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 { 61*bf26014cSMatthew Ahrens uint64_t block_type = *(uint64_t *)vbuf; 62fa9e4066Sahrens 635ad82045Snd if (block_type == ZBT_LEAF || block_type == BSWAP_64(ZBT_LEAF)) 64f65e61c0Sahrens zap_leaf_byteswap(vbuf, size); 655ad82045Snd else { 66fa9e4066Sahrens /* it's a ptrtbl block */ 67f65e61c0Sahrens byteswap_uint64_array(vbuf, size); 68fa9e4066Sahrens } 69fa9e4066Sahrens } 70fa9e4066Sahrens 71fa9e4066Sahrens void 72b24ab676SJeff Bonwick fzap_upgrade(zap_t *zap, dmu_tx_t *tx, zap_flags_t flags) 73fa9e4066Sahrens { 74fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 75fa9e4066Sahrens zap->zap_ismicro = FALSE; 76fa9e4066Sahrens 7740510e8eSJosef 'Jeff' Sipek zap->zap_dbu.dbu_evict_func_sync = zap_evict_sync; 7840510e8eSJosef 'Jeff' Sipek zap->zap_dbu.dbu_evict_func_async = NULL; 79fa9e4066Sahrens 80fa9e4066Sahrens mutex_init(&zap->zap_f.zap_num_entries_mtx, 0, 0, 0); 81bf16b11eSMatthew Ahrens zap->zap_f.zap_block_shift = highbit64(zap->zap_dbuf->db_size) - 1; 82fa9e4066Sahrens 83*bf26014cSMatthew Ahrens zap_phys_t *zp = zap_f_phys(zap); 84fa9e4066Sahrens /* 85fa9e4066Sahrens * explicitly zero it since it might be coming from an 86fa9e4066Sahrens * initialized microzap 87fa9e4066Sahrens */ 88f65e61c0Sahrens bzero(zap->zap_dbuf->db_data, zap->zap_dbuf->db_size); 89fa9e4066Sahrens zp->zap_block_type = ZBT_HEADER; 90fa9e4066Sahrens zp->zap_magic = ZAP_MAGIC; 91fa9e4066Sahrens 92f65e61c0Sahrens zp->zap_ptrtbl.zt_shift = ZAP_EMBEDDED_PTRTBL_SHIFT(zap); 93fa9e4066Sahrens 94fa9e4066Sahrens zp->zap_freeblk = 2; /* block 1 will be the first leaf */ 95fa9e4066Sahrens zp->zap_num_leafs = 1; 96fa9e4066Sahrens zp->zap_num_entries = 0; 97fa9e4066Sahrens zp->zap_salt = zap->zap_salt; 98da6c28aaSamw zp->zap_normflags = zap->zap_normflags; 99b24ab676SJeff Bonwick zp->zap_flags = flags; 100fa9e4066Sahrens 101f65e61c0Sahrens /* block 1 will be the first leaf */ 102*bf26014cSMatthew Ahrens for (int i = 0; i < (1<<zp->zap_ptrtbl.zt_shift); i++) 103f65e61c0Sahrens ZAP_EMBEDDED_PTRTBL_ENT(zap, i) = 1; 104fa9e4066Sahrens 105fa9e4066Sahrens /* 106fa9e4066Sahrens * set up block 1 - the first leaf 107fa9e4066Sahrens */ 108*bf26014cSMatthew Ahrens dmu_buf_t *db; 109*bf26014cSMatthew Ahrens VERIFY0(dmu_buf_hold(zap->zap_objset, zap->zap_object, 11047cb52daSJeff Bonwick 1<<FZAP_BLOCK_SHIFT(zap), FTAG, &db, DMU_READ_NO_PREFETCH)); 111fa9e4066Sahrens dmu_buf_will_dirty(db, tx); 112fa9e4066Sahrens 113*bf26014cSMatthew Ahrens zap_leaf_t *l = kmem_zalloc(sizeof (zap_leaf_t), KM_SLEEP); 114fa9e4066Sahrens l->l_dbuf = db; 115fa9e4066Sahrens 116de8267e0Stimh zap_leaf_init(l, zp->zap_normflags != 0); 117fa9e4066Sahrens 118fa9e4066Sahrens kmem_free(l, sizeof (zap_leaf_t)); 119ea8dc4b6Seschrock dmu_buf_rele(db, FTAG); 120fa9e4066Sahrens } 121fa9e4066Sahrens 122fa9e4066Sahrens static int 123fa9e4066Sahrens zap_tryupgradedir(zap_t *zap, dmu_tx_t *tx) 124fa9e4066Sahrens { 125fa9e4066Sahrens if (RW_WRITE_HELD(&zap->zap_rwlock)) 126fa9e4066Sahrens return (1); 127fa9e4066Sahrens if (rw_tryupgrade(&zap->zap_rwlock)) { 128fa9e4066Sahrens dmu_buf_will_dirty(zap->zap_dbuf, tx); 129fa9e4066Sahrens return (1); 130fa9e4066Sahrens } 131fa9e4066Sahrens return (0); 132fa9e4066Sahrens } 133fa9e4066Sahrens 134fa9e4066Sahrens /* 135fa9e4066Sahrens * Generic routines for dealing with the pointer & cookie tables. 136fa9e4066Sahrens */ 137fa9e4066Sahrens 13866328dd3Sahrens static int 139fa9e4066Sahrens zap_table_grow(zap_t *zap, zap_table_phys_t *tbl, 140fa9e4066Sahrens void (*transfer_func)(const uint64_t *src, uint64_t *dst, int n), 141fa9e4066Sahrens dmu_tx_t *tx) 142fa9e4066Sahrens { 143*bf26014cSMatthew Ahrens uint64_t newblk; 144f65e61c0Sahrens int bs = FZAP_BLOCK_SHIFT(zap); 145f65e61c0Sahrens int hepb = 1<<(bs-4); 146fa9e4066Sahrens /* hepb = half the number of entries in a block */ 147fa9e4066Sahrens 148fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 149fa9e4066Sahrens ASSERT(tbl->zt_blk != 0); 150fa9e4066Sahrens ASSERT(tbl->zt_numblks > 0); 151fa9e4066Sahrens 152fa9e4066Sahrens if (tbl->zt_nextblk != 0) { 153fa9e4066Sahrens newblk = tbl->zt_nextblk; 154fa9e4066Sahrens } else { 15566328dd3Sahrens newblk = zap_allocate_blocks(zap, tbl->zt_numblks * 2); 156fa9e4066Sahrens tbl->zt_nextblk = newblk; 157fb09f5aaSMadhav Suresh ASSERT0(tbl->zt_blks_copied); 158a2cdcdd2SPaul Dagnelie dmu_prefetch(zap->zap_objset, zap->zap_object, 0, 159a2cdcdd2SPaul Dagnelie tbl->zt_blk << bs, tbl->zt_numblks << bs, 160a2cdcdd2SPaul Dagnelie ZIO_PRIORITY_SYNC_READ); 161fa9e4066Sahrens } 162fa9e4066Sahrens 163fa9e4066Sahrens /* 16466328dd3Sahrens * Copy the ptrtbl from the old to new location. 165fa9e4066Sahrens */ 166fa9e4066Sahrens 167*bf26014cSMatthew Ahrens uint64_t b = tbl->zt_blks_copied; 168*bf26014cSMatthew Ahrens dmu_buf_t *db_old; 169*bf26014cSMatthew Ahrens int err = dmu_buf_hold(zap->zap_objset, zap->zap_object, 17047cb52daSJeff Bonwick (tbl->zt_blk + b) << bs, FTAG, &db_old, DMU_READ_NO_PREFETCH); 171*bf26014cSMatthew Ahrens if (err != 0) 17266328dd3Sahrens return (err); 173fa9e4066Sahrens 174fa9e4066Sahrens /* first half of entries in old[b] go to new[2*b+0] */ 175*bf26014cSMatthew Ahrens dmu_buf_t *db_new; 176*bf26014cSMatthew Ahrens VERIFY0(dmu_buf_hold(zap->zap_objset, zap->zap_object, 17747cb52daSJeff Bonwick (newblk + 2*b+0) << bs, FTAG, &db_new, DMU_READ_NO_PREFETCH)); 178fa9e4066Sahrens dmu_buf_will_dirty(db_new, tx); 179fa9e4066Sahrens transfer_func(db_old->db_data, db_new->db_data, hepb); 180ea8dc4b6Seschrock dmu_buf_rele(db_new, FTAG); 181fa9e4066Sahrens 182fa9e4066Sahrens /* second half of entries in old[b] go to new[2*b+1] */ 183*bf26014cSMatthew Ahrens VERIFY0(dmu_buf_hold(zap->zap_objset, zap->zap_object, 18447cb52daSJeff Bonwick (newblk + 2*b+1) << bs, FTAG, &db_new, DMU_READ_NO_PREFETCH)); 185fa9e4066Sahrens dmu_buf_will_dirty(db_new, tx); 186fa9e4066Sahrens transfer_func((uint64_t *)db_old->db_data + hepb, 187fa9e4066Sahrens db_new->db_data, hepb); 188ea8dc4b6Seschrock dmu_buf_rele(db_new, FTAG); 189fa9e4066Sahrens 190ea8dc4b6Seschrock dmu_buf_rele(db_old, FTAG); 191fa9e4066Sahrens 192fa9e4066Sahrens tbl->zt_blks_copied++; 193fa9e4066Sahrens 194fa9e4066Sahrens dprintf("copied block %llu of %llu\n", 195fa9e4066Sahrens tbl->zt_blks_copied, tbl->zt_numblks); 196fa9e4066Sahrens 197fa9e4066Sahrens if (tbl->zt_blks_copied == tbl->zt_numblks) { 198ea8dc4b6Seschrock (void) dmu_free_range(zap->zap_objset, zap->zap_object, 199f65e61c0Sahrens tbl->zt_blk << bs, tbl->zt_numblks << bs, tx); 200fa9e4066Sahrens 201fa9e4066Sahrens tbl->zt_blk = newblk; 202fa9e4066Sahrens tbl->zt_numblks *= 2; 203fa9e4066Sahrens tbl->zt_shift++; 204fa9e4066Sahrens tbl->zt_nextblk = 0; 205fa9e4066Sahrens tbl->zt_blks_copied = 0; 206fa9e4066Sahrens 207fa9e4066Sahrens dprintf("finished; numblocks now %llu (%lluk entries)\n", 208fa9e4066Sahrens tbl->zt_numblks, 1<<(tbl->zt_shift-10)); 209fa9e4066Sahrens } 21066328dd3Sahrens 21166328dd3Sahrens