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 O_NOFOLLOW O_DIRECTORY);
  14 use Errno qw(ELOOP EROFS);
  15
  16 use PVE::Exception qw(raise_perm_exc);
  17 use PVE::Storage;
  18 use PVE::SafeSyslog;
  19 use PVE::INotify;
  20 use PVE::Tools qw($IPV6RE $IPV4RE dir_glob_foreach lock_file lock_file_full O_PATH);
  21 use PVE::CpuSet;
  22 use PVE::Network;
  23 use PVE::AccessControl;
  24 use PVE::ProcFSTools;
  25 use PVE::LXC::Config;
  26 use Time::HiRes qw (gettimeofday);
  27
  28 use Data::Dumper;
  29
  30 my $nodename = PVE::INotify::nodename();
  31
  32 my $cpuinfo= PVE::ProcFSTools::read_cpuinfo();
  33
  34 our $COMMON_TAR_FLAGS = [ '--sparse', '--numeric-owner', '--acls',
  35                           '--xattrs',
  36                           '--xattrs-include=user.*',
  37                           '--xattrs-include=security.capability',
  38                           '--warning=no-xattr-write' ];
  39
  40 sub config_list {
  41     my $vmlist = PVE::Cluster::get_vmlist();
  42     my $res = {};
  43     return $res if !$vmlist || !$vmlist->{ids};
  44     my $ids = $vmlist->{ids};
  45
  46     foreach my $vmid (keys %$ids) {
  47         next if !$vmid; # skip CT0
  48         my $d = $ids->{$vmid};
  49         next if !$d->{node} || $d->{node} ne $nodename;
  50         next if !$d->{type} || $d->{type} ne 'lxc';
  51         $res->{$vmid}->{type} = 'lxc';
  52     }
  53     return $res;
  54 }
  55
  56 sub destroy_config {
  57     my ($vmid) = @_;
  58
  59     unlink PVE::LXC::Config->config_file($vmid, $nodename);
  60 }
  61
  62 # container status helpers
  63
  64 sub list_active_containers {
  65
  66     my $filename = "/proc/net/unix";
  67
  68     # similar test is used by lcxcontainers.c: list_active_containers
  69     my $res = {};
  70
  71     my $fh = IO::File->new ($filename, "r");
  72     return $res if !$fh;
  73
  74     while (defined(my $line = <$fh>)) {
  75         if ($line =~ m/^[a-f0-9]+:\s+\S+\s+\S+\s+\S+\s+\S+\s+\S+\s+\d+\s+(\S+)$/) {
  76             my $path = $1;
  77             if ($path =~ m!^@/var/lib/lxc/(\d+)/command$!) {
  78                 $res->{$1} = 1;
  79             }
  80         }
  81     }
  82
  83     close($fh);
  84
  85     return $res;
  86 }
  87
  88 # warning: this is slow
  89 sub check_running {
  90     my ($vmid) = @_;
  91
  92     my $active_hash = list_active_containers();
  93
  94     return 1 if defined($active_hash->{$vmid});
  95
  96     return undef;
  97 }
  98
  99 sub get_container_disk_usage {
 100     my ($vmid, $pid) = @_;
 101
 102     return PVE::Tools::df("/proc/$pid/root/", 1);
 103 }
 104
 105 my $last_proc_vmid_stat;
 106
 107 my $parse_cpuacct_stat = sub {
 108     my ($vmid) = @_;
 109
 110     my $raw = read_cgroup_value('cpuacct', $vmid, 'cpuacct.stat', 1);
 111
 112     my $stat = {};
 113
 114     if ($raw =~ m/^user (\d+)\nsystem (\d+)\n/) {
 115
 116         $stat->{utime} = $1;
 117         $stat->{stime} = $2;
 118
 119     }
 120
 121     return $stat;
 122 };
 123
 124 sub vmstatus {
 125     my ($opt_vmid) = @_;
 126
 127     my $list = $opt_vmid ? { $opt_vmid => { type => 'lxc' }} : config_list();
 128
 129     my $active_hash = list_active_containers();
 130
 131     my $cpucount = $cpuinfo->{cpus} || 1;
 132
 133     my $cdtime = gettimeofday;
 134
 135     my $uptime = (PVE::ProcFSTools::read_proc_uptime(1))[0];
 136
 137     foreach my $vmid (keys %$list) {
 138         my $d = $list->{$vmid};
 139
 140         eval { $d->{pid} = find_lxc_pid($vmid) if defined($active_hash->{$vmid}); };
 141         warn $@ if $@; # ignore errors (consider them stopped)
 142
 143         $d->{status} = $d->{pid} ? 'running' : 'stopped';
 144
 145         my $cfspath = PVE::LXC::Config->cfs_config_path($vmid);
 146         my $conf = PVE::Cluster::cfs_read_file($cfspath) || {};
 147
 148         $d->{name} = $conf->{'hostname'} || "CT$vmid";
 149         $d->{name} =~ s/[\s]//g;
 150
 151         $d->{cpus} = $conf->{cores} || $conf->{cpulimit};
 152         $d->{cpus} = $cpucount if !$d->{cpus};
 153
 154         $d->{lock} = $conf->{lock} || '';
 155
 156         if ($d->{pid}) {
 157             my $res = get_container_disk_usage($vmid, $d->{pid});
 158             $d->{disk} = $res->{used};
 159             $d->{maxdisk} = $res->{total};
 160         } else {
 161             $d->{disk} = 0;
 162             # use 4GB by default ??
 163             if (my $rootfs = $conf->{rootfs}) {
 164                 my $rootinfo = PVE::LXC::Config->parse_ct_rootfs($rootfs);
 165                 $d->{maxdisk} = $rootinfo->{size} || (4*1024*1024*1024);
 166             } else {
 167                 $d->{maxdisk} = 4*1024*1024*1024;
 168             }
 169         }
 170
 171         $d->{mem} = 0;
 172         $d->{swap} = 0;
 173         $d->{maxmem} = ($conf->{memory}||512)*1024*1024;
 174         $d->{maxswap} = ($conf->{swap}//0)*1024*1024;
 175
 176         $d->{uptime} = 0;
 177         $d->{cpu} = 0;
 178
 179         $d->{netout} = 0;
 180         $d->{netin} = 0;
 181
 182         $d->{diskread} = 0;
 183         $d->{diskwrite} = 0;
 184
 185         $d->{template} = PVE::LXC::Config->is_template($conf);
 186     }
 187
 188     foreach my $vmid (keys %$list) {
 189         my $d = $list->{$vmid};
 190         my $pid = $d->{pid};
 191
 192         next if !$pid; # skip stopped CTs
 193
 194         my $ctime = (stat("/proc/$pid"))[10]; # 10 = ctime
 195         $d->{uptime} = time - $ctime; # the method lxcfs uses
 196
 197         my $memory_stat = read_cgroup_list('memory', $vmid, 'memory.stat');
 198         my $mem_usage_in_bytes = read_cgroup_value('memory', $vmid, 'memory.usage_in_bytes');
 199
 200         $d->{mem} = $mem_usage_in_bytes - $memory_stat->{cache};
 201         $d->{swap} = read_cgroup_value('memory', $vmid, 'memory.memsw.usage_in_bytes') - $mem_usage_in_bytes;
 202
 203         my $blkio_bytes = read_cgroup_value('blkio', $vmid, 'blkio.throttle.io_service_bytes', 1);
 204         my @bytes = split(/\n/, $blkio_bytes);
 205         foreach my $byte (@bytes) {
