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. 23*ae972795SMatthew 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; 273f65e61c0Sahrens int bs = FZAP_BLOCK_SHIFT(zap); 274fa9e4066Sahrens 275fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 276fa9e4066Sahrens 277f65e61c0Sahrens blk = idx >> (bs-3); 278f65e61c0Sahrens off = idx & ((1<<(bs-3))-1); 279fa9e4066Sahrens 280ea8dc4b6Seschrock err = dmu_buf_hold(zap->zap_objset, zap->zap_object, 28147cb52daSJeff Bonwick (tbl->zt_blk + blk) << bs, FTAG, &db, DMU_READ_NO_PREFETCH); 282ea8dc4b6Seschrock if (err) 283ea8dc4b6Seschrock return (err); 284ea8dc4b6Seschrock *valp = ((uint64_t *)db->db_data)[off]; 285ea8dc4b6Seschrock dmu_buf_rele(db, FTAG); 286ea8dc4b6Seschrock 287ea8dc4b6Seschrock if (tbl->zt_nextblk != 0) { 288ea8dc4b6Seschrock /* 289ea8dc4b6Seschrock * read the nextblk for the sake of i/o error checking, 290ea8dc4b6Seschrock * so that zap_table_load() will catch errors for 291ea8dc4b6Seschrock * zap_table_store. 292ea8dc4b6Seschrock */ 293ea8dc4b6Seschrock blk = (idx*2) >> (bs-3); 294ea8dc4b6Seschrock 295ea8dc4b6Seschrock err = dmu_buf_hold(zap->zap_objset, zap->zap_object, 29647cb52daSJeff Bonwick (tbl->zt_nextblk + blk) << bs, FTAG, &db, 29747cb52daSJeff Bonwick DMU_READ_NO_PREFETCH); 298b287be1bSWill Andrews if (err == 0) 299b287be1bSWill Andrews dmu_buf_rele(db, FTAG); 300ea8dc4b6Seschrock } 301ea8dc4b6Seschrock return (err); 302fa9e4066Sahrens } 303fa9e4066Sahrens 304fa9e4066Sahrens /* 305fa9e4066Sahrens * Routines for growing the ptrtbl. 306fa9e4066Sahrens */ 307fa9e4066Sahrens 308fa9e4066Sahrens static void 309fa9e4066Sahrens zap_ptrtbl_transfer(const uint64_t *src, uint64_t *dst, int n) 310fa9e4066Sahrens { 311fa9e4066Sahrens int i; 312fa9e4066Sahrens for (i = 0; i < n; i++) { 313fa9e4066Sahrens uint64_t lb = src[i]; 314fa9e4066Sahrens dst[2*i+0] = lb; 315fa9e4066Sahrens dst[2*i+1] = lb; 316fa9e4066Sahrens } 317fa9e4066Sahrens } 318fa9e4066Sahrens 31966328dd3Sahrens static int 320fa9e4066Sahrens zap_grow_ptrtbl(zap_t *zap, dmu_tx_t *tx) 321fa9e4066Sahrens { 322b24ab676SJeff Bonwick /* 323b24ab676SJeff Bonwick * The pointer table should never use more hash bits than we 324b24ab676SJeff Bonwick * have (otherwise we'd be using useless zero bits to index it). 325b24ab676SJeff Bonwick * If we are within 2 bits of running out, stop growing, since 326b24ab676SJeff Bonwick * this is already an aberrant condition. 327b24ab676SJeff Bonwick */ 328c1379625SJustin T. Gibbs if (zap_f_phys(zap)->zap_ptrtbl.zt_shift >= zap_hashbits(zap) - 2) 329be6fd75aSMatthew Ahrens return (SET_ERROR(ENOSPC)); 330fa9e4066Sahrens 331c1379625SJustin T. Gibbs if (zap_f_phys(zap)->zap_ptrtbl.zt_numblks == 0) { 332fa9e4066Sahrens /* 333f65e61c0Sahrens * We are outgrowing the "embedded" ptrtbl (the one 334f65e61c0Sahrens * stored in the header block). Give it its own entire 335f65e61c0Sahrens * block, which will double the size of the ptrtbl. 336fa9e4066Sahrens */ 337fa9e4066Sahrens uint64_t newblk; 338fa9e4066Sahrens dmu_buf_t *db_new; 339ea8dc4b6Seschrock int err; 340fa9e4066Sahrens 341c1379625SJustin T. Gibbs ASSERT3U(zap_f_phys(zap)->zap_ptrtbl.zt_shift, ==, 342f65e61c0Sahrens ZAP_EMBEDDED_PTRTBL_SHIFT(zap)); 343c1379625SJustin T. Gibbs ASSERT0(zap_f_phys(zap)->zap_ptrtbl.zt_blk); 344fa9e4066Sahrens 34566328dd3Sahrens newblk = zap_allocate_blocks(zap, 1); 346ea8dc4b6Seschrock err = dmu_buf_hold(zap->zap_objset, zap->zap_object, 34747cb52daSJeff Bonwick newblk << FZAP_BLOCK_SHIFT(zap), FTAG, &db_new, 34847cb52daSJeff Bonwick DMU_READ_NO_PREFETCH); 349ea8dc4b6Seschrock if (err) 35066328dd3Sahrens return (err); 351fa9e4066Sahrens dmu_buf_will_dirty(db_new, tx); 352f65e61c0Sahrens zap_ptrtbl_transfer(&ZAP_EMBEDDED_PTRTBL_ENT(zap, 0), 353f65e61c0Sahrens db_new->db_data, 1 << ZAP_EMBEDDED_PTRTBL_SHIFT(zap)); 354ea8dc4b6Seschrock dmu_buf_rele(db_new, FTAG); 355fa9e4066Sahrens 356c1379625SJustin T. Gibbs zap_f_phys(zap)->zap_ptrtbl.zt_blk = newblk; 357c1379625SJustin T. Gibbs zap_f_phys(zap)->zap_ptrtbl.zt_numblks = 1; 358c1379625SJustin T. Gibbs zap_f_phys(zap)->zap_ptrtbl.zt_shift++; 359fa9e4066Sahrens 360c1379625SJustin T. Gibbs ASSERT3U(1ULL << zap_f_phys(zap)->zap_ptrtbl.zt_shift, ==, 361c1379625SJustin T. Gibbs zap_f_phys(zap)->zap_ptrtbl.zt_numblks << 362f65e61c0Sahrens (FZAP_BLOCK_SHIFT(zap)-3)); 36366328dd3Sahrens 36466328dd3Sahrens return (0); 365fa9e4066Sahrens } else { 366c1379625SJustin T. Gibbs return (zap_table_grow(zap, &zap_f_phys(zap)->zap_ptrtbl, 36766328dd3Sahrens zap_ptrtbl_transfer, tx)); 368fa9e4066Sahrens } 369fa9e4066Sahrens } 370fa9e4066Sahrens 371fa9e4066Sahrens static void 372fa9e4066Sahrens zap_increment_num_entries(zap_t *zap, int delta, dmu_tx_t *tx) 373fa9e4066Sahrens { 374fa9e4066Sahrens dmu_buf_will_dirty(zap->zap_dbuf, tx); 375fa9e4066Sahrens mutex_enter(&zap->zap_f.zap_num_entries_mtx); 376c1379625SJustin T. Gibbs ASSERT(delta > 0 || zap_f_phys(zap)->zap_num_entries >= -delta); 377c1379625SJustin T. Gibbs zap_f_phys(zap)->zap_num_entries += delta; 378fa9e4066Sahrens mutex_exit(&zap->zap_f.zap_num_entries_mtx); 379fa9e4066Sahrens } 380fa9e4066Sahrens 38166328dd3Sahrens static uint64_t 38266328dd3Sahrens zap_allocate_blocks(zap_t *zap, int nblocks) 383fa9e4066Sahrens { 384fa9e4066Sahrens uint64_t newblk; 38566328dd3Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 386c1379625SJustin T. Gibbs newblk = zap_f_phys(zap)->zap_freeblk; 387c1379625SJustin T. Gibbs zap_f_phys(zap)->zap_freeblk += nblocks; 388fa9e4066Sahrens return (newblk); 389fa9e4066Sahrens } 390fa9e4066Sahrens 391bc9014e6SJustin Gibbs static void 392bc9014e6SJustin Gibbs zap_leaf_pageout(void *dbu) 393bc9014e6SJustin Gibbs { 394bc9014e6SJustin Gibbs zap_leaf_t *l = dbu; 395bc9014e6SJustin Gibbs 396bc9014e6SJustin Gibbs rw_destroy(&l->l_rwlock); 397bc9014e6SJustin Gibbs kmem_free(l, sizeof (zap_leaf_t)); 398bc9014e6SJustin Gibbs } 399bc9014e6SJustin Gibbs 40066328dd3Sahrens static zap_leaf_t * 401fa9e4066Sahrens zap_create_leaf(zap_t *zap, dmu_tx_t *tx) 402fa9e4066Sahrens { 403fa9e4066Sahrens void *winner; 404bc9014e6SJustin Gibbs zap_leaf_t *l = kmem_zalloc(sizeof (zap_leaf_t), KM_SLEEP); 