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 my $read_bridge_mtu = sub {
  57     my ($bridge) = @_;
  58
  59     my $mtu = PVE::Tools::file_read_firstline("/sys/class/net/$bridge/mtu");
  60     die "bridge '$bridge' does not exist\n" if !$mtu;
  61     # avoid insecure dependency;
  62     die "unable to parse mtu value" if $mtu !~ /^(\d+)$/;
  63     $mtu = int($1);
  64
  65     return $mtu;
  66 };
  67
  68 my $parse_tap_devive_name = sub {
  69     my ($iface) = @_;
  70
  71     my ($vmid, $devid);
  72
  73     if ($iface =~ m/^tap(\d+)i(\d+)$/) {
  74         $vmid = $1;
  75         $devid = $2;
  76     } elsif ($iface =~ m/^veth(\d+)\.(\d+)$/) {
  77         $vmid = $1;
  78         $devid = $2;
  79     } else {
  80         die "wrong interface name $iface";
  81     }
  82
  83     return ($vmid, $devid);
  84 };
  85
  86 my $compute_fwbr_names = sub {
  87     my ($vmid, $devid) = @_;
  88
  89     my $fwbr = "fwbr${vmid}i${devid}";
  90     my $vethfw = "fwln${vmid}i${devid}";
  91     my $vethfwpeer = "fwpr${vmid}p${devid}";
  92     my $ovsintport = "fwln${vmid}o${devid}";
  93
  94     return ($fwbr, $vethfw, $vethfwpeer, $ovsintport);
  95 };
  96
  97 my $cond_create_bridge = sub {
  98     my ($bridge) = @_;
  99
 100     if (! -d "/sys/class/net/$bridge") {
 101         system("/sbin/brctl addbr $bridge") == 0 ||
 102             die "can't add bridge '$bridge'\n";
 103     }
 104 };
 105
 106 my $bridge_add_interface = sub {
 107     my ($bridge, $iface) = @_;
 108
 109     system("/sbin/brctl addif $bridge $iface") == 0 ||
 110         die "can't add interface 'iface' to bridge '$bridge'\n";
 111 };
 112
 113 my $ovs_bridge_add_port = sub {
 114     my ($bridge, $iface, $tag, $internal) = @_;
 115
 116     my $cmd = "/usr/bin/ovs-vsctl add-port $bridge $iface";
 117     $cmd .= " tag=$tag" if $tag;
 118     $cmd .= " -- set Interface $iface type=internal" if $internal;
 119     system($cmd) == 0 ||
 120         die "can't add ovs port '$iface'\n";
 121 };
 122
 123 my $activate_interface = sub {
 124     my ($iface) = @_;
 125
 126     system("/sbin/ip link set $iface up") == 0 ||
 127         die "can't activate interface '$iface'\n";
 128 };
 129
 130 sub tap_create {
 131     my ($iface, $bridge) = @_;
 132
 133     die "unable to get bridge setting\n" if !$bridge;
 134
 135     my $bridgemtu = &$read_bridge_mtu($bridge);
 136
 137     eval {
 138         PVE::Tools::run_command("/sbin/ifconfig $iface 0.0.0.0 promisc up mtu $bridgemtu");
 139     };
 140     die "interface activation failed\n" if $@;
 141 }
 142
 143 my $create_firewall_bridge_linux = sub {
 144     my ($iface, $bridge) = @_;
 145
 146     my ($vmid, $devid) = &$parse_tap_devive_name($iface);
 147     my ($fwbr, $vethfw, $vethfwpeer) = &$compute_fwbr_names($vmid, $devid);
 148
 149     my $bridgemtu = &$read_bridge_mtu($bridge);
 150
 151     &$cond_create_bridge($fwbr);
 152     &$activate_interface($fwbr);
 153
 154     copy_bridge_config($bridge, $fwbr);
 155     # create veth pair
 156     if (! -d "/sys/class/net/$vethfw") {
 157         system("/sbin/ip link add name $vethfw type veth peer name $vethfwpeer mtu $bridgemtu") == 0 ||
 158             die "can't create interface $vethfw\n";
 159     }
 160
 161     # up vethpair
