net: tracepoint: using sock_set_state tracepoint to trace SCTP state transition

With changes in inet_ files, SCTP state transitions are traced with
inet_sock_set_state tracepoint.
As SCTP state names, i.e. SCTP_SS_CLOSED, SCTP_SS_ESTABLISHED,
have the same value with TCP state names. So the output info still print
the TCP state names, that makes the code easy.
Signed-off-by: Yafang Shao <laoar.shao@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/sctp/endpointola.c

@@ -232,7 +232,7 @@ void sctp_endpoint_free(struct sctp_endpoint *ep)
 {
 	ep->base.dead = true;
 
-	ep->base.sk->sk_state = SCTP_SS_CLOSED;
+	inet_sk_set_state(ep->base.sk, SCTP_SS_CLOSED);
 
 	/* Unlink this endpoint, so we can't find it again! */
 	sctp_unhash_endpoint(ep);

net/sctp/sm_sideeffect.c

@@ -878,12 +878,12 @@ static void sctp_cmd_new_state(struct sctp_cmd_seq *cmds,
 		 * successfully completed a connect() call.
 		 */
 		if (sctp_state(asoc, ESTABLISHED) && sctp_sstate(sk, CLOSED))
-			sk->sk_state = SCTP_SS_ESTABLISHED;
+			inet_sk_set_state(sk, SCTP_SS_ESTABLISHED);
 
 		/* Set the RCV_SHUTDOWN flag when a SHUTDOWN is received. */
 		if (sctp_state(asoc, SHUTDOWN_RECEIVED) &&
 		    sctp_sstate(sk, ESTABLISHED)) {
-			sk->sk_state = SCTP_SS_CLOSING;
+			inet_sk_set_state(sk, SCTP_SS_CLOSING);
 			sk->sk_shutdown |= RCV_SHUTDOWN;
 		}
 	}

net/sctp/socket.c

@@ -1544,7 +1544,7 @@ static void sctp_close(struct sock *sk, long timeout)
 
 	lock_sock_nested(sk, SINGLE_DEPTH_NESTING);
 	sk->sk_shutdown = SHUTDOWN_MASK;
-	sk->sk_state = SCTP_SS_CLOSING;
+	inet_sk_set_state(sk, SCTP_SS_CLOSING);
 
 	ep = sctp_sk(sk)->ep;
 
@@ -4657,7 +4657,7 @@ static void sctp_shutdown(struct sock *sk, int how)
 	if (how & SEND_SHUTDOWN && !list_empty(&ep->asocs)) {
 		struct sctp_association *asoc;
 
-		sk->sk_state = SCTP_SS_CLOSING;
+		inet_sk_set_state(sk, SCTP_SS_CLOSING);
 		asoc = list_entry(ep->asocs.next,
 				  struct sctp_association, asocs);
 		sctp_primitive_SHUTDOWN(net, asoc, NULL);
@@ -7513,13 +7513,13 @@ static int sctp_listen_start(struct sock *sk, int backlog)
 	 * sockets.
 	 *
 	 */
-	sk->sk_state = SCTP_SS_LISTENING;
+	inet_sk_set_state(sk, SCTP_SS_LISTENING);
 	if (!ep->base.bind_addr.port) {
 		if (sctp_autobind(sk))
 			return -EAGAIN;
 	} else {
 		if (sctp_get_port(sk, inet_sk(sk)->inet_num)) {
-			sk->sk_state = SCTP_SS_CLOSED;
+			inet_sk_set_state(sk, SCTP_SS_CLOSED);
 			return -EADDRINUSE;
 		}
 	}
@@ -8542,10 +8542,10 @@ static void sctp_sock_migrate(struct sock *oldsk, struct sock *newsk,
 	 * is called, set RCV_SHUTDOWN flag.
 	 */
 	if (sctp_state(assoc, CLOSED) && sctp_style(newsk, TCP)) {
-		newsk->sk_state = SCTP_SS_CLOSED;
+		inet_sk_set_state(newsk, SCTP_SS_CLOSED);
 		newsk->sk_shutdown |= RCV_SHUTDOWN;
 	} else {
-		newsk->sk_state = SCTP_SS_ESTABLISHED;
+		inet_sk_set_state(newsk, SCTP_SS_ESTABLISHED);
 	}
 
 	release_sock(newsk);