1fa9e4066Sahrens /* 2fa9e4066Sahrens * CDDL HEADER START 3fa9e4066Sahrens * 4fa9e4066Sahrens * The contents of this file are subject to the terms of the 5f65e61c0Sahrens * Common Development and Distribution License (the "License"). 6f65e61c0Sahrens * You may not use this file except in compliance with the License. 7fa9e4066Sahrens * 8fa9e4066Sahrens * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9fa9e4066Sahrens * or http://www.opensolaris.org/os/licensing. 10fa9e4066Sahrens * See the License for the specific language governing permissions 11fa9e4066Sahrens * and limitations under the License. 12fa9e4066Sahrens * 13fa9e4066Sahrens * When distributing Covered Code, include this CDDL HEADER in each 14fa9e4066Sahrens * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15fa9e4066Sahrens * If applicable, add the following below this CDDL HEADER, with the 16fa9e4066Sahrens * fields enclosed by brackets "[]" replaced with your own identifying 17fa9e4066Sahrens * information: Portions Copyright [yyyy] [name of copyright owner] 18fa9e4066Sahrens * 19fa9e4066Sahrens * CDDL HEADER END 20fa9e4066Sahrens */ 21fa9e4066Sahrens /* 2247cb52daSJeff Bonwick * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 23bf16b11eSMatthew Ahrens * Copyright (c) 2012, 2014 by Delphix. All rights reserved. 24fa9e4066Sahrens */ 25fa9e4066Sahrens 26fa9e4066Sahrens /* 27fa9e4066Sahrens * This file contains the top half of the zfs directory structure 28fa9e4066Sahrens * implementation. The bottom half is in zap_leaf.c. 29fa9e4066Sahrens * 30fa9e4066Sahrens * The zdir is an extendable hash data structure. There is a table of 31fa9e4066Sahrens * pointers to buckets (zap_t->zd_data->zd_leafs). The buckets are 32fa9e4066Sahrens * each a constant size and hold a variable number of directory entries. 33fa9e4066Sahrens * The buckets (aka "leaf nodes") are implemented in zap_leaf.c. 34fa9e4066Sahrens * 35fa9e4066Sahrens * The pointer table holds a power of 2 number of pointers. 36fa9e4066Sahrens * (1<<zap_t->zd_data->zd_phys->zd_prefix_len). The bucket pointed to 37fa9e4066Sahrens * by the pointer at index i in the table holds entries whose hash value 38fa9e4066Sahrens * has a zd_prefix_len - bit prefix 39fa9e4066Sahrens */ 40fa9e4066Sahrens 41fa9e4066Sahrens #include <sys/spa.h> 42fa9e4066Sahrens #include <sys/dmu.h> 43fa9e4066Sahrens #include <sys/zfs_context.h> 44de8267e0Stimh #include <sys/zfs_znode.h> 45478ed9adSEric Taylor #include <sys/fs/zfs.h> 46fa9e4066Sahrens #include <sys/zap.h> 47ea8dc4b6Seschrock #include <sys/refcount.h> 48fa9e4066Sahrens #include <sys/zap_impl.h> 49fa9e4066Sahrens #include <sys/zap_leaf.h> 50fa9e4066Sahrens 51f65e61c0Sahrens int fzap_default_block_shift = 14; /* 16k blocksize */ 52fa9e4066Sahrens 53*c1379625SJustin T. Gibbs extern inline zap_phys_t *zap_f_phys(zap_t *zap); 54*c1379625SJustin T. Gibbs 55fa9e4066Sahrens static void zap_leaf_pageout(dmu_buf_t *db, void *vl); 5666328dd3Sahrens static uint64_t zap_allocate_blocks(zap_t *zap, int nblocks); 57fa9e4066Sahrens 58fa9e4066Sahrens void 59fa9e4066Sahrens fzap_byteswap(void *vbuf, size_t size) 60fa9e4066Sahrens { 61fa9e4066Sahrens uint64_t block_type; 62fa9e4066Sahrens 63fa9e4066Sahrens block_type = *(uint64_t *)vbuf; 64fa9e4066Sahrens 655ad82045Snd if (block_type == ZBT_LEAF || block_type == BSWAP_64(ZBT_LEAF)) 66f65e61c0Sahrens zap_leaf_byteswap(vbuf, size); 675ad82045Snd else { 68fa9e4066Sahrens /* it's a ptrtbl block */ 69f65e61c0Sahrens byteswap_uint64_array(vbuf, size); 70fa9e4066Sahrens } 71fa9e4066Sahrens } 72fa9e4066Sahrens 73fa9e4066Sahrens void 74b24ab676SJeff Bonwick fzap_upgrade(zap_t *zap, dmu_tx_t *tx, zap_flags_t flags) 75fa9e4066Sahrens { 76fa9e4066Sahrens dmu_buf_t *db; 77fa9e4066Sahrens zap_leaf_t *l; 78fa9e4066Sahrens int i; 79fa9e4066Sahrens zap_phys_t *zp; 80fa9e4066Sahrens 81fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 82fa9e4066Sahrens zap->zap_ismicro = FALSE; 83fa9e4066Sahrens 84*c1379625SJustin T. Gibbs (void) dmu_buf_update_user(zap->zap_dbuf, zap, zap, zap_evict); 85fa9e4066Sahrens 86fa9e4066Sahrens mutex_init(&zap->zap_f.zap_num_entries_mtx, 0, 0, 0); 87bf16b11eSMatthew Ahrens zap->zap_f.zap_block_shift = highbit64(zap->zap_dbuf->db_size) - 1; 88fa9e4066Sahrens 89*c1379625SJustin T. Gibbs zp = zap_f_phys(zap); 90fa9e4066Sahrens /* 91fa9e4066Sahrens * explicitly zero it since it might be coming from an 92fa9e4066Sahrens * initialized microzap 93fa9e4066Sahrens */ 94f65e61c0Sahrens bzero(zap->zap_dbuf->db_data, zap->zap_dbuf->db_size); 95fa9e4066Sahrens zp->zap_block_type = ZBT_HEADER; 96fa9e4066Sahrens zp->zap_magic = ZAP_MAGIC; 97fa9e4066Sahrens 98f65e61c0Sahrens zp->zap_ptrtbl.zt_shift = ZAP_EMBEDDED_PTRTBL_SHIFT(zap); 99fa9e4066Sahrens 100fa9e4066Sahrens zp->zap_freeblk = 2; /* block 1 will be the first leaf */ 101fa9e4066Sahrens zp->zap_num_leafs = 1; 102fa9e4066Sahrens zp->zap_num_entries = 0; 103fa9e4066Sahrens zp->zap_salt = zap->zap_salt; 104da6c28aaSamw zp->zap_normflags = zap->zap_normflags; 105b24ab676SJeff Bonwick zp->zap_flags = flags; 106fa9e4066Sahrens 107f65e61c0Sahrens /* block 1 will be the first leaf */ 108f65e61c0Sahrens for (i = 0; i < (1<<zp->zap_ptrtbl.zt_shift); i++) 109f65e61c0Sahrens ZAP_EMBEDDED_PTRTBL_ENT(zap, i) = 1; 110fa9e4066Sahrens 111fa9e4066Sahrens /* 112fa9e4066Sahrens * set up block 1 - the first leaf 113fa9e4066Sahrens */ 114ea8dc4b6Seschrock VERIFY(0 == dmu_buf_hold(zap->zap_objset, zap->zap_object, 11547cb52daSJeff Bonwick 1<<FZAP_BLOCK_SHIFT(zap), FTAG, &db, DMU_READ_NO_PREFETCH)); 116fa9e4066Sahrens dmu_buf_will_dirty(db, tx); 117fa9e4066Sahrens 118fa9e4066Sahrens l = kmem_zalloc(sizeof (zap_leaf_t), KM_SLEEP); 119fa9e4066Sahrens l->l_dbuf = db; 120fa9e4066Sahrens 121de8267e0Stimh zap_leaf_init(l, zp->zap_normflags != 0); 122fa9e4066Sahrens 123fa9e4066Sahrens kmem_free(l, sizeof (zap_leaf_t)); 124ea8dc4b6Seschrock dmu_buf_rele(db, FTAG); 125fa9e4066Sahrens } 126fa9e4066Sahrens 127fa9e4066Sahrens static int 128fa9e4066Sahrens zap_tryupgradedir(zap_t *zap, dmu_tx_t *tx) 129fa9e4066Sahrens { 130fa9e4066Sahrens if (RW_WRITE_HELD(&zap->zap_rwlock)) 131fa9e4066Sahrens return (1); 132fa9e4066Sahrens if (rw_tryupgrade(&zap->zap_rwlock)) { 133fa9e4066Sahrens dmu_buf_will_dirty(zap->zap_dbuf, tx); 134fa9e4066Sahrens return (1); 135fa9e4066Sahrens } 136fa9e4066Sahrens return (0); 137fa9e4066Sahrens } 138fa9e4066Sahrens 139fa9e4066Sahrens /* 140fa9e4066Sahrens * Generic routines for dealing with the pointer & cookie tables. 141fa9e4066Sahrens */ 142fa9e4066Sahrens 14366328dd3Sahrens static int 144fa9e4066Sahrens zap_table_grow(zap_t *zap, zap_table_phys_t *tbl, 145fa9e4066Sahrens void (*transfer_func)(const uint64_t *src, uint64_t *dst, int n), 146fa9e4066Sahrens dmu_tx_t *tx) 147fa9e4066Sahrens { 148fa9e4066Sahrens uint64_t b, newblk; 149fa9e4066Sahrens dmu_buf_t *db_old, *db_new; 150ea8dc4b6Seschrock int err; 151f65e61c0Sahrens int bs = FZAP_BLOCK_SHIFT(zap); 152f65e61c0Sahrens int hepb = 1<<(bs-4); 153fa9e4066Sahrens /* hepb = half the number of entries in a block */ 154fa9e4066Sahrens 155fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 156fa9e4066Sahrens ASSERT(tbl->zt_blk != 0); 157fa9e4066Sahrens ASSERT(tbl->zt_numblks > 0); 158fa9e4066Sahrens 159fa9e4066Sahrens if (tbl->zt_nextblk != 0) { 160fa9e4066Sahrens newblk = tbl->zt_nextblk; 161fa9e4066Sahrens } else { 16266328dd3Sahrens newblk = zap_allocate_blocks(zap, tbl->zt_numblks * 2); 163fa9e4066Sahrens tbl->zt_nextblk = newblk; 164fb09f5aaSMadhav Suresh ASSERT0(tbl->zt_blks_copied); 165fa9e4066Sahrens dmu_prefetch(zap->zap_objset, zap->zap_object, 166f65e61c0Sahrens tbl->zt_blk << bs, tbl->zt_numblks << bs); 167fa9e4066Sahrens } 168fa9e4066Sahrens 169fa9e4066Sahrens /* 17066328dd3Sahrens * Copy the ptrtbl from the old to new location. 