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 /* 22478ed9adSEric Taylor * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 23fa9e4066Sahrens * Use is subject to license terms. 24fa9e4066Sahrens */ 25fa9e4066Sahrens 26fa9e4066Sahrens /* 27fa9e4066Sahrens * This file contains the top half of the zfs directory structure 28fa9e4066Sahrens * implementation. The bottom half is in zap_leaf.c. 29fa9e4066Sahrens * 30fa9e4066Sahrens * The zdir is an extendable hash data structure. There is a table of 31fa9e4066Sahrens * pointers to buckets (zap_t->zd_data->zd_leafs). The buckets are 32fa9e4066Sahrens * each a constant size and hold a variable number of directory entries. 33fa9e4066Sahrens * The buckets (aka "leaf nodes") are implemented in zap_leaf.c. 34fa9e4066Sahrens * 35fa9e4066Sahrens * The pointer table holds a power of 2 number of pointers. 36fa9e4066Sahrens * (1<<zap_t->zd_data->zd_phys->zd_prefix_len). The bucket pointed to 37fa9e4066Sahrens * by the pointer at index i in the table holds entries whose hash value 38fa9e4066Sahrens * has a zd_prefix_len - bit prefix 39fa9e4066Sahrens */ 40fa9e4066Sahrens 41fa9e4066Sahrens #include <sys/spa.h> 42fa9e4066Sahrens #include <sys/dmu.h> 43fa9e4066Sahrens #include <sys/zfs_context.h> 44de8267e0Stimh #include <sys/zfs_znode.h> 45478ed9adSEric Taylor #include <sys/fs/zfs.h> 46fa9e4066Sahrens #include <sys/zap.h> 47ea8dc4b6Seschrock #include <sys/refcount.h> 48fa9e4066Sahrens #include <sys/zap_impl.h> 49fa9e4066Sahrens #include <sys/zap_leaf.h> 50fa9e4066Sahrens 51f65e61c0Sahrens int fzap_default_block_shift = 14; /* 16k blocksize */ 52fa9e4066Sahrens 53fa9e4066Sahrens static void zap_leaf_pageout(dmu_buf_t *db, void *vl); 5466328dd3Sahrens static uint64_t zap_allocate_blocks(zap_t *zap, int nblocks); 55fa9e4066Sahrens 56fa9e4066Sahrens 57fa9e4066Sahrens void 58fa9e4066Sahrens fzap_byteswap(void *vbuf, size_t size) 59fa9e4066Sahrens { 60fa9e4066Sahrens uint64_t block_type; 61fa9e4066Sahrens 62fa9e4066Sahrens block_type = *(uint64_t *)vbuf; 63fa9e4066Sahrens 645ad82045Snd if (block_type == ZBT_LEAF || block_type == BSWAP_64(ZBT_LEAF)) 65f65e61c0Sahrens zap_leaf_byteswap(vbuf, size); 665ad82045Snd else { 67fa9e4066Sahrens /* it's a ptrtbl block */ 68f65e61c0Sahrens byteswap_uint64_array(vbuf, size); 69fa9e4066Sahrens } 70fa9e4066Sahrens } 71fa9e4066Sahrens 72fa9e4066Sahrens void 73*b24ab676SJeff Bonwick fzap_upgrade(zap_t *zap, dmu_tx_t *tx, zap_flags_t flags) 74fa9e4066Sahrens { 75fa9e4066Sahrens dmu_buf_t *db; 76fa9e4066Sahrens zap_leaf_t *l; 77fa9e4066Sahrens int i; 78fa9e4066Sahrens zap_phys_t *zp; 79fa9e4066Sahrens 80fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 81fa9e4066Sahrens zap->zap_ismicro = FALSE; 82fa9e4066Sahrens 83fa9e4066Sahrens (void) dmu_buf_update_user(zap->zap_dbuf, zap, zap, 84455d5089Sahrens &zap->zap_f.zap_phys, zap_evict); 85fa9e4066Sahrens 86fa9e4066Sahrens mutex_init(&zap->zap_f.zap_num_entries_mtx, 0, 0, 0); 87f65e61c0Sahrens zap->zap_f.zap_block_shift = highbit(zap->zap_dbuf->db_size) - 1; 88fa9e4066Sahrens 89fa9e4066Sahrens zp = zap->zap_f.zap_phys; 90fa9e4066Sahrens /* 91fa9e4066Sahrens * explicitly zero it since it might be coming from an 92fa9e4066Sahrens * initialized microzap 93fa9e4066Sahrens */ 94f65e61c0Sahrens bzero(zap->zap_dbuf->db_data, zap->zap_dbuf->db_size); 95fa9e4066Sahrens zp->zap_block_type = ZBT_HEADER; 96fa9e4066Sahrens zp->zap_magic = ZAP_MAGIC; 97fa9e4066Sahrens 98f65e61c0Sahrens zp->zap_ptrtbl.zt_shift = ZAP_EMBEDDED_PTRTBL_SHIFT(zap); 99fa9e4066Sahrens 100fa9e4066Sahrens zp->zap_freeblk = 2; /* block 1 will be the first leaf */ 101fa9e4066Sahrens zp->zap_num_leafs = 1; 102fa9e4066Sahrens zp->zap_num_entries = 0; 103fa9e4066Sahrens zp->zap_salt = zap->zap_salt; 104da6c28aaSamw zp->zap_normflags = zap->zap_normflags; 105*b24ab676SJeff Bonwick zp->zap_flags = flags; 106fa9e4066Sahrens 107f65e61c0Sahrens /* block 1 will be the first leaf */ 108f65e61c0Sahrens for (i = 0; i < (1<<zp->zap_ptrtbl.zt_shift); i++) 109f65e61c0Sahrens ZAP_EMBEDDED_PTRTBL_ENT(zap, i) = 1; 110fa9e4066Sahrens 111fa9e4066Sahrens /* 112fa9e4066Sahrens * set up block 1 - the first leaf 113fa9e4066Sahrens */ 114ea8dc4b6Seschrock VERIFY(0 == dmu_buf_hold(zap->zap_objset, zap->zap_object, 115ea8dc4b6Seschrock 1<<FZAP_BLOCK_SHIFT(zap), FTAG, &db)); 116fa9e4066Sahrens dmu_buf_will_dirty(db, tx); 117fa9e4066Sahrens 118fa9e4066Sahrens l = kmem_zalloc(sizeof (zap_leaf_t), KM_SLEEP); 119fa9e4066Sahrens l->l_dbuf = db; 120fa9e4066Sahrens l->l_phys = db->db_data; 121fa9e4066Sahrens 122de8267e0Stimh zap_leaf_init(l, zp->zap_normflags != 0); 123fa9e4066Sahrens 124fa9e4066Sahrens kmem_free(l, sizeof (zap_leaf_t)); 125ea8dc4b6Seschrock dmu_buf_rele(db, FTAG); 126fa9e4066Sahrens } 127fa9e4066Sahrens 128fa9e4066Sahrens static int 129fa9e4066Sahrens zap_tryupgradedir(zap_t *zap, dmu_tx_t *tx) 130fa9e4066Sahrens { 131fa9e4066Sahrens if (RW_WRITE_HELD(&zap->zap_rwlock)) 132fa9e4066Sahrens return (1); 133fa9e4066Sahrens if (rw_tryupgrade(&zap->zap_rwlock)) { 134fa9e4066Sahrens dmu_buf_will_dirty(zap->zap_dbuf, tx); 135fa9e4066Sahrens return (1); 136fa9e4066Sahrens } 137fa9e4066Sahrens return (0); 138fa9e4066Sahrens } 139fa9e4066Sahrens 140fa9e4066Sahrens /* 141fa9e4066Sahrens * Generic routines for dealing with the pointer & cookie tables. 142fa9e4066Sahrens */ 143fa9e4066Sahrens 14466328dd3Sahrens static int 145fa9e4066Sahrens zap_table_grow(zap_t *zap, zap_table_phys_t *tbl, 146fa9e4066Sahrens void (*transfer_func)(const uint64_t *src, uint64_t *dst, int n), 147fa9e4066Sahrens dmu_tx_t *tx) 148fa9e4066Sahrens { 149fa9e4066Sahrens uint64_t b, newblk; 150fa9e4066Sahrens dmu_buf_t *db_old, *db_new; 151ea8dc4b6Seschrock int err; 152f65e61c0Sahrens int bs = FZAP_BLOCK_SHIFT(zap); 153f65e61c0Sahrens int hepb = 1<<(bs-4); 154fa9e4066Sahrens /* hepb = half the number of entries in a block */ 155fa9e4066Sahrens 156fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 157fa9e4066Sahrens ASSERT(tbl->zt_blk != 0); 158fa9e4066Sahrens ASSERT(tbl->zt_numblks > 0); 159fa9e4066Sahrens 160fa9e4066Sahrens if (tbl->zt_nextblk != 0) { 161fa9e4066Sahrens newblk = tbl->zt_nextblk; 162fa9e4066Sahrens } else { 16366328dd3Sahrens newblk = zap_allocate_blocks(zap, tbl->zt_numblks * 2); 164fa9e4066Sahrens tbl->zt_nextblk = newblk; 165fa9e4066Sahrens ASSERT3U(tbl->zt_blks_copied, ==, 0); 166fa9e4066Sahrens dmu_prefetch(zap->zap_objset, zap->zap_object, 167f65e61c0Sahrens tbl->zt_blk << bs, tbl->zt_numblks << bs); 168fa9e4066Sahrens } 169fa9e4066Sahrens 170fa9e4066Sahrens /* 17166328dd3Sahrens * Copy the ptrtbl from the old to new location. 