405fa9e4066Sahrens 406fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 407fa9e4066Sahrens 408fa9e4066Sahrens rw_init(&l->l_rwlock, 0, 0, 0); 409fa9e4066Sahrens rw_enter(&l->l_rwlock, RW_WRITER); 41066328dd3Sahrens l->l_blkid = zap_allocate_blocks(zap, 1); 411fa9e4066Sahrens l->l_dbuf = NULL; 412fa9e4066Sahrens 413ea8dc4b6Seschrock VERIFY(0 == dmu_buf_hold(zap->zap_objset, zap->zap_object, 41447cb52daSJeff Bonwick l->l_blkid << FZAP_BLOCK_SHIFT(zap), NULL, &l->l_dbuf, 41547cb52daSJeff Bonwick DMU_READ_NO_PREFETCH)); 416bc9014e6SJustin Gibbs dmu_buf_init_user(&l->l_dbu, zap_leaf_pageout, &l->l_dbuf); 417bc9014e6SJustin Gibbs winner = dmu_buf_set_user(l->l_dbuf, &l->l_dbu); 418fa9e4066Sahrens ASSERT(winner == NULL); 419fa9e4066Sahrens dmu_buf_will_dirty(l->l_dbuf, tx); 420fa9e4066Sahrens 421de8267e0Stimh zap_leaf_init(l, zap->zap_normflags != 0); 422fa9e4066Sahrens 423c1379625SJustin T. Gibbs zap_f_phys(zap)->zap_num_leafs++; 424fa9e4066Sahrens 42566328dd3Sahrens return (l); 426fa9e4066Sahrens } 427fa9e4066Sahrens 428fa9e4066Sahrens int 429fa9e4066Sahrens fzap_count(zap_t *zap, uint64_t *count) 430fa9e4066Sahrens { 431fa9e4066Sahrens ASSERT(!zap->zap_ismicro); 432fa9e4066Sahrens mutex_enter(&zap->zap_f.zap_num_entries_mtx); /* unnecessary */ 433c1379625SJustin T. Gibbs *count = zap_f_phys(zap)->zap_num_entries; 434fa9e4066Sahrens mutex_exit(&zap->zap_f.zap_num_entries_mtx); 435fa9e4066Sahrens return (0); 436fa9e4066Sahrens } 437fa9e4066Sahrens 438fa9e4066Sahrens /* 439fa9e4066Sahrens * Routines for obtaining zap_leaf_t's 440fa9e4066Sahrens */ 441fa9e4066Sahrens 44287e5029aSahrens void 443fa9e4066Sahrens zap_put_leaf(zap_leaf_t *l) 444fa9e4066Sahrens { 445fa9e4066Sahrens rw_exit(&l->l_rwlock); 446ea8dc4b6Seschrock dmu_buf_rele(l->l_dbuf, NULL); 447fa9e4066Sahrens } 448fa9e4066Sahrens 449fa9e4066Sahrens static zap_leaf_t * 450fa9e4066Sahrens zap_open_leaf(uint64_t blkid, dmu_buf_t *db) 451fa9e4066Sahrens { 452fa9e4066Sahrens zap_leaf_t *l, *winner; 453fa9e4066Sahrens 454fa9e4066Sahrens ASSERT(blkid != 0); 455fa9e4066Sahrens 456bc9014e6SJustin Gibbs l = kmem_zalloc(sizeof (zap_leaf_t), KM_SLEEP); 457fa9e4066Sahrens rw_init(&l->l_rwlock, 0, 0, 0); 458fa9e4066Sahrens rw_enter(&l->l_rwlock, RW_WRITER); 459fa9e4066Sahrens l->l_blkid = blkid; 460bf16b11eSMatthew Ahrens l->l_bs = highbit64(db->db_size) - 1; 461fa9e4066Sahrens l->l_dbuf = db; 462fa9e4066Sahrens 463bc9014e6SJustin Gibbs dmu_buf_init_user(&l->l_dbu, zap_leaf_pageout, &l->l_dbuf); 464bc9014e6SJustin Gibbs winner = dmu_buf_set_user(db, &l->l_dbu); 465fa9e4066Sahrens 466fa9e4066Sahrens rw_exit(&l->l_rwlock); 467fa9e4066Sahrens if (winner != NULL) { 468fa9e4066Sahrens /* someone else set it first */ 469bc9014e6SJustin Gibbs zap_leaf_pageout(&l->l_dbu); 470fa9e4066Sahrens l = winner; 471fa9e4066Sahrens } 472fa9e4066Sahrens 47366328dd3Sahrens /* 47466328dd3Sahrens * lhr_pad was previously used for the next leaf in the leaf 47566328dd3Sahrens * chain. There should be no chained leafs (as we have removed 47666328dd3Sahrens * support for them). 47766328dd3Sahrens */ 478c1379625SJustin T. Gibbs ASSERT0(zap_leaf_phys(l)->l_hdr.lh_pad1); 47966328dd3Sahrens 480f65e61c0Sahrens /* 481f65e61c0Sahrens * There should be more hash entries than there can be 482f65e61c0Sahrens * chunks to put in the hash table 483f65e61c0Sahrens */ 484f65e61c0Sahrens ASSERT3U(ZAP_LEAF_HASH_NUMENTRIES(l), >, ZAP_LEAF_NUMCHUNKS(l) / 3); 485f65e61c0Sahrens 486f65e61c0Sahrens /* The chunks should begin at the end of the hash table */ 487f65e61c0Sahrens ASSERT3P(&ZAP_LEAF_CHUNK(l, 0), ==, 488c1379625SJustin T. Gibbs &zap_leaf_phys(l)->l_hash[ZAP_LEAF_HASH_NUMENTRIES(l)]); 489f65e61c0Sahrens 490f65e61c0Sahrens /* The chunks should end at the end of the block */ 491f65e61c0Sahrens ASSERT3U((uintptr_t)&ZAP_LEAF_CHUNK(l, ZAP_LEAF_NUMCHUNKS(l)) - 492c1379625SJustin T. Gibbs (uintptr_t)zap_leaf_phys(l), ==, l->l_dbuf->db_size); 493f65e61c0Sahrens 494fa9e4066Sahrens return (l); 495fa9e4066Sahrens } 496fa9e4066Sahrens 497ea8dc4b6Seschrock static int 49866328dd3Sahrens zap_get_leaf_byblk(zap_t *zap, uint64_t blkid, dmu_tx_t *tx, krw_t lt, 499ea8dc4b6Seschrock zap_leaf_t **lp) 500fa9e4066Sahrens { 501fa9e4066Sahrens dmu_buf_t *db; 502fa9e4066Sahrens zap_leaf_t *l; 503f65e61c0Sahrens int bs = FZAP_BLOCK_SHIFT(zap); 504ea8dc4b6Seschrock int err; 505fa9e4066Sahrens 506fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 507fa9e4066Sahrens 508ea8dc4b6Seschrock err = dmu_buf_hold(zap->zap_objset, zap->zap_object, 50947cb52daSJeff Bonwick blkid << bs, NULL, &db, DMU_READ_NO_PREFETCH); 510ea8dc4b6Seschrock if (err) 511ea8dc4b6Seschrock return (err); 512fa9e4066Sahrens 513fa9e4066Sahrens ASSERT3U(db->db_object, ==, zap->zap_object); 514f65e61c0Sahrens ASSERT3U(db->db_offset, ==, blkid << bs); 515f65e61c0Sahrens ASSERT3U(db->db_size, ==, 1 << bs); 516fa9e4066Sahrens ASSERT(blkid != 0); 517fa9e4066Sahrens 518fa9e4066Sahrens l = dmu_buf_get_user(db); 519fa9e4066Sahrens 520fa9e4066Sahrens if (l == NULL) 521fa9e4066Sahrens l = zap_open_leaf(blkid, db); 522fa9e4066Sahrens 523fa9e4066Sahrens rw_enter(&l->l_rwlock, lt); 524fa9e4066Sahrens /* 525c1379625SJustin T. Gibbs * Must lock before dirtying, otherwise zap_leaf_phys(l) could change, 526fa9e4066Sahrens * causing ASSERT below to fail. 527fa9e4066Sahrens */ 528fa9e4066Sahrens if (lt == RW_WRITER) 529fa9e4066Sahrens dmu_buf_will_dirty(db, tx); 530fa9e4066Sahrens ASSERT3U(l->l_blkid, ==, blkid); 531fa9e4066Sahrens ASSERT3P(l->l_dbuf, ==, db); 532c1379625SJustin T. Gibbs ASSERT3U(zap_leaf_phys(l)->l_hdr.lh_block_type, ==, ZBT_LEAF); 533c1379625SJustin T. Gibbs ASSERT3U(zap_leaf_phys(l)->l_hdr.lh_magic, ==, ZAP_LEAF_MAGIC); 534fa9e4066Sahrens 535ea8dc4b6Seschrock *lp = l; 536ea8dc4b6Seschrock return (0); 537fa9e4066Sahrens } 538fa9e4066Sahrens 539ea8dc4b6Seschrock static int 540ea8dc4b6Seschrock zap_idx_to_blk(zap_t *zap, uint64_t idx, uint64_t *valp) 541fa9e4066Sahrens { 542fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 543fa9e4066Sahrens 544c1379625SJustin T. Gibbs if (zap_f_phys(zap)->zap_ptrtbl.zt_numblks == 0) { 545fa9e4066Sahrens ASSERT3U(idx, <, 546c1379625SJustin T. Gibbs (1ULL << zap_f_phys(zap)->zap_ptrtbl.zt_shift)); 547ea8dc4b6Seschrock *valp = ZAP_EMBEDDED_PTRTBL_ENT(zap, idx); 548ea8dc4b6Seschrock return (0); 549fa9e4066Sahrens } else { 550c1379625SJustin T. Gibbs return (zap_table_load(zap, &zap_f_phys(zap)->zap_ptrtbl, 551ea8dc4b6Seschrock idx, valp)); 552fa9e4066Sahrens } 553fa9e4066Sahrens } 554fa9e4066Sahrens 555ea8dc4b6Seschrock static int 556fa9e4066Sahrens zap_set_idx_to_blk(zap_t *zap, uint64_t idx, uint64_t blk, dmu_tx_t *tx) 557fa9e4066Sahrens { 558fa9e4066Sahrens ASSERT(tx != NULL); 559fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 560fa9e4066Sahrens 561c1379625SJustin T. Gibbs if (zap_f_phys(zap)->zap_ptrtbl.zt_blk == 0) { 562f65e61c0Sahrens ZAP_EMBEDDED_PTRTBL_ENT(zap, idx) = blk; 563ea8dc4b6Seschrock return (0); 564fa9e4066Sahrens } else { 565c1379625SJustin T. Gibbs return (zap_table_store(zap, &zap_f_phys(zap)->zap_ptrtbl, 566ea8dc4b6Seschrock idx, blk, tx)); 567fa9e4066Sahrens } 568fa9e4066Sahrens } 569fa9e4066Sahrens 570ea8dc4b6Seschrock static int 571ea8dc4b6Seschrock zap_deref_leaf(zap_t *zap, uint64_t h, dmu_tx_t *tx, krw_t lt, zap_leaf_t **lp) 572fa9e4066Sahrens { 573ea8dc4b6Seschrock uint64_t idx, blk; 574ea8dc4b6Seschrock int err; 575fa9e4066Sahrens 576fa9e4066Sahrens ASSERT(zap->zap_dbuf == NULL || 577c1379625SJustin T. Gibbs zap_f_phys(zap) == zap->zap_dbuf->db_data); 57802525cd0SChunwei Chen 57902525cd0SChunwei Chen /* Reality check for corrupt zap objects (leaf or header). */ 58002525cd0SChunwei Chen if ((zap_f_phys(zap)->zap_block_type != ZBT_LEAF && 58102525cd0SChunwei Chen zap_f_phys(zap)->zap_block_type != ZBT_HEADER) || 58202525cd0SChunwei Chen zap_f_phys(zap)->zap_magic != ZAP_MAGIC) { 58302525cd0SChunwei Chen return (SET_ERROR(EIO)); 58402525cd0SChunwei Chen } 58502525cd0SChunwei Chen 586c1379625SJustin T. Gibbs idx = ZAP_HASH_IDX(h, zap_f_phys(zap)->zap_ptrtbl.zt_shift); 587ea8dc4b6Seschrock err = zap_idx_to_blk(zap, idx, &blk); 588ea8dc4b6Seschrock if (err != 0) 589ea8dc4b6Seschrock return (err); 590ea8dc4b6Seschrock err = zap_get_leaf_byblk(zap, blk, tx, lt, lp); 591fa9e4066Sahrens 592c1379625SJustin T. Gibbs ASSERT(err || 593c1379625SJustin T. Gibbs ZAP_HASH_IDX(h, zap_leaf_phys(*lp)->l_hdr.lh_prefix_len) == 594c1379625SJustin T. Gibbs zap_leaf_phys(*lp)->l_hdr.lh_prefix); 595ea8dc4b6Seschrock return (err); 596fa9e4066Sahrens } 597fa9e4066Sahrens 598ea8dc4b6Seschrock static int 599*ae972795SMatthew Ahrens zap_expand_leaf(zap_name_t *zn, zap_leaf_t *l, 600*ae972795SMatthew Ahrens void *tag, dmu_tx_t *tx, zap_leaf_t **lp) 601fa9e4066Sahrens { 602ad860c82Sbonwick zap_t *zap = zn->zn_zap; 603ad860c82Sbonwick uint64_t hash = zn->zn_hash; 604fa9e4066Sahrens zap_leaf_t *nl; 605fa9e4066Sahrens int prefix_diff, i, err; 606fa9e4066Sahrens uint64_t sibling; 607c1379625SJustin T. Gibbs int old_prefix_len = zap_leaf_phys(l)->l_hdr.lh_prefix_len; 608fa9e4066Sahrens 609c1379625SJustin T. Gibbs ASSERT3U(old_prefix_len, <=, zap_f_phys(zap)->zap_ptrtbl.zt_shift); 610fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 611fa9e4066Sahrens 61266328dd3Sahrens ASSERT3U(ZAP_HASH_IDX(hash, old_prefix_len), ==, 613c1379625SJustin T. Gibbs zap_leaf_phys(l)->l_hdr.lh_prefix); 614fa9e4066Sahrens 61566328dd3Sahrens if (zap_tryupgradedir(zap, tx) == 0 || 616c1379625SJustin T. Gibbs old_prefix_len == zap_f_phys(zap)->zap_ptrtbl.zt_shift) { 61766328dd3Sahrens /* We failed to upgrade, or need to grow the pointer table */ 618fa9e4066Sahrens objset_t *os = zap->zap_objset; 619fa9e4066Sahrens uint64_t object = zap->zap_object; 620fa9e4066Sahrens 621fa9e4066Sahrens zap_put_leaf(l); 622*ae972795SMatthew Ahrens zap_unlockdir(zap, tag); 623c5f9e431Sahrens err = zap_lockdir(os, object, tx, RW_WRITER, 624*ae972795SMatthew Ahrens FALSE, FALSE, tag, &zn->zn_zap); 625ad860c82Sbonwick zap = zn->zn_zap; 62666328dd3Sahrens if (err) 62766328dd3Sahrens return (err); 628fa9e4066Sahrens ASSERT(!zap->zap_ismicro); 629fa9e4066Sahrens 63066328dd3Sahrens while (old_prefix_len == 631c1379625SJustin T. Gibbs zap_f_phys(zap)->zap_ptrtbl.zt_shift) { 63266328dd3Sahrens err = zap_grow_ptrtbl(zap, tx); 63366328dd3Sahrens if (err) 63466328dd3Sahrens return (err); 63566328dd3Sahrens } 63666328dd3Sahrens 63766328dd3Sahrens err = zap_deref_leaf(zap, hash, tx, RW_WRITER, &l); 63866328dd3Sahrens if (err) 63966328dd3Sahrens return (err); 64066328dd3Sahrens 641c1379625SJustin T. Gibbs if (zap_leaf_phys(l)->l_hdr.lh_prefix_len != old_prefix_len) { 642fa9e4066Sahrens /* it split while our locks were down */ 643ea8dc4b6Seschrock *lp = l; 644ea8dc4b6Seschrock return (0); 645ea8dc4b6Seschrock } 646fa9e4066Sahrens } 647fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 648c1379625SJustin T. Gibbs ASSERT3U(old_prefix_len, <, zap_f_phys(zap)->zap_ptrtbl.zt_shift); 64966328dd3Sahrens ASSERT3U(ZAP_HASH_IDX(hash, old_prefix_len), ==, 650c1379625SJustin T. Gibbs zap_leaf_phys(l)->l_hdr.lh_prefix); 651fa9e4066Sahrens 652c1379625SJustin T. Gibbs prefix_diff = zap_f_phys(zap)->zap_ptrtbl.zt_shift - 65366328dd3Sahrens (old_prefix_len + 1); 65466328dd3Sahrens sibling = (ZAP_HASH_IDX(hash, old_prefix_len + 1) | 1) << prefix_diff; 655ea8dc4b6Seschrock 656ea8dc4b6Seschrock /* check for i/o errors before doing zap_leaf_split */ 657fa9e4066Sahrens for (i = 0; i < (1ULL<<prefix_diff); i++) { 658ea8dc4b6Seschrock uint64_t blk; 659ea8dc4b6Seschrock err = zap_idx_to_blk(zap, sibling+i, &blk); 660ea8dc4b6Seschrock if (err) 661ea8dc4b6Seschrock return (err); 662ea8dc4b6Seschrock ASSERT3U(blk, ==, l->l_blkid); 663ea8dc4b6Seschrock } 664ea8dc4b6Seschrock 66566328dd3Sahrens nl = zap_create_leaf(zap, tx); 666de8267e0Stimh zap_leaf_split(l, nl, zap->zap_normflags != 0); 667ea8dc4b6Seschrock 66866328dd3Sahrens /* set sibling pointers */ 669fb09f5aaSMadhav Suresh for (i = 0; i < (1ULL << prefix_diff); i++) { 670ea8dc4b6Seschrock err = zap_set_idx_to_blk(zap, sibling+i, nl->l_blkid, tx); 671fb09f5aaSMadhav Suresh ASSERT0(err); /* we checked for i/o errors above */ 672fa9e4066Sahrens } 673fa9e4066Sahrens 674c1379625SJustin T. Gibbs if (hash & (1ULL << (64 - zap_leaf_phys(l)->l_hdr.lh_prefix_len))) { 675fa9e4066Sahrens /* we want the sibling */ 676fa9e4066Sahrens