UDP Lite support

[Joe Nosay]

On Mon, Mar 31, 2014 at 10:20 PM, Kevin Lo <kevlo at freebsd.org> wrote:

> On 2014/03/28 00:21, John Baldwin wrote:
>
>> On Thursday, March 27, 2014 5:32:16 am Kevin Lo wrote:
>>
>>> Are you interested in working on these and report back?
>>>>>>
>>>>> The revised patch is available at:
>>>>> http://people.freebsd.org/~kevlo/udplite.diff
>>>>>
>>>> Thank you for your suggestions.
>>>
>>>  A few suggestions:
>>>>
>>>> - I would just drop the INP lock and return EOPNOTSUPP directly rather
>>>>     than using goto's to 'bad_setoptname' and 'bad_getoptname' so the
>>>>     UDP-lite options are self-contained.
>>>>
>>> Fixed.
>>>
>> Thanks.
>>
>>  - I'm not a super big fan of all the udp_common_* macros only because
>>>>     I think it obfuscates things.  At the very least, please move these
>>>>     things out of the header and into udp_usrreq.c so they are closer
>>>>     to the implementation.  I would even suggest making them inline
>>>>     functions instead of macros.
>>>>
>>> Okay, I removed two udp_common_* macros.  I also renamed
>>> udp_common_init()
>>> to udp_udplite_init() and moved it into udp_usrreq.c.  Using a macro here
>>> to follow the style used in SCTP (sctp_os_bsd.h).
>>>
>>> Here's a third version of the udp-lite patch:
>>> http://people.freebsd.org/~kevlo/udplite.diff
>>>
>> Ok, I would say that udp_common_init() is actually a better name if you
>> keep
>> the macro (which I think is fine) rather than udp_udplite_init() as the
>> macro
>> is not specific to UDP Lite.  However, thanks for moving the macros out
>> of the
>> header.
>>
>
> Thank you John.  glebius@ suggests we don't need to have two absolutely
> equal uma zones since most systems don't run UDP-Lite.
> If practice shows that a differentiation at zone level between UDP and
> UDP-Lite PCBs is important, then it could be done later.
>
> Following up with a fourth version of the udp-lite patch.
> http://people.freebsd.org/~kevlo/udplite.diff
>
> On top of the previous versions, this:
>         - removes a uma zone for udp-lite
>         - udp_common_ctlinput() belongs under #ifdef INET
>         - removes sysctl nodes for udp-lite.
>         - bumps version and adds my copyright.
>
>     Kevin
>
>
>
Do I patch over the current src- which was already patched with version 3-
or do I just start new?