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 84*40510e8eSJosef 'Jeff' Sipek zap->zap_dbu.dbu_evict_func_sync = zap_evict_sync; 85*40510e8eSJosef 'Jeff' Sipek zap->zap_dbu.dbu_evict_func_async = NULL; 86fa9e4066Sahrens 87fa9e4066Sahrens mutex_init(&zap->zap_f.zap_num_entries_mtx, 0, 0, 0); 88bf16b11eSMatthew Ahrens zap->zap_f.zap_block_shift = highbit64(zap->zap_dbuf->db_size) - 1; 89fa9e4066Sahrens 90c1379625SJustin T. Gibbs zp = zap_f_phys(zap); 91fa9e4066Sahrens /* 92fa9e4066Sahrens * explicitly zero it since it might be coming from an 93fa9e4066Sahrens * initialized microzap 94fa9e4066Sahrens */ 95f65e61c0Sahrens bzero(zap->zap_dbuf->db_data, zap->zap_dbuf->db_size); 96fa9e4066Sahrens zp->zap_block_type = ZBT_HEADER; 97fa9e4066Sahrens zp->zap_magic = ZAP_MAGIC; 98fa9e4066Sahrens 99f65e61c0Sahrens zp->zap_ptrtbl.zt_shift = ZAP_EMBEDDED_PTRTBL_SHIFT(zap); 100fa9e4066Sahrens 101fa9e4066Sahrens zp->zap_freeblk = 2; /* block 1 will be the first leaf */ 102fa9e4066Sahrens zp->zap_num_leafs = 1; 103fa9e4066Sahrens zp->zap_num_entries = 0; 104fa9e4066Sahrens zp->zap_salt = zap->zap_salt; 105da6c28aaSamw zp->zap_normflags = zap->zap_normflags; 106b24ab676SJeff Bonwick zp->zap_flags = flags; 107fa9e4066Sahrens 108f65e61c0Sahrens /* block 1 will be the first leaf */ 109f65e61c0Sahrens for (i = 0; i < (1<<zp->zap_ptrtbl.zt_shift); i++) 110f65e61c0Sahrens ZAP_EMBEDDED_PTRTBL_ENT(zap, i) = 1; 111fa9e4066Sahrens 112fa9e4066Sahrens /* 113fa9e4066Sahrens * set up block 1 - the first leaf 114fa9e4066Sahrens */ 115ea8dc4b6Seschrock VERIFY(0 == dmu_buf_hold(zap->zap_objset, zap->zap_object, 11647cb52daSJeff Bonwick 1<<FZAP_BLOCK_SHIFT(zap), FTAG, &db, DMU_READ_NO_PREFETCH)); 117fa9e4066Sahrens dmu_buf_will_dirty(db, tx); 118fa9e4066Sahrens 119fa9e4066Sahrens l = kmem_zalloc(sizeof (zap_leaf_t), KM_SLEEP); 120fa9e4066Sahrens l->l_dbuf = db; 121fa9e4066Sahrens 122de8267e0Stimh zap_leaf_init(l, zp->zap_normflags != 0); 123fa9e4066Sahrens 124fa9e4066Sahrens kmem_free(l, sizeof (zap_leaf_t)); 125ea8dc4b6Seschrock dmu_buf_rele(db, FTAG); 126fa9e4066Sahrens } 127fa9e4066Sahrens 128fa9e4066Sahrens static int 129fa9e4066Sahrens zap_tryupgradedir(zap_t *zap, dmu_tx_t *tx) 130fa9e4066Sahrens { 131fa9e4066Sahrens if (RW_WRITE_HELD(&zap->zap_rwlock)) 132fa9e4066Sahrens return (1); 133fa9e4066Sahrens if (rw_tryupgrade(&zap->zap_rwlock)) { 134fa9e4066Sahrens dmu_buf_will_dirty(zap->zap_dbuf, tx); 135fa9e4066Sahrens return (1); 136fa9e4066Sahrens } 137fa9e4066Sahrens return (0); 138fa9e4066Sahrens } 139fa9e4066Sahrens 140fa9e4066Sahrens /* 141fa9e4066Sahrens * Generic routines for dealing with the pointer & cookie tables. 142fa9e4066Sahrens */ 143fa9e4066Sahrens 14466328dd3Sahrens static int 145fa9e4066Sahrens zap_table_grow(zap_t *zap, zap_table_phys_t *tbl, 146fa9e4066Sahrens void (*transfer_func)(const uint64_t *src, uint64_t *dst, int n), 147fa9e4066Sahrens dmu_tx_t *tx) 148fa9e4066Sahrens { 149fa9e4066Sahrens uint64_t b, newblk; 150fa9e4066Sahrens dmu_buf_t *db_old, *db_new; 151ea8dc4b6Seschrock int err; 152f65e61c0Sahrens int bs = FZAP_BLOCK_SHIFT(zap); 153f65e61c0Sahrens int hepb = 1<<(bs-4); 154fa9e4066Sahrens /* hepb = half the number of entries in a block */ 155fa9e4066Sahrens 156fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 157fa9e4066Sahrens ASSERT(tbl->zt_blk != 0); 158fa9e4066Sahrens ASSERT(tbl->zt_numblks > 0); 159fa9e4066Sahrens 160fa9e4066Sahrens if (tbl->zt_nextblk != 0) { 161fa9e4066Sahrens newblk = tbl->zt_nextblk; 162fa9e4066Sahrens } else { 16366328dd3Sahrens newblk = zap_allocate_blocks(zap, tbl->zt_numblks * 2); 164fa9e4066Sahrens tbl->zt_nextblk = newblk; 165fb09f5aaSMadhav Suresh ASSERT0(tbl->zt_blks_copied); 166a2cdcdd2SPaul Dagnelie dmu_prefetch(zap->zap_objset, zap->zap_object, 0, 167a2cdcdd2SPaul Dagnelie tbl->zt_blk << bs, tbl->zt_numblks << bs, 168a2cdcdd2SPaul Dagnelie ZIO_PRIORITY_SYNC_READ); 169fa9e4066Sahrens } 170fa9e4066Sahrens 171fa9e4066Sahrens /* 17266328dd3Sahrens * Copy the ptrtbl from the old to new location. 173fa9e4066Sahrens */ 174fa9e4066Sahrens 175fa9e4066Sahrens b = tbl->zt_blks_copied; 176ea8dc4b6Seschrock err = dmu_buf_hold(zap->zap_objset, zap->zap_object, 17747cb52daSJeff Bonwick (tbl->zt_blk + b) << bs, FTAG, &db_old, DMU_READ_NO_PREFETCH); 178ea8dc4b6Seschrock if (err) 17966328dd3Sahrens return (err); 180fa9e4066Sahrens 181fa9e4066Sahrens /* first half of entries in old[b] go to new[2*b+0] */ 182ea8dc4b6Seschrock VERIFY(0 == dmu_buf_hold(zap->zap_objset, zap->zap_object, 18347cb52daSJeff Bonwick (newblk + 2*b+0) << bs, FTAG, &db_new, DMU_READ_NO_PREFETCH)); 184fa9e4066Sahrens dmu_buf_will_dirty(db_new, tx); 185fa9e4066Sahrens transfer_func(db_old->db_data, db_new->db_data, hepb); 186ea8dc4b6Seschrock dmu_buf_rele(db_new, FTAG); 187fa9e4066Sahrens 188fa9e4066Sahrens /* second half of entries in old[b] go to new[2*b+1] */ 189ea8dc4b6Seschrock VERIFY(0 == dmu_buf_hold(zap->zap_objset, zap->zap_object, 19047cb52daSJeff Bonwick (newblk + 2*b+1) << bs, FTAG, &db_new, DMU_READ_NO_PREFETCH)); 191fa9e4066Sahrens dmu_buf_will_dirty(db_new, tx); 192fa9e4066Sahrens transfer_func((uint64_t *)db_old->db_data + hepb, 193fa9e4066Sahrens db_new->db_data, hepb); 194ea8dc4b6Seschrock dmu_buf_rele(db_new, FTAG); 195fa9e4066Sahrens 196ea8dc4b6Seschrock dmu_buf_rele(db_old, FTAG); 197fa9e4066Sahrens 198fa9e4066Sahrens tbl->zt_blks_copied++; 199fa9e4066Sahrens 200fa9e4066Sahrens dprintf("copied block %llu of %llu\n", 201fa9e4066Sahrens tbl->zt_blks_copied, tbl->zt_numblks); 202fa9e4066Sahrens 203fa9e4066Sahrens if (tbl->zt_blks_copied == tbl->zt_numblks) { 204ea8dc4b6Seschrock (void) dmu_free_range(zap->zap_objset, zap->zap_object, 205f65e61c0Sahrens tbl->zt_blk << bs, tbl->zt_numblks << bs, tx); 206fa9e4066Sahrens 207fa9e4066Sahrens tbl->zt_blk = newblk; 208fa9e4066Sahrens tbl->zt_numblks *= 2; 209fa9e4066Sahrens tbl->zt_shift++; 210fa9e4066Sahrens tbl->zt_nextblk = 0; 211fa9e4066Sahrens tbl->zt_blks_copied = 0; 212fa9e4066Sahrens 213fa9e4066Sahrens dprintf("finished; numblocks now %llu (%lluk entries)\n", 214fa9e4066Sahrens tbl->zt_numblks, 1<<(tbl->zt_shift-10)); 215fa9e4066Sahrens } 21666328dd3Sahrens 21766328dd3Sahrens return (0); 218fa9e4066Sahrens } 219fa9e4066Sahrens 220ea8dc4b6Seschrock static int 221fa9e4066Sahrens zap_table_store(zap_t *zap, zap_table_phys_t *tbl, uint64_t idx, uint64_t val, 222fa9e4066Sahrens dmu_tx_t *tx) 223fa9e4066Sahrens { 224ea8dc4b6Seschrock int err; 225ea8dc4b6Seschrock uint64_t blk, off; 226f65e61c0Sahrens int bs = FZAP_BLOCK_SHIFT(zap); 227ea8dc4b6Seschrock dmu_buf_t *db; 228fa9e4066Sahrens 229fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 230fa9e4066Sahrens ASSERT(tbl->zt_blk != 0); 231fa9e4066Sahrens 232fa9e4066Sahrens dprintf("storing %llx at index %llx\n", val, idx); 233fa9e4066Sahrens 234f65e61c0Sahrens blk = idx >> (bs-3); 235f65e61c0Sahrens off = idx & ((1<<(bs-3))-1); 236fa9e4066Sahrens 237ea8dc4b6Seschrock err = dmu_buf_hold(zap->zap_objset, zap->zap_object, 23847cb52daSJeff Bonwick (tbl->zt_blk + blk) << bs, FTAG, &db, DMU_READ_NO_PREFETCH); 239ea8dc4b6Seschrock if (err) 240ea8dc4b6Seschrock return (err); 241fa9e4066Sahrens dmu_buf_will_dirty(db, tx); 242fa9e4066Sahrens 243fa9e4066Sahrens if (tbl->zt_nextblk != 0) { 244ea8dc4b6Seschrock uint64_t idx2 = idx * 2; 