netfilter: nf_conntrack: prepare namespace support for l3 protocol trackers
This patch prepares the namespace support for layer 3 protocol trackers.
Basically, this modifies the following interfaces:
* nf_ct_l3proto_[un]register_sysctl.
* nf_conntrack_l3proto_[un]register.
We add a new nf_ct_l3proto_net is used to get the pernet data of l3proto.
This adds rhe new struct nf_ip_net that is used to store the sysctl header
and l3proto_ipv4,l4proto_tcp(6),l4proto_udp(6),l4proto_icmp(v6) because the
protos such tcp and tcp6 use the same data,so making nf_ip_net as a field
of netns_ct is the easiest way to manager it.
This patch also adds init_net to struct nf_conntrack_l3proto to initial
the layer 3 protocol pernet data.
Acked-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Gao feng <gaofeng@cn.fujitsu.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
diff --git a/include/net/netfilter/nf_conntrack_l3proto.h b/include/net/netfilter/nf_conntrack_l3proto.h
index 9699c02..d6df8c7 100644
--- a/include/net/netfilter/nf_conntrack_l3proto.h
+++ b/include/net/netfilter/nf_conntrack_l3proto.h
@@ -69,6 +69,9 @@
struct ctl_table *ctl_table;
#endif /* CONFIG_SYSCTL */
+ /* Init l3proto pernet data */
+ int (*init_net)(struct net *net);
+
/* Module (if any) which this is connected to. */
struct module *me;
};
@@ -76,8 +79,10 @@
extern struct nf_conntrack_l3proto __rcu *nf_ct_l3protos[AF_MAX];
/* Protocol registration. */
-extern int nf_conntrack_l3proto_register(struct nf_conntrack_l3proto *proto);
-extern void nf_conntrack_l3proto_unregister(struct nf_conntrack_l3proto *proto);
+extern int nf_conntrack_l3proto_register(struct net *net,
+ struct nf_conntrack_l3proto *proto);
+extern void nf_conntrack_l3proto_unregister(struct net *net,
+ struct nf_conntrack_l3proto *proto);
extern struct nf_conntrack_l3proto *nf_ct_l3proto_find_get(u_int16_t l3proto);
extern void nf_ct_l3proto_put(struct nf_conntrack_l3proto *p);
diff --git a/include/net/netns/conntrack.h b/include/net/netns/conntrack.h
index 1f53038..b2dbcc5 100644
--- a/include/net/netns/conntrack.h
+++ b/include/net/netns/conntrack.h
@@ -20,6 +20,13 @@
unsigned int users;
};
+struct nf_ip_net {
+#if defined(CONFIG_SYSCTL) && defined(CONFIG_NF_CONNTRACK_PROC_COMPAT)
+ struct ctl_table_header *ctl_table_header;
+ struct ctl_table *ctl_table;
+#endif
+};
+
struct netns_ct {
atomic_t count;
unsigned int expect_count;
@@ -40,6 +47,7 @@
unsigned int sysctl_log_invalid; /* Log invalid packets */
int sysctl_auto_assign_helper;
bool auto_assign_helper_warned;
+ struct nf_ip_net nf_ct_proto;
#ifdef CONFIG_SYSCTL
struct ctl_table_header *sysctl_header;
struct ctl_table_header *acct_sysctl_header;