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 class del dev $iface parent 1: classid 1:1 >/dev/null 2>&1");
  15     system("/sbin/tc filter del dev $iface parent ffff: protocol ip prio 50 estimator 1sec 8sec >/dev/null 2>&1");
  16     system("/sbin/tc qdisc del dev $iface ingress >/dev/null 2>&1");
  17     system("/sbin/tc qdisc del dev $iface root >/dev/null 2>&1");
  18
  19     return if (!$rate || ($rate && $rate == 0));
  20
  21     run_command("/sbin/tc qdisc add dev $iface handle ffff: ingress");
  22
  23     # this does not work wit virtio - don't know why (setting "mtu 64kb" does not help)
  24     #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");
  25     # so we use avrate instead
  26     run_command("/sbin/tc filter add dev $iface parent ffff: " .
  27                 "protocol ip prio 50 estimator 1sec 8sec " .
  28                 "u32 match ip src 0.0.0.0/0 police avrate ${rate}bps drop flowid :1");
  29
  30     # tbf does not work for unknown reason
  31     #$TC qdisc add dev $DEV root tbf rate $RATE latency 100ms burst $BURST
  32     # so we use htb instead
  33     run_command("/sbin/tc qdisc add dev $iface root handle 1: htb default 1");
  34     run_command("/sbin/tc class add dev $iface parent 1: classid 1:1 " .
  35                 "htb rate ${rate}bps burst ${burst}b");
  36
  37     if ($debug) {
  38         print "DEBUG tc settings\n";
  39         system("/sbin/tc qdisc ls dev $iface");
  40         system("/sbin/tc class ls dev $iface");
  41         system("/sbin/tc filter ls dev $iface parent ffff:");
  42     }
  43 }
  44
  45 sub tap_rate_limit {
  46     my ($iface, $rate) = @_;
  47
  48     my $debug = 0;
  49     $rate = int($rate*1024*1024);
  50     my $burst = 1024*1024;
  51
  52     setup_tc_rate_limit($iface, $rate, $burst, $debug);
  53 }
  54
  55 sub tap_create {
  56     my ($iface, $bridge) = @_;
  57
  58     die "unable to get bridge setting\n" if !$bridge;
  59
  60     my $bridgemtu = PVE::Tools::file_read_firstline("/sys/class/net/$bridge/mtu");
  61         die "bridge '$bridge' does not exist\n" if !$bridgemtu;
  62
  63     eval{ PVE::Tools::run_command("/sbin/ifconfig $iface 0.0.0.0 promisc up mtu $bridgemtu");};
  64         die "interface activation failed\n" if $@;
  65 }
  66
  67 sub tap_plug {
  68     my ($iface, $bridge, $tag) = @_;
  69
  70     my $newbridge = activate_bridge_vlan($bridge, $tag);
  71     copy_bridge_config($bridge, $newbridge) if $bridge ne $newbridge;
  72
  73     system ("/usr/sbin/brctl addif $newbridge $iface") == 0 ||
  74         die "can't add interface to bridge\n";
  75 }
  76
  77 sub copy_bridge_config {
  78     my ($br0, $br1) = @_;
  79
  80     return if $br0 eq $br1;
  81
  82     my $br_configs = [ 'ageing_time', 'stp_state', 'priority', 'forward_delay',
  83                        'hello_time', 'max_age'];
  84
  85     foreach my $sysname (@$br_configs) {
  86         eval {
  87             my $v0 = PVE::Tools::file_read_firstline("/sys/class/net/$br0/bridge/$sysname");
  88             my $v1 = PVE::Tools::file_read_firstline("/sys/class/net/$br1/bridge/$sysname");
  89             if ($v0 ne $v1) {
  90                 system("echo \"$v0\" > /sys/class/net/$br1/bridge/$sysname") == 0 ||
  91                     warn "unable to set bridge config '$sysname'\n";
  92             }
  93         };
  94         warn $@ if $@;
  95     }
  96 }
  97
  98 sub activate_bridge_vlan {
  99     my ($bridge, $tag_param) = @_;
 100
 101     die "bridge '$bridge' is not active\n" if ! -d "/sys/class/net/$bridge";
 102
 103     return $bridge if !defined($tag_param); # no vlan, simply return
 104
 105     my $tag = int($tag_param);
 106
 107     die "got strange vlan tag '$tag_param'\n" if $tag < 1 || $tag > 4094;
 108
 109     my $bridgevlan = "${bridge}v$tag";
 110
 111     my $dir = "/sys/class/net/$bridge/brif";
 112
 113     #check if we have an only one ethX or bondX interface in the bridge
 114
 115     my $iface;
 116     PVE::Tools::dir_glob_foreach($dir, '((eth|bond)\d+)', sub {
 117         my ($slave) = @_;
 118
 119         die "more then one physical interfaces on bridge '$bridge'\n" if $iface;
 120         $iface = $slave;
 121
 122     });
 123
 124     die "no physical interface on bridge '$bridge'\n" if !$iface;
 125
 126     my $ifacevlan = "${iface}.$tag";
 127
 128     # create vlan on $iface is not already exist
 129     if (! -d "/sys/class/net/$ifacevlan") {
 130         system("/sbin/vconfig add $iface $tag") == 0 ||
 131             die "can't add vlan tag $tag to interface $iface\n";
 132     }
 133
 134     # be sure to have the $ifacevlan up
 135     system("/sbin/ip link set $ifacevlan up") == 0 ||
 136         die "can't up interface $ifacevlan\n";
 137
 138     # test if $vlaniface is already enslaved in another bridge
 139     my $path= "/sys/class/net/$ifacevlan/brport/bridge";
 140     if (-l $path) {
 141         my $tbridge = basename(readlink($path));
 142         if ($tbridge eq $bridgevlan) {
 143             # already member of bridge - assume setup is already done
 144             return $bridgevlan;
 145         } else {
 146             die "interface $ifacevlan already exist in bridge $tbridge\n";
 147         }
 148     }
 149
 150     # add bridgevlan if it doesn't already exist
 151     if (! -d "/sys/class/net/$bridgevlan") {
 152         system("/usr/sbin/brctl addbr $bridgevlan") == 0 ||
 153             die "can't add bridge $bridgevlan\n";
 154     }
 155
 156     #fixme: set other bridge flags
 157
 158     # be sure to have the bridge up
 159     system("/sbin/ip link set $bridgevlan up") == 0 ||
 160         die "can't up bridge $bridgevlan\n";
 161
 162     # add $ifacevlan to the bridge
 163     system("/usr/sbin/brctl addif $bridgevlan $ifacevlan") == 0 ||
 164         die "can't add interface $ifacevlan to bridge $bridgevlan\n";
 165
 166     return $bridgevlan;
 167 }
 168
 169 1;