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Date: Fri, 18 Jan 2013 07:54:05 +0900
From: YOSHIFUJI Hideaki <yoshfuji@...ux-ipv6.org>
To: davem@...emloft.net, netdev@...r.kernel.org
CC: yoshfuji@...ux-ipv6.org, xiyou.wangcong@...il.com
Subject: [PATCH net-next (V4) 11/11] ipv6: Complete neighbour entry removal
from dst_entry.
CC: Cong Wang <xiyou.wangcong@...il.com>
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@...ux-ipv6.org>
---
include/net/ip6_fib.h | 2 --
net/ipv6/route.c | 84 +----------------------------------------------
net/ipv6/xfrm6_policy.c | 1 -
3 files changed, 1 insertion(+), 86 deletions(-)
diff --git a/include/net/ip6_fib.h b/include/net/ip6_fib.h
index fdc48a9..6919a50 100644
--- a/include/net/ip6_fib.h
+++ b/include/net/ip6_fib.h
@@ -89,8 +89,6 @@ struct fib6_table;
struct rt6_info {
struct dst_entry dst;
- struct neighbour *n;
-
/*
* Tail elements of dst_entry (__refcnt etc.)
* and these elements (rarely used in hot path) are in
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index afc8386..3a562a1 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -151,19 +151,6 @@ static struct neighbour *ip6_neigh_lookup(const struct dst_entry *dst,
return neigh_create(&nd_tbl, daddr, dst->dev);
}
-static int rt6_bind_neighbour(struct rt6_info *rt, struct net_device *dev)
-{
- struct neighbour *n = __ipv6_neigh_lookup(dev, &rt->rt6i_gateway);
- if (!n) {
- n = neigh_create(&nd_tbl, &rt->rt6i_gateway, dev);
- if (IS_ERR(n))
- return PTR_ERR(n);
- }
- rt->n = n;
-
- return 0;
-}
-
static struct dst_ops ip6_dst_ops_template = {
.family = AF_INET6,
.protocol = cpu_to_be16(ETH_P_IPV6),
@@ -301,9 +288,6 @@ static void ip6_dst_destroy(struct dst_entry *dst)
struct rt6_info *rt = (struct rt6_info *)dst;
struct inet6_dev *idev = rt->rt6i_idev;
- if (rt->n)
- neigh_release(rt->n);
-
if (!(rt->dst.flags & DST_HOST))
dst_destroy_metrics_generic(dst);
@@ -354,11 +338,6 @@ static void ip6_dst_ifdown(struct dst_entry *dst, struct net_device *dev,
in6_dev_put(idev);
}
}
- if (rt->n && rt->n->dev == dev) {
- rt->n->dev = loopback_dev;
- dev_hold(loopback_dev);
- dev_put(dev);
- }
}
}
@@ -845,8 +824,6 @@ static struct rt6_info *rt6_alloc_cow(struct rt6_info *ort,
rt = ip6_rt_copy(ort, daddr);
if (rt) {
- int attempts = !in_softirq();
-
if (!(rt->rt6i_flags & RTF_GATEWAY)) {
if (ort->rt6i_dst.plen != 128 &&
ipv6_addr_equal(&ort->rt6i_dst.addr, daddr))
@@ -862,32 +839,6 @@ static struct rt6_info *rt6_alloc_cow(struct rt6_info *ort,
rt->rt6i_src.plen = 128;
}
#endif
-
- retry:
- if (rt6_bind_neighbour(rt, rt->dst.dev)) {
- struct net *net = dev_net(rt->dst.dev);
- int saved_rt_min_interval =
- net->ipv6.sysctl.ip6_rt_gc_min_interval;
- int saved_rt_elasticity =
- net->ipv6.sysctl.ip6_rt_gc_elasticity;
-
- if (attempts-- > 0) {
- net->ipv6.sysctl.ip6_rt_gc_elasticity = 1;
- net->ipv6.sysctl.ip6_rt_gc_min_interval = 0;
-
- ip6_dst_gc(&net->ipv6.ip6_dst_ops);
-
- net->ipv6.sysctl.ip6_rt_gc_elasticity =
- saved_rt_elasticity;
- net->ipv6.sysctl.ip6_rt_gc_min_interval =
- saved_rt_min_interval;
- goto retry;
- }
-
