rename, fix wrong logic.

weed/shell/command_remote_mount.go

@@ -234,6 +234,16 @@ func (c *commandRemoteMount) saveMountMapping(commandEnv *CommandEnv, writer io.
 	return nil
 }
 
+// if an entry has synchronized metadata but has not synchronized content
+//    entry.Attributes.FileSize == entry.RemoteEntry.RemoteSize
+//    entry.Attributes.Mtime    == entry.RemoteEntry.RemoteMtime
+//    entry.RemoteEntry.LastLocalSyncTsNs == 0
+// if an entry has synchronized metadata but has synchronized content before
+//    entry.Attributes.FileSize == entry.RemoteEntry.RemoteSize
+//    entry.Attributes.Mtime    == entry.RemoteEntry.RemoteMtime
+//    entry.RemoteEntry.LastLocalSyncTsNs > 0
+// if an entry has synchronized metadata but has new updates
+//    entry.Attributes.Mtime * 1,000,000,000    > entry.RemoteEntry.LastLocalSyncTsNs
 func doSaveRemoteEntry(client filer_pb.SeaweedFilerClient, localDir string, existingEntry *filer_pb.Entry, remoteEntry *filer_pb.RemoteEntry) error {
 	existingEntry.RemoteEntry = remoteEntry
 	existingEntry.Attributes.FileSize = uint64(remoteEntry.RemoteSize)