Node.pm.in 41.6 KB
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#!/usr/bin/perl -wT
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#
# EMULAB-COPYRIGHT
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# Copyright (c) 2005-2009 University of Utah and the Flux Group.
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# All rights reserved.
#
package Node;
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use strict;
use Exporter;
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use vars qw(@ISA @EXPORT);

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@ISA    = "Exporter";
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@EXPORT = qw();
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# Configure variables
my $TB		= "@prefix@";
my $BOSSNODE    = "@BOSSNODE@";
my $EVENTSYS    = @EVENTSYS@;
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my $WOL         = "$TB/sbin/whol";
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my $OSSELECT    = "$TB/bin/os_select";
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# XXX stinky hack detection
my $ISUTAH	= @TBMAINSITE@;

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# Need this for jail ip assignment.
my $CONTROL_NETMASK = "@CONTROL_NETMASK@";

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use libdb;
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use libtestbed;
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require NodeType;
require Interface;
require Experiment;
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require OSinfo;
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use English;
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use Socket;
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use Data::Dumper;
use overload ('""' => 'Stringify');
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if ($EVENTSYS) {
    require event;
    import event;
}
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use vars qw($NODEROLE_TESTNODE @EXPORT_OK);
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# Exported defs
$NODEROLE_TESTNODE	= 'testnode';

# Why, why, why?
@EXPORT_OK = qw($NODEROLE_TESTNODE);

# Defaults
#
# MFS to boot the nodes into initially
my $MFS_INITIAL = TB_OSID_FREEBSD_MFS();
# Initial event system state to put the nodes into
my $STATE_INITIAL = TBDB_NODESTATE_SHUTDOWN;

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# Cache of instances to avoid regenerating them.
my %nodes	= ();
my $debug	= 0;

# Little helper and debug function.
sub mysystem($)
{
    my ($command) = @_;

    print STDERR "Running '$command'\n"
	if ($debug);
    return system($command);
}
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#
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# Lookup a (physical) node and create a class instance to return.
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#
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sub Lookup($$)
{
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    my ($class, $token) = @_;
    my $nodeid;

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    if ($token =~ /^\w{8}\-\w{4}\-\w{4}\-\w{4}\-\w{12}$/) {
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	my $query_result =
	    DBQueryWarn("select node_id from nodes ".
			"where uuid='$token'");
	    return undef
		if (! $query_result || !$query_result->numrows);

	    ($nodeid) = $query_result->fetchrow_array();
    }
    elsif ($token =~ /^[-\w]+$/) {
	$nodeid = $token;
    }
    else {
	return undef;
    }
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    # Look in cache first
    return $nodes{$nodeid}
        if (exists($nodes{$nodeid}));
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    my $query_result =
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	DBQueryWarn("select * from nodes as n ".
		    "where n.node_id='$nodeid'");
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    return undef
	if (!$query_result || !$query_result->numrows);

    my $self            = {};
    $self->{"DBROW"}    = $query_result->fetchrow_hashref();
    $self->{"RSRV"}     = undef;
    $self->{"TYPEINFO"} = undef;
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    $self->{"ATTRS"}    = undef;
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    bless($self, $class);

    # Add to cache.
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    $nodes{$nodeid} = $self;
    return $self;
}
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#
# Bulk lookup of nodes reserved to an experiment. More efficient.
#
sub BulkLookup($$$)
{
    my ($class, $experiment, $pref) = @_;
    my %nodelist = ();
    my $exptidx  = $experiment->idx();

    my $query_result =
	DBQueryWarn("select n.* from reserved as r ".
		    "left join nodes as n on n.node_id=r.node_id ".
		    "where r.exptidx=$exptidx");

    return -1
	if (!defined($query_result));

    while (my $row = $query_result->fetchrow_hashref()) {
	my $nodeid = $row->{'node_id'};
	my $node;

	if (exists($nodes{$nodeid})) {
	    $node = $nodes{$nodeid};
	    $node->{"DBROW"} = $row;
	}
	else {
	    $node               = {};
	    $node->{"DBROW"}    = $row;
	    bless($node, $class);

	    # Add to cache.
	    $nodes{$nodeid} = $node;
	}
	$node->{"RSRV"}     = undef;
	$node->{"TYPEINFO"} = undef;
	$node->{"ATTRS"}    = undef;
	
	$nodelist{$nodeid} = $node;
    }

    $query_result =
	DBQueryWarn("select r.* from reserved as r ".
		    "where r.exptidx=$exptidx");
    return -1
	if (!defined($query_result));
    
    while (my $row = $query_result->fetchrow_hashref()) {
	my $nodeid = $row->{'node_id'};
	my $node   = $nodelist{$nodeid};

	return -1
	    if (!defined($node));

	$node->{"RSRV"} = $row;
    }

    $query_result =
	DBQueryWarn("select a.* from reserved as r ".
		    "left join node_attributes as a on a.node_id=r.node_id ".
		    "where r.exptidx=$exptidx and a.node_id is not null");
    return -1
	if (!defined($query_result));
    
    while (my $row = $query_result->fetchrow_hashref()) {
	my $nodeid = $row->{'node_id'};
	my $key    = $row->{'attrkey'};
	my $node   = $nodelist{$nodeid};

	return -1
	    if (!defined($node));

