X-Git-Url: https://git.proxmox.com/?p=pve-common.git;a=blobdiff_plain;f=src%2FPVE%2FINotify.pm;h=2bb87bb2dd71e79057dcaa2da391316686e7bc23;hp=b39748c56310d1cbabf877ef4e697eb3e8828de2;hb=9ca89b8722fb9656b5deaca037f0612aab3170e4;hpb=b1d7951f61a07529ddc6d24aa63ffe9185c53d98

diff --git a/src/PVE/INotify.pm b/src/PVE/INotify.pm
index b39748c..2bb87bb 100644
--- a/src/PVE/INotify.pm
+++ b/src/PVE/INotify.pm
@@ -1,23 +1,29 @@
 package PVE::INotify;
 
 # todo: maybe we do not need update_file() ?
-
 use strict;
 use warnings;
 
-use POSIX;
-use IO::File;
-use IO::Dir;
-use File::stat;
-use File::Basename;
+use Clone qw(clone);
+use Digest::SHA;
+use Encode qw(encode decode);
 use Fcntl qw(:DEFAULT :flock);
-use PVE::SafeSyslog;
+use File::Basename;
+use File::stat;
+use IO::Dir;
+use IO::File;
+use JSON;
+use Linux::Inotify2;
+use POSIX;
+
 use PVE::Exception qw(raise_param_exc);
+use PVE::JSONSchema;
+use PVE::Network;
+use PVE::ProcFSTools;
+use PVE::SafeSyslog;
 use PVE::Tools;
-use Storable qw(dclone);            
-use Linux::Inotify2;
+
 use base 'Exporter';
-use JSON; 
 
 our @EXPORT_OK = qw(read_file write_file register_file);
 
@@ -54,13 +60,11 @@ sub ccache_compute_diff {
 
     my $diff = '';
 
-    open (TMP, "diff -b -N -u '$filename' '$shadow'|");
-	
-    while (my $line = <TMP>) {
-	$diff .= $line;
-    }
-
-    close (TMP);
+    my $cmd = ['/usr/bin/diff', '-b', '-N', '-u', $filename, $shadow];
+    PVE::Tools::run_command($cmd, noerr => 1, outfunc => sub {
+	my ($line) = @_;
+	$diff .= decode('UTF-8', $line) . "\n";
+    });
 
     $diff = undef if !$diff;
 
@@ -81,15 +85,15 @@ sub ccache_info {
 		    $cp->{$k} = $v;
 		}
 		$ccache->{$filename} = $cp;
-	    } 
+	    }
 	    return ($ccache->{$filename}, $filename);
 	}
     }
- 
+
     $filename = $ccachemap->{$filename} if defined ($ccachemap->{$filename});
 
     die "file '$filename' not added :ERROR" if !defined ($ccache->{$filename});
-   
+
     return ($ccache->{$filename}, $filename);
 }
 
@@ -132,7 +136,7 @@ sub write_file {
     if (!rename($tmpname, $realname)) {
 	my $msg = "close (rename) atomic file '$filename' failed: $!\n";
 	unlink $tmpname;
-	die $msg;	
+	die $msg;
     }
 
     my $diff;
@@ -165,7 +169,7 @@ sub update_file {
     my $code = sub {
 
 	$fd = IO::File->new ($filename, "r");
-	
+
 	my $new = &$update($filename, $fd, $data, @args);
 
 	if (defined($new)) {
@@ -197,23 +201,29 @@ sub discard_changes {
     return read_file ($filename, $full);
 }
 
+sub poll_changes {
+    my ($filename) = @_;
+
+    poll() if $inotify; # read new inotify events
+
+    $versions->{$filename} = 0 if !defined ($versions->{$filename});
+
+    return $versions->{$filename};
+}
+
 sub read_file {
     my ($fileid, $full) = @_;
 
     my $parser;
 
     my ($ccinfo, $filename) = ccache_info($fileid);
-     
+
     $parser = $ccinfo->{parser};
- 
+
     my $fd;
     my $shadow;
 
-    poll() if $inotify; # read new inotify events
-
-    $versions->{$filename} = 0 if !defined ($versions->{$filename});
-
-    my $cver = $versions->{$filename};
+    my $cver = poll_changes($filename);
 
     if (my $copy = $shadowfiles->{$filename}) {
 	if ($fd = IO::File->new ($copy, "r")) {
@@ -229,7 +239,7 @@ sub read_file {
 
     if (!$fd) {
 	$ccinfo->{version} = undef;
-	$ccinfo->{data} = undef; 
+	$ccinfo->{data} = undef;
 	$ccinfo->{diff} = undef;
 	return undef if !$acp;
     }
@@ -238,20 +248,20 @@ sub read_file {
 
     # file unchanged?
     if (!$ccinfo->{nocache} &&
-	$inotify && $versions->{$filename} &&
+	$inotify && $cver &&
 	defined ($ccinfo->{data}) &&
 	defined ($ccinfo->{version}) &&
 	($ccinfo->{readonce} ||
-	 ($ccinfo->{version} == $versions->{$filename}))) {
+	 ($ccinfo->{version} == $cver))) {
 
 	my $ret;
 	if (!$noclone && ref ($ccinfo->{data})) {
-	    $ret->{data} = dclone ($ccinfo->{data});
+	    $ret->{data} = clone ($ccinfo->{data});
 	} else {
 	    $ret->{data} = $ccinfo->{data};
 	}
 	$ret->{changes} = $ccinfo->{diff};
-	
+
 	return $full ? $ret : $ret->{data};
     }
 
@@ -268,7 +278,7 @@ sub read_file {
     }
 
     # we cache data with references, so we always need to
-    # dclone this data. Else the original data may get
+    # clone this data. Else the original data may get
     # modified.
     $ccinfo->{data} = $res;
 
@@ -277,14 +287,14 @@ sub read_file {
 
     my $ret;
     if (!$noclone && ref ($ccinfo->{data})) {
-	$ret->{data} = dclone ($ccinfo->{data});
+	$ret->{data} = clone ($ccinfo->{data});
     } else {
 	$ret->{data} = $ccinfo->{data};
     }
     $ret->{changes} = $ccinfo->{diff};
 
     return $full ? $ret : $ret->{data};
-}    
+}
 
 sub parse_ccache_options {
     my ($ccinfo, %options) = @_;
@@ -303,7 +313,7 @@ sub parse_ccache_options {
 	    # noclone flag for large read-only data chunks like aplinfo
 	    $ccinfo->{$opt} = $v;
 	} elsif ($opt eq 'always_call_parser') {
-	    # when set, we call parser even when the file does not exists.
+	    # when set, we call parser even when the file does not exist.
 	    # this allows the parser to return some default
 	    $ccinfo->{$opt} = $v;
 	} else {
@@ -328,7 +338,7 @@ sub register_file {
     $ccinfo->{update} = $update;
 
     parse_ccache_options($ccinfo, %options);
-    
+
     if ($options{shadow}) {
 	$shadowfiles->{$filename} = $options{shadow};
     }
@@ -340,11 +350,11 @@ sub register_file {
 sub register_regex {
     my ($dir, $regex, $parser, $writer, $update, %options) = @_;
 
