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> 36*de8267e0Stimh 37*de8267e0Stimh #ifdef _KERNEL 38*de8267e0Stimh #include <sys/sunddi.h> 39*de8267e0Stimh #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); 142fa9e4066Sahrens max = (size / MZAP_ENT_LEN) - 1; 143fa9e4066Sahrens for (i = 0; i < max; i++) { 144fa9e4066Sahrens buf->mz_chunk[i].mze_value = 145fa9e4066Sahrens BSWAP_64(buf->mz_chunk[i].mze_value); 146fa9e4066Sahrens buf->mz_chunk[i].mze_cd = 147fa9e4066Sahrens BSWAP_32(buf->mz_chunk[i].mze_cd); 148fa9e4066Sahrens } 149fa9e4066Sahrens } 150fa9e4066Sahrens 151fa9e4066Sahrens void 152fa9e4066Sahrens zap_byteswap(void *buf, size_t size) 153fa9e4066Sahrens { 154fa9e4066Sahrens uint64_t block_type; 155fa9e4066Sahrens 156fa9e4066Sahrens block_type = *(uint64_t *)buf; 157fa9e4066Sahrens 1585ad82045Snd if (block_type == ZBT_MICRO || block_type == BSWAP_64(ZBT_MICRO)) { 159fa9e4066Sahrens /* ASSERT(magic == ZAP_LEAF_MAGIC); */ 160fa9e4066Sahrens mzap_byteswap(buf, size); 1615ad82045Snd } else { 162fa9e4066Sahrens fzap_byteswap(buf, size); 163fa9e4066Sahrens } 164fa9e4066Sahrens } 165fa9e4066Sahrens 166fa9e4066Sahrens static int 167fa9e4066Sahrens mze_compare(const void *arg1, const void *arg2) 168fa9e4066Sahrens { 169fa9e4066Sahrens const mzap_ent_t *mze1 = arg1; 170fa9e4066Sahrens const mzap_ent_t *mze2 = arg2; 171fa9e4066Sahrens 172fa9e4066Sahrens if (mze1->mze_hash > mze2->mze_hash) 173fa9e4066Sahrens return (+1); 174fa9e4066Sahrens if (mze1->mze_hash < mze2->mze_hash) 175fa9e4066Sahrens return (-1); 176fa9e4066Sahrens if (mze1->mze_phys.mze_cd > mze2->mze_phys.mze_cd) 177fa9e4066Sahrens return (+1); 178fa9e4066Sahrens if (mze1->mze_phys.mze_cd < mze2->mze_phys.mze_cd) 179fa9e4066Sahrens return (-1); 180fa9e4066Sahrens return (0); 181fa9e4066Sahrens } 182fa9e4066Sahrens 183fa9e4066Sahrens static void 184fa9e4066Sahrens mze_insert(zap_t *zap, int chunkid, uint64_t hash, mzap_ent_phys_t *mzep) 185fa9e4066Sahrens { 186fa9e4066Sahrens mzap_ent_t *mze; 187fa9e4066Sahrens 188fa9e4066Sahrens ASSERT(zap->zap_ismicro); 189fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 190fa9e4066Sahrens ASSERT(mzep->mze_cd < ZAP_MAXCD); 191fa9e4066Sahrens 192fa9e4066Sahrens mze = kmem_alloc(sizeof (mzap_ent_t), KM_SLEEP); 193fa9e4066Sahrens mze->mze_chunkid = chunkid; 194fa9e4066Sahrens mze->mze_hash = hash; 195fa9e4066Sahrens mze->mze_phys = *mzep; 196fa9e4066Sahrens avl_add(&zap->zap_m.zap_avl, mze); 197fa9e4066Sahrens } 198fa9e4066Sahrens 199fa9e4066Sahrens static mzap_ent_t * 200da6c28aaSamw mze_find(zap_name_t *zn) 201fa9e4066Sahrens { 202fa9e4066Sahrens mzap_ent_t mze_tofind; 203fa9e4066Sahrens mzap_ent_t *mze; 204fa9e4066Sahrens avl_index_t idx; 205da6c28aaSamw avl_tree_t *avl = &zn->zn_zap->zap_m.zap_avl; 206fa9e4066Sahrens 207da6c28aaSamw ASSERT(zn->zn_zap->zap_ismicro); 208da6c28aaSamw ASSERT(RW_LOCK_HELD(&zn->zn_zap->zap_rwlock)); 209fa9e4066Sahrens 210da6c28aaSamw if (strlen(zn->zn_name_norm) >= sizeof (mze_tofind.mze_phys.mze_name)) 211fa9e4066Sahrens return (NULL); 212fa9e4066Sahrens 213da6c28aaSamw mze_tofind.mze_hash = zn->zn_hash; 214fa9e4066Sahrens mze_tofind.mze_phys.mze_cd = 0; 215fa9e4066Sahrens 216da6c28aaSamw again: 217fa9e4066Sahrens mze = avl_find(avl, &mze_tofind, &idx); 218fa9e4066Sahrens if (mze == NULL) 219fa9e4066Sahrens mze = avl_nearest(avl, idx, AVL_AFTER); 220da6c28aaSamw for (; mze && mze->mze_hash == zn->zn_hash; mze = AVL_NEXT(avl, mze)) { 221da6c28aaSamw if (zap_match(zn, mze->mze_phys.mze_name)) 222fa9e4066Sahrens return (mze); 223fa9e4066Sahrens } 224da6c28aaSamw if (zn->zn_matchtype == MT_BEST) { 225da6c28aaSamw zn->zn_matchtype = MT_FIRST; 226da6c28aaSamw goto again; 227da6c28aaSamw } 228fa9e4066Sahrens return (NULL); 229fa9e4066Sahrens } 230fa9e4066Sahrens 231fa9e4066Sahrens static uint32_t 232fa9e4066Sahrens mze_find_unused_cd(zap_t *zap, uint64_t hash) 233fa9e4066Sahrens { 234fa9e4066Sahrens mzap_ent_t mze_tofind; 235fa9e4066Sahrens mzap_ent_t *mze; 236fa9e4066Sahrens avl_index_t idx; 237fa9e4066Sahrens avl_tree_t *avl = &zap->zap_m.zap_avl; 238fa9e4066Sahrens uint32_t cd; 239fa9e4066Sahrens 240fa9e4066Sahrens ASSERT(zap->zap_ismicro); 241fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 242fa9e4066Sahrens 243fa9e4066Sahrens mze_tofind.mze_hash = hash; 244fa9e4066Sahrens mze_tofind.mze_phys.mze_cd = 0; 245fa9e4066Sahrens 246fa9e4066Sahrens cd = 0; 247fa9e4066Sahrens for (mze = avl_find(avl, &mze_tofind, &idx); 248fa9e4066Sahrens mze && mze->mze_hash == hash; mze = AVL_NEXT(avl, mze)) { 249fa9e4066Sahrens if (mze->mze_phys.mze_cd != cd) 250fa9e4066Sahrens break; 251fa9e4066Sahrens cd++; 252fa9e4066Sahrens } 253fa9e4066Sahrens 254fa9e4066Sahrens return (cd); 255fa9e4066Sahrens } 