PVE/Storage.pm

   1 package PVE::Storage;
   2
   3 use strict;
   4 use warnings;
   5 use Data::Dumper;
   6
   7 use POSIX;
   8 use IO::Select;
   9 use IO::File;
  10 use IO::Socket::IP;
  11 use File::Basename;
  12 use File::Path;
  13 use Cwd 'abs_path';
  14 use Socket;
  15
  16 use PVE::Tools qw(run_command file_read_firstline dir_glob_foreach $IPV6RE);
  17 use PVE::Cluster qw(cfs_read_file cfs_write_file cfs_lock_file);
  18 use PVE::Exception qw(raise_param_exc);
  19 use PVE::JSONSchema;
  20 use PVE::INotify;
  21 use PVE::RPCEnvironment;
  22
  23 use PVE::Storage::Plugin;
  24 use PVE::Storage::DirPlugin;
  25 use PVE::Storage::LVMPlugin;
  26 use PVE::Storage::LvmThinPlugin;
  27 use PVE::Storage::NFSPlugin;
  28 use PVE::Storage::CIFSPlugin;
  29 use PVE::Storage::ISCSIPlugin;
  30 use PVE::Storage::RBDPlugin;
  31 use PVE::Storage::SheepdogPlugin;
  32 use PVE::Storage::ISCSIDirectPlugin;
  33 use PVE::Storage::GlusterfsPlugin;
  34 use PVE::Storage::ZFSPoolPlugin;
  35 use PVE::Storage::ZFSPlugin;
  36 use PVE::Storage::DRBDPlugin;
  37
  38 # Storage API version. Icrement it on changes in storage API interface.
  39 use constant APIVER => 1;
  40
  41 # load standard plugins
  42 PVE::Storage::DirPlugin->register();
  43 PVE::Storage::LVMPlugin->register();
  44 PVE::Storage::LvmThinPlugin->register();
  45 PVE::Storage::NFSPlugin->register();
  46 PVE::Storage::CIFSPlugin->register();
  47 PVE::Storage::ISCSIPlugin->register();
  48 PVE::Storage::RBDPlugin->register();
  49 PVE::Storage::SheepdogPlugin->register();
  50 PVE::Storage::ISCSIDirectPlugin->register();
  51 PVE::Storage::GlusterfsPlugin->register();
  52 PVE::Storage::ZFSPoolPlugin->register();
  53 PVE::Storage::ZFSPlugin->register();
  54 PVE::Storage::DRBDPlugin->register();
  55
  56 # load third-party plugins
  57 if ( -d '/usr/share/perl5/PVE/Storage/Custom' ) {
  58     dir_glob_foreach('/usr/share/perl5/PVE/Storage/Custom', '.*\.pm$', sub {
  59         my ($file) = @_;
  60         my $modname = 'PVE::Storage::Custom::' . $file;
  61         $modname =~ s!\.pm$!!;
  62         $file = 'PVE/Storage/Custom/' . $file;
  63
  64         eval {
  65             require $file;
  66         };
  67         if ($@) {
  68             warn $@;
  69         # Check storage API version and that file is really storage plugin.
  70         } elsif ($modname->isa('PVE::Storage::Plugin') && $modname->can('api') && $modname->api() == APIVER) {
  71             eval {
  72                 import $file;
  73                 $modname->register();
  74             };
  75             warn $@ if $@;
  76         } else {
  77             warn "Error loading storage plugin \"$modname\" because of API version mismatch. Please, update it.\n"
  78         }
  79     });
  80 }
  81
  82 # initialize all plugins
  83 PVE::Storage::Plugin->init();
  84
  85 my $UDEVADM = '/sbin/udevadm';
  86
  87 #  PVE::Storage utility functions
  88
  89 sub config {
  90     return cfs_read_file("storage.cfg");
  91 }
  92
  93 sub write_config {
  94     my ($cfg) = @_;
  95
  96     cfs_write_file('storage.cfg', $cfg);
  97 }
  98
  99 sub lock_storage_config {
 100     my ($code, $errmsg) = @_;
 101
 102     cfs_lock_file("storage.cfg", undef, $code);
 103     my $err = $@;
 104     if ($err) {
 105         $errmsg ? die "$errmsg: $err" : die $err;
 106     }
 107 }
 108
 109 sub storage_config {
 110     my ($cfg, $storeid, $noerr) = @_;
 111
 112     die "no storage ID specified\n" if !$storeid;
 113
 114     my $scfg = $cfg->{ids}->{$storeid};
 115
 116     die "storage '$storeid' does not exists\n" if (!$noerr && !$scfg);
 117
 118     return $scfg;
 119 }
 120
 121 sub storage_check_node {
 122     my ($cfg, $storeid, $node, $noerr) = @_;
 123
 124     my $scfg = storage_config($cfg, $storeid);
 125
 126     if ($scfg->{nodes}) {
 127         $node = PVE::INotify::nodename() if !$node || ($node eq 'localhost');
 128         if (!$scfg->{nodes}->{$node}) {
 129             die "storage '$storeid' is not available on node '$node'\n" if !$noerr;
 130             return undef;
 131         }
 132     }
 133
 134     return $scfg;
 135 }
 136
 137 sub storage_check_enabled {
 138     my ($cfg, $storeid, $node, $noerr) = @_;
 139
 140     my $scfg = storage_config($cfg, $storeid);
 141
 142     if ($scfg->{disable}) {
 143         die "storage '$storeid' is disabled\n" if !$noerr;
 144         return undef;
 145     }
 146
 147     return storage_check_node($cfg, $storeid, $node, $noerr);
 148 }
 149
 150 # storage_can_replicate:
 151 # return true if storage supports replication
 152 # (volumes alocated with vdisk_alloc() has replication feature)
 153 sub storage_can_replicate {
 154     my ($cfg, $storeid, $format) = @_;
 155
 156     my $scfg = storage_config($cfg, $storeid);
 157     my $plugin = PVE::Storage::Plugin->lookup($scfg->{type});
 158     return $plugin->storage_can_replicate($scfg, $storeid, $format);
 159 }
 160
 161 sub storage_ids {
 162     my ($cfg) = @_;
 163
 164     return keys %{$cfg->{ids}};
 165 }
 166
 167 sub file_size_info {
 168     my ($filename, $timeout) = @_;
 169
 170     return PVE::Storage::Plugin::file_size_info($filename, $timeout);
 171 }
 172
 173 sub volume_size_info {
 174     my ($cfg, $volid, $timeout) = @_;
 175
 176     my ($storeid, $volname) = parse_volume_id($volid, 1);
 177     if ($storeid) {
 178         my $scfg = storage_config($cfg, $storeid);
 179         my $plugin = PVE::Storage::Plugin->lookup($scfg->{type});
 180         return $plugin->volume_size_info($scfg, $storeid, $volname, $timeout);
 181     } elsif ($volid =~ m|^(/.+)$| && -e $volid) {
 182         return file_size_info($volid, $timeout);
 183     } else {
 184         return 0;
 185     }
 186 }
 187
 188 sub volume_resize {
 189     my ($cfg, $volid, $size, $running) = @_;
 190
 191     my ($storeid, $volname) = parse_volume_id($volid, 1);
 192     if ($storeid) {
 193         my $scfg = storage_config($cfg, $storeid);
 194         my $plugin = PVE::Storage::Plugin->lookup($scfg->{type});
 195         return $plugin->volume_resize($scfg, $storeid, $volname, $size, $running);
 196     } elsif ($volid =~ m|^(/.+)$| && -e $volid) {
 197         die "resize file/device '$volid' is not possible\n";
 198     } else {
 199         die "unable to parse volume ID '$volid'\n";
 200     }
 201 }
 202
 203 sub volume_rollback_is_possible {
 204     my ($cfg, $volid, $snap) = @_;
 205
 206     my ($storeid, $volname) = parse_volume_id($volid, 1);
 207     if ($storeid) {
 208         my $scfg = storage_config($cfg, $storeid);
 209         my $plugin = PVE::Storage::Plugin->lookup($scfg->{type});
 210         return $plugin->volume_rollback_is_possible($scfg, $storeid, $volname, $snap);
