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authorMartin KaFai Lau <kafai@fb.com>2015-05-22 20:56:05 -0700
committerDavid S. Miller <davem@davemloft.net>2015-05-25 13:25:34 -0400
commit83a09abd1a8badbbb715f928d07c65ac47709c47 (patch)
tree8473ad8665ac9f23947f0df29f601b1c8b6b1012
parentipv6: Keep track of DST_NOCACHE routes in case of iface down/unregister (diff)
downloadlinux-dev-83a09abd1a8badbbb715f928d07c65ac47709c47.tar.xz
linux-dev-83a09abd1a8badbbb715f928d07c65ac47709c47.zip
ipv6: Break up ip6_rt_copy()
This patch breaks up ip6_rt_copy() into ip6_rt_copy_init() and ip6_rt_cache_alloc(). In the later patch, we need to create a percpu rt6_info copy. Hence, refactor the common rt6_info init codes to ip6_rt_copy_init(). Signed-off-by: Martin KaFai Lau <kafai@fb.com> Cc: Hannes Frederic Sowa <hannes@stressinduktion.org> Cc: Steffen Klassert <steffen.klassert@secunet.com> Cc: Julian Anastasov <ja@ssi.bg> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/ipv6/route.c90
1 files changed, 41 insertions, 49 deletions
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 94ce1e0b5a33..90c8eaa24565 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -72,8 +72,7 @@ enum rt6_nud_state {
RT6_NUD_SUCCEED = 1
};
-static struct rt6_info *ip6_rt_copy(struct rt6_info *ort,
- const struct in6_addr *dest);
+static void ip6_rt_copy_init(struct rt6_info *rt, struct rt6_info *ort);
static struct dst_entry *ip6_dst_check(struct dst_entry *dst, u32 cookie);
static unsigned int ip6_default_advmss(const struct dst_entry *dst);
static unsigned int ip6_mtu(const struct dst_entry *dst);
@@ -913,22 +912,32 @@ static struct rt6_info *ip6_rt_cache_alloc(struct rt6_info *ort,
* Clone the route.
*/
- rt = ip6_rt_copy(ort, daddr);
+ if (ort->rt6i_flags & RTF_CACHE)
+ ort = (struct rt6_info *)ort->dst.from;
- if (rt) {
- rt->rt6i_flags |= RTF_CACHE;
+ rt = ip6_dst_alloc(dev_net(ort->dst.dev), ort->dst.dev,
+ 0, ort->rt6i_table);
+
+ if (!rt)
+ return NULL;
+
+ ip6_rt_copy_init(rt, ort);
+ rt->rt6i_flags |= RTF_CACHE;
+ rt->rt6i_metric = 0;
+ rt->dst.flags |= DST_HOST;
+ rt->rt6i_dst.addr = *daddr;
+ rt->rt6i_dst.plen = 128;
- if (!rt6_is_gw_or_nonexthop(ort)) {
- if (ort->rt6i_dst.plen != 128 &&
- ipv6_addr_equal(&ort->rt6i_dst.addr, daddr))
- rt->rt6i_flags |= RTF_ANYCAST;
+ if (!rt6_is_gw_or_nonexthop(ort)) {
+ if (ort->rt6i_dst.plen != 128 &&
+ ipv6_addr_equal(&ort->rt6i_dst.addr, daddr))
+ rt->rt6i_flags |= RTF_ANYCAST;
#ifdef CONFIG_IPV6_SUBTREES
- if (rt->rt6i_src.plen && saddr) {
- rt->rt6i_src.addr = *saddr;
- rt->rt6i_src.plen = 128;
- }
-#endif
+ if (rt->rt6i_src.plen && saddr) {
+ rt->rt6i_src.addr = *saddr;
+ rt->rt6i_src.plen = 128;
}
+#endif
}
return rt;
@@ -1980,7 +1989,7 @@ static void rt6_do_redirect(struct dst_entry *dst, struct sock *sk, struct sk_bu
NEIGH_UPDATE_F_ISROUTER))
);
- nrt = ip6_rt_copy(rt, &msg->dest);
+ nrt = ip6_rt_cache_alloc(rt, &msg->dest, NULL);
if (!nrt)
goto out;
@@ -2022,42 +2031,25 @@ static void rt6_set_from(struct rt6_info *rt, struct rt6_info *from)
dst_init_metrics(&rt->dst, dst_metrics_ptr(&from->dst), true);
}
-static struct rt6_info *ip6_rt_copy(struct rt6_info *ort,
- const struct in6_addr *dest)
-{
- struct net *net = dev_net(ort->dst.dev);
- struct rt6_info *rt;
-
- if (ort->rt6i_flags & RTF_CACHE)
- ort = (struct rt6_info *)ort->dst.from;
-
- rt = ip6_dst_alloc(net, ort->dst.dev, 0,
- ort->rt6i_table);
-
- if (rt) {
- rt->dst.input = ort->dst.input;
- rt->dst.output = ort->dst.output;
- rt->dst.flags |= DST_HOST;
-
- rt->rt6i_dst.addr = *dest;
- rt->rt6i_dst.plen = 128;
- rt->dst.error = ort->dst.error;
- rt->rt6i_idev = ort->rt6i_idev;
- if (rt->rt6i_idev)
- in6_dev_hold(rt->rt6i_idev);
- rt->dst.lastuse = jiffies;
- rt->rt6i_gateway = ort->rt6i_gateway;
- rt->rt6i_flags = ort->rt6i_flags;
- rt6_set_from(rt, ort);
- rt->rt6i_metric = 0;
-
+static void ip6_rt_copy_init(struct rt6_info *rt, struct rt6_info *ort)
+{
+ rt->dst.input = ort->dst.input;
+ rt->dst.output = ort->dst.output;
+ rt->rt6i_dst = ort->rt6i_dst;
+ rt->dst.error = ort->dst.error;
+ rt->rt6i_idev = ort->rt6i_idev;
+ if (rt->rt6i_idev)
+ in6_dev_hold(rt->rt6i_idev);
+ rt->dst.lastuse = jiffies;
+ rt->rt6i_gateway = ort->rt6i_gateway;
+ rt->rt6i_flags = ort->rt6i_flags;
+ rt6_set_from(rt, ort);
+ rt->rt6i_metric = ort->rt6i_metric;
#ifdef CONFIG_IPV6_SUBTREES
- memcpy(&rt->rt6i_src, &ort->rt6i_src, sizeof(struct rt6key));
+ rt->rt6i_src = ort->rt6i_src;
#endif
- memcpy(&rt->rt6i_prefsrc, &ort->rt6i_prefsrc, sizeof(struct rt6key));
- rt->rt6i_table = ort->rt6i_table;
- }
- return rt;
+ rt->rt6i_prefsrc = ort->rt6i_prefsrc;
+ rt->rt6i_table = ort->rt6i_table;
}
#ifdef CONFIG_IPV6_ROUTE_INFO