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zfs list: Allow more fields in ZFS_ITER_SIMPLE mode

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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.

Reviewed-by: Mark Maybee <mark.maybee@delphix.com>
Reviewed-by: Ryan Moeller <ryan@iXsystems.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Pawel Jakub Dawidek <pawel@dawidek.net>
Signed-off-by: Allan Jude <allan@klarasystems.com>
Closes #11080
This commit is contained in:
Allan Jude
2021-12-16 14:56:22 -05:00
committed by GitHub
parent 2300621dc7
commit f6a0dac84a
14 changed files with 189 additions and 95 deletions
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module/zfs/zfs_ioctl.c
+2 -1
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@@ -2044,7 +2044,7 @@ zfs_ioc_objset_stats_impl(zfs_cmd_t *zc, objset_t *os)
dmu_objset_fast_stat(os, &zc->zc_objset_stats);
if (zc->zc_nvlist_dst != 0 &&
if (!zc->zc_simple && zc->zc_nvlist_dst != 0 &&
(error = dsl_prop_get_all(os, &nv)) == 0) {
dmu_objset_stats(os, nv);
/*
@@ -2331,6 +2331,7 @@ zfs_ioc_snapshot_list_next(zfs_cmd_t *zc)
}
if (zc->zc_simple) {
dsl_dataset_fast_stat(ds, &zc->zc_objset_stats);
dsl_dataset_rele(ds, FTAG);
break;
}