201 lines
7.3 KiB
Perl
Executable File
201 lines
7.3 KiB
Perl
Executable File
#!/usr/bin/perl -w
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#
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# $Id$
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# Maintains set of NBIs based on currently-installed kernels
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# Network card module sets are taken from /etc/mknbi-set.conf
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use strict;
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use vars qw($verbosity);
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use constant EB_PCI_DEVICE => 1;
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# Utility function: calculate output id given a kernel file name and
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# space-separated list of modules
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sub calc_output_id ($$) {
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my $kernel = shift;
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my $moduleset = shift;
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my $kernel_ver = "";
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( $kernel_ver ) = ( $kernel =~ /vmlinuz-(.*)$/ );
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( my $output_id = "$moduleset".( $kernel_ver ? ".$kernel_ver" : "" ) ) =~ tr/,/./;
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return ( $kernel_ver, $output_id );
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}
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# Utility function: read modules.pcimap-style file
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# Add modules to modulesets hash, write out dhcpd.conf fragment
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sub read_config_file ($$$$) {
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my $configfile = shift;
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my $modulesets = shift;
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my $dhcpfh = shift;
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my $alwaysuse = shift;
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print "Scanning through $configfile for network modules...\n" if $verbosity >= 1;
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open CF, $configfile or die "Could not open $configfile: $!\n";
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chomp ( my $tempmodule = `mktemp /tmp/mknbi-set.XXXXXX` );
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chomp ( my $cwd = `pwd` ); chdir '/'; # Modprobe searches the current directory...
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print $dhcpfh " \# Generated from $configfile\n";
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while (<CF>) {
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chomp;
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next if /^[\#;]/ or /^\s*$/;
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( my $module, undef, my $vendor, my $device ) = /^(\S+)(\s+(\S+)\s+(\S+))?/ ;
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$modulesets->{$module} = 1 if $alwaysuse;
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if ( ! exists $modulesets->{$module} ) {
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# Check to see if module is a network module
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# Only do this the first time we encounter a module
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my @modulepaths = `/sbin/modprobe -l $module.o*` ;
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chomp ( my $modulepath = $modulepaths[0] );
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if ( $modulepath ) {
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if ( $modulepath =~ /.o.gz$/ ) {
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system ( "zcat $modulepath > $tempmodule" );
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} else {
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system ( "cp $modulepath $tempmodule" );
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}
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$modulesets->{$module} = 0;
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foreach ( `nm $tempmodule` ) {
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chomp;
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$modulesets->{$module} = 1 if /(ether|wlan)/ ;
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}
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unlink $tempmodule;
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} else {
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print STDERR "Cannot locate module $module specified in $configfile\n";
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}
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}
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if ( $modulesets->{$module} ) {
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if ( $vendor ) {
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print "$module ($vendor,$device) listed in $configfile\n" if $verbosity >= 2;
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printf $dhcpfh ( " if option etherboot.nic-dev-id = %02x:%02x:%02x:%02x:%02x { option etherboot.kmod \"%s\"; }\n",
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EB_PCI_DEVICE,
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( hex($vendor) >> 8 ) & 0xff, hex($vendor) & 0xff,
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( hex($device) >> 8 ) & 0xff, hex($device) & 0xff,
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$module );
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} else {
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print "$module (without PCI IDs) listed in $configfile\n" if $verbosity >= 2;
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}
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}
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}
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close CF;
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print $dhcpfh "\n";
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chdir $cwd;
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}
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my $conffile = '/etc/mknbi-set.conf';
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my $mkinitrd_net = 'mkinitrd-net';
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my $mknbi = 'mknbi-linux';
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my $output_dir = '/var/lib/tftpboot';
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my $dhcpfile = '/etc/dhcpd.conf.etherboot-pcimap.include';
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my $use_local;
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our $verbosity = 1;
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my $modulesets = {};
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my $kernel = '';
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my @kernels = ();
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my $usage="Usage: $0 [-l|--local] [-q] [-v] [-r|--refresh module[,module...]] [--help]";
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# Parse command-line options
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while ( $_ = shift ) {
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if ( /-l|--local/ ) {
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$conffile = 'mknbi-set.conf';
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$mkinitrd_net = './mkinitrd-net';
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$mknbi = './mknbi-linux --format=nbi --target=linux';
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$output_dir = 'tftpboot';
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$dhcpfile = 'tftpboot/dhcpd.conf.etherboot-pcimap.include';
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$use_local = 1;
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} elsif ( /-r|--refresh/ ) {
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my $moduleset = shift;
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$modulesets->{$moduleset} = 1;
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} elsif ( /-k|--kernel/ ) {
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$kernel = shift;
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} elsif ( /-v|--verbose/ ) {
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$verbosity++;
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} elsif ( /-q|--quiet/ ) {
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$verbosity--;
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} elsif ( /--help/ ) {
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die "$usage\n".
