Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756087Ab2BUTyn (ORCPT ); Tue, 21 Feb 2012 14:54:43 -0500 Received: from mx1.redhat.com ([209.132.183.28]:34436 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753996Ab2BUTyl (ORCPT ); Tue, 21 Feb 2012 14:54:41 -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 29/73] union-mount: Create IS_MNT_UNION() [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 18:01:11 +0000 Message-ID: <20120221180110.25235.77904.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: 1318 Lines: 43 From: Jan Blunck IS_MNT_UNION() tests whether a vfsmount is a union. Note that a directory in a union mounted file system is not necessarily unioned. Use IS_DIR_UNIONED() to test that. Original-author: Jan Blunck Signed-off-by: David Howells --- fs/union.h | 6 ++++++ 1 files changed, 6 insertions(+), 0 deletions(-) diff --git a/fs/union.h b/fs/union.h index e918a04..990dd16 100644 --- a/fs/union.h +++ b/fs/union.h @@ -51,6 +51,11 @@ struct union_stack { struct path u_dirs[0]; }; +static inline bool IS_MNT_UNION(struct vfsmount *mnt) +{ + return mnt->mnt_flags & MNT_UNION; +} + static inline bool IS_DIR_UNIONED(struct dentry *dentry) { return !!dentry->d_union_stack; @@ -77,6 +82,7 @@ struct path *union_find_dir(struct dentry *dentry, unsigned int layer) return NULL; } +static inline bool IS_MNT_UNION(struct vfsmount *mnt) { return false; } static inline bool IS_DIR_UNIONED(struct dentry *dentry) { return false; } static inline void d_free_unions(struct dentry *dentry) {} -- 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/