netdev - Re: [PATCH iproute2 net-next] vxlan: fix ttl inherit behavior

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Message-ID: <c34e4c8b-f115-e77c-7228-82bab11fb54b@gmail.com>
Date:   Thu, 19 Apr 2018 12:15:33 -0600
From:   David Ahern <dsahern@...il.com>
To:     Hangbin Liu <liuhangbin@...il.com>, netdev@...r.kernel.org
Cc:     Stephen Hemminger <stephen@...workplumber.org>,
        Jiri Benc <jbenc@...hat.com>
Subject: Re: [PATCH iproute2 net-next] vxlan: fix ttl inherit behavior

On 4/17/18 11:05 PM, Hangbin Liu wrote:
> Like kernel net-next commit 72f6d71e491e6 ("vxlan: add ttl inherit support"),
> vxlan ttl inherit should means inherit the inner protocol's ttl value.
> 
> But currently when we add vxlan with "ttl inherit", we only set ttl 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_VXLAN_TTL_INHERIT when "ttl inherit" specified. And use "ttl auto"
> to means "use whatever default value", the same behavior with ttl == 0.
> 
> Reported-by: Jianlin Shi <jishi@...hat.com>
> Suggested-by: Jiri Benc <jbenc@...hat.com>
> Signed-off-by: Hangbin Liu <liuhangbin@...il.com>
> ---
>  include/uapi/linux/if_link.h | 1 +
>  ip/iplink_vxlan.c            | 8 ++++++--
>  2 files changed, 7 insertions(+), 2 deletions(-)
> 

applied to iproute2-next.