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