245ea8dc4b6Seschrock uint64_t blk2 = idx2 >> (bs-3); 246ea8dc4b6Seschrock uint64_t off2 = idx2 & ((1<<(bs-3))-1); 247ea8dc4b6Seschrock dmu_buf_t *db2; 248ea8dc4b6Seschrock 249ea8dc4b6Seschrock err = dmu_buf_hold(zap->zap_objset, zap->zap_object, 25047cb52daSJeff Bonwick (tbl->zt_nextblk + blk2) << bs, FTAG, &db2, 25147cb52daSJeff Bonwick DMU_READ_NO_PREFETCH); 252ea8dc4b6Seschrock if (err) { 253ea8dc4b6Seschrock dmu_buf_rele(db, FTAG); 254ea8dc4b6Seschrock return (err); 255ea8dc4b6Seschrock } 256ea8dc4b6Seschrock dmu_buf_will_dirty(db2, tx); 257ea8dc4b6Seschrock ((uint64_t *)db2->db_data)[off2] = val; 258ea8dc4b6Seschrock ((uint64_t *)db2->db_data)[off2+1] = val; 259ea8dc4b6Seschrock dmu_buf_rele(db2, FTAG); 260fa9e4066Sahrens } 261fa9e4066Sahrens 262ea8dc4b6Seschrock ((uint64_t *)db->db_data)[off] = val; 263ea8dc4b6Seschrock dmu_buf_rele(db, FTAG); 264ea8dc4b6Seschrock 265ea8dc4b6Seschrock return (0); 266fa9e4066Sahrens } 267fa9e4066Sahrens 268ea8dc4b6Seschrock static int 269ea8dc4b6Seschrock zap_table_load(zap_t *zap, zap_table_phys_t *tbl, uint64_t idx, uint64_t *valp) 270fa9e4066Sahrens { 271ea8dc4b6Seschrock uint64_t blk, off; 272ea8dc4b6Seschrock int err; 273fa9e4066Sahrens dmu_buf_t *db; 27479d72832SMatthew Ahrens dnode_t *dn; 275f65e61c0Sahrens int bs = FZAP_BLOCK_SHIFT(zap); 276fa9e4066Sahrens 277fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 278fa9e4066Sahrens 279f65e61c0Sahrens blk = idx >> (bs-3); 280f65e61c0Sahrens off = idx & ((1<<(bs-3))-1); 281fa9e4066Sahrens 28279d72832SMatthew Ahrens /* 28379d72832SMatthew Ahrens * Note: this is equivalent to dmu_buf_hold(), but we use 28479d72832SMatthew Ahrens * _dnode_enter / _by_dnode because it's faster because we don't 28579d72832SMatthew Ahrens * have to hold the dnode. 28679d72832SMatthew Ahrens */ 28779d72832SMatthew Ahrens dn = dmu_buf_dnode_enter(zap->zap_dbuf); 28879d72832SMatthew Ahrens err = dmu_buf_hold_by_dnode(dn, 28947cb52daSJeff Bonwick (tbl->zt_blk + blk) << bs, FTAG, &db, DMU_READ_NO_PREFETCH); 29079d72832SMatthew Ahrens dmu_buf_dnode_exit(zap->zap_dbuf); 291ea8dc4b6Seschrock if (err) 292ea8dc4b6Seschrock return (err); 293ea8dc4b6Seschrock *valp = ((uint64_t *)db->db_data)[off]; 294ea8dc4b6Seschrock dmu_buf_rele(db, FTAG); 295ea8dc4b6Seschrock 296ea8dc4b6Seschrock if (tbl->zt_nextblk != 0) { 297ea8dc4b6Seschrock /* 298ea8dc4b6Seschrock * read the nextblk for the sake of i/o error checking, 299ea8dc4b6Seschrock * so that zap_table_load() will catch errors for 300ea8dc4b6Seschrock * zap_table_store. 301ea8dc4b6Seschrock */ 302ea8dc4b6Seschrock blk = (idx*2) >> (bs-3); 303ea8dc4b6Seschrock 30479d72832SMatthew Ahrens dn = dmu_buf_dnode_enter(zap->zap_dbuf); 30579d72832SMatthew Ahrens err = dmu_buf_hold_by_dnode(dn, 30647cb52daSJeff Bonwick (tbl->zt_nextblk + blk) << bs, FTAG, &db, 30747cb52daSJeff Bonwick DMU_READ_NO_PREFETCH); 30879d72832SMatthew Ahrens dmu_buf_dnode_exit(zap->zap_dbuf); 309b287be1bSWill Andrews if (err == 0) 310b287be1bSWill Andrews dmu_buf_rele(db, FTAG); 311ea8dc4b6Seschrock } 312ea8dc4b6Seschrock return (err); 313fa9e4066Sahrens } 314fa9e4066Sahrens 315fa9e4066Sahrens /* 316fa9e4066Sahrens * Routines for growing the ptrtbl. 317fa9e4066Sahrens */ 318fa9e4066Sahrens 319fa9e4066Sahrens static void 320fa9e4066Sahrens zap_ptrtbl_transfer(const uint64_t *src, uint64_t *dst, int n) 321fa9e4066Sahrens { 322fa9e4066Sahrens int i; 323fa9e4066Sahrens for (i = 0; i < n; i++) { 324fa9e4066Sahrens uint64_t lb = src[i]; 325fa9e4066Sahrens dst[2*i+0] = lb; 326fa9e4066Sahrens dst[2*i+1] = lb; 327fa9e4066Sahrens } 328fa9e4066Sahrens } 329fa9e4066Sahrens 33066328dd3Sahrens static int 331fa9e4066Sahrens zap_grow_ptrtbl(zap_t *zap, dmu_tx_t *tx) 332fa9e4066Sahrens { 333b24ab676SJeff Bonwick /* 334b24ab676SJeff Bonwick * The pointer table should never use more hash bits than we 335b24ab676SJeff Bonwick * have (otherwise we'd be using useless zero bits to index it). 336b24ab676SJeff Bonwick * If we are within 2 bits of running out, stop growing, since 337b24ab676SJeff Bonwick * this is already an aberrant condition. 338b24ab676SJeff Bonwick */ 339c1379625SJustin T. Gibbs if (zap_f_phys(zap)->zap_ptrtbl.zt_shift >= zap_hashbits(zap) - 2) 340be6fd75aSMatthew Ahrens return (SET_ERROR(ENOSPC)); 341fa9e4066Sahrens 342c1379625SJustin T. Gibbs if (zap_f_phys(zap)->zap_ptrtbl.zt_numblks == 0) { 343fa9e4066Sahrens /* 344f65e61c0Sahrens * We are outgrowing the "embedded" ptrtbl (the one 345f65e61c0Sahrens * stored in the header block). Give it its own entire 346f65e61c0Sahrens * block, which will double the size of the ptrtbl. 347fa9e4066Sahrens */ 348fa9e4066Sahrens uint64_t newblk; 349fa9e4066Sahrens dmu_buf_t *db_new; 350ea8dc4b6Seschrock int err; 351fa9e4066Sahrens 352c1379625SJustin T. Gibbs ASSERT3U(zap_f_phys(zap)->zap_ptrtbl.zt_shift, ==, 353f65e61c0Sahrens ZAP_EMBEDDED_PTRTBL_SHIFT(zap)); 354c1379625SJustin T. Gibbs ASSERT0(zap_f_phys(zap)->zap_ptrtbl.zt_blk); 355fa9e4066Sahrens 35666328dd3Sahrens newblk = zap_allocate_blocks(zap, 1); 357ea8dc4b6Seschrock err = dmu_buf_hold(zap->zap_objset, zap->zap_object, 35847cb52daSJeff Bonwick newblk << FZAP_BLOCK_SHIFT(zap), FTAG, &db_new, 35947cb52daSJeff Bonwick DMU_READ_NO_PREFETCH); 360ea8dc4b6Seschrock if (err) 36166328dd3Sahrens return (err); 362fa9e4066Sahrens dmu_buf_will_dirty(db_new, tx); 363f65e61c0Sahrens zap_ptrtbl_transfer(&ZAP_EMBEDDED_PTRTBL_ENT(zap, 0), 364f65e61c0Sahrens db_new->db_data, 1 << ZAP_EMBEDDED_PTRTBL_SHIFT(zap)); 365ea8dc4b6Seschrock dmu_buf_rele(db_new, FTAG); 366fa9e4066Sahrens 367c1379625SJustin T. Gibbs zap_f_phys(zap)->zap_ptrtbl.zt_blk = newblk; 368c1379625SJustin T. Gibbs zap_f_phys(zap)->zap_ptrtbl.zt_numblks = 1; 369c1379625SJustin T. Gibbs zap_f_phys(zap)->zap_ptrtbl.zt_shift++; 370fa9e4066Sahrens 371c1379625SJustin T. Gibbs ASSERT3U(1ULL << zap_f_phys(zap)->zap_ptrtbl.zt_shift, ==, 372c1379625SJustin T. Gibbs zap_f_phys(zap)->zap_ptrtbl.zt_numblks << 373f65e61c0Sahrens (FZAP_BLOCK_SHIFT(zap)-3)); 37466328dd3Sahrens 37566328dd3Sahrens return (0); 376fa9e4066Sahrens } else { 377c1379625SJustin T. Gibbs return (zap_table_grow(zap, &zap_f_phys(zap)->zap_ptrtbl, 37866328dd3Sahrens zap_ptrtbl_transfer, tx)); 379fa9e4066Sahrens } 380fa9e4066Sahrens } 381fa9e4066Sahrens 382fa9e4066Sahrens static void 383fa9e4066Sahrens zap_increment_num_entries(zap_t *zap, int delta, dmu_tx_t *tx) 384fa9e4066Sahrens { 385fa9e4066Sahrens dmu_buf_will_dirty(zap->zap_dbuf, tx); 386fa9e4066Sahrens mutex_enter(&zap->zap_f.zap_num_entries_mtx); 387c1379625SJustin T. Gibbs ASSERT(delta > 0 || zap_f_phys(zap)->zap_num_entries >= -delta); 388c1379625SJustin T. Gibbs zap_f_phys(zap)->zap_num_entries += delta; 389fa9e4066Sahrens mutex_exit(&zap->zap_f.zap_num_entries_mtx); 390fa9e4066Sahrens } 391fa9e4066Sahrens 39266328dd3Sahrens static uint64_t 39366328dd3Sahrens zap_allocate_blocks(zap_t *zap, int nblocks) 394fa9e4066Sahrens { 395fa9e4066Sahrens uint64_t newblk; 39666328dd3Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 397c1379625SJustin T. Gibbs newblk = zap_f_phys(zap)->zap_freeblk; 398c1379625SJustin T. Gibbs zap_f_phys(zap)->zap_freeblk += nblocks; 399fa9e4066Sahrens return (newblk); 400fa9e4066Sahrens } 401fa9e4066Sahrens 402bc9014e6SJustin Gibbs static void 403*40510e8eSJosef 'Jeff' Sipek zap_leaf_evict_sync(void *dbu) 