zap_put_leaf(l); 67766328dd3Sahrens *lp = nl; 678fa9e4066Sahrens } else { 679fa9e4066Sahrens zap_put_leaf(nl); 68066328dd3Sahrens *lp = l; 681fa9e4066Sahrens } 682fa9e4066Sahrens 683ea8dc4b6Seschrock return (0); 684fa9e4066Sahrens } 685fa9e4066Sahrens 686fa9e4066Sahrens static void 687*ae972795SMatthew Ahrens zap_put_leaf_maybe_grow_ptrtbl(zap_name_t *zn, zap_leaf_t *l, 688*ae972795SMatthew Ahrens void *tag, dmu_tx_t *tx) 689fa9e4066Sahrens { 690ad860c82Sbonwick zap_t *zap = zn->zn_zap; 691c1379625SJustin T. Gibbs int shift = zap_f_phys(zap)->zap_ptrtbl.zt_shift; 692c1379625SJustin T. Gibbs int leaffull = (zap_leaf_phys(l)->l_hdr.lh_prefix_len == shift && 693c1379625SJustin T. Gibbs zap_leaf_phys(l)->l_hdr.lh_nfree < ZAP_LEAF_LOW_WATER); 694fa9e4066Sahrens 69566328dd3Sahrens zap_put_leaf(l); 696fa9e4066Sahrens 697c1379625SJustin T. Gibbs if (leaffull || zap_f_phys(zap)->zap_ptrtbl.zt_nextblk) { 69866328dd3Sahrens int err; 699fa9e4066Sahrens 70066328dd3Sahrens /* 70166328dd3Sahrens * We are in the middle of growing the pointer table, or 70266328dd3Sahrens * this leaf will soon make us grow it. 70366328dd3Sahrens */ 704fa9e4066Sahrens if (zap_tryupgradedir(zap, tx) == 0) { 705fa9e4066Sahrens objset_t *os = zap->zap_objset; 706fa9e4066Sahrens uint64_t zapobj = zap->zap_object; 707fa9e4066Sahrens 708*ae972795SMatthew Ahrens zap_unlockdir(zap, tag); 709fa9e4066Sahrens err = zap_lockdir(os, zapobj, tx, 710*ae972795SMatthew Ahrens RW_WRITER, FALSE, FALSE, tag, &zn->zn_zap); 711ad860c82Sbonwick zap = zn->zn_zap; 71266328dd3Sahrens if (err) 71366328dd3Sahrens return; 714fa9e4066Sahrens } 715fa9e4066Sahrens 71666328dd3Sahrens /* could have finished growing while our locks were down */ 717c1379625SJustin T. Gibbs if (zap_f_phys(zap)->zap_ptrtbl.zt_shift == shift) 71866328dd3Sahrens (void) zap_grow_ptrtbl(zap, tx); 719fa9e4066Sahrens } 720fa9e4066Sahrens } 721fa9e4066Sahrens 722fa9e4066Sahrens static int 72392241e0bSTom Erickson fzap_checkname(zap_name_t *zn) 724fa9e4066Sahrens { 725486ae710SMatthew Ahrens if (zn->zn_key_orig_numints * zn->zn_key_intlen > ZAP_MAXNAMELEN) 726be6fd75aSMatthew Ahrens return (SET_ERROR(ENAMETOOLONG)); 72792241e0bSTom Erickson return (0); 72892241e0bSTom Erickson } 72966328dd3Sahrens 73092241e0bSTom Erickson static int 73192241e0bSTom Erickson fzap_checksize(uint64_t integer_size, uint64_t num_integers) 73292241e0bSTom Erickson { 733fa9e4066Sahrens /* Only integer sizes supported by C */ 734fa9e4066Sahrens switch (integer_size) { 735fa9e4066Sahrens case 1: 736fa9e4066Sahrens case 2: 737fa9e4066Sahrens case 4: 738fa9e4066Sahrens case 8: 739fa9e4066Sahrens break; 740fa9e4066Sahrens default: 741be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL)); 742fa9e4066Sahrens } 743fa9e4066Sahrens 74466328dd3Sahrens if (integer_size * num_integers > ZAP_MAXVALUELEN) 74566328dd3Sahrens return (E2BIG); 746fa9e4066Sahrens 747fa9e4066Sahrens return (0); 748fa9e4066Sahrens } 749fa9e4066Sahrens 75092241e0bSTom Erickson static int 75192241e0bSTom Erickson fzap_check(zap_name_t *zn, uint64_t integer_size, uint64_t num_integers) 75292241e0bSTom Erickson { 75392241e0bSTom Erickson int err; 75492241e0bSTom Erickson 75592241e0bSTom Erickson if ((err = fzap_checkname(zn)) != 0) 75692241e0bSTom Erickson return (err); 75792241e0bSTom Erickson return (fzap_checksize(integer_size, num_integers)); 75892241e0bSTom Erickson } 75992241e0bSTom Erickson 760fa9e4066Sahrens /* 761da6c28aaSamw * Routines for manipulating attributes. 762fa9e4066Sahrens */ 763fa9e4066Sahrens int 764da6c28aaSamw fzap_lookup(zap_name_t *zn, 765da6c28aaSamw uint64_t integer_size, uint64_t num_integers, void *buf, 766da6c28aaSamw char *realname, int rn_len, boolean_t *ncp) 767fa9e4066Sahrens { 768fa9e4066Sahrens zap_leaf_t *l; 769fa9e4066Sahrens int err; 770fa9e4066Sahrens zap_entry_handle_t zeh; 771fa9e4066Sahrens 77292241e0bSTom Erickson if ((err = fzap_checkname(zn)) != 0) 773fa9e4066Sahrens return (err); 774fa9e4066Sahrens 775da6c28aaSamw err = zap_deref_leaf(zn->zn_zap, zn->zn_hash, NULL, RW_READER, &l); 776ea8dc4b6Seschrock if (err != 0) 777ea8dc4b6Seschrock return (err); 778da6c28aaSamw err = zap_leaf_lookup(l, zn, &zeh); 779da6c28aaSamw if (err == 0) { 78092241e0bSTom Erickson if ((err = fzap_checksize(integer_size, num_integers)) != 0) { 78192241e0bSTom Erickson zap_put_leaf(l); 78292241e0bSTom Erickson return (err); 78392241e0bSTom Erickson } 78492241e0bSTom Erickson 78566328dd3Sahrens err = zap_entry_read(&zeh, integer_size, num_integers, buf); 786b24ab676SJeff Bonwick (void) zap_entry_read_name(zn->zn_zap, &zeh, rn_len, realname); 787da6c28aaSamw if (ncp) { 788da6c28aaSamw *ncp = zap_entry_normalization_conflict(&zeh, 789da6c28aaSamw zn, NULL, zn->zn_zap); 790da6c28aaSamw } 791da6c28aaSamw } 79266328dd3Sahrens 793fa9e4066Sahrens zap_put_leaf(l); 794fa9e4066Sahrens return (err); 795fa9e4066Sahrens } 796fa9e4066Sahrens 797fa9e4066Sahrens int 798da6c28aaSamw fzap_add_cd(zap_name_t *zn, 799fa9e4066Sahrens uint64_t integer_size, uint64_t num_integers, 800*ae972795SMatthew Ahrens const void *val, uint32_t cd, void *tag, dmu_tx_t *tx) 801fa9e4066Sahrens { 802fa9e4066Sahrens zap_leaf_t *l; 803fa9e4066Sahrens int err; 804fa9e4066Sahrens zap_entry_handle_t zeh; 805da6c28aaSamw zap_t *zap = zn->zn_zap; 806fa9e4066Sahrens 807fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 808fa9e4066Sahrens ASSERT(!zap->zap_ismicro); 80992241e0bSTom Erickson ASSERT(fzap_check(zn, integer_size, num_integers) == 0); 810fa9e4066Sahrens 811da6c28aaSamw err = zap_deref_leaf(zap, zn->zn_hash, tx, RW_WRITER, &l); 812ea8dc4b6Seschrock if (err != 0) 813ea8dc4b6Seschrock return (err); 814fa9e4066Sahrens retry: 815da6c28aaSamw err = zap_leaf_lookup(l, zn, &zeh); 816fa9e4066Sahrens if (err == 0) { 817be6fd75aSMatthew Ahrens err = SET_ERROR(EEXIST); 818fa9e4066Sahrens goto out; 819fa9e4066Sahrens } 820ea8dc4b6Seschrock if (err != ENOENT) 821ea8dc4b6Seschrock goto out; 822fa9e4066Sahrens 823b24ab676SJeff Bonwick err = zap_entry_create(l, zn, cd, 824fa9e4066Sahrens integer_size, num_integers, val, &zeh); 825fa9e4066Sahrens 826fa9e4066Sahrens if (err == 0) { 827fa9e4066Sahrens