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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 /*
     23  * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
     24  * Use is subject to license terms.
     25  */
     26 
     27 #pragma ident	"%Z%%M%	%I%	%E% SMI"
     28 
     29 #include <devfsadm.h>
     30 #include <strings.h>
     31 #include <stdlib.h>
     32 #include <limits.h>
     33 #include <bsm/devalloc.h>
     34 
     35 #define	SMP_LINK_RE	"^smp/expd[0-9]+$"
     36 #define	SMP_CLASS	"sas"
     37 #define	SMP_DRV_NAME	"smp"
     38 
     39 static int smp_callback(di_minor_t minor, di_node_t node);
     40 
     41 static devfsadm_create_t smp_create_cbt[] = {
     42 	{ SMP_CLASS, "ddi_sas_smp", SMP_DRV_NAME,
     43 	    TYPE_EXACT | DRV_EXACT, ILEVEL_0, smp_callback
     44 	}
     45 };
     46 
     47 DEVFSADM_CREATE_INIT_V0(smp_create_cbt);
     48 
     49 /*
     50  * HOT auto cleanup of smp links not desired.
     51  */
     52 static devfsadm_remove_t smp_remove_cbt[] = {
     53 	{ SMP_CLASS, SMP_LINK_RE, RM_PRE,
     54 		ILEVEL_0, devfsadm_rm_all
     55 	}
     56 };
     57 
     58 DEVFSADM_REMOVE_INIT_V0(smp_remove_cbt);
     59 
     60 /*
     61  * Create link for expander devices as form
     62  * dev/smp/expd0 -> ../../devices/pci@0,0/.../smp@w5001636000005aff:smp
     63  */
     64 static int
     65 smp_callback(di_minor_t minor, di_node_t node)
     66 {
     67 	char l_path[PATH_MAX + 1];
     68 	char *buf;
     69 	char *mn;
     70 	char *devfspath;
     71 	devfsadm_enumerate_t rules[1] = {"smp/expd([0-9]+)", 1, MATCH_ADDR};
     72 
     73 	mn = di_minor_name(minor);
     74 
     75 	devfspath = di_devfs_path(node);
     76 
     77 	(void) strcpy(l_path, devfspath);
     78 	(void) strcat(l_path, ":");
     79 	(void) strcat(l_path, mn);
     80 
     81 	di_devfs_path_free(devfspath);
     82 
     83 	if (devfsadm_enumerate_int(l_path, 0, &buf, rules, 1)) {
     84 		return (DEVFSADM_CONTINUE);
     85 	}
     86 
     87 	(void) strcpy(l_path, "smp/expd");
     88 	(void) strcat(l_path, buf);
     89 	free(buf);
     90 
     91 	(void) devfsadm_mklink(l_path, node, minor, 0);
     92 
     93 	return (DEVFSADM_CONTINUE);
     94 }
     95