freebsd32_ioctl.c

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    1 /*-
    2  * Copyright (c) 2008 David E. O'Brien
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  * 3. Neither the name of the author nor the names of its contributors
   14  *    may be used to endorse or promote products derived from this software
   15  *    without specific prior written permission.
   16  *
   17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   27  * SUCH DAMAGE.
   28  */
   29 
   30 #include <sys/cdefs.h>
   31 __FBSDID("$FreeBSD$");
   32 
   33 #include "opt_compat.h"
   34 
   35 #include <sys/param.h>
   36 #include <sys/cdio.h>
   37 #include <sys/fcntl.h>
   38 #include <sys/file.h>
   39 #include <sys/ioccom.h>
   40 #include <sys/mdioctl.h>
   41 #include <sys/proc.h>
   42 #include <sys/syscall.h>
   43 #include <sys/syscallsubr.h>
   44 #include <sys/sysctl.h>
   45 #include <sys/sysent.h>
   46 #include <sys/sysproto.h>
   47 #include <sys/systm.h>
   48 
   49 #include <compat/freebsd32/freebsd32.h>
   50 #include <compat/freebsd32/freebsd32_ioctl.h>
   51 #include <compat/freebsd32/freebsd32_proto.h>
   52 
   53 /* Cannot get exact size in 64-bit due to alignment issue of entire struct. */
   54 CTASSERT((sizeof(struct md_ioctl32)+4) == 436);
   55 CTASSERT(sizeof(struct ioc_read_toc_entry32) == 8);
   56 CTASSERT(sizeof(struct ioc_toc_header32) == 4);
   57 
   58 
   59 static int
   60 freebsd32_ioctl_md(struct thread *td, struct freebsd32_ioctl_args *uap,
   61     struct file *fp)
   62 {
   63         struct md_ioctl mdv;
   64         struct md_ioctl32 md32;
   65         u_long com = 0;
   66         int error;
   67 
   68         if (uap->data == NULL)
   69                 panic("%s: where is my ioctl data??", __func__);
   70         if (uap->com & IOC_IN) {
   71                 if ((error = copyin(uap->data, &md32, sizeof(md32)))) {
   72                         fdrop(fp, td);
   73                         return (error);
   74                 }
   75                 CP(md32, mdv, md_version);
   76                 CP(md32, mdv, md_unit);
   77                 CP(md32, mdv, md_type);
   78                 PTRIN_CP(md32, mdv, md_file);
   79                 CP(md32, mdv, md_mediasize);
   80                 CP(md32, mdv, md_sectorsize);
   81                 CP(md32, mdv, md_options);
   82                 CP(md32, mdv, md_base);
   83                 CP(md32, mdv, md_fwheads);
   84                 CP(md32, mdv, md_fwsectors);
   85         } else if (uap->com & IOC_OUT) {
   86                 /*
   87                  * Zero the buffer so the user always
   88                  * gets back something deterministic.
   89                  */
   90                 bzero(&mdv, sizeof mdv);
   91         }
   92 
   93         switch (uap->com) {
   94         case MDIOCATTACH_32:
   95                 com = MDIOCATTACH;
   96                 break;
   97         case MDIOCDETACH_32:
   98                 com = MDIOCDETACH;
   99                 break;
  100         case MDIOCQUERY_32:
  101                 com = MDIOCQUERY;
  102                 break;
  103         case MDIOCLIST_32:
  104                 com = MDIOCLIST;
  105                 break;
  106         default:
  107                 panic("%s: unknown MDIOC %#x", __func__, uap->com);
  108         }
  109         error = fo_ioctl(fp, com, (caddr_t)&mdv, td->td_ucred, td);
  110         if (error == 0 && (com & IOC_OUT)) {
  111                 CP(mdv, md32, md_version);
  112                 CP(mdv, md32, md_unit);
  113                 CP(mdv, md32, md_type);
  114                 PTROUT_CP(mdv, md32, md_file);
  115                 CP(mdv, md32, md_mediasize);
  116                 CP(mdv, md32, md_sectorsize);
  117                 CP(mdv, md32, md_options);
  118                 CP(mdv, md32, md_base);
