assign_wrapper.in 29.8 KB
Newer Older
Leigh B. Stoller's avatar
Leigh B. Stoller committed
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
#!/usr/bin/perl -w

# This function as the main assign loop.  It converts the virtual
# topology into a top input including LAN and delay translation.  It
# then snapshots the current testbed physical state and runs assign,
# looping a couple times if assign fails.  When assign successfully
# completes it will interpret the results.  Attempt to match any
# existing portmap entries and then update the delays and vlans table.

# Syntax: assign_wrapper <pid> <eid>

# Caveats:
#  The support for direct and interswitch links has not been testbed much.

# Settings
# delaythresh is the maximum delay in ms above which a delay node is needed.
# maxrun is maximum number of times we run assign.
18
19
# delaywithswitch if 1 will use the switch to delay when possible.  Currently
#  this only works for 10mbit links.
Leigh B. Stoller's avatar
Leigh B. Stoller committed
20
$delaythresh = 3;
21
$maxrun = 20;
22
$delaywithswitch=0;
Leigh B. Stoller's avatar
Leigh B. Stoller committed
23

24
$DELAYCAPACITY = @DELAYCAPACITY@;
Leigh B. Stoller's avatar
Leigh B. Stoller committed
25
$TBROOT = "@prefix@";
26
$ENV{'PATH'} = "/usr/bin:$TBROOT/libexec:$TBROOT/sbin:$TBROOT/bin";
27

28
29
use lib '@prefix@/lib';
use libdb;
30
require exitonwarn;
Leigh B. Stoller's avatar
Leigh B. Stoller committed
31

32
33
34
35
36
#
# Turn off line buffering on output
#
$| = 1;

37
38
39
40
41
42
43
44
45
use Getopt::Std;

getopts('v',\%opt);

sub usage {
	print "Usage: $0 [-v] pid eid\n";
	print "		-v enables verbose output\n";
	return 1;
}
Leigh B. Stoller's avatar
Leigh B. Stoller committed
46
47

$verbose = 0;
48
49
50
51
52
53
if ($opt{v}) {
	$verbose = 1;
}

if (@ARGV != 2) {
	exit &usage();
Leigh B. Stoller's avatar
Leigh B. Stoller committed
54
}
55

Leigh B. Stoller's avatar
Leigh B. Stoller committed
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
($pid,$eid) = @ARGV;

$ptopfile = "$pid-$eid-$$.ptop";

sub printdb {
    if ($verbose) {
	print $_[0];
    }
};

######################################################################
# Step 1 - Setup virtual topology
#
# Here we need to read the virtual topology in from the virt_nodes
# and virt_lans table.  We then need to add delay and lan nodes as
# necessary.
#
# Conversion details:
#   Let L be a LAN with N members.
#   If N == 2 
#      Let N1 be node 1
#      Let N2 be node 2
#      If L is delayed
#         Generate delay node D
#         Link N1 to D
#         Link N2 to D
#      Else
#         Link N1 to N2
#   Else
#      Generate lan node A
#      If L is delayed
#        Foreach node N in L
#           Generate delay node DN
#           Link A to DN
#           Link N to DN
#      Else
#        Foreach node N in L
#           Link N to A
#
# Datastructures:
#  nodes is indexed by virtual node and contains the node type.
#  nodelans is indexed by virtual node and contains a list of
#    <port>:<lan> that it is connected to.
#  ips is indexed by nodeport and contains the IP addresses.
#  lans is indexed by virtual lan and is a list of nodeport members.
#  delayinfo is indexed by virtual lan:node:port and is a list of delay,
#    bandwidth, lossrate.
#  okbandwidths is indexed by bandwidth and is just a set.
#  lannodes is indexed by physical name is the set of lan nodes.
#  interfacespeed is indexed by type and contains the bandwidth.
#  delaynodes is indexed by link name and contains [delay,bw,loss]
107
108
109
110
#  portbw is indexed by virtual nodeport and contains the bandwidth
#    of that port.  Note that the bandwidth of a port is one of 100
#    or 10.  For LANs with other bandwidths the port speed will be
#    100 and a delay node will be inserted.
Leigh B. Stoller's avatar
Leigh B. Stoller committed
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
#
# Delay node names:
#  delay nodes are named tbdelayXX N > 2
#   and tbsdelayXX for N == 2.
# 
# Lan node nameS:
#  lan nodes are named lan/<virtual lan>
######################################################################

# Shark Hack
# For each LAN we replace all the sharks in the LAN with a single
# shark shelf node.  After this goes through assign we pull them
# all back out.
#
# sharkshelves is indexed by virtual shelf name and is a list of
# the virtual nodes in it.
# sharkshelfid is used to generate ids for shark shelves.
$sharkshelfid = 0;

# delayid is used to generate ids for delay nodes.
$delayid = 0;

printdb "Generating TOP file.\n";

