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. 24bc9014e6SJustin Gibbs * Copyright (c) 2014 Spectra Logic Corporation, All rights reserved. 25fa9e4066Sahrens */ 26fa9e4066Sahrens 27b24ab676SJeff Bonwick #include <sys/zio.h> 28fa9e4066Sahrens #include <sys/spa.h> 29fa9e4066Sahrens #include <sys/dmu.h> 30fa9e4066Sahrens #include <sys/zfs_context.h> 31fa9e4066Sahrens #include <sys/zap.h> 32ea8dc4b6Seschrock #include <sys/refcount.h> 33fa9e4066Sahrens #include <sys/zap_impl.h> 3487e5029aSahrens #include <sys/zap_leaf.h> 35fa9e4066Sahrens #include <sys/avl.h> 363f9d6ad7SLin Ling #include <sys/arc.h> 37b5152584SMatthew Ahrens #include <sys/dmu_objset.h> 38de8267e0Stimh 39de8267e0Stimh #ifdef _KERNEL 40de8267e0Stimh #include <sys/sunddi.h> 41de8267e0Stimh #endif 42fa9e4066Sahrens 43c1379625SJustin T. Gibbs extern inline mzap_phys_t *zap_m_phys(zap_t *zap); 44c1379625SJustin T. Gibbs 45b24ab676SJeff Bonwick static int mzap_upgrade(zap_t **zapp, dmu_tx_t *tx, zap_flags_t flags); 46fa9e4066Sahrens 47b24ab676SJeff Bonwick uint64_t 48b24ab676SJeff Bonwick zap_getflags(zap_t *zap) 49b24ab676SJeff Bonwick { 50b24ab676SJeff Bonwick if (zap->zap_ismicro) 51b24ab676SJeff Bonwick return (0); 52c1379625SJustin T. Gibbs return (zap_f_phys(zap)->zap_flags); 53b24ab676SJeff Bonwick } 54b24ab676SJeff Bonwick 55b24ab676SJeff Bonwick int 56b24ab676SJeff Bonwick zap_hashbits(zap_t *zap) 57b24ab676SJeff Bonwick { 58b24ab676SJeff Bonwick if (zap_getflags(zap) & ZAP_FLAG_HASH64) 59b24ab676SJeff Bonwick return (48); 60b24ab676SJeff Bonwick else 61b24ab676SJeff Bonwick return (28); 62b24ab676SJeff Bonwick } 63b24ab676SJeff Bonwick 64b24ab676SJeff Bonwick uint32_t 65b24ab676SJeff Bonwick zap_maxcd(zap_t *zap) 66b24ab676SJeff Bonwick { 67b24ab676SJeff Bonwick if (zap_getflags(zap) & ZAP_FLAG_HASH64) 68b24ab676SJeff Bonwick return ((1<<16)-1); 69b24ab676SJeff Bonwick else 70b24ab676SJeff Bonwick return (-1U); 71b24ab676SJeff Bonwick } 72fa9e4066Sahrens 73da6c28aaSamw static uint64_t 74b24ab676SJeff Bonwick zap_hash(zap_name_t *zn) 75da6c28aaSamw { 76b24ab676SJeff Bonwick zap_t *zap = zn->zn_zap; 77b24ab676SJeff Bonwick uint64_t h = 0; 78da6c28aaSamw 79b24ab676SJeff Bonwick if (zap_getflags(zap) & ZAP_FLAG_PRE_HASHED_KEY) { 80b24ab676SJeff Bonwick ASSERT(zap_getflags(zap) & ZAP_FLAG_UINT64_KEY); 81b24ab676SJeff Bonwick h = *(uint64_t *)zn->zn_key_orig; 82b24ab676SJeff Bonwick } else { 83b24ab676SJeff Bonwick h = zap->zap_salt; 84b24ab676SJeff Bonwick ASSERT(h != 0); 85b24ab676SJeff Bonwick ASSERT(zfs_crc64_table[128] == ZFS_CRC64_POLY); 86b24ab676SJeff Bonwick 87486ae710SMatthew Ahrens if (zap_getflags(zap) & ZAP_FLAG_UINT64_KEY) { 88486ae710SMatthew Ahrens int i; 89486ae710SMatthew Ahrens const uint64_t *wp = zn->zn_key_norm; 90486ae710SMatthew Ahrens 91486ae710SMatthew Ahrens ASSERT(zn->zn_key_intlen == 8); 92486ae710SMatthew Ahrens for (i = 0; i < zn->zn_key_norm_numints; wp++, i++) { 93486ae710SMatthew Ahrens int j; 94486ae710SMatthew Ahrens uint64_t word = *wp; 95486ae710SMatthew Ahrens 96486ae710SMatthew Ahrens for (j = 0; j < zn->zn_key_intlen; j++) { 97486ae710SMatthew Ahrens h = (h >> 8) ^ 98486ae710SMatthew Ahrens zfs_crc64_table[(h ^ word) & 0xFF]; 99486ae710SMatthew Ahrens word >>= NBBY; 100486ae710SMatthew Ahrens } 101486ae710SMatthew Ahrens } 102486ae710SMatthew Ahrens } else { 103486ae710SMatthew Ahrens int i, len; 104486ae710SMatthew Ahrens const uint8_t *cp = zn->zn_key_norm; 105486ae710SMatthew Ahrens 106486ae710SMatthew Ahrens /* 107486ae710SMatthew Ahrens * We previously stored the terminating null on 108486ae710SMatthew Ahrens * disk, but didn't hash it, so we need to 109486ae710SMatthew Ahrens * continue to not hash it. (The 110486ae710SMatthew Ahrens * zn_key_*_numints includes the terminating 111486ae710SMatthew Ahrens * null for non-binary keys.) 112486ae710SMatthew Ahrens */ 113486ae710SMatthew Ahrens len = zn->zn_key_norm_numints - 1; 114486ae710SMatthew Ahrens 115486ae710SMatthew Ahrens ASSERT(zn->zn_key_intlen == 1); 116486ae710SMatthew Ahrens for (i = 0; i < len; cp++, i++) { 117486ae710SMatthew Ahrens h = (h >> 8) ^ 118486ae710SMatthew Ahrens zfs_crc64_table[(h ^ *cp) & 0xFF]; 119486ae710SMatthew Ahrens } 120486ae710SMatthew Ahrens } 121b24ab676SJeff Bonwick } 122da6c28aaSamw /* 123b24ab676SJeff Bonwick * Don't use all 64 bits, since we need some in the cookie for 124b24ab676SJeff Bonwick * the collision differentiator. We MUST use the high bits, 125b24ab676SJeff Bonwick * since those are the ones that we first pay attention to when 126da6c28aaSamw * chosing the bucket. 127da6c28aaSamw */ 128b24ab676SJeff Bonwick h &= ~((1ULL << (64 - zap_hashbits(zap))) - 1); 129da6c28aaSamw 130b24ab676SJeff Bonwick return (h); 131da6c28aaSamw } 132da6c28aaSamw 133da6c28aaSamw static int 134da6c28aaSamw zap_normalize(zap_t *zap, const char *name, char *namenorm) 135da6c28aaSamw { 136da6c28aaSamw size_t inlen, outlen; 137da6c28aaSamw int err; 138da6c28aaSamw 139b24ab676SJeff Bonwick ASSERT(!(zap_getflags(zap) & ZAP_FLAG_UINT64_KEY)); 140b24ab676SJeff Bonwick 141da6c28aaSamw inlen = strlen(name) + 1; 142da6c28aaSamw outlen = ZAP_MAXNAMELEN; 143da6c28aaSamw 144da6c28aaSamw err = 0; 145da6c28aaSamw (void) u8_textprep_str((char *)name, &inlen, namenorm, &outlen, 146d05ba1e6STim Haley zap->zap_normflags | U8_TEXTPREP_IGNORE_NULL | 147d05ba1e6STim Haley U8_TEXTPREP_IGNORE_INVALID, U8_UNICODE_LATEST, &err); 148da6c28aaSamw 149da6c28aaSamw return (err); 150da6c28aaSamw } 151da6c28aaSamw 152da6c28aaSamw boolean_t 153da6c28aaSamw zap_match(zap_name_t *zn, const char *matchname) 154da6c28aaSamw { 155b24ab676SJeff Bonwick ASSERT(!(zap_getflags(zn->zn_zap) & ZAP_FLAG_UINT64_KEY)); 156b24ab676SJeff Bonwick 157da6c28aaSamw if (zn->zn_matchtype == MT_FIRST) { 158da6c28aaSamw char norm[ZAP_MAXNAMELEN]; 159da6c28aaSamw 160da6c28aaSamw if (zap_normalize(zn->zn_zap, matchname, norm) != 0) 161da6c28aaSamw return (B_FALSE); 162da6c28aaSamw 163b24ab676SJeff Bonwick return (strcmp(zn->zn_key_norm, norm) == 0); 164da6c28aaSamw } else { 165da6c28aaSamw /* MT_BEST or MT_EXACT */ 166b24ab676SJeff Bonwick return (strcmp(zn->zn_key_orig, matchname) == 0); 167da6c28aaSamw } 168da6c28aaSamw } 169da6c28aaSamw 170da6c28aaSamw void 171da6c28aaSamw zap_name_free(zap_name_t *zn) 172da6c28aaSamw { 173da6c28aaSamw kmem_free(zn, sizeof (zap_name_t)); 174da6c28aaSamw } 175da6c28aaSamw 176da6c28aaSamw zap_name_t * 177b24ab676SJeff Bonwick zap_name_alloc(zap_t *zap, const char *key, matchtype_t mt) 178da6c28aaSamw { 179da6c28aaSamw zap_name_t *zn = kmem_alloc(sizeof (zap_name_t), KM_SLEEP); 180da6c28aaSamw 181da6c28aaSamw zn->zn_zap = zap; 182b24ab676SJeff Bonwick zn->zn_key_intlen = sizeof (*key); 183b24ab676SJeff Bonwick zn->zn_key_orig = key; 184486ae710SMatthew Ahrens zn->zn_key_orig_numints = strlen(zn->zn_key_orig) + 1; 185da6c28aaSamw zn->zn_matchtype = mt; 186da6c28aaSamw if (zap->zap_normflags) { 187b24ab676SJeff Bonwick if (zap_normalize(zap, key, zn->zn_normbuf) != 0) { 188da6c28aaSamw zap_name_free(zn); 189da6c28aaSamw return (NULL); 190da6c28aaSamw } 191b24ab676SJeff Bonwick zn->zn_key_norm = zn->zn_normbuf; 192486ae710SMatthew Ahrens zn->zn_key_norm_numints = strlen(zn->zn_key_norm) + 1; 193da6c28aaSamw } else { 194da6c28aaSamw if (mt != MT_EXACT) { 195da6c28aaSamw zap_name_free(zn); 196da6c28aaSamw return (NULL); 197da6c28aaSamw } 198b24ab676SJeff Bonwick zn->zn_key_norm = zn->zn_key_orig; 199486ae710SMatthew Ahrens zn->zn_key_norm_numints = zn->zn_key_orig_numints; 200da6c28aaSamw } 201da6c28aaSamw 202b24ab676SJeff Bonwick zn->zn_hash = zap_hash(zn); 203b24ab676SJeff Bonwick return (zn); 