nextcloud / server

lib/private/Files/View.php

Indentation +2228 added lines, -2228 removed lines

@@ -60,2232 +60,2232 @@
  * @internal Since 33.0.0. use IRootFolder and the Folder/File/Node API instead in new code.
  */
 class View {
-	private string $fakeRoot = '';
-	private ILockingProvider $lockingProvider;
-	private bool $lockingEnabled;
-	private bool $updaterEnabled = true;
-	private UserManager $userManager;
-	private LoggerInterface $logger;
-
-	/**
-	 * @throws \Exception If $root contains an invalid path
-	 */
-	public function __construct(string $root = '') {
-		if (!Filesystem::isValidPath($root)) {
-			throw new \Exception();
-		}
-
-		$this->fakeRoot = $root;
-		$this->lockingProvider = \OC::$server->get(ILockingProvider::class);
-		$this->lockingEnabled = !($this->lockingProvider instanceof \OC\Lock\NoopLockingProvider);
-		$this->userManager = \OC::$server->getUserManager();
-		$this->logger = \OC::$server->get(LoggerInterface::class);
-	}
-
-	/**
-	 * @param ?string $path
-	 * @psalm-template S as string|null
-	 * @psalm-param S $path
-	 * @psalm-return (S is string ? string : null)
-	 */
-	public function getAbsolutePath($path = '/'): ?string {
-		if ($path === null) {
-			return null;
-		}
-		$this->assertPathLength($path);
-		return PathHelper::normalizePath($this->fakeRoot . '/' . $path);
-	}
-
-	/**
-	 * Change the root to a fake root
-	 *
-	 * @param string $fakeRoot
-	 */
-	public function chroot($fakeRoot): void {
-		if (!$fakeRoot == '') {
-			if ($fakeRoot[0] !== '/') {
-				$fakeRoot = '/' . $fakeRoot;
-			}
-		}
-		$this->fakeRoot = $fakeRoot;
-	}
-
-	/**
-	 * Get the fake root
-	 */
-	public function getRoot(): string {
-		return $this->fakeRoot;
-	}
-
-	/**
-	 * get path relative to the root of the view
-	 *
-	 * @param string $path
-	 */
-	public function getRelativePath($path): ?string {
-		$this->assertPathLength($path);
-		if ($this->fakeRoot == '') {
-			return $path;
-		}
-
-		if (rtrim($path, '/') === rtrim($this->fakeRoot, '/')) {
-			return '/';
-		}
-
-		// missing slashes can cause wrong matches!
-		$root = rtrim($this->fakeRoot, '/') . '/';
-
-		if (!str_starts_with($path, $root)) {
-			return null;
-		} else {
-			$path = substr($path, strlen($this->fakeRoot));
-			if (strlen($path) === 0) {
-				return '/';
-			} else {
-				return $path;
-			}
-		}
-	}
-
-	/**
-	 * Get the mountpoint of the storage object for a path
-	 * ( note: because a storage is not always mounted inside the fakeroot, the
-	 * returned mountpoint is relative to the absolute root of the filesystem
-	 * and does not take the chroot into account )
-	 *
-	 * @param string $path
-	 */
-	public function getMountPoint($path): string {
-		return Filesystem::getMountPoint($this->getAbsolutePath($path));
-	}
-
-	/**
-	 * Get the mountpoint of the storage object for a path
-	 * ( note: because a storage is not always mounted inside the fakeroot, the
-	 * returned mountpoint is relative to the absolute root of the filesystem
-	 * and does not take the chroot into account )
-	 *
-	 * @param string $path
-	 */
-	public function getMount($path): IMountPoint {
-		return Filesystem::getMountManager()->find($this->getAbsolutePath($path));
-	}
-
-	/**
-	 * Resolve a path to a storage and internal path
-	 *
-	 * @param string $path
-	 * @return array{?\OCP\Files\Storage\IStorage, string} an array consisting of the storage and the internal path
-	 */
-	public function resolvePath($path): array {
-		$a = $this->getAbsolutePath($path);
-		$p = Filesystem::normalizePath($a);
-		return Filesystem::resolvePath($p);
-	}
-
-	/**
-	 * Return the path to a local version of the file
-	 * we need this because we can't know if a file is stored local or not from
-	 * outside the filestorage and for some purposes a local file is needed
-	 *
-	 * @param string $path
-	 */
-	public function getLocalFile($path): string|false {
-		$parent = substr($path, 0, strrpos($path, '/') ?: 0);
-		$path = $this->getAbsolutePath($path);
-		[$storage, $internalPath] = Filesystem::resolvePath($path);
-		if (Filesystem::isValidPath($parent) && $storage) {
-			return $storage->getLocalFile($internalPath);
-		} else {
-			return false;
-		}
-	}
-
-	/**
-	 * the following functions operate with arguments and return values identical
-	 * to those of their PHP built-in equivalents. Mostly they are merely wrappers
-	 * for \OC\Files\Storage\Storage via basicOperation().
-	 */
-	public function mkdir($path) {
-		return $this->basicOperation('mkdir', $path, ['create', 'write']);
-	}
-
-	/**
-	 * remove mount point
-	 *
-	 * @param IMountPoint $mount
-	 * @param string $path relative to data/
-	 */
-	protected function removeMount($mount, $path): bool {
-		if ($mount instanceof MoveableMount) {
-			// cut of /user/files to get the relative path to data/user/files
-			$pathParts = explode('/', $path, 4);
-			$relPath = '/' . $pathParts[3];
-			$this->lockFile($relPath, ILockingProvider::LOCK_SHARED, true);
-			\OC_Hook::emit(
-				Filesystem::CLASSNAME, 'umount',
-				[Filesystem::signal_param_path => $relPath]
-			);
-			$this->changeLock($relPath, ILockingProvider::LOCK_EXCLUSIVE, true);
-			$result = $mount->removeMount();
-			$this->changeLock($relPath, ILockingProvider::LOCK_SHARED, true);
-			if ($result) {
-				\OC_Hook::emit(
-					Filesystem::CLASSNAME, 'post_umount',
-					[Filesystem::signal_param_path => $relPath]
-				);
-			}
-			$this->unlockFile($relPath, ILockingProvider::LOCK_SHARED, true);
-			return $result;
-		} else {
-			// do not allow deleting the storage's root / the mount point
-			// because for some storages it might delete the whole contents
-			// but isn't supposed to work that way
-			return false;
-		}
-	}
-
-	public function disableCacheUpdate(): void {
-		$this->updaterEnabled = false;
-	}
-
-	public function enableCacheUpdate(): void {
-		$this->updaterEnabled = true;
-	}
-
-	protected function writeUpdate(Storage $storage, string $internalPath, ?int $time = null, ?int $sizeDifference = null): void {
-		if ($this->updaterEnabled) {
-			if (is_null($time)) {
-				$time = time();
-			}
-			$storage->getUpdater()->update($internalPath, $time, $sizeDifference);
-		}
-	}
-
-	protected function removeUpdate(Storage $storage, string $internalPath): void {
-		if ($this->updaterEnabled) {
-			$storage->getUpdater()->remove($internalPath);
-		}
-	}
-
-	protected function renameUpdate(Storage $sourceStorage, Storage $targetStorage, string $sourceInternalPath, string $targetInternalPath): void {
-		if ($this->updaterEnabled) {
-			$targetStorage->getUpdater()->renameFromStorage($sourceStorage, $sourceInternalPath, $targetInternalPath);
-		}
-	}
-
-	protected function copyUpdate(Storage $sourceStorage, Storage $targetStorage, string $sourceInternalPath, string $targetInternalPath): void {
-		if ($this->updaterEnabled) {
-			$targetStorage->getUpdater()->copyFromStorage($sourceStorage, $sourceInternalPath, $targetInternalPath);
-		}
-	}
-
-	/**
-	 * @param string $path
-	 * @return bool|mixed
-	 */
-	public function rmdir($path) {
-		$absolutePath = $this->getAbsolutePath($path);
-		$mount = Filesystem::getMountManager()->find($absolutePath);
-		if ($mount->getInternalPath($absolutePath) === '') {
-			return $this->removeMount($mount, $absolutePath);
-		}
-		if ($this->is_dir($path)) {
-			$result = $this->basicOperation('rmdir', $path, ['delete']);
-		} else {
-			$result = false;
-		}
-
-		if (!$result && !$this->file_exists($path)) { //clear ghost files from the cache on delete
-			$storage = $mount->getStorage();
-			$internalPath = $mount->getInternalPath($absolutePath);
-			$storage->getUpdater()->remove($internalPath);
-		}
-		return $result;
-	}
-
-	/**
-	 * @param string $path
-	 * @return resource|false
-	 */
-	public function opendir($path) {
-		return $this->basicOperation('opendir', $path, ['read']);
-	}
-
-	/**
-	 * @param string $path
-	 * @return bool|mixed
-	 */
-	public function is_dir($path) {
-		if ($path == '/') {
-			return true;
-		}
-		return $this->basicOperation('is_dir', $path);
-	}
-
-	/**
-	 * @param string $path
-	 * @return bool|mixed
-	 */
-	public function is_file($path) {
-		if ($path == '/') {
-			return false;
-		}
-		return $this->basicOperation('is_file', $path);
-	}
-
-	/**
-	 * @param string $path
-	 * @return mixed
-	 */
-	public function stat($path) {
-		return $this->basicOperation('stat', $path);
-	}
-
-	/**
-	 * @param string $path
-	 * @return mixed
-	 */
-	public function filetype($path) {
-		return $this->basicOperation('filetype', $path);
-	}
-
-	/**
-	 * @param string $path
-	 * @return mixed
-	 */
-	public function filesize(string $path) {
-		return $this->basicOperation('filesize', $path);
-	}
-
-	/**
-	 * @param string $path
-	 * @return bool|mixed
-	 * @throws InvalidPathException
-	 */
-	public function readfile($path) {
-		$this->assertPathLength($path);
-		if (ob_get_level()) {
-			ob_end_clean();
-		}
-		$handle = $this->fopen($path, 'rb');
-		if ($handle) {
-			$chunkSize = 524288; // 512 kiB chunks
-			while (!feof($handle)) {
-				echo fread($handle, $chunkSize);
-				flush();
-				$this->checkConnectionStatus();
-			}
-			fclose($handle);
-			return $this->filesize($path);
-		}
-		return false;
-	}
-
-	/**
-	 * @param string $path
-	 * @param int $from
-	 * @param int $to
-	 * @return bool|mixed
-	 * @throws InvalidPathException
-	 * @throws \OCP\Files\UnseekableException
-	 */
-	public function readfilePart($path, $from, $to) {
-		$this->assertPathLength($path);
-		if (ob_get_level()) {
-			ob_end_clean();
-		}
-		$handle = $this->fopen($path, 'rb');
-		if ($handle) {
-			$chunkSize = 524288; // 512 kiB chunks
-			$startReading = true;
-
-			if ($from !== 0 && $from !== '0' && fseek($handle, $from) !== 0) {
-				// forward file handle via chunked fread because fseek seem to have failed
-
-				$end = $from + 1;
-				while (!feof($handle) && ftell($handle) < $end && ftell($handle) !== $from) {
-					$len = $from - ftell($handle);
-					if ($len > $chunkSize) {
-						$len = $chunkSize;
-					}
-					$result = fread($handle, $len);
-
-					if ($result === false) {
-						$startReading = false;
-						break;
-					}
-				}
-			}
-
-			if ($startReading) {
-				$end = $to + 1;
-				while (!feof($handle) && ftell($handle) < $end) {
-					$len = $end - ftell($handle);
-					if ($len > $chunkSize) {
-						$len = $chunkSize;
-					}
-					echo fread($handle, $len);
-					flush();
-					$this->checkConnectionStatus();
-				}
-				return ftell($handle) - $from;
-			}
-
-			throw new \OCP\Files\UnseekableException('fseek error');
-		}
-		return false;
-	}
-
-	private function checkConnectionStatus(): void {
-		$connectionStatus = \connection_status();
-		if ($connectionStatus !== CONNECTION_NORMAL) {
-			throw new ConnectionLostException("Connection lost. Status: $connectionStatus");
-		}
-	}
-
-	/**
-	 * @param string $path
-	 * @return mixed
-	 */
-	public function isCreatable($path) {
-		return $this->basicOperation('isCreatable', $path);
-	}
-
-	/**
-	 * @param string $path
-	 * @return mixed
-	 */
-	public function isReadable($path) {
-		return $this->basicOperation('isReadable', $path);
-	}
-
-	/**
-	 * @param string $path
-	 * @return mixed
-	 */
-	public function isUpdatable($path) {
-		return $this->basicOperation('isUpdatable', $path);
-	}
-
-	/**
-	 * @param string $path
-	 * @return bool|mixed
-	 */
-	public function isDeletable($path) {
-		$absolutePath = $this->getAbsolutePath($path);
-		$mount = Filesystem::getMountManager()->find($absolutePath);
-		if ($mount->getInternalPath($absolutePath) === '') {
-			return $mount instanceof MoveableMount;
-		}
-		return $this->basicOperation('isDeletable', $path);
-	}
-
-	/**
-	 * @param string $path
-	 * @return mixed
-	 */
-	public function isSharable($path) {
-		return $this->basicOperation('isSharable', $path);
-	}
-
-	/**
-	 * @param string $path
-	 * @return bool|mixed
-	 */
-	public function file_exists($path) {
-		if ($path == '/') {
-			return true;
-		}
-		return $this->basicOperation('file_exists', $path);
-	}
-
-	/**
-	 * @param string $path
-	 * @return mixed
-	 */
-	public function filemtime($path) {
-		return $this->basicOperation('filemtime', $path);
-	}
-
-	/**
-	 * @param string $path
-	 * @param int|string $mtime
-	 */
-	public function touch($path, $mtime = null): bool {
-		if (!is_null($mtime) && !is_numeric($mtime)) {
-			$mtime = strtotime($mtime);
-		}
-
-		$hooks = ['touch'];
-
-		if (!$this->file_exists($path)) {
-			$hooks[] = 'create';
-			$hooks[] = 'write';
-		}
-		try {
-			$result = $this->basicOperation('touch', $path, $hooks, $mtime);
-		} catch (\Exception $e) {
-			$this->logger->info('Error while setting modified time', ['app' => 'core', 'exception' => $e]);
-			$result = false;
-		}
-		if (!$result) {
-			// If create file fails because of permissions on external storage like SMB folders,
-			// check file exists and return false if not.
-			if (!$this->file_exists($path)) {
-				return false;
-			}
-			if (is_null($mtime)) {
-				$mtime = time();
-			}
-			//if native touch fails, we emulate it by changing the mtime in the cache
-			$this->putFileInfo($path, ['mtime' => floor($mtime)]);
-		}
-		return true;
-	}
-
-	/**
-	 * @param string $path
-	 * @return string|false
-	 * @throws LockedException
-	 */
-	public function file_get_contents($path) {
-		return $this->basicOperation('file_get_contents', $path, ['read']);
-	}
-
-	protected function emit_file_hooks_pre(bool $exists, string $path, bool &$run): void {
-		if (!$exists) {
-			\OC_Hook::emit(Filesystem::CLASSNAME, Filesystem::signal_create, [
-				Filesystem::signal_param_path => $this->getHookPath($path),
-				Filesystem::signal_param_run => &$run,
-			]);
-		} else {
-			\OC_Hook::emit(Filesystem::CLASSNAME, Filesystem::signal_update, [
-				Filesystem::signal_param_path => $this->getHookPath($path),
-				Filesystem::signal_param_run => &$run,
-			]);
-		}
-		\OC_Hook::emit(Filesystem::CLASSNAME, Filesystem::signal_write, [
-			Filesystem::signal_param_path => $this->getHookPath($path),
-			Filesystem::signal_param_run => &$run,
-		]);
-	}
-
-	protected function emit_file_hooks_post(bool $exists, string $path): void {
-		if (!$exists) {
-			\OC_Hook::emit(Filesystem::CLASSNAME, Filesystem::signal_post_create, [
-				Filesystem::signal_param_path => $this->getHookPath($path),
-			]);
-		} else {
-			\OC_Hook::emit(Filesystem::CLASSNAME, Filesystem::signal_post_update, [
-				Filesystem::signal_param_path => $this->getHookPath($path),
-			]);
-		}
-		\OC_Hook::emit(Filesystem::CLASSNAME, Filesystem::signal_post_write, [
-			Filesystem::signal_param_path => $this->getHookPath($path),
-		]);
-	}
-
-	/**
-	 * @param string $path
-	 * @param string|resource $data
-	 * @return bool|mixed
-	 * @throws LockedException
-	 */
-	public function file_put_contents($path, $data) {
-		if (is_resource($data)) { //not having to deal with streams in file_put_contents makes life easier
-			$absolutePath = Filesystem::normalizePath($this->getAbsolutePath($path));
-			if (Filesystem::isValidPath($path)
-				&& !Filesystem::isFileBlacklisted($path)
-			) {
-				$path = $this->getRelativePath($absolutePath);
-				if ($path === null) {
-					throw new InvalidPathException("Path $absolutePath is not in the expected root");
-				}
-
-				$this->lockFile($path, ILockingProvider::LOCK_SHARED);
-
-				$exists = $this->file_exists($path);
-				if ($this->shouldEmitHooks($path)) {
-					$run = true;
-					$this->emit_file_hooks_pre($exists, $path, $run);
-					if (!$run) {
-						$this->unlockFile($path, ILockingProvider::LOCK_SHARED);
-						return false;
-					}
-				}
-
-				try {
-					$this->changeLock($path, ILockingProvider::LOCK_EXCLUSIVE);
-				} catch (\Exception $e) {
-					// Release the shared lock before throwing.
-					$this->unlockFile($path, ILockingProvider::LOCK_SHARED);
-					throw $e;
-				}
-
-				/** @var Storage $storage */
-				[$storage, $internalPath] = $this->resolvePath($path);
-				$target = $storage->fopen($internalPath, 'w');
-				if ($target) {
-					[, $result] = Files::streamCopy($data, $target, true);
-					fclose($target);
-					fclose($data);
-
-					$this->writeUpdate($storage, $internalPath);
-
-					$this->changeLock($path, ILockingProvider::LOCK_SHARED);
-
-					if ($this->shouldEmitHooks($path) && $result !== false) {
-						$this->emit_file_hooks_post($exists, $path);
-					}
-					$this->unlockFile($path, ILockingProvider::LOCK_SHARED);
-					return $result;
-				} else {
-					$this->unlockFile($path, ILockingProvider::LOCK_EXCLUSIVE);
-					return false;
-				}
-			} else {
-				return false;
-			}
-		} else {
-			$hooks = $this->file_exists($path) ? ['update', 'write'] : ['create', 'write'];
-			return $this->basicOperation('file_put_contents', $path, $hooks, $data);
-		}
-	}
-
-	/**
-	 * @param string $path
-	 * @return bool|mixed
-	 */
-	public function unlink($path) {
-		if ($path === '' || $path === '/') {
-			// do not allow deleting the root
-			return false;
-		}
-		$postFix = (substr($path, -1) === '/') ? '/' : '';
-		$absolutePath = Filesystem::normalizePath($this->getAbsolutePath($path));
-		$mount = Filesystem::getMountManager()->find($absolutePath . $postFix);
-		if ($mount->getInternalPath($absolutePath) === '') {
-			return $this->removeMount($mount, $absolutePath);
-		}
-		if ($this->is_dir($path)) {
-			$result = $this->basicOperation('rmdir', $path, ['delete']);
-		} else {
-			$result = $this->basicOperation('unlink', $path, ['delete']);
-		}
-		if (!$result && !$this->file_exists($path)) { //clear ghost files from the cache on delete
-			$storage = $mount->getStorage();
-			$internalPath = $mount->getInternalPath($absolutePath);
-			$storage->getUpdater()->remove($internalPath);
-			return true;
-		} else {
-			return $result;
-		}
-	}
-
-	/**
-	 * @param string $directory
-	 * @return bool|mixed
-	 */
-	public function deleteAll($directory) {
-		return $this->rmdir($directory);
-	}
-
-	/**
-	 * Rename/move a file or folder from the source path to target path.
-	 *
-	 * @param string $source source path
-	 * @param string $target target path
-	 * @param array $options
-	 *
-	 * @return bool|mixed
-	 * @throws LockedException
-	 */
-	public function rename($source, $target, array $options = []) {
-		$checkSubMounts = $options['checkSubMounts'] ?? true;
-
-		$absolutePath1 = Filesystem::normalizePath($this->getAbsolutePath($source));
-		$absolutePath2 = Filesystem::normalizePath($this->getAbsolutePath($target));
-
-		if (str_starts_with($absolutePath2, $absolutePath1 . '/')) {
-			throw new ForbiddenException('Moving a folder into a child folder is forbidden', false);
-		}
-
-		/** @var IMountManager $mountManager */
-		$mountManager = \OC::$server->get(IMountManager::class);
-
-		$targetParts = explode('/', $absolutePath2);
-		$targetUser = $targetParts[1] ?? null;
-		$result = false;
-		if (
-			Filesystem::isValidPath($target)
-			&& Filesystem::isValidPath($source)
-			&& !Filesystem::isFileBlacklisted($target)
-		) {
-			$source = $this->getRelativePath($absolutePath1);
-			$target = $this->getRelativePath($absolutePath2);
-			$exists = $this->file_exists($target);
-
-			if ($source == null || $target == null) {
-				return false;
-			}
-
-			try {
-				$this->verifyPath(dirname($target), basename($target));
-			} catch (InvalidPathException) {
-				return false;
-			}
-
-			$this->lockFile($source, ILockingProvider::LOCK_SHARED, true);
-			try {
-				$this->lockFile($target, ILockingProvider::LOCK_SHARED, true);
-
-				$run = true;
-				if ($this->shouldEmitHooks($source) && (Cache\Scanner::isPartialFile($source) && !Cache\Scanner::isPartialFile($target))) {
-					// if it was a rename from a part file to a regular file it was a write and not a rename operation
-					$this->emit_file_hooks_pre($exists, $target, $run);
-				} elseif ($this->shouldEmitHooks($source)) {
-					$sourcePath = $this->getHookPath($source);
-					$targetPath = $this->getHookPath($target);
-					if ($sourcePath !== null && $targetPath !== null) {
-						\OC_Hook::emit(
-							Filesystem::CLASSNAME, Filesystem::signal_rename,
-							[
-								Filesystem::signal_param_oldpath => $sourcePath,
-								Filesystem::signal_param_newpath => $targetPath,
-								Filesystem::signal_param_run => &$run
-							]
-						);
-					}
-				}
-				if ($run) {
-					$manager = Filesystem::getMountManager();
-					$mount1 = $this->getMount($source);
-					$mount2 = $this->getMount($target);
-					$storage1 = $mount1->getStorage();
-					$storage2 = $mount2->getStorage();
-					$internalPath1 = $mount1->getInternalPath($absolutePath1);
-					$internalPath2 = $mount2->getInternalPath($absolutePath2);
-
-					$this->changeLock($source, ILockingProvider::LOCK_EXCLUSIVE, true);
-					try {
-						$this->changeLock($target, ILockingProvider::LOCK_EXCLUSIVE, true);
-
-						if ($checkSubMounts) {
-							$movedMounts = $mountManager->findIn($this->getAbsolutePath($source));
-						} else {
-							$movedMounts = [];
-						}
-
-						if ($internalPath1 === '') {
-							$sourceParentMount = $this->getMount(dirname($source));
-							$movedMounts[] = $mount1;
-							$this->validateMountMove($movedMounts, $sourceParentMount, $mount2, !$this->targetIsNotShared($targetUser, $absolutePath2));
-							/**
-							 * @var \OC\Files\Mount\MountPoint | \OC\Files\Mount\MoveableMount $mount1
-							 */
-							$sourceMountPoint = $mount1->getMountPoint();
-							$result = $mount1->moveMount($absolutePath2);
-							$manager->moveMount($sourceMountPoint, $mount1->getMountPoint());
-
-							// moving a file/folder within the same mount point
-						} elseif ($storage1 === $storage2) {
-							if (count($movedMounts) > 0) {
-								$this->validateMountMove($movedMounts, $mount1, $mount2, !$this->targetIsNotShared($targetUser, $absolutePath2));
-							}
-							if ($storage1) {
-								$result = $storage1->rename($internalPath1, $internalPath2);
-							} else {
-								$result = false;
-							}
-							// moving a file/folder between storages (from $storage1 to $storage2)
-						} else {
-							if (count($movedMounts) > 0) {
-								$this->validateMountMove($movedMounts, $mount1, $mount2, !$this->targetIsNotShared($targetUser, $absolutePath2));
-							}
-							$result = $storage2->moveFromStorage($storage1, $internalPath1, $internalPath2);
-						}
-
-						if ((Cache\Scanner::isPartialFile($source) && !Cache\Scanner::isPartialFile($target)) && $result !== false) {
-							// if it was a rename from a part file to a regular file it was a write and not a rename operation
