add bash completion for content type

PVE/API2/Storage/Content.pm

@@ -34,6 +34,7 @@ __PACKAGE__->register_method ({
 		description => "Only list content of this type.",
 		type => 'string', format => 'pve-storage-content',
 		optional => 1,
+		completion => \&PVE::Storage::complete_content_type,
 	    },
 	    vmid => get_standard_option
 		('pve-vmid', { 

PVE/API2/Storage/Status.pm

@@ -49,6 +49,7 @@ __PACKAGE__->register_method ({
 		description => "Only list stores which support this content type.",
 		type => 'string', format => 'pve-storage-content-list',
 		optional => 1,
+		completion => \&PVE::Storage::complete_content_type,
 	    },
 	    enabled => {
 		description => "Only list stores which are enabled (not disabled in config).",

PVE/Storage.pm

@@ -1228,4 +1228,10 @@ sub complete_storage_enabled {
     return $res;
 }
 
+sub complete_content_type {
+    my ($cmdname, $pname, $cvalue) = @_;
+
+    return [qw(rootdir images vztmpl iso backup)];
+}
+
 1;

PVE/Storage/Plugin.pm

@@ -27,6 +27,7 @@ my $defaultData = {
 	    description => "Allowed content types. Note: value 'rootdir' is used for Containers, and value 'images' for KVM-Qemu VM's.\n",
 	    type => 'string', format => 'pve-storage-content-list',
 	    optional => 1,
+	    completion => \&PVE::Storage::complete_content_type,
 	},
 	disable => {
 	    description => "Flag to disable the storage.",