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 /* 2247cb52daSJeff Bonwick * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 23*bf16b11eSMatthew Ahrens * Copyright (c) 2011, 2014 by Delphix. All rights reserved. 24fa9e4066Sahrens */ 25fa9e4066Sahrens 26b24ab676SJeff Bonwick #include <sys/zio.h> 27fa9e4066Sahrens #include <sys/spa.h> 28fa9e4066Sahrens #include <sys/dmu.h> 29fa9e4066Sahrens #include <sys/zfs_context.h> 30fa9e4066Sahrens #include <sys/zap.h> 31ea8dc4b6Seschrock #include <sys/refcount.h> 32fa9e4066Sahrens #include <sys/zap_impl.h> 3387e5029aSahrens #include <sys/zap_leaf.h> 34fa9e4066Sahrens #include <sys/avl.h> 353f9d6ad7SLin Ling #include <sys/arc.h> 36de8267e0Stimh 37de8267e0Stimh #ifdef _KERNEL 38de8267e0Stimh #include <sys/sunddi.h> 39de8267e0Stimh #endif 40fa9e4066Sahrens 41b24ab676SJeff Bonwick static int mzap_upgrade(zap_t **zapp, dmu_tx_t *tx, zap_flags_t flags); 42fa9e4066Sahrens 43b24ab676SJeff Bonwick uint64_t 44b24ab676SJeff Bonwick zap_getflags(zap_t *zap) 45b24ab676SJeff Bonwick { 46b24ab676SJeff Bonwick if (zap->zap_ismicro) 47b24ab676SJeff Bonwick return (0); 48b24ab676SJeff Bonwick return (zap->zap_u.zap_fat.zap_phys->zap_flags); 49b24ab676SJeff Bonwick } 50b24ab676SJeff Bonwick 51b24ab676SJeff Bonwick int 52b24ab676SJeff Bonwick zap_hashbits(zap_t *zap) 53b24ab676SJeff Bonwick { 54b24ab676SJeff Bonwick if (zap_getflags(zap) & ZAP_FLAG_HASH64) 55b24ab676SJeff Bonwick return (48); 56b24ab676SJeff Bonwick else 57b24ab676SJeff Bonwick return (28); 58b24ab676SJeff Bonwick } 59b24ab676SJeff Bonwick 60b24ab676SJeff Bonwick uint32_t 61b24ab676SJeff Bonwick zap_maxcd(zap_t *zap) 62b24ab676SJeff Bonwick { 63b24ab676SJeff Bonwick if (zap_getflags(zap) & ZAP_FLAG_HASH64) 64b24ab676SJeff Bonwick return ((1<<16)-1); 65b24ab676SJeff Bonwick else 66b24ab676SJeff Bonwick return (-1U); 67b24ab676SJeff Bonwick } 68fa9e4066Sahrens 69da6c28aaSamw static uint64_t 70b24ab676SJeff Bonwick zap_hash(zap_name_t *zn) 71da6c28aaSamw { 72b24ab676SJeff Bonwick zap_t *zap = zn->zn_zap; 73b24ab676SJeff Bonwick uint64_t h = 0; 74da6c28aaSamw 75b24ab676SJeff Bonwick if (zap_getflags(zap) & ZAP_FLAG_PRE_HASHED_KEY) { 76b24ab676SJeff Bonwick ASSERT(zap_getflags(zap) & ZAP_FLAG_UINT64_KEY); 77b24ab676SJeff Bonwick h = *(uint64_t *)zn->zn_key_orig; 78b24ab676SJeff Bonwick } else { 79b24ab676SJeff Bonwick h = zap->zap_salt; 80b24ab676SJeff Bonwick ASSERT(h != 0); 81b24ab676SJeff Bonwick ASSERT(zfs_crc64_table[128] == ZFS_CRC64_POLY); 82b24ab676SJeff Bonwick 83486ae710SMatthew Ahrens if (zap_getflags(zap) & ZAP_FLAG_UINT64_KEY) { 84486ae710SMatthew Ahrens int i; 85486ae710SMatthew Ahrens const uint64_t *wp = zn->zn_key_norm; 86486ae710SMatthew Ahrens 87486ae710SMatthew Ahrens ASSERT(zn->zn_key_intlen == 8); 88486ae710SMatthew Ahrens for (i = 0; i < zn->zn_key_norm_numints; wp++, i++) { 89486ae710SMatthew Ahrens int j; 90486ae710SMatthew Ahrens uint64_t word = *wp; 91486ae710SMatthew Ahrens 92486ae710SMatthew Ahrens for (j = 0; j < zn->zn_key_intlen; j++) { 93486ae710SMatthew Ahrens h = (h >> 8) ^ 94486ae710SMatthew Ahrens zfs_crc64_table[(h ^ word) & 0xFF]; 95486ae710SMatthew Ahrens word >>= NBBY; 96486ae710SMatthew Ahrens } 97486ae710SMatthew Ahrens } 98486ae710SMatthew Ahrens } else { 99486ae710SMatthew Ahrens int i, len; 100486ae710SMatthew Ahrens const uint8_t *cp = zn->zn_key_norm; 101486ae710SMatthew Ahrens 102486ae710SMatthew Ahrens /* 103486ae710SMatthew Ahrens * We previously stored the terminating null on 104486ae710SMatthew Ahrens * disk, but didn't hash it, so we need to 105486ae710SMatthew Ahrens * continue to not hash it. (The 106486ae710SMatthew Ahrens * zn_key_*_numints includes the terminating 107486ae710SMatthew Ahrens * null for non-binary keys.) 108486ae710SMatthew Ahrens */ 109486ae710SMatthew Ahrens len = zn->zn_key_norm_numints - 1; 110486ae710SMatthew Ahrens 111486ae710SMatthew Ahrens ASSERT(zn->zn_key_intlen == 1); 112486ae710SMatthew Ahrens for (i = 0; i < len; cp++, i++) { 113486ae710SMatthew Ahrens h = (h >> 8) ^ 114486ae710SMatthew Ahrens zfs_crc64_table[(h ^ *cp) & 0xFF]; 115486ae710SMatthew Ahrens } 116486ae710SMatthew Ahrens } 117b24ab676SJeff Bonwick } 118da6c28aaSamw /* 119b24ab676SJeff Bonwick * Don't use all 64 bits, since we need some in the cookie for 120b24ab676SJeff Bonwick * the collision differentiator. We MUST use the high bits, 121b24ab676SJeff Bonwick * since those are the ones that we first pay attention to when 122da6c28aaSamw * chosing the bucket. 123da6c28aaSamw */ 124b24ab676SJeff Bonwick h &= ~((1ULL << (64 - zap_hashbits(zap))) - 1); 125da6c28aaSamw 126b24ab676SJeff Bonwick return (h); 127da6c28aaSamw } 128da6c28aaSamw 129da6c28aaSamw static int 130da6c28aaSamw zap_normalize(zap_t *zap, const char *name, char *namenorm) 131da6c28aaSamw { 132da6c28aaSamw size_t inlen, outlen; 133da6c28aaSamw int err; 134da6c28aaSamw 135b24ab676SJeff Bonwick ASSERT(!(zap_getflags(zap) & ZAP_FLAG_UINT64_KEY)); 136b24ab676SJeff Bonwick 137da6c28aaSamw inlen = strlen(name) + 1; 138da6c28aaSamw outlen = ZAP_MAXNAMELEN; 139da6c28aaSamw 140da6c28aaSamw err = 0; 141da6c28aaSamw (void) u8_textprep_str((char *)name, &inlen, namenorm, &outlen, 142d05ba1e6STim Haley zap->zap_normflags | U8_TEXTPREP_IGNORE_NULL | 143d05ba1e6STim Haley U8_TEXTPREP_IGNORE_INVALID, U8_UNICODE_LATEST, &err); 144da6c28aaSamw 145da6c28aaSamw return (err); 146da6c28aaSamw } 147da6c28aaSamw 148da6c28aaSamw boolean_t 149da6c28aaSamw zap_match(zap_name_t *zn, const char *matchname) 150da6c28aaSamw { 151b24ab676SJeff Bonwick ASSERT(!(zap_getflags(zn->zn_zap) & ZAP_FLAG_UINT64_KEY)); 152b24ab676SJeff Bonwick 153da6c28aaSamw if (zn->zn_matchtype == MT_FIRST) { 154da6c28aaSamw char norm[ZAP_MAXNAMELEN]; 155da6c28aaSamw 156da6c28aaSamw if (zap_normalize(zn->zn_zap, matchname, norm) != 0) 157da6c28aaSamw return (B_FALSE); 158da6c28aaSamw 159b24ab676SJeff Bonwick return (strcmp(zn->zn_key_norm, norm) == 0); 160da6c28aaSamw } else { 161da6c28aaSamw /* MT_BEST or MT_EXACT */ 162b24ab676SJeff Bonwick return (strcmp(zn->zn_key_orig, matchname) == 0); 163da6c28aaSamw } 164da6c28aaSamw } 165da6c28aaSamw 166da6c28aaSamw void 167da6c28aaSamw zap_name_free(zap_name_t *zn) 168da6c28aaSamw { 169da6c28aaSamw kmem_free(zn, sizeof (zap_name_t)); 170da6c28aaSamw } 171da6c28aaSamw 172da6c28aaSamw zap_name_t * 173b24ab676SJeff Bonwick zap_name_alloc(zap_t *zap, const char *key, matchtype_t mt) 174da6c28aaSamw { 175da6c28aaSamw zap_name_t *zn = kmem_alloc(sizeof (zap_name_t), KM_SLEEP); 176da6c28aaSamw 177da6c28aaSamw zn->zn_zap = zap; 178b24ab676SJeff Bonwick zn->zn_key_intlen = sizeof (*key); 179b24ab676SJeff Bonwick zn->zn_key_orig = key; 180486ae710SMatthew Ahrens zn->zn_key_orig_numints = strlen(zn->zn_key_orig) + 1; 181da6c28aaSamw zn->zn_matchtype = mt; 182da6c28aaSamw if (zap->zap_normflags) { 183b24ab676SJeff Bonwick if (zap_normalize(zap, key, zn->zn_normbuf) != 0) { 184da6c28aaSamw zap_name_free(zn); 185da6c28aaSamw return (NULL); 186da6c28aaSamw } 187b24ab676SJeff Bonwick zn->zn_key_norm = zn->zn_normbuf; 188486ae710SMatthew Ahrens zn->zn_key_norm_numints = strlen(zn->zn_key_norm) + 1; 189da6c28aaSamw } else { 190da6c28aaSamw if (mt != MT_EXACT) { 191da6c28aaSamw zap_name_free(zn); 192da6c28aaSamw return (NULL); 193da6c28aaSamw } 194b24ab676SJeff Bonwick zn->zn_key_norm = zn->zn_key_orig; 195486ae710SMatthew Ahrens zn->zn_key_norm_numints = zn->zn_key_orig_numints; 196da6c28aaSamw } 197da6c28aaSamw 198b24ab676SJeff Bonwick zn->zn_hash = zap_hash(zn); 199b24ab676SJeff Bonwick return (zn); 200b24ab676SJeff Bonwick } 201b24ab676SJeff Bonwick 202b24ab676SJeff