[dpdk-dev] vhost: unlink existing file for server mode

[Ilya Maximets]

On 02.02.2018 18:38, Richardson, Bruce wrote:
> 
> 
>> -----Original Message-----
>> From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of Ilya Maximets
>> Sent: Friday, February 2, 2018 3:30 PM
>> To: Yang, Zhiyong <zhiyong.yang at intel.com>; dev at dpdk.org
>> Cc: yliu at fridaylinux.org; maxime.coquelin at redhat.com
>> Subject: Re: [dpdk-dev] vhost: unlink existing file for server mode
>>
>> Oh.
>>
>> It's such a game: twice a year someone sends this patch to mail list.
>>
>> I have another one for you:
>> * Find all the patches equal to this one in archives.
>> * Read all the discussions.
>> * Come back if you have some new ideas, not already discussed many times
>> here.
>>
>> Sorry for my sarcasm.
>> NACK for this, as usual.
>>
>> Best regards, Ilya Maximets.
> 
> Surely the fact of repeated patches is an indication that this should be
> explicitly called out at appropriately places in the code via comments.
> Far easier to provide people the info in the code they are changing than
> expecting them to trawl through historical mailing list entries.
> 
> Regards,
> /Bruce
> 

Yes, you're right. We just discussed the situation locally in the office
and came to the exactly same conclusion. We definitely need the comment
here to prevent future unlink related patches.

>>
>> On 02.02.2018 11:39, Zhiyong Yang wrote:
>>> Vhost-user startup will fail based on server mode, if the specified
>>> socket file has already existed. The patch introduces function
>>> unlink() to remove the possible existing file.
>>>
>>> Cc: yliu at fridaylinux.org
>>> Cc: maxime.coquelin at redhat.com
>>>
>>> Signed-off-by: Zhiyong Yang <zhiyong.yang at intel.com>
>>> ---
>>>  lib/librte_vhost/socket.c | 1 +
>>>  1 file changed, 1 insertion(+)
>>>
>>> diff --git a/lib/librte_vhost/socket.c b/lib/librte_vhost/socket.c
>>> index 6e3857e7a..324a24f4e 100644
>>> --- a/lib/librte_vhost/socket.c
>>> +++ b/lib/librte_vhost/socket.c
>>> @@ -315,6 +315,7 @@ vhost_user_start_server(struct vhost_user_socket
>> *vsocket)
>>>  	int fd = vsocket->socket_fd;
>>>  	const char *path = vsocket->path;
>>>
>>> +	unlink(path);
>>>  	ret = bind(fd, (struct sockaddr *)&vsocket->un, sizeof(vsocket-
>>> un));
>>>  	if (ret < 0) {
>>>  		RTE_LOG(ERR, VHOST_CONFIG,
>>>