usr/src/uts/common/inet/nca/ncaddi.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 (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  * Copyright (c) 2011 Bayard G. Bell. All rights reserved.
  25  */
  26
  27 #include <sys/types.h>
  28 #include <sys/conf.h>
  29 #include <sys/modctl.h>
  30 #include <sys/stream.h>
  31 #include <sys/strsubr.h>
  32 #include <sys/strsun.h>
  33 #include <sys/zone.h>
  34 #include <inet/common.h>
  35 #include <inet/led.h>
  36 #include <inet/nd.h>
  37 #include <netinet/in.h>
  38
  39 #include "ncaconf.h"
  40
  41 extern caddr_t  nca_g_nd;       /* Head of 'named dispatch' variable list */
  42
  43 #define INET_NAME       "nca"
  44 #define INET_MODSTRTAB  ncainfo
  45 #define INET_DEVSTRTAB  ncainfo
  46 #define INET_MODDESC    "NCA STREAMS module 1.6"
  47 #define INET_DEVDESC    "NCA STREAMS driver 1.6"
  48 #define INET_DEVMINOR   0
  49 #define INET_DEVMTFLAGS D_MP
  50 #define INET_MODMTFLAGS D_MP
  51
  52 #include "../inetddi.c"
  53
  54 /*ARGSUSED*/
  55 static int
  56 nca_open(queue_t *q, dev_t *devp, int flag, int sflag, cred_t *credp)
  57 {
  58         /* Reopen supported */
  59         if (q->q_ptr != NULL)
  60                 return (0);
  61
  62         /*
  63          * NCA is not supported in non-global zones; we enforce this restriction
  64          * here.
  65          */
  66         if (credp != NULL && crgetzoneid(credp) != GLOBAL_ZONEID) {
  67                 return (ENOTSUP);
  68         }
  69
  70         if (! (sflag & MODOPEN)) {
  71                 /* Device instance */
  72                 RD(q)->q_ptr = (void *)B_TRUE;
  73                 WR(q)->q_ptr = (void *)B_TRUE;
  74         } else {
  75                 /* Modopen just pass through */
  76                 RD(q)->q_ptr = (void *)B_FALSE;
  77                 WR(q)->q_ptr = (void *)B_FALSE;
  78         }
  79         qprocson(q);
  80         return (0);
  81 }
  82
  83 /* ARGSUSED */
  84 static int
  85 nca_close(queue_t *q, int flags __unused, cred_t *credp __unused)
  86 {
  87         qprocsoff(q);
  88         RD(q)->q_ptr = NULL;
  89         WR(q)->q_ptr = NULL;
  90         return (0);
  91 }
  92
  93 static void
  94 nca_rput(queue_t *q, mblk_t *mp)
  95 {
  96         /* Passthrough */
  97         putnext(q, mp);
  98 }
  99
 100 static void
 101 nca_wput(queue_t *q, mblk_t *mp)
 102 {
 103         struct iocblk   *iocp;
 104
 105         if (! (boolean_t)q->q_ptr) {
 106                 iocp = (struct iocblk *)mp->b_rptr;
 107                 if (DB_TYPE(mp) == M_IOCTL && iocp->ioc_cmd == NCA_SET_IF) {
 108                         miocnak(q, mp, 0, ENOTSUP);
 109                         return;
 110                 }
 111                 /* Module, passthrough */
 112                 putnext(q, mp);
 113                 return;
 114         }
 115
 116         switch (DB_TYPE(mp)) {
 117         case M_IOCTL:
 118                 iocp = (struct iocblk *)mp->b_rptr;
 119                 switch (iocp->ioc_cmd) {
 120                 case ND_SET:
 121                 case ND_GET:
 122                         if (! nd_getset(q, nca_g_nd, mp)) {
 123                                 miocnak(q, mp, 0, ENOENT);
 124                                 return;
 125                         }
 126                         qreply(q, mp);
 127                         break;
 128                 default:
 129                         miocnak(q, mp, 0, ENOTSUP);
 130                         break;
 131                 }
 132                 break;
 133         default:
 134                 freemsg(mp);
 135                 break;
 136         }
 137 }
 138
 139 static struct module_info info = {
 140         0, "nca", 1, INFPSZ, 65536, 1024
 141 };
 142
 143 static struct qinit rinit = {
 144         (pfi_t)nca_rput, NULL, nca_open, nca_close, NULL, &info
 145 };
 146
 147 static struct qinit winit = {
 148         (pfi_t)nca_wput, NULL, nca_open, nca_close, NULL, &info
 149 };
 150
 151 struct streamtab ncainfo = {
 152         &rinit, &winit
 153 };
 154
 155 int
 156 _init(void)
 157 {
 158         return (mod_install(&modlinkage));
 159 }
 160
 161 int
 162 _fini(void)
 163 {
 164         return (EBUSY);
 165 }
 166
 167 int
 168 _info(struct modinfo *modinfop)
 169 {
 170         return (mod_info(&modlinkage, modinfop));
 171 }