netns xfrm: dst garbage-collecting in netns

Pass netns pointer to struct xfrm_policy_afinfo::garbage_collect()

	[This needs more thoughts on what to do with dst_ops]
	[Currently stub to init_net]
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/net/xfrm.h

@@ -265,7 +265,7 @@ struct xfrm_dst;
 struct xfrm_policy_afinfo {
 	unsigned short		family;
 	struct dst_ops		*dst_ops;
-	void			(*garbage_collect)(void);
+	void			(*garbage_collect)(struct net *net);
 	struct dst_entry	*(*dst_lookup)(int tos, xfrm_address_t *saddr,
 					       xfrm_address_t *daddr);
 	int			(*get_saddr)(xfrm_address_t *saddr, xfrm_address_t *daddr);

net/ipv4/xfrm4_policy.c

@@ -187,7 +187,7 @@ _decode_session4(struct sk_buff *skb, struct flowi *fl, int reverse)
 
 static inline int xfrm4_garbage_collect(struct dst_ops *ops)
 {
-	xfrm4_policy_afinfo.garbage_collect();
+	xfrm4_policy_afinfo.garbage_collect(&init_net);
 	return (atomic_read(&xfrm4_dst_ops.entries) > xfrm4_dst_ops.gc_thresh*2);
 }
 

net/ipv6/xfrm6_policy.c

@@ -220,7 +220,7 @@ _decode_session6(struct sk_buff *skb, struct flowi *fl, int reverse)
 
 static inline int xfrm6_garbage_collect(struct dst_ops *ops)
 {
-	xfrm6_policy_afinfo.garbage_collect();
+	xfrm6_policy_afinfo.garbage_collect(&init_net);
 	return (atomic_read(&xfrm6_dst_ops.entries) > xfrm6_dst_ops.gc_thresh*2);
 }
 

net/xfrm/xfrm_policy.c

@@ -2173,9 +2173,9 @@ static int unused_bundle(struct dst_entry *dst)
 	return !atomic_read(&dst->__refcnt);
 }
 
-static void __xfrm_garbage_collect(void)
+static void __xfrm_garbage_collect(struct net *net)
 {
-	xfrm_prune_bundles(&init_net, unused_bundle);
+	xfrm_prune_bundles(net, unused_bundle);
 }
 
 static int xfrm_flush_bundles(struct net *net)