bpf: introduce new program type for skbs on sockets
A class of programs, run from strparser and soon from a new map type called sock map, are used with skb as the context but on established sockets. By creating a specific program type for these we can use bpf helpers that expect full sockets and get the verifier to ensure these helpers are not used out of context. The new type is BPF_PROG_TYPE_SK_SKB. This patch introduces the infrastructure and type. Signed-off-by: NJohn Fastabend <john.fastabend@gmail.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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