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 2004 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 <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/mkdev.h> 36 37 #define MD_LINK_RE_DEVICES "^md/r?dsk/d[0-9]+$" 38 #define MD_LINK_RE_SHARED "^md/shared/[0-9]+/r?dsk/d[0-9]+$" 39 #define MD_LINK_RE_ADMIN "^md/admin" 40 41 /* 42 * The devfsadm link module require the next section to 43 * be defined in order to know what and when to call functions 44 * in the module on device creation and removal. 45 */ 46 47 /* setup for device creation */ 48 49 static int md_create(di_minor_t minor, di_node_t node); 50 51 static devfsadm_create_t md_cbt[] = { 52 { "pseudo", "ddi_pseudo", "md", 53 TYPE_EXACT | DRV_EXACT, ILEVEL_0, md_create, 54 }, 55 }; 56 57 DEVFSADM_CREATE_INIT_V0(md_cbt); 58 59 /* 60 * remove devices - always allow disks to be dynamically removed. Only allow 61 * admin device to be removed at reboot. 62 */ 63 64 static devfsadm_remove_t md_remove_cbt[] = { 65 {"pseudo", MD_LINK_RE_DEVICES, RM_ALWAYS | RM_PRE | RM_HOT, 66 ILEVEL_0, devfsadm_rm_all}, 67 {"pseudo", MD_LINK_RE_SHARED, RM_ALWAYS | RM_PRE | RM_HOT, 68 ILEVEL_0, devfsadm_rm_all}, 69 {"pseudo", MD_LINK_RE_ADMIN, RM_ALWAYS | RM_PRE, 70 ILEVEL_0, devfsadm_rm_all}, 71 }; 72 73 DEVFSADM_REMOVE_INIT_V0(md_remove_cbt); 74 75 76 /* 77 * For the admin device: 78 * /dev/md/admin -> /devices/pseudo/md@0:admin 79 * 80 * For each other device 81 * /dev/md/dsk/dN -> /devices/pseudo/md@0:0,N,blk 82 * /dev/md/rdsk/dN -> /devices/pseudo/md@0:0,N,raw 83 * /dev/md/shared/M/dsk/dN /devices/pseudo/md@0:M,N,blk 84 * /dev/md/shared/M/rdsk/dN /devices/pseudo/md@0:M,N,raw 85 */ 86 static int 87 md_create(di_minor_t minor, di_node_t node) 88 { 89 char mn[MAXNAMELEN + 1]; 90 char path[PATH_MAX + 1]; 91 int set = -1, mdev = -1, ret; 92 char *type, *dir; 93 94 (void) strcpy(mn, di_minor_name(minor)); 95 96 /* 97 * Check whether we are being requested to setup the admin 98 * device link or one of the metadevice links. They need 99 * to be treated differently. 100 */ 101 102 if (strcmp(mn, "admin") == 0) { 103 /* there is only one admin link and always in /dev/md/admin */ 104 (void) devfsadm_mklink("md/admin", node, minor, 0); 105 } else { 106 /* 107 * Extract out the minor components and create the 108 * appropriate links. The node looks like: 109 * md@<set>,<mdev>,<type> 110 * where the <set> number is the named diskset, 111 * <mdev> is the metadevice number, and <type> 112 * is the trailing "blk" or "raw" indication. 113 * 114 * NOTE: when <set> is non-zero, we need to create 115 * under the "shared" directory entry instead of linking 116 * into the top level dsk/rdsk directories. 117 */ 118 ret = sscanf(mn, "%d,%d,", &set, &mdev); 119 if (ret == 2 && (type = strrchr(mn, ',')) != NULL) { 120 type ++; 121 if (strcmp(type, "blk") == 0) { 122 dir = "dsk"; 123 } else { 124 dir = "rdsk"; 125 } 126 if (set == 0) { 127 /* this is a simple md */ 128 (void) snprintf(path, sizeof (path), 129 "md/%s/d%d", dir, mdev); 130 } else { 131 /* this is a shared md */ 132 (void) snprintf(path, sizeof (path), 133 "md/shared/%d/%s/d%d", 134 set, dir, mdev); 135 } 136 (void) devfsadm_mklink(path, node, minor, 0); 137 } 138 } 139 return (DEVFSADM_CONTINUE); 140 } 141