1b24ab676SJeff Bonwick /* 2b24ab676SJeff Bonwick * CDDL HEADER START 3b24ab676SJeff Bonwick * 4b24ab676SJeff Bonwick * The contents of this file are subject to the terms of the 5b24ab676SJeff Bonwick * Common Development and Distribution License (the "License"). 6b24ab676SJeff Bonwick * You may not use this file except in compliance with the License. 7b24ab676SJeff Bonwick * 8b24ab676SJeff Bonwick * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9b24ab676SJeff Bonwick * or http://www.opensolaris.org/os/licensing. 10b24ab676SJeff Bonwick * See the License for the specific language governing permissions 11b24ab676SJeff Bonwick * and limitations under the License. 12b24ab676SJeff Bonwick * 13b24ab676SJeff Bonwick * When distributing Covered Code, include this CDDL HEADER in each 14b24ab676SJeff Bonwick * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15b24ab676SJeff Bonwick * If applicable, add the following below this CDDL HEADER, with the 16b24ab676SJeff Bonwick * fields enclosed by brackets "[]" replaced with your own identifying 17b24ab676SJeff Bonwick * information: Portions Copyright [yyyy] [name of copyright owner] 18b24ab676SJeff Bonwick * 19b24ab676SJeff Bonwick * CDDL HEADER END 20b24ab676SJeff Bonwick */ 21b24ab676SJeff Bonwick 22b24ab676SJeff Bonwick /* 23*3f9d6ad7SLin Ling * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved. 24b24ab676SJeff Bonwick */ 25b24ab676SJeff Bonwick 26b24ab676SJeff Bonwick #include <sys/zfs_context.h> 27b24ab676SJeff Bonwick #include <sys/spa.h> 28b24ab676SJeff Bonwick #include <sys/spa_impl.h> 29b24ab676SJeff Bonwick #include <sys/zio.h> 30b24ab676SJeff Bonwick #include <sys/ddt.h> 31b24ab676SJeff Bonwick #include <sys/zap.h> 32b24ab676SJeff Bonwick #include <sys/dmu_tx.h> 33b24ab676SJeff Bonwick #include <sys/arc.h> 34bbfd46c4SJeff Bonwick #include <sys/dsl_pool.h> 35b24ab676SJeff Bonwick #include <sys/zio_checksum.h> 36b24ab676SJeff Bonwick #include <sys/zio_compress.h> 37*3f9d6ad7SLin Ling #include <sys/dsl_scan.h> 38b24ab676SJeff Bonwick 39b24ab676SJeff Bonwick static const ddt_ops_t *ddt_ops[DDT_TYPES] = { 40b24ab676SJeff Bonwick &ddt_zap_ops, 41b24ab676SJeff Bonwick }; 42b24ab676SJeff Bonwick 43b24ab676SJeff Bonwick static const char *ddt_class_name[DDT_CLASSES] = { 44b24ab676SJeff Bonwick "ditto", 45b24ab676SJeff Bonwick "duplicate", 46b24ab676SJeff Bonwick "unique", 47b24ab676SJeff Bonwick }; 48b24ab676SJeff Bonwick 49b24ab676SJeff Bonwick static void 50b24ab676SJeff Bonwick ddt_object_create(ddt_t *ddt, enum ddt_type type, enum ddt_class class, 51b24ab676SJeff Bonwick dmu_tx_t *tx) 52b24ab676SJeff Bonwick { 53b24ab676SJeff Bonwick spa_t *spa = ddt->ddt_spa; 54b24ab676SJeff Bonwick objset_t *os = ddt->ddt_os; 55b24ab676SJeff Bonwick uint64_t *objectp = &ddt->ddt_object[type][class]; 56b24ab676SJeff Bonwick boolean_t prehash = zio_checksum_table[ddt->ddt_checksum].ci_dedup; 57b24ab676SJeff Bonwick char name[DDT_NAMELEN]; 58b24ab676SJeff Bonwick 59b24ab676SJeff Bonwick ddt_object_name(ddt, type, class, name); 60b24ab676SJeff Bonwick 61b24ab676SJeff Bonwick ASSERT(*objectp == 0); 62b24ab676SJeff Bonwick VERIFY(ddt_ops[type]->ddt_op_create(os, objectp, tx, prehash) == 0); 63b24ab676SJeff Bonwick ASSERT(*objectp != 0); 64b24ab676SJeff Bonwick 65b24ab676SJeff Bonwick VERIFY(zap_add(os, DMU_POOL_DIRECTORY_OBJECT, name, 66b24ab676SJeff Bonwick sizeof (uint64_t), 1, objectp, tx) == 0); 67b24ab676SJeff Bonwick 68b24ab676SJeff Bonwick VERIFY(zap_add(os, spa->spa_ddt_stat_object, name, 69b24ab676SJeff Bonwick sizeof (uint64_t), sizeof (ddt_histogram_t) / sizeof (uint64_t), 70b24ab676SJeff Bonwick &ddt->ddt_histogram[type][class], tx) == 0); 71b24ab676SJeff Bonwick } 72b24ab676SJeff Bonwick 73b24ab676SJeff Bonwick static void 74b24ab676SJeff Bonwick ddt_object_destroy(ddt_t *ddt, enum ddt_type type, enum ddt_class class, 75b24ab676SJeff Bonwick dmu_tx_t *tx) 76b24ab676SJeff Bonwick { 77b24ab676SJeff Bonwick spa_t *spa = ddt->ddt_spa; 78b24ab676SJeff Bonwick objset_t *os = ddt->ddt_os; 79b24ab676SJeff Bonwick uint64_t *objectp = &ddt->ddt_object[type][class]; 80b24ab676SJeff Bonwick char name[DDT_NAMELEN]; 81b24ab676SJeff Bonwick 82b24ab676SJeff Bonwick ddt_object_name(ddt, type, class, name); 83b24ab676SJeff Bonwick 84b24ab676SJeff Bonwick ASSERT(*objectp != 0); 85b24ab676SJeff Bonwick ASSERT(ddt_object_count(ddt, type, class) == 0); 86b24ab676SJeff Bonwick ASSERT(ddt_histogram_empty(&ddt->ddt_histogram[type][class])); 87b24ab676SJeff Bonwick VERIFY(zap_remove(os, DMU_POOL_DIRECTORY_OBJECT, name, tx) == 0); 88b24ab676SJeff Bonwick VERIFY(zap_remove(os, spa->spa_ddt_stat_object, name, tx) == 0); 89b24ab676SJeff Bonwick VERIFY(ddt_ops[type]->ddt_op_destroy(os, *objectp, tx) == 0); 9030f608a4SGeorge Wilson bzero(&ddt->ddt_object_stats[type][class], sizeof (ddt_object_t)); 91b24ab676SJeff Bonwick 92b24ab676SJeff Bonwick *objectp = 0; 93b24ab676SJeff Bonwick } 94b24ab676SJeff Bonwick 95b24ab676SJeff Bonwick static int 96b24ab676SJeff Bonwick ddt_object_load(ddt_t *ddt, enum ddt_type type, enum ddt_class class) 97b24ab676SJeff Bonwick { 9830f608a4SGeorge Wilson ddt_object_t *ddo = &ddt->ddt_object_stats[type][class]; 9930f608a4SGeorge Wilson dmu_object_info_t doi; 100b24ab676SJeff Bonwick char name[DDT_NAMELEN]; 101b24ab676SJeff Bonwick int error; 102b24ab676SJeff Bonwick 103b24ab676SJeff Bonwick ddt_object_name(ddt, type, class, name); 104b24ab676SJeff Bonwick 105b24ab676SJeff Bonwick error = zap_lookup(ddt->ddt_os, DMU_POOL_DIRECTORY_OBJECT, name, 106b24ab676SJeff Bonwick sizeof (uint64_t), 1, &ddt->ddt_object[type][class]); 107b24ab676SJeff Bonwick 108b24ab676SJeff Bonwick if (error) 109b24ab676SJeff Bonwick return (error); 110b24ab676SJeff Bonwick 111b24ab676SJeff Bonwick error = zap_lookup(ddt->ddt_os, ddt->ddt_spa->spa_ddt_stat_object, name, 112b24ab676SJeff Bonwick sizeof (uint64_t), sizeof (ddt_histogram_t) / sizeof (uint64_t), 113b24ab676SJeff Bonwick &ddt->ddt_histogram[type][class]); 114b24ab676SJeff Bonwick 11530f608a4SGeorge Wilson /* 11630f608a4SGeorge Wilson * Seed the cached statistics. 