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. 23fa9e4066Sahrens */ 24fa9e4066Sahrens 25b24ab676SJeff Bonwick #include <sys/zio.h> 26fa9e4066Sahrens #include <sys/spa.h> 27fa9e4066Sahrens #include <sys/dmu.h> 28fa9e4066Sahrens #include <sys/zfs_context.h> 29fa9e4066Sahrens #include <sys/zap.h> 30ea8dc4b6Seschrock #include <sys/refcount.h> 31fa9e4066Sahrens #include <sys/zap_impl.h> 3287e5029aSahrens #include <sys/zap_leaf.h> 33fa9e4066Sahrens #include <sys/avl.h> 34*3f9d6ad7SLin Ling #include <sys/arc.h> 35de8267e0Stimh 36de8267e0Stimh #ifdef _KERNEL 37de8267e0Stimh #include <sys/sunddi.h> 38de8267e0Stimh #endif 39fa9e4066Sahrens 40b24ab676SJeff Bonwick static int mzap_upgrade(zap_t **zapp, dmu_tx_t *tx, zap_flags_t flags); 41fa9e4066Sahrens 42b24ab676SJeff Bonwick uint64_t 43b24ab676SJeff Bonwick zap_getflags(zap_t *zap) 44b24ab676SJeff Bonwick { 45b24ab676SJeff Bonwick if (zap->zap_ismicro) 46b24ab676SJeff Bonwick return (0); 47b24ab676SJeff Bonwick return (zap->zap_u.zap_fat.zap_phys->zap_flags); 48b24ab676SJeff Bonwick } 49b24ab676SJeff Bonwick 50b24ab676SJeff Bonwick int 51b24ab676SJeff Bonwick zap_hashbits(zap_t *zap) 52b24ab676SJeff Bonwick { 53b24ab676SJeff Bonwick if (zap_getflags(zap) & ZAP_FLAG_HASH64) 54b24ab676SJeff Bonwick return (48); 55b24ab676SJeff Bonwick else 56b24ab676SJeff Bonwick return (28); 57b24ab676SJeff Bonwick } 58b24ab676SJeff Bonwick 59b24ab676SJeff Bonwick uint32_t 60b24ab676SJeff Bonwick zap_maxcd(zap_t *zap) 61b24ab676SJeff Bonwick { 62b24ab676SJeff Bonwick if (zap_getflags(zap) & ZAP_FLAG_HASH64) 63b24ab676SJeff Bonwick return ((1<<16)-1); 64b24ab676SJeff Bonwick else 65b24ab676SJeff Bonwick return (-1U); 66b24ab676SJeff Bonwick } 67fa9e4066Sahrens 68da6c28aaSamw static uint64_t 69b24ab676SJeff Bonwick zap_hash(zap_name_t *zn) 70da6c28aaSamw { 71b24ab676SJeff Bonwick zap_t *zap = zn->zn_zap; 72b24ab676SJeff Bonwick uint64_t h = 0; 73da6c28aaSamw 74b24ab676SJeff Bonwick if (zap_getflags(zap) & ZAP_FLAG_PRE_HASHED_KEY) { 75b24ab676SJeff Bonwick ASSERT(zap_getflags(zap) & ZAP_FLAG_UINT64_KEY); 76b24ab676SJeff Bonwick h = *(uint64_t *)zn->zn_key_orig; 77b24ab676SJeff Bonwick } else { 78b24ab676SJeff Bonwick h = zap->zap_salt; 79b24ab676SJeff Bonwick ASSERT(h != 0); 80b24ab676SJeff Bonwick ASSERT(zfs_crc64_table[128] == ZFS_CRC64_POLY); 81b24ab676SJeff Bonwick 82486ae710SMatthew Ahrens if (zap_getflags(zap) & ZAP_FLAG_UINT64_KEY) { 83486ae710SMatthew Ahrens int i; 84486ae710SMatthew Ahrens const uint64_t *wp = zn->zn_key_norm; 85486ae710SMatthew Ahrens 86486ae710SMatthew Ahrens ASSERT(zn->zn_key_intlen == 8); 87486ae710SMatthew Ahrens for (i = 0; i < zn->zn_key_norm_numints; wp++, i++) { 88486ae710SMatthew Ahrens int j; 89486ae710SMatthew Ahrens uint64_t word = *wp; 90486ae710SMatthew Ahrens 91486ae710SMatthew Ahrens for (j = 0; j < zn->zn_key_intlen; j++) { 92486ae710SMatthew Ahrens h = (h >> 8) ^ 93486ae710SMatthew Ahrens zfs_crc64_table[(h ^ word) & 0xFF]; 94486ae710SMatthew Ahrens word >>= NBBY; 95486ae710SMatthew Ahrens } 96486ae710SMatthew Ahrens } 97486ae710SMatthew Ahrens } else { 98486ae710SMatthew Ahrens int i, len; 99486ae710SMatthew Ahrens const uint8_t *cp = zn->zn_key_norm; 100486ae710SMatthew Ahrens 101486ae710SMatthew Ahrens /* 102486ae710SMatthew Ahrens * We previously stored the terminating null on 103486ae710SMatthew Ahrens * disk, but didn't hash it, so we need to 104486ae710SMatthew Ahrens * continue to not hash it. (The 105486ae710SMatthew Ahrens * zn_key_*_numints includes the terminating 106486ae710SMatthew Ahrens * null for non-binary keys.) 107486ae710SMatthew Ahrens */ 108486ae710SMatthew Ahrens len = zn->zn_key_norm_numints - 1; 109486ae710SMatthew Ahrens 110486ae710SMatthew Ahrens ASSERT(zn->zn_key_intlen == 1); 111486ae710SMatthew Ahrens for (i = 0; i < len; cp++, i++) { 112486ae710SMatthew Ahrens h = (h >> 8) ^ 113486ae710SMatthew Ahrens zfs_crc64_table[(h ^ *cp) & 0xFF]; 114486ae710SMatthew Ahrens } 115486ae710SMatthew Ahrens } 116b24ab676SJeff Bonwick } 117da6c28aaSamw /* 118b24ab676SJeff Bonwick * Don't use all 64 bits, since we need some in the cookie for 119b24ab676SJeff Bonwick * the collision differentiator. We MUST use the high bits, 120b24ab676SJeff Bonwick * since those are the ones that we first pay attention to when 121da6c28aaSamw * chosing the bucket. 122da6c28aaSamw */ 123b24ab676SJeff Bonwick h &= ~((1ULL << (64 - zap_hashbits(zap))) - 1); 124da6c28aaSamw 125b24ab676SJeff Bonwick return (h); 126da6c28aaSamw } 127da6c28aaSamw 128da6c28aaSamw static int 129da6c28aaSamw zap_normalize(zap_t *zap, const char *name, char *namenorm) 130da6c28aaSamw { 131da6c28aaSamw size_t inlen, outlen; 132da6c28aaSamw int err; 133da6c28aaSamw 134b24ab676SJeff Bonwick ASSERT(!(zap_getflags(zap) & ZAP_FLAG_UINT64_KEY)); 135b24ab676SJeff Bonwick 136da6c28aaSamw inlen = strlen(name) + 1; 137da6c28aaSamw outlen = ZAP_MAXNAMELEN; 138da6c28aaSamw 139da6c28aaSamw err = 0; 140da6c28aaSamw (void) u8_textprep_str((char *)name, &inlen, namenorm, &outlen, 141d05ba1e6STim Haley zap->zap_normflags | U8_TEXTPREP_IGNORE_NULL | 142d05ba1e6STim Haley U8_TEXTPREP_IGNORE_INVALID, U8_UNICODE_LATEST, &err); 143da6c28aaSamw 144da6c28aaSamw return (err); 145da6c28aaSamw } 146da6c28aaSamw 147da6c28aaSamw boolean_t 148da6c28aaSamw zap_match(zap_name_t *zn, const char *matchname) 149da6c28aaSamw { 150b24ab676SJeff Bonwick ASSERT(!(zap_getflags(zn->zn_zap) & ZAP_FLAG_UINT64_KEY)); 151b24ab676SJeff Bonwick 152da6c28aaSamw if (zn->zn_matchtype == MT_FIRST) { 153da6c28aaSamw char norm[ZAP_MAXNAMELEN]; 154da6c28aaSamw 155da6c28aaSamw if (zap_normalize(zn->zn_zap, matchname, norm) != 0) 156da6c28aaSamw return (B_FALSE); 157da6c28aaSamw 158b24ab676SJeff Bonwick return (strcmp(zn->zn_key_norm, norm) == 0); 159da6c28aaSamw } else { 160da6c28aaSamw /* MT_BEST or MT_EXACT */ 161b24ab676SJeff Bonwick return (strcmp(zn->zn_key_orig, matchname) == 0); 162da6c28aaSamw } 163da6c28aaSamw } 164da6c28aaSamw 165da6c28aaSamw void 166da6c28aaSamw zap_name_free(zap_name_t *zn) 167da6c28aaSamw { 168da6c28aaSamw kmem_free(zn, sizeof (zap_name_t)); 169da6c28aaSamw } 170da6c28aaSamw 171da6c28aaSamw zap_name_t * 172b24ab676SJeff Bonwick zap_name_alloc(zap_t *zap, const char *key, matchtype_t mt) 173da6c28aaSamw { 174da6c28aaSamw zap_name_t *zn = kmem_alloc(sizeof (zap_name_t), KM_SLEEP); 175da6c28aaSamw 176da6c28aaSamw zn->zn_zap = zap; 177b24ab676SJeff Bonwick zn->zn_key_intlen = sizeof (*key); 178b24ab676SJeff Bonwick zn->zn_key_orig = key; 179486ae710SMatthew Ahrens zn->zn_key_orig_numints = strlen(zn->zn_key_orig) + 1; 180da6c28aaSamw zn->zn_matchtype = mt; 181da6c28aaSamw if (zap->zap_normflags) { 182b24ab676SJeff Bonwick if (zap_normalize(zap, key, zn->zn_normbuf) != 0) { 183da6c28aaSamw zap_name_free(zn); 184da6c28aaSamw return (NULL); 185da6c28aaSamw } 186b24ab676SJeff Bonwick zn->zn_key_norm = zn->zn_normbuf; 187486ae710SMatthew Ahrens zn->zn_key_norm_numints = strlen(zn->zn_key_norm) + 1; 188da6c28aaSamw } else { 189da6c28aaSamw if (mt != MT_EXACT) { 190da6c28aaSamw zap_name_free(zn); 191da6c28aaSamw return (NULL); 192da6c28aaSamw } 193b24ab676SJeff Bonwick zn->zn_key_norm = zn->zn_key_orig; 194486ae710SMatthew Ahrens zn->zn_key_norm_numints = zn->zn_key_orig_numints; 195da6c28aaSamw } 196da6c28aaSamw 197b24ab676SJeff Bonwick zn->zn_hash = zap_hash(zn); 198b24ab676SJeff Bonwick return (zn); 199b24ab676SJeff Bonwick } 200b24ab676SJeff Bonwick 201b24ab676SJeff Bonwick zap_name_t * 202b24ab676SJeff Bonwick zap_name_alloc_uint64(zap_t *zap, const uint64_t *key, int numints) 203b24ab676SJeff Bonwick { 204b24ab676SJeff Bonwick zap_name_t *zn = kmem_alloc(sizeof (zap_name_t), KM_SLEEP); 