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net/dst: add new function skb_dst_update_pmtu_no_confirm

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[ Upstream commit 07dc35c6e3 ]

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>
This commit is contained in:
Hangbin Liu 2019-12-22 10:51:12 +08:00 committed by Greg Kroah-Hartman
parent 9ef0de68ed
commit dba3ed5646
1 changed files with 9 additions and 0 deletions
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9
include/net/dst.h
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@ -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);
}
/* 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)