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428870ff BB |
1 | /* |
2 | * CDDL HEADER START | |
3 | * | |
4 | * The contents of this file are subject to the terms of the | |
5 | * Common Development and Distribution License (the "License"). | |
6 | * You may not use this file except in compliance with the License. | |
7 | * | |
8 | * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE | |
9 | * or http://www.opensolaris.org/os/licensing. | |
10 | * See the License for the specific language governing permissions | |
11 | * and limitations under the License. | |
12 | * | |
13 | * When distributing Covered Code, include this CDDL HEADER in each | |
14 | * file and include the License file at usr/src/OPENSOLARIS.LICENSE. | |
15 | * If applicable, add the following below this CDDL HEADER, with the | |
16 | * fields enclosed by brackets "[]" replaced with your own identifying | |
17 | * information: Portions Copyright [yyyy] [name of copyright owner] | |
18 | * | |
19 | * CDDL HEADER END | |
20 | */ | |
21 | ||
22 | /* | |
23 | * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved. | |
a6255b7f | 24 | * Copyright (c) 2012, 2016 by Delphix. All rights reserved. |
428870ff BB |
25 | */ |
26 | ||
27 | #include <sys/zfs_context.h> | |
28 | #include <sys/spa.h> | |
29 | #include <sys/spa_impl.h> | |
30 | #include <sys/zio.h> | |
31 | #include <sys/ddt.h> | |
32 | #include <sys/zap.h> | |
33 | #include <sys/dmu_tx.h> | |
34 | #include <sys/arc.h> | |
35 | #include <sys/dsl_pool.h> | |
36 | #include <sys/zio_checksum.h> | |
37 | #include <sys/zio_compress.h> | |
38 | #include <sys/dsl_scan.h> | |
a6255b7f | 39 | #include <sys/abd.h> |
428870ff | 40 | |
ecf3d9b8 JL |
41 | static kmem_cache_t *ddt_cache; |
42 | static kmem_cache_t *ddt_entry_cache; | |
43 | ||
572e2857 BB |
44 | /* |
45 | * Enable/disable prefetching of dedup-ed blocks which are going to be freed. | |
46 | */ | |
0dfc7324 | 47 | int zfs_dedup_prefetch = 0; |
572e2857 | 48 | |
428870ff BB |
49 | static const ddt_ops_t *ddt_ops[DDT_TYPES] = { |
50 | &ddt_zap_ops, | |
51 | }; | |
52 | ||
53 | static const char *ddt_class_name[DDT_CLASSES] = { | |
54 | "ditto", | |
55 | "duplicate", | |
56 | "unique", | |
57 | }; | |
58 | ||
59 | static void | |
60 | ddt_object_create(ddt_t *ddt, enum ddt_type type, enum ddt_class class, | |
61 | dmu_tx_t *tx) | |
62 | { | |
63 | spa_t *spa = ddt->ddt_spa; | |
64 | objset_t *os = ddt->ddt_os; | |
65 | uint64_t *objectp = &ddt->ddt_object[type][class]; | |
3c67d83a TH |
66 | boolean_t prehash = zio_checksum_table[ddt->ddt_checksum].ci_flags & |
67 | ZCHECKSUM_FLAG_DEDUP; | |
428870ff BB |
68 | char name[DDT_NAMELEN]; |
69 | ||
70 | ddt_object_name(ddt, type, class, name); | |
71 | ||
72 | ASSERT(*objectp == 0); | |
73 | VERIFY(ddt_ops[type]->ddt_op_create(os, objectp, tx, prehash) == 0); | |
74 | ASSERT(*objectp != 0); | |
75 | ||
76 | VERIFY(zap_add(os, DMU_POOL_DIRECTORY_OBJECT, name, | |
77 | sizeof (uint64_t), 1, objectp, tx) == 0); | |
78 | ||
79 | VERIFY(zap_add(os, spa->spa_ddt_stat_object, name, | |
80 | sizeof (uint64_t), sizeof (ddt_histogram_t) / sizeof (uint64_t), | |
81 | &ddt->ddt_histogram[type][class], tx) == 0); | |
82 | } | |
83 | ||
84 | static void | |
85 | ddt_object_destroy(ddt_t *ddt, enum ddt_type type, enum ddt_class class, | |
86 | dmu_tx_t *tx) | |
87 | { | |
88 | spa_t *spa = ddt->ddt_spa; | |
89 | objset_t *os = ddt->ddt_os; | |
90 | uint64_t *objectp = &ddt->ddt_object[type][class]; | |
e8fd45a0 | 91 | uint64_t count; |
428870ff BB |
92 | char name[DDT_NAMELEN]; |
93 | ||
94 | ddt_object_name(ddt, type, class, name); | |
95 | ||
96 | ASSERT(*objectp != 0); | |
428870ff | 97 | ASSERT(ddt_histogram_empty(&ddt->ddt_histogram[type][class])); |
e8fd45a0 | 98 | VERIFY(ddt_object_count(ddt, type, class, &count) == 0 && count == 0); |
428870ff BB |
99 | VERIFY(zap_remove(os, DMU_POOL_DIRECTORY_OBJECT, name, tx) == 0); |
100 | VERIFY(zap_remove(os, spa->spa_ddt_stat_object, name, tx) == 0); | |
101 | VERIFY(ddt_ops[type]->ddt_op_destroy(os, *objectp, tx) == 0); | |
102 | bzero(&ddt->ddt_object_stats[type][class], sizeof (ddt_object_t)); | |
103 | ||
104 | *objectp = 0; | |
105 | } | |
106 | ||
107 | static int | |
108 | ddt_object_load(ddt_t *ddt, enum ddt_type type, enum ddt_class class) | |
109 | { | |
110 | ddt_object_t *ddo = &ddt->ddt_object_stats[type][class]; | |
111 | dmu_object_info_t doi; | |
e8fd45a0 | 112 | uint64_t count; |
428870ff BB |
113 | char name[DDT_NAMELEN]; |
114 | int error; | |
115 | ||
116 | ddt_object_name(ddt, type, class, name); | |
117 | ||
118 | error = zap_lookup(ddt->ddt_os, DMU_POOL_DIRECTORY_OBJECT, name, | |
119 | sizeof (uint64_t), 1, &ddt->ddt_object[type][class]); | |
b0bc7a84 | 120 | if (error != 0) |
428870ff BB |
121 | return (error); |
122 | ||
ff9b1d07 | 123 | error = zap_lookup(ddt->ddt_os, ddt->ddt_spa->spa_ddt_stat_object, name, |
428870ff | 124 | sizeof (uint64_t), sizeof (ddt_histogram_t) / sizeof (uint64_t), |
ff9b1d07 BB |
125 | &ddt->ddt_histogram[type][class]); |
126 | if (error != 0) | |
127 | return (error); | |
428870ff BB |
128 | |
129 | /* | |
130 | * Seed the cached statistics. | |
131 | */ | |
2a4a9dc2 BB |
132 | error = ddt_object_info(ddt, type, class, &doi); |
133 | if (error) | |
134 | return (error); | |
428870ff | 135 | |
e8fd45a0 BB |
136 | error = ddt_object_count(ddt, type, class, &count); |
