2 files changed, 49 insertions, 3 deletions

diff --git a/src/util/background/mod.rs b/src/util/background/mod.rs
index c06e2225..92090a1a 100644
--- a/src/util/background/mod.rs
+++ b/src/util/background/mod.rs
@@ -4,9 +4,12 @@ pub mod job_worker;
 pub mod worker;
 
 use core::future::Future;
+
+use std::collections::HashMap;
 use std::pin::Pin;
 use std::sync::Arc;
 
+use serde::{Deserialize, Serialize};
 use tokio::sync::{mpsc, watch, Mutex};
 
 use crate::error::Error;
@@ -20,6 +23,14 @@ pub(crate) type Job = Pin<Box<dyn Future<Output = JobOutput> + Send>>;
 pub struct BackgroundRunner {
 	send_job: mpsc::UnboundedSender<(Job, bool)>,
 	send_worker: mpsc::UnboundedSender<Box<dyn Worker>>,
+	worker_info: Arc<std::sync::Mutex<HashMap<usize, WorkerInfo>>>,
+}
+
+#[derive(Clone, Serialize, Deserialize, Debug)]
+pub struct WorkerInfo {
+	pub name: String,
+	pub info: Option<String>,
+	pub status: WorkerStatus,
 }
 
 impl BackgroundRunner {
@@ -30,8 +41,13 @@ impl BackgroundRunner {
 	) -> (Arc<Self>, tokio::task::JoinHandle<()>) {
 		let (send_worker, worker_out) = mpsc::unbounded_channel::<Box<dyn Worker>>();
 
-		let await_all_done =
-			tokio::spawn(async move { WorkerProcessor::new(worker_out, stop_signal).run().await });
+		let worker_info = Arc::new(std::sync::Mutex::new(HashMap::new()));
+		let mut worker_processor =
+			WorkerProcessor::new(worker_out, stop_signal, worker_info.clone());
+
+		let await_all_done = tokio::spawn(async move {
+			worker_processor.run().await;
+		});
 
 		let (send_job, queue_out) = mpsc::unbounded_channel();
 		let queue_out = Arc::new(Mutex::new(queue_out));
@@ -52,10 +68,15 @@ impl BackgroundRunner {
 		let bgrunner = Arc::new(Self {
 			send_job,
 			send_worker,
+			worker_info,
 		});
 		(bgrunner, await_all_done)
 	}
 
+	pub fn get_worker_info(&self) -> HashMap<usize, WorkerInfo> {
+		self.worker_info.lock().unwrap().clone()
+	}
+
 	/// Spawn a task to be run in background
 	pub fn spawn<T>(&self, job: T)
 	where
diff --git a/src/util/background/worker.rs b/src/util/background/worker.rs
index f916692d..1d4eb3ea 100644
--- a/src/util/background/worker.rs
+++ b/src/util/background/worker.rs
@@ -1,16 +1,20 @@
+use std::collections::HashMap;
+use std::sync::Arc;
 use std::time::{Duration, Instant};
 
 use async_trait::async_trait;
 use futures::future::*;
 use futures::stream::FuturesUnordered;
 use futures::StreamExt;
+use serde::{Deserialize, Serialize};
 use tokio::select;
 use tokio::sync::{mpsc, watch};
 use tracing::*;
 
+use crate::background::WorkerInfo;
 use crate::error::Error;
 
-#[derive(PartialEq, Copy, Clone, Debug)]
+#[derive(PartialEq, Copy, Clone, Debug, Serialize, Deserialize)]
 pub enum WorkerStatus {
 	Busy,
 	Idle,
@@ -21,6 +25,10 @@ pub enum WorkerStatus {
 pub trait Worker: Send {
 	fn name(&self) -> String;
 
+	fn info(&self) -> Option<String> {
+		None
+	}
+
 	/// Work: do a basic unit of work, if one is available (otherwise, should return
 	/// WorkerStatus::Idle immediately).  We will do our best to not interrupt this future in the
 	/// middle of processing, it will only be interrupted at the last minute when Garage is trying
@@ -39,16 +47,19 @@ pub trait Worker: Send {
 pub(crate) struct WorkerProcessor {
 	stop_signal: watch::Receiver<bool>,
 	worker_chan: mpsc::UnboundedReceiver<Box<dyn Worker>>,
+	worker_info: Arc<std::sync::Mutex<HashMap<usize, WorkerInfo>>>,
 }
 
 impl WorkerProcessor {
 	pub(crate) fn new(
 		worker_chan: mpsc::UnboundedReceiver<Box<dyn Worker>>,
 		stop_signal: watch::Receiver<bool>,
+		worker_info: Arc<std::sync::Mutex<HashMap<usize, WorkerInfo>>>,
 	) -> Self {
 		Self {
 			stop_signal,
 			worker_chan,
+			worker_info,
 		}
 	}
 
@@ -87,6 +98,20 @@ impl WorkerProcessor {
 				worker = await_next_worker => {
 					if let Some(mut worker) = worker {
 						trace!("{} (TID {}): {:?}", worker.worker.name(), worker.task_id, worker.status);
+						let mut wi = self.worker_info.lock().unwrap();
+						match wi.get_mut(&worker.task_id) {
+							Some(i) => {
+								i.status = worker.status;
+								i.info = worker.worker.info();
+							}
+							None => {
+								wi.insert(worker.task_id, WorkerInfo {
+									name: worker.worker.name(),
+									status: worker.status,
+									info: worker.worker.info(),
+								});
+							}
+						}
 						// TODO save new worker status somewhere
 						if worker.status == WorkerStatus::Done {
 							info!("Worker {} (TID {}) exited", worker.worker.name(), worker.task_id);