Re: [PATCH net-next] net: move inet_dport/inet_num in sock_common

Eric Dumazet
2012-11-27T21:24:38Z

On Tue, 2012-11-27 at 09:23 -0800, Joe Perches wrote:
> On Tue, 2012-11-27 at 07:06 -0800, Eric Dumazet wrote:
> > From: Eric Dumazet <edumazet@google.com>
> >
> > commit 68835aba4d9b (net: optimize INET input path further)
> > moved some fields used for tcp/udp sockets lookup in the first cache
> > line of struct sock_common.
> []
> > diff --git a/include/linux/ipv6.h b/include/linux/ipv6.h
> > index 5e11905..196ede4 100644
> > --- a/include/linux/ipv6.h
> > +++ b/include/linux/ipv6.h
> > @@ -365,19 +365,21 @@ static inline struct raw6_sock *raw6_sk(const struct sock *sk)
> > #endif /* IS_ENABLED(CONFIG_IPV6) */
> >
> > #define INET6_MATCH(__sk, __net, __hash, __saddr, __daddr, __ports, __dif)\
> > + (((__sk)->sk_hash == (__hash)) && \
> > + ((*((__portpair *)&(inet_sk(__sk)->inet_dport))) == (__ports)) && \
> > + ((__sk)->sk_family == AF_INET6) && \
>
> Perhaps these could be |'d together to avoid the test/jump
> after each comparison by using some bit operations instead.
>
> > + ipv6_addr_equal(&inet6_sk(__sk)->daddr, (__saddr)) && \
> > + ipv6_addr_equal(&inet6_sk(__sk)->rcv_saddr, (__daddr)) && \
> > + (!((__sk)->sk_bound_dev_if) || ((__sk)->sk_bound_dev_if == (__dif))) && \
> > + net_eq(sock_net(__sk), (__net)))
>
>

But it would be wrong.