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 /* 22*ab04eb8eStimh * Copyright 2008 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> 36de8267e0Stimh 37de8267e0Stimh #ifdef _KERNEL 38de8267e0Stimh #include <sys/sunddi.h> 39de8267e0Stimh #endif 40fa9e4066Sahrens 41ad860c82Sbonwick static int mzap_upgrade(zap_t **zapp, dmu_tx_t *tx); 42fa9e4066Sahrens 43fa9e4066Sahrens 44da6c28aaSamw static uint64_t 45da6c28aaSamw zap_hash(zap_t *zap, const char *normname) 46da6c28aaSamw { 47da6c28aaSamw const uint8_t *cp; 48da6c28aaSamw uint8_t c; 49da6c28aaSamw uint64_t crc = zap->zap_salt; 50da6c28aaSamw 51da6c28aaSamw /* NB: name must already be normalized, if necessary */ 52da6c28aaSamw 53da6c28aaSamw ASSERT(crc != 0); 54da6c28aaSamw ASSERT(zfs_crc64_table[128] == ZFS_CRC64_POLY); 55da6c28aaSamw for (cp = (const uint8_t *)normname; (c = *cp) != '\0'; cp++) { 56da6c28aaSamw crc = (crc >> 8) ^ zfs_crc64_table[(crc ^ c) & 0xFF]; 57da6c28aaSamw } 58da6c28aaSamw 59da6c28aaSamw /* 60da6c28aaSamw * Only use 28 bits, since we need 4 bits in the cookie for the 61da6c28aaSamw * collision differentiator. We MUST use the high bits, since 62da6c28aaSamw * those are the ones that we first pay attention to when 63da6c28aaSamw * chosing the bucket. 64da6c28aaSamw */ 65da6c28aaSamw crc &= ~((1ULL << (64 - ZAP_HASHBITS)) - 1); 66da6c28aaSamw 67da6c28aaSamw return (crc); 68da6c28aaSamw } 69da6c28aaSamw 70da6c28aaSamw static int 71da6c28aaSamw zap_normalize(zap_t *zap, const char *name, char *namenorm) 72da6c28aaSamw { 73da6c28aaSamw size_t inlen, outlen; 74da6c28aaSamw int err; 75da6c28aaSamw 76da6c28aaSamw inlen = strlen(name) + 1; 77da6c28aaSamw outlen = ZAP_MAXNAMELEN; 78da6c28aaSamw 79da6c28aaSamw err = 0; 80da6c28aaSamw (void) u8_textprep_str((char *)name, &inlen, namenorm, &outlen, 81da6c28aaSamw zap->zap_normflags | U8_TEXTPREP_IGNORE_NULL, U8_UNICODE_LATEST, 82da6c28aaSamw &err); 83da6c28aaSamw 84da6c28aaSamw return (err); 85da6c28aaSamw } 86da6c28aaSamw 87da6c28aaSamw boolean_t 88da6c28aaSamw zap_match(zap_name_t *zn, const char *matchname) 89da6c28aaSamw { 90da6c28aaSamw if (zn->zn_matchtype == MT_FIRST) { 91da6c28aaSamw char norm[ZAP_MAXNAMELEN]; 92da6c28aaSamw 93da6c28aaSamw if (zap_normalize(zn->zn_zap, matchname, norm) != 0) 94da6c28aaSamw return (B_FALSE); 95da6c28aaSamw 96da6c28aaSamw return (strcmp(zn->zn_name_norm, norm) == 0); 97da6c28aaSamw } else { 98da6c28aaSamw /* MT_BEST or MT_EXACT */ 99da6c28aaSamw return (strcmp(zn->zn_name_orij, matchname) == 0); 100da6c28aaSamw } 101da6c28aaSamw } 102da6c28aaSamw 103da6c28aaSamw void 104da6c28aaSamw zap_name_free(zap_name_t *zn) 105da6c28aaSamw { 106da6c28aaSamw kmem_free(zn, sizeof (zap_name_t)); 107da6c28aaSamw } 108da6c28aaSamw 109da6c28aaSamw /* XXX combine this with zap_lockdir()? */ 110da6c28aaSamw zap_name_t * 111da6c28aaSamw zap_name_alloc(zap_t *zap, const char *name, matchtype_t mt) 112da6c28aaSamw { 113da6c28aaSamw zap_name_t *zn = kmem_alloc(sizeof (zap_name_t), KM_SLEEP); 114da6c28aaSamw 115da6c28aaSamw zn->zn_zap = zap; 116da6c28aaSamw zn->zn_name_orij = name; 117da6c28aaSamw zn->zn_matchtype = mt; 118da6c28aaSamw if (zap->zap_normflags) { 119da6c28aaSamw if (zap_normalize(zap, name, zn->zn_normbuf) != 0) { 120da6c28aaSamw zap_name_free(zn); 121da6c28aaSamw return (NULL); 122da6c28aaSamw } 123da6c28aaSamw zn->zn_name_norm = zn->zn_normbuf; 124da6c28aaSamw } else { 125da6c28aaSamw if (mt != MT_EXACT) { 126da6c28aaSamw zap_name_free(zn); 127da6c28aaSamw return (NULL); 128da6c28aaSamw } 129da6c28aaSamw zn->zn_name_norm = zn->zn_name_orij; 130da6c28aaSamw } 131da6c28aaSamw 132da6c28aaSamw zn->zn_hash = zap_hash(zap, zn->zn_name_norm); 133da6c28aaSamw return (zn); 134da6c28aaSamw } 135da6c28aaSamw 136fa9e4066Sahrens static void 137fa9e4066Sahrens mzap_byteswap(mzap_phys_t *buf, size_t size) 138fa9e4066Sahrens { 139fa9e4066Sahrens int i, max; 140fa9e4066Sahrens buf->mz_block_type = BSWAP_64(buf->mz_block_type); 141fa9e4066Sahrens buf->mz_salt = BSWAP_64(buf->mz_salt); 142*ab04eb8eStimh buf->mz_normflags = BSWAP_64(buf->mz_normflags); 143fa9e4066Sahrens max = (size / MZAP_ENT_LEN) - 1; 144fa9e4066Sahrens for (i = 0; i < max; i++) { 145fa9e4066Sahrens buf->mz_chunk[i].mze_value = 146fa9e4066Sahrens BSWAP_64(buf->mz_chunk[i].mze_value); 147fa9e4066Sahrens buf->mz_chunk[i].mze_cd = 148fa9e4066Sahrens BSWAP_32(buf->mz_chunk[i].mze_cd); 149fa9e4066Sahrens } 150fa9e4066Sahrens } 151fa9e4066Sahrens 152fa9e4066Sahrens void 153fa9e4066Sahrens zap_byteswap(void *buf, size_t size) 154fa9e4066Sahrens { 155fa9e4066Sahrens uint64_t block_type; 156fa9e4066Sahrens 157fa9e4066Sahrens block_type = *(uint64_t *)buf; 158fa9e4066Sahrens 1595ad82045Snd if (block_type == ZBT_MICRO || block_type == BSWAP_64(ZBT_MICRO)) { 160fa9e4066Sahrens /* ASSERT(magic == ZAP_LEAF_MAGIC); */ 161fa9e4066Sahrens mzap_byteswap(buf, size); 1625ad82045Snd } else { 163fa9e4066Sahrens fzap_byteswap(buf, size); 164fa9e4066Sahrens } 165fa9e4066Sahrens } 166fa9e4066Sahrens 167fa9e4066Sahrens static int 168fa9e4066Sahrens mze_compare(const void *arg1, const void *arg2) 169fa9e4066Sahrens { 170fa9e4066Sahrens const mzap_ent_t *mze1 = arg1; 171fa9e4066Sahrens const mzap_ent_t *mze2 = arg2; 172fa9e4066Sahrens 