return (0); 212fa9e4066Sahrens } 213fa9e4066Sahrens 214ea8dc4b6Seschrock static int 215fa9e4066Sahrens zap_table_store(zap_t *zap, zap_table_phys_t *tbl, uint64_t idx, uint64_t val, 216fa9e4066Sahrens dmu_tx_t *tx) 217fa9e4066Sahrens { 218f65e61c0Sahrens int bs = FZAP_BLOCK_SHIFT(zap); 219fa9e4066Sahrens 220fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 221fa9e4066Sahrens ASSERT(tbl->zt_blk != 0); 222fa9e4066Sahrens 223fa9e4066Sahrens dprintf("storing %llx at index %llx\n", val, idx); 224fa9e4066Sahrens 225*bf26014cSMatthew Ahrens uint64_t blk = idx >> (bs-3); 226*bf26014cSMatthew Ahrens uint64_t off = idx & ((1<<(bs-3))-1); 227fa9e4066Sahrens 228*bf26014cSMatthew Ahrens dmu_buf_t *db; 229*bf26014cSMatthew Ahrens int err = dmu_buf_hold(zap->zap_objset, zap->zap_object, 23047cb52daSJeff Bonwick (tbl->zt_blk + blk) << bs, FTAG, &db, DMU_READ_NO_PREFETCH); 231*bf26014cSMatthew Ahrens if (err != 0) 232ea8dc4b6Seschrock return (err); 233fa9e4066Sahrens dmu_buf_will_dirty(db, tx); 234fa9e4066Sahrens 235fa9e4066Sahrens if (tbl->zt_nextblk != 0) { 236ea8dc4b6Seschrock uint64_t idx2 = idx * 2; 237ea8dc4b6Seschrock uint64_t blk2 = idx2 >> (bs-3); 238ea8dc4b6Seschrock uint64_t off2 = idx2 & ((1<<(bs-3))-1); 239ea8dc4b6Seschrock dmu_buf_t *db2; 240ea8dc4b6Seschrock 241ea8dc4b6Seschrock err = dmu_buf_hold(zap->zap_objset, zap->zap_object, 24247cb52daSJeff Bonwick (tbl->zt_nextblk + blk2) << bs, FTAG, &db2, 24347cb52daSJeff Bonwick DMU_READ_NO_PREFETCH); 244*bf26014cSMatthew Ahrens if (err != 0) { 245ea8dc4b6Seschrock dmu_buf_rele(db, FTAG); 246ea8dc4b6Seschrock return (err); 247ea8dc4b6Seschrock } 248ea8dc4b6Seschrock dmu_buf_will_dirty(db2, tx); 249ea8dc4b6Seschrock ((uint64_t *)db2->db_data)[off2] = val; 250ea8dc4b6Seschrock ((uint64_t *)db2->db_data)[off2+1] = val; 251ea8dc4b6Seschrock dmu_buf_rele(db2, FTAG); 252fa9e4066Sahrens } 253fa9e4066Sahrens 254ea8dc4b6Seschrock ((uint64_t *)db->db_data)[off] = val; 255ea8dc4b6Seschrock dmu_buf_rele(db, FTAG); 256ea8dc4b6Seschrock 257ea8dc4b6Seschrock return (0); 258fa9e4066Sahrens } 259fa9e4066Sahrens 260ea8dc4b6Seschrock static int 261ea8dc4b6Seschrock zap_table_load(zap_t *zap, zap_table_phys_t *tbl, uint64_t idx, uint64_t *valp) 262fa9e4066Sahrens { 263f65e61c0Sahrens int bs = FZAP_BLOCK_SHIFT(zap); 264fa9e4066Sahrens 265fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 266fa9e4066Sahrens 267*bf26014cSMatthew Ahrens uint64_t blk = idx >> (bs-3); 268*bf26014cSMatthew Ahrens uint64_t off = idx & ((1<<(bs-3))-1); 269fa9e4066Sahrens 27079d72832SMatthew Ahrens /* 27179d72832SMatthew Ahrens * Note: this is equivalent to dmu_buf_hold(), but we use 27279d72832SMatthew Ahrens * _dnode_enter / _by_dnode because it's faster because we don't 27379d72832SMatthew Ahrens * have to hold the dnode. 27479d72832SMatthew Ahrens */ 275*bf26014cSMatthew Ahrens dnode_t *dn = dmu_buf_dnode_enter(zap->zap_dbuf); 276*bf26014cSMatthew Ahrens dmu_buf_t *db; 277*bf26014cSMatthew Ahrens int err = dmu_buf_hold_by_dnode(dn, 27847cb52daSJeff Bonwick (tbl->zt_blk + blk) << bs, FTAG, &db, DMU_READ_NO_PREFETCH); 27979d72832SMatthew Ahrens dmu_buf_dnode_exit(zap->zap_dbuf); 280*bf26014cSMatthew Ahrens if (err != 0) 281ea8dc4b6Seschrock return (err); 282ea8dc4b6Seschrock *valp = ((uint64_t *)db->db_data)[off]; 283ea8dc4b6Seschrock dmu_buf_rele(db, FTAG); 284ea8dc4b6Seschrock 285ea8dc4b6Seschrock if (tbl->zt_nextblk != 0) { 286ea8dc4b6Seschrock /* 287ea8dc4b6Seschrock * read the nextblk for the sake of i/o error checking, 288ea8dc4b6Seschrock * so that zap_table_load() will catch errors for 289ea8dc4b6Seschrock * zap_table_store. 290ea8dc4b6Seschrock */ 291ea8dc4b6Seschrock blk = (idx*2) >> (bs-3); 292ea8dc4b6Seschrock 29379d72832SMatthew Ahrens dn = dmu_buf_dnode_enter(zap->zap_dbuf); 29479d72832SMatthew Ahrens err = dmu_buf_hold_by_dnode(dn, 29547cb52daSJeff Bonwick (tbl->zt_nextblk + blk) << bs, FTAG, &db, 29647cb52daSJeff Bonwick DMU_READ_NO_PREFETCH); 29779d72832SMatthew Ahrens dmu_buf_dnode_exit(zap->zap_dbuf); 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 { 311*bf26014cSMatthew Ahrens for (int i = 0; i < n; i++) { 312fa9e4066Sahrens uint64_t lb = src[i]; 313*bf26014cSMatthew Ahrens dst[2 * i + 0] = lb; 314*bf26014cSMatthew Ahrens dst[2 * i + 1] = lb; 315fa9e4066Sahrens } 316fa9e4066Sahrens } 317fa9e4066Sahrens 31866328dd3Sahrens static int 319fa9e4066Sahrens zap_grow_ptrtbl(zap_t *zap, dmu_tx_t *tx) 320fa9e4066Sahrens { 321b24ab676SJeff Bonwick /* 322b24ab676SJeff Bonwick * The pointer table should never use more hash bits than we 323b24ab676SJeff Bonwick * have (otherwise we'd be using useless zero bits to index it). 324b24ab676SJeff Bonwick * If we are within 2 bits of running out, stop growing, since 325b24ab676SJeff Bonwick * this is already an aberrant condition. 326b24ab676SJeff Bonwick */ 327c1379625SJustin T. Gibbs if (zap_f_phys(zap)->zap_ptrtbl.zt_shift >= zap_hashbits(zap) - 2) 328be6fd75aSMatthew Ahrens return (SET_ERROR(ENOSPC)); 329fa9e4066Sahrens 330c1379625SJustin T. Gibbs if (zap_f_phys(zap)->zap_ptrtbl.zt_numblks == 0) { 331fa9e4066Sahrens /* 332f65e61c0Sahrens * We are outgrowing the "embedded" ptrtbl (the one 333f65e61c0Sahrens * stored in the header block). Give it its own entire 334f65e61c0Sahrens * block, which will double the size of the ptrtbl. 335fa9e4066Sahrens */ 336c1379625SJustin T. Gibbs ASSERT3U(zap_f_phys(zap)->zap_ptrtbl.zt_shift, ==, 337f65e61c0Sahrens ZAP_EMBEDDED_PTRTBL_SHIFT(zap)); 338c1379625SJustin T. Gibbs ASSERT0(zap_f_phys(zap)->zap_ptrtbl.zt_blk); 339fa9e4066Sahrens 340*bf26014cSMatthew Ahrens uint64_t newblk = zap_allocate_blocks(zap, 1); 341*bf26014cSMatthew Ahrens dmu_buf_t *db_new; 342*bf26014cSMatthew Ahrens int err = dmu_buf_hold(zap->zap_objset, zap->zap_object, 34347cb52daSJeff Bonwick newblk << FZAP_BLOCK_SHIFT(zap), FTAG, &db_new, 34447cb52daSJeff Bonwick DMU_READ_NO_PREFETCH); 345*bf26014cSMatthew Ahrens if (err != 0) 34666328dd3Sahrens return (err); 347fa9e4066Sahrens dmu_buf_will_dirty(db_new, tx); 348f65e61c0Sahrens zap_ptrtbl_transfer(&ZAP_EMBEDDED_PTRTBL_ENT(zap, 0), 349f65e61c0Sahrens db_new->db_data, 1 << ZAP_EMBEDDED_PTRTBL_SHIFT(zap)); 350ea8dc4b6Seschrock dmu_buf_rele(db_new, FTAG); 351fa9e4066Sahrens 352c1379625SJustin T. Gibbs zap_f_phys(zap)->zap_ptrtbl.zt_blk = newblk; 353c1379625SJustin T. Gibbs zap_f_phys(zap)->zap_ptrtbl.zt_numblks = 1; 354c1379625SJustin T. Gibbs zap_f_phys(zap)->zap_ptrtbl.zt_shift++; 355fa9e4066Sahrens 356c1379625SJustin T. Gibbs ASSERT3U(1ULL << zap_f_phys(zap)->zap_ptrtbl.zt_shift, ==, 357c1379625SJustin T. Gibbs zap_f_phys(zap)->zap_ptrtbl.zt_numblks << 358f65e61c0Sahrens (FZAP_BLOCK_SHIFT(zap)-3)); 35966328dd3Sahrens 36066328dd3Sahrens return (0); 361fa9e4066Sahrens } else { 362c1379625SJustin T. Gibbs return (zap_table_grow(zap, &zap_f_phys(zap)->zap_ptrtbl, 36366328dd3Sahrens zap_ptrtbl_transfer, tx)); 364fa9e4066Sahrens } 365fa9e4066Sahrens } 366fa9e4066Sahrens 367fa9e4066Sahrens static