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*52abb70eSMatthew Ahrens * Copyright (c) 2012, 2018 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 52*52abb70eSMatthew Ahrens /* 53*52abb70eSMatthew Ahrens * If zap_iterate_prefetch is set, we will prefetch the entire ZAP object 54*52abb70eSMatthew Ahrens * (all leaf blocks) when we start iterating over it. 55*52abb70eSMatthew Ahrens * 56*52abb70eSMatthew Ahrens * For zap_cursor_init(), the callers all intend to iterate through all the 57*52abb70eSMatthew Ahrens * entries. There are a few cases where an error (typically i/o error) could 58*52abb70eSMatthew Ahrens * cause it to bail out early. 59*52abb70eSMatthew Ahrens * 60*52abb70eSMatthew Ahrens * For zap_cursor_init_serialized(), there are callers that do the iteration 61*52abb70eSMatthew Ahrens * outside of ZFS. Typically they would iterate over everything, but we 62*52abb70eSMatthew Ahrens * don't have control of that. E.g. zfs_ioc_snapshot_list_next(), 63*52abb70eSMatthew Ahrens * zcp_snapshots_iter(), and other iterators over things in the MOS - these 64*52abb70eSMatthew Ahrens * are called by /sbin/zfs and channel programs. The other example is 65*52abb70eSMatthew Ahrens * zfs_readdir() which iterates over directory entries for the getdents() 66*52abb70eSMatthew Ahrens * syscall. /sbin/ls iterates to the end (unless it receives a signal), but 67*52abb70eSMatthew Ahrens * userland doesn't have to. 68*52abb70eSMatthew Ahrens * 69*52abb70eSMatthew Ahrens * Given that the ZAP entries aren't returned in a specific order, the only 70*52abb70eSMatthew Ahrens * legitimate use cases for partial iteration would be: 71*52abb70eSMatthew Ahrens * 72*52abb70eSMatthew Ahrens * 1. Pagination: e.g. you only want to display 100 entries at a time, so you 73*52abb70eSMatthew Ahrens * get the first 100 and then wait for the user to hit "next page", which 74*52abb70eSMatthew Ahrens * they may never do). 75*52abb70eSMatthew Ahrens * 76*52abb70eSMatthew Ahrens * 2. You want to know if there are more than X entries, without relying on 77*52abb70eSMatthew Ahrens * the zfs-specific implementation of the directory's st_size (which is 78*52abb70eSMatthew Ahrens * the number of entries). 79*52abb70eSMatthew Ahrens */ 80*52abb70eSMatthew Ahrens boolean_t zap_iterate_prefetch = B_TRUE; 81*52abb70eSMatthew Ahrens 82f65e61c0Sahrens int fzap_default_block_shift = 14; /* 16k blocksize */ 83fa9e4066Sahrens 84c1379625SJustin T. Gibbs extern inline zap_phys_t *zap_f_phys(zap_t *zap); 85c1379625SJustin T. Gibbs 8666328dd3Sahrens static uint64_t zap_allocate_blocks(zap_t *zap, int nblocks); 87fa9e4066Sahrens 88fa9e4066Sahrens void 89fa9e4066Sahrens fzap_byteswap(void *vbuf, size_t size) 90fa9e4066Sahrens { 91bf26014cSMatthew Ahrens uint64_t block_type = *(uint64_t *)vbuf; 92fa9e4066Sahrens 935ad82045Snd if (block_type == ZBT_LEAF || block_type == BSWAP_64(ZBT_LEAF)) 94f65e61c0Sahrens zap_leaf_byteswap(vbuf, size); 955ad82045Snd else { 96fa9e4066Sahrens /* it's a ptrtbl block */ 97f65e61c0Sahrens byteswap_uint64_array(vbuf, size); 98fa9e4066Sahrens } 99fa9e4066Sahrens } 100fa9e4066Sahrens 101fa9e4066Sahrens void 102b24ab676SJeff Bonwick fzap_upgrade(zap_t *zap, dmu_tx_t *tx, zap_flags_t flags) 103fa9e4066Sahrens { 104fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 105fa9e4066Sahrens zap->zap_ismicro = FALSE; 106fa9e4066Sahrens 10740510e8eSJosef 'Jeff' Sipek zap->zap_dbu.dbu_evict_func_sync = zap_evict_sync; 10840510e8eSJosef 'Jeff' Sipek zap->zap_dbu.dbu_evict_func_async = NULL; 109fa9e4066Sahrens 110fa9e4066Sahrens mutex_init(&zap->zap_f.zap_num_entries_mtx, 0, 0, 0); 111bf16b11eSMatthew Ahrens zap->zap_f.zap_block_shift = highbit64(zap->zap_dbuf->db_size) - 1; 112fa9e4066Sahrens 113bf26014cSMatthew Ahrens zap_phys_t *zp = zap_f_phys(zap); 114fa9e4066Sahrens /* 115fa9e4066Sahrens * explicitly zero it since it might be coming from an 116fa9e4066Sahrens * initialized microzap 117fa9e4066Sahrens */ 118f65e61c0Sahrens bzero(zap->zap_dbuf->db_data, zap->zap_dbuf->db_size); 119fa9e4066Sahrens zp->zap_block_type = ZBT_HEADER; 120fa9e4066Sahrens zp->zap_magic = ZAP_MAGIC; 121fa9e4066Sahrens 122f65e61c0Sahrens zp->zap_ptrtbl.zt_shift = ZAP_EMBEDDED_PTRTBL_SHIFT(zap); 123fa9e4066Sahrens 124fa9e4066Sahrens zp->zap_freeblk = 2; /* block 1 will be the first leaf */ 125fa9e4066Sahrens zp->zap_num_leafs = 1; 126fa9e4066Sahrens zp->zap_num_entries = 0; 127fa9e4066Sahrens zp->zap_salt = zap->zap_salt; 128da6c28aaSamw zp->zap_normflags = zap->zap_normflags; 129b24ab676SJeff Bonwick zp->zap_flags = flags; 130fa9e4066Sahrens 131f65e61c0Sahrens /* block 1 will be the first leaf */ 132bf26014cSMatthew Ahrens for (int i = 0; i < (1<<zp->zap_ptrtbl.zt_shift); i++) 133f65e61c0Sahrens ZAP_EMBEDDED_PTRTBL_ENT(zap, i) = 1; 134fa9e4066Sahrens 135fa9e4066Sahrens /* 136fa9e4066Sahrens * set up block 1 - the first leaf 137fa9e4066Sahrens */ 138bf26014cSMatthew Ahrens dmu_buf_t *db; 139bf26014cSMatthew Ahrens VERIFY0(dmu_buf_hold(zap->zap_objset, zap->zap_object, 14047cb52daSJeff Bonwick 1<<FZAP_BLOCK_SHIFT(zap), FTAG, &db, DMU_READ_NO_PREFETCH)); 141fa9e4066Sahrens dmu_buf_will_dirty(db, tx); 142fa9e4066Sahrens 143bf26014cSMatthew Ahrens zap_leaf_t *l = kmem_zalloc(sizeof (zap_leaf_t), KM_SLEEP); 144fa9e4066Sahrens l->l_dbuf = db; 145fa9e4066Sahrens 146de8267e0Stimh zap_leaf_init(l, zp->zap_normflags != 0); 147fa9e4066Sahrens 148fa9e4066Sahrens kmem_free(l, sizeof (zap_leaf_t)); 149ea8dc4b6Seschrock dmu_buf_rele(db, FTAG); 150fa9e4066Sahrens } 151fa9e4066Sahrens 152fa9e4066Sahrens static int 153fa9e4066Sahrens zap_tryupgradedir(zap_t *zap, dmu_tx_t *tx) 154fa9e4066Sahrens { 155fa9e4066Sahrens if (RW_WRITE_HELD(&zap->zap_rwlock)) 156fa9e4066Sahrens return (1); 157fa9e4066Sahrens if (rw_tryupgrade(&zap->zap_rwlock)) { 158fa9e4066Sahrens dmu_buf_will_dirty(zap->zap_dbuf, tx); 159fa9e4066Sahrens return (1); 160fa9e4066Sahrens } 161fa9e4066Sahrens return (0); 162fa9e4066Sahrens } 163fa9e4066Sahrens 164fa9e4066Sahrens /* 165fa9e4066Sahrens * Generic routines for dealing with the pointer & cookie tables. 166fa9e4066Sahrens */ 167fa9e4066Sahrens 16866328dd3Sahrens static int 169fa9e4066Sahrens zap_table_grow(zap_t *zap, zap_table_phys_t *tbl, 170fa9e4066Sahrens void (*transfer_func)(const uint64_t *src, uint64_t *dst, int n), 171fa9e4066Sahrens dmu_tx_t *tx) 172fa9e4066Sahrens { 173bf26014cSMatthew Ahrens uint64_t newblk; 174f65e61c0Sahrens int bs = FZAP_BLOCK_SHIFT(zap); 175f65e61c0Sahrens int hepb = 1<<(bs-4); 176fa9e4066Sahrens /* hepb = half the number of entries in a block */ 177fa9e4066Sahrens 178fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 179fa9e4066Sahrens ASSERT(tbl->zt_blk != 0); 180fa9e4066Sahrens ASSERT(tbl->zt_numblks > 0); 181fa9e4066Sahrens 182fa9e4066Sahrens if (tbl->zt_nextblk != 0) { 183fa9e4066Sahrens newblk = tbl->zt_nextblk; 184fa9e4066Sahrens } else { 18566328dd3Sahrens newblk = zap_allocate_blocks(zap, tbl->zt_numblks * 2); 186fa9e4066Sahrens tbl->zt_nextblk = newblk; 187fb09f5aaSMadhav Suresh ASSERT0(tbl->zt_blks_copied); 188a2cdcdd2SPaul Dagnelie dmu_prefetch(zap->zap_objset, zap->zap_object, 0, 189a2cdcdd2SPaul Dagnelie tbl->zt_blk << bs, tbl->zt_numblks << bs, 190a2cdcdd2SPaul Dagnelie ZIO_PRIORITY_SYNC_READ); 191fa9e4066Sahrens } 192fa9e4066Sahrens 193fa9e4066Sahrens /* 19466328dd3Sahrens * Copy the ptrtbl from the old to new location. 