linux-kernel - [RFC PATCH v1 09/16] af_vsock/virtio: update dequeue callback interface

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Message-ID: <20210628100348.571174-1-arseny.krasnov@kaspersky.com>
Date:   Mon, 28 Jun 2021 13:03:45 +0300
From:   Arseny Krasnov <arseny.krasnov@...persky.com>
To:     Stefan Hajnoczi <stefanha@...hat.com>,
        Stefano Garzarella <sgarzare@...hat.com>,
        "Michael S. Tsirkin" <mst@...hat.com>,
        Jason Wang <jasowang@...hat.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Arseny Krasnov <arseny.krasnov@...persky.com>,
        Jorgen Hansen <jhansen@...are.com>,
        Andra Paraschiv <andraprs@...zon.com>,
        Colin Ian King <colin.king@...onical.com>,
        Norbert Slusarek <nslusarek@....net>
CC:     <kvm@...r.kernel.org>, <virtualization@...ts.linux-foundation.org>,
        <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <oxffffaa@...il.com>
Subject: [RFC PATCH v1 09/16] af_vsock/virtio: update dequeue callback interface

This patch adds 'msg_ready' parameter to dequeue callback, it is
set to true if EOR is found(in case of virtio transport).

This patch contains small changes for both af_vsock and virtio
transport code to avoid build fails with partly applied patchset.

Signed-off-by: Arseny Krasnov <arseny.krasnov@...persky.com>
---
 include/linux/virtio_vsock.h            | 3 ++-
 include/net/af_vsock.h                  | 2 +-
 net/vmw_vsock/af_vsock.c                | 2 +-
 net/vmw_vsock/virtio_transport_common.c | 2 +-
 4 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/include/linux/virtio_vsock.h b/include/linux/virtio_vsock.h
index 719008d4235e..8d34f3d73bbb 100644
--- a/include/linux/virtio_vsock.h
+++ b/include/linux/virtio_vsock.h
@@ -88,7 +88,8 @@ virtio_transport_seqpacket_enqueue(struct vsock_sock *vsk,
 ssize_t
 virtio_transport_seqpacket_dequeue(struct vsock_sock *vsk,
 				   struct msghdr *msg,
-				   int flags);
+				   int flags,
+				   bool *msg_ready);
 s64 virtio_transport_stream_has_data(struct vsock_sock *vsk);
 s64 virtio_transport_stream_has_space(struct vsock_sock *vsk);
 
diff --git a/include/net/af_vsock.h b/include/net/af_vsock.h
index bf5ea1873e6f..1747c0b564ef 100644
--- a/include/net/af_vsock.h
+++ b/include/net/af_vsock.h
@@ -137,7 +137,7 @@ struct vsock_transport {
 
 	/* SEQ_PACKET. */
 	ssize_t (*seqpacket_dequeue)(struct vsock_sock *vsk, struct msghdr *msg,
-				     int flags);
+				     int flags, bool *msg_ready);
 	int (*seqpacket_enqueue)(struct vsock_sock *vsk, struct msghdr *msg,
 				 size_t len);
 	bool (*seqpacket_allow)(u32 remote_cid);
diff --git a/net/vmw_vsock/af_vsock.c b/net/vmw_vsock/af_vsock.c
index 9552f05119f2..ec54e4222cbf 100644
--- a/net/vmw_vsock/af_vsock.c
+++ b/net/vmw_vsock/af_vsock.c
@@ -2027,7 +2027,7 @@ static int __vsock_seqpacket_recvmsg(struct sock *sk, struct msghdr *msg,
 			break;
 		}
 
-		fragment_len = transport->seqpacket_dequeue(vsk, msg, flags);
+		fragment_len = transport->seqpacket_dequeue(vsk, msg, flags, &msg_ready);
 
 		if (fragment_len < 0) {
 			err = -ENOMEM;
diff --git a/net/vmw_vsock/virtio_transport_common.c b/net/vmw_vsock/virtio_transport_common.c
index 319c3345f3e0..9c2bd84ab8e6 100644
--- a/net/vmw_vsock/virtio_transport_common.c
+++ b/net/vmw_vsock/virtio_transport_common.c
@@ -489,7 +489,7 @@ EXPORT_SYMBOL_GPL(virtio_transport_stream_dequeue);
 ssize_t
 virtio_transport_seqpacket_dequeue(struct vsock_sock *vsk,
 				   struct msghdr *msg,
-				   int flags)
+				   int flags, bool *msg_ready)
 {
 	if (flags & MSG_PEEK)
 		return -EOPNOTSUPP;
-- 
2.25.1