171fa9e4066Sahrens */ 172fa9e4066Sahrens 173fa9e4066Sahrens b = tbl->zt_blks_copied; 174ea8dc4b6Seschrock err = dmu_buf_hold(zap->zap_objset, zap->zap_object, 17547cb52daSJeff Bonwick (tbl->zt_blk + b) << bs, FTAG, &db_old, DMU_READ_NO_PREFETCH); 176ea8dc4b6Seschrock if (err) 17766328dd3Sahrens return (err); 178fa9e4066Sahrens 179fa9e4066Sahrens /* first half of entries in old[b] go to new[2*b+0] */ 180ea8dc4b6Seschrock VERIFY(0 == dmu_buf_hold(zap->zap_objset, zap->zap_object, 18147cb52daSJeff Bonwick (newblk + 2*b+0) << bs, FTAG, &db_new, DMU_READ_NO_PREFETCH)); 182fa9e4066Sahrens dmu_buf_will_dirty(db_new, tx); 183fa9e4066Sahrens transfer_func(db_old->db_data, db_new->db_data, hepb); 184ea8dc4b6Seschrock dmu_buf_rele(db_new, FTAG); 185fa9e4066Sahrens 186fa9e4066Sahrens /* second half of entries in old[b] go to new[2*b+1] */ 187ea8dc4b6Seschrock VERIFY(0 == dmu_buf_hold(zap->zap_objset, zap->zap_object, 18847cb52daSJeff Bonwick (newblk + 2*b+1) << bs, FTAG, &db_new, DMU_READ_NO_PREFETCH)); 189fa9e4066Sahrens dmu_buf_will_dirty(db_new, tx); 190fa9e4066Sahrens transfer_func((uint64_t *)db_old->db_data + hepb, 191fa9e4066Sahrens db_new->db_data, hepb); 192ea8dc4b6Seschrock dmu_buf_rele(db_new, FTAG); 193fa9e4066Sahrens 194ea8dc4b6Seschrock dmu_buf_rele(db_old, FTAG); 195fa9e4066Sahrens 196fa9e4066Sahrens tbl->zt_blks_copied++; 197fa9e4066Sahrens 198fa9e4066Sahrens dprintf("copied block %llu of %llu\n", 199fa9e4066Sahrens tbl->zt_blks_copied, tbl->zt_numblks); 200fa9e4066Sahrens 201fa9e4066Sahrens if (tbl->zt_blks_copied == tbl->zt_numblks) { 202ea8dc4b6Seschrock (void) dmu_free_range(zap->zap_objset, zap->zap_object, 203f65e61c0Sahrens tbl->zt_blk << bs, tbl->zt_numblks << bs, tx); 204fa9e4066Sahrens 205fa9e4066Sahrens tbl->zt_blk = newblk; 206fa9e4066Sahrens tbl->zt_numblks *= 2; 207fa9e4066Sahrens tbl->zt_shift++; 208fa9e4066Sahrens tbl->zt_nextblk = 0; 209fa9e4066Sahrens tbl->zt_blks_copied = 0; 210fa9e4066Sahrens 211fa9e4066Sahrens dprintf("finished; numblocks now %llu (%lluk entries)\n", 212fa9e4066Sahrens tbl->zt_numblks, 1<<(tbl->zt_shift-10)); 213fa9e4066Sahrens } 21466328dd3Sahrens 21566328dd3Sahrens return (0); 216fa9e4066Sahrens } 217fa9e4066Sahrens 218ea8dc4b6Seschrock static int 219fa9e4066Sahrens zap_table_store(zap_t *zap, zap_table_phys_t *tbl, uint64_t idx, uint64_t val, 220fa9e4066Sahrens dmu_tx_t *tx) 221fa9e4066Sahrens { 222ea8dc4b6Seschrock int err; 223ea8dc4b6Seschrock uint64_t blk, off; 224f65e61c0Sahrens int bs = FZAP_BLOCK_SHIFT(zap); 225ea8dc4b6Seschrock dmu_buf_t *db; 226fa9e4066Sahrens 227fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 228fa9e4066Sahrens ASSERT(tbl->zt_blk != 0); 229fa9e4066Sahrens 230fa9e4066Sahrens dprintf("storing %llx at index %llx\n", val, idx); 231fa9e4066Sahrens 232f65e61c0Sahrens blk = idx >> (bs-3); 233f65e61c0Sahrens off = idx & ((1<<(bs-3))-1); 234fa9e4066Sahrens 235ea8dc4b6Seschrock err = dmu_buf_hold(zap->zap_objset, zap->zap_object, 23647cb52daSJeff Bonwick (tbl->zt_blk + blk) << bs, FTAG, &db, DMU_READ_NO_PREFETCH); 237ea8dc4b6Seschrock if (err) 238ea8dc4b6Seschrock return (err); 239fa9e4066Sahrens dmu_buf_will_dirty(db, tx); 240fa9e4066Sahrens 241fa9e4066Sahrens if (tbl->zt_nextblk != 0) { 242ea8dc4b6Seschrock uint64_t idx2 = idx * 2; 243ea8dc4b6Seschrock uint64_t blk2 = idx2 >> (bs-3); 244ea8dc4b6Seschrock uint64_t off2 = idx2 & ((1<<(bs-3))-1); 245ea8dc4b6Seschrock dmu_buf_t *db2; 246ea8dc4b6Seschrock 247ea8dc4b6Seschrock err = dmu_buf_hold(zap->zap_objset, zap->zap_object, 24847cb52daSJeff Bonwick (tbl->zt_nextblk + blk2) << bs, FTAG, &db2, 24947cb52daSJeff Bonwick DMU_READ_NO_PREFETCH); 250ea8dc4b6Seschrock if (err) { 251ea8dc4b6Seschrock dmu_buf_rele(db, FTAG); 252ea8dc4b6Seschrock return (err); 253ea8dc4b6Seschrock } 254ea8dc4b6Seschrock dmu_buf_will_dirty(db2, tx); 255ea8dc4b6Seschrock ((uint64_t *)db2->db_data)[off2] = val; 256ea8dc4b6Seschrock ((uint64_t *)db2->db_data)[off2+1] = val; 257ea8dc4b6Seschrock dmu_buf_rele(db2, FTAG); 258fa9e4066Sahrens } 259fa9e4066Sahrens 260ea8dc4b6Seschrock ((uint64_t *)db->db_data)[off] = val; 261ea8dc4b6Seschrock dmu_buf_rele(db, FTAG); 262ea8dc4b6Seschrock 263ea8dc4b6Seschrock return (0); 264fa9e4066Sahrens } 265fa9e4066Sahrens 266ea8dc4b6Seschrock static int 267ea8dc4b6Seschrock zap_table_load(zap_t *zap, zap_table_phys_t *tbl, uint64_t idx, uint64_t *valp) 268fa9e4066Sahrens { 269ea8dc4b6Seschrock uint64_t blk, off; 270ea8dc4b6Seschrock int err; 271fa9e4066Sahrens dmu_buf_t *db; 272f65e61c0Sahrens int bs = FZAP_BLOCK_SHIFT(zap); 273fa9e4066Sahrens 274fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 275fa9e4066Sahrens 276f65e61c0Sahrens blk = idx >> (bs-3); 277f65e61c0Sahrens off = idx & ((1<<(bs-3))-1); 278fa9e4066Sahrens 279ea8dc4b6Seschrock err = dmu_buf_hold(zap->zap_objset, zap->zap_object, 28047cb52daSJeff Bonwick (tbl->zt_blk + blk) << bs, FTAG, &db, DMU_READ_NO_PREFETCH); 281ea8dc4b6Seschrock if (err) 282ea8dc4b6Seschrock return (err); 283ea8dc4b6Seschrock *valp = ((uint64_t *)db->db_data)[off]; 284ea8dc4b6Seschrock dmu_buf_rele(db, FTAG); 285ea8dc4b6Seschrock 286ea8dc4b6Seschrock if (tbl->zt_nextblk != 0) { 287ea8dc4b6Seschrock /* 288ea8dc4b6Seschrock * read the nextblk for the sake of i/o error checking, 289ea8dc4b6Seschrock * so that zap_table_load() will catch errors for 290ea8dc4b6Seschrock * zap_table_store. 291ea8dc4b6Seschrock */ 292ea8dc4b6Seschrock blk = (idx*2) >> (bs-3); 293ea8dc4b6Seschrock 294ea8dc4b6Seschrock err = dmu_buf_hold(zap->zap_objset, zap->zap_object, 29547cb52daSJeff Bonwick (tbl->zt_nextblk + blk) << bs, FTAG, &db, 29647cb52daSJeff Bonwick DMU_READ_NO_PREFETCH); 297b287be1bSWill Andrews if (err == 0) 298b287be1bSWill Andrews dmu_buf_rele(db, FTAG); 299ea8dc4b6Seschrock } 300ea8dc4b6Seschrock return (err); 301fa9e4066Sahrens } 302fa9e4066Sahrens 303fa9e4066Sahrens /* 304fa9e4066Sahrens * Routines for growing the ptrtbl. 305fa9e4066Sahrens */ 306fa9e4066Sahrens 307fa9e4066Sahrens static void 308fa9e4066Sahrens zap_ptrtbl_transfer(const uint64_t *src, uint64_t *dst, int n) 309fa9e4066Sahrens { 310fa9e4066Sahrens int i; 311fa9e4066Sahrens for (i = 0; i < n; i++) { 312fa9e4066Sahrens uint64_t lb = src[i]; 313fa9e4066Sahrens dst[2*i+0] = lb; 314fa9e4066Sahrens dst[2*i+1] = lb; 315fa9e4066Sahrens } 316fa9e4066Sahrens } 317fa9e4066Sahrens 31866328dd3Sahrens static int 319fa9e4066Sahrens zap_grow_ptrtbl(zap_t *zap, dmu_tx_t *tx) 320fa9e4066Sahrens { 321b24ab676SJeff Bonwick /* 322b24ab676SJeff Bonwick * The pointer table should never use more hash bits than we 323b24ab676SJeff Bonwick * have (otherwise we'd be using useless zero bits to index it). 324b24ab676SJeff Bonwick * If we are within 2 bits of running out, stop growing, since 325b24ab676SJeff Bonwick * this is already an aberrant condition. 326b24ab676SJeff Bonwick */ 327*c1379625SJustin T. Gibbs if (zap_f_phys(zap)->zap_ptrtbl.zt_shift >= zap_hashbits(zap) - 2) 328be6fd75aSMatthew Ahrens return (SET_ERROR(ENOSPC)); 329fa9e4066Sahrens 330*c1379625SJustin T. Gibbs if (zap_f_phys(zap)->zap_ptrtbl.zt_numblks == 0) { 331fa9e4066Sahrens /* 332f65e61c0Sahrens * We are outgrowing the "embedded" ptrtbl (the one 333f65e61c0Sahrens * stored in the header block). Give it its own entire 334f65e61c0Sahrens * block, which will double the size of the ptrtbl. 