zap_increment_num_entries(zap, 1, tx); 828fa9e4066Sahrens } else if (err == EAGAIN) { 829*ae972795SMatthew Ahrens err = zap_expand_leaf(zn, l, tag, tx, &l); 830ad860c82Sbonwick zap = zn->zn_zap; /* zap_expand_leaf() may change zap */ 83166328dd3Sahrens if (err == 0) 83266328dd3Sahrens goto retry; 833fa9e4066Sahrens } 834fa9e4066Sahrens 835fa9e4066Sahrens out: 836ad860c82Sbonwick if (zap != NULL) 837*ae972795SMatthew Ahrens zap_put_leaf_maybe_grow_ptrtbl(zn, l, tag, tx); 838fa9e4066Sahrens return (err); 839fa9e4066Sahrens } 840fa9e4066Sahrens 841fa9e4066Sahrens int 842da6c28aaSamw fzap_add(zap_name_t *zn, 843fa9e4066Sahrens uint64_t integer_size, uint64_t num_integers, 844*ae972795SMatthew Ahrens const void *val, void *tag, dmu_tx_t *tx) 845fa9e4066Sahrens { 84692241e0bSTom Erickson int err = fzap_check(zn, integer_size, num_integers); 847fa9e4066Sahrens if (err != 0) 848fa9e4066Sahrens return (err); 849fa9e4066Sahrens 850da6c28aaSamw return (fzap_add_cd(zn, integer_size, num_integers, 851*ae972795SMatthew Ahrens val, ZAP_NEED_CD, tag, tx)); 852fa9e4066Sahrens } 853fa9e4066Sahrens 854fa9e4066Sahrens int 855da6c28aaSamw fzap_update(zap_name_t *zn, 856*ae972795SMatthew Ahrens int integer_size, uint64_t num_integers, const void *val, 857*ae972795SMatthew Ahrens void *tag, dmu_tx_t *tx) 858fa9e4066Sahrens { 859fa9e4066Sahrens zap_leaf_t *l; 860fa9e4066Sahrens int err, create; 861fa9e4066Sahrens zap_entry_handle_t zeh; 862da6c28aaSamw zap_t *zap = zn->zn_zap; 863fa9e4066Sahrens 864fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 86592241e0bSTom Erickson err = fzap_check(zn, integer_size, num_integers); 866fa9e4066Sahrens if (err != 0) 867fa9e4066Sahrens return (err); 868fa9e4066Sahrens 869da6c28aaSamw err = zap_deref_leaf(zap, zn->zn_hash, tx, RW_WRITER, &l); 870ea8dc4b6Seschrock if (err != 0) 871ea8dc4b6Seschrock return (err); 872fa9e4066Sahrens retry: 873da6c28aaSamw err = zap_leaf_lookup(l, zn, &zeh); 874fa9e4066Sahrens create = (err == ENOENT); 875fa9e4066Sahrens ASSERT(err == 0 || err == ENOENT); 876fa9e4066Sahrens 877fa9e4066Sahrens if (create) { 878b24ab676SJeff Bonwick err = zap_entry_create(l, zn, ZAP_NEED_CD, 879b24ab676SJeff Bonwick integer_size, num_integers, val, &zeh); 880fa9e4066Sahrens if (err == 0) 881fa9e4066Sahrens zap_increment_num_entries(zap, 1, tx); 882fa9e4066Sahrens } else { 883fa9e4066Sahrens err = zap_entry_update(&zeh, integer_size, num_integers, val); 884fa9e4066Sahrens } 885fa9e4066Sahrens 886fa9e4066Sahrens if (err == EAGAIN) { 887*ae972795SMatthew Ahrens err = zap_expand_leaf(zn, l, tag, tx, &l); 888ad860c82Sbonwick zap = zn->zn_zap; /* zap_expand_leaf() may change zap */ 88966328dd3Sahrens if (err == 0) 89066328dd3Sahrens goto retry; 891fa9e4066Sahrens } 892fa9e4066Sahrens 893ad860c82Sbonwick if (zap != NULL) 894*ae972795SMatthew Ahrens zap_put_leaf_maybe_grow_ptrtbl(zn, l, tag, tx); 895fa9e4066Sahrens return (err); 896fa9e4066Sahrens } 897fa9e4066Sahrens 898fa9e4066Sahrens int 899da6c28aaSamw fzap_length(zap_name_t *zn, 900fa9e4066Sahrens uint64_t *integer_size, uint64_t *num_integers) 901fa9e4066Sahrens { 902fa9e4066Sahrens zap_leaf_t *l; 903fa9e4066Sahrens int err; 904fa9e4066Sahrens zap_entry_handle_t zeh; 905fa9e4066Sahrens 906da6c28aaSamw err = zap_deref_leaf(zn->zn_zap, zn->zn_hash, NULL, RW_READER, &l); 907ea8dc4b6Seschrock if (err != 0) 908ea8dc4b6Seschrock return (err); 909da6c28aaSamw err = zap_leaf_lookup(l, zn, &zeh); 910fa9e4066Sahrens if (err != 0) 911fa9e4066Sahrens goto out; 912fa9e4066Sahrens 913fa9e4066Sahrens if (integer_size) 914fa9e4066Sahrens *integer_size = zeh.zeh_integer_size; 915fa9e4066Sahrens if (num_integers) 916fa9e4066Sahrens *num_integers = zeh.zeh_num_integers; 917fa9e4066Sahrens out: 918fa9e4066Sahrens zap_put_leaf(l); 919fa9e4066Sahrens return (err); 920fa9e4066Sahrens } 921fa9e4066Sahrens 922fa9e4066Sahrens int 923da6c28aaSamw fzap_remove(zap_name_t *zn, dmu_tx_t *tx) 924fa9e4066Sahrens { 925fa9e4066Sahrens zap_leaf_t *l; 926fa9e4066Sahrens int err; 927fa9e4066Sahrens zap_entry_handle_t zeh; 928fa9e4066Sahrens 929da6c28aaSamw err = zap_deref_leaf(zn->zn_zap, zn->zn_hash, tx, RW_WRITER, &l); 930ea8dc4b6Seschrock if (err != 0) 931ea8dc4b6Seschrock return (err); 932da6c28aaSamw err = zap_leaf_lookup(l, zn, &zeh); 933fa9e4066Sahrens if (err == 0) { 934fa9e4066Sahrens zap_entry_remove(&zeh); 935da6c28aaSamw zap_increment_num_entries(zn->zn_zap, -1, tx); 936fa9e4066Sahrens } 937fa9e4066Sahrens zap_put_leaf(l); 938fa9e4066Sahrens return (err); 939fa9e4066Sahrens } 940fa9e4066Sahrens 941c7cd2421SGeorge Wilson void 942c7cd2421SGeorge Wilson fzap_prefetch(zap_name_t *zn) 943c7cd2421SGeorge Wilson { 944c7cd2421SGeorge Wilson uint64_t idx, blk; 945c7cd2421SGeorge Wilson zap_t *zap = zn->zn_zap; 946c7cd2421SGeorge Wilson int bs; 947c7cd2421SGeorge Wilson 948c7cd2421SGeorge Wilson idx = ZAP_HASH_IDX(zn->zn_hash, 949c1379625SJustin T. Gibbs zap_f_phys(zap)->zap_ptrtbl.zt_shift); 950c7cd2421SGeorge Wilson if (zap_idx_to_blk(zap, idx, &blk) != 0) 951c7cd2421SGeorge Wilson return; 952c7cd2421SGeorge Wilson bs = FZAP_BLOCK_SHIFT(zap); 953a2cdcdd2SPaul Dagnelie dmu_prefetch(zap->zap_objset, zap->zap_object, 0, blk << bs, 1 << bs, 954a2cdcdd2SPaul Dagnelie ZIO_PRIORITY_SYNC_READ); 955c7cd2421SGeorge Wilson } 956c7cd2421SGeorge Wilson 957088f3894Sahrens /* 958088f3894Sahrens * Helper functions for consumers. 