#ifdef CONFIG_SYSCTL
static int
-nf_ct_register_sysctl(struct ctl_table_header **header, const char *path,
- struct ctl_table *table, unsigned int *users)
+nf_ct_register_sysctl(struct net *net,
+ struct ctl_table_header **header,
+ const char *path,
+ struct ctl_table *table)
{
if (*header == NULL) {
- *header = register_net_sysctl(&init_net, path, table);
+ *header = register_net_sysctl(net, path, table);
if (*header == NULL)
return -ENOMEM;
}
- if (users != NULL)
- (*users)++;
+
return 0;
}
static void
nf_ct_unregister_sysctl(struct ctl_table_header **header,
- struct ctl_table *table, unsigned int *users)
+ struct ctl_table **table,
+ unsigned int users)
{
- if (users != NULL && --*users > 0)
+ if (users > 0)
return;
unregister_net_sysctl_table(*header);
+ kfree(*table);
*header = NULL;
+ *table = NULL;
}
#endif
nf_ct_l3num(i) == l4proto->l3proto;
}
-static int nf_ct_l3proto_register_sysctl(struct nf_conntrack_l3proto *l3proto)
+static struct nf_ip_net *nf_ct_l3proto_net(struct net *net,
+ struct nf_conntrack_l3proto *l3proto)
{
- int err = 0;
+ if (l3proto->l3proto == PF_INET)
+ return &net->ct.nf_ct_proto;
+ else
+ return NULL;
+}
-#ifdef CONFIG_SYSCTL
- if (l3proto->ctl_table != NULL) {
- err = nf_ct_register_sysctl(&l3proto->ctl_table_header,
+static int nf_ct_l3proto_register_sysctl(struct net *net,
+ struct nf_conntrack_l3proto *l3proto)
+{
+ int err = 0;
+ struct nf_ip_net *in = nf_ct_l3proto_net(net, l3proto);
+ /* nf_conntrack_l3proto_ipv6 doesn't support sysctl */
+ if (in == NULL)
+ return 0;
+
+#if defined(CONFIG_SYSCTL) && defined(CONFIG_NF_CONNTRACK_PROC_COMPAT)
+ if (in->ctl_table != NULL) {
+ err = nf_ct_register_sysctl(net,
+ &in->ctl_table_header,
l3proto->ctl_table_path,
- l3proto->ctl_table, NULL);
+ in->ctl_table);
+ if (err < 0) {
+ kfree(in->ctl_table);
+ in->ctl_table = NULL;
+ }
}
#endif
return err;
}
-static void nf_ct_l3proto_unregister_sysctl(struct nf_conntrack_l3proto *l3proto)
+static void nf_ct_l3proto_unregister_sysctl(struct net *net,
+ struct nf_conntrack_l3proto *l3proto)
{
-#ifdef CONFIG_SYSCTL
- if (l3proto->ctl_table_header != NULL)
- nf_ct_unregister_sysctl(&l3proto->ctl_table_header,
- l3proto->ctl_table, NULL);
+ struct nf_ip_net *in = nf_ct_l3proto_net(net, l3proto);
+
+ if (in == NULL)
+ return;
+#if defined(CONFIG_SYSCTL) && defined(CONFIG_NF_CONNTRACK_PROC_COMPAT)
+ if (in->ctl_table_header != NULL)
+ nf_ct_unregister_sysctl(&in->ctl_table_header,
+ &in->ctl_table,
+ 0);
#endif
}
-int nf_conntrack_l3proto_register(struct nf_conntrack_l3proto *proto)
+static int
+nf_conntrack_l3proto_register_net(struct nf_conntrack_l3proto *proto)
{
int ret = 0;
struct nf_conntrack_l3proto *old;
goto out_unlock;
}
- ret = nf_ct_l3proto_register_sysctl(proto);
