16 use PVE
::Tools
qw(run_command file_read_firstline dir_glob_foreach $IPV6RE);
17 use PVE
::Cluster
qw(cfs_read_file cfs_write_file cfs_lock_file);
18 use PVE
::Exception
qw(raise_param_exc);
21 use PVE
::RPCEnvironment
;
23 use PVE
::Storage
::Plugin
;
24 use PVE
::Storage
::DirPlugin
;
25 use PVE
::Storage
::LVMPlugin
;
26 use PVE
::Storage
::LvmThinPlugin
;
27 use PVE
::Storage
::NFSPlugin
;
28 use PVE
::Storage
::CIFSPlugin
;
29 use PVE
::Storage
::ISCSIPlugin
;
30 use PVE
::Storage
::RBDPlugin
;
31 use PVE
::Storage
::CephFSPlugin
;
32 use PVE
::Storage
::ISCSIDirectPlugin
;
33 use PVE
::Storage
::GlusterfsPlugin
;
34 use PVE
::Storage
::ZFSPoolPlugin
;
35 use PVE
::Storage
::ZFSPlugin
;
36 use PVE
::Storage
::DRBDPlugin
;
38 # Storage API version. Icrement it on changes in storage API interface.
39 use constant APIVER
=> 3;
40 # Age is the number of versions we're backward compatible with.
41 # This is like having 'current=APIVER' and age='APIAGE' in libtool,
42 # see https://www.gnu.org/software/libtool/manual/html_node/Libtool-versioning.html
43 use constant APIAGE
=> 2;
45 # load standard plugins
46 PVE
::Storage
::DirPlugin-
>register();
47 PVE
::Storage
::LVMPlugin-
>register();
48 PVE
::Storage
::LvmThinPlugin-
>register();
49 PVE
::Storage
::NFSPlugin-
>register();
50 PVE
::Storage
::CIFSPlugin-
>register();
51 PVE
::Storage
::ISCSIPlugin-
>register();
52 PVE
::Storage
::RBDPlugin-
>register();
53 PVE
::Storage
::CephFSPlugin-
>register();
54 PVE
::Storage
::ISCSIDirectPlugin-
>register();
55 PVE
::Storage
::GlusterfsPlugin-
>register();
56 PVE
::Storage
::ZFSPoolPlugin-
>register();
57 PVE
::Storage
::ZFSPlugin-
>register();
58 PVE
::Storage
::DRBDPlugin-
>register();
60 # load third-party plugins
61 if ( -d
'/usr/share/perl5/PVE/Storage/Custom' ) {
62 dir_glob_foreach
('/usr/share/perl5/PVE/Storage/Custom', '.*\.pm$', sub {
64 my $modname = 'PVE::Storage::Custom::' . $file;
65 $modname =~ s!\.pm$!!;
66 $file = 'PVE/Storage/Custom/' . $file;
71 # Check perl interface:
72 die "not derived from PVE::Storage::Plugin\n"
73 if !$modname->isa('PVE::Storage::Plugin');
74 die "does not provide an api() method\n"
75 if !$modname->can('api');
76 # Check storage API version and that file is really storage plugin.
77 my $version = $modname->api();
78 die "implements an API version newer than current ($version > " . APIVER
. ")\n"
80 my $min_version = (APIVER
- APIAGE
);
81 die "API version too old, please update the plugin ($version < $min_version)\n"
82 if $version < $min_version;
86 # If we got this far and the API version is not the same, make some
88 warn "Plugin \"$modname\" is implementing an older storage API
, an upgrade
is recommended
\n"
89 if $version != APIVER;
92 warn "Error loading storage plugin
\"$modname\": $@";
97 # initialize all plugins
98 PVE
::Storage
::Plugin-
>init();
100 my $UDEVADM = '/sbin/udevadm';
102 my $iso_extension_re = qr/\.(?:[Ii][Ss][Oo]|[Ii][Mm][Gg])/;
104 # PVE::Storage utility functions
107 return cfs_read_file
("storage.cfg");
113 cfs_write_file
('storage.cfg', $cfg);
116 sub lock_storage_config
{
117 my ($code, $errmsg) = @_;
119 cfs_lock_file
("storage.cfg", undef, $code);
122 $errmsg ?
die "$errmsg: $err" : die $err;
127 my ($cfg, $storeid, $noerr) = @_;
129 die "no storage ID specified\n" if !$storeid;
131 my $scfg = $cfg->{ids
}->{$storeid};
133 die "storage '$storeid' does not exists\n" if (!$noerr && !$scfg);
138 sub storage_check_node
{
139 my ($cfg, $storeid, $node, $noerr) = @_;
141 my $scfg = storage_config
($cfg, $storeid);
143 if ($scfg->{nodes
}) {
144 $node = PVE
::INotify
::nodename
() if !$node || ($node eq 'localhost');
145 if (!$scfg->{nodes
}->{$node}) {
146 die "storage '$storeid' is not available on node '$node'\n" if !$noerr;
154 sub storage_check_enabled
{
155 my ($cfg, $storeid, $node, $noerr) = @_;
157 my $scfg = storage_config
($cfg, $storeid);
159 if ($scfg->{disable
}) {
160 die "storage '$storeid' is disabled\n" if !$noerr;
164 return storage_check_node
($cfg, $storeid, $node, $noerr);
167 # storage_can_replicate:
168 # return true if storage supports replication
169 # (volumes alocated with vdisk_alloc() has replication feature)
170 sub storage_can_replicate
{
171 my ($cfg, $storeid, $format) = @_;
173 my $scfg = storage_config
($cfg, $storeid);
174 my $plugin = PVE
::Storage
::Plugin-
>lookup($scfg->{type
});
175 return $plugin->storage_can_replicate($scfg, $storeid, $format);
181 return keys %{$cfg->{ids
}};
185 my ($filename, $timeout) = @_;
187 return PVE
::Storage
::Plugin
::file_size_info
($filename, $timeout);
190 sub volume_size_info
{
191 my ($cfg, $volid, $timeout) = @_;
193 my ($storeid, $volname) = parse_volume_id
($volid, 1);
195 my $scfg = storage_config
($cfg, $storeid);
196 my $plugin = PVE
::Storage
::Plugin-
>lookup($scfg->{type
});
197 return $plugin->volume_size_info($scfg, $storeid, $volname, $timeout);
