sun_fc/common/TgtFCHBAPort.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 <TgtFCHBAPort.h>
#include <Exceptions.h>
#include <Trace.h>
#include <sun_fc.h>
#include <iostream>
#include <iomanip>
#include <sys/types.h>
#include <sys/mkdev.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <stropts.h>
#include <dirent.h>
#include <sys/fibre-channel/fc.h>
#include <sys/fctio.h>
#include <sys/fibre-channel/impl/fc_error.h>
#include <sys/fibre-channel/fc_appif.h>
#include <sys/scsi/generic/commands.h>
#include <sys/scsi/impl/commands.h>
#include <sys/scsi/impl/sense.h>
#include <sys/scsi/generic/inquiry.h>
#include <sys/scsi/generic/status.h>
#include <errno.h>
#include <cstdlib>


using namespace std;

const int TgtFCHBAPort::MAX_FCTIO_MSG_LEN = 256;
const string TgtFCHBAPort::FCT_DRIVER_PATH = "/devices/pseudo/fct@0:admin";

/*
 * Interpret the error code in the fctio_t structure
 *
 * message must be at least MAX_FCTIO_MSG_LEN in length.
 */
void
TgtFCHBAPort::transportError(uint32_t fctio_errno, char *message) {
    Trace log("transportError");
    string fcioErrorString;
    if (message == NULL) {
        log.internalError("NULL routine argument");
        return;
    }
    switch (fctio_errno) {
    case (uint32_t)FC_FAILURE:
        fcioErrorString = "general failure";
        break;
    case (uint32_t)FC_FAILURE_SILENT:
        fcioErrorString = "general failure but fail silently";
        break;
    case FC_SUCCESS:
        fcioErrorString = "successful completion";
        break;
    case FC_CAP_ERROR:
        fcioErrorString = "FCA capability error";
        break;
    case FC_CAP_FOUND:
        fcioErrorString = "FCA capability unsettable";
        break;
    case FC_CAP_SETTABLE:
        fcioErrorString = "FCA capability settable";
        break;
    case FC_UNBOUND:
        fcioErrorString = "unbound stuff";
        break;
    case FC_NOMEM:
        fcioErrorString = "allocation error";
        break;
    case FC_BADPACKET:
        fcioErrorString = "invalid packet specified/supplied";
        break;
    case FC_OFFLINE:
        fcioErrorString = "I/O resource unavailable";
        break;
    case FC_OLDPORT:
        fcioErrorString = "operation on non-loop port";
        break;
    case FC_NO_MAP:
        fcioErrorString = "requested map unavailable";
        break;
    case FC_TRANSPORT_ERROR:
        fcioErrorString = "unable to transport I/O";
        break;
    case FC_ELS_FREJECT:
        fcioErrorString = "ELS rejected by a Fabric";
        break;
    case FC_ELS_PREJECT:
        fcioErrorString = "ELS rejected by an N_port";
        break;
    case FC_ELS_BAD:
        fcioErrorString = "ELS rejected by FCA/fctl";
        break;
    case FC_ELS_MALFORMED:
        fcioErrorString = "poorly formed ELS request";
        break;
    case FC_TOOMANY:
        fcioErrorString = "resource request too large";
        break;
    case FC_UB_BADTOKEN:
        fcioErrorString = "invalid unsolicited buffer token";
        break;
    case FC_UB_ERROR:
        fcioErrorString = "invalid unsol buf request";
        break;
    case FC_UB_BUSY:
        fcioErrorString = "buffer already in use";
        break;
    case FC_BADULP:
        fcioErrorString = "Unknown ulp";
        break;
    case FC_BADTYPE:
        fcioErrorString = "ULP not registered to handle this FC4 type";
        break;
    case FC_UNCLAIMED:
        fcioErrorString = "request or data not claimed";
        break;
    case FC_ULP_SAMEMODULE:
        fcioErrorString = "module already in use";
        break;
    case FC_ULP_SAMETYPE:
        fcioErrorString = "FC4 module already in use";
        break;
    case FC_ABORTED:
        fcioErrorString = "request aborted";
        break;
    case FC_ABORT_FAILED:
        fcioErrorString = "abort request failed";
        break;
    case FC_BADEXCHANGE:
        fcioErrorString = "exchange doesn�t exist";
        break;
    case FC_BADWWN:
        fcioErrorString = "WWN not recognized";
        break;
    case FC_BADDEV:
        fcioErrorString = "device unrecognized";
        break;
    case FC_BADCMD:
        fcioErrorString = "invalid command issued";
        break;
    case FC_BADOBJECT:
        fcioErrorString = "invalid object requested";
        break;
    case FC_BADPORT:
        fcioErrorString = "invalid port specified";
        break;
    case FC_NOTTHISPORT:
        fcioErrorString = "resource not at this port";
        break;
    case FC_PREJECT:
        fcioErrorString = "reject at remote N_Port";
        break;
    case FC_FREJECT:
        fcioErrorString = "reject at remote Fabric";
        break;
    case FC_PBUSY:
        fcioErrorString = "remote N_Port busy";
        break;
    case FC_FBUSY:
        fcioErrorString = "remote Fabric busy";
        break;
    case FC_ALREADY:
        fcioErrorString = "already logged in";
        break;
    case FC_LOGINREQ:
        fcioErrorString = "login required";
        break;
    case FC_RESETFAIL:
        fcioErrorString = "reset failed";
        break;
    case FC_INVALID_REQUEST:
        fcioErrorString = "request is invalid";
        break;
    case FC_OUTOFBOUNDS:
        fcioErrorString = "port number is out of bounds";
        break;
    case FC_TRAN_BUSY:
        fcioErrorString = "command transport busy";
        break;
    case FC_STATEC_BUSY:
        fcioErrorString = "port driver currently busy";
        break;
    case FC_DEVICE_BUSY:
        fcioErrorString = "transport working on this device";
        break;
    case FC_DEVICE_NOT_TGT:
        fcioErrorString = "device is not a SCSI target";
        break;
    default:
        snprintf(message, MAX_FCTIO_MSG_LEN, "Unknown error code 0x%x",
        fctio_errno);
        return;
    }
    snprintf(message, MAX_FCTIO_MSG_LEN, "%s", fcioErrorString.c_str());
}