# Let's figure out what kind of links we have.
printdb "Finding interface speeds:";
137
138
my $result = DBQueryFatal("SELECT type,max_speed from interface_types");
while (($type,$bandwidth) = $result->fetchrow_array) {
Leigh B. Stoller's avatar
Leigh B. Stoller committed
139
140
141
142
    $okbandwidths{$bandwidth} = 1;
    $interfacespeed{$type} = $bandwidth;
    printdb " $bandwidth";
}
143
$result->finish;
Leigh B. Stoller's avatar
Leigh B. Stoller committed
144
145
146
printdb "\n";

printdb "Loading virt_nodes.\n";
147
$result = DBQueryFatal("SELECT vname,ips,type from virt_nodes" .
Leigh B. Stoller's avatar
Leigh B. Stoller committed
148
		     " where pid=\"$pid\" and eid=\"$eid\"");
149
while (($vname,$ips,$type) = $result->fetchrow_array) {
Leigh B. Stoller's avatar
Leigh B. Stoller committed
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
    printdb "  $vname $type $ips\n";
    # We need to check the names to make sure they won't clash with
    # our internal delay node names.
    if (($vname =~ /^tbdelay\d+/) ||
	($vname =~ /^tbsdelay\d+/)) {
	print STDERR "Warning: $vname is a reserved name.  Working around.\n";
	($num) = ($vname =~ /(\d+)/);
	$delayid = $num + 1;
    }
    $nodes{$vname} = $type;
    $nodelans{$vname} = [];
    foreach $ipinfo (split(" ",$ips)) {
	($port,$ip) = split(":",$ipinfo);
	$ips{"$vname:$port"} = $ip;
    }
}
166
$result->finish;
Leigh B. Stoller's avatar
Leigh B. Stoller committed
167
168

printdb "Loading virt_lans.\n";
169
$result = DBQueryFatal("SELECT vname,member,delay,bandwidth,lossrate" .
Leigh B. Stoller's avatar
Leigh B. Stoller committed
170
		     " from virt_lans where pid=\"$pid\" and eid=\"$eid\"");
171
while (($vname,$member,$delay,$bandwidth,$lossrate) = $result->fetchrow_array) {
Leigh B. Stoller's avatar
Leigh B. Stoller committed
172
173
174
175
176
177
    if (! defined($lans{$vname})) {
	$lans{$vname} = [];
    }
    push(@{$lans{$vname}},$member);
    $delayinfo{"$vname:$member"} = [$delay,$bandwidth,$lossrate];
    ($node,$port) = split(":",$member);
178
179
180
181
182
    if ($bandwidth == 10) {
	$portbw{$member} = 10;
    } else {
	$portbw{$member} = 100;
    }
Leigh B. Stoller's avatar
Leigh B. Stoller committed
183
    push(@{$nodelans{$node}},"$port:$vname");
184
    printdb "  portbw of $member = $portbw{$member}\n";
Leigh B. Stoller's avatar
Leigh B. Stoller committed
185
186
187
    printdb "  $vname $member - $delay $bandwidth $lossrate\n";
    printdb "    Added $port:$vname to nodelans of $node\n";
}
188
$result->finish;
Leigh B. Stoller's avatar
Leigh B. Stoller committed
189
190
191
192
193
194
195
196

# Shark hack
foreach $lan (keys(%lans)) {
    $realmembers = [];
    $sharks = [];
    $hassharks = 0;
    foreach $member (@{$lans{$lan}}) {
	($node) = (split(":",$member))[0];
197
	if (($nodes{$node} eq "shark") || ($nodes{$node} eq "dnard")) {
Leigh B. Stoller's avatar
Leigh B. Stoller committed
198
199
200
201
202
203
204
205
206
207
208
209
	    push(@$sharks,$member);
	    $hassharks = 1;
	} else {
	    push(@$realmembers,$member);
	}
    }
    if ($hassharks) {
	$shelfid = "sharkshelf$sharkshelfid";
	printdb "  Creating shark shelf: $shelfid (" . 
	    join(" ",@$sharks) . ")\n";
	$sharkshelfid++;
	$sharkshelves{$shelfid} = $sharks;
210
	$delayinfo{"$lan:$shelfid:uplink"} = [0,100,0.0];
Leigh B. Stoller's avatar
Leigh B. Stoller committed
211
212
213
214
215
216
217
218
219
220
	push(@$realmembers,"$shelfid:uplink");
	$nodes{$shelfid} = "shark-shelf";
    }
    $lans{$lan} = $realmembers;
}
# End shark hack

# Open the TOP file
$topfile = "$pid-$eid-$$.top";
open(TOPFILE,"> $topfile") || do {
221
    print STDERR "$0: *** Could not open $topfile.\n";
Leigh B. Stoller's avatar
Leigh B. Stoller committed
222
223
224
    exit(1);
};

225
226
227
228

$nodes=0;
$delaynodes=0;

Leigh B. Stoller's avatar
Leigh B. Stoller committed
229
230
foreach $node (keys(%nodes)) {
    # Shark hack
231
    if (($nodes{$node} ne "shark") && ($nodes{$node} ne "dnard")) {
Leigh B. Stoller's avatar
Leigh B. Stoller committed
232
	print TOPFILE "node $node $nodes{$node}\n";
233
234
235
	if ($nodes{$node} ne "shark-shelf") {
	    $nodes++;
	}
Leigh B. Stoller's avatar
Leigh B. Stoller committed
236
237
238
239
240
241
    }
    # End Shark hack
}

