src/PVE/LXC.pm

   1 package PVE::LXC;
   2
   3 use strict;
   4 use warnings;
   5
   6 use POSIX qw(EINTR);
   7
   8 use Socket;
   9
  10 use File::Path;
  11 use File::Spec;
  12 use Cwd qw();
  13 use Fcntl qw(O_RDONLY);
  14
  15 use PVE::Exception qw(raise_perm_exc);
  16 use PVE::Storage;
  17 use PVE::SafeSyslog;
  18 use PVE::INotify;
  19 use PVE::Tools qw($IPV6RE $IPV4RE dir_glob_foreach lock_file lock_file_full);
  20 use PVE::Network;
  21 use PVE::AccessControl;
  22 use PVE::ProcFSTools;
  23 use PVE::LXC::Config;
  24 use Time::HiRes qw (gettimeofday);
  25
  26 use Data::Dumper;
  27
  28 my $nodename = PVE::INotify::nodename();
  29
  30 my $cpuinfo= PVE::ProcFSTools::read_cpuinfo();
  31
  32 our $COMMON_TAR_FLAGS = [ '--sparse', '--numeric-owner', '--acls',
  33                           '--xattrs',
  34                           '--xattrs-include=user.*',
  35                           '--xattrs-include=security.capability',
  36                           '--warning=no-xattr-write' ];
  37
  38 sub config_list {
  39     my $vmlist = PVE::Cluster::get_vmlist();
  40     my $res = {};
  41     return $res if !$vmlist || !$vmlist->{ids};
  42     my $ids = $vmlist->{ids};
  43
  44     foreach my $vmid (keys %$ids) {
  45         next if !$vmid; # skip CT0
  46         my $d = $ids->{$vmid};
  47         next if !$d->{node} || $d->{node} ne $nodename;
  48         next if !$d->{type} || $d->{type} ne 'lxc';
  49         $res->{$vmid}->{type} = 'lxc';
  50     }
  51     return $res;
  52 }
  53
  54 sub destroy_config {
  55     my ($vmid) = @_;
  56
  57     unlink PVE::LXC::Config->config_file($vmid, $nodename);
  58 }
  59
  60 # container status helpers
  61
  62 sub list_active_containers {
  63
  64     my $filename = "/proc/net/unix";
  65
  66     # similar test is used by lcxcontainers.c: list_active_containers
  67     my $res = {};
  68
  69     my $fh = IO::File->new ($filename, "r");
  70     return $res if !$fh;
  71
  72     while (defined(my $line = <$fh>)) {
  73         if ($line =~ m/^[a-f0-9]+:\s+\S+\s+\S+\s+\S+\s+\S+\s+\S+\s+\d+\s+(\S+)$/) {
  74             my $path = $1;
  75             if ($path =~ m!^@/var/lib/lxc/(\d+)/command$!) {
  76                 $res->{$1} = 1;
  77             }
  78         }
  79     }
  80
  81     close($fh);
  82
  83     return $res;
  84 }
  85
  86 # warning: this is slow
  87 sub check_running {
  88     my ($vmid) = @_;
  89
  90     my $active_hash = list_active_containers();
  91
  92     return 1 if defined($active_hash->{$vmid});
  93
  94     return undef;
  95 }
  96
  97 sub get_container_disk_usage {
  98     my ($vmid, $pid) = @_;
  99
 100     return PVE::Tools::df("/proc/$pid/root/", 1);
 101 }
 102
 103 my $last_proc_vmid_stat;
 104
 105 my $parse_cpuacct_stat = sub {
 106     my ($vmid) = @_;
 107
 108     my $raw = read_cgroup_value('cpuacct', $vmid, 'cpuacct.stat', 1);
 109
 110     my $stat = {};
 111
 112     if ($raw =~ m/^user (\d+)\nsystem (\d+)\n/) {
 113
 114         $stat->{utime} = $1;
 115         $stat->{stime} = $2;
 116
 117     }
 118
 119     return $stat;
 120 };
 121
 122 sub vmstatus {
 123     my ($opt_vmid) = @_;
 124
 125     my $list = $opt_vmid ? { $opt_vmid => { type => 'lxc' }} : config_list();
 126
 127     my $active_hash = list_active_containers();
 128
 129     my $cpucount = $cpuinfo->{cpus} || 1;
 130
 131     my $cdtime = gettimeofday;
 132
 133     my $uptime = (PVE::ProcFSTools::read_proc_uptime(1))[0];
 134
 135     foreach my $vmid (keys %$list) {
 136         my $d = $list->{$vmid};
 137
 138         eval { $d->{pid} = find_lxc_pid($vmid) if defined($active_hash->{$vmid}); };
 139         warn $@ if $@; # ignore errors (consider them stopped)
 140
 141         $d->{status} = $d->{pid} ? 'running' : 'stopped';
 142
 143         my $cfspath = PVE::LXC::Config->cfs_config_path($vmid);
 144         my $conf = PVE::Cluster::cfs_read_file($cfspath) || {};
 145
 146         $d->{name} = $conf->{'hostname'} || "CT$vmid";
 147         $d->{name} =~ s/[\s]//g;
 148
 149         $d->{cpus} = $conf->{cpulimit} || $cpucount;
 150
 151         $d->{lock} = $conf->{lock} || '';
 152
 153         if ($d->{pid}) {
 154             my $res = get_container_disk_usage($vmid, $d->{pid});
 155             $d->{disk} = $res->{used};
 156             $d->{maxdisk} = $res->{total};
 157         } else {
 158             $d->{disk} = 0;
 159             # use 4GB by default ??
