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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. | |
24 | */ | |
25 | ||
26 | #include <sys/zfs_context.h> | |
27 | #include <sys/spa.h> | |
28 | #include <sys/spa_impl.h> | |
29 | #include <sys/zio.h> | |
30 | #include <sys/ddt.h> | |
31 | #include <sys/zap.h> | |
32 | #include <sys/dmu_tx.h> | |
33 | #include <sys/arc.h> | |
34 | #include <sys/dsl_pool.h> | |
35 | #include <sys/zio_checksum.h> | |
36 | #include <sys/zio_compress.h> | |
37 | #include <sys/dsl_scan.h> | |
38 | ||
572e2857 BB |
39 | /* |
40 | * Enable/disable prefetching of dedup-ed blocks which are going to be freed. | |
41 | */ | |
42 | int zfs_dedup_prefetch = 1; | |
43 | ||
428870ff BB |
44 | static const ddt_ops_t *ddt_ops[DDT_TYPES] = { |
45 | &ddt_zap_ops, | |
46 | }; | |
47 | ||
48 | static const char *ddt_class_name[DDT_CLASSES] = { | |
49 | "ditto", | |
50 | "duplicate", | |
51 | "unique", | |
52 | }; | |
53 | ||
54 | static void | |
55 | ddt_object_create(ddt_t *ddt, enum ddt_type type, enum ddt_class class, | |
56 | dmu_tx_t *tx) | |
57 | { | |
58 | spa_t *spa = ddt->ddt_spa; | |
59 | objset_t *os = ddt->ddt_os; | |
60 | uint64_t *objectp = &ddt->ddt_object[type][class]; | |
61 | boolean_t prehash = zio_checksum_table[ddt->ddt_checksum].ci_dedup; | |
62 | char name[DDT_NAMELEN]; | |
63 | ||
64 | ddt_object_name(ddt, type, class, name); | |
65 | ||
66 | ASSERT(*objectp == 0); | |
67 | VERIFY(ddt_ops[type]->ddt_op_create(os, objectp, tx, prehash) == 0); | |
68 | ASSERT(*objectp != 0); | |
69 | ||
70 | VERIFY(zap_add(os, DMU_POOL_DIRECTORY_OBJECT, name, | |
71 | sizeof (uint64_t), 1, objectp, tx) == 0); | |
72 | ||
73 | VERIFY(zap_add(os, spa->spa_ddt_stat_object, name, | |
74 | sizeof (uint64_t), sizeof (ddt_histogram_t) / sizeof (uint64_t), | |
75 | &ddt->ddt_histogram[type][class], tx) == 0); | |
76 | } | |
77 | ||
78 | static void | |
79 | ddt_object_destroy(ddt_t *ddt, enum ddt_type type, enum ddt_class class, | |
80 | dmu_tx_t *tx) | |
81 | { | |
82 | spa_t *spa = ddt->ddt_spa; | |
83 | objset_t *os = ddt->ddt_os; | |
84 | uint64_t *objectp = &ddt->ddt_object[type][class]; | |
85 | char name[DDT_NAMELEN]; | |
86 | ||
87 | ddt_object_name(ddt, type, class, name); | |
88 | ||
89 | ASSERT(*objectp != 0); | |
90 | ASSERT(ddt_object_count(ddt, type, class) == 0); | |
91 | ASSERT(ddt_histogram_empty(&ddt->ddt_histogram[type][class])); | |
92 | VERIFY(zap_remove(os, DMU_POOL_DIRECTORY_OBJECT, name, tx) == 0); | |
93 | VERIFY(zap_remove(os, spa->spa_ddt_stat_object, name, tx) == 0); | |
94 | VERIFY(ddt_ops[type]->ddt_op_destroy(os, *objectp, tx) == 0); | |
95 | bzero(&ddt->ddt_object_stats[type][class], sizeof (ddt_object_t)); | |
96 | ||
97 | *objectp = 0; | |
98 | } | |
99 | ||
100 | static int | |
101 | ddt_object_load(ddt_t *ddt, enum ddt_type type, enum ddt_class class) | |
102 | { | |
103 | ddt_object_t *ddo = &ddt->ddt_object_stats[type][class]; | |
104 | dmu_object_info_t doi; | |
105 | char name[DDT_NAMELEN]; | |
106 | int error; | |
107 | ||
108 | ddt_object_name(ddt, type, class, name); | |
109 | ||
110 | error = zap_lookup(ddt->ddt_os, DMU_POOL_DIRECTORY_OBJECT, name, | |
111 | sizeof (uint64_t), 1, &ddt->ddt_object[type][class]); | |
112 | ||
113 | if (error) | |
114 | return (error); | |
115 | ||
116 | error = zap_lookup(ddt->ddt_os, ddt->ddt_spa->spa_ddt_stat_object, name, | |
117 | sizeof (uint64_t), sizeof (ddt_histogram_t) / sizeof (uint64_t), | |
118 | &ddt->ddt_histogram[type][class]); | |
119 | ||
120 | /* | |
121 | * Seed the cached statistics. | |
122 | */ | |
123 | VERIFY(ddt_object_info(ddt, type, class, &doi) == 0); | |
124 | ||
125 | ddo->ddo_count = ddt_object_count(ddt, type, class); | |
126 | ddo->ddo_dspace = doi.doi_physical_blocks_512 << 9; | |
127 | ddo->ddo_mspace = doi.doi_fill_count * doi.doi_data_block_size; | |
128 | ||
129 | ASSERT(error == 0); | |
130 | return (error); | |
131 | } | |
132 | ||
133 | static void | |
134 | ddt_object_sync(ddt_t *ddt, enum ddt_type type, enum ddt_class class, | |
135 | dmu_tx_t *tx) | |
136 | { | |
137 | ddt_object_t *ddo = &ddt->ddt_object_stats[type][class]; | |
138 | dmu_object_info_t doi; | |
139 | char name[DDT_NAMELEN]; | |
140 | ||
141 | ddt_object_name(ddt, type, class, name); | |
142 | ||
143 | VERIFY(zap_update(ddt->ddt_os, ddt->ddt_spa->spa_ddt_stat_object, name, | |
144 | sizeof (uint64_t), sizeof (ddt_histogram_t) / sizeof (uint64_t), | |
145 | &ddt->ddt_histogram[type][class], tx) == 0); | |
146 | ||
147 | /* | |
148 | * Cache DDT statistics; this is the only time they'll change. | |