TgtFCHBAPort::TgtFCHBAPort(string thePath) : HBAPort() {
    Trace log("TgtFCHBAPort::TgtFCHBAPort");
    log.debug("Initializing HBA port %s", path.c_str());
    path = thePath;

    // This routine is not index based, so we can discard stateChange
    uint64_t tmp;
    HBA_PORTATTRIBUTES attrs = getPortAttributes(tmp);
    memcpy(&tmp, &attrs.PortWWN, 8);
    portWWN = ntohll(tmp);
    memcpy(&tmp, &attrs.NodeWWN, 8);
    nodeWWN = ntohll(tmp);

    // For reference, here's how to dump WWN's through C++ streams.
    // cout << "\tPort WWN: " << hex << setfill('0') << setw(16) << portWWN
    // << endl;
    // cout << "\tNode WWN: " << hex << setfill('0') << setw(16) << nodeWWN
    // << endl;
}

HBA_PORTATTRIBUTES TgtFCHBAPort::getPortAttributes(uint64_t &stateChange) {
    Trace log("TgtFCHBAPort::getPortAttributes");

    HBA_PORTATTRIBUTES  attributes;
    fctio_t         fctio;
    fc_tgt_hba_port_attributes_t    attrs;

    memset(&fctio, 0, sizeof (fctio));
    memset(&attributes, 0, sizeof (attributes));

    uint64_t portwwn = 0;
    try {
        string::size_type offset = path.find_last_of(".");
        if (offset >= 0) {
        string portwwnString = path.substr(offset+1);
        portwwn = strtoull(portwwnString.c_str(), NULL, 16);
        }
    } catch (...) {
        throw BadArgumentException();
    }

    uint64_t en_wwn = htonll(portwwn);