959088f3894Sahrens */ 960088f3894Sahrens 961ad135b5dSChristopher Siden uint64_t 962ad135b5dSChristopher Siden zap_create_link(objset_t *os, dmu_object_type_t ot, uint64_t parent_obj, 963ad135b5dSChristopher Siden const char *name, dmu_tx_t *tx) 964ad135b5dSChristopher Siden { 965ad135b5dSChristopher Siden uint64_t new_obj; 966ad135b5dSChristopher Siden 967ad135b5dSChristopher Siden VERIFY((new_obj = zap_create(os, ot, DMU_OT_NONE, 0, tx)) > 0); 968215198a6SJoe Stein VERIFY0(zap_add(os, parent_obj, name, sizeof (uint64_t), 1, &new_obj, 969215198a6SJoe Stein tx)); 970ad135b5dSChristopher Siden 971ad135b5dSChristopher Siden return (new_obj); 972ad135b5dSChristopher Siden } 973ad135b5dSChristopher Siden 974fa9e4066Sahrens int 975e7437265Sahrens zap_value_search(objset_t *os, uint64_t zapobj, uint64_t value, uint64_t mask, 976e7437265Sahrens char *name) 977fa9e4066Sahrens { 978fa9e4066Sahrens zap_cursor_t zc; 979fa9e4066Sahrens zap_attribute_t *za; 980fa9e4066Sahrens int err; 981fa9e4066Sahrens 982e7437265Sahrens if (mask == 0) 983e7437265Sahrens mask = -1ULL; 984e7437265Sahrens 985fa9e4066Sahrens za = kmem_alloc(sizeof (zap_attribute_t), KM_SLEEP); 986fa9e4066Sahrens for (zap_cursor_init(&zc, os, zapobj); 987fa9e4066Sahrens (err = zap_cursor_retrieve(&zc, za)) == 0; 988fa9e4066Sahrens zap_cursor_advance(&zc)) { 989e7437265Sahrens if ((za->za_first_integer & mask) == (value & mask)) { 990fa9e4066Sahrens (void) strcpy(name, za->za_name); 991fa9e4066Sahrens break; 992fa9e4066Sahrens } 993fa9e4066Sahrens } 99487e5029aSahrens zap_cursor_fini(&zc); 995fa9e4066Sahrens kmem_free(za, sizeof (zap_attribute_t)); 996fa9e4066Sahrens return (err); 997fa9e4066Sahrens } 998fa9e4066Sahrens 999088f3894Sahrens int 1000088f3894Sahrens zap_join(objset_t *os, uint64_t fromobj, uint64_t intoobj, dmu_tx_t *tx) 1001088f3894Sahrens { 1002088f3894Sahrens zap_cursor_t zc; 1003088f3894Sahrens zap_attribute_t za; 1004088f3894Sahrens int err; 1005088f3894Sahrens 1006b287be1bSWill Andrews err = 0; 1007088f3894Sahrens for (zap_cursor_init(&zc, os, fromobj); 1008088f3894Sahrens zap_cursor_retrieve(&zc, &za) == 0; 1009088f3894Sahrens (void) zap_cursor_advance(&zc)) { 1010b287be1bSWill Andrews if (za.za_integer_length != 8 || za.za_num_integers != 1) { 1011b287be1bSWill Andrews err = SET_ERROR(EINVAL); 1012b287be1bSWill Andrews break; 1013b287be1bSWill Andrews } 1014088f3894Sahrens err = zap_add(os, intoobj, za.za_name, 1015088f3894Sahrens 8, 1, &za.za_first_integer, tx); 1016088f3894Sahrens if (err) 1017b287be1bSWill Andrews break; 1018088f3894Sahrens } 1019088f3894Sahrens zap_cursor_fini(&zc); 1020b287be1bSWill Andrews return (err); 1021088f3894Sahrens } 1022088f3894Sahrens 10233f9d6ad7SLin Ling int 10243f9d6ad7SLin Ling zap_join_key(objset_t *os, uint64_t fromobj, uint64_t intoobj, 10253f9d6ad7SLin Ling uint64_t value, dmu_tx_t *tx) 10263f9d6ad7SLin Ling { 10273f9d6ad7SLin Ling zap_cursor_t zc; 10283f9d6ad7SLin Ling zap_attribute_t za; 10293f9d6ad7SLin Ling int err; 10303f9d6ad7SLin Ling 1031b287be1bSWill Andrews err = 0; 10323f9d6ad7SLin Ling for (zap_cursor_init(&zc, os, fromobj); 10333f9d6ad7SLin Ling zap_cursor_retrieve(&zc, &za) == 0; 10343f9d6ad7SLin Ling (void) zap_cursor_advance(&zc)) { 1035b287be1bSWill Andrews if (za.za_integer_length != 8 || za.za_num_integers != 1) { 1036b287be1bSWill Andrews err = SET_ERROR(EINVAL); 1037b287be1bSWill Andrews break; 1038b287be1bSWill Andrews } 10393f9d6ad7SLin Ling err = zap_add(os, intoobj, za.za_name, 10403f9d6ad7SLin Ling 8, 1, &value, tx); 10413f9d6ad7SLin Ling if (err) 1042b287be1bSWill Andrews break; 10433f9d6ad7SLin Ling } 10443f9d6ad7SLin Ling zap_cursor_fini(&zc); 1045b287be1bSWill Andrews return (err); 10463f9d6ad7SLin Ling } 10473f9d6ad7SLin Ling 10483f9d6ad7SLin Ling int 10493f9d6ad7SLin Ling zap_join_increment(objset_t *os, uint64_t fromobj, uint64_t intoobj, 10503f9d6ad7SLin Ling dmu_tx_t *tx) 10513f9d6ad7SLin Ling { 10523f9d6ad7SLin Ling zap_cursor_t zc; 10533f9d6ad7SLin Ling zap_attribute_t za; 10543f9d6ad7SLin Ling int err; 10553f9d6ad7SLin Ling 1056b287be1bSWill Andrews err = 0; 10573f9d6ad7SLin Ling for (zap_cursor_init(&zc, os, fromobj); 10583f9d6ad7SLin Ling zap_cursor_retrieve(&zc, &za) == 0; 10593f9d6ad7SLin Ling (void) zap_cursor_advance(&zc)) { 10603f9d6ad7SLin Ling uint64_t delta = 0; 10613f9d6ad7SLin Ling 1062b287be1bSWill Andrews if (za.za_integer_length != 8 || za.za_num_integers != 1) { 1063b287be1bSWill Andrews err = SET_ERROR(EINVAL); 1064b287be1bSWill Andrews break; 1065b287be1bSWill Andrews } 10663f9d6ad7SLin Ling 10673f9d6ad7SLin Ling err = zap_lookup(os, intoobj, za.za_name, 8, 1, &delta); 10683f9d6ad7SLin Ling if (err != 0 && err != ENOENT) 1069b287be1bSWill Andrews break; 10703f9d6ad7SLin Ling delta += za.za_first_integer; 10713f9d6ad7SLin Ling err = zap_update(os, intoobj, za.za_name, 8, 1, &delta, tx); 10723f9d6ad7SLin Ling if (err) 1073b287be1bSWill Andrews break; 10743f9d6ad7SLin Ling } 10753f9d6ad7SLin Ling zap_cursor_fini(&zc); 1076b287be1bSWill Andrews return (err); 10773f9d6ad7SLin Ling } 10783f9d6ad7SLin Ling 1079088f3894Sahrens int 1080088f3894Sahrens zap_add_int(objset_t *os, uint64_t obj, uint64_t value, dmu_tx_t *tx) 1081088f3894Sahrens { 1082088f3894Sahrens char name[20]; 1083088f3894Sahrens 1084088f3894Sahrens (void) snprintf(name, sizeof (name), "%llx", (longlong_t)value); 1085088f3894Sahrens return (zap_add(os, obj, name, 8, 1, &value, tx)); 1086088f3894Sahrens } 1087088f3894Sahrens 1088088f3894Sahrens int 1089088f3894Sahrens zap_remove_int(objset_t *os, uint64_t obj, uint64_t value, dmu_tx_t *tx) 1090088f3894Sahrens { 1091088f3894Sahrens char name[20]; 1092088f3894Sahrens 1093088f3894Sahrens (void) snprintf(name, sizeof (name), "%llx", (longlong_t)value); 1094088f3894Sahrens return (zap_remove(os, obj, name, tx)); 1095088f3894Sahrens } 1096088f3894Sahrens 1097088f3894Sahrens int 1098088f3894Sahrens zap_lookup_int(objset_t *os, uint64_t obj, uint64_t value) 1099088f3894Sahrens { 1100088f3894Sahrens char name[20]; 1101088f3894Sahrens 1102088f3894Sahrens (void) snprintf(name, sizeof (name), "%llx", (longlong_t)value); 1103088f3894Sahrens return (zap_lookup(os, obj, name, 8, 1, &value)); 1104088f3894Sahrens } 1105fa9e4066Sahrens 11069966ca11SMatthew Ahrens int 11073f9d6ad7SLin Ling zap_add_int_key(objset_t *os, uint64_t obj, 11083f9d6ad7SLin Ling uint64_t key, uint64_t value, dmu_tx_t *tx) 11093f9d6ad7SLin Ling { 11103f9d6ad7SLin Ling char name[20]; 11113f9d6ad7SLin Ling 11123f9d6ad7SLin Ling (void) snprintf(name, sizeof (name), "%llx", (longlong_t)key); 11133f9d6ad7SLin Ling return (zap_add(os, obj, name, 8, 1, &value, tx)); 11143f9d6ad7SLin Ling } 11153f9d6ad7SLin Ling 1116f1745736SMatthew Ahrens int 1117f1745736SMatthew Ahrens zap_update_int_key(objset_t *os, uint64_t obj, 1118f1745736SMatthew Ahrens uint64_t key, uint64_t value, dmu_tx_t *tx) 1119f1745736SMatthew Ahrens { 1120f1745736SMatthew Ahrens char name[20]; 1121f1745736SMatthew Ahrens 1122f1745736SMatthew