4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
22 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
26 #pragma ident "%Z%%M% %I% %E% SMI"
29 #include <sys/dmu_objset.h>
30 #include <sys/dmu_tx.h>
31 #include <sys/dnode.h>
34 dmu_object_alloc(objset_t *os, dmu_object_type_t ot, int blocksize,
35 dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx)
37 objset_impl_t *osi = os->os;
39 uint64_t L2_dnode_count = DNODES_PER_BLOCK <<
40 (osi->os_meta_dnode->dn_indblkshift - SPA_BLKPTRSHIFT);
42 int restarted = B_FALSE;
44 mutex_enter(&osi->os_obj_lock);
46 object = osi->os_obj_next;
48 * Each time we polish off an L2 bp worth of dnodes
49 * (2^13 objects), move to another L2 bp that's still
50 * reasonably sparse (at most 1/4 full). Look from the
51 * beginning once, but after that keep looking from here.
52 * If we can't find one, just keep going from here.
54 if (P2PHASE(object, L2_dnode_count) == 0) {
55 uint64_t offset = restarted ? object << DNODE_SHIFT : 0;
56 int error = dnode_next_offset(osi->os_meta_dnode,
57 B_TRUE, &offset, 2, DNODES_PER_BLOCK >> 2, 0);
60 object = offset >> DNODE_SHIFT;
62 osi->os_obj_next = ++object;
65 * XXX We should check for an i/o error here and return
66 * up to our caller. Actually we should pre-read it in
67 * dmu_tx_assign(), but there is currently no mechanism
70 (void) dnode_hold_impl(os->os, object, DNODE_MUST_BE_FREE,
75 if (dmu_object_next(os, &object, B_TRUE, 0) == 0)
76 osi->os_obj_next = object - 1;
79 dnode_allocate(dn, ot, blocksize, 0, bonustype, bonuslen, tx);
82 mutex_exit(&osi->os_obj_lock);
84 dmu_tx_add_new_object(tx, os, object);
89 dmu_object_claim(objset_t *os, uint64_t object, dmu_object_type_t ot,
90 int blocksize, dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx)
95 if (object == DMU_META_DNODE_OBJECT && !dmu_tx_private_ok(tx))
98 err = dnode_hold_impl(os->os, object, DNODE_MUST_BE_FREE, FTAG, &dn);
101 dnode_allocate(dn, ot, blocksize, 0, bonustype, bonuslen, tx);
102 dnode_rele(dn, FTAG);
104 dmu_tx_add_new_object(tx, os, object);
109 dmu_object_reclaim(objset_t *os, uint64_t object, dmu_object_type_t ot,
110 int blocksize, dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx)
115 if (object == DMU_META_DNODE_OBJECT && !dmu_tx_private_ok(tx))
118 err = dnode_hold_impl(os->os, object, DNODE_MUST_BE_ALLOCATED,
122 dnode_reallocate(dn, ot, blocksize, bonustype, bonuslen, tx);
123 dnode_rele(dn, FTAG);
129 dmu_object_free(objset_t *os, uint64_t object, dmu_tx_t *tx)
134 ASSERT(object != DMU_META_DNODE_OBJECT || dmu_tx_private_ok(tx));
136 err = dnode_hold_impl(os->os, object, DNODE_MUST_BE_ALLOCATED,
141 ASSERT(dn->dn_type != DMU_OT_NONE);
143 dnode_rele(dn, FTAG);
149 dmu_object_next(objset_t *os, uint64_t *objectp, boolean_t hole, uint64_t txg)
151 uint64_t offset = (*objectp + 1) << DNODE_SHIFT;
154 error = dnode_next_offset(os->os->os_meta_dnode,
155 hole, &offset, 0, DNODES_PER_BLOCK, txg);
157 *objectp = offset >> DNODE_SHIFT;