 160             if (my $rootfs = $conf->{rootfs}) {
 161                 my $rootinfo = PVE::LXC::Config->parse_ct_rootfs($rootfs);
 162                 $d->{maxdisk} = $rootinfo->{size} || (4*1024*1024*1024);
 163             } else {
 164                 $d->{maxdisk} = 4*1024*1024*1024;
 165             }
 166         }
 167
 168         $d->{mem} = 0;
 169         $d->{swap} = 0;
 170         $d->{maxmem} = ($conf->{memory}||512)*1024*1024;
 171         $d->{maxswap} = ($conf->{swap}//0)*1024*1024;
 172
 173         $d->{uptime} = 0;
 174         $d->{cpu} = 0;
 175
 176         $d->{netout} = 0;
 177         $d->{netin} = 0;
 178
 179         $d->{diskread} = 0;
 180         $d->{diskwrite} = 0;
 181
 182         $d->{template} = PVE::LXC::Config->is_template($conf);
 183     }
 184
 185     foreach my $vmid (keys %$list) {
 186         my $d = $list->{$vmid};
 187         my $pid = $d->{pid};
 188
 189         next if !$pid; # skip stopped CTs
 190
 191         my $ctime = (stat("/proc/$pid"))[10]; # 10 = ctime
 192         $d->{uptime} = time - $ctime; # the method lxcfs uses
 193
 194         $d->{mem} = read_cgroup_value('memory', $vmid, 'memory.usage_in_bytes');
 195         $d->{swap} = read_cgroup_value('memory', $vmid, 'memory.memsw.usage_in_bytes') - $d->{mem};
 196
 197         my $blkio_bytes = read_cgroup_value('blkio', $vmid, 'blkio.throttle.io_service_bytes', 1);
 198         my @bytes = split(/\n/, $blkio_bytes);
 199         foreach my $byte (@bytes) {
 200             if (my ($key, $value) = $byte =~ /(Read|Write)\s+(\d+)/) {
 201                 $d->{diskread} = $2 if $key eq 'Read';
 202                 $d->{diskwrite} = $2 if $key eq 'Write';
 203             }
 204         }
 205
 206         my $pstat = &$parse_cpuacct_stat($vmid);
 207
 208         my $used = $pstat->{utime} + $pstat->{stime};
 209
 210         my $old = $last_proc_vmid_stat->{$vmid};
 211         if (!$old) {
 212             $last_proc_vmid_stat->{$vmid} = {
 213                 time => $cdtime,
 214                 used => $used,
 215                 cpu => 0,
 216             };
 217             next;
 218         }
 219
 220         my $dtime = ($cdtime -  $old->{time}) * $cpucount * $cpuinfo->{user_hz};
 221
 222         if ($dtime > 1000) {
 223             my $dutime = $used -  $old->{used};
 224
 225             $d->{cpu} = (($dutime/$dtime)* $cpucount) / $d->{cpus};
 226             $last_proc_vmid_stat->{$vmid} = {
 227                 time => $cdtime,
 228                 used => $used,
 229                 cpu => $d->{cpu},
 230             };
 231         } else {
 232             $d->{cpu} = $old->{cpu};
 233         }
 234     }
 235
 236     my $netdev = PVE::ProcFSTools::read_proc_net_dev();
 237
 238     foreach my $dev (keys %$netdev) {
 239         next if $dev !~ m/^veth([1-9]\d*)i/;
 240         my $vmid = $1;
 241         my $d = $list->{$vmid};
 242
 243         next if !$d;
 244
 245         $d->{netout} += $netdev->{$dev}->{receive};
 246         $d->{netin} += $netdev->{$dev}->{transmit};
 247
 248     }
 249
 250     return $list;
 251 }
 252
 253 sub read_cgroup_value {
 254     my ($group, $vmid, $name, $full) = @_;
 255
 256     my $path = "/sys/fs/cgroup/$group/lxc/$vmid/$name";
 257
 258     return PVE::Tools::file_get_contents($path) if $full;
 259
 260     return PVE::Tools::file_read_firstline($path);
 261 }
 262
 263 sub write_cgroup_value {
 264    my ($group, $vmid, $name, $value) = @_;
 265
 266    my $path = "/sys/fs/cgroup/$group/lxc/$vmid/$name";
 267    PVE::ProcFSTools::write_proc_entry($path, $value) if -e $path;
 268
 269 }
 270
 271 sub find_lxc_console_pids {
 272
 273     my $res = {};
 274
 275     PVE::Tools::dir_glob_foreach('/proc', '\d+', sub {
 276         my ($pid) = @_;
 277
 278         my $cmdline = PVE::Tools::file_read_firstline("/proc/$pid/cmdline");
 279         return if !$cmdline;
 280
 281         my @args = split(/\0/, $cmdline);
 282
 283         # search for lxc-console -n <vmid>
 284         return if scalar(@args) != 3;
 285         return if $args[1] ne '-n';
 286         return if $args[2] !~ m/^\d+$/;
 287         return if $args[0] !~ m|^(/usr/bin/)?lxc-console$|;
 288
 289         my $vmid = $args[2];
 290
 291         push @{$res->{$vmid}}, $pid;
 292     });
 293
 294     return $res;
 295 }
 296
 297 sub find_lxc_pid {
 298     my ($vmid) = @_;
 299
 300     my $pid = undef;
 301     my $parser = sub {
 302         my $line = shift;
 303         $pid = $1 if $line =~ m/^PID:\s+(\d+)$/;
 304     };
 305     PVE::Tools::run_command(['lxc-info', '-n', $vmid, '-p'], outfunc => $parser);
 306
 307     die "unable to get PID for CT $vmid (not running?)\n" if !$pid;
 308
 309     return $pid;
 310 }
 311
 312 # Note: we cannot use Net:IP, because that only allows strict
 313 # CIDR networks
 314 sub parse_ipv4_cidr {
 315     my ($cidr, $noerr) = @_;
 316
 317     if ($cidr =~ m!^($IPV4RE)(?:/(\d+))$! && ($2 > 7) &&  ($2 <= 32)) {
 318         return { address => $1, netmask => $PVE::Network::ipv4_reverse_mask->[$2] };
 319     }
 320
 321     return undef if $noerr;
 322
 323     die "unable to parse ipv4 address/mask\n";
 324 }
 325
 326
 327 sub update_lxc_config {
 328     my ($storage_cfg, $vmid, $conf) = @_;
 329
 330     my $dir = "/var/lib/lxc/$vmid";
 331
 332     if ($conf->{template}) {
 333
 334         unlink "$dir/config";
 335
 336         return;
 337     }
 338
 339     my $raw = '';
 340
 341     die "missing 'arch' - internal error" if !$conf->{arch};
 342     $raw .= "lxc.arch = $conf->{arch}\n";
 343
 344     my $unprivileged = $conf->{unprivileged};
 345     my $custom_idmap = grep { $_->[0] eq 'lxc.id_map' } @{$conf->{lxc}};
 346
 347     my $ostype = $conf->{ostype} || die "missing 'ostype' - internal error";
 348     if ($ostype =~ /^(?:debian | ubuntu | centos | fedora | opensuse | archlinux | alpine | unmanaged)$/x) {
 349         my $inc ="/usr/share/lxc/config/$ostype.common.conf";
 350         $inc ="/usr/share/lxc/config/common.conf" if !-f $inc;
 351         $raw .= "lxc.include = $inc\n";
 352         if ($unprivileged || $custom_idmap) {
 353             $inc = "/usr/share/lxc/config/$ostype.userns.conf";
 354             $inc = "/usr/share/lxc/config/userns.conf" if !-f $inc;
 355             $raw .= "lxc.include = $inc\n"
 356         }
 357     } else {
 358         die "implement me (ostype $ostype)";
 359     }
 360
 361     # WARNING: DO NOT REMOVE this without making sure that loop device nodes
 362     # cannot be exposed to the container with r/w access (cgroup perms).
 363     # When this is enabled mounts will still remain in the monitor's namespace
 364     # after the container unmounted them and thus will not detach from their
 365     # files while the container is running!
 366     $raw .= "lxc.monitor.unshare = 1\n";
 367
 368     # Should we read them from /etc/subuid?
