On Wednesday May 16, sfrench@xxxxxxxxxx wrote: > Any ideas what are the minimum export operation(s) that cifs would need to > add to export under nfsd? It was not clear to me after reading the > Exporting document in Documentation directory. You need to be able to map a dentry to a filehandle (you get about 20 bytes) and back again. If CIFS provides some fix-length identifier for files, then you might be able to do it. If not, cannot really do it at all. And I suspect the later. (There are other requirements, like get_parent, but we could probably work around those if we really needed to). Theoretically, you could make it work with NFSv4 and volatile file handles, but I doubt it would really work in practice. I don't think the "volatile" concept quite stretch as far as you would need. Probably the best way to nfs-export a CIFS filesystem is to use the user-space nfs server. It caches recently used filenames and uses a filehandle which is a hash of the name. It works on a best-effort basis, and if, for example, the server restarts, you will lose connections to open files. While it is not perfect, it can be very useful in some situations. NeilBrown - To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
