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[34.145.139.141]) by smtp.gmail.com with ESMTPSA id 6a1803df08f44-6f2c2c21cccsm34333676d6.106.2025.04.20.11.05.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 20 Apr 2025 11:05:40 -0700 (PDT) From: Willem de Bruijn To: netdev@vger.kernel.org Cc: davem@davemloft.net, kuba@kernel.org, edumazet@google.com, pabeni@redhat.com, dsahern@kernel.org, horms@kernel.org, idosch@nvidia.com, kuniyu@amazon.com, Willem de Bruijn Subject: [PATCH net-next 0/3] ip: improve tcp sock multipath routing Date: Sun, 20 Apr 2025 14:04:28 -0400 Message-ID: <20250420180537.2973960-1-willemdebruijn.kernel@gmail.com> X-Mailer: git-send-email 2.49.0.805.g082f7c87e0-goog Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Willem de Bruijn Improve layer 4 multipath hash policy for local tcp connections: patch 1: Select a source address that matches the nexthop device. Due to tcp_v4_connect making separate route lookups for saddr and route, the two can currently be inconsistent. patch 2: Use all paths when opening multiple local tcp connections to the same ip address and port. patch 3: Test the behavior of patch 2. Extend the fib_nexthops.sh testsuite with one opening many connections, and count SYNs on both egress devices. Willem de Bruijn (3): ipv4: prefer multipath nexthop that matches source address ip: load balance tcp connections to single dst addr and port selftests/net: test tcp connection load balancing include/net/flow.h | 1 + include/net/ip_fib.h | 3 +- include/net/route.h | 3 + net/ipv4/fib_semantics.c | 39 ++++++---- net/ipv4/route.c | 15 +++- net/ipv6/route.c | 13 +++- net/ipv6/tcp_ipv6.c | 2 + tools/testing/selftests/net/fib_nexthops.sh | 83 +++++++++++++++++++++ 8 files changed, 137 insertions(+), 22 deletions(-) -- 2.49.0.805.g082f7c87e0-goog