netdev - [PATCH net-next 1/9] net: skb: introduce try_kfree

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Date:   Sat, 29 Oct 2022 21:09:49 +0800
From:   menglong8.dong@...il.com
To:     edumazet@...gle.com, kuba@...nel.org
Cc:     davem@...emloft.net, pabeni@...hat.com, yoshfuji@...ux-ipv6.org,
        dsahern@...nel.org, imagedong@...cent.com, kafai@...com,
        asml.silence@...il.com, keescook@...omium.org,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: [PATCH net-next 1/9] net: skb: introduce try_kfree_skb()

From: Menglong Dong <imagedong@...cent.com>

In order to simply the code, introduce try_kfree_skb(), which allow
SKB_NOT_DROPPED_YET to be passed. When the reason is SKB_NOT_DROPPED_YET,
consume_skb() will be called to free the skb normally. Otherwise,
kfree_skb_reason() will be called.

Signed-off-by: Menglong Dong <imagedong@...cent.com>
---
 include/linux/skbuff.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 59c9fd55699d..f722accc054e 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -1236,6 +1236,15 @@ static inline void consume_skb(struct sk_buff *skb)
 }
 #endif
 
+static inline void try_kfree_skb(struct sk_buff *skb,
+				 enum skb_drop_reason reason)
+{
+	if (reason != SKB_NOT_DROPPED_YET)
+		kfree_skb_reason(skb, reason);
+	else
+		consume_skb(skb);
+}
+
 void __consume_stateless_skb(struct sk_buff *skb);
 void  __kfree_skb(struct sk_buff *skb);
 extern struct kmem_cache *skbuff_head_cache;
-- 
2.37.2