1 files changed, 58 insertions, 0 deletions
diff --git a/lib/Vyatta/Qos/DropTail.pm b/lib/Vyatta/Qos/DropTail.pm
new file mode 100644
index 0000000..b8ef0b1
--- /dev/null
+++ b/lib/Vyatta/Qos/DropTail.pm
@@ -0,0 +1,58 @@
+# This is a wrapper around FIFO queue discipline
+#
+#
+# **** License ****
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 as
+# published by the Free Software Foundation.
+# 
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# General Public License for more details.
+# 
+# This code was originally developed by Vyatta, Inc.
+# Portions created by Vyatta are Copyright (C) 2008 Vyatta, Inc.
+# All Rights Reserved.
+# **** End License ****
+
+package Vyatta::Qos::DropTail;
+
+use strict;
+use warnings;
+
+require VyattaConfig;
+
+my %fields = (
+    _limit	=> undef,
+);
+
+sub new {
+    my ( $that, $config ) = @_;
+    my $level = $config->setLevel();
+    my $class = ref($that) || $that;
+    my $self = {%fields};
+
+    $self->{_limit}  = $config->returnValue("queue-limit");
+
+    return bless $self, $class;
+}
+
+sub commands {
+    my ( $self, $out, $dev ) = @_;
+    my $limit = $self->{_limit};
+    my $cmd = "qdisc add dev $dev root pfifo";
+
+    $cmd .= " limit $limit" if defined $limit;
+    printf {$out} "%s\n", $cmd;
+}
+
+sub isChanged {
+    my ($self, $name) = @_;
+    my $config = new VyattaConfig;
+
+    $config->setLevel("qos-policy drop-tail $name");
+    return $config->isChanged('queue-limit');
+}
+
+1;