Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next

Pablo Neira Ayuso says:

===================
Netfilter updates for net-next

The following batch contains Netfilter updates for net-next, they are:

1) Move nft_expr_clone() to nft_dynset, from Paul Gortmaker.

2) Do not include module.h from net/netfilter/nf_tables.h,
   also from Paul.

3) Restrict conntrack sysctl entries to boolean, from Tonghao Zhang.

4) Several patches to add infrastructure to autoload NAT helper
   modules from their respective conntrack helper, this also includes
   the first client of this code in OVS, patches from Flavio Leitner.

5) Add support to match for conntrack ID, from Brett Mastbergen.

6) Spelling fix in connlabel, from Colin Ian King.

7) Use struct_size() from hashlimit, from Gustavo A. R. Silva.

8) Add optimized version of nf_inet_addr_mask(), from Li RongQing.
===================

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

3 files changed, 29 insertions, 21 deletions

diff --git a/include/net/netfilter/nf_conntrack_helper.h b/include/net/netfilter/nf_conntrack_helper.h
index ec52a8dc32fd..44b5a00a9c64 100644
--- a/include/net/netfilter/nf_conntrack_helper.h
+++ b/include/net/netfilter/nf_conntrack_helper.h
@@ -15,6 +15,11 @@
 #include <net/netfilter/nf_conntrack_extend.h>
 #include <net/netfilter/nf_conntrack_expect.h>
 
+#define NF_NAT_HELPER_PREFIX		"ip_nat_"
+#define NF_NAT_HELPER_NAME(name)	NF_NAT_HELPER_PREFIX name
+#define MODULE_ALIAS_NF_NAT_HELPER(name) \
+	MODULE_ALIAS(NF_NAT_HELPER_NAME(name))
+
 struct module;
 
 enum nf_ct_helper_flags {
@@ -54,6 +59,8 @@ struct nf_conntrack_helper {
 	unsigned int queue_num;
 	/* length of userspace private data stored in nf_conn_help->data */
 	u16 data_len;
+	/* name of NAT helper module */
+	char nat_mod_name[NF_CT_HELPER_NAME_LEN];
 };
 
 /* Must be kept in sync with the classes defined by helpers */
@@ -153,4 +160,21 @@ nf_ct_helper_expectfn_find_by_symbol(const void *symbol);
 extern struct hlist_head *nf_ct_helper_hash;
 extern unsigned int nf_ct_helper_hsize;
 
+struct nf_conntrack_nat_helper {
+	struct list_head list;
+	char mod_name[NF_CT_HELPER_NAME_LEN];	/* module name */
+	struct module *module;			/* pointer to self */
+};
+
+#define NF_CT_NAT_HELPER_INIT(name) \
+	{ \
+	.mod_name = NF_NAT_HELPER_NAME(name), \
+	.module = THIS_MODULE \
+	}
+
+void nf_nat_helper_register(struct nf_conntrack_nat_helper *nat);
+void nf_nat_helper_unregister(struct nf_conntrack_nat_helper *nat);
+int nf_nat_helper_try_module_get(const char *name, u16 l3num,
+				 u8 protonum);
+void nf_nat_helper_put(struct nf_conntrack_helper *helper);
 #endif /*_NF_CONNTRACK_HELPER_H*/
diff --git a/include/net/netfilter/nf_tables.h b/include/net/netfilter/nf_tables.h
index 2d5a0a1a87b8..5b8624ae4a27 100644
--- a/include/net/netfilter/nf_tables.h
+++ b/include/net/netfilter/nf_tables.h
@@ -2,7 +2,6 @@
 #ifndef _NET_NF_TABLES_H
 #define _NET_NF_TABLES_H
 
-#include <linux/module.h>
 #include <linux/list.h>
 #include <linux/netfilter.h>
 #include <linux/netfilter/nfnetlink.h>
@@ -13,6 +12,8 @@
 #include <net/netfilter/nf_flow_table.h>
 #include <net/netlink.h>
 
+struct module;
+
 #define NFT_JUMP_STACK_SIZE	16
 
 struct nft_pktinfo {
@@ -806,23 +807,6 @@ void nft_expr_destroy(const struct nft_ctx *ctx, struct nft_expr *expr);
 int nft_expr_dump(struct sk_buff *skb, unsigned int attr,
 		  const struct nft_expr *expr);
 
-static inline int nft_expr_clone(struct nft_expr *dst, struct nft_expr *src)
-{
-	int err;
-
-	if (src->ops->clone) {
-		dst->ops = src->ops;
-		err = src->ops->clone(dst, src);
-		if (err < 0)
-			return err;
-	} else {
-		memcpy(dst, src, src->ops->size);
-	}
-
-	__module_get(src->ops->type->owner);
-	return 0;
-}
-
 /**
  *	struct nft_rule - nf_tables rule
  *
diff --git a/include/net/netns/conntrack.h b/include/net/netns/conntrack.h
index f19b53130bf7..806454e767bf 100644
--- a/include/net/netns/conntrack.h
+++ b/include/net/netns/conntrack.h
@@ -24,9 +24,9 @@ struct nf_generic_net {
 
 struct nf_tcp_net {
 	unsigned int timeouts[TCP_CONNTRACK_TIMEOUT_MAX];
-	unsigned int tcp_loose;
-	unsigned int tcp_be_liberal;
-	unsigned int tcp_max_retrans;
+	int tcp_loose;
+	int tcp_be_liberal;
+	int tcp_max_retrans;
 };
 
 enum udp_conntrack {