usr/src/uts/common/ktli/t_kunbind.c

   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 2005 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 /*      Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
  28 /*        All Rights Reserved   */
  29
  30 /*
  31  * University Copyright- Copyright (c) 1982, 1986, 1988
  32  * The Regents of the University of California
  33  * All Rights Reserved
  34  *
  35  * University Acknowledgment- Portions of this document are derived from
  36  * software developed by the University of California, Berkeley, and its
  37  * contributors.
  38  */
  39
  40 #pragma ident   "%Z%%M% %I%     %E% SMI"
  41
  42 /*
  43  * Kernel TLI-like function to unbind a transport endpoint
  44  * to an address.
  45  *
  46  * Returns 0 on success and ret is set if non-NULL,
  47  * else positive error code.
  48  */
  49
  50 #include <sys/param.h>
  51 #include <sys/types.h>
  52 #include <sys/proc.h>
  53 #include <sys/file.h>
  54 #include <sys/user.h>
  55 #include <sys/errno.h>
  56 #include <sys/stream.h>
  57 #include <sys/strsubr.h>
  58 #include <sys/ioctl.h>
  59 #include <sys/stropts.h>
  60 #include <sys/vnode.h>
  61 #include <sys/tihdr.h>
  62 #include <sys/timod.h>
  63 #include <sys/tiuser.h>
  64 #include <sys/t_kuser.h>
  65 #include <sys/kmem.h>
  66 #include <sys/sysmacros.h>
  67
  68
  69 int
  70 t_kunbind(TIUSER *tiptr)
  71 {
  72         struct T_unbind_req     *unbind_req;
  73         struct T_ok_ack         *ok_ack;
  74         int                     unbindsz;
  75         vnode_t                 *vp;
  76         file_t                  *fp;
  77         char                    *buf;
  78         struct strioctl         strioc;
  79         int                     retval;
  80         int                     error;
  81
  82         error = 0;
  83         retval = 0;
  84         fp = tiptr->fp;
  85         vp = fp->f_vnode;
  86
  87         /*
  88          * send the ioctl request and wait
  89          * for a reply.
  90          */
  91         unbindsz = MAX(TUNBINDREQSZ, TOKACKSZ);
  92         buf = kmem_alloc(unbindsz, KM_SLEEP);
  93         /* LINTED pointer alignment */
  94         unbind_req = (struct T_unbind_req *)buf;
  95         unbind_req->PRIM_type = T_UNBIND_REQ;
  96
  97         strioc.ic_cmd = TI_UNBIND;
  98         strioc.ic_timout = 0;
  99         strioc.ic_dp = buf;
 100         strioc.ic_len = (int)TUNBINDREQSZ;
 101
 102         error = strdoioctl(vp->v_stream, &strioc, FNATIVE, K_TO_K, CRED(),
 103             &retval);
 104         if (error)
 105                 goto badbind;
 106
 107         if (retval) {
 108                 if ((retval & 0xff) == TSYSERR)
 109                         error = (retval >> 8) & 0xff;
 110                 else
 111                         error = t_tlitosyserr(retval & 0xff);
 112                 goto badbind;
 113         }
 114
 115         /* LINTED pointer alignment */
 116         ok_ack = (struct T_ok_ack *)strioc.ic_dp;
 117         if (strioc.ic_len < TOKACKSZ ||
 118             ok_ack->PRIM_type != T_OK_ACK ||
 119             ok_ack->CORRECT_prim != T_UNBIND_REQ)
 120                 error = EIO;
 121
 122 badbind:
 123         kmem_free(buf, unbindsz);
 124         return (error);
 125 }