net: Make ip_ra_chain per struct net
This is optimization, which makes ip_call_ra_chain()
iterate less sockets to find the sockets it's looking for.
Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/ip_sockglue.c b/net/ipv4/ip_sockglue.c
index bf5f44b..f36d35f 100644
--- a/net/ipv4/ip_sockglue.c
+++ b/net/ipv4/ip_sockglue.c
@@ -322,18 +322,6 @@ int ip_cmsg_send(struct sock *sk, struct msghdr *msg, struct ipcm_cookie *ipc,
return 0;
}
-
-/* Special input handler for packets caught by router alert option.
- They are selected only by protocol field, and then processed likely
- local ones; but only if someone wants them! Otherwise, router
- not running rsvpd will kill RSVP.
-
- It is user level problem, what it will make with them.
- I have no idea, how it will masquearde or NAT them (it is joke, joke :-)),
- but receiver should be enough clever f.e. to forward mtrace requests,
- sent to multicast group to reach destination designated router.
- */
-struct ip_ra_chain __rcu *ip_ra_chain;
static DEFINE_SPINLOCK(ip_ra_lock);
@@ -350,6 +338,7 @@ int ip_ra_control(struct sock *sk, unsigned char on,
{
struct ip_ra_chain *ra, *new_ra;
struct ip_ra_chain __rcu **rap;
+ struct net *net = sock_net(sk);
if (sk->sk_type != SOCK_RAW || inet_sk(sk)->inet_num == IPPROTO_RAW)
return -EINVAL;
@@ -357,7 +346,7 @@ int ip_ra_control(struct sock *sk, unsigned char on,
new_ra = on ? kmalloc(sizeof(*new_ra), GFP_KERNEL) : NULL;
spin_lock_bh(&ip_ra_lock);
- for (rap = &ip_ra_chain;
+ for (rap = &net->ipv4.ra_chain;
(ra = rcu_dereference_protected(*rap,
lockdep_is_held(&ip_ra_lock))) != NULL;
rap = &ra->next) {
