From nobody Mon Feb 9 10:32:46 2026 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 ARC-Seal: i=1; a=rsa-sha256; t=1658151631; cv=none; d=zohomail.com; s=zohoarc; b=FqYPCYzexBYVq7O4d/P+vtN13J8Hvza2VjHfEJ7TzxZt1wBoGV4YzSkISbsBrFGqgqf28z/ult1Hpv6SZtX/jKrbCot7ApAEvPyWqUE09+japPDjTtpt9eZTHtMhdC0BcwV+uAoaaW9K7ON7hX4hbX4O3ZEdohGN6olPrXZvorQ= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1658151631; h=Content-Type:Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; bh=DMIvkXmmZaOxTsInH4pPo+aXPlzf2WfjoAcbktC0adY=; b=NfblKtDUBAhlk06Xye8B2fb2E8YwcA96LI3/nHQpLJoBfoteJzFAAWaAem+yBT0jNqaWcFw9SVd9d7qt42lHHc38UrDvCFJcigalTTu4O7TfiFq2O4eE6YMO4fZXr1W0K+KE7hSgVRCVqOMI1MXqtH5aB/gGUUyPYzAmIOtOeZE= ARC-Authentication-Results: i=1; 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 header.from= (p=none dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1658151631908701.6071442681172; Mon, 18 Jul 2022 06:40:31 -0700 (PDT) Received: from localhost ([::1]:39252 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oDQz8-0001o6-OR for importer@patchew.org; Mon, 18 Jul 2022 09:40:30 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:45570) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oDQsX-0007HM-5s for qemu-devel@nongnu.org; Mon, 18 Jul 2022 09:33:41 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:58841) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oDQsV-0007N3-Ir for qemu-devel@nongnu.org; Mon, 18 Jul 2022 09:33:40 -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-662-mT2z3pPSNvmPFAWxUbgLsw-1; Mon, 18 Jul 2022 09:33:33 -0400 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.rdu2.redhat.com [10.11.54.6]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id B147D3C0D189; Mon, 18 Jul 2022 13:33:32 +0000 (UTC) Received: from eperezma.remote.csb (unknown [10.39.192.86]) by smtp.corp.redhat.com (Postfix) with ESMTP id D7DDD2166B26; Mon, 18 Jul 2022 13:33:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1658151219; 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=DMIvkXmmZaOxTsInH4pPo+aXPlzf2WfjoAcbktC0adY=; b=ei1JZ5tQu11avabfUZajROx2Owr3o0gtTDZho4TXeiLUdI18FYRJIC3e698CPO8eeRp94U hTfx5Yg4GWagbCUM57Ab5F4tVaMJCv1PK+oRuS48KOHeDkI25WFPVthqm2L1k/6BbND9CJ dHF/n2Tg4urf0pAaFeB4Akrc8TGo/X8= X-MC-Unique: mT2z3pPSNvmPFAWxUbgLsw-1 From: =?UTF-8?q?Eugenio=20P=C3=A9rez?= To: qemu-devel@nongnu.org Cc: Stefano Garzarella , Harpreet Singh Anand , Gautam Dawar , "Gonglei (Arei)" , Stefan Hajnoczi , Liuxiangdong , "Michael S. Tsirkin" , Laurent Vivier , Eli Cohen , Parav Pandit , Paolo Bonzini , Zhu Lingshan , Cornelia Huck , Jason Wang , Cindy Lu , Markus Armbruster , Eric Blake Subject: [PATCH 2/5] vdpa: Extract vhost_vdpa_net_cvq_add from vhost_vdpa_net_handle_ctrl_avail Date: Mon, 18 Jul 2022 15:33:18 +0200 Message-Id: <20220718133321.2902838-3-eperezma@redhat.com> In-Reply-To: <20220718133321.2902838-1-eperezma@redhat.com> References: <20220718133321.2902838-1-eperezma@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 2.78 on 10.11.54.6 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=170.10.133.124; envelope-from=eperezma@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=-0.082, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, 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: 1658151634120100001 So we can reuse to inject state messages. Signed-off-by: Eugenio P=C3=A9rez --- net/vhost-vdpa.c | 71 ++++++++++++++++++++++++++++++------------------ 1 file changed, 44 insertions(+), 27 deletions(-) diff --git a/net/vhost-vdpa.c