 162     &$activate_interface($vethfw);
 163     &$activate_interface($vethfwpeer);
 164
 165     &$bridge_add_interface($fwbr, $vethfw);
 166     &$bridge_add_interface($bridge, $vethfwpeer);
 167
 168     return $fwbr;
 169 };
 170
 171 my $create_firewall_bridge_ovs = sub {
 172     my ($iface, $bridge, $tag) = @_;
 173
 174     my ($vmid, $devid) = &$parse_tap_devive_name($iface);
 175     my ($fwbr, undef, undef, $ovsintport) = &$compute_fwbr_names($vmid, $devid);
 176
 177     my $bridgemtu = &$read_bridge_mtu($bridge);
 178
 179     &$cond_create_bridge($fwbr);
 180     &$activate_interface($fwbr);
 181
 182     &$bridge_add_interface($fwbr, $iface);
 183
 184     &$ovs_bridge_add_port($bridge, $ovsintport, $tag, 1);
 185
 186     # set the same mtu for ovs int port
 187     PVE::Tools::run_command("/sbin/ifconfig $ovsintport mtu $bridgemtu");
 188
 189     &$bridge_add_interface($fwbr, $ovsintport);
 190 };
 191
 192 my $cleanup_firewall_bridge = sub {
 193     my ($iface) = @_;
 194
 195     my ($vmid, $devid) = &$parse_tap_devive_name($iface);
 196     my ($fwbr, $vethfw, $vethfwpeer, $ovsintport) = &$compute_fwbr_names($vmid, $devid);
 197
 198     # cleanup old port config from any openvswitch bridge
 199     if (-d "/sys/class/net/$ovsintport") {
 200         run_command("/usr/bin/ovs-vsctl del-port $ovsintport", outfunc => sub {}, errfunc => sub {});
 201     }
 202
 203     # delete old vethfw interface
 204     if (-d "/sys/class/net/$vethfw") {
 205         run_command("/sbin/ip link delete dev $vethfw", outfunc => sub {}, errfunc => sub {});
 206     }
 207
 208     # cleanup fwbr bridge
 209     if (-d "/sys/class/net/$fwbr") {
 210         run_command("/sbin/ip link set dev $fwbr down", outfunc => sub {}, errfunc => sub {});
 211         run_command("/sbin/brctl delbr $fwbr", outfunc => sub {}, errfunc => sub {});
 212     }
 213 };
 214
 215 sub tap_plug {
 216     my ($iface, $bridge, $tag, $firewall) = @_;
 217
 218     #cleanup old port config from any openvswitch bridge
 219     eval {run_command("/usr/bin/ovs-vsctl del-port $iface", outfunc => sub {}, errfunc => sub {}) };
 220
 221     if (-d "/sys/class/net/$bridge/bridge") {
 222         &$cleanup_firewall_bridge($iface); # remove stale devices
 223
 224         my $newbridge = activate_bridge_vlan($bridge, $tag);
 225         copy_bridge_config($bridge, $newbridge) if $bridge ne $newbridge;
 226
 227         $newbridge = &$create_firewall_bridge_linux($iface, $newbridge) if $firewall;
 228
 229         &$bridge_add_interface($newbridge, $iface);
 230     } else {
 231         &$cleanup_firewall_bridge($iface); # remove stale devices
 232
 233         if ($firewall) {
 234             &$create_firewall_bridge_ovs($iface, $bridge, $tag);
 235         } else {
 236             &$ovs_bridge_add_port($bridge, $iface, $tag);
 237         }
 238     }
 239 }
 240
 241 sub tap_unplug {
 242     my ($iface) = @_;
 243
 244     my $path= "/sys/class/net/$iface/brport/bridge";
 245     if (-l $path) {
 246         my $bridge = basename(readlink($path));
 247         #avoid insecure dependency;
 248         ($bridge) = $bridge =~ /(\S+)/;
 249
 250         system("/sbin/brctl delif $bridge $iface") == 0 ||
 251             die "can't del interface '$iface' from bridge '$bridge'\n";
