From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753903AbXITTzy (ORCPT ); Thu, 20 Sep 2007 15:55:54 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752128AbXITTxM (ORCPT ); Thu, 20 Sep 2007 15:53:12 -0400 Received: from e2.ny.us.ibm.com ([32.97.182.142]:50918 "EHLO e2.ny.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752061AbXITTxH (ORCPT ); Thu, 20 Sep 2007 15:53:07 -0400 Subject: [PATCH 12/25] elevate write count for link and symlink calls To: akpm@osdl.org Cc: linux-kernel@vger.kernel.org, hch@infradead.org, Dave Hansen From: Dave Hansen Date: Thu, 20 Sep 2007 12:53:04 -0700 References: <20070920195249.852667D5@kernel> In-Reply-To: <20070920195249.852667D5@kernel> Message-Id: <20070920195304.182F501B@kernel> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Acked-by: Christoph Hellwig Signed-off-by: Dave Hansen --- lxc-dave/fs/namei.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff -puN fs/namei.c~elevate-write-count-for-link-and-symlink-calls fs/namei.c --- lxc/fs/namei.c~elevate-write-count-for-link-and-symlink-calls 2007-09-20 12:16:15.000000000 -0700 +++ lxc-dave/fs/namei.c 2007-09-20 12:16:15.000000000 -0700 @@ -2299,7 +2299,12 @@ 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); @@ -2394,7 +2399,12 @@ 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); _