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 /* 222bf405a2SMark Maybee * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 23fa9e4066Sahrens * Use is subject to license terms. 24fa9e4066Sahrens */ 25fa9e4066Sahrens 26fa9e4066Sahrens #include <sys/dmu.h> 27fa9e4066Sahrens #include <sys/dmu_objset.h> 28fa9e4066Sahrens #include <sys/dmu_tx.h> 29fa9e4066Sahrens #include <sys/dnode.h> 30fa9e4066Sahrens 31fa9e4066Sahrens uint64_t 32fa9e4066Sahrens dmu_object_alloc(objset_t *os, dmu_object_type_t ot, int blocksize, 33fa9e4066Sahrens dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) 34fa9e4066Sahrens { 35fa9e4066Sahrens objset_impl_t *osi = os->os; 36fa9e4066Sahrens uint64_t object; 37fa9e4066Sahrens uint64_t L2_dnode_count = DNODES_PER_BLOCK << 38fa9e4066Sahrens (osi->os_meta_dnode->dn_indblkshift - SPA_BLKPTRSHIFT); 39ea8dc4b6Seschrock dnode_t *dn = NULL; 40fa9e4066Sahrens int restarted = B_FALSE; 41fa9e4066Sahrens 42fa9e4066Sahrens mutex_enter(&osi->os_obj_lock); 43fa9e4066Sahrens for (;;) { 44fa9e4066Sahrens object = osi->os_obj_next; 45fa9e4066Sahrens /* 46fa9e4066Sahrens * Each time we polish off an L2 bp worth of dnodes 47fa9e4066Sahrens * (2^13 objects), move to another L2 bp that's still 48fa9e4066Sahrens * reasonably sparse (at most 1/4 full). Look from the 49fa9e4066Sahrens * beginning once, but after that keep looking from here. 50fa9e4066Sahrens * If we can't find one, just keep going from here. 51fa9e4066Sahrens */ 52fa9e4066Sahrens if (P2PHASE(object, L2_dnode_count) == 0) { 53fa9e4066Sahrens uint64_t offset = restarted ? object << DNODE_SHIFT : 0; 54fa9e4066Sahrens int error = dnode_next_offset(osi->os_meta_dnode, 55cdb0ab79Smaybee DNODE_FIND_HOLE, 56cdb0ab79Smaybee &offset, 2, DNODES_PER_BLOCK >> 2, 0); 57fa9e4066Sahrens restarted = B_TRUE; 58fa9e4066Sahrens if (error == 0) 59fa9e4066Sahrens object = offset >> DNODE_SHIFT; 60fa9e4066Sahrens } 61fa9e4066Sahrens osi->os_obj_next = ++object; 62fa9e4066Sahrens 63ea8dc4b6Seschrock /* 64ea8dc4b6Seschrock * XXX We should check for an i/o error here and return 65ea8dc4b6Seschrock * up to our caller. Actually we should pre-read it in 66ea8dc4b6Seschrock * dmu_tx_assign(), but there is currently no mechanism 67ea8dc4b6Seschrock * to do so. 68ea8dc4b6Seschrock */ 69ea8dc4b6Seschrock (void) dnode_hold_impl(os->os, object, DNODE_MUST_BE_FREE, 70ea8dc4b6Seschrock FTAG, &dn); 71fa9e4066Sahrens if (dn) 72fa9e4066Sahrens break; 73fa9e4066Sahrens 746754306eSahrens if (dmu_object_next(os, &object, B_TRUE, 0) == 0) 75fa9e4066Sahrens osi->os_obj_next = object - 1; 76fa9e4066Sahrens } 77fa9e4066Sahrens 78fa9e4066Sahrens dnode_allocate(dn, ot, blocksize, 0, bonustype, bonuslen, tx); 79fa9e4066Sahrens dnode_rele(dn, FTAG); 80fa9e4066Sahrens 81fa9e4066Sahrens mutex_exit(&osi->os_obj_lock); 82fa9e4066Sahrens 83fa9e4066Sahrens dmu_tx_add_new_object(tx, os, object); 84fa9e4066Sahrens return (object); 85fa9e4066Sahrens } 86fa9e4066Sahrens 87fa9e4066Sahrens int 88fa9e4066Sahrens dmu_object_claim(objset_t *os, uint64_t object, dmu_object_type_t ot, 89fa9e4066Sahrens int blocksize, dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) 90fa9e4066Sahrens { 91fa9e4066Sahrens dnode_t *dn; 92ea8dc4b6Seschrock int err; 93fa9e4066Sahrens 94ea8dc4b6Seschrock if (object == DMU_META_DNODE_OBJECT && !dmu_tx_private_ok(tx)) 95fa9e4066Sahrens return (EBADF); 96fa9e4066Sahrens 97ea8dc4b6Seschrock err = dnode_hold_impl(os->os, object, DNODE_MUST_BE_FREE, FTAG, &dn); 98ea8dc4b6Seschrock if (err) 99ea8dc4b6Seschrock return (err); 100fa9e4066Sahrens dnode_allocate(dn, ot, blocksize, 0, bonustype, bonuslen, tx); 101fa9e4066Sahrens dnode_rele(dn, FTAG); 102fa9e4066Sahrens 103fa9e4066Sahrens dmu_tx_add_new_object(tx, os, object); 