205b24ab676SJeff Bonwick 206b24ab676SJeff Bonwick ASSERT(zap->zap_normflags == 0); 207b24ab676SJeff Bonwick zn->zn_zap = zap; 208b24ab676SJeff Bonwick zn->zn_key_intlen = sizeof (*key); 209b24ab676SJeff Bonwick zn->zn_key_orig = zn->zn_key_norm = key; 210486ae710SMatthew Ahrens zn->zn_key_orig_numints = zn->zn_key_norm_numints = numints; 211b24ab676SJeff Bonwick zn->zn_matchtype = MT_EXACT; 212b24ab676SJeff Bonwick 213b24ab676SJeff Bonwick zn->zn_hash = zap_hash(zn); 214da6c28aaSamw return (zn); 215da6c28aaSamw } 216da6c28aaSamw 217fa9e4066Sahrens static void 218fa9e4066Sahrens mzap_byteswap(mzap_phys_t *buf, size_t size) 219fa9e4066Sahrens { 220fa9e4066Sahrens int i, max; 221fa9e4066Sahrens buf->mz_block_type = BSWAP_64(buf->mz_block_type); 222fa9e4066Sahrens buf->mz_salt = BSWAP_64(buf->mz_salt); 223ab04eb8eStimh buf->mz_normflags = BSWAP_64(buf->mz_normflags); 224fa9e4066Sahrens max = (size / MZAP_ENT_LEN) - 1; 225fa9e4066Sahrens for (i = 0; i < max; i++) { 226fa9e4066Sahrens buf->mz_chunk[i].mze_value = 227fa9e4066Sahrens BSWAP_64(buf->mz_chunk[i].mze_value); 228fa9e4066Sahrens buf->mz_chunk[i].mze_cd = 229fa9e4066Sahrens BSWAP_32(buf->mz_chunk[i].mze_cd); 230fa9e4066Sahrens } 231fa9e4066Sahrens } 232fa9e4066Sahrens 233fa9e4066Sahrens void 234fa9e4066Sahrens zap_byteswap(void *buf, size_t size) 235fa9e4066Sahrens { 236fa9e4066Sahrens uint64_t block_type; 237fa9e4066Sahrens 238fa9e4066Sahrens block_type = *(uint64_t *)buf; 239fa9e4066Sahrens 2405ad82045Snd if (block_type == ZBT_MICRO || block_type == BSWAP_64(ZBT_MICRO)) { 241fa9e4066Sahrens /* ASSERT(magic == ZAP_LEAF_MAGIC); */ 242fa9e4066Sahrens mzap_byteswap(buf, size); 2435ad82045Snd } else { 244fa9e4066Sahrens fzap_byteswap(buf, size); 245fa9e4066Sahrens } 246fa9e4066Sahrens } 247fa9e4066Sahrens 248fa9e4066Sahrens static int 249fa9e4066Sahrens mze_compare(const void *arg1, const void *arg2) 250fa9e4066Sahrens { 251fa9e4066Sahrens const mzap_ent_t *mze1 = arg1; 252fa9e4066Sahrens const mzap_ent_t *mze2 = arg2; 253fa9e4066Sahrens 254fa9e4066Sahrens if (mze1->mze_hash > mze2->mze_hash) 255fa9e4066Sahrens return (+1); 256fa9e4066Sahrens if (mze1->mze_hash < mze2->mze_hash) 257fa9e4066Sahrens return (-1); 258*3f9d6ad7SLin Ling if (mze1->mze_cd > mze2->mze_cd) 259fa9e4066Sahrens return (+1); 260*3f9d6ad7SLin Ling if (mze1->mze_cd < mze2->mze_cd) 261fa9e4066Sahrens return (-1); 262fa9e4066Sahrens return (0); 263fa9e4066Sahrens } 264fa9e4066Sahrens 265fa9e4066Sahrens static void 266*3f9d6ad7SLin Ling mze_insert(zap_t *zap, int chunkid, uint64_t hash) 267fa9e4066Sahrens { 268fa9e4066Sahrens mzap_ent_t *mze; 269fa9e4066Sahrens 270fa9e4066Sahrens ASSERT(zap->zap_ismicro); 271fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 272fa9e4066Sahrens 273fa9e4066Sahrens mze = kmem_alloc(sizeof (mzap_ent_t), KM_SLEEP); 274fa9e4066Sahrens mze->mze_chunkid = chunkid; 275fa9e4066Sahrens mze->mze_hash = hash; 276*3f9d6ad7SLin Ling mze->mze_cd = MZE_PHYS(zap, mze)->mze_cd; 277*3f9d6ad7SLin Ling ASSERT(MZE_PHYS(zap, mze)->mze_name[0] != 0); 278fa9e4066Sahrens avl_add(&zap->zap_m.zap_avl, mze); 279fa9e4066Sahrens } 280fa9e4066Sahrens 281fa9e4066Sahrens static mzap_ent_t * 282da6c28aaSamw mze_find(zap_name_t *zn) 283fa9e4066Sahrens { 284fa9e4066Sahrens mzap_ent_t mze_tofind; 285fa9e4066Sahrens mzap_ent_t *mze; 286fa9e4066Sahrens avl_index_t idx; 287da6c28aaSamw avl_tree_t *avl = &zn->zn_zap->zap_m.zap_avl; 288fa9e4066Sahrens 289da6c28aaSamw ASSERT(zn->zn_zap->zap_ismicro); 290da6c28aaSamw ASSERT(RW_LOCK_HELD(&zn->zn_zap->zap_rwlock)); 291fa9e4066Sahrens 292da6c28aaSamw mze_tofind.mze_hash = zn->zn_hash; 293*3f9d6ad7SLin Ling mze_tofind.mze_cd = 0; 294fa9e4066Sahrens 295da6c28aaSamw again: 296fa9e4066Sahrens mze = avl_find(avl, &mze_tofind, &idx); 297fa9e4066Sahrens if (mze == NULL) 298fa9e4066Sahrens mze = avl_nearest(avl, idx, AVL_AFTER); 299da6c28aaSamw for (; mze && mze->mze_hash == zn->zn_hash; mze = AVL_NEXT(avl, mze)) { 300*3f9d6ad7SLin Ling ASSERT3U(mze->mze_cd, ==, MZE_PHYS(zn->zn_zap, mze)->mze_cd); 301*3f9d6ad7SLin Ling if (zap_match(zn, MZE_PHYS(zn->zn_zap, mze)->mze_name)) 302fa9e4066Sahrens return (mze); 303fa9e4066Sahrens } 304da6c28aaSamw if (zn->zn_matchtype == MT_BEST) { 305da6c28aaSamw zn->zn_matchtype = MT_FIRST; 306da6c28aaSamw goto again; 307da6c28aaSamw } 308fa9e4066Sahrens return (NULL); 309fa9e4066Sahrens } 310fa9e4066Sahrens 311fa9e4066Sahrens static uint32_t 312fa9e4066Sahrens mze_find_unused_cd(zap_t *zap, uint64_t hash) 313fa9e4066Sahrens { 314fa9e4066Sahrens mzap_ent_t mze_tofind; 315fa9e4066Sahrens mzap_ent_t *mze; 316fa9e4066Sahrens avl_index_t idx; 317fa9e4066Sahrens avl_tree_t *avl = &zap->zap_m.zap_avl; 318fa9e4066Sahrens uint32_t cd; 319fa9e4066Sahrens 320fa9e4066Sahrens ASSERT(zap->zap_ismicro); 321fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 322fa9e4066Sahrens 323fa9e4066Sahrens mze_tofind.mze_hash = hash; 324*3f9d6ad7SLin Ling mze_tofind.mze_cd = 0; 325fa9e4066Sahrens 326fa9e4066Sahrens cd = 0; 327fa9e4066Sahrens for (mze = avl_find(avl, &mze_tofind, &idx); 328fa9e4066Sahrens mze && mze->mze_hash == hash; mze = AVL_NEXT(avl, mze)) { 329*3f9d6ad7SLin Ling if (mze->mze_cd != cd) 330fa9e4066Sahrens break; 331fa9e4066Sahrens cd++; 332fa9e4066Sahrens } 333fa9e4066Sahrens 334fa9e4066Sahrens return (cd); 335fa9e4066Sahrens } 336fa9e4066Sahrens 337fa9e4066Sahrens static void 338fa9e4066Sahrens mze_remove(zap_t *zap, mzap_ent_t *mze) 339fa9e4066Sahrens { 340fa9e4066Sahrens ASSERT(zap->zap_ismicro); 341fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 342fa9e4066Sahrens 343fa9e4066Sahrens avl_remove(&zap->zap_m.zap_avl, mze); 344fa9e4066Sahrens kmem_free(mze, sizeof (mzap_ent_t)); 345fa9e4066Sahrens } 346fa9e4066Sahrens 347fa9e4066Sahrens static void 348fa9e4066Sahrens mze_destroy(zap_t *zap) 349fa9e4066Sahrens { 350fa9e4066Sahrens mzap_ent_t *mze; 351fa9e4066Sahrens void *avlcookie = NULL; 352fa9e4066Sahrens 353fa9e4066Sahrens while (mze = avl_destroy_nodes(&zap->zap_m.zap_avl, &avlcookie)) 354fa9e4066Sahrens kmem_free(mze, sizeof (mzap_ent_t)); 355fa9e4066Sahrens avl_destroy(&zap->zap_m.zap_avl); 356fa9e4066Sahrens } 357fa9e4066Sahrens 358fa9e4066Sahrens static zap_t * 359fa9e4066Sahrens mzap_open(objset_t *os, uint64_t obj, dmu_buf_t *db) 360fa9e4066Sahrens { 361fa9e4066Sahrens zap_t *winner; 362fa9e4066Sahrens zap_t *zap; 363fa9e4066Sahrens int i; 364fa9e4066Sahrens 365fa9e4066Sahrens ASSERT3U(MZAP_ENT_LEN, ==, sizeof (mzap_ent_phys_t)); 366fa9e4066Sahrens 367fa9e4066Sahrens zap = kmem_zalloc(sizeof (zap_t), KM_SLEEP); 368fa9e4066Sahrens rw_init(&zap->zap_rwlock, 0, 0, 0); 369fa9e4066Sahrens rw_enter(&zap->zap_rwlock, RW_WRITER); 370fa9e4066Sahrens zap->zap_objset = os; 371fa9e4066Sahrens zap->zap_object = obj; 372fa9e4066Sahrens zap->zap_dbuf = db; 373fa9e4066Sahrens 374da6c28aaSamw if (*(uint64_t *)db->db_data != ZBT_MICRO) { 375fa9e4066Sahrens mutex_init(&zap->zap_f.zap_num_entries_mtx, 0, 0, 0); 376f65e61c0Sahrens zap->zap_f.zap_block_shift = highbit(db->db_size) - 1; 377fa9e4066Sahrens } else { 378fa9e4066Sahrens zap->zap_ismicro = TRUE; 379fa9e4066Sahrens } 380fa9e4066Sahrens 381fa9e4066Sahrens /* 382fa9e4066Sahrens * Make sure that zap_ismicro is set before we let others see 383fa9e4066Sahrens * it, because zap_lockdir() checks zap_ismicro without the lock 384fa9e4066Sahrens * held. 385fa9e4066Sahrens */ 386455d5089Sahrens winner = dmu_buf_set_user(db, zap, &zap->zap_m.zap_phys, zap_evict); 387fa9e4066Sahrens 388fa9e4066Sahrens if (winner != NULL) { 389c25056deSgw rw_exit(&zap->zap_rwlock); 390c25056deSgw rw_destroy(&zap->zap_rwlock); 391c25056deSgw if (!zap->zap_ismicro) 392c25056deSgw