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Commit | Line | Data |
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34dc7c2f BB |
1 | /* |
2 | * CDDL HEADER START | |
3 | * | |
4 | * The contents of this file are subject to the terms of the | |
5 | * Common Development and Distribution License (the "License"). | |
6 | * You may not use this file except in compliance with the License. | |
7 | * | |
8 | * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE | |
9 | * or http://www.opensolaris.org/os/licensing. | |
10 | * See the License for the specific language governing permissions | |
11 | * and limitations under the License. | |
12 | * | |
13 | * When distributing Covered Code, include this CDDL HEADER in each | |
14 | * file and include the License file at usr/src/OPENSOLARIS.LICENSE. | |
15 | * If applicable, add the following below this CDDL HEADER, with the | |
16 | * fields enclosed by brackets "[]" replaced with your own identifying | |
17 | * information: Portions Copyright [yyyy] [name of copyright owner] | |
18 | * | |
19 | * CDDL HEADER END | |
20 | */ | |
21 | /* | |
428870ff | 22 | * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. |
64fc7762 | 23 | * Copyright (c) 2011, 2017 by Delphix. All rights reserved. |
a38718a6 | 24 | * Copyright (c) 2011 Nexenta Systems, Inc. All rights reserved. |
34dc7c2f BB |
25 | */ |
26 | ||
f1512ee6 | 27 | #include <sys/sysmacros.h> |
34dc7c2f BB |
28 | #include <sys/zfs_context.h> |
29 | #include <sys/fm/fs/zfs.h> | |
30 | #include <sys/spa.h> | |
31 | #include <sys/txg.h> | |
32 | #include <sys/spa_impl.h> | |
33 | #include <sys/vdev_impl.h> | |
34 | #include <sys/zio_impl.h> | |
35 | #include <sys/zio_compress.h> | |
36 | #include <sys/zio_checksum.h> | |
428870ff BB |
37 | #include <sys/dmu_objset.h> |
38 | #include <sys/arc.h> | |
39 | #include <sys/ddt.h> | |
9b67f605 | 40 | #include <sys/blkptr.h> |
b0bc7a84 | 41 | #include <sys/zfeature.h> |
d4a72f23 | 42 | #include <sys/dsl_scan.h> |
3dfb57a3 | 43 | #include <sys/metaslab_impl.h> |
193a37cb | 44 | #include <sys/time.h> |
26ef0cc7 | 45 | #include <sys/trace_zio.h> |
a6255b7f | 46 | #include <sys/abd.h> |
b5256303 | 47 | #include <sys/dsl_crypt.h> |
34dc7c2f | 48 | |
34dc7c2f BB |
49 | /* |
50 | * ========================================================================== | |
51 | * I/O type descriptions | |
52 | * ========================================================================== | |
53 | */ | |
e8b96c60 | 54 | const char *zio_type_name[ZIO_TYPES] = { |
3dfb57a3 DB |
55 | /* |
56 | * Note: Linux kernel thread name length is limited | |
57 | * so these names will differ from upstream open zfs. | |
58 | */ | |
451041db | 59 | "z_null", "z_rd", "z_wr", "z_fr", "z_cl", "z_ioctl" |
428870ff | 60 | }; |
34dc7c2f | 61 | |
27f2b90d | 62 | int zio_dva_throttle_enabled = B_TRUE; |
3dfb57a3 | 63 | |
34dc7c2f BB |
64 | /* |
65 | * ========================================================================== | |
66 | * I/O kmem caches | |
67 | * ========================================================================== | |
68 | */ | |
69 | kmem_cache_t *zio_cache; | |
d164b209 | 70 | kmem_cache_t *zio_link_cache; |
34dc7c2f BB |
71 | kmem_cache_t *zio_buf_cache[SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT]; |
72 | kmem_cache_t *zio_data_buf_cache[SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT]; | |
a6255b7f DQ |
73 | #if defined(ZFS_DEBUG) && !defined(_KERNEL) |
74 | uint64_t zio_buf_cache_allocs[SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT]; | |
75 | uint64_t zio_buf_cache_frees[SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT]; | |
76 | #endif | |
77 | ||
a69052be | 78 | int zio_delay_max = ZIO_DELAY_MAX; |
34dc7c2f | 79 | |
98b25418 GW |
80 | #define ZIO_PIPELINE_CONTINUE 0x100 |
81 | #define ZIO_PIPELINE_STOP 0x101 | |
82 | ||
fcff0f35 PD |
83 | #define BP_SPANB(indblkshift, level) \ |
84 | (((uint64_t)1) << ((level) * ((indblkshift) - SPA_BLKPTRSHIFT))) | |
85 | #define COMPARE_META_LEVEL 0x80000000ul | |
55d85d5a GW |
86 | /* |
87 | * The following actions directly effect the spa's sync-to-convergence logic. | |
88 | * The values below define the sync pass when we start performing the action. | |
89 | * Care should be taken when changing these values as they directly impact | |
90 | * spa_sync() performance. Tuning these values may introduce subtle performance | |
91 | * pathologies and should only be done in the context of performance analysis. | |
92 | * These tunables will eventually be removed and replaced with #defines once | |
93 | * enough analysis has been done to determine optimal values. | |
94 | * | |
95 | * The 'zfs_sync_pass_deferred_free' pass must be greater than 1 to ensure that | |
96 | * regular blocks are not deferred. | |
97 | */ | |
98 | int zfs_sync_pass_deferred_free = 2; /* defer frees starting in this pass */ | |
99 | int zfs_sync_pass_dont_compress = 5; /* don't compress starting in this pass */ | |
100 | int zfs_sync_pass_rewrite = 2; /* rewrite new bps starting in this pass */ | |
101 | ||
34dc7c2f | 102 | /* |
b128c09f BB |
103 | * An allocating zio is one that either currently has the DVA allocate |
104 | * stage set or will have it later in its lifetime. | |
34dc7c2f | 105 | */ |
428870ff BB |
106 | #define IO_IS_ALLOCATING(zio) ((zio)->io_orig_pipeline & ZIO_STAGE_DVA_ALLOCATE) |
107 | ||
c409e464 | 108 | int zio_requeue_io_start_cut_in_line = 1; |
428870ff BB |
109 | |
110 | #ifdef ZFS_DEBUG | |
111 | int zio_buf_debug_limit = 16384; | |
112 | #else | |
113 | int zio_buf_debug_limit = 0; | |
114 | #endif | |
34dc7c2f | 115 | |
da6b4005 NB |
116 | static inline void __zio_execute(zio_t *zio); |
117 | ||
3dfb57a3 DB |
118 | static void zio_taskq_dispatch(zio_t *, zio_taskq_type_t, boolean_t); |
119 | ||
34dc7c2f BB |
120 | void |
121 | zio_init(void) | |
122 | { | |
123 | size_t c; | |
124 | vmem_t *data_alloc_arena = NULL; | |
125 | ||
3941503c BB |
126 | zio_cache = kmem_cache_create("zio_cache", |
127 | sizeof (zio_t), 0, NULL, NULL, NULL, NULL, NULL, 0); | |
d164b209 | 128 | zio_link_cache = kmem_cache_create("zio_link_cache", |
6795a698 | 129 | sizeof (zio_link_t), 0, NULL, NULL, NULL, NULL, NULL, 0); |
34dc7c2f BB |
130 | |
131 | /* | |
132 | * For small buffers, we want a cache for each multiple of | |
f1512ee6 MA |
133 | * SPA_MINBLOCKSIZE. For larger buffers, we want a cache |
134 | * for each quarter-power of 2. | |
34dc7c2f BB |
135 | */ |
136 | for (c = 0; c < SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT; c++) { | |
137 | size_t size = (c + 1) << SPA_MINBLOCKSHIFT; | |
138 | size_t p2 = size; | |
139 | size_t align = 0; | |
6442f3cf | 140 | size_t cflags = (size > zio_buf_debug_limit) ? KMC_NODEBUG : 0; |
34dc7c2f | 141 | |
34328f3c | 142 | #if defined(_ILP32) && defined(_KERNEL) |
f1512ee6 MA |
143 | /* |
144 | * Cache size limited to 1M on 32-bit platforms until ARC | |
145 | * buffers no longer require virtual address space. | |
146 | */ | |
147 | if (size > zfs_max_recordsize) | |
148 | break; | |
149 | #endif | |
150 | ||
151 | while (!ISP2(p2)) | |
34dc7c2f BB |
152 | p2 &= p2 - 1; |
153 | ||
498877ba MA |
154 | #ifndef _KERNEL |
155 | /* | |
156 | * If we are using watchpoints, put each buffer on its own page, | |
157 | * to eliminate the performance overhead of trapping to the | |
158 | * kernel when modifying a non-watched buffer that shares the | |
159 | * page with a watched buffer. | |
160 | */ | |
161 | if (arc_watch && !IS_P2ALIGNED(size, PAGESIZE)) | |
162 | continue; | |
fcf64f45 BB |
163 | /* |
164 | * Here's the problem - on 4K native devices in userland on | |
165 | * Linux using O_DIRECT, buffers must be 4K aligned or I/O | |
166 | * will fail with EINVAL, causing zdb (and others) to coredump. | |
167 | * Since userland probably doesn't need optimized buffer caches, | |
168 | * we just force 4K alignment on everything. | |
169 | */ | |
170 | align = 8 * SPA_MINBLOCKSIZE; | |
171 | #else | |
24fa2034 | 172 | if (size < PAGESIZE) { |
34dc7c2f | 173 | align = SPA_MINBLOCKSIZE; |
498877ba | 174 | } else if (IS_P2ALIGNED(size, p2 >> 2)) { |
24fa2034 | 175 | align = PAGESIZE; |
34dc7c2f | 176 | } |
fcf64f45 | 177 | #endif |
34dc7c2f BB |
178 | |
179 | if (align != 0) { | |
180 | char name[36]; | |
181 | (void) sprintf(name, "zio_buf_%lu", (ulong_t)size); | |
182 | zio_buf_cache[c] = kmem_cache_create(name, size, | |
6442f3cf | 183 | align, NULL, NULL, NULL, NULL, NULL, cflags); |
34dc7c2f BB |
184 | |
185 | (void) sprintf(name, "zio_data_buf_%lu", (ulong_t)size); | |
186 | zio_data_buf_cache[c] = kmem_cache_create(name, size, | |
ae6ba3db | 187 | align, NULL, NULL, NULL, NULL, |
6442f3cf | 188 | data_alloc_arena, cflags); |
34dc7c2f BB |
189 | } |
190 | } | |
191 | ||
192 | while (--c != 0) { | |
193 | ASSERT(zio_buf_cache[c] != NULL); | |
194 | if (zio_buf_cache[c - 1] == NULL) | |
195 | zio_buf_cache[c - 1] = zio_buf_cache[c]; | |
196 | ||
197 | ASSERT(zio_data_buf_cache[c] != NULL); | |
198 | if (zio_data_buf_cache[c - 1] == NULL) | |
199 | zio_data_buf_cache[c - 1] = zio_data_buf_cache[c]; | |
200 | } | |
201 | ||
34dc7c2f | 202 | zio_inject_init(); |
9759c60f ED |
203 | |
204 | lz4_init(); | |
34dc7c2f BB |
205 | } |
206 | ||
207 | void | |
208 | zio_fini(void) | |
209 | { | |
210 | size_t c; | |
211 | kmem_cache_t *last_cache = NULL; | |
212 | kmem_cache_t *last_data_cache = NULL; | |
213 | ||
214 | for (c = 0; c < SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT; c++) { | |
f1512ee6 MA |
215 | #ifdef _ILP32 |
216 | /* | |
217 | * Cache size limited to 1M on 32-bit platforms until ARC | |
218 | * buffers no longer require virtual address space. | |
219 | */ | |
220 | if (((c + 1) << SPA_MINBLOCKSHIFT) > zfs_max_recordsize) | |
221 | break; | |
a6255b7f DQ |
222 | #endif |
223 | #if defined(ZFS_DEBUG) && !defined(_KERNEL) | |
224 | if (zio_buf_cache_allocs[c] != zio_buf_cache_frees[c]) | |
225 | (void) printf("zio_fini: [%d] %llu != %llu\n", | |
226 | (int)((c + 1) << SPA_MINBLOCKSHIFT), | |
227 | (long long unsigned)zio_buf_cache_allocs[c], | |
228 | (long long unsigned)zio_buf_cache_frees[c]); | |
f1512ee6 | 229 | #endif |
34dc7c2f BB |
230 | if (zio_buf_cache[c] != last_cache) { |
231 | last_cache = zio_buf_cache[c]; | |
232 | kmem_cache_destroy(zio_buf_cache[c]); | |
233 | } | |
234 | zio_buf_cache[c] = NULL; | |
235 | ||
236 | if (zio_data_buf_cache[c] != last_data_cache) { | |
237 | last_data_cache = zio_data_buf_cache[c]; | |
238 | kmem_cache_destroy(zio_data_buf_cache[c]); | |
239 | } | |
240 | zio_data_buf_cache[c] = NULL; | |
241 | } | |
242 | ||
d164b209 | 243 | kmem_cache_destroy(zio_link_cache); |
34dc7c2f BB |
244 | kmem_cache_destroy(zio_cache); |
245 | ||
246 | zio_inject_fini(); | |
9759c60f ED |
247 | |
248 | lz4_fini(); | |
34dc7c2f BB |
249 | } |
250 | ||
251 | /* | |
252 | * ========================================================================== | |
253 | * Allocate and free I/O buffers | |
254 | * ========================================================================== | |
255 | */ | |
256 | ||
257 | /* | |
258 | * Use zio_buf_alloc to allocate ZFS metadata. This data will appear in a | |
259 | * crashdump if the kernel panics, so use it judiciously. Obviously, it's | |
260 | * useful to inspect ZFS metadata, but if possible, we should avoid keeping | |
261 | * excess / transient data in-core during a crashdump. | |
262 | */ | |
263 | void * | |
264 | zio_buf_alloc(size_t size) | |
265 | { | |
266 | size_t c = (size - 1) >> SPA_MINBLOCKSHIFT; | |
267 | ||
63e3a861 | 268 | VERIFY3U(c, <, SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT); |
a6255b7f DQ |
269 | #if defined(ZFS_DEBUG) && !defined(_KERNEL) |
270 | atomic_add_64(&zio_buf_cache_allocs[c], 1); | |
271 | #endif | |
34dc7c2f | 272 | |
efcd79a8 | 273 | return (kmem_cache_alloc(zio_buf_cache[c], KM_PUSHPAGE)); |
34dc7c2f BB |
274 | } |
275 | ||
276 | /* | |
277 | * Use zio_data_buf_alloc to allocate data. The data will not appear in a | |
278 | * crashdump if the kernel panics. This exists so that we will limit the amount | |
279 | * of ZFS data that shows up in a kernel crashdump. (Thus reducing the amount | |
280 | * of kernel heap dumped to disk when the kernel panics) | |
281 | */ | |
282 | void * | |
283 | zio_data_buf_alloc(size_t size) | |
284 | { | |
285 | size_t c = (size - 1) >> SPA_MINBLOCKSHIFT; | |
286 | ||
63e3a861 | 287 | VERIFY3U(c, <, SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT); |
34dc7c2f | 288 | |
efcd79a8 | 289 | return (kmem_cache_alloc(zio_data_buf_cache[c], KM_PUSHPAGE)); |
34dc7c2f BB |
290 | } |
291 | ||
292 | void | |
293 | zio_buf_free(void *buf, size_t size) | |
294 | { | |
295 | size_t c = (size - 1) >> SPA_MINBLOCKSHIFT; | |
296 | ||
63e3a861 | 297 | VERIFY3U(c, <, SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT); |
a6255b7f DQ |
298 | #if defined(ZFS_DEBUG) && !defined(_KERNEL) |
299 | atomic_add_64(&zio_buf_cache_frees[c], 1); | |
300 | #endif | |
34dc7c2f BB |
301 | |
302 | kmem_cache_free(zio_buf_cache[c], buf); | |
303 | } | |
304 | ||
305 | void | |
306 | zio_data_buf_free(void *buf, size_t size) | |
307 | { | |
308 | size_t c = (size - 1) >> SPA_MINBLOCKSHIFT; | |
309 | ||
63e3a861 | 310 | VERIFY3U(c, <, SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT); |
34dc7c2f BB |
311 | |
312 | kmem_cache_free(zio_data_buf_cache[c], buf); | |
313 | } | |
314 | ||
84c07ada GN |
315 | static void |
316 | zio_abd_free(void *abd, size_t size) | |
317 | { | |
318 | abd_free((abd_t *)abd); | |
319 | } | |
320 | ||
34dc7c2f BB |
321 | /* |
322 | * ========================================================================== | |
323 | * Push and pop I/O transform buffers | |
324 | * ========================================================================== | |
325 | */ | |
d3c2ae1c | 326 | void |
a6255b7f | 327 | zio_push_transform(zio_t *zio, abd_t *data, uint64_t size, uint64_t bufsize, |
e9aa730c | 328 | zio_transform_func_t *transform) |
34dc7c2f | 329 | { |
79c76d5b | 330 | zio_transform_t *zt = kmem_alloc(sizeof (zio_transform_t), KM_SLEEP); |
34dc7c2f | 331 | |
a6255b7f DQ |
332 | /* |
333 | * Ensure that anyone expecting this zio to contain a linear ABD isn't | |
334 | * going to get a nasty surprise when they try to access the data. | |
335 | */ | |
336 | IMPLY(abd_is_linear(zio->io_abd), abd_is_linear(data)); | |
337 | ||
338 | zt->zt_orig_abd = zio->io_abd; | |
b128c09f | 339 | zt->zt_orig_size = zio->io_size; |
34dc7c2f | 340 | zt->zt_bufsize = bufsize; |
b128c09f | 341 | zt->zt_transform = transform; |
34dc7c2f BB |
342 | |
343 | zt->zt_next = zio->io_transform_stack; | |
344 | zio->io_transform_stack = zt; | |
345 | ||
a6255b7f | 346 | zio->io_abd = data; |
34dc7c2f BB |
347 | zio->io_size = size; |
348 | } | |
349 | ||
d3c2ae1c | 350 | void |
b128c09f | 351 | zio_pop_transforms(zio_t *zio) |
34dc7c2f | 352 | { |
b128c09f BB |
353 | zio_transform_t *zt; |
354 | ||
355 | while ((zt = zio->io_transform_stack) != NULL) { | |
356 | if (zt->zt_transform != NULL) | |
357 | zt->zt_transform(zio, | |
a6255b7f | 358 | zt->zt_orig_abd, zt->zt_orig_size); |
34dc7c2f | 359 | |
428870ff | 360 | if (zt->zt_bufsize != 0) |
a6255b7f | 361 | abd_free(zio->io_abd); |
34dc7c2f | 362 | |
a6255b7f | 363 | zio->io_abd = zt->zt_orig_abd; |
b128c09f BB |
364 | zio->io_size = zt->zt_orig_size; |
365 | zio->io_transform_stack = zt->zt_next; | |
34dc7c2f | 366 | |
b128c09f | 367 | kmem_free(zt, sizeof (zio_transform_t)); |
34dc7c2f BB |
368 | } |
369 | } | |
370 | ||
b128c09f BB |
371 | /* |
372 | * ========================================================================== | |
b5256303 | 373 | * I/O transform callbacks for subblocks, decompression, and decryption |
b128c09f BB |
374 | * ========================================================================== |
375 | */ | |
376 | static void | |
a6255b7f | 377 | zio_subblock(zio_t *zio, abd_t *data, uint64_t size) |
b128c09f BB |
378 | { |
379 | ASSERT(zio->io_size > size); | |
380 | ||
381 | if (zio->io_type == ZIO_TYPE_READ) | |
a6255b7f | 382 | abd_copy(data, zio->io_abd, size); |
b128c09f BB |
383 | } |
384 | ||
385 | static void | |
a6255b7f | 386 | zio_decompress(zio_t *zio, abd_t *data, uint64_t size) |
b128c09f | 387 | { |
a6255b7f DQ |
388 | if (zio->io_error == 0) { |
389 | void *tmp = abd_borrow_buf(data, size); | |
390 | int ret = zio_decompress_data(BP_GET_COMPRESS(zio->io_bp), | |
391 | zio->io_abd, tmp, zio->io_size, size); | |
392 | abd_return_buf_copy(data, tmp, size); | |
393 | ||
394 | if (ret != 0) | |
395 | zio->io_error = SET_ERROR(EIO); | |
396 | } | |
b128c09f BB |
397 | } |
398 | ||
b5256303 TC |
399 | static void |
400 | zio_decrypt(zio_t *zio, abd_t *data, uint64_t size) | |
401 | { | |
402 | int ret; | |
403 | void *tmp; | |
404 | blkptr_t *bp = zio->io_bp; | |
ae76f45c TC |
405 | spa_t *spa = zio->io_spa; |
406 | uint64_t dsobj = zio->io_bookmark.zb_objset; | |
b5256303 TC |
407 | uint64_t lsize = BP_GET_LSIZE(bp); |
408 | dmu_object_type_t ot = BP_GET_TYPE(bp); | |
409 | uint8_t salt[ZIO_DATA_SALT_LEN]; | |
410 | uint8_t iv[ZIO_DATA_IV_LEN]; | |
411 | uint8_t mac[ZIO_DATA_MAC_LEN]; | |
412 | boolean_t no_crypt = B_FALSE; | |
413 | ||
414 | ASSERT(BP_USES_CRYPT(bp)); | |
415 | ASSERT3U(size, !=, 0); | |
416 | ||
417 | if (zio->io_error != 0) | |
418 | return; | |
419 | ||
420 | /* | |
421 | * Verify the cksum of MACs stored in an indirect bp. It will always | |
422 | * be possible to verify this since it does not require an encryption | |
423 | * key. | |
424 | */ | |
425 | if (BP_HAS_INDIRECT_MAC_CKSUM(bp)) { | |
426 | zio_crypt_decode_mac_bp(bp, mac); | |
427 | ||
428 | if (BP_GET_COMPRESS(bp) != ZIO_COMPRESS_OFF) { | |
429 | /* | |
430 | * We haven't decompressed the data yet, but | |
431 | * zio_crypt_do_indirect_mac_checksum() requires | |
432 | * decompressed data to be able to parse out the MACs | |
433 | * from the indirect block. We decompress it now and | |
434 | * throw away the result after we are finished. | |
435 | */ | |
436 | tmp = zio_buf_alloc(lsize); | |
437 | ret = zio_decompress_data(BP_GET_COMPRESS(bp), | |
438 | zio->io_abd, tmp, zio->io_size, lsize); | |
439 | if (ret != 0) { | |
440 | ret = SET_ERROR(EIO); | |
441 | goto error; | |
442 | } | |
443 | ret = zio_crypt_do_indirect_mac_checksum(B_FALSE, | |
444 | tmp, lsize, BP_SHOULD_BYTESWAP(bp), mac); | |
445 | zio_buf_free(tmp, lsize); | |
446 | } else { | |
447 | ret = zio_crypt_do_indirect_mac_checksum_abd(B_FALSE, | |
448 | zio->io_abd, size, BP_SHOULD_BYTESWAP(bp), mac); | |
449 | } | |
450 | abd_copy(data, zio->io_abd, size); | |
451 | ||
be9a5c35 TC |
452 | if (zio_injection_enabled && ot != DMU_OT_DNODE && ret == 0) { |
453 | ret = zio_handle_decrypt_injection(spa, | |
454 | &zio->io_bookmark, ot, ECKSUM); | |
455 | } | |
b5256303 TC |
456 | if (ret != 0) |
457 | goto error; | |
458 | ||
459 | return; | |
460 | } | |
461 | ||
462 | /* | |
463 | * If this is an authenticated block, just check the MAC. It would be | |
464 | * nice to separate this out into its own flag, but for the moment | |
465 | * enum zio_flag is out of bits. | |
466 | */ | |
467 | if (BP_IS_AUTHENTICATED(bp)) { | |
468 | if (ot == DMU_OT_OBJSET) { | |
ae76f45c TC |
469 | ret = spa_do_crypt_objset_mac_abd(B_FALSE, spa, |
470 | dsobj, zio->io_abd, size, BP_SHOULD_BYTESWAP(bp)); | |
b5256303 TC |
471 | } else { |
472 | zio_crypt_decode_mac_bp(bp, mac); | |
ae76f45c TC |
473 | ret = spa_do_crypt_mac_abd(B_FALSE, spa, dsobj, |
474 | zio->io_abd, size, mac); | |
be9a5c35 TC |
475 | if (zio_injection_enabled && ret == 0) { |
476 | ret = zio_handle_decrypt_injection(spa, | |
477 | &zio->io_bookmark, ot, ECKSUM); | |
478 | } | |
b5256303 TC |
479 | } |
480 | abd_copy(data, zio->io_abd, size); | |
481 | ||
482 | if (ret != 0) | |
483 | goto error; | |
484 | ||
485 | return; | |
486 | } | |
487 | ||
488 | zio_crypt_decode_params_bp(bp, salt, iv); | |
489 | ||
490 | if (ot == DMU_OT_INTENT_LOG) { | |
491 | tmp = abd_borrow_buf_copy(zio->io_abd, sizeof (zil_chain_t)); | |
492 | zio_crypt_decode_mac_zil(tmp, mac); | |
493 | abd_return_buf(zio->io_abd, tmp, sizeof (zil_chain_t)); | |
494 | } else { | |
495 | zio_crypt_decode_mac_bp(bp, mac); | |
496 | } | |
497 | ||
be9a5c35 TC |
498 | ret = spa_do_crypt_abd(B_FALSE, spa, &zio->io_bookmark, BP_GET_TYPE(bp), |
499 | BP_GET_DEDUP(bp), BP_SHOULD_BYTESWAP(bp), salt, iv, mac, size, data, | |
500 | zio->io_abd, &no_crypt); | |
b5256303 TC |
501 | if (no_crypt) |
502 | abd_copy(data, zio->io_abd, size); | |
503 | ||
504 | if (ret != 0) | |
505 | goto error; | |
506 | ||
507 | return; | |
508 | ||
509 | error: | |
510 | /* assert that the key was found unless this was speculative */ | |
be9a5c35 | 511 | ASSERT(ret != EACCES || (zio->io_flags & ZIO_FLAG_SPECULATIVE)); |
b5256303 TC |
512 | |
513 | /* | |
514 | * If there was a decryption / authentication error return EIO as | |
515 | * the io_error. If this was not a speculative zio, create an ereport. | |
516 | */ | |
517 | if (ret == ECKSUM) { | |
a2c2ed1b | 518 | zio->io_error = SET_ERROR(EIO); |
b5256303 | 519 | if ((zio->io_flags & ZIO_FLAG_SPECULATIVE) == 0) { |
be9a5c35 | 520 | spa_log_error(spa, &zio->io_bookmark); |
b5256303 | 521 | zfs_ereport_post(FM_EREPORT_ZFS_AUTHENTICATION, |
ae76f45c | 522 | spa, NULL, &zio->io_bookmark, zio, 0, 0); |
b5256303 TC |
523 | } |
524 | } else { | |
525 | zio->io_error = ret; | |
526 | } | |
527 | } | |
528 | ||
b128c09f BB |
529 | /* |
530 | * ========================================================================== | |
531 | * I/O parent/child relationships and pipeline interlocks | |
532 | * ========================================================================== | |
533 | */ | |
d164b209 | 534 | zio_t * |
3dfb57a3 | 535 | zio_walk_parents(zio_t *cio, zio_link_t **zl) |
d164b209 | 536 | { |
d164b209 | 537 | list_t *pl = &cio->io_parent_list; |
b128c09f | 538 | |
3dfb57a3 DB |
539 | *zl = (*zl == NULL) ? list_head(pl) : list_next(pl, *zl); |
540 | if (*zl == NULL) | |
d164b209 BB |
541 | return (NULL); |
542 | ||
3dfb57a3 DB |
543 | ASSERT((*zl)->zl_child == cio); |
544 | return ((*zl)->zl_parent); | |
d164b209 BB |
545 | } |
546 | ||
547 | zio_t * | |
3dfb57a3 | 548 | zio_walk_children(zio_t *pio, zio_link_t **zl) |
d164b209 | 549 | { |
d164b209 BB |
550 | list_t *cl = &pio->io_child_list; |
551 | ||
a8b2e306 TC |
552 | ASSERT(MUTEX_HELD(&pio->io_lock)); |
553 | ||
3dfb57a3 DB |
554 | *zl = (*zl == NULL) ? list_head(cl) : list_next(cl, *zl); |
555 | if (*zl == NULL) | |
d164b209 BB |
556 | return (NULL); |
557 | ||
3dfb57a3 DB |
558 | ASSERT((*zl)->zl_parent == pio); |
559 | return ((*zl)->zl_child); | |
d164b209 BB |
560 | } |
561 | ||
562 | zio_t * | |
563 | zio_unique_parent(zio_t *cio) | |
564 | { | |
3dfb57a3 DB |
565 | zio_link_t *zl = NULL; |
566 | zio_t *pio = zio_walk_parents(cio, &zl); | |
d164b209 | 567 | |
3dfb57a3 | 568 | VERIFY3P(zio_walk_parents(cio, &zl), ==, NULL); |
d164b209 BB |
569 | return (pio); |
570 | } | |
571 | ||
572 | void | |
573 | zio_add_child(zio_t *pio, zio_t *cio) | |
b128c09f | 574 | { |
79c76d5b | 575 | zio_link_t *zl = kmem_cache_alloc(zio_link_cache, KM_SLEEP); |
d164b209 BB |
576 | |
577 | /* | |
578 | * Logical I/Os can have logical, gang, or vdev children. | |
579 | * Gang I/Os can have gang or vdev children. | |
580 | * Vdev I/Os can only have vdev children. | |
581 | * The following ASSERT captures all of these constraints. | |
582 | */ | |
1ce23dca | 583 | ASSERT3S(cio->io_child_type, <=, pio->io_child_type); |
d164b209 BB |
584 | |
585 | zl->zl_parent = pio; | |
586 | zl->zl_child = cio; | |
587 | ||
b128c09f | 588 | mutex_enter(&pio->io_lock); |
a8b2e306 | 589 | mutex_enter(&cio->io_lock); |
d164b209 BB |
590 | |
591 | ASSERT(pio->io_state[ZIO_WAIT_DONE] == 0); | |
592 | ||
1c27024e | 593 | for (int w = 0; w < ZIO_WAIT_TYPES; w++) |
d164b209 BB |
594 | pio->io_children[cio->io_child_type][w] += !cio->io_state[w]; |
595 | ||
596 | list_insert_head(&pio->io_child_list, zl); | |
597 | list_insert_head(&cio->io_parent_list, zl); | |
598 | ||
428870ff BB |
599 | pio->io_child_count++; |
600 | cio->io_parent_count++; | |
601 | ||
d164b209 | 602 | mutex_exit(&cio->io_lock); |
a8b2e306 | 603 | mutex_exit(&pio->io_lock); |
b128c09f BB |
604 | } |
605 | ||
34dc7c2f | 606 | static void |
d164b209 | 607 | zio_remove_child(zio_t *pio, zio_t *cio, zio_link_t *zl) |
b128c09f | 608 | { |
d164b209 BB |
609 | ASSERT(zl->zl_parent == pio); |
610 | ASSERT(zl->zl_child == cio); | |
b128c09f BB |
611 | |
612 | mutex_enter(&pio->io_lock); | |
a8b2e306 | 613 | mutex_enter(&cio->io_lock); |
d164b209 BB |
614 | |
615 | list_remove(&pio->io_child_list, zl); | |
616 | list_remove(&cio->io_parent_list, zl); | |
617 | ||
428870ff BB |
618 | pio->io_child_count--; |
