1fa9e4066Sahrens /* 2fa9e4066Sahrens * CDDL HEADER START 3fa9e4066Sahrens * 4fa9e4066Sahrens * The contents of this file are subject to the terms of the 5f65e61c0Sahrens * Common Development and Distribution License (the "License"). 6f65e61c0Sahrens * You may not use this file except in compliance with the License. 7fa9e4066Sahrens * 8fa9e4066Sahrens * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9fa9e4066Sahrens * or http://www.opensolaris.org/os/licensing. 10fa9e4066Sahrens * See the License for the specific language governing permissions 11fa9e4066Sahrens * and limitations under the License. 12fa9e4066Sahrens * 13fa9e4066Sahrens * When distributing Covered Code, include this CDDL HEADER in each 14fa9e4066Sahrens * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15fa9e4066Sahrens * If applicable, add the following below this CDDL HEADER, with the 16fa9e4066Sahrens * fields enclosed by brackets "[]" replaced with your own identifying 17fa9e4066Sahrens * information: Portions Copyright [yyyy] [name of copyright owner] 18fa9e4066Sahrens * 19fa9e4066Sahrens * CDDL HEADER END 20fa9e4066Sahrens */ 21fa9e4066Sahrens /* 22c25056deSgw * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 23fa9e4066Sahrens * Use is subject to license terms. 24fa9e4066Sahrens */ 25fa9e4066Sahrens 26fa9e4066Sahrens #pragma ident "%Z%%M% %I% %E% SMI" 27fa9e4066Sahrens 28fa9e4066Sahrens #include <sys/spa.h> 29fa9e4066Sahrens #include <sys/dmu.h> 30fa9e4066Sahrens #include <sys/zfs_context.h> 31fa9e4066Sahrens #include <sys/zap.h> 32ea8dc4b6Seschrock #include <sys/refcount.h> 33fa9e4066Sahrens #include <sys/zap_impl.h> 3487e5029aSahrens #include <sys/zap_leaf.h> 35fa9e4066Sahrens #include <sys/avl.h> 36da6c28aaSamw #include <sys/zfs_i18n.h> 37fa9e4066Sahrens 38*ad860c82Sbonwick static int mzap_upgrade(zap_t **zapp, dmu_tx_t *tx); 39fa9e4066Sahrens 40fa9e4066Sahrens 41da6c28aaSamw static uint64_t 42da6c28aaSamw zap_hash(zap_t *zap, const char *normname) 43da6c28aaSamw { 44da6c28aaSamw const uint8_t *cp; 45da6c28aaSamw uint8_t c; 46da6c28aaSamw uint64_t crc = zap->zap_salt; 47da6c28aaSamw 48da6c28aaSamw /* NB: name must already be normalized, if necessary */ 49da6c28aaSamw 50da6c28aaSamw ASSERT(crc != 0); 51da6c28aaSamw ASSERT(zfs_crc64_table[128] == ZFS_CRC64_POLY); 52da6c28aaSamw for (cp = (const uint8_t *)normname; (c = *cp) != '\0'; cp++) { 53da6c28aaSamw crc = (crc >> 8) ^ zfs_crc64_table[(crc ^ c) & 0xFF]; 54da6c28aaSamw } 55da6c28aaSamw 56da6c28aaSamw /* 57da6c28aaSamw * Only use 28 bits, since we need 4 bits in the cookie for the 58da6c28aaSamw * collision differentiator. We MUST use the high bits, since 59da6c28aaSamw * those are the ones that we first pay attention to when 60da6c28aaSamw * chosing the bucket. 61da6c28aaSamw */ 62da6c28aaSamw crc &= ~((1ULL << (64 - ZAP_HASHBITS)) - 1); 63da6c28aaSamw 64da6c28aaSamw return (crc); 65da6c28aaSamw } 66da6c28aaSamw 67da6c28aaSamw static int 68da6c28aaSamw zap_normalize(zap_t *zap, const char *name, char *namenorm) 69da6c28aaSamw { 70da6c28aaSamw size_t inlen, outlen; 71da6c28aaSamw int err; 72da6c28aaSamw 73da6c28aaSamw inlen = strlen(name) + 1; 74da6c28aaSamw outlen = ZAP_MAXNAMELEN; 75da6c28aaSamw 76da6c28aaSamw err = 0; 77da6c28aaSamw (void) u8_textprep_str((char *)name, &inlen, namenorm, &outlen, 78da6c28aaSamw zap->zap_normflags | U8_TEXTPREP_IGNORE_NULL, U8_UNICODE_LATEST, 79da6c28aaSamw &err); 80da6c28aaSamw 81da6c28aaSamw return (err); 82da6c28aaSamw } 83da6c28aaSamw 84da6c28aaSamw boolean_t 85da6c28aaSamw zap_match(zap_name_t *zn, const char *matchname) 86da6c28aaSamw { 87da6c28aaSamw if (zn->zn_matchtype == MT_FIRST) { 88da6c28aaSamw char norm[ZAP_MAXNAMELEN]; 89da6c28aaSamw 90da6c28aaSamw if (zap_normalize(zn->zn_zap, matchname, norm) != 0) 91da6c28aaSamw return (B_FALSE); 92da6c28aaSamw 93da6c28aaSamw return (strcmp(zn->zn_name_norm, norm) == 0); 94da6c28aaSamw } else { 95da6c28aaSamw /* MT_BEST or MT_EXACT */ 96da6c28aaSamw return (strcmp(zn->zn_name_orij, matchname) == 0); 97da6c28aaSamw } 98da6c28aaSamw } 99da6c28aaSamw 100da6c28aaSamw void 101da6c28aaSamw zap_name_free(zap_name_t *zn) 102da6c28aaSamw { 103da6c28aaSamw kmem_free(zn, sizeof (zap_name_t)); 104da6c28aaSamw } 105da6c28aaSamw 106da6c28aaSamw /* XXX combine this with zap_lockdir()? */ 107da6c28aaSamw zap_name_t * 108da6c28aaSamw zap_name_alloc(zap_t *zap, const char *name, matchtype_t mt) 109da6c28aaSamw { 110da6c28aaSamw zap_name_t *zn = kmem_alloc(sizeof (zap_name_t), KM_SLEEP); 111da6c28aaSamw 112da6c28aaSamw zn->zn_zap = zap; 113da6c28aaSamw zn->zn_name_orij = name; 114da6c28aaSamw zn->zn_matchtype = mt; 115da6c28aaSamw if (zap->zap_normflags) { 116da6c28aaSamw if (zap_normalize(zap, name, zn->zn_normbuf) != 0) { 117da6c28aaSamw zap_name_free(zn); 118da6c28aaSamw return (NULL); 119da6c28aaSamw } 120da6c28aaSamw zn->zn_name_norm = zn->zn_normbuf; 121da6c28aaSamw } else { 122da6c28aaSamw if (mt != MT_EXACT) { 123da6c28aaSamw zap_name_free(zn); 124da6c28aaSamw return (NULL); 125da6c28aaSamw } 126da6c28aaSamw zn->zn_name_norm = zn->zn_name_orij; 127da6c28aaSamw } 128da6c28aaSamw 129da6c28aaSamw zn->zn_hash = zap_hash(zap, zn->zn_name_norm); 130da6c28aaSamw return (zn); 131da6c28aaSamw } 132da6c28aaSamw 133fa9e4066Sahrens static void 134fa9e4066Sahrens mzap_byteswap(mzap_phys_t *buf, size_t size) 135fa9e4066Sahrens { 136fa9e4066Sahrens int i, max; 137fa9e4066Sahrens buf->mz_block_type = BSWAP_64(buf->mz_block_type); 138fa9e4066Sahrens buf->mz_salt = BSWAP_64(buf->mz_salt); 139fa9e4066Sahrens max = (size / MZAP_ENT_LEN) - 1; 140fa9e4066Sahrens for (i = 0; i < max; i++) { 141fa9e4066Sahrens buf->mz_chunk[i].mze_value = 142fa9e4066Sahrens BSWAP_64(buf->mz_chunk[i].mze_value); 143fa9e4066Sahrens buf->mz_chunk[i].mze_cd = 144fa9e4066Sahrens BSWAP_32(buf->mz_chunk[i].mze_cd); 145fa9e4066Sahrens } 146fa9e4066Sahrens } 147fa9e4066Sahrens 148fa9e4066Sahrens void 149fa9e4066Sahrens zap_byteswap(void *buf, size_t size) 150fa9e4066Sahrens { 151fa9e4066Sahrens uint64_t block_type; 152fa9e4066Sahrens 153fa9e4066Sahrens block_type = *(uint64_t *)buf; 154fa9e4066Sahrens 1555ad82045Snd if (block_type == ZBT_MICRO || block_type == BSWAP_64(ZBT_MICRO)) { 156fa9e4066Sahrens /* ASSERT(magic == ZAP_LEAF_MAGIC); */ 157fa9e4066Sahrens mzap_byteswap(buf, size); 1585ad82045Snd } else { 159fa9e4066Sahrens fzap_byteswap(buf, size); 160fa9e4066Sahrens } 161fa9e4066Sahrens } 162fa9e4066Sahrens 163fa9e4066Sahrens static int 164fa9e4066Sahrens mze_compare(const void *arg1, const void *arg2) 165fa9e4066Sahrens { 166fa9e4066Sahrens const mzap_ent_t *mze1 = arg1; 167fa9e4066Sahrens const mzap_ent_t *mze2 = arg2; 168fa9e4066Sahrens 169fa9e4066Sahrens if (mze1->mze_hash > mze2->mze_hash) 170fa9e4066Sahrens return (+1); 171fa9e4066Sahrens if (mze1->mze_hash < mze2->mze_hash) 172fa9e4066Sahrens return (-1); 173fa9e4066Sahrens if (mze1->mze_phys.mze_cd > mze2->mze_phys.mze_cd) 174fa9e4066Sahrens return (+1); 175fa9e4066Sahrens if (mze1->mze_phys.mze_cd < mze2->mze_phys.mze_cd) 176fa9e4066Sahrens return (-1); 177fa9e4066Sahrens return (0); 178fa9e4066Sahrens } 179fa9e4066Sahrens 180fa9e4066Sahrens static void 181fa9e4066Sahrens mze_insert(zap_t *zap, int chunkid, uint64_t hash, mzap_ent_phys_t *mzep) 182fa9e4066Sahrens { 183fa9e4066Sahrens mzap_ent_t *mze; 184fa9e4066Sahrens 185fa9e4066Sahrens ASSERT(zap->zap_ismicro); 186fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 187fa9e4066Sahrens ASSERT(mzep->mze_cd < ZAP_MAXCD); 188fa9e4066Sahrens 189fa9e4066Sahrens mze = kmem_alloc(sizeof (mzap_ent_t), KM_SLEEP); 190fa9e4066Sahrens mze->mze_chunkid = chunkid; 191fa9e4066Sahrens mze->mze_hash = hash; 192fa9e4066Sahrens mze->mze_phys = *mzep; 193fa9e4066Sahrens avl_add(&zap->zap_m.zap_avl, mze); 194fa9e4066Sahrens } 195fa9e4066Sahrens 196fa9e4066Sahrens static mzap_ent_t * 197da6c28aaSamw mze_find(zap_name_t *zn) 198fa9e4066Sahrens { 199fa9e4066Sahrens mzap_ent_t mze_tofind; 200fa9e4066Sahrens mzap_ent_t *mze; 201fa9e4066Sahrens avl_index_t idx; 202da6c28aaSamw avl_tree_t *avl = &zn->zn_zap->zap_m.zap_avl; 203fa9e4066Sahrens 204da6c28aaSamw ASSERT(zn->zn_zap->zap_ismicro); 205da6c28aaSamw ASSERT(RW_LOCK_HELD(&zn->zn_zap->zap_rwlock)); 206fa9e4066Sahrens 207da6c28aaSamw if (strlen(zn->zn_name_norm) >= sizeof (mze_tofind.mze_phys.mze_name)) 208fa9e4066Sahrens return (NULL); 209fa9e4066Sahrens 210da6c28aaSamw mze_tofind.mze_hash = zn->zn_hash; 211fa9e4066Sahrens mze_tofind.mze_phys.mze_cd = 0; 212fa9e4066Sahrens 213da6c28aaSamw again: 214fa9e4066Sahrens mze = avl_find(avl, &mze_tofind, &idx); 215fa9e4066Sahrens if (mze == NULL) 216fa9e4066Sahrens mze = avl_nearest(avl, idx, AVL_AFTER); 217da6c28aaSamw for (; mze && mze->mze_hash == zn->zn_hash; mze = AVL_NEXT(avl, mze)) { 218da6c28aaSamw if (zap_match(zn, mze->mze_phys.mze_name)) 219fa9e4066Sahrens return (mze); 220fa9e4066Sahrens } 221da6c28aaSamw if (zn->zn_matchtype == MT_BEST) { 222da6c28aaSamw zn->zn_matchtype = MT_FIRST; 223da6c28aaSamw goto again; 224da6c28aaSamw } 225fa9e4066Sahrens return (NULL); 226fa9e4066Sahrens } 227fa9e4066Sahrens 228fa9e4066Sahrens static uint32_t 229fa9e4066Sahrens mze_find_unused_cd(zap_t *zap, uint64_t hash) 230fa9e4066Sahrens { 231fa9e4066Sahrens mzap_ent_t mze_tofind; 232fa9e4066Sahrens mzap_ent_t *mze; 233fa9e4066Sahrens avl_index_t idx; 234fa9e4066Sahrens avl_tree_t *avl = &zap->zap_m.zap_avl; 235fa9e4066Sahrens uint32_t cd; 236fa9e4066Sahrens 237fa9e4066Sahrens ASSERT(zap->zap_ismicro); 238fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 239fa9e4066Sahrens 240fa9e4066Sahrens mze_tofind.mze_hash = hash; 241fa9e4066Sahrens mze_tofind.mze_phys.mze_cd = 0; 242fa9e4066Sahrens 243fa9e4066Sahrens cd = 0; 244fa9e4066Sahrens for (mze = avl_find(avl, &mze_tofind, &idx); 245fa9e4066Sahrens mze && mze->mze_hash == hash; mze = AVL_NEXT(avl, mze)) { 246fa9e4066Sahrens if (mze->mze_phys.mze_cd != cd) 247fa9e4066Sahrens break; 248fa9e4066Sahrens cd++; 249fa9e4066Sahrens } 250fa9e4066Sahrens 251fa9e4066Sahrens return (cd); 252fa9e4066Sahrens } 253fa9e4066Sahrens 254fa9e4066Sahrens static void 255fa9e4066Sahrens mze_remove(zap_t *zap, mzap_ent_t *mze) 256fa9e4066Sahrens { 257fa9e4066Sahrens ASSERT(zap->zap_ismicro); 258fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 259fa9e4066Sahrens 260fa9e4066Sahrens avl_remove(&zap->zap_m.zap_avl, mze); 261fa9e4066Sahrens kmem_free(mze, sizeof (mzap_ent_t)); 262fa9e4066Sahrens } 263fa9e4066Sahrens 264fa9e4066Sahrens static void 265fa9e4066Sahrens mze_destroy(zap_t *zap) 266fa9e4066Sahrens { 267fa9e4066Sahrens mzap_ent_t *mze; 268fa9e4066Sahrens void *avlcookie = NULL; 269fa9e4066Sahrens 270fa9e4066Sahrens while (mze = avl_destroy_nodes(&zap->zap_m.zap_avl, &avlcookie)) 271fa9e4066Sahrens kmem_free(mze, sizeof (mzap_ent_t)); 272fa9e4066Sahrens avl_destroy(&zap->zap_m.zap_avl); 273fa9e4066Sahrens } 