blob: 2a7417ed37153f2bb149e4eb3a042ed5444c31ae (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
|
{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.boot.initrd.network;
dhcpInterfaces = lib.attrNames (lib.filterAttrs (iface: v: v.useDHCP == true) (config.networking.interfaces or {}));
doDhcp = config.networking.useDHCP || dhcpInterfaces != [];
dhcpIfShellExpr = if config.networking.useDHCP
then "$(ls /sys/class/net/ | grep -v ^lo$)"
else lib.concatMapStringsSep " " lib.escapeShellArg dhcpInterfaces;
udhcpcScript = pkgs.writeScript "udhcp-script"
''
#! /bin/sh
if [ "$1" = bound ]; then
ip address add "$ip/$mask" dev "$interface"
if [ -n "$mtu" ]; then
ip link set mtu "$mtu" dev "$interface"
fi
if [ -n "$staticroutes" ]; then
echo "$staticroutes" \
| sed -r "s@(\S+) (\S+)@ ip route add \"\1\" via \"\2\" dev \"$interface\" ; @g" \
| sed -r "s@ via \"0\.0\.0\.0\"@@g" \
| /bin/sh
fi
if [ -n "$router" ]; then
ip route add "$router" dev "$interface" # just in case if "$router" is not within "$ip/$mask" (e.g. Hetzner Cloud)
ip route add default via "$router" dev "$interface"
fi
if [ -n "$dns" ]; then
rm -f /etc/resolv.conf
for server in $dns; do
echo "nameserver $server" >> /etc/resolv.conf
done
fi
fi
'';
udhcpcArgs = toString cfg.udhcpc.extraArgs;
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.
You should add the module(s) required for your network card to
boot.initrd.availableKernelModules.
<literal>lspci -v | grep -iA8 'network\|ethernet'</literal>
will tell you which.
'';
};
boot.initrd.network.flushBeforeStage2 = mkOption {
type = types.bool;
default = true;
description = ''
Whether to clear the configuration of the interfaces that were set up in
the initrd right before stage 2 takes over. Stage 2 will do the regular network
configuration based on the NixOS networking options.
'';
};
boot.initrd.network.udhcpc.extraArgs = mkOption {
default = [];
type = types.listOf types.str;
description = ''
Additional command-line arguments passed verbatim to udhcpc if
<option>boot.initrd.network.enable</option> and <option>networking.useDHCP</option>
are enabled.
'';
};
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.klibc}/lib/klibc/bin.static/ipconfig
'';
boot.initrd.preLVMCommands = mkBefore (
# Search for interface definitions in command line.
''
ifaces=""
for o in $(cat /proc/cmdline); do
case $o in
ip=*)
ipconfig $o && ifaces="$ifaces $(echo $o | cut -d: -f6)"
;;
esac
done
''
# Otherwise, use DHCP.
+ optionalString doDhcp ''
# Bring up all interfaces.
for iface in ${dhcpIfShellExpr}; do
echo "bringing up network interface $iface..."
ip link set "$iface" up && ifaces="$ifaces $iface"
done
# Acquire DHCP leases.
for iface in ${dhcpIfShellExpr}; do
echo "acquiring IP address via DHCP on $iface..."
udhcpc --quit --now -i $iface -O staticroutes --script ${udhcpcScript} ${udhcpcArgs}
done
''
+ cfg.postCommands);
boot.initrd.postMountCommands = mkIf cfg.flushBeforeStage2 ''
for iface in $ifaces; do
ip address flush "$iface"
ip link set "$iface" down
done
'';
};
}
|