mutex_destroy(&zap->zap_f.zap_num_entries_mtx); 393fa9e4066Sahrens kmem_free(zap, sizeof (zap_t)); 394fa9e4066Sahrens return (winner); 395fa9e4066Sahrens } 396fa9e4066Sahrens 397fa9e4066Sahrens if (zap->zap_ismicro) { 398fa9e4066Sahrens zap->zap_salt = zap->zap_m.zap_phys->mz_salt; 399da6c28aaSamw zap->zap_normflags = zap->zap_m.zap_phys->mz_normflags; 400fa9e4066Sahrens zap->zap_m.zap_num_chunks = db->db_size / MZAP_ENT_LEN - 1; 401fa9e4066Sahrens avl_create(&zap->zap_m.zap_avl, mze_compare, 402fa9e4066Sahrens sizeof (mzap_ent_t), offsetof(mzap_ent_t, mze_node)); 403fa9e4066Sahrens 404fa9e4066Sahrens for (i = 0; i < zap->zap_m.zap_num_chunks; i++) { 405fa9e4066Sahrens mzap_ent_phys_t *mze = 406fa9e4066Sahrens &zap->zap_m.zap_phys->mz_chunk[i]; 407fa9e4066Sahrens if (mze->mze_name[0]) { 408da6c28aaSamw zap_name_t *zn; 409da6c28aaSamw 410fa9e4066Sahrens zap->zap_m.zap_num_entries++; 411da6c28aaSamw zn = zap_name_alloc(zap, mze->mze_name, 412da6c28aaSamw MT_EXACT); 413*3f9d6ad7SLin Ling mze_insert(zap, i, zn->zn_hash); 414da6c28aaSamw zap_name_free(zn); 415fa9e4066Sahrens } 416fa9e4066Sahrens } 417fa9e4066Sahrens } else { 418fa9e4066Sahrens zap->zap_salt = zap->zap_f.zap_phys->zap_salt; 419da6c28aaSamw zap->zap_normflags = zap->zap_f.zap_phys->zap_normflags; 420f65e61c0Sahrens 421f65e61c0Sahrens ASSERT3U(sizeof (struct zap_leaf_header), ==, 422f65e61c0Sahrens 2*ZAP_LEAF_CHUNKSIZE); 423f65e61c0Sahrens 424f65e61c0Sahrens /* 425f65e61c0Sahrens * The embedded pointer table should not overlap the 426f65e61c0Sahrens * other members. 427f65e61c0Sahrens */ 428f65e61c0Sahrens ASSERT3P(&ZAP_EMBEDDED_PTRTBL_ENT(zap, 0), >, 429f65e61c0Sahrens &zap->zap_f.zap_phys->zap_salt); 430f65e61c0Sahrens 431f65e61c0Sahrens /* 432f65e61c0Sahrens * The embedded pointer table should end at the end of 433f65e61c0Sahrens * the block 434f65e61c0Sahrens */ 435f65e61c0Sahrens ASSERT3U((uintptr_t)&ZAP_EMBEDDED_PTRTBL_ENT(zap, 436f65e61c0Sahrens 1<<ZAP_EMBEDDED_PTRTBL_SHIFT(zap)) - 437f65e61c0Sahrens (uintptr_t)zap->zap_f.zap_phys, ==, 438f65e61c0Sahrens zap->zap_dbuf->db_size); 439fa9e4066Sahrens } 440fa9e4066Sahrens rw_exit(&zap->zap_rwlock); 441fa9e4066Sahrens return (zap); 442fa9e4066Sahrens } 443fa9e4066Sahrens 444fa9e4066Sahrens int 445fa9e4066Sahrens zap_lockdir(objset_t *os, uint64_t obj, dmu_tx_t *tx, 446c5f9e431Sahrens krw_t lti, boolean_t fatreader, boolean_t adding, zap_t **zapp) 447fa9e4066Sahrens { 448fa9e4066Sahrens zap_t *zap; 449fa9e4066Sahrens dmu_buf_t *db; 450fa9e4066Sahrens krw_t lt; 451fa9e4066Sahrens int err; 452fa9e4066Sahrens 453fa9e4066Sahrens *zapp = NULL; 454fa9e4066Sahrens 45547cb52daSJeff Bonwick err = dmu_buf_hold(os, obj, 0, NULL, &db, DMU_READ_NO_PREFETCH); 456ea8dc4b6Seschrock if (err) 457ea8dc4b6Seschrock return (err); 458fa9e4066Sahrens 459fa9e4066Sahrens #ifdef ZFS_DEBUG 460fa9e4066Sahrens { 461fa9e4066Sahrens dmu_object_info_t doi; 462fa9e4066Sahrens dmu_object_info_from_db(db, &doi); 463fa9e4066Sahrens ASSERT(dmu_ot[doi.doi_type].ot_byteswap == zap_byteswap); 464fa9e4066Sahrens } 465fa9e4066Sahrens #endif 466fa9e4066Sahrens 467fa9e4066Sahrens zap = dmu_buf_get_user(db); 468fa9e4066Sahrens if (zap == NULL) 469fa9e4066Sahrens zap = mzap_open(os, obj, db); 470fa9e4066Sahrens 471fa9e4066Sahrens /* 472fa9e4066Sahrens * We're checking zap_ismicro without the lock held, in order to 473fa9e4066Sahrens * tell what type of lock we want. Once we have some sort of 474fa9e4066Sahrens * lock, see if it really is the right type. In practice this 475fa9e4066Sahrens * can only be different if it was upgraded from micro to fat, 476fa9e4066Sahrens * and micro wanted WRITER but fat only needs READER. 477fa9e4066Sahrens */ 478fa9e4066Sahrens lt = (!zap->zap_ismicro && fatreader) ? RW_READER : lti; 479fa9e4066Sahrens rw_enter(&zap->zap_rwlock, lt); 480fa9e4066Sahrens if (lt != ((!zap->zap_ismicro && fatreader) ? RW_READER : lti)) { 481fa9e4066Sahrens /* it was upgraded, now we only need reader */ 482fa9e4066Sahrens ASSERT(lt == RW_WRITER); 483fa9e4066Sahrens ASSERT(RW_READER == 484fa9e4066Sahrens (!zap->zap_ismicro && fatreader) ? RW_READER : lti); 485fa9e4066Sahrens rw_downgrade(&zap->zap_rwlock); 486fa9e4066Sahrens lt = RW_READER; 487fa9e4066Sahrens } 488fa9e4066Sahrens 489fa9e4066Sahrens zap->zap_objset = os; 490fa9e4066Sahrens 491fa9e4066Sahrens if (lt == RW_WRITER) 492fa9e4066Sahrens dmu_buf_will_dirty(db, tx); 493fa9e4066Sahrens 494fa9e4066Sahrens ASSERT3P(zap->zap_dbuf, ==, db); 495fa9e4066Sahrens 496fa9e4066Sahrens ASSERT(!zap->zap_ismicro || 497fa9e4066Sahrens zap->zap_m.zap_num_entries <= zap->zap_m.zap_num_chunks); 498c5f9e431Sahrens if (zap->zap_ismicro && tx && adding && 499fa9e4066Sahrens zap->zap_m.zap_num_entries == zap->zap_m.zap_num_chunks) { 500fa9e4066Sahrens uint64_t newsz = db->db_size + SPA_MINBLOCKSIZE; 501fa9e4066Sahrens if (newsz > MZAP_MAX_BLKSZ) { 502fa9e4066Sahrens dprintf("upgrading obj %llu: num_entries=%u\n", 503fa9e4066Sahrens obj, zap->zap_m.zap_num_entries); 504fa9e4066Sahrens *zapp = zap; 505b24ab676SJeff Bonwick return (mzap_upgrade(zapp, tx, 0)); 506fa9e4066Sahrens } 507fa9e4066Sahrens err = dmu_object_set_blocksize(os, obj, newsz, 0, tx); 508fa9e4066Sahrens ASSERT3U(err, ==, 0); 509fa9e4066Sahrens zap->zap_m.zap_num_chunks = 510fa9e4066Sahrens db->db_size / MZAP_ENT_LEN - 1; 511fa9e4066Sahrens } 512fa9e4066Sahrens 513fa9e4066Sahrens *zapp = zap; 514fa9e4066Sahrens return (0); 515fa9e4066Sahrens } 516fa9e4066Sahrens 517fa9e4066Sahrens void 518fa9e4066Sahrens zap_unlockdir(zap_t *zap) 519fa9e4066Sahrens { 520fa9e4066Sahrens rw_exit(&zap->zap_rwlock); 521ea8dc4b6Seschrock dmu_buf_rele(zap->zap_dbuf, NULL); 522fa9e4066Sahrens } 523fa9e4066Sahrens 524ad860c82Sbonwick static int 525b24ab676SJeff Bonwick mzap_upgrade(zap_t **zapp, dmu_tx_t *tx, zap_flags_t flags) 526fa9e4066Sahrens { 527fa9e4066Sahrens mzap_phys_t *mzp; 528b24ab676SJeff Bonwick int i, sz, nchunks; 529b24ab676SJeff Bonwick int err = 0; 530ad860c82Sbonwick zap_t *zap = *zapp; 531fa9e4066Sahrens 532fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 533fa9e4066Sahrens 534fa9e4066Sahrens sz = zap->zap_dbuf->db_size; 535fa9e4066Sahrens mzp = kmem_alloc(sz, KM_SLEEP); 536fa9e4066Sahrens bcopy(zap->zap_dbuf->db_data, mzp, sz); 537fa9e4066Sahrens nchunks = zap->zap_m.zap_num_chunks; 538fa9e4066Sahrens 539b24ab676SJeff Bonwick if (!flags) { 540b24ab676SJeff Bonwick err = dmu_object_set_blocksize(zap->zap_objset, zap->zap_object, 541b24ab676SJeff Bonwick 1ULL << fzap_default_block_shift, 0, tx); 542b24ab676SJeff Bonwick if (err) { 543b24ab676SJeff Bonwick kmem_free(mzp, sz); 544b24ab676SJeff Bonwick return (err); 545b24ab676SJeff Bonwick } 546ad860c82Sbonwick } 547fa9e4066Sahrens 548fa9e4066Sahrens dprintf("upgrading obj=%llu with %u chunks\n", 549fa9e4066Sahrens zap->zap_object, nchunks); 550da6c28aaSamw /* XXX destroy the avl later, so we can use the stored hash value */ 551fa9e4066Sahrens mze_destroy(zap); 552fa9e4066Sahrens 553b24ab676SJeff Bonwick fzap_upgrade(zap, tx, flags); 554fa9e4066Sahrens 555fa9e4066Sahrens for (i = 0; i < nchunks; i++) { 556fa9e4066Sahrens mzap_ent_phys_t *mze = &mzp->mz_chunk[i]; 557da6c28aaSamw zap_name_t *zn; 558fa9e4066Sahrens if (mze->mze_name[0] == 0) 559fa9e4066Sahrens continue; 560fa9e4066Sahrens dprintf("adding %s=%llu\n", 561fa9e4066Sahrens mze->mze_name, mze->mze_value); 562da6c28aaSamw zn = zap_name_alloc(zap, mze->mze_name, MT_EXACT); 563ad860c82Sbonwick err = fzap_add_cd(zn, 8, 1, &mze->mze_value, mze->mze_cd, tx); 564ad860c82Sbonwick zap = zn->zn_zap; /* fzap_add_cd() may change zap */ 565da6c28aaSamw zap_name_free(zn); 566ad860c82Sbonwick if (err) 567ad860c82Sbonwick break; 