11730f608a4SGeorge Wilson */ 11830f608a4SGeorge Wilson VERIFY(ddt_object_info(ddt, type, class, &doi) == 0); 11930f608a4SGeorge Wilson 12030f608a4SGeorge Wilson ddo->ddo_count = ddt_object_count(ddt, type, class); 12130f608a4SGeorge Wilson ddo->ddo_dspace = doi.doi_physical_blocks_512 << 9; 12230f608a4SGeorge Wilson ddo->ddo_mspace = doi.doi_fill_count * doi.doi_data_block_size; 12330f608a4SGeorge Wilson 124b24ab676SJeff Bonwick ASSERT(error == 0); 125b24ab676SJeff Bonwick return (error); 126b24ab676SJeff Bonwick } 127b24ab676SJeff Bonwick 128b24ab676SJeff Bonwick static void 129b24ab676SJeff Bonwick ddt_object_sync(ddt_t *ddt, enum ddt_type type, enum ddt_class class, 130b24ab676SJeff Bonwick dmu_tx_t *tx) 131b24ab676SJeff Bonwick { 13230f608a4SGeorge Wilson ddt_object_t *ddo = &ddt->ddt_object_stats[type][class]; 13330f608a4SGeorge Wilson dmu_object_info_t doi; 134b24ab676SJeff Bonwick char name[DDT_NAMELEN]; 135b24ab676SJeff Bonwick 136b24ab676SJeff Bonwick ddt_object_name(ddt, type, class, name); 137b24ab676SJeff Bonwick 138b24ab676SJeff Bonwick VERIFY(zap_update(ddt->ddt_os, ddt->ddt_spa->spa_ddt_stat_object, name, 139b24ab676SJeff Bonwick sizeof (uint64_t), sizeof (ddt_histogram_t) / sizeof (uint64_t), 140b24ab676SJeff Bonwick &ddt->ddt_histogram[type][class], tx) == 0); 14130f608a4SGeorge Wilson 14230f608a4SGeorge Wilson /* 14330f608a4SGeorge Wilson * Cache DDT statistics; this is the only time they'll change. 14430f608a4SGeorge Wilson */ 14530f608a4SGeorge Wilson VERIFY(ddt_object_info(ddt, type, class, &doi) == 0); 14630f608a4SGeorge Wilson 14730f608a4SGeorge Wilson ddo->ddo_count = ddt_object_count(ddt, type, class); 14830f608a4SGeorge Wilson ddo->ddo_dspace = doi.doi_physical_blocks_512 << 9; 14930f608a4SGeorge Wilson ddo->ddo_mspace = doi.doi_fill_count * doi.doi_data_block_size; 150b24ab676SJeff Bonwick } 151b24ab676SJeff Bonwick 152b24ab676SJeff Bonwick static int 153b24ab676SJeff Bonwick ddt_object_lookup(ddt_t *ddt, enum ddt_type type, enum ddt_class class, 154b24ab676SJeff Bonwick ddt_entry_t *dde) 155b24ab676SJeff Bonwick { 156b24ab676SJeff Bonwick if (!ddt_object_exists(ddt, type, class)) 157b24ab676SJeff Bonwick return (ENOENT); 158b24ab676SJeff Bonwick 159b24ab676SJeff Bonwick return (ddt_ops[type]->ddt_op_lookup(ddt->ddt_os, 160b24ab676SJeff Bonwick ddt->ddt_object[type][class], dde)); 161b24ab676SJeff Bonwick } 162b24ab676SJeff Bonwick 163*3f9d6ad7SLin Ling int 164b24ab676SJeff Bonwick ddt_object_update(ddt_t *ddt, enum ddt_type type, enum ddt_class class, 165b24ab676SJeff Bonwick ddt_entry_t *dde, dmu_tx_t *tx) 166b24ab676SJeff Bonwick { 167b24ab676SJeff Bonwick ASSERT(ddt_object_exists(ddt, type, class)); 168b24ab676SJeff Bonwick 169b24ab676SJeff Bonwick return (ddt_ops[type]->ddt_op_update(ddt->ddt_os, 170b24ab676SJeff Bonwick ddt->ddt_object[type][class], dde, tx)); 171b24ab676SJeff Bonwick } 172b24ab676SJeff Bonwick 173b24ab676SJeff Bonwick static int 174b24ab676SJeff Bonwick ddt_object_remove(ddt_t *ddt, enum ddt_type type, enum ddt_class class, 175b24ab676SJeff Bonwick ddt_entry_t *dde, dmu_tx_t *tx) 176b24ab676SJeff Bonwick { 177b24ab676SJeff Bonwick ASSERT(ddt_object_exists(ddt, type, class)); 178b24ab676SJeff Bonwick 179b24ab676SJeff Bonwick return (ddt_ops[type]->ddt_op_remove(ddt->ddt_os, 180b24ab676SJeff Bonwick ddt->ddt_object[type][class], dde, tx)); 181b24ab676SJeff Bonwick } 182b24ab676SJeff Bonwick 183b24ab676SJeff Bonwick int 184b24ab676SJeff Bonwick ddt_object_walk(ddt_t *ddt, enum ddt_type type, enum ddt_class class, 185bbfd46c4SJeff Bonwick uint64_t *walk, ddt_entry_t *dde) 186b24ab676SJeff Bonwick { 187b24ab676SJeff Bonwick ASSERT(ddt_object_exists(ddt, type, class)); 188b24ab676SJeff Bonwick 189b24ab676SJeff Bonwick return (ddt_ops[type]->ddt_op_walk(ddt->ddt_os, 190b24ab676SJeff Bonwick ddt->ddt_object[type][class], dde, walk)); 191b24ab676SJeff Bonwick } 192b24ab676SJeff Bonwick 193b24ab676SJeff Bonwick uint64_t 194b24ab676SJeff Bonwick ddt_object_count(ddt_t *ddt, enum ddt_type type, enum ddt_class class) 195b24ab676SJeff Bonwick { 196b24ab676SJeff Bonwick ASSERT(ddt_object_exists(ddt, type, class)); 197b24ab676SJeff Bonwick 198b24ab676SJeff Bonwick return (ddt_ops[type]->ddt_op_count(ddt->ddt_os, 199b24ab676SJeff Bonwick ddt->ddt_object[type][class])); 200b24ab676SJeff Bonwick } 201b24ab676SJeff Bonwick 202b24ab676SJeff Bonwick int 203b24ab676SJeff Bonwick ddt_object_info(ddt_t *ddt, enum ddt_type type, enum ddt_class class, 204b24ab676SJeff Bonwick dmu_object_info_t *doi) 205b24ab676SJeff Bonwick { 206b24ab676SJeff Bonwick if (!ddt_object_exists(ddt, type, class)) 207b24ab676SJeff Bonwick return (ENOENT); 208b24ab676SJeff Bonwick 209b24ab676SJeff Bonwick return (dmu_object_info(ddt->ddt_os, ddt->ddt_object[type][class], 210b24ab676SJeff Bonwick doi)); 211b24ab676SJeff Bonwick } 212b24ab676SJeff Bonwick 213b24ab676SJeff Bonwick boolean_t 214b24ab676SJeff Bonwick ddt_object_exists(ddt_t *ddt, enum ddt_type type, enum ddt_class class) 215b24ab676SJeff Bonwick { 216b24ab676SJeff Bonwick return (!!ddt->ddt_object[type][class]); 217b24ab676SJeff Bonwick } 218b24ab676SJeff Bonwick 219b24ab676SJeff Bonwick void 220b24ab676SJeff Bonwick ddt_object_name(ddt_t *ddt, enum ddt_type type, enum ddt_class class, 221b24ab676SJeff Bonwick char *name) 222b24ab676SJeff Bonwick { 223b24ab676SJeff Bonwick (void) sprintf(name, DMU_POOL_DDT, 224b24ab676SJeff Bonwick zio_checksum_table[ddt->ddt_checksum].ci_name, 225b24ab676SJeff Bonwick ddt_ops[type]->ddt_op_name, ddt_class_name[class]); 226b24ab676SJeff Bonwick } 227b24ab676SJeff Bonwick 228b24ab676SJeff Bonwick void 229b24ab676SJeff Bonwick ddt_bp_fill(const ddt_phys_t *ddp, blkptr_t *bp, uint64_t txg) 230b24ab676SJeff Bonwick { 231b24ab676SJeff Bonwick ASSERT(txg != 0); 232b24ab676SJeff Bonwick 233b24ab676SJeff Bonwick for (int d = 0; d < SPA_DVAS_PER_BP; d++) 234b24ab676SJeff Bonwick bp->blk_dva[d] = ddp->ddp_dva[d]; 235b24ab676SJeff Bonwick BP_SET_BIRTH(bp, txg, ddp->ddp_phys_birth); 236b24ab676SJeff Bonwick } 237b24ab676SJeff Bonwick 238b24ab676SJeff Bonwick void 239bbfd46c4SJeff Bonwick ddt_bp_create(enum zio_checksum checksum, 240bbfd46c4SJeff Bonwick const ddt_key_t *ddk, const ddt_phys_t *ddp, blkptr_t *bp) 241b24ab676SJeff Bonwick { 242b24ab676SJeff Bonwick BP_ZERO(bp); 243b24ab676SJeff Bonwick 244b24ab676SJeff Bonwick if (ddp != NULL) 245b24ab676SJeff Bonwick ddt_bp_fill(ddp, bp, ddp->ddp_phys_birth); 246b24ab676SJeff Bonwick 247b24ab676SJeff Bonwick bp->blk_cksum = ddk->ddk_cksum; 248*3f9d6ad7SLin Ling bp->blk_fill = 1; 249b24ab676SJeff Bonwick 250b24ab676SJeff Bonwick BP_SET_LSIZE(bp, DDK_GET_LSIZE(ddk)); 251b24ab676SJeff Bonwick BP_SET_PSIZE(bp, DDK_GET_PSIZE(ddk)); 252b24ab676SJeff Bonwick BP_SET_COMPRESS(bp, DDK_GET_COMPRESS(ddk)); 253bbfd46c4SJeff Bonwick BP_SET_CHECKSUM(bp, checksum); 254*3f9d6ad7SLin Ling BP_SET_TYPE(bp, DMU_OT_DEDUP); 255b24ab676SJeff Bonwick BP_SET_LEVEL(bp, 0); 256b24ab676SJeff Bonwick BP_SET_DEDUP(bp, 0); 257b24ab676SJeff Bonwick BP_SET_BYTEORDER(bp, ZFS_HOST_BYTEORDER); 258b24ab676SJeff Bonwick } 259b24ab676SJeff Bonwick 260b24ab676SJeff Bonwick void 