256fa9e4066Sahrens 257fa9e4066Sahrens static void 258fa9e4066Sahrens mze_remove(zap_t *zap, mzap_ent_t *mze) 259fa9e4066Sahrens { 260fa9e4066Sahrens ASSERT(zap->zap_ismicro); 261fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 262fa9e4066Sahrens 263fa9e4066Sahrens avl_remove(&zap->zap_m.zap_avl, mze); 264fa9e4066Sahrens kmem_free(mze, sizeof (mzap_ent_t)); 265fa9e4066Sahrens } 266fa9e4066Sahrens 267fa9e4066Sahrens static void 268fa9e4066Sahrens mze_destroy(zap_t *zap) 269fa9e4066Sahrens { 270fa9e4066Sahrens mzap_ent_t *mze; 271fa9e4066Sahrens void *avlcookie = NULL; 272fa9e4066Sahrens 273fa9e4066Sahrens while (mze = avl_destroy_nodes(&zap->zap_m.zap_avl, &avlcookie)) 274fa9e4066Sahrens kmem_free(mze, sizeof (mzap_ent_t)); 275fa9e4066Sahrens avl_destroy(&zap->zap_m.zap_avl); 276fa9e4066Sahrens } 277fa9e4066Sahrens 278fa9e4066Sahrens static zap_t * 279fa9e4066Sahrens mzap_open(objset_t *os, uint64_t obj, dmu_buf_t *db) 280fa9e4066Sahrens { 281fa9e4066Sahrens zap_t *winner; 282fa9e4066Sahrens zap_t *zap; 283fa9e4066Sahrens int i; 284fa9e4066Sahrens 285fa9e4066Sahrens ASSERT3U(MZAP_ENT_LEN, ==, sizeof (mzap_ent_phys_t)); 286fa9e4066Sahrens 287fa9e4066Sahrens zap = kmem_zalloc(sizeof (zap_t), KM_SLEEP); 288fa9e4066Sahrens rw_init(&zap->zap_rwlock, 0, 0, 0); 289fa9e4066Sahrens rw_enter(&zap->zap_rwlock, RW_WRITER); 290fa9e4066Sahrens zap->zap_objset = os; 291fa9e4066Sahrens zap->zap_object = obj; 292fa9e4066Sahrens zap->zap_dbuf = db; 293fa9e4066Sahrens 294da6c28aaSamw if (*(uint64_t *)db->db_data != ZBT_MICRO) { 295fa9e4066Sahrens mutex_init(&zap->zap_f.zap_num_entries_mtx, 0, 0, 0); 296f65e61c0Sahrens zap->zap_f.zap_block_shift = highbit(db->db_size) - 1; 297fa9e4066Sahrens } else { 298fa9e4066Sahrens zap->zap_ismicro = TRUE; 299fa9e4066Sahrens } 300fa9e4066Sahrens 301fa9e4066Sahrens /* 302fa9e4066Sahrens * Make sure that zap_ismicro is set before we let others see 303fa9e4066Sahrens * it, because zap_lockdir() checks zap_ismicro without the lock 304fa9e4066Sahrens * held. 305fa9e4066Sahrens */ 306455d5089Sahrens winner = dmu_buf_set_user(db, zap, &zap->zap_m.zap_phys, zap_evict); 307fa9e4066Sahrens 308fa9e4066Sahrens if (winner != NULL) { 309c25056deSgw rw_exit(&zap->zap_rwlock); 310c25056deSgw rw_destroy(&zap->zap_rwlock); 311c25056deSgw if (!zap->zap_ismicro) 312c25056deSgw mutex_destroy(&zap->zap_f.zap_num_entries_mtx); 313fa9e4066Sahrens kmem_free(zap, sizeof (zap_t)); 314fa9e4066Sahrens return (winner); 315fa9e4066Sahrens } 316fa9e4066Sahrens 317fa9e4066Sahrens if (zap->zap_ismicro) { 318fa9e4066Sahrens zap->zap_salt = zap->zap_m.zap_phys->mz_salt; 319da6c28aaSamw zap->zap_normflags = zap->zap_m.zap_phys->mz_normflags; 320fa9e4066Sahrens zap->zap_m.zap_num_chunks = db->db_size / MZAP_ENT_LEN - 1; 321fa9e4066Sahrens avl_create(&zap->zap_m.zap_avl, mze_compare, 322fa9e4066Sahrens sizeof (mzap_ent_t), offsetof(mzap_ent_t, mze_node)); 323fa9e4066Sahrens 324fa9e4066Sahrens for (i = 0; i < zap->zap_m.zap_num_chunks; i++) { 325fa9e4066Sahrens mzap_ent_phys_t *mze = 326fa9e4066Sahrens &zap->zap_m.zap_phys->mz_chunk[i]; 327fa9e4066Sahrens if (mze->mze_name[0]) { 328da6c28aaSamw zap_name_t *zn; 329da6c28aaSamw 330fa9e4066Sahrens zap->zap_m.zap_num_entries++; 331da6c28aaSamw zn = zap_name_alloc(zap, mze->mze_name, 332da6c28aaSamw MT_EXACT); 333da6c28aaSamw mze_insert(zap, i, zn->zn_hash, mze); 334da6c28aaSamw zap_name_free(zn); 335fa9e4066Sahrens } 336fa9e4066Sahrens } 337fa9e4066Sahrens } else { 338fa9e4066Sahrens zap->zap_salt = zap->zap_f.zap_phys->zap_salt; 339da6c28aaSamw zap->zap_normflags = zap->zap_f.zap_phys->zap_normflags; 340f65e61c0Sahrens 341f65e61c0Sahrens ASSERT3U(sizeof (struct zap_leaf_header), ==, 342f65e61c0Sahrens 2*ZAP_LEAF_CHUNKSIZE); 343f65e61c0Sahrens 344f65e61c0Sahrens /* 345f65e61c0Sahrens * The embedded pointer table should not overlap the 346f65e61c0Sahrens * other members. 347f65e61c0Sahrens */ 348f65e61c0Sahrens ASSERT3P(&ZAP_EMBEDDED_PTRTBL_ENT(zap, 0), >, 349f65e61c0Sahrens &zap->zap_f.zap_phys->zap_salt); 350f65e61c0Sahrens 351f65e61c0Sahrens /* 352f65e61c0Sahrens * The embedded pointer table should end at the end of 353f65e61c0Sahrens * the block 354f65e61c0Sahrens */ 355f65e61c0Sahrens ASSERT3U((uintptr_t)&ZAP_EMBEDDED_PTRTBL_ENT(zap, 356f65e61c0Sahrens 1<<ZAP_EMBEDDED_PTRTBL_SHIFT(zap)) - 357f65e61c0Sahrens (uintptr_t)zap->zap_f.zap_phys, ==, 358f65e61c0Sahrens zap->zap_dbuf->db_size); 359fa9e4066Sahrens } 360fa9e4066Sahrens rw_exit(&zap->zap_rwlock); 361fa9e4066Sahrens return (zap); 362fa9e4066Sahrens } 363fa9e4066Sahrens 364fa9e4066Sahrens int 365fa9e4066Sahrens zap_lockdir(objset_t *os, uint64_t obj, dmu_tx_t *tx, 366c5f9e431Sahrens krw_t lti, boolean_t fatreader, boolean_t adding, zap_t **zapp) 