1 files changed, 43 insertions, 0 deletions

diff --git a/net/ipv6/xfrm6_policy.c b/net/ipv6/xfrm6_policy.c
index 8a4f37de4d2d..4429b1a1fe5f 100644
--- a/net/ipv6/xfrm6_policy.c
+++ b/net/ipv6/xfrm6_policy.c
@@ -11,7 +11,11 @@
  * 
  */
 
+#include <asm/bug.h>
+#include <linux/compiler.h>
 #include <linux/config.h>
+#include <linux/netdevice.h>
+#include <net/addrconf.h>
 #include <net/xfrm.h>
 #include <net/ip.h>
 #include <net/ipv6.h>
@@ -166,6 +170,8 @@ __xfrm6_bundle_create(struct xfrm_policy *policy, struct xfrm_state **xfrm, int
                 memcpy(&x->u.rt6.rt6i_gateway, &rt0->rt6i_gateway, sizeof(x->u.rt6.rt6i_gateway)); 
                 x->u.rt6.rt6i_dst      = rt0->rt6i_dst;
                 x->u.rt6.rt6i_src      = rt0->rt6i_src; 
+                x->u.rt6.rt6i_idev     = rt0->rt6i_idev;
+                in6_dev_hold(rt0->rt6i_idev);
                 header_len -= x->u.dst.xfrm->props.header_len;
                 trailer_len -= x->u.dst.xfrm->props.trailer_len;
         }
@@ -251,11 +257,48 @@ static void xfrm6_update_pmtu(struct dst_entry *dst, u32 mtu)
         path->ops->update_pmtu(path, mtu);
 }
 
+static void xfrm6_dst_destroy(struct dst_entry *dst)
+{
+        struct xfrm_dst *xdst = (struct xfrm_dst *)dst;
+
+        if (likely(xdst->u.rt6.rt6i_idev))
+                in6_dev_put(xdst->u.rt6.rt6i_idev);
+        xfrm_dst_destroy(xdst);
+}
+
+static void xfrm6_dst_ifdown(struct dst_entry *dst, struct net_device *dev,
+                             int unregister)
+{
+        struct xfrm_dst *xdst;
+
+        if (!unregister)
+                return;
+
+        xdst = (struct xfrm_dst *)dst;
+        if (xdst->u.rt6.rt6i_idev->dev == dev) {
+                struct inet6_dev *loopback_idev = in6_dev_get(&loopback_dev);
+                BUG_ON(!loopback_idev);
+
+                do {
+                        in6_dev_put(xdst->u.rt6.rt6i_idev);
+                        xdst->u.rt6.rt6i_idev = loopback_idev;
+                        in6_dev_hold(loopback_idev);
+                        xdst = (struct xfrm_dst *)xdst->u.dst.child;
+                } while (xdst->u.dst.xfrm);
+
+                __in6_dev_put(loopback_idev);
+        }
+
+        xfrm_dst_ifdown(dst, dev);
+}
+
 static struct dst_ops xfrm6_dst_ops = {
         .family =               AF_INET6,
         .protocol =             __constant_htons(ETH_P_IPV6),
         .gc =                   xfrm6_garbage_collect,
         .update_pmtu =          xfrm6_update_pmtu,
+        .destroy =              xfrm6_dst_destroy,
+        .ifdown =               xfrm6_dst_ifdown,
         .gc_thresh =            1024,
         .entry_size =           sizeof(struct xfrm_dst),
 };