619 | cio->io_parent_count--; | |
620 | ||
d164b209 | 621 | mutex_exit(&cio->io_lock); |
a8b2e306 | 622 | mutex_exit(&pio->io_lock); |
d164b209 | 623 | kmem_cache_free(zio_link_cache, zl); |
b128c09f BB |
624 | } |
625 | ||
626 | static boolean_t | |
ddc751d5 | 627 | zio_wait_for_children(zio_t *zio, uint8_t childbits, enum zio_wait_type wait) |
34dc7c2f | 628 | { |
b128c09f BB |
629 | boolean_t waiting = B_FALSE; |
630 | ||
631 | mutex_enter(&zio->io_lock); | |
632 | ASSERT(zio->io_stall == NULL); | |
ddc751d5 GW |
633 | for (int c = 0; c < ZIO_CHILD_TYPES; c++) { |
634 | if (!(ZIO_CHILD_BIT_IS_SET(childbits, c))) | |
635 | continue; | |
636 | ||
637 | uint64_t *countp = &zio->io_children[c][wait]; | |
638 | if (*countp != 0) { | |
639 | zio->io_stage >>= 1; | |
640 | ASSERT3U(zio->io_stage, !=, ZIO_STAGE_OPEN); | |
641 | zio->io_stall = countp; | |
642 | waiting = B_TRUE; | |
643 | break; | |
644 | } | |
b128c09f BB |
645 | } |
646 | mutex_exit(&zio->io_lock); | |
b128c09f BB |
647 | return (waiting); |
648 | } | |
34dc7c2f | 649 | |
bf701a83 BB |
650 | __attribute__((always_inline)) |
651 | static inline void | |
b128c09f BB |
652 | zio_notify_parent(zio_t *pio, zio_t *zio, enum zio_wait_type wait) |
653 | { | |
654 | uint64_t *countp = &pio->io_children[zio->io_child_type][wait]; | |
655 | int *errorp = &pio->io_child_error[zio->io_child_type]; | |
34dc7c2f | 656 | |
b128c09f BB |
657 | mutex_enter(&pio->io_lock); |
658 | if (zio->io_error && !(zio->io_flags & ZIO_FLAG_DONT_PROPAGATE)) | |
659 | *errorp = zio_worst_error(*errorp, zio->io_error); | |
660 | pio->io_reexecute |= zio->io_reexecute; | |
661 | ASSERT3U(*countp, >, 0); | |
e8b96c60 MA |
662 | |
663 | (*countp)--; | |
664 | ||
665 | if (*countp == 0 && pio->io_stall == countp) { | |
3dfb57a3 DB |
666 | zio_taskq_type_t type = |
667 | pio->io_stage < ZIO_STAGE_VDEV_IO_START ? ZIO_TASKQ_ISSUE : | |
668 | ZIO_TASKQ_INTERRUPT; | |
b128c09f BB |
669 | pio->io_stall = NULL; |
670 | mutex_exit(&pio->io_lock); | |
3dfb57a3 DB |
671 | /* |
672 | * Dispatch the parent zio in its own taskq so that | |
673 | * the child can continue to make progress. This also | |
674 | * prevents overflowing the stack when we have deeply nested | |
675 | * parent-child relationships. | |
676 | */ | |
677 | zio_taskq_dispatch(pio, type, B_FALSE); | |
b128c09f BB |
678 | } else { |
679 | mutex_exit(&pio->io_lock); | |
34dc7c2f BB |
680 | } |
681 | } | |
682 | ||
b128c09f BB |
683 | static void |
684 | zio_inherit_child_errors(zio_t *zio, enum zio_child c) | |
685 | { | |
686 | if (zio->io_child_error[c] != 0 && zio->io_error == 0) | |
687 | zio->io_error = zio->io_child_error[c]; | |
688 | } | |
689 | ||
3dfb57a3 | 690 | int |
64fc7762 | 691 | zio_bookmark_compare(const void *x1, const void *x2) |
3dfb57a3 DB |
692 | { |
693 | const zio_t *z1 = x1; | |
694 | const zio_t *z2 = x2; | |
3dfb57a3 | 695 | |
64fc7762 MA |
696 | if (z1->io_bookmark.zb_objset < z2->io_bookmark.zb_objset) |
697 | return (-1); | |
698 | if (z1->io_bookmark.zb_objset > z2->io_bookmark.zb_objset) | |
699 | return (1); | |
3dfb57a3 | 700 | |
64fc7762 MA |
701 | if (z1->io_bookmark.zb_object < z2->io_bookmark.zb_object) |
702 | return (-1); | |
703 | if (z1->io_bookmark.zb_object > z2->io_bookmark.zb_object) | |
704 | return (1); | |
3dfb57a3 | 705 | |
64fc7762 MA |
706 | if (z1->io_bookmark.zb_level < z2->io_bookmark.zb_level) |
707 | return (-1); | |
708 | if (z1->io_bookmark.zb_level > z2->io_bookmark.zb_level) | |
709 | return (1); | |
710 | ||
711 | if (z1->io_bookmark.zb_blkid < z2->io_bookmark.zb_blkid) | |
712 | return (-1); | |
713 | if (z1->io_bookmark.zb_blkid > z2->io_bookmark.zb_blkid) | |
714 | return (1); | |
715 | ||
716 | if (z1 < z2) | |
717 | return (-1); | |
718 | if (z1 > z2) | |
719 | return (1); | |
720 | ||
721 | return (0); | |
3dfb57a3 DB |
722 | } |
723 | ||
34dc7c2f BB |
724 | /* |
725 | * ========================================================================== | |
b128c09f | 726 | * Create the various types of I/O (read, write, free, etc) |
34dc7c2f BB |
727 | * ========================================================================== |
728 | */ | |
729 | static zio_t * | |
428870ff | 730 | zio_create(zio_t *pio, spa_t *spa, uint64_t txg, const blkptr_t *bp, |
a6255b7f | 731 | abd_t *data, uint64_t lsize, uint64_t psize, zio_done_func_t *done, |
2aa34383 DK |
732 | void *private, zio_type_t type, zio_priority_t priority, |
733 | enum zio_flag flags, vdev_t *vd, uint64_t offset, | |
734 | const zbookmark_phys_t *zb, enum zio_stage stage, | |
735 | enum zio_stage pipeline) | |
34dc7c2f BB |
736 | { |
737 | zio_t *zio; | |
738 | ||
2aa34383 DK |
739 | ASSERT3U(psize, <=, SPA_MAXBLOCKSIZE); |
740 | ASSERT(P2PHASE(psize, SPA_MINBLOCKSIZE) == 0); | |
b128c09f BB |
741 | ASSERT(P2PHASE(offset, SPA_MINBLOCKSIZE) == 0); |
742 | ||
743 | ASSERT(!vd || spa_config_held(spa, SCL_STATE_ALL, RW_READER)); | |
744 | ASSERT(!bp || !(flags & ZIO_FLAG_CONFIG_WRITER)); | |
745 | ASSERT(vd || stage == ZIO_STAGE_OPEN); | |
34dc7c2f | 746 | |
b5256303 | 747 | IMPLY(lsize != psize, (flags & ZIO_FLAG_RAW_COMPRESS) != 0); |
2aa34383 | 748 | |
79c76d5b | 749 | zio = kmem_cache_alloc(zio_cache, KM_SLEEP); |
3941503c BB |
750 | bzero(zio, sizeof (zio_t)); |
751 | ||
448d7aaa | 752 | mutex_init(&zio->io_lock, NULL, MUTEX_NOLOCKDEP, NULL); |
3941503c BB |
753 | cv_init(&zio->io_cv, NULL, CV_DEFAULT, NULL); |
754 | ||
755 | list_create(&zio->io_parent_list, sizeof (zio_link_t), | |
756 | offsetof(zio_link_t, zl_parent_node)); | |
757 | list_create(&zio->io_child_list, sizeof (zio_link_t), | |
758 | offsetof(zio_link_t, zl_child_node)); | |
4e21fd06 | 759 | metaslab_trace_init(&zio->io_alloc_list); |
d164b209 | 760 | |
b128c09f BB |
761 | if (vd != NULL) |
762 | zio->io_child_type = ZIO_CHILD_VDEV; | |
763 | else if (flags & ZIO_FLAG_GANG_CHILD) | |
764 | zio->io_child_type = ZIO_CHILD_GANG; | |
428870ff BB |
765 | else if (flags & ZIO_FLAG_DDT_CHILD) |
766 | zio->io_child_type = ZIO_CHILD_DDT; | |
b128c09f BB |
767 | else |
768 | zio->io_child_type = ZIO_CHILD_LOGICAL; | |
769 | ||
34dc7c2f | 770 | if (bp != NULL) { |
428870ff | 771 | zio->io_bp = (blkptr_t *)bp; |
34dc7c2f BB |
772 | zio->io_bp_copy = *bp; |
773 | zio->io_bp_orig = *bp; | |
428870ff BB |
774 | if (type != ZIO_TYPE_WRITE || |
775 | zio->io_child_type == ZIO_CHILD_DDT) | |
b128c09f | 776 | zio->io_bp = &zio->io_bp_copy; /* so caller can free */ |
9babb374 | 777 | if (zio->io_child_type == ZIO_CHILD_LOGICAL) |
b128c09f | 778 | zio->io_logical = zio; |
9babb374 BB |
779 | if (zio->io_child_type > ZIO_CHILD_GANG && BP_IS_GANG(bp)) |
780 | pipeline |= ZIO_GANG_STAGES; | |
34dc7c2f | 781 | } |
b128c09f BB |
782 | |
783 | zio->io_spa = spa; | |
784 | zio->io_txg = txg; | |
34dc7c2f BB |
785 | zio->io_done = done; |
786 | zio->io_private = private; | |
787 | zio->io_type = type; | |
788 | zio->io_priority = priority; | |
b128c09f BB |
789 | zio->io_vd = vd; |
790 | zio->io_offset = offset; | |
a6255b7f | 791 | zio->io_orig_abd = zio->io_abd = data; |
2aa34383 DK |
792 | zio->io_orig_size = zio->io_size = psize; |
793 | zio->io_lsize = lsize; | |
b128c09f BB |
794 | zio->io_orig_flags = zio->io_flags = flags; |
795 | zio->io_orig_stage = zio->io_stage = stage; | |
796 | zio->io_orig_pipeline = zio->io_pipeline = pipeline; | |
3dfb57a3 | 797 | zio->io_pipeline_trace = ZIO_STAGE_OPEN; |
34dc7c2f | 798 | |
d164b209 BB |
799 | zio->io_state[ZIO_WAIT_READY] = (stage >= ZIO_STAGE_READY); |
800 | zio->io_state[ZIO_WAIT_DONE] = (stage >= ZIO_STAGE_DONE); | |
801 | ||
b128c09f BB |
802 | if (zb != NULL) |
803 | zio->io_bookmark = *zb; | |
804 | ||
805 | if (pio != NULL) { | |
b128c09f | 806 | if (zio->io_logical == NULL) |
34dc7c2f | 807 | zio->io_logical = pio->io_logical; |
9babb374 BB |
808 | if (zio->io_child_type == ZIO_CHILD_GANG) |
809 | zio->io_gang_leader = pio->io_gang_leader; | |
b128c09f | 810 | zio_add_child(pio, zio); |
34dc7c2f BB |
811 | } |
812 | ||
a38718a6 GA |
813 | taskq_init_ent(&zio->io_tqent); |
814 | ||
34dc7c2f BB |
815 | return (zio); |
816 | } | |
817 | ||
818 | static void | |
b128c09f | 819 | zio_destroy(zio_t *zio) |
34dc7c2f | 820 | { |
4e21fd06 | 821 | metaslab_trace_fini(&zio->io_alloc_list); |
3941503c BB |
822 | list_destroy(&zio->io_parent_list); |
823 | list_destroy(&zio->io_child_list); | |
824 | mutex_destroy(&zio->io_lock); | |
825 | cv_destroy(&zio->io_cv); | |
b128c09f | 826 | kmem_cache_free(zio_cache, zio); |
34dc7c2f BB |
827 | } |
828 | ||
829 | zio_t * | |
d164b209 | 830 | zio_null(zio_t *pio, spa_t *spa, vdev_t *vd, zio_done_func_t *done, |
428870ff | 831 | void *private, enum zio_flag flags) |
34dc7c2f BB |
832 | { |
833 | zio_t *zio; | |
834 | ||
2aa34383 | 835 | zio = zio_create(pio, spa, 0, NULL, NULL, 0, 0, done, private, |
d164b209 | 836 | ZIO_TYPE_NULL, ZIO_PRIORITY_NOW, flags, vd, 0, NULL, |
b128c09f | 837 | ZIO_STAGE_OPEN, ZIO_INTERLOCK_PIPELINE); |
34dc7c2f BB |
838 | |
839 | return (zio); | |
840 | } | |
841 | ||
842 | zio_t * | |
428870ff | 843 | zio_root(spa_t *spa, zio_done_func_t *done, void *private, enum zio_flag flags) |
34dc7c2f | 844 | { |
d164b209 | 845 | return (zio_null(NULL, spa, NULL, done, private, flags)); |
34dc7c2f BB |
846 | } |
847 | ||
63e3a861 MA |
848 | void |
849 | zfs_blkptr_verify(spa_t *spa, const blkptr_t *bp) | |
850 | { | |
63e3a861 MA |
851 | if (!DMU_OT_IS_VALID(BP_GET_TYPE(bp))) { |
852 | zfs_panic_recover("blkptr at %p has invalid TYPE %llu", | |
853 | bp, (longlong_t)BP_GET_TYPE(bp)); | |
854 | } | |
855 | if (BP_GET_CHECKSUM(bp) >= ZIO_CHECKSUM_FUNCTIONS || | |
856 | BP_GET_CHECKSUM(bp) <= ZIO_CHECKSUM_ON) { | |
857 | zfs_panic_recover("blkptr at %p has invalid CHECKSUM %llu", | |
858 | bp, (longlong_t)BP_GET_CHECKSUM(bp)); | |
859 | } | |
860 | if (BP_GET_COMPRESS(bp) >= ZIO_COMPRESS_FUNCTIONS || | |
861 | BP_GET_COMPRESS(bp) <= ZIO_COMPRESS_ON) { | |
862 | zfs_panic_recover("blkptr at %p has invalid COMPRESS %llu", | |
863 | bp, (longlong_t)BP_GET_COMPRESS(bp)); | |
864 | } | |
865 | if (BP_GET_LSIZE(bp) > SPA_MAXBLOCKSIZE) { | |
866 | zfs_panic_recover("blkptr at %p has invalid LSIZE %llu", | |
867 | bp, (longlong_t)BP_GET_LSIZE(bp)); | |
868 | } | |
869 | if (BP_GET_PSIZE(bp) > SPA_MAXBLOCKSIZE) { | |
870 | zfs_panic_recover("blkptr at %p has invalid PSIZE %llu", | |
871 | bp, (longlong_t)BP_GET_PSIZE(bp)); | |
872 | } | |
873 | ||
874 | if (BP_IS_EMBEDDED(bp)) { | |
875 | if (BPE_GET_ETYPE(bp) > NUM_BP_EMBEDDED_TYPES) { | |
876 | zfs_panic_recover("blkptr at %p has invalid ETYPE %llu", | |
877 | bp, (longlong_t)BPE_GET_ETYPE(bp)); | |
878 | } | |
879 | } | |
880 | ||
6cb8e530 PZ |
881 | /* |
882 | * Do not verify individual DVAs if the config is not trusted. This | |
883 | * will be done once the zio is executed in vdev_mirror_map_alloc. | |
884 | */ | |
885 | if (!spa->spa_trust_config) | |
886 | return; | |
887 | ||
63e3a861 MA |
888 | /* |
889 | * Pool-specific checks. | |
890 | * | |
891 | * Note: it would be nice to verify that the blk_birth and | |
892 | * BP_PHYSICAL_BIRTH() are not too large. However, spa_freeze() | |
893 | * allows the birth time of log blocks (and dmu_sync()-ed blocks | |
894 | * that are in the log) to be arbitrarily large. | |
895 | */ | |
1c27024e | 896 | for (int i = 0; i < BP_GET_NDVAS(bp); i++) { |
63e3a861 | 897 | uint64_t vdevid = DVA_GET_VDEV(&bp->blk_dva[i]); |
1c27024e | 898 | |
63e3a861 MA |
899 | if (vdevid >= spa->spa_root_vdev->vdev_children) { |
900 | zfs_panic_recover("blkptr at %p DVA %u has invalid " | |
901 | "VDEV %llu", | |
902 | bp, i, (longlong_t)vdevid); | |
ee3a23b8 | 903 | continue; |
63e3a861 | 904 | } |
1c27024e | 905 | vdev_t *vd = spa->spa_root_vdev->vdev_child[vdevid]; |
63e3a861 MA |
906 | if (vd == NULL) { |
907 | zfs_panic_recover("blkptr at %p DVA %u has invalid " | |
908 | "VDEV %llu", | |
909 | bp, i, (longlong_t)vdevid); | |
ee3a23b8 | 910 | continue; |
63e3a861 MA |
911 | } |
912 | if (vd->vdev_ops == &vdev_hole_ops) { | |
913 | zfs_panic_recover("blkptr at %p DVA %u has hole " | |
914 | "VDEV %llu", | |
915 | bp, i, (longlong_t)vdevid); | |
ee3a23b8 | 916 | continue; |
63e3a861 MA |
917 | } |
918 | if (vd->vdev_ops == &vdev_missing_ops) { | |
919 | /* | |
920 | * "missing" vdevs are valid during import, but we | |
921 | * don't have their detailed info (e.g. asize), so | |
922 | * we can't perform any more checks on them. | |
923 | */ | |
924 | continue; | |
925 | } | |
1c27024e DB |
926 | uint64_t offset = DVA_GET_OFFSET(&bp->blk_dva[i]); |
927 | uint64_t asize = DVA_GET_ASIZE(&bp->blk_dva[i]); | |
63e3a861 MA |
928 | if (BP_IS_GANG(bp)) |
929 | asize = vdev_psize_to_asize(vd, SPA_GANGBLOCKSIZE); | |
930 | if (offset + asize > vd->vdev_asize) { | |
931 | zfs_panic_recover("blkptr at %p DVA %u has invalid " | |
932 | "OFFSET %llu", | |
933 | bp, i, (longlong_t)offset); | |
934 | } | |
935 | } | |
936 | } | |
937 | ||
6cb8e530 PZ |
938 | boolean_t |
939 | zfs_dva_valid(spa_t *spa, const dva_t *dva, const blkptr_t *bp) | |
940 | { | |
941 | uint64_t vdevid = DVA_GET_VDEV(dva); | |
942 | ||
943 | if (vdevid >= spa->spa_root_vdev->vdev_children) | |
944 | return (B_FALSE); | |
945 | ||
946 | vdev_t *vd = spa->spa_root_vdev->vdev_child[vdevid]; | |
947 | if (vd == NULL) | |
948 | return (B_FALSE); | |
949 | ||
950 | if (vd->vdev_ops == &vdev_hole_ops) | |
951 | return (B_FALSE); | |
952 | ||
953 | if (vd->vdev_ops == &vdev_missing_ops) { | |
954 | return (B_FALSE); | |
955 | } | |
956 | ||
957 | uint64_t offset = DVA_GET_OFFSET(dva); | |
958 | uint64_t asize = DVA_GET_ASIZE(dva); | |
959 | ||
960 | if (BP_IS_GANG(bp)) | |
961 | asize = vdev_psize_to_asize(vd, SPA_GANGBLOCKSIZE); | |
962 | if (offset + asize > vd->vdev_asize) | |
963 | return (B_FALSE); | |
964 | ||
965 | return (B_TRUE); | |
966 | } | |
967 | ||
34dc7c2f | 968 | zio_t * |
b128c09f | 969 | zio_read(zio_t *pio, spa_t *spa, const blkptr_t *bp, |
a6255b7f | 970 | abd_t *data, uint64_t size, zio_done_func_t *done, void *private, |
5dbd68a3 | 971 | zio_priority_t priority, enum zio_flag flags, const zbookmark_phys_t *zb) |
34dc7c2f BB |
972 | { |
973 | zio_t *zio; | |
974 | ||
63e3a861 MA |
975 | zfs_blkptr_verify(spa, bp); |
976 | ||
428870ff | 977 | zio = zio_create(pio, spa, BP_PHYSICAL_BIRTH(bp), bp, |
2aa34383 | 978 | data, size, size, done, private, |
b128c09f | 979 | ZIO_TYPE_READ, priority, flags, NULL, 0, zb, |
428870ff BB |
980 | ZIO_STAGE_OPEN, (flags & ZIO_FLAG_DDT_CHILD) ? |
981 | ZIO_DDT_CHILD_READ_PIPELINE : ZIO_READ_PIPELINE); | |
34dc7c2f | 982 | |
b128c09f BB |
983 | return (zio); |
984 | } | |
34dc7c2f | 985 | |
34dc7c2f | 986 | zio_t * |
b128c09f | 987 | zio_write(zio_t *pio, spa_t *spa, uint64_t txg, blkptr_t *bp, |
a6255b7f | 988 | abd_t *data, uint64_t lsize, uint64_t psize, const zio_prop_t *zp, |
bc77ba73 PD |
989 | zio_done_func_t *ready, zio_done_func_t *children_ready, |
990 | zio_done_func_t *physdone, zio_done_func_t *done, | |
991 | void *private, zio_priority_t priority, enum zio_flag flags, | |
992 | const zbookmark_phys_t *zb) | |
34dc7c2f BB |
993 | { |
994 | zio_t *zio; | |
995 | ||
b128c09f BB |
996 | ASSERT(zp->zp_checksum >= ZIO_CHECKSUM_OFF && |
997 | zp->zp_checksum < ZIO_CHECKSUM_FUNCTIONS && | |
998 | zp->zp_compress >= ZIO_COMPRESS_OFF && | |
999 | zp->zp_compress < ZIO_COMPRESS_FUNCTIONS && | |
9ae529ec | 1000 | DMU_OT_IS_VALID(zp->zp_type) && |
b128c09f | 1001 | zp->zp_level < 32 && |
428870ff | 1002 | zp->zp_copies > 0 && |
03c6040b | 1003 | zp->zp_copies <= spa_max_replication(spa)); |
34dc7c2f | 1004 | |
2aa34383 | 1005 | zio = zio_create(pio, spa, txg, bp, data, lsize, psize, done, private, |
b128c09f | 1006 | ZIO_TYPE_WRITE, priority, flags, NULL, 0, zb, |
428870ff BB |
1007 | ZIO_STAGE_OPEN, (flags & ZIO_FLAG_DDT_CHILD) ? |
1008 | ZIO_DDT_CHILD_WRITE_PIPELINE : ZIO_WRITE_PIPELINE); | |
34dc7c2f BB |
1009 | |
1010 | zio->io_ready = ready; | |
bc77ba73 | 1011 | zio->io_children_ready = children_ready; |
e8b96c60 | 1012 | zio->io_physdone = physdone; |
b128c09f | 1013 | zio->io_prop = *zp; |
34dc7c2f | 1014 | |
9b67f605 MA |
1015 | /* |
1016 | * Data can be NULL if we are going to call zio_write_override() to | |
1017 | * provide the already-allocated BP. But we may need the data to | |
1018 | * verify a dedup hit (if requested). In this case, don't try to | |
b5256303 TC |
1019 | * dedup (just take the already-allocated BP verbatim). Encrypted |
1020 | * dedup blocks need data as well so we also disable dedup in this | |
1021 | * case. | |
9b67f605 | 1022 | */ |
b5256303 TC |
1023 | if (data == NULL && |
1024 | (zio->io_prop.zp_dedup_verify || zio->io_prop.zp_encrypt)) { | |
9b67f605 MA |
1025 | zio->io_prop.zp_dedup = zio->io_prop.zp_dedup_verify = B_FALSE; |
1026 | } | |
1027 | ||
34dc7c2f BB |
1028 | return (zio); |
1029 | } | |
1030 | ||
1031 | zio_t * | |
a6255b7f | 1032 | zio_rewrite(zio_t *pio, spa_t *spa, uint64_t txg, blkptr_t *bp, abd_t *data, |
e8b96c60 | 1033 | uint64_t size, zio_done_func_t *done, void *private, |
5dbd68a3 | 1034 | zio_priority_t priority, enum zio_flag flags, zbookmark_phys_t *zb) |
34dc7c2f BB |
1035 | { |
1036 | zio_t *zio; | |
1037 | ||
2aa34383 | 1038 | zio = zio_create(pio, spa, txg, bp, data, size, size, done, private, |
3dfb57a3 | 1039 | ZIO_TYPE_WRITE, priority, flags | ZIO_FLAG_IO_REWRITE, NULL, 0, zb, |
b128c09f | 1040 | ZIO_STAGE_OPEN, ZIO_REWRITE_PIPELINE); |
34dc7c2f BB |
1041 | |
1042 | return (zio); | |
1043 | } | |
1044 | ||
428870ff | 1045 | void |
03c6040b | 1046 | zio_write_override(zio_t *zio, blkptr_t *bp, int copies, boolean_t nopwrite) |
428870ff BB |
1047 | { |
1048 | ASSERT(zio->io_type == ZIO_TYPE_WRITE); | |
1049 | ASSERT(zio->io_child_type == ZIO_CHILD_LOGICAL); | |
1050 | ASSERT(zio->io_stage == ZIO_STAGE_OPEN); | |
1051 | ASSERT(zio->io_txg == spa_syncing_txg(zio->io_spa)); | |
1052 | ||
03c6040b GW |
1053 | /* |
1054 | * We must reset the io_prop to match the values that existed | |
1055 | * when the bp was first written by dmu_sync() keeping in mind | |
1056 | * that nopwrite and dedup are mutually exclusive. | |
1057 | */ | |
1058 | zio->io_prop.zp_dedup = nopwrite ? B_FALSE : zio->io_prop.zp_dedup; | |
1059 | zio->io_prop.zp_nopwrite = nopwrite; | |
428870ff BB |
1060 | zio->io_prop.zp_copies = copies; |
1061 | zio->io_bp_override = bp; | |
1062 | } | |
1063 | ||
1064 | void | |
1065 | zio_free(spa_t *spa, uint64_t txg, const blkptr_t *bp) | |
1066 | { | |
9b67f605 | 1067 | |
a1d477c2 MA |
1068 | zfs_blkptr_verify(spa, bp); |
1069 | ||
9b67f605 MA |
1070 | /* |
1071 | * The check for EMBEDDED is a performance optimization. We | |
1072 | * process the free here (by ignoring it) rather than | |
1073 | * putting it on the list and then processing it in zio_free_sync(). | |
1074 | */ | |
1075 | if (BP_IS_EMBEDDED(bp)) | |
1076 | return; | |
13fe0198 | 1077 | metaslab_check_free(spa, bp); |
2883cad5 MA |
1078 | |
1079 | /* | |
1080 | * Frees that are for the currently-syncing txg, are not going to be | |
1081 | * deferred, and which will not need to do a read (i.e. not GANG or | |
1082 | * DEDUP), can be processed immediately. Otherwise, put them on the | |
1083 | * in-memory list for later processing. | |
1084 | */ | |
1085 | if (BP_IS_GANG(bp) || BP_GET_DEDUP(bp) || | |
1086 | txg != spa->spa_syncing_txg || | |
1087 | spa_sync_pass(spa) >= zfs_sync_pass_deferred_free) { | |
1088 | bplist_append(&spa->spa_free_bplist[txg & TXG_MASK], bp); | |
1089 | } else { | |
1090 | VERIFY0(zio_wait(zio_free_sync(NULL, spa, txg, bp, 0))); | |
1091 | } | |
428870ff BB |
1092 | } |
1093 | ||
34dc7c2f | 1094 | zio_t * |
428870ff BB |
1095 | zio_free_sync(zio_t *pio, spa_t *spa, uint64_t txg, const blkptr_t *bp, |
1096 | enum zio_flag flags) | |
34dc7c2f BB |
1097 | { |
1098 | zio_t *zio; | |
2883cad5 | 1099 | enum zio_stage stage = ZIO_FREE_PIPELINE; |
34dc7c2f | 1100 | |
428870ff BB |
1101 | ASSERT(!BP_IS_HOLE(bp)); |
1102 | ASSERT(spa_syncing_txg(spa) == txg); | |
55d85d5a | 1103 | ASSERT(spa_sync_pass(spa) < zfs_sync_pass_deferred_free); |
34dc7c2f | 1104 | |
9b67f605 MA |
1105 | if (BP_IS_EMBEDDED(bp)) |
1106 | return (zio_null(pio, spa, NULL, NULL, NULL, 0)); | |
1107 | ||
13fe0198 | 1108 | metaslab_check_free(spa, bp); |
8c841793 | 1109 | arc_freed(spa, bp); |
d4a72f23 | 1110 | dsl_scan_freed(spa, bp); |
13fe0198 | 1111 | |
2883cad5 MA |
1112 | /* |
1113 | * GANG and DEDUP blocks can induce a read (for the gang block header, | |
1114 | * or the DDT), so issue them asynchronously so that this thread is | |
1115 | * not tied up. | |
1116 | */ | |
1117 | if (BP_IS_GANG(bp) || BP_GET_DEDUP(bp)) | |
1118 | stage |= ZIO_STAGE_ISSUE_ASYNC; | |
1119 | ||
b128c09f | 1120 | zio = zio_create(pio, spa, txg, bp, NULL, BP_GET_PSIZE(bp), |
2aa34383 DK |
1121 | BP_GET_PSIZE(bp), NULL, NULL, ZIO_TYPE_FREE, ZIO_PRIORITY_NOW, |
1122 | flags, NULL, 0, NULL, ZIO_STAGE_OPEN, stage); | |
2883cad5 | 1123 | |
34dc7c2f BB |
1124 | return (zio); |
1125 | } | |
1126 | ||
1127 | zio_t * | |
428870ff BB |
1128 | zio_claim(zio_t *pio, spa_t *spa, uint64_t txg, const blkptr_t *bp, |
1129 | zio_done_func_t *done, void *private, enum zio_flag flags) | |
34dc7c2f BB |
1130 | { |
1131 | zio_t *zio; | |
1132 | ||
a1d477c2 | 1133 | zfs_blkptr_verify(spa, bp); |
9b67f605 MA |
1134 | |
1135 | if (BP_IS_EMBEDDED(bp)) | |
1136 | return (zio_null(pio, spa, NULL, NULL, NULL, 0)); | |
1137 | ||
34dc7c2f BB |
1138 | /* |
1139 | * A claim is an allocation of a specific block. Claims are needed | |
1140 | * to support immediate writes in the intent log. The issue is that | |
1141 | * immediate writes contain committed data, but in a txg that was | |
1142 | * *not* committed. Upon opening the pool after an unclean shutdown, | |
1143 | * the intent log claims all blocks that contain immediate write data | |
1144 | * so that the SPA knows they're in use. | |
1145 | * | |
1146 | * All claims *must* be resolved in the first txg -- before the SPA | |
1147 | * starts allocating blocks -- so that nothing is allocated twice. | |
428870ff | 1148 | * If txg == 0 we just verify that the block is claimable. |
34dc7c2f BB |
1149 | */ |
1150 | ASSERT3U(spa->spa_uberblock.ub_rootbp.blk_birth, <, spa_first_txg(spa)); | |
428870ff BB |
1151 | ASSERT(txg == spa_first_txg(spa) || txg == 0); |
1152 | ASSERT(!BP_GET_DEDUP(bp) || !spa_writeable(spa)); /* zdb(1M) */ | |
34dc7c2f | 1153 | |
b128c09f | 1154 | zio = zio_create(pio, spa, txg, bp, NULL, BP_GET_PSIZE(bp), |
2aa34383 DK |
1155 | BP_GET_PSIZE(bp), done, private, ZIO_TYPE_CLAIM, ZIO_PRIORITY_NOW, |
1156 | flags, NULL, 0, NULL, ZIO_STAGE_OPEN, ZIO_CLAIM_PIPELINE); | |
3dfb57a3 | 1157 | ASSERT0(zio->io_queued_timestamp); |
34dc7c2f BB |
1158 | |
1159 | return (zio); | |
1160 | } | |
1161 | ||
1162 | zio_t * | |
1163 | zio_ioctl(zio_t *pio, spa_t *spa, vdev_t *vd, int cmd, | |
e8b96c60 | 1164 | zio_done_func_t *done, void *private, enum zio_flag flags) |
34dc7c2f BB |
1165 | { |
1166 | zio_t *zio; | |
1167 | int c; | |
1168 | ||
1169 | if (vd->vdev_children == 0) { | |
2aa34383 | 1170 | zio = zio_create(pio, spa, 0, NULL, NULL, 0, 0, done, private, |
e8b96c60 | 1171 | ZIO_TYPE_IOCTL, ZIO_PRIORITY_NOW, flags, vd, 0, NULL, |
34dc7c2f BB |
1172 | ZIO_STAGE_OPEN, ZIO_IOCTL_PIPELINE); |
1173 | ||
34dc7c2f BB |
1174 | zio->io_cmd = cmd; |
1175 | } else { | |
d164b209 | 1176 | zio = zio_null(pio, spa, NULL, NULL, NULL, flags); |
34dc7c2f BB |
1177 | |
1178 | for (c = 0; c < vd->vdev_children; c++) | |
1179 | zio_nowait(zio_ioctl(zio, spa, vd->vdev_child[c], cmd, | |
e8b96c60 | 1180 | done, private, flags)); |
34dc7c2f BB |
1181 | } |
1182 | ||
1183 | return (zio); | |
1184 | } | |
1185 | ||
34dc7c2f BB |
1186 | zio_t * |
1187 | zio_read_phys(zio_t *pio, vdev_t *vd, uint64_t offset, uint64_t size, | |
a6255b7f | 1188 | abd_t *data, int checksum, zio_done_func_t *done, void *private, |
e8b96c60 | 1189 | zio_priority_t priority, enum zio_flag flags, boolean_t labels) |
34dc7c2f BB |
1190 | { |
1191 | zio_t *zio; | |
34dc7c2f | 1192 | |
b128c09f BB |
1193 | ASSERT(vd->vdev_children == 0); |
1194 | ASSERT(!labels || offset + size <= VDEV_LABEL_START_SIZE || | |
1195 | offset >= vd->vdev_psize - VDEV_LABEL_END_SIZE); | |
1196 | ASSERT3U(offset + size, <=, vd->vdev_psize); | |
34dc7c2f | 1197 | |
2aa34383 DK |
1198 | zio = zio_create(pio, vd->vdev_spa, 0, NULL, data, size, size, done, |
1199 | private, ZIO_TYPE_READ, priority, flags | ZIO_FLAG_PHYSICAL, vd, | |
1200 | offset, NULL, ZIO_STAGE_OPEN, ZIO_READ_PHYS_PIPELINE); | |
34dc7c2f | 1201 | |
b128c09f | 1202 | zio->io_prop.zp_checksum = checksum; |
34dc7c2f BB |
1203 | |
1204 | return (zio); | |
1205 | } | |
1206 | ||
1207 | zio_t * | |
1208 | zio_write_phys(zio_t *pio, vdev_t *vd, uint64_t offset, uint64_t size, | |
a6255b7f | 1209 | abd_t *data, int checksum, zio_done_func_t *done, void *private, |