137 | if (error) | |
138 | return (error); | |
139 | ||
140 | ddo->ddo_count = count; | |
428870ff BB |
141 | ddo->ddo_dspace = doi.doi_physical_blocks_512 << 9; |
142 | ddo->ddo_mspace = doi.doi_fill_count * doi.doi_data_block_size; | |
143 | ||
b0bc7a84 | 144 | return (0); |
428870ff BB |
145 | } |
146 | ||
147 | static void | |
148 | ddt_object_sync(ddt_t *ddt, enum ddt_type type, enum ddt_class class, | |
149 | dmu_tx_t *tx) | |
150 | { | |
151 | ddt_object_t *ddo = &ddt->ddt_object_stats[type][class]; | |
152 | dmu_object_info_t doi; | |
e8fd45a0 | 153 | uint64_t count; |
428870ff BB |
154 | char name[DDT_NAMELEN]; |
155 | ||
156 | ddt_object_name(ddt, type, class, name); | |
157 | ||
158 | VERIFY(zap_update(ddt->ddt_os, ddt->ddt_spa->spa_ddt_stat_object, name, | |
159 | sizeof (uint64_t), sizeof (ddt_histogram_t) / sizeof (uint64_t), | |
160 | &ddt->ddt_histogram[type][class], tx) == 0); | |
161 | ||
162 | /* | |
163 | * Cache DDT statistics; this is the only time they'll change. | |
164 | */ | |
165 | VERIFY(ddt_object_info(ddt, type, class, &doi) == 0); | |
e8fd45a0 | 166 | VERIFY(ddt_object_count(ddt, type, class, &count) == 0); |
428870ff | 167 | |
e8fd45a0 | 168 | ddo->ddo_count = count; |
428870ff BB |
169 | ddo->ddo_dspace = doi.doi_physical_blocks_512 << 9; |
170 | ddo->ddo_mspace = doi.doi_fill_count * doi.doi_data_block_size; | |
171 | } | |
172 | ||
173 | static int | |
174 | ddt_object_lookup(ddt_t *ddt, enum ddt_type type, enum ddt_class class, | |
175 | ddt_entry_t *dde) | |
176 | { | |
177 | if (!ddt_object_exists(ddt, type, class)) | |
2e528b49 | 178 | return (SET_ERROR(ENOENT)); |
428870ff BB |
179 | |
180 | return (ddt_ops[type]->ddt_op_lookup(ddt->ddt_os, | |
181 | ddt->ddt_object[type][class], dde)); | |
182 | } | |
183 | ||
184 | static void | |
185 | ddt_object_prefetch(ddt_t *ddt, enum ddt_type type, enum ddt_class class, | |
186 | ddt_entry_t *dde) | |
187 | { | |
188 | if (!ddt_object_exists(ddt, type, class)) | |
189 | return; | |
190 | ||
191 | ddt_ops[type]->ddt_op_prefetch(ddt->ddt_os, | |
192 | ddt->ddt_object[type][class], dde); | |
193 | } | |
194 | ||
195 | int | |
196 | ddt_object_update(ddt_t *ddt, enum ddt_type type, enum ddt_class class, | |
197 | ddt_entry_t *dde, dmu_tx_t *tx) | |
198 | { | |
199 | ASSERT(ddt_object_exists(ddt, type, class)); | |
200 | ||
201 | return (ddt_ops[type]->ddt_op_update(ddt->ddt_os, | |
202 | ddt->ddt_object[type][class], dde, tx)); | |
203 | } | |
204 | ||
205 | static int | |
206 | ddt_object_remove(ddt_t *ddt, enum ddt_type type, enum ddt_class class, | |
207 | ddt_entry_t *dde, dmu_tx_t *tx) | |
208 | { | |
209 | ASSERT(ddt_object_exists(ddt, type, class)); | |
210 | ||
211 | return (ddt_ops[type]->ddt_op_remove(ddt->ddt_os, | |
212 | ddt->ddt_object[type][class], dde, tx)); | |
213 | } | |
214 | ||
215 | int | |
216 | ddt_object_walk(ddt_t *ddt, enum ddt_type type, enum ddt_class class, | |
217 | uint64_t *walk, ddt_entry_t *dde) | |
218 | { | |
219 | ASSERT(ddt_object_exists(ddt, type, class)); | |
220 | ||
221 | return (ddt_ops[type]->ddt_op_walk(ddt->ddt_os, | |
222 | ddt->ddt_object[type][class], dde, walk)); | |
223 | } | |
224 | ||
e8fd45a0 BB |
225 | int |
226 | ddt_object_count(ddt_t *ddt, enum ddt_type type, enum ddt_class class, | |
227 | uint64_t *count) | |
428870ff BB |
228 | { |
229 | ASSERT(ddt_object_exists(ddt, type, class)); | |
230 | ||
231 | return (ddt_ops[type]->ddt_op_count(ddt->ddt_os, | |
e8fd45a0 | 232 | ddt->ddt_object[type][class], count)); |
428870ff BB |
233 | } |
234 | ||
235 | int | |
236 | ddt_object_info(ddt_t *ddt, enum ddt_type type, enum ddt_class class, | |
237 | dmu_object_info_t *doi) | |
238 | { | |
239 | if (!ddt_object_exists(ddt, type, class)) | |
2e528b49 | 240 | return (SET_ERROR(ENOENT)); |
428870ff BB |
241 | |
242 | return (dmu_object_info(ddt->ddt_os, ddt->ddt_object[type][class], | |
243 | doi)); | |
244 | } | |
245 | ||
246 | boolean_t | |
247 | ddt_object_exists(ddt_t *ddt, enum ddt_type type, enum ddt_class class) | |
248 | { | |
249 | return (!!ddt->ddt_object[type][class]); | |
250 | } | |
251 | ||
252 | void | |
253 | ddt_object_name(ddt_t *ddt, enum ddt_type type, enum ddt_class class, | |
254 | char *name) | |
255 | { | |
256 | (void) sprintf(name, DMU_POOL_DDT, | |
257 | zio_checksum_table[ddt->ddt_checksum].ci_name, | |
258 | ddt_ops[type]->ddt_op_name, ddt_class_name[class]); | |
259 | } | |
260 | ||
261 | void | |
262 | ddt_bp_fill(const ddt_phys_t *ddp, blkptr_t *bp, uint64_t txg) | |
263 | { | |
264 | ASSERT(txg != 0); | |
265 | ||
1c27024e | 266 | for (int d = 0; d < SPA_DVAS_PER_BP; d++) |
428870ff BB |
267 | bp->blk_dva[d] = ddp->ddp_dva[d]; |
268 | BP_SET_BIRTH(bp, txg, ddp->ddp_phys_birth); | |
269 | } | |
270 | ||
b5256303 TC |
271 | /* |
272 | * The bp created via this function may be used for repairs and scrub, but it | |
273 | * will be missing the salt / IV required to do a full decrypting read. | |
274 | */ | |
428870ff BB |
275 | void |
276 | ddt_bp_create(enum zio_checksum checksum, | |
277 | const ddt_key_t *ddk, const ddt_phys_t *ddp, blkptr_t *bp) | |
278 | { | |
279 | BP_ZERO(bp); | |
280 | ||
281 | if (ddp != NULL) | |
282 | ddt_bp_fill(ddp, bp, ddp->ddp_phys_birth); | |
283 | ||
284 | bp->blk_cksum = ddk->ddk_cksum; | |
428870ff BB |
285 | |
286 | BP_SET_LSIZE(bp, DDK_GET_LSIZE(ddk)); | |