198 } elsif ($volid =~ m
|^(/.+)$| && -e
$volid) {
199 return file_size_info
($volid, $timeout);
206 my ($cfg, $volid, $size, $running) = @_;
208 my ($storeid, $volname) = parse_volume_id
($volid, 1);
210 my $scfg = storage_config
($cfg, $storeid);
211 my $plugin = PVE
::Storage
::Plugin-
>lookup($scfg->{type
});
212 return $plugin->volume_resize($scfg, $storeid, $volname, $size, $running);
213 } elsif ($volid =~ m
|^(/.+)$| && -e
$volid) {
214 die "resize file/device '$volid' is not possible\n";
216 die "unable to parse volume ID '$volid'\n";
220 sub volume_rollback_is_possible
{
221 my ($cfg, $volid, $snap) = @_;
223 my ($storeid, $volname) = parse_volume_id
($volid, 1);
225 my $scfg = storage_config
($cfg, $storeid);
226 my $plugin = PVE
::Storage
::Plugin-
>lookup($scfg->{type
});
227 return $plugin->volume_rollback_is_possible($scfg, $storeid, $volname, $snap);
228 } elsif ($volid =~ m
|^(/.+)$| && -e
$volid) {
229 die "snapshot rollback file/device '$volid' is not possible\n";
231 die "unable to parse volume ID '$volid'\n";
235 sub volume_snapshot
{
236 my ($cfg, $volid, $snap) = @_;
238 my ($storeid, $volname) = parse_volume_id
($volid, 1);
240 my $scfg = storage_config
($cfg, $storeid);
241 my $plugin = PVE
::Storage
::Plugin-
>lookup($scfg->{type
});
242 return $plugin->volume_snapshot($scfg, $storeid, $volname, $snap);
243 } elsif ($volid =~ m
|^(/.+)$| && -e
$volid) {
244 die "snapshot file/device '$volid' is not possible\n";
246 die "unable to parse volume ID '$volid'\n";
250 sub volume_snapshot_rollback
{
251 my ($cfg, $volid, $snap) = @_;
253 my ($storeid, $volname) = parse_volume_id
($volid, 1);
255 my $scfg = storage_config
($cfg, $storeid);
256 my $plugin = PVE
::Storage
::Plugin-
>lookup($scfg->{type
});
257 $plugin->volume_rollback_is_possible($scfg, $storeid, $volname, $snap);
258 return $plugin->volume_snapshot_rollback($scfg, $storeid, $volname, $snap);
259 } elsif ($volid =~ m
|^(/.+)$| && -e
$volid) {
260 die "snapshot rollback file/device '$volid' is not possible\n";
262 die "unable to parse volume ID '$volid'\n";
266 sub volume_snapshot_delete
{
267 my ($cfg, $volid, $snap, $running) = @_;
269 my ($storeid, $volname) = parse_volume_id
($volid, 1);
271 my $scfg = storage_config
($cfg, $storeid);
272 my $plugin = PVE
::Storage
::Plugin-
>lookup($scfg->{type
});
273 return $plugin->volume_snapshot_delete($scfg, $storeid, $volname, $snap, $running);
274 } elsif ($volid =~ m
|^(/.+)$| && -e
$volid) {
275 die "snapshot delete file/device '$volid' is not possible\n";
277 die "unable to parse volume ID '$volid'\n";
281 sub volume_has_feature
{
282 my ($cfg, $feature, $volid, $snap, $running) = @_;
284 my ($storeid, $volname) = parse_volume_id
($volid, 1);
286 my $scfg = storage_config
($cfg, $storeid);
287 my $plugin = PVE
::Storage
::Plugin-
>lookup($scfg->{type
});
288 return $plugin->volume_has_feature($scfg, $feature, $storeid, $volname, $snap, $running);
289 } elsif ($volid =~ m
|^(/.+)$| && -e
$volid) {
296 sub volume_snapshot_list
{
297 my ($cfg, $volid) = @_;
299 my ($storeid, $volname) = parse_volume_id
($volid, 1);
301 my $scfg = storage_config
($cfg, $storeid);
302 my $plugin = PVE
::Storage
::Plugin-
>lookup($scfg->{type
});
303 return $plugin->volume_snapshot_list($scfg, $storeid, $volname);
304 } elsif ($volid =~ m
|^(/.+)$| && -e
$volid) {
305 die "send file/device '$volid' is not possible\n";
307 die "unable to parse volume ID '$volid'\n";
309 # return an empty array if dataset does not exist.
313 my ($cfg, $storeid, $vmid) = @_;
315 my $scfg = storage_config
($cfg, $storeid);
316 my $plugin = PVE
::Storage
::Plugin-
>lookup($scfg->{type
});
318 my $path = $plugin->get_subdir($scfg, 'images');
320 return $vmid ?
"$path/$vmid" : $path;
323 sub get_private_dir
{
324 my ($cfg, $storeid, $vmid) = @_;
326 my $scfg = storage_config
($cfg, $storeid);
327 my $plugin = PVE
::Storage
::Plugin-
>lookup($scfg->{type
});
329 my $path = $plugin->get_subdir($scfg, 'rootdir');
331 return $vmid ?
"$path/$vmid" : $path;
335 my ($cfg, $storeid) = @_;
337 my $scfg = storage_config
($cfg, $storeid);
338 my $plugin = PVE
::Storage
::Plugin-
>lookup($scfg->{type
});
340 return $plugin->get_subdir($scfg, 'iso');
344 my ($cfg, $storeid) = @_;
346 my $scfg = storage_config
($cfg, $storeid);
347 my $plugin = PVE
::Storage
::Plugin-
>lookup($scfg->{type
});
349 return $plugin->get_subdir($scfg, 'vztmpl');
353 my ($cfg, $storeid) = @_;
355 my $scfg = storage_config
($cfg, $storeid);
356 my $plugin = PVE
::Storage
::Plugin-
>lookup($scfg->{type
});
358 return $plugin->get_subdir($scfg, 'backup');
361 # library implementation
366 die "VMID '$vmid' contains illegal characters\n" if $vmid !~ m/^\d+$/;
371 # NOTE: basename and basevmid are always undef for LVM-thin, where the
372 # clone -> base reference is not encoded in the volume ID.
373 # see note in PVE::Storage::LvmThinPlugin for details.
