1fa9e4066Sahrens /* 2fa9e4066Sahrens * CDDL HEADER START 3fa9e4066Sahrens * 4fa9e4066Sahrens * The contents of this file are subject to the terms of the 5f65e61c0Sahrens * Common Development and Distribution License (the "License"). 6f65e61c0Sahrens * You may not use this file except in compliance with the License. 7fa9e4066Sahrens * 8fa9e4066Sahrens * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9fa9e4066Sahrens * or http://www.opensolaris.org/os/licensing. 10fa9e4066Sahrens * See the License for the specific language governing permissions 11fa9e4066Sahrens * and limitations under the License. 12fa9e4066Sahrens * 13fa9e4066Sahrens * When distributing Covered Code, include this CDDL HEADER in each 14fa9e4066Sahrens * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15fa9e4066Sahrens * If applicable, add the following below this CDDL HEADER, with the 16fa9e4066Sahrens * fields enclosed by brackets "[]" replaced with your own identifying 17fa9e4066Sahrens * information: Portions Copyright [yyyy] [name of copyright owner] 18fa9e4066Sahrens * 19fa9e4066Sahrens * CDDL HEADER END 20fa9e4066Sahrens */ 21fa9e4066Sahrens /* 2247cb52daSJeff Bonwick * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 23bf16b11eSMatthew Ahrens * Copyright (c) 2011, 2014 by Delphix. All rights reserved. 24bc9014e6SJustin Gibbs * Copyright (c) 2014 Spectra Logic Corporation, All rights reserved. 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 46b24ab676SJeff Bonwick static int mzap_upgrade(zap_t **zapp, dmu_tx_t *tx, zap_flags_t flags); 47fa9e4066Sahrens 48b24ab676SJeff Bonwick uint64_t 49b24ab676SJeff Bonwick zap_getflags(zap_t *zap) 50b24ab676SJeff Bonwick { 51b24ab676SJeff Bonwick if (zap->zap_ismicro) 52b24ab676SJeff Bonwick return (0); 53c1379625SJustin T. Gibbs return (zap_f_phys(zap)->zap_flags); 54b24ab676SJeff Bonwick } 55b24ab676SJeff Bonwick 56b24ab676SJeff Bonwick int 57b24ab676SJeff Bonwick zap_hashbits(zap_t *zap) 58b24ab676SJeff Bonwick { 59b24ab676SJeff Bonwick if (zap_getflags(zap) & ZAP_FLAG_HASH64) 60b24ab676SJeff Bonwick return (48); 61b24ab676SJeff Bonwick else 62b24ab676SJeff Bonwick return (28); 63b24ab676SJeff Bonwick } 64b24ab676SJeff Bonwick 65b24ab676SJeff Bonwick uint32_t 66b24ab676SJeff Bonwick zap_maxcd(zap_t *zap) 67b24ab676SJeff Bonwick { 68b24ab676SJeff Bonwick if (zap_getflags(zap) & ZAP_FLAG_HASH64) 69b24ab676SJeff Bonwick return ((1<<16)-1); 70b24ab676SJeff Bonwick else 71b24ab676SJeff Bonwick return (-1U); 72b24ab676SJeff Bonwick } 73fa9e4066Sahrens 74da6c28aaSamw static uint64_t 75b24ab676SJeff Bonwick zap_hash(zap_name_t *zn) 76da6c28aaSamw { 77b24ab676SJeff Bonwick zap_t *zap = zn->zn_zap; 78b24ab676SJeff Bonwick uint64_t h = 0; 79da6c28aaSamw 80b24ab676SJeff Bonwick if (zap_getflags(zap) & ZAP_FLAG_PRE_HASHED_KEY) { 81b24ab676SJeff Bonwick ASSERT(zap_getflags(zap) & ZAP_FLAG_UINT64_KEY); 82b24ab676SJeff Bonwick h = *(uint64_t *)zn->zn_key_orig; 83b24ab676SJeff Bonwick } else { 84b24ab676SJeff Bonwick h = zap->zap_salt; 85b24ab676SJeff Bonwick ASSERT(h != 0); 86b24ab676SJeff Bonwick ASSERT(zfs_crc64_table[128] == ZFS_CRC64_POLY); 87b24ab676SJeff Bonwick 88486ae710SMatthew Ahrens if (zap_getflags(zap) & ZAP_FLAG_UINT64_KEY) { 89486ae710SMatthew Ahrens int i; 90486ae710SMatthew Ahrens const uint64_t *wp = zn->zn_key_norm; 91486ae710SMatthew Ahrens 92486ae710SMatthew Ahrens ASSERT(zn->zn_key_intlen == 8); 93486ae710SMatthew Ahrens for (i = 0; i < zn->zn_key_norm_numints; wp++, i++) { 94486ae710SMatthew Ahrens int j; 95486ae710SMatthew Ahrens uint64_t word = *wp; 96486ae710SMatthew Ahrens 97486ae710SMatthew Ahrens for (j = 0; j < zn->zn_key_intlen; j++) { 98486ae710SMatthew Ahrens h = (h >> 8) ^ 99486ae710SMatthew Ahrens zfs_crc64_table[(h ^ word) & 0xFF]; 100486ae710SMatthew Ahrens word >>= NBBY; 101486ae710SMatthew Ahrens } 102486ae710SMatthew Ahrens } 103486ae710SMatthew Ahrens } else { 104486ae710SMatthew Ahrens int i, len; 105486ae710SMatthew Ahrens const uint8_t *cp = zn->zn_key_norm; 106486ae710SMatthew Ahrens 107486ae710SMatthew Ahrens /* 108486ae710SMatthew Ahrens * We previously stored the terminating null on 109486ae710SMatthew Ahrens * disk, but didn't hash it, so we need to 110486ae710SMatthew Ahrens * continue to not hash it. (The 111486ae710SMatthew Ahrens * zn_key_*_numints includes the terminating 112486ae710SMatthew Ahrens * null for non-binary keys.) 113486ae710SMatthew Ahrens */ 114486ae710SMatthew Ahrens len = zn->zn_key_norm_numints - 1; 115486ae710SMatthew Ahrens 116486ae710SMatthew Ahrens ASSERT(zn->zn_key_intlen == 1); 117486ae710SMatthew Ahrens for (i = 0; i < len; cp++, i++) { 118486ae710SMatthew Ahrens h = (h >> 8) ^ 119486ae710SMatthew Ahrens zfs_crc64_table[(h ^ *cp) & 0xFF]; 120486ae710SMatthew Ahrens } 121486ae710SMatthew Ahrens } 122b24ab676SJeff Bonwick } 123da6c28aaSamw /* 124b24ab676SJeff Bonwick * Don't use all 64 bits, since we need some in the cookie for 125b24ab676SJeff Bonwick * the collision differentiator. We MUST use the high bits, 126b24ab676SJeff Bonwick * since those are the ones that we first pay attention to when 127da6c28aaSamw * chosing the bucket. 128da6c28aaSamw */ 129b24ab676SJeff Bonwick h &= ~((1ULL << (64 - zap_hashbits(zap))) - 1); 130da6c28aaSamw 131b24ab676SJeff Bonwick return (h); 132da6c28aaSamw } 133da6c28aaSamw 134da6c28aaSamw static int 135da6c28aaSamw zap_normalize(zap_t *zap, const char *name, char *namenorm) 136da6c28aaSamw { 137da6c28aaSamw size_t inlen, outlen; 138da6c28aaSamw int err; 139da6c28aaSamw 140b24ab676SJeff Bonwick ASSERT(!(zap_getflags(zap) & ZAP_FLAG_UINT64_KEY)); 141b24ab676SJeff Bonwick 142da6c28aaSamw inlen = strlen(name) + 1; 143da6c28aaSamw outlen = ZAP_MAXNAMELEN; 144da6c28aaSamw 145da6c28aaSamw err = 0; 146da6c28aaSamw (void) u8_textprep_str((char *)name, &inlen, namenorm, &outlen, 147d05ba1e6STim Haley zap->zap_normflags | U8_TEXTPREP_IGNORE_NULL | 148d05ba1e6STim Haley U8_TEXTPREP_IGNORE_INVALID, U8_UNICODE_LATEST, &err); 149da6c28aaSamw 150da6c28aaSamw return (err); 151da6c28aaSamw } 152da6c28aaSamw 153da6c28aaSamw boolean_t 154da6c28aaSamw zap_match(zap_name_t *zn, const char *matchname) 155da6c28aaSamw { 156b24ab676SJeff Bonwick ASSERT(!(zap_getflags(zn->zn_zap) & ZAP_FLAG_UINT64_KEY)); 157b24ab676SJeff Bonwick 158da6c28aaSamw if (zn->zn_matchtype == MT_FIRST) { 159da6c28aaSamw char norm[ZAP_MAXNAMELEN]; 160da6c28aaSamw 161da6c28aaSamw if (zap_normalize(zn->zn_zap, matchname, norm) != 0) 162da6c28aaSamw return (B_FALSE); 163da6c28aaSamw 164b24ab676SJeff Bonwick return (strcmp(zn->zn_key_norm, norm) == 0); 165da6c28aaSamw } else { 166da6c28aaSamw /* MT_BEST or MT_EXACT */ 167b24ab676SJeff Bonwick return (strcmp(zn->zn_key_orig, matchname) == 0); 168da6c28aaSamw } 169da6c28aaSamw } 170da6c28aaSamw 171da6c28aaSamw void 172da6c28aaSamw zap_name_free(zap_name_t *zn) 173da6c28aaSamw { 174da6c28aaSamw kmem_free(zn, sizeof (zap_name_t)); 175da6c28aaSamw } 176da6c28aaSamw 177da6c28aaSamw zap_name_t * 178b24ab676SJeff Bonwick zap_name_alloc(zap_t *zap, const char *key, matchtype_t mt) 179da6c28aaSamw { 180da6c28aaSamw zap_name_t *zn = kmem_alloc(sizeof (zap_name_t), KM_SLEEP); 181da6c28aaSamw 182da6c28aaSamw zn->zn_zap = zap; 183b24ab676SJeff Bonwick zn->zn_key_intlen = sizeof (*key); 184b24ab676SJeff Bonwick zn->zn_key_orig = key; 185486ae710SMatthew Ahrens zn->zn_key_orig_numints = strlen(zn->zn_key_orig) + 1; 186da6c28aaSamw zn->zn_matchtype = mt; 187da6c28aaSamw if (zap->zap_normflags) { 188b24ab676SJeff Bonwick if (zap_normalize(zap, key, zn->zn_normbuf) != 0) { 189da6c28aaSamw zap_name_free(zn); 190da6c28aaSamw return (NULL); 191da6c28aaSamw } 192b24ab676SJeff Bonwick zn->zn_key_norm = zn->zn_normbuf; 193486ae710SMatthew Ahrens zn->zn_key_norm_numints = strlen(zn->zn_key_norm) + 1; 194da6c28aaSamw } else { 