usr/src/cmd/devfsadm/smp_link.c

   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 }