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 /* 22e7437265Sahrens * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 23fa9e4066Sahrens * Use is subject to license terms. 24fa9e4066Sahrens */ 25fa9e4066Sahrens 26fa9e4066Sahrens #pragma ident "%Z%%M% %I% %E% SMI" 27fa9e4066Sahrens 28fa9e4066Sahrens 29fa9e4066Sahrens /* 30fa9e4066Sahrens * This file contains the top half of the zfs directory structure 31fa9e4066Sahrens * implementation. The bottom half is in zap_leaf.c. 32fa9e4066Sahrens * 33fa9e4066Sahrens * The zdir is an extendable hash data structure. There is a table of 34fa9e4066Sahrens * pointers to buckets (zap_t->zd_data->zd_leafs). The buckets are 35fa9e4066Sahrens * each a constant size and hold a variable number of directory entries. 36fa9e4066Sahrens * The buckets (aka "leaf nodes") are implemented in zap_leaf.c. 37fa9e4066Sahrens * 38fa9e4066Sahrens * The pointer table holds a power of 2 number of pointers. 39fa9e4066Sahrens * (1<<zap_t->zd_data->zd_phys->zd_prefix_len). The bucket pointed to 40fa9e4066Sahrens * by the pointer at index i in the table holds entries whose hash value 41fa9e4066Sahrens * has a zd_prefix_len - bit prefix 42fa9e4066Sahrens */ 43fa9e4066Sahrens 44fa9e4066Sahrens #include <sys/spa.h> 45fa9e4066Sahrens #include <sys/dmu.h> 46fa9e4066Sahrens #include <sys/zfs_context.h> 47*de8267e0Stimh #include <sys/zfs_znode.h> 48fa9e4066Sahrens #include <sys/zap.h> 49ea8dc4b6Seschrock #include <sys/refcount.h> 50fa9e4066Sahrens #include <sys/zap_impl.h> 51fa9e4066Sahrens #include <sys/zap_leaf.h> 52fa9e4066Sahrens 53f65e61c0Sahrens int fzap_default_block_shift = 14; /* 16k blocksize */ 54fa9e4066Sahrens 55fa9e4066Sahrens static void zap_leaf_pageout(dmu_buf_t *db, void *vl); 5666328dd3Sahrens static uint64_t zap_allocate_blocks(zap_t *zap, int nblocks); 57fa9e4066Sahrens 58fa9e4066Sahrens 59fa9e4066Sahrens void 60fa9e4066Sahrens fzap_byteswap(void *vbuf, size_t size) 61fa9e4066Sahrens { 62fa9e4066Sahrens uint64_t block_type; 63fa9e4066Sahrens 64fa9e4066Sahrens block_type = *(uint64_t *)vbuf; 65fa9e4066Sahrens 665ad82045Snd if (block_type == ZBT_LEAF || block_type == BSWAP_64(ZBT_LEAF)) 67f65e61c0Sahrens zap_leaf_byteswap(vbuf, size); 685ad82045Snd else { 69fa9e4066Sahrens /* it's a ptrtbl block */ 70f65e61c0Sahrens byteswap_uint64_array(vbuf, size); 71fa9e4066Sahrens } 72fa9e4066Sahrens } 73fa9e4066Sahrens 74fa9e4066Sahrens void 75fa9e4066Sahrens fzap_upgrade(zap_t *zap, dmu_tx_t *tx) 76fa9e4066Sahrens { 77fa9e4066Sahrens dmu_buf_t *db; 78fa9e4066Sahrens zap_leaf_t *l; 79fa9e4066Sahrens int i; 80fa9e4066Sahrens zap_phys_t *zp; 81fa9e4066Sahrens 82fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 83fa9e4066Sahrens zap->zap_ismicro = FALSE; 84fa9e4066Sahrens 85fa9e4066Sahrens (void) dmu_buf_update_user(zap->zap_dbuf, zap, zap, 86455d5089Sahrens &zap->zap_f.zap_phys, zap_evict); 87fa9e4066Sahrens 88fa9e4066Sahrens mutex_init(&zap->zap_f.zap_num_entries_mtx, 0, 0, 0); 89f65e61c0Sahrens zap->zap_f.zap_block_shift = highbit(zap->zap_dbuf->db_size) - 1; 90fa9e4066Sahrens 91fa9e4066Sahrens zp = zap->zap_f.zap_phys; 92fa9e4066Sahrens /* 93fa9e4066Sahrens * explicitly zero it since it might be coming from an 94fa9e4066Sahrens * initialized microzap 95fa9e4066Sahrens */ 96f65e61c0Sahrens bzero(zap->zap_dbuf->db_data, zap->zap_dbuf->db_size); 97fa9e4066Sahrens zp->zap_block_type = ZBT_HEADER; 98fa9e4066Sahrens zp->zap_magic = ZAP_MAGIC; 99fa9e4066Sahrens 100f65e61c0Sahrens zp->zap_ptrtbl.zt_shift = ZAP_EMBEDDED_PTRTBL_SHIFT(zap); 101fa9e4066Sahrens 102fa9e4066Sahrens zp->zap_freeblk = 2; /* block 1 will be the first leaf */ 103fa9e4066Sahrens zp->zap_num_leafs = 1; 104fa9e4066Sahrens zp->zap_num_entries = 0; 105fa9e4066Sahrens zp->zap_salt = zap->zap_salt; 106da6c28aaSamw zp->zap_normflags = zap->zap_normflags; 107fa9e4066Sahrens 108f65e61c0Sahrens /* block 1 will be the first leaf */ 109f65e61c0Sahrens for (i = 0; i < (1<<zp->zap_ptrtbl.zt_shift); i++) 110f65e61c0Sahrens ZAP_EMBEDDED_PTRTBL_ENT(zap, i) = 1; 111fa9e4066Sahrens 112fa9e4066Sahrens /* 113fa9e4066Sahrens * set up block 1 - the first leaf 114fa9e4066Sahrens */ 115ea8dc4b6Seschrock VERIFY(0 == dmu_buf_hold(zap->zap_objset, zap->zap_object, 116ea8dc4b6Seschrock 1<<FZAP_BLOCK_SHIFT(zap), FTAG, &db)); 117fa9e4066Sahrens dmu_buf_will_dirty(db, tx); 118fa9e4066Sahrens 119fa9e4066Sahrens l = kmem_zalloc(sizeof (zap_leaf_t), KM_SLEEP); 120fa9e4066Sahrens l->l_dbuf = db; 121fa9e4066Sahrens l->l_phys = db->db_data; 122fa9e4066Sahrens 123*de8267e0Stimh zap_leaf_init(l, zp->zap_normflags != 0); 124fa9e4066Sahrens 125fa9e4066Sahrens kmem_free(l, sizeof (zap_leaf_t)); 126ea8dc4b6Seschrock dmu_buf_rele(db, FTAG); 127fa9e4066Sahrens } 128fa9e4066Sahrens 129fa9e4066Sahrens static int 130fa9e4066Sahrens zap_tryupgradedir(zap_t *zap, dmu_tx_t *tx) 131fa9e4066Sahrens { 132fa9e4066Sahrens if (RW_WRITE_HELD(&zap->zap_rwlock)) 133fa9e4066Sahrens return (1); 134fa9e4066Sahrens if (rw_tryupgrade(&zap->zap_rwlock)) { 135fa9e4066Sahrens dmu_buf_will_dirty(zap->zap_dbuf, tx); 136fa9e4066Sahrens return (1); 137fa9e4066Sahrens } 138fa9e4066Sahrens return (0); 139fa9e4066Sahrens } 140fa9e4066Sahrens 141fa9e4066Sahrens /* 142fa9e4066Sahrens * Generic routines for dealing with the pointer & cookie tables. 