Hi Jakub,
On Tue, Mar 15, 2022 at 11:56:44AM -0700, Jakub Kicinski wrote:
> On Tue, 15 Mar 2022 10:15:09 +0100 Pablo Neira Ayuso wrote:
> > + return false
> > +#ifdef CONFIG_NF_TABLES_INET
> > + || family == NFPROTO_INET
> > +#endif
> > +#ifdef CONFIG_NF_TABLES_IPV4
> > + || family == NFPROTO_IPV4
> > +#endif
> > +#ifdef CONFIG_NF_TABLES_ARP
> > + || family == NFPROTO_ARP
> > +#endif
> > +#ifdef CONFIG_NF_TABLES_NETDEV
> > + || family == NFPROTO_NETDEV
> > +#endif
> > +#if IS_ENABLED(CONFIG_NF_TABLES_BRIDGE)
>
> is there a reason this one is IS_ENABLED() and everything else is ifdef?
I based my patch on the existing ifdefs in nft_chain_filter.c where
these config symbols are checked exactly like above. Looking at git
history, the check was changed from a simple ifdef in commit
dfee0e99bcff7 ("netfilter: bridge: make NF_TABLES_BRIDGE tristate").
> > + || family == NFPROTO_BRIDGE
> > +#endif
> > +#ifdef CONFIG_NF_TABLES_IPV6
> > + || family == NFPROTO_IPV6
> > +#endif
> > + ;
>
> return (IS_ENABLED(CONFIG_NF_TABLES_INET) && family == NFPROTO_INET)) ||
> (IS_ENABLED(CONFIG_NF_TABLES_IPV4) && family == NFPROTO_IPV4)) ||
> ...
>
> would have also been an option, for future reference.
Yes, that is indeed much cleaner. I wasn't aware of this possibility
using IS_ENABLED. What do you think, worth a follow-up?
Thanks, Phil
