB |
4657 | if ((zio->io_error == EIO || !(zio->io_flags & |
4658 | (ZIO_FLAG_SPECULATIVE | ZIO_FLAG_DONT_PROPAGATE))) && | |
c776b317 | 4659 | zio == zio->io_logical) { |
b128c09f BB |
4660 | /* |
4661 | * For logical I/O requests, tell the SPA to log the | |
4662 | * error and generate a logical data ereport. | |
4663 | */ | |
b5256303 | 4664 | spa_log_error(zio->io_spa, &zio->io_bookmark); |
1144586b | 4665 | (void) zfs_ereport_post(FM_EREPORT_ZFS_DATA, |
4f072827 | 4666 | zio->io_spa, NULL, &zio->io_bookmark, zio, 0); |
b128c09f BB |
4667 | } |
4668 | } | |
34dc7c2f | 4669 | |
c776b317 | 4670 | if (zio->io_error && zio == zio->io_logical) { |
b128c09f BB |
4671 | /* |
4672 | * Determine whether zio should be reexecuted. This will | |
4673 | * propagate all the way to the root via zio_notify_parent(). | |
4674 | */ | |
c776b317 | 4675 | ASSERT(zio->io_vd == NULL && zio->io_bp != NULL); |
428870ff | 4676 | ASSERT(zio->io_child_type == ZIO_CHILD_LOGICAL); |
b128c09f | 4677 | |
428870ff BB |
4678 | if (IO_IS_ALLOCATING(zio) && |
4679 | !(zio->io_flags & ZIO_FLAG_CANFAIL)) { | |
b128c09f BB |
4680 | if (zio->io_error != ENOSPC) |
4681 | zio->io_reexecute |= ZIO_REEXECUTE_NOW; | |
4682 | else | |
4683 | zio->io_reexecute |= ZIO_REEXECUTE_SUSPEND; | |
428870ff | 4684 | } |
b128c09f BB |
4685 | |
4686 | if ((zio->io_type == ZIO_TYPE_READ || | |
4687 | zio->io_type == ZIO_TYPE_FREE) && | |
572e2857 | 4688 | !(zio->io_flags & ZIO_FLAG_SCAN_THREAD) && |
b128c09f | 4689 | zio->io_error == ENXIO && |
c776b317 BB |
4690 | spa_load_state(zio->io_spa) == SPA_LOAD_NONE && |
4691 | spa_get_failmode(zio->io_spa) != ZIO_FAILURE_MODE_CONTINUE) | |
b128c09f BB |
4692 | zio->io_reexecute |= ZIO_REEXECUTE_SUSPEND; |
4693 | ||
4694 | if (!(zio->io_flags & ZIO_FLAG_CANFAIL) && !zio->io_reexecute) | |
4695 | zio->io_reexecute |= ZIO_REEXECUTE_SUSPEND; | |
428870ff BB |
4696 | |
4697 | /* | |
4698 | * Here is a possibly good place to attempt to do | |
4699 | * either combinatorial reconstruction or error correction | |
4700 | * based on checksums. It also might be a good place | |
4701 | * to send out preliminary ereports before we suspend | |
4702 | * processing. | |
4703 | */ | |
34dc7c2f BB |
4704 | } |
4705 | ||
4706 | /* | |
b128c09f BB |
4707 | * If there were logical child errors, they apply to us now. |
4708 | * We defer this until now to avoid conflating logical child | |
4709 | * errors with errors that happened to the zio itself when | |
4710 | * updating vdev stats and reporting FMA events above. | |
34dc7c2f | 4711 | */ |
b128c09f | 4712 | zio_inherit_child_errors(zio, ZIO_CHILD_LOGICAL); |
34dc7c2f | 4713 | |
428870ff BB |
4714 | if ((zio->io_error || zio->io_reexecute) && |
4715 | IO_IS_ALLOCATING(zio) && zio->io_gang_leader == zio && | |
03c6040b | 4716 | !(zio->io_flags & (ZIO_FLAG_IO_REWRITE | ZIO_FLAG_NOPWRITE))) |
c776b317 | 4717 | zio_dva_unallocate(zio, zio->io_gang_tree, zio->io_bp); |
9babb374 BB |
4718 | |
4719 | zio_gang_tree_free(&zio->io_gang_tree); | |