274fa9e4066Sahrens 275fa9e4066Sahrens static zap_t * 276fa9e4066Sahrens mzap_open(objset_t *os, uint64_t obj, dmu_buf_t *db) 277fa9e4066Sahrens { 278fa9e4066Sahrens zap_t *winner; 279fa9e4066Sahrens zap_t *zap; 280fa9e4066Sahrens int i; 281fa9e4066Sahrens 282fa9e4066Sahrens ASSERT3U(MZAP_ENT_LEN, ==, sizeof (mzap_ent_phys_t)); 283fa9e4066Sahrens 284fa9e4066Sahrens zap = kmem_zalloc(sizeof (zap_t), KM_SLEEP); 285fa9e4066Sahrens rw_init(&zap->zap_rwlock, 0, 0, 0); 286fa9e4066Sahrens rw_enter(&zap->zap_rwlock, RW_WRITER); 287fa9e4066Sahrens zap->zap_objset = os; 288fa9e4066Sahrens zap->zap_object = obj; 289fa9e4066Sahrens zap->zap_dbuf = db; 290fa9e4066Sahrens 291da6c28aaSamw if (*(uint64_t *)db->db_data != ZBT_MICRO) { 292fa9e4066Sahrens mutex_init(&zap->zap_f.zap_num_entries_mtx, 0, 0, 0); 293f65e61c0Sahrens zap->zap_f.zap_block_shift = highbit(db->db_size) - 1; 294fa9e4066Sahrens } else { 295fa9e4066Sahrens zap->zap_ismicro = TRUE; 296fa9e4066Sahrens } 297fa9e4066Sahrens 298fa9e4066Sahrens /* 299fa9e4066Sahrens * Make sure that zap_ismicro is set before we let others see 300fa9e4066Sahrens * it, because zap_lockdir() checks zap_ismicro without the lock 301fa9e4066Sahrens * held. 302fa9e4066Sahrens */ 303455d5089Sahrens winner = dmu_buf_set_user(db, zap, &zap->zap_m.zap_phys, zap_evict); 304fa9e4066Sahrens 305fa9e4066Sahrens if (winner != NULL) { 306c25056deSgw rw_exit(&zap->zap_rwlock); 307c25056deSgw rw_destroy(&zap->zap_rwlock); 308c25056deSgw if (!zap->zap_ismicro) 309c25056deSgw mutex_destroy(&zap->zap_f.zap_num_entries_mtx); 310fa9e4066Sahrens kmem_free(zap, sizeof (zap_t)); 311fa9e4066Sahrens return (winner); 312fa9e4066Sahrens } 313fa9e4066Sahrens 314fa9e4066Sahrens if (zap->zap_ismicro) { 315fa9e4066Sahrens zap->zap_salt = zap->zap_m.zap_phys->mz_salt; 316da6c28aaSamw zap->zap_normflags = zap->zap_m.zap_phys->mz_normflags; 317fa9e4066Sahrens zap->zap_m.zap_num_chunks = db->db_size / MZAP_ENT_LEN - 1; 318fa9e4066Sahrens avl_create(&zap->zap_m.zap_avl, mze_compare, 319fa9e4066Sahrens sizeof (mzap_ent_t), offsetof(mzap_ent_t, mze_node)); 320fa9e4066Sahrens 321fa9e4066Sahrens for (i = 0; i < zap->zap_m.zap_num_chunks; i++) { 322fa9e4066Sahrens mzap_ent_phys_t *mze = 323fa9e4066Sahrens &zap->zap_m.zap_phys->mz_chunk[i]; 324fa9e4066Sahrens if (mze->mze_name[0]) { 325da6c28aaSamw zap_name_t *zn; 326da6c28aaSamw 327fa9e4066Sahrens zap->zap_m.zap_num_entries++; 328da6c28aaSamw zn = zap_name_alloc(zap, mze->mze_name, 329da6c28aaSamw MT_EXACT); 330da6c28aaSamw mze_insert(zap, i, zn->zn_hash, mze); 331da6c28aaSamw zap_name_free(zn); 332fa9e4066Sahrens } 333fa9e4066Sahrens } 334fa9e4066Sahrens } else { 335fa9e4066Sahrens zap->zap_salt = zap->zap_f.zap_phys->zap_salt; 336da6c28aaSamw zap->zap_normflags = zap->zap_f.zap_phys->zap_normflags; 337f65e61c0Sahrens 338f65e61c0Sahrens ASSERT3U(sizeof (struct zap_leaf_header), ==, 339f65e61c0Sahrens 2*ZAP_LEAF_CHUNKSIZE); 340f65e61c0Sahrens 341f65e61c0Sahrens /* 342f65e61c0Sahrens * The embedded pointer table should not overlap the 343f65e61c0Sahrens * other members. 344f65e61c0Sahrens */ 345f65e61c0Sahrens ASSERT3P(&ZAP_EMBEDDED_PTRTBL_ENT(zap, 0), >, 346f65e61c0Sahrens &zap->zap_f.zap_phys->zap_salt); 347f65e61c0Sahrens 348f65e61c0Sahrens /* 349f65e61c0Sahrens * The embedded pointer table should end at the end of 350f65e61c0Sahrens * the block 351f65e61c0Sahrens */ 352f65e61c0Sahrens ASSERT3U((uintptr_t)&ZAP_EMBEDDED_PTRTBL_ENT(zap, 353f65e61c0Sahrens 1<<ZAP_EMBEDDED_PTRTBL_SHIFT(zap)) - 354f65e61c0Sahrens (uintptr_t)zap->zap_f.zap_phys, ==, 355f65e61c0Sahrens zap->zap_dbuf->db_size); 356fa9e4066Sahrens } 357fa9e4066Sahrens rw_exit(&zap->zap_rwlock); 358fa9e4066Sahrens return (zap); 359fa9e4066Sahrens } 360fa9e4066Sahrens 361fa9e4066Sahrens int 362fa9e4066Sahrens zap_lockdir(objset_t *os, uint64_t obj, dmu_tx_t *tx, 363c5f9e431Sahrens krw_t lti, boolean_t fatreader, boolean_t adding, zap_t **zapp) 364fa9e4066Sahrens { 365fa9e4066Sahrens zap_t *zap; 366fa9e4066Sahrens dmu_buf_t *db; 367fa9e4066Sahrens krw_t lt; 368fa9e4066Sahrens int err; 369fa9e4066Sahrens 370fa9e4066Sahrens *zapp = NULL; 371fa9e4066Sahrens 372ea8dc4b6Seschrock err = dmu_buf_hold(os, obj, 0, NULL, &db); 373ea8dc4b6Seschrock if (err) 374ea8dc4b6Seschrock return (err); 375fa9e4066Sahrens 376fa9e4066Sahrens #ifdef ZFS_DEBUG 377fa9e4066Sahrens { 378fa9e4066Sahrens dmu_object_info_t doi; 379fa9e4066Sahrens dmu_object_info_from_db(db, &doi); 380fa9e4066Sahrens ASSERT(dmu_ot[doi.doi_type].ot_byteswap == zap_byteswap); 381fa9e4066Sahrens } 382fa9e4066Sahrens #endif 383fa9e4066Sahrens 384fa9e4066Sahrens zap = dmu_buf_get_user(db); 385fa9e4066Sahrens if (zap == NULL) 386fa9e4066Sahrens zap = mzap_open(os, obj, db); 387fa9e4066Sahrens 388fa9e4066Sahrens /* 389fa9e4066Sahrens * We're checking zap_ismicro without the lock held, in order to 390fa9e4066Sahrens * tell what type of lock we want. Once we have some sort of 391fa9e4066Sahrens * lock, see if it really is the right type. In practice this 392fa9e4066Sahrens * can only be different if it was upgraded from micro to fat, 393fa9e4066Sahrens * and micro wanted WRITER but fat only needs READER. 