143fa9e4066Sahrens */ 144fa9e4066Sahrens 14566328dd3Sahrens static int 146fa9e4066Sahrens zap_table_grow(zap_t *zap, zap_table_phys_t *tbl, 147fa9e4066Sahrens void (*transfer_func)(const uint64_t *src, uint64_t *dst, int n), 148fa9e4066Sahrens dmu_tx_t *tx) 149fa9e4066Sahrens { 150fa9e4066Sahrens uint64_t b, newblk; 151fa9e4066Sahrens dmu_buf_t *db_old, *db_new; 152ea8dc4b6Seschrock int err; 153f65e61c0Sahrens int bs = FZAP_BLOCK_SHIFT(zap); 154f65e61c0Sahrens int hepb = 1<<(bs-4); 155fa9e4066Sahrens /* hepb = half the number of entries in a block */ 156fa9e4066Sahrens 157fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 158fa9e4066Sahrens ASSERT(tbl->zt_blk != 0); 159fa9e4066Sahrens ASSERT(tbl->zt_numblks > 0); 160fa9e4066Sahrens 161fa9e4066Sahrens if (tbl->zt_nextblk != 0) { 162fa9e4066Sahrens newblk = tbl->zt_nextblk; 163fa9e4066Sahrens } else { 16466328dd3Sahrens newblk = zap_allocate_blocks(zap, tbl->zt_numblks * 2); 165fa9e4066Sahrens tbl->zt_nextblk = newblk; 166fa9e4066Sahrens ASSERT3U(tbl->zt_blks_copied, ==, 0); 167fa9e4066Sahrens dmu_prefetch(zap->zap_objset, zap->zap_object, 168f65e61c0Sahrens tbl->zt_blk << bs, tbl->zt_numblks << bs); 169fa9e4066Sahrens } 170fa9e4066Sahrens 171fa9e4066Sahrens /* 17266328dd3Sahrens * Copy the ptrtbl from the old to new location. 173fa9e4066Sahrens */ 174fa9e4066Sahrens 175fa9e4066Sahrens b = tbl->zt_blks_copied; 176ea8dc4b6Seschrock err = dmu_buf_hold(zap->zap_objset, zap->zap_object, 177ea8dc4b6Seschrock (tbl->zt_blk + b) << bs, FTAG, &db_old); 178ea8dc4b6Seschrock if (err) 17966328dd3Sahrens return (err); 180fa9e4066Sahrens 181fa9e4066Sahrens /* first half of entries in old[b] go to new[2*b+0] */ 182ea8dc4b6Seschrock VERIFY(0 == dmu_buf_hold(zap->zap_objset, zap->zap_object, 183ea8dc4b6Seschrock (newblk + 2*b+0) << bs, FTAG, &db_new)); 184fa9e4066Sahrens dmu_buf_will_dirty(db_new, tx); 185fa9e4066Sahrens transfer_func(db_old->db_data, db_new->db_data, hepb); 186ea8dc4b6Seschrock dmu_buf_rele(db_new, FTAG); 187fa9e4066Sahrens 188fa9e4066Sahrens /* second half of entries in old[b] go to new[2*b+1] */ 189ea8dc4b6Seschrock VERIFY(0 == dmu_buf_hold(zap->zap_objset, zap->zap_object, 190ea8dc4b6Seschrock (newblk + 2*b+1) << bs, FTAG, &db_new)); 191fa9e4066Sahrens dmu_buf_will_dirty(db_new, tx); 192fa9e4066Sahrens transfer_func((uint64_t *)db_old->db_data + hepb, 193fa9e4066Sahrens db_new->db_data, hepb); 194ea8dc4b6Seschrock dmu_buf_rele(db_new, FTAG); 195fa9e4066Sahrens 196ea8dc4b6Seschrock dmu_buf_rele(db_old, FTAG); 197fa9e4066Sahrens 198fa9e4066Sahrens tbl->zt_blks_copied++; 199fa9e4066Sahrens 200fa9e4066Sahrens dprintf("copied block %llu of %llu\n", 201fa9e4066Sahrens tbl->zt_blks_copied, tbl->zt_numblks); 202fa9e4066Sahrens 203fa9e4066Sahrens if (tbl->zt_blks_copied == tbl->zt_numblks) { 204ea8dc4b6Seschrock (void) dmu_free_range(zap->zap_objset, zap->zap_object, 205f65e61c0Sahrens tbl->zt_blk << bs, tbl->zt_numblks << bs, tx); 206fa9e4066Sahrens 207fa9e4066Sahrens tbl->zt_blk = newblk; 208fa9e4066Sahrens tbl->zt_numblks *= 2; 209fa9e4066Sahrens tbl->zt_shift++; 210fa9e4066Sahrens tbl->zt_nextblk = 0; 211fa9e4066Sahrens tbl->zt_blks_copied = 0; 212fa9e4066Sahrens 213fa9e4066Sahrens dprintf("finished; numblocks now %llu (%lluk entries)\n", 214fa9e4066Sahrens tbl->zt_numblks, 1<<(tbl->zt_shift-10)); 215fa9e4066Sahrens } 21666328dd3Sahrens 21766328dd3Sahrens return (0); 218fa9e4066Sahrens } 219fa9e4066Sahrens 220ea8dc4b6Seschrock static int 221fa9e4066Sahrens zap_table_store(zap_t *zap, zap_table_phys_t *tbl, uint64_t idx, uint64_t val, 222fa9e4066Sahrens dmu_tx_t *tx) 223fa9e4066Sahrens { 224ea8dc4b6Seschrock int err; 225ea8dc4b6Seschrock uint64_t blk, off; 226f65e61c0Sahrens int bs = FZAP_BLOCK_SHIFT(zap); 227ea8dc4b6Seschrock dmu_buf_t *db; 228fa9e4066Sahrens 229fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 230fa9e4066Sahrens ASSERT(tbl->zt_blk != 0); 231fa9e4066Sahrens 232fa9e4066Sahrens dprintf("storing %llx at index %llx\n", val, idx); 233fa9e4066Sahrens 234f65e61c0Sahrens blk = idx >> (bs-3); 235f65e61c0Sahrens off = idx & ((1<<(bs-3))-1); 236fa9e4066Sahrens 237ea8dc4b6Seschrock err = dmu_buf_hold(zap->zap_objset, zap->zap_object, 238ea8dc4b6Seschrock (tbl->zt_blk + blk) << bs, FTAG, &db); 239ea8dc4b6Seschrock if (err) 240ea8dc4b6Seschrock return (err); 241fa9e4066Sahrens dmu_buf_will_dirty(db, tx); 242fa9e4066Sahrens 243fa9e4066Sahrens if (tbl->zt_nextblk != 0) { 244ea8dc4b6Seschrock uint64_t idx2 = idx * 2; 245ea8dc4b6Seschrock uint64_t blk2 = idx2 >> (bs-3); 246ea8dc4b6Seschrock uint64_t off2 = idx2 & ((1<<(bs-3))-1); 247ea8dc4b6Seschrock dmu_buf_t *db2; 248ea8dc4b6Seschrock 249ea8dc4b6Seschrock err = dmu_buf_hold(zap->zap_objset, zap->zap_object, 250ea8dc4b6Seschrock (tbl->zt_nextblk + blk2) << bs, FTAG, &db2); 251ea8dc4b6Seschrock if (err) { 252ea8dc4b6Seschrock dmu_buf_rele(db, FTAG); 253ea8dc4b6Seschrock return (err); 254ea8dc4b6Seschrock } 255ea8dc4b6Seschrock dmu_buf_will_dirty(db2, tx); 256ea8dc4b6Seschrock ((uint64_t *)db2->db_data)[off2] = val; 257ea8dc4b6Seschrock ((uint64_t *)db2->db_data)[off2+1] = val; 258ea8dc4b6Seschrock dmu_buf_rele(db2, FTAG); 259fa9e4066Sahrens } 260fa9e4066Sahrens 261ea8dc4b6Seschrock ((uint64_t *)db->db_data)[off] = val; 262ea8dc4b6Seschrock dmu_buf_rele(db, FTAG); 263ea8dc4b6Seschrock 264ea8dc4b6Seschrock return (0); 265fa9e4066Sahrens } 266fa9e4066Sahrens 267ea8dc4b6Seschrock static int 268ea8dc4b6Seschrock zap_table_load(zap_t *zap, zap_table_phys_t *tbl, uint64_t idx, uint64_t *valp) 269fa9e4066Sahrens { 270ea8dc4b6Seschrock uint64_t blk, off; 271ea8dc4b6Seschrock int err; 272fa9e4066Sahrens dmu_buf_t *db; 273f65e61c0Sahrens int bs = FZAP_BLOCK_SHIFT(zap); 274fa9e4066Sahrens 275fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 276fa9e4066Sahrens 277f65e61c0Sahrens blk = idx >> (bs-3); 278f65e61c0Sahrens off = idx & ((1<<(bs-3))-1); 279fa9e4066Sahrens 280ea8dc4b6Seschrock err = dmu_buf_hold(zap->zap_objset, zap->zap_object, 281ea8dc4b6Seschrock (tbl->zt_blk + blk) << bs, FTAG, &db); 282ea8dc4b6Seschrock if (err) 283ea8dc4b6Seschrock return (err); 284ea8dc4b6Seschrock *valp = ((uint64_t *)db->db_data)[off]; 285ea8dc4b6Seschrock dmu_buf_rele(db, FTAG); 286ea8dc4b6Seschrock 287ea8dc4b6Seschrock if (tbl->zt_nextblk != 0) { 288ea8dc4b6Seschrock /* 289ea8dc4b6Seschrock * read the nextblk for the sake of i/o error checking, 290ea8dc4b6Seschrock * so that zap_table_load() will catch errors for 291ea8dc4b6Seschrock * zap_table_store. 