xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

net: add confirm_neigh method to dst_ops

Browse Source 
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>
This commit is contained in:
Julian Anastasov
2017-02-06 23:14:15 +02:00
committed by David S. Miller
parent c3a2e83705
commit 63fca65d08
7 changed files with 96 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

19
net/xfrm/xfrm_policy.c
View File

@@ -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);