-    die "can't register regex after initify_init" if $inotify;
+    die "can't register regex after inotify_init" if $inotify;
 
     my $uid = "$dir/$regex";
     die "regular expression '$uid' already added :ERROR" if defined ($ccacheregex->{$uid});
- 
+
     my $ccinfo = {};
 
     $ccinfo->{dir} = $dir;
@@ -408,7 +418,7 @@ sub inotify_init {
 
     foreach my $uid (keys %$ccacheregex) {
 	my $ccinfo = $ccacheregex->{$uid};
-	$dirhash->{$ccinfo->{dir}}->{_regex} = 1;	
+	$dirhash->{$ccinfo->{dir}}->{_regex} = 1;
     }
 
     $inotify_pid = $$;
@@ -438,7 +448,7 @@ sub inotify_init {
 		syslog ('err', "got 'unmount' event on '$name' - disabling inotify");
 		$inotify = undef;
 	    }
-	    if ($e->IN_IGNORED) { 
+	    if ($e->IN_IGNORED) {
 		syslog ('err', "got 'ignored' event on '$name' - disabling inotify");
 		$inotify = undef;
 	    }
@@ -471,7 +481,7 @@ sub inotify_init {
 		    next if $dir ne $ccinfo->{dir};
 		    my $re = $ccinfo->{regex};
 		    if (my $fd = IO::Dir->new ($dir)) {
-			while (defined(my $de = $fd->read)) { 
+			while (defined(my $de = $fd->read)) {
 			    if ($de =~ m/^$re$/) {
 				my $fn = "$dir/$de";
 				$versions->{$fn}++; # init with version
@@ -526,10 +536,58 @@ sub write_etc_hostname {
     return $hostname;
 }
 
-register_file('hostname', "/etc/hostname",  
-	      \&read_etc_hostname, 
+register_file('hostname', "/etc/hostname",
+	      \&read_etc_hostname,
 	      \&write_etc_hostname);
 
+sub read_etc_hosts {
+    my ($filename, $fh) = @_;
+
+    my $raw = '';
+    my $data = '';
+
+    while (my $line = <$fh>) {
+	$raw .= $line;
+	if ($line =~ m/^\s*#/) {
+	    $line = decode('UTF-8', $line);
+	}
+	$data .= $line;
+    }
+
+    return {
+	digest => Digest::SHA::sha1_hex($raw),
+	data => $data,
+    }
+}
+
+sub write_etc_hosts {
+    my ($filename, $fh, $hosts, @args) = @_;
+
+    # check validity of ips/names
+    for my $line (split("\n", $hosts)) {
+	next if $line =~ m/^\s*#/; # comments
+	next if $line =~ m/^\s*$/; # whitespace/empty lines
+
+	my ($ip, @names) = split(/\s+/, $line);
+
+	raise_param_exc({ 'data' => "Invalid IP '$ip'" })
+	    if $ip !~ m/^$PVE::Tools::IPRE$/;
+
+	for my $name (@names) {
+	    raise_param_exc({ 'data' => "Invalid Hostname '$name'" })
+		if $name !~ m/^[.\-a-zA-Z0-9]+$/;
+	}
+    }
+
+    die "write failed: $!" if !print $fh encode('UTF-8', $hosts);
+
+    return $hosts;
+}
+
+register_file('etchosts', "/etc/hosts",
+	      \&read_etc_hosts,
+	      \&write_etc_hosts);
+
 sub read_etc_resolv_conf {
     my ($filename, $fh) = @_;
 
@@ -540,7 +598,7 @@ sub read_etc_resolv_conf {
 	chomp $line;
 	if ($line =~ m/^(search|domain)\s+(\S+)\s*/) {
 	    $res->{search} = $2;
-	} elsif ($line =~ m/^nameserver\s+(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})\s*/) {
+	} elsif ($line =~ m/^\s*nameserver\s+($PVE::Tools::IPRE)\s*/) {
 	    $nscount++;
 	    if ($nscount <= 3) {
 		$res->{"dns$nscount"} = $1;
@@ -572,12 +630,12 @@ sub update_etc_resolv_conf {
 	next if $line =~ m/^(search|domain|nameserver)\s+/;
 	$data .= $line
     }
-    
+
     return $data;
 }
 
-register_file('resolvconf', "/etc/resolv.conf", 
-	      \&read_etc_resolv_conf, undef, 
+register_file('resolvconf', "/etc/resolv.conf",
+	      \&read_etc_resolv_conf, undef,
 	      \&update_etc_resolv_conf);
 
 sub read_etc_timezone {
@@ -607,8 +665,8 @@ sub write_etc_timezone {
 
 }
 
-register_file('timezone', "/etc/timezone", 
-	      \&read_etc_timezone, 
+register_file('timezone', "/etc/timezone",
+	      \&read_etc_timezone,
 	      \&write_etc_timezone);
 
 sub read_active_workers {
@@ -616,7 +674,7 @@ sub read_active_workers {
 
     return [] if !$fh;
 
-    my $res = []; 
+    my $res = [];
     while (defined (my $line = <$fh>)) {
 	if ($line =~ m/^(\S+)\s(0|1)(\s([0-9A-Za-z]{8})(\s(\s*\S.*))?)?$/) {
 	    my $upid = $1;
@@ -648,9 +706,9 @@ sub write_active_workers {
 	my $saved = $task->{saved} ? 1 : 0;
 	if ($task->{endtime}) {
 	    if ($task->{status}) {
-		$raw .= sprintf("$upid $saved %08X $task->{status}\n", $task->{endtime});
+		$raw .= sprintf("%s %s %08X %s\n", $upid, $saved, $task->{endtime}, $task->{status});
 	    } else {
-		$raw .= sprintf("$upid $saved %08X\n", $task->{endtime});
+		$raw .= sprintf("%s %s %08X\n", $upid, $saved, $task->{endtime});
 	    }
 	} else {
 	    $raw .= "$upid $saved\n";
@@ -660,12 +718,12 @@ sub write_active_workers {
     PVE::Tools::safe_print($filename, $fh, $raw) if $raw;
 }
 
-register_file('active', "/var/log/pve/tasks/active", 
+register_file('active', "/var/log/pve/tasks/active",
 	      \&read_active_workers,
 	      \&write_active_workers);
 
 
-my $bond_modes = { 'balance-rr' => 0,
+our $bond_modes = { 'balance-rr' => 0,
 		   'active-backup' => 1,
 		   'balance-xor' => 2,
 		   'broadcast' => 3,
@@ -678,7 +736,7 @@ my $ovs_bond_modes = {
     'active-backup' => 1,
     'balance-slb' => 1,
     'lacp-balance-slb' => 1,
-    'lacp-balance-tcp' => 1, 
+    'lacp-balance-tcp' => 1,
 };
 
 #sub get_bond_modes {
@@ -745,51 +803,132 @@ my $extract_ovs_option = sub {
     return $v;
 };
 
