From da8b224e241edad8cfe25f0b0256ebb0d60fa8dd Mon Sep 17 00:00:00 2001
From: Alex Auvolat <alex@adnab.me>
Date: Wed, 30 Aug 2023 14:38:19 +0200
Subject: lifecycle worker: skip entire bucket when no lifecycle config is set

---
 src/model/s3/lifecycle_worker.rs | 28 ++++++++++++++++++++++------
 1 file changed, 22 insertions(+), 6 deletions(-)

diff --git a/src/model/s3/lifecycle_worker.rs b/src/model/s3/lifecycle_worker.rs
index 069f44a0..1981e0fd 100644
--- a/src/model/s3/lifecycle_worker.rs
+++ b/src/model/s3/lifecycle_worker.rs
@@ -54,6 +54,12 @@ enum State {
 	},
 }
 
+#[derive(Clone, Copy, Eq, PartialEq)]
+enum Skip {
+	SkipBucket,
+	NextObject,
+}
+
 pub fn register_bg_vars(
 	persister: &PersisterShared<LifecycleWorkerPersisted>,
 	vars: &mut vars::BgVars,
@@ -164,10 +170,10 @@ impl Worker for LifecycleWorker {
 				};
 
 				let object = self.garage.object_table.data.decode_entry(&object_bytes)?;
-				process_object(
+				let skip = process_object(
 					&self.garage,
 					*date,
-					object,
+					&object,
 					objects_expired,
 					mpu_aborted,
 					last_bucket,
@@ -175,7 +181,13 @@ impl Worker for LifecycleWorker {
 				.await?;
 
 				*counter += 1;
-				*pos = next_pos;
+				if skip == Skip::SkipBucket {
+					let bucket_id_len = object.bucket_id.as_slice().len();
+					assert_eq!(pos.get(..bucket_id_len), Some(object.bucket_id.as_slice()));
+					*pos = [&pos[..bucket_id_len], &[0xFFu8][..]].concat();
+				} else {
+					*pos = next_pos;
+				}
 
 				Ok(WorkerState::Busy)
 			}
@@ -211,11 +223,11 @@ impl Worker for LifecycleWorker {
 async fn process_object(
 	garage: &Arc<Garage>,
 	now_date: NaiveDate,
-	object: Object,
+	object: &Object,
 	objects_expired: &mut usize,
 	mpu_aborted: &mut usize,
 	last_bucket: &mut Option<Bucket>,
-) -> Result<(), Error> {
+) -> Result<Skip, Error> {
 	let bucket = match last_bucket.take() {
 		Some(b) if b.id == object.bucket_id => b,
 		_ => garage
@@ -231,6 +243,10 @@ async fn process_object(
 		.and_then(|s| s.lifecycle_config.get().as_deref())
 		.unwrap_or_default();
 
+	if lifecycle_policy.is_empty() {
+		return Ok(Skip::SkipBucket);
+	}
+
 	for rule in lifecycle_policy.iter() {
 		if let Some(pfx) = &rule.filter.prefix {
 			if !object.key.starts_with(pfx) {
@@ -304,7 +320,7 @@ async fn process_object(
 	}
 
 	*last_bucket = Some(bucket);
-	Ok(())
+	Ok(Skip::NextObject)
 }
 
 fn check_size_filter(version_data: &ObjectVersionData, filter: &LifecycleFilter) -> bool {
-- 
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