Merge branch 'master' of git://1984.lsi.us.es/nf-next

Pablo Neira Ayuso says:

====================
This batch contains netfilter updates for you net-next tree, they are:

* The new connlabel extension for x_tables, that allows us to attach
  labels to each conntrack flow. The kernel implementation uses a
  bitmask and there's a file in user-space that maps the bits with the
  corresponding string for each existing label. By now, you can attach
  up to 128 overlapping labels. From Florian Westphal.

* A new round of improvements for the netns support for conntrack.
  Gao feng has moved many of the initialization code of each module
  of the netns init path. He also made several code refactoring, that
  code looks cleaner to me now.

* Added documentation for all possible tweaks for nf_conntrack via
  sysctl, from Jiri Pirko.

* Cisco 7941/7945 IP phone support for our SIP conntrack helper,
  from Kevin Cernekee.

* Missing header file in the snmp helper, from Stephen Hemminger.

* Finally, a couple of fixes to resolve minor issues with these
  changes, from myself.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

Documentation/networking/nf_conntrack-sysctl.txt

@@ -0,0 +1,176 @@
+/proc/sys/net/netfilter/nf_conntrack_* Variables:
+
+nf_conntrack_acct - BOOLEAN
+	0 - disabled (default)
+	not 0 - enabled
+
+	Enable connection tracking flow accounting. 64-bit byte and packet
+	counters per flow are added.
+
+nf_conntrack_buckets - INTEGER (read-only)
+	Size of hash table. If not specified as parameter during module
+	loading, the default size is calculated by dividing total memory
+	by 16384 to determine the number of buckets but the hash table will
+	never have fewer than 32 or more than 16384 buckets.
+
+nf_conntrack_checksum - BOOLEAN
+	0 - disabled
+	not 0 - enabled (default)
+
+	Verify checksum of incoming packets. Packets with bad checksums are
+	in INVALID state. If this is enabled, such packets will not be
+	considered for connection tracking.
+
+nf_conntrack_count - INTEGER (read-only)
+	Number of currently allocated flow entries.
+
+nf_conntrack_events - BOOLEAN
+	0 - disabled
+	not 0 - enabled (default)
+
+	If this option is enabled, the connection tracking code will
+	provide userspace with connection tracking events via ctnetlink.
+
+nf_conntrack_events_retry_timeout - INTEGER (seconds)
+	default 15
+
+	This option is only relevant when "reliable connection tracking
+	events" are used.  Normally, ctnetlink is "lossy", that is,
+	events are normally dropped when userspace listeners can't keep up.
+
+	Userspace can request "reliable event mode".  When this mode is
+	active, the conntrack will only be destroyed after the event was
+	delivered.  If event delivery fails, the kernel periodically
+	re-tries to send the event to userspace.
+
+	This is the maximum interval the kernel should use when re-trying
+	to deliver the destroy event.
+
+	A higher number means there will be fewer delivery retries and it
+	will take longer for a backlog to be processed.
+
+nf_conntrack_expect_max - INTEGER
+	Maximum size of expectation table.  Default value is
+	nf_conntrack_buckets / 256. Minimum is 1.
+
+nf_conntrack_frag6_high_thresh - INTEGER
+	default 262144
+
+	Maximum memory used to reassemble IPv6 fragments.  When
+	nf_conntrack_frag6_high_thresh bytes of memory is allocated for this
+	purpose, the fragment handler will toss packets until
+	nf_conntrack_frag6_low_thresh is reached.
+
+nf_conntrack_frag6_low_thresh - INTEGER
+	default 196608
+
+	See nf_conntrack_frag6_low_thresh
+
+nf_conntrack_frag6_timeout - INTEGER (seconds)
+	default 60
+
+	Time to keep an IPv6 fragment in memory.
+
+nf_conntrack_generic_timeout - INTEGER (seconds)
+	default 600
+
+	Default for generic timeout.  This refers to layer 4 unknown/unsupported
+	protocols.
+
+nf_conntrack_helper - BOOLEAN
+	0 - disabled
+	not 0 - enabled (default)
+
+	Enable automatic conntrack helper assignment.
+
+nf_conntrack_icmp_timeout - INTEGER (seconds)
+	default 30
+
+	Default for ICMP timeout.
+
+nf_conntrack_icmpv6_timeout - INTEGER (seconds)
+	default 30
+
+	Default for ICMP6 timeout.
+
+nf_conntrack_log_invalid - INTEGER
+	0   - disable (default)
+	1   - log ICMP packets
+	6   - log TCP packets
+	17  - log UDP packets
+	33  - log DCCP packets
+	41  - log ICMPv6 packets
+	136 - log UDPLITE packets
+	255 - log packets of any protocol
+
+	Log invalid packets of a type specified by value.
+
+nf_conntrack_max - INTEGER
+	Size of connection tracking table.  Default value is
+	nf_conntrack_buckets value * 4.
+
+nf_conntrack_tcp_be_liberal - BOOLEAN
+	0 - disabled (default)
+	not 0 - enabled
+
+	Be conservative in what you do, be liberal in what you accept from others.
+	If it's non-zero, we mark only out of window RST segments as INVALID.
+
+nf_conntrack_tcp_loose - BOOLEAN
+	0 - disabled
+	not 0 - enabled (default)
+
+	If it is set to zero, we disable picking up already established
+	connections.
+
+nf_conntrack_tcp_max_retrans - INTEGER
+	default 3
+
+	Maximum number of packets that can be retransmitted without
+	received an (acceptable) ACK from the destination. If this number
+	is reached, a shorter timer will be started.
+
+nf_conntrack_tcp_timeout_close - INTEGER (seconds)
+	default 10
+
+nf_conntrack_tcp_timeout_close_wait - INTEGER (seconds)
+	default 60
+
+nf_conntrack_tcp_timeout_established - INTEGER (seconds)
+	default 432000 (5 days)
+
+nf_conntrack_tcp_timeout_fin_wait - INTEGER (seconds)
+	default 120
+
+nf_conntrack_tcp_timeout_last_ack - INTEGER (seconds)
+	default 30
+
+nf_conntrack_tcp_timeout_max_retrans - INTEGER (seconds)
+	default 300
+
+nf_conntrack_tcp_timeout_syn_recv - INTEGER (seconds)
+	default 60
+
+nf_conntrack_tcp_timeout_syn_sent - INTEGER (seconds)
+	default 120
+
+nf_conntrack_tcp_timeout_time_wait - INTEGER (seconds)
+	default 120
+
+nf_conntrack_tcp_timeout_unacknowledged - INTEGER (seconds)
+	default 300
+
+nf_conntrack_timestamp - BOOLEAN
+	0 - disabled (default)
+	not 0 - enabled
+
+	Enable connection tracking flow timestamping.
+
+nf_conntrack_udp_timeout - INTEGER (seconds)
+	default 30
+
+nf_conntrack_udp_timeout_stream2 - INTEGER (seconds)
+	default 180
+
+	This extended timeout will be used in case there is an UDP stream
+	detected.