404bc9014e6SJustin Gibbs { 405bc9014e6SJustin Gibbs zap_leaf_t *l = dbu; 406bc9014e6SJustin Gibbs 407bc9014e6SJustin Gibbs rw_destroy(&l->l_rwlock); 408bc9014e6SJustin Gibbs kmem_free(l, sizeof (zap_leaf_t)); 409bc9014e6SJustin Gibbs } 410bc9014e6SJustin Gibbs 41166328dd3Sahrens static zap_leaf_t * 412fa9e4066Sahrens zap_create_leaf(zap_t *zap, dmu_tx_t *tx) 413fa9e4066Sahrens { 414fa9e4066Sahrens void *winner; 415bc9014e6SJustin Gibbs zap_leaf_t *l = kmem_zalloc(sizeof (zap_leaf_t), KM_SLEEP); 416fa9e4066Sahrens 417fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 418fa9e4066Sahrens 419fa9e4066Sahrens rw_init(&l->l_rwlock, 0, 0, 0); 420fa9e4066Sahrens rw_enter(&l->l_rwlock, RW_WRITER); 42166328dd3Sahrens l->l_blkid = zap_allocate_blocks(zap, 1); 422fa9e4066Sahrens l->l_dbuf = NULL; 423fa9e4066Sahrens 424ea8dc4b6Seschrock VERIFY(0 == dmu_buf_hold(zap->zap_objset, zap->zap_object, 42547cb52daSJeff Bonwick l->l_blkid << FZAP_BLOCK_SHIFT(zap), NULL, &l->l_dbuf, 42647cb52daSJeff Bonwick DMU_READ_NO_PREFETCH)); 427*40510e8eSJosef 'Jeff' Sipek dmu_buf_init_user(&l->l_dbu, zap_leaf_evict_sync, NULL, &l->l_dbuf); 428bc9014e6SJustin Gibbs winner = dmu_buf_set_user(l->l_dbuf, &l->l_dbu); 429fa9e4066Sahrens ASSERT(winner == NULL); 430fa9e4066Sahrens dmu_buf_will_dirty(l->l_dbuf, tx); 431fa9e4066Sahrens 432de8267e0Stimh zap_leaf_init(l, zap->zap_normflags != 0); 433fa9e4066Sahrens 434c1379625SJustin T. Gibbs zap_f_phys(zap)->zap_num_leafs++; 435fa9e4066Sahrens 43666328dd3Sahrens return (l); 437fa9e4066Sahrens } 438fa9e4066Sahrens 439fa9e4066Sahrens int 440fa9e4066Sahrens fzap_count(zap_t *zap, uint64_t *count) 441fa9e4066Sahrens { 442fa9e4066Sahrens ASSERT(!zap->zap_ismicro); 443fa9e4066Sahrens mutex_enter(&zap->zap_f.zap_num_entries_mtx); /* unnecessary */ 444c1379625SJustin T. Gibbs *count = zap_f_phys(zap)->zap_num_entries; 445fa9e4066Sahrens mutex_exit(&zap->zap_f.zap_num_entries_mtx); 446fa9e4066Sahrens return (0); 447fa9e4066Sahrens } 448fa9e4066Sahrens 449fa9e4066Sahrens /* 450fa9e4066Sahrens * Routines for obtaining zap_leaf_t's 451fa9e4066Sahrens */ 452fa9e4066Sahrens 45387e5029aSahrens void 454fa9e4066Sahrens zap_put_leaf(zap_leaf_t *l) 455fa9e4066Sahrens { 456fa9e4066Sahrens rw_exit(&l->l_rwlock); 457ea8dc4b6Seschrock dmu_buf_rele(l->l_dbuf, NULL); 458fa9e4066Sahrens } 459fa9e4066Sahrens 460fa9e4066Sahrens static zap_leaf_t * 461fa9e4066Sahrens zap_open_leaf(uint64_t blkid, dmu_buf_t *db) 462fa9e4066Sahrens { 463fa9e4066Sahrens zap_leaf_t *l, *winner; 464fa9e4066Sahrens 465fa9e4066Sahrens ASSERT(blkid != 0); 466fa9e4066Sahrens 467bc9014e6SJustin Gibbs l = kmem_zalloc(sizeof (zap_leaf_t), KM_SLEEP); 468fa9e4066Sahrens rw_init(&l->l_rwlock, 0, 0, 0); 469fa9e4066Sahrens rw_enter(&l->l_rwlock, RW_WRITER); 470fa9e4066Sahrens l->l_blkid = blkid; 471bf16b11eSMatthew Ahrens l->l_bs = highbit64(db->db_size) - 1; 472fa9e4066Sahrens l->l_dbuf = db; 473fa9e4066Sahrens 474*40510e8eSJosef 'Jeff' Sipek dmu_buf_init_user(&l->l_dbu, zap_leaf_evict_sync, NULL, &l->l_dbuf); 475bc9014e6SJustin Gibbs winner = dmu_buf_set_user(db, &l->l_dbu); 476fa9e4066Sahrens 477fa9e4066Sahrens rw_exit(&l->l_rwlock); 478fa9e4066Sahrens if (winner != NULL) { 479fa9e4066Sahrens /* someone else set it first */ 480*40510e8eSJosef 'Jeff' Sipek zap_leaf_evict_sync(&l->l_dbu); 481fa9e4066Sahrens l = winner; 482fa9e4066Sahrens } 483fa9e4066Sahrens 48466328dd3Sahrens /* 48566328dd3Sahrens * lhr_pad was previously used for the next leaf in the leaf 48666328dd3Sahrens * chain. There should be no chained leafs (as we have removed 48766328dd3Sahrens * support for them). 48866328dd3Sahrens */ 489c1379625SJustin T. Gibbs ASSERT0(zap_leaf_phys(l)->l_hdr.lh_pad1); 49066328dd3Sahrens 491f65e61c0Sahrens /* 492f65e61c0Sahrens * There should be more hash entries than there can be 493f65e61c0Sahrens * chunks to put in the hash table 494f65e61c0Sahrens */ 495f65e61c0Sahrens ASSERT3U(ZAP_LEAF_HASH_NUMENTRIES(l), >, ZAP_LEAF_NUMCHUNKS(l) / 3); 496f65e61c0Sahrens 497f65e61c0Sahrens /* The chunks should begin at the end of the hash table */ 498f65e61c0Sahrens ASSERT3P(&ZAP_LEAF_CHUNK(l, 0), ==, 499c1379625SJustin T. Gibbs &zap_leaf_phys(l)->l_hash[ZAP_LEAF_HASH_NUMENTRIES(l)]); 500f65e61c0Sahrens 501f65e61c0Sahrens /* The chunks should end at the end of the block */ 502f65e61c0Sahrens ASSERT3U((uintptr_t)&ZAP_LEAF_CHUNK(l, ZAP_LEAF_NUMCHUNKS(l)) - 503c1379625SJustin T. Gibbs (uintptr_t)zap_leaf_phys(l), ==, l->l_dbuf->db_size); 504f65e61c0Sahrens 505fa9e4066Sahrens return (l); 506fa9e4066Sahrens } 507fa9e4066Sahrens 508ea8dc4b6Seschrock static int 50966328dd3Sahrens zap_get_leaf_byblk(zap_t *zap, uint64_t blkid, dmu_tx_t *tx, krw_t lt, 510ea8dc4b6Seschrock zap_leaf_t **lp) 511fa9e4066Sahrens { 512fa9e4066Sahrens dmu_buf_t *db; 513fa9e4066Sahrens zap_leaf_t *l; 514f65e61c0Sahrens int bs = FZAP_BLOCK_SHIFT(zap); 515ea8dc4b6Seschrock int err; 516fa9e4066Sahrens 517fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 518fa9e4066Sahrens 51979d72832SMatthew Ahrens dnode_t *dn = dmu_buf_dnode_enter(zap->zap_dbuf); 52079d72832SMatthew Ahrens err = dmu_buf_hold_by_dnode(dn, 52147cb52daSJeff Bonwick blkid << bs, NULL, &db, DMU_READ_NO_PREFETCH); 52279d72832SMatthew Ahrens dmu_buf_dnode_exit(zap->zap_dbuf); 523ea8dc4b6Seschrock if (err) 524ea8dc4b6Seschrock return (err); 525fa9e4066Sahrens 526fa9e4066Sahrens ASSERT3U(db->db_object, ==, zap->zap_object); 527f65e61c0Sahrens ASSERT3U(db->db_offset, ==, blkid << bs); 528f65e61c0Sahrens ASSERT3U(db->db_size, ==, 1 << bs); 529fa9e4066Sahrens ASSERT(blkid != 0); 530fa9e4066Sahrens 531fa9e4066Sahrens l = dmu_buf_get_user(db); 532fa9e4066Sahrens 533fa9e4066Sahrens if (l == NULL) 534fa9e4066Sahrens l = zap_open_leaf(blkid, db); 535fa9e4066Sahrens 536fa9e4066Sahrens rw_enter(&l->l_rwlock, lt); 537fa9e4066Sahrens /* 538c1379625SJustin T. Gibbs * Must lock before dirtying, otherwise zap_leaf_phys(l) could change, 539fa9e4066Sahrens * causing ASSERT below to fail. 540fa9e4066Sahrens */ 541fa9e4066Sahrens if (lt == RW_WRITER) 542fa9e4066Sahrens dmu_buf_will_dirty(db, tx); 543fa9e4066Sahrens ASSERT3U(l->l_blkid, ==, blkid); 544fa9e4066Sahrens ASSERT3P(l->l_dbuf, ==, db); 545c1379625SJustin T. Gibbs ASSERT3U(zap_leaf_phys(l)->l_hdr.lh_block_type, ==, ZBT_LEAF); 546c1379625SJustin T. Gibbs ASSERT3U(zap_leaf_phys(l)->l_hdr.lh_magic, ==, ZAP_LEAF_MAGIC); 547fa9e4066Sahrens 548ea8dc4b6Seschrock *lp = l; 549ea8dc4b6Seschrock return (0); 550fa9e4066Sahrens } 551fa9e4066Sahrens 552ea8dc4b6Seschrock static int 553ea8dc4b6Seschrock zap_idx_to_blk(zap_t *zap, uint64_t idx, uint64_t *valp) 554fa9e4066Sahrens { 555fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 556fa9e4066Sahrens 557c1379625SJustin T. Gibbs if (zap_f_phys(zap)->zap_ptrtbl.zt_numblks == 0) { 558fa9e4066Sahrens ASSERT3U(idx, <, 559c1379625SJustin T. Gibbs (1ULL << zap_f_phys(zap)->zap_ptrtbl.zt_shift)); 560ea8dc4b6Seschrock *valp = ZAP_EMBEDDED_PTRTBL_ENT(zap, idx); 561ea8dc4b6Seschrock return (0); 562fa9e4066Sahrens } else { 563c1379625SJustin T. Gibbs return (zap_table_load(zap, &zap_f_phys(zap)->zap_ptrtbl, 564ea8dc4b6Seschrock idx, valp)); 565fa9e4066Sahrens } 566fa9e4066Sahrens } 567fa9e4066Sahrens 568ea8dc4b6Seschrock static int 569fa9e4066Sahrens zap_set_idx_to_blk(zap_t *zap, uint64_t idx, uint64_t blk, dmu_tx_t *tx) 570fa9e4066Sahrens { 571fa9e4066Sahrens ASSERT(tx != NULL); 572fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 573fa9e4066Sahrens 574c1379625SJustin T. Gibbs if (zap_f_phys(zap)->zap_ptrtbl.zt_blk == 0) { 575f65e61c0Sahrens ZAP_EMBEDDED_PTRTBL_ENT(zap, idx) = blk; 576ea8dc4b6Seschrock return (0); 577fa9e4066Sahrens } else { 578c1379625SJustin T. Gibbs return (zap_table_store(zap, &zap_f_phys(zap)->zap_ptrtbl, 579ea8dc4b6Seschrock idx, blk, tx)); 580fa9e4066Sahrens } 581fa9e4066Sahrens } 582fa9e4066Sahrens 583ea8dc4b6Seschrock static int 584ea8dc4b6Seschrock zap_deref_leaf(zap_t *zap, uint64_t h, dmu_tx_t *tx, krw_t lt, zap_leaf_t **lp) 585fa9e4066Sahrens { 586ea8dc4b6Seschrock uint64_t idx, blk; 587ea8dc4b6Seschrock int err; 588fa9e4066Sahrens 589fa9e4066Sahrens ASSERT(zap->zap_dbuf == NULL || 590c1379625SJustin T. Gibbs zap_f_phys(zap) == zap->zap_dbuf->db_data); 59102525cd0SChunwei Chen 59202525cd0SChunwei Chen /* Reality check for corrupt zap objects (leaf or header). */ 59302525cd0SChunwei Chen if ((zap_f_phys(zap)->zap_block_type != ZBT_LEAF && 59402525cd0SChunwei Chen zap_f_phys(zap)->zap_block_type != ZBT_HEADER) || 59502525cd0SChunwei Chen zap_f_phys(zap)->zap_magic != ZAP_MAGIC) { 59602525cd0SChunwei Chen return (SET_ERROR(EIO)); 59702525cd0SChunwei Chen } 59802525cd0SChunwei Chen 599c1379625SJustin T. Gibbs idx = ZAP_HASH_IDX(h, zap_f_phys(zap)->zap_ptrtbl.zt_shift); 600ea8dc4b6Seschrock err = zap_idx_to_blk(zap, idx, &blk); 601ea8dc4b6Seschrock if (err != 0) 602ea8dc4b6Seschrock return (err); 603ea8dc4b6Seschrock err = zap_get_leaf_byblk(zap, blk, tx, lt, lp); 604fa9e4066Sahrens 605c1379625SJustin T. Gibbs ASSERT(err || 606c1379625SJustin T. Gibbs ZAP_HASH_IDX(h, zap_leaf_phys(*lp)->l_hdr.lh_prefix_len) == 607c1379625SJustin T. Gibbs zap_leaf_phys(*lp)->l_hdr.lh_prefix); 608ea8dc4b6Seschrock return (err); 609fa9e4066Sahrens } 610fa9e4066Sahrens 611ea8dc4b6Seschrock static int 612ae972795SMatthew Ahrens zap_expand_leaf(zap_name_t *zn, zap_leaf_t *l, 613ae972795SMatthew Ahrens void *tag, dmu_tx_t *tx, zap_leaf_t **lp) 614fa9e4066Sahrens { 615ad860c82Sbonwick zap_t *zap = zn->zn_zap; 616ad860c82Sbonwick uint64_t hash = zn->zn_hash; 617fa9e4066Sahrens zap_leaf_t *nl; 618fa9e4066Sahrens int prefix_diff, i, err; 619fa9e4066Sahrens uint64_t sibling; 620c1379625SJustin T. Gibbs int old_prefix_len = zap_leaf_phys(l)->l_hdr.lh_prefix_len; 621fa9e4066Sahrens 622c1379625SJustin T. Gibbs ASSERT3U(old_prefix_len, <=, zap_f_phys(zap)->zap_ptrtbl.zt_shift); 623fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 624fa9e4066Sahrens 62566328dd3Sahrens ASSERT3U(ZAP_HASH_IDX(hash, old_prefix_len), ==, 626c1379625SJustin T. Gibbs zap_leaf_phys(l)->l_hdr.lh_prefix); 627fa9e4066Sahrens 62866328dd3Sahrens if (zap_tryupgradedir(zap, tx) == 0 || 629c1379625SJustin T. Gibbs old_prefix_len == zap_f_phys(zap)->zap_ptrtbl.zt_shift) { 63066328dd3Sahrens /* We failed to upgrade, or need to grow the pointer table */ 631fa9e4066Sahrens objset_t *os = zap->zap_objset; 632fa9e4066Sahrens uint64_t object = zap->zap_object; 633fa9e4066Sahrens 634fa9e4066Sahrens zap_put_leaf(l); 635ae972795SMatthew Ahrens zap_unlockdir(zap, tag); 636c5f9e431Sahrens err = zap_lockdir(os, object, tx, RW_WRITER, 637ae972795SMatthew Ahrens FALSE, FALSE, tag, &zn->zn_zap); 638ad860c82Sbonwick zap = zn->zn_zap; 63966328dd3Sahrens if (err) 64066328dd3Sahrens return (err); 641fa9e4066Sahrens ASSERT(!zap->zap_ismicro); 642fa9e4066Sahrens 64366328dd3Sahrens while (old_prefix_len == 644c1379625SJustin T. Gibbs zap_f_phys(zap)->zap_ptrtbl.zt_shift) { 64566328dd3Sahrens err = zap_grow_ptrtbl(zap, tx); 64666328dd3Sahrens if (err) 64766328dd3Sahrens return (err); 64866328dd3Sahrens } 64966328dd3Sahrens 65066328dd3Sahrens err = zap_deref_leaf(zap, hash, tx, RW_WRITER, &l); 65166328dd3Sahrens if (err) 65266328dd3Sahrens return (err); 65366328dd3Sahrens 654c1379625SJustin T. Gibbs if (zap_leaf_phys(l)->l_hdr.lh_prefix_len != old_prefix_len) { 655fa9e4066Sahrens /* it split while our locks were down */ 656ea8dc4b6Seschrock *lp = l; 657ea8dc4b6Seschrock return (0); 658ea8dc4b6Seschrock } 659fa9e4066Sahrens } 660fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 661c1379625SJustin T. Gibbs ASSERT3U(old_prefix_len, <, zap_f_phys(zap)->zap_ptrtbl.zt_shift); 66266328dd3Sahrens ASSERT3U(ZAP_HASH_IDX(hash, old_prefix_len), ==, 663c1379625SJustin T. Gibbs zap_leaf_phys(l)->l_hdr.lh_prefix); 664fa9e4066Sahrens 665c1379625SJustin T. Gibbs prefix_diff = zap_f_phys(zap)->zap_ptrtbl.zt_shift - 66666328dd3Sahrens (old_prefix_len + 1); 66766328dd3Sahrens sibling = (ZAP_HASH_IDX(hash, old_prefix_len + 1) | 1) << prefix_diff; 668ea8dc4b6Seschrock 669ea8dc4b6Seschrock /* check for i/o errors before doing zap_leaf_split */ 670fa9e4066Sahrens for (i = 0; i < (1ULL<<prefix_diff); i++) { 671ea8dc4b6Seschrock uint64_t blk; 672ea8dc4b6Seschrock err = zap_idx_to_blk(zap, sibling+i, &blk); 673ea8dc4b6Seschrock if (err) 674ea8dc4b6Seschrock return (err); 675ea8dc4b6Seschrock ASSERT3U(blk, ==, l->l_blkid); 676ea8dc4b6Seschrock } 677ea8dc4b6Seschrock 67866328dd3Sahrens nl = zap_create_leaf(zap, tx); 679de8267e0Stimh zap_leaf_split(l, nl, zap->zap_normflags != 0); 680ea8dc4b6Seschrock 68166328dd3Sahrens /* set sibling pointers */ 682fb09f5aaSMadhav Suresh for (i = 0; i < (1ULL << prefix_diff); i++) { 683ea8dc4b6Seschrock err = zap_set_idx_to_blk(zap, sibling+i, nl->l_blkid, tx); 684fb09f5aaSMadhav Suresh ASSERT0(err); /* we checked for i/o errors above */ 685fa9e4066Sahrens } 686fa9e4066Sahrens 687c1379625SJustin T. Gibbs if (hash & (1ULL << (64 - zap_leaf_phys(l)->l_hdr.lh_prefix_len))) { 688fa9e4066Sahrens /* we want the sibling */ 689fa9e4066Sahrens zap_put_leaf(l); 69066328dd3Sahrens *lp = nl; 691fa9e4066Sahrens } else { 692fa9e4066Sahrens zap_put_leaf(nl); 69366328dd3Sahrens *lp = l; 694fa9e4066Sahrens } 695fa9e4066Sahrens 696ea8dc4b6Seschrock return (0); 697fa9e4066Sahrens } 698fa9e4066Sahrens 699fa9e4066Sahrens static void 700ae972795SMatthew Ahrens zap_put_leaf_maybe_grow_ptrtbl(zap_name_t *zn, zap_leaf_t *l, 701ae972795SMatthew Ahrens void *tag, dmu_tx_t *tx) 702fa9e4066Sahrens { 703ad860c82Sbonwick zap_t *zap = zn->zn_zap; 704c1379625SJustin T. Gibbs int shift = zap_f_phys(zap)->zap_ptrtbl.zt_shift; 705c1379625SJustin T. Gibbs int leaffull = (zap_leaf_phys(l)->l_hdr.lh_prefix_len == shift && 706c1379625SJustin T. Gibbs zap_leaf_phys(l)->l_hdr.lh_nfree < ZAP_LEAF_LOW_WATER); 707fa9e4066Sahrens 70866328dd3Sahrens zap_put_leaf(l); 709fa9e4066Sahrens 710c1379625SJustin T. Gibbs if (leaffull || zap_f_phys(zap)->zap_ptrtbl.zt_nextblk) { 71166328dd3Sahrens int err; 712fa9e4066Sahrens 71366328dd3Sahrens /* 71466328dd3Sahrens * We are in the middle of growing the pointer table, or 71566328dd3Sahrens * this leaf will soon make us grow it. 71666328dd3Sahrens */ 717fa9e4066Sahrens if (zap_tryupgradedir(zap, tx) == 0) { 718fa9e4066Sahrens objset_t *os = zap->zap_objset; 719fa9e4066Sahrens uint64_t zapobj = zap->zap_object; 720fa9e4066Sahrens 721ae972795SMatthew Ahrens zap_unlockdir(zap, tag); 722fa9e4066Sahrens err = zap_lockdir(os, zapobj, tx, 723ae972795SMatthew Ahrens RW_WRITER, FALSE, FALSE, tag, &zn->zn_zap); 724ad860c82Sbonwick zap = zn->zn_zap; 72566328dd3Sahrens if (err) 72666328dd3Sahrens return; 727fa9e4066Sahrens } 728fa9e4066Sahrens 72966328dd3Sahrens /* could have finished growing while our locks were down */ 730c1379625SJustin T. Gibbs if (zap_f_phys(zap)->zap_ptrtbl.zt_shift == shift) 73166328dd3Sahrens (void) zap_grow_ptrtbl(zap, tx); 732fa9e4066Sahrens } 733fa9e4066Sahrens } 734fa9e4066Sahrens 735fa9e4066Sahrens static int 73692241e0bSTom Erickson fzap_checkname(zap_name_t *zn) 737fa9e4066Sahrens { 738486ae710SMatthew Ahrens if (zn->zn_key_orig_numints * zn->zn_key_intlen > ZAP_MAXNAMELEN) 739be6fd75aSMatthew Ahrens return (SET_ERROR(ENAMETOOLONG)); 74092241e0bSTom Erickson return (0); 74192241e0bSTom Erickson } 74266328dd3Sahrens 74392241e0bSTom Erickson static int 74492241e0bSTom Erickson fzap_checksize(uint64_t integer_size, uint64_t num_integers) 74592241e0bSTom Erickson { 746fa9e4066Sahrens /* Only integer sizes supported by C */ 747fa9e4066Sahrens switch (integer_size) { 748fa9e4066Sahrens case 1: 749fa9e4066Sahrens case 2: 750fa9e4066Sahrens case 4: 751fa9e4066Sahrens case 8: 752fa9e4066Sahrens break; 753fa9e4066Sahrens default: 754be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL)); 755fa9e4066Sahrens } 756fa9e4066Sahrens 75766328dd3Sahrens if (integer_size * num_integers > ZAP_MAXVALUELEN) 75866328dd3Sahrens return (E2BIG); 759fa9e4066Sahrens 760fa9e4066Sahrens return (0); 761fa9e4066Sahrens } 762fa9e4066Sahrens 76392241e0bSTom Erickson static int 76492241e0bSTom Erickson fzap_check(zap_name_t *zn, uint64_t integer_size, uint64_t num_integers) 76592241e0bSTom Erickson { 76692241e0bSTom Erickson int err; 76792241e0bSTom Erickson 76892241e0bSTom Erickson if ((err = fzap_checkname(zn)) != 0) 76992241e0bSTom Erickson return (err); 77092241e0bSTom Erickson return (fzap_checksize(integer_size, num_integers)); 77192241e0bSTom Erickson } 77292241e0bSTom Erickson 773fa9e4066Sahrens /* 774da6c28aaSamw * Routines for manipulating attributes. 775fa9e4066Sahrens */ 776fa9e4066Sahrens int 777da6c28aaSamw fzap_lookup(zap_name_t *zn, 778da6c28aaSamw uint64_t integer_size, uint64_t num_integers, void *buf, 779da6c28aaSamw char *realname, int rn_len, boolean_t *ncp) 780fa9e4066Sahrens { 781fa9e4066Sahrens zap_leaf_t *l; 782fa9e4066Sahrens int err; 783fa9e4066Sahrens zap_entry_handle_t zeh; 784fa9e4066Sahrens 78592241e0bSTom Erickson if ((err = fzap_checkname(zn)) != 0) 786fa9e4066Sahrens return (err); 787fa9e4066Sahrens 788da6c28aaSamw err = zap_deref_leaf(zn->zn_zap, zn->zn_hash, NULL, RW_READER, &l); 789ea8dc4b6Seschrock if (err != 0) 790ea8dc4b6Seschrock return (err); 791da6c28aaSamw err = zap_leaf_lookup(l, zn, &zeh); 792da6c28aaSamw if (err == 0) { 79392241e0bSTom Erickson if ((err = fzap_checksize(integer_size, num_integers)) != 0) { 79492241e0bSTom Erickson zap_put_leaf(l); 79592241e0bSTom Erickson return (err); 79692241e0bSTom Erickson } 79792241e0bSTom Erickson 79866328dd3Sahrens err = zap_entry_read(&zeh, integer_size, num_integers, buf); 799b24ab676SJeff Bonwick (void) zap_entry_read_name(zn->zn_zap, &zeh, rn_len, realname); 800da6c28aaSamw if (ncp) { 801da6c28aaSamw *ncp = zap_entry_normalization_conflict(&zeh, 802da6c28aaSamw zn, NULL, zn->zn_zap); 803da6c28aaSamw } 804da6c28aaSamw } 80566328dd3Sahrens 806fa9e4066Sahrens zap_put_leaf(l); 807fa9e4066Sahrens return (err); 808fa9e4066Sahrens } 809fa9e4066Sahrens 810fa9e4066Sahrens int 811da6c28aaSamw fzap_add_cd(zap_name_t *zn, 812fa9e4066Sahrens uint64_t integer_size, uint64_t num_integers, 813ae972795SMatthew Ahrens const void *val, uint32_t cd, void *tag, dmu_tx_t *tx) 814fa9e4066Sahrens { 815fa9e4066Sahrens zap_leaf_t *l; 816fa9e4066Sahrens int err; 817fa9e4066Sahrens zap_entry_handle_t zeh; 818da6c28aaSamw zap_t *zap = zn->zn_zap; 819fa9e4066Sahrens 820fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 821fa9e4066Sahrens ASSERT(!zap->zap_ismicro); 82292241e0bSTom Erickson ASSERT(fzap_check(zn, integer_size, num_integers) == 0); 823fa9e4066Sahrens 824da6c28aaSamw err = zap_deref_leaf(zap, zn->zn_hash, tx, RW_WRITER, &l); 825ea8dc4b6Seschrock if (err != 0) 826ea8dc4b6Seschrock return (err); 827fa9e4066Sahrens retry: 828da6c28aaSamw err = zap_leaf_lookup(l, zn, &zeh); 829fa9e4066Sahrens if (err == 0) { 830be6fd75aSMatthew Ahrens err = SET_ERROR(EEXIST); 831fa9e4066Sahrens goto out; 832fa9e4066Sahrens } 833ea8dc4b6Seschrock if (err != ENOENT) 834ea8dc4b6Seschrock goto out; 835fa9e4066Sahrens 836b24ab676SJeff Bonwick err = zap_entry_create(l, zn, cd, 837fa9e4066Sahrens integer_size, num_integers, val, &zeh); 838fa9e4066Sahrens 839fa9e4066Sahrens if (err == 0) { 840fa9e4066Sahrens zap_increment_num_entries(zap, 1, tx); 841fa9e4066Sahrens } else if (err == EAGAIN) { 842ae972795SMatthew Ahrens err = zap_expand_leaf(zn, l, tag, tx, &l); 843ad860c82Sbonwick zap = zn->zn_zap; /* zap_expand_leaf() may change zap */ 84466328dd3Sahrens if (err == 0) 84566328dd3Sahrens goto retry; 846fa9e4066Sahrens } 847fa9e4066Sahrens 848fa9e4066Sahrens out: 849ad860c82Sbonwick if (zap != NULL) 850ae972795SMatthew Ahrens zap_put_leaf_maybe_grow_ptrtbl(zn, l, tag, tx); 851fa9e4066Sahrens return (err); 852fa9e4066Sahrens } 853fa9e4066Sahrens 854fa9e4066Sahrens int 855da6c28aaSamw fzap_add(zap_name_t *zn, 856fa9e4066Sahrens uint64_t integer_size, uint64_t num_integers, 857ae972795SMatthew Ahrens const void *val, void *tag, dmu_tx_t *tx) 858fa9e4066Sahrens { 85992241e0bSTom Erickson int err = fzap_check(zn, integer_size, num_integers); 860fa9e4066Sahrens if (err != 0) 861fa9e4066Sahrens return (err); 862fa9e4066Sahrens 863da6c28aaSamw return (fzap_add_cd(zn, integer_size, num_integers, 864ae972795SMatthew Ahrens val, ZAP_NEED_CD, tag, tx)); 865fa9e4066Sahrens } 866fa9e4066Sahrens 867fa9e4066Sahrens int 868da6c28aaSamw fzap_update(zap_name_t *zn, 869ae972795SMatthew Ahrens int integer_size, uint64_t num_integers, const void *val, 870ae972795SMatthew Ahrens void *tag, dmu_tx_t *tx) 871fa9e4066Sahrens { 872fa9e4066Sahrens zap_leaf_t *l; 873fa9e4066Sahrens int err, create; 874fa9e4066Sahrens zap_entry_handle_t zeh; 875da6c28aaSamw zap_t *zap = zn->zn_zap; 876fa9e4066Sahrens 877fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 87892241e0bSTom Erickson err = fzap_check(zn, integer_size, num_integers); 879fa9e4066Sahrens if (err != 0) 880fa9e4066Sahrens return (err); 881fa9e4066Sahrens 882da6c28aaSamw err = zap_deref_leaf(zap, zn->zn_hash, tx, RW_WRITER, &l); 883ea8dc4b6Seschrock if (err != 0) 884ea8dc4b6Seschrock return (err); 885fa9e4066Sahrens retry: 886da6c28aaSamw err = zap_leaf_lookup(l, zn, &zeh); 887fa9e4066Sahrens create = (err == ENOENT); 888fa9e4066Sahrens ASSERT(err == 0 || err == ENOENT); 889fa9e4066Sahrens 890fa9e4066Sahrens if (create) { 891b24ab676SJeff Bonwick err = zap_entry_create(l, zn, ZAP_NEED_CD, 892b24ab676SJeff Bonwick integer_size, num_integers, val, &zeh); 893fa9e4066Sahrens if (err == 0) 894fa9e4066Sahrens zap_increment_num_entries(zap, 1, tx); 895fa9e4066Sahrens } else { 896fa9e4066Sahrens err = zap_entry_update(&zeh, integer_size, num_integers, val); 897fa9e4066Sahrens } 898fa9e4066Sahrens 899fa9e4066Sahrens if (err == EAGAIN) { 900ae972795SMatthew Ahrens err = zap_expand_leaf(zn, l, tag, tx, &l); 901ad860c82Sbonwick zap = zn->zn_zap; /* zap_expand_leaf() may change zap */ 90266328dd3Sahrens if (err == 0) 90366328dd3Sahrens goto retry; 904fa9e4066Sahrens } 905fa9e4066Sahrens 