GeniAggregate.pm.in 32.5 KB
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#!/usr/bin/perl -wT
#
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# GENIPUBLIC-COPYRIGHT
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# Copyright (c) 2008-2009 University of Utah and the Flux Group.
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# All rights reserved.
#
package GeniAggregate;

#
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# Some simple aggregate stuff.
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#
use strict;
use Exporter;
use vars qw(@ISA @EXPORT);

@ISA    = "Exporter";
@EXPORT = qw ( );

# Must come after package declaration!
use GeniDB;
use GeniCredential;
use GeniCertificate;
use GeniSliver;
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use GeniSlice;
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use GeniRegistry;
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use GeniUtil;
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use GeniHRN;
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use emutil;
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use Lan;
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use Data::Dumper;
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use English;
use overload ('""' => 'Stringify');
use XML::Simple;
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use POSIX qw(strftime);
use Time::Local;
use Date::Parse;
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# Configure variables
my $TB		   = "@prefix@";
my $TBOPS          = "@TBOPSEMAIL@";
my $TBAPPROVAL     = "@TBAPPROVALEMAIL@";
my $TBAUDIT   	   = "@TBAUDITEMAIL@";
my $BOSSNODE       = "@BOSSNODE@";
my $OURDOMAIN      = "@OURDOMAIN@";
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my $PGENIDOMAIN    = "@PROTOGENI_DOMAIN@";
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my $SIGNCRED	   = "$TB/sbin/signgenicred";
my $VERIFYCRED	   = "$TB/sbin/verifygenicred";
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my $NODEREBOOT	   = "$TB/bin/node_reboot";
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my $VNODESETUP     = "$TB/sbin/vnode_setup";
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my $POWER          = "$TB/bin/power";
my $SNMPIT         = "$TB/bin/snmpit";
my $NAMEDSETUP     = "$TB/sbin/named_setup";
my $EXPORTS_SETUP  = "$TB/sbin/exports_setup";
my $GENTOPOFILE    = "$TB/libexec/gentopofile";
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# Cache of instances to avoid regenerating them.
my %aggregates     = ();
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BEGIN { use GeniUtil; GeniUtil::AddCache(\%aggregates); }
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#
# Lookup by idx, or uuid.
#
sub Lookup($$)
{
    my ($class, $token) = @_;
    my $query_result;
    my $idx;

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    if (GeniHRN::IsValid($token)) {
	return undef if !GeniHRN::Authoritative($token, "@OURDOMAIN@");

	my ($authority, $type, $id) = GeniHRN::Parse($token);
	return undef if $type ne "sliver";
	$idx = $id;
    }
    elsif ($token =~ /^\d+$/) {
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	$idx = $token;
    }
    elsif ($token =~ /^\w+\-\w+\-\w+\-\w+\-\w+$/) {
	$query_result =
	    DBQueryWarn("select idx from geni_aggregates ".
			"where uuid='$token'");
	    return undef
		if (! $query_result || !$query_result->numrows);

	    ($idx) = $query_result->fetchrow_array();
    }
    else {
	return undef;
    }
    # Look in cache first
    return $aggregates{"$idx"}
        if (exists($aggregates{"$idx"}));

    $query_result =
	DBQueryWarn("select * from geni_aggregates where idx='$idx'");
    
    return undef
	if (!$query_result || !$query_result->numrows);

    my $self              = {};
    $self->{'AGGREGATE'}  = $query_result->fetchrow_hashref();
    $self->{'CREDENTIAL'} = undef;
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    $self->{'SLICE'}      = undef;
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    $self->{'PARENT'}     = undef;
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    # Bless into sub package if called for.
    my $type = $self->{'AGGREGATE'}->{'type'};
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    if (defined($type) && $type ne "" && $type ne "Aggregate") {
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	bless($self, $class . "::" . $type);
    }
    else {
	bless($self, $class);
    }
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    #
    # Grab the certificate, since we will probably want it.
    #
    my $uuid = $self->{'AGGREGATE'}->{'uuid'};
    my $certificate = GeniCertificate->Lookup($uuid);
    if (!defined($certificate)) {
	print STDERR "Could not find certificate for aggregate $idx ($uuid)\n";
	return undef;
    }
    $self->{'CERTIFICATE'} = $certificate;
    
    # Add to cache. 
    $aggregates{$self->{'AGGREGATE'}->{'idx'}} = $self;
    
    return $self;
}

#
# Stringify for output.
#
sub Stringify($)
{
    my ($self) = @_;
    
    my $uuid = $self->uuid();
    my $idx  = $self->idx();

    return "[GeniAggregate: $uuid, IDX: $idx]";
}

#
# Create a Geni aggregate in the DB. This happens on the server side only
# for now. The client side does not actually know its an aggregate, at
# least not yet.
#
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sub Create($$$$$$)
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{
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    my ($class, $slice, $owner, $aggregate_type, $hrn, $nickname) = @_;
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    my @insert_data = ();