375 my ($cfg, $volid) = @_;
377 my ($storeid, $volname) = parse_volume_id
($volid);
379 my $scfg = storage_config
($cfg, $storeid);
381 my $plugin = PVE
::Storage
::Plugin-
>lookup($scfg->{type
});
383 # returns ($vtype, $name, $vmid, $basename, $basevmid, $isBase, $format)
385 return $plugin->parse_volname($volname);
388 sub parse_volume_id
{
389 my ($volid, $noerr) = @_;
391 return PVE
::Storage
::Plugin
::parse_volume_id
($volid, $noerr);
394 # test if we have read access to volid
395 sub check_volume_access
{
396 my ($rpcenv, $user, $cfg, $vmid, $volid) = @_;
398 my ($sid, $volname) = parse_volume_id
($volid, 1);
400 my ($vtype, undef, $ownervm) = parse_volname
($cfg, $volid);
401 if ($vtype eq 'iso' || $vtype eq 'vztmpl') {
402 # require at least read access to storage, (custom) templates/ISOs could be sensitive
403 $rpcenv->check_any($user, "/storage/$sid", ['Datastore.AllocateSpace', 'Datastore.Audit']);
404 } elsif (defined($ownervm) && defined($vmid) && ($ownervm == $vmid)) {
405 # we are owner - allow access
406 } elsif ($vtype eq 'backup' && $ownervm) {
407 $rpcenv->check($user, "/storage/$sid", ['Datastore.AllocateSpace']);
408 $rpcenv->check($user, "/vms/$ownervm", ['VM.Backup']);
410 # allow if we are Datastore administrator
411 $rpcenv->check($user, "/storage/$sid", ['Datastore.Allocate']);
414 die "Only root can pass arbitrary filesystem paths."
415 if $user ne 'root@pam';
421 my $volume_is_base_and_used__no_lock = sub {
422 my ($scfg, $storeid, $plugin, $volname) = @_;
424 my ($vtype, $name, $vmid, undef, undef, $isBase, undef) =
425 $plugin->parse_volname($volname);
428 my $vollist = $plugin->list_images($storeid, $scfg);
429 foreach my $info (@$vollist) {
430 my (undef, $tmpvolname) = parse_volume_id
($info->{volid
});
431 my $basename = undef;
432 my $basevmid = undef;
435 (undef, undef, undef, $basename, $basevmid) =
436 $plugin->parse_volname($tmpvolname);
439 if ($basename && defined($basevmid) && $basevmid == $vmid && $basename eq $name) {
447 # NOTE: this check does not work for LVM-thin, where the clone -> base
448 # reference is not encoded in the volume ID.
449 # see note in PVE::Storage::LvmThinPlugin for details.
450 sub volume_is_base_and_used
{
451 my ($cfg, $volid) = @_;
453 my ($storeid, $volname) = parse_volume_id
($volid);
454 my $scfg = storage_config
($cfg, $storeid);
455 my $plugin = PVE
::Storage
::Plugin-
>lookup($scfg->{type
});
457 $plugin->cluster_lock_storage($storeid, $scfg->{shared
}, undef, sub {
458 return &$volume_is_base_and_used__no_lock($scfg, $storeid, $plugin, $volname);
462 # try to map a filesystem path to a volume identifier
463 sub path_to_volume_id
{
464 my ($cfg, $path) = @_;
466 my $ids = $cfg->{ids
};
468 my ($sid, $volname) = parse_volume_id
($path, 1);
470 if (my $scfg = $ids->{$sid}) {
472 my $plugin = PVE
::Storage
::Plugin-
>lookup($scfg->{type
});
473 my ($vtype, $name, $vmid) = $plugin->parse_volname($volname);
474 return ($vtype, $path);
480 # Note: abs_path() return undef if $path doesn not exist
481 # for example when nfs storage is not mounted
482 $path = abs_path
($path) || $path;
484 foreach my $sid (keys %$ids) {
485 my $scfg = $ids->{$sid};
486 next if !$scfg->{path
};
487 my $plugin = PVE
::Storage
::Plugin-
>lookup($scfg->{type
});
488 my $imagedir = $plugin->get_subdir($scfg, 'images');
489 my $isodir = $plugin->get_subdir($scfg, 'iso');
490 my $tmpldir = $plugin->get_subdir($scfg, 'vztmpl');
491 my $backupdir = $plugin->get_subdir($scfg, 'backup');
492 my $privatedir = $plugin->get_subdir($scfg, 'rootdir');
494 if ($path =~ m!^$imagedir/(\d+)/([^/\s]+)$!) {
498 my $vollist = $plugin->list_images($sid, $scfg, $vmid);
499 foreach my $info (@$vollist) {
500 my ($storeid, $volname) = parse_volume_id
($info->{volid
});
501 my $volpath = $plugin->path($scfg, $volname, $storeid);
502 if ($volpath eq $path) {
503 return ('images', $info->{volid
});
506 } elsif ($path =~ m!^$isodir/([^/]+$iso_extension_re)$!) {
508 return ('iso', "$sid:iso/$name");
509 } elsif ($path =~ m!^$tmpldir/([^/]+\.tar\.gz)$!) {
511 return ('vztmpl', "$sid:vztmpl/$name");
512 } elsif ($path =~ m!^$privatedir/(\d+)$!) {
514 return ('rootdir', "$sid:rootdir/$vmid");
515 } elsif ($path =~ m!^$backupdir/([^/]+\.(tar|tar\.gz|tar\.lzo|tgz|vma|vma\.gz|vma\.lzo))$!) {
517 return ('iso', "$sid:backup/$name");
521 # can't map path to volume id
526 my ($cfg, $volid, $snapname) = @_;
528 my ($storeid, $volname) = parse_volume_id
($volid);
530 my $scfg = storage_config
($cfg, $storeid);
532 my $plugin = PVE
::Storage
::Plugin-
>lookup($scfg->{type
});
533 my ($path, $owner, $vtype) = $plugin->path($scfg, $volname, $storeid, $snapname);
534 return wantarray ?