394fa9e4066Sahrens */ 395fa9e4066Sahrens lt = (!zap->zap_ismicro && fatreader) ? RW_READER : lti; 396fa9e4066Sahrens rw_enter(&zap->zap_rwlock, lt); 397fa9e4066Sahrens if (lt != ((!zap->zap_ismicro && fatreader) ? RW_READER : lti)) { 398fa9e4066Sahrens /* it was upgraded, now we only need reader */ 399fa9e4066Sahrens ASSERT(lt == RW_WRITER); 400fa9e4066Sahrens ASSERT(RW_READER == 401fa9e4066Sahrens (!zap->zap_ismicro && fatreader) ? RW_READER : lti); 402fa9e4066Sahrens rw_downgrade(&zap->zap_rwlock); 403fa9e4066Sahrens lt = RW_READER; 404fa9e4066Sahrens } 405fa9e4066Sahrens 406fa9e4066Sahrens zap->zap_objset = os; 407fa9e4066Sahrens 408fa9e4066Sahrens if (lt == RW_WRITER) 409fa9e4066Sahrens dmu_buf_will_dirty(db, tx); 410fa9e4066Sahrens 411fa9e4066Sahrens ASSERT3P(zap->zap_dbuf, ==, db); 412fa9e4066Sahrens 413fa9e4066Sahrens ASSERT(!zap->zap_ismicro || 414fa9e4066Sahrens zap->zap_m.zap_num_entries <= zap->zap_m.zap_num_chunks); 415c5f9e431Sahrens if (zap->zap_ismicro && tx && adding && 416fa9e4066Sahrens zap->zap_m.zap_num_entries == zap->zap_m.zap_num_chunks) { 417fa9e4066Sahrens uint64_t newsz = db->db_size + SPA_MINBLOCKSIZE; 418fa9e4066Sahrens if (newsz > MZAP_MAX_BLKSZ) { 419fa9e4066Sahrens dprintf("upgrading obj %llu: num_entries=%u\n", 420fa9e4066Sahrens obj, zap->zap_m.zap_num_entries); 421fa9e4066Sahrens *zapp = zap; 422*ad860c82Sbonwick return (mzap_upgrade(zapp, tx)); 423fa9e4066Sahrens } 424fa9e4066Sahrens err = dmu_object_set_blocksize(os, obj, newsz, 0, tx); 425fa9e4066Sahrens ASSERT3U(err, ==, 0); 426fa9e4066Sahrens zap->zap_m.zap_num_chunks = 427fa9e4066Sahrens db->db_size / MZAP_ENT_LEN - 1; 428fa9e4066Sahrens } 429fa9e4066Sahrens 430fa9e4066Sahrens *zapp = zap; 431fa9e4066Sahrens return (0); 432fa9e4066Sahrens } 433fa9e4066Sahrens 434fa9e4066Sahrens void 435fa9e4066Sahrens zap_unlockdir(zap_t *zap) 436fa9e4066Sahrens { 437fa9e4066Sahrens rw_exit(&zap->zap_rwlock); 438ea8dc4b6Seschrock dmu_buf_rele(zap->zap_dbuf, NULL); 439fa9e4066Sahrens } 440fa9e4066Sahrens 441*ad860c82Sbonwick static int 442*ad860c82Sbonwick mzap_upgrade(zap_t **zapp, dmu_tx_t *tx) 443fa9e4066Sahrens { 444fa9e4066Sahrens mzap_phys_t *mzp; 445fa9e4066Sahrens int i, sz, nchunks, err; 446*ad860c82Sbonwick zap_t *zap = *zapp; 447fa9e4066Sahrens 448fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 449fa9e4066Sahrens 450fa9e4066Sahrens sz = zap->zap_dbuf->db_size; 451fa9e4066Sahrens mzp = kmem_alloc(sz, KM_SLEEP); 452fa9e4066Sahrens bcopy(zap->zap_dbuf->db_data, mzp, sz); 453fa9e4066Sahrens nchunks = zap->zap_m.zap_num_chunks; 454fa9e4066Sahrens 455fa9e4066Sahrens err = dmu_object_set_blocksize(zap->zap_objset, zap->zap_object, 456f65e61c0Sahrens 1ULL << fzap_default_block_shift, 0, tx); 457*ad860c82Sbonwick if (err) { 458*ad860c82Sbonwick kmem_free(mzp, sz); 459*ad860c82Sbonwick return (err); 460*ad860c82Sbonwick } 461fa9e4066Sahrens 462fa9e4066Sahrens dprintf("upgrading obj=%llu with %u chunks\n", 463fa9e4066Sahrens zap->zap_object, nchunks); 464da6c28aaSamw /* XXX destroy the avl later, so we can use the stored hash value */ 465fa9e4066Sahrens mze_destroy(zap); 466fa9e4066Sahrens 467fa9e4066Sahrens fzap_upgrade(zap, tx); 468fa9e4066Sahrens 469fa9e4066Sahrens for (i = 0; i < nchunks; i++) { 470fa9e4066Sahrens int err; 471fa9e4066Sahrens mzap_ent_phys_t *mze = &mzp->mz_chunk[i]; 472da6c28aaSamw zap_name_t *zn; 473fa9e4066Sahrens if (mze->mze_name[0] == 0) 474fa9e4066Sahrens continue; 475fa9e4066Sahrens dprintf("adding %s=%llu\n", 476fa9e4066Sahrens mze->mze_name, mze->mze_value); 477da6c28aaSamw zn = zap_name_alloc(zap, mze->mze_name, MT_EXACT); 478*ad860c82Sbonwick err = fzap_add_cd(zn, 8, 1, &mze->mze_value, mze->mze_cd, tx); 479*ad860c82Sbonwick zap = zn->zn_zap; /* fzap_add_cd() may change zap */ 480da6c28aaSamw zap_name_free(zn); 481*ad860c82Sbonwick if (err) 482*ad860c82Sbonwick break; 483fa9e4066Sahrens } 484fa9e4066Sahrens kmem_free(mzp, sz); 485*ad860c82Sbonwick *zapp = zap; 486*ad860c82Sbonwick return (err); 487fa9e4066Sahrens } 488fa9e4066Sahrens 489fa9e4066Sahrens static void 490da6c28aaSamw mzap_create_impl(objset_t *os, uint64_t obj, int normflags, dmu_tx_t *tx) 491fa9e4066Sahrens { 492fa9e4066Sahrens dmu_buf_t *db; 493fa9e4066Sahrens mzap_phys_t *zp; 494fa9e4066Sahrens 495da6c28aaSamw ASSERT(normflags == 0 || 496da6c28aaSamw spa_version(dmu_objset_spa(os)) >= SPA_VERSION_NORMALIZATION); 497ea8dc4b6Seschrock VERIFY(0 == dmu_buf_hold(os, obj, 0, FTAG, &db)); 498fa9e4066Sahrens 499fa9e4066Sahrens #ifdef ZFS_DEBUG 500fa9e4066Sahrens { 501fa9e4066Sahrens dmu_object_info_t doi; 502fa9e4066Sahrens dmu_object_info_from_db(db, &doi); 503fa9e4066Sahrens ASSERT(dmu_ot[doi.doi_type].ot_byteswap == zap_byteswap); 504fa9e4066Sahrens } 505fa9e4066Sahrens #endif 506fa9e4066Sahrens 507fa9e4066Sahrens dmu_buf_will_dirty(db, tx); 508fa9e4066Sahrens zp = db->db_data; 509fa9e4066Sahrens zp->mz_block_type = ZBT_MICRO; 510fa9e4066Sahrens zp->mz_salt = ((uintptr_t)db ^ (uintptr_t)tx ^ (obj << 1)) | 1ULL; 511da6c28aaSamw zp->mz_normflags = normflags; 512ea8dc4b6Seschrock dmu_buf_rele(db, FTAG); 513fa9e4066Sahrens } 514fa9e4066Sahrens 515fa9e4066Sahrens int 516fa9e4066Sahrens zap_create_claim(objset_t *os, uint64_t obj, dmu_object_type_t ot, 517fa9e4066Sahrens dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) 518da6c28aaSamw { 519da6c28aaSamw return (zap_create_claim_norm(os, obj, 520da6c28aaSamw 0, ot, bonustype, bonuslen, tx)); 521da6c28aaSamw } 522da6c28aaSamw 523da6c28aaSamw int 524da6c28aaSamw zap_create_claim_norm(objset_t *os, uint64_t obj, int normflags, 525da6c28aaSamw dmu_object_type_t ot, 526da6c28aaSamw dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) 