foreach $lan (keys(%lans)) {
    @members = @{$lans{$lan}};
242
    printdb "$lan - " . join(" ",@members) . "\n";
243
244
245
246
247
248
249
250
251
252
253
    # Shark hack for rvr
    $sharks = 0;
    $nonsharks = 0;
    foreach $member (@members) {
	($node) = (split(":",$member))[0];
	if ($nodes{$node} eq "shark-shelf") {
	    $sharks++;
	} else {
	    $nonsharks++;
	}
    }
Leigh B. Stoller's avatar
Leigh B. Stoller committed
254
255
256
257
258
259
    if ($#members == 1) {
	($nodeport0,$nodeport1) = @members;
	$node0 = (split(":",$nodeport0))[0];
	$node1 = (split(":",$nodeport1))[0];
	($delay0,$bw0,$loss0) = @{$delayinfo{"$lan:$nodeport0"}};
	($delay1,$bw1,$loss1) = @{$delayinfo{"$lan:$nodeport1"}};
260
261
	$delay = $delay0+$delay1;
	$loss = 1-(1-$loss0)*(1-$loss1);
262
	$bw = &min($bw0,$bw1);
Leigh B. Stoller's avatar
Leigh B. Stoller committed
263
	$bandwidth = &getbandwidth(&min($bw0,$bw1));
264
	if (($delay > $delaythresh) ||
265
	    (($bw != 100) && ($bw != 10)) ||
266
267
	    (($delaywithswitch == 0) && 
	     (($bw != 100) && (($sharks == 0) || ($nonsharks > 1)))) || 
268
	    ($loss != 0)) {
Leigh B. Stoller's avatar
Leigh B. Stoller committed
269
	    $delayname = "tbsdelay$delayid";
270
	    $delaynodes{"linksdelaysrc/$lan"} = [$delay,$bw,$loss];
Leigh B. Stoller's avatar
Leigh B. Stoller committed
271
272
273
274
	    printdb "Delay node linksdelaysrc/$lan ($delayname) = " . 
		join(" ",@{$delaynodes{"linksdelaysrc/$lan"}}) . "\n";
	    $delayid++;
	    print TOPFILE "node $delayname delay\n";
275
	    $delaynodes++;
Leigh B. Stoller's avatar
Leigh B. Stoller committed
276
277
278
279
280
281
282
	    print TOPFILE "link linksdelaysrc/$lan $node0 $delayname"
		. " $bandwidth\n";
	    print TOPFILE "link linksdelaydst/$lan $node1 $delayname"
		. " $bandwidth\n";
	} else {
	    print TOPFILE "link linksimple/$lan $node0 $node1 $bandwidth\n";
	}
283
    } elsif ($#members != 0) {
Leigh B. Stoller's avatar
Leigh B. Stoller committed
284
285
286
287
288
289
	print TOPFILE "node lan/$lan lan\n";
	$lannodes{"lan/$lan"} = 1;
	foreach $member (@members) {
	    ($delay,$bw,$loss) = @{$delayinfo{"$lan:$member"}};
	    $bandwidth = &getbandwidth($bw);
	    ($node) = (split(":",$member))[0];
290
291
# XXX The expression below should be modified for better bandwidth support.
# Probably needs to happen post assign somehow.
Leigh B. Stoller's avatar
Leigh B. Stoller committed
292
	    if (($delay > $delaythresh) ||
293
		(($bw != 100) && ($bw != 10))  ||
294
295
		(($delaywithswitch == 0) && 
		 (($bw != 100) && (($sharks == 0) || ($nonsharks > 1)))) || 
Leigh B. Stoller's avatar
Leigh B. Stoller committed
296
297
298
299
300
301
302
		($loss != 0)) {
		$delayname = "tbdelay$delayid";
		$delaynodes{"linkdelaysrc/$lan/$member"} = [$delay,$bw,$loss];
		printdb "Delay node linkdelaysrc/$lan/$member ($delayname) " .
		    " = " . join(" ",@{$delaynodes{"linkdelaysrc/$lan/$member"}}) . "\n";
		$delayid++;
		print TOPFILE "node $delayname delay\n";
303
		$delaynodes++;
Leigh B. Stoller's avatar
Leigh B. Stoller committed
304
305
306
307
308
309
310
311
312
313
		print TOPFILE "link linkdelaysrc/$lan/$member" .
		    " $node $delayname $bandwidth\n";
		print TOPFILE "link linkdelaydst/$lan/$member" .
		    " lan/$lan $delayname $bandwidth\n";
	    } else {
		print TOPFILE "link linklan/$lan/$member $node lan/$lan" .
		    " $bandwidth\n";
	    }
	}
    }
314
    # If a LAN has only one member we don't do anything.
Leigh B. Stoller's avatar
Leigh B. Stoller committed
315
316
317
318
}

close TOPFILE;

319
320
321
# Set estimations
$minimum_nodes = $nodes + $delaynodes/$DELAYCAPACITY;
$maximum_nodes = $nodes + $delaynodes;
322
DBQueryFatal("UPDATE experiments set maximum_nodes=$maximum_nodes, " .
323
324
325
326
	 "minimum_nodes=$minimum_nodes where pid=\"$pid\" and eid=\"$eid\"");
print "Minumum nodes = $minimum_nodes\n";
print "Maximum nodes = $maximum_nodes\n";

Leigh B. Stoller's avatar
Leigh B. Stoller committed
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
######################################################################
# Step 2 - Assign Loop
# 
# Here we loop up to maxrun times.  In each loop we snapshot the
# current testbed state into a ptop file.  We then run assign.  If
# assign succeeds we attempt to reserve the resources.  If that works
# we're done with step 2 otherwise we loop again.
#
# v2pmap is indexed by virtual and contains the physical node.
# p2vmap is indexed by physical and contains the virtual node
# plinks is indexed by virtual name and contains 
#  (pnodeportA,pnodeportB) .  If one is a delay node it is always
#  the second.
#######################################################################

$currentrun = 1;
while (1) {
    print "Assign Run $currentrun\n";

