From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932366AbWGLSW4 (ORCPT ); Wed, 12 Jul 2006 14:22:56 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932367AbWGLSVh (ORCPT ); Wed, 12 Jul 2006 14:21:37 -0400 Received: from e5.ny.us.ibm.com ([32.97.182.145]:15045 "EHLO e5.ny.us.ibm.com") by vger.kernel.org with ESMTP id S932366AbWGLSRZ (ORCPT ); Wed, 12 Jul 2006 14:17:25 -0400 Subject: [RFC][PATCH 14/27] sys_linkat(): elevate write count around vfs_link() To: viro@ftp.linux.org.uk Cc: serue@us.ibm.com, linux-kernel@vger.kernel.org, Dave Hansen From: Dave Hansen Date: Wed, 12 Jul 2006 11:17:19 -0700 References: <20060712181709.5C1A4353@localhost.localdomain> In-Reply-To: <20060712181709.5C1A4353@localhost.localdomain> Message-Id: <20060712181719.2DB4F618@localhost.localdomain> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Signed-off-by: Dave Hansen --- lxc-dave/fs/namei.c | 5 +++++ 1 files changed, 5 insertions(+) diff -puN fs/namei.c~C-elevate-writers-vfs_link-part1 fs/namei.c --- lxc/fs/namei.c~C-elevate-writers-vfs_link-part1 2006-07-12 11:09:29.000000000 -0700 +++ lxc-dave/fs/namei.c 2006-07-12 11:09:31.000000000 -0700 @@ -2313,7 +2313,12 @@ asmlinkage long sys_linkat(int olddfd, c error = PTR_ERR(new_dentry); if (IS_ERR(new_dentry)) goto out_unlock; + error = mnt_want_write(nd.mnt); + if (error) + goto out_dput; error = vfs_link(old_nd.dentry, nd.dentry->d_inode, new_dentry); + mnt_drop_write(nd.mnt); +out_dput: dput(new_dentry); out_unlock: mutex_unlock(&nd.dentry->d_inode->i_mutex); _