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 */ 21*1c17160aSKevin Crowe 22fa9e4066Sahrens /* 2347cb52daSJeff Bonwick * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 24ae972795SMatthew Ahrens * Copyright (c) 2011, 2016 by Delphix. All rights reserved. 25bc9014e6SJustin Gibbs * Copyright (c) 2014 Spectra Logic Corporation, All rights reserved. 26c3d26abcSMatthew Ahrens * Copyright (c) 2014 Integros [integros.com] 27*1c17160aSKevin Crowe * Copyright 2017 Nexenta Systems, Inc. 28fa9e4066Sahrens */ 29fa9e4066Sahrens 30b24ab676SJeff Bonwick #include <sys/zio.h> 31fa9e4066Sahrens #include <sys/spa.h> 32fa9e4066Sahrens #include <sys/dmu.h> 33fa9e4066Sahrens #include <sys/zfs_context.h> 34fa9e4066Sahrens #include <sys/zap.h> 35ea8dc4b6Seschrock #include <sys/refcount.h> 36fa9e4066Sahrens #include <sys/zap_impl.h> 3787e5029aSahrens #include <sys/zap_leaf.h> 38fa9e4066Sahrens #include <sys/avl.h> 393f9d6ad7SLin Ling #include <sys/arc.h> 40b5152584SMatthew Ahrens #include <sys/dmu_objset.h> 41de8267e0Stimh 42de8267e0Stimh #ifdef _KERNEL 43de8267e0Stimh #include <sys/sunddi.h> 44de8267e0Stimh #endif 45fa9e4066Sahrens 46c1379625SJustin T. Gibbs extern inline mzap_phys_t *zap_m_phys(zap_t *zap); 47c1379625SJustin T. Gibbs 48ae972795SMatthew Ahrens static int mzap_upgrade(zap_t **zapp, 49ae972795SMatthew Ahrens void *tag, dmu_tx_t *tx, zap_flags_t flags); 50fa9e4066Sahrens 51b24ab676SJeff Bonwick uint64_t 52b24ab676SJeff Bonwick zap_getflags(zap_t *zap) 53b24ab676SJeff Bonwick { 54b24ab676SJeff Bonwick if (zap->zap_ismicro) 55b24ab676SJeff Bonwick return (0); 56c1379625SJustin T. Gibbs return (zap_f_phys(zap)->zap_flags); 57b24ab676SJeff Bonwick } 58b24ab676SJeff Bonwick 59b24ab676SJeff Bonwick int 60b24ab676SJeff Bonwick zap_hashbits(zap_t *zap) 61b24ab676SJeff Bonwick { 62b24ab676SJeff Bonwick if (zap_getflags(zap) & ZAP_FLAG_HASH64) 63b24ab676SJeff Bonwick return (48); 64b24ab676SJeff Bonwick else 65b24ab676SJeff Bonwick return (28); 66b24ab676SJeff Bonwick } 67b24ab676SJeff Bonwick 68b24ab676SJeff Bonwick uint32_t 69b24ab676SJeff Bonwick zap_maxcd(zap_t *zap) 70b24ab676SJeff Bonwick { 71b24ab676SJeff Bonwick if (zap_getflags(zap) & ZAP_FLAG_HASH64) 72b24ab676SJeff Bonwick return ((1<<16)-1); 73b24ab676SJeff Bonwick else 74b24ab676SJeff Bonwick return (-1U); 75b24ab676SJeff Bonwick } 76fa9e4066Sahrens 77da6c28aaSamw static uint64_t 78b24ab676SJeff Bonwick zap_hash(zap_name_t *zn) 79da6c28aaSamw { 80b24ab676SJeff Bonwick zap_t *zap = zn->zn_zap; 81b24ab676SJeff Bonwick uint64_t h = 0; 82da6c28aaSamw 83b24ab676SJeff Bonwick if (zap_getflags(zap) & ZAP_FLAG_PRE_HASHED_KEY) { 84b24ab676SJeff Bonwick ASSERT(zap_getflags(zap) & ZAP_FLAG_UINT64_KEY); 85b24ab676SJeff Bonwick h = *(uint64_t *)zn->zn_key_orig; 86b24ab676SJeff Bonwick } else { 87b24ab676SJeff Bonwick h = zap->zap_salt; 88b24ab676SJeff Bonwick ASSERT(h != 0); 89b24ab676SJeff Bonwick ASSERT(zfs_crc64_table[128] == ZFS_CRC64_POLY); 90b24ab676SJeff Bonwick 91486ae710SMatthew Ahrens if (zap_getflags(zap) & ZAP_FLAG_UINT64_KEY) { 92486ae710SMatthew Ahrens int i; 93486ae710SMatthew Ahrens const uint64_t *wp = zn->zn_key_norm; 94486ae710SMatthew Ahrens 95486ae710SMatthew Ahrens ASSERT(zn->zn_key_intlen == 8); 96486ae710SMatthew Ahrens for (i = 0; i < zn->zn_key_norm_numints; wp++, i++) { 97486ae710SMatthew Ahrens int j; 98486ae710SMatthew Ahrens uint64_t word = *wp; 99486ae710SMatthew Ahrens 100486ae710SMatthew Ahrens for (j = 0; j < zn->zn_key_intlen; j++) { 101486ae710SMatthew Ahrens h = (h >> 8) ^ 102486ae710SMatthew Ahrens zfs_crc64_table[(h ^ word) & 0xFF]; 103486ae710SMatthew Ahrens word >>= NBBY; 104486ae710SMatthew Ahrens } 105486ae710SMatthew Ahrens } 106486ae710SMatthew Ahrens } else { 107486ae710SMatthew Ahrens int i, len; 108486ae710SMatthew Ahrens const uint8_t *cp = zn->zn_key_norm; 109486ae710SMatthew Ahrens 110486ae710SMatthew Ahrens /* 111486ae710SMatthew Ahrens * We previously stored the terminating null on 112486ae710SMatthew Ahrens * disk, but didn't hash it, so we need to 113486ae710SMatthew Ahrens * continue to not hash it. (The 114486ae710SMatthew Ahrens * zn_key_*_numints includes the terminating 115486ae710SMatthew Ahrens * null for non-binary keys.) 116486ae710SMatthew Ahrens */ 117486ae710SMatthew Ahrens len = zn->zn_key_norm_numints - 1; 118486ae710SMatthew Ahrens 119486ae710SMatthew Ahrens ASSERT(zn->zn_key_intlen == 1); 120486ae710SMatthew Ahrens for (i = 0; i < len; cp++, i++) { 121486ae710SMatthew Ahrens h = (h >> 8) ^ 122486ae710SMatthew Ahrens zfs_crc64_table[(h ^ *cp) & 0xFF]; 123486ae710SMatthew Ahrens } 124486ae710SMatthew Ahrens } 125b24ab676SJeff Bonwick } 126da6c28aaSamw /* 127b24ab676SJeff Bonwick * Don't use all 64 bits, since we need some in the cookie for 128b24ab676SJeff Bonwick * the collision differentiator. We MUST use the high bits, 129b24ab676SJeff Bonwick * since those are the ones that we first pay attention to when 130da6c28aaSamw * chosing the bucket. 131da6c28aaSamw */ 132b24ab676SJeff Bonwick h &= ~((1ULL << (64 - zap_hashbits(zap))) - 1); 133da6c28aaSamw 134b24ab676SJeff Bonwick return (h); 135da6c28aaSamw } 136da6c28aaSamw 137da6c28aaSamw static int 138*1c17160aSKevin Crowe zap_normalize(zap_t *zap, const char *name, char *namenorm, int normflags) 139da6c28aaSamw { 140da6c28aaSamw size_t inlen, outlen; 141da6c28aaSamw int err; 142da6c28aaSamw 143b24ab676SJeff Bonwick ASSERT(!(zap_getflags(zap) & ZAP_FLAG_UINT64_KEY)); 144b24ab676SJeff Bonwick 145da6c28aaSamw inlen = strlen(name) + 1; 146da6c28aaSamw outlen = ZAP_MAXNAMELEN; 147da6c28aaSamw 148da6c28aaSamw err = 0; 149da6c28aaSamw (void) u8_textprep_str((char *)name, &inlen, namenorm, &outlen, 150*1c17160aSKevin Crowe normflags | U8_TEXTPREP_IGNORE_NULL | U8_TEXTPREP_IGNORE_INVALID, 151*1c17160aSKevin Crowe U8_UNICODE_LATEST, &err); 152da6c28aaSamw 153da6c28aaSamw return (err); 154da6c28aaSamw } 155da6c28aaSamw 156da6c28aaSamw boolean_t 157da6c28aaSamw zap_match(zap_name_t *zn, const char *matchname) 158da6c28aaSamw { 159b24ab676SJeff Bonwick ASSERT(!(zap_getflags(zn->zn_zap) & ZAP_FLAG_UINT64_KEY)); 160b24ab676SJeff Bonwick 161*1c17160aSKevin Crowe if (zn->zn_matchtype & MT_NORMALIZE) { 162da6c28aaSamw char norm[ZAP_MAXNAMELEN]; 163da6c28aaSamw 164*1c17160aSKevin Crowe if (zap_normalize(zn->zn_zap, matchname, norm, 165*1c17160aSKevin Crowe zn->zn_normflags) != 0) 166da6c28aaSamw return (B_FALSE); 167da6c28aaSamw 168b24ab676SJeff Bonwick return (strcmp(zn->zn_key_norm, norm) == 0); 169da6c28aaSamw } else { 170b24ab676SJeff Bonwick return (strcmp(zn->zn_key_orig, matchname) == 0); 171da6c28aaSamw } 172da6c28aaSamw } 173da6c28aaSamw 174da6c28aaSamw void 175da6c28aaSamw zap_name_free(zap_name_t *zn) 176da6c28aaSamw { 177da6c28aaSamw kmem_free(zn, sizeof (zap_name_t)); 178da6c28aaSamw } 179da6c28aaSamw 180da6c28aaSamw zap_name_t * 181b24ab676SJeff Bonwick zap_name_alloc(zap_t *zap, const char *key, matchtype_t mt) 182da6c28aaSamw { 183da6c28aaSamw zap_name_t *zn = kmem_alloc(sizeof (zap_name_t), KM_SLEEP); 184da6c28aaSamw 185da6c28aaSamw zn->zn_zap = zap; 186b24ab676SJeff Bonwick zn->zn_key_intlen = sizeof (*key); 187b24ab676SJeff Bonwick zn->zn_key_orig = key; 188486ae710SMatthew Ahrens zn->zn_key_orig_numints = strlen(zn->zn_key_orig) + 1; 189da6c28aaSamw zn->zn_matchtype = mt; 190*1c17160aSKevin Crowe zn->zn_normflags = zap->zap_normflags; 191*1c17160aSKevin Crowe 192*1c17160aSKevin Crowe /* 193*1c17160aSKevin Crowe * If we're dealing with a case sensitive lookup on a mixed or 194*1c17160aSKevin Crowe * insensitive fs, remove U8_TEXTPREP_TOUPPER or the lookup 195*1c17160aSKevin Crowe * will fold case to all caps overriding the lookup request. 