3
0
Fork 0
forked from mirrors/nixpkgs
nixpkgs/nixos/modules/installer/tools/nixos-generate-config.pl
(cdep)illabout 46ecec8239
nixos/cpufreq: Remove the alias to set the cpu frequency governor
This PR temporarily fixes the issue with PR 53041 as explained
here:

https://github.com/NixOS/nixpkgs/pull/53041#commitcomment-31825338

The alias `powerManagement.cpufreq.governor` to
`powerManagement.cpuFreqGovernor` has been removed.
2019-01-03 20:57:49 +09:00

653 lines
19 KiB
Perl
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

#! @perl@
use strict;
use Cwd 'abs_path';
use File::Spec;
use File::Path;
use File::Basename;
use File::Slurp;
use File::stat;
umask(0022);
sub uniq {
my %seen;
my @res = ();
foreach my $s (@_) {
if (!defined $seen{$s}) {
$seen{$s} = 1;
push @res, $s;
}
}
return @res;
}
sub runCommand {
my ($cmd) = @_;
open FILE, "$cmd 2>&1 |" or die "Failed to execute: $cmd\n";
my @ret = <FILE>;
close FILE;
return ($?, @ret);
}
# Process the command line.
my $outDir = "/etc/nixos";
my $rootDir = ""; # = /
my $force = 0;
my $noFilesystems = 0;
my $showHardwareConfig = 0;
for (my $n = 0; $n < scalar @ARGV; $n++) {
my $arg = $ARGV[$n];
if ($arg eq "--help") {
exec "man nixos-generate-config" or die;
}
elsif ($arg eq "--dir") {
$n++;
$outDir = $ARGV[$n];
die "$0: --dir requires an argument\n" unless defined $outDir;
}
elsif ($arg eq "--root") {
$n++;
$rootDir = $ARGV[$n];
die "$0: --root requires an argument\n" unless defined $rootDir;
$rootDir =~ s/\/*$//; # remove trailing slashes
}
elsif ($arg eq "--force") {
$force = 1;
}
elsif ($arg eq "--no-filesystems") {
$noFilesystems = 1;
}
elsif ($arg eq "--show-hardware-config") {
$showHardwareConfig = 1;
}
else {
die "$0: unrecognized argument $arg\n";
}
}
my @attrs = ();
my @kernelModules = ();
my @initrdKernelModules = ();
my @initrdAvailableKernelModules = ();
my @modulePackages = ();
my @imports;
sub debug {
return unless defined $ENV{"DEBUG"};
print STDERR @_;
}
my $cpuinfo = read_file "/proc/cpuinfo";
sub hasCPUFeature {
my $feature = shift;
return $cpuinfo =~ /^flags\s*:.* $feature( |$)/m;
}
# Detect the number of CPU cores.
my $cpus = scalar (grep {/^processor\s*:/} (split '\n', $cpuinfo));
# Determine CPU governor to use
if (-e "/sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors") {
my $governors = read_file("/sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors");
# ondemand governor is not available on sandy bridge or later Intel CPUs
my @desired_governors = ("ondemand", "powersave");
my $e;
foreach $e (@desired_governors) {
if (index($governors, $e) != -1) {
last if (push @attrs, "powerManagement.cpuFreqGovernor = lib.mkDefault \"$e\";");
}
}
}
# Virtualization support?
push @kernelModules, "kvm-intel" if hasCPUFeature "vmx";
push @kernelModules, "kvm-amd" if hasCPUFeature "svm";
# Look at the PCI devices and add necessary modules. Note that most
# modules are auto-detected so we don't need to list them here.
# However, some are needed in the initrd to boot the system.
my $videoDriver;
sub pciCheck {
my $path = shift;
my $vendor = read_file "$path/vendor"; chomp $vendor;
my $device = read_file "$path/device"; chomp $device;
my $class = read_file "$path/class"; chomp $class;
my $module;
if (-e "$path/driver/module") {
$module = basename `readlink -f $path/driver/module`;
chomp $module;
}
debug "$path: $vendor $device $class";
debug " $module" if defined $module;
debug "\n";
if (defined $module) {
# See the bottom of http://pciids.sourceforge.net/pci.ids for
# device classes.
if (# Mass-storage controller. Definitely important.
