1fa9e4066Sahrens /* 2fa9e4066Sahrens * CDDL HEADER START 3fa9e4066Sahrens * 4fa9e4066Sahrens * The contents of this file are subject to the terms of the 5f65e61c0Sahrens * Common Development and Distribution License (the "License"). 6f65e61c0Sahrens * You may not use this file except in compliance with the License. 7fa9e4066Sahrens * 8fa9e4066Sahrens * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9fa9e4066Sahrens * or http://www.opensolaris.org/os/licensing. 10fa9e4066Sahrens * See the License for the specific language governing permissions 11fa9e4066Sahrens * and limitations under the License. 12fa9e4066Sahrens * 13fa9e4066Sahrens * When distributing Covered Code, include this CDDL HEADER in each 14fa9e4066Sahrens * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15fa9e4066Sahrens * If applicable, add the following below this CDDL HEADER, with the 16fa9e4066Sahrens * fields enclosed by brackets "[]" replaced with your own identifying 17fa9e4066Sahrens * information: Portions Copyright [yyyy] [name of copyright owner] 18fa9e4066Sahrens * 19fa9e4066Sahrens * CDDL HEADER END 20fa9e4066Sahrens */ 21fa9e4066Sahrens /* 2247cb52daSJeff Bonwick * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 23*ae972795SMatthew Ahrens * Copyright (c) 2011, 2016 by Delphix. All rights reserved. 24bc9014e6SJustin Gibbs * Copyright (c) 2014 Spectra Logic Corporation, All rights reserved. 25c3d26abcSMatthew Ahrens * Copyright (c) 2014 Integros [integros.com] 26fa9e4066Sahrens */ 27fa9e4066Sahrens 28b24ab676SJeff Bonwick #include <sys/zio.h> 29fa9e4066Sahrens #include <sys/spa.h> 30fa9e4066Sahrens #include <sys/dmu.h> 31fa9e4066Sahrens #include <sys/zfs_context.h> 32fa9e4066Sahrens #include <sys/zap.h> 33ea8dc4b6Seschrock #include <sys/refcount.h> 34fa9e4066Sahrens #include <sys/zap_impl.h> 3587e5029aSahrens #include <sys/zap_leaf.h> 36fa9e4066Sahrens #include <sys/avl.h> 373f9d6ad7SLin Ling #include <sys/arc.h> 38b5152584SMatthew Ahrens #include <sys/dmu_objset.h> 39de8267e0Stimh 40de8267e0Stimh #ifdef _KERNEL 41de8267e0Stimh #include <sys/sunddi.h> 42de8267e0Stimh #endif 43fa9e4066Sahrens 44c1379625SJustin T. Gibbs extern inline mzap_phys_t *zap_m_phys(zap_t *zap); 45c1379625SJustin T. Gibbs 46*ae972795SMatthew Ahrens static int mzap_upgrade(zap_t **zapp, 47*ae972795SMatthew Ahrens void *tag, dmu_tx_t *tx, zap_flags_t flags); 48fa9e4066Sahrens 49b24ab676SJeff Bonwick uint64_t 50b24ab676SJeff Bonwick zap_getflags(zap_t *zap) 51b24ab676SJeff Bonwick { 52b24ab676SJeff Bonwick if (zap->zap_ismicro) 53b24ab676SJeff Bonwick return (0); 54c1379625SJustin T. Gibbs return (zap_f_phys(zap)->zap_flags); 55b24ab676SJeff Bonwick } 56b24ab676SJeff Bonwick 57b24ab676SJeff Bonwick int 58b24ab676SJeff Bonwick zap_hashbits(zap_t *zap) 59b24ab676SJeff Bonwick { 60b24ab676SJeff Bonwick if (zap_getflags(zap) & ZAP_FLAG_HASH64) 61b24ab676SJeff Bonwick return (48); 62b24ab676SJeff Bonwick else 63b24ab676SJeff Bonwick return (28); 64b24ab676SJeff Bonwick } 65b24ab676SJeff Bonwick 66b24ab676SJeff Bonwick uint32_t 67b24ab676SJeff Bonwick zap_maxcd(zap_t *zap) 68b24ab676SJeff Bonwick { 69b24ab676SJeff Bonwick if (zap_getflags(zap) & ZAP_FLAG_HASH64) 70b24ab676SJeff Bonwick return ((1<<16)-1); 71b24ab676SJeff Bonwick else 72b24ab676SJeff Bonwick return (-1U); 73b24ab676SJeff Bonwick } 74fa9e4066Sahrens 75da6c28aaSamw static uint64_t 76b24ab676SJeff Bonwick zap_hash(zap_name_t *zn) 77da6c28aaSamw { 78b24ab676SJeff Bonwick zap_t *zap = zn->zn_zap; 79b24ab676SJeff Bonwick uint64_t h = 0; 80da6c28aaSamw 81b24ab676SJeff Bonwick if (zap_getflags(zap) & ZAP_FLAG_PRE_HASHED_KEY) { 82b24ab676SJeff Bonwick ASSERT(zap_getflags(zap) & ZAP_FLAG_UINT64_KEY); 83b24ab676SJeff Bonwick h = *(uint64_t *)zn->zn_key_orig; 84b24ab676SJeff Bonwick } else { 85b24ab676SJeff Bonwick h = zap->zap_salt; 86b24ab676SJeff Bonwick ASSERT(h != 0); 87b24ab676SJeff Bonwick ASSERT(zfs_crc64_table[128] == ZFS_CRC64_POLY); 88b24ab676SJeff Bonwick 89486ae710SMatthew Ahrens if (zap_getflags(zap) & ZAP_FLAG_UINT64_KEY) { 90486ae710SMatthew Ahrens int i; 91486ae710SMatthew Ahrens const uint64_t *wp = zn->zn_key_norm; 92486ae710SMatthew Ahrens 93486ae710SMatthew Ahrens ASSERT(zn->zn_key_intlen == 8); 94486ae710SMatthew Ahrens for (i = 0; i < zn->zn_key_norm_numints; wp++, i++) { 95486ae710SMatthew Ahrens int j; 96486ae710SMatthew Ahrens uint64_t word = *wp; 97486ae710SMatthew Ahrens 98486ae710SMatthew Ahrens for (j = 0; j < zn->zn_key_intlen; j++) { 99486ae710SMatthew Ahrens h = (h >> 8) ^ 100486ae710SMatthew Ahrens zfs_crc64_table[(h ^ word) & 0xFF]; 101486ae710SMatthew Ahrens word >>= NBBY; 102486ae710SMatthew Ahrens } 103486ae710SMatthew Ahrens } 104486ae710SMatthew Ahrens } else { 105486ae710SMatthew Ahrens int i, len; 106486ae710SMatthew Ahrens const uint8_t *cp = zn->zn_key_norm; 107486ae710SMatthew Ahrens 108486ae710SMatthew Ahrens /* 109486ae710SMatthew Ahrens * We previously stored the terminating null on 110486ae710SMatthew Ahrens * disk, but didn't hash it, so we need to 111486ae710SMatthew Ahrens * continue to not hash it. (The 112486ae710SMatthew Ahrens * zn_key_*_numints includes the terminating 113486ae710SMatthew Ahrens * null for non-binary keys.) 114486ae710SMatthew Ahrens */ 115486ae710SMatthew Ahrens len = zn->zn_key_norm_numints - 1; 116486ae710SMatthew Ahrens 117486ae710SMatthew Ahrens ASSERT(zn->zn_key_intlen == 1); 118486ae710SMatthew Ahrens for (i = 0; i < len; cp++, i++) { 119486ae710SMatthew Ahrens h = (h >> 8) ^ 120486ae710SMatthew Ahrens zfs_crc64_table[(h ^ *cp) & 0xFF]; 121486ae710SMatthew Ahrens } 122486ae710SMatthew Ahrens } 123b24ab676SJeff Bonwick } 124da6c28aaSamw /* 125b24ab676SJeff Bonwick * Don't use all 64 bits, since we need some in the cookie for 126b24ab676SJeff Bonwick * the collision differentiator. We MUST use the high bits, 127b24ab676SJeff Bonwick * since those are the ones that we first pay attention to when 128da6c28aaSamw * chosing the bucket. 129da6c28aaSamw */ 130b24ab676SJeff Bonwick h &= ~((1ULL << (64 - zap_hashbits(zap))) - 1); 131da6c28aaSamw 132b24ab676SJeff Bonwick return (h); 133da6c28aaSamw } 134da6c28aaSamw 135da6c28aaSamw static int 136da6c28aaSamw zap_normalize(zap_t *zap, const char *name, char *namenorm) 137da6c28aaSamw { 138da6c28aaSamw size_t inlen, outlen; 139da6c28aaSamw int err; 140da6c28aaSamw 141b24ab676SJeff Bonwick ASSERT(!(zap_getflags(zap) & ZAP_FLAG_UINT64_KEY)); 142b24ab676SJeff Bonwick 143da6c28aaSamw inlen = strlen(name) + 1; 144da6c28aaSamw outlen = ZAP_MAXNAMELEN; 145da6c28aaSamw 146da6c28aaSamw err = 0; 147da6c28aaSamw (void) u8_textprep_str((char *)name, &inlen, namenorm, &outlen, 148d05ba1e6STim Haley zap->zap_normflags | U8_TEXTPREP_IGNORE_NULL | 149d05ba1e6STim Haley U8_TEXTPREP_IGNORE_INVALID, U8_UNICODE_LATEST, &err); 150da6c28aaSamw 151da6c28aaSamw return (err); 152da6c28aaSamw } 153da6c28aaSamw 154da6c28aaSamw boolean_t 155da6c28aaSamw zap_match(zap_name_t *zn, const char *matchname) 156da6c28aaSamw { 157b24ab676SJeff Bonwick ASSERT(!(zap_getflags(zn->zn_zap) & ZAP_FLAG_UINT64_KEY)); 158b24ab676SJeff Bonwick 159da6c28aaSamw if (zn->zn_matchtype == MT_FIRST) { 160da6c28aaSamw char norm[ZAP_MAXNAMELEN]; 161da6c28aaSamw 162da6c28aaSamw if (zap_normalize(zn->zn_zap, matchname, norm) != 0) 163da6c28aaSamw return (B_FALSE); 164da6c28aaSamw 165b24ab676SJeff Bonwick return (strcmp(zn->zn_key_norm, norm) == 0); 166da6c28aaSamw } else { 167da6c28aaSamw /* MT_BEST or MT_EXACT */ 168b24ab676SJeff Bonwick return (strcmp(zn->zn_key_orig, matchname) == 0); 169da6c28aaSamw } 170da6c28aaSamw } 171da6c28aaSamw 172da6c28aaSamw void 173da6c28aaSamw zap_name_free(zap_name_t *zn) 174da6c28aaSamw { 175da6c28aaSamw kmem_free(zn, sizeof (zap_name_t)); 176da6c28aaSamw } 177da6c28aaSamw 178da6c28aaSamw zap_name_t * 179b24ab676SJeff Bonwick zap_name_alloc(zap_t *zap, const char *key, matchtype_t mt) 180da6c28aaSamw { 181da6c28aaSamw zap_name_t *zn = kmem_alloc(sizeof (zap_name_t), KM_SLEEP); 182da6c28aaSamw 183da6c28aaSamw zn->zn_zap = zap; 184b24ab676SJeff Bonwick zn->zn_key_intlen = sizeof (*key); 185b24ab676SJeff Bonwick zn->zn_key_orig = key; 186486ae710SMatthew Ahrens zn->zn_key_orig_numints = strlen(zn->zn_key_orig) + 1; 187da6c28aaSamw zn->zn_matchtype = mt; 188da6c28aaSamw if (zap->zap_normflags) { 