assign_wrapper.in 117 KB
Newer Older
Leigh B. Stoller's avatar
Leigh B. Stoller committed
1
#!/usr/bin/perl -w
Leigh B. Stoller's avatar
Leigh B. Stoller committed
2
3
#
# EMULAB-COPYRIGHT
4
# Copyright (c) 2000-2004 University of Utah and the Flux Group.
Leigh B. Stoller's avatar
Leigh B. Stoller committed
5
6
# All rights reserved.
#
7
8
use English;
use Getopt::Std;
9
10
use POSIX qw(setsid);
use POSIX ":sys_wait_h";
Leigh B. Stoller's avatar
Leigh B. Stoller committed
11

12
#
Leigh B. Stoller's avatar
Leigh B. Stoller committed
13
14
15
16
17
18
# 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.
Chad Barb's avatar
Chad Barb committed
19
#
20
21
22
23
# XXX: Update does not work with widearea nodes.
#      Internally created nodes (jailhost,delay,sim) are not treated
#        consistently. Needs more thought.
#
24
25
26
27
28
29
30
31
32
33
34
35
36
# Return codes: -1 is an uncontrolled error (someone called die()). No
# recovery is possible so the caller has to check for this explicitly.
# The CANRECOVER bit indicates 'recoverability' (no db or physical
# state was modified by the time the error occurred). It also is used
# to signal that a retry is possible. 
#
my $WRAPPER_SUCCESS		 = 0x00;
my $WRAPPER_FAILED		 = 0x01;	# Failed (Add other values)
my  $WRAPPER_FAILED_MAXCONCURENT = 0x02;	# max_concurrent violation
my  $WRAPPER_FAILED_BANDWIDTH    = 0x04;	# Bandwidth violation
my  $WRAPPER_FAILED_LINKUSERS    = 0x08;	# Linkusers violation
my  $WRAPPER_FAILED_DESIRES      = 0x10;	# Desires violation
my  $WRAPPER_FAILED_UNASSIGNED   = 0x20;	# Unassigned violation
37
my  $WRAPPER_FAILED_CANRECOVER   = 0x40;        # Can recover, retry.
38
my $WRAPPER_DIED_A_HORRIBLE_DEATH= 0x80;	# Do not use this.
39
40
41
# Set this once we modify DB state; forces no recover in fatal().
my $NoRecover = 0;
    
42
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
sub usage ()
{
    print STDERR "Usage: $0 [-v] [-u | -n] pid eid\n";
    print STDERR " -v   - enables verbose output\n";
    print STDERR " -u   - enables update functionality\n";
    print STDERR " -t   - Create the TOP file and then exit\n";
    print STDERR " -n   - Run assign, but do not reserve/modify resources.\n";
    exit(-1);
}
my $optlist  = "vutn";
my $verbose  = 0;
my $updating = 0;
my $toponly  = 0;
my $impotent = 0;

#
# Configure variables
#
my $TBROOT	  = "@prefix@";
my $DELAYCAPACITY = @DELAYCAPACITY@;
$ENV{'PATH'} = "/usr/bin:$TBROOT/libexec:$TBROOT/sbin:$TBROOT/bin";

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

#
# Testbed Support libraries
#
use lib "@prefix@/lib";
use libdb;
use libtestbed;
require exitonwarn;

Chad Barb's avatar
Chad Barb committed
77
#
78
79
80
81
82
# assign_wrapper Settings
#
# Maximum delay in ms above which a delay node is needed.
# (Note that the DB represents delays as floating point numbers)
my $delaythresh = 2;
Chad Barb's avatar
Chad Barb committed
83

84
85
# Maximum number of times we run assign.
my $maxrun = 20;
Leigh B. Stoller's avatar
Leigh B. Stoller committed
86

87
88
89
# Use the switch to delay when possible. Currentlythis only works for 10mbit
# links (actually, its turned off cause it does not work; auto handshake).
my $delaywithswitch = 0;
Leigh B. Stoller's avatar
Leigh B. Stoller committed
90

91
92
93
94
95
96
97
#
# Some handy constants. Speed in Mbits/sec and Kbits/sec units.
#
# Its probably a good idea to leave portbw (current_speed) in Mbs, since
# those numbers are used at the switch and the interfaces, which really
# only think in Mbps.
#
98
99
100
101
102
103
my $S10Mbs   = 10;
my $S100Mbs  = 100;
my $S1000Mbs = 1000;
my $S10Kbs   = 10000;
my $S100Kbs  = 100000;
my $S1000Kbs = 1000000;
Leigh B. Stoller's avatar
Leigh B. Stoller committed
104

105
#
106
107
# Parse command arguments. Once we return from getopts, all that should be
# left are the required arguments.
108
#
109
110
111
%options = ();
if (! getopts($optlist, \%options)) {
    usage();
112
}
113
114
if (@ARGV != 2) {
    usage();
Chad Barb's avatar
Chad Barb committed
115
}
116
if (defined($options{"v"})) {
Chad Barb's avatar
   
Chad Barb committed
117
118
    $verbose = 1;
}
119
if (defined($options{"u"})) {
Chad Barb's avatar
   
Chad Barb committed
120
    $updating = 1;
121
}
122
123
124
125
126
if (defined($options{"t"})) {
    $toponly = 1;
}
if (defined($options{"n"})) {
    $impotent = 1;
Leigh B. Stoller's avatar
Leigh B. Stoller committed
127
}
128
129
130
my $pid = $ARGV[0];
my $eid = $ARGV[1];
my $ptopfile = "$pid-$eid-$$.ptop";
131
132
133
134
135
# Since the topfile could change across
# swapins and modifies, it makes sense
# to store all of them. Helps in
# degugging.
my $topfile  = "$pid-$eid-$$.top";
136

137
138
139
sub fatal ($$)
{
    my($exitcode, $message) = @_;
Leigh B. Stoller's avatar
Leigh B. Stoller committed
140

141
142
143
144
145
146
147
    print STDERR "*** $0:\n".
	         "    $message\n";

    # Remove recover bit.
    $exitcode = $exitcode & ~$WRAPPER_FAILED_CANRECOVER
	if ($NoRecover);
    
148
149
    exit($exitcode);
}
Leigh B. Stoller's avatar
Leigh B. Stoller committed
150

151
152
sub printdb ($)
{
Leigh B. Stoller's avatar
Leigh B. Stoller committed
153
154
155
    if ($verbose) {
	print $_[0];
    }
156
}
Leigh B. Stoller's avatar
Leigh B. Stoller committed
157

158
print "assign_wrapper improved started\n";
159
160
TBDebugTimeStamp("assign_wrapper started");

