manage_dataset.in 19.3 KB
Newer Older
1 2
#!/usr/bin/perl -w
#
3
# Copyright (c) 2000-2015 University of Utah and the Flux Group.
4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39
# 
# {{{EMULAB-LICENSE
# 
# This file is part of the Emulab network testbed software.
# 
# This file is free software: you can redistribute it and/or modify it
# under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or (at
# your option) any later version.
# 
# This file is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Affero General Public
# License for more details.
# 
# You should have received a copy of the GNU Affero General Public License
# along with this file.  If not, see <http://www.gnu.org/licenses/>.
# 
# }}}
#
use English;
use strict;
use Getopt::Std;
use Data::Dumper;
use POSIX ":sys_wait_h";
use POSIX qw(setsid close);
use Date::Parse;

#
# Back-end script to manage APT profiles.
#
sub usage()
{
    print STDERR "Usage: manage_dataset [options --] create ...\n";
    print STDERR "Usage: manage_dataset [options --] delete ...\n";
    print STDERR "Usage: manage_dataset [options --] refresh ...\n";
40 41
    print STDERR "Usage: manage_dataset [options --] modify ...\n";
    print STDERR "Usage: manage_dataset [options --] extend ...\n";
42
    print STDERR "Usage: manage_dataset [options --] snapshot ...\n";
43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77
    exit(-1);
}
my $optlist     = "dt:";
my $debug       = 0;
my $webtask_id;
my $webtask;

#
# Configure variables
#
my $TB		= "@prefix@";
my $TBOPS       = "@TBOPSEMAIL@";

#
# Untaint the path
#
$ENV{'PATH'} = "$TB/bin:$TB/sbin:/bin:/usr/bin:/usr/bin:/usr/sbin";
delete @ENV{'IFS', 'CDPATH', 'ENV', 'BASH_ENV'};

#
# Turn off line buffering on output
#
$| = 1;

#
# Load the Testbed support stuff.
#
use lib "@prefix@/lib";
use libtestbed;
use EmulabConstants;
use emdb;
use emutil;
use User;
use Project;
use APT_Dataset;
78
use APT_Instance;
79 80 81
use WebTask;
use Blockstore;
use GeniResponse;
82
use GeniXML;
83 84 85 86 87 88 89

# Protos
sub fatal($);
sub DoCreate();
sub DoDelete();
sub DoRefresh();
sub DoRefreshInternal($$);
90 91
sub DoModify();
sub DoExtend();
92
sub DoSnapshot();
93
sub DoSnapShotInternal($$$$$);
94
sub PollDatasetStatus($$);
95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133

#
# Parse command arguments. Once we return from getopts, all that should be
# left are the required arguments.
#
my %options = ();
if (grep {$_ eq "--"} @ARGV &&
    ! getopts($optlist, \%options)) {
    usage();
}
if (defined($options{"d"})) {
    $debug = 1;
}
if (defined($options{"t"})) {
    $webtask_id = $options{"t"};
}
if (@ARGV < 1) {
    usage();
}

# The web interface (and in the future the xmlrpc interface) sets this.
my $this_user = User->ImpliedUser();
if (! defined($this_user)) {
    $this_user = User->ThisUser();
    if (!defined($this_user)) {
	fatal("You ($UID) do not exist!");
    }
}
my $action = shift(@ARGV);

if ($action eq "create") {
    exit(DoCreate());
}
elsif ($action eq "delete") {
    exit(DoDelete());
}
elsif ($action eq "refresh") {
    exit(DoRefresh());
}
134 135 136 137 138 139
elsif ($action eq "modify") {
    exit(DoModify());
}
elsif ($action eq "extend") {
    exit(DoExtend());
}
140 141 142
elsif ($action eq "snapshot") {
    exit(DoSnapshot());
}
143 144 145 146 147 148 149 150 151 152 153 154
else {
    usage();
}
exit(1);

#
# 
#
sub DoCreate()
{
    my $usage = sub {
	print STDERR "Usage: manage_dataset create ".
155
	    "[-t type] [-f fstype] [-e expiration] [-a am_urn] ".
156
	    "[-R global|project] [-W creator|project] ".
Leigh Stoller's avatar
Leigh Stoller committed
157
	    "-s size pid/name\n";
158 159 160 161 162 163
	exit(-1);
    };
    my $aggregate_urn = "urn:publicid:IDN+apt.emulab.net+authority+cm";
    my $errmsg;
    my $pid;
    my $expires;
164
    my $size = 0;
165 166
    my $type = "stdataset";
    my $fstype;
167 168
    my $read_access;
    my $write_access;
169
    # imdataset snapshot info.
170
    my ($instance,$aggregate,$nodeid,$bsname);
171
    
