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authorKalash Nainwal <kalash@arista.com>2022-02-11 01:09:35 +0300
committerDavid S. Miller <davem@davemloft.net>2022-02-14 14:15:37 +0300
commit806c37ddcf286665adce5c3a99b5fe4424cbf9fe (patch)
tree3811afe482af9e67fc6df748a01989cc9017af5e /net/ipv6
parent4ddc844eb81da59bfb816d8d52089aba4e59e269 (diff)
downloadlinux-806c37ddcf286665adce5c3a99b5fe4424cbf9fe.tar.xz
Generate netlink notification when default IPv6 route preference changes
Generate RTM_NEWROUTE netlink notification when the route preference changes on an existing kernel generated default route in response to RA messages. Currently netlink notifications are generated only when this route is added or deleted but not when the route preference changes, which can cause userspace routing application state to go out of sync with kernel. Signed-off-by: Kalash Nainwal <kalash@arista.com> Reviewed-by: David Ahern <dsahern@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6')
-rw-r--r--net/ipv6/ndisc.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c
index f03b597e4121..1c06d0cd02f7 100644
--- a/net/ipv6/ndisc.c
+++ b/net/ipv6/ndisc.c
@@ -1337,8 +1337,12 @@ static void ndisc_router_discovery(struct sk_buff *skb)
return;
}
neigh->flags |= NTF_ROUTER;
- } else if (rt) {
+ } else if (rt && IPV6_EXTRACT_PREF(rt->fib6_flags) != pref) {
+ struct nl_info nlinfo = {
+ .nl_net = net,
+ };
rt->fib6_flags = (rt->fib6_flags & ~RTF_PREF_MASK) | RTF_PREF(pref);
+ inet6_rt_notify(RTM_NEWROUTE, rt, &nlinfo, NLM_F_REPLACE);
}
if (rt)