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. 23bf16b11eSMatthew 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> 36b5152584SMatthew Ahrens #include <sys/dmu_objset.h> 37de8267e0Stimh 38de8267e0Stimh #ifdef _KERNEL 39de8267e0Stimh #include <sys/sunddi.h> 40de8267e0Stimh #endif 41fa9e4066Sahrens 42*c1379625SJustin T. Gibbs extern inline mzap_phys_t *zap_m_phys(zap_t *zap); 43*c1379625SJustin T. Gibbs 44b24ab676SJeff Bonwick static int mzap_upgrade(zap_t **zapp, dmu_tx_t *tx, zap_flags_t flags); 45fa9e4066Sahrens 46b24ab676SJeff Bonwick uint64_t 47b24ab676SJeff Bonwick zap_getflags(zap_t *zap) 48b24ab676SJeff Bonwick { 49b24ab676SJeff Bonwick if (zap->zap_ismicro) 50b24ab676SJeff Bonwick return (0); 51*c1379625SJustin T. Gibbs return (zap_f_phys(zap)->zap_flags); 52b24ab676SJeff Bonwick } 53b24ab676SJeff Bonwick 54b24ab676SJeff Bonwick int 55b24ab676SJeff Bonwick zap_hashbits(zap_t *zap) 56b24ab676SJeff Bonwick { 57b24ab676SJeff Bonwick if (zap_getflags(zap) & ZAP_FLAG_HASH64) 58b24ab676SJeff Bonwick return (48); 59b24ab676SJeff Bonwick else 60b24ab676SJeff Bonwick return (28); 61b24ab676SJeff Bonwick } 62b24ab676SJeff Bonwick 63b24ab676SJeff Bonwick uint32_t 64b24ab676SJeff Bonwick zap_maxcd(zap_t *zap) 65b24ab676SJeff Bonwick { 66b24ab676SJeff Bonwick if (zap_getflags(zap) & ZAP_FLAG_HASH64) 67b24ab676SJeff Bonwick return ((1<<16)-1); 68b24ab676SJeff Bonwick else 69b24ab676SJeff Bonwick return (-1U); 70b24ab676SJeff Bonwick } 71fa9e4066Sahrens 72da6c28aaSamw static uint64_t 73b24ab676SJeff Bonwick zap_hash(zap_name_t *zn) 74da6c28aaSamw { 75b24ab676SJeff Bonwick zap_t *zap = zn->zn_zap; 76b24ab676SJeff Bonwick uint64_t h = 0; 77da6c28aaSamw 78b24ab676SJeff Bonwick if (zap_getflags(zap) & ZAP_FLAG_PRE_HASHED_KEY) { 79b24ab676SJeff Bonwick ASSERT(zap_getflags(zap) & ZAP_FLAG_UINT64_KEY); 80b24ab676SJeff Bonwick h = *(uint64_t *)zn->zn_key_orig; 81b24ab676SJeff Bonwick } else { 82b24ab676SJeff Bonwick h = zap->zap_salt; 83b24ab676SJeff Bonwick ASSERT(h != 0); 84b24ab676SJeff Bonwick ASSERT(zfs_crc64_table[128] == ZFS_CRC64_POLY); 85b24ab676SJeff Bonwick 86486ae710SMatthew Ahrens if (zap_getflags(zap) & ZAP_FLAG_UINT64_KEY) { 87486ae710SMatthew Ahrens int i; 88486ae710SMatthew Ahrens const uint64_t *wp = zn->zn_key_norm; 89486ae710SMatthew Ahrens 90486ae710SMatthew Ahrens ASSERT(zn->zn_key_intlen == 8); 91486ae710SMatthew Ahrens for (i = 0; i < zn->zn_key_norm_numints; wp++, i++) { 92486ae710SMatthew Ahrens int j; 93486ae710SMatthew Ahrens uint64_t word = *wp; 94486ae710SMatthew Ahrens 95486ae710SMatthew Ahrens for (j = 0; j < zn->zn_key_intlen; j++) { 96486ae710SMatthew Ahrens h = (h >> 8) ^ 97486ae710SMatthew Ahrens zfs_crc64_table[(h ^ word) & 0xFF]; 98486ae710SMatthew Ahrens word >>= NBBY; 99486ae710SMatthew Ahrens } 100486ae710SMatthew Ahrens } 101486ae710SMatthew Ahrens } else { 102486ae710SMatthew Ahrens int i, len; 103486ae710SMatthew Ahrens const uint8_t *cp = zn->zn_key_norm; 104486ae710SMatthew Ahrens 105486ae710SMatthew Ahrens /* 106486ae710SMatthew Ahrens * We previously stored the terminating null on 107486ae710SMatthew Ahrens * disk, but didn't hash it, so we need to 108486ae710SMatthew Ahrens * continue to not hash it. (The 109486ae710SMatthew Ahrens * zn_key_*_numints includes the terminating 110486ae710SMatthew Ahrens * null for non-binary keys.) 111486ae710SMatthew Ahrens */ 112486ae710SMatthew Ahrens len = zn->zn_key_norm_numints - 1; 113486ae710SMatthew Ahrens 114486ae710SMatthew Ahrens ASSERT(zn->zn_key_intlen == 1); 115486ae710SMatthew Ahrens for (i = 0; i < len; cp++, i++) { 116486ae710SMatthew Ahrens h = (h >> 8) ^ 117486ae710SMatthew Ahrens zfs_crc64_table[(h ^ *cp) & 0xFF]; 118486ae710SMatthew Ahrens } 119486ae710SMatthew Ahrens } 120b24ab676SJeff Bonwick } 121da6c28aaSamw /* 122b24ab676SJeff Bonwick * Don't use all 64 bits, since we need some in the cookie for 123b24ab676SJeff Bonwick * the collision differentiator. We MUST use the high bits, 124b24ab676SJeff Bonwick * since those are the ones that we first pay attention to when 125da6c28aaSamw * chosing the bucket. 126da6c28aaSamw */ 127b24ab676SJeff Bonwick h &= ~((1ULL << (64 - zap_hashbits(zap))) - 1); 128da6c28aaSamw 129b24ab676SJeff Bonwick return (h); 130da6c28aaSamw } 131da6c28aaSamw 132da6c28aaSamw static int 133da6c28aaSamw zap_normalize(zap_t *zap, const char *name, char *namenorm) 134da6c28aaSamw { 135da6c28aaSamw size_t inlen, outlen; 136da6c28aaSamw int err; 137da6c28aaSamw 138b24ab676SJeff Bonwick ASSERT(!(zap_getflags(zap) & ZAP_FLAG_UINT64_KEY)); 139b24ab676SJeff Bonwick 140da6c28aaSamw inlen = strlen(name) + 1; 141da6c28aaSamw outlen = ZAP_MAXNAMELEN; 142da6c28aaSamw 143da6c28aaSamw err = 0; 144da6c28aaSamw (void) u8_textprep_str((char *)name, &inlen, namenorm, &outlen, 145d05ba1e6STim Haley zap->zap_normflags | U8_TEXTPREP_IGNORE_NULL | 146d05ba1e6STim Haley U8_TEXTPREP_IGNORE_INVALID, U8_UNICODE_LATEST, &err); 147da6c28aaSamw 148da6c28aaSamw return (err); 149da6c28aaSamw } 150da6c28aaSamw 151da6c28aaSamw boolean_t 152da6c28aaSamw zap_match(zap_name_t *zn, const char *matchname) 153da6c28aaSamw { 154b24ab676SJeff Bonwick ASSERT(!(zap_getflags(zn->zn_zap) & ZAP_FLAG_UINT64_KEY)); 155b24ab676SJeff Bonwick 156da6c28aaSamw if (zn->zn_matchtype == MT_FIRST) { 157da6c28aaSamw char norm[ZAP_MAXNAMELEN]; 158da6c28aaSamw 159da6c28aaSamw if (zap_normalize(zn->zn_zap, matchname, norm) != 0) 160da6c28aaSamw return (B_FALSE); 161da6c28aaSamw 162b24ab676SJeff Bonwick return (strcmp(zn->zn_key_norm, norm) == 0); 163da6c28aaSamw } else { 164da6c28aaSamw /* MT_BEST or MT_EXACT */ 165b24ab676SJeff Bonwick return (strcmp(zn->zn_key_orig, matchname) == 0); 166da6c28aaSamw } 167da6c28aaSamw } 168da6c28aaSamw 169da6c28aaSamw void 170da6c28aaSamw zap_name_free(zap_name_t *zn) 171da6c28aaSamw { 172da6c28aaSamw kmem_free(zn, sizeof (zap_name_t)); 173da6c28aaSamw } 174da6c28aaSamw 175da6c28aaSamw zap_name_t * 176b24ab676SJeff Bonwick zap_name_alloc(zap_t *zap, const char *key, matchtype_t mt) 177da6c28aaSamw { 178da6c28aaSamw zap_name_t *zn = kmem_alloc(sizeof (zap_name_t), KM_SLEEP); 179da6c28aaSamw 180da6c28aaSamw zn->zn_zap = zap; 181b24ab676SJeff Bonwick zn->zn_key_intlen = sizeof (*key); 182b24ab676SJeff Bonwick zn->zn_key_orig = key; 183486ae710SMatthew Ahrens zn->zn_key_orig_numints = strlen(zn->zn_key_orig) + 1; 184da6c28aaSamw zn->zn_matchtype = mt; 185da6c28aaSamw if (zap->zap_normflags) { 186b24ab676SJeff Bonwick if (zap_normalize(zap, key, zn->zn_normbuf) != 0) { 187da6c28aaSamw zap_name_free(zn); 188da6c28aaSamw return (NULL); 189da6c28aaSamw } 190b24ab676SJeff Bonwick zn->zn_key_norm = zn->zn_normbuf; 191486ae710SMatthew Ahrens zn->zn_key_norm_numints = strlen(zn->zn_key_norm) + 1; 192da6c28aaSamw } else { 193da6c28aaSamw if (mt != MT_EXACT) { 194da6c28aaSamw zap_name_free(zn); 195da6c28aaSamw return (NULL); 196da6c28aaSamw } 197b24ab676SJeff Bonwick zn->zn_key_norm = zn->zn_key_orig; 198486ae710SMatthew Ahrens zn->zn_key_norm_numints = zn->zn_key_orig_numints; 199da6c28aaSamw } 200da6c28aaSamw 201b24ab676SJeff Bonwick zn->zn_hash = zap_hash(zn); 202b24ab676SJeff Bonwick return (zn); 203b24ab676SJeff Bonwick } 204b24ab676SJeff Bonwick 205b24ab676SJeff Bonwick zap_name_t * 206b24ab676SJeff Bonwick zap_name_alloc_uint64(zap_t *zap, const uint64_t *key, int numints) 207b24ab676SJeff Bonwick { 208b24ab676SJeff Bonwick zap_name_t *zn = kmem_alloc(sizeof (zap_name_t), KM_SLEEP); 209b24ab676SJeff Bonwick 210b24ab676SJeff Bonwick ASSERT(zap->zap_normflags == 0); 211b24ab676SJeff Bonwick zn->zn_zap = zap; 