	$node->{"ATTRS"}->{$key} = $row;
    }
	
    @$pref = values(%nodelist);
    return 0;
}

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# accessors
sub field($$)  { return ((! ref($_[0])) ? -1 : $_[0]->{'DBROW'}->{$_[1]}); }
sub node_id($)       { return field($_[0], 'node_id'); }
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sub uuid($)          { return field($_[0], 'uuid'); }
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sub type($)          { return field($_[0], 'type'); }
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sub role($)          { return field($_[0], 'role'); }
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sub eventstate($)    { return field($_[0], 'eventstate'); }
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sub allocstate($)    { return field($_[0], 'allocstate'); }
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sub jailflag($)      { return field($_[0], 'jailflag'); }
sub phys_nodeid($)   { return field($_[0], 'phys_nodeid'); }
sub def_boot_osid($) { return field($_[0], 'def_boot_osid'); }
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sub pxe_boot_path($) { return field($_[0], 'pxe_boot_path'); }
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#
# Create a new node.
#
sub Create($$$$)
{
    my ($class, $node_id, $experiment, $argref) = @_;
    my ($control_iface,$virtnode_capacity,$adminmfs,$adminmfs_osid);
    my ($priority, $osid, $opmode, $state);

    my $type = $argref->{'type'};
    my $role = $argref->{'role'};
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    my $uuid;

    if (exists($argref->{'uuid'})) {
	$uuid = $argref->{'uuid'};
    }
    else {
	$uuid = NewUUID();
	if (!defined($uuid)) {
	    print STDERR "Could not generate a UUID!\n";
	    return undef;
	}
    }
    $uuid = DBQuoteSpecial($uuid);
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    my $typeinfo = NodeType->Lookup($type);
    return undef
	if (!defined($typeinfo));

    my $isremote = $typeinfo->isremotenode();

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    if ($role eq "testnode") {
	if ($typeinfo->virtnode_capacity(\$virtnode_capacity)) {
	    print STDERR "*** No virtnode_capacity for $type! Using zero.\n";
	    $virtnode_capacity = 0;
	}
	if ($typeinfo->adminmfs_osid(\$adminmfs_osid)) {
	    print STDERR "*** No adminmfs osid for $type!\n";
	    return undef;
	}
	# Find object for the adminfs.
	if (defined($adminmfs_osid)) {
	    $adminmfs = OSinfo->Lookup($adminmfs_osid);
	}
	else {
	    $adminmfs = OSinfo->Lookup(TBOPSPID(), $MFS_INITIAL);
	}
	if (!defined($adminmfs)) {
	    print STDERR "*** Could not find OSinfo object for adminmfs!\n";
	    return undef;
	}
	$osid   = $adminmfs->osid();
	$opmode = $adminmfs->op_mode();
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    }
    else {
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	$osid   = 0;
	$opmode = "";
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    }
    $state  = $STATE_INITIAL;
    
    #
    # Make up a priority (just used for sorting)
    #
    if ($node_id =~ /^(.*\D)(\d+)$/) {
	$priority = $2;
    }
    else {
	$priority = 1;
    }
    # The list of table we have to clear if anything goes wrong.
    my @cleantables = ("nodes", "node_hostkeys", "node_status",
		       "node_activity", "node_utilization",
		       "node_auxtypes", "reserved");

    DBQueryWarn("insert into nodes set ".
		"  node_id='$node_id', type='$type', " .
		"  phys_nodeid='$node_id', role='$role', ".
		"  priority=$priority, " .
		"  eventstate='$state', op_mode='$opmode', " .
		"  def_boot_osid='$osid', " .
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		"  inception=now(), uuid=$uuid, ".
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		"  state_timestamp=unix_timestamp(NOW()), " .
		"  op_mode_timestamp=unix_timestamp(NOW())")
	or goto bad;

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    if ($role eq "testnode") {
	DBQueryWarn("insert into node_hostkeys (node_id) ".
		    "values ('$node_id')")
	    or goto bad;
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	DBQueryWarn("insert into node_status ".
		    "(node_id, status, status_timestamp) ".
		    "values ('$node_id', 'down', now()) ")
	    or goto bad;
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	DBQueryWarn("insert into node_activity ".
		    "(node_id) values ('$node_id')")
	    or goto bad;
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	DBQueryWarn("insert into node_utilization ".
		    "(node_id) values ('$node_id')")
	    or goto bad;
    }
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    if (defined($experiment)) {
	my $exptidx = $experiment->idx();
	my $pid     = $experiment->pid();
	my $eid     = $experiment->eid();

	# Reserve node to hold it from being messed with.
	print STDERR
	    "*** Reserving new node $node_id to $pid/$eid\n";

	DBQueryWarn("insert into reserved ".
		    "(node_id, exptidx, pid, eid, rsrv_time, vname) ".
		    "values ('$node_id', $exptidx, ".
		    "        '$pid', '$eid', now(), '$node_id')")
	    or goto bad;
    }

    #
    # Add vnode counts.
    #
    if ($role eq $Node::NODEROLE_TESTNODE && $virtnode_capacity) {
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	my $vtype;
	
	if (exists($argref->{'vtype'})) {
	    $vtype = $argref->{'vtype'};
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	}
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	else  {
	    $vtype = $type;
	    if (!($vtype =~ s/pc/pcvm/)) {
		$vtype = "$vtype-vm";
	    }
	}
	
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	DBQueryWarn("insert into node_auxtypes set node_id='$node_id', " .
		    "type='$vtype', count=$virtnode_capacity")
	    or goto bad;
    }
    return Node->Lookup($node_id);
    
  bad:
    foreach my $table (@cleantables) {
	DBQueryWarn("delete from $table where node_id='$node_id'");
    }
    return undef;
}

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#
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# Refresh a class instance by reloading from the DB.
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#
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sub Refresh($)
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{
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    my ($self) = @_;

    return -1
	if (! ref($self));
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    my $nodeid = $self->node_id();
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    my $query_result =
	DBQueryWarn("select * from nodes as n ".
		    "where n.node_id='$nodeid'");

    return -1
	if (!$query_result || !$query_result->numrows);

