zap_micro.c revision 286556
1168404Spjd/* 2168404Spjd * CDDL HEADER START 3168404Spjd * 4168404Spjd * The contents of this file are subject to the terms of the 5168404Spjd * Common Development and Distribution License (the "License"). 6168404Spjd * You may not use this file except in compliance with the License. 7168404Spjd * 8168404Spjd * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9168404Spjd * or http://www.opensolaris.org/os/licensing. 10168404Spjd * See the License for the specific language governing permissions 11168404Spjd * and limitations under the License. 12168404Spjd * 13168404Spjd * When distributing Covered Code, include this CDDL HEADER in each 14168404Spjd * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15168404Spjd * If applicable, add the following below this CDDL HEADER, with the 16168404Spjd * fields enclosed by brackets "[]" replaced with your own identifying 17168404Spjd * information: Portions Copyright [yyyy] [name of copyright owner] 18168404Spjd * 19168404Spjd * CDDL HEADER END 20168404Spjd */ 21168404Spjd/* 22219089Spjd * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 23264669Sdelphij * Copyright (c) 2011, 2014 by Delphix. All rights reserved. 24168404Spjd */ 25168404Spjd 26219089Spjd#include <sys/zio.h> 27168404Spjd#include <sys/spa.h> 28168404Spjd#include <sys/dmu.h> 29168404Spjd#include <sys/zfs_context.h> 30168404Spjd#include <sys/zap.h> 31168404Spjd#include <sys/refcount.h> 32168404Spjd#include <sys/zap_impl.h> 33168404Spjd#include <sys/zap_leaf.h> 34168404Spjd#include <sys/avl.h> 35219089Spjd#include <sys/arc.h> 36274337Sdelphij#include <sys/dmu_objset.h> 37168404Spjd 38185029Spjd#ifdef _KERNEL 39185029Spjd#include <sys/sunddi.h> 40185029Spjd#endif 41168404Spjd 42275782Sdelphijextern inline mzap_phys_t *zap_m_phys(zap_t *zap); 43275782Sdelphij 44219089Spjdstatic int mzap_upgrade(zap_t **zapp, dmu_tx_t *tx, zap_flags_t flags); 45168404Spjd 46219089Spjduint64_t 47219089Spjdzap_getflags(zap_t *zap) 48219089Spjd{ 49219089Spjd if (zap->zap_ismicro) 50219089Spjd return (0); 51275782Sdelphij return (zap_f_phys(zap)->zap_flags); 52219089Spjd} 53168404Spjd 54219089Spjdint 55219089Spjdzap_hashbits(zap_t *zap) 56219089Spjd{ 57219089Spjd if (zap_getflags(zap) & ZAP_FLAG_HASH64) 58219089Spjd return (48); 59219089Spjd else 60219089Spjd return (28); 61219089Spjd} 62219089Spjd 63219089Spjduint32_t 64219089Spjdzap_maxcd(zap_t *zap) 65219089Spjd{ 66219089Spjd if (zap_getflags(zap) & ZAP_FLAG_HASH64) 67219089Spjd return ((1<<16)-1); 68219089Spjd else 69219089Spjd return (-1U); 70219089Spjd} 71219089Spjd 72185029Spjdstatic uint64_t 73219089Spjdzap_hash(zap_name_t *zn) 74185029Spjd{ 75219089Spjd zap_t *zap = zn->zn_zap; 76219089Spjd uint64_t h = 0; 77185029Spjd 78219089Spjd if (zap_getflags(zap) & ZAP_FLAG_PRE_HASHED_KEY) { 79219089Spjd ASSERT(zap_getflags(zap) & ZAP_FLAG_UINT64_KEY); 80219089Spjd h = *(uint64_t *)zn->zn_key_orig; 81219089Spjd } else { 82219089Spjd h = zap->zap_salt; 83219089Spjd ASSERT(h != 0); 84219089Spjd ASSERT(zfs_crc64_table[128] == ZFS_CRC64_POLY); 85185029Spjd 86219089Spjd if (zap_getflags(zap) & ZAP_FLAG_UINT64_KEY) { 87219089Spjd int i; 88219089Spjd const uint64_t *wp = zn->zn_key_norm; 89219089Spjd 90219089Spjd ASSERT(zn->zn_key_intlen == 8); 91219089Spjd for (i = 0; i < zn->zn_key_norm_numints; wp++, i++) { 92219089Spjd int j; 93219089Spjd uint64_t word = *wp; 94219089Spjd 95219089Spjd for (j = 0; j < zn->zn_key_intlen; j++) { 96219089Spjd h = (h >> 8) ^ 97219089Spjd zfs_crc64_table[(h ^ word) & 0xFF]; 98219089Spjd word >>= NBBY; 99219089Spjd } 100219089Spjd } 101219089Spjd } else { 102219089Spjd int i, len; 103219089Spjd const uint8_t *cp = zn->zn_key_norm; 104219089Spjd 105219089Spjd /* 106219089Spjd * We previously stored the terminating null on 107219089Spjd * disk, but didn't hash it, so we need to 108219089Spjd * continue to not hash it. (The 109219089Spjd * zn_key_*_numints includes the terminating 110219089Spjd * null for non-binary keys.) 111219089Spjd */ 112219089Spjd len = zn->zn_key_norm_numints - 1; 113219089Spjd 114219089Spjd ASSERT(zn->zn_key_intlen == 1); 115219089Spjd for (i = 0; i < len; cp++, i++) { 116219089Spjd h = (h >> 8) ^ 117219089Spjd zfs_crc64_table[(h ^ *cp) & 0xFF]; 118219089Spjd } 119219089Spjd } 120185029Spjd } 121185029Spjd /* 122219089Spjd * Don't use all 64 bits, since we need some in the cookie for 123219089Spjd * the collision differentiator. We MUST use the high bits, 124219089Spjd * since those are the ones that we first pay attention to when 125185029Spjd * chosing the bucket. 126185029Spjd */ 127219089Spjd h &= ~((1ULL << (64 - zap_hashbits(zap))) - 1); 128185029Spjd 129219089Spjd return (h); 130185029Spjd} 131185029Spjd 132185029Spjdstatic int 133185029Spjdzap_normalize(zap_t *zap, const char *name, char *namenorm) 134185029Spjd{ 135185029Spjd size_t inlen, outlen; 136185029Spjd int err; 137185029Spjd 138219089Spjd ASSERT(!(zap_getflags(zap) & ZAP_FLAG_UINT64_KEY)); 139219089Spjd 140185029Spjd inlen = strlen(name) + 1; 141185029Spjd outlen = ZAP_MAXNAMELEN; 142185029Spjd 143185029Spjd err = 0; 144185029Spjd (void) u8_textprep_str((char *)name, &inlen, namenorm, &outlen, 145219089Spjd zap->zap_normflags | U8_TEXTPREP_IGNORE_NULL | 146219089Spjd U8_TEXTPREP_IGNORE_INVALID, U8_UNICODE_LATEST, &err); 147185029Spjd 148185029Spjd return (err); 149185029Spjd} 150185029Spjd 151185029Spjdboolean_t 152185029Spjdzap_match(zap_name_t *zn, const char *matchname) 153185029Spjd{ 154219089Spjd ASSERT(!(zap_getflags(zn->zn_zap) & ZAP_FLAG_UINT64_KEY)); 155219089Spjd 156185029Spjd if (zn->zn_matchtype == MT_FIRST) { 157185029Spjd char norm[ZAP_MAXNAMELEN]; 158185029Spjd 159185029Spjd if (zap_normalize(zn->zn_zap, matchname, norm) != 0) 160185029Spjd return (B_FALSE); 161185029Spjd 162219089Spjd return (strcmp(zn->zn_key_norm, norm) == 0); 163185029Spjd } else { 164185029Spjd /* MT_BEST or MT_EXACT */ 165219089Spjd return (strcmp(zn->zn_key_orig, matchname) == 0); 166185029Spjd } 167185029Spjd} 168185029Spjd 169185029Spjdvoid 170185029Spjdzap_name_free(zap_name_t *zn) 171185029Spjd{ 172185029Spjd kmem_free(zn, sizeof (zap_name_t)); 173185029Spjd} 174185029Spjd 175185029Spjdzap_name_t * 176219089Spjdzap_name_alloc(zap_t *zap, const char *key, matchtype_t mt) 177185029Spjd{ 178185029Spjd zap_name_t *zn = kmem_alloc(sizeof (zap_name_t), KM_SLEEP); 179185029Spjd 180185029Spjd zn->zn_zap = zap; 181219089Spjd zn->zn_key_intlen = sizeof (*key); 182219089Spjd zn->zn_key_orig = key; 183219089Spjd zn->zn_key_orig_numints = strlen(zn->zn_key_orig) + 1; 184185029Spjd zn->zn_matchtype = mt; 185185029Spjd if (zap->zap_normflags) { 186219089Spjd if (zap_normalize(zap, key, zn->zn_normbuf) != 0) { 187185029Spjd zap_name_free(zn); 