212b24ab676SJeff Bonwick zn->zn_key_intlen = sizeof (*key); 213b24ab676SJeff Bonwick zn->zn_key_orig = zn->zn_key_norm = key; 214486ae710SMatthew Ahrens zn->zn_key_orig_numints = zn->zn_key_norm_numints = numints; 215b24ab676SJeff Bonwick zn->zn_matchtype = MT_EXACT; 216b24ab676SJeff Bonwick 217b24ab676SJeff Bonwick zn->zn_hash = zap_hash(zn); 218da6c28aaSamw return (zn); 219da6c28aaSamw } 220da6c28aaSamw 221fa9e4066Sahrens static void 222fa9e4066Sahrens mzap_byteswap(mzap_phys_t *buf, size_t size) 223fa9e4066Sahrens { 224fa9e4066Sahrens int i, max; 225fa9e4066Sahrens buf->mz_block_type = BSWAP_64(buf->mz_block_type); 226fa9e4066Sahrens buf->mz_salt = BSWAP_64(buf->mz_salt); 227ab04eb8eStimh buf->mz_normflags = BSWAP_64(buf->mz_normflags); 228fa9e4066Sahrens max = (size / MZAP_ENT_LEN) - 1; 229fa9e4066Sahrens for (i = 0; i < max; i++) { 230fa9e4066Sahrens buf->mz_chunk[i].mze_value = 231fa9e4066Sahrens BSWAP_64(buf->mz_chunk[i].mze_value); 232fa9e4066Sahrens buf->mz_chunk[i].mze_cd = 233fa9e4066Sahrens BSWAP_32(buf->mz_chunk[i].mze_cd); 234fa9e4066Sahrens } 235fa9e4066Sahrens } 236fa9e4066Sahrens 237fa9e4066Sahrens void 238fa9e4066Sahrens zap_byteswap(void *buf, size_t size) 239fa9e4066Sahrens { 240fa9e4066Sahrens uint64_t block_type; 241fa9e4066Sahrens 242fa9e4066Sahrens block_type = *(uint64_t *)buf; 243fa9e4066Sahrens 2445ad82045Snd if (block_type == ZBT_MICRO || block_type == BSWAP_64(ZBT_MICRO)) { 245fa9e4066Sahrens /* ASSERT(magic == ZAP_LEAF_MAGIC); */ 246fa9e4066Sahrens mzap_byteswap(buf, size); 2475ad82045Snd } else { 248fa9e4066Sahrens fzap_byteswap(buf, size); 249fa9e4066Sahrens } 250fa9e4066Sahrens } 251fa9e4066Sahrens 252fa9e4066Sahrens static int 253fa9e4066Sahrens mze_compare(const void *arg1, const void *arg2) 254fa9e4066Sahrens { 255fa9e4066Sahrens const mzap_ent_t *mze1 = arg1; 256fa9e4066Sahrens const mzap_ent_t *mze2 = arg2; 257fa9e4066Sahrens 258fa9e4066Sahrens if (mze1->mze_hash > mze2->mze_hash) 259fa9e4066Sahrens return (+1); 260fa9e4066Sahrens if (mze1->mze_hash < mze2->mze_hash) 261fa9e4066Sahrens return (-1); 2623f9d6ad7SLin Ling if (mze1->mze_cd > mze2->mze_cd) 263fa9e4066Sahrens return (+1); 2643f9d6ad7SLin Ling if (mze1->mze_cd < mze2->mze_cd) 265fa9e4066Sahrens return (-1); 266fa9e4066Sahrens return (0); 267fa9e4066Sahrens } 268fa9e4066Sahrens 269fa9e4066Sahrens static void 2703f9d6ad7SLin Ling mze_insert(zap_t *zap, int chunkid, uint64_t hash) 271fa9e4066Sahrens { 272fa9e4066Sahrens mzap_ent_t *mze; 273fa9e4066Sahrens 274fa9e4066Sahrens ASSERT(zap->zap_ismicro); 275fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 276fa9e4066Sahrens 277fa9e4066Sahrens mze = kmem_alloc(sizeof (mzap_ent_t), KM_SLEEP); 278fa9e4066Sahrens mze->mze_chunkid = chunkid; 279fa9e4066Sahrens mze->mze_hash = hash; 2803f9d6ad7SLin Ling mze->mze_cd = MZE_PHYS(zap, mze)->mze_cd; 2813f9d6ad7SLin Ling ASSERT(MZE_PHYS(zap, mze)->mze_name[0] != 0); 282fa9e4066Sahrens avl_add(&zap->zap_m.zap_avl, mze); 283fa9e4066Sahrens } 284fa9e4066Sahrens 285fa9e4066Sahrens static mzap_ent_t * 286da6c28aaSamw mze_find(zap_name_t *zn) 287fa9e4066Sahrens { 288fa9e4066Sahrens mzap_ent_t mze_tofind; 289fa9e4066Sahrens mzap_ent_t *mze; 290fa9e4066Sahrens avl_index_t idx; 291da6c28aaSamw avl_tree_t *avl = &zn->zn_zap->zap_m.zap_avl; 292fa9e4066Sahrens 293da6c28aaSamw ASSERT(zn->zn_zap->zap_ismicro); 294da6c28aaSamw ASSERT(RW_LOCK_HELD(&zn->zn_zap->zap_rwlock)); 295fa9e4066Sahrens 296da6c28aaSamw mze_tofind.mze_hash = zn->zn_hash; 2973f9d6ad7SLin Ling mze_tofind.mze_cd = 0; 298fa9e4066Sahrens 299da6c28aaSamw again: 300fa9e4066Sahrens mze = avl_find(avl, &mze_tofind, &idx); 301fa9e4066Sahrens if (mze == NULL) 302fa9e4066Sahrens mze = avl_nearest(avl, idx, AVL_AFTER); 303da6c28aaSamw for (; mze && mze->mze_hash == zn->zn_hash; mze = AVL_NEXT(avl, mze)) { 3043f9d6ad7SLin Ling ASSERT3U(mze->mze_cd, ==, MZE_PHYS(zn->zn_zap, mze)->mze_cd); 3053f9d6ad7SLin Ling if (zap_match(zn, MZE_PHYS(zn->zn_zap, mze)->mze_name)) 306fa9e4066Sahrens return (mze); 307fa9e4066Sahrens } 308da6c28aaSamw if (zn->zn_matchtype == MT_BEST) { 309da6c28aaSamw zn->zn_matchtype = MT_FIRST; 310da6c28aaSamw goto again; 311da6c28aaSamw } 312fa9e4066Sahrens return (NULL); 313fa9e4066Sahrens } 314fa9e4066Sahrens 315fa9e4066Sahrens static uint32_t 316fa9e4066Sahrens mze_find_unused_cd(zap_t *zap, uint64_t hash) 317fa9e4066Sahrens { 318fa9e4066Sahrens mzap_ent_t mze_tofind; 319fa9e4066Sahrens mzap_ent_t *mze; 320fa9e4066Sahrens avl_index_t idx; 321fa9e4066Sahrens avl_tree_t *avl = &zap->zap_m.zap_avl; 322fa9e4066Sahrens uint32_t cd; 323fa9e4066Sahrens 324fa9e4066Sahrens ASSERT(zap->zap_ismicro); 325fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 326fa9e4066Sahrens 327fa9e4066Sahrens mze_tofind.mze_hash = hash; 3283f9d6ad7SLin Ling mze_tofind.mze_cd = 0; 329fa9e4066Sahrens 330fa9e4066Sahrens cd = 0; 331fa9e4066Sahrens for (mze = avl_find(avl, &mze_tofind, &idx); 332fa9e4066Sahrens mze && mze->mze_hash == hash; mze = AVL_NEXT(avl, mze)) { 3333f9d6ad7SLin Ling if (mze->mze_cd != cd) 334fa9e4066Sahrens break; 335fa9e4066Sahrens cd++; 336fa9e4066Sahrens } 337fa9e4066Sahrens 338fa9e4066Sahrens return (cd); 339fa9e4066Sahrens } 340fa9e4066Sahrens 341fa9e4066Sahrens static void 342fa9e4066Sahrens mze_remove(zap_t *zap, mzap_ent_t *mze) 343fa9e4066Sahrens { 344fa9e4066Sahrens ASSERT(zap->zap_ismicro); 345fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 346fa9e4066Sahrens 347fa9e4066Sahrens avl_remove(&zap->zap_m.zap_avl, mze); 348fa9e4066Sahrens kmem_free(mze, sizeof (mzap_ent_t)); 349fa9e4066Sahrens } 350fa9e4066Sahrens 351fa9e4066Sahrens static void 352fa9e4066Sahrens mze_destroy(zap_t *zap) 353fa9e4066Sahrens { 354fa9e4066Sahrens mzap_ent_t *mze; 355fa9e4066Sahrens void *avlcookie = NULL; 356fa9e4066Sahrens 357fa9e4066Sahrens while (mze = avl_destroy_nodes(&zap->zap_m.zap_avl, &avlcookie)) 358fa9e4066Sahrens kmem_free(mze, sizeof (mzap_ent_t)); 359fa9e4066Sahrens avl_destroy(&zap->zap_m.zap_avl); 360fa9e4066Sahrens } 361fa9e4066Sahrens 362fa9e4066Sahrens static zap_t * 363fa9e4066Sahrens mzap_open(objset_t *os, uint64_t obj, dmu_buf_t *db) 364fa9e4066Sahrens { 365fa9e4066Sahrens zap_t *winner; 366fa9e4066Sahrens zap_t *zap; 367fa9e4066Sahrens int i; 368fa9e4066Sahrens 369fa9e4066Sahrens ASSERT3U(MZAP_ENT_LEN, ==, sizeof (mzap_ent_phys_t)); 370fa9e4066Sahrens 371fa9e4066Sahrens zap = kmem_zalloc(sizeof (zap_t), KM_SLEEP); 372fa9e4066Sahrens rw_init(&zap->zap_rwlock, 0, 0, 0); 373fa9e4066Sahrens rw_enter(&zap->zap_rwlock, RW_WRITER); 374fa9e4066Sahrens zap->zap_objset = os; 375fa9e4066Sahrens zap->zap_object = obj; 376fa9e4066Sahrens zap->zap_dbuf = db; 377fa9e4066Sahrens 378da6c28aaSamw if (*(uint64_t *)db->db_data != ZBT_MICRO) { 379fa9e4066Sahrens mutex_init(&zap->zap_f.zap_num_entries_mtx, 0, 0, 0); 380bf16b11eSMatthew Ahrens zap->zap_f.zap_block_shift = highbit64(db->db_size) - 1; 381fa9e4066Sahrens } else { 382fa9e4066Sahrens zap->zap_ismicro = TRUE; 383fa9e4066Sahrens } 384fa9e4066Sahrens 385fa9e4066Sahrens /* 386fa9e4066Sahrens * Make sure that zap_ismicro is set before we let others see 387fa9e4066Sahrens * it, because zap_lockdir() checks zap_ismicro without the lock 388fa9e4066Sahrens * held. 389fa9e4066Sahrens */ 390*c1379625SJustin T. Gibbs winner = dmu_buf_set_user(db, zap, zap_evict); 391fa9e4066Sahrens 392fa9e4066Sahrens if (winner != NULL) { 393c25056deSgw rw_exit(&zap->zap_rwlock); 394c25056deSgw rw_destroy(&zap->zap_rwlock); 395c25056deSgw if (!zap->zap_ismicro) 396c25056deSgw mutex_destroy(&zap->zap_f.zap_num_entries_mtx); 