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