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 /* 23b24ab676SJeff Bonwick * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 24b24ab676SJeff Bonwick * Use is subject to license terms. 25b24ab676SJeff Bonwick */ 26b24ab676SJeff Bonwick 27b24ab676SJeff Bonwick #include <sys/zfs_context.h> 28b24ab676SJeff Bonwick #include <sys/spa.h> 29b24ab676SJeff Bonwick #include <sys/spa_impl.h> 30b24ab676SJeff Bonwick #include <sys/zio.h> 31b24ab676SJeff Bonwick #include <sys/ddt.h> 32b24ab676SJeff Bonwick #include <sys/zap.h> 33b24ab676SJeff Bonwick #include <sys/dmu_tx.h> 34b24ab676SJeff Bonwick #include <sys/arc.h> 35bbfd46c4SJeff Bonwick #include <sys/dsl_pool.h> 36b24ab676SJeff Bonwick #include <sys/zio_checksum.h> 37b24ab676SJeff Bonwick #include <sys/zio_compress.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); 90b24ab676SJeff Bonwick 91b24ab676SJeff Bonwick *objectp = 0; 92b24ab676SJeff Bonwick } 93b24ab676SJeff Bonwick 94b24ab676SJeff Bonwick static int 95b24ab676SJeff Bonwick ddt_object_load(ddt_t *ddt, enum ddt_type type, enum ddt_class class) 96b24ab676SJeff Bonwick { 97b24ab676SJeff Bonwick char name[DDT_NAMELEN]; 98b24ab676SJeff Bonwick int error; 99b24ab676SJeff Bonwick 100b24ab676SJeff Bonwick ddt_object_name(ddt, type, class, name); 101b24ab676SJeff Bonwick 102b24ab676SJeff Bonwick error = zap_lookup(ddt->ddt_os, DMU_POOL_DIRECTORY_OBJECT, name, 103b24ab676SJeff Bonwick sizeof (uint64_t), 1, &ddt->ddt_object[type][class]); 104b24ab676SJeff Bonwick 105b24ab676SJeff Bonwick if (error) 106b24ab676SJeff Bonwick return (error); 107b24ab676SJeff Bonwick 108b24ab676SJeff Bonwick error = zap_lookup(ddt->ddt_os, ddt->ddt_spa->spa_ddt_stat_object, name, 109b24ab676SJeff Bonwick sizeof (uint64_t), sizeof (ddt_histogram_t) / sizeof (uint64_t), 110b24ab676SJeff Bonwick &ddt->ddt_histogram[type][class]); 111b24ab676SJeff Bonwick 112b24ab676SJeff Bonwick ASSERT(error == 0); 113b24ab676SJeff Bonwick return (error); 114b24ab676SJeff Bonwick } 115b24ab676SJeff Bonwick 116b24ab676SJeff Bonwick static void 117b24ab676SJeff Bonwick ddt_object_sync(ddt_t *ddt, enum ddt_type type, enum ddt_class class, 118b24ab676SJeff Bonwick dmu_tx_t *tx) 119b24ab676SJeff Bonwick { 120b24ab676SJeff Bonwick char name[DDT_NAMELEN]; 121b24ab676SJeff Bonwick 122b24ab676SJeff Bonwick ddt_object_name(ddt, type, class, name); 123b24ab676SJeff Bonwick 124b24ab676SJeff Bonwick VERIFY(zap_update(ddt->ddt_os, ddt->ddt_spa->spa_ddt_stat_object, name, 125b24ab676SJeff Bonwick sizeof (uint64_t), sizeof (ddt_histogram_t) / sizeof (uint64_t), 126b24ab676SJeff Bonwick &ddt->ddt_histogram[type][class], tx) == 0); 127b24ab676SJeff Bonwick } 128b24ab676SJeff Bonwick 129b24ab676SJeff Bonwick static int 130b24ab676SJeff Bonwick ddt_object_lookup(ddt_t *ddt, enum ddt_type type, enum ddt_class class, 131b24ab676SJeff Bonwick ddt_entry_t *dde) 132b24ab676SJeff Bonwick { 133b24ab676SJeff Bonwick if (!ddt_object_exists(ddt, type, class)) 134b24ab676SJeff Bonwick return (ENOENT); 135b24ab676SJeff Bonwick 136b24ab676SJeff Bonwick return (ddt_ops[type]->ddt_op_lookup(ddt->ddt_os, 137b24ab676SJeff Bonwick ddt->ddt_object[type][class], dde)); 138b24ab676SJeff Bonwick } 139b24ab676SJeff Bonwick 140b24ab676SJeff Bonwick static int 141b24ab676SJeff Bonwick ddt_object_update(ddt_t *ddt, enum ddt_type type, enum ddt_class class, 142b24ab676SJeff Bonwick ddt_entry_t *dde, dmu_tx_t *tx) 143b24ab676SJeff Bonwick { 144b24ab676SJeff Bonwick ASSERT(ddt_object_exists(ddt, type, class)); 145b24ab676SJeff Bonwick 146b24ab676SJeff Bonwick return (ddt_ops[type]->ddt_op_update(ddt->ddt_os, 147b24ab676SJeff Bonwick ddt->ddt_object[type][class], dde, tx)); 148b24ab676SJeff Bonwick } 149b24ab676SJeff Bonwick 150b24ab676SJeff Bonwick static int 151b24ab676SJeff Bonwick ddt_object_remove(ddt_t *ddt, enum ddt_type type, enum ddt_class class, 152b24ab676SJeff Bonwick ddt_entry_t *dde, dmu_tx_t *tx) 153b24ab676SJeff Bonwick { 154b24ab676SJeff Bonwick ASSERT(ddt_object_exists(ddt, type, class)); 155b24ab676SJeff Bonwick 156b24ab676SJeff Bonwick return (ddt_ops[type]->ddt_op_remove(ddt->ddt_os, 157b24ab676SJeff Bonwick ddt->ddt_object[type][class], dde, tx)); 158b24ab676SJeff Bonwick } 159b24ab676SJeff Bonwick 160b24ab676SJeff Bonwick int 161b24ab676SJeff Bonwick ddt_object_walk(ddt_t *ddt, enum ddt_type type, enum ddt_class class, 162bbfd46c4SJeff Bonwick uint64_t *walk, ddt_entry_t *dde) 163b24ab676SJeff Bonwick { 164b24ab676SJeff Bonwick ASSERT(ddt_object_exists(ddt, type, class)); 165b24ab676SJeff Bonwick 166b24ab676SJeff Bonwick return (ddt_ops[type]->ddt_op_walk(ddt->ddt_os, 167b24ab676SJeff Bonwick ddt->ddt_object[type][class], dde, walk)); 168b24ab676SJeff Bonwick } 169b24ab676SJeff Bonwick 170b24ab676SJeff Bonwick uint64_t 171b24ab676SJeff Bonwick ddt_object_count(ddt_t *ddt, enum ddt_type type, enum ddt_class class) 172b24ab676SJeff Bonwick { 173b24ab676SJeff Bonwick ASSERT(ddt_object_exists(ddt, type, class)); 174b24ab676SJeff Bonwick 175b24ab676SJeff Bonwick return (ddt_ops[type]->ddt_op_count(ddt->ddt_os, 176b24ab676SJeff Bonwick ddt->ddt_object[type][class])); 177b24ab676SJeff Bonwick } 178b24ab676SJeff Bonwick 179b24ab676SJeff Bonwick int 180b24ab676SJeff Bonwick ddt_object_info(ddt_t *ddt, enum ddt_type type, enum ddt_class class, 181b24ab676SJeff Bonwick dmu_object_info_t *doi) 182b24ab676SJeff Bonwick { 183b24ab676SJeff Bonwick if (!ddt_object_exists(ddt, type, class)) 184b24ab676SJeff Bonwick return (ENOENT); 185b24ab676SJeff Bonwick 186b24ab676SJeff Bonwick return (dmu_object_info(ddt->ddt_os, ddt->ddt_object[type][class], 187b24ab676SJeff Bonwick doi)); 188b24ab676SJeff Bonwick } 189b24ab676SJeff Bonwick 190b24ab676SJeff Bonwick boolean_t 191b24ab676SJeff Bonwick ddt_object_exists(ddt_t *ddt, enum ddt_type type, enum ddt_class class) 192b24ab676SJeff Bonwick { 193b24ab676SJeff Bonwick return (!!ddt->ddt_object[type][class]); 194b24ab676SJeff Bonwick } 195b24ab676SJeff Bonwick 196b24ab676SJeff Bonwick void 197b24ab676SJeff Bonwick ddt_object_name(ddt_t *ddt, enum ddt_type type, enum ddt_class class, 198b24ab676SJeff Bonwick char *name) 199b24ab676SJeff Bonwick { 200b24ab676SJeff Bonwick (void) sprintf(name, DMU_POOL_DDT, 201b24ab676SJeff Bonwick zio_checksum_table[ddt->ddt_checksum].ci_name, 202b24ab676SJeff Bonwick ddt_ops[type]->ddt_op_name, ddt_class_name[class]); 203b24ab676SJeff Bonwick } 204b24ab676SJeff Bonwick 205b24ab676SJeff Bonwick void 206b24ab676SJeff Bonwick ddt_bp_fill(const ddt_phys_t *ddp, blkptr_t *bp, uint64_t txg) 207b24ab676SJeff Bonwick { 208b24ab676SJeff Bonwick ASSERT(txg != 0); 209b24ab676SJeff Bonwick 210b24ab676SJeff Bonwick for (int d = 0; d < SPA_DVAS_PER_BP; d++) 211b24ab676SJeff Bonwick bp->blk_dva[d] = ddp->ddp_dva[d]; 212b24ab676SJeff Bonwick BP_SET_BIRTH(bp, txg, ddp->ddp_phys_birth); 213b24ab676SJeff Bonwick } 214b24ab676SJeff Bonwick 215b24ab676SJeff Bonwick void 216bbfd46c4SJeff Bonwick ddt_bp_create(enum zio_checksum checksum, 217bbfd46c4SJeff Bonwick const ddt_key_t *ddk, const ddt_phys_t *ddp, blkptr_t *bp) 218b24ab676SJeff Bonwick { 219b24ab676SJeff Bonwick BP_ZERO(bp); 220b24ab676SJeff Bonwick 221b24ab676SJeff Bonwick if (ddp != NULL) 222b24ab676SJeff Bonwick ddt_bp_fill(ddp, bp, ddp->ddp_phys_birth); 223b24ab676SJeff Bonwick 224b24ab676SJeff Bonwick bp->blk_cksum = ddk->ddk_cksum; 225b24ab676SJeff Bonwick 226b24ab676SJeff Bonwick BP_SET_LSIZE(bp, DDK_GET_LSIZE(ddk)); 227b24ab676SJeff Bonwick BP_SET_PSIZE(bp, DDK_GET_PSIZE(ddk)); 228b24ab676SJeff Bonwick BP_SET_COMPRESS(bp, DDK_GET_COMPRESS(ddk)); 229bbfd46c4SJeff Bonwick BP_SET_CHECKSUM(bp, checksum); 230b24ab676SJeff Bonwick BP_SET_TYPE(bp, DMU_OT_NONE); 231b24ab676SJeff Bonwick BP_SET_LEVEL(bp, 0); 232b24ab676SJeff Bonwick BP_SET_DEDUP(bp, 0); 233b24ab676SJeff Bonwick BP_SET_BYTEORDER(bp, ZFS_HOST_BYTEORDER); 234b24ab676SJeff Bonwick } 235b24ab676SJeff Bonwick 236b24ab676SJeff Bonwick void 237b24ab676SJeff Bonwick ddt_key_fill(ddt_key_t *ddk, const blkptr_t *bp) 238b24ab676SJeff Bonwick { 239b24ab676SJeff Bonwick ddk->ddk_cksum = bp->blk_cksum; 240b24ab676SJeff Bonwick ddk->ddk_prop = 0; 241b24ab676SJeff Bonwick 242b24ab676SJeff Bonwick DDK_SET_LSIZE(ddk, BP_GET_LSIZE(bp)); 243b24ab676SJeff Bonwick DDK_SET_PSIZE(ddk, BP_GET_PSIZE(bp)); 244b24ab676SJeff Bonwick DDK_SET_COMPRESS(ddk, BP_GET_COMPRESS(bp)); 245b24ab676SJeff Bonwick } 246b24ab676SJeff Bonwick 247b24ab676SJeff Bonwick void 248b24ab676SJeff Bonwick ddt_phys_fill(ddt_phys_t *ddp, const blkptr_t *bp) 249b24ab676SJeff Bonwick { 250b24ab676SJeff Bonwick ASSERT(ddp->ddp_phys_birth == 0); 251b24ab676SJeff Bonwick 252b24ab676SJeff Bonwick for (int d = 0; d < SPA_DVAS_PER_BP; d++) 253b24ab676SJeff Bonwick ddp->ddp_dva[d] = bp->blk_dva[d]; 254b24ab676SJeff Bonwick ddp->ddp_phys_birth = BP_PHYSICAL_BIRTH(bp); 255b24ab676SJeff Bonwick } 256b24ab676SJeff Bonwick 257b24ab676SJeff Bonwick void 258b24ab676SJeff Bonwick ddt_phys_clear(ddt_phys_t *ddp) 259b24ab676SJeff Bonwick { 260b24ab676SJeff Bonwick bzero(ddp, sizeof (*ddp)); 261b24ab676SJeff Bonwick } 262b24ab676SJeff Bonwick 263b24ab676SJeff Bonwick void 264b24ab676SJeff Bonwick ddt_phys_addref(ddt_phys_t *ddp) 265b24ab676SJeff Bonwick { 266b24ab676SJeff Bonwick ddp->ddp_refcnt++; 267b24ab676SJeff Bonwick } 268b24ab676SJeff Bonwick 269b24ab676SJeff Bonwick void 270b24ab676SJeff Bonwick ddt_phys_decref(ddt_phys_t *ddp) 271b24ab676SJeff Bonwick { 272b24ab676SJeff Bonwick ASSERT((int64_t)ddp->ddp_refcnt > 0); 273b24ab676SJeff Bonwick ddp->ddp_refcnt--; 274b24ab676SJeff Bonwick } 275b24ab676SJeff Bonwick 276b24ab676SJeff Bonwick void 277b24ab676SJeff Bonwick ddt_phys_free(ddt_t *ddt, ddt_key_t *ddk, ddt_phys_t *ddp, uint64_t txg) 278b24ab676SJeff Bonwick { 279b24ab676SJeff Bonwick blkptr_t blk; 280b24ab676SJeff Bonwick 281bbfd46c4SJeff Bonwick ddt_bp_create(ddt->ddt_checksum, ddk, ddp, &blk); 282b24ab676SJeff Bonwick ddt_phys_clear(ddp); 283b24ab676SJeff Bonwick zio_free(ddt->ddt_spa, txg, &blk); 284b24ab676SJeff Bonwick } 285b24ab676SJeff Bonwick 286b24ab676SJeff Bonwick ddt_phys_t * 287b24ab676SJeff Bonwick ddt_phys_select(const ddt_entry_t *dde, const blkptr_t *bp) 288b24ab676SJeff Bonwick { 289b24ab676SJeff Bonwick ddt_phys_t *ddp = (ddt_phys_t *)dde->dde_phys; 290b24ab676SJeff Bonwick 291b24ab676SJeff Bonwick for (int p = 0; p < DDT_PHYS_TYPES; p++, ddp++) { 292b24ab676SJeff Bonwick if (DVA_EQUAL(BP_IDENTITY(bp), &ddp->ddp_dva[0]) && 293b24ab676SJeff Bonwick BP_PHYSICAL_BIRTH(bp) == ddp->ddp_phys_birth) 294b24ab676SJeff Bonwick return (ddp); 295b24ab676SJeff Bonwick } 296b24ab676SJeff Bonwick return (NULL); 297b24ab676SJeff Bonwick } 298b24ab676SJeff Bonwick 299b24ab676SJeff Bonwick uint64_t 300b24ab676SJeff Bonwick ddt_phys_total_refcnt(const ddt_entry_t *dde) 301b24ab676SJeff Bonwick { 302b24ab676SJeff Bonwick uint64_t refcnt = 0; 303b24ab676SJeff Bonwick 304b24ab676SJeff Bonwick for (int p = DDT_PHYS_SINGLE; p <= DDT_PHYS_TRIPLE; p++) 305b24ab676SJeff Bonwick refcnt += dde->dde_phys[p].ddp_refcnt; 306b24ab676SJeff Bonwick 307b24ab676SJeff Bonwick return (refcnt); 308b24ab676SJeff Bonwick } 309b24ab676SJeff Bonwick 310b24ab676SJeff Bonwick static void 311b24ab676SJeff Bonwick ddt_stat_generate(ddt_t *ddt, ddt_entry_t *dde, ddt_stat_t *dds) 312b24ab676SJeff Bonwick { 313b24ab676SJeff Bonwick spa_t *spa = ddt->ddt_spa; 314b24ab676SJeff Bonwick ddt_phys_t *ddp = dde->dde_phys; 315b24ab676SJeff Bonwick ddt_key_t *ddk = &dde->dde_key; 316b24ab676SJeff Bonwick uint64_t lsize = DDK_GET_LSIZE(ddk); 317b24ab676SJeff Bonwick uint64_t psize = DDK_GET_PSIZE(ddk); 318b24ab676SJeff Bonwick 319b24ab676SJeff Bonwick bzero(dds, sizeof (*dds)); 320b24ab676SJeff Bonwick 