397fa9e4066Sahrens kmem_free(zap, sizeof (zap_t)); 398fa9e4066Sahrens return (winner); 399fa9e4066Sahrens } 400fa9e4066Sahrens 401fa9e4066Sahrens if (zap->zap_ismicro) { 402*c1379625SJustin T. Gibbs zap->zap_salt = zap_m_phys(zap)->mz_salt; 403*c1379625SJustin T. Gibbs zap->zap_normflags = zap_m_phys(zap)->mz_normflags; 404fa9e4066Sahrens zap->zap_m.zap_num_chunks = db->db_size / MZAP_ENT_LEN - 1; 405fa9e4066Sahrens avl_create(&zap->zap_m.zap_avl, mze_compare, 406fa9e4066Sahrens sizeof (mzap_ent_t), offsetof(mzap_ent_t, mze_node)); 407fa9e4066Sahrens 408fa9e4066Sahrens for (i = 0; i < zap->zap_m.zap_num_chunks; i++) { 409fa9e4066Sahrens mzap_ent_phys_t *mze = 410*c1379625SJustin T. Gibbs &zap_m_phys(zap)->mz_chunk[i]; 411fa9e4066Sahrens if (mze->mze_name[0]) { 412da6c28aaSamw zap_name_t *zn; 413da6c28aaSamw 414fa9e4066Sahrens zap->zap_m.zap_num_entries++; 415da6c28aaSamw zn = zap_name_alloc(zap, mze->mze_name, 416da6c28aaSamw MT_EXACT); 4173f9d6ad7SLin Ling mze_insert(zap, i, zn->zn_hash); 418da6c28aaSamw zap_name_free(zn); 419fa9e4066Sahrens } 420fa9e4066Sahrens } 421fa9e4066Sahrens } else { 422*c1379625SJustin T. Gibbs zap->zap_salt = zap_f_phys(zap)->zap_salt; 423*c1379625SJustin T. Gibbs zap->zap_normflags = zap_f_phys(zap)->zap_normflags; 424f65e61c0Sahrens 425f65e61c0Sahrens ASSERT3U(sizeof (struct zap_leaf_header), ==, 426f65e61c0Sahrens 2*ZAP_LEAF_CHUNKSIZE); 427f65e61c0Sahrens 428f65e61c0Sahrens /* 429f65e61c0Sahrens * The embedded pointer table should not overlap the 430f65e61c0Sahrens * other members. 431f65e61c0Sahrens */ 432f65e61c0Sahrens ASSERT3P(&ZAP_EMBEDDED_PTRTBL_ENT(zap, 0), >, 433*c1379625SJustin T. Gibbs &zap_f_phys(zap)->zap_salt); 434f65e61c0Sahrens 435f65e61c0Sahrens /* 436f65e61c0Sahrens * The embedded pointer table should end at the end of 437f65e61c0Sahrens * the block 438f65e61c0Sahrens */ 439f65e61c0Sahrens ASSERT3U((uintptr_t)&ZAP_EMBEDDED_PTRTBL_ENT(zap, 440f65e61c0Sahrens 1<<ZAP_EMBEDDED_PTRTBL_SHIFT(zap)) - 441*c1379625SJustin T. Gibbs (uintptr_t)zap_f_phys(zap), ==, 442f65e61c0Sahrens zap->zap_dbuf->db_size); 443fa9e4066Sahrens } 444fa9e4066Sahrens rw_exit(&zap->zap_rwlock); 445fa9e4066Sahrens return (zap); 446fa9e4066Sahrens } 447fa9e4066Sahrens 448fa9e4066Sahrens int 449fa9e4066Sahrens zap_lockdir(objset_t *os, uint64_t obj, dmu_tx_t *tx, 450c5f9e431Sahrens krw_t lti, boolean_t fatreader, boolean_t adding, zap_t **zapp) 451fa9e4066Sahrens { 452fa9e4066Sahrens zap_t *zap; 453fa9e4066Sahrens dmu_buf_t *db; 454fa9e4066Sahrens krw_t lt; 455fa9e4066Sahrens int err; 456fa9e4066Sahrens 457fa9e4066Sahrens *zapp = NULL; 458fa9e4066Sahrens 45947cb52daSJeff Bonwick err = dmu_buf_hold(os, obj, 0, NULL, &db, DMU_READ_NO_PREFETCH); 460ea8dc4b6Seschrock if (err) 461ea8dc4b6Seschrock return (err); 462fa9e4066Sahrens 463fa9e4066Sahrens #ifdef ZFS_DEBUG 464fa9e4066Sahrens { 465fa9e4066Sahrens dmu_object_info_t doi; 466fa9e4066Sahrens dmu_object_info_from_db(db, &doi); 467ad135b5dSChristopher Siden ASSERT3U(DMU_OT_BYTESWAP(doi.doi_type), ==, DMU_BSWAP_ZAP); 468fa9e4066Sahrens } 469fa9e4066Sahrens #endif 470fa9e4066Sahrens 471fa9e4066Sahrens zap = dmu_buf_get_user(db); 472fa9e4066Sahrens if (zap == NULL) 473fa9e4066Sahrens zap = mzap_open(os, obj, db); 474fa9e4066Sahrens 475fa9e4066Sahrens /* 476fa9e4066Sahrens * We're checking zap_ismicro without the lock held, in order to 477fa9e4066Sahrens * tell what type of lock we want. Once we have some sort of 478fa9e4066Sahrens * lock, see if it really is the right type. In practice this 479fa9e4066Sahrens * can only be different if it was upgraded from micro to fat, 480fa9e4066Sahrens * and micro wanted WRITER but fat only needs READER. 481fa9e4066Sahrens */ 482fa9e4066Sahrens lt = (!zap->zap_ismicro && fatreader) ? RW_READER : lti; 483fa9e4066Sahrens rw_enter(&zap->zap_rwlock, lt); 484fa9e4066Sahrens if (lt != ((!zap->zap_ismicro && fatreader) ? RW_READER : lti)) { 485fa9e4066Sahrens /* it was upgraded, now we only need reader */ 486fa9e4066Sahrens ASSERT(lt == RW_WRITER); 487fa9e4066Sahrens ASSERT(RW_READER == 488fa9e4066Sahrens (!zap->zap_ismicro && fatreader) ? RW_READER : lti); 489fa9e4066Sahrens rw_downgrade(&zap->zap_rwlock); 490fa9e4066Sahrens lt = RW_READER; 491fa9e4066Sahrens } 492fa9e4066Sahrens 493fa9e4066Sahrens zap->zap_objset = os; 494fa9e4066Sahrens 495fa9e4066Sahrens if (lt == RW_WRITER) 496fa9e4066Sahrens dmu_buf_will_dirty(db, tx); 497fa9e4066Sahrens 498fa9e4066Sahrens ASSERT3P(zap->zap_dbuf, ==, db); 499fa9e4066Sahrens 500fa9e4066Sahrens ASSERT(!zap->zap_ismicro || 501fa9e4066Sahrens zap->zap_m.zap_num_entries <= zap->zap_m.zap_num_chunks); 502c5f9e431Sahrens if (zap->zap_ismicro && tx && adding && 503fa9e4066Sahrens zap->zap_m.zap_num_entries == zap->zap_m.zap_num_chunks) { 504fa9e4066Sahrens uint64_t newsz = db->db_size + SPA_MINBLOCKSIZE; 505fa9e4066Sahrens if (newsz > MZAP_MAX_BLKSZ) { 506fa9e4066Sahrens dprintf("upgrading obj %llu: num_entries=%u\n", 507fa9e4066Sahrens obj, zap->zap_m.zap_num_entries); 508fa9e4066Sahrens *zapp = zap; 509b24ab676SJeff Bonwick return (mzap_upgrade(zapp, tx, 0)); 510fa9e4066Sahrens } 511fa9e4066Sahrens err = dmu_object_set_blocksize(os, obj, newsz, 0, tx); 512fb09f5aaSMadhav Suresh ASSERT0(err); 513fa9e4066Sahrens zap->zap_m.zap_num_chunks = 514fa9e4066Sahrens db->db_size / MZAP_ENT_LEN - 1; 515fa9e4066Sahrens } 516fa9e4066Sahrens 517fa9e4066Sahrens *zapp = zap; 518fa9e4066Sahrens return (0); 519fa9e4066Sahrens } 520fa9e4066Sahrens 521fa9e4066Sahrens void 522fa9e4066Sahrens zap_unlockdir(zap_t *zap) 523fa9e4066Sahrens { 524fa9e4066Sahrens rw_exit(&zap->zap_rwlock); 525ea8dc4b6Seschrock dmu_buf_rele(zap->zap_dbuf, NULL); 526fa9e4066Sahrens } 527fa9e4066Sahrens 528ad860c82Sbonwick static int 529b24ab676SJeff Bonwick mzap_upgrade(zap_t **zapp, dmu_tx_t *tx, zap_flags_t flags) 530fa9e4066Sahrens { 531fa9e4066Sahrens mzap_phys_t *mzp; 532b24ab676SJeff Bonwick int i, sz, nchunks; 533b24ab676SJeff Bonwick int err = 0; 534ad860c82Sbonwick zap_t *zap = *zapp; 535fa9e4066Sahrens 536fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 537fa9e4066Sahrens 538fa9e4066Sahrens sz = zap->zap_dbuf->db_size; 539fa9e4066Sahrens mzp = kmem_alloc(sz, KM_SLEEP); 540fa9e4066Sahrens bcopy(zap->zap_dbuf->db_data, mzp, sz); 541fa9e4066Sahrens nchunks = zap->zap_m.zap_num_chunks; 542fa9e4066Sahrens 543b24ab676SJeff Bonwick if (!flags) { 544b24ab676SJeff Bonwick err = dmu_object_set_blocksize(zap->zap_objset, zap->zap_object, 545b24ab676SJeff Bonwick 1ULL << fzap_default_block_shift, 0, tx); 546b24ab676SJeff Bonwick if (err) { 547b24ab676SJeff Bonwick kmem_free(mzp, sz); 548b24ab676SJeff Bonwick return (err); 549b24ab676SJeff Bonwick } 550ad860c82Sbonwick } 551fa9e4066Sahrens 552fa9e4066Sahrens dprintf("upgrading obj=%llu with %u chunks\n", 553fa9e4066Sahrens zap->zap_object, nchunks); 554da6c28aaSamw /* XXX destroy the avl later, so we can use the stored hash value */ 555fa9e4066Sahrens mze_destroy(zap); 556fa9e4066Sahrens 557b24ab676SJeff Bonwick fzap_upgrade(zap, tx, flags); 558fa9e4066Sahrens 559fa9e4066Sahrens for (i = 0; i < nchunks; i++) { 560fa9e4066Sahrens mzap_ent_phys_t *mze = &mzp->mz_chunk[i]; 561da6c28aaSamw zap_name_t *zn; 562fa9e4066Sahrens if (mze->mze_name[0] == 0) 563fa9e4066Sahrens continue; 564fa9e4066Sahrens dprintf("adding %s=%llu\n", 565fa9e4066Sahrens mze->mze_name, mze->mze_value); 566da6c28aaSamw zn = zap_name_alloc(zap, mze->mze_name, MT_EXACT); 567ad860c82Sbonwick err = fzap_add_cd(zn, 8, 1, &mze->mze_value, mze->mze_cd, tx); 568ad860c82Sbonwick zap = zn->zn_zap; /* fzap_add_cd() may