195fa9e4066Sahrens */ 196fa9e4066Sahrens 197bf26014cSMatthew Ahrens uint64_t b = tbl->zt_blks_copied; 198bf26014cSMatthew Ahrens dmu_buf_t *db_old; 199bf26014cSMatthew Ahrens int err = dmu_buf_hold(zap->zap_objset, zap->zap_object, 20047cb52daSJeff Bonwick (tbl->zt_blk + b) << bs, FTAG, &db_old, DMU_READ_NO_PREFETCH); 201bf26014cSMatthew Ahrens if (err != 0) 20266328dd3Sahrens return (err); 203fa9e4066Sahrens 204fa9e4066Sahrens /* first half of entries in old[b] go to new[2*b+0] */ 205bf26014cSMatthew Ahrens dmu_buf_t *db_new; 206bf26014cSMatthew Ahrens VERIFY0(dmu_buf_hold(zap->zap_objset, zap->zap_object, 20747cb52daSJeff Bonwick (newblk + 2*b+0) << bs, FTAG, &db_new, DMU_READ_NO_PREFETCH)); 208fa9e4066Sahrens dmu_buf_will_dirty(db_new, tx); 209fa9e4066Sahrens transfer_func(db_old->db_data, db_new->db_data, hepb); 210ea8dc4b6Seschrock dmu_buf_rele(db_new, FTAG); 211fa9e4066Sahrens 212fa9e4066Sahrens /* second half of entries in old[b] go to new[2*b+1] */ 213bf26014cSMatthew Ahrens VERIFY0(dmu_buf_hold(zap->zap_objset, zap->zap_object, 21447cb52daSJeff Bonwick (newblk + 2*b+1) << bs, FTAG, &db_new, DMU_READ_NO_PREFETCH)); 215fa9e4066Sahrens dmu_buf_will_dirty(db_new, tx); 216fa9e4066Sahrens transfer_func((uint64_t *)db_old->db_data + hepb, 217fa9e4066Sahrens db_new->db_data, hepb); 218ea8dc4b6Seschrock dmu_buf_rele(db_new, FTAG); 219fa9e4066Sahrens 220ea8dc4b6Seschrock dmu_buf_rele(db_old, FTAG); 221fa9e4066Sahrens 222fa9e4066Sahrens tbl->zt_blks_copied++; 223fa9e4066Sahrens 224fa9e4066Sahrens dprintf("copied block %llu of %llu\n", 225fa9e4066Sahrens tbl->zt_blks_copied, tbl->zt_numblks); 226fa9e4066Sahrens 227fa9e4066Sahrens if (tbl->zt_blks_copied == tbl->zt_numblks) { 228ea8dc4b6Seschrock (void) dmu_free_range(zap->zap_objset, zap->zap_object, 229f65e61c0Sahrens tbl->zt_blk << bs, tbl->zt_numblks << bs, tx); 230fa9e4066Sahrens 231fa9e4066Sahrens tbl->zt_blk = newblk; 232fa9e4066Sahrens tbl->zt_numblks *= 2; 233fa9e4066Sahrens tbl->zt_shift++; 234fa9e4066Sahrens tbl->zt_nextblk = 0; 235fa9e4066Sahrens tbl->zt_blks_copied = 0; 236fa9e4066Sahrens 237fa9e4066Sahrens dprintf("finished; numblocks now %llu (%lluk entries)\n", 238fa9e4066Sahrens tbl->zt_numblks, 1<<(tbl->zt_shift-10)); 239fa9e4066Sahrens } 24066328dd3Sahrens 24166328dd3Sahrens return (0); 242fa9e4066Sahrens } 243fa9e4066Sahrens 244ea8dc4b6Seschrock static int 245fa9e4066Sahrens zap_table_store(zap_t *zap, zap_table_phys_t *tbl, uint64_t idx, uint64_t val, 246fa9e4066Sahrens dmu_tx_t *tx) 247fa9e4066Sahrens { 248f65e61c0Sahrens int bs = FZAP_BLOCK_SHIFT(zap); 249fa9e4066Sahrens 250fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 251fa9e4066Sahrens ASSERT(tbl->zt_blk != 0); 252fa9e4066Sahrens 253fa9e4066Sahrens dprintf("storing %llx at index %llx\n", val, idx); 254fa9e4066Sahrens 255bf26014cSMatthew Ahrens uint64_t blk = idx >> (bs-3); 256bf26014cSMatthew Ahrens uint64_t off = idx & ((1<<(bs-3))-1); 257fa9e4066Sahrens 258bf26014cSMatthew Ahrens dmu_buf_t *db; 259bf26014cSMatthew Ahrens int err = dmu_buf_hold(zap->zap_objset, zap->zap_object, 26047cb52daSJeff Bonwick (tbl->zt_blk + blk) << bs, FTAG, &db, DMU_READ_NO_PREFETCH); 261bf26014cSMatthew Ahrens if (err != 0) 262ea8dc4b6Seschrock return (err); 263fa9e4066Sahrens dmu_buf_will_dirty(db, tx); 264fa9e4066Sahrens 265fa9e4066Sahrens if (tbl->zt_nextblk != 0) { 266ea8dc4b6Seschrock uint64_t idx2 = idx * 2; 267ea8dc4b6Seschrock uint64_t blk2 = idx2 >> (bs-3); 268ea8dc4b6Seschrock uint64_t off2 = idx2 & ((1<<(bs-3))-1); 269ea8dc4b6Seschrock dmu_buf_t *db2; 270ea8dc4b6Seschrock 271ea8dc4b6Seschrock err = dmu_buf_hold(zap->zap_objset, zap->zap_object, 27247cb52daSJeff Bonwick (tbl->zt_nextblk + blk2) << bs, FTAG, &db2, 27347cb52daSJeff Bonwick DMU_READ_NO_PREFETCH); 274bf26014cSMatthew Ahrens if (err != 0) { 275ea8dc4b6Seschrock dmu_buf_rele(db, FTAG); 276ea8dc4b6Seschrock return (err); 277ea8dc4b6Seschrock } 278ea8dc4b6Seschrock dmu_buf_will_dirty(db2, tx); 279ea8dc4b6Seschrock ((uint64_t *)db2->db_data)[off2] = val; 280ea8dc4b6Seschrock ((uint64_t *)db2->db_data)[off2+1] = val; 281ea8dc4b6Seschrock dmu_buf_rele(db2, FTAG); 282fa9e4066Sahrens } 283fa9e4066Sahrens 284ea8dc4b6Seschrock ((uint64_t *)db->db_data)[off] = val; 285ea8dc4b6Seschrock dmu_buf_rele(db, FTAG); 286ea8dc4b6Seschrock 287ea8dc4b6Seschrock return (0); 288fa9e4066Sahrens } 289fa9e4066Sahrens 290ea8dc4b6Seschrock static int 291ea8dc4b6Seschrock zap_table_load(zap_t *zap, zap_table_phys_t *tbl, uint64_t idx, uint64_t *valp) 292fa9e4066Sahrens { 293f65e61c0Sahrens int bs = FZAP_BLOCK_SHIFT(zap); 294fa9e4066Sahrens 295fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 296fa9e4066Sahrens 297bf26014cSMatthew Ahrens uint64_t blk = idx >> (bs-3); 298bf26014cSMatthew Ahrens uint64_t off = idx & ((1<<(bs-3))-1); 299fa9e4066Sahrens 30079d72832SMatthew Ahrens /* 30179d72832SMatthew Ahrens * Note: this is equivalent to dmu_buf_hold(), but we use 30279d72832SMatthew Ahrens * _dnode_enter / _by_dnode because it's faster because we don't 30379d72832SMatthew Ahrens * have to hold the dnode. 30479d72832SMatthew Ahrens */ 305bf26014cSMatthew Ahrens dnode_t *dn = dmu_buf_dnode_enter(zap->zap_dbuf); 306bf26014cSMatthew Ahrens dmu_buf_t *db; 307bf26014cSMatthew Ahrens int err = dmu_buf_hold_by_dnode(dn, 30847cb52daSJeff Bonwick (tbl->zt_blk + blk) << bs, FTAG, &db, DMU_READ_NO_PREFETCH); 30979d72832SMatthew Ahrens dmu_buf_dnode_exit(zap->zap_dbuf); 310bf26014cSMatthew Ahrens if (err != 0) 311ea8dc4b6Seschrock return (err); 312ea8dc4b6Seschrock *valp = ((uint64_t *)db->db_data)[off]; 313ea8dc4b6Seschrock dmu_buf_rele(db, FTAG); 314ea8dc4b6Seschrock 315ea8dc4b6Seschrock if (tbl->zt_nextblk != 0) { 316ea8dc4b6Seschrock /* 317ea8dc4b6Seschrock * read the nextblk for the sake of i/o error checking, 318ea8dc4b6Seschrock * so that zap_table_load() will catch errors for 319ea8dc4b6Seschrock * zap_table_store. 320ea8dc4b6Seschrock */ 321ea8dc4b6Seschrock blk = (idx*2) >> (bs-3); 322ea8dc4b6Seschrock 32379d72832SMatthew Ahrens dn = dmu_buf_dnode_enter(zap->zap_dbuf); 32479d72832SMatthew Ahrens err = dmu_buf_hold_by_dnode(dn, 32547cb52daSJeff Bonwick (tbl->zt_nextblk + blk) << bs, FTAG, &db, 32647cb52daSJeff Bonwick DMU_READ_NO_PREFETCH); 32779d72832SMatthew Ahrens dmu_buf_dnode_exit(zap->zap_dbuf); 328b287be1bSWill Andrews if (err == 0) 329b287be1bSWill Andrews dmu_buf_rele(db, FTAG); 330ea8dc4b6Seschrock } 331ea8dc4b6Seschrock return (err); 332fa9e4066Sahrens } 333fa9e4066Sahrens 334fa9e4066Sahrens /* 335fa9e4066Sahrens * Routines for growing the ptrtbl. 336fa9e4066Sahrens */ 337fa9e4066Sahrens 338fa9e4066Sahrens static void 339fa9e4066Sahrens zap_ptrtbl_transfer(const uint64_t *src, uint64_t *dst, int n) 340fa9e4066Sahrens { 341bf26014cSMatthew Ahrens for (int i = 0; i < n; i++) { 342fa9e4066Sahrens uint64_t lb = src[i]; 343bf26014cSMatthew Ahrens dst[2 * i + 0] = lb; 344bf26014cSMatthew Ahrens dst[2 * i + 1] = lb; 345fa9e4066Sahrens } 346fa9e4066Sahrens } 347fa9e4066Sahrens 34866328dd3Sahrens static int 349fa9e4066Sahrens zap_grow_ptrtbl(zap_t *zap, dmu_tx_t *tx) 350fa9e4066Sahrens { 351b24ab676SJeff Bonwick /* 352b24ab676SJeff Bonwick * The pointer table should never use more hash bits than we 353b24ab676SJeff Bonwick * have (otherwise we'd be using useless zero bits to index it). 354b24ab676SJeff Bonwick * If we are within 2 bits of running out, stop growing, since 355b24ab676SJeff Bonwick * this is already an aberrant condition. 