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 /* 22*47cb52daSJeff Bonwick * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 23fa9e4066Sahrens */ 24fa9e4066Sahrens 25fa9e4066Sahrens /* 26fa9e4066Sahrens * This file contains the top half of the zfs directory structure 27fa9e4066Sahrens * implementation. The bottom half is in zap_leaf.c. 28fa9e4066Sahrens * 29fa9e4066Sahrens * The zdir is an extendable hash data structure. There is a table of 30fa9e4066Sahrens * pointers to buckets (zap_t->zd_data->zd_leafs). The buckets are 31fa9e4066Sahrens * each a constant size and hold a variable number of directory entries. 32fa9e4066Sahrens * The buckets (aka "leaf nodes") are implemented in zap_leaf.c. 33fa9e4066Sahrens * 34fa9e4066Sahrens * The pointer table holds a power of 2 number of pointers. 35fa9e4066Sahrens * (1<<zap_t->zd_data->zd_phys->zd_prefix_len). The bucket pointed to 36fa9e4066Sahrens * by the pointer at index i in the table holds entries whose hash value 37fa9e4066Sahrens * has a zd_prefix_len - bit prefix 38fa9e4066Sahrens */ 39fa9e4066Sahrens 40fa9e4066Sahrens #include <sys/spa.h> 41fa9e4066Sahrens #include <sys/dmu.h> 42fa9e4066Sahrens #include <sys/zfs_context.h> 43de8267e0Stimh #include <sys/zfs_znode.h> 44478ed9adSEric Taylor #include <sys/fs/zfs.h> 45fa9e4066Sahrens #include <sys/zap.h> 46ea8dc4b6Seschrock #include <sys/refcount.h> 47fa9e4066Sahrens #include <sys/zap_impl.h> 48fa9e4066Sahrens #include <sys/zap_leaf.h> 49fa9e4066Sahrens 50f65e61c0Sahrens int fzap_default_block_shift = 14; /* 16k blocksize */ 51fa9e4066Sahrens 52fa9e4066Sahrens static void zap_leaf_pageout(dmu_buf_t *db, void *vl); 5366328dd3Sahrens static uint64_t zap_allocate_blocks(zap_t *zap, int nblocks); 54fa9e4066Sahrens 55fa9e4066Sahrens 56fa9e4066Sahrens void 57fa9e4066Sahrens fzap_byteswap(void *vbuf, size_t size) 58fa9e4066Sahrens { 59fa9e4066Sahrens uint64_t block_type; 60fa9e4066Sahrens 61fa9e4066Sahrens 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 dmu_buf_t *db; 75fa9e4066Sahrens zap_leaf_t *l; 76fa9e4066Sahrens int i; 77fa9e4066Sahrens zap_phys_t *zp; 78fa9e4066Sahrens 79fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 80fa9e4066Sahrens zap->zap_ismicro = FALSE; 81fa9e4066Sahrens 82fa9e4066Sahrens (void) dmu_buf_update_user(zap->zap_dbuf, zap, zap, 83455d5089Sahrens &zap->zap_f.zap_phys, zap_evict); 84fa9e4066Sahrens 85fa9e4066Sahrens mutex_init(&zap->zap_f.zap_num_entries_mtx, 0, 0, 0); 86f65e61c0Sahrens zap->zap_f.zap_block_shift = highbit(zap->zap_dbuf->db_size) - 1; 87fa9e4066Sahrens 88fa9e4066Sahrens zp = zap->zap_f.zap_phys; 89fa9e4066Sahrens /* 90fa9e4066Sahrens * explicitly zero it since it might be coming from an 91fa9e4066Sahrens * initialized microzap 92fa9e4066Sahrens */ 93f65e61c0Sahrens bzero(zap->zap_dbuf->db_data, zap->zap_dbuf->db_size); 94fa9e4066Sahrens zp->zap_block_type = ZBT_HEADER; 95fa9e4066Sahrens zp->zap_magic = ZAP_MAGIC; 96fa9e4066Sahrens 97f65e61c0Sahrens zp->zap_ptrtbl.zt_shift = ZAP_EMBEDDED_PTRTBL_SHIFT(zap); 98fa9e4066Sahrens 99fa9e4066Sahrens zp->zap_freeblk = 2; /* block 1 will be the first leaf */ 100fa9e4066Sahrens zp->zap_num_leafs = 1; 101fa9e4066Sahrens zp->zap_num_entries = 0; 102fa9e4066Sahrens zp->zap_salt = zap->zap_salt; 103da6c28aaSamw zp->zap_normflags = zap->zap_normflags; 104b24ab676SJeff Bonwick zp->zap_flags = flags; 105fa9e4066Sahrens 106f65e61c0Sahrens /* block 1 will be the first leaf */ 107f65e61c0Sahrens for (i = 0; i < (1<<zp->zap_ptrtbl.zt_shift); i++) 108f65e61c0Sahrens ZAP_EMBEDDED_PTRTBL_ENT(zap, i) = 1; 109fa9e4066Sahrens 110fa9e4066Sahrens /* 111fa9e4066Sahrens * set up block 1 - the first leaf 112fa9e4066Sahrens */ 113ea8dc4b6Seschrock VERIFY(0 == dmu_buf_hold(zap->zap_objset, zap->zap_object, 114*47cb52daSJeff Bonwick 1<<FZAP_BLOCK_SHIFT(zap), FTAG, &db, DMU_READ_NO_PREFETCH)); 115fa9e4066Sahrens dmu_buf_will_dirty(db, tx); 116fa9e4066Sahrens 117fa9e4066Sahrens l = kmem_zalloc(sizeof (zap_leaf_t), KM_SLEEP); 118fa9e4066Sahrens l->l_dbuf = db; 119fa9e4066Sahrens l->l_phys = db->db_data; 120fa9e4066Sahrens 121de8267e0Stimh zap_leaf_init(l, zp->zap_normflags != 0); 122fa9e4066Sahrens 123fa9e4066Sahrens kmem_free(l, sizeof (zap_leaf_t)); 124ea8dc4b6Seschrock dmu_buf_rele(db, FTAG); 125fa9e4066Sahrens } 126fa9e4066Sahrens 127fa9e4066Sahrens static int 128fa9e4066Sahrens zap_tryupgradedir(zap_t *zap, dmu_tx_t *tx) 129fa9e4066Sahrens { 130fa9e4066Sahrens if (RW_WRITE_HELD(&zap->zap_rwlock)) 131fa9e4066Sahrens return (1); 132fa9e4066Sahrens if (rw_tryupgrade(&zap->zap_rwlock)) { 133fa9e4066Sahrens dmu_buf_will_dirty(zap->zap_dbuf, tx); 134fa9e4066Sahrens return (1); 135fa9e4066Sahrens } 136fa9e4066Sahrens return (0); 137fa9e4066Sahrens } 138fa9e4066Sahrens 139fa9e4066Sahrens /* 140fa9e4066Sahrens * Generic routines for dealing with the pointer & cookie tables. 141fa9e4066Sahrens */ 142fa9e4066Sahrens 14366328dd3Sahrens static int 144fa9e4066Sahrens zap_table_grow(zap_t *zap, zap_table_phys_t *tbl, 145fa9e4066Sahrens void (*transfer_func)(const uint64_t *src, uint64_t *dst, int n), 146fa9e4066Sahrens dmu_tx_t *tx) 147fa9e4066Sahrens { 148fa9e4066Sahrens uint64_t b, newblk; 149fa9e4066Sahrens dmu_buf_t *db_old, *db_new; 150ea8dc4b6Seschrock int err; 151f65e61c0Sahrens int bs = FZAP_BLOCK_SHIFT(zap); 152f65e61c0Sahrens int hepb = 1<<(bs-4); 153fa9e4066Sahrens /* hepb = half the number of entries in a block */ 154fa9e4066Sahrens 155fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 156fa9e4066Sahrens ASSERT(tbl->zt_blk != 0); 157fa9e4066Sahrens ASSERT(tbl->zt_numblks > 0); 158fa9e4066Sahrens 159fa9e4066Sahrens if (tbl->zt_nextblk != 0) { 160fa9e4066Sahrens newblk = tbl->zt_nextblk; 161fa9e4066Sahrens } else { 16266328dd3Sahrens newblk = zap_allocate_blocks(zap, tbl->zt_numblks * 2); 163fa9e4066Sahrens tbl->zt_nextblk = newblk; 164fa9e4066Sahrens ASSERT3U(tbl->zt_blks_copied, ==, 0); 165fa9e4066Sahrens dmu_prefetch(zap->zap_objset, zap->zap_object, 166f65e61c0Sahrens tbl->zt_blk << bs, tbl->zt_numblks << bs); 167fa9e4066Sahrens } 168fa9e4066Sahrens 169fa9e4066Sahrens /* 17066328dd3Sahrens * Copy the ptrtbl from the old to new location. 