Bonwick zap_name_t * 203b24ab676SJeff Bonwick zap_name_alloc_uint64(zap_t *zap, const uint64_t *key, int numints) 204b24ab676SJeff Bonwick { 205b24ab676SJeff Bonwick zap_name_t *zn = kmem_alloc(sizeof (zap_name_t), KM_SLEEP); 206b24ab676SJeff Bonwick 207b24ab676SJeff Bonwick ASSERT(zap->zap_normflags == 0); 208b24ab676SJeff Bonwick zn->zn_zap = zap; 209b24ab676SJeff Bonwick zn->zn_key_intlen = sizeof (*key); 210b24ab676SJeff Bonwick zn->zn_key_orig = zn->zn_key_norm = key; 211486ae710SMatthew Ahrens zn->zn_key_orig_numints = zn->zn_key_norm_numints = numints; 212b24ab676SJeff Bonwick zn->zn_matchtype = MT_EXACT; 213b24ab676SJeff Bonwick 214b24ab676SJeff Bonwick zn->zn_hash = zap_hash(zn); 215da6c28aaSamw return (zn); 216da6c28aaSamw } 217da6c28aaSamw 218fa9e4066Sahrens static void 219fa9e4066Sahrens mzap_byteswap(mzap_phys_t *buf, size_t size) 220fa9e4066Sahrens { 221fa9e4066Sahrens int i, max; 222fa9e4066Sahrens buf->mz_block_type = BSWAP_64(buf->mz_block_type); 223fa9e4066Sahrens buf->mz_salt = BSWAP_64(buf->mz_salt); 224ab04eb8eStimh buf->mz_normflags = BSWAP_64(buf->mz_normflags); 225fa9e4066Sahrens max = (size / MZAP_ENT_LEN) - 1; 226fa9e4066Sahrens for (i = 0; i < max; i++) { 227fa9e4066Sahrens buf->mz_chunk[i].mze_value = 228fa9e4066Sahrens BSWAP_64(buf->mz_chunk[i].mze_value); 229fa9e4066Sahrens buf->mz_chunk[i].mze_cd = 230fa9e4066Sahrens BSWAP_32(buf->mz_chunk[i].mze_cd); 231fa9e4066Sahrens } 232fa9e4066Sahrens } 233fa9e4066Sahrens 234fa9e4066Sahrens void 235fa9e4066Sahrens zap_byteswap(void *buf, size_t size) 236fa9e4066Sahrens { 237fa9e4066Sahrens uint64_t block_type; 238fa9e4066Sahrens 239fa9e4066Sahrens block_type = *(uint64_t *)buf; 240fa9e4066Sahrens 2415ad82045Snd if (block_type == ZBT_MICRO || block_type == BSWAP_64(ZBT_MICRO)) { 242fa9e4066Sahrens /* ASSERT(magic == ZAP_LEAF_MAGIC); */ 243fa9e4066Sahrens mzap_byteswap(buf, size); 2445ad82045Snd } else { 245fa9e4066Sahrens fzap_byteswap(buf, size); 246fa9e4066Sahrens } 247fa9e4066Sahrens } 248fa9e4066Sahrens 249fa9e4066Sahrens static int 250fa9e4066Sahrens mze_compare(const void *arg1, const void *arg2) 251fa9e4066Sahrens { 252fa9e4066Sahrens const mzap_ent_t *mze1 = arg1; 253fa9e4066Sahrens const mzap_ent_t *mze2 = arg2; 254fa9e4066Sahrens 255fa9e4066Sahrens if (mze1->mze_hash > mze2->mze_hash) 256fa9e4066Sahrens return (+1); 257fa9e4066Sahrens if (mze1->mze_hash < mze2->mze_hash) 258fa9e4066Sahrens return (-1); 2593f9d6ad7SLin Ling if (mze1->mze_cd > mze2->mze_cd) 260fa9e4066Sahrens return (+1); 2613f9d6ad7SLin Ling if (mze1->mze_cd < mze2->mze_cd) 262fa9e4066Sahrens return (-1); 263fa9e4066Sahrens return (0); 264fa9e4066Sahrens } 265fa9e4066Sahrens 266fa9e4066Sahrens static void 2673f9d6ad7SLin Ling mze_insert(zap_t *zap, int chunkid, uint64_t hash) 268fa9e4066Sahrens { 269fa9e4066Sahrens mzap_ent_t *mze; 270fa9e4066Sahrens 271fa9e4066Sahrens ASSERT(zap->zap_ismicro); 272fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 273fa9e4066Sahrens 274fa9e4066Sahrens mze = kmem_alloc(sizeof (mzap_ent_t), KM_SLEEP); 275fa9e4066Sahrens mze->mze_chunkid = chunkid; 276fa9e4066Sahrens mze->mze_hash = hash; 2773f9d6ad7SLin Ling mze->mze_cd = MZE_PHYS(zap, mze)->mze_cd; 2783f9d6ad7SLin Ling ASSERT(MZE_PHYS(zap, mze)->mze_name[0] != 0); 279fa9e4066Sahrens avl_add(&zap->zap_m.zap_avl, mze); 280fa9e4066Sahrens } 281fa9e4066Sahrens 282fa9e4066Sahrens static mzap_ent_t * 283da6c28aaSamw mze_find(zap_name_t *zn) 284fa9e4066Sahrens { 285fa9e4066Sahrens mzap_ent_t mze_tofind; 286fa9e4066Sahrens mzap_ent_t *mze; 287fa9e4066Sahrens avl_index_t idx; 288da6c28aaSamw avl_tree_t *avl = &zn->zn_zap->zap_m.zap_avl; 289fa9e4066Sahrens 290da6c28aaSamw ASSERT(zn->zn_zap->zap_ismicro); 291da6c28aaSamw ASSERT(RW_LOCK_HELD(&zn->zn_zap->zap_rwlock)); 292fa9e4066Sahrens 293da6c28aaSamw mze_tofind.mze_hash = zn->zn_hash; 2943f9d6ad7SLin Ling mze_tofind.mze_cd = 0; 295fa9e4066Sahrens 296da6c28aaSamw again: 297fa9e4066Sahrens mze = avl_find(avl, &mze_tofind, &idx); 298fa9e4066Sahrens if (mze == NULL) 299fa9e4066Sahrens mze = avl_nearest(avl, idx, AVL_AFTER); 300da6c28aaSamw for (; mze && mze->mze_hash == zn->zn_hash; mze = AVL_NEXT(avl, mze)) { 3013f9d6ad7SLin Ling ASSERT3U(mze->mze_cd, ==, MZE_PHYS(zn->zn_zap, mze)->mze_cd); 3023f9d6ad7SLin Ling if (zap_match(zn, MZE_PHYS(zn->zn_zap, mze)->mze_name)) 303fa9e4066Sahrens return (mze); 304fa9e4066Sahrens } 305da6c28aaSamw if (zn->zn_matchtype == MT_BEST) { 306da6c28aaSamw zn->zn_matchtype = MT_FIRST; 307da6c28aaSamw goto again; 308da6c28aaSamw } 309fa9e4066Sahrens return (NULL); 310fa9e4066Sahrens } 311fa9e4066Sahrens 312fa9e4066Sahrens static uint32_t 313fa9e4066Sahrens mze_find_unused_cd(zap_t *zap, uint64_t hash) 314fa9e4066Sahrens { 315fa9e4066Sahrens mzap_ent_t mze_tofind; 316fa9e4066Sahrens mzap_ent_t *mze; 317fa9e4066Sahrens avl_index_t idx; 318fa9e4066Sahrens avl_tree_t *avl = &zap->zap_m.zap_avl; 319fa9e4066Sahrens uint32_t cd; 320fa9e4066Sahrens 321fa9e4066Sahrens ASSERT(zap->zap_ismicro); 322fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 323fa9e4066Sahrens 324fa9e4066Sahrens mze_tofind.mze_hash = hash; 3253f9d6ad7SLin Ling mze_tofind.mze_cd = 0; 326fa9e4066Sahrens 327fa9e4066Sahrens cd = 0; 328fa9e4066Sahrens for (mze = avl_find(avl, &mze_tofind, &idx); 329fa9e4066Sahrens mze && mze->mze_hash == hash; mze = AVL_NEXT(avl, mze)) { 3303f9d6ad7SLin Ling if (mze->mze_cd != cd) 331fa9e4066Sahrens break; 332fa9e4066Sahrens cd++; 333fa9e4066Sahrens } 334fa9e4066Sahrens 335fa9e4066Sahrens return (cd); 336fa9e4066Sahrens } 337fa9e4066Sahrens 338fa9e4066Sahrens static void 339fa9e4066Sahrens mze_remove(zap_t *zap, mzap_ent_t *mze) 340fa9e4066Sahrens { 341fa9e4066Sahrens ASSERT(zap->zap_ismicro); 342fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 343fa9e4066Sahrens 344fa9e4066Sahrens avl_remove(&zap->zap_m.zap_avl, mze); 345fa9e4066Sahrens kmem_free(mze, sizeof (mzap_ent_t)); 346fa9e4066Sahrens } 347fa9e4066Sahrens 348fa9e4066Sahrens static void 349fa9e4066Sahrens mze_destroy(zap_t *zap) 350fa9e4066Sahrens { 351fa9e4066Sahrens mzap_ent_t *mze; 352fa9e4066Sahrens void *avlcookie = NULL; 353fa9e4066Sahrens 354fa9e4066Sahrens while (mze = avl_destroy_nodes(&zap->zap_m.zap_avl, &avlcookie)) 355fa9e4066Sahrens kmem_free(mze, sizeof (mzap_ent_t)); 356fa9e4066Sahrens avl_destroy(&zap->zap_m.zap_avl); 357fa9e4066Sahrens } 358fa9e4066Sahrens 359fa9e4066Sahrens static zap_t * 360fa9e4066Sahrens mzap_open(objset_t *os, uint64_t obj, dmu_buf_t *db) 361fa9e4066Sahrens { 362fa9e4066Sahrens zap_t *winner; 363fa9e4066Sahrens zap_t *zap; 364fa9e4066Sahrens int i; 365fa9e4066Sahrens 366fa9e4066Sahrens ASSERT3U(MZAP_ENT_LEN, ==, sizeof (mzap_ent_phys_t)); 367fa9e4066Sahrens 368fa9e4066Sahrens zap = kmem_zalloc(sizeof (zap_t), KM_SLEEP); 369fa9e4066Sahrens rw_init(&zap->zap_rwlock, 0, 0, 0); 370fa9e4066Sahrens rw_enter(&zap->zap_rwlock, RW_WRITER); 371fa9e4066Sahrens zap->zap_objset = os; 372fa9e4066Sahrens zap->zap_object = obj; 373fa9e4066Sahrens zap->zap_dbuf = db; 374fa9e4066Sahrens 375da6c28aaSamw if (*(uint64_t *)db->db_data != ZBT_MICRO) { 376fa9e4066Sahrens mutex_init(&zap->zap_f.zap_num_entries_mtx, 0, 0, 0); 377*bf16b11eSMatthew Ahrens zap->zap_f.zap_block_shift = highbit64(db->db_size) - 1; 378fa9e4066Sahrens } else { 379fa9e4066Sahrens zap->zap_ismicro = TRUE; 380fa9e4066Sahrens } 381fa9e4066Sahrens 382fa9e4066Sahrens /* 383fa9e4066Sahrens * Make sure that zap_ismicro is set before we let others see 384fa9e4066Sahrens * it, because zap_lockdir() checks zap_ismicro without the lock 385fa9e4066Sahrens * held. 386fa9e4066Sahrens */ 387455d5089Sahrens