Ahrens (void) snprintf(name, sizeof (name), "%llx", (longlong_t)key); 1123f1745736SMatthew Ahrens return (zap_update(os, obj, name, 8, 1, &value, tx)); 1124f1745736SMatthew Ahrens } 1125f1745736SMatthew Ahrens 11263f9d6ad7SLin Ling int 11273f9d6ad7SLin Ling zap_lookup_int_key(objset_t *os, uint64_t obj, uint64_t key, uint64_t *valuep) 11289966ca11SMatthew Ahrens { 11299966ca11SMatthew Ahrens char name[20]; 11303f9d6ad7SLin Ling 11313f9d6ad7SLin Ling (void) snprintf(name, sizeof (name), "%llx", (longlong_t)key); 11323f9d6ad7SLin Ling return (zap_lookup(os, obj, name, 8, 1, valuep)); 11333f9d6ad7SLin Ling } 11343f9d6ad7SLin Ling 11353f9d6ad7SLin Ling int 11363f9d6ad7SLin Ling zap_increment(objset_t *os, uint64_t obj, const char *name, int64_t delta, 11373f9d6ad7SLin Ling dmu_tx_t *tx) 11383f9d6ad7SLin Ling { 11399966ca11SMatthew Ahrens uint64_t value = 0; 11409966ca11SMatthew Ahrens int err; 11419966ca11SMatthew Ahrens 11429966ca11SMatthew Ahrens if (delta == 0) 11439966ca11SMatthew Ahrens return (0); 11449966ca11SMatthew Ahrens 11459966ca11SMatthew Ahrens err = zap_lookup(os, obj, name, 8, 1, &value); 11469966ca11SMatthew Ahrens if (err != 0 && err != ENOENT) 11479966ca11SMatthew Ahrens return (err); 11489966ca11SMatthew Ahrens value += delta; 11499966ca11SMatthew Ahrens if (value == 0) 11509966ca11SMatthew Ahrens err = zap_remove(os, obj, name, tx); 11519966ca11SMatthew Ahrens else 11529966ca11SMatthew Ahrens err = zap_update(os, obj, name, 8, 1, &value, tx); 11539966ca11SMatthew Ahrens return (err); 11549966ca11SMatthew Ahrens } 11559966ca11SMatthew Ahrens 11563f9d6ad7SLin Ling int 11573f9d6ad7SLin Ling zap_increment_int(objset_t *os, uint64_t obj, uint64_t key, int64_t delta, 11583f9d6ad7SLin Ling dmu_tx_t *tx) 11593f9d6ad7SLin Ling { 11603f9d6ad7SLin Ling char name[20]; 11613f9d6ad7SLin Ling 11623f9d6ad7SLin Ling (void) snprintf(name, sizeof (name), "%llx", (longlong_t)key); 11633f9d6ad7SLin Ling return (zap_increment(os, obj, name, delta, tx)); 11643f9d6ad7SLin Ling } 11659966ca11SMatthew Ahrens 1166fa9e4066Sahrens /* 1167fa9e4066Sahrens * Routines for iterating over the attributes. 1168fa9e4066Sahrens */ 1169fa9e4066Sahrens 1170fa9e4066Sahrens int 1171fa9e4066Sahrens fzap_cursor_retrieve(zap_t *zap, zap_cursor_t *zc, zap_attribute_t *za) 1172fa9e4066Sahrens { 1173fa9e4066Sahrens int err = ENOENT; 1174fa9e4066Sahrens zap_entry_handle_t zeh; 1175fa9e4066Sahrens zap_leaf_t *l; 1176fa9e4066Sahrens 1177fa9e4066Sahrens /* retrieve the next entry at or after zc_hash/zc_cd */ 1178fa9e4066Sahrens /* if no entry, return ENOENT */ 1179fa9e4066Sahrens 118087e5029aSahrens if (zc->zc_leaf && 118166328dd3Sahrens (ZAP_HASH_IDX(zc->zc_hash, 1182c1379625SJustin T. Gibbs zap_leaf_phys(zc->zc_leaf)->l_hdr.lh_prefix_len) != 1183c1379625SJustin T. Gibbs zap_leaf_phys(zc->zc_leaf)->l_hdr.lh_prefix)) { 118487e5029aSahrens rw_enter(&zc->zc_leaf->l_rwlock, RW_READER); 118587e5029aSahrens zap_put_leaf(zc->zc_leaf); 118687e5029aSahrens zc->zc_leaf = NULL; 118787e5029aSahrens } 118887e5029aSahrens 1189fa9e4066Sahrens again: 119087e5029aSahrens if (zc->zc_leaf == NULL) { 1191ea8dc4b6Seschrock err = zap_deref_leaf(zap, zc->zc_hash, NULL, RW_READER, 1192ea8dc4b6Seschrock &zc->zc_leaf); 1193ea8dc4b6Seschrock if (err != 0) 1194ea8dc4b6Seschrock return (err); 119587e5029aSahrens } else { 119687e5029aSahrens rw_enter(&zc->zc_leaf->l_rwlock, RW_READER); 119787e5029aSahrens } 119887e5029aSahrens l = zc->zc_leaf; 119987e5029aSahrens 1200fa9e4066Sahrens err = zap_leaf_lookup_closest(l, zc->zc_hash, zc->zc_cd, &zeh); 1201fa9e4066Sahrens 1202fa9e4066Sahrens if (err == ENOENT) { 120366328dd3Sahrens uint64_t nocare = 1204c1379625SJustin T. Gibbs (1ULL << (64 - zap_leaf_phys(l)->l_hdr.lh_prefix_len)) - 1; 1205fa9e4066Sahrens zc->zc_hash = (zc->zc_hash & ~nocare) + nocare + 1; 1206fa9e4066Sahrens zc->zc_cd = 0; 1207c1379625SJustin T. Gibbs if (zap_leaf_phys(l)->l_hdr.lh_prefix_len == 0 || 1208c1379625SJustin T. Gibbs zc->zc_hash == 0) { 1209fa9e4066Sahrens zc->zc_hash = -1ULL; 1210fa9e4066Sahrens } else { 121187e5029aSahrens zap_put_leaf(zc->zc_leaf); 121287e5029aSahrens zc->zc_leaf = NULL; 1213fa9e4066Sahrens goto again; 1214fa9e4066Sahrens } 1215fa9e4066Sahrens } 1216fa9e4066Sahrens 1217fa9e4066Sahrens if (err == 0) { 1218fa9e4066Sahrens zc->zc_hash = zeh.zeh_hash; 1219fa9e4066Sahrens zc->zc_cd = zeh.zeh_cd; 1220fa9e4066Sahrens za->za_integer_length = zeh.zeh_integer_size; 1221fa9e4066Sahrens za->za_num_integers = zeh.zeh_num_integers; 1222fa9e4066Sahrens if (zeh.zeh_num_integers == 0) { 1223fa9e4066Sahrens za->za_first_integer = 0; 1224fa9e4066Sahrens } else { 1225fa9e4066Sahrens err = zap_entry_read(&zeh, 8, 1, &za->za_first_integer); 1226fa9e4066Sahrens ASSERT(err == 0 || err == EOVERFLOW); 1227fa9e4066Sahrens } 1228b24ab676SJeff Bonwick err = zap_entry_read_name(zap, &zeh, 1229fa9e4066Sahrens sizeof (za->za_name), za->za_name); 1230fa9e4066Sahrens ASSERT(err == 0); 1231da6c28aaSamw 1232da6c28aaSamw za->za_normalization_conflict = 1233da6c28aaSamw zap_entry_normalization_conflict(&zeh, 1234da6c28aaSamw NULL, za->za_name, zap); 1235fa9e4066Sahrens } 123687e5029aSahrens rw_exit(&zc->zc_leaf->l_rwlock); 1237fa9e4066Sahrens return (err); 1238fa9e4066Sahrens } 1239fa9e4066Sahrens 1240fa9e4066Sahrens static void 1241fa9e4066Sahrens zap_stats_ptrtbl(zap_t *zap, uint64_t *tbl, int len, zap_stats_t *zs) 1242fa9e4066Sahrens { 1243ea8dc4b6Seschrock int i, err; 1244fa9e4066Sahrens uint64_t lastblk = 0; 1245fa9e4066Sahrens 1246fa9e4066Sahrens /* 1247fa9e4066Sahrens * NB: if a leaf has more pointers than an entire ptrtbl block 1248fa9e4066Sahrens * can hold, then it'll be accounted for more than once, since 1249fa9e4066Sahrens * we won't have lastblk. 