189b24ab676SJeff Bonwick if (zap_normalize(zap, key, zn->zn_normbuf) != 0) { 190da6c28aaSamw zap_name_free(zn); 191da6c28aaSamw return (NULL); 192da6c28aaSamw } 193b24ab676SJeff Bonwick zn->zn_key_norm = zn->zn_normbuf; 194486ae710SMatthew Ahrens zn->zn_key_norm_numints = strlen(zn->zn_key_norm) + 1; 195da6c28aaSamw } else { 196da6c28aaSamw if (mt != MT_EXACT) { 197da6c28aaSamw zap_name_free(zn); 198da6c28aaSamw return (NULL); 199da6c28aaSamw } 200b24ab676SJeff Bonwick zn->zn_key_norm = zn->zn_key_orig; 201486ae710SMatthew Ahrens zn->zn_key_norm_numints = zn->zn_key_orig_numints; 202da6c28aaSamw } 203da6c28aaSamw 204b24ab676SJeff Bonwick zn->zn_hash = zap_hash(zn); 205b24ab676SJeff Bonwick return (zn); 206b24ab676SJeff Bonwick } 207b24ab676SJeff Bonwick 208b24ab676SJeff Bonwick zap_name_t * 209b24ab676SJeff Bonwick zap_name_alloc_uint64(zap_t *zap, const uint64_t *key, int numints) 210b24ab676SJeff Bonwick { 211b24ab676SJeff Bonwick zap_name_t *zn = kmem_alloc(sizeof (zap_name_t), KM_SLEEP); 212b24ab676SJeff Bonwick 213b24ab676SJeff Bonwick ASSERT(zap->zap_normflags == 0); 214b24ab676SJeff Bonwick zn->zn_zap = zap; 215b24ab676SJeff Bonwick zn->zn_key_intlen = sizeof (*key); 216b24ab676SJeff Bonwick zn->zn_key_orig = zn->zn_key_norm = key; 217486ae710SMatthew Ahrens zn->zn_key_orig_numints = zn->zn_key_norm_numints = numints; 218b24ab676SJeff Bonwick zn->zn_matchtype = MT_EXACT; 219b24ab676SJeff Bonwick 220b24ab676SJeff Bonwick zn->zn_hash = zap_hash(zn); 221da6c28aaSamw return (zn); 222da6c28aaSamw } 223da6c28aaSamw 224fa9e4066Sahrens static void 225fa9e4066Sahrens mzap_byteswap(mzap_phys_t *buf, size_t size) 226fa9e4066Sahrens { 227fa9e4066Sahrens int i, max; 228fa9e4066Sahrens buf->mz_block_type = BSWAP_64(buf->mz_block_type); 229fa9e4066Sahrens buf->mz_salt = BSWAP_64(buf->mz_salt); 230ab04eb8eStimh buf->mz_normflags = BSWAP_64(buf->mz_normflags); 231fa9e4066Sahrens max = (size / MZAP_ENT_LEN) - 1; 232fa9e4066Sahrens for (i = 0; i < max; i++) { 233fa9e4066Sahrens buf->mz_chunk[i].mze_value = 234fa9e4066Sahrens BSWAP_64(buf->mz_chunk[i].mze_value); 235fa9e4066Sahrens buf->mz_chunk[i].mze_cd = 236fa9e4066Sahrens BSWAP_32(buf->mz_chunk[i].mze_cd); 237fa9e4066Sahrens } 238fa9e4066Sahrens } 239fa9e4066Sahrens 240fa9e4066Sahrens void 241fa9e4066Sahrens zap_byteswap(void *buf, size_t size) 242fa9e4066Sahrens { 243fa9e4066Sahrens uint64_t block_type; 244fa9e4066Sahrens 245fa9e4066Sahrens block_type = *(uint64_t *)buf; 246fa9e4066Sahrens 2475ad82045Snd if (block_type == ZBT_MICRO || block_type == BSWAP_64(ZBT_MICRO)) { 248fa9e4066Sahrens /* ASSERT(magic == ZAP_LEAF_MAGIC); */ 249fa9e4066Sahrens mzap_byteswap(buf, size); 2505ad82045Snd } else { 251fa9e4066Sahrens fzap_byteswap(buf, size); 252fa9e4066Sahrens } 253fa9e4066Sahrens } 254fa9e4066Sahrens 255fa9e4066Sahrens static int 256fa9e4066Sahrens mze_compare(const void *arg1, const void *arg2) 257fa9e4066Sahrens { 258fa9e4066Sahrens const mzap_ent_t *mze1 = arg1; 259fa9e4066Sahrens const mzap_ent_t *mze2 = arg2; 260fa9e4066Sahrens 261fa9e4066Sahrens if (mze1->mze_hash > mze2->mze_hash) 262fa9e4066Sahrens return (+1); 263fa9e4066Sahrens if (mze1->mze_hash < mze2->mze_hash) 264fa9e4066Sahrens return (-1); 2653f9d6ad7SLin Ling if (mze1->mze_cd > mze2->mze_cd) 266fa9e4066Sahrens return (+1); 2673f9d6ad7SLin Ling if (mze1->mze_cd < mze2->mze_cd) 268fa9e4066Sahrens return (-1); 269fa9e4066Sahrens return (0); 270fa9e4066Sahrens } 271fa9e4066Sahrens 272fa9e4066Sahrens static void 2733f9d6ad7SLin Ling mze_insert(zap_t *zap, int chunkid, uint64_t hash) 274fa9e4066Sahrens { 275fa9e4066Sahrens mzap_ent_t *mze; 276fa9e4066Sahrens 277fa9e4066Sahrens ASSERT(zap->zap_ismicro); 278fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 279fa9e4066Sahrens 280fa9e4066Sahrens mze = kmem_alloc(sizeof (mzap_ent_t), KM_SLEEP); 281fa9e4066Sahrens mze->mze_chunkid = chunkid; 282fa9e4066Sahrens mze->mze_hash = hash; 2833f9d6ad7SLin Ling mze->mze_cd = MZE_PHYS(zap, mze)->mze_cd; 2843f9d6ad7SLin Ling ASSERT(MZE_PHYS(zap, mze)->mze_name[0] != 0); 285fa9e4066Sahrens avl_add(&zap->zap_m.zap_avl, mze); 286fa9e4066Sahrens } 287fa9e4066Sahrens 288fa9e4066Sahrens static mzap_ent_t * 289da6c28aaSamw mze_find(zap_name_t *zn) 290fa9e4066Sahrens { 291fa9e4066Sahrens mzap_ent_t mze_tofind; 292fa9e4066Sahrens mzap_ent_t *mze; 293fa9e4066Sahrens avl_index_t idx; 294da6c28aaSamw avl_tree_t *avl = &zn->zn_zap->zap_m.zap_avl; 295fa9e4066Sahrens 296da6c28aaSamw ASSERT(zn->zn_zap->zap_ismicro); 297da6c28aaSamw ASSERT(RW_LOCK_HELD(&zn->zn_zap->zap_rwlock)); 298fa9e4066Sahrens 299da6c28aaSamw mze_tofind.mze_hash = zn->zn_hash; 3003f9d6ad7SLin Ling mze_tofind.mze_cd = 0; 301fa9e4066Sahrens 302da6c28aaSamw again: 303fa9e4066Sahrens mze = avl_find(avl, &mze_tofind, &idx); 304fa9e4066Sahrens if (mze == NULL) 305fa9e4066Sahrens mze = avl_nearest(avl, idx, AVL_AFTER); 306da6c28aaSamw for (; mze && mze->mze_hash == zn->zn_hash; mze = AVL_NEXT(avl, mze)) { 3073f9d6ad7SLin Ling ASSERT3U(mze->mze_cd, ==, MZE_PHYS(zn->zn_zap, mze)->mze_cd); 3083f9d6ad7SLin Ling if (zap_match(zn, MZE_PHYS(zn->zn_zap, mze)->mze_name)) 309fa9e4066Sahrens return (mze); 310fa9e4066Sahrens } 311da6c28aaSamw if (zn->zn_matchtype == MT_BEST) { 312da6c28aaSamw zn->zn_matchtype = MT_FIRST; 313da6c28aaSamw goto again; 314da6c28aaSamw } 315fa9e4066Sahrens return (NULL); 316fa9e4066Sahrens } 317fa9e4066Sahrens 318fa9e4066Sahrens static uint32_t 319fa9e4066Sahrens mze_find_unused_cd(zap_t *zap, uint64_t hash) 320fa9e4066Sahrens { 321fa9e4066Sahrens mzap_ent_t mze_tofind; 322fa9e4066Sahrens mzap_ent_t *mze; 323fa9e4066Sahrens avl_index_t idx; 324fa9e4066Sahrens avl_tree_t *avl = &zap->zap_m.zap_avl; 325fa9e4066Sahrens uint32_t cd; 326fa9e4066Sahrens 327fa9e4066Sahrens ASSERT(zap->zap_ismicro); 328fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 329fa9e4066Sahrens 330fa9e4066Sahrens mze_tofind.mze_hash = hash; 3313f9d6ad7SLin Ling mze_tofind.mze_cd = 0; 332fa9e4066Sahrens 333fa9e4066Sahrens cd = 0; 334fa9e4066Sahrens for (mze = avl_find(avl, &mze_tofind, &idx); 335fa9e4066Sahrens mze && mze->mze_hash == hash; mze = AVL_NEXT(avl, mze)) { 3363f9d6ad7SLin Ling if (mze->mze_cd != cd) 337fa9e4066Sahrens break; 338fa9e4066Sahrens cd++; 339fa9e4066Sahrens } 340fa9e4066Sahrens 341fa9e4066Sahrens return (cd); 342fa9e4066Sahrens } 343fa9e4066Sahrens 344fa9e4066Sahrens static void 345fa9e4066Sahrens mze_remove(zap_t *zap, mzap_ent_t *mze) 346fa9e4066Sahrens { 347fa9e4066Sahrens ASSERT(zap->zap_ismicro); 348fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 349fa9e4066Sahrens 350fa9e4066Sahrens avl_remove(&zap->zap_m.zap_avl, mze); 351fa9e4066Sahrens kmem_free(mze, sizeof (mzap_ent_t)); 352fa9e4066Sahrens } 353fa9e4066Sahrens 354fa9e4066Sahrens static void 355fa9e4066Sahrens mze_destroy(zap_t *zap) 356fa9e4066Sahrens { 357fa9e4066Sahrens mzap_ent_t *mze; 358fa9e4066Sahrens void *avlcookie = NULL; 359fa9e4066Sahrens 360fa9e4066Sahrens while (mze = avl_destroy_nodes(&zap->zap_m.zap_avl, &avlcookie)) 361fa9e4066Sahrens kmem_free(mze, sizeof (mzap_ent_t)); 362fa9e4066Sahrens avl_destroy(&zap->zap_m.zap_avl); 363fa9e4066Sahrens } 364fa9e4066Sahrens 365fa9e4066Sahrens static zap_t * 366fa9e4066Sahrens mzap_open(objset_t *os, uint64_t obj, dmu_buf_t *db) 367fa9e4066Sahrens { 368fa9e4066Sahrens zap_t *winner; 369fa9e4066Sahrens zap_t *zap; 370fa9e4066Sahrens int i; 37102525cd0SChunwei Chen uint64_t *zap_hdr = (uint64_t *)db->db_data; 37202525cd0SChunwei Chen uint64_t zap_block_type = zap_hdr[0]; 37302525cd0SChunwei Chen uint64_t zap_magic = zap_hdr[1]; 374fa9e4066Sahrens 375fa9e4066Sahrens ASSERT3U(MZAP_ENT_LEN, ==, sizeof (mzap_ent_phys_t)); 376fa9e4066Sahrens 377fa9e4066Sahrens zap = kmem_zalloc(sizeof (zap_t), KM_SLEEP); 378fa9e4066Sahrens rw_init(&zap->zap_rwlock, 0, 0, 0); 379fa9e4066Sahrens rw_enter(&zap->zap_rwlock, RW_WRITER); 380fa9e4066Sahrens zap->zap_objset = os; 381fa9e4066Sahrens zap->zap_object = obj; 382fa9e4066Sahrens zap->zap_dbuf = db; 383fa9e4066Sahrens 38402525cd0SChunwei Chen if (zap_block_type != ZBT_MICRO) { 385fa9e4066Sahrens mutex_init(&zap->zap_f.zap_num_entries_mtx, 0, 0, 0); 386bf16b11eSMatthew Ahrens zap->zap_f.zap_block_shift = highbit64(db->db_size) - 1; 38702525cd0SChunwei Chen if (zap_block_type != ZBT_HEADER || zap_magic != ZAP_MAGIC) { 38802525cd0SChunwei Chen winner = NULL; /* No actual winner here... */ 38902525cd0SChunwei Chen goto handle_winner; 39002525cd0SChunwei Chen } 391fa9e4066Sahrens } else { 392fa9e4066Sahrens zap->zap_ismicro = TRUE; 393fa9e4066Sahrens } 394fa9e4066Sahrens 395fa9e4066Sahrens /* 396fa9e4066Sahrens * Make sure that zap_ismicro is set before we let others see 397fa9e4066Sahrens * it, because zap_lockdir() checks zap_ismicro without the lock 398fa9e4066Sahrens * held. 399fa9e4066Sahrens */ 400bc9014e6SJustin Gibbs dmu_buf_init_user(&zap->zap_dbu, zap_evict, &zap->zap_dbuf); 401bc9014e6SJustin Gibbs winner = dmu_buf_set_user(db, &zap->zap_dbu); 402fa9e4066Sahrens 40302525cd0SChunwei Chen if (winner != NULL) 40402525cd0SChunwei Chen goto handle_winner; 405fa9e4066Sahrens 406fa9e4066Sahrens if (zap->zap_ismicro) { 407c1379625SJustin T. Gibbs zap->zap_salt = zap_m_phys(zap)->mz_salt; 408c1379625SJustin T. Gibbs zap->zap_normflags = zap_m_phys(zap)->mz_normflags; 409fa9e4066Sahrens zap->zap_m.zap_num_chunks = db->db_size / MZAP_ENT_LEN - 1; 410fa9e4066Sahrens avl_create(&zap->zap_m.zap_avl, mze_compare, 411fa9e4066Sahrens sizeof (mzap_ent_t), offsetof(mzap_ent_t, mze_node)); 412fa9e4066Sahrens 413fa9e4066Sahrens for (i = 0; i < zap->zap_m.zap_num_chunks; i++) { 414fa9e4066Sahrens mzap_ent_phys_t *mze = 415c1379625SJustin T. Gibbs &zap_m_phys(zap)->mz_chunk[i]; 416fa9e4066Sahrens if (mze->mze_name[0]) { 417da6c28aaSamw zap_name_t *zn; 418da6c28aaSamw 419fa9e4066Sahrens zap->zap_m.zap_num_entries++; 420da6c28aaSamw zn = zap_name_alloc(zap, mze->mze_name, 421da6c28aaSamw MT_EXACT); 4223f9d6ad7SLin Ling mze_insert(zap, i, zn->zn_hash); 423da6c28aaSamw zap_name_free(zn); 424fa9e4066Sahrens } 425fa9e4066Sahrens } 426fa9e4066Sahrens } else { 427c1379625SJustin T. Gibbs zap->zap_salt = zap_f_phys(zap)->zap_salt; 428c1379625SJustin T. Gibbs zap->zap_normflags = zap_f_phys(zap)->zap_normflags; 429f65e61c0Sahrens 430f65e61c0Sahrens ASSERT3U(sizeof (struct zap_leaf_header), ==, 431f65e61c0Sahrens 2*ZAP_LEAF_CHUNKSIZE); 432f65e61c0Sahrens 433f65e61c0Sahrens /* 434f65e61c0Sahrens * The embedded pointer table should not overlap the 435f65e61c0Sahrens * other members. 436f65e61c0Sahrens */ 437f65e61c0Sahrens ASSERT3P(&ZAP_EMBEDDED_PTRTBL_ENT(zap, 0), >, 438c1379625SJustin T. Gibbs &zap_f_phys(zap)->zap_salt); 439f65e61c0Sahrens 440f65e61c0Sahrens /* 441f65e61c0Sahrens * The embedded pointer table should end at the end of 442f65e61c0Sahrens * the block 443f65e61c0Sahrens */ 444f65e61c0Sahrens ASSERT3U((uintptr_t)&ZAP_EMBEDDED_PTRTBL_ENT(zap, 445f65e61c0Sahrens 1<<ZAP_EMBEDDED_PTRTBL_SHIFT(zap)) - 446c1379625SJustin T. Gibbs (uintptr_t)zap_f_phys(zap), ==, 447f65e61c0Sahrens zap->zap_dbuf->db_size); 448fa9e4066Sahrens } 449fa9e4066Sahrens rw_exit(&zap->zap_rwlock); 450fa9e4066Sahrens return (zap); 45102525cd0SChunwei Chen 45202525cd0SChunwei Chen handle_winner: 45302525cd0SChunwei Chen rw_exit(&zap->zap_rwlock); 45402525cd0SChunwei Chen rw_destroy(&zap->zap_rwlock); 45502525cd0SChunwei Chen if (!zap->zap_ismicro) 45602525cd0SChunwei Chen mutex_destroy(&zap->zap_f.zap_num_entries_mtx); 45702525cd0SChunwei Chen kmem_free(zap, sizeof (zap_t)); 45802525cd0SChunwei Chen return (winner); 459fa9e4066Sahrens } 460fa9e4066Sahrens 461*ae972795SMatthew Ahrens static int 462*ae972795SMatthew Ahrens zap_lockdir_impl(dmu_buf_t *db, void *tag, dmu_tx_t *tx, 463c5f9e431Sahrens krw_t lti, boolean_t fatreader, boolean_t adding, zap_t **zapp) 464fa9e4066Sahrens { 465fa9e4066Sahrens zap_t *zap; 466fa9e4066Sahrens krw_t lt; 467fa9e4066Sahrens 468*ae972795SMatthew Ahrens ASSERT0(db->db_offset); 469*ae972795SMatthew Ahrens objset_t *os = dmu_buf_get_objset(db); 470*ae972795SMatthew Ahrens uint64_t obj = db->db_object; 471fa9e4066Sahrens 472*ae972795SMatthew Ahrens *zapp = NULL; 473fa9e4066Sahrens 474fa9e4066Sahrens #ifdef ZFS_DEBUG 475fa9e4066Sahrens { 476fa9e4066Sahrens dmu_object_info_t doi; 477fa9e4066Sahrens dmu_object_info_from_db(db, &doi); 478ad135b5dSChristopher Siden ASSERT3U(DMU_OT_BYTESWAP(doi.doi_type), ==, DMU_BSWAP_ZAP); 479fa9e4066Sahrens } 480fa9e4066Sahrens #endif 481fa9e4066Sahrens 482fa9e4066Sahrens zap = dmu_buf_get_user(db); 48302525cd0SChunwei Chen if (zap == NULL) { 484fa9e4066Sahrens zap = mzap_open(os, obj, db); 48502525cd0SChunwei Chen if (zap == NULL) { 48602525cd0SChunwei Chen /* 48702525cd0SChunwei Chen * mzap_open() didn't like what it saw on-disk. 48802525cd0SChunwei Chen * Check for corruption! 48902525cd0SChunwei Chen */ 49002525cd0SChunwei Chen return (SET_ERROR(EIO)); 49102525cd0SChunwei Chen } 49202525cd0SChunwei Chen } 493fa9e4066Sahrens 494fa9e4066Sahrens /* 495fa9e4066Sahrens * We're checking zap_ismicro without the lock held, in order to 496fa9e4066Sahrens * tell what type of lock we want. Once we have some sort of 497fa9e4066Sahrens * lock, see if it really is the right type. In practice this 498fa9e4066Sahrens * can only be different if it was upgraded from micro to fat, 499fa9e4066Sahrens * and micro wanted WRITER but fat only needs READER. 500fa9e4066Sahrens */ 501fa9e4066Sahrens lt = (!zap->zap_ismicro && fatreader) ? RW_READER : lti; 502fa9e4066Sahrens rw_enter(&zap->zap_rwlock, lt); 503fa9e4066Sahrens if (lt != ((!zap->zap_ismicro && fatreader) ? RW_READER : lti)) { 504fa9e4066Sahrens /* it was upgraded, now we only need reader */ 505fa9e4066Sahrens ASSERT(lt == RW_WRITER); 506fa9e4066Sahrens ASSERT(RW_READER == 507fa9e4066Sahrens (!zap->zap_ismicro && fatreader) ? RW_READER : lti); 508fa9e4066Sahrens rw_downgrade(&zap->zap_rwlock); 509fa9e4066Sahrens lt = RW_READER; 510fa9e4066Sahrens } 511fa9e4066Sahrens 512fa9e4066Sahrens zap->zap_objset = os; 513fa9e4066Sahrens 514fa9e4066Sahrens if (lt == RW_WRITER) 515fa9e4066Sahrens dmu_buf_will_dirty(db, tx); 516fa9e4066Sahrens 517fa9e4066Sahrens ASSERT3P(zap->zap_dbuf, ==, db); 518fa9e4066Sahrens 519fa9e4066Sahrens ASSERT(!zap->zap_ismicro || 520fa9e4066Sahrens zap->zap_m.zap_num_entries <= zap->zap_m.zap_num_chunks); 521c5f9e431Sahrens if (zap->zap_ismicro && tx && adding && 522fa9e4066Sahrens zap->zap_m.zap_num_entries == zap->zap_m.zap_num_chunks) { 523fa9e4066Sahrens uint64_t newsz = db->db_size + SPA_MINBLOCKSIZE; 524fa9e4066Sahrens if (newsz > MZAP_MAX_BLKSZ) { 525fa9e4066Sahrens dprintf("upgrading obj %llu: num_entries=%u\n", 526fa9e4066Sahrens obj, zap->zap_m.zap_num_entries); 527fa9e4066Sahrens *zapp = zap; 528*ae972795SMatthew Ahrens int err = mzap_upgrade(zapp, tag, tx, 0); 529*ae972795SMatthew Ahrens if (err != 0) 530*ae972795SMatthew Ahrens rw_exit(&zap->zap_rwlock); 531*ae972795SMatthew Ahrens return (err); 532fa9e4066Sahrens } 533*ae972795SMatthew Ahrens VERIFY0(dmu_object_set_blocksize(os, obj, newsz, 0, tx)); 534fa9e4066Sahrens zap->zap_m.zap_num_chunks = 535fa9e4066Sahrens db->db_size / MZAP_ENT_LEN - 1; 536fa9e4066Sahrens } 537fa9e4066Sahrens 538fa9e4066Sahrens *zapp = zap; 539fa9e4066Sahrens return (0); 540fa9e4066Sahrens } 541fa9e4066Sahrens 542*ae972795SMatthew Ahrens int 543*ae972795SMatthew Ahrens zap_lockdir(objset_t *os, uint64_t obj, dmu_tx_t *tx, 544*ae972795SMatthew Ahrens krw_t lti, boolean_t fatreader, boolean_t adding, void *tag, zap_t **zapp) 545*ae972795SMatthew Ahrens { 546*ae972795SMatthew Ahrens dmu_buf_t *db; 547*ae972795SMatthew Ahrens int err; 548*ae972795SMatthew Ahrens 549*ae972795SMatthew Ahrens err = dmu_buf_hold(os, obj, 0, tag, &db, DMU_READ_NO_PREFETCH); 550*ae972795SMatthew Ahrens if (err != 0) 551*ae972795SMatthew Ahrens return (err); 552*ae972795SMatthew Ahrens err = zap_lockdir_impl(db, tag, tx, lti, fatreader, adding, zapp); 553*ae972795SMatthew Ahrens if (err != 0) 554*ae972795SMatthew Ahrens dmu_buf_rele(db, tag); 555*ae972795SMatthew Ahrens return (err); 556*ae972795SMatthew Ahrens } 557*ae972795SMatthew Ahrens 558fa9e4066Sahrens void 559*ae972795SMatthew Ahrens zap_unlockdir(zap_t *zap, void *tag) 560fa9e4066Sahrens { 561fa9e4066Sahrens rw_exit(&zap->zap_rwlock); 562*ae972795SMatthew Ahrens dmu_buf_rele(zap->zap_dbuf, tag); 563fa9e4066Sahrens } 564fa9e4066Sahrens 565ad860c82Sbonwick static int 566*ae972795SMatthew Ahrens mzap_upgrade(zap_t **zapp, void *tag, dmu_tx_t *tx, zap_flags_t flags) 567fa9e4066Sahrens { 568fa9e4066Sahrens mzap_phys_t *mzp; 569b24ab676SJeff