1fa9e4066Sahrens /* 2fa9e4066Sahrens * CDDL HEADER START 3fa9e4066Sahrens * 4fa9e4066Sahrens * The contents of this file are subject to the terms of the 5ea8dc4b6Seschrock * Common Development and Distribution License (the "License"). 6ea8dc4b6Seschrock * You may not use this file except in compliance with the License. 7fa9e4066Sahrens * 8fa9e4066Sahrens * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9fa9e4066Sahrens * or http://www.opensolaris.org/os/licensing. 10fa9e4066Sahrens * See the License for the specific language governing permissions 11fa9e4066Sahrens * and limitations under the License. 12fa9e4066Sahrens * 13fa9e4066Sahrens * When distributing Covered Code, include this CDDL HEADER in each 14fa9e4066Sahrens * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15fa9e4066Sahrens * If applicable, add the following below this CDDL HEADER, with the 16fa9e4066Sahrens * fields enclosed by brackets "[]" replaced with your own identifying 17fa9e4066Sahrens * information: Portions Copyright [yyyy] [name of copyright owner] 18fa9e4066Sahrens * 19fa9e4066Sahrens * CDDL HEADER END 20fa9e4066Sahrens */ 21fa9e4066Sahrens /* 22*cdb0ab79Smaybee * Copyright 2008 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 #include <sys/dmu.h> 29fa9e4066Sahrens #include <sys/dmu_objset.h> 30fa9e4066Sahrens #include <sys/dmu_tx.h> 31fa9e4066Sahrens #include <sys/dnode.h> 32fa9e4066Sahrens 33fa9e4066Sahrens uint64_t 34fa9e4066Sahrens dmu_object_alloc(objset_t *os, dmu_object_type_t ot, int blocksize, 35fa9e4066Sahrens dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) 36fa9e4066Sahrens { 37fa9e4066Sahrens objset_impl_t *osi = os->os; 38fa9e4066Sahrens uint64_t object; 39fa9e4066Sahrens uint64_t L2_dnode_count = DNODES_PER_BLOCK << 40fa9e4066Sahrens (osi->os_meta_dnode->dn_indblkshift - SPA_BLKPTRSHIFT); 41ea8dc4b6Seschrock dnode_t *dn = NULL; 42fa9e4066Sahrens int restarted = B_FALSE; 43fa9e4066Sahrens 44fa9e4066Sahrens mutex_enter(&osi->os_obj_lock); 45fa9e4066Sahrens for (;;) { 46fa9e4066Sahrens object = osi->os_obj_next; 47fa9e4066Sahrens /* 48fa9e4066Sahrens * Each time we polish off an L2 bp worth of dnodes 49fa9e4066Sahrens * (2^13 objects), move to another L2 bp that's still 50fa9e4066Sahrens * reasonably sparse (at most 1/4 full). Look from the 51fa9e4066Sahrens * beginning once, but after that keep looking from here. 52fa9e4066Sahrens * If we can't find one, just keep going from here. 53fa9e4066Sahrens */ 54fa9e4066Sahrens if (P2PHASE(object, L2_dnode_count) == 0) { 55fa9e4066Sahrens uint64_t offset = restarted ? object << DNODE_SHIFT : 0; 56fa9e4066Sahrens int error = dnode_next_offset(osi->os_meta_dnode, 57*cdb0ab79Smaybee DNODE_FIND_HOLE, 58*cdb0ab79Smaybee &offset, 2, DNODES_PER_BLOCK >> 2, 0); 59fa9e4066Sahrens restarted = B_TRUE; 60fa9e4066Sahrens if (error == 0) 61fa9e4066Sahrens object = offset >> DNODE_SHIFT; 62fa9e4066Sahrens } 63fa9e4066Sahrens osi->os_obj_next = ++object; 64fa9e4066Sahrens 65ea8dc4b6Seschrock /* 66ea8dc4b6Seschrock * XXX We should check for an i/o error here and return 67ea8dc4b6Seschrock * up to our caller. Actually we should pre-read it in 68ea8dc4b6Seschrock * dmu_tx_assign(), but there is currently no mechanism 69ea8dc4b6Seschrock * to do so. 70ea8dc4b6Seschrock */ 71ea8dc4b6Seschrock (void) dnode_hold_impl(os->os, object, DNODE_MUST_BE_FREE, 72ea8dc4b6Seschrock FTAG, &dn); 73fa9e4066Sahrens if (dn) 74fa9e4066Sahrens break; 75fa9e4066Sahrens 766754306eSahrens if (dmu_object_next(os, &object, B_TRUE, 