321b24ab676SJeff Bonwick for (int p = 0; p < DDT_PHYS_TYPES; p++, ddp++) { 322b24ab676SJeff Bonwick uint64_t dsize = 0; 323b24ab676SJeff Bonwick uint64_t refcnt = ddp->ddp_refcnt; 324b24ab676SJeff Bonwick 325b24ab676SJeff Bonwick if (ddp->ddp_phys_birth == 0) 326b24ab676SJeff Bonwick continue; 327b24ab676SJeff Bonwick 328b24ab676SJeff Bonwick for (int d = 0; d < SPA_DVAS_PER_BP; d++) 329b24ab676SJeff Bonwick dsize += dva_get_dsize_sync(spa, &ddp->ddp_dva[d]); 330b24ab676SJeff Bonwick 331b24ab676SJeff Bonwick dds->dds_blocks += 1; 332b24ab676SJeff Bonwick dds->dds_lsize += lsize; 333b24ab676SJeff Bonwick dds->dds_psize += psize; 334b24ab676SJeff Bonwick dds->dds_dsize += dsize; 335b24ab676SJeff Bonwick 336b24ab676SJeff Bonwick dds->dds_ref_blocks += refcnt; 337b24ab676SJeff Bonwick dds->dds_ref_lsize += lsize * refcnt; 338b24ab676SJeff Bonwick dds->dds_ref_psize += psize * refcnt; 339b24ab676SJeff Bonwick dds->dds_ref_dsize += dsize * refcnt; 340b24ab676SJeff Bonwick } 341b24ab676SJeff Bonwick } 342b24ab676SJeff Bonwick 343b24ab676SJeff Bonwick void 344b24ab676SJeff Bonwick ddt_stat_add(ddt_stat_t *dst, const ddt_stat_t *src, uint64_t neg) 345b24ab676SJeff Bonwick { 346b24ab676SJeff Bonwick const uint64_t *s = (const uint64_t *)src; 347b24ab676SJeff Bonwick uint64_t *d = (uint64_t *)dst; 348b24ab676SJeff Bonwick uint64_t *d_end = (uint64_t *)(dst + 1); 349b24ab676SJeff Bonwick 350b24ab676SJeff Bonwick ASSERT(neg == 0 || neg == -1ULL); /* add or subtract */ 351b24ab676SJeff Bonwick 352b24ab676SJeff Bonwick while (d < d_end) 353b24ab676SJeff Bonwick *d++ += (*s++ ^ neg) - neg; 354b24ab676SJeff Bonwick } 355b24ab676SJeff Bonwick 356b24ab676SJeff Bonwick static void 357b24ab676SJeff Bonwick ddt_stat_update(ddt_t *ddt, ddt_entry_t *dde, uint64_t neg) 358b24ab676SJeff Bonwick { 359b24ab676SJeff Bonwick ddt_stat_t dds; 360b24ab676SJeff Bonwick ddt_histogram_t *ddh; 361b24ab676SJeff Bonwick int bucket; 362b24ab676SJeff Bonwick 363b24ab676SJeff Bonwick ddt_stat_generate(ddt, dde, &dds); 364b24ab676SJeff Bonwick 365b24ab676SJeff Bonwick bucket = highbit(dds.dds_ref_blocks) - 1; 366b24ab676SJeff Bonwick ASSERT(bucket >= 0); 367b24ab676SJeff Bonwick 368b24ab676SJeff Bonwick ddh = &ddt->ddt_histogram[dde->dde_type][dde->dde_class]; 369b24ab676SJeff Bonwick 370b24ab676SJeff Bonwick ddt_stat_add(&ddh->ddh_stat[bucket], &dds, neg); 371b24ab676SJeff Bonwick } 372b24ab676SJeff Bonwick 373b24ab676SJeff Bonwick void 374b24ab676SJeff Bonwick ddt_histogram_add(ddt_histogram_t *dst, const ddt_histogram_t *src) 375b24ab676SJeff Bonwick { 376b24ab676SJeff Bonwick for (int h = 0; h < 64; h++) 377b24ab676SJeff Bonwick ddt_stat_add(&dst->ddh_stat[h], &src->ddh_stat[h], 0); 378b24ab676SJeff Bonwick } 379b24ab676SJeff Bonwick 380b24ab676SJeff Bonwick void 381b24ab676SJeff Bonwick ddt_histogram_stat(ddt_stat_t *dds, const ddt_histogram_t *ddh) 382b24ab676SJeff Bonwick { 383b24ab676SJeff Bonwick bzero(dds, sizeof (*dds)); 384b24ab676SJeff Bonwick 385b24ab676SJeff Bonwick for (int h = 0; h < 64; h++) 386b24ab676SJeff Bonwick ddt_stat_add(dds, &ddh->ddh_stat[h], 0); 387b24ab676SJeff Bonwick } 388b24ab676SJeff Bonwick 389b24ab676SJeff Bonwick boolean_t 390b24ab676SJeff Bonwick ddt_histogram_empty(const ddt_histogram_t *ddh) 391b24ab676SJeff Bonwick { 392b24ab676SJeff Bonwick const uint64_t *s = (const uint64_t *)ddh; 393b24ab676SJeff Bonwick const uint64_t *s_end = (const uint64_t *)(ddh + 1); 394b24ab676SJeff Bonwick 395b24ab676SJeff Bonwick while (s < s_end) 396b24ab676SJeff Bonwick if (*s++ != 0) 397b24ab676SJeff Bonwick return (B_FALSE); 398b24ab676SJeff Bonwick 399b24ab676SJeff Bonwick return (B_TRUE); 400b24ab676SJeff Bonwick } 401b24ab676SJeff Bonwick 402*9eb19f4dSGeorge Wilson void 403*9eb19f4dSGeorge Wilson ddt_get_dedup_object_stats(spa_t *spa, ddt_object_t *ddo) 404b24ab676SJeff Bonwick { 405*9eb19f4dSGeorge Wilson dmu_object_info_t doi; 406*9eb19f4dSGeorge Wilson uint64_t count; 407*9eb19f4dSGeorge Wilson int error; 408b24ab676SJeff Bonwick 409b24ab676SJeff Bonwick for (enum zio_checksum c = 0; c < ZIO_CHECKSUM_FUNCTIONS; c++) { 410b24ab676SJeff Bonwick ddt_t *ddt = spa->spa_ddt[c]; 411b24ab676SJeff Bonwick for (enum ddt_type type = 0; type < DDT_TYPES; type++) { 412b24ab676SJeff Bonwick for (enum ddt_class class = 0; class < DDT_CLASSES; 413b24ab676SJeff Bonwick class++) { 414*9eb19f4dSGeorge Wilson error = ddt_object_info(ddt, type, class, &doi); 415*9eb19f4dSGeorge Wilson if (error == ENOENT) 416*9eb19f4dSGeorge Wilson continue; 417*9eb19f4dSGeorge Wilson ASSERT3U(error, ==, 0); 418*9eb19f4dSGeorge Wilson 419*9eb19f4dSGeorge Wilson count = ddt_object_count(ddt, type, class); 420*9eb19f4dSGeorge Wilson ddo->ddo_count += count; 421*9eb19f4dSGeorge Wilson ddo->ddo_dspace += 422*9eb19f4dSGeorge Wilson (doi.doi_physical_blocks_512 << 9) / count; 423*9eb19f4dSGeorge Wilson ddo->ddo_mspace += doi.doi_fill_count * 424*9eb19f4dSGeorge Wilson doi.doi_data_block_size / count; 425*9eb19f4dSGeorge Wilson } 426*9eb19f4dSGeorge Wilson } 427*9eb19f4dSGeorge Wilson } 428*9eb19f4dSGeorge Wilson } 429*9eb19f4dSGeorge Wilson 430*9eb19f4dSGeorge Wilson void 431*9eb19f4dSGeorge Wilson ddt_get_dedup_histogram(spa_t *spa, ddt_histogram_t *ddh) 432*9eb19f4dSGeorge Wilson { 433*9eb19f4dSGeorge Wilson for (enum zio_checksum c = 0; c < ZIO_CHECKSUM_FUNCTIONS; c++) { 434*9eb19f4dSGeorge Wilson ddt_t *ddt = spa->spa_ddt[c]; 435*9eb19f4dSGeorge Wilson for (enum ddt_type type = 0; type < DDT_TYPES; type++) { 436*9eb19f4dSGeorge Wilson for (enum ddt_class class = 0; class < DDT_CLASSES; 437*9eb19f4dSGeorge Wilson class++) { 438*9eb19f4dSGeorge Wilson ddt_histogram_add(ddh, 439b24ab676SJeff Bonwick &ddt->ddt_histogram[type][class]); 440b24ab676SJeff Bonwick } 441b24ab676SJeff Bonwick } 442b24ab676SJeff Bonwick } 443*9eb19f4dSGeorge Wilson } 444*9eb19f4dSGeorge