Received: by 2002:a05:6a10:8c0a:0:0:0:0 with SMTP id go10csp2803572pxb;
        Tue, 19 Jan 2021 06:35:59 -0800 (PST)
X-Google-Smtp-Source: ABdhPJz1MmiOcqgtWQ2AUJ1cpzkR4Uqze6PlHVTpl96bNnGFrpdDWu+mQI44aDRGdpZDi7LnRfG1
X-Received: by 2002:aa7:cfd7:: with SMTP id r23mr3597882edy.298.1611066959034;
        Tue, 19 Jan 2021 06:35:59 -0800 (PST)
ARC-Seal: i=1; a=rsa-sha256; t=1611066959; cv=none;
        d=google.com; s=arc-20160816;
        b=O1HJ/Mu3ljCyRKwYk7kuPVMPAP5Q/eIa2TzRuQ6KSZ29r3XiM3ZDMriSr38ZnBfQM7
         mUdAKb84KW9mnfOugRSOc8OqdvG9cEadEZ7wqorYHGTG8TBLwbWLxN/nhP0FUxC1n68V
         Em01W0m9NqJk3eByZ7VHU+ucaFkc9l66gLRrbbIIo3gqSIMKWItnYGhb+KOt8ATrvgDO
         0EwzGSX48aivypfzEj6usM60js8S991w/el2HOXh4zog9Oog7iO87Rdz8gpVzkDcnz4x
         crv6QnD2QqfbAdiG9X+qSDI2wJC8pIzXqmauF9e/4FaoIP9rOx1lqO7Cbgkavtwnz///
         ubHg==
ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816;
        h=list-id:precedence:in-reply-to:content-disposition:mime-version
         :references:message-id:subject:cc:to:from:date:dkim-signature;
        bh=9acveTIrtmshZa2kKhvPTcQBw36FunS33HkdJa8AHjc=;
        b=f2ZdxeawM4uR9TcdBD14y8xSh7M1Vuq0waMgc3h6sYfWto6/8y3KQvIvli/ddfp1rx
         pPPPAcuZcmTPrBQSMtWeoEgDu9JeTB+xYFTrmYhccJJr8chbHMogQHywbwNrP7NEDa6a
         kOpuV7L7ZFKXcBreiB1LX5U8p9dMUZ734eGZreZTuLKXslf5vofaf9YxksRqXb8Q9sl6
         WajdiYQp0CfL5ycIjFEQfNUWoK1TpOPM3/FV2L5SxZgpRuHK8tf5EIW3x6YeSYZhaJBo
         65XXYp0M6iY4kVUZu0lpLEnu2CHVJPiekkT0mD7lOmNsE+9XS0h8B3aYceK97xLtJjvF
         7yqg==
ARC-Authentication-Results: i=1; mx.google.com;
       dkim=pass header.i=@infradead.org header.s=casper.20170209 header.b=s7c2UNLY;
       spf=pass (google.com: domain of linux-ext4-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-ext4-owner@vger.kernel.org
Return-Path: <linux-ext4-owner@vger.kernel.org>
Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18])
        by mx.google.com with ESMTP id qt20si1512797ejb.486.2021.01.19.06.35.35;
        Tue, 19 Jan 2021 06:35:59 -0800 (PST)
Received-SPF: pass (google.com: domain of linux-ext4-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
Authentication-Results: mx.google.com;
       dkim=pass header.i=@infradead.org header.s=casper.20170209 header.b=s7c2UNLY;
       spf=pass (google.com: domain of linux-ext4-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-ext4-owner@vger.kernel.org
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
        id S2405114AbhASOcH (ORCPT <rfc822;romeusmeister@gmail.com>
        + 99 others); Tue, 19 Jan 2021 09:32:07 -0500
Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47712 "EHLO
        lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
        with ESMTP id S2387781AbhASJnl (ORCPT
        <rfc822;linux-ext4@vger.kernel.org>); Tue, 19 Jan 2021 04:43:41 -0500
Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1])
        by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 373D4C0613C1;
        Tue, 19 Jan 2021 01:43:00 -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=9acveTIrtmshZa2kKhvPTcQBw36FunS33HkdJa8AHjc=; b=s7c2UNLYdD3Wg/Q6KFDrPWO33z
