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 use IO::Socket::IP;
  10 use POSIX qw(ECONNREFUSED);
  11
  12 use Net::IP;
  13
  14 # host network related utility functions
  15
  16 our $ipv4_reverse_mask = [
  17     '0.0.0.0',
  18     '128.0.0.0',
  19     '192.0.0.0',
  20     '224.0.0.0',
  21     '240.0.0.0',
  22     '248.0.0.0',
  23     '252.0.0.0',
  24     '254.0.0.0',
  25     '255.0.0.0',
  26     '255.128.0.0',
  27     '255.192.0.0',
  28     '255.224.0.0',
  29     '255.240.0.0',
  30     '255.248.0.0',
  31     '255.252.0.0',
  32     '255.254.0.0',
  33     '255.255.0.0',
  34     '255.255.128.0',
  35     '255.255.192.0',
  36     '255.255.224.0',
  37     '255.255.240.0',
  38     '255.255.248.0',
  39     '255.255.252.0',
  40     '255.255.254.0',
  41     '255.255.255.0',
  42     '255.255.255.128',
  43     '255.255.255.192',
  44     '255.255.255.224',
  45     '255.255.255.240',
  46     '255.255.255.248',
  47     '255.255.255.252',
  48     '255.255.255.254',
  49     '255.255.255.255',
  50 ];
  51
  52 our $ipv4_mask_hash_localnet = {
  53     '255.255.0.0' => 16,
  54     '255.255.128.0' => 17,
  55     '255.255.192.0' => 18,
  56     '255.255.224.0' => 19,
  57     '255.255.240.0' => 20,
  58     '255.255.248.0' => 21,
  59     '255.255.252.0' => 22,
  60     '255.255.254.0' => 23,
  61     '255.255.255.0' => 24,
  62     '255.255.255.128' => 25,
  63     '255.255.255.192' => 26,
  64     '255.255.255.224' => 27,
  65     '255.255.255.240' => 28,
  66     '255.255.255.248' => 29,
  67     '255.255.255.252' => 30,
  68 };
  69
  70 sub setup_tc_rate_limit {
  71     my ($iface, $rate, $burst, $debug) = @_;
  72
  73     system("/sbin/tc class del dev $iface parent 1: classid 1:1 >/dev/null 2>&1");
  74     system("/sbin/tc filter del dev $iface parent ffff: protocol all pref 50 u32 >/dev/null 2>&1");
  75     system("/sbin/tc qdisc del dev $iface ingress >/dev/null 2>&1");
  76     system("/sbin/tc qdisc del dev $iface root >/dev/null 2>&1");
  77
  78     return if !$rate;
  79
  80     # tbf does not work for unknown reason
  81     #$TC qdisc add dev $DEV root tbf rate $RATE latency 100ms burst $BURST
  82     # so we use htb instead
  83     run_command("/sbin/tc qdisc add dev $iface root handle 1: htb default 1");
  84     run_command("/sbin/tc class add dev $iface parent 1: classid 1:1 " .
  85                 "htb rate ${rate}bps burst ${burst}b");
  86
  87     run_command("/sbin/tc qdisc add dev $iface handle ffff: ingress");
  88     run_command("/sbin/tc filter add dev $iface parent ffff: " .
  89                 "protocol all prio 50 u32 match u32 0 0 " .
  90                 "police rate ${rate}bps burst ${burst}b mtu 64kb " .