Wilson 445*9eb19f4dSGeorge Wilson void 446*9eb19f4dSGeorge Wilson ddt_get_dedup_stats(spa_t *spa, ddt_stat_t *dds_total) 447*9eb19f4dSGeorge Wilson { 448*9eb19f4dSGeorge Wilson ddt_histogram_t *ddh_total; 449b24ab676SJeff Bonwick 450*9eb19f4dSGeorge Wilson ddh_total = kmem_zalloc(sizeof (ddt_histogram_t), KM_SLEEP); 451*9eb19f4dSGeorge Wilson ddt_get_dedup_histogram(spa, ddh_total); 452*9eb19f4dSGeorge Wilson ddt_histogram_stat(dds_total, ddh_total); 453*9eb19f4dSGeorge Wilson kmem_free(ddh_total, sizeof (ddt_histogram_t)); 454485bbbf5SGeorge Wilson } 455485bbbf5SGeorge Wilson 456485bbbf5SGeorge Wilson uint64_t 457485bbbf5SGeorge Wilson ddt_get_dedup_dspace(spa_t *spa) 458485bbbf5SGeorge Wilson { 459485bbbf5SGeorge Wilson ddt_stat_t dds_total = { 0 }; 460485bbbf5SGeorge Wilson 461485bbbf5SGeorge Wilson ddt_get_dedup_stats(spa, &dds_total); 462485bbbf5SGeorge Wilson return (dds_total.dds_ref_dsize - dds_total.dds_dsize); 463485bbbf5SGeorge Wilson } 464485bbbf5SGeorge Wilson 465485bbbf5SGeorge Wilson uint64_t 466485bbbf5SGeorge Wilson ddt_get_pool_dedup_ratio(spa_t *spa) 467485bbbf5SGeorge Wilson { 468485bbbf5SGeorge Wilson ddt_stat_t dds_total = { 0 }; 469b24ab676SJeff Bonwick 470485bbbf5SGeorge Wilson ddt_get_dedup_stats(spa, &dds_total); 471b24ab676SJeff Bonwick if (dds_total.dds_dsize == 0) 472b24ab676SJeff Bonwick return (100); 473b24ab676SJeff Bonwick 474b24ab676SJeff Bonwick return (dds_total.dds_ref_dsize * 100 / dds_total.dds_dsize); 475b24ab676SJeff Bonwick } 476b24ab676SJeff Bonwick 477b24ab676SJeff Bonwick int 478b24ab676SJeff Bonwick ddt_ditto_copies_needed(ddt_t *ddt, ddt_entry_t *dde, ddt_phys_t *ddp_willref) 479b24ab676SJeff Bonwick { 480b24ab676SJeff Bonwick spa_t *spa = ddt->ddt_spa; 481b24ab676SJeff Bonwick uint64_t total_refcnt = 0; 482b24ab676SJeff Bonwick uint64_t ditto = spa->spa_dedup_ditto; 483b24ab676SJeff Bonwick int total_copies = 0; 484b24ab676SJeff Bonwick int desired_copies = 0; 485b24ab676SJeff Bonwick 486b24ab676SJeff Bonwick for (int p = DDT_PHYS_SINGLE; p <= DDT_PHYS_TRIPLE; p++) { 487b24ab676SJeff Bonwick ddt_phys_t *ddp = &dde->dde_phys[p]; 488b24ab676SJeff Bonwick zio_t *zio = dde->dde_lead_zio[p]; 489b24ab676SJeff Bonwick uint64_t refcnt = ddp->ddp_refcnt; /* committed refs */ 490b24ab676SJeff Bonwick if (zio != NULL) 491b24ab676SJeff Bonwick refcnt += zio->io_parent_count; /* pending refs */ 492b24ab676SJeff Bonwick if (ddp == ddp_willref) 493b24ab676SJeff Bonwick refcnt++; /* caller's ref */ 494b24ab676SJeff Bonwick if (refcnt != 0) { 495b24ab676SJeff Bonwick total_refcnt += refcnt; 496b24ab676SJeff Bonwick total_copies += p; 497b24ab676SJeff Bonwick } 498b24ab676SJeff Bonwick } 499b24ab676SJeff Bonwick 500b24ab676SJeff Bonwick if (ditto == 0 || ditto > UINT32_MAX) 501b24ab676SJeff Bonwick ditto = UINT32_MAX; 502b24ab676SJeff Bonwick 503b24ab676SJeff Bonwick if (total_refcnt >= 1) 504b24ab676SJeff Bonwick desired_copies++; 505b24ab676SJeff Bonwick if (total_refcnt >= ditto) 506b24ab676SJeff Bonwick desired_copies++; 507b24ab676SJeff Bonwick if (total_refcnt >= ditto * ditto) 508b24ab676SJeff Bonwick desired_copies++; 509b24ab676SJeff Bonwick 510b24ab676SJeff Bonwick return (MAX(desired_copies, total_copies) - total_copies); 511b24ab676SJeff Bonwick } 512b24ab676SJeff Bonwick 513b24ab676SJeff Bonwick int 514b24ab676SJeff Bonwick ddt_ditto_copies_present(ddt_entry_t *dde) 515b24ab676SJeff Bonwick { 516b24ab676SJeff Bonwick ddt_phys_t *ddp = &dde->dde_phys[DDT_PHYS_DITTO]; 517b24ab676SJeff Bonwick dva_t *dva = ddp->ddp_dva; 518b24ab676SJeff Bonwick int copies = 0 - DVA_GET_GANG(dva); 519b24ab676SJeff Bonwick 520b24ab676SJeff Bonwick for (int d = 0; d < SPA_DVAS_PER_BP; d++, dva++) 521b24ab676SJeff Bonwick if (DVA_IS_VALID(dva)) 522b24ab676SJeff Bonwick copies++; 523b24ab676SJeff Bonwick 524b24ab676SJeff Bonwick ASSERT(copies >= 0 && copies < SPA_DVAS_PER_BP); 525b24ab676SJeff Bonwick 526b24ab676SJeff Bonwick return (copies); 527b24ab676SJeff Bonwick } 528b24ab676SJeff Bonwick 529b24ab676SJeff Bonwick size_t 530b24ab676SJeff Bonwick ddt_compress(void *src, uchar_t *dst, size_t s_len, size_t d_len) 531b24ab676SJeff Bonwick { 532b24ab676SJeff Bonwick uchar_t *version = dst++; 533b24ab676SJeff Bonwick int cpfunc = ZIO_COMPRESS_ZLE; 534b24ab676SJeff Bonwick zio_compress_info_t *ci = &zio_compress_table[cpfunc]; 535b24ab676SJeff Bonwick size_t c_len; 536b24ab676SJeff Bonwick 537b24ab676SJeff Bonwick ASSERT(d_len >= s_len + 1); /* no compression plus version byte */ 538b24ab676SJeff Bonwick 539b24ab676SJeff Bonwick c_len = ci->ci_compress(src, dst, s_len, d_len - 1, ci->ci_level); 540b24ab676SJeff Bonwick 541b24ab676SJeff Bonwick if (c_len == s_len) { 542b24ab676SJeff Bonwick cpfunc = ZIO_COMPRESS_OFF; 543b24ab676SJeff Bonwick bcopy(src, dst, s_len); 544b24ab676SJeff Bonwick } 545b24ab676SJeff Bonwick 546b24ab676SJeff Bonwick *version = (ZFS_HOST_BYTEORDER & DDT_COMPRESS_BYTEORDER_MASK) | cpfunc; 547b24ab676SJeff Bonwick 548b24ab676SJeff Bonwick return (c_len + 1); 549b24ab676SJeff Bonwick } 550b24ab676SJeff Bonwick 551b24ab676SJeff Bonwick void 552b24ab676SJeff Bonwick ddt_decompress(uchar_t *src, void *dst, size_t s_len, size_t d_len) 553b24ab676SJeff Bonwick { 554b24ab676SJeff Bonwick uchar_t version = *src++; 555b24ab676SJeff Bonwick int cpfunc = version & DDT_COMPRESS_FUNCTION_MASK; 556b24ab676SJeff Bonwick zio_compress_info_t *ci = &zio_compress_table[cpfunc]; 557b24ab676SJeff Bonwick 558b24ab676SJeff Bonwick if (ci->ci_decompress != NULL) 559b24ab676SJeff Bonwick (void) ci->ci_decompress(src, dst, s_len, d_len, ci->ci_level); 560b24ab676SJeff Bonwick else 561b24ab676SJeff Bonwick bcopy(src, dst, d_len); 562b24ab676SJeff Bonwick 563b24ab676SJeff Bonwick if ((version ^ ZFS_HOST_BYTEORDER) & DDT_COMPRESS_BYTEORDER_MASK) 564b24ab676SJeff Bonwick byteswap_uint64_array(dst, d_len); 