568fa9e4066Sahrens } 569fa9e4066Sahrens kmem_free(mzp, sz); 570ad860c82Sbonwick *zapp = zap; 571ad860c82Sbonwick return (err); 572fa9e4066Sahrens } 573fa9e4066Sahrens 574fa9e4066Sahrens static void 575b24ab676SJeff Bonwick mzap_create_impl(objset_t *os, uint64_t obj, int normflags, zap_flags_t flags, 576b24ab676SJeff Bonwick dmu_tx_t *tx) 577fa9e4066Sahrens { 578fa9e4066Sahrens dmu_buf_t *db; 579fa9e4066Sahrens mzap_phys_t *zp; 580fa9e4066Sahrens 58147cb52daSJeff Bonwick VERIFY(0 == dmu_buf_hold(os, obj, 0, FTAG, &db, DMU_READ_NO_PREFETCH)); 582fa9e4066Sahrens 583fa9e4066Sahrens #ifdef ZFS_DEBUG 584fa9e4066Sahrens { 585fa9e4066Sahrens dmu_object_info_t doi; 586fa9e4066Sahrens dmu_object_info_from_db(db, &doi); 587fa9e4066Sahrens ASSERT(dmu_ot[doi.doi_type].ot_byteswap == zap_byteswap); 588fa9e4066Sahrens } 589fa9e4066Sahrens #endif 590fa9e4066Sahrens 591fa9e4066Sahrens dmu_buf_will_dirty(db, tx); 592fa9e4066Sahrens zp = db->db_data; 593fa9e4066Sahrens zp->mz_block_type = ZBT_MICRO; 594fa9e4066Sahrens zp->mz_salt = ((uintptr_t)db ^ (uintptr_t)tx ^ (obj << 1)) | 1ULL; 595da6c28aaSamw zp->mz_normflags = normflags; 596ea8dc4b6Seschrock dmu_buf_rele(db, FTAG); 597b24ab676SJeff Bonwick 598b24ab676SJeff Bonwick if (flags != 0) { 599b24ab676SJeff Bonwick zap_t *zap; 600b24ab676SJeff Bonwick /* Only fat zap supports flags; upgrade immediately. */ 601b24ab676SJeff Bonwick VERIFY(0 == zap_lockdir(os, obj, tx, RW_WRITER, 602b24ab676SJeff Bonwick B_FALSE, B_FALSE, &zap)); 603b24ab676SJeff Bonwick VERIFY3U(0, ==, mzap_upgrade(&zap, tx, flags)); 604b24ab676SJeff Bonwick zap_unlockdir(zap); 605b24ab676SJeff Bonwick } 606fa9e4066Sahrens } 607fa9e4066Sahrens 608fa9e4066Sahrens int 609fa9e4066Sahrens zap_create_claim(objset_t *os, uint64_t obj, dmu_object_type_t ot, 610fa9e4066Sahrens dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) 611da6c28aaSamw { 612da6c28aaSamw return (zap_create_claim_norm(os, obj, 613da6c28aaSamw 0, ot, bonustype, bonuslen, tx)); 614da6c28aaSamw } 615da6c28aaSamw 616da6c28aaSamw int 617da6c28aaSamw zap_create_claim_norm(objset_t *os, uint64_t obj, int normflags, 618da6c28aaSamw dmu_object_type_t ot, 619da6c28aaSamw dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) 620fa9e4066Sahrens { 621fa9e4066Sahrens int err; 622fa9e4066Sahrens 623fa9e4066Sahrens err = dmu_object_claim(os, obj, ot, 0, bonustype, bonuslen, tx); 624fa9e4066Sahrens if (err != 0) 625fa9e4066Sahrens return (err); 626b24ab676SJeff Bonwick mzap_create_impl(os, obj, normflags, 0, tx); 627fa9e4066Sahrens return (0); 628fa9e4066Sahrens } 629fa9e4066Sahrens 630fa9e4066Sahrens uint64_t 631fa9e4066Sahrens zap_create(objset_t *os, dmu_object_type_t ot, 632fa9e4066Sahrens dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) 633da6c28aaSamw { 634da6c28aaSamw return (zap_create_norm(os, 0, ot, bonustype, bonuslen, tx)); 635da6c28aaSamw } 636da6c28aaSamw 637da6c28aaSamw uint64_t 638da6c28aaSamw zap_create_norm(objset_t *os, int normflags, dmu_object_type_t ot, 639da6c28aaSamw dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) 640fa9e4066Sahrens { 641fa9e4066Sahrens uint64_t obj = dmu_object_alloc(os, ot, 0, bonustype, bonuslen, tx); 642fa9e4066Sahrens 643b24ab676SJeff Bonwick mzap_create_impl(os, obj, normflags, 0, tx); 644b24ab676SJeff Bonwick return (obj); 645b24ab676SJeff Bonwick } 646b24ab676SJeff Bonwick 647b24ab676SJeff Bonwick uint64_t 648b24ab676SJeff Bonwick zap_create_flags(objset_t *os, int normflags, zap_flags_t flags, 649b24ab676SJeff Bonwick dmu_object_type_t ot, int leaf_blockshift, int indirect_blockshift, 650b24ab676SJeff Bonwick dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) 651b24ab676SJeff Bonwick { 652b24ab676SJeff Bonwick uint64_t obj = dmu_object_alloc(os, ot, 0, bonustype, bonuslen, tx); 653b24ab676SJeff Bonwick 654b24ab676SJeff Bonwick ASSERT(leaf_blockshift >= SPA_MINBLOCKSHIFT && 655b24ab676SJeff Bonwick leaf_blockshift <= SPA_MAXBLOCKSHIFT && 656b24ab676SJeff Bonwick indirect_blockshift >= SPA_MINBLOCKSHIFT && 657b24ab676SJeff Bonwick indirect_blockshift <= SPA_MAXBLOCKSHIFT); 658b24ab676SJeff Bonwick 659b24ab676SJeff Bonwick VERIFY(dmu_object_set_blocksize(os, obj, 660b24ab676SJeff Bonwick 1ULL << leaf_blockshift, indirect_blockshift, tx) == 0); 661b24ab676SJeff Bonwick 662b24ab676SJeff Bonwick mzap_create_impl(os, obj, normflags, flags, tx); 663fa9e4066Sahrens return (obj); 664fa9e4066Sahrens } 665fa9e4066Sahrens 666fa9e4066Sahrens int 667fa9e4066Sahrens zap_destroy(objset_t *os, uint64_t zapobj, dmu_tx_t *tx) 668fa9e4066Sahrens { 669fa9e4066Sahrens /* 670fa9e4066Sahrens * dmu_object_free will free the object number and free the 671fa9e4066Sahrens * data. Freeing the data will cause our pageout function to be 672fa9e4066Sahrens * called, which will destroy our data (zap_leaf_t's and zap_t). 673fa9e4066Sahrens */ 674fa9e4066Sahrens 675fa9e4066Sahrens return (dmu_object_free(os, zapobj, tx)); 676fa9e4066Sahrens } 677fa9e4066Sahrens 678fa9e4066Sahrens _NOTE(ARGSUSED(0)) 679fa9e4066Sahrens void 680455d5089Sahrens zap_evict(dmu_buf_t *db, void *vzap) 681fa9e4066Sahrens { 682455d5089Sahrens zap_t *zap = vzap; 683fa9e4066Sahrens 684fa9e4066Sahrens rw_destroy(&zap->zap_rwlock); 685fa9e4066Sahrens 686f65e61c0Sahrens if (zap->zap_ismicro) 687fa9e4066Sahrens mze_destroy(zap); 688c25056deSgw else 689c25056deSgw mutex_destroy(&zap->zap_f.zap_num_entries_mtx); 690fa9e4066Sahrens 691fa9e4066Sahrens kmem_free(zap, sizeof (zap_t)); 692fa9e4066Sahrens } 693fa9e4066Sahrens 694fa9e4066Sahrens int 695fa9e4066Sahrens zap_count(objset_t *os, uint64_t zapobj, uint64_t *count) 696fa9e4066Sahrens { 697fa9e4066Sahrens zap_t *zap; 698fa9e4066Sahrens int err; 699fa9e4066Sahrens 700c5f9e431Sahrens err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); 701fa9e4066Sahrens if (err) 702fa9e4066Sahrens return (err); 703fa9e4066Sahrens if (!zap->zap_ismicro) { 704fa9e4066Sahrens err = fzap_count(zap, count); 705fa9e4066Sahrens } else { 706fa9e4066Sahrens *count = zap->zap_m.zap_num_entries; 707fa9e4066Sahrens } 708fa9e4066Sahrens zap_unlockdir(zap); 709fa9e4066Sahrens return (err); 710fa9e4066Sahrens } 711fa9e4066Sahrens 712fa9e4066Sahrens /* 713da6c28aaSamw * zn may be NULL; if not specified, it will be computed if needed. 714da6c28aaSamw * See also the comment above zap_entry_normalization_conflict(). 715da6c28aaSamw */ 716da6c28aaSamw static boolean_t 717da6c28aaSamw mzap_normalization_conflict(zap_t *zap, zap_name_t *zn, mzap_ent_t *mze) 718da6c28aaSamw { 719da6c28aaSamw mzap_ent_t *other; 720da6c28aaSamw int direction = AVL_BEFORE; 721da6c28aaSamw boolean_t allocdzn = B_FALSE; 722da6c28aaSamw 723da6c28aaSamw if (zap->zap_normflags == 0) 724da6c28aaSamw return (B_FALSE); 725da6c28aaSamw 726da6c28aaSamw again: 727da6c28aaSamw for (other = avl_walk(&zap->zap_m.zap_avl, mze, direction); 728da6c28aaSamw other && other->mze_hash == mze->mze_hash; 729da6c28aaSamw other = avl_walk(&zap->zap_m.zap_avl, other, direction)) { 730da6c28aaSamw 731da6c28aaSamw if (zn == NULL) { 732*3f9d6ad7SLin Ling zn = zap_name_alloc(zap, MZE_PHYS(zap, mze)->mze_name, 733da6c28aaSamw MT_FIRST); 734da6c28aaSamw allocdzn = B_TRUE; 735da6c28aaSamw } 736*3f9d6ad7SLin Ling if (zap_match(zn, MZE_PHYS(zap, other)->mze_name)) { 737da6c28aaSamw if (allocdzn) 738da6c28aaSamw zap_name_free(zn); 739da6c28aaSamw return (B_TRUE); 740da6c28aaSamw } 741da6c28aaSamw } 742da6c28aaSamw 743da6c28aaSamw if (direction == AVL_BEFORE) { 744da6c28aaSamw direction = AVL_AFTER; 745da6c28aaSamw goto again; 746da6c28aaSamw } 747da6c28aaSamw 748da6c28aaSamw if (allocdzn) 749da6c28aaSamw zap_name_free(zn); 750da6c28aaSamw return (B_FALSE); 751da6c28aaSamw } 752da6c28aaSamw 753da6c28aaSamw /* 754da6c28aaSamw * Routines for manipulating attributes. 