  91                 "drop flowid :1");
  92
  93     if ($debug) {
  94         print "DEBUG tc settings\n";
  95         system("/sbin/tc qdisc ls dev $iface");
  96         system("/sbin/tc class ls dev $iface");
  97         system("/sbin/tc filter ls dev $iface parent ffff:");
  98     }
  99 }
 100
 101 sub tap_rate_limit {
 102     my ($iface, $rate) = @_;
 103
 104     my $debug = 0;
 105     $rate = int($rate*1024*1024);
 106     my $burst = 1024*1024;
 107
 108     setup_tc_rate_limit($iface, $rate, $burst, $debug);
 109 }
 110
 111 my $read_bridge_mtu = sub {
 112     my ($bridge) = @_;
 113
 114     my $mtu = PVE::Tools::file_read_firstline("/sys/class/net/$bridge/mtu");
 115     die "bridge '$bridge' does not exist\n" if !$mtu;
 116     # avoid insecure dependency;
 117     die "unable to parse mtu value" if $mtu !~ /^(\d+)$/;
 118     $mtu = int($1);
 119
 120     return $mtu;
 121 };
 122
 123 my $parse_tap_device_name = sub {
 124     my ($iface, $noerr) = @_;
 125
 126     my ($vmid, $devid);
 127
 128     if ($iface =~ m/^tap(\d+)i(\d+)$/) {
 129         $vmid = $1;
 130         $devid = $2;
 131     } elsif ($iface =~ m/^veth(\d+)i(\d+)$/) {
 132         $vmid = $1;
 133         $devid = $2;
 134     } else {
 135         return undef if $noerr;
 136         die "can't create firewall bridge for random interface name '$iface'\n";
 137     }
 138
 139     return ($vmid, $devid);
 140 };
 141
 142 my $compute_fwbr_names = sub {
 143     my ($vmid, $devid) = @_;
 144
 145     my $fwbr = "fwbr${vmid}i${devid}";
 146     # Note: the firewall use 'fwln+' to filter traffic to VMs
 147     my $vethfw = "fwln${vmid}i${devid}";
 148     my $vethfwpeer = "fwpr${vmid}p${devid}";
 149     my $ovsintport = "fwln${vmid}o${devid}";
 150
 151     return ($fwbr, $vethfw, $vethfwpeer, $ovsintport);
 152 };
 153
 154 my $cond_create_bridge = sub {
 155     my ($bridge) = @_;
 156
 157     if (! -d "/sys/class/net/$bridge") {
 158         system("/sbin/brctl addbr $bridge") == 0 ||
 159             die "can't add bridge '$bridge'\n";
 160     }
 161 };
 162
 163 my $bridge_add_interface = sub {
 164     my ($bridge, $iface, $tag, $trunks) = @_;
 165
 166     system("/sbin/brctl addif $bridge $iface") == 0 ||
 167         die "can't add interface 'iface' to bridge '$bridge'\n";
 168
 169    my $vlan_aware = PVE::Tools::file_read_firstline("/sys/class/net/$bridge/bridge/vlan_filtering");
 170
 171    if ($vlan_aware) {
 172         if ($tag) {
 173             system("/sbin/bridge vlan add dev $iface vid $tag pvid untagged") == 0 ||
 174             die "unable to add vlan $tag to interface $iface\n";
 175         } else {
 176             system("/sbin/bridge vlan add dev $iface vid 2-4094") == 0 ||
 177             die "unable to add default vlan tags to interface $iface\n" if !$trunks;
 178         }
 179
 180         if ($trunks) {
 181             my @trunks_array = split /;/, $trunks;
 182             foreach my $trunk (@trunks_array) {
 183                 system("/sbin/bridge vlan add dev $iface vid $trunk") == 0 ||
 184                 die "unable to add vlan $trunk to interface $iface\n";
 185             }
 186         }
 187    }
 188 };
 189
 190 my $ovs_bridge_add_port = sub {
 191     my ($bridge, $iface, $tag, $internal, $trunks) = @_;
 192
 193     $trunks =~ s/;/,/g if $trunks;
 194
 195     my $cmd = "/usr/bin/ovs-vsctl add-port $bridge $iface";
 196     $cmd .= " tag=$tag" if $tag;
 197     $cmd .= " trunks=". join(',', $trunks) if $trunks;
 198     $cmd .= " vlan_mode=native-untagged" if $tag && $trunks;
 199
 200     $cmd .= " -- set Interface $iface type=internal" if $internal;
 201     system($cmd) == 0 ||
