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authorDavid S. Miller <davem@davemloft.net>2011-12-28 15:41:23 -0500
committerDavid S. Miller <davem@davemloft.net>2011-12-28 15:41:23 -0500
commitf83c7790dc0025fffbd8684f3803a7571f624baa (patch)
tree9e745f6b44b1947033a143423560af6a3157fce7 /net/ipv6
parent2c2aba6c561ac425602f4a0be61422224cb87151 (diff)
downloadop-kernel-dev-f83c7790dc0025fffbd8684f3803a7571f624baa.zip
op-kernel-dev-f83c7790dc0025fffbd8684f3803a7571f624baa.tar.gz
ipv6: Create fast inline ipv6 neigh lookup just like ipv4.
Also, create and use an rt6_bind_neighbour() in net/ipv6/route.c to consolidate some common logic. Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6')
-rw-r--r--net/ipv6/route.c41
1 files changed, 22 insertions, 19 deletions
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 35b07cc..6bf6094 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -123,7 +123,20 @@ static u32 *ipv6_cow_metrics(struct dst_entry *dst, unsigned long old)
static struct neighbour *ip6_neigh_lookup(const struct dst_entry *dst, const void *daddr)
{
- return __neigh_lookup_errno(&nd_tbl, daddr, dst->dev);
+ struct neighbour *n = __ipv6_neigh_lookup(&nd_tbl, dst->dev, daddr);
+ if (n)
+ return n;
+ return neigh_create(&nd_tbl, daddr, dst->dev);
+}
+
+static int rt6_bind_neighbour(struct rt6_info *rt)
+{
+ struct neighbour *n = ip6_neigh_lookup(&rt->dst, &rt->rt6i_gateway);
+ if (IS_ERR(n))
+ return PTR_ERR(n);
+ dst_set_neighbour(&rt->dst, n);
+
+ return 0;
}
static struct dst_ops ip6_dst_ops_template = {
@@ -714,7 +727,6 @@ static struct rt6_info *rt6_alloc_cow(const struct rt6_info *ort,
rt = ip6_rt_copy(ort, daddr);
if (rt) {
- struct neighbour *neigh;
int attempts = !in_softirq();
if (!(rt->rt6i_flags & RTF_GATEWAY)) {
@@ -734,9 +746,7 @@ static struct rt6_info *rt6_alloc_cow(const struct rt6_info *ort,
#endif
retry:
- neigh = __neigh_lookup_errno(&nd_tbl, &rt->rt6i_gateway,
- rt->rt6i_dev);
- if (IS_ERR(neigh)) {
+ if (rt6_bind_neighbour(rt)) {
struct net *net = dev_net(rt->rt6i_dev);
int saved_rt_min_interval =
net->ipv6.sysctl.ip6_rt_gc_min_interval;
@@ -762,8 +772,6 @@ static struct rt6_info *rt6_alloc_cow(const struct rt6_info *ort,
dst_free(&rt->dst);
return NULL;
}
- dst_set_neighbour(&rt->dst, neigh);
-
}
return rt;
@@ -1078,7 +1086,7 @@ struct dst_entry *icmp6_dst_alloc(struct net_device *dev,
if (neigh)
neigh_hold(neigh);
else {
- neigh = __neigh_lookup_errno(&nd_tbl, &fl6->daddr, dev);
+ neigh = ip6_neigh_lookup(&rt->dst, &fl6->daddr);
if (IS_ERR(neigh)) {
dst_free(&rt->dst);
return ERR_CAST(neigh);
@@ -1389,12 +1397,9 @@ int ip6_route_add(struct fib6_config *cfg)
rt->rt6i_prefsrc.plen = 0;
if (cfg->fc_flags & (RTF_GATEWAY | RTF_NONEXTHOP)) {
- struct neighbour *n = __neigh_lookup_errno(&nd_tbl, &rt->rt6i_gateway, dev);
- if (IS_ERR(n)) {
- err = PTR_ERR(n);
+ err = rt6_bind_neighbour(rt);
+ if (err)
goto out;
- }
- dst_set_neighbour(&rt->dst, n);
}
rt->rt6i_flags = cfg->fc_flags;
@@ -2057,7 +2062,7 @@ 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->ipv6.ip6_dst_ops,
net->loopback_dev, 0);
- struct neighbour *neigh;
+ int err;
if (!rt) {
if (net_ratelimit())
@@ -2079,13 +2084,11 @@ struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev,
rt->rt6i_flags |= RTF_ANYCAST;
else
rt->rt6i_flags |= RTF_LOCAL;
- neigh = __neigh_lookup_errno(&nd_tbl, &rt->rt6i_gateway, rt->rt6i_dev);
- if (IS_ERR(neigh)) {
+ err = rt6_bind_neighbour(rt);
+ if (err) {
dst_free(&rt->dst);
-
- return ERR_CAST(neigh);
+ return ERR_PTR(err);
}
- dst_set_neighbour(&rt->dst, neigh);
rt->rt6i_dst.addr = *addr;
rt->rt6i_dst.plen = 128;
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