On 10/18/18 1:01 AM, Hangbin Liu wrote:
> Currently when we add geneve with "ttl inherit", we only set ttl to 0, which
> is actually use whatever default value instead of inherit the inner protocol's
> ttl value.
> 
> To make a difference with ttl inherit and ttl == 0, we add an attribute
> IFLA_GENEVE_TTL_INHERIT in kernel commit 52d0d404d39dd ("geneve: add ttl
> inherit support"). Now let's use "ttl inherit" to inherit the inner
> protocol's ttl, and use "ttl auto" to means "use whatever default value",
> the same behavior with ttl == 0.
> 
> v2:
> 1) remove IFLA_GENEVE_TTL_INHERIT defination in if_link.h as it's already
>    updated.
> 2) Still use addattr8() so we can enable/disable ttl inherit, as Michal
>    suggested.
> 
> Reported-by: Jianlin Shi <ji...@redhat.com>
> Signed-off-by: Hangbin Liu <liuhang...@gmail.com>
> ---
>  ip/iplink_geneve.c | 20 +++++++++++++-------
>  1 file changed, 13 insertions(+), 7 deletions(-)
> 

please update the man page as well.

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