1314be0e0e
displayed. "Invalid nodes in noderange". git-svn-id: https://svn.code.sf.net/p/xcat/code/xcat-core/trunk@136 8638fb3e-16cb-4fca-ae20-7b5d299a9bcd
406 lines
13 KiB
Perl
406 lines
13 KiB
Perl
#!/usr/bin/env perl
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# IBM(c) 2007 EPL license http://www.eclipse.org/legal/epl-v10.html
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package xCAT::Client;
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use xCAT::NodeRange;
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use xCAT::Utils;
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use xCAT::Table;
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use IO::Socket::SSL;
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if (xCAT::Utils->isLinux()) {
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eval { require Socket6 };
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eval { require IO::Socket::INET6 };
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eval { require IO::Socket::SSL::inet6 };
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} else {
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eval { require Socket };
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eval { require IO::Socket::INET };
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}
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use XML::Simple;
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use Data::Dumper;
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use Storable qw(dclone);
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my $xcathost='localhost:3001';
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my $plugins_dir;
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my %resps;
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1;
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#################################
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# submit_request will take an xCAT command and pass it to the xCAT
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# server for execution.
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#
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# If the XCATBYPASS env var is set, the connection to the server/daemon
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# will be bypassed and the plugin will be called directly. If it is
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# set to one or more directories (separated by ":"), all perl modules
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# in those directories will be loaded in as plugins (for duplicate
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# commands, last one in wins). If it is set to any other value
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# (e.g. "yes", "default", whatever string you want) the default plugin
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# directory /usr/lib/xcat/plugins will be used.
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#
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# Input:
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# Request hash - A hash ref containing the input command and args to be
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# passed to the plugin. The the xcatd daemon (or this routine when
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# XCATBYPASS) reads the {noderange} entry and builds a flattened array
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# of nodes that gets added as request->{node}
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# The format for the request hash is:
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# { command => [ 'xcatcmd' ],
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# noderange => [ 'noderange_string' ],
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# arg => [ 'arg1', 'arg2', '...', 'argn' ]
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# }
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# Callback - A subroutine ref that will be called to process the output
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# from the plugin.
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#
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# NOTE: The request hash will get converted to XML when passed to the
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# xcatd daemon, and will get converted back to a hash before being
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# passed to the plugin. The XMLin ForceArray option is used to
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# force all XML constructs to be arrays so that the plugin code
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# and callback routines can access the data consistently.
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# The input request and the response hash created by the plugin should
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# always create hashes with array values.
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#################################
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sub submit_request {
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my $request = shift;
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my $callback = shift;
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# If XCATBYPASS is set, invoke the plugin process_request method directly
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# without going through the socket connection to the xcatd daemon
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if ($ENV{XCATBYPASS}) {
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# Load plugins from either specified or default dir
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my %cmd_handlers;
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my @plugins_dirs = split('\:',$ENV{XCATBYPASS});
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if (-d $plugins_dirs[0]) {
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foreach (@plugins_dirs) {
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$plugins_dir = $_;
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scan_plugins();
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}
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} else {
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# figure out default plugins dir
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my $sitetab=xCAT::Table->new('site');
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unless ($sitetab) {
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print ("ERROR: Unable to open basic site table for configuration\n");
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}
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$::XCATPREFIX = '/usr';
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my ($tmp) = $sitetab->getAttribs({'key'=>'xcatprefix'},'value');
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if ($tmp and $tmp->{value}) {
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$::XCATPREFIX = $tmp->{value};
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}
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$plugins_dir=$::XCATPREFIX.'/lib/xcat/plugins';
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scan_plugins();
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}
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# don't do XML transformation -- assume request is well-formed
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# my $xmlreq=XMLout($request,RootName=>xcatrequest,NoAttr=>1,KeyAttr=>[]);
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# $request = XMLin($xmlreq,SuppressEmpty=>undef,ForceArray=>1) ;
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# Call the plugin directly
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# ${"xCAT_plugin::".$modname."::"}{process_request}->($request,$callback);
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plugin_command($request,undef,$callback);
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return 0;
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}
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# No XCATBYPASS, so establish a socket connection with the xcatd daemon
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# and submit the request
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if ($ENV{XCATHOST}) {
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$xcathost=$ENV{XCATHOST};
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}
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my $client = IO::Socket::SSL->new(
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PeerAddr => $xcathost,
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SSL_key_file => $ENV{HOME}."/.xcat/client-key.pem",
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SSL_cert_file => $ENV{HOME}."/.xcat/client-cert.pem",
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SSL_ca_file => $ENV{HOME}."/.xcat/ca.pem",
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SSL_use_cert => 1,
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);
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die "Connection failure: $!\n" unless ($client);
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my $msg=XMLout($request,RootName=>xcatrequest,NoAttr=>1,KeyAttr=>[]);
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print $client $msg;
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my $response;
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my $rsp;
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while (<$client>) {
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$response .= $_;
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if ($response =~ m/<\/xcatresponse>/) {
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$rsp = XMLin($response,SuppressEmpty=>undef,ForceArray=>1);
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$response='';
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if ($rsp->{warning}) {
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printf ("Warning: ".$rsp->{warning}->[0]."\n");
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}
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if ($rsp->{error}) {
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printf "Error: ". $rsp->{error}->[0]."\n";
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}
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$callback->($rsp);
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if ($rsp->{serverdone}) {
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last;
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}
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}
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}
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###################################
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# scan_plugins
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# will load all plugin perl modules and build a list of supported
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# commands
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#
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# NOTE: This is copied from xcatd (last merge 10/3/07).