$class =~ /^0x01/ ||
# Firewire controller. A disk might be attached.
$class =~ /^0x0c00/ ||
# USB controller. Needed if we want to use the
# keyboard when things go wrong in the initrd.
$class =~ /^0x0c03/
)
{
push @initrdAvailableKernelModules, $module;
}
}
# broadcom STA driver (wl.ko)
# list taken from http://www.broadcom.com/docs/linux_sta/README.txt
if ($vendor eq "0x14e4" &&
($device eq "0x4311" || $device eq "0x4312" || $device eq "0x4313" ||
$device eq "0x4315" || $device eq "0x4327" || $device eq "0x4328" ||
$device eq "0x4329" || $device eq "0x432a" || $device eq "0x432b" ||
$device eq "0x432c" || $device eq "0x432d" || $device eq "0x4353" ||
$device eq "0x4357" || $device eq "0x4358" || $device eq "0x4359" ||
$device eq "0x4331" || $device eq "0x43a0" || $device eq "0x43b1"
) )
{
push @modulePackages, "config.boot.kernelPackages.broadcom_sta";
push @kernelModules, "wl";
}
# broadcom FullMac driver
# list taken from
# https://wireless.wiki.kernel.org/en/users/Drivers/brcm80211#brcmfmac
if ($vendor eq "0x14e4" &&
($device eq "0x43a3" || $device eq "0x43df" || $device eq "0x43ec" ||
$device eq "0x43d3" || $device eq "0x43d9" || $device eq "0x43e9" ||
$device eq "0x43ba" || $device eq "0x43bb" || $device eq "0x43bc" ||
$device eq "0xaa52" || $device eq "0x43ca" || $device eq "0x43cb" ||
$device eq "0x43cc" || $device eq "0x43c3" || $device eq "0x43c4" ||
$device eq "0x43c5"
) )
{
# we need e.g. brcmfmac43602-pcie.bin
push @imports, "<nixpkgs/nixos/modules/hardware/network/broadcom-43xx.nix>";
}
# Can't rely on $module here, since the module may not be loaded
# due to missing firmware. Ideally we would check modules.pcimap
# here.
push @attrs, "networking.enableIntel2200BGFirmware = true;" if
$vendor eq "0x8086" &&
($device eq "0x1043" || $device eq "0x104f" || $device eq "0x4220" ||
$device eq "0x4221" || $device eq "0x4223" || $device eq "0x4224");
push @attrs, "networking.enableIntel3945ABGFirmware = true;" if
$vendor eq "0x8086" &&
($device eq "0x4229" || $device eq "0x4230" ||
$device eq "0x4222" || $device eq "0x4227");
# Assume that all NVIDIA cards are supported by the NVIDIA driver.
# There may be exceptions (e.g. old cards).
# FIXME: do we want to enable an unfree driver here?
#$videoDriver = "nvidia" if $vendor eq "0x10de" && $class =~ /^0x03/;
}
foreach my $path (glob "/sys/bus/pci/devices/*") {
pciCheck $path;
}
# Idem for USB devices.
sub usbCheck {
my $path = shift;
my $class = read_file "$path/bInterfaceClass"; chomp $class;
my $subclass = read_file "$path/bInterfaceSubClass"; chomp $subclass;
my $protocol = read_file "$path/bInterfaceProtocol"; chomp $protocol;
my $module;
if (-e "$path/driver/module") {
$module = basename `readlink -f $path/driver/module`;
chomp $module;
}
debug "$path: $class $subclass $protocol";
debug " $module" if defined $module;
debug "\n";
if (defined $module) {
if (# Mass-storage controller. Definitely important.
$class eq "08" ||
# Keyboard. Needed if we want to use the
# keyboard when things go wrong in the initrd.
($class eq "03" && $protocol eq "01")
)
{
push @initrdAvailableKernelModules, $module;
}
}
}
foreach my $path (glob "/sys/bus/usb/devices/*") {
if (-e "$path/bInterfaceClass") {
usbCheck $path;
}
}
# Add the modules for all block and MMC devices.
foreach my $path (glob "/sys/class/{block,mmc_host}/*") {
my $module;
if (-e "$path/device/driver/module") {
$module = basename `readlink -f $path/device/driver/module`;
chomp $module;
push @initrdAvailableKernelModules, $module;
}
}
my $virt = `systemd-detect-virt`;
chomp $virt;
