e8f67622e6
git-svn-id: https://svn.code.sf.net/p/xcat/code/xcat-core/trunk@2238 8638fb3e-16cb-4fca-ae20-7b5d299a9bcd
389 lines
11 KiB
Perl
389 lines
11 KiB
Perl
# IBM(c) 2007 EPL license http://www.eclipse.org/legal/epl-v10.html
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package xCAT::NodeRange;
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require xCAT::Table;
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require Exporter;
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use strict;
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#Perl implementation of noderange
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our @ISA = qw(Exporter);
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our @EXPORT = qw(noderange nodesmissed);
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our @EXPORT_OK = qw(extnoderange);
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my $missingnodes=[];
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my $nodelist; #=xCAT::Table->new('nodelist',-create =>1);
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#my $nodeprefix = "node";
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my @allnodeset;
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my $retaincache=0;
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my $recurselevel=0;
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sub subnodes (\@@) {
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#Subtract set of nodes from the first list
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my $nodes = shift;
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my $node;
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foreach $node (@_) {
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@$nodes = (grep(!/^$node$/,@$nodes));
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}
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}
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sub nodesmissed {
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return @$missingnodes;
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}
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sub expandatom {
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my $atom = shift;
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my $verify = (scalar(@_) == 1 ? shift : 1);
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my @nodes= ();
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#TODO: these env vars need to get passed by the client to xcatd
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my $nprefix=(defined ($ENV{'XCAT_NODE_PREFIX'}) ? $ENV{'XCAT_NODE_PREFIX'} : 'node');
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my $nsuffix=(defined ($ENV{'XCAT_NODE_SUFFIX'}) ? $ENV{'XCAT_NODE_SUFFIX'} : '');
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if ($nodelist->getAttribs({node=>$atom},'node')) { #The atom is a plain old nodename
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return ($atom);
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}
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if ($atom =~ /^\(.*\)$/) { # handle parentheses by recursively calling noderange()
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$atom =~ s/^\((.*)\)$/$1/;
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$recurselevel++;
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return noderange($atom);
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}
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if ($atom =~ /@/) {
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$recurselevel++;
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return noderange($atom);
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}
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# Try to match groups?
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foreach($nodelist->getAllAttribs('node','groups')) {
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my @groups=split(/,/,$_->{groups}); #The where clause doesn't guarantee the atom is a full group name, only that it could be
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if (grep { $_ eq "$atom" } @groups ) {
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push @nodes,$_->{node};
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}
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}
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if ($atom =~ m/^[0-9]+\z/) { # if only numbers, then add the prefix
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my $nodename=$nprefix.$atom.$nsuffix;
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return expandatom($nodename,$verify);
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}
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my $nodelen=@nodes;
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if ($nodelen > 0) {
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return @nodes;
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}
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if ($atom =~ m/^\//) { # A regular expression
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unless ($verify) { # If not in verify mode, regex makes zero possible sense
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return ($atom);
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}
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#TODO: check against all groups
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$atom = substr($atom,1);
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unless (scalar(@allnodeset)) {
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@allnodeset = $nodelist->getAllAttribs('node');
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}
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foreach (@allnodeset) { #$nodelist->getAllAttribs('node')) {
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if ($_->{node} =~ m/^${atom}$/) {
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push(@nodes,$_->{node});
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}
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}
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return(@nodes);
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}
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if ($atom =~ m/(.*)\[(.*)\](.*)/) { # square bracket range
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#for the time being, we are only going to consider one [] per atom
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#xcat 1.2 does no better
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my @subelems = split(/([\,\-\:])/,$2);
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my $subrange="";
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while (my $subelem = shift @subelems) {
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my $subop=shift @subelems;
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$subrange=$subrange."$1$subelem$3$subop";
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}
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foreach (split /,/,$subrange) {
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my @newnodes=expandatom($_,$verify);
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@nodes=(@nodes,@newnodes);
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}
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return @nodes;
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}
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if ($atom =~ m/\+/) { # process the + operator
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$atom =~ m/^([^0-9]*)([0-9]+)([^\+]*)\+([0-9]+)/;
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my $pref=$1;
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my $startnum=$2;
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my $suf=$3;
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my $end=$4+$startnum;
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my $endnum = sprintf("%d",$end);
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if (length ($startnum) > length ($endnum)) {
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$endnum = sprintf("%0".length($startnum)."d",$end);