171fa9e4066Sahrens */ 172fa9e4066Sahrens 173fa9e4066Sahrens b = tbl->zt_blks_copied; 174ea8dc4b6Seschrock err = dmu_buf_hold(zap->zap_objset, zap->zap_object, 175*47cb52daSJeff Bonwick (tbl->zt_blk + b) << bs, FTAG, &db_old, DMU_READ_NO_PREFETCH); 176ea8dc4b6Seschrock if (err) 17766328dd3Sahrens return (err); 178fa9e4066Sahrens 179fa9e4066Sahrens /* first half of entries in old[b] go to new[2*b+0] */ 180ea8dc4b6Seschrock VERIFY(0 == dmu_buf_hold(zap->zap_objset, zap->zap_object, 181*47cb52daSJeff Bonwick (newblk + 2*b+0) << bs, FTAG, &db_new, DMU_READ_NO_PREFETCH)); 182fa9e4066Sahrens dmu_buf_will_dirty(db_new, tx); 183fa9e4066Sahrens transfer_func(db_old->db_data, db_new->db_data, hepb); 184ea8dc4b6Seschrock dmu_buf_rele(db_new, FTAG); 185fa9e4066Sahrens 186fa9e4066Sahrens /* second half of entries in old[b] go to new[2*b+1] */ 187ea8dc4b6Seschrock VERIFY(0 == dmu_buf_hold(zap->zap_objset, zap->zap_object, 188*47cb52daSJeff Bonwick (newblk + 2*b+1) << bs, FTAG, &db_new, DMU_READ_NO_PREFETCH)); 189fa9e4066Sahrens dmu_buf_will_dirty(db_new, tx); 190fa9e4066Sahrens transfer_func((uint64_t *)db_old->db_data + hepb, 191fa9e4066Sahrens db_new->db_data, hepb); 192ea8dc4b6Seschrock dmu_buf_rele(db_new, FTAG); 193fa9e4066Sahrens 194ea8dc4b6Seschrock dmu_buf_rele(db_old, FTAG); 195fa9e4066Sahrens 196fa9e4066Sahrens tbl->zt_blks_copied++; 197fa9e4066Sahrens 198fa9e4066Sahrens dprintf("copied block %llu of %llu\n", 199fa9e4066Sahrens tbl->zt_blks_copied, tbl->zt_numblks); 200fa9e4066Sahrens 201fa9e4066Sahrens if (tbl->zt_blks_copied == tbl->zt_numblks) { 202ea8dc4b6Seschrock (void) dmu_free_range(zap->zap_objset, zap->zap_object, 203f65e61c0Sahrens tbl->zt_blk << bs, tbl->zt_numblks << bs, tx); 204fa9e4066Sahrens 205fa9e4066Sahrens tbl->zt_blk = newblk; 206fa9e4066Sahrens tbl->zt_numblks *= 2; 207fa9e4066Sahrens tbl->zt_shift++; 208fa9e4066Sahrens tbl->zt_nextblk = 0; 209fa9e4066Sahrens tbl->zt_blks_copied = 0; 210fa9e4066Sahrens 211fa9e4066Sahrens dprintf("finished; numblocks now %llu (%lluk entries)\n", 212fa9e4066Sahrens tbl->zt_numblks, 1<<(tbl->zt_shift-10)); 213fa9e4066Sahrens } 21466328dd3Sahrens 21566328dd3Sahrens return (0); 216fa9e4066Sahrens } 217fa9e4066Sahrens 218ea8dc4b6Seschrock static int 219fa9e4066Sahrens zap_table_store(zap_t *zap, zap_table_phys_t *tbl, uint64_t idx, uint64_t val, 220fa9e4066Sahrens dmu_tx_t *tx) 221fa9e4066Sahrens { 222ea8dc4b6Seschrock int err; 223ea8dc4b6Seschrock uint64_t blk, off; 224f65e61c0Sahrens int bs = FZAP_BLOCK_SHIFT(zap); 225ea8dc4b6Seschrock dmu_buf_t *db; 226fa9e4066Sahrens 227fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 228fa9e4066Sahrens ASSERT(tbl->zt_blk != 0); 229fa9e4066Sahrens 230fa9e4066Sahrens dprintf("storing %llx at index %llx\n", val, idx); 231fa9e4066Sahrens 232f65e61c0Sahrens blk = idx >> (bs-3); 233f65e61c0Sahrens off = idx & ((1<<(bs-3))-1); 234fa9e4066Sahrens 235ea8dc4b6Seschrock err = dmu_buf_hold(zap->zap_objset, zap->zap_object, 236*47cb52daSJeff Bonwick (tbl->zt_blk + blk) << bs, FTAG, &db, DMU_READ_NO_PREFETCH); 237ea8dc4b6Seschrock if (err) 238ea8dc4b6Seschrock return (err); 239fa9e4066Sahrens dmu_buf_will_dirty(db, tx); 240fa9e4066Sahrens 241fa9e4066Sahrens if (tbl->zt_nextblk != 0) { 242ea8dc4b6Seschrock uint64_t idx2 = idx * 2; 243ea8dc4b6Seschrock uint64_t blk2 = idx2 >> (bs-3); 244ea8dc4b6Seschrock uint64_t off2 = idx2 & ((1<<(bs-3))-1); 245ea8dc4b6Seschrock dmu_buf_t *db2; 246ea8dc4b6Seschrock 247ea8dc4b6Seschrock err = dmu_buf_hold(zap->zap_objset, zap->zap_object, 248*47cb52daSJeff Bonwick (tbl->zt_nextblk + blk2) << bs, FTAG, &db2, 249*47cb52daSJeff Bonwick DMU_READ_NO_PREFETCH); 250ea8dc4b6Seschrock if (err) { 251ea8dc4b6Seschrock dmu_buf_rele(db, FTAG); 252ea8dc4b6Seschrock return (err); 253ea8dc4b6Seschrock } 254ea8dc4b6Seschrock dmu_buf_will_dirty(db2, tx); 255ea8dc4b6Seschrock ((uint64_t *)db2->db_data)[off2] = val; 256ea8dc4b6Seschrock ((uint64_t *)db2->db_data)[off2+1] = val; 257ea8dc4b6Seschrock dmu_buf_rele(db2, FTAG); 258fa9e4066Sahrens } 259fa9e4066Sahrens 260ea8dc4b6Seschrock ((uint64_t *)db->db_data)[off] = val; 261ea8dc4b6Seschrock dmu_buf_rele(db, FTAG); 262ea8dc4b6Seschrock 263ea8dc4b6Seschrock return (0); 264fa9e4066Sahrens } 265fa9e4066Sahrens 266ea8dc4b6Seschrock static int 267ea8dc4b6Seschrock zap_table_load(zap_t *zap, zap_table_phys_t *tbl, uint64_t idx, uint64_t *valp) 268fa9e4066Sahrens { 269ea8dc4b6Seschrock uint64_t blk, off; 270ea8dc4b6Seschrock int err; 271fa9e4066Sahrens dmu_buf_t *db; 272f65e61c0Sahrens int bs = FZAP_BLOCK_SHIFT(zap); 273fa9e4066Sahrens 274fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 275fa9e4066Sahrens 276f65e61c0Sahrens blk = idx >> (bs-3); 277f65e61c0Sahrens off = idx & ((1<<(bs-3))-1); 278fa9e4066Sahrens 279ea8dc4b6Seschrock err = dmu_buf_hold(zap->zap_objset, zap->zap_object, 280*47cb52daSJeff Bonwick (tbl->zt_blk + blk) << bs, FTAG, &db, DMU_READ_NO_PREFETCH); 281ea8dc4b6Seschrock if (err) 282ea8dc4b6Seschrock return (err); 283ea8dc4b6Seschrock *valp = ((uint64_t *)db->db_data)[off]; 284ea8dc4b6Seschrock dmu_buf_rele(db, FTAG); 285ea8dc4b6Seschrock 286ea8dc4b6Seschrock if (tbl->zt_nextblk != 0) { 287ea8dc4b6Seschrock /* 288ea8dc4b6Seschrock * read the nextblk for the sake of i/o error checking, 289ea8dc4b6Seschrock * so that zap_table_load() will catch errors for 290ea8dc4b6Seschrock * zap_table_store. 291ea8dc4b6Seschrock */ 292ea8dc4b6Seschrock blk = (idx*2) >> (bs-3); 293ea8dc4b6Seschrock 294ea8dc4b6Seschrock err = dmu_buf_hold(zap->zap_objset, zap->zap_object, 295*47cb52daSJeff Bonwick (tbl->zt_nextblk + blk) << bs, FTAG, &db, 296*47cb52daSJeff Bonwick DMU_READ_NO_PREFETCH); 297ea8dc4b6Seschrock dmu_buf_rele(db, FTAG); 298ea8dc4b6Seschrock } 299ea8dc4b6Seschrock return (err); 300fa9e4066Sahrens } 301fa9e4066Sahrens 302fa9e4066Sahrens /* 303fa9e4066Sahrens * Routines for growing the ptrtbl. 304fa9e4066Sahrens */ 305fa9e4066Sahrens 306fa9e4066Sahrens static void 307fa9e4066Sahrens zap_ptrtbl_transfer(const uint64_t *src, uint64_t *dst, int n) 308fa9e4066Sahrens { 309fa9e4066Sahrens int i; 310fa9e4066Sahrens for (i = 0; i < n; i++) { 311fa9e4066Sahrens uint64_t lb = src[i]; 312fa9e4066Sahrens dst[2*i+0] = lb; 313fa9e4066Sahrens dst[2*i+1] = lb; 314fa9e4066Sahrens } 315fa9e4066Sahrens } 316fa9e4066Sahrens 31766328dd3Sahrens static int 318fa9e4066Sahrens zap_grow_ptrtbl(zap_t *zap, dmu_tx_t *tx) 319fa9e4066Sahrens { 320b24ab676SJeff Bonwick /* 321b24ab676SJeff Bonwick * The pointer table should never use more hash bits than we 322b24ab676SJeff Bonwick * have (otherwise we'd be using useless zero bits to index it). 323b24ab676SJeff Bonwick * If we are within 2 bits of running out, stop growing, since 324b24ab676SJeff Bonwick * this is already an aberrant condition. 325b24ab676SJeff Bonwick */ 326b24ab676SJeff Bonwick if (zap->zap_f.zap_phys->zap_ptrtbl.zt_shift >= zap_hashbits(zap) - 2) 32766328dd3Sahrens return (ENOSPC); 328fa9e4066Sahrens 329fa9e4066Sahrens if (zap->zap_f.zap_phys->zap_ptrtbl.zt_numblks == 0) { 330fa9e4066Sahrens /* 331f65e61c0Sahrens * We are outgrowing the "embedded" ptrtbl (the one 332f65e61c0Sahrens * stored in the header block). Give it its own entire 333f65e61c0Sahrens * block, which will double the size of the ptrtbl. 