From patchwork Wed May 29 13:04:29 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lorenzo Bianconi X-Patchwork-Id: 13678813 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3CD72748D; Wed, 29 May 2024 13:04:43 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716987884; cv=none; b=LgrYVsCPL/DaANkglgxtiZnhkqTxRPaxBJ+C1am6eTV+TMjVKZ1j9zjRDVqSmik3Lipn48bnw7ysvIqCXkRJ+pJWu9rh33YNjjY9dBKDCKrytGUMpSD1EM7JjX0Rfi7KohbGbATsnbNcxWiA6f6bqaNWnx8bPs4mst/28rqWoCk= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716987884; c=relaxed/simple; bh=/JmrtSSabh4sHnn3D2MtOAexutK1tQy/JLlskSAIqRQ=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=t+c4CyfpaPg6h8HOOGTaPbEw2nNTb1VhqWw8ms5F8rpadD9HnWzV2PwWE6UY37N77LA8vl9kvGn7gv18XBlY435mmJnM0tOYb60ehU0swbDrT/jHPSCh0nay4ufqUjnFoWuEknXoWpc0r7H74Y6a3Qy0pEjfBhp+Weosv5e5qAA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=uZ+lFrTF; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="uZ+lFrTF" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 47E13C2BD10; Wed, 29 May 2024 13:04:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1716987883; bh=/JmrtSSabh4sHnn3D2MtOAexutK1tQy/JLlskSAIqRQ=; h=From:To:Cc:Subject:Date:From; b=uZ+lFrTFSo81jbIYXnpRft8oSLDSwRnqrjUXMxrhYOzddRP7vn63GxKldmVieEhMf MOEpU5TFKGqkbDWvlfqQdTuIPJH4oNfQx7jTsTSfARQ7TIwuQnNKkBfmtzddeGiSGR EL2p9F6KquyJjiMQj0DGN/Dk3Nby/2+/K5tLUcbEhSgMnGdjUMDdkjEPLItqcjwjrG yuMWo6EkmTij8EeRvjOFhBFkMY+WKbRY7KdJiCK3kEekPL6Lh7MIPGQfaKUUke90R0 9qsbXFWNwVHCdL3KI7lJx0vZ2SPmDgjZbWOs8EO96tHTDTWwbQ2M/iMbWmP7e8PLo+ diReGTKG8t0VA== From: Lorenzo Bianconi To: bpf@vger.kernel.org Cc: pablo@netfilter.org, kadlec@netfilter.org, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, netfilter-devel@vger.kernel.org, netdev@vger.kernel.org, ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org, martin.lau@linux.dev, eddyz87@gmail.com, lorenzo.bianconi@redhat.com, toke@redhat.com, fw@strlen.de, hawk@kernel.org, horms@kernel.org, donhunte@redhat.com, memxor@gmail.com Subject: [PATCH v4 bpf-next 0/3] netfilter: Add the capability to offload flowtable in XDP layer Date: Wed, 29 May 2024 15:04:29 +0200 Message-ID: X-Mailer: git-send-email 2.45.1 Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Patchwork-Delegate: bpf@iogearbox.net Introduce bpf_xdp_flow_lookup kfunc in order to perform the lookup of a given flowtable entry based on the fib tuple of incoming traffic. bpf_xdp_flow_lookup can be used as building block to offload in XDP the sw flowtable processing when the hw support is not available. This series has been tested running the xdp_flowtable_offload eBPF program on an ixgbe 10Gbps NIC (eno2) in order to XDP_REDIRECT the TCP traffic to a veth pair (veth0-veth1) based on the content of the nf_flowtable as soon as the TCP connection is in the established state: [tcp client] (eno1) == LAN == (eno2) xdp_flowtable_offload [XDP_REDIRECT] --> veth0 == veth1 [tcp server] table inet filter { flowtable ft { hook ingress priority filter devices = { eno2, veth0 } } chain forward { type filter hook forward priority filter meta l4proto { tcp, udp } flow add @ft } } - sw flowtable [1 TCP stream, T = 300s]: ~ 6.2 Gbps - xdp flowtable [1 TCP stream, T = 300s]: ~ 7.6 Gbps - sw flowtable [3 TCP stream, T = 300s]: ~ 7.7 Gbps - xdp flowtable [3 TCP stream, T = 300s]: ~ 8.8 Gbps Changes since v3: - move flowtable map utilities in nf_flow_table_xdp.c Changes since v2: - introduce bpf_flowtable_opts struct in bpf_xdp_flow_lookup signature - get rid of xdp_flowtable_offload bpf sample - get rid of test_xdp_flowtable.sh for selftest and rely on prog_tests instead - rename bpf_xdp_flow_offload_lookup in bpf_xdp_flow_lookup Changes since v1: - return NULL in bpf_xdp_flow_offload_lookup kfunc in case of error - take into account kfunc registration possible failures Changes since RFC: - fix compilation error if BTF is not enabled Florian Westphal (1): netfilter: nf_tables: add flowtable map for xdp offload Lorenzo Bianconi (2): netfilter: add bpf_xdp_flow_lookup kfunc selftests/bpf: Add selftest for bpf_xdp_flow_lookup kfunc include/net/netfilter/nf_flow_table.h | 18 ++ net/netfilter/Makefile | 7 +- net/netfilter/nf_flow_table_bpf.c | 117 ++++++++++++ net/netfilter/nf_flow_table_inet.c | 2 +- net/netfilter/nf_flow_table_offload.c | 6 +- net/netfilter/nf_flow_table_xdp.c | 163 +++++++++++++++++ tools/testing/selftests/bpf/config | 13 ++ .../selftests/bpf/prog_tests/xdp_flowtable.c | 168 ++++++++++++++++++ .../selftests/bpf/progs/xdp_flowtable.c | 145 +++++++++++++++ 9 files changed, 635 insertions(+), 4 deletions(-) create mode 100644 net/netfilter/nf_flow_table_bpf.c create mode 100644 net/netfilter/nf_flow_table_xdp.c create mode 100644 tools/testing/selftests/bpf/prog_tests/xdp_flowtable.c create mode 100644 tools/testing/selftests/bpf/progs/xdp_flowtable.c