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# Traffic shaper sub-class
# **** 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::HFSCClass;
use strict;
use warnings;
require Vyatta::Config;
use Vyatta::Qos::Match;
use Vyatta::Qos::Util qw/getDsfield getTime getRate/;
sub new {
my ( $that, $config, $id ) = @_;
my $class = ref($that) || $that;
my $self = {};
$self->{id} = $id;
bless $self, $class;
if ($config) {
my $level = $config->setLevel();
$self->{level} = $level;
my @matches = _getMatch("$level match");
# HFSC service curves
$self->{_linkshare} = ();
$self->{_realtime} = ();
$self->{_upperlimit} = ();
# Populate services curves using configuration
foreach my $sc (qw(linkshare realtime upperlimit)) {
foreach my $type (qw(m1 m2)) {
$self->{'_' . $sc}{$type} = $config->returnValue($sc . ' ' . $type);
}
my $delay = $config->returnValue($sc . ' d');
$self->{'_' . $sc}{d} = getTime($delay) if ($delay);
}
$self->{_match} = \@matches;
}
return $self;
}
sub _getMatch {
my $level = shift;
my @matches;
my $config = new Vyatta::Config;
foreach my $match ( $config->listNodes($level) ) {
$config->setLevel("$level $match");
my $match = new Vyatta::Qos::Match($config);
if (defined($match)) {
push @matches, $match;
}
}
return @matches;
}
sub matchRules {
my ($self) = @_;
my $matches = $self->{_match};
return @$matches;
}
sub _getPercentRate {
my ( $rate, $speed ) = @_;
return unless defined $rate;
# Rate might be a percentage of speed
if ( $rate =~ /%$/ ) {
my $percent = substr( $rate, 0, length($rate) - 1 );
if ( $percent < 0 || $percent > 100 ) {
die "Invalid percentage bandwidth: $percent\n";
}
return ( $percent * $speed ) / 100.;
}
return getRate($rate);
}
# Check rate configuration (%age or absolute values)
sub rateCheck {
my ( $self, $ifspeed, $level ) = @_;
# We need at least one M2 to be set
if(!(defined $self->{_linkshare}{m2} || defined $self->{_realtime}{m2} || defined $self->{_upperlimit}{m2})) {
print STDERR "Configuration error in: $level\n";
print STDERR "At least one m2 value needs to be set";
exit 1;
}
# Linkshare (or servicecurve) must be defined to use upperlimit
if(defined $self->{_upperlimit}{m2} && !defined $self->{_linkshare}{m2}) {
print STDERR "Configuration error in: $level\n";
print STDERR "Linkshare m2 needs to be defined to use upperlimit m2";
exit 1;
}
# Check that each m2 rate is below interface rate
foreach my $sc (qw(linkshare realtime upperlimit)) {
my $rate = _getPercentRate($self->{'_' . $sc}{m2}, $ifspeed);
if(defined $rate && $rate > $ifspeed) {
print STDERR "Configuration error in: $level\n";
printf STDERR "$sc m2 value (%dKbps) must be less than the bw for the policy (%dKbps)", $rate / 1000, $ifspeed / 1000;
exit 1;
}
}
# Same with m1 values, check that we have a matching m2 value and a valid d value
foreach my $sc (qw(linkshare realtime upperlimit)) {
if(defined $self->{'_' . $sc}{m1}) {
# m1 is set, we need a matching m2 value
if(!defined $self->{'_' . $sc}{m2}) {
print STDERR "Configuration error in :$level\n";
print STDERR "$sc m1 value is set, but no m2 was found !";
exit 1;
}
# m1 is set, we need a matching d value
if(!defined $self->{'_' . $sc}{d}) {
print STDERR "Configuration error in :$level\n";
print STDERR "$sc m1 value is set, but no d was found !";
exit 1;
}
}
my $rate = _getPercentRate($self->{'_' . $sc}{m1}, $ifspeed);
if(defined $rate && $rate > $ifspeed) {
print STDERR "Configuration error in: $level\n";
printf STDERR "$sc m1 value (%dKbps) must be less than the bw for the policy (%dKbps)", $rate / 1000, $ifspeed / 1000;
exit 1;
}
}
}
sub get_rate {
my ( $self, $speed ) = @_;
return _getPercentRate( $self->{_rate}, $speed );
}
sub gen_class {
my ( $self, $dev, $qdisc, $parent, $speed ) = @_;
printf "class add dev %s parent %x:1 classid %x:%x hfsc",
$dev, $parent, $parent, $self->{id};
my $ret = '';
# format : 'ul m1 Xbit d Yms m2 Xbit rt m2 Xbit'
foreach my $sc (qw(linkshare upperlimit realtime)) {
# Translate long service curves names to short ones
my %sc_short = (
'linkshare' => 'ls',
'upperlimit' => 'ul',
'realtime' => 'rt');
if(defined $self->{'_' . $sc}{m2}) { # We have an m2 value, add curve to hfsc class
$ret .= ' ' . $sc_short{$sc} . ' ';
if(defined $self->{'_' . $sc}{m1} && defined $self->{'_' . $sc}{d}) { # We have m1 and d value, define curve
$ret .= 'm1 ' . _getPercentRate($self->{'_' . $sc}{m1}, $speed) . ' d ' . $self->{'_' . $sc}{d} . ' ';
}
$ret .= 'm2 ' . _getPercentRate($self->{'_' . $sc}{m2}, $speed);
}
}
print $ret;
print "\n";
# Add SFQ qdisc
printf "qdisc add dev %s parent %x:%x handle f%x: sfq perturb 10",
$dev, $parent, $self->{id}, $self->{id};
print "\n";
}
1;
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