summaryrefslogtreecommitdiff
path: root/scripts/vyatta-qos.pl
blob: b8b1779b055c3474c156f6e3f3ea32462f692edc (plain)
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
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
#!/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 strict;
use warnings;

use Carp;
use Vyatta::Misc;
use Vyatta::Config;
use Getopt::Long;

my $debug = $ENV{'QOS_DEBUG'};

my %policies = (
    'out' => {
	'shaper-hfsc'	   => 'HFSCShaper',
	'shaper'           => 'TrafficShaper',
	'fq-codel'         => 'FairQueueCodel',
	'fair-queue'       => 'FairQueue',
	'rate-control'     => 'RateLimiter',
	'drop-tail'        => 'DropTail',
	'network-emulator' => 'NetworkEmulator',
	'round-robin'      => 'RoundRobin',
	'priority-queue'   => 'Priority',
	'random-detect'    => 'RandomDetect',
    },
    'in' => {
	'limiter' => 'TrafficLimiter',
    }
);

# find policy for name - also check for duplicates
## find_policy('limited')
sub find_policy {
    my $name   = shift;
    my $config = new Vyatta::Config;

    $config->setLevel('traffic-policy');
    my @policy = grep { $config->exists("$_ $name") } $config->listNodes();

    die "Policy name \"$name\" conflict, used by: ", join( ' ', @policy ), "\n"
      if ( $#policy > 0 );

    return $policy[0];
}

# class factory for policies
sub make_policy {
    my ( $type, $name, $direction ) = @_;
    my $policy_type;

    if ($direction) {
        $policy_type = $policies{$direction}{$type};
    } else {
        foreach my $direction ( keys %policies ) {
            $policy_type = $policies{$direction}{$type};
            last if defined $policy_type;
        }
    }

    # This means template exists but we don't know what it is.
    unless ($policy_type) {
        foreach my $direction ( keys %policies ) {
            die
"QoS policy $name is type $type and is only valid for $direction\n"
              if $policies{$direction}{$type};
        }
        die "QoS policy $name has not been created\n";
    }

    my $config = new Vyatta::Config;
    $config->setLevel("traffic-policy $type $name");

    my $location = "Vyatta/Qos/$policy_type.pm";
    my $class    = "Vyatta::Qos::$policy_type";

    require $location;

    return $class->new( $config, $name, $direction );
}

## list defined qos policy names
sub list_policy {
    my $config = new Vyatta::Config;
    $config->setLevel('traffic-policy');

    while ( my $direction = shift ) {
        my @qos = grep { $policies{$direction}{$_} } $config->listNodes();
        my @names = ();
        foreach my $type (@qos) {
            my @n = $config->listNodes($type);
            push @names, @n;
        }
        print join( ' ', @names ), "\n";
    }
}

my %delcmd = (
    'out' => 'root',
    'in'  => 'parent ffff:',
);

## delete_interface('eth0')
# remove all filters and qdisc's
sub delete_interface {
    my ( $interface, $direction ) = @_;
    my $arg = $delcmd{$direction};

    die "bad direction $direction\n" unless $arg;

    my $cmd = "/sbin/tc qdisc del dev $interface ". $arg . " 2>/dev/null";

    # ignore errors (may have no qdisc)
    system($cmd);
}

## start_interface('ppp0')
# reapply qos policy to interface
sub start_interface {
    while ( my $ifname = shift ) {
        my $interface = new Vyatta::Interface($ifname);
        die "Unknown interface type: $ifname" unless $interface;

	my $path = $interface->path();
	next unless $path;

        my $config = new Vyatta::Config;
	$config->setLevel($path . ' traffic-policy');

        foreach my $direction ($config->listNodes()) {
	    my $policy = $config->returnValue($direction);
	    next unless $policy;

	    update_interface( $ifname, $direction, $policy );
	}
    }
}

sub start_openvpn_interface {
  my ($ifname, $direction, $policy) = @_;
  update_interface( $ifname, $direction, $policy );
}
sub apply_openvpn_action {
  my ($dev, $action, $target) = @_;
  my $interface = new Vyatta::Interface($dev);
  die "Unknown interface type: $dev" unless $interface;

