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=-3.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 5DC0FC433B4 for ; Wed, 31 Mar 2021 16:29:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 21A8F6100C for ; Wed, 31 Mar 2021 16:29:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233911AbhCaQ2g (ORCPT ); Wed, 31 Mar 2021 12:28:36 -0400 Received: from out03.mta.xmission.com ([166.70.13.233]:45098 "EHLO out03.mta.xmission.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232319AbhCaQ2M (ORCPT ); Wed, 31 Mar 2021 12:28:12 -0400 Received: from in02.mta.xmission.com ([166.70.13.52]) by out03.mta.xmission.com with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.93) (envelope-from ) id 1lRdhS-00HJ5m-1Q; Wed, 31 Mar 2021 10:28:10 -0600 Received: from ip68-227-160-95.om.om.cox.net ([68.227.160.95] helo=fess.xmission.com) by in02.mta.xmission.com with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.93) (envelope-from ) id 1lRdhP-005qdR-K5; Wed, 31 Mar 2021 10:28:08 -0600 From: ebiederm@xmission.com (Eric W. Biederman) To: Al Viro Cc: Dmitry Kadashev , Jens Axboe , io-uring , linux-fsdevel@vger.kernel.org References: <20201116044529.1028783-1-dkadashev@gmail.com> <20201116044529.1028783-2-dkadashev@gmail.com> <027e8488-2654-12cd-d525-37f249954b4d@kernel.dk> <20210126225504.GM740243@zeniv-ca> <20210201150042.GQ740243@zeniv-ca> <20210201152947.GR740243@zeniv-ca> Date: Wed, 31 Mar 2021 11:28:04 -0500 In-Reply-To: <20210201152947.GR740243@zeniv-ca> (Al Viro's message of "Mon, 1 Feb 2021 15:29:47 +0000") Message-ID: User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/26.1 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-XM-SPF: eid=1lRdhP-005qdR-K5;;;mid=;;;hst=in02.mta.xmission.com;;;ip=68.227.160.95;;;frm=ebiederm@xmission.com;;;spf=neutral X-XM-AID: U2FsdGVkX18axJtBcCUniFz8RzQG8ulDljcYSflJCpE= X-SA-Exim-Connect-IP: 68.227.160.95 X-SA-Exim-Mail-From: ebiederm@xmission.com Subject: Re: [PATCH 1/2] fs: make do_mkdirat() take struct filename X-SA-Exim-Version: 4.2.1 (built Sat, 08 Feb 2020 21:53:50 +0000) X-SA-Exim-Scanned: Yes (on in02.mta.xmission.com) Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org Al Viro writes: > On Mon, Feb 01, 2021 at 03:00:42PM +0000, Al Viro wrote: > >> The last one is the easiest to answer - we want to keep the imported strings >> around for audit. It's not so much a proper refcounting as it is "we might >> want freeing delayed" implemented as refcount. > > BTW, regarding io_uring + audit interactions - just how is that supposed to > work if you offload any work that might lead to audit records (on permission > checks, etc.) to helper threads? For people looking into these details. Things have gotten much better recently. The big change is that io_uring helper threads are now proper threads of the process that is using io_uring. The io_uring helper threads just happen to never execute any userspace code. Eric