    # Violation counts
    $linkusers = -1;
    $bandwidth = -1;
    $desires = -1;

    # Clear v2pmap, p2vmap, and plinks
    undef %v2pmap;
    undef %p2vmap;
    undef %plinks;

    # Snapshot
357
    system("ptopgen > $ptopfile");
Leigh B. Stoller's avatar
Leigh B. Stoller committed
358
359

    # Get number of nodes
360
361
    my $numnodes_result = 
	DBQueryFatal("select a.node_id,a.type from" .
Leigh B. Stoller's avatar
Leigh B. Stoller committed
362
363
364
		     " nodes as a left join reserved as b" .
		     " on a.node_id=b.node_id" .
		     " where b.node_id is null" .
365
		     " and a.role='testnode' and a.type!='dnard'");
366
    $numnodes = $numnodes_result->numrows;
Leigh B. Stoller's avatar
Leigh B. Stoller committed
367
368
    
    if ($numnodes < $minimum_nodes) {
369
	print STDERR "$0: *** Insufficient nodes available.\n";
Leigh B. Stoller's avatar
Leigh B. Stoller committed
370
371
372
373
374
375
	exit(2);
    }

    # Run assign
    $fail = 0;
    print "assign -b -t $ptopfile $topfile\n";
376
    open(ASSIGNFP,"assign -b -t $ptopfile $topfile | tee assign.log |");
Leigh B. Stoller's avatar
Leigh B. Stoller committed
377
378
379
380
381
382
383
384
    $violations = 0;
    $score = -1;

    # read output
    # Header
    printdb "Reading assign results.\n";
    while (<ASSIGNFP>) {
	chop;
385
386
387
388
	/No physical nodes of type (.+)$/ && do {
	    $score=-2;
	    print $_ . "\n";
	};
Leigh B. Stoller's avatar
Leigh B. Stoller committed
389
390
391
392
393
394
	/^With ([0-9]+) violations$/ && do {
	    $violations = $1;
	    last;
	};
	/^[ \t]+BEST SCORE: [ \t]+([0-9]+\.[0-9]+)/ && ($score=$1);
    }
395
396
397
398
399
    if ($score == -2) {
	# Type error
	print "Giving up.\n";
	exit(2);
    }
Leigh B. Stoller's avatar
Leigh B. Stoller committed
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
    printdb "Found score $score, violations $violations.\n";

    # We don't bother reading anything else if violations occured.
    if (($violations == 0) && ($score != -1)) {
	# read nodes section
	while (<ASSIGNFP> !~ /^Nodes:/) {}
	printdb "Nodes:\n";
	while (<ASSIGNFP>) {
	    chop;
	    /^End Nodes$/ && last;
	    @info = split;
	    ($virtual,$physical) = @info[0,2];
	    $v2pmap{$virtual} = $physical;
	    $p2vmap{$physical} = $virtual;
	    printdb "  $virtual $physical\n";
	}

	# read Edges
	# By convention, in plinks, the delay node is always the second
	# entry.
	while (<ASSIGNFP> !~ /^Edges:/) {}
	printdb "Edges:\n";
	while (<ASSIGNFP>) {
	    /^End Edges$/ && last;
	    @info = split;
	    $line = $_;
	    $_ = $info[1]; # type
	  SWITCH1: {
	      /^intraswitch$/ && do {
		  ($vlink,$rawA,$rawB) = @info[0,3,5];
		  last SWITCH1;
	      };
	      /^interswitch$/ && do {
433
434
		  ($vlink,$rawA,$rawB) = @info[0,3,$#info];
		  last SWITCH1;
Leigh B. Stoller's avatar
Leigh B. Stoller committed
435
436
	      };
	      /^direct$/ && do {
437
		  print STDERR "$0: *** Unsupported link type: direct.\n";
438
		  exit(1);
Leigh B. Stoller's avatar
Leigh B. Stoller committed
439
440
441
	      };
	      print "Found garbage: $line\n";
	  }
442
443
444
445
446
447
448
449
450
	    $nodeportA = &getnodeport($rawA);
	    $nodeportB = &getnodeport($rawB);
	    $nodeportA =~ s/\//:/;
	    $nodeportB =~ s/\//:/;
	    if (&isdelay($nodeportB)) {
		$plinks{$vlink} = [$nodeportA,$nodeportB];
	    } else {
		$plinks{$vlink} = [$nodeportB,$nodeportA];
	    }
Leigh B. Stoller's avatar
Leigh B. Stoller committed
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
	    printdb "  $vlink " . join(" ",@{$plinks{$vlink}}) . "\n";
	}
    } else {
	# spit out up to nodes
	print "ASSIGN FAILED:\n";       
	while (<ASSIGNFP>) {
	    if (/link_users: (\d+)$/) {
		$linkusers = $1;
	    } elsif (/bandwidth: (\d+)$/) {
		$bandwidth = $1;
	    } elsif (/desires: (\d+)$/) {
		$desires = $1;
	    }
	    if (/^Nodes:/) {last;}
	    print "$_";
	}
	$fail = 1;
    }
    while (<ASSIGNFP>) { } # Read anything left in the pipe before closing
    close(ASSIGNFP);

    # Reserve resources
    if ($fail == 0) {
	print "Reserving resources.\n";
	@toreserve = ();
	# We don't reserve LAN nodes.
	foreach $node (keys(%p2vmap)) { 
	    if (! defined($lannodes{$p2vmap{$node}})) {
		push(@toreserve,$node);
	    }
	}
	if (system("nalloc $pid $eid " . join(" ",@toreserve))) {
	    print "Failed to reserve resources.  Trying again.\n";
	} else {
	    print "Successfully reserved resources.  Finishing setup.\n";
	    last;
	}
    }

    # Check for exit
    if ($currentrun >= $maxrun) {
	$exitcode = 1;
	if ($bandwidth > 0) {
	    $exitcode += 4;
	} 
	if ($linkusers > 0) {
	    $exitcode += 8;
	}
	if ($desires > 0) {
	    $exitcode += 16;
	}
502
	print "$0: *** Reached run limit.  Giving up.\n";
Leigh B. Stoller's avatar
Leigh B. Stoller committed
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
	exit($exitcode);
    }
    $currentrun++;
}