188185029Spjd return (NULL); 189185029Spjd } 190219089Spjd zn->zn_key_norm = zn->zn_normbuf; 191219089Spjd zn->zn_key_norm_numints = strlen(zn->zn_key_norm) + 1; 192185029Spjd } else { 193185029Spjd if (mt != MT_EXACT) { 194185029Spjd zap_name_free(zn); 195185029Spjd return (NULL); 196185029Spjd } 197219089Spjd zn->zn_key_norm = zn->zn_key_orig; 198219089Spjd zn->zn_key_norm_numints = zn->zn_key_orig_numints; 199185029Spjd } 200185029Spjd 201219089Spjd zn->zn_hash = zap_hash(zn); 202185029Spjd return (zn); 203185029Spjd} 204185029Spjd 205219089Spjdzap_name_t * 206219089Spjdzap_name_alloc_uint64(zap_t *zap, const uint64_t *key, int numints) 207219089Spjd{ 208219089Spjd zap_name_t *zn = kmem_alloc(sizeof (zap_name_t), KM_SLEEP); 209219089Spjd 210219089Spjd ASSERT(zap->zap_normflags == 0); 211219089Spjd zn->zn_zap = zap; 212219089Spjd zn->zn_key_intlen = sizeof (*key); 213219089Spjd zn->zn_key_orig = zn->zn_key_norm = key; 214219089Spjd zn->zn_key_orig_numints = zn->zn_key_norm_numints = numints; 215219089Spjd zn->zn_matchtype = MT_EXACT; 216219089Spjd 217219089Spjd zn->zn_hash = zap_hash(zn); 218219089Spjd return (zn); 219219089Spjd} 220219089Spjd 221168404Spjdstatic void 222168404Spjdmzap_byteswap(mzap_phys_t *buf, size_t size) 223168404Spjd{ 224168404Spjd int i, max; 225168404Spjd buf->mz_block_type = BSWAP_64(buf->mz_block_type); 226168404Spjd buf->mz_salt = BSWAP_64(buf->mz_salt); 227185029Spjd buf->mz_normflags = BSWAP_64(buf->mz_normflags); 228168404Spjd max = (size / MZAP_ENT_LEN) - 1; 229168404Spjd for (i = 0; i < max; i++) { 230168404Spjd buf->mz_chunk[i].mze_value = 231168404Spjd BSWAP_64(buf->mz_chunk[i].mze_value); 232168404Spjd buf->mz_chunk[i].mze_cd = 233168404Spjd BSWAP_32(buf->mz_chunk[i].mze_cd); 234168404Spjd } 235168404Spjd} 236168404Spjd 237168404Spjdvoid 238168404Spjdzap_byteswap(void *buf, size_t size) 239168404Spjd{ 240168404Spjd uint64_t block_type; 241168404Spjd 242168404Spjd block_type = *(uint64_t *)buf; 243168404Spjd 244168404Spjd if (block_type == ZBT_MICRO || block_type == BSWAP_64(ZBT_MICRO)) { 245168404Spjd /* ASSERT(magic == ZAP_LEAF_MAGIC); */ 246168404Spjd mzap_byteswap(buf, size); 247168404Spjd } else { 248168404Spjd fzap_byteswap(buf, size); 249168404Spjd } 250168404Spjd} 251168404Spjd 252168404Spjdstatic int 253168404Spjdmze_compare(const void *arg1, const void *arg2) 254168404Spjd{ 255168404Spjd const mzap_ent_t *mze1 = arg1; 256168404Spjd const mzap_ent_t *mze2 = arg2; 257168404Spjd 258168404Spjd if (mze1->mze_hash > mze2->mze_hash) 259168404Spjd return (+1); 260168404Spjd if (mze1->mze_hash < mze2->mze_hash) 261168404Spjd return (-1); 262219089Spjd if (mze1->mze_cd > mze2->mze_cd) 263168404Spjd return (+1); 264219089Spjd if (mze1->mze_cd < mze2->mze_cd) 265168404Spjd return (-1); 266168404Spjd return (0); 267168404Spjd} 268168404Spjd 269197150Spjdstatic int 270219089Spjdmze_insert(zap_t *zap, int chunkid, uint64_t hash) 271168404Spjd{ 272168404Spjd mzap_ent_t *mze; 273197150Spjd avl_index_t idx; 274168404Spjd 275168404Spjd ASSERT(zap->zap_ismicro); 276168404Spjd ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 277168404Spjd 278168404Spjd mze = kmem_alloc(sizeof (mzap_ent_t), KM_SLEEP); 279168404Spjd mze->mze_chunkid = chunkid; 280168404Spjd mze->mze_hash = hash; 281219089Spjd mze->mze_cd = MZE_PHYS(zap, mze)->mze_cd; 282219089Spjd ASSERT(MZE_PHYS(zap, mze)->mze_name[0] != 0); 283197150Spjd if (avl_find(&zap->zap_m.zap_avl, mze, &idx) != NULL) { 284197150Spjd kmem_free(mze, sizeof (mzap_ent_t)); 285197150Spjd return (EEXIST); 286197150Spjd } 287197150Spjd avl_insert(&zap->zap_m.zap_avl, mze, idx); 288197150Spjd return (0); 289168404Spjd} 290168404Spjd 291168404Spjdstatic mzap_ent_t * 292185029Spjdmze_find(zap_name_t *zn) 293168404Spjd{ 294168404Spjd mzap_ent_t mze_tofind; 295168404Spjd mzap_ent_t *mze; 296168404Spjd avl_index_t idx; 297185029Spjd avl_tree_t *avl = &zn->zn_zap->zap_m.zap_avl; 298168404Spjd 299185029Spjd ASSERT(zn->zn_zap->zap_ismicro); 300185029Spjd ASSERT(RW_LOCK_HELD(&zn->zn_zap->zap_rwlock)); 301168404Spjd 302185029Spjd mze_tofind.mze_hash = zn->zn_hash; 303219089Spjd mze_tofind.mze_cd = 0; 304168404Spjd 305185029Spjdagain: 306168404Spjd mze = avl_find(avl, &mze_tofind, &idx); 307168404Spjd if (mze == NULL) 308168404Spjd mze = avl_nearest(avl, idx, AVL_AFTER); 309185029Spjd for (; mze && mze->mze_hash == zn->zn_hash; mze = AVL_NEXT(avl, mze)) { 310219089Spjd ASSERT3U(mze->mze_cd, ==, MZE_PHYS(zn->zn_zap, mze)->mze_cd); 311219089Spjd if (zap_match(zn, MZE_PHYS(zn->zn_zap, mze)->mze_name)) 312168404Spjd return (mze); 313168404Spjd } 314185029Spjd if (zn->zn_matchtype == MT_BEST) { 315185029Spjd zn->zn_matchtype = MT_FIRST; 316185029Spjd goto again; 317185029Spjd } 318168404Spjd return (NULL); 319168404Spjd} 320168404Spjd 321168404Spjdstatic uint32_t 322168404Spjdmze_find_unused_cd(zap_t *zap, uint64_t hash) 323168404Spjd{ 324168404Spjd mzap_ent_t mze_tofind; 325168404Spjd mzap_ent_t *mze; 326168404Spjd avl_index_t idx; 327168404Spjd avl_tree_t *avl = &zap->zap_m.zap_avl; 328168404Spjd uint32_t cd; 329168404Spjd 330168404Spjd ASSERT(zap->zap_ismicro); 331168404Spjd ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 332168404Spjd 333168404Spjd mze_tofind.mze_hash = hash; 334219089Spjd mze_tofind.mze_cd = 0; 335168404Spjd 336168404Spjd cd = 0; 337168404Spjd for (mze = avl_find(avl, &mze_tofind, &idx); 338168404Spjd mze && mze->mze_hash == hash; mze = AVL_NEXT(avl, mze)) { 339219089Spjd if (mze->mze_cd != cd) 340168404Spjd break; 341168404Spjd cd++; 342168404Spjd } 343168404Spjd 344168404Spjd return (cd); 345168404Spjd} 346168404Spjd 347168404Spjdstatic void 348168404Spjdmze_remove(zap_t *zap, mzap_ent_t *mze) 349168404Spjd{ 350168404Spjd ASSERT(zap->zap_ismicro); 351168404Spjd ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 352168404Spjd 353168404Spjd avl_remove(&zap->zap_m.zap_avl, mze); 354168404Spjd kmem_free(mze, sizeof (mzap_ent_t)); 355168404Spjd} 356168404Spjd 357168404Spjdstatic void 358168404Spjdmze_destroy(zap_t *zap) 359168404Spjd{ 360168404Spjd mzap_ent_t *mze; 361168404Spjd void *avlcookie = NULL; 362168404Spjd 363168404Spjd while (mze = avl_destroy_nodes(&zap->zap_m.zap_avl, &avlcookie)) 364168404Spjd kmem_free(mze, sizeof (mzap_ent_t)); 365168404Spjd avl_destroy(&zap->zap_m.zap_avl); 366168404Spjd} 367168404Spjd 368168404Spjdstatic zap_t * 369168404Spjdmzap_open(objset_t *os, uint64_t obj, dmu_buf_t *db) 370168404Spjd{ 371168404Spjd zap_t *winner; 372168404Spjd zap_t *zap; 373168404Spjd int i; 374168404Spjd 375168404Spjd ASSERT3U(MZAP_ENT_LEN, ==, sizeof (mzap_ent_phys_t)); 376168404Spjd 377168404Spjd zap = kmem_zalloc(sizeof (zap_t), KM_SLEEP); 378219089Spjd rw_init(&zap->zap_rwlock, 0, 0, 0); 379168404Spjd