172
    my $optlist = "ds:t:e:f:w:p:R:W:I:i:";
173 174 175 176 177 178 179 180 181 182
    my %options = ();
    if (! getopts($optlist, \%options)) {
	&$usage();
    }
    if (defined($options{"d"})) {
	$debug = 1;
    }
    if (defined($options{"t"})) {
	$type = $options{"t"};
	&$usage()
183 184
	    if (! ($type eq "stdataset" || $type eq "ltdataset" ||
		   $type eq "imdataset"));
185
    }
186
    if ($type eq "imdataset") {
187 188 189 190 191 192 193 194 195 196 197 198 199 200 201
	if (!exists($options{"i"})) {
	    print STDERR "Must provide -i opton for imdatasets\n";
	    &$usage();
	}
	if (!exists($options{"I"})) {
	    print STDERR "Must provide -I opton for imdatasets\n";
	    &$usage();
	}
	$instance = APT_Instance->Lookup($options{"i"});
	if (!defined($instance)) {
	    fatal("Instance does not exist!");
	}
	($nodeid,$bsname) = split(",", $options{"I"});
	if (! (defined($nodeid) && defined($bsname))) {
	    print STDERR "Improper -I opton for imdatasets\n";
202 203
	    &$usage();
	}
204 205 206 207
	$aggregate = $instance->FindAggregateByNodeId($nodeid);
	if (!defined($aggregate)) {
	    fatal("Could not find aggregate for $nodeid");
	}
208
	$aggregate_urn = $aggregate->aggregate_urn();
209
    }
210 211 212 213 214 215 216 217 218 219 220 221
    if (defined($options{"f"})) {
	$fstype = $options{"f"};
	&$usage()
	    if ($fstype !~ /^(ext2|ext3|ext4|ufs|ufs2)$/);
    }
    if (defined($options{"R"})) {
	$read_access = $options{"R"};
	&$usage()
	    if ($read_access !~ /^(global|project)$/);
    }
    if (defined($options{"W"})) {
	$write_access = $options{"W"};
Leigh Stoller's avatar
Leigh Stoller committed
222
	&$usage()
223
	    if ($write_access !~ /^(creator|project)$/);
Leigh Stoller's avatar
Leigh Stoller committed
224
    }
225 226 227 228 229 230 231 232 233
    if (defined($options{"s"})) {
	if ($options{"s"} =~ /^(\d+)$/) {
	    $size = $1;
	}
	elsif ($options{"s"} =~ /^(\d+)(\w+)$/) {
	    $size = Blockstore::ConvertToMebi($options{"s"});
	    if ($size < 0) {
		fatal("Could not parse size.");
	    }
234 235 236
	    if ($size <= 1) {
		fatal("Size too small, try a little bigger");
	    }
237 238 239 240 241 242 243 244 245 246 247 248
	}
	else {
	    &$usage();
	}
    }
    if (defined($options{"e"})) {
	$expires = str2time($options{"e"});
	if (!defined($expires)) {
	    fatal("Could not parse expiration date.");
	}
	$expires = $options{"e"};
    }
249
    
250
    &$usage()
251 252
	if (@ARGV != 1 ||
	    ($type ne "imdataset" && !defined($size)) ||
253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288
	    ($type eq "stdataset" && !defined($expires)));
    my $name = shift(@ARGV);

    if ($name =~ /^([-\w]+)\/([-\w]+)$/) {
	$pid  = $1;
	$name = $2;
    }
    else {
	fatal("Dataset name $name not in the form <pid>/<name>.");
    }
    my $project = Project->Lookup($pid);
    if (!defined($project)) {
	fatal("No such project");
    }
    if (!$project->AccessCheck($this_user, TB_PROJECT_CREATELEASE())) {
	fatal("Not enough permission in project");
    }
    &$usage()
	if ($type eq "stdataset" && !defined($expires));

    if (APT_Dataset->Lookup("$pid/$name")) {
	fatal("Dataset already exists!");
    }