Leigh B. Stoller's avatar
Leigh B. Stoller committed
161
#
162
# The main data structures:
Leigh B. Stoller's avatar
Leigh B. Stoller committed
163
#
164
165
166
167
168
# virt_nodes: The virtual nodes, indexed by vname. Each entry is a
# hash reference, initially of just the DB info, but possibly
# augmented as we proceed through assign.  Do not confuse these
# virtual nodes with the other virtual nodes! These are the ones from
# the actual topology, the virt_nodes table in the DB.
Leigh B. Stoller's avatar
Leigh B. Stoller committed
169
#
170
171
my %virt_nodes = ();

Leigh B. Stoller's avatar
Leigh B. Stoller committed
172
#
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
# virt_lans: The equivalent of virt_nodes; the virt_lans table in the DB.
# Since there are multiple rows per lan (one for each node), this is a
# multilevel structure. The first slot is another hash, one for each node.
# The rest of the slots store other random things associated with the lan.
# So, looks something like:
#
#   %virt_lans = (link0 => {members    => member0 => { db row ref },
#                                         member1 => { db row ref }}
#                           mustdelay    => 0,
#                           emulated     => 0,
#                           uselinkdelay => 0,
#                           nobwshaping  => 0,
#                           useveth      => 0,
#                           trivok       => 0
#                          }
#                 link1 => ...
#                )
#
my %virt_lans = ();

#
# virt_vtypes: The virt_vtypes table in the DB, indexed by the vtype
# name (user chosen name).
#
my %virt_vtypes = ();

#
# node_types: The node_types table from the DB, indexed by the type name.
#
my %node_types = ();

Leigh B. Stoller's avatar
Leigh B. Stoller committed
204
# 
205
206
207
208
# interface_types: We need this to find out the bandwidths of the devices
# we actually have on the testbed. Index by interface type name.
#
my %interface_types = ();
Leigh B. Stoller's avatar
Leigh B. Stoller committed
209

210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
#
# phys_nodes: The equiv of virt_nodes above, except that these are pulled
# from the DB once the physical resources have been allocated. Indexed
# by physname, but there is a pointer from the virt_nodes table entry
# to the the corresponding physnode entry. 
# 
my %phys_nodes = ();

#
# More physical side data structures.
# v2pmap is indexed by virtual and contains the physical node.
my %v2pmap = ();
# p2vmap is indexed by physical and contains one or more virtual nodes.
my %p2vmap = ();
# plinks is indexed by virtual name and contains
#  (pnodeportA,pnodeportB) .  If one is a delay node it is always
#  the second.
my %plinks = ();
# virtnodes is the list of subnodes on physnodes.
my %virtnodes = ();
my %v2vmap = ();

#
# Support for experiment modify. We create v2p and v2v mappings of the
# current topology so we can figure out how its changed after assign
# runs. These correspond to v2pmap and v2vmap mentioned above.
# 
my %reserved_v2pmap  = ();
my %reserved_v2vmap  = ();
239

Leigh B. Stoller's avatar
Leigh B. Stoller committed
240
#
241
242
243
244
245
246
247
248
249
250
251
252
253
# Experiment wide options. See below. They come from the experiments table.
# Defining these will override experiment table setting. 
#
# Set this when forcing linkdelays instead of delay nodes. Set in the NS
# file with a tb-compat directive. The force directive says to set up a
# link delay, even when no delay would otherwise be inserted.
# usewatunnels is also set in the NS, and can be used to turn them off. 
# The multiplex_factor is to override node_types table for virtnode.
my $uselinkdelays;
my $forcelinkdelays;
my $usewatunnels;
my $multiplex_factor;

254
255
256
257
# For admission control. Not well defined yet.
my $cpu_usage;
my $mem_usage;

258
259
260
261
# Allow override of jail/delay osids.
my $jail_osid;
my $delay_osid;

262
######################################################################
Leigh B. Stoller's avatar
Leigh B. Stoller committed
263

264
265
266
267
268
# ips is indexed by node:port and contains the IP address for the port.
my %ips	      = ();

# memberof is indexed by node:port and holds the lan it is a member of.
my %memberof = ();
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284

# delaylinks stores the actual link delay info, converted from the
# virt delay params above. It is indexed by link name and contains
# [delay,bw,loss] for each direction. 
my %delaylinks = ();

# delaynodes stores the names of delaynodes that we create on the
# fly using delayid. This is useful for doing isdelay? tests.
my %delaynodes = ();
my $delayid    = 0;

# nodedelays and linkdelays are the final (!) representation. Indexed by
# integer id, they store the physical node info and the delay info. 
my %nodedelays = ();
my %linkdelays = ();

285
286
287
288
# Virtual nodes that the user has requested be "fixed" to a specific
# physical node.
my %fixed_nodes     = ();

289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
# portbw is indexed by virtual nodeport and contains the bandwidth of
# that port. Note that port bandwidth in the interfaces table is left
# in Mbps units for now. Thats inconsistent, I know. For LANs with
# other bandwidths the port speed will be 100 and a delay node will be
# inserted.
my %portbw = ();

# lannodes is indexed by physical name and is the set of fake lan nodes.
# lan nodes are named lan/<virtual lan>. We need to know these so that
# when they come back from assign, we can ignore them.
my %lannodes = ();

# Node estimates and counts. Avoid running assign if there is no way to
# satisfy the estimates for physical nodes.
my $minimum_nodes;
my $maximum_nodes;
305
306
my $reserved_pcount  = 0;
my $reserved_vcount  = 0;
307
my $reserved_simcount= 0;
308
309
310
311
my $remotecount      = 0;
my $virtcount        = 0;
my $plabcount        = 0;
my $needwanassign    = 0;
312
my $simcount         = 0;
313

314
315
316
317
318
319
320
321
322
323
324
325
#
# This is for stats gathering. It might duplicate other stuff, but
# thats okay.
#
my %expt_stats = (# pnodes include jailnodes and delaynodes.
		  # We let the wrapper determine pnodes once the
		  # experiment is fully swapped in so that the record
		  # is not "committed" until successful swapin.
		  jailnodes   => 0,
		  vnodes      => 0,
                  # vnodes include wanodes.
		  wanodes     => 0,
326
327
		  # wanodes includes plabnodes.
		  plabnodes   => 0,
328
329
330
331
332
333
334
335
336
337
338
339
340
		  simnodes    => 0,
		  delaynodes  => 0,
		  linkdelays  => 0,
		  links       => 0,
		  walinks     => 0,
		  lans        => 0,
		  shapedlinks => 0,
		  shapedlans  => 0,
		  minlinks    => 100000,
		  # includes emulated links. Maybe thats wrong.
		  maxlinks    => 0,
);

341
342
343
my $simhost_id     = 0;
my %pnode2simhostid;
my %simhostid2pnode;
Shashi Guruprasad's avatar
Shashi Guruprasad committed
344