rw_enter(&zap->zap_rwlock, RW_WRITER); 380168404Spjd zap->zap_objset = os; 381168404Spjd zap->zap_object = obj; 382168404Spjd zap->zap_dbuf = db; 383168404Spjd 384185029Spjd if (*(uint64_t *)db->db_data != ZBT_MICRO) { 385219089Spjd mutex_init(&zap->zap_f.zap_num_entries_mtx, 0, 0, 0); 386264669Sdelphij zap->zap_f.zap_block_shift = highbit64(db->db_size) - 1; 387168404Spjd } else { 388168404Spjd zap->zap_ismicro = TRUE; 389168404Spjd } 390168404Spjd 391168404Spjd /* 392168404Spjd * Make sure that zap_ismicro is set before we let others see 393168404Spjd * it, because zap_lockdir() checks zap_ismicro without the lock 394168404Spjd * held. 395168404Spjd */ 396275782Sdelphij winner = dmu_buf_set_user(db, zap, zap_evict); 397168404Spjd 398168404Spjd if (winner != NULL) { 399172443Spjd rw_exit(&zap->zap_rwlock); 400172443Spjd rw_destroy(&zap->zap_rwlock); 401168404Spjd if (!zap->zap_ismicro) 402168404Spjd mutex_destroy(&zap->zap_f.zap_num_entries_mtx); 403168404Spjd kmem_free(zap, sizeof (zap_t)); 404168404Spjd return (winner); 405168404Spjd } 406168404Spjd 407168404Spjd if (zap->zap_ismicro) { 408275782Sdelphij zap->zap_salt = zap_m_phys(zap)->mz_salt; 409275782Sdelphij zap->zap_normflags = zap_m_phys(zap)->mz_normflags; 410168404Spjd zap->zap_m.zap_num_chunks = db->db_size / MZAP_ENT_LEN - 1; 411168404Spjd avl_create(&zap->zap_m.zap_avl, mze_compare, 412168404Spjd sizeof (mzap_ent_t), offsetof(mzap_ent_t, mze_node)); 413168404Spjd 414168404Spjd for (i = 0; i < zap->zap_m.zap_num_chunks; i++) { 415168404Spjd mzap_ent_phys_t *mze = 416275782Sdelphij &zap_m_phys(zap)->mz_chunk[i]; 417168404Spjd if (mze->mze_name[0]) { 418185029Spjd zap_name_t *zn; 419185029Spjd 420185029Spjd zn = zap_name_alloc(zap, mze->mze_name, 421185029Spjd MT_EXACT); 422219089Spjd if (mze_insert(zap, i, zn->zn_hash) == 0) 423197150Spjd zap->zap_m.zap_num_entries++; 424197150Spjd else { 425197150Spjd printf("ZFS WARNING: Duplicated ZAP " 426197172Spjd "entry detected (%s).\n", 427197150Spjd mze->mze_name); 428197150Spjd } 429185029Spjd zap_name_free(zn); 430168404Spjd } 431168404Spjd } 432168404Spjd } else { 433275782Sdelphij zap->zap_salt = zap_f_phys(zap)->zap_salt; 434275782Sdelphij zap->zap_normflags = zap_f_phys(zap)->zap_normflags; 435168404Spjd 436168404Spjd ASSERT3U(sizeof (struct zap_leaf_header), ==, 437168404Spjd 2*ZAP_LEAF_CHUNKSIZE); 438168404Spjd 439168404Spjd /* 440168404Spjd * The embedded pointer table should not overlap the 441168404Spjd * other members. 442168404Spjd */ 443168404Spjd ASSERT3P(&ZAP_EMBEDDED_PTRTBL_ENT(zap, 0), >, 444275782Sdelphij &zap_f_phys(zap)->zap_salt); 445168404Spjd 446168404Spjd /* 447168404Spjd * The embedded pointer table should end at the end of 448168404Spjd * the block 449168404Spjd */ 450168404Spjd ASSERT3U((uintptr_t)&ZAP_EMBEDDED_PTRTBL_ENT(zap, 451168404Spjd 1<<ZAP_EMBEDDED_PTRTBL_SHIFT(zap)) - 452275782Sdelphij (uintptr_t)zap_f_phys(zap), ==, 453168404Spjd zap->zap_dbuf->db_size); 454168404Spjd } 455168404Spjd rw_exit(&zap->zap_rwlock); 456168404Spjd return (zap); 457168404Spjd} 458168404Spjd 459168404Spjdint 460168404Spjdzap_lockdir(objset_t *os, uint64_t obj, dmu_tx_t *tx, 461185029Spjd krw_t lti, boolean_t fatreader, boolean_t adding, zap_t **zapp) 462168404Spjd{ 463168404Spjd zap_t *zap; 464168404Spjd dmu_buf_t *db; 465168404Spjd krw_t lt; 466168404Spjd int err; 467168404Spjd 468168404Spjd *zapp = NULL; 469168404Spjd 470219089Spjd err = dmu_buf_hold(os, obj, 0, NULL, &db, DMU_READ_NO_PREFETCH); 471168404Spjd if (err) 472168404Spjd return (err); 473168404Spjd 474168404Spjd#ifdef ZFS_DEBUG 475168404Spjd { 476168404Spjd dmu_object_info_t doi; 477168404Spjd dmu_object_info_from_db(db, &doi); 478236884Smm ASSERT3U(DMU_OT_BYTESWAP(doi.doi_type), ==, DMU_BSWAP_ZAP); 479168404Spjd } 480168404Spjd#endif 481168404Spjd 482168404Spjd zap = dmu_buf_get_user(db); 483168404Spjd if (zap == NULL) 484168404Spjd zap = mzap_open(os, obj, db); 485168404Spjd 486168404Spjd /* 487168404Spjd * We're checking zap_ismicro without the lock held, in order to 488168404Spjd * tell what type of lock we want. Once we have some sort of 489168404Spjd * lock, see if it really is the right type. In practice this 490168404Spjd * can only be different if it was upgraded from micro to fat, 491168404Spjd * and micro wanted WRITER but fat only needs READER. 492168404Spjd */ 493168404Spjd lt = (!zap->zap_ismicro && fatreader) ? RW_READER : lti; 494168404Spjd rw_enter(&zap->zap_rwlock, lt); 495168404Spjd if (lt != ((!zap->zap_ismicro && fatreader) ? RW_READER : lti)) { 496168404Spjd /* it was upgraded, now we only need reader */ 497168404Spjd ASSERT(lt == RW_WRITER); 498168404Spjd ASSERT(RW_READER == 499168404Spjd (!zap->zap_ismicro && fatreader) ? RW_READER : lti); 500168404Spjd rw_downgrade(&zap->zap_rwlock); 501168404Spjd lt = RW_READER; 502168404Spjd } 503168404Spjd 504168404Spjd zap->zap_objset = os; 505168404Spjd 506168404Spjd if (lt == RW_WRITER) 507168404Spjd dmu_buf_will_dirty(db, tx); 508168404Spjd 509168404Spjd ASSERT3P(zap->zap_dbuf, ==, db); 510168404Spjd 511168404Spjd ASSERT(!zap->zap_ismicro || 512168404Spjd zap->zap_m.zap_num_entries <= zap->zap_m.zap_num_chunks); 513185029Spjd if (zap->zap_ismicro && tx && adding && 514168404Spjd zap->zap_m.zap_num_entries == zap->zap_m.zap_num_chunks) { 515168404Spjd uint64_t newsz = db->db_size + SPA_MINBLOCKSIZE; 516168404Spjd if (newsz > MZAP_MAX_BLKSZ) { 517168404Spjd dprintf("upgrading obj %llu: num_entries=%u\n", 518168404Spjd obj, zap->zap_m.zap_num_entries); 519168404Spjd *zapp = zap; 520219089Spjd return (mzap_upgrade(zapp, tx, 0)); 521168404Spjd } 522168404Spjd err = dmu_object_set_blocksize(os, obj, newsz, 0, tx); 523240415Smm ASSERT0(err); 524168404Spjd zap->zap_m.zap_num_chunks = 525168404Spjd db->db_size / MZAP_ENT_LEN - 1; 526168404Spjd } 527168404Spjd 528168404Spjd *zapp = zap; 529168404Spjd return (0); 530168404Spjd} 531168404Spjd 532168404Spjdvoid 533168404Spjdzap_unlockdir(zap_t *zap) 534168404Spjd{ 535168404Spjd rw_exit(&zap->zap_rwlock); 536168404Spjd dmu_buf_rele(zap->zap_dbuf, NULL); 537168404Spjd} 538168404Spjd 539185029Spjdstatic int 540219089Spjdmzap_upgrade(zap_t **zapp, dmu_tx_t *tx, zap_flags_t flags) 541168404Spjd{ 542168404Spjd mzap_phys_t *mzp; 543219089Spjd int i, sz, nchunks; 544219089Spjd int err = 0; 545185029Spjd zap_t *zap = *zapp; 546168404Spjd 547168404Spjd ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 548168404Spjd 549168404Spjd sz = zap->zap_dbuf->db_size; 550286556Smav mzp = zio_buf_alloc(sz); 551168404Spjd bcopy(zap->zap_dbuf->db_data, mzp, sz); 552168404Spjd nchunks = zap->zap_m.zap_num_chunks; 553168404Spjd 554219089Spjd if (!flags) { 555219089Spjd err = dmu_object_set_blocksize(zap->zap_objset, zap->zap_object, 