367fa9e4066Sahrens { 368fa9e4066Sahrens zap_t *zap; 369fa9e4066Sahrens dmu_buf_t *db; 370fa9e4066Sahrens krw_t lt; 371fa9e4066Sahrens int err; 372fa9e4066Sahrens 373fa9e4066Sahrens *zapp = NULL; 374fa9e4066Sahrens 375ea8dc4b6Seschrock err = dmu_buf_hold(os, obj, 0, NULL, &db); 376ea8dc4b6Seschrock if (err) 377ea8dc4b6Seschrock return (err); 378fa9e4066Sahrens 379fa9e4066Sahrens #ifdef ZFS_DEBUG 380fa9e4066Sahrens { 381fa9e4066Sahrens dmu_object_info_t doi; 382fa9e4066Sahrens dmu_object_info_from_db(db, &doi); 383fa9e4066Sahrens ASSERT(dmu_ot[doi.doi_type].ot_byteswap == zap_byteswap); 384fa9e4066Sahrens } 385fa9e4066Sahrens #endif 386fa9e4066Sahrens 387fa9e4066Sahrens zap = dmu_buf_get_user(db); 388fa9e4066Sahrens if (zap == NULL) 389fa9e4066Sahrens zap = mzap_open(os, obj, db); 390fa9e4066Sahrens 391fa9e4066Sahrens /* 392fa9e4066Sahrens * We're checking zap_ismicro without the lock held, in order to 393fa9e4066Sahrens * tell what type of lock we want. Once we have some sort of 394fa9e4066Sahrens * lock, see if it really is the right type. In practice this 395fa9e4066Sahrens * can only be different if it was upgraded from micro to fat, 396fa9e4066Sahrens * and micro wanted WRITER but fat only needs READER. 397fa9e4066Sahrens */ 398fa9e4066Sahrens lt = (!zap->zap_ismicro && fatreader) ? RW_READER : lti; 399fa9e4066Sahrens rw_enter(&zap->zap_rwlock, lt); 400fa9e4066Sahrens if (lt != ((!zap->zap_ismicro && fatreader) ? RW_READER : lti)) { 401fa9e4066Sahrens /* it was upgraded, now we only need reader */ 402fa9e4066Sahrens ASSERT(lt == RW_WRITER); 403fa9e4066Sahrens ASSERT(RW_READER == 404fa9e4066Sahrens (!zap->zap_ismicro && fatreader) ? RW_READER : lti); 405fa9e4066Sahrens rw_downgrade(&zap->zap_rwlock); 406fa9e4066Sahrens lt = RW_READER; 407fa9e4066Sahrens } 408fa9e4066Sahrens 409fa9e4066Sahrens zap->zap_objset = os; 410fa9e4066Sahrens 411fa9e4066Sahrens if (lt == RW_WRITER) 412fa9e4066Sahrens dmu_buf_will_dirty(db, tx); 413fa9e4066Sahrens 414fa9e4066Sahrens ASSERT3P(zap->zap_dbuf, ==, db); 415fa9e4066Sahrens 416fa9e4066Sahrens ASSERT(!zap->zap_ismicro || 417fa9e4066Sahrens zap->zap_m.zap_num_entries <= zap->zap_m.zap_num_chunks); 418c5f9e431Sahrens if (zap->zap_ismicro && tx && adding && 419fa9e4066Sahrens zap->zap_m.zap_num_entries == zap->zap_m.zap_num_chunks) { 420fa9e4066Sahrens uint64_t newsz = db->db_size + SPA_MINBLOCKSIZE; 421fa9e4066Sahrens if (newsz > MZAP_MAX_BLKSZ) { 422fa9e4066Sahrens dprintf("upgrading obj %llu: num_entries=%u\n", 423fa9e4066Sahrens obj, zap->zap_m.zap_num_entries); 424fa9e4066Sahrens *zapp = zap; 425ad860c82Sbonwick return (mzap_upgrade(zapp, tx)); 426fa9e4066Sahrens } 427fa9e4066Sahrens err = dmu_object_set_blocksize(os, obj, newsz, 0, tx); 428fa9e4066Sahrens ASSERT3U(err, ==, 0); 429fa9e4066Sahrens zap->zap_m.zap_num_chunks = 430fa9e4066Sahrens db->db_size / MZAP_ENT_LEN - 1; 431fa9e4066Sahrens } 432fa9e4066Sahrens 433fa9e4066Sahrens *zapp = zap; 434fa9e4066Sahrens return (0); 435fa9e4066Sahrens } 436fa9e4066Sahrens 437fa9e4066Sahrens void 438fa9e4066Sahrens zap_unlockdir(zap_t *zap) 439fa9e4066Sahrens { 440fa9e4066Sahrens rw_exit(&zap->zap_rwlock); 441ea8dc4b6Seschrock dmu_buf_rele(zap->zap_dbuf, NULL); 442fa9e4066Sahrens } 443fa9e4066Sahrens 444ad860c82Sbonwick static int 445ad860c82Sbonwick mzap_upgrade(zap_t **zapp, dmu_tx_t *tx) 446fa9e4066Sahrens { 447fa9e4066Sahrens mzap_phys_t *mzp; 448fa9e4066Sahrens int i, sz, nchunks, err; 449ad860c82Sbonwick zap_t *zap = *zapp; 450fa9e4066Sahrens 451fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 452fa9e4066Sahrens 453fa9e4066Sahrens sz = zap->zap_dbuf->db_size; 454fa9e4066Sahrens mzp = kmem_alloc(sz, KM_SLEEP); 455fa9e4066Sahrens bcopy(zap->zap_dbuf->db_data, mzp, sz); 456fa9e4066Sahrens nchunks = zap->zap_m.zap_num_chunks; 457fa9e4066Sahrens 458fa9e4066Sahrens err = dmu_object_set_blocksize(zap->zap_objset, zap->zap_object, 459f65e61c0Sahrens 1ULL << fzap_default_block_shift, 0, tx); 460ad860c82Sbonwick if (err) { 461ad860c82Sbonwick kmem_free(mzp, sz); 462ad860c82Sbonwick return (err); 463ad860c82Sbonwick } 464fa9e4066Sahrens 465fa9e4066Sahrens dprintf("upgrading obj=%llu with %u chunks\n", 466fa9e4066Sahrens zap->zap_object, nchunks); 467da6c28aaSamw /* XXX destroy the avl later, so we can use the stored hash value */ 468fa9e4066Sahrens mze_destroy(zap); 469fa9e4066Sahrens 470fa9e4066Sahrens fzap_upgrade(zap, tx); 471fa9e4066Sahrens 472fa9e4066Sahrens for (i = 0; i < nchunks; i++) { 473fa9e4066Sahrens int err; 474fa9e4066Sahrens mzap_ent_phys_t *mze = &mzp->mz_chunk[i]; 475da6c28aaSamw zap_name_t *zn; 476fa9e4066Sahrens if (mze->mze_name[0] == 0) 477fa9e4066Sahrens continue; 478fa9e4066Sahrens dprintf("adding %s=%llu\n", 479fa9e4066Sahrens