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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]:38326 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kT1xn-0001ga-6f for qemu-devel@archiver.kernel.org; Thu, 15 Oct 2020 08:02:31 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:56414) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kT1wl-00019B-T7 for qemu-devel@nongnu.org; Thu, 15 Oct 2020 08:01:27 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:30053) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1kT1wg-0004aP-Cu for qemu-devel@nongnu.org; Thu, 15 Oct 2020 08:01:27 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1602763281; 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: in-reply-to:in-reply-to:references:references; bh=GRrD5EBy87hrHyMArOhZ8Cg2Fqja5X0bd8Cyd/fumM8=; b=Tayxt2MFZLTHGcDo+DR5H3HmbZckg3veOOZaUJoCPhVuDKl1mSDosQH1EKvxDFTCHTzIDF dYpoOpGDL1FY84+Fa5sTRZ9ocCbh4biL5IWeL0w4dcdngYF9lPx7Yfou6ASlmx+qdxofD3 BgaC2Lp1obi8ROZALEX2BBUudMdY6WE= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-341-5dO-novxOpm_KGzHFDA_Rg-1; Thu, 15 Oct 2020 08:01:07 -0400 X-MC-Unique: 5dO-novxOpm_KGzHFDA_Rg-1 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 78129106B349; Thu, 15 Oct 2020 12:01:04 +0000 (UTC) Received: from merkur.fritz.box (ovpn-114-163.ams2.redhat.com [10.36.114.163]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 692201992F; Thu, 15 Oct 2020 12:01:03 +0000 (UTC) Date: Thu, 15 Oct 2020 14:01:01 +0200 From: Kevin Wolf To: Max Reitz Subject: Re: [PATCH v2 00/20] block/export: Allow exporting BDSs via FUSE Message-ID: <20201015120101.GG4610@merkur.fritz.box> References: <20200922104932.46384-1-mreitz@redhat.com> MIME-Version: 1.0 In-Reply-To: <20200922104932.46384-1-mreitz@redhat.com> X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=kwolf@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=216.205.24.124; envelope-from=kwolf@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/10/15 02:38:26 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, 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: Stefan Hajnoczi , qemu-devel@nongnu.org, qemu-block@nongnu.org Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Am 22.09.2020 um 12:49 hat Max Reitz geschrieben: > Based-on: <20200907182011.521007-1-kwolf@redhat.com> > (“block/export: Add infrastructure and QAPI for block exports”) > > (Though its patch 16 needs a s/= \&blk_exp_nbd/= drv/ on top.) > > v1: https://lists.nongnu.org/archive/html/qemu-block/2019-12/msg00451.html > > Branch: https://github.com/XanClic/qemu.git fuse-exports-v2 > Branch: https://git.xanclic.moe/XanClic/qemu.git fuse-exports-v2 > > > Hi, > > Ever since I found out that you can mount FUSE filesystems on regular > files (not just directories), I had the idea of adding FUSE block > exports to qemu where you can export block nodes as raw images. The > best thing is that you’d be able to mount an image on itself, so > whatever format it may be in, qemu lets it appear as a raw image (and > you can then use regular tools like dd on it). > > The performance is quite bad so far, but we can always try to improve it > if the need arises. For now I consider it mostly a cute feature to get > easy access to the raw contents of image files in any format (without > requiring root rights). > > In this version (as opposed to v1 linked above), I integrated the FUSE > export code into Kevin’s proposed common infrastructure for block > exports. Patches 5-16, 19 and 20: Reviewed-by: Kevin Wolf