287 | BP_SET_PSIZE(bp, DDK_GET_PSIZE(ddk)); | |
288 | BP_SET_COMPRESS(bp, DDK_GET_COMPRESS(ddk)); | |
b5256303 TC |
289 | BP_SET_CRYPT(bp, DDK_GET_CRYPT(ddk)); |
290 | BP_SET_FILL(bp, 1); | |
428870ff BB |
291 | BP_SET_CHECKSUM(bp, checksum); |
292 | BP_SET_TYPE(bp, DMU_OT_DEDUP); | |
293 | BP_SET_LEVEL(bp, 0); | |
294 | BP_SET_DEDUP(bp, 0); | |
295 | BP_SET_BYTEORDER(bp, ZFS_HOST_BYTEORDER); | |
296 | } | |
297 | ||
298 | void | |
299 | ddt_key_fill(ddt_key_t *ddk, const blkptr_t *bp) | |
300 | { | |
301 | ddk->ddk_cksum = bp->blk_cksum; | |
302 | ddk->ddk_prop = 0; | |
303 | ||
b5256303 TC |
304 | ASSERT(BP_IS_ENCRYPTED(bp) || !BP_USES_CRYPT(bp)); |
305 | ||
428870ff BB |
306 | DDK_SET_LSIZE(ddk, BP_GET_LSIZE(bp)); |
307 | DDK_SET_PSIZE(ddk, BP_GET_PSIZE(bp)); | |
308 | DDK_SET_COMPRESS(ddk, BP_GET_COMPRESS(bp)); | |
b5256303 | 309 | DDK_SET_CRYPT(ddk, BP_USES_CRYPT(bp)); |
428870ff BB |
310 | } |
311 | ||
312 | void | |
313 | ddt_phys_fill(ddt_phys_t *ddp, const blkptr_t *bp) | |
314 | { | |
315 | ASSERT(ddp->ddp_phys_birth == 0); | |
316 | ||
1c27024e | 317 | for (int d = 0; d < SPA_DVAS_PER_BP; d++) |
428870ff BB |
318 | ddp->ddp_dva[d] = bp->blk_dva[d]; |
319 | ddp->ddp_phys_birth = BP_PHYSICAL_BIRTH(bp); | |
320 | } | |
321 | ||
322 | void | |
323 | ddt_phys_clear(ddt_phys_t *ddp) | |
324 | { | |
325 | bzero(ddp, sizeof (*ddp)); | |
326 | } | |
327 | ||
328 | void | |
329 | ddt_phys_addref(ddt_phys_t *ddp) | |
330 | { | |
331 | ddp->ddp_refcnt++; | |
332 | } | |
333 | ||
334 | void | |
335 | ddt_phys_decref(ddt_phys_t *ddp) | |
336 | { | |
5dc6af0e | 337 | if (ddp) { |
ee664d46 | 338 | ASSERT(ddp->ddp_refcnt > 0); |
5dc6af0e BB |
339 | ddp->ddp_refcnt--; |
340 | } | |
428870ff BB |
341 | } |
342 | ||
343 | void | |
344 | ddt_phys_free(ddt_t *ddt, ddt_key_t *ddk, ddt_phys_t *ddp, uint64_t txg) | |
345 | { | |
346 | blkptr_t blk; | |
347 | ||
348 | ddt_bp_create(ddt->ddt_checksum, ddk, ddp, &blk); | |
349 | ddt_phys_clear(ddp); | |
350 | zio_free(ddt->ddt_spa, txg, &blk); | |
351 | } | |
352 | ||
353 | ddt_phys_t * | |
354 | ddt_phys_select(const ddt_entry_t *dde, const blkptr_t *bp) | |
355 | { | |
356 | ddt_phys_t *ddp = (ddt_phys_t *)dde->dde_phys; | |
357 | ||
1c27024e | 358 | for (int p = 0; p < DDT_PHYS_TYPES; p++, ddp++) { |
428870ff BB |
359 | if (DVA_EQUAL(BP_IDENTITY(bp), &ddp->ddp_dva[0]) && |
360 | BP_PHYSICAL_BIRTH(bp) == ddp->ddp_phys_birth) | |
361 | return (ddp); | |
362 | } | |
363 | return (NULL); | |
364 | } | |
365 | ||
366 | uint64_t | |
367 | ddt_phys_total_refcnt(const ddt_entry_t *dde) | |
368 | { | |
369 | uint64_t refcnt = 0; | |
370 | ||
1c27024e | 371 | for (int p = DDT_PHYS_SINGLE; p <= DDT_PHYS_TRIPLE; p++) |
428870ff BB |
372 | refcnt += dde->dde_phys[p].ddp_refcnt; |
373 | ||
374 | return (refcnt); | |
375 | } | |
376 | ||
377 | static void | |
378 | ddt_stat_generate(ddt_t *ddt, ddt_entry_t *dde, ddt_stat_t *dds) | |
379 | { | |
380 | spa_t *spa = ddt->ddt_spa; | |
381 | ddt_phys_t *ddp = dde->dde_phys; | |
382 | ddt_key_t *ddk = &dde->dde_key; | |
383 | uint64_t lsize = DDK_GET_LSIZE(ddk); | |
384 | uint64_t psize = DDK_GET_PSIZE(ddk); | |
385 | ||
386 | bzero(dds, sizeof (*dds)); | |
387 | ||
1c27024e | 388 | for (int p = 0; p < DDT_PHYS_TYPES; p++, ddp++) { |
428870ff BB |
389 | uint64_t dsize = 0; |
390 | uint64_t refcnt = ddp->ddp_refcnt; | |
391 | ||
392 | if (ddp->ddp_phys_birth == 0) | |
393 | continue; | |
394 | ||
1c27024e | 395 | for (int d = 0; d < DDE_GET_NDVAS(dde); d++) |
428870ff BB |
396 | dsize += dva_get_dsize_sync(spa, &ddp->ddp_dva[d]); |
397 | ||
398 | dds->dds_blocks += 1; | |
399 | dds->dds_lsize += lsize; | |
400 | dds->dds_psize += psize; | |
401 | dds->dds_dsize += dsize; | |
402 | ||
403 | dds->dds_ref_blocks += refcnt; | |
404 | dds->dds_ref_lsize += lsize * refcnt; | |
405 | dds->dds_ref_psize += psize * refcnt; | |
406 | dds->dds_ref_dsize += dsize * refcnt; | |
407 | } | |
408 | } | |
409 | ||
410 | void | |
411 | ddt_stat_add(ddt_stat_t *dst, const ddt_stat_t *src, uint64_t neg) | |
412 | { | |
413 | const uint64_t *s = (const uint64_t *)src; | |
414 | uint64_t *d = (uint64_t *)dst; | |
415 | uint64_t *d_end = (uint64_t *)(dst + 1); | |
416 | ||
417 | ASSERT(neg == 0 || neg == -1ULL); /* add or subtract */ | |
418 | ||
419 | while (d < d_end) | |
420 | *d++ += (*s++ ^ neg) - neg; | |
421 | } | |
422 | ||
423 | static void | |
424 | ddt_stat_update(ddt_t *ddt, ddt_entry_t *dde, uint64_t neg) | |
425 | { | |
426 | ddt_stat_t dds; | |
427 | ddt_histogram_t *ddh; | |
428 | int bucket; | |
429 | ||
430 | ddt_stat_generate(ddt, dde, &dds); | |
431 | ||
9bd274dd | 432 | bucket = highbit64(dds.dds_ref_blocks) - 1; |
428870ff BB |
433 | ASSERT(bucket >= 0); |
434 | ||
435 | ddh = &ddt->ddt_histogram[dde->dde_type][dde->dde_class]; | |
436 | ||
437 | ddt_stat_add(&ddh->ddh_stat[bucket], &dds, neg); | |
438 | } | |
439 | ||
440 | void | |
441 | ddt_histogram_add(ddt_histogram_t *dst, const ddt_histogram_t *src) | |
442 | { | |
1c27024e | 443 | for (int h = 0; h < 64; h++) |
428870ff BB |
444 | ddt_stat_add(&dst->ddh_stat[h], &src->ddh_stat[h], 0); |
445 | } | |
446 | ||
447 | void | |
448 | ddt_histogram_stat(ddt_stat_t *dds, const ddt_histogram_t *ddh) | |
449 | { | |
450 | bzero(dds, sizeof (*dds)); | |
451 | ||
1c27024e | 452 | for (int h = 0; h < 64; h++) |
428870ff BB |
