netdev - [PATCH net 1/2] vsock: add half-closed socket details in the implementation notes

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Message-Id: <20191011130758.22134-2-sgarzare@redhat.com>
Date:   Fri, 11 Oct 2019 15:07:57 +0200
From:   Stefano Garzarella <sgarzare@...hat.com>
To:     netdev@...r.kernel.org
Cc:     virtualization@...ts.linux-foundation.org,
        Jorgen Hansen <jhansen@...are.com>,
        "David S. Miller" <davem@...emloft.net>,
        "Michael S. Tsirkin" <mst@...hat.com>,
        Stefan Hajnoczi <stefanha@...hat.com>,
        Adit Ranadive <aditr@...are.com>,
        Jason Wang <jasowang@...hat.com>, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH net 1/2] vsock: add half-closed socket details in the implementation notes

vmci_transport never allowed half-closed socket on the host side.
Since we want to have the same behaviour across all transports, we
add a section in the "Implementation notes".

Cc: Jorgen Hansen <jhansen@...are.com>
Cc: Adit Ranadive <aditr@...are.com>
Signed-off-by: Stefano Garzarella <sgarzare@...hat.com>
---
 net/vmw_vsock/af_vsock.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/net/vmw_vsock/af_vsock.c b/net/vmw_vsock/af_vsock.c
index 2ab43b2bba31..27df57c2024b 100644
--- a/net/vmw_vsock/af_vsock.c
+++ b/net/vmw_vsock/af_vsock.c
@@ -83,6 +83,10 @@
  *   TCP_ESTABLISHED - connected
  *   TCP_CLOSING - disconnecting
  *   TCP_LISTEN - listening
+ *
+ * - Half-closed socket is supported only on the guest side. recv() on the host
+ * side should return EOF when the guest closes a connection, also if some
+ * data is still in the receive queue.
  */
 
 #include <linux/types.h>
-- 
2.21.0