345
# Counters for generating IDs.
346
my $virtnode_id  = 0;
347
my $veth_id      = 0;
Leigh B. Stoller's avatar
Leigh B. Stoller committed
348

349
350
351
352
353
354
355
356
357
358
#
# Every vnode on a pnode gets its own routing
# table, thus an rtabid. In the case of simulated
# nodes, we need rtabids only for border nodes
# i.e. nodes that have links going out of the pnode.
# Either way, new rtabids are requested via getrtabid(<vnode>,<pnode>)
# when the interfaces table is updated or new veth_interfaces
# are inserted. This hash maintains the rtabids per vnode
my %vnode2rtabid = ();

359
360
######################################################################
# Step 1 - Setup virtual topology
361
#
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
# 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
#
# Delay node names:
#  delay nodes are named tbdelayXX N > 2
#   and tbsdelayXX for N == 2.
#
########################################################################
Chad Barb's avatar
   
Chad Barb committed
393

394
395
printdb "Generating TOP file.\n";
TBDebugTimeStamp("TOP started");
396

397
398
399
400
401
#
# Load phys info. Interface types, node types, etc. Its any physical stuff
# we need.
#
LoadPhysInfo();
402

403
404
405
406
#
# Load the Experiment info and virt topology.
#
LoadExperiment();
407

408
409
410
411
#
# If updating, load current experiment resources. We have to be careful
# of how this is merged in with the (new) desired topology. See below.
#
412
413
414
415
416
if ($updating) {
    LoadCurrent();
    print STDERR "Resetting DB before updating.\n";
    TBExptRemovePhysicalState( $pid, $eid );
}
Chad Barb's avatar
   
Chad Barb committed
417

418
419
420
421
#
# Check Max Concurrent for OSID violations.
#
CheckMaxConcurrent();
422

423
424
425
426
#
# Create the TOP file.
#
CreateTopFile();
427

428
429
430
431
432
433
TBDebugTimeStamp("TOP finished");

# Stop here ...
if ($toponly) {
    print "Stopping after creating the TOP file, as directed.\n";
    exit(0);
Leigh B. Stoller's avatar
Leigh B. Stoller committed
434
}
435

436

437
438
439
440
441
442
443
444
445
######################################################################
# 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.
#
#######################################################################
Leigh B. Stoller's avatar
Leigh B. Stoller committed
446

447
448
my $currentrun = 1;
my $canceled   = 0;
449
450

# XXX plab hack - only run assign once on plab topologies, since they're easy
451
# to map and the physical topology does not change frequently.
452
if ($plabcount && (keys(%virt_nodes) == $plabcount)) {
453
    $maxrun = 2;
454
}
455

456
457
TBDebugTimeStamp("assign_loop started");
while (1) {
458
    # Check cancel flag before continuing. 
459
    TBGetCancelFlag($pid, $eid, \$canceled);
460
461
    fatal($WRAPPER_FAILED|$WRAPPER_FAILED_CANRECOVER,
	  "Cancel flag set; aborting assign run!")
462
463
	if ($canceled);

464
    print "Assign Run $currentrun\n";
465

466
467
468
469
470
471
472
473
474
475
476
477
478
    #
    # RunAssign returns 0 if successful. Returns -1 if there was an
    # an error in RunAssign that is deemed fatal; do not try anymore.
    # The exitcode is returned in $exitcode. If RunAssign returns a
    # postive value, it means there was a problem, but we can keep
    # trying.
    #
    my $exitcode = 0;
    my $retval   = RunAssign(\$exitcode);

    # Success!
    last
	if ($retval == 0);
Leigh B. Stoller's avatar
Leigh B. Stoller committed
479

480
481
482
483
    if ($currentrun >= $maxrun) {
	fatal($exitcode, "Reached run limit. Giving up.");
    }

484
485
486
487
    if ($retval < 0) {
	#
	# Failure in assign.
	#
488
	fatal($exitcode, "Unretriable error. Giving up.");
489
    }
490
    
491
492
493
494
495
496
497
498
499
500
501
502
503
504
    print "Waiting 5 seconds and trying again...\n";
    sleep(5);
    $currentrun++;
}
TBDebugTimeStamp("assign_loop finished");

#
# Run assign once.
# 
sub RunAssign ($)
{
    my ($retval) = @_;

    # Clear globals for each run.
Leigh B. Stoller's avatar
Leigh B. Stoller committed
505
506
    undef %v2pmap;
    undef %p2vmap;
507
    undef %v2vmap;
Leigh B. Stoller's avatar
Leigh B. Stoller committed
508
    undef %plinks;
509
    undef %virtnodes;
510
511
512

    my %toreserve = ();
    my %subnodes  = ();
Shashi Guruprasad's avatar
Shashi Guruprasad committed
513
    
514
    TBDebugTimeStamp("ptopgen started");
515
    # Snapshot physical resources.
Chad Barb's avatar
   
Chad Barb committed
516
517
518
519
    #
    # if updating (-u), include any resources that may already be
    # allocated to experiment in the PTOP results.
    #
520
521
    my $ptopargs = "-p $pid ";
    $ptopargs   .= "-e $eid "
522
523
524
	if ($updating);
    $ptopargs   .= "-m $multiplex_factor "
	if (defined($multiplex_factor));
525
526
    $ptopargs   .= "-v "
	if ($virtcount);
527
528
    $ptopargs   .= "-r "
	if ($remotecount);
529
530
    $ptopargs   .= "-S "
	if ($simcount);
531
    system("ptopgen $ptopargs > $ptopfile");
Chad Barb's avatar
   
Chad Barb committed
532

533
    TBDebugTimeStamp("ptopgen finished");
Leigh B. Stoller's avatar
Leigh B. Stoller committed
534
535

    # Get number of nodes
536
    my $numnodes = TBAvailablePCs($pid);
Leigh B. Stoller's avatar
Leigh B. Stoller committed
537
    
538
    if ($numnodes < ($minimum_nodes - $reserved_pcount)) {
539
540
	fatal($WRAPPER_FAILED|$WRAPPER_FAILED_CANRECOVER,
	      "Insufficient nodes available.");
Leigh B. Stoller's avatar
Leigh B. Stoller committed
541
542
    }

543
    TBDebugTimeStamp("assign started");
Leigh B. Stoller's avatar
Leigh B. Stoller committed
544
    # Run assign
Leigh B. Stoller's avatar
Leigh B. Stoller committed
545
    my $cmdargs = "$ptopfile $topfile";
546
    $cmdargs = "-uPod -c .75 $cmdargs"
547
	if ($virtcount);
548
    print "assign $cmdargs\n";
Leigh B. Stoller's avatar
Leigh B. Stoller committed
549

