netdev - Re: [PATCH net-next] geneve: fix ttl inherit type

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Date:   Fri, 28 Sep 2018 11:59:37 -0600
From:   David Ahern <dsahern@...il.com>
To:     Hangbin Liu <liuhangbin@...il.com>, netdev@...r.kernel.org
Cc:     David Miller <davem@...emloft.net>,
        Stephen Hemminger <stephen@...workplumber.org>,
        Phil Sutter <phil@....cc>
Subject: Re: [PATCH net-next] geneve: fix ttl inherit type

On 9/27/18 7:09 PM, Hangbin Liu wrote:
> Phil pointed out that there is a mismatch between vxlan and geneve ttl
> inherit. We should define it as a flag and use nla_put_flag to export this
> opiton.
> 
> Fixes: 52d0d404d39dd ("geneve: add ttl inherit support")

same here .. getting an unknown commit id.


> Reported-by: Phil Sutter <phil@....cc>
> Signed-off-by: Hangbin Liu <liuhangbin@...il.com>
> ---
>  drivers/net/geneve.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/net/geneve.c b/drivers/net/geneve.c
> index 6625fab..09ab2fd 100644
> --- a/drivers/net/geneve.c
> +++ b/drivers/net/geneve.c
> @@ -1100,7 +1100,7 @@ static const struct nla_policy geneve_policy[IFLA_GENEVE_MAX + 1] = {
>  	[IFLA_GENEVE_UDP_CSUM]		= { .type = NLA_U8 },
>  	[IFLA_GENEVE_UDP_ZERO_CSUM6_TX]	= { .type = NLA_U8 },
>  	[IFLA_GENEVE_UDP_ZERO_CSUM6_RX]	= { .type = NLA_U8 },
> -	[IFLA_GENEVE_TTL_INHERIT]	= { .type = NLA_U8 },
> +	[IFLA_GENEVE_TTL_INHERIT]	= { .type = NLA_FLAG },
>  };
>  
>  static int geneve_validate(struct nlattr *tb[], struct nlattr *data[],
> @@ -1582,7 +1582,7 @@ static size_t geneve_get_size(const struct net_device *dev)
>  		nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_UDP_CSUM */
>  		nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_UDP_ZERO_CSUM6_TX */
>  		nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_UDP_ZERO_CSUM6_RX */
> -		nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_TTL_INHERIT */
> +		nla_total_size(0) + 	/* IFLA_GENEVE_TTL_INHERIT */
>  		0;
>  }
>  
> @@ -1636,7 +1636,7 @@ static int geneve_fill_info(struct sk_buff *skb, const struct net_device *dev)
>  		goto nla_put_failure;
>  #endif
>  
> -	if (nla_put_u8(skb, IFLA_GENEVE_TTL_INHERIT, ttl_inherit))
> +	if (ttl_inherit && nla_put_flag(skb, IFLA_GENEVE_TTL_INHERIT))
>  		goto nla_put_failure;
>  
>  	return 0;
>