mze->mze_name, mze->mze_value); 480da6c28aaSamw zn = zap_name_alloc(zap, mze->mze_name, MT_EXACT); 481ad860c82Sbonwick err = fzap_add_cd(zn, 8, 1, &mze->mze_value, mze->mze_cd, tx); 482ad860c82Sbonwick zap = zn->zn_zap; /* fzap_add_cd() may change zap */ 483da6c28aaSamw zap_name_free(zn); 484ad860c82Sbonwick if (err) 485ad860c82Sbonwick break; 486fa9e4066Sahrens } 487fa9e4066Sahrens kmem_free(mzp, sz); 488ad860c82Sbonwick *zapp = zap; 489ad860c82Sbonwick return (err); 490fa9e4066Sahrens } 491fa9e4066Sahrens 492fa9e4066Sahrens static void 493da6c28aaSamw mzap_create_impl(objset_t *os, uint64_t obj, int normflags, dmu_tx_t *tx) 494fa9e4066Sahrens { 495fa9e4066Sahrens dmu_buf_t *db; 496fa9e4066Sahrens mzap_phys_t *zp; 497fa9e4066Sahrens 498ea8dc4b6Seschrock VERIFY(0 == dmu_buf_hold(os, obj, 0, FTAG, &db)); 499fa9e4066Sahrens 500fa9e4066Sahrens #ifdef ZFS_DEBUG 501fa9e4066Sahrens { 502fa9e4066Sahrens dmu_object_info_t doi; 503fa9e4066Sahrens dmu_object_info_from_db(db, &doi); 504fa9e4066Sahrens ASSERT(dmu_ot[doi.doi_type].ot_byteswap == zap_byteswap); 505fa9e4066Sahrens } 506fa9e4066Sahrens #endif 507fa9e4066Sahrens 508fa9e4066Sahrens dmu_buf_will_dirty(db, tx); 509fa9e4066Sahrens zp = db->db_data; 510fa9e4066Sahrens zp->mz_block_type = ZBT_MICRO; 511fa9e4066Sahrens zp->mz_salt = ((uintptr_t)db ^ (uintptr_t)tx ^ (obj << 1)) | 1ULL; 512da6c28aaSamw zp->mz_normflags = normflags; 513ea8dc4b6Seschrock dmu_buf_rele(db, FTAG); 514fa9e4066Sahrens } 515fa9e4066Sahrens 516fa9e4066Sahrens int 517fa9e4066Sahrens zap_create_claim(objset_t *os, uint64_t obj, dmu_object_type_t ot, 518fa9e4066Sahrens dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) 519da6c28aaSamw { 520da6c28aaSamw return (zap_create_claim_norm(os, obj, 521da6c28aaSamw 0, ot, bonustype, bonuslen, tx)); 522da6c28aaSamw } 523da6c28aaSamw 524da6c28aaSamw int 525da6c28aaSamw zap_create_claim_norm(objset_t *os, uint64_t obj, int normflags, 526da6c28aaSamw dmu_object_type_t ot, 527da6c28aaSamw dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) 528fa9e4066Sahrens { 529fa9e4066Sahrens int err; 530fa9e4066Sahrens 531fa9e4066Sahrens err = dmu_object_claim(os, obj, ot, 0, bonustype, bonuslen, tx); 532fa9e4066Sahrens if (err != 0) 533fa9e4066Sahrens return (err); 534da6c28aaSamw mzap_create_impl(os, obj, normflags, tx); 535fa9e4066Sahrens return (0); 536fa9e4066Sahrens } 537fa9e4066Sahrens 538fa9e4066Sahrens uint64_t 539fa9e4066Sahrens zap_create(objset_t *os, dmu_object_type_t ot, 540fa9e4066Sahrens dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) 541da6c28aaSamw { 542da6c28aaSamw return (zap_create_norm(os, 0, ot, bonustype, bonuslen, tx)); 543da6c28aaSamw } 544da6c28aaSamw 545da6c28aaSamw uint64_t 546da6c28aaSamw zap_create_norm(objset_t *os, int normflags, dmu_object_type_t ot, 547da6c28aaSamw dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) 548fa9e4066Sahrens { 549fa9e4066Sahrens uint64_t obj = dmu_object_alloc(os, ot, 0, bonustype, bonuslen, tx); 550fa9e4066Sahrens 551da6c28aaSamw mzap_create_impl(os, obj, normflags, tx); 552fa9e4066Sahrens return (obj); 553fa9e4066Sahrens } 554fa9e4066Sahrens 555fa9e4066Sahrens int 556fa9e4066Sahrens zap_destroy(objset_t *os, uint64_t zapobj, dmu_tx_t *tx) 557fa9e4066Sahrens { 558fa9e4066Sahrens /* 559fa9e4066Sahrens * dmu_object_free will free the object number and free the 560fa9e4066Sahrens * data. Freeing the data will cause our pageout function to be 561fa9e4066Sahrens * called, which will destroy our data (zap_leaf_t's and zap_t). 562fa9e4066Sahrens */ 563fa9e4066Sahrens 564fa9e4066Sahrens return (dmu_object_free(os, zapobj, tx)); 565fa9e4066Sahrens } 566fa9e4066Sahrens 567fa9e4066Sahrens _NOTE(ARGSUSED(0)) 568fa9e4066Sahrens void 569455d5089Sahrens zap_evict(dmu_buf_t *db, void *vzap) 570fa9e4066Sahrens { 571455d5089Sahrens zap_t *zap = vzap; 572fa9e4066Sahrens 573fa9e4066Sahrens rw_destroy(&zap->zap_rwlock); 574fa9e4066Sahrens 575f65e61c0Sahrens if (zap->zap_ismicro) 576fa9e4066Sahrens mze_destroy(zap); 577c25056deSgw else 578c25056deSgw mutex_destroy(&zap->zap_f.zap_num_entries_mtx); 579fa9e4066Sahrens 580fa9e4066Sahrens kmem_free(zap, sizeof (zap_t)); 581fa9e4066Sahrens } 582fa9e4066Sahrens 583fa9e4066Sahrens int 584fa9e4066Sahrens zap_count(objset_t *os, uint64_t zapobj, uint64_t *count) 585fa9e4066Sahrens { 586fa9e4066Sahrens zap_t *zap; 587fa9e4066Sahrens int err; 588fa9e4066Sahrens 589c5f9e431Sahrens err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); 590fa9e4066Sahrens if (err) 591fa9e4066Sahrens return (err); 592fa9e4066Sahrens if (!zap->zap_ismicro) { 593fa9e4066Sahrens err = fzap_count(zap, count); 594fa9e4066Sahrens } else { 595fa9e4066Sahrens *count = zap->zap_m.zap_num_entries; 596fa9e4066Sahrens } 597fa9e4066Sahrens zap_unlockdir(zap); 598fa9e4066Sahrens return (err); 599fa9e4066Sahrens } 600fa9e4066Sahrens 601fa9e4066Sahrens /* 602da6c28aaSamw * zn may be NULL; if not specified, it will be computed if needed. 