 202         die "can't add ovs port '$iface'\n";
 203 };
 204
 205 my $activate_interface = sub {
 206     my ($iface) = @_;
 207
 208     system("/sbin/ip link set $iface up") == 0 ||
 209         die "can't activate interface '$iface'\n";
 210 };
 211
 212 sub tap_create {
 213     my ($iface, $bridge) = @_;
 214
 215     die "unable to get bridge setting\n" if !$bridge;
 216
 217     my $bridgemtu = &$read_bridge_mtu($bridge);
 218
 219     eval {
 220         PVE::Tools::run_command("/sbin/ifconfig $iface 0.0.0.0 promisc up mtu $bridgemtu");
 221     };
 222     die "interface activation failed\n" if $@;
 223 }
 224
 225 sub veth_create {
 226     my ($veth, $vethpeer, $bridge, $mac) = @_;
 227
 228     die "unable to get bridge setting\n" if !$bridge;
 229
 230     my $bridgemtu = &$read_bridge_mtu($bridge);
 231
 232     # create veth pair
 233     if (! -d "/sys/class/net/$veth") {
 234         my $cmd = "/sbin/ip link add name $veth type veth peer name $vethpeer mtu $bridgemtu";
 235         $cmd .= " addr $mac" if $mac;
 236         system($cmd) == 0 || die "can't create interface $veth\n";
 237     }
 238
 239     # up vethpair
 240     &$activate_interface($veth);
 241     &$activate_interface($vethpeer);
 242 }
 243
 244 sub veth_delete {
 245     my ($veth) = @_;
 246
 247     if (-d "/sys/class/net/$veth") {
 248         run_command("/sbin/ip link delete dev $veth", outfunc => sub {}, errfunc => sub {});
 249     }
 250
 251 }
 252
 253 my $create_firewall_bridge_linux = sub {
 254     my ($iface, $bridge, $tag, $trunks) = @_;
 255
 256     my ($vmid, $devid) = &$parse_tap_device_name($iface);
 257     my ($fwbr, $vethfw, $vethfwpeer) = &$compute_fwbr_names($vmid, $devid);
 258
 259     &$cond_create_bridge($fwbr);
 260     &$activate_interface($fwbr);
 261
 262     copy_bridge_config($bridge, $fwbr);
 263     veth_create($vethfw, $vethfwpeer, $bridge);
 264
 265     &$bridge_add_interface($fwbr, $vethfw);
 266     &$bridge_add_interface($bridge, $vethfwpeer, $tag, $trunks);
 267
 268     &$bridge_add_interface($fwbr, $iface);
 269 };
 270
 271 my $create_firewall_bridge_ovs = sub {
 272     my ($iface, $bridge, $tag, $trunks) = @_;
 273
 274     my ($vmid, $devid) = &$parse_tap_device_name($iface);
 275     my ($fwbr, undef, undef, $ovsintport) = &$compute_fwbr_names($vmid, $devid);
 276
 277     my $bridgemtu = &$read_bridge_mtu($bridge);
 278
 279     &$cond_create_bridge($fwbr);
 280     &$activate_interface($fwbr);
 281
 282     &$bridge_add_interface($fwbr, $iface);
 283
 284     &$ovs_bridge_add_port($bridge, $ovsintport, $tag, 1, $trunks);
 285     &$activate_interface($ovsintport);
 286
 287     # set the same mtu for ovs int port
 288     PVE::Tools::run_command("/sbin/ifconfig $ovsintport mtu $bridgemtu");
 289
 290     &$bridge_add_interface($fwbr, $ovsintport);
 291 };
 292
 293 my $cleanup_firewall_bridge = sub {
 294     my ($iface) = @_;
 295
 296     my ($vmid, $devid) = &$parse_tap_device_name($iface, 1);
 297     return if !defined($vmid);
 298     my ($fwbr, $vethfw, $vethfwpeer, $ovsintport) = &$compute_fwbr_names($vmid, $devid);
 299
 300     # cleanup old port config from any openvswitch bridge
 301     if (-d "/sys/class/net/$ovsintport") {
 302         run_command("/usr/bin/ovs-vsctl del-port $ovsintport", outfunc => sub {}, errfunc => sub {});
 303     }
 304
 305     # delete old vethfw interface
 306     veth_delete($vethfw);
 307
 308     # cleanup fwbr bridge
 309     if (-d "/sys/class/net/$fwbr") {
 310         run_command("/sbin/ip link set dev $fwbr down", outfunc => sub {}, errfunc => sub {});
 311         run_command("/sbin/brctl delbr $fwbr", outfunc => sub {}, errfunc => sub {});
