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. 23ae972795SMatthew Ahrens * Copyright (c) 2012, 2016 by Delphix. All rights reserved. 24bc9014e6SJustin Gibbs * Copyright (c) 2014 Spectra Logic Corporation, All rights reserved. 25fa9e4066Sahrens */ 26fa9e4066Sahrens 27fa9e4066Sahrens /* 28fa9e4066Sahrens * This file contains the top half of the zfs directory structure 29fa9e4066Sahrens * implementation. The bottom half is in zap_leaf.c. 30fa9e4066Sahrens * 31fa9e4066Sahrens * The zdir is an extendable hash data structure. There is a table of 32fa9e4066Sahrens * pointers to buckets (zap_t->zd_data->zd_leafs). The buckets are 33fa9e4066Sahrens * each a constant size and hold a variable number of directory entries. 34fa9e4066Sahrens * The buckets (aka "leaf nodes") are implemented in zap_leaf.c. 35fa9e4066Sahrens * 36fa9e4066Sahrens * The pointer table holds a power of 2 number of pointers. 37fa9e4066Sahrens * (1<<zap_t->zd_data->zd_phys->zd_prefix_len). The bucket pointed to 38fa9e4066Sahrens * by the pointer at index i in the table holds entries whose hash value 39fa9e4066Sahrens * has a zd_prefix_len - bit prefix 40fa9e4066Sahrens */ 41fa9e4066Sahrens 42fa9e4066Sahrens #include <sys/spa.h> 43fa9e4066Sahrens #include <sys/dmu.h> 44fa9e4066Sahrens #include <sys/zfs_context.h> 45de8267e0Stimh #include <sys/zfs_znode.h> 46478ed9adSEric Taylor #include <sys/fs/zfs.h> 47fa9e4066Sahrens #include <sys/zap.h> 48ea8dc4b6Seschrock #include <sys/refcount.h> 49fa9e4066Sahrens #include <sys/zap_impl.h> 50fa9e4066Sahrens #include <sys/zap_leaf.h> 51fa9e4066Sahrens 52f65e61c0Sahrens int fzap_default_block_shift = 14; /* 16k blocksize */ 53fa9e4066Sahrens 54c1379625SJustin T. Gibbs extern inline zap_phys_t *zap_f_phys(zap_t *zap); 55c1379625SJustin T. Gibbs 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 84bc9014e6SJustin Gibbs zap->zap_dbu.dbu_evict_func = 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 89c1379625SJustin 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); 165a2cdcdd2SPaul Dagnelie dmu_prefetch(zap->zap_objset, zap->zap_object, 0, 166a2cdcdd2SPaul Dagnelie tbl->zt_blk << bs, tbl->zt_numblks << bs, 167a2cdcdd2SPaul Dagnelie ZIO_PRIORITY_SYNC_READ); 168fa9e4066Sahrens } 169fa9e4066Sahrens 170fa9e4066Sahrens /* 17166328dd3Sahrens * Copy the ptrtbl from the old to new location. 172fa9e4066Sahrens */ 173fa9e4066Sahrens 174fa9e4066Sahrens b = tbl->zt_blks_copied; 175ea8dc4b6Seschrock err = dmu_buf_hold(zap->zap_objset, zap->zap_object, 17647cb52daSJeff Bonwick (tbl->zt_blk + b) << bs, FTAG, &db_old, DMU_READ_NO_PREFETCH); 177ea8dc4b6Seschrock if (err) 17866328dd3Sahrens return (err); 179fa9e4066Sahrens 180fa9e4066Sahrens /* first half of entries in old[b] go to new[2*b+0] */ 181ea8dc4b6Seschrock VERIFY(0 == dmu_buf_hold(zap->zap_objset, zap->zap_object, 18247cb52daSJeff Bonwick (newblk + 2*b+0) << bs, FTAG, &db_new, DMU_READ_NO_PREFETCH)); 183fa9e4066Sahrens dmu_buf_will_dirty(db_new, tx); 184fa9e4066Sahrens transfer_func(db_old->db_data, db_new->db_data, hepb); 185ea8dc4b6Seschrock dmu_buf_rele(db_new, FTAG); 186fa9e4066Sahrens 187fa9e4066Sahrens /* second half of entries in old[b] go to new[2*b+1] */ 188ea8dc4b6Seschrock VERIFY(0 == dmu_buf_hold(zap->zap_objset, zap->zap_object, 18947cb52daSJeff Bonwick (newblk + 2*b+1) << bs, FTAG, &db_new, DMU_READ_NO_PREFETCH)); 190fa9e4066Sahrens dmu_buf_will_dirty(db_new, tx); 191fa9e4066Sahrens transfer_func((uint64_t *)db_old->db_data + hepb, 192fa9e4066Sahrens db_new->db_data, hepb); 193ea8dc4b6Seschrock dmu_buf_rele(db_new, FTAG); 194fa9e4066Sahrens 195ea8dc4b6Seschrock dmu_buf_rele(db_old, FTAG); 196fa9e4066Sahrens 197fa9e4066Sahrens tbl->zt_blks_copied++; 198fa9e4066Sahrens 199fa9e4066Sahrens dprintf("copied block %llu of %llu\n", 200fa9e4066Sahrens tbl->zt_blks_copied, tbl->zt_numblks); 201fa9e4066Sahrens 202fa9e4066Sahrens if (tbl->zt_blks_copied == tbl->zt_numblks) { 203ea8dc4b6Seschrock (void) dmu_free_range(zap->zap_objset, zap->zap_object, 204f65e61c0Sahrens tbl->zt_blk << bs, tbl->zt_numblks << bs, tx); 205fa9e4066Sahrens 206fa9e4066Sahrens tbl->zt_blk = newblk; 207fa9e4066Sahrens tbl->zt_numblks *= 2; 208fa9e4066Sahrens tbl->zt_shift++; 209fa9e4066Sahrens tbl->zt_nextblk = 0; 210fa9e4066Sahrens tbl->zt_blks_copied = 0; 211fa9e4066Sahrens 212fa9e4066Sahrens dprintf("finished; numblocks now %llu (%lluk entries)\n", 213fa9e4066Sahrens tbl->zt_numblks, 1<<(tbl->zt_shift-10)); 214fa9e4066Sahrens } 21566328dd3Sahrens 21666328dd3Sahrens return (0); 217fa9e4066Sahrens } 218fa9e4066Sahrens 219ea8dc4b6Seschrock static int 220fa9e4066Sahrens zap_table_store(zap_t *zap, zap_table_phys_t *tbl, uint64_t idx, uint64_t val, 221fa9e4066Sahrens dmu_tx_t *tx) 222fa9e4066Sahrens { 223ea8dc4b6Seschrock int err; 224ea8dc4b6Seschrock uint64_t blk, off; 225f65e61c0Sahrens int bs = FZAP_BLOCK_SHIFT(zap); 226ea8dc4b6Seschrock dmu_buf_t *db; 227fa9e4066Sahrens 228fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 229fa9e4066Sahrens ASSERT(tbl->zt_blk != 0); 230fa9e4066Sahrens 231fa9e4066Sahrens dprintf("storing %llx at index %llx\n", val, idx); 232fa9e4066Sahrens 233f65e61c0Sahrens blk = idx >> (bs-3); 234f65e61c0Sahrens off = idx & ((1<<(bs-3))-1); 235fa9e4066Sahrens 236ea8dc4b6Seschrock err = dmu_buf_hold(zap->zap_objset, zap->zap_object, 23747cb52daSJeff Bonwick (tbl->zt_blk + blk) << bs, FTAG, &db, DMU_READ_NO_PREFETCH); 238ea8dc4b6Seschrock if (err) 239ea8dc4b6Seschrock return (err); 240fa9e4066Sahrens dmu_buf_will_dirty(db, tx); 241fa9e4066Sahrens 242fa9e4066Sahrens if (tbl->zt_nextblk != 0) { 243ea8dc4b6Seschrock uint64_t idx2 = idx * 2; 244ea8dc4b6Seschrock uint64_t blk2 = idx2 >> (bs-3); 245ea8dc4b6Seschrock uint64_t off2 = idx2 & ((1<<(bs-3))-1); 246ea8dc4b6Seschrock dmu_buf_t *db2; 247ea8dc4b6Seschrock 248ea8dc4b6Seschrock err = dmu_buf_hold(zap->zap_objset, zap->zap_object, 24947cb52daSJeff Bonwick (tbl->zt_nextblk + blk2) << bs, FTAG, &db2, 25047cb52daSJeff Bonwick DMU_READ_NO_PREFETCH); 251ea8dc4b6Seschrock if (err) { 252ea8dc4b6Seschrock dmu_buf_rele(db, FTAG); 253ea8dc4b6Seschrock return (err); 254ea8dc4b6Seschrock } 255ea8dc4b6Seschrock dmu_buf_will_dirty(db2, tx); 256ea8dc4b6Seschrock ((uint64_t *)db2->db_data)[off2] = val; 257ea8dc4b6Seschrock ((uint64_t *)db2->db_data)[off2+1] = val; 258ea8dc4b6Seschrock dmu_buf_rele(db2, FTAG); 259fa9e4066Sahrens } 260fa9e4066Sahrens 261ea8dc4b6Seschrock ((uint64_t *)db->db_data)[off] = val; 262ea8dc4b6Seschrock dmu_buf_rele(db, FTAG); 263ea8dc4b6Seschrock 264ea8dc4b6Seschrock return (0); 265fa9e4066Sahrens } 266fa9e4066Sahrens 267ea8dc4b6Seschrock static int 268ea8dc4b6Seschrock zap_table_load(zap_t *zap, zap_table_phys_t *tbl, uint64_t idx, uint64_t *valp) 269fa9e4066Sahrens { 270ea8dc4b6Seschrock uint64_t blk, off; 271ea8dc4b6Seschrock int err; 272fa9e4066Sahrens dmu_buf_t *db; 273*79d72832SMatthew Ahrens dnode_t *dn; 274f65e61c0Sahrens int bs = FZAP_BLOCK_SHIFT(zap); 275fa9e4066Sahrens 276fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 277fa9e4066Sahrens 278f65e61c0Sahrens blk = idx >> (bs-3); 279f65e61c0Sahrens off = idx & ((1<<(bs-3))-1); 280fa9e4066Sahrens 281*79d72832SMatthew Ahrens /* 282*79d72832SMatthew Ahrens * Note: this is equivalent to dmu_buf_hold(), but we use 283*79d72832SMatthew Ahrens * _dnode_enter / _by_dnode because it's faster because we don't 284*79d72832SMatthew Ahrens * have to hold the dnode. 