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zfs/include/sys/brt.h

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Implementation of block cloning for ZFS Block Cloning allows to manually clone a file (or a subset of its blocks) into another (or the same) file by just creating additional references to the data blocks without copying the data itself. Those references are kept in the Block Reference Tables (BRTs). The whole design of block cloning is documented in module/zfs/brt.c. Reviewed-by: Alexander Motin <mav@FreeBSD.org> Reviewed-by: Christian Schwarz <christian.schwarz@nutanix.com> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: Rich Ercolani <rincebrain@gmail.com> Signed-off-by: Pawel Jakub Dawidek <pawel@dawidek.net> Closes #13392
2023-03-10 19:59:53 +00:00
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
Replace dead opensolaris.org license links The commit replaces all findings of the link: http://www.opensolaris.org/os/licensing with this one: https://opensource.org/licenses/CDDL-1.0 Reviewed-by: George Melikov <mail@gmelikov.ru> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: WHR <msl0000023508@gmail.com> Signed-off-by: Tino Reichardt <milky-zfs@mcmilk.de> Closes #14625
2023-03-14 21:44:01 +00:00
* or https://opensource.org/licenses/CDDL-1.0.
Implementation of block cloning for ZFS Block Cloning allows to manually clone a file (or a subset of its blocks) into another (or the same) file by just creating additional references to the data blocks without copying the data itself. Those references are kept in the Block Reference Tables (BRTs). The whole design of block cloning is documented in module/zfs/brt.c. Reviewed-by: Alexander Motin <mav@FreeBSD.org> Reviewed-by: Christian Schwarz <christian.schwarz@nutanix.com> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: Rich Ercolani <rincebrain@gmail.com> Signed-off-by: Pawel Jakub Dawidek <pawel@dawidek.net> Closes #13392
2023-03-10 19:59:53 +00:00
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 2020, 2021, 2022 by Pawel Jakub Dawidek
*/
#ifndef _SYS_BRT_H
#define _SYS_BRT_H
#include <sys/sysmacros.h>
#include <sys/types.h>
#include <sys/fs/zfs.h>
#include <sys/zio.h>
#include <sys/dmu.h>
#ifdef __cplusplus
extern "C" {
#endif
extern boolean_t brt_entry_decref(spa_t *spa, const blkptr_t *bp);
zdb: include cloned blocks in block statistics This gives `zdb -b` support for clone blocks. Previously, it didn't know what clones were, so would count their space allocation multiple times and then report leaked space (or, in debug, would assert trying to claim blocks a second time). This commit fixes those bugs, and reports the number of clones and the space "used" (saved) by them. Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: Kay Pedersen <mail@mkwg.de> Signed-off-by: Rob Norris <rob.norris@klarasystems.com> Sponsored-By: OpenDrives Inc. Sponsored-By: Klara Inc. Closes #15123
2023-08-01 15:56:30 +00:00
extern uint64_t brt_entry_get_refcount(spa_t *spa, const blkptr_t *bp);
Implementation of block cloning for ZFS Block Cloning allows to manually clone a file (or a subset of its blocks) into another (or the same) file by just creating additional references to the data blocks without copying the data itself. Those references are kept in the Block Reference Tables (BRTs). The whole design of block cloning is documented in module/zfs/brt.c. Reviewed-by: Alexander Motin <mav@FreeBSD.org> Reviewed-by: Christian Schwarz <christian.schwarz@nutanix.com> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: Rich Ercolani <rincebrain@gmail.com> Signed-off-by: Pawel Jakub Dawidek <pawel@dawidek.net> Closes #13392
2023-03-10 19:59:53 +00:00
extern uint64_t brt_get_dspace(spa_t *spa);
extern uint64_t brt_get_used(spa_t *spa);
extern uint64_t brt_get_saved(spa_t *spa);
extern uint64_t brt_get_ratio(spa_t *spa);
extern boolean_t brt_maybe_exists(spa_t *spa, const blkptr_t *bp);
extern void brt_init(void);
extern void brt_fini(void);
extern void brt_pending_add(spa_t *spa, const blkptr_t *bp, dmu_tx_t *tx);
extern void brt_pending_remove(spa_t *spa, const blkptr_t *bp, dmu_tx_t *tx);
extern void brt_pending_apply(spa_t *spa, uint64_t txg);
extern void brt_create(spa_t *spa);
extern int brt_load(spa_t *spa);
extern void brt_unload(spa_t *spa);
extern void brt_sync(spa_t *spa, uint64_t txg);
#ifdef __cplusplus
}
#endif
#endif /* _SYS_BRT_H */