 369     if ($unprivileged && !$custom_idmap) {
 370         $raw .= "lxc.id_map = u 0 100000 65536\n";
 371         $raw .= "lxc.id_map = g 0 100000 65536\n";
 372     }
 373
 374     if (!PVE::LXC::Config->has_dev_console($conf)) {
 375         $raw .= "lxc.console = none\n";
 376         $raw .= "lxc.cgroup.devices.deny = c 5:1 rwm\n";
 377     }
 378
 379     my $ttycount = PVE::LXC::Config->get_tty_count($conf);
 380     $raw .= "lxc.tty = $ttycount\n";
 381
 382     # some init scripts expect a linux terminal (turnkey).
 383     $raw .= "lxc.environment = TERM=linux\n";
 384
 385     my $utsname = $conf->{hostname} || "CT$vmid";
 386     $raw .= "lxc.utsname = $utsname\n";
 387
 388     my $memory = $conf->{memory} || 512;
 389     my $swap = $conf->{swap} // 0;
 390
 391     my $lxcmem = int($memory*1024*1024);
 392     $raw .= "lxc.cgroup.memory.limit_in_bytes = $lxcmem\n";
 393
 394     my $lxcswap = int(($memory + $swap)*1024*1024);
 395     $raw .= "lxc.cgroup.memory.memsw.limit_in_bytes = $lxcswap\n";
 396
 397     if (my $cpulimit = $conf->{cpulimit}) {
 398         $raw .= "lxc.cgroup.cpu.cfs_period_us = 100000\n";
 399         my $value = int(100000*$cpulimit);
 400         $raw .= "lxc.cgroup.cpu.cfs_quota_us = $value\n";
 401     }
 402
 403     my $shares = $conf->{cpuunits} || 1024;
 404     $raw .= "lxc.cgroup.cpu.shares = $shares\n";
 405
 406     die "missing 'rootfs' configuration\n"
 407         if !defined($conf->{rootfs});
 408
 409     my $mountpoint = PVE::LXC::Config->parse_ct_rootfs($conf->{rootfs});
 410
 411     $raw .= "lxc.rootfs = $dir/rootfs\n";
 412
 413     my $netcount = 0;
 414     foreach my $k (keys %$conf) {
 415         next if $k !~ m/^net(\d+)$/;
 416         my $ind = $1;
 417         my $d = PVE::LXC::Config->parse_lxc_network($conf->{$k});
 418         $netcount++;
 419         $raw .= "lxc.network.type = veth\n";
 420         $raw .= "lxc.network.veth.pair = veth${vmid}i${ind}\n";
 421         $raw .= "lxc.network.hwaddr = $d->{hwaddr}\n" if defined($d->{hwaddr});
 422         $raw .= "lxc.network.name = $d->{name}\n" if defined($d->{name});
 423         $raw .= "lxc.network.mtu = $d->{mtu}\n" if defined($d->{mtu});
 424     }
 425
 426     if (my $lxcconf = $conf->{lxc}) {
 427         foreach my $entry (@$lxcconf) {
 428             my ($k, $v) = @$entry;
 429             $netcount++ if $k eq 'lxc.network.type';
 430             $raw .= "$k = $v\n";
 431         }
 432     }
 433
 434     $raw .= "lxc.network.type = empty\n" if !$netcount;
 435
 436     File::Path::mkpath("$dir/rootfs");
 437
 438     PVE::Tools::file_set_contents("$dir/config", $raw);
 439 }
 440
 441 # verify and cleanup nameserver list (replace \0 with ' ')
 442 sub verify_nameserver_list {
 443     my ($nameserver_list) = @_;
 444
 445     my @list = ();
 446     foreach my $server (PVE::Tools::split_list($nameserver_list)) {
 447         PVE::JSONSchema::pve_verify_ip($server);
 448         push @list, $server;
 449     }
 450
 451     return join(' ', @list);
 452 }
 453
 454 sub verify_searchdomain_list {
 455     my ($searchdomain_list) = @_;
 456
 457     my @list = ();
 458     foreach my $server (PVE::Tools::split_list($searchdomain_list)) {
 459         # todo: should we add checks for valid dns domains?
 460         push @list, $server;
 461     }
 462
 463     return join(' ', @list);
 464 }
 465
 466 sub get_console_command {
 467     my ($vmid, $conf) = @_;
 468
 469     my $cmode = PVE::LXC::Config->get_cmode($conf);
 470
 471     if ($cmode eq 'console') {
 472         return ['lxc-console', '-n',  $vmid, '-t', 0];
 473     } elsif ($cmode eq 'tty') {
 474         return ['lxc-console', '-n',  $vmid];
 475     } elsif ($cmode eq 'shell') {
 476         return ['lxc-attach', '--clear-env', '-n', $vmid];
 477     } else {
 478         die "internal error";
 479     }
 480 }
 481
 482 sub get_primary_ips {
 483     my ($conf) = @_;
 484
 485     # return data from net0
 486
 487     return undef if !defined($conf->{net0});
 488     my $net = PVE::LXC::Config->parse_lxc_network($conf->{net0});
 489
 490     my $ipv4 = $net->{ip};
 491     if ($ipv4) {
 492         if ($ipv4 =~ /^(dhcp|manual)$/) {
 493             $ipv4 = undef
 494         } else {
 495             $ipv4 =~ s!/\d+$!!;
 496         }
 497     }
 498     my $ipv6 = $net->{ip6};
 499     if ($ipv6) {
 500         if ($ipv6 =~ /^(auto|dhcp|manual)$/) {
 501             $ipv6 = undef;
 502         } else {
 503             $ipv6 =~ s!/\d+$!!;
 504         }
 505     }
 506
 507     return ($ipv4, $ipv6);
 508 }
 509
 510 sub delete_mountpoint_volume {
 511     my ($storage_cfg, $vmid, $volume) = @_;
 512
 513     return if PVE::LXC::Config->classify_mountpoint($volume) ne 'volume';
 514
 515     my ($vtype, $name, $owner) = PVE::Storage::parse_volname($storage_cfg, $volume);
 516     PVE::Storage::vdisk_free($storage_cfg, $volume) if $vmid == $owner;
 517 }
 518
 519 sub destroy_lxc_container {
 520     my ($storage_cfg, $vmid, $conf) = @_;
 521
 522     PVE::LXC::Config->foreach_mountpoint($conf, sub {
 523         my ($ms, $mountpoint) = @_;
 524         delete_mountpoint_volume($storage_cfg, $vmid, $mountpoint->{volume});
 525     });
 526
 527     rmdir "/var/lib/lxc/$vmid/rootfs";
 528     unlink "/var/lib/lxc/$vmid/config";
 529     rmdir "/var/lib/lxc/$vmid";
 530     destroy_config($vmid);
 531
 532     #my $cmd = ['lxc-destroy', '-n', $vmid ];
 533     #PVE::Tools::run_command($cmd);
 534 }
 535
 536 sub vm_stop_cleanup {
 537     my ($storage_cfg, $vmid, $conf, $keepActive) = @_;
 538
 539     eval {
 540         if (!$keepActive) {
 541
 542             my $vollist = PVE::LXC::Config->get_vm_volumes($conf);
 543             PVE::Storage::deactivate_volumes($storage_cfg, $vollist);
 544         }
 545     };
