netns: embed ip6_dst_ops directly

struct net::ipv6.ip6_dst_ops is separatedly dynamically allocated,
but there is no fundamental reason for it. Embed it directly into
struct netns_ipv6.

For that:
* move struct dst_ops into separate header to fix circular dependencies
	I honestly tried not to, it's pretty impossible to do other way
* drop dynamical allocation, allocate together with netns

For a change, remove struct dst_ops::dst_net, it's deducible
by using container_of() given dst_ops pointer.

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

1 files changed, 2 insertions, 1 deletions

diff --git a/include/net/netns/ipv6.h b/include/net/netns/ipv6.h
index afab4e4cbac7..dfeb2d7c425b 100644
--- a/include/net/netns/ipv6.h
+++ b/include/net/netns/ipv6.h
@@ -6,6 +6,7 @@
 
 #ifndef __NETNS_IPV6_H__
 #define __NETNS_IPV6_H__
+#include <net/dst_ops.h>
 
 struct ctl_table_header;
 
@@ -42,7 +43,7 @@ struct netns_ipv6 {
         struct timer_list       ip6_fib_timer;
         struct hlist_head       *fib_table_hash;
         struct fib6_table       *fib6_main_tbl;
-        struct dst_ops          *ip6_dst_ops;
+        struct dst_ops          ip6_dst_ops;
         unsigned int             ip6_rt_gc_expire;
         unsigned long            ip6_rt_last_gc;
 #ifdef CONFIG_IPV6_MULTIPLE_TABLES