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Redacted send/receive allows users to send subsets of their data to a target system. One possible use case for this feature is to not transmit sensitive information to a data warehousing, test/dev, or analytics environment. Another is to save space by not replicating unimportant data within a given dataset, for example in backup tools like zrepl. Redacted send/receive is a three-stage process. First, a clone (or clones) is made of the snapshot to be sent to the target. In this clone (or clones), all unnecessary or unwanted data is removed or modified. This clone is then snapshotted to create the "redaction snapshot" (or snapshots). Second, the new zfs redact command is used to create a redaction bookmark. The redaction bookmark stores the list of blocks in a snapshot that were modified by the redaction snapshot(s). Finally, the redaction bookmark is passed as a parameter to zfs send. When sending to the snapshot that was redacted, the redaction bookmark is used to filter out blocks that contain sensitive or unwanted information, and those blocks are not included in the send stream. When sending from the redaction bookmark, the blocks it contains are considered as candidate blocks in addition to those blocks in the destination snapshot that were modified since the creation_txg of the redaction bookmark. This step is necessary to allow the target to rehydrate data in the case where some blocks are accidentally or unnecessarily modified in the redaction snapshot. The changes to bookmarks to enable fast space estimation involve adding deadlists to bookmarks. There is also logic to manage the life cycles of these deadlists. The new size estimation process operates in cases where previously an accurate estimate could not be provided. In those cases, a send is performed where no data blocks are read, reducing the runtime significantly and providing a byte-accurate size estimate. Reviewed-by: Dan Kimmel <dan.kimmel@delphix.com> Reviewed-by: Matt Ahrens <mahrens@delphix.com> Reviewed-by: Prashanth Sreenivasa <pks@delphix.com> Reviewed-by: John Kennedy <john.kennedy@delphix.com> Reviewed-by: George Wilson <george.wilson@delphix.com> Reviewed-by: Chris Williamson <chris.williamson@delphix.com> Reviewed-by: Pavel Zhakarov <pavel.zakharov@delphix.com> Reviewed-by: Sebastien Roy <sebastien.roy@delphix.com> Reviewed-by: Prakash Surya <prakash.surya@delphix.com> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Paul Dagnelie <pcd@delphix.com> Closes #7958
139 lines
4.8 KiB
C
139 lines
4.8 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) 2012, 2018 by Delphix. All rights reserved.
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* Copyright (c) 2017 Datto Inc.
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* Copyright 2017 RackTop Systems.
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* Copyright (c) 2017 Open-E, Inc. All Rights Reserved.
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*/
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#ifndef _LIBZFS_CORE_H
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#define _LIBZFS_CORE_H
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#include <libnvpair.h>
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#include <sys/param.h>
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#include <sys/types.h>
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#include <sys/fs/zfs.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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int libzfs_core_init(void);
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void libzfs_core_fini(void);
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/*
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* NB: this type should be kept binary compatible with dmu_objset_type_t.
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*/
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enum lzc_dataset_type {
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LZC_DATSET_TYPE_ZFS = 2,
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LZC_DATSET_TYPE_ZVOL
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};
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int lzc_remap(const char *fsname);
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int lzc_snapshot(nvlist_t *, nvlist_t *, nvlist_t **);
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int lzc_create(const char *, enum lzc_dataset_type, nvlist_t *, uint8_t *,
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uint_t);
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int lzc_clone(const char *, const char *, nvlist_t *);
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int lzc_promote(const char *, char *, int);
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int lzc_destroy_snaps(nvlist_t *, boolean_t, nvlist_t **);
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int lzc_bookmark(nvlist_t *, nvlist_t **);
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int lzc_get_bookmarks(const char *, nvlist_t *, nvlist_t **);
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int lzc_get_bookmark_props(const char *, nvlist_t **);
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int lzc_destroy_bookmarks(nvlist_t *, nvlist_t **);
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int lzc_load_key(const char *, boolean_t, uint8_t *, uint_t);
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int lzc_unload_key(const char *);
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int lzc_change_key(const char *, uint64_t, nvlist_t *, uint8_t *, uint_t);
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int lzc_initialize(const char *, pool_initialize_func_t, nvlist_t *,
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nvlist_t **);
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int lzc_trim(const char *, pool_trim_func_t, uint64_t, boolean_t,
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nvlist_t *, nvlist_t **);
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int lzc_redact(const char *, const char *, nvlist_t *);
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int lzc_snaprange_space(const char *, const char *, uint64_t *);
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int lzc_hold(nvlist_t *, int, nvlist_t **);
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int lzc_release(nvlist_t *, nvlist_t **);
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int lzc_get_holds(const char *, nvlist_t **);
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enum lzc_send_flags {
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LZC_SEND_FLAG_EMBED_DATA = 1 << 0,
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LZC_SEND_FLAG_LARGE_BLOCK = 1 << 1,
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LZC_SEND_FLAG_COMPRESS = 1 << 2,
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LZC_SEND_FLAG_RAW = 1 << 3,
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};
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int lzc_send(const char *, const char *, int, enum lzc_send_flags);
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int lzc_send_resume(const char *, const char *, int,
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enum lzc_send_flags, uint64_t, uint64_t);
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int lzc_send_space(const char *, const char *, enum lzc_send_flags, uint64_t *);
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struct dmu_replay_record;
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int lzc_send_redacted(const char *, const char *, int, enum lzc_send_flags,
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const char *);
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int lzc_send_resume_redacted(const char *, const char *, int,
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enum lzc_send_flags, uint64_t, uint64_t, const char *);
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int lzc_receive(const char *, nvlist_t *, const char *, boolean_t, boolean_t,
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int);
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int lzc_receive_resumable(const char *, nvlist_t *, const char *, boolean_t,
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boolean_t, int);
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int lzc_receive_with_header(const char *, nvlist_t *, const char *, boolean_t,
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boolean_t, boolean_t, int, const struct dmu_replay_record *);
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int lzc_receive_one(const char *, nvlist_t *, const char *, boolean_t,
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boolean_t, boolean_t, int, const struct dmu_replay_record *, int,
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uint64_t *, uint64_t *, uint64_t *, nvlist_t **);
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int lzc_receive_with_cmdprops(const char *, nvlist_t *, nvlist_t *,
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uint8_t *, uint_t, const char *, boolean_t, boolean_t, boolean_t, int,
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const struct dmu_replay_record *, int, uint64_t *, uint64_t *,
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uint64_t *, nvlist_t **);
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int lzc_send_space(const char *, const char *, enum lzc_send_flags, uint64_t *);
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int lzc_send_space_resume_redacted(const char *, const char *,
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enum lzc_send_flags, uint64_t, uint64_t, uint64_t, const char *,
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int, uint64_t *);
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uint64_t lzc_send_progress(int);
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boolean_t lzc_exists(const char *);
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int lzc_rollback(const char *, char *, int);
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int lzc_rollback_to(const char *, const char *);
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int lzc_rename(const char *, const char *);
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int lzc_destroy(const char *);
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int lzc_channel_program(const char *, const char *, uint64_t,
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uint64_t, nvlist_t *, nvlist_t **);
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int lzc_channel_program_nosync(const char *, const char *, uint64_t,
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uint64_t, nvlist_t *, nvlist_t **);
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int lzc_sync(const char *, nvlist_t *, nvlist_t **);
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int lzc_reopen(const char *, boolean_t);
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int lzc_pool_checkpoint(const char *);
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int lzc_pool_checkpoint_discard(const char *);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _LIBZFS_CORE_H */
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