-							$this->writeUpdate($storage2, $internalPath2);
-						} elseif ($result) {
-							if ($internalPath1 !== '') { // don't do a cache update for moved mounts
-								$this->renameUpdate($storage1, $storage2, $internalPath1, $internalPath2);
-							}
-						}
-					} catch (\Exception $e) {
-						throw $e;
-					} finally {
-						$this->changeLock($source, ILockingProvider::LOCK_SHARED, true);
-						$this->changeLock($target, ILockingProvider::LOCK_SHARED, true);
-					}
-
-					if ((Cache\Scanner::isPartialFile($source) && !Cache\Scanner::isPartialFile($target)) && $result !== false) {
-						if ($this->shouldEmitHooks()) {
-							$this->emit_file_hooks_post($exists, $target);
-						}
-					} elseif ($result) {
-						if ($this->shouldEmitHooks($source) && $this->shouldEmitHooks($target)) {
-							$sourcePath = $this->getHookPath($source);
-							$targetPath = $this->getHookPath($target);
-							if ($sourcePath !== null && $targetPath !== null) {
-								\OC_Hook::emit(
-									Filesystem::CLASSNAME,
-									Filesystem::signal_post_rename,
-									[
-										Filesystem::signal_param_oldpath => $sourcePath,
-										Filesystem::signal_param_newpath => $targetPath,
-									]
-								);
-							}
-						}
-					}
-				}
-			} catch (\Exception $e) {
-				throw $e;
-			} finally {
-				$this->unlockFile($source, ILockingProvider::LOCK_SHARED, true);
-				$this->unlockFile($target, ILockingProvider::LOCK_SHARED, true);
-			}
-		}
-		return $result;
-	}
-
-	/**
-	 * @throws ForbiddenException
-	 */
-	private function validateMountMove(array $mounts, IMountPoint $sourceMount, IMountPoint $targetMount, bool $targetIsShared): void {
-		$targetPath = $this->getRelativePath($targetMount->getMountPoint());
-		if ($targetPath) {
-			$targetPath = trim($targetPath, '/');
-		} else {
-			$targetPath = $targetMount->getMountPoint();
-		}
-
-		$l = \OC::$server->get(IFactory::class)->get('files');
-		foreach ($mounts as $mount) {
-			$sourcePath = $this->getRelativePath($mount->getMountPoint());
-			if ($sourcePath) {
-				$sourcePath = trim($sourcePath, '/');
-			} else {
-				$sourcePath = $mount->getMountPoint();
-			}
-
-			if (!$mount instanceof MoveableMount) {
-				throw new ForbiddenException($l->t('Storage %s cannot be moved', [$sourcePath]), false);
-			}
-
-			if ($targetIsShared) {
-				if ($sourceMount instanceof SharedMount) {
-					throw new ForbiddenException($l->t('Moving a share (%s) into a shared folder is not allowed', [$sourcePath]), false);
-				} else {
-					throw new ForbiddenException($l->t('Moving a storage (%s) into a shared folder is not allowed', [$sourcePath]), false);
-				}
-			}
-
-			if ($sourceMount !== $targetMount) {
-				if ($sourceMount instanceof SharedMount) {
-					if ($targetMount instanceof SharedMount) {
-						throw new ForbiddenException($l->t('Moving a share (%s) into another share (%s) is not allowed', [$sourcePath, $targetPath]), false);
-					} else {
-						throw new ForbiddenException($l->t('Moving a share (%s) into another storage (%s) is not allowed', [$sourcePath, $targetPath]), false);
-					}
-				} else {
-					if ($targetMount instanceof SharedMount) {
-						throw new ForbiddenException($l->t('Moving a storage (%s) into a share (%s) is not allowed', [$sourcePath, $targetPath]), false);
-					} else {
-						throw new ForbiddenException($l->t('Moving a storage (%s) into another storage (%s) is not allowed', [$sourcePath, $targetPath]), false);
-					}
-				}
-			}
-		}
-	}
-
-	/**
-	 * Copy a file/folder from the source path to target path
-	 *
-	 * @param string $source source path
-	 * @param string $target target path
-	 * @param bool $preserveMtime whether to preserve mtime on the copy
-	 *
-	 * @return bool|mixed
-	 */
-	public function copy($source, $target, $preserveMtime = false) {
-		$absolutePath1 = Filesystem::normalizePath($this->getAbsolutePath($source));
-		$absolutePath2 = Filesystem::normalizePath($this->getAbsolutePath($target));
-		$result = false;
-		if (
-			Filesystem::isValidPath($target)
-			&& Filesystem::isValidPath($source)
-			&& !Filesystem::isFileBlacklisted($target)
-		) {
-			$source = $this->getRelativePath($absolutePath1);
-			$target = $this->getRelativePath($absolutePath2);
-
-			if ($source == null || $target == null) {
-				return false;
-			}
-			$run = true;
-
-			$this->lockFile($target, ILockingProvider::LOCK_SHARED);
-			$this->lockFile($source, ILockingProvider::LOCK_SHARED);
-			$lockTypePath1 = ILockingProvider::LOCK_SHARED;
-			$lockTypePath2 = ILockingProvider::LOCK_SHARED;
-
-			try {
-				$exists = $this->file_exists($target);
-				if ($this->shouldEmitHooks($target)) {
-					\OC_Hook::emit(
-						Filesystem::CLASSNAME,
-						Filesystem::signal_copy,
-						[
-							Filesystem::signal_param_oldpath => $this->getHookPath($source),
-							Filesystem::signal_param_newpath => $this->getHookPath($target),
-							Filesystem::signal_param_run => &$run
-						]
-					);
-					$this->emit_file_hooks_pre($exists, $target, $run);
-				}
-				if ($run) {
-					$mount1 = $this->getMount($source);
-					$mount2 = $this->getMount($target);
-					$storage1 = $mount1->getStorage();
-					$internalPath1 = $mount1->getInternalPath($absolutePath1);
-					$storage2 = $mount2->getStorage();
-					$internalPath2 = $mount2->getInternalPath($absolutePath2);
-
-					$this->changeLock($target, ILockingProvider::LOCK_EXCLUSIVE);
-					$lockTypePath2 = ILockingProvider::LOCK_EXCLUSIVE;
-
-					if ($mount1->getMountPoint() == $mount2->getMountPoint()) {
-						if ($storage1) {
-							$result = $storage1->copy($internalPath1, $internalPath2);
-						} else {
-							$result = false;
-						}
-					} else {
-						$result = $storage2->copyFromStorage($storage1, $internalPath1, $internalPath2);
-					}
-
-					if ($result) {
-						$this->copyUpdate($storage1, $storage2, $internalPath1, $internalPath2);
-					}
-
-					$this->changeLock($target, ILockingProvider::LOCK_SHARED);
-					$lockTypePath2 = ILockingProvider::LOCK_SHARED;
-
-					if ($this->shouldEmitHooks($target) && $result !== false) {
-						\OC_Hook::emit(
-							Filesystem::CLASSNAME,
-							Filesystem::signal_post_copy,
-							[
-								Filesystem::signal_param_oldpath => $this->getHookPath($source),
-								Filesystem::signal_param_newpath => $this->getHookPath($target)
-							]
-						);
-						$this->emit_file_hooks_post($exists, $target);
-					}
-				}
-			} catch (\Exception $e) {
-				$this->unlockFile($target, $lockTypePath2);
-				$this->unlockFile($source, $lockTypePath1);
-				throw $e;
-			}
-
-			$this->unlockFile($target, $lockTypePath2);
-			$this->unlockFile($source, $lockTypePath1);
-		}
-		return $result;
-	}
-
-	/**
-	 * @param string $path
-	 * @param string $mode 'r' or 'w'
-	 * @return resource|false
-	 * @throws LockedException
-	 */
-	public function fopen($path, $mode) {
-		$mode = str_replace('b', '', $mode); // the binary flag is a windows only feature which we do not support
-		$hooks = [];
-		switch ($mode) {
-			case 'r':
-				$hooks[] = 'read';
-				break;
-			case 'r+':
-			case 'w+':
-			case 'x+':
-			case 'a+':
-				$hooks[] = 'read';
-				$hooks[] = 'write';
-				break;
-			case 'w':
-			case 'x':
-			case 'a':
-				$hooks[] = 'write';
-				break;
-			default:
-				$this->logger->error('invalid mode (' . $mode . ') for ' . $path, ['app' => 'core']);
-		}
-
-		if ($mode !== 'r' && $mode !== 'w') {
-			$this->logger->info('Trying to open a file with a mode other than "r" or "w" can cause severe performance issues with some backends', ['app' => 'core']);
-		}
-
-		$handle = $this->basicOperation('fopen', $path, $hooks, $mode);
-		if (!is_resource($handle) && $mode === 'r') {
-			// trying to read a file that isn't on disk, check if the cache is out of sync and rescan if needed
-			$mount = $this->getMount($path);
-			$internalPath = $mount->getInternalPath($this->getAbsolutePath($path));
-			$storage = $mount->getStorage();
-			if ($storage->getCache()->inCache($internalPath) && !$storage->file_exists($path)) {
-				$this->writeUpdate($storage, $internalPath);
-			}
-		}
-		return $handle;
-	}
-
-	/**
-	 * @param string $path
-	 * @throws InvalidPathException
-	 */
-	public function toTmpFile($path): string|false {
-		$this->assertPathLength($path);
-		if (Filesystem::isValidPath($path)) {
-			$source = $this->fopen($path, 'r');
-			if ($source) {
-				$extension = pathinfo($path, PATHINFO_EXTENSION);
-				$tmpFile = \OC::$server->getTempManager()->getTemporaryFile($extension);
-				file_put_contents($tmpFile, $source);
-				return $tmpFile;
-			} else {
-				return false;
-			}
-		} else {
-			return false;
-		}
-	}
-
-	/**
-	 * @param string $tmpFile
-	 * @param string $path
-	 * @return bool|mixed
-	 * @throws InvalidPathException
-	 */
-	public function fromTmpFile($tmpFile, $path) {
-		$this->assertPathLength($path);
-		if (Filesystem::isValidPath($path)) {
-			// Get directory that the file is going into
-			$filePath = dirname($path);
-
-			// Create the directories if any
-			if (!$this->file_exists($filePath)) {
-				$result = $this->createParentDirectories($filePath);
-				if ($result === false) {
-					return false;
-				}
-			}
-
-			$source = fopen($tmpFile, 'r');
-			if ($source) {
-				$result = $this->file_put_contents($path, $source);
-				/**
-				 * $this->file_put_contents() might have already closed
-				 * the resource, so we check it, before trying to close it
-				 * to avoid messages in the error log.
-				 * @psalm-suppress RedundantCondition false-positive
-				 */
-				if (is_resource($source)) {
-					fclose($source);
-				}
-				unlink($tmpFile);
-				return $result;
-			} else {
-				return false;
-			}
-		} else {
-			return false;
-		}
-	}
-
-
-	/**
-	 * @param string $path
-	 * @return mixed
-	 * @throws InvalidPathException
-	 */
-	public function getMimeType($path) {
-		$this->assertPathLength($path);
-		return $this->basicOperation('getMimeType', $path);
-	}
-
-	/**
-	 * @param string $type
-	 * @param string $path
-	 * @param bool $raw
-	 */
-	public function hash($type, $path, $raw = false): string|bool {
-		$postFix = (substr($path, -1) === '/') ? '/' : '';
-		$absolutePath = Filesystem::normalizePath($this->getAbsolutePath($path));
-		if (Filesystem::isValidPath($path)) {
-			$path = $this->getRelativePath($absolutePath);
-			if ($path == null) {
-				return false;
-			}
-			if ($this->shouldEmitHooks($path)) {
-				\OC_Hook::emit(
-					Filesystem::CLASSNAME,
-					Filesystem::signal_read,
-					[Filesystem::signal_param_path => $this->getHookPath($path)]
-				);
-			}
-			/** @var Storage|null $storage */
-			[$storage, $internalPath] = Filesystem::resolvePath($absolutePath . $postFix);
-			if ($storage) {
-				return $storage->hash($type, $internalPath, $raw);
-			}
-		}
-		return false;
-	}
-
-	/**
-	 * @param string $path
-	 * @return mixed
-	 * @throws InvalidPathException
-	 */
-	public function free_space($path = '/') {
-		$this->assertPathLength($path);
-		$result = $this->basicOperation('free_space', $path);
-		if ($result === null) {
-			throw new InvalidPathException();
-		}
-		return $result;
-	}
-
-	/**
-	 * abstraction layer for basic filesystem functions: wrapper for \OC\Files\Storage\Storage
-	 *
-	 * @param mixed $extraParam (optional)
-	 * @return mixed
-	 * @throws LockedException
-	 *
-	 * This method takes requests for basic filesystem functions (e.g. reading & writing
-	 * files), processes hooks and proxies, sanitises paths, and finally passes them on to
-	 * \OC\Files\Storage\Storage for delegation to a storage backend for execution
-	 */
-	private function basicOperation(string $operation, string $path, array $hooks = [], $extraParam = null) {
-		$postFix = (substr($path, -1) === '/') ? '/' : '';
-		$absolutePath = Filesystem::normalizePath($this->getAbsolutePath($path));
-		if (Filesystem::isValidPath($path)
-			&& !Filesystem::isFileBlacklisted($path)
-		) {
-			$path = $this->getRelativePath($absolutePath);
-			if ($path == null) {
-				return false;
-			}
-
-			if (in_array('write', $hooks) || in_array('delete', $hooks) || in_array('read', $hooks)) {
-				// always a shared lock during pre-hooks so the hook can read the file
-				$this->lockFile($path, ILockingProvider::LOCK_SHARED);
-			}
-
-			$run = $this->runHooks($hooks, $path);
-			[$storage, $internalPath] = Filesystem::resolvePath($absolutePath . $postFix);
-			if ($run && $storage) {
-				/** @var Storage $storage */
-				if (in_array('write', $hooks) || in_array('delete', $hooks)) {
-					try {
-						$this->changeLock($path, ILockingProvider::LOCK_EXCLUSIVE);
-					} catch (LockedException $e) {
-						// release the shared lock we acquired before quitting
-						$this->unlockFile($path, ILockingProvider::LOCK_SHARED);
-						throw $e;
-					}
-				}
-				try {
-					if (!is_null($extraParam)) {
-						$result = $storage->$operation($internalPath, $extraParam);
-					} else {
-						$result = $storage->$operation($internalPath);
-					}
-				} catch (\Exception $e) {
-					if (in_array('write', $hooks) || in_array('delete', $hooks)) {
-						$this->unlockFile($path, ILockingProvider::LOCK_EXCLUSIVE);
-					} elseif (in_array('read', $hooks)) {
-						$this->unlockFile($path, ILockingProvider::LOCK_SHARED);
-					}
-					throw $e;
-				}
-
-				if ($result !== false && in_array('delete', $hooks)) {
-					$this->removeUpdate($storage, $internalPath);
-				}
-				if ($result !== false && in_array('write', $hooks, true) && $operation !== 'fopen' && $operation !== 'touch') {
-					$isCreateOperation = $operation === 'mkdir' || ($operation === 'file_put_contents' && in_array('create', $hooks, true));
-					$sizeDifference = $operation === 'mkdir' ? 0 : $result;
-					$this->writeUpdate($storage, $internalPath, null, $isCreateOperation ? $sizeDifference : null);
-				}
-				if ($result !== false && in_array('touch', $hooks)) {
-					$this->writeUpdate($storage, $internalPath, $extraParam, 0);
-				}
-
-				if ((in_array('write', $hooks) || in_array('delete', $hooks)) && ($operation !== 'fopen' || $result === false)) {
-					$this->changeLock($path, ILockingProvider::LOCK_SHARED);
-				}
-
-				$unlockLater = false;
-				if ($this->lockingEnabled && $operation === 'fopen' && is_resource($result)) {
-					$unlockLater = true;
-					// make sure our unlocking callback will still be called if connection is aborted
-					ignore_user_abort(true);
-					$result = CallbackWrapper::wrap($result, null, null, function () use ($hooks, $path) {
-						if (in_array('write', $hooks)) {
-							$this->unlockFile($path, ILockingProvider::LOCK_EXCLUSIVE);
-						} elseif (in_array('read', $hooks)) {
-							$this->unlockFile($path, ILockingProvider::LOCK_SHARED);
-						}
-					});
-				}
-
-				if ($this->shouldEmitHooks($path) && $result !== false) {
-					if ($operation != 'fopen') { //no post hooks for fopen, the file stream is still open
-						$this->runHooks($hooks, $path, true);
-					}
-				}
-
-				if (!$unlockLater
-					&& (in_array('write', $hooks) || in_array('delete', $hooks) || in_array('read', $hooks))
-				) {
-					$this->unlockFile($path, ILockingProvider::LOCK_SHARED);
-				}
-				return $result;
-			} else {
-				$this->unlockFile($path, ILockingProvider::LOCK_SHARED);
-			}
-		}
-		return null;
-	}
-
-	/**
-	 * get the path relative to the default root for hook usage
-	 *
-	 * @param string $path
-	 * @return ?string
-	 */
-	private function getHookPath($path): ?string {
-		$view = Filesystem::getView();
-		if (!$view) {
-			return $path;
-		}
-		return $view->getRelativePath($this->getAbsolutePath($path));
-	}
-
-	private function shouldEmitHooks(string $path = ''): bool {
-		if ($path && Cache\Scanner::isPartialFile($path)) {
-			return false;
-		}
-		if (!Filesystem::$loaded) {
-			return false;
-		}
-		$defaultRoot = Filesystem::getRoot();
-		if ($defaultRoot === null) {
-			return false;
-		}
-		if ($this->fakeRoot === $defaultRoot) {
-			return true;
-		}
-		$fullPath = $this->getAbsolutePath($path);
-
-		if ($fullPath === $defaultRoot) {
-			return true;
-		}
-
-		return (strlen($fullPath) > strlen($defaultRoot)) && (substr($fullPath, 0, strlen($defaultRoot) + 1) === $defaultRoot . '/');
-	}
-
-	/**
-	 * @param string[] $hooks
-	 * @param string $path
-	 * @param bool $post
-	 * @return bool
-	 */
-	private function runHooks($hooks, $path, $post = false) {
-		$relativePath = $path;
-		$path = $this->getHookPath($path);
-		$prefix = $post ? 'post_' : '';
-		$run = true;
-		if ($this->shouldEmitHooks($relativePath)) {
-			foreach ($hooks as $hook) {
-				if ($hook != 'read') {
-					\OC_Hook::emit(
-						Filesystem::CLASSNAME,
-						$prefix . $hook,
-						[
-							Filesystem::signal_param_run => &$run,
-							Filesystem::signal_param_path => $path
-						]
-					);
-				} elseif (!$post) {
-					\OC_Hook::emit(
-						Filesystem::CLASSNAME,
-						$prefix . $hook,
-						[
-							Filesystem::signal_param_path => $path
-						]
-					);
-				}
-			}
-		}
-		return $run;
-	}
-
-	/**
-	 * check if a file or folder has been updated since $time
-	 *
-	 * @param string $path
-	 * @param int $time
-	 * @return bool
-	 */
-	public function hasUpdated($path, $time) {
-		return $this->basicOperation('hasUpdated', $path, [], $time);
-	}
-
-	/**
-	 * @param string $ownerId
-	 * @return IUser
-	 */
-	private function getUserObjectForOwner(string $ownerId) {
-		return new LazyUser($ownerId, $this->userManager);
-	}
-
-	/**
-	 * Get file info from cache
-	 *
-	 * If the file is not in cached it will be scanned
-	 * If the file has changed on storage the cache will be updated
-	 *
-	 * @param Storage $storage
-	 * @param string $internalPath
-	 * @param string $relativePath
-	 * @return ICacheEntry|bool
-	 */
-	private function getCacheEntry($storage, $internalPath, $relativePath) {
-		$cache = $storage->getCache($internalPath);
-		$data = $cache->get($internalPath);
-		$watcher = $storage->getWatcher($internalPath);
-
-		try {
-			// if the file is not in the cache or needs to be updated, trigger the scanner and reload the data
-			if (!$data || (isset($data['size']) && $data['size'] === -1)) {
-				if (!$storage->file_exists($internalPath)) {
-					return false;
-				}
-				// don't need to get a lock here since the scanner does it's own locking
-				$scanner = $storage->getScanner($internalPath);
-				$scanner->scan($internalPath, Cache\Scanner::SCAN_SHALLOW);
-				$data = $cache->get($internalPath);
-			} elseif (!Cache\Scanner::isPartialFile($internalPath) && $watcher->needsUpdate($internalPath, $data)) {
-				$this->lockFile($relativePath, ILockingProvider::LOCK_SHARED);
-				$watcher->update($internalPath, $data);
-				$storage->getPropagator()->propagateChange($internalPath, time());
-				$data = $cache->get($internalPath);
-				$this->unlockFile($relativePath, ILockingProvider::LOCK_SHARED);
-			}
-		} catch (LockedException $e) {
-			// if the file is locked we just use the old cache info
-		}
-
-		return $data;
-	}
-
-	/**
-	 * get the filesystem info
-	 *
-	 * @param string $path
-	 * @param bool|string $includeMountPoints true to add mountpoint sizes,
-	 *                                        'ext' to add only ext storage mount point sizes. Defaults to true.
-	 * @return \OC\Files\FileInfo|false False if file does not exist
-	 */
-	public function getFileInfo($path, $includeMountPoints = true) {
-		$this->assertPathLength($path);
-		if (!Filesystem::isValidPath($path)) {
-			return false;
-		}
-		$relativePath = $path;
-		$path = Filesystem::normalizePath($this->fakeRoot . '/' . $path);
-
-		$mount = Filesystem::getMountManager()->find($path);
-		$storage = $mount->getStorage();
-		$internalPath = $mount->getInternalPath($path);
-		if ($storage) {
-			$data = $this->getCacheEntry($storage, $internalPath, $relativePath);
-
-			if (!$data instanceof ICacheEntry) {
-				if (Cache\Scanner::isPartialFile($relativePath)) {
-					return $this->getPartFileInfo($relativePath);
-				}
-
-				return false;
-			}
-
-			if ($mount instanceof MoveableMount && $internalPath === '') {
-				$data['permissions'] |= \OCP\Constants::PERMISSION_DELETE;
-			}
-			if ($internalPath === '' && $data['name']) {
-				$data['name'] = basename($path);
-			}
-
-			$ownerId = $storage->getOwner($internalPath);
-			$owner = null;
-			if ($ownerId !== false) {
-				// ownerId might be null if files are accessed with an access token without file system access
-				$owner = $this->getUserObjectForOwner($ownerId);
-			}
-			$info = new FileInfo($path, $storage, $internalPath, $data, $mount, $owner);
-
-			if (isset($data['fileid'])) {
-				if ($includeMountPoints && $data['mimetype'] === 'httpd/unix-directory') {
-					//add the sizes of other mount points to the folder
-					$extOnly = ($includeMountPoints === 'ext');
-					$this->addSubMounts($info, $extOnly);
-				}
-			}
-
-			return $info;
-		} else {
-			$this->logger->warning('Storage not valid for mountpoint: ' . $mount->getMountPoint(), ['app' => 'core']);
-		}
-
-		return false;
-	}
-
-	/**
-	 * Extend a FileInfo that was previously requested with `$includeMountPoints = false` to include the sub mounts
-	 */
-	public function addSubMounts(FileInfo $info, $extOnly = false): void {
-		$mounts = Filesystem::getMountManager()->findIn($info->getPath());
-		$info->setSubMounts(array_filter($mounts, function (IMountPoint $mount) use ($extOnly) {
-			return !($extOnly && $mount instanceof SharedMount);
-		}));
-	}
-
-	/**
-	 * get the content of a directory
-	 *
-	 * @param string $directory path under datadirectory
-	 * @param string $mimetype_filter limit returned content to this mimetype or mimepart
-	 * @return FileInfo[]
-	 */
-	public function getDirectoryContent($directory, $mimetype_filter = '', ?\OCP\Files\FileInfo $directoryInfo = null) {
-		$this->assertPathLength($directory);
-		if (!Filesystem::isValidPath($directory)) {
-			return [];
-		}
-
-		$path = $this->getAbsolutePath($directory);
-		$path = Filesystem::normalizePath($path);
-		$mount = $this->getMount($directory);
-		$storage = $mount->getStorage();
-		$internalPath = $mount->getInternalPath($path);
-		if (!$storage) {
-			return [];
-		}
-
-		$cache = $storage->getCache($internalPath);
-		$user = \OC_User::getUser();
-
-		if (!$directoryInfo) {
-			$data = $this->getCacheEntry($storage, $internalPath, $directory);
-			if (!$data instanceof ICacheEntry || !isset($data['fileid'])) {
-				return [];
-			}
-		} else {
-			$data = $directoryInfo;
-		}
-
