blob: 966f1c77c5c154f1d43632c1694569ac8d8053e2 [file] [log] [blame]
From f440d431575ca7c8707f0af6c1cce92a144f6ecd Mon Sep 17 00:00:00 2001
From: Hangbin Liu <>
Date: Sun, 22 Dec 2019 10:51:12 +0800
Subject: [PATCH] net/dst: add new function skb_dst_update_pmtu_no_confirm
commit 07dc35c6e3cc3c001915d05f5bf21f80a39a0970 upstream.
Add a new function skb_dst_update_pmtu_no_confirm() for callers who need
update pmtu but should not do neighbor confirm.
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 <>
Acked-by: David Ahern <>
Signed-off-by: Hangbin Liu <>
Signed-off-by: David S. Miller <>
Signed-off-by: Paul Gortmaker <>
diff --git a/include/net/dst.h b/include/net/dst.h
index a01b194234bf..dfd899aa8c69 100644
--- a/include/net/dst.h
+++ b/include/net/dst.h
@@ -519,6 +519,15 @@ static inline void skb_dst_update_pmtu(struct sk_buff *skb, u32 mtu)
dst->ops->update_pmtu(dst, NULL, skb, mtu, true);
+/* update dst pmtu but not do neighbor confirm */
+static inline void skb_dst_update_pmtu_no_confirm(struct sk_buff *skb, u32 mtu)
+ struct dst_entry *dst = skb_dst(skb);
+ if (dst && dst->ops->update_pmtu)
+ dst->ops->update_pmtu(dst, NULL, skb, mtu, false);
static inline void skb_tunnel_check_pmtu(struct sk_buff *skb,
struct dst_entry *encap_dst,
int headroom)