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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 346CDC48BC3 for ; Mon, 19 Feb 2024 20:42:45 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1rcATC-0008UP-0i; Mon, 19 Feb 2024 15:42:34 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1rcAT8-0008U0-AL for qemu-devel@nongnu.org; Mon, 19 Feb 2024 15:42:30 -0500 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1rcAT3-0005BF-Cz for qemu-devel@nongnu.org; Mon, 19 Feb 2024 15:42:26 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1708375344; 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=XuDTBkw1wSaPCP1GHtjMVNOMx8kMwUG0AeUDb913NWg=; b=FPmXVNWWmc6eEgbVrpHORN4qdK9U/xnpt72j1CSiUVXmqv8SGrEVZuYLqUjaNNyBUXpXd1 i2M1EEeMPoqUhKkRYN0FoHKXcYxJ85ovaUdWie3nUexJICj5f9ebo/WTimKR80wrN9oaVT 9dERWvg+6OWKk5vtiWcCB6KonoI2Wa0= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-33-Bq-PQy1uMaebWrS0teWnRQ-1; Mon, 19 Feb 2024 15:42:21 -0500 X-MC-Unique: Bq-PQy1uMaebWrS0teWnRQ-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.rdu2.redhat.com [10.11.54.4]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 6024B85A58A; Mon, 19 Feb 2024 20:42:21 +0000 (UTC) Received: from blackfin.pond.sub.org (unknown [10.39.192.55]) by smtp.corp.redhat.com (Postfix) with ESMTPS id CF2E82026D06; Mon, 19 Feb 2024 20:42:20 +0000 (UTC) Received: by blackfin.pond.sub.org (Postfix, from userid 1000) id BEC8021E66D0; Mon, 19 Feb 2024 21:42:19 +0100 (CET) From: Markus Armbruster To: Sam Li Cc: Markus Armbruster , qemu-devel@nongnu.org, dlemoal@kernel.org, Hanna Reitz , dmitry.fomichev@wdc.com, qemu-block@nongnu.org, Eric Blake , hare@suse.de, Kevin Wolf , stefanha@redhat.com Subject: Re: [PATCH v7 2/4] qcow2: add configurations for zoned format extension In-Reply-To: (Sam Li's message of "Mon, 19 Feb 2024 17:09:58 +0100") References: <20240122184830.40094-1-faithilikerun@gmail.com> <20240122184830.40094-3-faithilikerun@gmail.com> <87plwsfyyv.fsf@pond.sub.org> <87edd8fyme.fsf@pond.sub.org> <877cj0jz5u.fsf@pond.sub.org> <87a5nwh2h6.fsf@pond.sub.org> Date: Mon, 19 Feb 2024 21:42:19 +0100 Message-ID: <87o7ccfaok.fsf@pond.sub.org> User-Agent: Gnus/5.13 (Gnus v5.13) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.4 Received-SPF: pass client-ip=170.10.129.124; envelope-from=armbru@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -21 X-Spam_score: -2.2 X-Spam_bar: -- X-Spam_report: (-2.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.072, 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_H2=-0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sam Li writes: > Markus Armbruster =E4=BA=8E2024=E5=B9=B42=E6=9C=8819= =E6=97=A5=E5=91=A8=E4=B8=80 16:56=E5=86=99=E9=81=93=EF=BC=9A >> >> Sam Li writes: >> >> > Markus Armbruster =E4=BA=8E2024=E5=B9=B42=E6=9C=88= 19=E6=97=A5=E5=91=A8=E4=B8=80 15:40=E5=86=99=E9=81=93=EF=BC=9A >> >> >> >> Sam Li writes: >> >> >> >> > Markus Armbruster =E4=BA=8E2024=E5=B9=B42=E6=9C= =8819=E6=97=A5=E5=91=A8=E4=B8=80 13:05=E5=86=99=E9=81=93=EF=BC=9A >> >> >> >> >> >> One more thing... >> >> >> >> >> >> Markus Armbruster writes: >> >> >> >> >> >> > I apologize for the delayed review. >> >> > >> >> > No problems. Thanks