Commit bcece5dc authored by David Ahern's avatar David Ahern Committed by Alexei Starovoitov
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bpf: Change bpf_fib_lookup to return -EAFNOSUPPORT for unsupported address families 



Update bpf_fib_lookup to return -EAFNOSUPPORT for unsupported address
families. Allows userspace to probe for support as more are added
(e.g., AF_MPLS).

Signed-off-by: default avatarDavid Ahern <dsahern@gmail.com>
Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
parent 71b2c87d

net/core/filter.c

+2 −2
Original line number Diff line number Diff line
@@ -4285,7 +4285,7 @@ BPF_CALL_4(bpf_xdp_fib_lookup, struct xdp_buff *, ctx, 
					   flags, true);

#endif

	}

	return 0;

	return -EAFNOSUPPORT;

}



static const struct bpf_func_proto bpf_xdp_fib_lookup_proto = {
@@ -4302,7 +4302,7 @@ BPF_CALL_4(bpf_skb_fib_lookup, struct sk_buff *, skb, 
	   struct bpf_fib_lookup *, params, int, plen, u32, flags)

{

	struct net *net = dev_net(skb->dev);

	int index = 0;

	int index = -EAFNOSUPPORT;



	if (plen < sizeof(*params))

		return -EINVAL;