+my $check_mtu = sub {
+    my ($ifaces, $parent, $child) = @_;
+
+    die "check mtu - missing parent interface\n" if !$parent;
+    die "check mtu - missing child interface\n" if !$child;
+
+    my $cmtu = $ifaces->{$child}->{mtu};
+    return if !$cmtu;
+
+    my $parentdata = $ifaces->{$parent};
+    my $pmtu = $parentdata->{mtu};
+    $pmtu = $cmtu if $parentdata->{type} eq 'bond' && !$pmtu;
+    $pmtu = 1500 if !$pmtu;
+
+    die "interface '$parent' - mtu $pmtu is lower than '$child' - mtu $cmtu\n"
+	if $pmtu < $cmtu;
+};
+
+# config => {
+#   ifaces => {
+#     $ifname => {
+#       <optional> exists => BOOL,
+#       <optional> active => BOOL,
+#       <optional> autostart => BOOL,
+#       <auto> priority => INT,
+#
+#       type => "eth" | "bridge" | "bond" | "loopback" | "OVS*" | ... ,
+#
+#       families => ["inet", "inet6", ...],
+#
+#       method => "manual" | "static" | "dhcp" | ... ,
+#       address => IP,
+#       netmask => SUBNET,
+#       broadcast => IP,
+#       gateway => IP,
+#       comments => [ "..." ],
+#
+#       method6 => "manual" | "static" | "dhcp" | ... ,
+#       address6 => IP,
+#       netmask6 => SUBNET,
+#       gateway6 => IP,
+#       comments6 => [ "..." ],
+#
+#       <known options>, # like bridge_ports, ovs_*
+#
+#       # extra/unknown options stored by-family:
+#       options => { <inet options>... }
+#       options6 => { <inet6 options>... }
+#     }
+#   },
+#   options => [
+#     # mappings end up here as well, as we don't need to understand them
+#     [priority,line]
+#   ]
+# }
 sub read_etc_network_interfaces {
     my ($filename, $fh) = @_;
+    my $proc_net_dev = IO::File->new('/proc/net/dev', 'r');
+    my $active = PVE::ProcFSTools::get_active_network_interfaces();
+    return __read_etc_network_interfaces($fh, $proc_net_dev, $active);
+}
 
-    my $ifaces = {};
+sub __read_etc_network_interfaces {
+    my ($fh, $proc_net_dev, $active_ifaces) = @_;
+
+    my $config = {};
+    my $ifaces = $config->{ifaces} = {};
+    my $options = $config->{options} = [];
+
+    my $options_alternatives = {
+	'ovs_mtu'     => 'mtu',
+	'bond-slaves' => 'slaves',
+	'bond_slaves' => 'slaves',
+	'bond-xmit-hash-policy' => 'bond_xmit_hash_policy',
+	'bond-mode' => 'bond_mode',
+	'bond-miimon' =>'bond_miimon',
+	'bridge-vlan-aware' => 'bridge_vlan_aware',
+	'bridge-fd' => 'bridge_fd',
+	'bridge-stp' => 'bridge_stp',
+	'bridge-ports' => 'bridge_ports',
+	'bridge-vids' => 'bridge_vids'
+    };
 
     my $line;
 
-    if (my $fd2 = IO::File->new("/proc/net/dev", "r")) {
-	while (defined ($line = <$fd2>)) {
-	    if ($line =~ m/^\s*(eth\d+):.*/) {
+    if ($proc_net_dev) {
+	while (defined ($line = <$proc_net_dev>)) {
+	    if ($line =~ m/^\s*($PVE::Network::PHYSICAL_NIC_RE):.*/) {
 		$ifaces->{$1}->{exists} = 1;
 	    }
 	}
-	close($fd2);
+	close($proc_net_dev);
     }
 
     # we try to keep order inside the file
-    my $priority = 2; # 1 is reserved for lo 
-
-    my $gateway = 0;
+    my $priority = 2; # 1 is reserved for lo
 
     SECTION: while (defined ($line = <$fh>)) {
 	chomp ($line);
 	next if $line =~ m/^\s*#/;
- 
-	if ($line =~ m/^\s*auto\s+(.*)$/) {
-	    my @aa = split (/\s+/, $1);
+	next if $line =~ m/^\s*(allow-hotplug)\s+(.*)$/;
+
+	if ($line =~ m/^\s*(auto|allow-ovs)\s+(.*)$/) {
+	    my @aa = split (/\s+/, $2);
 
 	    foreach my $a (@aa) {
 		$ifaces->{$a}->{autostart} = 1;
 	    }
 
-	} elsif ($line =~ m/^\s*iface\s+(\S+)\s+inet\s+(\S+)\s*$/) {
+	} elsif ($line =~ m/^\s*iface\s+(\S+)\s+(inet6?)\s+(\S+)\s*$/) {
 	    my $i = $1;
-	    $ifaces->{$i}->{method} = $2;
-	    $ifaces->{$i}->{priority} = $priority++;
+	    my $family = $2;
+	    my $f = { method => $3 }; # by family, merged to $d with a $suffix
+	    (my $suffix = $family) =~ s/^inet//;
+
+	    my $d = $ifaces->{$i} ||= {};
+	    $d->{priority} = $priority++ if !$d->{priority};
+	    push @{$d->{families}}, $family;
 
-	    my $d = $ifaces->{$i};
 	    while (defined ($line = <$fh>)) {
-		chomp $line;
+		$line =~ s/\s+$//; # drop trailing whitespaces
+
 		if ($line =~ m/^\s*#(.*?)\s*$/) {
-		    # NOTE: we use 'comments' instead of 'comment' to 
-		    # avoid automatic utf8 conversion
-		    $d->{comments} = '' if !$d->{comments};
-		    $d->{comments} .= "$1\n";
+		    $f->{comments} = '' if !$f->{comments};
+		    my $comment = decode('UTF-8', $1);
+		    $f->{comments} .= "$comment\n";
 		} elsif ($line =~ m/^\s*(?:iface\s
                                           |mapping\s
                                           |auto\s
@@ -801,13 +940,38 @@ sub read_etc_network_interfaces {
 		} elsif ($line =~ m/^\s*((\S+)\s+(.+))$/) {
 		    my $option = $1;
 		    my ($id, $value) = ($2, $3);
-		    if (($id eq 'address') || ($id eq 'netmask') || ($id eq 'broadcast')) {
-			$d->{$id} = $value;
-		    } elsif ($id eq 'gateway') {
-			$d->{$id} = $value;
-			$gateway = 1;
-		    } elsif ($id eq 'ovs_type' || $id eq 'ovs_options'|| $id eq 'ovs_bridge' ||
-			     $id eq 'ovs_bonds' || $id eq 'ovs_ports') {
+
+		    $id = $options_alternatives->{$id} if $options_alternatives->{$id};
+
+		    my $simple_options = {
+			'mtu' => 1,
+			'ovs_type' => 1,
+			'ovs_options' => 1,
+			'ovs_bridge' => 1,
+			'ovs_bonds' => 1,
+			'ovs_ports' => 1,
+			'bridge_fd' => 1,
+			'bridge_vids' => 1,
+			'bridge-access' => 1,
+			'bridge-learning' => 1,
+			'bridge-arp-nd-suppress' => 1,
+			'bridge-unicast-flood' => 1,
+			'bridge-multicast-flood' => 1,
+			'bond_miimon' => 1,
+			'bond_xmit_hash_policy' => 1,
+			'bond-primary' => 1,
+			'uplink-id' => 1,
+			'vlan-protocol' => 1,
+			'vlan-raw-device' => 1,
+			'vlan-id' => 1,
+			'vxlan-id' => 1,
+			'vxlan-svcnodeip' => 1,
+			'vxlan-physdev' => 1,
+			'vxlan-local-tunnelip' => 1 };
+
+		    if (($id eq 'address') || ($id eq 'netmask') || ($id eq 'broadcast') || ($id eq 'gateway')) {
+			$f->{$id} = $value;
+		    } elsif ($simple_options->{$id}) {
 			$d->{$id} = $value;
 		    } elsif ($id eq 'slaves' || $id eq 'bridge_ports') {
 			my $devs = {};
@@ -816,19 +980,19 @@ sub read_etc_network_interfaces {
 			    $devs->{$p} = 1;
 			}
 			my $str = join (' ', sort keys %{$devs});
-			$d->{$id} = $str || '';
+			if ($d->{$id}) {
+			    $d->{$id} .= ' ' . $str if $str;
+			} else {
+			    $d->{$id} = $str || '';
+			}
 		    } elsif ($id eq 'bridge_stp') {
 			if ($value =~ m/^\s*(on|yes)\s*$/i) {
 			    $d->{$id} = 'on';
 			} else {
 			    $d->{$id} = 'off';
 			}
-		    } elsif ($id eq 'bridge_fd') {
-			$d->{$id} = $value;
-		    } elsif ($id eq 'bond_miimon') {
-			$d->{$id} = $value;
-		    } elsif ($id eq 'bond_xmit_hash_policy') {
-			$d->{$id} = $value;
+		    } elsif ($id eq 'bridge_vlan_aware') {
+			$d->{$id} = 1;
 		    } elsif ($id eq 'bond_mode') {
 			# always use names
 			foreach my $bm (keys %$bond_modes) {
@@ -839,19 +1003,28 @@ sub read_etc_network_interfaces {
 			    }
 			}
 			$d->{$id} = $value;
+		    } elsif ($id eq 'vxlan-remoteip') {
+			push @{$d->{$id}}, $value;
 		    } else {
-			push @{$d->{options}}, $option;
+			push @{$f->{options}}, $option;
 		    }
 		} else {
 		    last;
 		}
 	    }
+	    $d->{"$_$suffix"} = $f->{$_} foreach (keys %$f);
 	    last SECTION if !defined($line);
 	    redo SECTION;
+	} elsif ($line =~ /\w/) {
+	    push @$options, [$priority++, $line];
 	}
     }
 