196*1c17160aSKevin Crowe */ 197*1c17160aSKevin Crowe if (mt & MT_MATCH_CASE) 198*1c17160aSKevin Crowe zn->zn_normflags &= ~U8_TEXTPREP_TOUPPER; 199*1c17160aSKevin Crowe 200da6c28aaSamw if (zap->zap_normflags) { 201*1c17160aSKevin Crowe /* 202*1c17160aSKevin Crowe * We *must* use zap_normflags because this normalization is 203*1c17160aSKevin Crowe * what the hash is computed from. 204*1c17160aSKevin Crowe */ 205*1c17160aSKevin Crowe if (zap_normalize(zap, key, zn->zn_normbuf, 206*1c17160aSKevin Crowe zap->zap_normflags) != 0) { 207da6c28aaSamw zap_name_free(zn); 208da6c28aaSamw return (NULL); 209da6c28aaSamw } 210b24ab676SJeff Bonwick zn->zn_key_norm = zn->zn_normbuf; 211486ae710SMatthew Ahrens zn->zn_key_norm_numints = strlen(zn->zn_key_norm) + 1; 212da6c28aaSamw } else { 213*1c17160aSKevin Crowe if (mt != 0) { 214da6c28aaSamw zap_name_free(zn); 215da6c28aaSamw return (NULL); 216da6c28aaSamw } 217b24ab676SJeff Bonwick zn->zn_key_norm = zn->zn_key_orig; 218486ae710SMatthew Ahrens zn->zn_key_norm_numints = zn->zn_key_orig_numints; 219da6c28aaSamw } 220da6c28aaSamw 221b24ab676SJeff Bonwick zn->zn_hash = zap_hash(zn); 222*1c17160aSKevin Crowe 223*1c17160aSKevin Crowe if (zap->zap_normflags != zn->zn_normflags) { 224*1c17160aSKevin Crowe /* 225*1c17160aSKevin Crowe * We *must* use zn_normflags because this normalization is 226*1c17160aSKevin Crowe * what the matching is based on. (Not the hash!) 227*1c17160aSKevin Crowe */ 228*1c17160aSKevin Crowe if (zap_normalize(zap, key, zn->zn_normbuf, 229*1c17160aSKevin Crowe zn->zn_normflags) != 0) { 230*1c17160aSKevin Crowe zap_name_free(zn); 231*1c17160aSKevin Crowe return (NULL); 232*1c17160aSKevin Crowe } 233*1c17160aSKevin Crowe zn->zn_key_norm_numints = strlen(zn->zn_key_norm) + 1; 234*1c17160aSKevin Crowe } 235*1c17160aSKevin Crowe 236b24ab676SJeff Bonwick return (zn); 237b24ab676SJeff Bonwick } 238b24ab676SJeff Bonwick 239b24ab676SJeff Bonwick zap_name_t * 240b24ab676SJeff Bonwick zap_name_alloc_uint64(zap_t *zap, const uint64_t *key, int numints) 241b24ab676SJeff Bonwick { 242b24ab676SJeff Bonwick zap_name_t *zn = kmem_alloc(sizeof (zap_name_t), KM_SLEEP); 243b24ab676SJeff Bonwick 244b24ab676SJeff Bonwick ASSERT(zap->zap_normflags == 0); 245b24ab676SJeff Bonwick zn->zn_zap = zap; 246b24ab676SJeff Bonwick zn->zn_key_intlen = sizeof (*key); 247b24ab676SJeff Bonwick zn->zn_key_orig = zn->zn_key_norm = key; 248486ae710SMatthew Ahrens zn->zn_key_orig_numints = zn->zn_key_norm_numints = numints; 249*1c17160aSKevin Crowe zn->zn_matchtype = 0; 250b24ab676SJeff Bonwick 251b24ab676SJeff Bonwick zn->zn_hash = zap_hash(zn); 252da6c28aaSamw return (zn); 253da6c28aaSamw } 254da6c28aaSamw 255fa9e4066Sahrens static void 256fa9e4066Sahrens mzap_byteswap(mzap_phys_t *buf, size_t size) 257fa9e4066Sahrens { 258fa9e4066Sahrens int i, max; 259fa9e4066Sahrens buf->mz_block_type = BSWAP_64(buf->mz_block_type); 260fa9e4066Sahrens buf->mz_salt = BSWAP_64(buf->mz_salt); 261ab04eb8eStimh buf->mz_normflags = BSWAP_64(buf->mz_normflags); 262fa9e4066Sahrens max = (size / MZAP_ENT_LEN) - 1; 263fa9e4066Sahrens for (i = 0; i < max; i++) { 264fa9e4066Sahrens buf->mz_chunk[i].mze_value = 265fa9e4066Sahrens BSWAP_64(buf->mz_chunk[i].mze_value); 266fa9e4066Sahrens buf->mz_chunk[i].mze_cd = 267fa9e4066Sahrens BSWAP_32(buf->mz_chunk[i].mze_cd); 268fa9e4066Sahrens } 269fa9e4066Sahrens } 270fa9e4066Sahrens 271fa9e4066Sahrens void 272fa9e4066Sahrens zap_byteswap(void *buf, size_t size) 273fa9e4066Sahrens { 274fa9e4066Sahrens uint64_t block_type; 275fa9e4066Sahrens 276fa9e4066Sahrens block_type = *(uint64_t *)buf; 277fa9e4066Sahrens 2785ad82045Snd if (block_type == ZBT_MICRO || block_type == BSWAP_64(ZBT_MICRO)) { 279fa9e4066Sahrens /* ASSERT(magic == ZAP_LEAF_MAGIC); */ 280fa9e4066Sahrens mzap_byteswap(buf, size); 2815ad82045Snd } else { 282fa9e4066Sahrens fzap_byteswap(buf, size); 283fa9e4066Sahrens } 284fa9e4066Sahrens } 285fa9e4066Sahrens 286fa9e4066Sahrens static int 287fa9e4066Sahrens mze_compare(const void *arg1, const void *arg2) 288fa9e4066Sahrens { 289fa9e4066Sahrens const mzap_ent_t *mze1 = arg1; 290fa9e4066Sahrens const mzap_ent_t *mze2 = arg2; 291fa9e4066Sahrens 292fa9e4066Sahrens if (mze1->mze_hash > mze2->mze_hash) 293fa9e4066Sahrens return (+1); 294fa9e4066Sahrens if (mze1->mze_hash < mze2->mze_hash) 295fa9e4066Sahrens return (-1); 2963f9d6ad7SLin Ling if (mze1->mze_cd > mze2->mze_cd) 297fa9e4066Sahrens return (+1); 2983f9d6ad7SLin Ling if (mze1->mze_cd < mze2->mze_cd) 299fa9e4066Sahrens return (-1); 300fa9e4066Sahrens return (0); 301fa9e4066Sahrens } 302fa9e4066Sahrens 303fa9e4066Sahrens static void 3043f9d6ad7SLin Ling mze_insert(zap_t *zap, int chunkid, uint64_t hash) 305fa9e4066Sahrens { 306fa9e4066Sahrens mzap_ent_t *mze; 307fa9e4066Sahrens 308fa9e4066Sahrens ASSERT(zap->zap_ismicro); 309fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 310fa9e4066Sahrens 311fa9e4066Sahrens mze = kmem_alloc(sizeof (mzap_ent_t), KM_SLEEP); 312fa9e4066Sahrens mze->mze_chunkid = chunkid; 313fa9e4066Sahrens mze->mze_hash = hash; 3143f9d6ad7SLin Ling mze->mze_cd = MZE_PHYS(zap, mze)->mze_cd; 3153f9d6ad7SLin Ling ASSERT(MZE_PHYS(zap, mze)->mze_name[0] != 0); 316fa9e4066Sahrens avl_add(&zap->zap_m.zap_avl, mze); 317fa9e4066Sahrens } 318fa9e4066Sahrens 319fa9e4066Sahrens static mzap_ent_t * 320da6c28aaSamw mze_find(zap_name_t *zn) 321fa9e4066Sahrens { 322fa9e4066Sahrens mzap_ent_t mze_tofind; 323fa9e4066Sahrens mzap_ent_t *mze; 324fa9e4066Sahrens avl_index_t idx; 325da6c28aaSamw avl_tree_t *avl = &zn->zn_zap->zap_m.zap_avl; 326fa9e4066Sahrens 327da6c28aaSamw ASSERT(zn->zn_zap->zap_ismicro); 328da6c28aaSamw ASSERT(RW_LOCK_HELD(&zn->zn_zap->zap_rwlock)); 329fa9e4066Sahrens 330da6c28aaSamw mze_tofind.mze_hash = zn->zn_hash; 3313f9d6ad7SLin Ling mze_tofind.mze_cd = 0; 332fa9e4066Sahrens 333fa9e4066Sahrens mze = avl_find(avl, &mze_tofind, &idx); 334fa9e4066Sahrens if (mze == NULL) 335fa9e4066Sahrens mze = avl_nearest(avl, idx, AVL_AFTER); 336da6c28aaSamw for (; mze && mze->mze_hash == zn->zn_hash; mze = AVL_NEXT(avl, mze)) { 3373f9d6ad7SLin Ling ASSERT3U(mze->mze_cd, ==, MZE_PHYS(zn->zn_zap, mze)->mze_cd); 3383f9d6ad7SLin Ling if (zap_match(zn, MZE_PHYS(zn->zn_zap, mze)->mze_name)) 339fa9e4066Sahrens return (mze); 340fa9e4066Sahrens } 341*1c17160aSKevin Crowe 342fa9e4066Sahrens return (NULL); 343fa9e4066Sahrens } 344fa9e4066Sahrens 345fa9e4066Sahrens static uint32_t 346fa9e4066Sahrens mze_find_unused_cd(zap_t *zap, uint64_t hash) 347fa9e4066Sahrens { 348fa9e4066Sahrens mzap_ent_t mze_tofind; 349fa9e4066Sahrens mzap_ent_t *mze; 350fa9e4066Sahrens avl_index_t idx; 351fa9e4066Sahrens avl_tree_t *avl = &zap->zap_m.zap_avl; 352fa9e4066Sahrens uint32_t cd; 353fa9e4066Sahrens 354fa9e4066Sahrens ASSERT(zap->zap_ismicro); 355fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 356fa9e4066Sahrens 357fa9e4066Sahrens mze_tofind.mze_hash = hash; 3583f9d6ad7SLin Ling mze_tofind.mze_cd = 0; 359fa9e4066Sahrens 360fa9e4066Sahrens cd = 0; 361fa9e4066Sahrens for (mze = avl_find(avl, &mze_tofind, &idx); 362fa9e4066Sahrens mze && mze->mze_hash == hash; mze = AVL_NEXT(avl, mze)) { 3633f9d6ad7SLin Ling if (mze->mze_cd != cd) 364fa9e4066Sahrens break; 365fa9e4066Sahrens cd++; 366fa9e4066Sahrens } 367fa9e4066Sahrens 368fa9e4066Sahrens return (cd); 369fa9e4066Sahrens } 370fa9e4066Sahrens 371fa9e4066Sahrens static void 372fa9e4066Sahrens mze_remove(zap_t *zap, mzap_ent_t *mze) 373fa9e4066Sahrens { 374fa9e4066Sahrens ASSERT(zap->zap_ismicro); 375fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 376fa9e4066Sahrens 377fa9e4066Sahrens avl_remove(&zap->zap_m.zap_avl, mze); 378fa9e4066Sahrens kmem_free(mze, sizeof (mzap_ent_t)); 379fa9e4066Sahrens } 380fa9e4066Sahrens 381fa9e4066Sahrens static void 382fa9e4066Sahrens mze_destroy(zap_t *zap) 383fa9e4066Sahrens { 384fa9e4066Sahrens mzap_ent_t *mze; 385fa9e4066Sahrens void *avlcookie = NULL; 386fa9e4066Sahrens 387fa9e4066Sahrens while (mze = avl_destroy_nodes(&zap->zap_m.zap_avl, &avlcookie)) 388fa9e4066Sahrens kmem_free(mze, sizeof (mzap_ent_t)); 389fa9e4066Sahrens avl_destroy(&zap->zap_m.zap_avl); 390fa9e4066Sahrens } 391fa9e4066Sahrens 392fa9e4066Sahrens static zap_t * 393fa9e4066Sahrens mzap_open(objset_t *os, uint64_t obj, dmu_buf_t *db) 394fa9e4066Sahrens { 395fa9e4066Sahrens zap_t *winner; 396fa9e4066Sahrens zap_t *zap; 397fa9e4066Sahrens int i; 39802525cd0SChunwei Chen uint64_t *zap_hdr = (uint64_t *)db->db_data; 39902525cd0SChunwei Chen uint64_t zap_block_type = zap_hdr[0]; 40002525cd0SChunwei Chen uint64_t zap_magic = zap_hdr[1]; 401fa9e4066Sahrens 402fa9e4066Sahrens ASSERT3U(MZAP_ENT_LEN, ==, sizeof (mzap_ent_phys_t)); 403fa9e4066Sahrens 404fa9e4066Sahrens zap = kmem_zalloc(sizeof (zap_t), KM_SLEEP); 405fa9e4066Sahrens rw_init(&zap->zap_rwlock, 0, 0, 0); 406fa9e4066Sahrens rw_enter(&zap->zap_rwlock, RW_WRITER); 407fa9e4066Sahrens zap->zap_objset = os; 408fa9e4066Sahrens zap->zap_object = obj; 409fa9e4066Sahrens zap->zap_dbuf = db; 410fa9e4066Sahrens 41102525cd0SChunwei Chen if (zap_block_type != ZBT_MICRO) { 412fa9e4066Sahrens mutex_init(&zap->zap_f.zap_num_entries_mtx, 0, 0, 0); 413bf16b11eSMatthew Ahrens zap->zap_f.zap_block_shift = highbit64(db->db_size) - 1; 41402525cd0SChunwei Chen if (zap_block_type != ZBT_HEADER || zap_magic != ZAP_MAGIC) { 41502525cd0SChunwei Chen winner = NULL; /* No actual winner here... */ 41602525cd0SChunwei Chen goto handle_winner; 41702525cd0SChunwei Chen } 418fa9e4066Sahrens } else { 419fa9e4066Sahrens zap->zap_ismicro = TRUE; 420fa9e4066Sahrens } 421fa9e4066Sahrens 422fa9e4066Sahrens /* 423fa9e4066Sahrens * Make sure that zap_ismicro is set before we let others see 424fa9e4066Sahrens * it, because zap_lockdir() checks zap_ismicro without the lock 425fa9e4066Sahrens * held. 426fa9e4066Sahrens */ 