0) == 0) 77fa9e4066Sahrens osi->os_obj_next = object - 1; 78fa9e4066Sahrens } 79fa9e4066Sahrens 80fa9e4066Sahrens dnode_allocate(dn, ot, blocksize, 0, bonustype, bonuslen, tx); 81fa9e4066Sahrens dnode_rele(dn, FTAG); 82fa9e4066Sahrens 83fa9e4066Sahrens mutex_exit(&osi->os_obj_lock); 84fa9e4066Sahrens 85fa9e4066Sahrens dmu_tx_add_new_object(tx, os, object); 86fa9e4066Sahrens return (object); 87fa9e4066Sahrens } 88fa9e4066Sahrens 89fa9e4066Sahrens int 90fa9e4066Sahrens dmu_object_claim(objset_t *os, uint64_t object, dmu_object_type_t ot, 91fa9e4066Sahrens int blocksize, dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) 92fa9e4066Sahrens { 93fa9e4066Sahrens dnode_t *dn; 94ea8dc4b6Seschrock int err; 95fa9e4066Sahrens 96ea8dc4b6Seschrock if (object == DMU_META_DNODE_OBJECT && !dmu_tx_private_ok(tx)) 97fa9e4066Sahrens return (EBADF); 98fa9e4066Sahrens 99ea8dc4b6Seschrock err = dnode_hold_impl(os->os, object, DNODE_MUST_BE_FREE, FTAG, &dn); 100ea8dc4b6Seschrock if (err) 101ea8dc4b6Seschrock return (err); 102fa9e4066Sahrens dnode_allocate(dn, ot, blocksize, 0, bonustype, bonuslen, tx); 103fa9e4066Sahrens dnode_rele(dn, FTAG); 104fa9e4066Sahrens 105fa9e4066Sahrens dmu_tx_add_new_object(tx, os, object); 106fa9e4066Sahrens return (0); 107fa9e4066Sahrens } 108fa9e4066Sahrens 109fa9e4066Sahrens int 110fa9e4066Sahrens dmu_object_reclaim(objset_t *os, uint64_t object, dmu_object_type_t ot, 111fa9e4066Sahrens int blocksize, dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) 112fa9e4066Sahrens { 113fa9e4066Sahrens dnode_t *dn; 114ea8dc4b6Seschrock int err; 115fa9e4066Sahrens 116ea8dc4b6Seschrock if (object == DMU_META_DNODE_OBJECT && !dmu_tx_private_ok(tx)) 117fa9e4066Sahrens return (EBADF); 118fa9e4066Sahrens 119ea8dc4b6Seschrock err = dnode_hold_impl(os->os, object, DNODE_MUST_BE_ALLOCATED, 120ea8dc4b6Seschrock FTAG, &dn); 121ea8dc4b6Seschrock if (err) 122ea8dc4b6Seschrock return (err); 123fa9e4066Sahrens dnode_reallocate(dn, ot, blocksize, bonustype, bonuslen, tx); 124fa9e4066Sahrens dnode_rele(dn, FTAG); 125fa9e4066Sahrens 126fa9e4066Sahrens return (0); 127fa9e4066Sahrens } 128fa9e4066Sahrens 129fa9e4066Sahrens int 130fa9e4066Sahrens dmu_object_free(objset_t *os, uint64_t object, dmu_tx_t *tx) 131fa9e4066Sahrens { 132fa9e4066Sahrens dnode_t *dn; 133ea8dc4b6Seschrock int err; 134fa9e4066Sahrens 135ea8dc4b6Seschrock ASSERT(object != DMU_META_DNODE_OBJECT || dmu_tx_private_ok(tx)); 136fa9e4066Sahrens 137ea8dc4b6Seschrock err = dnode_hold_impl(os->os, object, DNODE_MUST_BE_ALLOCATED, 138ea8dc4b6Seschrock FTAG, &dn); 139ea8dc4b6Seschrock if (err) 140ea8dc4b6Seschrock return (err); 141fa9e4066Sahrens 142fa9e4066Sahrens ASSERT(dn->dn_type != DMU_OT_NONE); 143*cdb0ab79Smaybee dnode_free_range(dn, 0, DMU_OBJECT_END, tx); 144fa9e4066Sahrens dnode_free(dn, tx); 145fa9e4066Sahrens dnode_rele(dn, FTAG); 146fa9e4066Sahrens 147fa9e4066Sahrens return (0); 148fa9e4066Sahrens } 149fa9e4066Sahrens 150fa9e4066Sahrens int 1516754306eSahrens dmu_object_next(objset_t *os, uint64_t *objectp, boolean_t hole, uint64_t txg) 152fa9e4066Sahrens { 153fa9e4066Sahrens uint64_t offset = (*objectp + 1) << DNODE_SHIFT; 154fa9e4066Sahrens int error; 155fa9e4066Sahrens 156fa9e4066Sahrens error = dnode_next_offset(os->os->os_meta_dnode, 157*cdb0ab79Smaybee (hole ? DNODE_FIND_HOLE : 0), &offset, 0, DNODES_PER_BLOCK, txg); 158fa9e4066Sahrens 159fa9e4066Sahrens *objectp = offset >> DNODE_SHIFT; 160fa9e4066Sahrens 161fa9e4066Sahrens return (error); 162fa9e4066Sahrens } 163