winner = dmu_buf_set_user(db, zap, &zap->zap_m.zap_phys, zap_evict); 388fa9e4066Sahrens 389fa9e4066Sahrens if (winner != NULL) { 390c25056deSgw rw_exit(&zap->zap_rwlock); 391c25056deSgw rw_destroy(&zap->zap_rwlock); 392c25056deSgw if (!zap->zap_ismicro) 393c25056deSgw mutex_destroy(&zap->zap_f.zap_num_entries_mtx); 394fa9e4066Sahrens kmem_free(zap, sizeof (zap_t)); 395fa9e4066Sahrens return (winner); 396fa9e4066Sahrens } 397fa9e4066Sahrens 398fa9e4066Sahrens if (zap->zap_ismicro) { 399fa9e4066Sahrens zap->zap_salt = zap->zap_m.zap_phys->mz_salt; 400da6c28aaSamw zap->zap_normflags = zap->zap_m.zap_phys->mz_normflags; 401fa9e4066Sahrens zap->zap_m.zap_num_chunks = db->db_size / MZAP_ENT_LEN - 1; 402fa9e4066Sahrens avl_create(&zap->zap_m.zap_avl, mze_compare, 403fa9e4066Sahrens sizeof (mzap_ent_t), offsetof(mzap_ent_t, mze_node)); 404fa9e4066Sahrens 405fa9e4066Sahrens for (i = 0; i < zap->zap_m.zap_num_chunks; i++) { 406fa9e4066Sahrens mzap_ent_phys_t *mze = 407fa9e4066Sahrens &zap->zap_m.zap_phys->mz_chunk[i]; 408fa9e4066Sahrens if (mze->mze_name[0]) { 409da6c28aaSamw zap_name_t *zn; 410da6c28aaSamw 411fa9e4066Sahrens zap->zap_m.zap_num_entries++; 412da6c28aaSamw zn = zap_name_alloc(zap, mze->mze_name, 413da6c28aaSamw MT_EXACT); 4143f9d6ad7SLin Ling mze_insert(zap, i, zn->zn_hash); 415da6c28aaSamw zap_name_free(zn); 416fa9e4066Sahrens } 417fa9e4066Sahrens } 418fa9e4066Sahrens } else { 419fa9e4066Sahrens zap->zap_salt = zap->zap_f.zap_phys->zap_salt; 420da6c28aaSamw zap->zap_normflags = zap->zap_f.zap_phys->zap_normflags; 421f65e61c0Sahrens 422f65e61c0Sahrens ASSERT3U(sizeof (struct zap_leaf_header), ==, 423f65e61c0Sahrens 2*ZAP_LEAF_CHUNKSIZE); 424f65e61c0Sahrens 425f65e61c0Sahrens /* 426f65e61c0Sahrens * The embedded pointer table should not overlap the 427f65e61c0Sahrens * other members. 428f65e61c0Sahrens */ 429f65e61c0Sahrens ASSERT3P(&ZAP_EMBEDDED_PTRTBL_ENT(zap, 0), >, 430f65e61c0Sahrens &zap->zap_f.zap_phys->zap_salt); 431f65e61c0Sahrens 432f65e61c0Sahrens /* 433f65e61c0Sahrens * The embedded pointer table should end at the end of 434f65e61c0Sahrens * the block 435f65e61c0Sahrens */ 436f65e61c0Sahrens ASSERT3U((uintptr_t)&ZAP_EMBEDDED_PTRTBL_ENT(zap, 437f65e61c0Sahrens 1<<ZAP_EMBEDDED_PTRTBL_SHIFT(zap)) - 438f65e61c0Sahrens (uintptr_t)zap->zap_f.zap_phys, ==, 439f65e61c0Sahrens zap->zap_dbuf->db_size); 440fa9e4066Sahrens } 441fa9e4066Sahrens rw_exit(&zap->zap_rwlock); 442fa9e4066Sahrens return (zap); 443fa9e4066Sahrens } 444fa9e4066Sahrens 445fa9e4066Sahrens int 446fa9e4066Sahrens zap_lockdir(objset_t *os, uint64_t obj, dmu_tx_t *tx, 447c5f9e431Sahrens krw_t lti, boolean_t fatreader, boolean_t adding, zap_t **zapp) 448fa9e4066Sahrens { 449fa9e4066Sahrens zap_t *zap; 450fa9e4066Sahrens dmu_buf_t *db; 451fa9e4066Sahrens krw_t lt; 452fa9e4066Sahrens int err; 453fa9e4066Sahrens 454fa9e4066Sahrens *zapp = NULL; 455fa9e4066Sahrens 45647cb52daSJeff Bonwick err = dmu_buf_hold(os, obj, 0, NULL, &db, DMU_READ_NO_PREFETCH); 457ea8dc4b6Seschrock if (err) 458ea8dc4b6Seschrock return (err); 459fa9e4066Sahrens 460fa9e4066Sahrens #ifdef ZFS_DEBUG 461fa9e4066Sahrens { 462fa9e4066Sahrens dmu_object_info_t doi; 463fa9e4066Sahrens dmu_object_info_from_db(db, &doi); 464ad135b5dSChristopher Siden ASSERT3U(DMU_OT_BYTESWAP(doi.doi_type), ==, DMU_BSWAP_ZAP); 465fa9e4066Sahrens } 466fa9e4066Sahrens #endif 467fa9e4066Sahrens 468fa9e4066Sahrens zap = dmu_buf_get_user(db); 469fa9e4066Sahrens if (zap == NULL) 470fa9e4066Sahrens zap = mzap_open(os, obj, db); 471fa9e4066Sahrens 472fa9e4066Sahrens /* 473fa9e4066Sahrens * We're checking zap_ismicro without the lock held, in order to 474fa9e4066Sahrens * tell what type of lock we want. Once we have some sort of 475fa9e4066Sahrens * lock, see if it really is the right type. In practice this 476fa9e4066Sahrens * can only be different if it was upgraded from micro to fat, 477fa9e4066Sahrens * and micro wanted WRITER but fat only needs READER. 478fa9e4066Sahrens */ 479fa9e4066Sahrens lt = (!zap->zap_ismicro && fatreader) ? RW_READER : lti; 480fa9e4066Sahrens rw_enter(&zap->zap_rwlock, lt); 481fa9e4066Sahrens if (lt != ((!zap->zap_ismicro && fatreader) ? RW_READER : lti)) { 482fa9e4066Sahrens /* it was upgraded, now we only need reader */ 483fa9e4066Sahrens ASSERT(lt == RW_WRITER); 484fa9e4066Sahrens ASSERT(RW_READER == 485fa9e4066Sahrens (!zap->zap_ismicro && fatreader) ? RW_READER : lti); 486fa9e4066Sahrens rw_downgrade(&zap->zap_rwlock); 487fa9e4066Sahrens lt = RW_READER; 488fa9e4066Sahrens } 489fa9e4066Sahrens 490fa9e4066Sahrens zap->zap_objset = os; 491fa9e4066Sahrens 492fa9e4066Sahrens if (lt == RW_WRITER) 493fa9e4066Sahrens dmu_buf_will_dirty(db, tx); 494fa9e4066Sahrens 495fa9e4066Sahrens ASSERT3P(zap->zap_dbuf, ==, db); 496fa9e4066Sahrens 497fa9e4066Sahrens ASSERT(!zap->zap_ismicro || 498fa9e4066Sahrens zap->zap_m.zap_num_entries <= zap->zap_m.zap_num_chunks); 499c5f9e431Sahrens if (zap->zap_ismicro && tx && adding && 500fa9e4066Sahrens zap->zap_m.zap_num_entries == zap->zap_m.zap_num_chunks) { 501fa9e4066Sahrens uint64_t newsz = db->db_size + SPA_MINBLOCKSIZE; 502fa9e4066Sahrens if (newsz > MZAP_MAX_BLKSZ) { 503fa9e4066Sahrens dprintf("upgrading obj %llu: num_entries=%u\n", 504fa9e4066Sahrens obj, zap->zap_m.zap_num_entries); 505fa9e4066Sahrens *zapp = zap; 506b24ab676SJeff Bonwick return (mzap_upgrade(zapp, tx, 0)); 507fa9e4066Sahrens } 508fa9e4066Sahrens err = dmu_object_set_blocksize(os, obj, newsz, 0, tx); 509fb09f5aaSMadhav Suresh ASSERT0(err); 510fa9e4066Sahrens zap->zap_m.zap_num_chunks = 511fa9e4066Sahrens db->db_size / MZAP_ENT_LEN - 1; 512fa9e4066Sahrens } 513fa9e4066Sahrens 514fa9e4066Sahrens *zapp = zap; 515fa9e4066Sahrens return (0); 516fa9e4066Sahrens } 517fa9e4066Sahrens 518fa9e4066Sahrens void 519fa9e4066Sahrens zap_unlockdir(zap_t *zap) 520fa9e4066Sahrens { 521fa9e4066Sahrens rw_exit(&zap->zap_rwlock); 522ea8dc4b6Seschrock dmu_buf_rele(zap->zap_dbuf, NULL); 523fa9e4066Sahrens } 524fa9e4066Sahrens 525ad860c82Sbonwick static int 526b24ab676SJeff Bonwick mzap_upgrade(zap_t **zapp, dmu_tx_t *tx, zap_flags_t flags) 527fa9e4066Sahrens { 528fa9e4066Sahrens mzap_phys_t *mzp; 529b24ab676SJeff Bonwick int i, sz, nchunks; 530b24ab676SJeff Bonwick int err = 0; 531ad860c82Sbonwick zap_t *zap = *zapp; 532fa9e4066Sahrens 533fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 534fa9e4066Sahrens 535fa9e4066Sahrens sz = zap->zap_dbuf->db_size; 536fa9e4066Sahrens mzp = kmem_alloc(sz, KM_SLEEP); 537fa9e4066Sahrens bcopy(zap->zap_dbuf->db_data, mzp, sz); 538fa9e4066Sahrens nchunks = zap->zap_m.zap_num_chunks; 539fa9e4066Sahrens 540b24ab676SJeff Bonwick if (!flags) { 541b24ab676SJeff Bonwick err = dmu_object_set_blocksize(zap->zap_objset, zap->zap_object, 542b24ab676SJeff Bonwick 1ULL << fzap_default_block_shift, 0, tx); 543b24ab676SJeff Bonwick if (err) { 544b24ab676SJeff Bonwick kmem_free(mzp, sz); 545b24ab676SJeff Bonwick return (err); 546b24ab676SJeff Bonwick } 547ad860c82Sbonwick } 548fa9e4066Sahrens 549fa9e4066Sahrens dprintf("upgrading obj=%llu with %u chunks\n", 550fa9e4066Sahrens zap->zap_object, nchunks); 551da6c28aaSamw /* XXX destroy the avl later, so we can use the stored hash value */ 552fa9e4066Sahrens mze_destroy(zap); 553fa9e4066Sahrens 554b24ab676SJeff Bonwick fzap_upgrade(zap, tx, flags); 555fa9e4066Sahrens 556fa9e4066Sahrens for (i = 0; i < nchunks; i++) { 557fa9e4066Sahrens mzap_ent_phys_t *mze = &mzp->mz_chunk[i]; 558da6c28aaSamw zap_name_t *zn; 559fa9e4066Sahrens if (mze->mze_name[0] == 0) 560fa9e4066Sahrens continue; 561fa9e4066Sahrens dprintf("adding %s=%llu\n", 562fa9e4066Sahrens