src/PVE/INotify.pm

   1 package PVE::INotify;
   2
   3 # todo: maybe we do not need update_file() ?
   4
   5 use strict;
   6 use warnings;
   7
   8 use POSIX;
   9 use IO::File;
  10 use IO::Dir;
  11 use File::stat;
  12 use File::Basename;
  13 use Fcntl qw(:DEFAULT :flock);
  14 use PVE::SafeSyslog;
  15 use PVE::Exception qw(raise_param_exc);
  16 use PVE::Network;
  17 use PVE::Tools;
  18 use PVE::ProcFSTools;
  19 use Clone qw(clone);
  20 use Linux::Inotify2;
  21 use base 'Exporter';
  22 use JSON;
  23
  24 our @EXPORT_OK = qw(read_file write_file register_file);
  25
  26 my $ccache;
  27 my $ccachemap;
  28 my $ccacheregex;
  29 my $inotify;
  30 my $inotify_pid = 0;
  31 my $versions;
  32 my $shadowfiles = {
  33     '/etc/network/interfaces' => '/etc/network/interfaces.new',
  34 };
  35
  36 # to enable cached operation, you need to call 'inotify_init'
  37 # inotify handles are a limited resource, so use with care (only
  38 # enable the cache if you really need it)
  39
  40 # Note: please close the inotify handle after you fork
  41
  42 sub ccache_default_writer {
  43     my ($filename, $data) = @_;
  44
  45     die "undefined config writer for '$filename' :ERROR";
  46 }
  47
  48 sub ccache_default_parser {
  49     my ($filename, $srcfd) = @_;
  50
  51     die "undefined config reader for '$filename' :ERROR";
  52 }
  53
  54 sub ccache_compute_diff {
  55     my ($filename, $shadow) = @_;
  56
  57     my $diff = '';
  58
  59     open (TMP, "diff -b -N -u '$filename' '$shadow'|");
  60
  61     while (my $line = <TMP>) {
  62         $diff .= $line;
  63     }
  64
  65     close (TMP);
  66
  67     $diff = undef if !$diff;
  68
  69     return $diff;
  70 }
  71
  72 sub ccache_info {
  73     my ($filename) = @_;
  74
  75     foreach my $uid (keys %$ccacheregex) {
  76         my $ccinfo = $ccacheregex->{$uid};
  77         my $dir = $ccinfo->{dir};
  78         my $regex = $ccinfo->{regex};
  79         if ($filename =~ m|^$dir/+$regex$|) {
  80             if (!$ccache->{$filename}) {
  81                 my $cp = {};
  82                 while (my ($k, $v) = each %$ccinfo) {
  83                     $cp->{$k} = $v;
  84                 }
  85                 $ccache->{$filename} = $cp;
  86             }
  87             return ($ccache->{$filename}, $filename);
  88         }
  89     }
  90
  91     $filename = $ccachemap->{$filename} if defined ($ccachemap->{$filename});
  92
  93     die "file '$filename' not added :ERROR" if !defined ($ccache->{$filename});
  94
  95     return ($ccache->{$filename}, $filename);
  96 }
  97
  98 sub write_file {
  99     my ($fileid, $data, $full) = @_;
 100
 101     my ($ccinfo, $filename) = ccache_info($fileid);
 102
 103     my $writer = $ccinfo->{writer};
 104
 105     my $realname = $filename;
 106
 107     my $shadow;
 108     if ($shadow = $shadowfiles->{$filename}) {
 109         $realname = $shadow;
 110     }
 111
 112     my $perm = $ccinfo->{perm} || 0644;
 113
 114     my $tmpname = "$realname.tmp.$$";
 115
 116     my $res;
 117     eval {
 118         my $fh = IO::File->new($tmpname, O_WRONLY|O_CREAT, $perm);
 119         die "unable to open file '$tmpname' - $!\n" if !$fh;
 120
 121         $res = &$writer($filename, $fh, $data);
 122
 123         die "closing file '$tmpname' failed - $!\n" unless close $fh;
 124     };
 125     my $err = $@;
 126
 127     $ccinfo->{version} = undef;
 128
 129     if ($err) {
 130         unlink $tmpname;
 131         die $err;
 132     }
 133
 134     if (!rename($tmpname, $realname)) {
 135         my $msg = "close (rename) atomic file '$filename' failed: $!\n";
 136         unlink $tmpname;
 137         die $msg;
 138     }
 139
 140     my $diff;
 141     if ($shadow && $full) {
 142         $diff = ccache_compute_diff ($filename, $shadow);
 143     }
 144
 145     if ($full) {
 146         return { data => $res, changes => $diff };
 147     }
 148
 149     return $res;
 150 }
 151
 152 sub update_file {
 153     my ($fileid, $data, @args) = @_;
 154
 155     my ($ccinfo, $filename) = ccache_info($fileid);
 156
 157     my $update = $ccinfo->{update};
 158
 159     die "unable to update/merge data" if !$update;
 160
 161     my $lkfn = "$filename.lock";
 162
 163     my $timeout = 10;
 164
 165     my $fd;
 166
 167     my $code = sub {
 168
 169         $fd = IO::File->new ($filename, "r");
 170
 171         my $new = &$update($filename, $fd, $data, @args);
 172
 173         if (defined($new)) {
 174             PVE::Tools::file_set_contents($filename, $new, $ccinfo->{perm});
 175         } else {
 176             unlink $filename;
 177         }
 178     };
 179
 180     PVE::Tools::lock_file($lkfn, $timeout, $code);
 181     my $err = $@;
 182
 183     close($fd) if defined($fd);
 184
 185     die $err if $err;
 186
 187     return undef;
 188 }
 189
 190 sub discard_changes {
 191     my ($fileid, $full) = @_;
 192
 193     my ($ccinfo, $filename) = ccache_info($fileid);
 194
 195     if (my $copy = $shadowfiles->{$filename}) {
 196         unlink $copy;
 197     }
 198
 199     return read_file ($filename, $full);
 200 }
 201
 202 sub poll_changes {
 203     my ($filename) = @_;
 204
 205     poll() if $inotify; # read new inotify events
 206
 207     $versions->{$filename} = 0 if !defined ($versions->{$filename});
 208
 209     return $versions->{$filename};
 210 }
 211
 212 sub read_file {
 213     my ($fileid, $full) = @_;
 214
 215     my $parser;
 216
 217     my ($ccinfo, $filename) = ccache_info($fileid);
 218
 219     $parser = $ccinfo->{parser};
 220
 221     my $fd;
 222     my $shadow;
 223
 224     my $cver = poll_changes($filename);
 225
 226     if (my $copy = $shadowfiles->{$filename}) {
 227         if ($fd = IO::File->new ($copy, "r")) {
 228             $shadow = $copy;
 229         } else {
 230             $fd = IO::File->new ($filename, "r");
 231         }
 232     } else {
 233         $fd = IO::File->new ($filename, "r");
 234     }
 235
 236     my $acp = $ccinfo->{always_call_parser};
 237
 238     if (!$fd) {
 239         $ccinfo->{version} = undef;
 240         $ccinfo->{data} = undef;
 241         $ccinfo->{diff} = undef;
 242         return undef if !$acp;
 243     }
 244
 245     my $noclone = $ccinfo->{noclone};
 246
 247     # file unchanged?
