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

From: Stephen Hemminger <[email-masked]>
Date: Sat, 29 Apr 2017 23:04:30 -0700

On Sat, 29 Apr 2017 20:48:50 -0700
David Ahern <[email-masked]> wrote:

> Kernel now supports more than 2 labels. Increase ip to
> handle up to 16 labels.
> 
> Signed-off-by: David Ahern <[email-masked]>
> ---
>  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?