data/PVE/Network.pm

   1 package PVE::Network;
   2
   3 use strict;
   4 use warnings;
   5 use PVE::Tools qw(run_command);
   6 use PVE::ProcFSTools;
   7 use PVE::INotify;
   8 use File::Basename;
   9
  10 # host network related utility functions
  11
  12 sub setup_tc_rate_limit {
  13     my ($iface, $rate, $burst, $debug) = @_;
  14
  15     system("/sbin/tc class del dev $iface parent 1: classid 1:1 >/dev/null 2>&1");
  16     system("/sbin/tc filter del dev $iface parent ffff: protocol ip prio 50 estimator 1sec 8sec >/dev/null 2>&1");
  17     system("/sbin/tc qdisc del dev $iface ingress >/dev/null 2>&1");
  18     system("/sbin/tc qdisc del dev $iface root >/dev/null 2>&1");
  19
  20     return if !$rate;
  21
  22     run_command("/sbin/tc qdisc add dev $iface handle ffff: ingress");
  23
  24     # this does not work wit virtio - don't know why (setting "mtu 64kb" does not help)
  25     #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");
  26     # so we use avrate instead
  27     run_command("/sbin/tc filter add dev $iface parent ffff: " .
  28                 "protocol ip prio 50 estimator 1sec 8sec " .
  29                 "u32 match ip src 0.0.0.0/0 police avrate ${rate}bps drop flowid :1");
  30
  31     # tbf does not work for unknown reason
  32     #$TC qdisc add dev $DEV root tbf rate $RATE latency 100ms burst $BURST
  33     # so we use htb instead
  34     run_command("/sbin/tc qdisc add dev $iface root handle 1: htb default 1");
  35     run_command("/sbin/tc class add dev $iface parent 1: classid 1:1 " .
  36                 "htb rate ${rate}bps burst ${burst}b");
  37
  38     if ($debug) {
  39         print "DEBUG tc settings\n";
  40         system("/sbin/tc qdisc ls dev $iface");
  41         system("/sbin/tc class ls dev $iface");
  42         system("/sbin/tc filter ls dev $iface parent ffff:");
  43     }
  44 }
  45
  46 sub tap_rate_limit {
  47     my ($iface, $rate) = @_;
  48
  49     my $debug = 0;
  50     $rate = int($rate*1024*1024);
  51     my $burst = 1024*1024;
  52
  53     setup_tc_rate_limit($iface, $rate, $burst, $debug);
  54 }
  55
  56 sub tap_create {
  57     my ($iface, $bridge) = @_;
  58
  59     die "unable to get bridge setting\n" if !$bridge;
  60
  61     my $bridgemtu = PVE::Tools::file_read_firstline("/sys/class/net/$bridge/mtu");
  62         die "bridge '$bridge' does not exist\n" if !$bridgemtu;
  63
  64     eval {
  65         PVE::Tools::run_command("/sbin/ifconfig $iface 0.0.0.0 promisc up mtu $bridgemtu");
  66     };
  67     die "interface activation failed\n" if $@;
  68 }
  69
  70 sub tap_plug {
  71     my ($iface, $bridge, $tag) = @_;
  72
  73     #cleanup old port config from any openvswitch bridge
  74     eval {run_command("/usr/bin/ovs-vsctl del-port $iface", outfunc => sub {}, errfunc => sub {}) };
  75
  76     if (-d "/sys/class/net/$bridge/bridge") {
  77         my $newbridge = activate_bridge_vlan($bridge, $tag);
  78         copy_bridge_config($bridge, $newbridge) if $bridge ne $newbridge;
  79
  80         system("/sbin/brctl addif $newbridge $iface") == 0 ||
  81             die "can't add interface to bridge\n";
  82     } else {
  83         my $cmd = "/usr/bin/ovs-vsctl add-port $bridge $iface";
  84         $cmd .= " tag=$tag" if $tag;
  85         system($cmd) == 0 ||
  86             die "can't add interface to bridge\n";
  87     }
  88 }
  89
  90 sub tap_unplug {
  91     my ($iface) = @_;
  92
  93     my $path= "/sys/class/net/$iface/brport/bridge";
  94     if (-l $path) {
  95         my $bridge = basename(readlink($path));
  96         #avoid insecure dependency;
  97         ($bridge) = $bridge =~ /(\S+)/;