e8b96c60 | 1210 | zio_priority_t priority, enum zio_flag flags, boolean_t labels) |
34dc7c2f | 1211 | { |
34dc7c2f | 1212 | zio_t *zio; |
34dc7c2f | 1213 | |
b128c09f BB |
1214 | ASSERT(vd->vdev_children == 0); |
1215 | ASSERT(!labels || offset + size <= VDEV_LABEL_START_SIZE || | |
1216 | offset >= vd->vdev_psize - VDEV_LABEL_END_SIZE); | |
1217 | ASSERT3U(offset + size, <=, vd->vdev_psize); | |
34dc7c2f | 1218 | |
2aa34383 DK |
1219 | zio = zio_create(pio, vd->vdev_spa, 0, NULL, data, size, size, done, |
1220 | private, ZIO_TYPE_WRITE, priority, flags | ZIO_FLAG_PHYSICAL, vd, | |
1221 | offset, NULL, ZIO_STAGE_OPEN, ZIO_WRITE_PHYS_PIPELINE); | |
34dc7c2f | 1222 | |
b128c09f | 1223 | zio->io_prop.zp_checksum = checksum; |
34dc7c2f | 1224 | |
3c67d83a | 1225 | if (zio_checksum_table[checksum].ci_flags & ZCHECKSUM_FLAG_EMBEDDED) { |
34dc7c2f | 1226 | /* |
428870ff | 1227 | * zec checksums are necessarily destructive -- they modify |
b128c09f | 1228 | * the end of the write buffer to hold the verifier/checksum. |
34dc7c2f | 1229 | * Therefore, we must make a local copy in case the data is |
b128c09f | 1230 | * being written to multiple places in parallel. |
34dc7c2f | 1231 | */ |
a6255b7f DQ |
1232 | abd_t *wbuf = abd_alloc_sametype(data, size); |
1233 | abd_copy(wbuf, data, size); | |
1234 | ||
b128c09f | 1235 | zio_push_transform(zio, wbuf, size, size, NULL); |
34dc7c2f BB |
1236 | } |
1237 | ||
1238 | return (zio); | |
1239 | } | |
1240 | ||
1241 | /* | |
b128c09f | 1242 | * Create a child I/O to do some work for us. |
34dc7c2f BB |
1243 | */ |
1244 | zio_t * | |
b128c09f | 1245 | zio_vdev_child_io(zio_t *pio, blkptr_t *bp, vdev_t *vd, uint64_t offset, |
4ea3f864 GM |
1246 | abd_t *data, uint64_t size, int type, zio_priority_t priority, |
1247 | enum zio_flag flags, zio_done_func_t *done, void *private) | |
34dc7c2f | 1248 | { |
428870ff | 1249 | enum zio_stage pipeline = ZIO_VDEV_CHILD_PIPELINE; |
b128c09f BB |
1250 | zio_t *zio; |
1251 | ||
a1d477c2 MA |
1252 | /* |
1253 | * vdev child I/Os do not propagate their error to the parent. | |
1254 | * Therefore, for correct operation the caller *must* check for | |
1255 | * and handle the error in the child i/o's done callback. | |
1256 | * The only exceptions are i/os that we don't care about | |
1257 | * (OPTIONAL or REPAIR). | |
1258 | */ | |
1259 | ASSERT((flags & ZIO_FLAG_OPTIONAL) || (flags & ZIO_FLAG_IO_REPAIR) || | |
1260 | done != NULL); | |
1261 | ||
34dc7c2f BB |
1262 | if (type == ZIO_TYPE_READ && bp != NULL) { |
1263 | /* | |
1264 | * If we have the bp, then the child should perform the | |
1265 | * checksum and the parent need not. This pushes error | |
1266 | * detection as close to the leaves as possible and | |
1267 | * eliminates redundant checksums in the interior nodes. | |
1268 | */ | |
428870ff BB |
1269 | pipeline |= ZIO_STAGE_CHECKSUM_VERIFY; |
1270 | pio->io_pipeline &= ~ZIO_STAGE_CHECKSUM_VERIFY; | |
34dc7c2f BB |
1271 | } |
1272 | ||
a1d477c2 MA |
1273 | if (vd->vdev_ops->vdev_op_leaf) { |
1274 | ASSERT0(vd->vdev_children); | |
b128c09f | 1275 | offset += VDEV_LABEL_START_SIZE; |
a1d477c2 | 1276 | } |
b128c09f | 1277 | |
a1d477c2 | 1278 | flags |= ZIO_VDEV_CHILD_FLAGS(pio); |
428870ff BB |
1279 | |
1280 | /* | |
1281 | * If we've decided to do a repair, the write is not speculative -- | |
1282 | * even if the original read was. | |
1283 | */ | |
1284 | if (flags & ZIO_FLAG_IO_REPAIR) | |
1285 | flags &= ~ZIO_FLAG_SPECULATIVE; | |
1286 | ||
3dfb57a3 DB |
1287 | /* |
1288 | * If we're creating a child I/O that is not associated with a | |
1289 | * top-level vdev, then the child zio is not an allocating I/O. | |
1290 | * If this is a retried I/O then we ignore it since we will | |
1291 | * have already processed the original allocating I/O. | |
1292 | */ | |
1293 | if (flags & ZIO_FLAG_IO_ALLOCATING && | |
1294 | (vd != vd->vdev_top || (flags & ZIO_FLAG_IO_RETRY))) { | |
6d00b5e1 | 1295 | ASSERTV(metaslab_class_t *mc = spa_normal_class(pio->io_spa)); |
3dfb57a3 DB |
1296 | |
1297 | ASSERT(mc->mc_alloc_throttle_enabled); | |
1298 | ASSERT(type == ZIO_TYPE_WRITE); | |
1299 | ASSERT(priority == ZIO_PRIORITY_ASYNC_WRITE); | |
1300 | ASSERT(!(flags & ZIO_FLAG_IO_REPAIR)); | |
1301 | ASSERT(!(pio->io_flags & ZIO_FLAG_IO_REWRITE) || | |
1302 | pio->io_child_type == ZIO_CHILD_GANG); | |
1303 | ||
1304 | flags &= ~ZIO_FLAG_IO_ALLOCATING; | |
1305 | } | |
1306 | ||
1307 | ||
2aa34383 | 1308 | zio = zio_create(pio, pio->io_spa, pio->io_txg, bp, data, size, size, |
428870ff BB |
1309 | done, private, type, priority, flags, vd, offset, &pio->io_bookmark, |
1310 | ZIO_STAGE_VDEV_IO_START >> 1, pipeline); | |
3dfb57a3 | 1311 | ASSERT3U(zio->io_child_type, ==, ZIO_CHILD_VDEV); |
34dc7c2f | 1312 | |
e8b96c60 MA |
1313 | zio->io_physdone = pio->io_physdone; |
1314 | if (vd->vdev_ops->vdev_op_leaf && zio->io_logical != NULL) | |
1315 | zio->io_logical->io_phys_children++; | |
1316 | ||
b128c09f | 1317 | return (zio); |
34dc7c2f BB |
1318 | } |
1319 | ||
b128c09f | 1320 | zio_t * |
a6255b7f | 1321 | zio_vdev_delegated_io(vdev_t *vd, uint64_t offset, abd_t *data, uint64_t size, |
9e052db4 | 1322 | zio_type_t type, zio_priority_t priority, enum zio_flag flags, |
e9aa730c | 1323 | zio_done_func_t *done, void *private) |
34dc7c2f | 1324 | { |
b128c09f | 1325 | zio_t *zio; |
34dc7c2f | 1326 | |
b128c09f | 1327 | ASSERT(vd->vdev_ops->vdev_op_leaf); |
34dc7c2f | 1328 | |
b128c09f | 1329 | zio = zio_create(NULL, vd->vdev_spa, 0, NULL, |
2aa34383 | 1330 | data, size, size, done, private, type, priority, |
e8b96c60 | 1331 | flags | ZIO_FLAG_CANFAIL | ZIO_FLAG_DONT_RETRY | ZIO_FLAG_DELEGATED, |
b128c09f | 1332 | vd, offset, NULL, |
428870ff | 1333 | ZIO_STAGE_VDEV_IO_START >> 1, ZIO_VDEV_CHILD_PIPELINE); |
34dc7c2f | 1334 | |
b128c09f | 1335 | return (zio); |
34dc7c2f BB |
1336 | } |
1337 | ||
1338 | void | |
b128c09f | 1339 | zio_flush(zio_t *zio, vdev_t *vd) |
34dc7c2f | 1340 | { |
b128c09f | 1341 | zio_nowait(zio_ioctl(zio, zio->io_spa, vd, DKIOCFLUSHWRITECACHE, |
e8b96c60 | 1342 | NULL, NULL, |
b128c09f | 1343 | ZIO_FLAG_CANFAIL | ZIO_FLAG_DONT_PROPAGATE | ZIO_FLAG_DONT_RETRY)); |
34dc7c2f BB |
1344 | } |
1345 | ||
428870ff BB |
1346 | void |
1347 | zio_shrink(zio_t *zio, uint64_t size) | |
1348 | { | |
1ce23dca PS |
1349 | ASSERT3P(zio->io_executor, ==, NULL); |
1350 | ASSERT3U(zio->io_orig_size, ==, zio->io_size); | |
1351 | ASSERT3U(size, <=, zio->io_size); | |
428870ff BB |
1352 | |
1353 | /* | |
1354 | * We don't shrink for raidz because of problems with the | |
1355 | * reconstruction when reading back less than the block size. | |
1356 | * Note, BP_IS_RAIDZ() assumes no compression. | |
1357 | */ | |
1358 | ASSERT(BP_GET_COMPRESS(zio->io_bp) == ZIO_COMPRESS_OFF); | |
2aa34383 DK |
1359 | if (!BP_IS_RAIDZ(zio->io_bp)) { |
1360 | /* we are not doing a raw write */ | |
1361 | ASSERT3U(zio->io_size, ==, zio->io_lsize); | |
1362 | zio->io_orig_size = zio->io_size = zio->io_lsize = size; | |
1363 | } | |
428870ff BB |
1364 | } |
1365 | ||
34dc7c2f BB |
1366 | /* |
1367 | * ========================================================================== | |
b128c09f | 1368 | * Prepare to read and write logical blocks |
34dc7c2f BB |
1369 | * ========================================================================== |
1370 | */ | |
b128c09f | 1371 | |
34dc7c2f | 1372 | static int |
b128c09f | 1373 | zio_read_bp_init(zio_t *zio) |
34dc7c2f | 1374 | { |
b128c09f | 1375 | blkptr_t *bp = zio->io_bp; |
b5256303 TC |
1376 | uint64_t psize = |
1377 | BP_IS_EMBEDDED(bp) ? BPE_GET_PSIZE(bp) : BP_GET_PSIZE(bp); | |
34dc7c2f | 1378 | |
a1d477c2 MA |
1379 | ASSERT3P(zio->io_bp, ==, &zio->io_bp_copy); |
1380 | ||
fb5f0bc8 | 1381 | if (BP_GET_COMPRESS(bp) != ZIO_COMPRESS_OFF && |
9babb374 | 1382 | zio->io_child_type == ZIO_CHILD_LOGICAL && |
b5256303 | 1383 | !(zio->io_flags & ZIO_FLAG_RAW_COMPRESS)) { |
a6255b7f DQ |
1384 | zio_push_transform(zio, abd_alloc_sametype(zio->io_abd, psize), |
1385 | psize, psize, zio_decompress); | |
34dc7c2f | 1386 | } |
34dc7c2f | 1387 | |
b5256303 TC |
1388 | if (((BP_IS_PROTECTED(bp) && !(zio->io_flags & ZIO_FLAG_RAW_ENCRYPT)) || |
1389 | BP_HAS_INDIRECT_MAC_CKSUM(bp)) && | |
1390 | zio->io_child_type == ZIO_CHILD_LOGICAL) { | |
1391 | zio_push_transform(zio, abd_alloc_sametype(zio->io_abd, psize), | |
1392 | psize, psize, zio_decrypt); | |
1393 | } | |
1394 | ||
9b67f605 | 1395 | if (BP_IS_EMBEDDED(bp) && BPE_GET_ETYPE(bp) == BP_EMBEDDED_TYPE_DATA) { |
a6255b7f DQ |
1396 | int psize = BPE_GET_PSIZE(bp); |
1397 | void *data = abd_borrow_buf(zio->io_abd, psize); | |
1398 | ||
9b67f605 | 1399 | zio->io_pipeline = ZIO_INTERLOCK_PIPELINE; |
a6255b7f DQ |
1400 | decode_embedded_bp_compressed(bp, data); |
1401 | abd_return_buf_copy(zio->io_abd, data, psize); | |
9b67f605 MA |
1402 | } else { |
1403 | ASSERT(!BP_IS_EMBEDDED(bp)); | |
a1d477c2 | 1404 | ASSERT3P(zio->io_bp, ==, &zio->io_bp_copy); |
9b67f605 MA |
1405 | } |
1406 | ||
9ae529ec | 1407 | if (!DMU_OT_IS_METADATA(BP_GET_TYPE(bp)) && BP_GET_LEVEL(bp) == 0) |
b128c09f BB |
1408 | zio->io_flags |= ZIO_FLAG_DONT_CACHE; |
1409 | ||
428870ff BB |
1410 | if (BP_GET_TYPE(bp) == DMU_OT_DDT_ZAP) |
1411 | zio->io_flags |= ZIO_FLAG_DONT_CACHE; | |
1412 | ||
1413 | if (BP_GET_DEDUP(bp) && zio->io_child_type == ZIO_CHILD_LOGICAL) | |
1414 | zio->io_pipeline = ZIO_DDT_READ_PIPELINE; | |
1415 | ||
b128c09f | 1416 | return (ZIO_PIPELINE_CONTINUE); |
34dc7c2f BB |
1417 | } |
1418 | ||
b128c09f BB |
1419 | static int |
1420 | zio_write_bp_init(zio_t *zio) | |
34dc7c2f | 1421 | { |
b128c09f BB |
1422 | if (!IO_IS_ALLOCATING(zio)) |
1423 | return (ZIO_PIPELINE_CONTINUE); | |
34dc7c2f | 1424 | |
428870ff BB |
1425 | ASSERT(zio->io_child_type != ZIO_CHILD_DDT); |
1426 | ||
1427 | if (zio->io_bp_override) { | |
3dfb57a3 DB |
1428 | blkptr_t *bp = zio->io_bp; |
1429 | zio_prop_t *zp = &zio->io_prop; | |
1430 | ||
428870ff BB |
1431 | ASSERT(bp->blk_birth != zio->io_txg); |
1432 | ASSERT(BP_GET_DEDUP(zio->io_bp_override) == 0); | |
1433 | ||
1434 | *bp = *zio->io_bp_override; | |
1435 | zio->io_pipeline = ZIO_INTERLOCK_PIPELINE; | |
1436 | ||
9b67f605 MA |
1437 | if (BP_IS_EMBEDDED(bp)) |
1438 | return (ZIO_PIPELINE_CONTINUE); | |
1439 | ||
03c6040b GW |
1440 | /* |
1441 | * If we've been overridden and nopwrite is set then | |
1442 | * set the flag accordingly to indicate that a nopwrite | |
1443 | * has already occurred. | |
1444 | */ | |
1445 | if (!BP_IS_HOLE(bp) && zp->zp_nopwrite) { | |
1446 | ASSERT(!zp->zp_dedup); | |
3dfb57a3 | 1447 | ASSERT3U(BP_GET_CHECKSUM(bp), ==, zp->zp_checksum); |
03c6040b GW |
1448 | zio->io_flags |= ZIO_FLAG_NOPWRITE; |
1449 | return (ZIO_PIPELINE_CONTINUE); | |
1450 | } | |
1451 | ||
1452 | ASSERT(!zp->zp_nopwrite); | |
1453 | ||
428870ff BB |
1454 | if (BP_IS_HOLE(bp) || !zp->zp_dedup) |
1455 | return (ZIO_PIPELINE_CONTINUE); | |
1456 | ||
3c67d83a TH |
1457 | ASSERT((zio_checksum_table[zp->zp_checksum].ci_flags & |
1458 | ZCHECKSUM_FLAG_DEDUP) || zp->zp_dedup_verify); | |
428870ff | 1459 | |
b5256303 TC |
1460 | if (BP_GET_CHECKSUM(bp) == zp->zp_checksum && |
1461 | !zp->zp_encrypt) { | |
428870ff BB |
1462 | BP_SET_DEDUP(bp, 1); |
1463 | zio->io_pipeline |= ZIO_STAGE_DDT_WRITE; | |
1464 | return (ZIO_PIPELINE_CONTINUE); | |
1465 | } | |
3dfb57a3 DB |
1466 | |
1467 | /* | |
1468 | * We were unable to handle this as an override bp, treat | |
1469 | * it as a regular write I/O. | |
1470 | */ | |
5511754b | 1471 | zio->io_bp_override = NULL; |
3dfb57a3 DB |
1472 | *bp = zio->io_bp_orig; |
1473 | zio->io_pipeline = zio->io_orig_pipeline; | |
1474 | } | |
1475 | ||
1476 | return (ZIO_PIPELINE_CONTINUE); | |
1477 | } | |
1478 | ||
1479 | static int | |
1480 | zio_write_compress(zio_t *zio) | |
1481 | { | |
1482 | spa_t *spa = zio->io_spa; | |
1483 | zio_prop_t *zp = &zio->io_prop; | |
1484 | enum zio_compress compress = zp->zp_compress; | |
1485 | blkptr_t *bp = zio->io_bp; | |
1486 | uint64_t lsize = zio->io_lsize; | |
1487 | uint64_t psize = zio->io_size; | |
1488 | int pass = 1; | |
1489 | ||
3dfb57a3 DB |
1490 | /* |
1491 | * If our children haven't all reached the ready stage, | |
1492 | * wait for them and then repeat this pipeline stage. | |
1493 | */ | |
ddc751d5 GW |
1494 | if (zio_wait_for_children(zio, ZIO_CHILD_LOGICAL_BIT | |
1495 | ZIO_CHILD_GANG_BIT, ZIO_WAIT_READY)) { | |
3dfb57a3 | 1496 | return (ZIO_PIPELINE_STOP); |
ddc751d5 | 1497 | } |
3dfb57a3 DB |
1498 | |
1499 | if (!IO_IS_ALLOCATING(zio)) | |
1500 | return (ZIO_PIPELINE_CONTINUE); | |
1501 | ||
1502 | if (zio->io_children_ready != NULL) { | |
1503 | /* | |
1504 | * Now that all our children are ready, run the callback | |
1505 | * associated with this zio in case it wants to modify the | |
1506 | * data to be written. | |
1507 | */ | |
1508 | ASSERT3U(zp->zp_level, >, 0); | |
1509 | zio->io_children_ready(zio); | |
428870ff | 1510 | } |
34dc7c2f | 1511 | |
3dfb57a3 DB |
1512 | ASSERT(zio->io_child_type != ZIO_CHILD_DDT); |
1513 | ASSERT(zio->io_bp_override == NULL); | |
1514 | ||
b0bc7a84 | 1515 | if (!BP_IS_HOLE(bp) && bp->blk_birth == zio->io_txg) { |
b128c09f BB |
1516 | /* |
1517 | * We're rewriting an existing block, which means we're | |
1518 | * working on behalf of spa_sync(). For spa_sync() to | |
1519 | * converge, it must eventually be the case that we don't | |
1520 | * have to allocate new blocks. But compression changes | |
1521 | * the blocksize, which forces a reallocate, and makes | |
1522 | * convergence take longer. Therefore, after the first | |
1523 | * few passes, stop compressing to ensure convergence. | |
1524 | */ | |
428870ff BB |
1525 | pass = spa_sync_pass(spa); |
1526 | ||
1527 | ASSERT(zio->io_txg == spa_syncing_txg(spa)); | |
1528 | ASSERT(zio->io_child_type == ZIO_CHILD_LOGICAL); | |
1529 | ASSERT(!BP_GET_DEDUP(bp)); | |
34dc7c2f | 1530 | |
55d85d5a | 1531 | if (pass >= zfs_sync_pass_dont_compress) |
b128c09f | 1532 | compress = ZIO_COMPRESS_OFF; |
34dc7c2f | 1533 | |
b128c09f | 1534 | /* Make sure someone doesn't change their mind on overwrites */ |
9b67f605 | 1535 | ASSERT(BP_IS_EMBEDDED(bp) || MIN(zp->zp_copies + BP_IS_GANG(bp), |
428870ff | 1536 | spa_max_replication(spa)) == BP_GET_NDVAS(bp)); |
b128c09f | 1537 | } |
34dc7c2f | 1538 | |
2aa34383 | 1539 | /* If it's a compressed write that is not raw, compress the buffer. */ |
b5256303 TC |
1540 | if (compress != ZIO_COMPRESS_OFF && |
1541 | !(zio->io_flags & ZIO_FLAG_RAW_COMPRESS)) { | |
428870ff | 1542 | void *cbuf = zio_buf_alloc(lsize); |
a6255b7f | 1543 | psize = zio_compress_data(compress, zio->io_abd, cbuf, lsize); |
428870ff | 1544 | if (psize == 0 || psize == lsize) { |
b128c09f | 1545 | compress = ZIO_COMPRESS_OFF; |
428870ff | 1546 | zio_buf_free(cbuf, lsize); |
b5256303 TC |
1547 | } else if (!zp->zp_dedup && !zp->zp_encrypt && |
1548 | psize <= BPE_PAYLOAD_SIZE && | |
9b67f605 MA |
1549 | zp->zp_level == 0 && !DMU_OT_HAS_FILL(zp->zp_type) && |
1550 | spa_feature_is_enabled(spa, SPA_FEATURE_EMBEDDED_DATA)) { | |
1551 | encode_embedded_bp_compressed(bp, | |
1552 | cbuf, compress, lsize, psize); | |
1553 | BPE_SET_ETYPE(bp, BP_EMBEDDED_TYPE_DATA); | |
1554 | BP_SET_TYPE(bp, zio->io_prop.zp_type); | |
1555 | BP_SET_LEVEL(bp, zio->io_prop.zp_level); | |
1556 | zio_buf_free(cbuf, lsize); | |
1557 | bp->blk_birth = zio->io_txg; | |
1558 | zio->io_pipeline = ZIO_INTERLOCK_PIPELINE; | |
1559 | ASSERT(spa_feature_is_active(spa, | |
1560 | SPA_FEATURE_EMBEDDED_DATA)); | |
1561 | return (ZIO_PIPELINE_CONTINUE); | |
428870ff | 1562 | } else { |
9b67f605 | 1563 | /* |
c3520e7f MA |
1564 | * Round up compressed size up to the ashift |
1565 | * of the smallest-ashift device, and zero the tail. | |
1566 | * This ensures that the compressed size of the BP | |
1567 | * (and thus compressratio property) are correct, | |
1568 | * in that we charge for the padding used to fill out | |
1569 | * the last sector. | |
9b67f605 | 1570 | */ |
c3520e7f | 1571 | ASSERT3U(spa->spa_min_ashift, >=, SPA_MINBLOCKSHIFT); |
1c27024e | 1572 | size_t rounded = (size_t)P2ROUNDUP(psize, |
c3520e7f MA |
1573 | 1ULL << spa->spa_min_ashift); |
1574 | if (rounded >= lsize) { | |
9b67f605 MA |
1575 | compress = ZIO_COMPRESS_OFF; |
1576 | zio_buf_free(cbuf, lsize); | |
c3520e7f | 1577 | psize = lsize; |
9b67f605 | 1578 | } else { |
a6255b7f DQ |
1579 | abd_t *cdata = abd_get_from_buf(cbuf, lsize); |
1580 | abd_take_ownership_of_buf(cdata, B_TRUE); | |
1581 | abd_zero_off(cdata, psize, rounded - psize); | |
c3520e7f | 1582 | psize = rounded; |
a6255b7f | 1583 | zio_push_transform(zio, cdata, |
9b67f605 MA |
1584 | psize, lsize, NULL); |
1585 | } | |
b128c09f | 1586 | } |
3dfb57a3 DB |
1587 | |
1588 | /* | |
1589 | * We were unable to handle this as an override bp, treat | |
1590 | * it as a regular write I/O. | |
1591 | */ | |
1592 | zio->io_bp_override = NULL; | |
1593 | *bp = zio->io_bp_orig; | |
1594 | zio->io_pipeline = zio->io_orig_pipeline; | |
1595 | ||
b1d21733 TC |
1596 | } else if ((zio->io_flags & ZIO_FLAG_RAW_ENCRYPT) != 0 && |
1597 | zp->zp_type == DMU_OT_DNODE) { | |
1598 | /* | |
1599 | * The DMU actually relies on the zio layer's compression | |
1600 | * to free metadnode blocks that have had all contained | |
1601 | * dnodes freed. As a result, even when doing a raw | |
1602 | * receive, we must check whether the block can be compressed | |
1603 | * to a hole. | |
1604 | */ | |
1605 | psize = zio_compress_data(ZIO_COMPRESS_EMPTY, | |
1606 | zio->io_abd, NULL, lsize); | |
1607 | if (psize == 0) | |
1608 | compress = ZIO_COMPRESS_OFF; | |
2aa34383 DK |
1609 | } else { |
1610 | ASSERT3U(psize, !=, 0); | |
b128c09f | 1611 | } |
34dc7c2f | 1612 | |
b128c09f BB |
1613 | /* |
1614 | * The final pass of spa_sync() must be all rewrites, but the first | |
1615 | * few passes offer a trade-off: allocating blocks defers convergence, | |
1616 | * but newly allocated blocks are sequential, so they can be written | |
1617 | * to disk faster. Therefore, we allow the first few passes of | |
1618 | * spa_sync() to allocate new blocks, but force rewrites after that. | |
1619 | * There should only be a handful of blocks after pass 1 in any case. | |
1620 | */ | |
b0bc7a84 MG |
1621 | if (!BP_IS_HOLE(bp) && bp->blk_birth == zio->io_txg && |
1622 | BP_GET_PSIZE(bp) == psize && | |
55d85d5a | 1623 | pass >= zfs_sync_pass_rewrite) { |
d6320ddb | 1624 | ASSERT(psize != 0); |
1c27024e | 1625 | enum zio_stage gang_stages = zio->io_pipeline & ZIO_GANG_STAGES; |
b128c09f BB |
1626 | zio->io_pipeline = ZIO_REWRITE_PIPELINE | gang_stages; |
1627 | zio->io_flags |= ZIO_FLAG_IO_REWRITE; | |
1628 | } else { | |
1629 | BP_ZERO(bp); | |
1630 | zio->io_pipeline = ZIO_WRITE_PIPELINE; | |
1631 | } | |
34dc7c2f | 1632 | |
428870ff | 1633 | if (psize == 0) { |
b0bc7a84 MG |
1634 | if (zio->io_bp_orig.blk_birth != 0 && |
1635 | spa_feature_is_active(spa, SPA_FEATURE_HOLE_BIRTH)) { | |
1636 | BP_SET_LSIZE(bp, lsize); | |
1637 | BP_SET_TYPE(bp, zp->zp_type); | |
1638 | BP_SET_LEVEL(bp, zp->zp_level); | |
1639 | BP_SET_BIRTH(bp, zio->io_txg, 0); | |
1640 | } | |
b128c09f BB |
1641 | zio->io_pipeline = ZIO_INTERLOCK_PIPELINE; |
1642 | } else { | |
1643 | ASSERT(zp->zp_checksum != ZIO_CHECKSUM_GANG_HEADER); | |
1644 | BP_SET_LSIZE(bp, lsize); | |
b0bc7a84 MG |
1645 | BP_SET_TYPE(bp, zp->zp_type); |
1646 | BP_SET_LEVEL(bp, zp->zp_level); | |
428870ff | 1647 | BP_SET_PSIZE(bp, psize); |
b128c09f BB |
1648 | BP_SET_COMPRESS(bp, compress); |
1649 | BP_SET_CHECKSUM(bp, zp->zp_checksum); | |
428870ff | 1650 | BP_SET_DEDUP(bp, zp->zp_dedup); |
b128c09f | 1651 | BP_SET_BYTEORDER(bp, ZFS_HOST_BYTEORDER); |
428870ff BB |
1652 | if (zp->zp_dedup) { |
1653 | ASSERT(zio->io_child_type == ZIO_CHILD_LOGICAL); | |
1654 | ASSERT(!(zio->io_flags & ZIO_FLAG_IO_REWRITE)); | |
b5256303 TC |
1655 | ASSERT(!zp->zp_encrypt || |
1656 | DMU_OT_IS_ENCRYPTED(zp->zp_type)); | |
428870ff BB |
1657 | zio->io_pipeline = ZIO_DDT_WRITE_PIPELINE; |
1658 | } | |
03c6040b GW |
1659 | if (zp->zp_nopwrite) { |
1660 | ASSERT(zio->io_child_type == ZIO_CHILD_LOGICAL); | |
1661 | ASSERT(!(zio->io_flags & ZIO_FLAG_IO_REWRITE)); | |
1662 | zio->io_pipeline |= ZIO_STAGE_NOP_WRITE; | |
1663 | } | |
428870ff | 1664 | } |
428870ff BB |
1665 | return (ZIO_PIPELINE_CONTINUE); |
1666 | } | |
1667 | ||
1668 | static int | |
1669 | zio_free_bp_init(zio_t *zio) | |
1670 | { | |
1671 | blkptr_t *bp = zio->io_bp; | |
1672 | ||
1673 | if (zio->io_child_type == ZIO_CHILD_LOGICAL) { | |
1674 | if (BP_GET_DEDUP(bp)) | |
1675 | zio->io_pipeline = ZIO_DDT_FREE_PIPELINE; | |
b128c09f | 1676 | } |
34dc7c2f | 1677 | |
a1d477c2 MA |
1678 | ASSERT3P(zio->io_bp, ==, &zio->io_bp_copy); |
1679 | ||
34dc7c2f BB |
1680 | return (ZIO_PIPELINE_CONTINUE); |
1681 | } | |
1682 | ||
b128c09f BB |
1683 | /* |
1684 | * ========================================================================== | |
1685 | * Execute the I/O pipeline | |
1686 | * ========================================================================== | |
1687 | */ | |
1688 | ||
1689 | static void | |
7ef5e54e | 1690 | zio_taskq_dispatch(zio_t *zio, zio_taskq_type_t q, boolean_t cutinline) |
34dc7c2f | 1691 | { |
428870ff | 1692 | spa_t *spa = zio->io_spa; |
b128c09f | 1693 | zio_type_t t = zio->io_type; |
a38718a6 | 1694 | int flags = (cutinline ? TQ_FRONT : 0); |
34dc7c2f BB |
1695 | |
1696 | /* | |
9babb374 BB |
1697 | * If we're a config writer or a probe, the normal issue and |
1698 | * interrupt threads may all be blocked waiting for the config lock. | |
1699 | * In this case, select the otherwise-unused taskq for ZIO_TYPE_NULL. | |
34dc7c2f | 1700 | */ |
9babb374 | 1701 | if (zio->io_flags & (ZIO_FLAG_CONFIG_WRITER | ZIO_FLAG_PROBE)) |
b128c09f | 1702 | t = ZIO_TYPE_NULL; |
34dc7c2f BB |
1703 | |
1704 | /* | |
b128c09f | 1705 | * A similar issue exists for the L2ARC write thread until L2ARC 2.0. |
34dc7c2f | 1706 | */ |
b128c09f BB |
1707 | if (t == ZIO_TYPE_WRITE && zio->io_vd && zio->io_vd->vdev_aux) |
1708 | t = ZIO_TYPE_NULL; | |
34dc7c2f | 1709 | |
428870ff | 1710 | /* |
7ef5e54e AL |
1711 | * If this is a high priority I/O, then use the high priority taskq if |
1712 | * available. | |
428870ff BB |
1713 | */ |
1714 | if (zio->io_priority == ZIO_PRIORITY_NOW && | |
7ef5e54e | 1715 | spa->spa_zio_taskq[t][q + 1].stqs_count != 0) |
428870ff BB |
1716 | q++; |
1717 | ||
1718 | ASSERT3U(q, <, ZIO_TASKQ_TYPES); | |
5cc556b4 | 1719 | |
a38718a6 GA |
1720 | /* |
1721 | * NB: We are assuming that the zio can only be dispatched | |
1722 | * to a single taskq at a time. It would be a grievous error | |
1723 | * to dispatch the zio to another taskq at the same time. | |
1724 | */ | |
1725 | ASSERT(taskq_empty_ent(&zio->io_tqent)); | |
7ef5e54e AL |
1726 | spa_taskq_dispatch_ent(spa, t, q, (task_func_t *)zio_execute, zio, |
1727 | flags, &zio->io_tqent); | |
b128c09f | 1728 | } |
34dc7c2f | 1729 | |
b128c09f | 1730 | static boolean_t |
7ef5e54e | 1731 | zio_taskq_member(zio_t *zio, zio_taskq_type_t q) |
b128c09f BB |
1732 | { |
1733 | kthread_t *executor = zio->io_executor; | |
1734 | spa_t *spa = zio->io_spa; | |
34dc7c2f | 1735 | |
1c27024e | 1736 | for (zio_type_t t = 0; t < ZIO_TYPES; t++) { |
7ef5e54e AL |
1737 | spa_taskqs_t *tqs = &spa->spa_zio_taskq[t][q]; |
1738 | uint_t i; | |
1739 | for (i = 0; i < tqs->stqs_count; i++) { | |
1740 | if (taskq_member(tqs->stqs_taskq[i], executor)) | |
1741 | return (B_TRUE); | |
1742 | } | |
1743 | } | |
34dc7c2f | 1744 | |
b128c09f BB |
1745 | return (B_FALSE); |
1746 | } | |
34dc7c2f | 1747 | |
b128c09f BB |
1748 | static int |
1749 | zio_issue_async(zio_t *zio) | |
1750 | { | |
428870ff | 1751 | zio_taskq_dispatch(zio, ZIO_TASKQ_ISSUE, B_FALSE); |
b128c09f BB |
1752 | |
1753 | return (ZIO_PIPELINE_STOP); | |
34dc7c2f BB |
1754 | } |
1755 | ||
b128c09f BB |
1756 | void |
1757 | zio_interrupt(zio_t *zio) | |
34dc7c2f | 1758 | { |
428870ff | 1759 | zio_taskq_dispatch(zio, ZIO_TASKQ_INTERRUPT, B_FALSE); |
b128c09f | 1760 | } |
34dc7c2f | 1761 | |
26ef0cc7 TH |
1762 | void |
1763 | zio_delay_interrupt(zio_t *zio) | |
1764 | { | |
1765 | /* | |
1766 | * The timeout_generic() function isn't defined in userspace, so | |
1767 | * rather than trying to implement the function, the zio delay | |
1768 | * functionality has been disabled for userspace builds. | |
1769 | */ | |
1770 | ||
1771 | #ifdef _KERNEL | |
1772 | /* | |
1773 | * If io_target_timestamp is zero, then no delay has been registered | |
1774 | * for this IO, thus jump to the end of this function and "skip" the | |
1775 | * delay; issuing it directly to the zio layer. | |
1776 | */ | |
1777 | if (zio->io_target_timestamp != 0) { | |
1778 | hrtime_t now = gethrtime(); | |
1779 | ||
1780 | if (now >= zio->io_target_timestamp) { | |
1781 | /* | |
1782 | * This IO has already taken longer than the target | |
