meta-google: gbmc-ncsi-config: Add public address to gbmc-bridge
This dynamically detects addresses applied to the NC-SI interface and
infers the addreses which should be used explicitly by BMCs.
Change-Id: I9036be0a54936aace580746cd1900ee653f43cfd
Signed-off-by: William A. Kennington III <wak@google.com>
diff --git a/meta-google/recipes-google/ncsi/files/gbmc-ncsi-br-pub-addr.sh.in b/meta-google/recipes-google/ncsi/files/gbmc-ncsi-br-pub-addr.sh.in
new file mode 100644
index 0000000..f51b033
--- /dev/null
+++ b/meta-google/recipes-google/ncsi/files/gbmc-ncsi-br-pub-addr.sh.in
@@ -0,0 +1,107 @@
+# 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 "${gbmc_ncsi_br_pub_addr_lib-}" ] || return
+
+gbmc_ncsi_br_pub_addr_init=
+gbmc_ncsi_br_pub_addr_lastip=
+
+gbmc_ncsi_br_pub_addr_update() {
+ [ -n "$gbmc_ncsi_br_pub_addr_init" ] || return
+
+ printf 'gBMC Bridge Pub Addr from NCSI: %s\n' \
+ "${gbmc_ncsi_br_pub_addr_lastip:-(deleted)}" >&2
+
+ local pfx=
+ if [ -n "$gbmc_ncsi_br_pub_addr_lastip" ]; then
+ # Pad the address out to a /64 and ensure that it doesn't have extra bits
+ pfx="${gbmc_ncsi_br_pub_addr_lastip%::}"
+ while true; do
+ # Count `:` in `pfx` by removing them and diffing their lengths
+ local nos="${pfx//:/}"
+ (( ${#pfx} - ${#nos} >= 3 )) && break
+ pfx+=":0"
+ done
+ # Addresses that have more than 64bits of prefix (more than 3 separators)
+ # do not work with this scheme. Ignore them.
+ (( ${#pfx} - ${#nos} == 3 )) || pfx=
+ fi
+
+ local contents='[Network]'$'\n'
+ if [ -n "$pfx" ]; then
+ local here=
+ read -r -d '' here <<EOF
+Address=${pfx}:fd01::/128
+IPv6PrefixDelegation=yes
+[IPv6PrefixDelegation]
+RouterLifetimeSec=60
+[IPv6Prefix]
+Prefix=${pfx}:fd00::/80
+PreferredLifetimeSec=60
+ValidLifetimeSec=60
+[IPv6RoutePrefix]
+Route=${pfx}:fd01::/80
+LifetimeSec=60
+EOF
+ contents+="$here"$'\n'
+ fi
+
+ local file
+ for file in /run/systemd/network/{00,}-bmc-gbmcbr.network.d/50-public.conf; do
+ mkdir -p -m 755 "$(dirname "$file")"
+ printf '%s' "$contents" >"$file"
+ done
+
+ # We only restart networkd if we know we have a management network available
+ # on the machine and networkd is already running.
+ if [ -e /lib/systemd/network/-bmc-gbmcbrdummy.network ] && \
+ ! systemctl status systemd-networkd | grep -q inactive; then
+ echo "Restarting networkd" >&2
+ # HACK: We can't restart systemd-networkd without coordinating with
+ # phosphor-networkd, otherwise it will sometimes detect interfaces as
+ # unmanaged because it reads administrative state to determine enabled
+ # status. Adding an IP to phosphor-networkd is guaranteed to trigger the
+ # restart we want, and systemd-network will never actually accept the
+ # new value.
+ local start=$SECONDS
+ while (( SECONDS - start < 30 )); do
+ busctl call xyz.openbmc_project.Network \
+ /xyz/openbmc_project/network/gbmcbrdummy \
+ xyz.openbmc_project.Network.IP.Create IP ssys \
+ xyz.openbmc_project.Network.IP.Protocol.IPv6 ff02::1 128 '' && break
+ sleep 1
+ done
+ fi
+}
+
+gbmc_ncsi_br_pub_addr_hook() {
+ if [ "$change" = 'init' ]; then
+ gbmc_ncsi_br_pub_addr_init=1
+ gbmc_ncsi_br_pub_addr_update
+ elif [ "$change" = 'addr' -a "$intf" = '@NCSI_IF@' ] &&
+ [ "$scope" = 'global' -a "$fam" = 'inet6' ]; then
+ if [ "$action" = 'add' -a "$ip" != "$gbmc_ncsi_br_pub_addr_lastip" ]; then
+ gbmc_ncsi_br_pub_addr_lastip="$ip"
+ gbmc_ncsi_br_pub_addr_update
+ fi
+ if [ "$action" = 'del' -a "$ip" = "$gbmc_ncsi_br_pub_addr_lastip" ]; then
+ gbmc_ncsi_br_pub_addr_lastip=
+ gbmc_ncsi_br_pub_addr_update
+ fi
+ fi
+}
+
+GBMC_IP_MONITOR_HOOKS+=(gbmc_ncsi_br_pub_addr_hook)
+
+gbmc_ncsi_br_pub_addr_lib=1