dbus: rauc: implement forced polling via update channel files

Author: hnez

openapi.yaml

@@ -1162,6 +1162,10 @@ components:
                 type: string,
               newer_than_installed:
                 type: boolean
+          force_polling:
+            type: boolean
+          force_auto_install:
+            type: boolean
 
     ServiceStatus:
       type: object

src/dbus/rauc/system_conf.rs

@@ -65,7 +65,20 @@ pub fn update_system_conf(
     enable_auto_install: bool,
 ) -> std::io::Result<bool> {
     let dynamic_conf = {
-        match poll_section(primary_channel, enable_polling, enable_auto_install) {
+        // Allow force-enabling update polling and automatic installations
+        // via the update channel config file to implement company wide
+        // auto-update policies.
+        let force_polling = primary_channel
+            .and_then(|pc| pc.force_polling)
+            .unwrap_or(false);
+        let force_auto_install = primary_channel
+            .and_then(|pc| pc.force_auto_install)
+            .unwrap_or(false);
+
+        let polling = enable_polling || force_polling;
+        let auto_install = enable_auto_install || force_auto_install;
+
+        match poll_section(primary_channel, polling, auto_install) {
             Ok(Some(ps)) => {
                 // We use the config in /etc as a template ...
                 let static_conf = read_to_string(STATIC_CONF_PATH)?;

src/dbus/rauc/update_channels.rs

@@ -54,6 +54,8 @@ pub struct Channel {
     pub enabled: bool,
     pub primary: bool,
     pub bundle: Option<UpstreamBundle>,
+    pub force_polling: Option<bool>,
+    pub force_auto_install: Option<bool>,
 }
 
 #[derive(Serialize, Deserialize, Clone, PartialEq)]
@@ -66,6 +68,8 @@ pub struct ChannelFile {
     pub description: String,
     pub url: String,
     pub polling_interval: Option<String>,
+    pub force_polling: Option<bool>,
+    pub force_auto_install: Option<bool>,
 }
 
 #[cfg(not(feature = "demo_mode"))]
@@ -145,6 +149,8 @@ impl Channel {
             enabled: false,
             primary: false,
             bundle: None,
+            force_polling: channel_file.force_polling,
+            force_auto_install: channel_file.force_auto_install,
         };
 
         ch.update_enabled();