149 | */ | |
150 | VERIFY(ddt_object_info(ddt, type, class, &doi) == 0); | |
151 | ||
152 | ddo->ddo_count = ddt_object_count(ddt, type, class); | |
153 | ddo->ddo_dspace = doi.doi_physical_blocks_512 << 9; | |
154 | ddo->ddo_mspace = doi.doi_fill_count * doi.doi_data_block_size; | |
155 | } | |
156 | ||
157 | static int | |
158 | ddt_object_lookup(ddt_t *ddt, enum ddt_type type, enum ddt_class class, | |
159 | ddt_entry_t *dde) | |
160 | { | |
161 | if (!ddt_object_exists(ddt, type, class)) | |
162 | return (ENOENT); | |
163 | ||
164 | return (ddt_ops[type]->ddt_op_lookup(ddt->ddt_os, | |
165 | ddt->ddt_object[type][class], dde)); | |
166 | } | |
167 | ||
168 | static void | |
169 | ddt_object_prefetch(ddt_t *ddt, enum ddt_type type, enum ddt_class class, | |
170 | ddt_entry_t *dde) | |
171 | { | |
172 | if (!ddt_object_exists(ddt, type, class)) | |
173 | return; | |
174 | ||
175 | ddt_ops[type]->ddt_op_prefetch(ddt->ddt_os, | |
176 | ddt->ddt_object[type][class], dde); | |
177 | } | |
178 | ||
179 | int | |
180 | ddt_object_update(ddt_t *ddt, enum ddt_type type, enum ddt_class class, | |
181 | ddt_entry_t *dde, dmu_tx_t *tx) | |
182 | { | |
183 | ASSERT(ddt_object_exists(ddt, type, class)); | |
184 | ||
185 | return (ddt_ops[type]->ddt_op_update(ddt->ddt_os, | |
186 | ddt->ddt_object[type][class], dde, tx)); | |
187 | } | |
188 | ||
189 | static int | |
190 | ddt_object_remove(ddt_t *ddt, enum ddt_type type, enum ddt_class class, | |
191 | ddt_entry_t *dde, dmu_tx_t *tx) | |
192 | { | |
193 | ASSERT(ddt_object_exists(ddt, type, class)); | |
194 | ||
195 | return (ddt_ops[type]->ddt_op_remove(ddt->ddt_os, | |
196 | ddt->ddt_object[type][class], dde, tx)); | |
197 | } | |
198 | ||
199 | int | |
200 | ddt_object_walk(ddt_t *ddt, enum ddt_type type, enum ddt_class class, | |
201 | uint64_t *walk, ddt_entry_t *dde) | |
202 | { | |
203 | ASSERT(ddt_object_exists(ddt, type, class)); | |
204 | ||
205 | return (ddt_ops[type]->ddt_op_walk(ddt->ddt_os, | |
206 | ddt->ddt_object[type][class], dde, walk)); | |
207 | } | |
208 | ||
209 | uint64_t | |
210 | ddt_object_count(ddt_t *ddt, enum ddt_type type, enum ddt_class class) | |
211 | { | |
212 | ASSERT(ddt_object_exists(ddt, type, class)); | |
213 | ||
214 | return (ddt_ops[type]->ddt_op_count(ddt->ddt_os, | |
215 | ddt->ddt_object[type][class])); | |
216 | } | |
217 | ||
218 | int | |
219 | ddt_object_info(ddt_t *ddt, enum ddt_type type, enum ddt_class class, | |
220 | dmu_object_info_t *doi) | |
221 | { | |
222 | if (!ddt_object_exists(ddt, type, class)) | |
223 | return (ENOENT); | |
224 | ||
225 | return (dmu_object_info(ddt->ddt_os, ddt->ddt_object[type][class], | |
226 | doi)); | |
227 | } | |
228 | ||
229 | boolean_t | |
230 | ddt_object_exists(ddt_t *ddt, enum ddt_type type, enum ddt_class class) | |
231 | { | |
232 | return (!!ddt->ddt_object[type][class]); | |
233 | } | |
234 | ||
235 | void | |
236 | ddt_object_name(ddt_t *ddt, enum ddt_type type, enum ddt_class class, | |
237 | char *name) | |
238 | { | |
239 | (void) sprintf(name, DMU_POOL_DDT, | |
240 | zio_checksum_table[ddt->ddt_checksum].ci_name, | |
241 | ddt_ops[type]->ddt_op_name, ddt_class_name[class]); | |
242 | } | |
243 | ||
244 | void | |
245 | ddt_bp_fill(const ddt_phys_t *ddp, blkptr_t *bp, uint64_t txg) | |
246 | { | |
247 | ASSERT(txg != 0); | |
248 | ||
249 | for (int d = 0; d < SPA_DVAS_PER_BP; d++) | |
250 | bp->blk_dva[d] = ddp->ddp_dva[d]; | |
251 | BP_SET_BIRTH(bp, txg, ddp->ddp_phys_birth); | |
252 | } | |
253 | ||
254 | void | |
255 | ddt_bp_create(enum zio_checksum checksum, | |
256 | const ddt_key_t *ddk, const ddt_phys_t *ddp, blkptr_t *bp) | |
257 | { | |
258 | BP_ZERO(bp); | |
259 | ||
260 | if (ddp != NULL) | |
261 | ddt_bp_fill(ddp, bp, ddp->ddp_phys_birth); | |
262 | ||
263 | bp->blk_cksum = ddk->ddk_cksum; | |
264 | bp->blk_fill = 1; | |
265 | ||
266 | BP_SET_LSIZE(bp, DDK_GET_LSIZE(ddk)); | |
267 | BP_SET_PSIZE(bp, DDK_GET_PSIZE(ddk)); | |
268 | BP_SET_COMPRESS(bp, DDK_GET_COMPRESS(ddk)); | |
269 | BP_SET_CHECKSUM(bp, checksum); | |
270 | BP_SET_TYPE(bp, DMU_OT_DEDUP); | |
271 | BP_SET_LEVEL(bp, 0); | |
272 | BP_SET_DEDUP(bp, 0); | |
273 | BP_SET_BYTEORDER(bp, ZFS_HOST_BYTEORDER); | |
274 | } | |
275 | ||
276 | void | |
277 | ddt_key_fill(ddt_key_t *ddk, const blkptr_t *bp) | |
278 | { | |
279 | ddk->ddk_cksum = bp->blk_cksum; | |
280 | ddk->ddk_prop = 0; | |
281 | ||
282 | DDK_SET_LSIZE(ddk, BP_GET_LSIZE(bp)); | |
283 | DDK_SET_PSIZE(ddk, BP_GET_PSIZE(bp)); | |
284 | DDK_SET_COMPRESS(ddk, BP_GET_COMPRESS(bp)); | |
