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 "HBA.h" 30 #include "HBAPort.h" 31 #include "Exceptions.h" 32 #include "sun_fc.h" 33 #include <unistd.h> 34 35 #define BUSY_SLEEP 1000 /* 1/100 second */ 36 #define BUSY_RETRY_TIMER 5000000000ULL /* Retry for 5 seconds */ 37 #ifdef __cplusplus 38 extern "C" { 39 #endif 40 41 /** 42 * @memo Send a read capacity to a remote WWN 43 * @return HBA_STATUS_OK or other error code 44 * scsiStatus should be checked to ensure SCSI command 45 * was a success. 46 * @param handle The HBA to operate on 47 * @param portWWN Indicates the HBA port to send command through 48 * @param targetPortWWN Indicates the target to send command to 49 * @param fcLun Indicates the target unit to send command to 50 * @param responseBuffer User-allocated response buffer 51 * @param responseSize Size of User-allocated response buffer 52 * @param scsiStatus User-allocated scsi status byte 53 * 54 * @doc This routine will attempt a limited number of retries 55 * When busy or again errors are encountered. 56 */ 57 HBA_STATUS 58 Sun_fcScsiReadCapacityV2(HBA_HANDLE handle, HBA_WWN portWWN, 59 HBA_WWN targetPortWWN, HBA_UINT64 fcLun, 60 void *responseBuffer, HBA_UINT32 *responseSize, 61 HBA_UINT8 *scsiStatus, 62 void *senseBuffer, HBA_UINT32 *senseSize) { 63 Trace log("Sun_fcScsiReadCapacityV2"); 64 65 hrtime_t start = gethrtime(); 66 hrtime_t end = start + BUSY_RETRY_TIMER; 67 for (hrtime_t cur = start; cur < end; cur = gethrtime()) { 68 try { 69 Handle *myHandle = Handle::findHandle(handle); 70 HBA *hba = myHandle->getHBA(); 71 HBAPort *port = hba->getPort(wwnConversion(portWWN.wwn)); 72 port->sendReadCapacity(wwnConversion(targetPortWWN.wwn), 73 fcLun, responseBuffer, responseSize, scsiStatus, 74 senseBuffer, senseSize); 75 return (HBA_STATUS_OK); 76 } catch (BusyException &e) { 77 usleep(BUSY_SLEEP); 78 continue; 79 } catch (TryAgainException &e) { 80 usleep(BUSY_SLEEP); 81 continue; 82 } catch (HBAException &e) { 83 return (e.getErrorCode()); 84 } catch (...) { 85 log.internalError( 86 "Uncaught exception"); 87 return (HBA_STATUS_ERROR); 88 } 89 } 90 return (HBA_STATUS_ERROR_TRY_AGAIN); 91 } 92 #ifdef __cplusplus 93 } 94 #endif 95