From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga07.intel.com (mga07.intel.com [134.134.136.100]) by dpdk.org (Postfix) with ESMTP id DA2731D7 for ; Thu, 8 Nov 2018 03:04:56 +0100 (CET) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga007.jf.intel.com ([10.7.209.58]) by orsmga105.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 07 Nov 2018 18:04:56 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.54,478,1534834800"; d="scan'208";a="87539116" Received: from dpdk26.sh.intel.com ([10.67.110.161]) by orsmga007.jf.intel.com with ESMTP; 07 Nov 2018 18:04:54 -0800 From: Wenzhuo Lu To: dev@dpdk.org Cc: Wenzhuo Lu Date: Thu, 8 Nov 2018 10:09:14 +0800 Message-Id: <1541642954-37497-2-git-send-email-wenzhuo.lu@intel.com> X-Mailer: git-send-email 1.9.3 In-Reply-To: <1541642954-37497-1-git-send-email-wenzhuo.lu@intel.com> References: <1531373220-42150-1-git-send-email-wenzhuo.lu@intel.com> <1541642954-37497-1-git-send-email-wenzhuo.lu@intel.com> Subject: [dpdk-dev] [PATCH v3 2/2] ethdev: device configuration enhancement 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: , X-List-Received-Date: Thu, 08 Nov 2018 02:04:57 -0000 The new configuration is stored during the process. But the process may fail. We better rolling the configuration back as the new one doesn't take effect. Signed-off-by: Wenzhuo Lu --- lib/librte_ethdev/rte_ethdev.c | 59 ++++++++++++++++++++++++++++++------------ 1 file changed, 43 insertions(+), 16 deletions(-) diff --git a/lib/librte_ethdev/rte_ethdev.c b/lib/librte_ethdev/rte_ethdev.c index f181c21..e2e7b04 100644 --- a/lib/librte_ethdev/rte_ethdev.c +++ b/lib/librte_ethdev/rte_ethdev.c @@ -1092,8 +1092,10 @@ struct rte_eth_dev * { struct rte_eth_dev *dev; struct rte_eth_dev_info dev_info; + struct rte_eth_conf orig_conf; struct rte_eth_conf local_conf = *dev_conf; int diag; + int ret; RTE_ETH_VALID_PORTID_OR_ERR_RET(port_id, -EINVAL); @@ -1106,12 +1108,16 @@ struct rte_eth_dev * RTE_ETHDEV_LOG(ERR, "Port %u must be stopped to allow configuration\n", port_id); - return -EBUSY; + ret = -EBUSY; + goto fail; } /* Copy the dev_conf parameter into the dev structure, * then get the info. + * But restore the original configure first, as rollback is needed + * when failure happens. */ + memcpy(&orig_conf, &dev->data->dev_conf, sizeof(dev->data->dev_conf)); memcpy(&dev->data->dev_conf, &local_conf, sizeof(dev->data->dev_conf)); rte_eth_dev_info_get(port_id, &dev_info); @@ -1134,14 +1140,16 @@ struct rte_eth_dev * RTE_ETHDEV_LOG(ERR, "Number of RX queues requested (%u) is greater than max supported(%d)\n", nb_rx_q, RTE_MAX_QUEUES_PER_PORT); - return -EINVAL; + ret = -EINVAL; + goto rollback; } if (nb_tx_q > RTE_MAX_QUEUES_PER_PORT) { RTE_ETHDEV_LOG(ERR, "Number of TX queues requested (%u) is greater than max supported(%d)\n", nb_tx_q, RTE_MAX_QUEUES_PER_PORT); - return -EINVAL; + ret = -EINVAL; + goto rollback; } /* @@ -1152,13 +1160,15 @@ struct rte_eth_dev * if (nb_rx_q > dev_info.max_rx_queues) { RTE_ETHDEV_LOG(ERR, "Ethdev port_id=%u nb_rx_queues=%u > %u\n", port_id, nb_rx_q, dev_info.max_rx_queues); - return -EINVAL; + ret = -EINVAL; + goto rollback; } if (nb_tx_q > dev_info.max_tx_queues) { RTE_ETHDEV_LOG(ERR, "Ethdev port_id=%u nb_tx_queues=%u > %u\n", port_id, nb_tx_q, dev_info.max_tx_queues); - return -EINVAL; + ret = -EINVAL; + goto rollback; } /* Check that the device supports requested interrupts */ @@ -1166,13 +1176,15 @@ struct rte_eth_dev * (!(dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC))) { RTE_ETHDEV_LOG(ERR, "Driver %s does not support lsc\n", dev->device->driver->name); - return -EINVAL; + ret = -EINVAL; + goto rollback; } if ((dev_conf->intr_conf.rmv == 1) && (!(dev->data->dev_flags & RTE_ETH_DEV_INTR_RMV))) { RTE_ETHDEV_LOG(ERR, "Driver %s does not support rmv\n", dev->device->driver->name); - return -EINVAL; + ret = -EINVAL; + goto rollback; } /* @@ -1185,13 +1197,15 @@ struct rte_eth_dev * "Ethdev port_id=%u max_rx_pkt_len %u > max valid value %u\n", port_id, dev_conf->rxmode.max_rx_pkt_len, dev_info.max_rx_pktlen); - return -EINVAL; + ret = -EINVAL; + goto rollback; } else if (dev_conf->rxmode.max_rx_pkt_len < ETHER_MIN_LEN) { RTE_ETHDEV_LOG(ERR, "Ethdev port_id=%u max_rx_pkt_len %u < min valid value %u\n", port_id, dev_conf->rxmode.max_rx_pkt_len, (unsigned)ETHER_MIN_LEN); - return -EINVAL; + ret = -EINVAL; + goto rollback; } } else { if (dev_conf->rxmode.max_rx_pkt_len < ETHER_MIN_LEN || @@ -1210,7 +1224,8 @@ struct rte_eth_dev * port_id, local_conf.rxmode.offloads, dev_info.rx_offload_capa, __func__); - return -EINVAL; + ret = -EINVAL; + goto rollback; } if ((local_conf.txmode.offloads & dev_info.tx_offload_capa) != local_conf.txmode.offloads) { @@ -1220,7 +1235,8 @@ struct rte_eth_dev * port_id, local_conf.txmode.offloads, dev_info.tx_offload_capa, __func__); - return -EINVAL; + ret = -EINVAL; + goto rollback; } /* Check that device supports requested rss hash functions. */ @@ -1231,7 +1247,8 @@ struct rte_eth_dev * "Ethdev port_id=%u invalid rss_hf: 0x%"PRIx64", valid value: 0x%"PRIx64"\n", port_id, dev_conf->rx_adv_conf.rss_conf.rss_hf, dev_info.flow_type_rss_offloads); - return -EINVAL; + ret = -EINVAL; + goto rollback; } /* @@ -1242,7 +1259,8 @@ struct rte_eth_dev * RTE_ETHDEV_LOG(ERR, "Port%u rte_eth_dev_rx_queue_config = %d\n", port_id, diag); - return diag; + ret = diag; + goto rollback; } diag = rte_eth_dev_tx_queue_config(dev, nb_tx_q); @@ -1251,7 +1269,8 @@ struct rte_eth_dev * "Port%u rte_eth_dev_tx_queue_config = %d\n", port_id, diag); rte_eth_dev_rx_queue_config(dev, 0); - return diag; + ret = diag; + goto rollback; } diag = (*dev->dev_ops->dev_configure)(dev); @@ -1260,7 +1279,8 @@ struct rte_eth_dev * port_id, diag); rte_eth_dev_rx_queue_config(dev, 0); rte_eth_dev_tx_queue_config(dev, 0); - return eth_err(port_id, diag); + ret = eth_err(port_id, diag); + goto rollback; } /* Initialize Rx profiling if enabled at compilation time. */ @@ -1270,10 +1290,17 @@ struct rte_eth_dev * port_id, diag); rte_eth_dev_rx_queue_config(dev, 0); rte_eth_dev_tx_queue_config(dev, 0); - return eth_err(port_id, diag); + ret = eth_err(port_id, diag); + goto rollback; } return 0; + +rollback: + memcpy(&dev->data->dev_conf, &orig_conf, sizeof(dev->data->dev_conf)); + +fail: + return ret; } void -- 1.9.3