556219089Spjd 1ULL << fzap_default_block_shift, 0, tx); 557219089Spjd if (err) { 558286556Smav zio_buf_free(mzp, sz); 559219089Spjd return (err); 560219089Spjd } 561185029Spjd } 562168404Spjd 563168404Spjd dprintf("upgrading obj=%llu with %u chunks\n", 564168404Spjd zap->zap_object, nchunks); 565185029Spjd /* XXX destroy the avl later, so we can use the stored hash value */ 566168404Spjd mze_destroy(zap); 567168404Spjd 568219089Spjd fzap_upgrade(zap, tx, flags); 569168404Spjd 570168404Spjd for (i = 0; i < nchunks; i++) { 571168404Spjd mzap_ent_phys_t *mze = &mzp->mz_chunk[i]; 572185029Spjd zap_name_t *zn; 573168404Spjd if (mze->mze_name[0] == 0) 574168404Spjd continue; 575168404Spjd dprintf("adding %s=%llu\n", 576168404Spjd mze->mze_name, mze->mze_value); 577185029Spjd zn = zap_name_alloc(zap, mze->mze_name, MT_EXACT); 578185029Spjd err = fzap_add_cd(zn, 8, 1, &mze->mze_value, mze->mze_cd, tx); 579185029Spjd zap = zn->zn_zap; /* fzap_add_cd() may change zap */ 580185029Spjd zap_name_free(zn); 581185029Spjd if (err) 582185029Spjd break; 583168404Spjd } 584286556Smav zio_buf_free(mzp, sz); 585185029Spjd *zapp = zap; 586185029Spjd return (err); 587168404Spjd} 588168404Spjd 589259813Sdelphijvoid 590219089Spjdmzap_create_impl(objset_t *os, uint64_t obj, int normflags, zap_flags_t flags, 591219089Spjd dmu_tx_t *tx) 592168404Spjd{ 593168404Spjd dmu_buf_t *db; 594168404Spjd mzap_phys_t *zp; 595168404Spjd 596219089Spjd VERIFY(0 == dmu_buf_hold(os, obj, 0, FTAG, &db, DMU_READ_NO_PREFETCH)); 597168404Spjd 598168404Spjd#ifdef ZFS_DEBUG 599168404Spjd { 600168404Spjd dmu_object_info_t doi; 601168404Spjd dmu_object_info_from_db(db, &doi); 602236884Smm ASSERT3U(DMU_OT_BYTESWAP(doi.doi_type), ==, DMU_BSWAP_ZAP); 603168404Spjd } 604168404Spjd#endif 605168404Spjd 606168404Spjd dmu_buf_will_dirty(db, tx); 607168404Spjd zp = db->db_data; 608168404Spjd zp->mz_block_type = ZBT_MICRO; 609168404Spjd zp->mz_salt = ((uintptr_t)db ^ (uintptr_t)tx ^ (obj << 1)) | 1ULL; 610185029Spjd zp->mz_normflags = normflags; 611168404Spjd dmu_buf_rele(db, FTAG); 612219089Spjd 613219089Spjd if (flags != 0) { 614219089Spjd zap_t *zap; 615219089Spjd /* Only fat zap supports flags; upgrade immediately. */ 616219089Spjd VERIFY(0 == zap_lockdir(os, obj, tx, RW_WRITER, 617219089Spjd B_FALSE, B_FALSE, &zap)); 618219089Spjd VERIFY3U(0, ==, mzap_upgrade(&zap, tx, flags)); 619219089Spjd zap_unlockdir(zap); 620219089Spjd } 621168404Spjd} 622168404Spjd 623168404Spjdint 624168404Spjdzap_create_claim(objset_t *os, uint64_t obj, dmu_object_type_t ot, 625168404Spjd dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) 626168404Spjd{ 627185029Spjd return (zap_create_claim_norm(os, obj, 628185029Spjd 0, ot, bonustype, bonuslen, tx)); 629185029Spjd} 630185029Spjd 631185029Spjdint 632185029Spjdzap_create_claim_norm(objset_t *os, uint64_t obj, int normflags, 633185029Spjd dmu_object_type_t ot, 634185029Spjd dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) 635185029Spjd{ 636168404Spjd int err; 637168404Spjd 638168404Spjd err = dmu_object_claim(os, obj, ot, 0, bonustype, bonuslen, tx); 639168404Spjd if (err != 0) 640168404Spjd return (err); 641219089Spjd mzap_create_impl(os, obj, normflags, 0, tx); 642168404Spjd return (0); 643168404Spjd} 644168404Spjd 645168404Spjduint64_t 646168404Spjdzap_create(objset_t *os, dmu_object_type_t ot, 647168404Spjd dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) 648168404Spjd{ 649185029Spjd return (zap_create_norm(os, 0, ot, bonustype, bonuslen, tx)); 650185029Spjd} 651185029Spjd 652185029Spjduint64_t 653185029Spjdzap_create_norm(objset_t *os, int normflags, dmu_object_type_t ot, 654185029Spjd dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) 655185029Spjd{ 656168404Spjd uint64_t obj = dmu_object_alloc(os, ot, 0, bonustype, bonuslen, tx); 657168404Spjd 658219089Spjd mzap_create_impl(os, obj, normflags, 0, tx); 659168404Spjd return (obj); 660168404Spjd} 661168404Spjd 662219089Spjduint64_t 663219089Spjdzap_create_flags(objset_t *os, int normflags, zap_flags_t flags, 664219089Spjd dmu_object_type_t ot, int leaf_blockshift, int indirect_blockshift, 665219089Spjd dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) 666219089Spjd{ 667219089Spjd uint64_t obj = dmu_object_alloc(os, ot, 0, bonustype, bonuslen, tx); 668219089Spjd 669219089Spjd ASSERT(leaf_blockshift >= SPA_MINBLOCKSHIFT && 670274337Sdelphij leaf_blockshift <= SPA_OLD_MAXBLOCKSHIFT && 671219089Spjd indirect_blockshift >= SPA_MINBLOCKSHIFT && 672274337Sdelphij indirect_blockshift <= SPA_OLD_MAXBLOCKSHIFT); 673219089Spjd 674219089Spjd VERIFY(dmu_object_set_blocksize(os, obj, 675219089Spjd 1ULL << leaf_blockshift, indirect_blockshift, tx) == 0); 676219089Spjd 677219089Spjd mzap_create_impl(os, obj, normflags, flags, tx); 678219089Spjd return (obj); 679219089Spjd} 680219089Spjd 681168404Spjdint 682168404Spjdzap_destroy(objset_t *os, uint64_t zapobj, dmu_tx_t *tx) 683168404Spjd{ 684168404Spjd /* 685168404Spjd * dmu_object_free will free the object number and free the 686168404Spjd * data. Freeing the data will cause our pageout function to be 687168404Spjd * called, which will destroy our data (zap_leaf_t's and zap_t). 688168404Spjd */ 689168404Spjd 690168404Spjd return (dmu_object_free(os, zapobj, tx)); 691168404Spjd} 692168404Spjd 693168404Spjd_NOTE(ARGSUSED(0)) 694168404Spjdvoid 695168404Spjdzap_evict(dmu_buf_t *db, void *vzap) 696168404Spjd{ 697168404Spjd zap_t *zap = vzap; 698168404Spjd 699168404Spjd rw_destroy(&zap->zap_rwlock); 700168404Spjd 701168404Spjd if (zap->zap_ismicro) 702168404Spjd mze_destroy(zap); 703168404Spjd else 704168404Spjd mutex_destroy(&zap->zap_f.zap_num_entries_mtx); 705168404Spjd 706168404Spjd kmem_free(zap, sizeof (zap_t)); 707168404Spjd} 708168404Spjd 709168404Spjdint 710168404Spjdzap_count(objset_t *os, uint64_t zapobj, uint64_t *count) 711168404Spjd{ 712168404Spjd zap_t *zap; 713168404Spjd int err; 714168404Spjd 715185029Spjd err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); 716168404Spjd if (err) 717168404Spjd return (err); 718168404Spjd if (!zap->zap_ismicro) { 719168404Spjd err = fzap_count(zap, count); 720168404Spjd } else { 721168404Spjd *count = zap->zap_m.zap_num_entries; 722168404Spjd } 723168404Spjd zap_unlockdir(zap); 724168404Spjd return (err); 725168404Spjd} 726168404Spjd 727168404Spjd/* 728185029Spjd * zn may be NULL; if not specified, it will be computed if needed. 729185029Spjd * See also the comment above zap_entry_normalization_conflict(). 