New improved realms daemon implementation

data/com.subgraph.realms.Manager.conf

@@ -7,10 +7,12 @@
 <busconfig>
   <policy user="root">
     <allow own="com.subgraph.realms"/>
+    <allow own="com.subgraph.Realms2"/>
   </policy>
 
   <policy context="default">
     <allow send_destination="com.subgraph.realms"/>
+    <allow send_destination="com.subgraph.Realms2"/>
     <allow send_destination="com.subgraph.realms"
            send_interface="org.freedesktop.DBus.Properties"/>
     <allow send_destination="com.subgraph.realms"

libcitadel/src/realm/events.rs

@@ -12,7 +12,9 @@ use dbus::{Connection, BusType, ConnectionItem, Message, Path};
 use inotify::{Inotify, WatchMask, WatchDescriptor, Event};
 
 pub enum RealmEvent {
+    Starting(Realm),
     Started(Realm),
+    Stopping(Realm),
     Stopped(Realm),
     New(Realm),
     Removed(Realm),
@@ -22,7 +24,9 @@ pub enum RealmEvent {
 impl Display for RealmEvent {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         match self {
+            RealmEvent::Starting(ref realm)   => write!(f, "RealmStarting({})", realm.name()),
             RealmEvent::Started(ref realm)   => write!(f, "RealmStarted({})", realm.name()),
+            RealmEvent::Stopping(ref realm)   => write!(f, "RealmStopping({})", realm.name()),
             RealmEvent::Stopped(ref realm)   => write!(f, "RealmStopped({})", realm.name()),
             RealmEvent::New(ref realm)       => write!(f, "RealmNew({})", realm.name()),
             RealmEvent::Removed(ref realm)   => write!(f, "RealmRemoved({})", realm.name()),

libcitadel/src/realm/manager.rs

@@ -194,7 +194,13 @@ impl RealmManager {
             return Ok(());
         }
         info!("Starting realm {}", realm.name());
-        self._start_realm(realm, &mut HashSet::new())?;
+        self.inner().events.send_event(RealmEvent::Starting(realm.clone()));
+        if let Err(err) = self._start_realm(realm, &mut HashSet::new()) {
+            self.inner().events.send_event(RealmEvent::Stopped(realm.clone()));
+            return Err(err);
+        }
+
+        self.inner().events.send_event(RealmEvent::Started(realm.clone()));
 
         if !Realms::is_some_realm_current() {
             self.inner_mut().realms.set_realm_current(realm)
@@ -292,6 +298,7 @@ impl RealmManager {
         }
 
         info!("Stopping realm {}", realm.name());
+        self.inner().events.send_event(RealmEvent::Stopping(realm.clone()));
 
         if realm.config().flatpak() {
             if let Err(err) = self.stop_gnome_software_sandbox(realm) {
@@ -300,8 +307,12 @@ impl RealmManager {
         }
 
         realm.set_active(false);
-        self.systemd.stop_realm(realm)?;
+        if let Err(err) = self.systemd.stop_realm(realm) {
+            self.inner().events.send_event(RealmEvent::Stopped(realm.clone()));
+            return Err(err);
+        }
         realm.cleanup_rootfs();
+        self.inner().events.send_event(RealmEvent::Stopped(realm.clone()));
 
         if realm.is_current() {
             self.choose_some_current_realm();

libcitadel/src/realm/realm.rs

@@ -169,6 +169,20 @@ impl Realm {
         self.inner.write().unwrap()
     }
 
+
+    pub fn start(&self) -> Result<()> {
+        warn!("Realm({})::start()", self.name());
+        self.manager().start_realm(self)
+    }
+
+    pub fn stop(&self) -> Result<()> {
+        self.manager().stop_realm(self)
+    }
+
+    pub fn set_current(&self) -> Result<()> {
+        self.manager().set_current_realm(self)
+    }
+
     pub fn is_active(&self) -> bool {
         self.inner_mut().is_active()
     }

realm-config-ui/Cargo.toml

@@ -9,7 +9,7 @@ homepage = "https://subgraph.com"
 [dependencies]
 libcitadel = { path = "../libcitadel" }
 rand = "0.8"
-zvariant = "2.7.0"
+zvariant = "4.2.0"
 serde = { version = "1.0", features = ["derive"] }
-zbus = "=2.0.0-beta.5"
+zbus = "4.4.0"
 gtk = { version = "0.14.0", features = ["v3_24"] }

realm-config-ui/src/realmsd.rs

@@ -1,10 +1,10 @@
 use std::collections::HashMap;
 use std::rc::Rc;
 
-use zbus::dbus_proxy;
-use zvariant::derive::Type;
+use zvariant::Type;
 use serde::{Serialize,Deserialize};
-
+use zbus::proxy;
+use zbus::blocking::Connection;
 use crate::error::{Error, Result};
 
 #[derive(Deserialize,Serialize,Type)]
@@ -85,10 +85,12 @@ impl RealmConfig {
     }
 }
 
-#[dbus_proxy(
+#[proxy(
 default_service = "com.subgraph.realms",
 interface = "com.subgraph.realms.Manager",
-default_path = "/com/subgraph/realms"
+default_path = "/com/subgraph/realms",
+gen_blocking = true,
+gen_async = false,
 )]
 pub trait RealmsManager {
     fn get_current(&self) -> zbus::Result<String>;
@@ -102,7 +104,7 @@ pub trait RealmsManager {
 
 impl RealmsManagerProxy<'_> {
     pub fn connect() -> Result<Self> {
-        let connection = zbus::Connection::new_system()?;
+        let connection = Connection::system()?;
 
         let proxy = RealmsManagerProxy::new(&connection)
             .map_err(|_| Error::ManagerConnect)?;

realmsd/Cargo.toml

@@ -6,8 +6,11 @@ edition = "2018"
 
