vduse: enable Virtio-net device type

This patch adds Virtio-net device type to the supported
devices types.

Initialization fails if the device does not support
VIRTIO_F_VERSION_1 feature, in order to guarantee the
configuration space is read-only. It also fails with
-EPERM if the CAP_NET_ADMIN is missing.

Acked-by: Jason Wang <[email protected]>
Reviewed-by: Eugenio Pérez <[email protected]>
Signed-off-by: Maxime Coquelin <[email protected]>
Message-Id: <20240109111025.1320976[email protected]>
Signed-off-by: Michael S. Tsirkin <[email protected]>
Reviewed-by: Xie Yongji <[email protected]>

diff --git a/drivers/vdpa/vdpa_user/vduse_dev.c b/drivers/vdpa/vdpa_user/vduse_dev.c
index ac8b5b52e3dc4023b226d6d7511f51d9a3109d3d..7ae99691efdf9250a2d812e8a7984dcad0ffc7aa 100644 (file)
--- a/drivers/vdpa/vdpa_user/vduse_dev.c
+++ b/drivers/vdpa/vdpa_user/vduse_dev.c
@@ -143,6 +143,7 @@ static struct workqueue_struct *vduse_irq_bound_wq;
 
 static u32 allowed_device_id[] = {
        VIRTIO_ID_BLOCK,
+       VIRTIO_ID_NET,
 };
 
 static inline struct vduse_dev *vdpa_to_vduse(struct vdpa_device *vdpa)
@@ -1720,6 +1721,10 @@ static bool features_is_valid(struct vduse_dev_config *config)
                        (config->features & BIT_ULL(VIRTIO_NET_F_CTRL_VQ)))
                return false;
 
+       if ((config->device_id == VIRTIO_ID_NET) &&
+                       !(config->features & BIT_ULL(VIRTIO_F_VERSION_1)))
+               return false;
+
        return true;
 }
 
@@ -1827,6 +1832,10 @@ static int vduse_create_dev(struct vduse_dev_config *config,
        int ret;
        struct vduse_dev *dev;
 
+       ret = -EPERM;
+       if ((config->device_id == VIRTIO_ID_NET) && !capable(CAP_NET_ADMIN))
+               goto err;
+
        ret = -EEXIST;
        if (vduse_find_dev(config->name))
                goto err;
@@ -2070,6 +2079,7 @@ static const struct vdpa_mgmtdev_ops vdpa_dev_mgmtdev_ops = {
 
 static struct virtio_device_id id_table[] = {
        { VIRTIO_ID_BLOCK, VIRTIO_DEV_ANY_ID },
+       { VIRTIO_ID_NET, VIRTIO_DEV_ANY_ID },
        { 0 },
 };