-		if (!($data->getPermissions() & Constants::PERMISSION_READ)) {
-			return [];
-		}
-
-		$folderId = $data->getId();
-		$contents = $cache->getFolderContentsById($folderId); //TODO: mimetype_filter
-
-		$sharingDisabled = \OCP\Util::isSharingDisabledForUser();
-
-		$fileNames = array_map(function (ICacheEntry $content) {
-			return $content->getName();
-		}, $contents);
-		/**
-		 * @var \OC\Files\FileInfo[] $fileInfos
-		 */
-		$fileInfos = array_map(function (ICacheEntry $content) use ($path, $storage, $mount, $sharingDisabled) {
-			if ($sharingDisabled) {
-				$content['permissions'] = $content['permissions'] & ~\OCP\Constants::PERMISSION_SHARE;
-			}
-			$ownerId = $storage->getOwner($content['path']);
-			if ($ownerId !== false) {
-				$owner = $this->getUserObjectForOwner($ownerId);
-			} else {
-				$owner = null;
-			}
-			return new FileInfo($path . '/' . $content['name'], $storage, $content['path'], $content, $mount, $owner);
-		}, $contents);
-		$files = array_combine($fileNames, $fileInfos);
-
-		//add a folder for any mountpoint in this directory and add the sizes of other mountpoints to the folders
-		$mounts = Filesystem::getMountManager()->findIn($path);
-
-		// make sure nested mounts are sorted after their parent mounts
-		// otherwise doesn't propagate the etag across storage boundaries correctly
-		usort($mounts, function (IMountPoint $a, IMountPoint $b) {
-			return $a->getMountPoint() <=> $b->getMountPoint();
-		});
-
-		$dirLength = strlen($path);
-		foreach ($mounts as $mount) {
-			$mountPoint = $mount->getMountPoint();
-			$subStorage = $mount->getStorage();
-			if ($subStorage) {
-				$subCache = $subStorage->getCache('');
-
-				$rootEntry = $subCache->get('');
-				if (!$rootEntry) {
-					$subScanner = $subStorage->getScanner();
-					try {
-						$subScanner->scanFile('');
-					} catch (\OCP\Files\StorageNotAvailableException $e) {
-						continue;
-					} catch (\OCP\Files\StorageInvalidException $e) {
-						continue;
-					} catch (\Exception $e) {
-						// sometimes when the storage is not available it can be any exception
-						$this->logger->error('Exception while scanning storage "' . $subStorage->getId() . '"', [
-							'exception' => $e,
-							'app' => 'core',
-						]);
-						continue;
-					}
-					$rootEntry = $subCache->get('');
-				}
-
-				if ($rootEntry && ($rootEntry->getPermissions() & Constants::PERMISSION_READ)) {
-					$relativePath = trim(substr($mountPoint, $dirLength), '/');
-					if ($pos = strpos($relativePath, '/')) {
-						//mountpoint inside subfolder add size to the correct folder
-						$entryName = substr($relativePath, 0, $pos);
-
-						// Create parent folders if the mountpoint is inside a subfolder that doesn't exist yet
-						if (!isset($files[$entryName])) {
-							try {
-								[$storage, ] = $this->resolvePath($path . '/' . $entryName);
-								// make sure we can create the mountpoint folder, even if the user has a quota of 0
-								if ($storage->instanceOfStorage(Quota::class)) {
-									$storage->enableQuota(false);
-								}
-
-								if ($this->mkdir($path . '/' . $entryName) !== false) {
-									$info = $this->getFileInfo($path . '/' . $entryName);
-									if ($info !== false) {
-										$files[$entryName] = $info;
-									}
-								}
-
-								if ($storage->instanceOfStorage(Quota::class)) {
-									$storage->enableQuota(true);
-								}
-							} catch (\Exception $e) {
-								// Creating the parent folder might not be possible, for example due to a lack of permissions.
-								$this->logger->debug('Failed to create non-existent parent', ['exception' => $e, 'path' => $path . '/' . $entryName]);
-							}
-						}
-
-						if (isset($files[$entryName])) {
-							$files[$entryName]->addSubEntry($rootEntry, $mountPoint);
-						}
-					} else { //mountpoint in this folder, add an entry for it
-						$rootEntry['name'] = $relativePath;
-						$rootEntry['type'] = $rootEntry['mimetype'] === 'httpd/unix-directory' ? 'dir' : 'file';
-						$permissions = $rootEntry['permissions'];
-						// do not allow renaming/deleting the mount point if they are not shared files/folders
-						// for shared files/folders we use the permissions given by the owner
-						if ($mount instanceof MoveableMount) {
-							$rootEntry['permissions'] = $permissions | \OCP\Constants::PERMISSION_UPDATE | \OCP\Constants::PERMISSION_DELETE;
-						} else {
-							$rootEntry['permissions'] = $permissions & (\OCP\Constants::PERMISSION_ALL - (\OCP\Constants::PERMISSION_UPDATE | \OCP\Constants::PERMISSION_DELETE));
-						}
-
-						$rootEntry['path'] = substr(Filesystem::normalizePath($path . '/' . $rootEntry['name']), strlen($user) + 2); // full path without /$user/
-
-						// if sharing was disabled for the user we remove the share permissions
-						if ($sharingDisabled) {
-							$rootEntry['permissions'] = $rootEntry['permissions'] & ~\OCP\Constants::PERMISSION_SHARE;
-						}
-
-						$ownerId = $subStorage->getOwner('');
-						if ($ownerId !== false) {
-							$owner = $this->getUserObjectForOwner($ownerId);
-						} else {
-							$owner = null;
-						}
-						$files[$rootEntry->getName()] = new FileInfo($path . '/' . $rootEntry['name'], $subStorage, '', $rootEntry, $mount, $owner);
-					}
-				}
-			}
-		}
-
-		if ($mimetype_filter) {
-			$files = array_filter($files, function (FileInfo $file) use ($mimetype_filter) {
-				if (strpos($mimetype_filter, '/')) {
-					return $file->getMimetype() === $mimetype_filter;
-				} else {
-					return $file->getMimePart() === $mimetype_filter;
-				}
-			});
-		}
-
-		return array_values($files);
-	}
-
-	/**
-	 * change file metadata
-	 *
-	 * @param string $path
-	 * @param array|\OCP\Files\FileInfo $data
-	 * @return int
-	 *
-	 * returns the fileid of the updated file
-	 */
-	public function putFileInfo($path, $data) {
-		$this->assertPathLength($path);
-		if ($data instanceof FileInfo) {
-			$data = $data->getData();
-		}
-		$path = Filesystem::normalizePath($this->fakeRoot . '/' . $path);
-		/**
-		 * @var Storage $storage
-		 * @var string $internalPath
-		 */
-		[$storage, $internalPath] = Filesystem::resolvePath($path);
-		if ($storage) {
-			$cache = $storage->getCache($path);
-
-			if (!$cache->inCache($internalPath)) {
-				$scanner = $storage->getScanner($internalPath);
-				$scanner->scan($internalPath, Cache\Scanner::SCAN_SHALLOW);
-			}
-
-			return $cache->put($internalPath, $data);
-		} else {
-			return -1;
-		}
-	}
-
-	/**
-	 * search for files with the name matching $query
-	 *
-	 * @param string $query
-	 * @return FileInfo[]
-	 */
-	public function search($query) {
-		return $this->searchCommon('search', ['%' . $query . '%']);
-	}
-
-	/**
-	 * search for files with the name matching $query
-	 *
-	 * @param string $query
-	 * @return FileInfo[]
-	 */
-	public function searchRaw($query) {
-		return $this->searchCommon('search', [$query]);
-	}
-
-	/**
-	 * search for files by mimetype
-	 *
-	 * @param string $mimetype
-	 * @return FileInfo[]
-	 */
-	public function searchByMime($mimetype) {
-		return $this->searchCommon('searchByMime', [$mimetype]);
-	}
-
-	/**
-	 * search for files by tag
-	 *
-	 * @param string|int $tag name or tag id
-	 * @param string $userId owner of the tags
-	 * @return FileInfo[]
-	 */
-	public function searchByTag($tag, $userId) {
-		return $this->searchCommon('searchByTag', [$tag, $userId]);
-	}
-
-	/**
-	 * @param string $method cache method
-	 * @param array $args
-	 * @return FileInfo[]
-	 */
-	private function searchCommon($method, $args) {
-		$files = [];
-		$rootLength = strlen($this->fakeRoot);
-
-		$mount = $this->getMount('');
-		$mountPoint = $mount->getMountPoint();
-		$storage = $mount->getStorage();
-		$userManager = \OC::$server->getUserManager();
-		if ($storage) {
-			$cache = $storage->getCache('');
-
-			$results = call_user_func_array([$cache, $method], $args);
-			foreach ($results as $result) {
-				if (substr($mountPoint . $result['path'], 0, $rootLength + 1) === $this->fakeRoot . '/') {
-					$internalPath = $result['path'];
-					$path = $mountPoint . $result['path'];
-					$result['path'] = substr($mountPoint . $result['path'], $rootLength);
-					$ownerId = $storage->getOwner($internalPath);
-					if ($ownerId !== false) {
-						$owner = $userManager->get($ownerId);
-					} else {
-						$owner = null;
-					}
-					$files[] = new FileInfo($path, $storage, $internalPath, $result, $mount, $owner);
-				}
-			}
-
-			$mounts = Filesystem::getMountManager()->findIn($this->fakeRoot);
-			foreach ($mounts as $mount) {
-				$mountPoint = $mount->getMountPoint();
-				$storage = $mount->getStorage();
-				if ($storage) {
-					$cache = $storage->getCache('');
-
-					$relativeMountPoint = substr($mountPoint, $rootLength);
-					$results = call_user_func_array([$cache, $method], $args);
-					if ($results) {
-						foreach ($results as $result) {
-							$internalPath = $result['path'];
-							$result['path'] = rtrim($relativeMountPoint . $result['path'], '/');
-							$path = rtrim($mountPoint . $internalPath, '/');
-							$ownerId = $storage->getOwner($internalPath);
-							if ($ownerId !== false) {
-								$owner = $userManager->get($ownerId);
-							} else {
-								$owner = null;
-							}
-							$files[] = new FileInfo($path, $storage, $internalPath, $result, $mount, $owner);
-						}
-					}
-				}
-			}
-		}
-		return $files;
-	}
-
-	/**
-	 * Get the owner for a file or folder
-	 *
-	 * @throws NotFoundException
-	 */
-	public function getOwner(string $path): string {
-		$info = $this->getFileInfo($path);
-		if (!$info) {
-			throw new NotFoundException($path . ' not found while trying to get owner');
-		}
-
-		if ($info->getOwner() === null) {
-			throw new NotFoundException($path . ' has no owner');
-		}
-
-		return $info->getOwner()->getUID();
-	}
-
-	/**
-	 * get the ETag for a file or folder
-	 *
-	 * @param string $path
-	 * @return string|false
-	 */
-	public function getETag($path) {
-		[$storage, $internalPath] = $this->resolvePath($path);
-		if ($storage) {
-			return $storage->getETag($internalPath);
-		} else {
-			return false;
-		}
-	}
-
-	/**
-	 * Get the path of a file by id, relative to the view
-	 *
-	 * Note that the resulting path is not guaranteed to be unique for the id, multiple paths can point to the same file
-	 *
-	 * @param int $id
-	 * @param int|null $storageId
-	 * @return string
-	 * @throws NotFoundException
-	 */
-	public function getPath($id, ?int $storageId = null): string {
-		$id = (int)$id;
-		$rootFolder = Server::get(Files\IRootFolder::class);
-
-		$node = $rootFolder->getFirstNodeByIdInPath($id, $this->getRoot());
-		if ($node) {
-			if ($storageId === null || $storageId === $node->getStorage()->getCache()->getNumericStorageId()) {
-				return $this->getRelativePath($node->getPath()) ?? '';
-			}
-		} else {
-			throw new NotFoundException(sprintf('File with id "%s" has not been found.', $id));
-		}
-
-		foreach ($rootFolder->getByIdInPath($id, $this->getRoot()) as $node) {
-			if ($storageId === $node->getStorage()->getCache()->getNumericStorageId()) {
-				return $this->getRelativePath($node->getPath()) ?? '';
-			}
-		}
-
-		throw new NotFoundException(sprintf('File with id "%s" has not been found.', $id));
-	}
-
-	/**
-	 * @param string $path
-	 * @throws InvalidPathException
-	 */
-	private function assertPathLength($path): void {
-		$maxLen = min(PHP_MAXPATHLEN, 4000);
-		// Check for the string length - performed using isset() instead of strlen()
-		// because isset() is about 5x-40x faster.
-		if (isset($path[$maxLen])) {
-			$pathLen = strlen($path);
-			throw new InvalidPathException("Path length($pathLen) exceeds max path length($maxLen): $path");
-		}
-	}
-
-	/**
-	 * check if it is allowed to move a mount point to a given target.
-	 * It is not allowed to move a mount point into a different mount point or
-	 * into an already shared folder
-	 */
-	private function targetIsNotShared(string $user, string $targetPath): bool {
-		$providers = [
-			IShare::TYPE_USER,
-			IShare::TYPE_GROUP,
-			IShare::TYPE_EMAIL,
-			IShare::TYPE_CIRCLE,
-			IShare::TYPE_ROOM,
-			IShare::TYPE_DECK,
-			IShare::TYPE_SCIENCEMESH
-		];
-		$shareManager = Server::get(IManager::class);
-		/** @var IShare[] $shares */
-		$shares = array_merge(...array_map(function (int $type) use ($shareManager, $user) {
-			return $shareManager->getSharesBy($user, $type);
-		}, $providers));
-
-		foreach ($shares as $share) {
-			try {
-				$sharedPath = $share->getNode()->getPath();
-			} catch (NotFoundException $e) {
-				// node is not found, ignoring
-				$this->logger->debug(
-					'Could not find the node linked to a share',
-					['app' => 'files', 'exception' => $e]);
-				continue;
-			}
-			if ($targetPath === $sharedPath || str_starts_with($targetPath, $sharedPath . '/')) {
-				$this->logger->debug(
-					'It is not allowed to move one mount point into a shared folder',
-					['app' => 'files']);
-				return false;
-			}
-		}
-
-		return true;
-	}
-
-	/**
-	 * Get a fileinfo object for files that are ignored in the cache (part files)
-	 */
-	private function getPartFileInfo(string $path): \OC\Files\FileInfo {
-		$mount = $this->getMount($path);
-		$storage = $mount->getStorage();
-		$internalPath = $mount->getInternalPath($this->getAbsolutePath($path));
-		$ownerId = $storage->getOwner($internalPath);
-		if ($ownerId !== false) {
-			$owner = Server::get(IUserManager::class)->get($ownerId);
-		} else {
-			$owner = null;
-		}
-		return new FileInfo(
-			$this->getAbsolutePath($path),
-			$storage,
-			$internalPath,
-			[
-				'fileid' => null,
-				'mimetype' => $storage->getMimeType($internalPath),
-				'name' => basename($path),
-				'etag' => null,
-				'size' => $storage->filesize($internalPath),
-				'mtime' => $storage->filemtime($internalPath),
-				'encrypted' => false,
-				'permissions' => \OCP\Constants::PERMISSION_ALL
-			],
-			$mount,
-			$owner
-		);
-	}
-
-	/**
-	 * @param string $path
-	 * @param string $fileName
-	 * @param bool $readonly Check only if the path is allowed for read-only access
-	 * @throws InvalidPathException
-	 */
-	public function verifyPath($path, $fileName, $readonly = false): void {
-		// All of the view's functions disallow '..' in the path so we can short cut if the path is invalid
-		if (!Filesystem::isValidPath($path ?: '/')) {
-			$l = \OCP\Util::getL10N('lib');
-			throw new InvalidPathException($l->t('Path contains invalid segments'));
-		}
-
-		// Short cut for read-only validation
-		if ($readonly) {
-			$validator = Server::get(FilenameValidator::class);
-			if ($validator->isForbidden($fileName)) {
-				$l = \OCP\Util::getL10N('lib');
-				throw new InvalidPathException($l->t('Filename is a reserved word'));
-			}
-			return;
-		}
-
-		try {
-			/** @type \OCP\Files\Storage $storage */
-			[$storage, $internalPath] = $this->resolvePath($path);
-			$storage->verifyPath($internalPath, $fileName);
-		} catch (ReservedWordException $ex) {
-			$l = \OCP\Util::getL10N('lib');
-			throw new InvalidPathException($ex->getMessage() ?: $l->t('Filename is a reserved word'));
-		} catch (InvalidCharacterInPathException $ex) {
-			$l = \OCP\Util::getL10N('lib');
-			throw new InvalidPathException($ex->getMessage() ?: $l->t('Filename contains at least one invalid character'));
-		} catch (FileNameTooLongException $ex) {
-			$l = \OCP\Util::getL10N('lib');
-			throw new InvalidPathException($l->t('Filename is too long'));
-		} catch (InvalidDirectoryException $ex) {
-			$l = \OCP\Util::getL10N('lib');
-			throw new InvalidPathException($l->t('Dot files are not allowed'));
-		} catch (EmptyFileNameException $ex) {
-			$l = \OCP\Util::getL10N('lib');
-			throw new InvalidPathException($l->t('Empty filename is not allowed'));
-		}
-	}
-
-	/**
-	 * get all parent folders of $path
-	 *
-	 * @param string $path
-	 * @return string[]
-	 */
-	private function getParents($path) {
-		$path = trim($path, '/');
-		if (!$path) {
-			return [];
-		}
-
-		$parts = explode('/', $path);
-
-		// remove the single file
-		array_pop($parts);
-		$result = ['/'];
-		$resultPath = '';
-		foreach ($parts as $part) {
-			if ($part) {
-				$resultPath .= '/' . $part;
-				$result[] = $resultPath;
-			}
-		}
-		return $result;
-	}
-
-	/**
-	 * Returns the mount point for which to lock
-	 *
-	 * @param string $absolutePath absolute path
-	 * @param bool $useParentMount true to return parent mount instead of whatever
-	 *                             is mounted directly on the given path, false otherwise
-	 * @return IMountPoint mount point for which to apply locks
-	 */
-	private function getMountForLock(string $absolutePath, bool $useParentMount = false): IMountPoint {
-		$mount = Filesystem::getMountManager()->find($absolutePath);
-
-		if ($useParentMount) {
-			// find out if something is mounted directly on the path
-			$internalPath = $mount->getInternalPath($absolutePath);
-			if ($internalPath === '') {
-				// resolve the parent mount instead
-				$mount = Filesystem::getMountManager()->find(dirname($absolutePath));
-			}
-		}
-
-		return $mount;
-	}
-
-	/**
-	 * Lock the given path
-	 *
-	 * @param string $path the path of the file to lock, relative to the view
-	 * @param int $type \OCP\Lock\ILockingProvider::LOCK_SHARED or \OCP\Lock\ILockingProvider::LOCK_EXCLUSIVE
-	 * @param bool $lockMountPoint true to lock the mount point, false to lock the attached mount/storage
-	 *
-	 * @return bool False if the path is excluded from locking, true otherwise
-	 * @throws LockedException if the path is already locked
-	 */
-	private function lockPath($path, $type, $lockMountPoint = false) {
-		$absolutePath = $this->getAbsolutePath($path);
-		$absolutePath = Filesystem::normalizePath($absolutePath);
-		if (!$this->shouldLockFile($absolutePath)) {
-			return false;
-		}
-
-		$mount = $this->getMountForLock($absolutePath, $lockMountPoint);
-		try {
-			$storage = $mount->getStorage();
-			if ($storage && $storage->instanceOfStorage('\OCP\Files\Storage\ILockingStorage')) {
-				$storage->acquireLock(
-					$mount->getInternalPath($absolutePath),
-					$type,
-					$this->lockingProvider
-				);
-			}
-		} catch (LockedException $e) {
-			// rethrow with the human-readable path
-			throw new LockedException(
-				$path,
-				$e,
-				$e->getExistingLock()
-			);
-		}
-
-		return true;
-	}
-
-	/**
-	 * Change the lock type
-	 *
-	 * @param string $path the path of the file to lock, relative to the view
-	 * @param int $type \OCP\Lock\ILockingProvider::LOCK_SHARED or \OCP\Lock\ILockingProvider::LOCK_EXCLUSIVE
-	 * @param bool $lockMountPoint true to lock the mount point, false to lock the attached mount/storage
-	 *
-	 * @return bool False if the path is excluded from locking, true otherwise
-	 * @throws LockedException if the path is already locked
-	 */
-	public function changeLock($path, $type, $lockMountPoint = false) {
-		$path = Filesystem::normalizePath($path);
-		$absolutePath = $this->getAbsolutePath($path);
-		$absolutePath = Filesystem::normalizePath($absolutePath);
-		if (!$this->shouldLockFile($absolutePath)) {
-			return false;
-		}
-
-		$mount = $this->getMountForLock($absolutePath, $lockMountPoint);
-		try {
-			$storage = $mount->getStorage();
-			if ($storage && $storage->instanceOfStorage('\OCP\Files\Storage\ILockingStorage')) {
-				$storage->changeLock(
-					$mount->getInternalPath($absolutePath),
-					$type,
-					$this->lockingProvider
-				);
-			}
-		} catch (LockedException $e) {
-			// rethrow with the a human-readable path
-			throw new LockedException(
-				$path,
-				$e,
-				$e->getExistingLock()
-			);
-		}
-
-		return true;
-	}
-
-	/**
-	 * Unlock the given path
-	 *
-	 * @param string $path the path of the file to unlock, relative to the view
-	 * @param int $type \OCP\Lock\ILockingProvider::LOCK_SHARED or \OCP\Lock\ILockingProvider::LOCK_EXCLUSIVE
-	 * @param bool $lockMountPoint true to lock the mount point, false to lock the attached mount/storage
-	 *
-	 * @return bool False if the path is excluded from locking, true otherwise
-	 * @throws LockedException
-	 */
-	private function unlockPath($path, $type, $lockMountPoint = false) {
-		$absolutePath = $this->getAbsolutePath($path);
-		$absolutePath = Filesystem::normalizePath($absolutePath);
-		if (!$this->shouldLockFile($absolutePath)) {
-			return false;
-		}
-
-		$mount = $this->getMountForLock($absolutePath, $lockMountPoint);
-		$storage = $mount->getStorage();
-		if ($storage && $storage->instanceOfStorage('\OCP\Files\Storage\ILockingStorage')) {
-			$storage->releaseLock(
-				$mount->getInternalPath($absolutePath),
-				$type,
-				$this->lockingProvider
-			);
-		}
-
-		return true;
-	}
-
-	/**
-	 * Lock a path and all its parents up to the root of the view
-	 *
-	 * @param string $path the path of the file to lock relative to the view
-	 * @param int $type \OCP\Lock\ILockingProvider::LOCK_SHARED or \OCP\Lock\ILockingProvider::LOCK_EXCLUSIVE
-	 * @param bool $lockMountPoint true to lock the mount point, false to lock the attached mount/storage
-	 *
-	 * @return bool False if the path is excluded from locking, true otherwise
-	 * @throws LockedException
-	 */
-	public function lockFile($path, $type, $lockMountPoint = false) {
-		$absolutePath = $this->getAbsolutePath($path);
-		$absolutePath = Filesystem::normalizePath($absolutePath);
-		if (!$this->shouldLockFile($absolutePath)) {
-			return false;
-		}
-
-		$this->lockPath($path, $type, $lockMountPoint);
-
-		$parents = $this->getParents($path);
-		foreach ($parents as $parent) {
-			$this->lockPath($parent, ILockingProvider::LOCK_SHARED);
-		}
-
-		return true;
-	}
-
-	/**
-	 * Unlock a path and all its parents up to the root of the view
-	 *
-	 * @param string $path the path of the file to lock relative to the view
-	 * @param int $type \OCP\Lock\ILockingProvider::LOCK_SHARED or \OCP\Lock\ILockingProvider::LOCK_EXCLUSIVE
-	 * @param bool $lockMountPoint true to lock the mount point, false to lock the attached mount/storage
-	 *
-	 * @return bool False if the path is excluded from locking, true otherwise
-	 * @throws LockedException
-	 */
-	public function unlockFile($path, $type, $lockMountPoint = false) {
-		$absolutePath = $this->getAbsolutePath($path);
-		$absolutePath = Filesystem::normalizePath($absolutePath);
-		if (!$this->shouldLockFile($absolutePath)) {
-			return false;
-		}
-
-		$this->unlockPath($path, $type, $lockMountPoint);
-
-		$parents = $this->getParents($path);
-		foreach ($parents as $parent) {
-			$this->unlockPath($parent, ILockingProvider::LOCK_SHARED);