 [dependencies]
 libcitadel = { path = "../libcitadel" }
-zbus = "=2.0.0-beta.5"
-zvariant = "2.7.0"
+async-io = "2.3.2"
+blocking = "1.6.1"
+event-listener = "5.3.1"
+zbus = "4.4.0"
+zvariant = "4.2.0"
 serde = { version = "1.0", features = ["derive"] }
 serde_repr = "0.1.8"
 

realmsd/src/events.rs

@@ -1,15 +1,16 @@
-use zbus::{Connection, ObjectServer};
+use async_io::block_on;
+use zbus::blocking::Connection;
+use zbus::SignalContext;
 use crate::realms_manager::{RealmsManagerServer, REALMS_SERVER_OBJECT_PATH, realm_status};
 use libcitadel::{RealmEvent, Realm};
 
 pub struct EventHandler {
     connection: Connection,
-    realms_server: RealmsManagerServer,
 }
 
 impl EventHandler {
-    pub fn new(connection: Connection, realms_server: RealmsManagerServer) -> Self {
-        EventHandler { connection, realms_server }
+    pub fn new(connection: Connection) -> Self {
+        EventHandler { connection }
     }
 
     pub fn handle_event(&self, ev: &RealmEvent)  {
@@ -25,44 +26,49 @@ impl EventHandler {
             RealmEvent::New(realm) => self.on_new(realm),
             RealmEvent::Removed(realm) => self.on_removed(realm),
             RealmEvent::Current(realm) => self.on_current(realm.as_ref()),
+            RealmEvent::Starting(_) => Ok(()),
+            RealmEvent::Stopping(_) => Ok(()),
         }
     }
 
-    fn with_server<F>(&self, func: F) -> zbus::Result<()>
+    fn with_signal_context<F>(&self, func: F) -> zbus::Result<()>
         where
-            F: Fn(&RealmsManagerServer) -> zbus::Result<()>,
+            F: Fn(&SignalContext) -> zbus::Result<()>,
     {
-        let mut object_server = ObjectServer::new(&self.connection);
-        object_server.at(REALMS_SERVER_OBJECT_PATH, self.realms_server.clone())?;
-        object_server.with(REALMS_SERVER_OBJECT_PATH, |iface: &RealmsManagerServer| func(iface))
+        let object_server = self.connection.object_server();
+        let iface = object_server.interface::<_, RealmsManagerServer>(REALMS_SERVER_OBJECT_PATH)?;
+
+        let ctx = iface.signal_context();
+        func(ctx)
     }
 
     fn on_started(&self, realm: &Realm) -> zbus::Result<()> {
         let pid_ns = realm.pid_ns().unwrap_or(0);
         let status = realm_status(realm);
-        self.with_server(|server| server.realm_started(realm.name(), pid_ns, status))
+        self.with_signal_context(|ctx| block_on(RealmsManagerServer::realm_started(ctx, realm.name(), pid_ns, status)))
     }
 
     fn on_stopped(&self, realm: &Realm) -> zbus::Result<()> {
         let status = realm_status(realm);
-        self.with_server(|server| server.realm_stopped(realm.name(), status))
+        self.with_signal_context(|ctx| block_on(RealmsManagerServer::realm_stopped(ctx, realm.name(), status)))
     }
 
     fn on_new(&self, realm: &Realm) -> zbus::Result<()> {
         let status = realm_status(realm);
         let description = realm.notes().unwrap_or(String::new());
-        self.with_server(|server| server.realm_new(realm.name(), &description, status))
+        self.with_signal_context(|ctx| block_on(RealmsManagerServer::realm_new(ctx, realm.name(), &description, status)))
     }
 
     fn on_removed(&self, realm: &Realm) -> zbus::Result<()> {
-        self.with_server(|server| server.realm_removed(realm.name()))
+        self.with_signal_context(|ctx| block_on(RealmsManagerServer::realm_removed(ctx, realm.name())))
     }
 
     fn on_current(&self, realm: Option<&Realm>) -> zbus::Result<()> {
-        self.with_server(|server| {
+        self.with_signal_context(|ctx| {
             match realm {
-                Some(realm) => server.realm_current(realm.name(), realm_status(realm)),
-                None => server.realm_current("", 0),
+                Some(realm) => block_on(RealmsManagerServer::realm_current(ctx, realm.name(), realm_status(realm))),
+                None => block_on(RealmsManagerServer::realm_current(ctx, "", 0)),
+
             }
         })
     }

realmsd/src/main.rs

@@ -1,14 +1,18 @@
 #[macro_use] extern crate libcitadel;
 
-use zbus::{Connection, fdo};
-
-use libcitadel::{Logger, LogLevel, Result};
-
-use crate::realms_manager::RealmsManagerServer;
+use std::env;
+use std::sync::Arc;
+use event_listener::{Event, Listener};
+use zbus::blocking::Connection;
+use zbus::fdo::ObjectManager;
+use libcitadel::{Logger, LogLevel, Result, RealmManager};
+use crate::next::{RealmsManagerServer2, REALMS2_SERVER_OBJECT_PATH};
+use crate::realms_manager::{RealmsManagerServer, REALMS_SERVER_OBJECT_PATH};
 
 mod realms_manager;
 mod events;
 
+mod next;
 
 fn main() {
     if let Err(e) = run_realm_manager() {
@@ -16,24 +20,43 @@ fn main() {
     }
 }
 
-fn create_system_connection() -> zbus::Result<Connection> {
-    let connection = zbus::Connection::new_system()?;
-    fdo::DBusProxy::new(&connection)?.request_name("com.subgraph.realms", fdo::RequestNameFlags::AllowReplacement.into())?;
-    Ok(connection)
+fn register_realms_manager_server(connection: &Connection, realm_manager: &Arc<RealmManager>, quit_event: &Arc<Event>) -> Result<()> {
+    let server = RealmsManagerServer::load(&connection, realm_manager.clone(), quit_event.clone())
+        .map_err(context!("Loading realms server"))?;
+    connection.object_server().at(REALMS_SERVER_OBJECT_PATH, server).map_err(context!("registering realms manager object"))?;
+    Ok(())
+}
+
+fn register_realms2_manager_server(connection: &Connection, realm_manager: &Arc<RealmManager>, quit_event: &Arc<Event>) -> Result<()> {
+    let server2 = RealmsManagerServer2::load(&connection, realm_manager.clone(), quit_event.clone())
+        .map_err(context!("Loading realms2 server"))?;
+    connection.object_server().at(REALMS2_SERVER_OBJECT_PATH, server2).map_err(context!("registering realms manager object"))?;
+    connection.object_server().at(REALMS2_SERVER_OBJECT_PATH, ObjectManager).map_err(context!("registering ObjectManager"))?;
+    Ok(())
 }
 
 fn run_realm_manager() -> Result<()> {
     Logger::set_log_level(LogLevel::Verbose);
 
