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tap_component.c revision 1.2 
      1 /*	$NetBSD: tap_component.c,v 1.2 2015/08/20 12:20:09 christos Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2015 Wei Liu.  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: tap_component.c,v 1.2 2015/08/20 12:20:09 christos Exp $");
     30 
     31 #include <sys/param.h>
     32 #include <sys/device.h>
     33 #include <sys/stat.h>
     34 
     35 #include "rump_private.h"
     36 #include "rump_net_private.h"
     37 #include "rump_vfs_private.h"
     38 
     39 #include "ioconf.h"
     40 
     41 CFDRIVER_DECL(tap, DV_IFNET, NULL);
     42 
     43 RUMP_COMPONENT(RUMP_COMPONENT_NET_IF)
     44 {
     45 	extern const struct cdevsw tap_cdevsw;
     46 	devmajor_t bmaj, cmaj;
     47 	int error;
     48 
     49 	config_cfdriver_attach(&tap_cd);
     50 	tapattach(0);
     51 
     52 	bmaj = cmaj = NODEVMAJOR;
     53 	error = devsw_attach("tap", NULL, &bmaj, &tap_cdevsw, &cmaj);
     54 	if (error != 0)
     55 		panic("tap devsw attach failed: %d", error);
     56 
     57 	error = rump_vfs_makeonedevnode(S_IFCHR, "/dev/tap", cmaj, 0xfffff);
     58 	if (error != 0)
     59 		panic("cannot create tap device node: %d", error);
     60 
     61 	error = rump_vfs_makedevnodes(S_IFCHR, "/dev/tap", '0', cmaj, 0, 4);
     62 	if (error != 0)
     63 		panic("cannot create tap[0-4] device node: %d", error);
     64 }
     65