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 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