stand/common/devopen.c

   1 /*-
   2  * Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
   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  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  */
  26
  27 #include <stand.h>
  28 #include <string.h>
  29
  30 #include "bootstrap.h"
  31
  32 #ifdef LOADER_GELI_SUPPORT
  33 #include "geliboot.h"
  34 #endif
  35
  36 int
  37 devopen(struct open_file *f, const char *fname, const char **file)
  38 {
  39         struct devdesc *dev;
  40         int result;
  41
  42         result = archsw.arch_getdev((void **)&dev, fname, file);
  43         if (result)
  44                 return (result);
  45
  46         /* point to device-specific data so that device open can use it */
  47         f->f_dev = dev->d_dev;
  48         f->f_devdata = dev;
  49         result = dev->d_dev->dv_open(f, dev);
  50         if (result != 0) {
  51                 f->f_devdata = NULL;
  52                 f->f_dev = NULL;
  53                 free(dev);
  54                 return (result);
  55         }
  56
  57 #ifdef LOADER_GELI_SUPPORT
  58         /*
  59          * If f->f_dev is geli-encrypted and we can decrypt it (will prompt for
  60          * pw if needed), this will attach the geli code to the open_file by
  61          * replacing f->f_dev and f_devdata with pointers to a geli_devdesc.
  62          */
  63         geli_probe_and_attach(f);
  64 #endif
  65
  66         return (0);
  67 }
  68
  69 int
  70 devclose(struct open_file *f)
  71 {
  72
  73         free(f->f_devdata);
  74         return (0);
  75 }