additional debug logging on smb copy/rename failures

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

apps/files_external/lib/Lib/Storage/SMB.php

@@ -52,6 +52,7 @@ use OCP\Files\Notify\IChange;
 use OCP\Files\Notify\IRenameChange;
 use OCP\Files\Storage\INotifyStorage;
 use OCP\Files\StorageNotAvailableException;
+use OCP\Util;
 
 class SMB extends Common implements INotifyStorage {
 	/**
@@ -199,6 +200,7 @@ class SMB extends Common implements INotifyStorage {
 			$this->remove($target);
 			$result = $this->share->rename($absoluteSource, $absoluteTarget);
 		} catch (\Exception $e) {
+			\OC::$server->getLogger()->logException($e, ['level' => Util::WARN]);
 			return false;
 		}
 		unset($this->statCache[$absoluteSource], $this->statCache[$absoluteTarget]);

lib/private/Files/Storage/Common.php

@@ -229,6 +229,9 @@ abstract class Common implements Storage, ILockingStorage {
 			$source = $this->fopen($path1, 'r');
 			$target = $this->fopen($path2, 'w');
 			list(, $result) = \OC_Helper::streamCopy($source, $target);
+			if (!$result) {
+				\OC::$server->getLogger()->warning("Failed to write data while copying $path1 to $path2");
+			}
 			$this->removeCachedFile($path2);
 			return $result;
 		}