356b24ab676SJeff Bonwick */ 357c1379625SJustin T. Gibbs if (zap_f_phys(zap)->zap_ptrtbl.zt_shift >= zap_hashbits(zap) - 2) 358be6fd75aSMatthew Ahrens return (SET_ERROR(ENOSPC)); 359fa9e4066Sahrens 360c1379625SJustin T. Gibbs if (zap_f_phys(zap)->zap_ptrtbl.zt_numblks == 0) { 361fa9e4066Sahrens /* 362f65e61c0Sahrens * We are outgrowing the "embedded" ptrtbl (the one 363f65e61c0Sahrens * stored in the header block). Give it its own entire 364f65e61c0Sahrens * block, which will double the size of the ptrtbl. 365fa9e4066Sahrens */ 366c1379625SJustin T. Gibbs ASSERT3U(zap_f_phys(zap)->zap_ptrtbl.zt_shift, ==, 367f65e61c0Sahrens ZAP_EMBEDDED_PTRTBL_SHIFT(zap)); 368c1379625SJustin T. Gibbs ASSERT0(zap_f_phys(zap)->zap_ptrtbl.zt_blk); 369fa9e4066Sahrens 370bf26014cSMatthew Ahrens uint64_t newblk = zap_allocate_blocks(zap, 1); 371bf26014cSMatthew Ahrens dmu_buf_t *db_new; 372bf26014cSMatthew Ahrens int err = dmu_buf_hold(zap->zap_objset, zap->zap_object, 37347cb52daSJeff Bonwick newblk << FZAP_BLOCK_SHIFT(zap), FTAG, &db_new, 37447cb52daSJeff Bonwick DMU_READ_NO_PREFETCH); 375bf26014cSMatthew Ahrens if (err != 0) 37666328dd3Sahrens return (err); 377fa9e4066Sahrens dmu_buf_will_dirty(db_new, tx); 378f65e61c0Sahrens zap_ptrtbl_transfer(&ZAP_EMBEDDED_PTRTBL_ENT(zap, 0), 379f65e61c0Sahrens db_new->db_data, 1 << ZAP_EMBEDDED_PTRTBL_SHIFT(zap)); 380ea8dc4b6Seschrock dmu_buf_rele(db_new, FTAG); 381fa9e4066Sahrens 382c1379625SJustin T. Gibbs zap_f_phys(zap)->zap_ptrtbl.zt_blk = newblk; 383c1379625SJustin T. Gibbs zap_f_phys(zap)->zap_ptrtbl.zt_numblks = 1; 384c1379625SJustin T. Gibbs zap_f_phys(zap)->zap_ptrtbl.zt_shift++; 385fa9e4066Sahrens 386c1379625SJustin T. Gibbs ASSERT3U(1ULL << zap_f_phys(zap)->zap_ptrtbl.zt_shift, ==, 387c1379625SJustin T. Gibbs zap_f_phys(zap)->zap_ptrtbl.zt_numblks << 388f65e61c0Sahrens (FZAP_BLOCK_SHIFT(zap)-3)); 38966328dd3Sahrens 39066328dd3Sahrens return (0); 391fa9e4066Sahrens } else { 392c1379625SJustin T. Gibbs return (zap_table_grow(zap, &zap_f_phys(zap)->zap_ptrtbl, 39366328dd3Sahrens zap_ptrtbl_transfer, tx)); 394fa9e4066Sahrens } 395fa9e4066Sahrens } 396fa9e4066Sahrens 397fa9e4066Sahrens static void 398fa9e4066Sahrens zap_increment_num_entries(zap_t *zap, int delta, dmu_tx_t *tx) 399fa9e4066Sahrens { 400fa9e4066Sahrens dmu_buf_will_dirty(zap->zap_dbuf, tx); 401fa9e4066Sahrens mutex_enter(&zap->zap_f.zap_num_entries_mtx); 402c1379625SJustin T. Gibbs ASSERT(delta > 0 || zap_f_phys(zap)->zap_num_entries >= -delta); 403c1379625SJustin T. Gibbs zap_f_phys(zap)->zap_num_entries += delta; 404fa9e4066Sahrens mutex_exit(&zap->zap_f.zap_num_entries_mtx); 405fa9e4066Sahrens } 406fa9e4066Sahrens 40766328dd3Sahrens static uint64_t 40866328dd3Sahrens zap_allocate_blocks(zap_t *zap, int nblocks) 409fa9e4066Sahrens { 41066328dd3Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 411bf26014cSMatthew Ahrens uint64_t newblk = zap_f_phys(zap)->zap_freeblk; 412c1379625SJustin T. Gibbs zap_f_phys(zap)->zap_freeblk += nblocks; 413fa9e4066Sahrens return (newblk); 414fa9e4066Sahrens } 415fa9e4066Sahrens 416bc9014e6SJustin Gibbs static void 41740510e8eSJosef 'Jeff' Sipek zap_leaf_evict_sync(void *dbu) 418bc9014e6SJustin Gibbs { 419bc9014e6SJustin Gibbs zap_leaf_t *l = dbu; 420bc9014e6SJustin Gibbs 421bc9014e6SJustin Gibbs rw_destroy(&l->l_rwlock); 422bc9014e6SJustin Gibbs kmem_free(l, sizeof (zap_leaf_t)); 423bc9014e6SJustin Gibbs } 424bc9014e6SJustin Gibbs 42566328dd3Sahrens static zap_leaf_t * 426fa9e4066Sahrens zap_create_leaf(zap_t *zap, dmu_tx_t *tx) 427fa9e4066Sahrens { 428bc9014e6SJustin Gibbs zap_leaf_t *l = kmem_zalloc(sizeof (zap_leaf_t), KM_SLEEP); 429fa9e4066Sahrens 430fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 431fa9e4066Sahrens 432fa9e4066Sahrens rw_init(&l->l_rwlock, 0, 0, 0); 433fa9e4066Sahrens rw_enter(&l->l_rwlock, RW_WRITER); 43466328dd3Sahrens l->l_blkid = zap_allocate_blocks(zap, 1); 435fa9e4066Sahrens l->l_dbuf = NULL; 436fa9e4066Sahrens 437bf26014cSMatthew Ahrens VERIFY0(dmu_buf_hold(zap->zap_objset, zap->zap_object, 43847cb52daSJeff Bonwick l->l_blkid << FZAP_BLOCK_SHIFT(zap), NULL, &l->l_dbuf, 43947cb52daSJeff Bonwick DMU_READ_NO_PREFETCH)); 44040510e8eSJosef 'Jeff' Sipek dmu_buf_init_user(&l->l_dbu, zap_leaf_evict_sync, NULL, &l->l_dbuf); 441bf26014cSMatthew Ahrens VERIFY3P(NULL, ==, dmu_buf_set_user(l->l_dbuf, &l->l_dbu)); 442fa9e4066Sahrens dmu_buf_will_dirty(l->l_dbuf, tx); 443fa9e4066Sahrens 444de8267e0Stimh zap_leaf_init(l, zap->zap_normflags != 0); 445fa9e4066Sahrens 446c1379625SJustin T. Gibbs zap_f_phys(zap)->zap_num_leafs++; 447fa9e4066Sahrens 44866328dd3Sahrens return (l); 449fa9e4066Sahrens } 450fa9e4066Sahrens 451fa9e4066Sahrens int 452fa9e4066Sahrens fzap_count(zap_t *zap, uint64_t *count) 453fa9e4066Sahrens { 454fa9e4066Sahrens ASSERT(!zap->zap_ismicro); 455fa9e4066Sahrens mutex_enter(&zap->zap_f.zap_num_entries_mtx); /* unnecessary */ 456c1379625SJustin T. Gibbs *count = zap_f_phys(zap)->zap_num_entries; 457fa9e4066Sahrens mutex_exit(&zap->zap_f.zap_num_entries_mtx); 458fa9e4066Sahrens return (0); 459fa9e4066Sahrens } 460fa9e4066Sahrens 461fa9e4066Sahrens /* 462fa9e4066Sahrens * Routines for obtaining zap_leaf_t's 463fa9e4066Sahrens */ 464fa9e4066Sahrens 46587e5029aSahrens void 466fa9e4066Sahrens zap_put_leaf(zap_leaf_t *l) 467fa9e4066Sahrens { 468fa9e4066Sahrens rw_exit(&l->l_rwlock); 469ea8dc4b6Seschrock dmu_buf_rele(l->l_dbuf, NULL); 470fa9e4066Sahrens } 471fa9e4066Sahrens 472fa9e4066Sahrens static zap_leaf_t * 473fa9e4066Sahrens zap_open_leaf(uint64_t blkid, dmu_buf_t *db) 474fa9e4066Sahrens { 475fa9e4066Sahrens ASSERT(blkid != 0); 476fa9e4066Sahrens 477bf26014cSMatthew Ahrens zap_leaf_t *l = kmem_zalloc(sizeof (zap_leaf_t), KM_SLEEP); 478fa9e4066Sahrens rw_init(&l->l_rwlock, 0, 0, 0); 479fa9e4066Sahrens rw_enter(&l->l_rwlock, RW_WRITER); 480fa9e4066Sahrens l->l_blkid = blkid; 481bf16b11eSMatthew Ahrens l->l_bs = highbit64(db->db_size) - 1; 482fa9e4066Sahrens l->l_dbuf = db; 483fa9e4066Sahrens 48440510e8eSJosef 'Jeff' Sipek dmu_buf_init_user(&l->l_dbu, zap_leaf_evict_sync, NULL, &l->l_dbuf); 485bf26014cSMatthew Ahrens zap_leaf_t *winner = dmu_buf_set_user(db, &l->l_dbu); 486fa9e4066Sahrens 487fa9e4066Sahrens rw_exit(&l->l_rwlock); 488fa9e4066Sahrens if (winner != NULL) { 489fa9e4066Sahrens /* someone else set it first */ 49040510e8eSJosef 'Jeff' Sipek zap_leaf_evict_sync(&l->l_dbu); 491fa9e4066Sahrens l = winner; 492fa9e4066Sahrens } 493fa9e4066Sahrens 49466328dd3Sahrens /* 49566328dd3Sahrens * lhr_pad was previously used for the next leaf in the leaf 49666328dd3Sahrens * chain. There should be no chained leafs (as we have removed 49766328dd3Sahrens * support for them). 