Author: tuexen
Date: Sun Jun  7 14:39:20 2020
New Revision: 361895
URL: https://svnweb.freebsd.org/changeset/base/361895

Log:
  Retire SCTP_SO_LOCK_TESTING.
  
  This was intended to test the locking used in the MacOS X kernel on a
  FreeBSD system, to make use of WITNESS and other debugging infrastructure.
  This hasn't been used for ages, to take it out to reduce the #ifdef
  complexity.
  
  MFC after:            1 week

Modified:
  head/sys/netinet/sctp_auth.c
  head/sys/netinet/sctp_constants.h
  head/sys/netinet/sctp_indata.c
  head/sys/netinet/sctp_input.c
  head/sys/netinet/sctp_output.c
  head/sys/netinet/sctp_output.h
  head/sys/netinet/sctp_sysctl.c
  head/sys/netinet/sctp_sysctl.h
  head/sys/netinet/sctp_usrreq.c
  head/sys/netinet/sctputil.c
  head/sys/netinet/sctputil.h
  head/sys/netinet6/sctp6_usrreq.c

Modified: head/sys/netinet/sctp_auth.c
==============================================================================
--- head/sys/netinet/sctp_auth.c        Sun Jun  7 13:53:23 2020        
(r361894)
+++ head/sys/netinet/sctp_auth.c        Sun Jun  7 14:39:20 2020        
(r361895)
@@ -566,9 +566,7 @@ sctp_auth_key_acquire(struct sctp_tcb *stcb, uint16_t 
 
 void
 sctp_auth_key_release(struct sctp_tcb *stcb, uint16_t key_id, int so_locked
-#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
     SCTP_UNUSED
-#endif
 )
 {
        sctp_sharedkey_t *skey;
@@ -1721,9 +1719,7 @@ sctp_handle_auth(struct sctp_tcb *stcb, struct sctp_au
 void
 sctp_notify_authentication(struct sctp_tcb *stcb, uint32_t indication,
     uint16_t keyid, uint16_t alt_keyid, int so_locked
-#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
     SCTP_UNUSED
-#endif
 )
 {
        struct mbuf *m_notify;

Modified: head/sys/netinet/sctp_constants.h
==============================================================================
--- head/sys/netinet/sctp_constants.h   Sun Jun  7 13:53:23 2020        
(r361894)
+++ head/sys/netinet/sctp_constants.h   Sun Jun  7 14:39:20 2020        
(r361895)
@@ -943,7 +943,7 @@ __FBSDID("$FreeBSD$");
 
 /*-
  * defines for socket lock states.
- * Used by __APPLE__ and SCTP_SO_LOCK_TESTING
+ * Used by __APPLE__
  */
 #define SCTP_SO_LOCKED         1
 #define SCTP_SO_NOT_LOCKED     0

Modified: head/sys/netinet/sctp_indata.c
==============================================================================
--- head/sys/netinet/sctp_indata.c      Sun Jun  7 13:53:23 2020        
(r361894)
+++ head/sys/netinet/sctp_indata.c      Sun Jun  7 14:39:20 2020        
(r361895)
@@ -555,20 +555,6 @@ sctp_queue_data_to_stream(struct sctp_tcb *stcb,
        sctp_ucount_incr(asoc->cnt_on_all_streams);
        nxt_todel = strm->last_mid_delivered + 1;
        if (SCTP_MID_EQ(asoc->idata_supported, nxt_todel, control->mid)) {
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-               struct socket *so;
-
-               so = SCTP_INP_SO(stcb->sctp_ep);
-               atomic_add_int(&stcb->asoc.refcnt, 1);
-               SCTP_TCB_UNLOCK(stcb);
-               SCTP_SOCKET_LOCK(so, 1);
-               SCTP_TCB_LOCK(stcb);
-               atomic_subtract_int(&stcb->asoc.refcnt, 1);
-               if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
-                       SCTP_SOCKET_UNLOCK(so, 1);
-                       return;
-               }
-#endif
                /* can be delivered right away? */
                if (SCTP_BASE_SYSCTL(sctp_logging_level) & 
SCTP_STR_LOGGING_ENABLE) {
                        sctp_log_strm_del(control, NULL, 
SCTP_STR_LOG_FROM_IMMED_DEL);
@@ -638,9 +624,6 @@ sctp_queue_data_to_stream(struct sctp_tcb *stcb,
                        }
                        break;
                }
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-               SCTP_SOCKET_UNLOCK(so, 1);
-#endif
        }
        if (queue_needed) {
                /*
@@ -1956,25 +1939,7 @@ sctp_process_a_data_chunk(struct sctp_tcb *stcb, struc
                 */
                if (stcb->sctp_socket->so_rcv.sb_cc) {
                        /* some to read, wake-up */
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-                       struct socket *so;
-
-                       so = SCTP_INP_SO(stcb->sctp_ep);
-                       atomic_add_int(&stcb->asoc.refcnt, 1);
-                       SCTP_TCB_UNLOCK(stcb);
-                       SCTP_SOCKET_LOCK(so, 1);
-                       SCTP_TCB_LOCK(stcb);
-                       atomic_subtract_int(&stcb->asoc.refcnt, 1);
-                       if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
-                               /* assoc was freed while we were unlocked */
-                               SCTP_SOCKET_UNLOCK(so, 1);
-                               return (0);
-                       }
-#endif
                        sctp_sorwakeup(stcb->sctp_ep, stcb->sctp_socket);
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-                       SCTP_SOCKET_UNLOCK(so, 1);
-#endif
                }
                /* now is it in the mapping array of what we have accepted? */
                if (chk_type == SCTP_DATA) {
@@ -4182,32 +4147,12 @@ sctp_express_handle_sack(struct sctp_tcb *stcb, uint32
        }
        /* sa_ignore NO_NULL_CHK */
        if (stcb->sctp_socket) {
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-               struct socket *so;
-
-#endif
                SOCKBUF_LOCK(&stcb->sctp_socket->so_snd);
                if (SCTP_BASE_SYSCTL(sctp_logging_level) & 
SCTP_WAKE_LOGGING_ENABLE) {
                        /* sa_ignore NO_NULL_CHK */
                        sctp_wakeup_log(stcb, 1, SCTP_WAKESND_FROM_SACK);
                }
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-               so = SCTP_INP_SO(stcb->sctp_ep);
-               atomic_add_int(&stcb->asoc.refcnt, 1);
-               SCTP_TCB_UNLOCK(stcb);
-               SCTP_SOCKET_LOCK(so, 1);
-               SCTP_TCB_LOCK(stcb);
-               atomic_subtract_int(&stcb->asoc.refcnt, 1);
-               if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
-                       /* assoc was freed while we were unlocked */
-                       SCTP_SOCKET_UNLOCK(so, 1);
-                       return;
-               }
-#endif
                sctp_sowwakeup_locked(stcb->sctp_ep, stcb->sctp_socket);
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-               SCTP_SOCKET_UNLOCK(so, 1);
-#endif
        } else {
                if (SCTP_BASE_SYSCTL(sctp_logging_level) & 
SCTP_WAKE_LOGGING_ENABLE) {
                        sctp_wakeup_log(stcb, 1, SCTP_NOWAKE_FROM_SACK);
@@ -4894,31 +4839,11 @@ hopeless_peer:
 