453 | ddt_stat_add(dds, &ddh->ddh_stat[h], 0); |
454 | } | |
455 | ||
456 | boolean_t | |
457 | ddt_histogram_empty(const ddt_histogram_t *ddh) | |
458 | { | |
459 | const uint64_t *s = (const uint64_t *)ddh; | |
460 | const uint64_t *s_end = (const uint64_t *)(ddh + 1); | |
461 | ||
462 | while (s < s_end) | |
463 | if (*s++ != 0) | |
464 | return (B_FALSE); | |
465 | ||
466 | return (B_TRUE); | |
467 | } | |
468 | ||
469 | void | |
470 | ddt_get_dedup_object_stats(spa_t *spa, ddt_object_t *ddo_total) | |
471 | { | |
472 | /* Sum the statistics we cached in ddt_object_sync(). */ | |
1c27024e | 473 | for (enum zio_checksum c = 0; c < ZIO_CHECKSUM_FUNCTIONS; c++) { |
428870ff | 474 | ddt_t *ddt = spa->spa_ddt[c]; |
1c27024e DB |
475 | for (enum ddt_type type = 0; type < DDT_TYPES; type++) { |
476 | for (enum ddt_class class = 0; class < DDT_CLASSES; | |
428870ff BB |
477 | class++) { |
478 | ddt_object_t *ddo = | |
479 | &ddt->ddt_object_stats[type][class]; | |
480 | ddo_total->ddo_count += ddo->ddo_count; | |
481 | ddo_total->ddo_dspace += ddo->ddo_dspace; | |
482 | ddo_total->ddo_mspace += ddo->ddo_mspace; | |
483 | } | |
484 | } | |
485 | } | |
486 | ||
487 | /* ... and compute the averages. */ | |
488 | if (ddo_total->ddo_count != 0) { | |
489 | ddo_total->ddo_dspace /= ddo_total->ddo_count; | |
490 | ddo_total->ddo_mspace /= ddo_total->ddo_count; | |
428870ff BB |
491 | } |
492 | } | |
493 | ||
494 | void | |
495 | ddt_get_dedup_histogram(spa_t *spa, ddt_histogram_t *ddh) | |
496 | { | |
1c27024e | 497 | for (enum zio_checksum c = 0; c < ZIO_CHECKSUM_FUNCTIONS; c++) { |
428870ff | 498 | ddt_t *ddt = spa->spa_ddt[c]; |
1c27024e DB |
499 | for (enum ddt_type type = 0; type < DDT_TYPES; type++) { |
500 | for (enum ddt_class class = 0; class < DDT_CLASSES; | |
428870ff BB |
501 | class++) { |
502 | ddt_histogram_add(ddh, | |
503 | &ddt->ddt_histogram_cache[type][class]); | |
504 | } | |
505 | } | |
506 | } | |
507 | } | |
508 | ||
509 | void | |
510 | ddt_get_dedup_stats(spa_t *spa, ddt_stat_t *dds_total) | |
511 | { | |
512 | ddt_histogram_t *ddh_total; | |
513 | ||
79c76d5b | 514 | ddh_total = kmem_zalloc(sizeof (ddt_histogram_t), KM_SLEEP); |
428870ff BB |
515 | ddt_get_dedup_histogram(spa, ddh_total); |
516 | ddt_histogram_stat(dds_total, ddh_total); | |
517 | kmem_free(ddh_total, sizeof (ddt_histogram_t)); | |
518 | } | |
519 | ||
520 | uint64_t | |
521 | ddt_get_dedup_dspace(spa_t *spa) | |
522 | { | |
e8a20144 GN |
523 | ddt_stat_t dds_total; |
524 | ||
525 | if (spa->spa_dedup_dspace != ~0ULL) | |
526 | return (spa->spa_dedup_dspace); | |
527 | ||
528 | bzero(&dds_total, sizeof (ddt_stat_t)); | |
428870ff | 529 | |
e8a20144 | 530 | /* Calculate and cache the stats */ |
428870ff | 531 | ddt_get_dedup_stats(spa, &dds_total); |
e8a20144 GN |
532 | spa->spa_dedup_dspace = dds_total.dds_ref_dsize - dds_total.dds_dsize; |
533 | return (spa->spa_dedup_dspace); | |
428870ff BB |
534 | } |
535 | ||
536 | uint64_t | |
537 | ddt_get_pool_dedup_ratio(spa_t *spa) | |
538 | { | |
539 | ddt_stat_t dds_total = { 0 }; | |
540 | ||
541 | ddt_get_dedup_stats(spa, &dds_total); | |
542 | if (dds_total.dds_dsize == 0) | |
543 | return (100); | |
544 | ||
545 | return (dds_total.dds_ref_dsize * 100 / dds_total.dds_dsize); | |
546 | } | |
547 | ||
548 | int | |
549 | ddt_ditto_copies_needed(ddt_t *ddt, ddt_entry_t *dde, ddt_phys_t *ddp_willref) | |
550 | { | |
551 | spa_t *spa = ddt->ddt_spa; | |
552 | uint64_t total_refcnt = 0; | |
553 | uint64_t ditto = spa->spa_dedup_ditto; | |
554 | int total_copies = 0; | |
555 | int desired_copies = 0; | |
b5256303 | 556 | int copies_needed = 0; |
428870ff | 557 | |
1c27024e | 558 | for (int p = DDT_PHYS_SINGLE; p <= DDT_PHYS_TRIPLE; p++) { |
428870ff BB |
559 | ddt_phys_t *ddp = &dde->dde_phys[p]; |
560 | zio_t *zio = dde->dde_lead_zio[p]; | |
561 | uint64_t refcnt = ddp->ddp_refcnt; /* committed refs */ | |
562 | if (zio != NULL) | |
563 | refcnt += zio->io_parent_count; /* pending refs */ | |
564 | if (ddp == ddp_willref) | |
565 | refcnt++; /* caller's ref */ | |
566 | if (refcnt != 0) { | |
567 | total_refcnt += refcnt; | |
568 | total_copies += p; | |
569 | } | |
570 | } | |
571 | ||
572 | if (ditto == 0 || ditto > UINT32_MAX) | |
573 | ditto = UINT32_MAX; | |
574 | ||
575 | if (total_refcnt >= 1) | |
576 | desired_copies++; | |
577 | if (total_refcnt >= ditto) | |
578 | desired_copies++; | |
579 | if (total_refcnt >= ditto * ditto) | |
580 | desired_copies++; | |
581 | ||
b5256303 TC |
582 | copies_needed = MAX(desired_copies, total_copies) - total_copies; |
583 | ||
584 | /* encrypted blocks store their IV in DVA[2] */ | |
585 | if (DDK_GET_CRYPT(&dde->dde_key)) | |
586 | copies_needed = MIN(copies_needed, SPA_DVAS_PER_BP - 1); | |
587 | ||
588 | return (copies_needed); | |
428870ff BB |
589 | } |
590 | ||
591 | int | |
592 | ddt_ditto_copies_present(ddt_entry_t *dde) | |
593 | { | |
594 | ddt_phys_t *ddp = &dde->dde_phys[DDT_PHYS_DITTO]; | |
595 | dva_t *dva = ddp->ddp_dva; | |
596 | int copies = 0 - DVA_GET_GANG(dva); | |
597 | ||
1c27024e | 598 | for (int d = 0; d < DDE_GET_NDVAS(dde); d++, dva++) |
428870ff BB |
599 | if (DVA_IS_VALID(dva)) |
600 | copies++; | |
601 | ||
602 | ASSERT(copies >= 0 && copies < SPA_DVAS_PER_BP); | |
603 | ||
604 | return (copies); | |
605 | } | |
606 | ||
607 | size_t | |
608 | ddt_compress(void *src, uchar_t *dst, size_t s_len, size_t d_len) | |
