Home | History | Annotate | Download | only in devfsadm
      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 2006 Sun Microsystems, Inc.  All rights reserved.
     23  * Use is subject to license terms.
     24  */
     25 
     26 #pragma ident	"%Z%%M%	%I%	%E% SMI"
     27 
     28 #include <regex.h>
     29 #include <devfsadm.h>
     30 #include <stdio.h>
     31 #include <strings.h>
     32 #include <stdlib.h>
     33 #include <limits.h>
     34 #include <sys/mkdev.h>
     35 #include <sys/lofi.h>
     36 
     37 
     38 static int lofi(di_minor_t minor, di_node_t node);
     39 static int lofi_rm_all(char *link);
     40 
     41 /*
     42  * devfs create callback register
     43  */
     44 static devfsadm_create_t lofi_create_cbt[] = {
     45 	{ "pseudo", "ddi_pseudo", LOFI_DRIVER_NAME,
     46 	    TYPE_EXACT | DRV_EXACT, ILEVEL_0, lofi,
     47 	},
     48 };
     49 DEVFSADM_CREATE_INIT_V0(lofi_create_cbt);
     50 
     51 /*
     52  * devfs cleanup register
     53  */
     54 static devfsadm_remove_V1_t lofi_remove_cbt[] = {
     55 	{"pseudo", "^r?lofi/[0-9]+$", RM_ALWAYS | RM_PRE | RM_HOT,
     56 	    ILEVEL_0, lofi_rm_all},
     57 };
     58 DEVFSADM_REMOVE_INIT_V1(lofi_remove_cbt);
     59 
     60 /*
     61  * Wrapper around devfsadm_rm_all() that allows termination of remove
     62  * process
     63  */
     64 static int
     65 lofi_rm_all(char *link)
     66 {
     67 	devfsadm_rm_all(link);
     68 	return (DEVFSADM_TERMINATE);
     69 }
     70 
     71 
     72 /*
     73  * For the master device:
     74  *	/dev/lofictl -> /devices/pseudo/lofi@0:ctl
     75  * For each other device
     76  *	/dev/lofi/1 -> /devices/pseudo/lofi@0:1
     77  *	/dev/rlofi/1 -> /devices/pseudo/lofi@0:1,raw
     78  */
     79 static int
     80 lofi(di_minor_t minor, di_node_t node)
     81 {
     82 	dev_t	dev;
     83 	char mn[MAXNAMELEN + 1];
     84 	char blkname[MAXNAMELEN + 1];
     85 	char rawname[MAXNAMELEN + 1];
     86 	char path[PATH_MAX + 1];
     87 
     88 	(void) strcpy(mn, di_minor_name(minor));
     89 
     90 	if (strcmp(mn, "ctl") == 0) {
     91 		(void) devfsadm_mklink(LOFI_CTL_NAME, node, minor, 0);
     92 	} else {
     93 		dev = di_minor_devt(minor);
     94 		(void) snprintf(blkname, sizeof (blkname), "%d",
     95 		    (int)minor(dev));
     96 		(void) snprintf(rawname, sizeof (rawname), "%d,raw",
     97 		    (int)minor(dev));
     98 
     99 		if (strcmp(mn, blkname) == 0) {
    100 			(void) snprintf(path, sizeof (path), "%s/%s",
    101 			    LOFI_BLOCK_NAME, blkname);
    102 		} else if (strcmp(mn, rawname) == 0) {
    103 			(void) snprintf(path, sizeof (path), "%s/%s",
    104 			    LOFI_CHAR_NAME, blkname);
    105 		} else {
    106 			return (DEVFSADM_CONTINUE);
    107 		}
    108 
    109 		(void) devfsadm_mklink(path, node, minor, 0);
    110 	}
    111 	return (DEVFSADM_CONTINUE);
    112 }
    113