-
+    foreach my $ifname (@$active_ifaces) {
+	if (my $iface = $ifaces->{$ifname}) {
+	    $iface->{active} = 1;
+	}
+    }
 
     if (!$ifaces->{lo}) {
 	$ifaces->{lo}->{priority} = 1;
@@ -862,6 +1035,7 @@ sub read_etc_network_interfaces {
 
     foreach my $iface (keys %$ifaces) {
 	my $d = $ifaces->{$iface};
+	$d->{type} = 'unknown';
 	if ($iface =~ m/^bond\d+$/) {
 	    if (!$d->{ovs_type}) {
 		$d->{type} = 'bond';
@@ -881,8 +1055,6 @@ sub read_etc_network_interfaces {
 		}
 		my $tag = &$extract_ovs_option($d, 'tag');
 		$d->{ovs_tag} = $tag if defined($tag);
-	    } else {
-		$d->{type} = 'unknown';
 	    }
 	} elsif ($iface =~ m/^vmbr\d+$/) {
 	    if (!$d->{ovs_type}) {
@@ -896,8 +1068,6 @@ sub read_etc_network_interfaces {
 		}
 	    } elsif ($d->{ovs_type} eq 'OVSBridge') {
 		$d->{type} = $d->{ovs_type};
-	    } else {
-		$d->{type} = 'unknown';
 	    }
 	} elsif ($iface =~ m/^(\S+):\d+$/) {
 	    $d->{type} = 'alias';
@@ -907,94 +1077,239 @@ sub read_etc_network_interfaces {
 		$ifaces->{$1}->{exists} = 0;
 		$d->{exists} = 0;
 	    }
-	} elsif ($iface =~ m/^eth\d+$/) {
+	} elsif ($iface =~ m/^(\S+)\.\d+$/ || $d->{'vlan-raw-device'}) {
+	    $d->{type} = 'vlan';
+
+	    my $raw_iface = $d->{'vlan-raw-device'} ? $d->{'vlan-raw-device'} : $1;
+	    if (defined ($ifaces->{$raw_iface})) {
+		$d->{exists} = $ifaces->{$raw_iface}->{exists};
+	    } else {
+		$ifaces->{$raw_iface}->{exists} = 0;
+		$d->{exists} = 0;
+	    }
+	} elsif ($iface =~ m/^$PVE::Network::PHYSICAL_NIC_RE$/) {
 	    if (!$d->{ovs_type}) {
 		$d->{type} = 'eth';
 	    } elsif ($d->{ovs_type} eq 'OVSPort') {
 		$d->{type} = $d->{ovs_type};
 		my $tag = &$extract_ovs_option($d, 'tag');
 		$d->{ovs_tag} = $tag if defined($tag);
-	    } else {
-		$d->{type} = 'unknown';
 	    }
 	} elsif ($iface =~ m/^lo$/) {
 	    $d->{type} = 'loopback';
 	} else {
-	    if (!$d->{ovs_type}) {
-		$d->{type} = 'unknown';
-	    } elsif ($d->{ovs_type} eq 'OVSIntPort') {
-		$d->{type} = $d->{ovs_type};
-		my $tag = &$extract_ovs_option($d, 'tag');
-		$d->{ovs_tag} = $tag if defined($tag);
+	    if ($d->{'vxlan-id'}) {
+		$d->{type} = 'vxlan';
+	    } elsif (defined($d->{ovs_type})) {
+		if ($d->{ovs_type} eq 'OVSIntPort') {
+		    $d->{type} = $d->{ovs_type};
+		    my $tag = &$extract_ovs_option($d, 'tag');
+		    $d->{ovs_tag} = $tag if defined($tag);
+		}
+	    }
+	}
+
+	# map address and netmask to cidr
+	if (my $addr = $d->{address}) {
+	    if (_address_is_cidr($addr)) {
+		$d->{cidr} = $addr;
+		my ($baseaddr, $mask) = _cidr_split($addr);
+		$d->{address} = $baseaddr;
+		$d->{netmask} = $mask;
+	    } elsif (my $cidr = _get_cidr($d->{address}, $d->{netmask})) {
+		$d->{cidr} = $cidr;
+		(undef, $d->{netmask}) = _cidr_split($cidr);
+	    } else {
+		# no mask, else we'd got a cidr above
+		$d->{cidr} = $addr ."/32";
+	    }
+	}
+
+	# map address6 and netmask6 to cidr6
+	if (my $addr6 = $d->{address6}) {
+	    if (_address_is_cidr($addr6)) {
+		$d->{cidr6} = $addr6;
+		my ($baseaddr, $mask) = _cidr_split($addr6);
+		$d->{address6} = $baseaddr;
+		$d->{netmask6} = $mask;
+	    } elsif (my $cidr6 = _get_cidr($d->{address6}, $d->{netmask6})) {
+		$d->{cidr6} = $cidr6;
+	    } else {
+		# no mask, else we'd got a cidr above
+		$d->{cidr6} = $addr6 ."/128";
 	    }
 	}
 
 	$d->{method} = 'manual' if !$d->{method};
+	$d->{method6} = 'manual' if !$d->{method6};
+
+	$d->{families} ||= ['inet'];
     }
 
