From 4ef84a0558c0bf6641094e762ede0c962781204d Mon Sep 17 00:00:00 2001
From: Alex Auvolat <alex@adnab.me>
Date: Thu, 23 Apr 2020 18:36:12 +0000
Subject: Move repair to separate file

---
 src/store/repair.rs | 184 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 184 insertions(+)
 create mode 100644 src/store/repair.rs

(limited to 'src/store/repair.rs')

diff --git a/src/store/repair.rs b/src/store/repair.rs
new file mode 100644
index 00000000..39c57fc1
--- /dev/null
+++ b/src/store/repair.rs
@@ -0,0 +1,184 @@
+use std::sync::Arc;
+
+use tokio::sync::watch;
+
+use crate::error::Error;
+use crate::server::Garage;
+use crate::table::*;
+
+use crate::store::block_ref_table::*;
+use crate::store::version_table::*;
+
+use crate::*;
+
+pub struct Repair {
+	pub garage: Arc<Garage>,
+}
+
+impl Repair {
+	pub async fn repair_worker(
+		&self,
+		opt: RepairOpt,
+		must_exit: watch::Receiver<bool>,
+	) -> Result<(), Error> {
+		let todo = |x| opt.what.as_ref().map(|y| *y == x).unwrap_or(true);
+
+		if todo(RepairWhat::Tables) {
+			info!("Launching a full sync of tables");
+			self.garage
+				.bucket_table
+				.syncer
+				.load_full()
+				.unwrap()
+				.add_full_scan()
+				.await;
+			self.garage
+				.object_table
+				.syncer
+				.load_full()
+				.unwrap()
+				.add_full_scan()
+				.await;
+			self.garage
+				.version_table
+				.syncer
+				.load_full()
+				.unwrap()
+				.add_full_scan()
+				.await;
+			self.garage
+				.block_ref_table
+				.syncer
+				.load_full()
+				.unwrap()
+				.add_full_scan()
+				.await;
+		}
+
+		// TODO: wait for full sync to finish before proceeding to the rest?
+
+		if todo(RepairWhat::Versions) {
+			info!("Repairing the versions table");
+			self.repair_versions(&must_exit).await?;
+		}
+
+		if todo(RepairWhat::BlockRefs) {
+			info!("Repairing the block refs table");
+			self.repair_block_ref(&must_exit).await?;
+		}
+
+		if opt.what.is_none() {
+			info!("Repairing the RC");
+			self.repair_rc(&must_exit).await?;
+		}
+
+		if todo(RepairWhat::Blocks) {
+			info!("Repairing the stored blocks");
+			self.garage
+				.block_manager
+				.repair_data_store(&must_exit)
+				.await?;
+		}
+
+		Ok(())
+	}
+
+	async fn repair_versions(&self, must_exit: &watch::Receiver<bool>) -> Result<(), Error> {
+		let mut pos = vec![];
+
+		while let Some((item_key, item_bytes)) = self.garage.version_table.store.get_gt(&pos)? {
+			pos = item_key.to_vec();
+
+			let version = rmp_serde::decode::from_read_ref::<_, Version>(item_bytes.as_ref())?;
+			if version.deleted {
+				continue;
+			}
+			let object = self
+				.garage
+				.object_table
+				.get(&version.bucket, &version.key)
+				.await?;
+			let version_exists = match object {
+				Some(o) => o.versions().iter().any(|x| x.uuid == version.uuid),
+				None => {
+					warn!(
+						"Repair versions: object for version {:?} not found",
+						version
+					);
+					false
+				}
+			};
+			if !version_exists {
+				info!("Repair versions: marking version as deleted: {:?}", version);
+				self.garage
+					.version_table
+					.insert(&Version::new(
+						version.uuid,
+						version.bucket,
+						version.key,
+						true,
+						vec![],
+					))
+					.await?;
+			}
+
+			if *must_exit.borrow() {
+				break;
+			}
+		}
+		Ok(())
+	}
+
+	async fn repair_block_ref(&self, must_exit: &watch::Receiver<bool>) -> Result<(), Error> {
+		let mut pos = vec![];
+
+		while let Some((item_key, item_bytes)) = self.garage.block_ref_table.store.get_gt(&pos)? {
+			pos = item_key.to_vec();
+
+			let block_ref = rmp_serde::decode::from_read_ref::<_, BlockRef>(item_bytes.as_ref())?;
+			if block_ref.deleted {
+				continue;
+			}
+			let version = self
+				.garage
+				.version_table
+				.get(&block_ref.version, &EmptyKey)
+				.await?;
+			let ref_exists = match version {
+				Some(v) => !v.deleted,
+				None => {
+					warn!(
+						"Block ref repair: version for block ref {:?} not found",
+						block_ref
+					);
+					false
+				}
+			};
+			if !ref_exists {
+				info!(
+					"Repair block ref: marking block_ref as deleted: {:?}",
+					block_ref
+				);
+				self.garage
+					.block_ref_table
+					.insert(&BlockRef {
+						block: block_ref.block,
+						version: block_ref.version,
+						deleted: true,
+					})
+					.await?;
+			}
+
+			if *must_exit.borrow() {
+				break;
+			}
+		}
+		Ok(())
+	}
+
+	async fn repair_rc(&self, _must_exit: &watch::Receiver<bool>) -> Result<(), Error> {
+		// TODO
+		warn!("repair_rc: not implemented");
+		Ok(())
+	}
+}
-- 
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