 546     warn $@ if $@; # avoid errors - just warn
 547 }
 548
 549 my $safe_num_ne = sub {
 550     my ($a, $b) = @_;
 551
 552     return 0 if !defined($a) && !defined($b);
 553     return 1 if !defined($a);
 554     return 1 if !defined($b);
 555
 556     return $a != $b;
 557 };
 558
 559 my $safe_string_ne = sub {
 560     my ($a, $b) = @_;
 561
 562     return 0 if !defined($a) && !defined($b);
 563     return 1 if !defined($a);
 564     return 1 if !defined($b);
 565
 566     return $a ne $b;
 567 };
 568
 569 sub update_net {
 570     my ($vmid, $conf, $opt, $newnet, $netid, $rootdir) = @_;
 571
 572     if ($newnet->{type} ne 'veth') {
 573         # for when there are physical interfaces
 574         die "cannot update interface of type $newnet->{type}";
 575     }
 576
 577     my $veth = "veth${vmid}i${netid}";
 578     my $eth = $newnet->{name};
 579
 580     if (my $oldnetcfg = $conf->{$opt}) {
 581         my $oldnet = PVE::LXC::Config->parse_lxc_network($oldnetcfg);
 582
 583         if (&$safe_string_ne($oldnet->{hwaddr}, $newnet->{hwaddr}) ||
 584             &$safe_string_ne($oldnet->{name}, $newnet->{name})) {
 585
 586             PVE::Network::veth_delete($veth);
 587             delete $conf->{$opt};
 588             PVE::LXC::Config->write_config($vmid, $conf);
 589
 590             hotplug_net($vmid, $conf, $opt, $newnet, $netid);
 591
 592         } else {
 593             if (&$safe_string_ne($oldnet->{bridge}, $newnet->{bridge}) ||
 594                 &$safe_num_ne($oldnet->{tag}, $newnet->{tag}) ||
 595                 &$safe_num_ne($oldnet->{firewall}, $newnet->{firewall})) {
 596
 597                 if ($oldnet->{bridge}) {
 598                     PVE::Network::tap_unplug($veth);
 599                     foreach (qw(bridge tag firewall)) {
 600                         delete $oldnet->{$_};
 601                     }
 602                     $conf->{$opt} = PVE::LXC::Config->print_lxc_network($oldnet);
 603                     PVE::LXC::Config->write_config($vmid, $conf);
 604                 }
 605
 606                 PVE::Network::tap_plug($veth, $newnet->{bridge}, $newnet->{tag}, $newnet->{firewall}, $newnet->{trunks}, $newnet->{rate});
 607                 # This includes the rate:
 608                 foreach (qw(bridge tag firewall rate)) {
 609                     $oldnet->{$_} = $newnet->{$_} if $newnet->{$_};
 610                 }
 611             } elsif (&$safe_string_ne($oldnet->{rate}, $newnet->{rate})) {
 612                 # Rate can be applied on its own but any change above needs to
 613                 # include the rate in tap_plug since OVS resets everything.
 614                 PVE::Network::tap_rate_limit($veth, $newnet->{rate});
 615                 $oldnet->{rate} = $newnet->{rate}
 616             }
 617             $conf->{$opt} = PVE::LXC::Config->print_lxc_network($oldnet);
 618             PVE::LXC::Config->write_config($vmid, $conf);
 619         }
 620     } else {
 621         hotplug_net($vmid, $conf, $opt, $newnet, $netid);
 622     }
 623
 624     update_ipconfig($vmid, $conf, $opt, $eth, $newnet, $rootdir);
 625 }
 626
 627 sub hotplug_net {
 628     my ($vmid, $conf, $opt, $newnet, $netid) = @_;
 629
 630     my $veth = "veth${vmid}i${netid}";
 631     my $vethpeer = $veth . "p";
 632     my $eth = $newnet->{name};
 633
 634     PVE::Network::veth_create($veth, $vethpeer, $newnet->{bridge}, $newnet->{hwaddr});
 635     PVE::Network::tap_plug($veth, $newnet->{bridge}, $newnet->{tag}, $newnet->{firewall}, $newnet->{trunks}, $newnet->{rate});
 636
 637     # attach peer in container
 638     my $cmd = ['lxc-device', '-n', $vmid, 'add', $vethpeer, "$eth" ];
 639     PVE::Tools::run_command($cmd);
 640
 641     # link up peer in container
 642     $cmd = ['lxc-attach', '-n', $vmid, '-s', 'NETWORK', '--', '/sbin/ip', 'link', 'set', $eth ,'up'  ];
 643     PVE::Tools::run_command($cmd);
 644
 645     my $done = { type => 'veth' };
 646     foreach (qw(bridge tag firewall hwaddr name)) {
 647         $done->{$_} = $newnet->{$_} if $newnet->{$_};
 648     }
 649     $conf->{$opt} = PVE::LXC::Config->print_lxc_network($done);
 650
 651     PVE::LXC::Config->write_config($vmid, $conf);
 652 }
 653
 654 sub update_ipconfig {
 655     my ($vmid, $conf, $opt, $eth, $newnet, $rootdir) = @_;
 656
 657     my $lxc_setup = PVE::LXC::Setup->new($conf, $rootdir);
 658
 659     my $optdata = PVE::LXC::Config->parse_lxc_network($conf->{$opt});
 660     my $deleted = [];
 661     my $added = [];
 662     my $nscmd = sub {
 663         my $cmdargs = shift;
 664         PVE::Tools::run_command(['lxc-attach', '-n', $vmid, '-s', 'NETWORK', '--', @_], %$cmdargs);
 665     };
 666     my $ipcmd = sub { &$nscmd({}, '/sbin/ip', @_) };
 667
 668     my $change_ip_config = sub {
 669         my ($ipversion) = @_;
 670
 671         my $family_opt = "-$ipversion";
 672         my $suffix = $ipversion == 4 ? '' : $ipversion;
 673         my $gw= "gw$suffix";
 674         my $ip= "ip$suffix";
 675
 676         my $newip = $newnet->{$ip};
 677         my $newgw = $newnet->{$gw};
 678         my $oldip = $optdata->{$ip};
 679
 680         my $change_ip = &$safe_string_ne($oldip, $newip);
 681         my $change_gw = &$safe_string_ne($optdata->{$gw}, $newgw);
 682
 683         return if !$change_ip && !$change_gw;
 684
 685         # step 1: add new IP, if this fails we cancel
 686         my $is_real_ip = ($newip && $newip !~ /^(?:auto|dhcp|manual)$/);
 687         if ($change_ip && $is_real_ip) {
 688             eval { &$ipcmd($family_opt, 'addr', 'add', $newip, 'dev', $eth); };
 689             if (my $err = $@) {
 690                 warn $err;
 691                 return;
 692             }
 693         }
 694
 695         # step 2: replace gateway
 696         #   If this fails we delete the added IP and cancel.