755fa9e4066Sahrens */ 756fa9e4066Sahrens 757fa9e4066Sahrens int 758fa9e4066Sahrens zap_lookup(objset_t *os, uint64_t zapobj, const char *name, 759fa9e4066Sahrens uint64_t integer_size, uint64_t num_integers, void *buf) 760da6c28aaSamw { 761da6c28aaSamw return (zap_lookup_norm(os, zapobj, name, integer_size, 762da6c28aaSamw num_integers, buf, MT_EXACT, NULL, 0, NULL)); 763da6c28aaSamw } 764da6c28aaSamw 765da6c28aaSamw int 766da6c28aaSamw zap_lookup_norm(objset_t *os, uint64_t zapobj, const char *name, 767da6c28aaSamw uint64_t integer_size, uint64_t num_integers, void *buf, 768da6c28aaSamw matchtype_t mt, char *realname, int rn_len, 769da6c28aaSamw boolean_t *ncp) 770fa9e4066Sahrens { 771fa9e4066Sahrens zap_t *zap; 772fa9e4066Sahrens int err; 773fa9e4066Sahrens mzap_ent_t *mze; 774da6c28aaSamw zap_name_t *zn; 775fa9e4066Sahrens 776c5f9e431Sahrens err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); 777fa9e4066Sahrens if (err) 778fa9e4066Sahrens return (err); 779da6c28aaSamw zn = zap_name_alloc(zap, name, mt); 780da6c28aaSamw if (zn == NULL) { 781da6c28aaSamw zap_unlockdir(zap); 782da6c28aaSamw return (ENOTSUP); 783da6c28aaSamw } 784da6c28aaSamw 785fa9e4066Sahrens if (!zap->zap_ismicro) { 786da6c28aaSamw err = fzap_lookup(zn, integer_size, num_integers, buf, 787da6c28aaSamw realname, rn_len, ncp); 788fa9e4066Sahrens } else { 789da6c28aaSamw mze = mze_find(zn); 790fa9e4066Sahrens if (mze == NULL) { 791fa9e4066Sahrens err = ENOENT; 792fa9e4066Sahrens } else { 793da6c28aaSamw if (num_integers < 1) { 794fa9e4066Sahrens err = EOVERFLOW; 795da6c28aaSamw } else if (integer_size != 8) { 796fa9e4066Sahrens err = EINVAL; 797da6c28aaSamw } else { 798*3f9d6ad7SLin Ling *(uint64_t *)buf = 799*3f9d6ad7SLin Ling MZE_PHYS(zap, mze)->mze_value; 800da6c28aaSamw (void) strlcpy(realname, 801*3f9d6ad7SLin Ling MZE_PHYS(zap, mze)->mze_name, rn_len); 802da6c28aaSamw if (ncp) { 803da6c28aaSamw *ncp = mzap_normalization_conflict(zap, 804da6c28aaSamw zn, mze); 805da6c28aaSamw } 806da6c28aaSamw } 807fa9e4066Sahrens } 808fa9e4066Sahrens } 809da6c28aaSamw zap_name_free(zn); 810fa9e4066Sahrens zap_unlockdir(zap); 811fa9e4066Sahrens return (err); 812fa9e4066Sahrens } 813fa9e4066Sahrens 814b24ab676SJeff Bonwick int 815b24ab676SJeff Bonwick zap_lookup_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, 816b24ab676SJeff Bonwick int key_numints, uint64_t integer_size, uint64_t num_integers, void *buf) 817b24ab676SJeff Bonwick { 818b24ab676SJeff Bonwick zap_t *zap; 819b24ab676SJeff Bonwick int err; 820b24ab676SJeff Bonwick zap_name_t *zn; 821b24ab676SJeff Bonwick 822b24ab676SJeff Bonwick err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); 823b24ab676SJeff Bonwick if (err) 824b24ab676SJeff Bonwick return (err); 825b24ab676SJeff Bonwick zn = zap_name_alloc_uint64(zap, key, key_numints); 826b24ab676SJeff Bonwick if (zn == NULL) { 827b24ab676SJeff Bonwick zap_unlockdir(zap); 828b24ab676SJeff Bonwick return (ENOTSUP); 829b24ab676SJeff Bonwick } 830b24ab676SJeff Bonwick 831b24ab676SJeff Bonwick err = fzap_lookup(zn, integer_size, num_integers, buf, 832b24ab676SJeff Bonwick NULL, 0, NULL); 833b24ab676SJeff Bonwick zap_name_free(zn); 834b24ab676SJeff Bonwick zap_unlockdir(zap); 835b24ab676SJeff Bonwick return (err); 836b24ab676SJeff Bonwick } 837b24ab676SJeff Bonwick 83892241e0bSTom Erickson int 83992241e0bSTom Erickson zap_contains(objset_t *os, uint64_t zapobj, const char *name) 84092241e0bSTom Erickson { 84192241e0bSTom Erickson int err = (zap_lookup_norm(os, zapobj, name, 0, 84292241e0bSTom Erickson 0, NULL, MT_EXACT, NULL, 0, NULL)); 84392241e0bSTom Erickson if (err == EOVERFLOW || err == EINVAL) 84492241e0bSTom Erickson err = 0; /* found, but skipped reading the value */ 84592241e0bSTom Erickson return (err); 84692241e0bSTom Erickson } 84792241e0bSTom Erickson 848fa9e4066Sahrens int 849fa9e4066Sahrens zap_length(objset_t *os, uint64_t zapobj, const char *name, 850fa9e4066Sahrens uint64_t *integer_size, uint64_t *num_integers) 851fa9e4066Sahrens { 852fa9e4066Sahrens zap_t *zap; 853fa9e4066Sahrens int err; 854fa9e4066Sahrens mzap_ent_t *mze; 855da6c28aaSamw zap_name_t *zn; 856fa9e4066Sahrens 857c5f9e431Sahrens err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); 858fa9e4066Sahrens if (err) 859fa9e4066Sahrens return (err); 860da6c28aaSamw zn = zap_name_alloc(zap, name, MT_EXACT); 861da6c28aaSamw if (zn == NULL) { 862da6c28aaSamw zap_unlockdir(zap); 863da6c28aaSamw return (ENOTSUP); 864da6c28aaSamw } 865fa9e4066Sahrens if (!zap->zap_ismicro) { 866da6c28aaSamw err = fzap_length(zn, integer_size, num_integers); 867fa9e4066Sahrens } else { 868da6c28aaSamw mze = mze_find(zn); 869fa9e4066Sahrens if (mze == NULL) { 870fa9e4066Sahrens err = ENOENT; 871fa9e4066Sahrens } else { 872fa9e4066Sahrens if (integer_size) 873fa9e4066Sahrens *integer_size = 8; 874fa9e4066Sahrens if (num_integers) 875fa9e4066Sahrens *num_integers = 1; 876fa9e4066Sahrens } 877fa9e4066Sahrens } 878da6c28aaSamw zap_name_free(zn); 879fa9e4066Sahrens zap_unlockdir(zap); 880fa9e4066Sahrens return (err); 881fa9e4066Sahrens } 882fa9e4066Sahrens 883b24ab676SJeff Bonwick int 884b24ab676SJeff Bonwick zap_length_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, 885b24ab676SJeff Bonwick int key_numints, uint64_t *integer_size, uint64_t *num_integers) 886b24ab676SJeff Bonwick { 887b24ab676SJeff Bonwick zap_t *zap; 888b24ab676SJeff Bonwick int err; 889b24ab676SJeff Bonwick zap_name_t *zn; 890b24ab676SJeff Bonwick 891b24ab676SJeff Bonwick err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); 892b24ab676SJeff Bonwick if (err) 893b24ab676SJeff Bonwick return (err); 894b24ab676SJeff Bonwick zn = zap_name_alloc_uint64(zap, key, key_numints); 895b24ab676SJeff Bonwick if (zn == NULL) { 896b24ab676SJeff Bonwick zap_unlockdir(zap); 897b24ab676SJeff Bonwick return (ENOTSUP); 898b24ab676SJeff Bonwick } 899b24ab676SJeff Bonwick err = fzap_length(zn, integer_size, num_integers); 900b24ab676SJeff Bonwick zap_name_free(zn); 901b24ab676SJeff Bonwick zap_unlockdir(zap); 902b24ab676SJeff Bonwick return (err); 903b24ab676SJeff Bonwick } 904b24ab676SJeff Bonwick 905fa9e4066Sahrens static void 906da6c28aaSamw mzap_addent(zap_name_t *zn, uint64_t value) 907fa9e4066Sahrens { 908fa9e4066Sahrens int i; 909da6c28aaSamw zap_t *zap = zn->zn_zap; 910fa9e4066Sahrens int start = zap->zap_m.zap_alloc_next; 911fa9e4066Sahrens uint32_t cd; 912fa9e4066Sahrens 913fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 914fa9e4066Sahrens 915fa9e4066Sahrens #ifdef ZFS_DEBUG 916fa9e4066Sahrens for (i = 0; i < zap->zap_m.zap_num_chunks; i++) { 917fa9e4066Sahrens mzap_ent_phys_t *mze = &zap->zap_m.zap_phys->mz_chunk[i]; 918b24ab676SJeff Bonwick ASSERT(strcmp(zn->zn_key_orig, mze->mze_name) != 0); 919fa9e4066Sahrens } 920fa9e4066Sahrens #endif 921fa9e4066Sahrens 922da6c28aaSamw cd = mze_find_unused_cd(zap, zn->zn_hash); 923fa9e4066Sahrens /* given the limited size of the microzap, this can't happen */ 924b24ab676SJeff Bonwick ASSERT(cd < zap_maxcd(zap)); 925fa9e4066Sahrens 926fa9e4066Sahrens again: 927fa9e4066Sahrens for (i = start; i < zap->zap_m.zap_num_chunks; i++) { 928fa9e4066Sahrens mzap_ent_phys_t *mze = &zap->zap_m.zap_phys->mz_chunk[i]; 929fa9e4066Sahrens if (mze->mze_name[0] == 0) { 930fa9e4066Sahrens mze->mze_value = value; 931fa9e4066Sahrens mze->mze_cd = cd; 932b24ab676SJeff Bonwick (void) strcpy(mze->mze_name, zn->zn_key_orig); 933fa9e4066Sahrens zap->zap_m.zap_num_entries++; 934fa9e4066Sahrens zap->zap_m.zap_alloc_next = i+1; 935fa9e4066Sahrens if (zap->zap_m.zap_alloc_next == 936fa9e4066Sahrens