1 files changed, 39 insertions, 33 deletions

diff --git a/include/net/xfrm.h b/include/net/xfrm.h
index 2308210793a0..d2efddce65d4 100644
--- a/include/net/xfrm.h
+++ b/include/net/xfrm.h
@@ -128,6 +128,7 @@ struct xfrm_state_walk {
 
 struct xfrm_state_offload {
 	struct net_device	*dev;
+	netdevice_tracker	dev_tracker;
 	struct net_device	*real_dev;
 	unsigned long		offload_handle;
 	unsigned int		num_exthdrs;
@@ -200,6 +201,11 @@ struct xfrm_state {
 	struct xfrm_algo_aead	*aead;
 	const char		*geniv;
 
+	/* mapping change rate limiting */
+	__be16 new_mapping_sport;
+	u32 new_mapping;	/* seconds */
+	u32 mapping_maxage;	/* seconds for input SA */
+
 	/* Data for encapsulator */
 	struct xfrm_encap_tmpl	*encap;
 	struct sock __rcu	*encap_sk;
@@ -1075,24 +1081,29 @@ xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, un
 }
 
 #ifdef CONFIG_XFRM
-static inline bool
-xfrm_default_allow(struct net *net, int dir)
-{
-	u8 def = net->xfrm.policy_default;
-
-	switch (dir) {
-	case XFRM_POLICY_IN:
-		return def & XFRM_POL_DEFAULT_IN ? false : true;
-	case XFRM_POLICY_OUT:
-		return def & XFRM_POL_DEFAULT_OUT ? false : true;
-	case XFRM_POLICY_FWD:
-		return def & XFRM_POL_DEFAULT_FWD ? false : true;
-	}
+int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb,
+			unsigned short family);
+
+static inline bool __xfrm_check_nopolicy(struct net *net, struct sk_buff *skb,
+					 int dir)
+{
+	if (!net->xfrm.policy_count[dir] && !secpath_exists(skb))
+		return net->xfrm.policy_default[dir] == XFRM_USERPOLICY_ACCEPT;
+
 	return false;
 }
 
-int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb,
-			unsigned short family);
+static inline bool __xfrm_check_dev_nopolicy(struct sk_buff *skb,
+					     int dir, unsigned short family)
+{
+	if (dir != XFRM_POLICY_OUT && family == AF_INET) {
+		/* same dst may be used for traffic originating from
+		 * devices with different policy settings.
+		 */
+		return IPCB(skb)->flags & IPSKB_NOPOLICY;
+	}
+	return skb_dst(skb) && (skb_dst(skb)->flags & DST_NOPOLICY);
+}
 
 static inline int __xfrm_policy_check2(struct sock *sk, int dir,
 				       struct sk_buff *skb,
@@ -1104,13 +1115,9 @@ static inline int __xfrm_policy_check2(struct sock *sk, int dir,
 	if (sk && sk->sk_policy[XFRM_POLICY_IN])
 		return __xfrm_policy_check(sk, ndir, skb, family);
 
-	if (xfrm_default_allow(net, dir))
-		return (!net->xfrm.policy_count[dir] && !secpath_exists(skb)) ||
-		       (skb_dst(skb) && (skb_dst(skb)->flags & DST_NOPOLICY)) ||
-		       __xfrm_policy_check(sk, ndir, skb, family);
-	else
-		return (skb_dst(skb) && (skb_dst(skb)->flags & DST_NOPOLICY)) ||
-		       __xfrm_policy_check(sk, ndir, skb, family);
+	return __xfrm_check_nopolicy(net, skb, dir) ||
+	       __xfrm_check_dev_nopolicy(skb, dir, family) ||
+	       __xfrm_policy_check(sk, ndir, skb, family);
 }
 
 static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
@@ -1162,13 +1169,12 @@ static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family)
 {
 	struct net *net = dev_net(skb->dev);
 
-	if (xfrm_default_allow(net, XFRM_POLICY_FWD))
-		return !net->xfrm.policy_count[XFRM_POLICY_OUT] ||
-			(skb_dst(skb)->flags & DST_NOXFRM) ||
-			__xfrm_route_forward(skb, family);
-	else
-		return (skb_dst(skb)->flags & DST_NOXFRM) ||
-			__xfrm_route_forward(skb, family);
+	if (!net->xfrm.policy_count[XFRM_POLICY_OUT] &&
+	    net->xfrm.policy_default[XFRM_POLICY_OUT] == XFRM_USERPOLICY_ACCEPT)
+		return true;
+
+	return (skb_dst(skb)->flags & DST_NOXFRM) ||
+	       __xfrm_route_forward(skb, family);
 }
 
 static inline int xfrm4_route_forward(struct sk_buff *skb)
@@ -1562,7 +1568,6 @@ void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si);
 void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si);
 u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq);
 int xfrm_init_replay(struct xfrm_state *x);
-u32 __xfrm_state_mtu(struct xfrm_state *x, int mtu);
 u32 xfrm_state_mtu(struct xfrm_state *x, int mtu);
 int __xfrm_init_state(struct xfrm_state *x, bool init_replay, bool offload);
 int xfrm_init_state(struct xfrm_state *x);
@@ -1675,14 +1680,15 @@ int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
 	       const struct xfrm_migrate *m, int num_bundles,
 	       const struct xfrm_kmaddress *k,
 	       const struct xfrm_encap_tmpl *encap);
-struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net);
+struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net,
+						u32 if_id);
 struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x,
 				      struct xfrm_migrate *m,
 				      struct xfrm_encap_tmpl *encap);
 int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
 		 struct xfrm_migrate *m, int num_bundles,
 		 struct xfrm_kmaddress *k, struct net *net,
-		 struct xfrm_encap_tmpl *encap);
+		 struct xfrm_encap_tmpl *encap, u32 if_id);
 #endif
 
 int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
@@ -1913,7 +1919,7 @@ static inline void xfrm_dev_state_free(struct xfrm_state *x)
 		if (dev->xfrmdev_ops->xdo_dev_state_free)
 			dev->xfrmdev_ops->xdo_dev_state_free(x);
 		xso->dev = NULL;
-		dev_put(dev);
+		dev_put_track(dev, &xso->dev_tracker);
 	}
 }
 #else