1783 | * delay to complete, so we don't want to delay it | |
1784 | * any longer; we "miss" the delay and issue it | |
1785 | * directly to the zio layer. This is likely due to | |
1786 | * the target latency being set to a value less than | |
1787 | * the underlying hardware can satisfy (e.g. delay | |
1788 | * set to 1ms, but the disks take 10ms to complete an | |
1789 | * IO request). | |
1790 | */ | |
1791 | ||
1792 | DTRACE_PROBE2(zio__delay__miss, zio_t *, zio, | |
1793 | hrtime_t, now); | |
1794 | ||
1795 | zio_interrupt(zio); | |
1796 | } else { | |
1797 | taskqid_t tid; | |
1798 | hrtime_t diff = zio->io_target_timestamp - now; | |
1799 | clock_t expire_at_tick = ddi_get_lbolt() + | |
1800 | NSEC_TO_TICK(diff); | |
1801 | ||
1802 | DTRACE_PROBE3(zio__delay__hit, zio_t *, zio, | |
1803 | hrtime_t, now, hrtime_t, diff); | |
1804 | ||
1805 | if (NSEC_TO_TICK(diff) == 0) { | |
1806 | /* Our delay is less than a jiffy - just spin */ | |
1807 | zfs_sleep_until(zio->io_target_timestamp); | |
1808 | } else { | |
1809 | /* | |
1810 | * Use taskq_dispatch_delay() in the place of | |
1811 | * OpenZFS's timeout_generic(). | |
1812 | */ | |
1813 | tid = taskq_dispatch_delay(system_taskq, | |
02730c33 | 1814 | (task_func_t *)zio_interrupt, |
26ef0cc7 | 1815 | zio, TQ_NOSLEEP, expire_at_tick); |
48d3eb40 | 1816 | if (tid == TASKQID_INVALID) { |
26ef0cc7 TH |
1817 | /* |
1818 | * Couldn't allocate a task. Just | |
1819 | * finish the zio without a delay. | |
1820 | */ | |
1821 | zio_interrupt(zio); | |
1822 | } | |
1823 | } | |
1824 | } | |
1825 | return; | |
1826 | } | |
1827 | #endif | |
1828 | DTRACE_PROBE1(zio__delay__skip, zio_t *, zio); | |
1829 | zio_interrupt(zio); | |
1830 | } | |
1831 | ||
8fb1ede1 BB |
1832 | static void |
1833 | zio_deadman_impl(zio_t *pio) | |
1834 | { | |
1835 | zio_t *cio, *cio_next; | |
1836 | zio_link_t *zl = NULL; | |
1837 | vdev_t *vd = pio->io_vd; | |
1838 | ||
1839 | if (vd != NULL && vd->vdev_ops->vdev_op_leaf) { | |
1840 | vdev_queue_t *vq = &vd->vdev_queue; | |
1841 | zbookmark_phys_t *zb = &pio->io_bookmark; | |
1842 | uint64_t delta = gethrtime() - pio->io_timestamp; | |
1843 | uint64_t failmode = spa_get_deadman_failmode(pio->io_spa); | |
1844 | ||
1845 | zfs_dbgmsg("slow zio: zio=%p timestamp=%llu " | |
1846 | "delta=%llu queued=%llu io=%llu " | |
1847 | "path=%s last=%llu " | |
1848 | "type=%d priority=%d flags=0x%x " | |
1849 | "stage=0x%x pipeline=0x%x pipeline-trace=0x%x " | |
1850 | "objset=%llu object=%llu level=%llu blkid=%llu " | |
1851 | "offset=%llu size=%llu error=%d", | |
1852 | pio, pio->io_timestamp, | |
1853 | delta, pio->io_delta, pio->io_delay, | |
1854 | vd->vdev_path, vq->vq_io_complete_ts, | |
1855 | pio->io_type, pio->io_priority, pio->io_flags, | |
1856 | pio->io_state, pio->io_pipeline, pio->io_pipeline_trace, | |
1857 | zb->zb_objset, zb->zb_object, zb->zb_level, zb->zb_blkid, | |
1858 | pio->io_offset, pio->io_size, pio->io_error); | |
1859 | zfs_ereport_post(FM_EREPORT_ZFS_DEADMAN, | |
1860 | pio->io_spa, vd, zb, pio, 0, 0); | |
1861 | ||
1862 | if (failmode == ZIO_FAILURE_MODE_CONTINUE && | |
1863 | taskq_empty_ent(&pio->io_tqent)) { | |
1864 | zio_interrupt(pio); | |
1865 | } | |
1866 | } | |
1867 | ||
1868 | mutex_enter(&pio->io_lock); | |
1869 | for (cio = zio_walk_children(pio, &zl); cio != NULL; cio = cio_next) { | |
1870 | cio_next = zio_walk_children(pio, &zl); | |
1871 | zio_deadman_impl(cio); | |
1872 | } | |
1873 | mutex_exit(&pio->io_lock); | |
1874 | } | |
1875 | ||
1876 | /* | |
1877 | * Log the critical information describing this zio and all of its children | |
1878 | * using the zfs_dbgmsg() interface then post deadman event for the ZED. | |
1879 | */ | |
1880 | void | |
1881 | zio_deadman(zio_t *pio, char *tag) | |
1882 | { | |
1883 | spa_t *spa = pio->io_spa; | |
1884 | char *name = spa_name(spa); | |
1885 | ||
1886 | if (!zfs_deadman_enabled || spa_suspended(spa)) | |
1887 | return; | |
1888 | ||
1889 | zio_deadman_impl(pio); | |
1890 | ||
1891 | switch (spa_get_deadman_failmode(spa)) { | |
1892 | case ZIO_FAILURE_MODE_WAIT: | |
1893 | zfs_dbgmsg("%s waiting for hung I/O to pool '%s'", tag, name); | |
1894 | break; | |
1895 | ||
1896 | case ZIO_FAILURE_MODE_CONTINUE: | |
1897 | zfs_dbgmsg("%s restarting hung I/O for pool '%s'", tag, name); | |
1898 | break; | |
1899 | ||
1900 | case ZIO_FAILURE_MODE_PANIC: | |
1901 | fm_panic("%s determined I/O to pool '%s' is hung.", tag, name); | |
1902 | break; | |
1903 | } | |
1904 | } | |
1905 | ||
b128c09f BB |
1906 | /* |
1907 | * Execute the I/O pipeline until one of the following occurs: | |
1908 | * (1) the I/O completes; (2) the pipeline stalls waiting for | |
1909 | * dependent child I/Os; (3) the I/O issues, so we're waiting | |
1910 | * for an I/O completion interrupt; (4) the I/O is delegated by | |
1911 | * vdev-level caching or aggregation; (5) the I/O is deferred | |
1912 | * due to vdev-level queueing; (6) the I/O is handed off to | |
1913 | * another thread. In all cases, the pipeline stops whenever | |
8e07b99b | 1914 | * there's no CPU work; it never burns a thread in cv_wait_io(). |
b128c09f BB |
1915 | * |
1916 | * There's no locking on io_stage because there's no legitimate way | |
1917 | * for multiple threads to be attempting to process the same I/O. | |
1918 | */ | |
428870ff | 1919 | static zio_pipe_stage_t *zio_pipeline[]; |
34dc7c2f | 1920 | |
da6b4005 NB |
1921 | /* |
1922 | * zio_execute() is a wrapper around the static function | |
1923 | * __zio_execute() so that we can force __zio_execute() to be | |
1924 | * inlined. This reduces stack overhead which is important | |
1925 | * because __zio_execute() is called recursively in several zio | |
1926 | * code paths. zio_execute() itself cannot be inlined because | |
1927 | * it is externally visible. | |
1928 | */ | |
b128c09f BB |
1929 | void |
1930 | zio_execute(zio_t *zio) | |
da6b4005 | 1931 | { |
92119cc2 BB |
1932 | fstrans_cookie_t cookie; |
1933 | ||
1934 | cookie = spl_fstrans_mark(); | |
da6b4005 | 1935 | __zio_execute(zio); |
92119cc2 | 1936 | spl_fstrans_unmark(cookie); |
da6b4005 NB |
1937 | } |
1938 | ||
b58986ee BB |
1939 | /* |
1940 | * Used to determine if in the current context the stack is sized large | |
1941 | * enough to allow zio_execute() to be called recursively. A minimum | |
1942 | * stack size of 16K is required to avoid needing to re-dispatch the zio. | |
1943 | */ | |
1944 | boolean_t | |
1945 | zio_execute_stack_check(zio_t *zio) | |
1946 | { | |
1947 | #if !defined(HAVE_LARGE_STACKS) | |
1948 | dsl_pool_t *dp = spa_get_dsl(zio->io_spa); | |
1949 | ||
1950 | /* Executing in txg_sync_thread() context. */ | |
1951 | if (dp && curthread == dp->dp_tx.tx_sync_thread) | |
1952 | return (B_TRUE); | |
1953 | ||
1954 | /* Pool initialization outside of zio_taskq context. */ | |
1955 | if (dp && spa_is_initializing(dp->dp_spa) && | |
1956 | !zio_taskq_member(zio, ZIO_TASKQ_ISSUE) && | |
1957 | !zio_taskq_member(zio, ZIO_TASKQ_ISSUE_HIGH)) | |
1958 | return (B_TRUE); | |
1959 | #endif /* HAVE_LARGE_STACKS */ | |
1960 | ||
1961 | return (B_FALSE); | |
1962 | } | |
1963 | ||
da6b4005 NB |
1964 | __attribute__((always_inline)) |
1965 | static inline void | |
1966 | __zio_execute(zio_t *zio) | |
b128c09f BB |
1967 | { |
1968 | zio->io_executor = curthread; | |
34dc7c2f | 1969 | |
3dfb57a3 DB |
1970 | ASSERT3U(zio->io_queued_timestamp, >, 0); |
1971 | ||
b128c09f | 1972 | while (zio->io_stage < ZIO_STAGE_DONE) { |
428870ff BB |
1973 | enum zio_stage pipeline = zio->io_pipeline; |
1974 | enum zio_stage stage = zio->io_stage; | |
b128c09f | 1975 | int rv; |
34dc7c2f | 1976 | |
b128c09f | 1977 | ASSERT(!MUTEX_HELD(&zio->io_lock)); |
428870ff BB |
1978 | ASSERT(ISP2(stage)); |
1979 | ASSERT(zio->io_stall == NULL); | |
34dc7c2f | 1980 | |
428870ff BB |
1981 | do { |
1982 | stage <<= 1; | |
1983 | } while ((stage & pipeline) == 0); | |
b128c09f BB |
1984 | |
1985 | ASSERT(stage <= ZIO_STAGE_DONE); | |
34dc7c2f BB |
1986 | |
1987 | /* | |
b128c09f BB |
1988 | * If we are in interrupt context and this pipeline stage |
1989 | * will grab a config lock that is held across I/O, | |
428870ff BB |
1990 | * or may wait for an I/O that needs an interrupt thread |
1991 | * to complete, issue async to avoid deadlock. | |
1992 | * | |
1993 | * For VDEV_IO_START, we cut in line so that the io will | |
1994 | * be sent to disk promptly. | |
34dc7c2f | 1995 | */ |
91579709 BB |
1996 | if ((stage & ZIO_BLOCKING_STAGES) && zio->io_vd == NULL && |
1997 | zio_taskq_member(zio, ZIO_TASKQ_INTERRUPT)) { | |
b58986ee BB |
1998 | boolean_t cut = (stage == ZIO_STAGE_VDEV_IO_START) ? |
1999 | zio_requeue_io_start_cut_in_line : B_FALSE; | |
91579709 BB |
2000 | zio_taskq_dispatch(zio, ZIO_TASKQ_ISSUE, cut); |
2001 | return; | |
2002 | } | |
2003 | ||
2004 | /* | |
b58986ee BB |
2005 | * If the current context doesn't have large enough stacks |
2006 | * the zio must be issued asynchronously to prevent overflow. | |
91579709 | 2007 | */ |
b58986ee BB |
2008 | if (zio_execute_stack_check(zio)) { |
2009 | boolean_t cut = (stage == ZIO_STAGE_VDEV_IO_START) ? | |
2010 | zio_requeue_io_start_cut_in_line : B_FALSE; | |
428870ff | 2011 | zio_taskq_dispatch(zio, ZIO_TASKQ_ISSUE, cut); |
b128c09f | 2012 | return; |
34dc7c2f BB |
2013 | } |
2014 | ||
b128c09f | 2015 | zio->io_stage = stage; |
3dfb57a3 | 2016 | zio->io_pipeline_trace |= zio->io_stage; |
9bd274dd | 2017 | rv = zio_pipeline[highbit64(stage) - 1](zio); |
34dc7c2f | 2018 | |
b128c09f BB |
2019 | if (rv == ZIO_PIPELINE_STOP) |
2020 | return; | |
34dc7c2f | 2021 | |
b128c09f BB |
2022 | ASSERT(rv == ZIO_PIPELINE_CONTINUE); |
2023 | } | |
34dc7c2f BB |
2024 | } |
2025 | ||
da6b4005 | 2026 | |
b128c09f BB |
2027 | /* |
2028 | * ========================================================================== | |
2029 | * Initiate I/O, either sync or async | |
2030 | * ========================================================================== | |
2031 | */ | |
2032 | int | |
2033 | zio_wait(zio_t *zio) | |
34dc7c2f | 2034 | { |
8fb1ede1 | 2035 | long timeout = MSEC_TO_TICK(zfs_deadman_ziotime_ms); |
b128c09f | 2036 | int error; |
34dc7c2f | 2037 | |
1ce23dca PS |
2038 | ASSERT3S(zio->io_stage, ==, ZIO_STAGE_OPEN); |
2039 | ASSERT3P(zio->io_executor, ==, NULL); | |
34dc7c2f | 2040 | |
b128c09f | 2041 | zio->io_waiter = curthread; |
3dfb57a3 DB |
2042 | ASSERT0(zio->io_queued_timestamp); |
2043 | zio->io_queued_timestamp = gethrtime(); | |
34dc7c2f | 2044 | |
da6b4005 | 2045 | __zio_execute(zio); |
34dc7c2f | 2046 | |
b128c09f | 2047 | mutex_enter(&zio->io_lock); |
8fb1ede1 BB |
2048 | while (zio->io_executor != NULL) { |
2049 | error = cv_timedwait_io(&zio->io_cv, &zio->io_lock, | |
2050 | ddi_get_lbolt() + timeout); | |
2051 | ||
2052 | if (zfs_deadman_enabled && error == -1 && | |
2053 | gethrtime() - zio->io_queued_timestamp > | |
2054 | spa_deadman_ziotime(zio->io_spa)) { | |
2055 | mutex_exit(&zio->io_lock); | |
2056 | timeout = MSEC_TO_TICK(zfs_deadman_checktime_ms); | |
2057 | zio_deadman(zio, FTAG); | |
2058 | mutex_enter(&zio->io_lock); | |
2059 | } | |
2060 | } | |
b128c09f | 2061 | mutex_exit(&zio->io_lock); |
34dc7c2f | 2062 | |
b128c09f BB |
2063 | error = zio->io_error; |
2064 | zio_destroy(zio); | |
34dc7c2f | 2065 | |
b128c09f BB |
2066 | return (error); |
2067 | } | |
34dc7c2f | 2068 | |
b128c09f BB |
2069 | void |
2070 | zio_nowait(zio_t *zio) | |
2071 | { | |
1ce23dca | 2072 | ASSERT3P(zio->io_executor, ==, NULL); |
34dc7c2f | 2073 | |
d164b209 BB |
2074 | if (zio->io_child_type == ZIO_CHILD_LOGICAL && |
2075 | zio_unique_parent(zio) == NULL) { | |
8878261f BB |
2076 | zio_t *pio; |
2077 | ||
34dc7c2f | 2078 | /* |
b128c09f | 2079 | * This is a logical async I/O with no parent to wait for it. |
9babb374 BB |
2080 | * We add it to the spa_async_root_zio "Godfather" I/O which |
2081 | * will ensure they complete prior to unloading the pool. | |
34dc7c2f | 2082 | */ |
b128c09f | 2083 | spa_t *spa = zio->io_spa; |
8878261f BB |
2084 | kpreempt_disable(); |
2085 | pio = spa->spa_async_zio_root[CPU_SEQID]; | |
2086 | kpreempt_enable(); | |
9babb374 | 2087 | |
8878261f | 2088 | zio_add_child(pio, zio); |
b128c09f | 2089 | } |
34dc7c2f | 2090 | |
3dfb57a3 DB |
2091 | ASSERT0(zio->io_queued_timestamp); |
2092 | zio->io_queued_timestamp = gethrtime(); | |
da6b4005 | 2093 | __zio_execute(zio); |
b128c09f | 2094 | } |
34dc7c2f | 2095 | |
b128c09f BB |
2096 | /* |
2097 | * ========================================================================== | |
1ce23dca | 2098 | * Reexecute, cancel, or suspend/resume failed I/O |
b128c09f BB |
2099 | * ========================================================================== |
2100 | */ | |
34dc7c2f | 2101 | |
b128c09f BB |
2102 | static void |
2103 | zio_reexecute(zio_t *pio) | |
2104 | { | |
d164b209 BB |
2105 | zio_t *cio, *cio_next; |
2106 | ||
2107 | ASSERT(pio->io_child_type == ZIO_CHILD_LOGICAL); | |
2108 | ASSERT(pio->io_orig_stage == ZIO_STAGE_OPEN); | |
9babb374 BB |
2109 | ASSERT(pio->io_gang_leader == NULL); |
2110 | ASSERT(pio->io_gang_tree == NULL); | |
34dc7c2f | 2111 | |
b128c09f BB |
2112 | pio->io_flags = pio->io_orig_flags; |
2113 | pio->io_stage = pio->io_orig_stage; | |
2114 | pio->io_pipeline = pio->io_orig_pipeline; | |
2115 | pio->io_reexecute = 0; | |
03c6040b | 2116 | pio->io_flags |= ZIO_FLAG_REEXECUTED; |
3dfb57a3 | 2117 | pio->io_pipeline_trace = 0; |
b128c09f | 2118 | pio->io_error = 0; |
1c27024e | 2119 | for (int w = 0; w < ZIO_WAIT_TYPES; w++) |
d164b209 | 2120 | pio->io_state[w] = 0; |
1c27024e | 2121 | for (int c = 0; c < ZIO_CHILD_TYPES; c++) |
b128c09f | 2122 | pio->io_child_error[c] = 0; |
34dc7c2f | 2123 | |
428870ff BB |
2124 | if (IO_IS_ALLOCATING(pio)) |
2125 | BP_ZERO(pio->io_bp); | |
34dc7c2f | 2126 | |
b128c09f BB |
2127 | /* |
2128 | * As we reexecute pio's children, new children could be created. | |
d164b209 | 2129 | * New children go to the head of pio's io_child_list, however, |
b128c09f | 2130 | * so we will (correctly) not reexecute them. The key is that |
d164b209 BB |
2131 | * the remainder of pio's io_child_list, from 'cio_next' onward, |
2132 | * cannot be affected by any side effects of reexecuting 'cio'. | |
b128c09f | 2133 | */ |
1c27024e | 2134 | zio_link_t *zl = NULL; |
a8b2e306 | 2135 | mutex_enter(&pio->io_lock); |
3dfb57a3 DB |
2136 | for (cio = zio_walk_children(pio, &zl); cio != NULL; cio = cio_next) { |
2137 | cio_next = zio_walk_children(pio, &zl); | |
1c27024e | 2138 | for (int w = 0; w < ZIO_WAIT_TYPES; w++) |
d164b209 | 2139 | pio->io_children[cio->io_child_type][w]++; |
b128c09f | 2140 | mutex_exit(&pio->io_lock); |
d164b209 | 2141 | zio_reexecute(cio); |
a8b2e306 | 2142 | mutex_enter(&pio->io_lock); |
34dc7c2f | 2143 | } |
a8b2e306 | 2144 | mutex_exit(&pio->io_lock); |
34dc7c2f | 2145 | |
b128c09f BB |
2146 | /* |
2147 | * Now that all children have been reexecuted, execute the parent. | |
9babb374 | 2148 | * We don't reexecute "The Godfather" I/O here as it's the |
9e2c3bb4 | 2149 | * responsibility of the caller to wait on it. |
b128c09f | 2150 | */ |
3dfb57a3 DB |
2151 | if (!(pio->io_flags & ZIO_FLAG_GODFATHER)) { |
2152 | pio->io_queued_timestamp = gethrtime(); | |
da6b4005 | 2153 | __zio_execute(pio); |
3dfb57a3 | 2154 | } |
34dc7c2f BB |
2155 | } |
2156 | ||
b128c09f | 2157 | void |
cec3a0a1 | 2158 | zio_suspend(spa_t *spa, zio_t *zio, zio_suspend_reason_t reason) |
34dc7c2f | 2159 | { |
b128c09f BB |
2160 | if (spa_get_failmode(spa) == ZIO_FAILURE_MODE_PANIC) |
2161 | fm_panic("Pool '%s' has encountered an uncorrectable I/O " | |
2162 | "failure and the failure mode property for this pool " | |
2163 | "is set to panic.", spa_name(spa)); | |
34dc7c2f | 2164 | |
bf89c199 BB |
2165 | cmn_err(CE_WARN, "Pool '%s' has encountered an uncorrectable I/O " |
2166 | "failure and has been suspended.\n", spa_name(spa)); | |
2167 | ||
b5256303 TC |
2168 | zfs_ereport_post(FM_EREPORT_ZFS_IO_FAILURE, spa, NULL, |
2169 | NULL, NULL, 0, 0); | |
34dc7c2f | 2170 | |
b128c09f | 2171 | mutex_enter(&spa->spa_suspend_lock); |
34dc7c2f | 2172 | |
b128c09f | 2173 | if (spa->spa_suspend_zio_root == NULL) |
9babb374 BB |
2174 | spa->spa_suspend_zio_root = zio_root(spa, NULL, NULL, |
2175 | ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE | | |
2176 | ZIO_FLAG_GODFATHER); | |
34dc7c2f | 2177 | |
cec3a0a1 | 2178 | spa->spa_suspended = reason; |
34dc7c2f | 2179 | |
b128c09f | 2180 | if (zio != NULL) { |
9babb374 | 2181 | ASSERT(!(zio->io_flags & ZIO_FLAG_GODFATHER)); |
b128c09f BB |
2182 | ASSERT(zio != spa->spa_suspend_zio_root); |
2183 | ASSERT(zio->io_child_type == ZIO_CHILD_LOGICAL); | |
d164b209 | 2184 | ASSERT(zio_unique_parent(zio) == NULL); |
b128c09f BB |
2185 | ASSERT(zio->io_stage == ZIO_STAGE_DONE); |
2186 | zio_add_child(spa->spa_suspend_zio_root, zio); | |
2187 | } | |
34dc7c2f | 2188 | |
b128c09f BB |
2189 | mutex_exit(&spa->spa_suspend_lock); |
2190 | } | |
34dc7c2f | 2191 | |
9babb374 | 2192 | int |
b128c09f BB |
2193 | zio_resume(spa_t *spa) |
2194 | { | |
9babb374 | 2195 | zio_t *pio; |
34dc7c2f BB |
2196 | |
2197 | /* | |
b128c09f | 2198 | * Reexecute all previously suspended i/o. |
34dc7c2f | 2199 | */ |
b128c09f | 2200 | mutex_enter(&spa->spa_suspend_lock); |
cec3a0a1 | 2201 | spa->spa_suspended = ZIO_SUSPEND_NONE; |
b128c09f BB |
2202 | cv_broadcast(&spa->spa_suspend_cv); |
2203 | pio = spa->spa_suspend_zio_root; | |
2204 | spa->spa_suspend_zio_root = NULL; | |
2205 | mutex_exit(&spa->spa_suspend_lock); | |
2206 | ||
2207 | if (pio == NULL) | |
9babb374 | 2208 | return (0); |
34dc7c2f | 2209 | |
9babb374 BB |
2210 | zio_reexecute(pio); |
2211 | return (zio_wait(pio)); | |
b128c09f BB |
2212 | } |
2213 | ||
2214 | void | |
2215 | zio_resume_wait(spa_t *spa) | |
2216 | { | |
2217 | mutex_enter(&spa->spa_suspend_lock); | |
2218 | while (spa_suspended(spa)) | |
2219 | cv_wait(&spa->spa_suspend_cv, &spa->spa_suspend_lock); | |
2220 | mutex_exit(&spa->spa_suspend_lock); | |
34dc7c2f BB |
2221 | } |
2222 | ||
2223 | /* | |
2224 | * ========================================================================== | |
b128c09f BB |
2225 | * Gang blocks. |
2226 | * | |
2227 | * A gang block is a collection of small blocks that looks to the DMU | |
2228 | * like one large block. When zio_dva_allocate() cannot find a block | |
2229 | * of the requested size, due to either severe fragmentation or the pool | |
2230 | * being nearly full, it calls zio_write_gang_block() to construct the | |
2231 | * block from smaller fragments. | |
2232 | * | |
2233 | * A gang block consists of a gang header (zio_gbh_phys_t) and up to | |
2234 | * three (SPA_GBH_NBLKPTRS) gang members. The gang header is just like | |
2235 | * an indirect block: it's an array of block pointers. It consumes | |
2236 | * only one sector and hence is allocatable regardless of fragmentation. | |
2237 | * The gang header's bps point to its gang members, which hold the data. | |
2238 | * | |
2239 | * Gang blocks are self-checksumming, using the bp's <vdev, offset, txg> | |
2240 | * as the verifier to ensure uniqueness of the SHA256 checksum. | |
2241 | * Critically, the gang block bp's blk_cksum is the checksum of the data, | |
2242 | * not the gang header. This ensures that data block signatures (needed for | |
2243 | * deduplication) are independent of how the block is physically stored. | |
2244 | * | |
2245 | * Gang blocks can be nested: a gang member may itself be a gang block. | |
2246 | * Thus every gang block is a tree in which root and all interior nodes are | |
2247 | * gang headers, and the leaves are normal blocks that contain user data. | |
2248 | * The root of the gang tree is called the gang leader. | |
2249 | * | |
2250 | * To perform any operation (read, rewrite, free, claim) on a gang block, | |
2251 | * zio_gang_assemble() first assembles the gang tree (minus data leaves) | |
2252 | * in the io_gang_tree field of the original logical i/o by recursively | |
2253 | * reading the gang leader and all gang headers below it. This yields | |
2254 | * an in-core tree containing the contents of every gang header and the | |
2255 | * bps for every constituent of the gang block. | |
2256 | * | |
2257 | * With the gang tree now assembled, zio_gang_issue() just walks the gang tree | |
2258 | * and invokes a callback on each bp. To free a gang block, zio_gang_issue() | |
2259 | * calls zio_free_gang() -- a trivial wrapper around zio_free() -- for each bp. | |
2260 | * zio_claim_gang() provides a similarly trivial wrapper for zio_claim(). | |
2261 | * zio_read_gang() is a wrapper around zio_read() that omits reading gang | |
2262 | * headers, since we already have those in io_gang_tree. zio_rewrite_gang() | |
2263 | * performs a zio_rewrite() of the data or, for gang headers, a zio_rewrite() | |
2264 | * of the gang header plus zio_checksum_compute() of the data to update the | |
2265 | * gang header's blk_cksum as described above. | |
2266 | * | |
2267 | * The two-phase assemble/issue model solves the problem of partial failure -- | |
2268 | * what if you'd freed part of a gang block but then couldn't read the | |
2269 | * gang header for another part? Assembling the entire gang tree first | |
2270 | * ensures that all the necessary gang header I/O has succeeded before | |
2271 | * starting the actual work of free, claim, or write. Once the gang tree | |
2272 | * is assembled, free and claim are in-memory operations that cannot fail. | |
2273 | * | |
2274 | * In the event that a gang write fails, zio_dva_unallocate() walks the | |
2275 | * gang tree to immediately free (i.e. insert back into the space map) | |
2276 | * everything we've allocated. This ensures that we don't get ENOSPC | |
2277 | * errors during repeated suspend/resume cycles due to a flaky device. | |
2278 | * | |
2279 | * Gang rewrites only happen during sync-to-convergence. If we can't assemble | |
2280 | * the gang tree, we won't modify the block, so we can safely defer the free | |
2281 | * (knowing that the block is still intact). If we *can* assemble the gang | |
2282 | * tree, then even if some of the rewrites fail, zio_dva_unallocate() will free | |
2283 | * each constituent bp and we can allocate a new block on the next sync pass. | |
2284 | * | |
2285 | * In all cases, the gang tree allows complete recovery from partial failure. | |
34dc7c2f BB |
2286 | * ========================================================================== |
2287 | */ | |
b128c09f | 2288 | |
a6255b7f DQ |
2289 | static void |
2290 | zio_gang_issue_func_done(zio_t *zio) | |
2291 | { | |
2292 | abd_put(zio->io_abd); | |
2293 | } | |
2294 | ||
b128c09f | 2295 | static zio_t * |
a6255b7f DQ |
2296 | zio_read_gang(zio_t *pio, blkptr_t *bp, zio_gang_node_t *gn, abd_t *data, |
2297 | uint64_t offset) | |
34dc7c2f | 2298 | { |
b128c09f BB |
2299 | if (gn != NULL) |
2300 | return (pio); | |
34dc7c2f | 2301 | |
a6255b7f DQ |
2302 | return (zio_read(pio, pio->io_spa, bp, abd_get_offset(data, offset), |
2303 | BP_GET_PSIZE(bp), zio_gang_issue_func_done, | |
2304 | NULL, pio->io_priority, ZIO_GANG_CHILD_FLAGS(pio), | |
b128c09f BB |
2305 | &pio->io_bookmark)); |
2306 | } | |
2307 | ||
a6255b7f DQ |
2308 | static zio_t * |
2309 | zio_rewrite_gang(zio_t *pio, blkptr_t *bp, zio_gang_node_t *gn, abd_t *data, | |
2310 | uint64_t offset) | |
b128c09f BB |
2311 | { |
2312 | zio_t *zio; | |
2313 | ||
2314 | if (gn != NULL) { | |
a6255b7f DQ |
2315 | abd_t *gbh_abd = |
2316 | abd_get_from_buf(gn->gn_gbh, SPA_GANGBLOCKSIZE); | |
b128c09f | 2317 | zio = zio_rewrite(pio, pio->io_spa, pio->io_txg, bp, |
a6255b7f DQ |
2318 | gbh_abd, SPA_GANGBLOCKSIZE, zio_gang_issue_func_done, NULL, |
2319 | pio->io_priority, ZIO_GANG_CHILD_FLAGS(pio), | |
2320 | &pio->io_bookmark); | |
34dc7c2f | 2321 | /* |
b128c09f BB |
2322 | * As we rewrite each gang header, the pipeline will compute |
2323 | * a new gang block header checksum for it; but no one will | |
2324 | * compute a new data checksum, so we do that here. The one | |
2325 | * exception is the gang leader: the pipeline already computed | |
2326 | * its data checksum because that stage precedes gang assembly. | |
2327 | * (Presently, nothing actually uses interior data checksums; | |
2328 | * this is just good hygiene.) | |
34dc7c2f | 2329 | */ |
9babb374 | 2330 | if (gn != pio->io_gang_leader->io_gang_tree) { |
a6255b7f DQ |
2331 | abd_t *buf = abd_get_offset(data, offset); |
2332 | ||
b128c09f | 2333 | zio_checksum_compute(zio, BP_GET_CHECKSUM(bp), |
a6255b7f DQ |
2334 | buf, BP_GET_PSIZE(bp)); |
2335 | ||
2336 | abd_put(buf); | |
b128c09f | 2337 | } |
428870ff BB |
2338 | /* |
2339 | * If we are here to damage data for testing purposes, | |
2340 | * leave the GBH alone so that we can detect the damage. | |
2341 | */ | |
