From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755108Ab2IQNJo (ORCPT ); Mon, 17 Sep 2012 09:09:44 -0400 Received: from mail.parknet.co.jp ([210.171.160.6]:39655 "EHLO mail.parknet.co.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754604Ab2IQNJn (ORCPT ); Mon, 17 Sep 2012 09:09:43 -0400 From: OGAWA Hirofumi To: Namjae Jeon Cc: akpm@linux-foundation.org, bfields@fieldses.org, viro@zeniv.linux.org.uk, linux-kernel@vger.kernel.org, Namjae Jeon Subject: Re: [PATCH v3 0/5] fat: make persistent inode numbers and stablize for NFS. References: <1347798099-2592-1-git-send-email-linkinjeon@gmail.com> Date: Mon, 17 Sep 2012 22:09:33 +0900 In-Reply-To: <1347798099-2592-1-git-send-email-linkinjeon@gmail.com> (Namjae Jeon's message of "Sun, 16 Sep 2012 08:21:39 -0400") Message-ID: <87k3vs6bjm.fsf@devron.myhome.or.jp> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.2.50 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Namjae Jeon writes: > From: Namjae Jeon > > This patch-set eliminates the client side ESTALE errors when a FAT partition > exported over NFS has its dentries evicted from the cache. > > One of the reasons for this error is lack of permanent inode numbers on FAT > which makes it difficult to construct persistent file handles. > This can be overcome by using the on-disk location of the directory entries > (i_pos) as the inode numbers. > > Once the i_pos is available, it is only a matter of reading the directory > entries from the disk clusters to locate the matching entry and rebuild > the corresponding inode. > > We reached the conclusion support stable inode's read-only export first after > discussing with OGAWA and Bruce. > And will make it writable with some operation(unlink and rename) limitation > next time. > > Namjae Jeon (4) > fat: modify nfs mount option > fat: allocate persistent inode numbers > fat (exportfs): rebuild inode if ilookup() fails > fat (exportfs): rebuild directory-inode if fat_dget() fails > Documentation: update nfs option in filesystem/vfat.txt Sorry for late, I will review at next weekend. Thanks. -- OGAWA Hirofumi