Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755122Ab2BUSHz (ORCPT ); Tue, 21 Feb 2012 13:07:55 -0500 Received: from mx1.redhat.com ([209.132.183.28]:33283 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754438Ab2BUSHu (ORCPT ); Tue, 21 Feb 2012 13:07:50 -0500 Organization: Red Hat UK Ltd. Registered Address: Red Hat UK Ltd, Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SI4 1TE, United Kingdom. Registered in England and Wales under Company Registration No. 3798903 From: David Howells Subject: [PATCH 50/73] union-mount: Create whiteout on unlink() [ver #2] To: linux-fsdevel@vger.kernel.org, viro@ZenIV.linux.org.uk, valerie.aurora@gmail.com Cc: linux-kernel@vger.kernel.org, David Howells Date: Tue, 21 Feb 2012 18:03:44 +0000 Message-ID: <20120221180344.25235.79487.stgit@warthog.procyon.org.uk> In-Reply-To: <20120221175721.25235.8901.stgit@warthog.procyon.org.uk> References: <20120221175721.25235.8901.stgit@warthog.procyon.org.uk> User-Agent: StGIT/0.14.3 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1389 Lines: 44 From: Valerie Aurora Whiteout an unlinked directory entry in a union mounted file system. Original-author: Valerie Aurora Signed-off-by: David Howells --- fs/namei.c | 9 ++++----- 1 files changed, 4 insertions(+), 5 deletions(-) diff --git a/fs/namei.c b/fs/namei.c index 586913f..ce941ac 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -3333,11 +3333,6 @@ static long do_unlinkat(int dfd, const char __user *pathname) if (nd.last_type != LAST_NORM) goto exit1; - /* unlink() on union mounts not implemented yet */ - error = -EINVAL; - if (IS_DIR_UNIONED(nd.path.dentry)) - goto exit1; - nd.flags &= ~LOOKUP_PARENT; mutex_lock_nested(&nd.path.dentry->d_inode->i_mutex, I_MUTEX_PARENT); @@ -3356,6 +3351,10 @@ static long do_unlinkat(int dfd, const char __user *pathname) error = security_path_unlink(&nd.path, path.dentry); if (error) goto exit3; + if (IS_DIR_UNIONED(nd.path.dentry)) { + error = do_whiteout(&nd, &path, 0); + goto exit3; + } error = vfs_unlink(nd.path.dentry->d_inode, path.dentry); exit3: mnt_drop_write(nd.path.mnt); -- 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/