550
551
552
553
554
555
556
557
558
559
560
561
562
563
    #
    # Fork a child to run assign. Parent spins watching the cancel flag
    # and waiting for assign to finish.
    #
    if (my $childpid = fork()) {
	while (1) {
	    sleep(2);

	    if (waitpid($childpid, &WNOHANG) == $childpid) {
		$assignexitcode = $? >> 8;
		last;
	    }

	    # Check cancel flag.
564
	    TBGetCancelFlag($pid, $eid, \$canceled);
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
	    if ($canceled) {
		if ((my $pgrp = getpgrp($childpid)) > 0) {
		    kill('TERM', -$pgrp);
		    waitpid($childpid, 0);
	    
		    fatal($WRAPPER_FAILED|$WRAPPER_FAILED_CANRECOVER,
			  "Cancel flag set; aborting assign run!");
		}
		# Loop again to reap child above before exit.
	    }
	}
    }
    else {
	#
	# Change our session so the child can get a killpg without killing
	# the parent. 
	#
        POSIX::setsid();
583
	exec("nice assign $cmdargs > assign.log");
584
585
586
	die("*** $0:\n".
	    "    Could not start assign!\n");
    }
Chad Barb's avatar
Chad Barb committed
587

588
    # Check cancel flag before continuing. 
589
    TBGetCancelFlag($pid, $eid, \$canceled);
590
591
    fatal($WRAPPER_FAILED|$WRAPPER_FAILED_CANRECOVER, 
	  "Cancel flag set; aborting assign run!")
592
593
	if ($canceled);

594
595
596
    my $violations = 0;
    my $score = -1;

597
598
599
600
601

    # Saving up assign.log coz each swapin/modify is
    # different and it is nice to have every mapping
    # for debugging and archiving purposes
    system("/bin/cp assign.log assign-$pid-$eid-$$.log");
602
603
604
605
606
    open(ASSIGNFP, "assign.log") or
	fatal($WRAPPER_FAILED|$WRAPPER_FAILED_CANRECOVER,
	      "Could not open assign logfile!");

    if ($assignexitcode == 0) {
Chad Barb's avatar
Chad Barb committed
607
608
609
610
611
612
613
614
615
616
617
618
619
	# read output
	# Header
	printdb "Reading assign results.\n";
	while (<ASSIGNFP>) {
	    chop;
	    /No physical nodes of type (.+)$/ && do {
		$score=-2;
		print $_ . "\n";
	    };
	    /^With ([0-9]+) violations$/ && do {
		$violations = $1;
		last;
	    };
620
621
622
623
	    /^[ \t]+BEST SCORE: [ \t]+([0-9]+(\.[0-9]+)?)/ && do {
		$score=$1;
		print $_ . "\n";
	    };
Chad Barb's avatar
Chad Barb committed
624
625
626
	}
	if ($score == -2) {
	    # Type error
627
628
	    fatal($WRAPPER_FAILED|$WRAPPER_FAILED_CANRECOVER,
		  "Type error. Giving up!");
Chad Barb's avatar
Chad Barb committed
629
630
	}
	printdb "Found score $score, violations $violations.\n";
631
    }
Leigh B. Stoller's avatar
Leigh B. Stoller committed
632

633
634
635
636
637
638
639
640
641
    #
    # If we found violations above, or if the score is <0 then figure
    # out what happened, and return the result. I am not sure if this
    # stuff is set when the assign exitcode is 2 (no retry), but we end up
    # in here anyway. Should be harmless.
    #
    if ($violations || $score < 0 || $assignexitcode) {
	# Compute the exitcode and return it. Caller decides what to do.
	my $exitcode = $WRAPPER_FAILED|$WRAPPER_FAILED_CANRECOVER;
642

643
644
645
646
647
648
649
650
651
652
653
	# spit out up to nodes
	print "ASSIGN FAILED: \n";       
	while (<ASSIGNFP>) {
	    if (/link_users:\s*(\d+)$/) {
		$exitcode |= $WRAPPER_FAILED_LINKUSERS;
	    }
	    elsif (/bandwidth:\s*(\d+)$/) {
		$exitcode |= $WRAPPER_FAILED_BANDWIDTH;
	    }
	    elsif (/unassigned:\s*(\d+)$/) {
		$exitcode |= $WRAPPER_FAILED_UNASSIGNED;
654
	    }
655
656
657
658
659
660
661
662
	    elsif (/desires:\s*(\d+)$/) {
		$exitcode |= $WRAPPER_FAILED_DESIRES;
	    }
	    if (/^Nodes:/) {last;}
	    print "$_";
	}
	close(ASSIGNFP);
	$$retval = $exitcode;
Chad Barb's avatar
   
Chad Barb committed
663

664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
	# Signal retriable to caller, since assign thinks it is.
	return 1
	    if ($assignexitcode == 1);
	return -1;
    }

    #
    # Assign success; parse results.
    # 
    # read nodes section
    while (<ASSIGNFP> !~ /^Nodes:/) {}
    printdb "Nodes:\n";
    while (<ASSIGNFP>) {
	chop;
	/^End Nodes$/ && last;
	@info = split;
	my ($virtual,$physical) = @info[0,1];

	# We don't care about LAN nodes anymore.
	if (defined($lannodes{$virtual})) {
	    next;
	}

	if (physnodeallocated($physical)) {
	    #
	    # Mark node as being reused.
	    #
	    # Look at virtual node being mapped to node;
	    # if it wasn't in the previous map, mark node for reboot.
	    #
	    if (physnodereuse($physical) eq "reboot") {
		# No changes once it goes into reboot.
		;
	    }
	    elsif (virtnodeisvirt($virtual)) {
699
		#
700
701
702
703
704
705
706
707
708
709
710
711
712
713
		# A new virt virtual node on an existing physical node
		# does not force the physnode to be rebooted; we can
		# set up a new virtnode on it without a reboot. If its
		# an existing virtual on the same physnode, then mark
		# both as reused; no need to reboot either. If the 
		# virtnode has moved here from someplace else, no
		# reboot of the physnode either, but obviously the
		# vnode will be released and a new one allocated.  What
		# we cannot determine is if its just a renamed node
		# (which would require a reboot of the the virtual
		# node). 
		# 
		if (!exists($reserved_v2pmap{$virtual})) {
		    physnodesetreuse($physical, "reused");
Chad Barb's avatar
   
Chad Barb committed
714
		}
715
716
		elsif ($reserved_v2pmap{$virtual} eq $physical) {
		    my $reserved = $reserved_v2vmap{$virtual};
717