-		}
-
-		return true;
-	}
-
-	/**
-	 * Only lock files in data/user/files/
-	 *
-	 * @param string $path Absolute path to the file/folder we try to (un)lock
-	 * @return bool
-	 */
-	protected function shouldLockFile($path) {
-		$path = Filesystem::normalizePath($path);
-
-		$pathSegments = explode('/', $path);
-		if (isset($pathSegments[2])) {
-			// E.g.: /username/files/path-to-file
-			return ($pathSegments[2] === 'files') && (count($pathSegments) > 3);
-		}
-
-		return !str_starts_with($path, '/appdata_');
-	}
-
-	/**
-	 * Shortens the given absolute path to be relative to
-	 * "$user/files".
-	 *
-	 * @param string $absolutePath absolute path which is under "files"
-	 *
-	 * @return string path relative to "files" with trimmed slashes or null
-	 *                if the path was NOT relative to files
-	 *
-	 * @throws \InvalidArgumentException if the given path was not under "files"
-	 * @since 8.1.0
-	 */
-	public function getPathRelativeToFiles($absolutePath) {
-		$path = Filesystem::normalizePath($absolutePath);
-		$parts = explode('/', trim($path, '/'), 3);
-		// "$user", "files", "path/to/dir"
-		if (!isset($parts[1]) || $parts[1] !== 'files') {
-			$this->logger->error(
-				'$absolutePath must be relative to "files", value is "{absolutePath}"',
-				[
-					'absolutePath' => $absolutePath,
-				]
-			);
-			throw new \InvalidArgumentException('$absolutePath must be relative to "files"');
-		}
-		if (isset($parts[2])) {
-			return $parts[2];
-		}
-		return '';
-	}
-
-	/**
-	 * @param string $filename
-	 * @return array
-	 * @throws \OC\User\NoUserException
-	 * @throws NotFoundException
-	 */
-	public function getUidAndFilename($filename) {
-		$info = $this->getFileInfo($filename);
-		if (!$info instanceof \OCP\Files\FileInfo) {
-			throw new NotFoundException($this->getAbsolutePath($filename) . ' not found');
-		}
-		$uid = $info->getOwner()->getUID();
-		if ($uid != \OC_User::getUser()) {
-			Filesystem::initMountPoints($uid);
-			$ownerView = new View('/' . $uid . '/files');
-			try {
-				$filename = $ownerView->getPath($info['fileid']);
-			} catch (NotFoundException $e) {
-				throw new NotFoundException('File with id ' . $info['fileid'] . ' not found for user ' . $uid);
-			}
-		}
-		return [$uid, $filename];
-	}
-
-	/**
-	 * Creates parent non-existing folders
-	 *
-	 * @param string $filePath
-	 * @return bool
-	 */
-	private function createParentDirectories($filePath) {
-		$directoryParts = explode('/', $filePath);
-		$directoryParts = array_filter($directoryParts);
-		foreach ($directoryParts as $key => $part) {
-			$currentPathElements = array_slice($directoryParts, 0, $key);
-			$currentPath = '/' . implode('/', $currentPathElements);
-			if ($this->is_file($currentPath)) {
-				return false;
-			}
-			if (!$this->file_exists($currentPath)) {
-				$this->mkdir($currentPath);
-			}
-		}
-
-		return true;
-	}
+    private string $fakeRoot = '';
+    private ILockingProvider $lockingProvider;
+    private bool $lockingEnabled;
+    private bool $updaterEnabled = true;
+    private UserManager $userManager;
+    private LoggerInterface $logger;
+
+    /**
+     * @throws \Exception If $root contains an invalid path
+     */
+    public function __construct(string $root = '') {
+        if (!Filesystem::isValidPath($root)) {
+            throw new \Exception();
+        }
+
+        $this->fakeRoot = $root;
+        $this->lockingProvider = \OC::$server->get(ILockingProvider::class);
+        $this->lockingEnabled = !($this->lockingProvider instanceof \OC\Lock\NoopLockingProvider);
+        $this->userManager = \OC::$server->getUserManager();
+        $this->logger = \OC::$server->get(LoggerInterface::class);
+    }
+
+    /**
+     * @param ?string $path
+     * @psalm-template S as string|null
+     * @psalm-param S $path
+     * @psalm-return (S is string ? string : null)
+     */
+    public function getAbsolutePath($path = '/'): ?string {
+        if ($path === null) {
+            return null;
+        }
+        $this->assertPathLength($path);
+        return PathHelper::normalizePath($this->fakeRoot . '/' . $path);
+    }
+
+    /**
+     * Change the root to a fake root
+     *
+     * @param string $fakeRoot
+     */
+    public function chroot($fakeRoot): void {
+        if (!$fakeRoot == '') {
+            if ($fakeRoot[0] !== '/') {
+                $fakeRoot = '/' . $fakeRoot;
+            }
+        }
+        $this->fakeRoot = $fakeRoot;
+    }
+
+    /**
+     * Get the fake root
+     */
+    public function getRoot(): string {
+        return $this->fakeRoot;
+    }
+
+    /**
+     * get path relative to the root of the view
+     *
+     * @param string $path
+     */
+    public function getRelativePath($path): ?string {
+        $this->assertPathLength($path);
+        if ($this->fakeRoot == '') {
+            return $path;
+        }
+
+        if (rtrim($path, '/') === rtrim($this->fakeRoot, '/')) {
+            return '/';
+        }
+
+        // missing slashes can cause wrong matches!
+        $root = rtrim($this->fakeRoot, '/') . '/';
+
+        if (!str_starts_with($path, $root)) {
+            return null;
+        } else {
+            $path = substr($path, strlen($this->fakeRoot));
+            if (strlen($path) === 0) {
+                return '/';
+            } else {
+                return $path;
+            }
+        }
+    }
+
+    /**
+     * Get the mountpoint of the storage object for a path
+     * ( note: because a storage is not always mounted inside the fakeroot, the
+     * returned mountpoint is relative to the absolute root of the filesystem
+     * and does not take the chroot into account )
+     *
+     * @param string $path
+     */
+    public function getMountPoint($path): string {
+        return Filesystem::getMountPoint($this->getAbsolutePath($path));
+    }
+
+    /**
+     * Get the mountpoint of the storage object for a path
+     * ( note: because a storage is not always mounted inside the fakeroot, the
+     * returned mountpoint is relative to the absolute root of the filesystem
+     * and does not take the chroot into account )
+     *
+     * @param string $path
+     */
+    public function getMount($path): IMountPoint {
+        return Filesystem::getMountManager()->find($this->getAbsolutePath($path));
+    }
+
+    /**
+     * Resolve a path to a storage and internal path
+     *
+     * @param string $path
+     * @return array{?\OCP\Files\Storage\IStorage, string} an array consisting of the storage and the internal path
+     */
+    public function resolvePath($path): array {
+        $a = $this->getAbsolutePath($path);
+        $p = Filesystem::normalizePath($a);
+        return Filesystem::resolvePath($p);
+    }
+
+    /**
+     * Return the path to a local version of the file
+     * we need this because we can't know if a file is stored local or not from
+     * outside the filestorage and for some purposes a local file is needed
+     *
+     * @param string $path
+     */
+    public function getLocalFile($path): string|false {
+        $parent = substr($path, 0, strrpos($path, '/') ?: 0);
+        $path = $this->getAbsolutePath($path);
+        [$storage, $internalPath] = Filesystem::resolvePath($path);
+        if (Filesystem::isValidPath($parent) && $storage) {
+            return $storage->getLocalFile($internalPath);
+        } else {
+            return false;
+        }
+    }
+
+    /**
+     * the following functions operate with arguments and return values identical
+     * to those of their PHP built-in equivalents. Mostly they are merely wrappers
+     * for \OC\Files\Storage\Storage via basicOperation().
+     */
+    public function mkdir($path) {
+        return $this->basicOperation('mkdir', $path, ['create', 'write']);
+    }
+
+    /**
+     * remove mount point
+     *
+     * @param IMountPoint $mount
+     * @param string $path relative to data/
+     */
+    protected function removeMount($mount, $path): bool {
+        if ($mount instanceof MoveableMount) {
+            // cut of /user/files to get the relative path to data/user/files
+            $pathParts = explode('/', $path, 4);
+            $relPath = '/' . $pathParts[3];
+            $this->lockFile($relPath, ILockingProvider::LOCK_SHARED, true);
+            \OC_Hook::emit(
+                Filesystem::CLASSNAME, 'umount',
+                [Filesystem::signal_param_path => $relPath]
+            );
+            $this->changeLock($relPath, ILockingProvider::LOCK_EXCLUSIVE, true);
+            $result = $mount->removeMount();
+            $this->changeLock($relPath, ILockingProvider::LOCK_SHARED, true);
+            if ($result) {
+                \OC_Hook::emit(
+                    Filesystem::CLASSNAME, 'post_umount',
+                    [Filesystem::signal_param_path => $relPath]
+                );
+            }
+            $this->unlockFile($relPath, ILockingProvider::LOCK_SHARED, true);
+            return $result;
+        } else {
+            // do not allow deleting the storage's root / the mount point
+            // because for some storages it might delete the whole contents
+            // but isn't supposed to work that way
+            return false;
+        }
+    }
+
+    public function disableCacheUpdate(): void {
+        $this->updaterEnabled = false;
+    }
+
+    public function enableCacheUpdate(): void {
+        $this->updaterEnabled = true;
+    }
+
+    protected function writeUpdate(Storage $storage, string $internalPath, ?int $time = null, ?int $sizeDifference = null): void {
+        if ($this->updaterEnabled) {
+            if (is_null($time)) {
+                $time = time();
+            }
+            $storage->getUpdater()->update($internalPath, $time, $sizeDifference);
+        }
+    }
+
+    protected function removeUpdate(Storage $storage, string $internalPath): void {
+        if ($this->updaterEnabled) {
+            $storage->getUpdater()->remove($internalPath);
+        }
+    }
+
+    protected function renameUpdate(Storage $sourceStorage, Storage $targetStorage, string $sourceInternalPath, string $targetInternalPath): void {
+        if ($this->updaterEnabled) {
+            $targetStorage->getUpdater()->renameFromStorage($sourceStorage, $sourceInternalPath, $targetInternalPath);
+        }
+    }
+
+    protected function copyUpdate(Storage $sourceStorage, Storage $targetStorage, string $sourceInternalPath, string $targetInternalPath): void {
+        if ($this->updaterEnabled) {
+            $targetStorage->getUpdater()->copyFromStorage($sourceStorage, $sourceInternalPath, $targetInternalPath);
+        }
+    }
+
+    /**
+     * @param string $path
+     * @return bool|mixed
+     */
+    public function rmdir($path) {
+        $absolutePath = $this->getAbsolutePath($path);
+        $mount = Filesystem::getMountManager()->find($absolutePath);
+        if ($mount->getInternalPath($absolutePath) === '') {
+            return $this->removeMount($mount, $absolutePath);
+        }
+        if ($this->is_dir($path)) {
+            $result = $this->basicOperation('rmdir', $path, ['delete']);
+        } else {
+            $result = false;
+        }
+
+        if (!$result && !$this->file_exists($path)) { //clear ghost files from the cache on delete
+            $storage = $mount->getStorage();
+            $internalPath = $mount->getInternalPath($absolutePath);
+            $storage->getUpdater()->remove($internalPath);
+        }
+        return $result;
+    }
+
+    /**
+     * @param string $path
+     * @return resource|false
+     */
+    public function opendir($path) {
+        return $this->basicOperation('opendir', $path, ['read']);
+    }
+
+    /**
+     * @param string $path
+     * @return bool|mixed
+     */
+    public function is_dir($path) {
+        if ($path == '/') {
+            return true;
+        }
+        return $this->basicOperation('is_dir', $path);
+    }
+
+    /**
+     * @param string $path
+     * @return bool|mixed
+     */
+    public function is_file($path) {
+        if ($path == '/') {
+            return false;
+        }
+        return $this->basicOperation('is_file', $path);
+    }
+
+    /**
+     * @param string $path
+     * @return mixed
+     */
+    public function stat($path) {
+        return $this->basicOperation('stat', $path);
+    }
+
+    /**
+     * @param string $path
+     * @return mixed
+     */
+    public function filetype($path) {
+        return $this->basicOperation('filetype', $path);
+    }
+
+    /**
+     * @param string $path
+     * @return mixed
+     */
+    public function filesize(string $path) {
+        return $this->basicOperation('filesize', $path);
+    }
+
+    /**
+     * @param string $path
+     * @return bool|mixed
+     * @throws InvalidPathException
+     */
+    public function readfile($path) {
+        $this->assertPathLength($path);
+        if (ob_get_level()) {
+            ob_end_clean();
+        }
+        $handle = $this->fopen($path, 'rb');
+        if ($handle) {
+            $chunkSize = 524288; // 512 kiB chunks
+            while (!feof($handle)) {
+                echo fread($handle, $chunkSize);
+                flush();
+                $this->checkConnectionStatus();
+            }
+            fclose($handle);
+            return $this->filesize($path);
+        }
+        return false;
+    }
+
+    /**
+     * @param string $path
+     * @param int $from
+     * @param int $to
+     * @return bool|mixed
+     * @throws InvalidPathException
+     * @throws \OCP\Files\UnseekableException
+     */
+    public function readfilePart($path, $from, $to) {
+        $this->assertPathLength($path);
+        if (ob_get_level()) {
+            ob_end_clean();
+        }
+        $handle = $this->fopen($path, 'rb');
+        if ($handle) {
+            $chunkSize = 524288; // 512 kiB chunks
+            $startReading = true;
+
+            if ($from !== 0 && $from !== '0' && fseek($handle, $from) !== 0) {
+                // forward file handle via chunked fread because fseek seem to have failed
+
+                $end = $from + 1;
+                while (!feof($handle) && ftell($handle) < $end && ftell($handle) !== $from) {
+                    $len = $from - ftell($handle);
+                    if ($len > $chunkSize) {
+                        $len = $chunkSize;
+                    }
+                    $result = fread($handle, $len);
+
+                    if ($result === false) {
+                        $startReading = false;
+                        break;
+                    }
+                }
+            }
+
+            if ($startReading) {
+                $end = $to + 1;
+                while (!feof($handle) && ftell($handle) < $end) {
+                    $len = $end - ftell($handle);
+                    if ($len > $chunkSize) {
+                        $len = $chunkSize;
+                    }
+                    echo fread($handle, $len);
+                    flush();
+                    $this->checkConnectionStatus();
+                }
+                return ftell($handle) - $from;
+            }
+
+            throw new \OCP\Files\UnseekableException('fseek error');
+        }
+        return false;
+    }
+
+    private function checkConnectionStatus(): void {
+        $connectionStatus = \connection_status();
+        if ($connectionStatus !== CONNECTION_NORMAL) {
+            throw new ConnectionLostException("Connection lost. Status: $connectionStatus");
+        }
+    }
+
+    /**
+     * @param string $path
+     * @return mixed
+     */
+    public function isCreatable($path) {
+        return $this->basicOperation('isCreatable', $path);
+    }
+
+    /**
+     * @param string $path
+     * @return mixed
+     */
+    public function isReadable($path) {
+        return $this->basicOperation('isReadable', $path);
+    }
+
+    /**
+     * @param string $path
+     * @return mixed
+     */
+    public function isUpdatable($path) {
+        return $this->basicOperation('isUpdatable', $path);
+    }
+
+    /**
+     * @param string $path
+     * @return bool|mixed
+     */
+    public function isDeletable($path) {
+        $absolutePath = $this->getAbsolutePath($path);
+        $mount = Filesystem::getMountManager()->find($absolutePath);
+        if ($mount->getInternalPath($absolutePath) === '') {
+            return $mount instanceof MoveableMount;
+        }
+        return $this->basicOperation('isDeletable', $path);
+    }
+
+    /**
+     * @param string $path
+     * @return mixed
+     */
+    public function isSharable($path) {
+        return $this->basicOperation('isSharable', $path);
+    }
+
+    /**
+     * @param string $path
+     * @return bool|mixed
+     */
+    public function file_exists($path) {
+        if ($path == '/') {
+            return true;
+        }
+        return $this->basicOperation('file_exists', $path);
+    }
+
+    /**
+     * @param string $path
+     * @return mixed
+     */
+    public function filemtime($path) {
+        return $this->basicOperation('filemtime', $path);
+    }
+
+    /**
+     * @param string $path
+     * @param int|string $mtime
+     */
+    public function touch($path, $mtime = null): bool {
+        if (!is_null($mtime) && !is_numeric($mtime)) {
+            $mtime = strtotime($mtime);
+        }
+
+        $hooks = ['touch'];
+
+        if (!$this->file_exists($path)) {
+            $hooks[] = 'create';
+            $hooks[] = 'write';
+        }
+        try {
+            $result = $this->basicOperation('touch', $path, $hooks, $mtime);
+        } catch (\Exception $e) {
+            $this->logger->info('Error while setting modified time', ['app' => 'core', 'exception' => $e]);
+            $result = false;
+        }
+        if (!$result) {
+            // If create file fails because of permissions on external storage like SMB folders,
+            // check file exists and return false if not.
+            if (!$this->file_exists($path)) {
+                return false;
+            }
+            if (is_null($mtime)) {
+                $mtime = time();
+            }
+            //if native touch fails, we emulate it by changing the mtime in the cache
+            $this->putFileInfo($path, ['mtime' => floor($mtime)]);
+        }
+        return true;
+    }
+
+    /**
+     * @param string $path
+     * @return string|false
+     * @throws LockedException
+     */
+    public function file_get_contents($path) {
+        return $this->basicOperation('file_get_contents', $path, ['read']);
+    }
+
+    protected function emit_file_hooks_pre(bool $exists, string $path, bool &$run): void {
+        if (!$exists) {
+            \OC_Hook::emit(Filesystem::CLASSNAME, Filesystem::signal_create, [
+                Filesystem::signal_param_path => $this->getHookPath($path),
+                Filesystem::signal_param_run => &$run,
+            ]);
+        } else {
+            \OC_Hook::emit(Filesystem::CLASSNAME, Filesystem::signal_update, [
+                Filesystem::signal_param_path => $this->getHookPath($path),
+                Filesystem::signal_param_run => &$run,
+            ]);
+        }
+        \OC_Hook::emit(Filesystem::CLASSNAME, Filesystem::signal_write, [
+            Filesystem::signal_param_path => $this->getHookPath($path),
+            Filesystem::signal_param_run => &$run,
+        ]);
+    }
+
+    protected function emit_file_hooks_post(bool $exists, string $path): void {
+        if (!$exists) {
+            \OC_Hook::emit(Filesystem::CLASSNAME, Filesystem::signal_post_create, [
+                Filesystem::signal_param_path => $this->getHookPath($path),
+            ]);
+        } else {
+            \OC_Hook::emit(Filesystem::CLASSNAME, Filesystem::signal_post_update, [
+                Filesystem::signal_param_path => $this->getHookPath($path),
+            ]);
+        }
+        \OC_Hook::emit(Filesystem::CLASSNAME, Filesystem::signal_post_write, [
+            Filesystem::signal_param_path => $this->getHookPath($path),
+        ]);
+    }
+
+    /**
+     * @param string $path
+     * @param string|resource $data
+     * @return bool|mixed
+     * @throws LockedException
+     */
+    public function file_put_contents($path, $data) {
+        if (is_resource($data)) { //not having to deal with streams in file_put_contents makes life easier
+            $absolutePath = Filesystem::normalizePath($this->getAbsolutePath($path));
+            if (Filesystem::isValidPath($path)
+                && !Filesystem::isFileBlacklisted($path)
+            ) {
+                $path = $this->getRelativePath($absolutePath);
+                if ($path === null) {
+                    throw new InvalidPathException("Path $absolutePath is not in the expected root");
+                }
+
+                $this->lockFile($path, ILockingProvider::LOCK_SHARED);
+
+                $exists = $this->file_exists($path);
+                if ($this->shouldEmitHooks($path)) {
+                    $run = true;
+                    $this->emit_file_hooks_pre($exists, $path, $run);
+                    if (!$run) {
+                        $this->unlockFile($path, ILockingProvider::LOCK_SHARED);
+                        return false;
+                    }
+                }
+
+                try {
+                    $this->changeLock($path, ILockingProvider::LOCK_EXCLUSIVE);
+                } catch (\Exception $e) {
+                    // Release the shared lock before throwing.
+                    $this->unlockFile($path, ILockingProvider::LOCK_SHARED);
+                    throw $e;
+                }
+
+                /** @var Storage $storage */
+                [$storage, $internalPath] = $this->resolvePath($path);
+                $target = $storage->fopen($internalPath, 'w');
+                if ($target) {
+                    [, $result] = Files::streamCopy($data, $target, true);
+                    fclose($target);
+                    fclose($data);
+
+                    $this->writeUpdate($storage, $internalPath);
+
+                    $this->changeLock($path, ILockingProvider::LOCK_SHARED);
+
+                    if ($this->shouldEmitHooks($path) && $result !== false) {
+                        $this->emit_file_hooks_post($exists, $path);
+                    }
+                    $this->unlockFile($path, ILockingProvider::LOCK_SHARED);
+                    return $result;
+                } else {
+                    $this->unlockFile($path, ILockingProvider::LOCK_EXCLUSIVE);