######################################################################
# Step 3 - Convert to vlans, delays, and portmap
# 
# Here we convert the plinks into vlans, delays, and portmap.  We
# convert them first into internal datastructure.  After Step 4
# when we do some port swapping we'll upload the modified versions
# of these structures into the database.
#
# vlans is indexed by an internal ID contains:
#  [vname, members]
# delays is indexed by an internal ID and contains:
#  [pnode, int0, int1, vname, delay, bandwidth, lossrate]
# portmap is indexed by <virtual node>:<virtual port> and contains
#  the physical port.
# nodevlans is indexed by physical node and contains the VLANs
#  it's interfaces are in.  It does not contain entries for delay
#  nodes.
#
# vlan ids
#  vlan ids are increasing integers in the case of node<->delay connections.
#  In the case of actual LANs either of real node or of delay nodes
#  they are indexed by virtual lan name.
# delay ids
#  delay ids are increasing integers.  We could have used a list of
# delays just as well.  Having it as an array may prove useful for
# future changes however.
######################################################################

$vlanid = 0;
$delayid = 0;
foreach $pnode (keys(%p2vmap)) {
    $nodevlans{$pnode} = [];
}

printdb "Interpreting results.\n";
foreach $plink (keys(%plinks)) {
    ($nodeportA,$nodeportB) = @{$plinks{$plink}};
    ($nodeA,$portA) = split(":",$nodeportA);
    ($nodeB,$portB) = split(":",$nodeportB);
    printdb "plink $plink - $nodeportA $nodeportB\n";
    if (($lan) = ($plink =~ m|^linksdelaysrc/(.+)$|)) {
	# Node has a single entry in lan.
	# Node is nodeportA
	# Delay node is nodeportB
	# Other end of delay node will be given by plink
	#   linksdelaydst/lan where nodeportA will be the other node in
	#   the virtual LAN and nodeportB will be the other end of the
	#   delay node.

	($nodeportC,$nodeportD) = @{$plinks{"linksdelaydst/$lan"}};
	($nodeC,$portC) = split(":",$nodeportC);
	($nodeD,$portD) = split(":",$nodeportD);
	printdb "LINK delay: other end = $nodeportC $nodeportD\n";

	# assert nodeB == nodeD

	printdb "  VLANS:\n";
	$vlans{$vlanid} = [$lan,[$nodeportA, $nodeportB]];
	push(@{$nodevlans{$nodeA}},$vlanid);
	printdb "    $vlanid = $lan, \[$nodeportA, $nodeportB\]\n";
	$vlanid++;
	$vlans{$vlanid} = [$lan,[$nodeportC, $nodeportD]];
	push(@{$nodevlans{$nodeC}},$vlanid);
	printdb "    $vlanid = $lan, \[$nodeportC, $nodeportD\]\n";
	$vlanid++;

	($delay,$bandwidth,$lossrate) = @{$delaynodes{$plink}};
	$delays{$delayid} = [$nodeB,$portB,$portD,$lan,
			     $delay,$bandwidth,$lossrate];
	printdb "  Delays: $delayid = \[$nodeB,$portB,$portD,$lan" .
	    ",$delay,$bandwidth,$lossrate\]\n";
	$delayid++;

	$virtA = &find_vport($p2vmap{$nodeA},$lan);
	$virtC = &find_vport($p2vmap{$nodeC},$lan);
	$portmap{"$p2vmap{$nodeA}:$virtA"} = $portA;
	$portmap{"$p2vmap{$nodeC}:$virtC"} = $portC;
	printdb "  Portmap:\n";
	printdb "    $p2vmap{$nodeA}:$virtA = $portA\n";
	printdb "    $p2vmap{$nodeC}:$virtC = $portC\n";
    } elsif (($lan,$member) = ($plink =~ m|^linkdelaysrc/([^/]+)/(.+)$|)) {
	# Node may have multiple entries in lan.
	# Delay node is nodeB and portB.
	# Other end of delay node will be given by plink
	#  linkdelaydst/lan/node where nodeportA will the LAN node and
	#  nodeportB will be the other end of the delay node.
	($nodeportC,$nodeportD) = @{$plinks{"linkdelaydst/$lan/$member"}};
	($nodeC,$portC) = split(":",$nodeportC);
	($nodeD,$portD) = split(":",$nodeportD);
	printdb "LAN delay src: other end = $nodeportC $nodeportD\n";
	
	$vlans{$vlanid} = [$lan,[$nodeportA, $nodeportB]];
	push(@{$nodevlans{$nodeA}},$vlanid);
	printdb "  VLANS:\n";
	printdb "    $vlanid = $lan, \[$nodeportA $nodeportB\]\n";
	$vlanid++;
	
	if (! defined($vlans{$lan})) {
	    $vlans{$lan} = [$lan,[]];
	}
	$members = (@{$vlans{$lan}})[1];
	push(@$members,$nodeportD);
	printdb "    $lan = $lan, \[" . join(" ",@$members) . "\]\n"; 

	($delay,$bandwidth,$loss) = @{$delaynodes{$plink}};
	$delays{$delayid} = [$nodeB,$portB,$portD,$lan,
			     $delay,$bandwidth,$loss];
	printdb "  Delays: $delayid = \[$nodeB,$portB,$portD,$lan," .
	    "$delay,$loss\]\n";
	$delayid++;
	