718
719
		    physnodesetreuse($reserved, "reused");
		    physnodesetreuse($physical, "reused");
720
721
		}
		else {
722
		    physnodesetreuse($physical, "reused");
723
724
725
		}
	    }
	    else {
Chad Barb's avatar
   
Chad Barb committed
726
		#
727
728
729
730
731
732
733
		# If a new virtual node mapped to this physnode (maybe
		# even the luser changed the name of the node), or if an
		# existing virtual node moved to this physnode, must
		# reboot the physnode. Else, the physnode is being
		# reused as is, and no need to mess with it. If the
		# user requested reboot, that will be handled outside
		# of this script.
734
		#
735
736
737
738
739
740
		if (!exists($reserved_v2pmap{$virtual}) ||
		    $reserved_v2pmap{$virtual} ne $physical) {
		    physnodesetreuse($physical, "reboot");
		}
		else {
		    physnodesetreuse($physical, "reused");
741
		}
742
	    }
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
	}
	else {
	    #
	    # This is a new node; we'll have to reserve it. Note that
	    # we do not reserve a widearea physnode when a virtual node
	    # is mapped to it; they are special.
	    #
	    $toreserve{$physical} = 1
		if (!virtnodeisremote($virtual));
	}
	
	if (virtnodeisvirt($virtual)) {
	    #
	    # If mapping a virtual node, then record that, since we need
	    # to allocate the virtnodes on that physnode, later.
	    #
	    if (!defined($virtnodes{$physical})) {
		$virtnodes{$physical} = [];
Shashi Guruprasad's avatar
Shashi Guruprasad committed
761
	    }
762
763
764
765
766
767
768
769
770
771
772
773
774
	    push(@{$virtnodes{$physical}}, $virtual);
	}
	elsif (virtnodeissubnode($virtual)) {
	    #
	    # Need to allocate the parent to. Should be optional?
	    # Save away and deal with once we have all the results.
	    #
	    $subnodes{$virtual} = $physical;
	}
	
	$v2pmap{$virtual} = $physical;
	if( ! defined($p2vmap{$physical}) ) {
	    $p2vmap{$physical} = [];
Leigh B. Stoller's avatar
Leigh B. Stoller committed
775
	}
776
777
778
	push(@{$p2vmap{$physical}}, $virtual);
	printdb "  $virtual $physical\n";
    }
Leigh B. Stoller's avatar
Leigh B. Stoller committed
779

780
781
782
783
784
785
786
787
788
    #
    # Process the subnodes. We have to allocate the parent at the same
    # time, lest it get sucked away for some other purpose by another
    # experiment. We might want to push this off into nalloc, but not
    # sure yet.
    #
    for my $virtual (keys(%subnodes)) {
	my $physical = $subnodes{$virtual};
	my $parent;
789

790
	TBPhysNodeID($physical, \$parent);
791

792
	printdb "  Subnode: $virtual $physical $parent\n";
793

794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
	#
	# See if we already have it. Swapmod, retry, or perhaps
	# the parent could be named separately? Or maybe there are
	# several subnodes on the physnode?
	#
	next
	    if (exists($p2vmap{$parent}));

	# Make up a name and add to the list.
	my $newvname = newvname($parent, "phost");

	$v2pmap{$newvname} = $parent;
	$p2vmap{$parent} = [ $newvname ];
	$toreserve{$parent} = 1;
	printdb "  Adding subnode host: $newvname $parent\n";
    }

    # read Edges
    # By convention, in plinks, the delay node is always the second
    # entry.
    while (<ASSIGNFP> !~ /^Edges:/) { }
    printdb "Edges:\n";
    EDGEWHILE: while (<ASSIGNFP>) {
	/^End Edges$/ && last EDGEWHILE;
	@info = split;
	$line = $_;
	$_ = $info[1]; # type
        SWITCH1: {
	    /^intraswitch$/ && do {
		($vlink,$rawA,$rawB) = @info[0,3,5];
		last SWITCH1;
	    };
	    /^interswitch$/ && do {
		($vlink,$rawA,$rawB) = @info[0,3,$#info];
		last SWITCH1;
	    };
	    /^direct$/ && do {
		($vlink,$rawA,$rawB) = @info[0,3,5];
		last SWITCH1;
	    };
	    /^trivial$/ && do {
		# we don't have plinks for trivial links
		$vlink = $info[0];
		$plinks{$vlink} = [];
		next EDGEWHILE;
	    };
	    print "Found garbage: $line\n";
Leigh B. Stoller's avatar
Leigh B. Stoller committed
841
	}
842
843
844
845
846
847
	$nodeportA = &getnodeport($rawA);
	$nodeportB = &getnodeport($rawB);
	$nodeportA =~ s/\//:/;
	$nodeportB =~ s/\//:/;
	$plinks{$vlink} = [$nodeportA,$nodeportB];
	printdb "  $vlink " . join(" ",@{$plinks{$vlink}}) . "\n";
Leigh B. Stoller's avatar
Leigh B. Stoller committed
848
849
    }
    close(ASSIGNFP);
850
    TBDebugTimeStamp("assign finished");
Leigh B. Stoller's avatar
Leigh B. Stoller committed
851
852

    # Reserve resources
853
854
855
856
    if ($impotent) {
	print "Skipping physical reservation, as directed.\n";
	return 0;
    }
Chad Barb's avatar
Chad Barb committed
857

858
859
860
861
    TBDebugTimeStamp("reserving started");
    system("nalloc -p $pid $eid " . join(" ", keys(%toreserve)));
    TBDebugTimeStamp("reserving finished");
    my $exitval  = $? >> 8;
Chad Barb's avatar
   
Chad Barb committed
862

863
864
865
866
867
868
869
870
    #
    # If nalloc failed with a fatal error, lets give it up. No retry.
    # 
    if ($exitval < 0) {
	print "Failed to reserve any nodes.\n";
	$$retval = $WRAPPER_FAILED|$WRAPPER_FAILED_CANRECOVER;
	return -1; 
    }
Chad Barb's avatar
   
Chad Barb committed
871

872
873
874
875
876
877
878
    #
    # Okay, if nalloc got anything, we have to set the norecover bit,
    # since tbswap operates on the principle that any change in the DB
    # means no recover is possible. This can probably me dealt with by
    # deallocating any nodes we allocated in the wrapper before exiting.
    #
    $NoRecover = 1;
Chad Barb's avatar
   
Chad Barb committed
879

880
881
882
883
884
885
886
887
888
889
890
891
892
893
    #
    # Otherwise, all newly allocated nodes MUST go to the INIT_DIRTY
    # allocstate since the user now has control of them. If we eventually
    # fail, nodes not in RES_READY are deallocated (retry/modify). 
    #
    if ($exitval > 0) {
	my @reserved = ExpNodes($pid, $eid);