204b24ab676SJeff Bonwick } 205b24ab676SJeff Bonwick 206b24ab676SJeff Bonwick zap_name_t * 207b24ab676SJeff Bonwick zap_name_alloc_uint64(zap_t *zap, const uint64_t *key, int numints) 208b24ab676SJeff Bonwick { 209b24ab676SJeff Bonwick zap_name_t *zn = kmem_alloc(sizeof (zap_name_t), KM_SLEEP); 210b24ab676SJeff Bonwick 211b24ab676SJeff Bonwick ASSERT(zap->zap_normflags == 0); 212b24ab676SJeff Bonwick zn->zn_zap = zap; 213b24ab676SJeff Bonwick zn->zn_key_intlen = sizeof (*key); 214b24ab676SJeff Bonwick zn->zn_key_orig = zn->zn_key_norm = key; 215486ae710SMatthew Ahrens zn->zn_key_orig_numints = zn->zn_key_norm_numints = numints; 216b24ab676SJeff Bonwick zn->zn_matchtype = MT_EXACT; 217b24ab676SJeff Bonwick 218b24ab676SJeff Bonwick zn->zn_hash = zap_hash(zn); 219da6c28aaSamw return (zn); 220da6c28aaSamw } 221da6c28aaSamw 222fa9e4066Sahrens static void 223fa9e4066Sahrens mzap_byteswap(mzap_phys_t *buf, size_t size) 224fa9e4066Sahrens { 225fa9e4066Sahrens int i, max; 226fa9e4066Sahrens buf->mz_block_type = BSWAP_64(buf->mz_block_type); 227fa9e4066Sahrens buf->mz_salt = BSWAP_64(buf->mz_salt); 228ab04eb8eStimh buf->mz_normflags = BSWAP_64(buf->mz_normflags); 229fa9e4066Sahrens max = (size / MZAP_ENT_LEN) - 1; 230fa9e4066Sahrens for (i = 0; i < max; i++) { 231fa9e4066Sahrens buf->mz_chunk[i].mze_value = 232fa9e4066Sahrens BSWAP_64(buf->mz_chunk[i].mze_value); 233fa9e4066Sahrens buf->mz_chunk[i].mze_cd = 234fa9e4066Sahrens BSWAP_32(buf->mz_chunk[i].mze_cd); 235fa9e4066Sahrens } 236fa9e4066Sahrens } 237fa9e4066Sahrens 238fa9e4066Sahrens void 239fa9e4066Sahrens zap_byteswap(void *buf, size_t size) 240fa9e4066Sahrens { 241fa9e4066Sahrens uint64_t block_type; 242fa9e4066Sahrens 243fa9e4066Sahrens block_type = *(uint64_t *)buf; 244fa9e4066Sahrens 2455ad82045Snd if (block_type == ZBT_MICRO || block_type == BSWAP_64(ZBT_MICRO)) { 246fa9e4066Sahrens /* ASSERT(magic == ZAP_LEAF_MAGIC); */ 247fa9e4066Sahrens mzap_byteswap(buf, size); 2485ad82045Snd } else { 249fa9e4066Sahrens fzap_byteswap(buf, size); 250fa9e4066Sahrens } 251fa9e4066Sahrens } 252fa9e4066Sahrens 253fa9e4066Sahrens static int 254fa9e4066Sahrens mze_compare(const void *arg1, const void *arg2) 255fa9e4066Sahrens { 256fa9e4066Sahrens const mzap_ent_t *mze1 = arg1; 257fa9e4066Sahrens const mzap_ent_t *mze2 = arg2; 258fa9e4066Sahrens 259fa9e4066Sahrens if (mze1->mze_hash > mze2->mze_hash) 260fa9e4066Sahrens return (+1); 261fa9e4066Sahrens if (mze1->mze_hash < mze2->mze_hash) 262fa9e4066Sahrens return (-1); 2633f9d6ad7SLin Ling if (mze1->mze_cd > mze2->mze_cd) 264fa9e4066Sahrens return (+1); 2653f9d6ad7SLin Ling if (mze1->mze_cd < mze2->mze_cd) 266fa9e4066Sahrens return (-1); 267fa9e4066Sahrens return (0); 268fa9e4066Sahrens } 269fa9e4066Sahrens 270fa9e4066Sahrens static void 2713f9d6ad7SLin Ling mze_insert(zap_t *zap, int chunkid, uint64_t hash) 272fa9e4066Sahrens { 273fa9e4066Sahrens mzap_ent_t *mze; 274fa9e4066Sahrens 275fa9e4066Sahrens ASSERT(zap->zap_ismicro); 276fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 277fa9e4066Sahrens 278fa9e4066Sahrens mze = kmem_alloc(sizeof (mzap_ent_t), KM_SLEEP); 279fa9e4066Sahrens mze->mze_chunkid = chunkid; 280fa9e4066Sahrens mze->mze_hash = hash; 2813f9d6ad7SLin Ling mze->mze_cd = MZE_PHYS(zap, mze)->mze_cd; 2823f9d6ad7SLin Ling ASSERT(MZE_PHYS(zap, mze)->mze_name[0] != 0); 283fa9e4066Sahrens avl_add(&zap->zap_m.zap_avl, mze); 284fa9e4066Sahrens } 285fa9e4066Sahrens 286fa9e4066Sahrens static mzap_ent_t * 287da6c28aaSamw mze_find(zap_name_t *zn) 288fa9e4066Sahrens { 289fa9e4066Sahrens mzap_ent_t mze_tofind; 290fa9e4066Sahrens mzap_ent_t *mze; 291fa9e4066Sahrens avl_index_t idx; 292da6c28aaSamw avl_tree_t *avl = &zn->zn_zap->zap_m.zap_avl; 293fa9e4066Sahrens 294da6c28aaSamw ASSERT(zn->zn_zap->zap_ismicro); 295da6c28aaSamw ASSERT(RW_LOCK_HELD(&zn->zn_zap->zap_rwlock)); 296fa9e4066Sahrens 297da6c28aaSamw mze_tofind.mze_hash = zn->zn_hash; 2983f9d6ad7SLin Ling mze_tofind.mze_cd = 0; 299fa9e4066Sahrens 300da6c28aaSamw again: 301fa9e4066Sahrens mze = avl_find(avl, &mze_tofind, &idx); 302fa9e4066Sahrens if (mze == NULL) 303fa9e4066Sahrens mze = avl_nearest(avl, idx, AVL_AFTER); 304da6c28aaSamw for (; mze && mze->mze_hash == zn->zn_hash; mze = AVL_NEXT(avl, mze)) { 3053f9d6ad7SLin Ling ASSERT3U(mze->mze_cd, ==, MZE_PHYS(zn->zn_zap, mze)->mze_cd); 3063f9d6ad7SLin Ling if (zap_match(zn, MZE_PHYS(zn->zn_zap, mze)->mze_name)) 307fa9e4066Sahrens return (mze); 308fa9e4066Sahrens } 309da6c28aaSamw if (zn->zn_matchtype == MT_BEST) { 310da6c28aaSamw zn->zn_matchtype = MT_FIRST; 311da6c28aaSamw goto again; 312da6c28aaSamw } 313fa9e4066Sahrens return (NULL); 314fa9e4066Sahrens } 315fa9e4066Sahrens 316fa9e4066Sahrens static uint32_t 317fa9e4066Sahrens mze_find_unused_cd(zap_t *zap, uint64_t hash) 318fa9e4066Sahrens { 319fa9e4066Sahrens mzap_ent_t mze_tofind; 320fa9e4066Sahrens mzap_ent_t *mze; 321fa9e4066Sahrens avl_index_t idx; 322fa9e4066Sahrens avl_tree_t *avl = &zap->zap_m.zap_avl; 323fa9e4066Sahrens uint32_t cd; 324fa9e4066Sahrens 325fa9e4066Sahrens ASSERT(zap->zap_ismicro); 326fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 327fa9e4066Sahrens 328fa9e4066Sahrens mze_tofind.mze_hash = hash; 3293f9d6ad7SLin Ling mze_tofind.mze_cd = 0; 330fa9e4066Sahrens 331fa9e4066Sahrens cd = 0; 332fa9e4066Sahrens for (mze = avl_find(avl, &mze_tofind, &idx); 333fa9e4066Sahrens mze && mze->mze_hash == hash; mze = AVL_NEXT(avl, mze)) { 3343f9d6ad7SLin Ling if (mze->mze_cd != cd) 335fa9e4066Sahrens break; 336fa9e4066Sahrens cd++; 337fa9e4066Sahrens } 338fa9e4066Sahrens 339fa9e4066Sahrens return (cd); 340fa9e4066Sahrens } 341fa9e4066Sahrens 342fa9e4066Sahrens static void 343fa9e4066Sahrens mze_remove(zap_t *zap, mzap_ent_t *mze) 344fa9e4066Sahrens { 345fa9e4066Sahrens ASSERT(zap->zap_ismicro); 346fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 347fa9e4066Sahrens 348fa9e4066Sahrens avl_remove(&zap->zap_m.zap_avl, mze); 349fa9e4066Sahrens kmem_free(mze, sizeof (mzap_ent_t)); 350fa9e4066Sahrens } 351fa9e4066Sahrens 352fa9e4066Sahrens static void 353fa9e4066Sahrens mze_destroy(zap_t *zap) 354fa9e4066Sahrens { 355fa9e4066Sahrens mzap_ent_t *mze; 356fa9e4066Sahrens void *avlcookie = NULL; 357fa9e4066Sahrens 358fa9e4066Sahrens while (mze = avl_destroy_nodes(&zap->zap_m.zap_avl, &avlcookie)) 359fa9e4066Sahrens kmem_free(mze, sizeof (mzap_ent_t)); 360fa9e4066Sahrens avl_destroy(&zap->zap_m.zap_avl); 361fa9e4066Sahrens } 362fa9e4066Sahrens 363fa9e4066Sahrens static zap_t * 364fa9e4066Sahrens mzap_open(objset_t *os, uint64_t obj, dmu_buf_t *db) 365fa9e4066Sahrens { 366fa9e4066Sahrens zap_t *winner; 367fa9e4066Sahrens zap_t *zap; 368fa9e4066Sahrens int i; 369fa9e4066Sahrens 370fa9e4066Sahrens ASSERT3U(MZAP_ENT_LEN, ==, sizeof (mzap_ent_phys_t)); 371fa9e4066Sahrens 372fa9e4066Sahrens zap = kmem_zalloc(sizeof (zap_t), KM_SLEEP); 373fa9e4066Sahrens rw_init(&zap->zap_rwlock, 0, 0, 0); 374fa9e4066Sahrens rw_enter(&zap->zap_rwlock, RW_WRITER); 375fa9e4066Sahrens zap->zap_objset = os; 376fa9e4066Sahrens zap->zap_object = obj; 377fa9e4066Sahrens zap->zap_dbuf = db; 378fa9e4066Sahrens 379da6c28aaSamw if (*(uint64_t *)db->db_data != ZBT_MICRO) { 380fa9e4066Sahrens mutex_init(&zap->zap_f.zap_num_entries_mtx, 0, 0, 0); 381bf16b11eSMatthew Ahrens zap->zap_f.zap_block_shift = highbit64(db->db_size) - 1; 382fa9e4066Sahrens } else { 383fa9e4066Sahrens zap->zap_ismicro = TRUE; 384fa9e4066Sahrens } 385fa9e4066Sahrens 386fa9e4066Sahrens /* 387fa9e4066Sahrens * Make sure that zap_ismicro is set before we let others see 388fa9e4066Sahrens * it, because zap_lockdir() checks zap_ismicro without the lock 389fa9e4066Sahrens * held. 