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Thu, 26 Feb 2026 12:02:59 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id uPPKEHM2oGktfQAAD6G6ig (envelope-from ); Thu, 26 Feb 2026 12:02:59 +0000 From: Fernando Fernandez Mancera To: netdev@vger.kernel.org Cc: linux-kselftest@vger.kernel.org, shuah@kernel.org, horms@kernel.org, pabeni@redhat.com, kuba@kernel.org, edumazet@google.com, davem@davemloft.net, Fernando Fernandez Mancera Subject: [PATCH net-next v2] selftests: net: add ipv6 RA route to ECMP merge test Date: Thu, 26 Feb 2026 13:02:37 +0100 Message-ID: <20260226120237.5352-1-fmancera@suse.de> X-Mailer: git-send-email 2.51.0 Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Spam-Score: -2.80 X-Spam-Level: X-Spamd-Result: default: False [-2.80 / 50.00]; BAYES_HAM(-3.00)[100.00%]; NEURAL_HAM_LONG(-1.00)[-1.000]; MID_CONTAINS_FROM(1.00)[]; R_MISSING_CHARSET(0.50)[]; NEURAL_HAM_SHORT(-0.20)[-1.000]; MIME_GOOD(-0.10)[text/plain]; TO_MATCH_ENVRCPT_ALL(0.00)[]; ARC_NA(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; FROM_HAS_DN(0.00)[]; MIME_TRACE(0.00)[0:+]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.de:mid,suse.de:email,imap1.dmz-prg2.suse.org:helo]; FUZZY_RATELIMITED(0.00)[rspamd.com]; RCPT_COUNT_SEVEN(0.00)[9]; RCVD_COUNT_TWO(0.00)[2]; FROM_EQ_ENVFROM(0.00)[]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; TO_DN_SOME(0.00)[]; RCVD_TLS_ALL(0.00)[] X-Spam-Flag: NO As commit bbf4a17ad9ff ("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 --- v2: added CONFIG_IPV6_ROUTE_INFO to the config --- tools/testing/selftests/net/config | 1 + tools/testing/selftests/net/fib_tests.sh | 17 +++++++++++++++++ 2 files changed, 18 insertions(+) diff --git a/tools/testing/selftests/net/config b/tools/testing/selftests/net/config index cd49b7dfe216..69e22bde0fdb 100644 --- a/tools/testing/selftests/net/config +++ b/tools/testing/selftests/net/config @@ -43,6 +43,7 @@ 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_RPL_LWTUNNEL=y CONFIG_IPV6_SEG6_LWTUNNEL=y CONFIG_IPV6_SIT=y diff --git a/tools/testing/selftests/net/fib_tests.sh b/tools/testing/selftests/net/fib_tests.sh index c5694cc4ddd2..1262ee1ea09b 100755 --- a/tools/testing/selftests/net/fib_tests.sh +++ b/tools/testing/selftests/net/fib_tests.sh @@ -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 -- 2.53.0