285 | } | |
286 | ||
287 | void | |
288 | ddt_phys_fill(ddt_phys_t *ddp, const blkptr_t *bp) | |
289 | { | |
290 | ASSERT(ddp->ddp_phys_birth == 0); | |
291 | ||
292 | for (int d = 0; d < SPA_DVAS_PER_BP; d++) | |
293 | ddp->ddp_dva[d] = bp->blk_dva[d]; | |
294 | ddp->ddp_phys_birth = BP_PHYSICAL_BIRTH(bp); | |
295 | } | |
296 | ||
297 | void | |
298 | ddt_phys_clear(ddt_phys_t *ddp) | |
299 | { | |
300 | bzero(ddp, sizeof (*ddp)); | |
301 | } | |
302 | ||
303 | void | |
304 | ddt_phys_addref(ddt_phys_t *ddp) | |
305 | { | |
306 | ddp->ddp_refcnt++; | |
307 | } | |
308 | ||
309 | void | |
310 | ddt_phys_decref(ddt_phys_t *ddp) | |
311 | { | |
312 | ASSERT((int64_t)ddp->ddp_refcnt > 0); | |
313 | ddp->ddp_refcnt--; | |
314 | } | |
315 | ||
316 | void | |
317 | ddt_phys_free(ddt_t *ddt, ddt_key_t *ddk, ddt_phys_t *ddp, uint64_t txg) | |
318 | { | |
319 | blkptr_t blk; | |
320 | ||
321 | ddt_bp_create(ddt->ddt_checksum, ddk, ddp, &blk); | |
322 | ddt_phys_clear(ddp); | |
323 | zio_free(ddt->ddt_spa, txg, &blk); | |
324 | } | |
325 | ||
326 | ddt_phys_t * | |
327 | ddt_phys_select(const ddt_entry_t *dde, const blkptr_t *bp) | |
328 | { | |
329 | ddt_phys_t *ddp = (ddt_phys_t *)dde->dde_phys; | |
330 | ||
331 | for (int p = 0; p < DDT_PHYS_TYPES; p++, ddp++) { | |
332 | if (DVA_EQUAL(BP_IDENTITY(bp), &ddp->ddp_dva[0]) && | |
333 | BP_PHYSICAL_BIRTH(bp) == ddp->ddp_phys_birth) | |
334 | return (ddp); | |
335 | } | |
336 | return (NULL); | |
337 | } | |
338 | ||
339 | uint64_t | |
340 | ddt_phys_total_refcnt(const ddt_entry_t *dde) | |
341 | { | |
342 | uint64_t refcnt = 0; | |
343 | ||
344 | for (int p = DDT_PHYS_SINGLE; p <= DDT_PHYS_TRIPLE; p++) | |
345 | refcnt += dde->dde_phys[p].ddp_refcnt; | |
346 | ||
347 | return (refcnt); | |
348 | } | |
349 | ||
350 | static void | |
351 | ddt_stat_generate(ddt_t *ddt, ddt_entry_t *dde, ddt_stat_t *dds) | |
352 | { | |
353 | spa_t *spa = ddt->ddt_spa; | |
354 | ddt_phys_t *ddp = dde->dde_phys; | |
355 | ddt_key_t *ddk = &dde->dde_key; | |
356 | uint64_t lsize = DDK_GET_LSIZE(ddk); | |
357 | uint64_t psize = DDK_GET_PSIZE(ddk); | |
358 | ||
359 | bzero(dds, sizeof (*dds)); | |
360 | ||
361 | for (int p = 0; p < DDT_PHYS_TYPES; p++, ddp++) { | |
362 | uint64_t dsize = 0; | |
363 | uint64_t refcnt = ddp->ddp_refcnt; | |
364 | ||
365 | if (ddp->ddp_phys_birth == 0) | |
366 | continue; | |
367 | ||
368 | for (int d = 0; d < SPA_DVAS_PER_BP; d++) | |
369 | dsize += dva_get_dsize_sync(spa, &ddp->ddp_dva[d]); | |
370 | ||
371 | dds->dds_blocks += 1; | |
372 | dds->dds_lsize += lsize; | |
373 | dds->dds_psize += psize; | |
374 | dds->dds_dsize += dsize; | |
375 | ||
376 | dds->dds_ref_blocks += refcnt; | |
377 | dds->dds_ref_lsize += lsize * refcnt; | |
378 | dds->dds_ref_psize += psize * refcnt; | |
379 | dds->dds_ref_dsize += dsize * refcnt; | |
380 | } | |
381 | } | |
382 | ||
383 | void | |
384 | ddt_stat_add(ddt_stat_t *dst, const ddt_stat_t *src, uint64_t neg) | |
385 | { | |
386 | const uint64_t *s = (const uint64_t *)src; | |
387 | uint64_t *d = (uint64_t *)dst; | |
388 | uint64_t *d_end = (uint64_t *)(dst + 1); | |
389 | ||
390 | ASSERT(neg == 0 || neg == -1ULL); /* add or subtract */ | |
391 | ||
392 | while (d < d_end) | |
393 | *d++ += (*s++ ^ neg) - neg; | |
394 | } | |
395 | ||
396 | static void | |
397 | ddt_stat_update(ddt_t *ddt, ddt_entry_t *dde, uint64_t neg) | |
398 | { | |
399 | ddt_stat_t dds; | |
400 | ddt_histogram_t *ddh; | |
401 | int bucket; | |
402 | ||
403 | ddt_stat_generate(ddt, dde, &dds); | |
404 | ||
405 | bucket = highbit(dds.dds_ref_blocks) - 1; | |
406 | ASSERT(bucket >= 0); | |
407 | ||
408 | ddh = &ddt->ddt_histogram[dde->dde_type][dde->dde_class]; | |
409 | ||
410 | ddt_stat_add(&ddh->ddh_stat[bucket], &dds, neg); | |
411 | } | |
412 | ||
413 | void | |
414 | ddt_histogram_add(ddt_histogram_t *dst, const ddt_histogram_t *src) | |
415 | { | |
416 | for (int h = 0; h < 64; h++) | |
417 | ddt_stat_add(&dst->ddh_stat[h], &src->ddh_stat[h], 0); | |
418 | } | |
419 | ||
420 | void | |
421 | ddt_histogram_stat(ddt_stat_t *dds, const ddt_histogram_t *ddh) | |
422 | { | |
423 | bzero(dds, sizeof (*dds)); | |
424 | ||
425 | for (int h = 0; h < 64; h++) | |
426 | ddt_stat_add(dds, &ddh->ddh_stat[h], 0); | |
427 | } | |
428 | ||
429 | boolean_t | |
430 | ddt_histogram_empty(const ddt_histogram_t *ddh) | |
431 | { | |
432 | const uint64_t *s = (const uint64_t *)ddh; | |
433 | const uint64_t *s_end = (const uint64_t *)(ddh + 1); | |
434 | ||
435 | while (s < s_end) | |
436 | if (*s++ != 0) | |
437 | return (B_FALSE); | |