565b24ab676SJeff Bonwick } 566b24ab676SJeff Bonwick 567b24ab676SJeff Bonwick ddt_t * 568b24ab676SJeff Bonwick ddt_select_by_checksum(spa_t *spa, enum zio_checksum c) 569b24ab676SJeff Bonwick { 570b24ab676SJeff Bonwick return (spa->spa_ddt[c]); 571b24ab676SJeff Bonwick } 572b24ab676SJeff Bonwick 573b24ab676SJeff Bonwick ddt_t * 574b24ab676SJeff Bonwick ddt_select(spa_t *spa, const blkptr_t *bp) 575b24ab676SJeff Bonwick { 576b24ab676SJeff Bonwick return (spa->spa_ddt[BP_GET_CHECKSUM(bp)]); 577b24ab676SJeff Bonwick } 578b24ab676SJeff Bonwick 579b24ab676SJeff Bonwick void 580b24ab676SJeff Bonwick ddt_enter(ddt_t *ddt) 581b24ab676SJeff Bonwick { 582b24ab676SJeff Bonwick mutex_enter(&ddt->ddt_lock); 583b24ab676SJeff Bonwick } 584b24ab676SJeff Bonwick 585b24ab676SJeff Bonwick void 586b24ab676SJeff Bonwick ddt_exit(ddt_t *ddt) 587b24ab676SJeff Bonwick { 588b24ab676SJeff Bonwick mutex_exit(&ddt->ddt_lock); 589b24ab676SJeff Bonwick } 590b24ab676SJeff Bonwick 591b24ab676SJeff Bonwick static ddt_entry_t * 592b24ab676SJeff Bonwick ddt_alloc(const ddt_key_t *ddk) 593b24ab676SJeff Bonwick { 594b24ab676SJeff Bonwick ddt_entry_t *dde; 595b24ab676SJeff Bonwick 596b24ab676SJeff Bonwick dde = kmem_zalloc(sizeof (ddt_entry_t), KM_SLEEP); 597b24ab676SJeff Bonwick cv_init(&dde->dde_cv, NULL, CV_DEFAULT, NULL); 598b24ab676SJeff Bonwick 599b24ab676SJeff Bonwick dde->dde_key = *ddk; 600b24ab676SJeff Bonwick 601b24ab676SJeff Bonwick return (dde); 602b24ab676SJeff Bonwick } 603b24ab676SJeff Bonwick 604b24ab676SJeff Bonwick static void 605b24ab676SJeff Bonwick ddt_free(ddt_entry_t *dde) 606b24ab676SJeff Bonwick { 607b24ab676SJeff Bonwick ASSERT(!dde->dde_loading); 608b24ab676SJeff Bonwick 609b24ab676SJeff Bonwick for (int p = 0; p < DDT_PHYS_TYPES; p++) 610b24ab676SJeff Bonwick ASSERT(dde->dde_lead_zio[p] == NULL); 611b24ab676SJeff Bonwick 612b24ab676SJeff Bonwick if (dde->dde_repair_data != NULL) 613b24ab676SJeff Bonwick zio_buf_free(dde->dde_repair_data, 614b24ab676SJeff Bonwick DDK_GET_PSIZE(&dde->dde_key)); 615b24ab676SJeff Bonwick 616b24ab676SJeff Bonwick cv_destroy(&dde->dde_cv); 617b24ab676SJeff Bonwick kmem_free(dde, sizeof (*dde)); 618b24ab676SJeff Bonwick } 619b24ab676SJeff Bonwick 620b24ab676SJeff Bonwick void 621b24ab676SJeff Bonwick ddt_remove(ddt_t *ddt, ddt_entry_t *dde) 622b24ab676SJeff Bonwick { 623b24ab676SJeff Bonwick ASSERT(MUTEX_HELD(&ddt->ddt_lock)); 624b24ab676SJeff Bonwick 625b24ab676SJeff Bonwick avl_remove(&ddt->ddt_tree, dde); 626b24ab676SJeff Bonwick ddt_free(dde); 627b24ab676SJeff Bonwick } 628b24ab676SJeff Bonwick 629b24ab676SJeff Bonwick ddt_entry_t * 630b24ab676SJeff Bonwick ddt_lookup(ddt_t *ddt, const blkptr_t *bp, boolean_t add) 631b24ab676SJeff Bonwick { 632b24ab676SJeff Bonwick ddt_entry_t *dde, dde_search; 633b24ab676SJeff Bonwick enum ddt_type type; 634b24ab676SJeff Bonwick enum ddt_class class; 635b24ab676SJeff Bonwick avl_index_t where; 636b24ab676SJeff Bonwick int error; 637b24ab676SJeff Bonwick 638b24ab676SJeff Bonwick ASSERT(MUTEX_HELD(&ddt->ddt_lock)); 639b24ab676SJeff Bonwick 640b24ab676SJeff Bonwick ddt_key_fill(&dde_search.dde_key, bp); 641b24ab676SJeff Bonwick 642b24ab676SJeff Bonwick dde = avl_find(&ddt->ddt_tree, &dde_search, &where); 643b24ab676SJeff Bonwick if (dde == NULL) { 644b24ab676SJeff Bonwick if (!add) 645b24ab676SJeff Bonwick return (NULL); 646b24ab676SJeff Bonwick dde = ddt_alloc(&dde_search.dde_key); 647b24ab676SJeff Bonwick avl_insert(&ddt->ddt_tree, dde, where); 648b24ab676SJeff Bonwick } 649b24ab676SJeff Bonwick 650b24ab676SJeff Bonwick while (dde->dde_loading) 651b24ab676SJeff Bonwick cv_wait(&dde->dde_cv, &ddt->ddt_lock); 652b24ab676SJeff Bonwick 653b24ab676SJeff Bonwick if (dde->dde_loaded) 654b24ab676SJeff Bonwick return (dde); 655b24ab676SJeff Bonwick 656b24ab676SJeff Bonwick dde->dde_loading = B_TRUE; 657b24ab676SJeff Bonwick 658b24ab676SJeff Bonwick ddt_exit(ddt); 659b24ab676SJeff Bonwick 660b24ab676SJeff Bonwick error = ENOENT; 661b24ab676SJeff Bonwick 662b24ab676SJeff Bonwick for (type = 0; type < DDT_TYPES; type++) { 663b24ab676SJeff Bonwick for (class = 0; class < DDT_CLASSES; class++) { 664b24ab676SJeff Bonwick error = ddt_object_lookup(ddt, type, class, dde); 665b24ab676SJeff Bonwick if (error != ENOENT) 666b24ab676SJeff Bonwick break; 667b24ab676SJeff Bonwick } 668b24ab676SJeff Bonwick if (error != ENOENT) 669b24ab676SJeff Bonwick break; 670b24ab676SJeff Bonwick } 671b24ab676SJeff Bonwick 672b24ab676SJeff Bonwick ASSERT(error == 0 || error == ENOENT); 673b24ab676SJeff Bonwick 674b24ab676SJeff Bonwick ddt_enter(ddt); 675b24ab676SJeff Bonwick 676b24ab676SJeff Bonwick ASSERT(dde->dde_loaded == B_FALSE); 677b24ab676SJeff Bonwick ASSERT(dde->dde_loading == B_TRUE); 678b24ab676SJeff Bonwick 679b24ab676SJeff Bonwick dde->dde_type = type; /* will be DDT_TYPES if no entry found */ 680b24ab676SJeff Bonwick dde->dde_class = class; /* will be DDT_CLASSES if no entry found */ 681b24ab676SJeff Bonwick dde->dde_loaded = B_TRUE; 682b24ab676SJeff Bonwick dde->dde_loading = B_FALSE; 683b24ab676SJeff Bonwick 684b24ab676SJeff Bonwick if (error == 0) 685b24ab676SJeff Bonwick ddt_stat_update(ddt, dde, -1ULL); 686b24ab676SJeff Bonwick 687b24ab676SJeff Bonwick cv_broadcast(&dde->dde_cv); 688b24ab676SJeff Bonwick 689b24ab676SJeff Bonwick return (dde); 690b24ab676SJeff Bonwick } 691b24ab676SJeff Bonwick 692b24ab676SJeff Bonwick int 693b24ab676SJeff Bonwick ddt_entry_compare(const void *x1, const void *x2) 694b24ab676SJeff Bonwick { 695b24ab676SJeff Bonwick const ddt_entry_t *dde1 = x1; 696b24ab676SJeff Bonwick const ddt_entry_t *dde2 = x2; 697b24ab676SJeff Bonwick const uint64_t *u1 = (const uint64_t *)&dde1->dde_key; 698b24ab676SJeff Bonwick const uint64_t *u2 = (const uint64_t *)&dde2->dde_key; 699b24ab676SJeff Bonwick 700b24ab676SJeff Bonwick for (int i = 0; i < DDT_KEY_WORDS; i++) { 701b24ab676SJeff Bonwick if (u1[i] < u2[i]) 702b24ab676SJeff Bonwick return (-1); 703b24ab676SJeff Bonwick if (u1[i] > u2[i]) 704b24ab676SJeff Bonwick return (1); 705b24ab676SJeff Bonwick } 706b24ab676SJeff Bonwick 707b24ab676SJeff Bonwick return (0); 708b24ab676SJeff Bonwick } 709b24ab676SJeff Bonwick 710b24ab676SJeff Bonwick static ddt_t * 711b24ab676SJeff Bonwick ddt_table_alloc(spa_t *spa, enum zio_checksum c) 712b24ab676SJeff Bonwick { 713b24ab676SJeff Bonwick ddt_t *ddt; 714b24ab676SJeff Bonwick 715b24ab676SJeff Bonwick ddt = kmem_zalloc(sizeof (*ddt), KM_SLEEP); 716b24ab676SJeff Bonwick 717b24ab676SJeff Bonwick mutex_init(&ddt->ddt_lock, NULL, MUTEX_DEFAULT, NULL); 718b24ab676SJeff Bonwick avl_create(&ddt->ddt_tree, ddt_entry_compare, 719b24ab676SJeff Bonwick sizeof (ddt_entry_t), offsetof(ddt_entry_t, dde_node)); 720b24ab676SJeff Bonwick avl_create(&ddt->ddt_repair_tree, ddt_entry_compare, 721b24ab676SJeff Bonwick sizeof (ddt_entry_t), offsetof(ddt_entry_t, dde_node)); 722b24ab676SJeff Bonwick ddt->ddt_checksum = c; 723b24ab676SJeff Bonwick ddt->ddt_spa = spa; 724b24ab676SJeff Bonwick ddt->ddt_os = spa->spa_meta_objset; 725b24ab676SJeff Bonwick 726b24ab676SJeff Bonwick return (ddt); 727b24ab676SJeff Bonwick } 728b24ab676SJeff Bonwick 729b24ab676SJeff Bonwick static void 730b24ab676SJeff Bonwick ddt_table_free(ddt_t *ddt) 731b24ab676SJeff Bonwick { 732b24ab676SJeff Bonwick ASSERT(avl_numnodes(&ddt->ddt_tree) == 0); 733b24ab676SJeff Bonwick ASSERT(avl_numnodes(&ddt->ddt_repair_tree) == 0); 734b24ab676SJeff Bonwick avl_destroy(&ddt->ddt_tree); 735b24ab676SJeff Bonwick avl_destroy(&ddt->ddt_repair_tree); 736b24ab676SJeff Bonwick mutex_destroy(&ddt->ddt_lock); 737b24ab676SJeff Bonwick kmem_free(ddt, sizeof (*ddt)); 738b24ab676SJeff Bonwick } 739b24ab676SJeff Bonwick 740b24ab676SJeff Bonwick void 741b24ab676SJeff Bonwick ddt_create(spa_t *spa) 742b24ab676SJeff Bonwick { 743b24ab676SJeff Bonwick spa->spa_dedup_checksum = ZIO_DEDUPCHECKSUM; 744b24ab676SJeff Bonwick 745b24ab676SJeff Bonwick for (enum zio_checksum c = 0; c < ZIO_CHECKSUM_FUNCTIONS; c++) 746b24ab676SJeff Bonwick spa->spa_ddt[c] = ddt_table_alloc(spa, c); 747b24ab676SJeff Bonwick } 748b24ab676SJeff Bonwick 749b24ab676SJeff Bonwick int 750b24ab676SJeff Bonwick ddt_load(spa_t *spa) 751b24ab676SJeff Bonwick { 752b24ab676SJeff Bonwick int error; 753b24ab676SJeff Bonwick 754b24ab676SJeff Bonwick ddt_create(spa); 755b24ab676SJeff Bonwick 756b24ab676SJeff Bonwick error = zap_lookup(spa->spa_meta_objset, DMU_POOL_DIRECTORY_OBJECT, 757b24ab676SJeff Bonwick DMU_POOL_DDT_STATS, sizeof (uint64_t), 1, 758b24ab676SJeff Bonwick &spa->spa_ddt_stat_object); 759b24ab676SJeff Bonwick 760b24ab676SJeff Bonwick if (error) 761b24ab676SJeff Bonwick return (error == ENOENT ? 0 : error); 762b24ab676SJeff Bonwick 763b24ab676SJeff Bonwick for (enum zio_checksum c = 0; c < ZIO_CHECKSUM_FUNCTIONS; c++) { 764b24ab676SJeff Bonwick for (enum ddt_type type = 0; type < DDT_TYPES; type++) { 765b24ab676SJeff Bonwick for (enum ddt_class class = 0; class < DDT_CLASSES; 766b24ab676SJeff Bonwick class++) { 767b24ab676SJeff Bonwick ddt_t *ddt = spa->spa_ddt[c]; 768b24ab676SJeff Bonwick error = ddt_object_load(ddt, type, class); 769b24ab676SJeff Bonwick if (error != 0 && error != ENOENT) 770b24ab676SJeff Bonwick return (error); 771b24ab676SJeff Bonwick } 772b24ab676SJeff Bonwick } 773b24ab676SJeff Bonwick } 774b24ab676SJeff Bonwick 775b24ab676SJeff Bonwick return (0); 776b24ab676SJeff Bonwick } 777b24ab676SJeff Bonwick 778b24ab676SJeff Bonwick void 779b24ab676SJeff Bonwick ddt_unload(spa_t *spa) 780b24ab676SJeff Bonwick { 781b24ab676SJeff Bonwick for (enum zio_checksum c = 0; c < ZIO_CHECKSUM_FUNCTIONS; c++) { 782b24ab676SJeff Bonwick if (spa->spa_ddt[c]) { 783b24ab676SJeff Bonwick ddt_table_free(spa->spa_ddt[c]); 784b24ab676SJeff Bonwick spa->spa_ddt[c] = NULL; 785b24ab676SJeff Bonwick } 786b24ab676SJeff Bonwick } 787b24ab676SJeff Bonwick } 788b24ab676SJeff Bonwick 789bbfd46c4SJeff Bonwick boolean_t 790bbfd46c4SJeff Bonwick ddt_class_contains(spa_t *spa, enum ddt_class max_class, const blkptr_t *bp) 791bbfd46c4SJeff Bonwick { 792bbfd46c4SJeff Bonwick ddt_t *ddt; 793bbfd46c4SJeff Bonwick ddt_entry_t dde; 794bbfd46c4SJeff Bonwick 795bbfd46c4SJeff Bonwick if (!BP_GET_DEDUP(bp)) 796bbfd46c4SJeff Bonwick return (B_FALSE); 797bbfd46c4SJeff Bonwick 798bbfd46c4SJeff Bonwick if (max_class == DDT_CLASS_UNIQUE) 799bbfd46c4SJeff Bonwick return (B_TRUE); 800bbfd46c4SJeff Bonwick 801bbfd46c4SJeff Bonwick ddt = spa->spa_ddt[BP_GET_CHECKSUM(bp)]; 802bbfd46c4SJeff Bonwick 803bbfd46c4SJeff Bonwick ddt_key_fill(&dde.dde_key, bp); 804bbfd46c4SJeff Bonwick 805bbfd46c4SJeff Bonwick for (enum ddt_type type = 0; type < DDT_TYPES; type++) 806bbfd46c4SJeff Bonwick for (enum ddt_class class = 0; class <= max_class; class++) 807bbfd46c4SJeff Bonwick if (ddt_object_lookup(ddt, type, class, &dde) == 0) 808bbfd46c4SJeff Bonwick return (B_TRUE); 809bbfd46c4SJeff Bonwick 810bbfd46c4SJeff Bonwick return (B_FALSE); 811bbfd46c4SJeff Bonwick } 812bbfd46c4SJeff Bonwick 813b24ab676SJeff Bonwick ddt_entry_t * 814b24ab676SJeff Bonwick ddt_repair_start(ddt_t *ddt, const blkptr_t *bp) 815b24ab676SJeff Bonwick { 816b24ab676SJeff Bonwick ddt_key_t ddk; 817b24ab676SJeff Bonwick ddt_entry_t *dde; 818b24ab676SJeff Bonwick 819b24ab676SJeff Bonwick ddt_key_fill(&ddk, bp); 820b24ab676SJeff Bonwick 821b24ab676SJeff Bonwick dde = ddt_alloc(&ddk); 822b24ab676SJeff Bonwick 823b24ab676SJeff Bonwick for (enum ddt_type type = 0; type < DDT_TYPES; type++) { 824b24ab676SJeff Bonwick for (enum ddt_class class = 0; class < DDT_CLASSES; class++) { 825b24ab676SJeff Bonwick /* 826b24ab676SJeff Bonwick * We can only do repair if there are multiple copies 827b24ab676SJeff Bonwick * of the block. For anything in the UNIQUE