void 368fa9e4066Sahrens zap_increment_num_entries(zap_t *zap, int delta, dmu_tx_t *tx) 369fa9e4066Sahrens { 370fa9e4066Sahrens dmu_buf_will_dirty(zap->zap_dbuf, tx); 371fa9e4066Sahrens mutex_enter(&zap->zap_f.zap_num_entries_mtx); 372c1379625SJustin T. Gibbs ASSERT(delta > 0 || zap_f_phys(zap)->zap_num_entries >= -delta); 373c1379625SJustin T. Gibbs zap_f_phys(zap)->zap_num_entries += delta; 374fa9e4066Sahrens mutex_exit(&zap->zap_f.zap_num_entries_mtx); 375fa9e4066Sahrens } 376fa9e4066Sahrens 37766328dd3Sahrens static uint64_t 37866328dd3Sahrens zap_allocate_blocks(zap_t *zap, int nblocks) 379fa9e4066Sahrens { 38066328dd3Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 381*bf26014cSMatthew Ahrens uint64_t newblk = zap_f_phys(zap)->zap_freeblk; 382c1379625SJustin T. Gibbs zap_f_phys(zap)->zap_freeblk += nblocks; 383fa9e4066Sahrens return (newblk); 384fa9e4066Sahrens } 385fa9e4066Sahrens 386bc9014e6SJustin Gibbs static void 38740510e8eSJosef 'Jeff' Sipek zap_leaf_evict_sync(void *dbu) 388bc9014e6SJustin Gibbs { 389bc9014e6SJustin Gibbs zap_leaf_t *l = dbu; 390bc9014e6SJustin Gibbs 391bc9014e6SJustin Gibbs rw_destroy(&l->l_rwlock); 392bc9014e6SJustin Gibbs kmem_free(l, sizeof (zap_leaf_t)); 393bc9014e6SJustin Gibbs } 394bc9014e6SJustin Gibbs 39566328dd3Sahrens static zap_leaf_t * 396fa9e4066Sahrens zap_create_leaf(zap_t *zap, dmu_tx_t *tx) 397fa9e4066Sahrens { 398bc9014e6SJustin Gibbs zap_leaf_t *l = kmem_zalloc(sizeof (zap_leaf_t), KM_SLEEP); 399fa9e4066Sahrens 400fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 401fa9e4066Sahrens 402fa9e4066Sahrens rw_init(&l->l_rwlock, 0, 0, 0); 403fa9e4066Sahrens rw_enter(&l->l_rwlock, RW_WRITER); 40466328dd3Sahrens l->l_blkid = zap_allocate_blocks(zap, 1); 405fa9e4066Sahrens l->l_dbuf = NULL; 406fa9e4066Sahrens 407*bf26014cSMatthew Ahrens VERIFY0(dmu_buf_hold(zap->zap_objset, zap->zap_object, 40847cb52daSJeff Bonwick l->l_blkid << FZAP_BLOCK_SHIFT(zap), NULL, &l->l_dbuf, 40947cb52daSJeff Bonwick DMU_READ_NO_PREFETCH)); 41040510e8eSJosef 'Jeff' Sipek dmu_buf_init_user(&l->l_dbu, zap_leaf_evict_sync, NULL, &l->l_dbuf); 411*bf26014cSMatthew Ahrens VERIFY3P(NULL, ==, dmu_buf_set_user(l->l_dbuf, &l->l_dbu)); 412fa9e4066Sahrens dmu_buf_will_dirty(l->l_dbuf, tx); 413fa9e4066Sahrens 414de8267e0Stimh zap_leaf_init(l, zap->zap_normflags != 0); 415fa9e4066Sahrens 416c1379625SJustin T. Gibbs zap_f_phys(zap)->zap_num_leafs++; 417fa9e4066Sahrens 41866328dd3Sahrens return (l); 419fa9e4066Sahrens } 420fa9e4066Sahrens 421fa9e4066Sahrens int 422fa9e4066Sahrens fzap_count(zap_t *zap, uint64_t *count) 423fa9e4066Sahrens { 424fa9e4066Sahrens ASSERT(!zap->zap_ismicro); 425fa9e4066Sahrens mutex_enter(&zap->zap_f.zap_num_entries_mtx); /* unnecessary */ 426c1379625SJustin T. Gibbs *count = zap_f_phys(zap)->zap_num_entries; 427fa9e4066Sahrens mutex_exit(&zap->zap_f.zap_num_entries_mtx); 428fa9e4066Sahrens return (0); 429fa9e4066Sahrens } 430fa9e4066Sahrens 431fa9e4066Sahrens /* 432fa9e4066Sahrens * Routines for obtaining zap_leaf_t's 433fa9e4066Sahrens */ 434fa9e4066Sahrens 43587e5029aSahrens void 436fa9e4066Sahrens zap_put_leaf(zap_leaf_t *l) 437fa9e4066Sahrens { 438fa9e4066Sahrens rw_exit(&l->l_rwlock); 439ea8dc4b6Seschrock dmu_buf_rele(l->l_dbuf, NULL); 440fa9e4066Sahrens } 441fa9e4066Sahrens 442fa9e4066Sahrens static zap_leaf_t * 443fa9e4066Sahrens zap_open_leaf(uint64_t blkid, dmu_buf_t *db) 444fa9e4066Sahrens { 445fa9e4066Sahrens ASSERT(blkid != 0); 446fa9e4066Sahrens 447*bf26014cSMatthew Ahrens zap_leaf_t *l = kmem_zalloc(sizeof (zap_leaf_t), KM_SLEEP); 448fa9e4066Sahrens rw_init(&l->l_rwlock, 0, 0, 0); 449fa9e4066Sahrens rw_enter(&l->l_rwlock, RW_WRITER); 450fa9e4066Sahrens l->l_blkid = blkid; 451bf16b11eSMatthew Ahrens l->l_bs = highbit64(db->db_size) - 1; 452fa9e4066Sahrens l->l_dbuf = db; 453fa9e4066Sahrens 45440510e8eSJosef 'Jeff' Sipek dmu_buf_init_user(&l->l_dbu, zap_leaf_evict_sync, NULL, &l->l_dbuf); 455*bf26014cSMatthew Ahrens zap_leaf_t *winner = dmu_buf_set_user(db, &l->l_dbu); 456fa9e4066Sahrens 457fa9e4066Sahrens rw_exit(&l->l_rwlock); 458fa9e4066Sahrens if (winner != NULL) { 459fa9e4066Sahrens /* someone else set it first */ 46040510e8eSJosef 'Jeff' Sipek zap_leaf_evict_sync(&l->l_dbu); 461fa9e4066Sahrens l = winner; 462fa9e4066Sahrens } 463fa9e4066Sahrens 46466328dd3Sahrens /* 46566328dd3Sahrens * lhr_pad was previously used for the next leaf in the leaf 46666328dd3Sahrens * chain. There should be no chained leafs (as we have removed 46766328dd3Sahrens * support for them). 46866328dd3Sahrens */ 469c1379625SJustin T. Gibbs ASSERT0(zap_leaf_phys(l)->l_hdr.lh_pad1); 47066328dd3Sahrens 471f65e61c0Sahrens /* 472f65e61c0Sahrens * There should be more hash entries than there can be 473f65e61c0Sahrens * chunks to put in the hash table 474f65e61c0Sahrens */ 475f65e61c0Sahrens ASSERT3U(ZAP_LEAF_HASH_NUMENTRIES(l), >, ZAP_LEAF_NUMCHUNKS(l) / 3); 476f65e61c0Sahrens 477f65e61c0Sahrens /* The chunks should begin at the end of the hash table */ 478f65e61c0Sahrens ASSERT3P(&ZAP_LEAF_CHUNK(l, 0), ==, 479c1379625SJustin T. Gibbs &zap_leaf_phys(l)->l_hash[ZAP_LEAF_HASH_NUMENTRIES(l)]); 480f65e61c0Sahrens 481f65e61c0Sahrens /* The chunks should end at the end of the block */ 482f65e61c0Sahrens ASSERT3U((uintptr_t)&ZAP_LEAF_CHUNK(l, ZAP_LEAF_NUMCHUNKS(l)) - 483c1379625SJustin T. Gibbs (uintptr_t)zap_leaf_phys(l), ==, l->l_dbuf->db_size); 484f65e61c0Sahrens 485fa9e4066Sahrens return (l); 486fa9e4066Sahrens } 487fa9e4066Sahrens 488ea8dc4b6Seschrock static int 48966328dd3Sahrens zap_get_leaf_byblk(zap_t *zap, uint64_t blkid, dmu_tx_t *tx, krw_t lt, 490ea8dc4b6Seschrock zap_leaf_t **lp) 491fa9e4066Sahrens { 492fa9e4066Sahrens dmu_buf_t *db; 493fa9e4066Sahrens 494fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 495fa9e4066Sahrens 496*bf26014cSMatthew Ahrens int bs = FZAP_BLOCK_SHIFT(zap); 49779d72832SMatthew Ahrens dnode_t *dn = dmu_buf_dnode_enter(zap->zap_dbuf); 498*bf26014cSMatthew Ahrens int err = dmu_buf_hold_by_dnode(dn, 49947cb52daSJeff Bonwick blkid << bs, NULL, &db, DMU_READ_NO_PREFETCH); 50079d72832SMatthew Ahrens dmu_buf_dnode_exit(zap->zap_dbuf); 501*bf26014cSMatthew Ahrens if (err != 0) 502ea8dc4b6Seschrock return (err); 503fa9e4066Sahrens 504fa9e4066Sahrens ASSERT3U(db->db_object, ==, zap->zap_object); 505f65e61c0Sahrens ASSERT3U(db->db_offset, ==, blkid << bs); 506f65e61c0Sahrens ASSERT3U(db->db_size, ==, 1 << bs); 507fa9e4066Sahrens ASSERT(blkid != 0); 508fa9e4066Sahrens 509*bf26014cSMatthew Ahrens zap_leaf_t *l = dmu_buf_get_user(db); 510fa9e4066Sahrens 511fa9e4066Sahrens if (l == NULL) 512fa9e4066Sahrens l = zap_open_leaf(blkid, db); 513fa9e4066Sahrens 514fa9e4066Sahrens rw_enter(&l->l_rwlock, lt); 515fa9e4066Sahrens /* 516c1379625SJustin T. Gibbs * Must lock before dirtying, otherwise zap_leaf_phys(l) could change, 517fa9e4066Sahrens * causing ASSERT below to fail. 518fa9e4066Sahrens */ 519fa9e4066Sahrens if (lt == RW_WRITER) 520fa9e4066Sahrens dmu_buf_will_dirty(db, tx); 