From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757412Ab2IDP6Q (ORCPT ); Tue, 4 Sep 2012 11:58:16 -0400 Received: from mail-pb0-f46.google.com ([209.85.160.46]:35521 "EHLO mail-pb0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756885Ab2IDP6L (ORCPT ); Tue, 4 Sep 2012 11:58:11 -0400 From: Namjae Jeon To: hirofumi@mail.parknet.co.jp, akpm@linux-foundation.org, bfields@fieldses.org, viro@zeniv.linux.org.uk Cc: linux-kernel@vger.kernel.org, Namjae Jeon , Namjae Jeon , Ravishankar N , Amit Sahrawat Subject: [PATCH v2 2/5] fat (exportfs): rebuild inode if ilookup() fails Date: Wed, 5 Sep 2012 00:58:00 +0900 Message-Id: <1346774280-8068-1-git-send-email-linkinjeon@gmail.com> X-Mailer: git-send-email 1.7.9.5 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Namjae Jeon Since the previous patch in this patch-set uses i_pos as the inode number, we can use it to find the directory entry of the inode and subsequently rebuild the inode if the cache lookups fail. Since this involves accessing the FAT media,it is better to do this only if the 'nfs' mount option is enabled. Signed-off-by: Namjae Jeon Signed-off-by: Ravishankar N Signed-off-by: Amit Sahrawat --- fs/fat/nfs.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) diff --git a/fs/fat/nfs.c b/fs/fat/nfs.c index ef4b5fa..72e62f2 100644 --- a/fs/fat/nfs.c +++ b/fs/fat/nfs.c @@ -52,6 +52,31 @@ static struct inode *fat_nfs_get_inode(struct super_block *sb, iput(inode); inode = NULL; } + if (inode == NULL && MSDOS_SB(sb)->options.nfs) { + struct buffer_head *bh = NULL; + struct msdos_dir_entry *de ; + loff_t i_pos = (loff_t)ino; + int bits = MSDOS_SB(sb)->dir_per_block_bits; + loff_t blocknr = i_pos >> bits; + bh = sb_bread(sb, blocknr); + if (!bh) { + fat_msg(sb, KERN_ERR, + "unable to read block(%llu) for building NFS inode", + (llu)blocknr); + return inode; + } + de = (struct msdos_dir_entry *)bh->b_data; + /* If a file is deleted on server and client is not updated + * yet, we must not build the inode upon a lookup call. + */ + if (de[i_pos&((1<