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 /*
24 * Copyright 2005 Sun Microsystems, Inc. All rights reserved.
25 * Use is subject to license terms.
26 */
27
28 /*
29 * t_sndrel.c and t_sndreldata.c are very similar and contain common code.
30 * Any changes to either of them should be reviewed to see whether they
31 * are applicable to the other file.
32 */
33 #include "mt.h"
34 #include <errno.h>
35 #include <stropts.h>
36 #include <sys/stream.h>
37 #define _SUN_TPI_VERSION 2
38 #include <sys/tihdr.h>
39 #include <sys/timod.h>
40 #include <xti.h>
41 #include <assert.h>
42 #include "tx.h"
43
44 int
_tx_sndreldata(int fd,struct t_discon * discon,int api_semantics)45 _tx_sndreldata(int fd, struct t_discon *discon, int api_semantics)
46 {
47 struct T_ordrel_req orreq;
48 struct strbuf ctlbuf;
49 struct _ti_user *tiptr;
50
51 assert(api_semantics == TX_XTI_XNS5_API);
52 if ((tiptr = _t_checkfd(fd, 0, api_semantics)) == NULL)
53 return (-1);
54 sig_mutex_lock(&tiptr->ti_lock);
55
56 if (tiptr->ti_servtype != T_COTS_ORD) {
57 t_errno = TNOTSUPPORT;
58 sig_mutex_unlock(&tiptr->ti_lock);
59 return (-1);
60 }
61
62 if (!(tiptr->ti_state == T_DATAXFER ||
63 tiptr->ti_state == T_INREL)) {
64 t_errno = TOUTSTATE;
65 sig_mutex_unlock(&tiptr->ti_lock);
66 return (-1);
67 }
68
69 if (_t_look_locked(fd, tiptr, 0,
70 api_semantics) == T_DISCONNECT) {
71 t_errno = TLOOK;
72 sig_mutex_unlock(&tiptr->ti_lock);
73 return (-1);
74 }
75
76 /*
77 * Someday there could be transport providers that support T_ORDRELDATA
78 * Until that happens, this function returns TBADDATA if user data
79 * was specified. If no user data is specified, this function
80 * behaves as t_sndrel()
81 * Note: Currently only mOSI ("minimal OSI") provider is specified
82 * to use T_ORDRELDATA so probability of needing it is minimal.
83 */
84
85 if (discon && discon->udata.len) {
86 t_errno = TBADDATA;
87 sig_mutex_unlock(&tiptr->ti_lock);
88 return (-1);
89 }
90
91 orreq.PRIM_type = T_ORDREL_REQ;
92 ctlbuf.maxlen = (int)sizeof (struct T_ordrel_req);
93 ctlbuf.len = (int)sizeof (struct T_ordrel_req);
94 ctlbuf.buf = (caddr_t)&orreq;
95
96 /*
97 * Calls to send data (write or putmsg) can potentially
98 * block, for MT case, we drop the lock and enable signals here
99 * and acquire it back
100 */
101 sig_mutex_unlock(&tiptr->ti_lock);
102 if (putmsg(fd, &ctlbuf, NULL, 0) < 0) {
103 if (errno == EAGAIN)
104 t_errno = TFLOW;
105 else
106 t_errno = TSYSERR;
107 return (-1);
108 }
109 sig_mutex_lock(&tiptr->ti_lock);
110 _T_TX_NEXTSTATE(T_SNDREL, tiptr,
111 "t_sndreldata: invalid state on event T_SNDREL");
112 sig_mutex_unlock(&tiptr->ti_lock);
113 return (0);
114 }
115