netdev - [PATCH net-next v4 3/8] net: sock: introduce sk_stream_kill_queues

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Message-Id: <20220617100514.7230-4-imagedong@tencent.com>
Date:   Fri, 17 Jun 2022 18:05:09 +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 3/8] net: sock: introduce sk_stream_kill_queues_reason()

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

Introduce the function sk_stream_kill_queues_reason() and make the
origin sk_stream_kill_queues() 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/net/sock.h | 8 +++++++-
 net/core/stream.c  | 7 ++++---
 2 files changed, 11 insertions(+), 4 deletions(-)

diff --git a/include/net/sock.h b/include/net/sock.h
index 657873e2d90f..208c87807f23 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -1139,12 +1139,18 @@ int sk_stream_wait_connect(struct sock *sk, long *timeo_p);
 int sk_stream_wait_memory(struct sock *sk, long *timeo_p);
 void sk_stream_wait_close(struct sock *sk, long timeo_p);
 int sk_stream_error(struct sock *sk, int flags, int err);
-void sk_stream_kill_queues(struct sock *sk);
+void sk_stream_kill_queues_reason(struct sock *sk,
+				  enum skb_drop_reason reason);
 void sk_set_memalloc(struct sock *sk);
 void sk_clear_memalloc(struct sock *sk);
 
 void __sk_flush_backlog(struct sock *sk);
 
+static inline void sk_stream_kill_queues(struct sock *sk)
+{
+	sk_stream_kill_queues_reason(sk, SKB_DROP_REASON_NOT_SPECIFIED);
+}
+
 static inline bool sk_flush_backlog(struct sock *sk)
 {
 	if (unlikely(READ_ONCE(sk->sk_backlog.tail))) {
diff --git a/net/core/stream.c b/net/core/stream.c
index 06b36c730ce8..a562b23a1a6e 100644
--- a/net/core/stream.c
+++ b/net/core/stream.c
@@ -190,10 +190,11 @@ int sk_stream_error(struct sock *sk, int flags, int err)
 }
 EXPORT_SYMBOL(sk_stream_error);
 
-void sk_stream_kill_queues(struct sock *sk)
+void sk_stream_kill_queues_reason(struct sock *sk,
+				  enum skb_drop_reason reason)
 {
 	/* First the read buffer. */
-	__skb_queue_purge(&sk->sk_receive_queue);
+	__skb_queue_purge_reason(&sk->sk_receive_queue, reason);
 
 	/* Next, the write queue. */
 	WARN_ON(!skb_queue_empty(&sk->sk_write_queue));
@@ -209,4 +210,4 @@ void sk_stream_kill_queues(struct sock *sk)
 	 * have gone away, only the net layer knows can touch it.
 	 */
 }
-EXPORT_SYMBOL(sk_stream_kill_queues);
+EXPORT_SYMBOL(sk_stream_kill_queues_reason);
-- 
2.36.1