 252
 253     }
 254
 255     &$cleanup_firewall_bridge($iface);
 256 }
 257
 258 sub copy_bridge_config {
 259     my ($br0, $br1) = @_;
 260
 261     return if $br0 eq $br1;
 262
 263     my $br_configs = [ 'ageing_time', 'stp_state', 'priority', 'forward_delay',
 264                        'hello_time', 'max_age', 'multicast_snooping', 'multicast_querier'];
 265
 266     foreach my $sysname (@$br_configs) {
 267         eval {
 268             my $v0 = PVE::Tools::file_read_firstline("/sys/class/net/$br0/bridge/$sysname");
 269             my $v1 = PVE::Tools::file_read_firstline("/sys/class/net/$br1/bridge/$sysname");
 270             if ($v0 ne $v1) {
 271                  PVE::ProcFSTools::write_proc_entry("/sys/class/net/$br1/bridge/$sysname", $v0);
 272             }
 273         };
 274         warn $@ if $@;
 275     }
 276 }
 277
 278 sub activate_bridge_vlan_slave {
 279     my ($bridgevlan, $iface, $tag) = @_;
 280     my $ifacevlan = "${iface}.$tag";
 281
 282     # create vlan on $iface is not already exist
 283     if (! -d "/sys/class/net/$ifacevlan") {
 284         system("/sbin/vconfig add $iface $tag") == 0 ||
 285             die "can't add vlan tag $tag to interface $iface\n";
 286     }
 287
 288     # be sure to have the $ifacevlan up
 289     &$activate_interface($ifacevlan);
 290
 291     # test if $vlaniface is already enslaved in another bridge
 292     my $path= "/sys/class/net/$ifacevlan/brport/bridge";
 293     if (-l $path) {
 294         my $tbridge = basename(readlink($path));
 295         if ($tbridge ne $bridgevlan) {
 296             die "interface $ifacevlan already exist in bridge $tbridge\n";
 297         } else {
 298             # Port already attached to bridge: do nothing.
 299             return;
 300         }
 301     }
 302
 303     # add $ifacevlan to the bridge
 304     &$bridge_add_interface($bridgevlan, $ifacevlan);
 305 }
 306
 307 sub activate_bridge_vlan {
 308     my ($bridge, $tag_param) = @_;
 309
 310     die "bridge '$bridge' is not active\n" if ! -d "/sys/class/net/$bridge";
 311
 312     return $bridge if !defined($tag_param); # no vlan, simply return
 313
 314     my $tag = int($tag_param);
 315
 316     die "got strange vlan tag '$tag_param'\n" if $tag < 1 || $tag > 4094;
 317
 318     my $bridgevlan = "${bridge}v$tag";
 319
 320     my @ifaces = ();
 321     my $dir = "/sys/class/net/$bridge/brif";
 322     PVE::Tools::dir_glob_foreach($dir, '((eth|bond)\d+)', sub {
 323         push @ifaces, $_[0];
 324     });
 325
 326     die "no physical interface on bridge '$bridge'\n" if scalar(@ifaces) == 0;
 327
 328     # add bridgevlan if it doesn't already exist
 329     if (! -d "/sys/class/net/$bridgevlan") {
 330         system("/sbin/brctl addbr $bridgevlan") == 0 ||
 331             die "can't add bridge $bridgevlan\n";
 332     }
 333
 334     # for each physical interface (eth or bridge) bind them to bridge vlan
 335     foreach my $iface (@ifaces) {
 336         activate_bridge_vlan_slave($bridgevlan, $iface, $tag);
 337     }
 338
 339     #fixme: set other bridge flags
 340
 341     # be sure to have the bridge up
 342     system("/sbin/ip link set $bridgevlan up") == 0 ||
 343         die "can't up bridge $bridgevlan\n";
 344
 345     return $bridgevlan;
 346 }
 347
 348 1;