261b24ab676SJeff Bonwick ddt_key_fill(ddt_key_t *ddk, const blkptr_t *bp) 262b24ab676SJeff Bonwick { 263b24ab676SJeff Bonwick ddk->ddk_cksum = bp->blk_cksum; 264b24ab676SJeff Bonwick ddk->ddk_prop = 0; 265b24ab676SJeff Bonwick 266b24ab676SJeff Bonwick DDK_SET_LSIZE(ddk, BP_GET_LSIZE(bp)); 267b24ab676SJeff Bonwick DDK_SET_PSIZE(ddk, BP_GET_PSIZE(bp)); 268b24ab676SJeff Bonwick DDK_SET_COMPRESS(ddk, BP_GET_COMPRESS(bp)); 269b24ab676SJeff Bonwick } 270b24ab676SJeff Bonwick 271b24ab676SJeff Bonwick void 272b24ab676SJeff Bonwick ddt_phys_fill(ddt_phys_t *ddp, const blkptr_t *bp) 273b24ab676SJeff Bonwick { 274b24ab676SJeff Bonwick ASSERT(ddp->ddp_phys_birth == 0); 275b24ab676SJeff Bonwick 276b24ab676SJeff Bonwick for (int d = 0; d < SPA_DVAS_PER_BP; d++) 277b24ab676SJeff Bonwick ddp->ddp_dva[d] = bp->blk_dva[d]; 278b24ab676SJeff Bonwick ddp->ddp_phys_birth = BP_PHYSICAL_BIRTH(bp); 279b24ab676SJeff Bonwick } 280b24ab676SJeff Bonwick 281b24ab676SJeff Bonwick void 282b24ab676SJeff Bonwick ddt_phys_clear(ddt_phys_t *ddp) 283b24ab676SJeff Bonwick { 284b24ab676SJeff Bonwick bzero(ddp, sizeof (*ddp)); 285b24ab676SJeff Bonwick } 286b24ab676SJeff Bonwick 287b24ab676SJeff Bonwick void 288b24ab676SJeff Bonwick ddt_phys_addref(ddt_phys_t *ddp) 289b24ab676SJeff Bonwick { 290b24ab676SJeff Bonwick ddp->ddp_refcnt++; 291b24ab676SJeff Bonwick } 292b24ab676SJeff Bonwick 293b24ab676SJeff Bonwick void 294b24ab676SJeff Bonwick ddt_phys_decref(ddt_phys_t *ddp) 295b24ab676SJeff Bonwick { 296b24ab676SJeff Bonwick ASSERT((int64_t)ddp->ddp_refcnt > 0); 297b24ab676SJeff Bonwick ddp->ddp_refcnt--; 298b24ab676SJeff Bonwick } 299b24ab676SJeff Bonwick 300b24ab676SJeff Bonwick void 301b24ab676SJeff Bonwick ddt_phys_free(ddt_t *ddt, ddt_key_t *ddk, ddt_phys_t *ddp, uint64_t txg) 302b24ab676SJeff Bonwick { 303b24ab676SJeff Bonwick blkptr_t blk; 304b24ab676SJeff Bonwick 305bbfd46c4SJeff Bonwick ddt_bp_create(ddt->ddt_checksum, ddk, ddp, &blk); 306b24ab676SJeff Bonwick ddt_phys_clear(ddp); 307b24ab676SJeff Bonwick zio_free(ddt->ddt_spa, txg, &blk); 308b24ab676SJeff Bonwick } 309b24ab676SJeff Bonwick 310b24ab676SJeff Bonwick ddt_phys_t * 311b24ab676SJeff Bonwick ddt_phys_select(const ddt_entry_t *dde, const blkptr_t *bp) 312b24ab676SJeff Bonwick { 313b24ab676SJeff Bonwick ddt_phys_t *ddp = (ddt_phys_t *)dde->dde_phys; 314b24ab676SJeff Bonwick 315b24ab676SJeff Bonwick for (int p = 0; p < DDT_PHYS_TYPES; p++, ddp++) { 316b24ab676SJeff Bonwick if (DVA_EQUAL(BP_IDENTITY(bp), &ddp->ddp_dva[0]) && 317b24ab676SJeff Bonwick BP_PHYSICAL_BIRTH(bp) == ddp->ddp_phys_birth) 318b24ab676SJeff Bonwick return (ddp); 319b24ab676SJeff Bonwick } 320b24ab676SJeff Bonwick return (NULL); 321b24ab676SJeff Bonwick } 322b24ab676SJeff Bonwick 323b24ab676SJeff Bonwick uint64_t 324b24ab676SJeff Bonwick ddt_phys_total_refcnt(const ddt_entry_t *dde) 325b24ab676SJeff Bonwick { 326b24ab676SJeff Bonwick uint64_t refcnt = 0; 327b24ab676SJeff Bonwick 328b24ab676SJeff Bonwick for (int p = DDT_PHYS_SINGLE; p <= DDT_PHYS_TRIPLE; p++) 329b24ab676SJeff Bonwick refcnt += dde->dde_phys[p].ddp_refcnt; 330b24ab676SJeff Bonwick 331b24ab676SJeff Bonwick return (refcnt); 332b24ab676SJeff Bonwick } 333b24ab676SJeff Bonwick 334b24ab676SJeff Bonwick static void 335b24ab676SJeff Bonwick ddt_stat_generate(ddt_t *ddt, ddt_entry_t *dde, ddt_stat_t *dds) 336b24ab676SJeff Bonwick { 337b24ab676SJeff Bonwick spa_t *spa = ddt->ddt_spa; 338b24ab676SJeff Bonwick ddt_phys_t *ddp = dde->dde_phys; 339b24ab676SJeff Bonwick ddt_key_t *ddk = &dde->dde_key; 340b24ab676SJeff Bonwick uint64_t lsize = DDK_GET_LSIZE(ddk); 341b24ab676SJeff Bonwick uint64_t psize = DDK_GET_PSIZE(ddk); 342b24ab676SJeff Bonwick 343b24ab676SJeff Bonwick bzero(dds, sizeof (*dds)); 344b24ab676SJeff Bonwick 345b24ab676SJeff Bonwick for (int p = 0; p < DDT_PHYS_TYPES; p++, ddp++) { 346b24ab676SJeff Bonwick uint64_t dsize = 0; 347b24ab676SJeff Bonwick uint64_t refcnt = ddp->ddp_refcnt; 348b24ab676SJeff Bonwick 349b24ab676SJeff Bonwick if (ddp->ddp_phys_birth == 0) 350b24ab676SJeff Bonwick continue; 351b24ab676SJeff Bonwick 352b24ab676SJeff Bonwick for (int d = 0; d < SPA_DVAS_PER_BP; d++) 353b24ab676SJeff Bonwick dsize += dva_get_dsize_sync(spa, &ddp->ddp_dva[d]); 354b24ab676SJeff Bonwick 355b24ab676SJeff Bonwick dds->dds_blocks += 1; 356b24ab676SJeff Bonwick dds->dds_lsize += lsize; 357b24ab676SJeff Bonwick dds->dds_psize += psize; 358b24ab676SJeff Bonwick dds->dds_dsize += dsize; 359b24ab676SJeff Bonwick 360b24ab676SJeff Bonwick dds->dds_ref_blocks += refcnt; 361b24ab676SJeff Bonwick dds->dds_ref_lsize += lsize * refcnt; 362b24ab676SJeff Bonwick dds->dds_ref_psize += psize * refcnt; 363b24ab676SJeff Bonwick dds->dds_ref_dsize += dsize * refcnt; 364b24ab676SJeff Bonwick } 365b24ab676SJeff Bonwick } 366b24ab676SJeff Bonwick 367b24ab676SJeff Bonwick void 368b24ab676SJeff Bonwick ddt_stat_add(ddt_stat_t *dst, const ddt_stat_t *src, uint64_t neg) 369b24ab676SJeff Bonwick { 370b24ab676SJeff Bonwick const uint64_t *s = (const uint64_t *)src; 371b24ab676SJeff Bonwick uint64_t *d = (uint64_t *)dst; 372b24ab676SJeff Bonwick uint64_t *d_end = (uint64_t *)(dst + 1); 373b24ab676SJeff Bonwick 374b24ab676SJeff Bonwick ASSERT(neg == 0 || neg == -1ULL); /* add or subtract */ 375b24ab676SJeff Bonwick 376b24ab676SJeff Bonwick while (d < d_end) 377b24ab676SJeff Bonwick *d++ += (*s++ ^ neg) - neg; 378b24ab676SJeff Bonwick } 379b24ab676SJeff Bonwick 380b24ab676SJeff Bonwick static void 381b24ab676SJeff Bonwick ddt_stat_update(ddt_t *ddt, ddt_entry_t *dde, uint64_t neg) 382b24ab676SJeff Bonwick { 383b24ab676SJeff Bonwick ddt_stat_t dds; 384b24ab676SJeff Bonwick ddt_histogram_t *ddh; 385b24ab676SJeff Bonwick int bucket; 386b24ab676SJeff Bonwick 387b24ab676SJeff Bonwick ddt_stat_generate(ddt, dde, &dds); 388b24ab676SJeff Bonwick 389b24ab676SJeff Bonwick bucket = highbit(dds.dds_ref_blocks) - 1; 390b24ab676SJeff Bonwick ASSERT(bucket >= 0); 391b24ab676SJeff Bonwick 392b24ab676SJeff Bonwick ddh = &ddt->ddt_histogram[dde->dde_type][dde->dde_class]; 393b24ab676SJeff Bonwick 394b24ab676SJeff Bonwick ddt_stat_add(&ddh->ddh_stat[bucket], &dds, neg); 395b24ab676SJeff Bonwick } 396b24ab676SJeff Bonwick 397b24ab676SJeff Bonwick void 398b24ab676SJeff Bonwick ddt_histogram_add(ddt_histogram_t *dst, const ddt_histogram_t *src) 399b24ab676SJeff Bonwick { 400b24ab676SJeff Bonwick for (int h = 0; h < 64; h++) 401b24ab676SJeff Bonwick ddt_stat_add(&dst->ddh_stat[h], &src->ddh_stat[h], 0); 402b24ab676SJeff Bonwick } 403b24ab676SJeff Bonwick 404b24ab676SJeff Bonwick void 405b24ab676SJeff Bonwick ddt_histogram_stat(ddt_stat_t *dds, const ddt_histogram_t *ddh) 406b24ab676SJeff Bonwick { 407b24ab676SJeff Bonwick bzero(dds, sizeof (*dds)); 408b24ab676SJeff Bonwick 409b24ab676SJeff Bonwick for (int h = 0; h < 64; h++) 410b24ab676SJeff Bonwick ddt_stat_add(dds, &ddh->ddh_stat[h], 0); 411b24ab676SJeff Bonwick } 412b24ab676SJeff Bonwick 413b24ab676SJeff Bonwick boolean_t 414b24ab676SJeff Bonwick ddt_histogram_empty(const ddt_histogram_t *ddh) 415b24ab676SJeff Bonwick { 416b24ab676SJeff Bonwick const uint64_t *s = (const uint64_t *)ddh; 417b24ab676SJeff Bonwick const uint64_t *s_end = (const uint64_t *)(ddh + 1); 418b24ab676SJeff Bonwick 419b24ab676SJeff Bonwick while (s < s_end) 420b24ab676SJeff Bonwick if (*s++ != 0) 421b24ab676SJeff Bonwick return (B_FALSE); 422b24ab676SJeff Bonwick 423b24ab676SJeff Bonwick return (B_TRUE); 424b24ab676SJeff Bonwick } 425b24ab676SJeff Bonwick 4269eb19f4dSGeorge Wilson void 42730f608a4SGeorge Wilson ddt_get_dedup_object_stats(spa_t *spa, ddt_object_t *ddo_total) 428b24ab676SJeff Bonwick { 42930f608a4SGeorge Wilson /* Sum the statistics we cached in ddt_object_sync(). */ 430b24ab676SJeff Bonwick for (enum zio_checksum c = 0; c < ZIO_CHECKSUM_FUNCTIONS; c++) { 431b24ab676SJeff Bonwick ddt_t *ddt = spa->spa_ddt[c]; 432b24ab676SJeff Bonwick for (enum ddt_type type = 0; type < DDT_TYPES; type++) { 433b24ab676SJeff Bonwick for (enum ddt_class class = 0; class < DDT_CLASSES; 434b24ab676SJeff Bonwick class++) { 43530f608a4SGeorge Wilson ddt_object_t *ddo = 43630f608a4SGeorge Wilson &ddt->ddt_object_stats[type][class]; 43730f608a4SGeorge Wilson ddo_total->ddo_count += ddo->ddo_count; 43830f608a4SGeorge Wilson ddo_total->ddo_dspace += ddo->ddo_dspace; 43930f608a4SGeorge Wilson ddo_total->ddo_mspace += ddo->ddo_mspace; 4409eb19f4dSGeorge Wilson } 4419eb19f4dSGeorge Wilson } 4429eb19f4dSGeorge Wilson } 44330f608a4SGeorge Wilson 44430f608a4SGeorge Wilson /* ... and compute the averages. */ 44530f608a4SGeorge Wilson if (ddo_total->ddo_count != 0) { 44630f608a4SGeorge Wilson ddo_total->ddo_dspace /= ddo_total->ddo_count; 44730f608a4SGeorge Wilson ddo_total->ddo_mspace /= ddo_total->ddo_count; 44830f608a4SGeorge Wilson } else { 44930f608a4SGeorge Wilson ASSERT(ddo_total->ddo_dspace == 0); 45030f608a4SGeorge Wilson ASSERT(ddo_total->ddo_mspace == 0); 45130f608a4SGeorge Wilson } 4529eb19f4dSGeorge Wilson } 4539eb19f4dSGeorge Wilson 4549eb19f4dSGeorge Wilson void 4559eb19f4dSGeorge Wilson ddt_get_dedup_histogram(spa_t *spa, ddt_histogram_t *ddh) 4569eb19f4dSGeorge Wilson { 4579eb19f4dSGeorge Wilson for (enum zio_checksum c = 0; c < ZIO_CHECKSUM_FUNCTIONS; c++) { 4589eb19f4dSGeorge Wilson ddt_t *ddt = spa->spa_ddt[c]; 4599eb19f4dSGeorge Wilson for (enum ddt_type type = 0; type < DDT_TYPES; type++) { 4609eb19f4dSGeorge Wilson for (enum ddt_class class = 0; class < DDT_CLASSES; 4619eb19f4dSGeorge Wilson class++) { 4629eb19f4dSGeorge Wilson ddt_histogram_add(ddh, 46330f608a4SGeorge Wilson &ddt->ddt_histogram_cache[type][class]); 464b24ab676SJeff Bonwick } 465b24ab676SJeff Bonwick } 466b24ab676SJeff Bonwick } 4679eb19f4dSGeorge Wilson } 4689eb19f4dSGeorge Wilson 4699eb19f4dSGeorge Wilson void 4709eb19f4dSGeorge Wilson ddt_get_dedup_stats(spa_t *spa, ddt_stat_t *dds_total) 4719eb19f4dSGeorge Wilson { 4729eb19f4dSGeorge Wilson ddt_histogram_t *ddh_total; 473b24ab676SJeff Bonwick 4749eb19f4dSGeorge Wilson ddh_total = kmem_zalloc(sizeof (ddt_histogram_t), KM_SLEEP); 4759eb19f4dSGeorge Wilson ddt_get_dedup_histogram(spa, ddh_total); 4769eb19f4dSGeorge Wilson ddt_histogram_stat(dds_total, ddh_total); 4779eb19f4dSGeorge Wilson kmem_free(ddh_total, sizeof (ddt_histogram_t)); 478485bbbf5SGeorge Wilson } 479485bbbf5SGeorge Wilson 480485bbbf5SGeorge Wilson uint64_t 481485bbbf5SGeorge Wilson ddt_get_dedup_dspace(spa_t *spa) 482485bbbf5SGeorge Wilson { 483485bbbf5SGeorge Wilson ddt_stat_t dds_total = { 0 }; 484485bbbf5SGeorge Wilson 485485bbbf5SGeorge Wilson ddt_get_dedup_stats(spa, &dds_total); 486485bbbf5SGeorge Wilson return (dds_total.dds_ref_dsize - dds_total.dds_dsize); 487485bbbf5SGeorge Wilson } 488485bbbf5SGeorge Wilson 489485bbbf5SGeorge Wilson uint64_t 490485bbbf5SGeorge Wilson ddt_get_pool_dedup_ratio(spa_t *spa) 491485bbbf5SGeorge Wilson { 492485bbbf5SGeorge Wilson ddt_stat_t dds_total = { 0 }; 493b24ab676SJeff Bonwick 494485bbbf5SGeorge Wilson ddt_get_dedup_stats(spa, &dds_total); 495b24ab676SJeff Bonwick if (dds_total.dds_dsize == 0) 496b24ab676SJeff Bonwick return (100); 497b24ab676SJeff Bonwick 498b24ab676SJeff Bonwick return (dds_total.dds_ref_dsize * 100 / dds_total.dds_dsize); 499b24ab676SJeff Bonwick } 500b24ab676SJeff Bonwick 501b24ab676SJeff Bonwick int 502b24ab676SJeff Bonwick ddt_ditto_copies_needed(ddt_t *ddt, ddt_entry_t *dde, ddt_phys_t *ddp_willref) 503b24ab676SJeff Bonwick { 504b24ab676SJeff Bonwick spa_t *spa = ddt->ddt_spa; 505b24ab676SJeff Bonwick uint64_t total_refcnt = 0; 506b24ab676SJeff Bonwick uint64_t ditto = spa->spa_dedup_ditto; 507b24ab676SJeff Bonwick int total_copies = 0; 508b24ab676SJeff Bonwick int desired_copies = 0; 509b24ab676SJeff Bonwick 510b24ab676SJeff Bonwick for (int p = DDT_PHYS_SINGLE; p <= DDT_PHYS_TRIPLE; p++) { 511b24ab676SJeff Bonwick ddt_phys_t *ddp = &dde->dde_phys[p]; 512b24ab676SJeff Bonwick zio_t *zio = dde->dde_lead_zio[p]; 513b24ab676SJeff Bonwick uint64_t refcnt = ddp->ddp_refcnt; /* committed refs */ 514b24ab676SJeff Bonwick if (zio != NULL) 515b24ab676SJeff Bonwick refcnt += zio->io_parent_count; /* pending refs */ 516b24ab676SJeff Bonwick if (ddp == ddp_willref) 517b24ab676SJeff Bonwick refcnt++; /* caller's ref */ 518b24ab676SJeff Bonwick if (refcnt != 0) { 519b24ab676SJeff Bonwick total_refcnt += refcnt; 520b24ab676SJeff Bonwick total_copies += p; 521b24ab676SJeff Bonwick } 522b24ab676SJeff Bonwick } 523b24ab676SJeff Bonwick 524b24ab676SJeff Bonwick if (ditto == 0 || ditto > UINT32_MAX) 525b24ab676SJeff Bonwick ditto = UINT32_MAX; 526b24ab676SJeff Bonwick 527b24ab676SJeff Bonwick if (total_refcnt >= 1) 528b24ab676SJeff Bonwick desired_copies++; 529b24ab676SJeff Bonwick if (total_refcnt >= ditto) 530b24ab676SJeff Bonwick desired_copies++; 531b24ab676SJeff Bonwick if (total_refcnt >= ditto * ditto) 532b24ab676SJeff Bonwick desired_copies++; 533b24ab676SJeff Bonwick 534b24ab676SJeff Bonwick return (MAX(desired_copies, total_copies) - total_copies); 535b24ab676SJeff Bonwick } 536b24ab676SJeff Bonwick 537b24ab676SJeff Bonwick int 538b24ab676SJeff Bonwick ddt_ditto_copies_present(ddt_entry_t *dde) 539b24ab676SJeff Bonwick { 540b24ab676SJeff Bonwick ddt_phys_t *ddp = &dde->dde_phys[DDT_PHYS_DITTO]; 541b24ab676SJeff Bonwick dva_t *dva = ddp->ddp_dva; 