netdev - Re: [XFRM] Optimize SA dumping

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Date:	Mon, 04 Dec 2006 08:27:46 -0500
From:	jamal <hadi@...erus.ca>
To:	Patrick McHardy <kaber@...sh.net>
Cc:	David Miller <davem@...emloft.net>, netdev@...r.kernel.org
Subject: Re: [XFRM] Optimize SA dumping

On Mon, 2006-04-12 at 13:36 +0100, Patrick McHardy wrote:
> jamal wrote:
> >  	for (i = 0; i <= xfrm_state_hmask; i++) {
> >  		hlist_for_each_entry(x, entry, xfrm_state_bydst+i, bydst) {
> > +			if (count && send_x != last_x) {
> > +				err = func(send_x, count, data);
> > +				if (err)
> > +					goto out;
> > +				send_x = NULL;
> > +			}
> >  			if (!xfrm_id_proto_match(x->id.proto, proto))
> >  				continue;
> 
> After you sent send_x and set it to NULL, it will be different from
> last_x (since that is != NULL) and the NULL pointer will be given
> to func() when continuing here.
> 

This one you lost me. Can you give me an example? one or two SAs found?

In any case, if i go the done callback approach, I can get rid of all
this tracking thing ...

cheers,
jamal

> > -			err = func(x, --count, data);
> > -			if (err)
> > -				goto out;
> > +
> > +			if (!count) {
> > +				last_x = send_x = x;
> > +			} else {
> > +				send_x = last_x;
> > +				last_x = x;
> > +			}
> > +			count++;
> >  		}
> >  	}
> 
> 
> 
> 

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