 697         #   If it succeeds we save the config and delete the old IP, ignoring
 698         #   errors. The config is then saved.
 699         # Note: 'ip route replace' can add
 700         if ($change_gw) {
 701             if ($newgw) {
 702                 eval {
 703                     if ($is_real_ip && !PVE::Network::is_ip_in_cidr($newgw, $newip, $ipversion)) {
 704                         &$ipcmd($family_opt, 'route', 'add', $newgw, 'dev', $eth);
 705                     }
 706                     &$ipcmd($family_opt, 'route', 'replace', 'default', 'via', $newgw);
 707                 };
 708                 if (my $err = $@) {
 709                     warn $err;
 710                     # the route was not replaced, the old IP is still available
 711                     # rollback (delete new IP) and cancel
 712                     if ($change_ip) {
 713                         eval { &$ipcmd($family_opt, 'addr', 'del', $newip, 'dev', $eth); };
 714                         warn $@ if $@; # no need to die here
 715                     }
 716                     return;
 717                 }
 718             } else {
 719                 eval { &$ipcmd($family_opt, 'route', 'del', 'default'); };
 720                 # if the route was not deleted, the guest might have deleted it manually
 721                 # warn and continue
 722                 warn $@ if $@;
 723             }
 724         }
 725
 726         # from this point on we save the configuration
 727         # step 3: delete old IP ignoring errors
 728         if ($change_ip && $oldip && $oldip !~ /^(?:auto|dhcp)$/) {
 729             # We need to enable promote_secondaries, otherwise our newly added
 730             # address will be removed along with the old one.
 731             my $promote = 0;
 732             eval {
 733                 if ($ipversion == 4) {
 734                     &$nscmd({ outfunc => sub { $promote = int(shift) } },
 735                             'cat', "/proc/sys/net/ipv4/conf/$eth/promote_secondaries");
 736                     &$nscmd({}, 'sysctl', "net.ipv4.conf.$eth.promote_secondaries=1");
 737                 }
 738                 &$ipcmd($family_opt, 'addr', 'del', $oldip, 'dev', $eth);
 739             };
 740             warn $@ if $@; # no need to die here
 741
 742             if ($ipversion == 4) {
 743                 &$nscmd({}, 'sysctl', "net.ipv4.conf.$eth.promote_secondaries=$promote");
 744             }
 745         }
 746
 747         foreach my $property ($ip, $gw) {
 748             if ($newnet->{$property}) {
 749                 $optdata->{$property} = $newnet->{$property};
 750             } else {
 751                 delete $optdata->{$property};
 752             }
 753         }
 754         $conf->{$opt} = PVE::LXC::Config->print_lxc_network($optdata);
 755         PVE::LXC::Config->write_config($vmid, $conf);
 756         $lxc_setup->setup_network($conf);
 757     };
 758
 759     &$change_ip_config(4);
 760     &$change_ip_config(6);
 761
 762 }
 763
 764 my $enter_namespace = sub {
 765     my ($vmid, $pid, $which, $type) = @_;
 766     sysopen my $fd, "/proc/$pid/ns/$which", O_RDONLY
 767         or die "failed to open $which namespace of container $vmid: $!\n";
 768     PVE::Tools::setns(fileno($fd), $type)
 769         or die "failed to enter $which namespace of container $vmid: $!\n";
 770     close $fd;
 771 };
 772
 773 my $do_syncfs = sub {
 774     my ($vmid, $pid, $socket) = @_;
 775
 776     &$enter_namespace($vmid, $pid, 'mnt', PVE::Tools::CLONE_NEWNS);
 777
 778     # Tell the parent process to start reading our /proc/mounts
 779     print {$socket} "go\n";
 780     $socket->flush();
 781
 782     # Receive /proc/self/mounts
 783     my $mountdata = do { local $/ = undef; <$socket> };
 784     close $socket;
 785
 786     # Now sync all mountpoints...
 787     my $mounts = PVE::ProcFSTools::parse_mounts($mountdata);
 788     foreach my $mp (@$mounts) {
 789         my ($what, $dir, $fs) = @$mp;
 790         next if $fs eq 'fuse.lxcfs';
 791         eval { PVE::Tools::sync_mountpoint($dir); };
 792         warn $@ if $@;
 793     }
 794 };
 795
 796 sub sync_container_namespace {
 797     my ($vmid) = @_;
 798     my $pid = find_lxc_pid($vmid);
 799
 800     # SOCK_DGRAM is nicer for barriers but cannot be slurped
 801     socketpair my $pfd, my $cfd, AF_UNIX, SOCK_STREAM, PF_UNSPEC
 802         or die "failed to create socketpair: $!\n";
 803
 804     my $child = fork();
 805     die "fork failed: $!\n" if !defined($child);
 806
 807     if (!$child) {
 808         eval {
 809             close $pfd;
 810             &$do_syncfs($vmid, $pid, $cfd);
 811         };
 812         if (my $err = $@) {
 813             warn $err;
 814             POSIX::_exit(1);
 815         }
 816         POSIX::_exit(0);
 817     }
 818     close $cfd;
 819     my $go = <$pfd>;
 820     die "failed to enter container namespace\n" if $go ne "go\n";
 821
 822     open my $mounts, '<', "/proc/$child/mounts"
 823         or die "failed to open container's /proc/mounts: $!\n";
 824     my $mountdata = do { local $/ = undef; <$mounts> };
 825     close $mounts;
 826     print {$pfd} $mountdata;
 827     close $pfd;
 828
 829     while (waitpid($child, 0) != $child) {}
 830     die "failed to sync container namespace\n" if $? != 0;
 831 }
 832
 833 sub template_create {
 834     my ($vmid, $conf) = @_;
 835
 836     my $storecfg = PVE::Storage::config();
 837
 838     my $rootinfo = PVE::LXC::Config->parse_ct_rootfs($conf->{rootfs});
 839     my $volid = $rootinfo->{volume};
 840
 841     die "Template feature is not available for '$volid'\n"
 842         if !PVE::Storage::volume_has_feature($storecfg, 'template', $volid);
 843
 844     PVE::Storage::activate_volumes($storecfg, [$volid]);
 845