390fa9e4066Sahrens */ 391bc9014e6SJustin Gibbs dmu_buf_init_user(&zap->zap_dbu, zap_evict, &zap->zap_dbuf); 392bc9014e6SJustin Gibbs winner = dmu_buf_set_user(db, &zap->zap_dbu); 393fa9e4066Sahrens 394fa9e4066Sahrens if (winner != NULL) { 395c25056deSgw rw_exit(&zap->zap_rwlock); 396c25056deSgw rw_destroy(&zap->zap_rwlock); 397c25056deSgw if (!zap->zap_ismicro) 398c25056deSgw mutex_destroy(&zap->zap_f.zap_num_entries_mtx); 399fa9e4066Sahrens kmem_free(zap, sizeof (zap_t)); 400fa9e4066Sahrens return (winner); 401fa9e4066Sahrens } 402fa9e4066Sahrens 403fa9e4066Sahrens if (zap->zap_ismicro) { 404c1379625SJustin T. Gibbs zap->zap_salt = zap_m_phys(zap)->mz_salt; 405c1379625SJustin T. Gibbs zap->zap_normflags = zap_m_phys(zap)->mz_normflags; 406fa9e4066Sahrens zap->zap_m.zap_num_chunks = db->db_size / MZAP_ENT_LEN - 1; 407fa9e4066Sahrens avl_create(&zap->zap_m.zap_avl, mze_compare, 408fa9e4066Sahrens sizeof (mzap_ent_t), offsetof(mzap_ent_t, mze_node)); 409fa9e4066Sahrens 410fa9e4066Sahrens for (i = 0; i < zap->zap_m.zap_num_chunks; i++) { 411fa9e4066Sahrens mzap_ent_phys_t *mze = 412c1379625SJustin T. Gibbs &zap_m_phys(zap)->mz_chunk[i]; 413fa9e4066Sahrens if (mze->mze_name[0]) { 414da6c28aaSamw zap_name_t *zn; 415da6c28aaSamw 416fa9e4066Sahrens zap->zap_m.zap_num_entries++; 417da6c28aaSamw zn = zap_name_alloc(zap, mze->mze_name, 418da6c28aaSamw MT_EXACT); 4193f9d6ad7SLin Ling mze_insert(zap, i, zn->zn_hash); 420da6c28aaSamw zap_name_free(zn); 421fa9e4066Sahrens } 422fa9e4066Sahrens } 423fa9e4066Sahrens } else { 424c1379625SJustin T. Gibbs zap->zap_salt = zap_f_phys(zap)->zap_salt; 425c1379625SJustin T. Gibbs zap->zap_normflags = zap_f_phys(zap)->zap_normflags; 426f65e61c0Sahrens 427f65e61c0Sahrens ASSERT3U(sizeof (struct zap_leaf_header), ==, 428f65e61c0Sahrens 2*ZAP_LEAF_CHUNKSIZE); 429f65e61c0Sahrens 430f65e61c0Sahrens /* 431f65e61c0Sahrens * The embedded pointer table should not overlap the 432f65e61c0Sahrens * other members. 433f65e61c0Sahrens */ 434f65e61c0Sahrens ASSERT3P(&ZAP_EMBEDDED_PTRTBL_ENT(zap, 0), >, 435c1379625SJustin T. Gibbs &zap_f_phys(zap)->zap_salt); 436f65e61c0Sahrens 437f65e61c0Sahrens /* 438f65e61c0Sahrens * The embedded pointer table should end at the end of 439f65e61c0Sahrens * the block 440f65e61c0Sahrens */ 441f65e61c0Sahrens ASSERT3U((uintptr_t)&ZAP_EMBEDDED_PTRTBL_ENT(zap, 442f65e61c0Sahrens 1<<ZAP_EMBEDDED_PTRTBL_SHIFT(zap)) - 443c1379625SJustin T. Gibbs (uintptr_t)zap_f_phys(zap), ==, 444f65e61c0Sahrens zap->zap_dbuf->db_size); 445fa9e4066Sahrens } 446fa9e4066Sahrens rw_exit(&zap->zap_rwlock); 447fa9e4066Sahrens return (zap); 448fa9e4066Sahrens } 449fa9e4066Sahrens 450fa9e4066Sahrens int 451fa9e4066Sahrens zap_lockdir(objset_t *os, uint64_t obj, dmu_tx_t *tx, 452c5f9e431Sahrens krw_t lti, boolean_t fatreader, boolean_t adding, zap_t **zapp) 453fa9e4066Sahrens { 454fa9e4066Sahrens zap_t *zap; 455fa9e4066Sahrens dmu_buf_t *db; 456fa9e4066Sahrens krw_t lt; 457fa9e4066Sahrens int err; 458fa9e4066Sahrens 459fa9e4066Sahrens *zapp = NULL; 460fa9e4066Sahrens 46147cb52daSJeff Bonwick err = dmu_buf_hold(os, obj, 0, NULL, &db, DMU_READ_NO_PREFETCH); 462ea8dc4b6Seschrock if (err) 463ea8dc4b6Seschrock return (err); 464fa9e4066Sahrens 465fa9e4066Sahrens #ifdef ZFS_DEBUG 466fa9e4066Sahrens { 467fa9e4066Sahrens dmu_object_info_t doi; 468fa9e4066Sahrens dmu_object_info_from_db(db, &doi); 469ad135b5dSChristopher Siden ASSERT3U(DMU_OT_BYTESWAP(doi.doi_type), ==, DMU_BSWAP_ZAP); 470fa9e4066Sahrens } 471fa9e4066Sahrens #endif 472fa9e4066Sahrens 473fa9e4066Sahrens zap = dmu_buf_get_user(db); 474fa9e4066Sahrens if (zap == NULL) 475fa9e4066Sahrens zap = mzap_open(os, obj, db); 476fa9e4066Sahrens 477fa9e4066Sahrens /* 478fa9e4066Sahrens * We're checking zap_ismicro without the lock held, in order to 479fa9e4066Sahrens * tell what type of lock we want. Once we have some sort of 480fa9e4066Sahrens * lock, see if it really is the right type. In practice this 481fa9e4066Sahrens * can only be different if it was upgraded from micro to fat, 482fa9e4066Sahrens * and micro wanted WRITER but fat only needs READER. 483fa9e4066Sahrens */ 484fa9e4066Sahrens lt = (!zap->zap_ismicro && fatreader) ? RW_READER : lti; 485fa9e4066Sahrens rw_enter(&zap->zap_rwlock, lt); 486fa9e4066Sahrens if (lt != ((!zap->zap_ismicro && fatreader) ? RW_READER : lti)) { 487fa9e4066Sahrens /* it was upgraded, now we only need reader */ 488fa9e4066Sahrens ASSERT(lt == RW_WRITER); 489fa9e4066Sahrens ASSERT(RW_READER == 490fa9e4066Sahrens (!zap->zap_ismicro && fatreader) ? RW_READER : lti); 491fa9e4066Sahrens rw_downgrade(&zap->zap_rwlock); 492fa9e4066Sahrens lt = RW_READER; 493fa9e4066Sahrens } 494fa9e4066Sahrens 495fa9e4066Sahrens zap->zap_objset = os; 496fa9e4066Sahrens 497fa9e4066Sahrens if (lt == RW_WRITER) 498fa9e4066Sahrens dmu_buf_will_dirty(db, tx); 499fa9e4066Sahrens 500fa9e4066Sahrens ASSERT3P(zap->zap_dbuf, ==, db); 501fa9e4066Sahrens 502fa9e4066Sahrens ASSERT(!zap->zap_ismicro || 503fa9e4066Sahrens zap->zap_m.zap_num_entries <= zap->zap_m.zap_num_chunks); 504c5f9e431Sahrens if (zap->zap_ismicro && tx && adding && 505fa9e4066Sahrens zap->zap_m.zap_num_entries == zap->zap_m.zap_num_chunks) { 506fa9e4066Sahrens uint64_t newsz = db->db_size + SPA_MINBLOCKSIZE; 507fa9e4066Sahrens if (newsz > MZAP_MAX_BLKSZ) { 508fa9e4066Sahrens dprintf("upgrading obj %llu: num_entries=%u\n", 509fa9e4066Sahrens obj, zap->zap_m.zap_num_entries); 510fa9e4066Sahrens *zapp = zap; 511b24ab676SJeff Bonwick return (mzap_upgrade(zapp, tx, 0)); 512fa9e4066Sahrens } 513fa9e4066Sahrens err = dmu_object_set_blocksize(os, obj, newsz, 0, tx); 514fb09f5aaSMadhav Suresh ASSERT0(err); 515fa9e4066Sahrens zap->zap_m.zap_num_chunks = 516fa9e4066Sahrens db->db_size / MZAP_ENT_LEN - 1; 517fa9e4066Sahrens } 518fa9e4066Sahrens 519fa9e4066Sahrens *zapp = zap; 520fa9e4066Sahrens return (0); 521fa9e4066Sahrens } 522fa9e4066Sahrens 523fa9e4066Sahrens void 524fa9e4066Sahrens zap_unlockdir(zap_t *zap) 525fa9e4066Sahrens { 526fa9e4066Sahrens rw_exit(&zap->zap_rwlock); 527ea8dc4b6Seschrock dmu_buf_rele(zap->zap_dbuf, NULL); 528fa9e4066Sahrens } 529fa9e4066Sahrens 530ad860c82Sbonwick static int 531b24ab676SJeff Bonwick mzap_upgrade(zap_t **zapp, dmu_tx_t *tx, zap_flags_t flags) 532fa9e4066Sahrens { 533fa9e4066Sahrens mzap_phys_t *mzp; 534b24ab676SJeff Bonwick int i, sz, nchunks; 535b24ab676SJeff Bonwick int err = 0; 536ad860c82Sbonwick zap_t *zap = *zapp; 537fa9e4066Sahrens 538fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 539fa9e4066Sahrens 540fa9e4066Sahrens sz = zap->zap_dbuf->db_size; 541*be3e2ab9SBrian Behlendorf mzp = zio_buf_alloc(sz); 542fa9e4066Sahrens bcopy(zap->zap_dbuf->db_data, mzp, sz); 543fa9e4066Sahrens nchunks = zap->zap_m.zap_num_chunks; 544fa9e4066Sahrens 545b24ab676SJeff Bonwick if (!flags) { 546b24ab676SJeff Bonwick err = dmu_object_set_blocksize(zap->zap_objset, zap->zap_object, 547b24ab676SJeff Bonwick 1ULL << fzap_default_block_shift, 0, tx); 548b24ab676SJeff Bonwick if (err) { 549*be3e2ab9SBrian Behlendorf zio_buf_free(mzp, sz); 550b24ab676SJeff Bonwick return (err); 551b24ab676SJeff Bonwick } 552ad860c82Sbonwick } 553fa9e4066Sahrens 554fa9e4066Sahrens dprintf("upgrading obj=%llu with %u chunks\n", 555fa9e4066Sahrens zap->zap_object, nchunks); 556da6c28aaSamw /* XXX destroy the avl later, so we can use the stored hash value */ 557fa9e4066Sahrens mze_destroy(zap); 558fa9e4066Sahrens 559b24ab676SJeff Bonwick fzap_upgrade(zap, tx, flags); 560fa9e4066Sahrens 561fa9e4066Sahrens for (i = 0; i < nchunks; i++) { 562fa9e4066Sahrens mzap_ent_phys_t *mze = &mzp->mz_chunk[i]; 563da6c28aaSamw zap_name_t *zn; 