dbus: rauc: allow configuring the *_criteria in channel files

The native RAUC polling feature allows configuring when a new update
bundle is even considered as an update candidate (`candidate_criteria`),
when it is considered for automatic installation (`install_criteria`)
and under which conditions to auto-boot into another slot after
installation (`reboot_criteria`).

The defaults we have chosen in previous commits generally make sense,
but allow users with custom update channels to customize them if they
deem it necessary.

Signed-off-by: Leonard Göhrs <[email protected]>

Author: hnez

openapi.yaml

@@ -1166,6 +1166,12 @@ components:
             type: boolean
           force_auto_install:
             type: boolean
+          candidate_criteria:
+            type: string
+          install_criteria:
+            type: string
+          reboot_criteria:
+            type: string
 
     ServiceStatus:
       type: object

src/dbus/rauc/system_conf.rs

@@ -45,14 +45,25 @@ fn poll_section(
         writeln!(&mut section, "interval-sec={}", interval.as_secs())?;
     }
 
-    writeln!(&mut section, "candidate-criteria=different-version")?;
+    let candidate_criteria = primary_channel
+        .candidate_criteria
+        .as_deref()
+        .unwrap_or("different-version");
+
+    writeln!(&mut section, "candidate-criteria={candidate_criteria}")?;
 
     if auto_install {
-        writeln!(&mut section, "install-criteria=different-version")?;
-        writeln!(
-            &mut section,
-            "reboot-criteria=updated-slots;updated-artifacts"
-        )?;
+        let install_criteria = primary_channel
+            .install_criteria
+            .as_deref()
+            .unwrap_or("different-version");
+        let reboot_criteria = primary_channel
+            .reboot_criteria
+            .as_deref()
+            .unwrap_or("updated-slots;updated-artifacts");
+
+        writeln!(&mut section, "install-criteria={install_criteria}")?;
+        writeln!(&mut section, "reboot-criteria={reboot_criteria}")?;
         writeln!(&mut section, "reboot-cmd=systemctl reboot")?;
     }
 

src/dbus/rauc/update_channels.rs

@@ -56,6 +56,9 @@ pub struct Channel {
     pub bundle: Option<UpstreamBundle>,
     pub force_polling: Option<bool>,
     pub force_auto_install: Option<bool>,
+    pub candidate_criteria: Option<String>,
+    pub install_criteria: Option<String>,
+    pub reboot_criteria: Option<String>,
 }
 
 #[derive(Serialize, Deserialize, Clone, PartialEq)]
@@ -70,6 +73,9 @@ pub struct ChannelFile {
     pub polling_interval: Option<String>,
     pub force_polling: Option<bool>,
     pub force_auto_install: Option<bool>,
+    pub candidate_criteria: Option<String>,
+    pub install_criteria: Option<String>,
+    pub reboot_criteria: Option<String>,
 }
 
 #[cfg(not(feature = "demo_mode"))]
@@ -151,6 +157,9 @@ impl Channel {
             bundle: None,
             force_polling: channel_file.force_polling,
             force_auto_install: channel_file.force_auto_install,
+            candidate_criteria: channel_file.candidate_criteria,
+            install_criteria: channel_file.install_criteria,
+            reboot_criteria: channel_file.reboot_criteria,
         };
 
         ch.update_enabled();