	$virt = &find_vport($p2vmap{$nodeA},$lan);
	$portmap{"$p2vmap{$nodeA}:$virt"} = $portA;
	printdb "  Portmap: $p2vmap{$nodeA}:$virt = $portA\n";
    } elsif (($lan) = ($plink =~ m|^linksimple/(.+)$|)) {
	# nodeportA and nodeportB are the only two nodes in the
	# virtual LAN and there are no delays.
	printdb "Simple Link\n";
	$vlans{$lan} = [$lan,[$nodeportA,$nodeportB]];
	printdb "  VLANS: $lan = $lan, \[$nodeportA $nodeportB\]\n";
	
	push(@{$nodevlans{$nodeA}},$lan);
	push(@{$nodevlans{$nodeB}},$lan);
	
	$virtA = &find_vport($p2vmap{$nodeA},$lan);
	$virtB = &find_vport($p2vmap{$nodeB},$lan);
	$portmap{"$p2vmap{$nodeA}:$virtA"} = $portA;
	$portmap{"$p2vmap{$nodeB}:$virtB"} = $portB;
	printdb "  Portmap:\n";
	printdb "    $p2vmap{$nodeA}:$virtA = $portA\n";
	printdb "    $p2vmap{$nodeB}:$virtB = $portB\n";
    } elsif (($lan) = ($plink =~ m|^linklan/([^/]+)/.+$|)) {
	# node may be the LAN multiple times.
	# nodeportA is the node.
	# nodeportB is the LAN
	# No delays
	printdb "LAN\n";
	if (! defined($vlans{$lan})) {
	    $vlans{$lan} = [$lan,[]];
	}
	$members = (@{$vlans{$lan}})[1];
	push(@$members,$nodeportA);
	printdb "  VLANS: $lan = $lan,\[" . join(" ",@$members) . "\]\n";

	$virt = &find_vport($p2vmap{$nodeA},$lan);
	$portmap{"$p2vmap{$nodeA}:$virt"} = $portA;
	printdb "  Portmap: $p2vmap{$nodeA}:$virt = $portA\n";
    }
    # Else delaysrc case, will be handled by one of the other cases.
}

# At this point we know our vlans, delays, and the portmap.  We could
# just dump everything to the DB and be done.  However, we have an 
# opportunity to preserve port mappings across swap ins.  We do this
# by looking at the portmap table in the DB which will contain the
# portmapping we found the last time we swapped in.  We're going
# to attempt to swap things around so that our portmap matches that
# portmap.  We can swap two ports if they have the same bandwidth and
# physically connect to the same location.  Swapping involves swapping
# node:portA and node:portB in every VLAN.  We use the vlans array
# to avoid having to search through every VLAN on every swap.
# Let's read in the current portmap, if any.
#

# We can just skip this step if this is the first portmap.  If a
# portmap exists but does not have the same node:vport's in it that
# our portmap does then we have a problem.  We could try to do
# something intelligent, but the main cause of this is an uncleared
# previous version of the experiment.  So what we actually do is
# clear the previous portmap out of the DB, display a warning, and
# skip as if there was no portmap.

printdb "Considering Port Swapping\n";

%prevportmap = ();
684
$result = DBQueryFatal("SELECT vnode,vport,pport from portmap" .
Leigh B. Stoller's avatar
Leigh B. Stoller committed
685
		     " where pid = \"$pid\" and eid = \"$eid\"");
686
while (($vnode,$vport,$pport) = $result->fetchrow_array) {
Leigh B. Stoller's avatar
Leigh B. Stoller committed
687
688
    $prevportmap{"$vnode:$vport"} = $pport;
}
689
$result->finish;
Leigh B. Stoller's avatar
Leigh B. Stoller committed
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745

# Compare portmaps
if (keys(%prevportmap) == 0) {
    $portswap = 0;
} elsif (! &keys_equal(\%portmap,\%prevportmap)){
    print STDERR "WARNING: Portmap in database is incompatible with current portmap.\n";
    print STDERR "   Perhaps a previous version of the experiment did not get cleared?\n";
    $portswap = 0;
} else {
    $portswap = 1;
}

if ($portswap) {
    foreach $vnodeport (keys(%portmap)) {
	($vnode,$vport) = split(":",$vnodeport);
	$pnode = $v2pmap{$vnode};
	$pport = $portmap{$vnodeport};
	$prevpport = $prevportmap{$vnodeport};
	printdb "Looking at $pnode - $pport vs. $prevpport\n";
	if ($pport ne $prevpport) {
	    $okswap = 1;
	    printdb "  Want to swap.\n";
	    # We want to swap.
	    if (&swapok($pnode,$pport,$prevpport)) {
		printdb "  Swap ok.\n";
		foreach $vlan (@{$nodevlans{$pnode}}) {
		    $members = @{$vlans{$vlan}}[1];
		    grep {
			if (/^$pnode:$pport$/) {
			    $_ = "$pnode:$prevpport";
			} elsif (/^$pnode:$prevpport$/) {
			    $_ = "$pnode:$pport";
			}
		    } @$members;
		    printdb "  $vlan: " . join(" ",@$members) . "\n";
		}
	    } else {
		print "Warning: Could not swap $pport and $prevpport.\n";
		print "  Port mapping is not consistent with last swap.\n";
		$okswap = 0;
	    }
	    if ($okswap) {
		$portmap{$vnodeport} = $prevpport;
	    }
	}
    }
}

