netns xfrm: ->dst_lookup in netns

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/net/xfrm.h

@@ -266,7 +266,8 @@ struct xfrm_policy_afinfo {
 	unsigned short		family;
 	struct dst_ops		*dst_ops;
 	void			(*garbage_collect)(struct net *net);
-	struct dst_entry	*(*dst_lookup)(int tos, xfrm_address_t *saddr,
+	struct dst_entry	*(*dst_lookup)(struct net *net, int tos,
+					       xfrm_address_t *saddr,
 					       xfrm_address_t *daddr);
 	int			(*get_saddr)(xfrm_address_t *saddr, xfrm_address_t *daddr);
 	struct dst_entry	*(*find_bundle)(struct flowi *fl, struct xfrm_policy *policy);

net/ipv4/xfrm4_policy.c

@@ -18,7 +18,8 @@
 static struct dst_ops xfrm4_dst_ops;
 static struct xfrm_policy_afinfo xfrm4_policy_afinfo;
 
-static struct dst_entry *xfrm4_dst_lookup(int tos, xfrm_address_t *saddr,
+static struct dst_entry *xfrm4_dst_lookup(struct net *net, int tos,
+					  xfrm_address_t *saddr,
 					  xfrm_address_t *daddr)
 {
 	struct flowi fl = {
@@ -36,7 +37,7 @@ static struct dst_entry *xfrm4_dst_lookup(int tos, xfrm_address_t *saddr,
 	if (saddr)
 		fl.fl4_src = saddr->a4;
 
-	err = __ip_route_output_key(&init_net, &rt, &fl);
+	err = __ip_route_output_key(net, &rt, &fl);
 	dst = &rt->u.dst;
 	if (err)
 		dst = ERR_PTR(err);
@@ -48,7 +49,7 @@ static int xfrm4_get_saddr(xfrm_address_t *saddr, xfrm_address_t *daddr)
 	struct dst_entry *dst;
 	struct rtable *rt;
 
-	dst = xfrm4_dst_lookup(0, NULL, daddr);
+	dst = xfrm4_dst_lookup(&init_net, 0, NULL, daddr);
 	if (IS_ERR(dst))
 		return -EHOSTUNREACH;
 

net/ipv6/xfrm6_policy.c

@@ -27,7 +27,8 @@
 static struct dst_ops xfrm6_dst_ops;
 static struct xfrm_policy_afinfo xfrm6_policy_afinfo;
 
-static struct dst_entry *xfrm6_dst_lookup(int tos, xfrm_address_t *saddr,
+static struct dst_entry *xfrm6_dst_lookup(struct net *net, int tos,
+					  xfrm_address_t *saddr,
 					  xfrm_address_t *daddr)
 {
 	struct flowi fl = {};
@@ -38,7 +39,7 @@ static struct dst_entry *xfrm6_dst_lookup(int tos, xfrm_address_t *saddr,
 	if (saddr)
 		memcpy(&fl.fl6_src, saddr, sizeof(fl.fl6_src));
 
-	dst = ip6_route_output(&init_net, NULL, &fl);
+	dst = ip6_route_output(net, NULL, &fl);
 
 	err = dst->error;
 	if (dst->error) {
@@ -54,7 +55,7 @@ static int xfrm6_get_saddr(xfrm_address_t *saddr, xfrm_address_t *daddr)
 	struct dst_entry *dst;
 	struct net_device *dev;
 
-	dst = xfrm6_dst_lookup(0, NULL, daddr);
+	dst = xfrm6_dst_lookup(&init_net, 0, NULL, daddr);
 	if (IS_ERR(dst))
 		return -EHOSTUNREACH;
 

net/xfrm/xfrm_policy.c

@@ -92,7 +92,7 @@ int xfrm_selector_match(struct xfrm_selector *sel, struct flowi *fl,
 	return 0;
 }
 
-static inline struct dst_entry *__xfrm_dst_lookup(int tos,
+static inline struct dst_entry *__xfrm_dst_lookup(struct net *net, int tos,
 						  xfrm_address_t *saddr,
 						  xfrm_address_t *daddr,
 						  int family)
@@ -104,7 +104,7 @@ static inline struct dst_entry *__xfrm_dst_lookup(int tos,
 	if (unlikely(afinfo == NULL))
 		return ERR_PTR(-EAFNOSUPPORT);
 
-	dst = afinfo->dst_lookup(tos, saddr, daddr);
+	dst = afinfo->dst_lookup(net, tos, saddr, daddr);
 
 	xfrm_policy_put_afinfo(afinfo);
 
@@ -116,6 +116,7 @@ static inline struct dst_entry *xfrm_dst_lookup(struct xfrm_state *x, int tos,
 						xfrm_address_t *prev_daddr,
 						int family)
 {
+	struct net *net = xs_net(x);
 	xfrm_address_t *saddr = &x->props.saddr;
 	xfrm_address_t *daddr = &x->id.daddr;
 	struct dst_entry *dst;
@@ -129,7 +130,7 @@ static inline struct dst_entry *xfrm_dst_lookup(struct xfrm_state *x, int tos,
 		daddr = x->coaddr;
 	}
 
-	dst = __xfrm_dst_lookup(tos, saddr, daddr, family);
+	dst = __xfrm_dst_lookup(net, tos, saddr, daddr, family);
 
 	if (!IS_ERR(dst)) {
 		if (prev_saddr != saddr)