net: Add VRF support to IPv6 stack

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

diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c
index 9f8a824882233634c062491b7cbdfe67c4cb2629..3e0f855e1bead049064a284494eda378f85ae47e 100644 (file)
--- a/net/ipv6/ndisc.c
+++ b/net/ipv6/ndisc.c
@@ -67,6 +67,7 @@
 #include <net/flow.h>
 #include <net/ip6_checksum.h>
 #include <net/inet_common.h>
+#include <net/l3mdev.h>
 #include <linux/proc_fs.h>
 
 #include <linux/netfilter.h>
@@ -442,8 +443,11 @@ static void ndisc_send_skb(struct sk_buff *skb,
 
        if (!dst) {
                struct flowi6 fl6;
+               int oif = l3mdev_fib_oif(skb->dev);
 
-               icmpv6_flow_init(sk, &fl6, type, saddr, daddr, skb->dev->ifindex);
+               icmpv6_flow_init(sk, &fl6, type, saddr, daddr, oif);
+               if (oif != skb->dev->ifindex)
+                       fl6.flowi6_flags |= FLOWI_FLAG_L3MDEV_SRC;
                dst = icmp6_dst_alloc(skb->dev, &fl6);
                if (IS_ERR(dst)) {
                        kfree_skb(skb);
@@ -767,7 +771,7 @@ static void ndisc_recv_ns(struct sk_buff *skb)
 
        ifp = ipv6_get_ifaddr(dev_net(dev), &msg->target, dev, 1);
        if (ifp) {
-
+have_ifp:
                if (ifp->flags & (IFA_F_TENTATIVE|IFA_F_OPTIMISTIC)) {
                        if (dad) {
                                /*
@@ -793,6 +797,18 @@ static void ndisc_recv_ns(struct sk_buff *skb)
        } else {
                struct net *net = dev_net(dev);
 
+               /* perhaps an address on the master device */
+               if (netif_is_l3_slave(dev)) {
+                       struct net_device *mdev;
+
+                       mdev = netdev_master_upper_dev_get_rcu(dev);
+                       if (mdev) {
+                               ifp = ipv6_get_ifaddr(net, &msg->target, mdev, 1);
+                               if (ifp)
+                                       goto have_ifp;
+                       }
+               }
+
                idev = in6_dev_get(dev);
                if (!idev) {
                        /* XXX: count this drop? */
@@ -1484,6 +1500,7 @@ void ndisc_send_redirect(struct sk_buff *skb, const struct in6_addr *target)
        struct flowi6 fl6;
        int rd_len;
        u8 ha_buf[MAX_ADDR_LEN], *ha = NULL;
+       int oif = l3mdev_fib_oif(dev);
        bool ret;
 
        if (ipv6_get_lladdr(dev, &saddr_buf, IFA_F_TENTATIVE)) {
@@ -1500,7 +1517,10 @@ void ndisc_send_redirect(struct sk_buff *skb, const struct in6_addr *target)
        }
 
        icmpv6_flow_init(sk, &fl6, NDISC_REDIRECT,
-                        &saddr_buf, &ipv6_hdr(skb)->saddr, dev->ifindex);
+                        &saddr_buf, &ipv6_hdr(skb)->saddr, oif);
+
+       if (oif != skb->dev->ifindex)
+               fl6.flowi6_flags |= FLOWI_FLAG_L3MDEV_SRC;
 
        dst = ip6_route_output(net, NULL, &fl6);
        if (dst->error) {