42740510e8eSJosef 'Jeff' Sipek dmu_buf_init_user(&zap->zap_dbu, zap_evict_sync, NULL, &zap->zap_dbuf); 428bc9014e6SJustin Gibbs winner = dmu_buf_set_user(db, &zap->zap_dbu); 429fa9e4066Sahrens 43002525cd0SChunwei Chen if (winner != NULL) 43102525cd0SChunwei Chen goto handle_winner; 432fa9e4066Sahrens 433fa9e4066Sahrens if (zap->zap_ismicro) { 434c1379625SJustin T. Gibbs zap->zap_salt = zap_m_phys(zap)->mz_salt; 435c1379625SJustin T. Gibbs zap->zap_normflags = zap_m_phys(zap)->mz_normflags; 436fa9e4066Sahrens zap->zap_m.zap_num_chunks = db->db_size / MZAP_ENT_LEN - 1; 437fa9e4066Sahrens avl_create(&zap->zap_m.zap_avl, mze_compare, 438fa9e4066Sahrens sizeof (mzap_ent_t), offsetof(mzap_ent_t, mze_node)); 439fa9e4066Sahrens 440fa9e4066Sahrens for (i = 0; i < zap->zap_m.zap_num_chunks; i++) { 441fa9e4066Sahrens mzap_ent_phys_t *mze = 442c1379625SJustin T. Gibbs &zap_m_phys(zap)->mz_chunk[i]; 443fa9e4066Sahrens if (mze->mze_name[0]) { 444da6c28aaSamw zap_name_t *zn; 445da6c28aaSamw 446fa9e4066Sahrens zap->zap_m.zap_num_entries++; 447*1c17160aSKevin Crowe zn = zap_name_alloc(zap, mze->mze_name, 0); 4483f9d6ad7SLin Ling mze_insert(zap, i, zn->zn_hash); 449da6c28aaSamw zap_name_free(zn); 450fa9e4066Sahrens } 451fa9e4066Sahrens } 452fa9e4066Sahrens } else { 453c1379625SJustin T. Gibbs zap->zap_salt = zap_f_phys(zap)->zap_salt; 454c1379625SJustin T. Gibbs zap->zap_normflags = zap_f_phys(zap)->zap_normflags; 455f65e61c0Sahrens 456f65e61c0Sahrens ASSERT3U(sizeof (struct zap_leaf_header), ==, 457f65e61c0Sahrens 2*ZAP_LEAF_CHUNKSIZE); 458f65e61c0Sahrens 459f65e61c0Sahrens /* 460f65e61c0Sahrens * The embedded pointer table should not overlap the 461f65e61c0Sahrens * other members. 462f65e61c0Sahrens */ 463f65e61c0Sahrens ASSERT3P(&ZAP_EMBEDDED_PTRTBL_ENT(zap, 0), >, 464c1379625SJustin T. Gibbs &zap_f_phys(zap)->zap_salt); 465f65e61c0Sahrens 466f65e61c0Sahrens /* 467f65e61c0Sahrens * The embedded pointer table should end at the end of 468f65e61c0Sahrens * the block 469f65e61c0Sahrens */ 470f65e61c0Sahrens ASSERT3U((uintptr_t)&ZAP_EMBEDDED_PTRTBL_ENT(zap, 471f65e61c0Sahrens 1<<ZAP_EMBEDDED_PTRTBL_SHIFT(zap)) - 472c1379625SJustin T. Gibbs (uintptr_t)zap_f_phys(zap), ==, 473f65e61c0Sahrens zap->zap_dbuf->db_size); 474fa9e4066Sahrens } 475fa9e4066Sahrens rw_exit(&zap->zap_rwlock); 476fa9e4066Sahrens return (zap); 47702525cd0SChunwei Chen 47802525cd0SChunwei Chen handle_winner: 47902525cd0SChunwei Chen rw_exit(&zap->zap_rwlock); 48002525cd0SChunwei Chen rw_destroy(&zap->zap_rwlock); 48102525cd0SChunwei Chen if (!zap->zap_ismicro) 48202525cd0SChunwei Chen mutex_destroy(&zap->zap_f.zap_num_entries_mtx); 48302525cd0SChunwei Chen kmem_free(zap, sizeof (zap_t)); 48402525cd0SChunwei Chen return (winner); 485fa9e4066Sahrens } 486fa9e4066Sahrens 487ae972795SMatthew Ahrens static int 488ae972795SMatthew Ahrens zap_lockdir_impl(dmu_buf_t *db, void *tag, dmu_tx_t *tx, 489c5f9e431Sahrens krw_t lti, boolean_t fatreader, boolean_t adding, zap_t **zapp) 490fa9e4066Sahrens { 491fa9e4066Sahrens zap_t *zap; 492fa9e4066Sahrens krw_t lt; 493fa9e4066Sahrens 494ae972795SMatthew Ahrens ASSERT0(db->db_offset); 495ae972795SMatthew Ahrens objset_t *os = dmu_buf_get_objset(db); 496ae972795SMatthew Ahrens uint64_t obj = db->db_object; 497fa9e4066Sahrens 498ae972795SMatthew Ahrens *zapp = NULL; 499fa9e4066Sahrens 500fa9e4066Sahrens #ifdef ZFS_DEBUG 501fa9e4066Sahrens { 502fa9e4066Sahrens dmu_object_info_t doi; 503fa9e4066Sahrens dmu_object_info_from_db(db, &doi); 504ad135b5dSChristopher Siden ASSERT3U(DMU_OT_BYTESWAP(doi.doi_type), ==, DMU_BSWAP_ZAP); 505fa9e4066Sahrens } 506fa9e4066Sahrens #endif 507fa9e4066Sahrens 508fa9e4066Sahrens zap = dmu_buf_get_user(db); 50902525cd0SChunwei Chen if (zap == NULL) { 510fa9e4066Sahrens zap = mzap_open(os, obj, db); 51102525cd0SChunwei Chen if (zap == NULL) { 51202525cd0SChunwei Chen /* 51302525cd0SChunwei Chen * mzap_open() didn't like what it saw on-disk. 51402525cd0SChunwei Chen * Check for corruption! 51502525cd0SChunwei Chen */ 51602525cd0SChunwei Chen return (SET_ERROR(EIO)); 51702525cd0SChunwei Chen } 51802525cd0SChunwei Chen } 519fa9e4066Sahrens 520fa9e4066Sahrens /* 521fa9e4066Sahrens * We're checking zap_ismicro without the lock held, in order to 522fa9e4066Sahrens * tell what type of lock we want. Once we have some sort of 523fa9e4066Sahrens * lock, see if it really is the right type. In practice this 524fa9e4066Sahrens * can only be different if it was upgraded from micro to fat, 525fa9e4066Sahrens * and micro wanted WRITER but fat only needs READER. 526fa9e4066Sahrens */ 527fa9e4066Sahrens lt = (!zap->zap_ismicro && fatreader) ? RW_READER : lti; 528fa9e4066Sahrens rw_enter(&zap->zap_rwlock, lt); 529fa9e4066Sahrens if (lt != ((!zap->zap_ismicro && fatreader) ? RW_READER : lti)) { 530fa9e4066Sahrens /* it was upgraded, now we only need reader */ 531fa9e4066Sahrens ASSERT(lt == RW_WRITER); 532fa9e4066Sahrens ASSERT(RW_READER == 533fa9e4066Sahrens (!zap->zap_ismicro && fatreader) ? RW_READER : lti); 534fa9e4066Sahrens rw_downgrade(&zap->zap_rwlock); 535fa9e4066Sahrens lt = RW_READER; 536fa9e4066Sahrens } 537fa9e4066Sahrens 538fa9e4066Sahrens zap->zap_objset = os; 539fa9e4066Sahrens 540fa9e4066Sahrens if (lt == RW_WRITER) 541fa9e4066Sahrens dmu_buf_will_dirty(db, tx); 542fa9e4066Sahrens 543fa9e4066Sahrens ASSERT3P(zap->zap_dbuf, ==, db); 544fa9e4066Sahrens 545fa9e4066Sahrens ASSERT(!zap->zap_ismicro || 546fa9e4066Sahrens zap->zap_m.zap_num_entries <= zap->zap_m.zap_num_chunks); 547c5f9e431Sahrens if (zap->zap_ismicro && tx && adding && 548fa9e4066Sahrens zap->zap_m.zap_num_entries == zap->zap_m.zap_num_chunks) { 549fa9e4066Sahrens uint64_t newsz = db->db_size + SPA_MINBLOCKSIZE; 550fa9e4066Sahrens if (newsz > MZAP_MAX_BLKSZ) { 551fa9e4066Sahrens dprintf("upgrading obj %llu: num_entries=%u\n", 552fa9e4066Sahrens obj, zap->zap_m.zap_num_entries); 553fa9e4066Sahrens *zapp = zap; 554ae972795SMatthew Ahrens int err = mzap_upgrade(zapp, tag, tx, 0); 555ae972795SMatthew Ahrens if (err != 0) 556ae972795SMatthew Ahrens rw_exit(&zap->zap_rwlock); 557ae972795SMatthew Ahrens return (err); 558fa9e4066Sahrens } 559ae972795SMatthew Ahrens VERIFY0(dmu_object_set_blocksize(os, obj, newsz, 0, tx)); 560fa9e4066Sahrens zap->zap_m.zap_num_chunks = 561fa9e4066Sahrens db->db_size / MZAP_ENT_LEN - 1; 562fa9e4066Sahrens } 563fa9e4066Sahrens 564fa9e4066Sahrens *zapp = zap; 565fa9e4066Sahrens return (0); 566fa9e4066Sahrens } 567fa9e4066Sahrens 56879d72832SMatthew Ahrens static int 56979d72832SMatthew Ahrens zap_lockdir_by_dnode(dnode_t *dn, dmu_tx_t *tx, 57079d72832SMatthew Ahrens krw_t lti, boolean_t fatreader, boolean_t adding, void *tag, zap_t **zapp) 57179d72832SMatthew Ahrens { 57279d72832SMatthew Ahrens dmu_buf_t *db; 57379d72832SMatthew Ahrens int err; 57479d72832SMatthew Ahrens 57579d72832SMatthew Ahrens err = dmu_buf_hold_by_dnode(dn, 0, tag, &db, DMU_READ_NO_PREFETCH); 57679d72832SMatthew Ahrens if (err != 0) { 57779d72832SMatthew Ahrens return (err); 57879d72832SMatthew Ahrens } 57979d72832SMatthew Ahrens err = zap_lockdir_impl(db, tag, tx, lti, fatreader, adding, zapp); 58079d72832SMatthew Ahrens if (err != 0) { 58179d72832SMatthew Ahrens dmu_buf_rele(db, tag); 58279d72832SMatthew Ahrens } 58379d72832SMatthew Ahrens return (err); 58479d72832SMatthew Ahrens } 58579d72832SMatthew Ahrens 586ae972795SMatthew Ahrens int 587ae972795SMatthew Ahrens zap_lockdir(objset_t *os, uint64_t obj, dmu_tx_t *tx, 588ae972795SMatthew Ahrens krw_t lti, boolean_t fatreader, boolean_t adding, void *tag, zap_t **zapp) 589ae972795SMatthew Ahrens { 590ae972795SMatthew Ahrens dmu_buf_t *db; 591ae972795SMatthew Ahrens int err; 592ae972795SMatthew Ahrens 593ae972795SMatthew Ahrens err = dmu_buf_hold(os, obj, 0, tag, &db, DMU_READ_NO_PREFETCH); 594ae972795SMatthew Ahrens if (err != 0) 595ae972795SMatthew Ahrens return (err); 596ae972795SMatthew Ahrens err = zap_lockdir_impl(db, tag, tx, lti, fatreader, adding, zapp); 597ae972795SMatthew Ahrens if (err != 0) 598ae972795SMatthew Ahrens dmu_buf_rele(db, tag); 599ae972795SMatthew Ahrens return (err); 600ae972795SMatthew Ahrens } 601ae972795SMatthew Ahrens 602fa9e4066Sahrens void 603ae972795SMatthew Ahrens zap_unlockdir(zap_t *zap, void *tag) 604fa9e4066Sahrens { 605fa9e4066Sahrens rw_exit(&zap->zap_rwlock); 606ae972795SMatthew Ahrens dmu_buf_rele(zap->zap_dbuf, tag); 607fa9e4066Sahrens } 608fa9e4066Sahrens 609ad860c82Sbonwick static int 610ae972795SMatthew Ahrens mzap_upgrade(zap_t **zapp, void *tag, dmu_tx_t *tx, zap_flags_t flags) 611fa9e4066Sahrens { 612fa9e4066Sahrens mzap_phys_t *mzp; 613b24ab676SJeff Bonwick int i, sz, nchunks; 614b24ab676SJeff Bonwick int err = 0; 615ad860c82Sbonwick zap_t *zap = *zapp; 616fa9e4066Sahrens 617fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 618fa9e4066Sahrens 619fa9e4066Sahrens sz = zap->zap_dbuf->db_size; 620be3e2ab9SBrian Behlendorf mzp = zio_buf_alloc(sz); 621fa9e4066Sahrens bcopy(zap->zap_dbuf->db_data, mzp, sz); 622fa9e4066Sahrens nchunks = zap->zap_m.zap_num_chunks; 623fa9e4066Sahrens 624b24ab676SJeff Bonwick if (!flags) { 625b24ab676SJeff Bonwick err = dmu_object_set_blocksize(zap->zap_objset, zap->zap_object, 626b24ab676SJeff Bonwick 1ULL << fzap_default_block_shift, 0, tx); 627b24ab676SJeff Bonwick if (err) { 628be3e2ab9SBrian Behlendorf zio_buf_free(mzp, sz); 629b24ab676SJeff Bonwick return (err); 630b24ab676SJeff Bonwick } 631ad860c82Sbonwick } 632fa9e4066Sahrens 633fa9e4066Sahrens dprintf("upgrading obj=%llu with %u chunks\n", 634fa9e4066Sahrens zap->zap_object, nchunks); 635da6c28aaSamw /* XXX destroy the avl later, so we can use the stored hash value */ 636fa9e4066Sahrens mze_destroy(zap); 637fa9e4066Sahrens 638b24ab676SJeff Bonwick fzap_upgrade(zap, tx, flags); 639fa9e4066Sahrens 640fa9e4066Sahrens for (i = 0; i < nchunks; i++) { 641fa9e4066Sahrens mzap_ent_phys_t *mze = &mzp->mz_chunk[i]; 642da6c28aaSamw zap_name_t *zn; 643fa9e4066Sahrens if (mze->mze_name[0] == 0) 644fa9e4066Sahrens continue; 645fa9e4066Sahrens dprintf("adding %s=%llu\n", 646fa9e4066Sahrens mze->mze_name, mze->mze_value); 647*1c17160aSKevin Crowe zn = zap_name_alloc(zap, mze->mze_name, 0); 648ae972795SMatthew Ahrens err = fzap_add_cd(zn, 8, 1, &mze->mze_value, mze->mze_cd, 649ae972795SMatthew Ahrens tag, tx); 650ad860c82Sbonwick zap = zn->zn_zap; /* fzap_add_cd() may change zap */ 651da6c28aaSamw zap_name_free(zn); 652ad860c82Sbonwick if (err) 653ad860c82Sbonwick break; 654fa9e4066Sahrens } 655be3e2ab9SBrian Behlendorf zio_buf_free(mzp, sz); 656ad860c82Sbonwick *zapp = zap; 657ad860c82Sbonwick return (err); 658fa9e4066Sahrens } 659fa9e4066Sahrens 660*1c17160aSKevin Crowe /* 661*1c17160aSKevin Crowe * The "normflags" determine the behavior of the matchtype_t which is 662*1c17160aSKevin Crowe * passed to zap_lookup_norm(). Names which have the same normalized 663*1c17160aSKevin Crowe * version will be stored with the same hash value, and therefore we can 664*1c17160aSKevin Crowe * perform normalization-insensitive lookups. We can be Unicode form- 665*1c17160aSKevin Crowe * insensitive and/or case-insensitive. The following flags are valid for 666*1c17160aSKevin Crowe * "normflags": 667*1c17160aSKevin Crowe * 668*1c17160aSKevin Crowe * U8_TEXTPREP_NFC 669*1c17160aSKevin Crowe * U8_TEXTPREP_NFD 670*1c17160aSKevin Crowe * U8_TEXTPREP_NFKC 671*1c17160aSKevin Crowe * U8_TEXTPREP_NFKD 672*1c17160aSKevin Crowe * U8_TEXTPREP_TOUPPER 673*1c17160aSKevin Crowe * 674*1c17160aSKevin Crowe * The *_NF* (Normalization Form) flags are mutually exclusive; at most one 675*1c17160aSKevin Crowe * of them may be supplied. 676*1c17160aSKevin Crowe */ 6772acef22dSMatthew Ahrens void 678b24ab676SJeff Bonwick mzap_create_impl(objset_t *os, uint64_t obj, int normflags, zap_flags_t flags, 679b24ab676SJeff Bonwick dmu_tx_t *tx) 680fa9e4066Sahrens { 681fa9e4066Sahrens dmu_buf_t *db; 682fa9e4066Sahrens mzap_phys_t *zp; 683fa9e4066Sahrens 68447cb52daSJeff Bonwick VERIFY(0 == dmu_buf_hold(os, obj, 0, FTAG, &db, DMU_READ_NO_PREFETCH)); 685fa9e4066Sahrens 686fa9e4066Sahrens #ifdef ZFS_DEBUG 687fa9e4066Sahrens { 688fa9e4066Sahrens dmu_object_info_t doi; 689fa9e4066Sahrens dmu_object_info_from_db(db, &doi); 690ad135b5dSChristopher Siden ASSERT3U(DMU_OT_BYTESWAP(doi.doi_type), ==, DMU_BSWAP_ZAP); 691fa9e4066Sahrens } 692fa9e4066Sahrens #endif 693fa9e4066Sahrens 694fa9e4066Sahrens dmu_buf_will_dirty(db, tx); 695fa9e4066Sahrens zp = db->db_data; 696fa9e4066Sahrens zp->mz_block_type = ZBT_MICRO; 697fa9e4066Sahrens zp->mz_salt = ((uintptr_t)db ^ (uintptr_t)tx ^ (obj << 1)) | 1ULL; 698da6c28aaSamw zp->mz_normflags = normflags; 699ea8dc4b6Seschrock dmu_buf_rele(db, FTAG); 700b24ab676SJeff Bonwick 701b24ab676SJeff Bonwick if (flags != 0) { 702b24ab676SJeff Bonwick zap_t *zap; 703b24ab676SJeff Bonwick /* Only fat zap supports flags; upgrade immediately. */ 704b24ab676SJeff Bonwick VERIFY(0 == zap_lockdir(os, obj, tx, RW_WRITER, 705ae972795SMatthew Ahrens B_FALSE, B_FALSE, FTAG, &zap)); 706ae972795SMatthew Ahrens VERIFY3U(0, ==, mzap_upgrade(&zap, FTAG, tx, flags)); 707ae972795SMatthew Ahrens zap_unlockdir(zap, FTAG); 708b24ab676SJeff Bonwick } 709fa9e4066Sahrens } 710fa9e4066Sahrens 711fa9e4066Sahrens int 712fa9e4066Sahrens zap_create_claim(objset_t *os, uint64_t obj, dmu_object_type_t ot, 713fa9e4066Sahrens dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) 714da6c28aaSamw { 715da6c28aaSamw return (zap_create_claim_norm(os, obj, 716da6c28aaSamw 0, ot, bonustype, bonuslen, tx)); 717da6c28aaSamw } 718da6c28aaSamw 719da6c28aaSamw int 720da6c28aaSamw zap_create_claim_norm(objset_t *os, uint64_t obj, int normflags, 721da6c28aaSamw dmu_object_type_t ot, 722da6c28aaSamw dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) 723fa9e4066Sahrens { 724fa9e4066Sahrens int err; 725fa9e4066Sahrens 726fa9e4066Sahrens err = dmu_object_claim(os, obj, ot, 0, bonustype, bonuslen, tx); 727fa9e4066Sahrens if (err != 0) 728fa9e4066Sahrens return (err); 729b24ab676SJeff Bonwick mzap_create_impl(os, obj, normflags, 0, tx); 730fa9e4066Sahrens return (0); 731fa9e4066Sahrens } 732fa9e4066Sahrens 733fa9e4066Sahrens uint64_t 734fa9e4066Sahrens zap_create(objset_t *os, dmu_object_type_t ot, 735fa9e4066Sahrens dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) 736da6c28aaSamw { 737da6c28aaSamw return (zap_create_norm(os, 0, ot, bonustype, bonuslen, tx)); 738da6c28aaSamw } 739da6c28aaSamw 740da6c28aaSamw uint64_t 741da6c28aaSamw zap_create_norm(objset_t *os, int normflags, dmu_object_type_t ot, 742da6c28aaSamw dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) 743fa9e4066Sahrens { 744fa9e4066Sahrens uint64_t obj = dmu_object_alloc(os, ot, 0, bonustype, bonuslen, tx); 745fa9e4066Sahrens 746b24ab676SJeff Bonwick mzap_create_impl(os, obj, normflags, 0, tx); 747b24ab676SJeff Bonwick return (obj); 748b24ab676SJeff Bonwick } 749b24ab676SJeff Bonwick 750b24ab676SJeff Bonwick uint64_t 751b24ab676SJeff Bonwick zap_create_flags(objset_t *os, int normflags, zap_flags_t flags, 752b24ab676SJeff Bonwick dmu_object_type_t ot, int leaf_blockshift, int indirect_blockshift, 753b24ab676SJeff Bonwick dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) 754b24ab676SJeff Bonwick { 755b24ab676SJeff Bonwick uint64_t obj = dmu_object_alloc(os, ot, 0, bonustype, bonuslen, tx); 756b24ab676SJeff Bonwick 757b24ab676SJeff Bonwick ASSERT(leaf_blockshift >= SPA_MINBLOCKSHIFT && 758b5152584SMatthew Ahrens leaf_blockshift <= SPA_OLD_MAXBLOCKSHIFT && 759b24ab676SJeff Bonwick indirect_blockshift >= SPA_MINBLOCKSHIFT && 760b5152584SMatthew Ahrens indirect_blockshift <= SPA_OLD_MAXBLOCKSHIFT); 761b24ab676SJeff Bonwick 762b24ab676SJeff Bonwick VERIFY(dmu_object_set_blocksize(os, obj, 763b24ab676SJeff Bonwick 1ULL << leaf_blockshift, indirect_blockshift, tx) == 0); 764b24ab676SJeff Bonwick 765b24ab676SJeff Bonwick mzap_create_impl(os, obj, normflags, flags, tx); 766fa9e4066Sahrens return (obj); 767fa9e4066Sahrens } 768fa9e4066Sahrens 769fa9e4066Sahrens int 770fa9e4066Sahrens zap_destroy(objset_t *os, uint64_t zapobj, dmu_tx_t *tx) 771fa9e4066Sahrens { 772fa9e4066Sahrens /* 773fa9e4066Sahrens * dmu_object_free will free the object number and free the 774fa9e4066Sahrens * data. Freeing the data will cause our pageout function to be 775fa9e4066Sahrens * called, which will destroy our data (zap_leaf_t's and zap_t). 776fa9e4066Sahrens */ 777fa9e4066Sahrens 778fa9e4066Sahrens return (dmu_object_free(os, zapobj, tx)); 779fa9e4066Sahrens } 780fa9e4066Sahrens 781fa9e4066Sahrens void 78240510e8eSJosef 'Jeff' Sipek zap_evict_sync(void *dbu) 783fa9e4066Sahrens { 784bc9014e6SJustin Gibbs zap_t *zap = dbu; 785fa9e4066Sahrens 786fa9e4066Sahrens rw_destroy(&zap->zap_rwlock); 787fa9e4066Sahrens 788f65e61c0Sahrens if (zap->zap_ismicro) 789fa9e4066Sahrens mze_destroy(zap); 790c25056deSgw else 791c25056deSgw mutex_destroy(&zap->zap_f.zap_num_entries_mtx); 792fa9e4066Sahrens 793fa9e4066Sahrens kmem_free(zap, sizeof (zap_t)); 794fa9e4066Sahrens } 795fa9e4066Sahrens 796fa9e4066Sahrens int 797fa9e4066Sahrens zap_count(objset_t *os, uint64_t zapobj, uint64_t *count) 798fa9e4066Sahrens { 799fa9e4066Sahrens zap_t *zap; 800fa9e4066Sahrens int err; 801fa9e4066Sahrens 802ae972795SMatthew Ahrens err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, FTAG, &zap); 803fa9e4066Sahrens if (err) 804fa9e4066Sahrens return (err); 805fa9e4066Sahrens if (!zap->zap_ismicro) { 806fa9e4066Sahrens err = fzap_count(zap, count); 807fa9e4066Sahrens } else { 808fa9e4066Sahrens *count = zap->zap_m.zap_num_entries; 809fa9e4066Sahrens } 810ae972795SMatthew Ahrens zap_unlockdir(zap, FTAG); 811fa9e4066Sahrens return (err); 812fa9e4066Sahrens } 813fa9e4066Sahrens 814fa9e4066Sahrens /* 815da6c28aaSamw * zn may be NULL; if not specified, it will be computed if needed. 