	# Clear existing ingress
	system("/sbin/tc qdisc del dev $dev parent ffff: 2>/dev/null");

	system("/sbin/tc qdisc add dev $dev handle ffff: ingress") == 0
	    or die "tc qdisc ingress failed";

	my $cmd =
	    "/sbin/tc filter add dev $dev parent ffff:"
	    . " protocol all prio 10 u32"
	    . " match u32 0 0 flowid 1:1"
	    . " action mirred egress $action dev $target";

	system($cmd) == 0
	    or die "tc action $action command failed";

  system("/sbin/tc qdisc del dev $dev parent ffff: 2>/dev/null")
  	if ($action eq '__undef');
}

## interface_exists('wan0.1')
# check if interface exists
# Note: retry to handle chicken-egg problem with ppp devices
#       ppp devices can take a while to get named correctly
#       ppp script won't see policy until it is committed
sub interface_exists {
    my $ifname = shift;
    my $sysfs  = "/sys/class/net/$ifname";

    for (my $i = 0; $i < 10; ++$i) {
	return 1 if ( -d $sysfs );
	sleep 1;
    }
    return;
}

## update_interface('eth0', 'my-shaper')
# update policy to interface
sub update_interface {
    my ( $device, $direction, $name ) = @_;
    my $policy = find_policy($name);
    die "Unknown traffic-policy $name\n" unless $policy;

    my $shaper = make_policy( $policy, $name, $direction );
    exit 1 unless $shaper;

    unless (interface_exists($device)) {
	warn "$device not present yet, traffic-policy will be applied later\n";
	return;
    }

    # Remove old policy
    delete_interface( $device, $direction );

    # When doing debugging just echo the commands
    my $out;
    unless ($debug) {
        open ( $out, '|-', '/sbin/tc -batch -' )
	    or die "Tc setup failed: $!\n";

	select $out;
    }

    $shaper->commands( $device, $direction );

    return if ($debug);

    select STDOUT;

    unless(close($out)) {
        # cleanup any partial commands
        delete_interface( $device, $direction );

        # replay commands to stdout
        $shaper->commands($device, $direction );
        die "TC command failed.";
    }
}

# return array of references to (name, direction, policy)
sub interfaces_using {
    my $policy = shift;
    my $config = new Vyatta::Config;
    my @inuse  = ();

    foreach my $name ( getInterfaces() ) {
        my $intf = new Vyatta::Interface($name);
        next unless $intf;
	my $level = $intf->path() . ' traffic-policy';
	$config->setLevel($level);

        foreach my $direction ($config->listNodes()) {
	    my $cur = $config->returnValue($direction);
	    next unless $cur;

	    # these are arguments to update_interface()
	    push @inuse, [ $name, $direction, $policy ]
		if ($cur eq $policy);
	}
    }
    return @inuse;
}

# check if policy name(s) are still in use
sub delete_policy {
    while ( my $name = shift ) {
	# interfaces_using returns array of array and only want name
	my @inuse = map { @$_[0] } interfaces_using($name);

	die "Can not delete traffic-policy $name, still applied"
	    . " to interface ", join(', ', @inuse), "\n"
	    if @inuse;
    }
}

sub create_policy {
    my ( $policy, $name ) = @_;
    find_policy($name);

    # Check policy for validity
    my $shaper = make_policy( $policy, $name );
    exit 1 unless $shaper;
}

# Configuration changed, reapply to all interfaces.
sub apply_policy {
    while (my $name = shift) {
	my @usedby = interfaces_using($name);
	if (@usedby) {
	    foreach my $args (@usedby) {
		update_interface( @$args );
	    }
	} elsif (my $policy = find_policy($name)) {
	    # Recheck the policy, might have new errors.
	    my $shaper = make_policy( $policy, $name );
	    exit 1 unless $shaper;
	}
    }
}

#
# This is used for actions mirror and redirect
sub update_action {
    while ( my $dev = shift ) {
	apply_action($dev);
    }
}

sub apply_action{
    my $dev = shift;
    my $interface = new Vyatta::Interface($dev);
    die "Unknown interface type: $dev" unless $interface;

    my $path = $interface->path();
    next unless $path;

    my $config = new Vyatta::Config;
    $config->setLevel( $path );

    my $ingress =  $config->returnValue('traffic-policy in');

    foreach my $action (qw(mirror redirect)) {
	my $target = $config->returnValue($action);
	next unless $target;