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# Will eventually move to using common source....
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###################################
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sub scan_plugins {
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my @plugins=glob($plugins_dir."/*.pm");
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foreach (@plugins) {
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/.*\/([^\/]*).pm$/;
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my $modname = $1;
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require "$_";
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no strict 'refs';
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my $cmd_adds=${"xCAT_plugin::".$modname."::"}{handled_commands}->();
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foreach (keys %$cmd_adds) {
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my $value = $_;
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if (defined($cmd_handlers{$_})) {
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my $add=1;
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#This next bit of code iterates through the handlers.
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#If the value doesn't contain an equal, and has an equivalent entry added by
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# another plugin already, don't add (otherwise would hit the DB multiple times)
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# a better idea, restructure the cmd_handlers as a multi-level hash
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# prove out this idea real quick before doing that
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foreach (@{$cmd_handlers{$_}}) {
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if (($_->[1] eq $cmd_adds->{$value}) and (($cmd_adds->{$value} !~ /=/) or ($_->[0] eq $modname))) {
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$add = 0;
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}
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}
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if ($add) { push @{$cmd_handlers{$_}},[$modname,$cmd_adds->{$_}]; }
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#die "Conflicting handler information from $modname";
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} else {
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$cmd_handlers{$_} = [ [$modname,$cmd_adds->{$_}] ];
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}
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}
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}
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}
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###################################
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# plugin_command
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# will invoke the correct plugin
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#
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# NOTE: This is copied from xcatd (last merge 10/3/07).
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# Will eventually move to using common source....
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###################################
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sub plugin_command {
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my $req = shift;
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my $sock = shift;
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my $callback = shift;
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my %handler_hash;
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# use xCAT::NodeRange;
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$Main::resps={};
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my @nodes;
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if ($req->{node}) {
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@nodes = @{$req->{node}};
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} elsif ($req->{noderange}) {
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@nodes = noderange($req->{noderange}->[0]);
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if (nodesmissed) {
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# my $rsp = {errorcode=>1,error=>"Invalid nodes in noderange:".join(',',nodesmissed)};
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print "Invalid nodes in noderange:".join(',',nodesmissed)."\n";
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# if ($sock) {
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# print $sock XMLout($rsp,RootName=>'xcatresponse' ,NoAttr=>1);
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# }
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# return ($rsp);
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return 1;
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}
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}
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if (@nodes) { $req->{node} = \@nodes; }
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if (defined($cmd_handlers{$req->{command}->[0]})) {
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my $hdlspec;
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foreach (@{$cmd_handlers{$req->{command}->[0]}}) {
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$hdlspec =$_->[1];
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my $ownmod = $_->[0];
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if ($hdlspec =~ /:/) { #Specificed a table lookup path for plugin name
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my $table;
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my $cols;
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($table,$cols) = split(/:/,$hdlspec);
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my @colmns=split(/,/,$cols);
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my @columns;
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my $hdlrtable=xCAT::Table->new($table);
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unless ($hdlrtable) {
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#TODO: proper error handling
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}
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my $node;
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my $colvals = {};
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foreach my $colu (@colmns) {
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if ($colu =~ /=/) { #a value redirect to a pattern/specific name
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my $coln; my $colv;
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($coln,$colv) = split(/=/,$colu,2);
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$colvals->{$coln} = $colv;
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push (@columns,$coln);
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} else {
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push (@columns,$colu);
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}
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}
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foreach $node (@nodes) {
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my $attribs = $hdlrtable->getNodeAttribs($node,\@columns);
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unless (defined($attribs)) { next; } #TODO: This really ought to craft an unsupported response for this request
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foreach (@columns) {
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my $col=$_;
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if (defined($attribs->{$col})) {
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if ($colvals->{$col}) { #A pattern match style request.