730168404Spjd */ 731185029Spjdstatic boolean_t 732185029Spjdmzap_normalization_conflict(zap_t *zap, zap_name_t *zn, mzap_ent_t *mze) 733185029Spjd{ 734185029Spjd mzap_ent_t *other; 735185029Spjd int direction = AVL_BEFORE; 736185029Spjd boolean_t allocdzn = B_FALSE; 737168404Spjd 738185029Spjd if (zap->zap_normflags == 0) 739185029Spjd return (B_FALSE); 740185029Spjd 741185029Spjdagain: 742185029Spjd for (other = avl_walk(&zap->zap_m.zap_avl, mze, direction); 743185029Spjd other && other->mze_hash == mze->mze_hash; 744185029Spjd other = avl_walk(&zap->zap_m.zap_avl, other, direction)) { 745185029Spjd 746185029Spjd if (zn == NULL) { 747219089Spjd zn = zap_name_alloc(zap, MZE_PHYS(zap, mze)->mze_name, 748185029Spjd MT_FIRST); 749185029Spjd allocdzn = B_TRUE; 750185029Spjd } 751219089Spjd if (zap_match(zn, MZE_PHYS(zap, other)->mze_name)) { 752185029Spjd if (allocdzn) 753185029Spjd zap_name_free(zn); 754185029Spjd return (B_TRUE); 755185029Spjd } 756185029Spjd } 757185029Spjd 758185029Spjd if (direction == AVL_BEFORE) { 759185029Spjd direction = AVL_AFTER; 760185029Spjd goto again; 761185029Spjd } 762185029Spjd 763185029Spjd if (allocdzn) 764185029Spjd zap_name_free(zn); 765185029Spjd return (B_FALSE); 766185029Spjd} 767185029Spjd 768185029Spjd/* 769185029Spjd * Routines for manipulating attributes. 770185029Spjd */ 771185029Spjd 772168404Spjdint 773168404Spjdzap_lookup(objset_t *os, uint64_t zapobj, const char *name, 774168404Spjd uint64_t integer_size, uint64_t num_integers, void *buf) 775168404Spjd{ 776185029Spjd return (zap_lookup_norm(os, zapobj, name, integer_size, 777185029Spjd num_integers, buf, MT_EXACT, NULL, 0, NULL)); 778185029Spjd} 779185029Spjd 780185029Spjdint 781185029Spjdzap_lookup_norm(objset_t *os, uint64_t zapobj, const char *name, 782185029Spjd uint64_t integer_size, uint64_t num_integers, void *buf, 783185029Spjd matchtype_t mt, char *realname, int rn_len, 784185029Spjd boolean_t *ncp) 785185029Spjd{ 786168404Spjd zap_t *zap; 787168404Spjd int err; 788168404Spjd mzap_ent_t *mze; 789185029Spjd zap_name_t *zn; 790168404Spjd 791185029Spjd err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); 792168404Spjd if (err) 793168404Spjd return (err); 794185029Spjd zn = zap_name_alloc(zap, name, mt); 795185029Spjd if (zn == NULL) { 796185029Spjd zap_unlockdir(zap); 797249195Smm return (SET_ERROR(ENOTSUP)); 798185029Spjd } 799185029Spjd 800168404Spjd if (!zap->zap_ismicro) { 801185029Spjd err = fzap_lookup(zn, integer_size, num_integers, buf, 802185029Spjd realname, rn_len, ncp); 803168404Spjd } else { 804185029Spjd mze = mze_find(zn); 805168404Spjd if (mze == NULL) { 806249195Smm err = SET_ERROR(ENOENT); 807168404Spjd } else { 808185029Spjd if (num_integers < 1) { 809249195Smm err = SET_ERROR(EOVERFLOW); 810185029Spjd } else if (integer_size != 8) { 811249195Smm err = SET_ERROR(EINVAL); 812185029Spjd } else { 813219089Spjd *(uint64_t *)buf = 814219089Spjd MZE_PHYS(zap, mze)->mze_value; 815185029Spjd (void) strlcpy(realname, 816219089Spjd MZE_PHYS(zap, mze)->mze_name, rn_len); 817185029Spjd if (ncp) { 818185029Spjd *ncp = mzap_normalization_conflict(zap, 819185029Spjd zn, mze); 820185029Spjd } 821185029Spjd } 822168404Spjd } 823168404Spjd } 824185029Spjd zap_name_free(zn); 825168404Spjd zap_unlockdir(zap); 826168404Spjd return (err); 827168404Spjd} 828168404Spjd 829168404Spjdint 830219089Spjdzap_prefetch_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, 831219089Spjd int key_numints) 832219089Spjd{ 833219089Spjd zap_t *zap; 834219089Spjd int err; 835219089Spjd zap_name_t *zn; 836219089Spjd 837219089Spjd err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); 838219089Spjd if (err) 839219089Spjd return (err); 840219089Spjd zn = zap_name_alloc_uint64(zap, key, key_numints); 841219089Spjd if (zn == NULL) { 842219089Spjd zap_unlockdir(zap); 843249195Smm return (SET_ERROR(ENOTSUP)); 844219089Spjd } 845219089Spjd 846219089Spjd fzap_prefetch(zn); 847219089Spjd zap_name_free(zn); 848219089Spjd zap_unlockdir(zap); 849219089Spjd return (err); 850219089Spjd} 851219089Spjd 852219089Spjdint 853219089Spjdzap_lookup_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, 854219089Spjd int key_numints, uint64_t integer_size, uint64_t num_integers, void *buf) 855219089Spjd{ 856219089Spjd zap_t *zap; 857219089Spjd int err; 858219089Spjd zap_name_t *zn; 859219089Spjd 860219089Spjd err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); 861219089Spjd if (err) 862219089Spjd return (err); 863219089Spjd zn = zap_name_alloc_uint64(zap, key, key_numints); 864219089Spjd if (zn == NULL) { 865219089Spjd zap_unlockdir(zap); 866249195Smm return (SET_ERROR(ENOTSUP)); 867219089Spjd } 868219089Spjd 869219089Spjd err = fzap_lookup(zn, integer_size, num_integers, buf, 870219089Spjd NULL, 0, NULL); 871219089Spjd zap_name_free(zn); 872219089Spjd zap_unlockdir(zap); 873219089Spjd return (err); 874219089Spjd} 875219089Spjd 876219089Spjdint 877219089Spjdzap_contains(objset_t *os, uint64_t zapobj, const char *name) 878219089Spjd{ 879259813Sdelphij int err = zap_lookup_norm(os, zapobj, name, 0, 880259813Sdelphij 0, NULL, MT_EXACT, NULL, 0, NULL); 881219089Spjd if (err == EOVERFLOW || err == EINVAL) 882219089Spjd err = 0; /* found, but skipped reading the value */ 883219089Spjd return (err); 884219089Spjd} 885219089Spjd 886219089Spjdint 887168404Spjdzap_length(objset_t *os, uint64_t zapobj, const char *name, 888168404Spjd uint64_t *integer_size, uint64_t *num_integers) 889168404Spjd{ 890168404Spjd zap_t *zap; 891168404Spjd int err; 892168404Spjd mzap_ent_t *mze; 893185029Spjd zap_name_t *zn; 894168404Spjd 895185029Spjd err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); 896168404Spjd if (err) 897168404Spjd return (err); 898185029Spjd zn = zap_name_alloc(zap, name, MT_EXACT); 899185029Spjd if (zn == NULL) { 900185029Spjd zap_unlockdir(zap); 901249195Smm return (SET_ERROR(ENOTSUP)); 902185029Spjd } 903168404Spjd if (!zap->zap_ismicro) { 904185029Spjd err = fzap_length(zn, integer_size, num_integers); 905168404Spjd } else { 906185029Spjd mze = mze_find(zn); 907168404Spjd if (mze == NULL) { 908249195Smm err = SET_ERROR(ENOENT); 909168404Spjd } else { 910168404Spjd if (integer_size) 911168404Spjd *integer_size = 8; 912168404Spjd if (num_integers) 913168404Spjd *num_integers = 1; 914168404Spjd } 915168404Spjd } 916185029Spjd zap_name_free(zn); 917168404Spjd zap_unlockdir(zap); 918168404Spjd return (err); 919168404Spjd} 920168404Spjd 921219089Spjdint 922219089Spjdzap_length_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, 923219089Spjd int key_numints, uint64_t *integer_size, uint64_t *num_integers) 924219089Spjd{ 925219089Spjd zap_t *zap; 926219089Spjd int err; 927219089Spjd zap_name_t *zn; 928219089Spjd 929219089Spjd err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); 930219089Spjd if (err) 931219089Spjd return (err); 932219089Spjd zn = zap_name_alloc_uint64(zap, key, key_numints); 933219089Spjd if (zn == NULL) { 934219089Spjd zap_unlockdir(zap); 