[PATCH] cfgfile: increase value length

[Varghese, Vipin]

On 2/1/2024 4:02 PM, David Marchand wrote:
> Caution: This message originated from an External Source. Use proper caution when opening attachments, clicking links, or responding.
>
>
> On Wed, Dec 6, 2023 at 12:31 PM Vipin Varghese <vipin.varghese at amd.com> wrote:
>> The default value for CFG_VALUE_LEN is set to 256 characters.
>> This limits the parsing for longer strings in configuration file.
>> Setting the default to 2048 characters increases the value array
>> size in `struct rte_cfgfile_entry`.
>>
>> Files using cfgfile library are
>> 1. drivers/net/mvpp2/
>> 2. app/test-dma-perf/
>> 3. app/test/
>> 4. examples/qos_sched/
>>
>> The structure `rte_cfgfile_entry` is not included in DPDK libraries.
>> Modifying from 256 to 2048 allows `app/test-dma-perf/main.c` helps to
>> parse longer string as shared in https://bugs.dpdk.org/show_bug.cgi?id=1333
>>
>> Signed-off-by: Vipin Varghese <vipin.varghese at amd.com>
>> Suggested-by: Ferruh Yigit <ferruh.yigit at amd.com>
>> ---
>>   lib/cfgfile/rte_cfgfile.h | 2 +-
>>   1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/lib/cfgfile/rte_cfgfile.h b/lib/cfgfile/rte_cfgfile.h
>> index 232c65c77b..401353c44e 100644
>> --- a/lib/cfgfile/rte_cfgfile.h
>> +++ b/lib/cfgfile/rte_cfgfile.h
>> @@ -24,7 +24,7 @@ extern "C" {
>>   #endif
>>
>>   #ifndef CFG_VALUE_LEN
>> -#define CFG_VALUE_LEN 256
>> +#define CFG_VALUE_LEN 2048
>>   #endif
>>
>>   /** Configuration file */
> Last time I looked at this code, I had the impression such a change
> would break the ABI.

Thanks David, Internally & 7 Dec 2023 based on the covnersation email 
from Bruce & Cristian; the new approach DPDK community should be taking 
is not to use comma seperated DMA instance.

Instead make DMA instances like `dma-1:, dma-2:, dma-3 ... etc`.


>
> I see that the discussion stopped at a suggestion to change some parsing logic.
> For now, I marked this patch as Changes requested.

I will make this deffer-ed or close the same.


>
> Thanks.
>
>
> --
> David Marchand
>