[pve-devel] [PATCH storage] prune {validate, mark}: preserve input parameter

[Fabian Ebner]

While the current way to detect settings like { 'keep-last' => 0 } is
concise, it's also wrong, because but the delete operation is visible
to the caller. This resulted in e.g.
    # $hash is { 'keep-all' => 1 }
    my $s = print_property_string($hash, 'prune-backups');
    # $hash is now {}, $s is 'keep-all=1'
because validation is called in print_property_string. The same issue
is present when calling prune_mark_backup_group.

Because validation complains when keep-all and something else is set,
this shouldn't have caused any real issues, besides vzdump with
keep-all=1 wrongly taking the removal path, but without any settings,
so not removing anything:
    INFO: prune older backups with retention: 
    INFO: pruned 0 backup(s)

Signed-off-by: Fabian Ebner <f.ebner at proxmox.com>
---
 PVE/Storage.pm        | 5 ++---
 PVE/Storage/Plugin.pm | 7 ++++---
 2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/PVE/Storage.pm b/PVE/Storage.pm
index c04b5a2..7b319fe 100755
--- a/PVE/Storage.pm
+++ b/PVE/Storage.pm
@@ -1666,10 +1666,9 @@ my $prune_mark = sub {
 sub prune_mark_backup_group {
     my ($backup_group, $keep) = @_;
 
-    my $keep_all = delete $keep->{'keep-all'};
+    my @positive_opts = grep { $_ ne 'keep-all' && $keep->{$_} > 0 } keys $keep->%*;
 
-    if ($keep_all || !scalar(grep {$_ > 0} values %{$keep})) {
-	$keep = { 'keep-all' => 1 } if $keep_all;
+    if ($keep->{'keep-all'} || scalar(@positive_opts) == 0) {
 	foreach my $prune_entry (@{$backup_group}) {
 	    $prune_entry->{mark} = 'keep';
 	}
diff --git a/PVE/Storage/Plugin.pm b/PVE/Storage/Plugin.pm
index b1865cb..870091d 100644
--- a/PVE/Storage/Plugin.pm
+++ b/PVE/Storage/Plugin.pm
@@ -93,11 +93,12 @@ PVE::JSONSchema::register_format('prune-backups', $prune_backups_format, \&valid
 sub validate_prune_backups {
     my ($prune_backups) = @_;
 
-    my $keep_all = delete $prune_backups->{'keep-all'};
+    my @positive_opts =
+	grep { $_ ne 'keep-all' && $prune_backups->{$_} > 0 } keys $prune_backups->%*;
 
-    if (!scalar(grep {$_ > 0} values %{$prune_backups})) {
+    if (scalar(@positive_opts) == 0) {
 	$prune_backups = { 'keep-all' => 1 };
-    } elsif ($keep_all) {
+    } elsif ($prune_backups->{'keep-all'}) {
 	die "keep-all cannot be set together with other options.\n";
     }
 
-- 
2.30.2