# Check if we're a VirtualBox guest. If so, enable the guest
# additions.
if ($virt eq "oracle") {
push @attrs, "virtualisation.virtualbox.guest.enable = true;"
}
# Likewise for QEMU.
if ($virt eq "qemu" || $virt eq "kvm" || $virt eq "bochs") {
push @imports, "<nixpkgs/nixos/modules/profiles/qemu-guest.nix>";
}
# Also for Hyper-V.
if ($virt eq "microsoft") {
push @attrs, "virtualisation.hypervGuest.enable = true;"
}
# Pull in NixOS configuration for containers.
if ($virt eq "systemd-nspawn") {
push @attrs, "boot.isContainer = true;";
}
# Provide firmware for devices that are not detected by this script,
# unless we're in a VM/container.
push @imports, "<nixpkgs/nixos/modules/installer/scan/not-detected.nix>"
if $virt eq "none";
# For a device name like /dev/sda1, find a more stable path like
# /dev/disk/by-uuid/X or /dev/disk/by-label/Y.
sub findStableDevPath {
my ($dev) = @_;
return $dev if substr($dev, 0, 1) ne "/";
return $dev unless -e $dev;
my $st = stat($dev) or return $dev;
foreach my $dev2 (glob("/dev/disk/by-uuid/*"), glob("/dev/mapper/*"), glob("/dev/disk/by-label/*")) {
my $st2 = stat($dev2) or next;
return $dev2 if $st->rdev == $st2->rdev;
}
return $dev;
}
push @attrs, "services.xserver.videoDrivers = [ \"$videoDriver\" ];" if $videoDriver;
# Generate the swapDevices option from the currently activated swap
# devices.
my @swaps = read_file("/proc/swaps", err_mode => 'carp');
my @swapDevices;
if (@swaps) {
shift @swaps;
foreach my $swap (@swaps) {
$swap =~ /^(\S+)\s/;
next unless -e $1;
my $dev = findStableDevPath $1;
push @swapDevices, "{ device = \"$dev\"; }";
}
}
# Generate the fileSystems option from the currently mounted
# filesystems.
sub in {
my ($d1, $d2) = @_;
return $d1 eq $d2 || substr($d1, 0, length($d2) + 1) eq "$d2/";
}
my $fileSystems;
my %fsByDev;
foreach my $fs (read_file("/proc/self/mountinfo")) {
chomp $fs;
my @fields = split / /, $fs;
my $mountPoint = $fields[4];
next unless -d $mountPoint;
my @mountOptions = split /,/, $fields[5];
next if !in($mountPoint, $rootDir);
$mountPoint = substr($mountPoint, length($rootDir)); # strip the root directory (e.g. /mnt)
$mountPoint = "/" if $mountPoint eq "";
# Skip special filesystems.
next if in($mountPoint, "/proc") || in($mountPoint, "/dev") || in($mountPoint, "/sys") || in($mountPoint, "/run") || $mountPoint eq "/var/lib/nfs/rpc_pipefs";
# Skip the optional fields.
my $n = 6; $n++ while $fields[$n] ne "-"; $n++;
my $fsType = $fields[$n];
my $device = $fields[$n + 1];
my @superOptions = split /,/, $fields[$n + 2];
# Skip the read-only bind-mount on /nix/store.
next if $mountPoint eq "/nix/store" && (grep { $_ eq "rw" } @superOptions) && (grep { $_ eq "ro" } @mountOptions);
# Maybe this is a bind-mount of a filesystem we saw earlier?
if (defined $fsByDev{$fields[2]}) {
# Make sure this isn't a btrfs subvolume.
my $msg = `btrfs subvol show $rootDir$mountPoint`;
if ($? != 0 || $msg =~ /ERROR:/s) {
my $path = $fields[3]; $path = "" if $path eq "/";
my $base = $fsByDev{$fields[2]};
$base = "" if $base eq "/";
$fileSystems .= <<EOF;
fileSystems.\"$mountPoint\" =
{ device = \"$base$path\";
fsType = \"none\";
options = \[ \"bind\" \];
};
EOF
next;
}
}
$fsByDev{$fields[2]} = $mountPoint;
# We don't know how to handle FUSE filesystems.
if ($fsType eq "fuseblk" || $fsType eq "fuse") {
print STDERR "warning: don't know how to emit fileSystem option for FUSE filesystem $mountPoint\n";
next;
