reference counting matches / ipt_pool
Wed, 19 Apr 2000 20:02:09 +0930
In message <email@example.com> you write:
> match will be used in the filter table. I can increment a reference count
> on R in the check() function. The question is: where is the "uncheck"
> hook where I can decrement the reference once the match is deleted
> from the table?
<SIGH>. Hi Patrick!
This is the second person who said they wanted this
`destructor' capability back. And here's me thinking I'm clever for
getting rid of it because *I* didn't need it.
Try the below patch. A few things you might have to be aware of
(depending on your implementation):
1) On SMP, after checking we make a copy of the rules for every other CPU
(see how ipt_limit handles this).
2) Every user operation does a complete replacement of the table, so
don't be surprised.
3) If an invalid rule is inserted, then all the rules which have been
`check()'ed up to that rule will have `destroy()' called on them.