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=-5.1 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_1 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 9A8E2C433E0 for ; Mon, 25 Jan 2021 15:08:17 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id D3CDB22795 for ; Mon, 25 Jan 2021 15:08:16 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D3CDB22795 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:47002 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1l43TT-0007ep-Sz for qemu-devel@archiver.kernel.org; Mon, 25 Jan 2021 10:08:15 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:46040) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1l43RW-0006JI-H6 for qemu-devel@nongnu.org; Mon, 25 Jan 2021 10:06:14 -0500 Received: from us-smtp-delivery-124.mimecast.com ([63.128.21.124]:49859) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1l43RU-0003zT-S9 for qemu-devel@nongnu.org; Mon, 25 Jan 2021 10:06:14 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1611587168; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=oFjXvYPythvzmBsRRSp9UybNAvVnq2Fwt8c7DdjoUlY=; b=JgrCPnGch0wpJztRlGmMjAP0u7fD2EAOglwdYoVv+AFG0jSeE0AL8xKGqDbihwT14ri9Sf hHcuwl3a3iC3yLtwxSWrx8Lm87cyICbHBl9L+PE+jm5xlA68D9s2YrKXFL4EzNmsNZFxlv Nfy4Njnc6BG3LLmVYQxh01Jqg9o+u4w= Received: from mail-ej1-f70.google.com (mail-ej1-f70.google.com [209.85.218.70]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-182-kJ-R6DUGMt6OnN7ToOGoog-1; Mon, 25 Jan 2021 10:06:03 -0500 X-MC-Unique: kJ-R6DUGMt6OnN7ToOGoog-1 Received: by mail-ej1-f70.google.com with SMTP id p1so3888627ejo.4 for ; Mon, 25 Jan 2021 07:06:03 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:to:cc:from:subject:message-id:date:user-agent :mime-version:content-language:content-transfer-encoding; bh=oFjXvYPythvzmBsRRSp9UybNAvVnq2Fwt8c7DdjoUlY=; b=LrBaiHbuvtx5Y38uHbt7QSgi5Q9d6a3HrQ55LlglBcYB17fe3fu0WjTcUxAZx/bT7P PukO7mbNylf2xW/0WP0JDXqLM9ecAP2wyNVP5kFULCymqEmrxp2RsGEOgaymvuEtTgeL /RYM55kfDYRuWzFDa6pvSpjp0O2TwwFTqWsGs6wGvpO9sSnFIqmKlK6a2h0QBpnuDfJI xufcX2AMBb2sPpaXYyN1xgz7kyIGQ2PfDip7neV+psN0QRsNqLfU9FPAD+/Ke+RdZ2gj L6vxY7Q34tJuKdIF8noXUvjE+ZM5UvyxUqTG5wM2qfL0PCeAH9qzC0DhQ8MXmwykXssm AvTg== X-Gm-Message-State: AOAM532VuVIKnC28lCeDE3pCRIohc//JmJmsXXNCWRd7RnsARccLyE7D +q7A/EzUzPlatKwKHcjVCVohg6LkI3FD7j4XCzo246R+crrAvFxv7Yb1K0G5YAKN/YDOkWphvpK C11jL9C/vFj+Hmsg= X-Received: by 2002:a17:907:f81:: with SMTP id kb1mr664624ejc.412.1611587161952; Mon, 25 Jan 2021 07:06:01 -0800 (PST) X-Google-Smtp-Source: ABdhPJza6+JNbghUlpSi9DGneheeUvwb89EWIPDQH1y+L6GC0/rKgc6Y6s+SDvDI19HcuDus1CeKGw== X-Received: by 2002:a17:907:f81:: with SMTP id kb1mr664593ejc.412.1611587161650; Mon, 25 Jan 2021 07:06:01 -0800 (PST) Received: from [192.168.1.36] (13.red-83-57-169.dynamicip.rima-tde.net. [83.57.169.13]) by smtp.gmail.com with ESMTPSA id dh14sm10461460edb.11.2021.01.25.07.06.00 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 25 Jan 2021 07:06:00 -0800 (PST) To: Qemu-block , Kevin Wolf , Max Reitz From: =?UTF-8?Q?Philippe_Mathieu-Daud=c3=a9?= Subject: How to check when "raw" format driver uses a "regular" file? Message-ID: <1ccc5e60-65fa-21aa-713d-d5bb575b2594@redhat.com> Date: Mon, 25 Jan 2021 16:05:59 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.6.0 MIME-Version: 1.0 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=philmd@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Received-SPF: pass client-ip=63.128.21.124; envelope-from=philmd@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -30 X-Spam_score: -3.1 X-Spam_bar: --- X-Spam_report: (-3.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.255, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Paolo Bonzini , qemu-devel Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Hi, Is it possible to restrict a block driver to a particular set of options? In my case I'd like to restrict the raw driver to regular files. I noticed the NFS driver does it locally in nfs_client_open(), and FUSE has is_regular_file() -- which is POSIX specific however. When a backend is a SCSI drive, the block layer provide the blk_is_sg() method to test it. 1/ Should I provide a similar blk_is_regular_file()? 2/ There is no oslib function to check for regular file, should I add one too? Thanks, Phil.