- net_warn_ratelimited("Neighbour table overflow\n");
- dst_free(&rt->dst);
- return NULL;
- }
}
return rt;
@@ -898,10 +849,8 @@ static struct rt6_info *rt6_alloc_clone(struct rt6_info *ort,
{
struct rt6_info *rt = ip6_rt_copy(ort, daddr);
- if (rt) {
+ if (rt)
rt->rt6i_flags |= RTF_CACHE;
- rt->n = neigh_clone(ort->n);
- }
return rt;
}
@@ -1272,20 +1221,8 @@ struct dst_entry *icmp6_dst_alloc(struct net_device *dev,
goto out;
}
- if (neigh)
- neigh_hold(neigh);
- else {
- neigh = ip6_neigh_lookup(&rt->dst, NULL, &fl6->daddr);
- if (IS_ERR(neigh)) {
- in6_dev_put(idev);
- dst_free(&rt->dst);
- return ERR_CAST(neigh);
- }
- }
-
rt->dst.flags |= DST_HOST;
rt->dst.output = ip6_output;
- rt->n = neigh;
atomic_set(&rt->dst.__refcnt, 1);
rt->rt6i_dst.addr = fl6->daddr;
rt->rt6i_dst.plen = 128;
@@ -1594,12 +1531,6 @@ int ip6_route_add(struct fib6_config *cfg)
} else
rt->rt6i_prefsrc.plen = 0;
- if (cfg->fc_flags & (RTF_GATEWAY | RTF_NONEXTHOP)) {
- err = rt6_bind_neighbour(rt, dev);
- if (err)
- goto out;
- }
-
rt->rt6i_flags = cfg->fc_flags;
install_route:
@@ -1713,7 +1644,6 @@ static void rt6_do_redirect(struct dst_entry *dst, struct sock *sk, struct sk_bu
struct netevent_redirect netevent;
struct rt6_info *rt, *nrt = NULL;
struct ndisc_options ndopts;
- struct neighbour *old_neigh;
struct inet6_dev *in6_dev;
struct neighbour *neigh;
struct rd_msg *msg;
@@ -1786,11 +1716,6 @@ static void rt6_do_redirect(struct dst_entry *dst, struct sock *sk, struct sk_bu
if (!neigh)
return;
- /* Duplicate redirect: silently ignore. */
- old_neigh = rt->n;
- if (neigh == old_neigh)
- goto out;
-
/*
* We have finally decided to accept it.
*/
@@ -1811,7 +1736,6 @@ static void rt6_do_redirect(struct dst_entry *dst, struct sock *sk, struct sk_bu
nrt->rt6i_flags &= ~RTF_GATEWAY;
nrt->rt6i_gateway = *(struct in6_addr *)neigh->primary_key;
- nrt->n = neigh_clone(neigh);
if (ip6_ins_rt(nrt))
goto out;
@@ -2125,7 +2049,6 @@ struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev,
{
struct net *net = dev_net(idev->dev);
struct rt6_info *rt = ip6_dst_alloc(net, net->loopback_dev, 0, NULL);
- int err;
if (!rt) {
net_warn_ratelimited("Maximum number of routes reached, consider increasing route/max_size\n");
@@ -2144,11 +2067,6 @@ struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev,
rt->rt6i_flags |= RTF_ANYCAST;
else
rt->rt6i_flags |= RTF_LOCAL;
- err = rt6_bind_neighbour(rt, rt->dst.dev);
- if (err) {
- dst_free(&rt->dst);
- return ERR_PTR(err);
- }
rt->rt6i_dst.addr = *addr;
rt->rt6i_dst.plen = 128;
diff --git a/net/ipv6/xfrm6_policy.c b/net/ipv6/xfrm6_policy.c
index c984413..1282737 100644
--- a/net/ipv6/xfrm6_policy.c
+++ b/net/ipv6/xfrm6_policy.c
@@ -110,7 +110,6 @@ static int xfrm6_fill_dst(struct xfrm_dst *xdst, struct net_device *dev,
/* Sheit... I remember I did this right. Apparently,
* it was magically lost, so this code needs audit */
- xdst->u.rt6.n = neigh_clone(rt->n);
xdst->u.rt6.rt6i_flags = rt->rt6i_flags & (RTF_ANYCAST |
RTF_LOCAL);
xdst->u.rt6.rt6i_metric = rt->rt6i_metric;
--
1.7.9.5
--
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