 248     if (!$ccinfo->{nocache} &&
 249         $inotify && $cver &&
 250         defined ($ccinfo->{data}) &&
 251         defined ($ccinfo->{version}) &&
 252         ($ccinfo->{readonce} ||
 253          ($ccinfo->{version} == $cver))) {
 254
 255         my $ret;
 256         if (!$noclone && ref ($ccinfo->{data})) {
 257             $ret->{data} = clone ($ccinfo->{data});
 258         } else {
 259             $ret->{data} = $ccinfo->{data};
 260         }
 261         $ret->{changes} = $ccinfo->{diff};
 262
 263         return $full ? $ret : $ret->{data};
 264     }
 265
 266     my $diff;
 267
 268     if ($shadow) {
 269         $diff = ccache_compute_diff ($filename, $shadow);
 270     }
 271
 272     my $res = &$parser($filename, $fd);
 273
 274     if (!$ccinfo->{nocache}) {
 275         $ccinfo->{version} = $cver;
 276     }
 277
 278     # we cache data with references, so we always need to
 279     # clone this data. Else the original data may get
 280     # modified.
 281     $ccinfo->{data} = $res;
 282
 283     # also store diff
 284     $ccinfo->{diff} = $diff;
 285
 286     my $ret;
 287     if (!$noclone && ref ($ccinfo->{data})) {
 288         $ret->{data} = clone ($ccinfo->{data});
 289     } else {
 290         $ret->{data} = $ccinfo->{data};
 291     }
 292     $ret->{changes} = $ccinfo->{diff};
 293
 294     return $full ? $ret : $ret->{data};
 295 }
 296
 297 sub parse_ccache_options {
 298     my ($ccinfo, %options) = @_;
 299
 300     foreach my $opt (keys %options) {
 301         my $v = $options{$opt};
 302         if ($opt eq 'readonce') {
 303             $ccinfo->{$opt} = $v;
 304         } elsif ($opt eq 'nocache') {
 305             $ccinfo->{$opt} = $v;
 306         } elsif ($opt eq 'shadow') {
 307             $ccinfo->{$opt} = $v;
 308         } elsif ($opt eq 'perm') {
 309             $ccinfo->{$opt} = $v;
 310         } elsif ($opt eq 'noclone') {
 311             # noclone flag for large read-only data chunks like aplinfo
 312             $ccinfo->{$opt} = $v;
 313         } elsif ($opt eq 'always_call_parser') {
 314             # when set, we call parser even when the file does not exists.
 315             # this allows the parser to return some default
 316             $ccinfo->{$opt} = $v;
 317         } else {
 318             die "internal error - unsupported option '$opt'";
 319         }
 320     }
 321 }
 322
 323 sub register_file {
 324     my ($id, $filename, $parser, $writer, $update, %options) = @_;
 325
 326     die "can't register file '$filename' after inotify_init" if $inotify;
 327
 328     die "file '$filename' already added :ERROR" if defined ($ccache->{$filename});
 329     die "ID '$id' already used :ERROR" if defined ($ccachemap->{$id});
 330
 331     my $ccinfo = {};
 332
 333     $ccinfo->{id} = $id;
 334     $ccinfo->{parser} = $parser || \&ccache_default_parser;
 335     $ccinfo->{writer} = $writer || \&ccache_default_writer;
 336     $ccinfo->{update} = $update;
 337
 338     parse_ccache_options($ccinfo, %options);
 339
 340     if ($options{shadow}) {
 341         $shadowfiles->{$filename} = $options{shadow};
 342     }
 343
 344     $ccachemap->{$id} = $filename;
 345     $ccache->{$filename} = $ccinfo;
 346 }
 347
 348 sub register_regex {
 349     my ($dir, $regex, $parser, $writer, $update, %options) = @_;
 350
 351     die "can't register regex after inotify_init" if $inotify;
 352
 353     my $uid = "$dir/$regex";
 354     die "regular expression '$uid' already added :ERROR" if defined ($ccacheregex->{$uid});
 355
 356     my $ccinfo = {};
 357
 358     $ccinfo->{dir} = $dir;
 359     $ccinfo->{regex} = $regex;
 360     $ccinfo->{parser} = $parser || \&ccache_default_parser;
 361     $ccinfo->{writer} = $writer || \&ccache_default_writer;
 362     $ccinfo->{update} = $update;
 363
 364     parse_ccache_options($ccinfo, %options);
 365
 366     $ccacheregex->{$uid} = $ccinfo;
 367 }
 368
 369 sub poll {
 370     return if !$inotify;
 371
 372     if ($inotify_pid != $$) {
 373         syslog ('err', "got inotify poll request in wrong process - disabling inotify");
 374         $inotify = undef;
 375     } else {
 376         1 while $inotify && $inotify->poll;
 377     }
 378 }
 379
 380 sub flushcache {
 381     foreach my $filename (keys %$ccache) {
 382         $ccache->{$filename}->{version} = undef;
 383         $ccache->{$filename}->{data} = undef;
 384         $ccache->{$filename}->{diff} = undef;
 385     }
 386 }
 387
 388 sub inotify_close {
 389     $inotify = undef;
 390 }
 391
 392 sub inotify_init {
 393
 394     die "only one inotify instance allowed" if $inotify;
 395
 396     $inotify =  Linux::Inotify2->new()
 397         || die "Unable to create new inotify object: $!";
 398
 399     $inotify->blocking (0);
 400
 401     $versions = {};
 402
 403     my $dirhash = {};
 404     foreach my $fn (keys %$ccache) {
 405         my $dir = dirname ($fn);
 406         my $base = basename ($fn);
 407
 408         $dirhash->{$dir}->{$base} = $fn;
 409
 410         if (my $sf = $shadowfiles->{$fn}) {
 411             $base = basename ($sf);
 412             $dir = dirname ($sf);
 413             $dirhash->{$dir}->{$base} = $fn; # change version of original file!