    my $blob = {
	"dataset_id"     => $name,
	"pid"            => $project->pid(),
	"pid_idx"        => $project->pid_idx,
	"creator_uid"    => $this_user->uid(),
	"creator_idx"    => $this_user->uid_idx(),
	"aggregate_urn"  => $aggregate_urn,
	"type"           => $type,
	"size"           => $size,
    };
    $blob->{"fstype"} = $fstype
	if (defined($fstype));
Leigh Stoller's avatar
Leigh Stoller committed
289
    $blob->{"expires"} = TBDateStringLocal($expires)
290
	if (defined($expires));
291 292 293 294
    $blob->{"read_access"} = $read_access
	if (defined($read_access));
    $blob->{"write_access"} = $write_access
	if (defined($write_access));
295 296 297 298 299

    my $dataset = APT_Dataset->Create($blob);
    if (!defined($dataset)) {
	fatal("Internal error creating dataset object");
    }
300 301 302 303 304 305 306 307 308
    # Now we can create.
    if (defined($webtask_id)) {
	$webtask = WebTask->Create($dataset->uuid(), $webtask_id);
	if (defined($webtask)) {
	    # Convenient.
	    $webtask->AutoStore(1);
	}
    }
    
309 310 311 312 313 314 315 316
    # new dataset is returned locked. If we have instance, try to lock
    # that now, else its a failure.
    if ($type eq "imdataset" && defined($instance)) {
	if ($instance->Lock()) {
	    $errmsg = "Instance is busy, cannot snapshot data";
	    goto failed;
	}
    }
317 318 319 320 321 322 323
    
    #
    # Ask the aggregate to create the dataset. 
    #
    my $response = $dataset->CreateDataset();
    if ($response->code() != GENIRESPONSE_SUCCESS) {
	$errmsg = "CreateDataset failed: ". $response->output() . "\n";
324 325
	$instance->Unlock()
	    if (defined($instance));
326 327 328
	goto failed;
    }
    $blob = $response->value();
329 330
    $dataset->Update({"remote_uuid" => $blob->{"uuid"},
		      "remote_urn"  => $blob->{"urn"}});
331 332 333
    if (exists($blob->{'url'}) && $blob->{'url'} ne "") {
	$dataset->Update({"remote_url" => $blob->{"url"}});
    }
334

335 336 337 338 339 340 341 342 343 344 345
    #
    # Okay, this is silly; there is no distinct state for resource allocation.
    # It is unapproved and locked. The other side tells us its locked in the
    # blob (busy), so look for this and set the state to busy. Then we poll
    # waiting for the lease to go nonbusy and approved. Ick.
    #
    if ($blob->{"busy"}) {
	$dataset->Update({"state" => "busy"});
    }
    else {
	$dataset->Update({"state" => $blob->{"state"}});
346 347 348 349
	if ($type ne "imdataset" || !defined($instance)) {
	    $dataset->Unlock();
	    return 0;
	}
350
    }
351 352 353 354
    #
    # Handoff to snapshot if an imdataset.
    #
    if ($type eq "imdataset" &&
355
	DoSnapShotInternal($dataset, $aggregate,
356 357 358 359
			   $bsname, $nodeid, \$errmsg)) {
	$instance->Unlock();
	goto failed;
    }
360 361 362
    if (PollDatasetStatus($dataset, \$errmsg)) {
	# Exit and let child poll
	exit(0);
363 364
    }
    $dataset->Unlock();
365
    $instance->Unlock() if (defined($instance));
366 367 368 369 370 371 372 373 374 375 376 377 378 379
    return 0;

  failed:
    $dataset->Delete()
	if (defined($dataset));
    # This will set the webtask, see below.
    fatal($errmsg);
}

#
# Delete
#
sub DoDelete()
{
380
    my $errmsg = "Could not delete dataset";
381 382 383 384 385 386 387 388 389 390 391 392 393
    
    if (@ARGV != 1) {
	fatal("usage: $0 delete pid/name");
    }
    my $token   = shift(@ARGV);
    my $dataset = APT_Dataset->Lookup($token);
    if (!defined($dataset)) {
	fatal("No such dataset");
    }
    if ($dataset->Lock()) {
	fatal("dataset is busy, cannot lock it");
    }
    my $response = $dataset->DeleteDataset();
Leigh Stoller's avatar
Leigh Stoller committed
394 395
    if ($response->code() != GENIRESPONSE_SUCCESS &&
	$response->code() != GENIRESPONSE_SEARCHFAILED) {
396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443
	$errmsg = "DeleteDataset failed: ". $response->output() . "\n";
	goto failed;
    }
    $dataset->Delete();
    return 0;

  failed:
    $dataset->Unlock();
    # This will set the webtask, see below.
    fatal($errmsg);
}

