linux_mtio.c

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    1 /* $NetBSD: linux_mtio.c,v 1.1 2005/02/28 22:11:32 soren Exp $ */
    2 
    3 /*
    4  * Copyright (c) 2005 Soren S. Jorvang.  All rights reserved.
    5  *
    6  * Redistribution and use in source and binary forms, with or without
    7  * modification, are permitted provided that the following conditions
    8  * are met:
    9  * 1. Redistributions of source code must retain the above copyright
   10  *    notice, this list of conditions, and the following disclaimer.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in the
   13  *    documentation and/or other materials provided with the distribution.
   14  *
   15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   25  * SUCH DAMAGE.
   26  */
   27 
   28 #include <sys/cdefs.h>
   29 __KERNEL_RCSID(0, "$NetBSD: linux_mtio.c,v 1.1 2005/02/28 22:11:32 soren Exp $");
   30 
   31 #include <sys/param.h>
   32 #include <sys/systm.h>
   33 #include <sys/ioctl.h>
   34 #include <sys/file.h>
   35 #include <sys/filedesc.h>
   36 #include <sys/mount.h>
   37 #include <sys/proc.h>
   38 
   39 #include <sys/mtio.h>
   40 
   41 #include <sys/sa.h>
   42 #include <sys/syscallargs.h>
   43 
   44 #include <compat/linux/common/linux_types.h>
   45 #include <compat/linux/common/linux_ioctl.h>
   46 #include <compat/linux/common/linux_signal.h>
   47 #include <compat/linux/common/linux_mtio.h>
   48 
   49 #include <compat/linux/linux_syscallargs.h>
   50 
   51 static const struct mtop_mapping {
   52         short   lop;
   53         short   op;
   54 } mtop_map[] = {
   55         { LINUX_MTFSF,          MTFSF },
   56         { LINUX_MTBSF,          MTBSF },
   57         { LINUX_MTFSR,          MTFSR },
   58         { LINUX_MTBSR,          MTBSR },
   59         { LINUX_MTWEOF,         MTWEOF },
   60         { LINUX_MTREW,          MTREW },
   61         { LINUX_MTOFFL,         MTOFFL },
   62         { LINUX_MTNOP,          MTNOP },
   63         { LINUX_MTRETEN,        MTRETEN },
   64         { LINUX_MTEOM,          MTEOM },
   65         { LINUX_MTERASE,        MTERASE },
   66         { LINUX_MTSETBLK,       MTSETBSIZ },
   67         { LINUX_MTSETDENSITY,   MTSETDNSTY },
   68         { LINUX_MTCOMPRESSION,  MTCMPRESS },
   69         { -1, -1 }
   70 };
   71 
   72 int
   73 linux_ioctl_mtio(struct proc *p, struct linux_sys_ioctl_args *uap,
   74     register_t *retval)
   75 {
   76         struct file *fp;
   77         struct filedesc *fdp;
   78         u_long com = SCARG(uap, com);
   79         int i, error = 0;
   80         int (*ioctlf)(struct file *, u_long, void *, struct proc *);
   81         struct linux_mtop lmtop;
   82         struct linux_mtget lmtget;
   83         struct mtop mt;
   84 
   85         fdp = p->p_fd;
   86         if ((fp = fd_getfile(fdp, SCARG(uap, fd))) == NULL)
   87                 return EBADF;
   88 
   89         FILE_USE(fp);
   90         ioctlf = fp->f_ops->fo_ioctl;
   91 
   92         *retval = 0;
   93         switch (com) {
   94         case LINUX_MTIOCTOP:
   95                 error = copyin(SCARG(uap, data), &lmtop, sizeof lmtop);
   96                 for (i = 0; mtop_map[i].lop >= 0; i++) {
   97                         if (mtop_map[i].lop == lmtop.mt_op)
   98                                 break;
   99                 }
  100 
  101                 if (mtop_map[i].lop == -1) {
  102                         error = EINVAL;
  103                         break;
  104                 }
  105                 
  106                 mt.mt_op = mtop_map[i].op;
  107                 mt.mt_count = lmtop.mt_count;
  108                 error = ioctlf(fp, MTIOCTOP, (caddr_t)&mt, p);
  109                 break;
  110         case LINUX_MTIOCGET:
  111                 lmtget.mt_type = LINUX_MT_ISUNKNOWN;
  112                 lmtget.mt_resid = 0;
  113                 lmtget.mt_dsreg = 0;
  114                 lmtget.mt_gstat = 0;
  115                 lmtget.mt_erreg = 0;
  116                 lmtget.mt_fileno = 0;
  117                 lmtget.mt_blkno = 0;
  118                 error = copyout(&lmtget, SCARG(uap, data), sizeof lmtget);
  119                 break;
  120         case LINUX_MTIOCPOS:
  121         default:
  122                 printf("linux_mtio unsupported ioctl 0x%lx\n", com);
  123                 error = ENODEV;
  124                 break;
  125         }
  126 
  127         FILE_UNUSE(fp, p);
  128 
  129         return error;
  130 }

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FreeBSD/Linux Kernel Cross Reference sys/compat/linux/common/linux_mtio.c

FreeBSD/Linux Kernel Cross Reference
sys/compat/linux/common/linux_mtio.c