4720 | ||
4721 | /* | |
4722 | * Godfather I/Os should never suspend. | |
4723 | */ | |
4724 | if ((zio->io_flags & ZIO_FLAG_GODFATHER) && | |
4725 | (zio->io_reexecute & ZIO_REEXECUTE_SUSPEND)) | |
a32494d2 | 4726 | zio->io_reexecute &= ~ZIO_REEXECUTE_SUSPEND; |
9babb374 | 4727 | |
b128c09f BB |
4728 | if (zio->io_reexecute) { |
4729 | /* | |
4730 | * This is a logical I/O that wants to reexecute. | |
4731 | * | |
4732 | * Reexecute is top-down. When an i/o fails, if it's not | |
4733 | * the root, it simply notifies its parent and sticks around. | |
4734 | * The parent, seeing that it still has children in zio_done(), | |
4735 | * does the same. This percolates all the way up to the root. | |
4736 | * The root i/o will reexecute or suspend the entire tree. | |
4737 | * | |
4738 | * This approach ensures that zio_reexecute() honors | |
4739 | * all the original i/o dependency relationships, e.g. | |
4740 | * parents not executing until children are ready. | |
4741 | */ | |
4742 | ASSERT(zio->io_child_type == ZIO_CHILD_LOGICAL); | |
34dc7c2f | 4743 | |
9babb374 | 4744 | zio->io_gang_leader = NULL; |
b128c09f | 4745 | |
d164b209 BB |
4746 | mutex_enter(&zio->io_lock); |
4747 | zio->io_state[ZIO_WAIT_DONE] = 1; | |
4748 | mutex_exit(&zio->io_lock); | |
4749 | ||
9babb374 BB |
4750 | /* |
4751 | * "The Godfather" I/O monitors its children but is | |
4752 | * not a true parent to them. It will track them through | |
4753 | * the pipeline but severs its ties whenever they get into | |
4754 | * trouble (e.g. suspended). This allows "The Godfather" | |
4755 | * I/O to return status without blocking. | |
4756 | */ | |
3dfb57a3 DB |
4757 | zl = NULL; |
4758 | for (pio = zio_walk_parents(zio, &zl); pio != NULL; | |
4759 | pio = pio_next) { | |
4760 | zio_link_t *remove_zl = zl; | |
4761 | pio_next = zio_walk_parents(zio, &zl); | |
9babb374 BB |
4762 | |
4763 | if ((pio->io_flags & ZIO_FLAG_GODFATHER) && | |
4764 | (zio->io_reexecute & ZIO_REEXECUTE_SUSPEND)) { | |
3dfb57a3 | 4765 | zio_remove_child(pio, zio, remove_zl); |
62840030 MA |
4766 | /* |
4767 | * This is a rare code path, so we don't | |
4768 | * bother with "next_to_execute". | |
4769 | */ | |
4770 | zio_notify_parent(pio, zio, ZIO_WAIT_DONE, | |
4771 | NULL); | |
9babb374 BB |
4772 | } |
4773 | } | |
4774 | ||
d164b209 | 4775 | if ((pio = zio_unique_parent(zio)) != NULL) { |
b128c09f BB |
4776 | /* |
4777 | * We're not a root i/o, so there's nothing to do | |
4778 | * but notify our parent. Don't propagate errors | |
4779 | * upward since we haven't permanently failed yet. | |
4780 | */ | |
9babb374 | 4781 | ASSERT(!(zio->io_flags & ZIO_FLAG_GODFATHER)); |
b128c09f | 4782 | zio->io_flags |= ZIO_FLAG_DONT_PROPAGATE; |
62840030 MA |
4783 | /* |
4784 | * This is a rare code path, so we don't bother with | |
4785 | * "next_to_execute". | |
4786 | */ | |
4787 | zio_notify_parent(pio, zio, ZIO_WAIT_DONE, NULL); | |
b128c09f BB |
4788 | } else if (zio->io_reexecute & ZIO_REEXECUTE_SUSPEND) { |