195da6c28aaSamw if (mt != MT_EXACT) { 196da6c28aaSamw zap_name_free(zn); 197da6c28aaSamw return (NULL); 198da6c28aaSamw } 199b24ab676SJeff Bonwick zn->zn_key_norm = zn->zn_key_orig; 200486ae710SMatthew Ahrens zn->zn_key_norm_numints = zn->zn_key_orig_numints; 201da6c28aaSamw } 202da6c28aaSamw 203b24ab676SJeff Bonwick zn->zn_hash = zap_hash(zn); 204b24ab676SJeff Bonwick return (zn); 205b24ab676SJeff Bonwick } 206b24ab676SJeff Bonwick 207b24ab676SJeff Bonwick zap_name_t * 208b24ab676SJeff Bonwick zap_name_alloc_uint64(zap_t *zap, const uint64_t *key, int numints) 209b24ab676SJeff Bonwick { 210b24ab676SJeff Bonwick zap_name_t *zn = kmem_alloc(sizeof (zap_name_t), KM_SLEEP); 211b24ab676SJeff Bonwick 212b24ab676SJeff Bonwick ASSERT(zap->zap_normflags == 0); 213b24ab676SJeff Bonwick zn->zn_zap = zap; 214b24ab676SJeff Bonwick zn->zn_key_intlen = sizeof (*key); 215b24ab676SJeff Bonwick zn->zn_key_orig = zn->zn_key_norm = key; 216486ae710SMatthew Ahrens zn->zn_key_orig_numints = zn->zn_key_norm_numints = numints; 217b24ab676SJeff Bonwick zn->zn_matchtype = MT_EXACT; 218b24ab676SJeff Bonwick 219b24ab676SJeff Bonwick zn->zn_hash = zap_hash(zn); 220da6c28aaSamw return (zn); 221da6c28aaSamw } 222da6c28aaSamw 223fa9e4066Sahrens static void 224fa9e4066Sahrens mzap_byteswap(mzap_phys_t *buf, size_t size) 225fa9e4066Sahrens { 226fa9e4066Sahrens int i, max; 227fa9e4066Sahrens buf->mz_block_type = BSWAP_64(buf->mz_block_type); 228fa9e4066Sahrens buf->mz_salt = BSWAP_64(buf->mz_salt); 229ab04eb8eStimh buf->mz_normflags = BSWAP_64(buf->mz_normflags); 230fa9e4066Sahrens max = (size / MZAP_ENT_LEN) - 1; 231fa9e4066Sahrens for (i = 0; i < max; i++) { 232fa9e4066Sahrens buf->mz_chunk[i].mze_value = 233fa9e4066Sahrens BSWAP_64(buf->mz_chunk[i].mze_value); 234fa9e4066Sahrens buf->mz_chunk[i].mze_cd = 235fa9e4066Sahrens BSWAP_32(buf->mz_chunk[i].mze_cd); 236fa9e4066Sahrens } 237fa9e4066Sahrens } 238fa9e4066Sahrens 239fa9e4066Sahrens void 240fa9e4066Sahrens zap_byteswap(void *buf, size_t size) 241fa9e4066Sahrens { 242fa9e4066Sahrens uint64_t block_type; 243fa9e4066Sahrens 244fa9e4066Sahrens block_type = *(uint64_t *)buf; 245fa9e4066Sahrens 2465ad82045Snd if (block_type == ZBT_MICRO || block_type == BSWAP_64(ZBT_MICRO)) { 247fa9e4066Sahrens /* ASSERT(magic == ZAP_LEAF_MAGIC); */ 248fa9e4066Sahrens mzap_byteswap(buf, size); 2495ad82045Snd } else { 250fa9e4066Sahrens fzap_byteswap(buf, size); 251fa9e4066Sahrens } 252fa9e4066Sahrens } 253fa9e4066Sahrens 254fa9e4066Sahrens static int 255fa9e4066Sahrens mze_compare(const void *arg1, const void *arg2) 256fa9e4066Sahrens { 257fa9e4066Sahrens const mzap_ent_t *mze1 = arg1; 258fa9e4066Sahrens const mzap_ent_t *mze2 = arg2; 259fa9e4066Sahrens 260fa9e4066Sahrens if (mze1->mze_hash > mze2->mze_hash) 261fa9e4066Sahrens return (+1); 262fa9e4066Sahrens if (mze1->mze_hash < mze2->mze_hash) 263fa9e4066Sahrens return (-1); 2643f9d6ad7SLin Ling if (mze1->mze_cd > mze2->mze_cd) 265fa9e4066Sahrens return (+1); 2663f9d6ad7SLin Ling if (mze1->mze_cd < mze2->mze_cd) 267fa9e4066Sahrens return (-1); 268fa9e4066Sahrens return (0); 269fa9e4066Sahrens } 270fa9e4066Sahrens 271fa9e4066Sahrens static void 2723f9d6ad7SLin Ling mze_insert(zap_t *zap, int chunkid, uint64_t hash) 273fa9e4066Sahrens { 274fa9e4066Sahrens mzap_ent_t *mze; 275fa9e4066Sahrens 276fa9e4066Sahrens ASSERT(zap->zap_ismicro); 277fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 278fa9e4066Sahrens 279fa9e4066Sahrens mze = kmem_alloc(sizeof (mzap_ent_t), KM_SLEEP); 280fa9e4066Sahrens mze->mze_chunkid = chunkid; 281fa9e4066Sahrens mze->mze_hash = hash; 2823f9d6ad7SLin Ling mze->mze_cd = MZE_PHYS(zap, mze)->mze_cd; 2833f9d6ad7SLin Ling ASSERT(MZE_PHYS(zap, mze)->mze_name[0] != 0); 284fa9e4066Sahrens avl_add(&zap->zap_m.zap_avl, mze); 285fa9e4066Sahrens } 286fa9e4066Sahrens 287fa9e4066Sahrens static mzap_ent_t * 288da6c28aaSamw mze_find(zap_name_t *zn) 289fa9e4066Sahrens { 290fa9e4066Sahrens mzap_ent_t mze_tofind; 291fa9e4066Sahrens mzap_ent_t *mze; 292fa9e4066Sahrens avl_index_t idx; 293da6c28aaSamw avl_tree_t *avl = &zn->zn_zap->zap_m.zap_avl; 294fa9e4066Sahrens 295da6c28aaSamw ASSERT(zn->zn_zap->zap_ismicro); 296da6c28aaSamw ASSERT(RW_LOCK_HELD(&zn->zn_zap->zap_rwlock)); 297fa9e4066Sahrens 298da6c28aaSamw mze_tofind.mze_hash = zn->zn_hash; 2993f9d6ad7SLin Ling mze_tofind.mze_cd = 0; 300fa9e4066Sahrens 301da6c28aaSamw again: 302fa9e4066Sahrens mze = avl_find(avl, &mze_tofind, &idx); 303fa9e4066Sahrens if (mze == NULL) 304fa9e4066Sahrens mze = avl_nearest(avl, idx, AVL_AFTER); 305da6c28aaSamw for (; mze && mze->mze_hash == zn->zn_hash; mze = AVL_NEXT(avl, mze)) { 3063f9d6ad7SLin Ling ASSERT3U(mze->mze_cd, ==, MZE_PHYS(zn->zn_zap, mze)->mze_cd); 3073f9d6ad7SLin Ling if (zap_match(zn, MZE_PHYS(zn->zn_zap, mze)->mze_name)) 308fa9e4066Sahrens return (mze); 309fa9e4066Sahrens } 310da6c28aaSamw if (zn->zn_matchtype == MT_BEST) { 311da6c28aaSamw zn->zn_matchtype = MT_FIRST; 312da6c28aaSamw goto again; 313da6c28aaSamw } 314fa9e4066Sahrens return (NULL); 315fa9e4066Sahrens } 316fa9e4066Sahrens 317fa9e4066Sahrens static uint32_t 318fa9e4066Sahrens mze_find_unused_cd(zap_t *zap, uint64_t hash) 319fa9e4066Sahrens { 320fa9e4066Sahrens mzap_ent_t mze_tofind; 321fa9e4066Sahrens mzap_ent_t *mze; 322fa9e4066Sahrens avl_index_t idx; 323fa9e4066Sahrens avl_tree_t *avl = &zap->zap_m.zap_avl; 324fa9e4066Sahrens uint32_t cd; 325fa9e4066Sahrens 326fa9e4066Sahrens ASSERT(zap->zap_ismicro); 327fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 328fa9e4066Sahrens 329fa9e4066Sahrens mze_tofind.mze_hash = hash; 3303f9d6ad7SLin Ling mze_tofind.mze_cd = 0; 331fa9e4066Sahrens 332fa9e4066Sahrens cd = 0; 333fa9e4066Sahrens for (mze = avl_find(avl, &mze_tofind, &idx); 334fa9e4066Sahrens mze && mze->mze_hash == hash; mze = AVL_NEXT(avl, mze)) { 3353f9d6ad7SLin Ling if (mze->mze_cd != cd) 336fa9e4066Sahrens break; 337fa9e4066Sahrens cd++; 338fa9e4066Sahrens } 339fa9e4066Sahrens 340fa9e4066Sahrens return (cd); 341fa9e4066Sahrens } 342fa9e4066Sahrens 343fa9e4066Sahrens static void 344fa9e4066Sahrens mze_remove(zap_t *zap, mzap_ent_t *mze) 345fa9e4066Sahrens { 346fa9e4066Sahrens ASSERT(zap->zap_ismicro); 347fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 348fa9e4066Sahrens 349fa9e4066Sahrens avl_remove(&zap->zap_m.zap_avl, mze); 350fa9e4066Sahrens kmem_free(mze, sizeof (mzap_ent_t)); 351fa9e4066Sahrens } 352fa9e4066Sahrens 353fa9e4066Sahrens static void 354fa9e4066Sahrens mze_destroy(zap_t *zap) 355fa9e4066Sahrens { 356fa9e4066Sahrens mzap_ent_t *mze; 357fa9e4066Sahrens void *avlcookie = NULL; 358fa9e4066Sahrens 359fa9e4066Sahrens while (mze = avl_destroy_nodes(&zap->zap_m.zap_avl, &avlcookie)) 360fa9e4066Sahrens kmem_free(mze, sizeof (mzap_ent_t)); 361fa9e4066Sahrens avl_destroy(&zap->zap_m.zap_avl); 362fa9e4066Sahrens } 363fa9e4066Sahrens 364fa9e4066Sahrens static zap_t * 365fa9e4066Sahrens mzap_open(objset_t *os, uint64_t obj, dmu_buf_t *db) 366fa9e4066Sahrens { 367fa9e4066Sahrens zap_t *winner; 368fa9e4066Sahrens zap_t *zap; 369fa9e4066Sahrens int i; 370*02525cd0SChunwei Chen uint64_t *zap_hdr = (uint64_t *)db->db_data; 371*02525cd0SChunwei Chen uint64_t zap_block_type = zap_hdr[0]; 372*02525cd0SChunwei Chen uint64_t zap_magic = zap_hdr[1]; 373fa9e4066Sahrens 374fa9e4066Sahrens ASSERT3U(MZAP_ENT_LEN, ==, sizeof (mzap_ent_phys_t)); 375fa9e4066Sahrens 376fa9e4066Sahrens zap = kmem_zalloc(sizeof (zap_t), KM_SLEEP); 377fa9e4066Sahrens rw_init(&zap->zap_rwlock, 0, 0, 0); 378fa9e4066Sahrens rw_enter(&zap->zap_rwlock, RW_WRITER); 379fa9e4066Sahrens zap->zap_objset = os; 380fa9e4066Sahrens zap->zap_object = obj; 381fa9e4066Sahrens zap->zap_dbuf = db; 382fa9e4066Sahrens 383*02525cd0SChunwei Chen if (zap_block_type != ZBT_MICRO) { 384fa9e4066Sahrens mutex_init(&zap->zap_f.zap_num_entries_mtx, 0, 0, 