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. 24286575Smav * Copyright (c) 2014 Spectra Logic Corporation, All rights reserved. 25296519Smav * Copyright (c) 2014 Integros [integros.com] 26168404Spjd */ 27168404Spjd 28219089Spjd#include <sys/zio.h> 29168404Spjd#include <sys/spa.h> 30168404Spjd#include <sys/dmu.h> 31168404Spjd#include <sys/zfs_context.h> 32168404Spjd#include <sys/zap.h> 33168404Spjd#include <sys/refcount.h> 34168404Spjd#include <sys/zap_impl.h> 35168404Spjd#include <sys/zap_leaf.h> 36168404Spjd#include <sys/avl.h> 37219089Spjd#include <sys/arc.h> 38274337Sdelphij#include <sys/dmu_objset.h> 39168404Spjd 40185029Spjd#ifdef _KERNEL 41185029Spjd#include <sys/sunddi.h> 42185029Spjd#endif 43168404Spjd 44275782Sdelphijextern inline mzap_phys_t *zap_m_phys(zap_t *zap); 45275782Sdelphij 46219089Spjdstatic int mzap_upgrade(zap_t **zapp, dmu_tx_t *tx, zap_flags_t flags); 47168404Spjd 48219089Spjduint64_t 49219089Spjdzap_getflags(zap_t *zap) 50219089Spjd{ 51219089Spjd if (zap->zap_ismicro) 52219089Spjd return (0); 53275782Sdelphij return (zap_f_phys(zap)->zap_flags); 54219089Spjd} 55168404Spjd 56219089Spjdint 57219089Spjdzap_hashbits(zap_t *zap) 58219089Spjd{ 59219089Spjd if (zap_getflags(zap) & ZAP_FLAG_HASH64) 60219089Spjd return (48); 61219089Spjd else 62219089Spjd return (28); 63219089Spjd} 64219089Spjd 65219089Spjduint32_t 66219089Spjdzap_maxcd(zap_t *zap) 67219089Spjd{ 68219089Spjd if (zap_getflags(zap) & ZAP_FLAG_HASH64) 69219089Spjd return ((1<<16)-1); 70219089Spjd else 71219089Spjd return (-1U); 72219089Spjd} 73219089Spjd 74185029Spjdstatic uint64_t 75219089Spjdzap_hash(zap_name_t *zn) 76185029Spjd{ 77219089Spjd zap_t *zap = zn->zn_zap; 78219089Spjd uint64_t h = 0; 79185029Spjd 80219089Spjd if (zap_getflags(zap) & ZAP_FLAG_PRE_HASHED_KEY) { 81219089Spjd ASSERT(zap_getflags(zap) & ZAP_FLAG_UINT64_KEY); 82219089Spjd h = *(uint64_t *)zn->zn_key_orig; 83219089Spjd } else { 84219089Spjd h = zap->zap_salt; 85219089Spjd ASSERT(h != 0); 86219089Spjd ASSERT(zfs_crc64_table[128] == ZFS_CRC64_POLY); 87185029Spjd 88219089Spjd if (zap_getflags(zap) & ZAP_FLAG_UINT64_KEY) { 89219089Spjd int i; 90219089Spjd const uint64_t *wp = zn->zn_key_norm; 91219089Spjd 92219089Spjd ASSERT(zn->zn_key_intlen == 8); 93219089Spjd for (i = 0; i < zn->zn_key_norm_numints; wp++, i++) { 94219089Spjd int j; 95219089Spjd uint64_t word = *wp; 96219089Spjd 97219089Spjd for (j = 0; j < zn->zn_key_intlen; j++) { 98219089Spjd h = (h >> 8) ^ 99219089Spjd zfs_crc64_table[(h ^ word) & 0xFF]; 100219089Spjd word >>= NBBY; 101219089Spjd } 102219089Spjd } 103219089Spjd } else { 104219089Spjd int i, len; 105219089Spjd const uint8_t *cp = zn->zn_key_norm; 106219089Spjd 107219089Spjd /* 108219089Spjd * We previously stored the terminating null on 109219089Spjd * disk, but didn't hash it, so we need to 110219089Spjd * continue to not hash it. (The 111219089Spjd * zn_key_*_numints includes the terminating 112219089Spjd * null for non-binary keys.) 113219089Spjd */ 114219089Spjd len = zn->zn_key_norm_numints - 1; 115219089Spjd 116219089Spjd ASSERT(zn->zn_key_intlen == 1); 117219089Spjd for (i = 0; i < len; cp++, i++) { 118219089Spjd h = (h >> 8) ^ 119219089Spjd zfs_crc64_table[(h ^ *cp) & 0xFF]; 120219089Spjd } 121219089Spjd } 122185029Spjd } 123185029Spjd /* 124219089Spjd * Don't use all 64 bits, since we need some in the cookie for 125219089Spjd * the collision differentiator. We MUST use the high bits, 126219089Spjd * since those are the ones that we first pay attention to when 127185029Spjd * chosing the bucket. 128185029Spjd */ 129219089Spjd h &= ~((1ULL << (64 - zap_hashbits(zap))) - 1); 130185029Spjd 131219089Spjd return (h); 132185029Spjd} 133185029Spjd 134185029Spjdstatic int 135185029Spjdzap_normalize(zap_t *zap, const char *name, char *namenorm) 136185029Spjd{ 137185029Spjd size_t inlen, outlen; 138185029Spjd int err; 139185029Spjd 140219089Spjd ASSERT(!(zap_getflags(zap) & ZAP_FLAG_UINT64_KEY)); 141219089Spjd 142185029Spjd inlen = strlen(name) + 1; 143185029Spjd outlen = ZAP_MAXNAMELEN; 144185029Spjd 145185029Spjd err = 0; 146185029Spjd (void) u8_textprep_str((char *)name, &inlen, namenorm, &outlen, 147219089Spjd zap->zap_normflags | U8_TEXTPREP_IGNORE_NULL | 148219089Spjd U8_TEXTPREP_IGNORE_INVALID, U8_UNICODE_LATEST, &err); 149185029Spjd 150185029Spjd return (err); 151185029Spjd} 152185029Spjd 153185029Spjdboolean_t 154185029Spjdzap_match(zap_name_t *zn, const char *matchname) 155185029Spjd{ 156219089Spjd ASSERT(!(zap_getflags(zn->zn_zap) & ZAP_FLAG_UINT64_KEY)); 157219089Spjd 158185029Spjd if (zn->zn_matchtype == MT_FIRST) { 159185029Spjd char norm[ZAP_MAXNAMELEN]; 160185029Spjd 161185029Spjd if (zap_normalize(zn->zn_zap, matchname, norm) != 0) 162185029Spjd return (B_FALSE); 163185029Spjd 164219089Spjd return (strcmp(zn->zn_key_norm, norm) == 0); 165185029Spjd } else { 166185029Spjd /* MT_BEST or MT_EXACT */ 167219089Spjd return (strcmp(zn->zn_key_orig, matchname) == 0); 168185029Spjd } 169185029Spjd} 170185029Spjd 171185029Spjdvoid 172185029Spjdzap_name_free(zap_name_t *zn) 173185029Spjd{ 174185029Spjd kmem_free(zn, sizeof (zap_name_t)); 175185029Spjd} 176185029Spjd 177185029Spjdzap_name_t * 178219089Spjdzap_name_alloc(zap_t *zap, const char *key, matchtype_t mt) 179185029Spjd{ 180185029Spjd zap_name_t *zn = kmem_alloc(sizeof (zap_name_t), KM_SLEEP); 181185029Spjd 182185029Spjd zn->zn_zap = zap; 183219089Spjd zn->zn_key_intlen = sizeof (*key); 184219089Spjd zn->zn_key_orig = key; 185219089Spjd zn->zn_key_orig_numints = strlen(zn->zn_key_orig) + 1; 186185029Spjd zn->zn_matchtype = mt; 187185029Spjd if (zap->zap_normflags) { 188219089Spjd if (zap_normalize(zap, key, zn->zn_normbuf) != 0) { 189185029Spjd zap_name_free(zn); 190185029Spjd return (NULL); 191185029Spjd } 192219089Spjd zn->zn_key_norm = zn->zn_normbuf; 193219089Spjd zn->zn_key_norm_numints = strlen(zn->zn_key_norm) + 1; 194185029Spjd } else { 195185029Spjd if (mt != MT_EXACT) { 196185029Spjd zap_name_free(zn); 197185029Spjd return (NULL); 198185029Spjd } 199219089Spjd zn->zn_key_norm = zn->zn_key_orig; 200219089Spjd zn->zn_key_norm_numints = zn->zn_key_orig_numints; 201185029Spjd } 202185029Spjd 203219089Spjd zn->zn_hash = zap_hash(zn); 204185029Spjd return (zn); 205185029Spjd} 206185029Spjd 207219089Spjdzap_name_t * 208219089Spjdzap_name_alloc_uint64(zap_t *zap, const uint64_t *key, int numints) 209219089Spjd{ 210219089Spjd zap_name_t *zn = kmem_alloc(sizeof (zap_name_t), KM_SLEEP); 211219089Spjd 212219089Spjd ASSERT(zap->zap_normflags == 0); 213219089Spjd zn->zn_zap = zap; 214219089Spjd zn->zn_key_intlen = sizeof (*key); 215219089Spjd zn->zn_key_orig = zn->zn_key_norm = key; 216219089Spjd zn->zn_key_orig_numints = zn->zn_key_norm_numints = numints; 217219089Spjd zn->zn_matchtype = MT_EXACT; 218219089Spjd 219219089Spjd zn->zn_hash = zap_hash(zn); 220219089Spjd return (zn); 221219089Spjd} 222219089Spjd 223168404Spjdstatic void 224168404Spjdmzap_byteswap(mzap_phys_t *buf, size_t size) 225168404Spjd{ 226168404Spjd int i, max; 227168404Spjd buf->mz_block_type = BSWAP_64(buf->mz_block_type); 228168404Spjd buf->mz_salt = BSWAP_64(buf->mz_salt); 229185029Spjd buf->mz_normflags = BSWAP_64(buf->mz_normflags); 230168404Spjd max = (size / MZAP_ENT_LEN) - 1; 231168404Spjd for (i = 0; i < max; i++) { 232168404Spjd buf->mz_chunk[i].mze_value = 233168404Spjd BSWAP_64(buf->mz_chunk[i].mze_value); 234168404Spjd buf->mz_chunk[i].mze_cd = 235168404Spjd BSWAP_32(buf->mz_chunk[i].mze_cd); 236168404Spjd } 237168404Spjd} 238168404Spjd 239168404Spjdvoid 240168404Spjdzap_byteswap(void *buf, size_t size) 241168404Spjd{ 242168404Spjd uint64_t block_type; 243168404Spjd 244168404Spjd block_type = *(uint64_t *)buf; 245168404Spjd 246168404Spjd if (block_type == ZBT_MICRO || block_type == BSWAP_64(ZBT_MICRO)) { 247168404Spjd /* ASSERT(magic == ZAP_LEAF_MAGIC); */ 248168404Spjd mzap_byteswap(buf, size); 249168404Spjd } else { 250168404Spjd fzap_byteswap(buf, size); 251168404Spjd } 252168404Spjd} 253168404Spjd 254168404Spjdstatic int 255168404Spjdmze_compare(const void *arg1, const void *arg2) 256168404Spjd{ 257168404Spjd const mzap_ent_t *mze1 = arg1; 258168404Spjd const mzap_ent_t *mze2 = arg2; 259168404Spjd 260168404Spjd if (mze1->mze_hash > mze2->mze_hash) 261168404Spjd return (+1); 262168404Spjd if (mze1->mze_hash < mze2->mze_hash) 263168404Spjd return (-1); 264219089Spjd if (mze1->mze_cd > mze2->mze_cd) 265168404Spjd return (+1); 266219089Spjd if (mze1->mze_cd < mze2->mze_cd) 267168404Spjd return (-1); 268168404Spjd return (0); 269168404Spjd} 270168404Spjd 271197150Spjdstatic int 272219089Spjdmze_insert(zap_t *zap, int chunkid, uint64_t hash) 273168404Spjd{ 274168404Spjd mzap_ent_t *mze; 275197150Spjd avl_index_t idx; 276168404Spjd 277168404Spjd ASSERT(zap->zap_ismicro); 278168404Spjd ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 279168404Spjd 280168404Spjd mze = kmem_alloc(sizeof (mzap_ent_t), KM_SLEEP); 281168404Spjd mze->mze_chunkid = chunkid; 282168404Spjd mze->mze_hash = hash; 283219089Spjd mze->mze_cd = MZE_PHYS(zap, mze)->mze_cd; 284219089Spjd ASSERT(MZE_PHYS(zap, mze)->mze_name[0] != 0); 285197150Spjd if (avl_find(&zap->zap_m.zap_avl, mze, &idx) != NULL) { 286197150Spjd kmem_free(mze, sizeof (mzap_ent_t)); 287197150Spjd return (EEXIST); 288197150Spjd } 289197150Spjd avl_insert(&zap->zap_m.zap_avl, mze, idx); 290197150Spjd return (0); 291168404Spjd} 292168404Spjd 293168404Spjdstatic mzap_ent_t * 294185029Spjdmze_find(zap_name_t *zn) 295168404Spjd{ 296168404Spjd mzap_ent_t mze_tofind; 297168404Spjd mzap_ent_t *mze; 298168404Spjd avl_index_t idx; 299185029Spjd avl_tree_t *avl = &zn->zn_zap->zap_m.zap_avl; 300168404Spjd 301185029Spjd ASSERT(zn->zn_zap->zap_ismicro); 302185029Spjd ASSERT(RW_LOCK_HELD(&zn->zn_zap->zap_rwlock)); 303168404Spjd 304185029Spjd mze_tofind.mze_hash = zn->zn_hash; 305219089Spjd mze_tofind.mze_cd = 0; 306168404Spjd 307185029Spjdagain: 308168404Spjd mze = avl_find(avl, &mze_tofind, &idx); 309168404Spjd if (mze == NULL) 310168404Spjd mze = avl_nearest(avl, idx, AVL_AFTER); 311185029Spjd for (; mze && mze->mze_hash == zn->zn_hash; mze = AVL_NEXT(avl, mze)) { 312219089Spjd ASSERT3U(mze->mze_cd, ==, MZE_PHYS(zn->zn_zap, mze)->mze_cd); 313219089Spjd if (zap_match(zn, MZE_PHYS(zn->zn_zap, mze)->mze_name)) 314168404Spjd return (mze); 315168404Spjd } 316185029Spjd if (zn->zn_matchtype == MT_BEST) { 317185029Spjd zn->zn_matchtype = MT_FIRST; 318185029Spjd goto again; 319185029Spjd } 320168404Spjd return (NULL); 321168404Spjd} 322168404Spjd 323168404Spjdstatic uint32_t 324168404Spjdmze_find_unused_cd(zap_t *zap, uint64_t hash) 325168404Spjd{ 326168404Spjd mzap_ent_t mze_tofind; 327168404Spjd mzap_ent_t *mze; 328168404Spjd avl_index_t idx; 329168404Spjd avl_tree_t *avl = &zap->zap_m.zap_avl; 330168404Spjd uint32_t cd; 331168404Spjd 332168404Spjd ASSERT(zap->zap_ismicro); 333168404Spjd ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 334168404Spjd 335168404Spjd mze_tofind.mze_hash = hash; 336219089Spjd mze_tofind.mze_cd = 0; 337168404Spjd 338168404Spjd cd = 0; 339168404Spjd for (mze = avl_find(avl, &mze_tofind, &idx); 340168404Spjd mze && mze->mze_hash == hash; mze = AVL_NEXT(avl, mze)) { 341219089Spjd if (mze->mze_cd != cd) 342168404Spjd break; 343168404Spjd cd++; 344168404Spjd } 345168404Spjd 346168404Spjd return (cd); 347168404Spjd} 348168404Spjd 349168404Spjdstatic void 350168404Spjdmze_remove(zap_t *zap, mzap_ent_t *mze) 351168404Spjd{ 352168404Spjd ASSERT(zap->zap_ismicro); 353168404Spjd ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 354168404Spjd 355168404Spjd avl_remove(&zap->zap_m.zap_avl, mze); 356168404Spjd kmem_free(mze, sizeof (mzap_ent_t)); 357168404Spjd} 358168404Spjd 359168404Spjdstatic void 360168404Spjdmze_destroy(zap_t *zap) 361168404Spjd{ 362168404Spjd mzap_ent_t *mze; 363168404Spjd void *avlcookie = NULL; 364168404Spjd 365168404Spjd while (mze = avl_destroy_nodes(&zap->zap_m.zap_avl, &avlcookie)) 366168404Spjd kmem_free(mze, sizeof (mzap_ent_t)); 367168404Spjd avl_destroy(&zap->zap_m.zap_avl); 368168404Spjd} 369168404Spjd 370168404Spjdstatic zap_t * 371168404Spjdmzap_open(objset_t *os, uint64_t obj, dmu_buf_t *db) 372168404Spjd{ 373168404Spjd zap_t *winner; 374168404Spjd zap_t *zap; 375168404Spjd int i; 376299439Smav uint64_t *zap_hdr = (uint64_t *)db->db_data; 377299439Smav uint64_t zap_block_type = zap_hdr[0]; 378299439Smav uint64_t zap_magic = zap_hdr[1]; 379168404Spjd 380168404Spjd ASSERT3U(MZAP_ENT_LEN, ==, sizeof (mzap_ent_phys_t)); 381168404Spjd 382168404Spjd zap = kmem_zalloc(sizeof (zap_t), KM_SLEEP); 383219089Spjd rw_init(&zap->zap_rwlock, 0, 0, 0); 384168404Spjd rw_enter(&zap->zap_rwlock, RW_WRITER); 385168404Spjd zap->zap_objset = os; 386168404Spjd zap->zap_object = obj; 387168404Spjd zap->zap_dbuf = db; 388168404Spjd 389299439Smav if (zap_block_type != ZBT_MICRO) { 390219089Spjd mutex_init(&zap->zap_f.zap_num_entries_mtx, 0, 0, 0); 391264669Sdelphij zap->zap_f.zap_block_shift = highbit64(db->db_size) - 1; 392299439Smav if (zap_block_type != ZBT_HEADER || zap_magic != ZAP_MAGIC) { 393299439Smav winner = NULL; /* No actual winner here... */ 394299439Smav goto handle_winner; 395299439Smav } 396168404Spjd } else { 397168404Spjd zap->zap_ismicro = TRUE; 398168404Spjd } 399168404Spjd 400168404Spjd /* 401168404Spjd * Make sure that zap_ismicro is set before we let others see 402168404Spjd * it, because zap_lockdir() checks