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 /* 32 * t_sndrel.c and t_sndreldata.c are very similar and contain common code. 33 * Any changes to either of them should be reviewed to see whether they 34 * are applicable to the other file. 35 */ 36 #include "mt.h" 37 #include <errno.h> 38 #include <stropts.h> 39 #include <sys/stream.h> 40 #define _SUN_TPI_VERSION 2 41 #include <sys/tihdr.h> 42 #include <sys/timod.h> 43 #include <xti.h> 44 #include "tx.h" 45 46 int 47 _tx_sndrel(int fd, int api_semantics) 48 { 49 struct T_ordrel_req orreq; 50 struct strbuf ctlbuf; 51 struct _ti_user *tiptr; 52 53 if ((tiptr = _t_checkfd(fd, 0, api_semantics)) == NULL) 54 return (-1); 55 sig_mutex_lock(&tiptr->ti_lock); 56 57 if (tiptr->ti_servtype != T_COTS_ORD) { 58 t_errno = TNOTSUPPORT; 59 sig_mutex_unlock(&tiptr->ti_lock); 60 return (-1); 61 } 62 63 if (_T_IS_XTI(api_semantics)) { 64 /* 65 * User level state verification only done for XTI 66 * because doing for TLI may break existing applications 67 */ 68 if (!(tiptr->ti_state == T_DATAXFER || 69 tiptr->ti_state == T_INREL)) { 70 t_errno = TOUTSTATE; 71 sig_mutex_unlock(&tiptr->ti_lock); 72 return (-1); 73 } 74 75 if (_t_look_locked(fd, tiptr, 0, 76 api_semantics) == T_DISCONNECT) { 77 t_errno = TLOOK; 78 sig_mutex_unlock(&tiptr->ti_lock); 79 return (-1); 80 } 81 82 } 83 84 orreq.PRIM_type = T_ORDREL_REQ; 85 ctlbuf.maxlen = (int)sizeof (struct T_ordrel_req); 86 ctlbuf.len = (int)sizeof (struct T_ordrel_req); 87 ctlbuf.buf = (caddr_t)&orreq; 88 89 /* 90 * Calls to send data (write or putmsg) can potentially 91 * block, for MT case, we drop the lock and enable signals here 92 * and acquire it back 93 */ 94 sig_mutex_unlock(&tiptr->ti_lock); 95 if (putmsg(fd, &ctlbuf, NULL, 0) < 0) { 96 if (errno == EAGAIN) 97 t_errno = TFLOW; 98 else 99 t_errno = TSYSERR; 100 return (-1); 101 } 102 sig_mutex_lock(&tiptr->ti_lock); 103 _T_TX_NEXTSTATE(T_SNDREL, tiptr, 104 "t_sndrel: invalid state on event T_SNDREL"); 105 sig_mutex_unlock(&tiptr->ti_lock); 106 return (0); 107 } 108