292ea8dc4b6Seschrock */ 293ea8dc4b6Seschrock blk = (idx*2) >> (bs-3); 294ea8dc4b6Seschrock 295ea8dc4b6Seschrock err = dmu_buf_hold(zap->zap_objset, zap->zap_object, 296ea8dc4b6Seschrock (tbl->zt_nextblk + blk) << bs, FTAG, &db); 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 { 32066328dd3Sahrens /* In case things go horribly wrong. */ 32166328dd3Sahrens if (zap->zap_f.zap_phys->zap_ptrtbl.zt_shift >= ZAP_HASHBITS-2) 32266328dd3Sahrens return (ENOSPC); 323fa9e4066Sahrens 324fa9e4066Sahrens if (zap->zap_f.zap_phys->zap_ptrtbl.zt_numblks == 0) { 325fa9e4066Sahrens /* 326f65e61c0Sahrens * We are outgrowing the "embedded" ptrtbl (the one 327f65e61c0Sahrens * stored in the header block). Give it its own entire 328f65e61c0Sahrens * block, which will double the size of the ptrtbl. 329fa9e4066Sahrens */ 330fa9e4066Sahrens uint64_t newblk; 331fa9e4066Sahrens dmu_buf_t *db_new; 332ea8dc4b6Seschrock int err; 333fa9e4066Sahrens 334fa9e4066Sahrens ASSERT3U(zap->zap_f.zap_phys->zap_ptrtbl.zt_shift, ==, 335f65e61c0Sahrens ZAP_EMBEDDED_PTRTBL_SHIFT(zap)); 336fa9e4066Sahrens ASSERT3U(zap->zap_f.zap_phys->zap_ptrtbl.zt_blk, ==, 0); 337fa9e4066Sahrens 33866328dd3Sahrens newblk = zap_allocate_blocks(zap, 1); 339ea8dc4b6Seschrock err = dmu_buf_hold(zap->zap_objset, zap->zap_object, 340ea8dc4b6Seschrock newblk << FZAP_BLOCK_SHIFT(zap), FTAG, &db_new); 341ea8dc4b6Seschrock if (err) 34266328dd3Sahrens return (err); 343fa9e4066Sahrens dmu_buf_will_dirty(db_new, tx); 344f65e61c0Sahrens zap_ptrtbl_transfer(&ZAP_EMBEDDED_PTRTBL_ENT(zap, 0), 345f65e61c0Sahrens db_new->db_data, 1 << ZAP_EMBEDDED_PTRTBL_SHIFT(zap)); 346ea8dc4b6Seschrock dmu_buf_rele(db_new, FTAG); 347fa9e4066Sahrens 348fa9e4066Sahrens zap->zap_f.zap_phys->zap_ptrtbl.zt_blk = newblk; 349fa9e4066Sahrens zap->zap_f.zap_phys->zap_ptrtbl.zt_numblks = 1; 350fa9e4066Sahrens zap->zap_f.zap_phys->zap_ptrtbl.zt_shift++; 351fa9e4066Sahrens 352fa9e4066Sahrens ASSERT3U(1ULL << zap->zap_f.zap_phys->zap_ptrtbl.zt_shift, ==, 353fa9e4066Sahrens zap->zap_f.zap_phys->zap_ptrtbl.zt_numblks << 354f65e61c0Sahrens (FZAP_BLOCK_SHIFT(zap)-3)); 35566328dd3Sahrens 35666328dd3Sahrens return (0); 357fa9e4066Sahrens } else { 35866328dd3Sahrens return (zap_table_grow(zap, &zap->zap_f.zap_phys->zap_ptrtbl, 35966328dd3Sahrens zap_ptrtbl_transfer, tx)); 360fa9e4066Sahrens } 361fa9e4066Sahrens } 362fa9e4066Sahrens 363fa9e4066Sahrens static void 364fa9e4066Sahrens zap_increment_num_entries(zap_t *zap, int delta, dmu_tx_t *tx) 365fa9e4066Sahrens { 366fa9e4066Sahrens dmu_buf_will_dirty(zap->zap_dbuf, tx); 367fa9e4066Sahrens mutex_enter(&zap->zap_f.zap_num_entries_mtx); 368fa9e4066Sahrens ASSERT(delta > 0 || zap->zap_f.zap_phys->zap_num_entries >= -delta); 369fa9e4066Sahrens zap->zap_f.zap_phys->zap_num_entries += delta; 370fa9e4066Sahrens mutex_exit(&zap->zap_f.zap_num_entries_mtx); 371fa9e4066Sahrens } 372fa9e4066Sahrens 37366328dd3Sahrens static uint64_t 37466328dd3Sahrens zap_allocate_blocks(zap_t *zap, int nblocks) 375fa9e4066Sahrens { 376fa9e4066Sahrens uint64_t newblk; 37766328dd3Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 37866328dd3Sahrens newblk = zap->zap_f.zap_phys->zap_freeblk; 37966328dd3Sahrens zap->zap_f.zap_phys->zap_freeblk += nblocks; 380fa9e4066Sahrens return (newblk); 381fa9e4066Sahrens } 382fa9e4066Sahrens 38366328dd3Sahrens static zap_leaf_t * 384fa9e4066Sahrens zap_create_leaf(zap_t *zap, dmu_tx_t *tx) 385fa9e4066Sahrens { 386fa9e4066Sahrens void *winner; 387fa9e4066Sahrens zap_leaf_t *l = kmem_alloc(sizeof (zap_leaf_t), KM_SLEEP); 388fa9e4066Sahrens 389fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 390fa9e4066Sahrens 391fa9e4066Sahrens rw_init(&l->l_rwlock, 0, 0, 0); 392fa9e4066Sahrens rw_enter(&l->l_rwlock, RW_WRITER); 39366328dd3Sahrens l->l_blkid = zap_allocate_blocks(zap, 1); 394fa9e4066Sahrens l->l_dbuf = NULL; 395fa9e4066Sahrens l->l_phys = NULL; 396fa9e4066Sahrens 397ea8dc4b6Seschrock VERIFY(0 == dmu_buf_hold(zap->zap_objset, zap->zap_object, 398ea8dc4b6Seschrock l->l_blkid << FZAP_BLOCK_SHIFT(zap), NULL, &l->l_dbuf)); 399fa9e4066Sahrens winner = dmu_buf_set_user(l->l_dbuf, l, &l->l_phys, zap_leaf_pageout); 400fa9e4066Sahrens ASSERT(winner == NULL); 401fa9e4066Sahrens dmu_buf_will_dirty(l->l_dbuf, tx); 402fa9e4066Sahrens 403*de8267e0Stimh zap_leaf_init(l, zap->zap_normflags != 0); 404fa9e4066Sahrens 40566328dd3Sahrens zap->zap_f.zap_phys->zap_num_leafs++; 406fa9e4066Sahrens 40766328dd3Sahrens return (l); 408fa9e4066Sahrens } 409fa9e4066Sahrens 410fa9e4066Sahrens int 411fa9e4066Sahrens fzap_count(zap_t *zap, uint64_t *count) 412fa9e4066Sahrens { 413fa9e4066Sahrens ASSERT(!zap->zap_ismicro); 414fa9e4066Sahrens mutex_enter(&zap->zap_f.zap_num_entries_mtx); /* unnecessary */ 415fa9e4066Sahrens *count = zap->zap_f.zap_phys->zap_num_entries; 416fa9e4066Sahrens mutex_exit(&zap->zap_f.zap_num_entries_mtx); 417fa9e4066Sahrens return (0); 418fa9e4066Sahrens } 419fa9e4066Sahrens 