zap_ismicro without the lock 403168404Spjd * held. 404168404Spjd */ 405286575Smav dmu_buf_init_user(&zap->zap_dbu, zap_evict, &zap->zap_dbuf); 406286575Smav winner = dmu_buf_set_user(db, &zap->zap_dbu); 407168404Spjd 408299439Smav if (winner != NULL) 409299439Smav goto handle_winner; 410168404Spjd 411168404Spjd if (zap->zap_ismicro) { 412275782Sdelphij zap->zap_salt = zap_m_phys(zap)->mz_salt; 413275782Sdelphij zap->zap_normflags = zap_m_phys(zap)->mz_normflags; 414168404Spjd zap->zap_m.zap_num_chunks = db->db_size / MZAP_ENT_LEN - 1; 415168404Spjd avl_create(&zap->zap_m.zap_avl, mze_compare, 416168404Spjd sizeof (mzap_ent_t), offsetof(mzap_ent_t, mze_node)); 417168404Spjd 418168404Spjd for (i = 0; i < zap->zap_m.zap_num_chunks; i++) { 419168404Spjd mzap_ent_phys_t *mze = 420275782Sdelphij &zap_m_phys(zap)->mz_chunk[i]; 421168404Spjd if (mze->mze_name[0]) { 422185029Spjd zap_name_t *zn; 423185029Spjd 424185029Spjd zn = zap_name_alloc(zap, mze->mze_name, 425185029Spjd MT_EXACT); 426219089Spjd if (mze_insert(zap, i, zn->zn_hash) == 0) 427197150Spjd zap->zap_m.zap_num_entries++; 428197150Spjd else { 429197150Spjd printf("ZFS WARNING: Duplicated ZAP " 430197172Spjd "entry detected (%s).\n", 431197150Spjd mze->mze_name); 432197150Spjd } 433185029Spjd zap_name_free(zn); 434168404Spjd } 435168404Spjd } 436168404Spjd } else { 437275782Sdelphij zap->zap_salt = zap_f_phys(zap)->zap_salt; 438275782Sdelphij zap->zap_normflags = zap_f_phys(zap)->zap_normflags; 439168404Spjd 440168404Spjd ASSERT3U(sizeof (struct zap_leaf_header), ==, 441168404Spjd 2*ZAP_LEAF_CHUNKSIZE); 442168404Spjd 443168404Spjd /* 444168404Spjd * The embedded pointer table should not overlap the 445168404Spjd * other members. 446168404Spjd */ 447168404Spjd ASSERT3P(&ZAP_EMBEDDED_PTRTBL_ENT(zap, 0), >, 448275782Sdelphij &zap_f_phys(zap)->zap_salt); 449168404Spjd 450168404Spjd /* 451168404Spjd * The embedded pointer table should end at the end of 452168404Spjd * the block 453168404Spjd */ 454168404Spjd ASSERT3U((uintptr_t)&ZAP_EMBEDDED_PTRTBL_ENT(zap, 455168404Spjd 1<<ZAP_EMBEDDED_PTRTBL_SHIFT(zap)) - 456275782Sdelphij (uintptr_t)zap_f_phys(zap), ==, 457168404Spjd zap->zap_dbuf->db_size); 458168404Spjd } 459168404Spjd rw_exit(&zap->zap_rwlock); 460168404Spjd return (zap); 461299439Smav 462299439Smavhandle_winner: 463299439Smav rw_exit(&zap->zap_rwlock); 464299439Smav rw_destroy(&zap->zap_rwlock); 465299439Smav if (!zap->zap_ismicro) 466299439Smav mutex_destroy(&zap->zap_f.zap_num_entries_mtx); 467299439Smav kmem_free(zap, sizeof (zap_t)); 468299439Smav return (winner); 469168404Spjd} 470168404Spjd 471168404Spjdint 472168404Spjdzap_lockdir(objset_t *os, uint64_t obj, dmu_tx_t *tx, 473185029Spjd krw_t lti, boolean_t fatreader, boolean_t adding, zap_t **zapp) 474168404Spjd{ 475168404Spjd zap_t *zap; 476168404Spjd dmu_buf_t *db; 477168404Spjd krw_t lt; 478168404Spjd int err; 479168404Spjd 480168404Spjd *zapp = NULL; 481168404Spjd 482219089Spjd err = dmu_buf_hold(os, obj, 0, NULL, &db, DMU_READ_NO_PREFETCH); 483168404Spjd if (err) 484168404Spjd return (err); 485168404Spjd 486168404Spjd#ifdef ZFS_DEBUG 487168404Spjd { 488168404Spjd dmu_object_info_t doi; 489168404Spjd dmu_object_info_from_db(db, &doi); 490236884Smm ASSERT3U(DMU_OT_BYTESWAP(doi.doi_type), ==, DMU_BSWAP_ZAP); 491168404Spjd } 492168404Spjd#endif 493168404Spjd 494168404Spjd zap = dmu_buf_get_user(db); 495299439Smav if (zap == NULL) { 496168404Spjd zap = mzap_open(os, obj, db); 497299439Smav if (zap == NULL) { 498299439Smav /* 499299439Smav * mzap_open() didn't like what it saw on-disk. 500299439Smav * Check for corruption! 501299439Smav */ 502299439Smav dmu_buf_rele(db, NULL); 503299439Smav return (SET_ERROR(EIO)); 504299439Smav } 505299439Smav } 506168404Spjd 507168404Spjd /* 508168404Spjd * We're checking zap_ismicro without the lock held, in order to 509168404Spjd * tell what type of lock we want. Once we have some sort of 510168404Spjd * lock, see if it really is the right type. In practice this 511168404Spjd * can only be different if it was upgraded from micro to fat, 512168404Spjd * and micro wanted WRITER but fat only needs READER. 513168404Spjd */ 514168404Spjd lt = (!zap->zap_ismicro && fatreader) ? RW_READER : lti; 515168404Spjd rw_enter(&zap->zap_rwlock, lt); 516168404Spjd if (lt != ((!zap->zap_ismicro && fatreader) ? RW_READER : lti)) { 517168404Spjd /* it was upgraded, now we only need reader */ 518168404Spjd ASSERT(lt == RW_WRITER); 519168404Spjd ASSERT(RW_READER == 520168404Spjd (!zap->zap_ismicro && fatreader) ? RW_READER : lti); 521168404Spjd rw_downgrade(&zap->zap_rwlock); 522168404Spjd lt = RW_READER; 523168404Spjd } 524168404Spjd 525168404Spjd zap->zap_objset = os; 526168404Spjd 527168404Spjd if (lt == RW_WRITER) 528168404Spjd dmu_buf_will_dirty(db, tx); 529168404Spjd 530168404Spjd ASSERT3P(zap->zap_dbuf, ==, db); 531168404Spjd 532168404Spjd ASSERT(!zap->zap_ismicro || 533168404Spjd zap->zap_m.zap_num_entries <= zap->zap_m.zap_num_chunks); 534185029Spjd if (zap->zap_ismicro && tx && adding && 535168404Spjd zap->zap_m.zap_num_entries == zap->zap_m.zap_num_chunks) { 536168404Spjd uint64_t newsz = db->db_size + SPA_MINBLOCKSIZE; 537168404Spjd if (newsz > MZAP_MAX_BLKSZ) { 538168404Spjd dprintf("upgrading obj %llu: num_entries=%u\n", 539168404Spjd obj, zap->zap_m.zap_num_entries); 540168404Spjd *zapp = zap; 541219089Spjd return (mzap_upgrade(zapp, tx, 0)); 542168404Spjd } 543168404Spjd err = dmu_object_set_blocksize(os, obj, newsz, 0, tx); 544240415Smm ASSERT0(err); 545168404Spjd zap->zap_m.zap_num_chunks = 546168404Spjd db->db_size / MZAP_ENT_LEN - 1; 547168404Spjd } 548168404Spjd 549168404Spjd *zapp = zap; 550168404Spjd return (0); 551168404Spjd} 552168404Spjd 553168404Spjdvoid 554168404Spjdzap_unlockdir(zap_t *zap) 555168404Spjd{ 556168404Spjd rw_exit(&zap->zap_rwlock); 557168404Spjd dmu_buf_rele(zap->zap_dbuf, NULL); 558168404Spjd} 559168404Spjd 560185029Spjdstatic int 561219089Spjdmzap_upgrade(zap_t **zapp, dmu_tx_t *tx, zap_flags_t flags) 562168404Spjd{ 563168404Spjd mzap_phys_t *mzp; 564219089Spjd int i, sz, nchunks; 565219089Spjd int err = 0; 566185029Spjd zap_t *zap = *zapp; 567168404Spjd 568168404Spjd ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 569168404Spjd 570168404Spjd sz = zap->zap_dbuf->db_size; 571286556Smav mzp = zio_buf_alloc(sz); 572168404Spjd bcopy(zap->zap_dbuf->db_data, mzp, sz); 573168404Spjd nchunks = zap->zap_m.zap_num_chunks; 574168404Spjd 575219089Spjd if (!flags) { 576219089Spjd err = dmu_object_set_blocksize(zap->zap_objset, zap->zap_object, 577219089Spjd 1ULL << fzap_default_block_shift, 0, tx); 578219089Spjd if (err) { 579286556Smav zio_buf_free(mzp, sz); 580219089Spjd return (err); 581219089Spjd } 582185029Spjd } 583168404Spjd 584168404Spjd dprintf("upgrading obj=%llu with %u chunks\n", 585168404Spjd zap->zap_object, nchunks); 586185029Spjd /* XXX destroy the avl later, so we can use the stored hash value */ 587168404Spjd mze_destroy(zap); 588168404Spjd 589219089Spjd fzap_upgrade(zap, tx, flags); 590168404Spjd 591168404Spjd for (i = 0; i < nchunks; i++) { 592168404Spjd mzap_ent_phys_t *mze = &mzp->mz_chunk[i]; 593185029Spjd zap_name_t *zn; 594168404Spjd if (mze->mze_name[0] == 0) 595168404Spjd continue; 596168404Spjd dprintf("adding %s=%llu\n", 597168404Spjd mze->mze_name, mze->mze_value); 598185029Spjd zn = zap_name_alloc(zap, mze->mze_name, MT_EXACT); 599185029Spjd err = fzap_add_cd(zn, 8, 1, &mze->mze_value, mze->mze_cd, tx); 600185029Spjd zap = zn->zn_zap; /* fzap_add_cd() may change zap */ 601185029Spjd zap_name_free(zn); 602185029Spjd if (err) 603185029Spjd break; 604168404Spjd } 605286556Smav zio_buf_free(mzp, sz); 606185029Spjd *zapp = zap; 607185029Spjd return (err); 608168404Spjd} 609168404Spjd 610259813Sdelphijvoid 611219089Spjdmzap_create_impl(objset_t *os, uint64_t obj, int normflags, zap_flags_t flags, 612219089Spjd dmu_tx_t *tx) 613168404Spjd{ 614168404Spjd dmu_buf_t *db; 615168404Spjd mzap_phys_t *zp; 616168404Spjd 617219089Spjd VERIFY(0 == dmu_buf_hold(os, obj, 0, FTAG, &db, DMU_READ_NO_PREFETCH)); 618168404Spjd 619168404Spjd#ifdef ZFS_DEBUG 620168404Spjd { 621168404Spjd dmu_object_info_t doi; 622168404Spjd dmu_object_info_from_db(db, &doi); 623236884Smm ASSERT3U(DMU_OT_BYTESWAP(doi.doi_type), ==, DMU_BSWAP_ZAP); 624168404Spjd } 625168404Spjd#endif 626168404Spjd 627168404Spjd dmu_buf_will_dirty(db, tx); 628168404Spjd zp = db->db_data; 629168404Spjd zp->mz_block_type = ZBT_MICRO; 630168404Spjd zp->mz_salt = ((uintptr_t)db ^ (uintptr_t)tx ^ (obj << 1)) | 1ULL; 631185029Spjd zp->mz_normflags = normflags; 632168404Spjd dmu_buf_rele(db, FTAG); 633219089Spjd 634219089Spjd if (flags != 0) { 635219089Spjd zap_t *zap; 636219089Spjd /* Only fat zap supports flags; upgrade immediately. */ 637219089Spjd VERIFY(0 == zap_lockdir(os, obj, tx, RW_WRITER, 638219089Spjd B_FALSE, B_FALSE, &zap)); 639219089Spjd VERIFY3U(0, ==, mzap_upgrade(&zap, tx, flags)); 640219089Spjd zap_unlockdir(zap); 641219089Spjd } 642168404Spjd} 643168404Spjd 644168404Spjdint 645168404Spjdzap_create_claim(objset_t *os, uint64_t obj, dmu_object_type_t ot, 646168404Spjd dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) 647168404Spjd{ 648185029Spjd return (zap_create_claim_norm(os, obj, 649185029Spjd 0, ot, bonustype, bonuslen, tx)); 650185029Spjd} 651185029Spjd 652185029Spjdint 653185029Spjdzap_create_claim_norm(objset_t *os, uint64_t obj, int normflags, 654185029Spjd dmu_object_type_t ot, 655185029Spjd dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) 656185029Spjd{ 657168404Spjd int err; 658168404Spjd 659168404Spjd err = dmu_object_claim(os, obj, ot, 0, bonustype, bonuslen, tx); 660168404Spjd if (err != 0) 661168404Spjd return (err); 662219089Spjd mzap_create_impl(os, obj, normflags, 0, tx); 663168404Spjd return (0); 664168404Spjd} 665168404Spjd 666168404Spjduint64_t 667168404Spjdzap_create(objset_t *os, dmu_object_type_t ot, 668168404Spjd dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) 669168404Spjd{ 670185029Spjd return (zap_create_norm(os, 0, ot, bonustype, bonuslen, tx)); 671185029Spjd} 672185029Spjd 673185029Spjduint64_t 674185029Spjdzap_create_norm(objset_t *os, int normflags, dmu_object_type_t ot, 675185029Spjd dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) 676185029Spjd{ 677168404Spjd uint64_t obj = dmu_object_alloc(os, ot, 0, bonustype, bonuslen, tx); 678168404Spjd 679219089Spjd mzap_create_impl(os, obj, normflags, 0, tx); 680168404Spjd return (obj); 681168404Spjd} 682168404Spjd 683219089Spjduint64_t 684219089Spjdzap_create_flags(objset_t *os, int normflags, zap_flags_t flags, 685219089Spjd dmu_object_type_t ot, int leaf_blockshift, int indirect_blockshift, 686219089Spjd dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) 687219089Spjd{ 688219089Spjd uint64_t obj = dmu_object_alloc(os, ot, 0, bonustype, bonuslen, tx); 689219089Spjd 690219089Spjd ASSERT(leaf_blockshift >= SPA_MINBLOCKSHIFT && 691274337Sdelphij leaf_blockshift <= SPA_OLD_MAXBLOCKSHIFT && 692219089Spjd indirect_blockshift >= SPA_MINBLOCKSHIFT && 693274337Sdelphij indirect_blockshift <= SPA_OLD_MAXBLOCKSHIFT); 694219089Spjd 695219089Spjd VERIFY(dmu_object_set_blocksize(os, obj, 696219089Spjd 1ULL << leaf_blockshift, indirect_blockshift, tx) == 0); 697219089Spjd 698219089Spjd mzap_create_impl(os, obj, normflags, flags, tx); 699219089Spjd return (obj); 700219089Spjd} 701219089Spjd 702168404Spjdint 703168404Spjdzap_destroy(objset_t *os, uint64_t zapobj, dmu_tx_t *tx) 704168404Spjd{ 705168404Spjd /* 706168404Spjd * dmu_object_free will free the object number and free the 707168404Spjd * data. Freeing the data will cause our pageout function to be 708168404Spjd * called, which will destroy our data (zap_leaf_t's and zap_t). 709168404Spjd */ 710168404Spjd 711168404Spjd return (dmu_object_free(os, zapobj, tx)); 712168404Spjd} 713168404Spjd 714168404Spjdvoid 715286575Smavzap_evict(void *dbu) 716168404Spjd{ 717286575Smav zap_t *zap = dbu; 718168404Spjd 719168404Spjd rw_destroy(&zap->zap_rwlock); 720168404Spjd 721168404Spjd if (zap->zap_ismicro) 722168404Spjd mze_destroy(zap); 723168404Spjd else 724168404Spjd mutex_destroy(&zap->zap_f.zap_num_entries_mtx); 725168404Spjd 726168404Spjd kmem_free(zap, sizeof (zap_t)); 727168404Spjd} 728168404Spjd 729168404Spjdint 730168404Spjdzap_count(objset_t *os, uint64_t zapobj, uint64_t *count) 731168404Spjd{ 732168404Spjd zap_t *zap; 733168404Spjd int err; 734168404Spjd 735185029Spjd err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); 736168404Spjd if (err) 737168404Spjd return (err); 738168404Spjd if (!zap->zap_ismicro) { 739168404Spjd err = fzap_count(zap, count); 740168404Spjd } else { 741168404Spjd *count = zap->zap_m.zap_num_entries; 742168404Spjd } 743168404Spjd zap_unlockdir(zap); 744168404Spjd return (err); 745168404Spjd} 746168404Spjd 747168404Spjd/* 748185029Spjd * zn may be NULL; if not specified, it will be computed if needed. 749185029Spjd * See also the comment above zap_entry_normalization_conflict(). 