1168404Spjd/* 2168404Spjd * CDDL HEADER START 3168404Spjd * 4168404Spjd * The contents of this file are subject to the terms of the 5168404Spjd * Common Development and Distribution License (the "License"). 6168404Spjd * You may not use this file except in compliance with the License. 7168404Spjd * 8168404Spjd * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9168404Spjd * or http://www.opensolaris.org/os/licensing. 10168404Spjd * See the License for the specific language governing permissions 11168404Spjd * and limitations under the License. 12168404Spjd * 13168404Spjd * When distributing Covered Code, include this CDDL HEADER in each 14168404Spjd * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15168404Spjd * If applicable, add the following below this CDDL HEADER, with the 16168404Spjd * fields enclosed by brackets "[]" replaced with your own identifying 17168404Spjd * information: Portions Copyright [yyyy] [name of copyright owner] 18168404Spjd * 19168404Spjd * CDDL HEADER END 20168404Spjd */ 21168404Spjd/* 22219089Spjd * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 23249195Smm * Copyright (c) 2013 by Delphix. All rights reserved. 24168404Spjd */ 25168404Spjd 26168404Spjd#include <sys/dmu.h> 27168404Spjd#include <sys/dmu_objset.h> 28168404Spjd#include <sys/dmu_tx.h> 29168404Spjd#include <sys/dnode.h> 30168404Spjd 31168404Spjduint64_t 32168404Spjddmu_object_alloc(objset_t *os, dmu_object_type_t ot, int blocksize, 33168404Spjd dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) 34168404Spjd{ 35168404Spjd uint64_t object; 36168404Spjd uint64_t L2_dnode_count = DNODES_PER_BLOCK << 37219089Spjd (DMU_META_DNODE(os)->dn_indblkshift - SPA_BLKPTRSHIFT); 38168404Spjd dnode_t *dn = NULL; 39168404Spjd int restarted = B_FALSE; 40168404Spjd 41219089Spjd mutex_enter(&os->os_obj_lock); 42168404Spjd for (;;) { 43219089Spjd object = os->os_obj_next; 44168404Spjd /* 45168404Spjd * Each time we polish off an L2 bp worth of dnodes 46168404Spjd * (2^13 objects), move to another L2 bp that's still 47168404Spjd * reasonably sparse (at most 1/4 full). Look from the 48168404Spjd * beginning once, but after that keep looking from here. 49168404Spjd * If we can't find one, just keep going from here. 50168404Spjd */ 51168404Spjd if (P2PHASE(object, L2_dnode_count) == 0) { 52168404Spjd uint64_t offset = restarted ? object << DNODE_SHIFT : 0; 53219089Spjd int error = dnode_next_offset(DMU_META_DNODE(os), 54185029Spjd DNODE_FIND_HOLE, 55185029Spjd &offset, 2, DNODES_PER_BLOCK >> 2, 0); 56168404Spjd restarted = B_TRUE; 57168404Spjd if (error == 0) 58168404Spjd object = offset >> DNODE_SHIFT; 59168404Spjd } 60219089Spjd os->os_obj_next = ++object; 61168404Spjd 62168404Spjd /* 63168404Spjd * XXX We should check for an i/o error here and return 64168404Spjd * up to our caller. Actually we should pre-read it in 65168404Spjd * dmu_tx_assign(), but there is currently no mechanism 66168404Spjd * to do so. 67168404Spjd */ 68219089Spjd (void) dnode_hold_impl(os, object, DNODE_MUST_BE_FREE, 69168404Spjd FTAG, &dn); 70168404Spjd if (dn) 71168404Spjd break; 72168404Spjd 73168404Spjd if (dmu_object_next(os, &object, B_TRUE, 0) == 0) 74219089Spjd os->os_obj_next = object - 1; 75168404Spjd } 76168404Spjd 77168404Spjd dnode_allocate(dn, ot, blocksize, 0, bonustype, bonuslen, tx); 78168404Spjd dnode_rele(dn, FTAG); 79168404Spjd 80219089Spjd mutex_exit(&os->os_obj_lock); 81168404Spjd 82168404Spjd dmu_tx_add_new_object(tx, os, object); 83168404Spjd return (object); 84168404Spjd} 85168404Spjd 86168404Spjdint 87168404Spjddmu_object_claim(objset_t *os, uint64_t object, dmu_object_type_t ot, 88168404Spjd int blocksize, dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) 89168404Spjd{ 90168404Spjd dnode_t *dn; 91168404Spjd int err; 92168404Spjd 