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From: Maxime Coquelin <maxime.coquelin@redhat.com>
To: "Xia, Chenbo" <chenbo.xia@intel.com>,
	"dev@dpdk.org" <dev@dpdk.org>,
	"olivier.matz@6wind.com" <olivier.matz@6wind.com>,
	"amorenoz@redhat.com" <amorenoz@redhat.com>,
	"david.marchand@redhat.com" <david.marchand@redhat.com>
Subject: Re: [dpdk-dev] [PATCH v2 44/44] net/virtio: handle Virtio-user setup failure properly
Date: Mon, 25 Jan 2021 17:16:24 +0100
Message-ID: <5a90a987-bf07-7b8a-4320-772e4d8197f7@redhat.com> (raw)
In-Reply-To: <MN2PR11MB406334B149B8E74FB9BAF17C9CA00@MN2PR11MB4063.namprd11.prod.outlook.com>



On 1/22/21 10:24 AM, Xia, Chenbo wrote:
> Hi Maxime,
> 
>> -----Original Message-----
>> From: Maxime Coquelin <maxime.coquelin@redhat.com>
>> Sent: Wednesday, January 20, 2021 5:25 AM
>> To: dev@dpdk.org; Xia, Chenbo <chenbo.xia@intel.com>; olivier.matz@6wind.com;
>> amorenoz@redhat.com; david.marchand@redhat.com
>> Cc: Maxime Coquelin <maxime.coquelin@redhat.com>
>> Subject: [PATCH v2 44/44] net/virtio: handle Virtio-user setup failure
>> properly
>>
>> This patch fixes virtio_user_dev_setup() error path,
>> by cleaning all resources it allocates.
>>
>> Suggested-by: Adrian Moreno <amorenoz@redhat.com>
>> Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>
>> ---
>>  drivers/net/virtio/virtio_user/virtio_user_dev.c | 11 +++++++++--
>>  1 file changed, 9 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/net/virtio/virtio_user/virtio_user_dev.c
>> b/drivers/net/virtio/virtio_user/virtio_user_dev.c
>> index a1e32158bb..2f7dc574b6 100644
>> --- a/drivers/net/virtio/virtio_user/virtio_user_dev.c
>> +++ b/drivers/net/virtio/virtio_user/virtio_user_dev.c
>> @@ -427,15 +427,22 @@ virtio_user_dev_setup(struct virtio_user_dev *dev)
>>
>>  	if (virtio_user_dev_init_notify(dev) < 0) {
>>  		PMD_INIT_LOG(ERR, "(%s) Failed to init notifiers\n", dev->path);
>> -		return -1;
>> +		goto destroy;
>>  	}
>>
>>  	if (virtio_user_fill_intr_handle(dev) < 0) {
>>  		PMD_INIT_LOG(ERR, "(%s) Failed to init interrupt handler\n", dev-
>>> path);
>> -		return -1;
>> +		goto uninit;
>>  	}
>>
>>  	return 0;
>> +
>> +uninit:
>> +	virtio_user_dev_uninit(dev);
> 
> IMHO, it may not be the best choice to call virtio_user_dev_uninit here..
> 
> Logically when virtio_user_fill_intr_handle fails, we want to release the resources
> which is allocated in virtio_user_dev_init_notify (i.e., fds), but virtio_user_dev_uninit
> does more. For example, unregister the event callback that have not been registered yet and
> it also leads to destroy callback called twice. Although things done but not needed will
> not lead to error, but it looks not in the best way. What do you think?

I agree, I'm reworking it for v3.

Kick and call FDs will be initialized to -1 at virtio_user_dev_init()
time. I introduce a virtio_user_dev_uninit_notify that will close all
kick and call FDs is opened and reset their value to -1.

Thenb I call this function in the error path of virtio_user_dev_setup()
and also in virtio_user_dev_uninit().

Doing that, I can also simplifies virtio_user_dev_init_notify() and only
loop for max queue pairs instead of VIRTIO_MAX_VIRTQUEUES and so avoid
setting FDs to -1 a second time.

