ipv6: make lookups simpler and faster
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>
diff --git a/net/l2tp/l2tp_core.c b/net/l2tp/l2tp_core.c
index b076e83..9af77d9 100644
--- a/net/l2tp/l2tp_core.c
+++ b/net/l2tp/l2tp_core.c
@@ -1181,7 +1181,7 @@
!(skb_dst(skb)->dev->features & NETIF_F_IPV6_CSUM)) {
__wsum csum = skb_checksum(skb, 0, udp_len, 0);
skb->ip_summed = CHECKSUM_UNNECESSARY;
- uh->check = csum_ipv6_magic(&np->saddr, &np->daddr, udp_len,
+ uh->check = csum_ipv6_magic(&np->saddr, &sk->sk_v6_daddr, udp_len,
IPPROTO_UDP, csum);
if (uh->check == 0)
uh->check = CSUM_MANGLED_0;
@@ -1189,7 +1189,7 @@
skb->ip_summed = CHECKSUM_PARTIAL;
skb->csum_start = skb_transport_header(skb) - skb->head;
skb->csum_offset = offsetof(struct udphdr, check);
- uh->check = ~csum_ipv6_magic(&np->saddr, &np->daddr,
+ uh->check = ~csum_ipv6_magic(&np->saddr, &sk->sk_v6_daddr,
udp_len, IPPROTO_UDP, 0);
}
}
@@ -1713,13 +1713,13 @@
struct ipv6_pinfo *np = inet6_sk(sk);
if (ipv6_addr_v4mapped(&np->saddr) &&
- ipv6_addr_v4mapped(&np->daddr)) {
+ ipv6_addr_v4mapped(&sk->sk_v6_daddr)) {
struct inet_sock *inet = inet_sk(sk);
tunnel->v4mapped = true;
inet->inet_saddr = np->saddr.s6_addr32[3];
- inet->inet_rcv_saddr = np->rcv_saddr.s6_addr32[3];
- inet->inet_daddr = np->daddr.s6_addr32[3];
+ inet->inet_rcv_saddr = sk->sk_v6_rcv_saddr.s6_addr32[3];
+ inet->inet_daddr = sk->sk_v6_daddr.s6_addr32[3];
} else {
tunnel->v4mapped = false;
}
diff --git a/net/l2tp/l2tp_debugfs.c b/net/l2tp/l2tp_debugfs.c
index 072d720..2d6760a 100644
--- a/net/l2tp/l2tp_debugfs.c
+++ b/net/l2tp/l2tp_debugfs.c
@@ -127,9 +127,10 @@
#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",
diff --git a/net/l2tp/l2tp_ip6.c b/net/l2tp/l2tp_ip6.c
index b8a6039..cfd6530 100644
--- a/net/l2tp/l2tp_ip6.c
+++ b/net/l2tp/l2tp_ip6.c
@@ -63,7 +63,7 @@
struct sock *sk;
sk_for_each_bound(sk, &l2tp_ip6_bind_table) {
- struct in6_addr *addr = inet6_rcv_saddr(sk);
+ const struct in6_addr *addr = inet6_rcv_saddr(sk);
struct l2tp_ip6_sock *l2tp = l2tp_ip6_sk(sk);
if (l2tp == NULL)
@@ -331,7 +331,7 @@
rcu_read_unlock();
inet->inet_rcv_saddr = inet->inet_saddr = v4addr;
- np->rcv_saddr = addr->l2tp_addr;
+ sk->sk_v6_rcv_saddr = addr->l2tp_addr;
np->saddr = addr->l2tp_addr;
l2tp_ip6_sk(sk)->conn_id = addr->l2tp_conn_id;
@@ -421,14 +421,14 @@
if (!lsk->peer_conn_id)
return -ENOTCONN;
lsa->l2tp_conn_id = lsk->peer_conn_id;
- lsa->l2tp_addr = np->daddr;
+ lsa->l2tp_addr = sk->sk_v6_daddr;
if (np->sndflow)
lsa->l2tp_flowinfo = np->flow_label;
} else {
- if (ipv6_addr_any(&np->rcv_saddr))
+ if (ipv6_addr_any(&sk->sk_v6_rcv_saddr))
lsa->l2tp_addr = np->saddr;
else
- lsa->l2tp_addr = np->rcv_saddr;
+ lsa->l2tp_addr = sk->sk_v6_rcv_saddr;
lsa->l2tp_conn_id = lsk->conn_id;
}
@@ -537,8 +537,8 @@
* sk->sk_dst_cache.
