[stable26] allow storing multiple mounts for the same rootid in the mount cache

core/Application.php

@@ -239,6 +239,9 @@ function (GenericEvent $event) use ($container) {
 					if (!$table->hasIndex('mounts_class_index')) {
 						$subject->addHintForMissingSubject($table->getName(), 'mounts_class_index');
 					}
+					if (!$table->hasIndex('mounts_user_root_path_index')) {
+						$subject->addHintForMissingSubject($table->getName(), 'mounts_user_root_path_index');
+					}
 				}
 			}
 		);

core/Command/Db/AddMissingIndices.php

@@ -465,6 +465,14 @@ private function addCoreIndexes(OutputInterface $output, bool $dryRun): void {
 				$updated = true;
 				$output->writeln('<info>oc_mounts table updated successfully.</info>');
 			}
+			if (!$table->hasIndex('mounts_user_root_path_index')) {
+				$output->writeln('<info>Adding mounts_user_root_path_index index to the oc_mounts table, this can take some time...</info>');
+
+				$table->addIndex(['user_id', 'root_id', 'mount_point'], 'mounts_user_root_path_index', [], ['lengths' => [null, null, 128]]);
+				$this->connection->migrateToSchema($schema->getWrappedSchema());
+				$updated = true;
+				$output->writeln('<info>oc_mounts table updated successfully.</info>');
+			}
 		}
 
 		if (!$updated) {

core/Migrations/Version13000Date20170718121200.php

@@ -149,7 +149,7 @@ public function changeSchema(IOutput $output, \Closure $schemaClosure, array $op
 			$table->addIndex(['storage_id'], 'mounts_storage_index');
 			$table->addIndex(['root_id'], 'mounts_root_index');
 			$table->addIndex(['mount_id'], 'mounts_mount_id_index');
-			$table->addUniqueIndex(['user_id', 'root_id'], 'mounts_user_root_index');
+			$table->addIndex(['user_id', 'root_id', 'mount_point'], 'mounts_user_root_path_index', [], ['lengths' => [null, null, 128]]);
 		} else {
 			$table = $schema->getTable('mounts');
 			$table->addColumn('mount_id', Types::BIGINT, [

core/Migrations/Version27000Date20220613163520.php

@@ -0,0 +1,51 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @copyright Copyright (c) 2022 Your name <[email protected]>
+ *
+ * @author Your name <[email protected]>
+ *
+ * @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\Core\Migrations;
+
+use Closure;
+use OCP\DB\ISchemaWrapper;
+use OCP\Migration\IOutput;
+use OCP\Migration\SimpleMigrationStep;
+
+class Version27000Date20220613163520 extends SimpleMigrationStep {
+	public function name(): string {
+		return "Add mountpoint path to mounts table unique index";
+	}
+
+	public function changeSchema(IOutput $output, Closure $schemaClosure, array $options): ?ISchemaWrapper {
+		/** @var ISchemaWrapper $schema */
+		$schema = $schemaClosure();
+
+		$table = $schema->getTable('mounts');
+		if ($table->hasIndex('mounts_user_root_index')) {
+			$table->dropIndex('mounts_user_root_index');
+			// new index gets added with "add missing indexes"
+		}
+
+		return $schema;
+	}
+}

lib/composer/composer/autoload_classmap.php

@@ -1089,6 +1089,7 @@
     'OC\\Core\\Migrations\\Version25000Date20220602190540' => $baseDir . '/core/Migrations/Version25000Date20220602190540.php',
     'OC\\Core\\Migrations\\Version25000Date20220905140840' => $baseDir . '/core/Migrations/Version25000Date20220905140840.php',
     'OC\\Core\\Migrations\\Version25000Date20221007010957' => $baseDir . '/core/Migrations/Version25000Date20221007010957.php',
+    'OC\\Core\\Migrations\\Version27000Date20220613163520' => $baseDir . '/core/Migrations/Version27000Date20220613163520.php',
     'OC\\Core\\Migrations\\Version27000Date20230309104325' => $baseDir . '/core/Migrations/Version27000Date20230309104325.php',
     'OC\\Core\\Migrations\\Version27000Date20230309104802' => $baseDir . '/core/Migrations/Version27000Date20230309104802.php',
     'OC\\Core\\Notification\\CoreNotifier' => $baseDir . '/core/Notification/CoreNotifier.php',

lib/composer/composer/autoload_static.php

@@ -1122,6 +1122,7 @@ class ComposerStaticInit749170dad3f5e7f9ca158f5a9f04f6a2
         'OC\\Core\\Migrations\\Version25000Date20220602190540' => __DIR__ . '/../../..' . '/core/Migrations/Version25000Date20220602190540.php',
         'OC\\Core\\Migrations\\Version25000Date20220905140840' => __DIR__ . '/../../..' . '/core/Migrations/Version25000Date20220905140840.php',
         'OC\\Core\\Migrations\\Version25000Date20221007010957' => __DIR__ . '/../../..' . '/core/Migrations/Version25000Date20221007010957.php',
+        'OC\\Core\\Migrations\\Version27000Date20220613163520' => __DIR__ . '/../../..' . '/core/Migrations/Version27000Date20220613163520.php',
         'OC\\Core\\Migrations\\Version27000Date20230309104325' => __DIR__ . '/../../..' . '/core/Migrations/Version27000Date20230309104325.php',
         'OC\\Core\\Migrations\\Version27000Date20230309104802' => __DIR__ . '/../../..' . '/core/Migrations/Version27000Date20230309104802.php',
         'OC\\Core\\Notification\\CoreNotifier' => __DIR__ . '/../../..' . '/core/Notification/CoreNotifier.php',

