1 files changed, 53 insertions, 0 deletions
diff --git a/recipes-core/fs-init/files/mx6/resizefs.sh b/recipes-core/fs-init/files/mx6/resizefs.sh
new file mode 100755
index 0000000..8f066d1
--- /dev/null
+++ b/recipes-core/fs-init/files/mx6/resizefs.sh
@@ -0,0 +1,53 @@
+#!/bin/sh
+# resize the rootfs ext filesystem size to its full partition size
+# usually used on first boot in a postinstall script
+# or set in an autostart file from a postinstall script
+
+DISK="mmcblk0"
+PART="mmcblk0p2"
+
+logger "resizing $PART to fill its full partition size"
+# get the disk total size
+DISK_SIZE=`cat /sys/block/$DISK/size`
+
+# get partition start and size
+PART_OFF=`cat /sys/block/$DISK/$PART/start`
+PART_SIZE=`cat /sys/block/$DISK/$PART/size`
+
+# calculate size after the partition to the end of disk
+SPARE=`expr $DISK_SIZE - $PART_OFF - $PART_SIZE`
+
+# new filesystem size, it must not overlap the secondary gpt header
+# assume 1024kB as GPT size (is 34 sectors)
+if [ $SPARE -lt 2048 ]
+then
+	FSSIZE=`expr $PART_SIZE - 2048`
+else
+	FSSIZE=$PART_SIZE
+fi
+
+# resize now
+
+#reduce I/O load by doing this in STEPSIZE increments
+#idea stolen from here:
+#https://codereview.chromium.org/551127
+
+#start from the current size in blocks of 512 byte, add STEPSIZE on each iteration
+STEPSIZE=`expr 64 \* 1024 \* 2`
+NEXTSIZE=`df /dev/$PART | grep /dev/root | awk '{print $2}'`
+NEXTSIZE=`expr $NEXTSIZE \* 2`
+NEXTSIZE=`expr $NEXTSIZE + $STEPSIZE`
+while [ $NEXTSIZE -lt $FSSIZE ]; do
+	FSSIZEMEG=`expr $NEXTSIZE / 2 / 1024`"M"
+	resize2fs /dev/$PART $FSSIZEMEG
+	sleep 1
+	NEXTSIZE=`expr $NEXTSIZE + $STEPSIZE`
+done
+FSSIZEMEG=`expr $FSSIZE / 2 / 1024`"M"
+resize2fs /dev/$PART $FSSIZEMEG
+
+#job done, remove it from systemd services
+systemctl disable resizefs.service
+
+logger "resizing $PART finished, new size is $FSSIZEMEG"
+