all: Make scanning ownership opt-in (#8497)

lib/model/folder.go

@@ -646,6 +646,7 @@ func (f *folder) scanSubdirsChangedAndNew(subDirs []string, batch *scanBatch) (i
 		LocalFlags:            f.localFlags,
 		ModTimeWindow:         f.modTimeWindow,
 		EventLogger:           f.evLogger,
+		ScanOwnership:         f.ScanOwnership || f.SyncOwnership,
 	}
 	var fchan chan scanner.ScanResult
 	if f.Type == config.FolderTypeReceiveEncrypted {

lib/model/folder_sendrecv.go

@@ -989,7 +989,7 @@ func (f *sendReceiveFolder) renameFile(cur, source, target protocol.FileInfo, sn
 		err = errModified
 	default:
 		var fi protocol.FileInfo
-		if fi, err = scanner.CreateFileInfo(stat, target.Name, f.mtimefs); err == nil {
+		if fi, err = scanner.CreateFileInfo(stat, target.Name, f.mtimefs, f.SyncOwnership); err == nil {
 			if !fi.IsEquivalentOptional(curTarget, protocol.FileInfoComparison{
 				ModTimeWindow:   f.modTimeWindow,
 				IgnorePerms:     f.IgnorePerms,
@@ -1977,7 +1977,7 @@ func (f *sendReceiveFolder) deleteDirOnDiskHandleChildren(dir string, snap *db.S
 			hasReceiveOnlyChanged = true
 			return nil
 		}
-		diskFile, err := scanner.CreateFileInfo(info, path, f.mtimefs)
+		diskFile, err := scanner.CreateFileInfo(info, path, f.mtimefs, f.SyncOwnership)
 		if err != nil {
 			// Lets just assume the file has changed.
 			scanChan <- path
@@ -2054,7 +2054,7 @@ func (f *sendReceiveFolder) scanIfItemChanged(name string, stat fs.FileInfo, ite
 	// to the database. If there's a mismatch here, there might be local
 	// changes that we don't know about yet and we should scan before
 	// touching the item.
-	statItem, err := scanner.CreateFileInfo(stat, item.Name, f.mtimefs)
+	statItem, err := scanner.CreateFileInfo(stat, item.Name, f.mtimefs, f.SyncOwnership)
 	if err != nil {
 		return errors.Wrap(err, "comparing item on disk to db")
 	}

lib/model/folder_sendrecv_test.go

@@ -83,7 +83,7 @@ func createEmptyFileInfo(t *testing.T, name string, fs fs.Filesystem) protocol.F
 	writeFile(t, fs, name, nil)
 	fi, err := fs.Stat(name)
 	must(t, err)
-	file, err := scanner.CreateFileInfo(fi, name, fs)
+	file, err := scanner.CreateFileInfo(fi, name, fs, false)
 	must(t, err)
 	return file
 }
@@ -777,7 +777,7 @@ func TestDeleteIgnorePerms(t *testing.T) {
 
 	stat, err := file.Stat()
 	must(t, err)
-	fi, err := scanner.CreateFileInfo(stat, name, ffs)
+	fi, err := scanner.CreateFileInfo(stat, name, ffs, false)
 	must(t, err)
 	ffs.Chmod(name, 0600)
 	scanChan := make(chan string, 1)