-    if (my $fd2 = IO::File->new("/proc/net/if_inet6", "r")) {
-	while (defined ($line = <$fd2>)) {
-	    if ($line =~ m/^[a-f0-9]{32}\s+[a-f0-9]{2}\s+[a-f0-9]{2}\s+[a-f0-9]{2}\s+[a-f0-9]{2}\s+(\S+)$/) {
-		$ifaces->{$1}->{active} = 1 if defined($ifaces->{$1});
+    # OVS bridges create "allow-$BRIDGE $IFACE" lines which we need to remove
+    # from the {options} hash for them to be removed correctly.
+    @$options = grep {defined($_)} map {
+	my ($pri, $line) = @$_;
+	if ($line =~ /^allow-ovs\s+(.*)$/) {
+	    undef;
+	} elsif ($line =~ /^allow-(\S+)\s+(.*)$/) {
+	    my $bridge = $1;
+	    my @ports = split(/\s+/, $2);
+	    if (defined(my $br = $ifaces->{$bridge})) {
+		# if this port is part of a bridge, remove it
+		my %in_ovs_ports = map {$_=>1} split(/\s+/, $br->{ovs_ports});
+		@ports = grep { not $in_ovs_ports{$_} } @ports;
+	    }
+	    # create the allow line for the remaining ports, or delete if empty
+	    if (@ports) {
+		[$pri, "allow-$bridge " . join(' ', @ports)];
+	    } else {
+		undef;
 	    }
+	} else {
+	    # don't modify other lines
+	    $_;
 	}
-	close ($fd2);
-    }
+    } @$options;
 
-    return $ifaces;
+    return $config;
+}
+
+sub _address_is_cidr {
+    my ($addr) = @_;
+    return $addr =~ /\/\d+$/ ? 1 : 0;
+}
+
+sub _cidr_split {
+    my ($cidr) = @_;
+    $cidr =~ /^(.+)\/(\d+)$/;
+    return ($1, $2); # (address, mask)
+}
+
+sub _get_cidr {
+    my ($addr, $mask) = @_;
+
+    return $addr if _address_is_cidr($addr);
+    return undef if !$mask;
+
+    if ($mask =~ m/^\d+$/) { # cidr notation
+	return $addr . "/" . $mask;
+    } elsif (my $cidrmask = PVE::JSONSchema::get_netmask_bits($mask)) {
+	return $addr . "/" . $cidrmask;
+    }
+    return undef;
 }
 
 sub __interface_to_string {
-    my ($iface, $d) = @_;
+    my ($iface, $d, $family, $first_block, $ifupdown2) = @_;
 
-    return '' if !($d && $d->{method});
+    (my $suffix = $family) =~ s/^inet//;
+
+    return '' if !($d && $d->{"method$suffix"});
 
     my $raw = '';
 
-    $raw .= "iface $iface inet $d->{method}\n";
-    $raw .= "\taddress  $d->{address}\n" if $d->{address};
-    $raw .= "\tnetmask  $d->{netmask}\n" if $d->{netmask};
-    $raw .= "\tgateway  $d->{gateway}\n" if $d->{gateway};
-    $raw .= "\tbroadcast  $d->{broadcast}\n" if $d->{broadcast};
+    $raw .= "iface $iface $family " . $d->{"method$suffix"} . "\n";
+
+    if (my $addr = $d->{"address$suffix"}) {
+
+	if ($addr !~ /\/\d+$/ && $d->{"netmask$suffix"}) {
+	    if ($d->{"netmask$suffix"} =~ m/^\d+$/) {
+		$addr .= "/" . $d->{"netmask$suffix"};
+	    } elsif (my $mask = PVE::JSONSchema::get_netmask_bits($d->{"netmask$suffix"})) {
+		$addr .= "/" . $mask;
+	    }
+	}
+
+	$raw .= "\taddress " . $addr . "\n";
+    }
+
+    $raw .= "\tgateway " . $d->{"gateway$suffix"} . "\n" if $d->{"gateway$suffix"};
 
     my $done = { type => 1, priority => 1, method => 1, active => 1, exists => 1,
 		 comments => 1, autostart => 1, options => 1,
-		 address => 1, netmask => 1, gateway => 1, broadcast => 1 };
- 
-    if ($d->{type} eq 'bridge') {
+		 address => 1, netmask => 1, gateway => 1, broadcast => 1,
+		 method6 => 1, families => 1, options6 => 1,
+		 address6 => 1, netmask6 => 1, gateway6 => 1, broadcast6 => 1, 'uplink-id' => 1 };
+
+    if (!$first_block) {
+	# not printing out options
+    } elsif ($d->{type} eq 'bridge') {
 
 	my $ports = $d->{bridge_ports} || 'none';
-	$raw .= "\tbridge_ports $ports\n";
+	$ports =~ s/[;,\s]+/ /g;
+	$raw .= "\tbridge-ports $ports\n";
 	$done->{bridge_ports} = 1;
 
 	my $v = defined($d->{bridge_stp}) ? $d->{bridge_stp} : 'off';
-	$raw .= "\tbridge_stp $v\n";
+	$raw .= "\tbridge-stp $v\n";
 	$done->{bridge_stp} = 1;
 
 	$v = defined($d->{bridge_fd}) ? $d->{bridge_fd} : 0;
-	$raw .= "\tbridge_fd $v\n";
+	$raw .= "\tbridge-fd $v\n";
 	$done->{bridge_fd} = 1;
-    
+
+	if( defined($d->{bridge_vlan_aware})) {
+	    $raw .= "\tbridge-vlan-aware yes\n";
+	    $v = defined($d->{bridge_vids}) ? $d->{bridge_vids} : "2-4094";
+	    $raw .= "\tbridge-vids $v\n";
+	}
+	$done->{bridge_vlan_aware} = 1;
+	$done->{bridge_vids} = 1;
+
+	$raw .= "\tmtu $d->{mtu}\n" if $d->{mtu};
+	$done->{mtu} = 1;
+
     } elsif ($d->{type} eq 'bond') {
 
+	$d->{slaves} =~ s/[;,\s]+/ /g;
 	my $slaves = $d->{slaves} || 'none';
-	$raw .= "\tslaves $slaves\n";
+	$raw .= "\tbond-slaves $slaves\n";
 	$done->{slaves} = 1;
 
 	my $v = defined ($d->{'bond_miimon'}) ? $d->{'bond_miimon'} : 100;
-	$raw .= "\tbond_miimon $v\n";
+	$raw .= "\tbond-miimon $v\n";
 	$done->{'bond_miimon'} = 1;
 
 	$v = defined ($d->{'bond_mode'}) ? $d->{'bond_mode'} : 'balance-rr';
-	$raw .= "\tbond_mode $v\n";
+	$raw .= "\tbond-mode $v\n";
 	$done->{'bond_mode'} = 1;
 
 	if ($d->{'bond_mode'} && $d->{'bond_xmit_hash_policy'} &&
 	    ($d->{'bond_mode'} eq 'balance-xor' || $d->{'bond_mode'} eq '802.3ad')) {
-	    $raw .= "\tbond_xmit_hash_policy $d->{'bond_xmit_hash_policy'}\n";
+	    $raw .= "\tbond-xmit-hash-policy $d->{'bond_xmit_hash_policy'}\n";
 	}
 	$done->{'bond_xmit_hash_policy'} = 1;
 