334fa9e4066Sahrens */ 335fa9e4066Sahrens uint64_t newblk; 336fa9e4066Sahrens dmu_buf_t *db_new; 337ea8dc4b6Seschrock int err; 338fa9e4066Sahrens 339fa9e4066Sahrens ASSERT3U(zap->zap_f.zap_phys->zap_ptrtbl.zt_shift, ==, 340f65e61c0Sahrens ZAP_EMBEDDED_PTRTBL_SHIFT(zap)); 341fa9e4066Sahrens ASSERT3U(zap->zap_f.zap_phys->zap_ptrtbl.zt_blk, ==, 0); 342fa9e4066Sahrens 34366328dd3Sahrens newblk = zap_allocate_blocks(zap, 1); 344ea8dc4b6Seschrock err = dmu_buf_hold(zap->zap_objset, zap->zap_object, 345*47cb52daSJeff Bonwick newblk << FZAP_BLOCK_SHIFT(zap), FTAG, &db_new, 346*47cb52daSJeff Bonwick DMU_READ_NO_PREFETCH); 347ea8dc4b6Seschrock if (err) 34866328dd3Sahrens return (err); 349fa9e4066Sahrens dmu_buf_will_dirty(db_new, tx); 350f65e61c0Sahrens zap_ptrtbl_transfer(&ZAP_EMBEDDED_PTRTBL_ENT(zap, 0), 351f65e61c0Sahrens db_new->db_data, 1 << ZAP_EMBEDDED_PTRTBL_SHIFT(zap)); 352ea8dc4b6Seschrock dmu_buf_rele(db_new, FTAG); 353fa9e4066Sahrens 354fa9e4066Sahrens zap->zap_f.zap_phys->zap_ptrtbl.zt_blk = newblk; 355fa9e4066Sahrens zap->zap_f.zap_phys->zap_ptrtbl.zt_numblks = 1; 356fa9e4066Sahrens zap->zap_f.zap_phys->zap_ptrtbl.zt_shift++; 357fa9e4066Sahrens 358fa9e4066Sahrens ASSERT3U(1ULL << zap->zap_f.zap_phys->zap_ptrtbl.zt_shift, ==, 359fa9e4066Sahrens zap->zap_f.zap_phys->zap_ptrtbl.zt_numblks << 360f65e61c0Sahrens (FZAP_BLOCK_SHIFT(zap)-3)); 36166328dd3Sahrens 36266328dd3Sahrens return (0); 363fa9e4066Sahrens } else { 36466328dd3Sahrens return (zap_table_grow(zap, &zap->zap_f.zap_phys->zap_ptrtbl, 36566328dd3Sahrens zap_ptrtbl_transfer, tx)); 366fa9e4066Sahrens } 367fa9e4066Sahrens } 368fa9e4066Sahrens 369fa9e4066Sahrens static void 370fa9e4066Sahrens zap_increment_num_entries(zap_t *zap, int delta, dmu_tx_t *tx) 371fa9e4066Sahrens { 372fa9e4066Sahrens dmu_buf_will_dirty(zap->zap_dbuf, tx); 373fa9e4066Sahrens mutex_enter(&zap->zap_f.zap_num_entries_mtx); 374fa9e4066Sahrens ASSERT(delta > 0 || zap->zap_f.zap_phys->zap_num_entries >= -delta); 375fa9e4066Sahrens zap->zap_f.zap_phys->zap_num_entries += delta; 376fa9e4066Sahrens mutex_exit(&zap->zap_f.zap_num_entries_mtx); 377fa9e4066Sahrens } 378fa9e4066Sahrens 37966328dd3Sahrens static uint64_t 38066328dd3Sahrens zap_allocate_blocks(zap_t *zap, int nblocks) 381fa9e4066Sahrens { 382fa9e4066Sahrens uint64_t newblk; 38366328dd3Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 38466328dd3Sahrens newblk = zap->zap_f.zap_phys->zap_freeblk; 38566328dd3Sahrens zap->zap_f.zap_phys->zap_freeblk += nblocks; 386fa9e4066Sahrens return (newblk); 387fa9e4066Sahrens } 388fa9e4066Sahrens 38966328dd3Sahrens static zap_leaf_t * 390fa9e4066Sahrens zap_create_leaf(zap_t *zap, dmu_tx_t *tx) 391fa9e4066Sahrens { 392fa9e4066Sahrens void *winner; 393fa9e4066Sahrens zap_leaf_t *l = kmem_alloc(sizeof (zap_leaf_t), KM_SLEEP); 394fa9e4066Sahrens 395fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 396fa9e4066Sahrens 397fa9e4066Sahrens rw_init(&l->l_rwlock, 0, 0, 0); 398fa9e4066Sahrens rw_enter(&l->l_rwlock, RW_WRITER); 39966328dd3Sahrens l->l_blkid = zap_allocate_blocks(zap, 1); 400fa9e4066Sahrens l->l_dbuf = NULL; 401fa9e4066Sahrens l->l_phys = NULL; 402fa9e4066Sahrens 403ea8dc4b6Seschrock VERIFY(0 == dmu_buf_hold(zap->zap_objset, zap->zap_object, 404*47cb52daSJeff Bonwick l->l_blkid << FZAP_BLOCK_SHIFT(zap), NULL, &l->l_dbuf, 405*47cb52daSJeff Bonwick DMU_READ_NO_PREFETCH)); 406fa9e4066Sahrens winner = dmu_buf_set_user(l->l_dbuf, l, &l->l_phys, zap_leaf_pageout); 407fa9e4066Sahrens ASSERT(winner == NULL); 408fa9e4066Sahrens dmu_buf_will_dirty(l->l_dbuf, tx); 409fa9e4066Sahrens 410de8267e0Stimh zap_leaf_init(l, zap->zap_normflags != 0); 411fa9e4066Sahrens 41266328dd3Sahrens zap->zap_f.zap_phys->zap_num_leafs++; 413fa9e4066Sahrens 41466328dd3Sahrens return (l); 415fa9e4066Sahrens } 416fa9e4066Sahrens 417fa9e4066Sahrens int 418fa9e4066Sahrens fzap_count(zap_t *zap, uint64_t *count) 419fa9e4066Sahrens { 420fa9e4066Sahrens ASSERT(!zap->zap_ismicro); 421fa9e4066Sahrens mutex_enter(&zap->zap_f.zap_num_entries_mtx); /* unnecessary */ 422fa9e4066Sahrens *count = zap->zap_f.zap_phys->zap_num_entries; 423fa9e4066Sahrens mutex_exit(&zap->zap_f.zap_num_entries_mtx); 424fa9e4066Sahrens return (0); 425fa9e4066Sahrens } 426fa9e4066Sahrens 427fa9e4066Sahrens /* 428fa9e4066Sahrens * Routines for obtaining zap_leaf_t's 429fa9e4066Sahrens */ 430fa9e4066Sahrens 43187e5029aSahrens void 432fa9e4066Sahrens zap_put_leaf(zap_leaf_t *l) 433fa9e4066Sahrens { 434fa9e4066Sahrens rw_exit(&l->l_rwlock); 435ea8dc4b6Seschrock dmu_buf_rele(l->l_dbuf, NULL); 436fa9e4066Sahrens } 437fa9e4066Sahrens 438fa9e4066Sahrens _NOTE(ARGSUSED(0)) 439fa9e4066Sahrens static void 440fa9e4066Sahrens zap_leaf_pageout(dmu_buf_t *db, void *vl) 441fa9e4066Sahrens { 442fa9e4066Sahrens zap_leaf_t *l = vl; 443fa9e4066Sahrens 444fa9e4066Sahrens rw_destroy(&l->l_rwlock); 445fa9e4066Sahrens kmem_free(l, sizeof (zap_leaf_t)); 446fa9e4066Sahrens } 447fa9e4066Sahrens 448fa9e4066Sahrens static zap_leaf_t * 449fa9e4066Sahrens zap_open_leaf(uint64_t blkid, dmu_buf_t *db) 450fa9e4066Sahrens { 451fa9e4066Sahrens zap_leaf_t *l, *winner; 452fa9e4066Sahrens 453fa9e4066Sahrens ASSERT(blkid != 0); 454fa9e4066Sahrens 455fa9e4066Sahrens l = kmem_alloc(sizeof (zap_leaf_t), KM_SLEEP); 456fa9e4066Sahrens rw_init(&l->l_rwlock, 0, 0, 0); 457fa9e4066Sahrens rw_enter(&l->l_rwlock, RW_WRITER); 458fa9e4066Sahrens l->l_blkid = blkid; 459f65e61c0Sahrens l->l_bs = highbit(db->db_size)-1; 460fa9e4066Sahrens l->l_dbuf = db; 461fa9e4066Sahrens l->l_phys = NULL; 462fa9e4066Sahrens 463fa9e4066Sahrens winner = dmu_buf_set_user(db, l, &l->l_phys, zap_leaf_pageout); 464fa9e4066Sahrens 465fa9e4066Sahrens rw_exit(&l->l_rwlock); 466fa9e4066Sahrens if (winner != NULL) { 467fa9e4066Sahrens /* someone else set it first */ 468fa9e4066Sahrens zap_leaf_pageout(NULL, l); 469fa9e4066Sahrens l = winner; 470fa9e4066Sahrens } 471fa9e4066Sahrens 47266328dd3Sahrens /* 47366328dd3Sahrens * lhr_pad was previously used for the next leaf in the leaf 47466328dd3Sahrens * chain. There should be no chained leafs (as we have removed 47566328dd3Sahrens * support for them). 