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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
Download Patch File Download Diff File Expand all files Collapse all files
cmd/zfs/zfs_iter.c
+56 -8
View File
@@ -144,19 +144,20 @@ zfs_callback(zfs_handle_t *zhp, void *data)
(cb->cb_types &
(ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME))) &&
zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) {
(void) zfs_iter_filesystems(zhp, zfs_callback, data);
(void) zfs_iter_filesystems(zhp, cb->cb_flags,
zfs_callback, data);
}
if (((zfs_get_type(zhp) & (ZFS_TYPE_SNAPSHOT |
ZFS_TYPE_BOOKMARK)) == 0) && include_snaps) {
(void) zfs_iter_snapshots(zhp,
(cb->cb_flags & ZFS_ITER_SIMPLE) != 0,
(void) zfs_iter_snapshots(zhp, cb->cb_flags,
zfs_callback, data, 0, 0);
}
if (((zfs_get_type(zhp) & (ZFS_TYPE_SNAPSHOT |
ZFS_TYPE_BOOKMARK)) == 0) && include_bmarks) {
(void) zfs_iter_bookmarks(zhp, zfs_callback, data);
(void) zfs_iter_bookmarks(zhp, cb->cb_flags,
zfs_callback, data);
}
cb->cb_depth--;
@@ -212,11 +213,58 @@ zfs_free_sort_columns(zfs_sort_column_t *sc)
}
}
int
zfs_sort_only_by_name(const zfs_sort_column_t *sc)
/*
* Return true if all of the properties to be sorted are populated by
* dsl_dataset_fast_stat(). Note that sc == NULL (no sort) means we
* don't need any extra properties, so returns true.
*/
boolean_t
zfs_sort_only_by_fast(const zfs_sort_column_t *sc)
{
return (sc != NULL && sc->sc_next == NULL &&
sc->sc_prop == ZFS_PROP_NAME);
while (sc != NULL) {
switch (sc->sc_prop) {
case ZFS_PROP_NAME:
case ZFS_PROP_GUID:
case ZFS_PROP_CREATETXG:
case ZFS_PROP_NUMCLONES:
case ZFS_PROP_INCONSISTENT:
case ZFS_PROP_REDACTED:
case ZFS_PROP_ORIGIN:
break;
default:
return (B_FALSE);
}
sc = sc->sc_next;
}
return (B_TRUE);
}
boolean_t
zfs_list_only_by_fast(const zprop_list_t *p)
{
if (p == NULL) {
/* NULL means 'all' so we can't use simple mode */
return (B_FALSE);
}
while (p != NULL) {
switch (p->pl_prop) {
case ZFS_PROP_NAME:
case ZFS_PROP_GUID:
case ZFS_PROP_CREATETXG:
case ZFS_PROP_NUMCLONES:
case ZFS_PROP_INCONSISTENT:
case ZFS_PROP_REDACTED:
case ZFS_PROP_ORIGIN:
break;
default:
return (B_FALSE);
}
p = p->pl_next;
}
return (B_TRUE);
}
/* ARGSUSED */