Martin KaFai Lau aa65d6960a
bpf: Add state, dst_ip4, dst_ip6 and dst_port to bpf_sock ...
This patch adds "state", "dst_ip4", "dst_ip6" and "dst_port" to the
bpf_sock. The userspace has already been using "state",
e.g. inet_diag (ss -t) and getsockopt(TCP_INFO).
This patch also allows narrow load on the following existing fields:
"family", "type", "protocol" and "src_port". Unlike IP address,
the load offset is resticted to the first byte for them but it
can be relaxed later if there is a use case.
This patch also folds __sock_filter_check_size() into
bpf_sock_is_valid_access() since it is not called
by any where else. All bpf_sock checking is in
one place.
Signed-off-by: Martin KaFai Lau <kafai@fb.com >
Signed-off-by: Alexei Starovoitov <ast@kernel.org >
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