From mboxrd@z Thu Jan 1 00:00:00 1970 From: Junjie Chen Subject: [PATCH v3] net/vhost: fix segfault when creating vdev dynamically Date: Fri, 30 Mar 2018 14:58:31 +0800 Message-ID: <20180330065831.107558-1-junjie.j.chen@intel.com> References: <20180329153544.270488-1-junjie.j.chen@intel.com> Cc: dev@dpdk.org, Junjie Chen , Chen@dpdk.org To: jianfeng.tan@intel.com, maxime.coquelin@redhat.com, mtetsuyah@gmail.com Return-path: Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) by dpdk.org (Postfix) with ESMTP id AB90D1D7 for ; Fri, 30 Mar 2018 08:59:23 +0200 (CEST) In-Reply-To: <20180329153544.270488-1-junjie.j.chen@intel.com> 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 creating vdev dynamically, vhost pmd driver starts directly without checking TX/RX queues are ready or not, and thus causes segmentation fault when vhost library accesses queues. This patch adds a flag to check whether queues are setup or not, and adds queues setup into dev_start function to allow user to start them after setting up. Fixes: aed0b12930b3 ("net/vhost: fix socket file deleted on stop") Signed-off-by: Chen, Junjie --- Changes in v3: - Update commit log, refine duplicated code Changes in v2: - Check queues status in new_device, create queue in dev_start if not setup yet drivers/net/vhost/rte_eth_vhost.c | 69 ++++++++++++++++++++++++++------------- 1 file changed, 46 insertions(+), 23 deletions(-) diff --git a/drivers/net/vhost/rte_eth_vhost.c b/drivers/net/vhost/rte_eth_vhost.c index 3aae01c39..11b607650 100644 --- a/drivers/net/vhost/rte_eth_vhost.c +++ b/drivers/net/vhost/rte_eth_vhost.c @@ -117,6 +117,7 @@ struct pmd_internal { char *dev_name; char *iface_name; uint16_t max_queues; + uint16_t vid; rte_atomic32_t started; }; @@ -527,8 +528,10 @@ update_queuing_status(struct rte_eth_dev *dev) unsigned int i; int allow_queuing = 1; - if (rte_atomic32_read(&internal->started) == 0 || - rte_atomic32_read(&internal->dev_attached) == 0) + if (rte_atomic32_read(&internal->dev_attached) == 0) + return; + + if (rte_atomic32_read(&internal->started) == 0) allow_queuing = 0; /* Wait until rx/tx_pkt_burst stops accessing vhost device */ @@ -551,13 +554,36 @@ update_queuing_status(struct rte_eth_dev *dev) } } +static void +queue_setup(struct rte_eth_dev *eth_dev, struct pmd_internal *internal) +{ + struct vhost_queue *vq; + int i; + + for (i = 0; i < eth_dev->data->nb_rx_queues; i++) { + vq = eth_dev->data->rx_queues[i]; + if (!vq) + continue; + vq->vid = internal->vid; + vq->internal = internal; + vq->port = eth_dev->data->port_id; + } + for (i = 0; i < eth_dev->data->nb_tx_queues; i++) { + vq = eth_dev->data->tx_queues[i]; + if (!vq) + continue; + vq->vid = internal->vid; + vq->internal = internal; + vq->port = eth_dev->data->port_id; + } +} + static int new_device(int vid) { struct rte_eth_dev *eth_dev; struct internal_list *list; struct pmd_internal *internal; - struct vhost_queue *vq; unsigned i; char ifname[PATH_MAX]; #ifdef RTE_LIBRTE_VHOST_NUMA @@ -580,21 +606,13 @@ new_device(int vid) eth_dev->data->numa_node = newnode; #endif - for (i = 0; i < eth_dev->data->nb_rx_queues; i++) { - vq = eth_dev->data->rx_queues[i]; - if (vq == NULL) - continue; - vq->vid = vid; - vq->internal = internal; - vq->port = eth_dev->data->port_id; - } - for (i = 0; i < eth_dev->data->nb_tx_queues; i++) { - vq = eth_dev->data->tx_queues[i]; - if (vq == NULL) - continue; - vq->vid = vid; - vq->internal = internal; - vq->port = eth_dev->data->port_id; + internal->vid = vid; + if (eth_dev->data->rx_queues && eth_dev->data->tx_queues) { + queue_setup(eth_dev, internal); + rte_atomic32_set(&internal->dev_attached, 1); + } else { + RTE_LOG(INFO, PMD, "RX/TX queues have not setup yet\n"); + rte_atomic32_set(&internal->dev_attached, 0); } for (i = 0; i < rte_vhost_get_vring_num(vid); i++) @@ -604,7 +622,6 @@ new_device(int vid) eth_dev->data->dev_link.link_status = ETH_LINK_UP; - rte_atomic32_set(&internal->dev_attached, 1); update_queuing_status(eth_dev); RTE_LOG(INFO, PMD, "Vhost device %d created\n", vid); @@ -634,8 +651,9 @@ destroy_device(int vid) eth_dev = list->eth_dev; internal = eth_dev->data->dev_private; - rte_atomic32_set(&internal->dev_attached, 0); + rte_atomic32_set(&internal->started, 0); update_queuing_status(eth_dev); + rte_atomic32_set(&internal->dev_attached, 0); eth_dev->data->dev_link.link_status = ETH_LINK_DOWN; @@ -770,12 +788,17 @@ rte_eth_vhost_get_vid_from_port_id(uint16_t port_id) } static int -eth_dev_start(struct rte_eth_dev *dev) +eth_dev_start(struct rte_eth_dev *eth_dev) { - struct pmd_internal *internal = dev->data->dev_private; + struct pmd_internal *internal = eth_dev->data->dev_private; + + if (unlikely(rte_atomic32_read(&internal->dev_attached) == 0)) { + queue_setup(eth_dev, internal); + rte_atomic32_set(&internal->dev_attached, 1); + } rte_atomic32_set(&internal->started, 1); - update_queuing_status(dev); + update_queuing_status(eth_dev); return 0; } -- 2.16.0