521fa9e4066Sahrens ASSERT3U(l->l_blkid, ==, blkid); 522fa9e4066Sahrens ASSERT3P(l->l_dbuf, ==, db); 523c1379625SJustin T. Gibbs ASSERT3U(zap_leaf_phys(l)->l_hdr.lh_block_type, ==, ZBT_LEAF); 524c1379625SJustin T. Gibbs ASSERT3U(zap_leaf_phys(l)->l_hdr.lh_magic, ==, ZAP_LEAF_MAGIC); 525fa9e4066Sahrens 526ea8dc4b6Seschrock *lp = l; 527ea8dc4b6Seschrock return (0); 528fa9e4066Sahrens } 529fa9e4066Sahrens 530ea8dc4b6Seschrock static int 531ea8dc4b6Seschrock zap_idx_to_blk(zap_t *zap, uint64_t idx, uint64_t *valp) 532fa9e4066Sahrens { 533fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 534fa9e4066Sahrens 535c1379625SJustin T. Gibbs if (zap_f_phys(zap)->zap_ptrtbl.zt_numblks == 0) { 536fa9e4066Sahrens ASSERT3U(idx, <, 537c1379625SJustin T. Gibbs (1ULL << zap_f_phys(zap)->zap_ptrtbl.zt_shift)); 538ea8dc4b6Seschrock *valp = ZAP_EMBEDDED_PTRTBL_ENT(zap, idx); 539ea8dc4b6Seschrock return (0); 540fa9e4066Sahrens } else { 541c1379625SJustin T. Gibbs return (zap_table_load(zap, &zap_f_phys(zap)->zap_ptrtbl, 542ea8dc4b6Seschrock idx, valp)); 543fa9e4066Sahrens } 544fa9e4066Sahrens } 545fa9e4066Sahrens 546ea8dc4b6Seschrock static int 547fa9e4066Sahrens zap_set_idx_to_blk(zap_t *zap, uint64_t idx, uint64_t blk, dmu_tx_t *tx) 548fa9e4066Sahrens { 549fa9e4066Sahrens ASSERT(tx != NULL); 550fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 551fa9e4066Sahrens 552c1379625SJustin T. Gibbs if (zap_f_phys(zap)->zap_ptrtbl.zt_blk == 0) { 553f65e61c0Sahrens ZAP_EMBEDDED_PTRTBL_ENT(zap, idx) = blk; 554ea8dc4b6Seschrock return (0); 555fa9e4066Sahrens } else { 556c1379625SJustin T. Gibbs return (zap_table_store(zap, &zap_f_phys(zap)->zap_ptrtbl, 557ea8dc4b6Seschrock idx, blk, tx)); 558fa9e4066Sahrens } 559fa9e4066Sahrens } 560fa9e4066Sahrens 561ea8dc4b6Seschrock static int 562ea8dc4b6Seschrock zap_deref_leaf(zap_t *zap, uint64_t h, dmu_tx_t *tx, krw_t lt, zap_leaf_t **lp) 563fa9e4066Sahrens { 564*bf26014cSMatthew Ahrens uint64_t blk; 565fa9e4066Sahrens 566fa9e4066Sahrens ASSERT(zap->zap_dbuf == NULL || 567c1379625SJustin T. Gibbs zap_f_phys(zap) == zap->zap_dbuf->db_data); 56802525cd0SChunwei Chen 56902525cd0SChunwei Chen /* Reality check for corrupt zap objects (leaf or header). */ 57002525cd0SChunwei Chen if ((zap_f_phys(zap)->zap_block_type != ZBT_LEAF && 57102525cd0SChunwei Chen zap_f_phys(zap)->zap_block_type != ZBT_HEADER) || 57202525cd0SChunwei Chen zap_f_phys(zap)->zap_magic != ZAP_MAGIC) { 57302525cd0SChunwei Chen return (SET_ERROR(EIO)); 57402525cd0SChunwei Chen } 57502525cd0SChunwei Chen 576*bf26014cSMatthew Ahrens uint64_t idx = ZAP_HASH_IDX(h, zap_f_phys(zap)->zap_ptrtbl.zt_shift); 577*bf26014cSMatthew Ahrens int err = zap_idx_to_blk(zap, idx, &blk); 578ea8dc4b6Seschrock if (err != 0) 579ea8dc4b6Seschrock return (err); 580ea8dc4b6Seschrock err = zap_get_leaf_byblk(zap, blk, tx, lt, lp); 581fa9e4066Sahrens 582c1379625SJustin T. Gibbs ASSERT(err || 583c1379625SJustin T. Gibbs ZAP_HASH_IDX(h, zap_leaf_phys(*lp)->l_hdr.lh_prefix_len) == 584c1379625SJustin T. Gibbs zap_leaf_phys(*lp)->l_hdr.lh_prefix); 585ea8dc4b6Seschrock return (err); 586fa9e4066Sahrens } 587fa9e4066Sahrens 588ea8dc4b6Seschrock static int 589ae972795SMatthew Ahrens zap_expand_leaf(zap_name_t *zn, zap_leaf_t *l, 590ae972795SMatthew Ahrens void *tag, dmu_tx_t *tx, zap_leaf_t **lp) 591fa9e4066Sahrens { 592ad860c82Sbonwick zap_t *zap = zn->zn_zap; 593ad860c82Sbonwick uint64_t hash = zn->zn_hash; 594*bf26014cSMatthew Ahrens int err; 595c1379625SJustin T. Gibbs int old_prefix_len = zap_leaf_phys(l)->l_hdr.lh_prefix_len; 596fa9e4066Sahrens 597c1379625SJustin T. Gibbs ASSERT3U(old_prefix_len, <=, zap_f_phys(zap)->zap_ptrtbl.zt_shift); 598fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 599fa9e4066Sahrens 60066328dd3Sahrens ASSERT3U(ZAP_HASH_IDX(hash, old_prefix_len), ==, 601c1379625SJustin T. Gibbs zap_leaf_phys(l)->l_hdr.lh_prefix); 602fa9e4066Sahrens 60366328dd3Sahrens if (zap_tryupgradedir(zap, tx) == 0 || 604c1379625SJustin T. Gibbs old_prefix_len == zap_f_phys(zap)->zap_ptrtbl.zt_shift) { 60566328dd3Sahrens /* We failed to upgrade, or need to grow the pointer table */ 606fa9e4066Sahrens objset_t *os = zap->zap_objset; 607fa9e4066Sahrens uint64_t object = zap->zap_object; 608fa9e4066Sahrens 609fa9e4066Sahrens zap_put_leaf(l); 610ae972795SMatthew Ahrens zap_unlockdir(zap, tag); 611c5f9e431Sahrens err = zap_lockdir(os, object, tx, RW_WRITER, 612ae972795SMatthew Ahrens FALSE, FALSE, tag, &zn->zn_zap); 613ad860c82Sbonwick zap = zn->zn_zap; 614*bf26014cSMatthew Ahrens if (err != 0) 61566328dd3Sahrens return (err); 616fa9e4066Sahrens ASSERT(!zap->zap_ismicro); 617fa9e4066Sahrens 61866328dd3Sahrens while (old_prefix_len == 619c1379625SJustin T. Gibbs zap_f_phys(zap)->zap_ptrtbl.zt_shift) { 62066328dd3Sahrens err = zap_grow_ptrtbl(zap, tx); 621*bf26014cSMatthew Ahrens if (err != 0) 62266328dd3Sahrens return (err); 62366328dd3Sahrens } 62466328dd3Sahrens 62566328dd3Sahrens err = zap_deref_leaf(zap, hash, tx, RW_WRITER, &l); 626*bf26014cSMatthew Ahrens if (err != 0) 62766328dd3Sahrens return (err); 62866328dd3Sahrens 629c1379625SJustin T. Gibbs if (zap_leaf_phys(l)->l_hdr.lh_prefix_len != old_prefix_len) { 630fa9e4066Sahrens /* it split while our locks were down */ 631ea8dc4b6Seschrock *lp = l; 632ea8dc4b6Seschrock return (0); 633ea8dc4b6Seschrock } 634fa9e4066Sahrens } 635fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 636c1379625SJustin T. Gibbs ASSERT3U(old_prefix_len, <, zap_f_phys(zap)->zap_ptrtbl.zt_shift); 63766328dd3Sahrens ASSERT3U(ZAP_HASH_IDX(hash, old_prefix_len), ==, 638c1379625SJustin T. Gibbs zap_leaf_phys(l)->l_hdr.lh_prefix); 639fa9e4066Sahrens 640*bf26014cSMatthew Ahrens int prefix_diff = zap_f_phys(zap)->zap_ptrtbl.zt_shift - 64166328dd3Sahrens (old_prefix_len + 1); 642*bf26014cSMatthew Ahrens uint64_t sibling = 643*bf26014cSMatthew Ahrens (ZAP_HASH_IDX(hash, old_prefix_len + 1) | 1) << prefix_diff; 644ea8dc4b6Seschrock 645ea8dc4b6Seschrock /* check for i/o errors before doing zap_leaf_split */ 646*bf26014cSMatthew Ahrens for (int i = 0; i < (1ULL << prefix_diff); i++) { 647ea8dc4b6Seschrock uint64_t blk; 648*bf26014cSMatthew Ahrens err = zap_idx_to_blk(zap, sibling + i, &blk); 649*bf26014cSMatthew Ahrens if (err != 0) 650ea8dc4b6Seschrock return (err); 651ea8dc4b6Seschrock ASSERT3U(blk, ==, l->l_blkid); 652ea8dc4b6Seschrock } 653ea8dc4b6Seschrock 654*bf26014cSMatthew Ahrens zap_leaf_t *nl = zap_create_leaf(zap, tx); 655de8267e0Stimh zap_leaf_split(l, nl, zap->zap_normflags != 0); 656ea8dc4b6Seschrock 65766328dd3Sahrens /* set sibling pointers */ 658*bf26014cSMatthew Ahrens for (int i = 0; i < (1ULL << prefix_diff); i++) { 659*bf26014cSMatthew Ahrens err = zap_set_idx_to_blk(zap, sibling + i, nl->l_blkid, tx); 660fb09f5aaSMadhav Suresh ASSERT0(err); /* we checked for i/o errors above */ 661fa9e4066Sahrens } 662fa9e4066Sahrens 663c1379625SJustin T. Gibbs if (hash & (1ULL << (64 - zap_leaf_phys(l)->l_hdr.lh_prefix_len))) { 664fa9e4066Sahrens /* we want the sibling */ 665fa9e4066Sahrens zap_put_leaf(l); 66666328dd3Sahrens *lp = nl; 667fa9e4066Sahrens } else { 668fa9e4066Sahrens zap_put_leaf(nl); 66966328dd3Sahrens *lp = l; 670fa9e4066Sahrens } 671fa9e4066Sahrens 672ea8dc4b6Seschrock return (0); 673fa9e4066Sahrens } 674fa9e4066Sahrens 675fa9e4066Sahrens static void 676ae972795SMatthew Ahrens zap_put_leaf_maybe_grow_ptrtbl(zap_name_t *zn, zap_leaf_t *l, 677ae972795SMatthew Ahrens void *tag, dmu_tx_t *tx) 678fa9e4066Sahrens { 679ad860c82Sbonwick zap_t *zap = zn->zn_zap; 680c1379625SJustin T. Gibbs int shift = zap_f_phys(zap)->zap_ptrtbl.zt_shift; 681c1379625SJustin T. Gibbs int leaffull = (zap_leaf_phys(l)->l_hdr.lh_prefix_len == shift && 682c1379625SJustin T. Gibbs zap_leaf_phys(l)->l_hdr.lh_nfree < ZAP_LEAF_LOW_WATER); 683fa9e4066Sahrens 68466328dd3Sahrens zap_put_leaf(l); 685fa9e4066Sahrens 686c1379625SJustin T. Gibbs if (leaffull || zap_f_phys(zap)->zap_ptrtbl.zt_nextblk) { 68766328dd3Sahrens /* 68866328dd3Sahrens * We are in the middle of growing the pointer table, or 68966328dd3Sahrens * this leaf will soon make us grow it. 69066328dd3Sahrens */ 691fa9e4066Sahrens if (zap_tryupgradedir(zap, tx) == 0) { 692fa9e4066Sahrens objset_t *os = zap->zap_objset; 693fa9e4066Sahrens uint64_t zapobj = zap->zap_object; 694fa9e4066Sahrens 695ae972795SMatthew Ahrens zap_unlockdir(zap, tag); 696*bf26014cSMatthew Ahrens int err = zap_lockdir(os, zapobj, tx, 697ae972795SMatthew Ahrens RW_WRITER, FALSE, FALSE, tag, &zn->zn_zap); 698ad860c82Sbonwick zap = zn->zn_zap; 699*bf26014cSMatthew Ahrens if (err != 0) 70066328dd3Sahrens return; 701fa9e4066Sahrens } 702fa9e4066Sahrens 70366328dd3Sahrens /* could have finished growing while our locks were down */ 704c1379625SJustin T. Gibbs if (zap_f_phys(zap)->zap_ptrtbl.zt_shift == shift) 70566328dd3Sahrens (void) zap_grow_ptrtbl(zap, tx); 706fa9e4066Sahrens } 707fa9e4066Sahrens } 708fa9e4066Sahrens 709fa9e4066Sahrens static int 71092241e0bSTom Erickson fzap_checkname(zap_name_t *zn) 711fa9e4066Sahrens { 712486ae710SMatthew Ahrens if (zn->zn_key_orig_numints * zn->zn_key_intlen > ZAP_MAXNAMELEN) 713be6fd75aSMatthew Ahrens return (SET_ERROR(ENAMETOOLONG)); 71492241e0bSTom Erickson return (0); 71592241e0bSTom Erickson } 71666328dd3Sahrens 71792241e0bSTom Erickson static int 71892241e0bSTom Erickson fzap_checksize(uint64_t integer_size, uint64_t num_integers) 71992241e0bSTom Erickson { 720fa9e4066Sahrens /* Only integer sizes supported by C */ 721fa9e4066Sahrens switch (integer_size) { 722fa9e4066Sahrens case 1: 723fa9e4066Sahrens case 2: 724fa9e4066Sahrens case 4: 725fa9e4066Sahrens case 8: 726fa9e4066Sahrens break; 727fa9e4066Sahrens default: 728be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL)); 729fa9e4066Sahrens } 730fa9e4066Sahrens 73166328dd3Sahrens if (integer_size * num_integers > ZAP_MAXVALUELEN) 73266328dd3Sahrens return (E2BIG); 733fa9e4066Sahrens 734fa9e4066Sahrens return (0); 735fa9e4066Sahrens } 736fa9e4066Sahrens 73792241e0bSTom Erickson static int 73892241e0bSTom Erickson fzap_check(zap_name_t *zn, uint64_t integer_size, uint64_t num_integers) 73992241e0bSTom Erickson { 740*bf26014cSMatthew Ahrens int err = fzap_checkname(zn); 741*bf26014cSMatthew Ahrens if (err != 0) 74292241e0bSTom Erickson return (err); 74392241e0bSTom Erickson return (fzap_checksize(integer_size, num_integers)); 74492241e0bSTom Erickson } 74592241e0bSTom Erickson 746fa9e4066Sahrens /* 747da6c28aaSamw * Routines for manipulating attributes. 748fa9e4066Sahrens */ 749fa9e4066Sahrens int 750da6c28aaSamw fzap_lookup(zap_name_t *zn, 751da6c28aaSamw uint64_t integer_size, uint64_t num_integers, void *buf, 752da6c28aaSamw char *realname, int rn_len, boolean_t *ncp) 753fa9e4066Sahrens { 754fa9e4066Sahrens zap_leaf_t *l; 755fa9e4066Sahrens zap_entry_handle_t zeh; 756fa9e4066Sahrens 757*bf26014cSMatthew Ahrens int err = fzap_checkname(zn); 758*bf26014cSMatthew Ahrens if (err != 0) 759fa9e4066Sahrens return (err); 760fa9e4066Sahrens 761da6c28aaSamw err = zap_deref_leaf(zn->zn_zap, zn->zn_hash, NULL, RW_READER, &l); 762ea8dc4b6Seschrock if (err != 0) 763ea8dc4b6Seschrock return (err); 764da6c28aaSamw err = zap_leaf_lookup(l, zn, &zeh); 765da6c28aaSamw if (err == 0) { 76692241e0bSTom Erickson if ((err = fzap_checksize(integer_size, num_integers)) != 0) { 76792241e0bSTom Erickson zap_put_leaf(l); 76892241e0bSTom Erickson return (err); 76992241e0bSTom Erickson } 77092241e0bSTom Erickson 77166328dd3Sahrens err = zap_entry_read(&zeh, integer_size, num_integers, buf); 772b24ab676SJeff Bonwick (void) zap_entry_read_name(zn->zn_zap, &zeh, rn_len, realname); 773da6c28aaSamw if (ncp) { 774da6c28aaSamw *ncp = zap_entry_normalization_conflict(&zeh, 775da6c28aaSamw zn, NULL, zn->zn_zap); 776da6c28aaSamw } 777da6c28aaSamw } 77866328dd3Sahrens 779fa9e4066Sahrens zap_put_leaf(l); 780fa9e4066Sahrens return (err); 781fa9e4066Sahrens } 782fa9e4066Sahrens 783fa9e4066Sahrens int 784da6c28aaSamw fzap_add_cd(zap_name_t *zn, 785fa9e4066Sahrens uint64_t integer_size, uint64_t num_integers, 786ae972795SMatthew Ahrens const void *val, uint32_t cd, void *tag, dmu_tx_t *tx) 787fa9e4066Sahrens { 788fa9e4066Sahrens zap_leaf_t *l; 789fa9e4066Sahrens int err; 790fa9e4066Sahrens zap_entry_handle_t zeh; 791da6c28aaSamw zap_t *zap = zn->zn_zap; 792fa9e4066Sahrens 793fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 794fa9e4066Sahrens ASSERT(!zap->zap_ismicro); 79592241e0bSTom Erickson ASSERT(fzap_check(zn, integer_size, num_integers) == 0); 796fa9e4066Sahrens 797da6c28aaSamw err = zap_deref_leaf(zap, zn->zn_hash, tx, RW_WRITER, &l); 798ea8dc4b6Seschrock if (err != 0) 799ea8dc4b6Seschrock return (err); 800fa9e4066Sahrens retry: 801da6c28aaSamw err = zap_leaf_lookup(l, zn, &zeh); 802fa9e4066Sahrens if (err == 0) { 803be6fd75aSMatthew Ahrens err = SET_ERROR(EEXIST); 804fa9e4066Sahrens goto out; 805fa9e4066Sahrens } 806ea8dc4b6Seschrock if (err != ENOENT) 807ea8dc4b6Seschrock goto out; 808fa9e4066Sahrens 809b24ab676SJeff Bonwick err = zap_entry_create(l, zn, cd, 810fa9e4066Sahrens integer_size, num_integers, val, &zeh); 811fa9e4066Sahrens 812fa9e4066Sahrens if (err == 0) { 813fa9e4066Sahrens zap_increment_num_entries(zap, 1, tx); 814fa9e4066Sahrens } else if (err == EAGAIN) { 815ae972795SMatthew Ahrens err = zap_expand_leaf(zn, l, tag, tx, &l); 816ad860c82Sbonwick zap = zn->zn_zap; /* zap_expand_leaf() may change zap */ 81766328dd3Sahrens if (err == 0) 81866328dd3Sahrens goto retry; 819fa9e4066Sahrens } 820fa9e4066Sahrens 821fa9e4066Sahrens out: 822ad860c82Sbonwick if (zap != NULL) 823ae972795SMatthew Ahrens zap_put_leaf_maybe_grow_ptrtbl(zn, l, tag, tx); 824fa9e4066Sahrens return (err); 825fa9e4066Sahrens } 826fa9e4066Sahrens 827fa9e4066Sahrens int 828da6c28aaSamw fzap_add(zap_name_t *zn, 829fa9e4066Sahrens uint64_t integer_size, uint64_t num_integers, 830ae972795SMatthew Ahrens const void *val, void *tag, dmu_tx_t *tx) 831fa9e4066Sahrens { 83292241e0bSTom Erickson int err = fzap_check(zn, integer_size, num_integers); 833fa9e4066Sahrens if (err != 0) 834fa9e4066Sahrens return (err); 835fa9e4066Sahrens 836da6c28aaSamw return (fzap_add_cd(zn, integer_size, num_integers, 837ae972795SMatthew Ahrens val, ZAP_NEED_CD, tag, tx)); 838fa9e4066Sahrens } 839fa9e4066Sahrens 840fa9e4066Sahrens int 841da6c28aaSamw fzap_update(zap_name_t *zn, 842ae972795SMatthew Ahrens int integer_size, uint64_t num_integers, const void *val, 843ae972795SMatthew Ahrens void *tag, dmu_tx_t *tx) 844fa9e4066Sahrens { 845fa9e4066Sahrens zap_leaf_t *l; 846*bf26014cSMatthew Ahrens int err; 847*bf26014cSMatthew Ahrens boolean_t create; 848fa9e4066Sahrens zap_entry_handle_t zeh; 849da6c28aaSamw zap_t *zap = zn->zn_zap; 850fa9e4066Sahrens 851fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 85292241e0bSTom Erickson err = fzap_check(zn, integer_size, num_integers); 853fa9e4066Sahrens if (err != 0) 854fa9e4066Sahrens return (err); 855fa9e4066Sahrens 856da6c28aaSamw err = zap_deref_leaf(zap, zn->zn_hash, tx, RW_WRITER, &l); 857ea8dc4b6Seschrock if (err != 0) 858ea8dc4b6Seschrock return (err); 859fa9e4066Sahrens retry: 860da6c28aaSamw err = zap_leaf_lookup(l, zn, &zeh); 861fa9e4066Sahrens create = (err == ENOENT); 862fa9e4066Sahrens ASSERT(err == 0 || err == ENOENT); 863fa9e4066Sahrens 864fa9e4066Sahrens if (create) { 865b24ab676SJeff Bonwick err = zap_entry_create(l, zn, ZAP_NEED_CD, 866b24ab676SJeff Bonwick integer_size, num_integers, val, &zeh); 867fa9e4066Sahrens if (err == 0) 868fa9e4066Sahrens zap_increment_num_entries(zap, 1, tx); 869fa9e4066Sahrens } else { 870fa9e4066Sahrens err = zap_entry_update(&zeh, integer_size, num_integers, val); 871fa9e4066Sahrens } 872fa9e4066Sahrens 873fa9e4066Sahrens if (err == EAGAIN) { 874ae972795SMatthew Ahrens err = zap_expand_leaf(zn, l, tag, tx, &l); 875ad860c82Sbonwick zap = zn->zn_zap; /* zap_expand_leaf() may change zap */ 87666328dd3Sahrens if (err == 0) 87766328dd3Sahrens goto retry; 878fa9e4066Sahrens } 879fa9e4066Sahrens 880ad860c82Sbonwick if (zap != NULL) 881ae972795SMatthew Ahrens zap_put_leaf_maybe_grow_ptrtbl(zn, l, tag, tx); 882fa9e4066Sahrens return (err); 883fa9e4066Sahrens } 884fa9e4066Sahrens 885fa9e4066Sahrens int 886da6c28aaSamw fzap_length(zap_name_t *zn, 887fa9e4066Sahrens uint64_t *integer_size, uint64_t *num_integers) 888fa9e4066Sahrens { 889fa9e4066Sahrens zap_leaf_t *l; 890fa9e4066Sahrens int err; 891fa9e4066Sahrens zap_entry_handle_t zeh; 892fa9e4066Sahrens 893da6c28aaSamw err = zap_deref_leaf(zn->zn_zap, zn->zn_hash, NULL, RW_READER, &l); 894ea8dc4b6Seschrock if (err != 0) 895ea8dc4b6Seschrock return (err); 896da6c28aaSamw err = zap_leaf_lookup(l, zn, &zeh); 897fa9e4066Sahrens if (err != 0) 898fa9e4066Sahrens goto out; 899fa9e4066Sahrens 900*bf26014cSMatthew Ahrens if (integer_size != 0) 901fa9e4066Sahrens *integer_size = zeh.zeh_integer_size; 902*bf26014cSMatthew Ahrens if (num_integers != 0) 903fa9e4066Sahrens *num_integers = zeh.zeh_num_integers; 904fa9e4066Sahrens out: 905fa9e4066Sahrens zap_put_leaf(l); 906fa9e4066Sahrens return (err); 907fa9e4066Sahrens } 908fa9e4066Sahrens 909fa9e4066Sahrens int 910da6c28aaSamw fzap_remove(zap_name_t *zn, dmu_tx_t *tx) 911fa9e4066Sahrens { 912fa9e4066Sahrens zap_leaf_t *l; 913fa9e4066Sahrens int err; 914fa9e4066Sahrens zap_entry_handle_t zeh; 915fa9e4066Sahrens 916da6c28aaSamw err = zap_deref_leaf(zn->zn_zap, zn->zn_hash, tx, RW_WRITER, &l); 917ea8dc4b6Seschrock if (err != 0) 918ea8dc4b6Seschrock return (err); 919da6c28aaSamw err = zap_leaf_lookup(l, zn, &zeh); 920fa9e4066Sahrens if (err == 0) { 921fa9e4066Sahrens zap_entry_remove(&zeh); 922da6c28aaSamw zap_increment_num_entries(zn->zn_zap, -1, tx); 923fa9e4066Sahrens } 924fa9e4066Sahrens zap_put_leaf(l); 925fa9e4066Sahrens return (err); 926fa9e4066Sahrens } 927fa9e4066Sahrens 928c7cd2421SGeorge Wilson void 929c7cd2421SGeorge Wilson fzap_prefetch(zap_name_t *zn) 930c7cd2421SGeorge Wilson { 931*bf26014cSMatthew Ahrens uint64_t blk; 932c7cd2421SGeorge Wilson zap_t *zap = zn->zn_zap; 933c7cd2421SGeorge Wilson 934*bf26014cSMatthew Ahrens uint64_t idx = ZAP_HASH_IDX(zn->zn_hash, 935c1379625SJustin T. Gibbs zap_f_phys(zap)->zap_ptrtbl.zt_shift); 936c7cd2421SGeorge Wilson if (zap_idx_to_blk(zap, idx, &blk) != 0) 937c7cd2421SGeorge Wilson return; 938*bf26014cSMatthew Ahrens int bs = FZAP_BLOCK_SHIFT(zap); 939a2cdcdd2SPaul Dagnelie dmu_prefetch(zap->zap_objset, zap->zap_object, 0, blk << bs, 1 << bs, 940a2cdcdd2SPaul Dagnelie ZIO_PRIORITY_SYNC_READ); 941c7cd2421SGeorge Wilson } 942c7cd2421SGeorge Wilson 943088f3894Sahrens /* 944088f3894Sahrens * Helper functions for consumers. 945088f3894Sahrens */ 946088f3894Sahrens 947ad135b5dSChristopher Siden uint64_t 948ad135b5dSChristopher Siden zap_create_link(objset_t *os, dmu_object_type_t ot, uint64_t parent_obj, 949ad135b5dSChristopher Siden const char *name, dmu_tx_t *tx) 950ad135b5dSChristopher Siden { 951*bf26014cSMatthew Ahrens uint64_t new_obj = zap_create(os, ot, DMU_OT_NONE, 0, tx); 952*bf26014cSMatthew Ahrens VERIFY(new_obj != 0); 953215198a6SJoe Stein VERIFY0(zap_add(os, parent_obj, name, sizeof (uint64_t), 1, &new_obj, 954215198a6SJoe Stein tx)); 955ad135b5dSChristopher Siden 956ad135b5dSChristopher Siden return (new_obj); 957ad135b5dSChristopher Siden } 958ad135b5dSChristopher Siden 959fa9e4066Sahrens int 960e7437265Sahrens zap_value_search(objset_t *os, uint64_t zapobj, uint64_t value, uint64_t mask, 961e7437265Sahrens char *name) 962fa9e4066Sahrens { 963fa9e4066Sahrens zap_cursor_t zc; 964fa9e4066Sahrens int err; 965fa9e4066Sahrens 966e7437265Sahrens if (mask == 0) 967e7437265Sahrens mask = -1ULL; 968e7437265Sahrens 969*bf26014cSMatthew Ahrens zap_attribute_t *za = kmem_alloc(sizeof (*za), KM_SLEEP); 970fa9e4066Sahrens for (zap_cursor_init(&zc, os, zapobj); 971fa9e4066Sahrens (err = zap_cursor_retrieve(&zc, za)) == 0; 972fa9e4066Sahrens zap_cursor_advance(&zc)) { 973e7437265Sahrens if ((za->za_first_integer & mask) == (value & mask)) { 974fa9e4066Sahrens (void) strcpy(name, za->za_name); 975fa9e4066Sahrens break; 976fa9e4066Sahrens } 977fa9e4066Sahrens } 97887e5029aSahrens zap_cursor_fini(&zc); 979*bf26014cSMatthew Ahrens kmem_free(za, sizeof (*za)); 980fa9e4066Sahrens return (err); 981fa9e4066Sahrens } 982fa9e4066Sahrens 983088f3894Sahrens int 984088f3894Sahrens zap_join(objset_t *os, uint64_t fromobj, uint64_t intoobj, dmu_tx_t *tx) 985088f3894Sahrens { 986088f3894Sahrens zap_cursor_t zc; 987*bf26014cSMatthew Ahrens int err = 0; 988088f3894Sahrens 989*bf26014cSMatthew Ahrens zap_attribute_t *za = kmem_alloc(sizeof (*za), KM_SLEEP); 990088f3894Sahrens for (zap_cursor_init(&zc, os, fromobj); 991*bf26014cSMatthew Ahrens zap_cursor_retrieve(&zc, za) == 0; 992088f3894Sahrens (void) zap_cursor_advance(&zc)) { 993*bf26014cSMatthew Ahrens if (za->za_integer_length != 8 || za->za_num_integers != 1) { 994b287be1bSWill Andrews err = SET_ERROR(EINVAL); 995b287be1bSWill Andrews break; 996b287be1bSWill Andrews } 997*bf26014cSMatthew