    # Every aggregate gets a new unique index.
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    my $idx = TBGetUniqueIndex('next_sliver', 1);
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    # Create a cert pair, which gives us a new uuid.
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    my $urn = GeniHRN::Generate( "@OURDOMAIN@", "sliver", $idx );
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    my $certificate = GeniCertificate->Create("aggregate", $urn, $hrn, $TBOPS);
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    if (!defined($certificate)) {
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	print STDERR "GeniAggregate::Create: ".
	    "Could not generate new certificate and UUID for $hrn\n";
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	return undef;
    }
    my $uuid        = $certificate->uuid();
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    my $slice_uuid  = $slice->uuid();
    my $owner_uuid  = $owner->uuid();
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    $aggregate_type = "Aggregate"
    	if (! defined($aggregate_type));

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    # Now tack on other stuff we need.
    push(@insert_data, "created=now()");
    push(@insert_data, "idx='$idx'");
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    push(@insert_data, "hrn=" . DBQuoteSpecial($hrn));
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    push(@insert_data, "nickname=" . DBQuoteSpecial($nickname));
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    push(@insert_data, "uuid='$uuid'");
    push(@insert_data, "creator_uuid='$owner_uuid'");
    push(@insert_data, "slice_uuid='$slice_uuid'");
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    push(@insert_data, "type='$aggregate_type'");
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    # Insert into DB.
    if (!DBQueryWarn("insert into geni_aggregates set " .
		     join(",", @insert_data))) {
	$certificate->Delete();
	return undef;
    }
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    my $aggregate = GeniAggregate->Lookup($idx);
    return undef
	if (!defined($aggregate));

    if (GeniUsage->NewAggregate($aggregate, $slice, $owner)) {
	print STDERR "GeniAggregate::Create: ".
	    "GeniUsage->NewAggregate($aggregate) failed\n";
    }
    return $aggregate;
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}
# accessors
sub field($$) { return ((! ref($_[0])) ? -1 : $_[0]->{'AGGREGATE'}->{$_[1]}); }
sub idx($)		{ return field($_[0], "idx"); }
sub uuid($)		{ return field($_[0], "uuid"); }
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sub nickname($)		{ return field($_[0], "nickname"); }
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sub type($)		{ return field($_[0], "type"); }
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sub slice_uuid($)	{ return field($_[0], "slice_uuid"); }
sub creator_uuid($)	{ return field($_[0], "creator_uuid"); }
sub created($)		{ return field($_[0], "created"); }
sub credential_idx($)	{ return field($_[0], "credential_idx"); }
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sub aggregate_idx($)	{ return field($_[0], "aggregate_idx"); }
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sub status($)		{ return field($_[0], "status"); }
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sub state($)		{ return field($_[0], "state"); }
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sub cert($)		{ return $_[0]->{'CERTIFICATE'}->cert(); }
sub GetCertificate($)   { return $_[0]->{'CERTIFICATE'}; }

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# An alias so that slivers look like aggregates.
sub resource_type($)	{ return field($_[0], "type"); }

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# Return the URN.
sub urn($)
{
    my ($self) = @_;

    return GeniHRN::Generate("@OURDOMAIN@", "sliver", $self->idx());
}

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#
# Destroy all the slivers in the aggregate, and then the aggregate if there
# is nothing in it. Leave it around if something goes wrong.
#
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sub Delete($$)
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{
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    my ($self, $purge) = @_;
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    my $broken = 0;

    return -1
	if (! ref($self));

    my @slivers = ();
    if ($self->SliverList(\@slivers) != 0) {
	print STDERR "Could not get sliver list for $self\n";
	return -1;
    }
    foreach my $sliver (@slivers) {
	if ($sliver->status() eq "broken") {
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	    print STDERR "Could not delete 'broken' $sliver from $self\n";
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	    $broken++;
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	    last;
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	}
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	if ($sliver->Delete($purge) != 0) {
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	    print STDERR "Could not delete $sliver from $self\n";
	    $sliver->SetStatus("broken");
	    $broken++;
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	    last;
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	}
    }
    return -1
	if ($broken);
    
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    if (GeniUsage->DestroyAggregate($self, $purge)) {
	print STDERR "GeniAggregate::Delete: ".
	    "GeniUsage->DestroyAggregate($self) failed\n";
    }
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    my $idx  = $self->idx();
    my $uuid = $self->uuid();

    DBQueryWarn("delete from geni_credentials where this_uuid='$uuid'")
	or return -1;
    DBQueryWarn("delete from geni_certificates where uuid='$uuid'")
	or return -1;
    DBQueryWarn("delete from geni_aggregates where idx='$idx'")
	or return -1;
    
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    # Delete from cache. 
    delete($aggregates{$idx});

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    return 0;
}

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#
# Cons up an hrn.
#
sub hrn($)
{
    my ($self) = @_;

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    my $hrn = field($self, "hrn");

    if (defined($hrn) && $hrn ne "") {
	return $hrn;
    }
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    return "${PGENIDOMAIN}.aggregate_" . $self->idx();
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}

