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*06e0070dSMark Shellenbaum * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 23fa9e4066Sahrens */ 24fa9e4066Sahrens 25fa9e4066Sahrens #include <sys/dmu.h> 26fa9e4066Sahrens #include <sys/dmu_objset.h> 27fa9e4066Sahrens #include <sys/dmu_tx.h> 28fa9e4066Sahrens #include <sys/dnode.h> 29fa9e4066Sahrens 30fa9e4066Sahrens uint64_t 31fa9e4066Sahrens dmu_object_alloc(objset_t *os, dmu_object_type_t ot, int blocksize, 32fa9e4066Sahrens dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) 33fa9e4066Sahrens { 34fa9e4066Sahrens uint64_t object; 35fa9e4066Sahrens uint64_t L2_dnode_count = DNODES_PER_BLOCK << 36503ad85cSMatthew Ahrens (os->os_meta_dnode->dn_indblkshift - SPA_BLKPTRSHIFT); 37ea8dc4b6Seschrock dnode_t *dn = NULL; 38fa9e4066Sahrens int restarted = B_FALSE; 39fa9e4066Sahrens 40503ad85cSMatthew Ahrens mutex_enter(&os->os_obj_lock); 41fa9e4066Sahrens for (;;) { 42503ad85cSMatthew Ahrens object = os->os_obj_next; 43fa9e4066Sahrens /* 44fa9e4066Sahrens * Each time we polish off an L2 bp worth of dnodes 45fa9e4066Sahrens * (2^13 objects), move to another L2 bp that's still 46fa9e4066Sahrens * reasonably sparse (at most 1/4 full). Look from the 47fa9e4066Sahrens * beginning once, but after that keep looking from here. 48fa9e4066Sahrens * If we can't find one, just keep going from here. 49fa9e4066Sahrens */ 50fa9e4066Sahrens if (P2PHASE(object, L2_dnode_count) == 0) { 51fa9e4066Sahrens uint64_t offset = restarted ? object << DNODE_SHIFT : 0; 52503ad85cSMatthew Ahrens int error = dnode_next_offset(os->os_meta_dnode, 53cdb0ab79Smaybee DNODE_FIND_HOLE, 54cdb0ab79Smaybee &offset, 2, DNODES_PER_BLOCK >> 2, 0); 55fa9e4066Sahrens restarted = B_TRUE; 56fa9e4066Sahrens if (error == 0) 57fa9e4066Sahrens object = offset >> DNODE_SHIFT; 58fa9e4066Sahrens } 59503ad85cSMatthew Ahrens os->os_obj_next = ++object; 60fa9e4066Sahrens 61ea8dc4b6Seschrock /* 62ea8dc4b6Seschrock * XXX We should check for an i/o error here and return 63ea8dc4b6Seschrock * up to our caller. Actually we should pre-read it in 64ea8dc4b6Seschrock * dmu_tx_assign(), but there is currently no mechanism 65ea8dc4b6Seschrock * to do so. 66ea8dc4b6Seschrock */ 67503ad85cSMatthew Ahrens (void) dnode_hold_impl(os, object, DNODE_MUST_BE_FREE, 68ea8dc4b6Seschrock FTAG, &dn); 69fa9e4066Sahrens if (dn) 70fa9e4066Sahrens break; 71fa9e4066Sahrens 726754306eSahrens if (dmu_object_next(os, &object, B_TRUE, 0) == 0) 73503ad85cSMatthew Ahrens os->os_obj_next = object - 1; 74fa9e4066Sahrens } 75fa9e4066Sahrens 76fa9e4066Sahrens dnode_allocate(dn, ot, blocksize, 0, bonustype, bonuslen, tx); 77fa9e4066Sahrens dnode_rele(dn, FTAG); 78fa9e4066Sahrens 79503ad85cSMatthew Ahrens mutex_exit(&os->os_obj_lock); 80fa9e4066Sahrens 81fa9e4066Sahrens dmu_tx_add_new_object(tx, os, object); 82fa9e4066Sahrens return (object); 83fa9e4066Sahrens } 84fa9e4066Sahrens 85fa9e4066Sahrens int 86fa9e4066Sahrens dmu_object_claim(objset_t *os, uint64_t object, dmu_object_type_t ot, 87fa9e4066Sahrens int blocksize, dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) 88fa9e4066Sahrens { 89fa9e4066Sahrens dnode_t *dn; 90ea8dc4b6Seschrock int err; 91fa9e4066Sahrens 92ea8dc4b6Seschrock if (object == DMU_META_DNODE_OBJECT && !dmu_tx_private_ok(tx)) 93fa9e4066Sahrens return (EBADF); 94fa9e4066Sahrens 95503ad85cSMatthew Ahrens err = dnode_hold_impl(os, object, DNODE_MUST_BE_FREE, FTAG, &dn); 96ea8dc4b6Seschrock if (err) 97ea8dc4b6Seschrock return (err); 98fa9e4066Sahrens dnode_allocate(dn, ot, blocksize, 0, bonustype, bonuslen, tx); 99fa9e4066Sahrens dnode_rele(dn, FTAG); 100fa9e4066Sahrens 101fa9e4066Sahrens dmu_tx_add_new_object(tx, os, object); 102fa9e4066Sahrens return (0); 103fa9e4066Sahrens } 104fa9e4066Sahrens 105fa9e4066Sahrens int 106fa9e4066Sahrens dmu_object_reclaim(objset_t *os, uint64_t object, dmu_object_type_t ot, 