47666328dd3Sahrens */ 47766328dd3Sahrens ASSERT3U(l->l_phys->l_hdr.lh_pad1, ==, 0); 47866328dd3Sahrens 479f65e61c0Sahrens /* 480f65e61c0Sahrens * There should be more hash entries than there can be 481f65e61c0Sahrens * chunks to put in the hash table 482f65e61c0Sahrens */ 483f65e61c0Sahrens ASSERT3U(ZAP_LEAF_HASH_NUMENTRIES(l), >, ZAP_LEAF_NUMCHUNKS(l) / 3); 484f65e61c0Sahrens 485f65e61c0Sahrens /* The chunks should begin at the end of the hash table */ 486f65e61c0Sahrens ASSERT3P(&ZAP_LEAF_CHUNK(l, 0), ==, 487f65e61c0Sahrens &l->l_phys->l_hash[ZAP_LEAF_HASH_NUMENTRIES(l)]); 488f65e61c0Sahrens 489f65e61c0Sahrens /* The chunks should end at the end of the block */ 490f65e61c0Sahrens ASSERT3U((uintptr_t)&ZAP_LEAF_CHUNK(l, ZAP_LEAF_NUMCHUNKS(l)) - 491f65e61c0Sahrens (uintptr_t)l->l_phys, ==, l->l_dbuf->db_size); 492f65e61c0Sahrens 493fa9e4066Sahrens return (l); 494fa9e4066Sahrens } 495fa9e4066Sahrens 496ea8dc4b6Seschrock static int 49766328dd3Sahrens zap_get_leaf_byblk(zap_t *zap, uint64_t blkid, dmu_tx_t *tx, krw_t lt, 498ea8dc4b6Seschrock zap_leaf_t **lp) 499fa9e4066Sahrens { 500fa9e4066Sahrens dmu_buf_t *db; 501fa9e4066Sahrens zap_leaf_t *l; 502f65e61c0Sahrens int bs = FZAP_BLOCK_SHIFT(zap); 503ea8dc4b6Seschrock int err; 504fa9e4066Sahrens 505fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 506fa9e4066Sahrens 507ea8dc4b6Seschrock err = dmu_buf_hold(zap->zap_objset, zap->zap_object, 508*47cb52daSJeff Bonwick blkid << bs, NULL, &db, DMU_READ_NO_PREFETCH); 509ea8dc4b6Seschrock if (err) 510ea8dc4b6Seschrock return (err); 511fa9e4066Sahrens 512fa9e4066Sahrens ASSERT3U(db->db_object, ==, zap->zap_object); 513f65e61c0Sahrens ASSERT3U(db->db_offset, ==, blkid << bs); 514f65e61c0Sahrens ASSERT3U(db->db_size, ==, 1 << bs); 515fa9e4066Sahrens ASSERT(blkid != 0); 516fa9e4066Sahrens 517fa9e4066Sahrens l = dmu_buf_get_user(db); 518fa9e4066Sahrens 519fa9e4066Sahrens if (l == NULL) 520fa9e4066Sahrens l = zap_open_leaf(blkid, db); 521fa9e4066Sahrens 522fa9e4066Sahrens rw_enter(&l->l_rwlock, lt); 523fa9e4066Sahrens /* 524fa9e4066Sahrens * Must lock before dirtying, otherwise l->l_phys could change, 525fa9e4066Sahrens * causing ASSERT below to fail. 526fa9e4066Sahrens */ 527fa9e4066Sahrens if (lt == RW_WRITER) 528fa9e4066Sahrens dmu_buf_will_dirty(db, tx); 529fa9e4066Sahrens ASSERT3U(l->l_blkid, ==, blkid); 530fa9e4066Sahrens ASSERT3P(l->l_dbuf, ==, db); 531fa9e4066Sahrens ASSERT3P(l->l_phys, ==, l->l_dbuf->db_data); 53266328dd3Sahrens ASSERT3U(l->l_phys->l_hdr.lh_block_type, ==, ZBT_LEAF); 53366328dd3Sahrens ASSERT3U(l->l_phys->l_hdr.lh_magic, ==, ZAP_LEAF_MAGIC); 534fa9e4066Sahrens 535ea8dc4b6Seschrock *lp = l; 536ea8dc4b6Seschrock return (0); 537fa9e4066Sahrens } 538fa9e4066Sahrens 539ea8dc4b6Seschrock static int 540ea8dc4b6Seschrock zap_idx_to_blk(zap_t *zap, uint64_t idx, uint64_t *valp) 541fa9e4066Sahrens { 542fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 543fa9e4066Sahrens 544fa9e4066Sahrens if (zap->zap_f.zap_phys->zap_ptrtbl.zt_numblks == 0) { 545fa9e4066Sahrens ASSERT3U(idx, <, 546fa9e4066Sahrens (1ULL << zap->zap_f.zap_phys->zap_ptrtbl.zt_shift)); 547ea8dc4b6Seschrock *valp = ZAP_EMBEDDED_PTRTBL_ENT(zap, idx); 548ea8dc4b6Seschrock return (0); 549fa9e4066Sahrens } else { 550fa9e4066Sahrens return (zap_table_load(zap, &zap->zap_f.zap_phys->zap_ptrtbl, 551ea8dc4b6Seschrock idx, valp)); 552fa9e4066Sahrens } 553fa9e4066Sahrens } 554fa9e4066Sahrens 555ea8dc4b6Seschrock static int 556fa9e4066Sahrens zap_set_idx_to_blk(zap_t *zap, uint64_t idx, uint64_t blk, dmu_tx_t *tx) 557fa9e4066Sahrens { 558fa9e4066Sahrens ASSERT(tx != NULL); 559fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 560fa9e4066Sahrens 561fa9e4066Sahrens if (zap->zap_f.zap_phys->zap_ptrtbl.zt_blk == 0) { 562f65e61c0Sahrens ZAP_EMBEDDED_PTRTBL_ENT(zap, idx) = blk; 563ea8dc4b6Seschrock return (0); 564fa9e4066Sahrens } else { 565ea8dc4b6Seschrock return (zap_table_store(zap, &zap->zap_f.zap_phys->zap_ptrtbl, 566ea8dc4b6Seschrock idx, blk, tx)); 567fa9e4066Sahrens } 568fa9e4066Sahrens } 569fa9e4066Sahrens 570ea8dc4b6Seschrock static int 571ea8dc4b6Seschrock zap_deref_leaf(zap_t *zap, uint64_t h, dmu_tx_t *tx, krw_t lt, zap_leaf_t **lp) 572fa9e4066Sahrens { 573ea8dc4b6Seschrock uint64_t idx, blk; 574ea8dc4b6Seschrock int err; 575fa9e4066Sahrens 576fa9e4066Sahrens ASSERT(zap->zap_dbuf == NULL || 577fa9e4066Sahrens zap->zap_f.zap_phys == zap->zap_dbuf->db_data); 578fa9e4066Sahrens ASSERT3U(zap->zap_f.zap_phys->zap_magic, ==, ZAP_MAGIC); 579fa9e4066Sahrens idx = ZAP_HASH_IDX(h, zap->zap_f.zap_phys->zap_ptrtbl.zt_shift); 580ea8dc4b6Seschrock err = zap_idx_to_blk(zap, idx, &blk); 581ea8dc4b6Seschrock if (err != 0) 582ea8dc4b6Seschrock return (err); 583ea8dc4b6Seschrock err = zap_get_leaf_byblk(zap, blk, tx, lt, lp); 584fa9e4066Sahrens 58566328dd3Sahrens ASSERT(err || ZAP_HASH_IDX(h, (*lp)->l_phys->l_hdr.lh_prefix_len) == 58666328dd3Sahrens (*lp)->l_phys->l_hdr.lh_prefix); 587ea8dc4b6Seschrock return (err); 588fa9e4066Sahrens } 589fa9e4066Sahrens 590ea8dc4b6Seschrock static int 591ad860c82Sbonwick zap_expand_leaf(zap_name_t *zn, zap_leaf_t *l, dmu_tx_t *tx, zap_leaf_t **lp) 592fa9e4066Sahrens { 593ad860c82Sbonwick zap_t *zap = zn->zn_zap; 594ad860c82Sbonwick uint64_t hash = zn->zn_hash; 595fa9e4066Sahrens zap_leaf_t *nl; 596fa9e4066Sahrens int prefix_diff, i, err; 597fa9e4066Sahrens uint64_t sibling; 59866328dd3Sahrens int old_prefix_len = l->l_phys->l_hdr.lh_prefix_len; 599fa9e4066Sahrens 60066328dd3Sahrens ASSERT3U(old_prefix_len, <=, zap->zap_f.zap_phys->zap_ptrtbl.zt_shift); 601fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 602fa9e4066Sahrens 60366328dd3Sahrens ASSERT3U(ZAP_HASH_IDX(hash, old_prefix_len), ==, 60466328dd3Sahrens l->l_phys->l_hdr.lh_prefix); 605fa9e4066Sahrens 60666328dd3Sahrens if (zap_tryupgradedir(zap, tx) == 0 || 60766328dd3Sahrens old_prefix_len == zap->zap_f.zap_phys->zap_ptrtbl.zt_shift) { 60866328dd3Sahrens /* We failed to upgrade, or need to grow the pointer table */ 609fa9e4066Sahrens objset_t *os = zap->zap_objset; 610fa9e4066Sahrens uint64_t object = zap->zap_object; 611fa9e4066Sahrens 612fa9e4066Sahrens zap_put_leaf(l); 613fa9e4066Sahrens zap_unlockdir(zap); 614c5f9e431Sahrens err = zap_lockdir(os, object, tx, RW_WRITER, 615ad860c82Sbonwick FALSE, FALSE, &zn->zn_zap); 616ad860c82Sbonwick zap = zn->zn_zap; 61766328dd3Sahrens if (err) 61866328dd3Sahrens return (err); 619fa9e4066Sahrens ASSERT(!zap->zap_ismicro); 620fa9e4066Sahrens 62166328dd3Sahrens while (old_prefix_len == 62266328dd3Sahrens zap->zap_f.zap_phys->zap_ptrtbl.zt_shift) { 62366328dd3Sahrens err = zap_grow_ptrtbl(zap, tx); 62466328dd3Sahrens if (err) 62566328dd3Sahrens return (err); 62666328dd3Sahrens } 62766328dd3Sahrens 62866328dd3Sahrens err = zap_deref_leaf(zap, hash, tx, RW_WRITER, &l); 62966328dd3Sahrens if (err) 63066328dd3Sahrens return (err); 63166328dd3Sahrens 63266328dd3Sahrens if (l->l_phys->l_hdr.lh_prefix_len != old_prefix_len) { 633fa9e4066Sahrens /* it split while our locks were down */ 634ea8dc4b6Seschrock *lp = l; 635ea8dc4b6Seschrock return (0); 636ea8dc4b6Seschrock } 637fa9e4066Sahrens } 638fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 63966328dd3Sahrens ASSERT3U(old_prefix_len, <, zap->zap_f.zap_phys->zap_ptrtbl.zt_shift); 64066328dd3Sahrens ASSERT3U(ZAP_HASH_IDX(hash, old_prefix_len), ==, 