335fa9e4066Sahrens */ 336fa9e4066Sahrens uint64_t newblk; 337fa9e4066Sahrens dmu_buf_t *db_new; 338ea8dc4b6Seschrock int err; 339fa9e4066Sahrens 340*c1379625SJustin T. Gibbs ASSERT3U(zap_f_phys(zap)->zap_ptrtbl.zt_shift, ==, 341f65e61c0Sahrens ZAP_EMBEDDED_PTRTBL_SHIFT(zap)); 342*c1379625SJustin T. Gibbs ASSERT0(zap_f_phys(zap)->zap_ptrtbl.zt_blk); 343fa9e4066Sahrens 34466328dd3Sahrens newblk = zap_allocate_blocks(zap, 1); 345ea8dc4b6Seschrock err = dmu_buf_hold(zap->zap_objset, zap->zap_object, 34647cb52daSJeff Bonwick newblk << FZAP_BLOCK_SHIFT(zap), FTAG, &db_new, 34747cb52daSJeff Bonwick DMU_READ_NO_PREFETCH); 348ea8dc4b6Seschrock if (err) 34966328dd3Sahrens return (err); 350fa9e4066Sahrens dmu_buf_will_dirty(db_new, tx); 351f65e61c0Sahrens zap_ptrtbl_transfer(&ZAP_EMBEDDED_PTRTBL_ENT(zap, 0), 352f65e61c0Sahrens db_new->db_data, 1 << ZAP_EMBEDDED_PTRTBL_SHIFT(zap)); 353ea8dc4b6Seschrock dmu_buf_rele(db_new, FTAG); 354fa9e4066Sahrens 355*c1379625SJustin T. Gibbs zap_f_phys(zap)->zap_ptrtbl.zt_blk = newblk; 356*c1379625SJustin T. Gibbs zap_f_phys(zap)->zap_ptrtbl.zt_numblks = 1; 357*c1379625SJustin T. Gibbs zap_f_phys(zap)->zap_ptrtbl.zt_shift++; 358fa9e4066Sahrens 359*c1379625SJustin T. Gibbs ASSERT3U(1ULL << zap_f_phys(zap)->zap_ptrtbl.zt_shift, ==, 360*c1379625SJustin T. Gibbs zap_f_phys(zap)->zap_ptrtbl.zt_numblks << 361f65e61c0Sahrens (FZAP_BLOCK_SHIFT(zap)-3)); 36266328dd3Sahrens 36366328dd3Sahrens return (0); 364fa9e4066Sahrens } else { 365*c1379625SJustin T. Gibbs return (zap_table_grow(zap, &zap_f_phys(zap)->zap_ptrtbl, 36666328dd3Sahrens zap_ptrtbl_transfer, tx)); 367fa9e4066Sahrens } 368fa9e4066Sahrens } 369fa9e4066Sahrens 370fa9e4066Sahrens static void 371fa9e4066Sahrens zap_increment_num_entries(zap_t *zap, int delta, dmu_tx_t *tx) 372fa9e4066Sahrens { 373fa9e4066Sahrens dmu_buf_will_dirty(zap->zap_dbuf, tx); 374fa9e4066Sahrens mutex_enter(&zap->zap_f.zap_num_entries_mtx); 375*c1379625SJustin T. Gibbs ASSERT(delta > 0 || zap_f_phys(zap)->zap_num_entries >= -delta); 376*c1379625SJustin T. Gibbs zap_f_phys(zap)->zap_num_entries += delta; 377fa9e4066Sahrens mutex_exit(&zap->zap_f.zap_num_entries_mtx); 378fa9e4066Sahrens } 379fa9e4066Sahrens 38066328dd3Sahrens static uint64_t 38166328dd3Sahrens zap_allocate_blocks(zap_t *zap, int nblocks) 382fa9e4066Sahrens { 383fa9e4066Sahrens uint64_t newblk; 38466328dd3Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 385*c1379625SJustin T. Gibbs newblk = zap_f_phys(zap)->zap_freeblk; 386*c1379625SJustin T. Gibbs zap_f_phys(zap)->zap_freeblk += nblocks; 387fa9e4066Sahrens return (newblk); 388fa9e4066Sahrens } 389fa9e4066Sahrens 39066328dd3Sahrens static zap_leaf_t * 391fa9e4066Sahrens zap_create_leaf(zap_t *zap, dmu_tx_t *tx) 392fa9e4066Sahrens { 393fa9e4066Sahrens void *winner; 394fa9e4066Sahrens zap_leaf_t *l = kmem_alloc(sizeof (zap_leaf_t), KM_SLEEP); 395fa9e4066Sahrens 396fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 397fa9e4066Sahrens 398fa9e4066Sahrens rw_init(&l->l_rwlock, 0, 0, 0); 399fa9e4066Sahrens rw_enter(&l->l_rwlock, RW_WRITER); 40066328dd3Sahrens l->l_blkid = zap_allocate_blocks(zap, 1); 401fa9e4066Sahrens l->l_dbuf = NULL; 402fa9e4066Sahrens 403ea8dc4b6Seschrock VERIFY(0 == dmu_buf_hold(zap->zap_objset, zap->zap_object, 40447cb52daSJeff Bonwick l->l_blkid << FZAP_BLOCK_SHIFT(zap), NULL, &l->l_dbuf, 40547cb52daSJeff Bonwick DMU_READ_NO_PREFETCH)); 406*c1379625SJustin T. Gibbs winner = dmu_buf_set_user(l->l_dbuf, l, zap_leaf_pageout); 407fa9e4066Sahrens ASSERT(winner == NULL); 408fa9e4066Sahrens dmu_buf_will_dirty(l->l_dbuf, tx); 409fa9e4066Sahrens 410de8267e0Stimh zap_leaf_init(l, zap->zap_normflags != 0); 411fa9e4066Sahrens 412*c1379625SJustin T. Gibbs zap_f_phys(zap)->zap_num_leafs++; 413fa9e4066Sahrens 41466328dd3Sahrens return (l); 415fa9e4066Sahrens } 416fa9e4066Sahrens 417fa9e4066Sahrens int 418fa9e4066Sahrens fzap_count(zap_t *zap, uint64_t *count) 419fa9e4066Sahrens { 420fa9e4066Sahrens ASSERT(!zap->zap_ismicro); 421fa9e4066Sahrens mutex_enter(&zap->zap_f.zap_num_entries_mtx); /* unnecessary */ 422*c1379625SJustin T. Gibbs *count = zap_f_phys(zap)->zap_num_entries; 423fa9e4066Sahrens mutex_exit(&zap->zap_f.zap_num_entries_mtx); 424fa9e4066Sahrens return (0); 425fa9e4066Sahrens } 426fa9e4066Sahrens 427fa9e4066Sahrens /* 428fa9e4066Sahrens * Routines for obtaining zap_leaf_t's 429fa9e4066Sahrens */ 430fa9e4066Sahrens 43187e5029aSahrens void 432fa9e4066Sahrens zap_put_leaf(zap_leaf_t *l) 433fa9e4066Sahrens { 434fa9e4066Sahrens rw_exit(&l->l_rwlock); 435ea8dc4b6Seschrock dmu_buf_rele(l->l_dbuf, NULL); 436fa9e4066Sahrens } 437fa9e4066Sahrens 438fa9e4066Sahrens _NOTE(ARGSUSED(0)) 439fa9e4066Sahrens static void 440fa9e4066Sahrens zap_leaf_pageout(dmu_buf_t *db, void *vl) 441fa9e4066Sahrens { 442fa9e4066Sahrens zap_leaf_t *l = vl; 443fa9e4066Sahrens 444fa9e4066Sahrens rw_destroy(&l->l_rwlock); 445fa9e4066Sahrens kmem_free(l, sizeof (zap_leaf_t)); 446fa9e4066Sahrens } 447fa9e4066Sahrens 448fa9e4066Sahrens static zap_leaf_t * 449fa9e4066Sahrens zap_open_leaf(uint64_t blkid, dmu_buf_t *db) 450fa9e4066Sahrens { 451fa9e4066Sahrens zap_leaf_t *l, *winner; 452fa9e4066Sahrens 453fa9e4066Sahrens ASSERT(blkid != 0); 454fa9e4066Sahrens 455fa9e4066Sahrens l = kmem_alloc(sizeof (zap_leaf_t), KM_SLEEP); 456fa9e4066Sahrens rw_init(&l->l_rwlock, 0, 0, 0); 457fa9e4066Sahrens rw_enter(&l->l_rwlock, RW_WRITER); 458fa9e4066Sahrens l->l_blkid = blkid; 459bf16b11eSMatthew Ahrens l->l_bs = highbit64(db->db_size) - 1; 460fa9e4066Sahrens l->l_dbuf = db; 461fa9e4066Sahrens 462*c1379625SJustin T. Gibbs winner = dmu_buf_set_user(db, l, zap_leaf_pageout); 463fa9e4066Sahrens 464fa9e4066Sahrens rw_exit(&l->l_rwlock); 465fa9e4066Sahrens if (winner != NULL) { 466fa9e4066Sahrens /* someone else set it first */ 467fa9e4066Sahrens zap_leaf_pageout(NULL, l); 468fa9e4066Sahrens l = winner; 469fa9e4066Sahrens } 470fa9e4066Sahrens 47166328dd3Sahrens /* 47266328dd3Sahrens * lhr_pad was previously used for the next leaf in the leaf 47366328dd3Sahrens * chain. There should be no chained leafs (as we have removed 47466328dd3Sahrens * support for them). 47566328dd3Sahrens */ 476*c1379625SJustin T. Gibbs ASSERT0(zap_leaf_phys(l)->l_hdr.lh_pad1); 47766328dd3Sahrens 478f65e61c0Sahrens /* 479f65e61c0Sahrens * There should be more hash entries than there can be 480f65e61c0Sahrens * chunks to put in the hash table 481f65e61c0Sahrens */ 482f65e61c0Sahrens ASSERT3U(ZAP_LEAF_HASH_NUMENTRIES(l), >, ZAP_LEAF_NUMCHUNKS(l) / 3); 483f65e61c0Sahrens 484f65e61c0Sahrens /* The chunks should begin at the end of the hash table */ 485f65e61c0Sahrens ASSERT3P(&ZAP_LEAF_CHUNK(l, 0), ==, 486*c1379625SJustin T. Gibbs &zap_leaf_phys(l)->l_hash[ZAP_LEAF_HASH_NUMENTRIES(l)]); 487f65e61c0Sahrens 488f65e61c0Sahrens /* The chunks should end at the end of the block */ 489f65e61c0Sahrens ASSERT3U((uintptr_t)&ZAP_LEAF_CHUNK(l, ZAP_LEAF_NUMCHUNKS(l)) - 490*c1379625SJustin T. Gibbs (uintptr_t)zap_leaf_phys(l), ==, l->l_dbuf->db_size); 491f65e61c0Sahrens 492fa9e4066Sahrens return (l); 493fa9e4066Sahrens } 494fa9e4066Sahrens 495ea8dc4b6Seschrock static int 49666328dd3Sahrens zap_get_leaf_byblk(zap_t *zap, uint64_t blkid, dmu_tx_t *tx, krw_t lt, 497ea8dc4b6Seschrock zap_leaf_t **lp) 498fa9e4066Sahrens { 499fa9e4066Sahrens dmu_buf_t *db; 500fa9e4066Sahrens zap_leaf_t *l; 501f65e61c0Sahrens int bs = FZAP_BLOCK_SHIFT(zap); 502ea8dc4b6Seschrock int err; 503fa9e4066Sahrens 504fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 505fa9e4066Sahrens 506ea8dc4b6Seschrock