zap->zap_m.zap_num_chunks) 937fa9e4066Sahrens zap->zap_m.zap_alloc_next = 0; 938*3f9d6ad7SLin Ling mze_insert(zap, i, zn->zn_hash); 939fa9e4066Sahrens return; 940fa9e4066Sahrens } 941fa9e4066Sahrens } 942fa9e4066Sahrens if (start != 0) { 943fa9e4066Sahrens start = 0; 944fa9e4066Sahrens goto again; 945fa9e4066Sahrens } 946fa9e4066Sahrens ASSERT(!"out of entries!"); 947fa9e4066Sahrens } 948fa9e4066Sahrens 949fa9e4066Sahrens int 950b24ab676SJeff Bonwick zap_add(objset_t *os, uint64_t zapobj, const char *key, 951fa9e4066Sahrens int integer_size, uint64_t num_integers, 952fa9e4066Sahrens const void *val, dmu_tx_t *tx) 953fa9e4066Sahrens { 954fa9e4066Sahrens zap_t *zap; 955fa9e4066Sahrens int err; 956fa9e4066Sahrens mzap_ent_t *mze; 957fa9e4066Sahrens const uint64_t *intval = val; 958da6c28aaSamw zap_name_t *zn; 959fa9e4066Sahrens 960c5f9e431Sahrens err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, &zap); 961fa9e4066Sahrens if (err) 962fa9e4066Sahrens return (err); 963b24ab676SJeff Bonwick zn = zap_name_alloc(zap, key, MT_EXACT); 964da6c28aaSamw if (zn == NULL) { 965da6c28aaSamw zap_unlockdir(zap); 966da6c28aaSamw return (ENOTSUP); 967da6c28aaSamw } 968fa9e4066Sahrens if (!zap->zap_ismicro) { 969da6c28aaSamw err = fzap_add(zn, integer_size, num_integers, val, tx); 970ad860c82Sbonwick zap = zn->zn_zap; /* fzap_add() may change zap */ 971fa9e4066Sahrens } else if (integer_size != 8 || num_integers != 1 || 972b24ab676SJeff Bonwick strlen(key) >= MZAP_NAME_LEN) { 973b24ab676SJeff Bonwick err = mzap_upgrade(&zn->zn_zap, tx, 0); 974ad860c82Sbonwick if (err == 0) 975ad860c82Sbonwick err = fzap_add(zn, integer_size, num_integers, val, tx); 976ad860c82Sbonwick zap = zn->zn_zap; /* fzap_add() may change zap */ 977fa9e4066Sahrens } else { 978da6c28aaSamw mze = mze_find(zn); 979fa9e4066Sahrens if (mze != NULL) { 980fa9e4066Sahrens err = EEXIST; 981fa9e4066Sahrens } else { 982da6c28aaSamw mzap_addent(zn, *intval); 983fa9e4066Sahrens } 984fa9e4066Sahrens } 985ad860c82Sbonwick ASSERT(zap == zn->zn_zap); 986da6c28aaSamw zap_name_free(zn); 987ad860c82Sbonwick if (zap != NULL) /* may be NULL if fzap_add() failed */ 988ad860c82Sbonwick zap_unlockdir(zap); 989fa9e4066Sahrens return (err); 990fa9e4066Sahrens } 991fa9e4066Sahrens 992b24ab676SJeff Bonwick int 993b24ab676SJeff Bonwick zap_add_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, 994b24ab676SJeff Bonwick int key_numints, int integer_size, uint64_t num_integers, 995b24ab676SJeff Bonwick const void *val, dmu_tx_t *tx) 996b24ab676SJeff Bonwick { 997b24ab676SJeff Bonwick zap_t *zap; 998b24ab676SJeff Bonwick int err; 999b24ab676SJeff Bonwick zap_name_t *zn; 1000b24ab676SJeff Bonwick 1001b24ab676SJeff Bonwick err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, &zap); 1002b24ab676SJeff Bonwick if (err) 1003b24ab676SJeff Bonwick return (err); 1004b24ab676SJeff Bonwick zn = zap_name_alloc_uint64(zap, key, key_numints); 1005b24ab676SJeff Bonwick if (zn == NULL) { 1006b24ab676SJeff Bonwick zap_unlockdir(zap); 1007b24ab676SJeff Bonwick return (ENOTSUP); 1008b24ab676SJeff Bonwick } 1009b24ab676SJeff Bonwick err = fzap_add(zn, integer_size, num_integers, val, tx); 1010b24ab676SJeff Bonwick zap = zn->zn_zap; /* fzap_add() may change zap */ 1011b24ab676SJeff Bonwick zap_name_free(zn); 1012b24ab676SJeff Bonwick if (zap != NULL) /* may be NULL if fzap_add() failed */ 1013b24ab676SJeff Bonwick zap_unlockdir(zap); 1014b24ab676SJeff Bonwick return (err); 1015b24ab676SJeff Bonwick } 1016b24ab676SJeff Bonwick 1017fa9e4066Sahrens int 1018fa9e4066Sahrens zap_update(objset_t *os, uint64_t zapobj, const char *name, 1019fa9e4066Sahrens int integer_size, uint64_t num_integers, const void *val, dmu_tx_t *tx) 1020fa9e4066Sahrens { 1021fa9e4066Sahrens zap_t *zap; 1022fa9e4066Sahrens mzap_ent_t *mze; 1023*3f9d6ad7SLin Ling uint64_t oldval; 1024fa9e4066Sahrens const uint64_t *intval = val; 1025da6c28aaSamw zap_name_t *zn; 1026fa9e4066Sahrens int err; 1027fa9e4066Sahrens 1028*3f9d6ad7SLin Ling #ifdef ZFS_DEBUG 1029*3f9d6ad7SLin Ling /* 1030*3f9d6ad7SLin Ling * If there is an old value, it shouldn't change across the 1031*3f9d6ad7SLin Ling * lockdir (eg, due to bprewrite's xlation). 1032*3f9d6ad7SLin Ling */ 1033*3f9d6ad7SLin Ling if (integer_size == 8 && num_integers == 1) 1034*3f9d6ad7SLin Ling (void) zap_lookup(os, zapobj, name, 8, 1, &oldval); 1035*3f9d6ad7SLin Ling #endif 1036*3f9d6ad7SLin Ling 1037c5f9e431Sahrens err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, &zap); 1038fa9e4066Sahrens if (err) 1039fa9e4066Sahrens return (err); 1040da6c28aaSamw zn = zap_name_alloc(zap, name, MT_EXACT); 1041da6c28aaSamw if (zn == NULL) { 1042da6c28aaSamw zap_unlockdir(zap); 1043da6c28aaSamw return (ENOTSUP); 1044da6c28aaSamw } 1045fa9e4066Sahrens if (!zap->zap_ismicro) { 1046da6c28aaSamw err = fzap_update(zn, integer_size, num_integers, val, tx); 1047ad860c82Sbonwick zap = zn->zn_zap; /* fzap_update() may change zap */ 1048fa9e4066Sahrens } else if (integer_size != 8 || num_integers != 1 || 1049fa9e4066Sahrens strlen(name) >= MZAP_NAME_LEN) { 1050fa9e4066Sahrens dprintf("upgrading obj %llu: intsz=%u numint=%llu name=%s\n", 1051fa9e4066Sahrens zapobj, integer_size, num_integers, name); 1052b24ab676SJeff Bonwick err = mzap_upgrade(&zn->zn_zap, tx, 0); 1053ad860c82Sbonwick if (err == 0) 1054ad860c82Sbonwick err = fzap_update(zn, integer_size, num_integers, 1055ad860c82Sbonwick val, tx); 1056ad860c82Sbonwick zap = zn->zn_zap; /* fzap_update() may change zap */ 1057fa9e4066Sahrens } else { 1058da6c28aaSamw mze = mze_find(zn); 1059fa9e4066Sahrens if (mze != NULL) { 1060*3f9d6ad7SLin Ling ASSERT3U(MZE_PHYS(zap, mze)->mze_value, ==, oldval); 1061*3f9d6ad7SLin Ling MZE_PHYS(zap, mze)->mze_value = *intval; 1062fa9e4066Sahrens } else { 1063da6c28aaSamw mzap_addent(zn, *intval); 1064fa9e4066Sahrens } 1065fa9e4066Sahrens } 1066ad860c82Sbonwick ASSERT(zap == zn->zn_zap); 1067da6c28aaSamw zap_name_free(zn); 1068ad860c82Sbonwick if (zap != NULL) /* may be NULL if fzap_upgrade() failed */ 1069ad860c82Sbonwick zap_unlockdir(zap); 1070455d5089Sahrens return (err); 1071fa9e4066Sahrens } 1072fa9e4066Sahrens 1073b24ab676SJeff Bonwick int 1074b24ab676SJeff Bonwick zap_update_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, 1075b24ab676SJeff Bonwick int key_numints, 1076b24ab676SJeff Bonwick int integer_size, uint64_t num_integers, const void *val, dmu_tx_t *tx) 1077b24ab676SJeff Bonwick { 1078b24ab676SJeff Bonwick zap_t *zap; 1079b24ab676SJeff Bonwick zap_name_t *zn; 1080b24ab676SJeff Bonwick int err; 1081b24ab676SJeff Bonwick 1082b24ab676SJeff Bonwick err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, &zap); 1083b24ab676SJeff Bonwick if (err) 1084b24ab676SJeff Bonwick return (err); 1085b24ab676SJeff Bonwick zn = zap_name_alloc_uint64(zap, key, key_numints); 1086b24ab676SJeff Bonwick if (zn == NULL) { 1087b24ab676SJeff Bonwick zap_unlockdir(zap); 1088b24ab676SJeff Bonwick return (ENOTSUP); 1089b24ab676SJeff Bonwick } 1090b24ab676SJeff Bonwick err = fzap_update(zn, integer_size, num_integers, val, tx); 1091b24ab676SJeff Bonwick zap = zn->zn_zap; /* fzap_update() may change zap */ 1092b24ab676SJeff Bonwick zap_name_free(zn); 1093b24ab676SJeff Bonwick if (zap != NULL) /* may be NULL if fzap_upgrade() failed */ 1094b24ab676SJeff Bonwick zap_unlockdir(zap); 1095b24ab676SJeff Bonwick return (err); 1096b24ab676SJeff Bonwick } 1097b24ab676SJeff Bonwick 1098fa9e4066Sahrens int 1099fa9e4066Sahrens zap_remove(objset_t *os, uint64_t zapobj, const char *name, dmu_tx_t *tx) 1100da6c28aaSamw { 1101da6c28aaSamw return (zap_remove_norm(os, zapobj, name, MT_EXACT, tx)); 1102da6c28aaSamw } 1103da6c28aaSamw 