 414         }
 415     }
 416
 417     foreach my $uid (keys %$ccacheregex) {
 418         my $ccinfo = $ccacheregex->{$uid};
 419         $dirhash->{$ccinfo->{dir}}->{_regex} = 1;
 420     }
 421
 422     $inotify_pid = $$;
 423
 424     foreach my $dir (keys %$dirhash) {
 425
 426         my $evlist = IN_MODIFY|IN_ATTRIB|IN_MOVED_FROM|IN_MOVED_TO|IN_DELETE|IN_CREATE;
 427         $inotify->watch ($dir, $evlist, sub {
 428             my $e = shift;
 429             my $name = $e->name;
 430
 431             if ($inotify_pid != $$) {
 432                 syslog ('err', "got inotify event in wrong process");
 433             }
 434
 435             if ($e->IN_ISDIR || !$name) {
 436                 return;
 437             }
 438
 439             if ($e->IN_Q_OVERFLOW) {
 440                 syslog ('info', "got inotify overflow - flushing cache");
 441                 flushcache();
 442                 return;
 443             }
 444
 445             if ($e->IN_UNMOUNT) {
 446                 syslog ('err', "got 'unmount' event on '$name' - disabling inotify");
 447                 $inotify = undef;
 448             }
 449             if ($e->IN_IGNORED) {
 450                 syslog ('err', "got 'ignored' event on '$name' - disabling inotify");
 451                 $inotify = undef;
 452             }
 453
 454             if ($dirhash->{$dir}->{_regex}) {
 455                 foreach my $uid (keys %$ccacheregex) {
 456                     my $ccinfo = $ccacheregex->{$uid};
 457                     next if $dir ne $ccinfo->{dir};
 458                     my $regex = $ccinfo->{regex};
 459                     if ($regex && ($name =~ m|^$regex$|)) {
 460
 461                         my $fn = "$dir/$name";
 462                         $versions->{$fn}++;
 463                         #print "VERSION:$fn:$versions->{$fn}\n";
 464                     }
 465                 }
 466             } elsif (my $fn = $dirhash->{$dir}->{$name}) {
 467
 468                 $versions->{$fn}++;
 469                 #print "VERSION:$fn:$versions->{$fn}\n";
 470             }
 471         });
 472     }
 473
 474     foreach my $dir (keys %$dirhash) {
 475         foreach my $name (keys %{$dirhash->{$dir}}) {
 476             if ($name eq '_regex') {
 477                 foreach my $uid (keys %$ccacheregex) {
 478                     my $ccinfo = $ccacheregex->{$uid};
 479                     next if $dir ne $ccinfo->{dir};
 480                     my $re = $ccinfo->{regex};
 481                     if (my $fd = IO::Dir->new ($dir)) {
 482                         while (defined(my $de = $fd->read)) {
 483                             if ($de =~ m/^$re$/) {
 484                                 my $fn = "$dir/$de";
 485                                 $versions->{$fn}++; # init with version
 486                                 #print "init:$fn:$versions->{$fn}\n";
 487                             }
 488                         }
 489                     }
 490                 }
 491             } else {
 492                 my $fn = $dirhash->{$dir}->{$name};
 493                 $versions->{$fn}++; # init with version
 494                 #print "init:$fn:$versions->{$fn}\n";
 495             }
 496         }
 497     }
 498 }
 499
 500 my $cached_nodename;
 501
 502 sub nodename {
 503
 504     return $cached_nodename if $cached_nodename;
 505
 506     my ($sysname, $nodename) = POSIX::uname();
 507
 508     $nodename =~ s/\..*$//; # strip domain part, if any
 509
 510     die "unable to read node name\n" if !$nodename;
 511
 512     $cached_nodename = $nodename;
 513
 514     return $cached_nodename;
 515 }
 516
 517 sub read_etc_hostname {
 518     my ($filename, $fd) = @_;
 519
 520     my $hostname = <$fd>;
 521
 522     chomp $hostname;
 523
 524     $hostname =~ s/\..*$//; # strip domain part, if any
 525
 526     return $hostname;
 527 }
 528
 529 sub write_etc_hostname {
 530     my ($filename, $fh, $hostname) = @_;
 531
 532     die "write failed: $!" unless print $fh "$hostname\n";
 533
 534     return $hostname;
 535 }
 536
 537 register_file('hostname', "/etc/hostname",
 538               \&read_etc_hostname,
 539               \&write_etc_hostname);
 540
 541 sub read_etc_resolv_conf {
 542     my ($filename, $fh) = @_;
 543
 544     my $res = {};
 545
 546     my $nscount = 0;
 547     while (my $line = <$fh>) {
 548         chomp $line;
 549         if ($line =~ m/^(search|domain)\s+(\S+)\s*/) {
 550             $res->{search} = $2;
 551         } elsif ($line =~ m/^\s*nameserver\s+($PVE::Tools::IPRE)\s*/) {
 552             $nscount++;
 553             if ($nscount <= 3) {
 554                 $res->{"dns$nscount"} = $1;
 555             }
 556         }
 557     }
 558
 559     return $res;
 560 }
 561
 562 sub update_etc_resolv_conf {
 563     my ($filename, $fh, $resolv, @args) = @_;
 564
 565     my $data = "";
 566
 567     $data = "search $resolv->{search}\n"
 568         if $resolv->{search};
 569
 570     my $written = {};
 571     foreach my $k ("dns1", "dns2", "dns3") {
 572         my $ns = $resolv->{$k};
 573         if ($ns && $ns ne '0.0.0.0' && !$written->{$ns}) {
 574             $written->{$ns} = 1;
 575             $data .= "nameserver $ns\n";
 576         }
 577     }
 578
 579     while (my $line = <$fh>) {
 580         next if $line =~ m/^(search|domain|nameserver)\s+/;
 581         $data .= $line
 582     }
 583
 584     return $data;
 585 }
 586
 587 register_file('resolvconf', "/etc/resolv.conf",
 588               \&read_etc_resolv_conf, undef,
 589               \&update_etc_resolv_conf);
 590
 591 sub read_etc_timezone {
 592     my ($filename, $fd) = @_;
 593
 594     my $timezone = <$fd>;
 595
 596     chomp $timezone;
 597
 598     return $timezone;
 599 }
 600
 601 sub write_etc_timezone {
 602     my ($filename, $fh, $timezone) = @_;
 603
 604     my $tzinfo = "/usr/share/zoneinfo/$timezone";
 605
 606     raise_param_exc({ 'timezone' => "No such timezone" })
 607         if (! -f $tzinfo);
 608
 609     ($timezone) = $timezone =~ m/^(.*)$/; # untaint
 610
 611     print $fh "$timezone\n";
 612
 613     unlink ("/etc/localtime");
 614     symlink ("/usr/share/zoneinfo/$timezone", "/etc/localtime");
 615
 616 }
 617
 618 register_file('timezone', "/etc/timezone",
