data/PVE/Network.pm

   1 package PVE::Network;
   2
   3 use strict;
   4 use PVE::Tools qw(run_command);
   5 use PVE::ProcFSTools;
   6 use PVE::INotify;
   7 use File::Basename;
   8
   9 # host network related utility functions
  10
  11 sub setup_tc_rate_limit {
  12     my ($iface, $rate, $burst, $debug) = @_;
  13
  14     system("/sbin/tc qdisc del dev $iface ingress >/dev/null 2>&1");
  15     system("/sbin/tc qdisc del dev $iface root >/dev/null 2>&1");
  16
  17     run_command("/sbin/tc qdisc add dev $iface handle ffff: ingress");
  18
  19     # this does not work wit virtio - don't know why (setting "mtu 64kb" does not help)
  20     #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");
  21     # so we use avrate instead
  22     run_command("/sbin/tc filter add dev $iface parent ffff: " .
  23                 "protocol ip prio 50 estimator 1sec 8sec " .
  24                 "u32 match ip src 0.0.0.0/0 police avrate ${rate}bps drop flowid :1");
  25
  26     # tbf does not work for unknown reason
  27     #$TC qdisc add dev $DEV root tbf rate $RATE latency 100ms burst $BURST
  28     # so we use htb instead
  29     run_command("/sbin/tc qdisc add dev $iface root handle 1: htb default 1");
  30     run_command("/sbin/tc class add dev $iface parent 1: classid 1:1 " .
  31                 "htb rate ${rate}bps burst ${burst}b");
  32
  33     if ($debug) {
  34         print "DEBUG tc settings\n";
  35         system("/sbin/tc qdisc ls dev $iface");
  36         system("/sbin/tc class ls dev $iface");
  37         system("/sbin/tc filter ls dev $iface parent ffff:");
  38     }
  39 }
  40
  41 sub tap_rate_limit {
  42     my ($iface, $rate) = @_;
  43
  44     my $debug = 0;
  45     $rate = int($rate*1024*1024);
  46     my $burst = 1024*1024;
  47
  48     setup_tc_rate_limit($iface, $rate, $burst, $debug);
  49 }
  50
  51 sub copy_bridge_config {
  52     my ($br0, $br1) = @_;
  53
  54     return if $br0 eq $br1;
  55
  56     my $br_configs = [ 'ageing_time', 'stp_state', 'priority', 'forward_delay',
  57                        'hello_time', 'max_age'];
  58
  59     foreach my $sysname (@$br_configs) {
  60         eval {
  61             my $v0 = PVE::Tools::file_read_firstline("/sys/class/net/$br0/bridge/$sysname");
  62             my $v1 = PVE::Tools::file_read_firstline("/sys/class/net/$br1/bridge/$sysname");
  63             if ($v0 ne $v1) {
  64                 system("echo \"$v0\" > /sys/class/net/$br1/bridge/$sysname") == 0 ||
  65                     warn "unable to set bridge config '$sysname'\n";
  66             }
  67         };
  68         warn $@ if $@;
  69     }
  70 }
  71
  72 sub activate_bridge_vlan {
  73     my ($bridge, $tag_param) = @_;
  74
  75     die "bridge '$bridge' is not active\n" if ! -d "/sys/class/net/$bridge";
  76
  77     return $bridge if !defined($tag_param); # no vlan, simply return
  78
  79     my $tag = int($tag_param);
  80
  81     die "got strange vlan tag '$tag_param'\n" if $tag < 1 || $tag > 4094;
  82
  83     my $bridgevlan = "${bridge}v$tag";
  84
  85     my $dir = "/sys/class/net/$bridge/brif";
  86
  87     #check if we have an only one ethX or bondX interface in the bridge
  88
  89     my $iface;
  90     PVE::Tools::dir_glob_foreach($dir, '((eth|bond)\d+)', sub {
  91         my ($slave) = @_;
  92
  93         die "more then one physical interfaces on bridge '$bridge'\n" if $iface;
  94         $iface = $slave;
  95
  96     });
  97
  98     die "no physical interface on bridge '$bridge'\n" if !$iface;
  99
 100     my $ifacevlan = "${iface}.$tag";
 101
 102     # create vlan on $iface is not already exist
 103     if (! -d "/sys/class/net/$ifacevlan") {
 104         system("/sbin/vconfig add $iface $tag") == 0 ||
 105             die "can't add vlan tag $tag to interface $iface\n";
 106     }
 107
 108     # be sure to have the $ifacevlan up
 109     system("/sbin/ip link set $ifacevlan up") == 0 ||
 110         die "can't up interface $ifacevlan\n";
 111
 112     # test if $vlaniface is already enslaved in another bridge
 113     my $path= "/sys/class/net/$ifacevlan/brport/bridge";
 114     if (-l $path) {
 115         my $tbridge = basename(readlink($path));
 116         if ($tbridge eq $bridgevlan) {
 117             # already member of bridge - assume setup is already done
 118             return $bridgevlan;
 119         } else {
 120             die "interface $ifacevlan already exist in bridge $tbridge\n";
 121         }
 122     }
 123
 124     # add bridgevlan if it doesn't already exist
 125     if (! -d "/sys/class/net/$bridgevlan") {
 126         system("/usr/sbin/brctl addbr $bridgevlan") == 0 ||
 127             die "can't add bridge $bridgevlan\n";
 128     }
 129
 130     #fixme: set other bridge flags
 131
 132     # be sure to have the bridge up
 133     system("/sbin/ip link set $bridgevlan up") == 0 ||
 134         die "can't up bridge $bridgevlan\n";
 135
 136     # add $ifacevlan to the bridge
 137     system("/usr/sbin/brctl addif $bridgevlan $ifacevlan") == 0 ||
 138         die "can't add interface $ifacevlan to bridge $bridgevlan\n";
 139
 140     return $bridgevlan;
 141 }
 142
 143 1;