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Date: Fri, 21 Aug 2020 17:15:38 +0200 From: Nicolas Rybowski <nicolas.rybowski@...sares.net> To: Alexei Starovoitov <ast@...nel.org>, Andrii Nakryiko <andriin@...com>, Daniel Borkmann <daniel@...earbox.net>, "David S. Miller" <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>, John Fastabend <john.fastabend@...il.com>, KP Singh <kpsingh@...omium.org>, Martin KaFai Lau <kafai@...com>, Mat Martineau <mathew.j.martineau@...ux.intel.com>, Matthieu Baerts <matthieu.baerts@...sares.net>, Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com> Cc: Nicolas Rybowski <nicolas.rybowski@...sares.net>, bpf@...r.kernel.org, linux-kernel@...r.kernel.org, mptcp@...ts.01.org, netdev@...r.kernel.org Subject: [PATCH bpf-next 0/3] bpf: add MPTCP subflow support 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 -- 2.28.0
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