bpf: Enable retrieval of socket cookie for bind/post-bind hook
We currently make heavy use of the socket cookie in BPF's connect(), sendmsg() and recvmsg() hooks for load-balancing decisions. However, it is currently not enabled/implemented in BPF {post-}bind hooks where it can later be used in combination for correlation in the tc egress path, for example. Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/e9d71f310715332f12d238cc650c1edc5be55119.1585323121.git.daniel@iogearbox.net
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