change zap */ 569da6c28aaSamw zap_name_free(zn); 570ad860c82Sbonwick if (err) 571ad860c82Sbonwick break; 572fa9e4066Sahrens } 573fa9e4066Sahrens kmem_free(mzp, sz); 574ad860c82Sbonwick *zapp = zap; 575ad860c82Sbonwick return (err); 576fa9e4066Sahrens } 577fa9e4066Sahrens 5782acef22dSMatthew Ahrens void 579b24ab676SJeff Bonwick mzap_create_impl(objset_t *os, uint64_t obj, int normflags, zap_flags_t flags, 580b24ab676SJeff Bonwick dmu_tx_t *tx) 581fa9e4066Sahrens { 582fa9e4066Sahrens dmu_buf_t *db; 583fa9e4066Sahrens mzap_phys_t *zp; 584fa9e4066Sahrens 58547cb52daSJeff Bonwick VERIFY(0 == dmu_buf_hold(os, obj, 0, FTAG, &db, DMU_READ_NO_PREFETCH)); 586fa9e4066Sahrens 587fa9e4066Sahrens #ifdef ZFS_DEBUG 588fa9e4066Sahrens { 589fa9e4066Sahrens dmu_object_info_t doi; 590fa9e4066Sahrens dmu_object_info_from_db(db, &doi); 591ad135b5dSChristopher Siden ASSERT3U(DMU_OT_BYTESWAP(doi.doi_type), ==, DMU_BSWAP_ZAP); 592fa9e4066Sahrens } 593fa9e4066Sahrens #endif 594fa9e4066Sahrens 595fa9e4066Sahrens dmu_buf_will_dirty(db, tx); 596fa9e4066Sahrens zp = db->db_data; 597fa9e4066Sahrens zp->mz_block_type = ZBT_MICRO; 598fa9e4066Sahrens zp->mz_salt = ((uintptr_t)db ^ (uintptr_t)tx ^ (obj << 1)) | 1ULL; 599da6c28aaSamw zp->mz_normflags = normflags; 600ea8dc4b6Seschrock dmu_buf_rele(db, FTAG); 601b24ab676SJeff Bonwick 602b24ab676SJeff Bonwick if (flags != 0) { 603b24ab676SJeff Bonwick zap_t *zap; 604b24ab676SJeff Bonwick /* Only fat zap supports flags; upgrade immediately. */ 605b24ab676SJeff Bonwick VERIFY(0 == zap_lockdir(os, obj, tx, RW_WRITER, 606b24ab676SJeff Bonwick B_FALSE, B_FALSE, &zap)); 607b420f3adSRichard Lowe VERIFY3U(0, ==, mzap_upgrade(&zap, tx, flags)); 608b24ab676SJeff Bonwick zap_unlockdir(zap); 609b24ab676SJeff Bonwick } 610fa9e4066Sahrens } 611fa9e4066Sahrens 612fa9e4066Sahrens int 613fa9e4066Sahrens zap_create_claim(objset_t *os, uint64_t obj, dmu_object_type_t ot, 614fa9e4066Sahrens dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) 615da6c28aaSamw { 616da6c28aaSamw return (zap_create_claim_norm(os, obj, 617da6c28aaSamw 0, ot, bonustype, bonuslen, tx)); 618da6c28aaSamw } 619da6c28aaSamw 620da6c28aaSamw int 621da6c28aaSamw zap_create_claim_norm(objset_t *os, uint64_t obj, int normflags, 622da6c28aaSamw dmu_object_type_t ot, 623da6c28aaSamw dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) 624fa9e4066Sahrens { 625fa9e4066Sahrens int err; 626fa9e4066Sahrens 627fa9e4066Sahrens err = dmu_object_claim(os, obj, ot, 0, bonustype, bonuslen, tx); 628fa9e4066Sahrens if (err != 0) 629fa9e4066Sahrens return (err); 630b24ab676SJeff Bonwick mzap_create_impl(os, obj, normflags, 0, tx); 631fa9e4066Sahrens return (0); 632fa9e4066Sahrens } 633fa9e4066Sahrens 634fa9e4066Sahrens uint64_t 635fa9e4066Sahrens zap_create(objset_t *os, dmu_object_type_t ot, 636fa9e4066Sahrens dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) 637da6c28aaSamw { 638da6c28aaSamw return (zap_create_norm(os, 0, ot, bonustype, bonuslen, tx)); 639da6c28aaSamw } 640da6c28aaSamw 641da6c28aaSamw uint64_t 642da6c28aaSamw zap_create_norm(objset_t *os, int normflags, dmu_object_type_t ot, 643da6c28aaSamw dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) 644fa9e4066Sahrens { 645fa9e4066Sahrens uint64_t obj = dmu_object_alloc(os, ot, 0, bonustype, bonuslen, tx); 646fa9e4066Sahrens 647b24ab676SJeff Bonwick mzap_create_impl(os, obj, normflags, 0, tx); 648b24ab676SJeff Bonwick return (obj); 649b24ab676SJeff Bonwick } 650b24ab676SJeff Bonwick 651b24ab676SJeff Bonwick uint64_t 652b24ab676SJeff Bonwick zap_create_flags(objset_t *os, int normflags, zap_flags_t flags, 653b24ab676SJeff Bonwick dmu_object_type_t ot, int leaf_blockshift, int indirect_blockshift, 654b24ab676SJeff Bonwick dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) 655b24ab676SJeff Bonwick { 656b24ab676SJeff Bonwick uint64_t obj = dmu_object_alloc(os, ot, 0, bonustype, bonuslen, tx); 657b24ab676SJeff Bonwick 658b24ab676SJeff Bonwick ASSERT(leaf_blockshift >= SPA_MINBLOCKSHIFT && 659b5152584SMatthew Ahrens leaf_blockshift <= SPA_OLD_MAXBLOCKSHIFT && 660b24ab676SJeff Bonwick indirect_blockshift >= SPA_MINBLOCKSHIFT && 661b5152584SMatthew Ahrens indirect_blockshift <= SPA_OLD_MAXBLOCKSHIFT); 662b24ab676SJeff Bonwick 663b24ab676SJeff Bonwick VERIFY(dmu_object_set_blocksize(os, obj, 664b24ab676SJeff Bonwick 1ULL << leaf_blockshift, indirect_blockshift, tx) == 0); 665b24ab676SJeff Bonwick 666b24ab676SJeff Bonwick mzap_create_impl(os, obj, normflags, flags, tx); 667fa9e4066Sahrens return (obj); 668fa9e4066Sahrens } 669fa9e4066Sahrens 670fa9e4066Sahrens int 671fa9e4066Sahrens zap_destroy(objset_t *os, uint64_t zapobj, dmu_tx_t *tx) 672fa9e4066Sahrens { 673fa9e4066Sahrens /* 674fa9e4066Sahrens * dmu_object_free will free the object number and free the 675fa9e4066Sahrens * data. Freeing the data will cause our pageout function to be 676fa9e4066Sahrens * called, which will destroy our data (zap_leaf_t's and zap_t). 677fa9e4066Sahrens */ 678fa9e4066Sahrens 679fa9e4066Sahrens return (dmu_object_free(os, zapobj, tx)); 680fa9e4066Sahrens } 681fa9e4066Sahrens 682fa9e4066Sahrens _NOTE(ARGSUSED(0)) 683fa9e4066Sahrens void 684455d5089Sahrens zap_evict(dmu_buf_t *db, void *vzap) 685fa9e4066Sahrens { 686455d5089Sahrens zap_t *zap = vzap; 687fa9e4066Sahrens 688fa9e4066Sahrens rw_destroy(&zap->zap_rwlock); 689fa9e4066Sahrens 690f65e61c0Sahrens if (zap->zap_ismicro) 691fa9e4066Sahrens mze_destroy(zap); 692c25056deSgw else 693c25056deSgw mutex_destroy(&zap->zap_f.zap_num_entries_mtx); 694fa9e4066Sahrens 695fa9e4066Sahrens kmem_free(zap, sizeof (zap_t)); 696fa9e4066Sahrens } 697fa9e4066Sahrens 698fa9e4066Sahrens int 699fa9e4066Sahrens zap_count(objset_t *os, uint64_t zapobj, uint64_t *count) 700fa9e4066Sahrens { 701fa9e4066Sahrens zap_t *zap; 702fa9e4066Sahrens int err; 703fa9e4066Sahrens 704c5f9e431Sahrens err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); 705fa9e4066Sahrens if (err) 706fa9e4066Sahrens return (err); 707fa9e4066Sahrens if (!zap->zap_ismicro) { 708fa9e4066Sahrens err = fzap_count(zap, count); 709fa9e4066Sahrens } else { 710fa9e4066Sahrens *count = zap->zap_m.zap_num_entries; 711fa9e4066Sahrens } 712fa9e4066Sahrens zap_unlockdir(zap); 713fa9e4066Sahrens return (err); 714fa9e4066Sahrens } 715fa9e4066Sahrens 716fa9e4066Sahrens /* 717da6c28aaSamw * zn may be NULL; if not specified, it will be computed if needed. 718da6c28aaSamw * See also the comment above zap_entry_normalization_conflict(). 719da6c28aaSamw */ 720da6c28aaSamw static boolean_t 721da6c28aaSamw mzap_normalization_conflict(zap_t *zap, zap_name_t *zn, mzap_ent_t *mze) 722da6c28aaSamw { 723da6c28aaSamw mzap_ent_t *other; 724da6c28aaSamw int direction = AVL_BEFORE; 725da6c28aaSamw boolean_t allocdzn = B_FALSE; 726da6c28aaSamw 727da6c28aaSamw if (zap->zap_normflags == 0) 728da6c28aaSamw return (B_FALSE); 729da6c28aaSamw 730da6c28aaSamw again: 731da6c28aaSamw for (other = avl_walk(&zap->zap_m.zap_avl, mze, direction); 732da6c28aaSamw other && other->mze_hash == mze->mze_hash; 733da6c28aaSamw other = avl_walk(&zap->zap_m.zap_avl, other, direction)) { 734da6c28aaSamw 735da6c28aaSamw if (zn == NULL) { 7363f9d6ad7SLin Ling zn = zap_name_alloc(zap, MZE_PHYS(zap, mze)->mze_name, 737da6c28aaSamw MT_FIRST); 738da6c28aaSamw allocdzn = B_TRUE; 739da6c28aaSamw } 7403f9d6ad7SLin Ling if (zap_match(zn, MZE_PHYS(zap, other)->mze_name)) { 741da6c28aaSamw if (allocdzn) 742da6c28aaSamw zap_name_free(zn); 743da6c28aaSamw return (B_TRUE); 744da6c28aaSamw } 745da6c28aaSamw } 746da6c28aaSamw 747da6c28aaSamw if (direction == AVL_BEFORE) { 748da6c28aaSamw direction = AVL_AFTER; 749da6c28aaSamw goto again; 750da6c28aaSamw } 751da6c28aaSamw 752da6c28aaSamw if (allocdzn) 753da6c28aaSamw zap_name_free(zn); 754da6c28aaSamw return (B_FALSE); 755da6c28aaSamw } 756da6c28aaSamw 757da6c28aaSamw /* 758da6c28aaSamw * Routines for manipulating attributes. 