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[81.242.60.223]) by smtp.gmail.com with ESMTPSA id qp16sm1482709ejb.89.2020.08.21.08.18.04 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 21 Aug 2020 08:18:05 -0700 (PDT) From: Nicolas Rybowski To: Alexei Starovoitov , Andrii Nakryiko , Daniel Borkmann , "David S. Miller" , Jakub Kicinski , John Fastabend , KP Singh , Martin KaFai Lau , Mat Martineau , Matthieu Baerts , Song Liu , Yonghong Song Cc: Nicolas Rybowski , bpf@vger.kernel.org, linux-kernel@vger.kernel.org, mptcp@lists.01.org, netdev@vger.kernel.org Subject: [PATCH bpf-next 0/3] bpf: add MPTCP subflow support Date: Fri, 21 Aug 2020 17:15:38 +0200 Message-Id: <20200821151544.1211989-1-nicolas.rybowski@tessares.net> X-Mailer: git-send-email 2.28.0 MIME-Version: 1.0 Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Previously it was not possible to make a distinction between plain TCP sockets and MPTCP subflow sockets on the BPF_PROG_TYPE_SOCK_OPS hook. This patch series now enables a fine control of subflow sockets. In its current state, it allows to put different sockopt on each subflow from a same MPTCP connection (socket mark, TCP congestion algorithm, ...) using BPF programs. It should also be the basis of exposing MPTCP-specific fields through BPF. Nicolas Rybowski (3): bpf: expose is_mptcp flag to bpf_tcp_sock mptcp: attach subflow socket to parent cgroup bpf: add 'bpf_mptcp_sock' structure and helper include/linux/bpf.h | 33 ++++++++++++++++ include/uapi/linux/bpf.h | 14 +++++++ kernel/bpf/verifier.c | 30 ++++++++++++++ net/core/filter.c | 13 +++++- net/mptcp/Makefile | 2 + net/mptcp/bpf.c | 72 ++++++++++++++++++++++++++++++++++ net/mptcp/subflow.c | 27 +++++++++++++ scripts/bpf_helpers_doc.py | 2 + tools/include/uapi/linux/bpf.h | 14 +++++++ 9 files changed, 206 insertions(+), 1 deletion(-) create mode 100644 net/mptcp/bpf.c