603da6c28aaSamw * See also the comment above zap_entry_normalization_conflict(). 604da6c28aaSamw */ 605da6c28aaSamw static boolean_t 606da6c28aaSamw mzap_normalization_conflict(zap_t *zap, zap_name_t *zn, mzap_ent_t *mze) 607da6c28aaSamw { 608da6c28aaSamw mzap_ent_t *other; 609da6c28aaSamw int direction = AVL_BEFORE; 610da6c28aaSamw boolean_t allocdzn = B_FALSE; 611da6c28aaSamw 612da6c28aaSamw if (zap->zap_normflags == 0) 613da6c28aaSamw return (B_FALSE); 614da6c28aaSamw 615da6c28aaSamw again: 616da6c28aaSamw for (other = avl_walk(&zap->zap_m.zap_avl, mze, direction); 617da6c28aaSamw other && other->mze_hash == mze->mze_hash; 618da6c28aaSamw other = avl_walk(&zap->zap_m.zap_avl, other, direction)) { 619da6c28aaSamw 620da6c28aaSamw if (zn == NULL) { 621da6c28aaSamw zn = zap_name_alloc(zap, mze->mze_phys.mze_name, 622da6c28aaSamw MT_FIRST); 623da6c28aaSamw allocdzn = B_TRUE; 624da6c28aaSamw } 625da6c28aaSamw if (zap_match(zn, other->mze_phys.mze_name)) { 626da6c28aaSamw if (allocdzn) 627da6c28aaSamw zap_name_free(zn); 628da6c28aaSamw return (B_TRUE); 629da6c28aaSamw } 630da6c28aaSamw } 631da6c28aaSamw 632da6c28aaSamw if (direction == AVL_BEFORE) { 633da6c28aaSamw direction = AVL_AFTER; 634da6c28aaSamw goto again; 635da6c28aaSamw } 636da6c28aaSamw 637da6c28aaSamw if (allocdzn) 638da6c28aaSamw zap_name_free(zn); 639da6c28aaSamw return (B_FALSE); 640da6c28aaSamw } 641da6c28aaSamw 642da6c28aaSamw /* 643da6c28aaSamw * Routines for manipulating attributes. 644fa9e4066Sahrens */ 645fa9e4066Sahrens 646fa9e4066Sahrens int 647fa9e4066Sahrens zap_lookup(objset_t *os, uint64_t zapobj, const char *name, 648fa9e4066Sahrens uint64_t integer_size, uint64_t num_integers, void *buf) 649da6c28aaSamw { 650da6c28aaSamw return (zap_lookup_norm(os, zapobj, name, integer_size, 651da6c28aaSamw num_integers, buf, MT_EXACT, NULL, 0, NULL)); 652da6c28aaSamw } 653da6c28aaSamw 654da6c28aaSamw int 655da6c28aaSamw zap_lookup_norm(objset_t *os, uint64_t zapobj, const char *name, 656da6c28aaSamw uint64_t integer_size, uint64_t num_integers, void *buf, 657da6c28aaSamw matchtype_t mt, char *realname, int rn_len, 658da6c28aaSamw boolean_t *ncp) 659fa9e4066Sahrens { 660fa9e4066Sahrens zap_t *zap; 661fa9e4066Sahrens int err; 662fa9e4066Sahrens mzap_ent_t *mze; 663da6c28aaSamw zap_name_t *zn; 664fa9e4066Sahrens 665c5f9e431Sahrens err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); 666fa9e4066Sahrens if (err) 667fa9e4066Sahrens return (err); 668da6c28aaSamw zn = zap_name_alloc(zap, name, mt); 669da6c28aaSamw if (zn == NULL) { 670da6c28aaSamw zap_unlockdir(zap); 671da6c28aaSamw return (ENOTSUP); 672da6c28aaSamw } 673da6c28aaSamw 674fa9e4066Sahrens if (!zap->zap_ismicro) { 675da6c28aaSamw err = fzap_lookup(zn, integer_size, num_integers, buf, 676da6c28aaSamw realname, rn_len, ncp); 677fa9e4066Sahrens } else { 678da6c28aaSamw mze = mze_find(zn); 679fa9e4066Sahrens if (mze == NULL) { 680fa9e4066Sahrens err = ENOENT; 681fa9e4066Sahrens } else { 682da6c28aaSamw if (num_integers < 1) { 683fa9e4066Sahrens err = EOVERFLOW; 684da6c28aaSamw } else if (integer_size != 8) { 685fa9e4066Sahrens err = EINVAL; 686da6c28aaSamw } else { 687fa9e4066Sahrens *(uint64_t *)buf = mze->mze_phys.mze_value; 688da6c28aaSamw (void) strlcpy(realname, 689da6c28aaSamw mze->mze_phys.mze_name, rn_len); 690da6c28aaSamw if (ncp) { 691da6c28aaSamw *ncp = mzap_normalization_conflict(zap, 692da6c28aaSamw zn, mze); 693da6c28aaSamw } 694da6c28aaSamw } 695fa9e4066Sahrens } 696fa9e4066Sahrens } 697da6c28aaSamw zap_name_free(zn); 698fa9e4066Sahrens zap_unlockdir(zap); 699fa9e4066Sahrens return (err); 700fa9e4066Sahrens } 701fa9e4066Sahrens 702fa9e4066Sahrens int 703fa9e4066Sahrens zap_length(objset_t *os, uint64_t zapobj, const char *name, 704fa9e4066Sahrens uint64_t *integer_size, uint64_t *num_integers) 705fa9e4066Sahrens { 706fa9e4066Sahrens zap_t *zap; 707fa9e4066Sahrens int err; 708fa9e4066Sahrens mzap_ent_t *mze; 709da6c28aaSamw zap_name_t *zn; 710fa9e4066Sahrens 711c5f9e431Sahrens err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); 712fa9e4066Sahrens if (err) 713fa9e4066Sahrens return (err); 714da6c28aaSamw zn = zap_name_alloc(zap, name, MT_EXACT); 715da6c28aaSamw if (zn == NULL) { 716da6c28aaSamw zap_unlockdir(zap); 717da6c28aaSamw return (ENOTSUP); 718da6c28aaSamw } 719fa9e4066Sahrens if (!zap->zap_ismicro) { 720da6c28aaSamw err = fzap_length(zn, integer_size, num_integers); 721fa9e4066Sahrens } else { 722da6c28aaSamw mze = mze_find(zn); 723fa9e4066Sahrens if (mze == NULL) { 724fa9e4066Sahrens