4789 | /* | |
4790 | * We'd fail again if we reexecuted now, so suspend | |
4791 | * until conditions improve (e.g. device comes online). | |
4792 | */ | |
cec3a0a1 | 4793 | zio_suspend(zio->io_spa, zio, ZIO_SUSPEND_IOERR); |
b128c09f BB |
4794 | } else { |
4795 | /* | |
4796 | * Reexecution is potentially a huge amount of work. | |
4797 | * Hand it off to the otherwise-unused claim taskq. | |
4798 | */ | |
a38718a6 | 4799 | ASSERT(taskq_empty_ent(&zio->io_tqent)); |
7ef5e54e AL |
4800 | spa_taskq_dispatch_ent(zio->io_spa, |
4801 | ZIO_TYPE_CLAIM, ZIO_TASKQ_ISSUE, | |
23c13c7e | 4802 | zio_reexecute, zio, 0, &zio->io_tqent); |
b128c09f | 4803 | } |
62840030 | 4804 | return (NULL); |
34dc7c2f BB |
4805 | } |
4806 | ||
428870ff | 4807 | ASSERT(zio->io_child_count == 0); |
b128c09f BB |
4808 | ASSERT(zio->io_reexecute == 0); |
4809 | ASSERT(zio->io_error == 0 || (zio->io_flags & ZIO_FLAG_CANFAIL)); | |
34dc7c2f | 4810 | |
428870ff BB |
4811 | /* |
4812 | * Report any checksum errors, since the I/O is complete. | |
4813 | */ | |
4814 | while (zio->io_cksum_report != NULL) { | |
4815 | zio_cksum_report_t *zcr = zio->io_cksum_report; | |
4816 | zio->io_cksum_report = zcr->zcr_next; | |
4817 | zcr->zcr_next = NULL; | |
4818 | zcr->zcr_finish(zcr, NULL); | |
4819 | zfs_ereport_free_checksum(zcr); | |
4820 | } | |
4821 | ||
920dd524 | 4822 | if (zio->io_flags & ZIO_FLAG_FASTWRITE && zio->io_bp && |
9b67f605 MA |
4823 | !BP_IS_HOLE(zio->io_bp) && !BP_IS_EMBEDDED(zio->io_bp) && |
4824 | !(zio->io_flags & ZIO_FLAG_NOPWRITE)) { | |
920dd524 ED |
4825 | metaslab_fastwrite_unmark(zio->io_spa, zio->io_bp); |
4826 | } | |
4827 | ||
d164b209 BB |
4828 | /* |
4829 | * It is the responsibility of the done callback to ensure that this | |
4830 | * particular zio is no longer discoverable for adoption, and as | |
4831 | * such, cannot acquire any new parents. | |
4832 | */ | |
b128c09f BB |
4833 | if (zio->io_done) |
4834 | zio->io_done(zio); | |
34dc7c2f | 4835 | |
d164b209 BB |
4836 | mutex_enter(&zio->io_lock); |
4837 | zio->io_state[ZIO_WAIT_DONE] = 1; | |
4838 | mutex_exit(&zio->io_lock); | |
34dc7c2f | 4839 | |
62840030 MA |
4840 | /* |
4841 | * We are done executing this zio. We may want to execute a parent | |
4842 | * next. See the comment in zio_notify_parent(). | |
4843 | */ | |
4844 | zio_t *next_to_execute = NULL; | |
3dfb57a3 DB |
4845 | zl = NULL; |
4846 | for (pio = zio_walk_parents(zio, &zl); pio != NULL; pio = pio_next) { | |
4847 | zio_link_t *remove_zl = zl; | |
4848 | pio_next = zio_walk_parents(zio, &zl); | |
4849 | zio_remove_child(pio, zio, remove_zl); | |
62840030 | 4850 | zio_notify_parent(pio, zio, ZIO_WAIT_DONE, &next_to_execute); |
b128c09f | 4851 | } |
34dc7c2f | 4852 | |
b128c09f BB |
4853 | if (zio->io_waiter != NULL) { |
4854 | mutex_enter(&zio->io_lock); | |
4855 | zio->io_executor = NULL; | |
4856 | cv_broadcast(&zio->io_cv); | |
4857 | mutex_exit(&zio->io_lock); | |
4858 | } else { | |
4859 | zio_destroy(zio); | |
4860 | } | |
34dc7c2f | 4861 | |