438 | ||
439 | return (B_TRUE); | |
440 | } | |
441 | ||
442 | void | |
443 | ddt_get_dedup_object_stats(spa_t *spa, ddt_object_t *ddo_total) | |
444 | { | |
445 | /* Sum the statistics we cached in ddt_object_sync(). */ | |
446 | for (enum zio_checksum c = 0; c < ZIO_CHECKSUM_FUNCTIONS; c++) { | |
447 | ddt_t *ddt = spa->spa_ddt[c]; | |
448 | for (enum ddt_type type = 0; type < DDT_TYPES; type++) { | |
449 | for (enum ddt_class class = 0; class < DDT_CLASSES; | |
450 | class++) { | |
451 | ddt_object_t *ddo = | |
452 | &ddt->ddt_object_stats[type][class]; | |
453 | ddo_total->ddo_count += ddo->ddo_count; | |
454 | ddo_total->ddo_dspace += ddo->ddo_dspace; | |
455 | ddo_total->ddo_mspace += ddo->ddo_mspace; | |
456 | } | |
457 | } | |
458 | } | |
459 | ||
460 | /* ... and compute the averages. */ | |
461 | if (ddo_total->ddo_count != 0) { | |
462 | ddo_total->ddo_dspace /= ddo_total->ddo_count; | |
463 | ddo_total->ddo_mspace /= ddo_total->ddo_count; | |
428870ff BB |
464 | } |
465 | } | |
466 | ||
467 | void | |
468 | ddt_get_dedup_histogram(spa_t *spa, ddt_histogram_t *ddh) | |
469 | { | |
470 | for (enum zio_checksum c = 0; c < ZIO_CHECKSUM_FUNCTIONS; c++) { | |
471 | ddt_t *ddt = spa->spa_ddt[c]; | |
472 | for (enum ddt_type type = 0; type < DDT_TYPES; type++) { | |
473 | for (enum ddt_class class = 0; class < DDT_CLASSES; | |
474 | class++) { | |
475 | ddt_histogram_add(ddh, | |
476 | &ddt->ddt_histogram_cache[type][class]); | |
477 | } | |
478 | } | |
479 | } | |
480 | } | |
481 | ||
482 | void | |
483 | ddt_get_dedup_stats(spa_t *spa, ddt_stat_t *dds_total) | |
484 | { | |
485 | ddt_histogram_t *ddh_total; | |
486 | ||
487 | ddh_total = kmem_zalloc(sizeof (ddt_histogram_t), KM_SLEEP); | |
488 | ddt_get_dedup_histogram(spa, ddh_total); | |
489 | ddt_histogram_stat(dds_total, ddh_total); | |
490 | kmem_free(ddh_total, sizeof (ddt_histogram_t)); | |
491 | } | |
492 | ||
493 | uint64_t | |
494 | ddt_get_dedup_dspace(spa_t *spa) | |
495 | { | |
496 | ddt_stat_t dds_total = { 0 }; | |
497 | ||
498 | ddt_get_dedup_stats(spa, &dds_total); | |
499 | return (dds_total.dds_ref_dsize - dds_total.dds_dsize); | |
500 | } | |
501 | ||
502 | uint64_t | |
503 | ddt_get_pool_dedup_ratio(spa_t *spa) | |
504 | { | |
505 | ddt_stat_t dds_total = { 0 }; | |
506 | ||
507 | ddt_get_dedup_stats(spa, &dds_total); | |
508 | if (dds_total.dds_dsize == 0) | |
509 | return (100); | |
510 | ||
511 | return (dds_total.dds_ref_dsize * 100 / dds_total.dds_dsize); | |
512 | } | |
513 | ||
514 | int | |
515 | ddt_ditto_copies_needed(ddt_t *ddt, ddt_entry_t *dde, ddt_phys_t *ddp_willref) | |
516 | { | |
517 | spa_t *spa = ddt->ddt_spa; | |
518 | uint64_t total_refcnt = 0; | |
519 | uint64_t ditto = spa->spa_dedup_ditto; | |
520 | int total_copies = 0; | |
521 | int desired_copies = 0; | |
522 | ||
523 | for (int p = DDT_PHYS_SINGLE; p <= DDT_PHYS_TRIPLE; p++) { | |
524 | ddt_phys_t *ddp = &dde->dde_phys[p]; | |
525 | zio_t *zio = dde->dde_lead_zio[p]; | |
526 | uint64_t refcnt = ddp->ddp_refcnt; /* committed refs */ | |
527 | if (zio != NULL) | |
528 | refcnt += zio->io_parent_count; /* pending refs */ | |
529 | if (ddp == ddp_willref) | |
530 | refcnt++; /* caller's ref */ | |
531 | if (refcnt != 0) { | |
532 | total_refcnt += refcnt; | |
533 | total_copies += p; | |
534 | } | |
535 | } | |
536 | ||
537 | if (ditto == 0 || ditto > UINT32_MAX) | |
538 | ditto = UINT32_MAX; | |
539 | ||
540 | if (total_refcnt >= 1) | |
541 | desired_copies++; | |
542 | if (total_refcnt >= ditto) | |
543 | desired_copies++; | |
544 | if (total_refcnt >= ditto * ditto) | |
545 | desired_copies++; | |
546 | ||
547 | return (MAX(desired_copies, total_copies) - total_copies); | |
548 | } | |
549 | ||
550 | int | |
551 | ddt_ditto_copies_present(ddt_entry_t *dde) | |
552 | { | |
553 | ddt_phys_t *ddp = &dde->dde_phys[DDT_PHYS_DITTO]; | |
554 | dva_t *dva = ddp->ddp_dva; | |
555 | int copies = 0 - DVA_GET_GANG(dva); | |
556 | ||
557 | for (int d = 0; d < SPA_DVAS_PER_BP; d++, dva++) | |
558 | if (DVA_IS_VALID(dva)) | |
559 | copies++; | |
560 | ||
561 | ASSERT(copies >= 0 && copies < SPA_DVAS_PER_BP); | |
562 | ||
563 | return (copies); | |
564 | } | |
565 | ||
566 | size_t | |
567 | ddt_compress(void *src, uchar_t *dst, size_t s_len, size_t d_len) | |
568 | { | |
569 | uchar_t *version = dst++; | |
570 | int cpfunc = ZIO_COMPRESS_ZLE; | |
571 | zio_compress_info_t *ci = &zio_compress_table[cpfunc]; | |
572 | size_t c_len; | |
573 | ||
574 | ASSERT(d_len >= s_len + 1); /* no compression plus version byte */ | |
575 | ||