173fa9e4066Sahrens if (mze1->mze_hash > mze2->mze_hash) 174fa9e4066Sahrens return (+1); 175fa9e4066Sahrens if (mze1->mze_hash < mze2->mze_hash) 176fa9e4066Sahrens return (-1); 177fa9e4066Sahrens if (mze1->mze_phys.mze_cd > mze2->mze_phys.mze_cd) 178fa9e4066Sahrens return (+1); 179fa9e4066Sahrens if (mze1->mze_phys.mze_cd < mze2->mze_phys.mze_cd) 180fa9e4066Sahrens return (-1); 181fa9e4066Sahrens return (0); 182fa9e4066Sahrens } 183fa9e4066Sahrens 184fa9e4066Sahrens static void 185fa9e4066Sahrens mze_insert(zap_t *zap, int chunkid, uint64_t hash, mzap_ent_phys_t *mzep) 186fa9e4066Sahrens { 187fa9e4066Sahrens mzap_ent_t *mze; 188fa9e4066Sahrens 189fa9e4066Sahrens ASSERT(zap->zap_ismicro); 190fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 191fa9e4066Sahrens ASSERT(mzep->mze_cd < ZAP_MAXCD); 192fa9e4066Sahrens 193fa9e4066Sahrens mze = kmem_alloc(sizeof (mzap_ent_t), KM_SLEEP); 194fa9e4066Sahrens mze->mze_chunkid = chunkid; 195fa9e4066Sahrens mze->mze_hash = hash; 196fa9e4066Sahrens mze->mze_phys = *mzep; 197fa9e4066Sahrens avl_add(&zap->zap_m.zap_avl, mze); 198fa9e4066Sahrens } 199fa9e4066Sahrens 200fa9e4066Sahrens static mzap_ent_t * 201da6c28aaSamw mze_find(zap_name_t *zn) 202fa9e4066Sahrens { 203fa9e4066Sahrens mzap_ent_t mze_tofind; 204fa9e4066Sahrens mzap_ent_t *mze; 205fa9e4066Sahrens avl_index_t idx; 206da6c28aaSamw avl_tree_t *avl = &zn->zn_zap->zap_m.zap_avl; 207fa9e4066Sahrens 208da6c28aaSamw ASSERT(zn->zn_zap->zap_ismicro); 209da6c28aaSamw ASSERT(RW_LOCK_HELD(&zn->zn_zap->zap_rwlock)); 210fa9e4066Sahrens 211da6c28aaSamw if (strlen(zn->zn_name_norm) >= sizeof (mze_tofind.mze_phys.mze_name)) 212fa9e4066Sahrens return (NULL); 213fa9e4066Sahrens 214da6c28aaSamw mze_tofind.mze_hash = zn->zn_hash; 215fa9e4066Sahrens mze_tofind.mze_phys.mze_cd = 0; 216fa9e4066Sahrens 217da6c28aaSamw again: 218fa9e4066Sahrens mze = avl_find(avl, &mze_tofind, &idx); 219fa9e4066Sahrens if (mze == NULL) 220fa9e4066Sahrens mze = avl_nearest(avl, idx, AVL_AFTER); 221da6c28aaSamw for (; mze && mze->mze_hash == zn->zn_hash; mze = AVL_NEXT(avl, mze)) { 222da6c28aaSamw if (zap_match(zn, mze->mze_phys.mze_name)) 223fa9e4066Sahrens return (mze); 224fa9e4066Sahrens } 225da6c28aaSamw if (zn->zn_matchtype == MT_BEST) { 226da6c28aaSamw zn->zn_matchtype = MT_FIRST; 227da6c28aaSamw goto again; 228da6c28aaSamw } 229fa9e4066Sahrens return (NULL); 230fa9e4066Sahrens } 231fa9e4066Sahrens 232fa9e4066Sahrens static uint32_t 233fa9e4066Sahrens mze_find_unused_cd(zap_t *zap, uint64_t hash) 234fa9e4066Sahrens { 235fa9e4066Sahrens mzap_ent_t mze_tofind; 236fa9e4066Sahrens mzap_ent_t *mze; 237fa9e4066Sahrens avl_index_t idx; 238fa9e4066Sahrens avl_tree_t *avl = &zap->zap_m.zap_avl; 239fa9e4066Sahrens uint32_t cd; 240fa9e4066Sahrens 241fa9e4066Sahrens ASSERT(zap->zap_ismicro); 242fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 243fa9e4066Sahrens 244fa9e4066Sahrens mze_tofind.mze_hash = hash; 245fa9e4066Sahrens mze_tofind.mze_phys.mze_cd = 0; 246fa9e4066Sahrens 247fa9e4066Sahrens cd = 0; 248fa9e4066Sahrens for (mze = avl_find(avl, &mze_tofind, &idx); 249fa9e4066Sahrens mze && mze->mze_hash == hash; mze = AVL_NEXT(avl, mze)) { 250fa9e4066Sahrens if (mze->mze_phys.mze_cd != cd) 251fa9e4066Sahrens break; 252fa9e4066Sahrens cd++; 253fa9e4066Sahrens } 254fa9e4066Sahrens 255fa9e4066Sahrens return (cd); 256fa9e4066Sahrens } 257fa9e4066Sahrens 258fa9e4066Sahrens static void 259fa9e4066Sahrens mze_remove(zap_t *zap, mzap_ent_t *mze) 260fa9e4066Sahrens { 261fa9e4066Sahrens ASSERT(zap->zap_ismicro); 262fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 263fa9e4066Sahrens 264fa9e4066Sahrens avl_remove(&zap->zap_m.zap_avl, mze); 265fa9e4066Sahrens kmem_free(mze, sizeof (mzap_ent_t)); 266fa9e4066Sahrens } 267fa9e4066Sahrens 268fa9e4066Sahrens static void 269fa9e4066Sahrens mze_destroy(zap_t *zap) 270fa9e4066Sahrens { 271fa9e4066Sahrens mzap_ent_t *mze; 272fa9e4066Sahrens void *avlcookie = NULL; 273fa9e4066Sahrens 274fa9e4066Sahrens while (mze = avl_destroy_nodes(&zap->zap_m.zap_avl, &avlcookie)) 275fa9e4066Sahrens kmem_free(mze, sizeof (mzap_ent_t)); 276fa9e4066Sahrens avl_destroy(&zap->zap_m.zap_avl); 277fa9e4066Sahrens } 278fa9e4066Sahrens 279fa9e4066Sahrens static zap_t * 280fa9e4066Sahrens mzap_open(objset_t *os, uint64_t obj, dmu_buf_t *db) 281fa9e4066Sahrens { 282fa9e4066Sahrens zap_t *winner; 283fa9e4066Sahrens zap_t *zap; 284fa9e4066Sahrens int i; 285fa9e4066Sahrens 286fa9e4066Sahrens ASSERT3U(MZAP_ENT_LEN, ==, sizeof (mzap_ent_phys_t)); 287fa9e4066Sahrens 288fa9e4066Sahrens zap = kmem_zalloc(sizeof (zap_t), KM_SLEEP); 289fa9e4066Sahrens rw_init(&zap->zap_rwlock, 0, 0, 0); 290fa9e4066Sahrens rw_enter(&zap->zap_rwlock, RW_WRITER); 291fa9e4066Sahrens zap->zap_objset = os; 292fa9e4066Sahrens zap->zap_object = obj; 293fa9e4066Sahrens zap->zap_dbuf = db; 294fa9e4066Sahrens 295da6c28aaSamw if (*(uint64_t *)db->db_data != ZBT_MICRO) { 296fa9e4066Sahrens mutex_init(&zap->zap_f.zap_num_entries_mtx, 0, 0, 0); 297f65e61c0Sahrens zap->zap_f.zap_block_shift = highbit(db->db_size) - 1; 298fa9e4066Sahrens } else { 299fa9e4066Sahrens zap->zap_ismicro = TRUE; 300fa9e4066Sahrens } 301fa9e4066Sahrens 302fa9e4066Sahrens /* 303fa9e4066Sahrens * Make