527fa9e4066Sahrens { 528fa9e4066Sahrens int err; 529fa9e4066Sahrens 530fa9e4066Sahrens err = dmu_object_claim(os, obj, ot, 0, bonustype, bonuslen, tx); 531fa9e4066Sahrens if (err != 0) 532fa9e4066Sahrens return (err); 533da6c28aaSamw mzap_create_impl(os, obj, normflags, tx); 534fa9e4066Sahrens return (0); 535fa9e4066Sahrens } 536fa9e4066Sahrens 537fa9e4066Sahrens uint64_t 538fa9e4066Sahrens zap_create(objset_t *os, dmu_object_type_t ot, 539fa9e4066Sahrens dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) 540da6c28aaSamw { 541da6c28aaSamw return (zap_create_norm(os, 0, ot, bonustype, bonuslen, tx)); 542da6c28aaSamw } 543da6c28aaSamw 544da6c28aaSamw uint64_t 545da6c28aaSamw zap_create_norm(objset_t *os, int normflags, dmu_object_type_t ot, 546da6c28aaSamw dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) 547fa9e4066Sahrens { 548fa9e4066Sahrens uint64_t obj = dmu_object_alloc(os, ot, 0, bonustype, bonuslen, tx); 549fa9e4066Sahrens 550da6c28aaSamw mzap_create_impl(os, obj, normflags, tx); 551fa9e4066Sahrens return (obj); 552fa9e4066Sahrens } 553fa9e4066Sahrens 554fa9e4066Sahrens int 555fa9e4066Sahrens zap_destroy(objset_t *os, uint64_t zapobj, dmu_tx_t *tx) 556fa9e4066Sahrens { 557fa9e4066Sahrens /* 558fa9e4066Sahrens * dmu_object_free will free the object number and free the 559fa9e4066Sahrens * data. Freeing the data will cause our pageout function to be 560fa9e4066Sahrens * called, which will destroy our data (zap_leaf_t's and zap_t). 561fa9e4066Sahrens */ 562fa9e4066Sahrens 563fa9e4066Sahrens return (dmu_object_free(os, zapobj, tx)); 564fa9e4066Sahrens } 565fa9e4066Sahrens 566fa9e4066Sahrens _NOTE(ARGSUSED(0)) 567fa9e4066Sahrens void 568455d5089Sahrens zap_evict(dmu_buf_t *db, void *vzap) 569fa9e4066Sahrens { 570455d5089Sahrens zap_t *zap = vzap; 571fa9e4066Sahrens 572fa9e4066Sahrens rw_destroy(&zap->zap_rwlock); 573fa9e4066Sahrens 574f65e61c0Sahrens if (zap->zap_ismicro) 575fa9e4066Sahrens mze_destroy(zap); 576c25056deSgw else 577c25056deSgw mutex_destroy(&zap->zap_f.zap_num_entries_mtx); 578fa9e4066Sahrens 579fa9e4066Sahrens kmem_free(zap, sizeof (zap_t)); 580fa9e4066Sahrens } 581fa9e4066Sahrens 582fa9e4066Sahrens int 583fa9e4066Sahrens zap_count(objset_t *os, uint64_t zapobj, uint64_t *count) 584fa9e4066Sahrens { 585fa9e4066Sahrens zap_t *zap; 586fa9e4066Sahrens int err; 587fa9e4066Sahrens 588c5f9e431Sahrens err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); 589fa9e4066Sahrens if (err) 590fa9e4066Sahrens return (err); 591fa9e4066Sahrens if (!zap->zap_ismicro) { 592fa9e4066Sahrens err = fzap_count(zap, count); 593fa9e4066Sahrens } else { 594fa9e4066Sahrens *count = zap->zap_m.zap_num_entries; 595fa9e4066Sahrens } 596fa9e4066Sahrens zap_unlockdir(zap); 597fa9e4066Sahrens return (err); 598fa9e4066Sahrens } 599fa9e4066Sahrens 600fa9e4066Sahrens /* 601da6c28aaSamw * zn may be NULL; if not specified, it will be computed if needed. 602da6c28aaSamw * See also the comment above zap_entry_normalization_conflict(). 603da6c28aaSamw */ 604da6c28aaSamw static boolean_t 605da6c28aaSamw mzap_normalization_conflict(zap_t *zap, zap_name_t *zn, mzap_ent_t *mze) 606da6c28aaSamw { 607da6c28aaSamw mzap_ent_t *other; 608da6c28aaSamw int direction = AVL_BEFORE; 609da6c28aaSamw boolean_t allocdzn = B_FALSE; 610da6c28aaSamw 611da6c28aaSamw if (zap->zap_normflags == 0) 612da6c28aaSamw return (B_FALSE); 613da6c28aaSamw 614da6c28aaSamw again: 615da6c28aaSamw for (other = avl_walk(&zap->zap_m.zap_avl, mze, direction); 616da6c28aaSamw other && other->mze_hash == mze->mze_hash; 617da6c28aaSamw other = avl_walk(&zap->zap_m.zap_avl, other, direction)) { 618da6c28aaSamw 619da6c28aaSamw if (zn == NULL) { 620da6c28aaSamw zn = zap_name_alloc(zap, mze->mze_phys.mze_name, 621da6c28aaSamw MT_FIRST); 622da6c28aaSamw allocdzn = B_TRUE; 623da6c28aaSamw } 624da6c28aaSamw if (zap_match(zn, other->mze_phys.mze_name)) { 625da6c28aaSamw if (allocdzn) 626da6c28aaSamw zap_name_free(zn); 627da6c28aaSamw return (B_TRUE); 628da6c28aaSamw } 629da6c28aaSamw } 630da6c28aaSamw 631da6c28aaSamw if (direction == AVL_BEFORE) { 632da6c28aaSamw direction = AVL_AFTER; 633da6c28aaSamw goto again; 634da6c28aaSamw } 635da6c28aaSamw 636da6c28aaSamw if (allocdzn) 637da6c28aaSamw zap_name_free(zn); 638da6c28aaSamw return (B_FALSE); 639da6c28aaSamw } 640da6c28aaSamw 641da6c28aaSamw /* 642da6c28aaSamw * Routines for manipulating attributes. 643fa9e4066Sahrens */ 644fa9e4066Sahrens 645fa9e4066Sahrens int 646fa9e4066Sahrens zap_lookup(objset_t *os, uint64_t zapobj, const char *name, 647fa9e4066Sahrens uint64_t integer_size, uint64_t num_integers, void *buf) 648da6c28aaSamw { 649da6c28aaSamw return (zap_lookup_norm(os, zapobj, name, integer_size, 650da6c28aaSamw num_integers, buf, MT_EXACT, NULL, 0, NULL)); 651da6c28aaSamw } 652da6c28aaSamw 653da6c28aaSamw int 654da6c28aaSamw zap_lookup_norm(objset_t *os, uint64_t zapobj, const char *name, 655da6c28aaSamw uint64_t integer_size, uint64_t num_integers, void *buf, 656da6c28aaSamw matchtype_t mt, char *realname, int rn_len, 657da6c28aaSamw boolean_t *ncp) 658fa9e4066Sahrens { 659fa9e4066Sahrens zap_t *zap; 660fa9e4066Sahrens int err; 661fa9e4066Sahrens mzap_ent_t *mze; 662da6c28aaSamw zap_name_t *zn; 663fa9e4066Sahrens 664c5f9e431Sahrens err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); 665fa9e4066Sahrens if (err) 666fa9e4066Sahrens return (err); 667da6c28aaSamw zn = zap_name_alloc(zap, name, mt); 