#
# Refresh
#
sub DoRefresh()
{
    my $errmsg;
    
    if (@ARGV != 1) {
	fatal("usage: $0 refresh pid/name");
    }
    my $token   = shift(@ARGV);
    my $dataset = APT_Dataset->Lookup($token);
    if (!defined($dataset)) {
	fatal("No such dataset");
    }
    if ($dataset->Lock()) {
	fatal("dataset is busy, cannot lock it");
    }
    if (DoRefreshInternal($dataset, \$errmsg)) {
	goto failed;
    }
    $dataset->Unlock();
    return 0;

  failed:
    $dataset->Unlock();
    # This will set the webtask, see below.
    fatal($errmsg);
}

sub DoRefreshInternal($$)
{
    my ($dataset, $pmesg) = @_;
    
    my $response = $dataset->DescribeDataset();
    if ($response->code() != GENIRESPONSE_SUCCESS) {
444
	if ($response->code() == GENIRESPONSE_SEARCHFAILED) {
445 446 447 448 449
	    $$pmesg = "Dataset no longer exists at the target\n";
	}
	else {
	    $$pmesg = "DescribeDataset failed: ". $response->output() . "\n";
	}
450 451 452
	return -1;
    }
    my $blob = $response->value();
453 454
    print STDERR Dumper($blob);
    
455 456 457 458 459
    $dataset->Update({"last_used" => TBDateStringLocal($blob->{"lastused"}),
		      "expires"   => TBDateStringLocal($blob->{"expires"})});

    if ($blob->{"busy"}) {
	$dataset->Update({"state" => "busy"});
460 461 462 463 464 465 466 467
	if ($dataset->type() eq "imdataset") {
	    if (defined($webtask)) {
		$webtask->image_size($blob->{'image_size'}) 	
		    if (exists($blob->{'image_size'}));
		$webtask->image_status($blob->{'image_status'})
		    if (exists($blob->{'image_status'}));
	    }
	}
468 469 470
    }
    else {
	$dataset->Update({"state" => $blob->{"state"}});
471 472
	if ($dataset->type() eq "imdataset") {
	    $dataset->Update({"size" => $blob->{"size"}});
473 474 475 476 477 478
	    if (defined($webtask)) {
		$webtask->image_size($blob->{'image_size'}) 	
		    if (exists($blob->{'image_size'}));
		$webtask->image_status($blob->{'image_status'})
		    if (exists($blob->{'image_status'}));
	    }
479
	}
480
    }
481 482 483
    return 0;
}

484 485 486 487 488 489 490 491 492
#
# Modify
#
sub DoModify()
{
    my $errmsg;
    
    my $usage = sub {
	print STDERR "Usage: manage_dataset modify ".
493
	    "[-R global|project] [-W creator|project] pid/name\n";
494 495
	exit(-1);
    };
496
    my $optlist = "R:W:";
497 498 499 500 501 502 503 504 505 506 507 508
    my %options = ();
    if (! getopts($optlist, \%options)) {
	&$usage();
    }
    if (@ARGV != 1) {
	&$usage();
    }
    my $token   = shift(@ARGV);
    my $dataset = APT_Dataset->Lookup($token);
    if (!defined($dataset)) {
	fatal("No such dataset");
    }
509 510 511
    my $blob = {};
    if (defined($options{"R"})) {
	my $read_access = $options{"R"};
512
	&$usage()
513 514
	    if ($read_access !~ /^(global|project)$/);
	$blob->{'read_access'} = $read_access;
515
    }
516 517 518 519 520
    if (defined($options{"W"})) {
	my $write_access = $options{"W"};
	&$usage()
	    if ($write_access !~ /^(creator|project)$/);
	$blob->{'write_access'} = $write_access;
521 522 523 524
    }
    if ($dataset->Lock()) {
	fatal("dataset is busy, cannot lock it");
    }
525 526
    if (keys(%$blob)) {
	if ($dataset->Update($blob)) {
527 528 529 530 531 532 533 534 535 536 537 538 539 540
	    $errmsg = "Could not update privacy settings!";
	    goto failed;
	}
    }
    my $response = $dataset->ModifyDataset();
    if ($response->code() != GENIRESPONSE_SUCCESS) {
	if ($response->code() == GENIRESPONSE_SEARCHFAILED) {
	    $errmsg = "Dataset no longer exists at the target\n";
	}
	else {
	    $errmsg = "ModifyDataset failed: ". $response->output() . "\n";
	}
	goto failed;
    }
541
    $blob = $response->value();
542 543 544
    if ($dataset->type() ne "imdataset") {
	$dataset->Update({"expires" => TBDateStringLocal($blob->{"expires"})});
    }
545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587
    $dataset->Unlock();
    return 0;