err = dmu_buf_hold(zap->zap_objset, zap->zap_object, 50747cb52daSJeff Bonwick blkid << bs, NULL, &db, DMU_READ_NO_PREFETCH); 508ea8dc4b6Seschrock if (err) 509ea8dc4b6Seschrock return (err); 510fa9e4066Sahrens 511fa9e4066Sahrens ASSERT3U(db->db_object, ==, zap->zap_object); 512f65e61c0Sahrens ASSERT3U(db->db_offset, ==, blkid << bs); 513f65e61c0Sahrens ASSERT3U(db->db_size, ==, 1 << bs); 514fa9e4066Sahrens ASSERT(blkid != 0); 515fa9e4066Sahrens 516fa9e4066Sahrens l = dmu_buf_get_user(db); 517fa9e4066Sahrens 518fa9e4066Sahrens if (l == NULL) 519fa9e4066Sahrens l = zap_open_leaf(blkid, db); 520fa9e4066Sahrens 521fa9e4066Sahrens rw_enter(&l->l_rwlock, lt); 522fa9e4066Sahrens /* 523*c1379625SJustin T. Gibbs * Must lock before dirtying, otherwise zap_leaf_phys(l) could change, 524fa9e4066Sahrens * causing ASSERT below to fail. 525fa9e4066Sahrens */ 526fa9e4066Sahrens if (lt == RW_WRITER) 527fa9e4066Sahrens dmu_buf_will_dirty(db, tx); 528fa9e4066Sahrens ASSERT3U(l->l_blkid, ==, blkid); 529fa9e4066Sahrens ASSERT3P(l->l_dbuf, ==, db); 530*c1379625SJustin T. Gibbs ASSERT3U(zap_leaf_phys(l)->l_hdr.lh_block_type, ==, ZBT_LEAF); 531*c1379625SJustin T. Gibbs ASSERT3U(zap_leaf_phys(l)->l_hdr.lh_magic, ==, ZAP_LEAF_MAGIC); 532fa9e4066Sahrens 533ea8dc4b6Seschrock *lp = l; 534ea8dc4b6Seschrock return (0); 535fa9e4066Sahrens } 536fa9e4066Sahrens 537ea8dc4b6Seschrock static int 538ea8dc4b6Seschrock zap_idx_to_blk(zap_t *zap, uint64_t idx, uint64_t *valp) 539fa9e4066Sahrens { 540fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 541fa9e4066Sahrens 542*c1379625SJustin T. Gibbs if (zap_f_phys(zap)->zap_ptrtbl.zt_numblks == 0) { 543fa9e4066Sahrens ASSERT3U(idx, <, 544*c1379625SJustin T. Gibbs (1ULL << zap_f_phys(zap)->zap_ptrtbl.zt_shift)); 545ea8dc4b6Seschrock *valp = ZAP_EMBEDDED_PTRTBL_ENT(zap, idx); 546ea8dc4b6Seschrock return (0); 547fa9e4066Sahrens } else { 548*c1379625SJustin T. Gibbs return (zap_table_load(zap, &zap_f_phys(zap)->zap_ptrtbl, 549ea8dc4b6Seschrock idx, valp)); 550fa9e4066Sahrens } 551fa9e4066Sahrens } 552fa9e4066Sahrens 553ea8dc4b6Seschrock static int 554fa9e4066Sahrens zap_set_idx_to_blk(zap_t *zap, uint64_t idx, uint64_t blk, dmu_tx_t *tx) 555fa9e4066Sahrens { 556fa9e4066Sahrens ASSERT(tx != NULL); 557fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 558fa9e4066Sahrens 559*c1379625SJustin T. Gibbs if (zap_f_phys(zap)->zap_ptrtbl.zt_blk == 0) { 560f65e61c0Sahrens ZAP_EMBEDDED_PTRTBL_ENT(zap, idx) = blk; 561ea8dc4b6Seschrock return (0); 562fa9e4066Sahrens } else { 563*c1379625SJustin T. Gibbs return (zap_table_store(zap, &zap_f_phys(zap)->zap_ptrtbl, 564ea8dc4b6Seschrock idx, blk, tx)); 565fa9e4066Sahrens } 566fa9e4066Sahrens } 567fa9e4066Sahrens 568ea8dc4b6Seschrock static int 569ea8dc4b6Seschrock zap_deref_leaf(zap_t *zap, uint64_t h, dmu_tx_t *tx, krw_t lt, zap_leaf_t **lp) 570fa9e4066Sahrens { 571ea8dc4b6Seschrock uint64_t idx, blk; 572ea8dc4b6Seschrock int err; 573fa9e4066Sahrens 574fa9e4066Sahrens ASSERT(zap->zap_dbuf == NULL || 575*c1379625SJustin T. Gibbs zap_f_phys(zap) == zap->zap_dbuf->db_data); 576*c1379625SJustin T. Gibbs ASSERT3U(zap_f_phys(zap)->zap_magic, ==, ZAP_MAGIC); 577*c1379625SJustin T. Gibbs idx = ZAP_HASH_IDX(h, zap_f_phys(zap)->zap_ptrtbl.zt_shift); 578ea8dc4b6Seschrock err = zap_idx_to_blk(zap, idx, &blk); 579ea8dc4b6Seschrock if (err != 0) 580ea8dc4b6Seschrock return (err); 581ea8dc4b6Seschrock err = zap_get_leaf_byblk(zap, blk, tx, lt, lp); 582fa9e4066Sahrens 583*c1379625SJustin T. Gibbs ASSERT(err || 584*c1379625SJustin T. Gibbs ZAP_HASH_IDX(h, zap_leaf_phys(*lp)->l_hdr.lh_prefix_len) == 585*c1379625SJustin T. Gibbs zap_leaf_phys(*lp)->l_hdr.lh_prefix); 586ea8dc4b6Seschrock return (err); 587fa9e4066Sahrens } 588fa9e4066Sahrens 589ea8dc4b6Seschrock static int 590ad860c82Sbonwick zap_expand_leaf(zap_name_t *zn, zap_leaf_t *l, dmu_tx_t *tx, zap_leaf_t **lp) 591fa9e4066Sahrens { 592ad860c82Sbonwick zap_t *zap = zn->zn_zap; 593ad860c82Sbonwick uint64_t hash = zn->zn_hash; 594fa9e4066Sahrens zap_leaf_t *nl; 595fa9e4066Sahrens int prefix_diff, i, err; 596fa9e4066Sahrens uint64_t sibling; 597*c1379625SJustin T. Gibbs int old_prefix_len = zap_leaf_phys(l)->l_hdr.lh_prefix_len; 598fa9e4066Sahrens 599*c1379625SJustin T. Gibbs ASSERT3U(old_prefix_len, <=, zap_f_phys(zap)->zap_ptrtbl.zt_shift); 600fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 601fa9e4066Sahrens 60266328dd3Sahrens ASSERT3U(ZAP_HASH_IDX(hash, old_prefix_len), ==, 603*c1379625SJustin T. Gibbs zap_leaf_phys(l)->l_hdr.lh_prefix); 604fa9e4066Sahrens 60566328dd3Sahrens if (zap_tryupgradedir(zap, tx) == 0 || 606*c1379625SJustin T. Gibbs old_prefix_len == zap_f_phys(zap)->zap_ptrtbl.zt_shift) { 60766328dd3Sahrens /* We failed to upgrade, or need to grow the pointer table */ 608fa9e4066Sahrens objset_t *os = zap->zap_objset; 609fa9e4066Sahrens uint64_t object = zap->zap_object; 610fa9e4066Sahrens 611fa9e4066Sahrens zap_put_leaf(l); 612fa9e4066Sahrens zap_unlockdir(zap); 613c5f9e431Sahrens err = zap_lockdir(os, object, tx, RW_WRITER, 614ad860c82Sbonwick FALSE, FALSE, &zn->zn_zap); 615ad860c82Sbonwick zap = zn->zn_zap; 61666328dd3Sahrens if (err) 61766328dd3Sahrens return (err); 618fa9e4066Sahrens ASSERT(!zap->zap_ismicro); 619fa9e4066Sahrens 62066328dd3Sahrens while (old_prefix_len == 621*c1379625SJustin T. Gibbs zap_f_phys(zap)->zap_ptrtbl.zt_shift) { 62266328dd3Sahrens err = zap_grow_ptrtbl(zap, tx); 62366328dd3Sahrens if (err) 62466328dd3Sahrens return (err); 62566328dd3Sahrens } 62666328dd3Sahrens 62766328dd3Sahrens err = zap_deref_leaf(zap, hash, tx, RW_WRITER, &l); 62866328dd3Sahrens if (err) 62966328dd3Sahrens return (err); 63066328dd3Sahrens 631*c1379625SJustin T. Gibbs if (zap_leaf_phys(l)->l_hdr.lh_prefix_len != old_prefix_len) { 632fa9e4066Sahrens /* it split while our locks were down */ 633ea8dc4b6Seschrock *lp = l; 634ea8dc4b6Seschrock return (0); 635ea8dc4b6Seschrock } 636fa9e4066Sahrens } 637fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 638*c1379625SJustin T. Gibbs ASSERT3U(old_prefix_len, <, zap_f_phys(zap)->zap_ptrtbl.zt_shift); 63966328dd3Sahrens ASSERT3U(ZAP_HASH_IDX(hash, old_prefix_len), ==, 640*c1379625SJustin T. Gibbs zap_leaf_phys(l)->l_hdr.lh_prefix); 641fa9e4066Sahrens 642*c1379625SJustin T. Gibbs prefix_diff = zap_f_phys(zap)->zap_ptrtbl.zt_shift - 64366328dd3Sahrens (old_prefix_len + 1); 64466328dd3Sahrens sibling = (ZAP_HASH_IDX(hash, old_prefix_len + 1) | 1) << prefix_diff; 645ea8dc4b6Seschrock 646ea8dc4b6Seschrock /* check for i/o errors before doing zap_leaf_split */ 647fa9e4066Sahrens for (i = 0; i < (1ULL<<prefix_diff); i++) { 648ea8dc4b6Seschrock uint64_t blk; 649ea8dc4b6Seschrock err = zap_idx_to_blk(zap, sibling+i, &blk); 650ea8dc4b6Seschrock if (err) 651ea8dc4b6Seschrock return (err); 652ea8dc4b6Seschrock ASSERT3U(blk, ==, l->l_blkid); 653ea8dc4b6Seschrock } 654ea8dc4b6Seschrock 65566328dd3Sahrens nl = zap_create_leaf(zap, tx); 656de8267e0Stimh zap_leaf_split(l, nl, zap->zap_normflags != 0); 657ea8dc4b6Seschrock 65866328dd3Sahrens /* set sibling pointers */ 659fb09f5aaSMadhav Suresh for (i = 0; i < (1ULL << prefix_diff); i++) { 660ea8dc4b6Seschrock err = zap_set_idx_to_blk(zap, sibling+i, nl->l_blkid, tx); 661fb09f5aaSMadhav Suresh ASSERT0(err); /* we checked for i/o errors above */ 662fa9e4066Sahrens } 663fa9e4066Sahrens 664*c1379625SJustin T. Gibbs if (hash & (1ULL << (64 - zap_leaf_phys(l)->l_hdr.lh_prefix_len))) { 665fa9e4066Sahrens /* we want the sibling */ 666fa9e4066Sahrens zap_put_leaf(l); 66766328dd3Sahrens *lp = nl; 