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#
# Look up toplevel aggregate for a locally instantiated slice. 
#
sub SliceAggregate($$)
{
    my ($class, $slice) = @_;

    my $slice_uuid = $slice->uuid();
    my @result = ();

    my $query_result =
	DBQueryWarn("select idx from geni_aggregates ".
		    "where slice_uuid='$slice_uuid' and type='Aggregate'");
    return undef
	if (!$query_result);
    return undef
	if ($query_result->numrows != 1);

    my ($idx) = $query_result->fetchrow_array();
    my $aggregate = GeniAggregate->Lookup($idx);
    return undef
	if (!defined($aggregate));

    return $aggregate;
}

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#
# Look up a list of aggregates for a locally instantiated slice. 
# Used by the CM.
#
sub SliceAggregates($$$)
{
    my ($class, $slice, $pref) = @_;

    my $slice_uuid = $slice->uuid();
    my @result = ();

    my $query_result =
	DBQueryWarn("select idx from geni_aggregates ".
		    "where slice_uuid='$slice_uuid'");
    return -1
	if (!$query_result);

    while (my ($idx) = $query_result->fetchrow_array()) {
	my $aggregate = GeniAggregate->Lookup($idx);
	return -1
	    if (!defined($aggregate));
	push(@result, $aggregate);
    }
    @$pref = @result;
    return 0;
}

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#
# List of slivers for this aggregate.
#
sub SliverList($$)
{
    my ($self, $pref) = @_;
    my @result = ();
    
    return -1
	if (! (ref($self) && ref($pref)));

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    my $idx  = $self->idx();
    my $uuid = $self->uuid();
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    my $query_result =
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	DBQueryWarn("select idx from geni_slivers ".
		    "where aggregate_uuid='$uuid'");
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    return -1
	if (!$query_result);

    while (my ($sliver_idx) = $query_result->fetchrow_array()) {
	my $sliver = GeniSliver->Lookup($sliver_idx);
	if (!defined($sliver)) {
	    print STDERR "Could not find sliver object for $sliver_idx\n";
	    return -1;
	}
	push(@result, $sliver);
    }
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    #
    # And any aggregates that are children.
    #
    $query_result =
	DBQueryWarn("select idx from geni_aggregates ".
		    "where aggregate_idx='$idx'");
    return -1
	if (!$query_result);

    while (my ($aggregate_idx) = $query_result->fetchrow_array()) {
	my $aggregate = GeniAggregate->Lookup($aggregate_idx);
	if (!defined($aggregate_idx)) {
	    print STDERR
		"Could not find aggregate object for $aggregate_idx\n";
	    return -1;
	}
	push(@result, $aggregate);
    }
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    @$pref = @result;
    return 0;
    
}

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#
# Set the aggregate for an aggregate.
#
sub SetAggregate($$)
{
    my ($self, $aggregate) = @_;

    return -1
	if (! (ref($self) && ref($aggregate)));

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    my $idx      = $self->idx();
    my $agg_idx  = $aggregate->idx();
    my $agg_uuid = $aggregate->uuid();
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    return -1
	if (!DBQueryWarn("update geni_aggregates set ".
			 "  aggregate_idx='$agg_idx' ".
			 "where idx='$idx'"));
    
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    if (!DBQueryWarn("update aggregate_history set ".
		     "  aggregate_uuid='$agg_uuid' ".
		     "where idx='$idx'")) {
	print STDERR "GeniAggregate::SetAggregate: ".
	    "Failed to update aggregate_history for $self\n";
    }

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    $self->{'AGGREGATE'}->{'aggregate_idx'} = $agg_idx;
    $self->{'PARENT'} = $aggregate;
    return 0;
}

#
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# Get the aggregate for an aggregate.
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#
sub GetAggregate($)
{
    my ($self) = @_;

    return undef
	if (! ref($self));

    return $self->{'PARENT'} if (defined($self->{'PARENT'}));
    return undef
	if (!defined($self->aggregate_idx()));

    my $aggregate = GeniAggregate->Lookup($self->aggregate_idx());
    if (!defined($aggregate)) {
	print STDERR "Could not get aggregate object associated with $self\n";
	return undef;
    }
    $self->{'PARENT'} = $aggregate;
    return $aggregate;
}

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#
# Is object in the aggregate.
#
sub IsMember($$)
{
    my ($self, $object) = @_;

    return -1
	if (! (ref($self) && ref($object)));

    my $aggregate = $object->GetAggregate();
    return 0
	if (!$aggregate);
    return -1
	if ($self->idx() != $aggregate->idx());
    return 1;
}

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#
# Set the status for the aggregate
#
sub SetStatus($$)
{
    my ($self, $status) = @_;

    return undef
	if (! ref($self));

    my $idx = $self->idx();
    
    return -1
	if (!DBQueryWarn("update geni_aggregates set ".
			 "  status='$status' ".
			 "where idx='$idx'"));
    
    $self->{'AGGREGATE'}->{'status'} = $status;
    return 0;
}

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#
# Set the state for the aggregate
#
sub SetState($$)
{
    my ($self, $state) = @_;

    return undef
	if (! ref($self));

    my $idx = $self->idx();
    
    return -1
	if (!DBQueryWarn("update geni_aggregates set ".
			 "  state='$state' ".
			 "where idx='$idx'"));
    