  failed:
    $dataset->Unlock();
    # This will set the webtask, see below.
    fatal($errmsg);
}

#
# Extend
#
sub DoExtend()
{
    my $errmsg;
    
    my $usage = sub {
	print STDERR "Usage: manage_dataset extend pid/name\n";
	exit(-1);
    };
    if (@ARGV != 1) {
	&$usage();
    }
    my $token   = shift(@ARGV);
    my $dataset = APT_Dataset->Lookup($token);
    if (!defined($dataset)) {
	fatal("No such dataset");
    }
    if ($dataset->Lock()) {
	fatal("dataset is busy, cannot lock it");
    }
    my $response = $dataset->ExtendDataset();
    if ($response->code() != GENIRESPONSE_SUCCESS) {
	if ($response->code() == GENIRESPONSE_SEARCHFAILED) {
	    $errmsg = "Dataset no longer exists at the target\n";
	}
	else {
	    $errmsg = "ExtendDataset failed: ". $response->output() . "\n";
	}
	goto failed;
    }
    my $blob = $response->value();
    $dataset->Update({"expires" => TBDateStringLocal($blob->{"expires"})});
588 589 590
    if (exists($blob->{'state'})) {
	$dataset->Update({"state" => $blob->{'state'}});
    }
591 592 593 594 595 596 597 598 599
    $dataset->Unlock();
    return 0;

  failed:
    $dataset->Unlock();
    # This will set the webtask, see below.
    fatal($errmsg);
}

600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627
#
# Snapshot an image backed dataset
#
sub DoSnapshot()
{
    my $errmsg;
    
    my $usage = sub {
	print STDERR "Usage: manage_dataset snapshot ".
	    "-i instance -b bsname pid/name nodeid\n";
	exit(-1);
    };
    my $optlist = "b:i:";
    my %options = ();
    if (! getopts($optlist, \%options)) {
	&$usage();
    }
    &$usage()
	if (! (@ARGV == 2 && exists($options{"b"}) && exists($options{"i"})));
    
    my $bsname  = $options{"b"};
    my $token   = shift(@ARGV);
    my $nodeid  = shift(@ARGV);
    my $dataset = APT_Dataset->Lookup($token);
    if (!defined($dataset)) {
	fatal("No such dataset");
    }
    if ($dataset->type() ne "imdataset") {
628
	fatal("Only image backed datasets supported");
629 630 631
    }
    my $instance = APT_Instance->Lookup($options{"i"});
    if (!defined($instance)) {
632 633
	fatal("No such instance");
    }
634 635 636 637
    my $aggregate = $instance->FindAggregateByNodeId($nodeid);
    if (!defined($aggregate)) {
	fatal("Could not find aggregate for $nodeid");
    }
638 639
    if ($dataset->Lock()) {
	fatal("dataset is busy, cannot lock it");
640 641 642 643 644 645 646
    }
    if ($instance->Lock()) {
	# undef so we do not try to unlock it below.
	$instance = undef;
	$errmsg = "instance is busy, cannot lock it";
	goto failed
    }
647
    # Create a webtask for the caller, might be ignored but thats okay.
Leigh Stoller's avatar
Leigh Stoller committed
648
    $webtask = WebTask->Create($dataset->uuid(), $webtask_id);
649 650 651 652
    if (defined($webtask)) {
	# Convenient.
	$webtask->AutoStore(1);
    }
653
    if (DoSnapShotInternal($dataset, $aggregate, $bsname, $nodeid, \$errmsg)) {
654 655
	goto failed;
    }
656 657 658 659
    if (PollDatasetStatus($dataset, \$errmsg)) {
	# Exit and let child poll
	exit(0);
    }
660 661 662 663 664 665 666 667 668 669 670 671 672
    $instance->Unlock();
    $dataset->Unlock();
    return 0;
    
  failed:
    $instance->Unlock() if (defined($instance));
    $dataset->Unlock();
    # This will set the webtask, see below.
    fatal($errmsg);
}

sub DoSnapShotInternal($$$$$)
{
673
    my ($dataset, $aggregate, $bsname, $nodeid, $perrmsg) = @_;
674 675
    my $errmsg;
    