sure that zap_ismicro is set before we let others see 304fa9e4066Sahrens * it, because zap_lockdir() checks zap_ismicro without the lock 305fa9e4066Sahrens * held. 306fa9e4066Sahrens */ 307455d5089Sahrens winner = dmu_buf_set_user(db, zap, &zap->zap_m.zap_phys, zap_evict); 308fa9e4066Sahrens 309fa9e4066Sahrens if (winner != NULL) { 310c25056deSgw rw_exit(&zap->zap_rwlock); 311c25056deSgw rw_destroy(&zap->zap_rwlock); 312c25056deSgw if (!zap->zap_ismicro) 313c25056deSgw mutex_destroy(&zap->zap_f.zap_num_entries_mtx); 314fa9e4066Sahrens kmem_free(zap, sizeof (zap_t)); 315fa9e4066Sahrens return (winner); 316fa9e4066Sahrens } 317fa9e4066Sahrens 318fa9e4066Sahrens if (zap->zap_ismicro) { 319fa9e4066Sahrens zap->zap_salt = zap->zap_m.zap_phys->mz_salt; 320da6c28aaSamw zap->zap_normflags = zap->zap_m.zap_phys->mz_normflags; 321fa9e4066Sahrens zap->zap_m.zap_num_chunks = db->db_size / MZAP_ENT_LEN - 1; 322fa9e4066Sahrens avl_create(&zap->zap_m.zap_avl, mze_compare, 323fa9e4066Sahrens sizeof (mzap_ent_t), offsetof(mzap_ent_t, mze_node)); 324fa9e4066Sahrens 325fa9e4066Sahrens for (i = 0; i < zap->zap_m.zap_num_chunks; i++) { 326fa9e4066Sahrens mzap_ent_phys_t *mze = 327fa9e4066Sahrens &zap->zap_m.zap_phys->mz_chunk[i]; 328fa9e4066Sahrens if (mze->mze_name[0]) { 329da6c28aaSamw zap_name_t *zn; 330da6c28aaSamw 331fa9e4066Sahrens zap->zap_m.zap_num_entries++; 332da6c28aaSamw zn = zap_name_alloc(zap, mze->mze_name, 333da6c28aaSamw MT_EXACT); 334da6c28aaSamw mze_insert(zap, i, zn->zn_hash, mze); 335da6c28aaSamw zap_name_free(zn); 336fa9e4066Sahrens } 337fa9e4066Sahrens } 338fa9e4066Sahrens } else { 339fa9e4066Sahrens zap->zap_salt = zap->zap_f.zap_phys->zap_salt; 340da6c28aaSamw zap->zap_normflags = zap->zap_f.zap_phys->zap_normflags; 341f65e61c0Sahrens 342f65e61c0Sahrens ASSERT3U(sizeof (struct zap_leaf_header), ==, 343f65e61c0Sahrens 2*ZAP_LEAF_CHUNKSIZE); 344f65e61c0Sahrens 345f65e61c0Sahrens /* 346f65e61c0Sahrens * The embedded pointer table should not overlap the 347f65e61c0Sahrens * other members. 348f65e61c0Sahrens */ 349f65e61c0Sahrens ASSERT3P(&ZAP_EMBEDDED_PTRTBL_ENT(zap, 0), >, 350f65e61c0Sahrens &zap->zap_f.zap_phys->zap_salt); 351f65e61c0Sahrens 352f65e61c0Sahrens /* 353f65e61c0Sahrens * The embedded pointer table should end at the end of 354f65e61c0Sahrens * the block 355f65e61c0Sahrens */ 356f65e61c0Sahrens ASSERT3U((uintptr_t)&ZAP_EMBEDDED_PTRTBL_ENT(zap, 357f65e61c0Sahrens 1<<ZAP_EMBEDDED_PTRTBL_SHIFT(zap)) - 358f65e61c0Sahrens (uintptr_t)zap->zap_f.zap_phys, ==, 359f65e61c0Sahrens zap->zap_dbuf->db_size); 360fa9e4066Sahrens } 361fa9e4066Sahrens rw_exit(&zap->zap_rwlock); 362fa9e4066Sahrens return (zap); 363fa9e4066Sahrens } 364fa9e4066Sahrens 365fa9e4066Sahrens int 366fa9e4066Sahrens zap_lockdir(objset_t *os, uint64_t obj, dmu_tx_t *tx, 367c5f9e431Sahrens krw_t lti, boolean_t fatreader, boolean_t adding, zap_t **zapp) 368fa9e4066Sahrens { 369fa9e4066Sahrens zap_t *zap; 370fa9e4066Sahrens dmu_buf_t *db; 371fa9e4066Sahrens krw_t lt; 372fa9e4066Sahrens int err; 373fa9e4066Sahrens 374fa9e4066Sahrens *zapp = NULL; 375fa9e4066Sahrens 376ea8dc4b6Seschrock err = dmu_buf_hold(os, obj, 0, NULL, &db); 377ea8dc4b6Seschrock if (err) 378ea8dc4b6Seschrock return (err); 379fa9e4066Sahrens 380fa9e4066Sahrens #ifdef ZFS_DEBUG 381fa9e4066Sahrens { 382fa9e4066Sahrens dmu_object_info_t doi; 383fa9e4066Sahrens dmu_object_info_from_db(db, &doi); 384fa9e4066Sahrens ASSERT(dmu_ot[doi.doi_type].ot_byteswap == zap_byteswap); 385fa9e4066Sahrens } 386fa9e4066Sahrens #endif 387fa9e4066Sahrens 388fa9e4066Sahrens zap = dmu_buf_get_user(db); 389fa9e4066Sahrens if (zap == NULL) 390fa9e4066Sahrens zap = mzap_open(os, obj, db); 391fa9e4066Sahrens 392fa9e4066Sahrens /* 393fa9e4066Sahrens * We're checking zap_ismicro without the lock held, in order to 394fa9e4066Sahrens * tell what type of lock we want. Once we have some sort of 395fa9e4066Sahrens * lock, see if it really is the right type. In practice this 396fa9e4066Sahrens * can only be different if it was upgraded from micro to fat, 397fa9e4066Sahrens * and micro wanted WRITER but fat only needs READER. 398fa9e4066Sahrens */ 399fa9e4066Sahrens lt = (!zap->zap_ismicro && fatreader) ? RW_READER : lti; 400fa9e4066Sahrens rw_enter(&zap->zap_rwlock, lt); 401fa9e4066Sahrens if (lt != ((!zap->zap_ismicro && fatreader) ? RW_READER : lti)) { 402fa9e4066Sahrens /* it was upgraded, now we only need reader */ 403fa9e4066Sahrens ASSERT(lt == RW_WRITER); 404fa9e4066Sahrens ASSERT(RW_READER == 405fa9e4066Sahrens (!zap->zap_ismicro && fatreader) ? RW_READER : lti); 406fa9e4066Sahrens rw_downgrade(&zap->zap_rwlock); 407fa9e4066Sahrens lt = RW_READER; 408fa9e4066Sahrens } 409fa9e4066Sahrens 410fa9e4066Sahrens zap->zap_objset = os; 411fa9e4066Sahrens 412fa9e4066Sahrens if (lt == RW_WRITER) 413fa9e4066Sahrens dmu_buf_will_dirty(db, tx); 414fa9e4066Sahrens 415fa9e4066Sahrens ASSERT3P(zap->zap_dbuf, ==, db); 416fa9e4066Sahrens 417fa9e4066Sahrens ASSERT(!zap->zap_ismicro || 418fa9e4066Sahrens zap->zap_m.zap_num_entries <= zap->zap_m.zap_num_chunks); 419c5f9e431Sahrens if (zap->zap_ismicro && tx && adding && 420fa9e4066Sahrens zap->zap_m.zap_num_entries == zap->zap_m.zap_num_chunks) { 421fa9e4066Sahrens