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 <devfsadm.h>
     29 #include <strings.h>
     30 #include <stdlib.h>
     31 #include <limits.h>
     32 #include <bsm/devalloc.h>
     33 
     34 extern int system_labeled;
     35 
     36 static int tape_process(di_minor_t minor, di_node_t node);
     37 
     38 static devfsadm_create_t tape_cbt[] = {
     39 	{ "tape", "ddi_byte:tape", NULL,
     40 	TYPE_EXACT, ILEVEL_0,	tape_process
     41 	},
     42 };
     43 
     44 DEVFSADM_CREATE_INIT_V0(tape_cbt);
     45 
     46 #define	TAPE_LINK_RE "^rmt/[0-9]+[cbhlmnu]*"
     47 
     48 static devfsadm_remove_t tape_remove_cbt[] = {
     49 	{ "tape", TAPE_LINK_RE, RM_PRE, ILEVEL_0, devfsadm_rm_all
     50 	}
     51 };
     52 
     53 DEVFSADM_REMOVE_INIT_V0(tape_remove_cbt);
     54 
     55 
     56 /*
     57  * This function is called for every tape minor node.
     58  * Calls enumerate to assign a logical tape id, and then
     59  * devfsadm_mklink to make the link.
     60  */
     61 static int
     62 tape_process(di_minor_t minor, di_node_t node)
     63 {
     64 	int flags = 0;
     65 	char l_path[PATH_MAX + 1];
     66 	char *buf;
     67 	char *mn;
     68 	char *devfspath;
     69 	devfsadm_enumerate_t rules[1] = {"rmt/([0-9]+)", 1, MATCH_ADDR};
     70 
     71 	mn = di_minor_name(minor);
     72 
     73 
     74 	if ((mn != NULL) && (*mn >= '0') && (*mn <= '9')) {
     75 		/*
     76 		 * first character cannot be a digit as it would combine
     77 		 * with the tape instance number to make an ambiguous quantity.
     78 		 */
     79 		return (DEVFSADM_CONTINUE);
     80 	}
     81 
     82 	devfspath = di_devfs_path(node);
     83 
     84 	(void) strcpy(l_path, devfspath);
     85 	(void) strcat(l_path, ":");
     86 	(void) strcat(l_path, mn);
     87 
     88 	di_devfs_path_free(devfspath);
     89 
     90 	/*
     91 	 *  devfsadm_enumerate finds the logical tape id from the physical path,
     92 	 *  omitting minor name field. The logical tape id is returned in buf.
     93 	 */
     94 	if (devfsadm_enumerate_int(l_path, 0, &buf, rules, 1)) {
     95 		return (DEVFSADM_CONTINUE);
     96 	}
     97 
     98 	(void) strcpy(l_path, "rmt/");
     99 	(void) strcat(l_path, buf);
    100 	(void) strcat(l_path, mn);
    101 	free(buf);
    102 
    103 	if (system_labeled)
    104 		flags = DA_ADD|DA_TAPE;
    105 
    106 	(void) devfsadm_mklink(l_path, node, minor, flags);
    107 
    108 	return (DEVFSADM_CONTINUE);
    109 }
    110