448 lines
15 KiB
Nix
448 lines
15 KiB
Nix
{ config, lib, pkgs, ... }:
|
|
|
|
with lib;
|
|
|
|
let
|
|
|
|
udev = config.systemd.package;
|
|
|
|
cfg = config.services.udev;
|
|
|
|
initrdUdevRules = pkgs.runCommand "initrd-udev-rules" {} ''
|
|
mkdir -p $out/etc/udev/rules.d
|
|
for f in 60-cdrom_id 60-persistent-storage 75-net-description 80-drivers 80-net-setup-link; do
|
|
ln -s ${config.boot.initrd.systemd.package}/lib/udev/rules.d/$f.rules $out/etc/udev/rules.d
|
|
done
|
|
'';
|
|
|
|
|
|
extraUdevRules = pkgs.writeTextFile {
|
|
name = "extra-udev-rules";
|
|
text = cfg.extraRules;
|
|
destination = "/etc/udev/rules.d/99-local.rules";
|
|
};
|
|
|
|
extraHwdbFile = pkgs.writeTextFile {
|
|
name = "extra-hwdb-file";
|
|
text = cfg.extraHwdb;
|
|
destination = "/etc/udev/hwdb.d/99-local.hwdb";
|
|
};
|
|
|
|
nixosRules = ''
|
|
# Needed for gpm.
|
|
SUBSYSTEM=="input", KERNEL=="mice", TAG+="systemd"
|
|
'';
|
|
|
|
nixosInitrdRules = ''
|
|
# Mark dm devices as db_persist so that they are kept active after switching root
|
|
SUBSYSTEM=="block", KERNEL=="dm-[0-9]*", ACTION=="add|change", OPTIONS+="db_persist"
|
|
'';
|
|
|
|
# Perform substitutions in all udev rules files.
|
|
udevRulesFor = { name, udevPackages, udevPath, udev, systemd, binPackages, initrdBin ? null }: pkgs.runCommand name
|
|
{ preferLocalBuild = true;
|
|
allowSubstitutes = false;
|
|
packages = unique (map toString udevPackages);
|
|
}
|
|
''
|
|
mkdir -p $out
|
|
shopt -s nullglob
|
|
set +o pipefail
|
|
|
|
# Set a reasonable $PATH for programs called by udev rules.
|
|
echo 'ENV{PATH}="${udevPath}/bin:${udevPath}/sbin"' > $out/00-path.rules
|
|
|
|
# Add the udev rules from other packages.
|
|
for i in $packages; do
|
|
echo "Adding rules for package $i"
|
|
for j in $i/{etc,lib}/udev/rules.d/*; do
|
|
echo "Copying $j to $out/$(basename $j)"
|
|
cat $j > $out/$(basename $j)