 206             if (my ($key, $value) = $byte =~ /(Read|Write)\s+(\d+)/) {
 207                 $d->{diskread} = $2 if $key eq 'Read';
 208                 $d->{diskwrite} = $2 if $key eq 'Write';
 209             }
 210         }
 211
 212         my $pstat = &$parse_cpuacct_stat($vmid);
 213
 214         my $used = $pstat->{utime} + $pstat->{stime};
 215
 216         my $old = $last_proc_vmid_stat->{$vmid};
 217         if (!$old) {
 218             $last_proc_vmid_stat->{$vmid} = {
 219                 time => $cdtime,
 220                 used => $used,
 221                 cpu => 0,
 222             };
 223             next;
 224         }
 225
 226         my $dtime = ($cdtime -  $old->{time}) * $cpucount * $cpuinfo->{user_hz};
 227
 228         if ($dtime > 1000) {
 229             my $dutime = $used -  $old->{used};
 230
 231             $d->{cpu} = (($dutime/$dtime)* $cpucount) / $d->{cpus};
 232             $last_proc_vmid_stat->{$vmid} = {
 233                 time => $cdtime,
 234                 used => $used,
 235                 cpu => $d->{cpu},
 236             };
 237         } else {
 238             $d->{cpu} = $old->{cpu};
 239         }
 240     }
 241
 242     my $netdev = PVE::ProcFSTools::read_proc_net_dev();
 243
 244     foreach my $dev (keys %$netdev) {
 245         next if $dev !~ m/^veth([1-9]\d*)i/;
 246         my $vmid = $1;
 247         my $d = $list->{$vmid};
 248
 249         next if !$d;
 250
 251         $d->{netout} += $netdev->{$dev}->{receive};
 252         $d->{netin} += $netdev->{$dev}->{transmit};
 253
 254     }
 255
 256     return $list;
 257 }
 258
 259 sub read_cgroup_list {
 260     my ($group, $vmid, $name) = @_;
 261
 262     my $content = read_cgroup_value($group, $vmid, $name, 1);
 263
 264     return { split(/\s+/, $content) };
 265 }
 266
 267 sub read_cgroup_value {
 268     my ($group, $vmid, $name, $full) = @_;
 269
 270     my $path = "/sys/fs/cgroup/$group/lxc/$vmid/$name";
 271
 272     return PVE::Tools::file_get_contents($path) if $full;
 273
 274     return PVE::Tools::file_read_firstline($path);
 275 }
 276
 277 sub write_cgroup_value {
 278    my ($group, $vmid, $name, $value) = @_;
 279
 280    my $path = "/sys/fs/cgroup/$group/lxc/$vmid/$name";
 281    PVE::ProcFSTools::write_proc_entry($path, $value) if -e $path;
 282
 283 }
 284
 285 sub find_lxc_console_pids {
 286
 287     my $res = {};
 288
 289     PVE::Tools::dir_glob_foreach('/proc', '\d+', sub {
 290         my ($pid) = @_;
 291
 292         my $cmdline = PVE::Tools::file_read_firstline("/proc/$pid/cmdline");
 293         return if !$cmdline;
 294
 295         my @args = split(/\0/, $cmdline);
 296
 297         # search for lxc-console -n <vmid>
 298         return if scalar(@args) != 3;
 299         return if $args[1] ne '-n';
 300         return if $args[2] !~ m/^\d+$/;
 301         return if $args[0] !~ m|^(/usr/bin/)?lxc-console$|;
 302
 303         my $vmid = $args[2];
 304
 305         push @{$res->{$vmid}}, $pid;
 306     });
 307
 308     return $res;
 309 }
 310
 311 sub find_lxc_pid {
 312     my ($vmid) = @_;
 313
 314     my $pid = undef;
 315     my $parser = sub {
 316         my $line = shift;
 317         $pid = $1 if $line =~ m/^PID:\s+(\d+)$/;
 318     };
 319     PVE::Tools::run_command(['lxc-info', '-n', $vmid, '-p'], outfunc => $parser);
 320
 321     die "unable to get PID for CT $vmid (not running?)\n" if !$pid;
 322
 323     return $pid;
 324 }
 325
 326 # Note: we cannot use Net:IP, because that only allows strict
 327 # CIDR networks
 328 sub parse_ipv4_cidr {
 329     my ($cidr, $noerr) = @_;
 330
 331     if ($cidr =~ m!^($IPV4RE)(?:/(\d+))$! && ($2 > 7) &&  ($2 <= 32)) {
 332         return { address => $1, netmask => $PVE::Network::ipv4_reverse_mask->[$2] };
 333     }
 334
 335     return undef if $noerr;
 336
 337     die "unable to parse ipv4 address/mask\n";
 338 }
 339
 340
 341 sub update_lxc_config {
 342     my ($vmid, $conf) = @_;
 343
 344     my $dir = "/var/lib/lxc/$vmid";
 345
 346     if ($conf->{template}) {
 347
 348         unlink "$dir/config";
 349
 350         return;
 351     }
 352
 353     my $raw = '';
 354
 355     die "missing 'arch' - internal error" if !$conf->{arch};
 356     $raw .= "lxc.arch = $conf->{arch}\n";
 357
 358     my $unprivileged = $conf->{unprivileged};
 359     my $custom_idmap = grep { $_->[0] eq 'lxc.id_map' } @{$conf->{lxc}};
 360
 361     my $ostype = $conf->{ostype} || die "missing 'ostype' - internal error";
 362     if ($ostype =~ /^(?:debian | ubuntu | centos | fedora | opensuse | archlinux | alpine | gentoo | unmanaged)$/x) {
 363         my $inc ="/usr/share/lxc/config/$ostype.common.conf";
 364         $inc ="/usr/share/lxc/config/common.conf" if !-f $inc;
 365         $raw .= "lxc.include = $inc\n";
 366         if ($unprivileged || $custom_idmap) {
 367             $inc = "/usr/share/lxc/config/$ostype.userns.conf";
 368             $inc = "/usr/share/lxc/config/userns.conf" if !-f $inc;
 369             $raw .= "lxc.include = $inc\n"
 370         }
 371     } else {
 372         die "implement me (ostype $ostype)";
 373     }
 374
 375     # WARNING: DO NOT REMOVE this without making sure that loop device nodes
 376     # cannot be exposed to the container with r/w access (cgroup perms).
 377     # When this is enabled mounts will still remain in the monitor's namespace
 378     # after the container unmounted them and thus will not detach from their
 379     # files while the container is running!
 380     $raw .= "lxc.monitor.unshare = 1\n";
 381
 382     # Should we read them from /etc/subuid?
 383     if ($unprivileged && !$custom_idmap) {
 384         $raw .= "lxc.id_map = u 0 100000 65536\n";
 385         $raw .= "lxc.id_map = g 0 100000 65536\n";
 386     }
 387
 388     if (!PVE::LXC::Config->has_dev_console($conf)) {
 389         $raw .= "lxc.console = none\n";
 390         $raw .= "lxc.cgroup.devices.deny = c 5:1 rwm\n";
 391     }
 392
 393     my $ttycount = PVE::LXC::Config->get_tty_count($conf);
 394     $raw .= "lxc.tty = $ttycount\n";
 395
 396     # some init scripts expect a linux terminal (turnkey).