 211     } elsif ($volid =~ m|^(/.+)$| && -e $volid) {
 212         die "snapshot rollback file/device '$volid' is not possible\n";
 213     } else {
 214         die "unable to parse volume ID '$volid'\n";
 215     }
 216 }
 217
 218 sub volume_snapshot {
 219     my ($cfg, $volid, $snap) = @_;
 220
 221     my ($storeid, $volname) = parse_volume_id($volid, 1);
 222     if ($storeid) {
 223         my $scfg = storage_config($cfg, $storeid);
 224         my $plugin = PVE::Storage::Plugin->lookup($scfg->{type});
 225         return $plugin->volume_snapshot($scfg, $storeid, $volname, $snap);
 226     } elsif ($volid =~ m|^(/.+)$| && -e $volid) {
 227         die "snapshot file/device '$volid' is not possible\n";
 228     } else {
 229         die "unable to parse volume ID '$volid'\n";
 230     }
 231 }
 232
 233 sub volume_snapshot_rollback {
 234     my ($cfg, $volid, $snap) = @_;
 235
 236     my ($storeid, $volname) = parse_volume_id($volid, 1);
 237     if ($storeid) {
 238         my $scfg = storage_config($cfg, $storeid);
 239         my $plugin = PVE::Storage::Plugin->lookup($scfg->{type});
 240         $plugin->volume_rollback_is_possible($scfg, $storeid, $volname, $snap);
 241         return $plugin->volume_snapshot_rollback($scfg, $storeid, $volname, $snap);
 242     } elsif ($volid =~ m|^(/.+)$| && -e $volid) {
 243         die "snapshot rollback file/device '$volid' is not possible\n";
 244     } else {
 245         die "unable to parse volume ID '$volid'\n";
 246     }
 247 }
 248
 249 sub volume_snapshot_delete {
 250     my ($cfg, $volid, $snap, $running) = @_;
 251
 252     my ($storeid, $volname) = parse_volume_id($volid, 1);
 253     if ($storeid) {
 254         my $scfg = storage_config($cfg, $storeid);
 255         my $plugin = PVE::Storage::Plugin->lookup($scfg->{type});
 256         return $plugin->volume_snapshot_delete($scfg, $storeid, $volname, $snap, $running);
 257     } elsif ($volid =~ m|^(/.+)$| && -e $volid) {
 258         die "snapshot delete file/device '$volid' is not possible\n";
 259     } else {
 260         die "unable to parse volume ID '$volid'\n";
 261     }
 262 }
 263
 264 sub volume_has_feature {
 265     my ($cfg, $feature, $volid, $snap, $running) = @_;
 266
 267     my ($storeid, $volname) = parse_volume_id($volid, 1);
 268     if ($storeid) {
 269         my $scfg = storage_config($cfg, $storeid);
 270         my $plugin = PVE::Storage::Plugin->lookup($scfg->{type});
 271         return $plugin->volume_has_feature($scfg, $feature, $storeid, $volname, $snap, $running);
 272     } elsif ($volid =~ m|^(/.+)$| && -e $volid) {
 273         return undef;
 274     } else {
 275         return undef;
 276     }
 277 }
 278
 279 sub volume_snapshot_list {
 280     my ($cfg, $volid) = @_;
 281
 282     my ($storeid, $volname) = parse_volume_id($volid, 1);
 283     if ($storeid) {
 284         my $scfg = storage_config($cfg, $storeid);
 285         my $plugin = PVE::Storage::Plugin->lookup($scfg->{type});
 286         return $plugin->volume_snapshot_list($scfg, $storeid, $volname);
 287     } elsif ($volid =~ m|^(/.+)$| && -e $volid) {
 288         die "send file/device '$volid' is not possible\n";
 289     } else {
 290         die "unable to parse volume ID '$volid'\n";
 291     }
 292     # return an empty array if dataset does not exist.
 293 }
 294
 295 sub get_image_dir {
 296     my ($cfg, $storeid, $vmid) = @_;
 297
 298     my $scfg = storage_config($cfg, $storeid);
 299     my $plugin = PVE::Storage::Plugin->lookup($scfg->{type});
 300
 301     my $path = $plugin->get_subdir($scfg, 'images');
 302
 303     return $vmid ? "$path/$vmid" : $path;
 304 }
 305
 306 sub get_private_dir {
 307     my ($cfg, $storeid, $vmid) = @_;
 308
 309     my $scfg = storage_config($cfg, $storeid);
 310     my $plugin = PVE::Storage::Plugin->lookup($scfg->{type});
 311
 312     my $path = $plugin->get_subdir($scfg, 'rootdir');
 313
 314     return $vmid ? "$path/$vmid" : $path;
 315 }
 316
 317 sub get_iso_dir {
 318     my ($cfg, $storeid) = @_;
 319
 320     my $scfg = storage_config($cfg, $storeid);
 321     my $plugin = PVE::Storage::Plugin->lookup($scfg->{type});
 322
 323     return $plugin->get_subdir($scfg, 'iso');
 324 }
 325
 326 sub get_vztmpl_dir {
 327     my ($cfg, $storeid) = @_;
 328
 329     my $scfg = storage_config($cfg, $storeid);
 330     my $plugin = PVE::Storage::Plugin->lookup($scfg->{type});
 331
 332     return $plugin->get_subdir($scfg, 'vztmpl');
 333 }
 334
 335 sub get_backup_dir {
 336     my ($cfg, $storeid) = @_;
 337
 338     my $scfg = storage_config($cfg, $storeid);
 339     my $plugin = PVE::Storage::Plugin->lookup($scfg->{type});
 340
 341     return $plugin->get_subdir($scfg, 'backup');
 342 }
 343
 344 # library implementation
 345
 346 sub parse_vmid {
 347     my $vmid = shift;
 348
 349     die "VMID '$vmid' contains illegal characters\n" if $vmid !~ m/^\d+$/;
 350
 351     return int($vmid);
 352 }
 353
 354 # NOTE: basename and basevmid are always undef for LVM-thin, where the
 355 # clone -> base reference is not encoded in the volume ID.
 356 # see note in PVE::Storage::LvmThinPlugin for details.
 357 sub parse_volname {
 358     my ($cfg, $volid) = @_;
 359
 360     my ($storeid, $volname) = parse_volume_id($volid);
 361
 362     my $scfg = storage_config($cfg, $storeid);
 363
 364     my $plugin = PVE::Storage::Plugin->lookup($scfg->{type});
 365
 366     # returns ($vtype, $name, $vmid, $basename, $basevmid, $isBase, $format)
 367
 368     return $plugin->parse_volname($volname);
 369 }
 370
 371 sub parse_volume_id {
 372     my ($volid, $noerr) = @_;
 373
 374     return PVE::Storage::Plugin::parse_volume_id($volid, $noerr);
 375 }
 376
 377 # test if we have read access to volid
 378 sub check_volume_access {
 379     my ($rpcenv, $user, $cfg, $vmid, $volid) = @_;
 380
 381     my ($sid, $volname) = parse_volume_id($volid, 1);
 382     if ($sid) {
 383         my ($vtype, undef, $ownervm) = parse_volname($cfg, $volid);
 384         if ($vtype eq 'iso' || $vtype eq 'vztmpl') {
 385             # we simply allow access
 386         } elsif (defined($ownervm) && defined($vmid) && ($ownervm == $vmid)) {
 387             # we are owner - allow access
 388         } elsif ($vtype eq 'backup' && $ownervm) {
 389             $rpcenv->check($user, "/storage/$sid", ['Datastore.AllocateSpace']);
 390             $rpcenv->check($user, "/vms/$ownervm", ['VM.Backup']);
 391         } else {
 392             # allow if we are Datastore administrator
 393             $rpcenv->check($user, "/storage/$sid", ['Datastore.Allocate']);
 394         }
 395     } else {
 396         die "Only root can pass arbitrary filesystem paths."