64166328dd3Sahrens l->l_phys->l_hdr.lh_prefix); 642fa9e4066Sahrens 64366328dd3Sahrens prefix_diff = zap->zap_f.zap_phys->zap_ptrtbl.zt_shift - 64466328dd3Sahrens (old_prefix_len + 1); 64566328dd3Sahrens sibling = (ZAP_HASH_IDX(hash, old_prefix_len + 1) | 1) << prefix_diff; 646ea8dc4b6Seschrock 647ea8dc4b6Seschrock /* check for i/o errors before doing zap_leaf_split */ 648fa9e4066Sahrens for (i = 0; i < (1ULL<<prefix_diff); i++) { 649ea8dc4b6Seschrock uint64_t blk; 650ea8dc4b6Seschrock err = zap_idx_to_blk(zap, sibling+i, &blk); 651ea8dc4b6Seschrock if (err) 652ea8dc4b6Seschrock return (err); 653ea8dc4b6Seschrock ASSERT3U(blk, ==, l->l_blkid); 654ea8dc4b6Seschrock } 655ea8dc4b6Seschrock 65666328dd3Sahrens nl = zap_create_leaf(zap, tx); 657de8267e0Stimh zap_leaf_split(l, nl, zap->zap_normflags != 0); 658ea8dc4b6Seschrock 65966328dd3Sahrens /* set sibling pointers */ 660ea8dc4b6Seschrock for (i = 0; i < (1ULL<<prefix_diff); i++) { 661ea8dc4b6Seschrock err = zap_set_idx_to_blk(zap, sibling+i, nl->l_blkid, tx); 662ea8dc4b6Seschrock ASSERT3U(err, ==, 0); /* we checked for i/o errors above */ 663fa9e4066Sahrens } 664fa9e4066Sahrens 66566328dd3Sahrens if (hash & (1ULL << (64 - l->l_phys->l_hdr.lh_prefix_len))) { 666fa9e4066Sahrens /* we want the sibling */ 667fa9e4066Sahrens zap_put_leaf(l); 66866328dd3Sahrens *lp = nl; 669fa9e4066Sahrens } else { 670fa9e4066Sahrens zap_put_leaf(nl); 67166328dd3Sahrens *lp = l; 672fa9e4066Sahrens } 673fa9e4066Sahrens 674ea8dc4b6Seschrock return (0); 675fa9e4066Sahrens } 676fa9e4066Sahrens 677fa9e4066Sahrens static void 678ad860c82Sbonwick zap_put_leaf_maybe_grow_ptrtbl(zap_name_t *zn, zap_leaf_t *l, dmu_tx_t *tx) 679fa9e4066Sahrens { 680ad860c82Sbonwick zap_t *zap = zn->zn_zap; 68166328dd3Sahrens int shift = zap->zap_f.zap_phys->zap_ptrtbl.zt_shift; 68266328dd3Sahrens int leaffull = (l->l_phys->l_hdr.lh_prefix_len == shift && 68366328dd3Sahrens l->l_phys->l_hdr.lh_nfree < ZAP_LEAF_LOW_WATER); 684fa9e4066Sahrens 68566328dd3Sahrens zap_put_leaf(l); 686fa9e4066Sahrens 68766328dd3Sahrens if (leaffull || zap->zap_f.zap_phys->zap_ptrtbl.zt_nextblk) { 68866328dd3Sahrens int err; 689fa9e4066Sahrens 69066328dd3Sahrens /* 69166328dd3Sahrens * We are in the middle of growing the pointer table, or 69266328dd3Sahrens * this leaf will soon make us grow it. 69366328dd3Sahrens */ 694fa9e4066Sahrens if (zap_tryupgradedir(zap, tx) == 0) { 695fa9e4066Sahrens objset_t *os = zap->zap_objset; 696fa9e4066Sahrens uint64_t zapobj = zap->zap_object; 697fa9e4066Sahrens 698fa9e4066Sahrens zap_unlockdir(zap); 699fa9e4066Sahrens err = zap_lockdir(os, zapobj, tx, 700ad860c82Sbonwick RW_WRITER, FALSE, FALSE, &zn->zn_zap); 701ad860c82Sbonwick zap = zn->zn_zap; 70266328dd3Sahrens if (err) 70366328dd3Sahrens return; 704fa9e4066Sahrens } 705fa9e4066Sahrens 70666328dd3Sahrens /* could have finished growing while our locks were down */ 70766328dd3Sahrens if (zap->zap_f.zap_phys->zap_ptrtbl.zt_shift == shift) 70866328dd3Sahrens (void) zap_grow_ptrtbl(zap, tx); 709fa9e4066Sahrens } 710fa9e4066Sahrens } 711fa9e4066Sahrens 712fa9e4066Sahrens static int 71392241e0bSTom Erickson fzap_checkname(zap_name_t *zn) 714fa9e4066Sahrens { 715486ae710SMatthew Ahrens if (zn->zn_key_orig_numints * zn->zn_key_intlen > ZAP_MAXNAMELEN) 71692241e0bSTom Erickson return (ENAMETOOLONG); 71792241e0bSTom Erickson return (0); 71892241e0bSTom Erickson } 71966328dd3Sahrens 72092241e0bSTom Erickson static int 72192241e0bSTom Erickson fzap_checksize(uint64_t integer_size, uint64_t num_integers) 72292241e0bSTom Erickson { 723fa9e4066Sahrens /* Only integer sizes supported by C */ 724fa9e4066Sahrens switch (integer_size) { 725fa9e4066Sahrens case 1: 726fa9e4066Sahrens case 2: 727fa9e4066Sahrens case 4: 728fa9e4066Sahrens case 8: 729fa9e4066Sahrens break; 730fa9e4066Sahrens default: 731fa9e4066Sahrens return (EINVAL); 732fa9e4066Sahrens } 733fa9e4066Sahrens 73466328dd3Sahrens if (integer_size * num_integers > ZAP_MAXVALUELEN) 73566328dd3Sahrens return (E2BIG); 736fa9e4066Sahrens 737fa9e4066Sahrens return (0); 738fa9e4066Sahrens } 739fa9e4066Sahrens 74092241e0bSTom Erickson static int 74192241e0bSTom Erickson fzap_check(zap_name_t *zn, uint64_t integer_size, uint64_t num_integers) 74292241e0bSTom Erickson { 74392241e0bSTom Erickson int err; 74492241e0bSTom Erickson 74592241e0bSTom Erickson if ((err = fzap_checkname(zn)) != 0) 74692241e0bSTom Erickson return (err); 74792241e0bSTom Erickson return (fzap_checksize(integer_size, num_integers)); 74892241e0bSTom Erickson } 74992241e0bSTom Erickson 750fa9e4066Sahrens /* 751da6c28aaSamw * Routines for manipulating attributes. 752fa9e4066Sahrens */ 753fa9e4066Sahrens int 754da6c28aaSamw fzap_lookup(zap_name_t *zn, 755da6c28aaSamw uint64_t integer_size, uint64_t num_integers, void *buf, 756da6c28aaSamw char *realname, int rn_len, boolean_t *ncp) 757fa9e4066Sahrens { 758fa9e4066Sahrens zap_leaf_t *l; 759fa9e4066Sahrens int err; 760fa9e4066Sahrens zap_entry_handle_t zeh; 761fa9e4066Sahrens 76292241e0bSTom Erickson if ((err = fzap_checkname(zn)) != 0) 763fa9e4066Sahrens return (err); 764fa9e4066Sahrens 765da6c28aaSamw err = zap_deref_leaf(zn->zn_zap, zn->zn_hash, NULL, RW_READER, &l); 766ea8dc4b6Seschrock if (err != 0) 767ea8dc4b6Seschrock return (err); 768da6c28aaSamw err = zap_leaf_lookup(l, zn, &zeh); 769da6c28aaSamw if (err == 0) { 77092241e0bSTom Erickson if ((err = fzap_checksize(integer_size, num_integers)) != 0) { 77192241e0bSTom Erickson zap_put_leaf(l); 77292241e0bSTom Erickson return (err); 77392241e0bSTom Erickson } 77492241e0bSTom Erickson 77566328dd3Sahrens err = zap_entry_read(&zeh, integer_size, num_integers, buf); 776b24ab676SJeff Bonwick (void) zap_entry_read_name(zn->zn_zap, &zeh, rn_len, realname); 777da6c28aaSamw if (ncp) { 778da6c28aaSamw *ncp = zap_entry_normalization_conflict(&zeh, 779da6c28aaSamw zn, NULL, zn->zn_zap); 780da6c28aaSamw } 781da6c28aaSamw } 78266328dd3Sahrens 783fa9e4066Sahrens zap_put_leaf(l); 784fa9e4066Sahrens return (err); 785fa9e4066Sahrens } 786fa9e4066Sahrens 787fa9e4066Sahrens int 788da6c28aaSamw fzap_add_cd(zap_name_t *zn, 789fa9e4066Sahrens uint64_t integer_size, uint64_t num_integers, 790ea8dc4b6Seschrock const void *val, uint32_t cd, dmu_tx_t *tx) 791fa9e4066Sahrens { 792fa9e4066Sahrens zap_leaf_t *l; 793fa9e4066Sahrens int err; 794fa9e4066Sahrens zap_entry_handle_t zeh; 795da6c28aaSamw zap_t *zap = zn->zn_zap; 796fa9e4066Sahrens 797fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 798fa9e4066Sahrens ASSERT(!zap->zap_ismicro); 79992241e0bSTom Erickson ASSERT(fzap_check(zn, integer_size, num_integers) == 0); 800fa9e4066Sahrens 801da6c28aaSamw err = zap_deref_leaf(zap, zn->zn_hash, tx, RW_WRITER, &l); 