    $self->{'AGGREGATE'}->{'state'} = $state;
    return 0;
}

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#
# Get the slice for the aggregate.
#
sub GetSlice($)
{
    my ($self) = @_;

    return undef
	if (! ref($self));

    return $self->{'SLICE'} if (defined($self->{'SLICE'}));

    if (!defined($self->slice_uuid())) {
	print STDERR "No slice associated with $self\n";
	return undef;
    }
    my $slice = GeniSlice->Lookup($self->slice_uuid());
    if (!defined($slice)) {
	print STDERR "Could not get slice object associated with $self\n";
	return undef;
    }
    $self->{'SLICE'} = $slice;
    return $slice;
}

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#
# Create a signed credential for this aggregate, issued to the provided user.
# The credential will grant all permissions for now.
#
# Should we store these credentials in the DB, recording what we hand out?
#
sub NewCredential($$)
{
    my ($self, $owner) = @_;

    return undef
	if (! (ref($self) && ref($owner)));

    my $credential = GeniCredential->Create($self, $owner);
    if (!defined($credential)) {
	print STDERR "Could not create credential for $self, $owner\n";
	return undef;
    }
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    if (defined($self->nickname())) {
	$credential->AddExtension("nickname", $self->nickname());
    }
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    if ($credential->Sign($self->GetCertificate()) != 0) {
	print STDERR "Could not sign credential for $self, $owner\n";
	return undef;
    }
    return $credential;
}

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#
# Get the manifest for an aggregate. Returns the XML string.
#
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sub GetManifest($$)
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{
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    my ($self, $asxml) = @_;
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    return undef
	if (! ref($self));

    my $slice      = $self->GetSlice();
    return undef
	if (!defined($slice));
    my $slice_uuid = $slice->uuid();

    my $query_result =
	DBQueryWarn("select manifest from geni_manifests ".
		    "where slice_uuid='$slice_uuid'");
    
    if (!$query_result || !$query_result->numrows) {
	print STDERR "GetManifest: Could not locate manifest for $self\n";
	return undef;
    }
    my ($xml) = $query_result->fetchrow_array();

    my $manifest =
	eval { XMLin($xml, KeyAttr => [],
		     ForceArray => ["node", "link", "interface",
				    "interface_ref", "linkendpoints"]) };
    if ($@) {
	print STDERR "XMLin error reading manifest: $@\n";
	return undef;
    }
    #
    # Update the manifest ticket to reflect the current expiration time.
    #
    $manifest->{'valid_until'} =
	POSIX::strftime("20%y-%m-%dT%H:%M:%S",
			gmtime(str2time($slice->expires())));

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    return $manifest
	if (!$asxml);
    
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    $xml = eval { XMLout($manifest, "NoAttr" => 1, RootName => "manifest") };
    if ($@) {
	print STDERR "XMLout error on manifest: $@\n";
	return undef;
    }
    return $xml;
}

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#
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# Process the manifest. Just hand off to the slivers.
#
sub ProcessManifest($$)
{
    my ($self, $manifest) = @_;

    return -1
	if (! ref($self));

    my @slivers = ();
    if ($self->SliverList(\@slivers) != 0) {
	print STDERR "Could not get sliver list for $self\n";
	return -1;
    }

    foreach my $sliver (@slivers) {
	next
	    if (ref($sliver) ne "GeniSliver::Node");

	if ($sliver->ProcessManifest($manifest) != 0) {
	    return -1;
	}
    }
    return 0;
}

#
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# Start all the slivers in the aggregate. Start is special since it
# sorta means reboot, and the only thing we reboot are nodes. And,
# since we might have multiple vnodes on a pnode, we want to be efficient
# about it.
#
# XXX Is is assumed that there is a single toplevel aggregate for the
# slice, so we can get all the nodes.
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#
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sub Start($$$)
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{
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    my ($self, $version, $restart) = @_;
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    return -1
	if (! ref($self));
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    $restart = 0
	if (!defined($restart));
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    my $experiment = Experiment->Lookup($self->slice_uuid());
    if (!defined($experiment)) {
	print STDERR "Could not map $self to its experiment\n";
	return -1;
    }
    my $pid = $experiment->pid();
    my $eid = $experiment->eid();

