From patchwork Thu Mar 15 09:45:14 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Yang, Zhiyong" X-Patchwork-Id: 36122 Return-Path: X-Original-To: patchwork@dpdk.org Delivered-To: patchwork@dpdk.org Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id A37707D30; Thu, 15 Mar 2018 10:45:29 +0100 (CET) Received: from mga06.intel.com (mga06.intel.com [134.134.136.31]) by dpdk.org (Postfix) with ESMTP id 27A745F69 for ; Thu, 15 Mar 2018 10:45:27 +0100 (CET) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga008.jf.intel.com ([10.7.209.65]) by orsmga104.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 15 Mar 2018 02:45:26 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.48,310,1517904000"; d="scan'208";a="25460443" Received: from dpdk9.bj.intel.com ([172.16.182.183]) by orsmga008.jf.intel.com with ESMTP; 15 Mar 2018 02:45:25 -0700 From: zhiyong.yang@intel.com To: dev@dpdk.org Cc: maxime.coquelin@redhat.com, jianfeng.tan@intel.com, dong1.wang@intel.com, zhihong.wang@intel.com, thomas@monjalon.net, Zhiyong Yang Date: Thu, 15 Mar 2018 17:45:14 +0800 Message-Id: <20180315094514.50417-6-zhiyong.yang@intel.com> X-Mailer: git-send-email 2.14.3 In-Reply-To: <20180315094514.50417-1-zhiyong.yang@intel.com> References: <20180214145330.4679-2-zhiyong.yang@intel.com> <20180315094514.50417-1-zhiyong.yang@intel.com> Subject: [dpdk-dev] [PATCH v2 5/5] net/vhost: add memory checking 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" When vhost user PMD works in client mode to connect/reconnect virtio-user with server mode, new thread sometimes may run to new_device before queue_setup has been done, So have to wait until memory allocation is done. Release note is updated in the patch. Signed-off-by: Zhiyong Yang --- doc/guides/rel_notes/release_18_05.rst | 7 +++++++ drivers/net/vhost/rte_eth_vhost.c | 9 +++++++++ 2 files changed, 16 insertions(+) diff --git a/doc/guides/rel_notes/release_18_05.rst b/doc/guides/rel_notes/release_18_05.rst index 3923dc253..7b301f021 100644 --- a/doc/guides/rel_notes/release_18_05.rst +++ b/doc/guides/rel_notes/release_18_05.rst @@ -41,6 +41,13 @@ New Features Also, make sure to start the actual text at the margin. ========================================================= +* **Added support for virtio-user server mode.** + + In a container environment if the vhost-user backend restarts, there's no way + for it to reconnect to virtio-user. To address this, support for server mode + is added. In this mode the socket file is created by virtio-user, which the + backend then connects to. This means that if the backend restarts, it can + reconnect to virtio-user and continue communications. API Changes ----------- diff --git a/drivers/net/vhost/rte_eth_vhost.c b/drivers/net/vhost/rte_eth_vhost.c index 3aae01c39..2490bad0b 100644 --- a/drivers/net/vhost/rte_eth_vhost.c +++ b/drivers/net/vhost/rte_eth_vhost.c @@ -580,6 +580,15 @@ new_device(int vid) eth_dev->data->numa_node = newnode; #endif + /* The thread may run here before eth_dev->data->rx_queues or + * eth_dev->data->tx_queues have gotten valid memory, so have to + * wait until memory allocation is done. + */ + while (!eth_dev->data->rx_queues || + !eth_dev->data->tx_queues) { + usleep(1); + } + for (i = 0; i < eth_dev->data->nb_rx_queues; i++) { vq = eth_dev->data->rx_queues[i]; if (vq == NULL)