759fa9e4066Sahrens */ 760fa9e4066Sahrens 761fa9e4066Sahrens int 762fa9e4066Sahrens zap_lookup(objset_t *os, uint64_t zapobj, const char *name, 763fa9e4066Sahrens uint64_t integer_size, uint64_t num_integers, void *buf) 764da6c28aaSamw { 765da6c28aaSamw return (zap_lookup_norm(os, zapobj, name, integer_size, 766da6c28aaSamw num_integers, buf, MT_EXACT, NULL, 0, NULL)); 767da6c28aaSamw } 768da6c28aaSamw 769da6c28aaSamw int 770da6c28aaSamw zap_lookup_norm(objset_t *os, uint64_t zapobj, const char *name, 771da6c28aaSamw uint64_t integer_size, uint64_t num_integers, void *buf, 772da6c28aaSamw matchtype_t mt, char *realname, int rn_len, 773da6c28aaSamw boolean_t *ncp) 774fa9e4066Sahrens { 775fa9e4066Sahrens zap_t *zap; 776fa9e4066Sahrens int err; 777fa9e4066Sahrens mzap_ent_t *mze; 778da6c28aaSamw zap_name_t *zn; 779fa9e4066Sahrens 780c5f9e431Sahrens err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); 781fa9e4066Sahrens if (err) 782fa9e4066Sahrens return (err); 783da6c28aaSamw zn = zap_name_alloc(zap, name, mt); 784da6c28aaSamw if (zn == NULL) { 785da6c28aaSamw zap_unlockdir(zap); 786be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 787da6c28aaSamw } 788da6c28aaSamw 789fa9e4066Sahrens if (!zap->zap_ismicro) { 790da6c28aaSamw err = fzap_lookup(zn, integer_size, num_integers, buf, 791da6c28aaSamw realname, rn_len, ncp); 792fa9e4066Sahrens } else { 793da6c28aaSamw mze = mze_find(zn); 794fa9e4066Sahrens if (mze == NULL) { 795be6fd75aSMatthew Ahrens err = SET_ERROR(ENOENT); 796fa9e4066Sahrens } else { 797da6c28aaSamw if (num_integers < 1) { 798be6fd75aSMatthew Ahrens err = SET_ERROR(EOVERFLOW); 799da6c28aaSamw } else if (integer_size != 8) { 800be6fd75aSMatthew Ahrens err = SET_ERROR(EINVAL); 801da6c28aaSamw } else { 8023f9d6ad7SLin Ling *(uint64_t *)buf = 8033f9d6ad7SLin Ling MZE_PHYS(zap, mze)->mze_value; 804da6c28aaSamw (void) strlcpy(realname, 8053f9d6ad7SLin Ling MZE_PHYS(zap, mze)->mze_name, rn_len); 806da6c28aaSamw if (ncp) { 807da6c28aaSamw *ncp = mzap_normalization_conflict(zap, 808da6c28aaSamw zn, mze); 809da6c28aaSamw } 810da6c28aaSamw } 811fa9e4066Sahrens } 812fa9e4066Sahrens } 813da6c28aaSamw zap_name_free(zn); 814fa9e4066Sahrens zap_unlockdir(zap); 815fa9e4066Sahrens return (err); 816fa9e4066Sahrens } 817fa9e4066Sahrens 818c7cd2421SGeorge Wilson int 819c7cd2421SGeorge Wilson zap_prefetch_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, 820c7cd2421SGeorge Wilson int key_numints) 821c7cd2421SGeorge Wilson { 822c7cd2421SGeorge Wilson zap_t *zap; 823c7cd2421SGeorge Wilson int err; 824c7cd2421SGeorge Wilson zap_name_t *zn; 825c7cd2421SGeorge Wilson 826c7cd2421SGeorge Wilson err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); 827c7cd2421SGeorge Wilson if (err) 828c7cd2421SGeorge Wilson return (err); 829c7cd2421SGeorge Wilson zn = zap_name_alloc_uint64(zap, key, key_numints); 830c7cd2421SGeorge Wilson if (zn == NULL) { 831c7cd2421SGeorge Wilson zap_unlockdir(zap); 832be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 833c7cd2421SGeorge Wilson } 834c7cd2421SGeorge Wilson 835c7cd2421SGeorge Wilson fzap_prefetch(zn); 836c7cd2421SGeorge Wilson zap_name_free(zn); 837c7cd2421SGeorge Wilson zap_unlockdir(zap); 838c7cd2421SGeorge Wilson return (err); 839c7cd2421SGeorge Wilson } 840c7cd2421SGeorge Wilson 841b24ab676SJeff Bonwick int 842b24ab676SJeff Bonwick zap_lookup_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, 843b24ab676SJeff Bonwick int key_numints, uint64_t integer_size, uint64_t num_integers, void *buf) 844b24ab676SJeff Bonwick { 845b24ab676SJeff Bonwick zap_t *zap; 846b24ab676SJeff Bonwick int err; 847b24ab676SJeff Bonwick zap_name_t *zn; 848b24ab676SJeff Bonwick 849b24ab676SJeff Bonwick err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); 850b24ab676SJeff Bonwick if (err) 851b24ab676SJeff Bonwick return (err); 852b24ab676SJeff Bonwick zn = zap_name_alloc_uint64(zap, key, key_numints); 853b24ab676SJeff Bonwick if (zn == NULL) { 854b24ab676SJeff Bonwick zap_unlockdir(zap); 855be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 856b24ab676SJeff Bonwick } 857b24ab676SJeff Bonwick 858b24ab676SJeff Bonwick err = fzap_lookup(zn, integer_size, num_integers, buf, 859b24ab676SJeff Bonwick NULL, 0, NULL); 860b24ab676SJeff Bonwick zap_name_free(zn); 861b24ab676SJeff Bonwick zap_unlockdir(zap); 862b24ab676SJeff Bonwick return (err); 863b24ab676SJeff Bonwick } 864b24ab676SJeff Bonwick 86592241e0bSTom Erickson int 86692241e0bSTom Erickson zap_contains(objset_t *os, uint64_t zapobj, const char *name) 86792241e0bSTom Erickson { 8682acef22dSMatthew Ahrens int err = zap_lookup_norm(os, zapobj, name, 0, 8692acef22dSMatthew Ahrens 0, NULL, MT_EXACT, NULL, 0, NULL); 87092241e0bSTom Erickson if (err == EOVERFLOW || err == EINVAL) 87192241e0bSTom Erickson err = 0; /* found, but skipped reading the value */ 87292241e0bSTom Erickson return (err); 87392241e0bSTom Erickson } 87492241e0bSTom Erickson 875fa9e4066Sahrens int 876fa9e4066Sahrens zap_length(objset_t *os, uint64_t zapobj, const char *name, 877fa9e4066Sahrens uint64_t *integer_size, uint64_t *num_integers) 878fa9e4066Sahrens { 879fa9e4066Sahrens zap_t *zap; 880fa9e4066Sahrens int err; 881fa9e4066Sahrens mzap_ent_t *mze; 882da6c28aaSamw zap_name_t *zn; 883fa9e4066Sahrens 884c5f9e431Sahrens err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); 885fa9e4066Sahrens if (err) 886fa9e4066Sahrens return (err); 887da6c28aaSamw zn = zap_name_alloc(zap, name, MT_EXACT); 888da6c28aaSamw if (zn == NULL) { 889da6c28aaSamw zap_unlockdir(zap); 890be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 891da6c28aaSamw } 892fa9e4066Sahrens if (!zap->zap_ismicro) { 893da6c28aaSamw err = fzap_length(zn, integer_size, num_integers); 894fa9e4066Sahrens } else { 895da6c28aaSamw mze = mze_find(zn); 896fa9e4066Sahrens if (mze == NULL) { 897be6fd75aSMatthew Ahrens err = SET_ERROR(ENOENT); 898fa9e4066Sahrens } else { 899fa9e4066Sahrens if (integer_size) 900fa9e4066Sahrens *integer_size = 8; 901fa9e4066Sahrens if (num_integers) 902fa9e4066Sahrens *num_integers = 1; 903fa9e4066Sahrens } 904fa9e4066Sahrens } 905da6c28aaSamw zap_name_free(zn); 906fa9e4066Sahrens zap_unlockdir(zap); 907fa9e4066Sahrens return (err); 908fa9e4066Sahrens } 909fa9e4066Sahrens 910b24ab676SJeff Bonwick int 911b24ab676SJeff Bonwick zap_length_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, 912b24ab676SJeff Bonwick int key_numints, uint64_t *integer_size, uint64_t *num_integers) 913b24ab676SJeff Bonwick { 914b24ab676SJeff Bonwick zap_t *zap; 915b24ab676SJeff Bonwick int err; 916b24ab676SJeff Bonwick zap_name_t *zn; 917b24ab676SJeff Bonwick 918b24ab676SJeff Bonwick err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); 919b24ab676SJeff Bonwick if (err) 920b24ab676SJeff Bonwick return (err); 921b24ab676SJeff Bonwick zn = zap_name_alloc_uint64(zap, key, key_numints); 922b24ab676SJeff Bonwick if (zn == NULL) { 923b24ab676SJeff Bonwick zap_unlockdir(zap); 924be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 925b24ab676SJeff Bonwick } 926b24ab676SJeff Bonwick err = fzap_length(zn, integer_size, num_integers); 927b24ab676SJeff Bonwick zap_name_free(zn); 928b24ab676SJeff Bonwick zap_unlockdir(zap); 929b24ab676SJeff Bonwick return (err); 930b24ab676SJeff Bonwick } 931b24ab676SJeff Bonwick 932fa9e4066Sahrens static void 933da6c28aaSamw mzap_addent(zap_name_t *zn, uint64_t value) 934fa9e4066Sahrens { 935fa9e4066Sahrens int i; 936da6c28aaSamw zap_t *zap = zn->zn_zap; 937fa9e4066Sahrens int start = zap->zap_m.zap_alloc_next; 938fa9e4066Sahrens uint32_t cd; 939fa9e4066Sahrens 940fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 941fa9e4066Sahrens 942fa9e4066Sahrens #ifdef ZFS_DEBUG 943fa9e4066Sahrens for (i = 0; i < zap->zap_m.zap_num_chunks; i++) { 944*c1379625SJustin T. Gibbs mzap_ent_phys_t *mze = &zap_m_phys(zap)->mz_chunk[i]; 945b24ab676SJeff Bonwick ASSERT(strcmp(zn->zn_key_orig, mze->mze_name) != 0); 946fa9e4066Sahrens } 947fa9e4066Sahrens #endif 948fa9e4066Sahrens 949da6c28aaSamw cd = mze_find_unused_cd(zap, zn->zn_hash); 950fa9e4066Sahrens /* given the limited size of the microzap, this can't happen */ 951b24ab676SJeff Bonwick ASSERT(cd < zap_maxcd(zap)); 952fa9e4066Sahrens 953fa9e4066Sahrens again: 954fa9e4066Sahrens for (i = start; i < zap->zap_m.zap_num_chunks; i++) { 955*c1379625SJustin T. Gibbs mzap_ent_phys_t *mze = &zap_m_phys(zap)->mz_chunk[i]; 956fa9e4066Sahrens if (mze->mze_name[0] == 0) { 957fa9e4066Sahrens mze->mze_value = value; 958fa9e4066Sahrens mze->mze_cd = cd; 959b24ab676SJeff Bonwick (void) strcpy(mze->mze_name, zn->zn_key_orig); 960fa9e4066Sahrens zap->zap_m.zap_num_entries++; 961fa9e4066Sahrens zap->zap_m.zap_alloc_next = i+1; 962fa9e4066Sahrens if (zap->zap_m.zap_alloc_next == 963fa9e4066Sahrens zap->zap_m.zap_num_chunks) 964fa9e4066Sahrens zap->zap_m.zap_alloc_next = 0; 9653f9d6ad7SLin Ling mze_insert(zap, i, zn->zn_hash); 966fa9e4066Sahrens return; 967fa9e4066Sahrens } 968fa9e4066Sahrens } 969fa9e4066Sahrens if (start != 0) { 970fa9e4066Sahrens start = 0; 971fa9e4066Sahrens goto again; 972fa9e4066Sahrens } 973fa9e4066Sahrens ASSERT(!"out of entries!"); 974fa9e4066Sahrens } 975fa9e4066Sahrens 976fa9e4066Sahrens int 977b24ab676SJeff Bonwick zap_add(objset_t *os, uint64_t zapobj, const char *key, 978fa9e4066Sahrens int integer_size, uint64_t num_integers, 979fa9e4066Sahrens const void *val, dmu_tx_t *tx) 980fa9e4066Sahrens { 981fa9e4066Sahrens zap_t *zap; 982fa9e4066Sahrens int err; 983fa9e4066Sahrens mzap_ent_t *mze; 984fa9e4066Sahrens const uint64_t *intval = val; 985da6c28aaSamw zap_name_t *zn; 986fa9e4066Sahrens 987c5f9e431Sahrens err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, &zap); 988fa9e4066Sahrens if (err) 989fa9e4066Sahrens return (err); 990b24ab676SJeff Bonwick zn = zap_name_alloc(zap, key, MT_EXACT); 991da6c28aaSamw if (zn == NULL) { 992da6c28aaSamw zap_unlockdir(zap); 993be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 994da6c28aaSamw } 995fa9e4066Sahrens if (!zap->zap_ismicro) { 996da6c28aaSamw err = fzap_add(zn, integer_size, num_integers, val, tx); 997ad860c82Sbonwick zap = zn->zn_zap; /* fzap_add() may change zap */ 998fa9e4066Sahrens } else if (integer_size != 8 || num_integers != 1 || 999b24ab676SJeff Bonwick strlen(key) >= MZAP_NAME_LEN) { 1000b24ab676SJeff Bonwick err = mzap_upgrade(&zn->zn_zap, tx, 0); 1001ad860c82Sbonwick if (err == 0) 1002ad860c82Sbonwick err = fzap_add(zn, integer_size, num_integers, val, tx); 1003ad860c82Sbonwick zap = zn->zn_zap; /* fzap_add() may change zap */ 1004fa9e4066Sahrens } else { 1005da6c28aaSamw mze = mze_find(zn); 1006fa9e4066Sahrens if (mze != NULL) { 1007be6fd75aSMatthew Ahrens err = SET_ERROR(EEXIST); 1008fa9e4066Sahrens } else { 1009da6c28aaSamw mzap_addent(zn, *intval); 1010fa9e4066Sahrens } 1011fa9e4066Sahrens } 1012ad860c82Sbonwick ASSERT(zap == zn->zn_zap); 1013da6c28aaSamw zap_name_free(zn); 1014ad860c82Sbonwick if (zap != NULL) /* may be NULL if fzap_add() failed */ 1015ad860c82Sbonwick zap_unlockdir(zap); 1016fa9e4066Sahrens return (err); 1017fa9e4066Sahrens } 1018fa9e4066Sahrens 1019b24ab676SJeff Bonwick int 1020b24ab676SJeff Bonwick zap_add_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, 1021b24ab676SJeff Bonwick int key_numints, int integer_size, uint64_t num_integers, 1022b24ab676SJeff Bonwick const void *val, dmu_tx_t *tx) 1023b24ab676SJeff Bonwick { 1024b24ab676SJeff Bonwick zap_t *zap; 1025b24ab676SJeff Bonwick int err; 1026b24ab676SJeff Bonwick zap_name_t *zn; 1027b24ab676SJeff Bonwick 1028b24ab676SJeff Bonwick err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, &zap); 1029b24ab676SJeff Bonwick if (err) 1030b24ab676SJeff Bonwick return (err); 1031b24ab676SJeff Bonwick zn = zap_name_alloc_uint64(zap, key, key_numints); 1032b24ab676SJeff Bonwick if (zn == NULL) { 1033b24ab676SJeff Bonwick zap_unlockdir(zap); 1034be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 1035b24ab676SJeff Bonwick } 1036b24ab676SJeff Bonwick err = fzap_add(zn, integer_size, num_integers, val, tx); 1037b24ab676SJeff Bonwick zap = zn->zn_zap; /* fzap_add() may change zap */ 1038b24ab676SJeff Bonwick zap_name_free(zn); 1039b24ab676SJeff Bonwick if (zap != NULL) /* may be NULL if fzap_add() failed */ 1040b24ab676SJeff Bonwick zap_unlockdir(zap); 1041b24ab676SJeff Bonwick return (err); 1042b24ab676SJeff Bonwick } 1043b24ab676SJeff Bonwick 1044fa9e4066Sahrens int 1045fa9e4066Sahrens zap_update(objset_t *os, uint64_t zapobj, const char *name, 1046fa9e4066Sahrens int integer_size, uint64_t num_integers, const void *val, dmu_tx_t *tx) 1047fa9e4066Sahrens { 1048fa9e4066Sahrens zap_t *zap; 1049fa9e4066Sahrens mzap_ent_t *mze; 10503f9d6ad7SLin Ling uint64_t oldval; 1051fa9e4066Sahrens const uint64_t *intval = val; 1052da6c28aaSamw zap_name_t *zn; 1053fa9e4066Sahrens int err; 1054fa9e4066Sahrens 10553f9d6ad7SLin Ling #ifdef ZFS_DEBUG 10563f9d6ad7SLin Ling /* 10573f9d6ad7SLin Ling * If there is an old value, it shouldn't change across the 10583f9d6ad7SLin Ling * lockdir (eg, due to bprewrite's xlation). 10593f9d6ad7SLin Ling */ 10603f9d6ad7SLin Ling if (integer_size == 8 && num_integers == 1) 10613f9d6ad7SLin Ling (void) zap_lookup(os, zapobj, name, 8, 1, &oldval); 10623f9d6ad7SLin Ling #endif 10633f9d6ad7SLin Ling 1064c5f9e431Sahrens err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, &zap); 1065fa9e4066Sahrens if (err) 1066fa9e4066Sahrens return (err); 1067da6c28aaSamw zn = zap_name_alloc(zap, name, MT_EXACT); 1068da6c28aaSamw if (zn == NULL) { 1069da6c28aaSamw zap_unlockdir(zap); 1070be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 1071da6c28aaSamw } 1072fa9e4066Sahrens if (!zap->zap_ismicro) { 1073da6c28aaSamw err = fzap_update(zn, integer_size, num_integers, val, tx); 1074ad860c82Sbonwick zap = zn->zn_zap; /* fzap_update() may change zap */ 1075fa9e4066Sahrens } else if (integer_size != 8 || num_integers != 1 || 1076fa9e4066Sahrens strlen(name) >= MZAP_NAME_LEN) { 1077fa9e4066Sahrens dprintf("upgrading obj %llu: intsz=%u numint=%llu name=%s\n", 1078fa9e4066Sahrens zapobj, integer_size, num_integers, name); 1079b24ab676SJeff Bonwick err = mzap_upgrade(&zn->zn_zap, tx, 0); 1080ad860c82Sbonwick if (err == 0) 1081ad860c82Sbonwick err = fzap_update(zn, integer_size, num_integers, 1082ad860c82Sbonwick val, tx); 1083ad860c82Sbonwick zap = zn->zn_zap; /* fzap_update() may change zap */ 1084fa9e4066Sahrens } else { 1085da6c28aaSamw mze = mze_find(zn); 1086fa9e4066Sahrens if (mze != NULL) { 10873f9d6ad7SLin Ling ASSERT3U(MZE_PHYS(zap, mze)->mze_value, ==, oldval); 10883f9d6ad7SLin Ling MZE_PHYS(zap, mze)->mze_value = *intval; 1089fa9e4066Sahrens } else { 1090da6c28aaSamw mzap_addent(zn, *intval); 1091fa9e4066Sahrens } 1092fa9e4066Sahrens } 1093ad860c82Sbonwick ASSERT(zap == zn->zn_zap); 1094da6c28aaSamw