935249195Smm return (SET_ERROR(ENOTSUP)); 936219089Spjd } 937219089Spjd err = fzap_length(zn, integer_size, num_integers); 938219089Spjd zap_name_free(zn); 939219089Spjd zap_unlockdir(zap); 940219089Spjd return (err); 941219089Spjd} 942219089Spjd 943168404Spjdstatic void 944185029Spjdmzap_addent(zap_name_t *zn, uint64_t value) 945168404Spjd{ 946168404Spjd int i; 947185029Spjd zap_t *zap = zn->zn_zap; 948168404Spjd int start = zap->zap_m.zap_alloc_next; 949168404Spjd uint32_t cd; 950168404Spjd 951168404Spjd ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 952168404Spjd 953168404Spjd#ifdef ZFS_DEBUG 954168404Spjd for (i = 0; i < zap->zap_m.zap_num_chunks; i++) { 955275782Sdelphij mzap_ent_phys_t *mze = &zap_m_phys(zap)->mz_chunk[i]; 956219089Spjd ASSERT(strcmp(zn->zn_key_orig, mze->mze_name) != 0); 957168404Spjd } 958168404Spjd#endif 959168404Spjd 960185029Spjd cd = mze_find_unused_cd(zap, zn->zn_hash); 961168404Spjd /* given the limited size of the microzap, this can't happen */ 962219089Spjd ASSERT(cd < zap_maxcd(zap)); 963168404Spjd 964168404Spjdagain: 965168404Spjd for (i = start; i < zap->zap_m.zap_num_chunks; i++) { 966275782Sdelphij mzap_ent_phys_t *mze = &zap_m_phys(zap)->mz_chunk[i]; 967168404Spjd if (mze->mze_name[0] == 0) { 968168404Spjd mze->mze_value = value; 969168404Spjd mze->mze_cd = cd; 970219089Spjd (void) strcpy(mze->mze_name, zn->zn_key_orig); 971168404Spjd zap->zap_m.zap_num_entries++; 972168404Spjd zap->zap_m.zap_alloc_next = i+1; 973168404Spjd if (zap->zap_m.zap_alloc_next == 974168404Spjd zap->zap_m.zap_num_chunks) 975168404Spjd zap->zap_m.zap_alloc_next = 0; 976219089Spjd VERIFY(0 == mze_insert(zap, i, zn->zn_hash)); 977168404Spjd return; 978168404Spjd } 979168404Spjd } 980168404Spjd if (start != 0) { 981168404Spjd start = 0; 982168404Spjd goto again; 983168404Spjd } 984168404Spjd ASSERT(!"out of entries!"); 985168404Spjd} 986168404Spjd 987168404Spjdint 988219089Spjdzap_add(objset_t *os, uint64_t zapobj, const char *key, 989168404Spjd int integer_size, uint64_t num_integers, 990168404Spjd const void *val, dmu_tx_t *tx) 991168404Spjd{ 992168404Spjd zap_t *zap; 993168404Spjd int err; 994168404Spjd mzap_ent_t *mze; 995168404Spjd const uint64_t *intval = val; 996185029Spjd zap_name_t *zn; 997168404Spjd 998185029Spjd err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, &zap); 999168404Spjd if (err) 1000168404Spjd return (err); 1001219089Spjd zn = zap_name_alloc(zap, key, MT_EXACT); 1002185029Spjd if (zn == NULL) { 1003185029Spjd zap_unlockdir(zap); 1004249195Smm return (SET_ERROR(ENOTSUP)); 1005185029Spjd } 1006168404Spjd if (!zap->zap_ismicro) { 1007185029Spjd err = fzap_add(zn, integer_size, num_integers, val, tx); 1008185029Spjd zap = zn->zn_zap; /* fzap_add() may change zap */ 1009168404Spjd } else if (integer_size != 8 || num_integers != 1 || 1010219089Spjd strlen(key) >= MZAP_NAME_LEN) { 1011219089Spjd err = mzap_upgrade(&zn->zn_zap, tx, 0); 1012185029Spjd if (err == 0) 1013185029Spjd err = fzap_add(zn, integer_size, num_integers, val, tx); 1014185029Spjd zap = zn->zn_zap; /* fzap_add() may change zap */ 1015168404Spjd } else { 1016185029Spjd mze = mze_find(zn); 1017168404Spjd if (mze != NULL) { 1018249195Smm err = SET_ERROR(EEXIST); 1019168404Spjd } else { 1020185029Spjd mzap_addent(zn, *intval); 1021168404Spjd } 1022168404Spjd } 1023185029Spjd ASSERT(zap == zn->zn_zap); 1024185029Spjd zap_name_free(zn); 1025185029Spjd if (zap != NULL) /* may be NULL if fzap_add() failed */ 1026185029Spjd zap_unlockdir(zap); 1027168404Spjd return (err); 1028168404Spjd} 1029168404Spjd 1030168404Spjdint 1031219089Spjdzap_add_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, 1032219089Spjd int key_numints, int integer_size, uint64_t num_integers, 1033219089Spjd const void *val, dmu_tx_t *tx) 1034219089Spjd{ 1035219089Spjd zap_t *zap; 1036219089Spjd int err; 1037219089Spjd zap_name_t *zn; 1038219089Spjd 1039219089Spjd err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, &zap); 1040219089Spjd if (err) 1041219089Spjd return (err); 1042219089Spjd zn = zap_name_alloc_uint64(zap, key, key_numints); 1043219089Spjd if (zn == NULL) { 1044219089Spjd zap_unlockdir(zap); 1045249195Smm return (SET_ERROR(ENOTSUP)); 1046219089Spjd } 1047219089Spjd err = fzap_add(zn, integer_size, num_integers, val, tx); 1048219089Spjd zap = zn->zn_zap; /* fzap_add() may change zap */ 1049219089Spjd zap_name_free(zn); 1050219089Spjd if (zap != NULL) /* may be NULL if fzap_add() failed */ 1051219089Spjd zap_unlockdir(zap); 1052219089Spjd return (err); 1053219089Spjd} 1054219089Spjd 1055219089Spjdint 1056168404Spjdzap_update(objset_t *os, uint64_t zapobj, const char *name, 1057168404Spjd int integer_size, uint64_t num_integers, const void *val, dmu_tx_t *tx) 1058168404Spjd{ 1059168404Spjd zap_t *zap; 1060168404Spjd mzap_ent_t *mze; 1061219089Spjd uint64_t oldval; 1062168404Spjd const uint64_t *intval = val; 1063185029Spjd zap_name_t *zn; 1064168404Spjd int err; 1065168404Spjd 1066219089Spjd#ifdef ZFS_DEBUG 1067219089Spjd /* 1068219089Spjd * If there is an old value, it shouldn't change across the 1069219089Spjd * lockdir (eg, due to bprewrite's xlation). 1070219089Spjd */ 1071219089Spjd if (integer_size == 8 && num_integers == 1) 1072219089Spjd (void) zap_lookup(os, zapobj, name, 8, 1, &oldval); 1073219089Spjd#endif 1074219089Spjd 1075185029Spjd err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, &zap); 1076168404Spjd if (err) 1077168404Spjd return (err); 1078185029Spjd zn = zap_name_alloc(zap, name, MT_EXACT); 1079185029Spjd if (zn == NULL) { 1080185029Spjd zap_unlockdir(zap); 1081249195Smm return (SET_ERROR(ENOTSUP)); 1082185029Spjd } 1083168404Spjd if (!zap->zap_ismicro) { 1084185029Spjd err = fzap_update(zn, integer_size, num_integers, val, tx); 1085185029Spjd zap = zn->zn_zap; /* fzap_update() may change zap */ 1086168404Spjd } else if (integer_size != 8 || num_integers != 1 || 1087168404Spjd strlen(name) >= MZAP_NAME_LEN) { 1088168404Spjd dprintf("upgrading obj %llu: intsz=%u numint=%llu name=%s\n", 1089168404Spjd zapobj, integer_size, num_integers, name); 1090219089Spjd err = mzap_upgrade(&zn->zn_zap, tx, 0); 1091185029Spjd if (err == 0) 1092185029Spjd err = fzap_update(zn, integer_size, num_integers, 1093185029Spjd val, tx); 1094185029Spjd zap = zn->zn_zap; /* fzap_update() may change zap */ 1095168404Spjd } else { 1096185029Spjd mze = mze_find(zn); 1097168404Spjd if (mze != NULL) { 1098219089Spjd ASSERT3U(MZE_PHYS(zap, mze)->mze_value, ==, oldval); 1099219089Spjd MZE_PHYS(zap, mze)->mze_value = *intval; 1100168404Spjd } else { 1101185029Spjd mzap_addent(zn, *intval); 1102168404Spjd } 1103168404Spjd } 1104185029Spjd ASSERT(zap == zn->zn_zap); 1105185029Spjd zap_name_free(zn); 