Re: [dpdk-stable] [PATCH v2] app/testpmd: report invalid command line parameter

[Pallavi Kadam <pallavi.kadam@intel.com>]

On 11/18/2019 8:18 AM, Ferruh Yigit wrote:
> On 11/18/2019 3:37 PM, David Marchand wrote:
>> We currently do not check that a non option string has been passed to
>> testpmd.
>>
>> Example:
>> $ ./master/app/testpmd --no-huge -m 512 --vdev net_null0 \
>> 	--vdev net_null1 -- -i nb-cores=2 --total-num-mbuf 2048
>> [...]
>> testpmd> show config fwd
>> io packet forwarding - ports=2 - cores=1 - streams=2 - NUMA support
>> enabled, MP allocation mode: native
>> Logical Core 1 (socket 0) forwards packets on 2 streams:
>>    RX P=0/Q=0 (socket 0) -> TX P=1/Q=0 (socket 0) peer=02:00:00:00:00:01
>>    RX P=1/Q=0 (socket 0) -> TX P=0/Q=0 (socket 0) peer=02:00:00:00:00:00
>>
>> Here nb-cores=2 is just ignored, while the (probably sleepy) user did not
>> notice this.
>>
>> Validate that all strings passed to testpmd are part of a known option.
>>
>> After this patch:
>> $ ./master/app/testpmd --no-huge -m 512 --vdev net_null0 \
>> 	--vdev net_null1 -- -i nb-cores=2 --total-num-mbuf 2048
>> [...]
>> Invalid parameter: nb-cores=2
>> EAL: Error - exiting with code: 1
>>    Cause: Command line incorrect
>>
>> While at it, when passing an unknown option, print the string that gets
>> refused by getopt_long to help the user.
>>
>> Fixes: af75078fece3 ("first public release")
>> Cc: stable@dpdk.org
>>
>> Signed-off-by: David Marchand <david.marchand@redhat.com>
>> Reviewed-by: Ferruh Yigit <ferruh.yigit@intel.com>
>> ---
>> This seems a bit dangerous to take this kind of change this late.
>> Some "working fine" scripts might now report failures from testpmd because
>> of garbage in the command line.
>>
>> Sending the patch anyway to see what others think about it.
>>
>> Changelog since v1:
>> - fixed example in commitlog,
>>
>> ---
>>   app/test-pmd/parameters.c | 7 +++++++
>>   1 file changed, 7 insertions(+)
>>
>> diff --git a/app/test-pmd/parameters.c b/app/test-pmd/parameters.c
>> index deca7a6828..2e7a504415 100644
>> --- a/app/test-pmd/parameters.c
>> +++ b/app/test-pmd/parameters.c
>> @@ -1363,12 +1363,19 @@ launch_args_parse(int argc, char** argv)
>>   			break;
>>   		default:
>>   			usage(argv[0]);
>> +			printf("Invalid option: %s\n", argv[optind]);
>>   			rte_exit(EXIT_FAILURE,
>>   				 "Command line is incomplete or incorrect\n");
>>   			break;
>>   		}
>>   	}
>>   
>> +	if (optind != argc) {
> I hope 'optind' works as expected [1] in Windows too (Anatoly verified the
> FreeBSD one).
>
> @Pallavi, @Ranjit, Can you please confirm it?
>
> [1]
> https://linux.die.net/man/3/optind
> "
> If there are no more option characters, getopt() returns -1. Then optind is the
> index in argv of the first argv-element that is not an option.
> "

Verified on Windows. So far this change does not affect Windows code.
Also, Windows does not support testpmd app yet.