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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: David Ahern <dsahern@gmail.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
David Ahern 2018-05-30 12:24:17 -07:00 committed by Alexei Starovoitov
parent 71b2c87df3
commit bcece5dc40
1 changed files with 2 additions and 2 deletions
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4
net/core/filter.c
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@ -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;