sys/rump/librump/rumpvfs/devnodes.c

   1 /*      $NetBSD: devnodes.c,v 1.3 2009/12/03 15:28:49 tron Exp $        */
   2
   3 /*
   4  * Copyright (c) 2009 Antti Kantee.  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 ``AS IS'' AND ANY EXPRESS
  16  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  17  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  18  * 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 OR
  21  * 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: devnodes.c,v 1.3 2009/12/03 15:28:49 tron Exp $");
  30
  31 #include <sys/param.h>
  32 #include <sys/device.h>
  33 #include <sys/filedesc.h>
  34 #include <sys/kmem.h>
  35 #include <sys/lwp.h>
  36 #include <sys/stat.h>
  37 #include <sys/vfs_syscalls.h>
  38
  39 #include "rump_vfs_private.h"
  40
  41 /* realqvik(tm) "devfs" */
  42 int
  43 rump_vfs_makeonedevnode(dev_t devtype, const char *devname,
  44         devmajor_t majnum, devminor_t minnum)
  45 {
  46         register_t retval;
  47
  48         return do_sys_mknod(curlwp, devname, 0666 | devtype,
  49             makedev(majnum, minnum), &retval, UIO_SYSSPACE);
  50 }
  51
  52 int
  53 rump_vfs_makedevnodes(dev_t devtype, const char *basename, char minchar,
  54         devmajor_t maj, devminor_t minnum, int nnodes)
  55 {
  56         int error = 0;
  57         char *devname, *p;
  58         size_t devlen;
  59         register_t retval;
  60
  61         devlen = strlen(basename) + 1 + 1; /* +letter +0 */
  62         devname = kmem_zalloc(devlen, KM_SLEEP);
  63         strlcpy(devname, basename, devlen);
  64         p = devname + devlen-2;
  65
  66         for (; nnodes > 0; nnodes--, minchar++, minnum++) {
  67                 KASSERT(minchar <= 'z');
  68                 *p = minchar;
  69
  70                 if ((error = do_sys_mknod(curlwp, devname, 0666 | devtype,
  71                     makedev(maj, minnum), &retval, UIO_SYSSPACE)))
  72                         goto out;
  73         }
  74
  75  out:
  76         kmem_free(devname, devlen);
  77         return error;
  78 }