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Date: Wed, 2 Oct 2019 11:41:03 +0300
From: Ido Schimmel <idosch@...sch.org>
To: netdev@...r.kernel.org
Cc: davem@...emloft.net, dsahern@...il.com, jiri@...lanox.com,
jakub.kicinski@...ronome.com, saeedm@...lanox.com,
mlxsw@...lanox.com, Ido Schimmel <idosch@...lanox.com>
Subject: [RFC PATCH net-next 15/15] selftests: netdevsim: Add test for route offload API
From: Ido Schimmel <idosch@...lanox.com>
Test various aspects of the route offload API on top of the netdevsim
implementation. Both good and error flows are tested.
Signed-off-by: Ido Schimmel <idosch@...lanox.com>
---
.../drivers/net/netdevsim/fib_notifier.sh | 411 ++++++++++++++++++
1 file changed, 411 insertions(+)
create mode 100755 tools/testing/selftests/drivers/net/netdevsim/fib_notifier.sh
diff --git a/tools/testing/selftests/drivers/net/netdevsim/fib_notifier.sh b/tools/testing/selftests/drivers/net/netdevsim/fib_notifier.sh
new file mode 100755
index 000000000000..27b0752df67f
--- /dev/null
+++ b/tools/testing/selftests/drivers/net/netdevsim/fib_notifier.sh
@@ -0,0 +1,411 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+#
+# This test is for checking the FIB notification API. It makes use of netdevsim
+# which registers a listener to the FIB notification chain.
+
+lib_dir=$(dirname $0)/../../../net/forwarding
+
+ALL_TESTS="
+ ipv4_identical_routes
+ ipv4_tos
+ ipv4_metric
+ ipv4_replace
+ ipv4_delete
+ ipv4_plen
+ ipv4_replay
+ ipv4_error_path
+ ipv4_flush
+"
+NETDEVSIM_PATH=/sys/bus/netdevsim/
+DEV_ADDR=1337
+DEV=netdevsim${DEV_ADDR}
+DEVLINK_DEV=netdevsim/${DEV}
+NUM_NETIFS=0
+source $lib_dir/lib.sh
+source $lib_dir/devlink_lib.sh
+
+route_in_hw_check()
+{
+ local route=$1; shift
+
+ ip -n testns1 route show $route | grep -q "in_hw"
+}
+
+ipv4_identical_routes()
+{
+ local i
+
+ RET=0
+
+ for i in $(seq 1 3); do
+ ip -n testns1 link add name dummy$i type dummy
+ ip -n testns1 link set dev dummy$i up
+ done
+
+ ip -n testns1 route add 192.0.2.0/24 dev dummy1 tos 0 metric 1024
+ route_in_hw_check "192.0.2.0/24 dev dummy1 tos 0 metric 1024"
+ check_err $? "Route not in hardware when should"
+
+ ip -n testns1 route append 192.0.2.0/24 dev dummy2 tos 0 metric 1024
+ route_in_hw_check "192.0.2.0/24 dev dummy2 tos 0 metric 1024"
+ check_fail $? "Appended route in hardware when should not"
+
+ ip -n testns1 route prepend 192.0.2.0/24 dev dummy3 tos 0 metric 1024
+ route_in_hw_check "192.0.2.0/24 dev dummy3 tos 0 metric 1024"
+ check_err $? "Prepended route not in hardware when should"
+
+ route_in_hw_check "192.0.2.0/24 dev dummy1 tos 0 metric 1024"
+ check_fail $? "Route was not replaced in hardware by prepended one"
+
+ log_test "IPv4 identical routes"
+
+ for i in $(seq 1 3); do
+ ip -n testns1 link del dev dummy$i
+ done
+}
+
+ipv4_tos()
+{
+ RET=0
+
+ ip -n testns1 link add name dummy1 type dummy
+ ip -n testns1 link set dev dummy1 up
+
+ ip -n testns1 route add 192.0.2.0/24 dev dummy1 tos 0 metric 1024
+ route_in_hw_check "192.0.2.0/24 dev dummy1 tos 0 metric 1024"
