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 2006 Sun Microsystems, Inc. All rights reserved.
28 * Use is subject to license terms.
29 */
30
31 #include "mt.h"
32 #include <stdlib.h>
33 #include <errno.h>
34 #include <unistd.h>
35 #include <sys/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 <signal.h>
42 #include <syslog.h>
43 #include "tx.h"
44
45
46 int
_tx_unbind(int fd,int api_semantics)47 _tx_unbind(int fd, int api_semantics)
48 {
49 struct _ti_user *tiptr;
50 sigset_t mask;
51 int sv_errno, retval, didalloc;
52 struct strbuf ctlbuf;
53
54 if ((tiptr = _t_checkfd(fd, 0, api_semantics)) == NULL)
55 return (-1);
56
57 if (_T_IS_XTI(api_semantics)) {
58 /*
59 * User level state verification only done for XTI
60 * because doing for TLI may break existing applications
61 */
62 if (tiptr->ti_state != T_IDLE) {
63 t_errno = TOUTSTATE;
64 return (-1);
65 }
66 }
67
68 /*
69 * Since unbind is not an idempotent operation, we
70 * block signals around the call.
71 * Note that sig_mutex_lock() only defers signals, it does not
72 * block them, so interruptible syscalls could still get EINTR.
73 */
74 (void) thr_sigsetmask(SIG_SETMASK, &fillset, &mask);
75 sig_mutex_lock(&tiptr->ti_lock);
76 /*
77 * Acquire buffer for use in sending/receiving the message.
78 * Note: assumes (correctly) that ti_ctlsize is large enough
79 * to hold sizeof (struct T_unbind_req/ack)
80 */
81 if (_t_acquire_ctlbuf(tiptr, &ctlbuf, &didalloc) < 0) {
82 sv_errno = errno;
83 sig_mutex_unlock(&tiptr->ti_lock);
84 (void) thr_sigsetmask(SIG_SETMASK, &mask, NULL);
85 errno = sv_errno;
86 return (-1);
87 }
88
89 retval = _tx_unbind_locked(fd, tiptr, &ctlbuf);
90
91 sv_errno = errno;
92 if (didalloc)
93 free(ctlbuf.buf);
94 else
95 tiptr->ti_ctlbuf = ctlbuf.buf;
96 sig_mutex_unlock(&tiptr->ti_lock);
97 (void) thr_sigsetmask(SIG_SETMASK, &mask, NULL);
98 errno = sv_errno;
99 return (retval);
100 }
101
102 int
_tx_unbind_locked(int fd,struct _ti_user * tiptr,struct strbuf * ctlbufp)103 _tx_unbind_locked(int fd, struct _ti_user *tiptr, struct strbuf *ctlbufp)
104 {
105 struct T_unbind_req *unbind_reqp;
106 int retlen;
107
108 if (_t_is_event(fd, tiptr) < 0)
109 return (-1);
110
111 /* LINTED pointer cast */
112 unbind_reqp = (struct T_unbind_req *)ctlbufp->buf;
113 unbind_reqp->PRIM_type = T_UNBIND_REQ;
114
115 if (_t_do_ioctl(fd, (char *)unbind_reqp,
116 (int)sizeof (struct T_unbind_req), TI_UNBIND, &retlen) < 0) {
117 goto err_out;
118 }
119
120 if (ioctl(fd, I_FLUSH, FLUSHRW) < 0) {
121 t_errno = TSYSERR;
122 goto err_out;
123 }
124
125 /*
126 * clear more and expedited data bits
127 */
128 tiptr->ti_flags &= ~(MORE|EXPEDITED);
129
130 _T_TX_NEXTSTATE(T_UNBIND, tiptr,
131 "t_unbind: invalid state event T_UNBIND");
132
133 return (0);
134
135 err_out:
136 return (-1);
137 }
138