meta-google: gbmc-bridge: Discover ULA addresses at runtime
If the bridge interface is assigned a MAC at runtime then it needs to
add the appropriate ULA address for that MAC.
Change-Id: Ia109c36320a78bb02ba9b54038ca23b0d3e2c948
Signed-off-by: William A. Kennington III <wak@google.com>
diff --git a/meta-google/recipes-google/networking/gbmc-bridge.bb b/meta-google/recipes-google/networking/gbmc-bridge.bb
index 1358ac5..202522a 100644
--- a/meta-google/recipes-google/networking/gbmc-bridge.bb
+++ b/meta-google/recipes-google/networking/gbmc-bridge.bb
@@ -14,16 +14,20 @@
file://+-bmc-gbmcbrusb.network \
file://ipmi.service.in \
file://50-gbmc-br.rules \
+ file://gbmc-br-ula.sh \
"
FILES_${PN}_append = " \
+ ${datadir}/gbmc-ip-monitor \
${systemd_unitdir}/network \
${sysconfdir}/nftables \
${sysconfdir}/avahi/services \
"
RDEPENDS_${PN}_append = " \
+ gbmc-ip-monitor \
mstpd-mstpd \
+ network-sh \
"
GBMC_BR_MAC_ADDR ?= ""
@@ -72,4 +76,8 @@
sed -i 's,@EXTRA_ATTRS@,,g' ${WORKDIR}/ipmi.service.in
sed 's,@NAME@,bmc,g' ${WORKDIR}/ipmi.service.in >${avahi_dir}/bmc.ipmi.service
sed 's,@NAME@,${MACHINE}-bmc,g' ${WORKDIR}/ipmi.service.in >${avahi_dir}/${MACHINE}-bmc.ipmi.service
+
+ mondir=${D}${datadir}/gbmc-ip-monitor
+ install -d -m0755 "$mondir"
+ install -m0644 ${WORKDIR}/gbmc-br-ula.sh "$mondir"/
}
diff --git a/meta-google/recipes-google/networking/gbmc-bridge/gbmc-br-ula.sh b/meta-google/recipes-google/networking/gbmc-bridge/gbmc-br-ula.sh
new file mode 100644
index 0000000..ac273a3
--- /dev/null
+++ b/meta-google/recipes-google/networking/gbmc-bridge/gbmc-br-ula.sh
@@ -0,0 +1,67 @@
+# Copyright 2021 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+[ -z "${gbmc_br_ula_lib-}" ] || return
+
+source /usr/share/network/lib.sh || exit
+
+gbmc_br_ula_init=
+gbmc_br_ula_mac=
+
+gbmc_br_ula_update() {
+ [ -n "$gbmc_br_ula_init" ] || return
+
+ echo "gBMC Bridge ULA MAC: ${gbmc_br_ula_mac:-(deleted)}" >&2
+
+ local addr=
+ contents='[Network]'$'\n'
+ if [ -n "$gbmc_br_ula_mac" ]; then
+ local eui64
+ eui64="$(mac_to_eui64 "$mac")" || return
+ addr="fdb5:0481:10ce:0:$eui64/64"
+ contents+="Address=$addr"$'\n'
+ fi
+
+ local netfile
+ for netfile in /run/systemd/network/{00,}-bmc-gbmcbr.network.d/60-ula.conf; do
+ mkdir -p -m 755 "$(dirname "$netfile")"
+ printf '%s' "$contents" >"$netfile"
+ done
+
+ # We have to add the address after writing the systemd config to ensure we
+ # don't race with reconfiguration and drop the address.
+ if [ -n "$addr" ]; then
+ ip addr replace "$addr" dev gbmcbr
+ fi
+}
+
+gbmc_br_ula_hook() {
+ if [ "$change" = 'init' ]; then
+ gbmc_br_ula_init=1
+ gbmc_br_ula_update
+ elif [ "$change" = 'link' -a "$intf" = 'gbmcbr' ]; then
+ if [ "$action" = 'add' -a "$mac" != "$gbmc_br_ula_mac" ]; then
+ gbmc_br_ula_mac="$mac"
+ gbmc_br_ula_update
+ fi
+ if [ "$action" = 'del' -a "$mac" = "$gbmc_br_ula_mac" ]; then
+ gbmc_br_ula_mac=
+ gbmc_br_ula_update
+ fi
+ fi
+}
+
+GBMC_IP_MONITOR_HOOKS+=(gbmc_br_ula_hook)
+
+gbmc_br_ula_lib=1