816da6c28aaSamw * See also the comment above zap_entry_normalization_conflict(). 817da6c28aaSamw */ 818da6c28aaSamw static boolean_t 819da6c28aaSamw mzap_normalization_conflict(zap_t *zap, zap_name_t *zn, mzap_ent_t *mze) 820da6c28aaSamw { 821da6c28aaSamw mzap_ent_t *other; 822da6c28aaSamw int direction = AVL_BEFORE; 823da6c28aaSamw boolean_t allocdzn = B_FALSE; 824da6c28aaSamw 825da6c28aaSamw if (zap->zap_normflags == 0) 826da6c28aaSamw return (B_FALSE); 827da6c28aaSamw 828da6c28aaSamw again: 829da6c28aaSamw for (other = avl_walk(&zap->zap_m.zap_avl, mze, direction); 830da6c28aaSamw other && other->mze_hash == mze->mze_hash; 831da6c28aaSamw other = avl_walk(&zap->zap_m.zap_avl, other, direction)) { 832da6c28aaSamw 833da6c28aaSamw if (zn == NULL) { 8343f9d6ad7SLin Ling zn = zap_name_alloc(zap, MZE_PHYS(zap, mze)->mze_name, 835*1c17160aSKevin Crowe MT_NORMALIZE); 836da6c28aaSamw allocdzn = B_TRUE; 837da6c28aaSamw } 8383f9d6ad7SLin Ling if (zap_match(zn, MZE_PHYS(zap, other)->mze_name)) { 839da6c28aaSamw if (allocdzn) 840da6c28aaSamw zap_name_free(zn); 841da6c28aaSamw return (B_TRUE); 842da6c28aaSamw } 843da6c28aaSamw } 844da6c28aaSamw 845da6c28aaSamw if (direction == AVL_BEFORE) { 846da6c28aaSamw direction = AVL_AFTER; 847da6c28aaSamw goto again; 848da6c28aaSamw } 849da6c28aaSamw 850da6c28aaSamw if (allocdzn) 851da6c28aaSamw zap_name_free(zn); 852da6c28aaSamw return (B_FALSE); 853da6c28aaSamw } 854da6c28aaSamw 855da6c28aaSamw /* 856da6c28aaSamw * Routines for manipulating attributes. 857fa9e4066Sahrens */ 858fa9e4066Sahrens 859fa9e4066Sahrens int 860fa9e4066Sahrens zap_lookup(objset_t *os, uint64_t zapobj, const char *name, 861fa9e4066Sahrens uint64_t integer_size, uint64_t num_integers, void *buf) 862da6c28aaSamw { 863da6c28aaSamw return (zap_lookup_norm(os, zapobj, name, integer_size, 864*1c17160aSKevin Crowe num_integers, buf, 0, NULL, 0, NULL)); 865da6c28aaSamw } 866da6c28aaSamw 867ae972795SMatthew Ahrens static int 868ae972795SMatthew Ahrens zap_lookup_impl(zap_t *zap, const char *name, 869da6c28aaSamw uint64_t integer_size, uint64_t num_integers, void *buf, 870da6c28aaSamw matchtype_t mt, char *realname, int rn_len, 871da6c28aaSamw boolean_t *ncp) 872fa9e4066Sahrens { 873ae972795SMatthew Ahrens int err = 0; 874fa9e4066Sahrens mzap_ent_t *mze; 875da6c28aaSamw zap_name_t *zn; 876fa9e4066Sahrens 877da6c28aaSamw zn = zap_name_alloc(zap, name, mt); 878ae972795SMatthew Ahrens if (zn == NULL) 879be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 880da6c28aaSamw 881fa9e4066Sahrens if (!zap->zap_ismicro) { 882da6c28aaSamw err = fzap_lookup(zn, integer_size, num_integers, buf, 883da6c28aaSamw realname, rn_len, ncp); 884fa9e4066Sahrens } else { 885da6c28aaSamw mze = mze_find(zn); 886fa9e4066Sahrens if (mze == NULL) { 887be6fd75aSMatthew Ahrens err = SET_ERROR(ENOENT); 888fa9e4066Sahrens } else { 889da6c28aaSamw if (num_integers < 1) { 890be6fd75aSMatthew Ahrens err = SET_ERROR(EOVERFLOW); 891da6c28aaSamw } else if (integer_size != 8) { 892be6fd75aSMatthew Ahrens err = SET_ERROR(EINVAL); 893da6c28aaSamw } else { 8943f9d6ad7SLin Ling *(uint64_t *)buf = 8953f9d6ad7SLin Ling MZE_PHYS(zap, mze)->mze_value; 896da6c28aaSamw (void) strlcpy(realname, 8973f9d6ad7SLin Ling MZE_PHYS(zap, mze)->mze_name, rn_len); 898da6c28aaSamw if (ncp) { 899da6c28aaSamw *ncp = mzap_normalization_conflict(zap, 900da6c28aaSamw zn, mze); 901da6c28aaSamw } 902da6c28aaSamw } 903fa9e4066Sahrens } 904fa9e4066Sahrens } 905da6c28aaSamw zap_name_free(zn); 906ae972795SMatthew Ahrens return (err); 907ae972795SMatthew Ahrens } 908ae972795SMatthew Ahrens 909ae972795SMatthew Ahrens int 910ae972795SMatthew Ahrens zap_lookup_norm(objset_t *os, uint64_t zapobj, const char *name, 911ae972795SMatthew Ahrens uint64_t integer_size, uint64_t num_integers, void *buf, 912ae972795SMatthew Ahrens matchtype_t mt, char *realname, int rn_len, 913ae972795SMatthew Ahrens boolean_t *ncp) 914ae972795SMatthew Ahrens { 915ae972795SMatthew Ahrens zap_t *zap; 916ae972795SMatthew Ahrens int err; 917ae972795SMatthew Ahrens 918ae972795SMatthew Ahrens err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, FTAG, &zap); 919ae972795SMatthew Ahrens if (err != 0) 920ae972795SMatthew Ahrens return (err); 921ae972795SMatthew Ahrens err = zap_lookup_impl(zap, name, integer_size, 922ae972795SMatthew Ahrens num_integers, buf, mt, realname, rn_len, ncp); 923ae972795SMatthew Ahrens zap_unlockdir(zap, FTAG); 924fa9e4066Sahrens return (err); 925fa9e4066Sahrens } 926fa9e4066Sahrens 92779d72832SMatthew Ahrens int 92879d72832SMatthew Ahrens zap_lookup_by_dnode(dnode_t *dn, const char *name, 92979d72832SMatthew Ahrens uint64_t integer_size, uint64_t num_integers, void *buf) 93079d72832SMatthew Ahrens { 93179d72832SMatthew Ahrens return (zap_lookup_norm_by_dnode(dn, name, integer_size, 932*1c17160aSKevin Crowe num_integers, buf, 0, NULL, 0, NULL)); 93379d72832SMatthew Ahrens } 93479d72832SMatthew Ahrens 93579d72832SMatthew Ahrens int 93679d72832SMatthew Ahrens zap_lookup_norm_by_dnode(dnode_t *dn, const char *name, 93779d72832SMatthew Ahrens uint64_t integer_size, uint64_t num_integers, void *buf, 93879d72832SMatthew Ahrens matchtype_t mt, char *realname, int rn_len, 93979d72832SMatthew Ahrens boolean_t *ncp) 94079d72832SMatthew Ahrens { 94179d72832SMatthew Ahrens zap_t *zap; 94279d72832SMatthew Ahrens int err; 94379d72832SMatthew Ahrens 94479d72832SMatthew Ahrens err = zap_lockdir_by_dnode(dn, NULL, RW_READER, TRUE, FALSE, 94579d72832SMatthew Ahrens FTAG, &zap); 94679d72832SMatthew Ahrens if (err != 0) 94779d72832SMatthew Ahrens return (err); 94879d72832SMatthew Ahrens err = zap_lookup_impl(zap, name, integer_size, 94979d72832SMatthew Ahrens num_integers, buf, mt, realname, rn_len, ncp); 95079d72832SMatthew Ahrens zap_unlockdir(zap, FTAG); 95179d72832SMatthew Ahrens return (err); 95279d72832SMatthew Ahrens } 95379d72832SMatthew Ahrens 954c7cd2421SGeorge Wilson int 955c7cd2421SGeorge Wilson zap_prefetch_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, 956c7cd2421SGeorge Wilson int key_numints) 957c7cd2421SGeorge Wilson { 958c7cd2421SGeorge Wilson zap_t *zap; 959c7cd2421SGeorge Wilson int err; 960c7cd2421SGeorge Wilson zap_name_t *zn; 961c7cd2421SGeorge Wilson 962ae972795SMatthew Ahrens err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, FTAG, &zap); 963c7cd2421SGeorge Wilson if (err) 964c7cd2421SGeorge Wilson return (err); 965c7cd2421SGeorge Wilson zn = zap_name_alloc_uint64(zap, key, key_numints); 966c7cd2421SGeorge Wilson if (zn == NULL) { 967ae972795SMatthew Ahrens zap_unlockdir(zap, FTAG); 968be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 969c7cd2421SGeorge Wilson } 970c7cd2421SGeorge Wilson 971c7cd2421SGeorge Wilson fzap_prefetch(zn); 972c7cd2421SGeorge Wilson zap_name_free(zn); 973ae972795SMatthew Ahrens zap_unlockdir(zap, FTAG); 974c7cd2421SGeorge Wilson return (err); 975c7cd2421SGeorge Wilson } 976c7cd2421SGeorge Wilson 977b24ab676SJeff Bonwick int 978b24ab676SJeff Bonwick zap_lookup_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, 979b24ab676SJeff Bonwick int key_numints, uint64_t integer_size, uint64_t num_integers, void *buf) 980b24ab676SJeff Bonwick { 981b24ab676SJeff Bonwick zap_t *zap; 982b24ab676SJeff Bonwick int err; 983b24ab676SJeff Bonwick zap_name_t *zn; 984b24ab676SJeff Bonwick 985ae972795SMatthew Ahrens err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, FTAG, &zap); 986b24ab676SJeff Bonwick if (err) 987b24ab676SJeff Bonwick return (err); 988b24ab676SJeff Bonwick zn = zap_name_alloc_uint64(zap, key, key_numints); 989b24ab676SJeff Bonwick if (zn == NULL) { 990ae972795SMatthew Ahrens zap_unlockdir(zap, FTAG); 991be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 992b24ab676SJeff Bonwick } 993b24ab676SJeff Bonwick 994b24ab676SJeff Bonwick err = fzap_lookup(zn, integer_size, num_integers, buf, 995b24ab676SJeff Bonwick NULL, 0, NULL); 996b24ab676SJeff Bonwick zap_name_free(zn); 997ae972795SMatthew Ahrens zap_unlockdir(zap, FTAG); 998b24ab676SJeff Bonwick return (err); 999b24ab676SJeff Bonwick } 1000b24ab676SJeff Bonwick 100192241e0bSTom Erickson int 100292241e0bSTom Erickson zap_contains(objset_t *os, uint64_t zapobj, const char *name) 100392241e0bSTom Erickson { 10042acef22dSMatthew Ahrens int err = zap_lookup_norm(os, zapobj, name, 0, 1005*1c17160aSKevin Crowe 0, NULL, 0, NULL, 0, NULL); 100692241e0bSTom Erickson if (err == EOVERFLOW || err == EINVAL) 100792241e0bSTom