netdev - [PATCH net-next v4 2/8] net: skb: introduce __skb_queue_purge

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Message-Id: <20220617100514.7230-3-imagedong@tencent.com>
Date:   Fri, 17 Jun 2022 18:05:08 +0800
From:   menglong8.dong@...il.com
To:     edumazet@...gle.com
Cc:     rostedt@...dmis.org, mingo@...hat.com, davem@...emloft.net,
        yoshfuji@...ux-ipv6.org, dsahern@...nel.org, kuba@...nel.org,
        pabeni@...hat.com, imagedong@...cent.com, kafai@...com,
        talalahmad@...gle.com, keescook@...omium.org,
        dongli.zhang@...cle.com, linux-kernel@...r.kernel.org,
        netdev@...r.kernel.org, Jiang Biao <benbjiang@...cent.com>,
        Hao Peng <flyingpeng@...cent.com>
Subject: [PATCH net-next v4 2/8] net: skb: introduce __skb_queue_purge_reason()

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

Introduce __skb_queue_purge_reason() to empty a skb list with drop
reason and make __skb_queue_purge() an inline call to it.

Reviewed-by: Jiang Biao <benbjiang@...cent.com>
Reviewed-by: Hao Peng <flyingpeng@...cent.com>
Signed-off-by: Menglong Dong <imagedong@...cent.com>
---
 include/linux/skbuff.h | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 82edf0359ab3..8d5445c3d3e7 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -3020,18 +3020,24 @@ static inline int skb_orphan_frags_rx(struct sk_buff *skb, gfp_t gfp_mask)
 }
 
 /**
- *	__skb_queue_purge - empty a list
+ *	__skb_queue_purge_reason - empty a list with specific drop reason
  *	@list: list to empty
+ *	@reason: drop reason
  *
  *	Delete all buffers on an &sk_buff list. Each buffer is removed from
  *	the list and one reference dropped. This function does not take the
  *	list lock and the caller must hold the relevant locks to use it.
  */
-static inline void __skb_queue_purge(struct sk_buff_head *list)
+static inline void __skb_queue_purge_reason(struct sk_buff_head *list,
+					    enum skb_drop_reason reason)
 {
 	struct sk_buff *skb;
 	while ((skb = __skb_dequeue(list)) != NULL)
-		kfree_skb(skb);
+		kfree_skb_reason(skb, reason);
+}
+static inline void __skb_queue_purge(struct sk_buff_head *list)
+{
+	__skb_queue_purge_reason(list, SKB_DROP_REASON_NOT_SPECIFIED);
 }
 void skb_queue_purge(struct sk_buff_head *list);
 
-- 
2.36.1