Received: by 2002:a05:6a10:22f:0:0:0:0 with SMTP id 15csp1171429pxk; Thu, 10 Sep 2020 08:42:37 -0700 (PDT) X-Google-Smtp-Source: ABdhPJxBOoK8KnmUNhQiq6qRI5kyrgB4lGNb55BDrIh165YeJLx1fVY9Pm2R7r7Qcr75VpRHXEYD X-Received: by 2002:a50:fa94:: with SMTP id w20mr9699493edr.206.1599752556995; Thu, 10 Sep 2020 08:42:36 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1599752556; cv=none; d=google.com; s=arc-20160816; b=fMacZKW60hHxQFkeGohiFSBwNzGTf5iTgVN//A23ZjRd5rrzcDUJu3mIkHO58sr4W7 ceL9UJLTFck42hSX+WjzzvQcq1tRPCghLLeXwRMUHstSAhoEHL4wjIEXtRkov/kmatBH eM/taY+ctJo89ewMrimoHfVC8Mu+5t8JAZs5BJcmoIyrxcUIKg/KZGzmSKC/tXY/znBq QD2PBV64hGLTIVKy0UlHkgR4Mzjq2vM2ryyNw2fvBgZrJjKpazltuW51wnoECKSJh4Nd Af7qwGiPZxVesQbXXfHTskO/HTm3dg73mgVf7UEpiA/zt9Gd+6qYj/Yp3mus16SYLA44 QYvQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:in-reply-to:content-disposition :mime-version:references:message-id:subject:cc:to:from:date; bh=1p73Bpt3gRxL/Fqnc3LN39ZjICEkYZAOo8xa2+pTG4Y=; b=0kr/ZhH1/F8EKKbuMIAebf0VqCutNvt0oUzvrBNVLDwqgmUcuWolvVeFIhuJ/gVFo0 jDuuVWM2mpY9Xz4JGhuWjq7zvK9jVXlAbjNkV2HXDm2a85tELBW6cZFBQVefcgwW8kkV TXhweopJbi2Spz+EFE1w4Fvgh/R2Vps4nlOkDR07+YvTyF+Ii6Ex/utnwG2ww9JCyodf xYCN0TuN8xsZ/HX3xPaR6UKGmSywLQz/WuEJwwc+YppSEVRjm9NDJcHoxgVKXb25YxEa snQlFIRD8OXM0rx4aUQe0DQzQxRsPQ321gz0U5tMpHLKedTI5DjDB0VOGHUZA/iSUDiz 1wDQ== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id cd7si3915887ejb.433.2020.09.10.08.42.14; Thu, 10 Sep 2020 08:42:36 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731222AbgIJPim (ORCPT + 99 others); Thu, 10 Sep 2020 11:38:42 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38328 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731372AbgIJPhg (ORCPT ); Thu, 10 Sep 2020 11:37:36 -0400 Received: from ZenIV.linux.org.uk (zeniv.linux.org.uk [IPv6:2002:c35c:fd02::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8AA99C061367; Thu, 10 Sep 2020 08:18:31 -0700 (PDT) Received: from viro by ZenIV.linux.org.uk with local (Exim 4.92.3 #3 (Red Hat Linux)) id 1kGOLE-00Dnc6-N4; Thu, 10 Sep 2020 15:18:28 +0000 Date: Thu, 10 Sep 2020 16:18:28 +0100 From: Al Viro To: Rich Felker Cc: linux-api@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] vfs: add fchmodat2 syscall Message-ID: <20200910151828.GD1236603@ZenIV.linux.org.uk> References: <20200910142335.GG3265@brightrain.aerifal.cx> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200910142335.GG3265@brightrain.aerifal.cx> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Sep 10, 2020 at 10:23:37AM -0400, Rich Felker wrote: > It was determined (see glibc issue #14578 and commit a492b1e5ef) that, > on some filesystems, performing chmod on the link itself produces a > change in the inode's access mode, but returns an EOPNOTSUPP error. Which filesystem types are those?