906ad860c82Sbonwick if (zap != NULL) 907ae972795SMatthew Ahrens zap_put_leaf_maybe_grow_ptrtbl(zn, l, tag, tx); 908fa9e4066Sahrens return (err); 909fa9e4066Sahrens } 910fa9e4066Sahrens 911fa9e4066Sahrens int 912da6c28aaSamw fzap_length(zap_name_t *zn, 913fa9e4066Sahrens uint64_t *integer_size, uint64_t *num_integers) 914fa9e4066Sahrens { 915fa9e4066Sahrens zap_leaf_t *l; 916fa9e4066Sahrens int err; 917fa9e4066Sahrens zap_entry_handle_t zeh; 918fa9e4066Sahrens 919da6c28aaSamw err = zap_deref_leaf(zn->zn_zap, zn->zn_hash, NULL, RW_READER, &l); 920ea8dc4b6Seschrock if (err != 0) 921ea8dc4b6Seschrock return (err); 922da6c28aaSamw err = zap_leaf_lookup(l, zn, &zeh); 923fa9e4066Sahrens if (err != 0) 924fa9e4066Sahrens goto out; 925fa9e4066Sahrens 926fa9e4066Sahrens if (integer_size) 927fa9e4066Sahrens *integer_size = zeh.zeh_integer_size; 928fa9e4066Sahrens if (num_integers) 929fa9e4066Sahrens *num_integers = zeh.zeh_num_integers; 930fa9e4066Sahrens out: 931fa9e4066Sahrens zap_put_leaf(l); 932fa9e4066Sahrens return (err); 933fa9e4066Sahrens } 934fa9e4066Sahrens 935fa9e4066Sahrens int 936da6c28aaSamw fzap_remove(zap_name_t *zn, dmu_tx_t *tx) 937fa9e4066Sahrens { 938fa9e4066Sahrens zap_leaf_t *l; 939fa9e4066Sahrens int err; 940fa9e4066Sahrens zap_entry_handle_t zeh; 941fa9e4066Sahrens 942da6c28aaSamw err = zap_deref_leaf(zn->zn_zap, zn->zn_hash, tx, RW_WRITER, &l); 943ea8dc4b6Seschrock if (err != 0) 944ea8dc4b6Seschrock return (err); 945da6c28aaSamw err = zap_leaf_lookup(l, zn, &zeh); 946fa9e4066Sahrens if (err == 0) { 947fa9e4066Sahrens zap_entry_remove(&zeh); 948da6c28aaSamw zap_increment_num_entries(zn->zn_zap, -1, tx); 949fa9e4066Sahrens } 950fa9e4066Sahrens zap_put_leaf(l); 951fa9e4066Sahrens return (err); 952fa9e4066Sahrens } 953fa9e4066Sahrens 954c7cd2421SGeorge Wilson void 955c7cd2421SGeorge Wilson fzap_prefetch(zap_name_t *zn) 956c7cd2421SGeorge Wilson { 957c7cd2421SGeorge Wilson uint64_t idx, blk; 958c7cd2421SGeorge Wilson zap_t *zap = zn->zn_zap; 959c7cd2421SGeorge Wilson int bs; 960c7cd2421SGeorge Wilson 961c7cd2421SGeorge Wilson idx = ZAP_HASH_IDX(zn->zn_hash, 962c1379625SJustin T. Gibbs zap_f_phys(zap)->zap_ptrtbl.zt_shift); 963c7cd2421SGeorge Wilson if (zap_idx_to_blk(zap, idx, &blk) != 0) 964c7cd2421SGeorge Wilson return; 965c7cd2421SGeorge Wilson bs = FZAP_BLOCK_SHIFT(zap); 966a2cdcdd2SPaul Dagnelie dmu_prefetch(zap->zap_objset, zap->zap_object, 0, blk << bs, 1 << bs, 967a2cdcdd2SPaul Dagnelie ZIO_PRIORITY_SYNC_READ); 968c7cd2421SGeorge Wilson } 969c7cd2421SGeorge Wilson 970088f3894Sahrens /* 971088f3894Sahrens * Helper functions for consumers. 972088f3894Sahrens */ 973088f3894Sahrens 974ad135b5dSChristopher Siden uint64_t 975ad135b5dSChristopher Siden zap_create_link(objset_t *os, dmu_object_type_t ot, uint64_t parent_obj, 976ad135b5dSChristopher Siden const char *name, dmu_tx_t *tx) 977ad135b5dSChristopher Siden { 978ad135b5dSChristopher Siden uint64_t new_obj; 979ad135b5dSChristopher Siden 980ad135b5dSChristopher Siden VERIFY((new_obj = zap_create(os, ot, DMU_OT_NONE, 0, tx)) > 0); 981215198a6SJoe Stein VERIFY0(zap_add(os, parent_obj, name, sizeof (uint64_t), 1, &new_obj, 982215198a6SJoe Stein tx)); 983ad135b5dSChristopher Siden 984ad135b5dSChristopher Siden return (new_obj); 985ad135b5dSChristopher Siden } 986ad135b5dSChristopher Siden 987fa9e4066Sahrens int 988e7437265Sahrens zap_value_search(objset_t *os, uint64_t zapobj, uint64_t value, uint64_t mask, 989e7437265Sahrens char *name) 990fa9e4066Sahrens { 991fa9e4066Sahrens zap_cursor_t zc; 992fa9e4066Sahrens zap_attribute_t *za; 993fa9e4066Sahrens int err; 994fa9e4066Sahrens 995e7437265Sahrens if (mask == 0) 996e7437265Sahrens mask = -1ULL; 997e7437265Sahrens 998fa9e4066Sahrens za = kmem_alloc(sizeof (zap_attribute_t), KM_SLEEP); 999fa9e4066Sahrens for (zap_cursor_init(&zc, os, zapobj); 1000fa9e4066Sahrens (err = zap_cursor_retrieve(&zc, za)) == 0; 1001fa9e4066Sahrens zap_cursor_advance(&zc)) { 1002e7437265Sahrens if ((za->za_first_integer & mask) == (value & mask)) { 1003fa9e4066Sahrens (void) strcpy(name, za->za_name); 1004fa9e4066Sahrens break; 1005fa9e4066Sahrens } 1006fa9e4066Sahrens } 100787e5029aSahrens zap_cursor_fini(&zc); 1008fa9e4066Sahrens kmem_free(za, sizeof (zap_attribute_t)); 1009fa9e4066Sahrens return (err); 1010fa9e4066Sahrens } 1011fa9e4066Sahrens 1012088f3894Sahrens int 1013088f3894Sahrens zap_join(objset_t *os, uint64_t fromobj, uint64_t intoobj, dmu_tx_t *tx) 1014088f3894Sahrens { 1015088f3894Sahrens zap_cursor_t zc; 1016088f3894Sahrens zap_attribute_t za; 1017088f3894Sahrens int err; 1018088f3894Sahrens 1019b287be1bSWill Andrews err = 0; 1020088f3894Sahrens for (zap_cursor_init(&zc, os, fromobj); 1021088f3894Sahrens zap_cursor_retrieve(&zc, &za) == 0; 1022088f3894Sahrens (void) zap_cursor_advance(&zc)) { 1023b287be1bSWill Andrews if (za.za_integer_length != 8 || za.za_num_integers != 1) { 1024b287be1bSWill Andrews err = SET_ERROR(EINVAL); 1025b287be1bSWill Andrews break; 1026b287be1bSWill Andrews } 1027088f3894Sahrens err = zap_add(os, intoobj, za.za_name, 1028088f3894Sahrens 8, 1, &za.za_first_integer, tx); 1029088f3894Sahrens if (err) 1030b287be1bSWill Andrews break; 1031088f3894Sahrens } 1032088f3894Sahrens zap_cursor_fini(&zc); 1033b287be1bSWill Andrews return (err); 1034088f3894Sahrens } 1035088f3894Sahrens 10363f9d6ad7SLin Ling int 10373f9d6ad7SLin Ling zap_join_key(objset_t *os, uint64_t fromobj, uint64_t intoobj, 10383f9d6ad7SLin Ling uint64_t value, dmu_tx_t *tx) 10393f9d6ad7SLin Ling { 10403f9d6ad7SLin Ling zap_cursor_t zc; 10413f9d6ad7SLin Ling zap_attribute_t za; 10423f9d6ad7SLin Ling int err; 10433f9d6ad7SLin Ling 1044b287be1bSWill Andrews err = 0; 10453f9d6ad7SLin Ling for (zap_cursor_init(&zc, os, fromobj); 10463f9d6ad7SLin Ling zap_cursor_retrieve(&zc, &za) == 0; 10473f9d6ad7SLin Ling (void) zap_cursor_advance(&zc)) { 1048b287be1bSWill Andrews if (za.za_integer_length != 8 || za.za_num_integers != 1) { 1049b287be1bSWill Andrews err = SET_ERROR(EINVAL); 1050b287be1bSWill Andrews break; 1051b287be1bSWill Andrews } 10523f9d6ad7SLin Ling err = zap_add(os, intoobj, za.za_name, 10533f9d6ad7SLin Ling 8, 1, &value, tx); 10543f9d6ad7SLin Ling if (err) 1055b287be1bSWill Andrews break; 10563f9d6ad7SLin Ling } 10573f9d6ad7SLin Ling zap_cursor_fini(&zc); 1058b287be1bSWill Andrews return (err); 10593f9d6ad7SLin Ling } 10603f9d6ad7SLin Ling 10613f9d6ad7SLin Ling int 10623f9d6ad7SLin Ling zap_join_increment(objset_t *os, uint64_t fromobj, uint64_t intoobj, 10633f9d6ad7SLin Ling dmu_tx_t *tx) 10643f9d6ad7SLin Ling { 10653f9d6ad7SLin Ling zap_cursor_t zc; 10663f9d6ad7SLin Ling zap_attribute_t za; 10673f9d6ad7SLin Ling int err; 10683f9d6ad7SLin Ling 1069b287be1bSWill Andrews err = 0; 10703f9d6ad7SLin Ling for (zap_cursor_init(&zc, os, fromobj); 10713f9d6ad7SLin Ling zap_cursor_retrieve(&zc, &za) == 0; 10723f9d6ad7SLin Ling (void) zap_cursor_advance(&zc)) { 10733f9d6ad7SLin Ling uint64_t delta = 0; 10743f9d6ad7SLin Ling 1075b287be1bSWill Andrews if (za.za_integer_length != 8 || za.za_num_integers != 1) { 1076b287be1bSWill Andrews err = SET_ERROR(EINVAL); 1077b287be1bSWill Andrews break; 1078b287be1bSWill Andrews } 10793f9d6ad7SLin Ling 10803f9d6ad7SLin Ling err = zap_lookup(os, intoobj, za.za_name, 8, 1, &delta); 10813f9d6ad7SLin Ling if (err != 0 && err != ENOENT) 