err = ENOENT; 725fa9e4066Sahrens } else { 726fa9e4066Sahrens if (integer_size) 727fa9e4066Sahrens *integer_size = 8; 728fa9e4066Sahrens if (num_integers) 729fa9e4066Sahrens *num_integers = 1; 730fa9e4066Sahrens } 731fa9e4066Sahrens } 732da6c28aaSamw zap_name_free(zn); 733fa9e4066Sahrens zap_unlockdir(zap); 734fa9e4066Sahrens return (err); 735fa9e4066Sahrens } 736fa9e4066Sahrens 737fa9e4066Sahrens static void 738da6c28aaSamw mzap_addent(zap_name_t *zn, uint64_t value) 739fa9e4066Sahrens { 740fa9e4066Sahrens int i; 741da6c28aaSamw zap_t *zap = zn->zn_zap; 742fa9e4066Sahrens int start = zap->zap_m.zap_alloc_next; 743fa9e4066Sahrens uint32_t cd; 744fa9e4066Sahrens 745da6c28aaSamw dprintf("obj=%llu %s=%llu\n", zap->zap_object, 746da6c28aaSamw zn->zn_name_orij, value); 747fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 748fa9e4066Sahrens 749fa9e4066Sahrens #ifdef ZFS_DEBUG 750fa9e4066Sahrens for (i = 0; i < zap->zap_m.zap_num_chunks; i++) { 751fa9e4066Sahrens mzap_ent_phys_t *mze = &zap->zap_m.zap_phys->mz_chunk[i]; 752da6c28aaSamw ASSERT(strcmp(zn->zn_name_orij, mze->mze_name) != 0); 753fa9e4066Sahrens } 754fa9e4066Sahrens #endif 755fa9e4066Sahrens 756da6c28aaSamw cd = mze_find_unused_cd(zap, zn->zn_hash); 757fa9e4066Sahrens /* given the limited size of the microzap, this can't happen */ 758fa9e4066Sahrens ASSERT(cd != ZAP_MAXCD); 759fa9e4066Sahrens 760fa9e4066Sahrens again: 761fa9e4066Sahrens for (i = start; i < zap->zap_m.zap_num_chunks; i++) { 762fa9e4066Sahrens mzap_ent_phys_t *mze = &zap->zap_m.zap_phys->mz_chunk[i]; 763fa9e4066Sahrens if (mze->mze_name[0] == 0) { 764fa9e4066Sahrens mze->mze_value = value; 765fa9e4066Sahrens mze->mze_cd = cd; 766da6c28aaSamw (void) strcpy(mze->mze_name, zn->zn_name_orij); 767fa9e4066Sahrens zap->zap_m.zap_num_entries++; 768fa9e4066Sahrens zap->zap_m.zap_alloc_next = i+1; 769fa9e4066Sahrens if (zap->zap_m.zap_alloc_next == 770fa9e4066Sahrens zap->zap_m.zap_num_chunks) 771fa9e4066Sahrens zap->zap_m.zap_alloc_next = 0; 772da6c28aaSamw mze_insert(zap, i, zn->zn_hash, mze); 773fa9e4066Sahrens return; 774fa9e4066Sahrens } 775fa9e4066Sahrens } 776fa9e4066Sahrens if (start != 0) { 777fa9e4066Sahrens start = 0; 778fa9e4066Sahrens goto again; 779fa9e4066Sahrens } 780fa9e4066Sahrens ASSERT(!"out of entries!"); 781fa9e4066Sahrens } 782fa9e4066Sahrens 783fa9e4066Sahrens int 784fa9e4066Sahrens zap_add(objset_t *os, uint64_t zapobj, const char *name, 785fa9e4066Sahrens int integer_size, uint64_t num_integers, 786fa9e4066Sahrens const void *val, dmu_tx_t *tx) 787fa9e4066Sahrens { 788fa9e4066Sahrens zap_t *zap; 789fa9e4066Sahrens int err; 790fa9e4066Sahrens mzap_ent_t *mze; 791fa9e4066Sahrens const uint64_t *intval = val; 792da6c28aaSamw zap_name_t *zn; 793fa9e4066Sahrens 794c5f9e431Sahrens err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, &zap); 795fa9e4066Sahrens if (err) 796fa9e4066Sahrens return (err); 797da6c28aaSamw zn = zap_name_alloc(zap, name, MT_EXACT); 798da6c28aaSamw if (zn == NULL) { 799da6c28aaSamw zap_unlockdir(zap); 800da6c28aaSamw return (ENOTSUP); 801da6c28aaSamw } 802fa9e4066Sahrens if (!zap->zap_ismicro) { 803da6c28aaSamw err = fzap_add(zn, integer_size, num_integers, val, tx); 804ad860c82Sbonwick zap = zn->zn_zap; /* fzap_add() may change zap */ 805fa9e4066Sahrens } else if (integer_size != 8 || num_integers != 1 || 806fa9e4066Sahrens strlen(name) >= MZAP_NAME_LEN) { 807fa9e4066Sahrens dprintf("upgrading obj %llu: intsz=%u numint=%llu name=%s\n", 808fa9e4066Sahrens zapobj, integer_size, num_integers, name); 809ad860c82Sbonwick err = mzap_upgrade(&zn->zn_zap, tx); 810ad860c82Sbonwick if (err == 0) 811ad860c82Sbonwick err = fzap_add(zn, integer_size, num_integers, val, tx); 812ad860c82Sbonwick zap = zn->zn_zap; /* fzap_add() may change zap */ 813fa9e4066Sahrens } else { 814da6c28aaSamw mze = mze_find(zn); 815fa9e4066Sahrens if (mze != NULL) { 816fa9e4066Sahrens err = EEXIST; 817fa9e4066Sahrens } else { 818da6c28aaSamw mzap_addent(zn, *intval); 819fa9e4066Sahrens } 820fa9e4066Sahrens } 821ad860c82Sbonwick ASSERT(zap == zn->zn_zap); 822da6c28aaSamw zap_name_free(zn); 823ad860c82Sbonwick if (zap != NULL) /* may be NULL if fzap_add() failed */ 824ad860c82Sbonwick zap_unlockdir(zap); 825fa9e4066Sahrens return (err); 826fa9e4066Sahrens } 827fa9e4066Sahrens 828fa9e4066Sahrens int 829fa9e4066Sahrens zap_update(objset_t *os, uint64_t zapobj, const char *name, 830fa9e4066Sahrens int integer_size, uint64_t num_integers, const void *val, dmu_tx_t *tx) 831fa9e4066Sahrens { 832fa9e4066Sahrens zap_t *zap; 833fa9e4066Sahrens mzap_ent_t *mze; 834fa9e4066Sahrens const uint64_t *intval = val; 835da6c28aaSamw zap_name_t *zn; 836fa9e4066Sahrens int err; 837fa9e4066Sahrens 838c5f9e431Sahrens