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selftests: devlink_trap_tunnel_ipip: Add test case for decap_error
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Test that the trap is triggered under the right conditions and that
devlink counters increase.

Signed-off-by: Amit Cohen <amitc@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Amit Cohen authored and David S. Miller committed Jan 19, 2020
1 parent ca264ef commit 27942c7
Showing 1 changed file with 265 additions and 0 deletions.
265 changes: 265 additions & 0 deletions tools/testing/selftests/drivers/net/mlxsw/devlink_trap_tunnel_ipip.sh
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#!/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

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