+ check_err $? "Route not in hardware when should"
+
+ ip -n testns1 route add 192.0.2.0/24 dev dummy1 tos 2 metric 1024
+ route_in_hw_check "192.0.2.0/24 dev dummy1 tos 2 metric 1024"
+ check_err $? "Highest TOS route not in hardware when should"
+
+ route_in_hw_check "192.0.2.0/24 dev dummy1 tos 0 metric 1024"
+ check_fail $? "Lowest TOS route still in hardware when should not"
+
+ ip -n testns1 route add 192.0.2.0/24 dev dummy1 tos 1 metric 1024
+ route_in_hw_check "192.0.2.0/24 dev dummy1 tos 1 metric 1024"
+ check_fail $? "Middle TOS route in hardware when should not"
+
+ log_test "IPv4 routes with TOS"
+
+ ip -n testns1 link del dev dummy1
+}
+
+ipv4_metric()
+{
+ RET=0
+
+ ip -n testns1 link add name dummy1 type dummy
+ ip -n testns1 link set dev dummy1 up
+
+ ip -n testns1 route add 192.0.2.0/24 dev dummy1 metric 1024
+ route_in_hw_check "192.0.2.0/24 dev dummy1 metric 1024"
+ check_err $? "Route not in hardware when should"
+
+ ip -n testns1 route add 192.0.2.0/24 dev dummy1 metric 1022
+ route_in_hw_check "192.0.2.0/24 dev dummy1 metric 1022"
+ check_err $? "Lowest metric route not in hardware when should"
+
+ route_in_hw_check "192.0.2.0/24 dev dummy1 metric 1024"
+ check_fail $? "Highest metric route still in hardware when should not"
+
+ ip -n testns1 route add 192.0.2.0/24 dev dummy1 metric 1023
+ route_in_hw_check "192.0.2.0/24 dev dummy1 tos 1 metric 1023"
+ check_fail $? "Middle metric route in hardware when should not"
+
+ log_test "IPv4 routes with metric"
+
+ ip -n testns1 link del dev dummy1
+}
+
+ipv4_replace()
+{
+ local i
+
+ RET=0
+
+ for i in $(seq 1 2); do
+ ip -n testns1 link add name dummy$i type dummy
+ ip -n testns1 link set dev dummy$i up
+ done
+
+ ip -n testns1 route add 192.0.2.0/24 dev dummy1 metric 1024
+ route_in_hw_check "192.0.2.0/24 dev dummy1 metric 1024"
+ check_err $? "Route not in hardware when should"
+
+ ip -n testns1 route replace 192.0.2.0/24 dev dummy2 metric 1024
+ route_in_hw_check "192.0.2.0/24 dev dummy2 metric 1024"
+ check_err $? "Replacement route not in hardware when should"
+
+ # Add a route with an higher metric and make sure that replacing it
+ # does not affect the lower metric one.
+ ip -n testns1 route add 192.0.2.0/24 dev dummy1 metric 1025
+ ip -n testns1 route replace 192.0.2.0/24 dev dummy2 metric 1025
+
+ route_in_hw_check "192.0.2.0/24 dev dummy2 metric 1024"
+ check_err $? "Lowest metric route not in hardware when should"
+ route_in_hw_check "192.0.2.0/24 dev dummy2 metric 1025"
+ check_fail $? "Highest metric route in hardware when should not"
+
+ log_test "IPv4 route replace"
+
+ for i in $(seq 1 2); do
+ ip -n testns1 link del dev dummy$i
+ done
+}
+
+ipv4_delete()
+{
+ local metric
+
+ RET=0
+
+ ip -n testns1 link add name dummy1 type dummy
+ ip -n testns1 link set dev dummy1 up
+
+ # Insert multiple routes with the same prefix and length and varying
+ # metrics. Make sure that throughout delete operations the lowest
+ # metric route is the one in hardware.