668fa9e4066Sahrens } else { 669fa9e4066Sahrens zap_put_leaf(nl); 67066328dd3Sahrens *lp = l; 671fa9e4066Sahrens } 672fa9e4066Sahrens 673ea8dc4b6Seschrock return (0); 674fa9e4066Sahrens } 675fa9e4066Sahrens 676fa9e4066Sahrens static void 677ad860c82Sbonwick zap_put_leaf_maybe_grow_ptrtbl(zap_name_t *zn, zap_leaf_t *l, dmu_tx_t *tx) 678fa9e4066Sahrens { 679ad860c82Sbonwick zap_t *zap = zn->zn_zap; 680*c1379625SJustin T. Gibbs int shift = zap_f_phys(zap)->zap_ptrtbl.zt_shift; 681*c1379625SJustin T. Gibbs int leaffull = (zap_leaf_phys(l)->l_hdr.lh_prefix_len == shift && 682*c1379625SJustin T. Gibbs zap_leaf_phys(l)->l_hdr.lh_nfree < ZAP_LEAF_LOW_WATER); 683fa9e4066Sahrens 68466328dd3Sahrens zap_put_leaf(l); 685fa9e4066Sahrens 686*c1379625SJustin T. Gibbs if (leaffull || zap_f_phys(zap)->zap_ptrtbl.zt_nextblk) { 68766328dd3Sahrens int err; 688fa9e4066Sahrens 68966328dd3Sahrens /* 69066328dd3Sahrens * We are in the middle of growing the pointer table, or 69166328dd3Sahrens * this leaf will soon make us grow it. 69266328dd3Sahrens */ 693fa9e4066Sahrens if (zap_tryupgradedir(zap, tx) == 0) { 694fa9e4066Sahrens objset_t *os = zap->zap_objset; 695fa9e4066Sahrens uint64_t zapobj = zap->zap_object; 696fa9e4066Sahrens 697fa9e4066Sahrens zap_unlockdir(zap); 698fa9e4066Sahrens err = zap_lockdir(os, zapobj, tx, 699ad860c82Sbonwick RW_WRITER, FALSE, FALSE, &zn->zn_zap); 700ad860c82Sbonwick zap = zn->zn_zap; 70166328dd3Sahrens if (err) 70266328dd3Sahrens return; 703fa9e4066Sahrens } 704fa9e4066Sahrens 70566328dd3Sahrens /* could have finished growing while our locks were down */ 706*c1379625SJustin T. Gibbs if (zap_f_phys(zap)->zap_ptrtbl.zt_shift == shift) 70766328dd3Sahrens (void) zap_grow_ptrtbl(zap, tx); 708fa9e4066Sahrens } 709fa9e4066Sahrens } 710fa9e4066Sahrens 711fa9e4066Sahrens static int 71292241e0bSTom Erickson fzap_checkname(zap_name_t *zn) 713fa9e4066Sahrens { 714486ae710SMatthew Ahrens if (zn->zn_key_orig_numints * zn->zn_key_intlen > ZAP_MAXNAMELEN) 715be6fd75aSMatthew Ahrens return (SET_ERROR(ENAMETOOLONG)); 71692241e0bSTom Erickson return (0); 71792241e0bSTom Erickson } 71866328dd3Sahrens 71992241e0bSTom Erickson static int 72092241e0bSTom Erickson fzap_checksize(uint64_t integer_size, uint64_t num_integers) 72192241e0bSTom Erickson { 722fa9e4066Sahrens /* Only integer sizes supported by C */ 723fa9e4066Sahrens switch (integer_size) { 724fa9e4066Sahrens case 1: 725fa9e4066Sahrens case 2: 726fa9e4066Sahrens case 4: 727fa9e4066Sahrens case 8: 728fa9e4066Sahrens break; 729fa9e4066Sahrens default: 730be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL)); 731fa9e4066Sahrens } 732fa9e4066Sahrens 73366328dd3Sahrens if (integer_size * num_integers > ZAP_MAXVALUELEN) 73466328dd3Sahrens return (E2BIG); 735fa9e4066Sahrens 736fa9e4066Sahrens return (0); 737fa9e4066Sahrens } 738fa9e4066Sahrens 73992241e0bSTom Erickson static int 74092241e0bSTom Erickson fzap_check(zap_name_t *zn, uint64_t integer_size, uint64_t num_integers) 74192241e0bSTom Erickson { 74292241e0bSTom Erickson int err; 74392241e0bSTom Erickson 74492241e0bSTom Erickson if ((err = fzap_checkname(zn)) != 0) 74592241e0bSTom Erickson return (err); 74692241e0bSTom Erickson return (fzap_checksize(integer_size, num_integers)); 74792241e0bSTom Erickson } 74892241e0bSTom Erickson 749fa9e4066Sahrens /* 750da6c28aaSamw * Routines for manipulating attributes. 751fa9e4066Sahrens */ 752fa9e4066Sahrens int 753da6c28aaSamw fzap_lookup(zap_name_t *zn, 754da6c28aaSamw uint64_t integer_size, uint64_t num_integers, void *buf, 755da6c28aaSamw char *realname, int rn_len, boolean_t *ncp) 756fa9e4066Sahrens { 757fa9e4066Sahrens zap_leaf_t *l; 758fa9e4066Sahrens int err; 759fa9e4066Sahrens zap_entry_handle_t zeh; 760fa9e4066Sahrens 76192241e0bSTom Erickson if ((err = fzap_checkname(zn)) != 0) 762fa9e4066Sahrens return (err); 763fa9e4066Sahrens 764da6c28aaSamw err = zap_deref_leaf(zn->zn_zap, zn->zn_hash, NULL, RW_READER, &l); 765ea8dc4b6Seschrock if (err != 0) 766ea8dc4b6Seschrock return (err); 767da6c28aaSamw err = zap_leaf_lookup(l, zn, &zeh); 768da6c28aaSamw if (err == 0) { 76992241e0bSTom Erickson if ((err = fzap_checksize(integer_size, num_integers)) != 0) { 77092241e0bSTom Erickson zap_put_leaf(l); 77192241e0bSTom Erickson return (err); 77292241e0bSTom Erickson } 77392241e0bSTom Erickson 77466328dd3Sahrens err = zap_entry_read(&zeh, integer_size, num_integers, buf); 775b24ab676SJeff Bonwick (void) zap_entry_read_name(zn->zn_zap, &zeh, rn_len, realname); 776da6c28aaSamw if (ncp) { 777da6c28aaSamw *ncp = zap_entry_normalization_conflict(&zeh, 778da6c28aaSamw zn, NULL, zn->zn_zap); 779da6c28aaSamw } 780da6c28aaSamw } 78166328dd3Sahrens 782fa9e4066Sahrens zap_put_leaf(l); 783fa9e4066Sahrens return (err); 784fa9e4066Sahrens } 785fa9e4066Sahrens 786fa9e4066Sahrens int 787da6c28aaSamw fzap_add_cd(zap_name_t *zn, 788fa9e4066Sahrens uint64_t integer_size, uint64_t num_integers, 789ea8dc4b6Seschrock const void *val, uint32_t cd, dmu_tx_t *tx) 790fa9e4066Sahrens { 791fa9e4066Sahrens zap_leaf_t *l; 792fa9e4066Sahrens int err; 793fa9e4066Sahrens zap_entry_handle_t zeh; 794da6c28aaSamw zap_t *zap = zn->zn_zap; 795fa9e4066Sahrens 796fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 797fa9e4066Sahrens ASSERT(!zap->zap_ismicro); 79892241e0bSTom Erickson ASSERT(fzap_check(zn, integer_size, num_integers) == 0); 799fa9e4066Sahrens 800da6c28aaSamw err = zap_deref_leaf(zap, zn->zn_hash, tx, RW_WRITER, &l); 801ea8dc4b6Seschrock if (err != 0) 802ea8dc4b6Seschrock return (err); 803fa9e4066Sahrens retry: 804da6c28aaSamw err = zap_leaf_lookup(l, zn, &zeh); 805fa9e4066Sahrens if (err == 0) { 806be6fd75aSMatthew Ahrens err = SET_ERROR(EEXIST); 807fa9e4066Sahrens goto out; 808fa9e4066Sahrens } 809ea8dc4b6Seschrock if (err != ENOENT) 810ea8dc4b6Seschrock goto out; 811fa9e4066Sahrens 812b24ab676SJeff Bonwick err = zap_entry_create(l, zn, cd, 813fa9e4066Sahrens integer_size, num_integers, val, &zeh); 814fa9e4066Sahrens 815fa9e4066Sahrens if (err == 0) { 816fa9e4066Sahrens zap_increment_num_entries(zap, 1, tx); 817fa9e4066Sahrens } else if (err == EAGAIN) { 818ad860c82Sbonwick err = zap_expand_leaf(zn, l, tx, &l); 819ad860c82Sbonwick zap = zn->zn_zap; /* zap_expand_leaf() may change zap */ 82066328dd3Sahrens if (err == 0) 82166328dd3Sahrens goto retry; 822fa9e4066Sahrens } 823fa9e4066Sahrens 824fa9e4066Sahrens out: 825ad860c82Sbonwick if (zap != NULL) 826ad860c82Sbonwick zap_put_leaf_maybe_grow_ptrtbl(zn, l, tx); 827fa9e4066Sahrens return (err); 828fa9e4066Sahrens } 829fa9e4066Sahrens 830fa9e4066Sahrens int 831da6c28aaSamw fzap_add(zap_name_t *zn, 832fa9e4066Sahrens uint64_t integer_size, uint64_t num_integers, 833fa9e4066Sahrens const void *val, dmu_tx_t *tx) 834fa9e4066Sahrens { 83592241e0bSTom Erickson int err = fzap_check(zn, integer_size, num_integers); 836fa9e4066Sahrens if (err != 0) 837fa9e4066Sahrens return (err); 838fa9e4066Sahrens 839da6c28aaSamw return (fzap_add_cd(zn, integer_size, num_integers, 840b24ab676SJeff Bonwick val, ZAP_NEED_CD, tx)); 841fa9e4066Sahrens } 842fa9e4066Sahrens 843fa9e4066Sahrens int 844da6c28aaSamw fzap_update(zap_name_t *zn, 845fa9e4066Sahrens int integer_size, uint64_t num_integers, const void *val, dmu_tx_t *tx) 846fa9e4066Sahrens { 847fa9e4066Sahrens zap_leaf_t *l; 848fa9e4066Sahrens int err, create; 849fa9e4066Sahrens zap_entry_handle_t zeh; 850da6c28aaSamw zap_t *zap = zn->zn_zap; 851fa9e4066Sahrens 852fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 85392241e0bSTom Erickson err = fzap_check(zn, integer_size, num_integers); 