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Message-ID: <20251224161801.824589-2-idosch@nvidia.com>
Date: Wed, 24 Dec 2025 18:18:01 +0200
From: Ido Schimmel <idosch@...dia.com>
To: <netdev@...r.kernel.org>
CC: <davem@...emloft.net>, <kuba@...nel.org>, <pabeni@...hat.com>,
<edumazet@...gle.com>, <dsahern@...nel.org>, <horms@...nel.org>, Ido Schimmel
<idosch@...dia.com>
Subject: [RFC PATCH net-next 2/2] selftests: fib_tests: Add test cases for route lookup with oif
Test that both address families respect the oif parameter when a
matching multipath route is found, regardless of the presence of a
source address.
Output without "ipv6: Honor oif when choosing nexthop for locally
generated traffic":
# ./fib_tests.sh -t "ipv4_mpath_oif ipv6_mpath_oif"
IPv4 multipath oif test
TEST: IPv4 multipath via first nexthop [ OK ]
TEST: IPv4 multipath via second nexthop [ OK ]
TEST: IPv4 multipath via first nexthop with source address [ OK ]
TEST: IPv4 multipath via second nexthop with source address [ OK ]
IPv6 multipath oif test
TEST: IPv6 multipath via first nexthop [ OK ]
TEST: IPv6 multipath via second nexthop [ OK ]
TEST: IPv6 multipath via first nexthop with source address [FAIL]
TEST: IPv6 multipath via second nexthop with source address [FAIL]
Tests passed: 6
Tests failed: 2
Output with "ipv6: Honor oif when choosing nexthop for locally generated
traffic":
# ./fib_tests.sh -t "ipv4_mpath_oif ipv6_mpath_oif"
IPv4 multipath oif test
TEST: IPv4 multipath via first nexthop [ OK ]
TEST: IPv4 multipath via second nexthop [ OK ]
TEST: IPv4 multipath via first nexthop with source address [ OK ]
TEST: IPv4 multipath via second nexthop with source address [ OK ]
IPv6 multipath oif test
TEST: IPv6 multipath via first nexthop [ OK ]
TEST: IPv6 multipath via second nexthop [ OK ]
TEST: IPv6 multipath via first nexthop with source address [ OK ]
TEST: IPv6 multipath via second nexthop with source address [ OK ]
Tests passed: 8
Tests failed: 0
Signed-off-by: Ido Schimmel <idosch@...dia.com>
---
tools/testing/selftests/net/fib_tests.sh | 108 ++++++++++++++++++++++-
1 file changed, 107 insertions(+), 1 deletion(-)
diff --git a/tools/testing/selftests/net/fib_tests.sh b/tools/testing/selftests/net/fib_tests.sh
index a88f797c549a..8ae0adbcafe9 100755
--- a/tools/testing/selftests/net/fib_tests.sh
+++ b/tools/testing/selftests/net/fib_tests.sh
@@ -12,7 +12,7 @@ TESTS="unregister down carrier nexthop suppress ipv6_notify ipv4_notify \
ipv4_route_metrics ipv4_route_v6_gw rp_filter ipv4_del_addr \
ipv6_del_addr ipv4_mangle ipv6_mangle ipv4_bcast_neigh fib6_gc_test \
ipv4_mpath_list ipv6_mpath_list ipv4_mpath_balance ipv6_mpath_balance \
- fib6_ra_to_static"
+ ipv4_mpath_oif ipv6_mpath_oif fib6_ra_to_static"
VERBOSE=0
PAUSE_ON_FAIL=no
@@ -2776,6 +2776,110 @@ ipv6_mpath_balance_test()
forwarding_cleanup
}
+ipv4_mpath_oif_test_common()
+{
+ local get_param=$1; shift
+ local expected_oif=$1; shift
+ local test_name=$1; shift
+ local tmp_file
+
+ tmp_file=$(mktemp)
+
+ for i in {1..100}; do
+ $IP route get 203.0.113.${i} $get_param >> "$tmp_file"
+ done
+
+ [[ $(grep "$expected_oif" "$tmp_file" | wc -l) -eq 100 ]]
+ log_test $? 0 "$test_name"
+
+ rm "$tmp_file"
+}
+
+ipv4_mpath_oif_test()
+{
+ echo
+ echo "IPv4 multipath oif test"
+
+ setup
+
+ set -e
+ $IP link add dummy1 type dummy
+ $IP link set dev dummy1 up
+ $IP address add 192.0.2.1/28 dev dummy1
+ $IP address add 192.0.2.17/32 dev lo
+
+ $IP route add 203.0.113.0/24 \
+ nexthop via 198.51.100.2 dev dummy0 \
+ nexthop via 192.0.2.2 dev dummy1
+ set +e
+
+ ipv4_mpath_oif_test_common "oif dummy0" "dummy0" \
+ "IPv4 multipath via first nexthop"
+
+ ipv4_mpath_oif_test_common "oif dummy1" "dummy1" \
+ "IPv4 multipath via second nexthop"
+
+ ipv4_mpath_oif_test_common "oif dummy0 from 192.0.2.17" "dummy0" \
+ "IPv4 multipath via first nexthop with source address"
+
+ ipv4_mpath_oif_test_common "oif dummy1 from 192.0.2.17" "dummy1" \
+ "IPv4 multipath via second nexthop with source address"
+
+ cleanup
+}
+
+ipv6_mpath_oif_test_common()
+{
+ local get_param=$1; shift
+ local expected_oif=$1; shift
+ local test_name=$1; shift
+ local tmp_file
+
+ tmp_file=$(mktemp)
+
+ for i in {1..100}; do
+ $IP route get 2001:db8:10::${i} $get_param >> "$tmp_file"
+ done
+
+ [[ $(grep "$expected_oif" "$tmp_file" | wc -l) -eq 100 ]]
+ log_test $? 0 "$test_name"
+
+ rm "$tmp_file"
+}
+
+ipv6_mpath_oif_test()
+{
+ echo
+ echo "IPv6 multipath oif test"
+
+ setup
+
+ set -e
+ $IP link add dummy1 type dummy
+ $IP link set dev dummy1 up
+ $IP address add 2001:db8:2::1/64 dev dummy1
+ $IP address add 2001:db8:100::1/128 dev lo
+
+ $IP route add 2001:db8:10::/64 \
+ nexthop via 2001:db8:1::2 dev dummy0 \
+ nexthop via 2001:db8:2::2 dev dummy1
+ set +e
+
+ ipv6_mpath_oif_test_common "oif dummy0" "dummy0" \
+ "IPv6 multipath via first nexthop"
+
+ ipv6_mpath_oif_test_common "oif dummy1" "dummy1" \
+ "IPv6 multipath via second nexthop"
+
+ ipv6_mpath_oif_test_common "oif dummy0 from 2001:db8:100::1" "dummy0" \
+ "IPv6 multipath via first nexthop with source address"
+
+ ipv6_mpath_oif_test_common "oif dummy1 from 2001:db8:100::1" "dummy1" \
+ "IPv6 multipath via second nexthop with source address"
+
+ cleanup
+}
+
################################################################################
# usage
@@ -2861,6 +2965,8 @@ do
ipv6_mpath_list) ipv6_mpath_list_test;;
ipv4_mpath_balance) ipv4_mpath_balance_test;;
ipv6_mpath_balance) ipv6_mpath_balance_test;;
+ ipv4_mpath_oif) ipv4_mpath_oif_test;;
+ ipv6_mpath_oif) ipv6_mpath_oif_test;;
fib6_ra_to_static) fib6_ra_to_static;;
help) echo "Test names: $TESTS"; exit 0;;
--
2.52.0
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