    $self->{"DBROW"}  = $query_result->fetchrow_hashref();
    # Force reload
    $self->{"RSRV"}     = undef;
    $self->{"TYPEINFO"} = undef;
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    $self->{"ATTRS"}    = undef;
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    return 0;
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}

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#
# Flush from our little cache, as for the expire daemon.
#
sub Flush($)
{
    my ($self) = @_;

    delete($nodes{$self->node_id()});
}
sub FlushAll($)
{
    my ($class) = @_;
    
    %nodes = ();
}

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#
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# Stringify for output.
#
sub Stringify($)
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{
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    my ($self) = @_;
    
    my $nodeid = $self->node_id();
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    return "[Node: $nodeid]";
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}

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#
# Check permissions. Allow for either uid or a user ref until all code
# updated.
#
sub AccessCheck($$$)
{
    my ($self, $user, $access_type) = @_;

    # Must be a real reference. 
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    return 0
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	if (! ref($self));

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    if ($access_type < TB_NODEACCESS_MIN ||
	$access_type > TB_NODEACCESS_MAX) {
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	print STDERR "*** Invalid access type: $access_type!\n";
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	return 0;
    }
    # Admins do whatever they want.
    return 1
	if ($user->IsAdmin());

    my $mintrust;

    if ($access_type == TB_NODEACCESS_READINFO) {
	$mintrust = PROJMEMBERTRUST_USER;
    }
    else {
	$mintrust = PROJMEMBERTRUST_LOCALROOT;
    }

    # Get the reservation for this node. Only admins can mess with free nodes.
    my $experiment = $self->Reservation();
    return 0
	if (!defined($experiment));
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    my $group = $experiment->GetGroup();
    return 0
	if (!defined($group));
    my $project = $experiment->GetProject();
    return 0
	if (!defined($project));

    #
    # Either proper permission in the group, or group_root in the
    # project. This lets group_roots muck with other people's
    # nodes, including those in groups they do not belong to.
    #
    return TBMinTrust($group->Trust($user), $mintrust) ||
	TBMinTrust($project->Trust($user), PROJMEMBERTRUST_GROUPROOT);
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}

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#
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# Lazily load the reservation info.
#
sub IsReserved($)
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{
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    my ($self) = @_;
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    return 0
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	if (! ref($self));
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    if (! defined($self->{"RSRV"})) {
	my $nodeid = $self->node_id();
	
	my $query_result =
	    DBQueryWarn("select * from reserved " .
			"where node_id='$nodeid'");
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	return 0
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	    if (!$query_result);
	return 0
	    if (!$query_result->numrows);

	$self->{"RSRV"} = $query_result->fetchrow_hashref();
	return 1;
    }
    return 1;
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}

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#
# Is node up.
#
sub IsUp($)
{
    my ($self) = @_;

    return 0
	if (! ref($self));

    return $self->eventstate() eq TBDB_NODESTATE_ISUP;
}

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#
# Determine if a node can be allocated to a project.
#
sub NodeAllocCheck($$)
{
    my ($self, $pid) = @_;

    # Must be a real reference. 
    return 0
	if (! ref($self));

    my $node_id = $self->node_id();

    #
    # Hmm. The point of this join is to find rows in the permissions table
    # with the corresponding type of the node. If no rows come back, its
    # a non-existent node! If the values are NULL, then there are no rows
    # with that type/class, and thus the type/class is free to be allocated
    # by anyone. Otherwise we get the list of projects that are allowed,
    # and so we have to look at those.
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    # Note: nodetypeXpid_permissions has the pid_idx in addition to the pid -
    # presumably, the Right Thing would be to use that, but this function
    # is only passed the pid right now.
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    #
    my $query_result =
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	DBQueryFatal("select distinct p.type, p.pid_idx from nodes as n ".
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		     "left join node_types as nt on n.type=nt.type ".
		     "left join nodetypeXpid_permissions as p on ".
		     "     (p.type=nt.type or p.type=nt.class) ".
		     "where node_id='$node_id'");

    if (!$query_result->numrows) {
	print STDERR "NodeAllocCheck: No such node $node_id!\n";
	return 0;
    }
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    my ($ptype,$pid_idx) = $query_result->fetchrow_array();
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    # No rows, or a pid match.
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    if (!defined($ptype) || $pid_idx eq $pid->pid_idx()) {
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	return 1;
    }

    # Okay, must be rows in the permissions table. Check each pid for a match.
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    while (my ($ptype,$pid_idx) = $query_result->fetchrow_array()) {
	if ($pid_idx eq $pid->pid_idx()) {
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	    return 1;
	}
    }
    return 0;
}

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# Naming confusion.
sub AllocCheck($$)
{
    my ($self, $pid) = @_;

    return $self->NodeAllocCheck($pid);
}

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#
# Set alloc state for a node.
#
sub SetAllocState($$)
{
    my ($self, $state) = @_;

    return -1
	if (! (ref($self)));
    
    my $now = time();
    my $node_id = $self->node_id();
    
    DBQueryWarn("update nodes set allocstate='$state', " .
		"    allocstate_timestamp=$now where node_id='$node_id'")
	or return -1;

    return Refresh($self);
}

#
# Get alloc state for a node.
#
sub GetAllocState($$)
{
    my ($self, $pref) = @_;

    return -1
	if (! (ref($self) && ref($pref)));
    
    my $allocstate = $self->allocstate();
    
    if (defined($allocstate)) {
	$$pref = $allocstate;
    }
    else {
	$$pref = TBDB_ALLOCSTATE_UNKNOWN;
    }
    return 0;
}

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#
# Equality test for two experiments.
# Not strictly necessary in perl, but good form.
#
sub SameExperiment($$)
{
    my ($self, $other) = @_;