0); 385bf16b11eSMatthew Ahrens zap->zap_f.zap_block_shift = highbit64(db->db_size) - 1; 386*02525cd0SChunwei Chen if (zap_block_type != ZBT_HEADER || zap_magic != ZAP_MAGIC) { 387*02525cd0SChunwei Chen winner = NULL; /* No actual winner here... */ 388*02525cd0SChunwei Chen goto handle_winner; 389*02525cd0SChunwei Chen } 390fa9e4066Sahrens } else { 391fa9e4066Sahrens zap->zap_ismicro = TRUE; 392fa9e4066Sahrens } 393fa9e4066Sahrens 394fa9e4066Sahrens /* 395fa9e4066Sahrens * Make sure that zap_ismicro is set before we let others see 396fa9e4066Sahrens * it, because zap_lockdir() checks zap_ismicro without the lock 397fa9e4066Sahrens * held. 398fa9e4066Sahrens */ 399bc9014e6SJustin Gibbs dmu_buf_init_user(&zap->zap_dbu, zap_evict, &zap->zap_dbuf); 400bc9014e6SJustin Gibbs winner = dmu_buf_set_user(db, &zap->zap_dbu); 401fa9e4066Sahrens 402*02525cd0SChunwei Chen if (winner != NULL) 403*02525cd0SChunwei Chen goto handle_winner; 404fa9e4066Sahrens 405fa9e4066Sahrens if (zap->zap_ismicro) { 406c1379625SJustin T. Gibbs zap->zap_salt = zap_m_phys(zap)->mz_salt; 407c1379625SJustin T. Gibbs zap->zap_normflags = zap_m_phys(zap)->mz_normflags; 408fa9e4066Sahrens zap->zap_m.zap_num_chunks = db->db_size / MZAP_ENT_LEN - 1; 409fa9e4066Sahrens avl_create(&zap->zap_m.zap_avl, mze_compare, 410fa9e4066Sahrens sizeof (mzap_ent_t), offsetof(mzap_ent_t, mze_node)); 411fa9e4066Sahrens 412fa9e4066Sahrens for (i = 0; i < zap->zap_m.zap_num_chunks; i++) { 413fa9e4066Sahrens mzap_ent_phys_t *mze = 414c1379625SJustin T. Gibbs &zap_m_phys(zap)->mz_chunk[i]; 415fa9e4066Sahrens if (mze->mze_name[0]) { 416da6c28aaSamw zap_name_t *zn; 417da6c28aaSamw 418fa9e4066Sahrens zap->zap_m.zap_num_entries++; 419da6c28aaSamw zn = zap_name_alloc(zap, mze->mze_name, 420da6c28aaSamw MT_EXACT); 4213f9d6ad7SLin Ling mze_insert(zap, i, zn->zn_hash); 422da6c28aaSamw zap_name_free(zn); 423fa9e4066Sahrens } 424fa9e4066Sahrens } 425fa9e4066Sahrens } else { 426c1379625SJustin T. Gibbs zap->zap_salt = zap_f_phys(zap)->zap_salt; 427c1379625SJustin T. Gibbs zap->zap_normflags = zap_f_phys(zap)->zap_normflags; 428f65e61c0Sahrens 429f65e61c0Sahrens ASSERT3U(sizeof (struct zap_leaf_header), ==, 430f65e61c0Sahrens 2*ZAP_LEAF_CHUNKSIZE); 431f65e61c0Sahrens 432f65e61c0Sahrens /* 433f65e61c0Sahrens * The embedded pointer table should not overlap the 434f65e61c0Sahrens * other members. 435f65e61c0Sahrens */ 436f65e61c0Sahrens ASSERT3P(&ZAP_EMBEDDED_PTRTBL_ENT(zap, 0), >, 437c1379625SJustin T. Gibbs &zap_f_phys(zap)->zap_salt); 438f65e61c0Sahrens 439f65e61c0Sahrens /* 440f65e61c0Sahrens * The embedded pointer table should end at the end of 441f65e61c0Sahrens * the block 442f65e61c0Sahrens */ 443f65e61c0Sahrens ASSERT3U((uintptr_t)&ZAP_EMBEDDED_PTRTBL_ENT(zap, 444f65e61c0Sahrens 1<<ZAP_EMBEDDED_PTRTBL_SHIFT(zap)) - 445c1379625SJustin T. Gibbs (uintptr_t)zap_f_phys(zap), ==, 446f65e61c0Sahrens zap->zap_dbuf->db_size); 447fa9e4066Sahrens } 448fa9e4066Sahrens rw_exit(&zap->zap_rwlock); 449fa9e4066Sahrens return (zap); 450*02525cd0SChunwei Chen 451*02525cd0SChunwei Chen handle_winner: 452*02525cd0SChunwei Chen rw_exit(&zap->zap_rwlock); 453*02525cd0SChunwei Chen rw_destroy(&zap->zap_rwlock); 454*02525cd0SChunwei Chen if (!zap->zap_ismicro) 455*02525cd0SChunwei Chen mutex_destroy(&zap->zap_f.zap_num_entries_mtx); 456*02525cd0SChunwei Chen kmem_free(zap, sizeof (zap_t)); 457*02525cd0SChunwei Chen return (winner); 458fa9e4066Sahrens } 459fa9e4066Sahrens 460fa9e4066Sahrens int 461fa9e4066Sahrens zap_lockdir(objset_t *os, uint64_t obj, dmu_tx_t *tx, 462c5f9e431Sahrens krw_t lti, boolean_t fatreader, boolean_t adding, zap_t **zapp) 463fa9e4066Sahrens { 464fa9e4066Sahrens zap_t *zap; 465fa9e4066Sahrens dmu_buf_t *db; 466fa9e4066Sahrens krw_t lt; 467fa9e4066Sahrens int err; 468fa9e4066Sahrens 469fa9e4066Sahrens *zapp = NULL; 470fa9e4066Sahrens 47147cb52daSJeff Bonwick err = dmu_buf_hold(os, obj, 0, NULL, &db, DMU_READ_NO_PREFETCH); 472ea8dc4b6Seschrock if (err) 473ea8dc4b6Seschrock return (err); 474fa9e4066Sahrens 475fa9e4066Sahrens #ifdef ZFS_DEBUG 476fa9e4066Sahrens { 477fa9e4066Sahrens dmu_object_info_t doi; 478fa9e4066Sahrens dmu_object_info_from_db(db, &doi); 479ad135b5dSChristopher Siden ASSERT3U(DMU_OT_BYTESWAP(doi.doi_type), ==, DMU_BSWAP_ZAP); 480fa9e4066Sahrens } 481fa9e4066Sahrens #endif 482fa9e4066Sahrens 483fa9e4066Sahrens zap = dmu_buf_get_user(db); 484*02525cd0SChunwei Chen if (zap == NULL) { 485fa9e4066Sahrens zap = mzap_open(os, obj, db); 486*02525cd0SChunwei Chen if (zap == NULL) { 487*02525cd0SChunwei Chen /* 488*02525cd0SChunwei Chen * mzap_open() didn't like what it saw on-disk. 489*02525cd0SChunwei Chen * Check for corruption! 490*02525cd0SChunwei Chen */ 491*02525cd0SChunwei Chen dmu_buf_rele(db, NULL); 492*02525cd0SChunwei Chen return (SET_ERROR(EIO)); 493*02525cd0SChunwei Chen } 494*02525cd0SChunwei Chen } 495fa9e4066Sahrens 496fa9e4066Sahrens /* 497fa9e4066Sahrens * We're checking zap_ismicro without the lock held, in order to 498fa9e4066Sahrens * tell what type of lock we want. Once we have some sort of 499fa9e4066Sahrens * lock, see if it really is the right type. In practice this 500fa9e4066Sahrens * can only be different if it was upgraded from micro to fat, 501fa9e4066Sahrens * and micro wanted WRITER but fat only needs READER. 502fa9e4066Sahrens */ 503fa9e4066Sahrens lt = (!zap->zap_ismicro && fatreader) ? RW_READER : lti; 504fa9e4066Sahrens rw_enter(&zap->zap_rwlock, lt); 505fa9e4066Sahrens if (lt != ((!zap->zap_ismicro && fatreader) ? RW_READER : lti)) { 506fa9e4066Sahrens /* it was upgraded, now we only need reader */ 507fa9e4066Sahrens ASSERT(lt == RW_WRITER); 508fa9e4066Sahrens ASSERT(RW_READER == 509fa9e4066Sahrens (!zap->zap_ismicro && fatreader) ? RW_READER : lti); 510fa9e4066Sahrens rw_downgrade(&zap->zap_rwlock); 511fa9e4066Sahrens lt = RW_READER; 512fa9e4066Sahrens } 513fa9e4066Sahrens 514fa9e4066Sahrens zap->zap_objset = os; 515fa9e4066Sahrens 516fa9e4066Sahrens if (lt == RW_WRITER) 517fa9e4066Sahrens dmu_buf_will_dirty(db, tx); 518fa9e4066Sahrens 519fa9e4066Sahrens ASSERT3P(zap->zap_dbuf, ==, db); 520fa9e4066Sahrens 521fa9e4066Sahrens ASSERT(!zap->zap_ismicro || 522fa9e4066Sahrens zap->zap_m.zap_num_entries <= zap->zap_m.zap_num_chunks); 523c5f9e431Sahrens if (zap->zap_ismicro && tx && adding && 524fa9e4066Sahrens zap->zap_m.zap_num_entries == zap->zap_m.zap_num_chunks) { 525fa9e4066Sahrens uint64_t newsz = db->db_size + SPA_MINBLOCKSIZE; 526fa9e4066Sahrens if (newsz > MZAP_MAX_BLKSZ) { 527fa9e4066Sahrens dprintf("upgrading obj %llu: num_entries=%u\n", 528fa9e4066Sahrens obj, zap->zap_m.zap_num_entries); 529fa9e4066Sahrens *zapp = zap; 530b24ab676SJeff Bonwick return (mzap_upgrade(zapp, tx, 0)); 531fa9e4066Sahrens } 532fa9e4066Sahrens err = dmu_object_set_blocksize(os, obj, newsz, 0, tx); 533fb09f5aaSMadhav Suresh ASSERT0(err); 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 542fa9e4066Sahrens void 543fa9e4066Sahrens zap_unlockdir(zap_t *zap) 544fa9e4066Sahrens { 545fa9e4066Sahrens rw_exit(&zap->zap_rwlock); 546ea8dc4b6Seschrock dmu_buf_rele(zap->zap_dbuf, NULL); 547fa9e4066Sahrens } 548fa9e4066Sahrens 549ad860c82Sbonwick static int 550b24ab676SJeff Bonwick mzap_upgrade(zap_t **zapp, dmu_tx_t *tx, zap_flags_t flags) 551fa9e4066Sahrens { 552fa9e4066Sahrens mzap_phys_t *mzp; 553b24ab676SJeff Bonwick int i, sz, nchunks; 554b24ab676SJeff Bonwick int err = 0; 555ad860c82Sbonwick zap_t *zap = *zapp; 556fa9e4066Sahrens 557fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 558fa9e4066Sahrens 559fa9e4066Sahrens sz = zap->zap_dbuf->db_size; 560be3e2ab9SBrian Behlendorf mzp = zio_buf_alloc(sz); 561fa9e4066Sahrens bcopy(zap->zap_dbuf->db_data, mzp, sz); 562fa9e4066Sahrens nchunks = zap->zap_m.zap_num_chunks; 563fa9e4066Sahrens 564b24ab676SJeff Bonwick if (!flags) { 565b24ab676SJeff Bonwick err = dmu_object_set_blocksize(zap->zap_objset, zap->zap_object, 566b24ab676SJeff Bonwick 1ULL << fzap_default_block_shift, 0, tx); 567b24ab676SJeff Bonwick if (err) { 568be3e2ab9SBrian Behlendorf zio_buf_free(mzp, sz); 569b24ab676SJeff Bonwick return (err); 570b24ab676SJeff Bonwick } 571ad860c82Sbonwick } 572fa9e4066Sahrens 573fa9e4066Sahrens dprintf("upgrading obj=%llu with %u chunks\n", 574fa9e4066Sahrens zap->zap_object, nchunks); 575da6c28aaSamw /* XXX destroy the avl later, so we can use the stored hash value */ 576fa9e4066Sahrens mze_destroy(zap); 577fa9e4066Sahrens 578b24ab676SJeff Bonwick fzap_upgrade(zap, tx, flags); 579fa9e4066Sahrens 580fa9e4066Sahrens for (i = 0; i < nchunks; i++) { 581fa9e4066Sahrens mzap_ent_phys_t *mze = &mzp->mz_chunk[i]; 582da6c28aaSamw zap_name_t *zn; 583fa9e4066Sahrens if (mze->mze_name[0] == 0) 584fa9e4066Sahrens continue; 585fa9e4066Sahrens dprintf("adding %s=%llu\n", 586fa9e4066Sahrens mze->mze_name, mze->mze_value); 587da6c28aaSamw zn = zap_name_alloc(zap, mze->mze_name, MT_EXACT); 588ad860c82Sbonwick err = fzap_add_cd(zn, 8, 1, &mze->mze_value, mze->mze_cd, tx); 589ad860c82Sbonwick zap = zn->zn_zap; /* fzap_add_cd() may change zap */ 590da6c28aaSamw zap_name_free(zn); 591ad860c82Sbonwick if (err) 592ad860c82Sbonwick break; 593fa9e4066Sahrens } 594be3e2ab9SBrian Behlendorf zio_buf_free(mzp, sz); 595ad860c82Sbonwick *zapp = zap; 596ad860c82Sbonwick return (err); 597fa9e4066Sahrens } 598fa9e4066Sahrens 5992acef22dSMatthew Ahrens void 600b24ab676SJeff Bonwick mzap_create_impl(objset_t *os, uint64_t obj, int normflags, zap_flags_t flags, 601b24ab676SJeff Bonwick dmu_tx_t *tx) 602fa9e4066Sahrens { 603fa9e4066Sahrens dmu_buf_t *db; 604fa9e4066Sahrens mzap_phys_t *zp; 605fa9e4066Sahrens 60647cb52daSJeff Bonwick VERIFY(0 == dmu_buf_hold(os, obj, 0, FTAG, &db, DMU_READ_NO_PREFETCH)); 607fa9e4066Sahrens 608fa9e4066Sahrens #ifdef ZFS_DEBUG 609fa9e4066Sahrens { 610fa9e4066Sahrens dmu_object_info_t doi; 611fa9e4066Sahrens dmu_object_info_from_db(db, &doi); 612ad135b5dSChristopher Siden ASSERT3U(DMU_OT_BYTESWAP(doi.doi_type), ==, DMU_BSWAP_ZAP); 613fa9e4066Sahrens } 614fa9e4066Sahrens #endif 615fa9e4066Sahrens 616fa9e4066Sahrens dmu_buf_will_dirty(db, tx); 617fa9e4066Sahrens zp = db->db_data; 618fa9e4066Sahrens zp->mz_block_type = ZBT_MICRO; 619fa9e4066Sahrens zp->mz_salt = ((uintptr_t)db ^ (uintptr_t)tx ^ (obj << 1)) | 1ULL; 620da6c28aaSamw zp->mz_normflags = normflags; 621ea8dc4b6Seschrock dmu_buf_rele(db, FTAG); 622b24ab676SJeff Bonwick 623b24ab676SJeff Bonwick if (flags != 0) { 624b24ab676SJeff Bonwick zap_t *zap; 625b24ab676SJeff Bonwick /* Only fat zap supports flags; upgrade immediately. */ 626b24ab676SJeff Bonwick VERIFY(0 == zap_lockdir(os, obj, tx, RW_WRITER, 627b24ab676SJeff Bonwick B_FALSE, B_FALSE, &zap)); 628b420f3adSRichard Lowe VERIFY3U(0, ==, mzap_upgrade(&zap, tx, flags)); 629b24ab676SJeff Bonwick zap_unlockdir(zap); 630b24ab676SJeff Bonwick } 631fa9e4066Sahrens } 632fa9e4066Sahrens 633fa9e4066Sahrens int 634fa9e4066Sahrens zap_create_claim(objset_t *os, uint64_t obj, dmu_object_type_t ot, 635fa9e4066Sahrens dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) 636da6c28aaSamw { 637da6c28aaSamw return (zap_create_claim_norm(os, obj, 638da6c28aaSamw 0, ot, bonustype, bonuslen, tx)); 639da6c28aaSamw } 640da6c28aaSamw 641da6c28aaSamw int 642da6c28aaSamw zap_create_claim_norm(objset_t *os, uint64_t obj, int normflags, 643da6c28aaSamw dmu_object_type_t ot, 644da6c28aaSamw dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) 645fa9e4066Sahrens { 646fa9e4066Sahrens int err; 647fa9e4066Sahrens 648fa9e4066Sahrens err = dmu_object_claim(os, obj, ot, 0, bonustype, bonuslen, tx); 649fa9e4066Sahrens if (err != 0) 650fa9e4066Sahrens return (err); 651b24ab676SJeff Bonwick mzap_create_impl(os, obj, normflags, 0, tx); 652fa9e4066Sahrens return (0); 653fa9e4066Sahrens } 654fa9e4066Sahrens 655fa9e4066Sahrens uint64_t 656fa9e4066Sahrens zap_create(objset_t *os, dmu_object_type_t ot, 657fa9e4066Sahrens dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) 658da6c28aaSamw { 659da6c28aaSamw return (zap_create_norm(os, 0, ot, bonustype, bonuslen, tx)); 660da6c28aaSamw } 661da6c28aaSamw 662da6c28aaSamw uint64_t 663da6c28aaSamw zap_create_norm(objset_t *os, int normflags, dmu_object_type_t ot, 664da6c28aaSamw dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) 665fa9e4066Sahrens { 666fa9e4066Sahrens uint64_t obj = dmu_object_alloc(os, ot, 0, bonustype, bonuslen, tx); 667fa9e4066Sahrens 668b24ab676SJeff Bonwick mzap_create_impl(os, obj, normflags, 0, tx); 669b24ab676SJeff Bonwick return (obj); 670b24ab676SJeff Bonwick } 671b24ab676SJeff Bonwick 672b24ab676SJeff Bonwick uint64_t 673b24ab676SJeff Bonwick zap_create_flags(objset_t *os, int normflags, zap_flags_t flags, 674b24ab676SJeff Bonwick dmu_object_type_t ot, int leaf_blockshift, int indirect_blockshift, 675b24ab676SJeff Bonwick dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) 676b24ab676SJeff Bonwick { 677b24ab676SJeff Bonwick uint64_t obj = dmu_object_alloc(os, ot, 0, bonustype, bonuslen, tx); 678b24ab676SJeff Bonwick 679b24ab676SJeff Bonwick ASSERT(leaf_blockshift >= SPA_MINBLOCKSHIFT && 680b5152584SMatthew Ahrens leaf_blockshift <= SPA_OLD_MAXBLOCKSHIFT && 681b24ab676SJeff Bonwick indirect_blockshift >= SPA_MINBLOCKSHIFT && 682b5152584SMatthew Ahrens indirect_blockshift <= SPA_OLD_MAXBLOCKSHIFT); 683b24ab676SJeff Bonwick 684b24ab676SJeff Bonwick VERIFY(dmu_object_set_blocksize(os, obj, 685b24ab676SJeff Bonwick 1ULL << leaf_blockshift, indirect_blockshift, tx) == 0); 686b24ab676SJeff Bonwick 687b24ab676SJeff Bonwick mzap_create_impl(os, obj, normflags, flags, tx); 688fa9e4066Sahrens return (obj); 689fa9e4066Sahrens } 690fa9e4066Sahrens 691fa9e4066Sahrens int 692fa9e4066Sahrens zap_destroy(objset_t *os, uint64_t zapobj, dmu_tx_t *tx) 693fa9e4066Sahrens { 694fa9e4066Sahrens /* 695fa9e4066Sahrens * dmu_object_free will free the object number and free the 696fa9e4066Sahrens * data. Freeing the data will cause our pageout function to be 697fa9e4066Sahrens * called, which will destroy our data (zap_leaf_t's and zap_t). 698fa9e4066Sahrens */ 699fa9e4066Sahrens 700fa9e4066Sahrens return (dmu_object_free(os, zapobj, tx)); 701fa9e4066Sahrens } 702fa9e4066Sahrens 703fa9e4066Sahrens void 704bc9014e6SJustin Gibbs zap_evict(void *dbu) 705fa9e4066Sahrens { 706bc9014e6SJustin Gibbs zap_t *zap = dbu; 707fa9e4066Sahrens 708fa9e4066Sahrens rw_destroy(&zap->zap_rwlock); 709fa9e4066Sahrens 710f65e61c0Sahrens if (zap->zap_ismicro) 711fa9e4066Sahrens mze_destroy(zap); 712c25056deSgw else 713c25056deSgw mutex_destroy(&zap->zap_f.zap_num_entries_mtx); 714fa9e4066Sahrens 715fa9e4066Sahrens kmem_free(zap, sizeof (zap_t)); 716fa9e4066Sahrens } 717fa9e4066Sahrens 718fa9e4066Sahrens int 719fa9e4066Sahrens zap_count(objset_t *os, uint64_t zapobj, uint64_t *count) 720fa9e4066Sahrens { 721fa9e4066Sahrens zap_t *zap; 722fa9e4066Sahrens int err; 723fa9e4066Sahrens 724c5f9e431Sahrens err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); 725fa9e4066Sahrens if (err) 726fa9e4066Sahrens return (err); 727fa9e4066Sahrens if (!zap->zap_ismicro) { 728fa9e4066Sahrens err = fzap_count(zap, count); 729fa9e4066Sahrens } else { 730fa9e4066Sahrens *count = zap->zap_m.zap_num_entries; 731fa9e4066Sahrens } 732fa9e4066Sahrens zap_unlockdir(zap); 733fa9e4066Sahrens return (err); 734fa9e4066Sahrens } 735fa9e4066Sahrens 736fa9e4066Sahrens /* 737da6c28aaSamw * zn may be NULL; if not specified, it will be computed if needed. 738da6c28aaSamw * See also the comment above zap_entry_normalization_conflict(). 