[RFC v2 07/10] vhost: add net status feature to VDUSE

Eugenio Pérez
2026-03-10T19:17:45Z

Enable the VIRTIO_NET_F_STATUS feature for VDUSE devices.
This allows the device to report link status (e.g.,
VIRTIO_NET_S_LINK_UP). It also allows the device to signal the driver
that it needs to send gratuitous ARP with VIRTIO_NET_S_ANNOUNCE.

Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>
Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
---
v2:
* Move the start and last declarations in the braces as gcc 8 does not
like them interleaved with statements. Actually, I think the move was
a mistake in the first version.
https://mails.dpdk.org/archives/test-report/2026-February/958175.html
---
lib/vhost/vduse.c | 1 +
lib/vhost/vduse.h | 3 ++-
2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/vhost/vduse.c b/lib/vhost/vduse.c
index 80020d3d5413..54fe6cf35bc6 100644
--- a/lib/vhost/vduse.c
+++ b/lib/vhost/vduse.c
@@ -801,6 +801,7 @@ vduse_device_create(const char *path, bool compliant_ol_flags, bool extbuf, bool
goto out_ctrl_close;
}

+ vnet_config.status = VIRTIO_NET_S_LINK_UP;
vnet_config.max_virtqueue_pairs = max_queue_pairs;
memset(dev_config, 0, sizeof(struct vduse_dev_config));

diff --git a/lib/vhost/vduse.h b/lib/vhost/vduse.h
index b2515bb9df76..d697f85be5cc 100644
--- a/lib/vhost/vduse.h
+++ b/lib/vhost/vduse.h
@@ -7,7 +7,8 @@

#include "vhost.h"

-#define VDUSE_NET_SUPPORTED_FEATURES VIRTIO_NET_SUPPORTED_FEATURES
+#define VDUSE_NET_SUPPORTED_FEATURES (VIRTIO_NET_SUPPORTED_FEATURES | \
+ (1ULL << VIRTIO_NET_F_STATUS))

int vduse_device_create(const char *path, bool compliant_ol_flags, bool extbuf, bool linearbuf);
int vduse_device_destroy(const char *path);
--
2.53.0