[RFC,net-next v2 5/8] net: unix: Support MSG_NTCOPY

[Joe Damato]

Add support for MSG_NTCOPY to unix sockets. The helper function
msg_set_iter_copy_type is used to set the copy flag on the iovec iterator
correctly.

Signed-off-by: Joe Damato <jdamato@xxxxxxxxxx>
---
 net/unix/af_unix.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c
index 3453e00..b8f522d 100644
--- a/net/unix/af_unix.c
+++ b/net/unix/af_unix.c
@@ -1905,6 +1905,8 @@ static int unix_dgram_sendmsg(struct socket *sock, struct msghdr *msg,
 	skb_put(skb, len - data_len);
 	skb->data_len = data_len;
 	skb->len = len;
+
+	msg_set_iter_copy_type(msg);
 	err = skb_copy_datagram_from_iter(skb, 0, &msg->msg_iter, len);
 	if (err)
 		goto out_free;
@@ -2165,6 +2167,8 @@ static int unix_stream_sendmsg(struct socket *sock, struct msghdr *msg,
 		skb_put(skb, size - data_len);
 		skb->data_len = data_len;
 		skb->len = size;
+
+		msg_set_iter_copy_type(msg);
 		err = skb_copy_datagram_from_iter(skb, 0, &msg->msg_iter, size);
 		if (err) {
 			kfree_skb(skb);
-- 
2.7.4