Prepare for multipart uploads

TODO

@@ -8,8 +8,10 @@ We will have to introduce lots of dummy data and then add/remove nodes many time
 Attaining S3 compatibility
 --------------------------
 
-- api_server following the S3 semantics for head/get/put/list/delete: verify more that it works as intended
 - multipart uploads
+- fix sync not working in some cases ? (when starting from empty?)
+
+- api_server following the S3 semantics for head/get/put/list/delete: verify more that it works as intended
 - PUT requests: verify content-md5 if provided
 - possibly other necessary endpoints ?
 

src/api/api_server.rs

@@ -134,10 +134,9 @@ async fn handler_inner(
 					.body(empty_body)
 					.unwrap();
 				Ok(response)
-			},
+			}
 			&Method::DELETE => Err(Error::Forbidden(
-				"Cannot delete buckets using S3 api, please talk to Garage directly"
-					.into(),
+				"Cannot delete buckets using S3 api, please talk to Garage directly".into(),
 			)),
 			&Method::GET => {
 				let mut params = HashMap::new();

src/api/s3_get.rs

@@ -43,7 +43,7 @@ pub async fn handle_head(
 		.versions()
 		.iter()
 		.rev()
-		.filter(|v| v.is_complete && v.data != ObjectVersionData::DeleteMarker)
+		.filter(|v| v.is_data())
 		.next()
 	{
 		Some(v) => v,
@@ -76,7 +76,7 @@ pub async fn handle_get(
 		.versions()
 		.iter()
 		.rev()
-		.filter(|v| v.is_complete)
+		.filter(|v| v.is_complete())
 		.next()
 	{
 		Some(v) => v,

src/api/s3_list.rs

@@ -8,7 +8,6 @@ use hyper::Response;
 use garage_util::error::Error;
 
 use garage_core::garage::Garage;
-use garage_core::object_table::*;
 
 use crate::api_server::BodyType;
 use crate::http_util::*;
@@ -44,11 +43,7 @@ pub async fn handle_list(
 			)
 			.await?;
 		for object in objects.iter() {
-			if let Some(version) = object
-				.versions()
-				.iter()
-				.find(|x| x.is_complete && x.data != ObjectVersionData::DeleteMarker)
-			{
+			if let Some(version) = object.versions().iter().find(|x| x.is_data()) {
 				if !object.key.starts_with(prefix) {
 					truncated = false;
 					break;
@@ -70,7 +65,9 @@ pub async fn handle_list(
 							last_modified: version.timestamp,
 							size: version.size,
 						},
-						Some(_lri) => return Err(Error::Message(format!("Duplicate key?? {}", object.key))),
+						Some(_lri) => {
+							return Err(Error::Message(format!("Duplicate key?? {}", object.key)))
+						}
 					};
 					result_keys.insert(object.key.clone(), info);
 				};

src/api/s3_put.rs

@@ -33,13 +33,13 @@ pub async fn handle_put(
 		timestamp: now_msec(),
 		mime_type: mime_type.to_string(),
 		size: first_block.len() as u64,
-		is_complete: false,
+		state: ObjectVersionState::Uploading,
 		data: ObjectVersionData::DeleteMarker,
 	};
 
 	if first_block.len() < INLINE_THRESHOLD {
 		object_version.data = ObjectVersionData::Inline(first_block);
-		object_version.is_complete = true;
+		object_version.state = ObjectVersionState::Complete;
 
 		let object = Object::new(bucket.into(), key.into(), vec![object_version]);
 		garage.object_table.insert(&object).await?;
@@ -54,7 +54,8 @@ pub async fn handle_put(
 	garage.object_table.insert(&object).await?;
 
 	let mut next_offset = first_block.len();
-	let mut put_curr_version_block = put_block_meta(garage.clone(), &version, 0, first_block_hash);
+	let mut put_curr_version_block =
+		put_block_meta(garage.clone(), &version, 0, 0, first_block_hash);
 	let mut put_curr_block = garage
 		.block_manager
 		.rpc_put_block(first_block_hash, first_block);
@@ -66,7 +67,7 @@ pub async fn handle_put(
 			let block_hash = hash(&block[..]);
 			let block_len = block.len();
 			put_curr_version_block =
-				put_block_meta(garage.clone(), &version, next_offset as u64, block_hash);
+				put_block_meta(garage.clone(), &version, 0, next_offset as u64, block_hash);
 			put_curr_block = garage.block_manager.rpc_put_block(block_hash, block);
 			next_offset += block_len;
 		} else {
@@ -76,7 +77,7 @@ pub async fn handle_put(
 