49866328dd3Sahrens */ 499c1379625SJustin T. Gibbs ASSERT0(zap_leaf_phys(l)->l_hdr.lh_pad1); 50066328dd3Sahrens 501f65e61c0Sahrens /* 502f65e61c0Sahrens * There should be more hash entries than there can be 503f65e61c0Sahrens * chunks to put in the hash table 504f65e61c0Sahrens */ 505f65e61c0Sahrens ASSERT3U(ZAP_LEAF_HASH_NUMENTRIES(l), >, ZAP_LEAF_NUMCHUNKS(l) / 3); 506f65e61c0Sahrens 507f65e61c0Sahrens /* The chunks should begin at the end of the hash table */ 508f65e61c0Sahrens ASSERT3P(&ZAP_LEAF_CHUNK(l, 0), ==, 509c1379625SJustin T. Gibbs &zap_leaf_phys(l)->l_hash[ZAP_LEAF_HASH_NUMENTRIES(l)]); 510f65e61c0Sahrens 511f65e61c0Sahrens /* The chunks should end at the end of the block */ 512f65e61c0Sahrens ASSERT3U((uintptr_t)&ZAP_LEAF_CHUNK(l, ZAP_LEAF_NUMCHUNKS(l)) - 513c1379625SJustin T. Gibbs (uintptr_t)zap_leaf_phys(l), ==, l->l_dbuf->db_size); 514f65e61c0Sahrens 515fa9e4066Sahrens return (l); 516fa9e4066Sahrens } 517fa9e4066Sahrens 518ea8dc4b6Seschrock static int 51966328dd3Sahrens zap_get_leaf_byblk(zap_t *zap, uint64_t blkid, dmu_tx_t *tx, krw_t lt, 520ea8dc4b6Seschrock zap_leaf_t **lp) 521fa9e4066Sahrens { 522fa9e4066Sahrens dmu_buf_t *db; 523fa9e4066Sahrens 524fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 525fa9e4066Sahrens 526bf26014cSMatthew Ahrens int bs = FZAP_BLOCK_SHIFT(zap); 52779d72832SMatthew Ahrens dnode_t *dn = dmu_buf_dnode_enter(zap->zap_dbuf); 528bf26014cSMatthew Ahrens int err = dmu_buf_hold_by_dnode(dn, 52947cb52daSJeff Bonwick blkid << bs, NULL, &db, DMU_READ_NO_PREFETCH); 53079d72832SMatthew Ahrens dmu_buf_dnode_exit(zap->zap_dbuf); 531bf26014cSMatthew Ahrens if (err != 0) 532ea8dc4b6Seschrock return (err); 533fa9e4066Sahrens 534fa9e4066Sahrens ASSERT3U(db->db_object, ==, zap->zap_object); 535f65e61c0Sahrens ASSERT3U(db->db_offset, ==, blkid << bs); 536f65e61c0Sahrens ASSERT3U(db->db_size, ==, 1 << bs); 537fa9e4066Sahrens ASSERT(blkid != 0); 538fa9e4066Sahrens 539bf26014cSMatthew Ahrens zap_leaf_t *l = dmu_buf_get_user(db); 540fa9e4066Sahrens 541fa9e4066Sahrens if (l == NULL) 542fa9e4066Sahrens l = zap_open_leaf(blkid, db); 543fa9e4066Sahrens 544fa9e4066Sahrens rw_enter(&l->l_rwlock, lt); 545fa9e4066Sahrens /* 546c1379625SJustin T. Gibbs * Must lock before dirtying, otherwise zap_leaf_phys(l) could change, 547fa9e4066Sahrens * causing ASSERT below to fail. 548fa9e4066Sahrens */ 549fa9e4066Sahrens if (lt == RW_WRITER) 550fa9e4066Sahrens dmu_buf_will_dirty(db, tx); 551fa9e4066Sahrens ASSERT3U(l->l_blkid, ==, blkid); 552fa9e4066Sahrens ASSERT3P(l->l_dbuf, ==, db); 553c1379625SJustin T. Gibbs ASSERT3U(zap_leaf_phys(l)->l_hdr.lh_block_type, ==, ZBT_LEAF); 554c1379625SJustin T. Gibbs ASSERT3U(zap_leaf_phys(l)->l_hdr.lh_magic, ==, ZAP_LEAF_MAGIC); 555fa9e4066Sahrens 556ea8dc4b6Seschrock *lp = l; 557ea8dc4b6Seschrock return (0); 558fa9e4066Sahrens } 559fa9e4066Sahrens 560ea8dc4b6Seschrock static int 561ea8dc4b6Seschrock zap_idx_to_blk(zap_t *zap, uint64_t idx, uint64_t *valp) 562fa9e4066Sahrens { 563fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 564fa9e4066Sahrens 565c1379625SJustin T. Gibbs if (zap_f_phys(zap)->zap_ptrtbl.zt_numblks == 0) { 566fa9e4066Sahrens ASSERT3U(idx, <, 567c1379625SJustin T. Gibbs (1ULL << zap_f_phys(zap)->zap_ptrtbl.zt_shift)); 568ea8dc4b6Seschrock *valp = ZAP_EMBEDDED_PTRTBL_ENT(zap, idx); 569ea8dc4b6Seschrock return (0); 570fa9e4066Sahrens } else { 571c1379625SJustin T. Gibbs return (zap_table_load(zap, &zap_f_phys(zap)->zap_ptrtbl, 572ea8dc4b6Seschrock idx, valp)); 573fa9e4066Sahrens } 574fa9e4066Sahrens } 575fa9e4066Sahrens 576ea8dc4b6Seschrock static int 577fa9e4066Sahrens zap_set_idx_to_blk(zap_t *zap, uint64_t idx, uint64_t blk, dmu_tx_t *tx) 578fa9e4066Sahrens { 579fa9e4066Sahrens ASSERT(tx != NULL); 580fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 581fa9e4066Sahrens 582c1379625SJustin T. Gibbs if (zap_f_phys(zap)->zap_ptrtbl.zt_blk == 0) { 583f65e61c0Sahrens ZAP_EMBEDDED_PTRTBL_ENT(zap, idx) = blk; 584ea8dc4b6Seschrock return (0); 585fa9e4066Sahrens } else { 586c1379625SJustin T. Gibbs return (zap_table_store(zap, &zap_f_phys(zap)->zap_ptrtbl, 587ea8dc4b6Seschrock idx, blk, tx)); 588fa9e4066Sahrens } 589fa9e4066Sahrens } 590fa9e4066Sahrens 591ea8dc4b6Seschrock static int 592ea8dc4b6Seschrock zap_deref_leaf(zap_t *zap, uint64_t h, dmu_tx_t *tx, krw_t lt, zap_leaf_t **lp) 593fa9e4066Sahrens { 594bf26014cSMatthew Ahrens uint64_t blk; 595fa9e4066Sahrens 596fa9e4066Sahrens ASSERT(zap->zap_dbuf == NULL || 597c1379625SJustin T. Gibbs zap_f_phys(zap) == zap->zap_dbuf->db_data); 59802525cd0SChunwei Chen 59902525cd0SChunwei Chen /* Reality check for corrupt zap objects (leaf or header). */ 60002525cd0SChunwei Chen if ((zap_f_phys(zap)->zap_block_type != ZBT_LEAF && 60102525cd0SChunwei Chen zap_f_phys(zap)->zap_block_type != ZBT_HEADER) || 60202525cd0SChunwei Chen zap_f_phys(zap)->zap_magic != ZAP_MAGIC) { 60302525cd0SChunwei Chen return (SET_ERROR(EIO)); 60402525cd0SChunwei Chen } 60502525cd0SChunwei Chen 606bf26014cSMatthew Ahrens uint64_t idx = ZAP_HASH_IDX(h, zap_f_phys(zap)->zap_ptrtbl.zt_shift); 607bf26014cSMatthew Ahrens int err = zap_idx_to_blk(zap, idx, &blk); 608ea8dc4b6Seschrock if (err != 0) 609ea8dc4b6Seschrock return (err); 610ea8dc4b6Seschrock err = zap_get_leaf_byblk(zap, blk, tx, lt, lp); 611fa9e4066Sahrens 612c1379625SJustin T. Gibbs ASSERT(err || 613c1379625SJustin T. Gibbs ZAP_HASH_IDX(h, zap_leaf_phys(*lp)->l_hdr.lh_prefix_len) == 614c1379625SJustin T. Gibbs zap_leaf_phys(*lp)->l_hdr.lh_prefix); 615ea8dc4b6Seschrock return (err); 616fa9e4066Sahrens } 617fa9e4066Sahrens 618ea8dc4b6Seschrock static int 619ae972795SMatthew Ahrens zap_expand_leaf(zap_name_t *zn, zap_leaf_t *l, 620ae972795SMatthew Ahrens void *tag, dmu_tx_t *tx, zap_leaf_t **lp) 621fa9e4066Sahrens { 622ad860c82Sbonwick zap_t *zap = zn->zn_zap; 623ad860c82Sbonwick uint64_t hash = zn->zn_hash; 624bf26014cSMatthew Ahrens int err; 625c1379625SJustin T. Gibbs int old_prefix_len = zap_leaf_phys(l)->l_hdr.lh_prefix_len; 626fa9e4066Sahrens 627c1379625SJustin T. Gibbs ASSERT3U(old_prefix_len, <=, zap_f_phys(zap)->zap_ptrtbl.zt_shift); 628fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 629fa9e4066Sahrens 63066328dd3Sahrens ASSERT3U(ZAP_HASH_IDX(hash, old_prefix_len), ==, 631c1379625SJustin T. Gibbs zap_leaf_phys(l)->l_hdr.lh_prefix); 632fa9e4066Sahrens 63366328dd3Sahrens if (zap_tryupgradedir(zap, tx) == 0 || 634c1379625SJustin T. Gibbs old_prefix_len == zap_f_phys(zap)->zap_ptrtbl.zt_shift) { 63566328dd3Sahrens /* We failed to upgrade, or need to grow the pointer table */ 636fa9e4066Sahrens objset_t *os = zap->zap_objset; 637fa9e4066Sahrens uint64_t object = zap->zap_object; 638fa9e4066Sahrens 639fa9e4066Sahrens zap_put_leaf(l); 640ae972795SMatthew Ahrens zap_unlockdir(zap, tag); 641c5f9e431Sahrens err = zap_lockdir(os, object, tx, RW_WRITER, 642ae972795SMatthew Ahrens FALSE, FALSE, tag, &zn->zn_zap); 643ad860c82Sbonwick zap = zn->zn_zap; 644bf26014cSMatthew Ahrens if (err != 0) 64566328dd3Sahrens return (err); 646fa9e4066Sahrens ASSERT(!zap->zap_ismicro); 647fa9e4066Sahrens 64866328dd3Sahrens while (old_prefix_len == 649c1379625SJustin T. Gibbs zap_f_phys(zap)->zap_ptrtbl.zt_shift) { 65066328dd3Sahrens err = zap_grow_ptrtbl(zap, tx); 651bf26014cSMatthew Ahrens if (err != 0) 65266328dd3Sahrens return (err); 65366328dd3Sahrens } 65466328dd3Sahrens 65566328dd3Sahrens err = zap_deref_leaf(zap, hash, tx, RW_WRITER, &l); 656bf26014cSMatthew Ahrens if (err != 0) 65766328dd3Sahrens return (err); 65866328dd3Sahrens 659c1379625SJustin T. Gibbs if (zap_leaf_phys(l)->l_hdr.lh_prefix_len != old_prefix_len) { 660fa9e4066Sahrens /* it split while our locks were down */ 661ea8dc4b6Seschrock *lp = l; 662ea8dc4b6Seschrock return (0); 663ea8dc4b6Seschrock } 664fa9e4066Sahrens } 665fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 666c1379625SJustin T. Gibbs ASSERT3U(old_prefix_len, <, zap_f_phys(zap)->zap_ptrtbl.zt_shift); 66766328dd3Sahrens ASSERT3U(ZAP_HASH_IDX(hash, old_prefix_len), ==, 668c1379625SJustin T. Gibbs zap_leaf_phys(l)->l_hdr.lh_prefix); 669fa9e4066Sahrens 670bf26014cSMatthew Ahrens int prefix_diff = zap_f_phys(zap)->zap_ptrtbl.zt_shift - 67166328dd3Sahrens (old_prefix_len + 1); 672bf26014cSMatthew Ahrens uint64_t sibling = 673bf26014cSMatthew Ahrens (ZAP_HASH_IDX(hash, old_prefix_len + 1) | 1) << prefix_diff; 674ea8dc4b6Seschrock 675ea8dc4b6Seschrock /* check for i/o errors before doing zap_leaf_split */ 676bf26014cSMatthew Ahrens for (int i = 0; i < (1ULL << prefix_diff); i++) { 677ea8dc4b6Seschrock uint64_t blk; 678bf26014cSMatthew