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charset="utf-8" This patch implements the redundant BPF MPTCP scheduler, named bpf_red, which sends all packets redundantly on all available subflows. Signed-off-by: Geliang Tang --- .../selftests/bpf/progs/mptcp_bpf_red.c | 54 +++++++++++++++++++ 1 file changed, 54 insertions(+) create mode 100644 tools/testing/selftests/bpf/progs/mptcp_bpf_red.c diff --git a/tools/testing/selftests/bpf/progs/mptcp_bpf_red.c b/tools/test= ing/selftests/bpf/progs/mptcp_bpf_red.c new file mode 100644 index 000000000000..ea006a895cf1 --- /dev/null +++ b/tools/testing/selftests/bpf/progs/mptcp_bpf_red.c @@ -0,0 +1,54 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2022, SUSE. */ + +#include +#include "bpf_tcp_helpers.h" + +char _license[] SEC("license") =3D "GPL"; + +SEC("struct_ops/mptcp_sched_red_init") +void BPF_PROG(mptcp_sched_red_init, const struct mptcp_sock *msk) +{ +} + +SEC("struct_ops/mptcp_sched_red_release") +void BPF_PROG(mptcp_sched_red_release, const struct mptcp_sock *msk) +{ +} + +void BPF_STRUCT_OPS(bpf_red_get_subflow, const struct mptcp_sock *msk, + bool reinject, struct mptcp_sched_data *data) +{ + struct sock *ssk =3D data->contexts[0]->tcp_sock; + int i; + + if (reinject) { + data->sock =3D ssk; + data->call_again =3D 0; + return; + } + + for (i =3D 0; i < MPTCP_SUBFLOWS_MAX && i < data->subflows; i++) { + if (!msk->last_snd) + break; + + if (data->contexts[i]->tcp_sock =3D=3D msk->last_snd) { + if (i + 1 =3D=3D MPTCP_SUBFLOWS_MAX || !data->contexts[i + 1]) + break; + + ssk =3D data->contexts[i + 1]->tcp_sock; + break; + } + } + + data->sock =3D ssk; + data->call_again =3D i + 1 =3D=3D data->subflows ? 0 : 1; +} + +SEC(".struct_ops") +struct mptcp_sched_ops red =3D { + .init =3D (void *)mptcp_sched_red_init, + .release =3D (void *)mptcp_sched_red_release, + .get_subflow =3D (void *)bpf_red_get_subflow, + .name =3D "bpf_red", +}; --=20 2.34.1