|
|
done
|
|
done
|
|
|
|
# Fix some paths in the standard udev rules. Hacky.
|
|
for i in $out/*.rules; do
|
|
substituteInPlace $i \
|
|
--replace \"/sbin/modprobe \"${pkgs.kmod}/bin/modprobe \
|
|
--replace \"/sbin/mdadm \"${pkgs.mdadm}/sbin/mdadm \
|
|
--replace \"/sbin/blkid \"${pkgs.util-linux}/sbin/blkid \
|
|
--replace \"/bin/mount \"${pkgs.util-linux}/bin/mount \
|
|
--replace /usr/bin/readlink ${pkgs.coreutils}/bin/readlink \
|
|
--replace /usr/bin/basename ${pkgs.coreutils}/bin/basename 2>/dev/null
|
|
${optionalString (initrdBin != null) ''
|
|
substituteInPlace $i --replace '/run/current-system/systemd' "${removeSuffix "/bin" initrdBin}"
|
|
''}
|
|
done
|
|
|
|
echo -n "Checking that all programs called by relative paths in udev rules exist in ${udev}/lib/udev... "
|
|
import_progs=$(grep 'IMPORT{program}="[^/$]' $out/* |
|
|
sed -e 's/.*IMPORT{program}="\([^ "]*\)[ "].*/\1/' | uniq)
|
|
run_progs=$(grep -v '^[[:space:]]*#' $out/* | grep 'RUN+="[^/$]' |
|
|
sed -e 's/.*RUN+="\([^ "]*\)[ "].*/\1/' | uniq)
|
|
for i in $import_progs $run_progs; do
|
|
if [[ ! -x ${udev}/lib/udev/$i && ! $i =~ socket:.* ]]; then
|
|
echo "FAIL"
|
|
echo "$i is called in udev rules but not installed by udev"
|
|
exit 1
|
|
fi
|
|
done
|
|
echo "OK"
|
|
|
|
echo -n "Checking that all programs called by absolute paths in udev rules exist... "
|
|
import_progs=$(grep 'IMPORT{program}="/' $out/* |
|
|
sed -e 's/.*IMPORT{program}="\([^ "]*\)[ "].*/\1/' | uniq)
|
|
run_progs=$(grep -v '^[[:space:]]*#' $out/* | grep 'RUN+="/' |
|
|
sed -e 's/.*RUN+="\([^ "]*\)[ "].*/\1/' | uniq)
|
|
for i in $import_progs $run_progs; do
|
|
# if the path refers to /run/current-system/systemd, replace with config.systemd.package
|
|
if [[ $i == /run/current-system/systemd* ]]; then
|
|
i="${systemd}/''${i#/run/current-system/systemd/}"
|
|
fi
|
|
|
|
if [[ ! -x $i ]]; then
|
|
echo "FAIL"
|
|
echo "$i is called in udev rules but is not executable or does not exist"
|
|
exit 1
|
|
fi
|
|
done
|
|
echo "OK"
|
|
|
|
filesToFixup="$(for i in "$out"/*; do
|
|
# list all files referring to (/usr)/bin paths, but allow references to /bin/sh.
|
|
grep -P -l '\B(?!\/bin\/sh\b)(\/usr)?\/bin(?:\/.*)?' "$i" || :
|
|
done)"
|
|
|
|
if [ -n "$filesToFixup" ]; then
|
|
echo "Consider fixing the following udev rules:"
|
|
echo "$filesToFixup" | while read localFile; do
|
|
remoteFile="origin unknown"
|
|
for i in ${toString binPackages}; do
|
|
for j in "$i"/*/udev/rules.d/*; do
|
|
[ -e "$out/$(basename "$j")" ] || continue
|
|
[ "$(basename "$j")" = "$(basename "$localFile")" ] || continue
|
|
remoteFile="originally from $j"
|
|
break 2
|
|
done
|
|
done
|
|
refs="$(
|
|
grep -o '\B\(/usr\)\?/s\?bin/[^ "]\+' "$localFile" \
|
|
| sed -e ':r;N;''${s/\n/ and /;br};s/\n/, /g;br'
|
|
)"
|
|
echo "$localFile ($remoteFile) contains references to $refs."
|
|
done
|
|
exit 1
|
|
fi
|
|
|
|
# If auto-configuration is disabled, then remove
|
|
# udev's 80-drivers.rules file, which contains rules for
|
|
# automatically calling modprobe.
|
|
${optionalString (!config.boot.hardwareScan) ''
|
|
ln -s /dev/null $out/80-drivers.rules
|
|
''}
|
|
'';
|
|
|
|
hwdbBin = pkgs.runCommand "hwdb.bin"
|
|
{ preferLocalBuild = true;
|
|
allowSubstitutes = false;
|
|
packages = unique (map toString ([udev] ++ cfg.packages));
|
|
}
|
|
''
|
|
mkdir -p etc/udev/hwdb.d
|
|
for i in $packages; do
|
|
echo "Adding hwdb files for package $i"
|
|
for j in $i/{etc,lib}/udev/hwdb.d/*; do
|
|
ln -s $j etc/udev/hwdb.d/$(basename $j)
|
|
done
|
|
done
|
|
|
|
echo "Generating hwdb database..."