        /* sa_ignore NO_NULL_CHK */
        if ((wake_him) && (stcb->sctp_socket)) {
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-               struct socket *so;
-
-#endif
                SOCKBUF_LOCK(&stcb->sctp_socket->so_snd);
                if (SCTP_BASE_SYSCTL(sctp_logging_level) & 
SCTP_WAKE_LOGGING_ENABLE) {
                        sctp_wakeup_log(stcb, wake_him, SCTP_WAKESND_FROM_SACK);
                }
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-               so = SCTP_INP_SO(stcb->sctp_ep);
-               atomic_add_int(&stcb->asoc.refcnt, 1);
-               SCTP_TCB_UNLOCK(stcb);
-               SCTP_SOCKET_LOCK(so, 1);
-               SCTP_TCB_LOCK(stcb);
-               atomic_subtract_int(&stcb->asoc.refcnt, 1);
-               if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
-                       /* assoc was freed while we were unlocked */
-                       SCTP_SOCKET_UNLOCK(so, 1);
-                       return;
-               }
-#endif
                sctp_sowwakeup_locked(stcb->sctp_ep, stcb->sctp_socket);
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-               SCTP_SOCKET_UNLOCK(so, 1);
-#endif
        } else {
                if (SCTP_BASE_SYSCTL(sctp_logging_level) & 
SCTP_WAKE_LOGGING_ENABLE) {
                        sctp_wakeup_log(stcb, wake_him, SCTP_NOWAKE_FROM_SACK);

Modified: head/sys/netinet/sctp_input.c
==============================================================================
--- head/sys/netinet/sctp_input.c       Sun Jun  7 13:53:23 2020        
(r361894)
+++ head/sys/netinet/sctp_input.c       Sun Jun  7 14:39:20 2020        
(r361895)
@@ -214,9 +214,7 @@ outnow:
 
 int
 sctp_is_there_unsent_data(struct sctp_tcb *stcb, int so_locked
-#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
     SCTP_UNUSED
-#endif
 )
 {
        int unsent_data;
@@ -788,9 +786,6 @@ static int
 sctp_handle_abort(struct sctp_abort_chunk *abort,
     struct sctp_tcb *stcb, struct sctp_nets *net)
 {
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-       struct socket *so;
-#endif
        uint16_t len;
        uint16_t error;
 
@@ -838,20 +833,9 @@ sctp_handle_abort(struct sctp_abort_chunk *abort,
 #ifdef SCTP_ASOCLOG_OF_TSNS
        sctp_print_out_track_log(stcb);
 #endif
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-       so = SCTP_INP_SO(stcb->sctp_ep);
-       atomic_add_int(&stcb->asoc.refcnt, 1);
-       SCTP_TCB_UNLOCK(stcb);
-       SCTP_SOCKET_LOCK(so, 1);
-       SCTP_TCB_LOCK(stcb);
-       atomic_subtract_int(&stcb->asoc.refcnt, 1);
-#endif
        SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_WAS_ABORTED);
        (void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC,
            SCTP_FROM_SCTP_INPUT + SCTP_LOC_8);
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-       SCTP_SOCKET_UNLOCK(so, 1);
-#endif
        SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_handle_abort: finished\n");
        return (1);
 }
@@ -892,9 +876,6 @@ sctp_handle_shutdown(struct sctp_shutdown_chunk *cp,
        struct sctp_association *asoc;
        int some_on_streamwheel;
        int old_state;
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-       struct socket *so;
-#endif
 