-    let connection = create_system_connection()
-        .map_err(context!("ZBus Connection error"))?;
+    let testing = env::args().skip(1).any(|s| s == "--testing");
 
-    let mut object_server = RealmsManagerServer::register(&connection)?;
+    let connection = Connection::system()
+           .map_err(context!("ZBus Connection error"))?;
 
-    loop {
-        if let Err(err) = object_server.try_handle_next() {
-            warn!("Error handling DBus message: {}", err);
-        }
-    }
 
+    let realm_manager = RealmManager::load()?;
+    let quit_event = Arc::new(Event::new());
+
+    if testing {
+        register_realms2_manager_server(&connection, &realm_manager, &quit_event)?;
+        connection.request_name("com.subgraph.Realms2")
+            .map_err(context!("acquiring realms manager name"))?;
+    } else {
+        register_realms_manager_server(&connection, &realm_manager, &quit_event)?;
+        register_realms2_manager_server(&connection, &realm_manager, &quit_event)?;
+        connection.request_name("com.subgraph.realms")
+            .map_err(context!("acquiring realms manager name"))?;
+    };
+    quit_event.listen().wait();
+    Ok(())
 }

realmsd/src/next/config.rs

@@ -0,0 +1,201 @@
+use std::collections::HashMap;
+use std::sync::Arc;
+use std::sync::atomic::{AtomicBool, Ordering};
+use serde::{Deserialize, Serialize};
+use zbus::fdo;
+use zvariant::Type;
+use libcitadel::{OverlayType, Realm, GLOBAL_CONFIG};
+use libcitadel::terminal::Base16Scheme;
+use crate::next::manager::failed;
+
+const BOOL_CONFIG_VARS: &[&str] = &[
+    "use-gpu", "use-wayland", "use-x11", "use-sound",
+    "use-shared-dir", "use-network", "use-kvm", "use-ephemeral-home",
+    "use-media-dir", "use-fuse", "use-flatpak", "use-gpu-card0"
+];
+
+fn is_bool_config_variable(variable: &str) -> bool {
+    BOOL_CONFIG_VARS.iter().any(|&s| s == variable)
+}
+
+#[derive(Deserialize,Serialize,Type)]
+pub struct RealmConfigVars {
+    items: HashMap<String,String>,
+}
+
+impl RealmConfigVars {
+    fn new() -> Self {
+        RealmConfigVars { items: HashMap::new() }
+    }
+
+    pub fn new_global() -> Self {
+        Self::new_from_config(&GLOBAL_CONFIG)
+    }
+
+    fn new_from_realm(realm: &Realm) -> Self {
+        let config = realm.config();
+        Self::new_from_config(&config)
+    }
+
+    fn new_from_config(config: &libcitadel::RealmConfig) -> Self {
+        let mut vars = RealmConfigVars::new();
+        vars.add_bool("use-gpu", config.gpu());
+        vars.add_bool("use-gpu-card0", config.gpu_card0());
+        vars.add_bool("use-wayland", config.wayland());
+        vars.add_bool("use-x11", config.x11());
+        vars.add_bool("use-sound", config.sound());
+        vars.add_bool("use-shared-dir", config.shared_dir());
+        vars.add_bool("use-network", config.network());
+        vars.add_bool("use-kvm", config.kvm());
+        vars.add_bool("use-ephemeral-home", config.ephemeral_home());
+        vars.add_bool("use-media-dir", config.media_dir());
+        vars.add_bool("use-fuse", config.fuse());
+        vars.add_bool("use-flatpak", config.flatpak());
+
+        let overlay = match config.overlay() {
+            OverlayType::None => "none",
+            OverlayType::TmpFS => "tmpfs",
+            OverlayType::Storage => "storage",
+        };
+        vars.add("overlay", overlay);
+
+        let scheme = match config.terminal_scheme() {
+            Some(name) => name.to_string(),
+            None => String::new(),
+        };
+        vars.add("terminal-scheme", scheme);
+        vars.add("realmfs", config.realmfs());
+        vars
+    }
+
+    fn add_bool(&mut self, name: &str, val: bool) {
+        let valstr = if val { "true".to_string() } else { "false".to_string() };
+        self.add(name, valstr);
+    }
+
+    fn add<S,T>(&mut self, k: S, v: T) where S: Into<String>, T: Into<String> {
+        self.items.insert(k.into(), v.into());
+    }
+}
+
+#[derive(Clone)]
+pub struct RealmConfig {
+    realm: Realm,
+    changed: Arc<AtomicBool>,
+}
+
+impl RealmConfig {
+    pub fn new(realm: Realm) -> Self {
+        let changed = Arc::new(AtomicBool::new(false));
+        RealmConfig { realm, changed }
+    }
+
+    fn mark_changed(&self) {
+        self.changed.store(true, Ordering::Relaxed);
+    }
+
+    fn is_changed(&self) -> bool {
+        self.changed.load(Ordering::Relaxed)
+    }
+
+    pub fn config_vars(&self) -> RealmConfigVars {
+        RealmConfigVars::new_from_realm(&self.realm)
+    }
+
+    fn set_bool_var(&mut self, var: &str, value: &str) -> fdo::Result<()> {
+        let v = match value {
+            "true" => true,
+            "false" => false,
+            _ => return failed(format!("Invalid boolean value '{}' for realm config variable '{}'", value, var)),
+        };
+
+        let mut has_changed = true;
+        self.realm.with_mut_config(|c| {
+            match var {
+                "use-gpu" if c.gpu() != v => c.use_gpu = Some(v),
+                _ => has_changed = false,
+            }
+        });
+        if has_changed {
+            self.mark_changed();
+        }
+        Ok(())
+    }
+
+    fn set_overlay(&mut self, value: &str) -> fdo::Result<()> {
+        let val = match value {
+            "tmpfs" => Some("tmpfs".to_string()),
+            "storage" => Some("storage".to_string()),
+            "none" => None,
+            _ => return failed(format!("Invalid value '{}' for overlay config", value)),
+        };
+        if self.realm.config().overlay != val {
+            self.realm.with_mut_config(|c| {
+                c.overlay = Some(value.to_string());
+            });
+            self.mark_changed();
+        }
+        Ok(())
+    }
+
+    fn set_terminal_scheme(&mut self, value: &str) -> fdo::Result<()> {
+        if Some(value) == self.realm.config().terminal_scheme() {
+            return Ok(())
+        }
+
+        let scheme = match Base16Scheme::by_name(value) {
+            Some(scheme) => scheme,
+            None => return failed(format!("Invalid terminal color scheme '{}'", value)),
+        };
+
+        let manager = self.realm.manager();
+        if let Err(err) = scheme.apply_to_realm(&manager, &self.realm) {
+            return failed(format!("Error applying terminal color scheme: {}", err));
+        }
+
+        self.realm.with_mut_config(|c| {
+            c.terminal_scheme = Some(value.to_string());
+        });
+        self.mark_changed();
+        Ok(())
+    }
+
+    fn set_realmfs(&mut self, value: &str) -> fdo::Result<()> {
+        let manager = self.realm.manager();
+        if manager.realmfs_by_name(value).is_none() {
+            return failed(format!("Failed to set 'realmfs' config for realm-{}: RealmFS named '{}' does not exist", self.realm.name(), value));
+        }
+        if self.realm.config().realmfs() != value {
+            self.realm.with_mut_config(|c| {
+                c.realmfs = Some(value.to_string())
+            });
+            self.mark_changed();
+        }
+        Ok(())
+    }
+
+    pub fn save_config(&self) -> fdo::Result<()> {
+        if self.is_changed() {
+            self.realm.config()
+                .write()
+                .map_err(|err| fdo::Error::Failed(format!("Error writing config file for realm-{}: {}", self.realm.name(), err)))?;
+
+            self.changed.store(false, Ordering::Relaxed);
+        }
+        Ok(())
+    }
+
+    pub fn set_var(&mut self, var: &str, value: &str) -> fdo::Result<()> {
+        if is_bool_config_variable(var) {
+            self.set_bool_var(var, value)
+        } else if var == "overlay" {
+            self.set_overlay(value)
+        } else if var == "terminal-scheme" {
+            self.set_terminal_scheme(value)
+        } else if var == "realmfs" {
+            self.set_realmfs(value)
+        } else {
+            failed(format!("Unknown realm configuration variable '{}'", var))
+        }
+    }
+}