  98
  99         system("/sbin/brctl delif $bridge $iface") == 0 ||
 100             die "can't del interface '$iface' from bridge '$bridge'\n";
 101     } else {
 102         system ("/usr/bin/ovs-vsctl del-port $iface") == 0 ||
 103             die "can't del ovs port '$iface'\n";
 104     }
 105 }
 106
 107 sub copy_bridge_config {
 108     my ($br0, $br1) = @_;
 109
 110     return if $br0 eq $br1;
 111
 112     my $br_configs = [ 'ageing_time', 'stp_state', 'priority', 'forward_delay',
 113                        'hello_time', 'max_age', 'multicast_snooping', 'multicast_querier'];
 114
 115     foreach my $sysname (@$br_configs) {
 116         eval {
 117             my $v0 = PVE::Tools::file_read_firstline("/sys/class/net/$br0/bridge/$sysname");
 118             my $v1 = PVE::Tools::file_read_firstline("/sys/class/net/$br1/bridge/$sysname");
 119             if ($v0 ne $v1) {
 120                  PVE::ProcFSTools::write_proc_entry("/sys/class/net/$br1/bridge/$sysname", $v0);
 121             }
 122         };
 123         warn $@ if $@;
 124     }
 125 }
 126
 127 sub activate_bridge_vlan_slave {
 128     my ($bridgevlan, $iface, $tag) = @_;
 129     my $ifacevlan = "${iface}.$tag";
 130
 131     # create vlan on $iface is not already exist
 132     if (! -d "/sys/class/net/$ifacevlan") {
 133         system("/sbin/vconfig add $iface $tag") == 0 ||
 134             die "can't add vlan tag $tag to interface $iface\n";
 135     }
 136
 137     # be sure to have the $ifacevlan up
 138     system("/sbin/ip link set $ifacevlan up") == 0 ||
 139         die "can't up interface $ifacevlan\n";
 140
 141     # test if $vlaniface is already enslaved in another bridge
 142     my $path= "/sys/class/net/$ifacevlan/brport/bridge";
 143     if (-l $path) {
 144         my $tbridge = basename(readlink($path));
 145         if ($tbridge ne $bridgevlan) {
 146             die "interface $ifacevlan already exist in bridge $tbridge\n";
 147         } else {
 148             # Port already attached to bridge: do nothing.
 149             return;
 150         }
 151     }
 152
 153     # add $ifacevlan to the bridge
 154     system("/sbin/brctl addif $bridgevlan $ifacevlan") == 0 ||
 155         die "can't add interface $ifacevlan to bridge $bridgevlan\n";
 156 }
 157
 158 sub activate_bridge_vlan {
 159     my ($bridge, $tag_param) = @_;
 160
 161     die "bridge '$bridge' is not active\n" if ! -d "/sys/class/net/$bridge";
 162
 163     return $bridge if !defined($tag_param); # no vlan, simply return
 164
 165     my $tag = int($tag_param);
 166
 167     die "got strange vlan tag '$tag_param'\n" if $tag < 1 || $tag > 4094;
 168
 169     my $bridgevlan = "${bridge}v$tag";
 170
 171     my @ifaces = ();
 172     my $dir = "/sys/class/net/$bridge/brif";
 173     PVE::Tools::dir_glob_foreach($dir, '((eth|bond)\d+)', sub {
 174         push @ifaces, $_[0];
 175     });
 176
 177     die "no physical interface on bridge '$bridge'\n" if scalar(@ifaces) == 0;
 178
 179     # add bridgevlan if it doesn't already exist
 180     if (! -d "/sys/class/net/$bridgevlan") {
 181         system("/sbin/brctl addbr $bridgevlan") == 0 ||
 182             die "can't add bridge $bridgevlan\n";
 183     }
 184
 185     # for each physical interface (eth or bridge) bind them to bridge vlan
 186     foreach my $iface (@ifaces) {
 187         activate_bridge_vlan_slave($bridgevlan, $iface, $tag);
 188     }
 189
 190     #fixme: set other bridge flags
 191
 192     # be sure to have the bridge up
 193     system("/sbin/ip link set $bridgevlan up") == 0 ||
 194         die "can't up bridge $bridgevlan\n";
 195
 196     return $bridgevlan;
 197 }
 198
 199 1;