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    my @slivers = ();
    if ($self->SliverList(\@slivers) != 0) {
	print STDERR "Could not get sliver list for $self\n";
	return -1;
    }
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    my %pnodes = ();
    my %vnodes = ();
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    foreach my $sliver (@slivers) {
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	next
	    if (ref($sliver) ne "GeniSliver::Node");

	my $node = Node->Lookup($sliver->uuid());
	if (!defined($node)) {
	    print STDERR "Could not map $sliver to a node\n";
	    return -1;
	}
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	my $reservation = $node->Reservation();
	if (!defined($reservation)) {
	    print STDERR "$node no long belongs to $self\n";
	    return -1;
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	}
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	if ($reservation->SameExperiment($experiment)) {
	    if ($node->isvirtnode()) {
		$vnodes{$node->node_id} = $node;
	    }
	    else {
		# node_reboot is smart enough to know that if a pnode
		# is rebooted it can ignore the vnodes on it, so do
		# not optimize this here.
		$pnodes{$node->node_id} = $node;
	    }
	}
	else {
	    print STDERR "$node is reserved to another, not $self\n";
	    # Signal error so we can look at what happened.
	    return -1;
	}
    }
    #
    # Cull out vnodes that are going to get rebooted cause the
    # physnode is getting rebooted. 
    #
    my %tmp = %vnodes;
    foreach my $vnode (values(%vnodes)) {
	if (!exists($pnodes{$vnode->phys_nodeid()})) {
	    $tmp{$vnode->node_id()} = $vnode;
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	}
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    }
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    %vnodes = %tmp;

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    if ($version >= 2) {
	if (system("$GENTOPOFILE $pid $eid")) {
	    print STDERR "$GENTOPOFILE failed\n";
	    return -1;
	}
	if (system("$EXPORTS_SETUP")) {
	    print STDERR "$EXPORTS_SETUP failed\n";
	    return -1;
	}
	# The nodes will not boot locally unless there is a DNS record.
	if (system("$NAMEDSETUP")) {
	    print STDERR "$NAMEDSETUP failed\n";
	    return -1;
	}
	if ($restart) {
	    my @diff = ();
	    my @same = ();
	    
	    if (Lan->CompareVlansWithSwitches($experiment, \@diff, \@same)) {
		print STDERR "CompareVlansWithSwitches failed!\n";
		return -1;
	    }
	    if (@diff) {
		system("$SNMPIT -f ". join(" ", map("-o $_", @diff)));
		if ($?) {
		    print STDERR "Failed to remove obsolete VLANs.\n";
		    return -1;
		}
	    }
	}
	system("$SNMPIT -t $pid $eid");
	if ($?) {
	    print STDERR "$SNMPIT failed\n";
	    return -1;
	}
    }

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    #
    # Now reboot the physical nodes, then any leftover virtual nodes.
    #
    if (keys(%pnodes)) {
	my @node_ids = keys(%pnodes);

	#
	# Should waiting be an option?
	#
	system("$NODEREBOOT @node_ids");
	return -1
	    if ($?);
    }
    if (keys(%vnodes)) {
	my @node_ids = keys(%vnodes);
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	#
	# Should waiting be an option?
	#
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	system("$VNODESETUP -j -m $pid $eid @node_ids");
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	return -1
	    if ($?);
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    }
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    #
    # Worked? Set the new state. Needs more thought ...
    #
    foreach my $sliver (@slivers) {
	$sliver->SetState("started")
	    if (ref($sliver) eq "GeniSliver::Node");
    }
    return 0;
}

#
# Stop all the slivers in the aggregate. Stop is brutal, better to
# use restart!
#
sub Stop($$)
{
    my ($self, $version) = @_;

    return -1
	if (! ref($self));

    my $experiment = Experiment->Lookup($self->slice_uuid());
    if (!defined($experiment)) {
	print STDERR "Could not map $self to its experiment\n";
	return -1;
    }
    my $pid = $experiment->pid();
    my $eid = $experiment->eid();

    my @slivers = ();
    if ($self->SliverList(\@slivers) != 0) {
	print STDERR "Could not get sliver list for $self\n";
	return -1;
    }
    my %pnodes = ();
    my %vnodes = ();

    foreach my $sliver (@slivers) {
	next
	    if (ref($sliver) ne "GeniSliver::Node");

	my $node = Node->Lookup($sliver->uuid());
	if (!defined($node)) {
	    print STDERR "Could not map $sliver to a node\n";
	    return -1;
	}
	my $reservation = $node->Reservation();
	if (!defined($reservation)) {
	    print STDERR "$node no long belongs to $self\n";
	    return -1;
	}
	if ($reservation->SameExperiment($experiment)) {
	    if ($node->isvirtnode()) {
		$vnodes{$node->node_id} = $node;
	    }
	    else {
		# node_reboot is smart enough to know that if a pnode
		# is rebooted it can ignore the vnodes on it, so do
		# not optimize this here.
		$pnodes{$node->node_id} = $node;
	    }
	}
	else {
	    print STDERR "$node is reserved to another, not $self\n";
	    # Signal error so we can look at what happened.
	    return -1;
	}
    }
    #
    # Cull out vnodes that are going to get killed cause the
    # physnode is getting powered down.
    #
    my %tmp = %vnodes;
    foreach my $vnode (values(%vnodes)) {
	if (!exists($pnodes{$vnode->phys_nodeid()})) {
	    $tmp{$vnode->node_id()} = $vnode;
	}
    }
    %vnodes = %tmp;

    if ($version >= 2) {
	system("$SNMPIT -r $pid $eid");
	if ($?) {
	    print STDERR "$SNMPIT failed\n";
	    return -1;
	}
    }
    
