From 3d477906d4ff418de10973db7bd3e940f2e47b2d Mon Sep 17 00:00:00 2001
From: Alex Auvolat <alex@adnab.me>
Date: Fri, 9 Jun 2023 17:13:27 +0200
Subject: properly delete multipart uploads after completion

---
 src/model/s3/object_table.rs | 54 ++++++++++++++++++++++++++++----------------
 1 file changed, 34 insertions(+), 20 deletions(-)

diff --git a/src/model/s3/object_table.rs b/src/model/s3/object_table.rs
index a69069b2..db5ccf96 100644
--- a/src/model/s3/object_table.rs
+++ b/src/model/s3/object_table.rs
@@ -397,34 +397,20 @@ impl TableSchema for ObjectTable {
 
 		// 2. Enqueue propagation deletions to version table
 		if let (Some(old_v), Some(new_v)) = (old, new) {
-			// Propagate deletion of old versions
 			for v in old_v.versions.iter() {
-				let newly_deleted = match new_v
+				let new_v_id = new_v
 					.versions
-					.binary_search_by(|nv| nv.cmp_key().cmp(&v.cmp_key()))
-				{
+					.binary_search_by(|nv| nv.cmp_key().cmp(&v.cmp_key()));
+
+				// Propagate deletion of old versions to the Version table
+				let delete_version = match new_v_id {
 					Err(_) => true,
 					Ok(i) => {
 						new_v.versions[i].state == ObjectVersionState::Aborted
 							&& v.state != ObjectVersionState::Aborted
 					}
 				};
-				if newly_deleted {
-					if let ObjectVersionState::Uploading {
-						multipart: true, ..
-					} = &v.state
-					{
-						let deleted_mpu =
-							MultipartUpload::new(v.uuid, old_v.bucket_id, old_v.key.clone(), true);
-						let res = self.mpu_table.queue_insert(tx, &deleted_mpu);
-						if let Err(e) = db::unabort(res)? {
-							error!(
-								"Unable to enqueue multipart upload deletion propagation: {}. A repair will be needed.",
-								e
-							);
-						}
-					}
-
+				if delete_version {
 					let deleted_version = Version::new(
 						v.uuid,
 						VersionBacklink::Object {
@@ -441,6 +427,34 @@ impl TableSchema for ObjectTable {
 						);
 					}
 				}
+
+				// After abortion or completion of multipart uploads, delete MPU table entry
+				if matches!(
+					v.state,
+					ObjectVersionState::Uploading {
+						multipart: true,
+						..
+					}
+				) {
+					let delete_mpu = match new_v_id {
+						Err(_) => true,
+						Ok(i) => !matches!(
+							new_v.versions[i].state,
+							ObjectVersionState::Uploading { .. }
+						),
+					};
+					if delete_mpu {
+						let deleted_mpu =
+							MultipartUpload::new(v.uuid, old_v.bucket_id, old_v.key.clone(), true);
+						let res = self.mpu_table.queue_insert(tx, &deleted_mpu);
+						if let Err(e) = db::unabort(res)? {
+							error!(
+								"Unable to enqueue multipart upload deletion propagation: {}. A repair will be needed.",
+								e
+							);
+						}
+					}
+				}
 			}
 		}
 
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