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if ($attribs->{$col} =~ /$colvals->{$col}/) {
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$handler_hash{$ownmod}->{$node} = 1;
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last;
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}
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} else {
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$handler_hash{$attribs->{$col}}->{$node} = 1;
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last;
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}
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}
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}
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}
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} else {
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unless (@nodes) {
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$handler_hash{$hdlspec} = 1;
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}
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foreach (@nodes) { #Specified a specific plugin, not a table lookup
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$handler_hash{$hdlspec}->{$_} = 1;
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}
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}
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}
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} else {
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print "$req->{command}->[0] xCAT command not found \n";
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return 1; #TODO: error back that request has no known plugin for it
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}
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## FOR NOW, DON'T FORK CHILD PROCESS TO MAKE BYPASS SIMPLER AND EASIER TO DEBUG
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# my $children=0;
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# $SIG{CHLD} = sub {while (waitpid(-1, WNOHANG) > 0) { $children--; } };
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# my $check_fds;
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# if ($sock) {
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# $check_fds = new IO::Select;
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# }
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foreach (keys %handler_hash) {
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my $modname = $_;
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if (-r $plugins_dir."/".$modname.".pm") {
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require $plugins_dir."/".$modname.".pm";
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# $children++;
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# my $pfd; #will be referenced for inter-process messaging.
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# my $child;
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# if ($sock) { #If $sock not passed in, don't fork..
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# socketpair($pfd, $parent_fd,AF_UNIX,SOCK_STREAM,PF_UNSPEC) or die "socketpair: $!";
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# #pipe($pfd,$cfd);
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# $parent_fd->autoflush(1);
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# $pfd->autoflush(1);
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# $child = fork;
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# } else {
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# $child = 0;
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# }
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# unless (defined $child) { die "Fork failed"; }
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# if ($child == 0) {
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# if ($sock) { close $pfd; }
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unless ($handler_hash{$_} == 1) {
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my @nodes = sort {($a =~ /(\d+)/)[0] <=> ($b =~ /(\d+)/)[0] || $a cmp $b } (keys %{$handler_hash{$_}});
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$req->{node}=\@nodes;
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}
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no strict "refs";
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${"xCAT_plugin::".$modname."::"}{process_request}->($req,$callback,\&do_request);
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# if ($sock) {
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# close($parent_fd);
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# exit(0);
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# }
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# } else {
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# close $parent_fd;
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# $check_fds->add($pfd);
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# }
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}
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}
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unless ($sock) { return $Main::resps };
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# while ($children > 0) {
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# relay_fds($check_fds,$sock);
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# }
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# #while (relay_fds($check_fds,$sock)) {}
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# my %done;
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# $done{serverdone} = {};
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# if ($req->{transid}) {
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# $done{transid}=$req->{transid}->[0];
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# }
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# if ($sock) { print $sock XMLout(\%done,RootName => 'xcatresponse',NoAttr=>1); }
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}
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###################################
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# do_request
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# called from a plugin to execute another xCAT plugin command internally
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#
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# NOTE: This is copied from xcatd (last merge 10/3/07).
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# Will eventually move to using common source....
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###################################
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sub do_request {
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my $req = shift;
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my $second = shift;
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my $rsphandler = \&build_response;
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my $sock = undef;
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if ($second) {
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if (ref($second) eq "CODE") {
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$rsphandler = $second;
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} elsif (ref($second) eq "GLOB") {
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$sock = $second;
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}
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}
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#my $sock = shift; #If no sock, will return a response hash
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if ($cmd_handlers{$req->{command}->[0]}) {
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return plugin_command($req,$sock,$rsphandler);
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} elsif ($req->{command}->[0] eq "noderange" and $req->{noderange}) {
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my @nodes = noderange($req->{noderange}->[0]);
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my %resp;
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if (nodesmissed) {
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$resp{warning}="Invalid nodes in noderange:".join ',',nodesmissed ."\n";
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}
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$resp{serverdone} = {};
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@{$resp{node}}=@nodes;
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if ($req->{transid}) {
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$resp{transid}=$req->{transid}->[0];
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}
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if ($sock) {
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print $sock XMLout(\%resp,RootName => 'xcatresponse',NoAttr=>1);
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} else {
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return (\%resp);
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}
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} else {
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my %resp=(error=>"Unsupported request");
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$resp{serverdone} = {};
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if ($req->{transid}) {
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$resp{transid}=$req->{transid}->[0];
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}
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if ($sock) {
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print $sock XMLout(\%resp,RootName => 'xcatresponse',NoAttr=>1);
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} else {
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return (\%resp);
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}
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}
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}
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###################################
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# build_response
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# This callback handles responses from nested level plugin calls.
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# It builds a merged hash of all responses that gets passed back
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# to the calling plugin.
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# Note: Need to create a "deep clone" of this response to add to the
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# return, otherwise next time through the referenced data is overwritten
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#
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###################################
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sub build_response {
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my $rsp = shift;
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foreach (keys %$rsp) {
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my $subresp = dclone($rsp->{$_});
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push (@{$Main::resps->{$_}}, @{$subresp});
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}
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}
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}
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