From patchwork Fri Jul 29 03:17:22 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: "Michael S. Tsirkin" X-Patchwork-Id: 9251993 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 7FC2660757 for ; Fri, 29 Jul 2016 03:51:24 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 67B9C20243 for ; Fri, 29 Jul 2016 03:51:24 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 5C0DC27F95; Fri, 29 Jul 2016 03:51:24 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id D7EAE20243 for ; Fri, 29 Jul 2016 03:51:23 +0000 (UTC) Received: from localhost ([::1]:56961 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bSypW-0003zZ-Mk for patchwork-qemu-devel@patchwork.kernel.org; Thu, 28 Jul 2016 23:51:22 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:39736) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bSyIh-0006fu-St for qemu-devel@nongnu.org; Thu, 28 Jul 2016 23:17:32 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bSyIf-0003Bu-PH for qemu-devel@nongnu.org; Thu, 28 Jul 2016 23:17:26 -0400 Received: from mx1.redhat.com ([209.132.183.28]:36134) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bSyIf-0003Bq-IB for qemu-devel@nongnu.org; Thu, 28 Jul 2016 23:17:25 -0400 Received: from int-mx10.intmail.prod.int.phx2.redhat.com (int-mx10.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 26D17834; Fri, 29 Jul 2016 03:17:25 +0000 (UTC) Received: from redhat.com (vpn1-4-254.ams2.redhat.com [10.36.4.254]) by int-mx10.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id u6T3HM7W018504; Thu, 28 Jul 2016 23:17:23 -0400 Date: Fri, 29 Jul 2016 06:17:22 +0300 From: "Michael S. Tsirkin" To: qemu-devel@nongnu.org Message-ID: <1469762011-7902-40-git-send-email-mst@redhat.com> References: <1469762011-7902-1-git-send-email-mst@redhat.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <1469762011-7902-1-git-send-email-mst@redhat.com> X-Mutt-Fcc: =sent X-Scanned-By: MIMEDefang 2.68 on 10.5.11.23 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.29]); Fri, 29 Jul 2016 03:17:25 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PULL 39/41] vhost: add vhost_net_set_backend() X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Peter Maydell , Jason Wang , =?iso-8859-1?Q?Marc-Andr=E9?= Lureau Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP From: Marc-André Lureau Not all vhost-user backends support ops->vhost_net_set_backend(). It is a nicer to provide an assert/error than to crash trying to call. Furthermore, it improves a bit the code by hiding vhost_ops details. Signed-off-by: Marc-André Lureau Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin --- include/hw/virtio/vhost.h | 4 ++++ hw/net/vhost_net.c | 9 +++------ hw/virtio/vhost.c | 10 ++++++++++ 3 files changed, 17 insertions(+), 6 deletions(-) diff --git a/include/hw/virtio/vhost.h b/include/hw/virtio/vhost.h index 2106ed8..e433089 100644 --- a/include/hw/virtio/vhost.h +++ b/include/hw/virtio/vhost.h @@ -86,4 +86,8 @@ uint64_t vhost_get_features(struct vhost_dev *hdev, const int *feature_bits, void vhost_ack_features(struct vhost_dev *hdev, const int *feature_bits, uint64_t features); bool vhost_has_free_slot(void); + +int vhost_net_set_backend(struct vhost_dev *hdev, + struct vhost_vring_file *file); + #endif diff --git a/hw/net/vhost_net.c b/hw/net/vhost_net.c index dd41a8e..dc61dc1 100644 --- a/hw/net/vhost_net.c +++ b/hw/net/vhost_net.c @@ -242,8 +242,7 @@ static int vhost_net_start_one(struct vhost_net *net, qemu_set_fd_handler(net->backend, NULL, NULL, NULL); file.fd = net->backend; for (file.index = 0; file.index < net->dev.nvqs; ++file.index) { - const VhostOps *vhost_ops = net->dev.vhost_ops; - r = vhost_ops->vhost_net_set_backend(&net->dev, &file); + r = vhost_net_set_backend(&net->dev, &file); if (r < 0) { r = -errno; goto fail; @@ -255,8 +254,7 @@ fail: file.fd = -1; if (net->nc->info->type == NET_CLIENT_DRIVER_TAP) { while (file.index-- > 0) { - const VhostOps *vhost_ops = net->dev.vhost_ops; - int r = vhost_ops->vhost_net_set_backend(&net->dev, &file); + int r = vhost_net_set_backend(&net->dev, &file); assert(r >= 0); } } @@ -277,8 +275,7 @@ static void vhost_net_stop_one(struct vhost_net *net, if (net->nc->info->type == NET_CLIENT_DRIVER_TAP) { for (file.index = 0; file.index < net->dev.nvqs; ++file.index) { - const VhostOps *vhost_ops = net->dev.vhost_ops; - int r = vhost_ops->vhost_net_set_backend(&net->dev, &file); + int r = vhost_net_set_backend(&net->dev, &file); assert(r >= 0); } } diff --git a/hw/virtio/vhost.c b/hw/virtio/vhost.c index 2d0d1d1..b0e8ecc 100644 --- a/hw/virtio/vhost.c +++ b/hw/virtio/vhost.c @@ -1369,3 +1369,13 @@ void vhost_dev_stop(struct vhost_dev *hdev, VirtIODevice *vdev) vhost_log_put(hdev, true); hdev->started = false; } + +int vhost_net_set_backend(struct vhost_dev *hdev, + struct vhost_vring_file *file) +{ + if (hdev->vhost_ops->vhost_net_set_backend) { + return hdev->vhost_ops->vhost_net_set_backend(hdev, file); + } + + return -1; +}