172fa9e4066Sahrens */ 173fa9e4066Sahrens 174fa9e4066Sahrens b = tbl->zt_blks_copied; 175ea8dc4b6Seschrock err = dmu_buf_hold(zap->zap_objset, zap->zap_object, 176ea8dc4b6Seschrock (tbl->zt_blk + b) << bs, FTAG, &db_old); 177ea8dc4b6Seschrock if (err) 17866328dd3Sahrens return (err); 179fa9e4066Sahrens 180fa9e4066Sahrens /* first half of entries in old[b] go to new[2*b+0] */ 181ea8dc4b6Seschrock VERIFY(0 == dmu_buf_hold(zap->zap_objset, zap->zap_object, 182ea8dc4b6Seschrock (newblk + 2*b+0) << bs, FTAG, &db_new)); 183fa9e4066Sahrens dmu_buf_will_dirty(db_new, tx); 184fa9e4066Sahrens transfer_func(db_old->db_data, db_new->db_data, hepb); 185ea8dc4b6Seschrock dmu_buf_rele(db_new, FTAG); 186fa9e4066Sahrens 187fa9e4066Sahrens /* second half of entries in old[b] go to new[2*b+1] */ 188ea8dc4b6Seschrock VERIFY(0 == dmu_buf_hold(zap->zap_objset, zap->zap_object, 189ea8dc4b6Seschrock (newblk + 2*b+1) << bs, FTAG, &db_new)); 190fa9e4066Sahrens dmu_buf_will_dirty(db_new, tx); 191fa9e4066Sahrens transfer_func((uint64_t *)db_old->db_data + hepb, 192fa9e4066Sahrens db_new->db_data, hepb); 193ea8dc4b6Seschrock dmu_buf_rele(db_new, FTAG); 194fa9e4066Sahrens 195ea8dc4b6Seschrock dmu_buf_rele(db_old, FTAG); 196fa9e4066Sahrens 197fa9e4066Sahrens tbl->zt_blks_copied++; 198fa9e4066Sahrens 199fa9e4066Sahrens dprintf("copied block %llu of %llu\n", 200fa9e4066Sahrens tbl->zt_blks_copied, tbl->zt_numblks); 201fa9e4066Sahrens 202fa9e4066Sahrens if (tbl->zt_blks_copied == tbl->zt_numblks) { 203ea8dc4b6Seschrock (void) dmu_free_range(zap->zap_objset, zap->zap_object, 204f65e61c0Sahrens tbl->zt_blk << bs, tbl->zt_numblks << bs, tx); 205fa9e4066Sahrens 206fa9e4066Sahrens tbl->zt_blk = newblk; 207fa9e4066Sahrens tbl->zt_numblks *= 2; 208fa9e4066Sahrens tbl->zt_shift++; 209fa9e4066Sahrens tbl->zt_nextblk = 0; 210fa9e4066Sahrens tbl->zt_blks_copied = 0; 211fa9e4066Sahrens 212fa9e4066Sahrens dprintf("finished; numblocks now %llu (%lluk entries)\n", 213fa9e4066Sahrens tbl->zt_numblks, 1<<(tbl->zt_shift-10)); 214fa9e4066Sahrens } 21566328dd3Sahrens 21666328dd3Sahrens return (0); 217fa9e4066Sahrens } 218fa9e4066Sahrens 219ea8dc4b6Seschrock static int 220fa9e4066Sahrens zap_table_store(zap_t *zap, zap_table_phys_t *tbl, uint64_t idx, uint64_t val, 221fa9e4066Sahrens dmu_tx_t *tx) 222fa9e4066Sahrens { 223ea8dc4b6Seschrock int err; 224ea8dc4b6Seschrock uint64_t blk, off; 225f65e61c0Sahrens int bs = FZAP_BLOCK_SHIFT(zap); 226ea8dc4b6Seschrock dmu_buf_t *db; 227fa9e4066Sahrens 228fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 229fa9e4066Sahrens ASSERT(tbl->zt_blk != 0); 230fa9e4066Sahrens 231fa9e4066Sahrens dprintf("storing %llx at index %llx\n", val, idx); 232fa9e4066Sahrens 233f65e61c0Sahrens blk = idx >> (bs-3); 234f65e61c0Sahrens off = idx & ((1<<(bs-3))-1); 235fa9e4066Sahrens 236ea8dc4b6Seschrock err = dmu_buf_hold(zap->zap_objset, zap->zap_object, 237ea8dc4b6Seschrock (tbl->zt_blk + blk) << bs, FTAG, &db); 238ea8dc4b6Seschrock if (err) 239ea8dc4b6Seschrock return (err); 240fa9e4066Sahrens dmu_buf_will_dirty(db, tx); 241fa9e4066Sahrens 242fa9e4066Sahrens if (tbl->zt_nextblk != 0) { 243ea8dc4b6Seschrock uint64_t idx2 = idx * 2; 244ea8dc4b6Seschrock uint64_t blk2 = idx2 >> (bs-3); 245ea8dc4b6Seschrock uint64_t off2 = idx2 & ((1<<(bs-3))-1); 246ea8dc4b6Seschrock dmu_buf_t *db2; 247ea8dc4b6Seschrock 248ea8dc4b6Seschrock err = dmu_buf_hold(zap->zap_objset, zap->zap_object, 249ea8dc4b6Seschrock (tbl->zt_nextblk + blk2) << bs, FTAG, &db2); 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, 280ea8dc4b6Seschrock (tbl->zt_blk + blk) << bs, FTAG, &db); 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, 295ea8dc4b6Seschrock (tbl->zt_nextblk + blk) << bs, FTAG, &db); 296ea8dc4b6Seschrock dmu_buf_rele(db, FTAG); 297ea8dc4b6Seschrock } 298ea8dc4b6Seschrock return (err); 299fa9e4066Sahrens } 300fa9e4066Sahrens 301fa9e4066Sahrens /* 302fa9e4066Sahrens * Routines for growing the ptrtbl. 303fa9e4066Sahrens */ 304fa9e4066Sahrens 305fa9e4066Sahrens static void 306fa9e4066Sahrens zap_ptrtbl_transfer(const uint64_t *src, uint64_t *dst, int n) 307fa9e4066Sahrens { 308fa9e4066Sahrens int i; 309fa9e4066Sahrens for (i = 0; i < n; i++) { 310fa9e4066Sahrens uint64_t lb = src[i]; 311fa9e4066Sahrens dst[2*i+0] = lb; 312fa9e4066Sahrens dst[2*i+1] = lb; 313fa9e4066Sahrens } 314fa9e4066Sahrens } 315fa9e4066Sahrens 31666328dd3Sahrens static int 317fa9e4066Sahrens zap_grow_ptrtbl(zap_t *zap, dmu_tx_t *tx) 318fa9e4066Sahrens { 319*b24ab676SJeff Bonwick /* 320*b24ab676SJeff Bonwick * The pointer table should never use more hash bits than we 321*b24ab676SJeff Bonwick * have (otherwise we'd be using useless zero bits to index it). 322*b24ab676SJeff Bonwick * If we are within 2 bits of running out, stop growing, since 323*b24ab676SJeff Bonwick * this is already an aberrant condition. 324*b24ab676SJeff Bonwick */ 325*b24ab676SJeff Bonwick if (zap->zap_f.zap_phys->zap_ptrtbl.zt_shift >= zap_hashbits(zap) - 2) 32666328dd3Sahrens return (ENOSPC); 327fa9e4066Sahrens 328fa9e4066Sahrens if (zap->zap_f.zap_phys->zap_ptrtbl.zt_numblks == 0) { 329fa9e4066Sahrens /* 330f65e61c0Sahrens * We are outgrowing the "embedded" ptrtbl (the one 331f65e61c0Sahrens * stored in the header block). Give it its own entire 332f65e61c0Sahrens * block, which will double the size of the ptrtbl. 