diff options
Diffstat (limited to 'net/ipv4/arp.c')
| -rw-r--r-- | net/ipv4/arp.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/net/ipv4/arp.c b/net/ipv4/arp.c index 9e17cd05daff..0f2dac5c25bb 100644 --- a/net/ipv4/arp.c +++ b/net/ipv4/arp.c @@ -1121,13 +1121,18 @@ static int arp_req_get(struct arpreq *r, struct net_device *dev) return err; } -static int arp_invalidate(struct net_device *dev, __be32 ip) +int arp_invalidate(struct net_device *dev, __be32 ip, bool force) { struct neighbour *neigh = neigh_lookup(&arp_tbl, &ip, dev); int err = -ENXIO; struct neigh_table *tbl = &arp_tbl; if (neigh) { + if ((neigh->nud_state & NUD_VALID) && !force) { + neigh_release(neigh); + return 0; + } + if (neigh->nud_state & ~NUD_NOARP) err = neigh_update(neigh, NULL, NUD_FAILED, NEIGH_UPDATE_F_OVERRIDE| @@ -1174,7 +1179,7 @@ static int arp_req_delete(struct net *net, struct arpreq *r, if (!dev) return -EINVAL; } - return arp_invalidate(dev, ip); + return arp_invalidate(dev, ip, true); } /* |