---
fs/splice.c | 16 ++++++++++++++++
include/linux/net.h | 2 ++
include/linux/pipe_fs_i.h | 1 +
include/net/tcp.h | 3 +++
net/socket.c | 13 +++++++++++++
5 files changed, 35 insertions(+), 0 deletions(-)
diff --git a/fs/splice.c b/fs/splice.c
index c6a880b..3a4202d 100644
--- a/fs/splice.c
+++ b/fs/splice.c
@@ -123,6 +123,12 @@ error:
return err;
}
+void generic_sock_buf_release(struct pipe_inode_info *pipe,
+ struct pipe_buffer *buf)
+{
+ put_page(buf->page);
+}
+
static struct pipe_buf_operations page_cache_pipe_buf_ops = {
.can_merge = 0,
.map = generic_pipe_buf_map,
@@ -133,6 +139,16 @@ static struct pipe_buf_operations page_c
.get = generic_pipe_buf_get,
};
+static struct pipe_buf_operations sock_buf_ops = {
+ .can_merge = 0,
+ .map = generic_pipe_buf_map,
+ .unmap = generic_pipe_buf_unmap,
+ .pin = generic_pipe_buf_pin,
+ .release = generic_sock_buf_release,
+ .steal = generic_pipe_buf_steal,
+ .get = generic_pipe_buf_get,
+};
+
static int user_page_pipe_buf_steal(struct pipe_inode_info *pipe,
struct pipe_buffer *buf)
{
diff --git a/include/linux/net.h b/include/linux/net.h
index b20c53c..65dfe0c 100644
--- a/include/linux/net.h
+++ b/include/linux/net.h
@@ -164,6 +164,8 @@ 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/pipe_fs_i.h b/include/linux/pipe_fs_i.h
index 9067985..f7f439b 100644
--- a/include/linux/pipe_fs_i.h
+++ b/include/linux/pipe_fs_i.h
@@ -72,6 +72,7 @@ void generic_pipe_buf_get(struct pipe_in
int generic_pipe_buf_pin(struct pipe_inode_info *, struct pipe_buffer *);
int generic_pipe_buf_steal(struct pipe_inode_info *, struct pipe_buffer *);
+void generic_sock_buf_release(struct pipe_inode_info *, struct pipe_buffer *);
/*
* splice is tied to pipes as a transport (at least for now), so we'll just
* add the splice flags here.
diff --git a/include/net/tcp.h b/include/net/tcp.h
index 7a093d0..5032501 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -300,6 +300,9 @@ extern void tcp_cleanup_rbuf(struct so
extern int tcp_twsk_unique(struct sock *sk,
struct sock *sktw, void *twp);
+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)
{
diff --git a/net/socket.c b/net/socket.c
index 6d261bf..8a4f602 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -117,6 +117,8 @@ static ssize_t sock_writev(struct file *
unsigned long count, loff_t *ppos);
static ssize_t sock_sendpage(struct file *file, struct page *page,
int offset, size_t size, loff_t *ppos, int more);
+static ssize_t sock_splice_read(struct file *file, loff_t *ppos,
+ struct pipe_inode_info *pipe, size_t len,
unsigned int flags);
/*
* Socket files have a set of 'special' operations as well as the generic
file ones. These don't appear
@@ -141,6 +143,7 @@ static struct file_operations socket_fil
.writev = sock_writev,
.sendpage = sock_sendpage,
.splice_write = generic_splice_sendpage,
+ .splice_read = sock_splice_read,
};
/*
@@ -701,6 +704,16 @@ static ssize_t sock_sendpage(struct file
return sock->ops->sendpage(sock, page, offset, size, flags);
}
+static ssize_t sock_splice_read(struct file *file, loff_t *ppos,
+ struct pipe_inode_info *pipe, size_t len,
unsigned int flags)
+{
+ struct socket *sock;
+
+ sock = file->private_data;
+
+ return sock->ops->splice_read(sock, ppos, pipe, len, flags);
+}
+
static struct sock_iocb *alloc_sock_iocb(struct kiocb *iocb,
char __user *ubuf, size_t size, struct sock_iocb *siocb)
{
-
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