uint64_t newsz = db->db_size + SPA_MINBLOCKSIZE; 422fa9e4066Sahrens if (newsz > MZAP_MAX_BLKSZ) { 423fa9e4066Sahrens dprintf("upgrading obj %llu: num_entries=%u\n", 424fa9e4066Sahrens obj, zap->zap_m.zap_num_entries); 425fa9e4066Sahrens *zapp = zap; 426ad860c82Sbonwick return (mzap_upgrade(zapp, tx)); 427fa9e4066Sahrens } 428fa9e4066Sahrens err = dmu_object_set_blocksize(os, obj, newsz, 0, tx); 429fa9e4066Sahrens ASSERT3U(err, ==, 0); 430fa9e4066Sahrens zap->zap_m.zap_num_chunks = 431fa9e4066Sahrens db->db_size / MZAP_ENT_LEN - 1; 432fa9e4066Sahrens } 433fa9e4066Sahrens 434fa9e4066Sahrens *zapp = zap; 435fa9e4066Sahrens return (0); 436fa9e4066Sahrens } 437fa9e4066Sahrens 438fa9e4066Sahrens void 439fa9e4066Sahrens zap_unlockdir(zap_t *zap) 440fa9e4066Sahrens { 441fa9e4066Sahrens rw_exit(&zap->zap_rwlock); 442ea8dc4b6Seschrock dmu_buf_rele(zap->zap_dbuf, NULL); 443fa9e4066Sahrens } 444fa9e4066Sahrens 445ad860c82Sbonwick static int 446ad860c82Sbonwick mzap_upgrade(zap_t **zapp, dmu_tx_t *tx) 447fa9e4066Sahrens { 448fa9e4066Sahrens mzap_phys_t *mzp; 449fa9e4066Sahrens int i, sz, nchunks, err; 450ad860c82Sbonwick zap_t *zap = *zapp; 451fa9e4066Sahrens 452fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 453fa9e4066Sahrens 454fa9e4066Sahrens sz = zap->zap_dbuf->db_size; 455fa9e4066Sahrens mzp = kmem_alloc(sz, KM_SLEEP); 456fa9e4066Sahrens bcopy(zap->zap_dbuf->db_data, mzp, sz); 457fa9e4066Sahrens nchunks = zap->zap_m.zap_num_chunks; 458fa9e4066Sahrens 459fa9e4066Sahrens err = dmu_object_set_blocksize(zap->zap_objset, zap->zap_object, 460f65e61c0Sahrens 1ULL << fzap_default_block_shift, 0, tx); 461ad860c82Sbonwick if (err) { 462ad860c82Sbonwick kmem_free(mzp, sz); 463ad860c82Sbonwick return (err); 464ad860c82Sbonwick } 465fa9e4066Sahrens 466fa9e4066Sahrens dprintf("upgrading obj=%llu with %u chunks\n", 467fa9e4066Sahrens zap->zap_object, nchunks); 468da6c28aaSamw /* XXX destroy the avl later, so we can use the stored hash value */ 469fa9e4066Sahrens mze_destroy(zap); 470fa9e4066Sahrens 471fa9e4066Sahrens fzap_upgrade(zap, tx); 472fa9e4066Sahrens 473fa9e4066Sahrens for (i = 0; i < nchunks; i++) { 474fa9e4066Sahrens int err; 475fa9e4066Sahrens mzap_ent_phys_t *mze = &mzp->mz_chunk[i]; 476da6c28aaSamw zap_name_t *zn; 477fa9e4066Sahrens if (mze->mze_name[0] == 0) 478fa9e4066Sahrens continue; 479fa9e4066Sahrens dprintf("adding %s=%llu\n", 480fa9e4066Sahrens mze->mze_name, mze->mze_value); 481da6c28aaSamw zn = zap_name_alloc(zap, mze->mze_name, MT_EXACT); 482ad860c82Sbonwick err = fzap_add_cd(zn, 8, 1, &mze->mze_value, mze->mze_cd, tx); 483ad860c82Sbonwick zap = zn->zn_zap; /* fzap_add_cd() may change zap */ 484da6c28aaSamw zap_name_free(zn); 485ad860c82Sbonwick if (err) 486ad860c82Sbonwick break; 487fa9e4066Sahrens } 488fa9e4066Sahrens kmem_free(mzp, sz); 489ad860c82Sbonwick *zapp = zap; 490ad860c82Sbonwick return (err); 491fa9e4066Sahrens } 492fa9e4066Sahrens 493fa9e4066Sahrens static void 494da6c28aaSamw mzap_create_impl(objset_t *os, uint64_t obj, int normflags, dmu_tx_t *tx) 495fa9e4066Sahrens { 496fa9e4066Sahrens dmu_buf_t *db; 497fa9e4066Sahrens mzap_phys_t *zp; 498fa9e4066Sahrens 499ea8dc4b6Seschrock VERIFY(0 == dmu_buf_hold(os, obj, 0, FTAG, &db)); 500fa9e4066Sahrens 501fa9e4066Sahrens #ifdef ZFS_DEBUG 502fa9e4066Sahrens { 503fa9e4066Sahrens dmu_object_info_t doi; 504fa9e4066Sahrens dmu_object_info_from_db(db, &doi); 505fa9e4066Sahrens ASSERT(dmu_ot[doi.doi_type].ot_byteswap == zap_byteswap); 506fa9e4066Sahrens } 507fa9e4066Sahrens #endif 508fa9e4066Sahrens 509fa9e4066Sahrens dmu_buf_will_dirty(db, tx); 510fa9e4066Sahrens zp = db->db_data; 511fa9e4066Sahrens zp->mz_block_type = ZBT_MICRO; 512fa9e4066Sahrens zp->mz_salt = ((uintptr_t)db ^ (uintptr_t)tx ^ (obj << 1)) | 1ULL; 513da6c28aaSamw zp->mz_normflags = normflags; 514ea8dc4b6Seschrock dmu_buf_rele(db, FTAG); 515fa9e4066Sahrens } 516fa9e4066Sahrens 517fa9e4066Sahrens int 518fa9e4066Sahrens zap_create_claim(objset_t *os, uint64_t obj, dmu_object_type_t ot, 519fa9e4066Sahrens dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) 520da6c28aaSamw { 521da6c28aaSamw return (zap_create_claim_norm(os, obj, 522da6c28aaSamw 0, ot, bonustype, bonuslen, tx)); 523da6c28aaSamw } 524da6c28aaSamw 525da6c28aaSamw int 526da6c28aaSamw zap_create_claim_norm(objset_t *os, uint64_t obj, int normflags, 527da6c28aaSamw dmu_object_type_t ot, 528da6c28aaSamw dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) 529fa9e4066Sahrens { 530fa9e4066Sahrens int err; 531fa9e4066Sahrens 532fa9e4066Sahrens err = dmu_object_claim(os, obj, ot, 0, bonustype, bonuslen, tx); 533fa9e4066Sahrens if (err != 0) 534fa9e4066Sahrens return (err); 535da6c28aaSamw mzap_create_impl(os, obj, normflags, tx); 536fa9e4066Sahrens return (0); 537fa9e4066Sahrens } 538fa9e4066Sahrens 539fa9e4066Sahrens uint64_t 540fa9e4066Sahrens zap_create(objset_t *os, dmu_object_type_t ot, 541fa9e4066Sahrens dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) 542da6c28aaSamw { 543da6c28aaSamw return (zap_create_norm(os, 0, ot, bonustype, bonuslen, tx)); 544da6c28aaSamw } 545da6c28aaSamw 546da6c28aaSamw uint64_t 547da6c28aaSamw zap_create_norm(objset_t *os, int normflags, dmu_object_type_t ot, 548da6c28aaSamw dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) 549fa9e4066Sahrens { 550fa9e4066Sahrens uint64_t obj = dmu_object_alloc(os, ot, 0, bonustype, bonuslen, tx); 551fa9e4066Sahrens 552da6c28aaSamw mzap_create_impl(os, obj, normflags, tx); 553fa9e4066Sahrens return (obj); 554fa9e4066Sahrens } 555fa9e4066Sahrens 556fa9e4066Sahrens int 557fa9e4066Sahrens zap_destroy(objset_t *os, uint64_t zapobj, dmu_tx_t *tx) 558fa9e4066Sahrens { 559fa9e4066Sahrens /* 560fa9e4066Sahrens * dmu_object_free will free the object number and free the 561fa9e4066Sahrens * data. Freeing the data will cause our pageout function to be 562fa9e4066Sahrens * called, which will destroy our data (zap_leaf_t's and zap_t). 