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 1.3.4.1 */ 32 33 #include "mt.h" 34 #include <stdlib.h> 35 #include <errno.h> 36 #include <unistd.h> 37 #include <sys/stropts.h> 38 #include <sys/stream.h> 39 #define _SUN_TPI_VERSION 2 40 #include <sys/tihdr.h> 41 #include <sys/timod.h> 42 #include <xti.h> 43 #include <signal.h> 44 #include <syslog.h> 45 #include "tx.h" 46 47 48 int 49 _tx_unbind(int fd, int api_semantics) 50 { 51 struct _ti_user *tiptr; 52 sigset_t mask; 53 int sv_errno, retval, didalloc; 54 struct strbuf ctlbuf; 55 56 if ((tiptr = _t_checkfd(fd, 0, api_semantics)) == NULL) 57 return (-1); 58 59 if (_T_IS_XTI(api_semantics)) { 60 /* 61 * User level state verification only done for XTI 62 * because doing for TLI may break existing applications 63 */ 64 if (tiptr->ti_state != T_IDLE) { 65 t_errno = TOUTSTATE; 66 return (-1); 67 } 68 } 69 70 /* 71 * Since unbind is not an idempotent operation, we 72 * block signals around the call. 73 * Note that sig_mutex_lock() only defers signals, it does not 74 * block them, so interruptible syscalls could still get EINTR. 75 */ 76 (void) thr_sigsetmask(SIG_SETMASK, &fillset, &mask); 77 sig_mutex_lock(&tiptr->ti_lock); 78 /* 79 * Acquire buffer for use in sending/receiving the message. 80 * Note: assumes (correctly) that ti_ctlsize is large enough 81 * to hold sizeof (struct T_unbind_req/ack) 82 */ 83 if (_t_acquire_ctlbuf(tiptr, &ctlbuf, &didalloc) < 0) { 84 sv_errno = errno; 85 sig_mutex_unlock(&tiptr->ti_lock); 86 (void) thr_sigsetmask(SIG_SETMASK, &mask, NULL); 87 errno = sv_errno; 88 return (-1); 89 } 90 91 retval = _tx_unbind_locked(fd, tiptr, &ctlbuf); 92 93 sv_errno = errno; 94 if (didalloc) 95 free(ctlbuf.buf); 96 else 97 tiptr->ti_ctlbuf = ctlbuf.buf; 98 sig_mutex_unlock(&tiptr->ti_lock); 99 (void) thr_sigsetmask(SIG_SETMASK, &mask, NULL); 100 errno = sv_errno; 101 return (retval); 102 } 103 104 int 105 _tx_unbind_locked(int fd, struct _ti_user *tiptr, struct strbuf *ctlbufp) 106 { 107 struct T_unbind_req *unbind_reqp; 108 int retlen; 109 110 if (_t_is_event(fd, tiptr) < 0) 111 return (-1); 112 113 /* LINTED pointer cast */ 114 unbind_reqp = (struct T_unbind_req *)ctlbufp->buf; 115 unbind_reqp->PRIM_type = T_UNBIND_REQ; 116 117 if (_t_do_ioctl(fd, (char *)unbind_reqp, 118 (int)sizeof (struct T_unbind_req), TI_UNBIND, &retlen) < 0) { 119 goto err_out; 120 } 121 122 if (_ioctl(fd, I_FLUSH, FLUSHRW) < 0) { 123 t_errno = TSYSERR; 124 goto err_out; 125 } 126 127 /* 128 * clear more and expedited data bits 129 */ 130 tiptr->ti_flags &= ~(MORE|EXPEDITED); 131 132 _T_TX_NEXTSTATE(T_UNBIND, tiptr, 133 "t_unbind: invalid state event T_UNBIND"); 134 135 return (0); 136 137 err_out: 138 return (-1); 139 } 140