        5NTdjpifi/UeIV8tUP+jwvs9lLk+iVs9ntJhesGxrDR2xFN+xb2sjgIL2XCYbT7rJQB0bDNaf06bm
        sOCyQFA7AGQefvzpHr/clyZUcINsqreGrFbxe3QDuIxuAKtjs+cDCi9wU4EoZYJj34eJtNeOJzhcq
        EJKHB9O70gs7ugPnGzDe0xiqTMuZOkulxl3y1uqrmZMS4n8qu2r6FXXj+89XS9rbt5n8GNxJ7z+89
        y6MyhTCzfdXekyv3NZjsv+uHxv56KblnFMzwut1+AIkzg4RmCbU6VLrTay46MVzxtVQgH4+WMGH5n
        3Pi6BDZA==;
Received: from hch by casper.infradead.org with local (Exim 4.94 #2 (Red Hat Linux))
        id 1l1nXD-00E8Fi-FR; Tue, 19 Jan 2021 09:42:48 +0000
Date:   Tue, 19 Jan 2021 09:42:47 +0000
From:   Christoph Hellwig <hch@infradead.org>
To:     Christian Brauner <christian.brauner@ubuntu.com>
Cc:     Alexander Viro <viro@zeniv.linux.org.uk>,
        Christoph Hellwig <hch@infradead.org>,
        linux-fsdevel@vger.kernel.org,
        John Johansen <john.johansen@canonical.com>,
        James Morris <jmorris@namei.org>,
        Mimi Zohar <zohar@linux.ibm.com>,
        Dmitry Kasatkin <dmitry.kasatkin@gmail.com>,
        Stephen Smalley <stephen.smalley.work@gmail.com>,
        Casey Schaufler <casey@schaufler-ca.com>,
        Arnd Bergmann <arnd@arndb.de>,
        Andreas Dilger <adilger.kernel@dilger.ca>,
        OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>,
        Geoffrey Thomas <geofft@ldpreload.com>,
        Mrunal Patel <mpatel@redhat.com>,
        Josh Triplett <josh@joshtriplett.org>,
        Andy Lutomirski <luto@kernel.org>,
        Theodore Tso <tytso@mit.edu>, Alban Crequy <alban@kinvolk.io>,
        Tycho Andersen <tycho@tycho.ws>,
        David Howells <dhowells@redhat.com>,
        James Bottomley <James.Bottomley@hansenpartnership.com>,
        Seth Forshee <seth.forshee@canonical.com>,
        St??phane Graber <stgraber@ubuntu.com>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Aleksa Sarai <cyphar@cyphar.com>,
        Lennart Poettering <lennart@poettering.net>,
        "Eric W. Biederman" <ebiederm@xmission.com>, smbarber@chromium.org,
        Phil Estes <estesp@gmail.com>, Serge Hallyn <serge@hallyn.com>,
        Kees Cook <keescook@chromium.org>,
        Todd Kjos <tkjos@google.com>, Paul Moore <paul@paul-moore.com>,
        Jonathan Corbet <corbet@lwn.net>,
        containers@lists.linux-foundation.org,
        linux-security-module@vger.kernel.org, linux-api@vger.kernel.org,
        linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org,
        linux-integrity@vger.kernel.org, selinux@vger.kernel.org,
        Christoph Hellwig <hch@lst.de>
Subject: Re: [PATCH v5 27/42] notify: handle idmapped mounts
Message-ID: <20210119094247.GL3364550@infradead.org>
References: <20210112220124.837960-1-christian.brauner@ubuntu.com>
 <20210112220124.837960-28-christian.brauner@ubuntu.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20210112220124.837960-28-christian.brauner@ubuntu.com>
X-SRS-Rewrite: SMTP reverse-path rewritten from <hch@infradead.org> by casper.infradead.org. See http://www.infradead.org/rpr.html
Precedence: bulk
List-ID: <linux-ext4.vger.kernel.org>
X-Mailing-List: linux-ext4@vger.kernel.org

Another spot where the path_permission helper would be useful..