Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934863AbZLGMr6 (ORCPT ); Mon, 7 Dec 2009 07:47:58 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S934104AbZLGMr5 (ORCPT ); Mon, 7 Dec 2009 07:47:57 -0500 Received: from fxip-0047f.externet.hu ([88.209.222.127]:43274 "EHLO pomaz-ex.szeredi.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933576AbZLGMr4 (ORCPT ); Mon, 7 Dec 2009 07:47:56 -0500 To: Alan Cox CC: luto@mit.edu, akpm@linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org In-reply-to: (message from Miklos Szeredi on Mon, 07 Dec 2009 13:41:09 +0100) Subject: Re: [PATCH v3] vfs: new O_NODE open flag References: <20091202191549.1dbffa2e@lxorguk.ukuu.org.uk> <20091202204828.4fa0c108@lxorguk.ukuu.org.uk> <4B1A7159.3070101@mit.edu> <20091205202838.3456b6fc@lxorguk.ukuu.org.uk> <20091205231304.03a4af61@lxorguk.ukuu.org.uk> <20091207122346.6d18a8e1@lxorguk.ukuu.org.uk> Message-Id: From: Miklos Szeredi Date: Mon, 07 Dec 2009 13:47:51 +0100 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 639 Lines: 17 On Mon, 07 Dec 2009, Miklos Szeredi wrote: > ln /dev/foo /dev/shm/my_secret_device_link > (foo is removed) > open("/dev/shm/my_secret_device_link", O_RDWR) > > How is this different than keeping the device open with O_NODE? In other words, revoking file handles is not enough, we really need to revoke the _inode_. And if we do that then O_NODE handles are perfectly harmless. Miklos -- 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/