 619               \&read_etc_timezone,
 620               \&write_etc_timezone);
 621
 622 sub read_active_workers {
 623     my ($filename, $fh) = @_;
 624
 625     return [] if !$fh;
 626
 627     my $res = [];
 628     while (defined (my $line = <$fh>)) {
 629         if ($line =~ m/^(\S+)\s(0|1)(\s([0-9A-Za-z]{8})(\s(\s*\S.*))?)?$/) {
 630             my $upid = $1;
 631             my $saved = $2;
 632             my $endtime = $4;
 633             my $status = $6;
 634             if ((my $task = PVE::Tools::upid_decode($upid, 1))) {
 635                 $task->{upid} = $upid;
 636                 $task->{saved} = $saved;
 637                 $task->{endtime} = hex($endtime) if $endtime;
 638                 $task->{status} = $status if $status;
 639                 push @$res, $task;
 640             }
 641         } else {
 642             warn "unable to parse line: $line";
 643         }
 644     }
 645
 646     return $res;
 647
 648 }
 649
 650 sub write_active_workers {
 651     my ($filename, $fh, $tasklist) = @_;
 652
 653     my $raw = '';
 654     foreach my $task (@$tasklist) {
 655         my $upid = $task->{upid};
 656         my $saved = $task->{saved} ? 1 : 0;
 657         if ($task->{endtime}) {
 658             if ($task->{status}) {
 659                 $raw .= sprintf("%s %s %08X %s\n", $upid, $saved, $task->{endtime}, $task->{status});
 660             } else {
 661                 $raw .= sprintf("%s %s %08X\n", $upid, $saved, $task->{endtime});
 662             }
 663         } else {
 664             $raw .= "$upid $saved\n";
 665         }
 666     }
 667
 668     PVE::Tools::safe_print($filename, $fh, $raw) if $raw;
 669 }
 670
 671 register_file('active', "/var/log/pve/tasks/active",
 672               \&read_active_workers,
 673               \&write_active_workers);
 674
 675
 676 our $bond_modes = { 'balance-rr' => 0,
 677                    'active-backup' => 1,
 678                    'balance-xor' => 2,
 679                    'broadcast' => 3,
 680                    '802.3ad' => 4,
 681                    'balance-tlb' => 5,
 682                    'balance-alb' => 6,
 683                };
 684
 685 my $ovs_bond_modes = {
 686     'active-backup' => 1,
 687     'balance-slb' => 1,
 688     'lacp-balance-slb' => 1,
 689     'lacp-balance-tcp' => 1,
 690 };
 691
 692 #sub get_bond_modes {
 693 #    return $bond_modes;
 694 #}
 695
 696 my $parse_ovs_option = sub {
 697     my ($data) = @_;
 698
 699     my $opts = {};
 700     foreach my $kv (split (/\s+/, $data || '')) {
 701         my ($k, $v) = split('=', $kv, 2);
 702         $opts->{$k} = $v if $k && $v;
 703     }
 704     return $opts;
 705 };
 706
 707 my $set_ovs_option = sub {
 708     my ($d, %params) = @_;
 709
 710     my $opts = &$parse_ovs_option($d->{ovs_options});
 711
 712     foreach my $k (keys %params) {
 713         my $v = $params{$k};
 714         if ($v) {
 715             $opts->{$k} = $v;
 716         } else {
 717             delete $opts->{$k};
 718         }
 719     }
 720
 721     my $res = [];
 722     foreach my $k (keys %$opts) {
 723         push @$res, "$k=$opts->{$k}";
 724     }
 725
 726     if (my $new = join(' ', @$res)) {
 727         $d->{ovs_options} = $new;
 728         return $d->{ovs_options};
 729     } else {
 730         delete $d->{ovs_options};
 731         return undef;
 732     }
 733 };
 734
 735 my $extract_ovs_option = sub {
 736     my ($d, $name) = @_;
 737
 738     my $opts = &$parse_ovs_option($d->{ovs_options});
 739
 740     my $v = delete $opts->{$name};
 741
 742     my $res = [];
 743     foreach my $k (keys %$opts) {
 744         push @$res, "$k=$opts->{$k}";
 745     }
 746
 747     if (my $new = join(' ', @$res)) {
 748         $d->{ovs_options} = $new;
 749     } else {
 750         delete $d->{ovs_options};
 751     }
 752
 753     return $v;
 754 };
 755
 756 # config => {
 757 #   ifaces => {
 758 #     $ifname => {
 759 #       <optional> exists => BOOL,
 760 #       <optional> active => BOOL,
 761 #       <optional> autostart => BOOL,
 762 #       <auto> priority => INT,
 763 #
 764 #       type => "eth" | "bridge" | "bond" | "loopback" | "OVS*" | ... ,
 765 #
 766 #       families => ["inet", "inet6", ...],
 767 #
 768 #       method => "manual" | "static" | "dhcp" | ... ,
 769 #       address => IP,
 770 #       netmask => SUBNET,
 771 #       broadcast => IP,
 772 #       gateway => IP,
 773 #       comments => [ "..." ],
 774 #
 775 #       method6 => "manual" | "static" | "dhcp" | ... ,
 776 #       address6 => IP,
 777 #       netmask6 => SUBNET,
 778 #       gateway6 => IP,
 779 #       comments6 => [ "..." ],
 780 #
 781 #       <known options>, # like bridge_ports, ovs_*
 782 #
 783 #       # extra/unknown options stored by-family:
 784 #       options => { <inet options>... }
 785 #       options6 => { <inet6 options>... }
 786 #     }
 787 #   },
 788 #   options => [
 789 #     # mappings end up here as well, as we don't need to understand them
 790 #     [priority,line]
 791 #   ]
 792 # }
 793 sub read_etc_network_interfaces {
 794     my ($filename, $fh) = @_;
 795     my $proc_net_dev = IO::File->new('/proc/net/dev', 'r');
 796     my $active = PVE::ProcFSTools::get_active_network_interfaces();
 797     return __read_etc_network_interfaces($fh, $proc_net_dev, $active);
 798 }
 799
 800 sub __read_etc_network_interfaces {
 801     my ($fh, $proc_net_dev, $active_ifaces) = @_;
 802
 803     my $config = {};
 804     my $ifaces = $config->{ifaces} = {};
 805     my $options = $config->{options} = [];
 806
 807     my $options_alternatives = {
 808         'bond-slaves' => 'slaves',
 809         'bond_slaves' => 'slaves',
 810         'bond-xmit-hash-policy' => 'bond_xmit_hash_policy',
 811         'bond-mode' => 'bond_mode',
 812         'bond-miimon' =>'bond_miimon',
 813         'bridge-vlan-aware' => 'bridge_vlan_aware',
 814         'bridge-fd' => 'bridge_fd',
 815         'bridge-stp' => 'bridge_stp',
 816         'bridge-ports' => 'bridge_ports',
 817         'bridge-vids' => 'bridge_vids'
 818     };
 819
 820     my $line;
 821
 822     if ($proc_net_dev) {
 823         while (defined ($line = <$proc_net_dev>)) {
 824             if ($line =~ m/^\s*($PVE::Network::PHYSICAL_NIC_RE):.*/) {
 825                 $ifaces->{$1}->{exists} = 1;