750168404Spjd */ 751185029Spjdstatic boolean_t 752185029Spjdmzap_normalization_conflict(zap_t *zap, zap_name_t *zn, mzap_ent_t *mze) 753185029Spjd{ 754185029Spjd mzap_ent_t *other; 755185029Spjd int direction = AVL_BEFORE; 756185029Spjd boolean_t allocdzn = B_FALSE; 757168404Spjd 758185029Spjd if (zap->zap_normflags == 0) 759185029Spjd return (B_FALSE); 760185029Spjd 761185029Spjdagain: 762185029Spjd for (other = avl_walk(&zap->zap_m.zap_avl, mze, direction); 763185029Spjd other && other->mze_hash == mze->mze_hash; 764185029Spjd other = avl_walk(&zap->zap_m.zap_avl, other, direction)) { 765185029Spjd 766185029Spjd if (zn == NULL) { 767219089Spjd zn = zap_name_alloc(zap, MZE_PHYS(zap, mze)->mze_name, 768185029Spjd MT_FIRST); 769185029Spjd allocdzn = B_TRUE; 770185029Spjd } 771219089Spjd if (zap_match(zn, MZE_PHYS(zap, other)->mze_name)) { 772185029Spjd if (allocdzn) 773185029Spjd zap_name_free(zn); 774185029Spjd return (B_TRUE); 775185029Spjd } 776185029Spjd } 777185029Spjd 778185029Spjd if (direction == AVL_BEFORE) { 779185029Spjd direction = AVL_AFTER; 780185029Spjd goto again; 781185029Spjd } 782185029Spjd 783185029Spjd if (allocdzn) 784185029Spjd zap_name_free(zn); 785185029Spjd return (B_FALSE); 786185029Spjd} 787185029Spjd 788185029Spjd/* 789185029Spjd * Routines for manipulating attributes. 790185029Spjd */ 791185029Spjd 792168404Spjdint 793168404Spjdzap_lookup(objset_t *os, uint64_t zapobj, const char *name, 794168404Spjd uint64_t integer_size, uint64_t num_integers, void *buf) 795168404Spjd{ 796185029Spjd return (zap_lookup_norm(os, zapobj, name, integer_size, 797185029Spjd num_integers, buf, MT_EXACT, NULL, 0, NULL)); 798185029Spjd} 799185029Spjd 800185029Spjdint 801185029Spjdzap_lookup_norm(objset_t *os, uint64_t zapobj, const char *name, 802185029Spjd uint64_t integer_size, uint64_t num_integers, void *buf, 803185029Spjd matchtype_t mt, char *realname, int rn_len, 804185029Spjd boolean_t *ncp) 805185029Spjd{ 806168404Spjd zap_t *zap; 807168404Spjd int err; 808168404Spjd mzap_ent_t *mze; 809185029Spjd zap_name_t *zn; 810168404Spjd 811185029Spjd err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); 812168404Spjd if (err) 813168404Spjd return (err); 814185029Spjd zn = zap_name_alloc(zap, name, mt); 815185029Spjd if (zn == NULL) { 816185029Spjd zap_unlockdir(zap); 817249195Smm return (SET_ERROR(ENOTSUP)); 818185029Spjd } 819185029Spjd 820168404Spjd if (!zap->zap_ismicro) { 821185029Spjd err = fzap_lookup(zn, integer_size, num_integers, buf, 822185029Spjd realname, rn_len, ncp); 823168404Spjd } else { 824185029Spjd mze = mze_find(zn); 825168404Spjd if (mze == NULL) { 826249195Smm err = SET_ERROR(ENOENT); 827168404Spjd } else { 828185029Spjd if (num_integers < 1) { 829249195Smm err = SET_ERROR(EOVERFLOW); 830185029Spjd } else if (integer_size != 8) { 831249195Smm err = SET_ERROR(EINVAL); 832185029Spjd } else { 833219089Spjd *(uint64_t *)buf = 834219089Spjd MZE_PHYS(zap, mze)->mze_value; 835185029Spjd (void) strlcpy(realname, 836219089Spjd MZE_PHYS(zap, mze)->mze_name, rn_len); 837185029Spjd if (ncp) { 838185029Spjd *ncp = mzap_normalization_conflict(zap, 839185029Spjd zn, mze); 840185029Spjd } 841185029Spjd } 842168404Spjd } 843168404Spjd } 844185029Spjd zap_name_free(zn); 845168404Spjd zap_unlockdir(zap); 846168404Spjd return (err); 847168404Spjd} 848168404Spjd 849168404Spjdint 850219089Spjdzap_prefetch_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, 851219089Spjd int key_numints) 852219089Spjd{ 853219089Spjd zap_t *zap; 854219089Spjd int err; 855219089Spjd zap_name_t *zn; 856219089Spjd 857219089Spjd err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); 858219089Spjd if (err) 859219089Spjd return (err); 860219089Spjd zn = zap_name_alloc_uint64(zap, key, key_numints); 861219089Spjd if (zn == NULL) { 862219089Spjd zap_unlockdir(zap); 863249195Smm return (SET_ERROR(ENOTSUP)); 864219089Spjd } 865219089Spjd 866219089Spjd fzap_prefetch(zn); 867219089Spjd zap_name_free(zn); 868219089Spjd zap_unlockdir(zap); 869219089Spjd return (err); 870219089Spjd} 871219089Spjd 872219089Spjdint 873219089Spjdzap_lookup_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, 874219089Spjd int key_numints, uint64_t integer_size, uint64_t num_integers, void *buf) 875219089Spjd{ 876219089Spjd zap_t *zap; 877219089Spjd int err; 878219089Spjd zap_name_t *zn; 879219089Spjd 880219089Spjd err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); 881219089Spjd if (err) 882219089Spjd return (err); 883219089Spjd zn = zap_name_alloc_uint64(zap, key, key_numints); 884219089Spjd if (zn == NULL) { 885219089Spjd zap_unlockdir(zap); 886249195Smm return (SET_ERROR(ENOTSUP)); 887219089Spjd } 888219089Spjd 889219089Spjd err = fzap_lookup(zn, integer_size, num_integers, buf, 890219089Spjd NULL, 0, NULL); 891219089Spjd zap_name_free(zn); 892219089Spjd zap_unlockdir(zap); 893219089Spjd return (err); 894219089Spjd} 895219089Spjd 896219089Spjdint 897219089Spjdzap_contains(objset_t *os, uint64_t zapobj, const char *name) 898219089Spjd{ 899259813Sdelphij int err = zap_lookup_norm(os, zapobj, name, 0, 900259813Sdelphij 0, NULL, MT_EXACT, NULL, 0, NULL); 901219089Spjd if (err == EOVERFLOW || err == EINVAL) 902219089Spjd err = 0; /* found, but skipped reading the value */ 903219089Spjd return (err); 904219089Spjd} 905219089Spjd 906219089Spjdint 907168404Spjdzap_length(objset_t *os, uint64_t zapobj, const char *name, 908168404Spjd uint64_t *integer_size, uint64_t *num_integers) 909168404Spjd{ 910168404Spjd zap_t *zap; 911168404Spjd int err; 912168404Spjd mzap_ent_t *mze; 913185029Spjd zap_name_t *zn; 914168404Spjd 915185029Spjd err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); 916168404Spjd if (err) 917168404Spjd return (err); 918185029Spjd zn = zap_name_alloc(zap, name, MT_EXACT); 919185029Spjd if (zn == NULL) { 920185029Spjd zap_unlockdir(zap); 921249195Smm return (SET_ERROR(ENOTSUP)); 922185029Spjd } 923168404Spjd if (!zap->zap_ismicro) { 924185029Spjd err = fzap_length(zn, integer_size, num_integers); 925168404Spjd } else { 926185029Spjd mze = mze_find(zn); 927168404Spjd if (mze == NULL) { 928249195Smm err = SET_ERROR(ENOENT); 929168404Spjd } else { 930168404Spjd if (integer_size) 931168404Spjd *integer_size = 8; 932168404Spjd if (num_integers) 933168404Spjd *num_integers = 1; 934168404Spjd } 935168404Spjd } 936185029Spjd zap_name_free(zn); 937168404Spjd zap_unlockdir(zap); 938168404Spjd return (err); 939168404Spjd} 940168404Spjd 941219089Spjdint 942219089Spjdzap_length_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, 943219089Spjd int key_numints, uint64_t *integer_size, uint64_t *num_integers) 944219089Spjd{ 945219089Spjd zap_t *zap; 946219089Spjd int err; 947219089Spjd zap_name_t *zn; 948219089Spjd 949219089Spjd err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); 950219089Spjd if (err) 951219089Spjd return (err); 952219089Spjd zn = zap_name_alloc_uint64(zap, key, key_numints); 953219089Spjd if (zn == NULL) { 954219089Spjd zap_unlockdir(zap); 955249195Smm return (SET_ERROR(ENOTSUP)); 956219089Spjd } 957219089Spjd err = fzap_length(zn, integer_size, num_integers); 