576 | c_len = ci->ci_compress(src, dst, s_len, d_len - 1, ci->ci_level); | |
577 | ||
578 | if (c_len == s_len) { | |
579 | cpfunc = ZIO_COMPRESS_OFF; | |
580 | bcopy(src, dst, s_len); | |
581 | } | |
582 | ||
583 | *version = (ZFS_HOST_BYTEORDER & DDT_COMPRESS_BYTEORDER_MASK) | cpfunc; | |
584 | ||
585 | return (c_len + 1); | |
586 | } | |
587 | ||
588 | void | |
589 | ddt_decompress(uchar_t *src, void *dst, size_t s_len, size_t d_len) | |
590 | { | |
591 | uchar_t version = *src++; | |
592 | int cpfunc = version & DDT_COMPRESS_FUNCTION_MASK; | |
593 | zio_compress_info_t *ci = &zio_compress_table[cpfunc]; | |
594 | ||
595 | if (ci->ci_decompress != NULL) | |
596 | (void) ci->ci_decompress(src, dst, s_len, d_len, ci->ci_level); | |
597 | else | |
598 | bcopy(src, dst, d_len); | |
599 | ||
600 | if ((version ^ ZFS_HOST_BYTEORDER) & DDT_COMPRESS_BYTEORDER_MASK) | |
601 | byteswap_uint64_array(dst, d_len); | |
602 | } | |
603 | ||
604 | ddt_t * | |
605 | ddt_select_by_checksum(spa_t *spa, enum zio_checksum c) | |
606 | { | |
607 | return (spa->spa_ddt[c]); | |
608 | } | |
609 | ||
610 | ddt_t * | |
611 | ddt_select(spa_t *spa, const blkptr_t *bp) | |
612 | { | |
613 | return (spa->spa_ddt[BP_GET_CHECKSUM(bp)]); | |
614 | } | |
615 | ||
616 | void | |
617 | ddt_enter(ddt_t *ddt) | |
618 | { | |
619 | mutex_enter(&ddt->ddt_lock); | |
620 | } | |
621 | ||
622 | void | |
623 | ddt_exit(ddt_t *ddt) | |
624 | { | |
625 | mutex_exit(&ddt->ddt_lock); | |
626 | } | |
627 | ||
628 | static ddt_entry_t * | |
629 | ddt_alloc(const ddt_key_t *ddk) | |
630 | { | |
631 | ddt_entry_t *dde; | |
632 | ||
633 | dde = kmem_zalloc(sizeof (ddt_entry_t), KM_SLEEP); | |
634 | cv_init(&dde->dde_cv, NULL, CV_DEFAULT, NULL); | |
635 | ||
636 | dde->dde_key = *ddk; | |
637 | ||
638 | return (dde); | |
639 | } | |
640 | ||
641 | static void | |
642 | ddt_free(ddt_entry_t *dde) | |
643 | { | |
644 | ASSERT(!dde->dde_loading); | |
645 | ||
646 | for (int p = 0; p < DDT_PHYS_TYPES; p++) | |
647 | ASSERT(dde->dde_lead_zio[p] == NULL); | |
648 | ||
649 | if (dde->dde_repair_data != NULL) | |
650 | zio_buf_free(dde->dde_repair_data, | |
651 | DDK_GET_PSIZE(&dde->dde_key)); | |
652 | ||
653 | cv_destroy(&dde->dde_cv); | |
654 | kmem_free(dde, sizeof (*dde)); | |
655 | } | |
656 | ||
657 | void | |
658 | ddt_remove(ddt_t *ddt, ddt_entry_t *dde) | |
659 | { | |
660 | ASSERT(MUTEX_HELD(&ddt->ddt_lock)); | |
661 | ||
662 | avl_remove(&ddt->ddt_tree, dde); | |
663 | ddt_free(dde); | |
664 | } | |
665 | ||
666 | ddt_entry_t * | |
667 | ddt_lookup(ddt_t *ddt, const blkptr_t *bp, boolean_t add) | |
668 | { | |
669 | ddt_entry_t *dde, dde_search; | |
670 | enum ddt_type type; | |
671 | enum ddt_class class; | |
672 | avl_index_t where; | |
673 | int error; | |
674 | ||
675 | ASSERT(MUTEX_HELD(&ddt->ddt_lock)); | |
676 | ||
677 | ddt_key_fill(&dde_search.dde_key, bp); | |
678 | ||
679 | dde = avl_find(&ddt->ddt_tree, &dde_search, &where); | |
680 | if (dde == NULL) { | |
681 | if (!add) | |
682 | return (NULL); | |
683 | dde = ddt_alloc(&dde_search.dde_key); | |
684 | avl_insert(&ddt->ddt_tree, dde, where); | |
685 | } | |
686 | ||
687 | while (dde->dde_loading) | |
688 | cv_wait(&dde->dde_cv, &ddt->ddt_lock); | |
689 | ||
690 | if (dde->dde_loaded) | |
691 | return (dde); | |
692 | ||
693 | dde->dde_loading = B_TRUE; | |
694 | ||
695 | ddt_exit(ddt); | |
696 | ||
697 | error = ENOENT; | |
698 | ||
699 | for (type = 0; type < DDT_TYPES; type++) { | |
700 | for (class = 0; class < DDT_CLASSES; class++) { | |
701 | error = ddt_object_lookup(ddt, type, class, dde); | |
702 | if (error != ENOENT) | |
703 | break; | |
704 | } | |
705 | if (error != ENOENT) | |
706 | break; | |
707 | } | |
708 | ||
709 | ASSERT(error == 0 || error == ENOENT); | |
710 | ||
711 | ddt_enter(ddt); | |
712 | ||
713 | ASSERT(dde->dde_loaded == B_FALSE); | |
714 | ASSERT(dde->dde_loading == B_TRUE); | |
715 | ||
716 | dde->dde_type = type; /* will be DDT_TYPES if no entry found */ | |
717 | dde->dde_class = class; /* will be DDT_CLASSES if no entry found */ | |
718 | dde->dde_loaded = B_TRUE; | |
719 | dde->dde_loading = B_FALSE; | |
720 | ||
721 | if (error == 0) | |
722 | ddt_stat_update(ddt, dde, -1ULL); | |
723 | ||
724 | cv_broadcast(&dde->dde_cv); | |
725 | ||
726 | return (dde); | |
727 | } | |
728 | ||
729 | void | |
730 | ddt_prefetch(spa_t *spa, const blkptr_t *bp) | |
731 | { | |
732 | ddt_t *ddt; | |
733 | ddt_entry_t dde; | |
734 | ||
572e2857 | 735 | if (!zfs_dedup_prefetch || bp == NULL || !BP_GET_DEDUP(bp)) |
428870ff BB |
736 | return; |