739da6c28aaSamw */ 740da6c28aaSamw static boolean_t 741da6c28aaSamw mzap_normalization_conflict(zap_t *zap, zap_name_t *zn, mzap_ent_t *mze) 742da6c28aaSamw { 743da6c28aaSamw mzap_ent_t *other; 744da6c28aaSamw int direction = AVL_BEFORE; 745da6c28aaSamw boolean_t allocdzn = B_FALSE; 746da6c28aaSamw 747da6c28aaSamw if (zap->zap_normflags == 0) 748da6c28aaSamw return (B_FALSE); 749da6c28aaSamw 750da6c28aaSamw again: 751da6c28aaSamw for (other = avl_walk(&zap->zap_m.zap_avl, mze, direction); 752da6c28aaSamw other && other->mze_hash == mze->mze_hash; 753da6c28aaSamw other = avl_walk(&zap->zap_m.zap_avl, other, direction)) { 754da6c28aaSamw 755da6c28aaSamw if (zn == NULL) { 7563f9d6ad7SLin Ling zn = zap_name_alloc(zap, MZE_PHYS(zap, mze)->mze_name, 757da6c28aaSamw MT_FIRST); 758da6c28aaSamw allocdzn = B_TRUE; 759da6c28aaSamw } 7603f9d6ad7SLin Ling if (zap_match(zn, MZE_PHYS(zap, other)->mze_name)) { 761da6c28aaSamw if (allocdzn) 762da6c28aaSamw zap_name_free(zn); 763da6c28aaSamw return (B_TRUE); 764da6c28aaSamw } 765da6c28aaSamw } 766da6c28aaSamw 767da6c28aaSamw if (direction == AVL_BEFORE) { 768da6c28aaSamw direction = AVL_AFTER; 769da6c28aaSamw goto again; 770da6c28aaSamw } 771da6c28aaSamw 772da6c28aaSamw if (allocdzn) 773da6c28aaSamw zap_name_free(zn); 774da6c28aaSamw return (B_FALSE); 775da6c28aaSamw } 776da6c28aaSamw 777da6c28aaSamw /* 778da6c28aaSamw * Routines for manipulating attributes. 779fa9e4066Sahrens */ 780fa9e4066Sahrens 781fa9e4066Sahrens int 782fa9e4066Sahrens zap_lookup(objset_t *os, uint64_t zapobj, const char *name, 783fa9e4066Sahrens uint64_t integer_size, uint64_t num_integers, void *buf) 784da6c28aaSamw { 785da6c28aaSamw return (zap_lookup_norm(os, zapobj, name, integer_size, 786da6c28aaSamw num_integers, buf, MT_EXACT, NULL, 0, NULL)); 787da6c28aaSamw } 788da6c28aaSamw 789da6c28aaSamw int 790da6c28aaSamw zap_lookup_norm(objset_t *os, uint64_t zapobj, const char *name, 791da6c28aaSamw uint64_t integer_size, uint64_t num_integers, void *buf, 792da6c28aaSamw matchtype_t mt, char *realname, int rn_len, 793da6c28aaSamw boolean_t *ncp) 794fa9e4066Sahrens { 795fa9e4066Sahrens zap_t *zap; 796fa9e4066Sahrens int err; 797fa9e4066Sahrens mzap_ent_t *mze; 798da6c28aaSamw zap_name_t *zn; 799fa9e4066Sahrens 800c5f9e431Sahrens err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); 801fa9e4066Sahrens if (err) 802fa9e4066Sahrens return (err); 803da6c28aaSamw zn = zap_name_alloc(zap, name, mt); 804da6c28aaSamw if (zn == NULL) { 805da6c28aaSamw zap_unlockdir(zap); 806be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 807da6c28aaSamw } 808da6c28aaSamw 809fa9e4066Sahrens if (!zap->zap_ismicro) { 810da6c28aaSamw err = fzap_lookup(zn, integer_size, num_integers, buf, 811da6c28aaSamw realname, rn_len, ncp); 812fa9e4066Sahrens } else { 813da6c28aaSamw mze = mze_find(zn); 814fa9e4066Sahrens if (mze == NULL) { 815be6fd75aSMatthew Ahrens err = SET_ERROR(ENOENT); 816fa9e4066Sahrens } else { 817da6c28aaSamw if (num_integers < 1) { 818be6fd75aSMatthew Ahrens err = SET_ERROR(EOVERFLOW); 819da6c28aaSamw } else if (integer_size != 8) { 820be6fd75aSMatthew Ahrens err = SET_ERROR(EINVAL); 821da6c28aaSamw } else { 8223f9d6ad7SLin Ling *(uint64_t *)buf = 8233f9d6ad7SLin Ling MZE_PHYS(zap, mze)->mze_value; 824da6c28aaSamw (void) strlcpy(realname, 8253f9d6ad7SLin Ling MZE_PHYS(zap, mze)->mze_name, rn_len); 826da6c28aaSamw if (ncp) { 827da6c28aaSamw *ncp = mzap_normalization_conflict(zap, 828da6c28aaSamw zn, mze); 829da6c28aaSamw } 830da6c28aaSamw } 831fa9e4066Sahrens } 832fa9e4066Sahrens } 833da6c28aaSamw zap_name_free(zn); 834fa9e4066Sahrens zap_unlockdir(zap); 835fa9e4066Sahrens return (err); 836fa9e4066Sahrens } 837fa9e4066Sahrens 838c7cd2421SGeorge Wilson int 839c7cd2421SGeorge Wilson zap_prefetch_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, 840c7cd2421SGeorge Wilson int key_numints) 841c7cd2421SGeorge Wilson { 842c7cd2421SGeorge Wilson zap_t *zap; 843c7cd2421SGeorge Wilson int err; 844c7cd2421SGeorge Wilson zap_name_t *zn; 845c7cd2421SGeorge Wilson 846c7cd2421SGeorge Wilson err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); 847c7cd2421SGeorge Wilson if (err) 848c7cd2421SGeorge Wilson return (err); 849c7cd2421SGeorge Wilson zn = zap_name_alloc_uint64(zap, key, key_numints); 850c7cd2421SGeorge Wilson if (zn == NULL) { 851c7cd2421SGeorge Wilson zap_unlockdir(zap); 852be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 853c7cd2421SGeorge Wilson } 854c7cd2421SGeorge Wilson 855c7cd2421SGeorge Wilson fzap_prefetch(zn); 856c7cd2421SGeorge Wilson zap_name_free(zn); 857c7cd2421SGeorge Wilson zap_unlockdir(zap); 858c7cd2421SGeorge Wilson return (err); 859c7cd2421SGeorge Wilson } 860c7cd2421SGeorge Wilson 861b24ab676SJeff Bonwick int 862b24ab676SJeff Bonwick zap_lookup_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, 863b24ab676SJeff Bonwick int key_numints, uint64_t integer_size, uint64_t num_integers, void *buf) 864b24ab676SJeff Bonwick { 865b24ab676SJeff Bonwick zap_t *zap; 866b24ab676SJeff Bonwick int err; 867b24ab676SJeff Bonwick zap_name_t *zn; 868b24ab676SJeff Bonwick 869b24ab676SJeff Bonwick err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); 870b24ab676SJeff Bonwick if (err) 871b24ab676SJeff Bonwick return (err); 872b24ab676SJeff Bonwick zn = zap_name_alloc_uint64(zap, key, key_numints); 873b24ab676SJeff Bonwick if (zn == NULL) { 874b24ab676SJeff Bonwick zap_unlockdir(zap); 875be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 876b24ab676SJeff Bonwick } 877b24ab676SJeff Bonwick 878b24ab676SJeff Bonwick err = fzap_lookup(zn, integer_size, num_integers, buf, 879b24ab676SJeff Bonwick NULL, 0, NULL); 880b24ab676SJeff Bonwick zap_name_free(zn); 881b24ab676SJeff Bonwick zap_unlockdir(zap); 882b24ab676SJeff Bonwick return (err); 883b24ab676SJeff Bonwick } 884b24ab676SJeff Bonwick 88592241e0bSTom Erickson int 88692241e0bSTom Erickson zap_contains(objset_t *os, uint64_t zapobj, const char *name) 88792241e0bSTom Erickson { 8882acef22dSMatthew Ahrens int err = zap_lookup_norm(os, zapobj, name, 0, 8892acef22dSMatthew Ahrens 0, NULL, MT_EXACT, NULL, 0, NULL); 89092241e0bSTom Erickson if (err == EOVERFLOW || err == EINVAL) 89192241e0bSTom Erickson err = 0; /* found, but skipped reading the value */ 89292241e0bSTom Erickson return (err); 89392241e0bSTom Erickson } 89492241e0bSTom Erickson 895fa9e4066Sahrens int 896fa9e4066Sahrens zap_length(objset_t *os, uint64_t zapobj, const char *name, 897fa9e4066Sahrens uint64_t *integer_size, uint64_t *num_integers) 898fa9e4066Sahrens { 899fa9e4066Sahrens zap_t *zap; 900fa9e4066Sahrens int err; 901fa9e4066Sahrens mzap_ent_t *mze; 902da6c28aaSamw zap_name_t *zn; 903fa9e4066Sahrens 904c5f9e431Sahrens err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); 905fa9e4066Sahrens if (err) 906fa9e4066Sahrens return (err); 907da6c28aaSamw zn = zap_name_alloc(zap, name, MT_EXACT); 908da6c28aaSamw if (zn == NULL) { 909da6c28aaSamw zap_unlockdir(zap); 910be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 911da6c28aaSamw } 912fa9e4066Sahrens if (!zap->zap_ismicro) { 913da6c28aaSamw err = fzap_length(zn, integer_size, num_integers); 914fa9e4066Sahrens } else { 915da6c28aaSamw mze = mze_find(zn); 916fa9e4066Sahrens if (mze == NULL) { 917be6fd75aSMatthew Ahrens err = SET_ERROR(ENOENT); 918fa9e4066Sahrens } else { 919fa9e4066Sahrens if (integer_size) 920fa9e4066Sahrens *integer_size = 8; 921fa9e4066Sahrens if (num_integers) 922fa9e4066Sahrens *num_integers = 1; 923fa9e4066Sahrens } 924fa9e4066Sahrens } 925da6c28aaSamw zap_name_free(zn); 926fa9e4066Sahrens zap_unlockdir(zap); 927fa9e4066Sahrens return (err); 928fa9e4066Sahrens } 929fa9e4066Sahrens 930b24ab676SJeff Bonwick int 931b24ab676SJeff Bonwick zap_length_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, 932b24ab676SJeff Bonwick int key_numints, uint64_t *integer_size, uint64_t *num_integers) 933b24ab676SJeff Bonwick { 934b24ab676SJeff Bonwick zap_t *zap; 935b24ab676SJeff