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[net-next,12/21] ipv6: fib: Unlink replaced routes from their nodes

Message ID 20170803112831.1831-13-jiri@resnulli.us
State Accepted, archived
Delegated to: David Miller
Headers show

Commit Message

Jiri Pirko Aug. 3, 2017, 11:28 a.m. UTC 
From: Ido Schimmel <idosch@mellanox.com>

When a route is deleted its node pointer is set to NULL to indicate it's
no longer linked to its node. Do the same for routes that are replaced.

This will later allow us to test if a route is still in the FIB by
checking its node pointer instead of its reference count.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
---
 net/ipv6/ip6_fib.c | 2 ++
 1 file changed, 2 insertions(+)
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Patch

diff --git a/net/ipv6/ip6_fib.c b/net/ipv6/ip6_fib.c
index fa27905..fe193b4 100644
--- a/net/ipv6/ip6_fib.c
+++ b/net/ipv6/ip6_fib.c
@@ -1019,6 +1019,7 @@  static int fib6_add_rt2node(struct fib6_node *fn, struct rt6_info *rt,
 			fn->fn_flags |= RTN_RTINFO;
 		}
 		nsiblings = iter->rt6i_nsiblings;
+		iter->rt6i_node = NULL;
 		fib6_purge_rt(iter, fn, info->nl_net);
 		rt6_release(iter);
 
@@ -1031,6 +1032,7 @@  static int fib6_add_rt2node(struct fib6_node *fn, struct rt6_info *rt,
 					break;
 				if (rt6_qualify_for_ecmp(iter)) {
 					*ins = iter->dst.rt6_next;
+					iter->rt6i_node = NULL;
 					fib6_purge_rt(iter, fn, info->nl_net);
 					rt6_release(iter);
 					nsiblings--;