333fa9e4066Sahrens */ 334fa9e4066Sahrens uint64_t newblk; 335fa9e4066Sahrens dmu_buf_t *db_new; 336ea8dc4b6Seschrock int err; 337fa9e4066Sahrens 338fa9e4066Sahrens ASSERT3U(zap->zap_f.zap_phys->zap_ptrtbl.zt_shift, ==, 339f65e61c0Sahrens ZAP_EMBEDDED_PTRTBL_SHIFT(zap)); 340fa9e4066Sahrens ASSERT3U(zap->zap_f.zap_phys->zap_ptrtbl.zt_blk, ==, 0); 341fa9e4066Sahrens 34266328dd3Sahrens newblk = zap_allocate_blocks(zap, 1); 343ea8dc4b6Seschrock err = dmu_buf_hold(zap->zap_objset, zap->zap_object, 344ea8dc4b6Seschrock newblk << FZAP_BLOCK_SHIFT(zap), FTAG, &db_new); 345ea8dc4b6Seschrock if (err) 34666328dd3Sahrens return (err); 347fa9e4066Sahrens dmu_buf_will_dirty(db_new, tx); 348f65e61c0Sahrens zap_ptrtbl_transfer(&ZAP_EMBEDDED_PTRTBL_ENT(zap, 0), 349f65e61c0Sahrens db_new->db_data, 1 << ZAP_EMBEDDED_PTRTBL_SHIFT(zap)); 350ea8dc4b6Seschrock dmu_buf_rele(db_new, FTAG); 351fa9e4066Sahrens 352fa9e4066Sahrens zap->zap_f.zap_phys->zap_ptrtbl.zt_blk = newblk; 353fa9e4066Sahrens zap->zap_f.zap_phys->zap_ptrtbl.zt_numblks = 1; 354fa9e4066Sahrens zap->zap_f.zap_phys->zap_ptrtbl.zt_shift++; 355fa9e4066Sahrens 356fa9e4066Sahrens ASSERT3U(1ULL << zap->zap_f.zap_phys->zap_ptrtbl.zt_shift, ==, 357fa9e4066Sahrens zap->zap_f.zap_phys->zap_ptrtbl.zt_numblks << 358f65e61c0Sahrens (FZAP_BLOCK_SHIFT(zap)-3)); 35966328dd3Sahrens 36066328dd3Sahrens return (0); 361fa9e4066Sahrens } else { 36266328dd3Sahrens return (zap_table_grow(zap, &zap->zap_f.zap_phys->zap_ptrtbl, 36366328dd3Sahrens zap_ptrtbl_transfer, tx)); 364fa9e4066Sahrens } 365fa9e4066Sahrens } 366fa9e4066Sahrens 367fa9e4066Sahrens static void 368fa9e4066Sahrens zap_increment_num_entries(zap_t *zap, int delta, dmu_tx_t *tx) 369fa9e4066Sahrens { 370fa9e4066Sahrens dmu_buf_will_dirty(zap->zap_dbuf, tx); 371fa9e4066Sahrens mutex_enter(&zap->zap_f.zap_num_entries_mtx); 372fa9e4066Sahrens ASSERT(delta > 0 || zap->zap_f.zap_phys->zap_num_entries >= -delta); 373fa9e4066Sahrens zap->zap_f.zap_phys->zap_num_entries += delta; 374fa9e4066Sahrens mutex_exit(&zap->zap_f.zap_num_entries_mtx); 375fa9e4066Sahrens } 376fa9e4066Sahrens 37766328dd3Sahrens static uint64_t 37866328dd3Sahrens zap_allocate_blocks(zap_t *zap, int nblocks) 379fa9e4066Sahrens { 380fa9e4066Sahrens uint64_t newblk; 38166328dd3Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 38266328dd3Sahrens newblk = zap->zap_f.zap_phys->zap_freeblk; 38366328dd3Sahrens zap->zap_f.zap_phys->zap_freeblk += nblocks; 384fa9e4066Sahrens return (newblk); 385fa9e4066Sahrens } 386fa9e4066Sahrens 38766328dd3Sahrens static zap_leaf_t * 388fa9e4066Sahrens zap_create_leaf(zap_t *zap, dmu_tx_t *tx) 389fa9e4066Sahrens { 390fa9e4066Sahrens void *winner; 391fa9e4066Sahrens zap_leaf_t *l = kmem_alloc(sizeof (zap_leaf_t), KM_SLEEP); 392fa9e4066Sahrens 393fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 394fa9e4066Sahrens 395fa9e4066Sahrens rw_init(&l->l_rwlock, 0, 0, 0); 396fa9e4066Sahrens rw_enter(&l->l_rwlock, RW_WRITER); 39766328dd3Sahrens l->l_blkid = zap_allocate_blocks(zap, 1); 398fa9e4066Sahrens l->l_dbuf = NULL; 399fa9e4066Sahrens l->l_phys = NULL; 400fa9e4066Sahrens 401ea8dc4b6Seschrock VERIFY(0 == dmu_buf_hold(zap->zap_objset, zap->zap_object, 402ea8dc4b6Seschrock l->l_blkid << FZAP_BLOCK_SHIFT(zap), NULL, &l->l_dbuf)); 403fa9e4066Sahrens winner = dmu_buf_set_user(l->l_dbuf, l, &l->l_phys, zap_leaf_pageout); 404fa9e4066Sahrens ASSERT(winner == NULL); 405fa9e4066Sahrens dmu_buf_will_dirty(l->l_dbuf, tx); 406fa9e4066Sahrens 407de8267e0Stimh zap_leaf_init(l, zap->zap_normflags != 0); 408fa9e4066Sahrens 40966328dd3Sahrens zap->zap_f.zap_phys->zap_num_leafs++; 410fa9e4066Sahrens 41166328dd3Sahrens return (l); 412fa9e4066Sahrens } 413fa9e4066Sahrens 414fa9e4066Sahrens int 415fa9e4066Sahrens fzap_count(zap_t *zap, uint64_t *count) 416fa9e4066Sahrens { 417fa9e4066Sahrens ASSERT(!zap->zap_ismicro); 418fa9e4066Sahrens mutex_enter(&zap->zap_f.zap_num_entries_mtx); /* unnecessary */ 419fa9e4066Sahrens *count = zap->zap_f.zap_phys->zap_num_entries; 420fa9e4066Sahrens mutex_exit(&zap->zap_f.zap_num_entries_mtx); 421fa9e4066Sahrens return (0); 422fa9e4066Sahrens } 423fa9e4066Sahrens 424fa9e4066Sahrens /* 425fa9e4066Sahrens * Routines for obtaining zap_leaf_t's 426fa9e4066Sahrens */ 427fa9e4066Sahrens 42887e5029aSahrens void 429fa9e4066Sahrens zap_put_leaf(zap_leaf_t *l) 430fa9e4066Sahrens { 431fa9e4066Sahrens rw_exit(&l->l_rwlock); 432ea8dc4b6Seschrock dmu_buf_rele(l->l_dbuf, NULL); 433fa9e4066Sahrens } 434fa9e4066Sahrens 435fa9e4066Sahrens _NOTE(ARGSUSED(0)) 436fa9e4066Sahrens static void 437fa9e4066Sahrens zap_leaf_pageout(dmu_buf_t *db, void *vl) 438fa9e4066Sahrens { 439fa9e4066Sahrens zap_leaf_t *l = vl; 440fa9e4066Sahrens 441fa9e4066Sahrens rw_destroy(&l->l_rwlock); 442fa9e4066Sahrens kmem_free(l, sizeof (zap_leaf_t)); 443fa9e4066Sahrens } 444fa9e4066Sahrens 445fa9e4066Sahrens static zap_leaf_t * 446fa9e4066Sahrens zap_open_leaf(uint64_t blkid, dmu_buf_t *db) 447fa9e4066Sahrens { 448fa9e4066Sahrens zap_leaf_t *l, *winner; 449fa9e4066Sahrens 450fa9e4066Sahrens ASSERT(blkid != 0); 451fa9e4066Sahrens 452fa9e4066Sahrens l = kmem_alloc(sizeof (zap_leaf_t), KM_SLEEP); 453fa9e4066Sahrens rw_init(&l->l_rwlock, 0, 0, 0); 454fa9e4066Sahrens rw_enter(&l->l_rwlock, RW_WRITER); 455fa9e4066Sahrens l->l_blkid = blkid; 456f65e61c0Sahrens l->l_bs = highbit(db->db_size)-1; 457fa9e4066Sahrens l->l_dbuf = db; 458fa9e4066Sahrens l->l_phys = NULL; 459fa9e4066Sahrens 460fa9e4066Sahrens winner = dmu_buf_set_user(db, l, &l->l_phys, zap_leaf_pageout); 461fa9e4066Sahrens 462fa9e4066Sahrens rw_exit(&l->l_rwlock); 463fa9e4066Sahrens if (winner != NULL) { 464fa9e4066Sahrens /* someone else set it first */ 465fa9e4066Sahrens zap_leaf_pageout(NULL, l); 466fa9e4066Sahrens l = winner; 467fa9e4066Sahrens } 468fa9e4066Sahrens 46966328dd3Sahrens /* 47066328dd3Sahrens * lhr_pad was previously used for the next leaf in the leaf 47166328dd3Sahrens * chain. There should be no chained leafs (as we have removed 47266328dd3Sahrens * support for them). 47366328dd3Sahrens */ 47466328dd3Sahrens ASSERT3U(l->l_phys->l_hdr.lh_pad1, ==, 0); 47566328dd3Sahrens 476f65e61c0Sahrens /* 477f65e61c0Sahrens * There should be more hash entries than there can be 478f65e61c0Sahrens * chunks to put in the hash table 479f65e61c0Sahrens */ 480f65e61c0Sahrens ASSERT3U(ZAP_LEAF_HASH_NUMENTRIES(l), >, ZAP_LEAF_NUMCHUNKS(l) / 3); 481f65e61c0Sahrens 482f65e61c0Sahrens /* The chunks should begin at the end of the hash table */ 483f65e61c0Sahrens ASSERT3P(&ZAP_LEAF_CHUNK(l, 0), ==, 484f65e61c0Sahrens &l->l_phys->l_hash[ZAP_LEAF_HASH_NUMENTRIES(l)]); 485f65e61c0Sahrens 486f65e61c0Sahrens /* The chunks should end at the end of the block */ 487f65e61c0Sahrens ASSERT3U((uintptr_t)&ZAP_LEAF_CHUNK(l, ZAP_LEAF_NUMCHUNKS(l)) - 488f65e61c0Sahrens (uintptr_t)l->l_phys, ==, l->l_dbuf->db_size); 489f65e61c0Sahrens 490fa9e4066Sahrens return (l); 491fa9e4066Sahrens } 492fa9e4066Sahrens 493ea8dc4b6Seschrock static int 49466328dd3Sahrens zap_get_leaf_byblk(zap_t *zap, uint64_t blkid, dmu_tx_t *tx, krw_t lt, 495ea8dc4b6Seschrock zap_leaf_t **lp) 496fa9e4066Sahrens { 497fa9e4066Sahrens dmu_buf_t *db; 498fa9e4066Sahrens zap_leaf_t *l; 499f65e61c0Sahrens int bs = FZAP_BLOCK_SHIFT(zap); 500ea8dc4b6Seschrock int err; 501fa9e4066Sahrens 502fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 