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 /* 24 * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 25 * Use is subject to license terms. 26 */ 27 /* 28 * Copyright 2014 Nexenta Systems, Inc. All rights reserved. 29 */ 30 31 /* 32 * t_sndudata.c and t_sndvudata.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 <stdlib.h> 38 #include <errno.h> 39 #include <stropts.h> 40 #include <sys/stream.h> 41 #define _SUN_TPI_VERSION 2 42 #include <sys/tihdr.h> 43 #include <sys/timod.h> 44 #include <xti.h> 45 #include <syslog.h> 46 #include <assert.h> 47 #include "tx.h" 48 49 int 50 _tx_sndvudata(int fd, const struct t_unitdata *unitdata, struct t_iovec *tiov, 51 unsigned int tiovcount, int api_semantics) 52 { 53 struct T_unitdata_req *udreq; 54 struct strbuf ctlbuf; 55 struct strbuf databuf; 56 int size; 57 struct _ti_user *tiptr; 58 int sv_errno; 59 int didalloc; 60 char *dataptr = NULL; 61 unsigned int nbytes; 62 63 assert(api_semantics == TX_XTI_XNS5_API); 64 if ((tiptr = _t_checkfd(fd, 0, api_semantics)) == NULL) 65 return (-1); 66 sig_mutex_lock(&tiptr->ti_lock); 67 68 if (tiptr->ti_servtype != T_CLTS) { 69 t_errno = TNOTSUPPORT; 70 sig_mutex_unlock(&tiptr->ti_lock); 71 return (-1); 72 } 73 74 if (tiovcount == 0 || tiovcount > T_IOV_MAX) { 75 t_errno = TBADDATA; 76 sig_mutex_unlock(&tiptr->ti_lock); 77 return (-1); 78 } 79 80 if (tiptr->ti_state != T_IDLE) { 81 t_errno = TOUTSTATE; 82 sig_mutex_unlock(&tiptr->ti_lock); 83 return (-1); 84 } 85 86 nbytes = _t_bytecount_upto_intmax(tiov, tiovcount); 87 88 if ((nbytes == 0) && 89 !(tiptr->ti_prov_flag & (SENDZERO|OLD_SENDZERO))) { 90 t_errno = TBADDATA; 91 sig_mutex_unlock(&tiptr->ti_lock); 92 return (-1); 93 } 94 95 if ((tiptr->ti_maxpsz > 0) && (nbytes > (uint32_t)tiptr->ti_maxpsz)) { 96 t_errno = TBADDATA; 97 sv_errno = errno; 98 sig_mutex_unlock(&tiptr->ti_lock); 99 errno = sv_errno; 100 return (-1); 101 } 102 103 /* 104 * Acquire ctlbuf for use in sending/receiving control part 105 * of the message. 106 */ 107 if (_t_acquire_ctlbuf(tiptr, &ctlbuf, &didalloc) < 0) { 108 sv_errno = errno; 109 sig_mutex_unlock(&tiptr->ti_lock); 110 errno = sv_errno; 111 return (-1); 112 } 113 114 /* LINTED pointer cast */ 115 udreq = (struct T_unitdata_req *)ctlbuf.buf; 116 117 udreq->PRIM_type = T_UNITDATA_REQ; 118 udreq->DEST_length = unitdata->addr.len; 119 udreq->DEST_offset = 0; 120 udreq->OPT_length = unitdata->opt.len; 121 udreq->OPT_offset = 0; 122 size = (int)sizeof (struct T_unitdata_req); 123 124 if (unitdata->addr.len) { 125 if (_t_aligned_copy(&ctlbuf, unitdata->addr.len, size, 126 unitdata->addr.buf, &udreq->DEST_offset) < 0) { 127 /* 128 * Aligned copy based will overflow buffer 129 * allocated based on maximum transport address 130 * size information 131 */ 132 t_errno = TSYSERR; 133 errno = EPROTO; 134 goto err_out; 135 } 136 size = udreq->DEST_offset + udreq->DEST_length; 137 } 138 if (unitdata->opt.len) { 139 if (_t_aligned_copy(&ctlbuf, unitdata->opt.len, size, 140 unitdata->opt.buf, &udreq->OPT_offset) < 0) { 141 /* 142 * Aligned copy based will overflow buffer 143 * allocated based on maximum transport option 144 * size information 145 */ 146 t_errno = TSYSERR; 147 errno = EPROTO; 148 goto err_out; 149 } 150 size = udreq->OPT_offset + udreq->OPT_length; 151 } 152 153 if (size > (int)ctlbuf.maxlen) { 154 t_errno = TSYSERR; 155 errno = EIO; 156 goto err_out; 157 } 158 159 ctlbuf.len = size; 160 161 if (nbytes != 0) { 162 if ((dataptr = malloc((size_t)nbytes)) == NULL) { 163 t_errno = TSYSERR; 164 goto err_out; 165 } 166 _t_gather(dataptr, tiov, tiovcount); 167 } 168 databuf.buf = dataptr; 169 databuf.len = nbytes; 170 databuf.maxlen = nbytes; 171 /* 172 * Calls to send data (write or putmsg) can potentially 173 * block, for MT case, we drop the lock and enable signals here 174 * and acquire it back 175 */ 176 sig_mutex_unlock(&tiptr->ti_lock); 177 if (putmsg(fd, &ctlbuf, &databuf, 0) < 0) { 178 if (errno == EAGAIN) 179 t_errno = TFLOW; 180 else 181 t_errno = TSYSERR; 182 sv_errno = errno; 183 sig_mutex_lock(&tiptr->ti_lock); 184 errno = sv_errno; 185 goto err_out; 186 } 187 sig_mutex_lock(&tiptr->ti_lock); 188 189 _T_TX_NEXTSTATE(T_SNDUDATA, tiptr, 190 "t_sndvudata: invalid state event T_SNDUDATA"); 191 if (didalloc) 192 free(ctlbuf.buf); 193 else 194 tiptr->ti_ctlbuf = ctlbuf.buf; 195 free(dataptr); 196 sig_mutex_unlock(&tiptr->ti_lock); 197 return (0); 198 err_out: 199 sv_errno = errno; 200 if (didalloc) 201 free(ctlbuf.buf); 202 else 203 tiptr->ti_ctlbuf = ctlbuf.buf; 204 free(dataptr); 205 sig_mutex_unlock(&tiptr->ti_lock); 206 errno = sv_errno; 207 return (-1); 208 } 209