runtime-rs: Simplify VhostUserType enum

Remove unused string parameter from each item.

Fixes: #8625

Signed-off-by: Xuewei Niu <niuxuewei.nxw@antgroup.com>

src/runtime-rs/crates/hypervisor/src/device/driver/vhost_user.rs

@@ -6,29 +6,20 @@
 
 use crate::device::pci_path::PciPath;
 
-#[derive(Debug, Clone)]
+#[derive(Debug, Clone, Default)]
 pub enum VhostUserType {
     /// Blk - represents a block vhostuser device type
-    /// "vhost-user-blk-pci"
-    Blk(String),
+    #[default]
+    Blk,
 
     /// SCSI - represents SCSI based vhost-user type
-    /// "vhost-user-scsi-pci"
-    SCSI(String),
+    SCSI,
 
     /// Net - represents Net based vhost-user type
-    /// "virtio-net-pci"
-    Net(String),
+    Net,
 
     /// FS - represents a virtio-fs vhostuser device type
-    /// "vhost-user-fs-pci"
-    FS(String),
-}
-
-impl Default for VhostUserType {
-    fn default() -> Self {
-        VhostUserType::Blk("vhost-user-blk-pci".to_owned())
-    }
+    FS,
 }
 
 #[derive(Debug, Clone, Default)]

src/runtime-rs/crates/resource/src/volume/direct_volumes/spdk_volume.rs

@@ -75,7 +75,7 @@ impl SPDKVolume {
 
         let vhu_blk_config = &mut VhostUserConfig {
             socket_path: device,
-            device_type: VhostUserType::Blk("vhost-user-blk-pci".to_owned()),
+            device_type: VhostUserType::Blk,
             driver_option: block_driver,
             ..Default::default()
         };