netdev - [PATCHv5 net 4/8] net/dst: add new function skb_dst_update_pmtu_no

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Sun, 22 Dec 2019 10:51:12 +0800
From:   Hangbin Liu <liuhangbin@...il.com>
To:     netdev@...r.kernel.org
Cc:     Julian Anastasov <ja@....bg>,
        Marcelo Ricardo Leitner <marcelo.leitner@...il.com>,
        David Ahern <dsahern@...il.com>,
        Eric Dumazet <edumazet@...gle.com>,
        Guillaume Nault <gnault@...hat.com>,
        David Miller <davem@...emloft.net>,
        Pablo Neira <pablo@...filter.org>,
        Stephen Hemminger <stephen@...workplumber.org>,
        Alexey Kodanev <alexey.kodanev@...cle.com>,
        Hangbin Liu <liuhangbin@...il.com>
Subject: [PATCHv5 net 4/8] net/dst: add new function skb_dst_update_pmtu_no_confirm

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@...hat.com>
Acked-by: David Ahern <dsahern@...il.com>
Signed-off-by: Hangbin Liu <liuhangbin@...il.com>
---
 include/net/dst.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/include/net/dst.h b/include/net/dst.h
index 593630e0e076..dc7cc1f1051c 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)
-- 
2.19.2