This is a note to let you know that I've just added the patch titled
net/dst: do not confirm neighbor for vxlan and geneve 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:
net-dst-do-not-confirm-neighbor-for-vxlan-and-geneve-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 10:51:16 +0800
Subject: net/dst: do not confirm neighbor for vxlan and geneve pmtu update
From: Hangbin Liu <liuhangbin@xxxxxxxxx>
[ Upstream commit f081042d128a0c7acbd67611def62e1b52e2d294 ]
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.
So disable the neigh confirm for vxlan and geneve pmtu update.
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.
Fixes: a93bf0ff4490 ("vxlan: update skb dst pmtu on tx path")
Fixes: 52a589d51f10 ("geneve: update skb dst pmtu on tx path")
Reviewed-by: Guillaume Nault <gnault@xxxxxxxxxx>
Tested-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>
---
include/net/dst.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/include/net/dst.h
+++ b/include/net/dst.h
@@ -546,7 +546,7 @@ static inline void skb_tunnel_check_pmtu
u32 encap_mtu = dst_mtu(encap_dst);
if (skb->len > encap_mtu - headroom)
- skb_dst_update_pmtu(skb, encap_mtu - headroom);
+ skb_dst_update_pmtu_no_confirm(skb, encap_mtu - headroom);
}
#endif /* _NET_DST_H */
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