802ea8dc4b6Seschrock if (err != 0) 803ea8dc4b6Seschrock return (err); 804fa9e4066Sahrens retry: 805da6c28aaSamw err = zap_leaf_lookup(l, zn, &zeh); 806fa9e4066Sahrens if (err == 0) { 807fa9e4066Sahrens err = EEXIST; 808fa9e4066Sahrens goto out; 809fa9e4066Sahrens } 810ea8dc4b6Seschrock if (err != ENOENT) 811ea8dc4b6Seschrock goto out; 812fa9e4066Sahrens 813b24ab676SJeff Bonwick err = zap_entry_create(l, zn, cd, 814fa9e4066Sahrens integer_size, num_integers, val, &zeh); 815fa9e4066Sahrens 816fa9e4066Sahrens if (err == 0) { 817fa9e4066Sahrens zap_increment_num_entries(zap, 1, tx); 818fa9e4066Sahrens } else if (err == EAGAIN) { 819ad860c82Sbonwick err = zap_expand_leaf(zn, l, tx, &l); 820ad860c82Sbonwick zap = zn->zn_zap; /* zap_expand_leaf() may change zap */ 82166328dd3Sahrens if (err == 0) 82266328dd3Sahrens goto retry; 823fa9e4066Sahrens } 824fa9e4066Sahrens 825fa9e4066Sahrens out: 826ad860c82Sbonwick if (zap != NULL) 827ad860c82Sbonwick zap_put_leaf_maybe_grow_ptrtbl(zn, l, tx); 828fa9e4066Sahrens return (err); 829fa9e4066Sahrens } 830fa9e4066Sahrens 831fa9e4066Sahrens int 832da6c28aaSamw fzap_add(zap_name_t *zn, 833fa9e4066Sahrens uint64_t integer_size, uint64_t num_integers, 834fa9e4066Sahrens const void *val, dmu_tx_t *tx) 835fa9e4066Sahrens { 83692241e0bSTom Erickson int err = fzap_check(zn, integer_size, num_integers); 837fa9e4066Sahrens if (err != 0) 838fa9e4066Sahrens return (err); 839fa9e4066Sahrens 840da6c28aaSamw return (fzap_add_cd(zn, integer_size, num_integers, 841b24ab676SJeff Bonwick val, ZAP_NEED_CD, tx)); 842fa9e4066Sahrens } 843fa9e4066Sahrens 844fa9e4066Sahrens int 845da6c28aaSamw fzap_update(zap_name_t *zn, 846fa9e4066Sahrens int integer_size, uint64_t num_integers, const void *val, dmu_tx_t *tx) 847fa9e4066Sahrens { 848fa9e4066Sahrens zap_leaf_t *l; 849fa9e4066Sahrens int err, create; 850fa9e4066Sahrens zap_entry_handle_t zeh; 851da6c28aaSamw zap_t *zap = zn->zn_zap; 852fa9e4066Sahrens 853fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 85492241e0bSTom Erickson err = fzap_check(zn, integer_size, num_integers); 855fa9e4066Sahrens if (err != 0) 856fa9e4066Sahrens return (err); 857fa9e4066Sahrens 858da6c28aaSamw err = zap_deref_leaf(zap, zn->zn_hash, tx, RW_WRITER, &l); 859ea8dc4b6Seschrock if (err != 0) 860ea8dc4b6Seschrock return (err); 861fa9e4066Sahrens retry: 862da6c28aaSamw err = zap_leaf_lookup(l, zn, &zeh); 863fa9e4066Sahrens create = (err == ENOENT); 864fa9e4066Sahrens ASSERT(err == 0 || err == ENOENT); 865fa9e4066Sahrens 866fa9e4066Sahrens if (create) { 867b24ab676SJeff Bonwick err = zap_entry_create(l, zn, ZAP_NEED_CD, 868b24ab676SJeff Bonwick integer_size, num_integers, val, &zeh); 869fa9e4066Sahrens if (err == 0) 870fa9e4066Sahrens zap_increment_num_entries(zap, 1, tx); 871fa9e4066Sahrens } else { 872fa9e4066Sahrens err = zap_entry_update(&zeh, integer_size, num_integers, val); 873fa9e4066Sahrens } 874fa9e4066Sahrens 875fa9e4066Sahrens if (err == EAGAIN) { 876ad860c82Sbonwick err = zap_expand_leaf(zn, l, tx, &l); 877ad860c82Sbonwick zap = zn->zn_zap; /* zap_expand_leaf() may change zap */ 87866328dd3Sahrens if (err == 0) 87966328dd3Sahrens goto retry; 880fa9e4066Sahrens } 881fa9e4066Sahrens 882ad860c82Sbonwick if (zap != NULL) 883ad860c82Sbonwick zap_put_leaf_maybe_grow_ptrtbl(zn, l, tx); 884fa9e4066Sahrens return (err); 885fa9e4066Sahrens } 886fa9e4066Sahrens 887fa9e4066Sahrens int 888da6c28aaSamw fzap_length(zap_name_t *zn, 889fa9e4066Sahrens uint64_t *integer_size, uint64_t *num_integers) 890fa9e4066Sahrens { 891fa9e4066Sahrens zap_leaf_t *l; 892fa9e4066Sahrens int err; 893fa9e4066Sahrens zap_entry_handle_t zeh; 894fa9e4066Sahrens 895da6c28aaSamw err = zap_deref_leaf(zn->zn_zap, zn->zn_hash, NULL, RW_READER, &l); 896ea8dc4b6Seschrock if (err != 0) 897ea8dc4b6Seschrock return (err); 898da6c28aaSamw err = zap_leaf_lookup(l, zn, &zeh); 899fa9e4066Sahrens if (err != 0) 900fa9e4066Sahrens goto out; 901fa9e4066Sahrens 902fa9e4066Sahrens if (integer_size) 903fa9e4066Sahrens *integer_size = zeh.zeh_integer_size; 904fa9e4066Sahrens if (num_integers) 905fa9e4066Sahrens *num_integers = zeh.zeh_num_integers; 906fa9e4066Sahrens out: 907fa9e4066Sahrens zap_put_leaf(l); 908fa9e4066Sahrens return (err); 909fa9e4066Sahrens } 910fa9e4066Sahrens 911fa9e4066Sahrens int 912da6c28aaSamw fzap_remove(zap_name_t *zn, dmu_tx_t *tx) 913fa9e4066Sahrens { 914fa9e4066Sahrens zap_leaf_t *l; 915fa9e4066Sahrens int err; 916fa9e4066Sahrens zap_entry_handle_t zeh; 917fa9e4066Sahrens 918da6c28aaSamw err = zap_deref_leaf(zn->zn_zap, zn->zn_hash, tx, RW_WRITER, &l); 919ea8dc4b6Seschrock if (err != 0) 920ea8dc4b6Seschrock return (err); 921da6c28aaSamw err = zap_leaf_lookup(l, zn, &zeh); 922fa9e4066Sahrens if (err == 0) { 923fa9e4066Sahrens zap_entry_remove(&zeh); 924da6c28aaSamw zap_increment_num_entries(zn->zn_zap, -1, tx); 925fa9e4066Sahrens } 926fa9e4066Sahrens zap_put_leaf(l); 927fa9e4066Sahrens return (err); 928fa9e4066Sahrens } 929fa9e4066Sahrens 930088f3894Sahrens /* 931088f3894Sahrens * Helper functions for consumers. 932088f3894Sahrens */ 933088f3894Sahrens 934fa9e4066Sahrens int 935e7437265Sahrens zap_value_search(objset_t *os, uint64_t zapobj, uint64_t value, uint64_t mask, 936e7437265Sahrens char *name) 937fa9e4066Sahrens { 938fa9e4066Sahrens zap_cursor_t zc; 939fa9e4066Sahrens zap_attribute_t *za; 940fa9e4066Sahrens int err; 941fa9e4066Sahrens 942e7437265Sahrens if (mask == 0) 943e7437265Sahrens mask = -1ULL; 944e7437265Sahrens 945fa9e4066Sahrens za = kmem_alloc(sizeof (zap_attribute_t), KM_SLEEP); 946fa9e4066Sahrens for (zap_cursor_init(&zc, os, zapobj); 947fa9e4066Sahrens (err = zap_cursor_retrieve(&zc, za)) == 0; 948fa9e4066Sahrens zap_cursor_advance(&zc)) { 949e7437265Sahrens if ((za->za_first_integer & mask) == (value & mask)) { 950fa9e4066Sahrens (void) strcpy(name, za->za_name); 951fa9e4066Sahrens break; 952fa9e4066Sahrens } 953fa9e4066Sahrens } 95487e5029aSahrens zap_cursor_fini(&zc); 955fa9e4066Sahrens kmem_free(za, sizeof (zap_attribute_t)); 956fa9e4066Sahrens return (err); 957fa9e4066Sahrens } 958fa9e4066Sahrens 959088f3894Sahrens int 960088f3894Sahrens zap_join(objset_t *os, uint64_t fromobj, uint64_t intoobj, dmu_tx_t *tx) 961088f3894Sahrens { 962088f3894Sahrens zap_cursor_t zc; 963088f3894Sahrens zap_attribute_t za; 964088f3894Sahrens int err; 965088f3894Sahrens 966088f3894Sahrens for (zap_cursor_init(&zc, os, fromobj); 967088f3894Sahrens zap_cursor_retrieve(&zc, &za) == 0; 968088f3894Sahrens (void) zap_cursor_advance(&zc)) { 969088f3894Sahrens if (za.za_integer_length != 8 || za.za_num_integers != 1) 970088f3894Sahrens return (EINVAL); 971088f3894Sahrens err = zap_add(os, intoobj, za.za_name, 972088f3894Sahrens 8, 1, &za.za_first_integer, tx); 