Bonwick int i, sz, nchunks; 570b24ab676SJeff Bonwick int err = 0; 571ad860c82Sbonwick zap_t *zap = *zapp; 572fa9e4066Sahrens 573fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 574fa9e4066Sahrens 575fa9e4066Sahrens sz = zap->zap_dbuf->db_size; 576be3e2ab9SBrian Behlendorf mzp = zio_buf_alloc(sz); 577fa9e4066Sahrens bcopy(zap->zap_dbuf->db_data, mzp, sz); 578fa9e4066Sahrens nchunks = zap->zap_m.zap_num_chunks; 579fa9e4066Sahrens 580b24ab676SJeff Bonwick if (!flags) { 581b24ab676SJeff Bonwick err = dmu_object_set_blocksize(zap->zap_objset, zap->zap_object, 582b24ab676SJeff Bonwick 1ULL << fzap_default_block_shift, 0, tx); 583b24ab676SJeff Bonwick if (err) { 584be3e2ab9SBrian Behlendorf zio_buf_free(mzp, sz); 585b24ab676SJeff Bonwick return (err); 586b24ab676SJeff Bonwick } 587ad860c82Sbonwick } 588fa9e4066Sahrens 589fa9e4066Sahrens dprintf("upgrading obj=%llu with %u chunks\n", 590fa9e4066Sahrens zap->zap_object, nchunks); 591da6c28aaSamw /* XXX destroy the avl later, so we can use the stored hash value */ 592fa9e4066Sahrens mze_destroy(zap); 593fa9e4066Sahrens 594b24ab676SJeff Bonwick fzap_upgrade(zap, tx, flags); 595fa9e4066Sahrens 596fa9e4066Sahrens for (i = 0; i < nchunks; i++) { 597fa9e4066Sahrens mzap_ent_phys_t *mze = &mzp->mz_chunk[i]; 598da6c28aaSamw zap_name_t *zn; 599fa9e4066Sahrens if (mze->mze_name[0] == 0) 600fa9e4066Sahrens continue; 601fa9e4066Sahrens dprintf("adding %s=%llu\n", 602fa9e4066Sahrens mze->mze_name, mze->mze_value); 603da6c28aaSamw zn = zap_name_alloc(zap, mze->mze_name, MT_EXACT); 604*ae972795SMatthew Ahrens err = fzap_add_cd(zn, 8, 1, &mze->mze_value, mze->mze_cd, 605*ae972795SMatthew Ahrens tag, tx); 606ad860c82Sbonwick zap = zn->zn_zap; /* fzap_add_cd() may change zap */ 607da6c28aaSamw zap_name_free(zn); 608ad860c82Sbonwick if (err) 609ad860c82Sbonwick break; 610fa9e4066Sahrens } 611be3e2ab9SBrian Behlendorf zio_buf_free(mzp, sz); 612ad860c82Sbonwick *zapp = zap; 613ad860c82Sbonwick return (err); 614fa9e4066Sahrens } 615fa9e4066Sahrens 6162acef22dSMatthew Ahrens void 617b24ab676SJeff Bonwick mzap_create_impl(objset_t *os, uint64_t obj, int normflags, zap_flags_t flags, 618b24ab676SJeff Bonwick dmu_tx_t *tx) 619fa9e4066Sahrens { 620fa9e4066Sahrens dmu_buf_t *db; 621fa9e4066Sahrens mzap_phys_t *zp; 622fa9e4066Sahrens 62347cb52daSJeff Bonwick VERIFY(0 == dmu_buf_hold(os, obj, 0, FTAG, &db, DMU_READ_NO_PREFETCH)); 624fa9e4066Sahrens 625fa9e4066Sahrens #ifdef ZFS_DEBUG 626fa9e4066Sahrens { 627fa9e4066Sahrens dmu_object_info_t doi; 628fa9e4066Sahrens dmu_object_info_from_db(db, &doi); 629ad135b5dSChristopher Siden ASSERT3U(DMU_OT_BYTESWAP(doi.doi_type), ==, DMU_BSWAP_ZAP); 630fa9e4066Sahrens } 631fa9e4066Sahrens #endif 632fa9e4066Sahrens 633fa9e4066Sahrens dmu_buf_will_dirty(db, tx); 634fa9e4066Sahrens zp = db->db_data; 635fa9e4066Sahrens zp->mz_block_type = ZBT_MICRO; 636fa9e4066Sahrens zp->mz_salt = ((uintptr_t)db ^ (uintptr_t)tx ^ (obj << 1)) | 1ULL; 637da6c28aaSamw zp->mz_normflags = normflags; 638ea8dc4b6Seschrock dmu_buf_rele(db, FTAG); 639b24ab676SJeff Bonwick 640b24ab676SJeff Bonwick if (flags != 0) { 641b24ab676SJeff Bonwick zap_t *zap; 642b24ab676SJeff Bonwick /* Only fat zap supports flags; upgrade immediately. */ 643b24ab676SJeff Bonwick VERIFY(0 == zap_lockdir(os, obj, tx, RW_WRITER, 644*ae972795SMatthew Ahrens B_FALSE, B_FALSE, FTAG, &zap)); 645*ae972795SMatthew Ahrens VERIFY3U(0, ==, mzap_upgrade(&zap, FTAG, tx, flags)); 646*ae972795SMatthew Ahrens zap_unlockdir(zap, FTAG); 647b24ab676SJeff Bonwick } 648fa9e4066Sahrens } 649fa9e4066Sahrens 650fa9e4066Sahrens int 651fa9e4066Sahrens zap_create_claim(objset_t *os, uint64_t obj, dmu_object_type_t ot, 652fa9e4066Sahrens dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) 653da6c28aaSamw { 654da6c28aaSamw return (zap_create_claim_norm(os, obj, 655da6c28aaSamw 0, ot, bonustype, bonuslen, tx)); 656da6c28aaSamw } 657da6c28aaSamw 658da6c28aaSamw int 659da6c28aaSamw zap_create_claim_norm(objset_t *os, uint64_t obj, int normflags, 660da6c28aaSamw dmu_object_type_t ot, 661da6c28aaSamw dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) 662fa9e4066Sahrens { 663fa9e4066Sahrens int err; 664fa9e4066Sahrens 665fa9e4066Sahrens err = dmu_object_claim(os, obj, ot, 0, bonustype, bonuslen, tx); 666fa9e4066Sahrens if (err != 0) 667fa9e4066Sahrens return (err); 668b24ab676SJeff Bonwick mzap_create_impl(os, obj, normflags, 0, tx); 669fa9e4066Sahrens return (0); 670fa9e4066Sahrens } 671fa9e4066Sahrens 672fa9e4066Sahrens uint64_t 673fa9e4066Sahrens zap_create(objset_t *os, dmu_object_type_t ot, 674fa9e4066Sahrens dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) 675da6c28aaSamw { 676da6c28aaSamw return (zap_create_norm(os, 0, ot, bonustype, bonuslen, tx)); 677da6c28aaSamw } 678da6c28aaSamw 679da6c28aaSamw uint64_t 680da6c28aaSamw zap_create_norm(objset_t *os, int normflags, dmu_object_type_t ot, 681da6c28aaSamw dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) 682fa9e4066Sahrens { 683fa9e4066Sahrens uint64_t obj = dmu_object_alloc(os, ot, 0, bonustype, bonuslen, tx); 684fa9e4066Sahrens 685b24ab676SJeff Bonwick mzap_create_impl(os, obj, normflags, 0, tx); 686b24ab676SJeff Bonwick return (obj); 687b24ab676SJeff Bonwick } 688b24ab676SJeff Bonwick 689b24ab676SJeff Bonwick uint64_t 690b24ab676SJeff Bonwick zap_create_flags(objset_t *os, int normflags, zap_flags_t flags, 691b24ab676SJeff Bonwick dmu_object_type_t ot, int leaf_blockshift, int indirect_blockshift, 692b24ab676SJeff Bonwick dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) 693b24ab676SJeff Bonwick { 694b24ab676SJeff Bonwick uint64_t obj = dmu_object_alloc(os, ot, 0, bonustype, bonuslen, tx); 695b24ab676SJeff Bonwick 696b24ab676SJeff Bonwick ASSERT(leaf_blockshift >= SPA_MINBLOCKSHIFT && 697b5152584SMatthew Ahrens leaf_blockshift <= SPA_OLD_MAXBLOCKSHIFT && 698b24ab676SJeff Bonwick indirect_blockshift >= SPA_MINBLOCKSHIFT && 699b5152584SMatthew Ahrens indirect_blockshift <= SPA_OLD_MAXBLOCKSHIFT); 700b24ab676SJeff Bonwick 701b24ab676SJeff Bonwick VERIFY(dmu_object_set_blocksize(os, obj, 702b24ab676SJeff Bonwick 1ULL << leaf_blockshift, indirect_blockshift, tx) == 0); 703b24ab676SJeff Bonwick 704b24ab676SJeff Bonwick mzap_create_impl(os, obj, normflags, flags, tx); 705fa9e4066Sahrens return (obj); 706fa9e4066Sahrens } 707fa9e4066Sahrens 708fa9e4066Sahrens int 709fa9e4066Sahrens zap_destroy(objset_t *os, uint64_t zapobj, dmu_tx_t *tx) 710fa9e4066Sahrens { 711fa9e4066Sahrens /* 712fa9e4066Sahrens * dmu_object_free will free the object number and free the 713fa9e4066Sahrens * data. Freeing the data will cause our pageout function to be 714fa9e4066Sahrens * called, which will destroy our data (zap_leaf_t's and zap_t). 715fa9e4066Sahrens */ 716fa9e4066Sahrens 717fa9e4066Sahrens return (dmu_object_free(os, zapobj, tx)); 718fa9e4066Sahrens } 719fa9e4066Sahrens 720fa9e4066Sahrens void 721bc9014e6SJustin Gibbs zap_evict(void *dbu) 722fa9e4066Sahrens { 723bc9014e6SJustin Gibbs zap_t *zap = dbu; 724fa9e4066Sahrens 725fa9e4066Sahrens rw_destroy(&zap->zap_rwlock); 726fa9e4066Sahrens 727f65e61c0Sahrens if (zap->zap_ismicro) 728fa9e4066Sahrens mze_destroy(zap); 729c25056deSgw else 730c25056deSgw mutex_destroy(&zap->zap_f.zap_num_entries_mtx); 731fa9e4066Sahrens 732fa9e4066Sahrens kmem_free(zap, sizeof (zap_t)); 733fa9e4066Sahrens } 734fa9e4066Sahrens 735fa9e4066Sahrens int 736fa9e4066Sahrens zap_count(objset_t *os, uint64_t zapobj, uint64_t *count) 737fa9e4066Sahrens { 738fa9e4066Sahrens zap_t *zap; 739fa9e4066Sahrens int err; 740fa9e4066Sahrens 741*ae972795SMatthew Ahrens err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, FTAG, &zap); 742fa9e4066Sahrens if (err) 743fa9e4066Sahrens return (err); 744fa9e4066Sahrens if (!zap->zap_ismicro) { 745fa9e4066Sahrens err = fzap_count(zap, count); 746fa9e4066Sahrens } else { 747fa9e4066Sahrens *count = zap->zap_m.zap_num_entries; 748fa9e4066Sahrens } 749*ae972795SMatthew Ahrens zap_unlockdir(zap, FTAG); 750fa9e4066Sahrens return (err); 751fa9e4066Sahrens } 752fa9e4066Sahrens 753fa9e4066Sahrens /* 754da6c28aaSamw * zn may be NULL; if not specified, it will be computed if needed. 755da6c28aaSamw * See also the comment above zap_entry_normalization_conflict(). 