lib/private/Files/Config/UserMountCache.php

@@ -92,38 +92,39 @@ public function registerMounts(IUser $user, array $mounts, array $mountProviderC
 			}
 		}, $mounts);
 		$newMounts = array_values(array_filter($newMounts));
-		$newMountRootIds = array_map(function (ICachedMountInfo $mount) {
-			return $mount->getRootId();
+		$newMountKeys = array_map(function (ICachedMountInfo $mount) {
+			return $mount->getRootId() . '::' . $mount->getMountPoint();
 		}, $newMounts);
-		$newMounts = array_combine($newMountRootIds, $newMounts);
+		$newMounts = array_combine($newMountKeys, $newMounts);
 
 		$cachedMounts = $this->getMountsForUser($user);
 		if (is_array($mountProviderClasses)) {
 			$cachedMounts = array_filter($cachedMounts, function (ICachedMountInfo $mountInfo) use ($mountProviderClasses, $newMounts) {
 				// for existing mounts that didn't have a mount provider set
 				// we still want the ones that map to new mounts
-				if ($mountInfo->getMountProvider() === '' && isset($newMounts[$mountInfo->getRootId()])) {
+				$mountKey = $mountInfo->getRootId() . '::' . $mountInfo->getMountPoint();
+				if ($mountInfo->getMountProvider() === '' && isset($newMounts[$mountKey])) {
 					return true;
 				}
 				return in_array($mountInfo->getMountProvider(), $mountProviderClasses);
 			});
 		}
-		$cachedMountRootIds = array_map(function (ICachedMountInfo $mount) {
-			return $mount->getRootId();
+		$cachedRootKeys = array_map(function (ICachedMountInfo $mount) {
+			return $mount->getRootId() . '::' . $mount->getMountPoint();
 		}, $cachedMounts);
-		$cachedMounts = array_combine($cachedMountRootIds, $cachedMounts);
+		$cachedMounts = array_combine($cachedRootKeys, $cachedMounts);
 
 		$addedMounts = [];
 		$removedMounts = [];
 
-		foreach ($newMounts as $rootId => $newMount) {
-			if (!isset($cachedMounts[$rootId])) {
+		foreach ($newMounts as $mountKey => $newMount) {
+			if (!isset($cachedMounts[$mountKey])) {
 				$addedMounts[] = $newMount;
 			}
 		}
 
-		foreach ($cachedMounts as $rootId => $cachedMount) {
-			if (!isset($newMounts[$rootId])) {
+		foreach ($cachedMounts as $mountKey => $cachedMount) {
+			if (!isset($newMounts[$mountKey])) {
 				$removedMounts[] = $cachedMount;
 			}
 		}
@@ -154,13 +155,13 @@ public function registerMounts(IUser $user, array $mounts, array $mountProviderC
 	private function findChangedMounts(array $newMounts, array $cachedMounts) {
 		$new = [];
 		foreach ($newMounts as $mount) {
-			$new[$mount->getRootId()] = $mount;
+			$new[$mount->getRootId() . '::' . $mount->getMountPoint()] = $mount;
 		}
 		$changed = [];
 		foreach ($cachedMounts as $cachedMount) {
-			$rootId = $cachedMount->getRootId();
-			if (isset($new[$rootId])) {
-				$newMount = $new[$rootId];
+			$key = $cachedMount->getRootId() . '::' . $cachedMount->getMountPoint();
+			if (isset($new[$key])) {
+				$newMount = $new[$key];
 				if (
 					$newMount->getMountPoint() !== $cachedMount->getMountPoint() ||
 					$newMount->getStorageId() !== $cachedMount->getStorageId() ||
@@ -183,7 +184,7 @@ private function addToCache(ICachedMountInfo $mount) {
 				'mount_point' => $mount->getMountPoint(),
 				'mount_id' => $mount->getMountId(),
 				'mount_provider_class' => $mount->getMountProvider(),
-			], ['root_id', 'user_id']);
+			], ['root_id', 'user_id', 'mount_point']);
 		} else {
 			// in some cases this is legitimate, like orphaned shares
 			$this->logger->debug('Could not get storage info for mount at ' . $mount->getMountPoint());
@@ -209,7 +210,8 @@ private function removeFromCache(ICachedMountInfo $mount) {
 
 		$query = $builder->delete('mounts')
 			->where($builder->expr()->eq('user_id', $builder->createNamedParameter($mount->getUser()->getUID())))
-			->andWhere($builder->expr()->eq('root_id', $builder->createNamedParameter($mount->getRootId(), IQueryBuilder::PARAM_INT)));
+			->andWhere($builder->expr()->eq('root_id', $builder->createNamedParameter($mount->getRootId(), IQueryBuilder::PARAM_INT)))
+			->andWhere($builder->expr()->eq('mount_point', $builder->createNamedParameter($mount->getMountPoint())));
 		$query->execute();
 	}