609 | { | |
610 | uchar_t *version = dst++; | |
611 | int cpfunc = ZIO_COMPRESS_ZLE; | |
612 | zio_compress_info_t *ci = &zio_compress_table[cpfunc]; | |
613 | size_t c_len; | |
614 | ||
615 | ASSERT(d_len >= s_len + 1); /* no compression plus version byte */ | |
616 | ||
617 | c_len = ci->ci_compress(src, dst, s_len, d_len - 1, ci->ci_level); | |
618 | ||
619 | if (c_len == s_len) { | |
620 | cpfunc = ZIO_COMPRESS_OFF; | |
621 | bcopy(src, dst, s_len); | |
622 | } | |
623 | ||
b0bc7a84 MG |
624 | *version = cpfunc; |
625 | /* CONSTCOND */ | |
626 | if (ZFS_HOST_BYTEORDER) | |
627 | *version |= DDT_COMPRESS_BYTEORDER_MASK; | |
428870ff BB |
628 | |
629 | return (c_len + 1); | |
630 | } | |
631 | ||
632 | void | |
633 | ddt_decompress(uchar_t *src, void *dst, size_t s_len, size_t d_len) | |
634 | { | |
635 | uchar_t version = *src++; | |
636 | int cpfunc = version & DDT_COMPRESS_FUNCTION_MASK; | |
637 | zio_compress_info_t *ci = &zio_compress_table[cpfunc]; | |
638 | ||
639 | if (ci->ci_decompress != NULL) | |
640 | (void) ci->ci_decompress(src, dst, s_len, d_len, ci->ci_level); | |
641 | else | |
642 | bcopy(src, dst, d_len); | |
643 | ||
b0bc7a84 MG |
644 | if (((version & DDT_COMPRESS_BYTEORDER_MASK) != 0) != |
645 | (ZFS_HOST_BYTEORDER != 0)) | |
428870ff BB |
646 | byteswap_uint64_array(dst, d_len); |
647 | } | |
648 | ||
649 | ddt_t * | |
650 | ddt_select_by_checksum(spa_t *spa, enum zio_checksum c) | |
651 | { | |
652 | return (spa->spa_ddt[c]); | |
653 | } | |
654 | ||
655 | ddt_t * | |
656 | ddt_select(spa_t *spa, const blkptr_t *bp) | |
657 | { | |
658 | return (spa->spa_ddt[BP_GET_CHECKSUM(bp)]); | |
659 | } | |
660 | ||
661 | void | |
662 | ddt_enter(ddt_t *ddt) | |
663 | { | |
664 | mutex_enter(&ddt->ddt_lock); | |
665 | } | |
666 | ||
667 | void | |
668 | ddt_exit(ddt_t *ddt) | |
669 | { | |
670 | mutex_exit(&ddt->ddt_lock); | |
671 | } | |
672 | ||
ecf3d9b8 JL |
673 | void |
674 | ddt_init(void) | |
675 | { | |
676 | ddt_cache = kmem_cache_create("ddt_cache", | |
677 | sizeof (ddt_t), 0, NULL, NULL, NULL, NULL, NULL, 0); | |
678 | ddt_entry_cache = kmem_cache_create("ddt_entry_cache", | |
679 | sizeof (ddt_entry_t), 0, NULL, NULL, NULL, NULL, NULL, 0); | |
680 | } | |
681 | ||
682 | void | |
683 | ddt_fini(void) | |
684 | { | |
685 | kmem_cache_destroy(ddt_entry_cache); | |
686 | kmem_cache_destroy(ddt_cache); | |
687 | } | |
688 | ||
428870ff BB |
689 | static ddt_entry_t * |
690 | ddt_alloc(const ddt_key_t *ddk) | |
691 | { | |
692 | ddt_entry_t *dde; | |
693 | ||
79c76d5b | 694 | dde = kmem_cache_alloc(ddt_entry_cache, KM_SLEEP); |
ecf3d9b8 | 695 | bzero(dde, sizeof (ddt_entry_t)); |
428870ff BB |
696 | cv_init(&dde->dde_cv, NULL, CV_DEFAULT, NULL); |
697 | ||
698 | dde->dde_key = *ddk; | |
699 | ||
700 | return (dde); | |
701 | } | |
702 | ||
703 | static void | |
704 | ddt_free(ddt_entry_t *dde) | |
705 | { | |
706 | ASSERT(!dde->dde_loading); | |
707 | ||
1c27024e | 708 | for (int p = 0; p < DDT_PHYS_TYPES; p++) |
428870ff BB |
709 | ASSERT(dde->dde_lead_zio[p] == NULL); |
710 | ||
a6255b7f DQ |
711 | if (dde->dde_repair_abd != NULL) |
712 | abd_free(dde->dde_repair_abd); | |
428870ff BB |
713 | |
714 | cv_destroy(&dde->dde_cv); | |
ecf3d9b8 | 715 | kmem_cache_free(ddt_entry_cache, dde); |
428870ff BB |
716 | } |
717 | ||
718 | void | |
719 | ddt_remove(ddt_t *ddt, ddt_entry_t *dde) | |
720 | { | |
721 | ASSERT(MUTEX_HELD(&ddt->ddt_lock)); | |
722 | ||
723 | avl_remove(&ddt->ddt_tree, dde); | |
724 | ddt_free(dde); | |
725 | } | |
726 | ||
727 | ddt_entry_t * | |
728 | ddt_lookup(ddt_t *ddt, const blkptr_t *bp, boolean_t add) | |
729 | { | |
730 | ddt_entry_t *dde, dde_search; | |
731 | enum ddt_type type; | |
732 | enum ddt_class class; | |
733 | avl_index_t where; | |
734 | int error; | |
735 | ||
736 | ASSERT(MUTEX_HELD(&ddt->ddt_lock)); | |
737 | ||
738 | ddt_key_fill(&dde_search.dde_key, bp); | |
739 | ||
740 | dde = avl_find(&ddt->ddt_tree, &dde_search, &where); | |
741 | if (dde == NULL) { | |
742 | if (!add) | |
743 | return (NULL); | |
744 | dde = ddt_alloc(&dde_search.dde_key); | |
745 | avl_insert(&ddt->ddt_tree, dde, where); | |
746 | } | |
747 | ||
748 | while (dde->dde_loading) | |
749 | cv_wait(&dde->dde_cv, &ddt->ddt_lock); | |
750 | ||
751 | if (dde->dde_loaded) | |
752 | return (dde); | |
753 | ||
754 | dde->dde_loading = B_TRUE; | |
755 | ||
756 | ddt_exit(ddt); | |
757 | ||
758 | error = ENOENT; | |
759 | ||
760 | for (type = 0; type < DDT_TYPES; type++) { | |
761 | for (class = 0; class < DDT_CLASSES; class++) { | |
762 | error = ddt_object_lookup(ddt, type, class, dde); | |
763 | if (error != ENOENT) | |
764 | break; | |
765 | } | |
766 | if (error != ENOENT) | |
767 | break; | |
768 | } | |
769 | ||
770 | ASSERT(error == 0 || error == ENOENT); | |
771 | ||
772 | ddt_enter(ddt); | |
773 | ||
774 | ASSERT(dde->dde_loaded == B_FALSE); | |
775 | ASSERT(dde->dde_loading == B_TRUE); | |
776 | ||
777 | dde->dde_type = type; /* will be DDT_TYPES if no entry found */ | |
778 | dde->dde_class = class; /* will be DDT_CLASSES if no entry found */ | |
779 | dde->dde_loaded = B_TRUE; | |
780 | dde->dde_loading = B_FALSE; | |
781 | ||
782 | if (error == 0) | |
783 | ddt_stat_update(ddt, dde, -1ULL); | |
784 | ||
785 | cv_broadcast(&dde->dde_cv); | |
786 | ||
787 | return (dde); | |
788 | } | |