        SCTPDBG(SCTP_DEBUG_INPUT2,
            "sctp_handle_shutdown: handling SHUTDOWN\n");
@@ -943,25 +924,9 @@ sctp_handle_shutdown(struct sctp_shutdown_chunk *cp,
                asoc->control_pdapi->pdapi_aborted = 1;
                asoc->control_pdapi = NULL;
                SCTP_INP_READ_UNLOCK(stcb->sctp_ep);
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-               so = SCTP_INP_SO(stcb->sctp_ep);
-               atomic_add_int(&stcb->asoc.refcnt, 1);
-               SCTP_TCB_UNLOCK(stcb);
-               SCTP_SOCKET_LOCK(so, 1);
-               SCTP_TCB_LOCK(stcb);
-               atomic_subtract_int(&stcb->asoc.refcnt, 1);
-               if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
-                       /* assoc was freed while we were unlocked */
-                       SCTP_SOCKET_UNLOCK(so, 1);
-                       return;
-               }
-#endif
                if (stcb->sctp_socket) {
                        sctp_sorwakeup(stcb->sctp_ep, stcb->sctp_socket);
                }
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-               SCTP_SOCKET_UNLOCK(so, 1);
-#endif
        }
        /* goto SHUTDOWN_RECEIVED state to block new requests */
        if (stcb->sctp_socket) {
@@ -1021,11 +986,7 @@ sctp_handle_shutdown_ack(struct sctp_shutdown_ack_chun
     struct sctp_nets *net)
 {
        struct sctp_association *asoc;
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-       struct socket *so;
 
-       so = SCTP_INP_SO(stcb->sctp_ep);
-#endif
        SCTPDBG(SCTP_DEBUG_INPUT2,
            "sctp_handle_shutdown_ack: handling SHUTDOWN ACK\n");
        if (stcb == NULL)
@@ -1055,22 +1016,7 @@ sctp_handle_shutdown_ack(struct sctp_shutdown_ack_chun
                asoc->control_pdapi->pdapi_aborted = 1;
                asoc->control_pdapi = NULL;
                SCTP_INP_READ_UNLOCK(stcb->sctp_ep);
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-               atomic_add_int(&stcb->asoc.refcnt, 1);
-               SCTP_TCB_UNLOCK(stcb);
-               SCTP_SOCKET_LOCK(so, 1);
-               SCTP_TCB_LOCK(stcb);
-               atomic_subtract_int(&stcb->asoc.refcnt, 1);
-               if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
-                       /* assoc was freed while we were unlocked */
-                       SCTP_SOCKET_UNLOCK(so, 1);
-                       return;
-               }
-#endif
                sctp_sorwakeup(stcb->sctp_ep, stcb->sctp_socket);
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-               SCTP_SOCKET_UNLOCK(so, 1);
-#endif
        }
 #ifdef INVARIANTS
        if (!TAILQ_EMPTY(&asoc->send_queue) ||
@@ -1094,18 +1040,8 @@ sctp_handle_shutdown_ack(struct sctp_shutdown_ack_chun
        }
        SCTP_STAT_INCR_COUNTER32(sctps_shutdown);
        /* free the TCB but first save off the ep */
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-       atomic_add_int(&stcb->asoc.refcnt, 1);
-       SCTP_TCB_UNLOCK(stcb);
-       SCTP_SOCKET_LOCK(so, 1);
-       SCTP_TCB_LOCK(stcb);
-       atomic_subtract_int(&stcb->asoc.refcnt, 1);
-#endif
        (void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC,
            SCTP_FROM_SCTP_INPUT + SCTP_LOC_11);
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-       SCTP_SOCKET_UNLOCK(so, 1);
-#endif
 }
 
 static void
@@ -1176,9 +1112,6 @@ sctp_handle_error(struct sctp_chunkhdr *ch,
        struct sctp_association *asoc;
        uint32_t remaining_length, adjust;
        uint16_t code, cause_code, cause_length;
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-       struct socket *so;
-#endif
 
        /* parse through all of the errors and process */
        asoc = &stcb->asoc;
@@ -1252,19 +1185,8 @@ sctp_handle_error(struct sctp_chunkhdr *ch,
                                    asoc->max_init_times) {
                                        sctp_abort_notification(stcb, 0, 0, 
NULL, SCTP_SO_NOT_LOCKED);
                                        /* now free the asoc */
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-                                       so = SCTP_INP_SO(stcb->sctp_ep);
-                                       atomic_add_int(&stcb->asoc.refcnt, 1);
-                                       SCTP_TCB_UNLOCK(stcb);
-                                       SCTP_SOCKET_LOCK(so, 1);
-                                       SCTP_TCB_LOCK(stcb);
-                                       atomic_subtract_int(&stcb->asoc.refcnt, 
1);
-#endif
                                        (void)sctp_free_assoc(stcb->sctp_ep, 
stcb, SCTP_NORMAL_PROC,
                                            SCTP_FROM_SCTP_INPUT + SCTP_LOC_12);
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-                                       SCTP_SOCKET_UNLOCK(so, 1);
-#endif
                                        return (-1);
                                }
                                /* blast back to INIT state */
@@ -1648,9 +1570,6 @@ sctp_process_cookie_existing(struct mbuf *m, int iphle
                        if (((stcb->sctp_ep->sctp_flags & 
SCTP_PCB_FLAGS_TCPTYPE) ||
                            (stcb->sctp_ep->sctp_flags & 
SCTP_PCB_FLAGS_IN_TCPPOOL)) &&
                            (!SCTP_IS_LISTENING(inp))) {
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-                               struct socket *so;
-#endif
                                /*
                                 * Here is where collision would go if we
                                 * did a connect() and instead got a
@@ -1659,22 +1578,7 @@ sctp_process_cookie_existing(struct mbuf *m, int iphle
                                 */
                                stcb->sctp_ep->sctp_flags |=
                                    SCTP_PCB_FLAGS_CONNECTED;
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-                               so = SCTP_INP_SO(stcb->sctp_ep);
-                               atomic_add_int(&stcb->asoc.refcnt, 1);
-                               SCTP_TCB_UNLOCK(stcb);
-                               SCTP_SOCKET_LOCK(so, 1);
-                               SCTP_TCB_LOCK(stcb);
-                               atomic_add_int(&stcb->asoc.refcnt, -1);
-                               if (stcb->asoc.state & 
SCTP_STATE_CLOSED_SOCKET) {
-                                       SCTP_SOCKET_UNLOCK(so, 1);
-                                       return (NULL);
-                               }
-#endif
                                soisconnected(stcb->sctp_socket);
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-                               SCTP_SOCKET_UNLOCK(so, 1);
-#endif
                        }
                        /* notify upper layer */
                        *notification = SCTP_NOTIFY_ASSOC_UP;
@@ -1849,27 +1753,9 @@ sctp_process_cookie_existing(struct mbuf *m, int iphle
                        if (((stcb->sctp_ep->sctp_flags & 
SCTP_PCB_FLAGS_TCPTYPE) ||
                            (stcb->sctp_ep->sctp_flags & 
SCTP_PCB_FLAGS_IN_TCPPOOL)) &&
                            (!SCTP_IS_LISTENING(inp))) {
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-                               struct socket *so;
-#endif
                                stcb->sctp_ep->sctp_flags |=
                                    SCTP_PCB_FLAGS_CONNECTED;
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-                               so = SCTP_INP_SO(stcb->sctp_ep);
-                               atomic_add_int(&stcb->asoc.refcnt, 1);
-                               SCTP_TCB_UNLOCK(stcb);
-                               SCTP_SOCKET_LOCK(so, 1);
-                               SCTP_TCB_LOCK(stcb);
-                               atomic_add_int(&stcb->asoc.refcnt, -1);
-                               if (stcb->asoc.state & 
SCTP_STATE_CLOSED_SOCKET) {
-                                       SCTP_SOCKET_UNLOCK(so, 1);
-                                       return (NULL);
-                               }
-#endif
                                soisconnected(stcb->sctp_socket);
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-                               SCTP_SOCKET_UNLOCK(so, 1);
-#endif
                        }
                        if (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)
                                SCTP_STAT_INCR_COUNTER32(sctps_activeestab);
@@ -1910,9 +1796,6 @@ sctp_process_cookie_existing(struct mbuf *m, int iphle
            cookie->tie_tag_peer_vtag == asoc->peer_vtag_nonce &&
            cookie->tie_tag_peer_vtag != 0) {
                struct sctpasochead *head;
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-               struct socket *so;
-#endif
 