Bonwick int err; 936b24ab676SJeff Bonwick zap_name_t *zn; 937b24ab676SJeff Bonwick 938b24ab676SJeff Bonwick err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); 939b24ab676SJeff Bonwick if (err) 940b24ab676SJeff Bonwick return (err); 941b24ab676SJeff Bonwick zn = zap_name_alloc_uint64(zap, key, key_numints); 942b24ab676SJeff Bonwick if (zn == NULL) { 943b24ab676SJeff Bonwick zap_unlockdir(zap); 944be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 945b24ab676SJeff Bonwick } 946b24ab676SJeff Bonwick err = fzap_length(zn, integer_size, num_integers); 947b24ab676SJeff Bonwick zap_name_free(zn); 948b24ab676SJeff Bonwick zap_unlockdir(zap); 949b24ab676SJeff Bonwick return (err); 950b24ab676SJeff Bonwick } 951b24ab676SJeff Bonwick 952fa9e4066Sahrens static void 953da6c28aaSamw mzap_addent(zap_name_t *zn, uint64_t value) 954fa9e4066Sahrens { 955fa9e4066Sahrens int i; 956da6c28aaSamw zap_t *zap = zn->zn_zap; 957fa9e4066Sahrens int start = zap->zap_m.zap_alloc_next; 958fa9e4066Sahrens uint32_t cd; 959fa9e4066Sahrens 960fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 961fa9e4066Sahrens 962fa9e4066Sahrens #ifdef ZFS_DEBUG 963fa9e4066Sahrens for (i = 0; i < zap->zap_m.zap_num_chunks; i++) { 964c1379625SJustin T. Gibbs mzap_ent_phys_t *mze = &zap_m_phys(zap)->mz_chunk[i]; 965b24ab676SJeff Bonwick ASSERT(strcmp(zn->zn_key_orig, mze->mze_name) != 0); 966fa9e4066Sahrens } 967fa9e4066Sahrens #endif 968fa9e4066Sahrens 969da6c28aaSamw cd = mze_find_unused_cd(zap, zn->zn_hash); 970fa9e4066Sahrens /* given the limited size of the microzap, this can't happen */ 971b24ab676SJeff Bonwick ASSERT(cd < zap_maxcd(zap)); 972fa9e4066Sahrens 973fa9e4066Sahrens again: 974fa9e4066Sahrens for (i = start; i < zap->zap_m.zap_num_chunks; i++) { 975c1379625SJustin T. Gibbs mzap_ent_phys_t *mze = &zap_m_phys(zap)->mz_chunk[i]; 976fa9e4066Sahrens if (mze->mze_name[0] == 0) { 977fa9e4066Sahrens mze->mze_value = value; 978fa9e4066Sahrens mze->mze_cd = cd; 979b24ab676SJeff Bonwick (void) strcpy(mze->mze_name, zn->zn_key_orig); 980fa9e4066Sahrens zap->zap_m.zap_num_entries++; 981fa9e4066Sahrens zap->zap_m.zap_alloc_next = i+1; 982fa9e4066Sahrens if (zap->zap_m.zap_alloc_next == 983fa9e4066Sahrens zap->zap_m.zap_num_chunks) 984fa9e4066Sahrens zap->zap_m.zap_alloc_next = 0; 9853f9d6ad7SLin Ling mze_insert(zap, i, zn->zn_hash); 986fa9e4066Sahrens return; 987fa9e4066Sahrens } 988fa9e4066Sahrens } 989fa9e4066Sahrens if (start != 0) { 990fa9e4066Sahrens start = 0; 991fa9e4066Sahrens goto again; 992fa9e4066Sahrens } 993fa9e4066Sahrens ASSERT(!"out of entries!"); 994fa9e4066Sahrens } 995fa9e4066Sahrens 996fa9e4066Sahrens int 997b24ab676SJeff Bonwick zap_add(objset_t *os, uint64_t zapobj, const char *key, 998fa9e4066Sahrens int integer_size, uint64_t num_integers, 999fa9e4066Sahrens const void *val, dmu_tx_t *tx) 1000fa9e4066Sahrens { 1001fa9e4066Sahrens zap_t *zap; 1002fa9e4066Sahrens int err; 1003fa9e4066Sahrens mzap_ent_t *mze; 1004fa9e4066Sahrens const uint64_t *intval = val; 1005da6c28aaSamw zap_name_t *zn; 1006fa9e4066Sahrens 1007c5f9e431Sahrens err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, &zap); 1008fa9e4066Sahrens if (err) 1009fa9e4066Sahrens return (err); 1010b24ab676SJeff Bonwick zn = zap_name_alloc(zap, key, MT_EXACT); 1011da6c28aaSamw if (zn == NULL) { 1012da6c28aaSamw zap_unlockdir(zap); 1013be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 1014da6c28aaSamw } 1015fa9e4066Sahrens if (!zap->zap_ismicro) { 1016da6c28aaSamw err = fzap_add(zn, integer_size, num_integers, val, tx); 1017ad860c82Sbonwick zap = zn->zn_zap; /* fzap_add() may change zap */ 1018fa9e4066Sahrens } else if (integer_size != 8 || num_integers != 1 || 1019b24ab676SJeff Bonwick strlen(key) >= MZAP_NAME_LEN) { 1020b24ab676SJeff Bonwick err = mzap_upgrade(&zn->zn_zap, tx, 0); 1021ad860c82Sbonwick if (err == 0) 1022ad860c82Sbonwick err = fzap_add(zn, integer_size, num_integers, val, tx); 1023ad860c82Sbonwick zap = zn->zn_zap; /* fzap_add() may change zap */ 1024fa9e4066Sahrens } else { 1025da6c28aaSamw mze = mze_find(zn); 1026fa9e4066Sahrens if (mze != NULL) { 1027be6fd75aSMatthew Ahrens err = SET_ERROR(EEXIST); 1028fa9e4066Sahrens } else { 1029da6c28aaSamw mzap_addent(zn, *intval); 1030fa9e4066Sahrens } 1031fa9e4066Sahrens } 1032ad860c82Sbonwick ASSERT(zap == zn->zn_zap); 1033da6c28aaSamw zap_name_free(zn); 1034ad860c82Sbonwick if (zap != NULL) /* may be NULL if fzap_add() failed */ 1035ad860c82Sbonwick zap_unlockdir(zap); 1036fa9e4066Sahrens return (err); 1037fa9e4066Sahrens } 1038fa9e4066Sahrens 1039b24ab676SJeff Bonwick int 1040b24ab676SJeff Bonwick zap_add_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, 1041b24ab676SJeff Bonwick int key_numints, int integer_size, uint64_t num_integers, 1042b24ab676SJeff Bonwick const void *val, dmu_tx_t *tx) 1043b24ab676SJeff Bonwick { 1044b24ab676SJeff Bonwick zap_t *zap; 1045b24ab676SJeff Bonwick int err; 1046b24ab676SJeff Bonwick zap_name_t *zn; 1047b24ab676SJeff Bonwick 1048b24ab676SJeff Bonwick err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, &zap); 1049b24ab676SJeff Bonwick if (err) 1050b24ab676SJeff Bonwick return (err); 1051b24ab676SJeff Bonwick zn = zap_name_alloc_uint64(zap, key, key_numints); 1052b24ab676SJeff Bonwick if (zn == NULL) { 1053b24ab676SJeff Bonwick zap_unlockdir(zap); 1054be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 1055b24ab676SJeff Bonwick } 1056b24ab676SJeff Bonwick err = fzap_add(zn, integer_size, num_integers, val, tx); 1057b24ab676SJeff Bonwick zap = zn->zn_zap; /* fzap_add() may change zap */ 1058b24ab676SJeff Bonwick zap_name_free(zn); 1059b24ab676SJeff Bonwick if (zap != NULL) /* may be NULL if fzap_add() failed */ 1060b24ab676SJeff Bonwick zap_unlockdir(zap); 1061b24ab676SJeff Bonwick return (err); 1062b24ab676SJeff Bonwick } 1063b24ab676SJeff Bonwick 1064fa9e4066Sahrens int 1065fa9e4066Sahrens zap_update(objset_t *os, uint64_t zapobj, const char *name, 1066fa9e4066Sahrens int integer_size, uint64_t num_integers, const void *val, dmu_tx_t *tx) 1067fa9e4066Sahrens { 1068fa9e4066Sahrens zap_t *zap; 1069fa9e4066Sahrens mzap_ent_t *mze; 10703f9d6ad7SLin Ling uint64_t oldval; 1071fa9e4066Sahrens const uint64_t *intval = val; 1072da6c28aaSamw zap_name_t *zn; 1073fa9e4066Sahrens int err; 1074fa9e4066Sahrens 10753f9d6ad7SLin Ling #ifdef ZFS_DEBUG 10763f9d6ad7SLin Ling /* 10773f9d6ad7SLin Ling * If there is an old value, it shouldn't change across the 10783f9d6ad7SLin Ling * lockdir (eg, due to bprewrite's xlation). 10793f9d6ad7SLin Ling */ 10803f9d6ad7SLin Ling if (integer_size == 8 && num_integers == 1) 10813f9d6ad7SLin Ling (void) zap_lookup(os, zapobj, name, 8, 1, &oldval); 10823f9d6ad7SLin Ling #endif 10833f9d6ad7SLin Ling 1084c5f9e431Sahrens err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, &zap); 1085fa9e4066Sahrens if (err) 1086fa9e4066Sahrens return (err); 1087da6c28aaSamw zn = zap_name_alloc(zap, name, MT_EXACT); 1088da6c28aaSamw if (zn == NULL) { 1089da6c28aaSamw zap_unlockdir(zap); 1090be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 1091da6c28aaSamw } 1092fa9e4066Sahrens if (!zap->zap_ismicro) { 1093da6c28aaSamw err = fzap_update(zn, integer_size, num_integers, val, tx); 1094ad860c82Sbonwick zap = zn->zn_zap; /* fzap_update() may change zap */ 1095fa9e4066Sahrens } else if (integer_size != 8 || num_integers != 1 || 1096fa9e4066Sahrens strlen(name) >= MZAP_NAME_LEN) { 1097fa9e4066Sahrens dprintf("upgrading obj %llu: intsz=%u numint=%llu name=%s\n", 1098fa9e4066Sahrens zapobj, integer_size, num_integers, name); 1099b24ab676SJeff Bonwick err = mzap_upgrade(&zn->zn_zap, tx, 0); 1100ad860c82Sbonwick if (err == 0) 1101ad860c82Sbonwick err = fzap_update(zn, integer_size, num_integers, 1102ad860c82Sbonwick val, tx); 1103ad860c82Sbonwick zap = zn->zn_zap; /* fzap_update() may change zap */ 1104fa9e4066Sahrens } else { 1105da6c28aaSamw mze = mze_find(zn); 1106fa9e4066Sahrens if (mze != NULL) { 11073f9d6ad7SLin Ling ASSERT3U(MZE_PHYS(zap, mze)->mze_value, ==, oldval); 11083f9d6ad7SLin Ling MZE_PHYS(zap, mze)->mze_value = *intval; 1109fa9e4066Sahrens } else { 1110da6c28aaSamw mzap_addent(zn, *intval); 1111fa9e4066Sahrens } 1112fa9e4066Sahrens } 1113ad860c82Sbonwick ASSERT(zap == zn->zn_zap); 1114da6c28aaSamw zap_name_free(zn); 1115ad860c82Sbonwick if (zap != NULL) /* may be NULL if fzap_upgrade() failed */ 1116ad860c82Sbonwick zap_unlockdir(zap); 1117455d5089Sahrens return (err); 1118fa9e4066Sahrens } 1119fa9e4066Sahrens 1120b24ab676SJeff Bonwick int 1121b24ab676SJeff Bonwick zap_update_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, 1122b24ab676SJeff Bonwick int key_numints, 1123b24ab676SJeff Bonwick int integer_size, uint64_t num_integers, const void *val, dmu_tx_t *tx) 1124b24ab676SJeff Bonwick { 1125b24ab676SJeff Bonwick zap_t *zap; 1126b24ab676SJeff Bonwick zap_name_t *zn; 1127b24ab676SJeff Bonwick int err; 1128b24ab676SJeff Bonwick 1129b24ab676SJeff Bonwick err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, &zap); 1130b24ab676SJeff Bonwick if (err) 1131b24ab676SJeff Bonwick return (err); 1132b24ab676SJeff Bonwick zn = zap_name_alloc_uint64(zap, key, key_numints); 1133b24ab676SJeff Bonwick if (zn == NULL) { 1134b24ab676SJeff Bonwick zap_unlockdir(zap); 1135be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 1136b24ab676SJeff Bonwick } 1137b24ab676SJeff Bonwick err = fzap_update(zn, integer_size, num_integers, val, tx); 1138b24ab676SJeff Bonwick zap = zn->zn_zap; /* fzap_update() may change zap */ 1139b24ab676SJeff Bonwick zap_name_free(zn); 1140b24ab676SJeff Bonwick if (zap != NULL) /* may be NULL if fzap_upgrade() failed */ 1141b24ab676SJeff Bonwick zap_unlockdir(zap); 1142b24ab676SJeff Bonwick return (err); 1143b24ab676SJeff Bonwick } 1144b24ab676SJeff Bonwick 1145fa9e4066Sahrens int 1146fa9e4066Sahrens zap_remove(objset_t *os, uint64_t zapobj, const char *name, dmu_tx_t *tx) 1147da6c28aaSamw { 1148da6c28aaSamw return (zap_remove_norm(os, zapobj, name, MT_EXACT, tx)); 1149da6c28aaSamw } 1150da6c28aaSamw 1151da6c28aaSamw int 1152da6c28aaSamw zap_remove_norm(objset_t *os, uint64_t zapobj, const char *name, 1153da6c28aaSamw matchtype_t mt, dmu_tx_t *tx) 1154fa9e4066Sahrens { 1155fa9e4066Sahrens zap_t *zap; 1156fa9e4066Sahrens int err; 1157fa9e4066Sahrens mzap_ent_t *mze; 1158da6c28aaSamw zap_name_t *zn; 1159fa9e4066Sahrens 1160c5f9e431Sahrens err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, FALSE, &zap); 1161fa9e4066Sahrens if (err) 1162fa9e4066Sahrens return (err); 1163da6c28aaSamw zn = zap_name_alloc(zap, name, mt); 1164da6c28aaSamw if (zn == NULL) { 1165da6c28aaSamw zap_unlockdir(zap); 1166be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 1167da6c28aaSamw } 1168fa9e4066Sahrens if (!zap->zap_ismicro) { 1169da6c28aaSamw err = fzap_remove(zn, tx); 1170fa9e4066Sahrens } else { 1171da6c28aaSamw mze = mze_find(zn); 1172fa9e4066Sahrens if (mze == NULL) { 1173be6fd75aSMatthew Ahrens err = SET_ERROR(ENOENT); 1174fa9e4066Sahrens } else { 1175fa9e4066Sahrens zap->zap_m.zap_num_entries--; 1176c1379625SJustin T. Gibbs bzero(&zap_m_phys(zap)->mz_chunk[mze->mze_chunkid], 1177fa9e4066Sahrens sizeof (mzap_ent_phys_t)); 1178fa9e4066Sahrens mze_remove(zap, mze); 1179fa9e4066Sahrens } 1180fa9e4066Sahrens } 1181da6c28aaSamw zap_name_free(zn); 1182fa9e4066Sahrens zap_unlockdir(zap); 1183fa9e4066Sahrens return (err); 1184fa9e4066Sahrens } 1185fa9e4066Sahrens 1186b24ab676SJeff Bonwick int 1187b24ab676SJeff Bonwick zap_remove_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, 1188b24ab676SJeff Bonwick int key_numints, dmu_tx_t *tx) 1189b24ab676SJeff Bonwick { 1190b24ab676SJeff Bonwick zap_t *zap; 1191b24ab676SJeff Bonwick int err; 1192b24ab676SJeff Bonwick zap_name_t *zn; 1193b24ab676SJeff Bonwick 1194b24ab676SJeff Bonwick err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, FALSE, &zap); 1195b24ab676SJeff Bonwick if (err) 1196b24ab676SJeff Bonwick return (err); 1197b24ab676SJeff Bonwick zn = zap_name_alloc_uint64(zap, key, key_numints); 1198b24ab676SJeff Bonwick if (zn == NULL) { 1199b24ab676SJeff Bonwick zap_unlockdir(zap); 1200be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 1201b24ab676SJeff Bonwick } 1202b24ab676SJeff Bonwick err = fzap_remove(zn, tx); 1203b24ab676SJeff Bonwick zap_name_free(zn); 1204b24ab676SJeff Bonwick zap_unlockdir(zap); 1205b24ab676SJeff Bonwick return (err); 1206b24ab676SJeff Bonwick } 1207b24ab676SJeff Bonwick 1208fa9e4066Sahrens /* 1209fa9e4066Sahrens * Routines for iterating over the attributes. 1210fa9e4066Sahrens */ 1211fa9e4066Sahrens 1212fa9e4066Sahrens void 1213fa9e4066Sahrens zap_cursor_init_serialized(zap_cursor_t *zc, objset_t *os, uint64_t zapobj, 1214fa9e4066Sahrens uint64_t serialized) 1215fa9e4066Sahrens { 1216fa9e4066Sahrens zc->zc_objset = os; 121787e5029aSahrens zc->zc_zap = NULL; 121887e5029aSahrens zc->zc_leaf = NULL; 1219fa9e4066Sahrens zc->zc_zapobj = zapobj; 1220b24ab676SJeff Bonwick zc->zc_serialized = serialized; 1221b24ab676SJeff Bonwick zc->zc_hash = 0; 1222b24ab676SJeff Bonwick zc->zc_cd = 0; 1223fa9e4066Sahrens } 1224fa9e4066Sahrens 122587e5029aSahrens void 122687e5029aSahrens zap_cursor_init(zap_cursor_t *zc, objset_t *os, uint64_t zapobj) 122787e5029aSahrens { 122887e5029aSahrens zap_cursor_init_serialized(zc, os, zapobj, 0); 122987e5029aSahrens } 123087e5029aSahrens 123187e5029aSahrens void 123287e5029aSahrens zap_cursor_fini(zap_cursor_t *zc) 123387e5029aSahrens { 123487e5029aSahrens if (zc->zc_zap) { 123587e5029aSahrens rw_enter(&zc->zc_zap->zap_rwlock, RW_READER); 123687e5029aSahrens zap_unlockdir(zc->zc_zap); 123787e5029aSahrens zc->zc_zap = NULL; 123887e5029aSahrens } 123987e5029aSahrens if (zc->zc_leaf) { 124087e5029aSahrens rw_enter(&zc->zc_leaf->l_rwlock, RW_READER); 124187e5029aSahrens zap_put_leaf(zc->zc_leaf); 124287e5029aSahrens zc->zc_leaf = NULL; 124387e5029aSahrens } 124487e5029aSahrens zc->zc_objset = NULL; 124587e5029aSahrens } 124687e5029aSahrens 1247fa9e4066Sahrens uint64_t 1248fa9e4066Sahrens zap_cursor_serialize(zap_cursor_t *zc) 1249fa9e4066Sahrens { 1250fa9e4066Sahrens if (zc->zc_hash == -1ULL) 1251fa9e4066Sahrens return (-1ULL); 1252b24ab676SJeff Bonwick if (zc->zc_zap == NULL) 1253b24ab676SJeff Bonwick return (zc->zc_serialized); 1254b24ab676SJeff Bonwick ASSERT((zc->zc_hash & zap_maxcd(zc->zc_zap)) == 0); 1255b24ab676SJeff Bonwick ASSERT(zc->zc_cd < zap_maxcd(zc->zc_zap)); 1256b24ab676SJeff Bonwick 1257b24ab676SJeff Bonwick /* 1258b24ab676SJeff Bonwick * We want to keep the high 32 bits of the cursor zero if we can, so 1259b24ab676SJeff Bonwick * that 32-bit programs can access this. So usually use a small 1260b24ab676SJeff Bonwick * (28-bit) hash value so we can fit 4 bits of cd into the low 32-bits 1261b24ab676SJeff Bonwick * of the cursor. 1262b24ab676SJeff Bonwick * 1263b24ab676SJeff Bonwick * [ collision differentiator | zap_hashbits()-bit hash value ] 1264b24ab676SJeff Bonwick */ 1265b24ab676SJeff Bonwick return ((zc->zc_hash >> (64 - zap_hashbits(zc->zc_zap))) | 1266b24ab676SJeff Bonwick ((uint64_t)zc->zc_cd << zap_hashbits(zc->zc_zap))); 1267fa9e4066Sahrens } 1268fa9e4066Sahrens 1269fa9e4066Sahrens int 1270fa9e4066Sahrens zap_cursor_retrieve(zap_cursor_t *zc, zap_attribute_t *za) 1271fa9e4066Sahrens { 1272fa9e4066Sahrens int err; 1273fa9e4066Sahrens avl_index_t idx; 1274fa9e4066Sahrens mzap_ent_t mze_tofind; 1275fa9e4066Sahrens mzap_ent_t *mze; 1276fa9e4066Sahrens 1277fa9e4066Sahrens if (zc->zc_hash == -1ULL) 1278be6fd75aSMatthew Ahrens return (SET_ERROR(ENOENT)); 1279fa9e4066Sahrens 128087e5029aSahrens if (zc->zc_zap == NULL) { 1281b24ab676SJeff Bonwick int hb; 128287e5029aSahrens err = zap_lockdir(zc->zc_objset, zc->zc_zapobj, NULL, 1283c5f9e431Sahrens RW_READER, TRUE, FALSE, &zc->zc_zap); 128487e5029aSahrens if (err) 128587e5029aSahrens return (err); 1286b24ab676SJeff Bonwick 1287b24ab676SJeff Bonwick /* 1288b24ab676SJeff Bonwick * To support zap_cursor_init_serialized, advance, retrieve, 1289b24ab676SJeff Bonwick * we must add to the existing zc_cd, which may already 1290b24ab676SJeff Bonwick * be 1 due to the zap_cursor_advance. 