net: af_unix: implement splice for stream af_unix sockets

unix_stream_recvmsg is refactored to unix_stream_read_generic in this
patch and enhanced to deal with pipe splicing. The refactoring is
inneglible, we mostly have to deal with a non-existing struct msghdr
argument.

Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/fs/splice.c b/fs/splice.c
index bfe62ae..4f355a1 100644 (file)
--- a/fs/splice.c
+++ b/fs/splice.c
@@ -261,6 +261,7 @@ ssize_t splice_to_pipe(struct pipe_inode_info *pipe,
 
        return ret;
 }
+EXPORT_SYMBOL_GPL(splice_to_pipe);
 
 void spd_release_page(struct splice_pipe_desc *spd, unsigned int i)
 {

diff --cc net/core/skbuff.c
Simple merge

diff --cc net/unix/af_unix.c
Simple merge