net: ipv6: autoconf routes into per-device tables

[firefly-linux-kernel-4.4.55.git] / net / ipv6 / route.c

diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 826e6aa44f8d42c9c2e815ee134a4f58f1f29c80..391a3be3cabc856f539a57c011bd36836b0d4bbe 100644 (file)
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -99,13 +99,12 @@ static void         rt6_dst_from_metrics_check(struct rt6_info *rt);
 static int rt6_score_route(struct rt6_info *rt, int oif, int strict);
 
 #ifdef CONFIG_IPV6_ROUTE_INFO
-static struct rt6_info *rt6_add_route_info(struct net *net,
+static struct rt6_info *rt6_add_route_info(struct net_device *dev,
                                           const struct in6_addr *prefix, int prefixlen,
-                                          const struct in6_addr *gwaddr, int ifindex,
-                                          unsigned int pref);
-static struct rt6_info *rt6_get_route_info(struct net *net,
+                                          const struct in6_addr *gwaddr, unsigned int pref);
+static struct rt6_info *rt6_get_route_info(struct net_device *dev,
                                           const struct in6_addr *prefix, int prefixlen,
-                                          const struct in6_addr *gwaddr, int ifindex);
+                                          const struct in6_addr *gwaddr);
 #endif
 
 struct uncached_list {
@@ -755,7 +754,6 @@ static bool rt6_is_gw_or_nonexthop(const struct rt6_info *rt)
 int rt6_route_rcv(struct net_device *dev, u8 *opt, int len,
                  const struct in6_addr *gwaddr)
 {
-       struct net *net = dev_net(dev);
        struct route_info *rinfo = (struct route_info *) opt;
        struct in6_addr prefix_buf, *prefix;
        unsigned int pref;
@@ -800,8 +798,7 @@ int rt6_route_rcv(struct net_device *dev, u8 *opt, int len,
        if (rinfo->prefix_len == 0)
                rt = rt6_get_dflt_router(gwaddr, dev);
        else
-               rt = rt6_get_route_info(net, prefix, rinfo->prefix_len,
-                                       gwaddr, dev->ifindex);
+               rt = rt6_get_route_info(net, prefix, rinfo->prefix_len, gwaddr);
 
        if (rt && !lifetime) {
                ip6_del_rt(rt);
@@ -809,8 +806,7 @@ int rt6_route_rcv(struct net_device *dev, u8 *opt, int len,
        }
 
        if (!rt && lifetime)
-               rt = rt6_add_route_info(net, prefix, rinfo->prefix_len, gwaddr, dev->ifindex,
-                                       pref);
+               rt = rt6_add_route_info(dev, prefix, rinfo->prefix_len, gwaddr, pref);
        else if (rt)
                rt->rt6i_flags = RTF_ROUTEINFO |
                                 (rt->rt6i_flags & ~RTF_PREF_MASK) | RTF_PREF(pref);
@@ -2247,15 +2243,16 @@ static void ip6_rt_copy_init(struct rt6_info *rt, struct rt6_info *ort)
 }
 
 #ifdef CONFIG_IPV6_ROUTE_INFO
-static struct rt6_info *rt6_get_route_info(struct net *net,
+static struct rt6_info *rt6_get_route_info(struct net_device *dev,
                                           const struct in6_addr *prefix, int prefixlen,
-                                          const struct in6_addr *gwaddr, int ifindex)
+                                          const struct in6_addr *gwaddr)
 {
        struct fib6_node *fn;
        struct rt6_info *rt = NULL;
        struct fib6_table *table;
 
-       table = fib6_get_table(net, RT6_TABLE_INFO);
+       table = fib6_get_table(dev_net(dev),
+                              addrconf_rt_table(dev, RT6_TABLE_INFO));
        if (!table)
                return NULL;
 
@@ -2265,7 +2262,7 @@ static struct rt6_info *rt6_get_route_info(struct net *net,
                goto out;
 
        for (rt = fn->leaf; rt; rt = rt->dst.rt6_next) {
-               if (rt->dst.dev->ifindex != ifindex)
+               if (rt->dst.dev->ifindex != dev->ifindex)
                        continue;
                if ((rt->rt6i_flags & (RTF_ROUTEINFO|RTF_GATEWAY)) != (RTF_ROUTEINFO|RTF_GATEWAY))
                        continue;
@@ -2279,23 +2276,22 @@ out:
        return rt;
 }
 