mze->mze_name, mze->mze_value); 563da6c28aaSamw zn = zap_name_alloc(zap, mze->mze_name, MT_EXACT); 564ad860c82Sbonwick err = fzap_add_cd(zn, 8, 1, &mze->mze_value, mze->mze_cd, tx); 565ad860c82Sbonwick zap = zn->zn_zap; /* fzap_add_cd() may change zap */ 566da6c28aaSamw zap_name_free(zn); 567ad860c82Sbonwick if (err) 568ad860c82Sbonwick break; 569fa9e4066Sahrens } 570fa9e4066Sahrens kmem_free(mzp, sz); 571ad860c82Sbonwick *zapp = zap; 572ad860c82Sbonwick return (err); 573fa9e4066Sahrens } 574fa9e4066Sahrens 5752acef22dSMatthew Ahrens void 576b24ab676SJeff Bonwick mzap_create_impl(objset_t *os, uint64_t obj, int normflags, zap_flags_t flags, 577b24ab676SJeff Bonwick dmu_tx_t *tx) 578fa9e4066Sahrens { 579fa9e4066Sahrens dmu_buf_t *db; 580fa9e4066Sahrens mzap_phys_t *zp; 581fa9e4066Sahrens 58247cb52daSJeff Bonwick VERIFY(0 == dmu_buf_hold(os, obj, 0, FTAG, &db, DMU_READ_NO_PREFETCH)); 583fa9e4066Sahrens 584fa9e4066Sahrens #ifdef ZFS_DEBUG 585fa9e4066Sahrens { 586fa9e4066Sahrens dmu_object_info_t doi; 587fa9e4066Sahrens dmu_object_info_from_db(db, &doi); 588ad135b5dSChristopher Siden ASSERT3U(DMU_OT_BYTESWAP(doi.doi_type), ==, DMU_BSWAP_ZAP); 589fa9e4066Sahrens } 590fa9e4066Sahrens #endif 591fa9e4066Sahrens 592fa9e4066Sahrens dmu_buf_will_dirty(db, tx); 593fa9e4066Sahrens zp = db->db_data; 594fa9e4066Sahrens zp->mz_block_type = ZBT_MICRO; 595fa9e4066Sahrens zp->mz_salt = ((uintptr_t)db ^ (uintptr_t)tx ^ (obj << 1)) | 1ULL; 596da6c28aaSamw zp->mz_normflags = normflags; 597ea8dc4b6Seschrock dmu_buf_rele(db, FTAG); 598b24ab676SJeff Bonwick 599b24ab676SJeff Bonwick if (flags != 0) { 600b24ab676SJeff Bonwick zap_t *zap; 601b24ab676SJeff Bonwick /* Only fat zap supports flags; upgrade immediately. */ 602b24ab676SJeff Bonwick VERIFY(0 == zap_lockdir(os, obj, tx, RW_WRITER, 603b24ab676SJeff Bonwick B_FALSE, B_FALSE, &zap)); 604b420f3adSRichard Lowe VERIFY3U(0, ==, mzap_upgrade(&zap, tx, flags)); 605b24ab676SJeff Bonwick zap_unlockdir(zap); 606b24ab676SJeff Bonwick } 607fa9e4066Sahrens } 608fa9e4066Sahrens 609fa9e4066Sahrens int 610fa9e4066Sahrens zap_create_claim(objset_t *os, uint64_t obj, dmu_object_type_t ot, 611fa9e4066Sahrens dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) 612da6c28aaSamw { 613da6c28aaSamw return (zap_create_claim_norm(os, obj, 614da6c28aaSamw 0, ot, bonustype, bonuslen, tx)); 615da6c28aaSamw } 616da6c28aaSamw 617da6c28aaSamw int 618da6c28aaSamw zap_create_claim_norm(objset_t *os, uint64_t obj, int normflags, 619da6c28aaSamw dmu_object_type_t ot, 620da6c28aaSamw dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) 621fa9e4066Sahrens { 622fa9e4066Sahrens int err; 623fa9e4066Sahrens 624fa9e4066Sahrens err = dmu_object_claim(os, obj, ot, 0, bonustype, bonuslen, tx); 625fa9e4066Sahrens if (err != 0) 626fa9e4066Sahrens return (err); 627b24ab676SJeff Bonwick mzap_create_impl(os, obj, normflags, 0, tx); 628fa9e4066Sahrens return (0); 629fa9e4066Sahrens } 630fa9e4066Sahrens 631fa9e4066Sahrens uint64_t 632fa9e4066Sahrens zap_create(objset_t *os, dmu_object_type_t ot, 633fa9e4066Sahrens dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) 634da6c28aaSamw { 635da6c28aaSamw return (zap_create_norm(os, 0, ot, bonustype, bonuslen, tx)); 636da6c28aaSamw } 637da6c28aaSamw 638da6c28aaSamw uint64_t 639da6c28aaSamw zap_create_norm(objset_t *os, int normflags, dmu_object_type_t ot, 640da6c28aaSamw dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) 641fa9e4066Sahrens { 642fa9e4066Sahrens uint64_t obj = dmu_object_alloc(os, ot, 0, bonustype, bonuslen, tx); 643fa9e4066Sahrens 644b24ab676SJeff Bonwick mzap_create_impl(os, obj, normflags, 0, tx); 645b24ab676SJeff Bonwick return (obj); 646b24ab676SJeff Bonwick } 647b24ab676SJeff Bonwick 648b24ab676SJeff Bonwick uint64_t 649b24ab676SJeff Bonwick zap_create_flags(objset_t *os, int normflags, zap_flags_t flags, 650b24ab676SJeff Bonwick dmu_object_type_t ot, int leaf_blockshift, int indirect_blockshift, 651b24ab676SJeff Bonwick dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) 652b24ab676SJeff Bonwick { 653b24ab676SJeff Bonwick uint64_t obj = dmu_object_alloc(os, ot, 0, bonustype, bonuslen, tx); 654b24ab676SJeff Bonwick 655b24ab676SJeff Bonwick ASSERT(leaf_blockshift >= SPA_MINBLOCKSHIFT && 656b24ab676SJeff Bonwick leaf_blockshift <= SPA_MAXBLOCKSHIFT && 657b24ab676SJeff Bonwick indirect_blockshift >= SPA_MINBLOCKSHIFT && 658b24ab676SJeff Bonwick indirect_blockshift <= SPA_MAXBLOCKSHIFT); 659b24ab676SJeff Bonwick 660b24ab676SJeff Bonwick VERIFY(dmu_object_set_blocksize(os, obj, 661b24ab676SJeff Bonwick 1ULL << leaf_blockshift, indirect_blockshift, tx) == 0); 662b24ab676SJeff Bonwick 663b24ab676SJeff Bonwick mzap_create_impl(os, obj, normflags, flags, tx); 664fa9e4066Sahrens return (obj); 665fa9e4066Sahrens } 666fa9e4066Sahrens 667fa9e4066Sahrens int 668fa9e4066Sahrens zap_destroy(objset_t *os, uint64_t zapobj, dmu_tx_t *tx) 669fa9e4066Sahrens { 670fa9e4066Sahrens /* 671fa9e4066Sahrens * dmu_object_free will free the object number and free the 672fa9e4066Sahrens * data. Freeing the data will cause our pageout function to be 673fa9e4066Sahrens * called, which will destroy our data (zap_leaf_t's and zap_t). 674fa9e4066Sahrens */ 675fa9e4066Sahrens 676fa9e4066Sahrens return (dmu_object_free(os, zapobj, tx)); 677fa9e4066Sahrens } 678fa9e4066Sahrens 679fa9e4066Sahrens _NOTE(ARGSUSED(0)) 680fa9e4066Sahrens void 681455d5089Sahrens zap_evict(dmu_buf_t *db, void *vzap) 682fa9e4066Sahrens { 683455d5089Sahrens zap_t *zap = vzap; 684fa9e4066Sahrens 685fa9e4066Sahrens rw_destroy(&zap->zap_rwlock); 686fa9e4066Sahrens 687f65e61c0Sahrens if (zap->zap_ismicro) 688fa9e4066Sahrens mze_destroy(zap); 689c25056deSgw else 690c25056deSgw mutex_destroy(&zap->zap_f.zap_num_entries_mtx); 691fa9e4066Sahrens 692fa9e4066Sahrens kmem_free(zap, sizeof (zap_t)); 693fa9e4066Sahrens } 694fa9e4066Sahrens 695fa9e4066Sahrens int 696fa9e4066Sahrens zap_count(objset_t *os, uint64_t zapobj, uint64_t *count) 697fa9e4066Sahrens { 698fa9e4066Sahrens zap_t *zap; 699fa9e4066Sahrens int err; 700fa9e4066Sahrens 701c5f9e431Sahrens err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); 702fa9e4066Sahrens if (err) 703fa9e4066Sahrens return (err); 704fa9e4066Sahrens if (!zap->zap_ismicro) { 705fa9e4066Sahrens err = fzap_count(zap, count); 706fa9e4066Sahrens } else { 707fa9e4066Sahrens *count = zap->zap_m.zap_num_entries; 708fa9e4066Sahrens } 709fa9e4066Sahrens zap_unlockdir(zap); 710fa9e4066Sahrens return (err); 711fa9e4066Sahrens } 712fa9e4066Sahrens 713fa9e4066Sahrens /* 714da6c28aaSamw * zn may be NULL; if not specified, it will be computed if needed. 715da6c28aaSamw * See also the comment above zap_entry_normalization_conflict(). 716da6c28aaSamw */ 717da6c28aaSamw static boolean_t 718da6c28aaSamw mzap_normalization_conflict(zap_t *zap, zap_name_t *zn, mzap_ent_t *mze) 719da6c28aaSamw { 720da6c28aaSamw mzap_ent_t *other; 721da6c28aaSamw int direction = AVL_BEFORE; 722da6c28aaSamw boolean_t allocdzn = B_FALSE; 723da6c28aaSamw 724da6c28aaSamw if (zap->zap_normflags == 0) 725da6c28aaSamw return (B_FALSE); 726da6c28aaSamw 727da6c28aaSamw again: 728da6c28aaSamw for (other = avl_walk(&zap->zap_m.zap_avl, mze, direction); 729da6c28aaSamw other && other->mze_hash == mze->mze_hash; 730da6c28aaSamw other = avl_walk(&zap->zap_m.zap_avl, other, direction)) { 731da6c28aaSamw 732da6c28aaSamw if (zn == NULL) { 7333f9d6ad7SLin Ling zn = zap_name_alloc(zap, MZE_PHYS(zap, mze)->mze_name, 734da6c28aaSamw MT_FIRST); 735da6c28aaSamw allocdzn = B_TRUE; 736da6c28aaSamw } 7373f9d6ad7SLin Ling if (zap_match(zn, MZE_PHYS(zap, other)->mze_name)) { 738da6c28aaSamw if (allocdzn) 739da6c28aaSamw zap_name_free(zn); 740da6c28aaSamw return (B_TRUE); 741da6c28aaSamw } 742da6c28aaSamw } 743da6c28aaSamw 744da6c28aaSamw if (direction == AVL_BEFORE) { 745da6c28aaSamw direction = AVL_AFTER; 746da6c28aaSamw goto again; 747da6c28aaSamw } 748da6c28aaSamw 749da6c28aaSamw if (allocdzn) 750da6c28aaSamw zap_name_free(zn); 751da6c28aaSamw return (B_FALSE); 752da6c28aaSamw } 753da6c28aaSamw 754da6c28aaSamw /* 755da6c28aaSamw * Routines for manipulating attributes. 