From d230e86a920ba1440e6299a60f0442ceb610d500 Mon Sep 17 00:00:00 2001
From: "William A. Kennington III" <wak@google.com>
Date: Mon, 9 May 2022 15:24:22 -0700
Subject: meta-google: gbmc-bridge: Add DHCP coalesced powercycle

This makes it possible to perform to coalesce multiple powercycles into
a single one.

Change-Id: I748219a037e38b617b8d662eff498fd3b37acbb6
Signed-off-by: William A. Kennington III <wak@google.com>
---
 .../recipes-google/networking/gbmc-bridge.bb       |  4 +++
 .../gbmc-bridge/50-gbmc-psu-hardreset.sh           | 37 ++++++++++++++++++++++
 2 files changed, 41 insertions(+)
 create mode 100644 meta-google/recipes-google/networking/gbmc-bridge/50-gbmc-psu-hardreset.sh

(limited to 'meta-google')

diff --git a/meta-google/recipes-google/networking/gbmc-bridge.bb b/meta-google/recipes-google/networking/gbmc-bridge.bb
index 57f78ea4ac..850b14a237 100644
--- a/meta-google/recipes-google/networking/gbmc-bridge.bb
+++ b/meta-google/recipes-google/networking/gbmc-bridge.bb
@@ -21,6 +21,7 @@ SRC_URI += " \
   file://gbmc-br-gw-src.sh \
   file://gbmc-br-nft.sh \
   file://gbmc-br-dhcp.sh \
+  file://50-gbmc-psu-hardreset.sh \
   file://gbmc-br-dhcp.service \
   file://gbmc-br-dhcp-term.sh \
   file://gbmc-br-dhcp-term.service \
@@ -28,6 +29,7 @@ SRC_URI += " \
 
 FILES:${PN}:append = " \
   ${datadir}/gbmc-ip-monitor \
+  ${datadir}/gbmc-br-dhcp \
   ${systemd_unitdir}/network \
   ${sysconfdir}/nftables \
   ${sysconfdir}/avahi/services \
@@ -109,6 +111,8 @@ do_install() {
   install -m0644 ${WORKDIR}/gbmc-br-ensure-ra.service ${D}${systemd_system_unitdir}/
   install -m0644 ${WORKDIR}/gbmc-br-dhcp.service ${D}${systemd_system_unitdir}/
   install -m0644 ${WORKDIR}/gbmc-br-dhcp-term.service ${D}${systemd_system_unitdir}/
+  install -d -m0755 ${D}${datadir}/gbmc-br-dhcp
+  install -m0644 ${WORKDIR}/50-gbmc-psu-hardreset.sh ${D}${datadir}/gbmc-br-dhcp/
 }
 
 do_rm_work:prepend() {
diff --git a/meta-google/recipes-google/networking/gbmc-bridge/50-gbmc-psu-hardreset.sh b/meta-google/recipes-google/networking/gbmc-bridge/50-gbmc-psu-hardreset.sh
new file mode 100644
index 0000000000..c0974a00d1
--- /dev/null
+++ b/meta-google/recipes-google/networking/gbmc-bridge/50-gbmc-psu-hardreset.sh
@@ -0,0 +1,37 @@
+#!/bin/bash
+# Copyright 2022 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.
+
+[ -n "${gbmc_psu_hardreset-}" ] && return
+
+gbmc_psu_hardreset_needed=
+
+gbmc_psu_hardreset_hook() {
+  # We don't always need a powercycle, allow skipping
+  if [ -z "${gbmc_psu_hardreset_needed-}" ]; then
+    echo "Skipping tray powercycle" >&2
+    return 0
+  fi
+
+  echo "Powercycling" >&2
+  systemctl start gbmc-psu-hardreset.target || return
+
+  # Ensure that we don't continue the DHCP process while waiting for the
+  # powercycle.
+  exit 0
+}
+
+GBMC_BR_DHCP_HOOKS+=(gbmc_psu_hardreset_hook)
+
+gbmc_psu_hardreset=1
-- 
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