debug: add more logging around null paths with jails

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

lib/private/Files/Cache/Wrapper/CacheJail.php

@@ -92,7 +92,11 @@ class CacheJail extends CacheWrapper {
 
 	protected function formatCacheEntry($entry) {
 		if (isset($entry['path'])) {
-			$entry['path'] = $this->getJailedPath($entry['path']);
+			$sourcePath = $entry['path'];
+			$entry['path'] = $this->getJailedPath($sourcePath);
+			if (is_null($entry['path'])) {
+				$this->logger->error("'$sourcePath' is not inside jail path {$this->root}", ['entry' => $entry]);
+			}
 		}
 		return $entry;
 	}

lib/private/Files/Cache/Wrapper/CacheWrapper.php

@@ -27,6 +27,7 @@ class CacheWrapper extends Cache {
 			$this->mimetypeLoader = $cache->mimetypeLoader;
 			$this->connection = $cache->connection;
 			$this->querySearchHelper = $cache->querySearchHelper;
+			$this->logger = $cache->logger;
 		} else {
 			if (!$dependencies) {
 				$dependencies = Server::get(CacheDependencies::class);
@@ -34,6 +35,7 @@ class CacheWrapper extends Cache {
 			$this->mimetypeLoader = $dependencies->getMimeTypeLoader();
 			$this->connection = $dependencies->getConnection();
 			$this->querySearchHelper = $dependencies->getQuerySearchHelper();
+			$this->logger = $dependencies->getLogger();
 		}
 	}
 

lib/private/Files/View.php

@@ -1527,6 +1527,9 @@ class View {
 			if ($sharingDisabled) {
 				$content['permissions'] = $content['permissions'] & ~\OCP\Constants::PERMISSION_SHARE;
 			}
+			if (is_null($content['path'])) {
+				throw new \Exception('Directory listing of "' . $path . '" contains item with null path (' . $content['fileid'] . ')');
+			}
 			$ownerId = $storage->getOwner($content['path']);
 			if ($ownerId !== false) {
 				$owner = $this->getUserObjectForOwner($ownerId);