 826             }
 827         }
 828         close($proc_net_dev);
 829     }
 830
 831     # we try to keep order inside the file
 832     my $priority = 2; # 1 is reserved for lo
 833
 834     SECTION: while (defined ($line = <$fh>)) {
 835         chomp ($line);
 836         next if $line =~ m/^\s*#/;
 837
 838         if ($line =~ m/^\s*auto\s+(.*)$/) {
 839             my @aa = split (/\s+/, $1);
 840
 841             foreach my $a (@aa) {
 842                 $ifaces->{$a}->{autostart} = 1;
 843             }
 844
 845         } elsif ($line =~ m/^\s*iface\s+(\S+)\s+(inet6?)\s+(\S+)\s*$/) {
 846             my $i = $1;
 847             my $family = $2;
 848             my $f = { method => $3 }; # by family, merged to $d with a $suffix
 849             (my $suffix = $family) =~ s/^inet//;
 850
 851             my $d = $ifaces->{$i} ||= {};
 852             $d->{priority} = $priority++ if !$d->{priority};
 853             push @{$d->{families}}, $family;
 854
 855             while (defined ($line = <$fh>)) {
 856                 chomp $line;
 857                 if ($line =~ m/^\s*#(.*?)\s*$/) {
 858                     # NOTE: we use 'comments' instead of 'comment' to
 859                     # avoid automatic utf8 conversion
 860                     $f->{comments} = '' if !$f->{comments};
 861                     $f->{comments} .= "$1\n";
 862                 } elsif ($line =~ m/^\s*(?:iface\s
 863                                           |mapping\s
 864                                           |auto\s
 865                                           |allow-
 866                                           |source\s
 867                                           |source-directory\s
 868                                         )/x) {
 869                     last;
 870                 } elsif ($line =~ m/^\s*((\S+)\s+(.+))$/) {
 871                     my $option = $1;
 872                     my ($id, $value) = ($2, $3);
 873
 874                     $id = $options_alternatives->{$id} if $options_alternatives->{$id};
 875
 876                     if (($id eq 'address') || ($id eq 'netmask') || ($id eq 'broadcast') || ($id eq 'gateway')) {
 877                         $f->{$id} = $value;
 878                     } elsif ($id eq 'ovs_type' || $id eq 'ovs_options'|| $id eq 'ovs_bridge' ||
 879                              $id eq 'ovs_bonds' || $id eq 'ovs_ports') {
 880                         $d->{$id} = $value;
 881                     } elsif ($id eq 'slaves' || $id eq 'bridge_ports') {
 882                         my $devs = {};
 883                         foreach my $p (split (/\s+/, $value)) {
 884                             next if $p eq 'none';
 885                             $devs->{$p} = 1;
 886                         }
 887                         my $str = join (' ', sort keys %{$devs});
 888                         if ($d->{$id}) {
 889                             $d->{$id} .= ' ' . $str if $str;
 890                         } else {
 891                             $d->{$id} = $str || '';
 892                         }
 893                     } elsif ($id eq 'bridge_stp') {
 894                         if ($value =~ m/^\s*(on|yes)\s*$/i) {
 895                             $d->{$id} = 'on';
 896                         } else {
 897                             $d->{$id} = 'off';
 898                         }
 899                     } elsif ($id eq 'bridge_fd') {
 900                         $d->{$id} = $value;
 901                     } elsif ($id eq 'bridge_vlan_aware') {
 902                         $d->{$id} = 1;
 903                     } elsif ($id eq 'bond_miimon') {
 904                         $d->{$id} = $value;
 905                     } elsif ($id eq 'bond_xmit_hash_policy') {
 906                         $d->{$id} = $value;
 907                     } elsif ($id eq 'bond_mode') {
 908                         # always use names
 909                         foreach my $bm (keys %$bond_modes) {
 910                             my $id = $bond_modes->{$bm};
 911                             if ($id eq $value) {
 912                                 $value = $bm;
 913                                 last;
 914                             }
 915                         }
 916                         $d->{$id} = $value;
 917                     } else {
 918                         push @{$f->{options}}, $option;
 919                     }
 920                 } else {
 921                     last;
 922                 }
 923             }
 924             $d->{"$_$suffix"} = $f->{$_} foreach (keys %$f);
 925             last SECTION if !defined($line);
 926             redo SECTION;
 927         } elsif ($line =~ /\w/) {
 928             push @$options, [$priority++, $line];
 929         }
 930     }
 931
 932     foreach my $ifname (@$active_ifaces) {
 933         if (my $iface = $ifaces->{$ifname}) {
 934             $iface->{active} = 1;
 935         }
 936     }
 937
 938     if (!$ifaces->{lo}) {
 939         $ifaces->{lo}->{priority} = 1;
 940         $ifaces->{lo}->{method} = 'loopback';
 941         $ifaces->{lo}->{type} = 'loopback';
 942         $ifaces->{lo}->{autostart} = 1;
 943     }
 944
 945     foreach my $iface (keys %$ifaces) {
 946         my $d = $ifaces->{$iface};
 947         if ($iface =~ m/^bond\d+$/) {
 948             if (!$d->{ovs_type}) {
 949                 $d->{type} = 'bond';
 950             } elsif ($d->{ovs_type} eq 'OVSBond') {
 951                 $d->{type} = $d->{ovs_type};
 952                 # translate: ovs_options => bond_mode
 953                 $d->{'bond_mode'} = &$extract_ovs_option($d, 'bond_mode');
 954                 my $lacp = &$extract_ovs_option($d, 'lacp');
 955                 if ($lacp && $lacp eq 'active') {
 956                     if ($d->{'bond_mode'} eq 'balance-slb') {
 957                         $d->{'bond_mode'} = 'lacp-balance-slb';
 958                     }
 959                 }
 960                 # Note: balance-tcp needs lacp
 961                 if ($d->{'bond_mode'} eq 'balance-tcp') {
 962                     $d->{'bond_mode'} = 'lacp-balance-tcp';
 963                 }
 964                 my $tag = &$extract_ovs_option($d, 'tag');
 965                 $d->{ovs_tag} = $tag if defined($tag);