542b24ab676SJeff Bonwick int copies = 0 - DVA_GET_GANG(dva); 543b24ab676SJeff Bonwick 544b24ab676SJeff Bonwick for (int d = 0; d < SPA_DVAS_PER_BP; d++, dva++) 545b24ab676SJeff Bonwick if (DVA_IS_VALID(dva)) 546b24ab676SJeff Bonwick copies++; 547b24ab676SJeff Bonwick 548b24ab676SJeff Bonwick ASSERT(copies >= 0 && copies < SPA_DVAS_PER_BP); 549b24ab676SJeff Bonwick 550b24ab676SJeff Bonwick return (copies); 551b24ab676SJeff Bonwick } 552b24ab676SJeff Bonwick 553b24ab676SJeff Bonwick size_t 554b24ab676SJeff Bonwick ddt_compress(void *src, uchar_t *dst, size_t s_len, size_t d_len) 555b24ab676SJeff Bonwick { 556b24ab676SJeff Bonwick uchar_t *version = dst++; 557b24ab676SJeff Bonwick int cpfunc = ZIO_COMPRESS_ZLE; 558b24ab676SJeff Bonwick zio_compress_info_t *ci = &zio_compress_table[cpfunc]; 559b24ab676SJeff Bonwick size_t c_len; 560b24ab676SJeff Bonwick 561b24ab676SJeff Bonwick ASSERT(d_len >= s_len + 1); /* no compression plus version byte */ 562b24ab676SJeff Bonwick 563b24ab676SJeff Bonwick c_len = ci->ci_compress(src, dst, s_len, d_len - 1, ci->ci_level); 564b24ab676SJeff Bonwick 565b24ab676SJeff Bonwick if (c_len == s_len) { 566b24ab676SJeff Bonwick cpfunc = ZIO_COMPRESS_OFF; 567b24ab676SJeff Bonwick bcopy(src, dst, s_len); 568b24ab676SJeff Bonwick } 569b24ab676SJeff Bonwick 570b24ab676SJeff Bonwick *version = (ZFS_HOST_BYTEORDER & DDT_COMPRESS_BYTEORDER_MASK) | cpfunc; 571b24ab676SJeff Bonwick 572b24ab676SJeff Bonwick return (c_len + 1); 573b24ab676SJeff Bonwick } 574b24ab676SJeff Bonwick 575b24ab676SJeff Bonwick void 576b24ab676SJeff Bonwick ddt_decompress(uchar_t *src, void *dst, size_t s_len, size_t d_len) 577b24ab676SJeff Bonwick { 578b24ab676SJeff Bonwick uchar_t version = *src++; 579b24ab676SJeff Bonwick int cpfunc = version & DDT_COMPRESS_FUNCTION_MASK; 580b24ab676SJeff Bonwick zio_compress_info_t *ci = &zio_compress_table[cpfunc]; 581b24ab676SJeff Bonwick 582b24ab676SJeff Bonwick if (ci->ci_decompress != NULL) 583b24ab676SJeff Bonwick (void) ci->ci_decompress(src, dst, s_len, d_len, ci->ci_level); 584b24ab676SJeff Bonwick else 585b24ab676SJeff Bonwick bcopy(src, dst, d_len); 586b24ab676SJeff Bonwick 587b24ab676SJeff Bonwick if ((version ^ ZFS_HOST_BYTEORDER) & DDT_COMPRESS_BYTEORDER_MASK) 588b24ab676SJeff Bonwick byteswap_uint64_array(dst, d_len); 589b24ab676SJeff Bonwick } 590b24ab676SJeff Bonwick 591b24ab676SJeff Bonwick ddt_t * 592b24ab676SJeff Bonwick ddt_select_by_checksum(spa_t *spa, enum zio_checksum c) 593b24ab676SJeff Bonwick { 594b24ab676SJeff Bonwick return (spa->spa_ddt[c]); 595b24ab676SJeff Bonwick } 596b24ab676SJeff Bonwick 597b24ab676SJeff Bonwick ddt_t * 598b24ab676SJeff Bonwick ddt_select(spa_t *spa, const blkptr_t *bp) 599b24ab676SJeff Bonwick { 600b24ab676SJeff Bonwick return (spa->spa_ddt[BP_GET_CHECKSUM(bp)]); 601b24ab676SJeff Bonwick } 602b24ab676SJeff Bonwick 603b24ab676SJeff Bonwick void 604b24ab676SJeff Bonwick ddt_enter(ddt_t *ddt) 605b24ab676SJeff Bonwick { 606b24ab676SJeff Bonwick mutex_enter(&ddt->ddt_lock); 607b24ab676SJeff Bonwick } 608b24ab676SJeff Bonwick 609b24ab676SJeff Bonwick void 610b24ab676SJeff Bonwick ddt_exit(ddt_t *ddt) 611b24ab676SJeff Bonwick { 612b24ab676SJeff Bonwick mutex_exit(&ddt->ddt_lock); 613b24ab676SJeff Bonwick } 614b24ab676SJeff Bonwick 615b24ab676SJeff Bonwick static ddt_entry_t * 616b24ab676SJeff Bonwick ddt_alloc(const ddt_key_t *ddk) 617b24ab676SJeff Bonwick { 618b24ab676SJeff Bonwick ddt_entry_t *dde; 619b24ab676SJeff Bonwick 620b24ab676SJeff Bonwick dde = kmem_zalloc(sizeof (ddt_entry_t), KM_SLEEP); 621b24ab676SJeff Bonwick cv_init(&dde->dde_cv, NULL, CV_DEFAULT, NULL); 622b24ab676SJeff Bonwick 623b24ab676SJeff Bonwick dde->dde_key = *ddk; 624b24ab676SJeff Bonwick 625b24ab676SJeff Bonwick return (dde); 626b24ab676SJeff Bonwick } 627b24ab676SJeff Bonwick 628b24ab676SJeff Bonwick static void 629b24ab676SJeff Bonwick ddt_free(ddt_entry_t *dde) 630b24ab676SJeff Bonwick { 631b24ab676SJeff Bonwick ASSERT(!dde->dde_loading); 632b24ab676SJeff Bonwick 633b24ab676SJeff Bonwick for (int p = 0; p < DDT_PHYS_TYPES; p++) 634b24ab676SJeff Bonwick ASSERT(dde->dde_lead_zio[p] == NULL); 635b24ab676SJeff Bonwick 636b24ab676SJeff Bonwick if (dde->dde_repair_data != NULL) 637b24ab676SJeff Bonwick zio_buf_free(dde->dde_repair_data, 638b24ab676SJeff Bonwick DDK_GET_PSIZE(&dde->dde_key)); 639b24ab676SJeff Bonwick 640b24ab676SJeff Bonwick cv_destroy(&dde->dde_cv); 641b24ab676SJeff Bonwick kmem_free(dde, sizeof (*dde)); 642b24ab676SJeff Bonwick } 643b24ab676SJeff Bonwick 644b24ab676SJeff Bonwick void 645b24ab676SJeff Bonwick ddt_remove(ddt_t *ddt, ddt_entry_t *dde) 646b24ab676SJeff Bonwick { 647b24ab676SJeff Bonwick ASSERT(MUTEX_HELD(&ddt->ddt_lock)); 648b24ab676SJeff Bonwick 649b24ab676SJeff Bonwick avl_remove(&ddt->ddt_tree, dde); 650b24ab676SJeff Bonwick ddt_free(dde); 651b24ab676SJeff Bonwick } 652b24ab676SJeff Bonwick 653b24ab676SJeff Bonwick ddt_entry_t * 654b24ab676SJeff Bonwick ddt_lookup(ddt_t *ddt, const blkptr_t *bp, boolean_t add) 655b24ab676SJeff Bonwick { 656b24ab676SJeff Bonwick ddt_entry_t *dde, dde_search; 657b24ab676SJeff Bonwick enum ddt_type type; 658b24ab676SJeff Bonwick enum ddt_class class; 659b24ab676SJeff Bonwick avl_index_t where; 660b24ab676SJeff Bonwick int error; 661b24ab676SJeff Bonwick 662b24ab676SJeff Bonwick ASSERT(MUTEX_HELD(&ddt->ddt_lock)); 663b24ab676SJeff Bonwick 664b24ab676SJeff Bonwick ddt_key_fill(&dde_search.dde_key, bp); 665b24ab676SJeff Bonwick 666b24ab676SJeff Bonwick dde = avl_find(&ddt->ddt_tree, &dde_search, &where); 667b24ab676SJeff Bonwick if (dde == NULL) { 668b24ab676SJeff Bonwick if (!add) 669b24ab676SJeff Bonwick return (NULL); 670b24ab676SJeff Bonwick dde = ddt_alloc(&dde_search.dde_key); 671b24ab676SJeff Bonwick avl_insert(&ddt->ddt_tree, dde, where); 672b24ab676SJeff Bonwick } 673b24ab676SJeff Bonwick 674b24ab676SJeff Bonwick while (dde->dde_loading) 675b24ab676SJeff Bonwick cv_wait(&dde->dde_cv, &ddt->ddt_lock); 676b24ab676SJeff Bonwick 677b24ab676SJeff Bonwick if (dde->dde_loaded) 678b24ab676SJeff Bonwick return (dde); 679b24ab676SJeff Bonwick 680b24ab676SJeff Bonwick dde->dde_loading = B_TRUE; 681b24ab676SJeff Bonwick 682b24ab676SJeff Bonwick ddt_exit(ddt); 683b24ab676SJeff Bonwick 684b24ab676SJeff Bonwick error = ENOENT; 685b24ab676SJeff Bonwick 686b24ab676SJeff Bonwick for (type = 0; type < DDT_TYPES; type++) { 687b24ab676SJeff Bonwick for (class = 0; class < DDT_CLASSES; class++) { 688b24ab676SJeff Bonwick error = ddt_object_lookup(ddt, type, class, dde); 689b24ab676SJeff Bonwick if (error != ENOENT) 690b24ab676SJeff Bonwick break; 691b24ab676SJeff