285*79d72832SMatthew Ahrens */ 286*79d72832SMatthew Ahrens dn = dmu_buf_dnode_enter(zap->zap_dbuf); 287*79d72832SMatthew Ahrens err = dmu_buf_hold_by_dnode(dn, 28847cb52daSJeff Bonwick (tbl->zt_blk + blk) << bs, FTAG, &db, DMU_READ_NO_PREFETCH); 289*79d72832SMatthew Ahrens dmu_buf_dnode_exit(zap->zap_dbuf); 290ea8dc4b6Seschrock if (err) 291ea8dc4b6Seschrock return (err); 292ea8dc4b6Seschrock *valp = ((uint64_t *)db->db_data)[off]; 293ea8dc4b6Seschrock dmu_buf_rele(db, FTAG); 294ea8dc4b6Seschrock 295ea8dc4b6Seschrock if (tbl->zt_nextblk != 0) { 296ea8dc4b6Seschrock /* 297ea8dc4b6Seschrock * read the nextblk for the sake of i/o error checking, 298ea8dc4b6Seschrock * so that zap_table_load() will catch errors for 299ea8dc4b6Seschrock * zap_table_store. 300ea8dc4b6Seschrock */ 301ea8dc4b6Seschrock blk = (idx*2) >> (bs-3); 302ea8dc4b6Seschrock 303*79d72832SMatthew Ahrens dn = dmu_buf_dnode_enter(zap->zap_dbuf); 304*79d72832SMatthew Ahrens err = dmu_buf_hold_by_dnode(dn, 30547cb52daSJeff Bonwick (tbl->zt_nextblk + blk) << bs, FTAG, &db, 30647cb52daSJeff Bonwick DMU_READ_NO_PREFETCH); 307*79d72832SMatthew Ahrens dmu_buf_dnode_exit(zap->zap_dbuf); 308b287be1bSWill Andrews if (err == 0) 309b287be1bSWill Andrews dmu_buf_rele(db, FTAG); 310ea8dc4b6Seschrock } 311ea8dc4b6Seschrock return (err); 312fa9e4066Sahrens } 313fa9e4066Sahrens 314fa9e4066Sahrens /* 315fa9e4066Sahrens * Routines for growing the ptrtbl. 316fa9e4066Sahrens */ 317fa9e4066Sahrens 318fa9e4066Sahrens static void 319fa9e4066Sahrens zap_ptrtbl_transfer(const uint64_t *src, uint64_t *dst, int n) 320fa9e4066Sahrens { 321fa9e4066Sahrens int i; 322fa9e4066Sahrens for (i = 0; i < n; i++) { 323fa9e4066Sahrens uint64_t lb = src[i]; 324fa9e4066Sahrens dst[2*i+0] = lb; 325fa9e4066Sahrens dst[2*i+1] = lb; 326fa9e4066Sahrens } 327fa9e4066Sahrens } 328fa9e4066Sahrens 32966328dd3Sahrens static int 330fa9e4066Sahrens zap_grow_ptrtbl(zap_t *zap, dmu_tx_t *tx) 331fa9e4066Sahrens { 332b24ab676SJeff Bonwick /* 333b24ab676SJeff Bonwick * The pointer table should never use more hash bits than we 334b24ab676SJeff Bonwick * have (otherwise we'd be using useless zero bits to index it). 335b24ab676SJeff Bonwick * If we are within 2 bits of running out, stop growing, since 336b24ab676SJeff Bonwick * this is already an aberrant condition. 337b24ab676SJeff Bonwick */ 338c1379625SJustin T. Gibbs if (zap_f_phys(zap)->zap_ptrtbl.zt_shift >= zap_hashbits(zap) - 2) 339be6fd75aSMatthew Ahrens return (SET_ERROR(ENOSPC)); 340fa9e4066Sahrens 341c1379625SJustin T. Gibbs if (zap_f_phys(zap)->zap_ptrtbl.zt_numblks == 0) { 342fa9e4066Sahrens /* 343f65e61c0Sahrens * We are outgrowing the "embedded" ptrtbl (the one 344f65e61c0Sahrens * stored in the header block). Give it its own entire 345f65e61c0Sahrens * block, which will double the size of the ptrtbl. 346fa9e4066Sahrens */ 347fa9e4066Sahrens uint64_t newblk; 348fa9e4066Sahrens dmu_buf_t *db_new; 349ea8dc4b6Seschrock int err; 350fa9e4066Sahrens 351c1379625SJustin T. Gibbs ASSERT3U(zap_f_phys(zap)->zap_ptrtbl.zt_shift, ==, 352f65e61c0Sahrens ZAP_EMBEDDED_PTRTBL_SHIFT(zap)); 353c1379625SJustin T. Gibbs ASSERT0(zap_f_phys(zap)->zap_ptrtbl.zt_blk); 354fa9e4066Sahrens 35566328dd3Sahrens newblk = zap_allocate_blocks(zap, 1); 356ea8dc4b6Seschrock err = dmu_buf_hold(zap->zap_objset, zap->zap_object, 35747cb52daSJeff Bonwick newblk << FZAP_BLOCK_SHIFT(zap), FTAG, &db_new, 35847cb52daSJeff Bonwick DMU_READ_NO_PREFETCH); 359ea8dc4b6Seschrock if (err) 36066328dd3Sahrens return (err); 361fa9e4066Sahrens dmu_buf_will_dirty(db_new, tx); 362f65e61c0Sahrens zap_ptrtbl_transfer(&ZAP_EMBEDDED_PTRTBL_ENT(zap, 0), 363f65e61c0Sahrens db_new->db_data, 1 << ZAP_EMBEDDED_PTRTBL_SHIFT(zap)); 364ea8dc4b6Seschrock dmu_buf_rele(db_new, FTAG); 365fa9e4066Sahrens 366c1379625SJustin T. Gibbs zap_f_phys(zap)->zap_ptrtbl.zt_blk = newblk; 367c1379625SJustin T. Gibbs zap_f_phys(zap)->zap_ptrtbl.zt_numblks = 1; 368c1379625SJustin T. Gibbs zap_f_phys(zap)->zap_ptrtbl.zt_shift++; 369fa9e4066Sahrens 370c1379625SJustin T. Gibbs ASSERT3U(1ULL << zap_f_phys(zap)->zap_ptrtbl.zt_shift, ==, 371c1379625SJustin T. Gibbs zap_f_phys(zap)->zap_ptrtbl.zt_numblks << 372f65e61c0Sahrens (FZAP_BLOCK_SHIFT(zap)-3)); 37366328dd3Sahrens 37466328dd3Sahrens return (0); 375fa9e4066Sahrens } else { 376c1379625SJustin T. Gibbs return (zap_table_grow(zap, &zap_f_phys(zap)->zap_ptrtbl, 37766328dd3Sahrens zap_ptrtbl_transfer, tx)); 378fa9e4066Sahrens } 379fa9e4066Sahrens } 380fa9e4066Sahrens 381fa9e4066Sahrens static void 382fa9e4066Sahrens zap_increment_num_entries(zap_t *zap, int delta, dmu_tx_t *tx) 383fa9e4066Sahrens { 384fa9e4066Sahrens dmu_buf_will_dirty(zap->zap_dbuf, tx); 385fa9e4066Sahrens mutex_enter(&zap->zap_f.zap_num_entries_mtx); 386c1379625SJustin T. Gibbs ASSERT(delta > 0 || zap_f_phys(zap)->zap_num_entries >= -delta); 387c1379625SJustin T. Gibbs zap_f_phys(zap)->zap_num_entries += delta; 388fa9e4066Sahrens mutex_exit(&zap->zap_f.zap_num_entries_mtx); 389fa9e4066Sahrens } 390fa9e4066Sahrens 39166328dd3Sahrens static uint64_t 39266328dd3Sahrens zap_allocate_blocks(zap_t *zap, int nblocks) 393fa9e4066Sahrens { 394fa9e4066Sahrens uint64_t newblk; 39566328dd3Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 396c1379625SJustin T. Gibbs newblk = zap_f_phys(zap)->zap_freeblk; 397c1379625SJustin T. Gibbs zap_f_phys(zap)->zap_freeblk += nblocks; 398fa9e4066Sahrens return (newblk); 399fa9e4066Sahrens } 400fa9e4066Sahrens 401bc9014e6SJustin Gibbs static void 402bc9014e6SJustin Gibbs zap_leaf_pageout(void *dbu) 403bc9014e6SJustin Gibbs { 404bc9014e6SJustin Gibbs zap_leaf_t *l = dbu; 405bc9014e6SJustin Gibbs 406bc9014e6SJustin Gibbs rw_destroy(&l->l_rwlock); 407bc9014e6SJustin Gibbs kmem_free(l, sizeof (zap_leaf_t)); 408bc9014e6SJustin Gibbs } 409bc9014e6SJustin Gibbs 41066328dd3Sahrens static zap_leaf_t * 411fa9e4066Sahrens zap_create_leaf(zap_t *zap, dmu_tx_t *tx) 412fa9e4066Sahrens { 413fa9e4066Sahrens void *winner; 414bc9014e6SJustin Gibbs zap_leaf_t *l = kmem_zalloc(sizeof (zap_leaf_t), KM_SLEEP); 415fa9e4066Sahrens 416fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 417fa9e4066Sahrens 418fa9e4066Sahrens rw_init(&l->l_rwlock, 0, 0, 0); 419fa9e4066Sahrens rw_enter(&l->l_rwlock, RW_WRITER); 42066328dd3Sahrens l->l_blkid = zap_allocate_blocks(zap, 1); 421fa9e4066Sahrens l->l_dbuf = NULL; 422fa9e4066Sahrens 423ea8dc4b6Seschrock VERIFY(0 == dmu_buf_hold(zap->zap_objset, zap->zap_object, 42447cb52daSJeff Bonwick l->l_blkid << FZAP_BLOCK_SHIFT(zap), NULL, &l->l_dbuf, 42547cb52daSJeff Bonwick DMU_READ_NO_PREFETCH)); 426bc9014e6SJustin Gibbs dmu_buf_init_user(&l->l_dbu, zap_leaf_pageout, &l->l_dbuf); 427bc9014e6SJustin