+                    return false;
+                }
+            } else {
+                return false;
+            }
+        } else {
+            $hooks = $this->file_exists($path) ? ['update', 'write'] : ['create', 'write'];
+            return $this->basicOperation('file_put_contents', $path, $hooks, $data);
+        }
+    }
+
+    /**
+     * @param string $path
+     * @return bool|mixed
+     */
+    public function unlink($path) {
+        if ($path === '' || $path === '/') {
+            // do not allow deleting the root
+            return false;
+        }
+        $postFix = (substr($path, -1) === '/') ? '/' : '';
+        $absolutePath = Filesystem::normalizePath($this->getAbsolutePath($path));
+        $mount = Filesystem::getMountManager()->find($absolutePath . $postFix);
+        if ($mount->getInternalPath($absolutePath) === '') {
+            return $this->removeMount($mount, $absolutePath);
+        }
+        if ($this->is_dir($path)) {
+            $result = $this->basicOperation('rmdir', $path, ['delete']);
+        } else {
+            $result = $this->basicOperation('unlink', $path, ['delete']);
+        }
+        if (!$result && !$this->file_exists($path)) { //clear ghost files from the cache on delete
+            $storage = $mount->getStorage();
+            $internalPath = $mount->getInternalPath($absolutePath);
+            $storage->getUpdater()->remove($internalPath);
+            return true;
+        } else {
+            return $result;
+        }
+    }
+
+    /**
+     * @param string $directory
+     * @return bool|mixed
+     */
+    public function deleteAll($directory) {
+        return $this->rmdir($directory);
+    }
+
+    /**
+     * Rename/move a file or folder from the source path to target path.
+     *
+     * @param string $source source path
+     * @param string $target target path
+     * @param array $options
+     *
+     * @return bool|mixed
+     * @throws LockedException
+     */
+    public function rename($source, $target, array $options = []) {
+        $checkSubMounts = $options['checkSubMounts'] ?? true;
+
+        $absolutePath1 = Filesystem::normalizePath($this->getAbsolutePath($source));
+        $absolutePath2 = Filesystem::normalizePath($this->getAbsolutePath($target));
+
+        if (str_starts_with($absolutePath2, $absolutePath1 . '/')) {
+            throw new ForbiddenException('Moving a folder into a child folder is forbidden', false);
+        }
+
+        /** @var IMountManager $mountManager */
+        $mountManager = \OC::$server->get(IMountManager::class);
+
+        $targetParts = explode('/', $absolutePath2);
+        $targetUser = $targetParts[1] ?? null;
+        $result = false;
+        if (
+            Filesystem::isValidPath($target)
+            && Filesystem::isValidPath($source)
+            && !Filesystem::isFileBlacklisted($target)
+        ) {
+            $source = $this->getRelativePath($absolutePath1);
+            $target = $this->getRelativePath($absolutePath2);
+            $exists = $this->file_exists($target);
+
+            if ($source == null || $target == null) {
+                return false;
+            }
+
+            try {
+                $this->verifyPath(dirname($target), basename($target));
+            } catch (InvalidPathException) {
+                return false;
+            }
+
+            $this->lockFile($source, ILockingProvider::LOCK_SHARED, true);
+            try {
+                $this->lockFile($target, ILockingProvider::LOCK_SHARED, true);
+
+                $run = true;
+                if ($this->shouldEmitHooks($source) && (Cache\Scanner::isPartialFile($source) && !Cache\Scanner::isPartialFile($target))) {
+                    // if it was a rename from a part file to a regular file it was a write and not a rename operation
+                    $this->emit_file_hooks_pre($exists, $target, $run);
+                } elseif ($this->shouldEmitHooks($source)) {
+                    $sourcePath = $this->getHookPath($source);
+                    $targetPath = $this->getHookPath($target);
+                    if ($sourcePath !== null && $targetPath !== null) {
+                        \OC_Hook::emit(
+                            Filesystem::CLASSNAME, Filesystem::signal_rename,
+                            [
+                                Filesystem::signal_param_oldpath => $sourcePath,
+                                Filesystem::signal_param_newpath => $targetPath,
+                                Filesystem::signal_param_run => &$run
+                            ]
+                        );
+                    }
+                }
+                if ($run) {
+                    $manager = Filesystem::getMountManager();
+                    $mount1 = $this->getMount($source);
+                    $mount2 = $this->getMount($target);
+                    $storage1 = $mount1->getStorage();
+                    $storage2 = $mount2->getStorage();
+                    $internalPath1 = $mount1->getInternalPath($absolutePath1);
+                    $internalPath2 = $mount2->getInternalPath($absolutePath2);
+
+                    $this->changeLock($source, ILockingProvider::LOCK_EXCLUSIVE, true);
+                    try {
+                        $this->changeLock($target, ILockingProvider::LOCK_EXCLUSIVE, true);
+
+                        if ($checkSubMounts) {
+                            $movedMounts = $mountManager->findIn($this->getAbsolutePath($source));
+                        } else {
+                            $movedMounts = [];
+                        }
+
+                        if ($internalPath1 === '') {
+                            $sourceParentMount = $this->getMount(dirname($source));
+                            $movedMounts[] = $mount1;
+                            $this->validateMountMove($movedMounts, $sourceParentMount, $mount2, !$this->targetIsNotShared($targetUser, $absolutePath2));
+                            /**
+                             * @var \OC\Files\Mount\MountPoint | \OC\Files\Mount\MoveableMount $mount1
+                             */
+                            $sourceMountPoint = $mount1->getMountPoint();
+                            $result = $mount1->moveMount($absolutePath2);
+                            $manager->moveMount($sourceMountPoint, $mount1->getMountPoint());
+
+                            // moving a file/folder within the same mount point
+                        } elseif ($storage1 === $storage2) {
+                            if (count($movedMounts) > 0) {
+                                $this->validateMountMove($movedMounts, $mount1, $mount2, !$this->targetIsNotShared($targetUser, $absolutePath2));
+                            }
+                            if ($storage1) {
+                                $result = $storage1->rename($internalPath1, $internalPath2);
+                            } else {
+                                $result = false;
+                            }
+                            // moving a file/folder between storages (from $storage1 to $storage2)
+                        } else {
+                            if (count($movedMounts) > 0) {
+                                $this->validateMountMove($movedMounts, $mount1, $mount2, !$this->targetIsNotShared($targetUser, $absolutePath2));
+                            }
+                            $result = $storage2->moveFromStorage($storage1, $internalPath1, $internalPath2);
+                        }
+
+                        if ((Cache\Scanner::isPartialFile($source) && !Cache\Scanner::isPartialFile($target)) && $result !== false) {
+                            // if it was a rename from a part file to a regular file it was a write and not a rename operation
+                            $this->writeUpdate($storage2, $internalPath2);
+                        } elseif ($result) {
+                            if ($internalPath1 !== '') { // don't do a cache update for moved mounts
+                                $this->renameUpdate($storage1, $storage2, $internalPath1, $internalPath2);
+                            }
+                        }
+                    } catch (\Exception $e) {
+                        throw $e;
+                    } finally {
+                        $this->changeLock($source, ILockingProvider::LOCK_SHARED, true);
+                        $this->changeLock($target, ILockingProvider::LOCK_SHARED, true);
+                    }
+
+                    if ((Cache\Scanner::isPartialFile($source) && !Cache\Scanner::isPartialFile($target)) && $result !== false) {
+                        if ($this->shouldEmitHooks()) {
+                            $this->emit_file_hooks_post($exists, $target);
+                        }
+                    } elseif ($result) {
+                        if ($this->shouldEmitHooks($source) && $this->shouldEmitHooks($target)) {
+                            $sourcePath = $this->getHookPath($source);
+                            $targetPath = $this->getHookPath($target);
+                            if ($sourcePath !== null && $targetPath !== null) {
+                                \OC_Hook::emit(
+                                    Filesystem::CLASSNAME,
+                                    Filesystem::signal_post_rename,
+                                    [
+                                        Filesystem::signal_param_oldpath => $sourcePath,
+                                        Filesystem::signal_param_newpath => $targetPath,
+                                    ]
+                                );
+                            }
+                        }
+                    }
+                }
+            } catch (\Exception $e) {
+                throw $e;
+            } finally {
+                $this->unlockFile($source, ILockingProvider::LOCK_SHARED, true);
+                $this->unlockFile($target, ILockingProvider::LOCK_SHARED, true);
+            }
+        }
+        return $result;
+    }
+
+    /**
+     * @throws ForbiddenException
+     */
+    private function validateMountMove(array $mounts, IMountPoint $sourceMount, IMountPoint $targetMount, bool $targetIsShared): void {
+        $targetPath = $this->getRelativePath($targetMount->getMountPoint());
+        if ($targetPath) {
+            $targetPath = trim($targetPath, '/');
+        } else {
+            $targetPath = $targetMount->getMountPoint();
+        }
+
+        $l = \OC::$server->get(IFactory::class)->get('files');
+        foreach ($mounts as $mount) {
+            $sourcePath = $this->getRelativePath($mount->getMountPoint());
+            if ($sourcePath) {
+                $sourcePath = trim($sourcePath, '/');
+            } else {
+                $sourcePath = $mount->getMountPoint();
+            }
+
+            if (!$mount instanceof MoveableMount) {
+                throw new ForbiddenException($l->t('Storage %s cannot be moved', [$sourcePath]), false);
+            }
+
+            if ($targetIsShared) {
+                if ($sourceMount instanceof SharedMount) {
+                    throw new ForbiddenException($l->t('Moving a share (%s) into a shared folder is not allowed', [$sourcePath]), false);
+                } else {
+                    throw new ForbiddenException($l->t('Moving a storage (%s) into a shared folder is not allowed', [$sourcePath]), false);
+                }
+            }
+
+            if ($sourceMount !== $targetMount) {
+                if ($sourceMount instanceof SharedMount) {
+                    if ($targetMount instanceof SharedMount) {
+                        throw new ForbiddenException($l->t('Moving a share (%s) into another share (%s) is not allowed', [$sourcePath, $targetPath]), false);
+                    } else {
+                        throw new ForbiddenException($l->t('Moving a share (%s) into another storage (%s) is not allowed', [$sourcePath, $targetPath]), false);
+                    }
+                } else {
+                    if ($targetMount instanceof SharedMount) {
+                        throw new ForbiddenException($l->t('Moving a storage (%s) into a share (%s) is not allowed', [$sourcePath, $targetPath]), false);
+                    } else {
+                        throw new ForbiddenException($l->t('Moving a storage (%s) into another storage (%s) is not allowed', [$sourcePath, $targetPath]), false);
+                    }
+                }
+            }
+        }
+    }
+
+    /**
+     * Copy a file/folder from the source path to target path
+     *
+     * @param string $source source path
+     * @param string $target target path
+     * @param bool $preserveMtime whether to preserve mtime on the copy
+     *
+     * @return bool|mixed
+     */
+    public function copy($source, $target, $preserveMtime = false) {
+        $absolutePath1 = Filesystem::normalizePath($this->getAbsolutePath($source));
+        $absolutePath2 = Filesystem::normalizePath($this->getAbsolutePath($target));
+        $result = false;
+        if (
+            Filesystem::isValidPath($target)
+            && Filesystem::isValidPath($source)
+            && !Filesystem::isFileBlacklisted($target)
+        ) {
+            $source = $this->getRelativePath($absolutePath1);
+            $target = $this->getRelativePath($absolutePath2);
+
+            if ($source == null || $target == null) {
+                return false;
+            }
+            $run = true;
+
+            $this->lockFile($target, ILockingProvider::LOCK_SHARED);
+            $this->lockFile($source, ILockingProvider::LOCK_SHARED);
+            $lockTypePath1 = ILockingProvider::LOCK_SHARED;
+            $lockTypePath2 = ILockingProvider::LOCK_SHARED;
+
+            try {
+                $exists = $this->file_exists($target);
+                if ($this->shouldEmitHooks($target)) {
+                    \OC_Hook::emit(
+                        Filesystem::CLASSNAME,
+                        Filesystem::signal_copy,
+                        [
+                            Filesystem::signal_param_oldpath => $this->getHookPath($source),
+                            Filesystem::signal_param_newpath => $this->getHookPath($target),
+                            Filesystem::signal_param_run => &$run
+                        ]
+                    );
+                    $this->emit_file_hooks_pre($exists, $target, $run);
+                }
+                if ($run) {
+                    $mount1 = $this->getMount($source);
+                    $mount2 = $this->getMount($target);
+                    $storage1 = $mount1->getStorage();
+                    $internalPath1 = $mount1->getInternalPath($absolutePath1);
+                    $storage2 = $mount2->getStorage();
+                    $internalPath2 = $mount2->getInternalPath($absolutePath2);
+
+                    $this->changeLock($target, ILockingProvider::LOCK_EXCLUSIVE);
+                    $lockTypePath2 = ILockingProvider::LOCK_EXCLUSIVE;
+
+                    if ($mount1->getMountPoint() == $mount2->getMountPoint()) {
+                        if ($storage1) {
+                            $result = $storage1->copy($internalPath1, $internalPath2);
+                        } else {
+                            $result = false;
+                        }
+                    } else {
+                        $result = $storage2->copyFromStorage($storage1, $internalPath1, $internalPath2);
+                    }
+
+                    if ($result) {
+                        $this->copyUpdate($storage1, $storage2, $internalPath1, $internalPath2);
+                    }
+
+                    $this->changeLock($target, ILockingProvider::LOCK_SHARED);
+                    $lockTypePath2 = ILockingProvider::LOCK_SHARED;
+
+                    if ($this->shouldEmitHooks($target) && $result !== false) {
+                        \OC_Hook::emit(
+                            Filesystem::CLASSNAME,
+                            Filesystem::signal_post_copy,
+                            [
+                                Filesystem::signal_param_oldpath => $this->getHookPath($source),
+                                Filesystem::signal_param_newpath => $this->getHookPath($target)
+                            ]
+                        );
+                        $this->emit_file_hooks_post($exists, $target);
+                    }
+                }
+            } catch (\Exception $e) {
+                $this->unlockFile($target, $lockTypePath2);
+                $this->unlockFile($source, $lockTypePath1);
+                throw $e;
+            }
+
+            $this->unlockFile($target, $lockTypePath2);
+            $this->unlockFile($source, $lockTypePath1);
+        }
+        return $result;
+    }
+
+    /**
+     * @param string $path
+     * @param string $mode 'r' or 'w'
+     * @return resource|false
+     * @throws LockedException
+     */
+    public function fopen($path, $mode) {
+        $mode = str_replace('b', '', $mode); // the binary flag is a windows only feature which we do not support
+        $hooks = [];
+        switch ($mode) {
+            case 'r':
+                $hooks[] = 'read';
+                break;
+            case 'r+':
+            case 'w+':
+            case 'x+':
+            case 'a+':
+                $hooks[] = 'read';
+                $hooks[] = 'write';
+                break;
+            case 'w':
+            case 'x':
+            case 'a':
+                $hooks[] = 'write';
+                break;
+            default:
+                $this->logger->error('invalid mode (' . $mode . ') for ' . $path, ['app' => 'core']);
+        }
+
+        if ($mode !== 'r' && $mode !== 'w') {
+            $this->logger->info('Trying to open a file with a mode other than "r" or "w" can cause severe performance issues with some backends', ['app' => 'core']);
+        }
+
+        $handle = $this->basicOperation('fopen', $path, $hooks, $mode);
+        if (!is_resource($handle) && $mode === 'r') {
+            // trying to read a file that isn't on disk, check if the cache is out of sync and rescan if needed
+            $mount = $this->getMount($path);
+            $internalPath = $mount->getInternalPath($this->getAbsolutePath($path));
+            $storage = $mount->getStorage();
+            if ($storage->getCache()->inCache($internalPath) && !$storage->file_exists($path)) {
+                $this->writeUpdate($storage, $internalPath);
+            }
+        }
+        return $handle;
+    }
+
+    /**
+     * @param string $path
+     * @throws InvalidPathException
+     */
+    public function toTmpFile($path): string|false {
+        $this->assertPathLength($path);
+        if (Filesystem::isValidPath($path)) {
+            $source = $this->fopen($path, 'r');
+            if ($source) {
+                $extension = pathinfo($path, PATHINFO_EXTENSION);
+                $tmpFile = \OC::$server->getTempManager()->getTemporaryFile($extension);
+                file_put_contents($tmpFile, $source);
+                return $tmpFile;
+            } else {
+                return false;
+            }
+        } else {
+            return false;
+        }
+    }
+
+    /**
+     * @param string $tmpFile
+     * @param string $path
+     * @return bool|mixed
+     * @throws InvalidPathException
+     */
+    public function fromTmpFile($tmpFile, $path) {
+        $this->assertPathLength($path);
+        if (Filesystem::isValidPath($path)) {
+            // Get directory that the file is going into
+            $filePath = dirname($path);
+
+            // Create the directories if any
+            if (!$this->file_exists($filePath)) {
+                $result = $this->createParentDirectories($filePath);
+                if ($result === false) {
+                    return false;
+                }
+            }
+
+            $source = fopen($tmpFile, 'r');
+            if ($source) {
+                $result = $this->file_put_contents($path, $source);
+                /**
+                 * $this->file_put_contents() might have already closed
+                 * the resource, so we check it, before trying to close it
+                 * to avoid messages in the error log.
+                 * @psalm-suppress RedundantCondition false-positive
+                 */
+                if (is_resource($source)) {
+                    fclose($source);
+                }
+                unlink($tmpFile);
+                return $result;
+            } else {
+                return false;
+            }
+        } else {
+            return false;
+        }
+    }
+
+
+    /**
+     * @param string $path
+     * @return mixed
+     * @throws InvalidPathException
+     */
+    public function getMimeType($path) {
+        $this->assertPathLength($path);
+        return $this->basicOperation('getMimeType', $path);
+    }
+
+    /**
+     * @param string $type
+     * @param string $path
+     * @param bool $raw
+     */
+    public function hash($type, $path, $raw = false): string|bool {
+        $postFix = (substr($path, -1) === '/') ? '/' : '';
+        $absolutePath = Filesystem::normalizePath($this->getAbsolutePath($path));
+        if (Filesystem::isValidPath($path)) {
+            $path = $this->getRelativePath($absolutePath);
+            if ($path == null) {
+                return false;
+            }
+            if ($this->shouldEmitHooks($path)) {
+                \OC_Hook::emit(
+                    Filesystem::CLASSNAME,
+                    Filesystem::signal_read,
+                    [Filesystem::signal_param_path => $this->getHookPath($path)]
+                );
+            }
+            /** @var Storage|null $storage */
+            [$storage, $internalPath] = Filesystem::resolvePath($absolutePath . $postFix);
+            if ($storage) {
+                return $storage->hash($type, $internalPath, $raw);
+            }
+        }
+        return false;
+    }
+
+    /**
+     * @param string $path
+     * @return mixed
+     * @throws InvalidPathException
+     */
+    public function free_space($path = '/') {
+        $this->assertPathLength($path);
+        $result = $this->basicOperation('free_space', $path);
+        if ($result === null) {
+            throw new InvalidPathException();
+        }
+        return $result;
+    }
+
+    /**
+     * abstraction layer for basic filesystem functions: wrapper for \OC\Files\Storage\Storage
+     *
