src/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 our $ipv4_reverse_mask = [
  13     '0.0.0.0',
  14     '128.0.0.0',
  15     '192.0.0.0',
  16     '224.0.0.0',
  17     '240.0.0.0',
  18     '248.0.0.0',
  19     '252.0.0.0',
  20     '254.0.0.0',
  21     '255.0.0.0',
  22     '255.128.0.0',
  23     '255.192.0.0',
  24     '255.224.0.0',
  25     '255.240.0.0',
  26     '255.248.0.0',
  27     '255.252.0.0',
  28     '255.254.0.0',
  29     '255.255.0.0',
  30     '255.255.128.0',
  31     '255.255.192.0',
  32     '255.255.224.0',
  33     '255.255.240.0',
  34     '255.255.248.0',
  35     '255.255.252.0',
  36     '255.255.254.0',
  37     '255.255.255.0',
  38     '255.255.255.128',
  39     '255.255.255.192',
  40     '255.255.255.224',
  41     '255.255.255.240',
  42     '255.255.255.248',
  43     '255.255.255.252',
  44     '255.255.255.254',
  45     '255.255.255.255',
  46 ];
  47
  48 our $ipv4_mask_hash_localnet = {
  49     '255.255.0.0' => 16,
  50     '255.255.128.0' => 17,
  51     '255.255.192.0' => 18,
  52     '255.255.224.0' => 19,
  53     '255.255.240.0' => 20,
  54     '255.255.248.0' => 21,
  55     '255.255.252.0' => 22,
  56     '255.255.254.0' => 23,
  57     '255.255.255.0' => 24,
  58     '255.255.255.128' => 25,
  59     '255.255.255.192' => 26,
  60     '255.255.255.224' => 27,
  61     '255.255.255.240' => 28,
  62     '255.255.255.248' => 29,
  63     '255.255.255.252' => 30,
  64 };
  65
  66 sub setup_tc_rate_limit {
  67     my ($iface, $rate, $burst, $debug) = @_;
  68
  69     system("/sbin/tc class del dev $iface parent 1: classid 1:1 >/dev/null 2>&1");
  70     system("/sbin/tc filter del dev $iface parent ffff: protocol all pref 50 u32 >/dev/null 2>&1");
  71     system("/sbin/tc qdisc del dev $iface ingress >/dev/null 2>&1");
  72     system("/sbin/tc qdisc del dev $iface root >/dev/null 2>&1");
  73
  74     return if !$rate;
  75
  76     # tbf does not work for unknown reason
  77     #$TC qdisc add dev $DEV root tbf rate $RATE latency 100ms burst $BURST
  78     # so we use htb instead
  79     run_command("/sbin/tc qdisc add dev $iface root handle 1: htb default 1");
  80     run_command("/sbin/tc class add dev $iface parent 1: classid 1:1 " .
  81                 "htb rate ${rate}bps burst ${burst}b");
  82
  83     run_command("/sbin/tc qdisc add dev $iface handle ffff: ingress");
  84     run_command("/sbin/tc filter add dev $iface parent ffff: " .
  85                 "protocol all prio 50 u32 match u32 0 0 " .
  86                 "police rate ${rate}bps burst ${burst}b mtu 64kb " .