 397             if $user ne 'root@pam';
 398     }
 399
 400     return undef;
 401 }
 402
 403 my $volume_is_base_and_used__no_lock = sub {
 404     my ($scfg, $storeid, $plugin, $volname) = @_;
 405
 406     my ($vtype, $name, $vmid, undef, undef, $isBase, undef) =
 407         $plugin->parse_volname($volname);
 408
 409     if ($isBase) {
 410         my $vollist = $plugin->list_images($storeid, $scfg);
 411         foreach my $info (@$vollist) {
 412             my (undef, $tmpvolname) = parse_volume_id($info->{volid});
 413             my $basename = undef;
 414             my $basevmid = undef;
 415
 416             eval{
 417                 (undef, undef, undef, $basename, $basevmid) =
 418                     $plugin->parse_volname($tmpvolname);
 419             };
 420
 421             if ($basename && defined($basevmid) && $basevmid == $vmid && $basename eq $name) {
 422                 return 1;
 423             }
 424         }
 425     }
 426     return 0;
 427 };
 428
 429 # NOTE: this check does not work for LVM-thin, where the clone -> base
 430 # reference is not encoded in the volume ID.
 431 # see note in PVE::Storage::LvmThinPlugin for details.
 432 sub volume_is_base_and_used {
 433     my ($cfg, $volid) = @_;
 434
 435     my ($storeid, $volname) = parse_volume_id($volid);
 436     my $scfg = storage_config($cfg, $storeid);
 437     my $plugin = PVE::Storage::Plugin->lookup($scfg->{type});
 438
 439     $plugin->cluster_lock_storage($storeid, $scfg->{shared}, undef, sub {
 440         return &$volume_is_base_and_used__no_lock($scfg, $storeid, $plugin, $volname);
 441     });
 442 }
 443
 444 # try to map a filesystem path to a volume identifier
 445 sub path_to_volume_id {
 446     my ($cfg, $path) = @_;
 447
 448     my $ids = $cfg->{ids};
 449
 450     my ($sid, $volname) = parse_volume_id($path, 1);
 451     if ($sid) {
 452         if (my $scfg = $ids->{$sid}) {
 453             if ($scfg->{path}) {
 454                 my $plugin = PVE::Storage::Plugin->lookup($scfg->{type});
 455                 my ($vtype, $name, $vmid) = $plugin->parse_volname($volname);
 456                 return ($vtype, $path);
 457             }
 458         }
 459         return ('');
 460     }
 461
 462     # Note: abs_path() return undef if $path doesn not exist
 463     # for example when nfs storage is not mounted
 464     $path = abs_path($path) || $path;
 465
 466     foreach my $sid (keys %$ids) {
 467         my $scfg = $ids->{$sid};
 468         next if !$scfg->{path};
 469         my $plugin = PVE::Storage::Plugin->lookup($scfg->{type});
 470         my $imagedir = $plugin->get_subdir($scfg, 'images');
 471         my $isodir = $plugin->get_subdir($scfg, 'iso');
 472         my $tmpldir = $plugin->get_subdir($scfg, 'vztmpl');
 473         my $backupdir = $plugin->get_subdir($scfg, 'backup');
 474         my $privatedir = $plugin->get_subdir($scfg, 'rootdir');
 475
 476         if ($path =~ m!^$imagedir/(\d+)/([^/\s]+)$!) {
 477             my $vmid = $1;
 478             my $name = $2;
 479
 480             my $vollist = $plugin->list_images($sid, $scfg, $vmid);
 481             foreach my $info (@$vollist) {
 482                 my ($storeid, $volname) = parse_volume_id($info->{volid});
 483                 my $volpath = $plugin->path($scfg, $volname, $storeid);
 484                 if ($volpath eq $path) {
 485                     return ('images', $info->{volid});
 486                 }
 487             }
 488         } elsif ($path =~ m!^$isodir/([^/]+\.[Ii][Ss][Oo])$!) {
 489             my $name = $1;
 490             return ('iso', "$sid:iso/$name");
 491         } elsif ($path =~ m!^$tmpldir/([^/]+\.tar\.gz)$!) {
 492             my $name = $1;
 493             return ('vztmpl', "$sid:vztmpl/$name");
 494         } elsif ($path =~ m!^$privatedir/(\d+)$!) {
 495             my $vmid = $1;
 496             return ('rootdir', "$sid:rootdir/$vmid");
 497         } elsif ($path =~ m!^$backupdir/([^/]+\.(tar|tar\.gz|tar\.lzo|tgz|vma|vma\.gz|vma\.lzo))$!) {
 498             my $name = $1;
 499             return ('iso', "$sid:backup/$name");
 500         }
 501     }
 502
 503     # can't map path to volume id
 504     return ('');
 505 }
 506
 507 sub path {
 508     my ($cfg, $volid, $snapname) = @_;
 509
 510     my ($storeid, $volname) = parse_volume_id($volid);
 511
 512     my $scfg = storage_config($cfg, $storeid);
 513
 514     my $plugin = PVE::Storage::Plugin->lookup($scfg->{type});
 515     my ($path, $owner, $vtype) = $plugin->path($scfg, $volname, $storeid, $snapname);
 516     return wantarray ? ($path, $owner, $vtype) : $path;
 517 }
 518
 519 sub abs_filesystem_path {
 520     my ($cfg, $volid) = @_;
 521
 522     my $path;
 523     if (PVE::Storage::parse_volume_id ($volid, 1)) {
 524         PVE::Storage::activate_volumes($cfg, [ $volid ]);
 525         $path = PVE::Storage::path($cfg, $volid);
 526     } else {
 527         if (-f $volid) {
 528             my $abspath = abs_path($volid);
 529             if ($abspath && $abspath =~ m|^(/.+)$|) {
 530                 $path = $1; # untaint any path
 531             }
 532         }
 533     }
 534
 535     die "can't find file '$volid'\n" if !($path && -f $path);
 536
 537     return $path;
 538 }
 539
 540 sub storage_migrate {
 541     my ($cfg, $volid, $target_sshinfo, $target_storeid, $target_volname, $base_snapshot, $snapshot, $ratelimit_bps, $insecure, $with_snapshots, $logfunc) = @_;
 542
 543     my ($storeid, $volname) = parse_volume_id($volid);
 544     $target_volname = $volname if !$target_volname;
 545
 546     my $scfg = storage_config($cfg, $storeid);
 547
 548     # no need to migrate shared content
 549     return if $storeid eq $target_storeid && $scfg->{shared};
 550
 551     my $tcfg = storage_config($cfg, $target_storeid);
 552
 553     my $target_volid = "${target_storeid}:${target_volname}";
 554
 555     my $target_ip = $target_sshinfo->{ip};
 556     my $errstr = "unable to migrate '$volid' to '${target_volid}' on host '$target_sshinfo->{name}'";
 557
 558     my $ssh = PVE::Cluster::ssh_info_to_command($target_sshinfo);
 559     my $ssh_base = PVE::Cluster::ssh_info_to_command_base($target_sshinfo);
 560     local $ENV{RSYNC_RSH} = PVE::Tools::cmd2string($ssh_base);
 561
 562     my @cstream = ([ '/usr/bin/cstream', '-t', $ratelimit_bps ])
 563         if defined($ratelimit_bps);
 564
 565     my $migration_snapshot;
 566     if (!defined($snapshot)) {
 567         if ($scfg->{type} eq 'zfspool') {
 568             $migration_snapshot = 1;
 569             $snapshot = '__migration__';
 570         }
 571     }
 572
 573     my @formats = volume_transfer_formats($cfg, $volid, $volid, $snapshot, $base_snapshot, $with_snapshots);
 574     die "cannot migrate from storage type '$scfg->{type}' to '$tcfg->{type}'\n" if !@formats;
 575     my $format = $formats[0];
 576
 577     my @insecurecmd;
 578     if ($insecure) {
 579         @insecurecmd = ('pvecm', 'mtunnel', '-run-command', 1);
 580         if (my $network = $target_sshinfo->{network}) {
 581             push @insecurecmd, '-migration_network', $network;
 582         }
 583     }
 584
 585     $with_snapshots = $with_snapshots ? 1 : 0; # sanitize for passing as cli parameter
 586     my $send = ['pvesm', 'export', $volid, $format, '-', '-with-snapshots', $with_snapshots];