854fa9e4066Sahrens if (err != 0) 855fa9e4066Sahrens return (err); 856fa9e4066Sahrens 857da6c28aaSamw err = zap_deref_leaf(zap, zn->zn_hash, tx, RW_WRITER, &l); 858ea8dc4b6Seschrock if (err != 0) 859ea8dc4b6Seschrock return (err); 860fa9e4066Sahrens retry: 861da6c28aaSamw err = zap_leaf_lookup(l, zn, &zeh); 862fa9e4066Sahrens create = (err == ENOENT); 863fa9e4066Sahrens ASSERT(err == 0 || err == ENOENT); 864fa9e4066Sahrens 865fa9e4066Sahrens if (create) { 866b24ab676SJeff Bonwick err = zap_entry_create(l, zn, ZAP_NEED_CD, 867b24ab676SJeff Bonwick integer_size, num_integers, val, &zeh); 868fa9e4066Sahrens if (err == 0) 869fa9e4066Sahrens zap_increment_num_entries(zap, 1, tx); 870fa9e4066Sahrens } else { 871fa9e4066Sahrens err = zap_entry_update(&zeh, integer_size, num_integers, val); 872fa9e4066Sahrens } 873fa9e4066Sahrens 874fa9e4066Sahrens if (err == EAGAIN) { 875ad860c82Sbonwick err = zap_expand_leaf(zn, l, tx, &l); 876ad860c82Sbonwick zap = zn->zn_zap; /* zap_expand_leaf() may change zap */ 87766328dd3Sahrens if (err == 0) 87866328dd3Sahrens goto retry; 879fa9e4066Sahrens } 880fa9e4066Sahrens 881ad860c82Sbonwick if (zap != NULL) 882ad860c82Sbonwick zap_put_leaf_maybe_grow_ptrtbl(zn, l, tx); 883fa9e4066Sahrens return (err); 884fa9e4066Sahrens } 885fa9e4066Sahrens 886fa9e4066Sahrens int 887da6c28aaSamw fzap_length(zap_name_t *zn, 888fa9e4066Sahrens uint64_t *integer_size, uint64_t *num_integers) 889fa9e4066Sahrens { 890fa9e4066Sahrens zap_leaf_t *l; 891fa9e4066Sahrens int err; 892fa9e4066Sahrens zap_entry_handle_t zeh; 893fa9e4066Sahrens 894da6c28aaSamw err = zap_deref_leaf(zn->zn_zap, zn->zn_hash, NULL, RW_READER, &l); 895ea8dc4b6Seschrock if (err != 0) 896ea8dc4b6Seschrock return (err); 897da6c28aaSamw err = zap_leaf_lookup(l, zn, &zeh); 898fa9e4066Sahrens if (err != 0) 899fa9e4066Sahrens goto out; 900fa9e4066Sahrens 901fa9e4066Sahrens if (integer_size) 902fa9e4066Sahrens *integer_size = zeh.zeh_integer_size; 903fa9e4066Sahrens if (num_integers) 904fa9e4066Sahrens *num_integers = zeh.zeh_num_integers; 905fa9e4066Sahrens out: 906fa9e4066Sahrens zap_put_leaf(l); 907fa9e4066Sahrens return (err); 908fa9e4066Sahrens } 909fa9e4066Sahrens 910fa9e4066Sahrens int 911da6c28aaSamw fzap_remove(zap_name_t *zn, dmu_tx_t *tx) 912fa9e4066Sahrens { 913fa9e4066Sahrens zap_leaf_t *l; 914fa9e4066Sahrens int err; 915fa9e4066Sahrens zap_entry_handle_t zeh; 916fa9e4066Sahrens 917da6c28aaSamw err = zap_deref_leaf(zn->zn_zap, zn->zn_hash, tx, RW_WRITER, &l); 918ea8dc4b6Seschrock if (err != 0) 919ea8dc4b6Seschrock return (err); 920da6c28aaSamw err = zap_leaf_lookup(l, zn, &zeh); 921fa9e4066Sahrens if (err == 0) { 922fa9e4066Sahrens zap_entry_remove(&zeh); 923da6c28aaSamw zap_increment_num_entries(zn->zn_zap, -1, tx); 924fa9e4066Sahrens } 925fa9e4066Sahrens zap_put_leaf(l); 926fa9e4066Sahrens return (err); 927fa9e4066Sahrens } 928fa9e4066Sahrens 929c7cd2421SGeorge Wilson void 930c7cd2421SGeorge Wilson fzap_prefetch(zap_name_t *zn) 931c7cd2421SGeorge Wilson { 932c7cd2421SGeorge Wilson uint64_t idx, blk; 933c7cd2421SGeorge Wilson zap_t *zap = zn->zn_zap; 934c7cd2421SGeorge Wilson int bs; 935c7cd2421SGeorge Wilson 936c7cd2421SGeorge Wilson idx = ZAP_HASH_IDX(zn->zn_hash, 937*c1379625SJustin T. Gibbs zap_f_phys(zap)->zap_ptrtbl.zt_shift); 938c7cd2421SGeorge Wilson if (zap_idx_to_blk(zap, idx, &blk) != 0) 939c7cd2421SGeorge Wilson return; 940c7cd2421SGeorge Wilson bs = FZAP_BLOCK_SHIFT(zap); 941c7cd2421SGeorge Wilson dmu_prefetch(zap->zap_objset, zap->zap_object, blk << bs, 1 << bs); 942c7cd2421SGeorge Wilson } 943c7cd2421SGeorge Wilson 944088f3894Sahrens /* 945088f3894Sahrens * Helper functions for consumers. 946088f3894Sahrens */ 947088f3894Sahrens 948ad135b5dSChristopher Siden uint64_t 949ad135b5dSChristopher Siden zap_create_link(objset_t *os, dmu_object_type_t ot, uint64_t parent_obj, 950ad135b5dSChristopher Siden const char *name, dmu_tx_t *tx) 951ad135b5dSChristopher Siden { 952ad135b5dSChristopher Siden uint64_t new_obj; 953ad135b5dSChristopher Siden 954ad135b5dSChristopher Siden VERIFY((new_obj = zap_create(os, ot, DMU_OT_NONE, 0, tx)) > 0); 955ad135b5dSChristopher Siden VERIFY(zap_add(os, parent_obj, name, sizeof (uint64_t), 1, &new_obj, 956ad135b5dSChristopher Siden tx) == 0); 957ad135b5dSChristopher Siden 958ad135b5dSChristopher Siden return (new_obj); 959ad135b5dSChristopher Siden } 960ad135b5dSChristopher Siden 961fa9e4066Sahrens int 962e7437265Sahrens zap_value_search(objset_t *os, uint64_t zapobj, uint64_t value, uint64_t mask, 963e7437265Sahrens char *name) 964fa9e4066Sahrens { 965fa9e4066Sahrens zap_cursor_t zc; 966fa9e4066Sahrens zap_attribute_t *za; 967fa9e4066Sahrens int err; 968fa9e4066Sahrens 969e7437265Sahrens if (mask == 0) 970e7437265Sahrens mask = -1ULL; 971e7437265Sahrens 972fa9e4066Sahrens za = kmem_alloc(sizeof (zap_attribute_t), KM_SLEEP); 973fa9e4066Sahrens for (zap_cursor_init(&zc, os, zapobj); 974fa9e4066Sahrens (err = zap_cursor_retrieve(&zc, za)) == 0; 975fa9e4066Sahrens zap_cursor_advance(&zc)) { 976e7437265Sahrens if ((za->za_first_integer & mask) == (value & mask)) { 977fa9e4066Sahrens (void) strcpy(name, za->za_name); 978fa9e4066Sahrens break; 979fa9e4066Sahrens } 980fa9e4066Sahrens } 98187e5029aSahrens zap_cursor_fini(&zc); 982fa9e4066Sahrens kmem_free(za, sizeof (zap_attribute_t)); 983fa9e4066Sahrens return (err); 984fa9e4066Sahrens } 985fa9e4066Sahrens 986088f3894Sahrens int 987088f3894Sahrens zap_join(objset_t *os, uint64_t fromobj, uint64_t intoobj, dmu_tx_t *tx) 988088f3894Sahrens { 989088f3894Sahrens zap_cursor_t zc; 990088f3894Sahrens zap_attribute_t za; 991088f3894Sahrens int err; 992088f3894Sahrens 993b287be1bSWill Andrews err = 0; 994088f3894Sahrens for (zap_cursor_init(&zc, os, fromobj); 995088f3894Sahrens zap_cursor_retrieve(&zc, &za) == 0; 996088f3894Sahrens (void) zap_cursor_advance(&zc)) { 997b287be1bSWill Andrews if (za.za_integer_length != 8 || za.za_num_integers != 1) { 998b287be1bSWill Andrews err = SET_ERROR(EINVAL); 999b287be1bSWill Andrews break; 1000b287be1bSWill Andrews } 1001088f3894Sahrens err = zap_add(os, intoobj, za.za_name, 1002088f3894Sahrens 8, 1, &za.za_first_integer, tx); 1003088f3894Sahrens if (err) 1004b287be1bSWill Andrews break; 1005088f3894Sahrens } 1006088f3894Sahrens zap_cursor_fini(&zc); 1007b287be1bSWill Andrews return (err); 1008088f3894Sahrens } 1009088f3894Sahrens 10103f9d6ad7SLin Ling int 10113f9d6ad7SLin Ling zap_join_key(objset_t *os, uint64_t fromobj, uint64_t intoobj, 10123f9d6ad7SLin Ling uint64_t value, dmu_tx_t *tx) 10133f9d6ad7SLin Ling { 10143f9d6ad7SLin Ling zap_cursor_t zc; 10153f9d6ad7SLin Ling zap_attribute_t za; 10163f9d6ad7SLin Ling int err; 10173f9d6ad7SLin Ling 1018b287be1bSWill Andrews err = 0; 10193f9d6ad7SLin Ling for (zap_cursor_init(&zc, os, fromobj); 10203f9d6ad7SLin Ling zap_cursor_retrieve(&zc, &za) == 0; 10213f9d6ad7SLin Ling (void) zap_cursor_advance(&zc)) { 1022b287be1bSWill Andrews if (za.za_integer_length != 8 || za.za_num_integers != 1) { 1023b287be1bSWill Andrews err = SET_ERROR(EINVAL); 1024b287be1bSWill Andrews break; 1025b287be1bSWill Andrews } 10263f9d6ad7SLin Ling err = zap_add(os, intoobj, za.za_name, 10273f9d6ad7SLin Ling 8, 1, &value, tx); 10283f9d6ad7SLin Ling if (err) 1029b287be1bSWill Andrews break; 10303f9d6ad7SLin Ling } 10313f9d6ad7SLin Ling zap_cursor_fini(&zc); 1032b287be1bSWill Andrews return (err); 10333f9d6ad7SLin Ling } 10343f9d6ad7SLin Ling 10353f9d6ad7SLin Ling int 10363f9d6ad7SLin Ling zap_join_increment(objset_t *os, uint64_t fromobj, uint64_t intoobj, 