net: add net available in build_state

The build_state callback of lwtunnel doesn't contain the net namespace
structure yet. This patch will add it so we can check on specific
address configuration at creation time of rpl source routes.

Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/ip_fib.h b/include/net/ip_fib.h
index dabe398..59e0d4e 100644
--- a/include/net/ip_fib.h
+++ b/include/net/ip_fib.h
@@ -470,8 +470,9 @@
 		struct fib_config *cfg, int nh_weight,
 		struct netlink_ext_ack *extack);
 void fib_nh_release(struct net *net, struct fib_nh *fib_nh);
-int fib_nh_common_init(struct fib_nh_common *nhc, struct nlattr *fc_encap,
-		       u16 fc_encap_type, void *cfg, gfp_t gfp_flags,
+int fib_nh_common_init(struct net *net, struct fib_nh_common *nhc,
+		       struct nlattr *fc_encap, u16 fc_encap_type,
+		       void *cfg, gfp_t gfp_flags,
 		       struct netlink_ext_ack *extack);
 void fib_nh_common_release(struct fib_nh_common *nhc);
 
diff --git a/include/net/lwtunnel.h b/include/net/lwtunnel.h
index b5e6edf..05cfd6f 100644
--- a/include/net/lwtunnel.h
+++ b/include/net/lwtunnel.h
@@ -34,7 +34,7 @@
 };
 
 struct lwtunnel_encap_ops {
-	int (*build_state)(struct nlattr *encap,
+	int (*build_state)(struct net *net, struct nlattr *encap,
 			   unsigned int family, const void *cfg,
 			   struct lwtunnel_state **ts,
 			   struct netlink_ext_ack *extack);
@@ -113,7 +113,7 @@
 			      struct netlink_ext_ack *extack);
 int lwtunnel_valid_encap_type_attr(struct nlattr *attr, int len,
 				   struct netlink_ext_ack *extack);
-int lwtunnel_build_state(u16 encap_type,
+int lwtunnel_build_state(struct net *net, u16 encap_type,
 			 struct nlattr *encap,
 			 unsigned int family, const void *cfg,
 			 struct lwtunnel_state **lws,
@@ -209,7 +209,7 @@
 	return 0;
 }
 
-static inline int lwtunnel_build_state(u16 encap_type,
+static inline int lwtunnel_build_state(struct net *net, u16 encap_type,
 				       struct nlattr *encap,
 				       unsigned int family, const void *cfg,
 				       struct lwtunnel_state **lws,
diff --git a/net/core/lwt_bpf.c b/net/core/lwt_bpf.c
index 99a6de5..7d34382 100644
--- a/net/core/lwt_bpf.c
+++ b/net/core/lwt_bpf.c
@@ -367,7 +367,7 @@
 	[LWT_BPF_XMIT_HEADROOM]	= { .type = NLA_U32 },
 };
 
-static int bpf_build_state(struct nlattr *nla,
+static int bpf_build_state(struct net *net, struct nlattr *nla,
 			   unsigned int family, const void *cfg,
 			   struct lwtunnel_state **ts,
 			   struct netlink_ext_ack *extack)
diff --git a/net/core/lwtunnel.c b/net/core/lwtunnel.c
index 2f9c0de..4cd0395 100644
--- a/net/core/lwtunnel.c
+++ b/net/core/lwtunnel.c
@@ -98,7 +98,7 @@
 }
 EXPORT_SYMBOL_GPL(lwtunnel_encap_del_ops);
 
-int lwtunnel_build_state(u16 encap_type,
+int lwtunnel_build_state(struct net *net, u16 encap_type,
 			 struct nlattr *encap, unsigned int family,
 			 const void *cfg, struct lwtunnel_state **lws,
 			 struct netlink_ext_ack *extack)
@@ -122,7 +122,7 @@
 	rcu_read_unlock();
 
