UDP Lite support

[Kevin Lo]

Joe Nosay wrote:
> 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?

Start new, thanks.

     Kevin