    # Must be a real reference. 
    return -1
	if (! (ref($self) && ref($other)));

    return $self->idx() == $other->idx();
}

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#
# Get the experiment this node is reserved too, or null.
#
sub Reservation($)
{
    my ($self) = @_;

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

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    return undef
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	if (! $self->IsReserved());

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    return Experiment->Lookup($self->{"RSRV"}->{'exptidx'});
}

#
# Return just the ID of the reservation experiment. Avoids locking problems
# within nalloc and nfree. 
#
sub ReservationID($)
{
    my ($self) = @_;

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

    return undef
	if (! $self->IsReserved());

    return $self->{"RSRV"}->{'exptidx'};
}

#
# Get the NEXT experiment this node is reserved too, or null.
#
sub NextReservation($)
{
    my ($self) = @_;

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

    my $node_id = $self->node_id();
    
    my $query_result =
	DBQueryFatal("select pid,eid from next_reserve ".
		     "where node_id='$node_id'");

    return undef
	if (!$query_result || !$query_result->numrows);

    my ($pid,$eid) = $query_result->fetchrow_array();

    return Experiment->Lookup($pid, $eid);
}

#
# Move a node from its experiment to another. Must treat oldreserved special.
#
sub MoveReservation($$)
{
    my ($self, $newexperiment) = @_;
    
    return -1
	if (! (ref($self) && ref($newexperiment)));

    return -1
	if (! $self->IsReserved());
    
    my $node_id    = $self->node_id();
    my $newpid     = $newexperiment->pid();
    my $neweid     = $newexperiment->eid();
    my $newidx     = $newexperiment->idx();
    my $oldpid     = "";
    my $oldeid     = "";
    my $oldidx     = 0;
    
    # Must remember old reservation when moving to new oldreserved.
    if ($newpid eq OLDRESERVED_PID() && $neweid eq OLDRESERVED_EID()) {
        #
	# Cannot do an experiment Lookup cause reserved table may be locked.
	# IsReserved() will load the reserved table entry only.
	#
	return -1
	    if (!$self->IsReserved());
	
	$oldpid     = $self->{"RSRV"}->{'pid'};
	$oldeid     = $self->{"RSRV"}->{'eid'};
	$oldidx     = $self->{"RSRV"}->{'exptidx'};
    }
    
    DBQueryWarn("update reserved set " .
		" vname='$node_id', ".
		" exptidx=$newidx, ".
		" pid='$newpid', ".
		" eid='$neweid', ".
		" old_exptidx=$oldidx, ".
		" old_pid='$oldpid', ".
		" old_eid='$oldeid' ".
		"where node_id='$node_id'")
	or return -1;
    return 0;
}

#
# Change reservation table for a node.
#
sub ModifyReservation($$)
{
    my ($self, $argref) = @_;
    
    return -1
	if (! (ref($self) && ref($argref)));

    return -1
	if (! $self->IsReserved());
    
    my $node_id = $self->node_id();
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    my @sets    = ();
    foreach my $key (keys(%{$argref})) {
	my $val = $argref->{$key};
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	push(@sets, "$key=" . ("$val" eq "NULL" ? "NULL" : "'$val'"));
    }
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    my $query = "update reserved set ".	join(",", @sets);
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    $query .= " where node_id='$node_id'";

    return -1
	if (! DBQueryWarn($query));

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    return Refresh($self);
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}

#
# Map nodeid to its pid/eid in the oldreserved holding reservation
#
sub OldReservation($)
{
    my ($self) = @_;

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

    my $nodeid          = $self->node_id();
    my $oldreserved_pid = OLDRESERVED_PID;
    my $oldreserved_eid = OLDRESERVED_EID;
    
    my $query_result =
	DBQueryWarn("select old_pid,old_eid from reserved ".
		    "where node_id='$nodeid' and pid='$oldreserved_pid' ".
		    "and eid='$oldreserved_eid'");

    return undef
	if (! $query_result || !$query_result->num_rows);

    my ($pid,$eid) = $query_result->fetchrow_array();
    
    return Experiment->Lookup($pid, $eid);
}

sub OldReservationID($)
{
    my ($self) = @_;

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

    my $nodeid          = $self->node_id();
    my $oldreserved_pid = OLDRESERVED_PID;
    my $oldreserved_eid = OLDRESERVED_EID;
    
    my $query_result =
	DBQueryWarn("select old_exptidx from reserved ".
		    "where node_id='$nodeid' and pid='$oldreserved_pid' ".
		    "and eid='$oldreserved_eid'");

    return undef
	if (! $query_result || !$query_result->num_rows);

    my ($idx) = $query_result->fetchrow_array();
    
    return $idx;
}

#
# Return the tip server (and tipname) for a node.
#
sub TipServer($$;$)
{
    my ($self, $pserver, $ptipname) = @_;

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

    $$pserver  = undef;
    $$ptipname = undef
	if (defined($ptipname));

    my $nodeid = $self->node_id();
	
    my $query_result =
	DBQueryWarn("select server,tipname from tiplines " .
		    "where node_id='$nodeid'");
    return -1
	if (!$query_result);
    
    return 0
	if (!$query_result->numrows);

    my ($server, $tipname) = $query_result->fetchrow_array();
    $$pserver  = $server;
    $$ptipname = $tipname
	if (defined($ptipname));

    return 0;
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}

#
# Get the raw reserved table info and return it, or null if no reservation
#
sub ReservedTableEntry($)
{
    my ($self) = @_;

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

    return undef
	if (! $self->IsReserved());

    return $self->{"RSRV"};
}

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#
# Return a list of virtual nodes on the given physical node.
#
sub VirtualNodes($$)
{
    my ($self, $plist) = @_;