realmsd/src/next/manager.rs

@@ -0,0 +1,103 @@
+use std::sync::Arc;
+use blocking::unblock;
+use event_listener::{Event, EventListener};
+use serde::Serialize;
+use serde_repr::Serialize_repr;
+use zbus::blocking::Connection;
+use zbus::{fdo, interface};
+use zvariant::Type;
+use libcitadel::{PidLookupResult, RealmManager};
+use crate::next::config::RealmConfigVars;
+use crate::next::realm::RealmItemState;
+use crate::next::realmfs::RealmFSState;
+
+pub fn failed<T>(message: String) -> fdo::Result<T> {
+    Err(fdo::Error::Failed(message))
+}
+
+#[derive(Serialize_repr, Type, Debug, PartialEq)]
+#[repr(u32)]
+pub enum PidLookupResultCode {
+    Unknown = 1,
+    Realm   = 2,
+    Citadel = 3,
+}
+
+#[derive(Debug, Type, Serialize)]
+pub struct RealmFromCitadelPid {
+    code: PidLookupResultCode,
+    realm: String,
+}
+
+impl From<PidLookupResult> for RealmFromCitadelPid {
+    fn from(result: PidLookupResult) -> Self {
+        match result {
+            PidLookupResult::Unknown => RealmFromCitadelPid { code: PidLookupResultCode::Unknown, realm: String::new() },
+            PidLookupResult::Realm(realm) => RealmFromCitadelPid { code: PidLookupResultCode::Realm, realm: realm.name().to_string() },
+            PidLookupResult::Citadel => RealmFromCitadelPid { code: PidLookupResultCode::Citadel, realm: String::new() },
+        }
+    }
+}
+
+pub struct RealmsManagerServer2 {
+    realms: RealmItemState,
+    realmfs_state: RealmFSState,
+    manager: Arc<RealmManager>,
+    quit_event: Arc<Event>,
+}
+
+
+impl RealmsManagerServer2 {
+
+    fn new(connection: Connection, manager: Arc<RealmManager>, quit_event: Arc<Event>) -> Self {
+        let realms = RealmItemState::new(connection.clone());
+        let realmfs_state = RealmFSState::new(connection.clone());
+        RealmsManagerServer2 {
+            realms,
+            realmfs_state,
+            manager,
+            quit_event,
+        }
+    }
+
+    pub fn load(connection: &Connection, manager: Arc<RealmManager>, quit_event: Arc<Event>) -> zbus::Result<Self> {
+        let mut server = Self::new(connection.clone(), manager.clone(), quit_event);
+        server.realms.load_realms(&manager)?;
+        server.realmfs_state.load(&manager)?;
+        server.realms.populate_realmfs(&server.realmfs_state)?;
+        Ok(server)
+    }
+
+}
+
+#[interface(name = "com.subgraph.realms.Manager2")]
+impl RealmsManagerServer2 {
+
+    async fn get_current(&self) -> u32 {
+
+        self.realms.get_current()
+            .map(|r| r.index())
+            .unwrap_or(0)
+    }
+
+    async fn realm_from_citadel_pid(&self, pid: u32) -> RealmFromCitadelPid {
+        let manager = self.manager.clone();
+        unblock(move || {
+            manager.realm_by_pid(pid).into()
+        }).await
+    }
+
+    async fn create_realm(&self, name: &str) -> fdo::Result<()> {
+        let manager = self.manager.clone();
+        let name = name.to_string();
+        unblock(move || {
+            let _ = manager.new_realm(&name).map_err(|err| fdo::Error::Failed(err.to_string()))?;
+            Ok(())
+        }).await
+    }
+
+    async fn get_global_config(&self) -> RealmConfigVars {
+        RealmConfigVars::new_global()
+    }
+
+}

realmsd/src/next/mod.rs

@@ -0,0 +1,8 @@
+
+mod manager;
+mod config;
+mod realm;
+mod realmfs;
+
+pub use manager::RealmsManagerServer2;
+pub const REALMS2_SERVER_OBJECT_PATH: &str = "/com/subgraph/Realms2";