+ for metric in $(seq 1024 1026); do
+ ip -n testns1 route add 192.0.2.0/24 dev dummy1 metric $metric
+ done
+
+ route_in_hw_check "192.0.2.0/24 dev dummy1 metric 1024"
+ check_err $? "Route not in hardware when should"
+
+ ip -n testns1 route del 192.0.2.0/24 dev dummy1 metric 1024
+ route_in_hw_check "192.0.2.0/24 dev dummy1 metric 1025"
+ check_err $? "Lowest metric route not in hardware when should"
+
+ ip -n testns1 route del 192.0.2.0/24 dev dummy1 metric 1026
+ route_in_hw_check "192.0.2.0/24 dev dummy1 metric 1025"
+ check_err $? "Sole route not in hardware when should"
+
+ log_test "IPv4 route delete"
+
+ ip -n testns1 link del dev dummy1
+}
+
+ipv4_plen()
+{
+ RET=0
+
+ ip -n testns1 link add name dummy1 type dummy
+ ip -n testns1 link set dev dummy1 up
+
+ # Add two routes with the same key and different prefix length and
+ # make sure both are in hardware. It can be verfied that both are
+ # sharing the same leaf by checking the /proc/net/fib_trie
+ ip -n testns1 route add 192.0.2.0/24 dev dummy1
+ ip -n testns1 route add 192.0.2.0/25 dev dummy1
+
+ route_in_hw_check "192.0.2.0/24 dev dummy1"
+ check_err $? "/24 not in hardware when should"
+
+ route_in_hw_check "192.0.2.0/25 dev dummy1"
+ check_err $? "/25 not in hardware when should"
+
+ log_test "IPv4 routes with different prefix length"
+
+ ip -n testns1 link del dev dummy1
+}
+
+ipv4_replay_metric()
+{
+ RET=0
+
+ ip -n testns1 link add name dummy1 type dummy
+ ip -n testns1 link set dev dummy1 up
+
+ ip -n testns1 route add 192.0.2.0/24 dev dummy1 metric 1024
+ ip -n testns1 route add 192.0.2.0/24 dev dummy1 metric 1025
+
+ devlink -N testns1 dev reload $DEVLINK_DEV
+
+ route_in_hw_check "192.0.2.0/24 dev dummy1 metric 1024"
+ check_err $? "Lowest metric route not in hardware when should"
+
+ route_in_hw_check "192.0.2.0/24 dev dummy1 metric 1025"
+ check_fail $? "Highest metric route in hardware when should not"
+
+ log_test "IPv4 routes replay - metric"
+
+ ip -n testns1 link del dev dummy1
+}
+
+ipv4_replay_tos()
+{
+ RET=0
+
+ ip -n testns1 link add name dummy1 type dummy
+ ip -n testns1 link set dev dummy1 up
+
+ ip -n testns1 route add 192.0.2.0/24 dev dummy1 tos 0
+ ip -n testns1 route add 192.0.2.0/24 dev dummy1 tos 1
+
+ devlink -N testns1 dev reload $DEVLINK_DEV
+
+ route_in_hw_check "192.0.2.0/24 dev dummy1 tos 1"
+ check_err $? "Highest TOS route not in hardware when should"
+
+ route_in_hw_check "192.0.2.0/24 dev dummy1 tos 0"
+ check_fail $? "Lowest TOS route in hardware when should not"
+
+ log_test "IPv4 routes replay - TOS"
+
+ ip -n testns1 link del dev dummy1
+}
+
+ipv4_replay_plen()
+{
+ RET=0
+
+ ip -n testns1 link add name dummy1 type dummy
+ ip -n testns1 link set dev dummy1 up
+
+ ip -n testns1 route add 192.0.2.0/24 dev dummy1
+ ip -n testns1 route add 192.0.2.0/25 dev dummy1
+
+ devlink -N testns1 dev reload $DEVLINK_DEV
+
+ route_in_hw_check "192.0.2.0/24 dev dummy1"
+ check_err $? "/24 not in hardware when should"
+
+ route_in_hw_check "192.0.2.0/25 dev dummy1"
+ check_err $? "/25 not in hardware when should"
+
+ log_test "IPv4 routes replay - prefix length"
+
+ ip -n testns1 link del dev dummy1
+}
+
+ipv4_replay()
+{
+ # Install multiple routes with the same prefix and length and make sure
+ # that after reload only the routes that should be in hardware are
+ # replayed.