737 | ||
738 | /* | |
572e2857 BB |
739 | * We only remove the DDT once all tables are empty and only |
740 | * prefetch dedup blocks when there are entries in the DDT. | |
741 | * Thus no locking is required as the DDT can't disappear on us. | |
428870ff BB |
742 | */ |
743 | ddt = ddt_select(spa, bp); | |
744 | ddt_key_fill(&dde.dde_key, bp); | |
745 | ||
746 | for (enum ddt_type type = 0; type < DDT_TYPES; type++) { | |
747 | for (enum ddt_class class = 0; class < DDT_CLASSES; class++) { | |
748 | ddt_object_prefetch(ddt, type, class, &dde); | |
749 | } | |
750 | } | |
751 | } | |
752 | ||
753 | int | |
754 | ddt_entry_compare(const void *x1, const void *x2) | |
755 | { | |
756 | const ddt_entry_t *dde1 = x1; | |
757 | const ddt_entry_t *dde2 = x2; | |
758 | const uint64_t *u1 = (const uint64_t *)&dde1->dde_key; | |
759 | const uint64_t *u2 = (const uint64_t *)&dde2->dde_key; | |
760 | ||
761 | for (int i = 0; i < DDT_KEY_WORDS; i++) { | |
762 | if (u1[i] < u2[i]) | |
763 | return (-1); | |
764 | if (u1[i] > u2[i]) | |
765 | return (1); | |
766 | } | |
767 | ||
768 | return (0); | |
769 | } | |
770 | ||
771 | static ddt_t * | |
772 | ddt_table_alloc(spa_t *spa, enum zio_checksum c) | |
773 | { | |
774 | ddt_t *ddt; | |
775 | ||
776 | ddt = kmem_zalloc(sizeof (*ddt), KM_SLEEP); | |
777 | ||
778 | mutex_init(&ddt->ddt_lock, NULL, MUTEX_DEFAULT, NULL); | |
779 | avl_create(&ddt->ddt_tree, ddt_entry_compare, | |
780 | sizeof (ddt_entry_t), offsetof(ddt_entry_t, dde_node)); | |
781 | avl_create(&ddt->ddt_repair_tree, ddt_entry_compare, | |
782 | sizeof (ddt_entry_t), offsetof(ddt_entry_t, dde_node)); | |
783 | ddt->ddt_checksum = c; | |
784 | ddt->ddt_spa = spa; | |
785 | ddt->ddt_os = spa->spa_meta_objset; | |
786 | ||
787 | return (ddt); | |
788 | } | |
789 | ||
790 | static void | |
791 | ddt_table_free(ddt_t *ddt) | |
792 | { | |
793 | ASSERT(avl_numnodes(&ddt->ddt_tree) == 0); | |
794 | ASSERT(avl_numnodes(&ddt->ddt_repair_tree) == 0); | |
795 | avl_destroy(&ddt->ddt_tree); | |
796 | avl_destroy(&ddt->ddt_repair_tree); | |
797 | mutex_destroy(&ddt->ddt_lock); | |
798 | kmem_free(ddt, sizeof (*ddt)); | |
799 | } | |
800 | ||
801 | void | |
802 | ddt_create(spa_t *spa) | |
803 | { | |
804 | spa->spa_dedup_checksum = ZIO_DEDUPCHECKSUM; | |
805 | ||
806 | for (enum zio_checksum c = 0; c < ZIO_CHECKSUM_FUNCTIONS; c++) | |
807 | spa->spa_ddt[c] = ddt_table_alloc(spa, c); | |
808 | } | |
809 | ||
810 | int | |
811 | ddt_load(spa_t *spa) | |
812 | { | |
813 | int error; | |
814 | ||
815 | ddt_create(spa); | |
816 | ||
817 | error = zap_lookup(spa->spa_meta_objset, DMU_POOL_DIRECTORY_OBJECT, | |
818 | DMU_POOL_DDT_STATS, sizeof (uint64_t), 1, | |
819 | &spa->spa_ddt_stat_object); | |
820 | ||
821 | if (error) | |
822 | return (error == ENOENT ? 0 : error); | |
823 | ||
824 | for (enum zio_checksum c = 0; c < ZIO_CHECKSUM_FUNCTIONS; c++) { | |
825 | ddt_t *ddt = spa->spa_ddt[c]; | |
826 | for (enum ddt_type type = 0; type < DDT_TYPES; type++) { | |
827 | for (enum ddt_class class = 0; class < DDT_CLASSES; | |
828 | class++) { | |
829 | error = ddt_object_load(ddt, type, class); | |
830 | if (error != 0 && error != ENOENT) | |
831 | return (error); | |
832 | } | |
833 | } | |
834 | ||
835 | /* | |
836 | * Seed the cached histograms. | |
837 | */ | |
838 | bcopy(ddt->ddt_histogram, &ddt->ddt_histogram_cache, | |
839 | sizeof (ddt->ddt_histogram)); | |
840 | } | |
841 | ||
842 | return (0); | |
843 | } | |
844 | ||
845 | void | |
846 | ddt_unload(spa_t *spa) | |
847 | { | |
848 | for (enum zio_checksum c = 0; c < ZIO_CHECKSUM_FUNCTIONS; c++) { | |
849 | if (spa->spa_ddt[c]) { | |
850 | ddt_table_free(spa->spa_ddt[c]); | |
851 | spa->spa_ddt[c] = NULL; | |
852 | } | |
853 | } | |
854 | } | |
855 | ||
856 | boolean_t | |
857 | ddt_class_contains(spa_t *spa, enum ddt_class max_class, const blkptr_t *bp) | |
858 | { | |
859 | ddt_t *ddt; | |
860 | ddt_entry_t dde; | |
861 | ||
862 | if (!BP_GET_DEDUP(bp)) | |
863 | return (B_FALSE); | |
864 | ||
865 | if (max_class == DDT_CLASS_UNIQUE) | |
866 | return (B_TRUE); | |
867 | ||
868 | ddt = spa->spa_ddt[BP_GET_CHECKSUM(bp)]; | |
869 | ||
870 | ddt_key_fill(&dde.dde_key, bp); | |
871 | ||
872 | for (enum ddt_type type = 0; type < DDT_TYPES; type++) | |
873 | for (enum ddt_class class = 0; class <= max_class; class++) | |
874 | if (ddt_object_lookup(ddt, type, class, &dde) == 0) | |
875 | return (B_TRUE); | |
876 | ||
877 | return (B_FALSE); | |
878 | } | |
879 | ||
880 | ddt_entry_t * | |
881 | ddt_repair_start(ddt_t *ddt, const blkptr_t *bp) | |