62840030 | 4862 | return (next_to_execute); |
34dc7c2f BB |
4863 | } |
4864 | ||
4865 | /* | |
b128c09f BB |
4866 | * ========================================================================== |
4867 | * I/O pipeline definition | |
4868 | * ========================================================================== | |
34dc7c2f | 4869 | */ |
428870ff | 4870 | static zio_pipe_stage_t *zio_pipeline[] = { |
b128c09f | 4871 | NULL, |
b128c09f | 4872 | zio_read_bp_init, |
3dfb57a3 | 4873 | zio_write_bp_init, |
428870ff BB |
4874 | zio_free_bp_init, |
4875 | zio_issue_async, | |
3dfb57a3 | 4876 | zio_write_compress, |
b5256303 | 4877 | zio_encrypt, |
b128c09f | 4878 | zio_checksum_generate, |
03c6040b | 4879 | zio_nop_write, |
428870ff BB |
4880 | zio_ddt_read_start, |
4881 | zio_ddt_read_done, | |
4882 | zio_ddt_write, | |
4883 | zio_ddt_free, | |
b128c09f BB |
4884 | zio_gang_assemble, |
4885 | zio_gang_issue, | |
3dfb57a3 | 4886 | zio_dva_throttle, |
b128c09f BB |
4887 | zio_dva_allocate, |
4888 | zio_dva_free, | |
4889 | zio_dva_claim, | |
4890 | zio_ready, | |
4891 | zio_vdev_io_start, | |
4892 | zio_vdev_io_done, | |
4893 | zio_vdev_io_assess, | |
4894 | zio_checksum_verify, | |
4895 | zio_done | |
4896 | }; | |
c28b2279 | 4897 | |
9ae529ec | 4898 | |
9ae529ec | 4899 | |
9ae529ec | 4900 | |
fcff0f35 PD |
4901 | /* |
4902 | * Compare two zbookmark_phys_t's to see which we would reach first in a | |
4903 | * pre-order traversal of the object tree. | |
4904 | * | |
4905 | * This is simple in every case aside from the meta-dnode object. For all other | |
4906 | * objects, we traverse them in order (object 1 before object 2, and so on). | |
4907 | * However, all of these objects are traversed while traversing object 0, since | |
4908 | * the data it points to is the list of objects. Thus, we need to convert to a | |
4909 | * canonical representation so we can compare meta-dnode bookmarks to | |
4910 | * non-meta-dnode bookmarks. | |
4911 | * | |
4912 | * We do this by calculating "equivalents" for each field of the zbookmark. | |
4913 | * zbookmarks outside of the meta-dnode use their own object and level, and | |
4914 | * calculate the level 0 equivalent (the first L0 blkid that is contained in the | |
4915 | * blocks this bookmark refers to) by multiplying their blkid by their span | |
4916 | * (the number of L0 blocks contained within one block at their level). | |
4917 | * zbookmarks inside the meta-dnode calculate their object equivalent | |
4918 | * (which is L0equiv * dnodes per data block), use 0 for their L0equiv, and use | |
4919 | * level + 1<<31 (any value larger than a level could ever be) for their level. | |
4920 | * This causes them to always compare before a bookmark in their object | |
4921 | * equivalent, compare appropriately to bookmarks in other objects, and to | |
4922 | * compare appropriately to other bookmarks in the meta-dnode. | |
4923 | */ | |
4924 | int | |
4925 | zbookmark_compare(uint16_t dbss1, uint8_t ibs1, uint16_t dbss2, uint8_t ibs2, | |
