board/common: introduce image test-mode

To support testing, the test-config.cfg file has been introduced in Infix.
Additionally, a "test mode" for the running image is required for this
configuration to be applied.

Basically the test-config will only be loaded when the device is in test mode,
which is determined by the presence of the /mnt/aux/test-mode file.
However, placing this file via the Qeneth system proved to be
inconvenient in the test environment. Therefore, it the entire image is
built in test mode, with the 'test-mode' file preloaded onto the disk
image (specifically in the auxiliary partition).
To support this, a new variable, (bool) DISK_IMAGE_TEST_MODE, has been
introduced:

 enabled: the image will be built in the test mode;
 disabled: the image will be built in the standard mode.

Part of issue #568

board/common/Config.in

@@ -107,6 +107,18 @@ config DISK_IMAGE_BOOT_OFFSET
 	  to make sure that the GPT still fits at the start of the
 	  image.
 
+config DISK_IMAGE_TEST_MODE
+	bool "Enable Test Mode"
+	depends on DISK_IMAGE
+	default y
+	help
+	  Enable the test mode option by default. This setting creates a test-mode flag
+	  in the auxiliary partition of the disk image, initiating the system with the test-config
+	  instead of regular startup-config. The primary purpose of running an image in this mode
+	  is to ensure proper execution of all Infix tests. Additionally, it enables extra RPCs
+	  related to system restart and configuration overrides, allowing tests to be run even on
+	  systems where the factory configuration may potentially create L2 loops. 
+
 config DISK_IMAGE_RELEASE_URL
 	string "Infix URL"
 	depends on DISK_IMAGE

board/common/mkdisk.sh

@@ -128,7 +128,7 @@ diskimg=disk.img
 bootimg=
 bootpart=
 
-while getopts "a:b:B:n:s:" opt; do
+while getopts "a:b:B:n:s:t" opt; do
     case ${opt} in
 	a)
 	    arch=$OPTARG
@@ -145,6 +145,9 @@ while getopts "a:b:B:n:s:" opt; do
 	s)
 	    total=$(size2int $OPTARG)
 	    ;;
+	t)
+		testmode=true
+		;;
     esac
 done
 shift $((OPTIND - 1))
@@ -190,6 +193,12 @@ cp -f $BINARIES_DIR/rootfs.itbh $root/aux/primary.itbh
 cp -f $BINARIES_DIR/rootfs.itbh $root/aux/secondary.itbh
 cp -f $BINARIES_DIR/rauc.status $root/aux/rauc.status
 
+if [ "$testmode" = true ]; then
+    touch "$root/aux/test-mode"
+else 
+    rm -f "$root/aux/test-mode"
+fi
+
 case "$arch" in
     aarch64)
 	mkenvimage -s 0x4000 -o "$root/aux/uboot.env" \

board/common/post-image.sh

@@ -59,8 +59,13 @@ if [ "$DISK_IMAGE" = "y" ]; then
 	tar -xa --strip-components=1 -C "$BINARIES_DIR" -f "$archive"
     fi
 
+    testmode_flag=""
+    if [ "$DISK_IMAGE_TEST_MODE" = "y" ]; then 
+	testmode_flag="-t"
+    fi
+
     $common/mkrauc-status.sh "$BINARIES_DIR/${NAME}.pkg" >"$BINARIES_DIR/rauc.status"
-    $common/mkdisk.sh -a $BR2_ARCH -n $diskimg -s $DISK_IMAGE_SIZE $bootcfg
+    $common/mkdisk.sh -a $BR2_ARCH -n $diskimg $testmode_flag -s $DISK_IMAGE_SIZE $bootcfg
 fi
 
 load_cfg SDCARD_AUX