882 | { | |
883 | ddt_key_t ddk; | |
884 | ddt_entry_t *dde; | |
885 | ||
886 | ddt_key_fill(&ddk, bp); | |
887 | ||
888 | dde = ddt_alloc(&ddk); | |
889 | ||
890 | for (enum ddt_type type = 0; type < DDT_TYPES; type++) { | |
891 | for (enum ddt_class class = 0; class < DDT_CLASSES; class++) { | |
892 | /* | |
893 | * We can only do repair if there are multiple copies | |
894 | * of the block. For anything in the UNIQUE class, | |
895 | * there's definitely only one copy, so don't even try. | |
896 | */ | |
897 | if (class != DDT_CLASS_UNIQUE && | |
898 | ddt_object_lookup(ddt, type, class, dde) == 0) | |
899 | return (dde); | |
900 | } | |
901 | } | |
902 | ||
903 | bzero(dde->dde_phys, sizeof (dde->dde_phys)); | |
904 | ||
905 | return (dde); | |
906 | } | |
907 | ||
908 | void | |
909 | ddt_repair_done(ddt_t *ddt, ddt_entry_t *dde) | |
910 | { | |
911 | avl_index_t where; | |
912 | ||
913 | ddt_enter(ddt); | |
914 | ||
915 | if (dde->dde_repair_data != NULL && spa_writeable(ddt->ddt_spa) && | |
916 | avl_find(&ddt->ddt_repair_tree, dde, &where) == NULL) | |
917 | avl_insert(&ddt->ddt_repair_tree, dde, where); | |
918 | else | |
919 | ddt_free(dde); | |
920 | ||
921 | ddt_exit(ddt); | |
922 | } | |
923 | ||
924 | static void | |
925 | ddt_repair_entry_done(zio_t *zio) | |
926 | { | |
927 | ddt_entry_t *rdde = zio->io_private; | |
928 | ||
929 | ddt_free(rdde); | |
930 | } | |
931 | ||
932 | static void | |
933 | ddt_repair_entry(ddt_t *ddt, ddt_entry_t *dde, ddt_entry_t *rdde, zio_t *rio) | |
934 | { | |
935 | ddt_phys_t *ddp = dde->dde_phys; | |
936 | ddt_phys_t *rddp = rdde->dde_phys; | |
937 | ddt_key_t *ddk = &dde->dde_key; | |
938 | ddt_key_t *rddk = &rdde->dde_key; | |
939 | zio_t *zio; | |
940 | blkptr_t blk; | |
941 | ||
942 | zio = zio_null(rio, rio->io_spa, NULL, | |
943 | ddt_repair_entry_done, rdde, rio->io_flags); | |
944 | ||
945 | for (int p = 0; p < DDT_PHYS_TYPES; p++, ddp++, rddp++) { | |
946 | if (ddp->ddp_phys_birth == 0 || | |
947 | ddp->ddp_phys_birth != rddp->ddp_phys_birth || | |
948 | bcmp(ddp->ddp_dva, rddp->ddp_dva, sizeof (ddp->ddp_dva))) | |
949 | continue; | |
950 | ddt_bp_create(ddt->ddt_checksum, ddk, ddp, &blk); | |
951 | zio_nowait(zio_rewrite(zio, zio->io_spa, 0, &blk, | |
952 | rdde->dde_repair_data, DDK_GET_PSIZE(rddk), NULL, NULL, | |
953 | ZIO_PRIORITY_SYNC_WRITE, ZIO_DDT_CHILD_FLAGS(zio), NULL)); | |
954 | } | |
955 | ||
956 | zio_nowait(zio); | |
957 | } | |
958 | ||
959 | static void | |
960 | ddt_repair_table(ddt_t *ddt, zio_t *rio) | |
961 | { | |
962 | spa_t *spa = ddt->ddt_spa; | |
963 | ddt_entry_t *dde, *rdde_next, *rdde; | |
964 | avl_tree_t *t = &ddt->ddt_repair_tree; | |
965 | blkptr_t blk; | |
966 | ||
967 | if (spa_sync_pass(spa) > 1) | |
968 | return; | |
969 | ||
970 | ddt_enter(ddt); | |
971 | for (rdde = avl_first(t); rdde != NULL; rdde = rdde_next) { | |
972 | rdde_next = AVL_NEXT(t, rdde); | |
973 | avl_remove(&ddt->ddt_repair_tree, rdde); | |
974 | ddt_exit(ddt); | |
975 | ddt_bp_create(ddt->ddt_checksum, &rdde->dde_key, NULL, &blk); | |
976 | dde = ddt_repair_start(ddt, &blk); | |
977 | ddt_repair_entry(ddt, dde, rdde, rio); | |
978 | ddt_repair_done(ddt, dde); | |
979 | ddt_enter(ddt); | |
980 | } | |
981 | ddt_exit(ddt); | |
982 | } | |
983 | ||
984 | static void | |
985 | ddt_sync_entry(ddt_t *ddt, ddt_entry_t *dde, dmu_tx_t *tx, uint64_t txg) | |
986 | { | |
987 | dsl_pool_t *dp = ddt->ddt_spa->spa_dsl_pool; | |
988 | ddt_phys_t *ddp = dde->dde_phys; | |
989 | ddt_key_t *ddk = &dde->dde_key; | |
990 | enum ddt_type otype = dde->dde_type; | |
991 | enum ddt_type ntype = DDT_TYPE_CURRENT; | |
992 | enum ddt_class oclass = dde->dde_class; | |
993 | enum ddt_class nclass; | |
994 | uint64_t total_refcnt = 0; | |
995 | ||
996 | ASSERT(dde->dde_loaded); | |
997 | ASSERT(!dde->dde_loading); | |
998 | ||
999 | for (int p = 0; p < DDT_PHYS_TYPES; p++, ddp++) { | |
1000 | ASSERT(dde->dde_lead_zio[p] == NULL); | |
1001 | ASSERT((int64_t)ddp->ddp_refcnt >= 0); | |
1002 | if (ddp->ddp_phys_birth == 0) { | |
1003 | ASSERT(ddp->ddp_refcnt == 0); | |
1004 | continue; | |
1005 | } | |
1006 | if (p == DDT_PHYS_DITTO) { | |
1007 | if (ddt_ditto_copies_needed(ddt, dde, NULL) == 0) | |
1008 | ddt_phys_free(ddt, ddk, ddp, txg); | |
1009 | continue; | |
1010 | } | |
1011 | if (ddp->ddp_refcnt == 0) | |
1012 | ddt_phys_free(ddt, ddk, ddp, txg); | |
1013 | total_refcnt += ddp->ddp_refcnt; | |
1014 | } | |
1015 | ||
1016 | if (dde->dde_phys[DDT_PHYS_DITTO].ddp_phys_birth != 0) | |
1017 | nclass = DDT_CLASS_DITTO; | |
