[PULL v3 19/19] vhost-vsock: SOCK_SEQPACKET feature bit support

["Michael S. Tsirkin" <mst@redhat.com>]

From: Arseny Krasnov <arseny.krasnov@kaspersky.com>

This adds processing of VIRTIO_VSOCK_F_SEQPACKET features bit. Guest
negotiates it with vhost, thus both will know that SOCK_SEQPACKET
supported by peer.

Signed-off-by: Arseny Krasnov <arseny.krasnov@kaspersky.com>
Message-Id: <20210622144747.2949134-1-arseny.krasnov@kaspersky.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 hw/virtio/vhost-vsock.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/hw/virtio/vhost-vsock.c b/hw/virtio/vhost-vsock.c
index 777cafe70d..1b1a5c70ed 100644
--- a/hw/virtio/vhost-vsock.c
+++ b/hw/virtio/vhost-vsock.c
@@ -21,6 +21,11 @@
 #include "hw/virtio/vhost-vsock.h"
 #include "monitor/monitor.h"
 
+const int feature_bits[] = {
+    VIRTIO_VSOCK_F_SEQPACKET,
+    VHOST_INVALID_FEATURE_BIT
+};
+
 static void vhost_vsock_get_config(VirtIODevice *vdev, uint8_t *config)
 {
     VHostVSock *vsock = VHOST_VSOCK(vdev);
@@ -108,8 +113,11 @@ static uint64_t vhost_vsock_get_features(VirtIODevice *vdev,
                                          uint64_t requested_features,
                                          Error **errp)
 {
-    /* No feature bits used yet */
-    return requested_features;
+    VHostVSockCommon *vvc = VHOST_VSOCK_COMMON(vdev);
+
+    virtio_add_feature(&requested_features, VIRTIO_VSOCK_F_SEQPACKET);
+    return vhost_get_features(&vvc->vhost_dev, feature_bits,
+                                requested_features);
 }
 
 static const VMStateDescription vmstate_virtio_vhost_vsock = {
-- 
MST