|
|
# hwdb --update doesn't return error code even on errors!
|
|
res="$(${pkgs.buildPackages.systemd}/bin/systemd-hwdb --root=$(pwd) update 2>&1)"
|
|
echo "$res"
|
|
[ -z "$(echo "$res" | egrep '^Error')" ]
|
|
mv etc/udev/hwdb.bin $out
|
|
'';
|
|
|
|
compressFirmware = firmware:
|
|
let
|
|
inherit (config.boot.kernelPackages) kernelAtLeast;
|
|
in
|
|
if ! (firmware.compressFirmware or true) then
|
|
firmware
|
|
else
|
|
if kernelAtLeast "5.19" then pkgs.compressFirmwareZstd firmware
|
|
else if kernelAtLeast "5.3" then pkgs.compressFirmwareXz firmware
|
|
else firmware;
|
|
|
|
# Udev has a 512-character limit for ENV{PATH}, so create a symlink
|
|
# tree to work around this.
|
|
udevPath = pkgs.buildEnv {
|
|
name = "udev-path";
|
|
paths = cfg.path;
|
|
pathsToLink = [ "/bin" "/sbin" ];
|
|
ignoreCollisions = true;
|
|
};
|
|
|
|
in
|
|
|
|
{
|
|
|
|
###### interface
|
|
|
|
options = {
|
|
boot.hardwareScan = mkOption {
|
|
type = types.bool;
|
|
default = true;
|
|
description = ''
|
|
Whether to try to load kernel modules for all detected hardware.
|
|
Usually this does a good job of providing you with the modules
|
|
you need, but sometimes it can crash the system or cause other
|
|
nasty effects.
|
|
'';
|
|
};
|
|
|
|
services.udev = {
|
|
enable = mkEnableOption "udev, a device manager for the Linux kernel" // {
|
|
default = true;
|
|
};
|
|
|
|
packages = mkOption {
|
|
type = types.listOf types.path;
|
|
default = [];
|
|
description = ''
|
|
List of packages containing {command}`udev` rules.
|
|
All files found in
|
|
{file}`«pkg»/etc/udev/rules.d` and
|
|
{file}`«pkg»/lib/udev/rules.d`
|
|
will be included.
|
|
'';
|
|
apply = map getBin;
|
|
};
|
|
|
|
path = mkOption {
|
|
type = types.listOf types.path;
|
|
default = [];
|
|
description = ''
|
|
Packages added to the {env}`PATH` environment variable when
|
|
executing programs from Udev rules.
|
|
|
|
coreutils, gnu{sed,grep}, util-linux and config.systemd.package are
|
|
automatically included.
|
|
'';
|
|
};
|
|
|
|
extraRules = mkOption {
|
|
default = "";
|
|
example = ''
|
|
ENV{ID_VENDOR_ID}=="046d", ENV{ID_MODEL_ID}=="0825", ENV{PULSE_IGNORE}="1"
|
|
'';
|
|
type = types.lines;
|
|
description = ''
|
|
Additional {command}`udev` rules. They'll be written
|
|
into file {file}`99-local.rules`. Thus they are
|
|
read and applied after all other rules.
|
|
'';
|
|
};
|
|
|
|
extraHwdb = mkOption {
|
|
default = "";
|
|
example = ''
|
|
evdev:input:b0003v05AFp8277*
|
|
KEYBOARD_KEY_70039=leftalt
|
|
KEYBOARD_KEY_700e2=leftctrl
|
|
'';
|
|
type = types.lines;
|
|
description = ''
|
|
Additional {command}`hwdb` files. They'll be written
|
|
into file {file}`99-local.hwdb`. Thus they are
|
|
read after all other files.