789 | ||
790 | void | |
791 | ddt_prefetch(spa_t *spa, const blkptr_t *bp) | |
792 | { | |
793 | ddt_t *ddt; | |
794 | ddt_entry_t dde; | |
795 | ||
572e2857 | 796 | if (!zfs_dedup_prefetch || bp == NULL || !BP_GET_DEDUP(bp)) |
428870ff BB |
797 | return; |
798 | ||
799 | /* | |
572e2857 BB |
800 | * We only remove the DDT once all tables are empty and only |
801 | * prefetch dedup blocks when there are entries in the DDT. | |
802 | * Thus no locking is required as the DDT can't disappear on us. | |
428870ff BB |
803 | */ |
804 | ddt = ddt_select(spa, bp); | |
805 | ddt_key_fill(&dde.dde_key, bp); | |
806 | ||
1c27024e DB |
807 | for (enum ddt_type type = 0; type < DDT_TYPES; type++) { |
808 | for (enum ddt_class class = 0; class < DDT_CLASSES; class++) { | |
428870ff BB |
809 | ddt_object_prefetch(ddt, type, class, &dde); |
810 | } | |
811 | } | |
812 | } | |
813 | ||
ee36c709 GN |
814 | /* |
815 | * Opaque struct used for ddt_key comparison | |
816 | */ | |
817 | #define DDT_KEY_CMP_LEN (sizeof (ddt_key_t) / sizeof (uint16_t)) | |
818 | ||
819 | typedef struct ddt_key_cmp { | |
820 | uint16_t u16[DDT_KEY_CMP_LEN]; | |
821 | } ddt_key_cmp_t; | |
822 | ||
428870ff BB |
823 | int |
824 | ddt_entry_compare(const void *x1, const void *x2) | |
825 | { | |
826 | const ddt_entry_t *dde1 = x1; | |
827 | const ddt_entry_t *dde2 = x2; | |
ee36c709 GN |
828 | const ddt_key_cmp_t *k1 = (const ddt_key_cmp_t *)&dde1->dde_key; |
829 | const ddt_key_cmp_t *k2 = (const ddt_key_cmp_t *)&dde2->dde_key; | |
830 | int32_t cmp = 0; | |
428870ff | 831 | |
1c27024e | 832 | for (int i = 0; i < DDT_KEY_CMP_LEN; i++) { |
ee36c709 GN |
833 | cmp = (int32_t)k1->u16[i] - (int32_t)k2->u16[i]; |
834 | if (likely(cmp)) | |
835 | break; | |
428870ff BB |
836 | } |
837 | ||
ee36c709 | 838 | return (AVL_ISIGN(cmp)); |
428870ff BB |
839 | } |
840 | ||
841 | static ddt_t * | |
842 | ddt_table_alloc(spa_t *spa, enum zio_checksum c) | |
843 | { | |
844 | ddt_t *ddt; | |
845 | ||
79c76d5b | 846 | ddt = kmem_cache_alloc(ddt_cache, KM_SLEEP); |
ecf3d9b8 | 847 | bzero(ddt, sizeof (ddt_t)); |
428870ff BB |
848 | |
849 | mutex_init(&ddt->ddt_lock, NULL, MUTEX_DEFAULT, NULL); | |
850 | avl_create(&ddt->ddt_tree, ddt_entry_compare, | |
851 | sizeof (ddt_entry_t), offsetof(ddt_entry_t, dde_node)); | |
852 | avl_create(&ddt->ddt_repair_tree, ddt_entry_compare, | |
853 | sizeof (ddt_entry_t), offsetof(ddt_entry_t, dde_node)); | |
854 | ddt->ddt_checksum = c; | |
855 | ddt->ddt_spa = spa; | |
856 | ddt->ddt_os = spa->spa_meta_objset; | |
857 | ||
858 | return (ddt); | |
859 | } | |
860 | ||
861 | static void | |
862 | ddt_table_free(ddt_t *ddt) | |
863 | { | |
864 | ASSERT(avl_numnodes(&ddt->ddt_tree) == 0); | |
865 | ASSERT(avl_numnodes(&ddt->ddt_repair_tree) == 0); | |
866 | avl_destroy(&ddt->ddt_tree); | |
867 | avl_destroy(&ddt->ddt_repair_tree); | |
868 | mutex_destroy(&ddt->ddt_lock); | |
ecf3d9b8 | 869 | kmem_cache_free(ddt_cache, ddt); |
428870ff BB |
870 | } |
871 | ||
872 | void | |
873 | ddt_create(spa_t *spa) | |
874 | { | |
875 | spa->spa_dedup_checksum = ZIO_DEDUPCHECKSUM; | |
876 | ||
1c27024e | 877 | for (enum zio_checksum c = 0; c < ZIO_CHECKSUM_FUNCTIONS; c++) |
428870ff BB |
878 | spa->spa_ddt[c] = ddt_table_alloc(spa, c); |
879 | } | |
880 | ||
881 | int | |
882 | ddt_load(spa_t *spa) | |
883 | { | |
884 | int error; | |
885 | ||
886 | ddt_create(spa); | |
887 | ||
888 | error = zap_lookup(spa->spa_meta_objset, DMU_POOL_DIRECTORY_OBJECT, | |
889 | DMU_POOL_DDT_STATS, sizeof (uint64_t), 1, | |
890 | &spa->spa_ddt_stat_object); | |
891 | ||
892 | if (error) | |
893 | return (error == ENOENT ? 0 : error); | |
894 | ||
1c27024e | 895 | for (enum zio_checksum c = 0; c < ZIO_CHECKSUM_FUNCTIONS; c++) { |
428870ff | 896 | ddt_t *ddt = spa->spa_ddt[c]; |
1c27024e DB |
897 | for (enum ddt_type type = 0; type < DDT_TYPES; type++) { |
898 | for (enum ddt_class class = 0; class < DDT_CLASSES; | |
428870ff BB |
899 | class++) { |
900 | error = ddt_object_load(ddt, type, class); | |
901 | if (error != 0 && error != ENOENT) | |
902 | return (error); | |
903 | } | |
904 | } | |
905 | ||
906 | /* | |
907 | * Seed the cached histograms. | |
908 | */ | |
909 | bcopy(ddt->ddt_histogram, &ddt->ddt_histogram_cache, | |
910 | sizeof (ddt->ddt_histogram)); | |
e8a20144 | 911 | spa->spa_dedup_dspace = ~0ULL; |
428870ff BB |
912 | } |
913 | ||
914 | return (0); | |
915 | } | |
916 | ||
917 | void | |
918 | ddt_unload(spa_t *spa) | |
919 | { | |
1c27024e | 920 | for (enum zio_checksum c = 0; c < ZIO_CHECKSUM_FUNCTIONS; c++) { |
428870ff BB |
921 | if (spa->spa_ddt[c]) { |
922 | ddt_table_free(spa->spa_ddt[c]); | |
923 | spa->spa_ddt[c] = NULL; | |
924 | } | |
925 | } | |
926 | } | |
927 | ||
928 | boolean_t | |
929 | ddt_class_contains(spa_t *spa, enum ddt_class max_class, const blkptr_t *bp) | |
930 | { | |
931 | ddt_t *ddt; | |
e95b3bdc | 932 | ddt_entry_t *dde; |
428870ff BB |
933 | |
934 | if (!BP_GET_DEDUP(bp)) | |
935 | return (B_FALSE); | |
936 | ||
937 | if (max_class == DDT_CLASS_UNIQUE) | |
938 | return (B_TRUE); | |
939 | ||
940 | ddt = spa->spa_ddt[BP_GET_CHECKSUM(bp)]; | |
79c76d5b | 941 | dde = kmem_cache_alloc(ddt_entry_cache, KM_SLEEP); |
428870ff | 942 | |
e95b3bdc | 943 | ddt_key_fill(&(dde->dde_key), bp); |
428870ff | 944 | |
1c27024e DB |
945 | for (enum ddt_type type = 0; type < DDT_TYPES; type++) { |
