usr/src/lib/mpapi/libmpscsi_vhci/common/MP_GetMPLogicalUnitProperties.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  * Copyright (c) 2006, 2010, Oracle and/or its affiliates. All rights reserved.
  23  */
  24
  25 #include <string.h>
  26 #include <syslog.h>
  27 #include <errno.h>
  28 #include <unistd.h>
  29 #include <stropts.h>
  30
  31 #include <libdevinfo.h>
  32
  33 #include "mp_utils.h"
  34
  35
  36 typedef struct walk_devlink {
  37         char *path;
  38         size_t len;
  39         char **linkpp;
  40 } walk_devlink_t;
  41
  42
  43
  44 static int
  45 get_devlink(di_devlink_t devlink, void *arg) {
  46
  47         walk_devlink_t *warg = (walk_devlink_t *)arg;
  48
  49
  50         log(LOG_INFO, "get_devlink()", " - enter");
  51
  52
  53         *(warg->linkpp) = strdup(di_devlink_path(devlink));
  54
  55
  56         log(LOG_INFO, "get_devlink()", " - exit");
  57
  58         return (DI_WALK_TERMINATE);
  59 }
  60
  61
  62 char
  63 *getDeviceFileName(MP_UINT64 objectSequenceNumber)
  64 {
  65         char *deviceFileName = NULL;
  66
  67         di_node_t root_node = DI_NODE_NIL;
  68         di_node_t cur_node  = DI_NODE_NIL;
  69
  70         int instNum;
  71         int majorNum;
  72         MP_UINT64 osn;
  73
  74         char *pathName  = NULL;
  75         char *minorName = "c,raw";
  76         char *devLink   = NULL;
  77
  78         char fullName[512];
  79
  80         walk_devlink_t warg;
  81         di_devlink_handle_t dlHandle = NULL;
  82
  83         int diStatus = 0;
  84
  85
  86         log(LOG_INFO, "getDeviceFileName()", " - enter");
  87
  88         log(LOG_INFO, "getDeviceFileName()",
  89             " - objectSequenceNumber: %llx",
  90             objectSequenceNumber);
  91
  92         root_node = di_init("/", DINFOCACHE);
  93         if (DI_NODE_NIL == root_node) {
  94                 log(LOG_INFO, "MP_GetMultipathLusPlugin()",
  95                     " - $ERROR, di_init() failed");
  96
  97                 return (NULL);
  98         }
  99
 100
 101         cur_node = di_drv_first_node("scsi_vhci", root_node);
 102         if (DI_NODE_NIL == cur_node) {
 103                 log(LOG_INFO, "getDeviceFileName()",
 104                     " - $ERROR, di_drv_first_node() failed");
 105
 106                 di_fini(root_node);
 107
 108                 return (NULL);
 109         }
 110
 111
 112         cur_node = di_child_node(cur_node);
 113
 114         while (DI_NODE_NIL != cur_node) {
 115
 116                 instNum = di_instance(cur_node);
 117                 majorNum = di_driver_major(cur_node);
 118
 119                 osn = 0;
 120                 osn = MP_STORE_INST_TO_ID(instNum, osn);
 121                 osn = MP_STORE_MAJOR_TO_ID(majorNum, osn);
 122
 123                 if (osn == objectSequenceNumber) {
 124
 125                         log(LOG_INFO, "getDeviceFileName()",
 126                             " - found node.");
 127
 128                         break;
 129                 }
 130
 131                 cur_node = di_sibling_node(cur_node);
 132         }
 133
 134         if (DI_NODE_NIL != cur_node) {
 135
 136                 dlHandle = di_devlink_init(NULL, 0);
 137                 if (NULL == dlHandle) {
 138                         log(LOG_INFO, "getDeviceFileName()",
 139                             " - $ERROR, di_devlink_init() failed.");
 140
 141                         di_fini(root_node);
 142
 143                         return (NULL);
 144                 }
 145
 146                 pathName = di_devfs_path(cur_node);
 147
 148                 (void) snprintf(fullName, 511, "%s:%s", pathName, minorName);
 149
 150                 log(LOG_INFO, "getDeviceFileName()",
 151                     " - fullName: {%s]", fullName);
