From 76f2e17f11b08a0c05bc1a19c7732cffa2500c11 Mon Sep 17 00:00:00 2001
From: =?utf8?q?=C5=81ukasz=20Stelmach?= <l.stelmach@samsung.com>
Date: Thu, 24 Aug 2023 12:05:04 +0200
Subject: [PATCH] scripts: Add support for cereating images for use with QEMU.
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Using the loopback driver the script can create, partition and record
Tizen onto a disk image (a regular file) that can be used to run Tizen
in QEMU.

Change-Id: I819f10899c0e4c4532fe7c65e9e00b43b69a4a04
Signed-off-by: Łukasz Stelmach <l.stelmach@samsung.com>
---
 scripts/tizen/sd_fusing_vf2.sh | 46 ++++++++++++++++++++++++++++++++++++------
 1 file changed, 40 insertions(+), 6 deletions(-)

diff --git a/scripts/tizen/sd_fusing_vf2.sh b/scripts/tizen/sd_fusing_vf2.sh
index d8c9e06..5b7cc9b 100755
--- a/scripts/tizen/sd_fusing_vf2.sh
+++ b/scripts/tizen/sd_fusing_vf2.sh
@@ -1,7 +1,10 @@
 #!/bin/bash
 
-declare FORMAT=""
+declare CREATE=""
 declare DEVICE=""
+declare FILE=""
+declare FORMAT=""
+declare LOOP_SIZE="8192"
 declare -i OLD_DD=0
 
 # Binaires array for fusing
@@ -30,6 +33,9 @@ declare -a PART_TABLE=(
 declare -r -i PART_TABLE_COL=5
 declare -r -i PART_TABLE_ROW=${#PART_TABLE[*]}/${PART_TABLE_COL}
 
+# tear down loopback device on exit
+trap 'test -n "$FILE" && losetup -d "$DEVICE"' EXIT
+
 # partition table support
 function get_index_use_name () {
 	local -r binary_name=$1
@@ -298,9 +304,11 @@ function mkpart_3 () {
 
 function show_usage () {
 	echo "- Usage:"
-	echo "	sudo ./sd_fusing*.sh -d <device> [-b <path> <path> ..] [--format]"
-	echo "  -d  : device ndoe "
-	echo "  -b  : binary "
+	echo "	sudo ./sd_fusing*.sh -d <device> [-b <path> <path> ..] [--format] [--create]"
+	echo "  --create : create the backing file and format the loopback device"
+	echo "  -d       : device node or loopback backing file"
+	echo "  -b       : binary"
+	echo "  -s       : size of the loopback device to create in MiB"
 }
 
 function check_partition_format () {
@@ -355,6 +363,22 @@ function check_args () {
 }
 
 function check_device () {
+	if [ ! -e "$DEVICE" -a "$CREATE" == "1" ]; then
+		dd if=/dev/zero of="$DEVICE" conv=sparse bs=1M count=$LOOP_SIZE
+		if [ "$?" != "0" ]; then
+			echo "Failed to create the backing file"
+			exit -1
+		fi
+	fi
+	if [ -f "$DEVICE" ]; then
+		FILE="$DEVICE"
+		DEVICE=$(losetup --partscan --show --find $FILE)
+		if [ "$?" != "0" ]; then
+			echo "Failed to set up the loopback device"
+			exit -1
+		fi
+	fi
+
 	if [ ! -b "$DEVICE" ]; then
 		echo "No such device: $DEVICE"
 		exit 0
@@ -382,7 +406,7 @@ function check_device () {
 
 function print_logo () {
 	echo ""
-	echo "For VisionFive2 , version 1.0.1"
+	echo "For VisionFive2 and QEMU, version 1.1.0"
 	echo ""
 }
 
@@ -410,7 +434,12 @@ while test $# -ne 0; do
 	shift
 
 	case $option in
-	--f | --format)
+	-c | --create)
+		CREATE="1"
+		set -- -f "${@}"
+		binary_option=0
+		;;
+	-f | --format)
 		FORMAT="1"
 		binary_option=0
 		;;
@@ -424,6 +453,11 @@ while test $# -ne 0; do
 		binary_option=1
 		shift
 		;;
+	-s)
+		LOOP_SIZE=$1
+		binary_option=0
+		shift
+		;;
 	*)
 		if [ $binary_option == 1 ];then
 			add_fusing_binary $option
-- 
2.7.4