($path, $owner, $vtype) : $path;
537 sub abs_filesystem_path
{
538 my ($cfg, $volid) = @_;
541 if (PVE
::Storage
::parse_volume_id
($volid, 1)) {
542 PVE
::Storage
::activate_volumes
($cfg, [ $volid ]);
543 $path = PVE
::Storage
::path
($cfg, $volid);
546 my $abspath = abs_path
($volid);
547 if ($abspath && $abspath =~ m
|^(/.+)$|) {
548 $path = $1; # untaint any path
553 die "can't find file '$volid'\n" if !($path && -f
$path);
558 sub storage_migrate
{
559 my ($cfg, $volid, $target_sshinfo, $target_storeid, $target_volname, $base_snapshot, $snapshot, $ratelimit_bps, $insecure, $with_snapshots, $logfunc) = @_;
561 my ($storeid, $volname) = parse_volume_id
($volid);
562 $target_volname = $volname if !$target_volname;
564 my $scfg = storage_config
($cfg, $storeid);
566 # no need to migrate shared content
567 return if $storeid eq $target_storeid && $scfg->{shared
};
569 my $tcfg = storage_config
($cfg, $target_storeid);
571 my $target_volid = "${target_storeid}:${target_volname}";
573 my $target_ip = $target_sshinfo->{ip
};
574 my $errstr = "unable to migrate '$volid' to '${target_volid}' on host '$target_sshinfo->{name}'";
576 my $ssh = PVE
::Cluster
::ssh_info_to_command
($target_sshinfo);
577 my $ssh_base = PVE
::Cluster
::ssh_info_to_command_base
($target_sshinfo);
578 local $ENV{RSYNC_RSH
} = PVE
::Tools
::cmd2string
($ssh_base);
580 my @cstream = ([ '/usr/bin/cstream', '-t', $ratelimit_bps ])
581 if defined($ratelimit_bps);
583 my $migration_snapshot;
584 if (!defined($snapshot)) {
585 if ($scfg->{type
} eq 'zfspool') {
586 $migration_snapshot = 1;
587 $snapshot = '__migration__';
591 my @formats = volume_transfer_formats
($cfg, $volid, $volid, $snapshot, $base_snapshot, $with_snapshots);
592 die "cannot migrate from storage type '$scfg->{type}' to '$tcfg->{type}'\n" if !@formats;
593 my $format = $formats[0];
595 my $import_fn = '-'; # let pvesm import read from stdin per default
597 my $net = $target_sshinfo->{network
} // $target_sshinfo->{ip
};
598 $import_fn = "tcp://$net";
601 $with_snapshots = $with_snapshots ?
1 : 0; # sanitize for passing as cli parameter
602 my $send = ['pvesm', 'export', $volid, $format, '-', '-with-snapshots', $with_snapshots];
603 my $recv = [@$ssh, '--', 'pvesm', 'import', $volid, $format, $import_fn, '-with-snapshots', $with_snapshots];
604 if (defined($snapshot)) {
605 push @$send, '-snapshot', $snapshot
607 if ($migration_snapshot) {
608 push @$recv, '-delete-snapshot', $snapshot;
611 if (defined($base_snapshot)) {
612 # Check if the snapshot exists on the remote side:
613 push @$send, '-base', $base_snapshot;
614 push @$recv, '-base', $base_snapshot;
617 volume_snapshot
($cfg, $volid, $snapshot) if $migration_snapshot;
620 open(my $info, '-|', @$recv)
621 or die "receive command failed: $!\n";
622 my ($ip) = <$info> =~ /^($PVE::Tools::IPRE)$/ or die "no tunnel IP received\n";
623 my ($port) = <$info> =~ /^(\d+)$/ or die "no tunnel port received\n";
624 my $socket = IO
::Socket
::IP-
>new(PeerHost
=> $ip, PeerPort
=> $port, Type
=> SOCK_STREAM
)
625 or die "failed to connect to tunnel at $ip:$port\n";
626 # we won't be reading from the socket
627 shutdown($socket, 0);
628 run_command
([$send, @cstream], output
=> '>&'.fileno($socket));
629 # don't close the connection entirely otherwise the receiving end
630 # might not get all buffered data (and fails with 'connection reset by peer')
631 shutdown($socket, 1);
632 1 while <$info>; # wait for the remote process to finish
633 # now close the socket
635 if (!close($info)) { # does waitpid()
636 die "import failed: $!\n" if $!;
637 die "import failed: exit code ".($?>>8)."\n";
640 run_command
([$send, @cstream, $recv], logfunc
=> $logfunc);
644 warn "send/receive failed, cleaning up snapshot(s)..\n" if $err;
645 if ($migration_snapshot) {
646 eval { volume_snapshot_delete
($cfg, $volid, $snapshot, 0) };
647 warn "could not remove source snapshot: $@\n" if $@;
653 my ($cfg, $volid, $vmid, $snap) = @_;
655 my ($storeid, $volname) = parse_volume_id
($volid);
657 my $scfg = storage_config
($cfg, $storeid);
659 my $plugin = PVE
::Storage
::Plugin-
>lookup($scfg->{type
});
661 activate_storage
($cfg, $storeid);
663 # lock shared storage
664 return $plugin->cluster_lock_storage($storeid, $scfg->{shared
}, undef, sub {
665 my $volname = $plugin->clone_image($scfg, $storeid, $volname, $vmid, $snap);
666 return "$storeid:$volname";
670 sub vdisk_create_base
{
671 my ($cfg, $volid) = @_;
673 my ($storeid, $volname) = parse_volume_id
($volid);
675 my $scfg = storage_config
($cfg, $storeid);
677 my $plugin = PVE
::Storage
::Plugin-
>lookup($scfg->{type
});
679 activate_storage
($cfg, $storeid);
681 # lock shared storage
682 return $plugin->cluster_lock_storage($storeid, $scfg->{shared
}, undef, sub {
683 my $volname = $plugin->create_base($storeid, $scfg, $volname);
684 return "$storeid:$volname";
689 my ($cfg, $volid, $snapname) = @_;
691 my ($storeid, $volname) = parse_volume_id
($volid);
693 my $scfg = storage_config
($cfg, $storeid);
695 my $plugin = PVE
::Storage
::Plugin-
>lookup($scfg->{type
});
697 return $plugin->map_volume($storeid, $scfg, $volname, $snapname);
701 my ($cfg, $volid, $snapname) = @_;
703 my ($storeid, $volname) = parse_volume_id
($volid);
705 my $scfg = storage_config
($cfg, $storeid);
707 my $plugin = PVE
::Storage
::Plugin-
>lookup($scfg->{type
});
709 return $plugin->unmap_volume($storeid, $scfg, $volname, $snapname);
713 my ($cfg, $storeid, $vmid, $fmt, $name, $size) = @_;
715 die "no storage ID specified\n" if !$storeid;
717 PVE
::JSONSchema
::parse_storage_id
($storeid);
719 my $scfg = storage_config
($cfg, $storeid);
721 die "no VMID specified\n" if !$vmid;
723 $vmid = parse_vmid
($vmid);
725 my $defformat = PVE
::Storage
::Plugin
::default_format
($scfg);
727 $fmt = $defformat if !$fmt;
729 activate_storage
($cfg, $storeid);
731 my $plugin = PVE
::Storage
::Plugin-
>lookup($scfg->{type
});
733 # lock shared storage
734 return $plugin->cluster_lock_storage($storeid, $scfg->{shared
}, undef, sub {
735 my $old_umask = umask(umask|0037);
736 my $volname = eval { $plugin->alloc_image($storeid, $scfg, $vmid, $fmt, $name, $size) };
740 return "$storeid:$volname";
745 my ($cfg, $volid) = @_;
747 my ($storeid, $volname) = parse_volume_id
($volid);
748 my $scfg = storage_config
($cfg, $storeid);
749 my $plugin = PVE
::Storage
::Plugin-
>lookup($scfg->{type
});
751 activate_storage
($cfg, $storeid);
755 # lock shared storage
756 $plugin->cluster_lock_storage($storeid, $scfg->{shared
}, undef, sub {
757 # LVM-thin allows deletion of still referenced base volumes!
