swtpm: Add tests for "linear file" backend

Adapt save_load_state tests to include coverage of the "linear file"
backend mode. "tpm2" is save/load is tested with both a regular file and
a loop device to excercise the blockdev mmap code.

Signed-off-by: Stefan Reiter <stefan@pimaker.at>

tests/Makefile.am

@@ -63,6 +63,8 @@ TESTS += \
 	test_tpm2_save_load_encrypted_state \
 	test_tpm2_save_load_state \
 	test_tpm2_save_load_state_2 \
+	test_tpm2_save_load_state_2_linear \
+	test_tpm2_save_load_state_2_block \
 	test_tpm2_save_load_state_3 \
 	test_tpm2_save_load_state_da_timeout \
 	test_tpm2_setbuffersize \

tests/_test_save_load_state

@@ -17,6 +17,12 @@ MY_SAVESTATE_STATE_FILE=$TPM_PATH/my.savestate
 SWTPM_CMD_UNIX_PATH=${TPM_PATH}/unix-cmd.sock
 SWTPM_CTRL_UNIX_PATH=${TPM_PATH}/unix-ctrl.sock
 SWTPM_INTERFACE=${SWTPM_INTERFACE:-cuse}
+LINEAR_STATE_FILE=$TPM_PATH/linear-state
+BACKEND_PARAM=""
+
+if [ ${SWTPM_TEST_LINEAR_FILE:-0} -ne 0 ]; then
+	BACKEND_PARAM="--tpmstate backend-uri=file://$LINEAR_STATE_FILE"
+fi
 
 logfile=$(mktemp)
 
@@ -38,6 +44,7 @@ source ${TESTDIR}/common
 rm -f $STATE_FILE $VOLATILE_STATE_FILE 2>/dev/null
 
 run_swtpm ${SWTPM_INTERFACE} \
+	${BACKEND_PARAM} \
 	--log file=$logfile
 
 display_processes_by_name "$SWTPM"
@@ -274,7 +281,7 @@ if [ $? -ne 0 ]; then
 	exit 1
 fi
 
-if [ ! -r $VOLATILE_STATE_FILE ]; then
+if [ ${SWTPM_TEST_LINEAR_FILE:-0} -eq 0 ] && [ ! -r $VOLATILE_STATE_FILE ]; then
 	echo "Error: Volatile state file $VOLATILE_STATE_FILE does not exist."
 	echo "TPM Logfile:"
 	cat $logfile
@@ -326,11 +333,20 @@ if wait_process_gone ${SWTPM_PID} 4; then
 	exit 1
 fi
 
-if [ ! -e $STATE_FILE ]; then
-	echo "Error: TPM state file $STATE_FILE does not exist."
-	echo "TPM Logfile:"
-	cat $logfile
-	exit 1
+if [ ${SWTPM_TEST_LINEAR_FILE:-0} -ne 0 ]; then
+	if [ ! -e $LINEAR_STATE_FILE ]; then
+		echo "Error: TPM state file $LINEAR_STATE_FILE does not exist."
+		echo "TPM Logfile:"
+		cat $logfile
+		exit 1
+	fi
+else
+	if [ ! -e $STATE_FILE ]; then
+		echo "Error: TPM state file $STATE_FILE does not exist."
+		echo "TPM Logfile:"
+		cat $logfile
+		exit 1
+	fi
 fi
 
 echo "OK"

tests/test_save_load_state

@@ -39,4 +39,15 @@ bash _test_save_load_state
 ret=$?
 [ $ret -ne 0  ] && [ $ret -ne 77 ] && exit $ret
 
+echo "=== Testing with linear file backend ==="
+
+export SWTPM_INTERFACE=socket+socket
+export SWTPM_SERVER_NAME=localhost
+export SWTPM_SERVER_PORT=65418
+export SWTPM_CTRL_PORT=65419
+export SWTPM_TEST_LINEAR_FILE=1
+bash _test_save_load_state
+ret=$?
+[ $ret -ne 0  ] && [ $ret -ne 77 ] && exit $ret
+
 exit 0

