netdev - Re: [PATCH net iproute2 v2 1/2] mpls: always set type as RTN

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Date:	Wed, 27 May 2015 13:08:25 -0700
From:	roopa <roopa@...ulusnetworks.com>
To:	Robert Shearman <rshearma@...cade.com>
CC:	ebiederm@...ssion.com, davem@...emloft.net, netdev@...r.kernel.org,
	vivek@...ulusnetworks.com
Subject: Re: [PATCH net iproute2 v2 1/2] mpls: always set type as RTN_UNICAST
 for route add/deletes

On 5/27/15, 12:59 PM, Robert Shearman wrote:
> On 27/05/15 19:37, Roopa Prabhu wrote:
>> From: Roopa Prabhu <roopa@...ulusnetworks.com>
>>
>> Kernel expects type RTN_UNICAST for mpls route/dels
>>
>> Signed-off-by: Vivek Venkataraman <vivek@...ulusnetworks.com>
>> Signed-off-by: Roopa Prabhu <roopa@...ulusnetworks.com>
>> ---
>>   ip/iproute.c |    5 +++++
>>   1 file changed, 5 insertions(+)
>>
>> diff --git a/ip/iproute.c b/ip/iproute.c
>> index 670a4c6..71c088b 100644
>> --- a/ip/iproute.c
>> +++ b/ip/iproute.c
>> @@ -803,6 +803,7 @@ static int iproute_modify(int cmd, unsigned 
>> flags, int argc, char **argv)
>>       int scope_ok = 0;
>>       int table_ok = 0;
>>       int raw = 0;
>> +    int type_ok = 0;
>>
>>       memset(&req, 0, sizeof(req));
>>
>> @@ -1095,6 +1096,7 @@ static int iproute_modify(int cmd, unsigned 
>> flags, int argc, char **argv)
>>                   rtnl_rtntype_a2n(&type, *argv) == 0) {
>>                   NEXT_ARG();
>>                   req.r.rtm_type = type;
>> +                type_ok = 1;
>>               }
>>
>>               if (matches(*argv, "help") == 0)
>> @@ -1160,6 +1162,9 @@ static int iproute_modify(int cmd, unsigned 
>> flags, int argc, char **argv)
>>           }
>>       }
>>
>> +    if (!type_ok && req.r.rtm_family == AF_MPLS)
>> +        req.r.rtm_type = RTN_UNICAST;
>> +
>>       if (req.r.rtm_family == AF_UNSPEC)
>>           req.r.rtm_family = AF_INET;
>>
>>
>
> There is this block of code near the start of iproute_modify that sets 
> req.r.rtm_type in the add/modify cases:
>
>         if (cmd != RTM_DELROUTE) {
>                 req.r.rtm_protocol = RTPROT_BOOT;
>                 req.r.rtm_scope = RT_SCOPE_UNIVERSE;
>                 req.r.rtm_type = RTN_UNICAST;
>         }
>
> How about doing similar for the mpls delete case? This would avoid the 
> need to track if the type has been set and would also make the way 
> rtm_type is set in the delete case as close as possible to that in the 
> add/modify cases.
sure that works too. There was already *_ok checks for the rest of the 
attributes, ..so added it there.

v3 ...coming...



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