67a1b03791
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
60 lines
2.2 KiB
C
60 lines
2.2 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) 2010, Oracle and/or its affiliates. All rights reserved.
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*/
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#ifndef _SYS_FS_ZFS_VNOPS_H
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#define _SYS_FS_ZFS_VNOPS_H
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#include <sys/zfs_vnops_os.h>
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extern int zfs_fsync(znode_t *, int, cred_t *);
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extern int zfs_read(znode_t *, zfs_uio_t *, int, cred_t *);
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extern int zfs_write(znode_t *, zfs_uio_t *, int, cred_t *);
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extern int zfs_holey(znode_t *, ulong_t, loff_t *);
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extern int zfs_access(znode_t *, int, int, cred_t *);
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extern int zfs_clone_range(znode_t *, uint64_t *, znode_t *, uint64_t *,
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uint64_t *, cred_t *);
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extern int zfs_clone_range_replay(znode_t *, uint64_t, uint64_t, uint64_t,
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const blkptr_t *, size_t);
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extern int zfs_getsecattr(znode_t *, vsecattr_t *, int, cred_t *);
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extern int zfs_setsecattr(znode_t *, vsecattr_t *, int, cred_t *);
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extern int mappedread(znode_t *, int, zfs_uio_t *);
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extern int mappedread_sf(znode_t *, int, zfs_uio_t *);
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extern void update_pages(znode_t *, int64_t, int, objset_t *);
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/*
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* Platform code that asynchronously drops zp's inode / vnode_t.
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*
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* Asynchronous dropping ensures that the caller will never drop the
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* last reference on an inode / vnode_t in the current context.
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* Doing so while holding open a tx could result in a deadlock if
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* the platform calls into filesystem again in the implementation
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* of inode / vnode_t dropping (e.g. call from iput_final()).
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*/
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extern void zfs_zrele_async(znode_t *zp);
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extern zil_get_data_t zfs_get_data;
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#endif
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