2342 | if (pio->io_gang_leader->io_flags & ZIO_FLAG_INDUCE_DAMAGE) | |
2343 | zio->io_pipeline &= ~ZIO_VDEV_IO_STAGES; | |
34dc7c2f | 2344 | } else { |
b128c09f | 2345 | zio = zio_rewrite(pio, pio->io_spa, pio->io_txg, bp, |
a6255b7f DQ |
2346 | abd_get_offset(data, offset), BP_GET_PSIZE(bp), |
2347 | zio_gang_issue_func_done, NULL, pio->io_priority, | |
b128c09f | 2348 | ZIO_GANG_CHILD_FLAGS(pio), &pio->io_bookmark); |
34dc7c2f BB |
2349 | } |
2350 | ||
b128c09f BB |
2351 | return (zio); |
2352 | } | |
34dc7c2f | 2353 | |
b128c09f | 2354 | /* ARGSUSED */ |
a6255b7f DQ |
2355 | static zio_t * |
2356 | zio_free_gang(zio_t *pio, blkptr_t *bp, zio_gang_node_t *gn, abd_t *data, | |
2357 | uint64_t offset) | |
b128c09f | 2358 | { |
428870ff BB |
2359 | return (zio_free_sync(pio, pio->io_spa, pio->io_txg, bp, |
2360 | ZIO_GANG_CHILD_FLAGS(pio))); | |
34dc7c2f BB |
2361 | } |
2362 | ||
b128c09f | 2363 | /* ARGSUSED */ |
a6255b7f DQ |
2364 | static zio_t * |
2365 | zio_claim_gang(zio_t *pio, blkptr_t *bp, zio_gang_node_t *gn, abd_t *data, | |
2366 | uint64_t offset) | |
34dc7c2f | 2367 | { |
b128c09f BB |
2368 | return (zio_claim(pio, pio->io_spa, pio->io_txg, bp, |
2369 | NULL, NULL, ZIO_GANG_CHILD_FLAGS(pio))); | |
2370 | } | |
2371 | ||
2372 | static zio_gang_issue_func_t *zio_gang_issue_func[ZIO_TYPES] = { | |
2373 | NULL, | |
2374 | zio_read_gang, | |
2375 | zio_rewrite_gang, | |
2376 | zio_free_gang, | |
2377 | zio_claim_gang, | |
2378 | NULL | |
2379 | }; | |
34dc7c2f | 2380 | |
b128c09f | 2381 | static void zio_gang_tree_assemble_done(zio_t *zio); |
34dc7c2f | 2382 | |
b128c09f BB |
2383 | static zio_gang_node_t * |
2384 | zio_gang_node_alloc(zio_gang_node_t **gnpp) | |
2385 | { | |
2386 | zio_gang_node_t *gn; | |
34dc7c2f | 2387 | |
b128c09f | 2388 | ASSERT(*gnpp == NULL); |
34dc7c2f | 2389 | |
79c76d5b | 2390 | gn = kmem_zalloc(sizeof (*gn), KM_SLEEP); |
b128c09f BB |
2391 | gn->gn_gbh = zio_buf_alloc(SPA_GANGBLOCKSIZE); |
2392 | *gnpp = gn; | |
34dc7c2f | 2393 | |
b128c09f | 2394 | return (gn); |
34dc7c2f BB |
2395 | } |
2396 | ||
34dc7c2f | 2397 | static void |
b128c09f | 2398 | zio_gang_node_free(zio_gang_node_t **gnpp) |
34dc7c2f | 2399 | { |
b128c09f | 2400 | zio_gang_node_t *gn = *gnpp; |
34dc7c2f | 2401 | |
1c27024e | 2402 | for (int g = 0; g < SPA_GBH_NBLKPTRS; g++) |
b128c09f BB |
2403 | ASSERT(gn->gn_child[g] == NULL); |
2404 | ||
2405 | zio_buf_free(gn->gn_gbh, SPA_GANGBLOCKSIZE); | |
2406 | kmem_free(gn, sizeof (*gn)); | |
2407 | *gnpp = NULL; | |
34dc7c2f BB |
2408 | } |
2409 | ||
b128c09f BB |
2410 | static void |
2411 | zio_gang_tree_free(zio_gang_node_t **gnpp) | |
34dc7c2f | 2412 | { |
b128c09f | 2413 | zio_gang_node_t *gn = *gnpp; |
34dc7c2f | 2414 | |
b128c09f BB |
2415 | if (gn == NULL) |
2416 | return; | |
34dc7c2f | 2417 | |
1c27024e | 2418 | for (int g = 0; g < SPA_GBH_NBLKPTRS; g++) |
b128c09f | 2419 | zio_gang_tree_free(&gn->gn_child[g]); |
34dc7c2f | 2420 | |
b128c09f | 2421 | zio_gang_node_free(gnpp); |
34dc7c2f BB |
2422 | } |
2423 | ||
b128c09f | 2424 | static void |
9babb374 | 2425 | zio_gang_tree_assemble(zio_t *gio, blkptr_t *bp, zio_gang_node_t **gnpp) |
34dc7c2f | 2426 | { |
b128c09f | 2427 | zio_gang_node_t *gn = zio_gang_node_alloc(gnpp); |
a6255b7f | 2428 | abd_t *gbh_abd = abd_get_from_buf(gn->gn_gbh, SPA_GANGBLOCKSIZE); |
b128c09f | 2429 | |
9babb374 | 2430 | ASSERT(gio->io_gang_leader == gio); |
b128c09f | 2431 | ASSERT(BP_IS_GANG(bp)); |
34dc7c2f | 2432 | |
a6255b7f DQ |
2433 | zio_nowait(zio_read(gio, gio->io_spa, bp, gbh_abd, SPA_GANGBLOCKSIZE, |
2434 | zio_gang_tree_assemble_done, gn, gio->io_priority, | |
2435 | ZIO_GANG_CHILD_FLAGS(gio), &gio->io_bookmark)); | |
b128c09f | 2436 | } |
34dc7c2f | 2437 | |
b128c09f BB |
2438 | static void |
2439 | zio_gang_tree_assemble_done(zio_t *zio) | |
2440 | { | |
9babb374 | 2441 | zio_t *gio = zio->io_gang_leader; |
b128c09f BB |
2442 | zio_gang_node_t *gn = zio->io_private; |
2443 | blkptr_t *bp = zio->io_bp; | |
34dc7c2f | 2444 | |
9babb374 | 2445 | ASSERT(gio == zio_unique_parent(zio)); |
428870ff | 2446 | ASSERT(zio->io_child_count == 0); |
34dc7c2f | 2447 | |
b128c09f BB |
2448 | if (zio->io_error) |
2449 | return; | |
34dc7c2f | 2450 | |
a6255b7f | 2451 | /* this ABD was created from a linear buf in zio_gang_tree_assemble */ |
b128c09f | 2452 | if (BP_SHOULD_BYTESWAP(bp)) |
a6255b7f | 2453 | byteswap_uint64_array(abd_to_buf(zio->io_abd), zio->io_size); |
34dc7c2f | 2454 | |
a6255b7f | 2455 | ASSERT3P(abd_to_buf(zio->io_abd), ==, gn->gn_gbh); |
b128c09f | 2456 | ASSERT(zio->io_size == SPA_GANGBLOCKSIZE); |
428870ff | 2457 | ASSERT(gn->gn_gbh->zg_tail.zec_magic == ZEC_MAGIC); |
34dc7c2f | 2458 | |
a6255b7f DQ |
2459 | abd_put(zio->io_abd); |
2460 | ||
1c27024e | 2461 | for (int g = 0; g < SPA_GBH_NBLKPTRS; g++) { |
b128c09f BB |
2462 | blkptr_t *gbp = &gn->gn_gbh->zg_blkptr[g]; |
2463 | if (!BP_IS_GANG(gbp)) | |
2464 | continue; | |
9babb374 | 2465 | zio_gang_tree_assemble(gio, gbp, &gn->gn_child[g]); |
b128c09f | 2466 | } |
34dc7c2f BB |
2467 | } |
2468 | ||
b128c09f | 2469 | static void |
a6255b7f DQ |
2470 | zio_gang_tree_issue(zio_t *pio, zio_gang_node_t *gn, blkptr_t *bp, abd_t *data, |
2471 | uint64_t offset) | |
34dc7c2f | 2472 | { |
9babb374 | 2473 | zio_t *gio = pio->io_gang_leader; |
b128c09f | 2474 | zio_t *zio; |
34dc7c2f | 2475 | |
b128c09f | 2476 | ASSERT(BP_IS_GANG(bp) == !!gn); |
9babb374 BB |
2477 | ASSERT(BP_GET_CHECKSUM(bp) == BP_GET_CHECKSUM(gio->io_bp)); |
2478 | ASSERT(BP_GET_LSIZE(bp) == BP_GET_PSIZE(bp) || gn == gio->io_gang_tree); | |
34dc7c2f | 2479 | |
b128c09f BB |
2480 | /* |
2481 | * If you're a gang header, your data is in gn->gn_gbh. | |
2482 | * If you're a gang member, your data is in 'data' and gn == NULL. | |
2483 | */ | |
a6255b7f | 2484 | zio = zio_gang_issue_func[gio->io_type](pio, bp, gn, data, offset); |
34dc7c2f | 2485 | |
b128c09f | 2486 | if (gn != NULL) { |
428870ff | 2487 | ASSERT(gn->gn_gbh->zg_tail.zec_magic == ZEC_MAGIC); |
34dc7c2f | 2488 | |
1c27024e | 2489 | for (int g = 0; g < SPA_GBH_NBLKPTRS; g++) { |
b128c09f BB |
2490 | blkptr_t *gbp = &gn->gn_gbh->zg_blkptr[g]; |
2491 | if (BP_IS_HOLE(gbp)) | |
2492 | continue; | |
a6255b7f DQ |
2493 | zio_gang_tree_issue(zio, gn->gn_child[g], gbp, data, |
2494 | offset); | |
2495 | offset += BP_GET_PSIZE(gbp); | |
b128c09f | 2496 | } |
34dc7c2f BB |
2497 | } |
2498 | ||
9babb374 | 2499 | if (gn == gio->io_gang_tree) |
a6255b7f | 2500 | ASSERT3U(gio->io_size, ==, offset); |
34dc7c2f | 2501 | |
b128c09f BB |
2502 | if (zio != pio) |
2503 | zio_nowait(zio); | |
34dc7c2f BB |
2504 | } |
2505 | ||
2506 | static int | |
b128c09f | 2507 | zio_gang_assemble(zio_t *zio) |
34dc7c2f | 2508 | { |
b128c09f | 2509 | blkptr_t *bp = zio->io_bp; |
34dc7c2f | 2510 | |
9babb374 BB |
2511 | ASSERT(BP_IS_GANG(bp) && zio->io_gang_leader == NULL); |
2512 | ASSERT(zio->io_child_type > ZIO_CHILD_GANG); | |
2513 | ||
2514 | zio->io_gang_leader = zio; | |
34dc7c2f | 2515 | |
b128c09f | 2516 | zio_gang_tree_assemble(zio, bp, &zio->io_gang_tree); |
34dc7c2f BB |
2517 | |
2518 | return (ZIO_PIPELINE_CONTINUE); | |
2519 | } | |
2520 | ||
2521 | static int | |
b128c09f | 2522 | zio_gang_issue(zio_t *zio) |
34dc7c2f | 2523 | { |
b128c09f | 2524 | blkptr_t *bp = zio->io_bp; |
34dc7c2f | 2525 | |
ddc751d5 | 2526 | if (zio_wait_for_children(zio, ZIO_CHILD_GANG_BIT, ZIO_WAIT_DONE)) { |
b128c09f | 2527 | return (ZIO_PIPELINE_STOP); |
ddc751d5 | 2528 | } |
34dc7c2f | 2529 | |
9babb374 BB |
2530 | ASSERT(BP_IS_GANG(bp) && zio->io_gang_leader == zio); |
2531 | ASSERT(zio->io_child_type > ZIO_CHILD_GANG); | |
34dc7c2f | 2532 | |
b128c09f | 2533 | if (zio->io_child_error[ZIO_CHILD_GANG] == 0) |
a6255b7f DQ |
2534 | zio_gang_tree_issue(zio, zio->io_gang_tree, bp, zio->io_abd, |
2535 | 0); | |
b128c09f | 2536 | else |
9babb374 | 2537 | zio_gang_tree_free(&zio->io_gang_tree); |
34dc7c2f | 2538 | |
b128c09f | 2539 | zio->io_pipeline = ZIO_INTERLOCK_PIPELINE; |
34dc7c2f BB |
2540 | |
2541 | return (ZIO_PIPELINE_CONTINUE); | |
2542 | } | |
2543 | ||
2544 | static void | |
b128c09f | 2545 | zio_write_gang_member_ready(zio_t *zio) |
34dc7c2f | 2546 | { |
d164b209 | 2547 | zio_t *pio = zio_unique_parent(zio); |
34dc7c2f BB |
2548 | dva_t *cdva = zio->io_bp->blk_dva; |
2549 | dva_t *pdva = pio->io_bp->blk_dva; | |
2550 | uint64_t asize; | |
d1d7e268 | 2551 | ASSERTV(zio_t *gio = zio->io_gang_leader); |
34dc7c2f | 2552 | |
b128c09f BB |
2553 | if (BP_IS_HOLE(zio->io_bp)) |
2554 | return; | |
2555 | ||
2556 | ASSERT(BP_IS_HOLE(&zio->io_bp_orig)); | |
2557 | ||
2558 | ASSERT(zio->io_child_type == ZIO_CHILD_GANG); | |
428870ff BB |
2559 | ASSERT3U(zio->io_prop.zp_copies, ==, gio->io_prop.zp_copies); |
2560 | ASSERT3U(zio->io_prop.zp_copies, <=, BP_GET_NDVAS(zio->io_bp)); | |
2561 | ASSERT3U(pio->io_prop.zp_copies, <=, BP_GET_NDVAS(pio->io_bp)); | |
34dc7c2f | 2562 | ASSERT3U(BP_GET_NDVAS(zio->io_bp), <=, BP_GET_NDVAS(pio->io_bp)); |
34dc7c2f BB |
2563 | |
2564 | mutex_enter(&pio->io_lock); | |
1c27024e | 2565 | for (int d = 0; d < BP_GET_NDVAS(zio->io_bp); d++) { |
34dc7c2f BB |
2566 | ASSERT(DVA_GET_GANG(&pdva[d])); |
2567 | asize = DVA_GET_ASIZE(&pdva[d]); | |
2568 | asize += DVA_GET_ASIZE(&cdva[d]); | |
2569 | DVA_SET_ASIZE(&pdva[d], asize); | |
2570 | } | |
2571 | mutex_exit(&pio->io_lock); | |
2572 | } | |
2573 | ||
a6255b7f DQ |
2574 | static void |
2575 | zio_write_gang_done(zio_t *zio) | |
2576 | { | |
2577 | abd_put(zio->io_abd); | |
2578 | } | |
2579 | ||
34dc7c2f | 2580 | static int |
b128c09f | 2581 | zio_write_gang_block(zio_t *pio) |
34dc7c2f | 2582 | { |
b128c09f | 2583 | spa_t *spa = pio->io_spa; |
3dfb57a3 | 2584 | metaslab_class_t *mc = spa_normal_class(spa); |
b128c09f | 2585 | blkptr_t *bp = pio->io_bp; |
9babb374 | 2586 | zio_t *gio = pio->io_gang_leader; |
b128c09f BB |
2587 | zio_t *zio; |
2588 | zio_gang_node_t *gn, **gnpp; | |
34dc7c2f | 2589 | zio_gbh_phys_t *gbh; |
a6255b7f | 2590 | abd_t *gbh_abd; |
b128c09f BB |
2591 | uint64_t txg = pio->io_txg; |
2592 | uint64_t resid = pio->io_size; | |
2593 | uint64_t lsize; | |
428870ff | 2594 | int copies = gio->io_prop.zp_copies; |
b5256303 | 2595 | int gbh_copies; |
b128c09f | 2596 | zio_prop_t zp; |
1c27024e | 2597 | int error; |
b5256303 TC |
2598 | |
2599 | /* | |
2600 | * encrypted blocks need DVA[2] free so encrypted gang headers can't | |
2601 | * have a third copy. | |
2602 | */ | |
2603 | gbh_copies = MIN(copies + 1, spa_max_replication(spa)); | |
2604 | if (gio->io_prop.zp_encrypt && gbh_copies >= SPA_DVAS_PER_BP) | |
2605 | gbh_copies = SPA_DVAS_PER_BP - 1; | |
2606 | ||
1c27024e | 2607 | int flags = METASLAB_HINTBP_FAVOR | METASLAB_GANG_HEADER; |
3dfb57a3 DB |
2608 | if (pio->io_flags & ZIO_FLAG_IO_ALLOCATING) { |
2609 | ASSERT(pio->io_priority == ZIO_PRIORITY_ASYNC_WRITE); | |
2610 | ASSERT(!(pio->io_flags & ZIO_FLAG_NODATA)); | |
2611 | ||
2612 | flags |= METASLAB_ASYNC_ALLOC; | |
2613 | VERIFY(refcount_held(&mc->mc_alloc_slots, pio)); | |
2614 | ||
2615 | /* | |
2616 | * The logical zio has already placed a reservation for | |
2617 | * 'copies' allocation slots but gang blocks may require | |
2618 | * additional copies. These additional copies | |
2619 | * (i.e. gbh_copies - copies) are guaranteed to succeed | |
2620 | * since metaslab_class_throttle_reserve() always allows | |
2621 | * additional reservations for gang blocks. | |
2622 | */ | |
2623 | VERIFY(metaslab_class_throttle_reserve(mc, gbh_copies - copies, | |
2624 | pio, flags)); | |
2625 | } | |
2626 | ||
2627 | error = metaslab_alloc(spa, mc, SPA_GANGBLOCKSIZE, | |
4e21fd06 DB |
2628 | bp, gbh_copies, txg, pio == gio ? NULL : gio->io_bp, flags, |
2629 | &pio->io_alloc_list, pio); | |
34dc7c2f | 2630 | if (error) { |
3dfb57a3 DB |
2631 | if (pio->io_flags & ZIO_FLAG_IO_ALLOCATING) { |
2632 | ASSERT(pio->io_priority == ZIO_PRIORITY_ASYNC_WRITE); | |
2633 | ASSERT(!(pio->io_flags & ZIO_FLAG_NODATA)); | |
2634 | ||
2635 | /* | |
2636 | * If we failed to allocate the gang block header then | |
2637 | * we remove any additional allocation reservations that | |
2638 | * we placed here. The original reservation will | |
2639 | * be removed when the logical I/O goes to the ready | |
2640 | * stage. | |
2641 | */ | |
2642 | metaslab_class_throttle_unreserve(mc, | |
2643 | gbh_copies - copies, pio); | |
2644 | } | |
2645 | ||
b128c09f | 2646 | pio->io_error = error; |
34dc7c2f BB |
2647 | return (ZIO_PIPELINE_CONTINUE); |
2648 | } | |
2649 | ||
9babb374 BB |
2650 | if (pio == gio) { |
2651 | gnpp = &gio->io_gang_tree; | |
b128c09f BB |
2652 | } else { |
2653 | gnpp = pio->io_private; | |
2654 | ASSERT(pio->io_ready == zio_write_gang_member_ready); | |
34dc7c2f BB |
2655 | } |
2656 | ||
b128c09f BB |
2657 | gn = zio_gang_node_alloc(gnpp); |
2658 | gbh = gn->gn_gbh; | |
2659 | bzero(gbh, SPA_GANGBLOCKSIZE); | |
a6255b7f | 2660 | gbh_abd = abd_get_from_buf(gbh, SPA_GANGBLOCKSIZE); |
34dc7c2f | 2661 | |
b128c09f BB |
2662 | /* |
2663 | * Create the gang header. | |
2664 | */ | |
a6255b7f DQ |
2665 | zio = zio_rewrite(pio, spa, txg, bp, gbh_abd, SPA_GANGBLOCKSIZE, |
2666 | zio_write_gang_done, NULL, pio->io_priority, | |
2667 | ZIO_GANG_CHILD_FLAGS(pio), &pio->io_bookmark); | |
34dc7c2f | 2668 | |
b128c09f BB |
2669 | /* |
2670 | * Create and nowait the gang children. | |
2671 | */ | |
1c27024e | 2672 | for (int g = 0; resid != 0; resid -= lsize, g++) { |
b128c09f BB |
2673 | lsize = P2ROUNDUP(resid / (SPA_GBH_NBLKPTRS - g), |
2674 | SPA_MINBLOCKSIZE); | |
2675 | ASSERT(lsize >= SPA_MINBLOCKSIZE && lsize <= resid); | |
2676 | ||
9babb374 | 2677 | zp.zp_checksum = gio->io_prop.zp_checksum; |
b128c09f BB |
2678 | zp.zp_compress = ZIO_COMPRESS_OFF; |
2679 | zp.zp_type = DMU_OT_NONE; | |
2680 | zp.zp_level = 0; | |
428870ff | 2681 | zp.zp_copies = gio->io_prop.zp_copies; |
03c6040b GW |
2682 | zp.zp_dedup = B_FALSE; |
2683 | zp.zp_dedup_verify = B_FALSE; | |
2684 | zp.zp_nopwrite = B_FALSE; | |
4807c0ba TC |
2685 | zp.zp_encrypt = gio->io_prop.zp_encrypt; |
2686 | zp.zp_byteorder = gio->io_prop.zp_byteorder; | |
b5256303 TC |
2687 | bzero(zp.zp_salt, ZIO_DATA_SALT_LEN); |
2688 | bzero(zp.zp_iv, ZIO_DATA_IV_LEN); | |
2689 | bzero(zp.zp_mac, ZIO_DATA_MAC_LEN); | |
b128c09f | 2690 | |
1c27024e | 2691 | zio_t *cio = zio_write(zio, spa, txg, &gbh->zg_blkptr[g], |
a6255b7f DQ |
2692 | abd_get_offset(pio->io_abd, pio->io_size - resid), lsize, |
2693 | lsize, &zp, zio_write_gang_member_ready, NULL, NULL, | |
2694 | zio_write_gang_done, &gn->gn_child[g], pio->io_priority, | |
3dfb57a3 DB |
2695 | ZIO_GANG_CHILD_FLAGS(pio), &pio->io_bookmark); |
2696 | ||
2697 | if (pio->io_flags & ZIO_FLAG_IO_ALLOCATING) { | |
2698 | ASSERT(pio->io_priority == ZIO_PRIORITY_ASYNC_WRITE); | |
2699 | ASSERT(!(pio->io_flags & ZIO_FLAG_NODATA)); | |
2700 | ||
2701 | /* | |
2702 | * Gang children won't throttle but we should | |
2703 | * account for their work, so reserve an allocation | |
2704 | * slot for them here. | |
2705 | */ | |
2706 | VERIFY(metaslab_class_throttle_reserve(mc, | |
2707 | zp.zp_copies, cio, flags)); | |
2708 | } | |
2709 | zio_nowait(cio); | |
b128c09f | 2710 | } |
34dc7c2f BB |
2711 | |
2712 | /* | |
b128c09f | 2713 | * Set pio's pipeline to just wait for zio to finish. |
34dc7c2f | 2714 | */ |
b128c09f BB |
2715 | pio->io_pipeline = ZIO_INTERLOCK_PIPELINE; |
2716 | ||
920dd524 ED |
2717 | /* |
2718 | * We didn't allocate this bp, so make sure it doesn't get unmarked. | |
2719 | */ | |
2720 | pio->io_flags &= ~ZIO_FLAG_FASTWRITE; | |
2721 | ||
b128c09f BB |
2722 | zio_nowait(zio); |
2723 | ||
2724 | return (ZIO_PIPELINE_CONTINUE); | |
34dc7c2f BB |
2725 | } |
2726 | ||
03c6040b | 2727 | /* |
3c67d83a TH |
2728 | * The zio_nop_write stage in the pipeline determines if allocating a |
2729 | * new bp is necessary. The nopwrite feature can handle writes in | |
2730 | * either syncing or open context (i.e. zil writes) and as a result is | |
2731 | * mutually exclusive with dedup. | |
2732 | * | |
2733 | * By leveraging a cryptographically secure checksum, such as SHA256, we | |
2734 | * can compare the checksums of the new data and the old to determine if | |
2735 | * allocating a new block is required. Note that our requirements for | |
2736 | * cryptographic strength are fairly weak: there can't be any accidental | |
2737 | * hash collisions, but we don't need to be secure against intentional | |
2738 | * (malicious) collisions. To trigger a nopwrite, you have to be able | |
2739 | * to write the file to begin with, and triggering an incorrect (hash | |
2740 | * collision) nopwrite is no worse than simply writing to the file. | |
2741 | * That said, there are no known attacks against the checksum algorithms | |
2742 | * used for nopwrite, assuming that the salt and the checksums | |
2743 | * themselves remain secret. | |
03c6040b GW |
2744 | */ |
2745 | static int | |
2746 | zio_nop_write(zio_t *zio) | |
2747 | { | |
2748 | blkptr_t *bp = zio->io_bp; | |
2749 | blkptr_t *bp_orig = &zio->io_bp_orig; | |
2750 | zio_prop_t *zp = &zio->io_prop; | |
2751 | ||
2752 | ASSERT(BP_GET_LEVEL(bp) == 0); | |
2753 | ASSERT(!(zio->io_flags & ZIO_FLAG_IO_REWRITE)); | |
2754 | ASSERT(zp->zp_nopwrite); | |
2755 | ASSERT(!zp->zp_dedup); | |
2756 | ASSERT(zio->io_bp_override == NULL); | |
2757 | ASSERT(IO_IS_ALLOCATING(zio)); | |
2758 | ||
2759 | /* | |
2760 | * Check to see if the original bp and the new bp have matching | |
2761 | * characteristics (i.e. same checksum, compression algorithms, etc). | |
2762 | * If they don't then just continue with the pipeline which will | |
2763 | * allocate a new bp. | |
2764 | */ | |
2765 | if (BP_IS_HOLE(bp_orig) || | |
3c67d83a TH |
2766 | !(zio_checksum_table[BP_GET_CHECKSUM(bp)].ci_flags & |
2767 | ZCHECKSUM_FLAG_NOPWRITE) || | |
b5256303 | 2768 | BP_IS_ENCRYPTED(bp) || BP_IS_ENCRYPTED(bp_orig) || |
03c6040b GW |
2769 | BP_GET_CHECKSUM(bp) != BP_GET_CHECKSUM(bp_orig) || |
2770 | BP_GET_COMPRESS(bp) != BP_GET_COMPRESS(bp_orig) || | |
2771 | BP_GET_DEDUP(bp) != BP_GET_DEDUP(bp_orig) || | |
2772 | zp->zp_copies != BP_GET_NDVAS(bp_orig)) | |
2773 | return (ZIO_PIPELINE_CONTINUE); | |
2774 | ||
2775 | /* | |
2776 | * If the checksums match then reset the pipeline so that we | |
2777 | * avoid allocating a new bp and issuing any I/O. | |
2778 | */ | |
2779 | if (ZIO_CHECKSUM_EQUAL(bp->blk_cksum, bp_orig->blk_cksum)) { | |
3c67d83a TH |
2780 | ASSERT(zio_checksum_table[zp->zp_checksum].ci_flags & |
2781 | ZCHECKSUM_FLAG_NOPWRITE); | |
03c6040b GW |
2782 | ASSERT3U(BP_GET_PSIZE(bp), ==, BP_GET_PSIZE(bp_orig)); |
2783 | ASSERT3U(BP_GET_LSIZE(bp), ==, BP_GET_LSIZE(bp_orig)); | |
2784 | ASSERT(zp->zp_compress != ZIO_COMPRESS_OFF); | |
2785 | ASSERT(bcmp(&bp->blk_prop, &bp_orig->blk_prop, | |
2786 | sizeof (uint64_t)) == 0); | |
2787 | ||
2788 | *bp = *bp_orig; | |
2789 | zio->io_pipeline = ZIO_INTERLOCK_PIPELINE; | |
2790 | zio->io_flags |= ZIO_FLAG_NOPWRITE; | |
2791 | } | |
2792 | ||
2793 | return (ZIO_PIPELINE_CONTINUE); | |
2794 | } | |
2795 | ||
34dc7c2f BB |
2796 | /* |
2797 | * ========================================================================== | |
428870ff | 2798 | * Dedup |
34dc7c2f BB |
2799 | * ========================================================================== |
2800 | */ | |
428870ff BB |
2801 | static void |
2802 | zio_ddt_child_read_done(zio_t *zio) | |
2803 | { | |
2804 | blkptr_t *bp = zio->io_bp; | |
2805 | ddt_entry_t *dde = zio->io_private; | |
2806 | ddt_phys_t *ddp; | |
2807 | zio_t *pio = zio_unique_parent(zio); | |
2808 | ||
2809 | mutex_enter(&pio->io_lock); | |
2810 | ddp = ddt_phys_select(dde, bp); | |
2811 | if (zio->io_error == 0) | |
2812 | ddt_phys_clear(ddp); /* this ddp doesn't need repair */ | |
a6255b7f DQ |
2813 | |
2814 | if (zio->io_error == 0 && dde->dde_repair_abd == NULL) | |
2815 | dde->dde_repair_abd = zio->io_abd; | |
428870ff | 2816 | else |
a6255b7f | 2817 | abd_free(zio->io_abd); |
428870ff BB |
2818 | mutex_exit(&pio->io_lock); |
2819 | } | |
2820 | ||
2821 | static int | |
2822 | zio_ddt_read_start(zio_t *zio) | |
2823 | { | |
2824 | blkptr_t *bp = zio->io_bp; | |
2825 | ||
2826 | ASSERT(BP_GET_DEDUP(bp)); | |
2827 | ASSERT(BP_GET_PSIZE(bp) == zio->io_size); | |
2828 | ASSERT(zio->io_child_type == ZIO_CHILD_LOGICAL); | |
2829 | ||
2830 | if (zio->io_child_error[ZIO_CHILD_DDT]) { | |
2831 | ddt_t *ddt = ddt_select(zio->io_spa, bp); | |
2832 | ddt_entry_t *dde = ddt_repair_start(ddt, bp); | |
2833 | ddt_phys_t *ddp = dde->dde_phys; | |
2834 | ddt_phys_t *ddp_self = ddt_phys_select(dde, bp); | |
2835 | blkptr_t blk; | |
2836 | ||
2837 | ASSERT(zio->io_vsd == NULL); | |
2838 | zio->io_vsd = dde; | |
2839 | ||
2840 | if (ddp_self == NULL) | |
2841 | return (ZIO_PIPELINE_CONTINUE); | |
2842 | ||
1c27024e | 2843 | for (int p = 0; p < DDT_PHYS_TYPES; p++, ddp++) { |
428870ff BB |
2844 | if (ddp->ddp_phys_birth == 0 || ddp == ddp_self) |
2845 | continue; | |
2846 | ddt_bp_create(ddt->ddt_checksum, &dde->dde_key, ddp, | |
2847 | &blk); | |
2848 | zio_nowait(zio_read(zio, zio->io_spa, &blk, | |
a6255b7f DQ |
2849 | abd_alloc_for_io(zio->io_size, B_TRUE), |
2850 | zio->io_size, zio_ddt_child_read_done, dde, | |
2851 | zio->io_priority, ZIO_DDT_CHILD_FLAGS(zio) | | |
2852 | ZIO_FLAG_DONT_PROPAGATE, &zio->io_bookmark)); | |
428870ff BB |
2853 | } |
2854 | return (ZIO_PIPELINE_CONTINUE); | |
2855 | } | |
2856 | ||
2857 | zio_nowait(zio_read(zio, zio->io_spa, bp, | |
a6255b7f | 2858 | zio->io_abd, zio->io_size, NULL, NULL, zio->io_priority, |
428870ff BB |
2859 | ZIO_DDT_CHILD_FLAGS(zio), &zio->io_bookmark)); |
2860 | ||
2861 | return (ZIO_PIPELINE_CONTINUE); | |
2862 | } | |
2863 | ||
2864 | static int | |
2865 | zio_ddt_read_done(zio_t *zio) | |
2866 | { | |
2867 | blkptr_t *bp = zio->io_bp; | |
2868 | ||
ddc751d5 | 2869 | if (zio_wait_for_children(zio, ZIO_CHILD_DDT_BIT, ZIO_WAIT_DONE)) { |
428870ff | 2870 | return (ZIO_PIPELINE_STOP); |
ddc751d5 | 2871 | } |
428870ff BB |
2872 | |
2873 | ASSERT(BP_GET_DEDUP(bp)); | |
2874 | ASSERT(BP_GET_PSIZE(bp) == zio->io_size); | |
2875 | ASSERT(zio->io_child_type == ZIO_CHILD_LOGICAL); | |
2876 | ||
2877 | if (zio->io_child_error[ZIO_CHILD_DDT]) { | |
2878 | ddt_t *ddt = ddt_select(zio->io_spa, bp); | |
2879 | ddt_entry_t *dde = zio->io_vsd; | |
2880 | if (ddt == NULL) { | |
2881 | ASSERT(spa_load_state(zio->io_spa) != SPA_LOAD_NONE); | |
2882 | return (ZIO_PIPELINE_CONTINUE); | |
2883 | } | |
2884 | if (dde == NULL) { | |
2885 | zio->io_stage = ZIO_STAGE_DDT_READ_START >> 1; | |
2886 | zio_taskq_dispatch(zio, ZIO_TASKQ_ISSUE, B_FALSE); | |
2887 | return (ZIO_PIPELINE_STOP); | |
2888 | } | |
a6255b7f DQ |
2889 | if (dde->dde_repair_abd != NULL) { |
2890 | abd_copy(zio->io_abd, dde->dde_repair_abd, | |
2891 | zio->io_size); | |
428870ff BB |
2892 | zio->io_child_error[ZIO_CHILD_DDT] = 0; |
2893 | } | |
2894 | ddt_repair_done(ddt, dde); | |
2895 | zio->io_vsd = NULL; | |
2896 | } | |
2897 | ||
2898 | ASSERT(zio->io_vsd == NULL); | |
2899 | ||
2900 | return (ZIO_PIPELINE_CONTINUE); | |
2901 | } | |
2902 | ||
2903 | static boolean_t | |
2904 | zio_ddt_collision(zio_t *zio, ddt_t *ddt, ddt_entry_t *dde) | |
2905 | { | |
2906 | spa_t *spa = zio->io_spa; | |
c17bcf83 | 2907 | boolean_t do_raw = !!(zio->io_flags & ZIO_FLAG_RAW); |
428870ff | 2908 | |
c17bcf83 | 2909 | ASSERT(!(zio->io_bp_override && do_raw)); |
2aa34383 | 2910 | |
428870ff BB |
2911 | /* |
2912 | * Note: we compare the original data, not the transformed data, | |
2913 | * because when zio->io_bp is an override bp, we will not have | |
2914 | * pushed the I/O transforms. That's an important optimization | |
2915 | * because otherwise we'd compress/encrypt all dmu_sync() data twice. | |
c17bcf83 | 2916 | * However, we should never get a raw, override zio so in these |
b5256303 | 2917 | * cases we can compare the io_abd directly. This is useful because |
c17bcf83 TC |
2918 | * it allows us to do dedup verification even if we don't have access |
2919 | * to the original data (for instance, if the encryption keys aren't | |
2920 | * loaded). | |
428870ff | 2921 | */ |
c17bcf83 | 2922 | |
1c27024e | 2923 | for (int p = DDT_PHYS_SINGLE; p <= DDT_PHYS_TRIPLE; p++) { |
428870ff BB |
2924 | zio_t *lio = dde->dde_lead_zio[p]; |
2925 | ||
c17bcf83 TC |
2926 | if (lio != NULL && do_raw) { |
2927 | return (lio->io_size != zio->io_size || | |
a6255b7f | 2928 | abd_cmp(zio->io_abd, lio->io_abd) != 0); |
c17bcf83 | 2929 | } else if (lio != NULL) { |
428870ff | 2930 | return (lio->io_orig_size != zio->io_orig_size || |
a6255b7f | 2931 | abd_cmp(zio->io_orig_abd, lio->io_orig_abd) != 0); |
428870ff BB |
2932 | } |
2933 | } | |
2934 | ||
1c27024e | 2935 | for (int p = DDT_PHYS_SINGLE; p <= DDT_PHYS_TRIPLE; p++) { |
428870ff BB |
2936 | ddt_phys_t *ddp = &dde->dde_phys[p]; |
2937 | ||
c17bcf83 TC |
