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 2003 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 <stdio.h> 31 #include <strings.h> 32 #include <stdlib.h> 33 #include <limits.h> 34 #include <ctype.h> 35 36 #define SGEN_LINK_RE "^scsi/.+/c[0-9]+t[0-9A-F]+d[0-9]+$" 37 #define SGEN_DIR "scsi" 38 #define SGEN_CLASS "generic-scsi" 39 40 static int sgen_callback(di_minor_t minor, di_node_t node); 41 static char *find_ctrlr(di_node_t node, di_minor_t minor); 42 43 44 static devfsadm_create_t sgen_create_cbt[] = { 45 { SGEN_CLASS, "ddi_generic:scsi", NULL, 46 TYPE_EXACT | CREATE_DEFER, ILEVEL_0, sgen_callback 47 } 48 }; 49 50 DEVFSADM_CREATE_INIT_V0(sgen_create_cbt); 51 52 /* 53 * HOT auto cleanup of sgen links not desired. 54 */ 55 static devfsadm_remove_t sgen_remove_cbt[] = { 56 { SGEN_CLASS, SGEN_LINK_RE, RM_POST, 57 ILEVEL_0, devfsadm_rm_all 58 } 59 }; 60 61 DEVFSADM_REMOVE_INIT_V0(sgen_remove_cbt); 62 63 static int 64 sgen_callback(di_minor_t minor, di_node_t node) 65 { 66 char *baddr, *cnum, *tstr; 67 char lpath[PATH_MAX], buf[PATH_MAX]; 68 uchar_t *wwn; 69 70 if ((cnum = find_ctrlr(node, minor)) == NULL) 71 goto done; 72 73 if (di_prop_lookup_strings(DDI_DEV_T_ANY, node, 74 "client-guid", (char **)&wwn) > 0) { 75 /* 76 * MPXIO-enabled devices; lun is always 0. 77 */ 78 if (strlcpy((char *)buf, (char *)wwn, sizeof (buf)) >= 79 sizeof (buf)) 80 goto done; 81 82 for (tstr = buf; *tstr != '\0'; tstr++) { 83 *tstr = toupper(*tstr); 84 } 85 if (snprintf(lpath, sizeof (lpath), "%s/%s/c%st%sd0", SGEN_DIR, 86 di_minor_name(minor), cnum, buf) >= sizeof (lpath)) 87 goto done; 88 89 } else if (di_prop_lookup_bytes(DDI_DEV_T_ANY, node, 90 "port-wwn", &wwn) == 8) { 91 /* 92 * "normal" fibre channel devices 93 */ 94 int lun, *lunp, count; 95 if (di_prop_lookup_ints(DDI_DEV_T_ANY, node, "lun", &lunp) > 0) 96 lun = *lunp; 97 else 98 lun = 0; 99 100 for (count = 0, tstr = buf; count < 8; count++, tstr += 2) 101 (void) sprintf(tstr, "%02X", wwn[count]); 102 103 *tstr = '\0'; 104 if (snprintf(lpath, sizeof (lpath), "%s/%s/c%st%sd%d", SGEN_DIR, 105 di_minor_name(minor), cnum, buf, lun) >= sizeof (lpath)) 106 goto done; 107 } else { 108 /* 109 * Parallel SCSI devices 110 */ 111 uint_t targ, lun; 112 113 if ((baddr = di_bus_addr(node)) == NULL) 114 goto done; 115 116 if (sscanf(baddr, "%X,%X", &targ, &lun) != 2) 117 goto done; 118 119 if (snprintf(lpath, sizeof (lpath), "%s/%s/c%st%dd%d", SGEN_DIR, 120 di_minor_name(minor), cnum, targ, lun) >= sizeof (lpath)) 121 goto done; 122 } 123 124 (void) devfsadm_mklink(lpath, node, minor, 0); 125 done: 126 free(cnum); 127 return (DEVFSADM_CONTINUE); 128 } 129 130 /* index of enumeration rule applicable to this module */ 131 #define RULE_INDEX 2 132 133 static char * 134 find_ctrlr(di_node_t node, di_minor_t minor) 135 { 136 char path[PATH_MAX + 1]; 137 char *devfspath; 138 char *buf, *mn; 139 140 devfsadm_enumerate_t rules[3] = { 141 {"^r?dsk$/^c([0-9]+)", 1, MATCH_PARENT}, 142 {"^cfg$/^c([0-9]+)$", 1, MATCH_ADDR}, 143 {"^scsi$/^.+$/^c([0-9]+)", 1, MATCH_PARENT} 144 }; 145 146 mn = di_minor_name(minor); 147 148 if ((devfspath = di_devfs_path(node)) == NULL) { 149 return (NULL); 150 } 151 (void) strcpy(path, devfspath); 152 (void) strcat(path, ":"); 153 (void) strcat(path, mn); 154 di_devfs_path_free(devfspath); 155 156 /* 157 * Use controller (parent) component of device path 158 */ 159 if (disk_enumerate_int(path, RULE_INDEX, &buf, rules, 3) == 160 DEVFSADM_MULTIPLE) { 161 162 /* 163 * We failed because there are multiple logical controller 164 * numbers for a single physical controller. If we use node 165 * name also for DEVICE paths in the match it should fix this 166 * and only find one logical controller. (See 4045879). 167 * NOTE: Rules for controllers are not changed, as there is 168 * no unique controller number for them in this case. 169 * 170 * MATCH_UNCACHED flag is private to the "disks" and "sgen" 171 * modules. NOT to be used by other modules. 172 */ 173 rules[0].flags = MATCH_NODE | MATCH_UNCACHED; /* disks */ 174 rules[2].flags = MATCH_NODE | MATCH_UNCACHED; /* generic scsi */ 175 if (devfsadm_enumerate_int(path, RULE_INDEX, &buf, rules, 3)) { 176 return (NULL); 177 } 178 } 179 180 return (buf); 181 } 182