- if (ret < 0)
- goto out_unlock;
-
if (proto->nlattr_tuple_size)
proto->nla_size = 3 * proto->nlattr_tuple_size();
out_unlock:
mutex_unlock(&nf_ct_proto_mutex);
return ret;
+
}
-EXPORT_SYMBOL_GPL(nf_conntrack_l3proto_register);
-void nf_conntrack_l3proto_unregister(struct nf_conntrack_l3proto *proto)
+int nf_conntrack_l3proto_register(struct net *net,
+ struct nf_conntrack_l3proto *proto)
{
- struct net *net;
+ int ret = 0;
+
+ if (proto->init_net) {
+ ret = proto->init_net(net);
+ if (ret < 0)
+ return ret;
+ }
+
+ ret = nf_ct_l3proto_register_sysctl(net, proto);
+ if (ret < 0)
+ return ret;
+ if (net == &init_net) {
+ ret = nf_conntrack_l3proto_register_net(proto);
+ if (ret < 0)
+ nf_ct_l3proto_unregister_sysctl(net, proto);
+ }
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(nf_conntrack_l3proto_register);
+
+static void
+nf_conntrack_l3proto_unregister_net(struct nf_conntrack_l3proto *proto)
+{
BUG_ON(proto->l3proto >= AF_MAX);
mutex_lock(&nf_ct_proto_mutex);
) != proto);
rcu_assign_pointer(nf_ct_l3protos[proto->l3proto],
&nf_conntrack_l3proto_generic);
- nf_ct_l3proto_unregister_sysctl(proto);
mutex_unlock(&nf_ct_proto_mutex);
synchronize_rcu();
+}
+
+void nf_conntrack_l3proto_unregister(struct net *net,
+ struct nf_conntrack_l3proto *proto)
+{
+ if (net == &init_net)
+ nf_conntrack_l3proto_unregister_net(proto);
+
+ nf_ct_l3proto_unregister_sysctl(net, proto);
/* Remove all contrack entries for this protocol */
rtnl_lock();
- for_each_net(net)
- nf_ct_iterate_cleanup(net, kill_l3proto, proto);
+ nf_ct_iterate_cleanup(net, kill_l3proto, proto);
rtnl_unlock();
}
EXPORT_SYMBOL_GPL(nf_conntrack_l3proto_unregister);
-static int nf_ct_l4proto_register_sysctl(struct nf_conntrack_l4proto *l4proto)
+static struct nf_proto_net *nf_ct_l4proto_net(struct net *net,
+ struct nf_conntrack_l4proto *l4proto)
+{
+ if (l4proto->get_net_proto) {
+ /* statically built-in protocols use static per-net */
+ return l4proto->get_net_proto(net);
+ } else if (l4proto->net_id) {
+ /* ... and loadable protocols use dynamic per-net */
+ return net_generic(net, *l4proto->net_id);
+ }
+ return NULL;
+}
+
+static
+int nf_ct_l4proto_register_sysctl(struct net *net,
+ struct nf_proto_net *pn,
+ struct nf_conntrack_l4proto *l4proto)
{
int err = 0;
#ifdef CONFIG_SYSCTL
- if (l4proto->ctl_table != NULL) {
- err = nf_ct_register_sysctl(l4proto->ctl_table_header,
+ if (pn->ctl_table != NULL) {
+ err = nf_ct_register_sysctl(net,
+ &pn->ctl_table_header,
"net/netfilter",
- l4proto->ctl_table,
- l4proto->ctl_table_users);
- if (err < 0)
- goto out;
+ pn->ctl_table);
+ if (err < 0) {
+ if (!pn->users) {
+ kfree(pn->ctl_table);
+ pn->ctl_table = NULL;
+ }
+ }
}
#ifdef CONFIG_NF_CONNTRACK_PROC_COMPAT
