Re: IP Acounting Idea for 2.5

Manfred Bartz (md-linux-kernel@logi.cc)
18 Apr 2001 08:58:49 +1000


Leif Sawyer <lsawyer@gci.com> writes:

> > > Jesse Pollard replies:

> > Removing/no-oping the reset code would make the module
> > SMALLER, and simpler.

> NO. Don't remove the functionality that is required.

Please explain where counter reset capability provides any
functionality that is not already available without it.

You might want to read RFC2724 ``Traffic Flow Measurement''.
Search for ``reset''.

Counter resets have always caused problems, that's why mission
critical counters never have a reset. Have you ever seen an
electricity, gas or water meter with a reset? The same reasoning
applies when you have accounting rules that are used to charge
customers for traffic volume.

> Fix your userspace applications to behave correctly. If _you_
> require your userspace applications to not clear counters, then fix
> the application.

You are confused. What would you say if a close() by another,
unrelated application closed all open descriptors for that file,
including the one you just opened? Just fix your applications?

-- 
Manfred Bartz
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