Gibbs winner = dmu_buf_set_user(l->l_dbuf, &l->l_dbu); 428fa9e4066Sahrens ASSERT(winner == NULL); 429fa9e4066Sahrens dmu_buf_will_dirty(l->l_dbuf, tx); 430fa9e4066Sahrens 431de8267e0Stimh zap_leaf_init(l, zap->zap_normflags != 0); 432fa9e4066Sahrens 433c1379625SJustin T. Gibbs zap_f_phys(zap)->zap_num_leafs++; 434fa9e4066Sahrens 43566328dd3Sahrens return (l); 436fa9e4066Sahrens } 437fa9e4066Sahrens 438fa9e4066Sahrens int 439fa9e4066Sahrens fzap_count(zap_t *zap, uint64_t *count) 440fa9e4066Sahrens { 441fa9e4066Sahrens ASSERT(!zap->zap_ismicro); 442fa9e4066Sahrens mutex_enter(&zap->zap_f.zap_num_entries_mtx); /* unnecessary */ 443c1379625SJustin T. Gibbs *count = zap_f_phys(zap)->zap_num_entries; 444fa9e4066Sahrens mutex_exit(&zap->zap_f.zap_num_entries_mtx); 445fa9e4066Sahrens return (0); 446fa9e4066Sahrens } 447fa9e4066Sahrens 448fa9e4066Sahrens /* 449fa9e4066Sahrens * Routines for obtaining zap_leaf_t's 450fa9e4066Sahrens */ 451fa9e4066Sahrens 45287e5029aSahrens void 453fa9e4066Sahrens zap_put_leaf(zap_leaf_t *l) 454fa9e4066Sahrens { 455fa9e4066Sahrens rw_exit(&l->l_rwlock); 456ea8dc4b6Seschrock dmu_buf_rele(l->l_dbuf, NULL); 457fa9e4066Sahrens } 458fa9e4066Sahrens 459fa9e4066Sahrens static zap_leaf_t * 460fa9e4066Sahrens zap_open_leaf(uint64_t blkid, dmu_buf_t *db) 461fa9e4066Sahrens { 462fa9e4066Sahrens zap_leaf_t *l, *winner; 463fa9e4066Sahrens 464fa9e4066Sahrens ASSERT(blkid != 0); 465fa9e4066Sahrens 466bc9014e6SJustin Gibbs l = kmem_zalloc(sizeof (zap_leaf_t), KM_SLEEP); 467fa9e4066Sahrens rw_init(&l->l_rwlock, 0, 0, 0); 468fa9e4066Sahrens rw_enter(&l->l_rwlock, RW_WRITER); 469fa9e4066Sahrens l->l_blkid = blkid; 470bf16b11eSMatthew Ahrens l->l_bs = highbit64(db->db_size) - 1; 471fa9e4066Sahrens l->l_dbuf = db; 472fa9e4066Sahrens 473bc9014e6SJustin Gibbs dmu_buf_init_user(&l->l_dbu, zap_leaf_pageout, &l->l_dbuf); 474bc9014e6SJustin Gibbs winner = dmu_buf_set_user(db, &l->l_dbu); 475fa9e4066Sahrens 476fa9e4066Sahrens rw_exit(&l->l_rwlock); 477fa9e4066Sahrens if (winner != NULL) { 478fa9e4066Sahrens /* someone else set it first */ 479bc9014e6SJustin Gibbs zap_leaf_pageout(&l->l_dbu); 480fa9e4066Sahrens l = winner; 481fa9e4066Sahrens } 482fa9e4066Sahrens 48366328dd3Sahrens /* 48466328dd3Sahrens * lhr_pad was previously used for the next leaf in the leaf 48566328dd3Sahrens * chain. There should be no chained leafs (as we have removed 48666328dd3Sahrens * support for them). 48766328dd3Sahrens */ 488c1379625SJustin T. Gibbs ASSERT0(zap_leaf_phys(l)->l_hdr.lh_pad1); 48966328dd3Sahrens 490f65e61c0Sahrens /* 491f65e61c0Sahrens * There should be more hash entries than there can be 492f65e61c0Sahrens * chunks to put in the hash table 493f65e61c0Sahrens */ 494f65e61c0Sahrens ASSERT3U(ZAP_LEAF_HASH_NUMENTRIES(l), >, ZAP_LEAF_NUMCHUNKS(l) / 3); 495f65e61c0Sahrens 496f65e61c0Sahrens /* The chunks should begin at the end of the hash table */ 497f65e61c0Sahrens ASSERT3P(&ZAP_LEAF_CHUNK(l, 0), ==, 498c1379625SJustin T. Gibbs &zap_leaf_phys(l)->l_hash[ZAP_LEAF_HASH_NUMENTRIES(l)]); 499f65e61c0Sahrens 500f65e61c0Sahrens /* The chunks should end at the end of the block */ 501f65e61c0Sahrens ASSERT3U((uintptr_t)&ZAP_LEAF_CHUNK(l, ZAP_LEAF_NUMCHUNKS(l)) - 502c1379625SJustin T. Gibbs (uintptr_t)zap_leaf_phys(l), ==, l->l_dbuf->db_size); 503f65e61c0Sahrens 504fa9e4066Sahrens return (l); 505fa9e4066Sahrens } 506fa9e4066Sahrens 507ea8dc4b6Seschrock static int 50866328dd3Sahrens zap_get_leaf_byblk(zap_t *zap, uint64_t blkid, dmu_tx_t *tx, krw_t lt, 509ea8dc4b6Seschrock zap_leaf_t **lp) 510fa9e4066Sahrens { 511fa9e4066Sahrens dmu_buf_t *db; 512fa9e4066Sahrens zap_leaf_t *l; 513f65e61c0Sahrens int bs = FZAP_BLOCK_SHIFT(zap); 514ea8dc4b6Seschrock int err; 515fa9e4066Sahrens 516fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 517fa9e4066Sahrens 518*79d72832SMatthew Ahrens dnode_t *dn = dmu_buf_dnode_enter(zap->zap_dbuf); 519*79d72832SMatthew Ahrens err = dmu_buf_hold_by_dnode(dn, 52047cb52daSJeff Bonwick blkid << bs, NULL, &db, DMU_READ_NO_PREFETCH); 521*79d72832SMatthew Ahrens dmu_buf_dnode_exit(zap->zap_dbuf); 522ea8dc4b6Seschrock if (err) 523ea8dc4b6Seschrock return (err); 524fa9e4066Sahrens 525fa9e4066Sahrens ASSERT3U(db->db_object, ==, zap->zap_object); 526f65e61c0Sahrens ASSERT3U(db->db_offset, ==, blkid << bs); 527f65e61c0Sahrens ASSERT3U(db->db_size, ==, 1 << bs); 528fa9e4066Sahrens ASSERT(blkid != 0); 529fa9e4066Sahrens 530fa9e4066Sahrens l = dmu_buf_get_user(db); 531fa9e4066Sahrens 532fa9e4066Sahrens if (l == NULL) 533fa9e4066Sahrens l = zap_open_leaf(blkid, db); 534fa9e4066Sahrens 535fa9e4066Sahrens rw_enter(&l->l_rwlock, lt); 536fa9e4066Sahrens /* 537c1379625SJustin T. Gibbs * Must lock before dirtying, otherwise zap_leaf_phys(l) could change, 538fa9e4066Sahrens * causing ASSERT below to fail. 539fa9e4066Sahrens */ 540fa9e4066Sahrens if (lt == RW_WRITER) 541fa9e4066Sahrens dmu_buf_will_dirty(db, tx); 542fa9e4066Sahrens ASSERT3U(l->l_blkid, ==, blkid); 543fa9e4066Sahrens ASSERT3P(l->l_dbuf, ==, db); 544c1379625SJustin T. Gibbs ASSERT3U(zap_leaf_phys(l)->l_hdr.lh_block_type, ==, ZBT_LEAF); 545c1379625SJustin T. Gibbs ASSERT3U(zap_leaf_phys(l)->l_hdr.lh_magic, ==, ZAP_LEAF_MAGIC); 546fa9e4066Sahrens 547ea8dc4b6Seschrock *lp = l; 548ea8dc4b6Seschrock return (0); 549fa9e4066Sahrens } 550fa9e4066Sahrens 551ea8dc4b6Seschrock static int 552ea8dc4b6Seschrock zap_idx_to_blk(zap_t *zap, uint64_t idx, uint64_t *valp) 553fa9e4066Sahrens { 554fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 555fa9e4066Sahrens 556c1379625SJustin T. Gibbs if (zap_f_phys(zap)->zap_ptrtbl.zt_numblks == 0) { 557fa9e4066Sahrens ASSERT3U(idx, <, 558c1379625SJustin T. Gibbs (1ULL << zap_f_phys(zap)->zap_ptrtbl.zt_shift)); 559ea8dc4b6Seschrock *valp = ZAP_EMBEDDED_PTRTBL_ENT(zap, idx); 560ea8dc4b6Seschrock return (0); 561fa9e4066Sahrens } else { 562c1379625SJustin T. Gibbs return (zap_table_load(zap, &zap_f_phys(zap)->zap_ptrtbl, 563ea8dc4b6Seschrock idx, valp)); 564fa9e4066Sahrens } 565fa9e4066Sahrens } 566fa9e4066Sahrens 567ea8dc4b6Seschrock static int 568fa9e4066Sahrens zap_set_idx_to_blk(zap_t *zap, uint64_t idx, uint64_t blk, dmu_tx_t *tx) 569fa9e4066Sahrens { 570fa9e4066Sahrens ASSERT(tx != NULL); 571fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 572fa9e4066Sahrens 573c1379625SJustin T. Gibbs if (zap_f_phys(zap)->zap_ptrtbl.zt_blk == 0) { 574f65e61c0Sahrens ZAP_EMBEDDED_PTRTBL_ENT(zap, idx) = blk; 575ea8dc4b6Seschrock return (0); 576fa9e4066Sahrens } else { 577c1379625SJustin T. Gibbs return (zap_table_store(zap, &zap_f_phys(zap)->zap_ptrtbl, 578ea8dc4b6Seschrock idx, blk, tx)); 579fa9e4066Sahrens } 580fa9e4066Sahrens } 581fa9e4066Sahrens 582ea8dc4b6Seschrock static int 583ea8dc4b6Seschrock zap_deref_leaf(zap_t *zap, uint64_t h, dmu_tx_t *tx, krw_t lt, zap_leaf_t **lp) 584fa9e4066Sahrens { 585ea8dc4b6Seschrock uint64_t idx, blk; 586ea8dc4b6Seschrock int err; 587fa9e4066Sahrens 588fa9e4066Sahrens ASSERT(zap->zap_dbuf == NULL || 589c1379625SJustin T. Gibbs zap_f_phys(zap) == zap->zap_dbuf->db_data); 