usr/src/lib/sun_fc/common/Sun_fcScsiInquiryV2.cc

   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 2008 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25
  26
  27
  28 #include "Trace.h"
  29 #include "Handle.h"
  30 #include "HBA.h"
  31 #include "HBAPort.h"
  32 #include "Exceptions.h"
  33 #include "sun_fc.h"
  34 #include <unistd.h>
  35
  36 #define     BUSY_SLEEP          1000000 /* 1/100 second */
  37 #define     BUSY_RETRY_TIMER    5000000000ULL /* Retry for 5 seconds */
  38 #ifdef  __cplusplus
  39 extern "C" {
  40 #endif
  41
  42 /**
  43  * @memo            Send a SCSI inquiry to a remote WWN
  44  * @return          HBA_STATUS_OK or other error code
  45  *                  scsiStatus should be checked to ensure SCSI command
  46  *                  was a success.
  47  * @param           handle The HBA to operate on
  48  * @param           portWWN Indicates the HBA port to send command through
  49  * @param           targetPortWWN Indicates the target to send command to
  50  * @param           fcLun Indicates the target unit to send command to
  51  * @param           cdb1 The first CDB byte
  52  * @param           cdb2 The second CDB byte
  53  * @param           responseBuffer User-allocated response buffer
  54  * @param           responseSize Size of User-allocated response buffer
  55  * @param           scsiStatus User-allocated scsi status byte
  56  *
  57  * @doc             This routine will attempt a limited number of retries
  58  *                  When busy or again errors are encountered.
  59  */
  60 HBA_STATUS
  61 Sun_fcScsiInquiryV2(HBA_HANDLE handle, HBA_WWN portWWN, HBA_WWN targetPortWWN,
  62             HBA_UINT64 fcLun, HBA_UINT8 cdb1, HBA_UINT8 cdb2,
  63             void *responseBuffer, HBA_UINT32 *responseSize,
  64             HBA_UINT8 *scsiStatus,
  65             void *senseBuffer, HBA_UINT32 *senseSize) {
  66         Trace log("Sun_fcScsiInquiryV2");
  67
  68         hrtime_t start = gethrtime();
  69         hrtime_t end = start + BUSY_RETRY_TIMER;
  70         for (hrtime_t cur = start; cur < end; cur = gethrtime()) {
  71             try {
  72                 Handle *myHandle = Handle::findHandle(handle);
  73                 HBA *hba = myHandle->getHBA();
  74                 HBAPort *port = hba->getPort(wwnConversion(portWWN.wwn));
  75
  76                 port->sendScsiInquiry(wwnConversion(targetPortWWN.wwn), fcLun,
  77                         cdb1, cdb2, responseBuffer, responseSize,
  78                         scsiStatus, senseBuffer, senseSize);
  79                 return (HBA_STATUS_OK);
  80             } catch (BusyException &e) {
  81                 usleep(BUSY_SLEEP);
  82                 continue;
  83             } catch (TryAgainException &e) {
  84                 usleep(BUSY_SLEEP);
  85                 continue;
  86             } catch (HBAException &e) {
  87                 return (e.getErrorCode());
  88             } catch (...) {
  89                 log.internalError(
  90                     "Uncaught exception");
  91                 return (HBA_STATUS_ERROR);
  92             }
  93         }
  94 }
  95 #ifdef  __cplusplus
  96 }
  97 #endif