[IPV6] ROUTE: Purge clones on other trees when deleting a route.

Based on MIPL2 kernel patch.

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: Ville Nuorvala <vnuorval@tcs.hut.fi
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 12 insertions, 2 deletions

diff --git a/net/ipv6/ip6_fib.c b/net/ipv6/ip6_fib.c
index 6536e33d8353..f0fdaf182b3f 100644
--- a/net/ipv6/ip6_fib.c
+++ b/net/ipv6/ip6_fib.c
@@ -1169,8 +1169,18 @@ int fib6_del(struct rt6_info *rt, struct nl_info *info)
 
         BUG_TRAP(fn->fn_flags&RTN_RTINFO);
 
-        if (!(rt->rt6i_flags&RTF_CACHE))
-                fib6_prune_clones(fn, rt);
+        if (!(rt->rt6i_flags&RTF_CACHE)) {
+                struct fib6_node *pn = fn;
+#ifdef CONFIG_IPV6_SUBTREES
+                /* clones of this route might be in another subtree */
+                if (rt->rt6i_src.plen) {
+                        while (!(pn->fn_flags&RTN_ROOT))
+                                pn = pn->parent;
+                        pn = pn->parent;
+                }
+#endif
+                fib6_prune_clones(pn, rt);
+        }
 
         /*
          *      Walk the leaf entries looking for ourself