Lock down a socket, milestone 1.

o Add a mutex (sb_mtx) to struct sockbuf. This protects the data in a
  socket buffer. The mutex in the receive buffer also protects the data
  in struct socket.

o Determine the lock strategy for each members in struct socket.

o Lock down the following members:

  - so_count
  - so_options
  - so_linger
  - so_state

o Remove *_locked() socket APIs.  Make the following socket APIs
  touching the members above now require a locked socket:

 - sodisconnect()
 - soisconnected()
 - soisconnecting()
 - soisdisconnected()
 - soisdisconnecting()
 - sofree()
 - soref()
 - sorele()
 - sorwakeup()
 - sotryfree()
 - sowakeup()
 - sowwakeup()

Reviewed by:	alfred

1 files changed, 4 insertions, 1 deletions

diff --git a/sys/netncp/ncp_sock.c b/sys/netncp/ncp_sock.c
index 3d585b3..a16964d 100644
--- a/sys/netncp/ncp_sock.c
+++ b/sys/netncp/ncp_sock.c
@@ -86,15 +86,18 @@ ncp_soconnect(struct socket *so,struct sockaddr *target, struct proc *p) {
 	 */
 	error = EIO;
 	s = splnet();
+	SOCK_LOCK(so);
 	while ((so->so_state & SS_ISCONNECTING) && so->so_error == 0) {
-		(void) tsleep((caddr_t)&so->so_timeo, PSOCK, "ncpcon", 2 * hz);
+		(void) msleep((caddr_t)&so->so_timeo, SOCK_MTX(so), PSOCK, "ncpcon", 2 * hz);
 		if ((so->so_state & SS_ISCONNECTING) &&
 		    so->so_error == 0 /*&& rep &&*/) {
 			so->so_state &= ~SS_ISCONNECTING;
+			SOCK_UNLOCK(so);
 			splx(s);
 			goto bad;
 		}
 	}
+	SOCK_UNLOCK(so);
 	if (so->so_error) {
 		error = so->so_error;
 		so->so_error = 0;