    #
    # Now power down the physical nodes, then any leftover virtual nodes.
    #
    if (keys(%pnodes)) {
	my @node_ids = keys(%pnodes);

	#
	# Should waiting be an option?
	#
	system("$POWER off @node_ids");
	return -1
	    if ($?);
    }
    if (keys(%vnodes)) {
	my @node_ids = keys(%vnodes);

	#
	# Should waiting be an option?
	#
	system("$VNODESETUP -j -k -m $pid $eid @node_ids");
	return -1
	    if ($?);
    }
    #
    # Worked? Set the new state. Needs more thought ...
    #
    foreach my $sliver (@slivers) {
	$sliver->SetState("stopped")
	    if (ref($sliver) eq "GeniSliver::Node");
    }
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    return 0;
}

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#
# Provision all the slivers in the aggregate.
#
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sub Provision($;$)
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{
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    my ($self, $extraargs) = @_;
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    return -1
	if (! ref($self));

    my @slivers = ();
    if ($self->SliverList(\@slivers) != 0) {
	print STDERR "Could not get sliver list for $self\n";
	return -1;
    }
    foreach my $sliver (@slivers) {
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	if ($sliver->Provision($extraargs) != 0) {
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	    print STDERR "Could not provision $sliver in $self\n";
	    next;
	}
    }
    return 0;
}

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#
# Unprovision all the slivers in the aggregate.
#
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sub UnProvision($;$)
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{
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    my ($self, $nophysfree) = @_;
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    return -1
	if (! ref($self));

    my @slivers = ();
    if ($self->SliverList(\@slivers) != 0) {
	print STDERR "Could not get sliver list for $self\n";
	return -1;
    }
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    #
    # Might be an aggregate that includes link aggregates. Lets do those
    # first to avoid work when tearing down the nodes.
    #
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    my @links = ();
    my @nodes = ();
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    foreach my $sliver (@slivers) {
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	if (ref($sliver) eq "GeniAggregate::Link" ||
	    ref($sliver) eq "GeniAggregate::Tunnel") {
	    push(@links, $sliver);
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	}
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	elsif (ref($sliver) eq "GeniAggregate") {
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	    print STDERR "Unprovision: Unknown aggregate $sliver in $self\n";
	    return -1;
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	}
	elsif (ref($sliver) eq "GeniSliver::Node") {
	    push(@nodes, $sliver);
	}
    }
    foreach my $sliver (@links) {
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	if ($sliver->UnProvision() != 0) {
	    print STDERR "Could not unprovision $sliver in $self\n";
	    $sliver->SetStatus("broken");
	    next;
	}
    }
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    foreach my $sliver (@nodes) {
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	if ($sliver->UnProvision($nophysfree) != 0) {
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	    print STDERR "Could not unprovision $sliver in $self\n";
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	    $sliver->SetStatus("broken");
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	    next;
	}
    }
    return 0;
}

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sub ComputeState($)
{
    my ($self) = @_;
    my $started = 0;
    my $stopped = 0;
    my $unknown = 0;
    my $count   = 0;

    return -1
	if (! ref($self));

    my @slivers = ();
    if ($self->SliverList(\@slivers) != 0) {
	print STDERR "Could not get sliver list for $self\n";
	return -1;
    }
    
    foreach my $sliver (@slivers) {
	#
	# Just nodes for now.
	#
	next
	    if (ref($sliver) ne "GeniSliver::Node");

	my $status;
	my $state = $sliver->state();
	if (!defined($state)) {
	    print STDERR "Could not determine state for $sliver in $self\n";
	    return -1;
	}
	if ($sliver->ComputeStatus(\$status)) {
	    print STDERR "Could not determine status for $sliver in $self\n";
	    return -1;
	}
	if ($state eq "started") {
	    $started++;
	}
	elsif ($state eq "stopped") {
	    $stopped++;
	}
	else {
	    $unknown++;
	}
	$count++;
    }
    if ($stopped == $count) {
	$self->SetState("stopped");
    }
    elsif ($started == $count) {
	$self->SetState("started");
    }
    else {
	$self->SetState("mixed");
    }
    return 0;
}

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############################################################################
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#
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# Link aggregates need special handling.
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#
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package GeniAggregate::Link;
use vars qw(@ISA);
@ISA = "GeniAggregate";

use GeniDB;
use GeniSlice;
use GeniCredential;
use GeniCertificate;
use GeniAggregate;
use Experiment;
use Interface;

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sub Create($$$)
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{
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    my ($class, $slice, $owner, $linkname) = @_;

    #
    # Form an hrn using the slicename and linkname
    #
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    my $hrn = "${PGENIDOMAIN}." . $slice->slicename() . "." . $linkname;
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    return GeniAggregate->Create($slice, $owner, "Link", $hrn, $linkname);
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}

#
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# Provision all the slivers in the aggregate. For links, this is done
# for the entire aggregate (experiment) at once.
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#
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sub Provision($;$)
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{
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    my ($self, $extraargs) = @_;
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    return -1
	if (! ref($self));