756da6c28aaSamw */ 757da6c28aaSamw static boolean_t 758da6c28aaSamw mzap_normalization_conflict(zap_t *zap, zap_name_t *zn, mzap_ent_t *mze) 759da6c28aaSamw { 760da6c28aaSamw mzap_ent_t *other; 761da6c28aaSamw int direction = AVL_BEFORE; 762da6c28aaSamw boolean_t allocdzn = B_FALSE; 763da6c28aaSamw 764da6c28aaSamw if (zap->zap_normflags == 0) 765da6c28aaSamw return (B_FALSE); 766da6c28aaSamw 767da6c28aaSamw again: 768da6c28aaSamw for (other = avl_walk(&zap->zap_m.zap_avl, mze, direction); 769da6c28aaSamw other && other->mze_hash == mze->mze_hash; 770da6c28aaSamw other = avl_walk(&zap->zap_m.zap_avl, other, direction)) { 771da6c28aaSamw 772da6c28aaSamw if (zn == NULL) { 7733f9d6ad7SLin Ling zn = zap_name_alloc(zap, MZE_PHYS(zap, mze)->mze_name, 774da6c28aaSamw MT_FIRST); 775da6c28aaSamw allocdzn = B_TRUE; 776da6c28aaSamw } 7773f9d6ad7SLin Ling if (zap_match(zn, MZE_PHYS(zap, other)->mze_name)) { 778da6c28aaSamw if (allocdzn) 779da6c28aaSamw zap_name_free(zn); 780da6c28aaSamw return (B_TRUE); 781da6c28aaSamw } 782da6c28aaSamw } 783da6c28aaSamw 784da6c28aaSamw if (direction == AVL_BEFORE) { 785da6c28aaSamw direction = AVL_AFTER; 786da6c28aaSamw goto again; 787da6c28aaSamw } 788da6c28aaSamw 789da6c28aaSamw if (allocdzn) 790da6c28aaSamw zap_name_free(zn); 791da6c28aaSamw return (B_FALSE); 792da6c28aaSamw } 793da6c28aaSamw 794da6c28aaSamw /* 795da6c28aaSamw * Routines for manipulating attributes. 796fa9e4066Sahrens */ 797fa9e4066Sahrens 798fa9e4066Sahrens int 799fa9e4066Sahrens zap_lookup(objset_t *os, uint64_t zapobj, const char *name, 800fa9e4066Sahrens uint64_t integer_size, uint64_t num_integers, void *buf) 801da6c28aaSamw { 802da6c28aaSamw return (zap_lookup_norm(os, zapobj, name, integer_size, 803da6c28aaSamw num_integers, buf, MT_EXACT, NULL, 0, NULL)); 804da6c28aaSamw } 805da6c28aaSamw 806*ae972795SMatthew Ahrens static int 807*ae972795SMatthew Ahrens zap_lookup_impl(zap_t *zap, const char *name, 808da6c28aaSamw uint64_t integer_size, uint64_t num_integers, void *buf, 809da6c28aaSamw matchtype_t mt, char *realname, int rn_len, 810da6c28aaSamw boolean_t *ncp) 811fa9e4066Sahrens { 812*ae972795SMatthew Ahrens int err = 0; 813fa9e4066Sahrens mzap_ent_t *mze; 814da6c28aaSamw zap_name_t *zn; 815fa9e4066Sahrens 816da6c28aaSamw zn = zap_name_alloc(zap, name, mt); 817*ae972795SMatthew Ahrens if (zn == NULL) 818be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 819da6c28aaSamw 820fa9e4066Sahrens if (!zap->zap_ismicro) { 821da6c28aaSamw err = fzap_lookup(zn, integer_size, num_integers, buf, 822da6c28aaSamw realname, rn_len, ncp); 823fa9e4066Sahrens } else { 824da6c28aaSamw mze = mze_find(zn); 825fa9e4066Sahrens if (mze == NULL) { 826be6fd75aSMatthew Ahrens err = SET_ERROR(ENOENT); 827fa9e4066Sahrens } else { 828da6c28aaSamw if (num_integers < 1) { 829be6fd75aSMatthew Ahrens err = SET_ERROR(EOVERFLOW); 830da6c28aaSamw } else if (integer_size != 8) { 831be6fd75aSMatthew Ahrens err = SET_ERROR(EINVAL); 832da6c28aaSamw } else { 8333f9d6ad7SLin Ling *(uint64_t *)buf = 8343f9d6ad7SLin Ling MZE_PHYS(zap, mze)->mze_value; 835da6c28aaSamw (void) strlcpy(realname, 8363f9d6ad7SLin Ling MZE_PHYS(zap, mze)->mze_name, rn_len); 837da6c28aaSamw if (ncp) { 838da6c28aaSamw *ncp = mzap_normalization_conflict(zap, 839da6c28aaSamw zn, mze); 840da6c28aaSamw } 841da6c28aaSamw } 842fa9e4066Sahrens } 843fa9e4066Sahrens } 844da6c28aaSamw zap_name_free(zn); 845*ae972795SMatthew Ahrens return (err); 846*ae972795SMatthew Ahrens } 847*ae972795SMatthew Ahrens 848*ae972795SMatthew Ahrens int 849*ae972795SMatthew Ahrens zap_lookup_norm(objset_t *os, uint64_t zapobj, const char *name, 850*ae972795SMatthew Ahrens uint64_t integer_size, uint64_t num_integers, void *buf, 851*ae972795SMatthew Ahrens matchtype_t mt, char *realname, int rn_len, 852*ae972795SMatthew Ahrens boolean_t *ncp) 853*ae972795SMatthew Ahrens { 854*ae972795SMatthew Ahrens zap_t *zap; 855*ae972795SMatthew Ahrens int err; 856*ae972795SMatthew Ahrens 857*ae972795SMatthew Ahrens err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, FTAG, &zap); 858*ae972795SMatthew Ahrens if (err != 0) 859*ae972795SMatthew Ahrens return (err); 860*ae972795SMatthew Ahrens err = zap_lookup_impl(zap, name, integer_size, 861*ae972795SMatthew Ahrens num_integers, buf, mt, realname, rn_len, ncp); 862*ae972795SMatthew Ahrens zap_unlockdir(zap, FTAG); 863fa9e4066Sahrens return (err); 864fa9e4066Sahrens } 865fa9e4066Sahrens 866c7cd2421SGeorge Wilson int 867c7cd2421SGeorge Wilson zap_prefetch_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, 868c7cd2421SGeorge Wilson int key_numints) 869c7cd2421SGeorge Wilson { 870c7cd2421SGeorge Wilson zap_t *zap; 871c7cd2421SGeorge Wilson int err; 872c7cd2421SGeorge Wilson zap_name_t *zn; 873c7cd2421SGeorge Wilson 874*ae972795SMatthew Ahrens err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, FTAG, &zap); 875c7cd2421SGeorge Wilson if (err) 876c7cd2421SGeorge Wilson return (err); 877c7cd2421SGeorge Wilson zn = zap_name_alloc_uint64(zap, key, key_numints); 878c7cd2421SGeorge Wilson if (zn == NULL) { 879*ae972795SMatthew Ahrens zap_unlockdir(zap, FTAG); 880be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 881c7cd2421SGeorge Wilson } 882c7cd2421SGeorge Wilson 883c7cd2421SGeorge Wilson fzap_prefetch(zn); 884c7cd2421SGeorge Wilson zap_name_free(zn); 885*ae972795SMatthew Ahrens zap_unlockdir(zap, FTAG); 886c7cd2421SGeorge Wilson return (err); 887c7cd2421SGeorge Wilson } 888c7cd2421SGeorge Wilson 889b24ab676SJeff Bonwick int 890b24ab676SJeff Bonwick zap_lookup_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, 891b24ab676SJeff Bonwick int key_numints, uint64_t integer_size, uint64_t num_integers, void *buf) 892b24ab676SJeff Bonwick { 893b24ab676SJeff Bonwick zap_t *zap; 894b24ab676SJeff Bonwick int err; 895b24ab676SJeff Bonwick zap_name_t *zn; 896b24ab676SJeff Bonwick 897*ae972795SMatthew Ahrens err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, FTAG, &zap); 898b24ab676SJeff Bonwick if (err) 899b24ab676SJeff Bonwick return (err); 900b24ab676SJeff Bonwick zn = zap_name_alloc_uint64(zap, key, key_numints); 901b24ab676SJeff Bonwick if (zn == NULL) { 902*ae972795SMatthew Ahrens zap_unlockdir(zap, FTAG); 903be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 904b24ab676SJeff Bonwick } 905b24ab676SJeff Bonwick 906b24ab676SJeff Bonwick err = fzap_lookup(zn, integer_size, num_integers, buf, 907b24ab676SJeff Bonwick NULL, 0, NULL); 908b24ab676SJeff Bonwick zap_name_free(zn); 909*ae972795SMatthew Ahrens zap_unlockdir(zap, FTAG); 910b24ab676SJeff Bonwick return (err); 911b24ab676SJeff Bonwick } 912b24ab676SJeff Bonwick 91392241e0bSTom Erickson int 91492241e0bSTom Erickson zap_contains(objset_t *os, uint64_t zapobj, const char *name) 91592241e0bSTom Erickson { 9162acef22dSMatthew Ahrens int err = zap_lookup_norm(os, zapobj, name, 0, 9172acef22dSMatthew Ahrens 0, NULL, MT_EXACT, NULL, 0, NULL); 91892241e0bSTom Erickson if (err == EOVERFLOW || err == EINVAL) 91992241e0bSTom Erickson err = 0; /* found, but skipped reading the value */ 92092241e0bSTom Erickson return (err); 92192241e0bSTom Erickson } 92292241e0bSTom Erickson 923fa9e4066Sahrens int 924fa9e4066Sahrens zap_length(objset_t *os, uint64_t zapobj, const char *name, 925fa9e4066Sahrens uint64_t *integer_size, uint64_t *num_integers) 926fa9e4066Sahrens { 927fa9e4066Sahrens zap_t *zap; 928fa9e4066Sahrens int err; 929fa9e4066Sahrens mzap_ent_t *mze; 930da6c28aaSamw zap_name_t *zn; 931fa9e4066Sahrens 932*ae972795SMatthew Ahrens err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, FTAG, &zap); 933fa9e4066Sahrens if (err) 934fa9e4066Sahrens return (err); 935da6c28aaSamw zn = zap_name_alloc(zap, name, MT_EXACT); 936da6c28aaSamw if (zn == NULL) { 937*ae972795SMatthew Ahrens zap_unlockdir(zap, FTAG); 938be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 939da6c28aaSamw } 940fa9e4066Sahrens if (!zap->zap_ismicro) { 941da6c28aaSamw err = fzap_length(zn, integer_size, num_integers); 942fa9e4066Sahrens } else { 943da6c28aaSamw mze = mze_find(zn); 944fa9e4066Sahrens if (mze == NULL) { 945be6fd75aSMatthew Ahrens err = SET_ERROR(ENOENT); 946fa9e4066Sahrens } else { 947fa9e4066Sahrens if (integer_size) 948fa9e4066Sahrens *integer_size = 8; 949fa9e4066Sahrens if (num_integers) 950fa9e4066Sahrens *num_integers = 1; 951fa9e4066Sahrens } 