	# We got only some. Need to figure out which.
	print "Reserved some nodes ($exitval) we needed, but not all.\n";
	
	foreach my $node (@reserved) {
	    if (exists($toreserve{$node})) {
		TBSetNodeAllocState($node, TBDB_ALLOCSTATE_RES_INIT_DIRTY());
Chad Barb's avatar
   
Chad Barb committed
894
	    }
Leigh B. Stoller's avatar
Leigh B. Stoller committed
895
896
	}

897
898
899
900
901
902
903
904
905
906
907
908
	#
	# We check to see if were were able to reserve all the fixed
	# nodes we needed. If we couldn't get the fixed list, then
	# this experiment is unlikely to map in the "near" future, so
	# give up now (no retry).
	#
	foreach my $node (values(%fixed_nodes)) {
	    if (! grep {$_ eq $node} @reserved) {
		printdb "  Could not allocate fixed node $node!\n";
		$$retval = $WRAPPER_FAILED;
		return -1;
	    }
Leigh B. Stoller's avatar
Leigh B. Stoller committed
909
	}
910
911
912
913
914
915
916
917
918
919
920
	#
	# Okay, must extend the fixed list with newly allocated nodes
	# so that we can recreate the top file, and try again with a
	# new set.
	#
	foreach my $node (@reserved) {
	    if (exists($toreserve{$node})) {
		foreach my $vname (@{$p2vmap{$node}}) {
		    $fixed_nodes{$vname} = $node;
		}
	    }
921
	}
922
923
924
925
	CreateTopFile();
	$$retval = 0;
	return 1;
    }
Chad Barb's avatar
Chad Barb committed
926

927
928
929
930
931
932
933
934
935
    #
    # We got all the nodes we wanted. All newly allocated nodes MUST
    # go to the INIT_DIRTY allocstate since the user now has control
    # of them.
    #
    print "Successfully reserved all physical nodes we needed.\n";
	
    foreach my $node (keys(%toreserve)) {
	TBSetNodeAllocState($node, TBDB_ALLOCSTATE_RES_INIT_DIRTY());
Leigh B. Stoller's avatar
Leigh B. Stoller committed
936
    }
Chad Barb's avatar
Chad Barb committed
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
    #
    # Release phys and virt nodes no longer needed. They are marked
    # for teardown. They need to be freed by SOMEONE, currently the
    # wrapper (tbswap), since this only happens when in update mode
    # (swapmod).
    #
    foreach my $pnode (keys(%phys_nodes)) {
	my $reuse = physnodereuse($pnode);
		
	if ($reuse eq "unused") {
	    #
	    # Node was used in previous incarnation, but not any more.
	    #
	    TBSetNodeAllocState($pnode, TBDB_ALLOCSTATE_RES_TEARDOWN());
	}
	elsif ($reuse eq "reboot") {
	    #
	    # Node is being reused, but for a different purpose, so
	    # it should be rebooted.
	    #
	    TBSetNodeAllocState($pnode, TBDB_ALLOCSTATE_RES_INIT_DIRTY());
	}
    }
    return 0;
Leigh B. Stoller's avatar
Leigh B. Stoller committed
962
}
963

964
965
966
967
968
969
970
971
972
973
###########################################################################
# Step 2A
#
# We run the wanassigner to allocate remote nodes. We do this after cause
# it takes so long. We run it just once.
#
# wanassign does its own nalloc.
#
###########################################################################

974
#
975
# VIRTNODES HACK: Allocate the remote virtual nodes.
976
#
977
if ($needwanassign) {
978
    my $success  = 0;
979
    my %wanmap   = ();
980

981
982
    print "Running 'wanassign -d $pid $eid'\n";
    open(WANFP,"wanassign -d $pid $eid 2>&1 | tee wanassign.log |") or
983
984
	fatal($WRAPPER_FAILED|$WRAPPER_FAILED_CANRECOVER,
	      "Failed to start wanassign: $!");
985
986
987
988
989

    printdb "Reading wanassign results.\n";
    while (<WANFP>) {
	chop;
	if ($_ =~ /(\S+) mapsto (\S+)/) {
990
991
	    $wanmap{$1} = $2;
	    printdb "  $1 mapsto $2\n";
992
	}
993
994
995
996
997
998
	if ($_ =~ /^Success/) {
	    $success = 1;
	}
	# Skip other output. Usually its debugging output.
    }
    close(WANFP) or
999
1000
1001
1002
	fatal($WRAPPER_FAILED|$WRAPPER_FAILED_CANRECOVER,
	      "wanassign: " .
	      ($? ? "exited with status: $?." :
	            "error closing pipe: $!"));
1003

1004
    if (!$success) {
1005
1006
	fatal($WRAPPER_FAILED|$WRAPPER_FAILED_CANRECOVER,
	      "wanassign could not find a solution!");
1007
    }
1008
1009
    foreach my $virtual (keys(%wanmap)) {
	my $physical = $wanmap{$virtual};
1010

1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
	fatal($WRAPPER_FAILED|$WRAPPER_FAILED_CANRECOVER,
	      "Improper mapping from wanassign: $virtual/$physical")
	    if (!virtnodeisvirt($virtual));
	
	#
	# If mapping a virtual node, then record that, since we need
	# to allocate the virtnodes on that physnode, later.
	#
	if (!defined($virtnodes{$physical})) {
	    $virtnodes{$physical} = [];
1021
	}
1022
1023
1024
1025
1026
	push(@{$virtnodes{$physical}}, $virtual);
	
	$v2pmap{$virtual} = $physical;
	if( ! defined($p2vmap{$physical}) ) {
	    $p2vmap{$physical} = [];
1027
	}
1028
	push(@{$p2vmap{$physical}}, $virtual);
1029
    }
1030
    TBDebugTimeStamp("wanassign finished");
1031
1032
}

Chad Barb's avatar
Chad Barb committed
1033
1034
#
# Recoverability ends.
1035
# All fatal() calls from this point do not have the recoverable '64' bit set.
Chad Barb's avatar
Chad Barb committed
1036
#
1037
$NoRecover = 1;
1038

1039
1040
1041
# VIRTNODES HACK: Local virtnodes have to be mapped now. This is a little
# hokey in that the virtnodes just need to be allocated from the pool that
# is on the real node. We know they are free, but we should go through
1042
# nalloc anyway. If anything fails, no point in retry.
Leigh B. Stoller's avatar
Leigh B. Stoller committed
1043
#
1044
1045
foreach my $pnode (keys(%virtnodes)) {
    my @vlist = @{$virtnodes{$pnode}};
1046
    my $numvs = @vlist;
1047
    my @plist = ();
1048
1049
    my @oplist = ();
    my @ovlist = ();
Leigh B. Stoller's avatar
Leigh B. Stoller committed
1050