+     * @param mixed $extraParam (optional)
+     * @return mixed
+     * @throws LockedException
+     *
+     * This method takes requests for basic filesystem functions (e.g. reading & writing
+     * files), processes hooks and proxies, sanitises paths, and finally passes them on to
+     * \OC\Files\Storage\Storage for delegation to a storage backend for execution
+     */
+    private function basicOperation(string $operation, string $path, array $hooks = [], $extraParam = null) {
+        $postFix = (substr($path, -1) === '/') ? '/' : '';
+        $absolutePath = Filesystem::normalizePath($this->getAbsolutePath($path));
+        if (Filesystem::isValidPath($path)
+            && !Filesystem::isFileBlacklisted($path)
+        ) {
+            $path = $this->getRelativePath($absolutePath);
+            if ($path == null) {
+                return false;
+            }
+
+            if (in_array('write', $hooks) || in_array('delete', $hooks) || in_array('read', $hooks)) {
+                // always a shared lock during pre-hooks so the hook can read the file
+                $this->lockFile($path, ILockingProvider::LOCK_SHARED);
+            }
+
+            $run = $this->runHooks($hooks, $path);
+            [$storage, $internalPath] = Filesystem::resolvePath($absolutePath . $postFix);
+            if ($run && $storage) {
+                /** @var Storage $storage */
+                if (in_array('write', $hooks) || in_array('delete', $hooks)) {
+                    try {
+                        $this->changeLock($path, ILockingProvider::LOCK_EXCLUSIVE);
+                    } catch (LockedException $e) {
+                        // release the shared lock we acquired before quitting
+                        $this->unlockFile($path, ILockingProvider::LOCK_SHARED);
+                        throw $e;
+                    }
+                }
+                try {
+                    if (!is_null($extraParam)) {
+                        $result = $storage->$operation($internalPath, $extraParam);
+                    } else {
+                        $result = $storage->$operation($internalPath);
+                    }
+                } catch (\Exception $e) {
+                    if (in_array('write', $hooks) || in_array('delete', $hooks)) {
+                        $this->unlockFile($path, ILockingProvider::LOCK_EXCLUSIVE);
+                    } elseif (in_array('read', $hooks)) {
+                        $this->unlockFile($path, ILockingProvider::LOCK_SHARED);
+                    }
+                    throw $e;
+                }
+
+                if ($result !== false && in_array('delete', $hooks)) {
+                    $this->removeUpdate($storage, $internalPath);
+                }
+                if ($result !== false && in_array('write', $hooks, true) && $operation !== 'fopen' && $operation !== 'touch') {
+                    $isCreateOperation = $operation === 'mkdir' || ($operation === 'file_put_contents' && in_array('create', $hooks, true));
+                    $sizeDifference = $operation === 'mkdir' ? 0 : $result;
+                    $this->writeUpdate($storage, $internalPath, null, $isCreateOperation ? $sizeDifference : null);
+                }
+                if ($result !== false && in_array('touch', $hooks)) {
+                    $this->writeUpdate($storage, $internalPath, $extraParam, 0);
+                }
+
+                if ((in_array('write', $hooks) || in_array('delete', $hooks)) && ($operation !== 'fopen' || $result === false)) {
+                    $this->changeLock($path, ILockingProvider::LOCK_SHARED);
+                }
+
+                $unlockLater = false;
+                if ($this->lockingEnabled && $operation === 'fopen' && is_resource($result)) {
+                    $unlockLater = true;
+                    // make sure our unlocking callback will still be called if connection is aborted
+                    ignore_user_abort(true);
+                    $result = CallbackWrapper::wrap($result, null, null, function () use ($hooks, $path) {
+                        if (in_array('write', $hooks)) {
+                            $this->unlockFile($path, ILockingProvider::LOCK_EXCLUSIVE);
+                        } elseif (in_array('read', $hooks)) {
+                            $this->unlockFile($path, ILockingProvider::LOCK_SHARED);
+                        }
+                    });
+                }
+
+                if ($this->shouldEmitHooks($path) && $result !== false) {
+                    if ($operation != 'fopen') { //no post hooks for fopen, the file stream is still open
+                        $this->runHooks($hooks, $path, true);
+                    }
+                }
+
+                if (!$unlockLater
+                    && (in_array('write', $hooks) || in_array('delete', $hooks) || in_array('read', $hooks))
+                ) {
+                    $this->unlockFile($path, ILockingProvider::LOCK_SHARED);
+                }
+                return $result;
+            } else {
+                $this->unlockFile($path, ILockingProvider::LOCK_SHARED);
+            }
+        }
+        return null;
+    }
+
+    /**
+     * get the path relative to the default root for hook usage
+     *
+     * @param string $path
+     * @return ?string
+     */
+    private function getHookPath($path): ?string {
+        $view = Filesystem::getView();
+        if (!$view) {
+            return $path;
+        }
+        return $view->getRelativePath($this->getAbsolutePath($path));
+    }
+
+    private function shouldEmitHooks(string $path = ''): bool {
+        if ($path && Cache\Scanner::isPartialFile($path)) {
+            return false;
+        }
+        if (!Filesystem::$loaded) {
+            return false;
+        }
+        $defaultRoot = Filesystem::getRoot();
+        if ($defaultRoot === null) {
+            return false;
+        }
+        if ($this->fakeRoot === $defaultRoot) {
+            return true;
+        }
+        $fullPath = $this->getAbsolutePath($path);
+
+        if ($fullPath === $defaultRoot) {
+            return true;
+        }
+
+        return (strlen($fullPath) > strlen($defaultRoot)) && (substr($fullPath, 0, strlen($defaultRoot) + 1) === $defaultRoot . '/');
+    }
+
+    /**
+     * @param string[] $hooks
+     * @param string $path
+     * @param bool $post
+     * @return bool
+     */
+    private function runHooks($hooks, $path, $post = false) {
+        $relativePath = $path;
+        $path = $this->getHookPath($path);
+        $prefix = $post ? 'post_' : '';
+        $run = true;
+        if ($this->shouldEmitHooks($relativePath)) {
+            foreach ($hooks as $hook) {
+                if ($hook != 'read') {
+                    \OC_Hook::emit(
+                        Filesystem::CLASSNAME,
+                        $prefix . $hook,
+                        [
+                            Filesystem::signal_param_run => &$run,
+                            Filesystem::signal_param_path => $path
+                        ]
+                    );
+                } elseif (!$post) {
+                    \OC_Hook::emit(
+                        Filesystem::CLASSNAME,
+                        $prefix . $hook,
+                        [
+                            Filesystem::signal_param_path => $path
+                        ]
+                    );
+                }
+            }
+        }
+        return $run;
+    }
+
+    /**
+     * check if a file or folder has been updated since $time
+     *
+     * @param string $path
+     * @param int $time
+     * @return bool
+     */
+    public function hasUpdated($path, $time) {
+        return $this->basicOperation('hasUpdated', $path, [], $time);
+    }
+
+    /**
+     * @param string $ownerId
+     * @return IUser
+     */
+    private function getUserObjectForOwner(string $ownerId) {
+        return new LazyUser($ownerId, $this->userManager);
+    }
+
+    /**
+     * Get file info from cache
+     *
+     * If the file is not in cached it will be scanned
+     * If the file has changed on storage the cache will be updated
+     *
+     * @param Storage $storage
+     * @param string $internalPath
+     * @param string $relativePath
+     * @return ICacheEntry|bool
+     */
+    private function getCacheEntry($storage, $internalPath, $relativePath) {
+        $cache = $storage->getCache($internalPath);
+        $data = $cache->get($internalPath);
+        $watcher = $storage->getWatcher($internalPath);
+
+        try {
+            // if the file is not in the cache or needs to be updated, trigger the scanner and reload the data
+            if (!$data || (isset($data['size']) && $data['size'] === -1)) {
+                if (!$storage->file_exists($internalPath)) {
+                    return false;
+                }
+                // don't need to get a lock here since the scanner does it's own locking
+                $scanner = $storage->getScanner($internalPath);
+                $scanner->scan($internalPath, Cache\Scanner::SCAN_SHALLOW);
+                $data = $cache->get($internalPath);
+            } elseif (!Cache\Scanner::isPartialFile($internalPath) && $watcher->needsUpdate($internalPath, $data)) {
+                $this->lockFile($relativePath, ILockingProvider::LOCK_SHARED);
+                $watcher->update($internalPath, $data);
+                $storage->getPropagator()->propagateChange($internalPath, time());
+                $data = $cache->get($internalPath);
+                $this->unlockFile($relativePath, ILockingProvider::LOCK_SHARED);
+            }
+        } catch (LockedException $e) {
+            // if the file is locked we just use the old cache info
+        }
+
+        return $data;
+    }
+
+    /**
+     * get the filesystem info
+     *
+     * @param string $path
+     * @param bool|string $includeMountPoints true to add mountpoint sizes,
+     *                                        'ext' to add only ext storage mount point sizes. Defaults to true.
+     * @return \OC\Files\FileInfo|false False if file does not exist
+     */
+    public function getFileInfo($path, $includeMountPoints = true) {
+        $this->assertPathLength($path);
+        if (!Filesystem::isValidPath($path)) {
+            return false;
+        }
+        $relativePath = $path;
+        $path = Filesystem::normalizePath($this->fakeRoot . '/' . $path);
+
+        $mount = Filesystem::getMountManager()->find($path);
+        $storage = $mount->getStorage();
+        $internalPath = $mount->getInternalPath($path);
+        if ($storage) {
+            $data = $this->getCacheEntry($storage, $internalPath, $relativePath);
+
+            if (!$data instanceof ICacheEntry) {
+                if (Cache\Scanner::isPartialFile($relativePath)) {
+                    return $this->getPartFileInfo($relativePath);
+                }
+
+                return false;
+            }
+
+            if ($mount instanceof MoveableMount && $internalPath === '') {
+                $data['permissions'] |= \OCP\Constants::PERMISSION_DELETE;
+            }
+            if ($internalPath === '' && $data['name']) {
+                $data['name'] = basename($path);
+            }
+
+            $ownerId = $storage->getOwner($internalPath);
+            $owner = null;
+            if ($ownerId !== false) {
+                // ownerId might be null if files are accessed with an access token without file system access
+                $owner = $this->getUserObjectForOwner($ownerId);
+            }
+            $info = new FileInfo($path, $storage, $internalPath, $data, $mount, $owner);
+
+            if (isset($data['fileid'])) {
+                if ($includeMountPoints && $data['mimetype'] === 'httpd/unix-directory') {
+                    //add the sizes of other mount points to the folder
+                    $extOnly = ($includeMountPoints === 'ext');
+                    $this->addSubMounts($info, $extOnly);
+                }
+            }
+
+            return $info;
+        } else {
+            $this->logger->warning('Storage not valid for mountpoint: ' . $mount->getMountPoint(), ['app' => 'core']);
+        }
+
+        return false;
+    }
+
+    /**
+     * Extend a FileInfo that was previously requested with `$includeMountPoints = false` to include the sub mounts
+     */
+    public function addSubMounts(FileInfo $info, $extOnly = false): void {
+        $mounts = Filesystem::getMountManager()->findIn($info->getPath());
+        $info->setSubMounts(array_filter($mounts, function (IMountPoint $mount) use ($extOnly) {
+            return !($extOnly && $mount instanceof SharedMount);
+        }));
+    }
+
+    /**
+     * get the content of a directory
+     *
+     * @param string $directory path under datadirectory
+     * @param string $mimetype_filter limit returned content to this mimetype or mimepart
+     * @return FileInfo[]
+     */
+    public function getDirectoryContent($directory, $mimetype_filter = '', ?\OCP\Files\FileInfo $directoryInfo = null) {
+        $this->assertPathLength($directory);
+        if (!Filesystem::isValidPath($directory)) {
+            return [];
+        }
+
+        $path = $this->getAbsolutePath($directory);
+        $path = Filesystem::normalizePath($path);
+        $mount = $this->getMount($directory);
+        $storage = $mount->getStorage();
+        $internalPath = $mount->getInternalPath($path);
+        if (!$storage) {
+            return [];
+        }
+
+        $cache = $storage->getCache($internalPath);
+        $user = \OC_User::getUser();
+
+        if (!$directoryInfo) {
+            $data = $this->getCacheEntry($storage, $internalPath, $directory);
+            if (!$data instanceof ICacheEntry || !isset($data['fileid'])) {
+                return [];
+            }
+        } else {
+            $data = $directoryInfo;
+        }
+
+        if (!($data->getPermissions() & Constants::PERMISSION_READ)) {
+            return [];
+        }
+
+        $folderId = $data->getId();
+        $contents = $cache->getFolderContentsById($folderId); //TODO: mimetype_filter
+
+        $sharingDisabled = \OCP\Util::isSharingDisabledForUser();
+
+        $fileNames = array_map(function (ICacheEntry $content) {
+            return $content->getName();
+        }, $contents);
+        /**
+         * @var \OC\Files\FileInfo[] $fileInfos
+         */
+        $fileInfos = array_map(function (ICacheEntry $content) use ($path, $storage, $mount, $sharingDisabled) {
+            if ($sharingDisabled) {
+                $content['permissions'] = $content['permissions'] & ~\OCP\Constants::PERMISSION_SHARE;
+            }
+            $ownerId = $storage->getOwner($content['path']);
+            if ($ownerId !== false) {
+                $owner = $this->getUserObjectForOwner($ownerId);
+            } else {
+                $owner = null;
+            }
+            return new FileInfo($path . '/' . $content['name'], $storage, $content['path'], $content, $mount, $owner);
+        }, $contents);
+        $files = array_combine($fileNames, $fileInfos);
+
+        //add a folder for any mountpoint in this directory and add the sizes of other mountpoints to the folders
+        $mounts = Filesystem::getMountManager()->findIn($path);
+
+        // make sure nested mounts are sorted after their parent mounts
+        // otherwise doesn't propagate the etag across storage boundaries correctly
+        usort($mounts, function (IMountPoint $a, IMountPoint $b) {
+            return $a->getMountPoint() <=> $b->getMountPoint();
+        });
+
+        $dirLength = strlen($path);
+        foreach ($mounts as $mount) {
+            $mountPoint = $mount->getMountPoint();
+            $subStorage = $mount->getStorage();
+            if ($subStorage) {
+                $subCache = $subStorage->getCache('');
+
+                $rootEntry = $subCache->get('');
+                if (!$rootEntry) {
+                    $subScanner = $subStorage->getScanner();
+                    try {
+                        $subScanner->scanFile('');
+                    } catch (\OCP\Files\StorageNotAvailableException $e) {
+                        continue;
+                    } catch (\OCP\Files\StorageInvalidException $e) {
+                        continue;
+                    } catch (\Exception $e) {
+                        // sometimes when the storage is not available it can be any exception
+                        $this->logger->error('Exception while scanning storage "' . $subStorage->getId() . '"', [
+                            'exception' => $e,
+                            'app' => 'core',
+                        ]);
+                        continue;
+                    }
+                    $rootEntry = $subCache->get('');
+                }
+
+                if ($rootEntry && ($rootEntry->getPermissions() & Constants::PERMISSION_READ)) {
+                    $relativePath = trim(substr($mountPoint, $dirLength), '/');
+                    if ($pos = strpos($relativePath, '/')) {
+                        //mountpoint inside subfolder add size to the correct folder
+                        $entryName = substr($relativePath, 0, $pos);
+
+                        // Create parent folders if the mountpoint is inside a subfolder that doesn't exist yet
+                        if (!isset($files[$entryName])) {
+                            try {
+                                [$storage, ] = $this->resolvePath($path . '/' . $entryName);
+                                // make sure we can create the mountpoint folder, even if the user has a quota of 0
+                                if ($storage->instanceOfStorage(Quota::class)) {
+                                    $storage->enableQuota(false);
+                                }
+
+                                if ($this->mkdir($path . '/' . $entryName) !== false) {
+                                    $info = $this->getFileInfo($path . '/' . $entryName);
+                                    if ($info !== false) {
+                                        $files[$entryName] = $info;
+                                    }
+                                }
+
+                                if ($storage->instanceOfStorage(Quota::class)) {
+                                    $storage->enableQuota(true);
+                                }
+                            } catch (\Exception $e) {
+                                // Creating the parent folder might not be possible, for example due to a lack of permissions.
+                                $this->logger->debug('Failed to create non-existent parent', ['exception' => $e, 'path' => $path . '/' . $entryName]);
+                            }
+                        }
+
+                        if (isset($files[$entryName])) {
+                            $files[$entryName]->addSubEntry($rootEntry, $mountPoint);
+                        }
+                    } else { //mountpoint in this folder, add an entry for it
+                        $rootEntry['name'] = $relativePath;
+                        $rootEntry['type'] = $rootEntry['mimetype'] === 'httpd/unix-directory' ? 'dir' : 'file';
+                        $permissions = $rootEntry['permissions'];
+                        // do not allow renaming/deleting the mount point if they are not shared files/folders
+                        // for shared files/folders we use the permissions given by the owner
+                        if ($mount instanceof MoveableMount) {
+                            $rootEntry['permissions'] = $permissions | \OCP\Constants::PERMISSION_UPDATE | \OCP\Constants::PERMISSION_DELETE;
+                        } else {
+                            $rootEntry['permissions'] = $permissions & (\OCP\Constants::PERMISSION_ALL - (\OCP\Constants::PERMISSION_UPDATE | \OCP\Constants::PERMISSION_DELETE));
+                        }
+
+                        $rootEntry['path'] = substr(Filesystem::normalizePath($path . '/' . $rootEntry['name']), strlen($user) + 2); // full path without /$user/
+
+                        // if sharing was disabled for the user we remove the share permissions
+                        if ($sharingDisabled) {
+                            $rootEntry['permissions'] = $rootEntry['permissions'] & ~\OCP\Constants::PERMISSION_SHARE;
+                        }
+
+                        $ownerId = $subStorage->getOwner('');
+                        if ($ownerId !== false) {
+                            $owner = $this->getUserObjectForOwner($ownerId);
+                        } else {
+                            $owner = null;
+                        }
+                        $files[$rootEntry->getName()] = new FileInfo($path . '/' . $rootEntry['name'], $subStorage, '', $rootEntry, $mount, $owner);
+                    }
+                }
+            }
+        }
+
+        if ($mimetype_filter) {
+            $files = array_filter($files, function (FileInfo $file) use ($mimetype_filter) {
+                if (strpos($mimetype_filter, '/')) {
+                    return $file->getMimetype() === $mimetype_filter;
+                } else {
+                    return $file->getMimePart() === $mimetype_filter;
+                }
+            });
+        }
+
+        return array_values($files);
+    }
+
+    /**
+     * change file metadata
+     *
+     * @param string $path
+     * @param array|\OCP\Files\FileInfo $data
+     * @return int
+     *
+     * returns the fileid of the updated file
+     */
+    public function putFileInfo($path, $data) {
+        $this->assertPathLength($path);
+        if ($data instanceof FileInfo) {
+            $data = $data->getData();
+        }
+        $path = Filesystem::normalizePath($this->fakeRoot . '/' . $path);
+        /**
+         * @var Storage $storage
+         * @var string $internalPath
+         */
+        [$storage, $internalPath] = Filesystem::resolvePath($path);
+        if ($storage) {
+            $cache = $storage->getCache($path);
+
+            if (!$cache->inCache($internalPath)) {
+                $scanner = $storage->getScanner($internalPath);
+                $scanner->scan($internalPath, Cache\Scanner::SCAN_SHALLOW);
+            }
+
+            return $cache->put($internalPath, $data);
+        } else {
+            return -1;
+        }
+    }
+
+    /**
+     * search for files with the name matching $query
+     *
+     * @param string $query
+     * @return FileInfo[]
+     */
+    public function search($query) {