952fa9e4066Sahrens } 953da6c28aaSamw zap_name_free(zn); 954*ae972795SMatthew Ahrens zap_unlockdir(zap, FTAG); 955fa9e4066Sahrens return (err); 956fa9e4066Sahrens } 957fa9e4066Sahrens 958b24ab676SJeff Bonwick int 959b24ab676SJeff Bonwick zap_length_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, 960b24ab676SJeff Bonwick int key_numints, uint64_t *integer_size, uint64_t *num_integers) 961b24ab676SJeff Bonwick { 962b24ab676SJeff Bonwick zap_t *zap; 963b24ab676SJeff Bonwick int err; 964b24ab676SJeff Bonwick zap_name_t *zn; 965b24ab676SJeff Bonwick 966*ae972795SMatthew Ahrens err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, FTAG, &zap); 967b24ab676SJeff Bonwick if (err) 968b24ab676SJeff Bonwick return (err); 969b24ab676SJeff Bonwick zn = zap_name_alloc_uint64(zap, key, key_numints); 970b24ab676SJeff Bonwick if (zn == NULL) { 971*ae972795SMatthew Ahrens zap_unlockdir(zap, FTAG); 972be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 973b24ab676SJeff Bonwick } 974b24ab676SJeff Bonwick err = fzap_length(zn, integer_size, num_integers); 975b24ab676SJeff Bonwick zap_name_free(zn); 976*ae972795SMatthew Ahrens zap_unlockdir(zap, FTAG); 977b24ab676SJeff Bonwick return (err); 978b24ab676SJeff Bonwick } 979b24ab676SJeff Bonwick 980fa9e4066Sahrens static void 981da6c28aaSamw mzap_addent(zap_name_t *zn, uint64_t value) 982fa9e4066Sahrens { 983fa9e4066Sahrens int i; 984da6c28aaSamw zap_t *zap = zn->zn_zap; 985fa9e4066Sahrens int start = zap->zap_m.zap_alloc_next; 986fa9e4066Sahrens uint32_t cd; 987fa9e4066Sahrens 988fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 989fa9e4066Sahrens 990fa9e4066Sahrens #ifdef ZFS_DEBUG 991fa9e4066Sahrens for (i = 0; i < zap->zap_m.zap_num_chunks; i++) { 992c1379625SJustin T. Gibbs mzap_ent_phys_t *mze = &zap_m_phys(zap)->mz_chunk[i]; 993b24ab676SJeff Bonwick ASSERT(strcmp(zn->zn_key_orig, mze->mze_name) != 0); 994fa9e4066Sahrens } 995fa9e4066Sahrens #endif 996fa9e4066Sahrens 997da6c28aaSamw cd = mze_find_unused_cd(zap, zn->zn_hash); 998fa9e4066Sahrens /* given the limited size of the microzap, this can't happen */ 999b24ab676SJeff Bonwick ASSERT(cd < zap_maxcd(zap)); 1000fa9e4066Sahrens 1001fa9e4066Sahrens again: 1002fa9e4066Sahrens for (i = start; i < zap->zap_m.zap_num_chunks; i++) { 1003c1379625SJustin T. Gibbs mzap_ent_phys_t *mze = &zap_m_phys(zap)->mz_chunk[i]; 1004fa9e4066Sahrens if (mze->mze_name[0] == 0) { 1005fa9e4066Sahrens mze->mze_value = value; 1006fa9e4066Sahrens mze->mze_cd = cd; 1007b24ab676SJeff Bonwick (void) strcpy(mze->mze_name, zn->zn_key_orig); 1008fa9e4066Sahrens zap->zap_m.zap_num_entries++; 1009fa9e4066Sahrens zap->zap_m.zap_alloc_next = i+1; 1010fa9e4066Sahrens if (zap->zap_m.zap_alloc_next == 1011fa9e4066Sahrens zap->zap_m.zap_num_chunks) 1012fa9e4066Sahrens zap->zap_m.zap_alloc_next = 0; 10133f9d6ad7SLin Ling mze_insert(zap, i, zn->zn_hash); 1014fa9e4066Sahrens return; 1015fa9e4066Sahrens } 1016fa9e4066Sahrens } 1017fa9e4066Sahrens if (start != 0) { 1018fa9e4066Sahrens start = 0; 1019fa9e4066Sahrens goto again; 1020fa9e4066Sahrens } 1021fa9e4066Sahrens ASSERT(!"out of entries!"); 1022fa9e4066Sahrens } 1023fa9e4066Sahrens 1024fa9e4066Sahrens int 1025b24ab676SJeff Bonwick zap_add(objset_t *os, uint64_t zapobj, const char *key, 1026fa9e4066Sahrens int integer_size, uint64_t num_integers, 1027fa9e4066Sahrens const void *val, dmu_tx_t *tx) 1028fa9e4066Sahrens { 1029fa9e4066Sahrens zap_t *zap; 1030fa9e4066Sahrens int err; 1031fa9e4066Sahrens mzap_ent_t *mze; 1032fa9e4066Sahrens const uint64_t *intval = val; 1033da6c28aaSamw zap_name_t *zn; 1034fa9e4066Sahrens 1035*ae972795SMatthew Ahrens err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, FTAG, &zap); 1036fa9e4066Sahrens if (err) 1037fa9e4066Sahrens return (err); 1038b24ab676SJeff Bonwick zn = zap_name_alloc(zap, key, MT_EXACT); 1039da6c28aaSamw if (zn == NULL) { 1040*ae972795SMatthew Ahrens zap_unlockdir(zap, FTAG); 1041be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 1042da6c28aaSamw } 1043fa9e4066Sahrens if (!zap->zap_ismicro) { 1044*ae972795SMatthew Ahrens err = fzap_add(zn, integer_size, num_integers, val, FTAG, tx); 1045ad860c82Sbonwick zap = zn->zn_zap; /* fzap_add() may change zap */ 1046fa9e4066Sahrens } else if (integer_size != 8 || num_integers != 1 || 1047b24ab676SJeff Bonwick strlen(key) >= MZAP_NAME_LEN) { 1048*ae972795SMatthew Ahrens err = mzap_upgrade(&zn->zn_zap, FTAG, tx, 0); 1049*ae972795SMatthew Ahrens if (err == 0) { 1050*ae972795SMatthew Ahrens err = fzap_add(zn, integer_size, num_integers, val, 1051*ae972795SMatthew Ahrens FTAG, tx); 1052*ae972795SMatthew Ahrens } 1053ad860c82Sbonwick zap = zn->zn_zap; /* fzap_add() may change zap */ 1054fa9e4066Sahrens } else { 1055da6c28aaSamw mze = mze_find(zn); 1056fa9e4066Sahrens if (mze != NULL) { 1057be6fd75aSMatthew Ahrens err = SET_ERROR(EEXIST); 1058fa9e4066Sahrens } else { 1059da6c28aaSamw mzap_addent(zn, *intval); 1060fa9e4066Sahrens } 1061fa9e4066Sahrens } 1062ad860c82Sbonwick ASSERT(zap == zn->zn_zap); 1063da6c28aaSamw zap_name_free(zn); 1064ad860c82Sbonwick if (zap != NULL) /* may be NULL if fzap_add() failed */ 1065*ae972795SMatthew Ahrens zap_unlockdir(zap, FTAG); 1066fa9e4066Sahrens return (err); 1067fa9e4066Sahrens } 1068fa9e4066Sahrens 1069b24ab676SJeff Bonwick int 1070b24ab676SJeff Bonwick zap_add_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, 1071b24ab676SJeff Bonwick int key_numints, int integer_size, uint64_t num_integers, 1072b24ab676SJeff Bonwick const void *val, dmu_tx_t *tx) 1073b24ab676SJeff Bonwick { 1074b24ab676SJeff Bonwick zap_t *zap; 1075b24ab676SJeff Bonwick int err; 1076b24ab676SJeff Bonwick zap_name_t *zn; 1077b24ab676SJeff Bonwick 1078*ae972795SMatthew Ahrens err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, FTAG, &zap); 1079b24ab676SJeff Bonwick if (err) 1080b24ab676SJeff Bonwick return (err); 1081b24ab676SJeff Bonwick zn = zap_name_alloc_uint64(zap, key, key_numints); 1082b24ab676SJeff Bonwick if (zn == NULL) { 1083*ae972795SMatthew Ahrens zap_unlockdir(zap, FTAG); 1084be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 1085b24ab676SJeff Bonwick } 1086*ae972795SMatthew Ahrens err = fzap_add(zn, integer_size, num_integers, val, FTAG, tx); 1087b24ab676SJeff Bonwick zap = zn->zn_zap; /* fzap_add() may change zap */ 1088b24ab676SJeff Bonwick zap_name_free(zn); 1089b24ab676SJeff Bonwick if (zap != NULL) /* may be NULL if fzap_add() failed */ 1090*ae972795SMatthew Ahrens zap_unlockdir(zap, FTAG); 1091b24ab676SJeff Bonwick return (err); 1092b24ab676SJeff Bonwick } 1093b24ab676SJeff Bonwick 1094fa9e4066Sahrens int 1095fa9e4066Sahrens zap_update(objset_t *os, uint64_t zapobj, const char *name, 1096fa9e4066Sahrens int integer_size, uint64_t num_integers, const void *val, dmu_tx_t *tx) 1097fa9e4066Sahrens { 1098fa9e4066Sahrens zap_t *zap; 1099fa9e4066Sahrens mzap_ent_t *mze; 11003f9d6ad7SLin Ling uint64_t oldval; 1101fa9e4066Sahrens const uint64_t *intval = val; 1102da6c28aaSamw zap_name_t *zn; 1103fa9e4066Sahrens int err; 1104fa9e4066Sahrens 11053f9d6ad7SLin Ling #ifdef ZFS_DEBUG 11063f9d6ad7SLin Ling /* 11073f9d6ad7SLin Ling * If there is an old value, it shouldn't change across the 11083f9d6ad7SLin Ling * lockdir (eg, due to bprewrite's xlation). 