netdev - Re: [PATCH net-next 4/4] netns: enable to dump full nsid translation table

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Message-ID: <25aeca82-bd0e-5fc6-9fc9-a022d255e4fd@gmail.com>
Date:   Wed, 21 Nov 2018 14:08:46 -0700
From:   David Ahern <dsahern@...il.com>
To:     nicolas.dichtel@...nd.com, davem@...emloft.net
Cc:     netdev@...r.kernel.org
Subject: Re: [PATCH net-next 4/4] netns: enable to dump full nsid translation
 table

On 11/21/18 2:01 PM, Nicolas Dichtel wrote:
> Le 21/11/2018 à 19:09, David Ahern a écrit :
>> On 11/21/18 4:01 AM, Nicolas Dichtel wrote:
>>> diff --git a/net/core/net_namespace.c b/net/core/net_namespace.c
>>> index 92730905886c..fc568cd0b560 100644
>>> --- a/net/core/net_namespace.c
>>> +++ b/net/core/net_namespace.c
>>> @@ -740,7 +740,7 @@ static int rtnl_net_get_size(void)
>>>  }
>>>  
>>>  static int rtnl_net_fill(struct sk_buff *skb, u32 portid, u32 seq, int flags,
>>> -			 int cmd, int nsid)
>>> +			 int cmd, int nsid, bool add_ref, int ref_nsid)
>>>  {
>>>  	struct nlmsghdr *nlh;
>>>  	struct rtgenmsg *rth;
>>> @@ -755,6 +755,9 @@ static int rtnl_net_fill(struct sk_buff *skb, u32 portid, u32 seq, int flags,
>>>  	if (nla_put_s32(skb, NETNSA_NSID, nsid))
>>>  		goto nla_put_failure;
>>>  
>>> +	if (add_ref && nla_put_s32(skb, NETNSA_CURRENT_NSID, ref_nsid))
>>> +		goto nla_put_failure;
>>
>> Why not use ref_nsid >= 0 and drop the add_ref argument?
> Because ref_nsid can be -1 (NETNSA_NSID_NOT_ASSIGNED) and I didn't want to add
> another magic, I think it's clearer with an explicit bool.
> 

it pushes the input args to 8.