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}
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if (($pref eq "") && ($suf eq "")) {
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$pref=$nprefix;
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$suf=$nsuffix;
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}
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foreach ("$startnum".."$endnum") {
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my @addnodes=expandatom($pref.$_.$suf,$verify);
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@nodes=(@nodes,@addnodes);
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}
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return (@nodes);
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}
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if ($atom =~ m/[-:]/) { # process the minus range operator
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my $left;
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my $right;
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if ($atom =~ m/:/) {
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($left,$right)=split /:/,$atom;
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} else {
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my $count= ($atom =~ tr/-//);
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if (($count % 2)==0) { #can't understand even numbers of - in range context
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if ($verify) {
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push @$missingnodes,$atom;
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return ();
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} else { #but we might not really be in range context, if noverify
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return ($atom);
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}
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}
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my $expr="([^-]+?".("-[^-]*"x($count/2)).")-(.*)";
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$atom =~ m/$expr/;
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$left=$1;
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$right=$2;
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}
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if ($left eq $right) { #if they said node1-node1 for some strange reason
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return expandatom($left,$verify);
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}
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my @leftarr=split(/(\d+)/,$left);
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my @rightarr=split(/(\d+)/,$right);
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if (scalar(@leftarr) != scalar(@rightarr)) { #Mismatch formatting..
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if ($verify) {
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push @$missingnodes,$atom;
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return (); #mismatched range, bail.
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} else { #Not in verify mode, just have to guess it's meant to be a nodename
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return ($atom);
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}
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}
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my $prefix = "";
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my $suffix = "";
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foreach (0..$#leftarr) {
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my $idx = $_;
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if ($leftarr[$idx] =~ /^\d+$/ and $rightarr[$idx] =~ /^\d+$/) { #pure numeric component
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if ($leftarr[$idx] ne $rightarr[$idx]) { #We have found the iterator (only supporting one for now)
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my $prefix = join('',@leftarr[0..($idx-1)]); #Make a prefix of the pre-validated parts
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my $luffix; #However, the remainder must still be validated to be the same
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my $ruffix;
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if ($idx eq $#leftarr) {
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$luffix="";
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$ruffix="";
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} else {
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$ruffix = join('',@rightarr[($idx+1)..$#rightarr]);
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$luffix = join('',@leftarr[($idx+1)..$#leftarr]);
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}
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if ($luffix ne $ruffix) { #the suffixes mismatched..
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if ($verify) {
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push @$missingnodes,$atom;
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return ();
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} else {
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return ($atom);
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}
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}
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foreach ($leftarr[$idx]..$rightarr[$idx]) {
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my @addnodes=expandatom($prefix.$_.$luffix,$verify);
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@nodes=(@nodes,@addnodes);
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}
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return (@nodes); #the return has been built, return, exiting loop and all
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}
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} elsif ($leftarr[$idx] ne $rightarr[$idx]) {
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if ($verify) {
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push @$missingnodes,$atom;
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return ();
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} else {
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return ($atom);
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}
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}
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$prefix .= $leftarr[$idx]; #If here, it means that the pieces were the same, but more to come
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}
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#I cannot conceive how the code could possibly be here, but whatever it is, it must be questionable
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if ($verify) {
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push @$missingnodes,$atom;
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return (); #mismatched range, bail.
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} else { #Not in verify mode, just have to guess it's meant to be a nodename
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return ($atom);
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}
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}
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push @$missingnodes,$atom;
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if ($verify) {
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return ();
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} else {
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return ($atom);
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}
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}
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sub retain_cache { #A semi private operation to be used *ONLY* in the interesting Table<->NodeRange module interactions.
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$retaincache=shift;
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}
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sub extnoderange { #An extended noderange function. Needed as the more straightforward function return format too simple for this.