958219089Spjd zap_name_free(zn); 959219089Spjd zap_unlockdir(zap); 960219089Spjd return (err); 961219089Spjd} 962219089Spjd 963168404Spjdstatic void 964185029Spjdmzap_addent(zap_name_t *zn, uint64_t value) 965168404Spjd{ 966168404Spjd int i; 967185029Spjd zap_t *zap = zn->zn_zap; 968168404Spjd int start = zap->zap_m.zap_alloc_next; 969168404Spjd uint32_t cd; 970168404Spjd 971168404Spjd ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 972168404Spjd 973168404Spjd#ifdef ZFS_DEBUG 974168404Spjd for (i = 0; i < zap->zap_m.zap_num_chunks; i++) { 975275782Sdelphij mzap_ent_phys_t *mze = &zap_m_phys(zap)->mz_chunk[i]; 976219089Spjd ASSERT(strcmp(zn->zn_key_orig, mze->mze_name) != 0); 977168404Spjd } 978168404Spjd#endif 979168404Spjd 980185029Spjd cd = mze_find_unused_cd(zap, zn->zn_hash); 981168404Spjd /* given the limited size of the microzap, this can't happen */ 982219089Spjd ASSERT(cd < zap_maxcd(zap)); 983168404Spjd 984168404Spjdagain: 985168404Spjd for (i = start; i < zap->zap_m.zap_num_chunks; i++) { 986275782Sdelphij mzap_ent_phys_t *mze = &zap_m_phys(zap)->mz_chunk[i]; 987168404Spjd if (mze->mze_name[0] == 0) { 988168404Spjd mze->mze_value = value; 989168404Spjd mze->mze_cd = cd; 990219089Spjd (void) strcpy(mze->mze_name, zn->zn_key_orig); 991168404Spjd zap->zap_m.zap_num_entries++; 992168404Spjd zap->zap_m.zap_alloc_next = i+1; 993168404Spjd if (zap->zap_m.zap_alloc_next == 994168404Spjd zap->zap_m.zap_num_chunks) 995168404Spjd zap->zap_m.zap_alloc_next = 0; 996219089Spjd VERIFY(0 == mze_insert(zap, i, zn->zn_hash)); 997168404Spjd return; 998168404Spjd } 999168404Spjd } 1000168404Spjd if (start != 0) { 1001168404Spjd start = 0; 1002168404Spjd goto again; 1003168404Spjd } 1004168404Spjd ASSERT(!"out of entries!"); 1005168404Spjd} 1006168404Spjd 1007168404Spjdint 1008219089Spjdzap_add(objset_t *os, uint64_t zapobj, const char *key, 1009168404Spjd int integer_size, uint64_t num_integers, 1010168404Spjd const void *val, dmu_tx_t *tx) 1011168404Spjd{ 1012168404Spjd zap_t *zap; 1013168404Spjd int err; 1014168404Spjd mzap_ent_t *mze; 1015168404Spjd const uint64_t *intval = val; 1016185029Spjd zap_name_t *zn; 1017168404Spjd 1018185029Spjd err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, &zap); 1019168404Spjd if (err) 1020168404Spjd return (err); 1021219089Spjd zn = zap_name_alloc(zap, key, MT_EXACT); 1022185029Spjd if (zn == NULL) { 1023185029Spjd zap_unlockdir(zap); 1024249195Smm return (SET_ERROR(ENOTSUP)); 1025185029Spjd } 1026168404Spjd if (!zap->zap_ismicro) { 1027185029Spjd err = fzap_add(zn, integer_size, num_integers, val, tx); 1028185029Spjd zap = zn->zn_zap; /* fzap_add() may change zap */ 1029168404Spjd } else if (integer_size != 8 || num_integers != 1 || 1030219089Spjd strlen(key) >= MZAP_NAME_LEN) { 1031219089Spjd err = mzap_upgrade(&zn->zn_zap, tx, 0); 1032185029Spjd if (err == 0) 1033185029Spjd err = fzap_add(zn, integer_size, num_integers, val, tx); 1034185029Spjd zap = zn->zn_zap; /* fzap_add() may change zap */ 1035168404Spjd } else { 1036185029Spjd mze = mze_find(zn); 1037168404Spjd if (mze != NULL) { 1038249195Smm err = SET_ERROR(EEXIST); 1039168404Spjd } else { 1040185029Spjd mzap_addent(zn, *intval); 1041168404Spjd } 1042168404Spjd } 1043185029Spjd ASSERT(zap == zn->zn_zap); 1044185029Spjd zap_name_free(zn); 1045185029Spjd if (zap != NULL) /* may be NULL if fzap_add() failed */ 1046185029Spjd zap_unlockdir(zap); 1047168404Spjd return (err); 1048168404Spjd} 1049168404Spjd 1050168404Spjdint 1051219089Spjdzap_add_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, 1052219089Spjd int key_numints, int integer_size, uint64_t num_integers, 1053219089Spjd const void *val, dmu_tx_t *tx) 1054219089Spjd{ 1055219089Spjd zap_t *zap; 1056219089Spjd int err; 1057219089Spjd zap_name_t *zn; 1058219089Spjd 1059219089Spjd err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, &zap); 1060219089Spjd if (err) 1061219089Spjd return (err); 1062219089Spjd zn = zap_name_alloc_uint64(zap, key, key_numints); 1063219089Spjd if (zn == NULL) { 1064219089Spjd zap_unlockdir(zap); 1065249195Smm return (SET_ERROR(ENOTSUP)); 1066219089Spjd } 1067219089Spjd err = fzap_add(zn, integer_size, num_integers, val, tx); 1068219089Spjd zap = zn->zn_zap; /* fzap_add() may change zap */ 1069219089Spjd zap_name_free(zn); 1070219089Spjd if (zap != NULL) /* may be NULL if fzap_add() failed */ 1071219089Spjd zap_unlockdir(zap); 1072219089Spjd return (err); 1073219089Spjd} 1074219089Spjd 1075219089Spjdint 1076168404Spjdzap_update(objset_t *os, uint64_t zapobj, const char *name, 1077168404Spjd int integer_size, uint64_t num_integers, const void *val, dmu_tx_t *tx) 1078168404Spjd{ 1079168404Spjd zap_t *zap; 1080168404Spjd mzap_ent_t *mze; 1081219089Spjd uint64_t oldval; 1082168404Spjd const uint64_t *intval = val; 1083185029Spjd zap_name_t *zn; 1084168404Spjd int err; 1085168404Spjd 1086219089Spjd#ifdef ZFS_DEBUG 1087219089Spjd /* 1088219089Spjd * If there is an old value, it shouldn't change across the 1089219089Spjd * lockdir (eg, due to bprewrite's xlation). 1090219089Spjd */ 1091219089Spjd if (integer_size == 8 && num_integers == 1) 1092219089Spjd (void) zap_lookup(os, zapobj, name, 8, 1, &oldval); 1093219089Spjd#endif 1094219089Spjd 1095185029Spjd err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, &zap); 1096168404Spjd if (err) 1097168404Spjd return (err); 1098185029Spjd zn = zap_name_alloc(zap, name, MT_EXACT); 1099185029Spjd if (zn == NULL) { 1100185029Spjd zap_unlockdir(zap); 1101249195Smm return (SET_ERROR(ENOTSUP)); 1102185029Spjd } 1103168404Spjd if (!zap->zap_ismicro) { 1104185029Spjd err = fzap_update(zn, integer_size, num_integers, val, tx); 1105185029Spjd zap = zn->zn_zap; /* fzap_update() may change zap */ 1106168404Spjd } else if (integer_size != 8 || num_integers != 1 || 1107168404Spjd strlen(name) >= MZAP_NAME_LEN) { 1108168404Spjd dprintf("upgrading obj %llu: intsz=%u numint=%llu name=%s\n", 1109168404Spjd zapobj, integer_size, num_integers, name); 1110219089Spjd err = mzap_upgrade(&zn->zn_zap, tx, 0); 1111185029Spjd if (err == 0) 1112185029Spjd err = fzap_update(zn, integer_size, num_integers, 1113185029Spjd val, tx); 1114185029Spjd zap = zn->zn_zap; /* fzap_update() may change zap */ 1115168404Spjd } else { 1116185029Spjd mze = mze_find(zn); 1117168404Spjd if (mze != NULL) { 1118219089Spjd ASSERT3U(MZE_PHYS(zap, mze)->mze_value, ==, oldval); 1119219089Spjd MZE_PHYS(zap, mze)->mze_value = *intval; 1120168404Spjd } else { 1121185029Spjd mzap_addent(zn, *intval); 1122168404Spjd } 1123168404Spjd } 1124185029Spjd ASSERT(zap == zn->zn_zap); 1125185029Spjd zap_name_free(zn); 1126185029Spjd if (zap != NULL) /* may be NULL if fzap_upgrade() failed */ 