From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga05.intel.com (mga05.intel.com [192.55.52.43]) by dpdk.org (Postfix) with ESMTP id EB9756CD2; Thu, 19 Apr 2018 13:07:41 +0200 (CEST) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga004.jf.intel.com ([10.7.209.38]) by fmsmga105.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 19 Apr 2018 04:07:40 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.48,468,1517904000"; d="scan'208";a="192727413" Received: from fyigit-mobl.ger.corp.intel.com (HELO [10.237.221.42]) ([10.237.221.42]) by orsmga004.jf.intel.com with ESMTP; 19 Apr 2018 04:07:38 -0700 From: Ferruh Yigit To: Matan Azrad , Thomas Monjalon , Gaetan Rivet , Jingjing Wu Cc: "dev@dpdk.org" , Neil Horman , Bruce Richardson , Konstantin Ananyev , "stable@dpdk.org" , Olga Shern References: <1515318351-4756-1-git-send-email-matan@mellanox.com> <1516293317-30748-1-git-send-email-matan@mellanox.com> <1516293317-30748-2-git-send-email-matan@mellanox.com> <1aac7e4c-6f2a-7f3d-5f7c-e07e48baac6a@intel.com> <81bbd03d-3a69-979d-dcb0-553b91952198@intel.com> Openpgp: preference=signencrypt Autocrypt: addr=ferruh.yigit@intel.com; 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WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.7.0 MIME-Version: 1.0 In-Reply-To: <81bbd03d-3a69-979d-dcb0-553b91952198@intel.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Subject: Re: [dpdk-dev] [dpdk-stable] [PATCH v3 1/7] ethdev: fix port data reset timing 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, 19 Apr 2018 11:07:42 -0000 On 3/30/2018 11:39 AM, Ferruh Yigit wrote: > On 3/28/2018 1:07 PM, Matan Azrad wrote: >> Hi Ferruh >> >>> From: Ferruh Yigit, Wednesday, March 28, 2018 1:38 AM >>> On 3/5/2018 3:12 PM, Matan Azrad wrote: >>>> Hi Ferruh >>>> >>>> From: Ferruh Yigit, Sent: Monday, March 5, 2018 5:07 PM >>>>> On 3/5/2018 2:52 PM, Matan Azrad wrote: >>>>>> HI >>>>>> >>>>>> From: Ferruh Yigit, Sent: Monday, March 5, 2018 1:24 PM >>>>>>> On 1/18/2018 4:35 PM, Matan Azrad wrote: >>>>>>>> rte_eth_dev_data structure is allocated per ethdev port and can be >>>>>>>> used to get a data of the port internally. >>>>>>>> >>>>>>>> rte_eth_dev_attach_secondary tries to find the port identifier >>>>>>>> using rte_eth_dev_data name field comparison and may get an >>>>>>>> identifier of invalid port in case of this port was released by >>>>>>>> the primary process because the port release API doesn't reset the >>> port data. >>>>>>>> >>>>>>>> So, it will be better to reset the port data in release time >>>>>>>> instead of allocation time. >>>>>>>> >>>>>>>> Move the port data reset to the port release API. >>>>>>>> >>>>>>>> Fixes: d948f596fee2 ("ethdev: fix port data mismatched in multiple >>>>>>>> process model") >>>>>>>> Cc: stable@dpdk.org >>>>>>>> >>>>>>>> Signed-off-by: Matan Azrad >>>>>>>> --- >>>>>>>> lib/librte_ether/rte_ethdev.c | 2 +- >>>>>>>> 1 file changed, 1 insertion(+), 1 deletion(-) >>>>>>>> >>>>>>>> diff --git a/lib/librte_ether/rte_ethdev.c >>>>>>>> b/lib/librte_ether/rte_ethdev.c index 7044159..156231c 100644 >>>>>>>> --- a/lib/librte_ether/rte_ethdev.c >>>>>>>> +++ b/lib/librte_ether/rte_ethdev.c >>>>>>>> @@ -204,7 +204,6 @@ struct rte_eth_dev * >>>>>>>> return NULL; >>>>>>>> } >>>>>>>> >>>>>>>> - memset(&rte_eth_dev_data[port_id], 0, sizeof(struct >>>>>>> rte_eth_dev_data)); >>>>>>>> eth_dev = eth_dev_get(port_id); >>>>>>>> snprintf(eth_dev->data->name, sizeof(eth_dev->data->name), >>>>>>> "%s", name); >>>>>>>> eth_dev->data->port_id = port_id; @@ -252,6 +251,7 @@ struct >>>>>>>> rte_eth_dev * >>>>>>>> if (eth_dev == NULL) >>>>>>>> return -EINVAL; >>>>>>>> >>>>>>>> + memset(eth_dev->data, 0, sizeof(struct >>> rte_eth_dev_data)); >>>>>>> >>>>>>> Hi Matan, >>>>>>> >>>>>>> What most of the vdev release path does is: >>>>>>> >>>>>>> eth_dev = rte_eth_dev_allocated(...) >>>>>>> rte_free(eth_dev->data->dev_private); >>>>>>> rte_free(eth_dev->data); >>>>>>> rte_eth_dev_release_port(eth_dev); >>>>>>> >>>>>>> Since eth_dev->data freed, memset() it in >>>>>>> rte_eth_dev_release_port() will be problem. >>>>>>> >>>>>>> We don't run remove path that is why we didn't hit the issue but >>>>>>> this seems problem for all virtual PMDs. >>>>>> >>>>>> Yes, it is a problem and should be fixed: >>>>>> For vdevs which use private rte_eth_dev_data the remove order can >>> be: >>>>>> private_data = eth_dev->data; >>>>>> rte_free(eth_dev->data->dev_private); >>>>>> rte_eth_dev_release_port(eth_dev); /* The last operation working >>>>> on ethdev structure. */ >>>>>> rte_free(private_data); >>>>> >>>>> Do we need to save "private_data"? >>>> >>>> Just to emphasis that eth_dev structure should not more be available after >>> rte_eth_dev_release_port(). >>>> Maybe in the future rte_eth_dev_release_port() will zero eth_dev >>>> structure too :) >>> >>> Hi Matan, >>> >>> Reminder of this issue, it would be nice to fix in this release. >>> >> >> Regarding the private rte_eth_dev_data, it should be fixed in the next thread: >> https://dpdk.org/dev/patchwork/patch/35632/ >> >> Regarding the rte_eth_dev_pci_release() function: I'm going to send a fix. > > Thanks Matan for the patch, > > But rte_eth_dev_release_port() is still broken because of this change, please > check _rte_eth_dev_callback_process() which uses dev->data->port_id. Hi Matan, Any update on this? As mentioned above rte_eth_dev_release_port() is still broken. Thanks, ferruh > >> >>>> >>>>>> >>>>>> >>>>>>> Also rte_eth_dev_pci_release() looks problematic now. >>>>>> >>>>>> Yes, again, the last operation working on ethdev structure should be >>>>> rte_eth_dev_release_port(). >>>>>> >>>>>> So need to fix all vdevs and the rte_eth_dev_pci_release() function. >>>>>> >>>>>> Any comments? >>>>>> >>>> >> >