*/
if (sk->sk_state == TCP_ESTABLISHED &&
- ipv6_addr_equal(daddr, &np->daddr))
- daddr = &np->daddr;
+ ipv6_addr_equal(daddr, &sk->sk_v6_daddr))
+ daddr = &sk->sk_v6_daddr;
if (addr_len >= sizeof(struct sockaddr_in6) &&
lsa->l2tp_scope_id &&
@@ -548,7 +548,7 @@
if (sk->sk_state != TCP_ESTABLISHED)
return -EDESTADDRREQ;
- daddr = &np->daddr;
+ daddr = &sk->sk_v6_daddr;
fl6.flowlabel = np->flow_label;
}
diff --git a/net/l2tp/l2tp_netlink.c b/net/l2tp/l2tp_netlink.c
index 0825ff2..be446d5 100644
--- a/net/l2tp/l2tp_netlink.c
+++ b/net/l2tp/l2tp_netlink.c
@@ -306,8 +306,8 @@
if (np) {
if (nla_put(skb, L2TP_ATTR_IP6_SADDR, sizeof(np->saddr),
&np->saddr) ||
- nla_put(skb, L2TP_ATTR_IP6_DADDR, sizeof(np->daddr),
- &np->daddr))
+ nla_put(skb, L2TP_ATTR_IP6_DADDR, sizeof(sk->sk_v6_daddr),
+ &sk->sk_v6_daddr))
goto nla_put_failure;
} else
#endif
diff --git a/net/l2tp/l2tp_ppp.c b/net/l2tp/l2tp_ppp.c
index 5ebee2d..f0a7ada 100644
--- a/net/l2tp/l2tp_ppp.c
+++ b/net/l2tp/l2tp_ppp.c
@@ -906,8 +906,8 @@
#if IS_ENABLED(CONFIG_IPV6)
} else if ((tunnel->version == 2) &&
(tunnel->sock->sk_family == AF_INET6)) {
- struct ipv6_pinfo *np = inet6_sk(tunnel->sock);
struct sockaddr_pppol2tpin6 sp;
+
len = sizeof(sp);
memset(&sp, 0, len);
sp.sa_family = AF_PPPOX;
@@ -920,13 +920,13 @@
sp.pppol2tp.d_session = session->peer_session_id;
sp.pppol2tp.addr.sin6_family = AF_INET6;
sp.pppol2tp.addr.sin6_port = inet->inet_dport;
- memcpy(&sp.pppol2tp.addr.sin6_addr, &np->daddr,
- sizeof(np->daddr));
+ memcpy(&sp.pppol2tp.addr.sin6_addr, &tunnel->sock->sk_v6_daddr,
+ sizeof(tunnel->sock->sk_v6_daddr));
memcpy(uaddr, &sp, len);
} else if ((tunnel->version == 3) &&
(tunnel->sock->sk_family == AF_INET6)) {
- struct ipv6_pinfo *np = inet6_sk(tunnel->sock);
struct sockaddr_pppol2tpv3in6 sp;
+
len = sizeof(sp);
memset(&sp, 0, len);
sp.sa_family = AF_PPPOX;
@@ -939,8 +939,8 @@
sp.pppol2tp.d_session = session->peer_session_id;
sp.pppol2tp.addr.sin6_family = AF_INET6;
sp.pppol2tp.addr.sin6_port = inet->inet_dport;
- memcpy(&sp.pppol2tp.addr.sin6_addr, &np->daddr,
- sizeof(np->daddr));
+ memcpy(&sp.pppol2tp.addr.sin6_addr, &tunnel->sock->sk_v6_daddr,
+ sizeof(tunnel->sock->sk_v6_daddr));
memcpy(uaddr, &sp, len);
#endif
} else if (tunnel->version == 3) {