realmsd/src/next/realm.rs

@@ -0,0 +1,374 @@
+use std::collections::HashMap;
+use std::convert::TryInto;
+use std::sync::{Arc, Mutex, MutexGuard};
+use std::sync::atomic::{AtomicBool, AtomicI64, AtomicU32, Ordering};
+use blocking::unblock;
+use zbus::{interface, fdo};
+use zbus::blocking::Connection;
+use zbus::names::{BusName, InterfaceName};
+use zvariant::{OwnedObjectPath, Value};
+use libcitadel::{Realm, RealmEvent, RealmManager, Result};
+use crate::next::config::{RealmConfig, RealmConfigVars};
+use crate::next::realmfs::RealmFSState;
+use crate::next::REALMS2_SERVER_OBJECT_PATH;
+
+#[derive(Clone)]
+pub struct RealmItem {
+    path: String,
+    index: u32,
+    realm: Realm,
+    config: RealmConfig,
+    in_run_transition: Arc<AtomicBool>,
+    realmfs_index: Arc<AtomicU32>,
+    last_timestamp: Arc<AtomicI64>,
+}
+
+#[derive(Copy,Clone)]
+#[repr(u32)]
+enum RealmRunStatus {
+    Stopped = 0,
+    Starting,
+    Running,
+    Current,
+    Stopping,
+}
+
+impl RealmRunStatus {
+    fn for_realm(realm: &Realm, in_transition: bool) -> Self {
+        if in_transition {
+            if realm.is_active() { Self::Stopping } else { Self::Starting }
+        } else if realm.is_active() {
+            if realm.is_current() { Self::Current } else {Self::Running }
+        } else {
+            Self::Stopped
+        }
+    }
+}
+
+impl RealmItem {
+    pub(crate) fn new_from_realm(index: u32, realm: Realm) -> RealmItem {
+        let path = format!("{}/Realm{}", REALMS2_SERVER_OBJECT_PATH, index);
+        let in_run_transition = Arc::new(AtomicBool::new(false));
+        let config = RealmConfig::new(realm.clone());
+        let realmfs_index = Arc::new(AtomicU32::new(0));
+        let last_timestamp = Arc::new(AtomicI64::new(realm.timestamp()));
+        RealmItem { path, index, realm, config, in_run_transition, realmfs_index, last_timestamp }
+    }
+
+    pub fn path(&self) -> &str {
+        &self.path
+    }
+
+    pub fn index(&self) -> u32 {
+        self.index
+    }
+
+    fn in_run_transition(&self) -> bool {
+        self.in_run_transition.load(Ordering::Relaxed)
+    }
+
+    fn get_run_status(&self) -> RealmRunStatus {
+        RealmRunStatus::for_realm(&self.realm, self.in_run_transition())
+    }
+
+    async fn do_start(&mut self) -> fdo::Result<()> {
+        if !self.realm.is_active() {
+            let realm = self.realm.clone();
+
+            let res = unblock(move || realm.start()).await;
+
+            if let Err(err) = res {
+                return Err(fdo::Error::Failed(format!("Failed to start realm: {}", err)));
+            }
+        }
+        Ok(())
+    }
+
+    async fn do_stop(&mut self) -> fdo::Result<()> {
+        if self.realm.is_active() {
+            let realm = self.realm.clone();
+
+            let res = unblock(move || realm.stop()).await;
+
+            if let Err(err) = res {
+                return Err(fdo::Error::Failed(format!("Failed to stop realm: {}", err)));
+            }
+        }
+        Ok(())
+    }
+}
+
+#[interface(
+    name = "com.subgraph.realms.Realm"
+)]
+impl RealmItem {
+
+    async fn start(
+        &mut self,
+    ) -> fdo::Result<()> {
+
+        self.do_start().await?;
+        Ok(())
+    }
+
+    async fn stop(
+        &mut self,
+    ) -> fdo::Result<()> {
+        self.do_stop().await?;
+        Ok(())
+    }
+
+    async fn restart(
+        &mut self,
+    ) -> fdo::Result<()> {
+        self.do_stop().await?;
+        self.do_start().await?;
+        Ok(())
+    }
+
+    async fn set_current(&mut self) -> fdo::Result<()> {
+        let realm = self.realm.clone();
+        let res = unblock(move || realm.set_current()).await;
+        if let Err(err) = res {
+            return Err(fdo::Error::Failed(format!("Failed to set realm {} as current: {}", self.realm.name(), err)));
+        }
+        Ok(())
+    }
+
+    async fn get_config(&self) -> RealmConfigVars {
+        self.config.config_vars()
+    }
+
+    async fn set_config(&mut self, vars: Vec<(String, String)>) -> fdo::Result<()> {
+        for (var, val) in &vars {
+            self.config.set_var(var, val)?;
+        }
+        let config = self.config.clone();
+        unblock(move || config.save_config()).await
+    }
+
+    #[zbus(property, name = "RunStatus")]
+    fn run_status(&self) -> u32 {
+        self.get_run_status() as u32
+    }
+
+    #[zbus(property, name="IsSystemRealm")]
+    fn is_system_realm(&self) -> bool {
+        self.realm.is_system()
+    }
+
+    #[zbus(property, name = "Name")]
+    fn name(&self) -> &str {
+        self.realm.name()
+    }
+
+    #[zbus(property, name = "Description")]
+    fn description(&self) -> String {
+        self.realm.notes()
+            .unwrap_or(String::new())
+    }
+
+    #[zbus(property, name = "PidNS")]
+    fn pid_ns(&self) -> u64 {
+        self.realm.pid_ns().unwrap_or_default()
+    }
+
+    #[zbus(property, name = "RealmFS")]
+    fn realmfs(&self) -> u32 {
+        self.realmfs_index.load(Ordering::Relaxed)
+    }
+
+    #[zbus(property, name = "Timestamp")]
+    fn timestamp(&self) -> u64 {
+        self.realm.timestamp() as u64
+    }
+}
+
+
+#[derive(Clone)]
+pub struct RealmItemState(Arc<Mutex<Inner>>);
+
+struct Inner {
+    connection: Connection,
+    next_index: u32,
+    realms: HashMap<String, RealmItem>,
+    current_realm: Option<RealmItem>,
+}
+
+impl Inner {
+    fn new(connection: Connection) -> Self {
+        Inner {
+            connection,
+            next_index: 1,
+            realms:HashMap::new(),
+            current_realm: None,
+        }
+    }
+
+    fn load_realms(&mut self, manager: &RealmManager) -> zbus::Result<()> {
+        for realm in manager.realm_list() {
+            self.add_realm(realm)?;
+        }
+        Ok(())
+    }
+    pub fn populate_realmfs(&mut self, realmfs_state: &RealmFSState) -> zbus::Result<()> {