}
# Is this a mount of a loopback device?
my @extraOptions;
if ($device =~ /\/dev\/loop(\d+)/) {
my $loopnr = $1;
my $backer = read_file "/sys/block/loop$loopnr/loop/backing_file";
if (defined $backer) {
chomp $backer;
$device = $backer;
push @extraOptions, "loop";
}
}
# Is this a btrfs filesystem?
if ($fsType eq "btrfs") {
my ($status, @info) = runCommand("btrfs subvol show $rootDir$mountPoint");
if ($status != 0 || join("", @info) =~ /ERROR:/) {
die "Failed to retrieve subvolume info for $mountPoint\n";
}
my @ids = join("\n", @info) =~ m/^(?!\/\n).*Subvolume ID:[ \t\n]*([0-9]+)/s;
if ($#ids > 0) {
die "Btrfs subvol name for $mountPoint listed multiple times in mount\n"
} elsif ($#ids == 0) {
my @paths = join("", @info) =~ m/^([^\n]*)/;
if ($#paths > 0) {
die "Btrfs returned multiple paths for a single subvolume id, mountpoint $mountPoint\n";
} elsif ($#paths != 0) {
die "Btrfs did not return a path for the subvolume at $mountPoint\n";
}
push @extraOptions, "subvol=$paths[0]";
}
}
# Emit the filesystem.
$fileSystems .= <<EOF;
fileSystems.\"$mountPoint\" =
{ device = \"${\(findStableDevPath $device)}\";
fsType = \"$fsType\";
EOF
if (scalar @extraOptions > 0) {
$fileSystems .= <<EOF;
options = \[ ${\join " ", map { "\"" . $_ . "\"" } uniq(@extraOptions)} \];
EOF
}
$fileSystems .= <<EOF;
};
EOF
# If this filesystem is on a LUKS device, then add a
# boot.initrd.luks.devices entry.
if (-e $device) {
my $deviceName = basename(abs_path($device));
if (-e "/sys/class/block/$deviceName"
&& read_file("/sys/class/block/$deviceName/dm/uuid", err_mode => 'quiet') =~ /^CRYPT-LUKS/)
{
my @slaves = glob("/sys/class/block/$deviceName/slaves/*");
if (scalar @slaves == 1) {
my $slave = "/dev/" . basename($slaves[0]);
if (-e $slave) {
my $dmName = read_file("/sys/class/block/$deviceName/dm/name");
chomp $dmName;
$fileSystems .= " boot.initrd.luks.devices.\"$dmName\".device = \"${\(findStableDevPath $slave)}\";\n\n";
}
}
}
}
}
# Generate the hardware configuration file.
sub toNixStringList {
my $res = "";
foreach my $s (@_) {
$res .= " \"$s\"";
}
return $res;
}
sub toNixList {
my $res = "";
foreach my $s (@_) {
$res .= " $s";
}
return $res;
}
sub multiLineList {
my $indent = shift;
return " [ ]" if !@_;
my $res = "\n${indent}[ ";
my $first = 1;
foreach my $s (@_) {
$res .= "$indent " if !$first;
$first = 0;
$res .= "$s\n";
}
$res .= "$indent]";
return $res;
}
my $initrdAvailableKernelModules = toNixStringList(uniq @initrdAvailableKernelModules);
my $kernelModules = toNixStringList(uniq @kernelModules);
my $modulePackages = toNixList(uniq @modulePackages);
my $fsAndSwap = "";
if (!$noFilesystems) {
$fsAndSwap = "\n$fileSystems ";
$fsAndSwap .= "swapDevices =" . multiLineList(" ", @swapDevices) . ";\n";
}
my $hwConfig = <<EOF;
# Do not modify this file! It was generated by nixos-generate-config
# and may be overwritten by future invocations. Please make changes
# to /etc/nixos/configuration.nix instead.
{ config, lib, pkgs, ... }:
{
imports =${\multiLineList(" ", @imports)};
boot.initrd.availableKernelModules = [$initrdAvailableKernelModules ];
boot.kernelModules = [$kernelModules ];
boot.extraModulePackages = [$modulePackages ];
$fsAndSwap
nix.maxJobs = lib.mkDefault $cpus;
${\join "", (map { " $_\n" } (uniq @attrs))}}
EOF
if ($showHardwareConfig) {
print STDOUT $hwConfig;
} else {
$outDir = "$rootDir$outDir";
my $fn = "$outDir/hardware-configuration.nix";
print STDERR "writing $fn...\n";
mkpath($outDir, 0, 0755);
write_file($fn, $hwConfig);
