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 ip prio 50 estimator 1sec 8sec >/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     run_command("/sbin/tc qdisc add dev $iface handle ffff: ingress");
  77
  78     # this does not work wit virtio - don't know why (setting "mtu 64kb" does not help)
  79     #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");
  80     # so we use avrate instead
  81     run_command("/sbin/tc filter add dev $iface parent ffff: " .
  82                 "protocol ip prio 50 estimator 1sec 8sec " .
  83                 "u32 match ip src 0.0.0.0/0 police avrate ${rate}bps drop flowid :1");
  84
  85     # tbf does not work for unknown reason
  86     #$TC qdisc add dev $DEV root tbf rate $RATE latency 100ms burst $BURST
  87     # so we use htb instead
  88     run_command("/sbin/tc qdisc add dev $iface root handle 1: htb default 1");
  89     run_command("/sbin/tc class add dev $iface parent 1: classid 1:1 " .
  90                 "htb rate ${rate}bps burst ${burst}b");
  91
  92     if ($debug) {
  93         print "DEBUG tc settings\n";
  94         system("/sbin/tc qdisc ls dev $iface");
  95         system("/sbin/tc class ls dev $iface");
  96         system("/sbin/tc filter ls dev $iface parent ffff:");
  97     }
  98 }
  99
 100 sub tap_rate_limit {
 101     my ($iface, $rate) = @_;
 102
 103     my $debug = 0;
 104     $rate = int($rate*1024*1024);
 105     my $burst = 1024*1024;
 106
 107     setup_tc_rate_limit($iface, $rate, $burst, $debug);
 108 }
 109
 110 my $read_bridge_mtu = sub {
 111     my ($bridge) = @_;
 112
 113     my $mtu = PVE::Tools::file_read_firstline("/sys/class/net/$bridge/mtu");
 114     die "bridge '$bridge' does not exist\n" if !$mtu;
 115     # avoid insecure dependency;
 116     die "unable to parse mtu value" if $mtu !~ /^(\d+)$/;
 117     $mtu = int($1);
 118
 119     return $mtu;
 120 };
 121
 122 my $parse_tap_devive_name = sub {
 123     my ($iface, $noerr) = @_;
 124
 125     my ($vmid, $devid);
 126
 127     if ($iface =~ m/^tap(\d+)i(\d+)$/) {
 128         $vmid = $1;
 129         $devid = $2;
 130     } elsif ($iface =~ m/^veth(\d+)\.(\d+)$/) {
 131         $vmid = $1;
 132         $devid = $2;
 133     } else {
 134         return undef if $noerr;
 135         die "can't create firewall bridge for random interface name '$iface'\n";
 136     }
 137
 138     return ($vmid, $devid);
 139 };
 140
 141 my $compute_fwbr_names = sub {
 142     my ($vmid, $devid) = @_;
 143
 144     my $fwbr = "fwbr${vmid}i${devid}";
 145     # Note: the firewall use 'fwln+' to filter traffic to VMs
 146     my $vethfw = "fwln${vmid}i${devid}";
 147     my $vethfwpeer = "fwpr${vmid}p${devid}";
 148     my $ovsintport = "fwln${vmid}o${devid}";
 149
 150     return ($fwbr, $vethfw, $vethfwpeer, $ovsintport);
 151 };
 152
 153 my $cond_create_bridge = sub {
 154     my ($bridge) = @_;
 155
 156     if (! -d "/sys/class/net/$bridge") {
 157         system("/sbin/brctl addbr $bridge") == 0 ||
 158             die "can't add bridge '$bridge'\n";
 159     }
 160 };
 161
 162 my $bridge_add_interface = sub {
 163     my ($bridge, $iface) = @_;
 164
 165     system("/sbin/brctl addif $bridge $iface") == 0 ||
 166         die "can't add interface 'iface' to bridge '$bridge'\n";
 167 };
 168
 169 my $ovs_bridge_add_port = sub {
 170     my ($bridge, $iface, $tag, $internal) = @_;
 171
 172     my $cmd = "/usr/bin/ovs-vsctl add-port $bridge $iface";
 173     $cmd .= " tag=$tag" if $tag;
 174     $cmd .= " -- set Interface $iface type=internal" if $internal;
 175     system($cmd) == 0 ||
 176         die "can't add ovs port '$iface'\n";
 177 };
 178
 179 my $activate_interface = sub {
 180     my ($iface) = @_;
 181
 182     system("/sbin/ip link set $iface up") == 0 ||
 183         die "can't activate interface '$iface'\n";
 184 };
 185
 186 sub tap_create {
 187     my ($iface, $bridge) = @_;
 188
 189     die "unable to get bridge setting\n" if !$bridge;
 190