######################################################################
# Step 4 - Upload to DB
#
# Nothing fancy.
######################################################################
printdb "Uploading to DB\n";
foreach $vlan (keys(%vlans)) {
    ($lan,$members) = @{$vlans{$vlan}};
746
    DBQueryFatal("insert into vlans (id,pid,eid,virtual,members) values" .
Leigh B. Stoller's avatar
Leigh B. Stoller committed
747
	     " (0,\"$pid\",\"$eid\",\"$lan\",\"" .
748
	     join(" ",@$members) . "\")");
Leigh B. Stoller's avatar
Leigh B. Stoller committed
749
750
751
752
}
foreach $delay (keys(%delays)) {
    ($pnode,$int0,$int1,$vname,$delay,$bandwidth,$lossrate) = 
	@{$delays{$delay}};
753
754
    my $pipe0 = 100 + (10 * $delay);
    my $pipe1 = $pipe0 + 10;
755
    DBQueryFatal("insert into delays" .
756
757
758
759
760
761
	     " (pid,eid,node_id,vname,iface0,iface1" .
	     ",pipe0,delay0,bandwidth0,lossrate0" .
	     ",pipe1,delay1,bandwidth1,lossrate1)" .
	     " values ('$pid','$eid','$pnode','$vname','$int0','$int1'".
	     ",$pipe0,$delay,$bandwidth,$lossrate".
	     ",$pipe1,$delay,$bandwidth,$lossrate)");
Leigh B. Stoller's avatar
Leigh B. Stoller committed
762
}
763
DBQueryFatal("delete from portmap where pid=\"$pid\" and eid=\"$eid\"");
Leigh B. Stoller's avatar
Leigh B. Stoller committed
764
765
766
foreach $vnodeport (keys(%portmap)) {
    ($vnode,$vport) = split(":",$vnodeport);
    $pport = $portmap{$vnodeport};
767
    DBQueryFatal("insert into portmap (pid,eid,vnode,vport,pport)" .
Leigh B. Stoller's avatar
Leigh B. Stoller committed
768
	     " values (\"$pid\",\"$eid\",\"$vnode\"" .
769
	     ",\"$vport\",\"$pport\")");
Leigh B. Stoller's avatar
Leigh B. Stoller committed
770
771
772
773
774
    # Shark Hack
    if ($nodes{$vnode} eq "shark-shelf") {
	$shelf = $v2pmap{$vnode};
	$i = 1;
	foreach $shark (@{$sharkshelves{$vnode}}) {
775
776
	    DBQueryFatal("update interfaces set IPalias=\"$ips{$shark}\" " .
		    "where node_id = \"$shelf-$i\"");
Leigh B. Stoller's avatar
Leigh B. Stoller committed
777
778
779
	    $i++;
	}
    } else {
780
781
	DBQueryFatal("update interfaces set IP=\"$ips{$vnodeport}\" where" .
		 " node_id = \"$v2pmap{$vnode}\" and iface = \"$pport\"");
Leigh B. Stoller's avatar
Leigh B. Stoller committed
782
783
784
    }
    # End Shark Hack
}
785
# Load delay_osids and default osids for types
786
787
$result = DBQueryFatal("SELECT type,delay_osid,osid from node_types");
while (($type,$delayosid,$defosid) = $result->fetchrow_array) {
Leigh B. Stoller's avatar
Leigh B. Stoller committed
788
    $delayosids{$type} = $delayosid;
789
    $defosids{$type} = $defosid;
Leigh B. Stoller's avatar
Leigh B. Stoller committed
790
}
791
$result->finish;
Leigh B. Stoller's avatar
Leigh B. Stoller committed
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
@nodepairs = ();
foreach $pnode (keys(%p2vmap)) {
    if (defined($sharkshelves{$p2vmap{$pnode}})) {
	$i = 1;
	foreach $sharknodeport (@{$sharkshelves{$p2vmap{$pnode}}}) {
	    $shark = (split(":",$sharknodeport))[0];
	    push(@nodepairs,["$pnode-$i",$shark]);
	    $i++;
	}
    } else {
	push(@nodepairs,[$pnode,$p2vmap{$pnode}]);
    }
}
foreach $pair (@nodepairs) {
    ($pnode,$vnode) = @$pair;
807
    my $result = DBQueryFatal("SELECT osid,cmd_line,rpms,deltas,startupcmd," .
808
809
810
			 "tarfiles,failureaction from virt_nodes" .
			 " where pid=\"$pid\"" .
			 " and eid=\"$eid\" and vname=\"$vnode\"");
Leigh B. Stoller's avatar
Leigh B. Stoller committed
811
812
    # The if statement will cause us to skip nodes that belong to
    # the experiment but aren't virtual.  I.e. delay nodes.
813
    # Figure out type of pnode
814
    my $result2 = DBQueryFatal("SELECT type from nodes" .
815
			  " where node_id=\"$pnode\"");
816
817
    my ($type) = $result2->fetchrow_array;
    $result2->finish;
818
    if (($osid,$cmdline,$rpms,$deltas,$startupcmd,$tarfiles,$failureaction) = 
819
	$result->fetchrow_array) {
820
821
822
	if (!defined($osid) || $osid eq "") {
	    $osid = $defosids{$type};
	}
823
	DBQueryFatal("UPDATE nodes set def_boot_osid=\"$osid\"," .
824
825
826
		       " def_boot_cmd_line='$cmdline'," .
		       " startstatus='none'," .
		       " bootstatus='unknown'," .
Leigh B. Stoller's avatar
Leigh B. Stoller committed
827
		       " ready=0," .
828
829
830
831
832
833
		       " rpms='$rpms'," .
		       " deltas='$deltas'," .
		       " tarballs='$tarfiles'," .
		       " startupcmd='$startupcmd'," .
		       " failureaction='$failureaction'" .
		       " where node_id='$pnode'");
Leigh B. Stoller's avatar
Leigh B. Stoller committed
834
835
    } elsif (! defined($lannodes{$p2vmap{$pnode}})) {
	# Delay node
836
	DBQueryFatal("UPDATE nodes set def_boot_osid=\"" .
Leigh B. Stoller's avatar
Leigh B. Stoller committed
837
838
		       $delayosids{$type} . "\"," .
		       " startstatus=\"none\"," .
839
		       " bootstatus=\"unknown\"," .
Leigh B. Stoller's avatar
Leigh B. Stoller committed
840
		       " ready=0" .
841
		       " where node_id=\"$pnode\"");
Leigh B. Stoller's avatar
Leigh B. Stoller committed
842
    }
843
    $result->finish;
Leigh B. Stoller's avatar
Leigh B. Stoller committed
844
845
846
}