 587     my $recv = [@$ssh, @insecurecmd, '--', 'pvesm', 'import', $volid, $format, '-', '-with-snapshots', $with_snapshots];
 588     if (defined($snapshot)) {
 589         push @$send, '-snapshot', $snapshot
 590     }
 591     if ($migration_snapshot) {
 592         push @$recv, '-delete-snapshot', $snapshot;
 593     }
 594
 595     if (defined($base_snapshot)) {
 596         # Check if the snapshot exists on the remote side:
 597         push @$send, '-base', $base_snapshot;
 598         push @$recv, '-base', $base_snapshot;
 599     }
 600
 601     volume_snapshot($cfg, $volid, $snapshot) if $migration_snapshot;
 602     eval {
 603         if ($insecure) {
 604             open(my $info, '-|', @$recv)
 605                 or die "receive command failed: $!\n";
 606             my ($ip) = <$info> =~ /^($PVE::Tools::IPRE)$/ or die "no tunnel IP received\n";
 607             my ($port) = <$info> =~ /^(\d+)$/ or die "no tunnel port received\n";
 608             my $socket = IO::Socket::IP->new(PeerHost => $ip, PeerPort => $port, Type => SOCK_STREAM)
 609                 or die "failed to connect to tunnel at $ip:$port\n";
 610             # we won't be reading from the socket
 611             shutdown($socket, 0);
 612             run_command([$send, @cstream], output => '>&'.fileno($socket));
 613             # don't close the connection entirely otherwise the receiving end
 614             # might not get all buffered data (and fails with 'connection reset by peer')
 615             shutdown($socket, 1);
 616             1 while <$info>; # wait for the remote process to finish
 617             # now close the socket
 618             close($socket);
 619             if (!close($info)) { # does waitpid()
 620                 die "import failed: $!\n" if $!;
 621                 die "import failed: exit code ".($?>>8)."\n";
 622             }
 623         } else {
 624             run_command([$send, @cstream, $recv], logfunc => $logfunc);
 625         }
 626     };
 627     my $err = $@;
 628     warn "send/receive failed, cleaning up snapshot(s)..\n" if $err;
 629     if ($migration_snapshot) {
 630         eval { volume_snapshot_delete($cfg, $volid, $snapshot, 0) };
 631         warn "could not remove source snapshot: $@\n" if $@;
 632     }
 633     die $err if $err;
 634 }
 635
 636 sub vdisk_clone {
 637     my ($cfg, $volid, $vmid, $snap) = @_;
 638
 639     my ($storeid, $volname) = parse_volume_id($volid);
 640
 641     my $scfg = storage_config($cfg, $storeid);
 642
 643     my $plugin = PVE::Storage::Plugin->lookup($scfg->{type});
 644
 645     activate_storage($cfg, $storeid);
 646
 647     # lock shared storage
 648     return $plugin->cluster_lock_storage($storeid, $scfg->{shared}, undef, sub {
 649         my $volname = $plugin->clone_image($scfg, $storeid, $volname, $vmid, $snap);
 650         return "$storeid:$volname";
 651     });
 652 }
 653
 654 sub vdisk_create_base {
 655     my ($cfg, $volid) = @_;
 656
 657     my ($storeid, $volname) = parse_volume_id($volid);
 658
 659     my $scfg = storage_config($cfg, $storeid);
 660
 661     my $plugin = PVE::Storage::Plugin->lookup($scfg->{type});
 662
 663     activate_storage($cfg, $storeid);
 664
 665     # lock shared storage
 666     return $plugin->cluster_lock_storage($storeid, $scfg->{shared}, undef, sub {
 667         my $volname = $plugin->create_base($storeid, $scfg, $volname);
 668         return "$storeid:$volname";
 669     });
 670 }
 671
 672 sub vdisk_alloc {
 673     my ($cfg, $storeid, $vmid, $fmt, $name, $size) = @_;
 674
 675     die "no storage ID specified\n" if !$storeid;
 676
 677     PVE::JSONSchema::parse_storage_id($storeid);
 678
 679     my $scfg = storage_config($cfg, $storeid);
 680
 681     die "no VMID specified\n" if !$vmid;
 682
 683     $vmid = parse_vmid($vmid);
 684
 685     my $defformat = PVE::Storage::Plugin::default_format($scfg);
 686
 687     $fmt = $defformat if !$fmt;
 688
 689     activate_storage($cfg, $storeid);
 690
 691     my $plugin = PVE::Storage::Plugin->lookup($scfg->{type});
 692
 693     # lock shared storage
 694     return $plugin->cluster_lock_storage($storeid, $scfg->{shared}, undef, sub {
 695         my $old_umask = umask(umask|0037);
 696         my $volname = eval { $plugin->alloc_image($storeid, $scfg, $vmid, $fmt, $name, $size) };
 697         my $err = $@;
 698         umask $old_umask;
 699         die $err if $err;
 700         return "$storeid:$volname";
 701     });
 702 }
 703
 704 sub vdisk_free {
 705     my ($cfg, $volid) = @_;
 706
 707     my ($storeid, $volname) = parse_volume_id($volid);
 708     my $scfg = storage_config($cfg, $storeid);
 709     my $plugin = PVE::Storage::Plugin->lookup($scfg->{type});
 710
 711     activate_storage($cfg, $storeid);
 712
 713     my $cleanup_worker;
 714
 715     # lock shared storage
 716     $plugin->cluster_lock_storage($storeid, $scfg->{shared}, undef, sub {
 717         # LVM-thin allows deletion of still referenced base volumes!
 718         die "base volume '$volname' is still in use by linked clones\n"
 719             if &$volume_is_base_and_used__no_lock($scfg, $storeid, $plugin, $volname);
 720
 721         my (undef, undef, undef, undef, undef, $isBase, $format) =
 722             $plugin->parse_volname($volname);
 723         $cleanup_worker = $plugin->free_image($storeid, $scfg, $volname, $isBase, $format);
 724     });
 725
 726     return if !$cleanup_worker;
 727
 728     my $rpcenv = PVE::RPCEnvironment::get();
 729     my $authuser = $rpcenv->get_user();
 730
 731     $rpcenv->fork_worker('imgdel', undef, $authuser, $cleanup_worker);
 732 }
 733
 734 #list iso or openvz template ($tt = <iso|vztmpl|backup>)
 735 sub template_list {
 736     my ($cfg, $storeid, $tt) = @_;
 737
 738     die "unknown template type '$tt'\n"
 739         if !($tt eq 'iso' || $tt eq 'vztmpl' || $tt eq 'backup');
 740
 741     my $ids = $cfg->{ids};
 742
 743     storage_check_enabled($cfg, $storeid) if ($storeid);
 744
 745     my $res = {};
 746
 747     # query the storage
 748
 749     foreach my $sid (keys %$ids) {
 750         next if $storeid && $storeid ne $sid;
 751
 752         my $scfg = $ids->{$sid};
 753         my $type = $scfg->{type};
 754
 755         next if !storage_check_enabled($cfg, $sid, undef, 1);
 756
 757         next if $tt eq 'iso' && !$scfg->{content}->{iso};
 758         next if $tt eq 'vztmpl' && !$scfg->{content}->{vztmpl};
 759         next if $tt eq 'backup' && !$scfg->{content}->{backup};
 760
 761         activate_storage($cfg, $sid);
 762
 763         if ($scfg->{path}) {
 764             my $plugin = PVE::Storage::Plugin->lookup($scfg->{type});
 765
 766             my $path = $plugin->get_subdir($scfg, $tt);
 767
 768             foreach my $fn (<$path/*>) {
 769
 770                 my $info;
 771
 772                 if ($tt eq 'iso') {
 773                     next if $fn !~ m!/([^/]+\.[Ii][Ss][Oo])$!;
 774
 775                     $info = { volid => "$sid:iso/$1", format => 'iso' };
 776
 777                 } elsif ($tt eq 'vztmpl') {
 778                     next if $fn !~ m!/([^/]+\.tar\.([gx]z))$!;
 779
 780                     $info = { volid => "$sid:vztmpl/$1", format => "t$2" };
 781
 782                 } elsif ($tt eq 'backup') {