  87                 "drop flowid :1");
  88
  89     if ($debug) {
  90         print "DEBUG tc settings\n";
  91         system("/sbin/tc qdisc ls dev $iface");
  92         system("/sbin/tc class ls dev $iface");
  93         system("/sbin/tc filter ls dev $iface parent ffff:");
  94     }
  95 }
  96
  97 sub tap_rate_limit {
  98     my ($iface, $rate) = @_;
  99
 100     my $debug = 0;
 101     $rate = int($rate*1024*1024);
 102     my $burst = 1024*1024;
 103
 104     setup_tc_rate_limit($iface, $rate, $burst, $debug);
 105 }
 106
 107 my $read_bridge_mtu = sub {
 108     my ($bridge) = @_;
 109
 110     my $mtu = PVE::Tools::file_read_firstline("/sys/class/net/$bridge/mtu");
 111     die "bridge '$bridge' does not exist\n" if !$mtu;
 112     # avoid insecure dependency;
 113     die "unable to parse mtu value" if $mtu !~ /^(\d+)$/;
 114     $mtu = int($1);
 115
 116     return $mtu;
 117 };
 118
 119 my $parse_tap_device_name = sub {
 120     my ($iface, $noerr) = @_;
 121
 122     my ($vmid, $devid);
 123
 124     if ($iface =~ m/^tap(\d+)i(\d+)$/) {
 125         $vmid = $1;
 126         $devid = $2;
 127     } elsif ($iface =~ m/^veth(\d+)i(\d+)$/) {
 128         $vmid = $1;
 129         $devid = $2;
 130     } else {
 131         return undef if $noerr;
 132         die "can't create firewall bridge for random interface name '$iface'\n";
 133     }
 134
 135     return ($vmid, $devid);
 136 };
 137
 138 my $compute_fwbr_names = sub {
 139     my ($vmid, $devid) = @_;
 140
 141     my $fwbr = "fwbr${vmid}i${devid}";
 142     # Note: the firewall use 'fwln+' to filter traffic to VMs
 143     my $vethfw = "fwln${vmid}i${devid}";
 144     my $vethfwpeer = "fwpr${vmid}p${devid}";
 145     my $ovsintport = "fwln${vmid}o${devid}";
 146
 147     return ($fwbr, $vethfw, $vethfwpeer, $ovsintport);
 148 };
 149
 150 my $cond_create_bridge = sub {
 151     my ($bridge) = @_;
 152
 153     if (! -d "/sys/class/net/$bridge") {
 154         system("/sbin/brctl addbr $bridge") == 0 ||
 155             die "can't add bridge '$bridge'\n";
 156     }
 157 };
 158
 159 my $bridge_add_interface = sub {
 160     my ($bridge, $iface, $tag) = @_;
 161
 162     system("/sbin/brctl addif $bridge $iface") == 0 ||
 163         die "can't add interface 'iface' to bridge '$bridge'\n";
 164
 165    my $vlan_aware = PVE::Tools::file_read_firstline("/sys/class/net/$bridge/bridge/vlan_filtering");
 166
 167    if ($vlan_aware) {
 168         if ($tag) {
 169             system("/sbin/bridge vlan add dev $iface vid $tag pvid untagged") == 0 ||
 170             die "unable to add vlan $tag to interface $iface\n";
 171         } else {
 172             system("/sbin/bridge vlan add dev $iface vid 2-4094") == 0 ||
 173             die "unable to add vlan $tag to interface $iface\n";
 174         }
 175    }
 176 };
 177
 178 my $ovs_bridge_add_port = sub {
 179     my ($bridge, $iface, $tag, $internal) = @_;
 180
 181     my $cmd = "/usr/bin/ovs-vsctl add-port $bridge $iface";
 182     $cmd .= " tag=$tag" if $tag;
 183     $cmd .= " -- set Interface $iface type=internal" if $internal;
 184     system($cmd) == 0 ||
 185         die "can't add ovs port '$iface'\n";
 186 };
 187
 188 my $activate_interface = sub {
 189     my ($iface) = @_;
 190
 191     system("/sbin/ip link set $iface up") == 0 ||
 192         die "can't activate interface '$iface'\n";
 193 };
 194
 195 sub tap_create {
 196     my ($iface, $bridge) = @_;
 197
 198     die "unable to get bridge setting\n" if !$bridge;
 199
 200     my $bridgemtu = &$read_bridge_mtu($bridge);
 201
 202     eval {
 203         PVE::Tools::run_command("/sbin/ifconfig $iface 0.0.0.0 promisc up mtu $bridgemtu");
 204     };
 205     die "interface activation failed\n" if $@;
 206 }
 207
 208 sub veth_create {
 209     my ($veth, $vethpeer, $bridge, $mac) = @_;
 210
 211     die "unable to get bridge setting\n" if !$bridge;
 212
 213     my $bridgemtu = &$read_bridge_mtu($bridge);
