usr/src/uts/common/ktli/t_kfree.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 1997 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  * Free the specified kernel tli data structure.
  44  *
  45  * Returns:
  46  *      0 on success or
  47  *      positive error code.
  48  */
  49
  50 #include <sys/param.h>
  51 #include <sys/types.h>
  52 #include <sys/user.h>
  53 #include <sys/stream.h>
  54 #include <sys/ioctl.h>
  55 #include <sys/file.h>
  56 #include <sys/stropts.h>
  57 #include <sys/tihdr.h>
  58 #include <sys/timod.h>
  59 #include <sys/tiuser.h>
  60 #include <sys/errno.h>
  61 #include <sys/t_kuser.h>
  62 #include <sys/kmem.h>
  63
  64
  65 /*ARGSUSED*/
  66 int
  67 t_kfree(TIUSER *tiptr, char *ptr, int struct_type)
  68 {
  69         union structptrs {
  70                 struct t_bind           *bind;
  71                 struct t_call           *call;
  72                 struct t_discon         *dis;
  73                 struct t_optmgmt        *opt;
  74                 struct t_kunitdata      *udata;
  75                 struct t_uderr          *uderr;
  76         } p;
  77         int error = 0;
  78
  79         /*
  80          * Free all the buffers associated with the appropriate
  81          * fields of each structure.
  82          */
  83
  84         switch (struct_type) {
  85         case T_BIND:
  86                 /* LINTED pointer alignment */
  87                 p.bind = (struct t_bind *)ptr;
  88                 if (p.bind->addr.buf != NULL)
  89                         kmem_free(p.bind->addr.buf, p.bind->addr.maxlen);
  90                 kmem_free(ptr, sizeof (struct t_bind));
  91                 break;
  92
  93         case T_CALL:
  94                 /* LINTED pointer alignment */
  95                 p.call = (struct t_call *)ptr;
  96                 if (p.call->addr.buf != NULL)
  97                         kmem_free(p.call->addr.buf, p.call->addr.maxlen);
  98                 if (p.call->opt.buf != NULL)
  99                         kmem_free(p.call->opt.buf, p.call->opt.maxlen);
 100                 if (p.call->udata.buf != NULL)
 101                         kmem_free(p.call->udata.buf, p.call->udata.maxlen);
 102                 kmem_free(ptr, sizeof (struct t_call));
 103                 break;
 104
 105         case T_OPTMGMT:
 106                 /* LINTED pointer alignment */
 107                 p.opt = (struct t_optmgmt *)ptr;
 108                 if (p.opt->opt.buf != NULL)
 109                         kmem_free(p.opt->opt.buf, p.opt->opt.maxlen);
 110                 kmem_free(ptr, sizeof (struct t_optmgmt));
 111                 break;
 112
 113         case T_DIS:
 114                 /* LINTED pointer alignment */
 115                 p.dis = (struct t_discon *)ptr;
 116                 if (p.dis->udata.buf != NULL)
 117                         kmem_free(p.dis->udata.buf, p.dis->udata.maxlen);
 118                 kmem_free(ptr, sizeof (struct t_discon));
 119                 break;
 120
 121         case T_UNITDATA:
 122                 /* LINTED pointer alignment */
 123                 p.udata = (struct t_kunitdata *)ptr;
 124
 125                 if (p.udata->udata.udata_mp) {
 126                         KTLILOG(2, "t_kfree: freeing mblk_t %x, ",
 127                             p.udata->udata.udata_mp);
 128                         KTLILOG(2, "ref %d\n",
 129                             p.udata->udata.udata_mp->b_datap->db_ref);
 130                         freemsg(p.udata->udata.udata_mp);
 131                 }
 132                 if (p.udata->opt.buf != NULL)
 133                         kmem_free(p.udata->opt.buf, p.udata->opt.maxlen);
 134                 if (p.udata->addr.buf != NULL) {
 135                         KTLILOG(2, "t_kfree: freeing address %x, ",
 136                             p.udata->addr.buf);
 137                         KTLILOG(2, "len %d\n", p.udata->addr.maxlen);
 138                         kmem_free(p.udata->addr.buf, p.udata->addr.maxlen);
 139                 }
 140                 KTLILOG(2, "t_kfree: freeing t_kunitdata\n", 0);
 141                 kmem_free(ptr, sizeof (struct t_kunitdata));
 142                 break;
 143
 144         case T_UDERROR:
 145                 /* LINTED pointer alignment */
 146                 p.uderr = (struct t_uderr *)ptr;
 147                 if (p.uderr->addr.buf != NULL)
 148                         kmem_free(p.uderr->addr.buf, p.uderr->addr.maxlen);
 149                 if (p.uderr->opt.buf != NULL)
 150                         kmem_free(p.uderr->opt.buf, p.uderr->opt.maxlen);
 151                 kmem_free(ptr, sizeof (struct t_uderr));
 152                 break;
 153
 154         case T_INFO:
 155                 break;
 156
 157         default:
 158                 error = EINVAL;
 159                 break;
 160         }
 161
 162         return (error);
 163 }