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authorEric Dumazet <edumazet@google.com>2014-06-27 08:36:16 -0700
committerDavid S. Miller <davem@davemloft.net>2014-07-01 23:46:21 -0700
commit9fe516ba3fb29b6f6a752ffd93342fdee500ec01 (patch)
tree4254ea02ed5d51d92fd7109d33d28bc95b8d3fb1 /net/ipv6/af_inet6.c
parent090cce42639c2c82bce2cc26a902e4c674c62882 (diff)
downloadop-kernel-dev-9fe516ba3fb29b6f6a752ffd93342fdee500ec01.zip
op-kernel-dev-9fe516ba3fb29b6f6a752ffd93342fdee500ec01.tar.gz
inet: move ipv6only in sock_common
When an UDP application switches from AF_INET to AF_INET6 sockets, we have a small performance degradation for IPv4 communications because of extra cache line misses to access ipv6only information. This can also be noticed for TCP listeners, as ipv6_only_sock() is also used from __inet_lookup_listener()->compute_score() This is magnified when SO_REUSEPORT is used. Move ipv6only into struct sock_common so that it is available at no extra cost in lookups. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/af_inet6.c')
-rw-r--r--net/ipv6/af_inet6.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c
index 7cb4392..a426cd7 100644
--- a/net/ipv6/af_inet6.c
+++ b/net/ipv6/af_inet6.c
@@ -197,7 +197,7 @@ lookup_protocol:
np->mcast_hops = IPV6_DEFAULT_MCASTHOPS;
np->mc_loop = 1;
np->pmtudisc = IPV6_PMTUDISC_WANT;
- np->ipv6only = net->ipv6.sysctl.bindv6only;
+ sk->sk_ipv6only = net->ipv6.sysctl.bindv6only;
/* Init the ipv4 part of the socket since we can have sockets
* using v6 API for ipv4.
@@ -294,7 +294,7 @@ int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
/* Binding to v4-mapped address on a v6-only socket
* makes no sense
*/
- if (np->ipv6only) {
+ if (sk->sk_ipv6only) {
err = -EINVAL;
goto out;
}
@@ -371,7 +371,7 @@ int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
if (addr_type != IPV6_ADDR_ANY) {
sk->sk_userlocks |= SOCK_BINDADDR_LOCK;
if (addr_type != IPV6_ADDR_MAPPED)
- np->ipv6only = 1;
+ sk->sk_ipv6only = 1;
}
if (snum)
sk->sk_userlocks |= SOCK_BINDPORT_LOCK;
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