 966             } else {
 967                 $d->{type} = 'unknown';
 968             }
 969         } elsif ($iface =~ m/^vmbr\d+$/) {
 970             if (!$d->{ovs_type}) {
 971                 $d->{type} = 'bridge';
 972
 973                 if (!defined ($d->{bridge_fd})) {
 974                     $d->{bridge_fd} = 0;
 975                 }
 976                 if (!defined ($d->{bridge_stp})) {
 977                     $d->{bridge_stp} = 'off';
 978                 }
 979             } elsif ($d->{ovs_type} eq 'OVSBridge') {
 980                 $d->{type} = $d->{ovs_type};
 981             } else {
 982                 $d->{type} = 'unknown';
 983             }
 984         } elsif ($iface =~ m/^(\S+):\d+$/) {
 985             $d->{type} = 'alias';
 986             if (defined ($ifaces->{$1})) {
 987                 $d->{exists} = $ifaces->{$1}->{exists};
 988             } else {
 989                 $ifaces->{$1}->{exists} = 0;
 990                 $d->{exists} = 0;
 991             }
 992         } elsif ($iface =~ m/^(\S+)\.\d+$/) {
 993             $d->{type} = 'vlan';
 994             if (defined ($ifaces->{$1})) {
 995                 $d->{exists} = $ifaces->{$1}->{exists};
 996             } else {
 997                 $ifaces->{$1}->{exists} = 0;
 998                 $d->{exists} = 0;
 999             }
1000         } elsif ($iface =~ m/^$PVE::Network::PHYSICAL_NIC_RE$/) {
1001             if (!$d->{ovs_type}) {
1002                 $d->{type} = 'eth';
1003             } elsif ($d->{ovs_type} eq 'OVSPort') {
1004                 $d->{type} = $d->{ovs_type};
1005                 my $tag = &$extract_ovs_option($d, 'tag');
1006                 $d->{ovs_tag} = $tag if defined($tag);
1007             } else {
1008                 $d->{type} = 'unknown';
1009             }
1010         } elsif ($iface =~ m/^lo$/) {
1011             $d->{type} = 'loopback';
1012         } else {
1013             if (!$d->{ovs_type}) {
1014                 $d->{type} = 'unknown';
1015             } elsif ($d->{ovs_type} eq 'OVSIntPort') {
1016                 $d->{type} = $d->{ovs_type};
1017                 my $tag = &$extract_ovs_option($d, 'tag');
1018                 $d->{ovs_tag} = $tag if defined($tag);
1019             }
1020         }
1021
1022         $d->{method} = 'manual' if !$d->{method};
1023         $d->{method6} = 'manual' if !$d->{method6};
1024
1025         $d->{families} ||= ['inet'];
1026     }
1027
1028     # OVS bridges create "allow-$BRIDGE $IFACE" lines which we need to remove
1029     # from the {options} hash for them to be removed correctly.
1030     @$options = grep {defined($_)} map {
1031         my ($pri, $line) = @$_;
1032         if ($line =~ /^allow-(\S+)\s+(.*)$/) {
1033             my $bridge = $1;
1034             my @ports = split(/\s+/, $2);
1035             if (defined(my $br = $ifaces->{$bridge})) {
1036                 # if this port is part of a bridge, remove it
1037                 my %in_ovs_ports = map {$_=>1} split(/\s+/, $br->{ovs_ports});
1038                 @ports = grep { not $in_ovs_ports{$_} } @ports;
1039             }
1040             # create the allow line for the remaining ports, or delete if empty
1041             if (@ports) {
1042                 [$pri, "allow-$bridge " . join(' ', @ports)];
1043             } else {
1044                 undef;
1045             }
1046         } else {
1047             # don't modify other lines
1048             $_;
1049         }
1050     } @$options;
1051
1052     return $config;
1053 }
1054
1055 sub __interface_to_string {
1056     my ($iface, $d, $family, $first_block, $ifupdown2) = @_;
1057
1058     (my $suffix = $family) =~ s/^inet//;
1059
1060     return '' if !($d && $d->{"method$suffix"});
1061
1062     my $raw = '';
1063
1064     $raw .= "iface $iface $family " . $d->{"method$suffix"} . "\n";
1065     $raw .= "\taddress  " . $d->{"address$suffix"} . "\n" if $d->{"address$suffix"};
1066     $raw .= "\tnetmask  " . $d->{"netmask$suffix"} . "\n" if $d->{"netmask$suffix"};
1067     $raw .= "\tgateway  " . $d->{"gateway$suffix"} . "\n" if $d->{"gateway$suffix"};
1068     $raw .= "\tbroadcast  " . $d->{"broadcast$suffix"} . "\n" if $d->{"broadcast$suffix"};
1069
1070     my $done = { type => 1, priority => 1, method => 1, active => 1, exists => 1,
1071                  comments => 1, autostart => 1, options => 1,
1072                  address => 1, netmask => 1, gateway => 1, broadcast => 1,
1073                  method6 => 1, families => 1, options6 => 1,
1074                  address6 => 1, netmask6 => 1, gateway6 => 1, broadcast6 => 1 };
1075
1076     if (!$first_block) {
1077         # not printing out options
1078     } elsif ($d->{type} eq 'bridge') {
1079
1080         $d->{bridge_ports} =~ s/[;,\s]+/ /g;
1081         my $ports = $d->{bridge_ports} || 'none';
1082         $raw .= "\tbridge-ports $ports\n";
1083         $done->{bridge_ports} = 1;
1084
1085         my $v = defined($d->{bridge_stp}) ? $d->{bridge_stp} : 'off';
1086         $raw .= "\tbridge-stp $v\n";
1087         $done->{bridge_stp} = 1;
1088
1089         $v = defined($d->{bridge_fd}) ? $d->{bridge_fd} : 0;
1090         $raw .= "\tbridge-fd $v\n";
1091         $done->{bridge_fd} = 1;
1092
1093         if( defined($d->{bridge_vlan_aware})) {
1094             $raw .= "\tbridge-vlan-aware yes\n";
1095             $v = defined($d->{bridge_vids}) ? $d->{bridge_vids} : "2-4094";
1096             $raw .= "\tbridge-vids $v\n";
1097         }
1098         $done->{bridge_vlan_aware} = 1;
1099
1100     } elsif ($d->{type} eq 'bond') {
1101
1102         $d->{slaves} =~ s/[;,\s]+/ /g;
1103         my $slaves = $d->{slaves} || 'none';
1104         $raw .= "\tbond-slaves $slaves\n";
1105         $done->{slaves} = 1;
1106
1107         my $v = defined ($d->{'bond_miimon'}) ? $d->{'bond_miimon'} : 100;
1108         $raw .= "\tbond-miimon $v\n";
1109         $done->{'bond_miimon'} = 1;
1110
1111         $v = defined ($d->{'bond_mode'}) ? $d->{'bond_mode'} : 'balance-rr';
1112         $raw .= "\tbond-mode $v\n";
1113         $done->{'bond_mode'} = 1;
1114
1115         if ($d->{'bond_mode'} && $d->{'bond_xmit_hash_policy'} &&
1116             ($d->{'bond_mode'} eq 'balance-xor' || $d->{'bond_mode'} eq '802.3ad')) {
1117             $raw .= "\tbond-xmit-hash-policy $d->{'bond_xmit_hash_policy'}\n";
