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|
{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.boot.initrd.network;
udhcpcScript = pkgs.writeScript "udhcp-script"
''
#! /bin/sh
if [ "$1" = bound ]; then
ip address add "$ip/$mask" dev "$interface"
if [ -n "$router" ]; then
ip route add default via "$router" dev "$interface"
fi
if [ -n "$dns" ]; then
rm -f /etc/resolv.conf
for i in $dns; do
echo "nameserver $dns" >> /etc/resolv.conf
done
fi
fi
'';
in
{
options = {
boot.initrd.network.enable = mkOption {
type = types.bool;
default = false;
description = ''
Add network connectivity support to initrd. The network may be
configured using the <literal>ip</literal> kernel parameter,
as described in <link
xlink:href="https://www.kernel.org/doc/Documentation/filesystems/nfs/nfsroot.txt">the
kernel documentation</link>. Otherwise, if
<option>networking.useDHCP</option> is enabled, an IP address
is acquired using DHCP.
'';
};
boot.initrd.network.postCommands = mkOption {
default = "";
type = types.lines;
description = ''
Shell commands to be executed after stage 1 of the
boot has initialised the network.
'';
};
};
config = mkIf cfg.enable {
boot.initrd.kernelModules = [ "af_packet" ];
boot.initrd.extraUtilsCommands = ''
copy_bin_and_libs ${pkgs.mkinitcpio-nfs-utils}/bin/ipconfig
'';
boot.initrd.preLVMCommands =
# Search for interface definitions in command line.
''
for o in $(cat /proc/cmdline); do
case $o in
ip=*)
ipconfig $o && hasNetwork=1
;;
esac
done
''
# Otherwise, use DHCP.
+ optionalString config.networking.useDHCP ''
if [ -z "$hasNetwork" ]; then
# Bring up all interfaces.
for iface in $(cd /sys/class/net && ls); do
echo "bringing up network interface $iface..."
ip link set "$iface" up
done
# Acquire a DHCP lease.
echo "acquiring IP address via DHCP..."
udhcpc --quit --now --script ${udhcpcScript}
fi
''
+ cfg.postCommands;
};
}
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