946 | for (enum ddt_class class = 0; class <= max_class; class++) { | |
e95b3bdc | 947 | if (ddt_object_lookup(ddt, type, class, dde) == 0) { |
ecf3d9b8 | 948 | kmem_cache_free(ddt_entry_cache, dde); |
428870ff | 949 | return (B_TRUE); |
e95b3bdc BB |
950 | } |
951 | } | |
952 | } | |
428870ff | 953 | |
ecf3d9b8 | 954 | kmem_cache_free(ddt_entry_cache, dde); |
428870ff BB |
955 | return (B_FALSE); |
956 | } | |
957 | ||
958 | ddt_entry_t * | |
959 | ddt_repair_start(ddt_t *ddt, const blkptr_t *bp) | |
960 | { | |
961 | ddt_key_t ddk; | |
962 | ddt_entry_t *dde; | |
963 | ||
964 | ddt_key_fill(&ddk, bp); | |
965 | ||
966 | dde = ddt_alloc(&ddk); | |
967 | ||
1c27024e DB |
968 | for (enum ddt_type type = 0; type < DDT_TYPES; type++) { |
969 | for (enum ddt_class class = 0; class < DDT_CLASSES; class++) { | |
428870ff BB |
970 | /* |
971 | * We can only do repair if there are multiple copies | |
972 | * of the block. For anything in the UNIQUE class, | |
973 | * there's definitely only one copy, so don't even try. | |
974 | */ | |
975 | if (class != DDT_CLASS_UNIQUE && | |
976 | ddt_object_lookup(ddt, type, class, dde) == 0) | |
977 | return (dde); | |
978 | } | |
979 | } | |
980 | ||
981 | bzero(dde->dde_phys, sizeof (dde->dde_phys)); | |
982 | ||
983 | return (dde); | |
984 | } | |
985 | ||
986 | void | |
987 | ddt_repair_done(ddt_t *ddt, ddt_entry_t *dde) | |
988 | { | |
989 | avl_index_t where; | |
990 | ||
991 | ddt_enter(ddt); | |
992 | ||
a6255b7f | 993 | if (dde->dde_repair_abd != NULL && spa_writeable(ddt->ddt_spa) && |
428870ff BB |
994 | avl_find(&ddt->ddt_repair_tree, dde, &where) == NULL) |
995 | avl_insert(&ddt->ddt_repair_tree, dde, where); | |
996 | else | |
997 | ddt_free(dde); | |
998 | ||
999 | ddt_exit(ddt); | |
1000 | } | |
1001 | ||
1002 | static void | |
1003 | ddt_repair_entry_done(zio_t *zio) | |
1004 | { | |
1005 | ddt_entry_t *rdde = zio->io_private; | |
1006 | ||
1007 | ddt_free(rdde); | |
1008 | } | |
1009 | ||
1010 | static void | |
1011 | ddt_repair_entry(ddt_t *ddt, ddt_entry_t *dde, ddt_entry_t *rdde, zio_t *rio) | |
1012 | { | |
1013 | ddt_phys_t *ddp = dde->dde_phys; | |
1014 | ddt_phys_t *rddp = rdde->dde_phys; | |
1015 | ddt_key_t *ddk = &dde->dde_key; | |
1016 | ddt_key_t *rddk = &rdde->dde_key; | |
1017 | zio_t *zio; | |
1018 | blkptr_t blk; | |
1019 | ||
1020 | zio = zio_null(rio, rio->io_spa, NULL, | |
1021 | ddt_repair_entry_done, rdde, rio->io_flags); | |
1022 | ||
1c27024e | 1023 | for (int p = 0; p < DDT_PHYS_TYPES; p++, ddp++, rddp++) { |
428870ff BB |
1024 | if (ddp->ddp_phys_birth == 0 || |
1025 | ddp->ddp_phys_birth != rddp->ddp_phys_birth || | |
1026 | bcmp(ddp->ddp_dva, rddp->ddp_dva, sizeof (ddp->ddp_dva))) | |
1027 | continue; | |
1028 | ddt_bp_create(ddt->ddt_checksum, ddk, ddp, &blk); | |
1029 | zio_nowait(zio_rewrite(zio, zio->io_spa, 0, &blk, | |
a6255b7f | 1030 | rdde->dde_repair_abd, DDK_GET_PSIZE(rddk), NULL, NULL, |
428870ff BB |
1031 | ZIO_PRIORITY_SYNC_WRITE, ZIO_DDT_CHILD_FLAGS(zio), NULL)); |
1032 | } | |
1033 | ||
1034 | zio_nowait(zio); | |
1035 | } | |
1036 | ||
1037 | static void | |
1038 | ddt_repair_table(ddt_t *ddt, zio_t *rio) | |
1039 | { | |
1040 | spa_t *spa = ddt->ddt_spa; | |
1041 | ddt_entry_t *dde, *rdde_next, *rdde; | |
1042 | avl_tree_t *t = &ddt->ddt_repair_tree; | |
1043 | blkptr_t blk; | |
1044 | ||
1045 | if (spa_sync_pass(spa) > 1) | |
1046 | return; | |
1047 | ||
1048 | ddt_enter(ddt); | |
1049 | for (rdde = avl_first(t); rdde != NULL; rdde = rdde_next) { | |
1050 | rdde_next = AVL_NEXT(t, rdde); | |
1051 | avl_remove(&ddt->ddt_repair_tree, rdde); | |
1052 | ddt_exit(ddt); | |
1053 | ddt_bp_create(ddt->ddt_checksum, &rdde->dde_key, NULL, &blk); | |
1054 | dde = ddt_repair_start(ddt, &blk); | |
1055 | ddt_repair_entry(ddt, dde, rdde, rio); | |
1056 | ddt_repair_done(ddt, dde); | |
1057 | ddt_enter(ddt); | |
1058 | } | |
1059 | ddt_exit(ddt); | |
1060 | } | |
1061 | ||
1062 | static void | |
1063 | ddt_sync_entry(ddt_t *ddt, ddt_entry_t *dde, dmu_tx_t *tx, uint64_t txg) | |
1064 | { | |
1065 | dsl_pool_t *dp = ddt->ddt_spa->spa_dsl_pool; | |
1066 | ddt_phys_t *ddp = dde->dde_phys; | |
1067 | ddt_key_t *ddk = &dde->dde_key; | |
1068 | enum ddt_type otype = dde->dde_type; | |
1069 | enum ddt_type ntype = DDT_TYPE_CURRENT; | |
1070 | enum ddt_class oclass = dde->dde_class; | |
1071 | enum ddt_class nclass; | |
1072 | uint64_t total_refcnt = 0; | |
1073 | ||
1074 | ASSERT(dde->dde_loaded); | |
1075 | ASSERT(!dde->dde_loading); | |
1076 | ||
1c27024e | 1077 | for (int p = 0; p < DDT_PHYS_TYPES; p++, ddp++) { |
428870ff | 1078 | ASSERT(dde->dde_lead_zio[p] == NULL); |
428870ff BB |
1079 | if (ddp->ddp_phys_birth == 0) { |
1080 | ASSERT(ddp->ddp_refcnt == 0); | |
1081 | continue; | |
1082 | } | |
1083 | if (p == DDT_PHYS_DITTO) { | |
1084 | if (ddt_ditto_copies_needed(ddt, dde, NULL) == 0) | |
1085 | ddt_phys_free(ddt, ddk, ddp, txg); | |
1086 | continue; | |
1087 | } | |
1088 | if (ddp->ddp_refcnt == 0) | |
1089 | ddt_phys_free(ddt, ddk, ddp, txg); | |
1090 | total_refcnt += ddp->ddp_refcnt; | |
1091 | } | |
1092 | ||
1093 | if (dde->dde_phys[DDT_PHYS_DITTO].ddp_phys_birth != 0) | |
1094 | nclass = DDT_CLASS_DITTO; | |
1095 | else if (total_refcnt > 1) | |
1096 | nclass = DDT_CLASS_DUPLICATE; | |
1097 | else | |
1098 | nclass = DDT_CLASS_UNIQUE; | |
1099 | ||
1100 | if (otype != DDT_TYPES && | |