2938 | if (ddp->ddp_phys_birth != 0 && do_raw) { |
2939 | blkptr_t blk = *zio->io_bp; | |
2940 | uint64_t psize; | |
a6255b7f | 2941 | abd_t *tmpabd; |
c17bcf83 TC |
2942 | int error; |
2943 | ||
2944 | ddt_bp_fill(ddp, &blk, ddp->ddp_phys_birth); | |
2945 | psize = BP_GET_PSIZE(&blk); | |
2946 | ||
2947 | if (psize != zio->io_size) | |
2948 | return (B_TRUE); | |
2949 | ||
2950 | ddt_exit(ddt); | |
2951 | ||
a6255b7f | 2952 | tmpabd = abd_alloc_for_io(psize, B_TRUE); |
c17bcf83 | 2953 | |
a6255b7f | 2954 | error = zio_wait(zio_read(NULL, spa, &blk, tmpabd, |
c17bcf83 TC |
2955 | psize, NULL, NULL, ZIO_PRIORITY_SYNC_READ, |
2956 | ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE | | |
2957 | ZIO_FLAG_RAW, &zio->io_bookmark)); | |
2958 | ||
2959 | if (error == 0) { | |
a6255b7f | 2960 | if (abd_cmp(tmpabd, zio->io_abd) != 0) |
c17bcf83 TC |
2961 | error = SET_ERROR(ENOENT); |
2962 | } | |
2963 | ||
a6255b7f | 2964 | abd_free(tmpabd); |
c17bcf83 TC |
2965 | ddt_enter(ddt); |
2966 | return (error != 0); | |
2967 | } else if (ddp->ddp_phys_birth != 0) { | |
428870ff | 2968 | arc_buf_t *abuf = NULL; |
2a432414 | 2969 | arc_flags_t aflags = ARC_FLAG_WAIT; |
428870ff BB |
2970 | blkptr_t blk = *zio->io_bp; |
2971 | int error; | |
2972 | ||
2973 | ddt_bp_fill(ddp, &blk, ddp->ddp_phys_birth); | |
2974 | ||
c17bcf83 TC |
2975 | if (BP_GET_LSIZE(&blk) != zio->io_orig_size) |
2976 | return (B_TRUE); | |
2977 | ||
428870ff BB |
2978 | ddt_exit(ddt); |
2979 | ||
294f6806 | 2980 | error = arc_read(NULL, spa, &blk, |
428870ff BB |
2981 | arc_getbuf_func, &abuf, ZIO_PRIORITY_SYNC_READ, |
2982 | ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE, | |
2983 | &aflags, &zio->io_bookmark); | |
2984 | ||
2985 | if (error == 0) { | |
a6255b7f | 2986 | if (abd_cmp_buf(zio->io_orig_abd, abuf->b_data, |
428870ff | 2987 | zio->io_orig_size) != 0) |
c17bcf83 | 2988 | error = SET_ERROR(ENOENT); |
d3c2ae1c | 2989 | arc_buf_destroy(abuf, &abuf); |
428870ff BB |
2990 | } |
2991 | ||
2992 | ddt_enter(ddt); | |
2993 | return (error != 0); | |
2994 | } | |
2995 | } | |
2996 | ||
2997 | return (B_FALSE); | |
2998 | } | |
2999 | ||
3000 | static void | |
3001 | zio_ddt_child_write_ready(zio_t *zio) | |
3002 | { | |
3003 | int p = zio->io_prop.zp_copies; | |
3004 | ddt_t *ddt = ddt_select(zio->io_spa, zio->io_bp); | |
3005 | ddt_entry_t *dde = zio->io_private; | |
3006 | ddt_phys_t *ddp = &dde->dde_phys[p]; | |
3007 | zio_t *pio; | |
3008 | ||
3009 | if (zio->io_error) | |
3010 | return; | |
3011 | ||
3012 | ddt_enter(ddt); | |
3013 | ||
3014 | ASSERT(dde->dde_lead_zio[p] == zio); | |
3015 | ||
3016 | ddt_phys_fill(ddp, zio->io_bp); | |
3017 | ||
1c27024e | 3018 | zio_link_t *zl = NULL; |
3dfb57a3 | 3019 | while ((pio = zio_walk_parents(zio, &zl)) != NULL) |
428870ff BB |
3020 | ddt_bp_fill(ddp, pio->io_bp, zio->io_txg); |
3021 | ||
3022 | ddt_exit(ddt); | |
3023 | } | |
3024 | ||
3025 | static void | |
3026 | zio_ddt_child_write_done(zio_t *zio) | |
3027 | { | |
3028 | int p = zio->io_prop.zp_copies; | |
3029 | ddt_t *ddt = ddt_select(zio->io_spa, zio->io_bp); | |
3030 | ddt_entry_t *dde = zio->io_private; | |
3031 | ddt_phys_t *ddp = &dde->dde_phys[p]; | |
3032 | ||
3033 | ddt_enter(ddt); | |
3034 | ||
3035 | ASSERT(ddp->ddp_refcnt == 0); | |
3036 | ASSERT(dde->dde_lead_zio[p] == zio); | |
3037 | dde->dde_lead_zio[p] = NULL; | |
3038 | ||
3039 | if (zio->io_error == 0) { | |
3dfb57a3 DB |
3040 | zio_link_t *zl = NULL; |
3041 | while (zio_walk_parents(zio, &zl) != NULL) | |
428870ff BB |
3042 | ddt_phys_addref(ddp); |
3043 | } else { | |
3044 | ddt_phys_clear(ddp); | |
3045 | } | |
3046 | ||
3047 | ddt_exit(ddt); | |
3048 | } | |
3049 | ||
3050 | static void | |
3051 | zio_ddt_ditto_write_done(zio_t *zio) | |
3052 | { | |
3053 | int p = DDT_PHYS_DITTO; | |
1c27024e | 3054 | ASSERTV(zio_prop_t *zp = &zio->io_prop); |
428870ff BB |
3055 | blkptr_t *bp = zio->io_bp; |
3056 | ddt_t *ddt = ddt_select(zio->io_spa, bp); | |
3057 | ddt_entry_t *dde = zio->io_private; | |
3058 | ddt_phys_t *ddp = &dde->dde_phys[p]; | |
3059 | ddt_key_t *ddk = &dde->dde_key; | |
3060 | ||
3061 | ddt_enter(ddt); | |
3062 | ||
3063 | ASSERT(ddp->ddp_refcnt == 0); | |
3064 | ASSERT(dde->dde_lead_zio[p] == zio); | |
3065 | dde->dde_lead_zio[p] = NULL; | |
3066 | ||
3067 | if (zio->io_error == 0) { | |
3068 | ASSERT(ZIO_CHECKSUM_EQUAL(bp->blk_cksum, ddk->ddk_cksum)); | |
3069 | ASSERT(zp->zp_copies < SPA_DVAS_PER_BP); | |
3070 | ASSERT(zp->zp_copies == BP_GET_NDVAS(bp) - BP_IS_GANG(bp)); | |
3071 | if (ddp->ddp_phys_birth != 0) | |
3072 | ddt_phys_free(ddt, ddk, ddp, zio->io_txg); | |
3073 | ddt_phys_fill(ddp, bp); | |
3074 | } | |
3075 | ||
3076 | ddt_exit(ddt); | |
3077 | } | |
3078 | ||
3079 | static int | |
3080 | zio_ddt_write(zio_t *zio) | |
3081 | { | |
3082 | spa_t *spa = zio->io_spa; | |
3083 | blkptr_t *bp = zio->io_bp; | |
3084 | uint64_t txg = zio->io_txg; | |
3085 | zio_prop_t *zp = &zio->io_prop; | |
3086 | int p = zp->zp_copies; | |
3087 | int ditto_copies; | |
3088 | zio_t *cio = NULL; | |
3089 | zio_t *dio = NULL; | |
3090 | ddt_t *ddt = ddt_select(spa, bp); | |
3091 | ddt_entry_t *dde; | |
3092 | ddt_phys_t *ddp; | |
3093 | ||
3094 | ASSERT(BP_GET_DEDUP(bp)); | |
3095 | ASSERT(BP_GET_CHECKSUM(bp) == zp->zp_checksum); | |
3096 | ASSERT(BP_IS_HOLE(bp) || zio->io_bp_override); | |
c17bcf83 | 3097 | ASSERT(!(zio->io_bp_override && (zio->io_flags & ZIO_FLAG_RAW))); |
428870ff BB |
3098 | |
3099 | ddt_enter(ddt); | |
3100 | dde = ddt_lookup(ddt, bp, B_TRUE); | |
3101 | ddp = &dde->dde_phys[p]; | |
3102 | ||
3103 | if (zp->zp_dedup_verify && zio_ddt_collision(zio, ddt, dde)) { | |
3104 | /* | |
3105 | * If we're using a weak checksum, upgrade to a strong checksum | |
3106 | * and try again. If we're already using a strong checksum, | |
3107 | * we can't resolve it, so just convert to an ordinary write. | |
3108 | * (And automatically e-mail a paper to Nature?) | |
3109 | */ | |
3c67d83a TH |
3110 | if (!(zio_checksum_table[zp->zp_checksum].ci_flags & |
3111 | ZCHECKSUM_FLAG_DEDUP)) { | |
428870ff BB |
3112 | zp->zp_checksum = spa_dedup_checksum(spa); |
3113 | zio_pop_transforms(zio); | |
3114 | zio->io_stage = ZIO_STAGE_OPEN; | |
3115 | BP_ZERO(bp); | |
3116 | } else { | |
03c6040b | 3117 | zp->zp_dedup = B_FALSE; |
428870ff BB |
3118 | } |
3119 | zio->io_pipeline = ZIO_WRITE_PIPELINE; | |
3120 | ddt_exit(ddt); | |
3121 | return (ZIO_PIPELINE_CONTINUE); | |
3122 | } | |
3123 | ||
3124 | ditto_copies = ddt_ditto_copies_needed(ddt, dde, ddp); | |
3125 | ASSERT(ditto_copies < SPA_DVAS_PER_BP); | |
3126 | ||
3127 | if (ditto_copies > ddt_ditto_copies_present(dde) && | |
3128 | dde->dde_lead_zio[DDT_PHYS_DITTO] == NULL) { | |
3129 | zio_prop_t czp = *zp; | |
3130 | ||
3131 | czp.zp_copies = ditto_copies; | |
3132 | ||
3133 | /* | |
3134 | * If we arrived here with an override bp, we won't have run | |
3135 | * the transform stack, so we won't have the data we need to | |
3136 | * generate a child i/o. So, toss the override bp and restart. | |
3137 | * This is safe, because using the override bp is just an | |
3138 | * optimization; and it's rare, so the cost doesn't matter. | |
3139 | */ | |
3140 | if (zio->io_bp_override) { | |
3141 | zio_pop_transforms(zio); | |
3142 | zio->io_stage = ZIO_STAGE_OPEN; | |
3143 | zio->io_pipeline = ZIO_WRITE_PIPELINE; | |
3144 | zio->io_bp_override = NULL; | |
3145 | BP_ZERO(bp); | |
3146 | ddt_exit(ddt); | |
3147 | return (ZIO_PIPELINE_CONTINUE); | |
3148 | } | |
3149 | ||
a6255b7f | 3150 | dio = zio_write(zio, spa, txg, bp, zio->io_orig_abd, |
2aa34383 | 3151 | zio->io_orig_size, zio->io_orig_size, &czp, NULL, NULL, |
bc77ba73 | 3152 | NULL, zio_ddt_ditto_write_done, dde, zio->io_priority, |
428870ff BB |
3153 | ZIO_DDT_CHILD_FLAGS(zio), &zio->io_bookmark); |
3154 | ||
a6255b7f | 3155 | zio_push_transform(dio, zio->io_abd, zio->io_size, 0, NULL); |
428870ff BB |
3156 | dde->dde_lead_zio[DDT_PHYS_DITTO] = dio; |
3157 | } | |
3158 | ||
3159 | if (ddp->ddp_phys_birth != 0 || dde->dde_lead_zio[p] != NULL) { | |
3160 | if (ddp->ddp_phys_birth != 0) | |
3161 | ddt_bp_fill(ddp, bp, txg); | |
3162 | if (dde->dde_lead_zio[p] != NULL) | |
3163 | zio_add_child(zio, dde->dde_lead_zio[p]); | |
3164 | else | |
3165 | ddt_phys_addref(ddp); | |
3166 | } else if (zio->io_bp_override) { | |
3167 | ASSERT(bp->blk_birth == txg); | |
3168 | ASSERT(BP_EQUAL(bp, zio->io_bp_override)); | |
3169 | ddt_phys_fill(ddp, bp); | |
3170 | ddt_phys_addref(ddp); | |
3171 | } else { | |
a6255b7f | 3172 | cio = zio_write(zio, spa, txg, bp, zio->io_orig_abd, |
2aa34383 | 3173 | zio->io_orig_size, zio->io_orig_size, zp, |
bc77ba73 | 3174 | zio_ddt_child_write_ready, NULL, NULL, |
428870ff BB |
3175 | zio_ddt_child_write_done, dde, zio->io_priority, |
3176 | ZIO_DDT_CHILD_FLAGS(zio), &zio->io_bookmark); | |
3177 | ||
a6255b7f | 3178 | zio_push_transform(cio, zio->io_abd, zio->io_size, 0, NULL); |
428870ff BB |
3179 | dde->dde_lead_zio[p] = cio; |
3180 | } | |
3181 | ||
3182 | ddt_exit(ddt); | |
3183 | ||
3184 | if (cio) | |
3185 | zio_nowait(cio); | |
3186 | if (dio) | |
3187 | zio_nowait(dio); | |
3188 | ||
3189 | return (ZIO_PIPELINE_CONTINUE); | |
3190 | } | |
3191 | ||
3192 | ddt_entry_t *freedde; /* for debugging */ | |
b128c09f | 3193 | |
428870ff BB |
3194 | static int |
3195 | zio_ddt_free(zio_t *zio) | |
3196 | { | |
3197 | spa_t *spa = zio->io_spa; | |
3198 | blkptr_t *bp = zio->io_bp; | |
3199 | ddt_t *ddt = ddt_select(spa, bp); | |
3200 | ddt_entry_t *dde; | |
3201 | ddt_phys_t *ddp; | |
3202 | ||
3203 | ASSERT(BP_GET_DEDUP(bp)); | |
3204 | ASSERT(zio->io_child_type == ZIO_CHILD_LOGICAL); | |
3205 | ||
3206 | ddt_enter(ddt); | |
3207 | freedde = dde = ddt_lookup(ddt, bp, B_TRUE); | |
5dc6af0e BB |
3208 | if (dde) { |
3209 | ddp = ddt_phys_select(dde, bp); | |
3210 | if (ddp) | |
3211 | ddt_phys_decref(ddp); | |
3212 | } | |
428870ff BB |
3213 | ddt_exit(ddt); |
3214 | ||
3215 | return (ZIO_PIPELINE_CONTINUE); | |
3216 | } | |
3217 | ||
3218 | /* | |
3219 | * ========================================================================== | |
3220 | * Allocate and free blocks | |
3221 | * ========================================================================== | |
3222 | */ | |
3dfb57a3 DB |
3223 | |
3224 | static zio_t * | |
3225 | zio_io_to_allocate(spa_t *spa) | |
3226 | { | |
3227 | zio_t *zio; | |
3228 | ||
3229 | ASSERT(MUTEX_HELD(&spa->spa_alloc_lock)); | |
3230 | ||
3231 | zio = avl_first(&spa->spa_alloc_tree); | |
3232 | if (zio == NULL) | |
3233 | return (NULL); | |
3234 | ||
3235 | ASSERT(IO_IS_ALLOCATING(zio)); | |
3236 | ||
3237 | /* | |
3238 | * Try to place a reservation for this zio. If we're unable to | |
3239 | * reserve then we throttle. | |
3240 | */ | |
3241 | if (!metaslab_class_throttle_reserve(spa_normal_class(spa), | |
3242 | zio->io_prop.zp_copies, zio, 0)) { | |
3243 | return (NULL); | |
3244 | } | |
3245 | ||
3246 | avl_remove(&spa->spa_alloc_tree, zio); | |
3247 | ASSERT3U(zio->io_stage, <, ZIO_STAGE_DVA_ALLOCATE); | |
3248 | ||
3249 | return (zio); | |
3250 | } | |
3251 | ||
3252 | static int | |
3253 | zio_dva_throttle(zio_t *zio) | |
3254 | { | |
3255 | spa_t *spa = zio->io_spa; | |
3256 | zio_t *nio; | |
3257 | ||
3258 | if (zio->io_priority == ZIO_PRIORITY_SYNC_WRITE || | |
3259 | !spa_normal_class(zio->io_spa)->mc_alloc_throttle_enabled || | |
3260 | zio->io_child_type == ZIO_CHILD_GANG || | |
3261 | zio->io_flags & ZIO_FLAG_NODATA) { | |
3262 | return (ZIO_PIPELINE_CONTINUE); | |
3263 | } | |
3264 | ||
3265 | ASSERT(zio->io_child_type > ZIO_CHILD_GANG); | |
3266 | ||
3267 | ASSERT3U(zio->io_queued_timestamp, >, 0); | |
3268 | ASSERT(zio->io_stage == ZIO_STAGE_DVA_THROTTLE); | |
3269 | ||
3270 | mutex_enter(&spa->spa_alloc_lock); | |
3271 | ||
3272 | ASSERT(zio->io_type == ZIO_TYPE_WRITE); | |
3273 | avl_add(&spa->spa_alloc_tree, zio); | |
3274 | ||
3275 | nio = zio_io_to_allocate(zio->io_spa); | |
3276 | mutex_exit(&spa->spa_alloc_lock); | |
3277 | ||
3278 | if (nio == zio) | |
3279 | return (ZIO_PIPELINE_CONTINUE); | |
3280 | ||
3281 | if (nio != NULL) { | |
3dfb57a3 DB |
3282 | ASSERT(nio->io_stage == ZIO_STAGE_DVA_THROTTLE); |
3283 | /* | |
3284 | * We are passing control to a new zio so make sure that | |
3285 | * it is processed by a different thread. We do this to | |
3286 | * avoid stack overflows that can occur when parents are | |
3287 | * throttled and children are making progress. We allow | |
3288 | * it to go to the head of the taskq since it's already | |
3289 | * been waiting. | |
3290 | */ | |
3291 | zio_taskq_dispatch(nio, ZIO_TASKQ_ISSUE, B_TRUE); | |
3292 | } | |
3293 | return (ZIO_PIPELINE_STOP); | |
3294 | } | |
3295 | ||
3296 | void | |
3297 | zio_allocate_dispatch(spa_t *spa) | |
3298 | { | |
3299 | zio_t *zio; | |
3300 | ||
3301 | mutex_enter(&spa->spa_alloc_lock); | |
3302 | zio = zio_io_to_allocate(spa); | |
3303 | mutex_exit(&spa->spa_alloc_lock); | |
3304 | if (zio == NULL) | |
3305 | return; | |
3306 | ||
3307 | ASSERT3U(zio->io_stage, ==, ZIO_STAGE_DVA_THROTTLE); | |
3308 | ASSERT0(zio->io_error); | |
3309 | zio_taskq_dispatch(zio, ZIO_TASKQ_ISSUE, B_TRUE); | |
3310 | } | |
3311 | ||
34dc7c2f BB |
3312 | static int |
3313 | zio_dva_allocate(zio_t *zio) | |
3314 | { | |
3315 | spa_t *spa = zio->io_spa; | |
428870ff | 3316 | metaslab_class_t *mc = spa_normal_class(spa); |
34dc7c2f BB |
3317 | blkptr_t *bp = zio->io_bp; |
3318 | int error; | |
6d974228 | 3319 | int flags = 0; |
34dc7c2f | 3320 | |
9babb374 BB |
3321 | if (zio->io_gang_leader == NULL) { |
3322 | ASSERT(zio->io_child_type > ZIO_CHILD_GANG); | |
3323 | zio->io_gang_leader = zio; | |
3324 | } | |
3325 | ||
34dc7c2f | 3326 | ASSERT(BP_IS_HOLE(bp)); |
c99c9001 | 3327 | ASSERT0(BP_GET_NDVAS(bp)); |
428870ff BB |
3328 | ASSERT3U(zio->io_prop.zp_copies, >, 0); |
3329 | ASSERT3U(zio->io_prop.zp_copies, <=, spa_max_replication(spa)); | |
34dc7c2f BB |
3330 | ASSERT3U(zio->io_size, ==, BP_GET_PSIZE(bp)); |
3331 | ||
920dd524 | 3332 | flags |= (zio->io_flags & ZIO_FLAG_FASTWRITE) ? METASLAB_FASTWRITE : 0; |
3dfb57a3 DB |
3333 | if (zio->io_flags & ZIO_FLAG_NODATA) |
3334 | flags |= METASLAB_DONT_THROTTLE; | |
3335 | if (zio->io_flags & ZIO_FLAG_GANG_CHILD) | |
3336 | flags |= METASLAB_GANG_CHILD; | |
3337 | if (zio->io_priority == ZIO_PRIORITY_ASYNC_WRITE) | |
3338 | flags |= METASLAB_ASYNC_ALLOC; | |
3339 | ||
b128c09f | 3340 | error = metaslab_alloc(spa, mc, zio->io_size, bp, |
4e21fd06 DB |
3341 | zio->io_prop.zp_copies, zio->io_txg, NULL, flags, |
3342 | &zio->io_alloc_list, zio); | |
34dc7c2f | 3343 | |
3dfb57a3 | 3344 | if (error != 0) { |
964c2d69 | 3345 | zfs_dbgmsg("%s: metaslab allocation failure: zio %p, " |
6d974228 GW |
3346 | "size %llu, error %d", spa_name(spa), zio, zio->io_size, |
3347 | error); | |
b128c09f BB |
3348 | if (error == ENOSPC && zio->io_size > SPA_MINBLOCKSIZE) |
3349 | return (zio_write_gang_block(zio)); | |
34dc7c2f BB |
3350 | zio->io_error = error; |
3351 | } | |
3352 | ||
3353 | return (ZIO_PIPELINE_CONTINUE); | |
3354 | } | |
3355 | ||
3356 | static int | |
3357 | zio_dva_free(zio_t *zio) | |
3358 | { | |
b128c09f | 3359 | metaslab_free(zio->io_spa, zio->io_bp, zio->io_txg, B_FALSE); |
34dc7c2f BB |
3360 | |
3361 | return (ZIO_PIPELINE_CONTINUE); | |
3362 | } | |
3363 | ||
3364 | static int | |
3365 | zio_dva_claim(zio_t *zio) | |
3366 | { | |
b128c09f BB |
3367 | int error; |
3368 | ||
3369 | error = metaslab_claim(zio->io_spa, zio->io_bp, zio->io_txg); | |
3370 | if (error) | |
3371 | zio->io_error = error; | |
34dc7c2f BB |
3372 | |
3373 | return (ZIO_PIPELINE_CONTINUE); | |
3374 | } | |
3375 | ||
b128c09f BB |
3376 | /* |
3377 | * Undo an allocation. This is used by zio_done() when an I/O fails | |
3378 | * and we want to give back the block we just allocated. | |
3379 | * This handles both normal blocks and gang blocks. | |
3380 | */ | |
3381 | static void | |
3382 | zio_dva_unallocate(zio_t *zio, zio_gang_node_t *gn, blkptr_t *bp) | |
3383 | { | |
b128c09f | 3384 | ASSERT(bp->blk_birth == zio->io_txg || BP_IS_HOLE(bp)); |
428870ff | 3385 | ASSERT(zio->io_bp_override == NULL); |
b128c09f BB |
3386 | |
3387 | if (!BP_IS_HOLE(bp)) | |
428870ff | 3388 | metaslab_free(zio->io_spa, bp, bp->blk_birth, B_TRUE); |
b128c09f BB |
3389 | |
3390 | if (gn != NULL) { | |
1c27024e | 3391 | for (int g = 0; g < SPA_GBH_NBLKPTRS; g++) { |
b128c09f BB |
3392 | zio_dva_unallocate(zio, gn->gn_child[g], |
3393 | &gn->gn_gbh->zg_blkptr[g]); | |
3394 | } | |
3395 | } | |
3396 | } | |
3397 | ||
3398 | /* | |
3399 | * Try to allocate an intent log block. Return 0 on success, errno on failure. | |
3400 | */ | |
3401 | int | |
b5256303 TC |
3402 | zio_alloc_zil(spa_t *spa, objset_t *os, uint64_t txg, blkptr_t *new_bp, |
3403 | uint64_t size, boolean_t *slog) | |
b128c09f | 3404 | { |
428870ff | 3405 | int error = 1; |
4e21fd06 | 3406 | zio_alloc_list_t io_alloc_list; |
b128c09f | 3407 | |
428870ff BB |
3408 | ASSERT(txg > spa_syncing_txg(spa)); |
3409 | ||
4e21fd06 | 3410 | metaslab_trace_init(&io_alloc_list); |
1b7c1e5c GDN |
3411 | error = metaslab_alloc(spa, spa_log_class(spa), size, new_bp, 1, |
3412 | txg, NULL, METASLAB_FASTWRITE, &io_alloc_list, NULL); | |
3413 | if (error == 0) { | |
3414 | *slog = TRUE; | |
3415 | } else { | |
428870ff | 3416 | error = metaslab_alloc(spa, spa_normal_class(spa), size, |
4e21fd06 DB |
3417 | new_bp, 1, txg, NULL, METASLAB_FASTWRITE, |
3418 | &io_alloc_list, NULL); | |
1b7c1e5c GDN |
3419 | if (error == 0) |
3420 | *slog = FALSE; | |
ebf8e3a2 | 3421 | } |
4e21fd06 | 3422 | metaslab_trace_fini(&io_alloc_list); |
b128c09f BB |
3423 | |
3424 | if (error == 0) { | |
3425 | BP_SET_LSIZE(new_bp, size); | |
3426 | BP_SET_PSIZE(new_bp, size); | |
3427 | BP_SET_COMPRESS(new_bp, ZIO_COMPRESS_OFF); | |
428870ff BB |
3428 | BP_SET_CHECKSUM(new_bp, |
3429 | spa_version(spa) >= SPA_VERSION_SLIM_ZIL | |
3430 | ? ZIO_CHECKSUM_ZILOG2 : ZIO_CHECKSUM_ZILOG); | |
b128c09f BB |
3431 | BP_SET_TYPE(new_bp, DMU_OT_INTENT_LOG); |
3432 | BP_SET_LEVEL(new_bp, 0); | |
428870ff | 3433 | BP_SET_DEDUP(new_bp, 0); |
b128c09f | 3434 | BP_SET_BYTEORDER(new_bp, ZFS_HOST_BYTEORDER); |
b5256303 TC |
3435 | |
3436 | /* | |
3437 | * encrypted blocks will require an IV and salt. We generate | |
3438 | * these now since we will not be rewriting the bp at | |
3439 | * rewrite time. | |
3440 | */ | |
3441 | if (os->os_encrypted) { | |
3442 | uint8_t iv[ZIO_DATA_IV_LEN]; | |
3443 | uint8_t salt[ZIO_DATA_SALT_LEN]; | |
3444 | ||
3445 | BP_SET_CRYPT(new_bp, B_TRUE); | |
3446 | VERIFY0(spa_crypt_get_salt(spa, | |
3447 | dmu_objset_id(os), salt)); | |
3448 | VERIFY0(zio_crypt_generate_iv(iv)); | |
3449 | ||
3450 | zio_crypt_encode_params_bp(new_bp, salt, iv); | |
3451 | } | |
1ce23dca PS |
3452 | } else { |
3453 | zfs_dbgmsg("%s: zil block allocation failure: " | |
3454 | "size %llu, error %d", spa_name(spa), size, error); | |
b128c09f BB |
3455 | } |
3456 | ||
3457 | return (error); | |
3458 | } | |
3459 | ||
3460 | /* | |
428870ff | 3461 | * Free an intent log block. |
b128c09f BB |
3462 | */ |
3463 | void | |
428870ff | 3464 | zio_free_zil(spa_t *spa, uint64_t txg, blkptr_t *bp) |
b128c09f | 3465 | { |
428870ff | 3466 | ASSERT(BP_GET_TYPE(bp) == DMU_OT_INTENT_LOG); |
b128c09f BB |
3467 | ASSERT(!BP_IS_GANG(bp)); |
3468 | ||
428870ff | 3469 | zio_free(spa, txg, bp); |
b128c09f BB |
3470 | } |
3471 | ||
34dc7c2f BB |
3472 | /* |
3473 | * ========================================================================== | |
3474 | * Read and write to physical devices | |
3475 | * ========================================================================== | |
3476 | */ | |
98b25418 GW |
3477 | |
3478 | ||
3479 | /* | |
3480 | * Issue an I/O to the underlying vdev. Typically the issue pipeline | |
3481 | * stops after this stage and will resume upon I/O completion. | |
3482 | * However, there are instances where the vdev layer may need to | |
3483 | * continue the pipeline when an I/O was not issued. Since the I/O | |
3484 | * that was sent to the vdev layer might be different than the one | |
3485 | * currently active in the pipeline (see vdev_queue_io()), we explicitly | |
3486 | * force the underlying vdev layers to call either zio_execute() or | |
3487 | * zio_interrupt() to ensure that the pipeline continues with the correct I/O. | |
3488 | */ | |
34dc7c2f BB |
3489 | static int |
3490 | zio_vdev_io_start(zio_t *zio) | |
3491 | { | |
3492 | vdev_t *vd = zio->io_vd; | |
34dc7c2f BB |
3493 | uint64_t align; |
3494 | spa_t *spa = zio->io_spa; | |
3495 | ||
193a37cb TH |
3496 | zio->io_delay = 0; |
3497 | ||
b128c09f BB |
3498 | ASSERT(zio->io_error == 0); |
3499 | ASSERT(zio->io_child_error[ZIO_CHILD_VDEV] == 0); | |
34dc7c2f | 3500 | |
b128c09f BB |
3501 | if (vd == NULL) { |
3502 | if (!(zio->io_flags & ZIO_FLAG_CONFIG_WRITER)) | |
3503 | spa_config_enter(spa, SCL_ZIO, zio, RW_READER); | |
34dc7c2f | 3504 | |
b128c09f BB |
3505 | /* |
3506 | * The mirror_ops handle multiple DVAs in a single BP. | |
3507 | */ | |
98b25418 GW |
3508 | vdev_mirror_ops.vdev_op_io_start(zio); |
3509 | return (ZIO_PIPELINE_STOP); | |
34dc7c2f BB |
3510 | } |
3511 | ||
3dfb57a3 | 3512 | ASSERT3P(zio->io_logical, !=, zio); |
6cb8e530 PZ |
3513 | if (zio->io_type == ZIO_TYPE_WRITE) { |
3514 | ASSERT(spa->spa_trust_config); | |
3515 | ||
a1d477c2 MA |
3516 | /* |
3517 | * Note: the code can handle other kinds of writes, | |
3518 | * but we don't expect them. | |
3519 | */ | |
6cb8e530 PZ |
3520 | if (zio->io_vd->vdev_removing) { |
3521 | ASSERT(zio->io_flags & | |
3522 | (ZIO_FLAG_PHYSICAL | ZIO_FLAG_SELF_HEAL | | |
3523 | ZIO_FLAG_RESILVER | ZIO_FLAG_INDUCE_DAMAGE)); | |
3524 | } | |
a1d477c2 | 3525 | } |
3dfb57a3 | 3526 | |
b128c09f BB |
3527 | align = 1ULL << vd->vdev_top->vdev_ashift; |
3528 | ||
b02fe35d AR |
3529 | if (!(zio->io_flags & ZIO_FLAG_PHYSICAL) && |
3530 | P2PHASE(zio->io_size, align) != 0) { | |
3531 | /* Transform logical writes to be a full physical block size. */ | |
34dc7c2f | 3532 | uint64_t asize = P2ROUNDUP(zio->io_size, align); |
a6255b7f | 3533 | abd_t *abuf = abd_alloc_sametype(zio->io_abd, asize); |
178e73b3 | 3534 | ASSERT(vd == vd->vdev_top); |
34dc7c2f | 3535 | if (zio->io_type == ZIO_TYPE_WRITE) { |
a6255b7f DQ |
3536 | abd_copy(abuf, zio->io_abd, zio->io_size); |
3537 | abd_zero_off(abuf, zio->io_size, asize - zio->io_size); | |
34dc7c2f | 3538 | } |
b128c09f | 3539 | zio_push_transform(zio, abuf, asize, asize, zio_subblock); |
34dc7c2f BB |
3540 | } |
3541 | ||
b02fe35d AR |
3542 | /* |
3543 | * If this is not a physical io, make sure that it is properly aligned | |
3544 | * before proceeding. | |
3545 | */ | |
3546 | if (!(zio->io_flags & ZIO_FLAG_PHYSICAL)) { | |
3547 | ASSERT0(P2PHASE(zio->io_offset, align)); | |
3548 | ASSERT0(P2PHASE(zio->io_size, align)); | |
3549 | } else { | |
3550 | /* | |
3551 | * For physical writes, we allow 512b aligned writes and assume | |
3552 | * the device will perform a read-modify-write as necessary. | |
3553 | */ | |
3554 | ASSERT0(P2PHASE(zio->io_offset, SPA_MINBLOCKSIZE)); | |
3555 | ASSERT0(P2PHASE(zio->io_size, SPA_MINBLOCKSIZE)); | |
3556 | } | |
3557 | ||
572e2857 | 3558 | VERIFY(zio->io_type != ZIO_TYPE_WRITE || spa_writeable(spa)); |
fb5f0bc8 BB |
3559 | |
3560 | /* | |
3561 | * If this is a repair I/O, and there's no self-healing involved -- | |
3562 | * that is, we're just resilvering what we expect to resilver -- | |
3563 | * then don't do the I/O unless zio's txg is actually in vd's DTL. | |
9e052db4 MA |
3564 | * This prevents spurious resilvering. |
3565 | * | |
3566 | * There are a few ways that we can end up creating these spurious | |
3567 | * resilver i/os: | |
3568 | * | |
3569 | * 1. A resilver i/o will be issued if any DVA in the BP has a | |
3570 | * dirty DTL. The mirror code will issue resilver writes to | |
3571 | * each DVA, including the one(s) that are not on vdevs with dirty | |
3572 | * DTLs. | |
3573 | * | |
3574 | * 2. With nested replication, which happens when we have a | |
3575 | * "replacing" or "spare" vdev that's a child of a mirror or raidz. | |
3576 | * For example, given mirror(replacing(A+B), C), it's likely that | |
3577 | * only A is out of date (it's the new device). In this case, we'll | |
3578 | * read from C, then use the data to resilver A+B -- but we don't | |
3579 | * actually want to resilver B, just A. The top-level mirror has no | |
3580 | * way to know this, so instead we just discard unnecessary repairs | |
3581 | * as we work our way down the vdev tree. | |
3582 | * | |
3583 | * 3. ZTEST also creates mirrors of mirrors, mirrors of raidz, etc. | |
3584 | * The same logic applies to any form of nested replication: ditto | |
3585 | * + mirror, RAID-Z + replacing, etc. | |
3586 | * | |
3587 | * However, indirect vdevs point off to other vdevs which may have | |