tests/test_tpm2_save_load_state_2

@@ -34,6 +34,13 @@ LOGFILE=$TPMDIR/logfile
 TMPFILE=$TPMDIR/tmpfile
 BINFILE=$TPMDIR/binfile
 SIGFILE=$TPMDIR/sigfile
+STATEFILE=${STATEFILE:-$TPMDIR/state}
+
+STORE_PARAM="dir=$TPMDIR"
+if [ ${SWTPM_TEST_LINEAR_FILE:-0} -ne 0 ]; then
+	echo "Testing with linear file backend ($STATEFILE)"
+	STORE_PARAM="backend-uri=file://$STATEFILE"
+fi
 
 source ${TESTDIR}/test_common
 source ${TESTDIR}/common
@@ -173,13 +180,13 @@ function fillup_nvram()
 export TPM_SERVER_TYPE=raw
 export TPM_SERVER_NAME=127.0.0.1
 export TPM_INTERFACE_TYPE=socsim
-export TPM_COMMAND_PORT=65446
+export TPM_COMMAND_PORT=${TPM_COMMAND_PORT:-65460}
 export TPM_DATA_DIR=$TPMDIR
 export TPM_SESSION_ENCKEY="807e2bfe898ddaed8fa6310e716a24dc" # for sessions
 
 $SWTPM_EXE socket \
 	--server port=${TPM_COMMAND_PORT} \
-	--tpmstate dir=$TPMDIR \
+	--tpmstate $STORE_PARAM \
 	--pid file=$PID_FILE \
 	--ctrl type=unixio,path=$SOCK_PATH \
 	--log file=$LOGFILE,level=20 \
@@ -233,7 +240,7 @@ echo "TPM was shut down"
 
 $SWTPM_EXE socket \
 	--server port=${TPM_COMMAND_PORT} \
-	--tpmstate dir=$TPMDIR \
+	--tpmstate $STORE_PARAM \
 	--pid file=$PID_FILE \
 	--ctrl type=unixio,path=$SOCK_PATH \
 	--log file=$LOGFILE,level=20 \
@@ -287,13 +294,18 @@ echo "TPM was shut down"
 #################################################################
 # Run TPM2 with previously saved state and verify it's the same
 
+if [ ${SWTPM_TEST_LINEAR_FILE:-0} -ne 0 ]; then
+	echo "Test 1 OK (skipped last with linear file)"
+	exit 0
+fi
+
 rm -f $TPMDIR/*
 cp -f ${TESTDIR}/data/tpm2state5/tpm2-00.permall $TPMDIR/tpm2-00.permall
 cp ${TESTDIR}/data/tpm2state5/signature.bin $SIGFILE
 
 $SWTPM_EXE socket \
 	--server port=${TPM_COMMAND_PORT} \
-	--tpmstate dir=$TPMDIR \
+	--tpmstate $STORE_PARAM \
 	--pid file=$PID_FILE \
 	--ctrl type=unixio,path=$SOCK_PATH \
 	--log file=$LOGFILE,level=20 \

tests/test_tpm2_save_load_state_2_block

@@ -0,0 +1,31 @@
+#!/bin/bash
+
+if [ "$(id -u)" -ne 0 ]; then
+	echo "Need to be root to run this test."
+	exit 77
+fi
+
+STATEDIR=$(mktemp -d)
+STATEIMG=$STATEDIR/tpm2.img
+STATEFILE=""
+
+trap "cleanup" SIGTERM EXIT
+function cleanup()
+{
+	rm -rf $STATEDIR
+	if [ -n "$STATEFILE" ]; then
+		losetup -d $STATEFILE
+	fi
+}
+
+# allocate 4 MiB file
+fallocate -x -l $((4 * 1024 * 1024)) "$STATEIMG"
+# and loop mount it
+STATEFILE=$(losetup --show -f $STATEIMG)
+
+export SWTPM_TEST_LINEAR_FILE=1
+export TPM_COMMAND_PORT=65462
+export STATEFILE
+
+# don't exec so cleanup will remove the loop device
+$(dirname $0)/test_tpm2_save_load_state_2

tests/test_tpm2_save_load_state_2_linear

@@ -0,0 +1,5 @@
+#!/bin/bash
+
+export SWTPM_TEST_LINEAR_FILE=1
+export TPM_COMMAND_PORT=65461
+exec $(dirname $0)/test_tpm2_save_load_state_2