From 150730d5a53b1bbb486101b2a5fb82ff0d3f916e Mon Sep 17 00:00:00 2001
From: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Date: Wed, 23 Aug 2006 17:22:55 -0700
Subject: [PATCH] [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>
---
 net/ipv6/ip6_fib.c | 14 ++++++++++++--
 1 file 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
-- 
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