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-rw-r--r--lib/private/files/storage/common.php5
1 files changed, 5 insertions, 0 deletions
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