564fa9e4066Sahrens if (mze->mze_name[0] == 0) 565fa9e4066Sahrens continue; 566fa9e4066Sahrens dprintf("adding %s=%llu\n", 567fa9e4066Sahrens mze->mze_name, mze->mze_value); 568da6c28aaSamw zn = zap_name_alloc(zap, mze->mze_name, MT_EXACT); 569ad860c82Sbonwick err = fzap_add_cd(zn, 8, 1, &mze->mze_value, mze->mze_cd, tx); 570ad860c82Sbonwick zap = zn->zn_zap; /* fzap_add_cd() may change zap */ 571da6c28aaSamw zap_name_free(zn); 572ad860c82Sbonwick if (err) 573ad860c82Sbonwick break; 574fa9e4066Sahrens } 575*be3e2ab9SBrian Behlendorf zio_buf_free(mzp, sz); 576ad860c82Sbonwick *zapp = zap; 577ad860c82Sbonwick return (err); 578fa9e4066Sahrens } 579fa9e4066Sahrens 5802acef22dSMatthew Ahrens void 581b24ab676SJeff Bonwick mzap_create_impl(objset_t *os, uint64_t obj, int normflags, zap_flags_t flags, 582b24ab676SJeff Bonwick dmu_tx_t *tx) 583fa9e4066Sahrens { 584fa9e4066Sahrens dmu_buf_t *db; 585fa9e4066Sahrens mzap_phys_t *zp; 586fa9e4066Sahrens 58747cb52daSJeff Bonwick VERIFY(0 == dmu_buf_hold(os, obj, 0, FTAG, &db, DMU_READ_NO_PREFETCH)); 588fa9e4066Sahrens 589fa9e4066Sahrens #ifdef ZFS_DEBUG 590fa9e4066Sahrens { 591fa9e4066Sahrens dmu_object_info_t doi; 592fa9e4066Sahrens dmu_object_info_from_db(db, &doi); 593ad135b5dSChristopher Siden ASSERT3U(DMU_OT_BYTESWAP(doi.doi_type), ==, DMU_BSWAP_ZAP); 594fa9e4066Sahrens } 595fa9e4066Sahrens #endif 596fa9e4066Sahrens 597fa9e4066Sahrens dmu_buf_will_dirty(db, tx); 598fa9e4066Sahrens zp = db->db_data; 599fa9e4066Sahrens zp->mz_block_type = ZBT_MICRO; 600fa9e4066Sahrens zp->mz_salt = ((uintptr_t)db ^ (uintptr_t)tx ^ (obj << 1)) | 1ULL; 601da6c28aaSamw zp->mz_normflags = normflags; 602ea8dc4b6Seschrock dmu_buf_rele(db, FTAG); 603b24ab676SJeff Bonwick 604b24ab676SJeff Bonwick if (flags != 0) { 605b24ab676SJeff Bonwick zap_t *zap; 606b24ab676SJeff Bonwick /* Only fat zap supports flags; upgrade immediately. */ 607b24ab676SJeff Bonwick VERIFY(0 == zap_lockdir(os, obj, tx, RW_WRITER, 608b24ab676SJeff Bonwick B_FALSE, B_FALSE, &zap)); 609b420f3adSRichard Lowe VERIFY3U(0, ==, mzap_upgrade(&zap, tx, flags)); 610b24ab676SJeff Bonwick zap_unlockdir(zap); 611b24ab676SJeff Bonwick } 612fa9e4066Sahrens } 613fa9e4066Sahrens 614fa9e4066Sahrens int 615fa9e4066Sahrens zap_create_claim(objset_t *os, uint64_t obj, dmu_object_type_t ot, 616fa9e4066Sahrens dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) 617da6c28aaSamw { 618da6c28aaSamw return (zap_create_claim_norm(os, obj, 619da6c28aaSamw 0, ot, bonustype, bonuslen, tx)); 620da6c28aaSamw } 621da6c28aaSamw 622da6c28aaSamw int 623da6c28aaSamw zap_create_claim_norm(objset_t *os, uint64_t obj, int normflags, 624da6c28aaSamw dmu_object_type_t ot, 625da6c28aaSamw dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) 626fa9e4066Sahrens { 627fa9e4066Sahrens int err; 628fa9e4066Sahrens 629fa9e4066Sahrens err = dmu_object_claim(os, obj, ot, 0, bonustype, bonuslen, tx); 630fa9e4066Sahrens if (err != 0) 631fa9e4066Sahrens return (err); 632b24ab676SJeff Bonwick mzap_create_impl(os, obj, normflags, 0, tx); 633fa9e4066Sahrens return (0); 634fa9e4066Sahrens } 635fa9e4066Sahrens 636fa9e4066Sahrens uint64_t 637fa9e4066Sahrens zap_create(objset_t *os, dmu_object_type_t ot, 638fa9e4066Sahrens dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) 639da6c28aaSamw { 640da6c28aaSamw return (zap_create_norm(os, 0, ot, bonustype, bonuslen, tx)); 641da6c28aaSamw } 642da6c28aaSamw 643da6c28aaSamw uint64_t 644da6c28aaSamw zap_create_norm(objset_t *os, int normflags, dmu_object_type_t ot, 645da6c28aaSamw dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) 646fa9e4066Sahrens { 647fa9e4066Sahrens uint64_t obj = dmu_object_alloc(os, ot, 0, bonustype, bonuslen, tx); 648fa9e4066Sahrens 649b24ab676SJeff Bonwick mzap_create_impl(os, obj, normflags, 0, tx); 650b24ab676SJeff Bonwick return (obj); 651b24ab676SJeff Bonwick } 652b24ab676SJeff Bonwick 653b24ab676SJeff Bonwick uint64_t 654b24ab676SJeff Bonwick zap_create_flags(objset_t *os, int normflags, zap_flags_t flags, 655b24ab676SJeff Bonwick dmu_object_type_t ot, int leaf_blockshift, int indirect_blockshift, 656b24ab676SJeff Bonwick dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) 657b24ab676SJeff Bonwick { 658b24ab676SJeff Bonwick uint64_t obj = dmu_object_alloc(os, ot, 0, bonustype, bonuslen, tx); 659b24ab676SJeff Bonwick 660b24ab676SJeff Bonwick ASSERT(leaf_blockshift >= SPA_MINBLOCKSHIFT && 661b5152584SMatthew Ahrens leaf_blockshift <= SPA_OLD_MAXBLOCKSHIFT && 662b24ab676SJeff Bonwick indirect_blockshift >= SPA_MINBLOCKSHIFT && 663b5152584SMatthew Ahrens indirect_blockshift <= SPA_OLD_MAXBLOCKSHIFT); 664b24ab676SJeff Bonwick 665b24ab676SJeff Bonwick VERIFY(dmu_object_set_blocksize(os, obj, 666b24ab676SJeff Bonwick 1ULL << leaf_blockshift, indirect_blockshift, tx) == 0); 667b24ab676SJeff Bonwick 668b24ab676SJeff Bonwick mzap_create_impl(os, obj, normflags, flags, tx); 669fa9e4066Sahrens return (obj); 670fa9e4066Sahrens } 671fa9e4066Sahrens 672fa9e4066Sahrens int 673fa9e4066Sahrens zap_destroy(objset_t *os, uint64_t zapobj, dmu_tx_t *tx) 674fa9e4066Sahrens { 675fa9e4066Sahrens /* 676fa9e4066Sahrens * dmu_object_free will free the object number and free the 677fa9e4066Sahrens * data. Freeing the data will cause our pageout function to be 678fa9e4066Sahrens * called, which will destroy our data (zap_leaf_t's and zap_t). 679fa9e4066Sahrens */ 680fa9e4066Sahrens 681fa9e4066Sahrens return (dmu_object_free(os, zapobj, tx)); 682fa9e4066Sahrens } 683fa9e4066Sahrens 684fa9e4066Sahrens void 685bc9014e6SJustin Gibbs zap_evict(void *dbu) 686fa9e4066Sahrens { 687bc9014e6SJustin Gibbs zap_t *zap = dbu; 688fa9e4066Sahrens 689fa9e4066Sahrens rw_destroy(&zap->zap_rwlock); 690fa9e4066Sahrens 691f65e61c0Sahrens if (zap->zap_ismicro) 692fa9e4066Sahrens mze_destroy(zap); 693c25056deSgw else 694c25056deSgw mutex_destroy(&zap->zap_f.zap_num_entries_mtx); 695fa9e4066Sahrens 696fa9e4066Sahrens kmem_free(zap, sizeof (zap_t)); 697fa9e4066Sahrens } 698fa9e4066Sahrens 699fa9e4066Sahrens int 700fa9e4066Sahrens zap_count(objset_t *os, uint64_t zapobj, uint64_t *count) 701fa9e4066Sahrens { 702fa9e4066Sahrens zap_t *zap; 703fa9e4066Sahrens int err; 704fa9e4066Sahrens 705c5f9e431Sahrens err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); 706fa9e4066Sahrens if (err) 707fa9e4066Sahrens return (err); 708fa9e4066Sahrens if (!zap->zap_ismicro) { 709fa9e4066Sahrens err = fzap_count(zap, count); 710fa9e4066Sahrens } else { 711fa9e4066Sahrens *count = zap->zap_m.zap_num_entries; 712fa9e4066Sahrens } 713fa9e4066Sahrens zap_unlockdir(zap); 714fa9e4066Sahrens return (err); 715fa9e4066Sahrens } 716fa9e4066Sahrens 717fa9e4066Sahrens /* 718da6c28aaSamw * zn may be NULL; if not specified, it will be computed if needed. 719da6c28aaSamw * See also the comment above zap_entry_normalization_conflict(). 720da6c28aaSamw */ 721da6c28aaSamw static boolean_t 722da6c28aaSamw mzap_normalization_conflict(zap_t *zap, zap_name_t *zn, mzap_ent_t *mze) 723da6c28aaSamw { 724da6c28aaSamw mzap_ent_t *other; 725da6c28aaSamw int direction = AVL_BEFORE; 726da6c28aaSamw boolean_t allocdzn = B_FALSE; 727da6c28aaSamw 728da6c28aaSamw if (zap->zap_normflags == 0) 729da6c28aaSamw return (B_FALSE); 730da6c28aaSamw 731da6c28aaSamw again: 732da6c28aaSamw for (other = avl_walk(&zap->zap_m.zap_avl, mze, direction); 733da6c28aaSamw other && other->mze_hash == mze->mze_hash; 734da6c28aaSamw other = avl_walk(&zap->zap_m.zap_avl, other, direction)) { 735da6c28aaSamw 736da6c28aaSamw if (zn == NULL) { 7373f9d6ad7SLin Ling zn = zap_name_alloc(zap, MZE_PHYS(zap, mze)->mze_name, 738da6c28aaSamw MT_FIRST); 739da6c28aaSamw allocdzn = B_TRUE; 740da6c28aaSamw } 7413f9d6ad7SLin Ling if (zap_match(zn, MZE_PHYS(zap, other)->mze_name)) { 742da6c28aaSamw if (allocdzn) 743da6c28aaSamw zap_name_free(zn); 744da6c28aaSamw return (B_TRUE); 745da6c28aaSamw } 746da6c28aaSamw } 747da6c28aaSamw 748da6c28aaSamw if (direction == AVL_BEFORE) { 749da6c28aaSamw direction = AVL_AFTER; 750da6c28aaSamw goto again; 751da6c28aaSamw } 752da6c28aaSamw 753da6c28aaSamw if (allocdzn) 754da6c28aaSamw zap_name_free(zn); 755da6c28aaSamw return (B_FALSE); 756da6c28aaSamw } 757da6c28aaSamw 758da6c28aaSamw /* 759da6c28aaSamw * Routines for manipulating attributes. 