-static struct rt6_info *rt6_add_route_info(struct net *net,
+static struct rt6_info *rt6_add_route_info(struct net_device *dev,
                                           const struct in6_addr *prefix, int prefixlen,
-                                          const struct in6_addr *gwaddr, int ifindex,
-                                          unsigned int pref)
+                                          const struct in6_addr *gwaddr, unsigned int pref)
 {
        struct fib6_config cfg = {
                .fc_metric      = IP6_RT_PRIO_USER,
-               .fc_ifindex     = ifindex,
+               .fc_ifindex     = dev->ifindex,
                .fc_dst_len     = prefixlen,
                .fc_flags       = RTF_GATEWAY | RTF_ADDRCONF | RTF_ROUTEINFO |
                                  RTF_UP | RTF_PREF(pref),
                .fc_nlinfo.portid = 0,
                .fc_nlinfo.nlh = NULL,
-               .fc_nlinfo.nl_net = net,
+               .fc_nlinfo.nl_net = dev_net(dev),
        };
 
-       cfg.fc_table = l3mdev_fib_table_by_index(net, ifindex) ? : RT6_TABLE_INFO;
+       cfg.fc_table = l3mdev_fib_table_by_index(dev_net(dev), dev->ifindex) ? : addrconf_rt_table(dev, RT6_TABLE_INFO);
        cfg.fc_dst = *prefix;
        cfg.fc_gateway = *gwaddr;
 
@@ -2305,7 +2301,7 @@ static struct rt6_info *rt6_add_route_info(struct net *net,
 
        ip6_route_add(&cfg);
 
-       return rt6_get_route_info(net, prefix, prefixlen, gwaddr, ifindex);
+       return rt6_get_route_info(dev, prefix, prefixlen, gwaddr);
 }
 #endif
 
@@ -2314,7 +2310,8 @@ struct rt6_info *rt6_get_dflt_router(const struct in6_addr *addr, struct net_dev
        struct rt6_info *rt;
        struct fib6_table *table;
 
-       table = fib6_get_table(dev_net(dev), RT6_TABLE_DFLT);
+       table = fib6_get_table(dev_net(dev),
+                              addrconf_rt_table(dev, RT6_TABLE_MAIN));
        if (!table)
                return NULL;
 
@@ -2336,7 +2333,7 @@ struct rt6_info *rt6_add_dflt_router(const struct in6_addr *gwaddr,
                                     unsigned int pref)
 {
        struct fib6_config cfg = {
-               .fc_table       = l3mdev_fib_table(dev) ? : RT6_TABLE_DFLT,
+               .fc_table       = l3mdev_fib_table(dev) ? : addrconf_rt_table(dev, RT6_TABLE_DFLT),
                .fc_metric      = IP6_RT_PRIO_USER,
                .fc_ifindex     = dev->ifindex,
                .fc_flags       = RTF_GATEWAY | RTF_ADDRCONF | RTF_DEFAULT |
@@ -2353,28 +2350,17 @@ struct rt6_info *rt6_add_dflt_router(const struct in6_addr *gwaddr,
        return rt6_get_dflt_router(gwaddr, dev);
 }
 
-void rt6_purge_dflt_routers(struct net *net)
-{
-       struct rt6_info *rt;
-       struct fib6_table *table;
 
-       /* NOTE: Keep consistent with rt6_get_dflt_router */
-       table = fib6_get_table(net, RT6_TABLE_DFLT);
-       if (!table)
-               return;
+int rt6_addrconf_purge(struct rt6_info *rt, void *arg) {
+       if (rt->rt6i_flags & (RTF_DEFAULT | RTF_ADDRCONF) &&
+           (!rt->rt6i_idev || rt->rt6i_idev->cnf.accept_ra != 2))
+               return -1;
+       return 0;
+}
 
-restart:
-       read_lock_bh(&table->tb6_lock);
-       for (rt = table->tb6_root.leaf; rt; rt = rt->dst.rt6_next) {
-               if (rt->rt6i_flags & (RTF_DEFAULT | RTF_ADDRCONF) &&
-                   (!rt->rt6i_idev || rt->rt6i_idev->cnf.accept_ra != 2)) {
-                       dst_hold(&rt->dst);
-                       read_unlock_bh(&table->tb6_lock);
-                       ip6_del_rt(rt);
-                       goto restart;
-               }
-       }
-       read_unlock_bh(&table->tb6_lock);
+void rt6_purge_dflt_routers(struct net *net)
+{
+       fib6_clean_all(net, rt6_addrconf_purge, NULL);
 }
 
 static void rtmsg_to_fib6_config(struct net *net,