420fa9e4066Sahrens /* 421fa9e4066Sahrens * Routines for obtaining zap_leaf_t's 422fa9e4066Sahrens */ 423fa9e4066Sahrens 42487e5029aSahrens void 425fa9e4066Sahrens zap_put_leaf(zap_leaf_t *l) 426fa9e4066Sahrens { 427fa9e4066Sahrens rw_exit(&l->l_rwlock); 428ea8dc4b6Seschrock dmu_buf_rele(l->l_dbuf, NULL); 429fa9e4066Sahrens } 430fa9e4066Sahrens 431fa9e4066Sahrens _NOTE(ARGSUSED(0)) 432fa9e4066Sahrens static void 433fa9e4066Sahrens zap_leaf_pageout(dmu_buf_t *db, void *vl) 434fa9e4066Sahrens { 435fa9e4066Sahrens zap_leaf_t *l = vl; 436fa9e4066Sahrens 437fa9e4066Sahrens rw_destroy(&l->l_rwlock); 438fa9e4066Sahrens kmem_free(l, sizeof (zap_leaf_t)); 439fa9e4066Sahrens } 440fa9e4066Sahrens 441fa9e4066Sahrens static zap_leaf_t * 442fa9e4066Sahrens zap_open_leaf(uint64_t blkid, dmu_buf_t *db) 443fa9e4066Sahrens { 444fa9e4066Sahrens zap_leaf_t *l, *winner; 445fa9e4066Sahrens 446fa9e4066Sahrens ASSERT(blkid != 0); 447fa9e4066Sahrens 448fa9e4066Sahrens l = kmem_alloc(sizeof (zap_leaf_t), KM_SLEEP); 449fa9e4066Sahrens rw_init(&l->l_rwlock, 0, 0, 0); 450fa9e4066Sahrens rw_enter(&l->l_rwlock, RW_WRITER); 451fa9e4066Sahrens l->l_blkid = blkid; 452f65e61c0Sahrens l->l_bs = highbit(db->db_size)-1; 453fa9e4066Sahrens l->l_dbuf = db; 454fa9e4066Sahrens l->l_phys = NULL; 455fa9e4066Sahrens 456fa9e4066Sahrens winner = dmu_buf_set_user(db, l, &l->l_phys, zap_leaf_pageout); 457fa9e4066Sahrens 458fa9e4066Sahrens rw_exit(&l->l_rwlock); 459fa9e4066Sahrens if (winner != NULL) { 460fa9e4066Sahrens /* someone else set it first */ 461fa9e4066Sahrens zap_leaf_pageout(NULL, l); 462fa9e4066Sahrens l = winner; 463fa9e4066Sahrens } 464fa9e4066Sahrens 46566328dd3Sahrens /* 46666328dd3Sahrens * lhr_pad was previously used for the next leaf in the leaf 46766328dd3Sahrens * chain. There should be no chained leafs (as we have removed 46866328dd3Sahrens * support for them). 46966328dd3Sahrens */ 47066328dd3Sahrens ASSERT3U(l->l_phys->l_hdr.lh_pad1, ==, 0); 47166328dd3Sahrens 472f65e61c0Sahrens /* 473f65e61c0Sahrens * There should be more hash entries than there can be 474f65e61c0Sahrens * chunks to put in the hash table 475f65e61c0Sahrens */ 476f65e61c0Sahrens ASSERT3U(ZAP_LEAF_HASH_NUMENTRIES(l), >, ZAP_LEAF_NUMCHUNKS(l) / 3); 477f65e61c0Sahrens 478f65e61c0Sahrens /* The chunks should begin at the end of the hash table */ 479f65e61c0Sahrens ASSERT3P(&ZAP_LEAF_CHUNK(l, 0), ==, 480f65e61c0Sahrens &l->l_phys->l_hash[ZAP_LEAF_HASH_NUMENTRIES(l)]); 481f65e61c0Sahrens 482f65e61c0Sahrens /* The chunks should end at the end of the block */ 483f65e61c0Sahrens ASSERT3U((uintptr_t)&ZAP_LEAF_CHUNK(l, ZAP_LEAF_NUMCHUNKS(l)) - 484f65e61c0Sahrens (uintptr_t)l->l_phys, ==, l->l_dbuf->db_size); 485f65e61c0Sahrens 486fa9e4066Sahrens return (l); 487fa9e4066Sahrens } 488fa9e4066Sahrens 489ea8dc4b6Seschrock static int 49066328dd3Sahrens zap_get_leaf_byblk(zap_t *zap, uint64_t blkid, dmu_tx_t *tx, krw_t lt, 491ea8dc4b6Seschrock zap_leaf_t **lp) 492fa9e4066Sahrens { 493fa9e4066Sahrens dmu_buf_t *db; 494fa9e4066Sahrens zap_leaf_t *l; 495f65e61c0Sahrens int bs = FZAP_BLOCK_SHIFT(zap); 496ea8dc4b6Seschrock int err; 497fa9e4066Sahrens 498fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 499fa9e4066Sahrens 500ea8dc4b6Seschrock err = dmu_buf_hold(zap->zap_objset, zap->zap_object, 501ea8dc4b6Seschrock blkid << bs, NULL, &db); 502ea8dc4b6Seschrock if (err) 503ea8dc4b6Seschrock return (err); 504fa9e4066Sahrens 505fa9e4066Sahrens ASSERT3U(db->db_object, ==, zap->zap_object); 506f65e61c0Sahrens ASSERT3U(db->db_offset, ==, blkid << bs); 507f65e61c0Sahrens ASSERT3U(db->db_size, ==, 1 << bs); 508fa9e4066Sahrens ASSERT(blkid != 0); 509fa9e4066Sahrens 510fa9e4066Sahrens l = dmu_buf_get_user(db); 511fa9e4066Sahrens 512fa9e4066Sahrens if (l == NULL) 513fa9e4066Sahrens l = zap_open_leaf(blkid, db); 514fa9e4066Sahrens 515fa9e4066Sahrens rw_enter(&l->l_rwlock, lt); 516fa9e4066Sahrens /* 517fa9e4066Sahrens * Must lock before dirtying, otherwise l->l_phys could change, 518fa9e4066Sahrens * causing ASSERT below to fail. 519fa9e4066Sahrens */ 520fa9e4066Sahrens if (lt == RW_WRITER) 521fa9e4066Sahrens dmu_buf_will_dirty(db, tx); 522fa9e4066Sahrens ASSERT3U(l->l_blkid, ==, blkid); 523fa9e4066Sahrens ASSERT3P(l->l_dbuf, ==, db); 524fa9e4066Sahrens ASSERT3P(l->l_phys, ==, l->l_dbuf->db_data); 52566328dd3Sahrens ASSERT3U(l->l_phys->l_hdr.lh_block_type, ==, ZBT_LEAF); 52666328dd3Sahrens ASSERT3U(l->l_phys->l_hdr.lh_magic, ==, ZAP_LEAF_MAGIC); 527fa9e4066Sahrens 528ea8dc4b6Seschrock *lp = l; 529ea8dc4b6Seschrock return (0); 530fa9e4066Sahrens } 531fa9e4066Sahrens 532ea8dc4b6Seschrock static int 533ea8dc4b6Seschrock zap_idx_to_blk(zap_t *zap, uint64_t idx, uint64_t *valp) 534fa9e4066Sahrens { 535fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 536fa9e4066Sahrens 537fa9e4066Sahrens if (zap->zap_f.zap_phys->zap_ptrtbl.zt_numblks == 0) { 538fa9e4066Sahrens ASSERT3U(idx, <, 539fa9e4066Sahrens (1ULL << zap->zap_f.zap_phys->zap_ptrtbl.zt_shift)); 540ea8dc4b6Seschrock *valp = ZAP_EMBEDDED_PTRTBL_ENT(zap, idx); 541ea8dc4b6Seschrock return (0); 542fa9e4066Sahrens } else { 543fa9e4066Sahrens return (zap_table_load(zap, &zap->zap_f.zap_phys->zap_ptrtbl, 544ea8dc4b6Seschrock idx, valp)); 545fa9e4066Sahrens } 546fa9e4066Sahrens } 547fa9e4066Sahrens 548ea8dc4b6Seschrock static int 549fa9e4066Sahrens zap_set_idx_to_blk(zap_t *zap, uint64_t idx, uint64_t blk, dmu_tx_t *tx) 550fa9e4066Sahrens { 551fa9e4066Sahrens ASSERT(tx != NULL); 552fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 553fa9e4066Sahrens 554fa9e4066Sahrens