From nobody Wed Dec 17 05:43:41 2025 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=none dis=none) header.from=redhat.com Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1656086165861784.8064671001971; Fri, 24 Jun 2022 08:56:05 -0700 (PDT) Received: from localhost ([::1]:50232 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1o4lfA-0000Hd-O6 for importer@patchew.org; Fri, 24 Jun 2022 11:56:04 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:41440) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1o4lRA-0006Xz-0Z for qemu-devel@nongnu.org; Fri, 24 Jun 2022 11:41:36 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]:20071) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1o4lR4-0000sn-FN for qemu-devel@nongnu.org; Fri, 24 Jun 2022 11:41:35 -0400 Received: from mimecast-mx02.redhat.com (mx3-rdu2.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-265-N5KNe1t8PkqX-Db1zoETkg-1; Fri, 24 Jun 2022 11:41:27 -0400 Received: from smtp.corp.redhat.com (int-mx09.intmail.prod.int.rdu2.redhat.com [10.11.54.9]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id DEE652919EA7; Fri, 24 Jun 2022 15:41:26 +0000 (UTC) Received: from merkur.fritz.box (unknown [10.39.194.34]) by smtp.corp.redhat.com (Postfix) with ESMTP id 4AA7A492C3B; Fri, 24 Jun 2022 15:41:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1656085289; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=RmSk+tUEqXiBalaaOmEjXLxaJWQNJUFlikSGSiwR69g=; b=JxUwdjCnVxLDZuh+Uy9AALq2aIPmPU1Q4fkrKhdR54Dvn7T+Ypf7v0tNRdpeULG9hDNN4V 4Cb/tBSLEJke77zRoo1L50XrNW2NoBrxD1n6c+n9yWoxPOIJkbUttyil6UdVPcmsBt0Kqz F5v7bITYIbZBl6VsaebjbM7810V+7Lc= X-MC-Unique: N5KNe1t8PkqX-Db1zoETkg-1 From: Kevin Wolf To: qemu-block@nongnu.org Cc: kwolf@redhat.com, qemu-devel@nongnu.org Subject: [PULL v2 14/20] qsd: document vduse-blk exports Date: Fri, 24 Jun 2022 17:40:57 +0200 Message-Id: <20220624154103.185902-15-kwolf@redhat.com> In-Reply-To: <20220624154103.185902-1-kwolf@redhat.com> References: <20220624154103.185902-1-kwolf@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 2.85 on 10.11.54.9 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.129.124; envelope-from=kwolf@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -28 X-Spam_score: -2.9 X-Spam_bar: -- X-Spam_report: (-2.9 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.082, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, 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+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1656086167010100001 Content-Type: text/plain; charset="utf-8" From: Stefan Hajnoczi Document vduse-blk exports in qemu-storage-daemon --help and the qemu-storage-daemon(1) man page. Based-on: <20220523084611.91-1-xieyongji@bytedance.com> Cc: Xie Yongji Signed-off-by: Stefan Hajnoczi Message-Id: <20220525121947.859820-1-stefanha@redhat.com> Signed-off-by: Kevin Wolf --- docs/tools/qemu-storage-daemon.rst | 21 +++++++++++++++++++++ storage-daemon/qemu-storage-daemon.c | 9 +++++++++ 2 files changed, 30 insertions(+) diff --git a/docs/tools/qemu-storage-daemon.rst b/docs/tools/qemu-storage-d= aemon.rst index 8b97592663..fbeaf76954 100644 --- a/docs/tools/qemu-storage-daemon.rst +++ b/docs/tools/qemu-storage-daemon.rst @@ -77,6 +77,7 @@ Standard options: --export [type=3D]vhost-user-blk,id=3D,node-name=3D,addr.= type=3Dunix,addr.path=3D[,writable=3Don|off][,logical-block-si= ze=3D][,num-queues=3D] --export [type=3D]vhost-user-blk,id=3D,node-name=3D,addr.= type=3Dfd,addr.str=3D[,writable=3Don|off][,logical-block-size=3D][,num-queues=3D] --export [type=3D]fuse,id=3D,node-name=3D,mountpoint=3D[,growable=3Don|off][,writable=3Don|off][,allow-other=3Don|off|auto] + --export [type=3D]vduse-blk,id=3D,node-name=3D[,writable= =3Don|off][,num-queues=3D][,queue-size=3D][,logical= -block-size=3D] =20 is a block export definition. ``node-name`` is the block node that shoul= d be exported. ``writable`` determines whether or not the export allows write @@ -110,6 +111,26 @@ Standard options: ``allow-other`` to auto (the default) will try enabling this option, and= on error fall back to disabling it. =20 + The ``vduse-blk`` export type uses the ``id`` as the VDUSE device name. + ``num-queues`` sets the number of virtqueues (the default is 1). + ``queue-size`` sets the virtqueue descriptor table size (the default is = 256). + + The instantiated VDUSE device must then be added to the vDPA bus using t= he + vdpa(8) command from the iproute2 project:: + + # vdpa dev add name mgmtdev vduse + + The device can be removed from the vDPA bus later as follows:: + + # vdpa dev del + + For more information about attaching vDPA devices to the host with + virtio_vdpa.ko or attaching them to guests with vhost_vdpa.ko, see + https://vdpa-dev.gitlab.io/. + + For more information about VDUSE, see + https://docs.kernel.org/userspace-api/vduse.html. + .. option:: --monitor MONITORDEF =20 is a QMP monitor definition. See the :manpage:`qemu(1)` manual page for diff --git a/storage-daemon/qemu-storage-daemon.c b/storage-daemon/qemu-sto= rage-daemon.c index c104817cdd..17fd3f2f5f 100644 --- a/storage-daemon/qemu-storage-daemon.c +++ b/storage-daemon/qemu-storage-daemon.c @@ -121,6 +121,15 @@ static void help(void) " vhost-user-blk device over file descriptor\n" "\n" #endif /* CONFIG_VHOST_USER_BLK_SERVER */ +#ifdef CONFIG_VDUSE_BLK_EXPORT +" --export [type=3D]vduse-blk,id=3D,node-name=3D\n" +" [,writable=3Don|off][,num-queues=3D]\n" +" [,queue-size=3D]\n" +" [,logical-block-size=3D]\n" +" export the specified block node as a vduse-blk\n" +" device using the id as the VDUSE device name\n" +"\n" +#endif /* CONFIG_VDUSE_BLK_EXPORT */ " --monitor [chardev=3D]name[,mode=3Dcontrol][,pretty[=3Don|off]]\n" " configure a QMP monitor\n" "\n" --=20 2.35.3