Commit dba3ed56 authored Dec 22, 2019 by Hangbin Liu Committed by Greg Kroah-Hartman Jan 04, 2020

net/dst: add new function skb_dst_update_pmtu_no_confirm



[ Upstream commit 07dc35c6e3cc3c001915d05f5bf21f80a39a0970 ]

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 <gnault@redhat.com>
Acked-by: David Ahern <dsahern@gmail.com>
Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent 9ef0de68

include/net/dst.h

+9 −0

Original line number	Original line	Diff line number	Diff line
	@@ -530,6 +530,15 @@ static inline void skb_dst_update_pmtu(struct sk_buff *skb, u32 mtu)
	dst->ops->update_pmtu(dst, NULL, skb, mtu, true);		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,		static inline void skb_tunnel_check_pmtu(struct sk_buff *skb,
	struct dst_entry *encap_dst,		struct dst_entry *encap_dst,
	int headroom)		int headroom)