vmm: Enhance boot with info!() level messages

These messages are predominantly during the boot process but will also
occur during events such as hotplug.

These cover all the significant steps of the boot and can be helpful for
diagnosing performance and functionality issues during the boot.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>

vmm/src/api/mod.rs

@@ -163,37 +163,37 @@ pub struct VmmPingResponse {
     pub version: String,
 }
 
-#[derive(Clone, Deserialize, Serialize, Default)]
+#[derive(Clone, Deserialize, Serialize, Default, Debug)]
 pub struct VmResizeData {
     pub desired_vcpus: Option<u8>,
     pub desired_ram: Option<u64>,
     pub desired_balloon: Option<u64>,
 }
 
-#[derive(Clone, Deserialize, Serialize, Default)]
+#[derive(Clone, Deserialize, Serialize, Default, Debug)]
 pub struct VmResizeZoneData {
     pub id: String,
     pub desired_ram: u64,
 }
 
-#[derive(Clone, Deserialize, Serialize, Default)]
+#[derive(Clone, Deserialize, Serialize, Default, Debug)]
 pub struct VmRemoveDeviceData {
     pub id: String,
 }
 
-#[derive(Clone, Deserialize, Serialize, Default)]
+#[derive(Clone, Deserialize, Serialize, Default, Debug)]
 pub struct VmSnapshotConfig {
     /// The snapshot destination URL
     pub destination_url: String,
 }
 
-#[derive(Clone, Deserialize, Serialize, Default)]
+#[derive(Clone, Deserialize, Serialize, Default, Debug)]
 pub struct VmReceiveMigrationData {
     /// URL for the reception of migration state
     pub receiver_url: String,
 }
 
-#[derive(Clone, Deserialize, Serialize, Default)]
+#[derive(Clone, Deserialize, Serialize, Default, Debug)]
 pub struct VmSendMigrationData {
     /// URL to migrate the VM to
     pub destination_url: String,
@@ -217,6 +217,7 @@ pub enum ApiResponsePayload {
 pub type ApiResponse = std::result::Result<ApiResponsePayload, ApiError>;
 
 #[allow(clippy::large_enum_variant)]
+#[derive(Debug)]
 pub enum ApiRequest {
     /// Create the virtual machine. This request payload is a VM configuration
     /// (VmConfig).