selftests/net: Adding test cases of replacing routes and route advert…

…isements.

Add tests of changing permanent routes to temporary routes and the reversed
case to make sure GC working correctly in these cases.

Add tests for the temporary routes from RA.

Signed-off-by: Kui-Feng Lee <thinker.li@gmail.com>

tools/testing/selftests/net/fib_tests.sh

@@ -768,39 +768,146 @@ fib6_gc_test()
 	    $IP -6 route add 2001:20::$i \
 		via 2001:10::2 dev dummy_10 expires $EXPIRE
 	done
-	sleep $(($EXPIRE * 2))
+	sleep $(($EXPIRE * 2 + 1))
 	N_EXP_SLEEP=$($IP -6 route list |grep expires|wc -l)
 	if [ $N_EXP_SLEEP -ne 0 ]; then
 	    echo "FAIL: expected 0 routes with expires, got $N_EXP_SLEEP"
 	    ret=1
 	else
-	    ret=0
+	    # Permanent routes
+	    for i in $(seq 1 5000); do
+		$IP -6 route add 2001:30::$i \
+		    via 2001:10::2 dev dummy_10
+	    done
+	    # Temporary routes
+	    for i in $(seq 1 1000); do
+		# Expire route after $EXPIRE seconds
+		$IP -6 route add 2001:20::$i \
+		    via 2001:10::2 dev dummy_10 expires $EXPIRE
+	    done
+	    sleep $(($EXPIRE * 2 + 1))
+	    N_EXP_SLEEP=$($IP -6 route list |grep expires|wc -l)
+	    if [ $N_EXP_SLEEP -ne 0 ]; then
+		echo "FAIL: expected 0 routes with expires," \
+		     "got $N_EXP_SLEEP (5000 permanent routes)"
+		ret=1
+	    else
+		ret=0
+	    fi
 	fi
 
+	$IP link del dev dummy_10
+	$IP link add dummy_10 type dummy
+	$IP link set dev dummy_10 up
+	$IP -6 address add 2001:10::1/64 dev dummy_10
+
+	log_test $ret 0 "ipv6 route garbage collection"
+
 	# Permanent routes
-	for i in $(seq 1 5000); do
-	    $IP -6 route add 2001:30::$i \
+	for i in $(seq 1 100); do
+	    # Expire route after $EXPIRE seconds
+	    $IP -6 route add 2001:20::$i \
 		via 2001:10::2 dev dummy_10
 	done
+	# Replace with temporary routes
+	for i in $(seq 1 100); do
+	    # Expire route after $EXPIRE seconds
+	    $IP -6 route replace 2001:20::$i \
+		via 2001:10::2 dev dummy_10 expires $EXPIRE
+	done
+	N_EXP_SLEEP=$($IP -6 route list |grep expires|wc -l)
+	if [ $N_EXP_SLEEP -ne 100 ]; then
+	    echo "FAIL: expected 100 routes with expires, got $N_EXP_SLEEP"
+	fi
+	sleep $(($EXPIRE * 2 + 1))
+	N_EXP_SLEEP=$($IP -6 route list |grep expires|wc -l)
+	if [ $N_EXP_SLEEP -ne 0 ]; then
+	    echo "FAIL: expected 0 routes with expires," \
+		 "got $N_EXP_SLEEP"
+	    ret=1
+	else
+	    ret=0
+	fi
+
+	$IP link del dev dummy_10
+	$IP link add dummy_10 type dummy
+	$IP link set dev dummy_10 up
+	$IP -6 address add 2001:10::1/64 dev dummy_10
+
+	log_test $ret 0 "ipv6 route garbage collection (replace with expires)"
+
+	PERM_BASE=$($IP -6 route list |grep -v expires|wc -l)
 	# Temporary routes
-	for i in $(seq 1 1000); do
+	for i in $(seq 1 100); do
 	    # Expire route after $EXPIRE seconds
 	    $IP -6 route add 2001:20::$i \
 		via 2001:10::2 dev dummy_10 expires $EXPIRE
 	done
-	sleep $(($EXPIRE * 2))
+	# Replace with permanent routes
+	for i in $(seq 1 100); do
+	    # Expire route after $EXPIRE seconds
+	    $IP -6 route replace 2001:20::$i \
+		via 2001:10::2 dev dummy_10
+	done
 	N_EXP_SLEEP=$($IP -6 route list |grep expires|wc -l)
 	if [ $N_EXP_SLEEP -ne 0 ]; then
 	    echo "FAIL: expected 0 routes with expires," \
-		 "got $N_EXP_SLEEP (5000 permanent routes)"
+		 "got $N_EXP_SLEEP"
+	fi
+	sleep $(($EXPIRE * 2 + 1))
+	N_EXP_PERM=$($IP -6 route list |grep -v expires|wc -l)
+	N_EXP_PERM=$(($N_EXP_PERM - $PERM_BASE))
+	if [ $N_EXP_PERM -ne 100 ]; then
+	    echo "FAIL: expected 100 permanent routes," \
+		 "got $N_EXP_PERM"
 	    ret=1
 	else
 	    ret=0
 	fi
 
-	set +e
+	$IP link del dev dummy_10
+	$IP link add veth1 type veth peer name veth2
+	$IP link set dev veth1 up
+	$IP link set dev veth2 up
+	$IP -6 address add 2001:10::1/64 dev veth1 nodad
+	$IP -6 address add 2001:10::2/64 dev veth2 nodad
+
+	log_test $ret 0 "ipv6 route garbage collection (replace with permanent)"
+
+	# Routes received from RA
+	if ! which ra6 &>/dev/null; then
+		echo "SKIP: ra6 not found"
+		cleanup &> /dev/null
+		set +e
+		return 0
+	fi
 
-	log_test $ret 0 "ipv6 route garbage collection"
+	systemctl stop systemd-networkd.socket
+	systemctl stop systemd-networkd.service
+	$NS_EXEC sysctl -w net.ipv6.conf.veth1.accept_ra=2 &> /dev/null
+	$NS_EXEC sysctl -w net.ipv6.conf.veth1.accept_ra_rt_info_max_plen=127 &> /dev/null
+	RA6=$(which ra6)
+	$NS_EXEC $RA6 -i veth2 -d 2001:10::1 -R '2003:10::/64#1#$EXPIRE' -t $EXPIRE
+	N_EXP=$($IP -6 route list |grep expires|wc -l)
+	if [ $N_EXP -ne 1 ]; then
+	    echo "FAIL: expected 1 routes with expires," \
+		 "got $N_EXP"
+	    ret=1
+	else
+	    sleep $(($EXPIRE * 2 + 1))
+	    N_EXP=$($IP -6 route list |grep expires|wc -l)
+	    if [ $N_EXP -ne 0 ]; then
+		echo "FAIL: expected 0 routes with expires," \
+		     "got $N_EXP"
+		ret=1
+	    else
+		ret=0
+	    fi
+	fi
+
+	log_test $ret 0 "ipv6 route garbage collection (ra6)"
+
+	set +e
 
 	cleanup &> /dev/null
 }