foreach $pnode (keys(%p2vmap)) {
847
848
849
850
851
852
    $vnode = $p2vmap{$pnode};
    $i = 1;
    if (defined($nodes{$vnode}) && 
	($nodes{$vnode} eq "shark-shelf")) {
	foreach $shark (@{$sharkshelves{$vnode}}) {
	    $vname = (split(":",$shark))[0];
853
854
	    DBQueryFatal("update reserved set vname=\"$vname\" where" .
		     " node_id = \"$pnode-$i\"");
855
856
857
	    $i++;
	}
    } else {
858
859
	DBQueryFatal("update reserved set vname=\"$vnode\"" .
		 " where node_id = \"$pnode\"");
860
    }
Leigh B. Stoller's avatar
Leigh B. Stoller committed
861
862
}

863
864
foreach $vnodeport (keys(%portbw)) {
    ($vnode,$vport) = split(":",$vnodeport);
865
866
867
868
    # SHARK HACK
    if (defined($v2pmap{$vnode})) {
	$pnode = $v2pmap{$vnode};
	$pport = $portmap{$vnodeport};
869
870
871
	DBQueryFatal("update interfaces set " .
		" current_speed=\"$portbw{$vnodeport}\"" .
		" where node_id=\"$pnode\" and iface=\"$pport\"");
872
    }
873
}
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989

######################################################################
# Subroutines
######################################################################

# min(a,b)
# Returns the minimum of a and b.
sub min {
    my ($a,$b) = @_;
    return ($a < $b ? $a : $b);
};

# getbandwidth(bw)
# Returns the lowest ok bandwidth that is greater than or equal to
# the one passed.
sub getbandwidth {
    my $targetbandwidth= $_[0];
    my $bandwidth;
    my $best = 10000000000;
    foreach $bandwidth (keys(%okbandwidths)) {
	if (($bandwidth >= $targetbandwidth) && ($bandwidth < $best)) {
	    $best = $bandwidth;
	}
    }
    return $best;
};

# getnodeport(s)
# Takes a ports result from assign (mac0,mac1) and returns the
# first non-null one.
sub getnodeport {
    $macstring=$_[0];
    ($A,$B) = ($macstring =~ /^\(([^,]+),([^,]+)\)$/);
    if ($A ne "(null)") {
	return $A;
    } else {
	return $B;
    }
};

# isdelay(pnodeport)
# Takes a physical nodeport and retruns 1 if the node is a delay node.
sub isdelay {
    my $pnodeport = $_[0];

    my $node = (split(":",$pnodeport))[0];
    if (($p2vmap{$node} =~ m|^delay/|) ||
	($p2vmap{$node} =~ m|^sdelay.|)) {
	return 1;
    } 
    return 0;
};

# find_vport vnode virtlan
# This finds and returns the virtual port of vnode that it is
# virtlan and not in portmap.
sub find_vport {
    my ($vnode,$virtlan) = @_;
    my $portlan;
    my $vport;
    my $lan;
    # Shark Hack
    if ($nodes{$vnode} eq "shark-shelf") {
	return "0";
    }
    # End Shark Hack
    foreach $portlan (@{$nodelans{$vnode}}) {
	($vport,$lan) = split(":",$portlan);
	if (($virtlan eq $lan) &&
	    (! defined($portmap{"$vnode:$vport"}))) {
	    return $vport;
	}
    }
    return "";
};

# keys_equal A B
# Returns 1 if hashs A and B have the same keys.
sub keys_equal {
    my ($ARef,$BRef) = @_;
    my @AKeys = sort keys(%$ARef);
    my @BKeys = sort keys(%$BRef);
    if ($#AKeys != $#BKeys) {
	return 0;
    }
    my $i;
    for ($i=0;$i<=$#AKeys;++$i) {
	if ($AKeys[$i] ne $BKeys[$i]) {
	    return 0;
	}
    }
    return 1;
};

# swapok(pnode,portA,nodeportB)
# This returns 1 if it is ok to swap portA and portB on node pnode
# and 0 otherwise.
sub swapok {
    my ($pnode,$portA,$portB) = @_;
    # For the Utah testbed we just check to make sure they have
    # the same bandwidth.  In other testbeds we'd also want to make
    # sure they went to the same destination.
    my $result = DBQueryFatal("SELECT interface_type FROM interfaces" .
			     " where node_id = \"$pnode\"" .
			     " and iface = \"$portA\"");
    my ($Atype) = $result->fetchrow_array;
    $result->finish;
    $result = DBQueryFatal("SELECT interface_type FROM interfaces" .
			     " where node_id = \"$pnode\"" .
			     " and iface = \"$portB\"");
    my ($Btype) = $result->fetchrow_array;
    $result->finish;

    return ($interfacespeed{$Atype} == $interfacespeed{$Btype});
};