feat(xen): update xenclient and xenplatform to the latest structure (#433)

crates/xen/xenclient/src/tx/channel.rs

@@ -0,0 +1,89 @@
+use xenplatform::domain::PlatformDomainInfo;
+
+use super::{DeviceConfig, DeviceDescription, DeviceResult, XenTransaction};
+use crate::error::{Error, Result};
+
+pub struct ChannelDeviceConfig {
+    backend_type: String,
+    default_console: bool,
+    default_console_options: Option<(u32, u64)>,
+    backend_initialized: bool,
+}
+
+impl Default for ChannelDeviceConfig {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
+impl ChannelDeviceConfig {
+    pub fn new() -> Self {
+        Self {
+            backend_type: "console".to_string(),
+            default_console: false,
+            default_console_options: None,
+            backend_initialized: false,
+        }
+    }
+
+    pub fn backend_type(&mut self, backend_type: impl AsRef<str>) -> &mut Self {
+        self.backend_type = backend_type.as_ref().to_string();
+        self
+    }
+
+    pub fn default_console(&mut self) -> &mut Self {
+        self.default_console = true;
+        self
+    }
+
+    pub fn backend_initialized(&mut self) -> &mut Self {
+        self.backend_initialized = true;
+        self
+    }
+
+    pub fn done(self) -> Self {
+        self
+    }
+
+    pub async fn prepare(&mut self, platform: &PlatformDomainInfo) -> Result<()> {
+        if self.default_console {
+            self.default_console_options = Some((platform.console_evtchn, platform.console_mfn));
+        }
+        Ok(())
+    }
+}
+
+#[async_trait::async_trait]
+impl DeviceConfig for ChannelDeviceConfig {
+    type Result = DeviceResult;
+
+    async fn add_to_transaction(&self, tx: &XenTransaction) -> Result<DeviceResult> {
+        let id = tx.assign_next_devid().await?;
+        let mut device = DeviceDescription::new("console", &self.backend_type);
+        device
+            .add_backend_bool("online", true)
+            .add_backend_item("protocol", "vt100")
+            .add_backend_item("type", &self.backend_type)
+            .add_backend_item("state", if self.backend_initialized { 4 } else { 1 });
+
+        if self.default_console {
+            device.special_frontend_path("console");
+            let (port, ring_ref) = self
+                .default_console_options
+                .as_ref()
+                .ok_or_else(|| Error::ParameterMissing("default_console_options"))?;
+            device
+                .add_frontend_item("port", port)
+                .add_frontend_item("ring-ref", ring_ref);
+        }
+
+        device
+            .add_frontend_item("limit", 1048576)
+            .add_frontend_item("output", "pty")
+            .add_frontend_item("tty", "")
+            .add_frontend_item("type", &self.backend_type)
+            .add_frontend_item("state", 1);
+        tx.add_device(id, device).await?;
+        Ok(DeviceResult { id })
+    }
+}