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selftests: net: add ipv6 RA route to ECMP merge test

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As commit bbf4a17ad9 ("ipv6: Fix ECMP sibling count mismatch when
clearing RTF_ADDRCONF") pointed out, RA routes are not elegible for ECMP
merging.

Add a test scenario mixing RA and static routes with gateway to check
that they are not getting merged.

Signed-off-by: Fernando Fernandez Mancera <fmancera@suse.de>
Link: https://patch.msgid.link/20260313124827.3945-1-fmancera@suse.de
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This commit is contained in:
Fernando Fernandez Mancera 2026-03-13 13:48:27 +01:00 committed by Paolo Abeni
parent febe801245
commit fdd973148a
2 changed files with 19 additions and 0 deletions
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2
tools/testing/selftests/net/config
View File

@ -43,6 +43,8 @@ CONFIG_IPV6_ILA=m
CONFIG_IPV6_IOAM6_LWTUNNEL=y
CONFIG_IPV6_MROUTE=y
CONFIG_IPV6_MULTIPLE_TABLES=y
CONFIG_IPV6_ROUTE_INFO=y
CONFIG_IPV6_ROUTER_PREF=y
CONFIG_IPV6_RPL_LWTUNNEL=y
CONFIG_IPV6_SEG6_LWTUNNEL=y
CONFIG_IPV6_SIT=y

17
tools/testing/selftests/net/fib_tests.sh
View File

@ -1534,6 +1534,23 @@ fib6_ra_to_static()
log_test $ret 0 "ipv6 promote RA route to static"
# Prepare for RA route with gateway
$NS_EXEC sysctl -wq net.ipv6.conf.veth1.accept_ra_rt_info_max_plen=64
# Add initial route to cause ECMP merging
$IP -6 route add 2001:12::/64 via fe80::dead:beef dev veth1
$NS_EXEC ra6 -i veth2 -d 2001:10::1 -R 2001:12::/64#1#120
# Routes are not merged as RA routes are not elegible for ECMP
check_rt_num 2 "$($IP -6 route list | grep -c "2001:12::/64 via")"
$IP -6 route append 2001:12::/64 via fe80::dead:feeb dev veth1
check_rt_num 2 "$($IP -6 route list | grep -c "nexthop via")"
log_test "$ret" 0 "ipv6 RA route with nexthop do not merge into ECMP with static"
set +e
cleanup &> /dev/null