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

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    @$plist         = ();

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    my $reservation = $self->Reservation();
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    return 0
	if (!defined($reservation));

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    my $node_id     = $self->node_id();
    my $exptidx     = $reservation->idx();
    my @result      = ();

    my $query_result = 
	DBQueryWarn("select r.node_id from reserved as r ".
		    "left join nodes as n ".
		    "on r.node_id=n.node_id ".
		    "where n.phys_nodeid='$node_id' and ".
		    "      n.node_id!=n.phys_nodeid and exptidx='$exptidx'");

    return -1
	if (!$query_result);
    return 0
	if (!$query_result->numrows);

    while (my ($node_id) = $query_result->fetchrow_array()) {
	my $node = Node->Lookup($node_id);
	if (!defined($node)) {
	    print STDERR "*** VirtualNodes: no such virtual node $node_id!\n";
	    return -1;
	}
	push(@result, $node);
    }
    @$plist = @result;
    return 0;
}

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# Need to create a set of access methods for the reservation.
sub vname($)
{
    my ($self) = @_;

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

    return undef
	if (! $self->IsReserved());

    return $self->{"RSRV"}->{'vname'};
}

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#
# Lookup a specific attribute in the node_attributes table, 
#
sub NodeAttribute($$$;$)
{
    my ($self, $attrkey, $pattrvalue, $pattrtype) = @_;
    
    return -1
	if (!ref($self));

    my $node_id = $self->node_id();

    if (!defined($self->{"ATTRS"})) {
	my $query_result =
	    DBQueryWarn("select * from node_attributes ".
			"where node_id='$node_id'");

	return -1
	    if (!defined($query_result));

       	$self->{"ATTRS"} = {};
	while (my $row = $query_result->fetchrow_hashref()) {
	    my $key = $row->{'attrkey'};

	    $self->{"ATTRS"}->{$key} = $row;
	}
    }
    
    if (!exists($self->{"ATTRS"}->{$attrkey})) {
	$$pattrvalue = undef;
	return 0;
    }
    my $ref = $self->{"ATTRS"}->{$attrkey};

    $$pattrvalue = $ref->{'attrvalue'};
    $$pattrtype  = $ref->{'attrtype'}
        if (defined($pattrtype));

    return 0;
}

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#
# Return type info. We cache this in the instance since node_type stuff
# does not change much.
#
sub NodeTypeInfo($)
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{
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    my ($self) = @_;
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    return undef
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	if (! ref($self));
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    return $self->{"TYPEINFO"}
        if (defined($self->{"TYPEINFO"}));

    my $type = $self->type();
    my $nodetype = NodeType->Lookup($type);
    
    $self->{"TYPEINFO"} = $nodetype
	if (defined($nodetype));
    
    return $nodetype;
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}

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#
# Lookup a specific attribute in the nodetype info. 
#
sub NodeTypeAttribute($$$;$)
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{
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    my ($self, $attrkey, $pattrvalue, $pattrtype) = @_;
    
    return -1
	if (!ref($self));
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    my $typeinfo = $self->NodeTypeInfo();
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    return -1
	if (!defined($typeinfo));
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    return $typeinfo->GetAttribute($attrkey, $pattrvalue, $pattrtype);
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}

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#
# Shortcuts to "common" type information.
# Later these might be overriden by node attributes.
#
sub class($)          { return NodeTypeInfo($_[0])->class(); }
sub isvirtnode($)     { return NodeTypeInfo($_[0])->isvirtnode(); }
sub isjailed($)       { return NodeTypeInfo($_[0])->isjailed(); }
sub isdynamic($)      { return NodeTypeInfo($_[0])->isdynamic(); }
sub isremotenode($)   { return NodeTypeInfo($_[0])->isremotenode(); }
sub issubnode($)      { return NodeTypeInfo($_[0])->issubnode(); }
sub isplabdslice($)   { return NodeTypeInfo($_[0])->isplabdslice(); }
sub isplabphysnode($) { return NodeTypeInfo($_[0])->isplabphysnode(); }
sub issimnode($)      { return NodeTypeInfo($_[0])->issimnode(); }
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sub isgeninode($)     { return NodeTypeInfo($_[0])->isgeninode(); }
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sub isfednode($)      { return NodeTypeInfo($_[0])->isfednode(); }
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#
# And these are the less common attributes, but still common enough to
# warrant shortcuts.
#
sub default_osid($;$) {
    return NodeTypeInfo($_[0])->default_osid($_[1]);
}
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sub default_imageid($;$) {
    return NodeTypeInfo($_[0])->default_imageid($_[1]);
}
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sub imageable($;$) {
    return NodeTypeInfo($_[0])->imageable($_[1]);
}
sub disksize($;$) {
    return NodeTypeInfo($_[0])->disksize($_[1]);
}
sub disktype($;$) {
    return NodeTypeInfo($_[0])->disktype($_[1]);
}
sub bootdisk_unit($;$) {
    return NodeTypeInfo($_[0])->bootdisk_unit($_[1]);
}
sub control_iface($;$) {
    return NodeTypeInfo($_[0])->control_iface($_[1]);
}
sub rebootable($;$) {
    return NodeTypeInfo($_[0])->rebootable($_[1]);
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}

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#
# Perform some updates ...
#
sub Update($$)
{
    my ($self, $argref) = @_;

    # Must be a real reference. 
    return -1
	if (! ref($self));

    my $nodeid = $self->node_id();
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    my @sets   = ();
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    foreach my $key (keys(%{$argref})) {
	my $val = $argref->{$key};

