package PVE::Network; use strict; use warnings; use PVE::Tools qw(run_command); use PVE::ProcFSTools; use PVE::INotify; use File::Basename; # host network related utility functions sub setup_tc_rate_limit { my ($iface, $rate, $burst, $debug) = @_; system("/sbin/tc class del dev $iface parent 1: classid 1:1 >/dev/null 2>&1"); system("/sbin/tc filter del dev $iface parent ffff: protocol ip prio 50 estimator 1sec 8sec >/dev/null 2>&1"); system("/sbin/tc qdisc del dev $iface ingress >/dev/null 2>&1"); system("/sbin/tc qdisc del dev $iface root >/dev/null 2>&1"); return if !$rate; run_command("/sbin/tc qdisc add dev $iface handle ffff: ingress"); # this does not work wit virtio - don't know why (setting "mtu 64kb" does not help) #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"); # so we use avrate instead run_command("/sbin/tc filter add dev $iface parent ffff: " . "protocol ip prio 50 estimator 1sec 8sec " . "u32 match ip src 0.0.0.0/0 police avrate ${rate}bps drop flowid :1"); # tbf does not work for unknown reason #$TC qdisc add dev $DEV root tbf rate $RATE latency 100ms burst $BURST # so we use htb instead run_command("/sbin/tc qdisc add dev $iface root handle 1: htb default 1"); run_command("/sbin/tc class add dev $iface parent 1: classid 1:1 " . "htb rate ${rate}bps burst ${burst}b"); if ($debug) { print "DEBUG tc settings\n"; system("/sbin/tc qdisc ls dev $iface"); system("/sbin/tc class ls dev $iface"); system("/sbin/tc filter ls dev $iface parent ffff:"); } } sub tap_rate_limit { my ($iface, $rate) = @_; my $debug = 0; $rate = int($rate*1024*1024); my $burst = 1024*1024; setup_tc_rate_limit($iface, $rate, $burst, $debug); } my $read_bridge_mtu = sub { my ($bridge) = @_; my $mtu = PVE::Tools::file_read_firstline("/sys/class/net/$bridge/mtu"); die "bridge '$bridge' does not exist\n" if !$mtu; # avoid insecure dependency; die "unable to parse mtu value" if $mtu !~ /^(\d+)$/; $mtu = int($1); return $mtu; }; my $parse_tap_devive_name = sub { my ($iface) = @_; my ($vmid, $devid); if ($iface =~ m/^tap(\d+)i(\d+)$/) { $vmid = $1; $devid = $2; } elsif ($iface =~ m/^veth(\d+)\.(\d+)$/) { $vmid = $1; $devid = $2; } else { die "wrong interface name $iface"; } return ($vmid, $devid); }; my $compute_fwbr_names = sub { my ($vmid, $devid) = @_; my $fwbr = "fwbr${vmid}i${devid}"; my $vethfw = "link${vmid}i${devid}"; my $vethfwpeer = "link${vmid}p${devid}"; my $ovsintport = "link${vmid}o${devid}"; return ($fwbr, $vethfw, $vethfwpeer, $ovsintport); }; my $cond_create_bridge = sub { my ($bridge) = @_; if (! -d "/sys/class/net/$bridge") { system("/sbin/brctl addbr $bridge") == 0 || die "can't add bridge '$bridge'\n"; } }; my $bridge_add_interface = sub { my ($bridge, $iface) = @_; system("/sbin/brctl addif $bridge $iface") == 0 || die "can't add interface 'iface' to bridge '$bridge'\n"; }; my $ovs_bridge_add_port = sub { my ($bridge, $iface, $tag, $internal) = @_; my $cmd = "/usr/bin/ovs-vsctl add-port $bridge $iface"; $cmd .= " tag=$tag" if $tag; $cmd .= " -- set Interface $iface type=internal" if $internal; system($cmd) == 0 || die "can't add ovs port '$iface'\n"; }; my $activate_interface = sub { my ($iface) = @_; system("/sbin/ip link set $iface up") == 0 || die "can't activate interface '$iface'\n"; }; sub tap_create { my ($iface, $bridge) = @_; die "unable to get bridge setting\n" if !$bridge; my $bridgemtu = &$read_bridge_mtu($bridge); eval { PVE::Tools::run_command("/sbin/ifconfig $iface 0.0.0.0 promisc up mtu $bridgemtu"); }; die "interface activation failed\n" if $@; } my $create_firewall_bridge_linux = sub { my ($iface, $bridge) = @_; my ($vmid, $devid) = &$parse_tap_devive_name($iface); my ($fwbr, $vethfw, $vethfwpeer) = &$compute_fwbr_names($vmid, $devid); my $bridgemtu = &$read_bridge_mtu($bridge); &$cond_create_bridge($fwbr); &$activate_interface($fwbr); copy_bridge_config($bridge, $fwbr); # create veth pair if (! -d "/sys/class/net/$vethfw") { system("/sbin/ip link add name $vethfw type veth peer name $vethfwpeer mtu $bridgemtu") == 0 || die "can't create interface $vethfw\n"; } # up vethpair &$activate_interface($vethfw); &$activate_interface($vethfwpeer); &$bridge_add_interface($bridge, $vethfw); &$bridge_add_interface($fwbr, $vethfwpeer); return $fwbr; }; my $create_firewall_bridge_ovs = sub { my ($iface, $bridge, $tag) = @_; my ($vmid, $devid) = &$parse_tap_devive_name($iface); my ($fwbr, undef, undef, $ovsintport) = &$compute_fwbr_names($vmid, $devid); my $bridgemtu = &$read_bridge_mtu($bridge); &$cond_create_bridge($fwbr); &$activate_interface($fwbr); &$bridge_add_interface($fwbr, $iface); &$ovs_bridge_add_port($bridge, $ovsintport, $tag, 1); # set the same mtu for ovs int port PVE::Tools::run_command("/sbin/ifconfig $ovsintport mtu $bridgemtu"); &$bridge_add_interface($fwbr, $ovsintport); }; my $cleanup_firewall_bridge = sub { my ($iface) = @_; my ($vmid, $devid) = &$parse_tap_devive_name($iface); my ($fwbr, $vethfw, $vethfwpeer, $ovsintport) = &$compute_fwbr_names($vmid, $devid); # cleanup old port config from any openvswitch bridge if (-d "/sys/class/net/$ovsintport") { run_command("/usr/bin/ovs-vsctl del-port $ovsintport", outfunc => sub {}, errfunc => sub {}); } # delete old vethfw interface if (-d "/sys/class/net/$vethfw") { run_command("/sbin/ip link delete dev $vethfw", outfunc => sub {}, errfunc => sub {}); } # cleanup fwbr bridge if (-d "/sys/class/net/$fwbr") { run_command("/sbin/ip link set dev $fwbr down", outfunc => sub {}, errfunc => sub {}); run_command("/sbin/brctl delbr $fwbr", outfunc => sub {}, errfunc => sub {}); } }; sub tap_plug { my ($iface, $bridge, $tag, $firewall) = @_; #cleanup old port config from any openvswitch bridge eval {run_command("/usr/bin/ovs-vsctl del-port $iface", outfunc => sub {}, errfunc => sub {}) }; if (-d "/sys/class/net/$bridge/bridge") { &$cleanup_firewall_bridge($iface); # remove stale devices my $newbridge = activate_bridge_vlan($bridge, $tag); copy_bridge_config($bridge, $newbridge) if $bridge ne $newbridge; $newbridge = &$create_firewall_bridge_linux($iface, $newbridge) if $firewall; &$bridge_add_interface($newbridge, $iface); } else { &$cleanup_firewall_bridge($iface); # remove stale devices if ($firewall) { &$create_firewall_bridge_ovs($iface, $bridge, $tag); } else { &$ovs_bridge_add_port($bridge, $iface, $tag); } } } sub tap_unplug { my ($iface) = @_; my $path= "/sys/class/net/$iface/brport/bridge"; if (-l $path) { my $bridge = basename(readlink($path)); #avoid insecure dependency; ($bridge) = $bridge =~ /(\S+)/; system("/sbin/brctl delif $bridge $iface") == 0 || die "can't del interface '$iface' from bridge '$bridge'\n"; } &$cleanup_firewall_bridge($iface); } sub copy_bridge_config { my ($br0, $br1) = @_; return if $br0 eq $br1; my $br_configs = [ 'ageing_time', 'stp_state', 'priority', 'forward_delay', 'hello_time', 'max_age', 'multicast_snooping', 'multicast_querier']; foreach my $sysname (@$br_configs) { eval { my $v0 = PVE::Tools::file_read_firstline("/sys/class/net/$br0/bridge/$sysname"); my $v1 = PVE::Tools::file_read_firstline("/sys/class/net/$br1/bridge/$sysname"); if ($v0 ne $v1) { PVE::ProcFSTools::write_proc_entry("/sys/class/net/$br1/bridge/$sysname", $v0); } }; warn $@ if $@; } } sub activate_bridge_vlan_slave { my ($bridgevlan, $iface, $tag) = @_; my $ifacevlan = "${iface}.$tag"; # create vlan on $iface is not already exist if (! -d "/sys/class/net/$ifacevlan") { system("/sbin/vconfig add $iface $tag") == 0 || die "can't add vlan tag $tag to interface $iface\n"; } # be sure to have the $ifacevlan up &$activate_interface($ifacevlan); # test if $vlaniface is already enslaved in another bridge my $path= "/sys/class/net/$ifacevlan/brport/bridge"; if (-l $path) { my $tbridge = basename(readlink($path)); if ($tbridge ne $bridgevlan) { die "interface $ifacevlan already exist in bridge $tbridge\n"; } else { # Port already attached to bridge: do nothing. return; } } # add $ifacevlan to the bridge &$bridge_add_interface($bridgevlan, $ifacevlan); } sub activate_bridge_vlan { my ($bridge, $tag_param) = @_; die "bridge '$bridge' is not active\n" if ! -d "/sys/class/net/$bridge"; return $bridge if !defined($tag_param); # no vlan, simply return my $tag = int($tag_param); die "got strange vlan tag '$tag_param'\n" if $tag < 1 || $tag > 4094; my $bridgevlan = "${bridge}v$tag"; my @ifaces = (); my $dir = "/sys/class/net/$bridge/brif"; PVE::Tools::dir_glob_foreach($dir, '((eth|bond)\d+)', sub { push @ifaces, $_[0]; }); die "no physical interface on bridge '$bridge'\n" if scalar(@ifaces) == 0; # add bridgevlan if it doesn't already exist if (! -d "/sys/class/net/$bridgevlan") { system("/sbin/brctl addbr $bridgevlan") == 0 || die "can't add bridge $bridgevlan\n"; } # for each physical interface (eth or bridge) bind them to bridge vlan foreach my $iface (@ifaces) { activate_bridge_vlan_slave($bridgevlan, $iface, $tag); } #fixme: set other bridge flags # be sure to have the bridge up system("/sbin/ip link set $bridgevlan up") == 0 || die "can't up bridge $bridgevlan\n"; return $bridgevlan; } 1;