 152
 153                 (void) memset(&warg, 0, sizeof (walk_devlink_t));
 154
 155                 devLink  = NULL;
 156                 warg.linkpp = &devLink;
 157
 158                 diStatus = di_devlink_walk(dlHandle,
 159                     NULL,
 160                     fullName,
 161                     DI_PRIMARY_LINK,
 162                     (void *)&warg,
 163                     get_devlink);
 164
 165                 if (diStatus != 0) {
 166
 167                         log(LOG_INFO, "getDeviceFileName()",
 168                             "diStatus: %d", diStatus);
 169
 170                         if (diStatus < 0) {
 171                                 diStatus = errno;
 172                         }
 173
 174                         log(LOG_INFO, "getDeviceFileName()",
 175                             "diStatus: %d", diStatus);
 176
 177                         log(LOG_INFO, "getDeviceFileName()",
 178                             "strerror(diStatus): %s", strerror(diStatus));
 179                 }
 180
 181                 if (NULL != devLink) {
 182
 183                         deviceFileName =
 184                             (char *)calloc(1, strlen(devLink) + 1);
 185
 186                         (void) strncpy(deviceFileName, devLink,
 187                             strlen(devLink));
 188
 189                 } else {
 190
 191                         log(LOG_INFO, "getDeviceFileName()",
 192                             " - $ERROR, devLink is NULL.");
 193
 194                         deviceFileName =
 195                             (char *)calloc(1, 256);
 196
 197                         (void) strncpy(deviceFileName, pathName, 255);
 198                 }
 199
 200                 di_devfs_path_free(pathName);
 201
 202                 (void) di_devlink_fini(&dlHandle);
 203
 204         }
 205
 206
 207         di_fini(root_node);
 208
 209         free(devLink);
 210
 211         log(LOG_INFO, "getDeviceFileName()", " - exit");
 212
 213         return (deviceFileName);
 214 }
 215
 216
 217
 218 MP_STATUS
 219 MP_GetMPLogicalUnitProperties(MP_OID oid,
 220                                 MP_MULTIPATH_LOGICAL_UNIT_PROPERTIES *pProps)
 221 {
 222         mp_iocdata_t            mp_ioctl;
 223         mp_logical_unit_prop_t  luInfo;
 224
 225         MP_OID overridePathOID;
 226
 227         int ioctlStatus = 0;
 228
 229         int vendorLength   = 0;
 230         int productLength  = 0;
 231         int revisionLength = 0;
 232
 233         char *deviceFileName = NULL;
 234
 235
 236         MP_STATUS mpStatus = MP_STATUS_SUCCESS;
 237
 238
 239         log(LOG_INFO, "MP_GetMPLogicalUnitProperties()", " - enter");
 240
 241
 242         log(LOG_INFO, "MP_GetMPLogicalUnitProperties()",
 243             "oid.objectSequenceNumber = %llx",
 244             oid.objectSequenceNumber);
 245
 246         if (g_scsi_vhci_fd < 0) {
 247                 log(LOG_INFO, "MP_GetMPLogicalUnitProperties()",
 248                     "invalid driver file handle");
 249                 log(LOG_INFO, "MP_GetMPLogicalUnitProperties()",
 250                     " - error exit");
 251                 return (MP_STATUS_FAILED);
 252         }
 253
 254         (void) memset(&mp_ioctl, 0, sizeof (mp_iocdata_t));
 255         (void) memset(&luInfo,   0, sizeof (mp_logical_unit_prop_t));
 256
 257         mp_ioctl.mp_cmd  = MP_GET_LU_PROP;
 258         mp_ioctl.mp_ibuf = (caddr_t)&oid.objectSequenceNumber;
 259         mp_ioctl.mp_ilen = sizeof (oid.objectSequenceNumber);
 260         mp_ioctl.mp_obuf = (caddr_t)&luInfo;
 261         mp_ioctl.mp_olen = sizeof (mp_logical_unit_prop_t);
 262         mp_ioctl.mp_xfer = MP_XFER_READ;
 263
 264         ioctlStatus = ioctl(g_scsi_vhci_fd, MP_CMD, &mp_ioctl);
