On Tue, Apr 24, 2012 at 12:01:38PM -0400, Stefan Berger wrote:
On 04/24/2012 11:27 AM, Daniel P. Berrange wrote:
>On Tue, Apr 24, 2012 at 10:20:32AM -0400, Stefan Berger wrote:
>>On 04/23/2012 05:11 PM, Thomas Woerner wrote:
>>>Add support for firewalld
>>>
>>>* bridge_driver, nwfilter_driver: new dbus filters to get
FirewallD1.Reloaded
>>> signal and DBus.NameOwnerChanged on org.fedoraproject.FirewallD1
>>>* iptables, ebtables, nwfilter_ebiptables_driver: use firewall-cmd direct
>>> passthrough interface
>>After some more massaging of the nwfilter code, my suggestion would
>>now be to split this patch up into two parts, one touching the
>>nwfilter driver, the other (1st) part for the rest. I did a lot of
>>changes in the nwfilter driver that I can send you and you may want
>>to merge or I can merge it with your nwfilter-related code changes.
>>
>>It seems to be working when using the firewall-cmd, but
>>unfortunately running the TCK test suite for example is like 8 times
>>slower when using firewalld. Also the VM startup times have
>>significantly increased. :-((
>I wonder if that would be improved by making DBus calls directly
>to firewalld, instead of invoking firewalld-cmd all the time. The
>latter is unquestionably inefficient compared to DBus calls, but
>it'd be interesting to know if that's really what's causing the
>x8 slowdown.
That would a bigger code change to go directly through DBus. I am
currently accumulating CLI commands to execute and then run them in
a batch.
For comparison:
time firewall-cmd --direct --passthrough eb -t nat -L
[...]
real 0m0.102s
user 0m0.075s
sys 0m0.013s
versus
time ebtables -t nat -L
[...]
real 0m0.003s
user 0m0.000s
sys 0m0.002s
Well, I guess it adds up.
Yeah the DBus connection handshake being repeated soo many times, causing
many many context switches for each single rule to be added.
I wonder if firewall-cmd could be extended to allow multiple rules to
be specified at once. It'd just need some kind of character to be
designated as the separator for each rule.
Daniel
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