for reviewing! >> >> > >> >> >> > >> >> >> > Sam Li writes: >> >> >> > >> >> >> >> To configure the zoned format feature on the qcow2 driver, it >> >> >> >> requires settings as: the device size, zone model, zone size, >> >> >> >> zone capacity, number of conventional zones, limits on zone >> >> >> >> resources (max append bytes, max open zones, and max_active_zon= es). >> >> >> >> >> >> >> >> To create a qcow2 image with zoned format feature, use command = like >> >> >> >> this: >> >> >> >> qemu-img create -f qcow2 zbc.qcow2 -o size=3D768M \ >> >> >> >> -o zone.size=3D64M -o zone.capacity=3D64M -o zone.conventional_= zones=3D0 \ >> >> >> >> -o zone.max_append_bytes=3D4096 -o zone.max_open_zones=3D6 \ >> >> >> >> -o zone.max_active_zones=3D8 -o zone.mode=3Dhost-managed >> >> >> >> >> >> >> >> Signed-off-by: Sam Li >> >> >> > >> >> >> > [...] >> >> >> > >> >> >> >> diff --git a/qapi/block-core.json b/qapi/block-core.json >> >> >> >> index ca390c5700..e2e0ec21a5 100644 >> >> >> >> --- a/qapi/block-core.json >> >> >> >> +++ b/qapi/block-core.json >> >> >> >> @@ -5038,6 +5038,67 @@ >> >> >> >> { 'enum': 'Qcow2CompressionType', >> >> >> >> 'data': [ 'zlib', { 'name': 'zstd', 'if': 'CONFIG_ZSTD' } ] } >> >> >> >> >> >> >> >> +## >> >> >> >> +# @Qcow2ZoneModel: >> >> >> >> +# >> >> >> >> +# Zoned device model used in qcow2 image file >> >> >> >> +# >> >> >> >> +# @host-managed: The host-managed model only allows sequential= write over the >> >> >> >> +# device zones. >> >> >> >> +# >> >> >> >> +# Since 8.2 >> >> >> >> +## >> >> >> >> +{ 'enum': 'Qcow2ZoneModel', >> >> >> >> + 'data': [ 'host-managed'] } >> >> >> >> + >> >> >> >> +## >> >> >> >> +# @Qcow2ZoneHostManaged: >> >> >> >> +# >> >> >> >> +# The host-managed zone model. It only allows sequential writ= es. >> >> >> >> +# >> >> >> >> +# @size: Total number of bytes within zones. >> >> >> > >> >> >> > Default? >> >> > >> >> > It should be set by users. No default value provided. If it's unset >> >> > then it is zero and an error will be returned. >> >> >> >> If the user must provide @size, why is it optional then? >> > >> > It is not optional when the zone model is host-managed. If it's >> > non-zoned, then we don't care about zone info. I am not sure how to >> > make it unoptional. >> >> We have: >> >> blockdev-create argument @options of type BlockdevCreateOptions >> >> BlockdevCreateOptions union branch @qcow2 of type >> BlockdevCreateOptionsQcow2, union tag member is @driver >> >> BlockdevCreateOptionsQcow2 optional member @zone of type >> Qcow2ZoneCreateOptions, default not zoned >> >> Qcow2ZoneCreateOptions union branch @host-managed of type >> Qcow2ZoneHostManaged, union tag member is @mode >> >> Qcow2ZoneHostManaged optional member @size of type size. >> >> Making this member @size mandatory means we must specify it when >> BlockdevCreateOptionsQcow2 member @zone is present and @zone's member >> @mode is "host-managed". Feels right to me. Am I missing anything? > > That's right. And the checks when creating such an img can help do > that. It's not specified in the .json file directly. What would break if we did specify it in the QAPI schema directly? [...]