+        return $this->searchCommon('search', ['%' . $query . '%']);
+    }
+
+    /**
+     * search for files with the name matching $query
+     *
+     * @param string $query
+     * @return FileInfo[]
+     */
+    public function searchRaw($query) {
+        return $this->searchCommon('search', [$query]);
+    }
+
+    /**
+     * search for files by mimetype
+     *
+     * @param string $mimetype
+     * @return FileInfo[]
+     */
+    public function searchByMime($mimetype) {
+        return $this->searchCommon('searchByMime', [$mimetype]);
+    }
+
+    /**
+     * search for files by tag
+     *
+     * @param string|int $tag name or tag id
+     * @param string $userId owner of the tags
+     * @return FileInfo[]
+     */
+    public function searchByTag($tag, $userId) {
+        return $this->searchCommon('searchByTag', [$tag, $userId]);
+    }
+
+    /**
+     * @param string $method cache method
+     * @param array $args
+     * @return FileInfo[]
+     */
+    private function searchCommon($method, $args) {
+        $files = [];
+        $rootLength = strlen($this->fakeRoot);
+
+        $mount = $this->getMount('');
+        $mountPoint = $mount->getMountPoint();
+        $storage = $mount->getStorage();
+        $userManager = \OC::$server->getUserManager();
+        if ($storage) {
+            $cache = $storage->getCache('');
+
+            $results = call_user_func_array([$cache, $method], $args);
+            foreach ($results as $result) {
+                if (substr($mountPoint . $result['path'], 0, $rootLength + 1) === $this->fakeRoot . '/') {
+                    $internalPath = $result['path'];
+                    $path = $mountPoint . $result['path'];
+                    $result['path'] = substr($mountPoint . $result['path'], $rootLength);
+                    $ownerId = $storage->getOwner($internalPath);
+                    if ($ownerId !== false) {
+                        $owner = $userManager->get($ownerId);
+                    } else {
+                        $owner = null;
+                    }
+                    $files[] = new FileInfo($path, $storage, $internalPath, $result, $mount, $owner);
+                }
+            }
+
+            $mounts = Filesystem::getMountManager()->findIn($this->fakeRoot);
+            foreach ($mounts as $mount) {
+                $mountPoint = $mount->getMountPoint();
+                $storage = $mount->getStorage();
+                if ($storage) {
+                    $cache = $storage->getCache('');
+
+                    $relativeMountPoint = substr($mountPoint, $rootLength);
+                    $results = call_user_func_array([$cache, $method], $args);
+                    if ($results) {
+                        foreach ($results as $result) {
+                            $internalPath = $result['path'];
+                            $result['path'] = rtrim($relativeMountPoint . $result['path'], '/');
+                            $path = rtrim($mountPoint . $internalPath, '/');
+                            $ownerId = $storage->getOwner($internalPath);
+                            if ($ownerId !== false) {
+                                $owner = $userManager->get($ownerId);
+                            } else {
+                                $owner = null;
+                            }
+                            $files[] = new FileInfo($path, $storage, $internalPath, $result, $mount, $owner);
+                        }
+                    }
+                }
+            }
+        }
+        return $files;
+    }
+
+    /**
+     * Get the owner for a file or folder
+     *
+     * @throws NotFoundException
+     */
+    public function getOwner(string $path): string {
+        $info = $this->getFileInfo($path);
+        if (!$info) {
+            throw new NotFoundException($path . ' not found while trying to get owner');
+        }
+
+        if ($info->getOwner() === null) {
+            throw new NotFoundException($path . ' has no owner');
+        }
+
+        return $info->getOwner()->getUID();
+    }
+
+    /**
+     * get the ETag for a file or folder
+     *
+     * @param string $path
+     * @return string|false
+     */
+    public function getETag($path) {
+        [$storage, $internalPath] = $this->resolvePath($path);
+        if ($storage) {
+            return $storage->getETag($internalPath);
+        } else {
+            return false;
+        }
+    }
+
+    /**
+     * Get the path of a file by id, relative to the view
+     *
+     * Note that the resulting path is not guaranteed to be unique for the id, multiple paths can point to the same file
+     *
+     * @param int $id
+     * @param int|null $storageId
+     * @return string
+     * @throws NotFoundException
+     */
+    public function getPath($id, ?int $storageId = null): string {
+        $id = (int)$id;
+        $rootFolder = Server::get(Files\IRootFolder::class);
+
+        $node = $rootFolder->getFirstNodeByIdInPath($id, $this->getRoot());
+        if ($node) {
+            if ($storageId === null || $storageId === $node->getStorage()->getCache()->getNumericStorageId()) {
+                return $this->getRelativePath($node->getPath()) ?? '';
+            }
+        } else {
+            throw new NotFoundException(sprintf('File with id "%s" has not been found.', $id));
+        }
+
+        foreach ($rootFolder->getByIdInPath($id, $this->getRoot()) as $node) {
+            if ($storageId === $node->getStorage()->getCache()->getNumericStorageId()) {
+                return $this->getRelativePath($node->getPath()) ?? '';
+            }
+        }
+
+        throw new NotFoundException(sprintf('File with id "%s" has not been found.', $id));
+    }
+
+    /**
+     * @param string $path
+     * @throws InvalidPathException
+     */
+    private function assertPathLength($path): void {
+        $maxLen = min(PHP_MAXPATHLEN, 4000);
+        // Check for the string length - performed using isset() instead of strlen()
+        // because isset() is about 5x-40x faster.
+        if (isset($path[$maxLen])) {
+            $pathLen = strlen($path);
+            throw new InvalidPathException("Path length($pathLen) exceeds max path length($maxLen): $path");
+        }
+    }
+
+    /**
+     * check if it is allowed to move a mount point to a given target.
+     * It is not allowed to move a mount point into a different mount point or
+     * into an already shared folder
+     */
+    private function targetIsNotShared(string $user, string $targetPath): bool {
+        $providers = [
+            IShare::TYPE_USER,
+            IShare::TYPE_GROUP,
+            IShare::TYPE_EMAIL,
+            IShare::TYPE_CIRCLE,
+            IShare::TYPE_ROOM,
+            IShare::TYPE_DECK,
+            IShare::TYPE_SCIENCEMESH
+        ];
+        $shareManager = Server::get(IManager::class);
+        /** @var IShare[] $shares */
+        $shares = array_merge(...array_map(function (int $type) use ($shareManager, $user) {
+            return $shareManager->getSharesBy($user, $type);
+        }, $providers));
+
+        foreach ($shares as $share) {
+            try {
+                $sharedPath = $share->getNode()->getPath();
+            } catch (NotFoundException $e) {
+                // node is not found, ignoring
+                $this->logger->debug(
+                    'Could not find the node linked to a share',
+                    ['app' => 'files', 'exception' => $e]);
+                continue;
+            }
+            if ($targetPath === $sharedPath || str_starts_with($targetPath, $sharedPath . '/')) {
+                $this->logger->debug(
+                    'It is not allowed to move one mount point into a shared folder',
+                    ['app' => 'files']);
+                return false;
+            }
+        }
+
+        return true;
+    }
+
+    /**
+     * Get a fileinfo object for files that are ignored in the cache (part files)
+     */
+    private function getPartFileInfo(string $path): \OC\Files\FileInfo {
+        $mount = $this->getMount($path);
+        $storage = $mount->getStorage();
+        $internalPath = $mount->getInternalPath($this->getAbsolutePath($path));
+        $ownerId = $storage->getOwner($internalPath);
+        if ($ownerId !== false) {
+            $owner = Server::get(IUserManager::class)->get($ownerId);
+        } else {
+            $owner = null;
+        }
+        return new FileInfo(
+            $this->getAbsolutePath($path),
+            $storage,
+            $internalPath,
+            [
+                'fileid' => null,
+                'mimetype' => $storage->getMimeType($internalPath),
+                'name' => basename($path),
+                'etag' => null,
+                'size' => $storage->filesize($internalPath),
+                'mtime' => $storage->filemtime($internalPath),
+                'encrypted' => false,
+                'permissions' => \OCP\Constants::PERMISSION_ALL
+            ],
+            $mount,
+            $owner
+        );
+    }
+
+    /**
+     * @param string $path
+     * @param string $fileName
+     * @param bool $readonly Check only if the path is allowed for read-only access
+     * @throws InvalidPathException
+     */
+    public function verifyPath($path, $fileName, $readonly = false): void {
+        // All of the view's functions disallow '..' in the path so we can short cut if the path is invalid
+        if (!Filesystem::isValidPath($path ?: '/')) {
+            $l = \OCP\Util::getL10N('lib');
+            throw new InvalidPathException($l->t('Path contains invalid segments'));
+        }
+
+        // Short cut for read-only validation
+        if ($readonly) {
+            $validator = Server::get(FilenameValidator::class);
+            if ($validator->isForbidden($fileName)) {
+                $l = \OCP\Util::getL10N('lib');
+                throw new InvalidPathException($l->t('Filename is a reserved word'));
+            }
+            return;
+        }
+
+        try {
+            /** @type \OCP\Files\Storage $storage */
+            [$storage, $internalPath] = $this->resolvePath($path);
+            $storage->verifyPath($internalPath, $fileName);
+        } catch (ReservedWordException $ex) {
+            $l = \OCP\Util::getL10N('lib');
+            throw new InvalidPathException($ex->getMessage() ?: $l->t('Filename is a reserved word'));
+        } catch (InvalidCharacterInPathException $ex) {
+            $l = \OCP\Util::getL10N('lib');
+            throw new InvalidPathException($ex->getMessage() ?: $l->t('Filename contains at least one invalid character'));
+        } catch (FileNameTooLongException $ex) {
+            $l = \OCP\Util::getL10N('lib');
+            throw new InvalidPathException($l->t('Filename is too long'));
+        } catch (InvalidDirectoryException $ex) {
+            $l = \OCP\Util::getL10N('lib');
+            throw new InvalidPathException($l->t('Dot files are not allowed'));
+        } catch (EmptyFileNameException $ex) {
+            $l = \OCP\Util::getL10N('lib');
+            throw new InvalidPathException($l->t('Empty filename is not allowed'));
+        }
+    }
+
+    /**
+     * get all parent folders of $path
+     *
+     * @param string $path
+     * @return string[]
+     */
+    private function getParents($path) {
+        $path = trim($path, '/');
+        if (!$path) {
+            return [];
+        }
+
+        $parts = explode('/', $path);
+
+        // remove the single file
+        array_pop($parts);
+        $result = ['/'];
+        $resultPath = '';
+        foreach ($parts as $part) {
+            if ($part) {
+                $resultPath .= '/' . $part;
+                $result[] = $resultPath;
+            }
+        }
+        return $result;
+    }
+
+    /**
+     * Returns the mount point for which to lock
+     *
+     * @param string $absolutePath absolute path
+     * @param bool $useParentMount true to return parent mount instead of whatever
+     *                             is mounted directly on the given path, false otherwise
+     * @return IMountPoint mount point for which to apply locks
+     */
+    private function getMountForLock(string $absolutePath, bool $useParentMount = false): IMountPoint {
+        $mount = Filesystem::getMountManager()->find($absolutePath);
+
+        if ($useParentMount) {
+            // find out if something is mounted directly on the path
+            $internalPath = $mount->getInternalPath($absolutePath);
+            if ($internalPath === '') {
+                // resolve the parent mount instead
+                $mount = Filesystem::getMountManager()->find(dirname($absolutePath));
+            }
+        }
+
+        return $mount;
+    }
+
+    /**
+     * Lock the given path
+     *
+     * @param string $path the path of the file to lock, relative to the view
+     * @param int $type \OCP\Lock\ILockingProvider::LOCK_SHARED or \OCP\Lock\ILockingProvider::LOCK_EXCLUSIVE
+     * @param bool $lockMountPoint true to lock the mount point, false to lock the attached mount/storage
+     *
+     * @return bool False if the path is excluded from locking, true otherwise
+     * @throws LockedException if the path is already locked
+     */
+    private function lockPath($path, $type, $lockMountPoint = false) {
+        $absolutePath = $this->getAbsolutePath($path);
+        $absolutePath = Filesystem::normalizePath($absolutePath);
+        if (!$this->shouldLockFile($absolutePath)) {
+            return false;
+        }
+
+        $mount = $this->getMountForLock($absolutePath, $lockMountPoint);
+        try {
+            $storage = $mount->getStorage();
+            if ($storage && $storage->instanceOfStorage('\OCP\Files\Storage\ILockingStorage')) {
+                $storage->acquireLock(
+                    $mount->getInternalPath($absolutePath),
+                    $type,
+                    $this->lockingProvider
+                );
+            }
+        } catch (LockedException $e) {
+            // rethrow with the human-readable path
+            throw new LockedException(
+                $path,
+                $e,
+                $e->getExistingLock()
+            );
+        }
+
+        return true;
+    }
+
+    /**
+     * Change the lock type
+     *
+     * @param string $path the path of the file to lock, relative to the view
+     * @param int $type \OCP\Lock\ILockingProvider::LOCK_SHARED or \OCP\Lock\ILockingProvider::LOCK_EXCLUSIVE
+     * @param bool $lockMountPoint true to lock the mount point, false to lock the attached mount/storage
+     *
+     * @return bool False if the path is excluded from locking, true otherwise
+     * @throws LockedException if the path is already locked
+     */
+    public function changeLock($path, $type, $lockMountPoint = false) {
+        $path = Filesystem::normalizePath($path);
+        $absolutePath = $this->getAbsolutePath($path);
+        $absolutePath = Filesystem::normalizePath($absolutePath);
+        if (!$this->shouldLockFile($absolutePath)) {
+            return false;
+        }
+
+        $mount = $this->getMountForLock($absolutePath, $lockMountPoint);
+        try {
+            $storage = $mount->getStorage();
+            if ($storage && $storage->instanceOfStorage('\OCP\Files\Storage\ILockingStorage')) {
+                $storage->changeLock(
+                    $mount->getInternalPath($absolutePath),
+                    $type,
+                    $this->lockingProvider
+                );
+            }
+        } catch (LockedException $e) {
+            // rethrow with the a human-readable path
+            throw new LockedException(
+                $path,
+                $e,
+                $e->getExistingLock()
+            );
+        }
+
+        return true;
+    }
+
+    /**
+     * Unlock the given path
+     *
+     * @param string $path the path of the file to unlock, relative to the view
+     * @param int $type \OCP\Lock\ILockingProvider::LOCK_SHARED or \OCP\Lock\ILockingProvider::LOCK_EXCLUSIVE
+     * @param bool $lockMountPoint true to lock the mount point, false to lock the attached mount/storage
+     *
+     * @return bool False if the path is excluded from locking, true otherwise
+     * @throws LockedException
+     */
+    private function unlockPath($path, $type, $lockMountPoint = false) {
+        $absolutePath = $this->getAbsolutePath($path);
+        $absolutePath = Filesystem::normalizePath($absolutePath);
+        if (!$this->shouldLockFile($absolutePath)) {
+            return false;
+        }
+
+        $mount = $this->getMountForLock($absolutePath, $lockMountPoint);
+        $storage = $mount->getStorage();
+        if ($storage && $storage->instanceOfStorage('\OCP\Files\Storage\ILockingStorage')) {
+            $storage->releaseLock(
+                $mount->getInternalPath($absolutePath),
+                $type,
+                $this->lockingProvider
+            );
+        }
+
+        return true;
+    }
+
+    /**
+     * Lock a path and all its parents up to the root of the view
+     *
+     * @param string $path the path of the file to lock relative to the view
+     * @param int $type \OCP\Lock\ILockingProvider::LOCK_SHARED or \OCP\Lock\ILockingProvider::LOCK_EXCLUSIVE
+     * @param bool $lockMountPoint true to lock the mount point, false to lock the attached mount/storage
+     *
+     * @return bool False if the path is excluded from locking, true otherwise
+     * @throws LockedException
+     */
+    public function lockFile($path, $type, $lockMountPoint = false) {
+        $absolutePath = $this->getAbsolutePath($path);
+        $absolutePath = Filesystem::normalizePath($absolutePath);
+        if (!$this->shouldLockFile($absolutePath)) {
+            return false;
+        }
+
+        $this->lockPath($path, $type, $lockMountPoint);
+
+        $parents = $this->getParents($path);
+        foreach ($parents as $parent) {
+            $this->lockPath($parent, ILockingProvider::LOCK_SHARED);
+        }
+
+        return true;
+    }
+
+    /**
+     * Unlock a path and all its parents up to the root of the view
+     *
+     * @param string $path the path of the file to lock relative to the view
+     * @param int $type \OCP\Lock\ILockingProvider::LOCK_SHARED or \OCP\Lock\ILockingProvider::LOCK_EXCLUSIVE
+     * @param bool $lockMountPoint true to lock the mount point, false to lock the attached mount/storage
+     *
+     * @return bool False if the path is excluded from locking, true otherwise
+     * @throws LockedException
+     */
+    public function unlockFile($path, $type, $lockMountPoint = false) {
+        $absolutePath = $this->getAbsolutePath($path);
+        $absolutePath = Filesystem::normalizePath($absolutePath);
+        if (!$this->shouldLockFile($absolutePath)) {
+            return false;
+        }
+
+        $this->unlockPath($path, $type, $lockMountPoint);
+
+        $parents = $this->getParents($path);
+        foreach ($parents as $parent) {
+            $this->unlockPath($parent, ILockingProvider::LOCK_SHARED);
+        }
+
+        return true;
+    }
+
+    /**
+     * Only lock files in data/user/files/
+     *
+     * @param string $path Absolute path to the file/folder we try to (un)lock
+     * @return bool
+     */
+    protected function shouldLockFile($path) {
+        $path = Filesystem::normalizePath($path);
+
+        $pathSegments = explode('/', $path);
+        if (isset($pathSegments[2])) {
+            // E.g.: /username/files/path-to-file
+            return ($pathSegments[2] === 'files') && (count($pathSegments) > 3);
+        }
+
+        return !str_starts_with($path, '/appdata_');
+    }
+
+    /**
+     * Shortens the given absolute path to be relative to
+     * "$user/files".
+     *
+     * @param string $absolutePath absolute path which is under "files"
+     *
+     * @return string path relative to "files" with trimmed slashes or null
+     *                if the path was NOT relative to files
+     *
+     * @throws \InvalidArgumentException if the given path was not under "files"
+     * @since 8.1.0
+     */
+    public function getPathRelativeToFiles($absolutePath) {
+        $path = Filesystem::normalizePath($absolutePath);
+        $parts = explode('/', trim($path, '/'), 3);
+        // "$user", "files", "path/to/dir"
+        if (!isset($parts[1]) || $parts[1] !== 'files') {
+            $this->logger->error(
+                '$absolutePath must be relative to "files", value is "{absolutePath}"',
+                [
+                    'absolutePath' => $absolutePath,
+                ]
+            );
+            throw new \InvalidArgumentException('$absolutePath must be relative to "files"');
+        }
+        if (isset($parts[2])) {
+            return $parts[2];
+        }
+        return '';
+    }
+
+    /**
+     * @param string $filename
+     * @return array
+     * @throws \OC\User\NoUserException
+     * @throws NotFoundException
+     */
+    public function getUidAndFilename($filename) {
+        $info = $this->getFileInfo($filename);
+        if (!$info instanceof \OCP\Files\FileInfo) {
+            throw new NotFoundException($this->getAbsolutePath($filename) . ' not found');
+        }
+        $uid = $info->getOwner()->getUID();
+        if ($uid != \OC_User::getUser()) {
+            Filesystem::initMountPoints($uid);
+            $ownerView = new View('/' . $uid . '/files');
+            try {
+                $filename = $ownerView->getPath($info['fileid']);
+            } catch (NotFoundException $e) {
+                throw new NotFoundException('File with id ' . $info['fileid'] . ' not found for user ' . $uid);
+            }
+        }
+        return [$uid, $filename];
+    }
+
+    /**
+     * Creates parent non-existing folders
+     *
+     * @param string $filePath
+     * @return bool
+     */
+    private function createParentDirectories($filePath) {
+        $directoryParts = explode('/', $filePath);
+        $directoryParts = array_filter($directoryParts);
+        foreach ($directoryParts as $key => $part) {
+            $currentPathElements = array_slice($directoryParts, 0, $key);
+            $currentPath = '/' . implode('/', $currentPathElements);
+            if ($this->is_file($currentPath)) {
+                return false;
+            }
+            if (!$this->file_exists($currentPath)) {
+                $this->mkdir($currentPath);
+            }
+        }
+
+        return true;
+    }
 }

