1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
|
# 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::ShaperClass;
use strict;
use warnings;
require Vyatta::Config;
use Vyatta::Qos::Match;
use Vyatta::Qos::Util qw/getDsfield getRate/;
my %fields = (
id => undef,
dsmark => undef,
_priority => undef,
_rate => undef,
_ceiling => undef,
_burst => undef,
_match => undef,
_limit => undef,
_qdisc => undef,
);
sub new {
my ( $that, $config, $id ) = @_;
my $class = ref($that) || $that;
my $self = {%fields};
$self->{id} = $id;
bless $self, $class;
$self->_define($config);
return $self;
}
sub _define {
my ( $self, $config ) = @_;
my $level = $config->setLevel();
my @matches = ();
$self->{_rate} = $config->returnValue("bandwidth");
defined $self->{_rate} or die "$level bandwidth not defined\n";
$self->{_priority} = $config->returnValue("priority");
$self->{_ceiling} = $config->returnValue("ceiling");
$self->{_burst} = $config->returnValue("burst");
$self->{_limit} = $config->returnValue("queue-limit");
$self->{_qdisc} = $config->returnValue("queue-type");
$self->{dsmark} = getDsfield( $config->returnValue("set-dscp") );
foreach my $match ( $config->listNodes("match") ) {
$config->setLevel("$level match $match");
push @matches, new Vyatta::Qos::Match($config);
}
$self->{_match} = \@matches;
}
sub matchRules {
my ($self) = @_;
my $matches = $self->{_match};
return @$matches;
}
sub _getPercentRate {
my ( $rate, $speed ) = @_;
if ( !defined $rate ) {
return; # leave rate undef
}
# 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";
}
$rate = ( $percent * $speed ) / 100.;
}
else {
$rate = getRate($rate);
}
return $rate;
}
sub rateCheck {
my ( $self, $limit, $level ) = @_;
my $rate = _getPercentRate( $self->{_rate}, $limit );
if ( $rate > $limit ) {
print STDERR "Configuration error in: $level\n";
printf STDERR
"The bandwidth reserved for this class (%dKbps) must be less than\n",
$rate / 1000;
printf STDERR "the bandwidth for the overall policy (%dKbps)\n",
$limit / 1000;
exit 1;
}
my $ceil = _getPercentRate( $self->{_ceiling}, $limit );
if ( defined $ceil && $ceil < $rate ) {
print STDERR "Configuration error in: $level\n";
printf STDERR
"The bandwidth ceiling for this class (%dKbps) must be greater or equal to\n",
$ceil / 1000;
printf STDERR "the reserved bandwidth for the class (%dKbps)\n",
$rate / 1000;
exit 1;
}
}
sub prioQdisc {
my ( $self, $dev, $rate ) = @_;
my $prio_id = 0x4000 + $self->{id};
my $limit = $self->{_limit};
printf "handle %x: prio\n", $prio_id;
if ($limit) {
foreach my $i (qw/1 2 3/) {
printf "qdisc add dev %s parent %x:%d pfifo limit %d\n",
$dev, $prio_id, $i, $limit;
}
}
}
sub sfqQdisc {
my ( $self, $dev, $rate ) = @_;
print "sfq";
print " limit $self->{_limit}" if ( $self->{_limit} );
print "\n";
}
sub fifoQdisc {
my ( $self, $dev, $rate ) = @_;
print "pfifo";
print " limit $self->{_limit}" if ( $self->{_limit} );
print "\n";
}
# Red is has way to many configuration options
# make some assumptions to make this sane (based on LARTC)
# average size := 1000 bytes
# limit := queue-limit * average
# max := limit / 8
# min := max / 3
# burst := (2 * min + max) / (3 * average)
sub redQdisc {
my ( $self, $dev, $rate ) = @_;
my $limit = $self->{_limit};
my $avg = 1000;
my $qlimit;
if ( defined $limit ) {
$qlimit = $limit * $avg; # red limit in bytes
}
else {
# rate is in bits/sec so queue-limit = 8 * 500ms * rate
$qlimit = $rate / 2;
}
my $qmax = $qlimit / 8;
my $qmin = $qmax / 3;
printf "red limit %d min %d max %d avpkt %d",
$qlimit, $qmin, $qmax, $avg;
printf " burst %d probability 0.02 bandwidth %d ecn\n",
( 2 * $qmin + $qmax ) / ( 3 * $avg ), $rate / 1000;
}
my %qdiscOptions = (
'priority' => \&prioQdisc,
'fair-queue' => \&sfqQdisc,
'random-detect' => \&redQdisc,
'drop-tail' => \&fifoQdisc,
);
sub htbClass {
my ( $self, $dev, $parent, $speed ) = @_;
my $rate = _getPercentRate( $self->{_rate}, $speed );
my $ceil = _getPercentRate( $self->{_ceiling}, $speed );
printf "class add dev %s parent %x:1 classid %x:%x htb rate %s",
$dev, $parent, $parent, $self->{id}, $rate;
print " ceil $ceil" if ($ceil);
print " burst $self->{_burst}" if ( defined $self->{_burst} );
print " prio $self->{_priority}" if ( defined $self->{_priority} );
print "\n";
# create leaf qdisc
my $q = $qdiscOptions{ $self->{_qdisc} };
if ( defined $q ) {
printf "qdisc add dev %s parent %x:%x ",
$dev, $parent, $self->{id};
$q->( $self, $dev, $rate );
}
else {
die "Unknown queue type $self->{_qdisc}\n";
}
}
sub dsmarkClass {
my ( $self, $parent, $dev ) = @_;
printf "class change dev %s classid %x:%x dsmark",
$dev, $parent, $self->{id};
if ( $self->{dsmark} ) {
print " mask 0 value $self->{dsmark}\n";
}
else {
print " mask 0xff value 0\n";
}
}
1;
|
