netdev - Re: ip xfrm bug

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Date:	Sun, 23 Dec 2007 08:06:45 -0500
From:	jamal <hadi@...erus.ca>
To:	Herbert Xu <herbert@...dor.apana.org.au>
Cc:	Stephen Hemminger <shemminger@...ux-foundation.org>,
	Paul Wouters <paul@...erance.com>, dev@...nswan.org,
	netdev@...r.kernel.org
Subject: Re: ip xfrm bug

On Sun, 2007-16-12 at 15:43 +0800, Herbert Xu wrote:

> Jamal's going to hate me but setkey(8) already uses this so we're
> stuck with it anyway.
> 
> The test is
> 
> 	up->index % 8 >= 3
> 
> This is true iff it's a socket policy.

I would have loved it if user space had a say ;-> 
In the case of tc actions for example; the (table) index abides to the
following rules:

 if user space specified one in rule insertion then {
     if available, use the allowed entry {
     } else if inuse {
         if replace flag is set then {
            replace
        } else {
         return error
     }
  } else {
   grab the next available index
  }

makes management from user space much simpler.

cheers,
jamal

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