503fa9e4066Sahrens 504ea8dc4b6Seschrock err = dmu_buf_hold(zap->zap_objset, zap->zap_object, 505ea8dc4b6Seschrock blkid << bs, NULL, &db); 506ea8dc4b6Seschrock if (err) 507ea8dc4b6Seschrock return (err); 508fa9e4066Sahrens 509fa9e4066Sahrens ASSERT3U(db->db_object, ==, zap->zap_object); 510f65e61c0Sahrens ASSERT3U(db->db_offset, ==, blkid << bs); 511f65e61c0Sahrens ASSERT3U(db->db_size, ==, 1 << bs); 512fa9e4066Sahrens ASSERT(blkid != 0); 513fa9e4066Sahrens 514fa9e4066Sahrens l = dmu_buf_get_user(db); 515fa9e4066Sahrens 516fa9e4066Sahrens if (l == NULL) 517fa9e4066Sahrens l = zap_open_leaf(blkid, db); 518fa9e4066Sahrens 519fa9e4066Sahrens rw_enter(&l->l_rwlock, lt); 520fa9e4066Sahrens /* 521fa9e4066Sahrens * Must lock before dirtying, otherwise l->l_phys could change, 522fa9e4066Sahrens * causing ASSERT below to fail. 523fa9e4066Sahrens */ 524fa9e4066Sahrens if (lt == RW_WRITER) 525fa9e4066Sahrens dmu_buf_will_dirty(db, tx); 526fa9e4066Sahrens ASSERT3U(l->l_blkid, ==, blkid); 527fa9e4066Sahrens ASSERT3P(l->l_dbuf, ==, db); 528fa9e4066Sahrens ASSERT3P(l->l_phys, ==, l->l_dbuf->db_data); 52966328dd3Sahrens ASSERT3U(l->l_phys->l_hdr.lh_block_type, ==, ZBT_LEAF); 53066328dd3Sahrens ASSERT3U(l->l_phys->l_hdr.lh_magic, ==, ZAP_LEAF_MAGIC); 531fa9e4066Sahrens 532ea8dc4b6Seschrock *lp = l; 533ea8dc4b6Seschrock return (0); 534fa9e4066Sahrens } 535fa9e4066Sahrens 536ea8dc4b6Seschrock static int 537ea8dc4b6Seschrock zap_idx_to_blk(zap_t *zap, uint64_t idx, uint64_t *valp) 538fa9e4066Sahrens { 539fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 540fa9e4066Sahrens 541fa9e4066Sahrens if (zap->zap_f.zap_phys->zap_ptrtbl.zt_numblks == 0) { 542fa9e4066Sahrens ASSERT3U(idx, <, 543fa9e4066Sahrens (1ULL << zap->zap_f.zap_phys->zap_ptrtbl.zt_shift)); 544ea8dc4b6Seschrock *valp = ZAP_EMBEDDED_PTRTBL_ENT(zap, idx); 545ea8dc4b6Seschrock return (0); 546fa9e4066Sahrens } else { 547fa9e4066Sahrens return (zap_table_load(zap, &zap->zap_f.zap_phys->zap_ptrtbl, 548ea8dc4b6Seschrock idx, valp)); 549fa9e4066Sahrens } 550fa9e4066Sahrens } 551fa9e4066Sahrens 552ea8dc4b6Seschrock static int 553fa9e4066Sahrens zap_set_idx_to_blk(zap_t *zap, uint64_t idx, uint64_t blk, dmu_tx_t *tx) 554fa9e4066Sahrens { 555fa9e4066Sahrens ASSERT(tx != NULL); 556fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 557fa9e4066Sahrens 558fa9e4066Sahrens if (zap->zap_f.zap_phys->zap_ptrtbl.zt_blk == 0) { 559f65e61c0Sahrens ZAP_EMBEDDED_PTRTBL_ENT(zap, idx) = blk; 560ea8dc4b6Seschrock return (0); 561fa9e4066Sahrens } else { 562ea8dc4b6Seschrock return (zap_table_store(zap, &zap->zap_f.zap_phys->zap_ptrtbl, 563ea8dc4b6Seschrock idx, blk, tx)); 564fa9e4066Sahrens } 565fa9e4066Sahrens } 566fa9e4066Sahrens 567ea8dc4b6Seschrock static int 568ea8dc4b6Seschrock zap_deref_leaf(zap_t *zap, uint64_t h, dmu_tx_t *tx, krw_t lt, zap_leaf_t **lp) 569fa9e4066Sahrens { 570ea8dc4b6Seschrock uint64_t idx, blk; 571ea8dc4b6Seschrock int err; 572fa9e4066Sahrens 573fa9e4066Sahrens ASSERT(zap->zap_dbuf == NULL || 574fa9e4066Sahrens zap->zap_f.zap_phys == zap->zap_dbuf->db_data); 575fa9e4066Sahrens ASSERT3U(zap->zap_f.zap_phys->zap_magic, ==, ZAP_MAGIC); 576fa9e4066Sahrens idx = ZAP_HASH_IDX(h, zap->zap_f.zap_phys->zap_ptrtbl.zt_shift); 577ea8dc4b6Seschrock err = zap_idx_to_blk(zap, idx, &blk); 578ea8dc4b6Seschrock if (err != 0) 579ea8dc4b6Seschrock return (err); 580ea8dc4b6Seschrock err = zap_get_leaf_byblk(zap, blk, tx, lt, lp); 581fa9e4066Sahrens 58266328dd3Sahrens ASSERT(err || ZAP_HASH_IDX(h, (*lp)->l_phys->l_hdr.lh_prefix_len) == 58366328dd3Sahrens (*lp)->l_phys->l_hdr.lh_prefix); 584ea8dc4b6Seschrock return (err); 585fa9e4066Sahrens } 586fa9e4066Sahrens 587ea8dc4b6Seschrock static int 588ad860c82Sbonwick zap_expand_leaf(zap_name_t *zn, zap_leaf_t *l, dmu_tx_t *tx, zap_leaf_t **lp) 589fa9e4066Sahrens { 590ad860c82Sbonwick zap_t *zap = zn->zn_zap; 591ad860c82Sbonwick uint64_t hash = zn->zn_hash; 592fa9e4066Sahrens zap_leaf_t *nl; 593fa9e4066Sahrens int prefix_diff, i, err; 594fa9e4066Sahrens uint64_t sibling; 59566328dd3Sahrens int old_prefix_len = l->l_phys->l_hdr.lh_prefix_len; 596fa9e4066Sahrens 59766328dd3Sahrens ASSERT3U(old_prefix_len, <=, zap->zap_f.zap_phys->zap_ptrtbl.zt_shift); 598fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 599fa9e4066Sahrens 60066328dd3Sahrens ASSERT3U(ZAP_HASH_IDX(hash, old_prefix_len), ==, 60166328dd3Sahrens l->l_phys->l_hdr.lh_prefix); 602fa9e4066Sahrens 60366328dd3Sahrens if (zap_tryupgradedir(zap, tx) == 0 || 60466328dd3Sahrens old_prefix_len == zap->zap_f.zap_phys->zap_ptrtbl.zt_shift) { 60566328dd3Sahrens /* We failed to upgrade, or need to grow the pointer table */ 606fa9e4066Sahrens objset_t *os = zap->zap_objset; 607fa9e4066Sahrens uint64_t object = zap->zap_object; 608fa9e4066Sahrens 609fa9e4066Sahrens zap_put_leaf(l); 610fa9e4066Sahrens zap_unlockdir(zap); 611c5f9e431Sahrens err = zap_lockdir(os, object, tx, RW_WRITER, 612ad860c82Sbonwick FALSE, FALSE, &zn->zn_zap); 613ad860c82Sbonwick zap = zn->zn_zap; 61466328dd3Sahrens if (err) 61566328dd3Sahrens return (err); 616fa9e4066Sahrens ASSERT(!zap->zap_ismicro); 617fa9e4066Sahrens 61866328dd3Sahrens while (old_prefix_len == 61966328dd3Sahrens zap->zap_f.zap_phys->zap_ptrtbl.zt_shift) { 62066328dd3Sahrens err = zap_grow_ptrtbl(zap, tx); 62166328dd3Sahrens if (err) 62266328dd3Sahrens return (err); 62366328dd3Sahrens } 62466328dd3Sahrens 62566328dd3Sahrens err = zap_deref_leaf(zap, hash, tx, RW_WRITER, &l); 62666328dd3Sahrens if (err) 62766328dd3Sahrens return (err); 62866328dd3Sahrens 62966328dd3Sahrens if (l->l_phys->l_hdr.lh_prefix_len != old_prefix_len) { 630fa9e4066Sahrens /* it split while our locks were down */ 631ea8dc4b6Seschrock *lp = l; 632ea8dc4b6Seschrock return (0); 633ea8dc4b6Seschrock } 634fa9e4066Sahrens } 635fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); 63666328dd3Sahrens ASSERT3U(old_prefix_len, <, zap->zap_f.zap_phys->zap_ptrtbl.zt_shift); 63766328dd3Sahrens ASSERT3U(ZAP_HASH_IDX(hash, old_prefix_len), ==, 63866328dd3Sahrens l->l_phys->l_hdr.lh_prefix); 639fa9e4066Sahrens 64066328dd3Sahrens prefix_diff = zap->zap_f.zap_phys->zap_ptrtbl.zt_shift - 64166328dd3Sahrens (old_prefix_len + 1); 64266328dd3Sahrens sibling = (ZAP_HASH_IDX(hash, old_prefix_len + 1) | 1) << prefix_diff; 643ea8dc4b6Seschrock 644ea8dc4b6Seschrock /* check for i/o errors before doing zap_leaf_split */ 645fa9e4066Sahrens for (i = 0; i < (1ULL<<prefix_diff); i++) { 646ea8dc4b6Seschrock uint64_t blk; 647ea8dc4b6Seschrock err = zap_idx_to_blk(zap, sibling+i, &blk); 648ea8dc4b6Seschrock if (err) 649ea8dc4b6Seschrock return (err); 650ea8dc4b6Seschrock ASSERT3U(blk, ==, l->l_blkid); 651ea8dc4b6Seschrock } 652ea8dc4b6Seschrock 65366328dd3Sahrens nl = zap_create_leaf(zap, tx); 654de8267e0Stimh zap_leaf_split(l, nl, zap->zap_normflags != 0); 655ea8dc4b6Seschrock 65666328dd3Sahrens /* set sibling pointers */ 657ea8dc4b6Seschrock for (i = 0; i < (1ULL<<prefix_diff); i++) { 658ea8dc4b6Seschrock err = zap_set_idx_to_blk(zap, sibling+i, nl->l_blkid, tx); 659ea8dc4b6Seschrock ASSERT3U(err, ==, 0); /* we checked for i/o errors above */ 660fa9e4066Sahrens } 661fa9e4066Sahrens 66266328dd3Sahrens if (hash & (1ULL << (64 - l->l_phys->l_hdr.lh_prefix_len))) { 663fa9e4066Sahrens /* we want the sibling */ 664fa9e4066Sahrens zap_put_leaf(l); 66566328dd3Sahrens *lp = nl; 666fa9e4066Sahrens } else { 667fa9e4066Sahrens zap_put_leaf(nl); 66866328dd3Sahrens *lp = l; 669fa9e4066Sahrens } 670fa9e4066Sahrens 671ea8dc4b6Seschrock return (0); 672fa9e4066Sahrens } 673fa9e4066Sahrens 674fa9e4066Sahrens static void 675ad860c82Sbonwick zap_put_leaf_maybe_grow_ptrtbl(zap_name_t *zn, zap_leaf_t *l, dmu_tx_t *tx) 676fa9e4066Sahrens { 677ad860c82Sbonwick zap_t *zap = zn->zn_zap; 67866328dd3Sahrens int shift = zap->zap_f.zap_phys->zap_ptrtbl.zt_shift; 67966328dd3Sahrens int leaffull = (l->l_phys->l_hdr.lh_prefix_len == shift && 68066328dd3Sahrens l->l_phys->l_hdr.lh_nfree < ZAP_LEAF_LOW_WATER); 681fa9e4066Sahrens 68266328dd3Sahrens zap_put_leaf(l); 683fa9e4066Sahrens 68466328dd3Sahrens if (leaffull || zap->zap_f.zap_phys->zap_ptrtbl.zt_nextblk) { 68566328dd3Sahrens int err; 686fa9e4066Sahrens 68766328dd3Sahrens /* 68866328dd3Sahrens * We are in the middle of growing the pointer table, or 68966328dd3Sahrens * this leaf will soon make us grow it. 69066328dd3Sahrens */ 691fa9e4066Sahrens if (zap_tryupgradedir(zap, tx) == 0) { 692fa9e4066Sahrens objset_t *os = zap->zap_objset; 693fa9e4066Sahrens uint64_t zapobj = zap->zap_object; 694fa9e4066Sahrens 695fa9e4066Sahrens zap_unlockdir(zap); 696fa9e4066Sahrens err = zap_lockdir(os, zapobj, tx, 697ad860c82Sbonwick RW_WRITER, FALSE, FALSE, &zn->zn_zap); 698ad860c82Sbonwick zap = zn->zn_zap; 69966328dd3Sahrens if (err) 70066328dd3Sahrens return; 701fa9e4066Sahrens } 702fa9e4066Sahrens 70366328dd3Sahrens /* could have finished growing while our locks were down */ 70466328dd3Sahrens if (zap->zap_f.zap_phys->zap_ptrtbl.zt_shift == shift) 70566328dd3Sahrens (void) zap_grow_ptrtbl(zap, tx); 706fa9e4066Sahrens } 707fa9e4066Sahrens } 708fa9e4066Sahrens 709fa9e4066Sahrens 710fa9e4066Sahrens static int 711*b24ab676SJeff Bonwick fzap_checksize(zap_name_t *zn, uint64_t integer_size, uint64_t num_integers) 712fa9e4066Sahrens { 713*b24ab676SJeff Bonwick if (zn->zn_key_orig_len > ZAP_MAXNAMELEN) 71466328dd3Sahrens return (E2BIG); 71566328dd3Sahrens 716fa9e4066Sahrens /* Only integer sizes supported by C */ 717fa9e4066Sahrens switch (integer_size) { 718fa9e4066Sahrens case 1: 719fa9e4066Sahrens case 2: 720fa9e4066Sahrens case 4: 721fa9e4066Sahrens case 8: 722fa9e4066Sahrens break; 723fa9e4066Sahrens default: 724fa9e4066Sahrens return (EINVAL); 725fa9e4066Sahrens } 726fa9e4066Sahrens 72766328dd3Sahrens if (integer_size * num_integers > ZAP_MAXVALUELEN) 72866328dd3Sahrens return (E2BIG); 729fa9e4066Sahrens 730fa9e4066Sahrens return (0); 731fa9e4066Sahrens } 732fa9e4066Sahrens 733fa9e4066Sahrens /* 734da6c28aaSamw * Routines for manipulating attributes. 735fa9e4066Sahrens */ 736fa9e4066Sahrens int 737da6c28aaSamw fzap_lookup(zap_name_t *zn, 738da6c28aaSamw uint64_t integer_size, uint64_t num_integers, void *buf, 739da6c28aaSamw char *realname, int rn_len, boolean_t *ncp) 740fa9e4066Sahrens { 741fa9e4066Sahrens zap_leaf_t *l; 742fa9e4066Sahrens int err; 743fa9e4066Sahrens zap_entry_handle_t zeh; 744fa9e4066Sahrens 745*b24ab676SJeff Bonwick err = fzap_checksize(zn, integer_size, num_integers); 746fa9e4066Sahrens if (err != 0) 747fa9e4066Sahrens return (err); 748fa9e4066Sahrens 749da6c28aaSamw err = zap_deref_leaf(zn->zn_zap, zn->zn_hash, NULL, RW_READER, &l); 750ea8dc4b6Seschrock if (err != 0) 751ea8dc4b6Seschrock return (err); 752da6c28aaSamw err = zap_leaf_lookup(l, zn, &zeh); 753da6c28aaSamw if (err == 0) { 75466328dd3Sahrens err = zap_entry_read(&zeh, integer_size, num_integers, buf); 755*b24ab676SJeff Bonwick (void) zap_entry_read_name(zn->zn_zap, &zeh, rn_len, realname); 756da6c28aaSamw if (ncp) { 757da6c28aaSamw *ncp = zap_entry_normalization_conflict(&zeh, 758da6c28aaSamw zn, NULL, zn->zn_zap); 759da6c28aaSamw } 760da6c28aaSamw } 76166328dd3Sahrens 762fa9e4066Sahrens zap_put_leaf(l); 763fa9e4066Sahrens return (err); 764fa9e4066Sahrens } 765fa9e4066Sahrens 766fa9e4066Sahrens int 767da6c28aaSamw fzap_add_cd(zap_name_t *zn, 768fa9e4066Sahrens uint64_t integer_size, uint64_t num_integers, 769ea8dc4b6Seschrock const void *val, uint32_t cd, dmu_tx_t *tx) 770fa9e4066Sahrens { 771fa9e4066Sahrens zap_leaf_t *l; 772fa9e4066Sahrens int err; 773fa9e4066Sahrens zap_entry_handle_t zeh; 774da6c28aaSamw zap_t *zap = zn->zn_zap; 775fa9e4066Sahrens 776fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 777fa9e4066Sahrens ASSERT(!zap->zap_ismicro); 778*b24ab676SJeff Bonwick ASSERT(fzap_checksize(zn, integer_size, num_integers) == 0); 779fa9e4066Sahrens 780da6c28aaSamw err = zap_deref_leaf(zap, zn->zn_hash, tx, RW_WRITER, &l); 781ea8dc4b6Seschrock if (err != 0) 782ea8dc4b6Seschrock return (err); 783fa9e4066Sahrens retry: 784da6c28aaSamw err = zap_leaf_lookup(l, zn, &zeh); 785fa9e4066Sahrens if (err == 0) { 786fa9e4066Sahrens err = EEXIST; 787fa9e4066Sahrens goto out; 788fa9e4066Sahrens } 789ea8dc4b6Seschrock if (err != ENOENT) 790ea8dc4b6Seschrock goto out; 791fa9e4066Sahrens 792*b24ab676SJeff Bonwick err = zap_entry_create(l, zn, cd, 793fa9e4066Sahrens integer_size, num_integers, val, &zeh); 794fa9e4066Sahrens 795fa9e4066Sahrens if (err == 0) { 796fa9e4066Sahrens zap_increment_num_entries(zap, 1, tx); 797fa9e4066Sahrens } else if (err == EAGAIN) { 798ad860c82Sbonwick err = zap_expand_leaf(zn, l, tx, &l); 799ad860c82Sbonwick zap = zn->zn_zap; /* zap_expand_leaf() may change zap */ 80066328dd3Sahrens if (err == 0) 80166328dd3Sahrens goto retry; 802fa9e4066Sahrens } 803fa9e4066Sahrens 804fa9e4066Sahrens out: 805ad860c82Sbonwick if (zap != NULL) 806ad860c82Sbonwick zap_put_leaf_maybe_grow_ptrtbl(zn, l, tx); 807fa9e4066Sahrens return (err); 808fa9e4066Sahrens } 809fa9e4066Sahrens 810fa9e4066Sahrens int 811da6c28aaSamw fzap_add(zap_name_t *zn, 812fa9e4066Sahrens uint64_t integer_size, uint64_t num_integers, 813fa9e4066Sahrens const void *val, dmu_tx_t *tx) 814fa9e4066Sahrens { 815*b24ab676SJeff Bonwick int err = fzap_checksize(zn, integer_size, num_integers); 816fa9e4066Sahrens if (err != 0) 817fa9e4066Sahrens return (err); 818fa9e4066Sahrens 819da6c28aaSamw return (fzap_add_cd(zn, integer_size, num_integers, 820*b24ab676SJeff Bonwick val, ZAP_NEED_CD, tx)); 821fa9e4066Sahrens } 822fa9e4066Sahrens 823fa9e4066Sahrens int 824da6c28aaSamw fzap_update(zap_name_t *zn, 825fa9e4066Sahrens int integer_size, uint64_t num_integers, const void *val, dmu_tx_t *tx) 826fa9e4066Sahrens { 827fa9e4066Sahrens zap_leaf_t *l; 828fa9e4066Sahrens int err, create; 829fa9e4066Sahrens zap_entry_handle_t zeh; 830da6c28aaSamw zap_t *zap = zn->zn_zap; 831fa9e4066Sahrens 832fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); 833*b24ab676SJeff Bonwick err = fzap_checksize(zn, integer_size, num_integers); 834fa9e4066Sahrens if (err != 0) 835fa9e4066Sahrens return (err); 836fa9e4066Sahrens 837da6c28aaSamw err = zap_deref_leaf(zap, zn->zn_hash, tx, RW_WRITER, &l); 838ea8dc4b6Seschrock if (err != 0) 839ea8dc4b6Seschrock return (err); 840fa9e4066Sahrens retry: 841da6c28aaSamw err = zap_leaf_lookup(l, zn, &zeh); 842fa9e4066Sahrens create = (err == ENOENT); 843fa9e4066Sahrens ASSERT(err == 0 || err == ENOENT); 844fa9e4066Sahrens 845fa9e4066Sahrens if (create) { 846*b24ab676SJeff Bonwick err = zap_entry_create(l, zn, ZAP_NEED_CD, 847*b24ab676SJeff Bonwick integer_size, num_integers, val, &zeh); 848fa9e4066Sahrens if (err == 0) 849fa9e4066Sahrens zap_increment_num_entries(zap, 1, tx); 850fa9e4066Sahrens } else { 851fa9e4066Sahrens err = zap_entry_update(&zeh, integer_size, num_integers, val); 852fa9e4066Sahrens } 853fa9e4066Sahrens 854fa9e4066Sahrens if (err == EAGAIN) { 855ad860c82Sbonwick err = zap_expand_leaf(zn, l, tx, &l); 856ad860c82Sbonwick zap = zn->zn_zap; /* zap_expand_leaf() may change zap */ 85766328dd3Sahrens if (err == 0) 85866328dd3Sahrens goto retry; 859fa9e4066Sahrens } 860fa9e4066Sahrens 861ad860c82Sbonwick if (zap != NULL) 862ad860c82Sbonwick zap_put_leaf_maybe_grow_ptrtbl(zn, l, tx); 863fa9e4066Sahrens return (err); 864fa9e4066Sahrens } 865fa9e4066Sahrens 866fa9e4066Sahrens int 867da6c28aaSamw fzap_length(zap_name_t *zn, 868fa9e4066Sahrens uint64_t *integer_size, uint64_t *num_integers) 869fa9e4066Sahrens { 870fa9e4066Sahrens zap_leaf_t *l; 871fa9e4066Sahrens int err; 872fa9e4066Sahrens zap_entry_handle_t zeh; 873fa9e4066Sahrens 874da6c28aaSamw err = zap_deref_leaf(zn->zn_zap, zn->zn_hash, NULL, RW_READER, &l); 875ea8dc4b6Seschrock if (err != 0) 876ea8dc4b6Seschrock return (err); 877da6c28aaSamw err = zap_leaf_lookup(l, zn, &zeh); 878fa9e4066Sahrens if (err != 0) 879fa9e4066Sahrens goto out; 880fa9e4066Sahrens 881fa9e4066Sahrens if (integer_size) 882fa9e4066Sahrens *integer_size = zeh.zeh_integer_size; 883fa9e4066Sahrens if (num_integers) 884fa9e4066Sahrens *num_integers = zeh.zeh_num_integers; 885fa9e4066Sahrens out: 886fa9e4066Sahrens zap_put_leaf(l); 887fa9e4066Sahrens return (err); 888fa9e4066Sahrens } 889fa9e4066Sahrens 890fa9e4066Sahrens int 891da6c28aaSamw fzap_remove(zap_name_t *zn, dmu_tx_t *tx) 892fa9e4066Sahrens { 893fa9e4066Sahrens zap_leaf_t *l; 894fa9e4066Sahrens int err; 895fa9e4066Sahrens zap_entry_handle_t zeh; 896fa9e4066Sahrens 897da6c28aaSamw err = zap_deref_leaf(zn->zn_zap, zn->zn_hash, tx, RW_WRITER, &l); 898ea8dc4b6Seschrock if (err != 0) 899ea8dc4b6Seschrock return (err); 900da6c28aaSamw err = zap_leaf_lookup(l, zn, &zeh); 901fa9e4066Sahrens if (err == 0) { 902fa9e4066Sahrens zap_entry_remove(&zeh); 903da6c28aaSamw zap_increment_num_entries(zn->zn_zap, -1, tx); 904fa9e4066Sahrens } 905fa9e4066Sahrens zap_put_leaf(l); 906fa9e4066Sahrens return (err); 907fa9e4066Sahrens } 908fa9e4066Sahrens 909088f3894Sahrens /* 910088f3894Sahrens * Helper functions for consumers. 911088f3894Sahrens */ 912088f3894Sahrens 913fa9e4066Sahrens int 914e7437265Sahrens zap_value_search(objset_t *os, uint64_t zapobj, uint64_t value, uint64_t mask, 915e7437265Sahrens char *name) 916fa9e4066Sahrens { 917fa9e4066Sahrens zap_cursor_t zc; 918fa9e4066Sahrens zap_attribute_t *za; 919fa9e4066Sahrens int err; 920fa9e4066Sahrens 921e7437265Sahrens if (mask == 0) 922e7437265Sahrens mask = -1ULL; 923e7437265Sahrens 924fa9e4066Sahrens za = kmem_alloc(sizeof (zap_attribute_t), KM_SLEEP); 925fa9e4066Sahrens for (zap_cursor_init(&zc, os, zapobj); 926fa9e4066Sahrens (err = zap_cursor_retrieve(&zc, za)) == 0; 927fa9e4066Sahrens zap_cursor_advance(&zc)) { 928e7437265Sahrens if ((za->za_first_integer & mask) == (value & mask)) { 929fa9e4066Sahrens (void) strcpy(name, za->za_name); 930fa9e4066Sahrens break; 931fa9e4066Sahrens } 932fa9e4066Sahrens } 93387e5029aSahrens zap_cursor_fini(&zc); 934fa9e4066Sahrens kmem_free(za, sizeof (zap_attribute_t)); 935fa9e4066Sahrens return (err); 936fa9e4066Sahrens } 937fa9e4066Sahrens 938088f3894Sahrens int 939088f3894Sahrens zap_join(objset_t *os, uint64_t fromobj, uint64_t intoobj, dmu_tx_t *tx) 940088f3894Sahrens { 941088f3894Sahrens zap_cursor_t zc; 942088f3894Sahrens zap_attribute_t za; 943088f3894Sahrens int err; 944088f3894Sahrens 945088f3894Sahrens for (zap_cursor_init(&zc, os, fromobj); 946088f3894Sahrens zap_cursor_retrieve(&zc, &za) == 0; 947088f3894Sahrens (void) zap_cursor_advance(&zc)) { 948088f3894Sahrens if (za.za_integer_length != 8 || za.za_num_integers != 1) 949088f3894Sahrens return (EINVAL); 950088f3894Sahrens err = zap_add(os, intoobj, za.za_name, 951088f3894Sahrens 8, 1, &za.za_first_integer, tx); 952088f3894Sahrens if (err) 953088f3894Sahrens return (err); 954088f3894Sahrens } 955088f3894Sahrens zap_cursor_fini(&zc); 956088f3894Sahrens return (0); 957088f3894Sahrens } 958088f3894Sahrens 959088f3894Sahrens int 960088f3894Sahrens zap_add_int(objset_t *os, uint64_t obj, uint64_t value, dmu_tx_t *tx) 961088f3894Sahrens { 962088f3894Sahrens char name[20]; 963088f3894Sahrens 964088f3894Sahrens (void) snprintf(name, sizeof (name), "%llx", (longlong_t)value); 965088f3894Sahrens return (zap_add(os, obj, name, 8, 1, &value, tx)); 966088f3894Sahrens } 967088f3894Sahrens 968088f3894Sahrens int 