	# TODO support combination of limiting and redirect/mirror
	die "interface $dev: combination of $action"
	    . " and traffic-policy $ingress not supported\n"
	    if ($ingress);

	# Clear existing ingress
	system("/sbin/tc qdisc del dev $dev parent ffff: 2>/dev/null");

	system("/sbin/tc qdisc add dev $dev handle ffff: ingress") == 0
	    or die "tc qdisc ingress failed";

	my $cmd =
	    "/sbin/tc filter add dev $dev parent ffff:"
	    . " protocol all prio 10 u32"
	    . " match u32 0 0 flowid 1:1"
	    . " action mirred egress $action dev $target";

	system($cmd) == 0
	    or die "tc action $action command failed";

	return;
    }

    # Drop what ever was there before...
    system("/sbin/tc qdisc del dev $dev parent ffff: 2>/dev/null")
	unless($ingress);
}

# find any interfaces whose actions refer to this interface
sub interfaces_refer {
    my $dev = shift;
    my $config = new Vyatta::Config;
    my @inuse  = ();

    foreach my $name ( getInterfaces() ) {
        my $intf = new Vyatta::Interface($name);
        next unless $intf;
	$config->setLevel($intf->path());

	foreach my $policy ( qw(redirect mirror) ) {
	    my $target = $config->returnValue($policy);
	    next unless $target;

	    if ($dev eq $target) {
		push @inuse, $name;
		last;
	    }
	}
    }

    return @inuse;
}

sub check_target {
    my $name= shift;
    my @inuse = interfaces_refer ( $name );

    die "Can not delete interface $name, still being used by: ",
       join(', ', @inuse), "\n" if @inuse;

}

sub delete_action {
    foreach my $dev (@_) {
	system("/sbin/tc qdisc del dev $dev parent ffff: 2>/dev/null");
    }
}

sub usage {
    print <<EOF;
usage: vyatta-qos.pl --list-policy direction
       vyatta-qos.pl --create-policy policy-type policy-name
       vyatta-qos.pl --delete-policy policy-name
       vyatta-qos.pl --apply-policy policy-type policy-name

       vyatta-qos.pl --update-interface interface direction policy-name
       vyatta-qos.pl --delete-interface interface direction
       vyatta-qos.pl --start-interface interface

       vyatta-qos.pl --update-action interface
       vyatta-qos.pl --delete-action interface
EOF
    exit 1;
}

my (@startList, @updateInterface, @deleteInterface);
my ($updateAction, $deleteAction, $checkTarget);
my ($listPolicy, @createPolicy, @applyPolicy, @deletePolicy);
my (@startOpenVPNList, @openvpnAction);

GetOptions(
    "start-interface=s"     => \@startList,
    "start-openvpn-interface=s{3}"=> \@startOpenVPNList,
    "update-openvpn-action=s{3}"=> \@openvpnAction,
    "update-interface=s{3}" => \@updateInterface,
    "delete-interface=s{2}" => \@deleteInterface,

    "list-policy=s"         => \$listPolicy,
    "delete-policy=s"       => \@deletePolicy,
    "create-policy=s{2}"    => \@createPolicy,
    "apply-policy=s"        => \@applyPolicy,

    "update-action=s"	    => \$updateAction,
    "delete-action=s"	    => \$deleteAction,
    "check-target=s"	    => \$checkTarget,
) or usage();

delete_interface(@deleteInterface) if ( $#deleteInterface == 1 );
update_interface(@updateInterface) if ( $#updateInterface == 2 );
start_interface(@startList)        if ( @startList );
start_openvpn_interface(@startOpenVPNList)        if ( @startOpenVPNList );
apply_openvpn_action(@openvpnAction)	   if ( @openvpnAction );

list_policy($listPolicy)           if ( $listPolicy );
create_policy(@createPolicy)       if ( $#createPolicy == 1 );
delete_policy(@deletePolicy)       if ( @deletePolicy );
apply_policy(@applyPolicy)         if ( @applyPolicy );

update_action($updateAction)	   if ( $updateAction );
delete_action($deleteAction)	   if ( $deleteAction );
check_target($checkTarget)	   if ( $checkTarget );