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Message-Id: <20200119130100.3179857-13-idosch@idosch.org>
Date: Sun, 19 Jan 2020 15:00:57 +0200
From: Ido Schimmel <idosch@...sch.org>
To: netdev@...r.kernel.org
Cc: davem@...emloft.net, jiri@...lanox.com, amitc@...lanox.com,
mlxsw@...lanox.com, Ido Schimmel <idosch@...lanox.com>
Subject: [PATCH net-next 12/15] selftests: devlink_trap_tunnel_ipip: Add test case for decap_error
From: Amit Cohen <amitc@...lanox.com>
Test that the trap is triggered under the right conditions and that
devlink counters increase.
Signed-off-by: Amit Cohen <amitc@...lanox.com>
Acked-by: Jiri Pirko <jiri@...lanox.com>
Signed-off-by: Ido Schimmel <idosch@...lanox.com>
---
.../net/mlxsw/devlink_trap_tunnel_ipip.sh | 265 ++++++++++++++++++
1 file changed, 265 insertions(+)
create mode 100755 tools/testing/selftests/drivers/net/mlxsw/devlink_trap_tunnel_ipip.sh
diff --git a/tools/testing/selftests/drivers/net/mlxsw/devlink_trap_tunnel_ipip.sh b/tools/testing/selftests/drivers/net/mlxsw/devlink_trap_tunnel_ipip.sh
new file mode 100755
index 000000000000..039629bb92a3
--- /dev/null
+++ b/tools/testing/selftests/drivers/net/mlxsw/devlink_trap_tunnel_ipip.sh
@@ -0,0 +1,265 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+#
+# Test devlink-trap tunnel exceptions functionality over mlxsw.
+# Check all exception traps to make sure they are triggered under the right
+# conditions.
+
+# +-------------------------+
+# | H1 |
+# | $h1 + |
+# | 192.0.2.1/28 | |
+# +-------------------|-----+
+# |
+# +-------------------|-----+
+# | SW1 | |
+# | $swp1 + |
+# | 192.0.2.2/28 |
+# | |
+# | + g1a (gre) |
+# | loc=192.0.2.65 |
+# | rem=192.0.2.66 |
+# | tos=inherit |
+# | |
+# | + $rp1 |
+# | | 198.51.100.1/28 |
+# +--|----------------------+
+# |
+# +--|----------------------+
+# | | VRF2 |
+# | + $rp2 |
+# | 198.51.100.2/28 |
+# +-------------------------+
+
+lib_dir=$(dirname $0)/../../../net/forwarding
+
+ALL_TESTS="
+ decap_error_test
+"
+
+NUM_NETIFS=4
+source $lib_dir/lib.sh
+source $lib_dir/tc_common.sh
+source $lib_dir/devlink_lib.sh
+
+h1_create()
+{
+ simple_if_init $h1 192.0.2.1/28
+}
+
+h1_destroy()
+{
+ simple_if_fini $h1 192.0.2.1/28
+}
+
+vrf2_create()
+{
+ simple_if_init $rp2 198.51.100.2/28
+}
+
+vrf2_destroy()
+{
+ simple_if_fini $rp2 198.51.100.2/28
+}
+
+switch_create()
+{
+ __addr_add_del $swp1 add 192.0.2.2/28
+ tc qdisc add dev $swp1 clsact
+ ip link set dev $swp1 up
+
+ tunnel_create g1 gre 192.0.2.65 192.0.2.66 tos inherit
+ __addr_add_del g1 add 192.0.2.65/32
+ ip link set dev g1 up
+
+ __addr_add_del $rp1 add 198.51.100.1/28
+ ip link set dev $rp1 up
+}
+
+switch_destroy()
+{
+ ip link set dev $rp1 down
+ __addr_add_del $rp1 del 198.51.100.1/28
+
+ ip link set dev g1 down
+ __addr_add_del g1 del 192.0.2.65/32
+ tunnel_destroy g1
+
+ ip link set dev $swp1 down
+ tc qdisc del dev $swp1 clsact
+ __addr_add_del $swp1 del 192.0.2.2/28
+}
+
+setup_prepare()
+{
+ h1=${NETIFS[p1]}
+ swp1=${NETIFS[p2]}
+
+ rp1=${NETIFS[p3]}
+ rp2=${NETIFS[p4]}
+
+ forwarding_enable
+ vrf_prepare
+ h1_create
+ switch_create
+ vrf2_create
+}
+
+cleanup()
+{
+ pre_cleanup
+
+ vrf2_destroy
+ switch_destroy
+ h1_destroy
+ vrf_cleanup
+ forwarding_restore
+}
+
+ecn_payload_get()
+{
+ p=$(:
+ )"0"$( : GRE flags
+ )"0:00:"$( : Reserved + version
+ )"08:00:"$( : ETH protocol type
+ )"4"$( : IP version
+ )"5:"$( : IHL
+ )"00:"$( : IP TOS
+ )"00:14:"$( : IP total length
+ )"00:00:"$( : IP identification
+ )"20:00:"$( : IP flags + frag off
+ )"30:"$( : IP TTL
+ )"01:"$( : IP proto
+ )"E7:E6:"$( : IP header csum
+ )"C0:00:01:01:"$( : IP saddr : 192.0.1.1
+ )"C0:00:02:01:"$( : IP daddr : 192.0.2.1
+ )
+ echo $p
+}
+
+ecn_decap_test()
+{
+ local trap_name="decap_error"
+ local group_name="tunnel_drops"
+ local desc=$1; shift
+ local ecn_desc=$1; shift
+ local outer_tos=$1; shift
+ local mz_pid
+
+ RET=0
+
+ tc filter add dev $swp1 egress protocol ip pref 1 handle 101 \
+ flower src_ip 192.0.1.1 dst_ip 192.0.2.1 action pass
+
+ rp1_mac=$(mac_get $rp1)
+ rp2_mac=$(mac_get $rp2)
+ payload=$(ecn_payload_get)
+
+ ip vrf exec v$rp2 $MZ $rp2 -c 0 -d 1msec -a $rp2_mac -b $rp1_mac \
+ -A 192.0.2.66 -B 192.0.2.65 -t ip \
+ len=48,tos=$outer_tos,proto=47,p=$payload -q &
+
+ mz_pid=$!
