1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22
23 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
24 /* All Rights Reserved */
25
26 /*
27 * Copyright 2005 Sun Microsystems, Inc. All rights reserved.
28 * Use is subject to license terms.
29 */
30
31 /*
32 * t_sndrel.c and t_sndreldata.c are very similar and contain common code.
33 * Any changes to either of them should be reviewed to see whether they
34 * are applicable to the other file.
35 */
36 #include "mt.h"
37 #include <errno.h>
38 #include <stropts.h>
39 #include <sys/stream.h>
40 #define _SUN_TPI_VERSION 2
41 #include <sys/tihdr.h>
42 #include <sys/timod.h>
43 #include <xti.h>
44 #include "tx.h"
45
46 int
_tx_sndrel(int fd,int api_semantics)47 _tx_sndrel(int fd, int api_semantics)
48 {
49 struct T_ordrel_req orreq;
50 struct strbuf ctlbuf;
51 struct _ti_user *tiptr;
52
53 if ((tiptr = _t_checkfd(fd, 0, api_semantics)) == NULL)
54 return (-1);
55 sig_mutex_lock(&tiptr->ti_lock);
56
57 if (tiptr->ti_servtype != T_COTS_ORD) {
58 t_errno = TNOTSUPPORT;
59 sig_mutex_unlock(&tiptr->ti_lock);
60 return (-1);
61 }
62
63 if (_T_IS_XTI(api_semantics)) {
64 /*
65 * User level state verification only done for XTI
66 * because doing for TLI may break existing applications
67 */
68 if (!(tiptr->ti_state == T_DATAXFER ||
69 tiptr->ti_state == T_INREL)) {
70 t_errno = TOUTSTATE;
71 sig_mutex_unlock(&tiptr->ti_lock);
72 return (-1);
73 }
74
75 if (_t_look_locked(fd, tiptr, 0,
76 api_semantics) == T_DISCONNECT) {
77 t_errno = TLOOK;
78 sig_mutex_unlock(&tiptr->ti_lock);
79 return (-1);
80 }
81
82 }
83
84 orreq.PRIM_type = T_ORDREL_REQ;
85 ctlbuf.maxlen = (int)sizeof (struct T_ordrel_req);
86 ctlbuf.len = (int)sizeof (struct T_ordrel_req);
87 ctlbuf.buf = (caddr_t)&orreq;
88
89 /*
90 * Calls to send data (write or putmsg) can potentially
91 * block, for MT case, we drop the lock and enable signals here
92 * and acquire it back
93 */
94 sig_mutex_unlock(&tiptr->ti_lock);
95 if (putmsg(fd, &ctlbuf, NULL, 0) < 0) {
96 if (errno == EAGAIN)
97 t_errno = TFLOW;
98 else
99 t_errno = TSYSERR;
100 return (-1);
101 }
102 sig_mutex_lock(&tiptr->ti_lock);
103 _T_TX_NEXTSTATE(T_SNDREL, tiptr,
104 "t_sndrel: invalid state on event T_SNDREL");
105 sig_mutex_unlock(&tiptr->ti_lock);
106 return (0);
107 }
108