From 4d0706944856cd5aaeb75722bddfae17e148c67e Mon Sep 17 00:00:00 2001
From: Arturo Buzarra <arturo.buzarra@digi.com>
Date: Thu, 17 Nov 2022 11:40:28 +0100
Subject: [PATCH] mount_digiparts.sh: add support to dualboot volumes on
 read-only mode

This commit allows to mount only the linux partition active in read-only mode.

https://onedigi.atlassian.net/browse/DEL-8193

Signed-off-by: Arturo Buzarra <arturo.buzarra@digi.com>
---
 .../udev/udev-extraconf/mount_digiparts.sh      | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/meta-digi-arm/recipes-core/udev/udev-extraconf/mount_digiparts.sh b/meta-digi-arm/recipes-core/udev/udev-extraconf/mount_digiparts.sh
index 2b34c50bc..11387a9c3 100644
--- a/meta-digi-arm/recipes-core/udev/udev-extraconf/mount_digiparts.sh
+++ b/meta-digi-arm/recipes-core/udev/udev-extraconf/mount_digiparts.sh
@@ -26,12 +26,25 @@ elif [ "${SUBSYSTEM}" = "ubi" ]; then
 	PARTNAME="$(cat /sys/${DEVPATH}/name)"
 fi
 
+MOUNT_FOLDER=${PARTNAME}
 MOUNT_PARAMS="-o silent"
 # Mount 'linux' partition as read-only
-if [ "${PARTNAME}" = "linux" ]; then
+if [ "${PARTNAME}" = "linux" ] || [ "${PARTNAME}" = "linux_a" ] || [ "${PARTNAME}" = "linux_b" ]; then
+	MOUNT_FOLDER="linux"
 	MOUNT_PARAMS="${MOUNT_PARAMS} -o ro"
 fi
 
+DUALBOOT_MODE="$(fw_printenv -n dualboot 2>/dev/null)"
+if [ "${DUALBOOT_MODE}" = "yes" ]; then
+	if [ "${PARTNAME}" = "linux_a" ] || [ "${PARTNAME}" = "linux_b" ]; then
+		ACTIVE_SYSTEM="$(fw_printenv -n active_system 2>/dev/null)"
+		if [ "${ACTIVE_SYSTEM}" != "${PARTNAME}" ]; then
+			logger "Skip mount partition '${PARTNAME}', because it is not the active system"
+			exit 0
+		fi
+	fi
+fi
+
 if [ "x$BASE_INIT" = "x$INIT_SYSTEMD" ];then
 	# systemd as init uses systemd-mount to mount block devices
 	MOUNT="/usr/bin/systemd-mount"
@@ -57,7 +70,7 @@ else
 fi
 
 # Create mount point if needed
-MOUNTPOINT="/mnt/${PARTNAME}"
+MOUNTPOINT="/mnt/${MOUNT_FOLDER}"
 [ -d "${MOUNTPOINT}" ] || mkdir -p ${MOUNTPOINT}
 
 if [ "${SUBSYSTEM}" = "block" ]; then