Bonwick } 692b24ab676SJeff Bonwick if (error != ENOENT) 693b24ab676SJeff Bonwick break; 694b24ab676SJeff Bonwick } 695b24ab676SJeff Bonwick 696b24ab676SJeff Bonwick ASSERT(error == 0 || error == ENOENT); 697b24ab676SJeff Bonwick 698b24ab676SJeff Bonwick ddt_enter(ddt); 699b24ab676SJeff Bonwick 700b24ab676SJeff Bonwick ASSERT(dde->dde_loaded == B_FALSE); 701b24ab676SJeff Bonwick ASSERT(dde->dde_loading == B_TRUE); 702b24ab676SJeff Bonwick 703b24ab676SJeff Bonwick dde->dde_type = type; /* will be DDT_TYPES if no entry found */ 704b24ab676SJeff Bonwick dde->dde_class = class; /* will be DDT_CLASSES if no entry found */ 705b24ab676SJeff Bonwick dde->dde_loaded = B_TRUE; 706b24ab676SJeff Bonwick dde->dde_loading = B_FALSE; 707b24ab676SJeff Bonwick 708b24ab676SJeff Bonwick if (error == 0) 709b24ab676SJeff Bonwick ddt_stat_update(ddt, dde, -1ULL); 710b24ab676SJeff Bonwick 711b24ab676SJeff Bonwick cv_broadcast(&dde->dde_cv); 712b24ab676SJeff Bonwick 713b24ab676SJeff Bonwick return (dde); 714b24ab676SJeff Bonwick } 715b24ab676SJeff Bonwick 716b24ab676SJeff Bonwick int 717b24ab676SJeff Bonwick ddt_entry_compare(const void *x1, const void *x2) 718b24ab676SJeff Bonwick { 719b24ab676SJeff Bonwick const ddt_entry_t *dde1 = x1; 720b24ab676SJeff Bonwick const ddt_entry_t *dde2 = x2; 721b24ab676SJeff Bonwick const uint64_t *u1 = (const uint64_t *)&dde1->dde_key; 722b24ab676SJeff Bonwick const uint64_t *u2 = (const uint64_t *)&dde2->dde_key; 723b24ab676SJeff Bonwick 724b24ab676SJeff Bonwick for (int i = 0; i < DDT_KEY_WORDS; i++) { 725b24ab676SJeff Bonwick if (u1[i] < u2[i]) 726b24ab676SJeff Bonwick return (-1); 727b24ab676SJeff Bonwick if (u1[i] > u2[i]) 728b24ab676SJeff Bonwick return (1); 729b24ab676SJeff Bonwick } 730b24ab676SJeff Bonwick 731b24ab676SJeff Bonwick return (0); 732b24ab676SJeff Bonwick } 733b24ab676SJeff Bonwick 734b24ab676SJeff Bonwick static ddt_t * 735b24ab676SJeff Bonwick ddt_table_alloc(spa_t *spa, enum zio_checksum c) 736b24ab676SJeff Bonwick { 737b24ab676SJeff Bonwick ddt_t *ddt; 738b24ab676SJeff Bonwick 739b24ab676SJeff Bonwick ddt = kmem_zalloc(sizeof (*ddt), KM_SLEEP); 740b24ab676SJeff Bonwick 741b24ab676SJeff Bonwick mutex_init(&ddt->ddt_lock, NULL, MUTEX_DEFAULT, NULL); 742b24ab676SJeff Bonwick avl_create(&ddt->ddt_tree, ddt_entry_compare, 743b24ab676SJeff Bonwick sizeof (ddt_entry_t), offsetof(ddt_entry_t, dde_node)); 744b24ab676SJeff Bonwick avl_create(&ddt->ddt_repair_tree, ddt_entry_compare, 745b24ab676SJeff Bonwick sizeof (ddt_entry_t), offsetof(ddt_entry_t, dde_node)); 746b24ab676SJeff Bonwick ddt->ddt_checksum = c; 747b24ab676SJeff Bonwick ddt->ddt_spa = spa; 748b24ab676SJeff Bonwick ddt->ddt_os = spa->spa_meta_objset; 749b24ab676SJeff Bonwick 750b24ab676SJeff Bonwick return (ddt); 751b24ab676SJeff Bonwick } 752b24ab676SJeff Bonwick 753b24ab676SJeff Bonwick static void 754b24ab676SJeff Bonwick ddt_table_free(ddt_t *ddt) 755b24ab676SJeff Bonwick { 756b24ab676SJeff Bonwick ASSERT(avl_numnodes(&ddt->ddt_tree) == 0); 757b24ab676SJeff Bonwick ASSERT(avl_numnodes(&ddt->ddt_repair_tree) == 0); 758b24ab676SJeff Bonwick avl_destroy(&ddt->ddt_tree); 759b24ab676SJeff Bonwick avl_destroy(&ddt->ddt_repair_tree); 760b24ab676SJeff Bonwick mutex_destroy(&ddt->ddt_lock); 761b24ab676SJeff Bonwick kmem_free(ddt, sizeof (*ddt)); 762b24ab676SJeff Bonwick } 763b24ab676SJeff Bonwick 764b24ab676SJeff Bonwick void 765b24ab676SJeff Bonwick ddt_create(spa_t *spa) 766b24ab676SJeff Bonwick { 767b24ab676SJeff Bonwick spa->spa_dedup_checksum = ZIO_DEDUPCHECKSUM; 768b24ab676SJeff Bonwick 769b24ab676SJeff Bonwick for (enum zio_checksum c = 0; c < ZIO_CHECKSUM_FUNCTIONS; c++) 770b24ab676SJeff Bonwick spa->spa_ddt[c] = ddt_table_alloc(spa, c); 771b24ab676SJeff Bonwick } 772b24ab676SJeff Bonwick 773b24ab676SJeff Bonwick int 774b24ab676SJeff Bonwick ddt_load(spa_t *spa) 775b24ab676SJeff Bonwick { 776b24ab676SJeff Bonwick int error; 777b24ab676SJeff Bonwick 778b24ab676SJeff Bonwick ddt_create(spa); 779b24ab676SJeff Bonwick 780b24ab676SJeff Bonwick error = zap_lookup(spa->spa_meta_objset, DMU_POOL_DIRECTORY_OBJECT, 781b24ab676SJeff Bonwick DMU_POOL_DDT_STATS, sizeof (uint64_t), 1, 782b24ab676SJeff Bonwick &spa->spa_ddt_stat_object); 783b24ab676SJeff Bonwick 784b24ab676SJeff Bonwick if (error) 785b24ab676SJeff Bonwick return (error == ENOENT ? 0 : error); 786b24ab676SJeff Bonwick 787b24ab676SJeff Bonwick for (enum zio_checksum c = 0; c < ZIO_CHECKSUM_FUNCTIONS; c++) { 78830f608a4SGeorge Wilson ddt_t *ddt = spa->spa_ddt[c]; 789b24ab676SJeff Bonwick for (enum ddt_type type = 0; type < DDT_TYPES; type++) { 790b24ab676SJeff Bonwick for (enum ddt_class class = 0; class < DDT_CLASSES; 791b24ab676SJeff Bonwick class++) { 792b24ab676SJeff Bonwick error = ddt_object_load(ddt, type, class); 793b24ab676SJeff Bonwick if (error != 0 && error != ENOENT) 794b24ab676SJeff Bonwick return (error); 795b24ab676SJeff Bonwick } 796b24ab676SJeff Bonwick } 79730f608a4SGeorge Wilson 79830f608a4SGeorge Wilson /* 79930f608a4SGeorge Wilson * Seed the cached histograms. 80030f608a4SGeorge Wilson */ 80130f608a4SGeorge Wilson bcopy(ddt->ddt_histogram, &ddt->ddt_histogram_cache, 80230f608a4SGeorge Wilson sizeof (ddt->ddt_histogram)); 803b24ab676SJeff Bonwick } 804b24ab676SJeff Bonwick 805b24ab676SJeff Bonwick return (0); 806b24ab676SJeff Bonwick } 807b24ab676SJeff Bonwick 808b24ab676SJeff Bonwick void 809b24ab676SJeff Bonwick ddt_unload(spa_t *spa) 810b24ab676SJeff Bonwick { 811b24ab676SJeff Bonwick for (enum zio_checksum c = 0; c < ZIO_CHECKSUM_FUNCTIONS; c++) { 812b24ab676SJeff Bonwick if (spa->spa_ddt[c]) { 813b24ab676SJeff Bonwick ddt_table_free(spa->spa_ddt[c]); 814b24ab676SJeff Bonwick spa->spa_ddt[c] = NULL; 815b24ab676SJeff Bonwick } 816b24ab676SJeff Bonwick } 817b24ab676SJeff Bonwick } 818b24ab676SJeff Bonwick 819bbfd46c4SJeff Bonwick boolean_t 820bbfd46c4SJeff Bonwick ddt_class_contains(spa_t *spa, enum ddt_class max_class, const blkptr_t *bp) 821bbfd46c4SJeff Bonwick { 822bbfd46c4SJeff Bonwick ddt_t *ddt; 823bbfd46c4SJeff Bonwick ddt_entry_t dde; 824bbfd46c4SJeff Bonwick 825bbfd46c4SJeff Bonwick if (!BP_GET_DEDUP(bp)) 826bbfd46c4SJeff Bonwick return (B_FALSE); 827bbfd46c4SJeff Bonwick 828bbfd46c4SJeff Bonwick if (max_class == DDT_CLASS_UNIQUE) 829bbfd46c4SJeff Bonwick return (B_TRUE); 830bbfd46c4SJeff Bonwick 831bbfd46c4SJeff Bonwick ddt = spa->spa_ddt[BP_GET_CHECKSUM(bp)]; 832bbfd46c4SJeff Bonwick 833bbfd46c4SJeff Bonwick ddt_key_fill(&dde.dde_key, bp); 834bbfd46c4SJeff Bonwick 835bbfd46c4SJeff Bonwick for (enum ddt_type type = 0; type < DDT_TYPES; type++) 836bbfd46c4SJeff Bonwick for (enum ddt_class