From mboxrd@z Thu Jan  1 00:00:00 1970
From: Al Viro <viro@ZenIV.linux.org.uk>
Subject: Re: [8/8] Fix fsnotify short comings (single fd with recursive
 notifications).
Date: Mon, 8 Apr 2013 16:22:55 +0100
Message-ID: <20130408152255.GR4068@ZenIV.linux.org.uk>
References: <516299A5.8030109@panasas.com>
 <51629FDB.5090708@panasas.com>
 <5162CD55.6040205@cea.fr>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Cc: Boaz Harrosh <bharrosh@panasas.com>,
	Steven Whitehouse <swhiteho@redhat.com>,
	Steve Dickson <steved@redhat.com>,
	Jeff Layton <jlayton@redhat.com>,
	lsf-pc@lists.linux-foundation.org,
	linux-fsdevel <linux-fsdevel@vger.kernel.org>,
	Ganesha NFS List <nfs-ganesha-devel@lists.sourceforge.net>,
	Frank S Filz <ffilz@us.ibm.com>,
	"J. Bruce Fields" <bfields@redhat.com>,
	"Lieb, Jim" <jlieb@panasas.com>,
	Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
To: DENIEL Philippe <philippe.deniel@cea.fr>
Return-path: <linux-fsdevel-owner@vger.kernel.org>
Received: from zeniv.linux.org.uk ([195.92.253.2]:60285 "EHLO
	ZenIV.linux.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
	with ESMTP id S935977Ab3DHPXH (ORCPT
	<rfc822;linux-fsdevel@vger.kernel.org>);
	Mon, 8 Apr 2013 11:23:07 -0400
Content-Disposition: inline
In-Reply-To: <5162CD55.6040205@cea.fr>
Sender: linux-fsdevel-owner@vger.kernel.org
List-ID: <linux-fsdevel.vger.kernel.org>

On Mon, Apr 08, 2013 at 03:59:49PM +0200, DENIEL Philippe wrote:

> What I have seen was this:
>     - if dnotify() is used, it gets every events. If used on a
> directory, it will get every creation and deletion. But it is not
> recursive, so we need to use dnotify on every inode we manage.
>     - if fanotify is used, it is recursive and by using it on the
> root of a filesystem, then you have events from the whole underlying
> tree. The trouble is that deletion seem not to be caught.

All *notify APIs are broken by design, film at 11...  See also: "Doctor,
it hurts when I do it"