Erickson err = 0; /* found, but skipped reading the value */ 100892241e0bSTom Erickson return (err); 100992241e0bSTom Erickson } 101092241e0bSTom Erickson 1011fa9e4066Sahrens int 1012fa9e4066Sahrens zap_length(objset_t *os, uint64_t zapobj, const char *name, 1013fa9e4066Sahrens uint64_t *integer_size, uint64_t *num_integers) 1014fa9e4066Sahrens { 1015fa9e4066Sahrens zap_t *zap; 1016fa9e4066Sahrens int err; 1017fa9e4066Sahrens mzap_ent_t *mze; 1018da6c28aaSamw zap_name_t *zn; 1019fa9e4066Sahrens 1020ae972795SMatthew Ahrens err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, FTAG, &zap); 1021fa9e4066Sahrens if (err) 1022fa9e4066Sahrens return (err); 1023*1c17160aSKevin Crowe zn = zap_name_alloc(zap, name, 0); 1024da6c28aaSamw if (zn == NULL) { 1025ae972795SMatthew Ahrens zap_unlockdir(zap, FTAG); 1026be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 1027da6c28aaSamw } 1028fa9e4066Sahrens if (!zap->zap_ismicro) { 1029da6c28aaSamw err = fzap_length(zn, integer_size, num_integers); 1030fa9e4066Sahrens } else { 1031da6c28aaSamw mze = mze_find(zn); 1032fa9e4066Sahrens if (mze == NULL) { 1033be6fd75aSMatthew Ahrens err = SET_ERROR(ENOENT); 1034fa9e4066Sahrens } else { 1035fa9e4066Sahrens if (integer_size) 1036fa9e4066Sahrens *integer_size = 8; 1037fa9e4066Sahrens if (num_integers) 1038fa9e4066Sahrens *num_integers = 1; 1039fa9e4066Sahrens } 1040fa9e4066Sahrens } 1041da6c28aaSamw zap_name_free(zn); 1042ae972795SMatthew Ahrens zap_unlockdir(zap, FTAG); 1043fa9e4066Sahrens return (err); 1044fa9e4066Sahrens } 1045fa9e4066Sahrens 1046b24ab676SJeff Bonwick int 1047b24ab676SJeff Bonwick zap_length_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, 1048b24ab676SJeff Bonwick int key_numints, uint64_t *integer_size, uint64_t *num_integers) 1049b24ab676SJeff Bonwick { 1050b24ab676SJeff Bonwick zap_t *zap; 1051b24ab676SJeff Bonwick int err; 1052b24ab676SJeff Bonwick zap_name_t *zn; 1053b24ab676SJeff Bonwick 1054ae972795SMatthew Ahrens err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, FTAG, &zap); 1055b24ab676SJeff Bonwick if (err) 1056b24ab676SJeff Bonwick return (err); 1057b24ab676SJeff Bonwick zn = zap_name_alloc_uint64(zap, key, key_numints); 1058b24ab676SJeff Bonwick if (zn == NULL) { 1059ae972795SMatthew Ahrens zap_unlockdir(zap, FTAG); 1060be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 1061b24ab676SJeff Bonwick } 1062b24ab676SJeff Bonwick err = fzap_length(zn, integer_size, num_integers); 1063b24ab676SJeff Bonwick zap_name_free(zn); 1064ae972795SMatthew Ahrens zap_unlockdir(zap, FTAG); 1065b24ab676SJeff Bonwick return (err); 1066b24ab676SJeff Bonwick } 1067b24ab676SJeff Bonwick 1068fa9e4066Sahrens static void 1069da6c28aaSamw mzap_addent(zap_name_t *zn, uint64_t value) 1070fa9e4066Sahrens { 1071fa9e4066Sahrens int i; 1072da6c28aaSamw zap_t *zap = zn->zn_zap; 1073fa9e4066Sahrens int start = zap->zap_m.zap_alloc_next; 1074fa9e4066Sahrens uint32_t cd; 1075fa9e4066Sahrens 1076fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 1077fa9e4066Sahrens 1078fa9e4066Sahrens #ifdef ZFS_DEBUG 1079fa9e4066Sahrens for (i = 0; i < zap->zap_m.zap_num_chunks; i++) { 1080c1379625SJustin T. Gibbs mzap_ent_phys_t *mze = &zap_m_phys(zap)->mz_chunk[i]; 1081b24ab676SJeff Bonwick ASSERT(strcmp(zn->zn_key_orig, mze->mze_name) != 0); 1082fa9e4066Sahrens } 1083fa9e4066Sahrens #endif 1084fa9e4066Sahrens 1085da6c28aaSamw cd = mze_find_unused_cd(zap, zn->zn_hash); 1086fa9e4066Sahrens /* given the limited size of the microzap, this can't happen */ 1087b24ab676SJeff Bonwick ASSERT(cd < zap_maxcd(zap)); 1088fa9e4066Sahrens 1089fa9e4066Sahrens again: 1090fa9e4066Sahrens for (i = start; i < zap->zap_m.zap_num_chunks; i++) { 1091c1379625SJustin T. Gibbs mzap_ent_phys_t *mze = &zap_m_phys(zap)->mz_chunk[i]; 1092fa9e4066Sahrens if (mze->mze_name[0] == 0) { 1093fa9e4066Sahrens mze->mze_value = value; 1094fa9e4066Sahrens mze->mze_cd = cd; 1095b24ab676SJeff Bonwick (void) strcpy(mze->mze_name, zn->zn_key_orig); 1096fa9e4066Sahrens zap->zap_m.zap_num_entries++; 1097fa9e4066Sahrens zap->zap_m.zap_alloc_next = i+1; 1098fa9e4066Sahrens if (zap->zap_m.zap_alloc_next == 1099fa9e4066Sahrens zap->zap_m.zap_num_chunks) 1100fa9e4066Sahrens zap->zap_m.zap_alloc_next = 0; 11013f9d6ad7SLin Ling mze_insert(zap, i, zn->zn_hash); 1102fa9e4066Sahrens return; 1103fa9e4066Sahrens } 1104fa9e4066Sahrens } 1105fa9e4066Sahrens if (start != 0) { 1106fa9e4066Sahrens start = 0; 1107fa9e4066Sahrens goto again; 1108fa9e4066Sahrens } 1109fa9e4066Sahrens ASSERT(!"out of entries!"); 1110fa9e4066Sahrens } 1111fa9e4066Sahrens 1112fa9e4066Sahrens int 1113b24ab676SJeff Bonwick zap_add(objset_t *os, uint64_t zapobj, const char *key, 1114fa9e4066Sahrens int integer_size, uint64_t num_integers, 1115fa9e4066Sahrens const void *val, dmu_tx_t *tx) 1116fa9e4066Sahrens { 1117fa9e4066Sahrens zap_t *zap; 1118fa9e4066Sahrens int err; 1119fa9e4066Sahrens mzap_ent_t *mze; 1120fa9e4066Sahrens const uint64_t *intval = val; 1121da6c28aaSamw zap_name_t *zn; 1122fa9e4066Sahrens 1123ae972795SMatthew Ahrens err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, FTAG, &zap); 1124fa9e4066Sahrens if (err) 1125fa9e4066Sahrens return (err); 1126*1c17160aSKevin Crowe zn = zap_name_alloc(zap, key, 0); 1127da6c28aaSamw if (zn == NULL) { 1128ae972795SMatthew Ahrens zap_unlockdir(zap, FTAG); 1129be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 1130da6c28aaSamw } 1131fa9e4066Sahrens if (!zap->zap_ismicro) { 1132ae972795SMatthew Ahrens err = fzap_add(zn, integer_size, num_integers, val, FTAG, tx); 1133ad860c82Sbonwick zap = zn->zn_zap; /* fzap_add() may change zap */ 1134fa9e4066Sahrens } else if (integer_size != 8 || num_integers != 1 || 1135b24ab676SJeff Bonwick strlen(key) >= MZAP_NAME_LEN) { 1136ae972795SMatthew Ahrens err = mzap_upgrade(&zn->zn_zap, FTAG, tx, 0); 1137ae972795SMatthew Ahrens if (err == 0) { 1138ae972795SMatthew Ahrens err = fzap_add(zn, integer_size, num_integers, val, 1139ae972795SMatthew Ahrens FTAG, tx); 1140ae972795SMatthew Ahrens } 1141ad860c82Sbonwick zap = zn->zn_zap; /* fzap_add() may change zap */ 1142fa9e4066Sahrens } else { 1143da6c28aaSamw mze = mze_find(zn); 1144fa9e4066Sahrens if (mze != NULL) { 1145be6fd75aSMatthew Ahrens err = SET_ERROR(EEXIST); 1146fa9e4066Sahrens } else { 1147da6c28aaSamw mzap_addent(zn, *intval); 1148fa9e4066Sahrens } 1149fa9e4066Sahrens } 1150ad860c82Sbonwick ASSERT(zap == zn->zn_zap); 1151da6c28aaSamw zap_name_free(zn); 1152ad860c82Sbonwick if (zap != NULL) /* may be NULL if fzap_add() failed */ 1153ae972795SMatthew Ahrens zap_unlockdir(zap, FTAG); 1154fa9e4066Sahrens return (err); 1155fa9e4066Sahrens } 1156fa9e4066Sahrens 1157b24ab676SJeff Bonwick int 1158b24ab676SJeff Bonwick zap_add_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, 1159b24ab676SJeff Bonwick int key_numints, int integer_size, uint64_t num_integers, 1160b24ab676SJeff Bonwick const void *val, dmu_tx_t *tx) 1161b24ab676SJeff Bonwick { 1162b24ab676SJeff Bonwick zap_t *zap; 1163b24ab676SJeff Bonwick int err; 1164b24ab676SJeff Bonwick zap_name_t *zn; 1165b24ab676SJeff Bonwick 1166ae972795SMatthew Ahrens err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, FTAG, &zap); 1167b24ab676SJeff Bonwick if (err) 1168b24ab676SJeff Bonwick return (err); 1169b24ab676SJeff Bonwick zn = zap_name_alloc_uint64(zap, key, key_numints); 1170b24ab676SJeff Bonwick if (zn == NULL) { 1171ae972795SMatthew Ahrens zap_unlockdir(zap, FTAG); 1172be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 1173b24ab676SJeff Bonwick } 1174ae972795SMatthew Ahrens err = fzap_add(zn, integer_size, num_integers, val, FTAG, tx); 1175b24ab676SJeff Bonwick zap = zn->zn_zap; /* fzap_add() may change zap */ 1176b24ab676SJeff Bonwick zap_name_free(zn); 1177b24ab676SJeff Bonwick if (zap != NULL) /* may be NULL if fzap_add() failed */ 1178ae972795SMatthew Ahrens zap_unlockdir(zap, FTAG); 1179b24ab676SJeff Bonwick return (err); 1180b24ab676SJeff Bonwick } 1181b24ab676SJeff Bonwick 1182fa9e4066Sahrens int 1183fa9e4066Sahrens zap_update(objset_t *os, uint64_t zapobj, const char *name, 1184fa9e4066Sahrens int integer_size, uint64_t num_integers, const void *val, dmu_tx_t *tx) 1185fa9e4066Sahrens { 1186fa9e4066Sahrens zap_t *zap; 1187fa9e4066Sahrens mzap_ent_t *mze; 11883f9d6ad7SLin Ling uint64_t oldval; 1189fa9e4066Sahrens const uint64_t *intval = val; 1190da6c28aaSamw zap_name_t *zn; 1191fa9e4066Sahrens int err; 1192fa9e4066Sahrens 11933f9d6ad7SLin Ling #ifdef ZFS_DEBUG 11943f9d6ad7SLin Ling /* 11953f9d6ad7SLin Ling * If there is an old value, it shouldn't change across the 11963f9d6ad7SLin Ling * lockdir (eg, due to bprewrite's xlation). 