1051
    # Check cancel flag before continuing. 
1052
    TBGetCancelFlag($pid, $eid, \$canceled);
1053
1054
    fatal($WRAPPER_FAILED,
	  "Cancel flag set; aborting assign run!")
1055
1056
	if ($canceled);

Leigh B. Stoller's avatar
Leigh B. Stoller committed
1057
    #
1058
1059
1060
    # If updating, need to watch for nodes that are already reserved.
    # We save that info in oplist/ovlist, and build a new vlist for
    # avail, of just the nodes we need in this run. 
1061
    #
1062
1063
1064
1065
1066
    if ($updating) {
	my @newvlist = ();
	my @delvlist = ();
	
	foreach my $vnode (@vlist) {
1067
	    if (!defined($reserved_v2vmap{$vnode})) {
1068
1069
1070
1071
		# A new vnode on pnode to allocate.
		push(@newvlist, $vnode);
		next;
	    }
1072
	    if ($reserved_v2pmap{$vnode} ne $pnode) {
1073
		# A vnode moved. Its new to this pnode.
1074
		print "$vnode has moved from $reserved_v2pmap{$vnode} ".
1075
1076
1077
1078
1079
		    "to $pnode!\n";
		
		push(@newvlist, $vnode);
		next;
	    }
Leigh B. Stoller's avatar
Leigh B. Stoller committed
1080

1081
	    # Push already allocated p/v onto lists for later.
1082
	    push(@oplist, $reserved_v2vmap{$vnode});
1083
1084
1085
1086
1087
	    push(@ovlist, $vnode);
	}
	# These are the new nodes we need to allocate
	@vlist = @newvlist;
	$numvs = scalar(@vlist);
Leigh B. Stoller's avatar
Leigh B. Stoller committed
1088

1089
1090
1091
1092
	if (@oplist) {
	    print "Reusing vnodes @oplist\n"; 
	}
    }
Leigh B. Stoller's avatar
Leigh B. Stoller committed
1093

1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
    #
    # Still need to allocate some virtnodes?
    #
    if ($numvs) {
	#
	# Run avail to get the list of virtnodes on the phys node. We
	# already know there are enough, since assign knows that.
	#
	print "Asking avail for $numvs vnodes on $pnode\n";
    
	open(AVAIL,"$TBROOT/sbin/avail virtonly=$pnode rand limit=$numvs |")
1105
	    or fatal($WRAPPER_FAILED, "avail failed");
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116

	while (<AVAIL>) {
	    next
		if (! /^\|/);
	    next
		if (/node_id/);

	    if ($_ =~ /^\|([-a-zA-Z0-9]+)\s*\|(\w+)\s*\|(\w+)\s*\|$/) {
		push(@plist, $1);
	    }
	    else {
1117
1118
		fatal($WRAPPER_FAILED,
		      "Bad line from avail: $_");
1119
	    }
Leigh B. Stoller's avatar
Leigh B. Stoller committed
1120
	}
1121
1122
1123
1124
	close(AVAIL);

	# Sanity check.
	if (scalar(@vlist) != scalar(@plist)) {
1125
1126
	    fatal($WRAPPER_FAILED,
		  "Could not map some virtual nodes on $pnode");
Leigh B. Stoller's avatar
Leigh B. Stoller committed
1127
	}
Leigh B. Stoller's avatar
Leigh B. Stoller committed
1128

1129
1130
1131
1132
	#
	# Try to allocate. Note, if this fails we are done for. Okay for now
	# since it is never the case that it should fail!
	#
1133
	if ($impotent) {
1134
	    print "Selected for $pnode: @plist\n";
1135
1136
1137
	    print "Skipping physical reservation, as directed.\n";
	}
	else {
1138
	    print "Reserving on $pnode: @plist ...\n";
1139
	    if (system("nalloc $pid $eid @plist")) {
1140
1141
		fatal($WRAPPER_FAILED,
		      "Failed to reserve @plist (on $pnode)");
1142
	    }
1143
	}
Leigh B. Stoller's avatar
Leigh B. Stoller committed
1144
1145
    }

1146
1147
1148
1149
1150
1151
1152
    if ($updating) {
	#
	# Append the lists we created above, so that we get all of them
	# in the loop below.
	#
	@plist = (@plist, @oplist);
	@vlist = (@vlist, @ovlist);
Leigh B. Stoller's avatar
Leigh B. Stoller committed
1153
    }
1154
    
1155
1156
1157
    while (@plist) {
	my $physical = pop(@plist);
	my $virtual  = pop(@vlist);
Leigh B. Stoller's avatar
Leigh B. Stoller committed
1158

1159
1160
	$v2vmap{$virtual}  = $physical;
	printdb "  Mapping $virtual to $physical on $pnode\n";
Leigh B. Stoller's avatar
Leigh B. Stoller committed
1161

1162
1163
1164
1165
1166
	#
	# New virtual nodes are always clean. Old ones stay in whatever
	# state they were in so that os_setup/vnode_setup know they
	# need to reboot them.
	#
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
	if (!$impotent) {
	    if (!defined($reserved_v2vmap{$virtual})) {
		TBSetNodeAllocState($physical,
				    TBDB_ALLOCSTATE_RES_INIT_CLEAN());
	    }
	    elsif ($reserved_v2vmap{$virtual} ne $physical) {
		# Node has moved! Nuts!
		TBSetNodeAllocState($physical,
				    TBDB_ALLOCSTATE_RES_INIT_DIRTY());
	    }
1177
	}
1178
1179
    }
}
1180

1181
# Check cancel flag before continuing. 
1182
TBGetCancelFlag($pid, $eid, \$canceled);
1183
1184
fatal($WRAPPER_FAILED,
      "Cancel flag set; aborting assign run!")
1185
1186
    if ($canceled);

1187
# Set port range (see below for how we deal with update).
Leigh B. Stoller's avatar
Leigh B. Stoller committed
1188
TBExptSetPortRange();
1189

1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
# Load the current physical resources. This avoids lots of repeated
# queries to the DB.
LoadPhysResources();

#
# For update, wipe old interfaces in DB (normally done by nfree.)
# These will get rebuilt soon. 
#
if ($updating && !$impotent) {
    foreach my $pnode (keys(%phys_nodes)) {
	#
	# Do not need to do this for phys nodes that are to be
	# released, or for virtnodes since they do not have interfaces
	# associated with them directly. This is probably a bad assumption
	# though, and perhaps this entire function should be moved to the
	# library. 
	#
	next
	    if (physnodeisvirtnode($pnode) ||
		physnodereuse($pnode) eq "unused");