+	if ($d->{'bond_mode'} && $d->{'bond_mode'} eq 'active-backup' && $d->{'bond-primary'}) {
+	    $raw .= "\tbond-primary $d->{'bond-primary'}\n";
+	}
+	$done->{'bond-primary'} = 1;
+
+	$raw .= "\tmtu $d->{mtu}\n" if $d->{mtu};
+	$done->{mtu} = 1;
+
+    } elsif ($d->{type} eq 'vlan') {
+	die "$iface: wrong vlan-protocol $d->{'vlan-protocol'}\n"
+	    if $d->{'vlan-protocol'} && $d->{'vlan-protocol'} ne '802.1ad' && $d->{'vlan-protocol'} ne '802.1q';
+
+    } elsif ($d->{type} eq 'vxlan') {
+
+	foreach my $k (qw(vxlan-id vxlan-svcnodeip vxlan-physdev vxlan-local-tunnelip)) {
+	    $raw .= "\t$k $d->{$k}\n" if defined $d->{$k};
+	    $done->{$k} = 1;
+	}
+
+	if ($d->{'vxlan-remoteip'}) {
+	    foreach my $remoteip (@{$d->{'vxlan-remoteip'}}) {
+		$raw .= "\tvxlan-remoteip $remoteip\n";
+	    }
+	    $done->{'vxlan-remoteip'} = 1;
+	}
+
+	$raw .= "\tmtu $d->{mtu}\n" if $d->{mtu};
+	$done->{mtu} = 1;
+
     } elsif ($d->{type} eq 'OVSBridge') {
 
 	$raw .= "\tovs_type $d->{type}\n";
@@ -1003,6 +1318,9 @@ sub __interface_to_string {
 	$raw .= "\tovs_ports $d->{ovs_ports}\n" if $d->{ovs_ports};
 	$done->{ovs_ports} = 1;
 
+	$raw .= "\tovs_mtu $d->{mtu}\n" if $d->{mtu};
+	$done->{mtu} = 1;
+
     } elsif ($d->{type} eq 'OVSPort' || $d->{type} eq 'OVSIntPort' ||
 	     $d->{type} eq 'OVSBond') {
 
@@ -1036,54 +1354,70 @@ sub __interface_to_string {
 	    $done->{ovs_bonds} = 1;
 	}
 
-	if ($d->{ovs_bridge}) {
-	    $raw = "allow-$d->{ovs_bridge} $iface\n$raw";
-	}
-
 	$raw .= "\tovs_type $d->{type}\n";
 	$done->{ovs_type} = 1;
 
-	if ($d->{ovs_bridge}) {
-	    $raw .= "\tovs_bridge $d->{ovs_bridge}\n";
+	if (my $bridge = $d->{ovs_bridge}) {
+	    if ($ifupdown2) {
+		$raw = "auto $iface\n$raw";
+	    } else {
+		$raw = "allow-$bridge $iface\n$raw";
+	    }
+
+	    $raw .= "\tovs_bridge $bridge\n";
 	    $done->{ovs_bridge} = 1;
 	}
-	# fixme: use Data::Dumper; print Dumper($d);
+
+	$raw .= "\tovs_mtu $d->{mtu}\n" if $d->{mtu};
+	$done->{mtu} = 1;
     }
 
-    # print other settings
-    foreach my $k (keys %$d) {
-	next if $done->{$k};
-	next if !$d->{$k};
-	$raw .= "\t$k $d->{$k}\n";
+    if ($first_block) {
+	# print other settings
+	foreach my $k (sort keys %$d) {
+	   next if $done->{$k};
+	   next if !$d->{$k};
+	   $raw .= "\t$k $d->{$k}\n";
+	}
     }
 
-    foreach my $option (@{$d->{options}}) {
+    foreach my $option (@{$d->{"options$suffix"}}) {
 	$raw .= "\t$option\n";
     }
 
     # add comments
-    my $comments = $d->{comments} || '';
+    my $comments = $d->{"comments$suffix"} || '';
     foreach my $cl (split(/\n/, $comments)) {
 	$raw .= "#$cl\n";
     }
 
-    if ($d->{autostart}) {
-	$raw = "auto $iface\n$raw";
-    }
-
     $raw .= "\n";
 
     return $raw;
 }
 
+
 sub write_etc_network_interfaces {
-    my ($filename, $fh, $ifaces) = @_;
+    my ($filename, $fh, $config) = @_;
+    my $ifupdown2 = -e '/usr/share/ifupdown2/ifupdown2';
+    my $raw = __write_etc_network_interfaces($config, $ifupdown2);
+    PVE::Tools::safe_print($filename, $fh, encode('UTF-8', $raw));
+}
+sub __write_etc_network_interfaces {
+    my ($config, $ifupdown2) = @_;
+
+    my $ifaces = $config->{ifaces};
+    my @options = @{$config->{options}};
 
     my $used_ports = {};
 
     foreach my $iface (keys %$ifaces) {
 	my $d = $ifaces->{$iface};
 