 397     $raw .= "lxc.environment = TERM=linux\n";
 398
 399     my $utsname = $conf->{hostname} || "CT$vmid";
 400     $raw .= "lxc.utsname = $utsname\n";
 401
 402     my $memory = $conf->{memory} || 512;
 403     my $swap = $conf->{swap} // 0;
 404
 405     my $lxcmem = int($memory*1024*1024);
 406     $raw .= "lxc.cgroup.memory.limit_in_bytes = $lxcmem\n";
 407
 408     my $lxcswap = int(($memory + $swap)*1024*1024);
 409     $raw .= "lxc.cgroup.memory.memsw.limit_in_bytes = $lxcswap\n";
 410
 411     if (my $cpulimit = $conf->{cpulimit}) {
 412         $raw .= "lxc.cgroup.cpu.cfs_period_us = 100000\n";
 413         my $value = int(100000*$cpulimit);
 414         $raw .= "lxc.cgroup.cpu.cfs_quota_us = $value\n";
 415     }
 416
 417     my $shares = $conf->{cpuunits} || 1024;
 418     $raw .= "lxc.cgroup.cpu.shares = $shares\n";
 419
 420     die "missing 'rootfs' configuration\n"
 421         if !defined($conf->{rootfs});
 422
 423     my $mountpoint = PVE::LXC::Config->parse_ct_rootfs($conf->{rootfs});
 424
 425     $raw .= "lxc.rootfs = $dir/rootfs\n";
 426
 427     my $netcount = 0;
 428     foreach my $k (sort keys %$conf) {
 429         next if $k !~ m/^net(\d+)$/;
 430         my $ind = $1;
 431         my $d = PVE::LXC::Config->parse_lxc_network($conf->{$k});
 432         $netcount++;
 433         $raw .= "lxc.network.type = veth\n";
 434         $raw .= "lxc.network.veth.pair = veth${vmid}i${ind}\n";
 435         $raw .= "lxc.network.hwaddr = $d->{hwaddr}\n" if defined($d->{hwaddr});
 436         $raw .= "lxc.network.name = $d->{name}\n" if defined($d->{name});
 437         $raw .= "lxc.network.mtu = $d->{mtu}\n" if defined($d->{mtu});
 438     }
 439
 440     my $had_cpuset = 0;
 441     if (my $lxcconf = $conf->{lxc}) {
 442         foreach my $entry (@$lxcconf) {
 443             my ($k, $v) = @$entry;
 444             $netcount++ if $k eq 'lxc.network.type';
 445             $had_cpuset = 1 if $k eq 'lxc.cgroup.cpuset.cpus';
 446             $raw .= "$k = $v\n";
 447         }
 448     }
 449
 450     $raw .= "lxc.network.type = empty\n" if !$netcount;
 451
 452     my $cores = $conf->{cores};
 453     if (!$had_cpuset && $cores) {
 454         my $cpuset = PVE::CpuSet->new_from_cgroup('lxc', 'effective_cpus');
 455         my @members = $cpuset->members();
 456         while (scalar(@members) > $cores) {
 457             my $randidx = int(rand(scalar(@members)));
 458             $cpuset->delete($members[$randidx]);
 459             splice(@members, $randidx, 1); # keep track of the changes
 460         }
 461         $raw .= "lxc.cgroup.cpuset.cpus = ".$cpuset->short_string()."\n";
 462     }
 463
 464     File::Path::mkpath("$dir/rootfs");
 465
 466     PVE::Tools::file_set_contents("$dir/config", $raw);
 467 }
 468
 469 # verify and cleanup nameserver list (replace \0 with ' ')
 470 sub verify_nameserver_list {
 471     my ($nameserver_list) = @_;
 472
 473     my @list = ();
 474     foreach my $server (PVE::Tools::split_list($nameserver_list)) {
 475         PVE::JSONSchema::pve_verify_ip($server);
 476         push @list, $server;
 477     }
 478
 479     return join(' ', @list);
 480 }
 481
 482 sub verify_searchdomain_list {
 483     my ($searchdomain_list) = @_;
 484
 485     my @list = ();
 486     foreach my $server (PVE::Tools::split_list($searchdomain_list)) {
 487         # todo: should we add checks for valid dns domains?
 488         push @list, $server;
 489     }
 490
 491     return join(' ', @list);
 492 }
 493
 494 sub get_console_command {
 495     my ($vmid, $conf) = @_;
 496
 497     my $cmode = PVE::LXC::Config->get_cmode($conf);
 498
 499     if ($cmode eq 'console') {
 500         return ['lxc-console', '-n',  $vmid, '-t', 0];
 501     } elsif ($cmode eq 'tty') {
 502         return ['lxc-console', '-n',  $vmid];
 503     } elsif ($cmode eq 'shell') {
 504         return ['lxc-attach', '--clear-env', '-n', $vmid];
 505     } else {
 506         die "internal error";
 507     }
 508 }
 509
 510 sub get_primary_ips {
 511     my ($conf) = @_;
 512
 513     # return data from net0
 514
 515     return undef if !defined($conf->{net0});
 516     my $net = PVE::LXC::Config->parse_lxc_network($conf->{net0});
 517
 518     my $ipv4 = $net->{ip};
 519     if ($ipv4) {
 520         if ($ipv4 =~ /^(dhcp|manual)$/) {
 521             $ipv4 = undef
 522         } else {
 523             $ipv4 =~ s!/\d+$!!;
 524         }
 525     }
 526     my $ipv6 = $net->{ip6};
 527     if ($ipv6) {
 528         if ($ipv6 =~ /^(auto|dhcp|manual)$/) {
 529             $ipv6 = undef;
 530         } else {
 531             $ipv6 =~ s!/\d+$!!;
 532         }
 533     }
 534
 535     return ($ipv4, $ipv6);
 536 }
 537
 538 sub delete_mountpoint_volume {
 539     my ($storage_cfg, $vmid, $volume) = @_;
 540
 541     return if PVE::LXC::Config->classify_mountpoint($volume) ne 'volume';
 542
 543     my ($vtype, $name, $owner) = PVE::Storage::parse_volname($storage_cfg, $volume);
 544     PVE::Storage::vdisk_free($storage_cfg, $volume) if $vmid == $owner;
 545 }
 546
 547 sub destroy_lxc_container {
 548     my ($storage_cfg, $vmid, $conf, $replacement_conf) = @_;
 549
 550     PVE::LXC::Config->foreach_mountpoint($conf, sub {
 551         my ($ms, $mountpoint) = @_;
 552         delete_mountpoint_volume($storage_cfg, $vmid, $mountpoint->{volume});
 553     });
 554
 555     rmdir "/var/lib/lxc/$vmid/rootfs";
 556     unlink "/var/lib/lxc/$vmid/config";
 557     rmdir "/var/lib/lxc/$vmid";
 558     if (defined $replacement_conf) {
 559         PVE::LXC::Config->write_config($vmid, $replacement_conf);
 560     } else {
 561         destroy_config($vmid);
 562     }
 563
 564     #my $cmd = ['lxc-destroy', '-n', $vmid ];
 565     #PVE::Tools::run_command($cmd);
 566 }
 567
 568 sub vm_stop_cleanup {
 569     my ($storage_cfg, $vmid, $conf, $keepActive) = @_;
 570
 571     eval {
 572         if (!$keepActive) {
 573
 574             my $vollist = PVE::LXC::Config->get_vm_volumes($conf);
 575             PVE::Storage::deactivate_volumes($storage_cfg, $vollist);
 576         }
 577     };
 578     warn $@ if $@; # avoid errors - just warn
 579 }
 580
 581 my $safe_num_ne = sub {
 582     my ($a, $b) = @_;
 583
 584     return 0 if !defined($a) && !defined($b);
 585     return 1 if !defined($a);
 586     return 1 if !defined($b);
 587
 588     return $a != $b;
 589 };
 590
 591 my $safe_string_ne = sub {
 592     my ($a, $b) = @_;
 593
 594     return 0 if !defined($a) && !defined($b);
 595     return 1 if !defined($a);
 596     return 1 if !defined($b);
 597
 598     return $a ne $b;
 599 };
 600
 601 sub update_net {
 602     my ($vmid, $conf, $opt, $newnet, $netid, $rootdir) = @_;
 603
 604     if ($newnet->{type} ne 'veth') {
 605         # for when there are physical interfaces
 606         die "cannot update interface of type $newnet->{type}";
 607     }
 608
 609     my $veth = "veth${vmid}i${netid}";
 610     my $eth = $newnet->{name};
 611
 612     if (my $oldnetcfg = $conf->{$opt}) {
 613         my $oldnet = PVE::LXC::Config->parse_lxc_network($oldnetcfg);
 614
 615         if (&$safe_string_ne($oldnet->{hwaddr}, $newnet->{hwaddr}) ||
 616             &$safe_string_ne($oldnet->{name}, $newnet->{name})) {
 617
 618             PVE::Network::veth_delete($veth);
 619             delete $conf->{$opt};
 620             PVE::LXC::Config->write_config($vmid, $conf);
 621
 622             hotplug_net($vmid, $conf, $opt, $newnet, $netid);
 623
 624         } else {
 625             if (&$safe_string_ne($oldnet->{bridge}, $newnet->{bridge}) ||
 626                 &$safe_num_ne($oldnet->{tag}, $newnet->{tag}) ||
 627                 &$safe_num_ne($oldnet->{firewall}, $newnet->{firewall})) {
 628
 629                 if ($oldnet->{bridge}) {
 630                     PVE::Network::tap_unplug($veth);
 631                     foreach (qw(bridge tag firewall)) {
 632                         delete $oldnet->{$_};
 633                     }
 634                     $conf->{$opt} = PVE::LXC::Config->print_lxc_network($oldnet);
 635                     PVE::LXC::Config->write_config($vmid, $conf);
 636                 }
 637
 638                 PVE::Network::tap_plug($veth, $newnet->{bridge}, $newnet->{tag}, $newnet->{firewall}, $newnet->{trunks}, $newnet->{rate});
 639                 # This includes the rate:
 640                 foreach (qw(bridge tag firewall rate)) {
 641                     $oldnet->{$_} = $newnet->{$_} if $newnet->{$_};
 642                 }
 643             } elsif (&$safe_string_ne($oldnet->{rate}, $newnet->{rate})) {
 644                 # Rate can be applied on its own but any change above needs to
 645                 # include the rate in tap_plug since OVS resets everything.