 214
 215     # create veth pair
 216     if (! -d "/sys/class/net/$veth") {
 217         my $cmd = "/sbin/ip link add name $veth type veth peer name $vethpeer mtu $bridgemtu";
 218         $cmd .= " addr $mac" if $mac;
 219         system($cmd) == 0 || die "can't create interface $veth\n";
 220     }
 221
 222     # up vethpair
 223     &$activate_interface($veth);
 224     &$activate_interface($vethpeer);
 225 }
 226
 227 sub veth_delete {
 228     my ($veth) = @_;
 229
 230     if (-d "/sys/class/net/$veth") {
 231         run_command("/sbin/ip link delete dev $veth", outfunc => sub {}, errfunc => sub {});
 232     }
 233
 234 }
 235
 236 my $create_firewall_bridge_linux = sub {
 237     my ($iface, $bridge, $tag) = @_;
 238
 239     my ($vmid, $devid) = &$parse_tap_device_name($iface);
 240     my ($fwbr, $vethfw, $vethfwpeer) = &$compute_fwbr_names($vmid, $devid);
 241
 242     &$cond_create_bridge($fwbr);
 243     &$activate_interface($fwbr);
 244
 245     copy_bridge_config($bridge, $fwbr);
 246     veth_create($vethfw, $vethfwpeer, $bridge);
 247
 248     &$bridge_add_interface($fwbr, $vethfw);
 249     &$bridge_add_interface($bridge, $vethfwpeer, $tag);
 250
 251     &$bridge_add_interface($fwbr, $iface);
 252 };
 253
 254 my $create_firewall_bridge_ovs = sub {
 255     my ($iface, $bridge, $tag) = @_;
 256
 257     my ($vmid, $devid) = &$parse_tap_device_name($iface);
 258     my ($fwbr, undef, undef, $ovsintport) = &$compute_fwbr_names($vmid, $devid);
 259
 260     my $bridgemtu = &$read_bridge_mtu($bridge);
 261
 262     &$cond_create_bridge($fwbr);
 263     &$activate_interface($fwbr);
 264
 265     &$bridge_add_interface($fwbr, $iface);
 266
 267     &$ovs_bridge_add_port($bridge, $ovsintport, $tag, 1);
 268     &$activate_interface($ovsintport);
 269
 270     # set the same mtu for ovs int port
 271     PVE::Tools::run_command("/sbin/ifconfig $ovsintport mtu $bridgemtu");
 272
 273     &$bridge_add_interface($fwbr, $ovsintport);
 274 };
 275
 276 my $cleanup_firewall_bridge = sub {
 277     my ($iface) = @_;
 278
 279     my ($vmid, $devid) = &$parse_tap_device_name($iface, 1);
 280     return if !defined($vmid);
 281     my ($fwbr, $vethfw, $vethfwpeer, $ovsintport) = &$compute_fwbr_names($vmid, $devid);
 282
 283     # cleanup old port config from any openvswitch bridge
 284     if (-d "/sys/class/net/$ovsintport") {
 285         run_command("/usr/bin/ovs-vsctl del-port $ovsintport", outfunc => sub {}, errfunc => sub {});
 286     }
 287
 288     # delete old vethfw interface
 289     veth_delete($vethfw);
 290
 291     # cleanup fwbr bridge
 292     if (-d "/sys/class/net/$fwbr") {
 293         run_command("/sbin/ip link set dev $fwbr down", outfunc => sub {}, errfunc => sub {});
 294         run_command("/sbin/brctl delbr $fwbr", outfunc => sub {}, errfunc => sub {});
 295     }
 296 };
 297
 298 sub tap_plug {
 299     my ($iface, $bridge, $tag, $firewall) = @_;
 300
 301     #cleanup old port config from any openvswitch bridge
 302     eval {run_command("/usr/bin/ovs-vsctl del-port $iface", outfunc => sub {}, errfunc => sub {}) };
 303
 304     if (-d "/sys/class/net/$bridge/bridge") {
 305         &$cleanup_firewall_bridge($iface); # remove stale devices
 306
 307         my $vlan_aware = PVE::Tools::file_read_firstline("/sys/class/net/$bridge/bridge/vlan_filtering");
 308
 309         if (!$vlan_aware) {
 310             my $newbridge = activate_bridge_vlan($bridge, $tag);
 311             copy_bridge_config($bridge, $newbridge) if $bridge ne $newbridge;
 312             $bridge = $newbridge;
 313             $tag = undef;
 314         }
 315
 316         if ($firewall) {
 317             &$create_firewall_bridge_linux($iface, $bridge, $tag);
 318         } else {
 319             &$bridge_add_interface($bridge, $iface, $tag);
 320         }
 321
 322     } else {
 323         &$cleanup_firewall_bridge($iface); # remove stale devices
 324
 325         if ($firewall) {