if (zap->zap_f.zap_phys->zap_ptrtbl.zt_blk == 0) { 555f65e61c0Sahrens ZAP_EMBEDDED_PTRTBL_ENT(zap, idx) = blk; 556ea8dc4b6Seschrock return (0); 557fa9e4066Sahrens } else { 558ea8dc4b6Seschrock return (zap_table_store(zap, &zap->zap_f.zap_phys->zap_ptrtbl, 559ea8dc4b6Seschrock idx, blk, tx)); 560fa9e4066Sahrens } 561fa9e4066Sahrens } 562fa9e4066Sahrens 563ea8dc4b6Seschrock static int 564ea8dc4b6Seschrock zap_deref_leaf(zap_t *zap, uint64_t h, dmu_tx_t *tx, krw_t lt, zap_leaf_t **lp) 565fa9e4066Sahrens { 566ea8dc4b6Seschrock uint64_t idx, blk; 567ea8dc4b6Seschrock int err; 568fa9e4066Sahrens 569fa9e4066Sahrens ASSERT(zap->zap_dbuf == NULL || 570fa9e4066Sahrens zap->zap_f.zap_phys == zap->zap_dbuf->db_data); 571fa9e4066Sahrens ASSERT3U(zap->zap_f.zap_phys->zap_magic, ==, ZAP_MAGIC); 572fa9e4066Sahrens idx = ZAP_HASH_IDX(h, zap->zap_f.zap_phys->zap_ptrtbl.zt_shift); 573ea8dc4b6Seschrock err = zap_idx_to_blk(zap, idx, &blk); 574ea8dc4b6Seschrock if (err != 0) 575ea8dc4b6Seschrock return (err); 576ea8dc4b6Seschrock err = zap_get_leaf_byblk(zap, blk, tx, lt, lp); 577fa9e4066Sahrens 57866328dd3Sahrens ASSERT(err || ZAP_HASH_IDX(h, (*lp)->l_phys->l_hdr.lh_prefix_len) == 57966328dd3Sahrens (*lp)->l_phys->l_hdr.lh_prefix); 580ea8dc4b6Seschrock return (err); 581fa9e4066Sahrens } 582fa9e4066Sahrens 583ea8dc4b6Seschrock static int 584ad860c82Sbonwick zap_expand_leaf(zap_name_t *zn, zap_leaf_t *l, dmu_tx_t *tx, zap_leaf_t **lp) 585fa9e4066Sahrens { 586ad860c82Sbonwick zap_t *zap = zn->zn_zap; 587ad860c82Sbonwick uint64_t hash = zn->zn_hash; 588fa9e4066Sahrens zap_leaf_t *nl; 589fa9e4066Sahrens int prefix_diff, i, err; 590fa9e4066Sahrens uint64_t sibling; 59166328dd3Sahrens int old_prefix_len = l->l_phys->l_hdr.lh_prefix_len; 592fa9e4066Sahrens 59366328dd3Sahrens ASSERT3U(old_prefix_len, <=, zap->zap_f.zap_phys->zap_ptrtbl.zt_shift); 594fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 595fa9e4066Sahrens 59666328dd3Sahrens ASSERT3U(ZAP_HASH_IDX(hash, old_prefix_len), ==, 59766328dd3Sahrens l->l_phys->l_hdr.lh_prefix); 598fa9e4066Sahrens 59966328dd3Sahrens if (zap_tryupgradedir(zap, tx) == 0 || 60066328dd3Sahrens old_prefix_len == zap->zap_f.zap_phys->zap_ptrtbl.zt_shift) { 60166328dd3Sahrens /* We failed to upgrade, or need to grow the pointer table */ 602fa9e4066Sahrens objset_t *os = zap->zap_objset; 603fa9e4066Sahrens uint64_t object = zap->zap_object; 604fa9e4066Sahrens 605fa9e4066Sahrens zap_put_leaf(l); 606fa9e4066Sahrens zap_unlockdir(zap); 607c5f9e431Sahrens err = zap_lockdir(os, object, tx, RW_WRITER, 608ad860c82Sbonwick FALSE, FALSE, &zn->zn_zap); 609ad860c82Sbonwick zap = zn->zn_zap; 61066328dd3Sahrens if (err) 61166328dd3Sahrens return (err); 612fa9e4066Sahrens ASSERT(!zap->zap_ismicro); 613fa9e4066Sahrens 61466328dd3Sahrens while (old_prefix_len == 61566328dd3Sahrens zap->zap_f.zap_phys->zap_ptrtbl.zt_shift) { 61666328dd3Sahrens err = zap_grow_ptrtbl(zap, tx); 61766328dd3Sahrens if (err) 61866328dd3Sahrens return (err); 61966328dd3Sahrens } 62066328dd3Sahrens 62166328dd3Sahrens err = zap_deref_leaf(zap, hash, tx, RW_WRITER, &l); 62266328dd3Sahrens if (err) 62366328dd3Sahrens return (err); 62466328dd3Sahrens 62566328dd3Sahrens if (l->l_phys->l_hdr.lh_prefix_len != old_prefix_len) { 626fa9e4066Sahrens /* it split while our locks were down */ 627ea8dc4b6Seschrock *lp = l; 628ea8dc4b6Seschrock return (0); 629ea8dc4b6Seschrock } 630fa9e4066Sahrens } 631fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 63266328dd3Sahrens ASSERT3U(old_prefix_len, <, zap->zap_f.zap_phys->zap_ptrtbl.zt_shift); 63366328dd3Sahrens ASSERT3U(ZAP_HASH_IDX(hash, old_prefix_len), ==, 63466328dd3Sahrens l->l_phys->l_hdr.lh_prefix); 635fa9e4066Sahrens 63666328dd3Sahrens prefix_diff = zap->zap_f.zap_phys->zap_ptrtbl.zt_shift - 63766328dd3Sahrens (old_prefix_len + 1); 63866328dd3Sahrens sibling = (ZAP_HASH_IDX(hash, old_prefix_len + 1) | 1) << prefix_diff; 639ea8dc4b6Seschrock 640ea8dc4b6Seschrock /* check for i/o errors before doing zap_leaf_split */ 641fa9e4066Sahrens for (i = 0; i < (1ULL<<prefix_diff); i++) { 642ea8dc4b6Seschrock uint64_t blk; 643ea8dc4b6Seschrock err = zap_idx_to_blk(zap, sibling+i, &blk); 644ea8dc4b6Seschrock if (err) 645ea8dc4b6Seschrock return (err); 646ea8dc4b6Seschrock ASSERT3U(blk, ==, l->l_blkid); 647ea8dc4b6Seschrock } 648ea8dc4b6Seschrock 64966328dd3Sahrens nl = zap_create_leaf(zap, tx); 650*de8267e0Stimh zap_leaf_split(l, nl, zap->zap_normflags != 0); 651ea8dc4b6Seschrock 65266328dd3Sahrens /* set sibling pointers */ 653ea8dc4b6Seschrock for (i = 0; i < (1ULL<<prefix_diff); i++) { 654ea8dc4b6Seschrock err = zap_set_idx_to_blk(zap, sibling+i, nl->l_blkid, tx); 655ea8dc4b6Seschrock ASSERT3U(err, ==, 0); /* we checked for i/o errors above */ 656fa9e4066Sahrens } 657fa9e4066Sahrens 65866328dd3Sahrens if (hash & (1ULL << (64 - l->l_phys->l_hdr.lh_prefix_len))) { 659fa9e4066Sahrens /* we want the sibling */ 660fa9e4066Sahrens zap_put_leaf(l); 66166328dd3Sahrens *lp = nl; 662fa9e4066Sahrens } else { 663fa9e4066Sahrens zap_put_leaf(nl); 66466328dd3Sahrens *lp = l; 665fa9e4066Sahrens } 666fa9e4066Sahrens 667ea8dc4b6Seschrock return (0); 668fa9e4066Sahrens } 669fa9e4066Sahrens 670fa9e4066Sahrens static void 671ad860c82Sbonwick zap_put_leaf_maybe_grow_ptrtbl(zap_name_t *zn, zap_leaf_t *l, dmu_tx_t *tx) 672fa9e4066Sahrens { 673ad860c82Sbonwick zap_t *zap = zn->zn_zap; 67466328dd3Sahrens int shift = zap->zap_f.zap_phys->zap_ptrtbl.zt_shift; 67566328dd3Sahrens int leaffull = (l->l_phys->l_hdr.lh_prefix_len == shift && 67666328dd3Sahrens