760fa9e4066Sahrens */ 761fa9e4066Sahrens 762fa9e4066Sahrens int 763fa9e4066Sahrens zap_lookup(objset_t *os, uint64_t zapobj, const char *name, 764fa9e4066Sahrens uint64_t integer_size, uint64_t num_integers, void *buf) 765da6c28aaSamw { 766da6c28aaSamw return (zap_lookup_norm(os, zapobj, name, integer_size, 767da6c28aaSamw num_integers, buf, MT_EXACT, NULL, 0, NULL)); 768da6c28aaSamw } 769da6c28aaSamw 770da6c28aaSamw int 771da6c28aaSamw zap_lookup_norm(objset_t *os, uint64_t zapobj, const char *name, 772da6c28aaSamw uint64_t integer_size, uint64_t num_integers, void *buf, 773da6c28aaSamw matchtype_t mt, char *realname, int rn_len, 774da6c28aaSamw boolean_t *ncp) 775fa9e4066Sahrens { 776fa9e4066Sahrens zap_t *zap; 777fa9e4066Sahrens int err; 778fa9e4066Sahrens mzap_ent_t *mze; 779da6c28aaSamw zap_name_t *zn; 780fa9e4066Sahrens 781c5f9e431Sahrens err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); 782fa9e4066Sahrens if (err) 783fa9e4066Sahrens return (err); 784da6c28aaSamw zn = zap_name_alloc(zap, name, mt); 785da6c28aaSamw if (zn == NULL) { 786da6c28aaSamw zap_unlockdir(zap); 787be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 788da6c28aaSamw } 789da6c28aaSamw 790fa9e4066Sahrens if (!zap->zap_ismicro) { 791da6c28aaSamw err = fzap_lookup(zn, integer_size, num_integers, buf, 792da6c28aaSamw realname, rn_len, ncp); 793fa9e4066Sahrens } else { 794da6c28aaSamw mze = mze_find(zn); 795fa9e4066Sahrens if (mze == NULL) { 796be6fd75aSMatthew Ahrens err = SET_ERROR(ENOENT); 797fa9e4066Sahrens } else { 798da6c28aaSamw if (num_integers < 1) { 799be6fd75aSMatthew Ahrens err = SET_ERROR(EOVERFLOW); 800da6c28aaSamw } else if (integer_size != 8) { 801be6fd75aSMatthew Ahrens err = SET_ERROR(EINVAL); 802da6c28aaSamw } else { 8033f9d6ad7SLin Ling *(uint64_t *)buf = 8043f9d6ad7SLin Ling MZE_PHYS(zap, mze)->mze_value; 805da6c28aaSamw (void) strlcpy(realname, 8063f9d6ad7SLin Ling MZE_PHYS(zap, mze)->mze_name, rn_len); 807da6c28aaSamw if (ncp) { 808da6c28aaSamw *ncp = mzap_normalization_conflict(zap, 809da6c28aaSamw zn, mze); 810da6c28aaSamw } 811da6c28aaSamw } 812fa9e4066Sahrens } 813fa9e4066Sahrens } 814da6c28aaSamw zap_name_free(zn); 815fa9e4066Sahrens zap_unlockdir(zap); 816fa9e4066Sahrens return (err); 817fa9e4066Sahrens } 818fa9e4066Sahrens 819c7cd2421SGeorge Wilson int 820c7cd2421SGeorge Wilson zap_prefetch_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, 821c7cd2421SGeorge Wilson int key_numints) 822c7cd2421SGeorge Wilson { 823c7cd2421SGeorge Wilson zap_t *zap; 824c7cd2421SGeorge Wilson int err; 825c7cd2421SGeorge Wilson zap_name_t *zn; 826c7cd2421SGeorge Wilson 827c7cd2421SGeorge Wilson err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); 828c7cd2421SGeorge Wilson if (err) 829c7cd2421SGeorge Wilson return (err); 830c7cd2421SGeorge Wilson zn = zap_name_alloc_uint64(zap, key, key_numints); 831c7cd2421SGeorge Wilson if (zn == NULL) { 832c7cd2421SGeorge Wilson zap_unlockdir(zap); 833be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 834c7cd2421SGeorge Wilson } 835c7cd2421SGeorge Wilson 836c7cd2421SGeorge Wilson fzap_prefetch(zn); 837c7cd2421SGeorge Wilson zap_name_free(zn); 838c7cd2421SGeorge Wilson zap_unlockdir(zap); 839c7cd2421SGeorge Wilson return (err); 840c7cd2421SGeorge Wilson } 841c7cd2421SGeorge Wilson 842b24ab676SJeff Bonwick int 843b24ab676SJeff Bonwick zap_lookup_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, 844b24ab676SJeff Bonwick int key_numints, uint64_t integer_size, uint64_t num_integers, void *buf) 845b24ab676SJeff Bonwick { 846b24ab676SJeff Bonwick zap_t *zap; 847b24ab676SJeff Bonwick int err; 848b24ab676SJeff Bonwick zap_name_t *zn; 849b24ab676SJeff Bonwick 850b24ab676SJeff Bonwick err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); 851b24ab676SJeff Bonwick if (err) 852b24ab676SJeff Bonwick return (err); 853b24ab676SJeff Bonwick zn = zap_name_alloc_uint64(zap, key, key_numints); 854b24ab676SJeff Bonwick if (zn == NULL) { 855b24ab676SJeff Bonwick zap_unlockdir(zap); 856be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 857b24ab676SJeff Bonwick } 858b24ab676SJeff Bonwick 859b24ab676SJeff Bonwick err = fzap_lookup(zn, integer_size, num_integers, buf, 860b24ab676SJeff Bonwick NULL, 0, NULL); 861b24ab676SJeff Bonwick zap_name_free(zn); 862b24ab676SJeff Bonwick zap_unlockdir(zap); 863b24ab676SJeff Bonwick return (err); 864b24ab676SJeff Bonwick } 865b24ab676SJeff Bonwick 86692241e0bSTom Erickson int 86792241e0bSTom Erickson zap_contains(objset_t *os, uint64_t zapobj, const char *name) 86892241e0bSTom Erickson { 8692acef22dSMatthew Ahrens int err = zap_lookup_norm(os, zapobj, name, 0, 8702acef22dSMatthew Ahrens 0, NULL, MT_EXACT, NULL, 0, NULL); 87192241e0bSTom Erickson if (err == EOVERFLOW || err == EINVAL) 87292241e0bSTom Erickson err = 0; /* found, but skipped reading the value */ 87392241e0bSTom Erickson return (err); 87492241e0bSTom Erickson } 87592241e0bSTom Erickson 876fa9e4066Sahrens int 877fa9e4066Sahrens zap_length(objset_t *os, uint64_t zapobj, const char *name, 878fa9e4066Sahrens uint64_t *integer_size, uint64_t *num_integers) 879fa9e4066Sahrens { 880fa9e4066Sahrens zap_t *zap; 881fa9e4066Sahrens int err; 882fa9e4066Sahrens mzap_ent_t *mze; 883da6c28aaSamw zap_name_t *zn; 884fa9e4066Sahrens 885c5f9e431Sahrens err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); 886fa9e4066Sahrens if (err) 887fa9e4066Sahrens return (err); 888da6c28aaSamw zn = zap_name_alloc(zap, name, MT_EXACT); 889da6c28aaSamw if (zn == NULL) { 890da6c28aaSamw zap_unlockdir(zap); 891be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 892da6c28aaSamw } 893fa9e4066Sahrens if (!zap->zap_ismicro) { 894da6c28aaSamw err = fzap_length(zn, integer_size, num_integers); 895fa9e4066Sahrens } else { 896da6c28aaSamw mze = mze_find(zn); 897fa9e4066Sahrens if (mze == NULL) { 898be6fd75aSMatthew Ahrens err = SET_ERROR(ENOENT); 899fa9e4066Sahrens } else { 900fa9e4066Sahrens if (integer_size) 901fa9e4066Sahrens *integer_size = 8; 902fa9e4066Sahrens if (num_integers) 903fa9e4066Sahrens *num_integers = 1; 904fa9e4066Sahrens } 905fa9e4066Sahrens } 906da6c28aaSamw zap_name_free(zn); 907fa9e4066Sahrens zap_unlockdir(zap); 908fa9e4066Sahrens return (err); 909fa9e4066Sahrens } 910fa9e4066Sahrens 911b24ab676SJeff Bonwick int 912b24ab676SJeff Bonwick zap_length_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, 913b24ab676SJeff Bonwick int key_numints, uint64_t *integer_size, uint64_t *num_integers) 914b24ab676SJeff Bonwick { 915b24ab676SJeff Bonwick zap_t *zap; 916b24ab676SJeff Bonwick int err; 917b24ab676SJeff Bonwick zap_name_t *zn; 918b24ab676SJeff Bonwick 919b24ab676SJeff Bonwick err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); 920b24ab676SJeff Bonwick if (err) 921b24ab676SJeff Bonwick return (err); 922b24ab676SJeff Bonwick zn = zap_name_alloc_uint64(zap, key, key_numints); 923b24ab676SJeff Bonwick if (zn == NULL) { 924b24ab676SJeff Bonwick zap_unlockdir(zap); 925be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 926b24ab676SJeff Bonwick } 927b24ab676SJeff Bonwick err = fzap_length(zn, integer_size, num_integers); 928b24ab676SJeff Bonwick zap_name_free(zn); 929b24ab676SJeff Bonwick zap_unlockdir(zap); 930b24ab676SJeff Bonwick return (err); 931b24ab676SJeff Bonwick } 932b24ab676SJeff Bonwick 933fa9e4066Sahrens static void 934da6c28aaSamw mzap_addent(zap_name_t *zn, uint64_t value) 935fa9e4066Sahrens { 936fa9e4066Sahrens int i; 937da6c28aaSamw zap_t *zap = zn->zn_zap; 938fa9e4066Sahrens int start = zap->zap_m.zap_alloc_next; 939fa9e4066Sahrens uint32_t cd; 940fa9e4066Sahrens 941fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 942fa9e4066Sahrens 943fa9e4066Sahrens #ifdef ZFS_DEBUG 944fa9e4066Sahrens for (i = 0; i < zap->zap_m.zap_num_chunks; i++) { 945c1379625SJustin T. Gibbs mzap_ent_phys_t *mze = &zap_m_phys(zap)->mz_chunk[i]; 946b24ab676SJeff Bonwick ASSERT(strcmp(zn->zn_key_orig, mze->mze_name) != 0); 947fa9e4066Sahrens } 948fa9e4066Sahrens #endif 949fa9e4066Sahrens 950da6c28aaSamw cd = mze_find_unused_cd(zap, zn->zn_hash); 951fa9e4066Sahrens /* given the limited size of the microzap, this can't happen */ 952b24ab676SJeff Bonwick ASSERT(cd < zap_maxcd(zap)); 953fa9e4066Sahrens 954fa9e4066Sahrens again: 955fa9e4066Sahrens for (i = start; i < zap->zap_m.zap_num_chunks; i++) { 956c1379625SJustin T. Gibbs mzap_ent_phys_t *mze = &zap_m_phys(zap)->mz_chunk[i]; 957fa9e4066Sahrens if (mze->mze_name[0] == 0) { 958fa9e4066Sahrens mze->mze_value = value; 959fa9e4066Sahrens mze->mze_cd = cd; 960b24ab676SJeff Bonwick (void) strcpy(mze->mze_name, zn->zn_key_orig); 961fa9e4066Sahrens zap->zap_m.zap_num_entries++; 962fa9e4066Sahrens zap->zap_m.zap_alloc_next = i+1; 963fa9e4066Sahrens if (zap->zap_m.zap_alloc_next == 964fa9e4066Sahrens zap->zap_m.zap_num_chunks) 965fa9e4066Sahrens zap->zap_m.zap_alloc_next = 0; 9663f9d6ad7SLin Ling mze_insert(zap, i, zn->zn_hash); 967fa9e4066Sahrens return; 968fa9e4066Sahrens } 969fa9e4066Sahrens } 970fa9e4066Sahrens if (start != 0) { 971fa9e4066Sahrens start = 0; 972fa9e4066Sahrens goto again; 973fa9e4066Sahrens } 974fa9e4066Sahrens ASSERT(!"out of entries!"); 975fa9e4066Sahrens } 976fa9e4066Sahrens 977fa9e4066Sahrens int 978b24ab676SJeff Bonwick zap_add(objset_t *os, uint64_t zapobj, const char *key, 979fa9e4066Sahrens int integer_size, uint64_t num_integers, 980fa9e4066Sahrens const void *val, dmu_tx_t *tx) 981fa9e4066Sahrens { 982fa9e4066Sahrens zap_t *zap; 983fa9e4066Sahrens int err; 984fa9e4066Sahrens mzap_ent_t *mze; 985fa9e4066Sahrens const uint64_t *intval = val; 986da6c28aaSamw zap_name_t *zn; 987fa9e4066Sahrens 988c5f9e431Sahrens err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, &zap); 989fa9e4066Sahrens if (err) 990fa9e4066Sahrens return (err); 991b24ab676SJeff Bonwick zn = zap_name_alloc(zap, key, MT_EXACT); 992da6c28aaSamw if (zn == NULL) { 993da6c28aaSamw zap_unlockdir(zap); 994be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 995da6c28aaSamw } 996fa9e4066Sahrens if (!zap->zap_ismicro) { 997da6c28aaSamw err = fzap_add(zn, integer_size, num_integers, val, tx); 998ad860c82Sbonwick zap = zn->zn_zap; /* fzap_add() may change zap */ 999fa9e4066Sahrens } else if (integer_size != 8 || num_integers != 1 || 1000b24ab676SJeff Bonwick strlen(key) >= MZAP_NAME_LEN) { 1001b24ab676SJeff Bonwick err = mzap_upgrade(&zn->zn_zap, tx, 0); 1002ad860c82Sbonwick if (err == 0) 1003ad860c82Sbonwick err = fzap_add(zn, integer_size, num_integers, val, tx); 1004ad860c82Sbonwick zap = zn->zn_zap; /* fzap_add() may change zap */ 1005fa9e4066Sahrens } else { 1006da6c28aaSamw mze = mze_find(zn); 1007fa9e4066Sahrens if (mze != NULL) { 1008be6fd75aSMatthew Ahrens err = SET_ERROR(EEXIST); 1009fa9e4066Sahrens } else { 1010da6c28aaSamw mzap_addent(zn, *intval); 1011fa9e4066Sahrens } 1012fa9e4066Sahrens } 1013ad860c82Sbonwick ASSERT(zap == zn->zn_zap); 1014da6c28aaSamw zap_name_free(zn); 1015ad860c82Sbonwick if (zap != NULL) /* may be NULL if fzap_add() failed */ 1016ad860c82Sbonwick zap_unlockdir(zap); 1017fa9e4066Sahrens return (err); 1018fa9e4066Sahrens } 1019fa9e4066Sahrens 1020b24ab676SJeff Bonwick int 1021b24ab676SJeff Bonwick zap_add_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, 1022b24ab676SJeff Bonwick int key_numints, int integer_size, uint64_t num_integers, 1023b24ab676SJeff Bonwick const void *val, dmu_tx_t *tx) 1024b24ab676SJeff Bonwick { 1025b24ab676SJeff Bonwick zap_t *zap; 1026b24ab676SJeff Bonwick int err; 1027b24ab676SJeff Bonwick zap_name_t *zn; 1028b24ab676SJeff Bonwick 1029b24ab676SJeff Bonwick err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, &zap); 1030b24ab676SJeff Bonwick if (err) 1031b24ab676SJeff Bonwick return (err); 1032b24ab676SJeff Bonwick zn = zap_name_alloc_uint64(zap, key, key_numints); 1033b24ab676SJeff Bonwick if (zn == NULL) { 1034b24ab676SJeff Bonwick zap_unlockdir(zap); 1035be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 1036b24ab676SJeff Bonwick } 1037b24ab676SJeff Bonwick err = fzap_add(zn, integer_size, num_integers, val, tx); 1038b24ab676SJeff Bonwick zap = zn->zn_zap; /* fzap_add() may change zap */ 1039b24ab676SJeff Bonwick zap_name_free(zn); 1040b24ab676SJeff Bonwick if (zap != NULL) /* may be NULL if fzap_add() failed */ 1041b24ab676SJeff Bonwick zap_unlockdir(zap); 1042b24ab676SJeff Bonwick return (err); 1043b24ab676SJeff Bonwick } 1044b24ab676SJeff Bonwick 1045fa9e4066Sahrens int 1046fa9e4066Sahrens zap_update(objset_t *os, uint64_t zapobj, const char *name, 1047fa9e4066Sahrens int integer_size, uint64_t num_integers, const void *val, dmu_tx_t *tx) 1048fa9e4066Sahrens { 1049fa9e4066Sahrens zap_t *zap; 1050fa9e4066Sahrens mzap_ent_t *mze; 10513f9d6ad7SLin Ling uint64_t oldval; 1052fa9e4066Sahrens const uint64_t *intval = val; 1053da6c28aaSamw zap_name_t *zn; 1054fa9e4066Sahrens int err; 1055fa9e4066Sahrens 10563f9d6ad7SLin Ling #ifdef ZFS_DEBUG 10573f9d6ad7SLin Ling /* 10583f9d6ad7SLin Ling * If there is an old value, it shouldn't change across the 10593f9d6ad7SLin Ling * lockdir (eg, due to bprewrite's xlation). 10603f9d6ad7SLin Ling */ 10613f9d6ad7SLin Ling if (integer_size == 8 && num_integers == 1) 10623f9d6ad7SLin Ling (void) zap_lookup(os, zapobj, name, 8, 1, &oldval); 10633f9d6ad7SLin Ling #endif 10643f9d6ad7SLin Ling 1065c5f9e431Sahrens err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, &zap); 1066fa9e4066Sahrens if (err) 1067fa9e4066Sahrens return (err); 1068da6c28aaSamw zn = zap_name_alloc(zap, name, MT_EXACT); 1069da6c28aaSamw if (zn == NULL) { 1070da6c28aaSamw zap_unlockdir(zap); 1071be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 1072da6c28aaSamw } 1073fa9e4066Sahrens if (!zap->zap_ismicro) { 1074da6c28aaSamw err = fzap_update(zn, integer_size, num_integers, val, tx); 1075ad860c82Sbonwick zap = zn->zn_zap; /* fzap_update() may change zap */ 1076fa9e4066Sahrens } else if (integer_size != 8 || num_integers != 1 || 1077fa9e4066Sahrens strlen(name) >= MZAP_NAME_LEN) { 1078fa9e4066Sahrens dprintf("upgrading obj %llu: intsz=%u numint=%llu name=%s\n", 1079fa9e4066Sahrens zapobj, integer_size, num_integers, name); 1080b24ab676SJeff Bonwick err = mzap_upgrade(&zn->zn_zap, tx, 0); 1081ad860c82Sbonwick if (err == 0) 1082ad860c82Sbonwick err = fzap_update(zn, integer_size, num_integers, 1083ad860c82Sbonwick val, tx); 1084ad860c82Sbonwick zap = zn->zn_zap; /* fzap_update() may change zap */ 1085fa9e4066Sahrens } else { 1086da6c28aaSamw mze = mze_find(zn); 1087fa9e4066Sahrens if (mze != NULL) { 10883f9d6ad7SLin Ling ASSERT3U(MZE_PHYS(zap, mze)->mze_value, ==, oldval); 10893f9d6ad7SLin Ling MZE_PHYS(zap, mze)->mze_value = *intval; 1090fa9e4066Sahrens } else { 1091da6c28aaSamw