1072bf405a2SMark Maybee int blocksize, dmu_object_type_t bonustype, int bonuslen) 108fa9e4066Sahrens { 109fa9e4066Sahrens dnode_t *dn; 1102bf405a2SMark Maybee dmu_tx_t *tx; 1112bf405a2SMark Maybee int nblkptr; 112ea8dc4b6Seschrock int err; 113fa9e4066Sahrens 1142bf405a2SMark Maybee if (object == DMU_META_DNODE_OBJECT) 115fa9e4066Sahrens return (EBADF); 116fa9e4066Sahrens 117503ad85cSMatthew Ahrens err = dnode_hold_impl(os, object, DNODE_MUST_BE_ALLOCATED, 118ea8dc4b6Seschrock FTAG, &dn); 119ea8dc4b6Seschrock if (err) 120ea8dc4b6Seschrock return (err); 1212bf405a2SMark Maybee 1222bf405a2SMark Maybee if (dn->dn_type == ot && dn->dn_datablksz == blocksize && 1232bf405a2SMark Maybee dn->dn_bonustype == bonustype && dn->dn_bonuslen == bonuslen) { 1242bf405a2SMark Maybee /* nothing is changing, this is a noop */ 1252bf405a2SMark Maybee dnode_rele(dn, FTAG); 1262bf405a2SMark Maybee return (0); 1272bf405a2SMark Maybee } 1282bf405a2SMark Maybee 129*06e0070dSMark Shellenbaum if (bonustype == DMU_OT_SA) { 130*06e0070dSMark Shellenbaum nblkptr = 1; 131*06e0070dSMark Shellenbaum } else { 132*06e0070dSMark Shellenbaum nblkptr = 1 + ((DN_MAX_BONUSLEN - bonuslen) >> SPA_BLKPTRSHIFT); 133*06e0070dSMark Shellenbaum } 1342bf405a2SMark Maybee 1352bf405a2SMark Maybee /* 1362bf405a2SMark Maybee * If we are losing blkptrs or changing the block size this must 1372bf405a2SMark Maybee * be a new file instance. We must clear out the previous file 1382bf405a2SMark Maybee * contents before we can change this type of metadata in the dnode. 1392bf405a2SMark Maybee */ 140cf04dda1SMark Maybee if (dn->dn_nblkptr > nblkptr || dn->dn_datablksz != blocksize) { 141cf04dda1SMark Maybee err = dmu_free_long_range(os, object, 0, DMU_OBJECT_END); 142cf04dda1SMark Maybee if (err) 143cf04dda1SMark Maybee goto out; 144cf04dda1SMark Maybee } 145cf04dda1SMark Maybee 146cf04dda1SMark Maybee tx = dmu_tx_create(os); 147cf04dda1SMark Maybee dmu_tx_hold_bonus(tx, object); 148cf04dda1SMark Maybee err = dmu_tx_assign(tx, TXG_WAIT); 149cf04dda1SMark Maybee if (err) { 150cf04dda1SMark Maybee dmu_tx_abort(tx); 151cf04dda1SMark Maybee goto out; 152cf04dda1SMark Maybee } 1532bf405a2SMark Maybee 154fa9e4066Sahrens dnode_reallocate(dn, ot, blocksize, bonustype, bonuslen, tx); 1552bf405a2SMark Maybee 1562bf405a2SMark Maybee dmu_tx_commit(tx); 157cf04dda1SMark Maybee out: 158fa9e4066Sahrens dnode_rele(dn, FTAG); 159fa9e4066Sahrens 160cf04dda1SMark Maybee return (err); 161fa9e4066Sahrens } 162fa9e4066Sahrens 163fa9e4066Sahrens int 164fa9e4066Sahrens dmu_object_free(objset_t *os, uint64_t object, dmu_tx_t *tx) 165fa9e4066Sahrens { 166fa9e4066Sahrens dnode_t *dn; 167ea8dc4b6Seschrock int err; 168fa9e4066Sahrens 169ea8dc4b6Seschrock ASSERT(object != DMU_META_DNODE_OBJECT || dmu_tx_private_ok(tx)); 170fa9e4066Sahrens 171503ad85cSMatthew Ahrens err = dnode_hold_impl(os, object, DNODE_MUST_BE_ALLOCATED, 172ea8dc4b6Seschrock FTAG, &dn); 173ea8dc4b6Seschrock if (err) 174ea8dc4b6Seschrock return (err); 175fa9e4066Sahrens 176fa9e4066Sahrens ASSERT(dn->dn_type != DMU_OT_NONE); 177cdb0ab79Smaybee dnode_free_range(dn, 0, DMU_OBJECT_END, tx); 178fa9e4066Sahrens dnode_free(dn, tx); 179fa9e4066Sahrens dnode_rele(dn, FTAG); 180fa9e4066Sahrens 181fa9e4066Sahrens return (0); 182fa9e4066Sahrens } 183fa9e4066Sahrens 184fa9e4066Sahrens int 1856754306eSahrens dmu_object_next(objset_t *os, uint64_t *objectp, boolean_t hole, uint64_t txg) 186fa9e4066Sahrens { 187fa9e4066Sahrens uint64_t offset = (*objectp + 1) << DNODE_SHIFT; 188fa9e4066Sahrens int error; 189fa9e4066Sahrens 190503ad85cSMatthew Ahrens error = dnode_next_offset(os->os_meta_dnode, 191cdb0ab79Smaybee (hole ? DNODE_FIND_HOLE : 0), &offset, 0, DNODES_PER_BLOCK, txg); 192fa9e4066Sahrens 193fa9e4066Sahrens *objectp = offset >> DNODE_SHIFT; 194fa9e4066Sahrens 195fa9e4066Sahrens return (error); 196fa9e4066Sahrens } 197