- if (l4proto->ctl_compat_table != NULL) {
- err = nf_ct_register_sysctl(&l4proto->ctl_compat_table_header,
+ if (l4proto->l3proto != AF_INET6 && pn->ctl_compat_table != NULL) {
+ if (err < 0) {
+ nf_ct_kfree_compat_sysctl_table(pn);
+ goto out;
+ }
+ err = nf_ct_register_sysctl(net,
+ &pn->ctl_compat_header,
"net/ipv4/netfilter",
- l4proto->ctl_compat_table, NULL);
+ pn->ctl_compat_table);
if (err == 0)
goto out;
- nf_ct_unregister_sysctl(l4proto->ctl_table_header,
- l4proto->ctl_table,
- l4proto->ctl_table_users);
+
+ nf_ct_kfree_compat_sysctl_table(pn);
+ nf_ct_unregister_sysctl(&pn->ctl_table_header,
+ &pn->ctl_table,
+ pn->users);
}
-#endif /* CONFIG_NF_CONNTRACK_PROC_COMPAT */
out:
+#endif /* CONFIG_NF_CONNTRACK_PROC_COMPAT */
#endif /* CONFIG_SYSCTL */
return err;
}
-static void nf_ct_l4proto_unregister_sysctl(struct nf_conntrack_l4proto *l4proto)
+static
+void nf_ct_l4proto_unregister_sysctl(struct net *net,
+ struct nf_proto_net *pn,
+ struct nf_conntrack_l4proto *l4proto)
{
#ifdef CONFIG_SYSCTL
- if (l4proto->ctl_table_header != NULL &&
- *l4proto->ctl_table_header != NULL)
- nf_ct_unregister_sysctl(l4proto->ctl_table_header,
- l4proto->ctl_table,
- l4proto->ctl_table_users);
+ if (pn->ctl_table_header != NULL)
+ nf_ct_unregister_sysctl(&pn->ctl_table_header,
+ &pn->ctl_table,
+ pn->users);
+
#ifdef CONFIG_NF_CONNTRACK_PROC_COMPAT
- if (l4proto->ctl_compat_table_header != NULL)
- nf_ct_unregister_sysctl(&l4proto->ctl_compat_table_header,
- l4proto->ctl_compat_table, NULL);
+ if (l4proto->l3proto != AF_INET6 && pn->ctl_compat_header != NULL)
+ nf_ct_unregister_sysctl(&pn->ctl_compat_header,
+ &pn->ctl_compat_table,
+ 0);
#endif /* CONFIG_NF_CONNTRACK_PROC_COMPAT */
#endif /* CONFIG_SYSCTL */
}
/* FIXME: Allow NULL functions and sub in pointers to generic for
them. --RR */
-int nf_conntrack_l4proto_register(struct nf_conntrack_l4proto *l4proto)
+static int
+nf_conntrack_l4proto_register_net(struct nf_conntrack_l4proto *l4proto)
{
int ret = 0;
goto out_unlock;
}
- ret = nf_ct_l4proto_register_sysctl(l4proto);
- if (ret < 0)
- goto out_unlock;
-
l4proto->nla_size = 0;
if (l4proto->nlattr_size)
l4proto->nla_size += l4proto->nlattr_size();
rcu_assign_pointer(nf_ct_protos[l4proto->l3proto][l4proto->l4proto],
l4proto);
-
out_unlock:
mutex_unlock(&nf_ct_proto_mutex);
return ret;
}
-EXPORT_SYMBOL_GPL(nf_conntrack_l4proto_register);
-void nf_conntrack_l4proto_unregister(struct nf_conntrack_l4proto *l4proto)
+int nf_conntrack_l4proto_register(struct net *net,
+ struct nf_conntrack_l4proto *l4proto)
{
- struct net *net;
+ int ret = 0;
+ struct nf_proto_net *pn = NULL;
+ if (l4proto->init_net) {
+ ret = l4proto->init_net(net, l4proto->l3proto);
+ if (ret < 0)
+ goto out;
+ }
+
+ pn = nf_ct_l4proto_net(net, l4proto);