+	my ($cidr, $cidr6) = (delete $d->{cidr}, delete $d->{cidr6});
+	$d->{address} //= $cidr;
+	$d->{address6} //= $cidr6;
+
 	my $ports = '';
 	foreach my $k (qw(bridge_ports ovs_ports slaves ovs_bonds)) {
 	    $ports .= " $d->{$k}" if $d->{$k};
@@ -1099,11 +1433,20 @@ sub write_etc_network_interfaces {
     # delete unused OVS ports
     foreach my $iface (keys %$ifaces) {
 	my $d = $ifaces->{$iface};
-	if ($d->{type} eq 'OVSPort' || $d->{type} eq 'OVSIntPort' || 
+	if ($d->{type} eq 'OVSPort' || $d->{type} eq 'OVSIntPort' ||
 	    $d->{type} eq 'OVSBond') {
 	    my $brname = $used_ports->{$iface};
-	    if (!$brname || !$ifaces->{$brname}) { 
-		delete $ifaces->{$iface}; 
+	    if (!$brname || !$ifaces->{$brname}) {
+		if ($iface =~ /^$PVE::Network::PHYSICAL_NIC_RE/) {
+		    $ifaces->{$iface} = {
+			type => 'eth',
+			exists => 1,
+			method => 'manual',
+			families => ['inet'],
+		    };
+		} else {
+		    delete $ifaces->{$iface};
+		}
 		next;
 	    }
 	    my $bd = $ifaces->{$brname};
@@ -1122,15 +1465,18 @@ sub write_etc_network_interfaces {
 		my $n = $ifaces->{$p};
 		die "OVS bridge '$iface' - unable to find port '$p'\n"
 		    if !$n;
+		$n->{autostart} = 0;
 		if ($n->{type} eq 'eth') {
 		    $n->{type} = 'OVSPort';
-		    $n->{ovs_bridge} = $iface;		    
+		    $n->{ovs_bridge} = $iface;
 		} elsif ($n->{type} eq 'OVSBond' || $n->{type} eq 'OVSPort' ||
 		    $n->{type} eq 'OVSIntPort') {
 		    $n->{ovs_bridge} = $iface;
 		} else {
 		    die "interface '$p' is not defined as OVS port/bond\n";
 		}
+
+		&$check_mtu($ifaces, $iface, $p);
 	    }
 	}
     }
@@ -1141,74 +1487,244 @@ sub write_etc_network_interfaces {
 	if ($d->{type} eq 'OVSBond' && $d->{ovs_bonds}) {
 	    foreach my $p (split (/\s+/, $d->{ovs_bonds})) {
 		my $n = $ifaces->{$p};
+		$n->{autostart} = 1;
 		die "OVS bond '$iface' - unable to find slave '$p'\n"
 		    if !$n;
 		die "OVS bond '$iface' - wrong interface type on slave '$p' " .
 		    "('$n->{type}' != 'eth')\n" if $n->{type} ne 'eth';
+		&$check_mtu($ifaces, $iface, $p);
+	    }
+	}
+    }
+
+    # check bond
+    foreach my $iface (keys %$ifaces) {
+	my $d = $ifaces->{$iface};
+	next if !($d->{type} eq 'bond' && $d->{slaves});
+
+	my $bond_primary_is_slave = undef;
+	foreach my $p (split (/\s+/, $d->{slaves})) {
+	    my $n = $ifaces->{$p};
+	    $n->{autostart} = 1;
+
+	    die "bond '$iface' - unable to find slave '$p'\n" if !$n;
+	    die "bond '$iface' - wrong interface type on slave '$p' ('$n->{type}' != 'eth or bond')\n"
+		if ($n->{type} ne 'eth' && $n->{type} ne 'bond');
+
+	    $check_mtu->($ifaces, $iface, $p);
+	    $bond_primary_is_slave = 1 if $d->{'bond-primary'} && $d->{'bond-primary'} eq $p;
+	}
+	die "bond '$iface' - bond-primary interface is not a slave" if $d->{'bond-primary'} && !$bond_primary_is_slave;
+    }
+
+    # check vxlan
+    my $vxlans = {};
+    foreach my $iface (keys %$ifaces) {
+	my $d = $ifaces->{$iface};
+
+	if ($d->{type} eq 'vxlan' && $d->{'vxlan-id'}) {
+	    my $vxlanid = $d->{'vxlan-id'};
+	    die "iface $iface - duplicate vxlan-id $vxlanid already used in $vxlans->{$vxlanid}\n" if $vxlans->{$vxlanid};
+	    $vxlans->{$vxlanid} = $iface;
+	}
+
+	my $ips = 0;
+	++$ips if defined $d->{'vxlan-svcnodeip'};
+	++$ips if defined $d->{'vxlan-remoteip'};
+	++$ips if defined $d->{'vxlan-local-tunnelip'};
+	if ($ips > 1) {
+	    die "iface $iface - vxlan-svcnodeip, vxlan-remoteip and vxlan-localtunnelip are mutually exclusive\n";
+	}
+
+	if (defined($d->{'vxlan-svcnodeip'}) != defined($d->{'vxlan-physdev'})) {
+	    die "iface $iface - vxlan-svcnodeip and vxlan-physdev must be define together\n";
+	}
+	#fixme : check if vxlan mtu is lower than 50bytes than physical interface where tunnel is going out
+    }
+
+    # check vlan
+    foreach my $iface (keys %$ifaces) {
+	my $d = $ifaces->{$iface};
+	if ($d->{type} eq 'vlan') {
+
+	    my $p = undef;
+	    my $vlanid = undef;
+
+	    if ($iface =~ m/^(\S+)\.(\d+)$/) {
+		$p = $1;
+		$vlanid = $2;
+		delete $d->{'vlan-raw-device'} if $d->{'vlan-raw-device'};
+		delete $d->{'vlan-id'} if $d->{'vlan-id'};
+
+	    } else {
+		die "missing vlan-raw-device option" if !$d->{'vlan-raw-device'};
+		$p = $d->{'vlan-raw-device'};
+
+		if ($iface =~ m/^vlan(\d+)$/) {
+		    $vlanid = $1;
+		    delete $d->{'vlan-id'} if $d->{'vlan-id'};
+		} else {
+		    die "custom vlan interface name need ifupdown2" if !$ifupdown2;
+		    die "missing vlan-id option" if !$d->{'vlan-id'};
+		    $vlanid = $d->{'vlan-id'};
+		}
+	    }
+	    my $n = $ifaces->{$p};
+
+	    die "vlan '$iface' - vlan-id $vlanid should be <= 4094\n" if $vlanid > 4094;
+	    die "vlan '$iface' - unable to find parent '$p'\n"
+		if !$n;
+
+	    if ($n->{type} ne 'eth' && $n->{type} ne 'bridge' && $n->{type} ne 'bond' && $n->{type} ne 'vlan') {
+		die "vlan '$iface' - wrong interface type on parent '$p' " .
+		    "('$n->{type}' != 'eth|bond|bridge|vlan' )\n";
+	    }
+
+	    &$check_mtu($ifaces, $p, $iface);
+
+	}
+    }
+
+    # check uplink
+    my $uplinks = {};
+    foreach my $iface (keys %$ifaces) {
+	my $d = $ifaces->{$iface};
+	if (my $uplinkid = $d->{'uplink-id'}) {
+	    die "iface '$iface' - uplink-id $uplinkid is only allowed on physical and linux bond interfaces\n"
+		if $d->{type} ne 'eth' && $d->{type} ne 'bond';
+
+	    die "iface '$iface' - uplink-id $uplinkid is already assigned on '$uplinks->{$uplinkid}'\n"
+		if $uplinks->{$uplinkid};
+
+	    $uplinks->{$uplinkid} = $iface;
+	}
+    }
+
+    # check bridgeport option
+    my $bridgeports = {};
+    my $bridges = {};
+    my $ifaces_copy = { %$ifaces };
+    foreach my $iface (keys %$ifaces_copy) {
+	my $d = $ifaces_copy->{$iface};
+	if ($d->{type} eq 'bridge') {
+	    foreach my $p (split (/\s+/, $d->{bridge_ports} // '')) {
+		if($p =~ m/(\S+)\.(\d+)$/) {
+		    my $vlanparent = $1;
+		    if (!defined($ifaces_copy->{$p})) {
+			$ifaces_copy->{$p}->{type} = 'vlan';
+			$ifaces_copy->{$p}->{method} = 'manual';
+			$ifaces_copy->{$p}->{method6} = 'manual';
+			$ifaces_copy->{$p}->{mtu} = $ifaces_copy->{$vlanparent}->{mtu} if defined($ifaces_copy->{$1}->{mtu});
+		    }
+		}
+		my $n = $ifaces_copy->{$p};
+		die "bridge '$iface' - unable to find bridge port '$p'\n" if !$n;
+		die "iface $p - ip address can't be set on interface if bridged in $iface\n"
+		    if ($n->{method} && $n->{method} eq 'static' && $n->{address} ne '0.0.0.0') ||
+		       ($n->{method6} && $n->{method6} eq 'static' && $n->{address6} ne '::');
+		&$check_mtu($ifaces_copy, $p, $iface);
+		$bridgeports->{$p} = $iface;
 	    }
+	    $bridges->{$iface} = $d;
 	}
     }
 