 	if (found) {
-		ret = ops->build_state(encap, family, cfg, lws, extack);
+		ret = ops->build_state(net, encap, family, cfg, lws, extack);
 		if (ret)
 			module_put(ops->owner);
 	} else {
diff --git a/net/ipv4/fib_lookup.h b/net/ipv4/fib_lookup.h
index c092e9a..818916b 100644
--- a/net/ipv4/fib_lookup.h
+++ b/net/ipv4/fib_lookup.h
@@ -35,7 +35,7 @@
 void fib_release_info(struct fib_info *);
 struct fib_info *fib_create_info(struct fib_config *cfg,
 				 struct netlink_ext_ack *extack);
-int fib_nh_match(struct fib_config *cfg, struct fib_info *fi,
+int fib_nh_match(struct net *net, struct fib_config *cfg, struct fib_info *fi,
 		 struct netlink_ext_ack *extack);
 bool fib_metrics_match(struct fib_config *cfg, struct fib_info *fi);
 int fib_dump_info(struct sk_buff *skb, u32 pid, u32 seq, int event,
diff --git a/net/ipv4/fib_semantics.c b/net/ipv4/fib_semantics.c
index e4c62b8..6ed8c93 100644
--- a/net/ipv4/fib_semantics.c
+++ b/net/ipv4/fib_semantics.c
@@ -570,8 +570,9 @@
 	return 1;
 }
 
-int fib_nh_common_init(struct fib_nh_common *nhc, struct nlattr *encap,
-		       u16 encap_type, void *cfg, gfp_t gfp_flags,
+int fib_nh_common_init(struct net *net, struct fib_nh_common *nhc,
+		       struct nlattr *encap, u16 encap_type,
+		       void *cfg, gfp_t gfp_flags,
 		       struct netlink_ext_ack *extack)
 {
 	int err;
@@ -589,8 +590,9 @@
 			err = -EINVAL;
 			goto lwt_failure;
 		}
-		err = lwtunnel_build_state(encap_type, encap, nhc->nhc_family,
-					   cfg, &lwtstate, extack);
+		err = lwtunnel_build_state(net, encap_type, encap,
+					   nhc->nhc_family, cfg, &lwtstate,
+					   extack);
 		if (err)
 			goto lwt_failure;
 
@@ -614,7 +616,7 @@
 
 	nh->fib_nh_family = AF_INET;
 
-	err = fib_nh_common_init(&nh->nh_common, cfg->fc_encap,
+	err = fib_nh_common_init(net, &nh->nh_common, cfg->fc_encap,
 				 cfg->fc_encap_type, cfg, GFP_KERNEL, extack);
 	if (err)
 		return err;
@@ -814,7 +816,7 @@
 
 #endif /* CONFIG_IP_ROUTE_MULTIPATH */
 
-static int fib_encap_match(u16 encap_type,
+static int fib_encap_match(struct net *net, u16 encap_type,
 			   struct nlattr *encap,
 			   const struct fib_nh *nh,
 			   const struct fib_config *cfg,
@@ -826,7 +828,7 @@
 	if (encap_type == LWTUNNEL_ENCAP_NONE)
 		return 0;
 
-	ret = lwtunnel_build_state(encap_type, encap, AF_INET,
+	ret = lwtunnel_build_state(net, encap_type, encap, AF_INET,
 				   cfg, &lwtstate, extack);
 	if (!ret) {
 		result = lwtunnel_cmp_encap(lwtstate, nh->fib_nh_lws);
@@ -836,7 +838,7 @@
 	return result;
 }
 
-int fib_nh_match(struct fib_config *cfg, struct fib_info *fi,
+int fib_nh_match(struct net *net, struct fib_config *cfg, struct fib_info *fi,
 		 struct netlink_ext_ack *extack)
 {
 #ifdef CONFIG_IP_ROUTE_MULTIPATH
@@ -857,8 +859,8 @@
 		struct fib_nh *nh = fib_info_nh(fi, 0);
 
 		if (cfg->fc_encap) {
-			if (fib_encap_match(cfg->fc_encap_type, cfg->fc_encap,
-					    nh, cfg, extack))
+			if (fib_encap_match(net, cfg->fc_encap_type,
+					    cfg->fc_encap, nh, cfg, extack))
 				return 1;
 		}
 #ifdef CONFIG_IP_ROUTE_CLASSID
diff --git a/net/ipv4/fib_trie.c b/net/ipv4/fib_trie.c
index f4c2ac4..b01b748 100644
--- a/net/ipv4/fib_trie.c
+++ b/net/ipv4/fib_trie.c
@@ -1679,7 +1679,7 @@
 		     fi->fib_prefsrc == cfg->fc_prefsrc) &&
 		    (!cfg->fc_protocol ||
 		     fi->fib_protocol == cfg->fc_protocol) &&
-		    fib_nh_match(cfg, fi, extack) == 0 &&
+		    fib_nh_match(net, cfg, fi, extack) == 0 &&
 		    fib_metrics_match(cfg, fi)) {
 			fa_to_delete = fa;
 			break;
diff --git a/net/ipv4/ip_tunnel_core.c b/net/ipv4/ip_tunnel_core.c
index 47f8b94..181b7a2 100644
--- a/net/ipv4/ip_tunnel_core.c
+++ b/net/ipv4/ip_tunnel_core.c
@@ -432,7 +432,7 @@
 	return ip_tun_parse_opts(attr, info, extack);
 }
 
