From 28aba6b79a16d995659a2e46fe1a4be615de5c9b Mon Sep 17 00:00:00 2001
From: Sanchayan Maity <maitysanchayan@gmail.com>
Date: Mon, 7 Aug 2017 17:27:44 +0530
Subject: recipes-images: images: Use ext4 by default for TK1 modules

Use ext4 by default for TK1 modules.

Signed-off-by: Sanchayan Maity <maitysanchayan@gmail.com>
Acked-by: Max Krummenacher <max.krummenacher@toradex.com>
---
 .../tegra-uboot-flasher/genext4fs.sh               | 80 ++++++++++++++++++++++
 1 file changed, 80 insertions(+)
 create mode 100755 recipes-images/images/files/apalis-tk1-mainline/tegra-uboot-flasher/genext4fs.sh

(limited to 'recipes-images/images/files/apalis-tk1-mainline/tegra-uboot-flasher/genext4fs.sh')

diff --git a/recipes-images/images/files/apalis-tk1-mainline/tegra-uboot-flasher/genext4fs.sh b/recipes-images/images/files/apalis-tk1-mainline/tegra-uboot-flasher/genext4fs.sh
new file mode 100755
index 0000000..56e79f5
--- /dev/null
+++ b/recipes-images/images/files/apalis-tk1-mainline/tegra-uboot-flasher/genext4fs.sh
@@ -0,0 +1,80 @@
+#!/bin/sh
+#creates a file containing a ext4 binary blob of the content of the ../rootfs folder
+
+# sometimes we need the binary echo, not the shell builtin
+ECHO=`which echo`
+
+MOUNTPOINT="mnt/tdx-rootfs"
+
+Usage()
+{
+	echo "creates a file containing a ext4 binary blob. Output file name taken from command line"
+	echo "Usage: genext4fs.sh [OPTION]... dest_file_name"
+	echo "-h : Prints this message"
+	echo "-b : Sets the partition size in MBytes, default 256"
+	echo "-d : Selects the directory which contains the partition content, default ../rootfs"
+	echo ""
+}
+
+PARTITIONSIZE=256
+SRCPATH=../rootfs
+
+while getopts "b:d:h" Option ; do
+	case $Option in
+		h) Usage
+			# Exit if only usage (-h) was specfied.
+			if [[ "$#" -eq "1" ]] ; then
+				exit 10
+			fi
+			exit 0
+			;;
+		b) PARTITIONSIZE=$OPTARG
+			;;
+		d) SRCPATH=$OPTARG
+			;;
+	esac
+done
+#adjust the commandline arg for the now used options
+shift $(($OPTIND - 1))
+
+#create the file used for the loopbackdevice and format it for ext4
+#answer y to "is not a block special device"
+dd if=/dev/zero of=$@ bs=1024k count=$PARTITIONSIZE
+mkfs.ext4 -F -L rootfs $@
+#disable fsck checks based on mount count or time interval
+tune2fs -c 0 -i 0 $@
+
+#prepare mountpoint for the loopdevice 
+sudo mkdir -p $MOUNTPOINT
+sudo umount $MOUNTPOINT &> /dev/null
+sudo rm -rf $MOUNTPOINT/*
+#mount the file as a loopdevice 
+#there seems to be a race between mkfs.ext4 not yet finished and mount already trying to mount, so try until it works
+MOUNTED=0
+while [ "$MOUNTED" -eq  "0" ] ; do
+	sync
+	sleep 1
+	sudo mount $@ $MOUNTPOINT/ -o loop -t ext4
+	MOUNTED=`mount | grep -c "$MOUNTPOINT"`
+done
+#extract rootfs into the file
+sudo cp -rpP $SRCPATH/* $MOUNTPOINT
+if [ "$?" -ne "0" ] ; then
+	$ECHO -e "\033[1mCopying the rootfs failed.\033[0m"
+	echo "Check for error messages from cp"
+	sudo rm $@
+	exit 1
+fi
+
+#unmount again
+sudo umount $MOUNTPOINT
+
+#if the mounting was unsuccesful all rootfs data now still is in MOUNTPOINT, and $@ contains an empty fs
+#delete $@ in that case to fail early
+sync
+FAILED=`ls $MOUNTPOINT | wc -l`
+if [ "$FAILED" -ne "0" ] ; then
+	$ECHO -e "\033[1mMounting the loopdevice $@ failed.\033[0m"
+	sudo rm $@
+	exit 1
+fi
-- 
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