1018 | else if (total_refcnt > 1) | |
1019 | nclass = DDT_CLASS_DUPLICATE; | |
1020 | else | |
1021 | nclass = DDT_CLASS_UNIQUE; | |
1022 | ||
1023 | if (otype != DDT_TYPES && | |
1024 | (otype != ntype || oclass != nclass || total_refcnt == 0)) { | |
1025 | VERIFY(ddt_object_remove(ddt, otype, oclass, dde, tx) == 0); | |
1026 | ASSERT(ddt_object_lookup(ddt, otype, oclass, dde) == ENOENT); | |
1027 | } | |
1028 | ||
1029 | if (total_refcnt != 0) { | |
1030 | dde->dde_type = ntype; | |
1031 | dde->dde_class = nclass; | |
1032 | ddt_stat_update(ddt, dde, 0); | |
1033 | if (!ddt_object_exists(ddt, ntype, nclass)) | |
1034 | ddt_object_create(ddt, ntype, nclass, tx); | |
1035 | VERIFY(ddt_object_update(ddt, ntype, nclass, dde, tx) == 0); | |
1036 | ||
1037 | /* | |
1038 | * If the class changes, the order that we scan this bp | |
1039 | * changes. If it decreases, we could miss it, so | |
1040 | * scan it right now. (This covers both class changing | |
1041 | * while we are doing ddt_walk(), and when we are | |
1042 | * traversing.) | |
1043 | */ | |
1044 | if (nclass < oclass) { | |
1045 | dsl_scan_ddt_entry(dp->dp_scan, | |
1046 | ddt->ddt_checksum, dde, tx); | |
1047 | } | |
1048 | } | |
1049 | } | |
1050 | ||
1051 | static void | |
1052 | ddt_sync_table(ddt_t *ddt, dmu_tx_t *tx, uint64_t txg) | |
1053 | { | |
1054 | spa_t *spa = ddt->ddt_spa; | |
1055 | ddt_entry_t *dde; | |
1056 | void *cookie = NULL; | |
1057 | ||
1058 | if (avl_numnodes(&ddt->ddt_tree) == 0) | |
1059 | return; | |
1060 | ||
1061 | ASSERT(spa->spa_uberblock.ub_version >= SPA_VERSION_DEDUP); | |
1062 | ||
1063 | if (spa->spa_ddt_stat_object == 0) { | |
1064 | spa->spa_ddt_stat_object = zap_create(ddt->ddt_os, | |
1065 | DMU_OT_DDT_STATS, DMU_OT_NONE, 0, tx); | |
1066 | VERIFY(zap_add(ddt->ddt_os, DMU_POOL_DIRECTORY_OBJECT, | |
1067 | DMU_POOL_DDT_STATS, sizeof (uint64_t), 1, | |
1068 | &spa->spa_ddt_stat_object, tx) == 0); | |
1069 | } | |
1070 | ||
1071 | while ((dde = avl_destroy_nodes(&ddt->ddt_tree, &cookie)) != NULL) { | |
1072 | ddt_sync_entry(ddt, dde, tx, txg); | |
1073 | ddt_free(dde); | |
1074 | } | |
1075 | ||
1076 | for (enum ddt_type type = 0; type < DDT_TYPES; type++) { | |
572e2857 BB |
1077 | uint64_t count = 0; |
1078 | for (enum ddt_class class = 0; class < DDT_CLASSES; class++) { | |
1079 | if (ddt_object_exists(ddt, type, class)) { | |
1080 | ddt_object_sync(ddt, type, class, tx); | |
1081 | count += ddt_object_count(ddt, type, class); | |
1082 | } | |
1083 | } | |
428870ff | 1084 | for (enum ddt_class class = 0; class < DDT_CLASSES; class++) { |
572e2857 | 1085 | if (count == 0 && ddt_object_exists(ddt, type, class)) |
428870ff BB |
1086 | ddt_object_destroy(ddt, type, class, tx); |
1087 | } | |
1088 | } | |
1089 | ||
1090 | bcopy(ddt->ddt_histogram, &ddt->ddt_histogram_cache, | |
1091 | sizeof (ddt->ddt_histogram)); | |
1092 | } | |
1093 | ||
1094 | void | |
1095 | ddt_sync(spa_t *spa, uint64_t txg) | |
1096 | { | |
1097 | dmu_tx_t *tx; | |
1098 | zio_t *rio = zio_root(spa, NULL, NULL, | |
1099 | ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE); | |
1100 | ||
1101 | ASSERT(spa_syncing_txg(spa) == txg); | |
1102 | ||
1103 | tx = dmu_tx_create_assigned(spa->spa_dsl_pool, txg); | |
1104 | ||
1105 | for (enum zio_checksum c = 0; c < ZIO_CHECKSUM_FUNCTIONS; c++) { | |
1106 | ddt_t *ddt = spa->spa_ddt[c]; | |
1107 | if (ddt == NULL) | |
1108 | continue; | |
1109 | ddt_sync_table(ddt, tx, txg); | |
1110 | ddt_repair_table(ddt, rio); | |
1111 | } | |
1112 | ||
1113 | (void) zio_wait(rio); | |
1114 | ||
1115 | dmu_tx_commit(tx); | |
1116 | } | |
1117 | ||
1118 | int | |
1119 | ddt_walk(spa_t *spa, ddt_bookmark_t *ddb, ddt_entry_t *dde) | |
1120 | { | |
1121 | do { | |
1122 | do { | |
1123 | do { | |
1124 | ddt_t *ddt = spa->spa_ddt[ddb->ddb_checksum]; | |
1125 | int error = ENOENT; | |
1126 | if (ddt_object_exists(ddt, ddb->ddb_type, | |
1127 | ddb->ddb_class)) { | |
1128 | error = ddt_object_walk(ddt, | |
1129 | ddb->ddb_type, ddb->ddb_class, | |
1130 | &ddb->ddb_cursor, dde); | |
1131 | } | |
1132 | dde->dde_type = ddb->ddb_type; | |
1133 | dde->dde_class = ddb->ddb_class; | |
1134 | if (error == 0) | |
1135 | return (0); | |
1136 | if (error != ENOENT) | |
1137 | return (error); | |
1138 | ddb->ddb_cursor = 0; | |
1139 | } while (++ddb->ddb_checksum < ZIO_CHECKSUM_FUNCTIONS); | |
1140 | ddb->ddb_checksum = 0; | |
1141 | } while (++ddb->ddb_type < DDT_TYPES); | |
1142 | ddb->ddb_type = 0; | |
1143 | } while (++ddb->ddb_class < DDT_CLASSES); | |
1144 | ||
1145 | return (ENOENT); | |
1146 | } |