include/linux/netfilter/nf_conntrack_sip.h

@@ -4,12 +4,15 @@
 
 #include <net/netfilter/nf_conntrack_expect.h>
 
+#include <linux/types.h>
+
 #define SIP_PORT	5060
 #define SIP_TIMEOUT	3600
 
 struct nf_ct_sip_master {
 	unsigned int	register_cseq;
 	unsigned int	invite_cseq;
+	__be16		forced_dport;
 };
 
 enum sip_expectation_classes {

include/net/netfilter/nf_conntrack_acct.h

@@ -57,7 +57,9 @@ static inline void nf_ct_set_acct(struct net *net, bool enable)
 	net->ct.sysctl_acct = enable;
 }
 
-extern int nf_conntrack_acct_init(struct net *net);
-extern void nf_conntrack_acct_fini(struct net *net);
+extern int nf_conntrack_acct_pernet_init(struct net *net);
+extern void nf_conntrack_acct_pernet_fini(struct net *net);
 
+extern int nf_conntrack_acct_init(void);
+extern void nf_conntrack_acct_fini(void);
 #endif /* _NF_CONNTRACK_ACCT_H */

include/net/netfilter/nf_conntrack_core.h

@@ -25,12 +25,19 @@ extern unsigned int nf_conntrack_in(struct net *net,
 				    unsigned int hooknum,
 				    struct sk_buff *skb);
 
-extern int nf_conntrack_init(struct net *net);
-extern void nf_conntrack_cleanup(struct net *net);
+extern int nf_conntrack_init_net(struct net *net);
+extern void nf_conntrack_cleanup_net(struct net *net);
 
-extern int nf_conntrack_proto_init(struct net *net);
-extern void nf_conntrack_proto_fini(struct net *net);
+extern int nf_conntrack_proto_pernet_init(struct net *net);
+extern void nf_conntrack_proto_pernet_fini(struct net *net);
 
+extern int nf_conntrack_proto_init(void);
+extern void nf_conntrack_proto_fini(void);
+
+extern int nf_conntrack_init_start(void);
+extern void nf_conntrack_cleanup_start(void);
+
+extern void nf_conntrack_init_end(void);
 extern void nf_conntrack_cleanup_end(void);
 
 extern bool

include/net/netfilter/nf_conntrack_ecache.h

@@ -207,9 +207,11 @@ nf_ct_expect_event(enum ip_conntrack_expect_events event,
 	nf_ct_expect_event_report(event, exp, 0, 0);
 }
 
-extern int nf_conntrack_ecache_init(struct net *net);
-extern void nf_conntrack_ecache_fini(struct net *net);
+extern int nf_conntrack_ecache_pernet_init(struct net *net);
+extern void nf_conntrack_ecache_pernet_fini(struct net *net);
 
+extern int nf_conntrack_ecache_init(void);
+extern void nf_conntrack_ecache_fini(void);
 #else /* CONFIG_NF_CONNTRACK_EVENTS */
 
 static inline void nf_conntrack_event_cache(enum ip_conntrack_events event,
@@ -232,12 +234,21 @@ static inline void nf_ct_expect_event_report(enum ip_conntrack_expect_events e,
  					     u32 portid,
  					     int report) {}
 