 783                     next if $fn !~ m!/([^/]+\.(tar|tar\.gz|tar\.lzo|tgz|vma|vma\.gz|vma\.lzo))$!;
 784
 785                     $info = { volid => "$sid:backup/$1", format => $2 };
 786                 }
 787
 788                 $info->{size} = -s $fn;
 789
 790                 push @{$res->{$sid}}, $info;
 791             }
 792
 793         }
 794
 795         @{$res->{$sid}} = sort {lc($a->{volid}) cmp lc ($b->{volid}) } @{$res->{$sid}} if $res->{$sid};
 796     }
 797
 798     return $res;
 799 }
 800
 801
 802 sub vdisk_list {
 803     my ($cfg, $storeid, $vmid, $vollist) = @_;
 804
 805     my $ids = $cfg->{ids};
 806
 807     storage_check_enabled($cfg, $storeid) if ($storeid);
 808
 809     my $res = {};
 810
 811     # prepare/activate/refresh all storages
 812
 813     my $storage_list = [];
 814     if ($vollist) {
 815         foreach my $volid (@$vollist) {
 816             my ($sid, undef) = parse_volume_id($volid);
 817             next if !defined($ids->{$sid});
 818             next if !storage_check_enabled($cfg, $sid, undef, 1);
 819             push @$storage_list, $sid;
 820         }
 821     } else {
 822         foreach my $sid (keys %$ids) {
 823             next if $storeid && $storeid ne $sid;
 824             next if !storage_check_enabled($cfg, $sid, undef, 1);
 825             push @$storage_list, $sid;
 826         }
 827     }
 828
 829     my $cache = {};
 830
 831     activate_storage_list($cfg, $storage_list, $cache);
 832
 833     foreach my $sid (keys %$ids) {
 834         next if $storeid && $storeid ne $sid;
 835         next if !storage_check_enabled($cfg, $sid, undef, 1);
 836
 837         my $scfg = $ids->{$sid};
 838         my $plugin = PVE::Storage::Plugin->lookup($scfg->{type});
 839         $res->{$sid} = $plugin->list_images($sid, $scfg, $vmid, $vollist, $cache);
 840         @{$res->{$sid}} = sort {lc($a->{volid}) cmp lc ($b->{volid}) } @{$res->{$sid}} if $res->{$sid};
 841     }
 842
 843     return $res;
 844 }
 845
 846 sub volume_list {
 847     my ($cfg, $storeid, $vmid, $content) = @_;
 848
 849     my @ctypes = qw(images vztmpl iso backup);
 850
 851     my $cts = $content ? [ $content ] : [ @ctypes ];
 852
 853     my $scfg = PVE::Storage::storage_config($cfg, $storeid);
 854
 855     my $res = [];
 856     foreach my $ct (@$cts) {
 857         my $data;
 858         if ($ct eq 'images') {
 859             $data = vdisk_list($cfg, $storeid, $vmid);
 860         } elsif ($ct eq 'iso' && !defined($vmid)) {
 861             $data = template_list($cfg, $storeid, 'iso');
 862         } elsif ($ct eq 'vztmpl'&& !defined($vmid)) {
 863             $data = template_list ($cfg, $storeid, 'vztmpl');
 864         } elsif ($ct eq 'backup') {
 865             $data = template_list ($cfg, $storeid, 'backup');
 866             foreach my $item (@{$data->{$storeid}}) {
 867                 if (defined($vmid)) {
 868                     @{$data->{$storeid}} = grep { $_->{volid} =~ m/\S+-$vmid-\S+/ } @{$data->{$storeid}};
 869                 }
 870             }
 871         }
 872
 873         next if !$data || !$data->{$storeid};
 874
 875         foreach my $item (@{$data->{$storeid}}) {
 876             $item->{content} = $ct;
 877             push @$res, $item;
 878         }
 879     }
 880
 881     return $res;
 882 }
 883
 884 sub uevent_seqnum {
 885
 886     my $filename = "/sys/kernel/uevent_seqnum";
 887
 888     my $seqnum = 0;
 889     if (my $fh = IO::File->new($filename, "r")) {
 890         my $line = <$fh>;
 891         if ($line =~ m/^(\d+)$/) {
 892             $seqnum = int($1);
 893         }
 894         close ($fh);
 895     }
 896     return $seqnum;
 897 }
 898
 899 sub activate_storage {
 900     my ($cfg, $storeid, $cache) = @_;
 901
 902     $cache = {} if !$cache;
 903
 904     my $scfg = storage_check_enabled($cfg, $storeid);
 905
 906     return if $cache->{activated}->{$storeid};
 907
 908     $cache->{uevent_seqnum} = uevent_seqnum() if !$cache->{uevent_seqnum};
 909
 910     my $plugin = PVE::Storage::Plugin->lookup($scfg->{type});
 911
 912     if ($scfg->{base}) {
 913         my ($baseid, undef) = parse_volume_id ($scfg->{base});
 914         activate_storage($cfg, $baseid, $cache);
 915     }
 916
 917     if (!$plugin->check_connection($storeid, $scfg)) {
 918         die "storage '$storeid' is not online\n";
 919     }
 920
 921     $plugin->activate_storage($storeid, $scfg, $cache);
 922
 923     my $newseq = uevent_seqnum ();
 924
 925     # only call udevsettle if there are events
 926     if ($newseq > $cache->{uevent_seqnum}) {
 927         my $timeout = 30;
 928         system ("$UDEVADM settle --timeout=$timeout"); # ignore errors
 929         $cache->{uevent_seqnum} = $newseq;
 930     }
 931
 932     $cache->{activated}->{$storeid} = 1;
 933 }
 934
 935 sub activate_storage_list {
 936     my ($cfg, $storeid_list, $cache) = @_;
 937
 938     $cache = {} if !$cache;
 939
 940     foreach my $storeid (@$storeid_list) {
 941         activate_storage($cfg, $storeid, $cache);
 942     }
 943 }
 944
 945 sub deactivate_storage {
 946     my ($cfg, $storeid) = @_;
 947
 948     my $scfg = storage_config ($cfg, $storeid);
 949     my $plugin = PVE::Storage::Plugin->lookup($scfg->{type});
 950
 951     my $cache = {};
 952     $plugin->deactivate_storage($storeid, $scfg, $cache);
 953 }
 954
 955 sub activate_volumes {
 956     my ($cfg, $vollist, $snapname) = @_;
 957
 958     return if !($vollist && scalar(@$vollist));
 959
 960     my $storagehash = {};
 961     foreach my $volid (@$vollist) {
 962         my ($storeid, undef) = parse_volume_id($volid);
 963         $storagehash->{$storeid} = 1;
 964     }
 965
 966     my $cache = {};
 967
 968     activate_storage_list($cfg, [keys %$storagehash], $cache);
 969
 970     foreach my $volid (@$vollist) {
 971         my ($storeid, $volname) = parse_volume_id($volid);
 972         my $scfg = storage_config($cfg, $storeid);
 973         my $plugin = PVE::Storage::Plugin->lookup($scfg->{type});
 974         $plugin->activate_volume($storeid, $scfg, $volname, $snapname, $cache);
 975     }
 976 }
 977
 978 sub deactivate_volumes {
 979     my ($cfg, $vollist, $snapname) = @_;
 980
 981     return if !($vollist && scalar(@$vollist));
 982
 983     my $cache = {};
 984
 985     my @errlist = ();
 986     foreach my $volid (@$vollist) {
 987         my ($storeid, $volname) = parse_volume_id($volid);
 988
 989         my $scfg = storage_config($cfg, $storeid);
 990         my $plugin = PVE::Storage::Plugin->lookup($scfg->{type});
 991
 992         eval {
 993             $plugin->deactivate_volume($storeid, $scfg, $volname, $snapname, $cache);
 994         };
 995         if (my $err = $@) {
 996             warn $err;
 997             push @errlist, $volid;
 998         }
 999     }
1000
1001     die "volume deactivation failed: " . join(' ', @errlist)
1002         if scalar(@errlist);
1003 }
1004
1005 sub storage_info {
1006     my ($cfg, $content, $includeformat) = @_;
1007
1008     my $ids = $cfg->{ids};
1009
1010     my $info = {};
1011
1012     my @ctypes = PVE::Tools::split_list($content);
1013
1014     my $slist = [];
1015     foreach my $storeid (keys %$ids) {
1016         my $storage_enabled = defined(storage_check_enabled($cfg, $storeid, undef, 1));
1017
1018         if (defined($content)) {
