On Fri, May 29, 2015 at 03:07:07PM +0300, Andrew Vagin wrote:
> > +static int recharge_xtables(struct xt_table_info *new, struct
> > xt_table_info *old)
> > +{
> > + struct user_beancounter *ub, *old_ub;
> > + long change;
> > +
> > + ub = new->ub;
> > + old_ub = old->number ? old->ub : ub;
> > + change = (long)new->number - (long)old->number;
> > + if (old_ub != ub) {
> > + printk(KERN_WARNING "iptables resources are charged"
> > + " from different UB (%s -> %s)\n",
> > + old_ub->ub_name, ub->ub_name);
> > + change = new->number;
>
> do we need to unchage old->number from old_ub?
We do it below.
>
> > + }
> > +
> > + if (change > 0) {
> > + if (charge_beancounter(ub, UB_NUMXTENT, change, UB_SOFT))
> > + return -ENOMEM;
> > + } else if (change < 0)
> > + uncharge_beancounter(ub, UB_NUMXTENT, -change);
> > +
> > + if (old_ub != ub)
> > + uncharge_beancounter(old_ub, UB_NUMXTENT, old->number);
> > +
> > + return 0;
> > +}
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