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ipv6: Add neighbor helpers that use the ipv6 stub

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Add ipv6 helpers to handle ndisc references via the stub. Update
bpf_ipv6_fib_lookup to use __ipv6_neigh_lookup_noref_stub instead of
the open code ___neigh_lookup_noref with the stub.

Signed-off-by: David Ahern <dsahern@gmail.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David Ahern
2019-04-05 16:30:25 -07:00
committed by David S. Miller
parent 1aefd3de7b
commit 71df5777aa
2 changed files with 42 additions and 4 deletions
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6
net/core/filter.c
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@@ -4759,11 +4759,9 @@ static int bpf_ipv6_fib_lookup(struct net *net, struct bpf_fib_lookup *params,
params->rt_metric = f6i->fib6_metric;
/* xdp and cls_bpf programs are run in RCU-bh so rcu_read_lock_bh is
* not needed here. Can not use __ipv6_neigh_lookup_noref here
* because we need to get nd_tbl via the stub
* not needed here.
*/
neigh = ___neigh_lookup_noref(ipv6_stub->nd_tbl, neigh_key_eq128,
ndisc_hashfn, dst, dev);
neigh = __ipv6_neigh_lookup_noref_stub(dev, dst);
if (!neigh)
return BPF_FIB_LKUP_RET_NO_NEIGH;