758 die "base volume '$volname' is still in use by linked clones\n"
759 if &$volume_is_base_and_used__no_lock($scfg, $storeid, $plugin, $volname);
761 my (undef, undef, undef, undef, undef, $isBase, $format) =
762 $plugin->parse_volname($volname);
763 $cleanup_worker = $plugin->free_image($storeid, $scfg, $volname, $isBase, $format);
766 return if !$cleanup_worker;
768 my $rpcenv = PVE
::RPCEnvironment
::get
();
769 my $authuser = $rpcenv->get_user();
771 $rpcenv->fork_worker('imgdel', undef, $authuser, $cleanup_worker);
775 my ($cfg, $storeid, $vmid, $vollist) = @_;
777 my $ids = $cfg->{ids
};
779 storage_check_enabled
($cfg, $storeid) if ($storeid);
783 # prepare/activate/refresh all storages
785 my $storage_list = [];
787 foreach my $volid (@$vollist) {
788 my ($sid, undef) = parse_volume_id
($volid);
789 next if !defined($ids->{$sid});
790 next if !storage_check_enabled
($cfg, $sid, undef, 1);
791 push @$storage_list, $sid;
794 foreach my $sid (keys %$ids) {
795 next if $storeid && $storeid ne $sid;
796 next if !storage_check_enabled
($cfg, $sid, undef, 1);
797 push @$storage_list, $sid;
803 activate_storage_list
($cfg, $storage_list, $cache);
805 foreach my $sid (keys %$ids) {
806 next if $storeid && $storeid ne $sid;
807 next if !storage_check_enabled
($cfg, $sid, undef, 1);
809 my $scfg = $ids->{$sid};
810 my $plugin = PVE
::Storage
::Plugin-
>lookup($scfg->{type
});
811 $res->{$sid} = $plugin->list_images($sid, $scfg, $vmid, $vollist, $cache);
812 @{$res->{$sid}} = sort {lc($a->{volid
}) cmp lc ($b->{volid
}) } @{$res->{$sid}} if $res->{$sid};
819 my ($cfg, $storeid, $tt) = @_;
821 die "unknown template type '$tt'\n"
822 if !($tt eq 'iso' || $tt eq 'vztmpl' || $tt eq 'backup' || $tt eq 'snippets');
824 my $ids = $cfg->{ids
};
826 storage_check_enabled
($cfg, $storeid) if ($storeid);
831 foreach my $sid (keys %$ids) {
832 next if $storeid && $storeid ne $sid;
834 my $scfg = $ids->{$sid};
835 my $type = $scfg->{type
};
837 next if !$scfg->{content
}->{$tt};
839 next if !storage_check_enabled
($cfg, $sid, undef, 1);
841 $res->{$sid} = volume_list
($cfg, $sid, undef, $tt);
848 my ($cfg, $storeid, $vmid, $content) = @_;
850 my @ctypes = qw(rootdir images vztmpl iso backup snippets);
852 my $cts = $content ?
[ $content ] : [ @ctypes ];
854 my $scfg = PVE
::Storage
::storage_config
($cfg, $storeid);
856 $cts = [ grep { defined($scfg->{content
}->{$_}) } @$cts ];
858 my $plugin = PVE
::Storage
::Plugin-
>lookup($scfg->{type
});
860 activate_storage
($cfg, $storeid);
862 my $res = $plugin->list_volumes($storeid, $scfg, $vmid, $cts);
864 @$res = sort {lc($a->{volid
}) cmp lc ($b->{volid
}) } @$res;
871 my $filename = "/sys/kernel/uevent_seqnum";
874 if (my $fh = IO
::File-
>new($filename, "r")) {
876 if ($line =~ m/^(\d+)$/) {
884 sub activate_storage
{
885 my ($cfg, $storeid, $cache) = @_;
887 $cache = {} if !$cache;
889 my $scfg = storage_check_enabled
($cfg, $storeid);
891 return if $cache->{activated
}->{$storeid};
893 $cache->{uevent_seqnum
} = uevent_seqnum
() if !$cache->{uevent_seqnum
};
895 my $plugin = PVE
::Storage
::Plugin-
>lookup($scfg->{type
});
898 my ($baseid, undef) = parse_volume_id
($scfg->{base
});
899 activate_storage
($cfg, $baseid, $cache);
902 if (!$plugin->check_connection($storeid, $scfg)) {
903 die "storage '$storeid' is not online\n";
906 $plugin->activate_storage($storeid, $scfg, $cache);
908 my $newseq = uevent_seqnum
();
910 # only call udevsettle if there are events
911 if ($newseq > $cache->{uevent_seqnum
}) {
913 system ("$UDEVADM settle --timeout=$timeout"); # ignore errors
914 $cache->{uevent_seqnum
} = $newseq;
917 $cache->{activated
}->{$storeid} = 1;
920 sub activate_storage_list
{
921 my ($cfg, $storeid_list, $cache) = @_;
923 $cache = {} if !$cache;
925 foreach my $storeid (@$storeid_list) {
926 activate_storage
($cfg, $storeid, $cache);
930 sub deactivate_storage
{
931 my ($cfg, $storeid) = @_;
933 my $scfg = storage_config
($cfg, $storeid);
934 my $plugin = PVE
::Storage
::Plugin-
>lookup($scfg->{type
});
937 $plugin->deactivate_storage($storeid, $scfg, $cache);
940 sub activate_volumes
{
941 my ($cfg, $vollist, $snapname) = @_;
943 return if !($vollist && scalar(@$vollist));
945 my $storagehash = {};
946 foreach my $volid (@$vollist) {
947 my ($storeid, undef) = parse_volume_id
($volid);
948 $storagehash->{$storeid} = 1;
953 activate_storage_list