Thanks,
Maxime

> Thanks,
> Chenbo
> 
>> +destroy:
>> +	dev->ops->destroy(dev);
>> +
>> +	return -1;
>>  }
>>
>>  /* Use below macro to filter features from vhost backend */
>> --
>> 2.29.2
> 


      reply	other threads:[~2021-01-25 16:16 UTC|newest]

Thread overview: 86+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-19 21:24 [dpdk-dev] [PATCH v2 00/44] net/virtio: Virtio PMD rework Maxime Coquelin
2021-01-19 21:24 ` [dpdk-dev] [PATCH v2 01/44] bus/vdev: add helper to get vdev from eth dev Maxime Coquelin
2021-01-20  0:56   ` Thomas Monjalon
2021-01-25 10:53     ` Maxime Coquelin
2021-01-25 11:04       ` Thomas Monjalon
2021-01-21  8:58   ` Xia, Chenbo
2021-01-25 14:51     ` Maxime Coquelin
2021-01-19 21:24 ` [dpdk-dev] [PATCH v2 02/44] bus/vdev: add driver IOVA VA mode requirement Maxime Coquelin
2021-01-20 15:32   ` David Marchand
2021-01-20 17:47     ` Maxime Coquelin
2021-01-19 21:24 ` [dpdk-dev] [PATCH v2 03/44] net/virtio: fix getting old status on reconnect Maxime Coquelin
2021-01-21  7:12   ` Xia, Chenbo
2021-01-19 21:24 ` [dpdk-dev] [PATCH v2 04/44] net/virtio: introduce Virtio bus type Maxime Coquelin
2021-01-19 21:24 ` [dpdk-dev] [PATCH v2 05/44] net/virtio: refactor virtio-user device Maxime Coquelin
2021-01-19 21:24 ` [dpdk-dev] [PATCH v2 06/44] net/virtio: introduce PCI device metadata Maxime Coquelin
2021-01-19 21:24 ` [dpdk-dev] [PATCH v2 07/44] net/virtio: move PCI device init in dedicated file Maxime Coquelin
2021-01-19 21:24 ` [dpdk-dev] [PATCH v2 08/44] net/virtio: move PCI specific dev init to PCI ethdev init Maxime Coquelin
2021-01-19 21:24 ` [dpdk-dev] [PATCH v2 09/44] net/virtio: move MSIX detection to PCI ethdev Maxime Coquelin
2021-01-21  7:12   ` Xia, Chenbo
2021-01-25 12:41     ` Maxime Coquelin
2021-01-19 21:24 ` [dpdk-dev] [PATCH v2 10/44] net/virtio: force IOVA as VA mode for Virtio-user Maxime Coquelin
2021-01-19 21:24 ` [dpdk-dev] [PATCH v2 11/44] net/virtio: store PCI type in Virtio device metadata Maxime Coquelin
2021-01-19 21:24 ` [dpdk-dev] [PATCH v2 12/44] net/virtio: add callback for device closing Maxime Coquelin
2021-01-19 21:24 ` [dpdk-dev] [PATCH v2 13/44] net/virtio: validate features at bus level Maxime Coquelin
2021-01-19 21:24 ` [dpdk-dev] [PATCH v2 14/44] net/virtio: remove bus type enum Maxime Coquelin
2021-01-19 21:24 ` [dpdk-dev] [PATCH v2 15/44] net/virtio: move PCI-specific fields to PCI device Maxime Coquelin
2021-01-19 21:24 ` [dpdk-dev] [PATCH v2 16/44] net/virtio: pack virtio HW struct Maxime Coquelin
2021-01-19 21:24 ` [dpdk-dev] [PATCH v2 17/44] net/virtio: move legacy IO to Virtio PCI Maxime Coquelin
2021-01-19 21:24 ` [dpdk-dev] [PATCH v2 18/44] net/virtio: introduce generic virtio header Maxime Coquelin
2021-01-19 21:24 ` [dpdk-dev] [PATCH v2 19/44] net/virtio: move features definition to generic header Maxime Coquelin
2021-01-21  6:47   ` Xia, Chenbo
2021-01-25 12:35     ` Maxime Coquelin
2021-01-19 21:24 ` [dpdk-dev] [PATCH v2 20/44] net/virtio: move virtqueue defines in " Maxime Coquelin
2021-01-19 21:24 ` [dpdk-dev] [PATCH v2 21/44] net/virtio: move config definitions to " Maxime Coquelin
2021-01-19 21:24 ` [dpdk-dev] [PATCH v2 22/44] net/virtio: make interrupt handling more generic Maxime Coquelin
2021-01-19 21:24 ` [dpdk-dev] [PATCH v2 23/44] net/virtio: move vring alignment to generic header Maxime Coquelin