l->l_phys->l_hdr.lh_nfree < ZAP_LEAF_LOW_WATER); 677fa9e4066Sahrens 67866328dd3Sahrens zap_put_leaf(l); 679fa9e4066Sahrens 68066328dd3Sahrens if (leaffull || zap->zap_f.zap_phys->zap_ptrtbl.zt_nextblk) { 68166328dd3Sahrens int err; 682fa9e4066Sahrens 68366328dd3Sahrens /* 68466328dd3Sahrens * We are in the middle of growing the pointer table, or 68566328dd3Sahrens * this leaf will soon make us grow it. 68666328dd3Sahrens */ 687fa9e4066Sahrens if (zap_tryupgradedir(zap, tx) == 0) { 688fa9e4066Sahrens objset_t *os = zap->zap_objset; 689fa9e4066Sahrens uint64_t zapobj = zap->zap_object; 690fa9e4066Sahrens 691fa9e4066Sahrens zap_unlockdir(zap); 692fa9e4066Sahrens err = zap_lockdir(os, zapobj, tx, 693ad860c82Sbonwick RW_WRITER, FALSE, FALSE, &zn->zn_zap); 694ad860c82Sbonwick zap = zn->zn_zap; 69566328dd3Sahrens if (err) 69666328dd3Sahrens return; 697fa9e4066Sahrens } 698fa9e4066Sahrens 69966328dd3Sahrens /* could have finished growing while our locks were down */ 70066328dd3Sahrens if (zap->zap_f.zap_phys->zap_ptrtbl.zt_shift == shift) 70166328dd3Sahrens (void) zap_grow_ptrtbl(zap, tx); 702fa9e4066Sahrens } 703fa9e4066Sahrens } 704fa9e4066Sahrens 705fa9e4066Sahrens 706fa9e4066Sahrens static int 70766328dd3Sahrens fzap_checksize(const char *name, uint64_t integer_size, uint64_t num_integers) 708fa9e4066Sahrens { 70966328dd3Sahrens if (name && strlen(name) > ZAP_MAXNAMELEN) 71066328dd3Sahrens return (E2BIG); 71166328dd3Sahrens 712fa9e4066Sahrens /* Only integer sizes supported by C */ 713fa9e4066Sahrens switch (integer_size) { 714fa9e4066Sahrens case 1: 715fa9e4066Sahrens case 2: 716fa9e4066Sahrens case 4: 717fa9e4066Sahrens case 8: 718fa9e4066Sahrens break; 719fa9e4066Sahrens default: 720fa9e4066Sahrens return (EINVAL); 721fa9e4066Sahrens } 722fa9e4066Sahrens 72366328dd3Sahrens if (integer_size * num_integers > ZAP_MAXVALUELEN) 72466328dd3Sahrens return (E2BIG); 725fa9e4066Sahrens 726fa9e4066Sahrens return (0); 727fa9e4066Sahrens } 728fa9e4066Sahrens 729fa9e4066Sahrens /* 730da6c28aaSamw * Routines for manipulating attributes. 731fa9e4066Sahrens */ 732fa9e4066Sahrens int 733da6c28aaSamw fzap_lookup(zap_name_t *zn, 734da6c28aaSamw uint64_t integer_size, uint64_t num_integers, void *buf, 735da6c28aaSamw char *realname, int rn_len, boolean_t *ncp) 736fa9e4066Sahrens { 737fa9e4066Sahrens zap_leaf_t *l; 738fa9e4066Sahrens int err; 739fa9e4066Sahrens zap_entry_handle_t zeh; 740fa9e4066Sahrens 741da6c28aaSamw err = fzap_checksize(zn->zn_name_orij, integer_size, num_integers); 742fa9e4066Sahrens if (err != 0) 743fa9e4066Sahrens return (err); 744fa9e4066Sahrens 745da6c28aaSamw err = zap_deref_leaf(zn->zn_zap, zn->zn_hash, NULL, RW_READER, &l); 746ea8dc4b6Seschrock if (err != 0) 747ea8dc4b6Seschrock return (err); 748da6c28aaSamw err = zap_leaf_lookup(l, zn, &zeh); 749da6c28aaSamw if (err == 0) { 75066328dd3Sahrens err = zap_entry_read(&zeh, integer_size, num_integers, buf); 751da6c28aaSamw (void) zap_entry_read_name(&zeh, rn_len, realname); 752da6c28aaSamw if (ncp) { 753da6c28aaSamw *ncp = zap_entry_normalization_conflict(&zeh, 754da6c28aaSamw zn, NULL, zn->zn_zap); 755da6c28aaSamw } 756da6c28aaSamw } 75766328dd3Sahrens 758fa9e4066Sahrens zap_put_leaf(l); 759fa9e4066Sahrens return (err); 760fa9e4066Sahrens } 761fa9e4066Sahrens 762fa9e4066Sahrens int 763da6c28aaSamw fzap_add_cd(zap_name_t *zn, 764fa9e4066Sahrens uint64_t integer_size, uint64_t num_integers, 765ea8dc4b6Seschrock const void *val, uint32_t cd, dmu_tx_t *tx) 766fa9e4066Sahrens { 767fa9e4066Sahrens zap_leaf_t *l; 768fa9e4066Sahrens int err; 769fa9e4066Sahrens zap_entry_handle_t zeh; 770da6c28aaSamw zap_t *zap = zn->zn_zap; 771fa9e4066Sahrens 772fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 773fa9e4066Sahrens ASSERT(!zap->zap_ismicro); 774da6c28aaSamw ASSERT(fzap_checksize(zn->zn_name_orij, 775da6c28aaSamw integer_size, num_integers) == 0); 776fa9e4066Sahrens 777da6c28aaSamw err = zap_deref_leaf(zap, zn->zn_hash, tx, RW_WRITER, &l); 778ea8dc4b6Seschrock if (err != 0) 779ea8dc4b6Seschrock return (err); 780fa9e4066Sahrens retry: 781da6c28aaSamw err = zap_leaf_lookup(l, zn, &zeh); 782fa9e4066Sahrens if (err == 0) { 783fa9e4066Sahrens err = EEXIST; 784fa9e4066Sahrens goto out; 785fa9e4066Sahrens } 786ea8dc4b6Seschrock if (err != ENOENT) 787ea8dc4b6Seschrock goto out; 788fa9e4066Sahrens 789da6c28aaSamw err = zap_entry_create(l, zn->zn_name_orij, zn->zn_hash, cd, 790fa9e4066Sahrens integer_size, num_integers, val, &zeh); 791fa9e4066Sahrens 792fa9e4066Sahrens if (err == 0) { 793fa9e4066Sahrens zap_increment_num_entries(zap, 1, tx); 794fa9e4066Sahrens } else if (err == EAGAIN) { 795ad860c82Sbonwick err = zap_expand_leaf(zn, l, tx, &l); 796ad860c82Sbonwick zap = zn->zn_zap; /* zap_expand_leaf() may change zap */ 79766328dd3Sahrens if (err == 0) 79866328dd3Sahrens goto retry; 799fa9e4066Sahrens } 800fa9e4066Sahrens 801fa9e4066Sahrens out: 802ad860c82Sbonwick if (zap != NULL) 803ad860c82Sbonwick zap_put_leaf_maybe_grow_ptrtbl(zn, l, tx); 804fa9e4066Sahrens return (err); 805fa9e4066Sahrens } 806fa9e4066Sahrens 807fa9e4066Sahrens int 808da6c28aaSamw fzap_add(zap_name_t *zn, 809fa9e4066Sahrens uint64_t integer_size, uint64_t num_integers, 810fa9e4066Sahrens const void *val, dmu_tx_t *tx) 811fa9e4066Sahrens { 812da6c28aaSamw int err = fzap_checksize(zn->zn_name_orij, integer_size, num_integers); 813fa9e4066Sahrens if (err != 0) 814fa9e4066Sahrens return (err); 815fa9e4066Sahrens 816da6c28aaSamw return (fzap_add_cd(zn, integer_size, num_integers, 81766328dd3Sahrens val, ZAP_MAXCD, tx)); 818fa9e4066Sahrens } 