 646                 PVE::Network::tap_rate_limit($veth, $newnet->{rate});
 647                 $oldnet->{rate} = $newnet->{rate}
 648             }
 649             $conf->{$opt} = PVE::LXC::Config->print_lxc_network($oldnet);
 650             PVE::LXC::Config->write_config($vmid, $conf);
 651         }
 652     } else {
 653         hotplug_net($vmid, $conf, $opt, $newnet, $netid);
 654     }
 655
 656     update_ipconfig($vmid, $conf, $opt, $eth, $newnet, $rootdir);
 657 }
 658
 659 sub hotplug_net {
 660     my ($vmid, $conf, $opt, $newnet, $netid) = @_;
 661
 662     my $veth = "veth${vmid}i${netid}";
 663     my $vethpeer = $veth . "p";
 664     my $eth = $newnet->{name};
 665
 666     PVE::Network::veth_create($veth, $vethpeer, $newnet->{bridge}, $newnet->{hwaddr});
 667     PVE::Network::tap_plug($veth, $newnet->{bridge}, $newnet->{tag}, $newnet->{firewall}, $newnet->{trunks}, $newnet->{rate});
 668
 669     # attach peer in container
 670     my $cmd = ['lxc-device', '-n', $vmid, 'add', $vethpeer, "$eth" ];
 671     PVE::Tools::run_command($cmd);
 672
 673     # link up peer in container
 674     $cmd = ['lxc-attach', '-n', $vmid, '-s', 'NETWORK', '--', '/sbin/ip', 'link', 'set', $eth ,'up'  ];
 675     PVE::Tools::run_command($cmd);
 676
 677     my $done = { type => 'veth' };
 678     foreach (qw(bridge tag firewall hwaddr name)) {
 679         $done->{$_} = $newnet->{$_} if $newnet->{$_};
 680     }
 681     $conf->{$opt} = PVE::LXC::Config->print_lxc_network($done);
 682
 683     PVE::LXC::Config->write_config($vmid, $conf);
 684 }
 685
 686 sub update_ipconfig {
 687     my ($vmid, $conf, $opt, $eth, $newnet, $rootdir) = @_;
 688
 689     my $lxc_setup = PVE::LXC::Setup->new($conf, $rootdir);
 690
 691     my $optdata = PVE::LXC::Config->parse_lxc_network($conf->{$opt});
 692     my $deleted = [];
 693     my $added = [];
 694     my $nscmd = sub {
 695         my $cmdargs = shift;
 696         PVE::Tools::run_command(['lxc-attach', '-n', $vmid, '-s', 'NETWORK', '--', @_], %$cmdargs);
 697     };
 698     my $ipcmd = sub { &$nscmd({}, '/sbin/ip', @_) };
 699
 700     my $change_ip_config = sub {
 701         my ($ipversion) = @_;
 702
 703         my $family_opt = "-$ipversion";
 704         my $suffix = $ipversion == 4 ? '' : $ipversion;
 705         my $gw= "gw$suffix";
 706         my $ip= "ip$suffix";
 707
 708         my $newip = $newnet->{$ip};
 709         my $newgw = $newnet->{$gw};
 710         my $oldip = $optdata->{$ip};
 711
 712         my $change_ip = &$safe_string_ne($oldip, $newip);
 713         my $change_gw = &$safe_string_ne($optdata->{$gw}, $newgw);
 714
 715         return if !$change_ip && !$change_gw;
 716
 717         # step 1: add new IP, if this fails we cancel
 718         my $is_real_ip = ($newip && $newip !~ /^(?:auto|dhcp|manual)$/);
 719         if ($change_ip && $is_real_ip) {
 720             eval { &$ipcmd($family_opt, 'addr', 'add', $newip, 'dev', $eth); };
 721             if (my $err = $@) {
 722                 warn $err;
 723                 return;
 724             }
 725         }
 726
 727         # step 2: replace gateway
 728         #   If this fails we delete the added IP and cancel.
 729         #   If it succeeds we save the config and delete the old IP, ignoring
 730         #   errors. The config is then saved.
 731         # Note: 'ip route replace' can add
 732         if ($change_gw) {
 733             if ($newgw) {
 734                 eval {
 735                     if ($is_real_ip && !PVE::Network::is_ip_in_cidr($newgw, $newip, $ipversion)) {
 736                         &$ipcmd($family_opt, 'route', 'add', $newgw, 'dev', $eth);
 737                     }
 738                     &$ipcmd($family_opt, 'route', 'replace', 'default', 'via', $newgw);
 739                 };
 740                 if (my $err = $@) {
 741                     warn $err;
 742                     # the route was not replaced, the old IP is still available
 743                     # rollback (delete new IP) and cancel
 744                     if ($change_ip) {
 745                         eval { &$ipcmd($family_opt, 'addr', 'del', $newip, 'dev', $eth); };
 746                         warn $@ if $@; # no need to die here
 747                     }
 748                     return;
 749                 }
 750             } else {
 751                 eval { &$ipcmd($family_opt, 'route', 'del', 'default'); };
 752                 # if the route was not deleted, the guest might have deleted it manually
 753                 # warn and continue
 754                 warn $@ if $@;
 755             }
 756         }
 757
 758         # from this point on we save the configuration
 759         # step 3: delete old IP ignoring errors
 760         if ($change_ip && $oldip && $oldip !~ /^(?:auto|dhcp)$/) {
 761             # We need to enable promote_secondaries, otherwise our newly added
 762             # address will be removed along with the old one.