973088f3894Sahrens if (err) 974088f3894Sahrens return (err); 975088f3894Sahrens } 976088f3894Sahrens zap_cursor_fini(&zc); 977088f3894Sahrens return (0); 978088f3894Sahrens } 979088f3894Sahrens 980088f3894Sahrens int 981088f3894Sahrens zap_add_int(objset_t *os, uint64_t obj, uint64_t value, dmu_tx_t *tx) 982088f3894Sahrens { 983088f3894Sahrens char name[20]; 984088f3894Sahrens 985088f3894Sahrens (void) snprintf(name, sizeof (name), "%llx", (longlong_t)value); 986088f3894Sahrens return (zap_add(os, obj, name, 8, 1, &value, tx)); 987088f3894Sahrens } 988088f3894Sahrens 989088f3894Sahrens int 990088f3894Sahrens zap_remove_int(objset_t *os, uint64_t obj, uint64_t value, dmu_tx_t *tx) 991088f3894Sahrens { 992088f3894Sahrens char name[20]; 993088f3894Sahrens 994088f3894Sahrens (void) snprintf(name, sizeof (name), "%llx", (longlong_t)value); 995088f3894Sahrens return (zap_remove(os, obj, name, tx)); 996088f3894Sahrens } 997088f3894Sahrens 998088f3894Sahrens int 999088f3894Sahrens zap_lookup_int(objset_t *os, uint64_t obj, uint64_t value) 1000088f3894Sahrens { 1001088f3894Sahrens char name[20]; 1002088f3894Sahrens 1003088f3894Sahrens (void) snprintf(name, sizeof (name), "%llx", (longlong_t)value); 1004088f3894Sahrens return (zap_lookup(os, obj, name, 8, 1, &value)); 1005088f3894Sahrens } 1006fa9e4066Sahrens 10079966ca11SMatthew Ahrens int 10089966ca11SMatthew Ahrens zap_increment_int(objset_t *os, uint64_t obj, uint64_t key, int64_t delta, 10099966ca11SMatthew Ahrens dmu_tx_t *tx) 10109966ca11SMatthew Ahrens { 10119966ca11SMatthew Ahrens char name[20]; 10129966ca11SMatthew Ahrens uint64_t value = 0; 10139966ca11SMatthew Ahrens int err; 10149966ca11SMatthew Ahrens 10159966ca11SMatthew Ahrens if (delta == 0) 10169966ca11SMatthew Ahrens return (0); 10179966ca11SMatthew Ahrens 10189966ca11SMatthew Ahrens (void) snprintf(name, sizeof (name), "%llx", (longlong_t)key); 10199966ca11SMatthew Ahrens err = zap_lookup(os, obj, name, 8, 1, &value); 10209966ca11SMatthew Ahrens if (err != 0 && err != ENOENT) 10219966ca11SMatthew Ahrens return (err); 10229966ca11SMatthew Ahrens value += delta; 10239966ca11SMatthew Ahrens if (value == 0) 10249966ca11SMatthew Ahrens err = zap_remove(os, obj, name, tx); 10259966ca11SMatthew Ahrens else 10269966ca11SMatthew Ahrens err = zap_update(os, obj, name, 8, 1, &value, tx); 10279966ca11SMatthew Ahrens return (err); 10289966ca11SMatthew Ahrens } 10299966ca11SMatthew Ahrens 10309966ca11SMatthew Ahrens 1031fa9e4066Sahrens /* 1032fa9e4066Sahrens * Routines for iterating over the attributes. 1033fa9e4066Sahrens */ 1034fa9e4066Sahrens 1035fa9e4066Sahrens int 1036fa9e4066Sahrens fzap_cursor_retrieve(zap_t *zap, zap_cursor_t *zc, zap_attribute_t *za) 1037fa9e4066Sahrens { 1038fa9e4066Sahrens int err = ENOENT; 1039fa9e4066Sahrens zap_entry_handle_t zeh; 1040fa9e4066Sahrens zap_leaf_t *l; 1041fa9e4066Sahrens 1042fa9e4066Sahrens /* retrieve the next entry at or after zc_hash/zc_cd */ 1043fa9e4066Sahrens /* if no entry, return ENOENT */ 1044fa9e4066Sahrens 104587e5029aSahrens if (zc->zc_leaf && 104666328dd3Sahrens (ZAP_HASH_IDX(zc->zc_hash, 104766328dd3Sahrens zc->zc_leaf->l_phys->l_hdr.lh_prefix_len) != 104866328dd3Sahrens zc->zc_leaf->l_phys->l_hdr.lh_prefix)) { 104987e5029aSahrens rw_enter(&zc->zc_leaf->l_rwlock, RW_READER); 105087e5029aSahrens zap_put_leaf(zc->zc_leaf); 105187e5029aSahrens zc->zc_leaf = NULL; 105287e5029aSahrens } 105387e5029aSahrens 1054fa9e4066Sahrens again: 105587e5029aSahrens if (zc->zc_leaf == NULL) { 1056ea8dc4b6Seschrock err = zap_deref_leaf(zap, zc->zc_hash, NULL, RW_READER, 1057ea8dc4b6Seschrock &zc->zc_leaf); 1058ea8dc4b6Seschrock if (err != 0) 1059ea8dc4b6Seschrock return (err); 106087e5029aSahrens } else { 106187e5029aSahrens rw_enter(&zc->zc_leaf->l_rwlock, RW_READER); 106287e5029aSahrens } 106387e5029aSahrens l = zc->zc_leaf; 106487e5029aSahrens 1065fa9e4066Sahrens err = zap_leaf_lookup_closest(l, zc->zc_hash, zc->zc_cd, &zeh); 1066fa9e4066Sahrens 1067fa9e4066Sahrens if (err == ENOENT) { 106866328dd3Sahrens uint64_t nocare = 106966328dd3Sahrens (1ULL << (64 - l->l_phys->l_hdr.lh_prefix_len)) - 1; 1070fa9e4066Sahrens zc->zc_hash = (zc->zc_hash & ~nocare) + nocare + 1; 1071fa9e4066Sahrens zc->zc_cd = 0; 107266328dd3Sahrens if (l->l_phys->l_hdr.lh_prefix_len == 0 || zc->zc_hash == 0) { 1073fa9e4066Sahrens zc->zc_hash = -1ULL; 1074fa9e4066Sahrens } else { 107587e5029aSahrens zap_put_leaf(zc->zc_leaf); 107687e5029aSahrens zc->zc_leaf = NULL; 1077fa9e4066Sahrens goto again; 1078fa9e4066Sahrens } 1079fa9e4066Sahrens } 1080fa9e4066Sahrens 1081fa9e4066Sahrens if (err == 0) { 1082fa9e4066Sahrens zc->zc_hash = zeh.zeh_hash; 1083fa9e4066Sahrens zc->zc_cd = zeh.zeh_cd; 1084fa9e4066Sahrens za->za_integer_length = zeh.zeh_integer_size; 1085fa9e4066Sahrens za->za_num_integers = zeh.zeh_num_integers; 1086fa9e4066Sahrens if (zeh.zeh_num_integers == 0) { 1087fa9e4066Sahrens za->za_first_integer = 0; 1088fa9e4066Sahrens } else { 1089fa9e4066Sahrens err = zap_entry_read(&zeh, 8, 1, &za->za_first_integer); 1090fa9e4066Sahrens ASSERT(err == 0 || err == EOVERFLOW); 1091fa9e4066Sahrens } 1092b24ab676SJeff Bonwick err = zap_entry_read_name(zap, &zeh, 1093fa9e4066Sahrens sizeof (za->za_name), za->za_name); 1094fa9e4066Sahrens ASSERT(err == 0); 1095da6c28aaSamw 1096da6c28aaSamw za->za_normalization_conflict = 1097da6c28aaSamw zap_entry_normalization_conflict(&zeh, 1098da6c28aaSamw NULL, za->za_name, zap); 1099fa9e4066Sahrens } 110087e5029aSahrens rw_exit(&zc->zc_leaf->l_rwlock); 1101fa9e4066Sahrens return (err); 1102fa9e4066Sahrens } 1103fa9e4066Sahrens 1104fa9e4066Sahrens 1105fa9e4066Sahrens static void 1106fa9e4066Sahrens zap_stats_ptrtbl(zap_t *zap, uint64_t *tbl, int len, zap_stats_t *zs) 1107fa9e4066Sahrens { 1108ea8dc4b6Seschrock int i, err; 1109fa9e4066Sahrens uint64_t lastblk = 0; 1110fa9e4066Sahrens 1111fa9e4066Sahrens /* 1112fa9e4066Sahrens * NB: if a leaf has more pointers than an entire ptrtbl block 1113fa9e4066Sahrens * can hold, then it'll be accounted for more than once, since 1114fa9e4066Sahrens * we won't have lastblk. 