b/net/vhost-vdpa.c index 986e6414b4..fa00928854 100644 --- a/net/vhost-vdpa.c +++ b/net/vhost-vdpa.c @@ -334,6 +334,43 @@ static bool vhost_vdpa_net_cvq_map_elem(VhostVDPAState= *s, return true; } =20 +static virtio_net_ctrl_ack vhost_vdpa_net_cvq_add(VhostShadowVirtqueue *sv= q, + const struct iovec *dev_buf= fers) +{ + /* in buffer used for device model */ + virtio_net_ctrl_ack status; + size_t dev_written; + int r; + void *unused =3D (void *)1; + + r =3D vhost_svq_add(svq, &dev_buffers[0], 1, &dev_buffers[1], 1, unuse= d); + if (unlikely(r !=3D 0)) { + if (unlikely(r =3D=3D -ENOSPC)) { + qemu_log_mask(LOG_GUEST_ERROR, "%s: No space on device queue\n= ", + __func__); + } + return VIRTIO_NET_ERR; + } + + /* + * We can poll here since we've had BQL from the time we sent the + * descriptor. Also, we need to take the answer before SVQ pulls by it= self, + * when BQL is released + */ + dev_written =3D vhost_svq_poll(svq); + if (unlikely(dev_written < sizeof(status))) { + error_report("Insufficient written data (%zu)", dev_written); + return VIRTIO_NET_ERR; + } + + memcpy(&status, dev_buffers[1].iov_base, sizeof(status)); + if (status !=3D VIRTIO_NET_OK) { + return VIRTIO_NET_ERR; + } + + return VIRTIO_NET_OK; +} + /** * Do not forward commands not supported by SVQ. Otherwise, the device cou= ld * accept it and qemu would not know how to update the device model. @@ -380,19 +417,18 @@ static int vhost_vdpa_net_handle_ctrl_avail(VhostShad= owVirtqueue *svq, void *opaque) { VhostVDPAState *s =3D opaque; - size_t in_len, dev_written; + size_t in_len; virtio_net_ctrl_ack status =3D VIRTIO_NET_ERR; /* out and in buffers sent to the device */ struct iovec dev_buffers[2] =3D { { .iov_base =3D s->cvq_cmd_out_buffer }, { .iov_base =3D s->cvq_cmd_in_buffer }, }; - /* in buffer used for device model */ + /* in buffer seen by virtio-net device model */ const struct iovec in =3D { .iov_base =3D &status, .iov_len =3D sizeof(status), }; - int r; bool ok; =20 ok =3D vhost_vdpa_net_cvq_map_elem(s, elem, dev_buffers); @@ -405,35 +441,16 @@ static int vhost_vdpa_net_handle_ctrl_avail(VhostShad= owVirtqueue *svq, goto out; } =20 - r =3D vhost_svq_add(svq, &dev_buffers[0], 1, &dev_buffers[1], 1, elem); - if (unlikely(r !=3D 0)) { - if (unlikely(r =3D=3D -ENOSPC)) { - qemu_log_mask(LOG_GUEST_ERROR, "%s: No space on device queue\n= ", - __func__); - } - goto out; - } - - /* - * We can poll here since we've had BQL from the time we sent the - * descriptor. Also, we need to take the answer before SVQ pulls by it= self, - * when BQL is released - */ - dev_written =3D vhost_svq_poll(svq); - if (unlikely(dev_written < sizeof(status))) { - error_report("Insufficient written data (%zu)", dev_written); - goto out; - } - - memcpy(&status, dev_buffers[1].iov_base, sizeof(status)); + status =3D vhost_vdpa_net_cvq_add(svq, dev_buffers); if (status !=3D VIRTIO_NET_OK) { goto out; } =20 status =3D VIRTIO_NET_ERR; - virtio_net_handle_ctrl_iov(svq->vdev, &in, 1, dev_buffers, 1); - if (status !=3D VIRTIO_NET_OK) { + in_len =3D virtio_net_handle_ctrl_iov(svq->vdev, &in, 1, dev_buffers, = 1); + if (in_len !=3D sizeof(status) || status !=3D VIRTIO_NET_OK) { error_report("Bad CVQ processing in model"); + return VIRTIO_NET_ERR; } =20 out: @@ -450,7 +467,7 @@ out: if (dev_buffers[1].iov_base) { vhost_vdpa_cvq_unmap_buf(&s->vhost_vdpa, dev_buffers[1].iov_base); } - return r; + return status =3D=3D VIRTIO_NET_OK ? 0 : 1; } =20 static const VhostShadowVirtqueueOps vhost_vdpa_net_svq_ops =3D { --=20 2.31.1