4926 | const zbookmark_phys_t *zb1, const zbookmark_phys_t *zb2) | |
4927 | { | |
4928 | /* | |
4929 | * These variables represent the "equivalent" values for the zbookmark, | |
4930 | * after converting zbookmarks inside the meta dnode to their | |
4931 | * normal-object equivalents. | |
4932 | */ | |
4933 | uint64_t zb1obj, zb2obj; | |
4934 | uint64_t zb1L0, zb2L0; | |
4935 | uint64_t zb1level, zb2level; | |
4936 | ||
4937 | if (zb1->zb_object == zb2->zb_object && | |
4938 | zb1->zb_level == zb2->zb_level && | |
4939 | zb1->zb_blkid == zb2->zb_blkid) | |
4940 | return (0); | |
9ae529ec | 4941 | |
30af21b0 PD |
4942 | IMPLY(zb1->zb_level > 0, ibs1 >= SPA_MINBLOCKSHIFT); |
4943 | IMPLY(zb2->zb_level > 0, ibs2 >= SPA_MINBLOCKSHIFT); | |
4944 | ||
fcff0f35 PD |
4945 | /* |
4946 | * BP_SPANB calculates the span in blocks. | |
4947 | */ | |
4948 | zb1L0 = (zb1->zb_blkid) * BP_SPANB(ibs1, zb1->zb_level); | |
4949 | zb2L0 = (zb2->zb_blkid) * BP_SPANB(ibs2, zb2->zb_level); | |
9ae529ec CS |
4950 | |
4951 | if (zb1->zb_object == DMU_META_DNODE_OBJECT) { | |
fcff0f35 PD |
4952 | zb1obj = zb1L0 * (dbss1 << (SPA_MINBLOCKSHIFT - DNODE_SHIFT)); |
4953 | zb1L0 = 0; | |
4954 | zb1level = zb1->zb_level + COMPARE_META_LEVEL; | |
4955 | } else { | |
4956 | zb1obj = zb1->zb_object; | |
4957 | zb1level = zb1->zb_level; | |
9ae529ec CS |
4958 | } |
4959 | ||
fcff0f35 PD |
4960 | if (zb2->zb_object == DMU_META_DNODE_OBJECT) { |
4961 | zb2obj = zb2L0 * (dbss2 << (SPA_MINBLOCKSHIFT - DNODE_SHIFT)); | |
4962 | zb2L0 = 0; | |
4963 | zb2level = zb2->zb_level + COMPARE_META_LEVEL; | |
4964 | } else { | |
4965 | zb2obj = zb2->zb_object; | |
4966 | zb2level = zb2->zb_level; | |
4967 | } | |
4968 | ||
4969 | /* Now that we have a canonical representation, do the comparison. */ | |
4970 | if (zb1obj != zb2obj) | |
4971 | return (zb1obj < zb2obj ? -1 : 1); | |
4972 | else if (zb1L0 != zb2L0) | |
4973 | return (zb1L0 < zb2L0 ? -1 : 1); | |
4974 | else if (zb1level != zb2level) | |
4975 | return (zb1level > zb2level ? -1 : 1); | |
4976 | /* | |
4977 | * This can (theoretically) happen if the bookmarks have the same object | |
4978 | * and level, but different blkids, if the block sizes are not the same. | |
4979 | * There is presently no way to change the indirect block sizes | |
4980 | */ | |
4981 | return (0); | |
4982 | } | |
4983 | ||
4984 | /* | |
4985 | * This function checks the following: given that last_block is the place that | |
4986 | * our traversal stopped last time, does that guarantee that we've visited | |
4987 | * every node under subtree_root? Therefore, we can't just use the raw output | |
4988 | * of zbookmark_compare. We have to pass in a modified version of | |
4989 | * subtree_root; by incrementing the block id, and then checking whether | |
4990 | * last_block is before or equal to that, we can tell whether or not having | |
4991 | * visited last_block implies that all of subtree_root's children have been | |
4992 | * visited. | |
4993 | */ | |