                if (asoc->peer_supports_nat) {
                        /*
@@ -1980,10 +1863,6 @@ sctp_process_cookie_existing(struct mbuf *m, int iphle
                            asoc->mapping_array_size);
                }
                SCTP_TCB_UNLOCK(stcb);
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-               so = SCTP_INP_SO(stcb->sctp_ep);
-               SCTP_SOCKET_LOCK(so, 1);
-#endif
                SCTP_INP_INFO_WLOCK();
                SCTP_INP_WLOCK(stcb->sctp_ep);
                SCTP_TCB_LOCK(stcb);
@@ -2026,9 +1905,6 @@ sctp_process_cookie_existing(struct mbuf *m, int iphle
                SCTP_TCB_SEND_UNLOCK(stcb);
                SCTP_INP_WUNLOCK(stcb->sctp_ep);
                SCTP_INP_INFO_WUNLOCK();
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-               SCTP_SOCKET_UNLOCK(so, 1);
-#endif
                asoc->total_flight = 0;
                asoc->total_flight_count = 0;
                /* process the INIT info (peer's info) */
@@ -2095,12 +1971,7 @@ sctp_process_cookie_new(struct mbuf *m, int iphlen, in
        int retval;
        int error = 0;
        uint8_t auth_chunk_buf[SCTP_CHUNK_BUFFER_SIZE];
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-       struct socket *so;
 
-       so = SCTP_INP_SO(inp);
-#endif
-
        /*
         * find and validate the INIT chunk in the cookie (peer's info) the
         * INIT should start after the cookie-echo header struct (chunk
@@ -2199,18 +2070,8 @@ sctp_process_cookie_new(struct mbuf *m, int iphlen, in
                    src, dst, sh, op_err,
                    mflowtype, mflowid,
                    vrf_id, port);
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-               atomic_add_int(&stcb->asoc.refcnt, 1);
-               SCTP_TCB_UNLOCK(stcb);
-               SCTP_SOCKET_LOCK(so, 1);
-               SCTP_TCB_LOCK(stcb);
-               atomic_subtract_int(&stcb->asoc.refcnt, 1);
-#endif
                (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
                    SCTP_FROM_SCTP_INPUT + SCTP_LOC_18);
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-               SCTP_SOCKET_UNLOCK(so, 1);
-#endif
                return (NULL);
        }
        /* process the INIT-ACK info (my info) */
@@ -2231,36 +2092,16 @@ sctp_process_cookie_new(struct mbuf *m, int iphlen, in
        else
                retval = 0;
        if (retval < 0) {
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-               atomic_add_int(&stcb->asoc.refcnt, 1);
-               SCTP_TCB_UNLOCK(stcb);
-               SCTP_SOCKET_LOCK(so, 1);
-               SCTP_TCB_LOCK(stcb);
-               atomic_subtract_int(&stcb->asoc.refcnt, 1);
-#endif
                (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
                    SCTP_FROM_SCTP_INPUT + SCTP_LOC_19);
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-               SCTP_SOCKET_UNLOCK(so, 1);
-#endif
                return (NULL);
        }
        /* load all addresses */
        if (sctp_load_addresses_from_init(stcb, m,
            init_offset + sizeof(struct sctp_init_chunk), initack_offset,
            src, dst, init_src, port)) {
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-               atomic_add_int(&stcb->asoc.refcnt, 1);
-               SCTP_TCB_UNLOCK(stcb);
-               SCTP_SOCKET_LOCK(so, 1);
-               SCTP_TCB_LOCK(stcb);
-               atomic_subtract_int(&stcb->asoc.refcnt, 1);
-#endif
                (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
                    SCTP_FROM_SCTP_INPUT + SCTP_LOC_20);
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-               SCTP_SOCKET_UNLOCK(so, 1);
-#endif
                return (NULL);
        }
        /*
@@ -2282,18 +2123,8 @@ sctp_process_cookie_new(struct mbuf *m, int iphlen, in
                        /* auth HMAC failed, dump the assoc and packet */
                        SCTPDBG(SCTP_DEBUG_AUTH1,
                            "COOKIE-ECHO: AUTH failed\n");
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-                       atomic_add_int(&stcb->asoc.refcnt, 1);
-                       SCTP_TCB_UNLOCK(stcb);
-                       SCTP_SOCKET_LOCK(so, 1);
-                       SCTP_TCB_LOCK(stcb);
-                       atomic_subtract_int(&stcb->asoc.refcnt, 1);
-#endif
                        (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
                            SCTP_FROM_SCTP_INPUT + SCTP_LOC_21);
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-                       SCTP_SOCKET_UNLOCK(so, 1);
-#endif
                        return (NULL);
                } else {
                        /* remaining chunks checked... good to go */
@@ -2333,18 +2164,8 @@ sctp_process_cookie_new(struct mbuf *m, int iphlen, in
                break;
 #endif
        default:
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-               atomic_add_int(&stcb->asoc.refcnt, 1);
-               SCTP_TCB_UNLOCK(stcb);
-               SCTP_SOCKET_LOCK(so, 1);
-               SCTP_TCB_LOCK(stcb);
-               atomic_subtract_int(&stcb->asoc.refcnt, 1);
-#endif
                (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
                    SCTP_FROM_SCTP_INPUT + SCTP_LOC_22);
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-               SCTP_SOCKET_UNLOCK(so, 1);
-#endif
                return (NULL);
        }
 