+ ipv4_replay_metric
+ ipv4_replay_tos
+ ipv4_replay_plen
+}
+
+ipv4_error_path_add()
+{
+ local lsb
+
+ RET=0
+
+ ip -n testns1 link add name dummy1 type dummy
+ ip -n testns1 link set dev dummy1 up
+
+ devlink -N testns1 resource set $DEVLINK_DEV path IPv4/fib size 10
+ devlink -N testns1 dev reload $DEVLINK_DEV
+
+ for lsb in $(seq 1 20); do
+ ip -n testns1 route add 192.0.2.${lsb}/32 dev dummy1 \
+ &> /dev/null
+ done
+
+ log_test "IPv4 error path - add"
+
+ ip -n testns1 link del dev dummy1
+}
+
+ipv4_error_path_replay()
+{
+ local lsb
+
+ RET=0
+
+ ip -n testns1 link add name dummy1 type dummy
+ ip -n testns1 link set dev dummy1 up
+
+ devlink -N testns1 resource set $DEVLINK_DEV path IPv4/fib size 100
+ devlink -N testns1 dev reload $DEVLINK_DEV
+
+ for lsb in $(seq 1 20); do
+ ip -n testns1 route add 192.0.2.${lsb}/32 dev dummy1
+ done
+
+ devlink -N testns1 resource set $DEVLINK_DEV path IPv4/fib size 10
+ devlink -N testns1 dev reload $DEVLINK_DEV &> /dev/null
+
+ log_test "IPv4 error path - replay"
+
+ ip -n testns1 link del dev dummy1
+
+ # Successfully reload after deleting all the routes.
+ devlink -N testns1 resource set $DEVLINK_DEV path IPv4/fib size 100
+ devlink -N testns1 dev reload $DEVLINK_DEV
+}
+
+ipv4_error_path()
+{
+ # Test the different error paths of the notifiers by limiting the size
+ # of the "IPv4/fib" resource.
+ ipv4_error_path_add
+ ipv4_error_path_replay
+}
+
+ipv4_flush()
+{
+ local metric
+
+ RET=0
+
+ ip -n testns1 link add name dummy1 type dummy
+ ip -n testns1 link set dev dummy1 up
+
+ # Exercise the routes flushing code paths by inserting various
+ # prefix routes on a netdev and then deleting it.
+ for metric in $(seq 1 20); do
+ ip -n testns1 route add 192.0.2.0/24 dev dummy1 metric $metric
+ done
+
+ ip -n testns1 link del dev dummy1
+
+ log_test "IPv4 routes flushing"
+}
+
+setup_prepare()
+{
+ local netdev
+
+ modprobe netdevsim &> /dev/null
+
+ echo "$DEV_ADDR 0" > ${NETDEVSIM_PATH}/new_device
+
+ if [ ! -d "${NETDEVSIM_PATH}/devices/${DEV}" ]; then
+ echo "Failed to create netdevsim device"
+ exit 1
+ fi
+
+ ip netns add testns1
+ if [ $? -ne 0 ]; then
+ echo "Failed to add netns \"testns1\""
+ exit 1
+ fi
+
+ devlink dev reload $DEVLINK_DEV netns testns1
+ if [ $? -ne 0 ]; then
+ echo "Failed to reload into netns \"testns1\""
+ exit 1
+ fi
+}
+
+cleanup()
+{
+ pre_cleanup
+ ip netns del testns1
+ echo "$DEV_ADDR" > ${NETDEVSIM_PATH}/del_device
+ modprobe -r netdevsim &> /dev/null
+}
+
+trap cleanup EXIT
+
+setup_prepare
+
+tests_run
+
+exit $EXIT_STATUS
--
2.21.0
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