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=-5.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,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 AA582C433DB for ; Wed, 13 Jan 2021 08:15:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 645A42333B for ; Wed, 13 Jan 2021 08:15:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726809AbhAMIPA (ORCPT ); Wed, 13 Jan 2021 03:15:00 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41088 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726799AbhAMIPA (ORCPT ); Wed, 13 Jan 2021 03:15:00 -0500 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1143EC061786 for ; Wed, 13 Jan 2021 00:14:20 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.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; bh=gGDAxpRzDfTRkcbZGlaFNZEk3KKCV1HZKce10YnZBmg=; b=VoiXeG9Ix3ixAVkOCp31gYMPkJ jnYrjllWSoK2YQg/fkg1yIHvq4gJyHEnWQc2DXnUwqnDWx8PV6wjYMdqSR2LNpZyPxMiPVrPZJrpt Za7EKE+UQFbCbWDQ+ME/pnpNVD79bXOO9z4QqOTFbyU8wcIb5pSqYvltUbmgGvtbasWgQHJ8WVJG+ gDlRu113P+0VEqYvj/e0NEKN9O1q5QsIdHfQW4qkp0I8ns810fwrCwTX3zknAReDfvxxo7GftWbdm jS4PpJ7/0UMeEZEc7BPoNVSZnOA14vVkww+Xh11Af6dqNbVXECCFnnOyC3s+CNyQtxEYGAbCUt/+T kDa97oAQ==; Received: from hch by casper.infradead.org with local (Exim 4.94 #2 (Red Hat Linux)) id 1kzbGg-00601Q-31; Wed, 13 Jan 2021 08:12:50 +0000 Date: Wed, 13 Jan 2021 08:12:38 +0000 From: Christoph Hellwig To: "bfields@fieldses.org" Cc: Patrick Goetz , Trond Myklebust , "wangzhibei1999@gmail.com" , "security@kernel.org" , "w@1wt.eu" , "greg@kroah.com" , "linux-nfs@vger.kernel.org" , "chuck.lever@oracle.com" Subject: Re: nfsd vurlerability submit Message-ID: <20210113081238.GA1428651@infradead.org> References: <20210108152607.GA950@1wt.eu> <20210108153237.GB4183@fieldses.org> <20210108154230.GB950@1wt.eu> <20210111193655.GC2600@fieldses.org> <20210112153208.GF9248@fieldses.org> <8296b696a7fa5591ad3fbb05bfcf6bdf6175cc38.camel@hammerspace.com> <42fcbc42-f1b3-5d99-c507-e1b579f5a37a@math.utexas.edu> <20210112180326.GI9248@fieldses.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210112180326.GI9248@fieldses.org> X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org FYI, if people really want to use some sort of subtree exports, for XFS (and probably ext4) we encode the project id into the file handle and use the hierarchical project ID inheritance that we already use for project quotas.