11093f9d6ad7SLin Ling */ 11103f9d6ad7SLin Ling if (integer_size == 8 && num_integers == 1) 11113f9d6ad7SLin Ling (void) zap_lookup(os, zapobj, name, 8, 1, &oldval); 11123f9d6ad7SLin Ling #endif 11133f9d6ad7SLin Ling 1114*ae972795SMatthew Ahrens err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, FTAG, &zap); 1115fa9e4066Sahrens if (err) 1116fa9e4066Sahrens return (err); 1117da6c28aaSamw zn = zap_name_alloc(zap, name, MT_EXACT); 1118da6c28aaSamw if (zn == NULL) { 1119*ae972795SMatthew Ahrens zap_unlockdir(zap, FTAG); 1120be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 1121da6c28aaSamw } 1122fa9e4066Sahrens if (!zap->zap_ismicro) { 1123*ae972795SMatthew Ahrens err = fzap_update(zn, integer_size, num_integers, val, 1124*ae972795SMatthew Ahrens FTAG, tx); 1125ad860c82Sbonwick zap = zn->zn_zap; /* fzap_update() may change zap */ 1126fa9e4066Sahrens } else if (integer_size != 8 || num_integers != 1 || 1127fa9e4066Sahrens strlen(name) >= MZAP_NAME_LEN) { 1128fa9e4066Sahrens dprintf("upgrading obj %llu: intsz=%u numint=%llu name=%s\n", 1129fa9e4066Sahrens zapobj, integer_size, num_integers, name); 1130*ae972795SMatthew Ahrens err = mzap_upgrade(&zn->zn_zap, FTAG, tx, 0); 1131*ae972795SMatthew Ahrens if (err == 0) { 1132ad860c82Sbonwick err = fzap_update(zn, integer_size, num_integers, 1133*ae972795SMatthew Ahrens val, FTAG, tx); 1134*ae972795SMatthew Ahrens } 1135ad860c82Sbonwick zap = zn->zn_zap; /* fzap_update() may change zap */ 1136fa9e4066Sahrens } else { 1137da6c28aaSamw mze = mze_find(zn); 1138fa9e4066Sahrens if (mze != NULL) { 11393f9d6ad7SLin Ling ASSERT3U(MZE_PHYS(zap, mze)->mze_value, ==, oldval); 11403f9d6ad7SLin Ling MZE_PHYS(zap, mze)->mze_value = *intval; 1141fa9e4066Sahrens } else { 1142da6c28aaSamw mzap_addent(zn, *intval); 1143fa9e4066Sahrens } 1144fa9e4066Sahrens } 1145ad860c82Sbonwick ASSERT(zap == zn->zn_zap); 1146da6c28aaSamw zap_name_free(zn); 1147ad860c82Sbonwick if (zap != NULL) /* may be NULL if fzap_upgrade() failed */ 1148*ae972795SMatthew Ahrens zap_unlockdir(zap, FTAG); 1149455d5089Sahrens return (err); 1150fa9e4066Sahrens } 1151fa9e4066Sahrens 1152b24ab676SJeff Bonwick int 1153b24ab676SJeff Bonwick zap_update_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, 1154b24ab676SJeff Bonwick int key_numints, 1155b24ab676SJeff Bonwick int integer_size, uint64_t num_integers, const void *val, dmu_tx_t *tx) 1156b24ab676SJeff Bonwick { 1157b24ab676SJeff Bonwick zap_t *zap; 1158b24ab676SJeff Bonwick zap_name_t *zn; 1159b24ab676SJeff Bonwick int err; 1160b24ab676SJeff Bonwick 1161*ae972795SMatthew Ahrens err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, FTAG, &zap); 1162b24ab676SJeff Bonwick if (err) 1163b24ab676SJeff Bonwick return (err); 1164b24ab676SJeff Bonwick zn = zap_name_alloc_uint64(zap, key, key_numints); 1165b24ab676SJeff Bonwick if (zn == NULL) { 1166*ae972795SMatthew Ahrens zap_unlockdir(zap, FTAG); 1167be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 1168b24ab676SJeff Bonwick } 1169*ae972795SMatthew Ahrens err = fzap_update(zn, integer_size, num_integers, val, FTAG, tx); 1170b24ab676SJeff Bonwick zap = zn->zn_zap; /* fzap_update() may change zap */ 1171b24ab676SJeff Bonwick zap_name_free(zn); 1172b24ab676SJeff Bonwick if (zap != NULL) /* may be NULL if fzap_upgrade() failed */ 1173*ae972795SMatthew Ahrens zap_unlockdir(zap, FTAG); 1174b24ab676SJeff Bonwick return (err); 1175b24ab676SJeff Bonwick } 1176b24ab676SJeff Bonwick 1177fa9e4066Sahrens int 1178fa9e4066Sahrens zap_remove(objset_t *os, uint64_t zapobj, const char *name, dmu_tx_t *tx) 1179da6c28aaSamw { 1180da6c28aaSamw return (zap_remove_norm(os, zapobj, name, MT_EXACT, tx)); 1181da6c28aaSamw } 1182da6c28aaSamw 1183da6c28aaSamw int 1184da6c28aaSamw zap_remove_norm(objset_t *os, uint64_t zapobj, const char *name, 1185da6c28aaSamw matchtype_t mt, dmu_tx_t *tx) 1186fa9e4066Sahrens { 1187fa9e4066Sahrens zap_t *zap; 1188fa9e4066Sahrens int err; 1189fa9e4066Sahrens mzap_ent_t *mze; 1190da6c28aaSamw zap_name_t *zn; 1191fa9e4066Sahrens 1192*ae972795SMatthew Ahrens err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, FALSE, FTAG, &zap); 1193fa9e4066Sahrens if (err) 1194fa9e4066Sahrens return (err); 1195da6c28aaSamw zn = zap_name_alloc(zap, name, mt); 1196da6c28aaSamw if (zn == NULL) { 1197*ae972795SMatthew Ahrens zap_unlockdir(zap, FTAG); 1198be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 1199da6c28aaSamw } 1200fa9e4066Sahrens if (!zap->zap_ismicro) { 1201da6c28aaSamw err = fzap_remove(zn, tx); 1202fa9e4066Sahrens } else { 1203da6c28aaSamw mze = mze_find(zn); 1204fa9e4066Sahrens if (mze == NULL) { 1205be6fd75aSMatthew Ahrens err = SET_ERROR(ENOENT); 1206fa9e4066Sahrens } else { 1207fa9e4066Sahrens zap->zap_m.zap_num_entries--; 1208c1379625SJustin T. Gibbs bzero(&zap_m_phys(zap)->mz_chunk[mze->mze_chunkid], 1209fa9e4066Sahrens sizeof (mzap_ent_phys_t)); 1210fa9e4066Sahrens mze_remove(zap, mze); 1211fa9e4066Sahrens } 1212fa9e4066Sahrens } 1213da6c28aaSamw zap_name_free(zn); 1214*ae972795SMatthew Ahrens zap_unlockdir(zap, FTAG); 1215fa9e4066Sahrens return (err); 1216fa9e4066Sahrens } 1217fa9e4066Sahrens 1218b24ab676SJeff Bonwick int 1219b24ab676SJeff Bonwick zap_remove_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, 1220b24ab676SJeff Bonwick int key_numints, dmu_tx_t *tx) 1221b24ab676SJeff Bonwick { 1222b24ab676SJeff Bonwick zap_t *zap; 1223b24ab676SJeff Bonwick int err; 1224b24ab676SJeff Bonwick zap_name_t *zn; 1225b24ab676SJeff Bonwick 1226*ae972795SMatthew Ahrens err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, FALSE, FTAG, &zap); 1227b24ab676SJeff Bonwick if (err) 1228b24ab676SJeff Bonwick return (err); 1229b24ab676SJeff Bonwick zn = zap_name_alloc_uint64(zap, key, key_numints); 1230b24ab676SJeff Bonwick if (zn == NULL) { 1231*ae972795SMatthew Ahrens zap_unlockdir(zap, FTAG); 1232be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 1233b24ab676SJeff Bonwick } 1234b24ab676SJeff Bonwick err = fzap_remove(zn, tx); 1235b24ab676SJeff Bonwick zap_name_free(zn); 1236*ae972795SMatthew Ahrens zap_unlockdir(zap, FTAG); 1237b24ab676SJeff Bonwick return (err); 1238b24ab676SJeff Bonwick } 1239b24ab676SJeff Bonwick 1240fa9e4066Sahrens /* 1241fa9e4066Sahrens * Routines for iterating over the attributes. 1242fa9e4066Sahrens */ 1243fa9e4066Sahrens 1244fa9e4066Sahrens void 1245fa9e4066Sahrens zap_cursor_init_serialized(zap_cursor_t *zc, objset_t *os, uint64_t zapobj, 1246fa9e4066Sahrens uint64_t serialized) 1247fa9e4066Sahrens { 1248fa9e4066Sahrens zc->zc_objset = os; 124987e5029aSahrens zc->zc_zap = NULL; 125087e5029aSahrens zc->zc_leaf = NULL; 1251fa9e4066Sahrens zc->zc_zapobj = zapobj; 1252b24ab676SJeff Bonwick zc->zc_serialized = serialized; 1253b24ab676SJeff Bonwick zc->zc_hash = 0; 1254b24ab676SJeff Bonwick zc->zc_cd = 0; 1255fa9e4066Sahrens } 1256fa9e4066Sahrens 125787e5029aSahrens void 125887e5029aSahrens zap_cursor_init(zap_cursor_t *zc, objset_t *os, uint64_t zapobj) 125987e5029aSahrens { 126087e5029aSahrens zap_cursor_init_serialized(zc, os, zapobj, 0); 126187e5029aSahrens } 126287e5029aSahrens 126387e5029aSahrens void 126487e5029aSahrens zap_cursor_fini(zap_cursor_t *zc) 126587e5029aSahrens { 126687e5029aSahrens if (zc->zc_zap) { 126787e5029aSahrens rw_enter(&zc->zc_zap->zap_rwlock, RW_READER); 1268*ae972795SMatthew Ahrens zap_unlockdir(zc->zc_zap, NULL); 126987e5029aSahrens zc->zc_zap = NULL; 127087e5029aSahrens } 127187e5029aSahrens if (zc->zc_leaf) { 127287e5029aSahrens rw_enter(&zc->zc_leaf->l_rwlock, RW_READER); 127387e5029aSahrens zap_put_leaf(zc->zc_leaf); 127487e5029aSahrens zc->zc_leaf = NULL; 127587e5029aSahrens } 127687e5029aSahrens zc->zc_objset = NULL; 127787e5029aSahrens } 127887e5029aSahrens 1279fa9e4066Sahrens uint64_t 1280fa9e4066Sahrens zap_cursor_serialize(zap_cursor_t *zc) 1281fa9e4066Sahrens { 1282fa9e4066Sahrens if (zc->zc_hash == -1ULL) 1283fa9e4066Sahrens return (-1ULL); 1284b24ab676SJeff Bonwick if (zc->zc_zap == NULL) 1285b24ab676SJeff Bonwick return (zc->zc_serialized); 1286b24ab676SJeff Bonwick ASSERT((zc->zc_hash & zap_maxcd(zc->zc_zap)) == 0); 1287b24ab676SJeff Bonwick ASSERT(zc->zc_cd < zap_maxcd(zc->zc_zap)); 1288b24ab676SJeff Bonwick 1289b24ab676SJeff Bonwick /* 1290b24ab676SJeff Bonwick * We want to keep the high 32 bits of the cursor zero if we can, so 1291b24ab676SJeff Bonwick * that 32-bit programs can access this. So usually use a small 1292b24ab676SJeff Bonwick * (28-bit) hash value so we can fit 4 bits of cd into the low 32-bits 1293b24ab676SJeff Bonwick * of the cursor. 1294b24ab676SJeff Bonwick * 1295b24ab676SJeff Bonwick * [ collision differentiator | zap_hashbits()-bit hash value ] 1296b24ab676SJeff Bonwick */ 1297b24ab676SJeff Bonwick return ((zc->zc_hash >> (64 - zap_hashbits(zc->zc_zap))) | 1298b24ab676SJeff Bonwick ((uint64_t)zc->zc_cd << zap_hashbits(zc->zc_zap))); 1299fa9e4066Sahrens } 1300fa9e4066Sahrens 1301fa9e4066Sahrens int 1302fa9e4066Sahrens zap_cursor_retrieve(zap_cursor_t *zc, zap_attribute_t *za) 1303fa9e4066Sahrens { 1304fa9e4066Sahrens int err; 1305fa9e4066Sahrens avl_index_t idx; 1306fa9e4066Sahrens mzap_ent_t mze_tofind; 1307fa9e4066Sahrens mzap_ent_t *mze; 1308fa9e4066Sahrens 1309fa9e4066Sahrens if (zc->zc_hash == -1ULL) 1310be6fd75aSMatthew Ahrens return (SET_ERROR(ENOENT)); 1311fa9e4066Sahrens 131287e5029aSahrens if (zc->zc_zap == NULL) { 1313b24ab676SJeff Bonwick int hb; 131487e5029aSahrens err = zap_lockdir(zc->zc_objset, zc->zc_zapobj, NULL, 1315*ae972795SMatthew Ahrens RW_READER, TRUE, FALSE, NULL, &zc->zc_zap); 131687e5029aSahrens if (err) 131787e5029aSahrens return (err); 1318b24ab676SJeff Bonwick 1319b24ab676SJeff Bonwick /* 1320b24ab676SJeff Bonwick * To support zap_cursor_init_serialized, advance, retrieve, 1321b24ab676SJeff Bonwick * we must add to the existing zc_cd, which may already 1322b24ab676SJeff Bonwick * be 1 due to the zap_cursor_advance. 