mzap_addent(zn, *intval); 1092fa9e4066Sahrens } 1093fa9e4066Sahrens } 1094ad860c82Sbonwick ASSERT(zap == zn->zn_zap); 1095da6c28aaSamw zap_name_free(zn); 1096ad860c82Sbonwick if (zap != NULL) /* may be NULL if fzap_upgrade() failed */ 1097ad860c82Sbonwick zap_unlockdir(zap); 1098455d5089Sahrens return (err); 1099fa9e4066Sahrens } 1100fa9e4066Sahrens 1101b24ab676SJeff Bonwick int 1102b24ab676SJeff Bonwick zap_update_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, 1103b24ab676SJeff Bonwick int key_numints, 1104b24ab676SJeff Bonwick int integer_size, uint64_t num_integers, const void *val, dmu_tx_t *tx) 1105b24ab676SJeff Bonwick { 1106b24ab676SJeff Bonwick zap_t *zap; 1107b24ab676SJeff Bonwick zap_name_t *zn; 1108b24ab676SJeff Bonwick int err; 1109b24ab676SJeff Bonwick 1110b24ab676SJeff Bonwick err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, &zap); 1111b24ab676SJeff Bonwick if (err) 1112b24ab676SJeff Bonwick return (err); 1113b24ab676SJeff Bonwick zn = zap_name_alloc_uint64(zap, key, key_numints); 1114b24ab676SJeff Bonwick if (zn == NULL) { 1115b24ab676SJeff Bonwick zap_unlockdir(zap); 1116be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 1117b24ab676SJeff Bonwick } 1118b24ab676SJeff Bonwick err = fzap_update(zn, integer_size, num_integers, val, tx); 1119b24ab676SJeff Bonwick zap = zn->zn_zap; /* fzap_update() may change zap */ 1120b24ab676SJeff Bonwick zap_name_free(zn); 1121b24ab676SJeff Bonwick if (zap != NULL) /* may be NULL if fzap_upgrade() failed */ 1122b24ab676SJeff Bonwick zap_unlockdir(zap); 1123b24ab676SJeff Bonwick return (err); 1124b24ab676SJeff Bonwick } 1125b24ab676SJeff Bonwick 1126fa9e4066Sahrens int 1127fa9e4066Sahrens zap_remove(objset_t *os, uint64_t zapobj, const char *name, dmu_tx_t *tx) 1128da6c28aaSamw { 1129da6c28aaSamw return (zap_remove_norm(os, zapobj, name, MT_EXACT, tx)); 1130da6c28aaSamw } 1131da6c28aaSamw 1132da6c28aaSamw int 1133da6c28aaSamw zap_remove_norm(objset_t *os, uint64_t zapobj, const char *name, 1134da6c28aaSamw matchtype_t mt, dmu_tx_t *tx) 1135fa9e4066Sahrens { 1136fa9e4066Sahrens zap_t *zap; 1137fa9e4066Sahrens int err; 1138fa9e4066Sahrens mzap_ent_t *mze; 1139da6c28aaSamw zap_name_t *zn; 1140fa9e4066Sahrens 1141c5f9e431Sahrens err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, FALSE, &zap); 1142fa9e4066Sahrens if (err) 1143fa9e4066Sahrens return (err); 1144da6c28aaSamw zn = zap_name_alloc(zap, name, mt); 1145da6c28aaSamw if (zn == NULL) { 1146da6c28aaSamw zap_unlockdir(zap); 1147be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 1148da6c28aaSamw } 1149fa9e4066Sahrens if (!zap->zap_ismicro) { 1150da6c28aaSamw err = fzap_remove(zn, tx); 1151fa9e4066Sahrens } else { 1152da6c28aaSamw mze = mze_find(zn); 1153fa9e4066Sahrens if (mze == NULL) { 1154be6fd75aSMatthew Ahrens err = SET_ERROR(ENOENT); 1155fa9e4066Sahrens } else { 1156fa9e4066Sahrens zap->zap_m.zap_num_entries--; 1157c1379625SJustin T. Gibbs bzero(&zap_m_phys(zap)->mz_chunk[mze->mze_chunkid], 1158fa9e4066Sahrens sizeof (mzap_ent_phys_t)); 1159fa9e4066Sahrens mze_remove(zap, mze); 1160fa9e4066Sahrens } 1161fa9e4066Sahrens } 1162da6c28aaSamw zap_name_free(zn); 1163fa9e4066Sahrens zap_unlockdir(zap); 1164fa9e4066Sahrens return (err); 1165fa9e4066Sahrens } 1166fa9e4066Sahrens 1167b24ab676SJeff Bonwick int 1168b24ab676SJeff Bonwick zap_remove_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, 1169b24ab676SJeff Bonwick int key_numints, dmu_tx_t *tx) 1170b24ab676SJeff Bonwick { 1171b24ab676SJeff Bonwick zap_t *zap; 1172b24ab676SJeff Bonwick int err; 1173b24ab676SJeff Bonwick zap_name_t *zn; 1174b24ab676SJeff Bonwick 1175b24ab676SJeff Bonwick err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, FALSE, &zap); 1176b24ab676SJeff Bonwick if (err) 1177b24ab676SJeff Bonwick return (err); 1178b24ab676SJeff Bonwick zn = zap_name_alloc_uint64(zap, key, key_numints); 1179b24ab676SJeff Bonwick if (zn == NULL) { 1180b24ab676SJeff Bonwick zap_unlockdir(zap); 1181be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 1182b24ab676SJeff Bonwick } 1183b24ab676SJeff Bonwick err = fzap_remove(zn, tx); 1184b24ab676SJeff Bonwick zap_name_free(zn); 1185b24ab676SJeff Bonwick zap_unlockdir(zap); 1186b24ab676SJeff Bonwick return (err); 1187b24ab676SJeff Bonwick } 1188b24ab676SJeff Bonwick 1189fa9e4066Sahrens /* 1190fa9e4066Sahrens * Routines for iterating over the attributes. 1191fa9e4066Sahrens */ 1192fa9e4066Sahrens 1193fa9e4066Sahrens void 1194fa9e4066Sahrens zap_cursor_init_serialized(zap_cursor_t *zc, objset_t *os, uint64_t zapobj, 1195fa9e4066Sahrens uint64_t serialized) 1196fa9e4066Sahrens { 1197fa9e4066Sahrens zc->zc_objset = os; 119887e5029aSahrens zc->zc_zap = NULL; 119987e5029aSahrens zc->zc_leaf = NULL; 1200fa9e4066Sahrens zc->zc_zapobj = zapobj; 1201b24ab676SJeff Bonwick zc->zc_serialized = serialized; 1202b24ab676SJeff Bonwick zc->zc_hash = 0; 1203b24ab676SJeff Bonwick zc->zc_cd = 0; 1204fa9e4066Sahrens } 1205fa9e4066Sahrens 120687e5029aSahrens void 120787e5029aSahrens zap_cursor_init(zap_cursor_t *zc, objset_t *os, uint64_t zapobj) 120887e5029aSahrens { 120987e5029aSahrens zap_cursor_init_serialized(zc, os, zapobj, 0); 121087e5029aSahrens } 121187e5029aSahrens 121287e5029aSahrens void 121387e5029aSahrens zap_cursor_fini(zap_cursor_t *zc) 121487e5029aSahrens { 121587e5029aSahrens if (zc->zc_zap) { 121687e5029aSahrens rw_enter(&zc->zc_zap->zap_rwlock, RW_READER); 121787e5029aSahrens zap_unlockdir(zc->zc_zap); 121887e5029aSahrens zc->zc_zap = NULL; 121987e5029aSahrens } 122087e5029aSahrens if (zc->zc_leaf) { 122187e5029aSahrens rw_enter(&zc->zc_leaf->l_rwlock, RW_READER); 122287e5029aSahrens zap_put_leaf(zc->zc_leaf); 122387e5029aSahrens zc->zc_leaf = NULL; 122487e5029aSahrens } 122587e5029aSahrens zc->zc_objset = NULL; 122687e5029aSahrens } 122787e5029aSahrens 1228fa9e4066Sahrens uint64_t 1229fa9e4066Sahrens zap_cursor_serialize(zap_cursor_t *zc) 1230fa9e4066Sahrens { 1231fa9e4066Sahrens if (zc->zc_hash == -1ULL) 1232fa9e4066Sahrens return (-1ULL); 1233b24ab676SJeff Bonwick if (zc->zc_zap == NULL) 1234b24ab676SJeff Bonwick return (zc->zc_serialized); 1235b24ab676SJeff Bonwick ASSERT((zc->zc_hash & zap_maxcd(zc->zc_zap)) == 0); 1236b24ab676SJeff Bonwick ASSERT(zc->zc_cd < zap_maxcd(zc->zc_zap)); 1237b24ab676SJeff Bonwick 1238b24ab676SJeff Bonwick /* 1239b24ab676SJeff Bonwick * We want to keep the high 32 bits of the cursor zero if we can, so 1240b24ab676SJeff Bonwick * that 32-bit programs can access this. So usually use a small 1241b24ab676SJeff Bonwick * (28-bit) hash value so we can fit 4 bits of cd into the low 32-bits 1242b24ab676SJeff Bonwick * of the cursor. 1243b24ab676SJeff Bonwick * 1244b24ab676SJeff Bonwick * [ collision differentiator | zap_hashbits()-bit hash value ] 1245b24ab676SJeff Bonwick */ 1246b24ab676SJeff Bonwick return ((zc->zc_hash >> (64 - zap_hashbits(zc->zc_zap))) | 1247b24ab676SJeff Bonwick ((uint64_t)zc->zc_cd << zap_hashbits(zc->zc_zap))); 1248fa9e4066Sahrens } 1249fa9e4066Sahrens 1250fa9e4066Sahrens int 1251fa9e4066Sahrens zap_cursor_retrieve(zap_cursor_t *zc, zap_attribute_t *za) 1252fa9e4066Sahrens { 1253fa9e4066Sahrens int err; 1254fa9e4066Sahrens avl_index_t idx; 1255fa9e4066Sahrens mzap_ent_t mze_tofind; 1256fa9e4066Sahrens mzap_ent_t *mze; 1257fa9e4066Sahrens 1258fa9e4066Sahrens if (zc->zc_hash == -1ULL) 1259be6fd75aSMatthew Ahrens return (SET_ERROR(ENOENT)); 1260fa9e4066Sahrens 126187e5029aSahrens if (zc->zc_zap == NULL) { 1262b24ab676SJeff Bonwick int hb; 126387e5029aSahrens err = zap_lockdir(zc->zc_objset, zc->zc_zapobj, NULL, 1264c5f9e431Sahrens RW_READER, TRUE, FALSE, &zc->zc_zap); 126587e5029aSahrens if (err) 126687e5029aSahrens return (err); 1267b24ab676SJeff Bonwick 1268b24ab676SJeff Bonwick /* 1269b24ab676SJeff Bonwick * To support zap_cursor_init_serialized, advance, retrieve, 1270b24ab676SJeff Bonwick * we must add to the existing zc_cd, which may already 1271b24ab676SJeff Bonwick * be 1 due to the zap_cursor_advance. 