1118         }
1119         $done->{'bond_xmit_hash_policy'} = 1;
1120
1121     } elsif ($d->{type} eq 'OVSBridge') {
1122
1123         $raw .= "\tovs_type $d->{type}\n";
1124         $done->{ovs_type} = 1;
1125
1126         $raw .= "\tovs_ports $d->{ovs_ports}\n" if $d->{ovs_ports};
1127         $done->{ovs_ports} = 1;
1128     } elsif ($d->{type} eq 'OVSPort' || $d->{type} eq 'OVSIntPort' ||
1129              $d->{type} eq 'OVSBond') {
1130
1131         $d->{autostart} = 0; # started by the bridge
1132
1133         if (defined($d->{ovs_tag})) {
1134             &$set_ovs_option($d, tag => $d->{ovs_tag});
1135         }
1136         $done->{ovs_tag} = 1;
1137
1138         if ($d->{type} eq 'OVSBond') {
1139
1140             $d->{bond_mode} = 'active-backup' if !$d->{bond_mode};
1141
1142             $ovs_bond_modes->{$d->{bond_mode}} ||
1143                 die "OVS does not support bond mode '$d->{bond_mode}\n";
1144
1145             if ($d->{bond_mode} eq 'lacp-balance-slb') {
1146                 &$set_ovs_option($d, lacp => 'active');
1147                 &$set_ovs_option($d, bond_mode => 'balance-slb');
1148             } elsif ($d->{bond_mode} eq 'lacp-balance-tcp') {
1149                 &$set_ovs_option($d, lacp => 'active');
1150                 &$set_ovs_option($d, bond_mode => 'balance-tcp');
1151             } else {
1152                 &$set_ovs_option($d, lacp => undef);
1153                 &$set_ovs_option($d, bond_mode => $d->{bond_mode});
1154             }
1155             $done->{bond_mode} = 1;
1156
1157             $raw .= "\tovs_bonds $d->{ovs_bonds}\n" if $d->{ovs_bonds};
1158             $done->{ovs_bonds} = 1;
1159         }
1160
1161         $raw .= "\tovs_type $d->{type}\n";
1162         $done->{ovs_type} = 1;
1163
1164         if ($d->{ovs_bridge}) {
1165
1166             if ($ifupdown2) {
1167                 $raw = "auto $iface\n$raw";
1168             } else {
1169                 $raw = "allow-$d->{ovs_bridge} $iface\n$raw";
1170             }
1171
1172             $raw .= "\tovs_bridge $d->{ovs_bridge}\n";
1173             $done->{ovs_bridge} = 1;
1174         }
1175     }
1176
1177     if ($first_block) {
1178         # print other settings
1179         foreach my $k (keys %$d) {
1180            next if $done->{$k};
1181            next if !$d->{$k};
1182            $raw .= "\t$k $d->{$k}\n";
1183         }
1184     }
1185
1186     foreach my $option (@{$d->{"options$suffix"}}) {
1187         $raw .= "\t$option\n";
1188     }
1189
1190     # add comments
1191     my $comments = $d->{"comments$suffix"} || '';
1192     foreach my $cl (split(/\n/, $comments)) {
1193         $raw .= "#$cl\n";
1194     }
1195
1196     $raw .= "\n";
1197
1198     return $raw;
1199 }
1200
1201
1202 sub write_etc_network_interfaces {
1203     my ($filename, $fh, $config) = @_;
1204     my $ifupdown2 = -e '/usr/share/ifupdown2';
1205     my $raw = __write_etc_network_interfaces($config, $ifupdown2);
1206     PVE::Tools::safe_print($filename, $fh, $raw);
1207 }
1208 sub __write_etc_network_interfaces {
1209     my ($config, $ifupdown2) = @_;
1210
1211     my $ifaces = $config->{ifaces};
1212     my @options = @{$config->{options}};
1213
1214     my $used_ports = {};
1215
1216     foreach my $iface (keys %$ifaces) {
1217         my $d = $ifaces->{$iface};
1218
1219         my $ports = '';
1220         foreach my $k (qw(bridge_ports ovs_ports slaves ovs_bonds)) {
1221             $ports .= " $d->{$k}" if $d->{$k};
1222         }
1223
1224         foreach my $p (PVE::Tools::split_list($ports)) {
1225             die "port '$p' is already used on interface '$used_ports->{$p}'\n"
1226                 if $used_ports->{$p} && $used_ports->{$p} ne $iface;
1227             $used_ports->{$p} = $iface;
1228         }
1229     }
1230
1231     # delete unused OVS ports
1232     foreach my $iface (keys %$ifaces) {
1233         my $d = $ifaces->{$iface};
1234         if ($d->{type} eq 'OVSPort' || $d->{type} eq 'OVSIntPort' ||
1235             $d->{type} eq 'OVSBond') {
1236             my $brname = $used_ports->{$iface};
1237             if (!$brname || !$ifaces->{$brname}) {
1238                 if ($iface =~ /^$PVE::Network::PHYSICAL_NIC_RE/) {
1239                     $ifaces->{$iface} = { type => 'eth',
1240                                           exists => 1,
1241                                           method => 'manual',
1242                                           families => ['inet'] };
1243                 } else {
1244                     delete $ifaces->{$iface};
1245                 }
1246                 next;
1247             }
1248             my $bd = $ifaces->{$brname};
1249             if ($bd->{type} ne 'OVSBridge') {
1250                 delete $ifaces->{$iface};
1251                 next;
1252             }
1253         }
1254     }
1255
1256     # create OVS bridge ports
1257     foreach my $iface (keys %$ifaces) {
1258         my $d = $ifaces->{$iface};
1259         if ($d->{type} eq 'OVSBridge' && $d->{ovs_ports}) {
1260             foreach my $p (split (/\s+/, $d->{ovs_ports})) {
1261                 my $n = $ifaces->{$p};
1262                 die "OVS bridge '$iface' - unable to find port '$p'\n"
1263                     if !$n;
1264                 $n->{autostart} = 0;
1265                 if ($n->{type} eq 'eth') {
1266                     $n->{type} = 'OVSPort';
1267                     $n->{ovs_bridge} = $iface;
1268                 } elsif ($n->{type} eq 'OVSBond' || $n->{type} eq 'OVSPort' ||
1269                     $n->{type} eq 'OVSIntPort') {
1270                     $n->{ovs_bridge} = $iface;
1271                 } else {
1272                     die "interface '$p' is not defined as OVS port/bond\n";
1273                 }
1274             }
1275         }
1276     }
1277
1278     # check OVS bond ports
1279     foreach my $iface (keys %$ifaces) {
1280         my $d = $ifaces->{$iface};
1281         if ($d->{type} eq 'OVSBond' && $d->{ovs_bonds}) {
1282             foreach my $p (split (/\s+/, $d->{ovs_bonds})) {
1283                 my $n = $ifaces->{$p};
1284                 die "OVS bond '$iface' - unable to find slave '$p'\n"
1285                     if !$n;
1286                 die "OVS bond '$iface' - wrong interface type on slave '$p' " .