4994 | boolean_t | |
4995 | zbookmark_subtree_completed(const dnode_phys_t *dnp, | |
4996 | const zbookmark_phys_t *subtree_root, const zbookmark_phys_t *last_block) | |
4997 | { | |
4998 | zbookmark_phys_t mod_zb = *subtree_root; | |
4999 | mod_zb.zb_blkid++; | |
5000 | ASSERT(last_block->zb_level == 0); | |
5001 | ||
5002 | /* The objset_phys_t isn't before anything. */ | |
5003 | if (dnp == NULL) | |
9ae529ec | 5004 | return (B_FALSE); |
fcff0f35 PD |
5005 | |
5006 | /* | |
5007 | * We pass in 1ULL << (DNODE_BLOCK_SHIFT - SPA_MINBLOCKSHIFT) for the | |
5008 | * data block size in sectors, because that variable is only used if | |
5009 | * the bookmark refers to a block in the meta-dnode. Since we don't | |
5010 | * know without examining it what object it refers to, and there's no | |
5011 | * harm in passing in this value in other cases, we always pass it in. | |
5012 | * | |
5013 | * We pass in 0 for the indirect block size shift because zb2 must be | |
5014 | * level 0. The indirect block size is only used to calculate the span | |
5015 | * of the bookmark, but since the bookmark must be level 0, the span is | |
5016 | * always 1, so the math works out. | |
5017 | * | |
5018 | * If you make changes to how the zbookmark_compare code works, be sure | |
5019 | * to make sure that this code still works afterwards. | |
5020 | */ | |
5021 | return (zbookmark_compare(dnp->dn_datablkszsec, dnp->dn_indblkshift, | |
5022 | 1ULL << (DNODE_BLOCK_SHIFT - SPA_MINBLOCKSHIFT), 0, &mod_zb, | |
5023 | last_block) <= 0); | |
9ae529ec CS |
5024 | } |
5025 | ||
c28b2279 | 5026 | EXPORT_SYMBOL(zio_type_name); |
81971b13 BB |
5027 | EXPORT_SYMBOL(zio_buf_alloc); |
5028 | EXPORT_SYMBOL(zio_data_buf_alloc); | |
5029 | EXPORT_SYMBOL(zio_buf_free); | |
5030 | EXPORT_SYMBOL(zio_data_buf_free); | |
c28b2279 | 5031 | |
03fdcb9a | 5032 | ZFS_MODULE_PARAM(zfs_zio, zio_, slow_io_ms, INT, ZMOD_RW, |
ad796b8a | 5033 | "Max I/O completion time (milliseconds) before marking it as slow"); |
c409e464 | 5034 | |
03fdcb9a MM |
5035 | ZFS_MODULE_PARAM(zfs_zio, zio_, requeue_io_start_cut_in_line, INT, ZMOD_RW, |
5036 | "Prioritize requeued I/O"); | |
29dee3ee | 5037 | |
03fdcb9a | 5038 | ZFS_MODULE_PARAM(zfs, zfs_, sync_pass_deferred_free, INT, ZMOD_RW, |
d1d7e268 | 5039 | "Defer frees starting in this pass"); |
29dee3ee | 5040 | |
03fdcb9a | 5041 | ZFS_MODULE_PARAM(zfs, zfs_, sync_pass_dont_compress, INT, ZMOD_RW, |
d1d7e268 | 5042 | "Don't compress starting in this pass"); |
29dee3ee | 5043 | |
03fdcb9a | 5044 | ZFS_MODULE_PARAM(zfs, zfs_, sync_pass_rewrite, INT, ZMOD_RW, |
d1d7e268 | 5045 | "Rewrite new bps starting in this pass"); |
3dfb57a3 | 5046 | |
03fdcb9a | 5047 | ZFS_MODULE_PARAM(zfs_zio, zio_, dva_throttle_enabled, INT, ZMOD_RW, |
3dfb57a3 | 5048 | "Throttle block allocations in the ZIO pipeline"); |
638dd5f4 | 5049 | |
03fdcb9a | 5050 | ZFS_MODULE_PARAM(zfs_zio, zio_, deadman_log_all, INT, ZMOD_RW, |
638dd5f4 | 5051 | "Log all slow ZIOs, not just those with vdevs"); |