Merge pull request #26399 from owncloud/stable9.1-userssetup-check-order

[stable9.1] Fix initMountPoints to set usersSetup earlier

lib/private/Files/Filesystem.php

@@ -394,26 +394,36 @@ public static function initMountPoints($user = '') {
 			throw new \OC\User\NoUserException('Attempted to initialize mount points for null user and no user in session');
 		}
 
+		if (isset(self::$usersSetup[$user])) {
+			return;
+		}
+
+		self::$usersSetup[$user] = true;
+
 		$userManager = \OC::$server->getUserManager();
 		$userObject = $userManager->get($user);
 
 		if (is_null($userObject)) {
 			\OCP\Util::writeLog('files', ' Backends provided no user object for ' . $user, \OCP\Util::ERROR);
+			// reset flag, this will make it possible to rethrow the exception if called again
+			unset(self::$usersSetup[$user]);
 			throw new \OC\User\NoUserException('Backends provided no user object for ' . $user);
 		}
 
+		$realUid = $userObject->getUID();
 		// workaround in case of different casings
-		if ($user !== $userObject->getUID()) {
+		if ($user !== $realUid) {
 			$stack = json_encode(debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS, 50));
-			\OCP\Util::writeLog('files', 'initMountPoints() called with wrong user casing. This could be a bug. Expected: "' . $userObject->getUID() . '" got "' . $user . '". Stack: ' . $stack, \OCP\Util::WARN);
-		}
-		$user = $userObject->getUID();
+			\OCP\Util::writeLog('files', 'initMountPoints() called with wrong user casing. This could be a bug. Expected: "' . $realUid . '" got "' . $user . '". Stack: ' . $stack, \OCP\Util::WARN);
+			$user = $realUid;
 
-		if (isset(self::$usersSetup[$user])) {
-			return;
-		}
+			// again with the correct casing
+			if (isset(self::$usersSetup[$user])) {
+				return;
+			}
 
-		self::$usersSetup[$user] = true;
+			self::$usersSetup[$user] = true;
+		}
 
 		/** @var \OC\Files\Config\MountProviderCollection $mountConfigManager */
 		$mountConfigManager = \OC::$server->getMountProviderCollection();