From 9674509e803564061f868f732d571f3ce0485756 Mon Sep 17 00:00:00 2001
From: "William A. Kennington III" <wak@google.com>
Date: Fri, 6 Aug 2021 00:06:42 -0700
Subject: meta-google: gbmc-ncsi-config: Add relay support for the bridge

We may have multiple BMCs running on the internal gbmcbr network via USB
links to attached trays. These BMCs do not have a direct connection to
the network, and require the NCSI BMC to relay all of their traffic
(including DHCP) out opf the machine. This patch enables dhcrelay to run
on the NCSI interface and proxy all DHCP traffic from the bridge out of
the machine.

Change-Id: I60f97ae2d64289c7b706b3d0a6c8fb79a931e485
Signed-off-by: William A. Kennington III <wak@google.com>
---
 .../recipes-google/ncsi/gbmc-ncsi-config.bb        | 26 ++++++++++++++++++++++
 1 file changed, 26 insertions(+)

(limited to 'meta-google/recipes-google/ncsi/gbmc-ncsi-config.bb')

diff --git a/meta-google/recipes-google/ncsi/gbmc-ncsi-config.bb b/meta-google/recipes-google/ncsi/gbmc-ncsi-config.bb
index 6480be1da..0302ed836 100644
--- a/meta-google/recipes-google/ncsi/gbmc-ncsi-config.bb
+++ b/meta-google/recipes-google/ncsi/gbmc-ncsi-config.bb
@@ -6,7 +6,12 @@ LIC_FILES_CHKSUM = "file://${COREBASE}/meta/files/common-licenses/Apache-2.0;md5
 inherit systemd
 
 SRC_URI += " \
+  file://-bmc-gbmcbrncsidhcp.netdev \
+  file://-bmc-gbmcbrncsidhcp.network \
+  file://-bmc-gbmcncsidhcp.netdev \
+  file://-bmc-gbmcncsidhcp.network \
   file://50-gbmc-ncsi.rules.in \
+  file://gbmc-ncsi-dhcrelay.service.in \
   file://gbmc-ncsi-sslh.socket.in \
   file://gbmc-ncsi-sslh.service \
   file://gbmc-ncsi-nft.sh.in \
@@ -17,6 +22,7 @@ SRC_URI += " \
 S = "${WORKDIR}"
 
 RDEPENDS:${PN} += " \
+  dhcp-relay \
   gbmc-ip-monitor \
   ncsid \
   nftables-systemd \
@@ -29,6 +35,7 @@ FILES:${PN} += " \
   "
 
 SYSTEMD_SERVICE:${PN} += " \
+  gbmc-ncsi-dhcrelay.service \
   gbmc-ncsi-sslh.service \
   gbmc-ncsi-sslh.socket \
   gbmc-ncsi-set-nicenabled.service \
@@ -47,6 +54,16 @@ do_install:append() {
   echo "net.ipv6.conf.$if_name.dad_transmits=0" \
     >>${D}${sysconfdir}/sysctl.d/25-gbmc-ncsi.conf
 
+  install -d -m0755 ${D}${systemd_unitdir}/network
+  install -m0644 ${WORKDIR}/-bmc-gbmcbrncsidhcp.netdev \
+    ${D}${systemd_unitdir}/network/
+  install -m0644 ${WORKDIR}/-bmc-gbmcbrncsidhcp.network \
+    ${D}${systemd_unitdir}/network/
+  install -m0644 ${WORKDIR}/-bmc-gbmcncsidhcp.netdev \
+    ${D}${systemd_unitdir}/network/
+  install -m0644 ${WORKDIR}/-bmc-gbmcncsidhcp.network \
+    ${D}${systemd_unitdir}/network/
+
   netdir=${D}${systemd_unitdir}/network/00-bmc-$if_name.network.d
   install -d -m0755 "$netdir"
   echo '[Network]' >>"$netdir"/gbmc-ncsi.conf
@@ -80,4 +97,13 @@ do_install:append() {
 
   sed "s,@NCSI_IF@,$if_name,g" ${WORKDIR}/gbmc-ncsi-set-nicenabled.service.in \
     >${D}${systemd_system_unitdir}/gbmc-ncsi-set-nicenabled.service
+
+  sed "s,@NCSI_IF@,$if_name,g" ${WORKDIR}/gbmc-ncsi-dhcrelay.service.in \
+    >${D}${systemd_system_unitdir}/gbmc-ncsi-dhcrelay.service
+}
+
+do_rm_work:prepend() {
+  # HACK: Work around broken do_rm_work not properly calling rm with `--`
+  # It doesn't like filenames that start with `-`
+  rm -rf -- ${WORKDIR}/-*
 }
-- 
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