1127185029Spjd zap_unlockdir(zap); 1128168404Spjd return (err); 1129168404Spjd} 1130168404Spjd 1131168404Spjdint 1132219089Spjdzap_update_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, 1133219089Spjd int key_numints, 1134219089Spjd int integer_size, uint64_t num_integers, const void *val, dmu_tx_t *tx) 1135219089Spjd{ 1136219089Spjd zap_t *zap; 1137219089Spjd zap_name_t *zn; 1138219089Spjd int err; 1139219089Spjd 1140219089Spjd err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, &zap); 1141219089Spjd if (err) 1142219089Spjd return (err); 1143219089Spjd zn = zap_name_alloc_uint64(zap, key, key_numints); 1144219089Spjd if (zn == NULL) { 1145219089Spjd zap_unlockdir(zap); 1146249195Smm return (SET_ERROR(ENOTSUP)); 1147219089Spjd } 1148219089Spjd err = fzap_update(zn, integer_size, num_integers, val, tx); 1149219089Spjd zap = zn->zn_zap; /* fzap_update() may change zap */ 1150219089Spjd zap_name_free(zn); 1151219089Spjd if (zap != NULL) /* may be NULL if fzap_upgrade() failed */ 1152219089Spjd zap_unlockdir(zap); 1153219089Spjd return (err); 1154219089Spjd} 1155219089Spjd 1156219089Spjdint 1157168404Spjdzap_remove(objset_t *os, uint64_t zapobj, const char *name, dmu_tx_t *tx) 1158168404Spjd{ 1159185029Spjd return (zap_remove_norm(os, zapobj, name, MT_EXACT, tx)); 1160185029Spjd} 1161185029Spjd 1162185029Spjdint 1163185029Spjdzap_remove_norm(objset_t *os, uint64_t zapobj, const char *name, 1164185029Spjd matchtype_t mt, dmu_tx_t *tx) 1165185029Spjd{ 1166168404Spjd zap_t *zap; 1167168404Spjd int err; 1168168404Spjd mzap_ent_t *mze; 1169185029Spjd zap_name_t *zn; 1170168404Spjd 1171185029Spjd err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, FALSE, &zap); 1172168404Spjd if (err) 1173168404Spjd return (err); 1174185029Spjd zn = zap_name_alloc(zap, name, mt); 1175185029Spjd if (zn == NULL) { 1176185029Spjd zap_unlockdir(zap); 1177249195Smm return (SET_ERROR(ENOTSUP)); 1178185029Spjd } 1179168404Spjd if (!zap->zap_ismicro) { 1180185029Spjd err = fzap_remove(zn, tx); 1181168404Spjd } else { 1182185029Spjd mze = mze_find(zn); 1183168404Spjd if (mze == NULL) { 1184249195Smm err = SET_ERROR(ENOENT); 1185168404Spjd } else { 1186168404Spjd zap->zap_m.zap_num_entries--; 1187275782Sdelphij bzero(&zap_m_phys(zap)->mz_chunk[mze->mze_chunkid], 1188168404Spjd sizeof (mzap_ent_phys_t)); 1189168404Spjd mze_remove(zap, mze); 1190168404Spjd } 1191168404Spjd } 1192185029Spjd zap_name_free(zn); 1193168404Spjd zap_unlockdir(zap); 1194168404Spjd return (err); 1195168404Spjd} 1196168404Spjd 1197219089Spjdint 1198219089Spjdzap_remove_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, 1199219089Spjd int key_numints, dmu_tx_t *tx) 1200219089Spjd{ 1201219089Spjd zap_t *zap; 1202219089Spjd int err; 1203219089Spjd zap_name_t *zn; 1204219089Spjd 1205219089Spjd err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, FALSE, &zap); 1206219089Spjd if (err) 1207219089Spjd return (err); 1208219089Spjd zn = zap_name_alloc_uint64(zap, key, key_numints); 1209219089Spjd if (zn == NULL) { 1210219089Spjd zap_unlockdir(zap); 1211249195Smm return (SET_ERROR(ENOTSUP)); 1212219089Spjd } 1213219089Spjd err = fzap_remove(zn, tx); 1214219089Spjd zap_name_free(zn); 1215219089Spjd zap_unlockdir(zap); 1216219089Spjd return (err); 1217219089Spjd} 1218219089Spjd 1219168404Spjd/* 1220168404Spjd * Routines for iterating over the attributes. 1221168404Spjd */ 1222168404Spjd 1223168404Spjdvoid 1224168404Spjdzap_cursor_init_serialized(zap_cursor_t *zc, objset_t *os, uint64_t zapobj, 1225168404Spjd uint64_t serialized) 1226168404Spjd{ 1227168404Spjd zc->zc_objset = os; 1228168404Spjd zc->zc_zap = NULL; 1229168404Spjd zc->zc_leaf = NULL; 1230168404Spjd zc->zc_zapobj = zapobj; 1231219089Spjd zc->zc_serialized = serialized; 1232219089Spjd zc->zc_hash = 0; 1233219089Spjd zc->zc_cd = 0; 1234168404Spjd} 1235168404Spjd 1236168404Spjdvoid 1237168404Spjdzap_cursor_init(zap_cursor_t *zc, objset_t *os, uint64_t zapobj) 1238168404Spjd{ 1239168404Spjd zap_cursor_init_serialized(zc, os, zapobj, 0); 1240168404Spjd} 1241168404Spjd 1242168404Spjdvoid 1243168404Spjdzap_cursor_fini(zap_cursor_t *zc) 1244168404Spjd{ 1245168404Spjd if (zc->zc_zap) { 1246168404Spjd rw_enter(&zc->zc_zap->zap_rwlock, RW_READER); 1247168404Spjd zap_unlockdir(zc->zc_zap); 1248168404Spjd zc->zc_zap = NULL; 1249168404Spjd } 1250168404Spjd if (zc->zc_leaf) { 1251168404Spjd rw_enter(&zc->zc_leaf->l_rwlock, RW_READER); 1252168404Spjd zap_put_leaf(zc->zc_leaf); 1253168404Spjd zc->zc_leaf = NULL; 1254168404Spjd } 1255168404Spjd zc->zc_objset = NULL; 1256168404Spjd} 1257168404Spjd 1258168404Spjduint64_t 1259168404Spjdzap_cursor_serialize(zap_cursor_t *zc) 1260168404Spjd{ 1261168404Spjd if (zc->zc_hash == -1ULL) 1262168404Spjd return (-1ULL); 1263219089Spjd if (zc->zc_zap == NULL) 1264219089Spjd return (zc->zc_serialized); 1265219089Spjd ASSERT((zc->zc_hash & zap_maxcd(zc->zc_zap)) == 0); 1266219089Spjd ASSERT(zc->zc_cd < zap_maxcd(zc->zc_zap)); 1267219089Spjd 1268219089Spjd /* 1269219089Spjd * We want to keep the high 32 bits of the cursor zero if we can, so 1270219089Spjd * that 32-bit programs can access this. So usually use a small 1271219089Spjd * (28-bit) hash value so we can fit 4 bits of cd into the low 32-bits 1272219089Spjd * of the cursor. 1273219089Spjd * 1274219089Spjd * [ collision differentiator | zap_hashbits()-bit hash value ] 1275219089Spjd */ 1276219089Spjd return ((zc->zc_hash >> (64 - zap_hashbits(zc->zc_zap))) | 1277219089Spjd ((uint64_t)zc->zc_cd << zap_hashbits(zc->zc_zap))); 1278168404Spjd} 1279168404Spjd 1280168404Spjdint 1281168404Spjdzap_cursor_retrieve(zap_cursor_t *zc, zap_attribute_t *za) 1282168404Spjd{ 1283168404Spjd int err; 1284168404Spjd avl_index_t idx; 1285168404Spjd mzap_ent_t mze_tofind; 1286168404Spjd mzap_ent_t *mze; 1287168404Spjd 1288168404Spjd if (zc->zc_hash == -1ULL) 1289249195Smm return (SET_ERROR(ENOENT)); 1290168404Spjd 1291168404Spjd if (zc->zc_zap == NULL) { 1292219089Spjd int hb; 1293168404Spjd err = zap_lockdir(zc->zc_objset, zc->zc_zapobj, NULL, 1294185029Spjd RW_READER, TRUE, FALSE, &zc->zc_zap); 1295168404Spjd if (err) 1296168404Spjd return (err); 1297219089Spjd 1298219089Spjd /* 1299219089Spjd * To support zap_cursor_init_serialized, advance, retrieve, 1300219089Spjd * we must add to the existing zc_cd, which may already 1301219089Spjd * be 1 due to the zap_cursor_advance. 