Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S964859AbWIABfd (ORCPT ); Thu, 31 Aug 2006 21:35:33 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S964849AbWIABfd (ORCPT ); Thu, 31 Aug 2006 21:35:33 -0400 Received: from filer.fsl.cs.sunysb.edu ([130.245.126.2]:13190 "EHLO filer.fsl.cs.sunysb.edu") by vger.kernel.org with ESMTP id S964848AbWIABfc (ORCPT ); Thu, 31 Aug 2006 21:35:32 -0400 Date: Thu, 31 Aug 2006 21:35:13 -0400 From: Josef Sipek To: linux-kernel@vger.kernel.org Cc: linux-fsdevel@vger.kernel.org, hch@infradead.org, akpm@osdl.org, viro@ftp.linux.org.uk Subject: [PATCH 00/22][RFC] Unionfs: Stackable Namespace Unification Filesystem Message-ID: <20060901013512.GA5788@fsl.cs.sunysb.edu> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.4.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3159 Lines: 74 This set of patches constitutes Unionfs version 2.0. We are presenting it to be reviewed and considered for inclusion into the kernel. Unionfs is a stackable filesystem that is based off of the FiST stackable filesystem framework written by Erez Zadok: see . Josef Sipek presented Unionfs at the 2006 Ottawa Linux Symposiums; the high-level overview from this year's symposium starts on page 349 of the second half of the symposium proceedings: see Note that this set of patches contains a considerably trimmed-down version of Unionfs. That way it'd be possible to evaluate Unionfs's most basic functionality, gradually adding features in future patches. To download tarballs of the full source, along with userspace utilities, read various documents and other info about Unionfs, see the home page at Josef "Jeff" Sipek, on behalf of the Unionfs team. Index: ======= [PATCH 01/22][RFC] Unionfs: Documentation [PATCH 02/22][RFC] Unionfs: Kconfig and Makefile [PATCH 03/22][RFC] Unionfs: Branch management functionality [PATCH 04/22][RFC] Unionfs: Common file operations [PATCH 05/22][RFC] Unionfs: Copyup Functionality [PATCH 06/22][RFC] Unionfs: Dentry operations [PATCH 07/22][RFC] Unionfs: Directory file operations [PATCH 08/22][RFC] Unionfs: Directory manipulation helper functions [PATCH 09/22][RFC] Unionfs: File operations [PATCH 10/22][RFC] Unionfs: Inode operations [PATCH 11/22][RFC] Unionfs: Lookup helper functions [PATCH 12/22][RFC] Unionfs: Main module functions [PATCH 13/22][RFC] Unionfs: Readdir state [PATCH 14/22][RFC] Unionfs: Rename [PATCH 15/22][RFC] Unionfs: Privileged operations workqueue [PATCH 16/22][RFC] Unionfs: Handling of stale inodes [PATCH 17/22][RFC] Unionfs: Miscellaneous helper functions [PATCH 18/22][RFC] Unionfs: Superblock operations [PATCH 19/22][RFC] Unionfs: Helper macros/inlines [PATCH 20/22][RFC] Unionfs: Internal include file [PATCH 21/22][RFC] Unionfs: Unlink [PATCH 22/22][RFC] Unionfs: Include file Known Issues and Limitations: - The NFS server returns -EACCES for read-only exports, instead of -EROFS. This means we can't reliably detect a read-only NFS export. - Modifying a Unionfs branch directly, while the union is mounted, is currently unsupported. Any such change may cause Unionfs to oops and it can even result in data loss! - The PPC module loading algorithm has an O(N^2) loop, so it takes a while to load the Unionfs module, because we have lots of symbols. - Unionfs shouldn't use lookup_one_len on the underlying fs as it confuses NFS. For the initial release we removed support for xattrs, persistent inode mappings, and mmap operations. Signed-off-by: Josef "Jeff" Sipek Signed-off-by: David Quigley Signed-off-by: Erez Zadok - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/