 326             &$create_firewall_bridge_ovs($iface, $bridge, $tag);
 327         } else {
 328             &$ovs_bridge_add_port($bridge, $iface, $tag);
 329         }
 330     }
 331 }
 332
 333 sub tap_unplug {
 334     my ($iface) = @_;
 335
 336     my $path= "/sys/class/net/$iface/brport/bridge";
 337     if (-l $path) {
 338         my $bridge = basename(readlink($path));
 339         #avoid insecure dependency;
 340         ($bridge) = $bridge =~ /(\S+)/;
 341
 342         system("/sbin/brctl delif $bridge $iface") == 0 ||
 343             die "can't del interface '$iface' from bridge '$bridge'\n";
 344
 345     }
 346
 347     &$cleanup_firewall_bridge($iface);
 348 }
 349
 350 sub copy_bridge_config {
 351     my ($br0, $br1) = @_;
 352
 353     return if $br0 eq $br1;
 354
 355     my $br_configs = [ 'ageing_time', 'stp_state', 'priority', 'forward_delay',
 356                        'hello_time', 'max_age', 'multicast_snooping', 'multicast_querier'];
 357
 358     foreach my $sysname (@$br_configs) {
 359         eval {
 360             my $v0 = PVE::Tools::file_read_firstline("/sys/class/net/$br0/bridge/$sysname");
 361             my $v1 = PVE::Tools::file_read_firstline("/sys/class/net/$br1/bridge/$sysname");
 362             if ($v0 ne $v1) {
 363                  PVE::ProcFSTools::write_proc_entry("/sys/class/net/$br1/bridge/$sysname", $v0);
 364             }
 365         };
 366         warn $@ if $@;
 367     }
 368 }
 369
 370 sub activate_bridge_vlan_slave {
 371     my ($bridgevlan, $iface, $tag) = @_;
 372     my $ifacevlan = "${iface}.$tag";
 373
 374     # create vlan on $iface is not already exist
 375     if (! -d "/sys/class/net/$ifacevlan") {
 376         system("/sbin/ip link add link $iface name ${iface}.${tag} type vlan id $tag") == 0 ||
 377             die "can't add vlan tag $tag to interface $iface\n";
 378     }
 379
 380     # be sure to have the $ifacevlan up
 381     &$activate_interface($ifacevlan);
 382
 383     # test if $vlaniface is already enslaved in another bridge
 384     my $path= "/sys/class/net/$ifacevlan/brport/bridge";
 385     if (-l $path) {
 386         my $tbridge = basename(readlink($path));
 387         if ($tbridge ne $bridgevlan) {
 388             die "interface $ifacevlan already exist in bridge $tbridge\n";
 389         } else {
 390             # Port already attached to bridge: do nothing.
 391             return;
 392         }
 393     }
 394
 395     # add $ifacevlan to the bridge
 396     &$bridge_add_interface($bridgevlan, $ifacevlan);
 397 }
 398
 399 sub activate_bridge_vlan {
 400     my ($bridge, $tag_param) = @_;
 401
 402     die "bridge '$bridge' is not active\n" if ! -d "/sys/class/net/$bridge";
 403
 404     return $bridge if !defined($tag_param); # no vlan, simply return
 405
 406     my $tag = int($tag_param);
 407
 408     die "got strange vlan tag '$tag_param'\n" if $tag < 1 || $tag > 4094;
 409
 410     my $bridgevlan = "${bridge}v$tag";
 411
 412     my @ifaces = ();
 413     my $dir = "/sys/class/net/$bridge/brif";
 414     PVE::Tools::dir_glob_foreach($dir, '((eth|bond)\d+)', sub {
 415         push @ifaces, $_[0];
 416     });
 417
 418     die "no physical interface on bridge '$bridge'\n" if scalar(@ifaces) == 0;
 419
 420     # add bridgevlan if it doesn't already exist
 421     if (! -d "/sys/class/net/$bridgevlan") {
 422         system("/sbin/brctl addbr $bridgevlan") == 0 ||
 423             die "can't add bridge $bridgevlan\n";
 424     }
 425
 426     # for each physical interface (eth or bridge) bind them to bridge vlan
 427     foreach my $iface (@ifaces) {
 428         activate_bridge_vlan_slave($bridgevlan, $iface, $tag);
 429     }
 430
 431     #fixme: set other bridge flags
 432
 433     # be sure to have the bridge up
 434     system("/sbin/ip link set $bridgevlan up") == 0 ||
 435         die "can't up bridge $bridgevlan\n";
 436
 437     return $bridgevlan;
 438 }
 439
 440 1;