 763             my $promote = 0;
 764             eval {
 765                 if ($ipversion == 4) {
 766                     &$nscmd({ outfunc => sub { $promote = int(shift) } },
 767                             'cat', "/proc/sys/net/ipv4/conf/$eth/promote_secondaries");
 768                     &$nscmd({}, 'sysctl', "net.ipv4.conf.$eth.promote_secondaries=1");
 769                 }
 770                 &$ipcmd($family_opt, 'addr', 'del', $oldip, 'dev', $eth);
 771             };
 772             warn $@ if $@; # no need to die here
 773
 774             if ($ipversion == 4) {
 775                 &$nscmd({}, 'sysctl', "net.ipv4.conf.$eth.promote_secondaries=$promote");
 776             }
 777         }
 778
 779         foreach my $property ($ip, $gw) {
 780             if ($newnet->{$property}) {
 781                 $optdata->{$property} = $newnet->{$property};
 782             } else {
 783                 delete $optdata->{$property};
 784             }
 785         }
 786         $conf->{$opt} = PVE::LXC::Config->print_lxc_network($optdata);
 787         PVE::LXC::Config->write_config($vmid, $conf);
 788         $lxc_setup->setup_network($conf);
 789     };
 790
 791     &$change_ip_config(4);
 792     &$change_ip_config(6);
 793
 794 }
 795
 796 my $enter_namespace = sub {
 797     my ($vmid, $pid, $which, $type) = @_;
 798     sysopen my $fd, "/proc/$pid/ns/$which", O_RDONLY
 799         or die "failed to open $which namespace of container $vmid: $!\n";
 800     PVE::Tools::setns(fileno($fd), $type)
 801         or die "failed to enter $which namespace of container $vmid: $!\n";
 802     close $fd;
 803 };
 804
 805 my $do_syncfs = sub {
 806     my ($vmid, $pid, $socket) = @_;
 807
 808     &$enter_namespace($vmid, $pid, 'mnt', PVE::Tools::CLONE_NEWNS);
 809
 810     # Tell the parent process to start reading our /proc/mounts
 811     print {$socket} "go\n";
 812     $socket->flush();
 813
 814     # Receive /proc/self/mounts
 815     my $mountdata = do { local $/ = undef; <$socket> };
 816     close $socket;
 817
 818     # Now sync all mountpoints...
 819     my $mounts = PVE::ProcFSTools::parse_mounts($mountdata);
 820     foreach my $mp (@$mounts) {
 821         my ($what, $dir, $fs) = @$mp;
 822         next if $fs eq 'fuse.lxcfs';
 823         eval { PVE::Tools::sync_mountpoint($dir); };
 824         warn $@ if $@;
 825     }
 826 };
 827
 828 sub sync_container_namespace {
 829     my ($vmid) = @_;
 830     my $pid = find_lxc_pid($vmid);
 831
 832     # SOCK_DGRAM is nicer for barriers but cannot be slurped
 833     socketpair my $pfd, my $cfd, AF_UNIX, SOCK_STREAM, PF_UNSPEC
 834         or die "failed to create socketpair: $!\n";
 835
 836     my $child = fork();
 837     die "fork failed: $!\n" if !defined($child);
 838
 839     if (!$child) {
 840         eval {
 841             close $pfd;
 842             &$do_syncfs($vmid, $pid, $cfd);
 843         };
 844         if (my $err = $@) {
 845             warn $err;
 846             POSIX::_exit(1);
 847         }
 848         POSIX::_exit(0);
 849     }
 850     close $cfd;
 851     my $go = <$pfd>;
 852     die "failed to enter container namespace\n" if $go ne "go\n";
 853
 854     open my $mounts, '<', "/proc/$child/mounts"
 855         or die "failed to open container's /proc/mounts: $!\n";
 856     my $mountdata = do { local $/ = undef; <$mounts> };
 857     close $mounts;
 858     print {$pfd} $mountdata;
 859     close $pfd;
 860
 861     while (waitpid($child, 0) != $child) {}
 862     die "failed to sync container namespace\n" if $? != 0;
 863 }
 864
 865 sub template_create {
 866     my ($vmid, $conf) = @_;
 867
 868     my $storecfg = PVE::Storage::config();
 869
 870     my $rootinfo = PVE::LXC::Config->parse_ct_rootfs($conf->{rootfs});
 871     my $volid = $rootinfo->{volume};
 872
 873     die "Template feature is not available for '$volid'\n"
 874         if !PVE::Storage::volume_has_feature($storecfg, 'template', $volid);
 875
 876     PVE::Storage::activate_volumes($storecfg, [$volid]);
 877
 878     my $template_volid = PVE::Storage::vdisk_create_base($storecfg, $volid);
 879     $rootinfo->{volume} = $template_volid;
 880     $conf->{rootfs} = PVE::LXC::Config->print_ct_mountpoint($rootinfo, 1);
 881
 882     PVE::LXC::Config->write_config($vmid, $conf);
 883 }
 884
 885 sub check_ct_modify_config_perm {
 886     my ($rpcenv, $authuser, $vmid, $pool, $newconf, $delete) = @_;
 887
 888     return 1 if $authuser eq 'root@pam';
 889
 890     my $check = sub {
 891         my ($opt, $delete) = @_;
 892         if ($opt eq 'cores' || $opt eq 'cpuunits' || $opt eq 'cpulimit') {
 893             $rpcenv->check_vm_perm($authuser, $vmid, $pool, ['VM.Config.CPU']);
 894         } elsif ($opt eq 'rootfs' || $opt =~ /^mp\d+$/) {
 895             $rpcenv->check_vm_perm($authuser, $vmid, $pool, ['VM.Config.Disk']);
 896             return if $delete;
 897             my $data = $opt eq 'rootfs' ? PVE::LXC::Config->parse_ct_rootfs($newconf->{$opt})
 898                                         : PVE::LXC::Config->parse_ct_mountpoint($newconf->{$opt});
 899             raise_perm_exc("mount point type $data->{type}") if $data->{type} ne 'volume';
 900         } elsif ($opt eq 'memory' || $opt eq 'swap') {
 901             $rpcenv->check_vm_perm($authuser, $vmid, $pool, ['VM.Config.Memory']);
 902         } elsif ($opt =~ m/^net\d+$/ || $opt eq 'nameserver' ||
 903                  $opt eq 'searchdomain' || $opt eq 'hostname') {
 904             $rpcenv->check_vm_perm($authuser, $vmid, $pool, ['VM.Config.Network']);
 905         } else {
 906             $rpcenv->check_vm_perm($authuser, $vmid, $pool, ['VM.Config.Options']);
 907         }
 908     };
 909
 910     foreach my $opt (keys %$newconf) {
 911         &$check($opt, 0);
 912     }
 913     foreach my $opt (@$delete) {
 914         &$check($opt, 1);
 915     }
 916
 917     return 1;
 918 }
 919
 920 sub umount_all {
 921     my ($vmid, $storage_cfg, $conf, $noerr) = @_;
 922
 923     my $rootdir = "/var/lib/lxc/$vmid/rootfs";
 924     my $volid_list = PVE::LXC::Config->get_vm_volumes($conf);
 925
 926     PVE::LXC::Config->foreach_mountpoint_reverse($conf, sub {
 927         my ($ms, $mountpoint) = @_;
 928
 929         my $volid = $mountpoint->{volume};
 930         my $mount = $mountpoint->{mp};
 931
 932         return if !$volid || !$mount;
 933
 934         my $mount_path = "$rootdir/$mount";
 935         $mount_path =~ s!/+!/!g;
 936
 937         return if !PVE::ProcFSTools::is_mounted($mount_path);
 938
 939         eval {
 940             PVE::Tools::run_command(['umount', '-d', $mount_path]);
 941         };
 942         if (my $err = $@) {
 943             if ($noerr) {
 944                 warn $err;
 945             } else {
 946                 die $err;
 947             }
 948         }
 949     });
 950 }
 951
 952 sub mount_all {
 953     my ($vmid, $storage_cfg, $conf, $ignore_ro) = @_;
 954
 955     my $rootdir = "/var/lib/lxc/$vmid/rootfs";
 956     File::Path::make_path($rootdir);
 957
 958     my $volid_list = PVE::LXC::Config->get_vm_volumes($conf);
 959     PVE::Storage::activate_volumes($storage_cfg, $volid_list);
 960
 961     eval {
 962         PVE::LXC::Config->foreach_mountpoint($conf, sub {
 963             my ($ms, $mountpoint) = @_;
 964
 965             $mountpoint->{ro} = 0 if $ignore_ro;
 966
 967             mountpoint_mount($mountpoint, $rootdir, $storage_cfg);
 968         });
 969     };
 970     if (my $err = $@) {
 971         warn "mounting container failed\n";
 972         umount_all($vmid, $storage_cfg, $conf, 1);
 973         die $err;
 974     }
 975
 976     return $rootdir;
 977 }
 978
 979
 980 sub mountpoint_mount_path {
 981     my ($mountpoint, $storage_cfg, $snapname) = @_;
 982
 983     return mountpoint_mount($mountpoint, undef, $storage_cfg, $snapname);
 984 }
 985
 986 sub query_loopdev {
 987     my ($path) = @_;
 988     my $found;
 989     my $parser = sub {
 990         my $line = shift;
 991         if ($line =~ m@^(/dev/loop\d+):@) {
 992             $found = $1;
 993         }
 994     };
 995     my $cmd = ['losetup', '--associated', $path];
 996     PVE::Tools::run_command($cmd, outfunc => $parser);
 997     return $found;
 998 }
 999
1000 # Run a function with a file attached to a loop device.