676
    my $manifest = GeniXML::Parse($aggregate->manifest());
677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710
    if (! defined($manifest)) {
	$errmsg = "Could not parse manifest";
	goto failed;
    }
    my $sliver_urn;
    my @nodes = GeniXML::FindNodes("n:node", $manifest)->get_nodelist();
    foreach my $node (@nodes) {
	my $client_id = GeniXML::GetVirtualId($node);
	if ($nodeid eq $client_id) {
	    $sliver_urn = GeniXML::GetSliverId($node);
	    #
	    # But check that the bsname is on this node.
	    #
	    my $found = 0;
	    foreach my $blockref
		(GeniXML::FindNodesNS("n:blockstore", $node,
				      $GeniXML::EMULAB_NS)->get_nodelist()) {
		    my $name = GeniXML::GetText("name", $blockref);
		    if ($name eq $bsname) {
			$found = 1;
			last;
		    }
	    }
	    if (!$found) {
		$errmsg = "No such blockstore $bsname on node $nodeid";
		goto failed;
	    }
	    last;
	}
    }
    if (!defined($sliver_urn)) {
	$errmsg = "Could not find node '$nodeid' in manifest";
	goto failed;
    }
711
    my $response = $aggregate->CreateImage($sliver_urn,
712 713
					   $dataset->dataset_id(),
					   0, undef, $bsname);
714 715 716 717 718 719
    if ($response->code() != GENIRESPONSE_SUCCESS) {
	$errmsg = "SnapshotDataset failed: ". $response->output() . "\n";
	goto failed;
    }
    $dataset->Update({"state" => "busy"});
    return 0;
720

721
  failed:
722 723
    $$perrmsg = $errmsg;
    return -1;
724
}
725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767

#
# Poll for snapshot status.
#
sub PollDatasetStatus($$)
{
    my ($dataset, $perrmsg) = @_;
    my $project = $dataset->GetProject();
    my $dname   = $dataset->dataset_id();
    my $logfile;

    #
    # If busy, then allocation is in progress. We leave it locked and
    # poll in the background for a while, hoping for it to eventually
    # stop being busy. Eventually might have to replace this, since
    # polling got any non-small length of time will lead to trouble.
    #
    if (! $debug) {
        $logfile = TBMakeLogname("createdataset");

	if (my $childpid = TBBackGround($logfile)) {
	    return $childpid;
	}
	# Let parent exit;
	sleep(2);
    }
    $webtask->SetProcessID($PID)
	if (defined($webtask));

    my $seconds  = 1200;
    my $interval = 5;
    
    while ($seconds > 0) {
	$seconds -= $interval;
	if (DoRefreshInternal($dataset, $perrmsg)) {
	    print STDERR $$perrmsg;
	    sleep($interval);
	    next;
	}
	if ($dataset->state() eq "valid") {
	    $project->SendEmail($this_user->email(),
			"Your dataset is now ready to use",
			"Dataset '$dname' is now allocated and ready to use.\n",
768
				$project->LogsEmailAddress(), undef, $logfile);
769 770 771 772 773 774 775 776 777
	    $webtask->Exited(0)
		if (defined($webtask));
	    last;
	}
	sleep($interval);
    }
    $webtask->Exited(-1)
	if (defined($webtask) && $seconds <= 0);
    
Leigh Stoller's avatar
Leigh Stoller committed
778 779
    unlink($logfile)
	if (defined($logfile));
780 781 782
    return 0;
}

783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804
sub fatal($)
{
    my ($mesg) = @_;

    if (defined($webtask)) {
	$webtask->output($mesg);
	$webtask->Exited(-1);
    }
    print STDERR "*** $0:\n".
	         "    $mesg\n";
    # Exit with negative status so web interface treats it as system error.
    exit(-1);
}

sub escapeshellarg($)
{
    my ($str) = @_;

    $str =~ s/[^[:alnum:]]/\\$&/g;
    return $str;
}