@@ -2373,21 +2194,7 @@ sctp_process_cookie_new(struct mbuf *m, int iphlen, in
                 * a bit of protection is worth having..
                 */
                stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-               atomic_add_int(&stcb->asoc.refcnt, 1);
-               SCTP_TCB_UNLOCK(stcb);
-               SCTP_SOCKET_LOCK(so, 1);
-               SCTP_TCB_LOCK(stcb);
-               atomic_subtract_int(&stcb->asoc.refcnt, 1);
-               if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
-                       SCTP_SOCKET_UNLOCK(so, 1);
-                       return (NULL);
-               }
-#endif
                soisconnected(stcb->sctp_socket);
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-               SCTP_SOCKET_UNLOCK(so, 1);
-#endif
        } else if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
            (SCTP_IS_LISTENING(inp))) {
                /*
@@ -2807,9 +2614,7 @@ sctp_handle_cookie_echo(struct mbuf *m, int iphlen, in
 
                        if (so == NULL) {
                                struct mbuf *op_err;
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-                               struct socket *pcb_so;
-#endif
+
                                /* Too many sockets */
                                SCTPDBG(SCTP_DEBUG_INPUT1, "process_cookie_new: 
no room for another socket!\n");
                                op_err = 
sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
@@ -2817,19 +2622,8 @@ sctp_handle_cookie_echo(struct mbuf *m, int iphlen, in
                                    src, dst, sh, op_err,
                                    mflowtype, mflowid,
                                    vrf_id, port);
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-                               pcb_so = SCTP_INP_SO(*inp_p);
-                               atomic_add_int(&(*stcb)->asoc.refcnt, 1);
-                               SCTP_TCB_UNLOCK((*stcb));
-                               SCTP_SOCKET_LOCK(pcb_so, 1);
-                               SCTP_TCB_LOCK((*stcb));
-                               atomic_subtract_int(&(*stcb)->asoc.refcnt, 1);
-#endif
                                (void)sctp_free_assoc(*inp_p, *stcb, 
SCTP_NORMAL_PROC,
                                    SCTP_FROM_SCTP_INPUT + SCTP_LOC_23);
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-                               SCTP_SOCKET_UNLOCK(pcb_so, 1);
-#endif
                                return (NULL);
                        }
                        inp = (struct sctp_inpcb *)so->so_pcb;
@@ -2926,17 +2720,7 @@ sctp_handle_cookie_echo(struct mbuf *m, int iphlen, in
                         * Pull it from the incomplete queue and wake the
                         * guy
                         */
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-                       atomic_add_int(&(*stcb)->asoc.refcnt, 1);
-                       SCTP_TCB_UNLOCK((*stcb));
-                       SCTP_SOCKET_LOCK(so, 1);
-#endif
                        soisconnected(so);
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-                       SCTP_TCB_LOCK((*stcb));
-                       atomic_subtract_int(&(*stcb)->asoc.refcnt, 1);
-                       SCTP_SOCKET_UNLOCK(so, 1);
-#endif
                        return (m);
                }
        }
@@ -2996,25 +2780,10 @@ sctp_handle_cookie_ack(struct sctp_cookie_ack_chunk *c
                sctp_ulp_notify(SCTP_NOTIFY_ASSOC_UP, stcb, 0, NULL, 
SCTP_SO_NOT_LOCKED);
                if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
                    (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-                       struct socket *so;
-
-#endif
                        stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-                       so = SCTP_INP_SO(stcb->sctp_ep);
-                       atomic_add_int(&stcb->asoc.refcnt, 1);
-                       SCTP_TCB_UNLOCK(stcb);
-                       SCTP_SOCKET_LOCK(so, 1);
-                       SCTP_TCB_LOCK(stcb);
-                       atomic_subtract_int(&stcb->asoc.refcnt, 1);
-#endif
                        if ((stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) == 0) 
{
                                soisconnected(stcb->sctp_socket);
                        }
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-                       SCTP_SOCKET_UNLOCK(so, 1);
-#endif
                }
                /*
                 * since we did not send a HB make sure we don't double
@@ -3238,9 +3007,6 @@ static void
 sctp_handle_shutdown_complete(struct sctp_shutdown_complete_chunk *cp 
SCTP_UNUSED,
     struct sctp_tcb *stcb, struct sctp_nets *net)
 {
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-       struct socket *so;
-#endif
 