756fa9e4066Sahrens */ 757fa9e4066Sahrens 758fa9e4066Sahrens int 759fa9e4066Sahrens zap_lookup(objset_t *os, uint64_t zapobj, const char *name, 760fa9e4066Sahrens uint64_t integer_size, uint64_t num_integers, void *buf) 761da6c28aaSamw { 762da6c28aaSamw return (zap_lookup_norm(os, zapobj, name, integer_size, 763da6c28aaSamw num_integers, buf, MT_EXACT, NULL, 0, NULL)); 764da6c28aaSamw } 765da6c28aaSamw 766da6c28aaSamw int 767da6c28aaSamw zap_lookup_norm(objset_t *os, uint64_t zapobj, const char *name, 768da6c28aaSamw uint64_t integer_size, uint64_t num_integers, void *buf, 769da6c28aaSamw matchtype_t mt, char *realname, int rn_len, 770da6c28aaSamw boolean_t *ncp) 771fa9e4066Sahrens { 772fa9e4066Sahrens zap_t *zap; 773fa9e4066Sahrens int err; 774fa9e4066Sahrens mzap_ent_t *mze; 775da6c28aaSamw zap_name_t *zn; 776fa9e4066Sahrens 777c5f9e431Sahrens err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); 778fa9e4066Sahrens if (err) 779fa9e4066Sahrens return (err); 780da6c28aaSamw zn = zap_name_alloc(zap, name, mt); 781da6c28aaSamw if (zn == NULL) { 782da6c28aaSamw zap_unlockdir(zap); 783be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 784da6c28aaSamw } 785da6c28aaSamw 786fa9e4066Sahrens if (!zap->zap_ismicro) { 787da6c28aaSamw err = fzap_lookup(zn, integer_size, num_integers, buf, 788da6c28aaSamw realname, rn_len, ncp); 789fa9e4066Sahrens } else { 790da6c28aaSamw mze = mze_find(zn); 791fa9e4066Sahrens if (mze == NULL) { 792be6fd75aSMatthew Ahrens err = SET_ERROR(ENOENT); 793fa9e4066Sahrens } else { 794da6c28aaSamw if (num_integers < 1) { 795be6fd75aSMatthew Ahrens err = SET_ERROR(EOVERFLOW); 796da6c28aaSamw } else if (integer_size != 8) { 797be6fd75aSMatthew Ahrens err = SET_ERROR(EINVAL); 798da6c28aaSamw } else { 7993f9d6ad7SLin Ling *(uint64_t *)buf = 8003f9d6ad7SLin Ling MZE_PHYS(zap, mze)->mze_value; 801da6c28aaSamw (void) strlcpy(realname, 8023f9d6ad7SLin Ling MZE_PHYS(zap, mze)->mze_name, rn_len); 803da6c28aaSamw if (ncp) { 804da6c28aaSamw *ncp = mzap_normalization_conflict(zap, 805da6c28aaSamw zn, mze); 806da6c28aaSamw } 807da6c28aaSamw } 808fa9e4066Sahrens } 809fa9e4066Sahrens } 810da6c28aaSamw zap_name_free(zn); 811fa9e4066Sahrens zap_unlockdir(zap); 812fa9e4066Sahrens return (err); 813fa9e4066Sahrens } 814fa9e4066Sahrens 815c7cd2421SGeorge Wilson int 816c7cd2421SGeorge Wilson zap_prefetch_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, 817c7cd2421SGeorge Wilson int key_numints) 818c7cd2421SGeorge Wilson { 819c7cd2421SGeorge Wilson zap_t *zap; 820c7cd2421SGeorge Wilson int err; 821c7cd2421SGeorge Wilson zap_name_t *zn; 822c7cd2421SGeorge Wilson 823c7cd2421SGeorge Wilson err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); 824c7cd2421SGeorge Wilson if (err) 825c7cd2421SGeorge Wilson return (err); 826c7cd2421SGeorge Wilson zn = zap_name_alloc_uint64(zap, key, key_numints); 827c7cd2421SGeorge Wilson if (zn == NULL) { 828c7cd2421SGeorge Wilson zap_unlockdir(zap); 829be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 830c7cd2421SGeorge Wilson } 831c7cd2421SGeorge Wilson 832c7cd2421SGeorge Wilson fzap_prefetch(zn); 833c7cd2421SGeorge Wilson zap_name_free(zn); 834c7cd2421SGeorge Wilson zap_unlockdir(zap); 835c7cd2421SGeorge Wilson return (err); 836c7cd2421SGeorge Wilson } 837c7cd2421SGeorge Wilson 838b24ab676SJeff Bonwick int 839b24ab676SJeff Bonwick zap_lookup_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, 840b24ab676SJeff Bonwick int key_numints, uint64_t integer_size, uint64_t num_integers, void *buf) 841b24ab676SJeff Bonwick { 842b24ab676SJeff Bonwick zap_t *zap; 843b24ab676SJeff Bonwick int err; 844b24ab676SJeff Bonwick zap_name_t *zn; 845b24ab676SJeff Bonwick 846b24ab676SJeff Bonwick err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); 847b24ab676SJeff Bonwick if (err) 848b24ab676SJeff Bonwick return (err); 849b24ab676SJeff Bonwick zn = zap_name_alloc_uint64(zap, key, key_numints); 850b24ab676SJeff Bonwick if (zn == NULL) { 851b24ab676SJeff Bonwick zap_unlockdir(zap); 852be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 853b24ab676SJeff Bonwick } 854b24ab676SJeff Bonwick 855b24ab676SJeff Bonwick err = fzap_lookup(zn, integer_size, num_integers, buf, 856b24ab676SJeff Bonwick NULL, 0, NULL); 857b24ab676SJeff Bonwick zap_name_free(zn); 858b24ab676SJeff Bonwick zap_unlockdir(zap); 859b24ab676SJeff Bonwick return (err); 860b24ab676SJeff Bonwick } 861b24ab676SJeff Bonwick 86292241e0bSTom Erickson int 86392241e0bSTom Erickson zap_contains(objset_t *os, uint64_t zapobj, const char *name) 86492241e0bSTom Erickson { 8652acef22dSMatthew Ahrens int err = zap_lookup_norm(os, zapobj, name, 0, 8662acef22dSMatthew Ahrens 0, NULL, MT_EXACT, NULL, 0, NULL); 86792241e0bSTom Erickson if (err == EOVERFLOW || err == EINVAL) 86892241e0bSTom Erickson err = 0; /* found, but skipped reading the value */ 86992241e0bSTom Erickson return (err); 87092241e0bSTom Erickson } 87192241e0bSTom Erickson 872fa9e4066Sahrens int 873fa9e4066Sahrens zap_length(objset_t *os, uint64_t zapobj, const char *name, 874fa9e4066Sahrens uint64_t *integer_size, uint64_t *num_integers) 875fa9e4066Sahrens { 876fa9e4066Sahrens zap_t *zap; 877fa9e4066Sahrens int err; 878fa9e4066Sahrens mzap_ent_t *mze; 879da6c28aaSamw zap_name_t *zn; 880fa9e4066Sahrens 881c5f9e431Sahrens err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); 882fa9e4066Sahrens if (err) 883fa9e4066Sahrens return (err); 884da6c28aaSamw zn = zap_name_alloc(zap, name, MT_EXACT); 885da6c28aaSamw if (zn == NULL) { 886da6c28aaSamw zap_unlockdir(zap); 887be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 888da6c28aaSamw } 889fa9e4066Sahrens if (!zap->zap_ismicro) { 890da6c28aaSamw err = fzap_length(zn, integer_size, num_integers); 891fa9e4066Sahrens } else { 892da6c28aaSamw mze = mze_find(zn); 893fa9e4066Sahrens if (mze == NULL) { 894be6fd75aSMatthew Ahrens err = SET_ERROR(ENOENT); 895fa9e4066Sahrens } else { 896fa9e4066Sahrens if (integer_size) 897fa9e4066Sahrens *integer_size = 8; 898fa9e4066Sahrens if (num_integers) 899fa9e4066Sahrens *num_integers = 1; 900fa9e4066Sahrens } 901fa9e4066Sahrens } 902da6c28aaSamw zap_name_free(zn); 903fa9e4066Sahrens zap_unlockdir(zap); 904fa9e4066Sahrens return (err); 905fa9e4066Sahrens } 906fa9e4066Sahrens 907b24ab676SJeff Bonwick int 908b24ab676SJeff Bonwick zap_length_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, 909b24ab676SJeff Bonwick int key_numints, uint64_t *integer_size, uint64_t *num_integers) 910b24ab676SJeff Bonwick { 911b24ab676SJeff Bonwick zap_t *zap; 912b24ab676SJeff Bonwick int err; 913b24ab676SJeff Bonwick zap_name_t *zn; 914b24ab676SJeff Bonwick 915b24ab676SJeff Bonwick err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); 916b24ab676SJeff Bonwick if (err) 917b24ab676SJeff Bonwick return (err); 918b24ab676SJeff Bonwick zn = zap_name_alloc_uint64(zap, key, key_numints); 919b24ab676SJeff Bonwick if (zn == NULL) { 920b24ab676SJeff Bonwick zap_unlockdir(zap); 921be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 922b24ab676SJeff Bonwick } 923b24ab676SJeff Bonwick err = fzap_length(zn, integer_size, num_integers); 