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charset="utf-8" This patch implements the simplest MPTCP scheduler, named bpf_first, which always picks the first subflow to send data. It's a sample of MPTCP BPF scheduler implementations. Acked-by: Paolo Abeni Reviewed-by: Mat Martineau Signed-off-by: Geliang Tang --- .../selftests/bpf/progs/mptcp_bpf_first.c | 32 +++++++++++++++++++ 1 file changed, 32 insertions(+) create mode 100644 tools/testing/selftests/bpf/progs/mptcp_bpf_first.c diff --git a/tools/testing/selftests/bpf/progs/mptcp_bpf_first.c b/tools/te= sting/selftests/bpf/progs/mptcp_bpf_first.c new file mode 100644 index 000000000000..fd67b5f42964 --- /dev/null +++ b/tools/testing/selftests/bpf/progs/mptcp_bpf_first.c @@ -0,0 +1,32 @@ +// 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_first_init") +void BPF_PROG(mptcp_sched_first_init, const struct mptcp_sock *msk) +{ +} + +SEC("struct_ops/mptcp_sched_first_release") +void BPF_PROG(mptcp_sched_first_release, const struct mptcp_sock *msk) +{ +} + +void BPF_STRUCT_OPS(bpf_first_get_subflow, const struct mptcp_sock *msk, + bool reinject, struct mptcp_sched_data *data) +{ + data->sock =3D msk->first; + data->call_again =3D 0; +} + +SEC(".struct_ops") +struct mptcp_sched_ops first =3D { + .init =3D (void *)mptcp_sched_first_init, + .release =3D (void *)mptcp_sched_first_release, + .get_subflow =3D (void *)bpf_first_get_subflow, + .name =3D "bpf_first", +}; --=20 2.34.1