[pve-devel] [PATCH v3 guest-common 2/2] snapshots: delete parent property if new snapshot name is already a parent to existing one

[Oguz Bektas <o.bektas@proxmox.com>]

Signed-off-by: Oguz Bektas <o.bektas@proxmox.com>
---
v2->v3:
* automatically delete the 'parent' property for an existing snapshot
(instead of aborting) if its the same as the new snapshot name (and the
snapshot referenced by 'parent' is not used)



 src/PVE/AbstractConfig.pm | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/src/PVE/AbstractConfig.pm b/src/PVE/AbstractConfig.pm
index 3348d8a..e4ddeab 100644
--- a/src/PVE/AbstractConfig.pm
+++ b/src/PVE/AbstractConfig.pm
@@ -721,14 +721,21 @@ sub __snapshot_prepare {
 
 	$conf->{lock} = 'snapshot';
 
+	my $snapshots = $conf->{snapshots};
+
 	die "snapshot name '$snapname' already used\n"
-	    if defined($conf->{snapshots}->{$snapname});
+	    if defined($snapshots->{$snapname});
 
 	my $storecfg = PVE::Storage::config();
 	die "snapshot feature is not available\n"
 	    if !$class->has_feature('snapshot', $conf, $storecfg, undef, undef, $snapname eq 'vzdump');
 
-	$snap = $conf->{snapshots}->{$snapname} = {};
+	foreach my $existing_snapshot (keys %$snapshots) {
+	    my $parent_name = $snapshots->{$existing_snapshot}->{parent} // '';
+	    delete $snapshots->{$existing_snapshot}->{parent} if $snapname eq $parent_name;
+	}
+
+	$snap = $snapshots->{$snapname} = {};
 
 	if ($save_vmstate && $class->__snapshot_check_running($vmid)) {
 	    $class->__snapshot_save_vmstate($vmid, $conf, $snapname, $storecfg);
-- 
2.30.2