819fa9e4066Sahrens 820fa9e4066Sahrens int 821da6c28aaSamw fzap_update(zap_name_t *zn, 822fa9e4066Sahrens int integer_size, uint64_t num_integers, const void *val, dmu_tx_t *tx) 823fa9e4066Sahrens { 824fa9e4066Sahrens zap_leaf_t *l; 825fa9e4066Sahrens int err, create; 826fa9e4066Sahrens zap_entry_handle_t zeh; 827da6c28aaSamw zap_t *zap = zn->zn_zap; 828fa9e4066Sahrens 829fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 830da6c28aaSamw err = fzap_checksize(zn->zn_name_orij, integer_size, num_integers); 831fa9e4066Sahrens if (err != 0) 832fa9e4066Sahrens return (err); 833fa9e4066Sahrens 834da6c28aaSamw err = zap_deref_leaf(zap, zn->zn_hash, tx, RW_WRITER, &l); 835ea8dc4b6Seschrock if (err != 0) 836ea8dc4b6Seschrock return (err); 837fa9e4066Sahrens retry: 838da6c28aaSamw err = zap_leaf_lookup(l, zn, &zeh); 839fa9e4066Sahrens create = (err == ENOENT); 840fa9e4066Sahrens ASSERT(err == 0 || err == ENOENT); 841fa9e4066Sahrens 842fa9e4066Sahrens if (create) { 843da6c28aaSamw err = zap_entry_create(l, zn->zn_name_orij, zn->zn_hash, 844da6c28aaSamw ZAP_MAXCD, integer_size, num_integers, val, &zeh); 845fa9e4066Sahrens if (err == 0) 846fa9e4066Sahrens zap_increment_num_entries(zap, 1, tx); 847fa9e4066Sahrens } else { 848fa9e4066Sahrens err = zap_entry_update(&zeh, integer_size, num_integers, val); 849fa9e4066Sahrens } 850fa9e4066Sahrens 851fa9e4066Sahrens if (err == EAGAIN) { 852ad860c82Sbonwick err = zap_expand_leaf(zn, l, tx, &l); 853ad860c82Sbonwick zap = zn->zn_zap; /* zap_expand_leaf() may change zap */ 85466328dd3Sahrens if (err == 0) 85566328dd3Sahrens goto retry; 856fa9e4066Sahrens } 857fa9e4066Sahrens 858ad860c82Sbonwick if (zap != NULL) 859ad860c82Sbonwick zap_put_leaf_maybe_grow_ptrtbl(zn, l, tx); 860fa9e4066Sahrens return (err); 861fa9e4066Sahrens } 862fa9e4066Sahrens 863fa9e4066Sahrens int 864da6c28aaSamw fzap_length(zap_name_t *zn, 865fa9e4066Sahrens uint64_t *integer_size, uint64_t *num_integers) 866fa9e4066Sahrens { 867fa9e4066Sahrens zap_leaf_t *l; 868fa9e4066Sahrens int err; 869fa9e4066Sahrens zap_entry_handle_t zeh; 870fa9e4066Sahrens 871da6c28aaSamw err = zap_deref_leaf(zn->zn_zap, zn->zn_hash, NULL, RW_READER, &l); 872ea8dc4b6Seschrock if (err != 0) 873ea8dc4b6Seschrock return (err); 874da6c28aaSamw err = zap_leaf_lookup(l, zn, &zeh); 875fa9e4066Sahrens if (err != 0) 876fa9e4066Sahrens goto out; 877fa9e4066Sahrens 878fa9e4066Sahrens if (integer_size) 879fa9e4066Sahrens *integer_size = zeh.zeh_integer_size; 880fa9e4066Sahrens if (num_integers) 881fa9e4066Sahrens *num_integers = zeh.zeh_num_integers; 882fa9e4066Sahrens out: 883fa9e4066Sahrens zap_put_leaf(l); 884fa9e4066Sahrens return (err); 885fa9e4066Sahrens } 886fa9e4066Sahrens 887fa9e4066Sahrens int 888da6c28aaSamw fzap_remove(zap_name_t *zn, dmu_tx_t *tx) 889fa9e4066Sahrens { 890fa9e4066Sahrens zap_leaf_t *l; 891fa9e4066Sahrens int err; 892fa9e4066Sahrens zap_entry_handle_t zeh; 893fa9e4066Sahrens 894da6c28aaSamw err = zap_deref_leaf(zn->zn_zap, zn->zn_hash, tx, RW_WRITER, &l); 895ea8dc4b6Seschrock if (err != 0) 896ea8dc4b6Seschrock return (err); 897da6c28aaSamw err = zap_leaf_lookup(l, zn, &zeh); 898fa9e4066Sahrens if (err == 0) { 899fa9e4066Sahrens zap_entry_remove(&zeh); 900da6c28aaSamw zap_increment_num_entries(zn->zn_zap, -1, tx); 901fa9e4066Sahrens } 902fa9e4066Sahrens zap_put_leaf(l); 903fa9e4066Sahrens return (err); 904fa9e4066Sahrens } 905fa9e4066Sahrens 906fa9e4066Sahrens int 907e7437265Sahrens zap_value_search(objset_t *os, uint64_t zapobj, uint64_t value, uint64_t mask, 908e7437265Sahrens char *name) 909fa9e4066Sahrens { 910fa9e4066Sahrens zap_cursor_t zc; 911fa9e4066Sahrens zap_attribute_t *za; 912fa9e4066Sahrens int err; 913fa9e4066Sahrens 914e7437265Sahrens if (mask == 0) 915e7437265Sahrens mask = -1ULL; 916e7437265Sahrens 917fa9e4066Sahrens za = kmem_alloc(sizeof (zap_attribute_t), KM_SLEEP); 918fa9e4066Sahrens for (zap_cursor_init(&zc, os, zapobj); 919fa9e4066Sahrens (err = zap_cursor_retrieve(&zc, za)) == 0; 920fa9e4066Sahrens zap_cursor_advance(&zc)) { 921e7437265Sahrens if ((za->za_first_integer & mask) == (value & mask)) { 922fa9e4066Sahrens (void) strcpy(name, za->za_name); 923fa9e4066Sahrens break; 924fa9e4066Sahrens } 925fa9e4066Sahrens } 92687e5029aSahrens zap_cursor_fini(&zc); 927fa9e4066Sahrens kmem_free(za, sizeof (zap_attribute_t)); 928fa9e4066Sahrens return (err); 929fa9e4066Sahrens } 930fa9e4066Sahrens 931fa9e4066Sahrens 932fa9e4066Sahrens /* 933fa9e4066Sahrens * Routines for iterating over the attributes. 934fa9e4066Sahrens */ 935fa9e4066Sahrens 936fa9e4066Sahrens int 937fa9e4066Sahrens fzap_cursor_retrieve(zap_t *zap, zap_cursor_t *zc, zap_attribute_t *za) 938fa9e4066Sahrens { 939fa9e4066Sahrens int err = ENOENT; 940fa9e4066Sahrens zap_entry_handle_t zeh; 941fa9e4066Sahrens zap_leaf_t *l; 942fa9e4066Sahrens 943fa9e4066Sahrens /* retrieve the next entry at or after zc_hash/zc_cd */ 944fa9e4066Sahrens /* if no entry, return ENOENT */ 945fa9e4066Sahrens 94687e5029aSahrens if (zc->zc_leaf && 94766328dd3Sahrens (ZAP_HASH_IDX(zc->zc_hash, 94866328dd3Sahrens zc->zc_leaf->l_phys->l_hdr.lh_prefix_len) != 94966328dd3Sahrens zc->zc_leaf->l_phys->l_hdr.lh_prefix)) { 95087e5029aSahrens rw_enter(&zc->zc_leaf->l_rwlock, RW_READER); 95187e5029aSahrens zap_put_leaf(zc->zc_leaf); 95287e5029aSahrens zc->zc_leaf = NULL; 95387e5029aSahrens } 95487e5029aSahrens 955fa9e4066Sahrens again: 95687e5029aSahrens if (zc->zc_leaf == NULL) { 957ea8dc4b6Seschrock err = zap_deref_leaf(zap, zc->zc_hash, NULL, RW_READER, 958ea8dc4b6Seschrock &zc->zc_leaf); 959ea8dc4b6Seschrock