[NET]: Move generic skbuff stuff from XFRM code to generic code

Move generic skbuff stuff from XFRM code to generic code so that
AF_RXRPC can use it too.

The kdoc comments I've attached to the functions needs to be checked
by whoever wrote them as I had to make some guesses about the workings
of these functions.

Signed-off-By: David Howells <dhowells@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 6 insertions, 0 deletions

diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 92969f662ee4..9b2957d203c9 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -86,6 +86,7 @@
  */
 
 struct net_device;
+struct scatterlist;
 
 #if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
 struct nf_conntrack {
@@ -347,6 +348,11 @@ extern struct sk_buff *skb_realloc_headroom(struct sk_buff *skb,
 extern struct sk_buff *skb_copy_expand(const struct sk_buff *skb,
                                        int newheadroom, int newtailroom,
                                        gfp_t priority);
+extern int             skb_to_sgvec(struct sk_buff *skb,
+                                    struct scatterlist *sg, int offset,
+                                    int len);
+extern int             skb_cow_data(struct sk_buff *skb, int tailbits,
+                                    struct sk_buff **trailer);
 extern int             skb_pad(struct sk_buff *skb, int pad);
 #define dev_kfree_skb(a)        kfree_skb(a)
 extern void           skb_over_panic(struct sk_buff *skb, int len,