969088f3894Sahrens zap_remove_int(objset_t *os, uint64_t obj, uint64_t value, dmu_tx_t *tx) 970088f3894Sahrens { 971088f3894Sahrens char name[20]; 972088f3894Sahrens 973088f3894Sahrens (void) snprintf(name, sizeof (name), "%llx", (longlong_t)value); 974088f3894Sahrens return (zap_remove(os, obj, name, tx)); 975088f3894Sahrens } 976088f3894Sahrens 977088f3894Sahrens int 978088f3894Sahrens zap_lookup_int(objset_t *os, uint64_t obj, uint64_t value) 979088f3894Sahrens { 980088f3894Sahrens char name[20]; 981088f3894Sahrens 982088f3894Sahrens (void) snprintf(name, sizeof (name), "%llx", (longlong_t)value); 983088f3894Sahrens return (zap_lookup(os, obj, name, 8, 1, &value)); 984088f3894Sahrens } 985fa9e4066Sahrens 9869966ca11SMatthew Ahrens int 9879966ca11SMatthew Ahrens zap_increment_int(objset_t *os, uint64_t obj, uint64_t key, int64_t delta, 9889966ca11SMatthew Ahrens dmu_tx_t *tx) 9899966ca11SMatthew Ahrens { 9909966ca11SMatthew Ahrens char name[20]; 9919966ca11SMatthew Ahrens uint64_t value = 0; 9929966ca11SMatthew Ahrens int err; 9939966ca11SMatthew Ahrens 9949966ca11SMatthew Ahrens if (delta == 0) 9959966ca11SMatthew Ahrens return (0); 9969966ca11SMatthew Ahrens 9979966ca11SMatthew Ahrens (void) snprintf(name, sizeof (name), "%llx", (longlong_t)key); 9989966ca11SMatthew Ahrens err = zap_lookup(os, obj, name, 8, 1, &value); 9999966ca11SMatthew Ahrens if (err != 0 && err != ENOENT) 10009966ca11SMatthew Ahrens return (err); 10019966ca11SMatthew Ahrens value += delta; 10029966ca11SMatthew Ahrens if (value == 0) 10039966ca11SMatthew Ahrens err = zap_remove(os, obj, name, tx); 10049966ca11SMatthew Ahrens else 10059966ca11SMatthew Ahrens err = zap_update(os, obj, name, 8, 1, &value, tx); 10069966ca11SMatthew Ahrens return (err); 10079966ca11SMatthew Ahrens } 10089966ca11SMatthew Ahrens 10099966ca11SMatthew Ahrens 1010fa9e4066Sahrens /* 1011fa9e4066Sahrens * Routines for iterating over the attributes. 1012fa9e4066Sahrens */ 1013fa9e4066Sahrens 1014fa9e4066Sahrens int 1015fa9e4066Sahrens fzap_cursor_retrieve(zap_t *zap, zap_cursor_t *zc, zap_attribute_t *za) 1016fa9e4066Sahrens { 1017fa9e4066Sahrens int err = ENOENT; 1018fa9e4066Sahrens zap_entry_handle_t zeh; 1019fa9e4066Sahrens zap_leaf_t *l; 1020fa9e4066Sahrens 1021*b24ab676SJeff Bonwick /* memset(za, 0xba, sizeof (zap_attribute_t)); */ 1022*b24ab676SJeff Bonwick 1023fa9e4066Sahrens /* retrieve the next entry at or after zc_hash/zc_cd */ 1024fa9e4066Sahrens /* if no entry, return ENOENT */ 1025fa9e4066Sahrens 102687e5029aSahrens if (zc->zc_leaf && 102766328dd3Sahrens (ZAP_HASH_IDX(zc->zc_hash, 102866328dd3Sahrens zc->zc_leaf->l_phys->l_hdr.lh_prefix_len) != 102966328dd3Sahrens zc->zc_leaf->l_phys->l_hdr.lh_prefix)) { 103087e5029aSahrens rw_enter(&zc->zc_leaf->l_rwlock, RW_READER); 103187e5029aSahrens zap_put_leaf(zc->zc_leaf); 103287e5029aSahrens zc->zc_leaf = NULL; 103387e5029aSahrens } 103487e5029aSahrens 1035fa9e4066Sahrens again: 103687e5029aSahrens if (zc->zc_leaf == NULL) { 1037ea8dc4b6Seschrock err = zap_deref_leaf(zap, zc->zc_hash, NULL, RW_READER, 1038ea8dc4b6Seschrock &zc->zc_leaf); 1039ea8dc4b6Seschrock if (err != 0) 1040ea8dc4b6Seschrock return (err); 104187e5029aSahrens } else { 104287e5029aSahrens rw_enter(&zc->zc_leaf->l_rwlock, RW_READER); 104387e5029aSahrens } 104487e5029aSahrens l = zc->zc_leaf; 104587e5029aSahrens 1046fa9e4066Sahrens err = zap_leaf_lookup_closest(l, zc->zc_hash, zc->zc_cd, &zeh); 1047fa9e4066Sahrens 1048fa9e4066Sahrens if (err == ENOENT) { 104966328dd3Sahrens uint64_t nocare = 105066328dd3Sahrens (1ULL << (64 - l->l_phys->l_hdr.lh_prefix_len)) - 1; 1051fa9e4066Sahrens zc->zc_hash = (zc->zc_hash & ~nocare) + nocare + 1; 1052fa9e4066Sahrens zc->zc_cd = 0; 105366328dd3Sahrens if (l->l_phys->l_hdr.lh_prefix_len == 0 || zc->zc_hash == 0) { 1054fa9e4066Sahrens zc->zc_hash = -1ULL; 1055fa9e4066Sahrens } else { 105687e5029aSahrens zap_put_leaf(zc->zc_leaf); 105787e5029aSahrens zc->zc_leaf = NULL; 1058fa9e4066Sahrens goto again; 1059fa9e4066Sahrens } 1060fa9e4066Sahrens } 1061fa9e4066Sahrens 1062fa9e4066Sahrens if (err == 0) { 1063fa9e4066Sahrens zc->zc_hash = zeh.zeh_hash; 1064fa9e4066Sahrens zc->zc_cd = zeh.zeh_cd; 1065fa9e4066Sahrens za->za_integer_length = zeh.zeh_integer_size; 1066fa9e4066Sahrens za->za_num_integers = zeh.zeh_num_integers; 1067fa9e4066Sahrens if (zeh.zeh_num_integers == 0) { 1068fa9e4066Sahrens za->za_first_integer = 0; 1069fa9e4066Sahrens } else { 1070fa9e4066Sahrens err = zap_entry_read(&zeh, 8, 1, &za->za_first_integer); 1071fa9e4066Sahrens ASSERT(err == 0 || err == EOVERFLOW); 1072fa9e4066Sahrens } 1073*b24ab676SJeff Bonwick err = zap_entry_read_name(zap, &zeh, 1074fa9e4066Sahrens sizeof (za->za_name), za->za_name); 1075fa9e4066Sahrens ASSERT(err == 0); 1076da6c28aaSamw 1077da6c28aaSamw za->za_normalization_conflict = 1078da6c28aaSamw zap_entry_normalization_conflict(&zeh, 1079da6c28aaSamw NULL, za->za_name, zap); 1080fa9e4066Sahrens } 108187e5029aSahrens rw_exit(&zc->zc_leaf->l_rwlock); 1082fa9e4066Sahrens return (err); 1083fa9e4066Sahrens } 1084fa9e4066Sahrens 1085fa9e4066Sahrens 1086fa9e4066Sahrens static void 1087fa9e4066Sahrens zap_stats_ptrtbl(zap_t *zap, uint64_t *tbl, int len, zap_stats_t *zs) 1088fa9e4066Sahrens { 1089ea8dc4b6Seschrock int i, err; 1090fa9e4066Sahrens uint64_t lastblk = 0; 1091fa9e4066Sahrens 1092fa9e4066Sahrens /* 1093fa9e4066Sahrens * NB: if a leaf has more pointers than an entire ptrtbl block 1094fa9e4066Sahrens * can hold, then it'll be accounted for more than once, since 1095fa9e4066Sahrens * we won't have lastblk. 