11973f9d6ad7SLin Ling */ 11983f9d6ad7SLin Ling if (integer_size == 8 && num_integers == 1) 11993f9d6ad7SLin Ling (void) zap_lookup(os, zapobj, name, 8, 1, &oldval); 12003f9d6ad7SLin Ling #endif 12013f9d6ad7SLin Ling 1202ae972795SMatthew Ahrens err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, FTAG, &zap); 1203fa9e4066Sahrens if (err) 1204fa9e4066Sahrens return (err); 1205*1c17160aSKevin Crowe zn = zap_name_alloc(zap, name, 0); 1206da6c28aaSamw if (zn == NULL) { 1207ae972795SMatthew Ahrens zap_unlockdir(zap, FTAG); 1208be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 1209da6c28aaSamw } 1210fa9e4066Sahrens if (!zap->zap_ismicro) { 1211ae972795SMatthew Ahrens err = fzap_update(zn, integer_size, num_integers, val, 1212ae972795SMatthew Ahrens FTAG, tx); 1213ad860c82Sbonwick zap = zn->zn_zap; /* fzap_update() may change zap */ 1214fa9e4066Sahrens } else if (integer_size != 8 || num_integers != 1 || 1215fa9e4066Sahrens strlen(name) >= MZAP_NAME_LEN) { 1216fa9e4066Sahrens dprintf("upgrading obj %llu: intsz=%u numint=%llu name=%s\n", 1217fa9e4066Sahrens zapobj, integer_size, num_integers, name); 1218ae972795SMatthew Ahrens err = mzap_upgrade(&zn->zn_zap, FTAG, tx, 0); 1219ae972795SMatthew Ahrens if (err == 0) { 1220ad860c82Sbonwick err = fzap_update(zn, integer_size, num_integers, 1221ae972795SMatthew Ahrens val, FTAG, tx); 1222ae972795SMatthew Ahrens } 1223ad860c82Sbonwick zap = zn->zn_zap; /* fzap_update() may change zap */ 1224fa9e4066Sahrens } else { 1225da6c28aaSamw mze = mze_find(zn); 1226fa9e4066Sahrens if (mze != NULL) { 12273f9d6ad7SLin Ling ASSERT3U(MZE_PHYS(zap, mze)->mze_value, ==, oldval); 12283f9d6ad7SLin Ling MZE_PHYS(zap, mze)->mze_value = *intval; 1229fa9e4066Sahrens } else { 1230da6c28aaSamw mzap_addent(zn, *intval); 1231fa9e4066Sahrens } 1232fa9e4066Sahrens } 1233ad860c82Sbonwick ASSERT(zap == zn->zn_zap); 1234da6c28aaSamw zap_name_free(zn); 1235ad860c82Sbonwick if (zap != NULL) /* may be NULL if fzap_upgrade() failed */ 1236ae972795SMatthew Ahrens zap_unlockdir(zap, FTAG); 1237455d5089Sahrens return (err); 1238fa9e4066Sahrens } 1239fa9e4066Sahrens 1240b24ab676SJeff Bonwick int 1241b24ab676SJeff Bonwick zap_update_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, 1242b24ab676SJeff Bonwick int key_numints, 1243b24ab676SJeff Bonwick int integer_size, uint64_t num_integers, const void *val, dmu_tx_t *tx) 1244b24ab676SJeff Bonwick { 1245b24ab676SJeff Bonwick zap_t *zap; 1246b24ab676SJeff Bonwick zap_name_t *zn; 1247b24ab676SJeff Bonwick int err; 1248b24ab676SJeff Bonwick 1249ae972795SMatthew Ahrens err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, FTAG, &zap); 1250b24ab676SJeff Bonwick if (err) 1251b24ab676SJeff Bonwick return (err); 1252b24ab676SJeff Bonwick zn = zap_name_alloc_uint64(zap, key, key_numints); 1253b24ab676SJeff Bonwick if (zn == NULL) { 1254ae972795SMatthew Ahrens zap_unlockdir(zap, FTAG); 1255be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 1256b24ab676SJeff Bonwick } 1257ae972795SMatthew Ahrens err = fzap_update(zn, integer_size, num_integers, val, FTAG, tx); 1258b24ab676SJeff Bonwick zap = zn->zn_zap; /* fzap_update() may change zap */ 1259b24ab676SJeff Bonwick zap_name_free(zn); 1260b24ab676SJeff Bonwick if (zap != NULL) /* may be NULL if fzap_upgrade() failed */ 1261ae972795SMatthew Ahrens zap_unlockdir(zap, FTAG); 1262b24ab676SJeff Bonwick return (err); 1263b24ab676SJeff Bonwick } 1264b24ab676SJeff Bonwick 1265fa9e4066Sahrens int 1266fa9e4066Sahrens zap_remove(objset_t *os, uint64_t zapobj, const char *name, dmu_tx_t *tx) 1267da6c28aaSamw { 1268*1c17160aSKevin Crowe return (zap_remove_norm(os, zapobj, name, 0, tx)); 1269da6c28aaSamw } 1270da6c28aaSamw 1271da6c28aaSamw int 1272da6c28aaSamw zap_remove_norm(objset_t *os, uint64_t zapobj, const char *name, 1273da6c28aaSamw matchtype_t mt, dmu_tx_t *tx) 1274fa9e4066Sahrens { 1275fa9e4066Sahrens zap_t *zap; 1276fa9e4066Sahrens int err; 1277fa9e4066Sahrens mzap_ent_t *mze; 1278da6c28aaSamw zap_name_t *zn; 1279fa9e4066Sahrens 1280ae972795SMatthew Ahrens err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, FALSE, FTAG, &zap); 1281fa9e4066Sahrens if (err) 1282fa9e4066Sahrens return (err); 1283da6c28aaSamw zn = zap_name_alloc(zap, name, mt); 1284da6c28aaSamw if (zn == NULL) { 1285ae972795SMatthew Ahrens zap_unlockdir(zap, FTAG); 1286be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 1287da6c28aaSamw } 1288fa9e4066Sahrens if (!zap->zap_ismicro) { 1289da6c28aaSamw err = fzap_remove(zn, tx); 1290fa9e4066Sahrens } else { 1291da6c28aaSamw mze = mze_find(zn); 1292fa9e4066Sahrens if (mze == NULL) { 1293be6fd75aSMatthew Ahrens err = SET_ERROR(ENOENT); 1294fa9e4066Sahrens } else { 1295fa9e4066Sahrens zap->zap_m.zap_num_entries--; 1296c1379625SJustin T. Gibbs bzero(&zap_m_phys(zap)->mz_chunk[mze->mze_chunkid], 1297fa9e4066Sahrens sizeof (mzap_ent_phys_t)); 1298fa9e4066Sahrens mze_remove(zap, mze); 1299fa9e4066Sahrens } 1300fa9e4066Sahrens } 1301da6c28aaSamw zap_name_free(zn); 1302ae972795SMatthew Ahrens zap_unlockdir(zap, FTAG); 1303fa9e4066Sahrens return (err); 1304fa9e4066Sahrens } 1305fa9e4066Sahrens 1306b24ab676SJeff Bonwick int 1307b24ab676SJeff Bonwick zap_remove_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, 1308b24ab676SJeff Bonwick int key_numints, dmu_tx_t *tx) 1309b24ab676SJeff Bonwick { 1310b24ab676SJeff Bonwick zap_t *zap; 1311b24ab676SJeff Bonwick int err; 1312b24ab676SJeff Bonwick zap_name_t *zn; 1313b24ab676SJeff Bonwick 1314ae972795SMatthew Ahrens err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, FALSE, FTAG, &zap); 1315b24ab676SJeff Bonwick if (err) 1316b24ab676SJeff Bonwick return (err); 1317b24ab676SJeff Bonwick zn = zap_name_alloc_uint64(zap, key, key_numints); 1318b24ab676SJeff Bonwick if (zn == NULL) { 1319ae972795SMatthew Ahrens zap_unlockdir(zap, FTAG); 1320be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 1321b24ab676SJeff Bonwick } 1322b24ab676SJeff Bonwick err = fzap_remove(zn, tx); 1323b24ab676SJeff Bonwick zap_name_free(zn); 1324ae972795SMatthew Ahrens zap_unlockdir(zap, FTAG); 1325b24ab676SJeff Bonwick return (err); 1326b24ab676SJeff Bonwick } 1327b24ab676SJeff Bonwick 1328fa9e4066Sahrens /* 1329fa9e4066Sahrens * Routines for iterating over the attributes. 1330fa9e4066Sahrens */ 1331fa9e4066Sahrens 1332fa9e4066Sahrens void 1333fa9e4066Sahrens zap_cursor_init_serialized(zap_cursor_t *zc, objset_t *os, uint64_t zapobj, 1334fa9e4066Sahrens uint64_t serialized) 1335fa9e4066Sahrens { 1336fa9e4066Sahrens zc->zc_objset = os; 133787e5029aSahrens zc->zc_zap = NULL; 133887e5029aSahrens zc->zc_leaf = NULL; 1339fa9e4066Sahrens zc->zc_zapobj = zapobj; 1340b24ab676SJeff Bonwick zc->zc_serialized = serialized; 1341b24ab676SJeff Bonwick zc->zc_hash = 0; 1342b24ab676SJeff Bonwick zc->zc_cd = 0; 1343fa9e4066Sahrens } 1344fa9e4066Sahrens 134587e5029aSahrens void 134687e5029aSahrens zap_cursor_init(zap_cursor_t *zc, objset_t *os, uint64_t zapobj) 134787e5029aSahrens { 134887e5029aSahrens zap_cursor_init_serialized(zc, os, zapobj, 0); 134987e5029aSahrens } 135087e5029aSahrens 135187e5029aSahrens void 135287e5029aSahrens zap_cursor_fini(zap_cursor_t *zc) 135387e5029aSahrens { 135487e5029aSahrens if (zc->zc_zap) { 135587e5029aSahrens rw_enter(&zc->zc_zap->zap_rwlock, RW_READER); 1356ae972795SMatthew Ahrens zap_unlockdir(zc->zc_zap, NULL); 135787e5029aSahrens zc->zc_zap = NULL; 135887e5029aSahrens } 135987e5029aSahrens if (zc->zc_leaf) { 136087e5029aSahrens rw_enter(&zc->zc_leaf->l_rwlock, RW_READER); 136187e5029aSahrens zap_put_leaf(zc->zc_leaf); 136287e5029aSahrens zc->zc_leaf = NULL; 136387e5029aSahrens } 136487e5029aSahrens zc->zc_objset = NULL; 136587e5029aSahrens } 136687e5029aSahrens 1367fa9e4066Sahrens uint64_t 1368fa9e4066Sahrens zap_cursor_serialize(zap_cursor_t *zc) 1369fa9e4066Sahrens { 1370fa9e4066Sahrens if (zc->zc_hash == -1ULL) 1371fa9e4066Sahrens return (-1ULL); 1372b24ab676SJeff Bonwick if (zc->zc_zap == NULL) 1373b24ab676SJeff Bonwick return (zc->zc_serialized); 1374b24ab676SJeff Bonwick ASSERT((zc->zc_hash & zap_maxcd(zc->zc_zap)) == 0); 1375b24ab676SJeff Bonwick ASSERT(zc->zc_cd < zap_maxcd(zc->zc_zap)); 1376b24ab676SJeff Bonwick 1377b24ab676SJeff Bonwick /* 1378b24ab676SJeff Bonwick * We want to keep the high 32 bits of the cursor zero if we can, so 1379b24ab676SJeff Bonwick * that 32-bit programs can access this. So usually use a small 1380b24ab676SJeff Bonwick * (28-bit) hash value so we can fit 4 bits of cd into the low 32-bits 1381b24ab676SJeff Bonwick * of the cursor. 