Re: [RFC PATCH 1/4] rtnetlink: new flag NLM_F_HW_OFFLOAD to indicate kernel object offload to hardware

[Roopa Prabhu <roopa@cumulusnetworks.com>]

On 11/22/14, 12:08 PM, Sergei Shtylyov wrote:
> Hello.
>
> On 11/22/2014 1:49 AM, roopa@cumulusnetworks.com wrote:
>
>> From: Roopa Prabhu <roopa@cumulusnetworks.com>
>
>> This patch adds new flags in netlink header nlmsg_flags to signal if the
>> message is for the kernel, hw or both.
>
>> This can be used to indicate hw offload for all kind of objects
>> routes, fdb entries, neighs, link objects like bonds, bridges, vxlan.
>
>> Adding it in the header makes it possible to use it accross all 
>> objects and
>> across all messages (sets/gets/deletes).
>
>> Other alternative to this is a per kernel object netlink attribute/flag.
>> But that leads to duplicating the attribute in different subsystems.
>
>> Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com>
>> ---
>>   include/uapi/linux/netlink.h |    2 ++
>>   1 file changed, 2 insertions(+)
>
>> diff --git a/include/uapi/linux/netlink.h b/include/uapi/linux/netlink.h
>> index 1a85940..f78522d 100644
>> --- a/include/uapi/linux/netlink.h
>> +++ b/include/uapi/linux/netlink.h
>> @@ -54,6 +54,8 @@ struct nlmsghdr {
>>   #define NLM_F_ACK        4    /* Reply with ack, with zero or error 
>> code */
>>   #define NLM_F_ECHO        8    /* Echo this request         */
>>   #define NLM_F_DUMP_INTR        16    /* Dump was inconsistent due 
>> to sequence change */
>> ++#define NLM_F_KERNEL       32      /* This msg is only for the 
>> kernel */
>
>    I don't think you really meant double '+'.
certainly not.  will fix it. thanks.
>
>> +#define NLM_F_HW_OFFLOAD    64    /* offload this msg to hw */
> [...]
>
> WBR, Sergei
>
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