[init/kexec/] More advanced network setup via KCL, could skip DHCP

If enough information if provided via KCL, we can skip the initial DHCP
request in stage 3.1. Currently we require IP address, subnet mask and
DNS server to skip DHCP. If we extend the boot server to supply a
fallback/default DNS server, we could even do without DNS which would
work in almost all cases.

kexec-reboot has been extended to make use of this feature, but can be
extended even more to provide up to date values from the current system
configuration. Currently, some of the values it provides to the new
kernel will be cached values from stage 3.1.
kexec-reboot also honors the ipxe menu id from the KCL if given, to
properly download the matching menu entry, which will take updates to
the entry into account (e.g. changed URLs to kernel/init).

1 files changed, 4 insertions, 4 deletions

diff --git a/core/rootfs/rootfs-stage31/data/inc/activate_sysconfig b/core/rootfs/rootfs-stage31/data/inc/activate_sysconfig
index 45f3832e..2d6015e1 100644
--- a/core/rootfs/rootfs-stage31/data/inc/activate_sysconfig
+++ b/core/rootfs/rootfs-stage31/data/inc/activate_sysconfig
@@ -42,11 +42,11 @@ merge_text_config() {
 	# write IP and SLX_SERVER configuration to $CONFIG
 cat >> "$CONFIG" <<HEREEND
 # IP Config written in stage31
-SLX_PXE_CLIENT_IP='$CLIENTIP'
+SLX_PXE_CLIENT_IP='$ip'
 SLX_PXE_SERVER_IP='$SERVERIP'
-SLX_PXE_GATEWAY='$GATEWAY'
-SLX_PXE_DNS='$DNS_SERVER'
-SLX_PXE_MAC='$BRIDGEMAC'
+SLX_PXE_GATEWAY='$router'
+SLX_PXE_DNS='$dns'
+SLX_PXE_MAC='$MAC'
 HEREEND
 	return 0
 }