1211
	DBQueryFatal("update interfaces set IP='',IPaliases=NULL,mask=NULL,rtabid='0',vnode_id=NULL " .
1212
1213
		     "where node_id='$pnode' and ".
		     "  role='" . TBDB_IFACEROLE_EXPERIMENT() . "'");
1214
1215
1216
1217
1218
1219

	# Clean the veth_interfaces table for this node too.
	DBQueryFatal("delete from veth_interfaces where node_id='$pnode'");
    }
}

Leigh B. Stoller's avatar
Leigh B. Stoller committed
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
######################################################################
# 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.
#
# 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.
#
# 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.
######################################################################

$delayid = 0;

printdb "Interpreting results.\n";
1246
TBDebugTimeStamp("interpreting started");
Leigh B. Stoller's avatar
Leigh B. Stoller committed
1247
foreach $plink (keys(%plinks)) {
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
    # trivial links do not have physical links, so no delay nodes. But,
    # we *do* use trivial links for intranode links, and thus there could
    # be link delays (ie: two jailed nodes on a link/lan assigned to the
    # same phys node).
    my $trivial = 0;

    if (scalar(@{$plinks{$plink}})) {
	($nodeportA,$nodeportB) = @{$plinks{$plink}};
	($nodeA,$portA) = split(":", $nodeportA);
	($nodeB,$portB) = split(":", $nodeportB);
	printdb "plink $plink - $nodeportA $nodeportB\n";
    }
    else {
	$trivial = 1;
	printdb "plink $plink - trivial\n";
Shashi Guruprasad's avatar
Shashi Guruprasad committed
1263
    }
1264

1265
    if (($lan,$virtA,$virtC) =
1266
	   ($plink =~ m|^linksdelaysrc/(.+)/(.+),(.+)$|)) {
1267
1268
1269
1270
	# trivial links do not have physical links, so no delay nodes.
	if ($trivial) {
	    next;
	}
Leigh B. Stoller's avatar
Leigh B. Stoller committed
1271
1272
1273
	# Node has a single entry in lan.
	# Node is nodeportA
	# Delay node is nodeportB
1274
	# Other end of delay node will be given by corresponding plink
1275
1276
	#   linksdelaydst/lan/virtC,virtA where nodeportA will be the other 
	#   node in the virtual LAN and nodeportB will be the other end of the
Leigh B. Stoller's avatar
Leigh B. Stoller committed
1277
	#   delay node.
1278
1279
	($nodeportC,$nodeportD) =
	    @{$plinks{"linksdelaydst/$lan/$virtC,$virtA"}};
Leigh B. Stoller's avatar
Leigh B. Stoller committed
1280
1281
1282
1283
1284
1285
1286
	($nodeC,$portC) = split(":",$nodeportC);
	($nodeD,$portD) = split(":",$nodeportD);
	printdb "LINK delay: other end = $nodeportC $nodeportD\n";

	# assert nodeB == nodeD

	printdb "  VLANS:\n";
1287
1288
	AddVlan("link", "$lan" . "-delaysrc", $nodeportA, $nodeportB);
	AddVlan("link", "$lan" . "-delaydst", $nodeportC, $nodeportD);
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
	
	my ($member0,$delay,$bandwidth,$lossrate,
	    $member1,$rdelay,$rbandwidth,$rlossrate) = @{$delaylinks{$plink}};
	
	$nodedelays{$delayid++} = [$nodeB,$portB,$portD,$lan,
			       $member0,$delay,$bandwidth,$lossrate,
			       $member1,$rdelay,$rbandwidth,$rlossrate];
	printdb "  Delay: \[$nodeB,$portB,$portD,$lan," .
	    "$delay,$bandwidth,$lossrate,$rdelay,$rbandwidth," .
	    "$rlossrate,$nodeportA,$nodeportC\]\n";

	#
	# Setup portmap using virt members in plink name.
	#
	$portmap{$virtA} = $portA;
	$portmap{$virtC} = $portC;
Leigh B. Stoller's avatar
Leigh B. Stoller committed
1305
	printdb "  Portmap:\n";
1306
1307
1308
1309
	printdb "    $virtA = $portA\n";
	printdb "    $virtC = $portC\n";
    }
    elsif (($lan,$virtA) = ($plink =~ m|^linkdelaysrc/([^/]+)/(.+)$|)) {
1310
1311
1312
1313
	# trivial links do not have physical links, so no delay nodes.
	if ($trivial) {
	    next;
	}
Leigh B. Stoller's avatar
Leigh B. Stoller committed
1314
1315
	# Node may have multiple entries in lan.
	# Delay node is nodeB and portB.
1316
	# Other end of delay node will be given by corresponding plink
Leigh B. Stoller's avatar
Leigh B. Stoller committed
1317
1318
	#  linkdelaydst/lan/node where nodeportA will the LAN node and
	#  nodeportB will be the other end of the delay node.
1319
1320
	
	($nodeportC,$nodeportD) = @{$plinks{"linkdelaydst/$lan/$virtA"}};
Leigh B. Stoller's avatar
Leigh B. Stoller committed
1321
1322
1323
	($nodeC,$portC) = split(":",$nodeportC);
	($nodeD,$portD) = split(":",$nodeportD);
	printdb "LAN delay src: other end = $nodeportC $nodeportD\n";
1324

1325
1326
1327
1328
1329
1330
1331
1332
	#
	# Construct a name for the delay link. This has to be unique
	# since now (with virtual nodes) we can have multiple vnodes
	# from the same lan, on the same pnode, without using veths.
	# Multiple routing tables made this possible.
	#
	my $dlink = $lan . "/dlink/" . (split(":", $virtA))[0];

Leigh B. Stoller's avatar
Leigh B. Stoller committed
1333
	printdb "  VLANS:\n";
1334
	AddVlan("link", $dlink, $nodeportA, $nodeportB);
1335
	AddVlan("lan",  $lan,   $nodeportD);
Leigh B. Stoller's avatar
Leigh B. Stoller committed
1336
	
1337
1338
1339
1340
1341
1342
1343
	my ($member0,$delay,$bandwidth,$loss,
	    $member1,$rdelay,$rbandwidth,$rloss) = @{$delaylinks{$plink}};
	
	$nodedelays{$delayid++} = [$nodeB,$portB,$portD,$lan,
				   $member0,$delay,$bandwidth,$loss,
				   $member1,$rdelay,$rbandwidth,$rloss];
	printdb "  Delays: \[$nodeB,$portB,$portD,$lan," .
Christopher Alfeld's avatar
Christopher Alfeld committed
1344
	    "$delay,$bandwidth,$loss,$rdelay,$rbandwidth,$rloss," .
1345
	    "$nodeportA,$nodeportC\]\n";
Shashi Guruprasad's avatar
Shashi Guruprasad committed
1346

1347
	$portmap{$virtA} = $portA;