563fa9e4066Sahrens */ 564fa9e4066Sahrens 565fa9e4066Sahrens return (dmu_object_free(os, zapobj, tx)); 566fa9e4066Sahrens } 567fa9e4066Sahrens 568fa9e4066Sahrens _NOTE(ARGSUSED(0)) 569fa9e4066Sahrens void 570455d5089Sahrens zap_evict(dmu_buf_t *db, void *vzap) 571fa9e4066Sahrens { 572455d5089Sahrens zap_t *zap = vzap; 573fa9e4066Sahrens 574fa9e4066Sahrens rw_destroy(&zap->zap_rwlock); 575fa9e4066Sahrens 576f65e61c0Sahrens if (zap->zap_ismicro) 577fa9e4066Sahrens mze_destroy(zap); 578c25056deSgw else 579c25056deSgw mutex_destroy(&zap->zap_f.zap_num_entries_mtx); 580fa9e4066Sahrens 581fa9e4066Sahrens kmem_free(zap, sizeof (zap_t)); 582fa9e4066Sahrens } 583fa9e4066Sahrens 584fa9e4066Sahrens int 585fa9e4066Sahrens zap_count(objset_t *os, uint64_t zapobj, uint64_t *count) 586fa9e4066Sahrens { 587fa9e4066Sahrens zap_t *zap; 588fa9e4066Sahrens int err; 589fa9e4066Sahrens 590c5f9e431Sahrens err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); 591fa9e4066Sahrens if (err) 592fa9e4066Sahrens return (err); 593fa9e4066Sahrens if (!zap->zap_ismicro) { 594fa9e4066Sahrens err = fzap_count(zap, count); 595fa9e4066Sahrens } else { 596fa9e4066Sahrens *count = zap->zap_m.zap_num_entries; 597fa9e4066Sahrens } 598fa9e4066Sahrens zap_unlockdir(zap); 599fa9e4066Sahrens return (err); 600fa9e4066Sahrens } 601fa9e4066Sahrens 602fa9e4066Sahrens /* 603da6c28aaSamw * zn may be NULL; if not specified, it will be computed if needed. 604da6c28aaSamw * See also the comment above zap_entry_normalization_conflict(). 605da6c28aaSamw */ 606da6c28aaSamw static boolean_t 607da6c28aaSamw mzap_normalization_conflict(zap_t *zap, zap_name_t *zn, mzap_ent_t *mze) 608da6c28aaSamw { 609da6c28aaSamw mzap_ent_t *other; 610da6c28aaSamw int direction = AVL_BEFORE; 611da6c28aaSamw boolean_t allocdzn = B_FALSE; 612da6c28aaSamw 613da6c28aaSamw if (zap->zap_normflags == 0) 614da6c28aaSamw return (B_FALSE); 615da6c28aaSamw 616da6c28aaSamw again: 617da6c28aaSamw for (other = avl_walk(&zap->zap_m.zap_avl, mze, direction); 618da6c28aaSamw other && other->mze_hash == mze->mze_hash; 619da6c28aaSamw other = avl_walk(&zap->zap_m.zap_avl, other, direction)) { 620da6c28aaSamw 621da6c28aaSamw if (zn == NULL) { 622da6c28aaSamw zn = zap_name_alloc(zap, mze->mze_phys.mze_name, 623da6c28aaSamw MT_FIRST); 624da6c28aaSamw allocdzn = B_TRUE; 625da6c28aaSamw } 626da6c28aaSamw if (zap_match(zn, other->mze_phys.mze_name)) { 627da6c28aaSamw if (allocdzn) 628da6c28aaSamw zap_name_free(zn); 629da6c28aaSamw return (B_TRUE); 630da6c28aaSamw } 631da6c28aaSamw } 632da6c28aaSamw 633da6c28aaSamw if (direction == AVL_BEFORE) { 634da6c28aaSamw direction = AVL_AFTER; 635da6c28aaSamw goto again; 636da6c28aaSamw } 637da6c28aaSamw 638da6c28aaSamw if (allocdzn) 639da6c28aaSamw zap_name_free(zn); 640da6c28aaSamw return (B_FALSE); 641da6c28aaSamw } 642da6c28aaSamw 643da6c28aaSamw /* 644da6c28aaSamw * Routines for manipulating attributes. 645fa9e4066Sahrens */ 646fa9e4066Sahrens 647fa9e4066Sahrens int 648fa9e4066Sahrens zap_lookup(objset_t *os, uint64_t zapobj, const char *name, 649fa9e4066Sahrens uint64_t integer_size, uint64_t num_integers, void *buf) 650da6c28aaSamw { 651da6c28aaSamw return (zap_lookup_norm(os, zapobj, name, integer_size, 652da6c28aaSamw num_integers, buf, MT_EXACT, NULL, 0, NULL)); 653da6c28aaSamw } 654da6c28aaSamw 655da6c28aaSamw int 656da6c28aaSamw zap_lookup_norm(objset_t *os, uint64_t zapobj, const char *name, 657da6c28aaSamw uint64_t integer_size, uint64_t num_integers, void *buf, 658da6c28aaSamw matchtype_t mt, char *realname, int rn_len, 659da6c28aaSamw boolean_t *ncp) 660fa9e4066Sahrens { 661fa9e4066Sahrens zap_t *zap; 662fa9e4066Sahrens int err; 663fa9e4066Sahrens mzap_ent_t *mze; 664da6c28aaSamw zap_name_t *zn; 665fa9e4066Sahrens 666c5f9e431Sahrens err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); 667fa9e4066Sahrens if (err) 668fa9e4066Sahrens return (err); 669da6c28aaSamw zn = zap_name_alloc(zap, name, mt); 670da6c28aaSamw if (zn == NULL) { 671da6c28aaSamw zap_unlockdir(zap); 672da6c28aaSamw return (ENOTSUP); 673da6c28aaSamw } 674da6c28aaSamw 675fa9e4066Sahrens if (!zap->zap_ismicro) { 676da6c28aaSamw err = fzap_lookup(zn, integer_size, num_integers, buf, 677da6c28aaSamw realname, rn_len, ncp); 678fa9e4066Sahrens } else { 679da6c28aaSamw mze = mze_find(zn); 680fa9e4066Sahrens if (mze == NULL) { 681fa9e4066Sahrens err = ENOENT; 682fa9e4066Sahrens } else { 683da6c28aaSamw if (num_integers < 1) { 684fa9e4066Sahrens err = EOVERFLOW; 685da6c28aaSamw } else if (integer_size != 8) { 686fa9e4066Sahrens err = EINVAL; 687da6c28aaSamw } else { 688fa9e4066Sahrens *(uint64_t *)buf = mze->mze_phys.mze_value; 689da6c28aaSamw (void) strlcpy(realname, 690da6c28aaSamw mze->mze_phys.mze_name, rn_len); 691da6c28aaSamw if (ncp) { 692da6c28aaSamw *ncp = mzap_normalization_conflict(zap, 693da6c28aaSamw zn, mze); 694da6c28aaSamw } 695da6c28aaSamw } 696fa9e4066Sahrens } 697fa9e4066Sahrens } 698da6c28aaSamw zap_name_free(zn); 699fa9e4066Sahrens zap_unlockdir(zap); 700fa9e4066Sahrens return (err); 701fa9e4066Sahrens } 702fa9e4066Sahrens 703fa9e4066Sahrens int 704fa9e4066Sahrens zap_length(objset_t *os, uint64_t zapobj, const char *name, 705fa9e4066Sahrens uint64_t *integer_size, uint64_t *num_integers) 706fa9e4066Sahrens { 707fa9e4066Sahrens zap_t *zap; 708fa9e4066Sahrens int err; 709fa9e4066Sahrens mzap_ent_t *mze; 710da6c28aaSamw zap_name_t *zn; 711fa9e4066Sahrens 712c5f9e431Sahrens err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); 713fa9e4066Sahrens if (err) 714fa9e4066Sahrens return (err); 715da6c28aaSamw zn = zap_name_alloc(zap, name, MT_EXACT); 716da6c28aaSamw if (zn == NULL) { 717da6c28aaSamw zap_unlockdir(zap); 718da6c28aaSamw return (ENOTSUP); 719da6c28aaSamw } 720fa9e4066Sahrens if (!zap->zap_ismicro) { 721da6c28aaSamw err = fzap_length(zn, integer_size, num_integers); 722fa9e4066Sahrens } else { 723da6c28aaSamw mze = mze_find(zn); 724fa9e4066Sahrens if (mze == NULL) { 725fa9e4066Sahrens err = ENOENT; 726fa9e4066Sahrens } else { 727fa9e4066Sahrens if (integer_size) 728fa9e4066Sahrens *integer_size = 8; 729fa9e4066Sahrens if (num_integers) 730fa9e4066Sahrens *num_integers = 1; 731fa9e4066Sahrens } 732fa9e4066Sahrens } 733da6c28aaSamw zap_name_free(zn); 734fa9e4066Sahrens zap_unlockdir(zap); 735fa9e4066Sahrens return (err); 736fa9e4066Sahrens } 737fa9e4066Sahrens 738fa9e4066Sahrens static void 739da6c28aaSamw mzap_addent(zap_name_t *zn, uint64_t value) 740fa9e4066Sahrens { 741fa9e4066Sahrens int i; 742da6c28aaSamw zap_t *zap = zn->zn_zap; 743fa9e4066Sahrens int start = zap->zap_m.zap_alloc_next; 744fa9e4066Sahrens uint32_t cd; 745fa9e4066Sahrens 746da6c28aaSamw dprintf("obj=%llu %s=%llu\n", zap->zap_object, 747da6c28aaSamw zn->zn_name_orij, value); 748fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 749fa9e4066Sahrens 750fa9e4066Sahrens #ifdef ZFS_DEBUG 751fa9e4066Sahrens for (i = 0; i < zap->zap_m.zap_num_chunks; i++) { 752fa9e4066Sahrens mzap_ent_phys_t *mze = &zap->zap_m.zap_phys->mz_chunk[i]; 753da6c28aaSamw ASSERT(strcmp(zn->zn_name_orij, mze->mze_name) != 0); 754fa9e4066Sahrens } 755fa9e4066Sahrens #endif 756fa9e4066Sahrens 757da6c28aaSamw cd = mze_find_unused_cd(zap, zn->zn_hash); 758fa9e4066Sahrens /* given the limited size of the microzap, this can't happen */ 759fa9e4066Sahrens ASSERT(cd != ZAP_MAXCD); 760fa9e4066Sahrens 761fa9e4066Sahrens again: 762fa9e4066Sahrens for (i = start; i < zap->zap_m.zap_num_chunks; i++) { 763fa9e4066Sahrens mzap_ent_phys_t *mze = &zap->zap_m.zap_phys->mz_chunk[i]; 764fa9e4066Sahrens if (mze->mze_name[0] == 0) { 765fa9e4066Sahrens mze->mze_value = value; 766fa9e4066Sahrens mze->mze_cd = cd; 767da6c28aaSamw (void) strcpy(mze->mze_name, zn->zn_name_orij); 768fa9e4066Sahrens zap->zap_m.zap_num_entries++; 769fa9e4066Sahrens zap->zap_m.zap_alloc_next = i+1; 770fa9e4066Sahrens if (zap->zap_m.zap_alloc_next == 771fa9e4066Sahrens zap->zap_m.zap_num_chunks) 772fa9e4066Sahrens zap->zap_m.zap_alloc_next = 0; 773da6c28aaSamw mze_insert(zap, i, zn->zn_hash, mze); 774fa9e4066Sahrens return; 775fa9e4066Sahrens } 776fa9e4066Sahrens } 777fa9e4066Sahrens if (start != 0) { 778fa9e4066Sahrens start = 0; 779fa9e4066Sahrens goto again; 780fa9e4066Sahrens } 781fa9e4066Sahrens ASSERT(!"out of entries!"); 782fa9e4066Sahrens } 783fa9e4066Sahrens 784fa9e4066Sahrens int 785fa9e4066Sahrens zap_add(objset_t *os, uint64_t zapobj, const char *name, 786fa9e4066Sahrens int integer_size, uint64_t num_integers, 787fa9e4066Sahrens const void *val, dmu_tx_t *tx) 788fa9e4066Sahrens { 789fa9e4066Sahrens zap_t *zap; 790fa9e4066Sahrens int err; 791fa9e4066Sahrens mzap_ent_t *mze; 792fa9e4066Sahrens const uint64_t *intval = val; 793da6c28aaSamw zap_name_t *zn; 794fa9e4066Sahrens 795c5f9e431Sahrens err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, &zap); 796fa9e4066Sahrens if (err) 797fa9e4066Sahrens return (err); 798da6c28aaSamw zn = zap_name_alloc(zap, name, MT_EXACT); 799da6c28aaSamw if (zn == NULL) { 800da6c28aaSamw zap_unlockdir(zap); 801da6c28aaSamw return (ENOTSUP); 802da6c28aaSamw } 803fa9e4066Sahrens if (!zap->zap_ismicro) { 804da6c28aaSamw err = fzap_add(zn, integer_size, num_integers, val, tx); 805ad860c82Sbonwick zap = zn->zn_zap; /* fzap_add() may change zap */ 806fa9e4066Sahrens } else if (integer_size != 8 || num_integers != 1 || 807fa9e4066Sahrens strlen(name) >= MZAP_NAME_LEN) { 808fa9e4066Sahrens dprintf("upgrading obj %llu: intsz=%u numint=%llu name=%s\n", 809fa9e4066Sahrens zapobj, integer_size, num_integers, name); 810ad860c82Sbonwick err = mzap_upgrade(&zn->zn_zap, tx); 811ad860c82Sbonwick if (err == 0) 812ad860c82Sbonwick err = fzap_add(zn, integer_size, num_integers, val, tx); 813ad860c82Sbonwick zap = zn->zn_zap; /* fzap_add() may change