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      1 /*
      2  * CDDL HEADER START
      3  *
      4  * The contents of this file are subject to the terms of the
      5  * Common Development and Distribution License (the "License").
      6  * You may not use this file except in compliance with the License.
      7  *
      8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
      9  * or http://www.opensolaris.org/os/licensing.
     10  * See the License for the specific language governing permissions
     11  * and limitations under the License.
     12  *
     13  * When distributing Covered Code, include this CDDL HEADER in each
     14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
     15  * If applicable, add the following below this CDDL HEADER, with the
     16  * fields enclosed by brackets "[]" replaced with your own identifying
     17  * information: Portions Copyright [yyyy] [name of copyright owner]
     18  *
     19  * CDDL HEADER END
     20  */
     21 /*
     22  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
     23  * Use is subject to license terms.
     24  */
     25 
     26 #include <regex.h>
     27 #include <devfsadm.h>
     28 #include <stdio.h>
     29 #include <strings.h>
     30 #include <stdlib.h>
     31 #include <limits.h>
     32 #include <sys/mkdev.h>
     33 #include <sys/fs/zfs.h>
     34 
     35 /* zfs name info */
     36 
     37 static int zfs(di_minor_t minor, di_node_t node);
     38 
     39 /*
     40  * devfs create callback register
     41  */
     42 static devfsadm_create_t zfs_create_cbt[] = {
     43 	{ "pseudo", "ddi_pseudo", ZFS_DRIVER,
     44 	    TYPE_EXACT | DRV_EXACT, ILEVEL_0, zfs,
     45 	},
     46 };
     47 DEVFSADM_CREATE_INIT_V0(zfs_create_cbt);
     48 
     49 /*
     50  * The zfs control node looks like this:
     51  *	/dev/zfs -> /devices/pseudo/zfs@0:zfs
     52  */
     53 static int
     54 zfs(di_minor_t minor, di_node_t node)
     55 {
     56 	char mn[MAXNAMELEN + 1];
     57 
     58 	(void) strcpy(mn, di_minor_name(minor));
     59 
     60 	if (strcmp(mn, ZFS_DRIVER) == 0) {
     61 		(void) devfsadm_mklink(ZFS_DRIVER, node, minor, 0);
     62 	}
     63 	return (DEVFSADM_CONTINUE);
     64 }
     65