1082b287be1bSWill Andrews break; 10833f9d6ad7SLin Ling delta += za.za_first_integer; 10843f9d6ad7SLin Ling err = zap_update(os, intoobj, za.za_name, 8, 1, &delta, tx); 10853f9d6ad7SLin Ling if (err) 1086b287be1bSWill Andrews break; 10873f9d6ad7SLin Ling } 10883f9d6ad7SLin Ling zap_cursor_fini(&zc); 1089b287be1bSWill Andrews return (err); 10903f9d6ad7SLin Ling } 10913f9d6ad7SLin Ling 1092088f3894Sahrens int 1093088f3894Sahrens zap_add_int(objset_t *os, uint64_t obj, uint64_t value, dmu_tx_t *tx) 1094088f3894Sahrens { 1095088f3894Sahrens char name[20]; 1096088f3894Sahrens 1097088f3894Sahrens (void) snprintf(name, sizeof (name), "%llx", (longlong_t)value); 1098088f3894Sahrens return (zap_add(os, obj, name, 8, 1, &value, tx)); 1099088f3894Sahrens } 1100088f3894Sahrens 1101088f3894Sahrens int 1102088f3894Sahrens zap_remove_int(objset_t *os, uint64_t obj, uint64_t value, dmu_tx_t *tx) 1103088f3894Sahrens { 1104088f3894Sahrens char name[20]; 1105088f3894Sahrens 1106088f3894Sahrens (void) snprintf(name, sizeof (name), "%llx", (longlong_t)value); 1107088f3894Sahrens return (zap_remove(os, obj, name, tx)); 1108088f3894Sahrens } 1109088f3894Sahrens 1110088f3894Sahrens int 1111088f3894Sahrens zap_lookup_int(objset_t *os, uint64_t obj, uint64_t value) 1112088f3894Sahrens { 1113088f3894Sahrens char name[20]; 1114088f3894Sahrens 1115088f3894Sahrens (void) snprintf(name, sizeof (name), "%llx", (longlong_t)value); 1116088f3894Sahrens return (zap_lookup(os, obj, name, 8, 1, &value)); 1117088f3894Sahrens } 1118fa9e4066Sahrens 11199966ca11SMatthew Ahrens int 11203f9d6ad7SLin Ling zap_add_int_key(objset_t *os, uint64_t obj, 11213f9d6ad7SLin Ling uint64_t key, uint64_t value, dmu_tx_t *tx) 11223f9d6ad7SLin Ling { 11233f9d6ad7SLin Ling char name[20]; 11243f9d6ad7SLin Ling 11253f9d6ad7SLin Ling (void) snprintf(name, sizeof (name), "%llx", (longlong_t)key); 11263f9d6ad7SLin Ling return (zap_add(os, obj, name, 8, 1, &value, tx)); 11273f9d6ad7SLin Ling } 11283f9d6ad7SLin Ling 1129f1745736SMatthew Ahrens int 1130f1745736SMatthew Ahrens zap_update_int_key(objset_t *os, uint64_t obj, 1131f1745736SMatthew Ahrens uint64_t key, uint64_t value, dmu_tx_t *tx) 1132f1745736SMatthew Ahrens { 1133f1745736SMatthew Ahrens char name[20]; 1134f1745736SMatthew Ahrens 1135f1745736SMatthew Ahrens (void) snprintf(name, sizeof (name), "%llx", (longlong_t)key); 1136f1745736SMatthew Ahrens return (zap_update(os, obj, name, 8, 1, &value, tx)); 1137f1745736SMatthew Ahrens } 1138f1745736SMatthew Ahrens 11393f9d6ad7SLin Ling int 11403f9d6ad7SLin Ling zap_lookup_int_key(objset_t *os, uint64_t obj, uint64_t key, uint64_t *valuep) 11419966ca11SMatthew Ahrens { 11429966ca11SMatthew Ahrens char name[20]; 11433f9d6ad7SLin Ling 11443f9d6ad7SLin Ling (void) snprintf(name, sizeof (name), "%llx", (longlong_t)key); 11453f9d6ad7SLin Ling return (zap_lookup(os, obj, name, 8, 1, valuep)); 11463f9d6ad7SLin Ling } 11473f9d6ad7SLin Ling 11483f9d6ad7SLin Ling int 11493f9d6ad7SLin Ling zap_increment(objset_t *os, uint64_t obj, const char *name, int64_t delta, 11503f9d6ad7SLin Ling dmu_tx_t *tx) 11513f9d6ad7SLin Ling { 11529966ca11SMatthew Ahrens uint64_t value = 0; 11539966ca11SMatthew Ahrens int err; 11549966ca11SMatthew Ahrens 11559966ca11SMatthew Ahrens if (delta == 0) 11569966ca11SMatthew Ahrens return (0); 11579966ca11SMatthew Ahrens 11589966ca11SMatthew Ahrens err = zap_lookup(os, obj, name, 8, 1, &value); 11599966ca11SMatthew Ahrens if (err != 0 && err != ENOENT) 11609966ca11SMatthew Ahrens return (err); 11619966ca11SMatthew Ahrens value += delta; 11629966ca11SMatthew Ahrens if (value == 0) 11639966ca11SMatthew Ahrens err = zap_remove(os, obj, name, tx); 11649966ca11SMatthew Ahrens else 11659966ca11SMatthew Ahrens err = zap_update(os, obj, name, 8, 1, &value, tx); 11669966ca11SMatthew Ahrens return (err); 11679966ca11SMatthew Ahrens } 11689966ca11SMatthew Ahrens 11693f9d6ad7SLin Ling int 11703f9d6ad7SLin Ling zap_increment_int(objset_t *os, uint64_t obj, uint64_t key, int64_t delta, 11713f9d6ad7SLin Ling dmu_tx_t *tx) 11723f9d6ad7SLin Ling { 11733f9d6ad7SLin Ling char name[20]; 11743f9d6ad7SLin Ling 11753f9d6ad7SLin Ling (void) snprintf(name, sizeof (name), "%llx", (longlong_t)key); 11763f9d6ad7SLin Ling return (zap_increment(os, obj, name, delta, tx)); 11773f9d6ad7SLin Ling } 11789966ca11SMatthew Ahrens 1179fa9e4066Sahrens /* 1180fa9e4066Sahrens * Routines for iterating over the attributes. 1181fa9e4066Sahrens */ 1182fa9e4066Sahrens 1183fa9e4066Sahrens int 1184fa9e4066Sahrens fzap_cursor_retrieve(zap_t *zap, zap_cursor_t *zc, zap_attribute_t *za) 1185fa9e4066Sahrens { 1186fa9e4066Sahrens int err = ENOENT; 1187fa9e4066Sahrens zap_entry_handle_t zeh; 1188fa9e4066Sahrens zap_leaf_t *l; 1189fa9e4066Sahrens 1190fa9e4066Sahrens /* retrieve the next entry at or after zc_hash/zc_cd */ 1191fa9e4066Sahrens /* if no entry, return ENOENT */ 1192fa9e4066Sahrens 119387e5029aSahrens if (zc->zc_leaf && 119466328dd3Sahrens (ZAP_HASH_IDX(zc->zc_hash, 1195c1379625SJustin T. Gibbs zap_leaf_phys(zc->zc_leaf)->l_hdr.lh_prefix_len) != 1196c1379625SJustin T. Gibbs zap_leaf_phys(zc->zc_leaf)->l_hdr.lh_prefix)) { 119787e5029aSahrens rw_enter(&zc->zc_leaf->l_rwlock, RW_READER); 119887e5029aSahrens zap_put_leaf(zc->zc_leaf); 119987e5029aSahrens zc->zc_leaf = NULL; 120087e5029aSahrens } 120187e5029aSahrens 1202fa9e4066Sahrens again: 120387e5029aSahrens if (zc->zc_leaf == NULL) { 1204ea8dc4b6Seschrock err = zap_deref_leaf(zap, zc->zc_hash, NULL, RW_READER, 1205ea8dc4b6Seschrock &zc->zc_leaf); 1206ea8dc4b6Seschrock if (err != 0) 1207ea8dc4b6Seschrock return (err); 120887e5029aSahrens } else { 120987e5029aSahrens rw_enter(&zc->zc_leaf->l_rwlock, RW_READER); 121087e5029aSahrens } 121187e5029aSahrens l = zc->zc_leaf; 121287e5029aSahrens 1213fa9e4066Sahrens err = zap_leaf_lookup_closest(l, zc->zc_hash, zc->zc_cd, &zeh); 1214fa9e4066Sahrens 1215fa9e4066Sahrens if (err == ENOENT) { 121666328dd3Sahrens uint64_t nocare = 1217c1379625SJustin T. Gibbs (1ULL << (64 - zap_leaf_phys(l)->l_hdr.lh_prefix_len)) - 1; 1218fa9e4066Sahrens zc->zc_hash = (zc->zc_hash & ~nocare) + nocare + 1; 1219fa9e4066Sahrens zc->zc_cd = 0; 1220c1379625SJustin T. Gibbs if (zap_leaf_phys(l)->l_hdr.lh_prefix_len == 0 || 1221c1379625SJustin T. Gibbs zc->zc_hash == 0) { 1222fa9e4066Sahrens zc->zc_hash = -1ULL; 1223fa9e4066Sahrens } else { 122487e5029aSahrens zap_put_leaf(zc->zc_leaf); 122587e5029aSahrens zc->zc_leaf = NULL; 1226fa9e4066Sahrens goto again; 1227fa9e4066Sahrens } 1228fa9e4066Sahrens } 1229fa9e4066Sahrens 1230fa9e4066Sahrens if (err == 0) { 1231fa9e4066Sahrens zc->zc_hash = zeh.zeh_hash; 1232fa9e4066Sahrens zc->zc_cd = zeh.zeh_cd; 1233fa9e4066Sahrens za->za_integer_length = zeh.zeh_integer_size; 1234fa9e4066Sahrens za->za_num_integers = zeh.zeh_num_integers; 1235fa9e4066Sahrens if (zeh.zeh_num_integers == 0) { 1236fa9e4066Sahrens za->za_first_integer = 0; 1237fa9e4066Sahrens } else { 1238fa9e4066Sahrens err = zap_entry_read(&zeh, 8, 1, &za->za_first_integer); 1239fa9e4066Sahrens ASSERT(err == 0 || err == EOVERFLOW); 1240fa9e4066Sahrens } 1241b24ab676SJeff Bonwick err = zap_entry_read_name(zap, &zeh, 1242fa9e4066Sahrens sizeof (za->za_name), za->za_name); 1243fa9e4066Sahrens ASSERT(err == 0); 1244da6c28aaSamw 1245da6c28aaSamw za->za_normalization_conflict = 1246da6c28aaSamw zap_entry_normalization_conflict(&zeh, 1247da6c28aaSamw NULL, za->za_name, zap); 1248fa9e4066Sahrens } 124987e5029aSahrens rw_exit(&zc->zc_leaf->l_rwlock); 1250fa9e4066Sahrens return (err); 1251fa9e4066Sahrens } 1252fa9e4066Sahrens 1253fa9e4066Sahrens static void 1254fa9e4066Sahrens zap_stats_ptrtbl(zap_t *zap, uint64_t *tbl, int len, zap_stats_t *zs) 1255fa9e4066Sahrens { 1256ea8dc4b6Seschrock int i, err; 1257fa9e4066Sahrens uint64_t lastblk = 0; 1258fa9e4066Sahrens 1259fa9e4066Sahrens /* 1260fa9e4066Sahrens * NB: if a leaf has more pointers than an entire ptrtbl block 1261fa9e4066Sahrens * can hold, then it'll be accounted for more than once, since 1262fa9e4066Sahrens * we won't have lastblk. 