fs/zfs/ddt_zap.c

b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick/*
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick * CDDL HEADER START
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick *
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick * The contents of this file are subject to the terms of the
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick * Common Development and Distribution License (the "License").
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick * You may not use this file except in compliance with the License.
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick *
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick * or http://www.opensolaris.org/os/licensing.
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick * See the License for the specific language governing permissions
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick * and limitations under the License.
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick *
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick * When distributing Covered Code, include this CDDL HEADER in each
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick */
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick/*
c7cd242109c82107ec2e50013369e92be9d77702George Wilson * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick */
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick#include <sys/zfs_context.h>
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick#include <sys/spa.h>
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick#include <sys/zio.h>
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick#include <sys/ddt.h>
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick#include <sys/zap.h>
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick#include <sys/dmu_tx.h>
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick#include <util/sscanf.h>
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwickint ddt_zap_leaf_blockshift = 12;
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwickint ddt_zap_indirect_blockshift = 12;
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwickstatic int
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwickddt_zap_create(objset_t *os, uint64_t *objectp, dmu_tx_t *tx, boolean_t prehash)
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick{
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick    zap_flags_t flags = ZAP_FLAG_HASH64 | ZAP_FLAG_UINT64_KEY;
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick    if (prehash)
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick        flags |= ZAP_FLAG_PRE_HASHED_KEY;
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick    *objectp = zap_create_flags(os, 0, flags, DMU_OT_DDT_ZAP,
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick        ddt_zap_leaf_blockshift, ddt_zap_indirect_blockshift,
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick        DMU_OT_NONE, 0, tx);
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick    return (*objectp == 0 ? ENOTSUP : 0);
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick}
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwickstatic int
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwickddt_zap_destroy(objset_t *os, uint64_t object, dmu_tx_t *tx)
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick{
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick    return (zap_destroy(os, object, tx));
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick}
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwickstatic int
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwickddt_zap_lookup(objset_t *os, uint64_t object, ddt_entry_t *dde)
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick{
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick    uchar_t cbuf[sizeof (dde->dde_phys) + 1];
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick    uint64_t one, csize;
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick    int error;
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick    error = zap_length_uint64(os, object, (uint64_t *)&dde->dde_key,
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick        DDT_KEY_WORDS, &one, &csize);
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick    if (error)
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick        return (error);
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick    ASSERT(one == 1);
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick    ASSERT(csize <= sizeof (cbuf));
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick    error = zap_lookup_uint64(os, object, (uint64_t *)&dde->dde_key,
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick        DDT_KEY_WORDS, 1, csize, cbuf);
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick    if (error)
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick        return (error);
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick    ddt_decompress(cbuf, dde->dde_phys, csize, sizeof (dde->dde_phys));
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick    return (0);
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick}
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick
c7cd242109c82107ec2e50013369e92be9d77702George Wilsonstatic void
c7cd242109c82107ec2e50013369e92be9d77702George Wilsonddt_zap_prefetch(objset_t *os, uint64_t object, ddt_entry_t *dde)
c7cd242109c82107ec2e50013369e92be9d77702George Wilson{
c7cd242109c82107ec2e50013369e92be9d77702George Wilson    (void) zap_prefetch_uint64(os, object, (uint64_t *)&dde->dde_key,
c7cd242109c82107ec2e50013369e92be9d77702George Wilson        DDT_KEY_WORDS);
c7cd242109c82107ec2e50013369e92be9d77702George Wilson}
c7cd242109c82107ec2e50013369e92be9d77702George Wilson
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwickstatic int
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwickddt_zap_update(objset_t *os, uint64_t object, ddt_entry_t *dde, dmu_tx_t *tx)
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick{
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick    uchar_t cbuf[sizeof (dde->dde_phys) + 1];
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick    uint64_t csize;
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick    csize = ddt_compress(dde->dde_phys, cbuf,
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick        sizeof (dde->dde_phys), sizeof (cbuf));
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick    return (zap_update_uint64(os, object, (uint64_t *)&dde->dde_key,
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick        DDT_KEY_WORDS, 1, csize, cbuf, tx));
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick}
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwickstatic int
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwickddt_zap_remove(objset_t *os, uint64_t object, ddt_entry_t *dde, dmu_tx_t *tx)
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick{
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick    return (zap_remove_uint64(os, object, (uint64_t *)&dde->dde_key,
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick        DDT_KEY_WORDS, tx));
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick}
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwickstatic int
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwickddt_zap_walk(objset_t *os, uint64_t object, ddt_entry_t *dde, uint64_t *walk)
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick{
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick    zap_cursor_t zc;
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick    zap_attribute_t za;
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick    int error;
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick    zap_cursor_init_serialized(&zc, os, object, *walk);
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick    if ((error = zap_cursor_retrieve(&zc, &za)) == 0) {
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick        uchar_t cbuf[sizeof (dde->dde_phys) + 1];
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick        uint64_t csize = za.za_num_integers;
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick        ASSERT(za.za_integer_length == 1);
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick        error = zap_lookup_uint64(os, object, (uint64_t *)za.za_name,
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick            DDT_KEY_WORDS, 1, csize, cbuf);
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick        ASSERT(error == 0);
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick        if (error == 0) {
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick            ddt_decompress(cbuf, dde->dde_phys, csize,
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick                sizeof (dde->dde_phys));
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick            dde->dde_key = *(ddt_key_t *)za.za_name;
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick        }
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick        zap_cursor_advance(&zc);
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick        *walk = zap_cursor_serialize(&zc);
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick    }
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick    zap_cursor_fini(&zc);
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick    return (error);
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick}
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwickstatic uint64_t
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwickddt_zap_count(objset_t *os, uint64_t object)
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick{
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick    uint64_t count = 0;
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick    VERIFY(zap_count(os, object, &count) == 0);
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick    return (count);
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick}
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwickconst ddt_ops_t ddt_zap_ops = {
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick    "zap",
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick    ddt_zap_create,
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick    ddt_zap_destroy,
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick    ddt_zap_lookup,
c7cd242109c82107ec2e50013369e92be9d77702George Wilson    ddt_zap_prefetch,
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick    ddt_zap_update,
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick    ddt_zap_remove,
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick    ddt_zap_walk,
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick    ddt_zap_count,
b24ab6762772a3f6a89393947930c7fa61306783Jeff Bonwick};