($cfg, [keys %$storagehash], $cache);
955 foreach my $volid (@$vollist) {
956 my ($storeid, $volname) = parse_volume_id
($volid);
957 my $scfg = storage_config
($cfg, $storeid);
958 my $plugin = PVE
::Storage
::Plugin-
>lookup($scfg->{type
});
959 $plugin->activate_volume($storeid, $scfg, $volname, $snapname, $cache);
963 sub deactivate_volumes
{
964 my ($cfg, $vollist, $snapname) = @_;
966 return if !($vollist && scalar(@$vollist));
971 foreach my $volid (@$vollist) {
972 my ($storeid, $volname) = parse_volume_id
($volid);
974 my $scfg = storage_config
($cfg, $storeid);
975 my $plugin = PVE
::Storage
::Plugin-
>lookup($scfg->{type
});
978 $plugin->deactivate_volume($storeid, $scfg, $volname, $snapname, $cache);
982 push @errlist, $volid;
986 die "volume deactivation failed: " . join(' ', @errlist)
991 my ($cfg, $content, $includeformat) = @_;
993 my $ids = $cfg->{ids
};
997 my @ctypes = PVE
::Tools
::split_list
($content);
1000 foreach my $storeid (keys %$ids) {
1001 my $storage_enabled = defined(storage_check_enabled
($cfg, $storeid, undef, 1));
1003 if (defined($content)) {
1005 foreach my $ctype (@ctypes) {
1006 if ($ids->{$storeid}->{content
}->{$ctype}) {
1011 next if !$want_ctype || !$storage_enabled;
1014 my $type = $ids->{$storeid}->{type
};
1016 $info->{$storeid} = {
1021 shared
=> $ids->{$storeid}->{shared
} ?
1 : 0,
1022 content
=> PVE
::Storage
::Plugin
::content_hash_to_string
($ids->{$storeid}->{content
}),
1024 enabled
=> $storage_enabled ?
1 : 0,
1027 push @$slist, $storeid;
1032 foreach my $storeid (keys %$ids) {
1033 my $scfg = $ids->{$storeid};
1035 next if !$info->{$storeid};
1036 next if !$info->{$storeid}->{enabled
};
1038 my $plugin = PVE
::Storage
::Plugin-
>lookup($scfg->{type
});
1039 if ($includeformat) {
1040 my $pd = $plugin->plugindata();
1041 $info->{$storeid}->{format
} = $pd->{format
}
1043 $info->{$storeid}->{select_existing
} = $pd->{select_existing
}
1044 if $pd->{select_existing
};
1047 eval { activate_storage
($cfg, $storeid, $cache); };
1053 my ($total, $avail, $used, $active) = eval { $plugin->status($storeid, $scfg, $cache); };
1056 $info->{$storeid}->{total
} = int($total);
1057 $info->{$storeid}->{avail
} = int($avail);
1058 $info->{$storeid}->{used
} = int($used);
1059 $info->{$storeid}->{active
} = $active;
1068 my ($packed_ip, $family);
1070 my @res = PVE
::Tools
::getaddrinfo_all
($server);
1071 $family = $res[0]->{family
};
1072 $packed_ip = (PVE
::Tools
::unpack_sockaddr_in46
($res[0]->{addr
}))[2];
1074 if (defined $packed_ip) {
1075 return Socket
::inet_ntop
($family, $packed_ip);
1081 my ($server_in) = @_;
1084 if (!($server = resolv_server
($server_in))) {
1085 die "unable to resolve address for server '${server_in}'\n";
1088 my $cmd = ['/sbin/showmount', '--no-headers', '--exports', $server];
1091 run_command
($cmd, outfunc
=> sub {
1094 # note: howto handle white spaces in export path??
1095 if ($line =~ m!^(/\S+)\s+(.+)$!) {
1104 my ($server_in, $user, $password, $domain) = @_;
1107 if (!($server = resolv_server
($server_in))) {
1108 die "unable to resolve address for server '${server_in}'\n";
1111 # we support only Windows grater than 2012 cifsscan so use smb3
1112 my $cmd = ['/usr/bin/smbclient', '-m', 'smb3', '-d', '0', '-L', $server];
1113 if (defined($user)) {
1114 die "password is required" if !defined($password);
1115 push @$cmd, '-U', "$user\%$password";
1116 push @$cmd, '-W', $domain if defined($domain);
1125 if ($line =~ m/(\S+)\s*Disk\s*(\S*)/) {
1127 } elsif ($line =~ m/(NT_STATUS_(\S*))/) {
1140 my $cmd = ['zfs', 'list', '-t', 'filesystem', '-H', '-o', 'name,avail,used'];
1143 run_command
($cmd, outfunc
=> sub {
1146 if ($line =~m/^(\S+)\s+(\S+)\s+(\S+)$/) {
1147 my ($pool, $size_str, $used_str) = ($1, $2, $3);
1148 my $size = PVE
::Storage
::ZFSPoolPlugin
::zfs_parse_size
($size_str);
1149 my $used = PVE
::Storage
::ZFSPoolPlugin
::zfs_parse_size
($used_str);
1150 # ignore subvolumes generated by our ZFSPoolPlugin
1151 return if $pool =~ m!/subvol-\d+-[^/]+$!;
1152 return if $pool =~ m!/basevol-\d+-[^/]+$!;
1153 push @$res, { pool
=> $pool, size
=> $size, free
=> $size-$used };
1161 my ($portal, $noerr) = @_;
1163 my ($server, $port) = PVE
::Tools
::parse_host_and_port
($portal);
1165 if (my $ip = resolv_server
($server)) {
1167 $server = "[$server]" if $server =~ /^$IPV6RE$/;
1168 return $port ?
