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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, Version 1.0 only
      6  * (the "License").  You may not use this file except in compliance
      7  * with the License.
      8  *
      9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
     10  * or http://www.opensolaris.org/os/licensing.
     11  * See the License for the specific language governing permissions
     12  * and limitations under the License.
     13  *
     14  * When distributing Covered Code, include this CDDL HEADER in each
     15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
     16  * If applicable, add the following below this CDDL HEADER, with the
     17  * fields enclosed by brackets "[]" replaced with your own identifying
     18  * information: Portions Copyright [yyyy] [name of copyright owner]
     19  *
     20  * CDDL HEADER END
     21  */
     22 /*
     23  * Copyright (c) 2000-2001 by Sun Microsystems, Inc.
     24  * All rights reserved.
     25  */
     26 
     27 #pragma ident	"%Z%%M%	%I%	%E% SMI"
     28 
     29 #include <regex.h>
     30 #include <devfsadm.h>
     31 #include <stdio.h>
     32 #include <strings.h>
     33 #include <stdlib.h>
     34 #include <limits.h>
     35 #include <sys/fssnap_if.h>
     36 
     37 
     38 static int fssnap(di_minor_t minor, di_node_t node);
     39 
     40 static devfsadm_create_t fssnap_cbt[] = {
     41 	{ "pseudo", "ddi_pseudo", SNAP_NAME,
     42 	    TYPE_EXACT | DRV_EXACT, ILEVEL_0, fssnap,
     43 	},
     44 };
     45 
     46 DEVFSADM_CREATE_INIT_V0(fssnap_cbt);
     47 
     48 /*
     49  * For the master device:
     50  *	/dev/fssnapctl -> /devices/pseudo/fssnap@0:ctl
     51  * For each other device
     52  *	/dev/fssnap/1 -> /devices/pseudo/fssnap@0:1
     53  *	/dev/rfssnap/1 -> /devices/pseudo/fssnap@0:1,raw
     54  */
     55 static int
     56 fssnap(di_minor_t minor, di_node_t node)
     57 {
     58 	dev_t	dev;
     59 	char mn[MAXNAMELEN + 1];
     60 	char blkname[MAXNAMELEN + 1];
     61 	char rawname[MAXNAMELEN + 1];
     62 	char path[PATH_MAX + 1];
     63 
     64 	(void) strcpy(mn, di_minor_name(minor));
     65 
     66 	if (strcmp(mn, "ctl") == 0) {
     67 		(void) devfsadm_mklink(SNAP_CTL_NAME, node, minor, 0);
     68 	} else {
     69 		dev = di_minor_devt(minor);
     70 		(void) snprintf(blkname, sizeof (blkname), "%d",
     71 		    (int)minor(dev));
     72 		(void) snprintf(rawname, sizeof (rawname), "%d,raw",
     73 		    (int)minor(dev));
     74 
     75 		if (strcmp(mn, blkname) == 0) {
     76 			(void) snprintf(path, sizeof (path), "%s/%s",
     77 			    SNAP_BLOCK_NAME, blkname);
     78 		} else if (strcmp(mn, rawname) == 0) {
     79 			(void) snprintf(path, sizeof (path), "%s/%s",
     80 			    SNAP_CHAR_NAME, blkname);
     81 		} else {
     82 			return (DEVFSADM_CONTINUE);
     83 		}
     84 
     85 		(void) devfsadm_mklink(path, node, minor, 0);
     86 	}
     87 	return (DEVFSADM_CONTINUE);
     88 }
     89