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dc95911d21
If the fields to be listed and sorted by are constrained to those
populated by dsl_dataset_fast_stat(), then zfs list is much faster,
as it does not need to open each objset and reads its properties.
A previous optimization by Pawel Dawidek
(0cee24064a) took advantage
of this to make listing snapshot names sorted only by name much faster.
However, it was limited to `-o name -s name`, this work extends this
optimization to work with:
- name
- guid
- createtxg
- numclones
- inconsistent
- redacted
- origin
and could be further extended to any other properties supported by
dsl_dataset_fast_stat() or similar, that do not require extra locking
or reading from disk.
This was committed before (9a9e2e343dfa2af28bf7910de77ae73aa006de62),
but was reverted due to a regression when used with an older kernel.
If the kernel does not populate zc->zc_objset_stats, we now fallback
to getting the properties via the slower interface, to avoid problems
with newer userland and older kernels.
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Allan Jude <allan@klarasystems.com>
Closes #14110
55 lines
1.6 KiB
C
55 lines
1.6 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 2009 Sun Microsystems, Inc. All rights reserved.
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* Use is subject to license terms.
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* Copyright 2013 Nexenta Systems, Inc. All rights reserved.
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*/
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#ifndef ZFS_ITER_H
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#define ZFS_ITER_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef struct zfs_sort_column {
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struct zfs_sort_column *sc_next;
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struct zfs_sort_column *sc_last;
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zfs_prop_t sc_prop;
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char *sc_user_prop;
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boolean_t sc_reverse;
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} zfs_sort_column_t;
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int zfs_for_each(int, char **, int options, zfs_type_t,
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zfs_sort_column_t *, zprop_list_t **, int, zfs_iter_f, void *);
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int zfs_add_sort_column(zfs_sort_column_t **, const char *, boolean_t);
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void zfs_free_sort_columns(zfs_sort_column_t *);
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boolean_t zfs_sort_only_by_fast(const zfs_sort_column_t *);
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boolean_t zfs_list_only_by_fast(const zprop_list_t *);
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#ifdef __cplusplus
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}
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#endif
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#endif /* ZFS_ITER_H */
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