        SCTPDBG(SCTP_DEBUG_INPUT2,
            "sctp_handle_shutdown_complete: handling SHUTDOWN-COMPLETE\n");
@@ -3273,19 +3039,8 @@ sctp_handle_shutdown_complete(struct sctp_shutdown_com
        /* free the TCB */
        SCTPDBG(SCTP_DEBUG_INPUT2,
            "sctp_handle_shutdown_complete: calls free-asoc\n");
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-       so = SCTP_INP_SO(stcb->sctp_ep);
-       atomic_add_int(&stcb->asoc.refcnt, 1);
-       SCTP_TCB_UNLOCK(stcb);
-       SCTP_SOCKET_LOCK(so, 1);
-       SCTP_TCB_LOCK(stcb);
-       atomic_subtract_int(&stcb->asoc.refcnt, 1);
-#endif
        (void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC,
            SCTP_FROM_SCTP_INPUT + SCTP_LOC_25);
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-       SCTP_SOCKET_UNLOCK(so, 1);
-#endif
        return;
 }
 
@@ -4570,9 +4325,6 @@ sctp_process_control(struct mbuf *m, int iphlen, int *
        uint32_t auth_offset = 0, auth_len = 0;
        int auth_skipped = 0;
        int asconf_cnt = 0;
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-       struct socket *so;
-#endif
 
        SCTPDBG(SCTP_DEBUG_INPUT1, "sctp_process_control: iphlen=%u, offset=%u, 
length=%u stcb:%p\n",
            iphlen, *offset, length, (void *)stcb);
@@ -4881,19 +4633,8 @@ process_control_chunks:
                                } else {
                                        *offset = length;
                                        if (stcb != NULL) {
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-                                               so = SCTP_INP_SO(inp);
-                                               
atomic_add_int(&stcb->asoc.refcnt, 1);
-                                               SCTP_TCB_UNLOCK(stcb);
-                                               SCTP_SOCKET_LOCK(so, 1);
-                                               SCTP_TCB_LOCK(stcb);
-                                               
atomic_subtract_int(&stcb->asoc.refcnt, 1);
-#endif
                                                (void)sctp_free_assoc(inp, 
stcb, SCTP_NORMAL_PROC,
                                                    SCTP_FROM_SCTP_INPUT + 
SCTP_LOC_29);
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-                                               SCTP_SOCKET_UNLOCK(so, 1);
-#endif
                                        }
                                        return (NULL);
                                }
@@ -5245,19 +4986,8 @@ process_control_chunks:
                                if ((stcb) && 
(stcb->asoc.total_output_queue_size)) {
                                        ;
                                } else if (stcb) {
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-                                       so = SCTP_INP_SO(inp);
-                                       atomic_add_int(&stcb->asoc.refcnt, 1);
-                                       SCTP_TCB_UNLOCK(stcb);
-                                       SCTP_SOCKET_LOCK(so, 1);
-                                       SCTP_TCB_LOCK(stcb);
-                                       atomic_subtract_int(&stcb->asoc.refcnt, 
1);
-#endif
                                        (void)sctp_free_assoc(inp, stcb, 
SCTP_NORMAL_PROC,
                                            SCTP_FROM_SCTP_INPUT + SCTP_LOC_30);
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-                                       SCTP_SOCKET_UNLOCK(so, 1);
-#endif
                                        *offset = length;
                                        return (NULL);
                                }
@@ -5360,19 +5090,8 @@ process_control_chunks:
                                *fwd_tsn_seen = 1;
                                if (inp->sctp_flags & 
SCTP_PCB_FLAGS_SOCKET_GONE) {
                                        /* We are not interested anymore */
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-                                       so = SCTP_INP_SO(inp);
-                                       atomic_add_int(&stcb->asoc.refcnt, 1);
-                                       SCTP_TCB_UNLOCK(stcb);
-                                       SCTP_SOCKET_LOCK(so, 1);
-                                       SCTP_TCB_LOCK(stcb);
-                                       atomic_subtract_int(&stcb->asoc.refcnt, 
1);
-#endif
                                        (void)sctp_free_assoc(inp, stcb, 
SCTP_NORMAL_PROC,
                                            SCTP_FROM_SCTP_INPUT + SCTP_LOC_31);
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-                                       SCTP_SOCKET_UNLOCK(so, 1);
-#endif
                                        *offset = length;
                                        return (NULL);
                                }

