dummynet and vnet kernel panic

[Julian Elischer]

On 4/9/10 11:14 AM, Luigi Rizzo wrote:
> On Wed, Apr 07, 2010 at 09:58:38PM +0200, Anders Hagman wrote:
>> Hi
>>
>> When using dummynet inside a vnet node with a simple pipe the kernel
>> panic on the first packet.
>>
>> I use 8.0-STABLE cvsuped at 7 Apr 15:28
>> The ipfw code with dummynet is largely changed and the patch in the url
>> below will not work.
>> http://www.freebsd.org/cgi/query-pr.cgi?pr=143621
>>
>> Is there a fix in the near future?
>
> URL: http://svn.freebsd.org/changeset/base/206428
>
> Log:
>    This commit enables partial operation of dummynet with kernels
>    compiled with "options VIMAGE".
>    As it is now, there is still a single instance of the pipes,
>    and it is only usable from vnet0 (the main instance).
>    Trying to use a pipe from a different vimage does not crash
>    the system as it did before, but the traffic coming out from
>    the pipe goes to the wrong place, and i still need to
>    figure out where.
>
>    Support for per-vimage pipes is almost there (just a matter of
>    uncommenting the VNET_* definitions for dn_cfg, plus putting into
>    the structure the remaining static variables), however i need
>    first to figure out how init/uninit work, and also to understand
>    where packets are ending up on exit from a pipe.

please read:
http://p4db.freebsd.org/fileLogView.cgi?FSPC=//depot/projects/vimage/porting_to_vimage.txt

and let me know if you have questions so I can fix the doc.




>    In summary: vimage support for dummynet is not complete yet,
>    but we are getting there.
>
> Modified:
>    head/sys/netinet/ipfw/ip_dn_io.c
>    head/sys/netinet/ipfw/ip_dn_private.h
>    head/sys/netinet/ipfw/ip_dummynet.c
>
>
>> BR
>> /Anders H
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