Add a repair step to fix broken mounts

Signed-off-by: Joas Schilling <coding@schilljs.com>

lib/private/Repair.php

@@ -37,6 +37,7 @@ use OC\Repair\Collation;
 use OC\Repair\DropOldJobs;
 use OC\Repair\MoveUpdaterStepFile;
 use OC\Repair\NC11\CleanPreviews;
+use OC\Repair\NC11\FixMountStorages;
 use OC\Repair\NC11\MoveAvatars;
 use OC\Repair\OldGroupMembershipShares;
 use OC\Repair\RemoveGetETagEntries;
@@ -161,6 +162,7 @@ class Repair implements IOutput{
 				\OC::$server->getUserManager(),
 				\OC::$server->getConfig()
 			),
+			new FixMountStorages(\OC::$server->getDatabaseConnection()),
 		];
 	}
 

lib/private/Repair/NC11/FixMountStorages.php

@@ -0,0 +1,78 @@
+<?php
+/**
+ * @copyright 2016 Joas Schilling <coding@schilljs.com>
+ *
+ * @author Joas Schilling <coding@schilljs.com>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+namespace OC\Repair\NC11;
+
+use OCP\DB\QueryBuilder\IQueryBuilder;
+use OCP\IDBConnection;
+use OCP\Migration\IOutput;
+use OCP\Migration\IRepairStep;
+
+class FixMountStorages implements IRepairStep {
+
+	/** @var IDBConnection */
+	private $db;
+
+	/**
+	 * @param IDBConnection $db
+	 */
+	public function __construct(IDBConnection $db) {
+		$this->db = $db;
+	}
+
+	/**
+	 * @return string
+	 */
+	public function getName() {
+		return 'Fix potential broken mount points';
+	}
+
+	public function run(IOutput $output) {
+		$query = $this->db->getQueryBuilder();
+		$query->select('m.id', 'f.storage')
+			->from('mounts', 'm')
+			->leftJoin('m', 'filecache', 'f', $query->expr()->eq('m.root_id', 'f.fileid'))
+			->where($query->expr()->neq('m.storage_id', 'f.storage'));
+
+		$update = $this->db->getQueryBuilder();
+		$update->update('mounts')
+			->set('storage_id', $update->createParameter('storage'))
+			->where($query->expr()->eq('id', $update->createParameter('mount')));
+
+		$result = $query->execute();
+		$entriesUpdated = 0;
+		while ($row = $result->fetch()) {
+			$update->setParameter('storage', $row['storage'], IQueryBuilder::PARAM_INT)
+				->setParameter('mount', $row['id'], IQueryBuilder::PARAM_INT);
+			$update->execute();
+			$entriesUpdated++;
+		}
+		$result->closeCursor();
+
+		if ($entriesUpdated > 0) {
+			$output->info($entriesUpdated . ' mounts updated');
+			return;
+		}
+
+		$output->info('No mounts updated');
+	}
+}