1104da6c28aaSamw int 1105da6c28aaSamw zap_remove_norm(objset_t *os, uint64_t zapobj, const char *name, 1106da6c28aaSamw matchtype_t mt, dmu_tx_t *tx) 1107fa9e4066Sahrens { 1108fa9e4066Sahrens zap_t *zap; 1109fa9e4066Sahrens int err; 1110fa9e4066Sahrens mzap_ent_t *mze; 1111da6c28aaSamw zap_name_t *zn; 1112fa9e4066Sahrens 1113c5f9e431Sahrens err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, FALSE, &zap); 1114fa9e4066Sahrens if (err) 1115fa9e4066Sahrens return (err); 1116da6c28aaSamw zn = zap_name_alloc(zap, name, mt); 1117da6c28aaSamw if (zn == NULL) { 1118da6c28aaSamw zap_unlockdir(zap); 1119da6c28aaSamw return (ENOTSUP); 1120da6c28aaSamw } 1121fa9e4066Sahrens if (!zap->zap_ismicro) { 1122da6c28aaSamw err = fzap_remove(zn, tx); 1123fa9e4066Sahrens } else { 1124da6c28aaSamw mze = mze_find(zn); 1125fa9e4066Sahrens if (mze == NULL) { 1126fa9e4066Sahrens err = ENOENT; 1127fa9e4066Sahrens } else { 1128fa9e4066Sahrens zap->zap_m.zap_num_entries--; 1129fa9e4066Sahrens bzero(&zap->zap_m.zap_phys->mz_chunk[mze->mze_chunkid], 1130fa9e4066Sahrens sizeof (mzap_ent_phys_t)); 1131fa9e4066Sahrens mze_remove(zap, mze); 1132fa9e4066Sahrens } 1133fa9e4066Sahrens } 1134da6c28aaSamw zap_name_free(zn); 1135fa9e4066Sahrens zap_unlockdir(zap); 1136fa9e4066Sahrens return (err); 1137fa9e4066Sahrens } 1138fa9e4066Sahrens 1139b24ab676SJeff Bonwick int 1140b24ab676SJeff Bonwick zap_remove_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, 1141b24ab676SJeff Bonwick int key_numints, dmu_tx_t *tx) 1142b24ab676SJeff Bonwick { 1143b24ab676SJeff Bonwick zap_t *zap; 1144b24ab676SJeff Bonwick int err; 1145b24ab676SJeff Bonwick zap_name_t *zn; 1146b24ab676SJeff Bonwick 1147b24ab676SJeff Bonwick err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, FALSE, &zap); 1148b24ab676SJeff Bonwick if (err) 1149b24ab676SJeff Bonwick return (err); 1150b24ab676SJeff Bonwick zn = zap_name_alloc_uint64(zap, key, key_numints); 1151b24ab676SJeff Bonwick if (zn == NULL) { 1152b24ab676SJeff Bonwick zap_unlockdir(zap); 1153b24ab676SJeff Bonwick return (ENOTSUP); 1154b24ab676SJeff Bonwick } 1155b24ab676SJeff Bonwick err = fzap_remove(zn, tx); 1156b24ab676SJeff Bonwick zap_name_free(zn); 1157b24ab676SJeff Bonwick zap_unlockdir(zap); 1158b24ab676SJeff Bonwick return (err); 1159b24ab676SJeff Bonwick } 1160b24ab676SJeff Bonwick 1161fa9e4066Sahrens /* 1162fa9e4066Sahrens * Routines for iterating over the attributes. 1163fa9e4066Sahrens */ 1164fa9e4066Sahrens 1165fa9e4066Sahrens void 1166fa9e4066Sahrens zap_cursor_init_serialized(zap_cursor_t *zc, objset_t *os, uint64_t zapobj, 1167fa9e4066Sahrens uint64_t serialized) 1168fa9e4066Sahrens { 1169fa9e4066Sahrens zc->zc_objset = os; 117087e5029aSahrens zc->zc_zap = NULL; 117187e5029aSahrens zc->zc_leaf = NULL; 1172fa9e4066Sahrens zc->zc_zapobj = zapobj; 1173b24ab676SJeff Bonwick zc->zc_serialized = serialized; 1174b24ab676SJeff Bonwick zc->zc_hash = 0; 1175b24ab676SJeff Bonwick zc->zc_cd = 0; 1176fa9e4066Sahrens } 1177fa9e4066Sahrens 117887e5029aSahrens void 117987e5029aSahrens zap_cursor_init(zap_cursor_t *zc, objset_t *os, uint64_t zapobj) 118087e5029aSahrens { 118187e5029aSahrens zap_cursor_init_serialized(zc, os, zapobj, 0); 118287e5029aSahrens } 118387e5029aSahrens 118487e5029aSahrens void 118587e5029aSahrens zap_cursor_fini(zap_cursor_t *zc) 118687e5029aSahrens { 118787e5029aSahrens if (zc->zc_zap) { 118887e5029aSahrens rw_enter(&zc->zc_zap->zap_rwlock, RW_READER); 118987e5029aSahrens zap_unlockdir(zc->zc_zap); 119087e5029aSahrens zc->zc_zap = NULL; 119187e5029aSahrens } 119287e5029aSahrens if (zc->zc_leaf) { 119387e5029aSahrens rw_enter(&zc->zc_leaf->l_rwlock, RW_READER); 119487e5029aSahrens zap_put_leaf(zc->zc_leaf); 119587e5029aSahrens zc->zc_leaf = NULL; 119687e5029aSahrens } 119787e5029aSahrens zc->zc_objset = NULL; 119887e5029aSahrens } 119987e5029aSahrens 1200fa9e4066Sahrens uint64_t 1201fa9e4066Sahrens zap_cursor_serialize(zap_cursor_t *zc) 1202fa9e4066Sahrens { 1203fa9e4066Sahrens if (zc->zc_hash == -1ULL) 1204fa9e4066Sahrens return (-1ULL); 1205b24ab676SJeff Bonwick if (zc->zc_zap == NULL) 1206b24ab676SJeff Bonwick return (zc->zc_serialized); 1207b24ab676SJeff Bonwick ASSERT((zc->zc_hash & zap_maxcd(zc->zc_zap)) == 0); 1208b24ab676SJeff Bonwick ASSERT(zc->zc_cd < zap_maxcd(zc->zc_zap)); 1209b24ab676SJeff Bonwick 1210b24ab676SJeff Bonwick /* 1211b24ab676SJeff Bonwick * We want to keep the high 32 bits of the cursor zero if we can, so 1212b24ab676SJeff Bonwick * that 32-bit programs can access this. So usually use a small 1213b24ab676SJeff Bonwick * (28-bit) hash value so we can fit 4 bits of cd into the low 32-bits 1214b24ab676SJeff Bonwick * of the cursor. 1215b24ab676SJeff Bonwick * 1216b24ab676SJeff Bonwick * [ collision differentiator | zap_hashbits()-bit hash value ] 1217b24ab676SJeff Bonwick */ 1218b24ab676SJeff Bonwick return ((zc->zc_hash >> (64 - zap_hashbits(zc->zc_zap))) | 1219b24ab676SJeff Bonwick ((uint64_t)zc->zc_cd << zap_hashbits(zc->zc_zap))); 1220fa9e4066Sahrens } 1221fa9e4066Sahrens 1222fa9e4066Sahrens int 1223fa9e4066Sahrens zap_cursor_retrieve(zap_cursor_t *zc, zap_attribute_t *za) 1224fa9e4066Sahrens { 1225fa9e4066Sahrens int err; 1226fa9e4066Sahrens avl_index_t idx; 1227fa9e4066Sahrens mzap_ent_t mze_tofind; 1228fa9e4066Sahrens mzap_ent_t *mze; 1229fa9e4066Sahrens 1230fa9e4066Sahrens if (zc->zc_hash == -1ULL) 1231fa9e4066Sahrens return (ENOENT); 1232fa9e4066Sahrens 123387e5029aSahrens if (zc->zc_zap == NULL) { 1234b24ab676SJeff Bonwick int hb; 123587e5029aSahrens err = zap_lockdir(zc->zc_objset, zc->zc_zapobj, NULL, 1236c5f9e431Sahrens RW_READER, TRUE, FALSE, &zc->zc_zap); 123787e5029aSahrens if (err) 123887e5029aSahrens return (err); 1239b24ab676SJeff Bonwick 1240b24ab676SJeff Bonwick /* 1241b24ab676SJeff Bonwick * To support zap_cursor_init_serialized, advance, retrieve, 1242b24ab676SJeff Bonwick * we must add to the existing zc_cd, which may already 1243b24ab676SJeff Bonwick * be 1 due to the zap_cursor_advance. 1244b24ab676SJeff Bonwick */ 1245b24ab676SJeff Bonwick ASSERT(zc->zc_hash == 0); 1246b24ab676SJeff Bonwick hb = zap_hashbits(zc->zc_zap); 1247b24ab676SJeff Bonwick zc->zc_hash = zc->zc_serialized << (64 - hb); 1248b24ab676SJeff Bonwick zc->zc_cd += zc->zc_serialized >> hb; 1249b24ab676SJeff Bonwick if (zc->zc_cd >= zap_maxcd(zc->zc_zap)) /* corrupt serialized */ 1250b24ab676SJeff Bonwick zc->zc_cd = 0; 125187e5029aSahrens } else { 125287e5029aSahrens rw_enter(&zc->zc_zap->zap_rwlock, RW_READER); 125387e5029aSahrens } 125487e5029aSahrens if (!zc->zc_zap->zap_ismicro) { 125587e5029aSahrens err = fzap_cursor_retrieve(zc->zc_zap, zc, za); 1256fa9e4066Sahrens } else { 1257fa9e4066Sahrens err = ENOENT; 1258fa9e4066Sahrens 1259fa9e4066Sahrens mze_tofind.mze_hash = zc->zc_hash; 1260*3f9d6ad7SLin Ling mze_tofind.mze_cd = zc->zc_cd; 1261fa9e4066Sahrens 126287e5029aSahrens mze = avl_find(&zc->zc_zap->zap_m.zap_avl, &mze_tofind, &idx); 126387e5029aSahrens if (mze == NULL) { 126487e5029aSahrens mze = avl_nearest(&zc->zc_zap->zap_m.zap_avl, 126587e5029aSahrens idx, AVL_AFTER); 126687e5029aSahrens } 1267fa9e4066Sahrens if (mze) { 1268*3f9d6ad7SLin Ling mzap_ent_phys_t *mzep = MZE_PHYS(zc->zc_zap, mze); 1269*3f9d6ad7SLin Ling ASSERT3U(mze->mze_cd, ==, mzep->mze_cd); 1270da6c28aaSamw za->za_normalization_conflict = 1271da6c28aaSamw mzap_normalization_conflict(zc->zc_zap, NULL, mze); 1272fa9e4066Sahrens za->za_integer_length = 8; 1273fa9e4066Sahrens za->za_num_integers = 1; 1274*3f9d6ad7SLin Ling za->za_first_integer = mzep->mze_value; 1275*3f9d6ad7SLin Ling (void) strcpy(za->za_name, mzep->mze_name); 1276fa9e4066Sahrens zc->zc_hash = mze->mze_hash; 