+ if (pn == NULL)
+ goto out;
+
+ ret = nf_ct_l4proto_register_sysctl(net, pn, l4proto);
+ if (ret < 0)
+ goto out;
+
+ if (net == &init_net) {
+ ret = nf_conntrack_l4proto_register_net(l4proto);
+ if (ret < 0) {
+ nf_ct_l4proto_unregister_sysctl(net, pn, l4proto);
+ goto out;
+ }
+ }
+
+ pn->users++;
+out:
+ return ret;
+}
+EXPORT_SYMBOL_GPL(nf_conntrack_l4proto_register);
+
+static void
+nf_conntrack_l4proto_unregister_net(struct nf_conntrack_l4proto *l4proto)
+{
BUG_ON(l4proto->l3proto >= PF_MAX);
mutex_lock(&nf_ct_proto_mutex);
) != l4proto);
rcu_assign_pointer(nf_ct_protos[l4proto->l3proto][l4proto->l4proto],
&nf_conntrack_l4proto_generic);
- nf_ct_l4proto_unregister_sysctl(l4proto);
mutex_unlock(&nf_ct_proto_mutex);
synchronize_rcu();
+}
+
+void nf_conntrack_l4proto_unregister(struct net *net,
+ struct nf_conntrack_l4proto *l4proto)
+{
+ struct nf_proto_net *pn = NULL;
+
+ if (net == &init_net)
+ nf_conntrack_l4proto_unregister_net(l4proto);
+
+ pn = nf_ct_l4proto_net(net, l4proto);
+ if (pn == NULL)
+ return;
+
+ pn->users--;
+ nf_ct_l4proto_unregister_sysctl(net, pn, l4proto);
/* Remove all contrack entries for this protocol */
rtnl_lock();
- for_each_net(net)
- nf_ct_iterate_cleanup(net, kill_l4proto, l4proto);
+ nf_ct_iterate_cleanup(net, kill_l4proto, l4proto);
rtnl_unlock();
}
EXPORT_SYMBOL_GPL(nf_conntrack_l4proto_unregister);
-int nf_conntrack_proto_init(void)
+int nf_conntrack_proto_init(struct net *net)
{
unsigned int i;
int err;
+ struct nf_proto_net *pn = nf_ct_l4proto_net(net,
+ &nf_conntrack_l4proto_generic);
- err = nf_ct_l4proto_register_sysctl(&nf_conntrack_l4proto_generic);
+ err = nf_conntrack_l4proto_generic.init_net(net,
+ nf_conntrack_l4proto_generic.l3proto);
+ if (err < 0)
+ return err;
+ err = nf_ct_l4proto_register_sysctl(net,
+ pn,
+ &nf_conntrack_l4proto_generic);
if (err < 0)
return err;
- for (i = 0; i < AF_MAX; i++)
- rcu_assign_pointer(nf_ct_l3protos[i],
- &nf_conntrack_l3proto_generic);
+ if (net == &init_net) {
+ for (i = 0; i < AF_MAX; i++)
+ rcu_assign_pointer(nf_ct_l3protos[i],
+ &nf_conntrack_l3proto_generic);
+ }
+
+ pn->users++;
return 0;
}
-void nf_conntrack_proto_fini(void)
+void nf_conntrack_proto_fini(struct net *net)
{
unsigned int i;
-
- nf_ct_l4proto_unregister_sysctl(&nf_conntrack_l4proto_generic);
-
- /* free l3proto protocol tables */
- for (i = 0; i < PF_MAX; i++)
- kfree(nf_ct_protos[i]);
+ struct nf_proto_net *pn = nf_ct_l4proto_net(net,
+ &nf_conntrack_l4proto_generic);
+
+ pn->users--;
+ nf_ct_l4proto_unregister_sysctl(net,
+ pn,
+ &nf_conntrack_l4proto_generic);
+ if (net == &init_net) {
+ /* free l3proto protocol tables */
+ for (i = 0; i < PF_MAX; i++)
+ kfree(nf_ct_protos[i]);
+ }
}
projects / cascardo / linux.git / blobdiff