From 75cfcc62f58f84cb68e982980407d6033e8feece Mon Sep 17 00:00:00 2001
From: Ricardo Salveti <ricardo@foundries.io>
Date: Sun, 24 Jul 2022 23:14:52 -0300
Subject: [PATCH] base: resize-helper: add support for luks based rootfs

LUKS2-based devices requires an additional resize (cryptsetup resize)
before performing the actual file system resize with resize2fs.

Signed-off-by: Ricardo Salveti <ricardo@foundries.io>
---
 .../resize-helper/resize-helper/resize-helper   | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/meta-lmp-base/recipes-support/resize-helper/resize-helper/resize-helper b/meta-lmp-base/recipes-support/resize-helper/resize-helper/resize-helper
index 4616b5a9e..abf8545fd 100644
--- a/meta-lmp-base/recipes-support/resize-helper/resize-helper/resize-helper
+++ b/meta-lmp-base/recipes-support/resize-helper/resize-helper/resize-helper
@@ -38,8 +38,16 @@ RESIZE2FS=$(which resize2fs) || { echo "E: You must have resize2fs" && exit 1; }
 
 # find root device
 ROOT_DEVICE=$(findmnt --noheadings --output=SOURCE / | cut -d'[' -f1)
+# identify a possible mapper-based device (e.g. luks)
+if echo ${ROOT_DEVICE} | grep -q "^/dev/mapper/"; then
+	DM_NAME=`basename ${ROOT_DEVICE}`
+fi
 # prune root device (for example UUID)
 ROOT_DEVICE=$(realpath ${ROOT_DEVICE})
+# check if root device is available via device-mapper / luks
+if basename ${ROOT_DEVICE} | grep -q "^dm-"; then
+	ROOT_DEVICE="/dev/`dmsetup deps -o devname ${ROOT_DEVICE} | cut -d'(' -f2 | cut -d')' -f1`"
+fi
 # get the partition number and type
 INFO=$(udevadm info --query=property --name=${ROOT_DEVICE})
 PART_ENTRY_NUMBER=$(echo "${INFO}" | grep '^ID_PART_ENTRY_NUMBER=' | cut -d'=' -f2)
@@ -78,4 +86,11 @@ if [ -n "${PART_ENTRY_NAME}" ]; then
 fi
 
 ${PARTX} -u ${DEVICE}
-${RESIZE2FS} "${ROOT_DEVICE}"
+if [ -n "${DM_NAME}" ] && cryptsetup isLuks ${ROOT_DEVICE}; then
+	# OP-TEE: use TEE Identity for pkcs11 authentication
+	export CKTEEC_LOGIN_TYPE=user
+	cryptsetup resize --token-only ${DM_NAME}
+	${RESIZE2FS} "/dev/mapper/${DM_NAME}"
+else
+	${RESIZE2FS} "${ROOT_DEVICE}"
+fi