zap */ 814fa9e4066Sahrens } else { 815da6c28aaSamw mze = mze_find(zn); 816fa9e4066Sahrens if (mze != NULL) { 817fa9e4066Sahrens err = EEXIST; 818fa9e4066Sahrens } else { 819da6c28aaSamw mzap_addent(zn, *intval); 820fa9e4066Sahrens } 821fa9e4066Sahrens } 822ad860c82Sbonwick ASSERT(zap == zn->zn_zap); 823da6c28aaSamw zap_name_free(zn); 824ad860c82Sbonwick if (zap != NULL) /* may be NULL if fzap_add() failed */ 825ad860c82Sbonwick zap_unlockdir(zap); 826fa9e4066Sahrens return (err); 827fa9e4066Sahrens } 828fa9e4066Sahrens 829fa9e4066Sahrens int 830fa9e4066Sahrens zap_update(objset_t *os, uint64_t zapobj, const char *name, 831fa9e4066Sahrens int integer_size, uint64_t num_integers, const void *val, dmu_tx_t *tx) 832fa9e4066Sahrens { 833fa9e4066Sahrens zap_t *zap; 834fa9e4066Sahrens mzap_ent_t *mze; 835fa9e4066Sahrens const uint64_t *intval = val; 836da6c28aaSamw zap_name_t *zn; 837fa9e4066Sahrens int err; 838fa9e4066Sahrens 839c5f9e431Sahrens err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, &zap); 840fa9e4066Sahrens if (err) 841fa9e4066Sahrens return (err); 842da6c28aaSamw zn = zap_name_alloc(zap, name, MT_EXACT); 843da6c28aaSamw if (zn == NULL) { 844da6c28aaSamw zap_unlockdir(zap); 845da6c28aaSamw return (ENOTSUP); 846da6c28aaSamw } 847fa9e4066Sahrens if (!zap->zap_ismicro) { 848da6c28aaSamw err = fzap_update(zn, integer_size, num_integers, val, tx); 849ad860c82Sbonwick zap = zn->zn_zap; /* fzap_update() may change zap */ 850fa9e4066Sahrens } else if (integer_size != 8 || num_integers != 1 || 851fa9e4066Sahrens strlen(name) >= MZAP_NAME_LEN) { 852fa9e4066Sahrens dprintf("upgrading obj %llu: intsz=%u numint=%llu name=%s\n", 853fa9e4066Sahrens zapobj, integer_size, num_integers, name); 854ad860c82Sbonwick err = mzap_upgrade(&zn->zn_zap, tx); 855ad860c82Sbonwick if (err == 0) 856ad860c82Sbonwick err = fzap_update(zn, integer_size, num_integers, 857ad860c82Sbonwick val, tx); 858ad860c82Sbonwick zap = zn->zn_zap; /* fzap_update() may change zap */ 859fa9e4066Sahrens } else { 860da6c28aaSamw mze = mze_find(zn); 861fa9e4066Sahrens if (mze != NULL) { 862fa9e4066Sahrens mze->mze_phys.mze_value = *intval; 863fa9e4066Sahrens zap->zap_m.zap_phys->mz_chunk 864fa9e4066Sahrens [mze->mze_chunkid].mze_value = *intval; 865fa9e4066Sahrens } else { 866da6c28aaSamw mzap_addent(zn, *intval); 867fa9e4066Sahrens } 868fa9e4066Sahrens } 869ad860c82Sbonwick ASSERT(zap == zn->zn_zap); 870da6c28aaSamw zap_name_free(zn); 871ad860c82Sbonwick if (zap != NULL) /* may be NULL if fzap_upgrade() failed */ 872ad860c82Sbonwick zap_unlockdir(zap); 873455d5089Sahrens return (err); 874fa9e4066Sahrens } 875fa9e4066Sahrens 876fa9e4066Sahrens int 877fa9e4066Sahrens zap_remove(objset_t *os, uint64_t zapobj, const char *name, dmu_tx_t *tx) 878da6c28aaSamw { 879da6c28aaSamw return (zap_remove_norm(os, zapobj, name, MT_EXACT, tx)); 880da6c28aaSamw } 881da6c28aaSamw 882da6c28aaSamw int 883da6c28aaSamw zap_remove_norm(objset_t *os, uint64_t zapobj, const char *name, 884da6c28aaSamw matchtype_t mt, dmu_tx_t *tx) 885fa9e4066Sahrens { 886fa9e4066Sahrens zap_t *zap; 887fa9e4066Sahrens int err; 888fa9e4066Sahrens mzap_ent_t *mze; 889da6c28aaSamw zap_name_t *zn; 890fa9e4066Sahrens 891c5f9e431Sahrens err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, FALSE, &zap); 892fa9e4066Sahrens if (err) 893fa9e4066Sahrens return (err); 894da6c28aaSamw zn = zap_name_alloc(zap, name, mt); 895da6c28aaSamw if (zn == NULL) { 896da6c28aaSamw zap_unlockdir(zap); 897da6c28aaSamw return (ENOTSUP); 898da6c28aaSamw } 899fa9e4066Sahrens if (!zap->zap_ismicro) { 900da6c28aaSamw err = fzap_remove(zn, tx); 901fa9e4066Sahrens } else { 902da6c28aaSamw mze = mze_find(zn); 903fa9e4066Sahrens if (mze == NULL) { 904fa9e4066Sahrens err = ENOENT; 905fa9e4066Sahrens } else { 906fa9e4066Sahrens zap->zap_m.zap_num_entries--; 907fa9e4066Sahrens bzero(&zap->zap_m.zap_phys->mz_chunk[mze->mze_chunkid], 908fa9e4066Sahrens sizeof (mzap_ent_phys_t)); 909fa9e4066Sahrens mze_remove(zap, mze); 910fa9e4066Sahrens } 911fa9e4066Sahrens } 912da6c28aaSamw zap_name_free(zn); 913fa9e4066Sahrens zap_unlockdir(zap); 914fa9e4066Sahrens return (err); 915fa9e4066Sahrens } 916fa9e4066Sahrens 917fa9e4066Sahrens /* 918fa9e4066Sahrens * Routines for iterating over the attributes. 919fa9e4066Sahrens */ 920fa9e4066Sahrens 921fa9e4066Sahrens /* 922fa9e4066Sahrens * We want to keep the high 32 bits of the cursor zero if we can, so 923fa9e4066Sahrens * that 32-bit programs can access this. So use a small hash value so 924fa9e4066Sahrens * we can fit 4 bits of cd into the 32-bit cursor. 