bpf: sockmap, support for msg_peek in sk_msg with redirect ingress
This adds support for the MSG_PEEK flag when doing redirect to ingress and receiving on the sk_msg psock queue. Previously the flag was being ignored which could confuse applications if they expected the flag to work as normal. Signed-off-by: John Fastabend <john.fastabend@gmail.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
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