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>
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83a09abd1a
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@ -72,8 +72,7 @@ enum rt6_nud_state {
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RT6_NUD_SUCCEED = 1
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};
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static struct rt6_info *ip6_rt_copy(struct rt6_info *ort,
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const struct in6_addr *dest);
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static void ip6_rt_copy_init(struct rt6_info *rt, struct rt6_info *ort);
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static struct dst_entry *ip6_dst_check(struct dst_entry *dst, u32 cookie);
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static unsigned int ip6_default_advmss(const struct dst_entry *dst);
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static unsigned int ip6_mtu(const struct dst_entry *dst);
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@ -913,22 +912,32 @@ static struct rt6_info *ip6_rt_cache_alloc(struct rt6_info *ort,
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* Clone the route.
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*/
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rt = ip6_rt_copy(ort, daddr);
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if (ort->rt6i_flags & RTF_CACHE)
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ort = (struct rt6_info *)ort->dst.from;
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if (rt) {
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rt->rt6i_flags |= RTF_CACHE;
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rt = ip6_dst_alloc(dev_net(ort->dst.dev), ort->dst.dev,
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0, ort->rt6i_table);
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if (!rt6_is_gw_or_nonexthop(ort)) {
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if (ort->rt6i_dst.plen != 128 &&
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ipv6_addr_equal(&ort->rt6i_dst.addr, daddr))
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rt->rt6i_flags |= RTF_ANYCAST;
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if (!rt)
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return NULL;
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ip6_rt_copy_init(rt, ort);
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rt->rt6i_flags |= RTF_CACHE;
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rt->rt6i_metric = 0;
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rt->dst.flags |= DST_HOST;
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rt->rt6i_dst.addr = *daddr;
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rt->rt6i_dst.plen = 128;
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if (!rt6_is_gw_or_nonexthop(ort)) {
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if (ort->rt6i_dst.plen != 128 &&
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ipv6_addr_equal(&ort->rt6i_dst.addr, daddr))
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rt->rt6i_flags |= RTF_ANYCAST;
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#ifdef CONFIG_IPV6_SUBTREES
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if (rt->rt6i_src.plen && saddr) {
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rt->rt6i_src.addr = *saddr;
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rt->rt6i_src.plen = 128;
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}
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#endif
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if (rt->rt6i_src.plen && saddr) {
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rt->rt6i_src.addr = *saddr;
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rt->rt6i_src.plen = 128;
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}
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#endif
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}
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return rt;
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@ -1980,7 +1989,7 @@ static void rt6_do_redirect(struct dst_entry *dst, struct sock *sk, struct sk_bu
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NEIGH_UPDATE_F_ISROUTER))
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);
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nrt = ip6_rt_copy(rt, &msg->dest);
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nrt = ip6_rt_cache_alloc(rt, &msg->dest, NULL);
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if (!nrt)
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goto out;
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@ -2022,42 +2031,25 @@ static void rt6_set_from(struct rt6_info *rt, struct rt6_info *from)
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dst_init_metrics(&rt->dst, dst_metrics_ptr(&from->dst), true);
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}
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static struct rt6_info *ip6_rt_copy(struct rt6_info *ort,
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const struct in6_addr *dest)
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static void ip6_rt_copy_init(struct rt6_info *rt, struct rt6_info *ort)
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{
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struct net *net = dev_net(ort->dst.dev);
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struct rt6_info *rt;
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if (ort->rt6i_flags & RTF_CACHE)
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ort = (struct rt6_info *)ort->dst.from;
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rt = ip6_dst_alloc(net, ort->dst.dev, 0,
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ort->rt6i_table);
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if (rt) {
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rt->dst.input = ort->dst.input;
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rt->dst.output = ort->dst.output;
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rt->dst.flags |= DST_HOST;
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rt->rt6i_dst.addr = *dest;
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rt->rt6i_dst.plen = 128;
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rt->dst.error = ort->dst.error;
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rt->rt6i_idev = ort->rt6i_idev;
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if (rt->rt6i_idev)
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in6_dev_hold(rt->rt6i_idev);
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rt->dst.lastuse = jiffies;
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rt->rt6i_gateway = ort->rt6i_gateway;
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rt->rt6i_flags = ort->rt6i_flags;
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rt6_set_from(rt, ort);
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rt->rt6i_metric = 0;
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rt->dst.input = ort->dst.input;
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rt->dst.output = ort->dst.output;
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rt->rt6i_dst = ort->rt6i_dst;
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rt->dst.error = ort->dst.error;
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rt->rt6i_idev = ort->rt6i_idev;
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if (rt->rt6i_idev)
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in6_dev_hold(rt->rt6i_idev);
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rt->dst.lastuse = jiffies;
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rt->rt6i_gateway = ort->rt6i_gateway;
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rt->rt6i_flags = ort->rt6i_flags;
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rt6_set_from(rt, ort);
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rt->rt6i_metric = ort->rt6i_metric;
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#ifdef CONFIG_IPV6_SUBTREES
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memcpy(&rt->rt6i_src, &ort->rt6i_src, sizeof(struct rt6key));
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rt->rt6i_src = ort->rt6i_src;
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#endif
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memcpy(&rt->rt6i_prefsrc, &ort->rt6i_prefsrc, sizeof(struct rt6key));
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rt->rt6i_table = ort->rt6i_table;
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}
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return rt;
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rt->rt6i_prefsrc = ort->rt6i_prefsrc;
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rt->rt6i_table = ort->rt6i_table;
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}
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#ifdef CONFIG_IPV6_ROUTE_INFO
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