924b24ab676SJeff Bonwick zap_name_free(zn); 925b24ab676SJeff Bonwick zap_unlockdir(zap); 926b24ab676SJeff Bonwick return (err); 927b24ab676SJeff Bonwick } 928b24ab676SJeff Bonwick 929fa9e4066Sahrens static void 930da6c28aaSamw mzap_addent(zap_name_t *zn, uint64_t value) 931fa9e4066Sahrens { 932fa9e4066Sahrens int i; 933da6c28aaSamw zap_t *zap = zn->zn_zap; 934fa9e4066Sahrens int start = zap->zap_m.zap_alloc_next; 935fa9e4066Sahrens uint32_t cd; 936fa9e4066Sahrens 937fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 938fa9e4066Sahrens 939fa9e4066Sahrens #ifdef ZFS_DEBUG 940fa9e4066Sahrens for (i = 0; i < zap->zap_m.zap_num_chunks; i++) { 941fa9e4066Sahrens mzap_ent_phys_t *mze = &zap->zap_m.zap_phys->mz_chunk[i]; 942b24ab676SJeff Bonwick ASSERT(strcmp(zn->zn_key_orig, mze->mze_name) != 0); 943fa9e4066Sahrens } 944fa9e4066Sahrens #endif 945fa9e4066Sahrens 946da6c28aaSamw cd = mze_find_unused_cd(zap, zn->zn_hash); 947fa9e4066Sahrens /* given the limited size of the microzap, this can't happen */ 948b24ab676SJeff Bonwick ASSERT(cd < zap_maxcd(zap)); 949fa9e4066Sahrens 950fa9e4066Sahrens again: 951fa9e4066Sahrens for (i = start; i < zap->zap_m.zap_num_chunks; i++) { 952fa9e4066Sahrens mzap_ent_phys_t *mze = &zap->zap_m.zap_phys->mz_chunk[i]; 953fa9e4066Sahrens if (mze->mze_name[0] == 0) { 954fa9e4066Sahrens mze->mze_value = value; 955fa9e4066Sahrens mze->mze_cd = cd; 956b24ab676SJeff Bonwick (void) strcpy(mze->mze_name, zn->zn_key_orig); 957fa9e4066Sahrens zap->zap_m.zap_num_entries++; 958fa9e4066Sahrens zap->zap_m.zap_alloc_next = i+1; 959fa9e4066Sahrens if (zap->zap_m.zap_alloc_next == 960fa9e4066Sahrens zap->zap_m.zap_num_chunks) 961fa9e4066Sahrens zap->zap_m.zap_alloc_next = 0; 9623f9d6ad7SLin Ling mze_insert(zap, i, zn->zn_hash); 963fa9e4066Sahrens return; 964fa9e4066Sahrens } 965fa9e4066Sahrens } 966fa9e4066Sahrens if (start != 0) { 967fa9e4066Sahrens start = 0; 968fa9e4066Sahrens goto again; 969fa9e4066Sahrens } 970fa9e4066Sahrens ASSERT(!"out of entries!"); 971fa9e4066Sahrens } 972fa9e4066Sahrens 973fa9e4066Sahrens int 974b24ab676SJeff Bonwick zap_add(objset_t *os, uint64_t zapobj, const char *key, 975fa9e4066Sahrens int integer_size, uint64_t num_integers, 976fa9e4066Sahrens const void *val, dmu_tx_t *tx) 977fa9e4066Sahrens { 978fa9e4066Sahrens zap_t *zap; 979fa9e4066Sahrens int err; 980fa9e4066Sahrens mzap_ent_t *mze; 981fa9e4066Sahrens const uint64_t *intval = val; 982da6c28aaSamw zap_name_t *zn; 983fa9e4066Sahrens 984c5f9e431Sahrens err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, &zap); 985fa9e4066Sahrens if (err) 986fa9e4066Sahrens return (err); 987b24ab676SJeff Bonwick zn = zap_name_alloc(zap, key, MT_EXACT); 988da6c28aaSamw if (zn == NULL) { 989da6c28aaSamw zap_unlockdir(zap); 990be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 991da6c28aaSamw } 992fa9e4066Sahrens if (!zap->zap_ismicro) { 993da6c28aaSamw err = fzap_add(zn, integer_size, num_integers, val, tx); 994ad860c82Sbonwick zap = zn->zn_zap; /* fzap_add() may change zap */ 995fa9e4066Sahrens } else if (integer_size != 8 || num_integers != 1 || 996b24ab676SJeff Bonwick strlen(key) >= MZAP_NAME_LEN) { 997b24ab676SJeff Bonwick err = mzap_upgrade(&zn->zn_zap, tx, 0); 998ad860c82Sbonwick if (err == 0) 999ad860c82Sbonwick err = fzap_add(zn, integer_size, num_integers, val, tx); 1000ad860c82Sbonwick zap = zn->zn_zap; /* fzap_add() may change zap */ 1001fa9e4066Sahrens } else { 1002da6c28aaSamw mze = mze_find(zn); 1003fa9e4066Sahrens if (mze != NULL) { 1004be6fd75aSMatthew Ahrens err = SET_ERROR(EEXIST); 1005fa9e4066Sahrens } else { 1006da6c28aaSamw mzap_addent(zn, *intval); 1007fa9e4066Sahrens } 1008fa9e4066Sahrens } 1009ad860c82Sbonwick ASSERT(zap == zn->zn_zap); 1010da6c28aaSamw zap_name_free(zn); 1011ad860c82Sbonwick if (zap != NULL) /* may be NULL if fzap_add() failed */ 1012ad860c82Sbonwick zap_unlockdir(zap); 1013fa9e4066Sahrens return (err); 1014fa9e4066Sahrens } 1015fa9e4066Sahrens 1016b24ab676SJeff Bonwick int 1017b24ab676SJeff Bonwick zap_add_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, 1018b24ab676SJeff Bonwick int key_numints, int integer_size, uint64_t num_integers, 1019b24ab676SJeff Bonwick const void *val, dmu_tx_t *tx) 1020b24ab676SJeff Bonwick { 1021b24ab676SJeff Bonwick zap_t *zap; 1022b24ab676SJeff Bonwick int err; 1023b24ab676SJeff Bonwick zap_name_t *zn; 1024b24ab676SJeff Bonwick 1025b24ab676SJeff Bonwick err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, &zap); 1026b24ab676SJeff Bonwick if (err) 1027b24ab676SJeff Bonwick return (err); 1028b24ab676SJeff Bonwick zn = zap_name_alloc_uint64(zap, key, key_numints); 1029b24ab676SJeff Bonwick if (zn == NULL) { 1030b24ab676SJeff Bonwick zap_unlockdir(zap); 1031be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 1032b24ab676SJeff Bonwick } 1033b24ab676SJeff Bonwick err = fzap_add(zn, integer_size, num_integers, val, tx); 1034b24ab676SJeff Bonwick zap = zn->zn_zap; /* fzap_add() may change zap */ 1035b24ab676SJeff Bonwick zap_name_free(zn); 1036b24ab676SJeff Bonwick if (zap != NULL) /* may be NULL if fzap_add() failed */ 1037b24ab676SJeff Bonwick zap_unlockdir(zap); 1038b24ab676SJeff Bonwick return (err); 1039b24ab676SJeff Bonwick } 1040b24ab676SJeff Bonwick 1041fa9e4066Sahrens int 1042fa9e4066Sahrens zap_update(objset_t *os, uint64_t zapobj, const char *name, 1043fa9e4066Sahrens int integer_size, uint64_t num_integers, const void *val, dmu_tx_t *tx) 1044fa9e4066Sahrens { 1045fa9e4066Sahrens zap_t *zap; 1046fa9e4066Sahrens mzap_ent_t *mze; 10473f9d6ad7SLin Ling uint64_t oldval; 1048fa9e4066Sahrens const uint64_t *intval = val; 1049da6c28aaSamw zap_name_t *zn; 1050fa9e4066Sahrens int err; 1051fa9e4066Sahrens 10523f9d6ad7SLin Ling #ifdef ZFS_DEBUG 10533f9d6ad7SLin Ling /* 10543f9d6ad7SLin Ling * If there is an old value, it shouldn't change across the 10553f9d6ad7SLin Ling * lockdir (eg, due to bprewrite's xlation). 10563f9d6ad7SLin Ling */ 10573f9d6ad7SLin Ling if (integer_size == 8 && num_integers == 1) 10583f9d6ad7SLin Ling (void) zap_lookup(os, zapobj, name, 8, 1, &oldval); 10593f9d6ad7SLin Ling #endif 10603f9d6ad7SLin Ling 1061c5f9e431Sahrens err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, &zap); 1062fa9e4066Sahrens if (err) 1063fa9e4066Sahrens return (err); 1064da6c28aaSamw zn = zap_name_alloc(zap, name, MT_EXACT); 1065da6c28aaSamw if (zn == NULL) { 1066da6c28aaSamw zap_unlockdir(zap); 1067be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 1068da6c28aaSamw } 1069fa9e4066Sahrens if (!zap->zap_ismicro) { 1070da6c28aaSamw err = fzap_update(zn, integer_size, num_integers, val, tx); 1071ad860c82Sbonwick zap = zn->zn_zap; /* fzap_update() may change zap */ 1072fa9e4066Sahrens } else if (integer_size != 8 || num_integers != 1 || 1073fa9e4066Sahrens strlen(name) >= MZAP_NAME_LEN) { 1074fa9e4066Sahrens dprintf("upgrading obj %llu: intsz=%u numint=%llu name=%s\n", 1075fa9e4066Sahrens zapobj, integer_size, num_integers, name); 1076b24ab676SJeff Bonwick err = mzap_upgrade(&zn->zn_zap, tx, 0); 1077ad860c82Sbonwick if (err == 0) 1078ad860c82Sbonwick err = fzap_update(zn, integer_size, num_integers, 1079ad860c82Sbonwick val, tx); 1080ad860c82Sbonwick zap = zn->zn_zap; /* fzap_update() may change zap */ 1081fa9e4066Sahrens } else { 1082da6c28aaSamw mze = mze_find(zn); 1083fa9e4066Sahrens if (mze != NULL) { 10843f9d6ad7SLin Ling ASSERT3U(MZE_PHYS(zap, mze)->mze_value, ==, oldval); 10853f9d6ad7SLin Ling MZE_PHYS(zap, mze)->mze_value = *intval; 1086fa9e4066Sahrens } else { 1087da6c28aaSamw mzap_addent(zn, *intval); 1088fa9e4066Sahrens } 1089fa9e4066Sahrens } 1090ad860c82Sbonwick