"$server:$port" : $server;
1171 return undef if $noerr;
1173 raise_param_exc
({ portal
=> "unable to resolve portal address '$portal'" });
1178 my ($portal_in) = @_;
1181 if (!($portal = resolv_portal
($portal_in))) {
1182 die "unable to parse/resolve portal address '${portal_in}'\n";
1185 return PVE
::Storage
::ISCSIPlugin
::iscsi_discovery
($portal);
1188 sub storage_default_format
{
1189 my ($cfg, $storeid) = @_;
1191 my $scfg = storage_config
($cfg, $storeid);
1193 return PVE
::Storage
::Plugin
::default_format
($scfg);
1196 sub vgroup_is_used
{
1197 my ($cfg, $vgname) = @_;
1199 foreach my $storeid (keys %{$cfg->{ids
}}) {
1200 my $scfg = storage_config
($cfg, $storeid);
1201 if ($scfg->{type
} eq 'lvm' && $scfg->{vgname
} eq $vgname) {
1209 sub target_is_used
{
1210 my ($cfg, $target) = @_;
1212 foreach my $storeid (keys %{$cfg->{ids
}}) {
1213 my $scfg = storage_config
($cfg, $storeid);
1214 if ($scfg->{type
} eq 'iscsi' && $scfg->{target
} eq $target) {
1222 sub volume_is_used
{
1223 my ($cfg, $volid) = @_;
1225 foreach my $storeid (keys %{$cfg->{ids
}}) {
1226 my $scfg = storage_config
($cfg, $storeid);
1227 if ($scfg->{base
} && $scfg->{base
} eq $volid) {
1235 sub storage_is_used
{
1236 my ($cfg, $storeid) = @_;
1238 foreach my $sid (keys %{$cfg->{ids
}}) {
1239 my $scfg = storage_config
($cfg, $sid);
1240 next if !$scfg->{base
};
1241 my ($st) = parse_volume_id
($scfg->{base
});
1242 return 1 if $st && $st eq $storeid;
1249 my ($list, $func) = @_;
1253 foreach my $sid (keys %$list) {
1254 foreach my $info (@{$list->{$sid}}) {
1255 my $volid = $info->{volid
};
1256 my ($sid1, $volname) = parse_volume_id
($volid, 1);
1257 if ($sid1 && $sid1 eq $sid) {
1258 &$func ($volid, $sid, $info);
1260 warn "detected strange volid '$volid' in volume list for '$sid'\n";
1266 sub extract_vzdump_config_tar
{
1267 my ($archive, $conf_re) = @_;
1269 die "ERROR: file '$archive' does not exist\n" if ! -f
$archive;
1271 my $pid = open(my $fh, '-|', 'tar', 'tf', $archive) ||
1272 die "unable to open file '$archive'\n";
1275 while (defined($file = <$fh>)) {
1276 if ($file =~ $conf_re) {
1277 $file = $1; # untaint
1286 die "ERROR: archive contains no configuration file\n" if !$file;
1292 $raw .= "$output\n";
1295 PVE
::Tools
::run_command
(['tar', '-xpOf', $archive, $file, '--occurrence'], outfunc
=> $out);
1297 return wantarray ?
($raw, $file) : $raw;
1300 sub extract_vzdump_config_vma
{
1301 my ($archive, $comp) = @_;
1307 $raw .= "$output\n";
1313 if ($comp eq 'gz') {
1314 $uncomp = ["zcat", $archive];
1315 } elsif ($comp eq 'lzo') {
1316 $uncomp = ["lzop", "-d", "-c", $archive];
1318 die "unknown compression method '$comp'\n";
1320 $cmd = [$uncomp, ["vma", "config", "-"]];
1322 # in some cases, lzop/zcat exits with 1 when its stdout pipe is
1323 # closed early by vma, detect this and ignore the exit code later
1328 if ($output =~ m/lzop: Broken pipe: <stdout>/ || $output =~ m/gzip: stdout: Broken pipe/) {
1330 } elsif (!defined ($errstring) && $output !~ m/^\s*$/) {
1331 $errstring = "Failed to extract config from VMA archive: $output\n";
1335 # in other cases, the pipeline will exit with exit code 141
1336 # because of the broken pipe, handle / ignore this as well
1339 $rc = PVE
::Tools
::run_command
($cmd, outfunc
=> $out, errfunc
=> $err, noerr
=> 1);
1343 # use exit code if no stderr output and not just broken pipe
1344 if (!$errstring && !$broken_pipe && $rc != 0 && $rc != 141) {
1345 die "$rerr\n" if $rerr;
1346 die "config extraction failed with exit code $rc\n";
1348 die "$errstring\n" if $errstring;
1350 # simple case without compression and weird piping behaviour
1351 PVE
::Tools
::run_command
(["vma", "config", $archive], outfunc
=> $out);
1354 return wantarray ?
($raw, undef) : $raw;
1357 sub extract_vzdump_config
{
1358 my ($cfg, $volid) = @_;
1360 my $archive = abs_filesystem_path
($cfg, $volid);
1362 if ($volid =~ /vzdump-(lxc|openvz)-\d+-(\d{4})_(\d{2})_(\d{2})-(\d{2})_(\d{2})_(\d{2})\.(tgz|(tar(\.(gz|lzo))?))$/) {
1363 return extract_vzdump_config_tar
($archive, qr!^(\./etc/vzdump/(pct|vps)\.conf)$!);
1364 } elsif ($volid =~ /vzdump-qemu-\d+-(\d{4})_(\d{2})_(\d{2})-(\d{2})_(\d{2})_(\d{2})\.(tgz|((tar|vma)(\.(gz|lzo))?))$/) {
1372 $comp = $11 if defined($11);
1375 if ($format eq 'tar') {
1376 return extract_vzdump_config_tar
($archive, qr!\(\./qemu-server\.conf\)!);
1378 return extract_vzdump_config_vma
($archive, $comp);
1381 die "cannot determine backup guest type for backup archive '$volid'\n";
1386 my ($cfg, $fh, $volid, $format, $snapshot, $base_snapshot, $with_snapshots) = @_;
1388 my ($storeid, $volname) = parse_volume_id
($volid, 1);
1389 die "cannot export volume '$volid'\n" if !$storeid;
1390 my $scfg = storage_config
($cfg, $storeid);
1391 my $plugin = PVE
::Storage
::Plugin-
>lookup($scfg->{type
});
1392 return $plugin->volume_export($scfg, $storeid, $fh, $volname, $format,
1393 $snapshot, $base_snapshot, $with_snapshots);
1397 my ($cfg, $fh, $volid, $format, $base_snapshot, $with_snapshots) = @_;
1399 my ($storeid, $volname) = parse_volume_id
($volid, 1);
1400 die "cannot import into volume '$volid'\n" if !$storeid;
1401 my $scfg = storage_config
($cfg, $storeid);
1402 my $plugin = PVE
::Storage
::Plugin-
>lookup($scfg->{type
});
1403 return $plugin->volume_import($scfg, $storeid, $fh, $volname, $format,
1404 $base_snapshot, $with_snapshots);
1407 sub volume_export_formats