3588 | * DTL's, so we never bypass them. The child i/os on concrete vdevs | |
3589 | * will be properly bypassed instead. | |
fb5f0bc8 BB |
3590 | */ |
3591 | if ((zio->io_flags & ZIO_FLAG_IO_REPAIR) && | |
3592 | !(zio->io_flags & ZIO_FLAG_SELF_HEAL) && | |
3593 | zio->io_txg != 0 && /* not a delegated i/o */ | |
9e052db4 | 3594 | vd->vdev_ops != &vdev_indirect_ops && |
fb5f0bc8 BB |
3595 | !vdev_dtl_contains(vd, DTL_PARTIAL, zio->io_txg, 1)) { |
3596 | ASSERT(zio->io_type == ZIO_TYPE_WRITE); | |
fb5f0bc8 BB |
3597 | zio_vdev_io_bypass(zio); |
3598 | return (ZIO_PIPELINE_CONTINUE); | |
3599 | } | |
34dc7c2f | 3600 | |
b128c09f BB |
3601 | if (vd->vdev_ops->vdev_op_leaf && |
3602 | (zio->io_type == ZIO_TYPE_READ || zio->io_type == ZIO_TYPE_WRITE)) { | |
3603 | ||
b0bc7a84 | 3604 | if (zio->io_type == ZIO_TYPE_READ && vdev_cache_read(zio)) |
d164b209 | 3605 | return (ZIO_PIPELINE_CONTINUE); |
b128c09f BB |
3606 | |
3607 | if ((zio = vdev_queue_io(zio)) == NULL) | |
3608 | return (ZIO_PIPELINE_STOP); | |
3609 | ||
3610 | if (!vdev_accessible(vd, zio)) { | |
2e528b49 | 3611 | zio->io_error = SET_ERROR(ENXIO); |
b128c09f BB |
3612 | zio_interrupt(zio); |
3613 | return (ZIO_PIPELINE_STOP); | |
3614 | } | |
67103816 | 3615 | zio->io_delay = gethrtime(); |
b128c09f BB |
3616 | } |
3617 | ||
98b25418 GW |
3618 | vd->vdev_ops->vdev_op_io_start(zio); |
3619 | return (ZIO_PIPELINE_STOP); | |
34dc7c2f BB |
3620 | } |
3621 | ||
3622 | static int | |
3623 | zio_vdev_io_done(zio_t *zio) | |
3624 | { | |
b128c09f BB |
3625 | vdev_t *vd = zio->io_vd; |
3626 | vdev_ops_t *ops = vd ? vd->vdev_ops : &vdev_mirror_ops; | |
3627 | boolean_t unexpected_error = B_FALSE; | |
34dc7c2f | 3628 | |
ddc751d5 | 3629 | if (zio_wait_for_children(zio, ZIO_CHILD_VDEV_BIT, ZIO_WAIT_DONE)) { |
b128c09f | 3630 | return (ZIO_PIPELINE_STOP); |
ddc751d5 | 3631 | } |
34dc7c2f | 3632 | |
b128c09f BB |
3633 | ASSERT(zio->io_type == ZIO_TYPE_READ || zio->io_type == ZIO_TYPE_WRITE); |
3634 | ||
193a37cb TH |
3635 | if (zio->io_delay) |
3636 | zio->io_delay = gethrtime() - zio->io_delay; | |
3637 | ||
b128c09f BB |
3638 | if (vd != NULL && vd->vdev_ops->vdev_op_leaf) { |
3639 | ||
3640 | vdev_queue_io_done(zio); | |
3641 | ||
3642 | if (zio->io_type == ZIO_TYPE_WRITE) | |
3643 | vdev_cache_write(zio); | |
3644 | ||
3645 | if (zio_injection_enabled && zio->io_error == 0) | |
d977122d DB |
3646 | zio->io_error = zio_handle_device_injections(vd, zio, |
3647 | EIO, EILSEQ); | |
b128c09f BB |
3648 | |
3649 | if (zio_injection_enabled && zio->io_error == 0) | |
3650 | zio->io_error = zio_handle_label_injection(zio, EIO); | |
3651 | ||
3652 | if (zio->io_error) { | |
3653 | if (!vdev_accessible(vd, zio)) { | |
2e528b49 | 3654 | zio->io_error = SET_ERROR(ENXIO); |
b128c09f BB |
3655 | } else { |
3656 | unexpected_error = B_TRUE; | |
3657 | } | |
3658 | } | |
3659 | } | |
3660 | ||
3661 | ops->vdev_op_io_done(zio); | |
34dc7c2f | 3662 | |
f43615d0 | 3663 | if (unexpected_error) |
d164b209 | 3664 | VERIFY(vdev_probe(vd, zio) == NULL); |
34dc7c2f | 3665 | |
b128c09f | 3666 | return (ZIO_PIPELINE_CONTINUE); |
34dc7c2f BB |
3667 | } |
3668 | ||
a8b2e306 TC |
3669 | /* |
3670 | * This function is used to change the priority of an existing zio that is | |
3671 | * currently in-flight. This is used by the arc to upgrade priority in the | |
3672 | * event that a demand read is made for a block that is currently queued | |
3673 | * as a scrub or async read IO. Otherwise, the high priority read request | |
3674 | * would end up having to wait for the lower priority IO. | |
3675 | */ | |
3676 | void | |
3677 | zio_change_priority(zio_t *pio, zio_priority_t priority) | |
3678 | { | |
3679 | zio_t *cio, *cio_next; | |
3680 | zio_link_t *zl = NULL; | |
3681 | ||
3682 | ASSERT3U(priority, <, ZIO_PRIORITY_NUM_QUEUEABLE); | |
3683 | ||
3684 | if (pio->io_vd != NULL && pio->io_vd->vdev_ops->vdev_op_leaf) { | |
3685 | vdev_queue_change_io_priority(pio, priority); | |
3686 | } else { | |
3687 | pio->io_priority = priority; | |
3688 | } | |
3689 | ||
3690 | mutex_enter(&pio->io_lock); | |
3691 | for (cio = zio_walk_children(pio, &zl); cio != NULL; cio = cio_next) { | |
3692 | cio_next = zio_walk_children(pio, &zl); | |
3693 | zio_change_priority(cio, priority); | |
3694 | } | |
3695 | mutex_exit(&pio->io_lock); | |
3696 | } | |
3697 | ||
428870ff BB |
3698 | /* |
3699 | * For non-raidz ZIOs, we can just copy aside the bad data read from the | |
3700 | * disk, and use that to finish the checksum ereport later. | |
3701 | */ | |
3702 | static void | |
3703 | zio_vsd_default_cksum_finish(zio_cksum_report_t *zcr, | |
84c07ada | 3704 | const abd_t *good_buf) |
428870ff BB |
3705 | { |
3706 | /* no processing needed */ | |
3707 | zfs_ereport_finish_checksum(zcr, good_buf, zcr->zcr_cbdata, B_FALSE); | |
3708 | } | |
3709 | ||
3710 | /*ARGSUSED*/ | |
3711 | void | |
3712 | zio_vsd_default_cksum_report(zio_t *zio, zio_cksum_report_t *zcr, void *ignored) | |
3713 | { | |
84c07ada | 3714 | void *abd = abd_alloc_sametype(zio->io_abd, zio->io_size); |
428870ff | 3715 | |
84c07ada | 3716 | abd_copy(abd, zio->io_abd, zio->io_size); |
428870ff BB |
3717 | |
3718 | zcr->zcr_cbinfo = zio->io_size; | |
84c07ada | 3719 | zcr->zcr_cbdata = abd; |
428870ff | 3720 | zcr->zcr_finish = zio_vsd_default_cksum_finish; |
84c07ada | 3721 | zcr->zcr_free = zio_abd_free; |
428870ff BB |
3722 | } |
3723 | ||
34dc7c2f BB |
3724 | static int |
3725 | zio_vdev_io_assess(zio_t *zio) | |
3726 | { | |
3727 | vdev_t *vd = zio->io_vd; | |
b128c09f | 3728 | |
ddc751d5 | 3729 | if (zio_wait_for_children(zio, ZIO_CHILD_VDEV_BIT, ZIO_WAIT_DONE)) { |
b128c09f | 3730 | return (ZIO_PIPELINE_STOP); |
ddc751d5 | 3731 | } |
b128c09f BB |
3732 | |
3733 | if (vd == NULL && !(zio->io_flags & ZIO_FLAG_CONFIG_WRITER)) | |
3734 | spa_config_exit(zio->io_spa, SCL_ZIO, zio); | |
3735 | ||
3736 | if (zio->io_vsd != NULL) { | |
428870ff | 3737 | zio->io_vsd_ops->vsd_free(zio); |
b128c09f | 3738 | zio->io_vsd = NULL; |
34dc7c2f BB |
3739 | } |
3740 | ||
b128c09f | 3741 | if (zio_injection_enabled && zio->io_error == 0) |
34dc7c2f BB |
3742 | zio->io_error = zio_handle_fault_injection(zio, EIO); |
3743 | ||
3744 | /* | |
3745 | * If the I/O failed, determine whether we should attempt to retry it. | |
428870ff BB |
3746 | * |
3747 | * On retry, we cut in line in the issue queue, since we don't want | |
3748 | * compression/checksumming/etc. work to prevent our (cheap) IO reissue. | |
34dc7c2f | 3749 | */ |
b128c09f BB |
3750 | if (zio->io_error && vd == NULL && |
3751 | !(zio->io_flags & (ZIO_FLAG_DONT_RETRY | ZIO_FLAG_IO_RETRY))) { | |
3752 | ASSERT(!(zio->io_flags & ZIO_FLAG_DONT_QUEUE)); /* not a leaf */ | |
3753 | ASSERT(!(zio->io_flags & ZIO_FLAG_IO_BYPASS)); /* not a leaf */ | |
34dc7c2f | 3754 | zio->io_error = 0; |
b128c09f BB |
3755 | zio->io_flags |= ZIO_FLAG_IO_RETRY | |
3756 | ZIO_FLAG_DONT_CACHE | ZIO_FLAG_DONT_AGGREGATE; | |
428870ff BB |
3757 | zio->io_stage = ZIO_STAGE_VDEV_IO_START >> 1; |
3758 | zio_taskq_dispatch(zio, ZIO_TASKQ_ISSUE, | |
3759 | zio_requeue_io_start_cut_in_line); | |
b128c09f | 3760 | return (ZIO_PIPELINE_STOP); |
34dc7c2f BB |
3761 | } |
3762 | ||
b128c09f BB |
3763 | /* |
3764 | * If we got an error on a leaf device, convert it to ENXIO | |
3765 | * if the device is not accessible at all. | |
3766 | */ | |
3767 | if (zio->io_error && vd != NULL && vd->vdev_ops->vdev_op_leaf && | |
3768 | !vdev_accessible(vd, zio)) | |
2e528b49 | 3769 | zio->io_error = SET_ERROR(ENXIO); |
b128c09f BB |
3770 | |
3771 | /* | |
3772 | * If we can't write to an interior vdev (mirror or RAID-Z), | |
3773 | * set vdev_cant_write so that we stop trying to allocate from it. | |
3774 | */ | |
3775 | if (zio->io_error == ENXIO && zio->io_type == ZIO_TYPE_WRITE && | |
13fe0198 | 3776 | vd != NULL && !vd->vdev_ops->vdev_op_leaf) { |
b128c09f | 3777 | vd->vdev_cant_write = B_TRUE; |
13fe0198 | 3778 | } |
b128c09f | 3779 | |
298ec40b GM |
3780 | /* |
3781 | * If a cache flush returns ENOTSUP or ENOTTY, we know that no future | |
3782 | * attempts will ever succeed. In this case we set a persistent bit so | |
3783 | * that we don't bother with it in the future. | |
3784 | */ | |
3785 | if ((zio->io_error == ENOTSUP || zio->io_error == ENOTTY) && | |
3786 | zio->io_type == ZIO_TYPE_IOCTL && | |
3787 | zio->io_cmd == DKIOCFLUSHWRITECACHE && vd != NULL) | |
3788 | vd->vdev_nowritecache = B_TRUE; | |
3789 | ||
b128c09f BB |
3790 | if (zio->io_error) |
3791 | zio->io_pipeline = ZIO_INTERLOCK_PIPELINE; | |
3792 | ||
e8b96c60 MA |
3793 | if (vd != NULL && vd->vdev_ops->vdev_op_leaf && |
3794 | zio->io_physdone != NULL) { | |
3795 | ASSERT(!(zio->io_flags & ZIO_FLAG_DELEGATED)); | |
3796 | ASSERT(zio->io_child_type == ZIO_CHILD_VDEV); | |
3797 | zio->io_physdone(zio->io_logical); | |
3798 | } | |
3799 | ||
34dc7c2f BB |
3800 | return (ZIO_PIPELINE_CONTINUE); |
3801 | } | |
3802 | ||
3803 | void | |
3804 | zio_vdev_io_reissue(zio_t *zio) | |
3805 | { | |
3806 | ASSERT(zio->io_stage == ZIO_STAGE_VDEV_IO_START); | |
3807 | ASSERT(zio->io_error == 0); | |
3808 | ||
428870ff | 3809 | zio->io_stage >>= 1; |
34dc7c2f BB |
3810 | } |
3811 | ||
3812 | void | |
3813 | zio_vdev_io_redone(zio_t *zio) | |
3814 | { | |
3815 | ASSERT(zio->io_stage == ZIO_STAGE_VDEV_IO_DONE); | |
3816 | ||
428870ff | 3817 | zio->io_stage >>= 1; |
34dc7c2f BB |
3818 | } |
3819 | ||
3820 | void | |
3821 | zio_vdev_io_bypass(zio_t *zio) | |
3822 | { | |
3823 | ASSERT(zio->io_stage == ZIO_STAGE_VDEV_IO_START); | |
3824 | ASSERT(zio->io_error == 0); | |
3825 | ||
3826 | zio->io_flags |= ZIO_FLAG_IO_BYPASS; | |
428870ff | 3827 | zio->io_stage = ZIO_STAGE_VDEV_IO_ASSESS >> 1; |
34dc7c2f BB |
3828 | } |
3829 | ||
b5256303 TC |
3830 | /* |
3831 | * ========================================================================== | |
3832 | * Encrypt and store encryption parameters | |
3833 | * ========================================================================== | |
3834 | */ | |
3835 | ||
3836 | ||
3837 | /* | |
3838 | * This function is used for ZIO_STAGE_ENCRYPT. It is responsible for | |
3839 | * managing the storage of encryption parameters and passing them to the | |
3840 | * lower-level encryption functions. | |
3841 | */ | |
3842 | static int | |
3843 | zio_encrypt(zio_t *zio) | |
3844 | { | |
3845 | zio_prop_t *zp = &zio->io_prop; | |
3846 | spa_t *spa = zio->io_spa; | |
3847 | blkptr_t *bp = zio->io_bp; | |
3848 | uint64_t psize = BP_GET_PSIZE(bp); | |
ae76f45c | 3849 | uint64_t dsobj = zio->io_bookmark.zb_objset; |
b5256303 TC |
3850 | dmu_object_type_t ot = BP_GET_TYPE(bp); |
3851 | void *enc_buf = NULL; | |
3852 | abd_t *eabd = NULL; | |
3853 | uint8_t salt[ZIO_DATA_SALT_LEN]; | |
3854 | uint8_t iv[ZIO_DATA_IV_LEN]; | |
3855 | uint8_t mac[ZIO_DATA_MAC_LEN]; | |
3856 | boolean_t no_crypt = B_FALSE; | |
3857 | ||
3858 | /* the root zio already encrypted the data */ | |
3859 | if (zio->io_child_type == ZIO_CHILD_GANG) | |
3860 | return (ZIO_PIPELINE_CONTINUE); | |
3861 | ||
3862 | /* only ZIL blocks are re-encrypted on rewrite */ | |
3863 | if (!IO_IS_ALLOCATING(zio) && ot != DMU_OT_INTENT_LOG) | |
3864 | return (ZIO_PIPELINE_CONTINUE); | |
3865 | ||
3866 | if (!(zp->zp_encrypt || BP_IS_ENCRYPTED(bp))) { | |
3867 | BP_SET_CRYPT(bp, B_FALSE); | |
3868 | return (ZIO_PIPELINE_CONTINUE); | |
3869 | } | |
3870 | ||
3871 | /* if we are doing raw encryption set the provided encryption params */ | |
3872 | if (zio->io_flags & ZIO_FLAG_RAW_ENCRYPT) { | |
ae76f45c | 3873 | ASSERT0(BP_GET_LEVEL(bp)); |
b5256303 TC |
3874 | BP_SET_CRYPT(bp, B_TRUE); |
3875 | BP_SET_BYTEORDER(bp, zp->zp_byteorder); | |
3876 | if (ot != DMU_OT_OBJSET) | |
3877 | zio_crypt_encode_mac_bp(bp, zp->zp_mac); | |
ae76f45c TC |
3878 | |
3879 | /* dnode blocks must be written out in the provided byteorder */ | |
3880 | if (zp->zp_byteorder != ZFS_HOST_BYTEORDER && | |
3881 | ot == DMU_OT_DNODE) { | |
3882 | void *bswap_buf = zio_buf_alloc(psize); | |
3883 | abd_t *babd = abd_get_from_buf(bswap_buf, psize); | |
3884 | ||
3885 | ASSERT3U(BP_GET_COMPRESS(bp), ==, ZIO_COMPRESS_OFF); | |
3886 | abd_copy_to_buf(bswap_buf, zio->io_abd, psize); | |
3887 | dmu_ot_byteswap[DMU_OT_BYTESWAP(ot)].ob_func(bswap_buf, | |
3888 | psize); | |
3889 | ||
3890 | abd_take_ownership_of_buf(babd, B_TRUE); | |
3891 | zio_push_transform(zio, babd, psize, psize, NULL); | |
3892 | } | |
3893 | ||
b5256303 TC |
3894 | if (DMU_OT_IS_ENCRYPTED(ot)) |
3895 | zio_crypt_encode_params_bp(bp, zp->zp_salt, zp->zp_iv); | |
3896 | return (ZIO_PIPELINE_CONTINUE); | |
3897 | } | |
3898 | ||
3899 | /* indirect blocks only maintain a cksum of the lower level MACs */ | |
3900 | if (BP_GET_LEVEL(bp) > 0) { | |
3901 | BP_SET_CRYPT(bp, B_TRUE); | |
3902 | VERIFY0(zio_crypt_do_indirect_mac_checksum_abd(B_TRUE, | |
3903 | zio->io_orig_abd, BP_GET_LSIZE(bp), BP_SHOULD_BYTESWAP(bp), | |
3904 | mac)); | |
3905 | zio_crypt_encode_mac_bp(bp, mac); | |
3906 | return (ZIO_PIPELINE_CONTINUE); | |
3907 | } | |
3908 | ||
3909 | /* | |
3910 | * Objset blocks are a special case since they have 2 256-bit MACs | |
3911 | * embedded within them. | |
3912 | */ | |
3913 | if (ot == DMU_OT_OBJSET) { | |
3914 | ASSERT0(DMU_OT_IS_ENCRYPTED(ot)); | |
3915 | ASSERT3U(BP_GET_COMPRESS(bp), ==, ZIO_COMPRESS_OFF); | |
3916 | BP_SET_CRYPT(bp, B_TRUE); | |
ae76f45c TC |
3917 | VERIFY0(spa_do_crypt_objset_mac_abd(B_TRUE, spa, dsobj, |
3918 | zio->io_abd, psize, BP_SHOULD_BYTESWAP(bp))); | |
b5256303 TC |
3919 | return (ZIO_PIPELINE_CONTINUE); |
3920 | } | |
3921 | ||
3922 | /* unencrypted object types are only authenticated with a MAC */ | |
3923 | if (!DMU_OT_IS_ENCRYPTED(ot)) { | |
3924 | BP_SET_CRYPT(bp, B_TRUE); | |
ae76f45c TC |
3925 | VERIFY0(spa_do_crypt_mac_abd(B_TRUE, spa, dsobj, |
3926 | zio->io_abd, psize, mac)); | |
b5256303 TC |
3927 | zio_crypt_encode_mac_bp(bp, mac); |
3928 | return (ZIO_PIPELINE_CONTINUE); | |
3929 | } | |
3930 | ||
3931 | /* | |
3932 | * Later passes of sync-to-convergence may decide to rewrite data | |
3933 | * in place to avoid more disk reallocations. This presents a problem | |
3934 | * for encryption because this consitutes rewriting the new data with | |
3935 | * the same encryption key and IV. However, this only applies to blocks | |
3936 | * in the MOS (particularly the spacemaps) and we do not encrypt the | |
3937 | * MOS. We assert that the zio is allocating or an intent log write | |
3938 | * to enforce this. | |
3939 | */ | |
3940 | ASSERT(IO_IS_ALLOCATING(zio) || ot == DMU_OT_INTENT_LOG); | |
3941 | ASSERT(BP_GET_LEVEL(bp) == 0 || ot == DMU_OT_INTENT_LOG); | |
3942 | ASSERT(spa_feature_is_active(spa, SPA_FEATURE_ENCRYPTION)); | |
3943 | ASSERT3U(psize, !=, 0); | |
3944 | ||
3945 | enc_buf = zio_buf_alloc(psize); | |
3946 | eabd = abd_get_from_buf(enc_buf, psize); | |
3947 | abd_take_ownership_of_buf(eabd, B_TRUE); | |
3948 | ||
3949 | /* | |
3950 | * For an explanation of what encryption parameters are stored | |
3951 | * where, see the block comment in zio_crypt.c. | |
3952 | */ | |
3953 | if (ot == DMU_OT_INTENT_LOG) { | |
3954 | zio_crypt_decode_params_bp(bp, salt, iv); | |
3955 | } else { | |
3956 | BP_SET_CRYPT(bp, B_TRUE); | |
3957 | } | |
3958 | ||
3959 | /* Perform the encryption. This should not fail */ | |
be9a5c35 TC |
3960 | VERIFY0(spa_do_crypt_abd(B_TRUE, spa, &zio->io_bookmark, |
3961 | BP_GET_TYPE(bp), BP_GET_DEDUP(bp), BP_SHOULD_BYTESWAP(bp), | |
3962 | salt, iv, mac, psize, zio->io_abd, eabd, &no_crypt)); | |
b5256303 TC |
3963 | |
3964 | /* encode encryption metadata into the bp */ | |
3965 | if (ot == DMU_OT_INTENT_LOG) { | |
3966 | /* | |
3967 | * ZIL blocks store the MAC in the embedded checksum, so the | |
3968 | * transform must always be applied. | |
3969 | */ | |
3970 | zio_crypt_encode_mac_zil(enc_buf, mac); | |
3971 | zio_push_transform(zio, eabd, psize, psize, NULL); | |
3972 | } else { | |
3973 | BP_SET_CRYPT(bp, B_TRUE); | |
3974 | zio_crypt_encode_params_bp(bp, salt, iv); | |
3975 | zio_crypt_encode_mac_bp(bp, mac); | |
3976 | ||
3977 | if (no_crypt) { | |
3978 | ASSERT3U(ot, ==, DMU_OT_DNODE); | |
3979 | abd_free(eabd); | |
3980 | } else { | |
3981 | zio_push_transform(zio, eabd, psize, psize, NULL); | |
3982 | } | |
3983 | } | |
3984 | ||
3985 | return (ZIO_PIPELINE_CONTINUE); | |
3986 | } | |
3987 | ||
34dc7c2f BB |
3988 | /* |
3989 | * ========================================================================== | |
3990 | * Generate and verify checksums | |
3991 | * ========================================================================== | |
3992 | */ | |
3993 | static int | |
3994 | zio_checksum_generate(zio_t *zio) | |
3995 | { | |
34dc7c2f | 3996 | blkptr_t *bp = zio->io_bp; |
b128c09f | 3997 | enum zio_checksum checksum; |
34dc7c2f | 3998 | |
b128c09f BB |
3999 | if (bp == NULL) { |
4000 | /* | |
4001 | * This is zio_write_phys(). | |
4002 | * We're either generating a label checksum, or none at all. | |
4003 | */ | |
4004 | checksum = zio->io_prop.zp_checksum; | |
34dc7c2f | 4005 | |
b128c09f BB |
4006 | if (checksum == ZIO_CHECKSUM_OFF) |
4007 | return (ZIO_PIPELINE_CONTINUE); | |
4008 | ||
4009 | ASSERT(checksum == ZIO_CHECKSUM_LABEL); | |
4010 | } else { | |
4011 | if (BP_IS_GANG(bp) && zio->io_child_type == ZIO_CHILD_GANG) { | |
4012 | ASSERT(!IO_IS_ALLOCATING(zio)); | |
4013 | checksum = ZIO_CHECKSUM_GANG_HEADER; | |
4014 | } else { | |
4015 | checksum = BP_GET_CHECKSUM(bp); | |
4016 | } | |
4017 | } | |
34dc7c2f | 4018 | |
a6255b7f | 4019 | zio_checksum_compute(zio, checksum, zio->io_abd, zio->io_size); |
34dc7c2f BB |
4020 | |
4021 | return (ZIO_PIPELINE_CONTINUE); | |
4022 | } | |
4023 | ||
4024 | static int | |
b128c09f | 4025 | zio_checksum_verify(zio_t *zio) |
34dc7c2f | 4026 | { |
428870ff | 4027 | zio_bad_cksum_t info; |
b128c09f BB |
4028 | blkptr_t *bp = zio->io_bp; |
4029 | int error; | |
34dc7c2f | 4030 | |
428870ff BB |
4031 | ASSERT(zio->io_vd != NULL); |
4032 | ||
b128c09f BB |
4033 | if (bp == NULL) { |
4034 | /* | |
4035 | * This is zio_read_phys(). | |
4036 | * We're either verifying a label checksum, or nothing at all. | |
4037 | */ | |
4038 | if (zio->io_prop.zp_checksum == ZIO_CHECKSUM_OFF) | |
4039 | return (ZIO_PIPELINE_CONTINUE); | |
34dc7c2f | 4040 | |
b128c09f BB |
4041 | ASSERT(zio->io_prop.zp_checksum == ZIO_CHECKSUM_LABEL); |
4042 | } | |
34dc7c2f | 4043 | |
428870ff | 4044 | if ((error = zio_checksum_error(zio, &info)) != 0) { |
b128c09f | 4045 | zio->io_error = error; |
7a3066ff MA |
4046 | if (error == ECKSUM && |
4047 | !(zio->io_flags & ZIO_FLAG_SPECULATIVE)) { | |
428870ff | 4048 | zfs_ereport_start_checksum(zio->io_spa, |
b5256303 TC |
4049 | zio->io_vd, &zio->io_bookmark, zio, |
4050 | zio->io_offset, zio->io_size, NULL, &info); | |
b128c09f | 4051 | } |
34dc7c2f BB |
4052 | } |
4053 | ||
4054 | return (ZIO_PIPELINE_CONTINUE); | |
4055 | } | |
4056 | ||
4057 | /* | |
4058 | * Called by RAID-Z to ensure we don't compute the checksum twice. | |
4059 | */ | |
4060 | void | |
4061 | zio_checksum_verified(zio_t *zio) | |
4062 | { | |
428870ff | 4063 | zio->io_pipeline &= ~ZIO_STAGE_CHECKSUM_VERIFY; |
34dc7c2f BB |
4064 | } |
4065 | ||
4066 | /* | |
b128c09f BB |
4067 | * ========================================================================== |
4068 | * Error rank. Error are ranked in the order 0, ENXIO, ECKSUM, EIO, other. | |
9b67f605 | 4069 | * An error of 0 indicates success. ENXIO indicates whole-device failure, |
b128c09f BB |
4070 | * which may be transient (e.g. unplugged) or permament. ECKSUM and EIO |
4071 | * indicate errors that are specific to one I/O, and most likely permanent. | |
4072 | * Any other error is presumed to be worse because we weren't expecting it. | |
4073 | * ========================================================================== | |
34dc7c2f | 4074 | */ |
b128c09f BB |
4075 | int |
4076 | zio_worst_error(int e1, int e2) | |
34dc7c2f | 4077 | { |
b128c09f BB |
4078 | static int zio_error_rank[] = { 0, ENXIO, ECKSUM, EIO }; |
4079 | int r1, r2; | |
4080 | ||
4081 | for (r1 = 0; r1 < sizeof (zio_error_rank) / sizeof (int); r1++) | |
4082 | if (e1 == zio_error_rank[r1]) | |
4083 | break; | |
34dc7c2f | 4084 | |
b128c09f BB |
4085 | for (r2 = 0; r2 < sizeof (zio_error_rank) / sizeof (int); r2++) |
4086 | if (e2 == zio_error_rank[r2]) | |
4087 | break; | |
4088 | ||
4089 | return (r1 > r2 ? e1 : e2); | |
34dc7c2f BB |
4090 | } |
4091 | ||
4092 | /* | |
4093 | * ========================================================================== | |
b128c09f | 4094 | * I/O completion |
34dc7c2f BB |
4095 | * ========================================================================== |
4096 | */ | |
b128c09f BB |
4097 | static int |
4098 | zio_ready(zio_t *zio) | |
34dc7c2f | 4099 | { |
b128c09f | 4100 | blkptr_t *bp = zio->io_bp; |
d164b209 | 4101 | zio_t *pio, *pio_next; |
3dfb57a3 | 4102 | zio_link_t *zl = NULL; |
34dc7c2f | 4103 | |
ddc751d5 GW |
4104 | if (zio_wait_for_children(zio, ZIO_CHILD_GANG_BIT | ZIO_CHILD_DDT_BIT, |
4105 | ZIO_WAIT_READY)) { | |
9babb374 | 4106 | return (ZIO_PIPELINE_STOP); |
ddc751d5 | 4107 | } |
34dc7c2f | 4108 | |
9babb374 | 4109 | if (zio->io_ready) { |
b128c09f | 4110 | ASSERT(IO_IS_ALLOCATING(zio)); |
03c6040b GW |
4111 | ASSERT(bp->blk_birth == zio->io_txg || BP_IS_HOLE(bp) || |
4112 | (zio->io_flags & ZIO_FLAG_NOPWRITE)); | |
b128c09f | 4113 | ASSERT(zio->io_children[ZIO_CHILD_GANG][ZIO_WAIT_READY] == 0); |
34dc7c2f | 4114 | |
b128c09f BB |
4115 | zio->io_ready(zio); |
4116 | } | |
34dc7c2f | 4117 | |
b128c09f BB |
4118 | if (bp != NULL && bp != &zio->io_bp_copy) |
4119 | zio->io_bp_copy = *bp; | |
34dc7c2f | 4120 | |
3dfb57a3 | 4121 | if (zio->io_error != 0) { |
b128c09f | 4122 | zio->io_pipeline = ZIO_INTERLOCK_PIPELINE; |
34dc7c2f | 4123 | |
3dfb57a3 DB |
4124 | if (zio->io_flags & ZIO_FLAG_IO_ALLOCATING) { |
4125 | ASSERT(IO_IS_ALLOCATING(zio)); | |
4126 | ASSERT(zio->io_priority == ZIO_PRIORITY_ASYNC_WRITE); | |
4127 | /* | |
4128 | * We were unable to allocate anything, unreserve and | |
4129 | * issue the next I/O to allocate. | |
4130 | */ | |
4131 | metaslab_class_throttle_unreserve( | |
4132 | spa_normal_class(zio->io_spa), | |
4133 | zio->io_prop.zp_copies, zio); | |
4134 | zio_allocate_dispatch(zio->io_spa); | |
4135 | } | |
4136 | } | |
4137 | ||
d164b209 BB |
4138 | mutex_enter(&zio->io_lock); |
4139 | zio->io_state[ZIO_WAIT_READY] = 1; | |
3dfb57a3 | 4140 | pio = zio_walk_parents(zio, &zl); |
d164b209 BB |
4141 | mutex_exit(&zio->io_lock); |
4142 | ||
4143 | /* | |
4144 | * As we notify zio's parents, new parents could be added. | |
4145 | * New parents go to the head of zio's io_parent_list, however, | |
4146 | * so we will (correctly) not notify them. The remainder of zio's | |
4147 | * io_parent_list, from 'pio_next' onward, cannot change because | |
4148 | * all parents must wait for us to be done before they can be done. | |
4149 | */ | |
4150 | for (; pio != NULL; pio = pio_next) { | |
3dfb57a3 | 4151 | pio_next = zio_walk_parents(zio, &zl); |
b128c09f | 4152 | zio_notify_parent(pio, zio, ZIO_WAIT_READY); |
d164b209 | 4153 | } |
34dc7c2f | 4154 | |
428870ff BB |
4155 | if (zio->io_flags & ZIO_FLAG_NODATA) { |
4156 | if (BP_IS_GANG(bp)) { | |
4157 | zio->io_flags &= ~ZIO_FLAG_NODATA; | |
4158 | } else { | |
a6255b7f | 4159 | ASSERT((uintptr_t)zio->io_abd < SPA_MAXBLOCKSIZE); |
428870ff BB |
4160 | zio->io_pipeline &= ~ZIO_VDEV_IO_STAGES; |
4161 | } | |
4162 | } | |
4163 | ||
4164 | if (zio_injection_enabled && | |
4165 | zio->io_spa->spa_syncing_txg == zio->io_txg) | |
4166 | zio_handle_ignored_writes(zio); | |
4167 | ||
b128c09f | 4168 | return (ZIO_PIPELINE_CONTINUE); |
34dc7c2f BB |
4169 | } |
4170 | ||
3dfb57a3 DB |
4171 | /* |
4172 | * Update the allocation throttle accounting. | |
4173 | */ | |
4174 | static void | |
4175 | zio_dva_throttle_done(zio_t *zio) | |
4176 | { | |
1c27024e | 4177 | ASSERTV(zio_t *lio = zio->io_logical); |
3dfb57a3 DB |
4178 | zio_t *pio = zio_unique_parent(zio); |
4179 | vdev_t *vd = zio->io_vd; | |
4180 | int flags = METASLAB_ASYNC_ALLOC; | |
4181 | ||
4182 | ASSERT3P(zio->io_bp, !=, NULL); | |
4183 | ASSERT3U(zio->io_type, ==, ZIO_TYPE_WRITE); | |
4184 | ASSERT3U(zio->io_priority, ==, ZIO_PRIORITY_ASYNC_WRITE); | |
4185 | ASSERT3U(zio->io_child_type, ==, ZIO_CHILD_VDEV); | |
4186 | ASSERT(vd != NULL); | |
4187 | ASSERT3P(vd, ==, vd->vdev_top); | |
21df134f SB |
4188 | ASSERT(zio_injection_enabled || !(zio->io_flags & ZIO_FLAG_IO_RETRY)); |
4189 | ASSERT(!(zio->io_flags & ZIO_FLAG_IO_REPAIR)); | |
3dfb57a3 DB |
4190 | ASSERT(zio->io_flags & ZIO_FLAG_IO_ALLOCATING); |
4191 | ASSERT(!(lio->io_flags & ZIO_FLAG_IO_REWRITE)); | |
4192 | ASSERT(!(lio->io_orig_flags & ZIO_FLAG_NODATA)); | |
4193 | ||
4194 | /* | |
