fix: fix user folder init

Signed-off-by: Robin Appelman <robin@icewind.nl>

lib/private/Files/Config/UserMountCache.php

@@ -94,7 +94,7 @@ class UserMountCache implements IUserMountCache {
 
 		$cachedMounts = $this->getMountsForUser($user);
 		if (is_array($mountProviderClasses)) {
-			$cachedMounts = array_filter($cachedMounts, function (ICachedMountInfo $mountInfo) use ($mountProviderClasses, $newMounts) {
+			$cachedMounts = array_filter($cachedMounts, function (ICachedMountInfo $mountInfo) use ($mountProviderClasses, $newMounts): bool {
 				// for existing mounts that didn't have a mount provider set
 				// we still want the ones that map to new mounts
 				if ($mountInfo->getMountProvider() === '' && isset($newMounts[$mountInfo->getKey()])) {

lib/private/Files/ObjectStore/ObjectStoreStorage.php

@@ -82,6 +82,14 @@ class ObjectStoreStorage extends \OC\Files\Storage\Common implements IChunkedFil
 		if (isset($params['validateWrites'])) {
 			$this->validateWrites = (bool)$params['validateWrites'];
 		}
+
+		// home storage is setup in the SetupManager
+		if (!$this instanceof HomeObjectStoreStorage) {
+			//initialize cache with root directory in cache
+			if (!$this->is_dir('/')) {
+				$this->mkdir('/');
+			}
+		}
 		$this->handleCopiesAsOwned = (bool)($params['handleCopiesAsOwned'] ?? false);
 
 		$this->logger = \OCP\Server::get(LoggerInterface::class);

lib/private/Files/SetupManager.php

@@ -257,8 +257,10 @@ class SetupManager {
 
 			if ($homeMount->getStorageRootId() === -1) {
 				$this->eventLogger->start('fs:setup:user:home:scan', 'Scan home filesystem for user');
-				$homeMount->getStorage()->mkdir('');
-				$homeMount->getStorage()->getScanner()->scan('');
+				$homeStorage = $homeMount->getStorage();
+				$homeStorage->mkdir('');
+				$homeStorage->mkdir('files');
+				$homeStorage->getScanner()->scan('');
 				$this->eventLogger->end('fs:setup:user:home:scan');
 			}