This is a note to let you know that I've just added the patch titled
gtp: do not confirm neighbor when do pmtu update
to the 4.19-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
gtp-do-not-confirm-neighbor-when-do-pmtu-update.patch
and it can be found in the queue-4.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Wed 01 Jan 2020 10:36:29 PM CET
From: Hangbin Liu <liuhangbin@xxxxxxxxx>
Date: Sun, 22 Dec 2019 10:51:11 +0800
Subject: gtp: do not confirm neighbor when do pmtu update
From: Hangbin Liu <liuhangbin@xxxxxxxxx>
[ Upstream commit 6e9105c73f8d2163d12d5dfd762fd75483ed30f5 ]
When do IPv6 tunnel PMTU update and calls __ip6_rt_update_pmtu() in the end,
we should not call dst_confirm_neigh() as there is no two-way communication.
Although GTP only support ipv4 right now, and __ip_rt_update_pmtu() does not
call dst_confirm_neigh(), we still set it to false to keep consistency with
IPv6 code.
v5: No change.
v4: No change.
v3: Do not remove dst_confirm_neigh, but add a new bool parameter in
dst_ops.update_pmtu to control whether we should do neighbor confirm.
Also split the big patch to small ones for each area.
v2: Remove dst_confirm_neigh in __ip6_rt_update_pmtu.
Reviewed-by: Guillaume Nault <gnault@xxxxxxxxxx>
Acked-by: David Ahern <dsahern@xxxxxxxxx>
Signed-off-by: Hangbin Liu <liuhangbin@xxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/gtp.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/net/gtp.c
+++ b/drivers/net/gtp.c
@@ -545,7 +545,7 @@ static int gtp_build_skb_ip4(struct sk_b
mtu = dst_mtu(&rt->dst);
}
- rt->dst.ops->update_pmtu(&rt->dst, NULL, skb, mtu, true);
+ rt->dst.ops->update_pmtu(&rt->dst, NULL, skb, mtu, false);
if (!skb_is_gso(skb) && (iph->frag_off & htons(IP_DF)) &&
mtu < ntohs(iph->tot_len)) {
Patches currently in stable-queue which might be from liuhangbin@xxxxxxxxx are
queue-4.19/sit-do-not-confirm-neighbor-when-do-pmtu-update.patch
queue-4.19/net-dst-add-new-function-skb_dst_update_pmtu_no_confirm.patch
queue-4.19/vti-do-not-confirm-neighbor-when-do-pmtu-update.patch
queue-4.19/net-dst-do-not-confirm-neighbor-for-vxlan-and-geneve-pmtu-update.patch
queue-4.19/gtp-do-not-confirm-neighbor-when-do-pmtu-update.patch
queue-4.19/ip6_gre-do-not-confirm-neighbor-when-do-pmtu-update.patch
queue-4.19/net-add-bool-confirm_neigh-parameter-for-dst_ops.update_pmtu.patch
queue-4.19/tunnel-do-not-confirm-neighbor-when-do-pmtu-update.patch
