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37f03da8ba
Deleting a clone requires finding blocks are clone-only, not shared with the snapshot. This was done by traversing the entire block tree which results in a large performance penalty for sparsely written clones. This is new method keeps track of clone blocks when they are modified in a "Livelist" so that, when it’s time to delete, the clone-specific blocks are already at hand. We see performance improvements because now deletion work is proportional to the number of clone-modified blocks, not the size of the original dataset. Reviewed-by: Sean Eric Fagan <sef@ixsystems.com> Reviewed-by: Matt Ahrens <matt@delphix.com> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: Serapheim Dimitropoulos <serapheim@delphix.com> Signed-off-by: Sara Hartse <sara.hartse@delphix.com> Closes #8416
107 lines
3.2 KiB
C
107 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 http://www.opensolaris.org/os/licensing.
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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) 2010, Oracle and/or its affiliates. All rights reserved.
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* Copyright (c) 2015, 2019 by Delphix. All rights reserved.
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*/
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#ifndef _SYS_BPOBJ_H
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#define _SYS_BPOBJ_H
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#include <sys/dmu.h>
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#include <sys/spa.h>
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#include <sys/txg.h>
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#include <sys/zio.h>
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#include <sys/zfs_context.h>
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#include <sys/bplist.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef struct bpobj_phys {
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/*
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* This is the bonus buffer for the dead lists. The object's
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* contents is an array of bpo_entries blkptr_t's, representing
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* a total of bpo_bytes physical space.
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*/
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uint64_t bpo_num_blkptrs;
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uint64_t bpo_bytes;
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uint64_t bpo_comp;
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uint64_t bpo_uncomp;
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uint64_t bpo_subobjs;
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uint64_t bpo_num_subobjs;
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uint64_t bpo_num_freed;
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} bpobj_phys_t;
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#define BPOBJ_SIZE_V0 (2 * sizeof (uint64_t))
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#define BPOBJ_SIZE_V1 (4 * sizeof (uint64_t))
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#define BPOBJ_SIZE_V2 (6 * sizeof (uint64_t))
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typedef struct bpobj {
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kmutex_t bpo_lock;
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objset_t *bpo_os;
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uint64_t bpo_object;
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int bpo_epb;
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uint8_t bpo_havecomp;
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uint8_t bpo_havesubobj;
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uint8_t bpo_havefreed;
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bpobj_phys_t *bpo_phys;
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dmu_buf_t *bpo_dbuf;
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dmu_buf_t *bpo_cached_dbuf;
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} bpobj_t;
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typedef int bpobj_itor_t(void *arg, const blkptr_t *bp, boolean_t bp_freed,
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dmu_tx_t *tx);
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uint64_t bpobj_alloc(objset_t *mos, int blocksize, dmu_tx_t *tx);
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uint64_t bpobj_alloc_empty(objset_t *os, int blocksize, dmu_tx_t *tx);
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void bpobj_free(objset_t *os, uint64_t obj, dmu_tx_t *tx);
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void bpobj_decr_empty(objset_t *os, dmu_tx_t *tx);
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int bpobj_open(bpobj_t *bpo, objset_t *mos, uint64_t object);
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void bpobj_close(bpobj_t *bpo);
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boolean_t bpobj_is_open(const bpobj_t *bpo);
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int bpobj_iterate(bpobj_t *bpo, bpobj_itor_t func, void *arg, dmu_tx_t *tx);
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int bpobj_iterate_nofree(bpobj_t *bpo, bpobj_itor_t func, void *, uint64_t *);
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int livelist_bpobj_iterate_from_nofree(bpobj_t *bpo, bpobj_itor_t func,
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void *arg, int64_t start);
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void bpobj_enqueue_subobj(bpobj_t *bpo, uint64_t subobj, dmu_tx_t *tx);
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void bpobj_enqueue(bpobj_t *bpo, const blkptr_t *bp, boolean_t bp_freed,
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dmu_tx_t *tx);
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int bpobj_space(bpobj_t *bpo,
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uint64_t *usedp, uint64_t *compp, uint64_t *uncompp);
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int bpobj_space_range(bpobj_t *bpo, uint64_t mintxg, uint64_t maxtxg,
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uint64_t *usedp, uint64_t *compp, uint64_t *uncompp);
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boolean_t bpobj_is_empty(bpobj_t *bpo);
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int bplist_append_cb(void *arg, const blkptr_t *bp, boolean_t bp_freed,
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dmu_tx_t *tx);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _SYS_BPOBJ_H */
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