sun_fc/common/Sun_fcGetFcpTargetMapping.cc

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */


#include "Trace.h"
#include "Exceptions.h"
#include "sun_fc.h"


#include <string.h>
#include "Handle.h"
#include "HBA.h"
#include "HBAPort.h"
inline HBA_WWN
getAdapterPortWWN(HBA_HANDLE handle,HBA_UINT32 index) {
    HBA_WWN hba_wwn;
    memset(hba_wwn.wwn, 0, sizeof (hba_wwn));
    try {
        Handle *myHandle = Handle::findHandle(handle);
        HBA *hba = myHandle->getHBA();
        HBAPort *port = hba->getPortByIndex(index);
        uint64_t tmp = htonll(port->getPortWWN());
        memcpy(hba_wwn.wwn, &tmp, sizeof (hba_wwn));
    } catch (...) { }
    return (hba_wwn);
}

#ifdef  __cplusplus
extern "C" {
#endif

/**
 * @memo        Retrieves the mapping between FCP targets and OS
 *          SCSI information
 * @return      HBA_STATUS_OK if the mapping structure contains valid
 *          mapping data.
 * @param       handle The HBA to fetch mappings for
 * @param       mapping The user-allocated mapping structure
 *
 * @doc         This routine will call the V2 interface and convert
 *          the results to the old data structure.  It will
 *          call the V2 interface for all ports on the HBA.
 */
HBA_STATUS
Sun_fcGetFcpTargetMapping(HBA_HANDLE handle, PHBA_FCPTARGETMAPPING mapping) {
    HBA_STATUS          status;
    int             count;
    PHBA_FCPTARGETMAPPINGV2     mappingV2;
    HBA_ADAPTERATTRIBUTES       attributes;
    HBA_UINT32                  entries = 0;
    HBA_UINT32                  current = 0;
    HBA_UINT32                  port;
    HBA_UINT32                  limit;

    Trace log("Sun_fcGetFcpTargetMapping");

    if (mapping == NULL) {
        log.userError("NULL mapping argument.");
        return (HBA_STATUS_ERROR_ARG);
    }

    entries = mapping->NumberOfEntries;

    /* get adapter attributes for number of ports */
    status = Sun_fcGetAdapterAttributes(handle,&attributes);
    if (status != HBA_STATUS_OK) {
        log.userError("Unable to get adapter attributes");
        return HBA_STATUS_ERROR;
    }

    mappingV2 = (PHBA_FCPTARGETMAPPINGV2) new uchar_t[
        (sizeof (HBA_FCPSCSIENTRYV2)*(mapping->NumberOfEntries-1)) +
        sizeof (HBA_FCPTARGETMAPPINGV2)];
    mapping->NumberOfEntries = 0;

    for(port = 0; port < attributes.NumberOfPorts; port++) {
        mappingV2->NumberOfEntries = mapping->NumberOfEntries < entries ?
            entries - mapping->NumberOfEntries : 0 ;
        status = Sun_fcGetFcpTargetMappingV2(handle,
            getAdapterPortWWN(handle,port), mappingV2);
        mapping->NumberOfEntries += mappingV2->NumberOfEntries;

        if (status != HBA_STATUS_OK && status != HBA_STATUS_ERROR_MORE_DATA) {
                log.userError("Unable to get mappings for port");
                return status;
        }
        /*
         * need to copy from PHBA_FCPTARGETMAPPINGV2 to
         * PHBA_FCPTARGETMAPPING
         */
        limit = (mapping->NumberOfEntries < entries) ? mapping->NumberOfEntries : entries;
        for (count = current; count < limit; count++) {
            memcpy(&mapping->entry[count].ScsiId,
                &mappingV2->entry[count-current].ScsiId,
                sizeof (mapping->entry[count].ScsiId));
            memcpy(&mapping->entry[count].FcpId,
                &mappingV2->entry[count-current].FcpId,
                sizeof (mapping->entry[count].FcpId));
        }
        current = mapping->NumberOfEntries;
    }

    delete(mappingV2);
    return (status);
}
#ifdef  __cplusplus
}
#endif