if (err != 0) 960ea8dc4b6Seschrock return (err); 96187e5029aSahrens } else { 96287e5029aSahrens rw_enter(&zc->zc_leaf->l_rwlock, RW_READER); 96387e5029aSahrens } 96487e5029aSahrens l = zc->zc_leaf; 96587e5029aSahrens 966fa9e4066Sahrens err = zap_leaf_lookup_closest(l, zc->zc_hash, zc->zc_cd, &zeh); 967fa9e4066Sahrens 968fa9e4066Sahrens if (err == ENOENT) { 96966328dd3Sahrens uint64_t nocare = 97066328dd3Sahrens (1ULL << (64 - l->l_phys->l_hdr.lh_prefix_len)) - 1; 971fa9e4066Sahrens zc->zc_hash = (zc->zc_hash & ~nocare) + nocare + 1; 972fa9e4066Sahrens zc->zc_cd = 0; 97366328dd3Sahrens if (l->l_phys->l_hdr.lh_prefix_len == 0 || zc->zc_hash == 0) { 974fa9e4066Sahrens zc->zc_hash = -1ULL; 975fa9e4066Sahrens } else { 97687e5029aSahrens zap_put_leaf(zc->zc_leaf); 97787e5029aSahrens zc->zc_leaf = NULL; 978fa9e4066Sahrens goto again; 979fa9e4066Sahrens } 980fa9e4066Sahrens } 981fa9e4066Sahrens 982fa9e4066Sahrens if (err == 0) { 983fa9e4066Sahrens zc->zc_hash = zeh.zeh_hash; 984fa9e4066Sahrens zc->zc_cd = zeh.zeh_cd; 985fa9e4066Sahrens za->za_integer_length = zeh.zeh_integer_size; 986fa9e4066Sahrens za->za_num_integers = zeh.zeh_num_integers; 987fa9e4066Sahrens if (zeh.zeh_num_integers == 0) { 988fa9e4066Sahrens za->za_first_integer = 0; 989fa9e4066Sahrens } else { 990fa9e4066Sahrens err = zap_entry_read(&zeh, 8, 1, &za->za_first_integer); 991fa9e4066Sahrens ASSERT(err == 0 || err == EOVERFLOW); 992fa9e4066Sahrens } 993fa9e4066Sahrens err = zap_entry_read_name(&zeh, 994fa9e4066Sahrens sizeof (za->za_name), za->za_name); 995fa9e4066Sahrens ASSERT(err == 0); 996da6c28aaSamw 997da6c28aaSamw za->za_normalization_conflict = 998da6c28aaSamw zap_entry_normalization_conflict(&zeh, 999da6c28aaSamw NULL, za->za_name, zap); 1000fa9e4066Sahrens } 100187e5029aSahrens rw_exit(&zc->zc_leaf->l_rwlock); 1002fa9e4066Sahrens return (err); 1003fa9e4066Sahrens } 1004fa9e4066Sahrens 1005fa9e4066Sahrens 1006fa9e4066Sahrens static void 1007fa9e4066Sahrens zap_stats_ptrtbl(zap_t *zap, uint64_t *tbl, int len, zap_stats_t *zs) 1008fa9e4066Sahrens { 1009ea8dc4b6Seschrock int i, err; 1010fa9e4066Sahrens uint64_t lastblk = 0; 1011fa9e4066Sahrens 1012fa9e4066Sahrens /* 1013fa9e4066Sahrens * NB: if a leaf has more pointers than an entire ptrtbl block 1014fa9e4066Sahrens * can hold, then it'll be accounted for more than once, since 1015fa9e4066Sahrens * we won't have lastblk. 1016fa9e4066Sahrens */ 1017fa9e4066Sahrens for (i = 0; i < len; i++) { 1018fa9e4066Sahrens zap_leaf_t *l; 1019fa9e4066Sahrens 1020fa9e4066Sahrens if (tbl[i] == lastblk) 1021fa9e4066Sahrens continue; 1022fa9e4066Sahrens lastblk = tbl[i]; 1023fa9e4066Sahrens 1024ea8dc4b6Seschrock err = zap_get_leaf_byblk(zap, tbl[i], NULL, RW_READER, &l); 1025ea8dc4b6Seschrock if (err == 0) { 102666328dd3Sahrens zap_leaf_stats(zap, l, zs); 1027ea8dc4b6Seschrock zap_put_leaf(l); 1028ea8dc4b6Seschrock } 1029fa9e4066Sahrens } 1030fa9e4066Sahrens } 1031fa9e4066Sahrens 1032fa9e4066Sahrens void 1033fa9e4066Sahrens fzap_get_stats(zap_t *zap, zap_stats_t *zs) 1034fa9e4066Sahrens { 1035f65e61c0Sahrens int bs = FZAP_BLOCK_SHIFT(zap); 1036f65e61c0Sahrens zs->zs_blocksize = 1ULL << bs; 10378248818dSnd 10388248818dSnd /* 10398248818dSnd * Set zap_phys_t fields 10408248818dSnd */ 1041fa9e4066Sahrens zs->zs_num_leafs = zap->zap_f.zap_phys->zap_num_leafs; 1042fa9e4066Sahrens zs->zs_num_entries = zap->zap_f.zap_phys->zap_num_entries; 1043fa9e4066Sahrens zs->zs_num_blocks = zap->zap_f.zap_phys->zap_freeblk; 10448248818dSnd zs->zs_block_type = zap->zap_f.zap_phys->zap_block_type; 10458248818dSnd zs->zs_magic = zap->zap_f.zap_phys->zap_magic; 10468248818dSnd zs->zs_salt = zap->zap_f.zap_phys->zap_salt; 10478248818dSnd 10488248818dSnd /* 10498248818dSnd * Set zap_ptrtbl fields 10508248818dSnd */ 10518248818dSnd zs->zs_ptrtbl_len = 1ULL << zap->zap_f.zap_phys->zap_ptrtbl.zt_shift; 10528248818dSnd zs->zs_ptrtbl_nextblk = zap->zap_f.zap_phys->zap_ptrtbl.zt_nextblk; 10538248818dSnd zs->zs_ptrtbl_blks_copied = 10548248818dSnd zap->zap_f.zap_phys->zap_ptrtbl.zt_blks_copied; 10558248818dSnd zs->zs_ptrtbl_zt_blk = zap->zap_f.zap_phys->zap_ptrtbl.zt_blk; 10568248818dSnd zs->zs_ptrtbl_zt_numblks = zap->zap_f.zap_phys->zap_ptrtbl.zt_numblks; 10578248818dSnd zs->zs_ptrtbl_zt_shift = zap->zap_f.zap_phys->zap_ptrtbl.zt_shift; 1058fa9e4066Sahrens 1059fa9e4066Sahrens if (zap->zap_f.zap_phys->zap_ptrtbl.zt_numblks == 0) { 1060fa9e4066Sahrens /* the ptrtbl is entirely in the header block. */ 1061f65e61c0Sahrens zap_stats_ptrtbl(zap, &ZAP_EMBEDDED_PTRTBL_ENT(zap, 0), 1062f65e61c0Sahrens 1 << ZAP_EMBEDDED_PTRTBL_SHIFT(zap), zs); 1063fa9e4066Sahrens } else { 1064fa9e4066Sahrens int b; 1065fa9e4066Sahrens 1066fa9e4066Sahrens dmu_prefetch(zap->zap_objset, zap->zap_object, 1067f65e61c0Sahrens zap->zap_f.zap_phys->zap_ptrtbl.zt_blk << bs, 1068f65e61c0Sahrens zap->zap_f.zap_phys->zap_ptrtbl.zt_numblks << bs); 1069fa9e4066Sahrens 1070fa9e4066Sahrens for (b = 0; b < zap->zap_f.zap_phys->zap_ptrtbl.zt_numblks; 1071fa9e4066Sahrens b++) { 1072fa9e4066Sahrens dmu_buf_t *db; 1073ea8dc4b6Seschrock int err; 1074ea8dc4b6Seschrock 1075ea8dc4b6Seschrock err = dmu_buf_hold(zap->zap_objset, zap->zap_object, 1076ea8dc4b6Seschrock (zap->zap_f.zap_phys->zap_ptrtbl.zt_blk + b) << bs, 1077ea8dc4b6Seschrock FTAG, &db); 1078ea8dc4b6Seschrock if (err == 0) { 1079ea8dc4b6Seschrock zap_stats_ptrtbl(zap, db->db_data, 1080ea8dc4b6Seschrock 1<<(bs-3), zs); 1081ea8dc4b6Seschrock dmu_buf_rele(db, FTAG); 1082ea8dc4b6Seschrock } 1083fa9e4066Sahrens } 1084fa9e4066Sahrens } 1085fa9e4066Sahrens } 1086