err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, &zap); 839fa9e4066Sahrens if (err) 840fa9e4066Sahrens return (err); 841da6c28aaSamw zn = zap_name_alloc(zap, name, MT_EXACT); 842da6c28aaSamw if (zn == NULL) { 843da6c28aaSamw zap_unlockdir(zap); 844da6c28aaSamw return (ENOTSUP); 845da6c28aaSamw } 846fa9e4066Sahrens if (!zap->zap_ismicro) { 847da6c28aaSamw err = fzap_update(zn, integer_size, num_integers, val, tx); 848ad860c82Sbonwick zap = zn->zn_zap; /* fzap_update() may change zap */ 849fa9e4066Sahrens } else if (integer_size != 8 || num_integers != 1 || 850fa9e4066Sahrens strlen(name) >= MZAP_NAME_LEN) { 851fa9e4066Sahrens dprintf("upgrading obj %llu: intsz=%u numint=%llu name=%s\n", 852fa9e4066Sahrens zapobj, integer_size, num_integers, name); 853ad860c82Sbonwick err = mzap_upgrade(&zn->zn_zap, tx); 854ad860c82Sbonwick if (err == 0) 855ad860c82Sbonwick err = fzap_update(zn, integer_size, num_integers, 856ad860c82Sbonwick val, tx); 857ad860c82Sbonwick zap = zn->zn_zap; /* fzap_update() may change zap */ 858fa9e4066Sahrens } else { 859da6c28aaSamw mze = mze_find(zn); 860fa9e4066Sahrens if (mze != NULL) { 861fa9e4066Sahrens mze->mze_phys.mze_value = *intval; 862fa9e4066Sahrens zap->zap_m.zap_phys->mz_chunk 863fa9e4066Sahrens [mze->mze_chunkid].mze_value = *intval; 864fa9e4066Sahrens } else { 865da6c28aaSamw mzap_addent(zn, *intval); 866fa9e4066Sahrens } 867fa9e4066Sahrens } 868ad860c82Sbonwick ASSERT(zap == zn->zn_zap); 869da6c28aaSamw zap_name_free(zn); 870ad860c82Sbonwick if (zap != NULL) /* may be NULL if fzap_upgrade() failed */ 871ad860c82Sbonwick zap_unlockdir(zap); 872455d5089Sahrens return (err); 873fa9e4066Sahrens } 874fa9e4066Sahrens 875fa9e4066Sahrens int 876fa9e4066Sahrens zap_remove(objset_t *os, uint64_t zapobj, const char *name, dmu_tx_t *tx) 877da6c28aaSamw { 878da6c28aaSamw return (zap_remove_norm(os, zapobj, name, MT_EXACT, tx)); 879da6c28aaSamw } 880da6c28aaSamw 881da6c28aaSamw int 882da6c28aaSamw zap_remove_norm(objset_t *os, uint64_t zapobj, const char *name, 883da6c28aaSamw matchtype_t mt, dmu_tx_t *tx) 884fa9e4066Sahrens { 885fa9e4066Sahrens zap_t *zap; 886fa9e4066Sahrens int err; 887fa9e4066Sahrens mzap_ent_t *mze; 888da6c28aaSamw zap_name_t *zn; 889fa9e4066Sahrens 890c5f9e431Sahrens err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, FALSE, &zap); 891fa9e4066Sahrens if (err) 892fa9e4066Sahrens return (err); 893da6c28aaSamw zn = zap_name_alloc(zap, name, mt); 894da6c28aaSamw if (zn == NULL) { 895da6c28aaSamw zap_unlockdir(zap); 896da6c28aaSamw return (ENOTSUP); 897da6c28aaSamw } 898fa9e4066Sahrens if (!zap->zap_ismicro) { 899da6c28aaSamw err = fzap_remove(zn, tx); 900fa9e4066Sahrens } else { 901da6c28aaSamw mze = mze_find(zn); 902fa9e4066Sahrens if (mze == NULL) { 903fa9e4066Sahrens err = ENOENT; 904fa9e4066Sahrens } else { 905fa9e4066Sahrens zap->zap_m.zap_num_entries--; 906fa9e4066Sahrens bzero(&zap->zap_m.zap_phys->mz_chunk[mze->mze_chunkid], 907fa9e4066Sahrens sizeof (mzap_ent_phys_t)); 908fa9e4066Sahrens mze_remove(zap, mze); 909fa9e4066Sahrens } 910fa9e4066Sahrens } 911da6c28aaSamw zap_name_free(zn); 912fa9e4066Sahrens zap_unlockdir(zap); 913fa9e4066Sahrens return (err); 914fa9e4066Sahrens } 915fa9e4066Sahrens 916fa9e4066Sahrens /* 917fa9e4066Sahrens * Routines for iterating over the attributes. 918fa9e4066Sahrens */ 919fa9e4066Sahrens 920fa9e4066Sahrens /* 921fa9e4066Sahrens * We want to keep the high 32 bits of the cursor zero if we can, so 922fa9e4066Sahrens * that 32-bit programs can access this. So use a small hash value so 923fa9e4066Sahrens * we can fit 4 bits of cd into the 32-bit cursor. 924fa9e4066Sahrens * 925fa9e4066Sahrens * [ 4 zero bits | 32-bit collision differentiator | 28-bit hash value ] 926fa9e4066Sahrens */ 927fa9e4066Sahrens void 928fa9e4066Sahrens zap_cursor_init_serialized(zap_cursor_t *zc, objset_t *os, uint64_t zapobj, 929fa9e4066Sahrens uint64_t serialized) 930fa9e4066Sahrens { 931fa9e4066Sahrens zc->zc_objset = os; 93287e5029aSahrens zc->zc_zap = NULL; 93387e5029aSahrens zc->zc_leaf = NULL; 934fa9e4066Sahrens zc->zc_zapobj = zapobj; 935fa9e4066Sahrens if (serialized == -1ULL) { 936fa9e4066Sahrens zc->zc_hash = -1ULL; 937fa9e4066Sahrens zc->zc_cd = 0; 938fa9e4066Sahrens } else { 939fa9e4066Sahrens zc->zc_hash = serialized << (64-ZAP_HASHBITS); 940fa9e4066Sahrens zc->zc_cd = serialized >> ZAP_HASHBITS; 941fa9e4066Sahrens if (zc->zc_cd >= ZAP_MAXCD) /* corrupt serialized */ 942fa9e4066Sahrens zc->zc_cd = 0; 943fa9e4066Sahrens } 944fa9e4066Sahrens } 945fa9e4066Sahrens 94687e5029aSahrens void 94787e5029aSahrens zap_cursor_init(zap_cursor_t *zc, objset_t *os, uint64_t zapobj) 94887e5029aSahrens { 94987e5029aSahrens zap_cursor_init_serialized(zc, os, zapobj, 0); 