From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.0 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9E55BC76190 for ; Thu, 25 Jul 2019 19:26:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6D40A218DA for ; Thu, 25 Jul 2019 19:26:25 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="GEemGIEU" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726637AbfGYT0Z (ORCPT ); Thu, 25 Jul 2019 15:26:25 -0400 Received: from bombadil.infradead.org ([198.137.202.133]:39936 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726597AbfGYT0Y (ORCPT ); Thu, 25 Jul 2019 15:26:24 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=In-Reply-To:Content-Type:MIME-Version :References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=BvJfAiV7y1bt1QsTdKGqKWc9bBWeOKVa3Zdi7n7uICU=; b=GEemGIEUXmry2MJXAjVXQDGF0 XF3FT3klB2ey0oBCEDsN72DpYlo8141rse50i45Eq6a3jFCCwbCg/eIV5t7Gc6uAT7VBxVGGD4F0F RtMsUtkuhKTWfBA6VXNvNjfMfjcF7qbl3/Rxc9VSt62GWBO23HCrbN0lwsC+1KyfQAP5IPGEhUnYj KO8yzpJig7ZG3LTI+Zo7V+1yfmcHeh2Wu1xA5q20foCnUJ038vvLBBQfXSoSYEKKFFwXniYYsO9kH 3pOKNvyV6Em7Vnc+UT0DoTTSdy9kTa7a39bhtEgVbkuuk+GgFMEEV+2BhwO9e1PIAocHYP+mQ6Tl/ vp7uGtzFg==; Received: from willy by bombadil.infradead.org with local (Exim 4.92 #3 (Red Hat Linux)) id 1hqjNZ-0002S1-WB; Thu, 25 Jul 2019 19:26:18 +0000 Date: Thu, 25 Jul 2019 12:26:17 -0700 From: Matthew Wilcox To: Logan Gunthorpe Cc: Sagi Grimberg , Greg Kroah-Hartman , Jens Axboe , Chaitanya Kulkarni , linux-kernel@vger.kernel.org, linux-nvme@lists.infradead.org, Stephen Bates , linux-block@vger.kernel.org, Keith Busch , Alexander Viro , linux-fsdevel@vger.kernel.org, Max Gurtovoy , Christoph Hellwig Subject: Re: [PATCH v6 02/16] chardev: introduce cdev_get_by_path() Message-ID: <20190725192613.GF30641@bombadil.infradead.org> References: <20190725172335.6825-3-logang@deltatee.com> <20190725174032.GA27818@kroah.com> <682ff89f-04e0-7a94-5aeb-895ac65ee7c9@deltatee.com> <20190725180816.GA32305@kroah.com> <20190725182701.GA11547@kroah.com> <20190725190024.GD30641@bombadil.infradead.org> <27943e06-a503-162e-356b-abb9e106ab2e@grimberg.me> <20190725191124.GE30641@bombadil.infradead.org> <425dd2ac-333d-a8c4-ce49-870c8dadf436@deltatee.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <425dd2ac-333d-a8c4-ce49-870c8dadf436@deltatee.com> User-Agent: Mutt/1.11.4 (2019-03-13) Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org On Thu, Jul 25, 2019 at 01:24:22PM -0600, Logan Gunthorpe wrote: > >> Assuming that there is a open handle somewhere out there... > > Yes, that would be a step backwards from an interface. The user would > then need a special process to open the fd and pass it through configfs. > They couldn't just do it with basic bash commands. echo 3 3/configfs/foor/bar/whatever