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libbpf: Add link-based API for netkit

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This adds bpf_program__attach_netkit() API to libbpf. Overall it is very
similar to tcx. The API looks as following:

  LIBBPF_API struct bpf_link *
  bpf_program__attach_netkit(const struct bpf_program *prog, int ifindex,
                             const struct bpf_netkit_opts *opts);

The struct bpf_netkit_opts is done in similar way as struct bpf_tcx_opts
for supporting bpf_mprog control parameters. The attach location for the
primary and peer device is derived from the program section "netkit/primary"
and "netkit/peer", respectively.

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Martin KaFai Lau <martin.lau@kernel.org>
Link: https://lore.kernel.org/r/20231024214904.29825-4-daniel@iogearbox.net
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
This commit is contained in:
Daniel Borkmann
2023-10-24 23:49:00 +02:00
committed by Andrii Nakryiko
parent cc7f085286
commit 2cb0236318
5 changed files with 76 additions and 0 deletions
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src/libbpf.map
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@@ -398,6 +398,7 @@ LIBBPF_1.3.0 {
bpf_object__unpin;
bpf_prog_detach_opts;
bpf_program__attach_netfilter;
bpf_program__attach_netkit;
bpf_program__attach_tcx;
bpf_program__attach_uprobe_multi;
ring__avail_data_size;