Modified: head/sys/netinet/sctp_output.c
==============================================================================
--- head/sys/netinet/sctp_output.c      Sun Jun  7 13:53:23 2020        
(r361894)
+++ head/sys/netinet/sctp_output.c      Sun Jun  7 14:39:20 2020        
(r361895)
@@ -3990,11 +3990,7 @@ sctp_lowlevel_chunk_output(struct sctp_inpcb *inp,
     uint16_t port,
     union sctp_sockstore *over_addr,
     uint8_t mflowtype, uint32_t mflowid,
-#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
     int so_locked SCTP_UNUSED
-#else
-    int so_locked
-#endif
 )
 {
 /* nofragment_flag to tell if IP_DF should be set (IPv4 only) */
@@ -4024,9 +4020,6 @@ sctp_lowlevel_chunk_output(struct sctp_inpcb *inp,
        struct udphdr *udp = NULL;
 #endif
        uint8_t tos_value;
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-       struct socket *so = NULL;
-#endif
 
        if ((net) && (net->dest_state & SCTP_ADDR_OUT_OF_SCOPE)) {
                SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, 
SCTP_FROM_SCTP_OUTPUT, EFAULT);
@@ -4247,23 +4240,8 @@ sctp_lowlevel_chunk_output(struct sctp_inpcb *inp,
                                sctp_packet_log(o_pak);
 #endif
                        /* send it out.  table id is taken from stcb */
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-                       if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && 
(so_locked)) {
-                               so = SCTP_INP_SO(inp);
-                               SCTP_SOCKET_UNLOCK(so, 0);
-                       }
-#endif
                        SCTP_PROBE5(send, NULL, stcb, ip, stcb, sctphdr);
                        SCTP_IP_OUTPUT(ret, o_pak, ro, stcb, vrf_id);
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-                       if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && 
(so_locked)) {
-                               atomic_add_int(&stcb->asoc.refcnt, 1);
-                               SCTP_TCB_UNLOCK(stcb);
-                               SCTP_SOCKET_LOCK(so, 0);
-                               SCTP_TCB_LOCK(stcb);
-                               atomic_subtract_int(&stcb->asoc.refcnt, 1);
-                       }
-#endif
                        if (port) {
                                UDPSTAT_INC(udps_opackets);
                        }
@@ -4582,27 +4560,12 @@ sctp_lowlevel_chunk_output(struct sctp_inpcb *inp,
                                SCTP_STAT_INCR(sctps_sendhwcrc);
                        }
                        /* send it out. table id is taken from stcb */
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-                       if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && 
(so_locked)) {
-                               so = SCTP_INP_SO(inp);
-                               SCTP_SOCKET_UNLOCK(so, 0);
-                       }
-#endif
 #ifdef SCTP_PACKET_LOGGING
                        if (SCTP_BASE_SYSCTL(sctp_logging_level) & 
SCTP_LAST_PACKET_TRACING)
                                sctp_packet_log(o_pak);
 #endif
                        SCTP_PROBE5(send, NULL, stcb, ip6h, stcb, sctphdr);
                        SCTP_IP6_OUTPUT(ret, o_pak, (struct route_in6 *)ro, 
&ifp, stcb, vrf_id);
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-                       if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && 
(so_locked)) {
-                               atomic_add_int(&stcb->asoc.refcnt, 1);
-                               SCTP_TCB_UNLOCK(stcb);
-                               SCTP_SOCKET_LOCK(so, 0);
-                               SCTP_TCB_LOCK(stcb);
-                               atomic_subtract_int(&stcb->asoc.refcnt, 1);
-                       }
-#endif
                        if (net) {
                                /* for link local this must be done */
                                sin6->sin6_scope_id = prev_scope;
@@ -4674,9 +4637,7 @@ sctp_lowlevel_chunk_output(struct sctp_inpcb *inp,
 
 void
 sctp_send_initiate(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int so_locked
-#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
     SCTP_UNUSED
-#endif
 )
 {
        struct mbuf *m, *m_last;
@@ -6612,9 +6573,7 @@ sctp_med_chunk_output(struct sctp_inpcb *inp,
     int *reason_code,
     int control_only, int from_where,
     struct timeval *now, int *now_filled, int frag_point, int so_locked
-#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
     SCTP_UNUSED
-#endif
 );
 
 static void
@@ -7076,9 +7035,7 @@ all_done:
 
 static void
 sctp_clean_up_ctl(struct sctp_tcb *stcb, struct sctp_association *asoc, int 
so_locked
-#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
     SCTP_UNUSED
-#endif
 )
 {
        struct sctp_tmit_chunk *chk, *nchk;
@@ -7185,9 +7142,7 @@ sctp_move_to_outqueue(struct sctp_tcb *stcb,
     int eeor_mode,
     int *bail,
     int so_locked
-#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
     SCTP_UNUSED
-#endif
 )
 {
        /* Move from the stream to the send_queue keeping track of the total */
@@ -7716,9 +7671,7 @@ out_of:
 static void
 sctp_fill_outqueue(struct sctp_tcb *stcb,
     struct sctp_nets *net, int frag_point, int eeor_mode, int *quit_now, int 
so_locked
-#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
     SCTP_UNUSED
-#endif
 )
 {
        struct sctp_association *asoc;
@@ -7839,9 +7792,7 @@ sctp_med_chunk_output(struct sctp_inpcb *inp,
     int *reason_code,
     int control_only, int from_where,
     struct timeval *now, int *now_filled, int frag_point, int so_locked
-#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
     SCTP_UNUSED
-#endif
 )
 {
        /**
@@ -9458,9 +9409,7 @@ sctp_chunk_retransmission(struct sctp_inpcb *inp,
     struct sctp_tcb *stcb,
     struct sctp_association *asoc,
     int *cnt_out, struct timeval *now, int *now_filled, int *fr_done, int 
so_locked
-#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
     SCTP_UNUSED
-#endif
 )
 {
        /*-
@@ -10011,9 +9960,7 @@ sctp_chunk_output(struct sctp_inpcb *inp,
     struct sctp_tcb *stcb,
     int from_where,
     int so_locked
-#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
     SCTP_UNUSED
-#endif
 )
 {
        /*-
@@ -10532,9 +10479,7 @@ sctp_fill_in_rest:
 
 void
 sctp_send_sack(struct sctp_tcb *stcb, int so_locked
-#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
     SCTP_UNUSED
-#endif
 )
 {
        /*-
@@ -10930,9 +10875,7 @@ sctp_send_sack(struct sctp_tcb *stcb, int so_locked
 
 void
 sctp_send_abort_tcb(struct sctp_tcb *stcb, struct mbuf *operr, int so_locked
-#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
     SCTP_UNUSED
-#endif
 )
 {
        struct mbuf *m_abort, *m, *m_last;
@@ -11350,9 +11293,7 @@ sctp_send_shutdown_complete2(struct sockaddr *src, str
 
 void
 sctp_send_hb(struct sctp_tcb *stcb, struct sctp_nets *net, int so_locked
-#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
     SCTP_UNUSED
-#endif
 )
 {
        struct sctp_tmit_chunk *chk;