1019             my $want_ctype = 0;
1020             foreach my $ctype (@ctypes) {
1021                 if ($ids->{$storeid}->{content}->{$ctype}) {
1022                     $want_ctype = 1;
1023                     last;
1024                 }
1025             }
1026             next if !$want_ctype || !$storage_enabled;
1027         }
1028
1029         my $type = $ids->{$storeid}->{type};
1030
1031         $info->{$storeid} = {
1032             type => $type,
1033             total => 0,
1034             avail => 0,
1035             used => 0,
1036             shared => $ids->{$storeid}->{shared} ? 1 : 0,
1037             content => PVE::Storage::Plugin::content_hash_to_string($ids->{$storeid}->{content}),
1038             active => 0,
1039             enabled => $storage_enabled ? 1 : 0,
1040         };
1041
1042         push @$slist, $storeid;
1043     }
1044
1045     my $cache = {};
1046
1047     foreach my $storeid (keys %$ids) {
1048         my $scfg = $ids->{$storeid};
1049
1050         next if !$info->{$storeid};
1051         next if !$info->{$storeid}->{enabled};
1052
1053         my $plugin = PVE::Storage::Plugin->lookup($scfg->{type});
1054         if ($includeformat) {
1055             my $pd = $plugin->plugindata();
1056             $info->{$storeid}->{format} = $pd->{format}
1057                 if $pd->{format};
1058             $info->{$storeid}->{select_existing} = $pd->{select_existing}
1059                 if $pd->{select_existing};
1060         }
1061
1062         eval { activate_storage($cfg, $storeid, $cache); };
1063         if (my $err = $@) {
1064             warn $err;
1065             next;
1066         }
1067
1068         my ($total, $avail, $used, $active) = eval { $plugin->status($storeid, $scfg, $cache); };
1069         warn $@ if $@;
1070         next if !$active;
1071         $info->{$storeid}->{total} = int($total);
1072         $info->{$storeid}->{avail} = int($avail);
1073         $info->{$storeid}->{used} = int($used);
1074         $info->{$storeid}->{active} = $active;
1075     }
1076
1077     return $info;
1078 }
1079
1080 sub resolv_server {
1081     my ($server) = @_;
1082
1083     my ($packed_ip, $family);
1084     eval {
1085         my @res = PVE::Tools::getaddrinfo_all($server);
1086         $family = $res[0]->{family};
1087         $packed_ip = (PVE::Tools::unpack_sockaddr_in46($res[0]->{addr}))[2];
1088     };
1089     if (defined $packed_ip) {
1090         return Socket::inet_ntop($family, $packed_ip);
1091     }
1092     return undef;
1093 }
1094
1095 sub scan_nfs {
1096     my ($server_in) = @_;
1097
1098     my $server;
1099     if (!($server = resolv_server ($server_in))) {
1100         die "unable to resolve address for server '${server_in}'\n";
1101     }
1102
1103     my $cmd = ['/sbin/showmount',  '--no-headers', '--exports', $server];
1104
1105     my $res = {};
1106     run_command($cmd, outfunc => sub {
1107         my $line = shift;
1108
1109         # note: howto handle white spaces in export path??
1110         if ($line =~ m!^(/\S+)\s+(.+)$!) {
1111             $res->{$1} = $2;
1112         }
1113     });
1114
1115     return $res;
1116 }
1117
1118 sub scan_cifs {
1119     my ($server_in, $user, $password, $domain) = @_;
1120
1121     my $server;
1122     if (!($server = resolv_server ($server_in))) {
1123         die "unable to resolve address for server '${server_in}'\n";
1124     }
1125
1126     # we support only Windows grater than 2012 cifsscan so use smb3
1127     my $cmd = ['/usr/bin/smbclient', '-m', 'smb3', '-d', '0', '-L', $server];
1128     if (defined($user)) {
1129         die "password is required" if !defined($password);
1130         push @$cmd, '-U', "$user\%$password";
1131         push @$cmd, '-W', $domain if defined($domain);
1132     } else {
1133         push @$cmd, '-N';
1134     }
1135
1136     my $res = {};
1137     run_command($cmd,
1138                 outfunc => sub {
1139                     my $line = shift;
1140                     if ($line =~ m/(\S+)\s*Disk\s*(\S*)/) {
1141                         $res->{$1} = $2;
1142                     } elsif ($line =~ m/(NT_STATUS_(\S*))/) {
1143                         $res->{$1} = '';
1144                     }
1145                 },
1146                 errfunc => sub {},
1147                 noerr => 1
1148     );
1149
1150     return $res;
1151 }
1152
1153 sub scan_zfs {
1154
1155     my $cmd = ['zfs',  'list', '-t', 'filesystem', '-H', '-o', 'name,avail,used'];
1156
1157     my $res = [];
1158     run_command($cmd, outfunc => sub {
1159         my $line = shift;
1160
1161         if ($line =~m/^(\S+)\s+(\S+)\s+(\S+)$/) {
1162             my ($pool, $size_str, $used_str) = ($1, $2, $3);
1163             my $size = PVE::Storage::ZFSPoolPlugin::zfs_parse_size($size_str);
1164             my $used = PVE::Storage::ZFSPoolPlugin::zfs_parse_size($used_str);
1165             # ignore subvolumes generated by our ZFSPoolPlugin
1166             return if $pool =~ m!/subvol-\d+-[^/]+$!;
1167             return if $pool =~ m!/basevol-\d+-[^/]+$!;
1168             push @$res, { pool => $pool, size => $size, free => $size-$used };
1169         }
1170     });
1171
1172     return $res;
1173 }
1174
1175 sub resolv_portal {
1176     my ($portal, $noerr) = @_;
1177
1178     my ($server, $port) = PVE::Tools::parse_host_and_port($portal);
1179     if ($server) {
1180         if (my $ip = resolv_server($server)) {
1181             $server = $ip;
1182             $server = "[$server]" if $server =~ /^$IPV6RE$/;
1183             return $port ? "$server:$port" : $server;
1184         }
1185     }
1186     return undef if $noerr;
1187
1188     raise_param_exc({ portal => "unable to resolve portal address '$portal'" });
1189 }
1190
1191 # idea is from usbutils package (/usr/bin/usb-devices) script
1192 sub __scan_usb_device {
1193     my ($res, $devpath, $parent, $level) = @_;
1194
1195     return if ! -d $devpath;
1196     return if $level && $devpath !~ m/^.*[-.](\d+)$/;
1197     my $port = $level ? int($1 - 1) : 0;
1198
1199     my $busnum = int(file_read_firstline("$devpath/busnum"));
1200     my $devnum = int(file_read_firstline("$devpath/devnum"));
1201
1202     my $d = {
1203         port => $port,
1204         level => $level,
1205         busnum => $busnum,
1206         devnum => $devnum,
1207         speed => file_read_firstline("$devpath/speed"),
1208         class => hex(file_read_firstline("$devpath/bDeviceClass")),
1209         vendid => file_read_firstline("$devpath/idVendor"),
1210         prodid => file_read_firstline("$devpath/idProduct"),
1211     };
1212
1213     if ($level) {
1214         my $usbpath = $devpath;
1215         $usbpath =~ s|^.*/\d+\-||;
1216         $d->{usbpath} = $usbpath;
1217     }
1218
1219     my $product = file_read_firstline("$devpath/product");
1220     $d->{product} = $product if $product;
1221
1222     my $manu = file_read_firstline("$devpath/manufacturer");
1223     $d->{manufacturer} = $manu if $manu;
1224
1225     my $serial => file_read_firstline("$devpath/serial");
1226     $d->{serial} = $serial if $serial;
1227
1228     push @$res, $d;
1229
1230     foreach my $subdev (<$devpath/$busnum-*>) {
1231         next if $subdev !~ m|/$busnum-[0-9]+(\.[0-9]+)*$|;
1232         __scan_usb_device($res, $subdev, $devnum, $level + 1);
1233     }