1323b24ab676SJeff Bonwick */ 1324b24ab676SJeff Bonwick ASSERT(zc->zc_hash == 0); 1325b24ab676SJeff Bonwick hb = zap_hashbits(zc->zc_zap); 1326b24ab676SJeff Bonwick zc->zc_hash = zc->zc_serialized << (64 - hb); 1327b24ab676SJeff Bonwick zc->zc_cd += zc->zc_serialized >> hb; 1328b24ab676SJeff Bonwick if (zc->zc_cd >= zap_maxcd(zc->zc_zap)) /* corrupt serialized */ 1329b24ab676SJeff Bonwick zc->zc_cd = 0; 133087e5029aSahrens } else { 133187e5029aSahrens rw_enter(&zc->zc_zap->zap_rwlock, RW_READER); 133287e5029aSahrens } 133387e5029aSahrens if (!zc->zc_zap->zap_ismicro) { 133487e5029aSahrens err = fzap_cursor_retrieve(zc->zc_zap, zc, za); 1335fa9e4066Sahrens } else { 1336fa9e4066Sahrens mze_tofind.mze_hash = zc->zc_hash; 13373f9d6ad7SLin Ling mze_tofind.mze_cd = zc->zc_cd; 1338fa9e4066Sahrens 133987e5029aSahrens mze = avl_find(&zc->zc_zap->zap_m.zap_avl, &mze_tofind, &idx); 134087e5029aSahrens if (mze == NULL) { 134187e5029aSahrens mze = avl_nearest(&zc->zc_zap->zap_m.zap_avl, 134287e5029aSahrens idx, AVL_AFTER); 134387e5029aSahrens } 1344fa9e4066Sahrens if (mze) { 13453f9d6ad7SLin Ling mzap_ent_phys_t *mzep = MZE_PHYS(zc->zc_zap, mze); 13463f9d6ad7SLin Ling ASSERT3U(mze->mze_cd, ==, mzep->mze_cd); 1347da6c28aaSamw za->za_normalization_conflict = 1348da6c28aaSamw mzap_normalization_conflict(zc->zc_zap, NULL, mze); 1349fa9e4066Sahrens za->za_integer_length = 8; 1350fa9e4066Sahrens za->za_num_integers = 1; 13513f9d6ad7SLin Ling za->za_first_integer = mzep->mze_value; 13523f9d6ad7SLin Ling (void) strcpy(za->za_name, mzep->mze_name); 1353fa9e4066Sahrens zc->zc_hash = mze->mze_hash; 13543f9d6ad7SLin Ling zc->zc_cd = mze->mze_cd; 1355fa9e4066Sahrens err = 0; 1356fa9e4066Sahrens } else { 1357fa9e4066Sahrens zc->zc_hash = -1ULL; 1358be6fd75aSMatthew Ahrens err = SET_ERROR(ENOENT); 1359fa9e4066Sahrens } 1360fa9e4066Sahrens } 136187e5029aSahrens rw_exit(&zc->zc_zap->zap_rwlock); 1362fa9e4066Sahrens return (err); 1363fa9e4066Sahrens } 1364fa9e4066Sahrens 1365fa9e4066Sahrens void 1366fa9e4066Sahrens zap_cursor_advance(zap_cursor_t *zc) 1367fa9e4066Sahrens { 1368fa9e4066Sahrens if (zc->zc_hash == -1ULL) 1369fa9e4066Sahrens return; 1370fa9e4066Sahrens zc->zc_cd++; 1371fa9e4066Sahrens } 1372fa9e4066Sahrens 1373fa9e4066Sahrens int 1374fa9e4066Sahrens zap_get_stats(objset_t *os, uint64_t zapobj, zap_stats_t *zs) 1375fa9e4066Sahrens { 1376fa9e4066Sahrens int err; 1377fa9e4066Sahrens zap_t *zap; 1378fa9e4066Sahrens 1379*ae972795SMatthew Ahrens err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, FTAG, &zap); 1380fa9e4066Sahrens if (err) 1381fa9e4066Sahrens return (err); 1382fa9e4066Sahrens 1383fa9e4066Sahrens bzero(zs, sizeof (zap_stats_t)); 1384fa9e4066Sahrens 1385fa9e4066Sahrens if (zap->zap_ismicro) { 1386fa9e4066Sahrens zs->zs_blocksize = zap->zap_dbuf->db_size; 1387fa9e4066Sahrens zs->zs_num_entries = zap->zap_m.zap_num_entries; 1388fa9e4066Sahrens zs->zs_num_blocks = 1; 1389fa9e4066Sahrens } else { 1390fa9e4066Sahrens fzap_get_stats(zap, zs); 1391fa9e4066Sahrens } 1392*ae972795SMatthew Ahrens zap_unlockdir(zap, FTAG); 1393fa9e4066Sahrens return (0); 1394fa9e4066Sahrens } 13953d692628SSanjeev Bagewadi 13963d692628SSanjeev Bagewadi int 13973d692628SSanjeev Bagewadi zap_count_write(objset_t *os, uint64_t zapobj, const char *name, int add, 13980c779ad4SMatthew Ahrens refcount_t *towrite, refcount_t *tooverwrite) 13993d692628SSanjeev Bagewadi { 14003d692628SSanjeev Bagewadi zap_t *zap; 14013d692628SSanjeev Bagewadi int err = 0; 14023d692628SSanjeev Bagewadi 14033d692628SSanjeev Bagewadi /* 14043d692628SSanjeev Bagewadi * Since, we don't have a name, we cannot figure out which blocks will 14053d692628SSanjeev Bagewadi * be affected in this operation. So, account for the worst case : 14063d692628SSanjeev Bagewadi * - 3 blocks overwritten: target leaf, ptrtbl block, header block 14073d692628SSanjeev Bagewadi * - 4 new blocks written if adding: 14080c779ad4SMatthew Ahrens * - 2 blocks for possibly split leaves, 14090c779ad4SMatthew Ahrens * - 2 grown ptrtbl blocks 14103d692628SSanjeev Bagewadi * 1411*ae972795SMatthew Ahrens * This also accommodates the case where an add operation to a fairly 14123d692628SSanjeev Bagewadi * large microzap results in a promotion to fatzap. 14133d692628SSanjeev Bagewadi */ 14143d692628SSanjeev Bagewadi if (name == NULL) { 14150c779ad4SMatthew Ahrens (void) refcount_add_many(towrite, 14160c779ad4SMatthew Ahrens (3 + (add ? 4 : 0)) * SPA_OLD_MAXBLOCKSIZE, FTAG); 14173d692628SSanjeev Bagewadi return (err); 14183d692628SSanjeev Bagewadi } 14193d692628SSanjeev Bagewadi 14203d692628SSanjeev Bagewadi /* 142119b94df9SMatthew Ahrens * We lock the zap with adding == FALSE. Because, if we pass 14223d692628SSanjeev Bagewadi * the actual value of add, it could trigger a mzap_upgrade(). 14233d692628SSanjeev Bagewadi * At present we are just evaluating the possibility of this operation 1424*ae972795SMatthew Ahrens * and hence we do not want to trigger an upgrade. 14253d692628SSanjeev Bagewadi */ 1426*ae972795SMatthew Ahrens err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, 1427*ae972795SMatthew Ahrens FTAG, &zap); 1428*ae972795SMatthew Ahrens if (err != 0) 14293d692628SSanjeev Bagewadi return (err); 14303d692628SSanjeev Bagewadi 14313d692628SSanjeev Bagewadi if (!zap->zap_ismicro) { 14323d692628SSanjeev Bagewadi zap_name_t *zn = zap_name_alloc(zap, name, MT_EXACT); 14333d692628SSanjeev Bagewadi if (zn) { 14343d692628SSanjeev Bagewadi err = fzap_count_write(zn, add, towrite, 14353d692628SSanjeev Bagewadi tooverwrite); 14363d692628SSanjeev Bagewadi zap_name_free(zn); 14373d692628SSanjeev Bagewadi } else { 14383d692628SSanjeev Bagewadi /* 14393d692628SSanjeev Bagewadi * We treat this case as similar to (name == NULL) 14403d692628SSanjeev Bagewadi */ 14410c779ad4SMatthew Ahrens (void) refcount_add_many(towrite, 14420c779ad4SMatthew Ahrens (3 + (add ? 4 : 0)) * SPA_OLD_MAXBLOCKSIZE, FTAG); 14433d692628SSanjeev Bagewadi } 14443d692628SSanjeev Bagewadi } else { 1445720d1aa1SSanjeev Bagewadi /* 1446720d1aa1SSanjeev Bagewadi * We are here if (name != NULL) and this is a micro-zap. 1447720d1aa1SSanjeev Bagewadi * We account for the header block depending on whether it 1448720d1aa1SSanjeev Bagewadi * is freeable. 1449720d1aa1SSanjeev Bagewadi * 1450720d1aa1SSanjeev Bagewadi * Incase of an add-operation it is hard to find out 1451720d1aa1SSanjeev Bagewadi * if this add will promote this microzap to fatzap. 1452720d1aa1SSanjeev Bagewadi * Hence, we consider the worst case and account for the 1453720d1aa1SSanjeev Bagewadi * blocks assuming this microzap would be promoted to a 1454720d1aa1SSanjeev Bagewadi * fatzap. 1455720d1aa1SSanjeev Bagewadi * 1456720d1aa1SSanjeev Bagewadi * 1 block overwritten : header block 1457720d1aa1SSanjeev Bagewadi * 4 new blocks written : 2 new split leaf, 2 grown 1458720d1aa1SSanjeev Bagewadi * ptrtbl blocks 1459720d1aa1SSanjeev Bagewadi */ 14600c779ad4SMatthew Ahrens if (dmu_buf_freeable(zap->zap_dbuf)) { 14610c779ad4SMatthew Ahrens (void) refcount_add_many(tooverwrite, 14620c779ad4SMatthew Ahrens MZAP_MAX_BLKSZ, FTAG); 14630c779ad4SMatthew Ahrens } else { 14640c779ad4SMatthew Ahrens (void) refcount_add_many(towrite, 14650c779ad4SMatthew Ahrens MZAP_MAX_BLKSZ, FTAG); 14660c779ad4SMatthew Ahrens } 1467720d1aa1SSanjeev Bagewadi 1468720d1aa1SSanjeev Bagewadi if (add) { 14690c779ad4SMatthew Ahrens (void) refcount_add_many(towrite, 14700c779ad4SMatthew Ahrens 4 * MZAP_MAX_BLKSZ, FTAG); 14713d692628SSanjeev Bagewadi } 14723d692628SSanjeev Bagewadi } 14733d692628SSanjeev Bagewadi 1474*ae972795SMatthew Ahrens zap_unlockdir(zap, FTAG); 14753d692628SSanjeev Bagewadi return (err); 14763d692628SSanjeev Bagewadi } 1477