59002525cd0SChunwei Chen 59102525cd0SChunwei Chen /* Reality check for corrupt zap objects (leaf or header). */ 59202525cd0SChunwei Chen if ((zap_f_phys(zap)->zap_block_type != ZBT_LEAF && 59302525cd0SChunwei Chen zap_f_phys(zap)->zap_block_type != ZBT_HEADER) || 59402525cd0SChunwei Chen zap_f_phys(zap)->zap_magic != ZAP_MAGIC) { 59502525cd0SChunwei Chen return (SET_ERROR(EIO)); 59602525cd0SChunwei Chen } 59702525cd0SChunwei Chen 598c1379625SJustin T. Gibbs idx = ZAP_HASH_IDX(h, zap_f_phys(zap)->zap_ptrtbl.zt_shift); 599ea8dc4b6Seschrock err = zap_idx_to_blk(zap, idx, &blk); 600ea8dc4b6Seschrock if (err != 0) 601ea8dc4b6Seschrock return (err); 602ea8dc4b6Seschrock err = zap_get_leaf_byblk(zap, blk, tx, lt, lp); 603fa9e4066Sahrens 604c1379625SJustin T. Gibbs ASSERT(err || 605c1379625SJustin T. Gibbs ZAP_HASH_IDX(h, zap_leaf_phys(*lp)->l_hdr.lh_prefix_len) == 606c1379625SJustin T. Gibbs zap_leaf_phys(*lp)->l_hdr.lh_prefix); 607ea8dc4b6Seschrock return (err); 608fa9e4066Sahrens } 609fa9e4066Sahrens 610ea8dc4b6Seschrock static int 611ae972795SMatthew Ahrens zap_expand_leaf(zap_name_t *zn, zap_leaf_t *l, 612ae972795SMatthew Ahrens void *tag, dmu_tx_t *tx, zap_leaf_t **lp) 613fa9e4066Sahrens { 614ad860c82Sbonwick zap_t *zap = zn->zn_zap; 615ad860c82Sbonwick uint64_t hash = zn->zn_hash; 616fa9e4066Sahrens zap_leaf_t *nl; 617fa9e4066Sahrens int prefix_diff, i, err; 618fa9e4066Sahrens uint64_t sibling; 619c1379625SJustin T. Gibbs int old_prefix_len = zap_leaf_phys(l)->l_hdr.lh_prefix_len; 620fa9e4066Sahrens 621c1379625SJustin T. Gibbs ASSERT3U(old_prefix_len, <=, zap_f_phys(zap)->zap_ptrtbl.zt_shift); 622fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 623fa9e4066Sahrens 62466328dd3Sahrens ASSERT3U(ZAP_HASH_IDX(hash, old_prefix_len), ==, 625c1379625SJustin T. Gibbs zap_leaf_phys(l)->l_hdr.lh_prefix); 626fa9e4066Sahrens 62766328dd3Sahrens if (zap_tryupgradedir(zap, tx) == 0 || 628c1379625SJustin T. Gibbs old_prefix_len == zap_f_phys(zap)->zap_ptrtbl.zt_shift) { 62966328dd3Sahrens /* We failed to upgrade, or need to grow the pointer table */ 630fa9e4066Sahrens objset_t *os = zap->zap_objset; 631fa9e4066Sahrens uint64_t object = zap->zap_object; 632fa9e4066Sahrens 633fa9e4066Sahrens zap_put_leaf(l); 634ae972795SMatthew Ahrens zap_unlockdir(zap, tag); 635c5f9e431Sahrens err = zap_lockdir(os, object, tx, RW_WRITER, 636ae972795SMatthew Ahrens FALSE, FALSE, tag, &zn->zn_zap); 637ad860c82Sbonwick zap = zn->zn_zap; 63866328dd3Sahrens if (err) 63966328dd3Sahrens return (err); 640fa9e4066Sahrens ASSERT(!zap->zap_ismicro); 641fa9e4066Sahrens 64266328dd3Sahrens while (old_prefix_len == 643c1379625SJustin T. Gibbs zap_f_phys(zap)->zap_ptrtbl.zt_shift) { 64466328dd3Sahrens err = zap_grow_ptrtbl(zap, tx); 64566328dd3Sahrens if (err) 64666328dd3Sahrens return (err); 64766328dd3Sahrens } 64866328dd3Sahrens 64966328dd3Sahrens err = zap_deref_leaf(zap, hash, tx, RW_WRITER, &l); 65066328dd3Sahrens if (err) 65166328dd3Sahrens return (err); 65266328dd3Sahrens 653c1379625SJustin T. Gibbs if (zap_leaf_phys(l)->l_hdr.lh_prefix_len != old_prefix_len) { 654fa9e4066Sahrens /* it split while our locks were down */ 655ea8dc4b6Seschrock *lp = l; 656ea8dc4b6Seschrock return (0); 657ea8dc4b6Seschrock } 658fa9e4066Sahrens } 659fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 660c1379625SJustin T. Gibbs ASSERT3U(old_prefix_len, <, zap_f_phys(zap)->zap_ptrtbl.zt_shift); 66166328dd3Sahrens ASSERT3U(ZAP_HASH_IDX(hash, old_prefix_len), ==, 662c1379625SJustin T. Gibbs zap_leaf_phys(l)->l_hdr.lh_prefix); 663fa9e4066Sahrens 664c1379625SJustin T. Gibbs prefix_diff = zap_f_phys(zap)->zap_ptrtbl.zt_shift - 66566328dd3Sahrens (old_prefix_len + 1); 66666328dd3Sahrens sibling = (ZAP_HASH_IDX(hash, old_prefix_len + 1) | 1) << prefix_diff; 667ea8dc4b6Seschrock 668ea8dc4b6Seschrock /* check for i/o errors before doing zap_leaf_split */ 669fa9e4066Sahrens for (i = 0; i < (1ULL<<prefix_diff); i++) { 670ea8dc4b6Seschrock uint64_t blk; 671ea8dc4b6Seschrock err = zap_idx_to_blk(zap, sibling+i, &blk); 672ea8dc4b6Seschrock if (err) 673ea8dc4b6Seschrock return (err); 674ea8dc4b6Seschrock ASSERT3U(blk, ==, l->l_blkid); 675ea8dc4b6Seschrock } 676ea8dc4b6Seschrock 67766328dd3Sahrens nl = zap_create_leaf(zap, tx); 678de8267e0Stimh zap_leaf_split(l, nl, zap->zap_normflags != 0); 679ea8dc4b6Seschrock 68066328dd3Sahrens /* set sibling pointers */ 681fb09f5aaSMadhav Suresh for (i = 0; i < (1ULL << prefix_diff); i++) { 682ea8dc4b6Seschrock err = zap_set_idx_to_blk(zap, sibling+i, nl->l_blkid, tx); 683fb09f5aaSMadhav Suresh ASSERT0(err); /* we checked for i/o errors above */ 684fa9e4066Sahrens } 685fa9e4066Sahrens 686c1379625SJustin T. Gibbs if (hash & (1ULL << (64 - zap_leaf_phys(l)->l_hdr.lh_prefix_len))) { 687fa9e4066Sahrens /* we want the sibling */ 688fa9e4066Sahrens zap_put_leaf(l); 68966328dd3Sahrens *lp = nl; 690fa9e4066Sahrens } else { 691fa9e4066Sahrens zap_put_leaf(nl); 69266328dd3Sahrens *lp = l; 693fa9e4066Sahrens } 694fa9e4066Sahrens 695ea8dc4b6Seschrock return (0); 696fa9e4066Sahrens } 697fa9e4066Sahrens 698fa9e4066Sahrens static void 699ae972795SMatthew Ahrens zap_put_leaf_maybe_grow_ptrtbl(zap_name_t *zn, zap_leaf_t *l, 700ae972795SMatthew Ahrens void *tag, dmu_tx_t *tx) 701fa9e4066Sahrens { 702ad860c82Sbonwick zap_t *zap = zn->zn_zap; 703c1379625SJustin T. Gibbs int shift = zap_f_phys(zap)->zap_ptrtbl.zt_shift; 704c1379625SJustin T. Gibbs int leaffull = (zap_leaf_phys(l)->l_hdr.lh_prefix_len == shift && 705c1379625SJustin T. Gibbs zap_leaf_phys(l)->l_hdr.lh_nfree < ZAP_LEAF_LOW_WATER); 706fa9e4066Sahrens 70766328dd3Sahrens zap_put_leaf(l); 708fa9e4066Sahrens 709c1379625SJustin T. Gibbs if (leaffull || zap_f_phys(zap)->zap_ptrtbl.zt_nextblk) { 71066328dd3Sahrens int err; 711fa9e4066Sahrens 71266328dd3Sahrens /* 71366328dd3Sahrens * We are in the middle of growing the pointer table, or 71466328dd3Sahrens * this leaf will soon make us grow it. 71566328dd3Sahrens */ 716fa9e4066Sahrens if (zap_tryupgradedir(zap, tx) == 0) { 717fa9e4066Sahrens objset_t *os = zap->zap_objset; 718fa9e4066Sahrens uint64_t zapobj = zap->zap_object; 719fa9e4066Sahrens 720ae972795SMatthew Ahrens zap_unlockdir(zap, tag); 721fa9e4066Sahrens err = zap_lockdir(os, zapobj, tx, 722ae972795SMatthew Ahrens RW_WRITER, FALSE, FALSE, tag, &zn->zn_zap); 723ad860c82Sbonwick zap = zn->zn_zap; 72466328dd3Sahrens if (err) 72566328dd3Sahrens return; 726fa9e4066Sahrens } 727fa9e4066Sahrens 72866328dd3Sahrens /* could have finished growing while our locks were down */ 729c1379625SJustin T. Gibbs if (zap_f_phys(zap)->zap_ptrtbl.zt_shift == shift) 73066328dd3Sahrens (void) zap_grow_ptrtbl(zap, tx); 731fa9e4066Sahrens } 732fa9e4066Sahrens } 733fa9e4066Sahrens 734fa9e4066Sahrens static int 73592241e0bSTom Erickson fzap_checkname(zap_name_t *zn) 736fa9e4066Sahrens { 737486ae710SMatthew Ahrens if (zn->zn_key_orig_numints * zn->zn_key_intlen > ZAP_MAXNAMELEN) 738be6fd75aSMatthew Ahrens return (SET_ERROR(ENAMETOOLONG)); 73992241e0bSTom Erickson return (0); 74092241e0bSTom