class = 0; class <= max_class; class++) 837bbfd46c4SJeff Bonwick if (ddt_object_lookup(ddt, type, class, &dde) == 0) 838bbfd46c4SJeff Bonwick return (B_TRUE); 839bbfd46c4SJeff Bonwick 840bbfd46c4SJeff Bonwick return (B_FALSE); 841bbfd46c4SJeff Bonwick } 842bbfd46c4SJeff Bonwick 843b24ab676SJeff Bonwick ddt_entry_t * 844b24ab676SJeff Bonwick ddt_repair_start(ddt_t *ddt, const blkptr_t *bp) 845b24ab676SJeff Bonwick { 846b24ab676SJeff Bonwick ddt_key_t ddk; 847b24ab676SJeff Bonwick ddt_entry_t *dde; 848b24ab676SJeff Bonwick 849b24ab676SJeff Bonwick ddt_key_fill(&ddk, bp); 850b24ab676SJeff Bonwick 851b24ab676SJeff Bonwick dde = ddt_alloc(&ddk); 852b24ab676SJeff Bonwick 853b24ab676SJeff Bonwick for (enum ddt_type type = 0; type < DDT_TYPES; type++) { 854b24ab676SJeff Bonwick for (enum ddt_class class = 0; class < DDT_CLASSES; class++) { 855b24ab676SJeff Bonwick /* 856b24ab676SJeff Bonwick * We can only do repair if there are multiple copies 857b24ab676SJeff Bonwick * of the block. For anything in the UNIQUE class, 858b24ab676SJeff Bonwick * there's definitely only one copy, so don't even try. 859b24ab676SJeff Bonwick */ 860b24ab676SJeff Bonwick if (class != DDT_CLASS_UNIQUE && 861b24ab676SJeff Bonwick ddt_object_lookup(ddt, type, class, dde) == 0) 862b24ab676SJeff Bonwick return (dde); 863b24ab676SJeff Bonwick } 864b24ab676SJeff Bonwick } 865b24ab676SJeff Bonwick 866b24ab676SJeff Bonwick bzero(dde->dde_phys, sizeof (dde->dde_phys)); 867b24ab676SJeff Bonwick 868b24ab676SJeff Bonwick return (dde); 869b24ab676SJeff Bonwick } 870b24ab676SJeff Bonwick 871b24ab676SJeff Bonwick void 872b24ab676SJeff Bonwick ddt_repair_done(ddt_t *ddt, ddt_entry_t *dde) 873b24ab676SJeff Bonwick { 874b24ab676SJeff Bonwick avl_index_t where; 875b24ab676SJeff Bonwick 876b24ab676SJeff Bonwick ddt_enter(ddt); 877b24ab676SJeff Bonwick 878b24ab676SJeff Bonwick if (dde->dde_repair_data != NULL && spa_writeable(ddt->ddt_spa) && 879b24ab676SJeff Bonwick avl_find(&ddt->ddt_repair_tree, dde, &where) == NULL) 880b24ab676SJeff Bonwick avl_insert(&ddt->ddt_repair_tree, dde, where); 881b24ab676SJeff Bonwick else 882b24ab676SJeff Bonwick ddt_free(dde); 883b24ab676SJeff Bonwick 884b24ab676SJeff Bonwick ddt_exit(ddt); 885b24ab676SJeff Bonwick } 886b24ab676SJeff Bonwick 887b24ab676SJeff Bonwick static void 888b24ab676SJeff Bonwick ddt_repair_entry_done(zio_t *zio) 889b24ab676SJeff Bonwick { 890b24ab676SJeff Bonwick ddt_entry_t *rdde = zio->io_private; 891b24ab676SJeff Bonwick 892b24ab676SJeff Bonwick ddt_free(rdde); 893b24ab676SJeff Bonwick } 894b24ab676SJeff Bonwick 895b24ab676SJeff Bonwick static void 896b24ab676SJeff Bonwick ddt_repair_entry(ddt_t *ddt, ddt_entry_t *dde, ddt_entry_t *rdde, zio_t *rio) 897b24ab676SJeff Bonwick { 898b24ab676SJeff Bonwick ddt_phys_t *ddp = dde->dde_phys; 899b24ab676SJeff Bonwick ddt_phys_t *rddp = rdde->dde_phys; 900b24ab676SJeff Bonwick ddt_key_t *ddk = &dde->dde_key; 901b24ab676SJeff Bonwick ddt_key_t *rddk = &rdde->dde_key; 902b24ab676SJeff Bonwick zio_t *zio; 903b24ab676SJeff Bonwick blkptr_t blk; 904b24ab676SJeff Bonwick 905b24ab676SJeff Bonwick zio = zio_null(rio, rio->io_spa, NULL, 906b24ab676SJeff Bonwick ddt_repair_entry_done, rdde, rio->io_flags); 907b24ab676SJeff Bonwick 908b24ab676SJeff Bonwick for (int p = 0; p < DDT_PHYS_TYPES; p++, ddp++, rddp++) { 909b24ab676SJeff Bonwick if (ddp->ddp_phys_birth == 0 || 910b24ab676SJeff Bonwick ddp->ddp_phys_birth != rddp->ddp_phys_birth || 911b24ab676SJeff Bonwick bcmp(ddp->ddp_dva, rddp->ddp_dva, sizeof (ddp->ddp_dva))) 912b24ab676SJeff Bonwick continue; 913bbfd46c4SJeff Bonwick ddt_bp_create(ddt->ddt_checksum, ddk, ddp, &blk); 914b24ab676SJeff Bonwick zio_nowait(zio_rewrite(zio, zio->io_spa, 0, &blk, 915b24ab676SJeff Bonwick rdde->dde_repair_data, DDK_GET_PSIZE(rddk), NULL, NULL, 916b24ab676SJeff Bonwick ZIO_PRIORITY_SYNC_WRITE, ZIO_DDT_CHILD_FLAGS(zio), NULL)); 917b24ab676SJeff Bonwick } 918b24ab676SJeff Bonwick 919b24ab676SJeff Bonwick zio_nowait(zio); 920b24ab676SJeff Bonwick } 921b24ab676SJeff Bonwick 922b24ab676SJeff Bonwick static void 923b24ab676SJeff Bonwick ddt_repair_table(ddt_t *ddt, zio_t *rio) 924b24ab676SJeff Bonwick { 925b24ab676SJeff Bonwick spa_t *spa = ddt->ddt_spa; 926b24ab676SJeff Bonwick ddt_entry_t *dde, *rdde_next, *rdde; 927b24ab676SJeff Bonwick avl_tree_t *t = &ddt->ddt_repair_tree; 928b24ab676SJeff Bonwick blkptr_t blk; 929b24ab676SJeff Bonwick 930b24ab676SJeff Bonwick if (spa_sync_pass(spa) > 1) 931b24ab676SJeff Bonwick return; 932b24ab676SJeff Bonwick 933b24ab676SJeff Bonwick ddt_enter(ddt); 934b24ab676SJeff Bonwick for (rdde = avl_first(t); rdde != NULL; rdde = rdde_next) { 935b24ab676SJeff Bonwick rdde_next = AVL_NEXT(t, rdde); 936b24ab676SJeff Bonwick avl_remove(&ddt->ddt_repair_tree, rdde); 937b24ab676SJeff Bonwick ddt_exit(ddt); 938bbfd46c4SJeff Bonwick ddt_bp_create(ddt->ddt_checksum, &rdde->dde_key, NULL, &blk); 939b24ab676SJeff Bonwick dde = ddt_repair_start(ddt, &blk); 940b24ab676SJeff Bonwick ddt_repair_entry(ddt, dde, rdde, rio); 941b24ab676SJeff Bonwick ddt_repair_done(ddt, dde); 942b24ab676SJeff Bonwick ddt_enter(ddt); 943b24ab676SJeff Bonwick } 944b24ab676SJeff Bonwick ddt_exit(ddt); 945b24ab676SJeff Bonwick } 946b24ab676SJeff Bonwick 947b24ab676SJeff Bonwick static void 948b24ab676SJeff Bonwick ddt_sync_entry(ddt_t *ddt, ddt_entry_t *dde, dmu_tx_t *tx, uint64_t txg) 949b24ab676SJeff Bonwick { 950bbfd46c4SJeff Bonwick dsl_pool_t *dp = ddt->ddt_spa->spa_dsl_pool; 951b24ab676SJeff Bonwick ddt_phys_t *ddp = dde->dde_phys; 952b24ab676SJeff Bonwick ddt_key_t *ddk = &dde->dde_key; 953b24ab676SJeff Bonwick enum ddt_type otype = dde->dde_type; 954b24ab676SJeff Bonwick enum ddt_type ntype = DDT_TYPE_CURRENT; 955b24ab676SJeff Bonwick enum ddt_class oclass = dde->dde_class; 956b24ab676SJeff Bonwick enum ddt_class nclass; 957b24ab676SJeff Bonwick uint64_t total_refcnt = 0; 958b24ab676SJeff Bonwick 959b24ab676SJeff Bonwick ASSERT(dde->dde_loaded); 960b24ab676SJeff Bonwick ASSERT(!dde->dde_loading); 961b24ab676SJeff Bonwick 962b24ab676SJeff Bonwick for (int p = 0; p < DDT_PHYS_TYPES; p++, ddp++) { 963b24ab676SJeff Bonwick ASSERT(dde->dde_lead_zio[p] == NULL); 964b24ab676SJeff Bonwick ASSERT((int64_t)ddp->ddp_refcnt >= 0); 965b24ab676SJeff Bonwick if (ddp->ddp_phys_birth == 0) { 966b24ab676SJeff Bonwick ASSERT(ddp->ddp_refcnt == 0); 967b24ab676SJeff Bonwick continue; 968b24ab676SJeff Bonwick } 969b24ab676SJeff Bonwick if (p == DDT_PHYS_DITTO) { 970b24ab676SJeff Bonwick if (ddt_ditto_copies_needed(ddt, dde, NULL) == 0) 971b24ab676SJeff Bonwick ddt_phys_free(ddt, ddk, ddp, txg); 972b24ab676SJeff Bonwick