1101 | (otype != ntype || oclass != nclass || total_refcnt == 0)) { | |
1102 | VERIFY(ddt_object_remove(ddt, otype, oclass, dde, tx) == 0); | |
1103 | ASSERT(ddt_object_lookup(ddt, otype, oclass, dde) == ENOENT); | |
1104 | } | |
1105 | ||
1106 | if (total_refcnt != 0) { | |
1107 | dde->dde_type = ntype; | |
1108 | dde->dde_class = nclass; | |
1109 | ddt_stat_update(ddt, dde, 0); | |
1110 | if (!ddt_object_exists(ddt, ntype, nclass)) | |
1111 | ddt_object_create(ddt, ntype, nclass, tx); | |
1112 | VERIFY(ddt_object_update(ddt, ntype, nclass, dde, tx) == 0); | |
1113 | ||
1114 | /* | |
1115 | * If the class changes, the order that we scan this bp | |
1116 | * changes. If it decreases, we could miss it, so | |
1117 | * scan it right now. (This covers both class changing | |
1118 | * while we are doing ddt_walk(), and when we are | |
1119 | * traversing.) | |
1120 | */ | |
1121 | if (nclass < oclass) { | |
1122 | dsl_scan_ddt_entry(dp->dp_scan, | |
1123 | ddt->ddt_checksum, dde, tx); | |
1124 | } | |
1125 | } | |
1126 | } | |
1127 | ||
1128 | static void | |
1129 | ddt_sync_table(ddt_t *ddt, dmu_tx_t *tx, uint64_t txg) | |
1130 | { | |
1131 | spa_t *spa = ddt->ddt_spa; | |
1132 | ddt_entry_t *dde; | |
1133 | void *cookie = NULL; | |
1134 | ||
1135 | if (avl_numnodes(&ddt->ddt_tree) == 0) | |
1136 | return; | |
1137 | ||
1138 | ASSERT(spa->spa_uberblock.ub_version >= SPA_VERSION_DEDUP); | |
1139 | ||
1140 | if (spa->spa_ddt_stat_object == 0) { | |
9ae529ec CS |
1141 | spa->spa_ddt_stat_object = zap_create_link(ddt->ddt_os, |
1142 | DMU_OT_DDT_STATS, DMU_POOL_DIRECTORY_OBJECT, | |
1143 | DMU_POOL_DDT_STATS, tx); | |
428870ff BB |
1144 | } |
1145 | ||
1146 | while ((dde = avl_destroy_nodes(&ddt->ddt_tree, &cookie)) != NULL) { | |
1147 | ddt_sync_entry(ddt, dde, tx, txg); | |
1148 | ddt_free(dde); | |
1149 | } | |
1150 | ||
1c27024e | 1151 | for (enum ddt_type type = 0; type < DDT_TYPES; type++) { |
e8fd45a0 | 1152 | uint64_t add, count = 0; |
1c27024e | 1153 | for (enum ddt_class class = 0; class < DDT_CLASSES; class++) { |
572e2857 BB |
1154 | if (ddt_object_exists(ddt, type, class)) { |
1155 | ddt_object_sync(ddt, type, class, tx); | |
e8fd45a0 BB |
1156 | VERIFY(ddt_object_count(ddt, type, class, |
1157 | &add) == 0); | |
1158 | count += add; | |
572e2857 BB |
1159 | } |
1160 | } | |
1c27024e | 1161 | for (enum ddt_class class = 0; class < DDT_CLASSES; class++) { |
572e2857 | 1162 | if (count == 0 && ddt_object_exists(ddt, type, class)) |
428870ff BB |
1163 | ddt_object_destroy(ddt, type, class, tx); |
1164 | } | |
1165 | } | |
1166 | ||
1167 | bcopy(ddt->ddt_histogram, &ddt->ddt_histogram_cache, | |
1168 | sizeof (ddt->ddt_histogram)); | |
e8a20144 | 1169 | spa->spa_dedup_dspace = ~0ULL; |
428870ff BB |
1170 | } |
1171 | ||
1172 | void | |
1173 | ddt_sync(spa_t *spa, uint64_t txg) | |
1174 | { | |
d4a72f23 | 1175 | dsl_scan_t *scn = spa->spa_dsl_pool->dp_scan; |
428870ff | 1176 | dmu_tx_t *tx; |
d4a72f23 | 1177 | zio_t *rio; |
428870ff BB |
1178 | |
1179 | ASSERT(spa_syncing_txg(spa) == txg); | |
1180 | ||
1181 | tx = dmu_tx_create_assigned(spa->spa_dsl_pool, txg); | |
1182 | ||
d4a72f23 TC |
1183 | rio = zio_root(spa, NULL, NULL, |
1184 | ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE); | |
1185 | ||
1186 | /* | |
1187 | * This function may cause an immediate scan of ddt blocks (see | |
1188 | * the comment above dsl_scan_ddt() for details). We set the | |
1189 | * scan's root zio here so that we can wait for any scan IOs in | |
1190 | * addition to the regular ddt IOs. | |
1191 | */ | |
1192 | ASSERT3P(scn->scn_zio_root, ==, NULL); | |
1193 | scn->scn_zio_root = rio; | |
1194 | ||
1c27024e | 1195 | for (enum zio_checksum c = 0; c < ZIO_CHECKSUM_FUNCTIONS; c++) { |
428870ff BB |
1196 | ddt_t *ddt = spa->spa_ddt[c]; |
1197 | if (ddt == NULL) | |
1198 | continue; | |
1199 | ddt_sync_table(ddt, tx, txg); | |
1200 | ddt_repair_table(ddt, rio); | |
1201 | } | |
1202 | ||
1203 | (void) zio_wait(rio); | |
d4a72f23 | 1204 | scn->scn_zio_root = NULL; |
428870ff BB |
1205 | |
1206 | dmu_tx_commit(tx); | |
1207 | } | |
1208 | ||
1209 | int | |
1210 | ddt_walk(spa_t *spa, ddt_bookmark_t *ddb, ddt_entry_t *dde) | |
1211 | { | |
1212 | do { | |
1213 | do { | |
1214 | do { | |
1215 | ddt_t *ddt = spa->spa_ddt[ddb->ddb_checksum]; | |
1216 | int error = ENOENT; | |
1217 | if (ddt_object_exists(ddt, ddb->ddb_type, | |
1218 | ddb->ddb_class)) { | |
1219 | error = ddt_object_walk(ddt, | |
1220 | ddb->ddb_type, ddb->ddb_class, | |
1221 | &ddb->ddb_cursor, dde); | |
1222 | } | |
1223 | dde->dde_type = ddb->ddb_type; | |
1224 | dde->dde_class = ddb->ddb_class; | |
1225 | if (error == 0) | |
1226 | return (0); | |
1227 | if (error != ENOENT) | |
1228 | return (error); | |
1229 | ddb->ddb_cursor = 0; | |
1230 | } while (++ddb->ddb_checksum < ZIO_CHECKSUM_FUNCTIONS); | |
1231 | ddb->ddb_checksum = 0; | |
1232 | } while (++ddb->ddb_type < DDT_TYPES); | |
1233 | ddb->ddb_type = 0; | |
1234 | } while (++ddb->ddb_class < DDT_CLASSES); | |
1235 | ||
2e528b49 | 1236 | return (SET_ERROR(ENOENT)); |
428870ff | 1237 | } |
c409e464 BB |
1238 | |
1239 | #if defined(_KERNEL) && defined(HAVE_SPL) | |
1240 | module_param(zfs_dedup_prefetch, int, 0644); | |
d1d7e268 | 1241 | MODULE_PARM_DESC(zfs_dedup_prefetch, "Enable prefetching dedup-ed blks"); |
c409e464 | 1242 | #endif |