1115fa9e4066Sahrens */ 1116fa9e4066Sahrens for (i = 0; i < len; i++) { 1117fa9e4066Sahrens zap_leaf_t *l; 1118fa9e4066Sahrens 1119fa9e4066Sahrens if (tbl[i] == lastblk) 1120fa9e4066Sahrens continue; 1121fa9e4066Sahrens lastblk = tbl[i]; 1122fa9e4066Sahrens 1123ea8dc4b6Seschrock err = zap_get_leaf_byblk(zap, tbl[i], NULL, RW_READER, &l); 1124ea8dc4b6Seschrock if (err == 0) { 112566328dd3Sahrens zap_leaf_stats(zap, l, zs); 1126ea8dc4b6Seschrock zap_put_leaf(l); 1127ea8dc4b6Seschrock } 1128fa9e4066Sahrens } 1129fa9e4066Sahrens } 1130fa9e4066Sahrens 1131d20e665cSRicardo M. Correia int 1132d20e665cSRicardo M. Correia fzap_cursor_move_to_key(zap_cursor_t *zc, zap_name_t *zn) 1133d20e665cSRicardo M. Correia { 1134d20e665cSRicardo M. Correia int err; 1135d20e665cSRicardo M. Correia zap_leaf_t *l; 1136d20e665cSRicardo M. Correia zap_entry_handle_t zeh; 1137d20e665cSRicardo M. Correia 1138486ae710SMatthew Ahrens if (zn->zn_key_orig_numints * zn->zn_key_intlen > ZAP_MAXNAMELEN) 113992241e0bSTom Erickson return (ENAMETOOLONG); 1140d20e665cSRicardo M. Correia 1141d20e665cSRicardo M. Correia err = zap_deref_leaf(zc->zc_zap, zn->zn_hash, NULL, RW_READER, &l); 1142d20e665cSRicardo M. Correia if (err != 0) 1143d20e665cSRicardo M. Correia return (err); 1144d20e665cSRicardo M. Correia 1145d20e665cSRicardo M. Correia err = zap_leaf_lookup(l, zn, &zeh); 1146d20e665cSRicardo M. Correia if (err != 0) 1147d20e665cSRicardo M. Correia return (err); 1148d20e665cSRicardo M. Correia 1149d20e665cSRicardo M. Correia zc->zc_leaf = l; 1150d20e665cSRicardo M. Correia zc->zc_hash = zeh.zeh_hash; 1151d20e665cSRicardo M. Correia zc->zc_cd = zeh.zeh_cd; 1152d20e665cSRicardo M. Correia 1153d20e665cSRicardo M. Correia return (err); 1154d20e665cSRicardo M. Correia } 1155d20e665cSRicardo M. Correia 1156fa9e4066Sahrens void 1157fa9e4066Sahrens fzap_get_stats(zap_t *zap, zap_stats_t *zs) 1158fa9e4066Sahrens { 1159f65e61c0Sahrens int bs = FZAP_BLOCK_SHIFT(zap); 1160f65e61c0Sahrens zs->zs_blocksize = 1ULL << bs; 11618248818dSnd 11628248818dSnd /* 11638248818dSnd * Set zap_phys_t fields 11648248818dSnd */ 1165fa9e4066Sahrens zs->zs_num_leafs = zap->zap_f.zap_phys->zap_num_leafs; 1166fa9e4066Sahrens zs->zs_num_entries = zap->zap_f.zap_phys->zap_num_entries; 1167fa9e4066Sahrens zs->zs_num_blocks = zap->zap_f.zap_phys->zap_freeblk; 11688248818dSnd zs->zs_block_type = zap->zap_f.zap_phys->zap_block_type; 11698248818dSnd zs->zs_magic = zap->zap_f.zap_phys->zap_magic; 11708248818dSnd zs->zs_salt = zap->zap_f.zap_phys->zap_salt; 11718248818dSnd 11728248818dSnd /* 11738248818dSnd * Set zap_ptrtbl fields 11748248818dSnd */ 11758248818dSnd zs->zs_ptrtbl_len = 1ULL << zap->zap_f.zap_phys->zap_ptrtbl.zt_shift; 11768248818dSnd zs->zs_ptrtbl_nextblk = zap->zap_f.zap_phys->zap_ptrtbl.zt_nextblk; 11778248818dSnd zs->zs_ptrtbl_blks_copied = 11788248818dSnd zap->zap_f.zap_phys->zap_ptrtbl.zt_blks_copied; 11798248818dSnd zs->zs_ptrtbl_zt_blk = zap->zap_f.zap_phys->zap_ptrtbl.zt_blk; 11808248818dSnd zs->zs_ptrtbl_zt_numblks = zap->zap_f.zap_phys->zap_ptrtbl.zt_numblks; 11818248818dSnd zs->zs_ptrtbl_zt_shift = zap->zap_f.zap_phys->zap_ptrtbl.zt_shift; 1182fa9e4066Sahrens 1183fa9e4066Sahrens if (zap->zap_f.zap_phys->zap_ptrtbl.zt_numblks == 0) { 1184fa9e4066Sahrens /* the ptrtbl is entirely in the header block. */ 1185f65e61c0Sahrens zap_stats_ptrtbl(zap, &ZAP_EMBEDDED_PTRTBL_ENT(zap, 0), 1186f65e61c0Sahrens 1 << ZAP_EMBEDDED_PTRTBL_SHIFT(zap), zs); 1187fa9e4066Sahrens } else { 1188fa9e4066Sahrens int b; 1189fa9e4066Sahrens 1190fa9e4066Sahrens dmu_prefetch(zap->zap_objset, zap->zap_object, 1191f65e61c0Sahrens zap->zap_f.zap_phys->zap_ptrtbl.zt_blk << bs, 1192f65e61c0Sahrens zap->zap_f.zap_phys->zap_ptrtbl.zt_numblks << bs); 1193fa9e4066Sahrens 1194fa9e4066Sahrens for (b = 0; b < zap->zap_f.zap_phys->zap_ptrtbl.zt_numblks; 1195fa9e4066Sahrens b++) { 1196fa9e4066Sahrens dmu_buf_t *db; 1197ea8dc4b6Seschrock int err; 1198ea8dc4b6Seschrock 1199ea8dc4b6Seschrock err = dmu_buf_hold(zap->zap_objset, zap->zap_object, 1200ea8dc4b6Seschrock (zap->zap_f.zap_phys->zap_ptrtbl.zt_blk + b) << bs, 1201*47cb52daSJeff Bonwick FTAG, &db, DMU_READ_NO_PREFETCH); 1202ea8dc4b6Seschrock if (err == 0) { 1203ea8dc4b6Seschrock zap_stats_ptrtbl(zap, db->db_data, 1204ea8dc4b6Seschrock 1<<(bs-3), zs); 1205ea8dc4b6Seschrock dmu_buf_rele(db, FTAG); 1206ea8dc4b6Seschrock } 1207fa9e4066Sahrens } 1208fa9e4066Sahrens } 1209fa9e4066Sahrens } 12103d692628SSanjeev Bagewadi 12113d692628SSanjeev Bagewadi int 12123d692628SSanjeev Bagewadi fzap_count_write(zap_name_t *zn, int add, uint64_t *towrite, 12133d692628SSanjeev Bagewadi uint64_t *tooverwrite) 12143d692628SSanjeev Bagewadi { 12153d692628SSanjeev Bagewadi zap_t *zap = zn->zn_zap; 12163d692628SSanjeev Bagewadi zap_leaf_t *l; 12173d692628SSanjeev Bagewadi int err; 12183d692628SSanjeev Bagewadi 12193d692628SSanjeev Bagewadi /* 12203d692628SSanjeev Bagewadi * Account for the header block of the fatzap. 12213d692628SSanjeev Bagewadi */ 12223d692628SSanjeev Bagewadi if (!add && dmu_buf_freeable(zap->zap_dbuf)) { 122312a2833aSSanjeev Bagewadi *tooverwrite += zap->zap_dbuf->db_size; 12243d692628SSanjeev Bagewadi } else { 122512a2833aSSanjeev Bagewadi *towrite += zap->zap_dbuf->db_size; 12263d692628SSanjeev Bagewadi } 12273d692628SSanjeev Bagewadi 12283d692628SSanjeev Bagewadi /* 12293d692628SSanjeev Bagewadi * Account for the pointer table blocks. 12303d692628SSanjeev Bagewadi * If we are adding we need to account for the following cases : 12313d692628SSanjeev Bagewadi * - If the pointer table is embedded, this operation could force an 12323d692628SSanjeev Bagewadi * external pointer table. 12333d692628SSanjeev Bagewadi * - If this already has an external pointer table this operation 12343d692628SSanjeev Bagewadi * could extend the table. 12353d692628SSanjeev Bagewadi */ 12363d692628SSanjeev Bagewadi if (add) { 12373d692628SSanjeev Bagewadi if (zap->zap_f.zap_phys->zap_ptrtbl.zt_blk == 0) 123812a2833aSSanjeev Bagewadi *towrite += zap->zap_dbuf->db_size; 12393d692628SSanjeev Bagewadi else 124012a2833aSSanjeev Bagewadi *towrite += (zap->zap_dbuf->db_size * 3); 12413d692628SSanjeev Bagewadi } 12423d692628SSanjeev Bagewadi 12433d692628SSanjeev Bagewadi /* 12443d692628SSanjeev Bagewadi * Now, check if the block containing leaf is freeable 12453d692628SSanjeev Bagewadi * and account accordingly. 12463d692628SSanjeev Bagewadi */ 12473d692628SSanjeev Bagewadi err = zap_deref_leaf(zap, zn->zn_hash, NULL, RW_READER, &l); 12483d692628SSanjeev Bagewadi if (err != 0) { 12493d692628SSanjeev Bagewadi return (err); 12503d692628SSanjeev Bagewadi } 12513d692628SSanjeev Bagewadi 12523d692628SSanjeev Bagewadi if (!add && dmu_buf_freeable(l->l_dbuf)) { 125312a2833aSSanjeev Bagewadi *tooverwrite += l->l_dbuf->db_size; 12543d692628SSanjeev Bagewadi } else { 12553d692628SSanjeev Bagewadi /* 12563d692628SSanjeev Bagewadi * If this an add operation, the leaf block could split. 12573d692628SSanjeev Bagewadi * Hence, we need to account for an additional leaf block. 12583d692628SSanjeev Bagewadi */ 125912a2833aSSanjeev Bagewadi *towrite += (add ? 2 : 1) * l->l_dbuf->db_size; 12603d692628SSanjeev Bagewadi } 12613d692628SSanjeev Bagewadi 12623d692628SSanjeev Bagewadi zap_put_leaf(l); 12633d692628SSanjeev Bagewadi return (0); 12643d692628SSanjeev Bagewadi } 1265