2021-01-19 21:24 ` [dpdk-dev] [PATCH v2 24/44] net/virtio: remove last PCI refs in non-PCI code Maxime Coquelin
2021-01-19 21:24 ` [dpdk-dev] [PATCH v2 25/44] net/virtio: make Vhost-user req sender consistent Maxime Coquelin
2021-01-21  8:50   ` Xia, Chenbo
2021-01-19 21:24 ` [dpdk-dev] [PATCH v2 26/44] net/virtio: add Virtio-user ops to set owner Maxime Coquelin
2021-01-22  3:27   ` Xia, Chenbo
2021-01-19 21:24 ` [dpdk-dev] [PATCH v2 27/44] net/virtio: add Virtio-user features ops Maxime Coquelin
2021-01-22  7:25   ` Xia, Chenbo
2021-01-25 14:53     ` Maxime Coquelin
2021-01-22  8:46   ` Xia, Chenbo
2021-01-19 21:24 ` [dpdk-dev] [PATCH v2 28/44] net/virtio: add Virtio-user protocol " Maxime Coquelin
2021-01-22  7:27   ` Xia, Chenbo
2021-01-19 21:24 ` [dpdk-dev] [PATCH v2 29/44] net/virtio: add Virtio-user memory tables ops Maxime Coquelin
2021-01-22  7:34   ` Xia, Chenbo
2021-01-25 14:56     ` Maxime Coquelin
2021-01-19 21:24 ` [dpdk-dev] [PATCH v2 30/44] net/virtio: add Virtio-user vring setting ops Maxime Coquelin
2021-01-22  7:49   ` Xia, Chenbo
2021-01-19 21:24 ` [dpdk-dev] [PATCH v2 31/44] net/virtio: add Virtio-user vring file ops Maxime Coquelin
2021-01-22  8:01   ` Xia, Chenbo
2021-01-19 21:24 ` [dpdk-dev] [PATCH v2 32/44] net/virtio: add Virtio-user vring address ops Maxime Coquelin
2021-01-22  8:02   ` Xia, Chenbo
2021-01-19 21:24 ` [dpdk-dev] [PATCH v2 33/44] net/virtio: add Virtio-user status ops Maxime Coquelin
2021-01-22  8:02   ` Xia, Chenbo
2021-01-19 21:24 ` [dpdk-dev] [PATCH v2 34/44] net/virtio: remove useless request ops Maxime Coquelin
2021-01-22  8:10   ` Xia, Chenbo
2021-01-19 21:24 ` [dpdk-dev] [PATCH v2 35/44] net/virtio: improve Virtio-user errors handling Maxime Coquelin
2021-01-22  8:10   ` Xia, Chenbo
2021-01-19 21:24 ` [dpdk-dev] [PATCH v2 36/44] net/virtio: move Vhost-user reqs to Vhost-user backend Maxime Coquelin
2021-01-21  8:56   ` Xia, Chenbo
2021-01-25 14:50     ` Maxime Coquelin
2021-01-19 21:25 ` [dpdk-dev] [PATCH v2 37/44] net/virtio: make server mode blocking Maxime Coquelin
2021-01-22  8:19   ` Xia, Chenbo
2021-01-19 21:25 ` [dpdk-dev] [PATCH v2 38/44] net/virtio: move protocol features to Vhost-user Maxime Coquelin
2021-01-22  8:20   ` Xia, Chenbo
2021-01-19 21:25 ` [dpdk-dev] [PATCH v2 39/44] net/virtio: introduce backend data Maxime Coquelin
2021-01-22  8:26   ` Xia, Chenbo
2021-01-19 21:25 ` [dpdk-dev] [PATCH v2 40/44] net/virtio: move Vhost-user specifics to its backend Maxime Coquelin
2021-01-22  8:49   ` Xia, Chenbo
2021-01-19 21:25 ` [dpdk-dev] [PATCH v2 41/44] net/virtio: move Vhost-kernel data " Maxime Coquelin
2021-01-22  8:55   ` Xia, Chenbo
2021-01-25 14:59     ` Maxime Coquelin
2021-01-19 21:25 ` [dpdk-dev] [PATCH v2 42/44] net/virtio: move Vhost-vDPA " Maxime Coquelin
2021-01-22  9:06   ` Xia, Chenbo
2021-01-25 15:02     ` Maxime Coquelin
2021-01-19 21:25 ` [dpdk-dev] [PATCH v2 43/44] net/virtio: improve Vhost-user error logging Maxime Coquelin
2021-01-22  9:11   ` Xia, Chenbo
2021-01-25 15:04     ` Maxime Coquelin
2021-01-26  6:10       ` Xia, Chenbo
2021-01-19 21:25 ` [dpdk-dev] [PATCH v2 44/44] net/virtio: handle Virtio-user setup failure properly Maxime Coquelin
2021-01-22  9:24   ` Xia, Chenbo
2021-01-25 16:16     ` Maxime Coquelin [this message]

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