diff options
| author | Julian Anastasov | 2017-02-06 23:14:15 +0200 |
|---|---|---|
| committer | David S. Miller | 2017-02-07 13:07:46 -0500 |
| commit | 63fca65d08632fbec9d9b655f671cf08aa1aeeb8 (patch) | |
| tree | 103ac18cddcdf911a8589f52fbcefb7140411a51 /net/xfrm | |
| parent | c3a2e8370534f810cac6050169db0ed3e0f94f0b (diff) | |
net: add confirm_neigh method to dst_ops
Add confirm_neigh method to dst_ops and use it from IPv4 and IPv6
to lookup and confirm the neighbour. Its usage via the new helper
dst_confirm_neigh() should be restricted to MSG_PROBE users for
performance reasons.
For XFRM prefer the last tunnel address, if present. With help
from Steffen Klassert.
Signed-off-by: Julian Anastasov <ja@ssi.bg>
Acked-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/xfrm')
| -rw-r--r-- | net/xfrm/xfrm_policy.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c index 99ad1af2927f..0a0f63d3cc96 100644 --- a/net/xfrm/xfrm_policy.c +++ b/net/xfrm/xfrm_policy.c @@ -2856,6 +2856,23 @@ static struct neighbour *xfrm_neigh_lookup(const struct dst_entry *dst, return dst->path->ops->neigh_lookup(dst, skb, daddr); } +static void xfrm_confirm_neigh(const struct dst_entry *dst, const void *daddr) +{ + const struct dst_entry *path = dst->path; + + for (; dst != path; dst = dst->child) { + const struct xfrm_state *xfrm = dst->xfrm; + + if (xfrm->props.mode == XFRM_MODE_TRANSPORT) + continue; + if (xfrm->type->flags & XFRM_TYPE_REMOTE_COADDR) + daddr = xfrm->coaddr; + else if (!(xfrm->type->flags & XFRM_TYPE_LOCAL_COADDR)) + daddr = &xfrm->id.daddr; + } + path->ops->confirm_neigh(path, daddr); +} + int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo) { int err = 0; @@ -2882,6 +2899,8 @@ int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo) dst_ops->link_failure = xfrm_link_failure; if (likely(dst_ops->neigh_lookup == NULL)) dst_ops->neigh_lookup = xfrm_neigh_lookup; + if (likely(!dst_ops->confirm_neigh)) + dst_ops->confirm_neigh = xfrm_confirm_neigh; if (likely(afinfo->garbage_collect == NULL)) afinfo->garbage_collect = xfrm_garbage_collect_deferred; rcu_assign_pointer(xfrm_policy_afinfo[afinfo->family], afinfo); |