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=-13.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham 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 CBFA4C4361B for ; Tue, 15 Dec 2020 22:26:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9CD4F2065D for ; Tue, 15 Dec 2020 22:26:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731298AbgLOW0O (ORCPT ); Tue, 15 Dec 2020 17:26:14 -0500 Received: from mail105.syd.optusnet.com.au ([211.29.132.249]:42901 "EHLO mail105.syd.optusnet.com.au" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731552AbgLOW0K (ORCPT ); Tue, 15 Dec 2020 17:26:10 -0500 Received: from dread.disaster.area (pa49-179-6-140.pa.nsw.optusnet.com.au [49.179.6.140]) by mail105.syd.optusnet.com.au (Postfix) with ESMTPS id D24B63C272E; Wed, 16 Dec 2020 09:25:23 +1100 (AEDT) Received: from dave by dread.disaster.area with local (Exim 4.92.3) (envelope-from ) id 1kpIl0-004MQy-R4; Wed, 16 Dec 2020 09:25:22 +1100 Date: Wed, 16 Dec 2020 09:25:22 +1100 From: Dave Chinner To: Jens Axboe Cc: linux-fsdevel@vger.kernel.org, torvalds@linux-foundation.org, viro@zeniv.linux.org.uk Subject: Re: [PATCH 3/4] fs: expose LOOKUP_NONBLOCK through openat2() RESOLVE_NONBLOCK Message-ID: <20201215222522.GS3913616@dread.disaster.area> References: <20201214191323.173773-1-axboe@kernel.dk> <20201214191323.173773-4-axboe@kernel.dk> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20201214191323.173773-4-axboe@kernel.dk> X-Optus-CM-Score: 0 X-Optus-CM-Analysis: v=2.3 cv=F8MpiZpN c=1 sm=1 tr=0 cx=a_idp_d a=uDU3YIYVKEaHT0eX+MXYOQ==:117 a=uDU3YIYVKEaHT0eX+MXYOQ==:17 a=kj9zAlcOel0A:10 a=zTNgK-yGK50A:10 a=drOt6m5kAAAA:8 a=7-415B0cAAAA:8 a=nxstkhmkV2fPwvo5-F4A:9 a=CjuIK1q_8ugA:10 a=RMMjzBEyIzXRtoq5n5K6:22 a=biEYGPWJfzWAr4FL6Ov7:22 Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org On Mon, Dec 14, 2020 at 12:13:23PM -0700, Jens Axboe wrote: > Now that we support non-blocking path resolution internally, expose it > via openat2() in the struct open_how ->resolve flags. This allows > applications using openat2() to limit path resolution to the extent that > it is already cached. > > If the lookup cannot be satisfied in a non-blocking manner, openat2(2) > will return -1/-EAGAIN. > > Cc: Al Viro > Signed-off-by: Jens Axboe > --- > fs/open.c | 6 ++++++ > include/linux/fcntl.h | 2 +- > include/uapi/linux/openat2.h | 4 ++++ What text are you going to add to the man page to describe how this flag behaves to developers? Cheers, Dave. -- Dave Chinner david@fromorbit.com