 	// TODO: if at any step we have an error, we should undo everything we did
 
-	object_version.is_complete = true;
+	object_version.state = ObjectVersionState::Complete;
 	object_version.size = next_offset as u64;
 
 	let object = Object::new(bucket.into(), key.into(), vec![object_version]);
@@ -88,12 +89,19 @@ pub async fn handle_put(
 async fn put_block_meta(
 	garage: Arc<Garage>,
 	version: &Version,
+	part_number: u64,
 	offset: u64,
 	hash: Hash,
 ) -> Result<(), Error> {
 	// TODO: don't clone, restart from empty block list ??
 	let mut version = version.clone();
-	version.add_block(VersionBlock { offset, hash }).unwrap();
+	version
+		.add_block(VersionBlock {
+			part_number,
+			offset,
+			hash,
+		})
+		.unwrap();
 
 	let block_ref = BlockRef {
 		block: hash,
@@ -180,7 +188,7 @@ pub async fn handle_delete(garage: Arc<Garage>, bucket: &str, key: &str) -> Resu
 			timestamp: now_msec(),
 			mime_type: "application/x-delete-marker".into(),
 			size: 0,
-			is_complete: true,
+			state: ObjectVersionState::Complete,
 			data: ObjectVersionData::DeleteMarker,
 		}],
 	);

src/core/object_table.rs

@@ -61,11 +61,31 @@ pub struct ObjectVersion {
 
 	pub mime_type: String,
 	pub size: u64,
-	pub is_complete: bool,
+	pub state: ObjectVersionState,
 
 	pub data: ObjectVersionData,
 }
 
+#[derive(PartialEq, Clone, Copy, Debug, Serialize, Deserialize)]
+pub enum ObjectVersionState {
+	Uploading,
+	Complete,
+	Aborted,
+}
+
+impl ObjectVersionState {
+	fn max(self, other: Self) -> Self {
+		use ObjectVersionState::*;
+		if self == Aborted || other == Aborted {
+			Aborted
+		} else if self == Complete || other == Complete {
+			Complete
+		} else {
+			Uploading
+		}
+	}
+}
+
 #[derive(PartialEq, Clone, Debug, Serialize, Deserialize)]
 pub enum ObjectVersionData {
 	DeleteMarker,
@@ -74,8 +94,14 @@ pub enum ObjectVersionData {
 }
 
 impl ObjectVersion {
-	fn cmp_key(&self) -> (u64, &UUID) {
-		(self.timestamp, &self.uuid)
+	fn cmp_key(&self) -> (u64, UUID) {
+		(self.timestamp, self.uuid)
+	}
+	pub fn is_complete(&self) -> bool {
+		self.state == ObjectVersionState::Complete
+	}
+	pub fn is_data(&self) -> bool {
+		self.state == ObjectVersionState::Complete && self.data != ObjectVersionData::DeleteMarker
 	}
 }
 
@@ -98,9 +124,7 @@ impl Entry<String, String> for Object {
 					if other_v.size > v.size {
 						v.size = other_v.size;
 					}
-					if other_v.is_complete && !v.is_complete {
-						v.is_complete = true;
-					}
+					v.state = v.state.max(other_v.state);
 				}
 				Err(i) => {
 					self.versions.insert(i, other_v.clone());
@@ -112,7 +136,7 @@ impl Entry<String, String> for Object {
 			.iter()
 			.enumerate()
 			.rev()
-			.filter(|(_, v)| v.is_complete)
+			.filter(|(_, v)| v.is_complete())
 			.next()
 			.map(|(vi, _)| vi);
 
@@ -159,9 +183,6 @@ impl TableSchema for ObjectTable {
 	}
 
 	fn matches_filter(entry: &Self::E, _filter: &Self::Filter) -> bool {
-		entry
-			.versions
-			.iter()
-			.any(|x| x.is_complete && x.data != ObjectVersionData::DeleteMarker)
+		entry.versions.iter().any(|v| v.is_data())
 	}
 }

src/core/version_table.rs

@@ -64,6 +64,7 @@ impl Version {
 
 #[derive(PartialEq, Clone, Debug, Serialize, Deserialize)]
 pub struct VersionBlock {
+	pub part_number: u64,
 	pub offset: u64,
 	pub hash: Hash,
 }