Erickson } 74166328dd3Sahrens 74292241e0bSTom Erickson static int 74392241e0bSTom Erickson fzap_checksize(uint64_t integer_size, uint64_t num_integers) 74492241e0bSTom Erickson { 745fa9e4066Sahrens /* Only integer sizes supported by C */ 746fa9e4066Sahrens switch (integer_size) { 747fa9e4066Sahrens case 1: 748fa9e4066Sahrens case 2: 749fa9e4066Sahrens case 4: 750fa9e4066Sahrens case 8: 751fa9e4066Sahrens break; 752fa9e4066Sahrens default: 753be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL)); 754fa9e4066Sahrens } 755fa9e4066Sahrens 75666328dd3Sahrens if (integer_size * num_integers > ZAP_MAXVALUELEN) 75766328dd3Sahrens return (E2BIG); 758fa9e4066Sahrens 759fa9e4066Sahrens return (0); 760fa9e4066Sahrens } 761fa9e4066Sahrens 76292241e0bSTom Erickson static int 76392241e0bSTom Erickson fzap_check(zap_name_t *zn, uint64_t integer_size, uint64_t num_integers) 76492241e0bSTom Erickson { 76592241e0bSTom Erickson int err; 76692241e0bSTom Erickson 76792241e0bSTom Erickson if ((err = fzap_checkname(zn)) != 0) 76892241e0bSTom Erickson return (err); 76992241e0bSTom Erickson return (fzap_checksize(integer_size, num_integers)); 77092241e0bSTom Erickson } 77192241e0bSTom Erickson 772fa9e4066Sahrens /* 773da6c28aaSamw * Routines for manipulating attributes. 774fa9e4066Sahrens */ 775fa9e4066Sahrens int 776da6c28aaSamw fzap_lookup(zap_name_t *zn, 777da6c28aaSamw uint64_t integer_size, uint64_t num_integers, void *buf, 778da6c28aaSamw char *realname, int rn_len, boolean_t *ncp) 779fa9e4066Sahrens { 780fa9e4066Sahrens zap_leaf_t *l; 781fa9e4066Sahrens int err; 782fa9e4066Sahrens zap_entry_handle_t zeh; 783fa9e4066Sahrens 78492241e0bSTom Erickson if ((err = fzap_checkname(zn)) != 0) 785fa9e4066Sahrens return (err); 786fa9e4066Sahrens 787da6c28aaSamw err = zap_deref_leaf(zn->zn_zap, zn->zn_hash, NULL, RW_READER, &l); 788ea8dc4b6Seschrock if (err != 0) 789ea8dc4b6Seschrock return (err); 790da6c28aaSamw err = zap_leaf_lookup(l, zn, &zeh); 791da6c28aaSamw if (err == 0) { 79292241e0bSTom Erickson if ((err = fzap_checksize(integer_size, num_integers)) != 0) { 79392241e0bSTom Erickson zap_put_leaf(l); 79492241e0bSTom Erickson return (err); 79592241e0bSTom Erickson } 79692241e0bSTom Erickson 79766328dd3Sahrens err = zap_entry_read(&zeh, integer_size, num_integers, buf); 798b24ab676SJeff Bonwick (void) zap_entry_read_name(zn->zn_zap, &zeh, rn_len, realname); 799da6c28aaSamw if (ncp) { 800da6c28aaSamw *ncp = zap_entry_normalization_conflict(&zeh, 801da6c28aaSamw zn, NULL, zn->zn_zap); 802da6c28aaSamw } 803da6c28aaSamw } 80466328dd3Sahrens 805fa9e4066Sahrens zap_put_leaf(l); 806fa9e4066Sahrens return (err); 807fa9e4066Sahrens } 808fa9e4066Sahrens 809fa9e4066Sahrens int 810da6c28aaSamw fzap_add_cd(zap_name_t *zn, 811fa9e4066Sahrens uint64_t integer_size, uint64_t num_integers, 812ae972795SMatthew Ahrens const void *val, uint32_t cd, void *tag, dmu_tx_t *tx) 813fa9e4066Sahrens { 814fa9e4066Sahrens zap_leaf_t *l; 815fa9e4066Sahrens int err; 816fa9e4066Sahrens zap_entry_handle_t zeh; 817da6c28aaSamw zap_t *zap = zn->zn_zap; 818fa9e4066Sahrens 819fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 820fa9e4066Sahrens ASSERT(!zap->zap_ismicro); 82192241e0bSTom Erickson ASSERT(fzap_check(zn, integer_size, num_integers) == 0); 822fa9e4066Sahrens 823da6c28aaSamw err = zap_deref_leaf(zap, zn->zn_hash, tx, RW_WRITER, &l); 824ea8dc4b6Seschrock if (err != 0) 825ea8dc4b6Seschrock return (err); 826fa9e4066Sahrens retry: 827da6c28aaSamw err = zap_leaf_lookup(l, zn, &zeh); 828fa9e4066Sahrens if (err == 0) { 829be6fd75aSMatthew Ahrens err = SET_ERROR(EEXIST); 830fa9e4066Sahrens goto out; 831fa9e4066Sahrens } 832ea8dc4b6Seschrock if (err != ENOENT) 833ea8dc4b6Seschrock goto out; 834fa9e4066Sahrens 835b24ab676SJeff Bonwick err = zap_entry_create(l, zn, cd, 836fa9e4066Sahrens integer_size, num_integers, val, &zeh); 837fa9e4066Sahrens 838fa9e4066Sahrens if (err == 0) { 839fa9e4066Sahrens zap_increment_num_entries(zap, 1, tx); 840fa9e4066Sahrens } else if (err == EAGAIN) { 841ae972795SMatthew Ahrens err = zap_expand_leaf(zn, l, tag, tx, &l); 842ad860c82Sbonwick zap = zn->zn_zap; /* zap_expand_leaf() may change zap */ 84366328dd3Sahrens if (err == 0) 84466328dd3Sahrens goto retry; 845fa9e4066Sahrens } 846fa9e4066Sahrens 847fa9e4066Sahrens out: 848ad860c82Sbonwick if (zap != NULL) 849ae972795SMatthew Ahrens zap_put_leaf_maybe_grow_ptrtbl(zn, l, tag, tx); 850fa9e4066Sahrens return (err); 851fa9e4066Sahrens } 852fa9e4066Sahrens 853fa9e4066Sahrens int 854da6c28aaSamw fzap_add(zap_name_t *zn, 855fa9e4066Sahrens uint64_t integer_size, uint64_t num_integers, 856ae972795SMatthew Ahrens const void *val, void *tag, dmu_tx_t *tx) 857fa9e4066Sahrens { 85892241e0bSTom Erickson int err = fzap_check(zn, integer_size, num_integers); 859fa9e4066Sahrens if (err != 0) 860fa9e4066Sahrens return (err); 861fa9e4066Sahrens 862da6c28aaSamw return (fzap_add_cd(zn, integer_size, num_integers, 863ae972795SMatthew Ahrens val, ZAP_NEED_CD, tag, tx)); 864fa9e4066Sahrens } 865fa9e4066Sahrens 866fa9e4066Sahrens int 867da6c28aaSamw fzap_update(zap_name_t *zn, 868ae972795SMatthew Ahrens int integer_size, uint64_t num_integers, const void *val, 869ae972795SMatthew Ahrens void *tag, dmu_tx_t *tx) 870fa9e4066Sahrens { 871fa9e4066Sahrens zap_leaf_t *l; 872fa9e4066Sahrens int err, create; 873fa9e4066Sahrens zap_entry_handle_t zeh; 874da6c28aaSamw zap_t *zap = zn->zn_zap; 875fa9e4066Sahrens 876fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 87792241e0bSTom Erickson err = fzap_check(zn, integer_size, num_integers); 878fa9e4066Sahrens if (err != 0) 879fa9e4066Sahrens return (err); 880fa9e4066Sahrens 881da6c28aaSamw err = zap_deref_leaf(zap, zn->zn_hash, tx, RW_WRITER, &l); 882ea8dc4b6Seschrock if (err != 0) 883ea8dc4b6Seschrock return (err); 884fa9e4066Sahrens retry: 885da6c28aaSamw err = zap_leaf_lookup(l, zn, &zeh); 886fa9e4066Sahrens create = (err == ENOENT); 887fa9e4066Sahrens ASSERT(err == 0 || err == ENOENT); 888fa9e4066Sahrens 889fa9e4066Sahrens if (create) { 890b24ab676SJeff Bonwick err = zap_entry_create(l, zn, ZAP_NEED_CD, 891b24ab676SJeff Bonwick integer_size, num_integers, val, &zeh); 892fa9e4066Sahrens if (err == 0) 893fa9e4066Sahrens zap_increment_num_entries(zap, 1, tx); 894fa9e4066Sahrens } else { 895fa9e4066Sahrens err = zap_entry_update(&zeh, integer_size, num_integers, val); 896fa9e4066Sahrens } 897fa9e4066Sahrens 898fa9e4066Sahrens if (err == EAGAIN) { 899ae972795SMatthew Ahrens err = zap_expand_leaf(zn, l, tag, tx, &l); 900ad860c82Sbonwick zap = zn->zn_zap; /* zap_expand_leaf() may change zap */ 90166328dd3Sahrens if (err == 0) 90266328dd3Sahrens goto retry; 903fa9e4066Sahrens } 904fa9e4066Sahrens 905ad860c82Sbonwick if (zap != NULL) 906ae972795SMatthew Ahrens zap_put_leaf_maybe_grow_ptrtbl(zn, l, tag, tx); 907fa9e4066Sahrens return (err); 908fa9e4066Sahrens } 909fa9e4066Sahrens 910fa9e4066Sahrens int 911da6c28aaSamw fzap_length(zap_name_t *zn, 912fa9e4066Sahrens uint64_t *integer_size, uint64_t *num_integers) 913fa9e4066Sahrens { 914fa9e4066Sahrens zap_leaf_t *l; 915fa9e4066Sahrens int err; 916fa9e4066Sahrens zap_entry_handle_t zeh; 917fa9e4066Sahrens 918da6c28aaSamw err = zap_deref_leaf(zn->zn_zap, zn->zn_hash, NULL, RW_READER, &l); 919ea8dc4b6Seschrock if (err != 0) 920ea8dc4b6Seschrock return (err); 921da6c28aaSamw err = zap_leaf_lookup(l, zn, &zeh); 922fa9e4066Sahrens if (err != 0) 923fa9e4066Sahrens goto out; 924fa9e4066Sahrens 925fa9e4066Sahrens if (integer_size) 926fa9e4066Sahrens *integer_size = zeh.zeh_integer_size; 927fa9e4066Sahrens if (num_integers) 928fa9e4066Sahrens *num_integers = zeh.zeh_num_integers; 929fa9e4066Sahrens out: 930fa9e4066Sahrens zap_put_leaf(l); 931fa9e4066Sahrens return (err); 932fa9e4066Sahrens } 933fa9e4066Sahrens 934fa9e4066Sahrens int 935da6c28aaSamw fzap_remove(zap_name_t *zn, dmu_tx_t *tx) 936fa9e4066Sahrens { 937fa9e4066Sahrens zap_leaf_t *l; 938fa9e4066Sahrens int err; 939fa9e4066Sahrens zap_entry_handle_t zeh; 940fa9e4066Sahrens 941da6c28aaSamw err = zap_deref_leaf(zn->zn_zap, zn->zn_hash, tx, RW_WRITER, &l); 942ea8dc4b6Seschrock if (err != 0) 943ea8dc4b6Seschrock return (err); 944da6c28aaSamw err = zap_leaf_lookup(l, zn, &zeh); 945fa9e4066Sahrens if (err == 0) { 946fa9e4066Sahrens zap_entry_remove(&zeh); 947da6c28aaSamw zap_increment_num_entries(zn->zn_zap, -1, tx); 948fa9e4066Sahrens } 949fa9e4066Sahrens zap_put_leaf(l); 950fa9e4066Sahrens return (err); 951fa9e4066Sahrens } 952fa9e4066Sahrens 953c7cd2421SGeorge Wilson void 954c7cd2421SGeorge Wilson fzap_prefetch(zap_name_t *zn) 955c7cd2421SGeorge Wilson { 956c7cd2421SGeorge Wilson uint64_t idx, blk; 957c7cd2421SGeorge Wilson zap_t *zap = zn->zn_zap; 958c7cd2421SGeorge Wilson int bs; 959c7cd2421SGeorge Wilson 960c7cd2421SGeorge Wilson idx = ZAP_HASH_IDX(zn->zn_hash, 961c1379625SJustin T. Gibbs zap_f_phys(zap)->zap_ptrtbl.zt_shift); 962c7cd2421SGeorge Wilson if (zap_idx_to_blk(zap, idx, &blk) != 0) 963c7cd2421SGeorge Wilson return; 964c7cd2421SGeorge Wilson bs = FZAP_BLOCK_SHIFT(zap); 965a2cdcdd2SPaul Dagnelie dmu_prefetch(zap->zap_objset, zap->zap_object, 0, blk << bs, 1 << bs, 966a2cdcdd2SPaul Dagnelie ZIO_PRIORITY_SYNC_READ); 967c7cd2421SGeorge Wilson } 968c7cd2421SGeorge Wilson 969088f3894Sahrens /* 970088f3894Sahrens * Helper functions for consumers. 971088f3894Sahrens */ 972088f3894Sahrens 973ad135b5dSChristopher Siden uint64_t 974ad135b5dSChristopher Siden zap_create_link(objset_t *os, dmu_object_type_t ot, uint64_t parent_obj, 975ad135b5dSChristopher Siden const char *name, dmu_tx_t *tx) 976ad135b5dSChristopher Siden { 977ad135b5dSChristopher Siden uint64_t new_obj; 978ad135b5dSChristopher Siden 979ad135b5dSChristopher Siden VERIFY((new_obj = zap_create(os, ot, DMU_OT_NONE, 0, tx)) > 0); 980215198a6SJoe Stein VERIFY0(zap_add(os, parent_obj, name, sizeof (uint64_t), 1, &new_obj, 981215198a6SJoe Stein tx)); 982ad135b5dSChristopher Siden 983ad135b5dSChristopher Siden return (new_obj); 984ad135b5dSChristopher Siden } 985ad135b5dSChristopher Siden 986fa9e4066Sahrens int 987e7437265Sahrens zap_value_search(objset_t *os, uint64_t zapobj, uint64_t value, uint64_t mask, 988e7437265Sahrens char *name) 989fa9e4066Sahrens { 990fa9e4066Sahrens zap_cursor_t zc; 991fa9e4066Sahrens zap_attribute_t *za; 992fa9e4066Sahrens int err; 993fa9e4066Sahrens 994e7437265Sahrens if (mask == 0) 995e7437265Sahrens mask = -1ULL; 996e7437265Sahrens 997fa9e4066Sahrens za = kmem_alloc(sizeof (zap_attribute_t), KM_SLEEP); 998fa9e4066Sahrens for (zap_cursor_init(&zc, os, zapobj); 999fa9e4066Sahrens (err = zap_cursor_retrieve(&zc, za)) == 0; 1000fa9e4066Sahrens zap_cursor_advance(&zc)) { 1001e7437265Sahrens if ((za->za_first_integer & mask) == (value & mask)) { 1002fa9e4066Sahrens (void) strcpy(name, za->za_name); 1003fa9e4066Sahrens break; 1004fa9e4066Sahrens } 1005fa9e4066Sahrens } 100687e5029aSahrens zap_cursor_fini(&zc); 1007fa9e4066Sahrens kmem_free(za, sizeof (zap_attribute_t)); 1008fa9e4066Sahrens return (err); 1009fa9e4066Sahrens } 1010fa9e4066Sahrens 1011088f3894Sahrens int 1012088f3894Sahrens zap_join(objset_t *os, uint64_t fromobj, uint64_t intoobj, dmu_tx_t *tx) 1013088f3894Sahrens { 1014088f3894Sahrens zap_cursor_t zc; 1015088f3894Sahrens zap_attribute_t za; 1016088f3894Sahrens int err; 1017088f3894Sahrens 1018b287be1bSWill Andrews err = 0; 1019088f3894Sahrens for (zap_cursor_init(&zc, os, fromobj); 1020088f3894Sahrens zap_cursor_retrieve(&zc, &za) == 0; 1021088f3894Sahrens (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 } 1026088f3894Sahrens err = zap_add(os, intoobj, za.za_name, 1027088f3894Sahrens 8, 1, &za.za_first_integer, tx); 1028088f3894Sahrens if (err) 1029b287be1bSWill Andrews break; 1030088f3894Sahrens } 1031088f3894Sahrens zap_cursor_fini(&zc); 1032b287be1bSWill Andrews return (err); 1033088f3894Sahrens } 1034088f3894Sahrens 10353f9d6ad7SLin Ling int 10363f9d6ad7SLin Ling zap_join_key(objset_t *os, uint64_t fromobj, uint64_t intoobj, 10373f9d6ad7SLin Ling uint64_t value, 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)) { 1047b287be1bSWill Andrews if (za.za_integer_length != 8 || za.za_num_integers != 1) { 1048b287be1bSWill Andrews err = SET_ERROR(EINVAL); 1049b287be1bSWill Andrews break; 1050b287be1bSWill Andrews } 10513f9d6ad7SLin Ling err = zap_add(os, intoobj, za.za_name, 10523f9d6ad7SLin Ling 8, 1, &value, tx); 10533f9d6ad7SLin Ling if (err) 1054b287be1bSWill Andrews break; 10553f9d6ad7SLin Ling } 10563f9d6ad7SLin Ling zap_cursor_fini(&zc); 1057b287be1bSWill Andrews return (err); 10583f9d6ad7SLin Ling } 10593f9d6ad7SLin Ling 10603f9d6ad7SLin Ling int 10613f9d6ad7SLin Ling zap_join_increment(objset_t *os, uint64_t fromobj, uint64_t intoobj, 10623f9d6ad7SLin Ling dmu_tx_t *tx) 10633f9d6ad7SLin Ling { 10643f9d6ad7SLin Ling zap_cursor_t zc; 10653f9d6ad7SLin Ling zap_attribute_t za; 10663f9d6ad7SLin Ling int err; 10673f9d6ad7SLin Ling 1068b287be1bSWill Andrews err = 0; 10693f9d6ad7SLin Ling for (zap_cursor_init(&zc, os, fromobj); 10703f9d6ad7SLin Ling zap_cursor_retrieve(&zc, &za) == 0; 10713f9d6ad7SLin Ling (void) zap_cursor_advance(&zc)) { 10723f9d6ad7SLin Ling uint64_t delta = 0; 10733f9d6ad7SLin Ling 1074b287be1bSWill Andrews if (za.za_integer_length != 8 || za.za_num_integers != 1) { 1075b287be1bSWill Andrews err = SET_ERROR(EINVAL); 1076b287be1bSWill Andrews break; 1077b287be1bSWill Andrews } 10783f9d6ad7SLin Ling 10793f9d6ad7SLin Ling err = zap_lookup(os, intoobj, za.za_name, 8, 1, &delta); 10803f9d6ad7SLin Ling if (err != 0 && err != ENOENT) 1081b287be1bSWill Andrews break; 10823f9d6ad7SLin Ling delta += za.za_first_integer; 10833f9d6ad7SLin Ling err = zap_update(os, intoobj, za.za_name, 8, 1, &delta, tx); 10843f9d6ad7SLin Ling if (err) 1085b287be1bSWill Andrews break; 10863f9d6ad7SLin Ling } 10873f9d6ad7SLin Ling zap_cursor_fini(&zc); 1088b287be1bSWill Andrews return (err); 10893f9d6ad7SLin Ling } 10903f9d6ad7SLin Ling 1091088f3894Sahrens int 1092088f3894Sahrens zap_add_int(objset_t *os, uint64_t obj, uint64_t value, dmu_tx_t *tx) 1093088f3894Sahrens { 1094088f3894Sahrens char name[20]; 