Modified: head/sys/netinet/sctp_output.h
==============================================================================
--- head/sys/netinet/sctp_output.h      Sun Jun  7 13:53:23 2020        
(r361894)
+++ head/sys/netinet/sctp_output.h      Sun Jun  7 14:39:20 2020        
(r361895)
@@ -76,9 +76,7 @@ int
 
 void
 sctp_send_initiate(struct sctp_inpcb *, struct sctp_tcb *, int
-#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
     SCTP_UNUSED
-#endif
 );
 
 void
@@ -148,15 +146,11 @@ sctp_output(struct sctp_inpcb *, struct mbuf *, struct
 
 void
 sctp_chunk_output(struct sctp_inpcb *, struct sctp_tcb *, int, int
-#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
     SCTP_UNUSED
-#endif
 );
 void
 sctp_send_abort_tcb(struct sctp_tcb *, struct mbuf *, int
-#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
     SCTP_UNUSED
-#endif
 );
 
 void send_forward_tsn(struct sctp_tcb *, struct sctp_association *);

Modified: head/sys/netinet/sctp_sysctl.c
==============================================================================
--- head/sys/netinet/sctp_sysctl.c      Sun Jun  7 13:53:23 2020        
(r361894)
+++ head/sys/netinet/sctp_sysctl.c      Sun Jun  7 14:39:20 2020        
(r361895)
@@ -130,9 +130,6 @@ sctp_init_sysctls()
 #if defined(SCTP_DEBUG)
        SCTP_BASE_SYSCTL(sctp_debug_on) = SCTPCTL_DEBUG_DEFAULT;
 #endif
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-       SCTP_BASE_SYSCTL(sctp_output_unlocked) = 
SCTPCTL_OUTPUT_UNLOCKED_DEFAULT;
-#endif
 }
 
 
@@ -958,9 +955,6 @@ SCTP_UINT_SYSCTL(sendall_limit, sctp_sendall_limit, SC
 SCTP_UINT_SYSCTL(diag_info_code, sctp_diag_info_code, SCTPCTL_DIAG_INFO_CODE)
 #ifdef SCTP_DEBUG
 SCTP_UINT_SYSCTL(debug, sctp_debug_on, SCTPCTL_DEBUG)
-#endif
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-SCTP_UINT_SYSCTL(output_unlocked, sctp_output_unlocked, 
SCTPCTL_OUTPUT_UNLOCKED)
 #endif
 SYSCTL_PROC(_net_inet_sctp, OID_AUTO, stats,
     CTLFLAG_VNET | CTLTYPE_STRUCT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,

Modified: head/sys/netinet/sctp_sysctl.h
==============================================================================
--- head/sys/netinet/sctp_sysctl.h      Sun Jun  7 13:53:23 2020        
(r361894)
+++ head/sys/netinet/sctp_sysctl.h      Sun Jun  7 14:39:20 2020        
(r361895)
@@ -120,9 +120,6 @@ struct sctp_sysctl {
 #if defined(SCTP_DEBUG)
        uint32_t sctp_debug_on;
 #endif
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-       uint32_t sctp_output_unlocked;
-#endif
 };
 
 /*
@@ -559,12 +556,6 @@ struct sctp_sysctl {
 #endif
 
 
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-#define SCTPCTL_OUTPUT_UNLOCKED_DESC   "Unlock socket when sending packets 
down to IP"
-#define SCTPCTL_OUTPUT_UNLOCKED_MIN    0
-#define SCTPCTL_OUTPUT_UNLOCKED_MAX    1
-#define SCTPCTL_OUTPUT_UNLOCKED_DEFAULT        SCTPCTL_OUTPUT_UNLOCKED_MIN
-#endif
 
 
 #if defined(_KERNEL) || defined(__Userspace__)

Modified: head/sys/netinet/sctp_usrreq.c
==============================================================================
--- head/sys/netinet/sctp_usrreq.c      Sun Jun  7 13:53:23 2020        
(r361894)
+++ head/sys/netinet/sctp_usrreq.c      Sun Jun  7 14:39:20 2020        
(r361895)
@@ -162,9 +162,6 @@ sctp_notify(struct sctp_inpcb *inp,
     uint16_t ip_len,
     uint32_t next_mtu)
 {
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-       struct socket *so;
-#endif
        int timer_stopped;
 
        if (icmp_type != ICMP_UNREACH) {
@@ -194,20 +191,8 @@ sctp_notify(struct sctp_inpcb *inp,
            (icmp_code == ICMP_UNREACH_PORT)) {
                /* Treat it like an ABORT. */
                sctp_abort_notification(stcb, 1, 0, NULL, SCTP_SO_NOT_LOCKED);
-#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
-               so = SCTP_INP_SO(inp);
-               atomic_add_int(&stcb->asoc.refcnt, 1);
-               SCTP_TCB_UNLOCK(stcb);
-               SCTP_SOCKET_LOCK(so, 1);
-               SCTP_TCB_LOCK(stcb);
-               atomic_subtract_int(&stcb->asoc.refcnt, 1);

*** DIFF OUTPUT TRUNCATED AT 1000 LINES ***
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