+
+ devlink_trap_exception_test $trap_name $group_name
+
+ tc_check_packets "dev $swp1 egress" 101 0
+ check_err $? "Packets were not dropped"
+
+ log_test "$desc: Inner ECN is not ECT and outer is $ecn_desc"
+
+ kill $mz_pid && wait $mz_pid &> /dev/null
+ tc filter del dev $swp1 egress protocol ip pref 1 handle 101 flower
+}
+
+ipip_payload_get()
+{
+ local flags=$1; shift
+ local key=$1; shift
+
+ p=$(:
+ )"$flags"$( : GRE flags
+ )"0:00:"$( : Reserved + version
+ )"08:00:"$( : ETH protocol type
+ )"$key"$( : Key
+ )"4"$( : IP version
+ )"5:"$( : IHL
+ )"00:"$( : IP TOS
+ )"00:14:"$( : IP total length
+ )"00:00:"$( : IP identification
+ )"20:00:"$( : IP flags + frag off
+ )"30:"$( : IP TTL
+ )"01:"$( : IP proto
+ )"E7:E6:"$( : IP header csum
+ )"C0:00:01:01:"$( : IP saddr : 192.0.1.1
+ )"C0:00:02:01:"$( : IP daddr : 192.0.2.1
+ )
+ echo $p
+}
+
+no_matching_tunnel_test()
+{
+ local trap_name="decap_error"
+ local group_name="tunnel_drops"
+ local desc=$1; shift
+ local sip=$1; shift
+ local mz_pid
+
+ RET=0
+
+ tc filter add dev $swp1 egress protocol ip pref 1 handle 101 \
+ flower src_ip 192.0.1.1 dst_ip 192.0.2.1 action pass
+
+ rp1_mac=$(mac_get $rp1)
+ rp2_mac=$(mac_get $rp2)
+ payload=$(ipip_payload_get "$@")
+
+ ip vrf exec v$rp2 $MZ $rp2 -c 0 -d 1msec -a $rp2_mac -b $rp1_mac \
+ -A $sip -B 192.0.2.65 -t ip len=48,proto=47,p=$payload -q &
+ mz_pid=$!
+
+ devlink_trap_exception_test $trap_name $group_name
+
+ tc_check_packets "dev $swp1 egress" 101 0
+ check_err $? "Packets were not dropped"
+
+ log_test "$desc"
+
+ kill $mz_pid && wait $mz_pid &> /dev/null
+ tc filter del dev $swp1 egress protocol ip pref 1 handle 101 flower
+}
+
+decap_error_test()
+{
+ # Correct source IP - the remote address
+ local sip=192.0.2.66
+
+ ecn_decap_test "Decap error" "ECT(1)" 01
+ ecn_decap_test "Decap error" "ECT(0)" 02
+ ecn_decap_test "Decap error" "CE" 03
+
+ no_matching_tunnel_test "Decap error: Source IP check failed" \
+ 192.0.2.68 "0"
+ no_matching_tunnel_test \
+ "Decap error: Key exists but was not expected" $sip "2" ":E9:"
+
+ # Destroy the tunnel and create new one with key
+ __addr_add_del g1 del 192.0.2.65/32
+ tunnel_destroy g1
+
+ tunnel_create g1 gre 192.0.2.65 192.0.2.66 tos inherit key 233
+ __addr_add_del g1 add 192.0.2.65/32
+
+ no_matching_tunnel_test \
+ "Decap error: Key does not exist but was expected" $sip "0"
+ no_matching_tunnel_test \
+ "Decap error: Packet has a wrong key field" $sip "2" "E8:"
+}
+
+trap cleanup EXIT
+
+setup_prepare
+setup_wait
+tests_run
+
+exit $EXIT_STATUS
--
2.24.1
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