1272b24ab676SJeff Bonwick */ 1273b24ab676SJeff Bonwick ASSERT(zc->zc_hash == 0); 1274b24ab676SJeff Bonwick hb = zap_hashbits(zc->zc_zap); 1275b24ab676SJeff Bonwick zc->zc_hash = zc->zc_serialized << (64 - hb); 1276b24ab676SJeff Bonwick zc->zc_cd += zc->zc_serialized >> hb; 1277b24ab676SJeff Bonwick if (zc->zc_cd >= zap_maxcd(zc->zc_zap)) /* corrupt serialized */ 1278b24ab676SJeff Bonwick zc->zc_cd = 0; 127987e5029aSahrens } else { 128087e5029aSahrens rw_enter(&zc->zc_zap->zap_rwlock, RW_READER); 128187e5029aSahrens } 128287e5029aSahrens if (!zc->zc_zap->zap_ismicro) { 128387e5029aSahrens err = fzap_cursor_retrieve(zc->zc_zap, zc, za); 1284fa9e4066Sahrens } else { 1285fa9e4066Sahrens mze_tofind.mze_hash = zc->zc_hash; 12863f9d6ad7SLin Ling mze_tofind.mze_cd = zc->zc_cd; 1287fa9e4066Sahrens 128887e5029aSahrens mze = avl_find(&zc->zc_zap->zap_m.zap_avl, &mze_tofind, &idx); 128987e5029aSahrens if (mze == NULL) { 129087e5029aSahrens mze = avl_nearest(&zc->zc_zap->zap_m.zap_avl, 129187e5029aSahrens idx, AVL_AFTER); 129287e5029aSahrens } 1293fa9e4066Sahrens if (mze) { 12943f9d6ad7SLin Ling mzap_ent_phys_t *mzep = MZE_PHYS(zc->zc_zap, mze); 12953f9d6ad7SLin Ling ASSERT3U(mze->mze_cd, ==, mzep->mze_cd); 1296da6c28aaSamw za->za_normalization_conflict = 1297da6c28aaSamw mzap_normalization_conflict(zc->zc_zap, NULL, mze); 1298fa9e4066Sahrens za->za_integer_length = 8; 1299fa9e4066Sahrens za->za_num_integers = 1; 13003f9d6ad7SLin Ling za->za_first_integer = mzep->mze_value; 13013f9d6ad7SLin Ling (void) strcpy(za->za_name, mzep->mze_name); 1302fa9e4066Sahrens zc->zc_hash = mze->mze_hash; 13033f9d6ad7SLin Ling zc->zc_cd = mze->mze_cd; 1304fa9e4066Sahrens err = 0; 1305fa9e4066Sahrens } else { 1306fa9e4066Sahrens zc->zc_hash = -1ULL; 1307be6fd75aSMatthew Ahrens err = SET_ERROR(ENOENT); 1308fa9e4066Sahrens } 1309fa9e4066Sahrens } 131087e5029aSahrens rw_exit(&zc->zc_zap->zap_rwlock); 1311fa9e4066Sahrens return (err); 1312fa9e4066Sahrens } 1313fa9e4066Sahrens 1314fa9e4066Sahrens void 1315fa9e4066Sahrens zap_cursor_advance(zap_cursor_t *zc) 1316fa9e4066Sahrens { 1317fa9e4066Sahrens if (zc->zc_hash == -1ULL) 1318fa9e4066Sahrens return; 1319fa9e4066Sahrens zc->zc_cd++; 1320fa9e4066Sahrens } 1321fa9e4066Sahrens 1322fa9e4066Sahrens int 1323fa9e4066Sahrens zap_get_stats(objset_t *os, uint64_t zapobj, zap_stats_t *zs) 1324fa9e4066Sahrens { 1325fa9e4066Sahrens int err; 1326fa9e4066Sahrens zap_t *zap; 1327fa9e4066Sahrens 1328c5f9e431Sahrens err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); 1329fa9e4066Sahrens if (err) 1330fa9e4066Sahrens return (err); 1331fa9e4066Sahrens 1332fa9e4066Sahrens bzero(zs, sizeof (zap_stats_t)); 1333fa9e4066Sahrens 1334fa9e4066Sahrens if (zap->zap_ismicro) { 1335fa9e4066Sahrens zs->zs_blocksize = zap->zap_dbuf->db_size; 1336fa9e4066Sahrens zs->zs_num_entries = zap->zap_m.zap_num_entries; 1337fa9e4066Sahrens zs->zs_num_blocks = 1; 1338fa9e4066Sahrens } else { 1339fa9e4066Sahrens fzap_get_stats(zap, zs); 1340fa9e4066Sahrens } 1341fa9e4066Sahrens zap_unlockdir(zap); 1342fa9e4066Sahrens return (0); 1343fa9e4066Sahrens } 13443d692628SSanjeev Bagewadi 13453d692628SSanjeev Bagewadi int 13463d692628SSanjeev Bagewadi zap_count_write(objset_t *os, uint64_t zapobj, const char *name, int add, 1347720d1aa1SSanjeev Bagewadi uint64_t *towrite, uint64_t *tooverwrite) 13483d692628SSanjeev Bagewadi { 13493d692628SSanjeev Bagewadi zap_t *zap; 13503d692628SSanjeev Bagewadi int err = 0; 13513d692628SSanjeev Bagewadi 13523d692628SSanjeev Bagewadi /* 13533d692628SSanjeev Bagewadi * Since, we don't have a name, we cannot figure out which blocks will 13543d692628SSanjeev Bagewadi * be affected in this operation. So, account for the worst case : 13553d692628SSanjeev Bagewadi * - 3 blocks overwritten: target leaf, ptrtbl block, header block 13563d692628SSanjeev Bagewadi * - 4 new blocks written if adding: 13573d692628SSanjeev Bagewadi * - 2 blocks for possibly split leaves, 13583d692628SSanjeev Bagewadi * - 2 grown ptrtbl blocks 13593d692628SSanjeev Bagewadi * 13603d692628SSanjeev Bagewadi * This also accomodates the case where an add operation to a fairly 13613d692628SSanjeev Bagewadi * large microzap results in a promotion to fatzap. 13623d692628SSanjeev Bagewadi */ 13633d692628SSanjeev Bagewadi if (name == NULL) { 1364b5152584SMatthew Ahrens *towrite += (3 + (add ? 4 : 0)) * SPA_OLD_MAXBLOCKSIZE; 13653d692628SSanjeev Bagewadi return (err); 13663d692628SSanjeev Bagewadi } 13673d692628SSanjeev Bagewadi 13683d692628SSanjeev Bagewadi /* 136919b94df9SMatthew Ahrens * We lock the zap with adding == FALSE. Because, if we pass 13703d692628SSanjeev Bagewadi * the actual value of add, it could trigger a mzap_upgrade(). 13713d692628SSanjeev Bagewadi * At present we are just evaluating the possibility of this operation 13723d692628SSanjeev Bagewadi * and hence we donot want to trigger an upgrade. 13733d692628SSanjeev Bagewadi */ 13743d692628SSanjeev Bagewadi err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); 13753d692628SSanjeev Bagewadi if (err) 13763d692628SSanjeev Bagewadi return (err); 13773d692628SSanjeev Bagewadi 13783d692628SSanjeev Bagewadi if (!zap->zap_ismicro) { 13793d692628SSanjeev Bagewadi zap_name_t *zn = zap_name_alloc(zap, name, MT_EXACT); 13803d692628SSanjeev Bagewadi if (zn) { 13813d692628SSanjeev Bagewadi err = fzap_count_write(zn, add, towrite, 13823d692628SSanjeev Bagewadi tooverwrite); 13833d692628SSanjeev Bagewadi zap_name_free(zn); 13843d692628SSanjeev Bagewadi } else { 13853d692628SSanjeev Bagewadi /* 13863d692628SSanjeev Bagewadi * We treat this case as similar to (name == NULL) 13873d692628SSanjeev Bagewadi */ 1388b5152584SMatthew Ahrens *towrite += (3 + (add ? 4 : 0)) * SPA_OLD_MAXBLOCKSIZE; 13893d692628SSanjeev Bagewadi } 13903d692628SSanjeev Bagewadi } else { 1391720d1aa1SSanjeev Bagewadi /* 1392720d1aa1SSanjeev Bagewadi * We are here if (name != NULL) and this is a micro-zap. 1393720d1aa1SSanjeev Bagewadi * We account for the header block depending on whether it 1394720d1aa1SSanjeev Bagewadi * is freeable. 1395720d1aa1SSanjeev Bagewadi * 1396720d1aa1SSanjeev Bagewadi * Incase of an add-operation it is hard to find out 1397720d1aa1SSanjeev Bagewadi * if this add will promote this microzap to fatzap. 1398720d1aa1SSanjeev Bagewadi * Hence, we consider the worst case and account for the 1399720d1aa1SSanjeev Bagewadi * blocks assuming this microzap would be promoted to a 1400720d1aa1SSanjeev Bagewadi * fatzap. 1401720d1aa1SSanjeev Bagewadi * 1402720d1aa1SSanjeev Bagewadi * 1 block overwritten : header block 1403720d1aa1SSanjeev Bagewadi * 4 new blocks written : 2 new split leaf, 2 grown 1404720d1aa1SSanjeev Bagewadi * ptrtbl blocks 1405720d1aa1SSanjeev Bagewadi */ 1406720d1aa1SSanjeev Bagewadi if (dmu_buf_freeable(zap->zap_dbuf)) 1407b5152584SMatthew Ahrens *tooverwrite += MZAP_MAX_BLKSZ; 1408720d1aa1SSanjeev Bagewadi else 1409b5152584SMatthew Ahrens *towrite += MZAP_MAX_BLKSZ; 1410720d1aa1SSanjeev Bagewadi 1411720d1aa1SSanjeev Bagewadi if (add) { 1412b5152584SMatthew Ahrens *towrite += 4 * MZAP_MAX_BLKSZ; 14133d692628SSanjeev Bagewadi } 14143d692628SSanjeev Bagewadi } 14153d692628SSanjeev Bagewadi 14163d692628SSanjeev Bagewadi zap_unlockdir(zap); 14173d692628SSanjeev Bagewadi return (err); 14183d692628SSanjeev Bagewadi } 1419