1095088f3894Sahrens 1096088f3894Sahrens (void) snprintf(name, sizeof (name), "%llx", (longlong_t)value); 1097088f3894Sahrens return (zap_add(os, obj, name, 8, 1, &value, tx)); 1098088f3894Sahrens } 1099088f3894Sahrens 1100088f3894Sahrens int 1101088f3894Sahrens zap_remove_int(objset_t *os, uint64_t obj, uint64_t value, dmu_tx_t *tx) 1102088f3894Sahrens { 1103088f3894Sahrens char name[20]; 1104088f3894Sahrens 1105088f3894Sahrens (void) snprintf(name, sizeof (name), "%llx", (longlong_t)value); 1106088f3894Sahrens return (zap_remove(os, obj, name, tx)); 1107088f3894Sahrens } 1108088f3894Sahrens 1109088f3894Sahrens int 1110088f3894Sahrens zap_lookup_int(objset_t *os, uint64_t obj, uint64_t value) 1111088f3894Sahrens { 1112088f3894Sahrens char name[20]; 1113088f3894Sahrens 1114088f3894Sahrens (void) snprintf(name, sizeof (name), "%llx", (longlong_t)value); 1115088f3894Sahrens return (zap_lookup(os, obj, name, 8, 1, &value)); 1116088f3894Sahrens } 1117fa9e4066Sahrens 11189966ca11SMatthew Ahrens int 11193f9d6ad7SLin Ling zap_add_int_key(objset_t *os, uint64_t obj, 11203f9d6ad7SLin Ling uint64_t key, uint64_t value, dmu_tx_t *tx) 11213f9d6ad7SLin Ling { 11223f9d6ad7SLin Ling char name[20]; 11233f9d6ad7SLin Ling 11243f9d6ad7SLin Ling (void) snprintf(name, sizeof (name), "%llx", (longlong_t)key); 11253f9d6ad7SLin Ling return (zap_add(os, obj, name, 8, 1, &value, tx)); 11263f9d6ad7SLin Ling } 11273f9d6ad7SLin Ling 1128f1745736SMatthew Ahrens int 1129f1745736SMatthew Ahrens zap_update_int_key(objset_t *os, uint64_t obj, 1130f1745736SMatthew Ahrens uint64_t key, uint64_t value, dmu_tx_t *tx) 1131f1745736SMatthew Ahrens { 1132f1745736SMatthew Ahrens char name[20]; 1133f1745736SMatthew Ahrens 1134f1745736SMatthew Ahrens (void) snprintf(name, sizeof (name), "%llx", (longlong_t)key); 1135f1745736SMatthew Ahrens return (zap_update(os, obj, name, 8, 1, &value, tx)); 1136f1745736SMatthew Ahrens } 1137f1745736SMatthew Ahrens 11383f9d6ad7SLin Ling int 11393f9d6ad7SLin Ling zap_lookup_int_key(objset_t *os, uint64_t obj, uint64_t key, uint64_t *valuep) 11409966ca11SMatthew Ahrens { 11419966ca11SMatthew Ahrens char name[20]; 11423f9d6ad7SLin Ling 11433f9d6ad7SLin Ling (void) snprintf(name, sizeof (name), "%llx", (longlong_t)key); 11443f9d6ad7SLin Ling return (zap_lookup(os, obj, name, 8, 1, valuep)); 11453f9d6ad7SLin Ling } 11463f9d6ad7SLin Ling 11473f9d6ad7SLin Ling int 11483f9d6ad7SLin Ling zap_increment(objset_t *os, uint64_t obj, const char *name, int64_t delta, 11493f9d6ad7SLin Ling dmu_tx_t *tx) 11503f9d6ad7SLin Ling { 11519966ca11SMatthew Ahrens uint64_t value = 0; 11529966ca11SMatthew Ahrens int err; 11539966ca11SMatthew Ahrens 11549966ca11SMatthew Ahrens if (delta == 0) 11559966ca11SMatthew Ahrens return (0); 11569966ca11SMatthew Ahrens 11579966ca11SMatthew Ahrens err = zap_lookup(os, obj, name, 8, 1, &value); 11589966ca11SMatthew Ahrens if (err != 0 && err != ENOENT) 11599966ca11SMatthew Ahrens return (err); 11609966ca11SMatthew Ahrens value += delta; 11619966ca11SMatthew Ahrens if (value == 0) 11629966ca11SMatthew Ahrens err = zap_remove(os, obj, name, tx); 11639966ca11SMatthew Ahrens else 11649966ca11SMatthew Ahrens err = zap_update(os, obj, name, 8, 1, &value, tx); 11659966ca11SMatthew Ahrens return (err); 11669966ca11SMatthew Ahrens } 11679966ca11SMatthew Ahrens 11683f9d6ad7SLin Ling int 11693f9d6ad7SLin Ling zap_increment_int(objset_t *os, uint64_t obj, uint64_t key, int64_t delta, 11703f9d6ad7SLin Ling dmu_tx_t *tx) 11713f9d6ad7SLin Ling { 11723f9d6ad7SLin Ling char name[20]; 11733f9d6ad7SLin Ling 11743f9d6ad7SLin Ling (void) snprintf(name, sizeof (name), "%llx", (longlong_t)key); 11753f9d6ad7SLin Ling return (zap_increment(os, obj, name, delta, tx)); 11763f9d6ad7SLin Ling } 11779966ca11SMatthew Ahrens 1178fa9e4066Sahrens /* 1179fa9e4066Sahrens * Routines for iterating over the attributes. 1180fa9e4066Sahrens */ 1181fa9e4066Sahrens 1182fa9e4066Sahrens int 1183fa9e4066Sahrens fzap_cursor_retrieve(zap_t *zap, zap_cursor_t *zc, zap_attribute_t *za) 1184fa9e4066Sahrens { 1185fa9e4066Sahrens int err = ENOENT; 1186fa9e4066Sahrens zap_entry_handle_t zeh; 1187fa9e4066Sahrens zap_leaf_t *l; 1188fa9e4066Sahrens 1189fa9e4066Sahrens /* retrieve the next entry at or after zc_hash/zc_cd */ 1190fa9e4066Sahrens /* if no entry, return ENOENT */ 1191fa9e4066Sahrens 119287e5029aSahrens if (zc->zc_leaf && 119366328dd3Sahrens (ZAP_HASH_IDX(zc->zc_hash, 1194c1379625SJustin T. Gibbs zap_leaf_phys(zc->zc_leaf)->l_hdr.lh_prefix_len) != 1195c1379625SJustin T. Gibbs zap_leaf_phys(zc->zc_leaf)->l_hdr.lh_prefix)) { 119687e5029aSahrens rw_enter(&zc->zc_leaf->l_rwlock, RW_READER); 119787e5029aSahrens zap_put_leaf(zc->zc_leaf); 119887e5029aSahrens zc->zc_leaf = NULL; 119987e5029aSahrens } 120087e5029aSahrens 1201fa9e4066Sahrens again: 120287e5029aSahrens if (zc->zc_leaf == NULL) { 1203ea8dc4b6Seschrock err = zap_deref_leaf(zap, zc->zc_hash, NULL, RW_READER, 1204ea8dc4b6Seschrock &zc->zc_leaf); 1205ea8dc4b6Seschrock if (err != 0) 1206ea8dc4b6Seschrock return (err); 120787e5029aSahrens } else { 120887e5029aSahrens rw_enter(&zc->zc_leaf->l_rwlock, RW_READER); 120987e5029aSahrens } 121087e5029aSahrens l = zc->zc_leaf; 121187e5029aSahrens 1212fa9e4066Sahrens err = zap_leaf_lookup_closest(l, zc->zc_hash, zc->zc_cd, &zeh); 1213fa9e4066Sahrens 1214fa9e4066Sahrens if (err == ENOENT) { 121566328dd3Sahrens uint64_t nocare = 1216c1379625SJustin T. Gibbs (1ULL << (64 - zap_leaf_phys(l)->l_hdr.lh_prefix_len)) - 1; 1217fa9e4066Sahrens zc->zc_hash = (zc->zc_hash & ~nocare) + nocare + 1; 1218fa9e4066Sahrens zc->zc_cd = 0; 1219c1379625SJustin T. Gibbs if (zap_leaf_phys(l)->l_hdr.lh_prefix_len == 0 || 1220c1379625SJustin T. Gibbs zc->zc_hash == 0) { 1221fa9e4066Sahrens zc->zc_hash = -1ULL; 1222fa9e4066Sahrens } else { 122387e5029aSahrens zap_put_leaf(zc->zc_leaf); 122487e5029aSahrens zc->zc_leaf = NULL; 1225fa9e4066Sahrens goto again; 1226fa9e4066Sahrens } 1227fa9e4066Sahrens } 1228fa9e4066Sahrens 1229fa9e4066Sahrens if (err == 0) { 1230fa9e4066Sahrens zc->zc_hash = zeh.zeh_hash; 1231fa9e4066Sahrens zc->zc_cd = zeh.zeh_cd; 1232fa9e4066Sahrens za->za_integer_length = zeh.zeh_integer_size; 1233fa9e4066Sahrens za->za_num_integers = zeh.zeh_num_integers; 1234fa9e4066Sahrens if (zeh.zeh_num_integers == 0) { 1235fa9e4066Sahrens za->za_first_integer = 0; 1236fa9e4066Sahrens } else { 1237fa9e4066Sahrens err = zap_entry_read(&zeh, 8, 1, &za->za_first_integer); 1238fa9e4066Sahrens ASSERT(err == 0 || err == EOVERFLOW); 1239fa9e4066Sahrens } 1240b24ab676SJeff Bonwick err = zap_entry_read_name(zap, &zeh, 1241fa9e4066Sahrens sizeof (za->za_name), za->za_name); 1242fa9e4066Sahrens ASSERT(err == 0); 1243da6c28aaSamw 1244da6c28aaSamw za->za_normalization_conflict = 1245da6c28aaSamw zap_entry_normalization_conflict(&zeh, 1246da6c28aaSamw NULL, za->za_name, zap); 1247fa9e4066Sahrens } 124887e5029aSahrens rw_exit(&zc->zc_leaf->l_rwlock); 1249fa9e4066Sahrens return (err); 1250fa9e4066Sahrens } 1251fa9e4066Sahrens 1252fa9e4066Sahrens static void 1253fa9e4066Sahrens zap_stats_ptrtbl(zap_t *zap, uint64_t *tbl, int len, zap_stats_t *zs) 1254fa9e4066Sahrens { 1255ea8dc4b6Seschrock int i, err; 1256fa9e4066Sahrens uint64_t lastblk = 0; 1257fa9e4066Sahrens 1258fa9e4066Sahrens /* 1259fa9e4066Sahrens * NB: if a leaf has more pointers than an entire ptrtbl block 1260fa9e4066Sahrens * can hold, then it'll be accounted for more than once, since 1261fa9e4066Sahrens * we won't have lastblk. 