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    $self->SetStatus("ready");
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    return 0;

  bad:
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    return -1
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}
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#
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# Unprovision all the slivers in the aggregate. For links, this is done
# for the entire aggregate (experiment) at once.
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#
sub UnProvision($)
{
    my ($self) = @_;

    return -1
	if (! ref($self));

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    return 0;
}

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#
# Nothing to do yet.
#
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sub Start($$)
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{
    my ($self) = @_;

    return -1
	if (! ref($self));

    return 0;
}

#
# Nothing to do yet.
#
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sub Stop($$)
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{
    my ($self) = @_;

    return -1
	if (! ref($self));

    return 0;
}


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############################################################################
#
# Tunnel aggregates need special handling too
#
package GeniAggregate::Tunnel;
use vars qw(@ISA);
@ISA = "GeniAggregate";

use GeniDB;
use GeniSlice;
use GeniCredential;
use GeniCertificate;
use GeniRegistry;
use GeniAggregate;
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use GeniUtil;
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use Experiment;
use Interface;
use Data::Dumper;

sub Create($$$$$$)
{
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    my ($class, $slice, $owner, $node1sliver, $node2sliver,
	$linkrspec, $node1rspec, $node2rspec) = @_;
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    my $clearinghouse;

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    my $linkname = $linkrspec->{"nickname"} || $linkrspec->{"virtual_id"};
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    return undef
	if (!defined($linkname));
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    my @interfaces = @{ $linkrspec->{'interface_ref'} };
    
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    my $experiment = Experiment->Lookup($slice->uuid());
    if (!defined($experiment)) {
	print STDERR "Could not map $slice to its experiment\n";
	return -1;
    }

    #
    # Form an hrn using the slicename and linkname
    #
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    my $hrn = "${PGENIDOMAIN}." . $slice->slicename() . "." . $linkname;
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    my $aggregate = GeniAggregate->Create($slice, $owner, "Tunnel",
					  $hrn, $linkname);
    goto bad
	if (!defined($aggregate));

    #
    # Create a tunnel entry in the lans table.
    #
    my $tunnel = Tunnel->Create($experiment, $aggregate->uuid(), "", "gre");
    if (!defined($tunnel)) {
	print STDERR "Could not create tunnel entry in lans table\n";
	return undef;
    }

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    my $iface1ref = $interfaces[0];
    my $iface2ref = $interfaces[1];
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    # These are the ips of the tunnel.
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    my $ip1      = $iface1ref->{'tunnel_ip'};
    my $ip2      = $iface2ref->{'tunnel_ip'};
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    my $ctrlip1;
    my $ctrlip2;
    my $iface1;
    my $iface2;

    # We need the control network addresses, but it is possible that
    # one of the nodes is not on this testbed.
    if (defined($node1sliver)) {
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	my $node1 = Node->Lookup($node1sliver->resource_uuid());
	if (!defined($node1)) {
	    print STDERR "Tunnel: Could not lookup node for $node1sliver\n";
	    goto bad;
 	}
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	my $interface = Interface->LookupControl($node1);
	goto bad
	    if (!defined($interface));
	$ctrlip1 = $interface->IP();
	$iface1  = $tunnel->AddMember($node1);
	if (!defined($iface1)) {
	    print STDERR "Could not add $node1 to $tunnel\n";
	    goto bad;
	}
    }
    else {
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	my $component = GeniComponent->Lookup($node1rspec->{'component_uuid'});
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	my $blob;
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	if (!defined($component)) {
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	    #
	    # Need to ask the clearinghouse where this node comes from.
	    #
	    $clearinghouse = GeniRegistry::ClearingHouse->Create();
	
	    if ($clearinghouse->Resolve($node1rspec->{'component_uuid'},
					"Component", \$blob) != 0) {
		print STDERR "Could not lookup node at clearinghouse\n";
		print STDERR Dumper($node1rspec);
		goto bad;
	    }
	    my $certificate = GeniCertificate->LoadFromString($blob->{'gid'});
	    goto bad
		if (!defined($certificate));
	
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	    $component = GeniComponent->CreateFromCertificate($certificate);
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	    if (!defined($component)) {
		print STDERR "Could not create component from $certificate\n";
		goto bad;
	    }
	}
	my $credential = GeniRegistry::Client->CreateCredential($component);
	if (!defined($credential)) {
	    print STDERR "Could not create a credential for $component\n";
	    goto bad;