1001 # The loop device is always detached afterwards (or set to autoclear).
1002 # Returns the loop device.
1003 sub run_with_loopdev {
1004     my ($func, $file) = @_;
1005     my $device = query_loopdev($file);
1006     # Try to reuse an existing device
1007     if ($device) {
1008         # We assume that whoever setup the loop device is responsible for
1009         # detaching it.
1010         &$func($device);
1011         return $device;
1012     }
1013
1014     my $parser = sub {
1015         my $line = shift;
1016         if ($line =~ m@^(/dev/loop\d+)$@) {
1017             $device = $1;
1018         }
1019     };
1020     PVE::Tools::run_command(['losetup', '--show', '-f', $file], outfunc => $parser);
1021     die "failed to setup loop device for $file\n" if !$device;
1022     eval { &$func($device); };
1023     my $err = $@;
1024     PVE::Tools::run_command(['losetup', '-d', $device]);
1025     die $err if $err;
1026     return $device;
1027 }
1028
1029 # In scalar mode: returns a file handle to the deepest directory node.
1030 # In list context: returns a list of:
1031 #   * the deepest directory node
1032 #   * the 2nd deepest directory (parent of the above)
1033 #   * directory name of the last directory
1034 # So that the path $2/$3 should lead to $1 afterwards.
1035 sub walk_tree_nofollow($$$) {
1036     my ($start, $subdir, $mkdir) = @_;
1037
1038     # splitdir() returns '' for empty components including the leading /
1039     my @comps = grep { length($_)>0 } File::Spec->splitdir($subdir);
1040
1041     sysopen(my $fd, $start, O_PATH | O_DIRECTORY)
1042         or die "failed to open start directory $start: $!\n";
1043
1044     my $dir = $start;
1045     my $last_component = undef;
1046     my $second = $fd;
1047     foreach my $component (@comps) {
1048         $dir .= "/$component";
1049         my $next = PVE::Tools::openat(fileno($fd), $component, O_NOFOLLOW | O_DIRECTORY);
1050
1051         if (!$next) {
1052             # failed, check for symlinks and try to create the path
1053             die "symlink encountered at: $dir\n" if $! == ELOOP;
1054             die "cannot open directory $dir: $!\n" if !$mkdir;
1055
1056             # We don't check for errors on mkdirat() here and just try to
1057             # openat() again, since at least one error (EEXIST) is an
1058             # expected possibility if multiple containers start
1059             # simultaneously. If someone else injects a symlink now then
1060             # the subsequent openat() will fail due to O_NOFOLLOW anyway.
1061             PVE::Tools::mkdirat(fileno($fd), $component, 0755);
1062
1063             $next = PVE::Tools::openat(fileno($fd), $component, O_NOFOLLOW | O_DIRECTORY);
1064             die "failed to create path: $dir: $!\n" if !$next;
1065         }
1066
1067         close $second if defined($last_component);
1068         $last_component = $component;
1069         $second = $fd;
1070         $fd = $next;
1071     }
1072
1073     return ($fd, defined($last_component) && $second, $last_component) if wantarray;
1074     close $second if defined($last_component);
1075     return $fd;
1076 }
1077
1078 # To guard against symlink attack races against other currently running
1079 # containers with shared recursive bind mount hierarchies we prepare a
1080 # directory handle for the directory we're mounting over to verify the
1081 # mountpoint afterwards.
1082 sub __bindmount_prepare {
1083     my ($hostroot, $dir) = @_;
1084     my $srcdh = walk_tree_nofollow($hostroot, $dir, 0);
1085     return $srcdh;
1086 }
1087
1088 # Assuming we mount to rootfs/a/b/c, verify with the directory handle to 'b'
1089 # ($parentfd) that 'b/c' (openat($parentfd, 'c')) really leads to the directory
1090 # we intended to bind mount.
1091 sub __bindmount_verify {
1092     my ($srcdh, $parentfd, $last_dir, $ro) = @_;
1093     my $destdh;
1094     if ($parentfd) {
1095         # Open the mount point path coming from the parent directory since the
1096         # filehandle we would have gotten as first result of walk_tree_nofollow
1097         # earlier is still a handle to the underlying directory instead of the
1098         # mounted path.
1099         $destdh = PVE::Tools::openat(fileno($parentfd), $last_dir, PVE::Tools::O_PATH | O_NOFOLLOW | O_DIRECTORY);
1100         die "failed to open mount point: $!\n" if !$destdh;
1101         if ($ro) {
1102             my $dot = '.';
1103             # 269: faccessat()
1104             # no separate function because 99% of the time it's the wrong thing to use.
1105             if (syscall(269, fileno($destdh), $dot, &POSIX::W_OK, 0) != -1) {
1106                 die "failed to mark bind mount read only\n";
1107             }
1108             die "read-only check failed: $!\n" if $! != EROFS;
1109         }
1110     } else {
1111         # For the rootfs we don't have a parentfd so we open the path directly.
1112         # Note that this means bindmounting any prefix of the host's
1113         # /var/lib/lxc/$vmid path into another container is considered a grave
1114         # security error.
1115         sysopen $destdh, $last_dir, O_PATH | O_DIRECTORY;
1116         die "failed to open mount point: $!\n" if !$destdh;
1117     }
1118
1119     my ($srcdev, $srcinode) = stat($srcdh);
1120     my ($dstdev, $dstinode) = stat($destdh);
1121     close $srcdh;
1122     close $destdh;
1123
1124     return ($srcdev == $dstdev && $srcinode == $dstinode);
1125 }
1126
1127 # Perform the actual bind mounting:
1128 sub __bindmount_do {
1129     my ($dir, $dest, $ro, @extra_opts) = @_;
1130     PVE::Tools::run_command(['mount', '-o', 'bind', @extra_opts, $dir, $dest]);
1131     if ($ro) {
1132         eval { PVE::Tools::run_command(['mount', '-o', 'bind,remount,ro', $dest]); };
1133         if (my $err = $@) {
1134             warn "bindmount error\n";
1135             # don't leave writable bind-mounts behind...
1136             PVE::Tools::run_command(['umount', $dest]);
1137             die $err;
1138         }
1139     }
1140 }
1141
1142 sub bindmount {
1143     my ($dir, $parentfd, $last_dir, $dest, $ro, @extra_opts) = @_;
1144
1145     my $srcdh = __bindmount_prepare('/', $dir);
1146
1147     __bindmount_do($dir, $dest, $ro, @extra_opts);
1148
1149     if (!__bindmount_verify($srcdh, $parentfd, $last_dir, $ro)) {
1150         PVE::Tools::run_command(['umount', $dest]);
1151         die "detected mount path change at: $dir\n";
1152     }
1153 }
1154
1155 # Cleanup $rootdir a bit (double and trailing slashes), build the mount path
1156 # from $rootdir and $mount and walk the path from $rootdir to the final
1157 # directory to check for symlinks.