# Generate a basic configuration.nix, unless one already exists.
$fn = "$outDir/configuration.nix";
if ($force || ! -e $fn) {
print STDERR "writing $fn...\n";
my $bootLoaderConfig = "";
if (-e "/sys/firmware/efi/efivars") {
$bootLoaderConfig = <<EOF;
# Use the systemd-boot EFI boot loader.
boot.loader.systemd-boot.enable = true;
boot.loader.efi.canTouchEfiVariables = true;
EOF
} elsif (-e "/boot/extlinux") {
$bootLoaderConfig = <<EOF;
# Use the extlinux boot loader. (NixOS wants to enable GRUB by default)
boot.loader.grub.enable = false;
# Enables the generation of /boot/extlinux/extlinux.conf
boot.loader.generic-extlinux-compatible.enable = true;
EOF
} elsif ($virt ne "systemd-nspawn") {
$bootLoaderConfig = <<EOF;
# Use the GRUB 2 boot loader.
boot.loader.grub.enable = true;
boot.loader.grub.version = 2;
# boot.loader.grub.efiSupport = true;
# boot.loader.grub.efiInstallAsRemovable = true;
# boot.loader.efi.efiSysMountPoint = "/boot/efi";
# Define on which hard drive you want to install Grub.
# boot.loader.grub.device = "/dev/sda"; # or "nodev" for efi only
EOF
}
write_file($fn, <<EOF);
# Edit this configuration file to define what should be installed on
# your system. Help is available in the configuration.nix(5) man page
# and in the NixOS manual (accessible by running nixos-help).
{ config, pkgs, ... }:
{
imports =
[ # Include the results of the hardware scan.
./hardware-configuration.nix
];
$bootLoaderConfig
# networking.hostName = "nixos"; # Define your hostname.
# networking.wireless.enable = true; # Enables wireless support via wpa_supplicant.
# Configure network proxy if necessary
# networking.proxy.default = "http://user:password\@proxy:port/";
# networking.proxy.noProxy = "127.0.0.1,localhost,internal.domain";
# Select internationalisation properties.
# i18n = {
# consoleFont = "Lat2-Terminus16";
# consoleKeyMap = "us";
# defaultLocale = "en_US.UTF-8";
# };
# Set your time zone.
# time.timeZone = "Europe/Amsterdam";
# List packages installed in system profile. To search, run:
# \$ nix search wget
# environment.systemPackages = with pkgs; [
# wget vim
# ];
# Some programs need SUID wrappers, can be configured further or are
# started in user sessions.
# programs.mtr.enable = true;
# programs.gnupg.agent = { enable = true; enableSSHSupport = true; };
# List services that you want to enable:
# Enable the OpenSSH daemon.
# services.openssh.enable = true;
# Open ports in the firewall.
# networking.firewall.allowedTCPPorts = [ ... ];
# networking.firewall.allowedUDPPorts = [ ... ];
# Or disable the firewall altogether.
# networking.firewall.enable = false;
# Enable CUPS to print documents.
# services.printing.enable = true;
# Enable sound.
# sound.enable = true;
# hardware.pulseaudio.enable = true;
# Enable the X11 windowing system.
# services.xserver.enable = true;
# services.xserver.layout = "us";
# services.xserver.xkbOptions = "eurosign:e";
# Enable touchpad support.
# services.xserver.libinput.enable = true;
# Enable the KDE Desktop Environment.
# services.xserver.displayManager.sddm.enable = true;
# services.xserver.desktopManager.plasma5.enable = true;
# Define a user account. Don't forget to set a password with passwd.
# users.users.guest = {
# isNormalUser = true;
# uid = 1000;
# };
# This value determines the NixOS release with which your system is to be
# compatible, in order to avoid breaking some software such as database
# servers. You should change this only after NixOS release notes say you
# should.
system.stateVersion = "${\(qw(@release@))}"; # Did you read the comment?
}
EOF
} else {
print STDERR "warning: not overwriting existing $fn\n";
}
}
# workaround for a bug in substituteAll