 265
 266         log(LOG_INFO, "MP_GetMPLogicalUnitProperties()",
 267             " IOCTL call returned: %d", ioctlStatus);
 268
 269         if (ioctlStatus < 0) {
 270                 ioctlStatus = errno;
 271         }
 272
 273         if (ioctlStatus != 0) {
 274                 log(LOG_INFO, "MP_GetMPLogicalUnitProperties()",
 275                     "IOCTL call failed.  IOCTL error is: %d",
 276                     ioctlStatus);
 277                 log(LOG_INFO, "MP_GetMPLogicalUnitProperties()",
 278                     "IOCTL call failed.  IOCTL error is: %s",
 279                     strerror(ioctlStatus));
 280                 log(LOG_INFO, "MP_GetMPLogicalUnitProperties()",
 281                     "IOCTL call failed.  mp_ioctl.mp_errno: %x",
 282                     mp_ioctl.mp_errno);
 283
 284                 if (ENOTSUP == ioctlStatus) {
 285                         mpStatus = MP_STATUS_UNSUPPORTED;
 286                 } else if (0 == mp_ioctl.mp_errno) {
 287                         mpStatus = MP_STATUS_FAILED;
 288                 } else {
 289                         mpStatus = getStatus4ErrorCode(mp_ioctl.mp_errno);
 290                 }
 291
 292                 log(LOG_INFO, "MP_GetMPLogicalUnitProperties()",
 293                     " - error exit");
 294
 295                 return (mpStatus);
 296         }
 297
 298         (void) memset(pProps, 0, sizeof (MP_MULTIPATH_LOGICAL_UNIT_PROPERTIES));
 299
 300         pProps->asymmetric = luInfo.asymmetric;
 301         pProps->autoFailbackEnabled = luInfo.autoFailbackEnabled;
 302         pProps->autoProbingEnabled = luInfo.autoProbingEnabled;
 303         pProps->currentFailbackPollingRate = luInfo.currentFailBackPollingRate;
 304         pProps->currentLoadBalanceType = luInfo.currentLoadBalanceType;
 305         pProps->currentProbingPollingRate = luInfo.currentProbingPollingRate;
 306
 307
 308         deviceFileName = getDeviceFileName(oid.objectSequenceNumber);
 309
 310         if (NULL != deviceFileName) {
 311
 312                 log(LOG_INFO, "MP_GetMPLogicalUnitProperties()",
 313                     "deviceFileName: %s",
 314                     deviceFileName);
 315
 316                 (void) strncpy(pProps->deviceFileName,
 317                     deviceFileName,
 318                     sizeof (pProps->deviceFileName) - 1);
 319
 320                 free(deviceFileName);
 321         }
 322
 323         pProps->failbackPollingRateMax = luInfo.failbackPollingRateMax;
 324         pProps->logicalUnitGroupID = luInfo.luGroupID;
 325
 326         (void) strncpy(pProps->name, luInfo.name, sizeof (pProps->name) - 1);
 327
 328         pProps->nameType = luInfo.nameType;
 329
 330         overridePathOID.objectSequenceNumber = luInfo.overridePathID;
 331         overridePathOID.objectType = MP_OBJECT_TYPE_PATH_LU;
 332         overridePathOID.ownerId = g_pluginOwnerID;
 333         (void) memcpy(&pProps->overridePath, &overridePathOID, sizeof (MP_OID));
 334
 335         pProps->probingPollingRateMax = luInfo.probingPollingRateMax;
 336
 337
 338         vendorLength   = sizeof (pProps->vendor);
 339         productLength  = sizeof (pProps->product);
 340         revisionLength = sizeof (pProps->revision);
 341
 342         (void) strncpy(pProps->vendor,
 343             luInfo.prodInfo.vendor,
 344             vendorLength);
 345
 346         (void) strncpy(pProps->product,
 347             luInfo.prodInfo.product,
 348             productLength);
 349
 350         (void) strncpy(pProps->revision,
 351             luInfo.prodInfo.revision,
 352             revisionLength);
 353
 354         log(LOG_INFO, "MP_GetMPLogicalUnitProperties()", " - exit");
 355
 356         return (MP_STATUS_SUCCESS);
 357 }