-static int ip_tun_build_state(struct nlattr *attr,
+static int ip_tun_build_state(struct net *net, struct nlattr *attr,
 			      unsigned int family, const void *cfg,
 			      struct lwtunnel_state **ts,
 			      struct netlink_ext_ack *extack)
@@ -719,7 +719,7 @@
 	[LWTUNNEL_IP6_OPTS]		= { .type = NLA_NESTED },
 };
 
-static int ip6_tun_build_state(struct nlattr *attr,
+static int ip6_tun_build_state(struct net *net, struct nlattr *attr,
 			       unsigned int family, const void *cfg,
 			       struct lwtunnel_state **ts,
 			       struct netlink_ext_ack *extack)
diff --git a/net/ipv6/ila/ila_lwt.c b/net/ipv6/ila/ila_lwt.c
index 422dcc6..8c1ce78 100644
--- a/net/ipv6/ila/ila_lwt.c
+++ b/net/ipv6/ila/ila_lwt.c
@@ -125,7 +125,7 @@
 	[ILA_ATTR_HOOK_TYPE] = { .type = NLA_U8, },
 };
 
-static int ila_build_state(struct nlattr *nla,
+static int ila_build_state(struct net *net, struct nlattr *nla,
 			   unsigned int family, const void *cfg,
 			   struct lwtunnel_state **ts,
 			   struct netlink_ext_ack *extack)
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index afcde55..310cbdd 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -3471,7 +3471,7 @@
 	    !netif_carrier_ok(dev))
 		fib6_nh->fib_nh_flags |= RTNH_F_LINKDOWN;
 
-	err = fib_nh_common_init(&fib6_nh->nh_common, cfg->fc_encap,
+	err = fib_nh_common_init(net, &fib6_nh->nh_common, cfg->fc_encap,
 				 cfg->fc_encap_type, cfg, gfp_flags, extack);
 	if (err)
 		goto out;
diff --git a/net/ipv6/seg6_iptunnel.c b/net/ipv6/seg6_iptunnel.c
index ac837af..c7cbfea 100644
--- a/net/ipv6/seg6_iptunnel.c
+++ b/net/ipv6/seg6_iptunnel.c
@@ -376,7 +376,7 @@
 	return err;
 }
 
-static int seg6_build_state(struct nlattr *nla,
+static int seg6_build_state(struct net *net, struct nlattr *nla,
 			    unsigned int family, const void *cfg,
 			    struct lwtunnel_state **ts,
 			    struct netlink_ext_ack *extack)
diff --git a/net/ipv6/seg6_local.c b/net/ipv6/seg6_local.c
index 8165802..5249342 100644
--- a/net/ipv6/seg6_local.c
+++ b/net/ipv6/seg6_local.c
@@ -970,8 +970,9 @@
 	return 0;
 }
 
-static int seg6_local_build_state(struct nlattr *nla, unsigned int family,
-				  const void *cfg, struct lwtunnel_state **ts,
+static int seg6_local_build_state(struct net *net, struct nlattr *nla,
+				  unsigned int family, const void *cfg,
+				  struct lwtunnel_state **ts,
 				  struct netlink_ext_ack *extack)
 {
 	struct nlattr *tb[SEG6_LOCAL_MAX + 1];
diff --git a/net/mpls/mpls_iptunnel.c b/net/mpls/mpls_iptunnel.c
index 44b6750..2def857 100644
--- a/net/mpls/mpls_iptunnel.c
+++ b/net/mpls/mpls_iptunnel.c
@@ -162,7 +162,7 @@
 	return -EINVAL;
 }
 
-static int mpls_build_state(struct nlattr *nla,
+static int mpls_build_state(struct net *net, struct nlattr *nla,
 			    unsigned int family, const void *cfg,
 			    struct lwtunnel_state **ts,
 			    struct netlink_ext_ack *extack)