netdev - [PATCH 2/4] net/tls: handle MSG_EOR for tls

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Message-Id: <20230609125153.3919-3-hare@suse.de>
Date: Fri,  9 Jun 2023 14:51:51 +0200
From: Hannes Reinecke <hare@...e.de>
To: Christoph Hellwig <hch@....de>
Cc: Sagi Grimberg <sagi@...mberg.me>,
	Keith Busch <kbusch@...nel.org>,
	linux-nvme@...ts.infradead.org,
	Jakub Kicinski <kuba@...nel.org>,
	netdev@...r.kernel.org,
	Hannes Reinecke <hare@...e.de>
Subject: [PATCH 2/4] net/tls: handle MSG_EOR for tls_device TX flow

tls_push_data() MSG_MORE / MSG_SENDPAGE_NOTLAST, but bails
out on MSG_EOR.
But seeing that MSG_EOR is basically the opposite of
MSG_MORE / MSG_SENDPAGE_NOTLAST this patch adds handling
MSG_EOR by treating it as the negation of MSG_MORE.

Cc: Jakub Kicinski <kuba@...nel.org>
Cc: netdev@...r.kernel.org
Signed-off-by: Hannes Reinecke <hare@...e.de>
---
 net/tls/tls_device.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/net/tls/tls_device.c b/net/tls/tls_device.c
index a7cc4f9faac2..9603a3c9ec24 100644
--- a/net/tls/tls_device.c
+++ b/net/tls/tls_device.c
@@ -449,7 +449,7 @@ static int tls_push_data(struct sock *sk,
 	long timeo;
 
 	if (flags &
-	    ~(MSG_MORE | MSG_DONTWAIT | MSG_NOSIGNAL | MSG_SENDPAGE_NOTLAST))
+	    ~(MSG_MORE | MSG_DONTWAIT | MSG_NOSIGNAL | MSG_SENDPAGE_NOTLAST | MSG_EOR))
 		return -EOPNOTSUPP;
 
 	if (unlikely(sk->sk_err))
@@ -529,6 +529,10 @@ static int tls_push_data(struct sock *sk,
 				more = true;
 				break;
 			}
+			if (flags & MSG_EOR) {
+				more = false;
+				break;
+			}
 
 			done = true;
 		}
@@ -603,6 +607,8 @@ int tls_device_sendpage(struct sock *sk, struct page *page,
 
 	if (flags & MSG_SENDPAGE_NOTLAST)
 		flags |= MSG_MORE;
+	if (flags & MSG_EOR)
+		flags &= ~(MSG_MORE | MSG_SENDPAGE_NOTLAST);
 
 	mutex_lock(&tls_ctx->tx_lock);
 	lock_sock(sk);
-- 
2.35.3