From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1422656AbWF0WV1 (ORCPT ); Tue, 27 Jun 2006 18:21:27 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1422674AbWF0WT5 (ORCPT ); Tue, 27 Jun 2006 18:19:57 -0400 Received: from e35.co.us.ibm.com ([32.97.110.153]:2218 "EHLO e35.co.us.ibm.com") by vger.kernel.org with ESMTP id S1030445AbWF0WOw (ORCPT ); Tue, 27 Jun 2006 18:14:52 -0400 Subject: [PATCH 08/20] sys_linkat(): elevate write count around vfs_link() To: akpm@osdl.org Cc: linux-kernel@vger.kernel.org, herbert@13thfloor.at, viro@ftp.linux.org.uk, serue@us.ibm.com, Dave Hansen From: Dave Hansen Date: Tue, 27 Jun 2006 15:14:47 -0700 References: <20060627221436.77CCB048@localhost.localdomain> In-Reply-To: <20060627221436.77CCB048@localhost.localdomain> Message-Id: <20060627221447.159C953A@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 2006-06-27 10:40:28.000000000 -0700 +++ lxc-dave/fs/namei.c 2006-06-27 10:40:28.000000000 -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); _