zap_name_free(zn); 1095ad860c82Sbonwick if (zap != NULL) /* may be NULL if fzap_upgrade() failed */ 1096ad860c82Sbonwick zap_unlockdir(zap); 1097455d5089Sahrens return (err); 1098fa9e4066Sahrens } 1099fa9e4066Sahrens 1100b24ab676SJeff Bonwick int 1101b24ab676SJeff Bonwick zap_update_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, 1102b24ab676SJeff Bonwick int key_numints, 1103b24ab676SJeff Bonwick int integer_size, uint64_t num_integers, const void *val, dmu_tx_t *tx) 1104b24ab676SJeff Bonwick { 1105b24ab676SJeff Bonwick zap_t *zap; 1106b24ab676SJeff Bonwick zap_name_t *zn; 1107b24ab676SJeff Bonwick int err; 1108b24ab676SJeff Bonwick 1109b24ab676SJeff Bonwick err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, &zap); 1110b24ab676SJeff Bonwick if (err) 1111b24ab676SJeff Bonwick return (err); 1112b24ab676SJeff Bonwick zn = zap_name_alloc_uint64(zap, key, key_numints); 1113b24ab676SJeff Bonwick if (zn == NULL) { 1114b24ab676SJeff Bonwick zap_unlockdir(zap); 1115be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 1116b24ab676SJeff Bonwick } 1117b24ab676SJeff Bonwick err = fzap_update(zn, integer_size, num_integers, val, tx); 1118b24ab676SJeff Bonwick zap = zn->zn_zap; /* fzap_update() may change zap */ 1119b24ab676SJeff Bonwick zap_name_free(zn); 1120b24ab676SJeff Bonwick if (zap != NULL) /* may be NULL if fzap_upgrade() failed */ 1121b24ab676SJeff Bonwick zap_unlockdir(zap); 1122b24ab676SJeff Bonwick return (err); 1123b24ab676SJeff Bonwick } 1124b24ab676SJeff Bonwick 1125fa9e4066Sahrens int 1126fa9e4066Sahrens zap_remove(objset_t *os, uint64_t zapobj, const char *name, dmu_tx_t *tx) 1127da6c28aaSamw { 1128da6c28aaSamw return (zap_remove_norm(os, zapobj, name, MT_EXACT, tx)); 1129da6c28aaSamw } 1130da6c28aaSamw 1131da6c28aaSamw int 1132da6c28aaSamw zap_remove_norm(objset_t *os, uint64_t zapobj, const char *name, 1133da6c28aaSamw matchtype_t mt, dmu_tx_t *tx) 1134fa9e4066Sahrens { 1135fa9e4066Sahrens zap_t *zap; 1136fa9e4066Sahrens int err; 1137fa9e4066Sahrens mzap_ent_t *mze; 1138da6c28aaSamw zap_name_t *zn; 1139fa9e4066Sahrens 1140c5f9e431Sahrens err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, FALSE, &zap); 1141fa9e4066Sahrens if (err) 1142fa9e4066Sahrens return (err); 1143da6c28aaSamw zn = zap_name_alloc(zap, name, mt); 1144da6c28aaSamw if (zn == NULL) { 1145da6c28aaSamw zap_unlockdir(zap); 1146be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 1147da6c28aaSamw } 1148fa9e4066Sahrens if (!zap->zap_ismicro) { 1149da6c28aaSamw err = fzap_remove(zn, tx); 1150fa9e4066Sahrens } else { 1151da6c28aaSamw mze = mze_find(zn); 1152fa9e4066Sahrens if (mze == NULL) { 1153be6fd75aSMatthew Ahrens err = SET_ERROR(ENOENT); 1154fa9e4066Sahrens } else { 1155fa9e4066Sahrens zap->zap_m.zap_num_entries--; 1156*c1379625SJustin T. Gibbs bzero(&zap_m_phys(zap)->mz_chunk[mze->mze_chunkid], 1157fa9e4066Sahrens sizeof (mzap_ent_phys_t)); 1158fa9e4066Sahrens mze_remove(zap, mze); 1159fa9e4066Sahrens } 1160fa9e4066Sahrens } 1161da6c28aaSamw zap_name_free(zn); 1162fa9e4066Sahrens zap_unlockdir(zap); 1163fa9e4066Sahrens return (err); 1164fa9e4066Sahrens } 1165fa9e4066Sahrens 1166b24ab676SJeff Bonwick int 1167b24ab676SJeff Bonwick zap_remove_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, 1168b24ab676SJeff Bonwick int key_numints, dmu_tx_t *tx) 1169b24ab676SJeff Bonwick { 1170b24ab676SJeff Bonwick zap_t *zap; 1171b24ab676SJeff Bonwick int err; 1172b24ab676SJeff Bonwick zap_name_t *zn; 1173b24ab676SJeff Bonwick 1174b24ab676SJeff Bonwick err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, FALSE, &zap); 1175b24ab676SJeff Bonwick if (err) 1176b24ab676SJeff Bonwick return (err); 1177b24ab676SJeff Bonwick zn = zap_name_alloc_uint64(zap, key, key_numints); 1178b24ab676SJeff Bonwick if (zn == NULL) { 1179b24ab676SJeff Bonwick zap_unlockdir(zap); 1180be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 1181b24ab676SJeff Bonwick } 1182b24ab676SJeff Bonwick err = fzap_remove(zn, tx); 1183b24ab676SJeff Bonwick zap_name_free(zn); 1184b24ab676SJeff Bonwick zap_unlockdir(zap); 1185b24ab676SJeff Bonwick return (err); 1186b24ab676SJeff Bonwick } 1187b24ab676SJeff Bonwick 1188fa9e4066Sahrens /* 1189fa9e4066Sahrens * Routines for iterating over the attributes. 1190fa9e4066Sahrens */ 1191fa9e4066Sahrens 1192fa9e4066Sahrens void 1193fa9e4066Sahrens zap_cursor_init_serialized(zap_cursor_t *zc, objset_t *os, uint64_t zapobj, 1194fa9e4066Sahrens uint64_t serialized) 1195fa9e4066Sahrens { 1196fa9e4066Sahrens zc->zc_objset = os; 119787e5029aSahrens zc->zc_zap = NULL; 119887e5029aSahrens zc->zc_leaf = NULL; 1199fa9e4066Sahrens zc->zc_zapobj = zapobj; 1200b24ab676SJeff Bonwick zc->zc_serialized = serialized; 1201b24ab676SJeff Bonwick zc->zc_hash = 0; 1202b24ab676SJeff Bonwick zc->zc_cd = 0; 1203fa9e4066Sahrens } 1204fa9e4066Sahrens 120587e5029aSahrens void 120687e5029aSahrens zap_cursor_init(zap_cursor_t *zc, objset_t *os, uint64_t zapobj) 120787e5029aSahrens { 120887e5029aSahrens zap_cursor_init_serialized(zc, os, zapobj, 0); 120987e5029aSahrens } 121087e5029aSahrens 121187e5029aSahrens void 121287e5029aSahrens zap_cursor_fini(zap_cursor_t *zc) 121387e5029aSahrens { 121487e5029aSahrens if (zc->zc_zap) { 121587e5029aSahrens rw_enter(&zc->zc_zap->zap_rwlock, RW_READER); 121687e5029aSahrens zap_unlockdir(zc->zc_zap); 121787e5029aSahrens zc->zc_zap = NULL; 121887e5029aSahrens } 121987e5029aSahrens if (zc->zc_leaf) { 122087e5029aSahrens rw_enter(&zc->zc_leaf->l_rwlock, RW_READER); 122187e5029aSahrens zap_put_leaf(zc->zc_leaf); 122287e5029aSahrens zc->zc_leaf = NULL; 122387e5029aSahrens } 122487e5029aSahrens zc->zc_objset = NULL; 122587e5029aSahrens } 122687e5029aSahrens 1227fa9e4066Sahrens uint64_t 1228fa9e4066Sahrens zap_cursor_serialize(zap_cursor_t *zc) 1229fa9e4066Sahrens { 1230fa9e4066Sahrens if (zc->zc_hash == -1ULL) 1231fa9e4066Sahrens return (-1ULL); 1232b24ab676SJeff Bonwick if (zc->zc_zap == NULL) 1233b24ab676SJeff Bonwick return (zc->zc_serialized); 1234b24ab676SJeff Bonwick ASSERT((zc->zc_hash & zap_maxcd(zc->zc_zap)) == 0); 1235b24ab676SJeff Bonwick ASSERT(zc->zc_cd < zap_maxcd(zc->zc_zap)); 1236b24ab676SJeff Bonwick 1237b24ab676SJeff Bonwick /* 1238b24ab676SJeff Bonwick * We want to keep the high 32 bits of the cursor zero if we can, so 1239b24ab676SJeff Bonwick * that 32-bit programs can access this. So usually use a small 1240b24ab676SJeff Bonwick * (28-bit) hash value so we can fit 4 bits of cd into the low 32-bits 1241b24ab676SJeff Bonwick * of the cursor. 1242b24ab676SJeff Bonwick * 1243b24ab676SJeff Bonwick * [ collision differentiator | zap_hashbits()-bit hash value ] 1244b24ab676SJeff Bonwick */ 1245b24ab676SJeff Bonwick return ((zc->zc_hash >> (64 - zap_hashbits(zc->zc_zap))) | 1246b24ab676SJeff Bonwick ((uint64_t)zc->zc_cd << zap_hashbits(zc->zc_zap))); 1247fa9e4066Sahrens } 1248fa9e4066Sahrens 1249fa9e4066Sahrens int 1250fa9e4066Sahrens zap_cursor_retrieve(zap_cursor_t *zc, zap_attribute_t *za) 1251fa9e4066Sahrens { 1252fa9e4066Sahrens int err; 1253fa9e4066Sahrens avl_index_t idx; 1254fa9e4066Sahrens mzap_ent_t mze_tofind; 1255fa9e4066Sahrens mzap_ent_t *mze; 1256fa9e4066Sahrens 1257fa9e4066Sahrens if (zc->zc_hash == -1ULL) 1258be6fd75aSMatthew Ahrens return (SET_ERROR(ENOENT)); 1259fa9e4066Sahrens 126087e5029aSahrens if (zc->zc_zap == NULL) { 1261b24ab676SJeff Bonwick int hb; 126287e5029aSahrens err = zap_lockdir(zc->zc_objset, zc->zc_zapobj, NULL, 1263c5f9e431Sahrens RW_READER, TRUE, FALSE, &zc->zc_zap); 126487e5029aSahrens if (err) 126587e5029aSahrens return (err); 1266b24ab676SJeff Bonwick 1267b24ab676SJeff Bonwick /* 1268b24ab676SJeff Bonwick * To support zap_cursor_init_serialized, advance, retrieve, 1269b24ab676SJeff Bonwick * we must add to the existing zc_cd, which may already 1270b24ab676SJeff Bonwick * be 1 due to the zap_cursor_advance. 