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]
23 * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
26 #include <sys/zfs_context.h>
31 #include <sys/dmu_tx.h>
33 int ddt_zap_leaf_blockshift = 12;
34 int ddt_zap_indirect_blockshift = 12;
37 ddt_zap_create(objset_t *os, uint64_t *objectp, dmu_tx_t *tx, boolean_t prehash)
39 zap_flags_t flags = ZAP_FLAG_HASH64 | ZAP_FLAG_UINT64_KEY;
42 flags |= ZAP_FLAG_PRE_HASHED_KEY;
44 *objectp = zap_create_flags(os, 0, flags, DMU_OT_DDT_ZAP,
45 ddt_zap_leaf_blockshift, ddt_zap_indirect_blockshift,
48 return (*objectp == 0 ? ENOTSUP : 0);
52 ddt_zap_destroy(objset_t *os, uint64_t object, dmu_tx_t *tx)
54 return (zap_destroy(os, object, tx));
58 ddt_zap_lookup(objset_t *os, uint64_t object, ddt_entry_t *dde)
60 uchar_t cbuf[sizeof (dde->dde_phys) + 1];
64 error = zap_length_uint64(os, object, (uint64_t *)&dde->dde_key,
65 DDT_KEY_WORDS, &one, &csize);
70 ASSERT(csize <= sizeof (cbuf));
72 error = zap_lookup_uint64(os, object, (uint64_t *)&dde->dde_key,
73 DDT_KEY_WORDS, 1, csize, cbuf);
77 ddt_decompress(cbuf, dde->dde_phys, csize, sizeof (dde->dde_phys));
83 ddt_zap_prefetch(objset_t *os, uint64_t object, ddt_entry_t *dde)
85 (void) zap_prefetch_uint64(os, object, (uint64_t *)&dde->dde_key,
90 ddt_zap_update(objset_t *os, uint64_t object, ddt_entry_t *dde, dmu_tx_t *tx)
92 uchar_t cbuf[sizeof (dde->dde_phys) + 1];
95 csize = ddt_compress(dde->dde_phys, cbuf,
96 sizeof (dde->dde_phys), sizeof (cbuf));
98 return (zap_update_uint64(os, object, (uint64_t *)&dde->dde_key,
99 DDT_KEY_WORDS, 1, csize, cbuf, tx));
103 ddt_zap_remove(objset_t *os, uint64_t object, ddt_entry_t *dde, dmu_tx_t *tx)
105 return (zap_remove_uint64(os, object, (uint64_t *)&dde->dde_key,
110 ddt_zap_walk(objset_t *os, uint64_t object, ddt_entry_t *dde, uint64_t *walk)
116 zap_cursor_init_serialized(&zc, os, object, *walk);
117 if ((error = zap_cursor_retrieve(&zc, &za)) == 0) {
118 uchar_t cbuf[sizeof (dde->dde_phys) + 1];
119 uint64_t csize = za.za_num_integers;
120 ASSERT(za.za_integer_length == 1);
121 error = zap_lookup_uint64(os, object, (uint64_t *)za.za_name,
122 DDT_KEY_WORDS, 1, csize, cbuf);
125 ddt_decompress(cbuf, dde->dde_phys, csize,
126 sizeof (dde->dde_phys));
127 dde->dde_key = *(ddt_key_t *)za.za_name;
129 zap_cursor_advance(&zc);
130 *walk = zap_cursor_serialize(&zc);
132 zap_cursor_fini(&zc);
137 ddt_zap_count(objset_t *os, uint64_t object, uint64_t *count)
140 return (zap_count(os, object, count));
143 const ddt_ops_t ddt_zap_ops = {