1234
1235 };
1236
1237 sub scan_usb {
1238
1239     my $devlist = [];
1240
1241     foreach my $device (</sys/bus/usb/devices/usb*>) {
1242         __scan_usb_device($devlist, $device, 0, 0);
1243     }
1244
1245     return $devlist;
1246 }
1247
1248 sub scan_iscsi {
1249     my ($portal_in) = @_;
1250
1251     my $portal;
1252     if (!($portal = resolv_portal($portal_in))) {
1253         die "unable to parse/resolve portal address '${portal_in}'\n";
1254     }
1255
1256     return PVE::Storage::ISCSIPlugin::iscsi_discovery($portal);
1257 }
1258
1259 sub storage_default_format {
1260     my ($cfg, $storeid) = @_;
1261
1262     my $scfg = storage_config ($cfg, $storeid);
1263
1264     return PVE::Storage::Plugin::default_format($scfg);
1265 }
1266
1267 sub vgroup_is_used {
1268     my ($cfg, $vgname) = @_;
1269
1270     foreach my $storeid (keys %{$cfg->{ids}}) {
1271         my $scfg = storage_config($cfg, $storeid);
1272         if ($scfg->{type} eq 'lvm' && $scfg->{vgname} eq $vgname) {
1273             return 1;
1274         }
1275     }
1276
1277     return undef;
1278 }
1279
1280 sub target_is_used {
1281     my ($cfg, $target) = @_;
1282
1283     foreach my $storeid (keys %{$cfg->{ids}}) {
1284         my $scfg = storage_config($cfg, $storeid);
1285         if ($scfg->{type} eq 'iscsi' && $scfg->{target} eq $target) {
1286             return 1;
1287         }
1288     }
1289
1290     return undef;
1291 }
1292
1293 sub volume_is_used {
1294     my ($cfg, $volid) = @_;
1295
1296     foreach my $storeid (keys %{$cfg->{ids}}) {
1297         my $scfg = storage_config($cfg, $storeid);
1298         if ($scfg->{base} && $scfg->{base} eq $volid) {
1299             return 1;
1300         }
1301     }
1302
1303     return undef;
1304 }
1305
1306 sub storage_is_used {
1307     my ($cfg, $storeid) = @_;
1308
1309     foreach my $sid (keys %{$cfg->{ids}}) {
1310         my $scfg = storage_config($cfg, $sid);
1311         next if !$scfg->{base};
1312         my ($st) = parse_volume_id($scfg->{base});
1313         return 1 if $st && $st eq $storeid;
1314     }
1315
1316     return undef;
1317 }
1318
1319 sub foreach_volid {
1320     my ($list, $func) = @_;
1321
1322     return if !$list;
1323
1324     foreach my $sid (keys %$list) {
1325        foreach my $info (@{$list->{$sid}}) {
1326            my $volid = $info->{volid};
1327            my ($sid1, $volname) = parse_volume_id($volid, 1);
1328            if ($sid1 && $sid1 eq $sid) {
1329                &$func ($volid, $sid, $info);
1330            } else {
1331                warn "detected strange volid '$volid' in volume list for '$sid'\n";
1332            }
1333        }
1334     }
1335 }
1336
1337 sub extract_vzdump_config_tar {
1338     my ($archive, $conf_re) = @_;
1339
1340     die "ERROR: file '$archive' does not exist\n" if ! -f $archive;
1341
1342     my $pid = open(my $fh, '-|', 'tar', 'tf', $archive) ||
1343        die "unable to open file '$archive'\n";
1344
1345     my $file;
1346     while (defined($file = <$fh>)) {
1347         if ($file =~ $conf_re) {
1348             $file = $1; # untaint
1349             last;
1350         }
1351     }
1352
1353     kill 15, $pid;
1354     waitpid $pid, 0;
1355     close $fh;
1356
1357     die "ERROR: archive contains no configuration file\n" if !$file;
1358     chomp $file;
1359
1360     my $raw = '';
1361     my $out = sub {
1362         my $output = shift;
1363         $raw .= "$output\n";
1364     };
1365
1366     PVE::Tools::run_command(['tar', '-xpOf', $archive, $file, '--occurrence'], outfunc => $out);
1367
1368     return wantarray ? ($raw, $file) : $raw;
1369 }
1370
1371 sub extract_vzdump_config_vma {
1372     my ($archive, $comp) = @_;
1373
1374     my $cmd;
1375     my $raw = '';
1376     my $out = sub {
1377         my $output = shift;
1378         $raw .= "$output\n";
1379     };
1380
1381
1382     if ($comp) {
1383         my $uncomp;
1384         if ($comp eq 'gz') {
1385             $uncomp = ["zcat", $archive];
1386         } elsif ($comp eq 'lzo') {
1387             $uncomp = ["lzop", "-d", "-c", $archive];
1388         } else {
1389             die "unknown compression method '$comp'\n";
1390         }
1391         $cmd = [$uncomp, ["vma", "config", "-"]];
1392
1393         # in some cases, lzop/zcat exits with 1 when its stdout pipe is
1394         # closed early by vma, detect this and ignore the exit code later
1395         my $broken_pipe;
1396         my $errstring;
1397         my $err = sub {
1398             my $output = shift;
1399             if ($output =~ m/lzop: Broken pipe: <stdout>/ || $output =~ m/gzip: stdout: Broken pipe/) {
1400                 $broken_pipe = 1;
1401             } elsif (!defined ($errstring) && $output !~ m/^\s*$/) {
1402                 $errstring = "Failed to extract config from VMA archive: $output\n";
1403             }
1404         };
1405
1406         # in other cases, the pipeline will exit with exit code 141
1407         # because of the broken pipe, handle / ignore this as well
1408         my $rc;
1409         eval {
1410             $rc = PVE::Tools::run_command($cmd, outfunc => $out, errfunc => $err, noerr => 1);
1411         };
1412         my $rerr = $@;
1413
1414         # use exit code if no stderr output and not just broken pipe
1415         if (!$errstring && !$broken_pipe && $rc != 0 && $rc != 141) {
1416             die "$rerr\n" if $rerr;
1417             die "config extraction failed with exit code $rc\n";
1418         }
1419         die "$errstring\n" if $errstring;
1420     } else {
1421         # simple case without compression and weird piping behaviour
1422         PVE::Tools::run_command(["vma", "config", $archive], outfunc => $out);
1423     }
1424
1425     return wantarray ? ($raw, undef) : $raw;
1426 }
1427
1428 sub extract_vzdump_config {
1429     my ($cfg, $volid) = @_;
1430
1431     my $archive = abs_filesystem_path($cfg, $volid);
1432
1433     if ($volid =~ /vzdump-(lxc|openvz)-\d+-(\d{4})_(\d{2})_(\d{2})-(\d{2})_(\d{2})_(\d{2})\.(tgz|(tar(\.(gz|lzo))?))$/) {
1434         return extract_vzdump_config_tar($archive, qr!^(\./etc/vzdump/(pct|vps)\.conf)$!);
1435     } elsif ($volid =~ /vzdump-qemu-\d+-(\d{4})_(\d{2})_(\d{2})-(\d{2})_(\d{2})_(\d{2})\.(tgz|((tar|vma)(\.(gz|lzo))?))$/) {
1436         my $format;
1437         my $comp;
1438         if ($7 eq 'tgz') {
1439             $format = 'tar';
1440             $comp = 'gz';
1441         } else {
1442             $format = $9;
1443             $comp = $11 if defined($11);
1444         }
1445
1446         if ($format eq 'tar') {
1447             return extract_vzdump_config_tar($archive, qr!\(\./qemu-server\.conf\)!);
1448         } else {
1449             return extract_vzdump_config_vma($archive, $comp);
1450         }
1451     } else {
1452         die "cannot determine backup guest type for backup archive '$volid'\n";
1453     }
1454 }
1455
1456 sub volume_export {
1457     my ($cfg, $fh, $volid, $format, $snapshot, $base_snapshot, $with_snapshots) = @_;
1458
1459     my ($storeid, $volname) = parse_volume_id($volid, 1);
1460     die "cannot export volume '$volid'\n" if !$storeid;
1461     my $scfg = storage_config($cfg, $storeid);
1462     my $plugin = PVE::Storage::Plugin->lookup($scfg->{type});
1463     return $plugin->volume_export($scfg, $storeid, $fh, $volname, $format,