Ahrens err = zap_add(os, intoobj, za->za_name, 998*bf26014cSMatthew Ahrens 8, 1, &za->za_first_integer, tx); 999*bf26014cSMatthew Ahrens if (err != 0) 1000b287be1bSWill Andrews break; 1001088f3894Sahrens } 1002088f3894Sahrens zap_cursor_fini(&zc); 1003*bf26014cSMatthew Ahrens kmem_free(za, sizeof (*za)); 1004b287be1bSWill Andrews return (err); 1005088f3894Sahrens } 1006088f3894Sahrens 10073f9d6ad7SLin Ling int 10083f9d6ad7SLin Ling zap_join_key(objset_t *os, uint64_t fromobj, uint64_t intoobj, 10093f9d6ad7SLin Ling uint64_t value, dmu_tx_t *tx) 10103f9d6ad7SLin Ling { 10113f9d6ad7SLin Ling zap_cursor_t zc; 1012*bf26014cSMatthew Ahrens int err = 0; 10133f9d6ad7SLin Ling 1014*bf26014cSMatthew Ahrens zap_attribute_t *za = kmem_alloc(sizeof (*za), KM_SLEEP); 10153f9d6ad7SLin Ling for (zap_cursor_init(&zc, os, fromobj); 1016*bf26014cSMatthew Ahrens zap_cursor_retrieve(&zc, za) == 0; 10173f9d6ad7SLin Ling (void) zap_cursor_advance(&zc)) { 1018*bf26014cSMatthew Ahrens if (za->za_integer_length != 8 || za->za_num_integers != 1) { 1019b287be1bSWill Andrews err = SET_ERROR(EINVAL); 1020b287be1bSWill Andrews break; 1021b287be1bSWill Andrews } 1022*bf26014cSMatthew Ahrens err = zap_add(os, intoobj, za->za_name, 10233f9d6ad7SLin Ling 8, 1, &value, tx); 1024*bf26014cSMatthew Ahrens if (err != 0) 1025b287be1bSWill Andrews break; 10263f9d6ad7SLin Ling } 10273f9d6ad7SLin Ling zap_cursor_fini(&zc); 1028*bf26014cSMatthew Ahrens kmem_free(za, sizeof (*za)); 1029b287be1bSWill Andrews return (err); 10303f9d6ad7SLin Ling } 10313f9d6ad7SLin Ling 10323f9d6ad7SLin Ling int 10333f9d6ad7SLin Ling zap_join_increment(objset_t *os, uint64_t fromobj, uint64_t intoobj, 10343f9d6ad7SLin Ling dmu_tx_t *tx) 10353f9d6ad7SLin Ling { 10363f9d6ad7SLin Ling zap_cursor_t zc; 1037*bf26014cSMatthew Ahrens int err = 0; 10383f9d6ad7SLin Ling 1039*bf26014cSMatthew Ahrens zap_attribute_t *za = kmem_alloc(sizeof (*za), KM_SLEEP); 10403f9d6ad7SLin Ling for (zap_cursor_init(&zc, os, fromobj); 1041*bf26014cSMatthew Ahrens zap_cursor_retrieve(&zc, za) == 0; 10423f9d6ad7SLin Ling (void) zap_cursor_advance(&zc)) { 10433f9d6ad7SLin Ling uint64_t delta = 0; 10443f9d6ad7SLin Ling 1045*bf26014cSMatthew Ahrens if (za->za_integer_length != 8 || za->za_num_integers != 1) { 1046b287be1bSWill Andrews err = SET_ERROR(EINVAL); 1047b287be1bSWill Andrews break; 1048b287be1bSWill Andrews } 10493f9d6ad7SLin Ling 1050*bf26014cSMatthew Ahrens err = zap_lookup(os, intoobj, za->za_name, 8, 1, &delta); 10513f9d6ad7SLin Ling if (err != 0 && err != ENOENT) 1052b287be1bSWill Andrews break; 1053*bf26014cSMatthew Ahrens delta += za->za_first_integer; 1054*bf26014cSMatthew Ahrens err = zap_update(os, intoobj, za->za_name, 8, 1, &delta, tx); 1055*bf26014cSMatthew Ahrens if (err != 0) 1056b287be1bSWill Andrews break; 10573f9d6ad7SLin Ling } 10583f9d6ad7SLin Ling zap_cursor_fini(&zc); 1059*bf26014cSMatthew Ahrens kmem_free(za, sizeof (*za)); 1060b287be1bSWill Andrews return (err); 10613f9d6ad7SLin Ling } 10623f9d6ad7SLin Ling 1063088f3894Sahrens int 1064088f3894Sahrens zap_add_int(objset_t *os, uint64_t obj, uint64_t value, dmu_tx_t *tx) 1065088f3894Sahrens { 1066088f3894Sahrens char name[20]; 1067088f3894Sahrens 1068088f3894Sahrens (void) snprintf(name, sizeof (name), "%llx", (longlong_t)value); 1069088f3894Sahrens return (zap_add(os, obj, name, 8, 1, &value, tx)); 1070088f3894Sahrens } 1071088f3894Sahrens 1072088f3894Sahrens int 1073088f3894Sahrens zap_remove_int(objset_t *os, uint64_t obj, uint64_t value, dmu_tx_t *tx) 1074088f3894Sahrens { 1075088f3894Sahrens char name[20]; 1076088f3894Sahrens 1077088f3894Sahrens (void) snprintf(name, sizeof (name), "%llx", (longlong_t)value); 1078088f3894Sahrens return (zap_remove(os, obj, name, tx)); 1079088f3894Sahrens } 1080088f3894Sahrens 1081088f3894Sahrens int 1082088f3894Sahrens zap_lookup_int(objset_t *os, uint64_t obj, uint64_t value) 1083088f3894Sahrens { 1084088f3894Sahrens char name[20]; 1085088f3894Sahrens 1086088f3894Sahrens (void) snprintf(name, sizeof (name), "%llx", (longlong_t)value); 1087088f3894Sahrens return (zap_lookup(os, obj, name, 8, 1, &value)); 1088088f3894Sahrens } 1089fa9e4066Sahrens 10909966ca11SMatthew Ahrens int 10913f9d6ad7SLin Ling zap_add_int_key(objset_t *os, uint64_t obj, 10923f9d6ad7SLin Ling uint64_t key, uint64_t value, dmu_tx_t *tx) 10933f9d6ad7SLin Ling { 10943f9d6ad7SLin Ling char name[20]; 10953f9d6ad7SLin Ling 10963f9d6ad7SLin Ling (void) snprintf(name, sizeof (name), "%llx", (longlong_t)key); 10973f9d6ad7SLin Ling return (zap_add(os, obj, name, 8, 1, &value, tx)); 10983f9d6ad7SLin Ling } 10993f9d6ad7SLin Ling 1100f1745736SMatthew Ahrens int 1101f1745736SMatthew Ahrens zap_update_int_key(objset_t *os, uint64_t obj, 1102f1745736SMatthew Ahrens uint64_t key, uint64_t value, dmu_tx_t *tx) 1103f1745736SMatthew Ahrens { 1104f1745736SMatthew Ahrens char name[20]; 1105f1745736SMatthew Ahrens 1106f1745736SMatthew Ahrens (void) snprintf(name, sizeof (name), "%llx", (longlong_t)key); 1107f1745736SMatthew Ahrens return (zap_update(os, obj, name, 8, 1, &value, tx)); 1108f1745736SMatthew Ahrens } 1109f1745736SMatthew Ahrens 11103f9d6ad7SLin Ling int 11113f9d6ad7SLin Ling zap_lookup_int_key(objset_t *os, uint64_t obj, uint64_t key, uint64_t *valuep) 11129966ca11SMatthew Ahrens { 11139966ca11SMatthew Ahrens char name[20]; 11143f9d6ad7SLin Ling 11153f9d6ad7SLin Ling (void) snprintf(name, sizeof (name), "%llx", (longlong_t)key); 11163f9d6ad7SLin Ling return (zap_lookup(os, obj, name, 8, 1, valuep)); 11173f9d6ad7SLin Ling } 11183f9d6ad7SLin Ling 11193f9d6ad7SLin Ling int 11203f9d6ad7SLin Ling zap_increment(objset_t *os, uint64_t obj, const char *name, int64_t delta, 11213f9d6ad7SLin Ling dmu_tx_t *tx) 11223f9d6ad7SLin Ling { 11239966ca11SMatthew Ahrens uint64_t value = 0; 11249966ca11SMatthew Ahrens 11259966ca11SMatthew Ahrens if (delta == 0) 11269966ca11SMatthew Ahrens return (0); 11279966ca11SMatthew Ahrens 1128*bf26014cSMatthew Ahrens int err = zap_lookup(os, obj, name, 8, 1, &value); 11299966ca11SMatthew Ahrens if (err != 0 && err != ENOENT) 11309966ca11SMatthew Ahrens return (err); 11319966ca11SMatthew Ahrens value += delta; 11329966ca11SMatthew Ahrens if (value == 0) 11339966ca11SMatthew Ahrens err = zap_remove(os, obj, name, tx); 11349966ca11SMatthew Ahrens else 11359966ca11SMatthew Ahrens err = zap_update(os, obj, name, 8, 1, &value, tx); 11369966ca11SMatthew Ahrens return (err); 11379966ca11SMatthew Ahrens } 11389966ca11SMatthew Ahrens 11393f9d6ad7SLin Ling int 11403f9d6ad7SLin Ling zap_increment_int(objset_t *os, uint64_t obj, uint64_t key, int64_t delta, 11413f9d6ad7SLin Ling dmu_tx_t *tx) 11423f9d6ad7SLin Ling { 11433f9d6ad7SLin Ling char name[20]; 11443f9d6ad7SLin Ling 11453f9d6ad7SLin Ling (void) snprintf(name, sizeof (name), "%llx", (longlong_t)key); 11463f9d6ad7SLin Ling return (zap_increment(os, obj, name, delta, tx)); 11473f9d6ad7SLin Ling } 11489966ca11SMatthew Ahrens 1149fa9e4066Sahrens /* 1150fa9e4066Sahrens * Routines for iterating over the attributes. 