  119                 CP(mdv, md32, md_fwheads);
  120                 CP(mdv, md32, md_fwsectors);
  121                 error = copyout(&md32, uap->data, sizeof(md32));
  122         }
  123         fdrop(fp, td);
  124         return error;
  125 }
  126 
  127 
  128 static int
  129 freebsd32_ioctl_ioc_toc_header(struct thread *td,
  130     struct freebsd32_ioctl_args *uap, struct file *fp)
  131 {
  132         struct ioc_toc_header toch;
  133         struct ioc_toc_header32 toch32;
  134         int error;
  135 
  136         if (uap->data == NULL)
  137                 panic("%s: where is my ioctl data??", __func__);
  138 
  139         if ((error = copyin(uap->data, &toch32, sizeof(toch32))))
  140                 return (error);
  141         CP(toch32, toch, len);
  142         CP(toch32, toch, starting_track);
  143         CP(toch32, toch, ending_track);
  144         error = fo_ioctl(fp, CDIOREADTOCHEADER, (caddr_t)&toch,
  145             td->td_ucred, td);
  146         fdrop(fp, td);
  147         return (error);
  148 }
  149 
  150 
  151 static int
  152 freebsd32_ioctl_ioc_read_toc(struct thread *td,
  153     struct freebsd32_ioctl_args *uap, struct file *fp)
  154 {
  155         struct ioc_read_toc_entry toce;
  156         struct ioc_read_toc_entry32 toce32;
  157         int error;
  158 
  159         if (uap->data == NULL)
  160                 panic("%s: where is my ioctl data??", __func__);
  161 
  162         if ((error = copyin(uap->data, &toce32, sizeof(toce32))))
  163                 return (error);
  164         CP(toce32, toce, address_format);
  165         CP(toce32, toce, starting_track);
  166         CP(toce32, toce, data_len);
  167         PTRIN_CP(toce32, toce, data);
  168 
  169         if ((error = fo_ioctl(fp, CDIOREADTOCENTRYS, (caddr_t)&toce,
  170             td->td_ucred, td))) {
  171                 CP(toce, toce32, address_format);
  172                 CP(toce, toce32, starting_track);
  173                 CP(toce, toce32, data_len);
  174                 PTROUT_CP(toce, toce32, data);
  175                 error = copyout(&toce32, uap->data, sizeof(toce32));
  176         }
  177         fdrop(fp, td);
  178         return error;
  179 }
  180 
  181 
  182 int
  183 freebsd32_ioctl(struct thread *td, struct freebsd32_ioctl_args *uap)
  184 {
  185         struct ioctl_args ap /*{
  186                 int     fd;
  187                 u_long  com;
  188                 caddr_t data;
  189         }*/ ;
  190         struct file *fp;
  191         int error;
  192 
  193         if ((error = fget(td, uap->fd, &fp)) != 0)
  194                 return (error);
  195         if ((fp->f_flag & (FREAD | FWRITE)) == 0) {
  196                 fdrop(fp, td);
  197                 return (EBADF);
  198         }
  199 
  200         switch (uap->com) {
  201         case MDIOCATTACH_32:    /* FALLTHROUGH */
  202         case MDIOCDETACH_32:    /* FALLTHROUGH */
  203         case MDIOCQUERY_32:     /* FALLTHROUGH */
  204         case MDIOCLIST_32:
  205                 return freebsd32_ioctl_md(td, uap, fp);
  206 
  207         case CDIOREADTOCENTRYS_32:
  208                 return freebsd32_ioctl_ioc_read_toc(td, uap, fp);
  209 
  210         case CDIOREADTOCHEADER_32:
  211                 return freebsd32_ioctl_ioc_toc_header(td, uap, fp);
  212 
  213         default:
  214                 fdrop(fp, td);
  215                 ap.fd = uap->fd;
  216                 ap.com = uap->com;
  217                 PTRIN_CP(*uap, ap, data);
  218                 return ioctl(td, &ap);
  219         }
  220 }

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FreeBSD/Linux Kernel Cross Reference sys/compat/freebsd32/freebsd32_ioctl.c

FreeBSD/Linux Kernel Cross Reference
sys/compat/freebsd32/freebsd32_ioctl.c