|
|
'';
|
|
};
|
|
|
|
};
|
|
|
|
hardware.firmware = mkOption {
|
|
type = types.listOf types.package;
|
|
default = [];
|
|
description = ''
|
|
List of packages containing firmware files. Such files
|
|
will be loaded automatically if the kernel asks for them
|
|
(i.e., when it has detected specific hardware that requires
|
|
firmware to function). If multiple packages contain firmware
|
|
files with the same name, the first package in the list takes
|
|
precedence. Note that you must rebuild your system if you add
|
|
files to any of these directories.
|
|
'';
|
|
apply = list: pkgs.buildEnv {
|
|
name = "firmware";
|
|
paths = map compressFirmware list;
|
|
pathsToLink = [ "/lib/firmware" ];
|
|
ignoreCollisions = true;
|
|
};
|
|
};
|
|
|
|
networking.usePredictableInterfaceNames = mkOption {
|
|
default = true;
|
|
type = types.bool;
|
|
description = ''
|
|
Whether to assign [predictable names to network interfaces](https://www.freedesktop.org/wiki/Software/systemd/PredictableNetworkInterfaceNames/).
|
|
If enabled, interfaces
|
|
are assigned names that contain topology information
|
|
(e.g. `wlp3s0`) and thus should be stable
|
|
across reboots. If disabled, names depend on the order in
|
|
which interfaces are discovered by the kernel, which may
|
|
change randomly across reboots; for instance, you may find
|
|
`eth0` and `eth1` flipping
|
|
unpredictably.
|
|
'';
|
|
};
|
|
|
|
boot.initrd.services.udev = {
|
|
|
|
packages = mkOption {
|
|
type = types.listOf types.path;
|
|
default = [];
|
|
description = ''
|
|
*This will only be used when systemd is used in stage 1.*
|
|
|
|
List of packages containing {command}`udev` rules that will be copied to stage 1.
|
|
All files found in
|
|
{file}`«pkg»/etc/udev/rules.d` and
|
|
{file}`«pkg»/lib/udev/rules.d`
|
|
will be included.
|
|
'';
|
|
};
|
|
|
|
binPackages = mkOption {
|
|
type = types.listOf types.path;
|
|
default = [];
|
|
description = ''
|
|
*This will only be used when systemd is used in stage 1.*
|
|
|
|
Packages to search for binaries that are referenced by the udev rules in stage 1.
|
|
This list always contains /bin of the initrd.
|
|
'';
|
|
apply = map getBin;
|
|
};
|
|
|
|
rules = mkOption {
|
|
default = "";
|
|
example = ''
|
|
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:1D:60:B9:6D:4F", KERNEL=="eth*", NAME="my_fast_network_card"
|
|
'';
|
|
type = types.lines;
|
|
description = ''
|
|
{command}`udev` rules to include in the initrd
|
|
*only*. They'll be written into file
|
|
{file}`99-local.rules`. Thus they are read and applied
|
|
after the essential initrd rules.
|
|
'';
|
|
};
|
|
|
|
};
|
|
|
|
};
|
|
|
|
|
|
###### implementation
|
|
|
|
config = mkIf cfg.enable {
|
|
|
|
services.udev.extraRules = nixosRules;
|
|
|
|
services.udev.packages = [ extraUdevRules extraHwdbFile ];
|
|
|
|
services.udev.path = [ pkgs.coreutils pkgs.gnused pkgs.gnugrep pkgs.util-linux udev ];
|
|
|
|
boot.kernelParams = mkIf (!config.networking.usePredictableInterfaceNames) [ "net.ifnames=0" ];
|
|
|
|
boot.initrd.extraUdevRulesCommands = mkIf (!config.boot.initrd.systemd.enable && config.boot.initrd.services.udev.rules != "")
|