1151fa9e4066Sahrens */ 1152fa9e4066Sahrens 1153fa9e4066Sahrens int 1154fa9e4066Sahrens fzap_cursor_retrieve(zap_t *zap, zap_cursor_t *zc, zap_attribute_t *za) 1155fa9e4066Sahrens { 1156fa9e4066Sahrens int err = ENOENT; 1157fa9e4066Sahrens zap_entry_handle_t zeh; 1158fa9e4066Sahrens zap_leaf_t *l; 1159fa9e4066Sahrens 1160fa9e4066Sahrens /* retrieve the next entry at or after zc_hash/zc_cd */ 1161fa9e4066Sahrens /* if no entry, return ENOENT */ 1162fa9e4066Sahrens 116387e5029aSahrens if (zc->zc_leaf && 116466328dd3Sahrens (ZAP_HASH_IDX(zc->zc_hash, 1165c1379625SJustin T. Gibbs zap_leaf_phys(zc->zc_leaf)->l_hdr.lh_prefix_len) != 1166c1379625SJustin T. Gibbs zap_leaf_phys(zc->zc_leaf)->l_hdr.lh_prefix)) { 116787e5029aSahrens rw_enter(&zc->zc_leaf->l_rwlock, RW_READER); 116887e5029aSahrens zap_put_leaf(zc->zc_leaf); 116987e5029aSahrens zc->zc_leaf = NULL; 117087e5029aSahrens } 117187e5029aSahrens 1172fa9e4066Sahrens again: 117387e5029aSahrens if (zc->zc_leaf == NULL) { 1174ea8dc4b6Seschrock err = zap_deref_leaf(zap, zc->zc_hash, NULL, RW_READER, 1175ea8dc4b6Seschrock &zc->zc_leaf); 1176ea8dc4b6Seschrock if (err != 0) 1177ea8dc4b6Seschrock return (err); 117887e5029aSahrens } else { 117987e5029aSahrens rw_enter(&zc->zc_leaf->l_rwlock, RW_READER); 118087e5029aSahrens } 118187e5029aSahrens l = zc->zc_leaf; 118287e5029aSahrens 1183fa9e4066Sahrens err = zap_leaf_lookup_closest(l, zc->zc_hash, zc->zc_cd, &zeh); 1184fa9e4066Sahrens 1185fa9e4066Sahrens if (err == ENOENT) { 118666328dd3Sahrens uint64_t nocare = 1187c1379625SJustin T. Gibbs (1ULL << (64 - zap_leaf_phys(l)->l_hdr.lh_prefix_len)) - 1; 1188fa9e4066Sahrens zc->zc_hash = (zc->zc_hash & ~nocare) + nocare + 1; 1189fa9e4066Sahrens zc->zc_cd = 0; 1190c1379625SJustin T. Gibbs if (zap_leaf_phys(l)->l_hdr.lh_prefix_len == 0 || 1191c1379625SJustin T. Gibbs zc->zc_hash == 0) { 1192fa9e4066Sahrens zc->zc_hash = -1ULL; 1193fa9e4066Sahrens } else { 119487e5029aSahrens zap_put_leaf(zc->zc_leaf); 119587e5029aSahrens zc->zc_leaf = NULL; 1196fa9e4066Sahrens goto again; 1197fa9e4066Sahrens } 1198fa9e4066Sahrens } 1199fa9e4066Sahrens 1200fa9e4066Sahrens if (err == 0) { 1201fa9e4066Sahrens zc->zc_hash = zeh.zeh_hash; 1202fa9e4066Sahrens zc->zc_cd = zeh.zeh_cd; 1203fa9e4066Sahrens za->za_integer_length = zeh.zeh_integer_size; 1204fa9e4066Sahrens za->za_num_integers = zeh.zeh_num_integers; 1205fa9e4066Sahrens if (zeh.zeh_num_integers == 0) { 1206fa9e4066Sahrens za->za_first_integer = 0; 1207fa9e4066Sahrens } else { 1208fa9e4066Sahrens err = zap_entry_read(&zeh, 8, 1, &za->za_first_integer); 1209fa9e4066Sahrens ASSERT(err == 0 || err == EOVERFLOW); 1210fa9e4066Sahrens } 1211b24ab676SJeff Bonwick err = zap_entry_read_name(zap, &zeh, 1212fa9e4066Sahrens sizeof (za->za_name), za->za_name); 1213fa9e4066Sahrens ASSERT(err == 0); 1214da6c28aaSamw 1215da6c28aaSamw za->za_normalization_conflict = 1216da6c28aaSamw zap_entry_normalization_conflict(&zeh, 1217da6c28aaSamw NULL, za->za_name, zap); 1218fa9e4066Sahrens } 121987e5029aSahrens rw_exit(&zc->zc_leaf->l_rwlock); 1220fa9e4066Sahrens return (err); 1221fa9e4066Sahrens } 1222fa9e4066Sahrens 1223fa9e4066Sahrens static void 1224fa9e4066Sahrens zap_stats_ptrtbl(zap_t *zap, uint64_t *tbl, int len, zap_stats_t *zs) 1225fa9e4066Sahrens { 1226fa9e4066Sahrens uint64_t lastblk = 0; 1227fa9e4066Sahrens 1228fa9e4066Sahrens /* 1229fa9e4066Sahrens * NB: if a leaf has more pointers than an entire ptrtbl block 1230fa9e4066Sahrens * can hold, then it'll be accounted for more than once, since 1231fa9e4066Sahrens * we won't have lastblk. 1232fa9e4066Sahrens */ 1233*bf26014cSMatthew Ahrens for (int i = 0; i < len; i++) { 1234fa9e4066Sahrens zap_leaf_t *l; 1235fa9e4066Sahrens 1236fa9e4066Sahrens if (tbl[i] == lastblk) 1237fa9e4066Sahrens continue; 1238fa9e4066Sahrens lastblk = tbl[i]; 1239fa9e4066Sahrens 1240*bf26014cSMatthew Ahrens int err = zap_get_leaf_byblk(zap, tbl[i], NULL, RW_READER, &l); 1241ea8dc4b6Seschrock if (err == 0) { 124266328dd3Sahrens zap_leaf_stats(zap, l, zs); 1243ea8dc4b6Seschrock zap_put_leaf(l); 1244ea8dc4b6Seschrock } 1245fa9e4066Sahrens } 1246fa9e4066Sahrens } 1247fa9e4066Sahrens 1248fa9e4066Sahrens void 1249fa9e4066Sahrens fzap_get_stats(zap_t *zap, zap_stats_t *zs) 1250fa9e4066Sahrens { 1251f65e61c0Sahrens int bs = FZAP_BLOCK_SHIFT(zap); 1252f65e61c0Sahrens zs->zs_blocksize = 1ULL << bs; 12538248818dSnd 12548248818dSnd /* 12558248818dSnd * Set zap_phys_t fields 12568248818dSnd */ 1257c1379625SJustin T. Gibbs zs->zs_num_leafs = zap_f_phys(zap)->zap_num_leafs; 1258c1379625SJustin T. Gibbs zs->zs_num_entries = zap_f_phys(zap)->zap_num_entries; 1259c1379625SJustin T. Gibbs zs->zs_num_blocks = zap_f_phys(zap)->zap_freeblk; 1260c1379625SJustin T. Gibbs zs->zs_block_type = zap_f_phys(zap)->zap_block_type; 1261c1379625SJustin T. Gibbs zs->zs_magic = zap_f_phys(zap)->zap_magic; 1262c1379625SJustin T. Gibbs zs->zs_salt = zap_f_phys(zap)->zap_salt; 12638248818dSnd 12648248818dSnd /* 12658248818dSnd * Set zap_ptrtbl fields 12668248818dSnd */ 1267c1379625SJustin T. Gibbs zs->zs_ptrtbl_len = 1ULL << zap_f_phys(zap)->zap_ptrtbl.zt_shift; 1268c1379625SJustin T. Gibbs zs->zs_ptrtbl_nextblk = zap_f_phys(zap)->zap_ptrtbl.zt_nextblk; 12698248818dSnd zs->zs_ptrtbl_blks_copied = 1270c1379625SJustin T. Gibbs zap_f_phys(zap)->zap_ptrtbl.zt_blks_copied; 1271c1379625SJustin T. Gibbs zs->zs_ptrtbl_zt_blk = zap_f_phys(zap)->zap_ptrtbl.zt_blk; 1272c1379625SJustin T. Gibbs zs->zs_ptrtbl_zt_numblks = zap_f_phys(zap)->zap_ptrtbl.zt_numblks; 1273c1379625SJustin T. Gibbs zs->zs_ptrtbl_zt_shift = zap_f_phys(zap)->zap_ptrtbl.zt_shift; 1274fa9e4066Sahrens 1275c1379625SJustin T. Gibbs if (zap_f_phys(zap)->zap_ptrtbl.zt_numblks == 0) { 1276fa9e4066Sahrens /* the ptrtbl is entirely in the header block. */ 1277f65e61c0Sahrens zap_stats_ptrtbl(zap, &ZAP_EMBEDDED_PTRTBL_ENT(zap, 0), 1278f65e61c0Sahrens 1 << ZAP_EMBEDDED_PTRTBL_SHIFT(zap), zs); 1279fa9e4066Sahrens } else { 1280a2cdcdd2SPaul Dagnelie dmu_prefetch(zap->zap_objset, zap->zap_object, 0, 1281c1379625SJustin T. Gibbs zap_f_phys(zap)->zap_ptrtbl.zt_blk << bs, 1282a2cdcdd2SPaul Dagnelie zap_f_phys(zap)->zap_ptrtbl.zt_numblks << bs, 1283a2cdcdd2SPaul Dagnelie ZIO_PRIORITY_SYNC_READ); 1284fa9e4066Sahrens 1285*bf26014cSMatthew Ahrens for (int b = 0; b < zap_f_phys(zap)->zap_ptrtbl.zt_numblks; 1286fa9e4066Sahrens b++) { 1287fa9e4066Sahrens dmu_buf_t *db; 1288ea8dc4b6Seschrock int err; 1289ea8dc4b6Seschrock 1290ea8dc4b6Seschrock err = dmu_buf_hold(zap->zap_objset, zap->zap_object, 1291c1379625SJustin T. Gibbs (zap_f_phys(zap)->zap_ptrtbl.zt_blk + b) << bs, 129247cb52daSJeff Bonwick FTAG, &db, DMU_READ_NO_PREFETCH); 1293ea8dc4b6Seschrock if (err == 0) { 1294ea8dc4b6Seschrock zap_stats_ptrtbl(zap, db->db_data, 1295ea8dc4b6Seschrock 1<<(bs-3), zs); 1296ea8dc4b6Seschrock dmu_buf_rele(db, FTAG); 1297ea8dc4b6Seschrock } 1298fa9e4066Sahrens } 1299fa9e4066Sahrens } 1300fa9e4066Sahrens } 1301