668da6c28aaSamw if (zn == NULL) { 669da6c28aaSamw zap_unlockdir(zap); 670da6c28aaSamw return (ENOTSUP); 671da6c28aaSamw } 672da6c28aaSamw 673fa9e4066Sahrens if (!zap->zap_ismicro) { 674da6c28aaSamw err = fzap_lookup(zn, integer_size, num_integers, buf, 675da6c28aaSamw realname, rn_len, ncp); 676fa9e4066Sahrens } else { 677da6c28aaSamw mze = mze_find(zn); 678fa9e4066Sahrens if (mze == NULL) { 679fa9e4066Sahrens err = ENOENT; 680fa9e4066Sahrens } else { 681da6c28aaSamw if (num_integers < 1) { 682fa9e4066Sahrens err = EOVERFLOW; 683da6c28aaSamw } else if (integer_size != 8) { 684fa9e4066Sahrens err = EINVAL; 685da6c28aaSamw } else { 686fa9e4066Sahrens *(uint64_t *)buf = mze->mze_phys.mze_value; 687da6c28aaSamw (void) strlcpy(realname, 688da6c28aaSamw mze->mze_phys.mze_name, rn_len); 689da6c28aaSamw if (ncp) { 690da6c28aaSamw *ncp = mzap_normalization_conflict(zap, 691da6c28aaSamw zn, mze); 692da6c28aaSamw } 693da6c28aaSamw } 694fa9e4066Sahrens } 695fa9e4066Sahrens } 696da6c28aaSamw zap_name_free(zn); 697fa9e4066Sahrens zap_unlockdir(zap); 698fa9e4066Sahrens return (err); 699fa9e4066Sahrens } 700fa9e4066Sahrens 701fa9e4066Sahrens int 702fa9e4066Sahrens zap_length(objset_t *os, uint64_t zapobj, const char *name, 703fa9e4066Sahrens uint64_t *integer_size, uint64_t *num_integers) 704fa9e4066Sahrens { 705fa9e4066Sahrens zap_t *zap; 706fa9e4066Sahrens int err; 707fa9e4066Sahrens mzap_ent_t *mze; 708da6c28aaSamw zap_name_t *zn; 709fa9e4066Sahrens 710c5f9e431Sahrens err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); 711fa9e4066Sahrens if (err) 712fa9e4066Sahrens return (err); 713da6c28aaSamw zn = zap_name_alloc(zap, name, MT_EXACT); 714da6c28aaSamw if (zn == NULL) { 715da6c28aaSamw zap_unlockdir(zap); 716da6c28aaSamw return (ENOTSUP); 717da6c28aaSamw } 718fa9e4066Sahrens if (!zap->zap_ismicro) { 719da6c28aaSamw err = fzap_length(zn, integer_size, num_integers); 720fa9e4066Sahrens } else { 721da6c28aaSamw mze = mze_find(zn); 722fa9e4066Sahrens if (mze == NULL) { 723fa9e4066Sahrens err = ENOENT; 724fa9e4066Sahrens } else { 725fa9e4066Sahrens if (integer_size) 726fa9e4066Sahrens *integer_size = 8; 727fa9e4066Sahrens if (num_integers) 728fa9e4066Sahrens *num_integers = 1; 729fa9e4066Sahrens } 730fa9e4066Sahrens } 731da6c28aaSamw zap_name_free(zn); 732fa9e4066Sahrens zap_unlockdir(zap); 733fa9e4066Sahrens return (err); 734fa9e4066Sahrens } 735fa9e4066Sahrens 736fa9e4066Sahrens static void 737da6c28aaSamw mzap_addent(zap_name_t *zn, uint64_t value) 738fa9e4066Sahrens { 739fa9e4066Sahrens int i; 740da6c28aaSamw zap_t *zap = zn->zn_zap; 741fa9e4066Sahrens int start = zap->zap_m.zap_alloc_next; 742fa9e4066Sahrens uint32_t cd; 743fa9e4066Sahrens 744da6c28aaSamw dprintf("obj=%llu %s=%llu\n", zap->zap_object, 745da6c28aaSamw zn->zn_name_orij, value); 746fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 747fa9e4066Sahrens 748fa9e4066Sahrens #ifdef ZFS_DEBUG 749fa9e4066Sahrens for (i = 0; i < zap->zap_m.zap_num_chunks; i++) { 750fa9e4066Sahrens mzap_ent_phys_t *mze = &zap->zap_m.zap_phys->mz_chunk[i]; 751da6c28aaSamw ASSERT(strcmp(zn->zn_name_orij, mze->mze_name) != 0); 752fa9e4066Sahrens } 753fa9e4066Sahrens #endif 754fa9e4066Sahrens 755da6c28aaSamw cd = mze_find_unused_cd(zap, zn->zn_hash); 756fa9e4066Sahrens /* given the limited size of the microzap, this can't happen */ 757fa9e4066Sahrens ASSERT(cd != ZAP_MAXCD); 758fa9e4066Sahrens 759fa9e4066Sahrens again: 760fa9e4066Sahrens for (i = start; i < zap->zap_m.zap_num_chunks; i++) { 761fa9e4066Sahrens mzap_ent_phys_t *mze = &zap->zap_m.zap_phys->mz_chunk[i]; 762fa9e4066Sahrens if (mze->mze_name[0] == 0) { 763fa9e4066Sahrens mze->mze_value = value; 764fa9e4066Sahrens mze->mze_cd = cd; 765da6c28aaSamw (void) strcpy(mze->mze_name, zn->zn_name_orij); 766fa9e4066Sahrens zap->zap_m.zap_num_entries++; 767fa9e4066Sahrens zap->zap_m.zap_alloc_next = i+1; 768fa9e4066Sahrens if (zap->zap_m.zap_alloc_next == 769fa9e4066Sahrens zap->zap_m.zap_num_chunks) 770fa9e4066Sahrens zap->zap_m.zap_alloc_next = 0; 771da6c28aaSamw mze_insert(zap, i, zn->zn_hash, mze); 772fa9e4066Sahrens return; 773fa9e4066Sahrens } 774fa9e4066Sahrens } 775fa9e4066Sahrens if (start != 0) { 776fa9e4066Sahrens start = 0; 777fa9e4066Sahrens goto again; 778fa9e4066Sahrens } 779fa9e4066Sahrens ASSERT(!"out of entries!"); 780fa9e4066Sahrens } 781fa9e4066Sahrens 782fa9e4066Sahrens int 783fa9e4066Sahrens zap_add(objset_t *os, uint64_t zapobj, const char *name, 784fa9e4066Sahrens int integer_size, uint64_t num_integers, 785fa9e4066Sahrens const void *val, dmu_tx_t *tx) 786fa9e4066Sahrens { 787fa9e4066Sahrens zap_t *zap; 788fa9e4066Sahrens int err; 789fa9e4066Sahrens mzap_ent_t *mze; 790fa9e4066Sahrens const uint64_t *intval = val; 791da6c28aaSamw zap_name_t *zn; 792fa9e4066Sahrens 793c5f9e431Sahrens err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, &zap); 794fa9e4066Sahrens if (err) 795fa9e4066Sahrens return (err); 796da6c28aaSamw zn = zap_name_alloc(zap, name, MT_EXACT); 797da6c28aaSamw if (zn == NULL) { 798da6c28aaSamw zap_unlockdir(zap); 799da6c28aaSamw return (ENOTSUP); 800da6c28aaSamw } 801fa9e4066Sahrens if (!zap->zap_ismicro) { 802da6c28aaSamw err = fzap_add(zn, integer_size, num_integers, val, tx); 803*ad860c82Sbonwick zap = zn->zn_zap; /* fzap_add() may change zap */ 804fa9e4066Sahrens } else if (integer_size != 8 || num_integers != 1 || 805fa9e4066Sahrens strlen(name) >= MZAP_NAME_LEN) { 