93168404Spjd if (object == DMU_META_DNODE_OBJECT && !dmu_tx_private_ok(tx)) 94249195Smm return (SET_ERROR(EBADF)); 95168404Spjd 96219089Spjd err = dnode_hold_impl(os, object, DNODE_MUST_BE_FREE, FTAG, &dn); 97168404Spjd if (err) 98168404Spjd return (err); 99168404Spjd dnode_allocate(dn, ot, blocksize, 0, bonustype, bonuslen, tx); 100168404Spjd dnode_rele(dn, FTAG); 101168404Spjd 102168404Spjd dmu_tx_add_new_object(tx, os, object); 103168404Spjd return (0); 104168404Spjd} 105168404Spjd 106168404Spjdint 107168404Spjddmu_object_reclaim(objset_t *os, uint64_t object, dmu_object_type_t ot, 108200726Sdelphij int blocksize, dmu_object_type_t bonustype, int bonuslen) 109168404Spjd{ 110168404Spjd dnode_t *dn; 111200726Sdelphij dmu_tx_t *tx; 112200726Sdelphij int nblkptr; 113168404Spjd int err; 114168404Spjd 115200726Sdelphij if (object == DMU_META_DNODE_OBJECT) 116249195Smm return (SET_ERROR(EBADF)); 117168404Spjd 118219089Spjd err = dnode_hold_impl(os, object, DNODE_MUST_BE_ALLOCATED, 119168404Spjd FTAG, &dn); 120168404Spjd if (err) 121168404Spjd return (err); 122200726Sdelphij 123200726Sdelphij if (dn->dn_type == ot && dn->dn_datablksz == blocksize && 124200726Sdelphij dn->dn_bonustype == bonustype && dn->dn_bonuslen == bonuslen) { 125200726Sdelphij /* nothing is changing, this is a noop */ 126200726Sdelphij dnode_rele(dn, FTAG); 127200726Sdelphij return (0); 128200726Sdelphij } 129200726Sdelphij 130219089Spjd if (bonustype == DMU_OT_SA) { 131219089Spjd nblkptr = 1; 132219089Spjd } else { 133219089Spjd nblkptr = 1 + ((DN_MAX_BONUSLEN - bonuslen) >> SPA_BLKPTRSHIFT); 134219089Spjd } 135200726Sdelphij 136200726Sdelphij /* 137200726Sdelphij * If we are losing blkptrs or changing the block size this must 138200726Sdelphij * be a new file instance. We must clear out the previous file 139200726Sdelphij * contents before we can change this type of metadata in the dnode. 140200726Sdelphij */ 141207624Smm if (dn->dn_nblkptr > nblkptr || dn->dn_datablksz != blocksize) { 142207624Smm err = dmu_free_long_range(os, object, 0, DMU_OBJECT_END); 143207624Smm if (err) 144207624Smm goto out; 145207624Smm } 146200726Sdelphij 147207624Smm tx = dmu_tx_create(os); 148207624Smm dmu_tx_hold_bonus(tx, object); 149207624Smm err = dmu_tx_assign(tx, TXG_WAIT); 150207624Smm if (err) { 151207624Smm dmu_tx_abort(tx); 152207624Smm goto out; 153207624Smm } 154207624Smm 155168404Spjd dnode_reallocate(dn, ot, blocksize, bonustype, bonuslen, tx); 156200726Sdelphij 157200726Sdelphij dmu_tx_commit(tx); 158207624Smmout: 159168404Spjd dnode_rele(dn, FTAG); 160168404Spjd 161207624Smm return (err); 162168404Spjd} 163168404Spjd 164168404Spjdint 165168404Spjddmu_object_free(objset_t *os, uint64_t object, dmu_tx_t *tx) 166168404Spjd{ 167168404Spjd dnode_t *dn; 168168404Spjd int err; 169168404Spjd 170168404Spjd ASSERT(object != DMU_META_DNODE_OBJECT || dmu_tx_private_ok(tx)); 171168404Spjd 172219089Spjd err = dnode_hold_impl(os, object, DNODE_MUST_BE_ALLOCATED, 173168404Spjd FTAG, &dn); 174168404Spjd if (err) 175168404Spjd return (err); 176168404Spjd 177168404Spjd ASSERT(dn->dn_type != DMU_OT_NONE); 178185029Spjd dnode_free_range(dn, 0, DMU_OBJECT_END, tx); 179168404Spjd dnode_free(dn, tx); 180168404Spjd dnode_rele(dn, FTAG); 181168404Spjd 182168404Spjd return (0); 183168404Spjd} 184168404Spjd 185168404Spjdint 186168404Spjddmu_object_next(objset_t *os, uint64_t *objectp, boolean_t hole, uint64_t txg) 187168404Spjd{ 188168404Spjd uint64_t offset = (*objectp + 1) << DNODE_SHIFT; 189168404Spjd int error; 190168404Spjd 191219089Spjd error = dnode_next_offset(DMU_META_DNODE(os), 192185029Spjd (hole ? DNODE_FIND_HOLE : 0), &offset, 0, DNODES_PER_BLOCK, txg); 193168404Spjd 194168404Spjd *objectp = offset >> DNODE_SHIFT; 195168404Spjd 196168404Spjd return (error); 197168404Spjd} 198