|
''
|
|
cat <<'EOF' > $out/99-local.rules
|
|
${config.boot.initrd.services.udev.rules}
|
|
EOF
|
|
'';
|
|
|
|
boot.initrd.services.udev.rules = nixosInitrdRules;
|
|
|
|
boot.initrd.systemd.additionalUpstreamUnits = [
|
|
"initrd-udevadm-cleanup-db.service"
|
|
"systemd-udevd-control.socket"
|
|
"systemd-udevd-kernel.socket"
|
|
"systemd-udevd.service"
|
|
"systemd-udev-settle.service"
|
|
"systemd-udev-trigger.service"
|
|
];
|
|
boot.initrd.systemd.storePaths = [
|
|
"${config.boot.initrd.systemd.package}/lib/systemd/systemd-udevd"
|
|
"${config.boot.initrd.systemd.package}/lib/udev/ata_id"
|
|
"${config.boot.initrd.systemd.package}/lib/udev/cdrom_id"
|
|
"${config.boot.initrd.systemd.package}/lib/udev/scsi_id"
|
|
"${config.boot.initrd.systemd.package}/lib/udev/rules.d"
|
|
] ++ map (x: "${x}/bin") config.boot.initrd.services.udev.binPackages;
|
|
|
|
# Generate the udev rules for the initrd
|
|
boot.initrd.systemd.contents = {
|
|
"/etc/udev/rules.d".source = udevRulesFor {
|
|
name = "initrd-udev-rules";
|
|
initrdBin = config.boot.initrd.systemd.contents."/bin".source;
|
|
udevPackages = config.boot.initrd.services.udev.packages;
|
|
udevPath = config.boot.initrd.systemd.contents."/bin".source;
|
|
udev = config.boot.initrd.systemd.package;
|
|
systemd = config.boot.initrd.systemd.package;
|
|
binPackages = config.boot.initrd.services.udev.binPackages ++ [ config.boot.initrd.systemd.contents."/bin".source ];
|
|
};
|
|
};
|
|
# Insert initrd rules
|
|
boot.initrd.services.udev.packages = [
|
|
initrdUdevRules
|
|
(mkIf (config.boot.initrd.services.udev.rules != "") (pkgs.writeTextFile {
|
|
name = "initrd-udev-rules";
|
|
destination = "/etc/udev/rules.d/99-local.rules";
|
|
text = config.boot.initrd.services.udev.rules;
|
|
}))
|
|
];
|
|
|
|
environment.etc = {
|
|
"udev/rules.d".source = udevRulesFor {
|
|
name = "udev-rules";
|
|
udevPackages = cfg.packages;
|
|
systemd = config.systemd.package;
|
|
binPackages = cfg.packages;
|
|
inherit udevPath udev;
|
|
};
|
|
"udev/hwdb.bin".source = hwdbBin;
|
|
} // lib.optionalAttrs config.boot.modprobeConfig.enable {
|
|
# We don't place this into `extraModprobeConfig` so that stage-1 ramdisk doesn't bloat.
|
|
"modprobe.d/firmware.conf".text = "options firmware_class path=${config.hardware.firmware}/lib/firmware";
|
|
};
|
|
|
|
system.requiredKernelConfig = with config.lib.kernelConfig; [
|
|
(isEnabled "UNIX")
|
|
(isYes "INOTIFY_USER")
|
|
(isYes "NET")
|
|
];
|
|
|
|
system.activationScripts.udevd = lib.mkIf config.boot.kernel.enable ''
|
|
# The deprecated hotplug uevent helper is not used anymore
|
|
if [ -e /proc/sys/kernel/hotplug ]; then
|
|
echo "" > /proc/sys/kernel/hotplug
|
|
fi
|
|
|
|
# Allow the kernel to find our firmware.
|
|
if [ -e /sys/module/firmware_class/parameters/path ]; then
|
|
echo -n "${config.hardware.firmware}/lib/firmware" > /sys/module/firmware_class/parameters/path
|
|
fi
|
|
'';
|
|
|
|
systemd.services.systemd-udevd =
|
|
{ restartTriggers = cfg.packages;
|
|
};
|
|
|
|
};
|
|
|
|
imports = [
|
|
(mkRenamedOptionModule [ "services" "udev" "initrdRules" ] [ "boot" "initrd" "services" "udev" "rules" ])
|
|
];
|
|
}
|