1382b24ab676SJeff Bonwick * 1383b24ab676SJeff Bonwick * [ collision differentiator | zap_hashbits()-bit hash value ] 1384b24ab676SJeff Bonwick */ 1385b24ab676SJeff Bonwick return ((zc->zc_hash >> (64 - zap_hashbits(zc->zc_zap))) | 1386b24ab676SJeff Bonwick ((uint64_t)zc->zc_cd << zap_hashbits(zc->zc_zap))); 1387fa9e4066Sahrens } 1388fa9e4066Sahrens 1389fa9e4066Sahrens int 1390fa9e4066Sahrens zap_cursor_retrieve(zap_cursor_t *zc, zap_attribute_t *za) 1391fa9e4066Sahrens { 1392fa9e4066Sahrens int err; 1393fa9e4066Sahrens avl_index_t idx; 1394fa9e4066Sahrens mzap_ent_t mze_tofind; 1395fa9e4066Sahrens mzap_ent_t *mze; 1396fa9e4066Sahrens 1397fa9e4066Sahrens if (zc->zc_hash == -1ULL) 1398be6fd75aSMatthew Ahrens return (SET_ERROR(ENOENT)); 1399fa9e4066Sahrens 140087e5029aSahrens if (zc->zc_zap == NULL) { 1401b24ab676SJeff Bonwick int hb; 140287e5029aSahrens err = zap_lockdir(zc->zc_objset, zc->zc_zapobj, NULL, 1403ae972795SMatthew Ahrens RW_READER, TRUE, FALSE, NULL, &zc->zc_zap); 140487e5029aSahrens if (err) 140587e5029aSahrens return (err); 1406b24ab676SJeff Bonwick 1407b24ab676SJeff Bonwick /* 1408b24ab676SJeff Bonwick * To support zap_cursor_init_serialized, advance, retrieve, 1409b24ab676SJeff Bonwick * we must add to the existing zc_cd, which may already 1410b24ab676SJeff Bonwick * be 1 due to the zap_cursor_advance. 1411b24ab676SJeff Bonwick */ 1412b24ab676SJeff Bonwick ASSERT(zc->zc_hash == 0); 1413b24ab676SJeff Bonwick hb = zap_hashbits(zc->zc_zap); 1414b24ab676SJeff Bonwick zc->zc_hash = zc->zc_serialized << (64 - hb); 1415b24ab676SJeff Bonwick zc->zc_cd += zc->zc_serialized >> hb; 1416b24ab676SJeff Bonwick if (zc->zc_cd >= zap_maxcd(zc->zc_zap)) /* corrupt serialized */ 1417b24ab676SJeff Bonwick zc->zc_cd = 0; 141887e5029aSahrens } else { 141987e5029aSahrens rw_enter(&zc->zc_zap->zap_rwlock, RW_READER); 142087e5029aSahrens } 142187e5029aSahrens if (!zc->zc_zap->zap_ismicro) { 142287e5029aSahrens err = fzap_cursor_retrieve(zc->zc_zap, zc, za); 1423fa9e4066Sahrens } else { 1424fa9e4066Sahrens mze_tofind.mze_hash = zc->zc_hash; 14253f9d6ad7SLin Ling mze_tofind.mze_cd = zc->zc_cd; 1426fa9e4066Sahrens 142787e5029aSahrens mze = avl_find(&zc->zc_zap->zap_m.zap_avl, &mze_tofind, &idx); 142887e5029aSahrens if (mze == NULL) { 142987e5029aSahrens mze = avl_nearest(&zc->zc_zap->zap_m.zap_avl, 143087e5029aSahrens idx, AVL_AFTER); 143187e5029aSahrens } 1432fa9e4066Sahrens if (mze) { 14333f9d6ad7SLin Ling mzap_ent_phys_t *mzep = MZE_PHYS(zc->zc_zap, mze); 14343f9d6ad7SLin Ling ASSERT3U(mze->mze_cd, ==, mzep->mze_cd); 1435da6c28aaSamw za->za_normalization_conflict = 1436da6c28aaSamw mzap_normalization_conflict(zc->zc_zap, NULL, mze); 1437fa9e4066Sahrens za->za_integer_length = 8; 1438fa9e4066Sahrens za->za_num_integers = 1; 14393f9d6ad7SLin Ling za->za_first_integer = mzep->mze_value; 14403f9d6ad7SLin Ling (void) strcpy(za->za_name, mzep->mze_name); 1441fa9e4066Sahrens zc->zc_hash = mze->mze_hash; 14423f9d6ad7SLin Ling zc->zc_cd = mze->mze_cd; 1443fa9e4066Sahrens err = 0; 1444fa9e4066Sahrens } else { 1445fa9e4066Sahrens zc->zc_hash = -1ULL; 1446be6fd75aSMatthew Ahrens err = SET_ERROR(ENOENT); 1447fa9e4066Sahrens } 1448fa9e4066Sahrens } 144987e5029aSahrens rw_exit(&zc->zc_zap->zap_rwlock); 1450fa9e4066Sahrens return (err); 1451fa9e4066Sahrens } 1452fa9e4066Sahrens 1453fa9e4066Sahrens void 1454fa9e4066Sahrens zap_cursor_advance(zap_cursor_t *zc) 1455fa9e4066Sahrens { 1456fa9e4066Sahrens if (zc->zc_hash == -1ULL) 1457fa9e4066Sahrens return; 1458fa9e4066Sahrens zc->zc_cd++; 1459fa9e4066Sahrens } 1460fa9e4066Sahrens 1461fa9e4066Sahrens int 1462fa9e4066Sahrens zap_get_stats(objset_t *os, uint64_t zapobj, zap_stats_t *zs) 1463fa9e4066Sahrens { 1464fa9e4066Sahrens int err; 1465fa9e4066Sahrens zap_t *zap; 1466fa9e4066Sahrens 1467ae972795SMatthew Ahrens err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, FTAG, &zap); 1468fa9e4066Sahrens if (err) 1469fa9e4066Sahrens return (err); 1470fa9e4066Sahrens 1471fa9e4066Sahrens bzero(zs, sizeof (zap_stats_t)); 1472fa9e4066Sahrens 1473fa9e4066Sahrens if (zap->zap_ismicro) { 1474fa9e4066Sahrens zs->zs_blocksize = zap->zap_dbuf->db_size; 1475fa9e4066Sahrens zs->zs_num_entries = zap->zap_m.zap_num_entries; 1476fa9e4066Sahrens zs->zs_num_blocks = 1; 1477fa9e4066Sahrens } else { 1478fa9e4066Sahrens fzap_get_stats(zap, zs); 1479fa9e4066Sahrens } 1480ae972795SMatthew Ahrens zap_unlockdir(zap, FTAG); 1481fa9e4066Sahrens return (0); 1482fa9e4066Sahrens } 14833d692628SSanjeev Bagewadi 14843d692628SSanjeev Bagewadi int 148579d72832SMatthew Ahrens zap_count_write_by_dnode(dnode_t *dn, const char *name, int add, 14860c779ad4SMatthew Ahrens refcount_t *towrite, refcount_t *tooverwrite) 14873d692628SSanjeev Bagewadi { 14883d692628SSanjeev Bagewadi zap_t *zap; 14893d692628SSanjeev Bagewadi int err = 0; 14903d692628SSanjeev Bagewadi 14913d692628SSanjeev Bagewadi /* 14923d692628SSanjeev Bagewadi * Since, we don't have a name, we cannot figure out which blocks will 14933d692628SSanjeev Bagewadi * be affected in this operation. So, account for the worst case : 14943d692628SSanjeev Bagewadi * - 3 blocks overwritten: target leaf, ptrtbl block, header block 14953d692628SSanjeev Bagewadi * - 4 new blocks written if adding: 14960c779ad4SMatthew Ahrens * - 2 blocks for possibly split leaves, 14970c779ad4SMatthew Ahrens * - 2 grown ptrtbl blocks 14983d692628SSanjeev Bagewadi * 1499ae972795SMatthew Ahrens * This also accommodates the case where an add operation to a fairly 15003d692628SSanjeev Bagewadi * large microzap results in a promotion to fatzap. 15013d692628SSanjeev Bagewadi */ 15023d692628SSanjeev Bagewadi if (name == NULL) { 15030c779ad4SMatthew Ahrens (void) refcount_add_many(towrite, 15040c779ad4SMatthew Ahrens (3 + (add ? 4 : 0)) * SPA_OLD_MAXBLOCKSIZE, FTAG); 15053d692628SSanjeev Bagewadi return (err); 15063d692628SSanjeev Bagewadi } 15073d692628SSanjeev Bagewadi 15083d692628SSanjeev Bagewadi /* 150919b94df9SMatthew Ahrens * We lock the zap with adding == FALSE. Because, if we pass 15103d692628SSanjeev Bagewadi * the actual value of add, it could trigger a mzap_upgrade(). 15113d692628SSanjeev Bagewadi * At present we are just evaluating the possibility of this operation 1512ae972795SMatthew Ahrens * and hence we do not want to trigger an upgrade. 15133d692628SSanjeev Bagewadi */ 151479d72832SMatthew Ahrens err = zap_lockdir_by_dnode(dn, NULL, RW_READER, TRUE, FALSE, 1515ae972795SMatthew Ahrens FTAG, &zap); 1516ae972795SMatthew Ahrens if (err != 0) 15173d692628SSanjeev Bagewadi return (err); 15183d692628SSanjeev Bagewadi 15193d692628SSanjeev Bagewadi if (!zap->zap_ismicro) { 1520*1c17160aSKevin Crowe zap_name_t *zn = zap_name_alloc(zap, name, 0); 15213d692628SSanjeev Bagewadi if (zn) { 15223d692628SSanjeev Bagewadi err = fzap_count_write(zn, add, towrite, 15233d692628SSanjeev Bagewadi tooverwrite); 15243d692628SSanjeev Bagewadi zap_name_free(zn); 15253d692628SSanjeev Bagewadi } else { 15263d692628SSanjeev Bagewadi /* 15273d692628SSanjeev Bagewadi * We treat this case as similar to (name == NULL) 15283d692628SSanjeev Bagewadi */ 15290c779ad4SMatthew Ahrens (void) refcount_add_many(towrite, 15300c779ad4SMatthew Ahrens (3 + (add ? 4 : 0)) * SPA_OLD_MAXBLOCKSIZE, FTAG); 15313d692628SSanjeev Bagewadi } 15323d692628SSanjeev Bagewadi } else { 1533720d1aa1SSanjeev Bagewadi /* 1534720d1aa1SSanjeev Bagewadi * We are here if (name != NULL) and this is a micro-zap. 1535720d1aa1SSanjeev Bagewadi * We account for the header block depending on whether it 1536720d1aa1SSanjeev Bagewadi * is freeable. 1537720d1aa1SSanjeev Bagewadi * 1538720d1aa1SSanjeev Bagewadi * Incase of an add-operation it is hard to find out 1539720d1aa1SSanjeev Bagewadi * if this add will promote this microzap to fatzap. 1540720d1aa1SSanjeev Bagewadi * Hence, we consider the worst case and account for the 1541720d1aa1SSanjeev Bagewadi * blocks assuming this microzap would be promoted to a 1542720d1aa1SSanjeev Bagewadi * fatzap. 1543720d1aa1SSanjeev Bagewadi * 1544720d1aa1SSanjeev Bagewadi * 1 block overwritten : header block 1545720d1aa1SSanjeev Bagewadi * 4 new blocks written : 2 new split leaf, 2 grown 1546720d1aa1SSanjeev Bagewadi * ptrtbl blocks 1547720d1aa1SSanjeev Bagewadi */ 15480c779ad4SMatthew Ahrens if (dmu_buf_freeable(zap->zap_dbuf)) { 15490c779ad4SMatthew Ahrens (void) refcount_add_many(tooverwrite, 15500c779ad4SMatthew Ahrens MZAP_MAX_BLKSZ, FTAG); 15510c779ad4SMatthew Ahrens } else { 15520c779ad4SMatthew Ahrens (void) refcount_add_many(towrite, 15530c779ad4SMatthew Ahrens MZAP_MAX_BLKSZ, FTAG); 15540c779ad4SMatthew Ahrens } 1555720d1aa1SSanjeev Bagewadi 1556720d1aa1SSanjeev Bagewadi if (add) { 15570c779ad4SMatthew Ahrens (void) refcount_add_many(towrite, 15580c779ad4SMatthew Ahrens 4 * MZAP_MAX_BLKSZ, FTAG); 15593d692628SSanjeev Bagewadi } 15603d692628SSanjeev Bagewadi } 15613d692628SSanjeev Bagewadi 1562ae972795SMatthew Ahrens zap_unlockdir(zap, FTAG); 15633d692628SSanjeev Bagewadi return (err); 15643d692628SSanjeev Bagewadi } 1565