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Add mptcp-bpf-bkup

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Ycarus (Yannick Chabanois) 2024-06-11 20:06:20 +02:00
parent 0dd39de544
commit ec805f7cda
4 changed files with 866 additions and 0 deletions
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51
mptcp-bpf-bkup/src/mptcp_bpf_bkup.c Normal file
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// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2022, SUSE. */
#include <linux/bpf.h>
#include <limits.h>
#include "bpf_tcp_helpers.h"
char _license[] SEC("license") = "GPL";
SEC("struct_ops/mptcp_sched_bkup_init")
void BPF_PROG(mptcp_sched_bkup_init, struct mptcp_sock *msk)
{
}
SEC("struct_ops/mptcp_sched_bkup_release")
void BPF_PROG(mptcp_sched_bkup_release, struct mptcp_sock *msk)
{
}
int BPF_STRUCT_OPS(bpf_bkup_get_subflow, struct mptcp_sock *msk,
struct mptcp_sched_data *data)
{
int nr = -1;
for (int i = 0; i < data->subflows && i < MPTCP_SUBFLOWS_MAX; i++) {
struct mptcp_subflow_context *subflow;
subflow = bpf_mptcp_subflow_ctx_by_pos(data, i);
if (!subflow)
break;
if (!BPF_CORE_READ_BITFIELD_PROBED(subflow, backup)) {
nr = i;
break;
}
}
if (nr != -1) {
mptcp_subflow_set_scheduled(bpf_mptcp_subflow_ctx_by_pos(data, nr), true);
return -1;
}
return 0;
}
SEC(".struct_ops")
struct mptcp_sched_ops bkup = {
.init = (void *)mptcp_sched_bkup_init,
.release = (void *)mptcp_sched_bkup_release,
.get_subflow = (void *)bpf_bkup_get_subflow,
.name = "bpf_bkup",
};