1158 sub __mount_prepare_rootdir {
1159     my ($rootdir, $mount) = @_;
1160     $rootdir =~ s!/+!/!g;
1161     $rootdir =~ s!/+$!!;
1162     my $mount_path = "$rootdir/$mount";
1163     my ($mpfd, $parentfd, $last_dir) = walk_tree_nofollow($rootdir, $mount, 1);
1164     return ($rootdir, $mount_path, $mpfd, $parentfd, $last_dir);
1165 }
1166
1167 # use $rootdir = undef to just return the corresponding mount path
1168 sub mountpoint_mount {
1169     my ($mountpoint, $rootdir, $storage_cfg, $snapname) = @_;
1170
1171     my $volid = $mountpoint->{volume};
1172     my $mount = $mountpoint->{mp};
1173     my $type = $mountpoint->{type};
1174     my $quota = !$snapname && !$mountpoint->{ro} && $mountpoint->{quota};
1175     my $mounted_dev;
1176
1177     return if !$volid || !$mount;
1178
1179     $mount =~ s!/+!/!g;
1180
1181     my $mount_path;
1182     my ($mpfd, $parentfd, $last_dir);
1183
1184     if (defined($rootdir)) {
1185         ($rootdir, $mount_path, $mpfd, $parentfd, $last_dir) =
1186             __mount_prepare_rootdir($rootdir, $mount);
1187     }
1188
1189     my ($storage, $volname) = PVE::Storage::parse_volume_id($volid, 1);
1190
1191     die "unknown snapshot path for '$volid'" if !$storage && defined($snapname);
1192
1193     my $optstring = '';
1194     my $acl = $mountpoint->{acl};
1195     if (defined($acl)) {
1196         $optstring .= ($acl ? 'acl' : 'noacl');
1197     }
1198     my $readonly = $mountpoint->{ro};
1199
1200     my @extra_opts = ('-o', $optstring) if $optstring;
1201
1202     if ($storage) {
1203
1204         my $scfg = PVE::Storage::storage_config($storage_cfg, $storage);
1205
1206         # early sanity checks:
1207         # we otherwise call realpath on the rbd url
1208         die "containers on rbd storage without krbd are not supported\n"
1209             if $scfg->{type} eq 'rbd' && !$scfg->{krbd};
1210
1211         my $path = PVE::Storage::path($storage_cfg, $volid, $snapname);
1212
1213         my ($vtype, undef, undef, undef, undef, $isBase, $format) =
1214             PVE::Storage::parse_volname($storage_cfg, $volid);
1215
1216         $format = 'iso' if $vtype eq 'iso'; # allow to handle iso files
1217
1218         if ($format eq 'subvol') {
1219             if ($mount_path) {
1220                 if ($snapname) {
1221                     if ($scfg->{type} eq 'zfspool') {
1222                         my $path_arg = $path;
1223                         $path_arg =~ s!^/+!!;
1224                         PVE::Tools::run_command(['mount', '-o', 'ro', @extra_opts, '-t', 'zfs', $path_arg, $mount_path]);
1225                     } else {
1226                         die "cannot mount subvol snapshots for storage type '$scfg->{type}'\n";
1227                     }
1228                 } else {
1229                     if (defined($acl) && $scfg->{type} eq 'zfspool') {
1230                         my $acltype = ($acl ? 'acltype=posixacl' : 'acltype=noacl');
1231                         my (undef, $name) = PVE::Storage::parse_volname($storage_cfg, $volid);
1232                         $name .= "\@$snapname" if defined($snapname);
1233                         PVE::Tools::run_command(['zfs', 'set', $acltype, "$scfg->{pool}/$name"]);
1234                     }
1235                     bindmount($path, $parentfd, $last_dir//$rootdir, $mount_path, $readonly, @extra_opts);
1236                     warn "cannot enable quota control for bind mounted subvolumes\n" if $quota;
1237                 }
1238             }
1239             return wantarray ? ($path, 0, undef) : $path;
1240         } elsif ($format eq 'raw' || $format eq 'iso') {
1241             # NOTE: 'mount' performs canonicalization without the '-c' switch, which for
1242             # device-mapper devices is special-cased to use the /dev/mapper symlinks.
1243             # Our autodev hook expects the /dev/dm-* device currently
1244             # and will create the /dev/mapper symlink accordingly
1245             $path = Cwd::realpath($path);
1246             die "failed to get device path\n" if !$path;
1247             ($path) = ($path =~ /^(.*)$/s); #untaint
1248             my $domount = sub {
1249                 my ($path) = @_;
1250                 if ($mount_path) {
1251                     if ($format eq 'iso') {
1252                         PVE::Tools::run_command(['mount', '-o', 'ro', @extra_opts, $path, $mount_path]);
1253                     } elsif ($isBase || defined($snapname)) {
1254                         PVE::Tools::run_command(['mount', '-o', 'ro,noload', @extra_opts, $path, $mount_path]);
1255                     } else {
1256                         if ($quota) {
1257                             push @extra_opts, '-o', 'usrjquota=aquota.user,grpjquota=aquota.group,jqfmt=vfsv0';
1258                         }
1259                         push @extra_opts, '-o', 'ro' if $readonly;
1260                         PVE::Tools::run_command(['mount', @extra_opts, $path, $mount_path]);
1261                     }
1262                 }
1263             };
1264             my $use_loopdev = 0;
1265             if ($scfg->{path}) {
1266                 $mounted_dev = run_with_loopdev($domount, $path);
1267                 $use_loopdev = 1;
1268             } elsif ($scfg->{type} eq 'drbd' || $scfg->{type} eq 'lvm' ||
1269                      $scfg->{type} eq 'rbd' || $scfg->{type} eq 'lvmthin') {
1270                 $mounted_dev = $path;
1271                 &$domount($path);
1272             } else {
1273                 die "unsupported storage type '$scfg->{type}'\n";
1274             }
1275             return wantarray ? ($path, $use_loopdev, $mounted_dev) : $path;
1276         } else {
1277             die "unsupported image format '$format'\n";
1278         }
1279     } elsif ($type eq 'device') {
1280         push @extra_opts, '-o', 'ro' if $readonly;
1281         push @extra_opts, '-o', 'usrjquota=aquota.user,grpjquota=aquota.group,jqfmt=vfsv0' if $quota;
1282         # See the NOTE above about devicemapper canonicalization
1283         my ($devpath) = (Cwd::realpath($volid) =~ /^(.*)$/s); # realpath() taints
1284         PVE::Tools::run_command(['mount', @extra_opts, $volid, $mount_path]) if $mount_path;
1285         return wantarray ? ($volid, 0, $devpath) : $volid;
1286     } elsif ($type eq 'bind') {
1287         die "directory '$volid' does not exist\n" if ! -d $volid;
1288         bindmount($volid, $parentfd, $last_dir//$rootdir, $mount_path, $readonly, @extra_opts) if $mount_path;
1289         warn "cannot enable quota control for bind mounts\n" if $quota;
1290         return wantarray ? ($volid, 0, undef) : $volid;
1291     }
1292
1293     die "unsupported storage";
1294 }
1295
1296 sub mkfs {
1297     my ($dev, $rootuid, $rootgid) = @_;
1298
1299     PVE::Tools::run_command(['mkfs.ext4', '-O', 'mmp',
1300                              '-E', "root_owner=$rootuid:$rootgid",
1301                              $dev]);
1302 }
1303
1304 sub format_disk {
1305     my ($storage_cfg, $volid, $rootuid, $rootgid) = @_;
1306
1307     if ($volid =~ m!^/dev/.+!) {
1308         mkfs($volid);
1309         return;
1310     }
1311
1312     my ($storage, $volname) = PVE::Storage::parse_volume_id($volid, 1);
1313
1314     die "cannot format volume '$volid' with no storage\n" if !$storage;
1315
1316     PVE::Storage::activate_volumes($storage_cfg, [$volid]);
1317
1318     my $path = PVE::Storage::path($storage_cfg, $volid);
1319
1320     my ($vtype, undef, undef, undef, undef, $isBase, $format) =
1321         PVE::Storage::parse_volname($storage_cfg, $volid);
1322
1323     die "cannot format volume '$volid' (format == $format)\n"
1324         if $format ne 'raw';
1325
1326     mkfs($path, $rootuid, $rootgid);
1327 }
1328
1329 sub destroy_disks {
1330     my ($storecfg, $vollist) = @_;
1331
1332     foreach my $volid (@$vollist) {
1333         eval { PVE::Storage::vdisk_free($storecfg, $volid); };
1334         warn $@ if $@;
1335     }
1336 }
1337
1338 sub create_disks {
1339     my ($storecfg, $vmid, $settings, $conf) = @_;
1340
1341     my $vollist = [];
1342
1343     eval {
1344         my (undef, $rootuid, $rootgid) = PVE::LXC::parse_id_maps($conf);
1345         my $chown_vollist = [];
1346
1347         PVE::LXC::Config->foreach_mountpoint($settings, sub {
1348             my ($ms, $mountpoint) = @_;
1349
1350             my $volid = $mountpoint->{volume};
1351             my $mp = $mountpoint->{mp};
1352
1353             my ($storage, $volname) = PVE::Storage::parse_volume_id($volid, 1);
1354
1355             if ($storage && ($volid =~ m/^([^:\s]+):(\d+(\.\d+)?)$/)) {
1356                 my ($storeid, $size_gb) = ($1, $2);
1357
1358                 my $size_kb = int(${size_gb}*1024) * 1024;
1359
1360                 my $scfg = PVE::Storage::storage_config($storecfg, $storage);
1361                 # fixme: use better naming ct-$vmid-disk-X.raw?