Ahrens err = zap_idx_to_blk(zap, sibling + i, &blk); 679bf26014cSMatthew Ahrens if (err != 0) 680ea8dc4b6Seschrock return (err); 681ea8dc4b6Seschrock ASSERT3U(blk, ==, l->l_blkid); 682ea8dc4b6Seschrock } 683ea8dc4b6Seschrock 684bf26014cSMatthew Ahrens zap_leaf_t *nl = zap_create_leaf(zap, tx); 685de8267e0Stimh zap_leaf_split(l, nl, zap->zap_normflags != 0); 686ea8dc4b6Seschrock 68766328dd3Sahrens /* set sibling pointers */ 688bf26014cSMatthew Ahrens for (int i = 0; i < (1ULL << prefix_diff); i++) { 689bf26014cSMatthew Ahrens err = zap_set_idx_to_blk(zap, sibling + i, nl->l_blkid, tx); 690fb09f5aaSMadhav Suresh ASSERT0(err); /* we checked for i/o errors above */ 691fa9e4066Sahrens } 692fa9e4066Sahrens 693c1379625SJustin T. Gibbs if (hash & (1ULL << (64 - zap_leaf_phys(l)->l_hdr.lh_prefix_len))) { 694fa9e4066Sahrens /* we want the sibling */ 695fa9e4066Sahrens zap_put_leaf(l); 69666328dd3Sahrens *lp = nl; 697fa9e4066Sahrens } else { 698fa9e4066Sahrens zap_put_leaf(nl); 69966328dd3Sahrens *lp = l; 700fa9e4066Sahrens } 701fa9e4066Sahrens 702ea8dc4b6Seschrock return (0); 703fa9e4066Sahrens } 704fa9e4066Sahrens 705fa9e4066Sahrens static void 706ae972795SMatthew Ahrens zap_put_leaf_maybe_grow_ptrtbl(zap_name_t *zn, zap_leaf_t *l, 707ae972795SMatthew Ahrens void *tag, dmu_tx_t *tx) 708fa9e4066Sahrens { 709ad860c82Sbonwick zap_t *zap = zn->zn_zap; 710c1379625SJustin T. Gibbs int shift = zap_f_phys(zap)->zap_ptrtbl.zt_shift; 711c1379625SJustin T. Gibbs int leaffull = (zap_leaf_phys(l)->l_hdr.lh_prefix_len == shift && 712c1379625SJustin T. Gibbs zap_leaf_phys(l)->l_hdr.lh_nfree < ZAP_LEAF_LOW_WATER); 713fa9e4066Sahrens 71466328dd3Sahrens zap_put_leaf(l); 715fa9e4066Sahrens 716c1379625SJustin T. Gibbs if (leaffull || zap_f_phys(zap)->zap_ptrtbl.zt_nextblk) { 71766328dd3Sahrens /* 71866328dd3Sahrens * We are in the middle of growing the pointer table, or 71966328dd3Sahrens * this leaf will soon make us grow it. 72066328dd3Sahrens */ 721fa9e4066Sahrens if (zap_tryupgradedir(zap, tx) == 0) { 722fa9e4066Sahrens objset_t *os = zap->zap_objset; 723fa9e4066Sahrens uint64_t zapobj = zap->zap_object; 724fa9e4066Sahrens 725ae972795SMatthew Ahrens zap_unlockdir(zap, tag); 726bf26014cSMatthew Ahrens int err = zap_lockdir(os, zapobj, tx, 727ae972795SMatthew Ahrens RW_WRITER, FALSE, FALSE, tag, &zn->zn_zap); 728ad860c82Sbonwick zap = zn->zn_zap; 729bf26014cSMatthew Ahrens if (err != 0) 73066328dd3Sahrens return; 731fa9e4066Sahrens } 732fa9e4066Sahrens 73366328dd3Sahrens /* could have finished growing while our locks were down */ 734c1379625SJustin T. Gibbs if (zap_f_phys(zap)->zap_ptrtbl.zt_shift == shift) 73566328dd3Sahrens (void) zap_grow_ptrtbl(zap, tx); 736fa9e4066Sahrens } 737fa9e4066Sahrens } 738fa9e4066Sahrens 739fa9e4066Sahrens static int 74092241e0bSTom Erickson fzap_checkname(zap_name_t *zn) 741fa9e4066Sahrens { 742486ae710SMatthew Ahrens if (zn->zn_key_orig_numints * zn->zn_key_intlen > ZAP_MAXNAMELEN) 743be6fd75aSMatthew Ahrens return (SET_ERROR(ENAMETOOLONG)); 74492241e0bSTom Erickson return (0); 74592241e0bSTom Erickson } 74666328dd3Sahrens 74792241e0bSTom Erickson static int 74892241e0bSTom Erickson fzap_checksize(uint64_t integer_size, uint64_t num_integers) 74992241e0bSTom Erickson { 750fa9e4066Sahrens /* Only integer sizes supported by C */ 751fa9e4066Sahrens switch (integer_size) { 752fa9e4066Sahrens case 1: 753fa9e4066Sahrens case 2: 754fa9e4066Sahrens case 4: 755fa9e4066Sahrens case 8: 756fa9e4066Sahrens break; 757fa9e4066Sahrens default: 758be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL)); 759fa9e4066Sahrens } 760fa9e4066Sahrens 76166328dd3Sahrens if (integer_size * num_integers > ZAP_MAXVALUELEN) 76266328dd3Sahrens return (E2BIG); 763fa9e4066Sahrens 764fa9e4066Sahrens return (0); 765fa9e4066Sahrens } 766fa9e4066Sahrens 76792241e0bSTom Erickson static int 76892241e0bSTom Erickson fzap_check(zap_name_t *zn, uint64_t integer_size, uint64_t num_integers) 76992241e0bSTom Erickson { 770bf26014cSMatthew Ahrens int err = fzap_checkname(zn); 771bf26014cSMatthew Ahrens if (err != 0) 77292241e0bSTom Erickson return (err); 77392241e0bSTom Erickson return (fzap_checksize(integer_size, num_integers)); 77492241e0bSTom Erickson } 77592241e0bSTom Erickson 776fa9e4066Sahrens /* 777da6c28aaSamw * Routines for manipulating attributes. 778fa9e4066Sahrens */ 779fa9e4066Sahrens int 780da6c28aaSamw fzap_lookup(zap_name_t *zn, 781da6c28aaSamw uint64_t integer_size, uint64_t num_integers, void *buf, 782da6c28aaSamw char *realname, int rn_len, boolean_t *ncp) 783fa9e4066Sahrens { 784fa9e4066Sahrens zap_leaf_t *l; 785fa9e4066Sahrens zap_entry_handle_t zeh; 786fa9e4066Sahrens 787bf26014cSMatthew Ahrens int err = fzap_checkname(zn); 788bf26014cSMatthew Ahrens if (err != 0) 789fa9e4066Sahrens return (err); 790fa9e4066Sahrens 791da6c28aaSamw err = zap_deref_leaf(zn->zn_zap, zn->zn_hash, NULL, RW_READER, &l); 792ea8dc4b6Seschrock if (err != 0) 793ea8dc4b6Seschrock return (err); 794da6c28aaSamw err = zap_leaf_lookup(l, zn, &zeh); 795da6c28aaSamw if (err == 0) { 79692241e0bSTom Erickson if ((err = fzap_checksize(integer_size, num_integers)) != 0) { 79792241e0bSTom Erickson zap_put_leaf(l); 79892241e0bSTom Erickson return (err); 79992241e0bSTom Erickson } 80092241e0bSTom Erickson 80166328dd3Sahrens err = zap_entry_read(&zeh, integer_size, num_integers, buf); 802b24ab676SJeff Bonwick (void) zap_entry_read_name(zn->zn_zap, &zeh, rn_len, realname); 803da6c28aaSamw if (ncp) { 804da6c28aaSamw *ncp = zap_entry_normalization_conflict(&zeh, 805da6c28aaSamw zn, NULL, zn->zn_zap); 806da6c28aaSamw } 807da6c28aaSamw } 80866328dd3Sahrens 809fa9e4066Sahrens zap_put_leaf(l); 810fa9e4066Sahrens return (err); 811fa9e4066Sahrens } 812fa9e4066Sahrens 813fa9e4066Sahrens int 814da6c28aaSamw fzap_add_cd(zap_name_t *zn, 815fa9e4066Sahrens uint64_t integer_size, uint64_t num_integers, 816ae972795SMatthew Ahrens const void *val, uint32_t cd, void *tag, dmu_tx_t *tx) 817fa9e4066Sahrens { 818fa9e4066Sahrens zap_leaf_t *l; 819fa9e4066Sahrens int err; 820fa9e4066Sahrens zap_entry_handle_t zeh; 821da6c28aaSamw zap_t *zap = zn->zn_zap; 822fa9e4066Sahrens 823fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 824fa9e4066Sahrens ASSERT(!zap->zap_ismicro); 82592241e0bSTom Erickson ASSERT(fzap_check(zn, integer_size, num_integers) == 0); 826fa9e4066Sahrens 827da6c28aaSamw err = zap_deref_leaf(zap, zn->zn_hash, tx, RW_WRITER, &l); 828ea8dc4b6Seschrock if (err != 0) 829ea8dc4b6Seschrock return (err); 830fa9e4066Sahrens retry: 831da6c28aaSamw err = zap_leaf_lookup(l, zn, &zeh); 832fa9e4066Sahrens if (err == 0) { 833be6fd75aSMatthew Ahrens err = SET_ERROR(EEXIST); 834fa9e4066Sahrens goto out; 835fa9e4066Sahrens } 836ea8dc4b6Seschrock if (err != ENOENT) 837ea8dc4b6Seschrock goto out; 838fa9e4066Sahrens 839b24ab676SJeff Bonwick err = zap_entry_create(l, zn, cd, 840fa9e4066Sahrens integer_size, num_integers, val, &zeh); 841fa9e4066Sahrens 842fa9e4066Sahrens if (err == 0) { 843fa9e4066Sahrens zap_increment_num_entries(zap, 1, tx); 844fa9e4066Sahrens } else if (err == EAGAIN) { 845ae972795SMatthew Ahrens err = zap_expand_leaf(zn, l, tag, tx, &l); 846ad860c82Sbonwick zap = zn->zn_zap; /* zap_expand_leaf() may change zap */ 84766328dd3Sahrens if (err == 0) 84866328dd3Sahrens goto retry; 849fa9e4066Sahrens } 850fa9e4066Sahrens 851fa9e4066Sahrens out: 852ad860c82Sbonwick if (zap != NULL) 853ae972795SMatthew Ahrens zap_put_leaf_maybe_grow_ptrtbl(zn, l, tag, tx); 854fa9e4066Sahrens return (err); 855fa9e4066Sahrens } 856fa9e4066Sahrens 