 846     my $template_volid = PVE::Storage::vdisk_create_base($storecfg, $volid);
 847     $rootinfo->{volume} = $template_volid;
 848     $conf->{rootfs} = PVE::LXC::Config->print_ct_mountpoint($rootinfo, 1);
 849
 850     PVE::LXC::Config->write_config($vmid, $conf);
 851 }
 852
 853 sub check_ct_modify_config_perm {
 854     my ($rpcenv, $authuser, $vmid, $pool, $newconf, $delete) = @_;
 855
 856     return 1 if $authuser eq 'root@pam';
 857
 858     my $check = sub {
 859         my ($opt, $delete) = @_;
 860         if ($opt eq 'cpus' || $opt eq 'cpuunits' || $opt eq 'cpulimit') {
 861             $rpcenv->check_vm_perm($authuser, $vmid, $pool, ['VM.Config.CPU']);
 862         } elsif ($opt eq 'rootfs' || $opt =~ /^mp\d+$/) {
 863             $rpcenv->check_vm_perm($authuser, $vmid, $pool, ['VM.Config.Disk']);
 864             return if $delete;
 865             my $data = $opt eq 'rootfs' ? PVE::LXC::Config->parse_ct_rootfs($newconf->{$opt})
 866                                         : PVE::LXC::Config->parse_ct_mountpoint($newconf->{$opt});
 867             raise_perm_exc("mountpoint type $data->{type}") if $data->{type} ne 'volume';
 868         } elsif ($opt eq 'memory' || $opt eq 'swap') {
 869             $rpcenv->check_vm_perm($authuser, $vmid, $pool, ['VM.Config.Memory']);
 870         } elsif ($opt =~ m/^net\d+$/ || $opt eq 'nameserver' ||
 871                  $opt eq 'searchdomain' || $opt eq 'hostname') {
 872             $rpcenv->check_vm_perm($authuser, $vmid, $pool, ['VM.Config.Network']);
 873         } else {
 874             $rpcenv->check_vm_perm($authuser, $vmid, $pool, ['VM.Config.Options']);
 875         }
 876     };
 877
 878     foreach my $opt (keys %$newconf) {
 879         &$check($opt, 0);
 880     }
 881     foreach my $opt (@$delete) {
 882         &$check($opt, 1);
 883     }
 884
 885     return 1;
 886 }
 887
 888 sub umount_all {
 889     my ($vmid, $storage_cfg, $conf, $noerr) = @_;
 890
 891     my $rootdir = "/var/lib/lxc/$vmid/rootfs";
 892     my $volid_list = PVE::LXC::Config->get_vm_volumes($conf);
 893
 894     PVE::LXC::Config->foreach_mountpoint_reverse($conf, sub {
 895         my ($ms, $mountpoint) = @_;
 896
 897         my $volid = $mountpoint->{volume};
 898         my $mount = $mountpoint->{mp};
 899
 900         return if !$volid || !$mount;
 901
 902         my $mount_path = "$rootdir/$mount";
 903         $mount_path =~ s!/+!/!g;
 904
 905         return if !PVE::ProcFSTools::is_mounted($mount_path);
 906
 907         eval {
 908             PVE::Tools::run_command(['umount', '-d', $mount_path]);
 909         };
 910         if (my $err = $@) {
 911             if ($noerr) {
 912                 warn $err;
 913             } else {
 914                 die $err;
 915             }
 916         }
 917     });
 918 }
 919
 920 sub mount_all {
 921     my ($vmid, $storage_cfg, $conf) = @_;
 922
 923     my $rootdir = "/var/lib/lxc/$vmid/rootfs";
 924     File::Path::make_path($rootdir);
 925
 926     my $volid_list = PVE::LXC::Config->get_vm_volumes($conf);
 927     PVE::Storage::activate_volumes($storage_cfg, $volid_list);
 928
 929     eval {
 930         PVE::LXC::Config->foreach_mountpoint($conf, sub {
 931             my ($ms, $mountpoint) = @_;
 932
 933             mountpoint_mount($mountpoint, $rootdir, $storage_cfg);
 934         });
 935     };
 936     if (my $err = $@) {
 937         warn "mounting container failed\n";
 938         umount_all($vmid, $storage_cfg, $conf, 1);
 939         die $err;
 940     }
 941
 942     return $rootdir;
 943 }
 944
 945
 946 sub mountpoint_mount_path {
 947     my ($mountpoint, $storage_cfg, $snapname) = @_;
 948
 949     return mountpoint_mount($mountpoint, undef, $storage_cfg, $snapname);
 950 }
 951
 952 my $check_mount_path = sub {
 953     my ($path) = @_;
 954     $path = File::Spec->canonpath($path);
 955     my $real = Cwd::realpath($path);
 956     if ($real ne $path) {
 957         die "mount path modified by symlink: $path != $real";
 958     }
 959 };
 960
 961 sub query_loopdev {
 962     my ($path) = @_;
 963     my $found;
 964     my $parser = sub {
 965         my $line = shift;
 966         if ($line =~ m@^(/dev/loop\d+):@) {
 967             $found = $1;
 968         }
 969     };
 970     my $cmd = ['losetup', '--associated', $path];
 971     PVE::Tools::run_command($cmd, outfunc => $parser);
 972     return $found;
 973 }
 974
 975 # Run a function with a file attached to a loop device.
 976 # The loop device is always detached afterwards (or set to autoclear).
 977 # Returns the loop device.
 978 sub run_with_loopdev {
 979     my ($func, $file) = @_;
 980     my $device = query_loopdev($file);
 981     # Try to reuse an existing device
 982     if ($device) {
 983         # We assume that whoever setup the loop device is responsible for
 984         # detaching it.
 985         &$func($device);
 986         return $device;
 987     }
 988
 989     my $parser = sub {
 990         my $line = shift;
 991         if ($line =~ m@^(/dev/loop\d+)$@) {
 992             $device = $1;
 993         }
 994     };
 995     PVE::Tools::run_command(['losetup', '--show', '-f', $file], outfunc => $parser);
 996     die "failed to setup loop device for $file\n" if !$device;
 997     eval { &$func($device); };
 998     my $err = $@;
 999     PVE::Tools::run_command(['losetup', '-d', $device]);
1000     die $err if $err;
1001     return $device;
1002 }
1003
1004 sub bindmount {
1005     my ($dir, $dest, $ro, @extra_opts) = @_;
1006     PVE::Tools::run_command(['mount', '-o', 'bind', @extra_opts, $dir, $dest]);
1007     if ($ro) {
1008         eval { PVE::Tools::run_command(['mount', '-o', 'bind,remount,ro', $dest]); };
1009         if (my $err = $@) {
1010             warn "bindmount error\n";
1011             # don't leave writable bind-mounts behind...