continue; 973b24ab676SJeff Bonwick } 974b24ab676SJeff Bonwick if (ddp->ddp_refcnt == 0) 975b24ab676SJeff Bonwick ddt_phys_free(ddt, ddk, ddp, txg); 976b24ab676SJeff Bonwick total_refcnt += ddp->ddp_refcnt; 977b24ab676SJeff Bonwick } 978b24ab676SJeff Bonwick 979b24ab676SJeff Bonwick if (dde->dde_phys[DDT_PHYS_DITTO].ddp_phys_birth != 0) 980b24ab676SJeff Bonwick nclass = DDT_CLASS_DITTO; 981b24ab676SJeff Bonwick else if (total_refcnt > 1) 982b24ab676SJeff Bonwick nclass = DDT_CLASS_DUPLICATE; 983b24ab676SJeff Bonwick else 984b24ab676SJeff Bonwick nclass = DDT_CLASS_UNIQUE; 985b24ab676SJeff Bonwick 986b24ab676SJeff Bonwick if (otype != DDT_TYPES && 987b24ab676SJeff Bonwick (otype != ntype || oclass != nclass || total_refcnt == 0)) { 988b24ab676SJeff Bonwick VERIFY(ddt_object_remove(ddt, otype, oclass, dde, tx) == 0); 989b24ab676SJeff Bonwick ASSERT(ddt_object_lookup(ddt, otype, oclass, dde) == ENOENT); 990b24ab676SJeff Bonwick } 991b24ab676SJeff Bonwick 992b24ab676SJeff Bonwick if (total_refcnt != 0) { 993b24ab676SJeff Bonwick dde->dde_type = ntype; 994b24ab676SJeff Bonwick dde->dde_class = nclass; 995b24ab676SJeff Bonwick ddt_stat_update(ddt, dde, 0); 996b24ab676SJeff Bonwick if (!ddt_object_exists(ddt, ntype, nclass)) 997b24ab676SJeff Bonwick ddt_object_create(ddt, ntype, nclass, tx); 998b24ab676SJeff Bonwick VERIFY(ddt_object_update(ddt, ntype, nclass, dde, tx) == 0); 999bbfd46c4SJeff Bonwick 1000*3f9d6ad7SLin Ling /* 1001*3f9d6ad7SLin Ling * If the class changes, the order that we scan this bp 1002*3f9d6ad7SLin Ling * changes. If it decreases, we could miss it, so 1003*3f9d6ad7SLin Ling * scan it right now. (This covers both class changing 1004*3f9d6ad7SLin Ling * while we are doing ddt_walk(), and when we are 1005*3f9d6ad7SLin Ling * traversing.) 1006*3f9d6ad7SLin Ling */ 1007*3f9d6ad7SLin Ling if (nclass < oclass) { 1008*3f9d6ad7SLin Ling dsl_scan_ddt_entry(dp->dp_scan, 1009*3f9d6ad7SLin Ling ddt->ddt_checksum, dde, tx); 1010*3f9d6ad7SLin Ling } 1011b24ab676SJeff Bonwick } 1012b24ab676SJeff Bonwick } 1013b24ab676SJeff Bonwick 1014b24ab676SJeff Bonwick static void 1015b24ab676SJeff Bonwick ddt_sync_table(ddt_t *ddt, dmu_tx_t *tx, uint64_t txg) 1016b24ab676SJeff Bonwick { 1017b24ab676SJeff Bonwick spa_t *spa = ddt->ddt_spa; 1018b24ab676SJeff Bonwick ddt_entry_t *dde; 1019b24ab676SJeff Bonwick void *cookie = NULL; 1020b24ab676SJeff Bonwick 1021b24ab676SJeff Bonwick if (avl_numnodes(&ddt->ddt_tree) == 0) 1022b24ab676SJeff Bonwick return; 1023b24ab676SJeff Bonwick 1024b24ab676SJeff Bonwick ASSERT(spa->spa_uberblock.ub_version >= SPA_VERSION_DEDUP); 1025b24ab676SJeff Bonwick 1026b24ab676SJeff Bonwick if (spa->spa_ddt_stat_object == 0) { 1027b24ab676SJeff Bonwick spa->spa_ddt_stat_object = zap_create(ddt->ddt_os, 1028b24ab676SJeff Bonwick DMU_OT_DDT_STATS, DMU_OT_NONE, 0, tx); 1029b24ab676SJeff Bonwick VERIFY(zap_add(ddt->ddt_os, DMU_POOL_DIRECTORY_OBJECT, 1030b24ab676SJeff Bonwick DMU_POOL_DDT_STATS, sizeof (uint64_t), 1, 1031b24ab676SJeff Bonwick &spa->spa_ddt_stat_object, tx) == 0); 1032b24ab676SJeff Bonwick } 1033b24ab676SJeff Bonwick 1034b24ab676SJeff Bonwick while ((dde = avl_destroy_nodes(&ddt->ddt_tree, &cookie)) != NULL) { 1035b24ab676SJeff Bonwick ddt_sync_entry(ddt, dde, tx, txg); 1036b24ab676SJeff Bonwick ddt_free(dde); 1037b24ab676SJeff Bonwick } 1038b24ab676SJeff Bonwick 1039b24ab676SJeff Bonwick for (enum ddt_type type = 0; type < DDT_TYPES; type++) { 1040b24ab676SJeff Bonwick for (enum ddt_class class = 0; class < DDT_CLASSES; class++) { 1041b24ab676SJeff Bonwick if (!ddt_object_exists(ddt, type, class)) 1042b24ab676SJeff Bonwick continue; 1043b24ab676SJeff Bonwick ddt_object_sync(ddt, type, class, tx); 1044b24ab676SJeff Bonwick if (ddt_object_count(ddt, type, class) == 0) 1045b24ab676SJeff Bonwick ddt_object_destroy(ddt, type, class, tx); 1046b24ab676SJeff Bonwick } 1047b24ab676SJeff Bonwick } 104830f608a4SGeorge Wilson 104930f608a4SGeorge Wilson bcopy(ddt->ddt_histogram, &ddt->ddt_histogram_cache, 105030f608a4SGeorge Wilson sizeof (ddt->ddt_histogram)); 1051b24ab676SJeff Bonwick } 1052b24ab676SJeff Bonwick 1053b24ab676SJeff Bonwick void 1054b24ab676SJeff Bonwick ddt_sync(spa_t *spa, uint64_t txg) 1055b24ab676SJeff Bonwick { 1056b24ab676SJeff Bonwick dmu_tx_t *tx; 1057b24ab676SJeff Bonwick zio_t *rio = zio_root(spa, NULL, NULL, 1058b24ab676SJeff Bonwick ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE); 1059b24ab676SJeff Bonwick 1060b24ab676SJeff Bonwick ASSERT(spa_syncing_txg(spa) == txg); 1061b24ab676SJeff Bonwick 1062b24ab676SJeff Bonwick tx = dmu_tx_create_assigned(spa->spa_dsl_pool, txg); 1063b24ab676SJeff Bonwick 1064b24ab676SJeff Bonwick for (enum zio_checksum c = 0; c < ZIO_CHECKSUM_FUNCTIONS; c++) { 1065b24ab676SJeff Bonwick ddt_t *ddt = spa->spa_ddt[c]; 1066b24ab676SJeff Bonwick if (ddt == NULL) 1067b24ab676SJeff Bonwick continue; 1068b24ab676SJeff Bonwick ddt_sync_table(ddt, tx, txg); 1069b24ab676SJeff Bonwick ddt_repair_table(ddt, rio); 1070b24ab676SJeff Bonwick } 1071b24ab676SJeff Bonwick 1072b24ab676SJeff Bonwick (void) zio_wait(rio); 1073b24ab676SJeff Bonwick 1074b24ab676SJeff Bonwick dmu_tx_commit(tx); 1075b24ab676SJeff Bonwick } 1076bbfd46c4SJeff Bonwick 1077bbfd46c4SJeff Bonwick int 1078bbfd46c4SJeff Bonwick ddt_walk(spa_t *spa, ddt_bookmark_t *ddb, ddt_entry_t *dde) 1079bbfd46c4SJeff Bonwick { 1080bbfd46c4SJeff Bonwick do { 1081bbfd46c4SJeff Bonwick do { 1082bbfd46c4SJeff Bonwick do { 1083bbfd46c4SJeff Bonwick ddt_t *ddt = spa->spa_ddt[ddb->ddb_checksum]; 1084bbfd46c4SJeff Bonwick int error = ENOENT; 1085bbfd46c4SJeff Bonwick if (ddt_object_exists(ddt, ddb->ddb_type, 1086bbfd46c4SJeff Bonwick ddb->ddb_class)) { 1087bbfd46c4SJeff Bonwick error = ddt_object_walk(ddt, 1088bbfd46c4SJeff Bonwick ddb->ddb_type, ddb->ddb_class, 1089bbfd46c4SJeff Bonwick &ddb->ddb_cursor, dde); 1090bbfd46c4SJeff Bonwick } 1091*3f9d6ad7SLin Ling dde->dde_type = ddb->ddb_type; 1092*3f9d6ad7SLin Ling dde->dde_class = ddb->ddb_class; 1093bbfd46c4SJeff Bonwick if (error == 0) 1094bbfd46c4SJeff Bonwick return (0); 1095bbfd46c4SJeff Bonwick if (error != ENOENT) 1096bbfd46c4SJeff Bonwick return (error); 1097bbfd46c4SJeff Bonwick ddb->ddb_cursor = 0; 1098bbfd46c4SJeff Bonwick } while (++ddb->ddb_checksum < ZIO_CHECKSUM_FUNCTIONS); 1099bbfd46c4SJeff Bonwick ddb->ddb_checksum = 0; 1100bbfd46c4SJeff Bonwick } while (++ddb->ddb_type < DDT_TYPES); 1101bbfd46c4SJeff Bonwick ddb->ddb_type = 0; 1102bbfd46c4SJeff Bonwick } while (++ddb->ddb_class < DDT_CLASSES); 1103bbfd46c4SJeff Bonwick 1104bbfd46c4SJeff Bonwick return (ENOENT); 1105bbfd46c4SJeff Bonwick } 1106