[PATCH 07/17] net/tls: handle MSG_EOR for tls_sw TX flow

[Hannes Reinecke <hare@suse.de>]

tls_sw_sendmsg() / tls_do_sw_sendpage() already checks for an
'end of record' by evaluating the 'MSG_MORE' / 'MSG_SENDPAGE_NOTLAST'
setting. So MSG_EOR can easily be handled by treating it
as the opposite of MSG_MORE / MSG_SENDPAGE_NOTLAST.

Signed-off-by: Hannes Reinecke <hare@suse.de>
Cc: Jakub Kicinski <kuba@kernel.org>
---
 net/tls/tls_sw.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/net/tls/tls_sw.c b/net/tls/tls_sw.c
index 827292e29f99..9bee2dcd55bf 100644
--- a/net/tls/tls_sw.c
+++ b/net/tls/tls_sw.c
@@ -953,9 +953,12 @@ int tls_sw_sendmsg(struct sock *sk, struct msghdr *msg, size_t size)
 	int pending;
 
 	if (msg->msg_flags & ~(MSG_MORE | MSG_DONTWAIT | MSG_NOSIGNAL |
-			       MSG_CMSG_COMPAT))
+			       MSG_EOR | MSG_CMSG_COMPAT))
 		return -EOPNOTSUPP;
 
+	if (msg->msg_flags & MSG_EOR)
+		eor = true;
+
 	ret = mutex_lock_interruptible(&tls_ctx->tx_lock);
 	if (ret)
 		return ret;
@@ -1173,6 +1176,8 @@ static int tls_sw_do_sendpage(struct sock *sk, struct page *page,
 	bool eor;
 
 	eor = !(flags & MSG_SENDPAGE_NOTLAST);
+	if (flags & MSG_EOR)
+		eor = true;
 	sk_clear_bit(SOCKWQ_ASYNC_NOSPACE, sk);
 
 	/* Call the sk_stream functions to manage the sndbuf mem. */
@@ -1274,7 +1279,7 @@ static int tls_sw_do_sendpage(struct sock *sk, struct page *page,
 int tls_sw_sendpage_locked(struct sock *sk, struct page *page,
 			   int offset, size_t size, int flags)
 {
-	if (flags & ~(MSG_MORE | MSG_DONTWAIT | MSG_NOSIGNAL |
+	if (flags & ~(MSG_MORE | MSG_DONTWAIT | MSG_NOSIGNAL | MSG_EOR |
 		      MSG_SENDPAGE_NOTLAST | MSG_SENDPAGE_NOPOLICY |
 		      MSG_NO_SHARED_FRAGS))
 		return -EOPNOTSUPP;
@@ -1288,7 +1293,7 @@ int tls_sw_sendpage(struct sock *sk, struct page *page,
 	struct tls_context *tls_ctx = tls_get_ctx(sk);
 	int ret;
 
-	if (flags & ~(MSG_MORE | MSG_DONTWAIT | MSG_NOSIGNAL |
+	if (flags & ~(MSG_MORE | MSG_DONTWAIT | MSG_NOSIGNAL | MSG_EOR |
 		      MSG_SENDPAGE_NOTLAST | MSG_SENDPAGE_NOPOLICY))
 		return -EOPNOTSUPP;
 
-- 
2.35.3