 191     my $bridgemtu = &$read_bridge_mtu($bridge);
 192
 193     eval {
 194         PVE::Tools::run_command("/sbin/ifconfig $iface 0.0.0.0 promisc up mtu $bridgemtu");
 195     };
 196     die "interface activation failed\n" if $@;
 197 }
 198
 199 sub veth_create {
 200     my ($veth, $vethpeer, $bridge, $mac) = @_;
 201
 202     die "unable to get bridge setting\n" if !$bridge;
 203
 204     my $bridgemtu = &$read_bridge_mtu($bridge);
 205
 206     # create veth pair
 207     if (! -d "/sys/class/net/$veth") {
 208         my $cmd = "/sbin/ip link add name $veth type veth peer name $vethpeer mtu $bridgemtu";
 209         $cmd .= " addr $mac" if $mac;
 210         system($cmd) == 0 || die "can't create interface $veth\n";
 211     }
 212
 213     # up vethpair
 214     &$activate_interface($veth);
 215     &$activate_interface($vethpeer);
 216 }
 217
 218 sub veth_delete {
 219     my ($veth) = @_;
 220
 221     if (-d "/sys/class/net/$veth") {
 222         run_command("/sbin/ip link delete dev $veth", outfunc => sub {}, errfunc => sub {});
 223     }
 224
 225 }
 226
 227 my $create_firewall_bridge_linux = sub {
 228     my ($iface, $bridge) = @_;
 229
 230     my ($vmid, $devid) = &$parse_tap_devive_name($iface);
 231     my ($fwbr, $vethfw, $vethfwpeer) = &$compute_fwbr_names($vmid, $devid);
 232
 233     &$cond_create_bridge($fwbr);
 234     &$activate_interface($fwbr);
 235
 236     copy_bridge_config($bridge, $fwbr);
 237     veth_create($vethfw, $vethfwpeer, $bridge);
 238
 239     &$bridge_add_interface($fwbr, $vethfw);
 240     &$bridge_add_interface($bridge, $vethfwpeer);
 241
 242     return $fwbr;
 243 };
 244
 245 my $create_firewall_bridge_ovs = sub {
 246     my ($iface, $bridge, $tag) = @_;
 247
 248     my ($vmid, $devid) = &$parse_tap_devive_name($iface);
 249     my ($fwbr, undef, undef, $ovsintport) = &$compute_fwbr_names($vmid, $devid);
 250
 251     my $bridgemtu = &$read_bridge_mtu($bridge);
 252
 253     &$cond_create_bridge($fwbr);
 254     &$activate_interface($fwbr);
 255
 256     &$bridge_add_interface($fwbr, $iface);
 257
 258     &$ovs_bridge_add_port($bridge, $ovsintport, $tag, 1);
 259     &$activate_interface($ovsintport);
 260
 261     # set the same mtu for ovs int port
 262     PVE::Tools::run_command("/sbin/ifconfig $ovsintport mtu $bridgemtu");
 263
 264     &$bridge_add_interface($fwbr, $ovsintport);
 265 };
 266
 267 my $cleanup_firewall_bridge = sub {
 268     my ($iface) = @_;
 269
 270     my ($vmid, $devid) = &$parse_tap_devive_name($iface, 1);
 271     return if !defined($vmid);
 272     my ($fwbr, $vethfw, $vethfwpeer, $ovsintport) = &$compute_fwbr_names($vmid, $devid);
 273
 274     # cleanup old port config from any openvswitch bridge
 275     if (-d "/sys/class/net/$ovsintport") {
 276         run_command("/usr/bin/ovs-vsctl del-port $ovsintport", outfunc => sub {}, errfunc => sub {});
 277     }
 278
 279     # delete old vethfw interface
 280     veth_delete($vethfw);
 281
 282     # cleanup fwbr bridge
 283     if (-d "/sys/class/net/$fwbr") {
 284         run_command("/sbin/ip link set dev $fwbr down", outfunc => sub {}, errfunc => sub {});
 285         run_command("/sbin/brctl delbr $fwbr", outfunc => sub {}, errfunc => sub {});
 286     }
 287 };
 288
 289 sub tap_plug {
 290     my ($iface, $bridge, $tag, $firewall) = @_;
 291
 292     #cleanup old port config from any openvswitch bridge
 293     eval {run_command("/usr/bin/ovs-vsctl del-port $iface", outfunc => sub {}, errfunc => sub {}) };
 294
 295     if (-d "/sys/class/net/$bridge/bridge") {
 296         &$cleanup_firewall_bridge($iface); # remove stale devices
 297
 298         my $newbridge = activate_bridge_vlan($bridge, $tag);
 299         copy_bridge_config($bridge, $newbridge) if $bridge ne $newbridge;
 300
 301         $newbridge = &$create_firewall_bridge_linux($iface, $newbridge) if $firewall;
 302
 303         &$bridge_add_interface($newbridge, $iface);
 304     } else {
