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#!/system/bin/sh
DEVICE="/dev/block/platform/omap/omap_hsmmc.0/by-name/dgs"
log_to_kernel() {
echo "$*" > /dev/kmsg
}
create_tee_fs() {
make_ext4fs -J -b 4096 ${DEVICE} || exit 1
mount -t ext4 ${DEVICE} /tee || exit 1
mkdir /tee/smc || exit 1
chmod 0770 /tee/smc || exit 1
chown drmrpc:drmrpc /tee/smc || exit 1
restorecon -R /tee/smc || exit 1
}
if [ ! -e /tee/smc ]; then
# sha1 hash of the empty 4MB partition.
EXPECTED_HASH="2bccbd2f38f15c13eb7d5a89fd9d85f595e23bc3"
ACTUAL_HASH="`/system/bin/sha1sum ${DEVICE}`"
if [ "${ACTUAL_HASH}" == "${EXPECTED_HASH} ${DEVICE}" ]; then
if create_tee_fs > /dev/kmsg 2>&1; then
log_to_kernel "tee-fs-setup: successfully initialized /tee for SMC, rebooting."
# tf_daemon gets stuck when started after FS initialization,
# but works fine after reboot.
mount -t ext4 -o remount,ro /tee
reboot
else
log_to_kernel "tee-fs-setup: initialization of /tee for SMC failed. SMC won't function!"
fi
else
log_to_kernel "tee-fs-setup: unexpected hash '${ACTUAL_HASH}', skipping /tee filesystem creation. SMC won't function!"
fi
else
log_to_kernel "tee-fs-setup: /tee is already initialized for SMC, nothing to do."
setprop init.tee_fs.ready true
fi
exit 0
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