+        for item in self.realms.values_mut() {
+            if let Some(realmfs) = realmfs_state.realmfs_by_name(item.realm.config().realmfs()) {
+                item.realmfs_index.store(realmfs.index(), Ordering::Relaxed);
+            }
+        }
+        Ok(())
+    }
+
+   fn add_realm(&mut self, realm: Realm) -> zbus::Result<()> {
+        if self.realms.contains_key(realm.name()) {
+            warn!("Attempted to add duplicate realm '{}'", realm.name());
+            return Ok(())
+        }
+
+        let key = realm.name().to_string();
+        let item = RealmItem::new_from_realm(self.next_index, realm);
+        self.connection.object_server().at(item.path(), item.clone())?;
+        self.realms.insert(key, item);
+        self.next_index += 1;
+        Ok(())
+    }
+
+    fn remove_realm(&mut self, realm: &Realm) -> zbus::Result<()> {
+        if let Some(item) = self.realms.remove(realm.name()) {
+            self.connection.object_server().remove::<RealmItem, &str>(item.path())?;
+        } else {
+            warn!("Failed to find realm to remove with name '{}'", realm.name());
+        }
+        Ok(())
+    }
+
+    fn emit_property_changed(&self, object_path: OwnedObjectPath, propname: &str, value: Value<'_>) -> zbus::Result<()> {
+        let iface_name = InterfaceName::from_str_unchecked("com.subgraph.realms.Realm");
+        let changed = HashMap::from([(propname.to_string(), value)]);
+        let inval: &[&str] = &[];
+        self.connection.emit_signal(
+            None::<BusName<'_>>,
+            &object_path,
+            "org.freedesktop.Dbus.Properties",
+            "PropertiesChanged",
+            &(iface_name, changed, inval))?;
+        Ok(())
+    }
+    fn realm_status_changed(&self, realm: &Realm, transition: Option<bool>) -> zbus::Result<()> {
+        if let Some(realm) = self.realm_by_name(realm.name()) {
+            if let Some(transition) = transition {
+                realm.in_run_transition.store(transition, Ordering::Relaxed);
+            }
+            let object_path = realm.path().try_into().unwrap();
+            self.emit_property_changed(object_path, "RunStatus", Value::U32(realm.get_run_status() as u32))?;
+            let timestamp = realm.realm.timestamp();
+            if realm.last_timestamp.load(Ordering::Relaxed) != realm.realm.timestamp() {
+                realm.last_timestamp.store(timestamp, Ordering::Relaxed);
+                let object_path = realm.path().try_into().unwrap();
+                self.emit_property_changed(object_path, "Timestamp", Value::U64(timestamp as u64))?;
+            }
+        }
+        Ok(())
+    }
+
+    fn realm_by_name(&self, name: &str) -> Option<&RealmItem> {
+        let res = self.realms.get(name);
+
+        if res.is_none() {
+            warn!("Failed to find realm with name '{}'", name);
+        }
+        res
+    }
+
+    fn on_starting(&self, realm: &Realm) -> zbus::Result<()>{
+        self.realm_status_changed(realm, Some(true))?;
+        Ok(())
+    }
+
+    fn on_started(&self, realm: &Realm) -> zbus::Result<()>{
+        self.realm_status_changed(realm, Some(false))
+    }
+
+    fn on_stopping(&self, realm: &Realm) -> zbus::Result<()> {
+        self.realm_status_changed(realm, Some(true))
+    }
+
+    fn on_stopped(&self, realm: &Realm) -> zbus::Result<()> {
+        self.realm_status_changed(realm, Some(false))
+    }
+
+    fn on_new(&mut self, realm: &Realm) -> zbus::Result<()> {
+        self.add_realm(realm.clone())?;
+        Ok(())
+    }
+
+    fn on_removed(&mut self, realm: &Realm) -> zbus::Result<()> {
+        self.remove_realm(&realm)?;
+        Ok(())
+    }
+
+    fn on_current(&mut self, realm: Option<&Realm>) -> zbus::Result<()> {
+
+        if let Some(r) = self.current_realm.take() {
+            self.realm_status_changed(&r.realm, None)?;
+        }
+
+        if let Some(realm) = realm {
+            self.realm_status_changed(realm, None)?;
+            if let Some(item) = self.realm_by_name(realm.name()) {
+                self.current_realm = Some(item.clone());
+            }
+        }
+        Ok(())
+    }
+}
+
+impl RealmItemState {
+    pub fn new(connection: Connection) -> Self {
+        RealmItemState(Arc::new(Mutex::new(Inner::new(connection))))
+    }
+
+    pub fn load_realms(&self, manager: &RealmManager) -> zbus::Result<()> {
+        self.inner().load_realms(manager)?;
+        self.add_event_handler(manager)
+            .map_err(|err| zbus::Error::Failure(err.to_string()))?;
+        Ok(())
+    }
+
+    pub fn populate_realmfs(&self, realmfs_state: &RealmFSState) -> zbus::Result<()> {
+        self.inner().populate_realmfs(realmfs_state)
+    }
+
+    pub fn get_current(&self) -> Option<RealmItem>  {
+        self.inner().current_realm.clone()
+    }
+
+    fn inner(&self) -> MutexGuard<Inner> {
+        self.0.lock().unwrap()
+    }
+
+    fn add_event_handler(&self, manager: &RealmManager) -> Result<()> {
+        let state = self.clone();
+        manager.add_event_handler(move |ev| {
+            if let Err(err) = state.handle_event(ev) {
+                warn!("Error handling {}: {}", ev, err);
+            }
+        });
+        manager.start_event_task()?;
+        Ok(())
+    }
+
+    fn handle_event(&self, ev: &RealmEvent) -> zbus::Result<()> {
+        match ev {
+            RealmEvent::Started(realm) => self.inner().on_started(realm)?,
+            RealmEvent::Stopped(realm) => self.inner().on_stopped(realm)?,
+            RealmEvent::New(realm) => self.inner().on_new(realm)?,
+            RealmEvent::Removed(realm) => self.inner().on_removed(realm)?,
+            RealmEvent::Current(realm) => self.inner().on_current(realm.as_ref())?,
+            RealmEvent::Starting(realm) => self.inner().on_starting(realm)?,
+            RealmEvent::Stopping(realm) => self.inner().on_stopping(realm)?,
+        };
+        Ok(())
+    }
+}