1271b24ab676SJeff Bonwick */ 1272b24ab676SJeff Bonwick ASSERT(zc->zc_hash == 0); 1273b24ab676SJeff Bonwick hb = zap_hashbits(zc->zc_zap); 1274b24ab676SJeff Bonwick zc->zc_hash = zc->zc_serialized << (64 - hb); 1275b24ab676SJeff Bonwick zc->zc_cd += zc->zc_serialized >> hb; 1276b24ab676SJeff Bonwick if (zc->zc_cd >= zap_maxcd(zc->zc_zap)) /* corrupt serialized */ 1277b24ab676SJeff Bonwick zc->zc_cd = 0; 127887e5029aSahrens } else { 127987e5029aSahrens rw_enter(&zc->zc_zap->zap_rwlock, RW_READER); 128087e5029aSahrens } 128187e5029aSahrens if (!zc->zc_zap->zap_ismicro) { 128287e5029aSahrens err = fzap_cursor_retrieve(zc->zc_zap, zc, za); 1283fa9e4066Sahrens } else { 1284fa9e4066Sahrens mze_tofind.mze_hash = zc->zc_hash; 12853f9d6ad7SLin Ling mze_tofind.mze_cd = zc->zc_cd; 1286fa9e4066Sahrens 128787e5029aSahrens mze = avl_find(&zc->zc_zap->zap_m.zap_avl, &mze_tofind, &idx); 128887e5029aSahrens if (mze == NULL) { 128987e5029aSahrens mze = avl_nearest(&zc->zc_zap->zap_m.zap_avl, 129087e5029aSahrens idx, AVL_AFTER); 129187e5029aSahrens } 1292fa9e4066Sahrens if (mze) { 12933f9d6ad7SLin Ling mzap_ent_phys_t *mzep = MZE_PHYS(zc->zc_zap, mze); 12943f9d6ad7SLin Ling ASSERT3U(mze->mze_cd, ==, mzep->mze_cd); 1295da6c28aaSamw za->za_normalization_conflict = 1296da6c28aaSamw mzap_normalization_conflict(zc->zc_zap, NULL, mze); 1297fa9e4066Sahrens za->za_integer_length = 8; 1298fa9e4066Sahrens za->za_num_integers = 1; 12993f9d6ad7SLin Ling za->za_first_integer = mzep->mze_value; 13003f9d6ad7SLin Ling (void) strcpy(za->za_name, mzep->mze_name); 1301fa9e4066Sahrens zc->zc_hash = mze->mze_hash; 13023f9d6ad7SLin Ling zc->zc_cd = mze->mze_cd; 1303fa9e4066Sahrens err = 0; 1304fa9e4066Sahrens } else { 1305fa9e4066Sahrens zc->zc_hash = -1ULL; 1306be6fd75aSMatthew Ahrens err = SET_ERROR(ENOENT); 1307fa9e4066Sahrens } 1308fa9e4066Sahrens } 130987e5029aSahrens rw_exit(&zc->zc_zap->zap_rwlock); 1310fa9e4066Sahrens return (err); 1311fa9e4066Sahrens } 1312fa9e4066Sahrens 1313fa9e4066Sahrens void 1314fa9e4066Sahrens zap_cursor_advance(zap_cursor_t *zc) 1315fa9e4066Sahrens { 1316fa9e4066Sahrens if (zc->zc_hash == -1ULL) 1317fa9e4066Sahrens return; 1318fa9e4066Sahrens zc->zc_cd++; 1319fa9e4066Sahrens } 1320fa9e4066Sahrens 1321fa9e4066Sahrens int 1322fa9e4066Sahrens zap_get_stats(objset_t *os, uint64_t zapobj, zap_stats_t *zs) 1323fa9e4066Sahrens { 1324fa9e4066Sahrens int err; 1325fa9e4066Sahrens zap_t *zap; 1326fa9e4066Sahrens 1327c5f9e431Sahrens err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); 1328fa9e4066Sahrens if (err) 1329fa9e4066Sahrens return (err); 1330fa9e4066Sahrens 1331fa9e4066Sahrens bzero(zs, sizeof (zap_stats_t)); 1332fa9e4066Sahrens 1333fa9e4066Sahrens if (zap->zap_ismicro) { 1334fa9e4066Sahrens zs->zs_blocksize = zap->zap_dbuf->db_size; 1335fa9e4066Sahrens zs->zs_num_entries = zap->zap_m.zap_num_entries; 1336fa9e4066Sahrens zs->zs_num_blocks = 1; 1337fa9e4066Sahrens } else { 1338fa9e4066Sahrens fzap_get_stats(zap, zs); 1339fa9e4066Sahrens } 1340fa9e4066Sahrens zap_unlockdir(zap); 1341fa9e4066Sahrens return (0); 1342fa9e4066Sahrens } 13433d692628SSanjeev Bagewadi 13443d692628SSanjeev Bagewadi int 13453d692628SSanjeev Bagewadi zap_count_write(objset_t *os, uint64_t zapobj, const char *name, int add, 1346720d1aa1SSanjeev Bagewadi uint64_t *towrite, uint64_t *tooverwrite) 13473d692628SSanjeev Bagewadi { 13483d692628SSanjeev Bagewadi zap_t *zap; 13493d692628SSanjeev Bagewadi int err = 0; 13503d692628SSanjeev Bagewadi 13513d692628SSanjeev Bagewadi /* 13523d692628SSanjeev Bagewadi * Since, we don't have a name, we cannot figure out which blocks will 13533d692628SSanjeev Bagewadi * be affected in this operation. So, account for the worst case : 13543d692628SSanjeev Bagewadi * - 3 blocks overwritten: target leaf, ptrtbl block, header block 13553d692628SSanjeev Bagewadi * - 4 new blocks written if adding: 13563d692628SSanjeev Bagewadi * - 2 blocks for possibly split leaves, 13573d692628SSanjeev Bagewadi * - 2 grown ptrtbl blocks 13583d692628SSanjeev Bagewadi * 13593d692628SSanjeev Bagewadi * This also accomodates the case where an add operation to a fairly 13603d692628SSanjeev Bagewadi * large microzap results in a promotion to fatzap. 13613d692628SSanjeev Bagewadi */ 13623d692628SSanjeev Bagewadi if (name == NULL) { 1363b5152584SMatthew Ahrens *towrite += (3 + (add ? 4 : 0)) * SPA_OLD_MAXBLOCKSIZE; 13643d692628SSanjeev Bagewadi return (err); 13653d692628SSanjeev Bagewadi } 13663d692628SSanjeev Bagewadi 13673d692628SSanjeev Bagewadi /* 136819b94df9SMatthew Ahrens * We lock the zap with adding == FALSE. Because, if we pass 13693d692628SSanjeev Bagewadi * the actual value of add, it could trigger a mzap_upgrade(). 13703d692628SSanjeev Bagewadi * At present we are just evaluating the possibility of this operation 13713d692628SSanjeev Bagewadi * and hence we donot want to trigger an upgrade. 13723d692628SSanjeev Bagewadi */ 13733d692628SSanjeev Bagewadi err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); 13743d692628SSanjeev Bagewadi if (err) 13753d692628SSanjeev Bagewadi return (err); 13763d692628SSanjeev Bagewadi 13773d692628SSanjeev Bagewadi if (!zap->zap_ismicro) { 13783d692628SSanjeev Bagewadi zap_name_t *zn = zap_name_alloc(zap, name, MT_EXACT); 13793d692628SSanjeev Bagewadi if (zn) { 13803d692628SSanjeev Bagewadi err = fzap_count_write(zn, add, towrite, 13813d692628SSanjeev Bagewadi tooverwrite); 13823d692628SSanjeev Bagewadi zap_name_free(zn); 13833d692628SSanjeev Bagewadi } else { 13843d692628SSanjeev Bagewadi /* 13853d692628SSanjeev Bagewadi * We treat this case as similar to (name == NULL) 13863d692628SSanjeev Bagewadi */ 1387b5152584SMatthew Ahrens *towrite += (3 + (add ? 4 : 0)) * SPA_OLD_MAXBLOCKSIZE; 13883d692628SSanjeev Bagewadi } 13893d692628SSanjeev Bagewadi } else { 1390720d1aa1SSanjeev Bagewadi /* 1391720d1aa1SSanjeev Bagewadi * We are here if (name != NULL) and this is a micro-zap. 1392720d1aa1SSanjeev Bagewadi * We account for the header block depending on whether it 1393720d1aa1SSanjeev Bagewadi * is freeable. 1394720d1aa1SSanjeev Bagewadi * 1395720d1aa1SSanjeev Bagewadi * Incase of an add-operation it is hard to find out 1396720d1aa1SSanjeev Bagewadi * if this add will promote this microzap to fatzap. 1397720d1aa1SSanjeev Bagewadi * Hence, we consider the worst case and account for the 1398720d1aa1SSanjeev Bagewadi * blocks assuming this microzap would be promoted to a 1399720d1aa1SSanjeev Bagewadi * fatzap. 1400720d1aa1SSanjeev Bagewadi * 1401720d1aa1SSanjeev Bagewadi * 1 block overwritten : header block 1402720d1aa1SSanjeev Bagewadi * 4 new blocks written : 2 new split leaf, 2 grown 1403720d1aa1SSanjeev Bagewadi * ptrtbl blocks 1404720d1aa1SSanjeev Bagewadi */ 1405720d1aa1SSanjeev Bagewadi if (dmu_buf_freeable(zap->zap_dbuf)) 1406b5152584SMatthew Ahrens *tooverwrite += MZAP_MAX_BLKSZ; 1407720d1aa1SSanjeev Bagewadi else 1408b5152584SMatthew Ahrens *towrite += MZAP_MAX_BLKSZ; 1409720d1aa1SSanjeev Bagewadi 1410720d1aa1SSanjeev Bagewadi if (add) { 1411b5152584SMatthew Ahrens *towrite += 4 * MZAP_MAX_BLKSZ; 14123d692628SSanjeev Bagewadi } 14133d692628SSanjeev Bagewadi } 14143d692628SSanjeev Bagewadi 14153d692628SSanjeev Bagewadi zap_unlockdir(zap); 14163d692628SSanjeev Bagewadi return (err); 14173d692628SSanjeev Bagewadi } 1418