1263fa9e4066Sahrens */ 1264fa9e4066Sahrens for (i = 0; i < len; i++) { 1265fa9e4066Sahrens zap_leaf_t *l; 1266fa9e4066Sahrens 1267fa9e4066Sahrens if (tbl[i] == lastblk) 1268fa9e4066Sahrens continue; 1269fa9e4066Sahrens lastblk = tbl[i]; 1270fa9e4066Sahrens 1271ea8dc4b6Seschrock err = zap_get_leaf_byblk(zap, tbl[i], NULL, RW_READER, &l); 1272ea8dc4b6Seschrock if (err == 0) { 127366328dd3Sahrens zap_leaf_stats(zap, l, zs); 1274ea8dc4b6Seschrock zap_put_leaf(l); 1275ea8dc4b6Seschrock } 1276fa9e4066Sahrens } 1277fa9e4066Sahrens } 1278fa9e4066Sahrens 1279fa9e4066Sahrens void 1280fa9e4066Sahrens fzap_get_stats(zap_t *zap, zap_stats_t *zs) 1281fa9e4066Sahrens { 1282f65e61c0Sahrens int bs = FZAP_BLOCK_SHIFT(zap); 1283f65e61c0Sahrens zs->zs_blocksize = 1ULL << bs; 12848248818dSnd 12858248818dSnd /* 12868248818dSnd * Set zap_phys_t fields 12878248818dSnd */ 1288c1379625SJustin T. Gibbs zs->zs_num_leafs = zap_f_phys(zap)->zap_num_leafs; 1289c1379625SJustin T. Gibbs zs->zs_num_entries = zap_f_phys(zap)->zap_num_entries; 1290c1379625SJustin T. Gibbs zs->zs_num_blocks = zap_f_phys(zap)->zap_freeblk; 1291c1379625SJustin T. Gibbs zs->zs_block_type = zap_f_phys(zap)->zap_block_type; 1292c1379625SJustin T. Gibbs zs->zs_magic = zap_f_phys(zap)->zap_magic; 1293c1379625SJustin T. Gibbs zs->zs_salt = zap_f_phys(zap)->zap_salt; 12948248818dSnd 12958248818dSnd /* 12968248818dSnd * Set zap_ptrtbl fields 12978248818dSnd */ 1298c1379625SJustin T. Gibbs zs->zs_ptrtbl_len = 1ULL << zap_f_phys(zap)->zap_ptrtbl.zt_shift; 1299c1379625SJustin T. Gibbs zs->zs_ptrtbl_nextblk = zap_f_phys(zap)->zap_ptrtbl.zt_nextblk; 13008248818dSnd zs->zs_ptrtbl_blks_copied = 1301c1379625SJustin T. Gibbs zap_f_phys(zap)->zap_ptrtbl.zt_blks_copied; 1302c1379625SJustin T. Gibbs zs->zs_ptrtbl_zt_blk = zap_f_phys(zap)->zap_ptrtbl.zt_blk; 1303c1379625SJustin T. Gibbs zs->zs_ptrtbl_zt_numblks = zap_f_phys(zap)->zap_ptrtbl.zt_numblks; 1304c1379625SJustin T. Gibbs zs->zs_ptrtbl_zt_shift = zap_f_phys(zap)->zap_ptrtbl.zt_shift; 1305fa9e4066Sahrens 1306c1379625SJustin T. Gibbs if (zap_f_phys(zap)->zap_ptrtbl.zt_numblks == 0) { 1307fa9e4066Sahrens /* the ptrtbl is entirely in the header block. */ 1308f65e61c0Sahrens zap_stats_ptrtbl(zap, &ZAP_EMBEDDED_PTRTBL_ENT(zap, 0), 1309f65e61c0Sahrens 1 << ZAP_EMBEDDED_PTRTBL_SHIFT(zap), zs); 1310fa9e4066Sahrens } else { 1311fa9e4066Sahrens int b; 1312fa9e4066Sahrens 1313a2cdcdd2SPaul Dagnelie dmu_prefetch(zap->zap_objset, zap->zap_object, 0, 1314c1379625SJustin T. Gibbs zap_f_phys(zap)->zap_ptrtbl.zt_blk << bs, 1315a2cdcdd2SPaul Dagnelie zap_f_phys(zap)->zap_ptrtbl.zt_numblks << bs, 1316a2cdcdd2SPaul Dagnelie ZIO_PRIORITY_SYNC_READ); 1317fa9e4066Sahrens 1318c1379625SJustin T. Gibbs for (b = 0; b < zap_f_phys(zap)->zap_ptrtbl.zt_numblks; 1319fa9e4066Sahrens b++) { 1320fa9e4066Sahrens dmu_buf_t *db; 1321ea8dc4b6Seschrock int err; 1322ea8dc4b6Seschrock 1323ea8dc4b6Seschrock err = dmu_buf_hold(zap->zap_objset, zap->zap_object, 1324c1379625SJustin T. Gibbs (zap_f_phys(zap)->zap_ptrtbl.zt_blk + b) << bs, 132547cb52daSJeff Bonwick FTAG, &db, DMU_READ_NO_PREFETCH); 1326ea8dc4b6Seschrock if (err == 0) { 1327ea8dc4b6Seschrock zap_stats_ptrtbl(zap, db->db_data, 1328ea8dc4b6Seschrock 1<<(bs-3), zs); 1329ea8dc4b6Seschrock dmu_buf_rele(db, FTAG); 1330ea8dc4b6Seschrock } 1331fa9e4066Sahrens } 1332fa9e4066Sahrens } 1333fa9e4066Sahrens } 13343d692628SSanjeev Bagewadi 13353d692628SSanjeev Bagewadi int 13360c779ad4SMatthew Ahrens fzap_count_write(zap_name_t *zn, int add, refcount_t *towrite, 13370c779ad4SMatthew Ahrens refcount_t *tooverwrite) 13383d692628SSanjeev Bagewadi { 13393d692628SSanjeev Bagewadi zap_t *zap = zn->zn_zap; 13403d692628SSanjeev Bagewadi zap_leaf_t *l; 13413d692628SSanjeev Bagewadi int err; 13423d692628SSanjeev Bagewadi 13433d692628SSanjeev Bagewadi /* 13443d692628SSanjeev Bagewadi * Account for the header block of the fatzap. 13453d692628SSanjeev Bagewadi */ 13463d692628SSanjeev Bagewadi if (!add && dmu_buf_freeable(zap->zap_dbuf)) { 13470c779ad4SMatthew Ahrens (void) refcount_add_many(tooverwrite, 13480c779ad4SMatthew Ahrens zap->zap_dbuf->db_size, FTAG); 13493d692628SSanjeev Bagewadi } else { 13500c779ad4SMatthew Ahrens (void) refcount_add_many(towrite, 13510c779ad4SMatthew Ahrens zap->zap_dbuf->db_size, FTAG); 13523d692628SSanjeev Bagewadi } 13533d692628SSanjeev Bagewadi 13543d692628SSanjeev Bagewadi /* 13553d692628SSanjeev Bagewadi * Account for the pointer table blocks. 13563d692628SSanjeev Bagewadi * If we are adding we need to account for the following cases : 13573d692628SSanjeev Bagewadi * - If the pointer table is embedded, this operation could force an 13583d692628SSanjeev Bagewadi * external pointer table. 13593d692628SSanjeev Bagewadi * - If this already has an external pointer table this operation 13603d692628SSanjeev Bagewadi * could extend the table. 13613d692628SSanjeev Bagewadi */ 13623d692628SSanjeev Bagewadi if (add) { 13630c779ad4SMatthew Ahrens if (zap_f_phys(zap)->zap_ptrtbl.zt_blk == 0) { 13640c779ad4SMatthew Ahrens (void) refcount_add_many(towrite, 13650c779ad4SMatthew Ahrens zap->zap_dbuf->db_size, FTAG); 13660c779ad4SMatthew Ahrens } else { 13670c779ad4SMatthew Ahrens (void) refcount_add_many(towrite, 13680c779ad4SMatthew Ahrens zap->zap_dbuf->db_size * 3, FTAG); 13690c779ad4SMatthew Ahrens } 13703d692628SSanjeev Bagewadi } 13713d692628SSanjeev Bagewadi 13723d692628SSanjeev Bagewadi /* 13733d692628SSanjeev Bagewadi * Now, check if the block containing leaf is freeable 13743d692628SSanjeev Bagewadi * and account accordingly. 13753d692628SSanjeev Bagewadi */ 13763d692628SSanjeev Bagewadi err = zap_deref_leaf(zap, zn->zn_hash, NULL, RW_READER, &l); 13773d692628SSanjeev Bagewadi if (err != 0) { 13783d692628SSanjeev Bagewadi return (err); 13793d692628SSanjeev Bagewadi } 13803d692628SSanjeev Bagewadi 13813d692628SSanjeev Bagewadi if (!add && dmu_buf_freeable(l->l_dbuf)) { 13820c779ad4SMatthew Ahrens (void) refcount_add_many(tooverwrite, l->l_dbuf->db_size, FTAG); 13833d692628SSanjeev Bagewadi } else { 13843d692628SSanjeev Bagewadi /* 13853d692628SSanjeev Bagewadi * If this an add operation, the leaf block could split. 13863d692628SSanjeev Bagewadi * Hence, we need to account for an additional leaf block. 13873d692628SSanjeev Bagewadi */ 13880c779ad4SMatthew Ahrens (void) refcount_add_many(towrite, 13890c779ad4SMatthew Ahrens (add ? 2 : 1) * l->l_dbuf->db_size, FTAG); 13903d692628SSanjeev Bagewadi } 13913d692628SSanjeev Bagewadi 13923d692628SSanjeev Bagewadi zap_put_leaf(l); 13933d692628SSanjeev Bagewadi return (0); 13943d692628SSanjeev Bagewadi } 1395