realmsd/src/next/realmfs.rs

@@ -0,0 +1,120 @@
+use std::collections::HashMap;
+use std::convert::TryInto;
+use zbus::blocking::Connection;
+use zbus::{fdo, interface};
+use zvariant::{ObjectPath, OwnedObjectPath};
+use libcitadel::{RealmFS, RealmManager};
+use crate::next::REALMS2_SERVER_OBJECT_PATH;
+
+const BLOCK_SIZE: u64 = 4096;
+#[derive(Clone)]
+pub struct RealmFSItem {
+    object_path: OwnedObjectPath,
+    index: u32,
+    realmfs: RealmFS,
+}
+impl RealmFSItem {
+    pub(crate) fn new_from_realmfs(index: u32, realmfs: RealmFS) -> RealmFSItem {
+        let object_path = format!("{}/RealmFS{}", REALMS2_SERVER_OBJECT_PATH, index).try_into().unwrap();
+        RealmFSItem {
+            object_path,
+            index,
+            realmfs,
+        }
+    }
+
+    pub fn index(&self) -> u32 {
+        self.index
+    }
+
+    pub fn object_path(&self) -> ObjectPath {
+        self.object_path.as_ref()
+    }
+}
+
+#[interface(
+    name = "com.subgraph.realms.RealmFS"
+)]
+impl RealmFSItem {
+
+    #[zbus(property, name = "Name")]
+    fn name(&self) -> &str {
+        self.realmfs.name()
+    }
+
+    #[zbus(property, name = "Activated")]
+    fn activated(&self) -> bool {
+        self.realmfs.is_activated()
+    }
+
+    #[zbus(property, name = "InUse")]
+    fn in_use(&self) -> bool {
+        self.realmfs.is_activated()
+    }
+    #[zbus(property, name = "Mountpoint")]
+    fn mountpoint(&self) -> String {
+        self.realmfs.mountpoint().to_string()
+    }
+
+    #[zbus(property, name = "Path")]
+    fn path(&self) -> String {
+        format!("{}", self.realmfs.path().display())
+    }
+
+    #[zbus(property, name = "FreeSpace")]
+    fn free_space(&self) -> fdo::Result<u64> {
+        let blocks = self.realmfs.free_size_blocks()
+            .map_err(|err| fdo::Error::Failed(err.to_string()))?;
+        Ok(blocks as u64 * BLOCK_SIZE)
+    }
+
+    #[zbus(property, name = "AllocatedSpace")]
+    fn allocated_space(&self) -> fdo::Result<u64> {
+        let blocks = self.realmfs.allocated_size_blocks()
+            .map_err(|err| fdo::Error::Failed(err.to_string()))?;
+        Ok(blocks as u64 * BLOCK_SIZE)
+    }
+}
+
+pub struct RealmFSState {
+    connection: Connection,
+    next_index: u32,
+    items: HashMap<String, RealmFSItem>,
+}
+
+impl RealmFSState {
+    pub fn new(connection: Connection) -> Self {
+        RealmFSState {
+            connection,
+            next_index: 1,
+            items: HashMap::new(),
+        }
+    }
+
+    pub fn load(&mut self, manager: &RealmManager) -> zbus::Result<()> {
+        for realmfs in manager.realmfs_list() {
+            self.add_realmfs(realmfs)?;
+        }
+        Ok(())
+    }
+
+    fn add_realmfs(&mut self, realmfs: RealmFS) -> zbus::Result<()> {
+        if !self.items.contains_key(realmfs.name()) {
+            let name = realmfs.name().to_string();
+            let item = RealmFSItem::new_from_realmfs(self.next_index, realmfs);
+            self.connection.object_server().at(item.object_path(), item.clone())?;
+            self.items.insert(name, item);
+            self.next_index += 1;
+        } else {
+            warn!("Attempted to add duplicate realmfs '{}'", realmfs.name());
+        }
+        Ok(())
+    }
+    pub fn realmfs_by_name(&self, name: &str) -> Option<&RealmFSItem> {
+        let res = self.items.get(name);
+        if res.is_none() {
+            warn!("Failed to find RealmFS with name '{}'", name);
+        }
+        res
+    }
+}

realmsd/src/realms_manager.rs

@@ -1,11 +1,14 @@
 use libcitadel::{RealmManager, Realm, OverlayType, Result, PidLookupResult};
 use std::sync::Arc;
-use zbus::{dbus_interface, ObjectServer,Connection};
-use zvariant::derive::Type;
+use zbus::blocking::Connection;
+use zvariant::Type;
 use std::thread;
 use std::collections::HashMap;
-use serde::{Serialize,Deserialize};
+use blocking::unblock;
+use event_listener::{Event, EventListener};
+use serde::{Serialize, Deserialize};
 use serde_repr::Serialize_repr;
+use zbus::{interface, SignalContext};
 use crate::events::EventHandler;
 use libcitadel::terminal::Base16Scheme;
 
