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Commit def8b4fa authored by Alexey Dobriyan's avatar Alexey Dobriyan Committed by David S. Miller
Browse files

net: reduce structures when XFRM=n 



ifdef out
* struct sk_buff::sp		(pointer)
* struct dst_entry::xfrm	(pointer)
* struct sock::sk_policy	(2 pointers)

Signed-off-by: default avatarAlexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent b057efd4

include/linux/skbuff.h

+14 −1
Original line number Diff line number Diff line
@@ -269,8 +269,9 @@ struct sk_buff { 
		struct  dst_entry	*dst;

		struct  rtable		*rtable;

	};

#ifdef CONFIG_XFRM

	struct	sec_path	*sp;



#endif

	/*

	 * This is the control buffer. It is free to use for every

	 * layer. Please put your private variables there. If you
@@ -1864,6 +1865,18 @@ static inline void skb_copy_queue_mapping(struct sk_buff *to, const struct sk_bu 
	to->queue_mapping = from->queue_mapping;

}



#ifdef CONFIG_XFRM

static inline struct sec_path *skb_sec_path(struct sk_buff *skb)

{

	return skb->sp;

}

#else

static inline struct sec_path *skb_sec_path(struct sk_buff *skb)

{

	return NULL;

}

#endif



static inline int skb_is_gso(const struct sk_buff *skb)

{

	return skb_shinfo(skb)->gso_size;

include/net/dst.h

+2 −1
Original line number Diff line number Diff line
@@ -59,8 +59,9 @@ struct dst_entry 


	struct neighbour	*neighbour;

	struct hh_cache		*hh;

#ifdef CONFIG_XFRM

	struct xfrm_state	*xfrm;



#endif

	int			(*input)(struct sk_buff*);

	int			(*output)(struct sk_buff*);

include/net/sock.h

+2 −0
Original line number Diff line number Diff line
@@ -229,7 +229,9 @@ struct sock { 
	} sk_backlog;

	wait_queue_head_t	*sk_sleep;

	struct dst_entry	*sk_dst_cache;

#ifdef CONFIG_XFRM

	struct xfrm_policy	*sk_policy[2];

#endif

	rwlock_t		sk_dst_lock;

	atomic_t		sk_rmem_alloc;

	atomic_t		sk_wmem_alloc;

include/net/xfrm.h

+4 −0
Original line number Diff line number Diff line
@@ -882,6 +882,7 @@ struct xfrm_dst 
	u32 path_cookie;

};



#ifdef CONFIG_XFRM

static inline void xfrm_dst_destroy(struct xfrm_dst *xdst)

{

	dst_release(xdst->route);
@@ -894,6 +895,7 @@ static inline void xfrm_dst_destroy(struct xfrm_dst *xdst) 
	xdst->partner = NULL;

#endif

}

#endif



extern void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev);
@@ -1536,9 +1538,11 @@ static inline void xfrm_states_delete(struct xfrm_state **states, int n) 
}

#endif



#ifdef CONFIG_XFRM

static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb)

{

	return skb->sp->xvec[skb->sp->len - 1];

}

#endif



#endif	/* _NET_XFRM_H */

net/core/skbuff.c

+1 −1
Original line number Diff line number Diff line
@@ -489,7 +489,7 @@ static void __copy_skb_header(struct sk_buff *new, const struct sk_buff *old) 
	new->network_header	= old->network_header;

	new->mac_header		= old->mac_header;

	new->dst		= dst_clone(old->dst);

#ifdef CONFIG_INET

#ifdef CONFIG_XFRM

	new->sp			= secpath_get(old->sp);

#endif

	memcpy(new->cb, old->cb, sizeof(old->cb));