 305         &$cleanup_firewall_bridge($iface); # remove stale devices
 306
 307         if ($firewall) {
 308             &$create_firewall_bridge_ovs($iface, $bridge, $tag);
 309         } else {
 310             &$ovs_bridge_add_port($bridge, $iface, $tag);
 311         }
 312     }
 313 }
 314
 315 sub tap_unplug {
 316     my ($iface) = @_;
 317
 318     my $path= "/sys/class/net/$iface/brport/bridge";
 319     if (-l $path) {
 320         my $bridge = basename(readlink($path));
 321         #avoid insecure dependency;
 322         ($bridge) = $bridge =~ /(\S+)/;
 323
 324         system("/sbin/brctl delif $bridge $iface") == 0 ||
 325             die "can't del interface '$iface' from bridge '$bridge'\n";
 326
 327     }
 328
 329     &$cleanup_firewall_bridge($iface);
 330 }
 331
 332 sub copy_bridge_config {
 333     my ($br0, $br1) = @_;
 334
 335     return if $br0 eq $br1;
 336
 337     my $br_configs = [ 'ageing_time', 'stp_state', 'priority', 'forward_delay',
 338                        'hello_time', 'max_age', 'multicast_snooping', 'multicast_querier'];
 339
 340     foreach my $sysname (@$br_configs) {
 341         eval {
 342             my $v0 = PVE::Tools::file_read_firstline("/sys/class/net/$br0/bridge/$sysname");
 343             my $v1 = PVE::Tools::file_read_firstline("/sys/class/net/$br1/bridge/$sysname");
 344             if ($v0 ne $v1) {
 345                  PVE::ProcFSTools::write_proc_entry("/sys/class/net/$br1/bridge/$sysname", $v0);
 346             }
 347         };
 348         warn $@ if $@;
 349     }
 350 }
 351
 352 sub activate_bridge_vlan_slave {
 353     my ($bridgevlan, $iface, $tag) = @_;
 354     my $ifacevlan = "${iface}.$tag";
 355
 356     # create vlan on $iface is not already exist
 357     if (! -d "/sys/class/net/$ifacevlan") {
 358         system("/sbin/vconfig add $iface $tag") == 0 ||
 359             die "can't add vlan tag $tag to interface $iface\n";
 360     }
 361
 362     # be sure to have the $ifacevlan up
 363     &$activate_interface($ifacevlan);
 364
 365     # test if $vlaniface is already enslaved in another bridge
 366     my $path= "/sys/class/net/$ifacevlan/brport/bridge";
 367     if (-l $path) {
 368         my $tbridge = basename(readlink($path));
 369         if ($tbridge ne $bridgevlan) {
 370             die "interface $ifacevlan already exist in bridge $tbridge\n";
 371         } else {
 372             # Port already attached to bridge: do nothing.
 373             return;
 374         }
 375     }
 376
 377     # add $ifacevlan to the bridge
 378     &$bridge_add_interface($bridgevlan, $ifacevlan);
 379 }
 380
 381 sub activate_bridge_vlan {
 382     my ($bridge, $tag_param) = @_;
 383
 384     die "bridge '$bridge' is not active\n" if ! -d "/sys/class/net/$bridge";
 385
 386     return $bridge if !defined($tag_param); # no vlan, simply return
 387
 388     my $tag = int($tag_param);
 389
 390     die "got strange vlan tag '$tag_param'\n" if $tag < 1 || $tag > 4094;
 391
 392     my $bridgevlan = "${bridge}v$tag";
 393
 394     my @ifaces = ();
 395     my $dir = "/sys/class/net/$bridge/brif";
 396     PVE::Tools::dir_glob_foreach($dir, '((eth|bond)\d+)', sub {
 397         push @ifaces, $_[0];
 398     });
 399
 400     die "no physical interface on bridge '$bridge'\n" if scalar(@ifaces) == 0;
 401
 402     # add bridgevlan if it doesn't already exist
 403     if (! -d "/sys/class/net/$bridgevlan") {
 404         system("/sbin/brctl addbr $bridgevlan") == 0 ||
 405             die "can't add bridge $bridgevlan\n";
 406     }
 407
 408     # for each physical interface (eth or bridge) bind them to bridge vlan
 409     foreach my $iface (@ifaces) {
 410         activate_bridge_vlan_slave($bridgevlan, $iface, $tag);
 411     }
 412
 413     #fixme: set other bridge flags
 414
 415     # be sure to have the bridge up
 416     system("/sbin/ip link set $bridgevlan up") == 0 ||
 417         die "can't up bridge $bridgevlan\n";
 418
 419     return $bridgevlan;
 420 }
 421
 422 1;