 312     }
 313 };
 314
 315 sub tap_plug {
 316     my ($iface, $bridge, $tag, $firewall, $trunks) = @_;
 317
 318     #cleanup old port config from any openvswitch bridge
 319     eval {run_command("/usr/bin/ovs-vsctl del-port $iface", outfunc => sub {}, errfunc => sub {}) };
 320
 321     if (-d "/sys/class/net/$bridge/bridge") {
 322         &$cleanup_firewall_bridge($iface); # remove stale devices
 323
 324         my $vlan_aware = PVE::Tools::file_read_firstline("/sys/class/net/$bridge/bridge/vlan_filtering");
 325
 326         if (!$vlan_aware) {
 327             die "vlan aware feature need to be enabled to use trunks" if $trunks;
 328             my $newbridge = activate_bridge_vlan($bridge, $tag);
 329             copy_bridge_config($bridge, $newbridge) if $bridge ne $newbridge;
 330             $bridge = $newbridge;
 331             $tag = undef;
 332         }
 333
 334         if ($firewall) {
 335             &$create_firewall_bridge_linux($iface, $bridge, $tag, $trunks);
 336         } else {
 337             &$bridge_add_interface($bridge, $iface, $tag, $trunks);
 338         }
 339
 340     } else {
 341         &$cleanup_firewall_bridge($iface); # remove stale devices
 342
 343         if ($firewall) {
 344             &$create_firewall_bridge_ovs($iface, $bridge, $tag, $trunks);
 345         } else {
 346             &$ovs_bridge_add_port($bridge, $iface, $tag, undef, $trunks);
 347         }
 348     }
 349 }
 350
 351 sub tap_unplug {
 352     my ($iface) = @_;
 353
 354     my $path= "/sys/class/net/$iface/brport/bridge";
 355     if (-l $path) {
 356         my $bridge = basename(readlink($path));
 357         #avoid insecure dependency;
 358         ($bridge) = $bridge =~ /(\S+)/;
 359
 360         system("/sbin/brctl delif $bridge $iface") == 0 ||
 361             die "can't del interface '$iface' from bridge '$bridge'\n";
 362
 363     }
 364
 365     &$cleanup_firewall_bridge($iface);
 366 }
 367
 368 sub copy_bridge_config {
 369     my ($br0, $br1) = @_;
 370
 371     return if $br0 eq $br1;
 372
 373     my $br_configs = [ 'ageing_time', 'stp_state', 'priority', 'forward_delay',
 374                        'hello_time', 'max_age', 'multicast_snooping', 'multicast_querier'];
 375
 376     foreach my $sysname (@$br_configs) {
 377         eval {
 378             my $v0 = PVE::Tools::file_read_firstline("/sys/class/net/$br0/bridge/$sysname");
 379             my $v1 = PVE::Tools::file_read_firstline("/sys/class/net/$br1/bridge/$sysname");
 380             if ($v0 ne $v1) {
 381                  PVE::ProcFSTools::write_proc_entry("/sys/class/net/$br1/bridge/$sysname", $v0);
 382             }
 383         };
 384         warn $@ if $@;
 385     }
 386 }
 387
 388 sub activate_bridge_vlan_slave {
 389     my ($bridgevlan, $iface, $tag) = @_;
 390     my $ifacevlan = "${iface}.$tag";
 391
 392     # create vlan on $iface is not already exist
 393     if (! -d "/sys/class/net/$ifacevlan") {
 394         system("/sbin/ip link add link $iface name ${iface}.${tag} type vlan id $tag") == 0 ||
 395             die "can't add vlan tag $tag to interface $iface\n";
 396     }
 397
 398     # be sure to have the $ifacevlan up
 399     &$activate_interface($ifacevlan);
 400
 401     # test if $vlaniface is already enslaved in another bridge
 402     my $path= "/sys/class/net/$ifacevlan/brport/bridge";
 403     if (-l $path) {
 404         my $tbridge = basename(readlink($path));
 405         if ($tbridge ne $bridgevlan) {
 406             die "interface $ifacevlan already exist in bridge $tbridge\n";
 407         } else {
 408             # Port already attached to bridge: do nothing.