1106185029Spjd if (zap != NULL) /* may be NULL if fzap_upgrade() failed */ 1107185029Spjd zap_unlockdir(zap); 1108168404Spjd return (err); 1109168404Spjd} 1110168404Spjd 1111168404Spjdint 1112219089Spjdzap_update_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, 1113219089Spjd int key_numints, 1114219089Spjd int integer_size, uint64_t num_integers, const void *val, dmu_tx_t *tx) 1115219089Spjd{ 1116219089Spjd zap_t *zap; 1117219089Spjd zap_name_t *zn; 1118219089Spjd int err; 1119219089Spjd 1120219089Spjd err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, &zap); 1121219089Spjd if (err) 1122219089Spjd return (err); 1123219089Spjd zn = zap_name_alloc_uint64(zap, key, key_numints); 1124219089Spjd if (zn == NULL) { 1125219089Spjd zap_unlockdir(zap); 1126249195Smm return (SET_ERROR(ENOTSUP)); 1127219089Spjd } 1128219089Spjd err = fzap_update(zn, integer_size, num_integers, val, tx); 1129219089Spjd zap = zn->zn_zap; /* fzap_update() may change zap */ 1130219089Spjd zap_name_free(zn); 1131219089Spjd if (zap != NULL) /* may be NULL if fzap_upgrade() failed */ 1132219089Spjd zap_unlockdir(zap); 1133219089Spjd return (err); 1134219089Spjd} 1135219089Spjd 1136219089Spjdint 1137168404Spjdzap_remove(objset_t *os, uint64_t zapobj, const char *name, dmu_tx_t *tx) 1138168404Spjd{ 1139185029Spjd return (zap_remove_norm(os, zapobj, name, MT_EXACT, tx)); 1140185029Spjd} 1141185029Spjd 1142185029Spjdint 1143185029Spjdzap_remove_norm(objset_t *os, uint64_t zapobj, const char *name, 1144185029Spjd matchtype_t mt, dmu_tx_t *tx) 1145185029Spjd{ 1146168404Spjd zap_t *zap; 1147168404Spjd int err; 1148168404Spjd mzap_ent_t *mze; 1149185029Spjd zap_name_t *zn; 1150168404Spjd 1151185029Spjd err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, FALSE, &zap); 1152168404Spjd if (err) 1153168404Spjd return (err); 1154185029Spjd zn = zap_name_alloc(zap, name, mt); 1155185029Spjd if (zn == NULL) { 1156185029Spjd zap_unlockdir(zap); 1157249195Smm return (SET_ERROR(ENOTSUP)); 1158185029Spjd } 1159168404Spjd if (!zap->zap_ismicro) { 1160185029Spjd err = fzap_remove(zn, tx); 1161168404Spjd } else { 1162185029Spjd mze = mze_find(zn); 1163168404Spjd if (mze == NULL) { 1164249195Smm err = SET_ERROR(ENOENT); 1165168404Spjd } else { 1166168404Spjd zap->zap_m.zap_num_entries--; 1167275782Sdelphij bzero(&zap_m_phys(zap)->mz_chunk[mze->mze_chunkid], 1168168404Spjd sizeof (mzap_ent_phys_t)); 1169168404Spjd mze_remove(zap, mze); 1170168404Spjd } 1171168404Spjd } 1172185029Spjd zap_name_free(zn); 1173168404Spjd zap_unlockdir(zap); 1174168404Spjd return (err); 1175168404Spjd} 1176168404Spjd 1177219089Spjdint 1178219089Spjdzap_remove_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, 1179219089Spjd int key_numints, dmu_tx_t *tx) 1180219089Spjd{ 1181219089Spjd zap_t *zap; 1182219089Spjd int err; 1183219089Spjd zap_name_t *zn; 1184219089Spjd 1185219089Spjd err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, FALSE, &zap); 1186219089Spjd if (err) 1187219089Spjd return (err); 1188219089Spjd zn = zap_name_alloc_uint64(zap, key, key_numints); 1189219089Spjd if (zn == NULL) { 1190219089Spjd zap_unlockdir(zap); 1191249195Smm return (SET_ERROR(ENOTSUP)); 1192219089Spjd } 1193219089Spjd err = fzap_remove(zn, tx); 1194219089Spjd zap_name_free(zn); 1195219089Spjd zap_unlockdir(zap); 1196219089Spjd return (err); 1197219089Spjd} 1198219089Spjd 1199168404Spjd/* 1200168404Spjd * Routines for iterating over the attributes. 1201168404Spjd */ 1202168404Spjd 1203168404Spjdvoid 1204168404Spjdzap_cursor_init_serialized(zap_cursor_t *zc, objset_t *os, uint64_t zapobj, 1205168404Spjd uint64_t serialized) 1206168404Spjd{ 1207168404Spjd zc->zc_objset = os; 1208168404Spjd zc->zc_zap = NULL; 1209168404Spjd zc->zc_leaf = NULL; 1210168404Spjd zc->zc_zapobj = zapobj; 1211219089Spjd zc->zc_serialized = serialized; 1212219089Spjd zc->zc_hash = 0; 1213219089Spjd zc->zc_cd = 0; 1214168404Spjd} 1215168404Spjd 1216168404Spjdvoid 1217168404Spjdzap_cursor_init(zap_cursor_t *zc, objset_t *os, uint64_t zapobj) 1218168404Spjd{ 1219168404Spjd zap_cursor_init_serialized(zc, os, zapobj, 0); 1220168404Spjd} 1221168404Spjd 1222168404Spjdvoid 1223168404Spjdzap_cursor_fini(zap_cursor_t *zc) 1224168404Spjd{ 1225168404Spjd if (zc->zc_zap) { 1226168404Spjd rw_enter(&zc->zc_zap->zap_rwlock, RW_READER); 1227168404Spjd zap_unlockdir(zc->zc_zap); 1228168404Spjd zc->zc_zap = NULL; 1229168404Spjd } 1230168404Spjd if (zc->zc_leaf) { 1231168404Spjd rw_enter(&zc->zc_leaf->l_rwlock, RW_READER); 1232168404Spjd zap_put_leaf(zc->zc_leaf); 1233168404Spjd zc->zc_leaf = NULL; 1234168404Spjd } 1235168404Spjd zc->zc_objset = NULL; 1236168404Spjd} 1237168404Spjd 1238168404Spjduint64_t 1239168404Spjdzap_cursor_serialize(zap_cursor_t *zc) 1240168404Spjd{ 1241168404Spjd if (zc->zc_hash == -1ULL) 1242168404Spjd return (-1ULL); 1243219089Spjd if (zc->zc_zap == NULL) 1244219089Spjd return (zc->zc_serialized); 1245219089Spjd ASSERT((zc->zc_hash & zap_maxcd(zc->zc_zap)) == 0); 1246219089Spjd ASSERT(zc->zc_cd < zap_maxcd(zc->zc_zap)); 1247219089Spjd 1248219089Spjd /* 1249219089Spjd * We want to keep the high 32 bits of the cursor zero if we can, so 1250219089Spjd * that 32-bit programs can access this. So usually use a small 1251219089Spjd * (28-bit) hash value so we can fit 4 bits of cd into the low 32-bits 1252219089Spjd * of the cursor. 1253219089Spjd * 1254219089Spjd * [ collision differentiator | zap_hashbits()-bit hash value ] 1255219089Spjd */ 1256219089Spjd return ((zc->zc_hash >> (64 - zap_hashbits(zc->zc_zap))) | 1257219089Spjd ((uint64_t)zc->zc_cd << zap_hashbits(zc->zc_zap))); 1258168404Spjd} 1259168404Spjd 1260168404Spjdint 1261168404Spjdzap_cursor_retrieve(zap_cursor_t *zc, zap_attribute_t *za) 1262168404Spjd{ 1263168404Spjd int err; 1264168404Spjd avl_index_t idx; 1265168404Spjd mzap_ent_t mze_tofind; 1266168404Spjd mzap_ent_t *mze; 1267168404Spjd 1268168404Spjd if (zc->zc_hash == -1ULL) 1269249195Smm return (SET_ERROR(ENOENT)); 1270168404Spjd 1271168404Spjd if (zc->zc_zap == NULL) { 1272219089Spjd int hb; 1273168404Spjd err = zap_lockdir(zc->zc_objset, zc->zc_zapobj, NULL, 1274185029Spjd RW_READER, TRUE, FALSE, &zc->zc_zap); 1275168404Spjd if (err) 1276168404Spjd return (err); 1277219089Spjd 1278219089Spjd /* 1279219089Spjd * To support zap_cursor_init_serialized, advance, retrieve, 1280219089Spjd * we must add to the existing zc_cd, which may already 1281219089Spjd * be 1 due to the zap_cursor_advance. 