Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755689Ab0BJJa4 (ORCPT ); Wed, 10 Feb 2010 04:30:56 -0500 Received: from acsinet12.oracle.com ([141.146.126.234]:61048 "EHLO acsinet12.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755565Ab0BJJ3U (ORCPT ); Wed, 10 Feb 2010 04:29:20 -0500 From: Joel Becker To: ocfs2-devel@oss.oracle.com Cc: linux-kernel@vger.kernel.org, mfasheh@suse.com Subject: [PATCH 09/11] ocfs2_dlmfs: Don't honor truncate. The size of a dlmfs file is LVB_LEN Date: Wed, 10 Feb 2010 01:27:52 -0800 Message-Id: <1265794074-19539-10-git-send-email-joel.becker@oracle.com> X-Mailer: git-send-email 1.5.6.5 In-Reply-To: <1265794074-19539-1-git-send-email-joel.becker@oracle.com> References: <1265794074-19539-1-git-send-email-joel.becker@oracle.com> X-Source-IP: acsmt356.oracle.com [141.146.40.156] X-Auth-Type: Internal IP X-CT-RefId: str=0001.0A090209.4B727C6C.0125:SCFMA4539814,ss=1,fgs=0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1603 Lines: 53 We want folks using dlmfs to be able to use the LVB in places other than just write(2)/read(2). By ignoring truncate requests, we allow 'echo "contents" > /dlm/space/lockname' to work. Signed-off-by: Joel Becker --- fs/ocfs2/dlmfs/dlmfs.c | 18 ++++++++++++++++++ 1 files changed, 18 insertions(+), 0 deletions(-) diff --git a/fs/ocfs2/dlmfs/dlmfs.c b/fs/ocfs2/dlmfs/dlmfs.c index e21ce0e..13ac2bf 100644 --- a/fs/ocfs2/dlmfs/dlmfs.c +++ b/fs/ocfs2/dlmfs/dlmfs.c @@ -220,6 +220,23 @@ static int dlmfs_file_release(struct inode *inode, return 0; } +/* + * We do ->setattr() just to override size changes. Our size is the size + * of the LVB and nothing else. + */ +static int dlmfs_file_setattr(struct dentry *dentry, struct iattr *attr) +{ + int error; + struct inode *inode = dentry->d_inode; + + attr->ia_valid &= ~ATTR_SIZE; + error = inode_change_ok(inode, attr); + if (!error) + error = inode_setattr(inode, attr); + + return error; +} + static unsigned int dlmfs_file_poll(struct file *file, poll_table *wait) { int event = 0; @@ -634,6 +651,7 @@ static const struct super_operations dlmfs_ops = { static const struct inode_operations dlmfs_file_inode_operations = { .getattr = simple_getattr, + .setattr = dlmfs_file_setattr, }; static int dlmfs_get_sb(struct file_system_type *fs_type, -- 1.6.6.1 -- 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/