1464                                   $snapshot, $base_snapshot, $with_snapshots);
1465 }
1466
1467 sub volume_import {
1468     my ($cfg, $fh, $volid, $format, $base_snapshot, $with_snapshots) = @_;
1469
1470     my ($storeid, $volname) = parse_volume_id($volid, 1);
1471     die "cannot import into volume '$volid'\n" if !$storeid;
1472     my $scfg = storage_config($cfg, $storeid);
1473     my $plugin = PVE::Storage::Plugin->lookup($scfg->{type});
1474     return $plugin->volume_import($scfg, $storeid, $fh, $volname, $format,
1475                                   $base_snapshot, $with_snapshots);
1476 }
1477
1478 sub volume_export_formats {
1479     my ($cfg, $volid, $snapshot, $base_snapshot, $with_snapshots) = @_;
1480
1481     my ($storeid, $volname) = parse_volume_id($volid, 1);
1482     return if !$storeid;
1483     my $scfg = storage_config($cfg, $storeid);
1484     my $plugin = PVE::Storage::Plugin->lookup($scfg->{type});
1485     return $plugin->volume_export_formats($scfg, $storeid, $volname,
1486                                           $snapshot, $base_snapshot,
1487                                           $with_snapshots);
1488 }
1489
1490 sub volume_import_formats {
1491     my ($cfg, $volid, $base_snapshot, $with_snapshots) = @_;
1492
1493     my ($storeid, $volname) = parse_volume_id($volid, 1);
1494     return if !$storeid;
1495     my $scfg = storage_config($cfg, $storeid);
1496     my $plugin = PVE::Storage::Plugin->lookup($scfg->{type});
1497     return $plugin->volume_import_formats($scfg, $storeid, $volname,
1498                                           $base_snapshot, $with_snapshots);
1499 }
1500
1501 sub volume_transfer_formats {
1502     my ($cfg, $src_volid, $dst_volid, $snapshot, $base_snapshot, $with_snapshots) = @_;
1503     my @export_formats = volume_export_formats($cfg, $src_volid, $snapshot, $base_snapshot, $with_snapshots);
1504     my @import_formats = volume_import_formats($cfg, $dst_volid, $base_snapshot, $with_snapshots);
1505     my %import_hash = map { $_ => 1 } @import_formats;
1506     my @common = grep { $import_hash{$_} } @export_formats;
1507     return @common;
1508 }
1509
1510 # bash completion helper
1511
1512 sub complete_storage {
1513     my ($cmdname, $pname, $cvalue) = @_;
1514
1515     my $cfg = PVE::Storage::config();
1516
1517     return  $cmdname eq 'add' ? [] : [ PVE::Storage::storage_ids($cfg) ];
1518 }
1519
1520 sub complete_storage_enabled {
1521     my ($cmdname, $pname, $cvalue) = @_;
1522
1523     my $res = [];
1524
1525     my $cfg = PVE::Storage::config();
1526     foreach my $sid (keys %{$cfg->{ids}}) {
1527         next if !storage_check_enabled($cfg, $sid, undef, 1);
1528         push @$res, $sid;
1529     }
1530     return $res;
1531 }
1532
1533 sub complete_content_type {
1534     my ($cmdname, $pname, $cvalue) = @_;
1535
1536     return [qw(rootdir images vztmpl iso backup)];
1537 }
1538
1539 sub complete_volume {
1540     my ($cmdname, $pname, $cvalue) = @_;
1541
1542     my $cfg = config();
1543
1544     my $storage_list = complete_storage_enabled();
1545
1546     if ($cvalue =~ m/^([^:]+):/) {
1547         $storage_list = [ $1 ];
1548     } else {
1549         if (scalar(@$storage_list) > 1) {
1550             # only list storage IDs to avoid large listings
1551             my $res = [];
1552             foreach my $storeid (@$storage_list) {
1553                 # Hack: simply return 2 artificial values, so that
1554                 # completions does not finish
1555                 push @$res, "$storeid:volname", "$storeid:...";
1556             }
1557             return $res;
1558         }
1559     }
1560
1561     my $res = [];
1562     foreach my $storeid (@$storage_list) {
1563         my $vollist = PVE::Storage::volume_list($cfg, $storeid);
1564
1565         foreach my $item (@$vollist) {
1566             push @$res, $item->{volid};
1567         }
1568     }
1569
1570     return $res;
1571 }
1572
1573 # Various io-heavy operations require io/bandwidth limits which can be
1574 # configured on multiple levels: The global defaults in datacenter.cfg, and
1575 # per-storage overrides. When we want to do a restore from storage A to storage
1576 # B, we should take the smaller limit defined for storages A and B, and if no
1577 # such limit was specified, use the one from datacenter.cfg.
1578 sub get_bandwidth_limit {
1579     my ($operation, $storage_list, $override) = @_;
1580
1581     # called for each limit (global, per-storage) with the 'default' and the
1582     # $operation limit and should udpate $override for every limit affecting
1583     # us.
1584     my $use_global_limits = 0;
1585     my $apply_limit = sub {
1586         my ($bwlimit) = @_;
1587         if (defined($bwlimit)) {
1588             my $limits = PVE::JSONSchema::parse_property_string('bwlimit', $bwlimit);
1589             my $limit = $limits->{$operation} // $limits->{default};
1590             if (defined($limit)) {
1591                 if (!$override || $limit < $override) {
1592                     $override = $limit;
1593                 }
1594                 return;
1595             }
1596         }
1597         # If there was no applicable limit, try to apply the global ones.
1598         $use_global_limits = 1;
1599     };
1600
1601     my ($rpcenv, $authuser);
1602     if (defined($override)) {
1603         $rpcenv = PVE::RPCEnvironment->get();
1604         $authuser = $rpcenv->get_user();
1605     }
1606
1607     # Apply per-storage limits - if there are storages involved.
1608     if (@$storage_list) {
1609         my $config = config();
1610
1611         # The Datastore.Allocate permission allows us to modify the per-storage
1612         # limits, therefore it also allows us to override them.
1613         # Since we have most likely multiple storages to check, do a quick check on
1614         # the general '/storage' path to see if we can skip the checks entirely:
1615         return $override if $rpcenv && $rpcenv->check($authuser, '/storage', ['Datastore.Allocate'], 1);
1616
1617         my %done;
1618         foreach my $storage (@$storage_list) {
1619             # Avoid duplicate checks:
1620             next if $done{$storage};
1621             $done{$storage} = 1;
1622
1623             # Otherwise we may still have individual /storage/$ID permissions:
1624             if (!$rpcenv || !$rpcenv->check($authuser, "/storage/$storage", ['Datastore.Allocate'], 1)) {
1625                 # And if not: apply the limits.
1626                 my $storecfg = storage_config($config, $storage);
1627                 $apply_limit->($storecfg->{bwlimit});
1628             }
1629         }
1630
1631         # Storage limits take precedence over the datacenter defaults, so if
1632         # a limit was applied:
1633         return $override if !$use_global_limits;
1634     }
1635
1636     # Sys.Modify on '/' means we can change datacenter.cfg which contains the
1637     # global default limits.
1638     if (!$rpcenv || !$rpcenv->check($authuser, '/', ['Sys.Modify'], 1)) {
1639         # So if we cannot modify global limits, apply them to our currently
1640         # requested override.
1641         my $dc = cfs_read_file('datacenter.cfg');
1642         $apply_limit->($dc->{bwlimit});
1643     }
1644
1645     return $override;
1646 }
1647
1648 1;