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[NETNS]: Make icmpv6_sk per namespace.

Browse source 
All preparations are done. Now just add a hook to perform an
initialization on namespace startup and replace icmpv6_sk macro with
proper inline call.  Actual namespace the packet belongs too will be
passed later along with the one for the routing.

Signed-off-by: Denis V. Lunev <den@openvz.org>
Acked-by: Daniel Lezcano <dlezcano@fr.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Denis V. Lunev 2008-02-29 11:21:22 -08:00 committed by David S. Miller
parent 4a6ad7a141
commit 98c6d1b261
2 changed files with 48 additions and 21 deletions
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1
include/net/netns/ipv6.h
View file

@ -36,5 +36,6 @@ struct netns_ipv6 {
struct xt_table *ip6table_mangle; struct xt_table *ip6table_mangle;
struct xt_table *ip6table_raw; struct xt_table *ip6table_raw;
#endif #endif
struct sock **icmp_sk;
}; };
#endif #endif

68
net/ipv6/icmp.c
View file

@ -80,8 +80,10 @@ EXPORT_SYMBOL(icmpv6msg_statistics);
* *
* On SMP we have one ICMP socket per-cpu. * On SMP we have one ICMP socket per-cpu.
*/ */
static struct sock **__icmpv6_sk = NULL; static inline struct sock *icmpv6_sk(struct net *net)
#define icmpv6_sk (__icmpv6_sk[smp_processor_id()]) {
return net->ipv6.icmp_sk[smp_processor_id()];
}
static int icmpv6_rcv(struct sk_buff *skb); static int icmpv6_rcv(struct sk_buff *skb);
@ -389,7 +391,7 @@ void icmpv6_send(struct sk_buff *skb, int type, int code, __u32 info,
fl.fl_icmp_code = code; fl.fl_icmp_code = code;
security_skb_classify_flow(skb, &fl); security_skb_classify_flow(skb, &fl);
sk = icmpv6_sk; sk = icmpv6_sk(&init_net);
np = inet6_sk(sk); np = inet6_sk(sk);
if (icmpv6_xmit_lock(sk)) if (icmpv6_xmit_lock(sk))
@ -535,7 +537,7 @@ static void icmpv6_echo_reply(struct sk_buff *skb)
fl.fl_icmp_type = ICMPV6_ECHO_REPLY; fl.fl_icmp_type = ICMPV6_ECHO_REPLY;
security_skb_classify_flow(skb, &fl); security_skb_classify_flow(skb, &fl);
sk = icmpv6_sk; sk = icmpv6_sk(&init_net);
np = inet6_sk(sk); np = inet6_sk(sk);
if (icmpv6_xmit_lock(sk)) if (icmpv6_xmit_lock(sk))
@ -780,13 +782,14 @@ drop_no_count:
*/ */
static struct lock_class_key icmpv6_socket_sk_dst_lock_key; static struct lock_class_key icmpv6_socket_sk_dst_lock_key;
int __init icmpv6_init(void) static int __net_init icmpv6_sk_init(struct net *net)
{ {
struct sock *sk; struct sock *sk;
int err, i, j; int err, i, j;
__icmpv6_sk = kzalloc(nr_cpu_ids * sizeof(struct sock *), GFP_KERNEL); net->ipv6.icmp_sk =
if (__icmpv6_sk == NULL) kzalloc(nr_cpu_ids * sizeof(struct sock *), GFP_KERNEL);
if (net->ipv6.icmp_sk == NULL)
return -ENOMEM; return -ENOMEM;
for_each_possible_cpu(i) { for_each_possible_cpu(i) {
@ -801,8 +804,8 @@ int __init icmpv6_init(void)
goto fail; goto fail;
} }
__icmpv6_sk[i] = sk = sock->sk; net->ipv6.icmp_sk[i] = sk = sock->sk;
sk_change_net(sk, &init_net); sk_change_net(sk, net);
sk->sk_allocation = GFP_ATOMIC; sk->sk_allocation = GFP_ATOMIC;
/* /*
@ -822,33 +825,56 @@ int __init icmpv6_init(void)
sk->sk_prot->unhash(sk); sk->sk_prot->unhash(sk);
} }
if (inet6_add_protocol(&icmpv6_protocol, IPPROTO_ICMPV6) < 0) {
printk(KERN_ERR "Failed to register ICMP6 protocol\n");
err = -EAGAIN;
goto fail;
}
return 0; return 0;
fail: fail:
for (j = 0; j < i; j++) for (j = 0; j < i; j++)
sk_release_kernel(__icmpv6_sk[j]); sk_release_kernel(net->ipv6.icmp_sk[j]);
kfree(net->ipv6.icmp_sk);
return err; return err;
} }
void icmpv6_cleanup(void) static void __net_exit icmpv6_sk_exit(struct net *net)
{ {
int i; int i;
for_each_possible_cpu(i) { for_each_possible_cpu(i) {
sk_release_kernel(__icmpv6_sk[i]); sk_release_kernel(net->ipv6.icmp_sk[i]);
} }
kfree(net->ipv6.icmp_sk);
}
static struct pernet_operations __net_initdata icmpv6_sk_ops = {
.init = icmpv6_sk_init,
.exit = icmpv6_sk_exit,
};
int __init icmpv6_init(void)
{
int err;
err = register_pernet_subsys(&icmpv6_sk_ops);
if (err < 0)
return err;
err = -EAGAIN;
if (inet6_add_protocol(&icmpv6_protocol, IPPROTO_ICMPV6) < 0)
goto fail;
return 0;
fail:
printk(KERN_ERR "Failed to register ICMP6 protocol\n");
unregister_pernet_subsys(&icmpv6_sk_ops);
return err;
}
void __exit icmpv6_cleanup(void)
{
unregister_pernet_subsys(&icmpv6_sk_ops);
inet6_del_protocol(&icmpv6_protocol, IPPROTO_ICMPV6); inet6_del_protocol(&icmpv6_protocol, IPPROTO_ICMPV6);
} }
static const struct icmp6_err { static const struct icmp6_err {
int err; int err;
int fatal; int fatal;