925fa9e4066Sahrens * 926fa9e4066Sahrens * [ 4 zero bits | 32-bit collision differentiator | 28-bit hash value ] 927fa9e4066Sahrens */ 928fa9e4066Sahrens void 929fa9e4066Sahrens zap_cursor_init_serialized(zap_cursor_t *zc, objset_t *os, uint64_t zapobj, 930fa9e4066Sahrens uint64_t serialized) 931fa9e4066Sahrens { 932fa9e4066Sahrens zc->zc_objset = os; 93387e5029aSahrens zc->zc_zap = NULL; 93487e5029aSahrens zc->zc_leaf = NULL; 935fa9e4066Sahrens zc->zc_zapobj = zapobj; 936fa9e4066Sahrens if (serialized == -1ULL) { 937fa9e4066Sahrens zc->zc_hash = -1ULL; 938fa9e4066Sahrens zc->zc_cd = 0; 939fa9e4066Sahrens } else { 940fa9e4066Sahrens zc->zc_hash = serialized << (64-ZAP_HASHBITS); 941fa9e4066Sahrens zc->zc_cd = serialized >> ZAP_HASHBITS; 942fa9e4066Sahrens if (zc->zc_cd >= ZAP_MAXCD) /* corrupt serialized */ 943fa9e4066Sahrens zc->zc_cd = 0; 944fa9e4066Sahrens } 945fa9e4066Sahrens } 946fa9e4066Sahrens 94787e5029aSahrens void 94887e5029aSahrens zap_cursor_init(zap_cursor_t *zc, objset_t *os, uint64_t zapobj) 94987e5029aSahrens { 95087e5029aSahrens zap_cursor_init_serialized(zc, os, zapobj, 0); 95187e5029aSahrens } 95287e5029aSahrens 95387e5029aSahrens void 95487e5029aSahrens zap_cursor_fini(zap_cursor_t *zc) 95587e5029aSahrens { 95687e5029aSahrens if (zc->zc_zap) { 95787e5029aSahrens rw_enter(&zc->zc_zap->zap_rwlock, RW_READER); 95887e5029aSahrens zap_unlockdir(zc->zc_zap); 95987e5029aSahrens zc->zc_zap = NULL; 96087e5029aSahrens } 96187e5029aSahrens if (zc->zc_leaf) { 96287e5029aSahrens rw_enter(&zc->zc_leaf->l_rwlock, RW_READER); 96387e5029aSahrens zap_put_leaf(zc->zc_leaf); 96487e5029aSahrens zc->zc_leaf = NULL; 96587e5029aSahrens } 96687e5029aSahrens zc->zc_objset = NULL; 96787e5029aSahrens } 96887e5029aSahrens 969fa9e4066Sahrens uint64_t 970fa9e4066Sahrens zap_cursor_serialize(zap_cursor_t *zc) 971fa9e4066Sahrens { 972fa9e4066Sahrens if (zc->zc_hash == -1ULL) 973fa9e4066Sahrens return (-1ULL); 974fa9e4066Sahrens ASSERT((zc->zc_hash & (ZAP_MAXCD-1)) == 0); 975fa9e4066Sahrens ASSERT(zc->zc_cd < ZAP_MAXCD); 976fa9e4066Sahrens return ((zc->zc_hash >> (64-ZAP_HASHBITS)) | 977fa9e4066Sahrens ((uint64_t)zc->zc_cd << ZAP_HASHBITS)); 978fa9e4066Sahrens } 979fa9e4066Sahrens 980fa9e4066Sahrens int 981fa9e4066Sahrens zap_cursor_retrieve(zap_cursor_t *zc, zap_attribute_t *za) 982fa9e4066Sahrens { 983fa9e4066Sahrens int err; 984fa9e4066Sahrens avl_index_t idx; 985fa9e4066Sahrens mzap_ent_t mze_tofind; 986fa9e4066Sahrens mzap_ent_t *mze; 987fa9e4066Sahrens 988fa9e4066Sahrens if (zc->zc_hash == -1ULL) 989fa9e4066Sahrens return (ENOENT); 990fa9e4066Sahrens 99187e5029aSahrens if (zc->zc_zap == NULL) { 99287e5029aSahrens err = zap_lockdir(zc->zc_objset, zc->zc_zapobj, NULL, 993c5f9e431Sahrens RW_READER, TRUE, FALSE, &zc->zc_zap); 99487e5029aSahrens if (err) 99587e5029aSahrens return (err); 99687e5029aSahrens } else { 99787e5029aSahrens rw_enter(&zc->zc_zap->zap_rwlock, RW_READER); 99887e5029aSahrens } 99987e5029aSahrens if (!zc->zc_zap->zap_ismicro) { 100087e5029aSahrens err = fzap_cursor_retrieve(zc->zc_zap, zc, za); 1001fa9e4066Sahrens } else { 1002fa9e4066Sahrens err = ENOENT; 1003fa9e4066Sahrens 1004fa9e4066Sahrens mze_tofind.mze_hash = zc->zc_hash; 1005fa9e4066Sahrens mze_tofind.mze_phys.mze_cd = zc->zc_cd; 1006fa9e4066Sahrens 100787e5029aSahrens mze = avl_find(&zc->zc_zap->zap_m.zap_avl, &mze_tofind, &idx); 100887e5029aSahrens if (mze == NULL) { 100987e5029aSahrens mze = avl_nearest(&zc->zc_zap->zap_m.zap_avl, 101087e5029aSahrens idx, AVL_AFTER); 101187e5029aSahrens } 1012fa9e4066Sahrens if (mze) { 1013da6c28aaSamw ASSERT(0 == bcmp(&mze->mze_phys, 1014da6c28aaSamw &zc->zc_zap->zap_m.zap_phys->mz_chunk 1015da6c28aaSamw [mze->mze_chunkid], sizeof (mze->mze_phys))); 1016da6c28aaSamw 1017da6c28aaSamw za->za_normalization_conflict = 1018da6c28aaSamw mzap_normalization_conflict(zc->zc_zap, NULL, mze); 1019fa9e4066Sahrens za->za_integer_length = 8; 1020fa9e4066Sahrens za->za_num_integers = 1; 1021fa9e4066Sahrens za->za_first_integer = mze->mze_phys.mze_value; 1022fa9e4066Sahrens (void) strcpy(za->za_name, mze->mze_phys.mze_name); 1023fa9e4066Sahrens zc->zc_hash = mze->mze_hash; 1024fa9e4066Sahrens zc->zc_cd = mze->mze_phys.mze_cd; 1025fa9e4066Sahrens err = 0; 1026fa9e4066Sahrens } else { 1027fa9e4066Sahrens zc->zc_hash = -1ULL; 1028fa9e4066Sahrens } 1029fa9e4066Sahrens } 103087e5029aSahrens rw_exit(&zc->zc_zap->zap_rwlock); 1031fa9e4066Sahrens return (err); 1032fa9e4066Sahrens } 1033fa9e4066Sahrens 1034fa9e4066Sahrens void 1035fa9e4066Sahrens zap_cursor_advance(zap_cursor_t *zc) 1036fa9e4066Sahrens { 1037fa9e4066Sahrens if (zc->zc_hash == -1ULL) 1038fa9e4066Sahrens return; 1039fa9e4066Sahrens zc->zc_cd++; 1040fa9e4066Sahrens if (zc->zc_cd >= ZAP_MAXCD) { 1041fa9e4066Sahrens zc->zc_cd = 0; 1042fa9e4066Sahrens zc->zc_hash += 1ULL<<(64-ZAP_HASHBITS); 1043fa9e4066Sahrens if (zc->zc_hash == 0) /* EOF */ 1044fa9e4066Sahrens zc->zc_hash = -1ULL; 1045fa9e4066Sahrens } 1046fa9e4066Sahrens } 1047fa9e4066Sahrens 1048fa9e4066Sahrens int 1049fa9e4066Sahrens zap_get_stats(objset_t *os, uint64_t zapobj, zap_stats_t *zs) 1050fa9e4066Sahrens { 1051fa9e4066Sahrens int err; 1052fa9e4066Sahrens zap_t *zap; 1053fa9e4066Sahrens 1054c5f9e431Sahrens err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); 1055fa9e4066Sahrens if (err) 1056fa9e4066Sahrens return (err); 1057fa9e4066Sahrens 1058fa9e4066Sahrens bzero(zs, sizeof (zap_stats_t)); 1059fa9e4066Sahrens 1060fa9e4066Sahrens if (zap->zap_ismicro) { 1061fa9e4066Sahrens zs->zs_blocksize = zap->zap_dbuf->db_size; 1062fa9e4066Sahrens zs->zs_num_entries = zap->zap_m.zap_num_entries; 1063fa9e4066Sahrens zs->zs_num_blocks = 1; 1064fa9e4066Sahrens } else { 1065fa9e4066Sahrens fzap_get_stats(zap, zs); 1066fa9e4066Sahrens } 1067fa9e4066Sahrens zap_unlockdir(zap); 1068fa9e4066Sahrens return (0); 1069fa9e4066Sahrens } 1070