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#!/usr/bin/perl
# **** 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 ****
use lib "/opt/vyatta/share/perl5/";
use VyattaConfig;
use strict;
use Getopt::Long;
my $debug = $ENV{'QOS_DEBUG'};
my $check = undef;
my @updateInterface = ();
my @deleteInterface = ();
my $listPolicy = undef;
my $deletePolicy = undef;
my @createPolicy = ();
my @updatePolicy = ();
GetOptions(
"check" => \$check,
"update-interface=s{3}" => \@updateInterface,
"delete-interface=s{2}" => \@deleteInterface,
"list-policy" => \$listPolicy,
"delete-policy=s" => \$deletePolicy,
"create-policy=s{2}" => \@createPolicy,
"update-policy=s{2}" => \@updatePolicy,
);
# class factory for policies
# TODO use hierarcy (ie VyattaQos::TrafficShaper)
# and reference to object, not string dynamic binding
my %policies = (
'traffic-shaper' => "VyattaQosTrafficShaper",
'fair-queue' => "VyattaQosFairQueue",
);
use VyattaQosTrafficShaper;
use VyattaQosFairQueue;
sub make_policy {
my ($config, $type, $name) = @_;
my $class = $policies{$type};
# This means template exists but we don't know what it is.
defined $class or die "Unknown policy type $type";
$config->setLevel("qos-policy $type $name");
return $class->new($config, $name);
}
## list defined qos policy names
sub list_policy {
my $config = new VyattaConfig;
my @nodes = ();
$config->setLevel('qos-policy');
foreach my $type ( $config->listNodes() ) {
foreach my $name ( $config->listNodes($type) ) {
push @nodes, $name;
}
}
print join( ' ', @nodes ), "\n";
}
## delete_interface('eth0', 'out')
# remove all filters and qdisc's
sub delete_interface {
my ($interface, $direction ) = @_;
if ($direction eq "out" ) {
# delete old qdisc - will give error if no policy in place
qx(sudo /sbin/tc qdisc del dev "$interface" root 2>/dev/null);
}
}
## update_interface('eth0', 'out', 'my-shaper')
# update policy to interface
sub update_interface {
my ($interface, $direction, $name ) = @_;
my $config = new VyattaConfig;
( $direction eq "out" ) or die "Only out direction supported";
$config->setLevel('qos-policy');
foreach my $type ( $config->listNodes() ) {
if ( $config->exists("$type $name") ) {
my $shaper = make_policy($config, $type, $name);
# Remove old policy
delete_interface($interface, $direction);
# When doing debugging just echo the commands
my $out;
if (defined $debug) {
open $out, '>-'
or die "can't open stdout: $!";
} else {
open $out, "|-" or exec qw:sudo /sbin/tc -batch -:
or die "Tc setup failed: $!\n";
}
$shaper->commands($out, $interface);
if (! close $out && ! defined $debug) {
# cleanup any partial commands
delete_interface($interface, $direction);
# replay commands to stdout
open $out, '>-';
$shaper->commands($out, $interface);
close $out;
die "TC command failed.";
}
exit 0;
}
}
die "Unknown qos-policy $name\n";
}
sub delete_policy {
my ($name) = @_;
my $config = new VyattaConfig;
$config->setLevel("interfaces ethernet");
foreach my $interface ( $config->listNodes() ) {
foreach my $direction ( $config->listNodes("$interface qos-policy") ) {
if ($config->returnValue("$interface qos-policy $direction") eq $name) {
# can't delete active policy
die "Qos policy $name still in use on ethernet $interface $direction\n";
}
}
}
}
sub check_conflict {
my $config = new VyattaConfig;
my %other = ();
$config->setLevel("qos-policy");
foreach my $type ( $config->listNodes() ) {
foreach my $name ( $config->listNodes($type) ) {
my $conflict = $other{$name};
die "Policy $name used by $conflict and $type\n" if ($conflict);
$other{$name} = $type;
}
}
}
sub create_policy {
my ($shaper, $name) = @_;
my $config = new VyattaConfig;
# Syntax check
make_policy($config, $shaper, $name);
}
sub update_policy {
my ($shaper, $name) = @_;
my $config = new VyattaConfig;
# Syntax check
make_policy($config, $shaper, $name);
$config->setLevel("interfaces ethernet");
foreach my $interface ( $config->listNodes() ) {
foreach my $direction ( $config->listNodes("$interface qos-policy") ) {
if ($config->returnValue("$interface qos-policy $direction") eq $name) {
update_interface($interface, $direction, $name);
}
}
}
}
if ($check) {
check_conflict();
exit 0;
}
if ( $listPolicy ) {
list_policy();
exit 0;
}
if ( $#deleteInterface == 1 ) {
delete_interface(@deleteInterface);
exit 0;
}
if ( $#updateInterface == 2 ) {
update_interface(@updateInterface);
exit 0;
}
if ( $#createPolicy == 1) {
create_policy(@createPolicy);
exit 0;
}
if ( $#updatePolicy == 1) {
update_policy(@updatePolicy);
exit 0;
}
if ( $deletePolicy ) {
delete_policy($deletePolicy);
exit 0;
}
print <<EOF;
usage: vyatta-qos.pl --check
vyatta-qos.pl --list-policy
vyatta-qos.pl --create-policy policy-type policy-name
vyatta-qos.pl --delete-policy policy-name
vyatta-qos.pl --update-policy policy-type policy-name
vyatta-qos.pl --update-interface interface direction policy-name
vyatta-qos.pl --delete-interface interface direction
EOF
exit 1;
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