update hasUpdated description, overwrtie testStat for objectstore test

2 files changed, 7 insertions, 2 deletions

diff --git a/lib/private/files/objectstore/objectstorestorage.php b/lib/private/files/objectstore/objectstorestorage.php
index 4bc258a5807..09114d26de9 100644
--- a/lib/private/files/objectstore/objectstorestorage.php
+++ b/lib/private/files/objectstore/objectstorestorage.php
@@ -407,11 +407,11 @@ class ObjectStoreStorage extends \OC\Files\Storage\Common {
 	}
 
 	/**
-	 * external changes are not supported
+	 * external changes are not supported, exclusive access to the object storage is assumed
 	 *
 	 * @param string $path
 	 * @param int $time
-	 * @return bool
+	 * @return false
 	 */
 	public function hasUpdated($path, $time) {
 		return false;
diff --git a/lib/private/files/storage/common.php b/lib/private/files/storage/common.php
index ecc75298b66..9657b511f15 100644
--- a/lib/private/files/storage/common.php
+++ b/lib/private/files/storage/common.php
@@ -279,6 +279,11 @@ abstract class Common implements \OC\Files\Storage\Storage {
 	/**
 	 * check if a file or folder has been updated since $time
 	 *
+	 * The method is only used to check if the cache needs to be updated. Storage backends that don't support checking
+	 * the mtime should always return false here. As a result storage implementations that always return false expect
+	 * exclusive access to the backend and will not pick up files that have been added in a way that circumvents
+	 * ownClouds filesystem.
+	 *
 	 * @param string $path
 	 * @param int $time
 	 * @return bool