1250fa9e4066Sahrens */ 1251fa9e4066Sahrens for (i = 0; i < len; i++) { 1252fa9e4066Sahrens zap_leaf_t *l; 1253fa9e4066Sahrens 1254fa9e4066Sahrens if (tbl[i] == lastblk) 1255fa9e4066Sahrens continue; 1256fa9e4066Sahrens lastblk = tbl[i]; 1257fa9e4066Sahrens 1258ea8dc4b6Seschrock err = zap_get_leaf_byblk(zap, tbl[i], NULL, RW_READER, &l); 1259ea8dc4b6Seschrock if (err == 0) { 126066328dd3Sahrens zap_leaf_stats(zap, l, zs); 1261ea8dc4b6Seschrock zap_put_leaf(l); 1262ea8dc4b6Seschrock } 1263fa9e4066Sahrens } 1264fa9e4066Sahrens } 1265fa9e4066Sahrens 1266fa9e4066Sahrens void 1267fa9e4066Sahrens fzap_get_stats(zap_t *zap, zap_stats_t *zs) 1268fa9e4066Sahrens { 1269f65e61c0Sahrens int bs = FZAP_BLOCK_SHIFT(zap); 1270f65e61c0Sahrens zs->zs_blocksize = 1ULL << bs; 12718248818dSnd 12728248818dSnd /* 12738248818dSnd * Set zap_phys_t fields 12748248818dSnd */ 1275c1379625SJustin T. Gibbs zs->zs_num_leafs = zap_f_phys(zap)->zap_num_leafs; 1276c1379625SJustin T. Gibbs zs->zs_num_entries = zap_f_phys(zap)->zap_num_entries; 1277c1379625SJustin T. Gibbs zs->zs_num_blocks = zap_f_phys(zap)->zap_freeblk; 1278c1379625SJustin T. Gibbs zs->zs_block_type = zap_f_phys(zap)->zap_block_type; 1279c1379625SJustin T. Gibbs zs->zs_magic = zap_f_phys(zap)->zap_magic; 1280c1379625SJustin T. Gibbs zs->zs_salt = zap_f_phys(zap)->zap_salt; 12818248818dSnd 12828248818dSnd /* 12838248818dSnd * Set zap_ptrtbl fields 12848248818dSnd */ 1285c1379625SJustin T. Gibbs zs->zs_ptrtbl_len = 1ULL << zap_f_phys(zap)->zap_ptrtbl.zt_shift; 1286c1379625SJustin T. Gibbs zs->zs_ptrtbl_nextblk = zap_f_phys(zap)->zap_ptrtbl.zt_nextblk; 12878248818dSnd zs->zs_ptrtbl_blks_copied = 1288c1379625SJustin T. Gibbs zap_f_phys(zap)->zap_ptrtbl.zt_blks_copied; 1289c1379625SJustin T. Gibbs zs->zs_ptrtbl_zt_blk = zap_f_phys(zap)->zap_ptrtbl.zt_blk; 1290c1379625SJustin T. Gibbs zs->zs_ptrtbl_zt_numblks = zap_f_phys(zap)->zap_ptrtbl.zt_numblks; 1291c1379625SJustin T. Gibbs zs->zs_ptrtbl_zt_shift = zap_f_phys(zap)->zap_ptrtbl.zt_shift; 1292fa9e4066Sahrens 1293c1379625SJustin T. Gibbs if (zap_f_phys(zap)->zap_ptrtbl.zt_numblks == 0) { 1294fa9e4066Sahrens /* the ptrtbl is entirely in the header block. */ 1295f65e61c0Sahrens zap_stats_ptrtbl(zap, &ZAP_EMBEDDED_PTRTBL_ENT(zap, 0), 1296f65e61c0Sahrens 1 << ZAP_EMBEDDED_PTRTBL_SHIFT(zap), zs); 1297fa9e4066Sahrens } else { 1298fa9e4066Sahrens int b; 1299fa9e4066Sahrens 1300a2cdcdd2SPaul Dagnelie dmu_prefetch(zap->zap_objset, zap->zap_object, 0, 1301c1379625SJustin T. Gibbs zap_f_phys(zap)->zap_ptrtbl.zt_blk << bs, 1302a2cdcdd2SPaul Dagnelie zap_f_phys(zap)->zap_ptrtbl.zt_numblks << bs, 1303a2cdcdd2SPaul Dagnelie ZIO_PRIORITY_SYNC_READ); 1304fa9e4066Sahrens 1305c1379625SJustin T. Gibbs for (b = 0; b < zap_f_phys(zap)->zap_ptrtbl.zt_numblks; 1306fa9e4066Sahrens b++) { 1307fa9e4066Sahrens dmu_buf_t *db; 1308ea8dc4b6Seschrock int err; 1309ea8dc4b6Seschrock 1310ea8dc4b6Seschrock err = dmu_buf_hold(zap->zap_objset, zap->zap_object, 1311c1379625SJustin T. Gibbs (zap_f_phys(zap)->zap_ptrtbl.zt_blk + b) << bs, 131247cb52daSJeff Bonwick FTAG, &db, DMU_READ_NO_PREFETCH); 1313ea8dc4b6Seschrock if (err == 0) { 1314ea8dc4b6Seschrock zap_stats_ptrtbl(zap, db->db_data, 1315ea8dc4b6Seschrock 1<<(bs-3), zs); 1316ea8dc4b6Seschrock dmu_buf_rele(db, FTAG); 1317ea8dc4b6Seschrock } 1318fa9e4066Sahrens } 1319fa9e4066Sahrens } 1320fa9e4066Sahrens } 13213d692628SSanjeev Bagewadi 13223d692628SSanjeev Bagewadi int 13230c779ad4SMatthew Ahrens fzap_count_write(zap_name_t *zn, int add, refcount_t *towrite, 13240c779ad4SMatthew Ahrens refcount_t *tooverwrite) 13253d692628SSanjeev Bagewadi { 13263d692628SSanjeev Bagewadi zap_t *zap = zn->zn_zap; 13273d692628SSanjeev Bagewadi zap_leaf_t *l; 13283d692628SSanjeev Bagewadi int err; 13293d692628SSanjeev Bagewadi 13303d692628SSanjeev Bagewadi /* 13313d692628SSanjeev Bagewadi * Account for the header block of the fatzap. 13323d692628SSanjeev Bagewadi */ 13333d692628SSanjeev Bagewadi if (!add && dmu_buf_freeable(zap->zap_dbuf)) { 13340c779ad4SMatthew Ahrens (void) refcount_add_many(tooverwrite, 13350c779ad4SMatthew Ahrens zap->zap_dbuf->db_size, FTAG); 13363d692628SSanjeev Bagewadi } else { 13370c779ad4SMatthew Ahrens (void) refcount_add_many(towrite, 13380c779ad4SMatthew Ahrens zap->zap_dbuf->db_size, FTAG); 13393d692628SSanjeev Bagewadi } 13403d692628SSanjeev Bagewadi 13413d692628SSanjeev Bagewadi /* 13423d692628SSanjeev Bagewadi * Account for the pointer table blocks. 13433d692628SSanjeev Bagewadi * If we are adding we need to account for the following cases : 13443d692628SSanjeev Bagewadi * - If the pointer table is embedded, this operation could force an 13453d692628SSanjeev Bagewadi * external pointer table. 13463d692628SSanjeev Bagewadi * - If this already has an external pointer table this operation 13473d692628SSanjeev Bagewadi * could extend the table. 13483d692628SSanjeev Bagewadi */ 13493d692628SSanjeev Bagewadi if (add) { 13500c779ad4SMatthew Ahrens if (zap_f_phys(zap)->zap_ptrtbl.zt_blk == 0) { 13510c779ad4SMatthew Ahrens (void) refcount_add_many(towrite, 13520c779ad4SMatthew Ahrens zap->zap_dbuf->db_size, FTAG); 13530c779ad4SMatthew Ahrens } else { 13540c779ad4SMatthew Ahrens (void) refcount_add_many(towrite, 13550c779ad4SMatthew Ahrens zap->zap_dbuf->db_size * 3, FTAG); 13560c779ad4SMatthew Ahrens } 13573d692628SSanjeev Bagewadi } 13583d692628SSanjeev Bagewadi 13593d692628SSanjeev Bagewadi /* 13603d692628SSanjeev Bagewadi * Now, check if the block containing leaf is freeable 13613d692628SSanjeev Bagewadi * and account accordingly. 13623d692628SSanjeev Bagewadi */ 13633d692628SSanjeev Bagewadi err = zap_deref_leaf(zap, zn->zn_hash, NULL, RW_READER, &l); 13643d692628SSanjeev Bagewadi if (err != 0) { 13653d692628SSanjeev Bagewadi return (err); 13663d692628SSanjeev Bagewadi } 13673d692628SSanjeev Bagewadi 13683d692628SSanjeev Bagewadi if (!add && dmu_buf_freeable(l->l_dbuf)) { 13690c779ad4SMatthew Ahrens (void) refcount_add_many(tooverwrite, l->l_dbuf->db_size, FTAG); 13703d692628SSanjeev Bagewadi } else { 13713d692628SSanjeev Bagewadi /* 13723d692628SSanjeev Bagewadi * If this an add operation, the leaf block could split. 13733d692628SSanjeev Bagewadi * Hence, we need to account for an additional leaf block. 13743d692628SSanjeev Bagewadi */ 13750c779ad4SMatthew Ahrens (void) refcount_add_many(towrite, 13760c779ad4SMatthew Ahrens (add ? 2 : 1) * l->l_dbuf->db_size, FTAG); 13773d692628SSanjeev Bagewadi } 13783d692628SSanjeev Bagewadi 13793d692628SSanjeev Bagewadi zap_put_leaf(l); 13803d692628SSanjeev Bagewadi return (0); 13813d692628SSanjeev Bagewadi } 1382