-static inline int nf_conntrack_ecache_init(struct net *net)
+static inline int nf_conntrack_ecache_pernet_init(struct net *net)
 {
 	return 0;
 }
 
-static inline void nf_conntrack_ecache_fini(struct net *net)
+static inline void nf_conntrack_ecache_pernet_fini(struct net *net)
+{
+}
+
+static inline int nf_conntrack_ecache_init(void)
+{
+	return 0;
+}
+
+static inline void nf_conntrack_ecache_fini(void)
 {
 }
 #endif /* CONFIG_NF_CONNTRACK_EVENTS */

include/net/netfilter/nf_conntrack_expect.h

@@ -69,8 +69,11 @@ struct nf_conntrack_expect_policy {
 
 #define NF_CT_EXPECT_CLASS_DEFAULT	0
 
-int nf_conntrack_expect_init(struct net *net);
-void nf_conntrack_expect_fini(struct net *net);
+int nf_conntrack_expect_pernet_init(struct net *net);
+void nf_conntrack_expect_pernet_fini(struct net *net);
+
+int nf_conntrack_expect_init(void);
+void nf_conntrack_expect_fini(void);
 
 struct nf_conntrack_expect *
 __nf_ct_expect_find(struct net *net, u16 zone,

include/net/netfilter/nf_conntrack_extend.h

@@ -22,6 +22,9 @@ enum nf_ct_ext_id {
 #endif
 #ifdef CONFIG_NF_CONNTRACK_TIMEOUT
 	NF_CT_EXT_TIMEOUT,
+#endif
+#ifdef CONFIG_NF_CONNTRACK_LABELS
+	NF_CT_EXT_LABELS,
 #endif
 	NF_CT_EXT_NUM,
 };
@@ -33,6 +36,7 @@ enum nf_ct_ext_id {
 #define NF_CT_EXT_ZONE_TYPE struct nf_conntrack_zone
 #define NF_CT_EXT_TSTAMP_TYPE struct nf_conn_tstamp
 #define NF_CT_EXT_TIMEOUT_TYPE struct nf_conn_timeout
+#define NF_CT_EXT_LABELS_TYPE struct nf_conn_labels
 
 /* Extensions: optional stuff which isn't permanently in struct. */
 struct nf_ct_ext {

include/net/netfilter/nf_conntrack_helper.h

@@ -82,8 +82,11 @@ static inline void *nfct_help_data(const struct nf_conn *ct)
 	return (void *)help->data;
 }
 
-extern int nf_conntrack_helper_init(struct net *net);
-extern void nf_conntrack_helper_fini(struct net *net);
+extern int nf_conntrack_helper_pernet_init(struct net *net);
+extern void nf_conntrack_helper_pernet_fini(struct net *net);
+
+extern int nf_conntrack_helper_init(void);
+extern void nf_conntrack_helper_fini(void);
 
 extern int nf_conntrack_broadcast_help(struct sk_buff *skb,
 				       unsigned int protoff,

include/net/netfilter/nf_conntrack_l3proto.h

@@ -76,11 +76,16 @@ struct nf_conntrack_l3proto {
 
 extern struct nf_conntrack_l3proto __rcu *nf_ct_l3protos[AF_MAX];
 
-/* Protocol registration. */
-extern int nf_conntrack_l3proto_register(struct net *net,
+/* Protocol pernet registration. */
+extern int nf_ct_l3proto_pernet_register(struct net *net,
 					 struct nf_conntrack_l3proto *proto);
-extern void nf_conntrack_l3proto_unregister(struct net *net,
+extern void nf_ct_l3proto_pernet_unregister(struct net *net,
 					    struct nf_conntrack_l3proto *proto);
+
+/* Protocol global registration. */
+extern int nf_ct_l3proto_register(struct nf_conntrack_l3proto *proto);
+extern void nf_ct_l3proto_unregister(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);
 

include/net/netfilter/nf_conntrack_l4proto.h

@@ -121,12 +121,16 @@ extern struct nf_conntrack_l4proto *
 nf_ct_l4proto_find_get(u_int16_t l3proto, u_int8_t l4proto);
 extern void nf_ct_l4proto_put(struct nf_conntrack_l4proto *p);
 
-/* Protocol registration. */
-extern int nf_conntrack_l4proto_register(struct net *net,
+/* Protocol pernet registration. */
+extern int nf_ct_l4proto_pernet_register(struct net *net,
 					 struct nf_conntrack_l4proto *proto);
-extern void nf_conntrack_l4proto_unregister(struct net *net,
+extern void nf_ct_l4proto_pernet_unregister(struct net *net,
 					    struct nf_conntrack_l4proto *proto);
 
+/* Protocol global registration. */
+extern int nf_ct_l4proto_register(struct nf_conntrack_l4proto *proto);
+extern void nf_ct_l4proto_unregister(struct nf_conntrack_l4proto *proto);
+
 static inline void nf_ct_kfree_compat_sysctl_table(struct nf_proto_net *pn)
 {
 #if defined(CONFIG_SYSCTL) && defined(CONFIG_NF_CONNTRACK_PROC_COMPAT)