Re: [LARTC] Two u32 problems: module count and fw

Linux Advanced Routing and Traffic Control

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On Mon, Dec 24, 2001 at 05:53:16PM +0530, Sumit Pandya wrote:
> Hi All,
> 	I found 2 unusual behavior with u32 classifier in Kernel 2.4.12. I?ve u32
> compiled as module.
> 1> u32 filter seems not working if there is already some fw filter used for
> some other class. In order to get u32 working I?ve to delete root class,
> which in terms delete all fw filters too, and then same command for u32
> works. fw is also compiled as module.

Can you write an 'exploit script' that shows this behaviour? This will help
attracting the attention of the relevant people.

> 2> If I add u32 filter to my classid then it increase module-count, which I
> can see in "lsmod". I know this is normal behavior. But if I attach more u32
> filter in same classid it doesn?t increase module-count more. Is this normal
> behaviour?

Yes. Usage count is the amount of other modules depending on u32.

> 	If I do same process on second device (eth1) then first time it increase
> module count by one so now total used count shown is 2. Subsequent u32 usage
> does not increase this use count.

Does it cause problems?

If you have the exploit script ready, we can do more.

Regards,

bert

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