From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932417AbWGLSWz (ORCPT ); Wed, 12 Jul 2006 14:22:55 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932371AbWGLSVl (ORCPT ); Wed, 12 Jul 2006 14:21:41 -0400 Received: from e3.ny.us.ibm.com ([32.97.182.143]:16572 "EHLO e3.ny.us.ibm.com") by vger.kernel.org with ESMTP id S932362AbWGLSRY (ORCPT ); Wed, 12 Jul 2006 14:17:24 -0400 Subject: [RFC][PATCH 12/27] sys_symlinkat() elevate write count around vfs_symlink() 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 11:17:18 -0700 References: <20060712181709.5C1A4353@localhost.localdomain> In-Reply-To: <20060712181709.5C1A4353@localhost.localdomain> Message-Id: <20060712181718.5B0D2A0C@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_symlink-part3 fs/namei.c --- lxc/fs/namei.c~C-elevate-writers-vfs_symlink-part3 2006-07-12 11:09:27.000000000 -0700 +++ lxc-dave/fs/namei.c 2006-07-12 11:09:29.000000000 -0700 @@ -2213,7 +2213,12 @@ asmlinkage long sys_symlinkat(const char if (IS_ERR(dentry)) goto out_unlock; + error = mnt_want_write(nd.mnt); + if (error) + goto out_dput; error = vfs_symlink(nd.dentry->d_inode, dentry, from, S_IALLUGO); + mnt_drop_write(nd.mnt); +out_dput: dput(dentry); out_unlock: mutex_unlock(&nd.dentry->d_inode->i_mutex); _