1362
1363                 if ($scfg->{type} eq 'dir' || $scfg->{type} eq 'nfs') {
1364                     if ($size_kb > 0) {
1365                         $volid = PVE::Storage::vdisk_alloc($storecfg, $storage, $vmid, 'raw',
1366                                                            undef, $size_kb);
1367                         format_disk($storecfg, $volid, $rootuid, $rootgid);
1368                     } else {
1369                         $volid = PVE::Storage::vdisk_alloc($storecfg, $storage, $vmid, 'subvol',
1370                                                            undef, 0);
1371                         push @$chown_vollist, $volid;
1372                     }
1373                 } elsif ($scfg->{type} eq 'zfspool') {
1374
1375                     $volid = PVE::Storage::vdisk_alloc($storecfg, $storage, $vmid, 'subvol',
1376                                                        undef, $size_kb);
1377                     push @$chown_vollist, $volid;
1378                 } elsif ($scfg->{type} eq 'drbd' || $scfg->{type} eq 'lvm' || $scfg->{type} eq 'lvmthin') {
1379
1380                     $volid = PVE::Storage::vdisk_alloc($storecfg, $storage, $vmid, 'raw', undef, $size_kb);
1381                     format_disk($storecfg, $volid, $rootuid, $rootgid);
1382
1383                 } elsif ($scfg->{type} eq 'rbd') {
1384
1385                     die "krbd option must be enabled on storage type '$scfg->{type}'\n" if !$scfg->{krbd};
1386                     $volid = PVE::Storage::vdisk_alloc($storecfg, $storage, $vmid, 'raw', undef, $size_kb);
1387                     format_disk($storecfg, $volid, $rootuid, $rootgid);
1388                 } else {
1389                     die "unable to create containers on storage type '$scfg->{type}'\n";
1390                 }
1391                 push @$vollist, $volid;
1392                 $mountpoint->{volume} = $volid;
1393                 $mountpoint->{size} = $size_kb * 1024;
1394                 $conf->{$ms} = PVE::LXC::Config->print_ct_mountpoint($mountpoint, $ms eq 'rootfs');
1395             } else {
1396                 # use specified/existing volid/dir/device
1397                 $conf->{$ms} = PVE::LXC::Config->print_ct_mountpoint($mountpoint, $ms eq 'rootfs');
1398             }
1399         });
1400
1401         PVE::Storage::activate_volumes($storecfg, $chown_vollist, undef);
1402         foreach my $volid (@$chown_vollist) {
1403             my $path = PVE::Storage::path($storecfg, $volid, undef);
1404             chown($rootuid, $rootgid, $path);
1405         }
1406         PVE::Storage::deactivate_volumes($storecfg, $chown_vollist, undef);
1407     };
1408     # free allocated images on error
1409     if (my $err = $@) {
1410         destroy_disks($storecfg, $vollist);
1411         die $err;
1412     }
1413     return $vollist;
1414 }
1415
1416 # bash completion helper
1417
1418 sub complete_os_templates {
1419     my ($cmdname, $pname, $cvalue) = @_;
1420
1421     my $cfg = PVE::Storage::config();
1422
1423     my $storeid;
1424
1425     if ($cvalue =~ m/^([^:]+):/) {
1426         $storeid = $1;
1427     }
1428
1429     my $vtype = $cmdname eq 'restore' ? 'backup' : 'vztmpl';
1430     my $data = PVE::Storage::template_list($cfg, $storeid, $vtype);
1431
1432     my $res = [];
1433     foreach my $id (keys %$data) {
1434         foreach my $item (@{$data->{$id}}) {
1435             push @$res, $item->{volid} if defined($item->{volid});
1436         }
1437     }
1438
1439     return $res;
1440 }
1441
1442 my $complete_ctid_full = sub {
1443     my ($running) = @_;
1444
1445     my $idlist = vmstatus();
1446
1447     my $active_hash = list_active_containers();
1448
1449     my $res = [];
1450
1451     foreach my $id (keys %$idlist) {
1452         my $d = $idlist->{$id};
1453         if (defined($running)) {
1454             next if $d->{template};
1455             next if $running && !$active_hash->{$id};
1456             next if !$running && $active_hash->{$id};
1457         }
1458         push @$res, $id;
1459
1460     }
1461     return $res;
1462 };
1463
1464 sub complete_ctid {
1465     return &$complete_ctid_full();
1466 }
1467
1468 sub complete_ctid_stopped {
1469     return &$complete_ctid_full(0);
1470 }
1471
1472 sub complete_ctid_running {
1473     return &$complete_ctid_full(1);
1474 }
1475
1476 sub parse_id_maps {
1477     my ($conf) = @_;
1478
1479     my $id_map = [];
1480     my $rootuid = 0;
1481     my $rootgid = 0;
1482
1483     my $lxc = $conf->{lxc};
1484     foreach my $entry (@$lxc) {
1485         my ($key, $value) = @$entry;
1486         next if $key ne 'lxc.id_map';
1487         if ($value =~ /^([ug])\s+(\d+)\s+(\d+)\s+(\d+)\s*$/) {
1488             my ($type, $ct, $host, $length) = ($1, $2, $3, $4);
1489             push @$id_map, [$type, $ct, $host, $length];
1490             if ($ct == 0) {
1491                 $rootuid = $host if $type eq 'u';
1492                 $rootgid = $host if $type eq 'g';
1493             }
1494         } else {
1495             die "failed to parse id_map: $value\n";
1496         }
1497     }
1498
1499     if (!@$id_map && $conf->{unprivileged}) {
1500         # Should we read them from /etc/subuid?
1501         $id_map = [ ['u', '0', '100000', '65536'],
1502                     ['g', '0', '100000', '65536'] ];
1503         $rootuid = $rootgid = 100000;
1504     }
1505
1506     return ($id_map, $rootuid, $rootgid);
1507 }
1508
1509 sub userns_command {
1510     my ($id_map) = @_;
1511     if (@$id_map) {
1512         return ['lxc-usernsexec', (map { ('-m', join(':', @$_)) } @$id_map), '--'];
1513     }
1514     return [];
1515 }
1516
1517
1518 1;