857fa9e4066Sahrens int 858da6c28aaSamw fzap_add(zap_name_t *zn, 859fa9e4066Sahrens uint64_t integer_size, uint64_t num_integers, 860ae972795SMatthew Ahrens const void *val, void *tag, dmu_tx_t *tx) 861fa9e4066Sahrens { 86292241e0bSTom Erickson int err = fzap_check(zn, integer_size, num_integers); 863fa9e4066Sahrens if (err != 0) 864fa9e4066Sahrens return (err); 865fa9e4066Sahrens 866da6c28aaSamw return (fzap_add_cd(zn, integer_size, num_integers, 867ae972795SMatthew Ahrens val, ZAP_NEED_CD, tag, tx)); 868fa9e4066Sahrens } 869fa9e4066Sahrens 870fa9e4066Sahrens int 871da6c28aaSamw fzap_update(zap_name_t *zn, 872ae972795SMatthew Ahrens int integer_size, uint64_t num_integers, const void *val, 873ae972795SMatthew Ahrens void *tag, dmu_tx_t *tx) 874fa9e4066Sahrens { 875fa9e4066Sahrens zap_leaf_t *l; 876bf26014cSMatthew Ahrens int err; 877bf26014cSMatthew Ahrens boolean_t create; 878fa9e4066Sahrens zap_entry_handle_t zeh; 879da6c28aaSamw zap_t *zap = zn->zn_zap; 880fa9e4066Sahrens 881fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 88292241e0bSTom Erickson err = fzap_check(zn, integer_size, num_integers); 883fa9e4066Sahrens if (err != 0) 884fa9e4066Sahrens return (err); 885fa9e4066Sahrens 886da6c28aaSamw err = zap_deref_leaf(zap, zn->zn_hash, tx, RW_WRITER, &l); 887ea8dc4b6Seschrock if (err != 0) 888ea8dc4b6Seschrock return (err); 889fa9e4066Sahrens retry: 890da6c28aaSamw err = zap_leaf_lookup(l, zn, &zeh); 891fa9e4066Sahrens create = (err == ENOENT); 892fa9e4066Sahrens ASSERT(err == 0 || err == ENOENT); 893fa9e4066Sahrens 894fa9e4066Sahrens if (create) { 895b24ab676SJeff Bonwick err = zap_entry_create(l, zn, ZAP_NEED_CD, 896b24ab676SJeff Bonwick integer_size, num_integers, val, &zeh); 897fa9e4066Sahrens if (err == 0) 898fa9e4066Sahrens zap_increment_num_entries(zap, 1, tx); 899fa9e4066Sahrens } else { 900fa9e4066Sahrens err = zap_entry_update(&zeh, integer_size, num_integers, val); 901fa9e4066Sahrens } 902fa9e4066Sahrens 903fa9e4066Sahrens if (err == EAGAIN) { 904ae972795SMatthew Ahrens err = zap_expand_leaf(zn, l, tag, tx, &l); 905ad860c82Sbonwick zap = zn->zn_zap; /* zap_expand_leaf() may change zap */ 90666328dd3Sahrens if (err == 0) 90766328dd3Sahrens goto retry; 908fa9e4066Sahrens } 909fa9e4066Sahrens 910ad860c82Sbonwick if (zap != NULL) 911ae972795SMatthew Ahrens zap_put_leaf_maybe_grow_ptrtbl(zn, l, tag, tx); 912fa9e4066Sahrens return (err); 913fa9e4066Sahrens } 914fa9e4066Sahrens 915fa9e4066Sahrens int 916da6c28aaSamw fzap_length(zap_name_t *zn, 917fa9e4066Sahrens uint64_t *integer_size, uint64_t *num_integers) 918fa9e4066Sahrens { 919fa9e4066Sahrens zap_leaf_t *l; 920fa9e4066Sahrens int err; 921fa9e4066Sahrens zap_entry_handle_t zeh; 922fa9e4066Sahrens 923da6c28aaSamw err = zap_deref_leaf(zn->zn_zap, zn->zn_hash, NULL, RW_READER, &l); 924ea8dc4b6Seschrock if (err != 0) 925ea8dc4b6Seschrock return (err); 926da6c28aaSamw err = zap_leaf_lookup(l, zn, &zeh); 927fa9e4066Sahrens if (err != 0) 928fa9e4066Sahrens goto out; 929fa9e4066Sahrens 930bf26014cSMatthew Ahrens if (integer_size != 0) 931fa9e4066Sahrens *integer_size = zeh.zeh_integer_size; 932bf26014cSMatthew Ahrens if (num_integers != 0) 933fa9e4066Sahrens *num_integers = zeh.zeh_num_integers; 934fa9e4066Sahrens out: 935fa9e4066Sahrens zap_put_leaf(l); 936fa9e4066Sahrens return (err); 937fa9e4066Sahrens } 938fa9e4066Sahrens 939fa9e4066Sahrens int 940da6c28aaSamw fzap_remove(zap_name_t *zn, dmu_tx_t *tx) 941fa9e4066Sahrens { 942fa9e4066Sahrens zap_leaf_t *l; 943fa9e4066Sahrens int err; 944fa9e4066Sahrens zap_entry_handle_t zeh; 945fa9e4066Sahrens 946da6c28aaSamw err = zap_deref_leaf(zn->zn_zap, zn->zn_hash, tx, RW_WRITER, &l); 947ea8dc4b6Seschrock if (err != 0) 948ea8dc4b6Seschrock return (err); 949da6c28aaSamw err = zap_leaf_lookup(l, zn, &zeh); 950fa9e4066Sahrens if (err == 0) { 951fa9e4066Sahrens zap_entry_remove(&zeh); 952da6c28aaSamw zap_increment_num_entries(zn->zn_zap, -1, tx); 953fa9e4066Sahrens } 954fa9e4066Sahrens zap_put_leaf(l); 955fa9e4066Sahrens return (err); 956fa9e4066Sahrens } 957fa9e4066Sahrens 958c7cd2421SGeorge Wilson void 959c7cd2421SGeorge Wilson fzap_prefetch(zap_name_t *zn) 960c7cd2421SGeorge Wilson { 961bf26014cSMatthew Ahrens uint64_t blk; 962c7cd2421SGeorge Wilson zap_t *zap = zn->zn_zap; 963c7cd2421SGeorge Wilson 964bf26014cSMatthew Ahrens uint64_t idx = ZAP_HASH_IDX(zn->zn_hash, 965c1379625SJustin T. Gibbs zap_f_phys(zap)->zap_ptrtbl.zt_shift); 966c7cd2421SGeorge Wilson if (zap_idx_to_blk(zap, idx, &blk) != 0) 967c7cd2421SGeorge Wilson return; 968bf26014cSMatthew Ahrens int bs = FZAP_BLOCK_SHIFT(zap); 969a2cdcdd2SPaul Dagnelie dmu_prefetch(zap->zap_objset, zap->zap_object, 0, blk << bs, 1 << bs, 970a2cdcdd2SPaul Dagnelie ZIO_PRIORITY_SYNC_READ); 971c7cd2421SGeorge Wilson } 972c7cd2421SGeorge Wilson 973088f3894Sahrens /* 974088f3894Sahrens * Helper functions for consumers. 975088f3894Sahrens */ 976088f3894Sahrens 977ad135b5dSChristopher Siden uint64_t 978ad135b5dSChristopher Siden zap_create_link(objset_t *os, dmu_object_type_t ot, uint64_t parent_obj, 979ad135b5dSChristopher Siden const char *name, dmu_tx_t *tx) 980ad135b5dSChristopher Siden { 98154811da5SToomas Soome return (zap_create_link_dnsize(os, ot, parent_obj, name, 0, tx)); 98254811da5SToomas Soome } 98354811da5SToomas Soome 98454811da5SToomas Soome uint64_t 98554811da5SToomas Soome zap_create_link_dnsize(objset_t *os, dmu_object_type_t ot, uint64_t parent_obj, 98654811da5SToomas Soome const char *name, int dnodesize, dmu_tx_t *tx) 98754811da5SToomas Soome { 98854811da5SToomas Soome uint64_t new_obj; 98954811da5SToomas Soome 99054811da5SToomas Soome VERIFY((new_obj = zap_create_dnsize(os, ot, DMU_OT_NONE, 0, 99154811da5SToomas Soome dnodesize, tx)) > 0); 992215198a6SJoe Stein VERIFY0(zap_add(os, parent_obj, name, sizeof (uint64_t), 1, &new_obj, 993215198a6SJoe Stein tx)); 994ad135b5dSChristopher Siden 995ad135b5dSChristopher Siden return (new_obj); 996ad135b5dSChristopher Siden } 997ad135b5dSChristopher Siden 998fa9e4066Sahrens int 999e7437265Sahrens zap_value_search(objset_t *os, uint64_t zapobj, uint64_t value, uint64_t mask, 1000e7437265Sahrens char *name) 1001fa9e4066Sahrens { 1002fa9e4066Sahrens zap_cursor_t zc; 1003fa9e4066Sahrens int err; 1004fa9e4066Sahrens 1005e7437265Sahrens if (mask == 0) 1006e7437265Sahrens mask = -1ULL; 1007e7437265Sahrens 1008bf26014cSMatthew Ahrens zap_attribute_t *za = kmem_alloc(sizeof (*za), KM_SLEEP); 1009fa9e4066Sahrens for (zap_cursor_init(&zc, os, zapobj); 1010fa9e4066Sahrens (err = zap_cursor_retrieve(&zc, za)) == 0; 1011fa9e4066Sahrens zap_cursor_advance(&zc)) { 1012e7437265Sahrens if ((za->za_first_integer & mask) == (value & mask)) { 1013fa9e4066Sahrens (void) strcpy(name, za->za_name); 1014fa9e4066Sahrens break; 1015fa9e4066Sahrens } 1016fa9e4066Sahrens } 101787e5029aSahrens zap_cursor_fini(&zc); 1018bf26014cSMatthew Ahrens kmem_free(za, sizeof (*za)); 1019fa9e4066Sahrens return (err); 1020fa9e4066Sahrens } 1021fa9e4066Sahrens 1022088f3894Sahrens int 1023088f3894Sahrens zap_join(objset_t *os, uint64_t fromobj, uint64_t intoobj, dmu_tx_t *tx) 1024088f3894Sahrens { 1025088f3894Sahrens zap_cursor_t zc; 1026bf26014cSMatthew Ahrens int err = 0; 1027088f3894Sahrens 1028bf26014cSMatthew Ahrens zap_attribute_t *za = kmem_alloc(sizeof (*za), KM_SLEEP); 1029088f3894Sahrens for (zap_cursor_init(&zc, os, fromobj); 1030bf26014cSMatthew Ahrens zap_cursor_retrieve(&zc, za) == 0; 1031088f3894Sahrens (void) zap_cursor_advance(&zc)) { 1032bf26014cSMatthew Ahrens if (za->za_integer_length != 8 || za->za_num_integers != 1) { 1033b287be1bSWill Andrews err = SET_ERROR(EINVAL); 1034b287be1bSWill Andrews break; 1035b287be1bSWill Andrews } 1036bf26014cSMatthew Ahrens err = zap_add(os, intoobj, za->za_name, 1037bf26014cSMatthew Ahrens 8, 1, &za->za_first_integer, tx); 1038bf26014cSMatthew Ahrens if (err != 0) 1039b287be1bSWill Andrews break; 1040088f3894Sahrens } 1041088f3894Sahrens zap_cursor_fini(&zc); 1042bf26014cSMatthew Ahrens kmem_free(za, sizeof (*za)); 1043b287be1bSWill Andrews return (err); 1044088f3894Sahrens } 1045088f3894Sahrens 10463f9d6ad7SLin Ling int 10473f9d6ad7SLin Ling zap_join_key(objset_t *os, uint64_t fromobj, uint64_t intoobj, 10483f9d6ad7SLin Ling uint64_t value, dmu_tx_t *tx) 10493f9d6ad7SLin Ling { 10503f9d6ad7SLin Ling zap_cursor_t zc; 1051bf26014cSMatthew Ahrens int err = 0; 10523f9d6ad7SLin Ling 1053bf26014cSMatthew Ahrens zap_attribute_t *za = kmem_alloc(sizeof (*za), KM_SLEEP); 10543f9d6ad7SLin Ling for (zap_cursor_init(&zc, os, fromobj); 1055bf26014cSMatthew Ahrens zap_cursor_retrieve(&zc, za) == 0; 10563f9d6ad7SLin Ling (void) zap_cursor_advance(&zc)) { 1057bf26014cSMatthew Ahrens if (za->za_integer_length != 8 || za->za_num_integers != 1) { 1058b287be1bSWill Andrews err = SET_ERROR(EINVAL); 1059b287be1bSWill Andrews break; 1060b287be1bSWill Andrews } 1061bf26014cSMatthew Ahrens err = zap_add(os, intoobj, za->za_name, 10623f9d6ad7SLin Ling 8, 1, &value, tx); 1063bf26014cSMatthew Ahrens if (err != 0) 1064b287be1bSWill Andrews break; 10653f9d6ad7SLin Ling } 10663f9d6ad7SLin Ling zap_cursor_fini(&zc); 1067bf26014cSMatthew Ahrens kmem_free(za, sizeof (*za)); 1068b287be1bSWill Andrews return (err); 10693f9d6ad7SLin Ling } 10703f9d6ad7SLin Ling 10713f9d6ad7SLin Ling int 10723f9d6ad7SLin Ling zap_join_increment(objset_t *os, uint64_t fromobj, uint64_t intoobj, 10733f9d6ad7SLin Ling dmu_tx_t *tx) 10743f9d6ad7SLin Ling { 10753f9d6ad7SLin Ling zap_cursor_t zc; 1076bf26014cSMatthew Ahrens int err = 0; 10773f9d6ad7SLin Ling 1078bf26014cSMatthew Ahrens zap_attribute_t *za = kmem_alloc(sizeof (*za), KM_SLEEP); 10793f9d6ad7SLin Ling for (zap_cursor_init(&zc, os, fromobj); 1080bf26014cSMatthew Ahrens zap_cursor_retrieve(&zc, za) == 0; 10813f9d6ad7SLin Ling (void) zap_cursor_advance(&zc)) { 10823f9d6ad7SLin Ling uint64_t delta = 0; 10833f9d6ad7SLin Ling 1084bf26014cSMatthew Ahrens if (za->za_integer_length != 8 || za->za_num_integers != 1) { 1085b287be1bSWill Andrews err = SET_ERROR(EINVAL); 1086b287be1bSWill Andrews break; 1087b287be1bSWill Andrews } 10883f9d6ad7SLin Ling 1089bf26014cSMatthew Ahrens err = zap_lookup(os, intoobj, za->za_name, 8, 1, &delta); 10903f9d6ad7SLin Ling if (err != 0 && err != ENOENT) 1091b287be1bSWill Andrews break; 1092bf26014cSMatthew Ahrens delta += za->za_first_integer; 1093bf26014cSMatthew Ahrens err = zap_update(os, intoobj, za->za_name, 8, 1, &delta, tx); 1094bf26014cSMatthew Ahrens if (err != 0) 1095b287be1bSWill Andrews break; 10963f9d6ad7SLin Ling } 10973f9d6ad7SLin Ling zap_cursor_fini(&zc); 1098bf26014cSMatthew Ahrens kmem_free(za, sizeof (*za)); 1099b287be1bSWill Andrews return (err); 11003f9d6ad7SLin Ling } 11013f9d6ad7SLin Ling 1102088f3894Sahrens int 1103088f3894Sahrens zap_add_int(objset_t *os, uint64_t obj, uint64_t value, dmu_tx_t *tx) 1104088f3894Sahrens { 1105088f3894Sahrens char name[20]; 1106088f3894Sahrens 1107088f3894Sahrens (void) snprintf(name, sizeof (name), "%llx", (longlong_t)value); 1108088f3894Sahrens return (zap_add(os, obj, name, 8, 1, &value, tx)); 1109088f3894Sahrens } 1110088f3894Sahrens 1111088f3894Sahrens int 1112088f3894Sahrens zap_remove_int(objset_t *os, uint64_t obj, uint64_t value, dmu_tx_t *tx) 1113088f3894Sahrens { 1114088f3894Sahrens char name[20]; 1115088f3894Sahrens 1116088f3894Sahrens (void) snprintf(name, sizeof (name), "%llx", (longlong_t)value); 1117088f3894Sahrens return (zap_remove(os, obj, name, tx)); 1118088f3894Sahrens } 1119088f3894Sahrens 1120088f3894Sahrens int 1121088f3894Sahrens zap_lookup_int(objset_t *os, uint64_t obj, uint64_t value) 1122088f3894Sahrens { 1123088f3894Sahrens char name[20]; 1124088f3894Sahrens 1125088f3894Sahrens (void) snprintf(name, sizeof (name), "%llx", (longlong_t)value); 1126088f3894Sahrens return (zap_lookup(os, obj, name, 8, 1, &value)); 1127088f3894Sahrens } 1128fa9e4066Sahrens 11299966ca11SMatthew Ahrens int 11303f9d6ad7SLin Ling zap_add_int_key(objset_t *os, uint64_t obj, 11313f9d6ad7SLin Ling uint64_t key, uint64_t value, dmu_tx_t *tx) 11323f9d6ad7SLin Ling { 11333f9d6ad7SLin Ling char name[20]; 11343f9d6ad7SLin Ling 11353f9d6ad7SLin Ling (void) snprintf(name, sizeof (name), "%llx", (longlong_t)key); 11363f9d6ad7SLin Ling return (zap_add(os, obj, name, 8, 1, &value, tx)); 11373f9d6ad7SLin Ling } 11383f9d6ad7SLin Ling 1139f1745736SMatthew Ahrens int 1140f1745736SMatthew Ahrens zap_update_int_key(objset_t *os, uint64_t obj, 1141f1745736SMatthew Ahrens uint64_t key, uint64_t value, dmu_tx_t *tx) 1142f1745736SMatthew Ahrens { 1143f1745736SMatthew Ahrens char name[20]; 1144f1745736SMatthew Ahrens 1145f1745736SMatthew Ahrens (void) snprintf(name, sizeof (name), "%llx", (longlong_t)key); 1146f1745736SMatthew Ahrens return (zap_update(os, obj, name, 8, 1, &value, tx)); 1147f1745736SMatthew Ahrens } 1148f1745736SMatthew Ahrens 11493f9d6ad7SLin Ling int 11503f9d6ad7SLin Ling zap_lookup_int_key(objset_t *os, uint64_t obj, uint64_t key, uint64_t *valuep) 11519966ca11SMatthew Ahrens { 11529966ca11SMatthew Ahrens char name[20]; 11533f9d6ad7SLin Ling 11543f9d6ad7SLin Ling (void) snprintf(name, sizeof (name), "%llx", (longlong_t)key); 11553f9d6ad7SLin Ling return (zap_lookup(os, obj, name, 8, 1, valuep)); 11563f9d6ad7SLin Ling } 11573f9d6ad7SLin Ling 11583f9d6ad7SLin Ling int 11593f9d6ad7SLin Ling zap_increment(objset_t *os, uint64_t obj, const char *name, int64_t delta, 11603f9d6ad7SLin Ling dmu_tx_t *tx) 11613f9d6ad7SLin Ling { 11629966ca11SMatthew Ahrens uint64_t value = 0; 11639966ca11SMatthew Ahrens 11649966ca11SMatthew Ahrens if (delta == 0) 11659966ca11SMatthew Ahrens return (0); 11669966ca11SMatthew Ahrens 1167bf26014cSMatthew Ahrens int err = zap_lookup(os, obj, name, 8, 1, &value); 11689966ca11SMatthew Ahrens if (err != 0 && err != ENOENT) 11699966ca11SMatthew Ahrens return (err); 11709966ca11SMatthew Ahrens value += delta; 11719966ca11SMatthew Ahrens if (value == 0) 11729966ca11SMatthew Ahrens err = zap_remove(os, obj, name, tx); 11739966ca11SMatthew Ahrens else 11749966ca11SMatthew Ahrens err = zap_update(os, obj, name, 8, 1, &value, tx); 11759966ca11SMatthew Ahrens return (err); 11769966ca11SMatthew Ahrens } 11779966ca11SMatthew Ahrens 11783f9d6ad7SLin Ling int 11793f9d6ad7SLin Ling zap_increment_int(objset_t *os, uint64_t obj, uint64_t key, int64_t delta, 11803f9d6ad7SLin Ling dmu_tx_t *tx) 11813f9d6ad7SLin Ling { 11823f9d6ad7SLin Ling char name[20]; 11833f9d6ad7SLin Ling 11843f9d6ad7SLin Ling (void) snprintf(name, sizeof (name), "%llx", (longlong_t)key); 11853f9d6ad7SLin Ling return (zap_increment(os, obj, name, delta, tx)); 11863f9d6ad7SLin Ling } 11879966ca11SMatthew Ahrens 1188fa9e4066Sahrens /* 1189fa9e4066Sahrens * Routines for iterating over the attributes. 