806fa9e4066Sahrens dprintf("upgrading obj %llu: intsz=%u numint=%llu name=%s\n", 807fa9e4066Sahrens zapobj, integer_size, num_integers, name); 808*ad860c82Sbonwick err = mzap_upgrade(&zn->zn_zap, tx); 809*ad860c82Sbonwick if (err == 0) 810*ad860c82Sbonwick err = fzap_add(zn, integer_size, num_integers, val, tx); 811*ad860c82Sbonwick zap = zn->zn_zap; /* fzap_add() may change zap */ 812fa9e4066Sahrens } else { 813da6c28aaSamw mze = mze_find(zn); 814fa9e4066Sahrens if (mze != NULL) { 815fa9e4066Sahrens err = EEXIST; 816fa9e4066Sahrens } else { 817da6c28aaSamw mzap_addent(zn, *intval); 818fa9e4066Sahrens } 819fa9e4066Sahrens } 820*ad860c82Sbonwick ASSERT(zap == zn->zn_zap); 821da6c28aaSamw zap_name_free(zn); 822*ad860c82Sbonwick if (zap != NULL) /* may be NULL if fzap_add() failed */ 823*ad860c82Sbonwick zap_unlockdir(zap); 824fa9e4066Sahrens return (err); 825fa9e4066Sahrens } 826fa9e4066Sahrens 827fa9e4066Sahrens int 828fa9e4066Sahrens zap_update(objset_t *os, uint64_t zapobj, const char *name, 829fa9e4066Sahrens int integer_size, uint64_t num_integers, const void *val, dmu_tx_t *tx) 830fa9e4066Sahrens { 831fa9e4066Sahrens zap_t *zap; 832fa9e4066Sahrens mzap_ent_t *mze; 833fa9e4066Sahrens const uint64_t *intval = val; 834da6c28aaSamw zap_name_t *zn; 835fa9e4066Sahrens int err; 836fa9e4066Sahrens 837c5f9e431Sahrens err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, &zap); 838fa9e4066Sahrens if (err) 839fa9e4066Sahrens return (err); 840da6c28aaSamw zn = zap_name_alloc(zap, name, MT_EXACT); 841da6c28aaSamw if (zn == NULL) { 842da6c28aaSamw zap_unlockdir(zap); 843da6c28aaSamw return (ENOTSUP); 844da6c28aaSamw } 845fa9e4066Sahrens if (!zap->zap_ismicro) { 846da6c28aaSamw err = fzap_update(zn, integer_size, num_integers, val, tx); 847*ad860c82Sbonwick zap = zn->zn_zap; /* fzap_update() may change zap */ 848fa9e4066Sahrens } else if (integer_size != 8 || num_integers != 1 || 849fa9e4066Sahrens strlen(name) >= MZAP_NAME_LEN) { 850fa9e4066Sahrens dprintf("upgrading obj %llu: intsz=%u numint=%llu name=%s\n", 851fa9e4066Sahrens zapobj, integer_size, num_integers, name); 852*ad860c82Sbonwick err = mzap_upgrade(&zn->zn_zap, tx); 853*ad860c82Sbonwick if (err == 0) 854*ad860c82Sbonwick err = fzap_update(zn, integer_size, num_integers, 855*ad860c82Sbonwick val, tx); 856*ad860c82Sbonwick zap = zn->zn_zap; /* fzap_update() may change zap */ 857fa9e4066Sahrens } else { 858da6c28aaSamw mze = mze_find(zn); 859fa9e4066Sahrens if (mze != NULL) { 860fa9e4066Sahrens mze->mze_phys.mze_value = *intval; 861fa9e4066Sahrens zap->zap_m.zap_phys->mz_chunk 862fa9e4066Sahrens [mze->mze_chunkid].mze_value = *intval; 863fa9e4066Sahrens } else { 864da6c28aaSamw mzap_addent(zn, *intval); 865fa9e4066Sahrens } 866fa9e4066Sahrens } 867*ad860c82Sbonwick ASSERT(zap == zn->zn_zap); 868da6c28aaSamw zap_name_free(zn); 869*ad860c82Sbonwick if (zap != NULL) /* may be NULL if fzap_upgrade() failed */ 870*ad860c82Sbonwick zap_unlockdir(zap); 871455d5089Sahrens return (err); 872fa9e4066Sahrens } 873fa9e4066Sahrens 874fa9e4066Sahrens int 875fa9e4066Sahrens zap_remove(objset_t *os, uint64_t zapobj, const char *name, dmu_tx_t *tx) 876da6c28aaSamw { 877da6c28aaSamw return (zap_remove_norm(os, zapobj, name, MT_EXACT, tx)); 878da6c28aaSamw } 879da6c28aaSamw 880da6c28aaSamw int 881da6c28aaSamw zap_remove_norm(objset_t *os, uint64_t zapobj, const char *name, 882da6c28aaSamw matchtype_t mt, dmu_tx_t *tx) 883fa9e4066Sahrens { 884fa9e4066Sahrens zap_t *zap; 885fa9e4066Sahrens int err; 886fa9e4066Sahrens mzap_ent_t *mze; 887da6c28aaSamw zap_name_t *zn; 888fa9e4066Sahrens 889c5f9e431Sahrens err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, FALSE, &zap); 890fa9e4066Sahrens if (err) 891fa9e4066Sahrens return (err); 892da6c28aaSamw zn = zap_name_alloc(zap, name, mt); 893da6c28aaSamw if (zn == NULL) { 894da6c28aaSamw zap_unlockdir(zap); 895da6c28aaSamw return (ENOTSUP); 896da6c28aaSamw } 897fa9e4066Sahrens if (!zap->zap_ismicro) { 898da6c28aaSamw err = fzap_remove(zn, tx); 899fa9e4066Sahrens } else { 900da6c28aaSamw mze = mze_find(zn); 901fa9e4066Sahrens if (mze == NULL) { 902fa9e4066Sahrens err = ENOENT; 903fa9e4066Sahrens } else { 904fa9e4066Sahrens zap->zap_m.zap_num_entries--; 905fa9e4066Sahrens bzero(&zap->zap_m.zap_phys->mz_chunk[mze->mze_chunkid], 906fa9e4066Sahrens sizeof (mzap_ent_phys_t)); 907fa9e4066Sahrens mze_remove(zap, mze); 908fa9e4066Sahrens } 909fa9e4066Sahrens } 910da6c28aaSamw zap_name_free(zn); 911fa9e4066Sahrens zap_unlockdir(zap); 912fa9e4066Sahrens return (err); 913fa9e4066Sahrens } 914fa9e4066Sahrens 915fa9e4066Sahrens /* 916fa9e4066Sahrens * Routines for iterating over the attributes. 917fa9e4066Sahrens */ 918fa9e4066Sahrens 919fa9e4066Sahrens /* 920fa9e4066Sahrens * We want to keep the high 32 bits of the cursor zero if we can, so 921fa9e4066Sahrens * that 32-bit programs can access this. So use a small hash value so 922fa9e4066Sahrens * we can fit 4 bits of cd into the 32-bit cursor. 