Spacing +48 added lines, -48 removed lines

@@ -93,7 +93,7 @@ 
 			return null;
 		}
 		$this->assertPathLength($path);
-		return PathHelper::normalizePath($this->fakeRoot . '/' . $path);
+		return PathHelper::normalizePath($this->fakeRoot.'/'.$path);
 	}
 
 	/**
@@ -104,7 +104,7 @@ 
 	public function chroot($fakeRoot): void {
 		if (!$fakeRoot == '') {
 			if ($fakeRoot[0] !== '/') {
-				$fakeRoot = '/' . $fakeRoot;
+				$fakeRoot = '/'.$fakeRoot;
 			}
 		}
 		$this->fakeRoot = $fakeRoot;
@@ -133,7 +133,7 @@ 
 		}
 
 		// missing slashes can cause wrong matches!
-		$root = rtrim($this->fakeRoot, '/') . '/';
+		$root = rtrim($this->fakeRoot, '/').'/';
 
 		if (!str_starts_with($path, $root)) {
 			return null;
@@ -190,7 +190,7 @@ 
 	 *
 	 * @param string $path
 	 */
-	public function getLocalFile($path): string|false {
+	public function getLocalFile($path): string | false {
 		$parent = substr($path, 0, strrpos($path, '/') ?: 0);
 		$path = $this->getAbsolutePath($path);
 		[$storage, $internalPath] = Filesystem::resolvePath($path);
@@ -220,7 +220,7 @@ 
 		if ($mount instanceof MoveableMount) {
 			// cut of /user/files to get the relative path to data/user/files
 			$pathParts = explode('/', $path, 4);
-			$relPath = '/' . $pathParts[3];
+			$relPath = '/'.$pathParts[3];
 			$this->lockFile($relPath, ILockingProvider::LOCK_SHARED, true);
 			\OC_Hook::emit(
 				Filesystem::CLASSNAME, 'umount',
@@ -664,7 +664,7 @@ 
 		}
 		$postFix = (substr($path, -1) === '/') ? '/' : '';
 		$absolutePath = Filesystem::normalizePath($this->getAbsolutePath($path));
-		$mount = Filesystem::getMountManager()->find($absolutePath . $postFix);
+		$mount = Filesystem::getMountManager()->find($absolutePath.$postFix);
 		if ($mount->getInternalPath($absolutePath) === '') {
 			return $this->removeMount($mount, $absolutePath);
 		}
@@ -707,7 +707,7 @@ 
 		$absolutePath1 = Filesystem::normalizePath($this->getAbsolutePath($source));
 		$absolutePath2 = Filesystem::normalizePath($this->getAbsolutePath($target));
 
-		if (str_starts_with($absolutePath2, $absolutePath1 . '/')) {
+		if (str_starts_with($absolutePath2, $absolutePath1.'/')) {
 			throw new ForbiddenException('Moving a folder into a child folder is forbidden', false);
 		}
 
@@ -1025,7 +1025,7 @@ 
 				$hooks[] = 'write';
 				break;
 			default:
-				$this->logger->error('invalid mode (' . $mode . ') for ' . $path, ['app' => 'core']);
+				$this->logger->error('invalid mode ('.$mode.') for '.$path, ['app' => 'core']);
 		}
 
 		if ($mode !== 'r' && $mode !== 'w') {
@@ -1049,7 +1049,7 @@ 
 	 * @param string $path
 	 * @throws InvalidPathException
 	 */
-	public function toTmpFile($path): string|false {
+	public function toTmpFile($path): string | false {
 		$this->assertPathLength($path);
 		if (Filesystem::isValidPath($path)) {
 			$source = $this->fopen($path, 'r');
@@ -1124,7 +1124,7 @@ 
 	 * @param string $path
 	 * @param bool $raw
 	 */
-	public function hash($type, $path, $raw = false): string|bool {
+	public function hash($type, $path, $raw = false): string | bool {
 		$postFix = (substr($path, -1) === '/') ? '/' : '';
 		$absolutePath = Filesystem::normalizePath($this->getAbsolutePath($path));
 		if (Filesystem::isValidPath($path)) {
@@ -1140,7 +1140,7 @@ 
 				);
 			}
 			/** @var Storage|null $storage */
-			[$storage, $internalPath] = Filesystem::resolvePath($absolutePath . $postFix);
+			[$storage, $internalPath] = Filesystem::resolvePath($absolutePath.$postFix);
 			if ($storage) {
 				return $storage->hash($type, $internalPath, $raw);
 			}
@@ -1190,7 +1190,7 @@ 
 			}
 
 			$run = $this->runHooks($hooks, $path);
-			[$storage, $internalPath] = Filesystem::resolvePath($absolutePath . $postFix);
+			[$storage, $internalPath] = Filesystem::resolvePath($absolutePath.$postFix);
 			if ($run && $storage) {
 				/** @var Storage $storage */
 				if (in_array('write', $hooks) || in_array('delete', $hooks)) {
@@ -1238,7 +1238,7 @@ 
 					$unlockLater = true;
 					// make sure our unlocking callback will still be called if connection is aborted
 					ignore_user_abort(true);
-					$result = CallbackWrapper::wrap($result, null, null, function () use ($hooks, $path) {
+					$result = CallbackWrapper::wrap($result, null, null, function() use ($hooks, $path) {
 						if (in_array('write', $hooks)) {
 							$this->unlockFile($path, ILockingProvider::LOCK_EXCLUSIVE);
 						} elseif (in_array('read', $hooks)) {
@@ -1300,7 +1300,7 @@ 
 			return true;
 		}
 
-		return (strlen($fullPath) > strlen($defaultRoot)) && (substr($fullPath, 0, strlen($defaultRoot) + 1) === $defaultRoot . '/');
+		return (strlen($fullPath) > strlen($defaultRoot)) && (substr($fullPath, 0, strlen($defaultRoot) + 1) === $defaultRoot.'/');
 	}
 
 	/**
@@ -1319,7 +1319,7 @@ 
 				if ($hook != 'read') {
 					\OC_Hook::emit(
 						Filesystem::CLASSNAME,
-						$prefix . $hook,
+						$prefix.$hook,
 						[
 							Filesystem::signal_param_run => &$run,
 							Filesystem::signal_param_path => $path
@@ -1328,7 +1328,7 @@ 
 				} elseif (!$post) {
 					\OC_Hook::emit(
 						Filesystem::CLASSNAME,
-						$prefix . $hook,
+						$prefix.$hook,
 						[
 							Filesystem::signal_param_path => $path
 						]
@@ -1412,7 +1412,7 @@ 
 			return false;
 		}
 		$relativePath = $path;
-		$path = Filesystem::normalizePath($this->fakeRoot . '/' . $path);
+		$path = Filesystem::normalizePath($this->fakeRoot.'/'.$path);
 
 		$mount = Filesystem::getMountManager()->find($path);
 		$storage = $mount->getStorage();
@@ -1453,7 +1453,7 @@ 
 
 			return $info;
 		} else {
-			$this->logger->warning('Storage not valid for mountpoint: ' . $mount->getMountPoint(), ['app' => 'core']);
+			$this->logger->warning('Storage not valid for mountpoint: '.$mount->getMountPoint(), ['app' => 'core']);
 		}
 
 		return false;
@@ -1464,7 +1464,7 @@ 
 	 */
 	public function addSubMounts(FileInfo $info, $extOnly = false): void {
 		$mounts = Filesystem::getMountManager()->findIn($info->getPath());
-		$info->setSubMounts(array_filter($mounts, function (IMountPoint $mount) use ($extOnly) {
+		$info->setSubMounts(array_filter($mounts, function(IMountPoint $mount) use ($extOnly) {
 			return !($extOnly && $mount instanceof SharedMount);
 		}));
 	}
@@ -1512,13 +1512,13 @@ 
 
 		$sharingDisabled = \OCP\Util::isSharingDisabledForUser();
 
-		$fileNames = array_map(function (ICacheEntry $content) {
+		$fileNames = array_map(function(ICacheEntry $content) {
 			return $content->getName();
 		}, $contents);
 		/**
 		 * @var \OC\Files\FileInfo[] $fileInfos
 		 */
-		$fileInfos = array_map(function (ICacheEntry $content) use ($path, $storage, $mount, $sharingDisabled) {
+		$fileInfos = array_map(function(ICacheEntry $content) use ($path, $storage, $mount, $sharingDisabled) {
 			if ($sharingDisabled) {
 				$content['permissions'] = $content['permissions'] & ~\OCP\Constants::PERMISSION_SHARE;
 			}
@@ -1528,7 +1528,7 @@ 
 			} else {
 				$owner = null;
 			}
-			return new FileInfo($path . '/' . $content['name'], $storage, $content['path'], $content, $mount, $owner);
+			return new FileInfo($path.'/'.$content['name'], $storage, $content['path'], $content, $mount, $owner);
 		}, $contents);
 		$files = array_combine($fileNames, $fileInfos);
 
@@ -1537,7 +1537,7 @@ 
 
 		// make sure nested mounts are sorted after their parent mounts
 		// otherwise doesn't propagate the etag across storage boundaries correctly
-		usort($mounts, function (IMountPoint $a, IMountPoint $b) {
+		usort($mounts, function(IMountPoint $a, IMountPoint $b) {
 			return $a->getMountPoint() <=> $b->getMountPoint();
 		});
 
@@ -1559,7 +1559,7 @@ 
 						continue;
 					} catch (\Exception $e) {
 						// sometimes when the storage is not available it can be any exception
-						$this->logger->error('Exception while scanning storage "' . $subStorage->getId() . '"', [
+						$this->logger->error('Exception while scanning storage "'.$subStorage->getId().'"', [
 							'exception' => $e,
 							'app' => 'core',
 						]);
@@ -1577,14 +1577,14 @@ 
 						// Create parent folders if the mountpoint is inside a subfolder that doesn't exist yet
 						if (!isset($files[$entryName])) {
 							try {
-								[$storage, ] = $this->resolvePath($path . '/' . $entryName);
+								[$storage, ] = $this->resolvePath($path.'/'.$entryName);
 								// make sure we can create the mountpoint folder, even if the user has a quota of 0
 								if ($storage->instanceOfStorage(Quota::class)) {
 									$storage->enableQuota(false);
 								}
 
-								if ($this->mkdir($path . '/' . $entryName) !== false) {
-									$info = $this->getFileInfo($path . '/' . $entryName);
+								if ($this->mkdir($path.'/'.$entryName) !== false) {
+									$info = $this->getFileInfo($path.'/'.$entryName);
 									if ($info !== false) {
 										$files[$entryName] = $info;
 									}
@@ -1595,7 +1595,7 @@ 
 								}
 							} catch (\Exception $e) {
 								// Creating the parent folder might not be possible, for example due to a lack of permissions.
-								$this->logger->debug('Failed to create non-existent parent', ['exception' => $e, 'path' => $path . '/' . $entryName]);
+								$this->logger->debug('Failed to create non-existent parent', ['exception' => $e, 'path' => $path.'/'.$entryName]);
 							}
 						}
 
@@ -1614,7 +1614,7 @@ 
 							$rootEntry['permissions'] = $permissions & (\OCP\Constants::PERMISSION_ALL - (\OCP\Constants::PERMISSION_UPDATE | \OCP\Constants::PERMISSION_DELETE));
 						}
 
-						$rootEntry['path'] = substr(Filesystem::normalizePath($path . '/' . $rootEntry['name']), strlen($user) + 2); // full path without /$user/
+						$rootEntry['path'] = substr(Filesystem::normalizePath($path.'/'.$rootEntry['name']), strlen($user) + 2); // full path without /$user/
 
 						// if sharing was disabled for the user we remove the share permissions
 						if ($sharingDisabled) {
@@ -1627,14 +1627,14 @@ 
 						} else {
 							$owner = null;
 						}
-						$files[$rootEntry->getName()] = new FileInfo($path . '/' . $rootEntry['name'], $subStorage, '', $rootEntry, $mount, $owner);
+						$files[$rootEntry->getName()] = new FileInfo($path.'/'.$rootEntry['name'], $subStorage, '', $rootEntry, $mount, $owner);
 					}
 				}
 			}
 		}
 
 		if ($mimetype_filter) {
-			$files = array_filter($files, function (FileInfo $file) use ($mimetype_filter) {
+			$files = array_filter($files, function(FileInfo $file) use ($mimetype_filter) {
 				if (strpos($mimetype_filter, '/')) {
 					return $file->getMimetype() === $mimetype_filter;
 				} else {
@@ -1660,7 +1660,7 @@ 
 		if ($data instanceof FileInfo) {
 			$data = $data->getData();
 		}
-		$path = Filesystem::normalizePath($this->fakeRoot . '/' . $path);
+		$path = Filesystem::normalizePath($this->fakeRoot.'/'.$path);
 		/**
 		 * @var Storage $storage
 		 * @var string $internalPath
@@ -1687,7 +1687,7 @@ 
 	 * @return FileInfo[]
 	 */
 	public function search($query) {
-		return $this->searchCommon('search', ['%' . $query . '%']);
+		return $this->searchCommon('search', ['%'.$query.'%']);
 	}
 
 	/**
@@ -1739,10 +1739,10 @@ 
 
 			$results = call_user_func_array([$cache, $method], $args);
 			foreach ($results as $result) {
-				if (substr($mountPoint . $result['path'], 0, $rootLength + 1) === $this->fakeRoot . '/') {
+				if (substr($mountPoint.$result['path'], 0, $rootLength + 1) === $this->fakeRoot.'/') {
 					$internalPath = $result['path'];
-					$path = $mountPoint . $result['path'];
-					$result['path'] = substr($mountPoint . $result['path'], $rootLength);
+					$path = $mountPoint.$result['path'];
+					$result['path'] = substr($mountPoint.$result['path'], $rootLength);
 					$ownerId = $storage->getOwner($internalPath);
 					if ($ownerId !== false) {
 						$owner = $userManager->get($ownerId);
@@ -1765,8 +1765,8 @@ 
 					if ($results) {
 						foreach ($results as $result) {
 							$internalPath = $result['path'];
-							$result['path'] = rtrim($relativeMountPoint . $result['path'], '/');
-							$path = rtrim($mountPoint . $internalPath, '/');
+							$result['path'] = rtrim($relativeMountPoint.$result['path'], '/');
+							$path = rtrim($mountPoint.$internalPath, '/');
 							$ownerId = $storage->getOwner($internalPath);
 							if ($ownerId !== false) {
 								$owner = $userManager->get($ownerId);
@@ -1790,11 +1790,11 @@ 
 	public function getOwner(string $path): string {
 		$info = $this->getFileInfo($path);
 		if (!$info) {
-			throw new NotFoundException($path . ' not found while trying to get owner');
+			throw new NotFoundException($path.' not found while trying to get owner');
 		}
 
 		if ($info->getOwner() === null) {
-			throw new NotFoundException($path . ' has no owner');
+			throw new NotFoundException($path.' has no owner');
 		}
 
 		return $info->getOwner()->getUID();
@@ -1826,7 +1826,7 @@ 
 	 * @throws NotFoundException
 	 */
 	public function getPath($id, ?int $storageId = null): string {
-		$id = (int)$id;
+		$id = (int) $id;
 		$rootFolder = Server::get(Files\IRootFolder::class);
 
 		$node = $rootFolder->getFirstNodeByIdInPath($id, $this->getRoot());
@@ -1878,7 +1878,7 @@ 
 		];
 		$shareManager = Server::get(IManager::class);
 		/** @var IShare[] $shares */
-		$shares = array_merge(...array_map(function (int $type) use ($shareManager, $user) {
+		$shares = array_merge(...array_map(function(int $type) use ($shareManager, $user) {
 			return $shareManager->getSharesBy($user, $type);
 		}, $providers));
 
@@ -1892,7 +1892,7 @@ 
 					['app' => 'files', 'exception' => $e]);
 				continue;
 			}
-			if ($targetPath === $sharedPath || str_starts_with($targetPath, $sharedPath . '/')) {
+			if ($targetPath === $sharedPath || str_starts_with($targetPath, $sharedPath.'/')) {
 				$this->logger->debug(
 					'It is not allowed to move one mount point into a shared folder',
 					['app' => 'files']);
@@ -2000,7 +2000,7 @@ 
 		$resultPath = '';
 		foreach ($parts as $part) {
 			if ($part) {
-				$resultPath .= '/' . $part;
+				$resultPath .= '/'.$part;
 				$result[] = $resultPath;
 			}
 		}
@@ -2251,16 +2251,16 @@ 
 	public function getUidAndFilename($filename) {
 		$info = $this->getFileInfo($filename);
 		if (!$info instanceof \OCP\Files\FileInfo) {
-			throw new NotFoundException($this->getAbsolutePath($filename) . ' not found');
+			throw new NotFoundException($this->getAbsolutePath($filename).' not found');
 		}
 		$uid = $info->getOwner()->getUID();
 		if ($uid != \OC_User::getUser()) {
 			Filesystem::initMountPoints($uid);
-			$ownerView = new View('/' . $uid . '/files');
+			$ownerView = new View('/'.$uid.'/files');
 			try {
 				$filename = $ownerView->getPath($info['fileid']);
 			} catch (NotFoundException $e) {
-				throw new NotFoundException('File with id ' . $info['fileid'] . ' not found for user ' . $uid);
+				throw new NotFoundException('File with id '.$info['fileid'].' not found for user '.$uid);
 			}
 		}
 		return [$uid, $filename];
@@ -2277,7 +2277,7 @@ 
 		$directoryParts = array_filter($directoryParts);
 		foreach ($directoryParts as $key => $part) {
 			$currentPathElements = array_slice($directoryParts, 0, $key);
-			$currentPath = '/' . implode('/', $currentPathElements);
+			$currentPath = '/'.implode('/', $currentPathElements);
 			if ($this->is_file($currentPath)) {
 				return false;
 			}