{
1408 my ($cfg, $volid, $snapshot, $base_snapshot, $with_snapshots) = @_;
1410 my ($storeid, $volname) = parse_volume_id
($volid, 1);
1411 return if !$storeid;
1412 my $scfg = storage_config
($cfg, $storeid);
1413 my $plugin = PVE
::Storage
::Plugin-
>lookup($scfg->{type
});
1414 return $plugin->volume_export_formats($scfg, $storeid, $volname,
1415 $snapshot, $base_snapshot,
1419 sub volume_import_formats
{
1420 my ($cfg, $volid, $base_snapshot, $with_snapshots) = @_;
1422 my ($storeid, $volname) = parse_volume_id
($volid, 1);
1423 return if !$storeid;
1424 my $scfg = storage_config
($cfg, $storeid);
1425 my $plugin = PVE
::Storage
::Plugin-
>lookup($scfg->{type
});
1426 return $plugin->volume_import_formats($scfg, $storeid, $volname,
1427 $base_snapshot, $with_snapshots);
1430 sub volume_transfer_formats
{
1431 my ($cfg, $src_volid, $dst_volid, $snapshot, $base_snapshot, $with_snapshots) = @_;
1432 my @export_formats = volume_export_formats
($cfg, $src_volid, $snapshot, $base_snapshot, $with_snapshots);
1433 my @import_formats = volume_import_formats
($cfg, $dst_volid, $base_snapshot, $with_snapshots);
1434 my %import_hash = map { $_ => 1 } @import_formats;
1435 my @common = grep { $import_hash{$_} } @export_formats;
1439 # bash completion helper
1441 sub complete_storage
{
1442 my ($cmdname, $pname, $cvalue) = @_;
1444 my $cfg = PVE
::Storage
::config
();
1446 return $cmdname eq 'add' ?
[] : [ PVE
::Storage
::storage_ids
($cfg) ];
1449 sub complete_storage_enabled
{
1450 my ($cmdname, $pname, $cvalue) = @_;
1454 my $cfg = PVE
::Storage
::config
();
1455 foreach my $sid (keys %{$cfg->{ids
}}) {
1456 next if !storage_check_enabled
($cfg, $sid, undef, 1);
1462 sub complete_content_type
{
1463 my ($cmdname, $pname, $cvalue) = @_;
1465 return [qw(rootdir images vztmpl iso backup snippets)];
1468 sub complete_volume
{
1469 my ($cmdname, $pname, $cvalue) = @_;
1473 my $storage_list = complete_storage_enabled
();
1475 if ($cvalue =~ m/^([^:]+):/) {
1476 $storage_list = [ $1 ];
1478 if (scalar(@$storage_list) > 1) {
1479 # only list storage IDs to avoid large listings
1481 foreach my $storeid (@$storage_list) {
1482 # Hack: simply return 2 artificial values, so that
1483 # completions does not finish
1484 push @$res, "$storeid:volname", "$storeid:...";
1491 foreach my $storeid (@$storage_list) {
1492 my $vollist = PVE
::Storage
::volume_list
($cfg, $storeid);
1494 foreach my $item (@$vollist) {
1495 push @$res, $item->{volid
};
1502 # Various io-heavy operations require io/bandwidth limits which can be
1503 # configured on multiple levels: The global defaults in datacenter.cfg, and
1504 # per-storage overrides. When we want to do a restore from storage A to storage
1505 # B, we should take the smaller limit defined for storages A and B, and if no
1506 # such limit was specified, use the one from datacenter.cfg.
1507 sub get_bandwidth_limit
{
1508 my ($operation, $storage_list, $override) = @_;
1510 # called for each limit (global, per-storage) with the 'default' and the
1511 # $operation limit and should udpate $override for every limit affecting
1513 my $use_global_limits = 0;
1514 my $apply_limit = sub {
1516 if (defined($bwlimit)) {
1517 my $limits = PVE
::JSONSchema
::parse_property_string
('bwlimit', $bwlimit);
1518 my $limit = $limits->{$operation} // $limits->{default};
1519 if (defined($limit)) {
1520 if (!$override || $limit < $override) {
1526 # If there was no applicable limit, try to apply the global ones.
1527 $use_global_limits = 1;
1530 my ($rpcenv, $authuser);
1531 if (defined($override)) {
1532 $rpcenv = PVE
::RPCEnvironment-
>get();
1533 $authuser = $rpcenv->get_user();
1536 # Apply per-storage limits - if there are storages involved.
1537 if (defined($storage_list) && @$storage_list) {
1538 my $config = config
();
1540 # The Datastore.Allocate permission allows us to modify the per-storage
1541 # limits, therefore it also allows us to override them.
1542 # Since we have most likely multiple storages to check, do a quick check on
1543 # the general '/storage' path to see if we can skip the checks entirely:
1544 return $override if $rpcenv && $rpcenv->check($authuser, '/storage', ['Datastore.Allocate'], 1);
1547 foreach my $storage (@$storage_list) {
1548 next if !defined($storage);
1549 # Avoid duplicate checks:
1550 next if $done{$storage};
1551 $done{$storage} = 1;
1553 # Otherwise we may still have individual /storage/$ID permissions:
1554 if (!$rpcenv || !$rpcenv->check($authuser, "/storage/$storage", ['Datastore.Allocate'], 1)) {
1555 # And if not: apply the limits.
1556 my $storecfg = storage_config
($config, $storage);
1557 $apply_limit->($storecfg->{bwlimit
});
1561 # Storage limits take precedence over the datacenter defaults, so if
1562 # a limit was applied:
1563 return $override if !$use_global_limits;
1566 # Sys.Modify on '/' means we can change datacenter.cfg which contains the
1567 # global default limits.
1568 if (!$rpcenv || !$rpcenv->check($authuser, '/', ['Sys.Modify'], 1)) {
1569 # So if we cannot modify global limits, apply them to our currently
1570 # requested override.
1571 my $dc = cfs_read_file
('datacenter.cfg');
1572 $apply_limit->($dc->{bwlimit
});
1578 # checks if the storage id is available and dies if not
1579 sub assert_sid_unused
{
1583 if (my $scfg = storage_config
($cfg, $sid, 1)) {
1584 die "storage ID '$sid' already defined\n";