ASSERT(zap == zn->zn_zap); 1091da6c28aaSamw zap_name_free(zn); 1092ad860c82Sbonwick if (zap != NULL) /* may be NULL if fzap_upgrade() failed */ 1093ad860c82Sbonwick zap_unlockdir(zap); 1094455d5089Sahrens return (err); 1095fa9e4066Sahrens } 1096fa9e4066Sahrens 1097b24ab676SJeff Bonwick int 1098b24ab676SJeff Bonwick zap_update_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, 1099b24ab676SJeff Bonwick int key_numints, 1100b24ab676SJeff Bonwick int integer_size, uint64_t num_integers, const void *val, dmu_tx_t *tx) 1101b24ab676SJeff Bonwick { 1102b24ab676SJeff Bonwick zap_t *zap; 1103b24ab676SJeff Bonwick zap_name_t *zn; 1104b24ab676SJeff Bonwick int err; 1105b24ab676SJeff Bonwick 1106b24ab676SJeff Bonwick err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, &zap); 1107b24ab676SJeff Bonwick if (err) 1108b24ab676SJeff Bonwick return (err); 1109b24ab676SJeff Bonwick zn = zap_name_alloc_uint64(zap, key, key_numints); 1110b24ab676SJeff Bonwick if (zn == NULL) { 1111b24ab676SJeff Bonwick zap_unlockdir(zap); 1112be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 1113b24ab676SJeff Bonwick } 1114b24ab676SJeff Bonwick err = fzap_update(zn, integer_size, num_integers, val, tx); 1115b24ab676SJeff Bonwick zap = zn->zn_zap; /* fzap_update() may change zap */ 1116b24ab676SJeff Bonwick zap_name_free(zn); 1117b24ab676SJeff Bonwick if (zap != NULL) /* may be NULL if fzap_upgrade() failed */ 1118b24ab676SJeff Bonwick zap_unlockdir(zap); 1119b24ab676SJeff Bonwick return (err); 1120b24ab676SJeff Bonwick } 1121b24ab676SJeff Bonwick 1122fa9e4066Sahrens int 1123fa9e4066Sahrens zap_remove(objset_t *os, uint64_t zapobj, const char *name, dmu_tx_t *tx) 1124da6c28aaSamw { 1125da6c28aaSamw return (zap_remove_norm(os, zapobj, name, MT_EXACT, tx)); 1126da6c28aaSamw } 1127da6c28aaSamw 1128da6c28aaSamw int 1129da6c28aaSamw zap_remove_norm(objset_t *os, uint64_t zapobj, const char *name, 1130da6c28aaSamw matchtype_t mt, dmu_tx_t *tx) 1131fa9e4066Sahrens { 1132fa9e4066Sahrens zap_t *zap; 1133fa9e4066Sahrens int err; 1134fa9e4066Sahrens mzap_ent_t *mze; 1135da6c28aaSamw zap_name_t *zn; 1136fa9e4066Sahrens 1137c5f9e431Sahrens err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, FALSE, &zap); 1138fa9e4066Sahrens if (err) 1139fa9e4066Sahrens return (err); 1140da6c28aaSamw zn = zap_name_alloc(zap, name, mt); 1141da6c28aaSamw if (zn == NULL) { 1142da6c28aaSamw zap_unlockdir(zap); 1143be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 1144da6c28aaSamw } 1145fa9e4066Sahrens if (!zap->zap_ismicro) { 1146da6c28aaSamw err = fzap_remove(zn, tx); 1147fa9e4066Sahrens } else { 1148da6c28aaSamw mze = mze_find(zn); 1149fa9e4066Sahrens if (mze == NULL) { 1150be6fd75aSMatthew Ahrens err = SET_ERROR(ENOENT); 1151fa9e4066Sahrens } else { 1152fa9e4066Sahrens zap->zap_m.zap_num_entries--; 1153fa9e4066Sahrens bzero(&zap->zap_m.zap_phys->mz_chunk[mze->mze_chunkid], 1154fa9e4066Sahrens sizeof (mzap_ent_phys_t)); 1155fa9e4066Sahrens mze_remove(zap, mze); 1156fa9e4066Sahrens } 1157fa9e4066Sahrens } 1158da6c28aaSamw zap_name_free(zn); 1159fa9e4066Sahrens zap_unlockdir(zap); 1160fa9e4066Sahrens return (err); 1161fa9e4066Sahrens } 1162fa9e4066Sahrens 1163b24ab676SJeff Bonwick int 1164b24ab676SJeff Bonwick zap_remove_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, 1165b24ab676SJeff Bonwick int key_numints, dmu_tx_t *tx) 1166b24ab676SJeff Bonwick { 1167b24ab676SJeff Bonwick zap_t *zap; 1168b24ab676SJeff Bonwick int err; 1169b24ab676SJeff Bonwick zap_name_t *zn; 1170b24ab676SJeff Bonwick 1171b24ab676SJeff Bonwick err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, FALSE, &zap); 1172b24ab676SJeff Bonwick if (err) 1173b24ab676SJeff Bonwick return (err); 1174b24ab676SJeff Bonwick zn = zap_name_alloc_uint64(zap, key, key_numints); 1175b24ab676SJeff Bonwick if (zn == NULL) { 1176b24ab676SJeff Bonwick zap_unlockdir(zap); 1177be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 1178b24ab676SJeff Bonwick } 1179b24ab676SJeff Bonwick err = fzap_remove(zn, tx); 1180b24ab676SJeff Bonwick zap_name_free(zn); 1181b24ab676SJeff Bonwick zap_unlockdir(zap); 1182b24ab676SJeff Bonwick return (err); 1183b24ab676SJeff Bonwick } 1184b24ab676SJeff Bonwick 1185fa9e4066Sahrens /* 1186fa9e4066Sahrens * Routines for iterating over the attributes. 1187fa9e4066Sahrens */ 1188fa9e4066Sahrens 1189fa9e4066Sahrens void 1190fa9e4066Sahrens zap_cursor_init_serialized(zap_cursor_t *zc, objset_t *os, uint64_t zapobj, 1191fa9e4066Sahrens uint64_t serialized) 1192fa9e4066Sahrens { 1193fa9e4066Sahrens zc->zc_objset = os; 119487e5029aSahrens zc->zc_zap = NULL; 119587e5029aSahrens zc->zc_leaf = NULL; 1196fa9e4066Sahrens zc->zc_zapobj = zapobj; 1197b24ab676SJeff Bonwick zc->zc_serialized = serialized; 1198b24ab676SJeff Bonwick zc->zc_hash = 0; 1199b24ab676SJeff Bonwick zc->zc_cd = 0; 1200fa9e4066Sahrens } 1201fa9e4066Sahrens 120287e5029aSahrens void 120387e5029aSahrens zap_cursor_init(zap_cursor_t *zc, objset_t *os, uint64_t zapobj) 120487e5029aSahrens { 120587e5029aSahrens zap_cursor_init_serialized(zc, os, zapobj, 0); 120687e5029aSahrens } 120787e5029aSahrens 120887e5029aSahrens void 120987e5029aSahrens zap_cursor_fini(zap_cursor_t *zc) 121087e5029aSahrens { 121187e5029aSahrens if (zc->zc_zap) { 121287e5029aSahrens rw_enter(&zc->zc_zap->zap_rwlock, RW_READER); 121387e5029aSahrens zap_unlockdir(zc->zc_zap); 121487e5029aSahrens zc->zc_zap = NULL; 121587e5029aSahrens } 121687e5029aSahrens if (zc->zc_leaf) { 121787e5029aSahrens rw_enter(&zc->zc_leaf->l_rwlock, RW_READER); 121887e5029aSahrens zap_put_leaf(zc->zc_leaf); 121987e5029aSahrens zc->zc_leaf = NULL; 122087e5029aSahrens } 122187e5029aSahrens zc->zc_objset = NULL; 122287e5029aSahrens } 122387e5029aSahrens 1224fa9e4066Sahrens uint64_t 1225fa9e4066Sahrens zap_cursor_serialize(zap_cursor_t *zc) 1226fa9e4066Sahrens { 1227fa9e4066Sahrens if (zc->zc_hash == -1ULL) 1228fa9e4066Sahrens return (-1ULL); 1229b24ab676SJeff Bonwick if (zc->zc_zap == NULL) 1230b24ab676SJeff Bonwick return (zc->zc_serialized); 1231b24ab676SJeff Bonwick ASSERT((zc->zc_hash & zap_maxcd(zc->zc_zap)) == 0); 1232b24ab676SJeff Bonwick ASSERT(zc->zc_cd < zap_maxcd(zc->zc_zap)); 1233b24ab676SJeff Bonwick 1234b24ab676SJeff Bonwick /* 1235b24ab676SJeff Bonwick * We want to keep the high 32 bits of the cursor zero if we can, so 1236b24ab676SJeff Bonwick * that 32-bit programs can access this. So usually use a small 1237b24ab676SJeff Bonwick * (28-bit) hash value so we can fit 4 bits of cd into the low 32-bits 1238b24ab676SJeff Bonwick * of the cursor. 1239b24ab676SJeff Bonwick * 1240b24ab676SJeff Bonwick * [ collision differentiator | zap_hashbits()-bit hash value ] 1241b24ab676SJeff Bonwick */ 1242b24ab676SJeff Bonwick return ((zc->zc_hash >> (64 - zap_hashbits(zc->zc_zap))) | 1243b24ab676SJeff Bonwick ((uint64_t)zc->zc_cd << zap_hashbits(zc->zc_zap))); 1244fa9e4066Sahrens } 1245fa9e4066Sahrens 1246fa9e4066Sahrens int 1247fa9e4066Sahrens zap_cursor_retrieve(zap_cursor_t *zc, zap_attribute_t *za) 1248fa9e4066Sahrens { 1249fa9e4066Sahrens int err; 1250fa9e4066Sahrens avl_index_t idx; 1251fa9e4066Sahrens mzap_ent_t mze_tofind; 1252fa9e4066Sahrens mzap_ent_t *mze; 1253fa9e4066Sahrens 1254fa9e4066Sahrens if (zc->zc_hash == -1ULL) 1255be6fd75aSMatthew Ahrens return (SET_ERROR(ENOENT)); 1256fa9e4066Sahrens 125787e5029aSahrens if (zc->zc_zap == NULL) { 1258b24ab676SJeff Bonwick int hb; 125987e5029aSahrens err = zap_lockdir(zc->zc_objset, zc->zc_zapobj, NULL, 1260c5f9e431Sahrens RW_READER, TRUE, FALSE, &zc->zc_zap); 126187e5029aSahrens if (err) 126287e5029aSahrens return (err); 1263b24ab676SJeff Bonwick 1264b24ab676SJeff Bonwick /* 1265b24ab676SJeff Bonwick * To support zap_cursor_init_serialized, advance, retrieve, 1266b24ab676SJeff Bonwick * we must add to the existing zc_cd, which may already 1267b24ab676SJeff Bonwick * be 1 due to the zap_cursor_advance. 