pve-bridge

   1 #!/usr/bin/perl -w
   2
   3 use strict;
   4 use PVE::QemuServer;
   5 use PVE::Tools qw(run_command);
   6
   7 my $iface = shift;
   8
   9 die "no interface specified\n" if !$iface;
  10
  11 die "got strange interface name '$iface'\n"
  12     if $iface !~ m/^tap(\d+)i(\d+)$/;
  13
  14 my $vmid = $1;
  15 my $netid = "net$2";
  16
  17 my $conf = PVE::QemuServer::load_config ($vmid);
  18
  19 die "unable to get network config '$netid'\n"
  20     if !$conf->{$netid};
  21
  22 my $net = PVE::QemuServer::parse_net($conf->{$netid});
  23 die "unable to parse network config '$netid'\n" if !$net;
  24
  25 my $bridge = $net->{bridge};
  26 die "unable to get bridge setting\n" if !$bridge;
  27
  28 system ("/sbin/ifconfig $iface 0.0.0.0 promisc up") == 0 ||
  29     die "interface activation failed\n";
  30
  31 if ($net->{rate}) {
  32
  33     my $rate = int($net->{rate}*1024*1024);
  34     my $burst = 1024*1024;
  35
  36     system("/sbin/tc qdisc del dev $iface ingres >/dev/null 2>&1");
  37     system("/sbin/tc qdisc del dev $iface root >/dev/null 2>&1");
  38
  39     run_command("/sbin/tc qdisc add dev $iface handle ffff: ingress");
  40
  41     # this does not work wit virtio - don't know why
  42     #run_command("/sbin/tc filter add dev $iface parent ffff: protocol ip prio 50 u32 match ip src 0.0.0.0/0 police rate ${rate}bps burst ${burst}b drop flowid :1");
  43     # so we use avrate instead
  44     run_command("/sbin/tc filter add dev $iface parent ffff: " .
  45                 "protocol ip prio 50 estimator 1sec 8sec " .
  46                 "u32 match ip src 0.0.0.0/0 police avrate ${rate}bps drop flowid :1");
  47
  48     # tbf does not work for unknown reason
  49     #$TC qdisc add dev $DEV root tbf rate $RATE latency 100ms burst $BURST
  50     # so we use htb instead
  51     run_command("/sbin/tc qdisc add dev $iface root handle 1: htb default 1");
  52     run_command("/sbin/tc class add dev $iface parent 1: classid 1:1 " .
  53                 "htb rate ${rate}bps burst ${burst}b");
  54
  55     # enable this to debug tc
  56     if (0) {
  57         print "DEBUG tc settings\n";
  58         system("/sbin/tc qdisc ls dev $iface");
  59         system("/sbin/tc class ls dev $iface");
  60         system("/sbin/tc filter ls dev $iface parent ffff:");
  61     }
  62
  63 }
  64
  65 system ("/usr/sbin/brctl addif $bridge $iface") == 0 ||
  66     die "can't add interface to bridge\n";
  67
  68 exit 0;