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ipv6: make lookups simpler and faster

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TCP listener refactoring, part 4 :

To speed up inet lookups, we moved IPv4 addresses from inet to struct
sock_common

Now is time to do the same for IPv6, because it permits us to have fast
lookups for all kind of sockets, including upcoming SYN_RECV.

Getting IPv6 addresses in TCP lookups currently requires two extra cache
lines, plus a dereference (and memory stall).

inet6_sk(sk) does the dereference of inet_sk(__sk)->pinet6

This patch is way bigger than its IPv4 counter part, because for IPv4,
we could add aliases (inet_daddr, inet_rcv_saddr), while on IPv6,
it's not doable easily.

inet6_sk(sk)->daddr becomes sk->sk_v6_daddr
inet6_sk(sk)->rcv_saddr becomes sk->sk_v6_rcv_saddr

And timewait socket also have tw->tw_v6_daddr & tw->tw_v6_rcv_saddr
at the same offset.

We get rid of INET6_TW_MATCH() as INET6_MATCH() is now the generic
macro.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2013-10-03 15:42:29 -07:00 • committed by David S. Miller
parent 05dbc7b594
commit efe4208f47
35 changed files with 213 additions and 288 deletions
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5
net/l2tp/l2tp_debugfs.c
View file

@ -127,9 +127,10 @@ static void l2tp_dfs_seq_tunnel_show(struct seq_file *m, void *v)
#if IS_ENABLED(CONFIG_IPV6)
if (tunnel->sock->sk_family == AF_INET6) {
struct ipv6_pinfo *np = inet6_sk(tunnel->sock);
const struct ipv6_pinfo *np = inet6_sk(tunnel->sock);
seq_printf(m, " from %pI6c to %pI6c\n",
&np->saddr, &np->daddr);
&np->saddr, &tunnel->sock->sk_v6_daddr);
} else
#endif
seq_printf(m, " from %pI4 to %pI4\n",