[PATCH pve-cluster v3 31/39] cluster: move pvecfg node version helpers from qemu-server

[Lukas Wagner <l.wagner@proxmox.com>]

From: Fiona Ebner <f.ebner@proxmox.com>

For the pvecfg version helpers, add a node_pvecfg_version_at_least()
function for convenience.

In preparation to check the node version for container migration and
from HA manager too.

Signed-off-by: Fiona Ebner <f.ebner@proxmox.com>
---

Notes:
    New in v3, cherry-picked from
    
    https://lore.proxmox.com/pve-devel/20260918160841.128088-1-f.ebner@proxmox.com/

 src/PVE/Cluster.pm | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/src/PVE/Cluster.pm b/src/PVE/Cluster.pm
index 034b78c..784ea02 100644
--- a/src/PVE/Cluster.pm
+++ b/src/PVE/Cluster.pm
@@ -929,4 +929,34 @@ sub cfs_rename_db_unsafe {
     rename $dbfile, "$dbfile.$ctime.bak" or warn "failed to rename old config database - $!\n";
 }
 
+sub get_node_pvecfg_version {
+    my ($node) = @_;
+
+    my $nodes_version_info = get_node_kv('version-info', $node);
+    return if !$nodes_version_info->{$node};
+
+    my $version_info = decode_json($nodes_version_info->{$node});
+    return $version_info->{version};
+}
+
+sub pvecfg_min_version {
+    my ($verstr, $major, $minor, $release) = @_;
+
+    return 0 if !$verstr;
+
+    if ($verstr =~ m/^(\d+)\.(\d+)(?:[.-](\d+))?/) {
+        return 1 if PVE::Tools::version_cmp($1, $major, $2, $minor, $3 // 0, $release) >= 0;
+        return 0;
+    }
+
+    die "internal error: cannot check version of invalid string '$verstr'";
+}
+
+sub node_pvecfg_version_at_least {
+    my ($node, $major, $minor, $release) = @_;
+
+    my $version = get_node_pvecfg_version($node);
+    return $version && pvecfg_min_version($version, $major, $minor, $release);
+}
+
 1;
-- 
2.47.3