1291b24ab676SJeff Bonwick */ 1292b24ab676SJeff Bonwick ASSERT(zc->zc_hash == 0); 1293b24ab676SJeff Bonwick hb = zap_hashbits(zc->zc_zap); 1294b24ab676SJeff Bonwick zc->zc_hash = zc->zc_serialized << (64 - hb); 1295b24ab676SJeff Bonwick zc->zc_cd += zc->zc_serialized >> hb; 1296b24ab676SJeff Bonwick if (zc->zc_cd >= zap_maxcd(zc->zc_zap)) /* corrupt serialized */ 1297b24ab676SJeff Bonwick zc->zc_cd = 0; 129887e5029aSahrens } else { 129987e5029aSahrens rw_enter(&zc->zc_zap->zap_rwlock, RW_READER); 130087e5029aSahrens } 130187e5029aSahrens if (!zc->zc_zap->zap_ismicro) { 130287e5029aSahrens err = fzap_cursor_retrieve(zc->zc_zap, zc, za); 1303fa9e4066Sahrens } else { 1304fa9e4066Sahrens mze_tofind.mze_hash = zc->zc_hash; 13053f9d6ad7SLin Ling mze_tofind.mze_cd = zc->zc_cd; 1306fa9e4066Sahrens 130787e5029aSahrens mze = avl_find(&zc->zc_zap->zap_m.zap_avl, &mze_tofind, &idx); 130887e5029aSahrens if (mze == NULL) { 130987e5029aSahrens mze = avl_nearest(&zc->zc_zap->zap_m.zap_avl, 131087e5029aSahrens idx, AVL_AFTER); 131187e5029aSahrens } 1312fa9e4066Sahrens if (mze) { 13133f9d6ad7SLin Ling mzap_ent_phys_t *mzep = MZE_PHYS(zc->zc_zap, mze); 13143f9d6ad7SLin Ling ASSERT3U(mze->mze_cd, ==, mzep->mze_cd); 1315da6c28aaSamw za->za_normalization_conflict = 1316da6c28aaSamw mzap_normalization_conflict(zc->zc_zap, NULL, mze); 1317fa9e4066Sahrens za->za_integer_length = 8; 1318fa9e4066Sahrens za->za_num_integers = 1; 13193f9d6ad7SLin Ling za->za_first_integer = mzep->mze_value; 13203f9d6ad7SLin Ling (void) strcpy(za->za_name, mzep->mze_name); 1321fa9e4066Sahrens zc->zc_hash = mze->mze_hash; 13223f9d6ad7SLin Ling zc->zc_cd = mze->mze_cd; 1323fa9e4066Sahrens err = 0; 1324fa9e4066Sahrens } else { 1325fa9e4066Sahrens zc->zc_hash = -1ULL; 1326be6fd75aSMatthew Ahrens err = SET_ERROR(ENOENT); 1327fa9e4066Sahrens } 1328fa9e4066Sahrens } 132987e5029aSahrens rw_exit(&zc->zc_zap->zap_rwlock); 1330fa9e4066Sahrens return (err); 1331fa9e4066Sahrens } 1332fa9e4066Sahrens 1333fa9e4066Sahrens void 1334fa9e4066Sahrens zap_cursor_advance(zap_cursor_t *zc) 1335fa9e4066Sahrens { 1336fa9e4066Sahrens if (zc->zc_hash == -1ULL) 1337fa9e4066Sahrens return; 1338fa9e4066Sahrens zc->zc_cd++; 1339fa9e4066Sahrens } 1340fa9e4066Sahrens 1341fa9e4066Sahrens int 1342fa9e4066Sahrens zap_get_stats(objset_t *os, uint64_t zapobj, zap_stats_t *zs) 1343fa9e4066Sahrens { 1344fa9e4066Sahrens int err; 1345fa9e4066Sahrens zap_t *zap; 1346fa9e4066Sahrens 1347c5f9e431Sahrens err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); 1348fa9e4066Sahrens if (err) 1349fa9e4066Sahrens return (err); 1350fa9e4066Sahrens 1351fa9e4066Sahrens bzero(zs, sizeof (zap_stats_t)); 1352fa9e4066Sahrens 1353fa9e4066Sahrens if (zap->zap_ismicro) { 1354fa9e4066Sahrens zs->zs_blocksize = zap->zap_dbuf->db_size; 1355fa9e4066Sahrens zs->zs_num_entries = zap->zap_m.zap_num_entries; 1356fa9e4066Sahrens zs->zs_num_blocks = 1; 1357fa9e4066Sahrens } else { 1358fa9e4066Sahrens fzap_get_stats(zap, zs); 1359fa9e4066Sahrens } 1360fa9e4066Sahrens zap_unlockdir(zap); 1361fa9e4066Sahrens return (0); 1362fa9e4066Sahrens } 13633d692628SSanjeev Bagewadi 13643d692628SSanjeev Bagewadi int 13653d692628SSanjeev Bagewadi zap_count_write(objset_t *os, uint64_t zapobj, const char *name, int add, 1366720d1aa1SSanjeev Bagewadi uint64_t *towrite, uint64_t *tooverwrite) 13673d692628SSanjeev Bagewadi { 13683d692628SSanjeev Bagewadi zap_t *zap; 13693d692628SSanjeev Bagewadi int err = 0; 13703d692628SSanjeev Bagewadi 13713d692628SSanjeev Bagewadi /* 13723d692628SSanjeev Bagewadi * Since, we don't have a name, we cannot figure out which blocks will 13733d692628SSanjeev Bagewadi * be affected in this operation. So, account for the worst case : 13743d692628SSanjeev Bagewadi * - 3 blocks overwritten: target leaf, ptrtbl block, header block 13753d692628SSanjeev Bagewadi * - 4 new blocks written if adding: 13763d692628SSanjeev Bagewadi * - 2 blocks for possibly split leaves, 13773d692628SSanjeev Bagewadi * - 2 grown ptrtbl blocks 13783d692628SSanjeev Bagewadi * 13793d692628SSanjeev Bagewadi * This also accomodates the case where an add operation to a fairly 13803d692628SSanjeev Bagewadi * large microzap results in a promotion to fatzap. 13813d692628SSanjeev Bagewadi */ 13823d692628SSanjeev Bagewadi if (name == NULL) { 1383b5152584SMatthew Ahrens *towrite += (3 + (add ? 4 : 0)) * SPA_OLD_MAXBLOCKSIZE; 13843d692628SSanjeev Bagewadi return (err); 13853d692628SSanjeev Bagewadi } 13863d692628SSanjeev Bagewadi 13873d692628SSanjeev Bagewadi /* 138819b94df9SMatthew Ahrens * We lock the zap with adding == FALSE. Because, if we pass 13893d692628SSanjeev Bagewadi * the actual value of add, it could trigger a mzap_upgrade(). 13903d692628SSanjeev Bagewadi * At present we are just evaluating the possibility of this operation 13913d692628SSanjeev Bagewadi * and hence we donot want to trigger an upgrade. 13923d692628SSanjeev Bagewadi */ 13933d692628SSanjeev Bagewadi err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); 13943d692628SSanjeev Bagewadi if (err) 13953d692628SSanjeev Bagewadi return (err); 13963d692628SSanjeev Bagewadi 13973d692628SSanjeev Bagewadi if (!zap->zap_ismicro) { 13983d692628SSanjeev Bagewadi zap_name_t *zn = zap_name_alloc(zap, name, MT_EXACT); 13993d692628SSanjeev Bagewadi if (zn) { 14003d692628SSanjeev Bagewadi err = fzap_count_write(zn, add, towrite, 14013d692628SSanjeev Bagewadi tooverwrite); 14023d692628SSanjeev Bagewadi zap_name_free(zn); 14033d692628SSanjeev Bagewadi } else { 14043d692628SSanjeev Bagewadi /* 14053d692628SSanjeev Bagewadi * We treat this case as similar to (name == NULL) 14063d692628SSanjeev Bagewadi */ 1407b5152584SMatthew Ahrens *towrite += (3 + (add ? 4 : 0)) * SPA_OLD_MAXBLOCKSIZE; 14083d692628SSanjeev Bagewadi } 14093d692628SSanjeev Bagewadi } else { 1410720d1aa1SSanjeev Bagewadi /* 1411720d1aa1SSanjeev Bagewadi * We are here if (name != NULL) and this is a micro-zap. 1412720d1aa1SSanjeev Bagewadi * We account for the header block depending on whether it 1413720d1aa1SSanjeev Bagewadi * is freeable. 1414720d1aa1SSanjeev Bagewadi * 1415720d1aa1SSanjeev Bagewadi * Incase of an add-operation it is hard to find out 1416720d1aa1SSanjeev Bagewadi * if this add will promote this microzap to fatzap. 1417720d1aa1SSanjeev Bagewadi * Hence, we consider the worst case and account for the 1418720d1aa1SSanjeev Bagewadi * blocks assuming this microzap would be promoted to a 1419720d1aa1SSanjeev Bagewadi * fatzap. 1420720d1aa1SSanjeev Bagewadi * 1421720d1aa1SSanjeev Bagewadi * 1 block overwritten : header block 1422720d1aa1SSanjeev Bagewadi * 4 new blocks written : 2 new split leaf, 2 grown 1423720d1aa1SSanjeev Bagewadi * ptrtbl blocks 1424720d1aa1SSanjeev Bagewadi */ 1425720d1aa1SSanjeev Bagewadi if (dmu_buf_freeable(zap->zap_dbuf)) 1426b5152584SMatthew Ahrens *tooverwrite += MZAP_MAX_BLKSZ; 1427720d1aa1SSanjeev Bagewadi else 1428b5152584SMatthew Ahrens *towrite += MZAP_MAX_BLKSZ; 1429720d1aa1SSanjeev Bagewadi 1430720d1aa1SSanjeev Bagewadi if (add) { 1431b5152584SMatthew Ahrens *towrite += 4 * MZAP_MAX_BLKSZ; 14323d692628SSanjeev Bagewadi } 14333d692628SSanjeev Bagewadi } 14343d692628SSanjeev Bagewadi 14353d692628SSanjeev Bagewadi zap_unlockdir(zap); 14363d692628SSanjeev Bagewadi return (err); 14373d692628SSanjeev Bagewadi } 1438