class, 828b24ab676SJeff Bonwick * there's definitely only one copy, so don't even try. 829b24ab676SJeff Bonwick */ 830b24ab676SJeff Bonwick if (class != DDT_CLASS_UNIQUE && 831b24ab676SJeff Bonwick ddt_object_lookup(ddt, type, class, dde) == 0) 832b24ab676SJeff Bonwick return (dde); 833b24ab676SJeff Bonwick } 834b24ab676SJeff Bonwick } 835b24ab676SJeff Bonwick 836b24ab676SJeff Bonwick bzero(dde->dde_phys, sizeof (dde->dde_phys)); 837b24ab676SJeff Bonwick 838b24ab676SJeff Bonwick return (dde); 839b24ab676SJeff Bonwick } 840b24ab676SJeff Bonwick 841b24ab676SJeff Bonwick void 842b24ab676SJeff Bonwick ddt_repair_done(ddt_t *ddt, ddt_entry_t *dde) 843b24ab676SJeff Bonwick { 844b24ab676SJeff Bonwick avl_index_t where; 845b24ab676SJeff Bonwick 846b24ab676SJeff Bonwick ddt_enter(ddt); 847b24ab676SJeff Bonwick 848b24ab676SJeff Bonwick if (dde->dde_repair_data != NULL && spa_writeable(ddt->ddt_spa) && 849b24ab676SJeff Bonwick avl_find(&ddt->ddt_repair_tree, dde, &where) == NULL) 850b24ab676SJeff Bonwick avl_insert(&ddt->ddt_repair_tree, dde, where); 851b24ab676SJeff Bonwick else 852b24ab676SJeff Bonwick ddt_free(dde); 853b24ab676SJeff Bonwick 854b24ab676SJeff Bonwick ddt_exit(ddt); 855b24ab676SJeff Bonwick } 856b24ab676SJeff Bonwick 857b24ab676SJeff Bonwick static void 858b24ab676SJeff Bonwick ddt_repair_entry_done(zio_t *zio) 859b24ab676SJeff Bonwick { 860b24ab676SJeff Bonwick ddt_entry_t *rdde = zio->io_private; 861b24ab676SJeff Bonwick 862b24ab676SJeff Bonwick ddt_free(rdde); 863b24ab676SJeff Bonwick } 864b24ab676SJeff Bonwick 865b24ab676SJeff Bonwick static void 866b24ab676SJeff Bonwick ddt_repair_entry(ddt_t *ddt, ddt_entry_t *dde, ddt_entry_t *rdde, zio_t *rio) 867b24ab676SJeff Bonwick { 868b24ab676SJeff Bonwick ddt_phys_t *ddp = dde->dde_phys; 869b24ab676SJeff Bonwick ddt_phys_t *rddp = rdde->dde_phys; 870b24ab676SJeff Bonwick ddt_key_t *ddk = &dde->dde_key; 871b24ab676SJeff Bonwick ddt_key_t *rddk = &rdde->dde_key; 872b24ab676SJeff Bonwick zio_t *zio; 873b24ab676SJeff Bonwick blkptr_t blk; 874b24ab676SJeff Bonwick 875b24ab676SJeff Bonwick zio = zio_null(rio, rio->io_spa, NULL, 876b24ab676SJeff Bonwick ddt_repair_entry_done, rdde, rio->io_flags); 877b24ab676SJeff Bonwick 878b24ab676SJeff Bonwick for (int p = 0; p < DDT_PHYS_TYPES; p++, ddp++, rddp++) { 879b24ab676SJeff Bonwick if (ddp->ddp_phys_birth == 0 || 880b24ab676SJeff Bonwick ddp->ddp_phys_birth != rddp->ddp_phys_birth || 881b24ab676SJeff Bonwick bcmp(ddp->ddp_dva, rddp->ddp_dva, sizeof (ddp->ddp_dva))) 882b24ab676SJeff Bonwick continue; 883bbfd46c4SJeff Bonwick ddt_bp_create(ddt->ddt_checksum, ddk, ddp, &blk); 884b24ab676SJeff Bonwick zio_nowait(zio_rewrite(zio, zio->io_spa, 0, &blk, 885b24ab676SJeff Bonwick rdde->dde_repair_data, DDK_GET_PSIZE(rddk), NULL, NULL, 886b24ab676SJeff Bonwick ZIO_PRIORITY_SYNC_WRITE, ZIO_DDT_CHILD_FLAGS(zio), NULL)); 887b24ab676SJeff Bonwick } 888b24ab676SJeff Bonwick 889b24ab676SJeff Bonwick zio_nowait(zio); 890b24ab676SJeff Bonwick } 891b24ab676SJeff Bonwick 892b24ab676SJeff Bonwick static void 893b24ab676SJeff Bonwick ddt_repair_table(ddt_t *ddt, zio_t *rio) 894b24ab676SJeff Bonwick { 895b24ab676SJeff Bonwick spa_t *spa = ddt->ddt_spa; 896b24ab676SJeff Bonwick ddt_entry_t *dde, *rdde_next, *rdde; 897b24ab676SJeff Bonwick avl_tree_t *t = &ddt->ddt_repair_tree; 898b24ab676SJeff Bonwick blkptr_t blk; 899b24ab676SJeff Bonwick 900b24ab676SJeff Bonwick if (spa_sync_pass(spa) > 1) 901b24ab676SJeff Bonwick return; 902b24ab676SJeff Bonwick 903b24ab676SJeff Bonwick ddt_enter(ddt); 904b24ab676SJeff Bonwick for (rdde = avl_first(t); rdde != NULL; rdde = rdde_next) { 905b24ab676SJeff Bonwick rdde_next = AVL_NEXT(t, rdde); 906b24ab676SJeff Bonwick avl_remove(&ddt->ddt_repair_tree, rdde); 907b24ab676SJeff Bonwick ddt_exit(ddt); 908bbfd46c4SJeff Bonwick ddt_bp_create(ddt->ddt_checksum, &rdde->dde_key, NULL, &blk); 909b24ab676SJeff Bonwick dde = ddt_repair_start(ddt, &blk); 910b24ab676SJeff Bonwick ddt_repair_entry(ddt, dde, rdde, rio); 911b24ab676SJeff Bonwick ddt_repair_done(ddt, dde); 912b24ab676SJeff Bonwick ddt_enter(ddt); 913b24ab676SJeff Bonwick } 914b24ab676SJeff Bonwick ddt_exit(ddt); 915b24ab676SJeff Bonwick } 916b24ab676SJeff Bonwick 917b24ab676SJeff Bonwick static void 918b24ab676SJeff Bonwick ddt_sync_entry(ddt_t *ddt, ddt_entry_t *dde, dmu_tx_t *tx, uint64_t txg) 919b24ab676SJeff Bonwick { 920bbfd46c4SJeff Bonwick dsl_pool_t *dp = ddt->ddt_spa->spa_dsl_pool; 921b24ab676SJeff Bonwick ddt_phys_t *ddp = dde->dde_phys; 922b24ab676SJeff Bonwick ddt_key_t *ddk = &dde->dde_key; 923b24ab676SJeff Bonwick enum ddt_type otype = dde->dde_type; 924b24ab676SJeff Bonwick enum ddt_type ntype = DDT_TYPE_CURRENT; 925b24ab676SJeff Bonwick enum ddt_class oclass = dde->dde_class; 926b24ab676SJeff Bonwick enum ddt_class nclass; 927b24ab676SJeff Bonwick uint64_t total_refcnt = 0; 928b24ab676SJeff Bonwick 929b24ab676SJeff Bonwick ASSERT(dde->dde_loaded); 930b24ab676SJeff Bonwick ASSERT(!dde->dde_loading); 931b24ab676SJeff Bonwick 932b24ab676SJeff Bonwick for (int p = 0; p < DDT_PHYS_TYPES; p++, ddp++) { 933b24ab676SJeff Bonwick ASSERT(dde->dde_lead_zio[p] == NULL); 934b24ab676SJeff Bonwick ASSERT((int64_t)ddp->ddp_refcnt >= 0); 935b24ab676SJeff Bonwick if (ddp->ddp_phys_birth == 0) { 936b24ab676SJeff Bonwick ASSERT(ddp->ddp_refcnt == 0); 937b24ab676SJeff Bonwick continue; 938b24ab676SJeff Bonwick } 939b24ab676SJeff Bonwick if (p == DDT_PHYS_DITTO) { 940b24ab676SJeff Bonwick if (ddt_ditto_copies_needed(ddt, dde, NULL) == 0) 941b24ab676SJeff Bonwick ddt_phys_free(ddt, ddk, ddp, txg); 942b24ab676SJeff Bonwick continue; 943b24ab676SJeff Bonwick } 944b24ab676SJeff Bonwick if (ddp->ddp_refcnt == 0) 945b24ab676SJeff Bonwick ddt_phys_free(ddt, ddk, ddp, txg); 946b24ab676SJeff Bonwick total_refcnt += ddp->ddp_refcnt; 947b24ab676SJeff Bonwick } 