	# Treat NULL special.
	push (@sets, "${key}=" . ($val eq "NULL" ? "NULL" : "'$val'"));
    }
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    my $query = "update nodes set " . join(",", @sets) .
	" where node_id='$nodeid'";
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    return -1
	if (! DBQueryWarn($query));

    return Refresh($self);
}

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#
# Insert a Log entry for a node.
#
sub InsertNodeLogEntry($$$$)
{
    my ($self, $user, $type, $message) = @_;

    # Must be a real reference. 
    return -1
	if (! ref($self));

    return -1
	if (! grep {$_ eq $type} TB_NODELOGTYPES());

    # XXX Eventually this should change, but it uses non-existent uids!
    my $dbid    = (defined($user) ? $user->uid_idx() : 0);
    my $dbuid   = (defined($user) ? $user->uid()     : "root");
    my $node_id = $self->node_id();
    $message    = DBQuoteSpecial($message);

    return -1
	if (! DBQueryWarn("insert into nodelog values ".
			  "('$node_id', NULL, '$type', '$dbuid', '$dbid', ".
			  " $message, now())"));
    return 0;
}

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#
# Clear the experimental interfaces for a node.
#
#
# Insert a Log entry for a node.
#
sub ClearInterfaces($)
{
    my ($self) = @_;

    # Must be a real reference. 
    return -1
	if (! ref($self));

    my $node_id = $self->node_id();

    DBQueryWarn("update interfaces set IP='',IPaliases=NULL,mask=NULL,".
		"       rtabid='0',vnode_id=NULL,current_speed='0' ".
		"where node_id='$node_id' and ".
		"  role='" . TBDB_IFACEROLE_EXPERIMENT() . "'")
	or return -1;

    return 0;
}

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#
# Look up all interfaces for a node, return list of objects.
#
sub AllInterfaces($$)
{
    my ($self, $pref) = @_;

    # Must be a real reference. 
    return -1
	if (! (ref($self) && ref($pref)));

    return Interface->LookupAll($self->node_id(), $pref);
}

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#
# Mark a node for an update.
#
sub MarkForUpdate($)
{
    my ($self) = @_;

    # Must be a real reference. 
    return -1
	if (! ref($self));

    my $node_id = $self->node_id();

    return -1
	if (! DBQueryWarn("update nodes set ".
			  "update_accounts=GREATEST(update_accounts,1) ".
			  "where node_id='$node_id'"));

    return Refresh($self);
}
# Class method!
sub CheckUpdateStatus($$$@)
{
    my ($class, $pdone, $pnotdone, @nodelist) = @_;
    my @done = ();
    my @notdone = ();

    my $where = join(" or ",
		     map("node_id='" . $_->node_id() . "'", @nodelist));

    my $query_result =
	DBQueryWarn("select node_id,update_accounts from nodes ".
		    "where ($where)");

    return -1
	if (! $query_result);

    while (my ($node_id,$update_accounts) = $query_result->fetchrow_array) {
	my $node = Node->Lookup($node_id);
	if (! $update_accounts) {
	    Refresh($node);
	    push(@done, $node);
	}
	else {
	    push(@notdone, $node);
	}
    }
    
    @$pdone = @done;
    @$pnotdone = @notdone;
    return 0;
}

#
# Clear the bootlog.
#
sub ClearBootLog($)
{
    my ($self) = @_;

    # Must be a real reference. 
    return -1
	if (! ref($self));

    my $node_id = $self->node_id();

    return -1
	if (! DBQueryWarn("delete from node_bootlogs ".
			  "where node_id='$node_id'"));
    return 0;
}

#
# Get the bootlog.
#
sub GetBootLog($$)
{
    my ($self, $pref) = @_;

    # Must be a real reference. 
    return -1
	if (! ref($self));

    $$pref = undef;

    my $node_id = $self->node_id();

    my $query_result =
	DBQueryWarn("select bootlog from node_bootlogs ".
		    "where node_id='$node_id'");
    return -1
	if (! $query_result);
    return 0
	if (! $query_result->numrows);

    my ($bootlog) = $query_result->fetchrow_array();
    $$pref = $bootlog;
    return 0;
}

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#
# Set event state for a node.
#
sub SetEventState($$)
{
    my ($self, $state) = @_;

    # Must be a real reference. 
    return -1
	if (! ref($self));

    my $node_id = $self->node_id();

    #
    # If using the event system, we send out an event for the state daemon to
    # pick up. Otherwise, we just set the state in the database ourselves
    #
    if ($EVENTSYS) {
	return EventSendFatal(objtype   => TBDB_TBEVENT_NODESTATE,
			      objname   => $node_id,
			      eventtype => $state,
			      host      => $BOSSNODE);
    }
    return $self->Update({"eventstate"      => $state,
			  "state_timestamp" => time()});
}

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#
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# Create new vnodes. The argument is a reference; to a a hash of options to
# be used when creating the new node(s). A list of the node names is
# returned.
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#
sub CreateVnodes($$)
{
    my ($rptr, $options) = @_;
    my @created   = ();
    my @tocreate  = ();

    if (!defined($options->{'pid'})) {
	print STDERR "*** CreateVnodes: Must supply a pid!\n";
	return -1;
    }
    if (!defined($options->{'eid'})) {
	print STDERR "*** CreateVnodes: Must supply a eid!\n";
	return -1;
    }
    if (!defined($options->{'count'})) {
	print STDERR "*** CreateVnodes: Must supply a count!\n";
	return -1;
    }
    if (!defined($options->{'vtype'})) {
	print STDERR "*** CreateVnodes: Must supply a vtype!\n";
	return -1;
    }
    if (!defined($options->{'nodeid'})) {
	print STDERR "*** CreateVnodes: Must supply a pnode!\n";
	return -1;
    }
    
    my $debug   = defined($options->{'debug'}) && $options->{'debug'};
    my $impotent= defined($options->{'impotent'}) && $options->{'impotent'};
    my $verbose = defined($options->{'verbose'}) && $options->{'verbose'};
    my $pid     = $options->{'pid'};
    my $eid     = $options->{'eid'};
    my $count   = $options->{'count'};
    my $vtype   = $options->{'vtype'};
    my $pnode   = $options->{'nodeid'};