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" -k, --kernel Build NBIs for a particular kernel\n".
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" -l, --local Run locally from CVS (for developers only)\n".
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" -r, --refresh Refresh NBI for a particular module\n".
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" -v, --verbose Be more verbose\n".
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" -q, --quiet Be less verbose\n";
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} else {
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die "$usage\n";
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}
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}
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# Get set of current kernels
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if ($kernel) {
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@kernels = ( $kernel );
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} else {
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@kernels = glob('/boot/vmlinuz*');
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}
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die "Could not find any kernels in /boot\n" unless @kernels;
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# If modules have been specified via --refresh, do not scan for modules or rewrite the
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# dhcpd.conf fragment file
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unless ( %$modulesets ) {
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# Write dhcpd.conf fragment file
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open my $dhcpfh, ">$dhcpfile" or die "Could not open $dhcpfile for writing: $!\n";
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print $dhcpfh "# Etherboot PCI ID -> Linux kernel module mapping file\n";
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print $dhcpfh "# Generated by mknbi-set on ".(scalar localtime)."\n";
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print $dhcpfh "#\n";
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print $dhcpfh "if substring ( option vendor-class-identifier, 0, 9 ) = \"Etherboot\" {\n";
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print $dhcpfh " if exists etherboot.nic-dev-id {\n";
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print $dhcpfh " \# Legacy nic-dev-id mechanism: there are some DLink DFE538 cards in circulation that\n";
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print $dhcpfh " \# predated the change to the new nic-dev-id binary structure\n";
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print $dhcpfh " if option etherboot.nic-dev-id = \"PCI:1186:1300\" { option etherboot.kmod \"8139too\"; }\n";
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print $dhcpfh "\n";
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# Get set of network modules to build NBIs for
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# Read explicitly-specified module sets from $conffile
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read_config_file($conffile, $modulesets, $dhcpfh, 1);
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# Obtain list of all network modules from pcimap file
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my $pcimap;
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foreach ( `/sbin/modprobe -c` ) {
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$pcimap = $1 if /^pcimap.*?=(.*)$/;
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}
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if ( $pcimap ) {
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read_config_file($pcimap, $modulesets, $dhcpfh, 0);
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} else {
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print STDERR "Could not identify pcimap file\n";
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}
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# Finish off dhcpd.conf fragment file
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print $dhcpfh " }\n}\n";
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close $dhcpfh;
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}
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# Build initrd and nbi for each kernel-moduleset combination
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foreach my $moduleset ( sort keys %$modulesets ) {
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next unless $modulesets->{$moduleset}; # Ignore if value is 0
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print "Building NBIs for module set $moduleset\n" if $verbosity >= 1;
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foreach my $kernel ( @kernels ) {
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( my $kernel_ver, my $output_id ) = calc_output_id ( $kernel, $moduleset );
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if ( -l $kernel ) {
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# Symbolic link; create matching symlink
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my $real_kernel = readlink ( $kernel );
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( my $real_kernel_ver, my $real_output_id ) = calc_output_id ( $real_kernel, $moduleset );
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print "Symlinking $output_id to $real_output_id\n" if $verbosity >= 2;
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my $initrd_file = "$output_dir/initrd-$output_id.img";
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unlink ( $initrd_file ) if -l $initrd_file;
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system ( "ln -s initrd-$real_output_id.img $initrd_file" ) == 0 or print STDERR "Could not symlink $initrd_file to initrd-$real_output_id.img: $!\n";
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my $nbi_file = "$output_dir/boot-$output_id.nbi";
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unlink ( $nbi_file ) if -l $nbi_file;
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system ( "ln -s boot-$real_output_id.nbi $nbi_file" ) == 0 or print STDERR "Could not symlink $nbi_file to boot-$real_output_id.nbi: $!\n";
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} else {
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# Real file: create initrd and nbi
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print "Creating initrd and nbi for $output_id\n" if $verbosity >= 2;
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( my $moduleset_spaces = $moduleset ) =~ tr/,/ /;
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my $initrd_cmd = "$mkinitrd_net --nolink ".
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( $use_local ? "--local " : "" ).
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( $kernel_ver ? "--kernel $kernel_ver " : "" ).
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( $verbosity >= 2 ? "" : "-q " ).
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$moduleset_spaces;
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print "$initrd_cmd\n" if $verbosity >= 3;
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if ( system ( $initrd_cmd ) == 0 ) {
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my $mknbi_cmd = "$mknbi $kernel $output_dir/initrd-$output_id.img > $output_dir/boot-$output_id.nbi";
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print "$mknbi_cmd\n" if $verbosity >= 3;
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system ( $mknbi_cmd ) == 0 or print STDERR "mknbi failed: $!\n";
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} else {
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print STDERR "$initrd_cmd failed: $!\n";
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}
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}
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}
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}
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