diff options
Diffstat (limited to 'net/ipv4/route.c')
| -rw-r--r-- | net/ipv4/route.c | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/net/ipv4/route.c b/net/ipv4/route.c index 0455af8..0979e03 100644 --- a/net/ipv4/route.c +++ b/net/ipv4/route.c @@ -1308,6 +1308,13 @@ skip_hashing: return 0; } +static atomic_t __rt_peer_genid = ATOMIC_INIT(0); + +static u32 rt_peer_genid(void) +{ + return atomic_read(&__rt_peer_genid); +} + void rt_bind_peer(struct rtable *rt, int create) { struct inet_peer *peer; @@ -1316,6 +1323,8 @@ void rt_bind_peer(struct rtable *rt, int create) if (peer && cmpxchg(&rt->peer, NULL, peer) != NULL) inet_putpeer(peer); + else + rt->rt_peer_genid = rt_peer_genid(); } /* @@ -1767,8 +1776,16 @@ static void ip_rt_update_pmtu(struct dst_entry *dst, u32 mtu) static struct dst_entry *ipv4_dst_check(struct dst_entry *dst, u32 cookie) { - if (rt_is_expired((struct rtable *)dst)) + struct rtable *rt = (struct rtable *) dst; + + if (rt_is_expired(rt)) return NULL; + if (rt->rt_peer_genid != rt_peer_genid()) { + if (!rt->peer) + rt_bind_peer(rt, 0); + + rt->rt_peer_genid = rt_peer_genid(); + } return dst; } |