1012             PVE::Tools::run_command(['umount', $dest]);
1013             die $err;
1014         }
1015     }
1016 }
1017
1018 # use $rootdir = undef to just return the corresponding mount path
1019 sub mountpoint_mount {
1020     my ($mountpoint, $rootdir, $storage_cfg, $snapname) = @_;
1021
1022     my $volid = $mountpoint->{volume};
1023     my $mount = $mountpoint->{mp};
1024     my $type = $mountpoint->{type};
1025     my $quota = !$snapname && !$mountpoint->{ro} && $mountpoint->{quota};
1026     my $mounted_dev;
1027
1028     return if !$volid || !$mount;
1029
1030     my $mount_path;
1031
1032     if (defined($rootdir)) {
1033         $rootdir =~ s!/+$!!;
1034         $mount_path = "$rootdir/$mount";
1035         $mount_path =~ s!/+!/!g;
1036         &$check_mount_path($mount_path);
1037         File::Path::mkpath($mount_path);
1038     }
1039
1040     my ($storage, $volname) = PVE::Storage::parse_volume_id($volid, 1);
1041
1042     die "unknown snapshot path for '$volid'" if !$storage && defined($snapname);
1043
1044     my $optstring = '';
1045     my $acl = $mountpoint->{acl};
1046     if (defined($acl)) {
1047         $optstring .= ($acl ? 'acl' : 'noacl');
1048     }
1049     my $readonly = $mountpoint->{ro};
1050
1051     my @extra_opts = ('-o', $optstring) if $optstring;
1052
1053     if ($storage) {
1054
1055         my $scfg = PVE::Storage::storage_config($storage_cfg, $storage);
1056         my $path = PVE::Storage::path($storage_cfg, $volid, $snapname);
1057
1058         my ($vtype, undef, undef, undef, undef, $isBase, $format) =
1059             PVE::Storage::parse_volname($storage_cfg, $volid);
1060
1061         $format = 'iso' if $vtype eq 'iso'; # allow to handle iso files
1062
1063         if ($format eq 'subvol') {
1064             if ($mount_path) {
1065                 if ($snapname) {
1066                     if ($scfg->{type} eq 'zfspool') {
1067                         my $path_arg = $path;
1068                         $path_arg =~ s!^/+!!;
1069                         PVE::Tools::run_command(['mount', '-o', 'ro', @extra_opts, '-t', 'zfs', $path_arg, $mount_path]);
1070                     } else {
1071                         die "cannot mount subvol snapshots for storage type '$scfg->{type}'\n";
1072                     }
1073                 } else {
1074                     if (defined($acl) && $scfg->{type} eq 'zfspool') {
1075                         my $acltype = ($acl ? 'acltype=posixacl' : 'acltype=noacl');
1076                         my (undef, $name) = PVE::Storage::parse_volname($storage_cfg, $volid);
1077                         $name .= "\@$snapname" if defined($snapname);
1078                         PVE::Tools::run_command(['zfs', 'set', $acltype, "$scfg->{pool}/$name"]);
1079                     }
1080                     bindmount($path, $mount_path, $readonly, @extra_opts);
1081                     warn "cannot enable quota control for bind mounted subvolumes\n" if $quota;
1082                 }
1083             }
1084             return wantarray ? ($path, 0, undef) : $path;
1085         } elsif ($format eq 'raw' || $format eq 'iso') {
1086             # NOTE: 'mount' performs canonicalization without the '-c' switch, which for
1087             # device-mapper devices is special-cased to use the /dev/mapper symlinks.
1088             # Our autodev hook expects the /dev/dm-* device currently
1089             # and will create the /dev/mapper symlink accordingly
1090             ($path) = (Cwd::realpath($path) =~ /^(.*)$/s); # realpath() taints
1091             my $domount = sub {
1092                 my ($path) = @_;
1093                 if ($mount_path) {
1094                     if ($format eq 'iso') {
1095                         PVE::Tools::run_command(['mount', '-o', 'ro', @extra_opts, $path, $mount_path]);
1096                     } elsif ($isBase || defined($snapname)) {
1097                         PVE::Tools::run_command(['mount', '-o', 'ro,noload', @extra_opts, $path, $mount_path]);
1098                     } else {
1099                         if ($quota) {
1100                             push @extra_opts, '-o', 'usrjquota=aquota.user,grpjquota=aquota.group,jqfmt=vfsv0';
1101                         }
1102                         push @extra_opts, '-o', 'ro' if $readonly;
1103                         PVE::Tools::run_command(['mount', @extra_opts, $path, $mount_path]);
1104                     }
1105                 }
1106             };
1107             my $use_loopdev = 0;
1108             if ($scfg->{path}) {
1109                 $mounted_dev = run_with_loopdev($domount, $path);
1110                 $use_loopdev = 1;
1111             } elsif ($scfg->{type} eq 'drbd' || $scfg->{type} eq 'lvm' ||
1112                      $scfg->{type} eq 'rbd' || $scfg->{type} eq 'lvmthin') {
1113                 $mounted_dev = $path;
1114                 &$domount($path);
1115             } else {
1116                 die "unsupported storage type '$scfg->{type}'\n";
1117             }
1118             return wantarray ? ($path, $use_loopdev, $mounted_dev) : $path;
1119         } else {
1120             die "unsupported image format '$format'\n";
1121         }
1122     } elsif ($type eq 'device') {
1123         push @extra_opts, '-o', 'ro' if $readonly;
1124         push @extra_opts, '-o', 'usrjquota=aquota.user,grpjquota=aquota.group,jqfmt=vfsv0' if $quota;
1125         # See the NOTE above about devicemapper canonicalization
1126         my ($devpath) = (Cwd::realpath($volid) =~ /^(.*)$/s); # realpath() taints
1127         PVE::Tools::run_command(['mount', @extra_opts, $volid, $mount_path]) if $mount_path;
1128         return wantarray ? ($volid, 0, $devpath) : $volid;
1129     } elsif ($type eq 'bind') {
1130         die "directory '$volid' does not exist\n" if ! -d $volid;
1131         &$check_mount_path($volid);
1132         bindmount($volid, $mount_path, $readonly, @extra_opts) if $mount_path;
1133         warn "cannot enable quota control for bind mounts\n" if $quota;
1134         return wantarray ? ($volid, 0, undef) : $volid;
1135     }
1136
1137     die "unsupported storage";
1138 }
1139
1140 sub mkfs {
1141     my ($dev, $rootuid, $rootgid) = @_;
1142
1143     PVE::Tools::run_command(['mkfs.ext4', '-O', 'mmp',
1144                              '-E', "root_owner=$rootuid:$rootgid",
1145                              $dev]);
1146 }
1147
1148 sub format_disk {
1149     my ($storage_cfg, $volid, $rootuid, $rootgid) = @_;
1150
1151     if ($volid =~ m!^/dev/.+!) {
1152         mkfs($volid);
1153         return;
1154     }
1155
1156     my ($storage, $volname) = PVE::Storage::parse_volume_id($volid, 1);
1157
1158     die "cannot format volume '$volid' with no storage\n" if !$storage;
1159
1160     PVE::Storage::activate_volumes($storage_cfg, [$volid]);
1161
1162     my $path = PVE::Storage::path($storage_cfg, $volid);
1163
1164     my ($vtype, undef, undef, undef, undef, $isBase, $format) =
1165         PVE::Storage::parse_volname($storage_cfg, $volid);
1166
1167     die "cannot format volume '$volid' (format == $format)\n"
1168         if $format ne 'raw';
1169
1170     mkfs($path, $rootuid, $rootgid);
1171 }
1172
1173 sub destroy_disks {
1174     my ($storecfg, $vollist) = @_;
1175
1176     foreach my $volid (@$vollist) {
1177         eval { PVE::Storage::vdisk_free($storecfg, $volid); };
1178         warn $@ if $@;
1179     }
1180 }
1181
1182 sub create_disks {
1183     my ($storecfg, $vmid, $settings, $conf) = @_;
1184
1185     my $vollist = [];
1186
1187     eval {
1188         my (undef, $rootuid, $rootgid) = PVE::LXC::parse_id_maps($conf);
1189         my $chown_vollist = [];
1190
1191         PVE::LXC::Config->foreach_mountpoint($settings, sub {
1192             my ($ms, $mountpoint) = @_;
1193
1194             my $volid = $mountpoint->{volume};
1195             my $mp = $mountpoint->{mp};
1196
1197             my ($storage, $volname) = PVE::Storage::parse_volume_id($volid, 1);
1198
1199             if ($storage && ($volid =~ m/^([^:\s]+):(\d+(\.\d+)?)$/)) {
1200                 my ($storeid, $size_gb) = ($1, $2);
1201
1202                 my $size_kb = int(${size_gb}*1024) * 1024;
1203
1204                 my $scfg = PVE::Storage::storage_config($storecfg, $storage);
1205                 # fixme: use better naming ct-$vmid-disk-X.raw?
