Howdy!
The Smoothwall Express traffic stats collector (traffiClogger)
doesn't handle counter rollovers and doesn't perform read&flush. (Yes,
the code is somewhat aged.) To change it to perform read&flush is
non-trivial. Then it occurred to me that it might be easier to change
ipt_ACCOUNT in xtables-addons (v1.45) to use 64-bit counters,
considering it was designed around single kernel pages.
I haven't seen anyone addressing 64-bit counters in ipt_ACCOUNT, so I
figured I'd tackle it. Attached is my patch that seems to work; it
builds for 3.4.104, loads, counts to at least 100GB, produces no
obvious kernel gripes, and adjacent counters don't seem to interfere
with each other.
The theory:
- Use two kernel pages for the counters for each group of 256
addresses.
- Change counters to 64-bit.
- Change to __get_free_pages/free_pages, using order=2 (two
consecutive pages), and zero both pages.
- Change "%u" to "%llu" as needed.
- Everything else pretty much stays the same.
I also changed tmpbuf to two pages (Justin Case's idea), but I
don't know if that's really necessary.
Did I miss anything?
Thanks,
Neal
--
ipt_ACCOUNT - see http://www.intra2net.com/en/developer/ipt_ACCOUNT for details.
To unsubscribe send a mail to ipt_ACCOUNT+unsubscribe@xxxxxxxxxxxxxxxxxxxxxxx
64-bit-counters.patch
Description: Text Data
|