1302219089Spjd */ 1303219089Spjd ASSERT(zc->zc_hash == 0); 1304219089Spjd hb = zap_hashbits(zc->zc_zap); 1305219089Spjd zc->zc_hash = zc->zc_serialized << (64 - hb); 1306219089Spjd zc->zc_cd += zc->zc_serialized >> hb; 1307219089Spjd if (zc->zc_cd >= zap_maxcd(zc->zc_zap)) /* corrupt serialized */ 1308219089Spjd zc->zc_cd = 0; 1309168404Spjd } else { 1310168404Spjd rw_enter(&zc->zc_zap->zap_rwlock, RW_READER); 1311168404Spjd } 1312168404Spjd if (!zc->zc_zap->zap_ismicro) { 1313168404Spjd err = fzap_cursor_retrieve(zc->zc_zap, zc, za); 1314168404Spjd } else { 1315168404Spjd mze_tofind.mze_hash = zc->zc_hash; 1316219089Spjd mze_tofind.mze_cd = zc->zc_cd; 1317168404Spjd 1318168404Spjd mze = avl_find(&zc->zc_zap->zap_m.zap_avl, &mze_tofind, &idx); 1319168404Spjd if (mze == NULL) { 1320168404Spjd mze = avl_nearest(&zc->zc_zap->zap_m.zap_avl, 1321168404Spjd idx, AVL_AFTER); 1322168404Spjd } 1323168404Spjd if (mze) { 1324219089Spjd mzap_ent_phys_t *mzep = MZE_PHYS(zc->zc_zap, mze); 1325219089Spjd ASSERT3U(mze->mze_cd, ==, mzep->mze_cd); 1326185029Spjd za->za_normalization_conflict = 1327185029Spjd mzap_normalization_conflict(zc->zc_zap, NULL, mze); 1328168404Spjd za->za_integer_length = 8; 1329168404Spjd za->za_num_integers = 1; 1330219089Spjd za->za_first_integer = mzep->mze_value; 1331219089Spjd (void) strcpy(za->za_name, mzep->mze_name); 1332168404Spjd zc->zc_hash = mze->mze_hash; 1333219089Spjd zc->zc_cd = mze->mze_cd; 1334168404Spjd err = 0; 1335168404Spjd } else { 1336168404Spjd zc->zc_hash = -1ULL; 1337249195Smm err = SET_ERROR(ENOENT); 1338168404Spjd } 1339168404Spjd } 1340168404Spjd rw_exit(&zc->zc_zap->zap_rwlock); 1341168404Spjd return (err); 1342168404Spjd} 1343168404Spjd 1344168404Spjdvoid 1345168404Spjdzap_cursor_advance(zap_cursor_t *zc) 1346168404Spjd{ 1347168404Spjd if (zc->zc_hash == -1ULL) 1348168404Spjd return; 1349168404Spjd zc->zc_cd++; 1350219089Spjd} 1351219089Spjd 1352219089Spjdint 1353219089Spjdzap_cursor_move_to_key(zap_cursor_t *zc, const char *name, matchtype_t mt) 1354219089Spjd{ 1355219089Spjd int err = 0; 1356219089Spjd mzap_ent_t *mze; 1357219089Spjd zap_name_t *zn; 1358219089Spjd 1359219089Spjd if (zc->zc_zap == NULL) { 1360219089Spjd err = zap_lockdir(zc->zc_objset, zc->zc_zapobj, NULL, 1361219089Spjd RW_READER, TRUE, FALSE, &zc->zc_zap); 1362219089Spjd if (err) 1363219089Spjd return (err); 1364219089Spjd } else { 1365219089Spjd rw_enter(&zc->zc_zap->zap_rwlock, RW_READER); 1366168404Spjd } 1367219089Spjd 1368219089Spjd zn = zap_name_alloc(zc->zc_zap, name, mt); 1369219089Spjd if (zn == NULL) { 1370219089Spjd rw_exit(&zc->zc_zap->zap_rwlock); 1371249195Smm return (SET_ERROR(ENOTSUP)); 1372219089Spjd } 1373219089Spjd 1374219089Spjd if (!zc->zc_zap->zap_ismicro) { 1375219089Spjd err = fzap_cursor_move_to_key(zc, zn); 1376219089Spjd } else { 1377219089Spjd mze = mze_find(zn); 1378219089Spjd if (mze == NULL) { 1379249195Smm err = SET_ERROR(ENOENT); 1380219089Spjd goto out; 1381219089Spjd } 1382219089Spjd zc->zc_hash = mze->mze_hash; 1383219089Spjd zc->zc_cd = mze->mze_cd; 1384219089Spjd } 1385219089Spjd 1386219089Spjdout: 1387219089Spjd zap_name_free(zn); 1388219089Spjd rw_exit(&zc->zc_zap->zap_rwlock); 1389219089Spjd return (err); 1390168404Spjd} 1391168404Spjd 1392168404Spjdint 1393168404Spjdzap_get_stats(objset_t *os, uint64_t zapobj, zap_stats_t *zs) 1394168404Spjd{ 1395168404Spjd int err; 1396168404Spjd zap_t *zap; 1397168404Spjd 1398185029Spjd err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); 1399168404Spjd if (err) 1400168404Spjd return (err); 1401168404Spjd 1402168404Spjd bzero(zs, sizeof (zap_stats_t)); 1403168404Spjd 1404168404Spjd if (zap->zap_ismicro) { 1405168404Spjd zs->zs_blocksize = zap->zap_dbuf->db_size; 1406168404Spjd zs->zs_num_entries = zap->zap_m.zap_num_entries; 1407168404Spjd zs->zs_num_blocks = 1; 1408168404Spjd } else { 1409168404Spjd fzap_get_stats(zap, zs); 1410168404Spjd } 1411168404Spjd zap_unlockdir(zap); 1412168404Spjd return (0); 1413168404Spjd} 1414209962Smm 1415209962Smmint 1416209962Smmzap_count_write(objset_t *os, uint64_t zapobj, const char *name, int add, 1417209962Smm uint64_t *towrite, uint64_t *tooverwrite) 1418209962Smm{ 1419209962Smm zap_t *zap; 1420209962Smm int err = 0; 1421209962Smm 1422209962Smm /* 1423209962Smm * Since, we don't have a name, we cannot figure out which blocks will 1424209962Smm * be affected in this operation. So, account for the worst case : 1425209962Smm * - 3 blocks overwritten: target leaf, ptrtbl block, header block 1426209962Smm * - 4 new blocks written if adding: 1427209962Smm * - 2 blocks for possibly split leaves, 1428209962Smm * - 2 grown ptrtbl blocks 1429209962Smm * 1430209962Smm * This also accomodates the case where an add operation to a fairly 1431209962Smm * large microzap results in a promotion to fatzap. 1432209962Smm */ 1433209962Smm if (name == NULL) { 1434274337Sdelphij *towrite += (3 + (add ? 4 : 0)) * SPA_OLD_MAXBLOCKSIZE; 1435209962Smm return (err); 1436209962Smm } 1437209962Smm 1438209962Smm /* 1439228103Smm * We lock the zap with adding == FALSE. Because, if we pass 1440209962Smm * the actual value of add, it could trigger a mzap_upgrade(). 1441209962Smm * At present we are just evaluating the possibility of this operation 1442209962Smm * and hence we donot want to trigger an upgrade. 1443209962Smm */ 1444209962Smm err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); 1445209962Smm if (err) 1446209962Smm return (err); 1447209962Smm 1448209962Smm if (!zap->zap_ismicro) { 1449209962Smm zap_name_t *zn = zap_name_alloc(zap, name, MT_EXACT); 1450209962Smm if (zn) { 1451209962Smm err = fzap_count_write(zn, add, towrite, 1452209962Smm tooverwrite); 1453209962Smm zap_name_free(zn); 1454209962Smm } else { 1455209962Smm /* 1456209962Smm * We treat this case as similar to (name == NULL) 1457209962Smm */ 1458274337Sdelphij *towrite += (3 + (add ? 4 : 0)) * SPA_OLD_MAXBLOCKSIZE; 1459209962Smm } 1460209962Smm } else { 1461209962Smm /* 1462209962Smm * We are here if (name != NULL) and this is a micro-zap. 1463209962Smm * We account for the header block depending on whether it 1464209962Smm * is freeable. 1465209962Smm * 1466209962Smm * Incase of an add-operation it is hard to find out 1467209962Smm * if this add will promote this microzap to fatzap. 1468209962Smm * Hence, we consider the worst case and account for the 1469209962Smm * blocks assuming this microzap would be promoted to a 1470209962Smm * fatzap. 1471209962Smm * 1472209962Smm * 1 block overwritten : header block 1473209962Smm * 4 new blocks written : 2 new split leaf, 2 grown 1474209962Smm * ptrtbl blocks 1475209962Smm */ 1476209962Smm if (dmu_buf_freeable(zap->zap_dbuf)) 1477274337Sdelphij *tooverwrite += MZAP_MAX_BLKSZ; 1478209962Smm else 1479274337Sdelphij *towrite += MZAP_MAX_BLKSZ; 1480209962Smm 1481209962Smm if (add) { 1482274337Sdelphij *towrite += 4 * MZAP_MAX_BLKSZ; 1483209962Smm } 1484209962Smm } 1485209962Smm 1486209962Smm zap_unlockdir(zap); 1487209962Smm return (err); 1488209962Smm} 1489