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Update the grub configuration script to handle more complex filesystem layouts including full zfs / and /boot

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This commit is contained in:
William A. Kennington III 2013-10-21 01:17:23 -05:00
parent 02ab48d0ee
commit c5bdb469ce
1 changed files with 64 additions and 15 deletions
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79
nixos/modules/system/boot/loader/grub/install-grub.pl
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@ -1,5 +1,6 @@
use strict;
use warnings;
use Class::Struct;
use XML::LibXML;
use File::Basename;
use File::Path;
@ -47,20 +48,64 @@ print STDERR "updating GRUB $grubVersion menu...\n";
mkpath("/boot/grub", 0, 0700);
# Discover whether /boot is on the same filesystem as / and
# /nix/store. If not, then all kernels and initrds must be copied to
# /boot, and all paths in the GRUB config file must be relative to the
# root of the /boot filesystem. `$bootRoot' is the path to be
# prepended to paths under /boot.
my $bootRoot = "/boot";
if (stat("/")->dev != stat("/boot")->dev) {
$bootRoot = "";
$copyKernels = 1;
} elsif (stat("/boot")->dev != stat("/nix/store")->dev) {
# /boot.
if (stat("/boot")->dev != stat("/nix")->dev) {
$copyKernels = 1;
}
# Discover information about the location of /boot
struct(Fs => {
device => '$',
type => '$',
mount => '$',
});
sub GetFs {
my ($dir) = @_;
my @boot = split(/[ \n\t]+/, `df -T "$dir" | tail -n 1`);
return Fs->new(device => $boot[0], type => $boot[1], mount => $boot[6]);
}
struct (Grub => {
path => '$',
search => '$',
});
my $driveid = 1;
sub GrubFs {
my ($dir) = @_;
my $fs = GetFs($dir);
my $path = "/" . substr($dir, length($fs->mount));
my $search = "";
if ($grubVersion > 1) {
if ($fs->type eq "zfs") {
my $sid = index($fs->device, "/");
if ($sid < 0) {
$search = "--label " . $fs->device;
$path = "/@" . $path;
} else {
$search = "--label " . substr($fs->device, 0, $sid);
$path = "/" . substr($fs->device, $sid) . "/@" . $path;
}
} else {
my $lbl = "/dev/disk/by-label/";
if (index($fs->device, $lbl) == 0) {
$search = "--label " . substr($fs->device, length($lbl));
}
my $uuid = "/dev/disk/by-uuid/";
if (index($fs->device, $uuid) == 0) {
$search = "--fs-uuid " . substr($fs->device, length($uuid));
}
}
if (not $search eq "") {
$search = "search --set=drive$driveid " . $search;
$path = "(\$drive$driveid)" . $path;
$driveid += 1;
}
}
return Grub->new(path => $path, search => $search);
}
my $grubBoot = GrubFs("/boot");
my $grubStore = GrubFs("/nix");
# Generate the header.
my $conf .= "# Automatically generated. DO NOT EDIT THIS FILE!\n";
@ -72,12 +117,14 @@ if ($grubVersion == 1) {
";
if ($splashImage) {
copy $splashImage, "/boot/background.xpm.gz" or die "cannot copy $splashImage to /boot\n";
$conf .= "splashimage $bootRoot/background.xpm.gz\n";
$conf .= "splashimage " . $grubBoot->path . "/background.xpm.gz\n";
}
}
else {
$conf .= "
" . $grubBoot->search . "
" . $grubStore->search . "
if [ -s \$prefix/grubenv ]; then
load_env
fi
@ -98,7 +145,7 @@ else {
set timeout=$timeout
fi
if loadfont $bootRoot/grub/fonts/unicode.pf2; then
if loadfont " . $grubBoot->path . "/grub/fonts/unicode.pf2; then
set gfxmode=640x480
insmod gfxterm
insmod vbe
@ -112,7 +159,7 @@ else {
copy $splashImage, "/boot/background.png" or die "cannot copy $splashImage to /boot\n";
$conf .= "
insmod png
if background_image $bootRoot/background.png; then
if background_image " . $grubBoot->path . "/background.png; then
set color_normal=white/black
set color_highlight=black/white
else
@ -134,7 +181,7 @@ mkpath("/boot/kernels", 0, 0755) if $copyKernels;
sub copyToKernelsDir {
my ($path) = @_;
return $path unless $copyKernels;
return $grubStore->path . substr($path, length("/nix")) unless $copyKernels;
$path =~ /\/nix\/store\/(.*)/ or die;
my $name = $1; $name =~ s/\//-/g;
my $dst = "/boot/kernels/$name";
@ -147,7 +194,7 @@ sub copyToKernelsDir {
rename $tmp, $dst or die "cannot rename $tmp to $dst\n";
}
$copied{$dst} = 1;
return "$bootRoot/kernels/$name";
return $grubBoot->path . "/kernels/$name";
}
sub addEntry {
@ -174,6 +221,8 @@ sub addEntry {
$conf .= " " . ($xen ? "module" : "initrd") . " $initrd\n\n";
} else {
$conf .= "menuentry \"$name\" {\n";
$conf .= $grubBoot->search . "\n";
$conf .= $grubStore->search . "\n";
$conf .= " $extraPerEntryConfig\n" if $extraPerEntryConfig;
$conf .= " multiboot $xen $xenParams\n" if $xen;
$conf .= " " . ($xen ? "module" : "linux") . " $kernel $kernelParams\n";
@ -191,7 +240,7 @@ addEntry("NixOS - Default", $defaultConfig);
$conf .= "$extraEntries\n" unless $extraEntriesBeforeNixOS;
# extraEntries could refer to @bootRoot@, which we have to substitute
$conf =~ s/\@bootRoot\@/$bootRoot/g;
$conf =~ s/\@bootRoot\@/$grubBoot->path/g;
# Emit submenus for all system profiles.
sub addProfile {