1268b24ab676SJeff Bonwick */ 1269b24ab676SJeff Bonwick ASSERT(zc->zc_hash == 0); 1270b24ab676SJeff Bonwick hb = zap_hashbits(zc->zc_zap); 1271b24ab676SJeff Bonwick zc->zc_hash = zc->zc_serialized << (64 - hb); 1272b24ab676SJeff Bonwick zc->zc_cd += zc->zc_serialized >> hb; 1273b24ab676SJeff Bonwick if (zc->zc_cd >= zap_maxcd(zc->zc_zap)) /* corrupt serialized */ 1274b24ab676SJeff Bonwick zc->zc_cd = 0; 127587e5029aSahrens } else { 127687e5029aSahrens rw_enter(&zc->zc_zap->zap_rwlock, RW_READER); 127787e5029aSahrens } 127887e5029aSahrens if (!zc->zc_zap->zap_ismicro) { 127987e5029aSahrens err = fzap_cursor_retrieve(zc->zc_zap, zc, za); 1280fa9e4066Sahrens } else { 1281fa9e4066Sahrens mze_tofind.mze_hash = zc->zc_hash; 12823f9d6ad7SLin Ling mze_tofind.mze_cd = zc->zc_cd; 1283fa9e4066Sahrens 128487e5029aSahrens mze = avl_find(&zc->zc_zap->zap_m.zap_avl, &mze_tofind, &idx); 128587e5029aSahrens if (mze == NULL) { 128687e5029aSahrens mze = avl_nearest(&zc->zc_zap->zap_m.zap_avl, 128787e5029aSahrens idx, AVL_AFTER); 128887e5029aSahrens } 1289fa9e4066Sahrens if (mze) { 12903f9d6ad7SLin Ling mzap_ent_phys_t *mzep = MZE_PHYS(zc->zc_zap, mze); 12913f9d6ad7SLin Ling ASSERT3U(mze->mze_cd, ==, mzep->mze_cd); 1292da6c28aaSamw za->za_normalization_conflict = 1293da6c28aaSamw mzap_normalization_conflict(zc->zc_zap, NULL, mze); 1294fa9e4066Sahrens za->za_integer_length = 8; 1295fa9e4066Sahrens za->za_num_integers = 1; 12963f9d6ad7SLin Ling za->za_first_integer = mzep->mze_value; 12973f9d6ad7SLin Ling (void) strcpy(za->za_name, mzep->mze_name); 1298fa9e4066Sahrens zc->zc_hash = mze->mze_hash; 12993f9d6ad7SLin Ling zc->zc_cd = mze->mze_cd; 1300fa9e4066Sahrens err = 0; 1301fa9e4066Sahrens } else { 1302fa9e4066Sahrens zc->zc_hash = -1ULL; 1303be6fd75aSMatthew Ahrens err = SET_ERROR(ENOENT); 1304fa9e4066Sahrens } 1305fa9e4066Sahrens } 130687e5029aSahrens rw_exit(&zc->zc_zap->zap_rwlock); 1307fa9e4066Sahrens return (err); 1308fa9e4066Sahrens } 1309fa9e4066Sahrens 1310fa9e4066Sahrens void 1311fa9e4066Sahrens zap_cursor_advance(zap_cursor_t *zc) 1312fa9e4066Sahrens { 1313fa9e4066Sahrens if (zc->zc_hash == -1ULL) 1314fa9e4066Sahrens return; 1315fa9e4066Sahrens zc->zc_cd++; 1316fa9e4066Sahrens } 1317fa9e4066Sahrens 1318fa9e4066Sahrens int 1319fa9e4066Sahrens zap_get_stats(objset_t *os, uint64_t zapobj, zap_stats_t *zs) 1320fa9e4066Sahrens { 1321fa9e4066Sahrens int err; 1322fa9e4066Sahrens zap_t *zap; 1323fa9e4066Sahrens 1324c5f9e431Sahrens err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); 1325fa9e4066Sahrens if (err) 1326fa9e4066Sahrens return (err); 1327fa9e4066Sahrens 1328fa9e4066Sahrens bzero(zs, sizeof (zap_stats_t)); 1329fa9e4066Sahrens 1330fa9e4066Sahrens if (zap->zap_ismicro) { 1331fa9e4066Sahrens zs->zs_blocksize = zap->zap_dbuf->db_size; 1332fa9e4066Sahrens zs->zs_num_entries = zap->zap_m.zap_num_entries; 1333fa9e4066Sahrens zs->zs_num_blocks = 1; 1334fa9e4066Sahrens } else { 1335fa9e4066Sahrens fzap_get_stats(zap, zs); 1336fa9e4066Sahrens } 1337fa9e4066Sahrens zap_unlockdir(zap); 1338fa9e4066Sahrens return (0); 1339fa9e4066Sahrens } 13403d692628SSanjeev Bagewadi 13413d692628SSanjeev Bagewadi int 13423d692628SSanjeev Bagewadi zap_count_write(objset_t *os, uint64_t zapobj, const char *name, int add, 1343720d1aa1SSanjeev Bagewadi uint64_t *towrite, uint64_t *tooverwrite) 13443d692628SSanjeev Bagewadi { 13453d692628SSanjeev Bagewadi zap_t *zap; 13463d692628SSanjeev Bagewadi int err = 0; 13473d692628SSanjeev Bagewadi 13483d692628SSanjeev Bagewadi 13493d692628SSanjeev Bagewadi /* 13503d692628SSanjeev Bagewadi * Since, we don't have a name, we cannot figure out which blocks will 13513d692628SSanjeev Bagewadi * be affected in this operation. So, account for the worst case : 13523d692628SSanjeev Bagewadi * - 3 blocks overwritten: target leaf, ptrtbl block, header block 13533d692628SSanjeev Bagewadi * - 4 new blocks written if adding: 13543d692628SSanjeev Bagewadi * - 2 blocks for possibly split leaves, 13553d692628SSanjeev Bagewadi * - 2 grown ptrtbl blocks 13563d692628SSanjeev Bagewadi * 13573d692628SSanjeev Bagewadi * This also accomodates the case where an add operation to a fairly 13583d692628SSanjeev Bagewadi * large microzap results in a promotion to fatzap. 13593d692628SSanjeev Bagewadi */ 13603d692628SSanjeev Bagewadi if (name == NULL) { 13613d692628SSanjeev Bagewadi *towrite += (3 + (add ? 4 : 0)) * SPA_MAXBLOCKSIZE; 13623d692628SSanjeev Bagewadi return (err); 13633d692628SSanjeev Bagewadi } 13643d692628SSanjeev Bagewadi 13653d692628SSanjeev Bagewadi /* 136619b94df9SMatthew Ahrens * We lock the zap with adding == FALSE. Because, if we pass 13673d692628SSanjeev Bagewadi * the actual value of add, it could trigger a mzap_upgrade(). 13683d692628SSanjeev Bagewadi * At present we are just evaluating the possibility of this operation 13693d692628SSanjeev Bagewadi * and hence we donot want to trigger an upgrade. 13703d692628SSanjeev Bagewadi */ 13713d692628SSanjeev Bagewadi err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); 13723d692628SSanjeev Bagewadi if (err) 13733d692628SSanjeev Bagewadi return (err); 13743d692628SSanjeev Bagewadi 13753d692628SSanjeev Bagewadi if (!zap->zap_ismicro) { 13763d692628SSanjeev Bagewadi zap_name_t *zn = zap_name_alloc(zap, name, MT_EXACT); 13773d692628SSanjeev Bagewadi if (zn) { 13783d692628SSanjeev Bagewadi err = fzap_count_write(zn, add, towrite, 13793d692628SSanjeev Bagewadi tooverwrite); 13803d692628SSanjeev Bagewadi zap_name_free(zn); 13813d692628SSanjeev Bagewadi } else { 13823d692628SSanjeev Bagewadi /* 13833d692628SSanjeev Bagewadi * We treat this case as similar to (name == NULL) 13843d692628SSanjeev Bagewadi */ 13853d692628SSanjeev Bagewadi *towrite += (3 + (add ? 4 : 0)) * SPA_MAXBLOCKSIZE; 13863d692628SSanjeev Bagewadi } 13873d692628SSanjeev Bagewadi } else { 1388720d1aa1SSanjeev Bagewadi /* 1389720d1aa1SSanjeev Bagewadi * We are here if (name != NULL) and this is a micro-zap. 1390720d1aa1SSanjeev Bagewadi * We account for the header block depending on whether it 1391720d1aa1SSanjeev Bagewadi * is freeable. 1392720d1aa1SSanjeev Bagewadi * 1393720d1aa1SSanjeev Bagewadi * Incase of an add-operation it is hard to find out 1394720d1aa1SSanjeev Bagewadi * if this add will promote this microzap to fatzap. 1395720d1aa1SSanjeev Bagewadi * Hence, we consider the worst case and account for the 1396720d1aa1SSanjeev Bagewadi * blocks assuming this microzap would be promoted to a 1397720d1aa1SSanjeev Bagewadi * fatzap. 1398720d1aa1SSanjeev Bagewadi * 1399720d1aa1SSanjeev Bagewadi * 1 block overwritten : header block 1400720d1aa1SSanjeev Bagewadi * 4 new blocks written : 2 new split leaf, 2 grown 1401720d1aa1SSanjeev Bagewadi * ptrtbl blocks 1402720d1aa1SSanjeev Bagewadi */ 1403720d1aa1SSanjeev Bagewadi if (dmu_buf_freeable(zap->zap_dbuf)) 1404720d1aa1SSanjeev Bagewadi *tooverwrite += SPA_MAXBLOCKSIZE; 1405720d1aa1SSanjeev Bagewadi else 1406720d1aa1SSanjeev Bagewadi *towrite += SPA_MAXBLOCKSIZE; 1407720d1aa1SSanjeev Bagewadi 1408720d1aa1SSanjeev Bagewadi if (add) { 1409720d1aa1SSanjeev Bagewadi *towrite += 4 * SPA_MAXBLOCKSIZE; 14103d692628SSanjeev Bagewadi } 14113d692628SSanjeev Bagewadi } 14123d692628SSanjeev Bagewadi 14133d692628SSanjeev Bagewadi zap_unlockdir(zap); 14143d692628SSanjeev Bagewadi return (err); 14153d692628SSanjeev Bagewadi } 1416