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-rw-r--r--include/net/arp.h1
-rw-r--r--net/ipv4/arp.c29
2 files changed, 19 insertions, 11 deletions
diff --git a/include/net/arp.h b/include/net/arp.h
index f4cf6ce66586..91f0568a04ef 100644
--- a/include/net/arp.h
+++ b/include/net/arp.h
@@ -25,5 +25,6 @@ extern struct sk_buff *arp_create(int type, int ptype, __be32 dest_ip,
const unsigned char *src_hw,
const unsigned char *target_hw);
extern void arp_xmit(struct sk_buff *skb);
+int arp_invalidate(struct net_device *dev, __be32 ip);
#endif /* _ARP_H */
diff --git a/net/ipv4/arp.c b/net/ipv4/arp.c
index a2fc7b961dbc..04c8b69fd426 100644
--- a/net/ipv4/arp.c
+++ b/net/ipv4/arp.c
@@ -1143,6 +1143,23 @@ static int arp_req_get(struct arpreq *r, struct net_device *dev)
return err;
}
+int arp_invalidate(struct net_device *dev, __be32 ip)
+{
+ struct neighbour *neigh = neigh_lookup(&arp_tbl, &ip, dev);
+ int err = -ENXIO;
+
+ if (neigh) {
+ if (neigh->nud_state & ~NUD_NOARP)
+ err = neigh_update(neigh, NULL, NUD_FAILED,
+ NEIGH_UPDATE_F_OVERRIDE|
+ NEIGH_UPDATE_F_ADMIN);
+ neigh_release(neigh);
+ }
+
+ return err;
+}
+EXPORT_SYMBOL(arp_invalidate);
+
static int arp_req_delete_public(struct net *net, struct arpreq *r,
struct net_device *dev)
{
@@ -1163,7 +1180,6 @@ static int arp_req_delete(struct net *net, struct arpreq *r,
{
int err;
__be32 ip;
- struct neighbour *neigh;
if (r->arp_flags & ATF_PUBL)
return arp_req_delete_public(net, r, dev);
@@ -1181,16 +1197,7 @@ static int arp_req_delete(struct net *net, struct arpreq *r,
if (!dev)
return -EINVAL;
}
- err = -ENXIO;
- neigh = neigh_lookup(&arp_tbl, &ip, dev);
- if (neigh) {
- if (neigh->nud_state & ~NUD_NOARP)
- err = neigh_update(neigh, NULL, NUD_FAILED,
- NEIGH_UPDATE_F_OVERRIDE|
- NEIGH_UPDATE_F_ADMIN);
- neigh_release(neigh);
- }
- return err;
+ return arp_invalidate(dev, ip);
}
/*