948b24ab676SJeff Bonwick 949b24ab676SJeff Bonwick if (dde->dde_phys[DDT_PHYS_DITTO].ddp_phys_birth != 0) 950b24ab676SJeff Bonwick nclass = DDT_CLASS_DITTO; 951b24ab676SJeff Bonwick else if (total_refcnt > 1) 952b24ab676SJeff Bonwick nclass = DDT_CLASS_DUPLICATE; 953b24ab676SJeff Bonwick else 954b24ab676SJeff Bonwick nclass = DDT_CLASS_UNIQUE; 955b24ab676SJeff Bonwick 956b24ab676SJeff Bonwick if (otype != DDT_TYPES && 957b24ab676SJeff Bonwick (otype != ntype || oclass != nclass || total_refcnt == 0)) { 958b24ab676SJeff Bonwick VERIFY(ddt_object_remove(ddt, otype, oclass, dde, tx) == 0); 959b24ab676SJeff Bonwick ASSERT(ddt_object_lookup(ddt, otype, oclass, dde) == ENOENT); 960b24ab676SJeff Bonwick } 961b24ab676SJeff Bonwick 962b24ab676SJeff Bonwick if (total_refcnt != 0) { 963b24ab676SJeff Bonwick dde->dde_type = ntype; 964b24ab676SJeff Bonwick dde->dde_class = nclass; 965b24ab676SJeff Bonwick ddt_stat_update(ddt, dde, 0); 966b24ab676SJeff Bonwick if (!ddt_object_exists(ddt, ntype, nclass)) 967b24ab676SJeff Bonwick ddt_object_create(ddt, ntype, nclass, tx); 968b24ab676SJeff Bonwick VERIFY(ddt_object_update(ddt, ntype, nclass, dde, tx) == 0); 969bbfd46c4SJeff Bonwick 970bbfd46c4SJeff Bonwick if (dp->dp_scrub_func != SCRUB_FUNC_NONE && 971bbfd46c4SJeff Bonwick oclass > dp->dp_scrub_ddt_class_max && 972bbfd46c4SJeff Bonwick nclass <= dp->dp_scrub_ddt_class_max) 973bbfd46c4SJeff Bonwick dsl_pool_scrub_ddt_entry(dp, ddt->ddt_checksum, dde); 974b24ab676SJeff Bonwick } 975b24ab676SJeff Bonwick } 976b24ab676SJeff Bonwick 977b24ab676SJeff Bonwick static void 978b24ab676SJeff Bonwick ddt_sync_table(ddt_t *ddt, dmu_tx_t *tx, uint64_t txg) 979b24ab676SJeff Bonwick { 980b24ab676SJeff Bonwick spa_t *spa = ddt->ddt_spa; 981b24ab676SJeff Bonwick ddt_entry_t *dde; 982b24ab676SJeff Bonwick void *cookie = NULL; 983b24ab676SJeff Bonwick 984b24ab676SJeff Bonwick if (avl_numnodes(&ddt->ddt_tree) == 0) 985b24ab676SJeff Bonwick return; 986b24ab676SJeff Bonwick 987b24ab676SJeff Bonwick ASSERT(spa_sync_pass(spa) == 1); 988b24ab676SJeff Bonwick ASSERT(spa->spa_uberblock.ub_version >= SPA_VERSION_DEDUP); 989b24ab676SJeff Bonwick 990b24ab676SJeff Bonwick if (spa->spa_ddt_stat_object == 0) { 991b24ab676SJeff Bonwick spa->spa_ddt_stat_object = zap_create(ddt->ddt_os, 992b24ab676SJeff Bonwick DMU_OT_DDT_STATS, DMU_OT_NONE, 0, tx); 993b24ab676SJeff Bonwick VERIFY(zap_add(ddt->ddt_os, DMU_POOL_DIRECTORY_OBJECT, 994b24ab676SJeff Bonwick DMU_POOL_DDT_STATS, sizeof (uint64_t), 1, 995b24ab676SJeff Bonwick &spa->spa_ddt_stat_object, tx) == 0); 996b24ab676SJeff Bonwick } 997b24ab676SJeff Bonwick 998b24ab676SJeff Bonwick while ((dde = avl_destroy_nodes(&ddt->ddt_tree, &cookie)) != NULL) { 999b24ab676SJeff Bonwick ddt_sync_entry(ddt, dde, tx, txg); 1000b24ab676SJeff Bonwick ddt_free(dde); 1001b24ab676SJeff Bonwick } 1002b24ab676SJeff Bonwick 1003b24ab676SJeff Bonwick for (enum ddt_type type = 0; type < DDT_TYPES; type++) { 1004b24ab676SJeff Bonwick for (enum ddt_class class = 0; class < DDT_CLASSES; class++) { 1005b24ab676SJeff Bonwick if (!ddt_object_exists(ddt, type, class)) 1006b24ab676SJeff Bonwick continue; 1007b24ab676SJeff Bonwick ddt_object_sync(ddt, type, class, tx); 1008b24ab676SJeff Bonwick if (ddt_object_count(ddt, type, class) == 0) 1009b24ab676SJeff Bonwick ddt_object_destroy(ddt, type, class, tx); 1010b24ab676SJeff Bonwick } 1011b24ab676SJeff Bonwick } 1012b24ab676SJeff Bonwick } 1013b24ab676SJeff Bonwick 1014b24ab676SJeff Bonwick void 1015b24ab676SJeff Bonwick ddt_sync(spa_t *spa, uint64_t txg) 1016b24ab676SJeff Bonwick { 1017b24ab676SJeff Bonwick dmu_tx_t *tx; 1018b24ab676SJeff Bonwick zio_t *rio = zio_root(spa, NULL, NULL, 1019b24ab676SJeff Bonwick ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE); 1020b24ab676SJeff Bonwick 1021b24ab676SJeff Bonwick ASSERT(spa_syncing_txg(spa) == txg); 1022b24ab676SJeff Bonwick 1023b24ab676SJeff Bonwick tx = dmu_tx_create_assigned(spa->spa_dsl_pool, txg); 1024b24ab676SJeff Bonwick 1025b24ab676SJeff Bonwick for (enum zio_checksum c = 0; c < ZIO_CHECKSUM_FUNCTIONS; c++) { 1026b24ab676SJeff Bonwick ddt_t *ddt = spa->spa_ddt[c]; 1027b24ab676SJeff Bonwick if (ddt == NULL) 1028b24ab676SJeff Bonwick continue; 1029b24ab676SJeff Bonwick ddt_sync_table(ddt, tx, txg); 1030b24ab676SJeff Bonwick ddt_repair_table(ddt, rio); 1031b24ab676SJeff Bonwick } 1032b24ab676SJeff Bonwick 1033b24ab676SJeff Bonwick (void) zio_wait(rio); 1034b24ab676SJeff Bonwick 1035b24ab676SJeff Bonwick dmu_tx_commit(tx); 1036b24ab676SJeff Bonwick } 1037bbfd46c4SJeff Bonwick 1038bbfd46c4SJeff Bonwick int 1039bbfd46c4SJeff Bonwick ddt_walk(spa_t *spa, ddt_bookmark_t *ddb, ddt_entry_t *dde) 1040bbfd46c4SJeff Bonwick { 1041bbfd46c4SJeff Bonwick do { 1042bbfd46c4SJeff Bonwick do { 1043bbfd46c4SJeff Bonwick do { 1044bbfd46c4SJeff Bonwick ddt_t *ddt = spa->spa_ddt[ddb->ddb_checksum]; 1045bbfd46c4SJeff Bonwick int error = ENOENT; 1046bbfd46c4SJeff Bonwick if (ddt_object_exists(ddt, ddb->ddb_type, 1047bbfd46c4SJeff Bonwick ddb->ddb_class)) { 1048bbfd46c4SJeff Bonwick error = ddt_object_walk(ddt, 1049bbfd46c4SJeff Bonwick ddb->ddb_type, ddb->ddb_class, 1050bbfd46c4SJeff Bonwick &ddb->ddb_cursor, dde); 1051bbfd46c4SJeff Bonwick } 1052bbfd46c4SJeff Bonwick if (error == 0) 1053bbfd46c4SJeff Bonwick return (0); 1054bbfd46c4SJeff Bonwick if (error != ENOENT) 1055bbfd46c4SJeff Bonwick return (error); 1056bbfd46c4SJeff Bonwick ddb->ddb_cursor = 0; 1057bbfd46c4SJeff Bonwick } while (++ddb->ddb_checksum < ZIO_CHECKSUM_FUNCTIONS); 1058bbfd46c4SJeff Bonwick ddb->ddb_checksum = 0; 1059bbfd46c4SJeff Bonwick } while (++ddb->ddb_type < DDT_TYPES); 1060bbfd46c4SJeff Bonwick ddb->ddb_type = 0; 1061bbfd46c4SJeff Bonwick } while (++ddb->ddb_class < DDT_CLASSES); 1062bbfd46c4SJeff Bonwick 1063bbfd46c4SJeff Bonwick return (ENOENT); 1064bbfd46c4SJeff Bonwick } 1065