-    my $raw = "# network interface settings\n";
+    foreach my $iface (keys %$ifaces) {
+	my $d = $ifaces->{$iface};
+
+        foreach my $k (qw(bridge-learning bridge-arp-nd-suppress bridge-unicast-flood bridge-multicast-flood bridge-access)) {
+	    die "iface $iface - $k: bridge port specific options can be used only on interfaces attached to a bridge\n"
+		if $d->{$k} && !$bridgeports->{$iface};
+        }
+
+	if ($d->{'bridge-access'} && !$bridges->{$bridgeports->{$iface}}->{bridge_vlan_aware}) {
+	    die "iface $iface - bridge-access option can be only used if interface is in a vlan aware bridge\n";
+	}
+    }
+
+    my $raw = <<'NETWORKDOC';
+# network interface settings; autogenerated
+# Please do NOT modify this file directly, unless you know what
+# you're doing.
+#
+# If you want to manage parts of the network configuration manually,
+# please utilize the 'source' or 'source-directory' directives to do
+# so.
+# PVE will preserve these directives, but will NOT read its network
+# configuration from sourced files, so do not attempt to move any of
+# the PVE managed interfaces into external files!
+
+NETWORKDOC
 
     my $printed = {};
 
     my $if_type_hash = {
-	unknown => 0,
-	loopback => 10,
-	eth => 20,
-	bond => 30,
-	bridge => 40,
+	loopback => 100000,
+	eth => 200000,
+	OVSPort => 200000,
+	OVSIntPort => 300000,
+	OVSBond => 400000,
+	bond => 400000,
+	bridge => 500000,
+	OVSBridge => 500000,
+	vlan => 600000,
+	vxlan => 600000,
    };
 
     my $lookup_type_prio = sub {
-	my $iface = shift;
+	my ($iface, $ifaces) = @_;
 
-	my $alias = 0;
-	if ($iface =~ m/^(\S+):\d+$/) {
-	    $iface = $1;
-	    $alias = 1;
-	}
-
-	my $pri;
-	if ($iface eq 'lo') {
-	    $pri = $if_type_hash->{loopback};
-	} elsif ($iface =~ m/^eth\d+$/) {
-	    $pri = $if_type_hash->{eth} + $alias;
-	} elsif ($iface =~ m/^bond\d+$/) {
-	    $pri = $if_type_hash->{bond} + $alias;
-	} elsif ($iface =~ m/^vmbr\d+$/) {
-	    $pri = $if_type_hash->{bridge} + $alias;
-	}
+	my ($rootiface, @rest) = split(/[.:]/, $iface);
+	my $childlevel = scalar(@rest);
+	my $type = $ifaces->{$rootiface}->{type};
+	return if !$type || $type eq 'unknown';
 
-	return $pri || ($if_type_hash->{unknown} + $alias);
+	return $if_type_hash->{$type} + $childlevel
     };
 
     foreach my $iface (sort {
 	my $ref1 = $ifaces->{$a};
 	my $ref2 = $ifaces->{$b};
-	my $p1 = &$lookup_type_prio($a);
-	my $p2 = &$lookup_type_prio($b);
+	my $tp1 = &$lookup_type_prio($a, $ifaces);
+	my $tp2 = &$lookup_type_prio($b, $ifaces);
 
-	return $p1 <=> $p2 if $p1 != $p2;
+	# Only recognized types are in relation to each other. If one type
+	# is unknown then only consider the interfaces' priority attributes.
+	$tp1 = $tp2 = 0 if !defined($tp1) || !defined($tp2);
 
-	$p1 = $ref1->{priority} || 100000;
-	$p2 = $ref2->{priority} || 100000;
+	my $p1 = $tp1 + ($ref1->{priority} // 50000);
+	my $p2 = $tp2 + ($ref2->{priority} // 50000);
 
 	return $p1 <=> $p2 if $p1 != $p2;
 
 	return $a cmp $b;
-		       } keys %$ifaces) {
-
-	my $d = $ifaces->{$iface};
-
+    } keys %$ifaces) {
 	next if $printed->{$iface};
+	my $d = $ifaces->{$iface};
+	my $pri = $d->{priority} // 0;
+	if (@options && $options[0]->[0] < $pri) {
+	    do {
+		$raw .= (shift @options)->[1] . "\n";
+	    } while (@options && $options[0]->[0] < $pri);
+	    $raw .= "\n";
+	}
 
 	$printed->{$iface} = 1;
-	$raw .= __interface_to_string($iface, $d);
+	if ($d->{autostart}) {
+	    if ($d->{type} eq 'OVSBridge' && !$ifupdown2) {
+		# cannot use 'auto' for OVS, would add race with systemd ifup@.service
+		$raw .= "allow-ovs $iface\n";
+	    } else {
+		$raw .= "auto $iface\n";
+	    }
+	}
+
+	my $i = 0; # some options should be printed only once
+	$raw .= __interface_to_string($iface, $d, $_, !$i++, $ifupdown2) foreach @{$d->{families}};
     }
-    
-    PVE::Tools::safe_print($filename, $fh, $raw);
+
+    $raw .= $_->[1] . "\n" foreach @options;
+    return $raw;
 }
 
 register_file('interfaces', "/etc/network/interfaces",
@@ -1228,7 +1744,7 @@ sub read_iscsi_initiatorname {
     return 'undefined';
 }
 
-register_file('initiatorname', "/etc/iscsi/initiatorname.iscsi",  
+register_file('initiatorname', "/etc/iscsi/initiatorname.iscsi",
 	      \&read_iscsi_initiatorname);
 
 sub read_apt_auth {
@@ -1240,7 +1756,7 @@ sub read_apt_auth {
 
     $raw =~ s/^\s+//;
 
- 
+
     my @tokens = split(/\s+/, $raw);
 
     my $data = {};
@@ -1264,8 +1780,11 @@ my $format_apt_auth_data = sub {
 
     my $raw = '';
 
-    foreach my $machine (sort keys %$data) {
+    # sort longer entries first, so machine definitions with higher granularity are preferred
+    for my $machine (sort { length($b) <=> length($a) || $a cmp $b} keys %$data) {
 	my $d = $data->{$machine};
+	next if !defined($d); # allow "deleting" set entries
+
 	$raw .= "machine $machine\n";
 	$raw .= " login $d->{login}\n" if $d->{login};
 	$raw .= " password $d->{password}\n" if $d->{password};
@@ -1278,10 +1797,10 @@ my $format_apt_auth_data = sub {
 sub write_apt_auth {
     my ($filename, $fh, $data) = @_;
 
-    my $raw = &$format_apt_auth_data($data);
+    my $raw = $format_apt_auth_data->($data);
 
     die "write failed: $!" unless print $fh "$raw\n";
-   
+
     return $data;
 }
 
@@ -1294,11 +1813,16 @@ sub update_apt_auth {
 	$orig->{$machine} = $data->{$machine};
     }
 
-    return &$format_apt_auth_data($orig);
+    return $format_apt_auth_data->($orig);
 }
 
-register_file('apt-auth', "/etc/apt/auth.conf",  
-	      \&read_apt_auth, \&write_apt_auth,
-	      \&update_apt_auth, perm => 0640);
+register_file(
+    'apt-auth',
+    "/etc/apt/auth.conf",
+    \&read_apt_auth,
+    \&write_apt_auth,
+    \&update_apt_auth,
+    perm => 0640,
+);
 
 1;