10373f9d6ad7SLin Ling dmu_tx_t *tx) 10383f9d6ad7SLin Ling { 10393f9d6ad7SLin Ling zap_cursor_t zc; 10403f9d6ad7SLin Ling zap_attribute_t za; 10413f9d6ad7SLin Ling int err; 10423f9d6ad7SLin Ling 1043b287be1bSWill Andrews err = 0; 10443f9d6ad7SLin Ling for (zap_cursor_init(&zc, os, fromobj); 10453f9d6ad7SLin Ling zap_cursor_retrieve(&zc, &za) == 0; 10463f9d6ad7SLin Ling (void) zap_cursor_advance(&zc)) { 10473f9d6ad7SLin Ling uint64_t delta = 0; 10483f9d6ad7SLin Ling 1049b287be1bSWill Andrews if (za.za_integer_length != 8 || za.za_num_integers != 1) { 1050b287be1bSWill Andrews err = SET_ERROR(EINVAL); 1051b287be1bSWill Andrews break; 1052b287be1bSWill Andrews } 10533f9d6ad7SLin Ling 10543f9d6ad7SLin Ling err = zap_lookup(os, intoobj, za.za_name, 8, 1, &delta); 10553f9d6ad7SLin Ling if (err != 0 && err != ENOENT) 1056b287be1bSWill Andrews break; 10573f9d6ad7SLin Ling delta += za.za_first_integer; 10583f9d6ad7SLin Ling err = zap_update(os, intoobj, za.za_name, 8, 1, &delta, tx); 10593f9d6ad7SLin Ling if (err) 1060b287be1bSWill Andrews break; 10613f9d6ad7SLin Ling } 10623f9d6ad7SLin Ling zap_cursor_fini(&zc); 1063b287be1bSWill Andrews return (err); 10643f9d6ad7SLin Ling } 10653f9d6ad7SLin Ling 1066088f3894Sahrens int 1067088f3894Sahrens zap_add_int(objset_t *os, uint64_t obj, uint64_t value, dmu_tx_t *tx) 1068088f3894Sahrens { 1069088f3894Sahrens char name[20]; 1070088f3894Sahrens 1071088f3894Sahrens (void) snprintf(name, sizeof (name), "%llx", (longlong_t)value); 1072088f3894Sahrens return (zap_add(os, obj, name, 8, 1, &value, tx)); 1073088f3894Sahrens } 1074088f3894Sahrens 1075088f3894Sahrens int 1076088f3894Sahrens zap_remove_int(objset_t *os, uint64_t obj, uint64_t value, dmu_tx_t *tx) 1077088f3894Sahrens { 1078088f3894Sahrens char name[20]; 1079088f3894Sahrens 1080088f3894Sahrens (void) snprintf(name, sizeof (name), "%llx", (longlong_t)value); 1081088f3894Sahrens return (zap_remove(os, obj, name, tx)); 1082088f3894Sahrens } 1083088f3894Sahrens 1084088f3894Sahrens int 1085088f3894Sahrens zap_lookup_int(objset_t *os, uint64_t obj, uint64_t value) 1086088f3894Sahrens { 1087088f3894Sahrens char name[20]; 1088088f3894Sahrens 1089088f3894Sahrens (void) snprintf(name, sizeof (name), "%llx", (longlong_t)value); 1090088f3894Sahrens return (zap_lookup(os, obj, name, 8, 1, &value)); 1091088f3894Sahrens } 1092fa9e4066Sahrens 10939966ca11SMatthew Ahrens int 10943f9d6ad7SLin Ling zap_add_int_key(objset_t *os, uint64_t obj, 10953f9d6ad7SLin Ling uint64_t key, uint64_t value, dmu_tx_t *tx) 10963f9d6ad7SLin Ling { 10973f9d6ad7SLin Ling char name[20]; 10983f9d6ad7SLin Ling 10993f9d6ad7SLin Ling (void) snprintf(name, sizeof (name), "%llx", (longlong_t)key); 11003f9d6ad7SLin Ling return (zap_add(os, obj, name, 8, 1, &value, tx)); 11013f9d6ad7SLin Ling } 11023f9d6ad7SLin Ling 1103f1745736SMatthew Ahrens int 1104f1745736SMatthew Ahrens zap_update_int_key(objset_t *os, uint64_t obj, 1105f1745736SMatthew Ahrens uint64_t key, uint64_t value, dmu_tx_t *tx) 1106f1745736SMatthew Ahrens { 1107f1745736SMatthew Ahrens char name[20]; 1108f1745736SMatthew Ahrens 1109f1745736SMatthew Ahrens (void) snprintf(name, sizeof (name), "%llx", (longlong_t)key); 1110f1745736SMatthew Ahrens return (zap_update(os, obj, name, 8, 1, &value, tx)); 1111f1745736SMatthew Ahrens } 1112f1745736SMatthew Ahrens 11133f9d6ad7SLin Ling int 11143f9d6ad7SLin Ling zap_lookup_int_key(objset_t *os, uint64_t obj, uint64_t key, uint64_t *valuep) 11159966ca11SMatthew Ahrens { 11169966ca11SMatthew Ahrens char name[20]; 11173f9d6ad7SLin Ling 11183f9d6ad7SLin Ling (void) snprintf(name, sizeof (name), "%llx", (longlong_t)key); 11193f9d6ad7SLin Ling return (zap_lookup(os, obj, name, 8, 1, valuep)); 11203f9d6ad7SLin Ling } 11213f9d6ad7SLin Ling 11223f9d6ad7SLin Ling int 11233f9d6ad7SLin Ling zap_increment(objset_t *os, uint64_t obj, const char *name, int64_t delta, 11243f9d6ad7SLin Ling dmu_tx_t *tx) 11253f9d6ad7SLin Ling { 11269966ca11SMatthew Ahrens uint64_t value = 0; 11279966ca11SMatthew Ahrens int err; 11289966ca11SMatthew Ahrens 11299966ca11SMatthew Ahrens if (delta == 0) 11309966ca11SMatthew Ahrens return (0); 11319966ca11SMatthew Ahrens 11329966ca11SMatthew Ahrens err = zap_lookup(os, obj, name, 8, 1, &value); 11339966ca11SMatthew Ahrens if (err != 0 && err != ENOENT) 11349966ca11SMatthew Ahrens return (err); 11359966ca11SMatthew Ahrens value += delta; 11369966ca11SMatthew Ahrens if (value == 0) 11379966ca11SMatthew Ahrens err = zap_remove(os, obj, name, tx); 11389966ca11SMatthew Ahrens else 11399966ca11SMatthew Ahrens err = zap_update(os, obj, name, 8, 1, &value, tx); 11409966ca11SMatthew Ahrens return (err); 11419966ca11SMatthew Ahrens } 11429966ca11SMatthew Ahrens 11433f9d6ad7SLin Ling int 11443f9d6ad7SLin Ling zap_increment_int(objset_t *os, uint64_t obj, uint64_t key, int64_t delta, 11453f9d6ad7SLin Ling dmu_tx_t *tx) 11463f9d6ad7SLin Ling { 11473f9d6ad7SLin Ling char name[20]; 11483f9d6ad7SLin Ling 11493f9d6ad7SLin Ling (void) snprintf(name, sizeof (name), "%llx", (longlong_t)key); 11503f9d6ad7SLin Ling return (zap_increment(os, obj, name, delta, tx)); 11513f9d6ad7SLin Ling } 11529966ca11SMatthew Ahrens 1153fa9e4066Sahrens /* 1154fa9e4066Sahrens * Routines for iterating over the attributes. 1155fa9e4066Sahrens */ 1156fa9e4066Sahrens 1157fa9e4066Sahrens int 1158fa9e4066Sahrens fzap_cursor_retrieve(zap_t *zap, zap_cursor_t *zc, zap_attribute_t *za) 1159fa9e4066Sahrens { 1160fa9e4066Sahrens int err = ENOENT; 1161fa9e4066Sahrens zap_entry_handle_t zeh; 1162fa9e4066Sahrens zap_leaf_t *l; 1163fa9e4066Sahrens 1164fa9e4066Sahrens /* retrieve the next entry at or after zc_hash/zc_cd */ 1165fa9e4066Sahrens /* if no entry, return ENOENT */ 1166fa9e4066Sahrens 116787e5029aSahrens if (zc->zc_leaf && 116866328dd3Sahrens (ZAP_HASH_IDX(zc->zc_hash, 1169*c1379625SJustin T. Gibbs zap_leaf_phys(zc->zc_leaf)->l_hdr.lh_prefix_len) != 1170*c1379625SJustin T. Gibbs zap_leaf_phys(zc->zc_leaf)->l_hdr.lh_prefix)) { 117187e5029aSahrens rw_enter(&zc->zc_leaf->l_rwlock, RW_READER); 117287e5029aSahrens zap_put_leaf(zc->zc_leaf); 117387e5029aSahrens zc->zc_leaf = NULL; 117487e5029aSahrens } 117587e5029aSahrens 1176fa9e4066Sahrens again: 117787e5029aSahrens if (zc->zc_leaf == NULL) { 1178ea8dc4b6Seschrock err = zap_deref_leaf(zap, zc->zc_hash, NULL, RW_READER, 1179ea8dc4b6Seschrock &zc->zc_leaf); 1180ea8dc4b6Seschrock if (err != 0) 1181ea8dc4b6Seschrock return (err); 118287e5029aSahrens } else { 118387e5029aSahrens rw_enter(&zc->zc_leaf->l_rwlock, RW_READER); 118487e5029aSahrens } 118587e5029aSahrens l = zc->zc_leaf; 118687e5029aSahrens 1187fa9e4066Sahrens err = zap_leaf_lookup_closest(l, zc->zc_hash, zc->zc_cd, &zeh); 1188fa9e4066Sahrens 1189fa9e4066Sahrens if (err == ENOENT) { 119066328dd3Sahrens uint64_t nocare = 1191*c1379625SJustin T. Gibbs (1ULL << (64 - zap_leaf_phys(l)->l_hdr.lh_prefix_len)) - 1; 1192fa9e4066Sahrens zc->zc_hash = (zc->zc_hash & ~nocare) + nocare + 1; 1193fa9e4066Sahrens zc->zc_cd = 0; 1194*c1379625SJustin T. Gibbs if (zap_leaf_phys(l)->l_hdr.lh_prefix_len == 0 || 1195*c1379625SJustin T. Gibbs zc->zc_hash == 0) { 1196fa9e4066Sahrens zc->zc_hash = -1ULL; 1197fa9e4066Sahrens } else { 119887e5029aSahrens zap_put_leaf(zc->zc_leaf); 119987e5029aSahrens zc->zc_leaf = NULL; 1200fa9e4066Sahrens goto again; 1201fa9e4066Sahrens } 1202fa9e4066Sahrens } 1203fa9e4066Sahrens 1204fa9e4066Sahrens if (err == 0) { 1205fa9e4066Sahrens zc->zc_hash = zeh.zeh_hash; 1206fa9e4066Sahrens zc->zc_cd = zeh.zeh_cd; 1207fa9e4066Sahrens za->za_integer_length = zeh.zeh_integer_size; 1208fa9e4066Sahrens za->za_num_integers = zeh.zeh_num_integers; 1209fa9e4066Sahrens if (zeh.zeh_num_integers == 0) { 1210fa9e4066Sahrens za->za_first_integer = 0; 1211fa9e4066Sahrens } else { 1212fa9e4066Sahrens err = zap_entry_read(&zeh, 8, 1, &za->za_first_integer); 1213fa9e4066Sahrens ASSERT(err == 0 || err == EOVERFLOW); 1214fa9e4066Sahrens } 1215b24ab676SJeff Bonwick err = zap_entry_read_name(zap, &zeh, 1216fa9e4066Sahrens sizeof (za->za_name), za->za_name); 1217fa9e4066Sahrens ASSERT(err == 0); 1218da6c28aaSamw 1219da6c28aaSamw za->za_normalization_conflict = 1220da6c28aaSamw zap_entry_normalization_conflict(&zeh, 1221da6c28aaSamw NULL, za->za_name, zap); 1222fa9e4066Sahrens } 122387e5029aSahrens rw_exit(&zc->zc_leaf->l_rwlock); 1224fa9e4066Sahrens return (err); 1225fa9e4066Sahrens } 1226fa9e4066Sahrens 1227fa9e4066Sahrens static void 1228fa9e4066Sahrens zap_stats_ptrtbl(zap_t *zap, uint64_t *tbl, int len, zap_stats_t *zs) 1229fa9e4066Sahrens { 1230ea8dc4b6Seschrock int i, err; 1231fa9e4066Sahrens uint64_t lastblk = 0; 1232fa9e4066Sahrens 1233fa9e4066Sahrens /* 1234fa9e4066Sahrens * NB: if a leaf has more pointers than an entire ptrtbl block 1235fa9e4066Sahrens * can hold, then it'll be accounted for more than once, since 1236fa9e4066Sahrens * we won't have lastblk. 1237fa9e4066Sahrens */ 1238fa9e4066Sahrens for (i = 0; i < len; i++) { 1239fa9e4066Sahrens zap_leaf_t *l; 1240fa9e4066Sahrens 1241fa9e4066Sahrens if (tbl[i] == lastblk) 1242fa9e4066Sahrens continue; 1243fa9e4066Sahrens lastblk = tbl[i]; 1244fa9e4066Sahrens 1245ea8dc4b6Seschrock err = zap_get_leaf_byblk(zap, tbl[i], NULL, RW_READER, &l); 1246ea8dc4b6Seschrock if (err == 0) { 124766328dd3Sahrens zap_leaf_stats(zap, l, zs); 1248ea8dc4b6Seschrock zap_put_leaf(l); 1249ea8dc4b6Seschrock } 1250fa9e4066Sahrens } 1251fa9e4066Sahrens } 1252fa9e4066Sahrens 1253fa9e4066Sahrens void 1254fa9e4066Sahrens fzap_get_stats(zap_t *zap, zap_stats_t *zs) 1255fa9e4066Sahrens { 1256f65e61c0Sahrens int bs = FZAP_BLOCK_SHIFT(zap); 1257f65e61c0Sahrens zs->zs_blocksize = 1ULL << bs; 12588248818dSnd 12598248818dSnd /* 12608248818dSnd * Set zap_phys_t fields 12618248818dSnd */ 1262*c1379625SJustin T. Gibbs zs->zs_num_leafs = zap_f_phys(zap)->zap_num_leafs; 1263*c1379625SJustin T. Gibbs zs->zs_num_entries = zap_f_phys(zap)->zap_num_entries; 1264*c1379625SJustin T. Gibbs zs->zs_num_blocks = zap_f_phys(zap)->zap_freeblk; 1265*c1379625SJustin T. Gibbs zs->zs_block_type = zap_f_phys(zap)->zap_block_type; 1266*c1379625SJustin T. Gibbs zs->zs_magic = zap_f_phys(zap)->zap_magic; 1267*c1379625SJustin T. Gibbs zs->zs_salt = zap_f_phys(zap)->zap_salt; 12688248818dSnd 12698248818dSnd /* 12708248818dSnd * Set zap_ptrtbl fields 12718248818dSnd */ 1272*c1379625SJustin T. Gibbs zs->zs_ptrtbl_len = 1ULL << zap_f_phys(zap)->zap_ptrtbl.zt_shift; 1273*c1379625SJustin T. Gibbs zs->zs_ptrtbl_nextblk = zap_f_phys(zap)->zap_ptrtbl.zt_nextblk; 12748248818dSnd zs->zs_ptrtbl_blks_copied = 1275*c1379625SJustin T. Gibbs zap_f_phys(zap)->zap_ptrtbl.zt_blks_copied; 1276*c1379625SJustin T. Gibbs zs->zs_ptrtbl_zt_blk = zap_f_phys(zap)->zap_ptrtbl.zt_blk; 1277*c1379625SJustin T. Gibbs zs->zs_ptrtbl_zt_numblks = zap_f_phys(zap)->zap_ptrtbl.zt_numblks; 1278*c1379625SJustin T. Gibbs zs->zs_ptrtbl_zt_shift = zap_f_phys(zap)->zap_ptrtbl.zt_shift; 1279fa9e4066Sahrens 1280*c1379625SJustin T. Gibbs if (zap_f_phys(zap)->zap_ptrtbl.zt_numblks == 0) { 1281fa9e4066Sahrens /* the ptrtbl is entirely in the header block. */ 1282f65e61c0Sahrens zap_stats_ptrtbl(zap, &ZAP_EMBEDDED_PTRTBL_ENT(zap, 0), 1283f65e61c0Sahrens 1 << ZAP_EMBEDDED_PTRTBL_SHIFT(zap), zs); 1284fa9e4066Sahrens } else { 1285fa9e4066Sahrens int b; 1286fa9e4066Sahrens 1287fa9e4066Sahrens dmu_prefetch(zap->zap_objset, zap->zap_object, 1288*c1379625SJustin T. Gibbs zap_f_phys(zap)->zap_ptrtbl.zt_blk << bs, 1289*c1379625SJustin T. Gibbs zap_f_phys(zap)->zap_ptrtbl.zt_numblks << bs); 1290fa9e4066Sahrens 1291*c1379625SJustin T. Gibbs for (b = 0; b < zap_f_phys(zap)->zap_ptrtbl.zt_numblks; 1292fa9e4066Sahrens b++) { 1293fa9e4066Sahrens dmu_buf_t *db; 1294ea8dc4b6Seschrock int err; 1295ea8dc4b6Seschrock 1296ea8dc4b6Seschrock err = dmu_buf_hold(zap->zap_objset, zap->zap_object, 1297*c1379625SJustin T. Gibbs (zap_f_phys(zap)->zap_ptrtbl.zt_blk + b) << bs, 129847cb52daSJeff Bonwick FTAG, &db, DMU_READ_NO_PREFETCH); 1299ea8dc4b6Seschrock if (err == 0) { 1300ea8dc4b6Seschrock zap_stats_ptrtbl(zap, db->db_data, 1301ea8dc4b6Seschrock 1<<(bs-3), zs); 1302ea8dc4b6Seschrock dmu_buf_rele(db, FTAG); 1303ea8dc4b6Seschrock } 1304fa9e4066Sahrens } 1305fa9e4066Sahrens } 1306fa9e4066Sahrens } 13073d692628SSanjeev Bagewadi 13083d692628SSanjeev Bagewadi int 13093d692628SSanjeev Bagewadi fzap_count_write(zap_name_t *zn, int add, uint64_t *towrite, 13103d692628SSanjeev Bagewadi uint64_t *tooverwrite) 13113d692628SSanjeev Bagewadi { 13123d692628SSanjeev Bagewadi zap_t *zap = zn->zn_zap; 13133d692628SSanjeev Bagewadi zap_leaf_t *l; 13143d692628SSanjeev Bagewadi int err; 13153d692628SSanjeev Bagewadi 13163d692628SSanjeev Bagewadi /* 13173d692628SSanjeev Bagewadi * Account for the header block of the fatzap. 13183d692628SSanjeev Bagewadi */ 13193d692628SSanjeev Bagewadi if (!add && dmu_buf_freeable(zap->zap_dbuf)) { 132012a2833aSSanjeev Bagewadi *tooverwrite += zap->zap_dbuf->db_size; 13213d692628SSanjeev Bagewadi } else { 132212a2833aSSanjeev Bagewadi *towrite += zap->zap_dbuf->db_size; 13233d692628SSanjeev Bagewadi } 13243d692628SSanjeev Bagewadi 13253d692628SSanjeev Bagewadi /* 13263d692628SSanjeev Bagewadi * Account for the pointer table blocks. 13273d692628SSanjeev Bagewadi * If we are adding we need to account for the following cases : 13283d692628SSanjeev Bagewadi * - If the pointer table is embedded, this operation could force an 13293d692628SSanjeev Bagewadi * external pointer table. 13303d692628SSanjeev Bagewadi * - If this already has an external pointer table this operation 13313d692628SSanjeev Bagewadi * could extend the table. 13323d692628SSanjeev Bagewadi */ 13333d692628SSanjeev Bagewadi if (add) { 1334*c1379625SJustin T. Gibbs if (zap_f_phys(zap)->zap_ptrtbl.zt_blk == 0) 133512a2833aSSanjeev Bagewadi *towrite += zap->zap_dbuf->db_size; 13363d692628SSanjeev Bagewadi else 133712a2833aSSanjeev Bagewadi *towrite += (zap->zap_dbuf->db_size * 3); 13383d692628SSanjeev Bagewadi } 13393d692628SSanjeev Bagewadi 13403d692628SSanjeev Bagewadi /* 13413d692628SSanjeev Bagewadi * Now, check if the block containing leaf is freeable 13423d692628SSanjeev Bagewadi * and account accordingly. 13433d692628SSanjeev Bagewadi */ 13443d692628SSanjeev Bagewadi err = zap_deref_leaf(zap, zn->zn_hash, NULL, RW_READER, &l); 13453d692628SSanjeev Bagewadi if (err != 0) { 13463d692628SSanjeev Bagewadi return (err); 13473d692628SSanjeev Bagewadi } 13483d692628SSanjeev Bagewadi 13493d692628SSanjeev Bagewadi if (!add && dmu_buf_freeable(l->l_dbuf)) { 135012a2833aSSanjeev Bagewadi *tooverwrite += l->l_dbuf->db_size; 13513d692628SSanjeev Bagewadi } else { 13523d692628SSanjeev Bagewadi /* 13533d692628SSanjeev Bagewadi * If this an add operation, the leaf block could split. 13543d692628SSanjeev Bagewadi * Hence, we need to account for an additional leaf block. 13553d692628SSanjeev Bagewadi */ 135612a2833aSSanjeev Bagewadi *towrite += (add ? 2 : 1) * l->l_dbuf->db_size; 13573d692628SSanjeev Bagewadi } 13583d692628SSanjeev Bagewadi 13593d692628SSanjeev Bagewadi zap_put_leaf(l); 13603d692628SSanjeev Bagewadi return (0); 13613d692628SSanjeev Bagewadi } 1362