1277*3f9d6ad7SLin Ling zc->zc_cd = mze->mze_cd; 1278fa9e4066Sahrens err = 0; 1279fa9e4066Sahrens } else { 1280fa9e4066Sahrens zc->zc_hash = -1ULL; 1281fa9e4066Sahrens } 1282fa9e4066Sahrens } 128387e5029aSahrens rw_exit(&zc->zc_zap->zap_rwlock); 1284fa9e4066Sahrens return (err); 1285fa9e4066Sahrens } 1286fa9e4066Sahrens 1287fa9e4066Sahrens void 1288fa9e4066Sahrens zap_cursor_advance(zap_cursor_t *zc) 1289fa9e4066Sahrens { 1290fa9e4066Sahrens if (zc->zc_hash == -1ULL) 1291fa9e4066Sahrens return; 1292fa9e4066Sahrens zc->zc_cd++; 1293fa9e4066Sahrens } 1294fa9e4066Sahrens 1295d20e665cSRicardo M. Correia int 1296d20e665cSRicardo M. Correia zap_cursor_move_to_key(zap_cursor_t *zc, const char *name, matchtype_t mt) 1297d20e665cSRicardo M. Correia { 1298d20e665cSRicardo M. Correia int err = 0; 1299d20e665cSRicardo M. Correia mzap_ent_t *mze; 1300d20e665cSRicardo M. Correia zap_name_t *zn; 1301d20e665cSRicardo M. Correia 1302d20e665cSRicardo M. Correia if (zc->zc_zap == NULL) { 1303d20e665cSRicardo M. Correia err = zap_lockdir(zc->zc_objset, zc->zc_zapobj, NULL, 1304d20e665cSRicardo M. Correia RW_READER, TRUE, FALSE, &zc->zc_zap); 1305d20e665cSRicardo M. Correia if (err) 1306d20e665cSRicardo M. Correia return (err); 1307d20e665cSRicardo M. Correia } else { 1308d20e665cSRicardo M. Correia rw_enter(&zc->zc_zap->zap_rwlock, RW_READER); 1309d20e665cSRicardo M. Correia } 1310d20e665cSRicardo M. Correia 1311d20e665cSRicardo M. Correia zn = zap_name_alloc(zc->zc_zap, name, mt); 1312d20e665cSRicardo M. Correia if (zn == NULL) { 1313d20e665cSRicardo M. Correia rw_exit(&zc->zc_zap->zap_rwlock); 1314d20e665cSRicardo M. Correia return (ENOTSUP); 1315d20e665cSRicardo M. Correia } 1316d20e665cSRicardo M. Correia 1317d20e665cSRicardo M. Correia if (!zc->zc_zap->zap_ismicro) { 1318d20e665cSRicardo M. Correia err = fzap_cursor_move_to_key(zc, zn); 1319d20e665cSRicardo M. Correia } else { 1320d20e665cSRicardo M. Correia mze = mze_find(zn); 1321d20e665cSRicardo M. Correia if (mze == NULL) { 1322d20e665cSRicardo M. Correia err = ENOENT; 1323d20e665cSRicardo M. Correia goto out; 1324d20e665cSRicardo M. Correia } 1325d20e665cSRicardo M. Correia zc->zc_hash = mze->mze_hash; 1326*3f9d6ad7SLin Ling zc->zc_cd = mze->mze_cd; 1327d20e665cSRicardo M. Correia } 1328d20e665cSRicardo M. Correia 1329d20e665cSRicardo M. Correia out: 1330d20e665cSRicardo M. Correia zap_name_free(zn); 1331d20e665cSRicardo M. Correia rw_exit(&zc->zc_zap->zap_rwlock); 1332d20e665cSRicardo M. Correia return (err); 1333d20e665cSRicardo M. Correia } 1334d20e665cSRicardo M. Correia 1335fa9e4066Sahrens int 1336fa9e4066Sahrens zap_get_stats(objset_t *os, uint64_t zapobj, zap_stats_t *zs) 1337fa9e4066Sahrens { 1338fa9e4066Sahrens int err; 1339fa9e4066Sahrens zap_t *zap; 1340fa9e4066Sahrens 1341c5f9e431Sahrens err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); 1342fa9e4066Sahrens if (err) 1343fa9e4066Sahrens return (err); 1344fa9e4066Sahrens 1345fa9e4066Sahrens bzero(zs, sizeof (zap_stats_t)); 1346fa9e4066Sahrens 1347fa9e4066Sahrens if (zap->zap_ismicro) { 1348fa9e4066Sahrens zs->zs_blocksize = zap->zap_dbuf->db_size; 1349fa9e4066Sahrens zs->zs_num_entries = zap->zap_m.zap_num_entries; 1350fa9e4066Sahrens zs->zs_num_blocks = 1; 1351fa9e4066Sahrens } else { 1352fa9e4066Sahrens fzap_get_stats(zap, zs); 1353fa9e4066Sahrens } 1354fa9e4066Sahrens zap_unlockdir(zap); 1355fa9e4066Sahrens return (0); 1356fa9e4066Sahrens } 13573d692628SSanjeev Bagewadi 13583d692628SSanjeev Bagewadi int 13593d692628SSanjeev Bagewadi zap_count_write(objset_t *os, uint64_t zapobj, const char *name, int add, 1360720d1aa1SSanjeev Bagewadi uint64_t *towrite, uint64_t *tooverwrite) 13613d692628SSanjeev Bagewadi { 13623d692628SSanjeev Bagewadi zap_t *zap; 13633d692628SSanjeev Bagewadi int err = 0; 13643d692628SSanjeev Bagewadi 13653d692628SSanjeev Bagewadi 13663d692628SSanjeev Bagewadi /* 13673d692628SSanjeev Bagewadi * Since, we don't have a name, we cannot figure out which blocks will 13683d692628SSanjeev Bagewadi * be affected in this operation. So, account for the worst case : 13693d692628SSanjeev Bagewadi * - 3 blocks overwritten: target leaf, ptrtbl block, header block 13703d692628SSanjeev Bagewadi * - 4 new blocks written if adding: 13713d692628SSanjeev Bagewadi * - 2 blocks for possibly split leaves, 13723d692628SSanjeev Bagewadi * - 2 grown ptrtbl blocks 13733d692628SSanjeev Bagewadi * 13743d692628SSanjeev Bagewadi * This also accomodates the case where an add operation to a fairly 13753d692628SSanjeev Bagewadi * large microzap results in a promotion to fatzap. 13763d692628SSanjeev Bagewadi */ 13773d692628SSanjeev Bagewadi if (name == NULL) { 13783d692628SSanjeev Bagewadi *towrite += (3 + (add ? 4 : 0)) * SPA_MAXBLOCKSIZE; 13793d692628SSanjeev Bagewadi return (err); 13803d692628SSanjeev Bagewadi } 13813d692628SSanjeev Bagewadi 13823d692628SSanjeev Bagewadi /* 13833d692628SSanjeev Bagewadi * We lock the zap with adding == FALSE. Because, if we pass 13843d692628SSanjeev Bagewadi * the actual value of add, it could trigger a mzap_upgrade(). 13853d692628SSanjeev Bagewadi * At present we are just evaluating the possibility of this operation 13863d692628SSanjeev Bagewadi * and hence we donot want to trigger an upgrade. 13873d692628SSanjeev Bagewadi */ 13883d692628SSanjeev Bagewadi err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); 13893d692628SSanjeev Bagewadi if (err) 13903d692628SSanjeev Bagewadi return (err); 13913d692628SSanjeev Bagewadi 13923d692628SSanjeev Bagewadi if (!zap->zap_ismicro) { 13933d692628SSanjeev Bagewadi zap_name_t *zn = zap_name_alloc(zap, name, MT_EXACT); 13943d692628SSanjeev Bagewadi if (zn) { 13953d692628SSanjeev Bagewadi err = fzap_count_write(zn, add, towrite, 13963d692628SSanjeev Bagewadi tooverwrite); 13973d692628SSanjeev Bagewadi zap_name_free(zn); 13983d692628SSanjeev Bagewadi } else { 13993d692628SSanjeev Bagewadi /* 14003d692628SSanjeev Bagewadi * We treat this case as similar to (name == NULL) 14013d692628SSanjeev Bagewadi */ 14023d692628SSanjeev Bagewadi *towrite += (3 + (add ? 4 : 0)) * SPA_MAXBLOCKSIZE; 14033d692628SSanjeev Bagewadi } 14043d692628SSanjeev Bagewadi } else { 1405720d1aa1SSanjeev Bagewadi /* 1406720d1aa1SSanjeev Bagewadi * We are here if (name != NULL) and this is a micro-zap. 1407720d1aa1SSanjeev Bagewadi * We account for the header block depending on whether it 1408720d1aa1SSanjeev Bagewadi * is freeable. 1409720d1aa1SSanjeev Bagewadi * 1410720d1aa1SSanjeev Bagewadi * Incase of an add-operation it is hard to find out 1411720d1aa1SSanjeev Bagewadi * if this add will promote this microzap to fatzap. 1412720d1aa1SSanjeev Bagewadi * Hence, we consider the worst case and account for the 1413720d1aa1SSanjeev Bagewadi * blocks assuming this microzap would be promoted to a 1414720d1aa1SSanjeev Bagewadi * fatzap. 1415720d1aa1SSanjeev Bagewadi * 1416720d1aa1SSanjeev Bagewadi * 1 block overwritten : header block 1417720d1aa1SSanjeev Bagewadi * 4 new blocks written : 2 new split leaf, 2 grown 1418720d1aa1SSanjeev Bagewadi * ptrtbl blocks 1419720d1aa1SSanjeev Bagewadi */ 1420720d1aa1SSanjeev Bagewadi if (dmu_buf_freeable(zap->zap_dbuf)) 1421720d1aa1SSanjeev Bagewadi *tooverwrite += SPA_MAXBLOCKSIZE; 1422720d1aa1SSanjeev Bagewadi else 1423720d1aa1SSanjeev Bagewadi *towrite += SPA_MAXBLOCKSIZE; 1424720d1aa1SSanjeev Bagewadi 1425720d1aa1SSanjeev Bagewadi if (add) { 1426720d1aa1SSanjeev Bagewadi *towrite += 4 * SPA_MAXBLOCKSIZE; 14273d692628SSanjeev Bagewadi } 14283d692628SSanjeev Bagewadi } 14293d692628SSanjeev Bagewadi 14303d692628SSanjeev Bagewadi zap_unlockdir(zap); 14313d692628SSanjeev Bagewadi return (err); 14323d692628SSanjeev Bagewadi } 1433