1096fa9e4066Sahrens */ 1097fa9e4066Sahrens for (i = 0; i < len; i++) { 1098fa9e4066Sahrens zap_leaf_t *l; 1099fa9e4066Sahrens 1100fa9e4066Sahrens if (tbl[i] == lastblk) 1101fa9e4066Sahrens continue; 1102fa9e4066Sahrens lastblk = tbl[i]; 1103fa9e4066Sahrens 1104ea8dc4b6Seschrock err = zap_get_leaf_byblk(zap, tbl[i], NULL, RW_READER, &l); 1105ea8dc4b6Seschrock if (err == 0) { 110666328dd3Sahrens zap_leaf_stats(zap, l, zs); 1107ea8dc4b6Seschrock zap_put_leaf(l); 1108ea8dc4b6Seschrock } 1109fa9e4066Sahrens } 1110fa9e4066Sahrens } 1111fa9e4066Sahrens 1112d20e665cSRicardo M. Correia int 1113d20e665cSRicardo M. Correia fzap_cursor_move_to_key(zap_cursor_t *zc, zap_name_t *zn) 1114d20e665cSRicardo M. Correia { 1115d20e665cSRicardo M. Correia int err; 1116d20e665cSRicardo M. Correia zap_leaf_t *l; 1117d20e665cSRicardo M. Correia zap_entry_handle_t zeh; 1118d20e665cSRicardo M. Correia 1119*b24ab676SJeff Bonwick if (zn->zn_key_orig_len > ZAP_MAXNAMELEN) 1120d20e665cSRicardo M. Correia return (E2BIG); 1121d20e665cSRicardo M. Correia 1122d20e665cSRicardo M. Correia err = zap_deref_leaf(zc->zc_zap, zn->zn_hash, NULL, RW_READER, &l); 1123d20e665cSRicardo M. Correia if (err != 0) 1124d20e665cSRicardo M. Correia return (err); 1125d20e665cSRicardo M. Correia 1126d20e665cSRicardo M. Correia err = zap_leaf_lookup(l, zn, &zeh); 1127d20e665cSRicardo M. Correia if (err != 0) 1128d20e665cSRicardo M. Correia return (err); 1129d20e665cSRicardo M. Correia 1130d20e665cSRicardo M. Correia zc->zc_leaf = l; 1131d20e665cSRicardo M. Correia zc->zc_hash = zeh.zeh_hash; 1132d20e665cSRicardo M. Correia zc->zc_cd = zeh.zeh_cd; 1133d20e665cSRicardo M. Correia 1134d20e665cSRicardo M. Correia return (err); 1135d20e665cSRicardo M. Correia } 1136d20e665cSRicardo M. Correia 1137fa9e4066Sahrens void 1138fa9e4066Sahrens fzap_get_stats(zap_t *zap, zap_stats_t *zs) 1139fa9e4066Sahrens { 1140f65e61c0Sahrens int bs = FZAP_BLOCK_SHIFT(zap); 1141f65e61c0Sahrens zs->zs_blocksize = 1ULL << bs; 11428248818dSnd 11438248818dSnd /* 11448248818dSnd * Set zap_phys_t fields 11458248818dSnd */ 1146fa9e4066Sahrens zs->zs_num_leafs = zap->zap_f.zap_phys->zap_num_leafs; 1147fa9e4066Sahrens zs->zs_num_entries = zap->zap_f.zap_phys->zap_num_entries; 1148fa9e4066Sahrens zs->zs_num_blocks = zap->zap_f.zap_phys->zap_freeblk; 11498248818dSnd zs->zs_block_type = zap->zap_f.zap_phys->zap_block_type; 11508248818dSnd zs->zs_magic = zap->zap_f.zap_phys->zap_magic; 11518248818dSnd zs->zs_salt = zap->zap_f.zap_phys->zap_salt; 11528248818dSnd 11538248818dSnd /* 11548248818dSnd * Set zap_ptrtbl fields 11558248818dSnd */ 11568248818dSnd zs->zs_ptrtbl_len = 1ULL << zap->zap_f.zap_phys->zap_ptrtbl.zt_shift; 11578248818dSnd zs->zs_ptrtbl_nextblk = zap->zap_f.zap_phys->zap_ptrtbl.zt_nextblk; 11588248818dSnd zs->zs_ptrtbl_blks_copied = 11598248818dSnd zap->zap_f.zap_phys->zap_ptrtbl.zt_blks_copied; 11608248818dSnd zs->zs_ptrtbl_zt_blk = zap->zap_f.zap_phys->zap_ptrtbl.zt_blk; 11618248818dSnd zs->zs_ptrtbl_zt_numblks = zap->zap_f.zap_phys->zap_ptrtbl.zt_numblks; 11628248818dSnd zs->zs_ptrtbl_zt_shift = zap->zap_f.zap_phys->zap_ptrtbl.zt_shift; 1163fa9e4066Sahrens 1164fa9e4066Sahrens if (zap->zap_f.zap_phys->zap_ptrtbl.zt_numblks == 0) { 1165fa9e4066Sahrens /* the ptrtbl is entirely in the header block. */ 1166f65e61c0Sahrens zap_stats_ptrtbl(zap, &ZAP_EMBEDDED_PTRTBL_ENT(zap, 0), 1167f65e61c0Sahrens 1 << ZAP_EMBEDDED_PTRTBL_SHIFT(zap), zs); 1168fa9e4066Sahrens } else { 1169fa9e4066Sahrens int b; 1170fa9e4066Sahrens 1171fa9e4066Sahrens dmu_prefetch(zap->zap_objset, zap->zap_object, 1172f65e61c0Sahrens zap->zap_f.zap_phys->zap_ptrtbl.zt_blk << bs, 1173f65e61c0Sahrens zap->zap_f.zap_phys->zap_ptrtbl.zt_numblks << bs); 1174fa9e4066Sahrens 1175fa9e4066Sahrens for (b = 0; b < zap->zap_f.zap_phys->zap_ptrtbl.zt_numblks; 1176fa9e4066Sahrens b++) { 1177fa9e4066Sahrens dmu_buf_t *db; 1178ea8dc4b6Seschrock int err; 1179ea8dc4b6Seschrock 1180ea8dc4b6Seschrock err = dmu_buf_hold(zap->zap_objset, zap->zap_object, 1181ea8dc4b6Seschrock (zap->zap_f.zap_phys->zap_ptrtbl.zt_blk + b) << bs, 1182ea8dc4b6Seschrock FTAG, &db); 1183ea8dc4b6Seschrock if (err == 0) { 1184ea8dc4b6Seschrock zap_stats_ptrtbl(zap, db->db_data, 1185ea8dc4b6Seschrock 1<<(bs-3), zs); 1186ea8dc4b6Seschrock dmu_buf_rele(db, FTAG); 1187ea8dc4b6Seschrock } 1188fa9e4066Sahrens } 1189fa9e4066Sahrens } 1190fa9e4066Sahrens } 11913d692628SSanjeev Bagewadi 11923d692628SSanjeev Bagewadi int 11933d692628SSanjeev Bagewadi fzap_count_write(zap_name_t *zn, int add, uint64_t *towrite, 11943d692628SSanjeev Bagewadi uint64_t *tooverwrite) 11953d692628SSanjeev Bagewadi { 11963d692628SSanjeev Bagewadi zap_t *zap = zn->zn_zap; 11973d692628SSanjeev Bagewadi zap_leaf_t *l; 11983d692628SSanjeev Bagewadi int err; 11993d692628SSanjeev Bagewadi 12003d692628SSanjeev Bagewadi /* 12013d692628SSanjeev Bagewadi * Account for the header block of the fatzap. 12023d692628SSanjeev Bagewadi */ 12033d692628SSanjeev Bagewadi if (!add && dmu_buf_freeable(zap->zap_dbuf)) { 120412a2833aSSanjeev Bagewadi *tooverwrite += zap->zap_dbuf->db_size; 12053d692628SSanjeev Bagewadi } else { 120612a2833aSSanjeev Bagewadi *towrite += zap->zap_dbuf->db_size; 12073d692628SSanjeev Bagewadi } 12083d692628SSanjeev Bagewadi 12093d692628SSanjeev Bagewadi /* 12103d692628SSanjeev Bagewadi * Account for the pointer table blocks. 12113d692628SSanjeev Bagewadi * If we are adding we need to account for the following cases : 12123d692628SSanjeev Bagewadi * - If the pointer table is embedded, this operation could force an 12133d692628SSanjeev Bagewadi * external pointer table. 12143d692628SSanjeev Bagewadi * - If this already has an external pointer table this operation 12153d692628SSanjeev Bagewadi * could extend the table. 12163d692628SSanjeev Bagewadi */ 12173d692628SSanjeev Bagewadi if (add) { 12183d692628SSanjeev Bagewadi if (zap->zap_f.zap_phys->zap_ptrtbl.zt_blk == 0) 121912a2833aSSanjeev Bagewadi *towrite += zap->zap_dbuf->db_size; 12203d692628SSanjeev Bagewadi else 122112a2833aSSanjeev Bagewadi *towrite += (zap->zap_dbuf->db_size * 3); 12223d692628SSanjeev Bagewadi } 12233d692628SSanjeev Bagewadi 12243d692628SSanjeev Bagewadi /* 12253d692628SSanjeev Bagewadi * Now, check if the block containing leaf is freeable 12263d692628SSanjeev Bagewadi * and account accordingly. 12273d692628SSanjeev Bagewadi */ 12283d692628SSanjeev Bagewadi err = zap_deref_leaf(zap, zn->zn_hash, NULL, RW_READER, &l); 12293d692628SSanjeev Bagewadi if (err != 0) { 12303d692628SSanjeev Bagewadi return (err); 12313d692628SSanjeev Bagewadi } 12323d692628SSanjeev Bagewadi 12333d692628SSanjeev Bagewadi if (!add && dmu_buf_freeable(l->l_dbuf)) { 123412a2833aSSanjeev Bagewadi *tooverwrite += l->l_dbuf->db_size; 12353d692628SSanjeev Bagewadi } else { 12363d692628SSanjeev Bagewadi /* 12373d692628SSanjeev Bagewadi * If this an add operation, the leaf block could split. 12383d692628SSanjeev Bagewadi * Hence, we need to account for an additional leaf block. 12393d692628SSanjeev Bagewadi */ 124012a2833aSSanjeev Bagewadi *towrite += (add ? 2 : 1) * l->l_dbuf->db_size; 12413d692628SSanjeev Bagewadi } 12423d692628SSanjeev Bagewadi 12433d692628SSanjeev Bagewadi zap_put_leaf(l); 12443d692628SSanjeev Bagewadi return (0); 12453d692628SSanjeev Bagewadi } 1246