1190fa9e4066Sahrens */ 1191fa9e4066Sahrens 1192fa9e4066Sahrens int 1193fa9e4066Sahrens fzap_cursor_retrieve(zap_t *zap, zap_cursor_t *zc, zap_attribute_t *za) 1194fa9e4066Sahrens { 1195fa9e4066Sahrens int err = ENOENT; 1196fa9e4066Sahrens zap_entry_handle_t zeh; 1197fa9e4066Sahrens zap_leaf_t *l; 1198fa9e4066Sahrens 1199fa9e4066Sahrens /* retrieve the next entry at or after zc_hash/zc_cd */ 1200fa9e4066Sahrens /* if no entry, return ENOENT */ 1201fa9e4066Sahrens 1202*52abb70eSMatthew Ahrens /* 1203*52abb70eSMatthew Ahrens * If we are reading from the beginning, we're almost 1204*52abb70eSMatthew Ahrens * certain to iterate over the entire ZAP object. If there are 1205*52abb70eSMatthew Ahrens * multiple leaf blocks (freeblk > 2), prefetch the whole 1206*52abb70eSMatthew Ahrens * object, so that we read the leaf blocks concurrently. 1207*52abb70eSMatthew Ahrens * (Unless noprefetch was requested via zap_cursor_init_noprefetch()). 1208*52abb70eSMatthew Ahrens */ 1209*52abb70eSMatthew Ahrens if (zc->zc_hash == 0 && zap_iterate_prefetch && 1210*52abb70eSMatthew Ahrens zc->zc_prefetch && zap_f_phys(zap)->zap_freeblk > 2) { 1211*52abb70eSMatthew Ahrens dmu_prefetch(zc->zc_objset, zc->zc_zapobj, 0, 0, 1212*52abb70eSMatthew Ahrens zap_f_phys(zap)->zap_freeblk << FZAP_BLOCK_SHIFT(zap), 1213*52abb70eSMatthew Ahrens ZIO_PRIORITY_ASYNC_READ); 1214*52abb70eSMatthew Ahrens } 1215*52abb70eSMatthew Ahrens 121687e5029aSahrens if (zc->zc_leaf && 121766328dd3Sahrens (ZAP_HASH_IDX(zc->zc_hash, 1218c1379625SJustin T. Gibbs zap_leaf_phys(zc->zc_leaf)->l_hdr.lh_prefix_len) != 1219c1379625SJustin T. Gibbs zap_leaf_phys(zc->zc_leaf)->l_hdr.lh_prefix)) { 122087e5029aSahrens rw_enter(&zc->zc_leaf->l_rwlock, RW_READER); 122187e5029aSahrens zap_put_leaf(zc->zc_leaf); 122287e5029aSahrens zc->zc_leaf = NULL; 122387e5029aSahrens } 122487e5029aSahrens 1225fa9e4066Sahrens again: 122687e5029aSahrens if (zc->zc_leaf == NULL) { 1227ea8dc4b6Seschrock err = zap_deref_leaf(zap, zc->zc_hash, NULL, RW_READER, 1228ea8dc4b6Seschrock &zc->zc_leaf); 1229ea8dc4b6Seschrock if (err != 0) 1230ea8dc4b6Seschrock return (err); 123187e5029aSahrens } else { 123287e5029aSahrens rw_enter(&zc->zc_leaf->l_rwlock, RW_READER); 123387e5029aSahrens } 123487e5029aSahrens l = zc->zc_leaf; 123587e5029aSahrens 1236fa9e4066Sahrens err = zap_leaf_lookup_closest(l, zc->zc_hash, zc->zc_cd, &zeh); 1237fa9e4066Sahrens 1238fa9e4066Sahrens if (err == ENOENT) { 123966328dd3Sahrens uint64_t nocare = 1240c1379625SJustin T. Gibbs (1ULL << (64 - zap_leaf_phys(l)->l_hdr.lh_prefix_len)) - 1; 1241fa9e4066Sahrens zc->zc_hash = (zc->zc_hash & ~nocare) + nocare + 1; 1242fa9e4066Sahrens zc->zc_cd = 0; 1243c1379625SJustin T. Gibbs if (zap_leaf_phys(l)->l_hdr.lh_prefix_len == 0 || 1244c1379625SJustin T. Gibbs zc->zc_hash == 0) { 1245fa9e4066Sahrens zc->zc_hash = -1ULL; 1246fa9e4066Sahrens } else { 124787e5029aSahrens zap_put_leaf(zc->zc_leaf); 124887e5029aSahrens zc->zc_leaf = NULL; 1249fa9e4066Sahrens goto again; 1250fa9e4066Sahrens } 1251fa9e4066Sahrens } 1252fa9e4066Sahrens 1253fa9e4066Sahrens if (err == 0) { 1254fa9e4066Sahrens zc->zc_hash = zeh.zeh_hash; 1255fa9e4066Sahrens zc->zc_cd = zeh.zeh_cd; 1256fa9e4066Sahrens za->za_integer_length = zeh.zeh_integer_size; 1257fa9e4066Sahrens za->za_num_integers = zeh.zeh_num_integers; 1258fa9e4066Sahrens if (zeh.zeh_num_integers == 0) { 1259fa9e4066Sahrens za->za_first_integer = 0; 1260fa9e4066Sahrens } else { 1261fa9e4066Sahrens err = zap_entry_read(&zeh, 8, 1, &za->za_first_integer); 1262fa9e4066Sahrens ASSERT(err == 0 || err == EOVERFLOW); 1263fa9e4066Sahrens } 1264b24ab676SJeff Bonwick err = zap_entry_read_name(zap, &zeh, 1265fa9e4066Sahrens sizeof (za->za_name), za->za_name); 1266fa9e4066Sahrens ASSERT(err == 0); 1267da6c28aaSamw 1268da6c28aaSamw za->za_normalization_conflict = 1269da6c28aaSamw zap_entry_normalization_conflict(&zeh, 1270da6c28aaSamw NULL, za->za_name, zap); 1271fa9e4066Sahrens } 127287e5029aSahrens rw_exit(&zc->zc_leaf->l_rwlock); 1273fa9e4066Sahrens return (err); 1274fa9e4066Sahrens } 1275fa9e4066Sahrens 1276fa9e4066Sahrens static void 1277fa9e4066Sahrens zap_stats_ptrtbl(zap_t *zap, uint64_t *tbl, int len, zap_stats_t *zs) 1278fa9e4066Sahrens { 1279fa9e4066Sahrens uint64_t lastblk = 0; 1280fa9e4066Sahrens 1281fa9e4066Sahrens /* 1282fa9e4066Sahrens * NB: if a leaf has more pointers than an entire ptrtbl block 1283fa9e4066Sahrens * can hold, then it'll be accounted for more than once, since 1284fa9e4066Sahrens * we won't have lastblk. 1285fa9e4066Sahrens */ 1286bf26014cSMatthew Ahrens for (int i = 0; i < len; i++) { 1287fa9e4066Sahrens zap_leaf_t *l; 1288fa9e4066Sahrens 1289fa9e4066Sahrens if (tbl[i] == lastblk) 1290fa9e4066Sahrens continue; 1291fa9e4066Sahrens lastblk = tbl[i]; 1292fa9e4066Sahrens 1293bf26014cSMatthew Ahrens int err = zap_get_leaf_byblk(zap, tbl[i], NULL, RW_READER, &l); 1294ea8dc4b6Seschrock if (err == 0) { 129566328dd3Sahrens zap_leaf_stats(zap, l, zs); 1296ea8dc4b6Seschrock zap_put_leaf(l); 1297ea8dc4b6Seschrock } 1298fa9e4066Sahrens } 1299fa9e4066Sahrens } 1300fa9e4066Sahrens 1301fa9e4066Sahrens void 1302fa9e4066Sahrens fzap_get_stats(zap_t *zap, zap_stats_t *zs) 1303fa9e4066Sahrens { 1304f65e61c0Sahrens int bs = FZAP_BLOCK_SHIFT(zap); 1305f65e61c0Sahrens zs->zs_blocksize = 1ULL << bs; 13068248818dSnd 13078248818dSnd /* 13088248818dSnd * Set zap_phys_t fields 13098248818dSnd */ 1310c1379625SJustin T. Gibbs zs->zs_num_leafs = zap_f_phys(zap)->zap_num_leafs; 1311c1379625SJustin T. Gibbs zs->zs_num_entries = zap_f_phys(zap)->zap_num_entries; 1312c1379625SJustin T. Gibbs zs->zs_num_blocks = zap_f_phys(zap)->zap_freeblk; 1313c1379625SJustin T. Gibbs zs->zs_block_type = zap_f_phys(zap)->zap_block_type; 1314c1379625SJustin T. Gibbs zs->zs_magic = zap_f_phys(zap)->zap_magic; 1315c1379625SJustin T. Gibbs zs->zs_salt = zap_f_phys(zap)->zap_salt; 13168248818dSnd 13178248818dSnd /* 13188248818dSnd * Set zap_ptrtbl fields 13198248818dSnd */ 1320c1379625SJustin T. Gibbs zs->zs_ptrtbl_len = 1ULL << zap_f_phys(zap)->zap_ptrtbl.zt_shift; 1321c1379625SJustin T. Gibbs zs->zs_ptrtbl_nextblk = zap_f_phys(zap)->zap_ptrtbl.zt_nextblk; 13228248818dSnd zs->zs_ptrtbl_blks_copied = 1323c1379625SJustin T. Gibbs zap_f_phys(zap)->zap_ptrtbl.zt_blks_copied; 1324c1379625SJustin T. Gibbs zs->zs_ptrtbl_zt_blk = zap_f_phys(zap)->zap_ptrtbl.zt_blk; 1325c1379625SJustin T. Gibbs zs->zs_ptrtbl_zt_numblks = zap_f_phys(zap)->zap_ptrtbl.zt_numblks; 1326c1379625SJustin T. Gibbs zs->zs_ptrtbl_zt_shift = zap_f_phys(zap)->zap_ptrtbl.zt_shift; 1327fa9e4066Sahrens 1328c1379625SJustin T. Gibbs if (zap_f_phys(zap)->zap_ptrtbl.zt_numblks == 0) { 1329fa9e4066Sahrens /* the ptrtbl is entirely in the header block. */ 1330f65e61c0Sahrens zap_stats_ptrtbl(zap, &ZAP_EMBEDDED_PTRTBL_ENT(zap, 0), 1331f65e61c0Sahrens 1 << ZAP_EMBEDDED_PTRTBL_SHIFT(zap), zs); 1332fa9e4066Sahrens } else { 1333a2cdcdd2SPaul Dagnelie dmu_prefetch(zap->zap_objset, zap->zap_object, 0, 1334c1379625SJustin T. Gibbs zap_f_phys(zap)->zap_ptrtbl.zt_blk << bs, 1335a2cdcdd2SPaul Dagnelie zap_f_phys(zap)->zap_ptrtbl.zt_numblks << bs, 1336a2cdcdd2SPaul Dagnelie ZIO_PRIORITY_SYNC_READ); 1337fa9e4066Sahrens 1338bf26014cSMatthew Ahrens for (int b = 0; b < zap_f_phys(zap)->zap_ptrtbl.zt_numblks; 1339fa9e4066Sahrens b++) { 1340fa9e4066Sahrens dmu_buf_t *db; 1341ea8dc4b6Seschrock int err; 1342ea8dc4b6Seschrock 1343ea8dc4b6Seschrock err = dmu_buf_hold(zap->zap_objset, zap->zap_object, 1344c1379625SJustin T. Gibbs (zap_f_phys(zap)->zap_ptrtbl.zt_blk + b) << bs, 134547cb52daSJeff Bonwick FTAG, &db, DMU_READ_NO_PREFETCH); 1346ea8dc4b6Seschrock if (err == 0) { 1347ea8dc4b6Seschrock zap_stats_ptrtbl(zap, db->db_data, 1348ea8dc4b6Seschrock 1<<(bs-3), zs); 1349ea8dc4b6Seschrock dmu_buf_rele(db, FTAG); 1350ea8dc4b6Seschrock } 1351fa9e4066Sahrens } 1352fa9e4066Sahrens } 1353fa9e4066Sahrens } 1354