923fa9e4066Sahrens * 924fa9e4066Sahrens * [ 4 zero bits | 32-bit collision differentiator | 28-bit hash value ] 925fa9e4066Sahrens */ 926fa9e4066Sahrens void 927fa9e4066Sahrens zap_cursor_init_serialized(zap_cursor_t *zc, objset_t *os, uint64_t zapobj, 928fa9e4066Sahrens uint64_t serialized) 929fa9e4066Sahrens { 930fa9e4066Sahrens zc->zc_objset = os; 93187e5029aSahrens zc->zc_zap = NULL; 93287e5029aSahrens zc->zc_leaf = NULL; 933fa9e4066Sahrens zc->zc_zapobj = zapobj; 934fa9e4066Sahrens if (serialized == -1ULL) { 935fa9e4066Sahrens zc->zc_hash = -1ULL; 936fa9e4066Sahrens zc->zc_cd = 0; 937fa9e4066Sahrens } else { 938fa9e4066Sahrens zc->zc_hash = serialized << (64-ZAP_HASHBITS); 939fa9e4066Sahrens zc->zc_cd = serialized >> ZAP_HASHBITS; 940fa9e4066Sahrens if (zc->zc_cd >= ZAP_MAXCD) /* corrupt serialized */ 941fa9e4066Sahrens zc->zc_cd = 0; 942fa9e4066Sahrens } 943fa9e4066Sahrens } 944fa9e4066Sahrens 94587e5029aSahrens void 94687e5029aSahrens zap_cursor_init(zap_cursor_t *zc, objset_t *os, uint64_t zapobj) 94787e5029aSahrens { 94887e5029aSahrens zap_cursor_init_serialized(zc, os, zapobj, 0); 94987e5029aSahrens } 95087e5029aSahrens 95187e5029aSahrens void 95287e5029aSahrens zap_cursor_fini(zap_cursor_t *zc) 95387e5029aSahrens { 95487e5029aSahrens if (zc->zc_zap) { 95587e5029aSahrens rw_enter(&zc->zc_zap->zap_rwlock, RW_READER); 95687e5029aSahrens zap_unlockdir(zc->zc_zap); 95787e5029aSahrens zc->zc_zap = NULL; 95887e5029aSahrens } 95987e5029aSahrens if (zc->zc_leaf) { 96087e5029aSahrens rw_enter(&zc->zc_leaf->l_rwlock, RW_READER); 96187e5029aSahrens zap_put_leaf(zc->zc_leaf); 96287e5029aSahrens zc->zc_leaf = NULL; 96387e5029aSahrens } 96487e5029aSahrens zc->zc_objset = NULL; 96587e5029aSahrens } 96687e5029aSahrens 967fa9e4066Sahrens uint64_t 968fa9e4066Sahrens zap_cursor_serialize(zap_cursor_t *zc) 969fa9e4066Sahrens { 970fa9e4066Sahrens if (zc->zc_hash == -1ULL) 971fa9e4066Sahrens return (-1ULL); 972fa9e4066Sahrens ASSERT((zc->zc_hash & (ZAP_MAXCD-1)) == 0); 973fa9e4066Sahrens ASSERT(zc->zc_cd < ZAP_MAXCD); 974fa9e4066Sahrens return ((zc->zc_hash >> (64-ZAP_HASHBITS)) | 975fa9e4066Sahrens ((uint64_t)zc->zc_cd << ZAP_HASHBITS)); 976fa9e4066Sahrens } 977fa9e4066Sahrens 978fa9e4066Sahrens int 979fa9e4066Sahrens zap_cursor_retrieve(zap_cursor_t *zc, zap_attribute_t *za) 980fa9e4066Sahrens { 981fa9e4066Sahrens int err; 982fa9e4066Sahrens avl_index_t idx; 983fa9e4066Sahrens mzap_ent_t mze_tofind; 984fa9e4066Sahrens mzap_ent_t *mze; 985fa9e4066Sahrens 986fa9e4066Sahrens if (zc->zc_hash == -1ULL) 987fa9e4066Sahrens return (ENOENT); 988fa9e4066Sahrens 98987e5029aSahrens if (zc->zc_zap == NULL) { 99087e5029aSahrens err = zap_lockdir(zc->zc_objset, zc->zc_zapobj, NULL, 991c5f9e431Sahrens RW_READER, TRUE, FALSE, &zc->zc_zap); 99287e5029aSahrens if (err) 99387e5029aSahrens return (err); 99487e5029aSahrens } else { 99587e5029aSahrens rw_enter(&zc->zc_zap->zap_rwlock, RW_READER); 99687e5029aSahrens } 99787e5029aSahrens if (!zc->zc_zap->zap_ismicro) { 99887e5029aSahrens err = fzap_cursor_retrieve(zc->zc_zap, zc, za); 999fa9e4066Sahrens } else { 1000fa9e4066Sahrens err = ENOENT; 1001fa9e4066Sahrens 1002fa9e4066Sahrens mze_tofind.mze_hash = zc->zc_hash; 1003fa9e4066Sahrens mze_tofind.mze_phys.mze_cd = zc->zc_cd; 1004fa9e4066Sahrens 100587e5029aSahrens mze = avl_find(&zc->zc_zap->zap_m.zap_avl, &mze_tofind, &idx); 100687e5029aSahrens if (mze == NULL) { 100787e5029aSahrens mze = avl_nearest(&zc->zc_zap->zap_m.zap_avl, 100887e5029aSahrens idx, AVL_AFTER); 100987e5029aSahrens } 1010fa9e4066Sahrens if (mze) { 1011da6c28aaSamw ASSERT(0 == bcmp(&mze->mze_phys, 1012da6c28aaSamw &zc->zc_zap->zap_m.zap_phys->mz_chunk 1013da6c28aaSamw [mze->mze_chunkid], sizeof (mze->mze_phys))); 1014da6c28aaSamw 1015da6c28aaSamw za->za_normalization_conflict = 1016da6c28aaSamw mzap_normalization_conflict(zc->zc_zap, NULL, mze); 1017fa9e4066Sahrens za->za_integer_length = 8; 1018fa9e4066Sahrens za->za_num_integers = 1; 1019fa9e4066Sahrens za->za_first_integer = mze->mze_phys.mze_value; 1020fa9e4066Sahrens (void) strcpy(za->za_name, mze->mze_phys.mze_name); 1021fa9e4066Sahrens zc->zc_hash = mze->mze_hash; 1022fa9e4066Sahrens zc->zc_cd = mze->mze_phys.mze_cd; 1023fa9e4066Sahrens err = 0; 1024fa9e4066Sahrens } else { 1025fa9e4066Sahrens zc->zc_hash = -1ULL; 1026fa9e4066Sahrens } 1027fa9e4066Sahrens } 102887e5029aSahrens rw_exit(&zc->zc_zap->zap_rwlock); 1029fa9e4066Sahrens return (err); 1030fa9e4066Sahrens } 1031fa9e4066Sahrens 1032fa9e4066Sahrens void 1033fa9e4066Sahrens zap_cursor_advance(zap_cursor_t *zc) 1034fa9e4066Sahrens { 1035fa9e4066Sahrens if (zc->zc_hash == -1ULL) 1036fa9e4066Sahrens return; 1037fa9e4066Sahrens zc->zc_cd++; 1038fa9e4066Sahrens if (zc->zc_cd >= ZAP_MAXCD) { 1039fa9e4066Sahrens zc->zc_cd = 0; 1040fa9e4066Sahrens zc->zc_hash += 1ULL<<(64-ZAP_HASHBITS); 1041fa9e4066Sahrens if (zc->zc_hash == 0) /* EOF */ 1042fa9e4066Sahrens zc->zc_hash = -1ULL; 1043fa9e4066Sahrens } 1044fa9e4066Sahrens } 1045fa9e4066Sahrens 1046fa9e4066Sahrens int 1047fa9e4066Sahrens zap_get_stats(objset_t *os, uint64_t zapobj, zap_stats_t *zs) 1048fa9e4066Sahrens { 1049fa9e4066Sahrens int err; 1050fa9e4066Sahrens zap_t *zap; 1051fa9e4066Sahrens 1052c5f9e431Sahrens err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); 1053fa9e4066Sahrens if (err) 1054fa9e4066Sahrens return (err); 1055fa9e4066Sahrens 1056fa9e4066Sahrens bzero(zs, sizeof (zap_stats_t)); 1057fa9e4066Sahrens 1058fa9e4066Sahrens if (zap->zap_ismicro) { 1059fa9e4066Sahrens zs->zs_blocksize = zap->zap_dbuf->db_size; 1060fa9e4066Sahrens zs->zs_num_entries = zap->zap_m.zap_num_entries; 1061fa9e4066Sahrens zs->zs_num_blocks = 1; 1062fa9e4066Sahrens } else { 1063fa9e4066Sahrens fzap_get_stats(zap, zs); 1064fa9e4066Sahrens } 1065fa9e4066Sahrens zap_unlockdir(zap); 1066fa9e4066Sahrens return (0); 1067fa9e4066Sahrens } 1068