From patchwork Sun Mar 12 16:34:01 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maxime Coquelin X-Patchwork-Id: 21711 X-Patchwork-Delegate: yuanhan.liu@linux.intel.com Return-Path: X-Original-To: patchwork@dpdk.org Delivered-To: patchwork@dpdk.org Received: from [92.243.14.124] (localhost [IPv6:::1]) by dpdk.org (Postfix) with ESMTP id DCF35D088; Sun, 12 Mar 2017 17:35:05 +0100 (CET) Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by dpdk.org (Postfix) with ESMTP id 82EB4CF7A for ; Sun, 12 Mar 2017 17:34:30 +0100 (CET) Received: from smtp.corp.redhat.com (int-mx16.intmail.prod.int.phx2.redhat.com [10.5.11.28]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id EDA743B714; Sun, 12 Mar 2017 16:34:30 +0000 (UTC) Received: from max-t460s.redhat.com (ovpn-116-39.ams2.redhat.com [10.36.116.39]) by smtp.corp.redhat.com (Postfix) with ESMTP id 206402D5C4; Sun, 12 Mar 2017 16:34:27 +0000 (UTC) From: Maxime Coquelin To: aconole@redhat.com, sodey@sonusnet.com, yuanhan.liu@linux.intel.com, jianfeng.tan@intel.com, thomas.monjalon@6wind.com, dev@dpdk.org Cc: Maxime Coquelin Date: Sun, 12 Mar 2017 17:34:01 +0100 Message-Id: <20170312163406.17714-5-maxime.coquelin@redhat.com> In-Reply-To: <20170312163406.17714-1-maxime.coquelin@redhat.com> References: <20170213142820.8964-1-maxime.coquelin@redhat.com> <20170312163406.17714-1-maxime.coquelin@redhat.com> X-Scanned-By: MIMEDefang 2.74 on 10.5.11.28 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.30]); Sun, 12 Mar 2017 16:34:31 +0000 (UTC) Subject: [dpdk-dev] [PATCH v3 4/9] vhost: Add API to get MTU value X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" This patch implements the function for the application to get the MTU value. rte_vhost_get_mtu() fills the mtu parameter with the MTU value set in QEMU if VIRTIO_NET_F_MTU has been negotiated and returns 0, -ENOTSUP otherwise. The function returns -EAGAIN if Virtio feature negotiation didn't happened yet. Signed-off-by: Maxime Coquelin --- lib/librte_vhost/rte_virtio_net.h | 15 +++++++++++++++ lib/librte_vhost/vhost.c | 19 +++++++++++++++++++ 2 files changed, 34 insertions(+) diff --git a/lib/librte_vhost/rte_virtio_net.h b/lib/librte_vhost/rte_virtio_net.h index 926039c..56829aa 100644 --- a/lib/librte_vhost/rte_virtio_net.h +++ b/lib/librte_vhost/rte_virtio_net.h @@ -100,6 +100,21 @@ int rte_vhost_driver_callback_register(struct virtio_net_device_ops const * cons int rte_vhost_driver_session_start(void); /** + * Get the MTU value of the device if set in QEMU. + * + * @param vid + * virtio-net device ID + * @param mtu + * The variable to store the MTU value + * + * @return + * 0: success + * -EAGAIN: device not yet started + * -ENOTSUP: device does not support MTU feature + */ +int rte_vhost_get_mtu(int vid, uint16_t *mtu); + +/** * Get the numa node from which the virtio net device's memory * is allocated. * diff --git a/lib/librte_vhost/vhost.c b/lib/librte_vhost/vhost.c index 3974087..80a75e0 100644 --- a/lib/librte_vhost/vhost.c +++ b/lib/librte_vhost/vhost.c @@ -313,6 +313,25 @@ vhost_enable_dequeue_zero_copy(int vid) } int +rte_vhost_get_mtu(int vid, uint16_t *mtu) +{ + struct virtio_net *dev = get_device(vid); + + if (!dev) + return -ENODEV; + + if (!(dev->flags & VIRTIO_DEV_READY)) + return -EAGAIN; + + if (!(dev->features & VIRTIO_NET_F_MTU)) + return -ENOTSUP; + + *mtu = dev->mtu; + + return 0; +} + +int rte_vhost_get_numa_node(int vid) { #ifdef RTE_LIBRTE_VHOST_NUMA