Re: [PATCH v2 1/2] conntrack: Flush connections with a given mark

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Hi Pablo,

On Wed, Jan 7, 2015 at 7:56 PM, Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx> wrote:
> 1) strict type checking in the dump case (for the ctnetlink_filter
> object), instead of relying on the genering void * to keep the
> ct_iterate happy. It adds a bit more code but I prefer it like this.
>
> 2) Explicitly reject mark filters when marks are not supported. This
> changes the previous behaviour, but I think this is good to have so
> userspace knows that what it is requesting is not support (instead of
> silently ignoring it).
>
> 3) add helper function to allocate the filter object, so this always
> needs explicit release.
>
> Please, have a look a it and let me know if you're fine with it. I'll
> pass it to net-next (upcoming 3.20).

Thank you for making the improvements, the patch looks a lot better
now! I only have on question/comment. What is the reason behind adding
the ctnl_flush_filter()? Isn't it enough to have ctnetlink_filter()
return 1 in case of match and 0 otherwise. At least, the way I think,
it makes more sense when I read the code that if this function returns
false, we should ignore conntrack entry due to no match. So the check
in ctnetlink_dump_table() should read !ctnetlink_filter(). In
addition, there is a small typo in the commit log. In the last
paragraph it says ctnetlink_apply_filter(). After your changes, it is
just called ctnetlink_filter().

Thanks again for your help.

-Kristian
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