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    my $node = Node->Lookup($pnode);
    if (!defined($node)) {
	print STDERR "*** CreateVnodes: No such node $pnode!\n";
	return -1;
    }

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    my $experiment = Experiment->Lookup($pid, $eid);
    if (!defined($experiment)) {
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	print STDERR "*** CreateVnodes: No such experiment $pid/$eid!\n";
	return -1;
    }
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    my $exptidx = $experiment->idx();
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    #
    # Need the vtype node_type info. 
    #
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    my $nodetype = NodeType->Lookup($vtype);
    if (! defined($nodetype)) {
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	print STDERR "*** CreateVnodes: No such node type '$vtype'\n";
	return -1;
    }
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    if (!$nodetype->isdynamic()) {
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	print STDERR "*** CreateVnodes: Not a dynamic node type: '$vtype'\n";
	return -1;
    }
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    my $isremote = $nodetype->isremotenode();
    my $isjailed = $nodetype->isjailed();
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    #
    # Make up a priority (just used for sorting). We need the name prefix
    # as well for consing up the node name.
    #
    my $nodeprefix;
    my $nodenum;
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    my $ipbase;
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    if ($pnode =~ /^(.*\D)(\d+)$/) {
	$nodeprefix = $1;
	$nodenum    = $2;
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	$ipbase     = $nodenum;
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    }
    else {
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	$nodeprefix = $pnode;
	$nodenum    = "";

	#
	# Determine ipbase from the control IP. 
	#
	my $interface = Interface->LookupControl($node);
	if (!defined($interface)) {
	    print STDERR "*** CreateVnodes: No control interface for $node\n";
	    return -1;
	}
	my $ctrlip = $interface->IP();
	if (!defined($ctrlip) || $ctrlip eq "") {
	    print STDERR "*** CreateVnodes: No control IP for $interface\n";
	    return -1;
	}
	my $tmp = ~inet_aton($CONTROL_NETMASK) & inet_aton($ctrlip);
	$ipbase = unpack("N", $tmp);
	if ($ipbase == 0 || $ipbase < 0 || $ipbase > 0x3fff) {
	    print STDERR
		"*** CreateVnodes: Bad ipbase '$ipbase' for $interface\n";
	    return -1;
	}
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    }

    #
    # Need the opmode, which comes from the OSID, which is in the node_types
    # table. 
    #
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    my $osid = $nodetype->default_osid();
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    my $query_result =
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	DBQueryWarn("select op_mode from os_info where osid='$osid'");
    return -1
	if (! $query_result);
    
    if (! $query_result->numrows) {
	print STDERR "*** CreateVnodes: No such OSID '$osid'\n";
	return -1;
    }
    my ($opmode) = $query_result->fetchrow_array();

    #
    # Need IP for jailed nodes.
    # 
    my $IPBASE = TBDB_JAILIPBASE();
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    my $IPBASE1;
    my $IPBASE2;
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    if ($IPBASE =~ /^(\d+).(\d+).(\d+).(\d+)/) {
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	$IPBASE1 = $1;
	$IPBASE2 = $2;
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    }
    else {
	print STDERR "*** CreateVnodes: Bad IPBASE '$IPBASE'\n";
	return -1;
    }

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    my $uuid = NewUUID();
    if (!defined($uuid)) {
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	print STDERR "Could not generate a UUID!\n";
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	next NODE;
    }
    
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    #
    # Assign however many we are told to (typically by assign). Locally
    # this is not a problem since nodes are not shared; assign always
    # does the right thing and we do what it says. In the remote case,
    # nodes are shared and so it is harder to make sure that nodes are not
    # over committed. I am not going to worry about this right now though
    # cause it would be too hard. For RON nodes this is fine; we just
    # tell people to log in and use them. For plab nodes, this is more
    # of a problem, but I am going to ignore that for now too since we do
    # not ever allocate enough to worry; must revisit this at some point.
    # 
    # Look to see what nodes are already allocated on the node, and skip
    # those. Must do this with tables locked, of course.
    #
    DBQueryFatal("lock tables nodes write, reserved write, ".
		 "node_status write, node_hostkeys write");

    if (0 && !$isremote) {
	for (my $i = 1; $i <= $count; $i++) {
	    push(@tocreate, $i);
	}
    }
    else {
	my $n = 1;
	my $i = 0;

	while ($i < $count) {
	    my $vnodeid = $nodeprefix . "vm" . $nodenum . "-" . $n;
	    
	    $query_result =
		DBQueryWarn("select node_id from nodes ".
			     "where node_id='$vnodeid'");
	    goto bad
		if (!$query_result);

	    if (!$query_result->numrows) {
		push(@tocreate, $n);
		$i++;
	    }
	    $n++;
	}
    }

    # See below.
    my $eventstate = TBDB_NODESTATE_SHUTDOWN();
    my $allocstate = TBDB_ALLOCSTATE_FREE_CLEAN();

    #
    # Create a bunch.
    #
    foreach my $i (@tocreate) {
1458
	my $vpriority = 10000000 + ($ipbase * 1000) + $i;
1459 1460
	my $vnodeid   = $nodeprefix . "vm" . $nodenum . "-" . $i;