4195 | * Parents of gang children can have two flavors -- ones that | |
4196 | * allocated the gang header (will have ZIO_FLAG_IO_REWRITE set) | |
4197 | * and ones that allocated the constituent blocks. The allocation | |
4198 | * throttle needs to know the allocating parent zio so we must find | |
4199 | * it here. | |
4200 | */ | |
4201 | if (pio->io_child_type == ZIO_CHILD_GANG) { | |
4202 | /* | |
4203 | * If our parent is a rewrite gang child then our grandparent | |
4204 | * would have been the one that performed the allocation. | |
4205 | */ | |
4206 | if (pio->io_flags & ZIO_FLAG_IO_REWRITE) | |
4207 | pio = zio_unique_parent(pio); | |
4208 | flags |= METASLAB_GANG_CHILD; | |
4209 | } | |
4210 | ||
4211 | ASSERT(IO_IS_ALLOCATING(pio)); | |
4212 | ASSERT3P(zio, !=, zio->io_logical); | |
4213 | ASSERT(zio->io_logical != NULL); | |
4214 | ASSERT(!(zio->io_flags & ZIO_FLAG_IO_REPAIR)); | |
4215 | ASSERT0(zio->io_flags & ZIO_FLAG_NOPWRITE); | |
4216 | ||
4217 | mutex_enter(&pio->io_lock); | |
4218 | metaslab_group_alloc_decrement(zio->io_spa, vd->vdev_id, pio, flags); | |
4219 | mutex_exit(&pio->io_lock); | |
4220 | ||
4221 | metaslab_class_throttle_unreserve(spa_normal_class(zio->io_spa), | |
4222 | 1, pio); | |
4223 | ||
4224 | /* | |
4225 | * Call into the pipeline to see if there is more work that | |
4226 | * needs to be done. If there is work to be done it will be | |
4227 | * dispatched to another taskq thread. | |
4228 | */ | |
4229 | zio_allocate_dispatch(zio->io_spa); | |
4230 | } | |
4231 | ||
b128c09f BB |
4232 | static int |
4233 | zio_done(zio_t *zio) | |
34dc7c2f | 4234 | { |
3dfb57a3 DB |
4235 | /* |
4236 | * Always attempt to keep stack usage minimal here since | |
4237 | * we can be called recurisvely up to 19 levels deep. | |
4238 | */ | |
84c07ada | 4239 | const uint64_t psize = zio->io_size; |
d164b209 | 4240 | zio_t *pio, *pio_next; |
3dfb57a3 | 4241 | zio_link_t *zl = NULL; |
34dc7c2f | 4242 | |
b128c09f | 4243 | /* |
9babb374 | 4244 | * If our children haven't all completed, |
b128c09f BB |
4245 | * wait for them and then repeat this pipeline stage. |
4246 | */ | |
ddc751d5 | 4247 | if (zio_wait_for_children(zio, ZIO_CHILD_ALL_BITS, ZIO_WAIT_DONE)) { |
b128c09f | 4248 | return (ZIO_PIPELINE_STOP); |
ddc751d5 | 4249 | } |
34dc7c2f | 4250 | |
3dfb57a3 DB |
4251 | /* |
4252 | * If the allocation throttle is enabled, then update the accounting. | |
4253 | * We only track child I/Os that are part of an allocating async | |
4254 | * write. We must do this since the allocation is performed | |
4255 | * by the logical I/O but the actual write is done by child I/Os. | |
4256 | */ | |
4257 | if (zio->io_flags & ZIO_FLAG_IO_ALLOCATING && | |
4258 | zio->io_child_type == ZIO_CHILD_VDEV) { | |
4259 | ASSERT(spa_normal_class( | |
4260 | zio->io_spa)->mc_alloc_throttle_enabled); | |
4261 | zio_dva_throttle_done(zio); | |
4262 | } | |
4263 | ||
4264 | /* | |
4265 | * If the allocation throttle is enabled, verify that | |
4266 | * we have decremented the refcounts for every I/O that was throttled. | |
4267 | */ | |
4268 | if (zio->io_flags & ZIO_FLAG_IO_ALLOCATING) { | |
4269 | ASSERT(zio->io_type == ZIO_TYPE_WRITE); | |
4270 | ASSERT(zio->io_priority == ZIO_PRIORITY_ASYNC_WRITE); | |
4271 | ASSERT(zio->io_bp != NULL); | |
4272 | metaslab_group_alloc_verify(zio->io_spa, zio->io_bp, zio); | |
4273 | VERIFY(refcount_not_held( | |
4274 | &(spa_normal_class(zio->io_spa)->mc_alloc_slots), zio)); | |
4275 | } | |
4276 | ||
4277 | ||
1c27024e DB |
4278 | for (int c = 0; c < ZIO_CHILD_TYPES; c++) |
4279 | for (int w = 0; w < ZIO_WAIT_TYPES; w++) | |
b128c09f BB |
4280 | ASSERT(zio->io_children[c][w] == 0); |
4281 | ||
9b67f605 | 4282 | if (zio->io_bp != NULL && !BP_IS_EMBEDDED(zio->io_bp)) { |
c776b317 BB |
4283 | ASSERT(zio->io_bp->blk_pad[0] == 0); |
4284 | ASSERT(zio->io_bp->blk_pad[1] == 0); | |
d1d7e268 MK |
4285 | ASSERT(bcmp(zio->io_bp, &zio->io_bp_copy, |
4286 | sizeof (blkptr_t)) == 0 || | |
c776b317 BB |
4287 | (zio->io_bp == zio_unique_parent(zio)->io_bp)); |
4288 | if (zio->io_type == ZIO_TYPE_WRITE && !BP_IS_HOLE(zio->io_bp) && | |
428870ff | 4289 | zio->io_bp_override == NULL && |
b128c09f | 4290 | !(zio->io_flags & ZIO_FLAG_IO_REPAIR)) { |
d1d7e268 MK |
4291 | ASSERT3U(zio->io_prop.zp_copies, <=, |
4292 | BP_GET_NDVAS(zio->io_bp)); | |
c776b317 | 4293 | ASSERT(BP_COUNT_GANG(zio->io_bp) == 0 || |
d1d7e268 MK |
4294 | (BP_COUNT_GANG(zio->io_bp) == |
4295 | BP_GET_NDVAS(zio->io_bp))); | |
b128c09f | 4296 | } |
03c6040b GW |
4297 | if (zio->io_flags & ZIO_FLAG_NOPWRITE) |
4298 | VERIFY(BP_EQUAL(zio->io_bp, &zio->io_bp_orig)); | |
b128c09f BB |
4299 | } |
4300 | ||
4301 | /* | |
428870ff | 4302 | * If there were child vdev/gang/ddt errors, they apply to us now. |
b128c09f BB |
4303 | */ |
4304 | zio_inherit_child_errors(zio, ZIO_CHILD_VDEV); | |
4305 | zio_inherit_child_errors(zio, ZIO_CHILD_GANG); | |
428870ff BB |
4306 | zio_inherit_child_errors(zio, ZIO_CHILD_DDT); |
4307 | ||
4308 | /* | |
4309 | * If the I/O on the transformed data was successful, generate any | |
4310 | * checksum reports now while we still have the transformed data. | |
4311 | */ | |
4312 | if (zio->io_error == 0) { | |
4313 | while (zio->io_cksum_report != NULL) { | |
4314 | zio_cksum_report_t *zcr = zio->io_cksum_report; | |
4315 | uint64_t align = zcr->zcr_align; | |
a6255b7f | 4316 | uint64_t asize = P2ROUNDUP(psize, align); |
a6255b7f DQ |
4317 | abd_t *adata = zio->io_abd; |
4318 | ||
4319 | if (asize != psize) { | |
84c07ada | 4320 | adata = abd_alloc(asize, B_TRUE); |
a6255b7f DQ |
4321 | abd_copy(adata, zio->io_abd, psize); |
4322 | abd_zero_off(adata, psize, asize - psize); | |
428870ff BB |
4323 | } |
4324 | ||
4325 | zio->io_cksum_report = zcr->zcr_next; | |
4326 | zcr->zcr_next = NULL; | |
84c07ada | 4327 | zcr->zcr_finish(zcr, adata); |
428870ff BB |
4328 | zfs_ereport_free_checksum(zcr); |
4329 | ||
a6255b7f DQ |
4330 | if (asize != psize) |
4331 | abd_free(adata); | |
428870ff BB |
4332 | } |
4333 | } | |
b128c09f BB |
4334 | |
4335 | zio_pop_transforms(zio); /* note: may set zio->io_error */ | |
4336 | ||
a6255b7f | 4337 | vdev_stat_update(zio, psize); |
b128c09f | 4338 | |
a69052be | 4339 | /* |
cc92e9d0 | 4340 | * If this I/O is attached to a particular vdev is slow, exceeding |
72f53c56 MJ |
4341 | * 30 seconds to complete, post an error described the I/O delay. |
4342 | * We ignore these errors if the device is currently unavailable. | |
a69052be | 4343 | */ |
193a37cb | 4344 | if (zio->io_delay >= MSEC2NSEC(zio_delay_max)) { |
72f53c56 MJ |
4345 | if (zio->io_vd != NULL && !vdev_is_dead(zio->io_vd)) |
4346 | zfs_ereport_post(FM_EREPORT_ZFS_DELAY, zio->io_spa, | |
b5256303 | 4347 | zio->io_vd, &zio->io_bookmark, zio, 0, 0); |
72f53c56 | 4348 | } |
a69052be | 4349 | |
b128c09f BB |
4350 | if (zio->io_error) { |
4351 | /* | |
4352 | * If this I/O is attached to a particular vdev, | |
4353 | * generate an error message describing the I/O failure | |
4354 | * at the block level. We ignore these errors if the | |
4355 | * device is currently unavailable. | |
4356 | */ | |
c776b317 | 4357 | if (zio->io_error != ECKSUM && zio->io_vd != NULL && |
02730c33 | 4358 | !vdev_is_dead(zio->io_vd)) |
c776b317 | 4359 | zfs_ereport_post(FM_EREPORT_ZFS_IO, zio->io_spa, |
b5256303 | 4360 | zio->io_vd, &zio->io_bookmark, zio, 0, 0); |
34dc7c2f | 4361 | |
428870ff BB |
4362 | if ((zio->io_error == EIO || !(zio->io_flags & |
4363 | (ZIO_FLAG_SPECULATIVE | ZIO_FLAG_DONT_PROPAGATE))) && | |
c776b317 | 4364 | zio == zio->io_logical) { |
b128c09f BB |
4365 | /* |
4366 | * For logical I/O requests, tell the SPA to log the | |
4367 | * error and generate a logical data ereport. | |
4368 | */ | |
b5256303 | 4369 | spa_log_error(zio->io_spa, &zio->io_bookmark); |
d1d7e268 | 4370 | zfs_ereport_post(FM_EREPORT_ZFS_DATA, zio->io_spa, |
b5256303 | 4371 | NULL, &zio->io_bookmark, zio, 0, 0); |
b128c09f BB |
4372 | } |
4373 | } | |
34dc7c2f | 4374 | |
c776b317 | 4375 | if (zio->io_error && zio == zio->io_logical) { |
b128c09f BB |
4376 | /* |
4377 | * Determine whether zio should be reexecuted. This will | |
4378 | * propagate all the way to the root via zio_notify_parent(). | |
4379 | */ | |
c776b317 | 4380 | ASSERT(zio->io_vd == NULL && zio->io_bp != NULL); |
428870ff | 4381 | ASSERT(zio->io_child_type == ZIO_CHILD_LOGICAL); |
b128c09f | 4382 | |
428870ff BB |
4383 | if (IO_IS_ALLOCATING(zio) && |
4384 | !(zio->io_flags & ZIO_FLAG_CANFAIL)) { | |
b128c09f BB |
4385 | if (zio->io_error != ENOSPC) |
4386 | zio->io_reexecute |= ZIO_REEXECUTE_NOW; | |
4387 | else | |
4388 | zio->io_reexecute |= ZIO_REEXECUTE_SUSPEND; | |
428870ff | 4389 | } |
b128c09f BB |
4390 | |
4391 | if ((zio->io_type == ZIO_TYPE_READ || | |
4392 | zio->io_type == ZIO_TYPE_FREE) && | |
572e2857 | 4393 | !(zio->io_flags & ZIO_FLAG_SCAN_THREAD) && |
b128c09f | 4394 | zio->io_error == ENXIO && |
c776b317 BB |
4395 | spa_load_state(zio->io_spa) == SPA_LOAD_NONE && |
4396 | spa_get_failmode(zio->io_spa) != ZIO_FAILURE_MODE_CONTINUE) | |
b128c09f BB |
4397 | zio->io_reexecute |= ZIO_REEXECUTE_SUSPEND; |
4398 | ||
4399 | if (!(zio->io_flags & ZIO_FLAG_CANFAIL) && !zio->io_reexecute) | |
4400 | zio->io_reexecute |= ZIO_REEXECUTE_SUSPEND; | |
428870ff BB |
4401 | |
4402 | /* | |
4403 | * Here is a possibly good place to attempt to do | |
4404 | * either combinatorial reconstruction or error correction | |
4405 | * based on checksums. It also might be a good place | |
4406 | * to send out preliminary ereports before we suspend | |
4407 | * processing. | |
4408 | */ | |
34dc7c2f BB |
4409 | } |
4410 | ||
4411 | /* | |
b128c09f BB |
4412 | * If there were logical child errors, they apply to us now. |
4413 | * We defer this until now to avoid conflating logical child | |
4414 | * errors with errors that happened to the zio itself when | |
4415 | * updating vdev stats and reporting FMA events above. | |
34dc7c2f | 4416 | */ |
b128c09f | 4417 | zio_inherit_child_errors(zio, ZIO_CHILD_LOGICAL); |
34dc7c2f | 4418 | |
428870ff BB |
4419 | if ((zio->io_error || zio->io_reexecute) && |
4420 | IO_IS_ALLOCATING(zio) && zio->io_gang_leader == zio && | |
03c6040b | 4421 | !(zio->io_flags & (ZIO_FLAG_IO_REWRITE | ZIO_FLAG_NOPWRITE))) |
c776b317 | 4422 | zio_dva_unallocate(zio, zio->io_gang_tree, zio->io_bp); |
9babb374 BB |
4423 | |
4424 | zio_gang_tree_free(&zio->io_gang_tree); | |
4425 | ||
4426 | /* | |
4427 | * Godfather I/Os should never suspend. | |
4428 | */ | |
4429 | if ((zio->io_flags & ZIO_FLAG_GODFATHER) && | |
4430 | (zio->io_reexecute & ZIO_REEXECUTE_SUSPEND)) | |
a32494d2 | 4431 | zio->io_reexecute &= ~ZIO_REEXECUTE_SUSPEND; |
9babb374 | 4432 | |
b128c09f BB |
4433 | if (zio->io_reexecute) { |
4434 | /* | |
4435 | * This is a logical I/O that wants to reexecute. | |
4436 | * | |
4437 | * Reexecute is top-down. When an i/o fails, if it's not | |
4438 | * the root, it simply notifies its parent and sticks around. | |
4439 | * The parent, seeing that it still has children in zio_done(), | |
4440 | * does the same. This percolates all the way up to the root. | |
4441 | * The root i/o will reexecute or suspend the entire tree. | |
4442 | * | |
4443 | * This approach ensures that zio_reexecute() honors | |
4444 | * all the original i/o dependency relationships, e.g. | |
4445 | * parents not executing until children are ready. | |
4446 | */ | |
4447 | ASSERT(zio->io_child_type == ZIO_CHILD_LOGICAL); | |
34dc7c2f | 4448 | |
9babb374 | 4449 | zio->io_gang_leader = NULL; |
b128c09f | 4450 | |
d164b209 BB |
4451 | mutex_enter(&zio->io_lock); |
4452 | zio->io_state[ZIO_WAIT_DONE] = 1; | |
4453 | mutex_exit(&zio->io_lock); | |
4454 | ||
9babb374 BB |
4455 | /* |
4456 | * "The Godfather" I/O monitors its children but is | |
4457 | * not a true parent to them. It will track them through | |
4458 | * the pipeline but severs its ties whenever they get into | |
4459 | * trouble (e.g. suspended). This allows "The Godfather" | |
4460 | * I/O to return status without blocking. | |
4461 | */ | |
3dfb57a3 DB |
4462 | zl = NULL; |
4463 | for (pio = zio_walk_parents(zio, &zl); pio != NULL; | |
4464 | pio = pio_next) { | |
4465 | zio_link_t *remove_zl = zl; | |
4466 | pio_next = zio_walk_parents(zio, &zl); | |
9babb374 BB |
4467 | |
4468 | if ((pio->io_flags & ZIO_FLAG_GODFATHER) && | |
4469 | (zio->io_reexecute & ZIO_REEXECUTE_SUSPEND)) { | |
3dfb57a3 | 4470 | zio_remove_child(pio, zio, remove_zl); |
9babb374 BB |
4471 | zio_notify_parent(pio, zio, ZIO_WAIT_DONE); |
4472 | } | |
4473 | } | |
4474 | ||
d164b209 | 4475 | if ((pio = zio_unique_parent(zio)) != NULL) { |
b128c09f BB |
4476 | /* |
4477 | * We're not a root i/o, so there's nothing to do | |
4478 | * but notify our parent. Don't propagate errors | |
4479 | * upward since we haven't permanently failed yet. | |
4480 | */ | |
9babb374 | 4481 | ASSERT(!(zio->io_flags & ZIO_FLAG_GODFATHER)); |
b128c09f BB |
4482 | zio->io_flags |= ZIO_FLAG_DONT_PROPAGATE; |
4483 | zio_notify_parent(pio, zio, ZIO_WAIT_DONE); | |
4484 | } else if (zio->io_reexecute & ZIO_REEXECUTE_SUSPEND) { | |
4485 | /* | |
4486 | * We'd fail again if we reexecuted now, so suspend | |
4487 | * until conditions improve (e.g. device comes online). | |
4488 | */ | |
cec3a0a1 | 4489 | zio_suspend(zio->io_spa, zio, ZIO_SUSPEND_IOERR); |
b128c09f BB |
4490 | } else { |
4491 | /* | |
4492 | * Reexecution is potentially a huge amount of work. | |
4493 | * Hand it off to the otherwise-unused claim taskq. | |
4494 | */ | |
a38718a6 | 4495 | ASSERT(taskq_empty_ent(&zio->io_tqent)); |
7ef5e54e AL |
4496 | spa_taskq_dispatch_ent(zio->io_spa, |
4497 | ZIO_TYPE_CLAIM, ZIO_TASKQ_ISSUE, | |
a38718a6 GA |
4498 | (task_func_t *)zio_reexecute, zio, 0, |
4499 | &zio->io_tqent); | |
b128c09f BB |
4500 | } |
4501 | return (ZIO_PIPELINE_STOP); | |
34dc7c2f BB |
4502 | } |
4503 | ||
428870ff | 4504 | ASSERT(zio->io_child_count == 0); |
b128c09f BB |
4505 | ASSERT(zio->io_reexecute == 0); |
4506 | ASSERT(zio->io_error == 0 || (zio->io_flags & ZIO_FLAG_CANFAIL)); | |
34dc7c2f | 4507 | |
428870ff BB |
4508 | /* |
4509 | * Report any checksum errors, since the I/O is complete. | |
4510 | */ | |
4511 | while (zio->io_cksum_report != NULL) { | |
4512 | zio_cksum_report_t *zcr = zio->io_cksum_report; | |
4513 | zio->io_cksum_report = zcr->zcr_next; | |
4514 | zcr->zcr_next = NULL; | |
4515 | zcr->zcr_finish(zcr, NULL); | |
4516 | zfs_ereport_free_checksum(zcr); | |
4517 | } | |
4518 | ||
920dd524 | 4519 | if (zio->io_flags & ZIO_FLAG_FASTWRITE && zio->io_bp && |
9b67f605 MA |
4520 | !BP_IS_HOLE(zio->io_bp) && !BP_IS_EMBEDDED(zio->io_bp) && |
4521 | !(zio->io_flags & ZIO_FLAG_NOPWRITE)) { | |
920dd524 ED |
4522 | metaslab_fastwrite_unmark(zio->io_spa, zio->io_bp); |
4523 | } | |
4524 | ||
d164b209 BB |
4525 | /* |
4526 | * It is the responsibility of the done callback to ensure that this | |
4527 | * particular zio is no longer discoverable for adoption, and as | |
4528 | * such, cannot acquire any new parents. | |
4529 | */ | |
b128c09f BB |
4530 | if (zio->io_done) |
4531 | zio->io_done(zio); | |
34dc7c2f | 4532 | |
d164b209 BB |
4533 | mutex_enter(&zio->io_lock); |
4534 | zio->io_state[ZIO_WAIT_DONE] = 1; | |
4535 | mutex_exit(&zio->io_lock); | |
34dc7c2f | 4536 | |
3dfb57a3 DB |
4537 | zl = NULL; |
4538 | for (pio = zio_walk_parents(zio, &zl); pio != NULL; pio = pio_next) { | |
4539 | zio_link_t *remove_zl = zl; | |
4540 | pio_next = zio_walk_parents(zio, &zl); | |
4541 | zio_remove_child(pio, zio, remove_zl); | |
b128c09f BB |
4542 | zio_notify_parent(pio, zio, ZIO_WAIT_DONE); |
4543 | } | |
34dc7c2f | 4544 | |
b128c09f BB |
4545 | if (zio->io_waiter != NULL) { |
4546 | mutex_enter(&zio->io_lock); | |
4547 | zio->io_executor = NULL; | |
4548 | cv_broadcast(&zio->io_cv); | |
4549 | mutex_exit(&zio->io_lock); | |
4550 | } else { | |
4551 | zio_destroy(zio); | |
4552 | } | |
34dc7c2f | 4553 | |
b128c09f | 4554 | return (ZIO_PIPELINE_STOP); |
34dc7c2f BB |
4555 | } |
4556 | ||
4557 | /* | |
b128c09f BB |
4558 | * ========================================================================== |
4559 | * I/O pipeline definition | |
4560 | * ========================================================================== | |
34dc7c2f | 4561 | */ |
428870ff | 4562 | static zio_pipe_stage_t *zio_pipeline[] = { |
b128c09f | 4563 | NULL, |
b128c09f | 4564 | zio_read_bp_init, |
3dfb57a3 | 4565 | zio_write_bp_init, |
428870ff BB |
4566 | zio_free_bp_init, |
4567 | zio_issue_async, | |
3dfb57a3 | 4568 | zio_write_compress, |
b5256303 | 4569 | zio_encrypt, |
b128c09f | 4570 | zio_checksum_generate, |
03c6040b | 4571 | zio_nop_write, |
428870ff BB |
4572 | zio_ddt_read_start, |
4573 | zio_ddt_read_done, | |
4574 | zio_ddt_write, | |
4575 | zio_ddt_free, | |
b128c09f BB |
4576 | zio_gang_assemble, |
4577 | zio_gang_issue, | |
3dfb57a3 | 4578 | zio_dva_throttle, |
b128c09f BB |
4579 | zio_dva_allocate, |
4580 | zio_dva_free, | |
4581 | zio_dva_claim, | |
4582 | zio_ready, | |
4583 | zio_vdev_io_start, | |
4584 | zio_vdev_io_done, | |
4585 | zio_vdev_io_assess, | |
4586 | zio_checksum_verify, | |
4587 | zio_done | |
4588 | }; | |
c28b2279 | 4589 | |
9ae529ec | 4590 | |
9ae529ec | 4591 | |
9ae529ec | 4592 | |
fcff0f35 PD |
4593 | /* |
4594 | * Compare two zbookmark_phys_t's to see which we would reach first in a | |
4595 | * pre-order traversal of the object tree. | |
4596 | * | |
4597 | * This is simple in every case aside from the meta-dnode object. For all other | |
4598 | * objects, we traverse them in order (object 1 before object 2, and so on). | |
4599 | * However, all of these objects are traversed while traversing object 0, since | |
4600 | * the data it points to is the list of objects. Thus, we need to convert to a | |
4601 | * canonical representation so we can compare meta-dnode bookmarks to | |
4602 | * non-meta-dnode bookmarks. | |
4603 | * | |
4604 | * We do this by calculating "equivalents" for each field of the zbookmark. | |
4605 | * zbookmarks outside of the meta-dnode use their own object and level, and | |
4606 | * calculate the level 0 equivalent (the first L0 blkid that is contained in the | |
4607 | * blocks this bookmark refers to) by multiplying their blkid by their span | |
4608 | * (the number of L0 blocks contained within one block at their level). | |
4609 | * zbookmarks inside the meta-dnode calculate their object equivalent | |
4610 | * (which is L0equiv * dnodes per data block), use 0 for their L0equiv, and use | |
4611 | * level + 1<<31 (any value larger than a level could ever be) for their level. | |
4612 | * This causes them to always compare before a bookmark in their object | |
4613 | * equivalent, compare appropriately to bookmarks in other objects, and to | |
4614 | * compare appropriately to other bookmarks in the meta-dnode. | |
4615 | */ | |
4616 | int | |
4617 | zbookmark_compare(uint16_t dbss1, uint8_t ibs1, uint16_t dbss2, uint8_t ibs2, | |
4618 | const zbookmark_phys_t *zb1, const zbookmark_phys_t *zb2) | |
4619 | { | |
4620 | /* | |
4621 | * These variables represent the "equivalent" values for the zbookmark, | |
4622 | * after converting zbookmarks inside the meta dnode to their | |
4623 | * normal-object equivalents. | |
4624 | */ | |
4625 | uint64_t zb1obj, zb2obj; | |
4626 | uint64_t zb1L0, zb2L0; | |
4627 | uint64_t zb1level, zb2level; | |
4628 | ||
4629 | if (zb1->zb_object == zb2->zb_object && | |
4630 | zb1->zb_level == zb2->zb_level && | |
4631 | zb1->zb_blkid == zb2->zb_blkid) | |
4632 | return (0); | |
9ae529ec | 4633 | |
fcff0f35 PD |
4634 | /* |
4635 | * BP_SPANB calculates the span in blocks. | |
4636 | */ | |
4637 | zb1L0 = (zb1->zb_blkid) * BP_SPANB(ibs1, zb1->zb_level); | |
4638 | zb2L0 = (zb2->zb_blkid) * BP_SPANB(ibs2, zb2->zb_level); | |
9ae529ec CS |
4639 | |
4640 | if (zb1->zb_object == DMU_META_DNODE_OBJECT) { | |
fcff0f35 PD |
4641 | zb1obj = zb1L0 * (dbss1 << (SPA_MINBLOCKSHIFT - DNODE_SHIFT)); |
4642 | zb1L0 = 0; | |
4643 | zb1level = zb1->zb_level + COMPARE_META_LEVEL; | |
4644 | } else { | |
4645 | zb1obj = zb1->zb_object; | |
4646 | zb1level = zb1->zb_level; | |
9ae529ec CS |
4647 | } |
4648 | ||
fcff0f35 PD |
4649 | if (zb2->zb_object == DMU_META_DNODE_OBJECT) { |
4650 | zb2obj = zb2L0 * (dbss2 << (SPA_MINBLOCKSHIFT - DNODE_SHIFT)); | |
4651 | zb2L0 = 0; | |
4652 | zb2level = zb2->zb_level + COMPARE_META_LEVEL; | |
4653 | } else { | |
4654 | zb2obj = zb2->zb_object; | |
4655 | zb2level = zb2->zb_level; | |
4656 | } | |
4657 | ||
4658 | /* Now that we have a canonical representation, do the comparison. */ | |
4659 | if (zb1obj != zb2obj) | |
4660 | return (zb1obj < zb2obj ? -1 : 1); | |
4661 | else if (zb1L0 != zb2L0) | |
4662 | return (zb1L0 < zb2L0 ? -1 : 1); | |
4663 | else if (zb1level != zb2level) | |
4664 | return (zb1level > zb2level ? -1 : 1); | |
4665 | /* | |
4666 | * This can (theoretically) happen if the bookmarks have the same object | |
4667 | * and level, but different blkids, if the block sizes are not the same. | |
4668 | * There is presently no way to change the indirect block sizes | |
4669 | */ | |
4670 | return (0); | |
4671 | } | |
4672 | ||
4673 | /* | |
4674 | * This function checks the following: given that last_block is the place that | |
4675 | * our traversal stopped last time, does that guarantee that we've visited | |
4676 | * every node under subtree_root? Therefore, we can't just use the raw output | |
4677 | * of zbookmark_compare. We have to pass in a modified version of | |
4678 | * subtree_root; by incrementing the block id, and then checking whether | |
4679 | * last_block is before or equal to that, we can tell whether or not having | |
4680 | * visited last_block implies that all of subtree_root's children have been | |
4681 | * visited. | |
4682 | */ | |
4683 | boolean_t | |
4684 | zbookmark_subtree_completed(const dnode_phys_t *dnp, | |
4685 | const zbookmark_phys_t *subtree_root, const zbookmark_phys_t *last_block) | |
4686 | { | |
4687 | zbookmark_phys_t mod_zb = *subtree_root; | |
4688 | mod_zb.zb_blkid++; | |
4689 | ASSERT(last_block->zb_level == 0); | |
4690 | ||
4691 | /* The objset_phys_t isn't before anything. */ | |
4692 | if (dnp == NULL) | |
9ae529ec | 4693 | return (B_FALSE); |
fcff0f35 PD |
4694 | |
4695 | /* | |
4696 | * We pass in 1ULL << (DNODE_BLOCK_SHIFT - SPA_MINBLOCKSHIFT) for the | |
4697 | * data block size in sectors, because that variable is only used if | |
4698 | * the bookmark refers to a block in the meta-dnode. Since we don't | |
4699 | * know without examining it what object it refers to, and there's no | |
4700 | * harm in passing in this value in other cases, we always pass it in. | |
4701 | * | |
4702 | * We pass in 0 for the indirect block size shift because zb2 must be | |
4703 | * level 0. The indirect block size is only used to calculate the span | |
4704 | * of the bookmark, but since the bookmark must be level 0, the span is | |
4705 | * always 1, so the math works out. | |
4706 | * | |
4707 | * If you make changes to how the zbookmark_compare code works, be sure | |
4708 | * to make sure that this code still works afterwards. | |
4709 | */ | |
4710 | return (zbookmark_compare(dnp->dn_datablkszsec, dnp->dn_indblkshift, | |
4711 | 1ULL << (DNODE_BLOCK_SHIFT - SPA_MINBLOCKSHIFT), 0, &mod_zb, | |
4712 | last_block) <= 0); | |
9ae529ec CS |
4713 | } |
4714 | ||
93ce2b4c | 4715 | #if defined(_KERNEL) |
c28b2279 | 4716 | EXPORT_SYMBOL(zio_type_name); |
81971b13 BB |
4717 | EXPORT_SYMBOL(zio_buf_alloc); |
4718 | EXPORT_SYMBOL(zio_data_buf_alloc); | |
4719 | EXPORT_SYMBOL(zio_buf_free); | |
4720 | EXPORT_SYMBOL(zio_data_buf_free); | |
c28b2279 | 4721 | |
a69052be | 4722 | module_param(zio_delay_max, int, 0644); |
c409e464 BB |
4723 | MODULE_PARM_DESC(zio_delay_max, "Max zio millisec delay before posting event"); |
4724 | ||
4725 | module_param(zio_requeue_io_start_cut_in_line, int, 0644); | |
4726 | MODULE_PARM_DESC(zio_requeue_io_start_cut_in_line, "Prioritize requeued I/O"); | |
29dee3ee CP |
4727 | |
4728 | module_param(zfs_sync_pass_deferred_free, int, 0644); | |
4729 | MODULE_PARM_DESC(zfs_sync_pass_deferred_free, | |
d1d7e268 | 4730 | "Defer frees starting in this pass"); |
29dee3ee CP |
4731 | |
4732 | module_param(zfs_sync_pass_dont_compress, int, 0644); | |
4733 | MODULE_PARM_DESC(zfs_sync_pass_dont_compress, | |
d1d7e268 | 4734 | "Don't compress starting in this pass"); |
29dee3ee CP |
4735 | |
4736 | module_param(zfs_sync_pass_rewrite, int, 0644); | |
4737 | MODULE_PARM_DESC(zfs_sync_pass_rewrite, | |
d1d7e268 | 4738 | "Rewrite new bps starting in this pass"); |
3dfb57a3 DB |
4739 | |
4740 | module_param(zio_dva_throttle_enabled, int, 0644); | |
4741 | MODULE_PARM_DESC(zio_dva_throttle_enabled, | |
4742 | "Throttle block allocations in the ZIO pipeline"); | |
c28b2279 | 4743 | #endif |