95087e5029aSahrens } 95187e5029aSahrens 95287e5029aSahrens void 95387e5029aSahrens zap_cursor_fini(zap_cursor_t *zc) 95487e5029aSahrens { 95587e5029aSahrens if (zc->zc_zap) { 95687e5029aSahrens rw_enter(&zc->zc_zap->zap_rwlock, RW_READER); 95787e5029aSahrens zap_unlockdir(zc->zc_zap); 95887e5029aSahrens zc->zc_zap = NULL; 95987e5029aSahrens } 96087e5029aSahrens if (zc->zc_leaf) { 96187e5029aSahrens rw_enter(&zc->zc_leaf->l_rwlock, RW_READER); 96287e5029aSahrens zap_put_leaf(zc->zc_leaf); 96387e5029aSahrens zc->zc_leaf = NULL; 96487e5029aSahrens } 96587e5029aSahrens zc->zc_objset = NULL; 96687e5029aSahrens } 96787e5029aSahrens 968fa9e4066Sahrens uint64_t 969fa9e4066Sahrens zap_cursor_serialize(zap_cursor_t *zc) 970fa9e4066Sahrens { 971fa9e4066Sahrens if (zc->zc_hash == -1ULL) 972fa9e4066Sahrens return (-1ULL); 973fa9e4066Sahrens ASSERT((zc->zc_hash & (ZAP_MAXCD-1)) == 0); 974fa9e4066Sahrens ASSERT(zc->zc_cd < ZAP_MAXCD); 975fa9e4066Sahrens return ((zc->zc_hash >> (64-ZAP_HASHBITS)) | 976fa9e4066Sahrens ((uint64_t)zc->zc_cd << ZAP_HASHBITS)); 977fa9e4066Sahrens } 978fa9e4066Sahrens 979fa9e4066Sahrens int 980fa9e4066Sahrens zap_cursor_retrieve(zap_cursor_t *zc, zap_attribute_t *za) 981fa9e4066Sahrens { 982fa9e4066Sahrens int err; 983fa9e4066Sahrens avl_index_t idx; 984fa9e4066Sahrens mzap_ent_t mze_tofind; 985fa9e4066Sahrens mzap_ent_t *mze; 986fa9e4066Sahrens 987fa9e4066Sahrens if (zc->zc_hash == -1ULL) 988fa9e4066Sahrens return (ENOENT); 989fa9e4066Sahrens 99087e5029aSahrens if (zc->zc_zap == NULL) { 99187e5029aSahrens err = zap_lockdir(zc->zc_objset, zc->zc_zapobj, NULL, 992c5f9e431Sahrens RW_READER, TRUE, FALSE, &zc->zc_zap); 99387e5029aSahrens if (err) 99487e5029aSahrens return (err); 99587e5029aSahrens } else { 99687e5029aSahrens rw_enter(&zc->zc_zap->zap_rwlock, RW_READER); 99787e5029aSahrens } 99887e5029aSahrens if (!zc->zc_zap->zap_ismicro) { 99987e5029aSahrens err = fzap_cursor_retrieve(zc->zc_zap, zc, za); 1000fa9e4066Sahrens } else { 1001fa9e4066Sahrens err = ENOENT; 1002fa9e4066Sahrens 1003fa9e4066Sahrens mze_tofind.mze_hash = zc->zc_hash; 1004fa9e4066Sahrens mze_tofind.mze_phys.mze_cd = zc->zc_cd; 1005fa9e4066Sahrens 100687e5029aSahrens mze = avl_find(&zc->zc_zap->zap_m.zap_avl, &mze_tofind, &idx); 100787e5029aSahrens if (mze == NULL) { 100887e5029aSahrens mze = avl_nearest(&zc->zc_zap->zap_m.zap_avl, 100987e5029aSahrens idx, AVL_AFTER); 101087e5029aSahrens } 1011fa9e4066Sahrens if (mze) { 1012da6c28aaSamw ASSERT(0 == bcmp(&mze->mze_phys, 1013da6c28aaSamw &zc->zc_zap->zap_m.zap_phys->mz_chunk 1014da6c28aaSamw [mze->mze_chunkid], sizeof (mze->mze_phys))); 1015da6c28aaSamw 1016da6c28aaSamw za->za_normalization_conflict = 1017da6c28aaSamw mzap_normalization_conflict(zc->zc_zap, NULL, mze); 1018fa9e4066Sahrens za->za_integer_length = 8; 1019fa9e4066Sahrens za->za_num_integers = 1; 1020fa9e4066Sahrens za->za_first_integer = mze->mze_phys.mze_value; 1021fa9e4066Sahrens (void) strcpy(za->za_name, mze->mze_phys.mze_name); 1022fa9e4066Sahrens zc->zc_hash = mze->mze_hash; 1023fa9e4066Sahrens zc->zc_cd = mze->mze_phys.mze_cd; 1024fa9e4066Sahrens err = 0; 1025fa9e4066Sahrens } else { 1026fa9e4066Sahrens zc->zc_hash = -1ULL; 1027fa9e4066Sahrens } 1028fa9e4066Sahrens } 102987e5029aSahrens rw_exit(&zc->zc_zap->zap_rwlock); 1030fa9e4066Sahrens return (err); 1031fa9e4066Sahrens } 1032fa9e4066Sahrens 1033fa9e4066Sahrens void 1034fa9e4066Sahrens zap_cursor_advance(zap_cursor_t *zc) 1035fa9e4066Sahrens { 1036fa9e4066Sahrens if (zc->zc_hash == -1ULL) 1037fa9e4066Sahrens return; 1038fa9e4066Sahrens zc->zc_cd++; 1039fa9e4066Sahrens if (zc->zc_cd >= ZAP_MAXCD) { 1040fa9e4066Sahrens zc->zc_cd = 0; 1041fa9e4066Sahrens zc->zc_hash += 1ULL<<(64-ZAP_HASHBITS); 1042fa9e4066Sahrens if (zc->zc_hash == 0) /* EOF */ 1043fa9e4066Sahrens zc->zc_hash = -1ULL; 1044fa9e4066Sahrens } 1045fa9e4066Sahrens } 1046fa9e4066Sahrens 1047fa9e4066Sahrens int 1048fa9e4066Sahrens zap_get_stats(objset_t *os, uint64_t zapobj, zap_stats_t *zs) 1049fa9e4066Sahrens { 1050fa9e4066Sahrens int err; 1051fa9e4066Sahrens zap_t *zap; 1052fa9e4066Sahrens 1053c5f9e431Sahrens err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); 1054fa9e4066Sahrens if (err) 1055fa9e4066Sahrens return (err); 1056fa9e4066Sahrens 1057fa9e4066Sahrens bzero(zs, sizeof (zap_stats_t)); 1058fa9e4066Sahrens 1059fa9e4066Sahrens if (zap->zap_ismicro) { 1060fa9e4066Sahrens zs->zs_blocksize = zap->zap_dbuf->db_size; 1061fa9e4066Sahrens zs->zs_num_entries = zap->zap_m.zap_num_entries; 1062fa9e4066Sahrens zs->zs_num_blocks = 1; 1063fa9e4066Sahrens } else { 1064fa9e4066Sahrens fzap_get_stats(zap, zs); 1065fa9e4066Sahrens } 1066fa9e4066Sahrens zap_unlockdir(zap); 1067fa9e4066Sahrens return (0); 1068fa9e4066Sahrens } 1069