netdev - Re: [PATCH net-next iproute2] ip: increase number of MPLS labels

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Message-ID: <ddb54ca8-d7df-3446-3929-5f0116286c80@cumulusnetworks.com>
Date:   Sun, 30 Apr 2017 17:42:15 -0600
From:   David Ahern <dsa@...ulusnetworks.com>
To:     Stephen Hemminger <stephen@...workplumber.org>
Cc:     netdev@...r.kernel.org,
        "Eric W. Biederman" <ebiederm@...ssion.com>,
        roopa <roopa@...ulusnetworks.com>
Subject: Re: [PATCH net-next iproute2] ip: increase number of MPLS labels

On 4/30/17 12:04 AM, Stephen Hemminger wrote:
> On Sat, 29 Apr 2017 20:48:50 -0700
> David Ahern <dsa@...ulusnetworks.com> wrote:
> 
>> Kernel now supports more than 2 labels. Increase ip to
>> handle up to 16 labels.
>>
>> Signed-off-by: David Ahern <dsa@...ulusnetworks.com>
>> ---
>>  include/utils.h | 8 ++++----
>>  lib/utils.c     | 2 +-
>>  2 files changed, 5 insertions(+), 5 deletions(-)
>>
>> diff --git a/include/utils.h b/include/utils.h
>> index 8c12e1e2a60c..a69e176c260d 100644
>> --- a/include/utils.h
>> +++ b/include/utils.h
>> @@ -54,6 +54,9 @@ void incomplete_command(void) __attribute__((noreturn));
>>  #define NEXT_ARG_FWD() do { argv++; argc--; } while(0)
>>  #define PREV_ARG() do { argv--; argc++; } while(0)
>>  
>> +/* Maximum number of labels the mpls helpers support */
>> +#define MPLS_MAX_LABELS 16
>> +
> 
> Why is the kernel limit not in include/uapi/ header file?
> 

I believe Eric had reasons, but not sure why.