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 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 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