net: Add and use skb_copy_datagram_msg() helper.
This encapsulates all of the skb_copy_datagram_iovec() callers
with call argument signature "skb, offset, msghdr->msg_iov, length".
When we move to iov_iters in the networking, the iov_iter object will
sit in the msghdr.
Having a helper like this means there will be less places to touch
during that transformation.
Based upon descriptions and patch from Al Viro.
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/appletalk/ddp.c b/net/appletalk/ddp.c
index c00897f..425942d 100644
--- a/net/appletalk/ddp.c
+++ b/net/appletalk/ddp.c
@@ -1758,7 +1758,7 @@
copied = size;
msg->msg_flags |= MSG_TRUNC;
}
- err = skb_copy_datagram_iovec(skb, offset, msg->msg_iov, copied);
+ err = skb_copy_datagram_msg(skb, offset, msg, copied);
if (!err && msg->msg_name) {
DECLARE_SOCKADDR(struct sockaddr_at *, sat, msg->msg_name);