Andrii Nakryiko 026a4c28e1 bpf, xdp: Implement LINK_UPDATE for BPF XDP link
Add support for LINK_UPDATE command for BPF XDP link to enable reliable
replacement of underlying BPF program.

Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20200722064603.3350758-6-andriin@fb.com
2020-07-25 20:37:02 -07:00
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