1287                     "('$n->{type}' != 'eth')\n" if $n->{type} ne 'eth';
1288             }
1289         }
1290     }
1291
1292     my $raw = <<'NETWORKDOC';
1293 # network interface settings; autogenerated
1294 # Please do NOT modify this file directly, unless you know what
1295 # you're doing.
1296 #
1297 # If you want to manage part of the network configuration manually,
1298 # please utilize the 'source' or 'source-directory' directives to do
1299 # so.
1300 # PVE will preserve these directives, but will NOT its network
1301 # configuration from sourced files, so do not attempt to move any of
1302 # the PVE managed interfaces into external files!
1303
1304 NETWORKDOC
1305
1306     my $printed = {};
1307
1308     my $if_type_hash = {
1309         loopback => 100000,
1310         eth => 200000,
1311         bond => 300000,
1312         bridge => 400000,
1313    };
1314
1315     my $lookup_type_prio = sub {
1316         my $iface = shift;
1317
1318         my $child = 0;
1319         if ($iface =~ m/^(\S+)(\.|:)\d+$/) {
1320             $iface = $1;
1321             $child = 1;
1322         }
1323
1324         my $pri;
1325         if ($iface eq 'lo') {
1326             $pri = $if_type_hash->{loopback};
1327         } elsif ($iface =~ m/^$PVE::Network::PHYSICAL_NIC_RE$/) {
1328             $pri = $if_type_hash->{eth} + $child;
1329         } elsif ($iface =~ m/^bond\d+$/) {
1330             $pri = $if_type_hash->{bond} + $child;
1331         } elsif ($iface =~ m/^vmbr\d+$/) {
1332             $pri = $if_type_hash->{bridge} + $child;
1333         }
1334
1335         return $pri;
1336     };
1337
1338     foreach my $iface (sort {
1339         my $ref1 = $ifaces->{$a};
1340         my $ref2 = $ifaces->{$b};
1341         my $tp1 = &$lookup_type_prio($a);
1342         my $tp2 = &$lookup_type_prio($b);
1343
1344         # Only recognized types are in relation to each other. If one type
1345         # is unknown then only consider the interfaces' priority attributes.
1346         $tp1 = $tp2 = 0 if !defined($tp1) || !defined($tp2);
1347
1348         my $p1 = $tp1 + ($ref1->{priority} // 50000);
1349         my $p2 = $tp2 + ($ref2->{priority} // 50000);
1350
1351         return $p1 <=> $p2 if $p1 != $p2;
1352
1353         return $a cmp $b;
1354     } keys %$ifaces) {
1355         next if $printed->{$iface};
1356
1357         my $d = $ifaces->{$iface};
1358         my $pri = $d->{priority} // 0;
1359         if (@options && $options[0]->[0] < $pri) {
1360             do {
1361                 $raw .= (shift @options)->[1] . "\n";
1362             } while (@options && $options[0]->[0] < $pri);
1363             $raw .= "\n";
1364         }
1365
1366         $printed->{$iface} = 1;
1367         $raw .= "auto $iface\n" if $d->{autostart};
1368         my $i = 0; # some options should be printed only once
1369         $raw .= __interface_to_string($iface, $d, $_, !$i++, $ifupdown2) foreach @{$d->{families}};
1370     }
1371
1372     $raw .= $_->[1] . "\n" foreach @options;
1373     return $raw;
1374 }
1375
1376 register_file('interfaces', "/etc/network/interfaces",
1377               \&read_etc_network_interfaces,
1378               \&write_etc_network_interfaces);
1379
1380
1381 sub read_iscsi_initiatorname {
1382     my ($filename, $fd) = @_;
1383
1384     while (defined(my $line = <$fd>)) {
1385         if ($line =~ m/^InitiatorName=(\S+)$/) {
1386             return $1;
1387         }
1388     }
1389
1390     return 'undefined';
1391 }
1392
1393 register_file('initiatorname', "/etc/iscsi/initiatorname.iscsi",
1394               \&read_iscsi_initiatorname);
1395
1396 sub read_apt_auth {
1397     my ($filename, $fd) = @_;
1398
1399     local $/;
1400
1401     my $raw = defined($fd) ? <$fd> : '';
1402
1403     $raw =~ s/^\s+//;
1404
1405
1406     my @tokens = split(/\s+/, $raw);
1407
1408     my $data = {};
1409
1410     my $machine;
1411     while (defined(my $tok = shift @tokens)) {
1412
1413         $machine = shift @tokens if $tok eq 'machine';
1414         next if !$machine;
1415         $data->{$machine} = {} if !$data->{$machine};
1416
1417         $data->{$machine}->{login} = shift @tokens if $tok eq 'login';
1418         $data->{$machine}->{password} = shift @tokens if $tok eq 'password';
1419     };
1420
1421     return $data;
1422 }
1423
1424 my $format_apt_auth_data = sub {
1425     my $data = shift;
1426
1427     my $raw = '';
1428
1429     foreach my $machine (sort keys %$data) {
1430         my $d = $data->{$machine};
1431         $raw .= "machine $machine\n";
1432         $raw .= " login $d->{login}\n" if $d->{login};
1433         $raw .= " password $d->{password}\n" if $d->{password};
1434         $raw .= "\n";
1435     }
1436
1437     return $raw;
1438 };
1439
1440 sub write_apt_auth {
1441     my ($filename, $fh, $data) = @_;
1442
1443     my $raw = &$format_apt_auth_data($data);
1444
1445     die "write failed: $!" unless print $fh "$raw\n";
1446
1447     return $data;
1448 }
1449
1450 sub update_apt_auth {
1451     my ($filename, $fh, $data) = @_;
1452
1453     my $orig = read_apt_auth($filename, $fh);
1454
1455     foreach my $machine (keys %$data) {
1456         $orig->{$machine} = $data->{$machine};
1457     }
1458
1459     return &$format_apt_auth_data($orig);
1460 }
1461
1462 register_file('apt-auth', "/etc/apt/auth.conf",
1463               \&read_apt_auth, \&write_apt_auth,
1464               \&update_apt_auth, perm => 0640);
1465
1466 1;