104fa9e4066Sahrens return (0); 105fa9e4066Sahrens } 106fa9e4066Sahrens 107fa9e4066Sahrens int 108fa9e4066Sahrens dmu_object_reclaim(objset_t *os, uint64_t object, dmu_object_type_t ot, 1092bf405a2SMark Maybee int blocksize, dmu_object_type_t bonustype, int bonuslen) 110fa9e4066Sahrens { 111fa9e4066Sahrens dnode_t *dn; 1122bf405a2SMark Maybee dmu_tx_t *tx; 1132bf405a2SMark Maybee int nblkptr; 114ea8dc4b6Seschrock int err; 115fa9e4066Sahrens 1162bf405a2SMark Maybee if (object == DMU_META_DNODE_OBJECT) 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); 1232bf405a2SMark Maybee 1242bf405a2SMark Maybee if (dn->dn_type == ot && dn->dn_datablksz == blocksize && 1252bf405a2SMark Maybee dn->dn_bonustype == bonustype && dn->dn_bonuslen == bonuslen) { 1262bf405a2SMark Maybee /* nothing is changing, this is a noop */ 1272bf405a2SMark Maybee dnode_rele(dn, FTAG); 1282bf405a2SMark Maybee return (0); 1292bf405a2SMark Maybee } 1302bf405a2SMark Maybee 1312bf405a2SMark Maybee nblkptr = 1 + ((DN_MAX_BONUSLEN - bonuslen) >> SPA_BLKPTRSHIFT); 1322bf405a2SMark Maybee 1332bf405a2SMark Maybee /* 1342bf405a2SMark Maybee * If we are losing blkptrs or changing the block size this must 1352bf405a2SMark Maybee * be a new file instance. We must clear out the previous file 1362bf405a2SMark Maybee * contents before we can change this type of metadata in the dnode. 1372bf405a2SMark Maybee */ 138*cf04dda1SMark Maybee if (dn->dn_nblkptr > nblkptr || dn->dn_datablksz != blocksize) { 139*cf04dda1SMark Maybee err = dmu_free_long_range(os, object, 0, DMU_OBJECT_END); 140*cf04dda1SMark Maybee if (err) 141*cf04dda1SMark Maybee goto out; 142*cf04dda1SMark Maybee } 143*cf04dda1SMark Maybee 144*cf04dda1SMark Maybee tx = dmu_tx_create(os); 145*cf04dda1SMark Maybee dmu_tx_hold_bonus(tx, object); 146*cf04dda1SMark Maybee err = dmu_tx_assign(tx, TXG_WAIT); 147*cf04dda1SMark Maybee if (err) { 148*cf04dda1SMark Maybee dmu_tx_abort(tx); 149*cf04dda1SMark Maybee goto out; 150*cf04dda1SMark Maybee } 1512bf405a2SMark Maybee 152fa9e4066Sahrens dnode_reallocate(dn, ot, blocksize, bonustype, bonuslen, tx); 1532bf405a2SMark Maybee 1542bf405a2SMark Maybee dmu_tx_commit(tx); 155*cf04dda1SMark Maybee out: 156fa9e4066Sahrens dnode_rele(dn, FTAG); 157fa9e4066Sahrens 158*cf04dda1SMark Maybee return (err); 159fa9e4066Sahrens } 160fa9e4066Sahrens 161fa9e4066Sahrens int 162fa9e4066Sahrens dmu_object_free(objset_t *os, uint64_t object, dmu_tx_t *tx) 163fa9e4066Sahrens { 164fa9e4066Sahrens dnode_t *dn; 165ea8dc4b6Seschrock int err; 166fa9e4066Sahrens 167ea8dc4b6Seschrock ASSERT(object != DMU_META_DNODE_OBJECT || dmu_tx_private_ok(tx)); 168fa9e4066Sahrens 169ea8dc4b6Seschrock err = dnode_hold_impl(os->os, object, DNODE_MUST_BE_ALLOCATED, 170ea8dc4b6Seschrock FTAG, &dn); 171ea8dc4b6Seschrock if (err) 172ea8dc4b6Seschrock return (err); 173fa9e4066Sahrens 174fa9e4066Sahrens ASSERT(dn->dn_type != DMU_OT_NONE); 175cdb0ab79Smaybee dnode_free_range(dn, 0, DMU_OBJECT_END, tx); 176fa9e4066Sahrens dnode_free(dn, tx); 177fa9e4066Sahrens dnode_rele(dn, FTAG); 178fa9e4066Sahrens 179fa9e4066Sahrens return (0); 180fa9e4066Sahrens } 181fa9e4066Sahrens 182fa9e4066Sahrens int 1836754306eSahrens dmu_object_next(objset_t *os, uint64_t *objectp, boolean_t hole, uint64_t txg) 184fa9e4066Sahrens { 185fa9e4066Sahrens uint64_t offset = (*objectp + 1) << DNODE_SHIFT; 186fa9e4066Sahrens int error; 187fa9e4066Sahrens 188fa9e4066Sahrens error = dnode_next_offset(os->os->os_meta_dnode, 189cdb0ab79Smaybee (hole ? DNODE_FIND_HOLE : 0), &offset, 0, DNODES_PER_BLOCK, txg); 190fa9e4066Sahrens 191fa9e4066Sahrens *objectp = offset >> DNODE_SHIFT; 192fa9e4066Sahrens 193fa9e4066Sahrens return (error); 194fa9e4066Sahrens } 195