btrfs: support newer prune-backups for backup retention

Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>

diff --git a/PVE/Storage/BTRFSPlugin.pm b/PVE/Storage/BTRFSPlugin.pm
index d3ab17cf61b811edd72cf8971fd1087b5f77dd19..09b38a2405716d66c6365ffddef4b3f149bde99e 100644 (file)
--- a/PVE/Storage/BTRFSPlugin.pm
+++ b/PVE/Storage/BTRFSPlugin.pm
@@ -67,6 +67,7 @@ sub options {
        shared => { optional => 1 },
        disable => { optional => 1 },
        maxfiles => { optional => 1 },
+       'prune-backups'=> { optional => 1 },
        content => { optional => 1 },
        format => { optional => 1 },
        is_mountpoint => { optional => 1 },