1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472
	#
	# Construct the vnode IP.  The general form is:
	#	<IPBASE1>.<IPBASE2>.<pnode>.<vnode>
	# but if <pnode> is greater than 254 we have to increment
	# IPBASE2.
	#
	# XXX at Utah our second big cluster of nodes starts at
	# nodenum=201 and I would like our vnode IPs to align
	# at that boundary, so 254 becomes 200.
	#
	my $nodenumlimit = $ISUTAH ? 200 : 254;
	my $pnet = $IPBASE2;
1473
	my $pnode2 = int($ipbase);
1474 1475 1476 1477 1478 1479
	while ($pnode2 > $nodenumlimit) {
	    $pnet++;
	    $pnode2 -= $nodenumlimit;
	}
	my $jailip = "${IPBASE1}.${pnet}.${pnode2}.${i}";

1480
	if ($verbose) {
1481
	    print STDERR "Jail IP for $vnodeid is $jailip\n";
1482
	    if ($impotent) {
1483 1484
		print STDERR
		    "Would allocate $vnodeid on $pnode ($vtype, $osid)\n";
1485 1486
	    }
	    else {
1487 1488
		print STDERR
		    "Allocating $vnodeid on $pnode ($vtype, $osid)\n";
1489 1490 1491 1492 1493 1494
	    }
	}

	my $statement =
	         "insert into nodes set ".
		 "       node_id='$vnodeid', " .
1495
		 "       uuid='$uuid', " .
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		 "       type='$vtype', ".
		 "       phys_nodeid='$pnode', ".
		 "       role='virtnode', " .
		 "       priority='$vpriority', ".
		 "       op_mode='$opmode', " .
		 "       eventstate='$eventstate', " .
		 "       allocstate='$allocstate', ".
		 "       def_boot_osid='$osid', " .
		 "       update_accounts=1, ".
		 "       jailflag=$isjailed ".
1506
		 (($isjailed && !$isremote) ? ",jailip='$jailip'" : "");
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	print STDERR "$statement\n"
	    if ($debug);

	if (!$impotent && !DBQueryWarn($statement)) {
	    print STDERR "*** CreateVnodes: Could not create nodes entry\n";
	    goto bad;
	}

	#
	# Also reserve the node!
	# 
	$statement =
	         "insert into reserved set ".
		 "       node_id='$vnodeid', " .
1522
		 "       exptidx=$exptidx, ".
1523 1524
		 "       pid='$pid', ".
		 "       eid='$eid', ".
1525
		 "       vname='$vnodeid', ".
1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570
		 "       old_pid='', ".
		 "       old_eid=''";

	print STDERR "$statement\n"
	    if ($debug);

	if (!$impotent && !DBQueryWarn($statement)) {
	    print STDERR "*** CreateVnodes: Could not create reserved entry\n";
	    goto bad;
	}

	$statement =
	         "insert into node_status set ".
		 "       node_id='$vnodeid', " .
		 "       status='up', ".
		 "       status_timestamp=now()";

	print STDERR "$statement\n"
	    if ($debug);

	if (!$impotent && !DBQueryWarn($statement)) {
	    print STDERR "*** CreateVnodes: Could not create status entry\n";
	    goto bad;
	}

	$statement =
	         "insert into node_hostkeys set ".
		 "       node_id='$vnodeid'";

	print STDERR "$statement\n"
	    if ($debug);

	if (!$impotent && !DBQueryWarn($statement)) {
	    print STDERR "*** CreateVnodes: Could not create hostkeys entry\n";
	    goto bad;
	}
	
	push(@created, $vnodeid);
    }
    DBQueryFatal("unlock tables");
    @$rptr = @created;
    return 0;

  bad:
    if (!$impotent) {
1571
	foreach my $vnodeid (@created) {
1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604
	    DBQueryWarn("delete from reserved where node_id='$vnodeid'");
	    DBQueryWarn("delete from nodes where node_id='$vnodeid'");
	    DBQueryWarn("delete from node_hostkeys where node_id='$vnodeid'");
	    DBQueryWarn("delete from node_status where node_id='$vnodeid'");
	}
    }
    DBQueryFatal("unlock tables");
    return -1;
}

#
# Delete vnodes created in above step.
# 
sub DeleteVnodes(@)
{
    my (@vnodes) = @_;

    DBQueryWarn("lock tables nodes write, reserved write");
    foreach my $vnodeid (@vnodes) {
	DBQueryWarn("delete from reserved where node_id='$vnodeid'");
	DBQueryWarn("delete from nodes where node_id='$vnodeid'");
    }
    DBQueryFatal("unlock tables");
    
    foreach my $vnodeid (@vnodes) {
	DBQueryWarn("delete from node_hostkeys where node_id='$vnodeid'");
	DBQueryWarn("delete from node_status where node_id='$vnodeid'");
	DBQueryWarn("delete from node_rusage where node_id='$vnodeid'");
    }

    return 0;
}

1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665
sub SetNodeHistory($$$$)
{
    my ($self, $op, $user, $experiment) = @_;

    my $exptidx = $experiment->idx();
    my $nodeid  = $self->node_id();
    my $now     = time();
    my $uid;
    my $uid_idx;

    if (!defined($user)) {
	# Should this be elabman instead?
	$uid = "root";
	$uid_idx = 0;
    }
    else {
	$uid = $user->uid();
	$uid_idx = $user->uid_idx();
    }
    if ($op eq TB_NODEHISTORY_OP_MOVE() || $op eq TB_NODEHISTORY_OP_FREE()) {
	# Summary info. We need the last entry made.
	my $query_result =
	    DBQueryWarn("select exptidx,stamp from node_history ".
			"where node_id='$nodeid' ".
			"order by stamp desc limit 1");