[pve-devel] [PATCH v2 qemu-server 1/6] config: add pool usage helper

[Fabian Grünbichler]

determining the usage values for the current config. pending values are taken
into account if they are higher than the current value only, else it would be
possible to easily circumvent config limits by setting non-hotpluggable pending
values.

Signed-off-by: Fabian Grünbichler <f.gruenbichler at proxmox.com>
---
 PVE/QemuConfig.pm | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/PVE/QemuConfig.pm b/PVE/QemuConfig.pm
index 8e8a7828..1410bf14 100644
--- a/PVE/QemuConfig.pm
+++ b/PVE/QemuConfig.pm
@@ -573,4 +573,34 @@ sub has_cloudinit {
     return $found;
 }
 
+# for determining pool usage vs limits
+#
+# this gives the higher of pending or currently configured
+sub get_pool_usage {
+    my ($class, $conf) = @_;
+
+    my $usage = {};
+
+    my $get_max = sub {
+	my $max = 0;
+
+	for my $curr (@_) {
+	    $max = $curr if defined($curr) && $curr > $max;
+	}
+
+	return $max;
+    };
+
+    $usage->{sockets} = $get_max->($conf->{pending}->{sockets}, $conf->{sockets}, 1);
+    $usage->{cores} = $get_max->($conf->{pending}->{cores}, $conf->{cores}, 1);
+    $usage->{cpu} = $usage->{sockets} * $usage->{cores};
+    $usage->{mem} = $get_max->(
+	get_current_memory($conf->{pending}->{memory}),
+	get_current_memory($conf->{memory})
+    );
+    $usage->{mem} *= 1024*1024;
+
+    return $usage;
+}
+
 1;
-- 
2.39.2