	}
	my $registry = GeniRegistry::Client->Create($component, undef,
						    $credential);
	if (!defined($registry)) {
	    print STDERR "Could not create a registry client for $component\n";
	    goto bad;
	}
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	$registry->Resolve($node1rspec->{'component_uuid'}, "Node", \$blob);
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	$ctrlip1 = $blob->{'physctrl'}
	    if (defined($blob) && exists($blob->{'physctrl'}));
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	if (!defined($ctrlip1)) {
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	    print STDERR "Could not get control IP for ".
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		"$node1rspec->{'component_uuid'} at $component\n";
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	    goto bad;
	}
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    }
    if (defined($node2sliver)) {
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	my $node2 = Node->Lookup($node2sliver->resource_uuid());
	if (!defined($node2)) {
	    print STDERR "Tunnel: Could not lookup node for $node2sliver\n";
	    goto bad;
 	}
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	my $interface = Interface->LookupControl($node2);
	goto bad
	    if (!defined($interface));
	$ctrlip2 = $interface->IP();
	$iface2  = $tunnel->AddMember($node2);
	if (!defined($iface2)) {
	    print STDERR "Could not add $node2 to $tunnel\n";
	    goto bad;
	}
    }
    else {
	my $blob;
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	my $component = GeniComponent->Lookup($node2rspec->{'component_uuid'});
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	if (!defined($component)) {
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	    #
	    # Need to ask the clearinghouse where this node comes from.
	    #
	    $clearinghouse = GeniRegistry::ClearingHouse->Create();
	
	    if ($clearinghouse->Resolve($node2rspec->{'component_uuid'},
					"Component", \$blob) != 0) {
		print STDERR "Could not lookup node at clearinghouse\n";
		print STDERR Dumper($node2rspec);
		goto bad;
	    }
	    my $certificate = GeniCertificate->LoadFromString($blob->{'gid'});
	    goto bad
		if (!defined($certificate));
	
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	    $component = GeniComponent->CreateFromCertificate($certificate);
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	    if (!defined($component)) {
		print STDERR "Could not create component from $certificate\n";
		goto bad;
	    }
	}
	my $credential = GeniRegistry::Client->CreateCredential($component);
	if (!defined($credential)) {
	    print STDERR "Could not create a credential for $component\n";
	    goto bad;

	}
	my $registry = GeniRegistry::Client->Create($component, undef,
						    $credential);
	if (!defined($registry)) {
	    print STDERR "Could not create a registry client for $component\n";
	    goto bad;
	}
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	$registry->Resolve($node2rspec->{'component_uuid'}, "Node", \$blob);
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	$ctrlip2 = $blob->{'physctrl'}
	    if (defined($blob) && exists($blob->{'physctrl'}));
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	if (!defined($ctrlip2)) {
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	    print STDERR "Could not get control IP for ".
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		"$node2rspec->{'component_uuid'} at $component\n";
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	    goto bad;
	}
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    }
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    # print STDERR "$ip1, $ip2, $ctrlip1, $ctrlip2\n";
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    if (defined($iface1)) {
	$iface1->SetAttribute("tunnel_ip", $ip1);
	$iface1->SetAttribute("tunnel_peerip", $ip2);
	$iface1->SetAttribute("tunnel_srcip", $ctrlip1);
	$iface1->SetAttribute("tunnel_dstip", $ctrlip2);
	$iface1->SetAttribute("tunnel_ipmask", "255.255.255.0");
	$iface1->SetAttribute("tunnel_lan", $linkname);
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	$iface1->SetAttribute("tunnel_unit", $iface1->memberid() + 1);
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	$iface1->SetAttribute("tunnel_style", "gre");
    }
    if (defined($iface2)) {
	$iface2->SetAttribute("tunnel_ip", $ip2);
	$iface2->SetAttribute("tunnel_peerip", $ip1);
	$iface2->SetAttribute("tunnel_srcip", $ctrlip2);
	$iface2->SetAttribute("tunnel_dstip", $ctrlip1);
	$iface2->SetAttribute("tunnel_ipmask", "255.255.255.0");
	$iface2->SetAttribute("tunnel_lan", $linkname);
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	$iface2->SetAttribute("tunnel_unit", $iface2->memberid() + 1);
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	$iface2->SetAttribute("tunnel_style", "gre");
    }
    return $aggregate;

  bad:
    $tunnel->Destroy()
	if (defined($tunnel));
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    $aggregate->Delete(GENI_PURGEFLAG)
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	if (defined($aggregate));
    return undef;
}

#
# All the work done above.
#
sub Provision($)
{
    my ($self) = @_;

    return -1
	if (! ref($self));

    $self->SetStatus("ready");
    return 0;
}

#
# Destroy the underlying tunnel in the lans table.
#
sub UnProvision($)
{
    my ($self) = @_;

    return -1
	if (! ref($self));

    my $experiment = Experiment->Lookup($self->slice_uuid());
    if (!defined($experiment)) {
	print STDERR "Could not map $self to its experiment\n";
	return -1;
    }

    my $tunnel = Tunnel->Lookup($experiment, $self->uuid());
    if (! defined($tunnel)) {
	print STDERR "No tunnel associated with $self\n";
	return 0;
    }
    if ($tunnel->Destroy() != 0) {
	print STDERR "Could not destroy $tunnel\n";
	return -1;
    }
    return 0;
}

#
# Nothing to do yet.
#
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sub Start($$)
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{
    my ($self) = @_;

    return -1
	if (! ref($self));

    return 0;
}

#
# Nothing to do yet.
#
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sub Stop($$)
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{
    my ($self) = @_;

    return -1
	if (! ref($self));

    return 0;
}


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# _Always_ make sure that this 1 is at the end of the file...
1;