From 24764f8d3c316a3c58b51140d8e489e98e7ffdcc Mon Sep 17 00:00:00 2001
From: Arseniy Krasnov <AVKrasnov@sberdevices.ru>
Date: Fri, 19 Aug 2022 05:27:34 +0000
Subject: [PATCH] hv_sock: disable SO_RCVLOWAT support
For Hyper-V it is quiet difficult to support this socket option,due to
transport internals, so disable it.
Signed-off-by: Arseniy Krasnov <AVKrasnov@sberdevices.ru>
Reviewed-by: Dexuan Cui <decui@microsoft.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
---
net/vmw_vsock/hyperv_transport.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/net/vmw_vsock/hyperv_transport.c b/net/vmw_vsock/hyperv_transport.c
index fd98229e3db30..59c3e26970690 100644
--- a/net/vmw_vsock/hyperv_transport.c
+++ b/net/vmw_vsock/hyperv_transport.c
@@ -815,6 +815,12 @@ int hvs_notify_send_post_enqueue(struct vsock_sock *vsk, ssize_t written,
return 0;
}
+static
+int hvs_set_rcvlowat(struct vsock_sock *vsk, int val)
+{
+ return -EOPNOTSUPP;
+}
+
static struct vsock_transport hvs_transport = {
.module = THIS_MODULE,
@@ -850,6 +856,7 @@ static struct vsock_transport hvs_transport = {
.notify_send_pre_enqueue = hvs_notify_send_pre_enqueue,
.notify_send_post_enqueue = hvs_notify_send_post_enqueue,
+ .set_rcvlowat = hvs_set_rcvlowat
};
static bool hvs_check_transport(struct vsock_sock *vsk)
--
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