1262fa9e4066Sahrens */ 1263fa9e4066Sahrens for (i = 0; i < len; i++) { 1264fa9e4066Sahrens zap_leaf_t *l; 1265fa9e4066Sahrens 1266fa9e4066Sahrens if (tbl[i] == lastblk) 1267fa9e4066Sahrens continue; 1268fa9e4066Sahrens lastblk = tbl[i]; 1269fa9e4066Sahrens 1270ea8dc4b6Seschrock err = zap_get_leaf_byblk(zap, tbl[i], NULL, RW_READER, &l); 1271ea8dc4b6Seschrock if (err == 0) { 127266328dd3Sahrens zap_leaf_stats(zap, l, zs); 1273ea8dc4b6Seschrock zap_put_leaf(l); 1274ea8dc4b6Seschrock } 1275fa9e4066Sahrens } 1276fa9e4066Sahrens } 1277fa9e4066Sahrens 1278fa9e4066Sahrens void 1279fa9e4066Sahrens fzap_get_stats(zap_t *zap, zap_stats_t *zs) 1280fa9e4066Sahrens { 1281f65e61c0Sahrens int bs = FZAP_BLOCK_SHIFT(zap); 1282f65e61c0Sahrens zs->zs_blocksize = 1ULL << bs; 12838248818dSnd 12848248818dSnd /* 12858248818dSnd * Set zap_phys_t fields 12868248818dSnd */ 1287c1379625SJustin T. Gibbs zs->zs_num_leafs = zap_f_phys(zap)->zap_num_leafs; 1288c1379625SJustin T. Gibbs zs->zs_num_entries = zap_f_phys(zap)->zap_num_entries; 1289c1379625SJustin T. Gibbs zs->zs_num_blocks = zap_f_phys(zap)->zap_freeblk; 1290c1379625SJustin T. Gibbs zs->zs_block_type = zap_f_phys(zap)->zap_block_type; 1291c1379625SJustin T. Gibbs zs->zs_magic = zap_f_phys(zap)->zap_magic; 1292c1379625SJustin T. Gibbs zs->zs_salt = zap_f_phys(zap)->zap_salt; 12938248818dSnd 12948248818dSnd /* 12958248818dSnd * Set zap_ptrtbl fields 12968248818dSnd */ 1297c1379625SJustin T. Gibbs zs->zs_ptrtbl_len = 1ULL << zap_f_phys(zap)->zap_ptrtbl.zt_shift; 1298c1379625SJustin T. Gibbs zs->zs_ptrtbl_nextblk = zap_f_phys(zap)->zap_ptrtbl.zt_nextblk; 12998248818dSnd zs->zs_ptrtbl_blks_copied = 1300c1379625SJustin T. Gibbs zap_f_phys(zap)->zap_ptrtbl.zt_blks_copied; 1301c1379625SJustin T. Gibbs zs->zs_ptrtbl_zt_blk = zap_f_phys(zap)->zap_ptrtbl.zt_blk; 1302c1379625SJustin T. Gibbs zs->zs_ptrtbl_zt_numblks = zap_f_phys(zap)->zap_ptrtbl.zt_numblks; 1303c1379625SJustin T. Gibbs zs->zs_ptrtbl_zt_shift = zap_f_phys(zap)->zap_ptrtbl.zt_shift; 1304fa9e4066Sahrens 1305c1379625SJustin T. Gibbs if (zap_f_phys(zap)->zap_ptrtbl.zt_numblks == 0) { 1306fa9e4066Sahrens /* the ptrtbl is entirely in the header block. */ 1307f65e61c0Sahrens zap_stats_ptrtbl(zap, &ZAP_EMBEDDED_PTRTBL_ENT(zap, 0), 1308f65e61c0Sahrens 1 << ZAP_EMBEDDED_PTRTBL_SHIFT(zap), zs); 1309fa9e4066Sahrens } else { 1310fa9e4066Sahrens int b; 1311fa9e4066Sahrens 1312a2cdcdd2SPaul Dagnelie dmu_prefetch(zap->zap_objset, zap->zap_object, 0, 1313c1379625SJustin T. Gibbs zap_f_phys(zap)->zap_ptrtbl.zt_blk << bs, 1314a2cdcdd2SPaul Dagnelie zap_f_phys(zap)->zap_ptrtbl.zt_numblks << bs, 1315a2cdcdd2SPaul Dagnelie ZIO_PRIORITY_SYNC_READ); 1316fa9e4066Sahrens 1317c1379625SJustin T. Gibbs for (b = 0; b < zap_f_phys(zap)->zap_ptrtbl.zt_numblks; 1318fa9e4066Sahrens b++) { 1319fa9e4066Sahrens dmu_buf_t *db; 1320ea8dc4b6Seschrock int err; 1321ea8dc4b6Seschrock 1322ea8dc4b6Seschrock err = dmu_buf_hold(zap->zap_objset, zap->zap_object, 1323c1379625SJustin T. Gibbs (zap_f_phys(zap)->zap_ptrtbl.zt_blk + b) << bs, 132447cb52daSJeff Bonwick FTAG, &db, DMU_READ_NO_PREFETCH); 1325ea8dc4b6Seschrock if (err == 0) { 1326ea8dc4b6Seschrock zap_stats_ptrtbl(zap, db->db_data, 1327ea8dc4b6Seschrock 1<<(bs-3), zs); 1328ea8dc4b6Seschrock dmu_buf_rele(db, FTAG); 1329ea8dc4b6Seschrock } 1330fa9e4066Sahrens } 1331fa9e4066Sahrens } 1332fa9e4066Sahrens } 13333d692628SSanjeev Bagewadi 13343d692628SSanjeev Bagewadi int 13350c779ad4SMatthew Ahrens fzap_count_write(zap_name_t *zn, int add, refcount_t *towrite, 13360c779ad4SMatthew Ahrens refcount_t *tooverwrite) 13373d692628SSanjeev Bagewadi { 13383d692628SSanjeev Bagewadi zap_t *zap = zn->zn_zap; 13393d692628SSanjeev Bagewadi zap_leaf_t *l; 13403d692628SSanjeev Bagewadi int err; 13413d692628SSanjeev Bagewadi 13423d692628SSanjeev Bagewadi /* 13433d692628SSanjeev Bagewadi * Account for the header block of the fatzap. 13443d692628SSanjeev Bagewadi */ 13453d692628SSanjeev Bagewadi if (!add && dmu_buf_freeable(zap->zap_dbuf)) { 13460c779ad4SMatthew Ahrens (void) refcount_add_many(tooverwrite, 13470c779ad4SMatthew Ahrens zap->zap_dbuf->db_size, FTAG); 13483d692628SSanjeev Bagewadi } else { 13490c779ad4SMatthew Ahrens (void) refcount_add_many(towrite, 13500c779ad4SMatthew Ahrens zap->zap_dbuf->db_size, FTAG); 13513d692628SSanjeev Bagewadi } 13523d692628SSanjeev Bagewadi 13533d692628SSanjeev Bagewadi /* 13543d692628SSanjeev Bagewadi * Account for the pointer table blocks. 13553d692628SSanjeev Bagewadi * If we are adding we need to account for the following cases : 13563d692628SSanjeev Bagewadi * - If the pointer table is embedded, this operation could force an 13573d692628SSanjeev Bagewadi * external pointer table. 13583d692628SSanjeev Bagewadi * - If this already has an external pointer table this operation 13593d692628SSanjeev Bagewadi * could extend the table. 13603d692628SSanjeev Bagewadi */ 13613d692628SSanjeev Bagewadi if (add) { 13620c779ad4SMatthew Ahrens if (zap_f_phys(zap)->zap_ptrtbl.zt_blk == 0) { 13630c779ad4SMatthew Ahrens (void) refcount_add_many(towrite, 13640c779ad4SMatthew Ahrens zap->zap_dbuf->db_size, FTAG); 13650c779ad4SMatthew Ahrens } else { 13660c779ad4SMatthew Ahrens (void) refcount_add_many(towrite, 13670c779ad4SMatthew Ahrens zap->zap_dbuf->db_size * 3, FTAG); 13680c779ad4SMatthew Ahrens } 13693d692628SSanjeev Bagewadi } 13703d692628SSanjeev Bagewadi 13713d692628SSanjeev Bagewadi /* 13723d692628SSanjeev Bagewadi * Now, check if the block containing leaf is freeable 13733d692628SSanjeev Bagewadi * and account accordingly. 13743d692628SSanjeev Bagewadi */ 13753d692628SSanjeev Bagewadi err = zap_deref_leaf(zap, zn->zn_hash, NULL, RW_READER, &l); 13763d692628SSanjeev Bagewadi if (err != 0) { 13773d692628SSanjeev Bagewadi return (err); 13783d692628SSanjeev Bagewadi } 13793d692628SSanjeev Bagewadi 13803d692628SSanjeev Bagewadi if (!add && dmu_buf_freeable(l->l_dbuf)) { 13810c779ad4SMatthew Ahrens (void) refcount_add_many(tooverwrite, l->l_dbuf->db_size, FTAG); 13823d692628SSanjeev Bagewadi } else { 13833d692628SSanjeev Bagewadi /* 13843d692628SSanjeev Bagewadi * If this an add operation, the leaf block could split. 13853d692628SSanjeev Bagewadi * Hence, we need to account for an additional leaf block. 13863d692628SSanjeev Bagewadi */ 13870c779ad4SMatthew Ahrens (void) refcount_add_many(towrite, 13880c779ad4SMatthew Ahrens (add ? 2 : 1) * l->l_dbuf->db_size, FTAG); 13893d692628SSanjeev Bagewadi } 13903d692628SSanjeev Bagewadi 13913d692628SSanjeev Bagewadi zap_put_leaf(l); 13923d692628SSanjeev Bagewadi return (0); 13933d692628SSanjeev Bagewadi } 1394