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62e7d3c89e
This change adds a new `zpool prefetch -t ddt $pool` command which causes a pool's DDT to be loaded into the ARC. The primary goal is to remove the need to "warm" a pool's cache before deduplication stops slowing write performance. It may also provide a way to reload portions of a DDT if they have been flushed due to inactivity. Sponsored-by: iXsystems, Inc. Sponsored-by: Catalogics, Inc. Sponsored-by: Klara, Inc. Reviewed-by: Alexander Motin <mav@FreeBSD.org> Reviewed-by: Tony Hutter <hutter2@llnl.gov> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Allan Jude <allan@klarasystems.com> Signed-off-by: Will Andrews <will.andrews@klarasystems.com> Signed-off-by: Fred Weigel <fred.weigel@klarasystems.com> Signed-off-by: Rob Norris <rob.norris@klarasystems.com> Signed-off-by: Don Brady <don.brady@klarasystems.com> Co-authored-by: Will Andrews <will.andrews@klarasystems.com> Co-authored-by: Don Brady <don.brady@klarasystems.com> Closes #15890
97 lines
3.2 KiB
C
97 lines
3.2 KiB
C
/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License (the "License").
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* You may not use this file except in compliance with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or https://opensource.org/licenses/CDDL-1.0.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
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* Copyright (c) 2016 by Delphix. All rights reserved.
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* Copyright (c) 2023, Klara Inc.
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*/
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#ifndef _SYS_DDT_IMPL_H
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#define _SYS_DDT_IMPL_H
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#include <sys/ddt.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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* Ops vector to access a specific DDT object type.
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*/
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typedef struct {
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char ddt_op_name[32];
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int (*ddt_op_create)(objset_t *os, uint64_t *object, dmu_tx_t *tx,
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boolean_t prehash);
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int (*ddt_op_destroy)(objset_t *os, uint64_t object, dmu_tx_t *tx);
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int (*ddt_op_lookup)(objset_t *os, uint64_t object,
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const ddt_key_t *ddk, ddt_phys_t *phys, size_t psize);
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int (*ddt_op_contains)(objset_t *os, uint64_t object,
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const ddt_key_t *ddk);
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void (*ddt_op_prefetch)(objset_t *os, uint64_t object,
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const ddt_key_t *ddk);
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void (*ddt_op_prefetch_all)(objset_t *os, uint64_t object);
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int (*ddt_op_update)(objset_t *os, uint64_t object,
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const ddt_key_t *ddk, const ddt_phys_t *phys, size_t psize,
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dmu_tx_t *tx);
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int (*ddt_op_remove)(objset_t *os, uint64_t object,
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const ddt_key_t *ddk, dmu_tx_t *tx);
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int (*ddt_op_walk)(objset_t *os, uint64_t object, uint64_t *walk,
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ddt_key_t *ddk, ddt_phys_t *phys, size_t psize);
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int (*ddt_op_count)(objset_t *os, uint64_t object, uint64_t *count);
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} ddt_ops_t;
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extern const ddt_ops_t ddt_zap_ops;
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extern void ddt_stat_update(ddt_t *ddt, ddt_entry_t *dde, uint64_t neg);
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/*
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* These are only exposed so that zdb can access them. Try not to use them
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* outside of the DDT implementation proper, and if you do, consider moving
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* them up.
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*/
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/*
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* Enough room to expand DMU_POOL_DDT format for all possible DDT
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* checksum/class/type combinations.
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*/
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#define DDT_NAMELEN 32
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extern uint64_t ddt_phys_total_refcnt(const ddt_entry_t *dde);
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extern void ddt_key_fill(ddt_key_t *ddk, const blkptr_t *bp);
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extern void ddt_stat_add(ddt_stat_t *dst, const ddt_stat_t *src, uint64_t neg);
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extern void ddt_object_name(ddt_t *ddt, ddt_type_t type, ddt_class_t clazz,
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char *name);
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extern int ddt_object_walk(ddt_t *ddt, ddt_type_t type, ddt_class_t clazz,
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uint64_t *walk, ddt_entry_t *dde);
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extern int ddt_object_count(ddt_t *ddt, ddt_type_t type, ddt_class_t clazz,
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uint64_t *count);
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extern int ddt_object_info(ddt_t *ddt, ddt_type_t type, ddt_class_t clazz,
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dmu_object_info_t *);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _SYS_DDT_H */
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