inet: Minimize use of cached route inetpeer.
Only use it in the absolutely required cases:
1) COW'ing metrics
2) ipv4 PMTU
3) ipv4 redirects
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c
index 69a6330..0fddd57 100644
--- a/net/ipv6/ndisc.c
+++ b/net/ipv6/ndisc.c
@@ -1486,6 +1486,7 @@
int rd_len;
int err;
u8 ha_buf[MAX_ADDR_LEN], *ha = NULL;
+ bool ret;
if (ipv6_get_lladdr(dev, &saddr_buf, IFA_F_TENTATIVE)) {
ND_PRINTK(2, warn, "Redirect: no link-local address on %s\n",
@@ -1519,8 +1520,11 @@
"Redirect: destination is not a neighbour\n");
goto release;
}
- peer = rt6_get_peer_create(rt);
- if (!inet_peer_xrlim_allow(peer, 1*HZ))
+ peer = inet_getpeer_v6(net->ipv6.peers, &rt->rt6i_dst.addr, 1);
+ ret = inet_peer_xrlim_allow(peer, 1*HZ);
+ if (peer)
+ inet_putpeer(peer);
+ if (!ret)
goto release;
if (dev->addr_len) {