1282219089Spjd */ 1283219089Spjd ASSERT(zc->zc_hash == 0); 1284219089Spjd hb = zap_hashbits(zc->zc_zap); 1285219089Spjd zc->zc_hash = zc->zc_serialized << (64 - hb); 1286219089Spjd zc->zc_cd += zc->zc_serialized >> hb; 1287219089Spjd if (zc->zc_cd >= zap_maxcd(zc->zc_zap)) /* corrupt serialized */ 1288219089Spjd zc->zc_cd = 0; 1289168404Spjd } else { 1290168404Spjd rw_enter(&zc->zc_zap->zap_rwlock, RW_READER); 1291168404Spjd } 1292168404Spjd if (!zc->zc_zap->zap_ismicro) { 1293168404Spjd err = fzap_cursor_retrieve(zc->zc_zap, zc, za); 1294168404Spjd } else { 1295168404Spjd mze_tofind.mze_hash = zc->zc_hash; 1296219089Spjd mze_tofind.mze_cd = zc->zc_cd; 1297168404Spjd 1298168404Spjd mze = avl_find(&zc->zc_zap->zap_m.zap_avl, &mze_tofind, &idx); 1299168404Spjd if (mze == NULL) { 1300168404Spjd mze = avl_nearest(&zc->zc_zap->zap_m.zap_avl, 1301168404Spjd idx, AVL_AFTER); 1302168404Spjd } 1303168404Spjd if (mze) { 1304219089Spjd mzap_ent_phys_t *mzep = MZE_PHYS(zc->zc_zap, mze); 1305219089Spjd ASSERT3U(mze->mze_cd, ==, mzep->mze_cd); 1306185029Spjd za->za_normalization_conflict = 1307185029Spjd mzap_normalization_conflict(zc->zc_zap, NULL, mze); 1308168404Spjd za->za_integer_length = 8; 1309168404Spjd za->za_num_integers = 1; 1310219089Spjd za->za_first_integer = mzep->mze_value; 1311219089Spjd (void) strcpy(za->za_name, mzep->mze_name); 1312168404Spjd zc->zc_hash = mze->mze_hash; 1313219089Spjd zc->zc_cd = mze->mze_cd; 1314168404Spjd err = 0; 1315168404Spjd } else { 1316168404Spjd zc->zc_hash = -1ULL; 1317249195Smm err = SET_ERROR(ENOENT); 1318168404Spjd } 1319168404Spjd } 1320168404Spjd rw_exit(&zc->zc_zap->zap_rwlock); 1321168404Spjd return (err); 1322168404Spjd} 1323168404Spjd 1324168404Spjdvoid 1325168404Spjdzap_cursor_advance(zap_cursor_t *zc) 1326168404Spjd{ 1327168404Spjd if (zc->zc_hash == -1ULL) 1328168404Spjd return; 1329168404Spjd zc->zc_cd++; 1330219089Spjd} 1331219089Spjd 1332219089Spjdint 1333219089Spjdzap_cursor_move_to_key(zap_cursor_t *zc, const char *name, matchtype_t mt) 1334219089Spjd{ 1335219089Spjd int err = 0; 1336219089Spjd mzap_ent_t *mze; 1337219089Spjd zap_name_t *zn; 1338219089Spjd 1339219089Spjd if (zc->zc_zap == NULL) { 1340219089Spjd err = zap_lockdir(zc->zc_objset, zc->zc_zapobj, NULL, 1341219089Spjd RW_READER, TRUE, FALSE, &zc->zc_zap); 1342219089Spjd if (err) 1343219089Spjd return (err); 1344219089Spjd } else { 1345219089Spjd rw_enter(&zc->zc_zap->zap_rwlock, RW_READER); 1346168404Spjd } 1347219089Spjd 1348219089Spjd zn = zap_name_alloc(zc->zc_zap, name, mt); 1349219089Spjd if (zn == NULL) { 1350219089Spjd rw_exit(&zc->zc_zap->zap_rwlock); 1351249195Smm return (SET_ERROR(ENOTSUP)); 1352219089Spjd } 1353219089Spjd 1354219089Spjd if (!zc->zc_zap->zap_ismicro) { 1355219089Spjd err = fzap_cursor_move_to_key(zc, zn); 1356219089Spjd } else { 1357219089Spjd mze = mze_find(zn); 1358219089Spjd if (mze == NULL) { 1359249195Smm err = SET_ERROR(ENOENT); 1360219089Spjd goto out; 1361219089Spjd } 1362219089Spjd zc->zc_hash = mze->mze_hash; 1363219089Spjd zc->zc_cd = mze->mze_cd; 1364219089Spjd } 1365219089Spjd 1366219089Spjdout: 1367219089Spjd zap_name_free(zn); 1368219089Spjd rw_exit(&zc->zc_zap->zap_rwlock); 1369219089Spjd return (err); 1370168404Spjd} 1371168404Spjd 1372168404Spjdint 1373168404Spjdzap_get_stats(objset_t *os, uint64_t zapobj, zap_stats_t *zs) 1374168404Spjd{ 1375168404Spjd int err; 1376168404Spjd zap_t *zap; 1377168404Spjd 1378185029Spjd err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); 1379168404Spjd if (err) 1380168404Spjd return (err); 1381168404Spjd 1382168404Spjd bzero(zs, sizeof (zap_stats_t)); 1383168404Spjd 1384168404Spjd if (zap->zap_ismicro) { 1385168404Spjd zs->zs_blocksize = zap->zap_dbuf->db_size; 1386168404Spjd zs->zs_num_entries = zap->zap_m.zap_num_entries; 1387168404Spjd zs->zs_num_blocks = 1; 1388168404Spjd } else { 1389168404Spjd fzap_get_stats(zap, zs); 1390168404Spjd } 1391168404Spjd zap_unlockdir(zap); 1392168404Spjd return (0); 1393168404Spjd} 1394209962Smm 1395209962Smmint 1396209962Smmzap_count_write(objset_t *os, uint64_t zapobj, const char *name, int add, 1397209962Smm uint64_t *towrite, uint64_t *tooverwrite) 1398209962Smm{ 1399209962Smm zap_t *zap; 1400209962Smm int err = 0; 1401209962Smm 1402209962Smm /* 1403209962Smm * Since, we don't have a name, we cannot figure out which blocks will 1404209962Smm * be affected in this operation. So, account for the worst case : 1405209962Smm * - 3 blocks overwritten: target leaf, ptrtbl block, header block 1406209962Smm * - 4 new blocks written if adding: 1407209962Smm * - 2 blocks for possibly split leaves, 1408209962Smm * - 2 grown ptrtbl blocks 1409209962Smm * 1410209962Smm * This also accomodates the case where an add operation to a fairly 1411209962Smm * large microzap results in a promotion to fatzap. 1412209962Smm */ 1413209962Smm if (name == NULL) { 1414274337Sdelphij *towrite += (3 + (add ? 4 : 0)) * SPA_OLD_MAXBLOCKSIZE; 1415209962Smm return (err); 1416209962Smm } 1417209962Smm 1418209962Smm /* 1419228103Smm * We lock the zap with adding == FALSE. Because, if we pass 1420209962Smm * the actual value of add, it could trigger a mzap_upgrade(). 1421209962Smm * At present we are just evaluating the possibility of this operation 1422209962Smm * and hence we donot want to trigger an upgrade. 1423209962Smm */ 1424209962Smm err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); 1425209962Smm if (err) 1426209962Smm return (err); 1427209962Smm 1428209962Smm if (!zap->zap_ismicro) { 1429209962Smm zap_name_t *zn = zap_name_alloc(zap, name, MT_EXACT); 1430209962Smm if (zn) { 1431209962Smm err = fzap_count_write(zn, add, towrite, 1432209962Smm tooverwrite); 1433209962Smm zap_name_free(zn); 1434209962Smm } else { 1435209962Smm /* 1436209962Smm * We treat this case as similar to (name == NULL) 1437209962Smm */ 1438274337Sdelphij *towrite += (3 + (add ? 4 : 0)) * SPA_OLD_MAXBLOCKSIZE; 1439209962Smm } 1440209962Smm } else { 1441209962Smm /* 1442209962Smm * We are here if (name != NULL) and this is a micro-zap. 1443209962Smm * We account for the header block depending on whether it 1444209962Smm * is freeable. 1445209962Smm * 1446209962Smm * Incase of an add-operation it is hard to find out 1447209962Smm * if this add will promote this microzap to fatzap. 1448209962Smm * Hence, we consider the worst case and account for the 1449209962Smm * blocks assuming this microzap would be promoted to a 1450209962Smm * fatzap. 1451209962Smm * 1452209962Smm * 1 block overwritten : header block 1453209962Smm * 4 new blocks written : 2 new split leaf, 2 grown 1454209962Smm * ptrtbl blocks 1455209962Smm */ 1456209962Smm if (dmu_buf_freeable(zap->zap_dbuf)) 1457274337Sdelphij *tooverwrite += MZAP_MAX_BLKSZ; 1458209962Smm else 1459274337Sdelphij *towrite += MZAP_MAX_BLKSZ; 1460209962Smm 1461209962Smm if (add) { 1462274337Sdelphij *towrite += 4 * MZAP_MAX_BLKSZ; 1463209962Smm } 1464209962Smm } 1465209962Smm 1466209962Smm zap_unlockdir(zap); 1467209962Smm return (err); 1468209962Smm} 1469