 409             return;
 410         }
 411     }
 412
 413     # add $ifacevlan to the bridge
 414     &$bridge_add_interface($bridgevlan, $ifacevlan);
 415 }
 416
 417 sub activate_bridge_vlan {
 418     my ($bridge, $tag_param) = @_;
 419
 420     die "bridge '$bridge' is not active\n" if ! -d "/sys/class/net/$bridge";
 421
 422     return $bridge if !defined($tag_param); # no vlan, simply return
 423
 424     my $tag = int($tag_param);
 425
 426     die "got strange vlan tag '$tag_param'\n" if $tag < 1 || $tag > 4094;
 427
 428     my $bridgevlan = "${bridge}v$tag";
 429
 430     my @ifaces = ();
 431     my $dir = "/sys/class/net/$bridge/brif";
 432     PVE::Tools::dir_glob_foreach($dir, '((eth|bond)\d+(\.\d+)?)', sub {
 433         push @ifaces, $_[0];
 434     });
 435
 436     die "no physical interface on bridge '$bridge'\n" if scalar(@ifaces) == 0;
 437
 438     # add bridgevlan if it doesn't already exist
 439     if (! -d "/sys/class/net/$bridgevlan") {
 440         system("/sbin/brctl addbr $bridgevlan") == 0 ||
 441             die "can't add bridge $bridgevlan\n";
 442     }
 443
 444     # for each physical interface (eth or bridge) bind them to bridge vlan
 445     foreach my $iface (@ifaces) {
 446         activate_bridge_vlan_slave($bridgevlan, $iface, $tag);
 447     }
 448
 449     #fixme: set other bridge flags
 450
 451     # be sure to have the bridge up
 452     system("/sbin/ip link set $bridgevlan up") == 0 ||
 453         die "can't up bridge $bridgevlan\n";
 454
 455     return $bridgevlan;
 456 }
 457
 458 sub tcp_ping {
 459     my ($host, $port, $timeout) = @_;
 460
 461     my $refused = 1;
 462
 463     $timeout = 3 if !$timeout; # sane default
 464     if (!$port) {
 465         # Net::Ping defaults to the echo port
 466         $port = 7;
 467     } else {
 468         # Net::Ping's port_number() implies service_check(1)
 469         $refused = 0;
 470     }
 471
 472     my ($sock, $result);
 473     eval {
 474         $result = PVE::Tools::run_with_timeout($timeout, sub {
 475             $sock = IO::Socket::IP->new(PeerHost => $host, PeerPort => $port, Type => SOCK_STREAM);
 476             $result = $refused if $! == ECONNREFUSED;
 477         });
 478     };
 479     if ($sock) {
 480         $sock->close();
 481         $result = 1;
 482     }
 483     return $result;
 484 }
 485
 486 sub IP_from_cidr {
 487     my ($cidr, $version) = @_;
 488
 489     return if $cidr !~ m!^(\S+?)/(\S+)$!;
 490     my ($ip, $prefix) = ($1, $2);
 491
 492     my $ipobj = Net::IP->new($ip, $version);
 493     return if !$ipobj;
 494
 495     $version = $ipobj->version();
 496
 497     my $binmask = Net::IP::ip_get_mask($prefix, $version);
 498     return if !$binmask;
 499
 500     my $masked_binip = $ipobj->binip() & $binmask;
 501     my $masked_ip = Net::IP::ip_bintoip($masked_binip, $version);
 502     return Net::IP->new("$masked_ip/$prefix");
 503 }
 504
 505 sub is_ip_in_cidr {
 506     my ($ip, $cidr, $version) = @_;
 507
 508     my $cidr_obj = IP_from_cidr($cidr, $version);
 509     return undef if !$cidr_obj;
 510
 511     my $ip_obj = Net::IP->new($ip, $version);
 512     return undef if !$ip_obj;
 513
 514     return $cidr_obj->overlaps($ip_obj) == $Net::IP::IP_B_IN_A_OVERLAP;
 515 }
 516
 517 1;