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devnodes.c revision 1.1.2.2 
      1  1.1.2.2  yamt /*	$NetBSD: devnodes.c,v 1.1.2.2 2009/09/16 13:38:05 yamt Exp $	*/
      2  1.1.2.2  yamt 
      3  1.1.2.2  yamt /*
      4  1.1.2.2  yamt  * Copyright (c) 2009 Antti Kantee.  All Rights Reserved.
      5  1.1.2.2  yamt  *
      6  1.1.2.2  yamt  * Redistribution and use in source and binary forms, with or without
      7  1.1.2.2  yamt  * modification, are permitted provided that the following conditions
      8  1.1.2.2  yamt  * are met:
      9  1.1.2.2  yamt  * 1. Redistributions of source code must retain the above copyright
     10  1.1.2.2  yamt  *    notice, this list of conditions and the following disclaimer.
     11  1.1.2.2  yamt  * 2. Redistributions in binary form must reproduce the above copyright
     12  1.1.2.2  yamt  *    notice, this list of conditions and the following disclaimer in the
     13  1.1.2.2  yamt  *    documentation and/or other materials provided with the distribution.
     14  1.1.2.2  yamt  *
     15  1.1.2.2  yamt  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
     16  1.1.2.2  yamt  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     17  1.1.2.2  yamt  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     18  1.1.2.2  yamt  * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     19  1.1.2.2  yamt  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     20  1.1.2.2  yamt  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
     21  1.1.2.2  yamt  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     22  1.1.2.2  yamt  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     23  1.1.2.2  yamt  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     24  1.1.2.2  yamt  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     25  1.1.2.2  yamt  * SUCH DAMAGE.
     26  1.1.2.2  yamt  */
     27  1.1.2.2  yamt 
     28  1.1.2.2  yamt #include <sys/cdefs.h>
     29  1.1.2.2  yamt __KERNEL_RCSID(0, "$NetBSD: devnodes.c,v 1.1.2.2 2009/09/16 13:38:05 yamt Exp $");
     30  1.1.2.2  yamt 
     31  1.1.2.2  yamt #include <sys/param.h>
     32  1.1.2.2  yamt #include <sys/device.h>
     33  1.1.2.2  yamt #include <sys/filedesc.h>
     34  1.1.2.2  yamt #include <sys/kmem.h>
     35  1.1.2.2  yamt #include <sys/lwp.h>
     36  1.1.2.2  yamt #include <sys/stat.h>
     37  1.1.2.2  yamt #include <sys/vfs_syscalls.h>
     38  1.1.2.2  yamt 
     39  1.1.2.2  yamt #include "rump_vfs_private.h"
     40  1.1.2.2  yamt 
     41  1.1.2.2  yamt /* realqvik(tm) "devfs" */
     42  1.1.2.2  yamt int
     43  1.1.2.2  yamt rump_vfs_makedevnodes(dev_t devtype, const char *basename, char minchar,
     44  1.1.2.2  yamt 	devmajor_t maj, devminor_t minnum, int nnodes)
     45  1.1.2.2  yamt {
     46  1.1.2.2  yamt 	int error;
     47  1.1.2.2  yamt 	char *devname, *p;
     48  1.1.2.2  yamt 	size_t devlen;
     49  1.1.2.2  yamt 	register_t retval;
     50  1.1.2.2  yamt 
     51  1.1.2.2  yamt 	error = do_sys_mkdir("/dev", 0777, UIO_SYSSPACE);
     52  1.1.2.2  yamt 	if (error != 0 && error != EEXIST)
     53  1.1.2.2  yamt 		return error;
     54  1.1.2.2  yamt 
     55  1.1.2.2  yamt 	devlen = strlen("/dev/") + strlen(basename) + 1 + 1; /* +letter +0 */
     56  1.1.2.2  yamt 	devname = kmem_zalloc(devlen, KM_SLEEP);
     57  1.1.2.2  yamt 	strlcpy(devname, "/dev/", devlen);
     58  1.1.2.2  yamt 	strlcat(devname, basename, devlen);
     59  1.1.2.2  yamt 	p = devname + devlen-2;
     60  1.1.2.2  yamt 
     61  1.1.2.2  yamt 	for (; nnodes > 0; nnodes--, minchar++, minnum++) {
     62  1.1.2.2  yamt 		KASSERT(minchar <= 'z');
     63  1.1.2.2  yamt 		*p = minchar;
     64  1.1.2.2  yamt 
     65  1.1.2.2  yamt 		if ((error = do_sys_mknod(curlwp, devname, 0666 | devtype,
     66  1.1.2.2  yamt 		    makedev(maj, minnum), &retval, UIO_SYSSPACE)))
     67  1.1.2.2  yamt 			goto out;
     68  1.1.2.2  yamt 	}
     69  1.1.2.2  yamt 
     70  1.1.2.2  yamt  out:
     71  1.1.2.2  yamt 	kmem_free(devname, devlen);
     72  1.1.2.2  yamt 	return error;
     73  1.1.2.2  yamt }
     74