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 #pragma ident "%Z%%M% %I% %E% SMI" /* SVr4.0 1.4 */
32
33 /*
34 * t_sndrel.c and t_sndreldata.c are very similar and contain common code.
35 * Any changes to either of them should be reviewed to see whether they
36 * are applicable to the other file.
37 */
38 #include "mt.h"
39 #include <errno.h>
40 #include <stropts.h>
41 #include <sys/stream.h>
42 #define _SUN_TPI_VERSION 2
43 #include <sys/tihdr.h>
44 #include <sys/timod.h>
45 #include <xti.h>
46 #include "tx.h"
47
48 int
_tx_sndrel(int fd,int api_semantics)49 _tx_sndrel(int fd, int api_semantics)
50 {
51 struct T_ordrel_req orreq;
52 struct strbuf ctlbuf;
53 struct _ti_user *tiptr;
54
55 if ((tiptr = _t_checkfd(fd, 0, api_semantics)) == NULL)
56 return (-1);
57 sig_mutex_lock(&tiptr->ti_lock);
58
59 if (tiptr->ti_servtype != T_COTS_ORD) {
60 t_errno = TNOTSUPPORT;
61 sig_mutex_unlock(&tiptr->ti_lock);
62 return (-1);
63 }
64
65 if (_T_IS_XTI(api_semantics)) {
66 /*
67 * User level state verification only done for XTI
68 * because doing for TLI may break existing applications
69 */
70 if (!(tiptr->ti_state == T_DATAXFER ||
71 tiptr->ti_state == T_INREL)) {
72 t_errno = TOUTSTATE;
73 sig_mutex_unlock(&tiptr->ti_lock);
74 return (-1);
75 }
76
77 if (_t_look_locked(fd, tiptr, 0,
78 api_semantics) == T_DISCONNECT) {
79 t_errno = TLOOK;
80 sig_mutex_unlock(&tiptr->ti_lock);
81 return (-1);
82 }
83
84 }
85
86 orreq.PRIM_type = T_ORDREL_REQ;
87 ctlbuf.maxlen = (int)sizeof (struct T_ordrel_req);
88 ctlbuf.len = (int)sizeof (struct T_ordrel_req);
89 ctlbuf.buf = (caddr_t)&orreq;
90
91 /*
92 * Calls to send data (write or putmsg) can potentially
93 * block, for MT case, we drop the lock and enable signals here
94 * and acquire it back
95 */
96 sig_mutex_unlock(&tiptr->ti_lock);
97 if (putmsg(fd, &ctlbuf, NULL, 0) < 0) {
98 if (errno == EAGAIN)
99 t_errno = TFLOW;
100 else
101 t_errno = TSYSERR;
102 return (-1);
103 }
104 sig_mutex_lock(&tiptr->ti_lock);
105 _T_TX_NEXTSTATE(T_SNDREL, tiptr,
106 "t_sndrel: invalid state on event T_SNDREL");
107 sig_mutex_unlock(&tiptr->ti_lock);
108 return (0);
109 }
110