sctp: use consistent names for locking macros

While there, add also a macro for an assert. Will be used shortly.
No functional change intended.

MFC after:	1 week

sys/netinet/sctp_lock_bsd.h

@@ -234,12 +234,12 @@ __FBSDID("$FreeBSD$");
  * or cookie secrets we lock the INP level.
  */
 
-#define SCTP_INP_READ_INIT(_inp) do {					\
+#define SCTP_INP_READ_LOCK_INIT(_inp) do {				\
 	mtx_init(&(_inp)->inp_rdata_mtx, "sctp-read", "inpr",		\
 	         MTX_DEF | MTX_DUPOK);					\
 } while (0)
 
-#define SCTP_INP_READ_DESTROY(_inp) do {				\
+#define SCTP_INP_READ_LOCK_DESTROY(_inp) do {				\
 	mtx_destroy(&(_inp)->inp_rdata_mtx);				\
 } while (0)
 
@@ -251,6 +251,11 @@ __FBSDID("$FreeBSD$");
 	mtx_unlock(&(_inp)->inp_rdata_mtx);				\
 } while (0)
 
+#define SCTP_INP_READ_LOCK_ASSERT(_inp) do {				\
+	KASSERT(mtx_owned(&(_inp)->inp_rdata_mtx),			\
+	        ("Don't own INP read queue lock"));			\
+} while (0)
+
 #define SCTP_INP_LOCK_INIT(_inp) do {					\
 	mtx_init(&(_inp)->inp_mtx, "sctp-inp", "inp",			\
 	         MTX_DEF | MTX_DUPOK);					\

sys/netinet/sctp_pcb.c

@@ -2501,7 +2501,7 @@ sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
 	SCTP_INP_LOCK_INIT(inp);
 	rw_init_flags(&inp->ip_inp.inp.inp_lock, "sctpinp",
 	    RW_RECURSE | RW_DUPOK);
-	SCTP_INP_READ_INIT(inp);
+	SCTP_INP_READ_LOCK_INIT(inp);
 	SCTP_ASOC_CREATE_LOCK_INIT(inp);
 	/* lock the new ep */
 	SCTP_INP_WLOCK(inp);
@@ -3678,7 +3678,7 @@ sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
 	crfree(inp->ip_inp.inp.inp_cred);
 	INP_LOCK_DESTROY(&inp->ip_inp.inp);
 	SCTP_INP_LOCK_DESTROY(inp);
-	SCTP_INP_READ_DESTROY(inp);
+	SCTP_INP_READ_LOCK_DESTROY(inp);
 	SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
 	SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
 	SCTP_DECR_EP_COUNT();