fix: explicitly ignore nested mounts when transfering ownership

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

apps/dav/tests/unit/Connector/Sabre/DirectoryTest.php

@@ -41,7 +41,7 @@ class TestViewDirectory extends \OC\Files\View {
 		return $this->deletables[$path];
 	}
 
-	public function rename($path1, $path2) {
+	public function rename($path1, $path2, array $options = []) {
 		return $this->canRename;
 	}
 

apps/files/lib/Service/OwnershipTransferService.php

@@ -397,7 +397,7 @@ class OwnershipTransferService {
 			$view->mkdir($finalTarget);
 			$finalTarget = $finalTarget . '/' . basename($sourcePath);
 		}
-		if ($view->rename($sourcePath, $finalTarget) === false) {
+		if ($view->rename($sourcePath, $finalTarget, ['checkSubMounts' => false]) === false) {
 			throw new TransferOwnershipException("Could not transfer files.", 1);
 		}
 		if (!is_dir("$sourceUid/files")) {

build/integration/files_features/transfer-ownership.feature

@@ -514,7 +514,7 @@ Feature: transfer-ownership
 		And user "user2" accepts last share
 		When transferring ownership of path "test" from "user0" to "user1"
 		Then the command failed with exit code 1
-		And the command output contains the text "Could not transfer files."
+		And the command error output contains the text "Moving a storage (user0/files/test) into another storage (user1) is not allowed"
 
 	Scenario: transferring ownership does not transfer received shares
 		Given user "user0" exists

lib/private/Files/View.php

@@ -693,11 +693,14 @@ class View {
 	 *
 	 * @param string $source source path
 	 * @param string $target target path
+	 * @param array $options
 	 *
 	 * @return bool|mixed
 	 * @throws LockedException
 	 */
-	public function rename($source, $target) {
+	public function rename($source, $target, array $options = []) {
+		$checkSubMounts = $options['checkSubMounts'] ?? true;
+
 		$absolutePath1 = Filesystem::normalizePath($this->getAbsolutePath($source));
 		$absolutePath2 = Filesystem::normalizePath($this->getAbsolutePath($target));
 
@@ -765,13 +768,16 @@ class View {
 					try {
 						$this->changeLock($target, ILockingProvider::LOCK_EXCLUSIVE, true);
 
-						$movedMounts = $mountManager->findIn($this->getAbsolutePath($source));
+						if ($checkSubMounts) {
+							$movedMounts = $mountManager->findIn($this->getAbsolutePath($source));
+						} else {
+							$movedMounts = [];
+						}
 
 						if ($internalPath1 === '') {
 							$sourceParentMount = $this->getMount(dirname($source));
 							$movedMounts[] = $mount1;
 							$this->validateMountMove($movedMounts, $sourceParentMount, $mount2, !$this->targetIsNotShared($targetUser, $absolutePath2));
-
 							/**
 							 * @var \OC\Files\Mount\MountPoint | \OC\Files\Mount\MoveableMount $mount1
 							 */