@@ -39,6 +42,7 @@ impl From<PidLookupResult> for RealmFromCitadelPid {
 #[derive(Clone)]
 pub struct RealmsManagerServer {
     manager: Arc<RealmManager>,
+    quit_event: Arc<Event>,
 }
 
 const BOOL_CONFIG_VARS: &[&str] = &[
@@ -121,40 +125,40 @@ fn configure_realm(manager: &RealmManager, realm: &Realm, variable: &str, value:
 
 impl RealmsManagerServer {
 
-    fn register_events(&self, connection: &Connection) -> Result<()> {
-        let events = EventHandler::new(connection.clone(), self.clone());
-        self.manager.add_event_handler(move |ev| events.handle_event(ev));
-        self.manager.start_event_task()
+    pub fn load(connection: &Connection, manager: Arc<RealmManager>, quit_event: Arc<Event>) -> Result<RealmsManagerServer> {
+        let server = RealmsManagerServer { manager, quit_event };
+        let events = EventHandler::new(connection.clone());
+        server.manager.add_event_handler(move |ev| events.handle_event(ev));
+        server.manager.start_event_task()?;
+        Ok(server)
     }
-
-    pub fn register(connection: &Connection) -> Result<ObjectServer> {
-        let manager = RealmManager::load()?;
-        let iface = RealmsManagerServer { manager };
-        iface.register_events(connection)?;
-        let mut object_server = ObjectServer::new(connection);
-        object_server.at(REALMS_SERVER_OBJECT_PATH, iface).map_err(context!("ZBus error"))?;
-        Ok(object_server)
-    }
-
 }
 
 
-#[dbus_interface(name = "com.subgraph.realms.Manager")]
+#[interface(name = "com.subgraph.realms.Manager")]
 impl RealmsManagerServer {
 
-    fn set_current(&self, name: &str) {
-        if let Some(realm) = self.manager.realm_by_name(name) {
-            if let Err(err) = self.manager.set_current_realm(&realm) {
-                warn!("set_current_realm({}) failed: {}", name, err);
+    async fn set_current(&self, name: &str) {
+
+        let manager = self.manager.clone();
+        let name = name.to_string();
+        unblock(move || {
+            if let Some(realm) = manager.realm_by_name(&name) {
+                if let Err(err) = manager.set_current_realm(&realm) {
+                    warn!("set_current_realm({}) failed: {}", name, err);
+                }
             }
-        }
+        }).await
     }
 
-    fn get_current(&self) -> String {
-        match self.manager.current_realm() {
-            Some(realm) => realm.name().to_string(),
-            None => String::new(),
-        }
+    async fn get_current(&self) -> String {
+        let manager = self.manager.clone();
+        unblock(move || {
+            match manager.current_realm() {
+                Some(realm) => realm.name().to_string(),
+                None => String::new(),
+            }
+        }).await
     }
 
     fn list(&self) -> Vec<RealmItem> {
@@ -249,8 +253,12 @@ impl RealmsManagerServer {
         });
     }
 
-    fn realm_from_citadel_pid(&self, pid: u32) -> RealmFromCitadelPid {
-        self.manager.realm_by_pid(pid).into()
+    async fn realm_from_citadel_pid(&self, pid: u32) -> RealmFromCitadelPid {
+        let manager = self.manager.clone();
+        unblock(move || {
+            manager.realm_by_pid(pid).into()
+
+        }).await
     }
 
     fn realm_config(&self, name: &str) -> RealmConfig {
@@ -261,7 +269,7 @@ impl RealmsManagerServer {
         RealmConfig::new_from_realm(&realm)
     }
 
-    fn realm_set_config(&self, name: &str, vars: Vec<(String,String)>) {
+    async fn realm_set_config(&self, name: &str, vars: Vec<(String,String)>) {
         let realm = match self.manager.realm_by_name(name) {
             Some(r) => r,
             None => {
@@ -270,8 +278,12 @@ impl RealmsManagerServer {
             },
         };
 
-        for var in &vars {
-            configure_realm(&self.manager, &realm, &var.0, &var.1);
+        for var in vars {
+            let manager = self.manager.clone();
+            let realm = realm.clone();
+            unblock( move || {
+                configure_realm(&manager, &realm, &var.0, &var.1);
+            }).await;
         }
     }
 
@@ -279,13 +291,18 @@ impl RealmsManagerServer {
         Realm::is_valid_name(name) && self.manager.realm_by_name(name).is_some()
     }
 
-    fn create_realm(&self, name: &str) -> bool {
-        if let Err(err) = self.manager.new_realm(name) {
-            warn!("Error creating realm ({}): {}", name, err);
-            false
-        } else {
-            true
-        }
+    async fn create_realm(&self, name: &str) -> bool {
+
+        let manager = self.manager.clone();
+        let name = name.to_string();
+        unblock(move || {
+            if let Err(err) = manager.new_realm(&name) {
+                warn!("Error creating realm ({}): {}", name, err);
+                false
+            } else {
+                true
+            }
+        }).await
     }
 
     fn list_realm_f_s(&self) -> Vec<String> {
@@ -299,23 +316,23 @@ impl RealmsManagerServer {
 
     }
 
-    #[dbus_interface(signal)]
-    pub fn realm_started(&self, realm: &str, pid_ns: u64, status: u8) -> zbus::Result<()> { Ok(()) }
+    #[zbus(signal)]
+    pub async fn realm_started(ctx: &SignalContext<'_>, realm: &str, pid_ns: u64, status: u8) -> zbus::Result<()>;
 
-    #[dbus_interface(signal)]
-    pub fn realm_stopped(&self, realm: &str, status: u8) -> zbus::Result<()> { Ok(()) }
+    #[zbus(signal)]
+    pub async fn realm_stopped(ctx: &SignalContext<'_>, realm: &str, status: u8) -> zbus::Result<()>;
 
-    #[dbus_interface(signal)]
-    pub fn realm_new(&self, realm: &str, description: &str, status: u8) -> zbus::Result<()> { Ok(()) }
+    #[zbus(signal)]
+    pub async fn realm_new(ctx: &SignalContext<'_>, realm: &str, description: &str, status: u8) -> zbus::Result<()>;
 
-    #[dbus_interface(signal)]
-    pub fn realm_removed(&self, realm: &str) -> zbus::Result<()> { Ok(()) }
+    #[zbus(signal)]
+    pub async fn realm_removed(ctx: &SignalContext<'_>, realm: &str) -> zbus::Result<()>;
 
-    #[dbus_interface(signal)]
-    pub fn realm_current(&self, realm: &str, status: u8) -> zbus::Result<()> { Ok(()) }
+    #[zbus(signal)]
+    pub async fn realm_current(ctx: &SignalContext<'_>, realm: &str, status: u8) -> zbus::Result<()>;
 
-    #[dbus_interface(signal)]
-    pub fn service_started(&self) -> zbus::Result<()> { Ok(()) }
+    #[zbus(signal)]
+    pub async fn service_started(ctx: &SignalContext<'_>) -> zbus::Result<()>;
 
 }