netdev - [PATCH net] vsock/vmci: convert VMCI error code to -ENOMEM on send

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Date:   Fri, 31 Mar 2023 10:56:41 +0300
From:   Arseniy Krasnov <avkrasnov@...rdevices.ru>
To:     Stefan Hajnoczi <stefanha@...hat.com>,
        Stefano Garzarella <sgarzare@...hat.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Bobby Eshleman <bobby.eshleman@...edance.com>,
        Bryan Tan <bryantan@...are.com>, Vishnu Dasa <vdasa@...are.com>
CC:     <kvm@...r.kernel.org>, <virtualization@...ts.linux-foundation.org>,
        <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <kernel@...rdevices.ru>, <oxffffaa@...il.com>,
        <avkrasnov@...rdevices.ru>, <pv-drivers@...are.com>
Subject: [PATCH net] vsock/vmci: convert VMCI error code to -ENOMEM on send

This adds conversion of VMCI specific error code to general -ENOMEM. It
is needed, because af_vsock.c passes error value returned from transport
to the user, which does not expect to get VMCI_ERROR_* values.

Fixes: c43170b7e157 ("vsock: return errors other than -ENOMEM to socket")
Signed-off-by: Arseniy Krasnov <AVKrasnov@...rdevices.ru>
Reviewed-by: Vishnu Dasa <vdasa@...are.com>
Reviewed-by: Stefano Garzarella <sgarzare@...hat.com>
---
 net/vmw_vsock/vmci_transport.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/net/vmw_vsock/vmci_transport.c b/net/vmw_vsock/vmci_transport.c
index 36eb16a40745..95cc4d79ba29 100644
--- a/net/vmw_vsock/vmci_transport.c
+++ b/net/vmw_vsock/vmci_transport.c
@@ -1842,7 +1842,13 @@ static ssize_t vmci_transport_stream_enqueue(
 	struct msghdr *msg,
 	size_t len)
 {
-	return vmci_qpair_enquev(vmci_trans(vsk)->qpair, msg, len, 0);
+	ssize_t err;
+
+	err = vmci_qpair_enquev(vmci_trans(vsk)->qpair, msg, len, 0);
+	if (err < 0)
+		err = -ENOMEM;
+
+	return err;
 }
 
 static s64 vmci_transport_stream_has_data(struct vsock_sock *vsk)
-- 
2.25.1