Home | History | Annotate | Line # | Download | only in libzfs 
      1 /*	$NetBSD: zfs_component.c,v 1.3 2019/05/07 08:51:09 hannken 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: zfs_component.c,v 1.3 2019/05/07 08:51:09 hannken Exp $");
     30 
     31 #include <sys/param.h>
     32 #include <sys/conf.h>
     33 #include <sys/device.h>
     34 #include <sys/stat.h>
     35 
     36 #include <rump-sys/kern.h>
     37 #include <rump-sys/vfs.h>
     38 
     39 RUMP_COMPONENT(RUMP_COMPONENT_VFS)
     40 {
     41 	extern const struct bdevsw zfs_bdevsw;
     42 	extern const struct cdevsw zfs_cdevsw;
     43 	devmajor_t bmaj, cmaj;
     44 	int error, exist;
     45 
     46 	/* go, mydevfs */
     47 	bmaj = cmaj = -1;
     48 
     49 	if ((error = devsw_attach("zfs", &zfs_bdevsw, &bmaj,
     50 	    &zfs_cdevsw, &cmaj)) != 0 && error != EEXIST)
     51 		panic("cannot attach zfs: %d", error);
     52 	exist = (error == EEXIST);
     53 
     54 	if ((error = rump_vfs_makeonedevnode(S_IFCHR,
     55 	    "/dev/zfs", cmaj, 0)) != 0)
     56 		panic("cannot create zfs dev nodes: %d", error);
     57 
     58 	if (!exist)
     59 		devsw_detach(&zfs_bdevsw, &zfs_cdevsw);
     60 }
     61