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my $range = shift;
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my $namedopts = shift;
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my $verify=1;
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if ($namedopts->{skipnodeverify}) {
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$verify=0;
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}
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my $return;
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$retaincache=1;
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$return->{node}=[noderange($range,$verify)];
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if ($namedopts->{intersectinggroups}) {
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my %grouphash=();
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my $nlent;
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foreach (@{$return->{node}}) {
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$nlent=$nodelist->getNodeAttribs($_,['groups']);
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if ($nlent and $nlent->{groups}) {
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foreach (split /,/,$nlent->{groups}) {
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$grouphash{$_}=1;
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}
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}
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}
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$return->{intersectinggroups}=[sort keys %grouphash];
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}
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$retaincache=0;
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undef ($nodelist);
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@allnodeset=();
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return $return;
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}
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sub noderange {
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$missingnodes=[];
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#We for now just do left to right operations
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my $range=shift;
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my $verify = (scalar(@_) == 1 ? shift : 1);
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unless ($nodelist) {
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$nodelist =xCAT::Table->new('nodelist',-create =>1);
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$nodelist->{_use_cache} = 0; #TODO: a more proper external solution
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$nodelist->_build_cache(['node','groups']);
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$nodelist->{_use_cache} = 1; #TODO: a more proper external solution
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}
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my %nodes = ();
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my %delnodes = ();
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my $op = ",";
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my @elems = split(/(,(?![^[]*?])(?![^\(]*?\)))/,$range); # commas outside of [] or ()
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if (scalar(@elems)==1) {
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@elems = split(/(@(?![^\(]*?\)))/,$range); # only split on @ when no , are present (inner recursion)
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}
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while (my $atom = shift @elems) {
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if ($atom =~ /^-/) { # if this is an exclusion, strip off the minus, but remember it
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$atom = substr($atom,1);
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$op = $op."-";
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}
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if ($atom =~ /^\^(.*)$/) { # get a list of nodes from a file
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open(NRF,$1);
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while (<NRF>) {
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my $line=$_;
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unless ($line =~ m/^[\^#]/) {
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$line =~ m/^([^: ]*)/;
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my $newrange = $1;
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chomp($newrange);
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$recurselevel++;
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my @filenodes = noderange($newrange);
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foreach (@filenodes) {
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$nodes{$_}=1;
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}
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}
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}
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close(NRF);
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next;
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}
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my %newset = map { $_ =>1 } expandatom($atom,$verify); # expand the atom and make each entry in the resulting array a key in newset
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if ($op =~ /@/) { # compute the intersection of the current atom and the node list we have received before this
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foreach (keys %nodes) {
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unless ($newset{$_}) {
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delete $nodes{$_};
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}
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}
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} elsif ($op =~ /,-/) { # add the nodes from this atom to the exclude list
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foreach (keys %newset) {
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$delnodes{$_}=1; #delay removal to end
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}
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} else { # add the nodes from this atom to the total node list
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foreach (keys %newset) {
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$nodes{$_}=1;
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}
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}
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$op = shift @elems;
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} # end of main while loop
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# Now remove all the exclusion nodes
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foreach (keys %nodes) {
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if ($delnodes{$_}) {
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delete $nodes{$_};
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}
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}
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if ($recurselevel) {
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$recurselevel--;
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} else {
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unless ($retaincache) {
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undef $nodelist;
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@allnodeset=();
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}
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}
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return sort (keys %nodes);
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}
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1;
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=head1 NAME
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xCAT::NodeRange - Perl module for xCAT noderange expansion
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=head1 SYNOPSIS
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use xCAT::NodeRange;
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my @nodes=noderange("storage@rack1,node[1-200],^/tmp/nodelist,node300-node400,node401+10,500-550");
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=head1 DESCRIPTION
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noderange interprets xCAT noderange formatted strings and returns a list of xCAT nodelists. The following two operations are supported on elements, and interpreted left to right:
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, union next element with everything to the left.
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@ take intersection of element to the right with everything on the left (i.e. mask out anything to the left not belonging to what is described to the right)
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Each element can be a number of things:
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A node name, i.e.:
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=item * node1
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A hyphenated node range (only one group of numbers may differ between the left and right hand side, and those numbers will increment in a base 10 fashion):
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node1-node200 node1-compute-node200-compute
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node1:node200 node1-compute:node200-compute
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A noderange denoted by brackets:
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node[1-200] node[001-200]
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A regular expression describing the noderange:
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/d(1.?.?|200)
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A node plus offset (this increments the first number found in nodename):
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node1+199
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And most of the above substituting groupnames.
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3C
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3C
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NodeRange tries to be intelligent about detecting padding, so you can:
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node001-node200
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And it will increment according to the pattern.
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=head1 AUTHOR
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Jarrod Johnson (jbjohnso@us.ibm.com)
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=head1 COPYRIGHT
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Copyright 2007 IBM Corp. All rights reserved.
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=cut
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