diff options
Diffstat (limited to 'contrib/initrd/mknbi-set')
| -rwxr-xr-x | contrib/initrd/mknbi-set | 200 |
1 files changed, 200 insertions, 0 deletions
diff --git a/contrib/initrd/mknbi-set b/contrib/initrd/mknbi-set new file mode 100755 index 00000000..e61acac9 --- /dev/null +++ b/contrib/initrd/mknbi-set @@ -0,0 +1,200 @@ +#!/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"; + } + } + } +} |