1206
1207                 if ($scfg->{type} eq 'dir' || $scfg->{type} eq 'nfs') {
1208                     if ($size_kb > 0) {
1209                         $volid = PVE::Storage::vdisk_alloc($storecfg, $storage, $vmid, 'raw',
1210                                                            undef, $size_kb);
1211                         format_disk($storecfg, $volid, $rootuid, $rootgid);
1212                     } else {
1213                         $volid = PVE::Storage::vdisk_alloc($storecfg, $storage, $vmid, 'subvol',
1214                                                            undef, 0);
1215                         push @$chown_vollist, $volid;
1216                     }
1217                 } elsif ($scfg->{type} eq 'zfspool') {
1218
1219                     $volid = PVE::Storage::vdisk_alloc($storecfg, $storage, $vmid, 'subvol',
1220                                                        undef, $size_kb);
1221                     push @$chown_vollist, $volid;
1222                 } elsif ($scfg->{type} eq 'drbd' || $scfg->{type} eq 'lvm' || $scfg->{type} eq 'lvmthin') {
1223
1224                     $volid = PVE::Storage::vdisk_alloc($storecfg, $storage, $vmid, 'raw', undef, $size_kb);
1225                     format_disk($storecfg, $volid, $rootuid, $rootgid);
1226
1227                 } elsif ($scfg->{type} eq 'rbd') {
1228
1229                     die "krbd option must be enabled on storage type '$scfg->{type}'\n" if !$scfg->{krbd};
1230                     $volid = PVE::Storage::vdisk_alloc($storecfg, $storage, $vmid, 'raw', undef, $size_kb);
1231                     format_disk($storecfg, $volid, $rootuid, $rootgid);
1232                 } else {
1233                     die "unable to create containers on storage type '$scfg->{type}'\n";
1234                 }
1235                 push @$vollist, $volid;
1236                 $mountpoint->{volume} = $volid;
1237                 $mountpoint->{size} = $size_kb * 1024;
1238                 $conf->{$ms} = PVE::LXC::Config->print_ct_mountpoint($mountpoint, $ms eq 'rootfs');
1239             } else {
1240                 # use specified/existing volid/dir/device
1241                 $conf->{$ms} = PVE::LXC::Config->print_ct_mountpoint($mountpoint, $ms eq 'rootfs');
1242             }
1243         });
1244
1245         PVE::Storage::activate_volumes($storecfg, $chown_vollist, undef);
1246         foreach my $volid (@$chown_vollist) {
1247             my $path = PVE::Storage::path($storecfg, $volid, undef);
1248             chown($rootuid, $rootgid, $path);
1249         }
1250         PVE::Storage::deactivate_volumes($storecfg, $chown_vollist, undef);
1251     };
1252     # free allocated images on error
1253     if (my $err = $@) {
1254         destroy_disks($storecfg, $vollist);
1255         die $err;
1256     }
1257     return $vollist;
1258 }
1259
1260 # bash completion helper
1261
1262 sub complete_os_templates {
1263     my ($cmdname, $pname, $cvalue) = @_;
1264
1265     my $cfg = PVE::Storage::config();
1266
1267     my $storeid;
1268
1269     if ($cvalue =~ m/^([^:]+):/) {
1270         $storeid = $1;
1271     }
1272
1273     my $vtype = $cmdname eq 'restore' ? 'backup' : 'vztmpl';
1274     my $data = PVE::Storage::template_list($cfg, $storeid, $vtype);
1275
1276     my $res = [];
1277     foreach my $id (keys %$data) {
1278         foreach my $item (@{$data->{$id}}) {
1279             push @$res, $item->{volid} if defined($item->{volid});
1280         }
1281     }
1282
1283     return $res;
1284 }
1285
1286 my $complete_ctid_full = sub {
1287     my ($running) = @_;
1288
1289     my $idlist = vmstatus();
1290
1291     my $active_hash = list_active_containers();
1292
1293     my $res = [];
1294
1295     foreach my $id (keys %$idlist) {
1296         my $d = $idlist->{$id};
1297         if (defined($running)) {
1298             next if $d->{template};
1299             next if $running && !$active_hash->{$id};
1300             next if !$running && $active_hash->{$id};
1301         }
1302         push @$res, $id;
1303
1304     }
1305     return $res;
1306 };
1307
1308 sub complete_ctid {
1309     return &$complete_ctid_full();
1310 }
1311
1312 sub complete_ctid_stopped {
1313     return &$complete_ctid_full(0);
1314 }
1315
1316 sub complete_ctid_running {
1317     return &$complete_ctid_full(1);
1318 }
1319
1320 sub parse_id_maps {
1321     my ($conf) = @_;
1322
1323     my $id_map = [];
1324     my $rootuid = 0;
1325     my $rootgid = 0;
1326
1327     my $lxc = $conf->{lxc};
1328     foreach my $entry (@$lxc) {
1329         my ($key, $value) = @$entry;
1330         next if $key ne 'lxc.id_map';
1331         if ($value =~ /^([ug])\s+(\d+)\s+(\d+)\s+(\d+)\s*$/) {
1332             my ($type, $ct, $host, $length) = ($1, $2, $3, $4);
1333             push @$id_map, [$type, $ct, $host, $length];
1334             if ($ct == 0) {
1335                 $rootuid = $host if $type eq 'u';
1336                 $rootgid = $host if $type eq 'g';
1337             }
1338         } else {
1339             die "failed to parse id_map: $value\n";
1340         }
1341     }
1342
1343     if (!@$id_map && $conf->{unprivileged}) {
1344         # Should we read them from /etc/subuid?
1345         $id_map = [ ['u', '0', '100000', '65536'],
1346                     ['g', '0', '100000', '65536'] ];
1347         $rootuid = $rootgid = 100000;
1348     }
1349
1350     return ($id_map, $rootuid, $rootgid);
1351 }
1352
1353 sub userns_command {
1354     my ($id_map) = @_;
1355     if (@$id_map) {
1356         return ['lxc-usernsexec', (map { ('-m', join(':', @$_)) } @$id_map), '--'];
1357     }
1358     return [];
1359 }
1360
1361
1362 1;