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 ingres >/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     # virtio uses large packets 64K, so we need to set mtu to that
  20     # value - else filter drops those packets and rate limit does not work.
  21     run_command("/sbin/tc filter add dev $iface parent ffff: "
  22                 "protocol ip prio 50 u32 match ip src 0.0.0.0/0 "
  23                 "police rate ${rate}bps burst ${burst}b "
  24                 "mtu 64kb drop flowid :1");
  25
  26     # tbf does not work for unknown reason
  27     #$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 $iface parent ffff:");
  38     }
  39 }
  40
  41
  42 sub copy_bridge_config {
  43     my ($br0, $br1) = @_;
  44
  45     return if $br0 eq $br1;
  46
  47     my $br_configs = [ 'ageing_time', 'stp_state', 'priority', 'forward_delay',
  48                        'hello_time', 'max_age'];
  49
  50     foreach my $sysname (@$br_configs) {
  51         eval {
  52             my $v0 = PVE::Tools::file_read_firstline("/sys/class/net/$br0/bridge/$sysname");
  53             my $v1 = PVE::Tools::file_read_firstline("/sys/class/net/$br1/bridge/$sysname");
  54             if ($v0 ne $v1) {
  55                 system("echo \"$v0\" > /sys/class/net/$br1/bridge/$sysname") == 0 ||
  56                     warn "unable to set bridge config '$sysname'\n";
  57             }
  58         };
  59         warn $@ if $@;
  60     }
  61 }
  62
  63 sub activate_bridge_vlan {
  64     my ($bridge, $tag_param) = @_;
  65
  66     die "bridge '$bridge' is not active\n" if ! -d "/sys/class/net/$bridge";
  67
  68     return $bridge if !defined($tag_param); # no vlan, simply return
  69
  70     my $tag = int($tag_param);
  71
  72     die "got strange vlan tag '$tag_param'\n" if $tag < 1 || $tag > 4094;
  73
  74     my $bridgevlan = "${bridge}v$tag";
  75
  76     my $dir = "/sys/class/net/$bridge/brif";
  77
  78     #check if we have an only one ethX or bondX interface in the bridge
  79
  80     my $iface;
  81     PVE::Tools::dir_glob_foreach($dir, '((eth|bond)\d+)', sub {
  82         my ($slave) = @_;
  83
  84         die "more then one physical interfaces on bridge '$bridge'\n" if $iface;
  85         $iface = $slave;
  86
  87     });
  88
  89     die "no physical interface on bridge '$bridge'\n" if !$iface;
  90
  91     my $ifacevlan = "${iface}.$tag";
  92
  93     # create vlan on $iface is not already exist
  94     if (! -d "/sys/class/net/$ifacevlan") {
  95         system("/sbin/vconfig add $iface $tag") == 0 ||
  96             die "can't add vlan tag $tag to interface $iface\n";
  97     }
  98
  99     # be sure to have the $ifacevlan up
 100     system("/sbin/ip link set $ifacevlan up") == 0 ||
 101         die "can't up interface $ifacevlan\n";
 102
 103     # test if $vlaniface is already enslaved in another bridge
 104     my $path= "/sys/class/net/$ifacevlan/brport/bridge";
 105     if (-l $path) {
 106         my $tbridge = basename(readlink($path));
 107         if ($tbridge eq $bridgevlan) {
 108             # already member of bridge - assume setup is already done
 109             return $bridgevlan;
 110         } else {
 111             die "interface $ifacevlan already exist in bridge $tbridge\n";
 112         }
 113     }
 114
 115     # add bridgevlan if it doesn't already exist
 116     if (! -d "/sys/class/net/$bridgevlan") {
 117         system("/usr/sbin/brctl addbr $bridgevlan") == 0 ||
 118             die "can't add bridge $bridgevlan\n";
 119     }
 120
 121     #fixme: set other bridge flags
 122
 123     # be sure to have the bridge up
 124     system("/sbin/ip link set $bridgevlan up") == 0 ||
 125         die "can't up bridge $bridgevlan\n";
 126
 127     # add $ifacevlan to the bridge
 128     system("/usr/sbin/brctl addif $bridgevlan $ifacevlan") == 0 ||
 129         die "can't add interface $ifacevlan to bridge $bridgevlan\n";
 130
 131     return $bridgevlan;
 132 }
 133
 134 1;