[TCP]: Splice receive support.

Support for network splice receive.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

3 files changed, 12 insertions, 0 deletions

diff --git a/include/linux/net.h b/include/linux/net.h
index 596131ea46f4..0235d917d5c3 100644
--- a/include/linux/net.h
+++ b/include/linux/net.h
@@ -22,6 +22,7 @@
 #include <asm/socket.h>
 
 struct poll_table_struct;
+struct pipe_inode_info;
 struct inode;
 struct net;
 
@@ -172,6 +173,8 @@ struct proto_ops {
                                       struct vm_area_struct * vma);
         ssize_t         (*sendpage)  (struct socket *sock, struct page *page,
                                       int offset, size_t size, int flags);
+        ssize_t         (*splice_read)(struct socket *sock,  loff_t *ppos,
+                                       struct pipe_inode_info *pipe, size_t len, unsigned int flags);
 };
 
 struct net_proto_family {
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index bddd50bd6878..d39f53ef66bb 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -95,6 +95,7 @@
 
 struct net_device;
 struct scatterlist;
+struct pipe_inode_info;
 
 #if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
 struct nf_conntrack {
@@ -1559,6 +1560,11 @@ extern int	       skb_store_bits(struct sk_buff *skb, int offset,
 extern __wsum          skb_copy_and_csum_bits(const struct sk_buff *skb,
                                               int offset, u8 *to, int len,
                                               __wsum csum);
+extern int             skb_splice_bits(struct sk_buff *skb,
+                                                unsigned int offset,
+                                                struct pipe_inode_info *pipe,
+                                                unsigned int len,
+                                                unsigned int flags);
 extern void            skb_copy_and_csum_dev(const struct sk_buff *skb, u8 *to);
 extern void            skb_split(struct sk_buff *skb,
                                  struct sk_buff *skb1, const u32 len);
diff --git a/include/net/tcp.h b/include/net/tcp.h
index cb5b033e0e59..d893b4480769 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -309,6 +309,9 @@ extern int			tcp_twsk_unique(struct sock *sk,
 
 extern void                     tcp_twsk_destructor(struct sock *sk);
 
+extern ssize_t                  tcp_splice_read(struct socket *sk, loff_t *ppos,
+                                                struct pipe_inode_info *pipe, size_t len, unsigned int flags);
+
 static inline void tcp_dec_quickack_mode(struct sock *sk,
                                          const unsigned int pkts)
 {