    fctio.fctio_cmd = FCTIO_GET_ADAPTER_PORT_ATTRIBUTES;
    fctio.fctio_ilen = 8;
    fctio.fctio_ibuf = (uint64_t)(uintptr_t)&en_wwn;
    fctio.fctio_xfer = FCTIO_XFER_READ;
    fctio.fctio_olen = (uint32_t)(sizeof (attrs));
    fctio.fctio_obuf = (uint64_t)(uintptr_t)&attrs;

    fct_ioctl(FCTIO_CMD, &fctio);

    stateChange = attrs.lastChange;

    attributes.PortFcId = attrs.PortFcId;
    attributes.PortType = attrs.PortType;
    attributes.PortState = attrs.PortState;
    attributes.PortSupportedClassofService = attrs.PortSupportedClassofService;
    attributes.PortSupportedSpeed = attrs.PortSupportedSpeed;
    attributes.PortSpeed = attrs.PortSpeed;
    attributes.PortMaxFrameSize = attrs.PortMaxFrameSize;
    attributes.NumberofDiscoveredPorts = attrs.NumberofDiscoveredPorts;
    memcpy(&attributes.NodeWWN, &attrs.NodeWWN, 8);
    memcpy(&attributes.PortWWN, &attrs.PortWWN, 8);
    memcpy(&attributes.FabricName, &attrs.FabricName, 8);
    memcpy(&attributes.PortSupportedFc4Types, &attrs.PortSupportedFc4Types, 32);
    memcpy(&attributes.PortActiveFc4Types, &attrs.PortActiveFc4Types, 32);
    memcpy(&attributes.PortSymbolicName, &attrs.PortSymbolicName, 256);

    strncpy((char *)attributes.OSDeviceName, "Not Applicable", 15);
    return (attributes);
}

HBA_PORTATTRIBUTES TgtFCHBAPort::getDiscoveredAttributes(
        HBA_UINT32 discoveredport, uint64_t &stateChange) {
    Trace log("TgtFCHBAPort::getDiscoverdAttributes(i)");

    HBA_PORTATTRIBUTES      attributes;
    fctio_t         fctio;
    fc_tgt_hba_port_attributes_t    attrs;

    memset(&fctio, 0, sizeof (fctio));
    memset(&attributes, 0, sizeof (attributes));

    uint64_t portwwn = 0;
    try {
        string::size_type offset = path.find_last_of(".");
        if (offset >= 0) {
        string portwwnString = path.substr(offset+1);
        portwwn = strtoull(portwwnString.c_str(), NULL, 16);
        }
    } catch (...) {
        throw BadArgumentException();
    }

    uint64_t en_wwn = htonll(portwwn);

    fctio.fctio_cmd = FCTIO_GET_DISCOVERED_PORT_ATTRIBUTES;
    fctio.fctio_ilen = 8;
    fctio.fctio_ibuf = (uint64_t)(uintptr_t)&en_wwn;
    fctio.fctio_xfer = FCTIO_XFER_READ;
    fctio.fctio_olen = (uint32_t)(sizeof (attrs));
    fctio.fctio_obuf = (uint64_t)(uintptr_t)&attrs;
    fctio.fctio_alen = (uint32_t)(sizeof (discoveredport));
    fctio.fctio_abuf = (uint64_t)(uintptr_t)&discoveredport;

    fct_ioctl(FCTIO_CMD, &fctio);

    stateChange = attrs.lastChange;

    attributes.PortFcId = attrs.PortFcId;
    attributes.PortType = attrs.PortType;
    attributes.PortState = attrs.PortState;
    attributes.PortSupportedClassofService = attrs.PortSupportedClassofService;
    attributes.PortSupportedSpeed = attrs.PortSupportedSpeed;
    attributes.PortSpeed = attrs.PortSpeed;
    attributes.PortMaxFrameSize = attrs.PortMaxFrameSize;
    attributes.NumberofDiscoveredPorts = attrs.NumberofDiscoveredPorts;
    memcpy(&attributes.NodeWWN, &attrs.NodeWWN, 8);
    memcpy(&attributes.PortWWN, &attrs.PortWWN, 8);
    memcpy(&attributes.FabricName, &attrs.FabricName, 8);
    memcpy(&attributes.PortSupportedFc4Types, &attrs.PortSupportedFc4Types, 32);
    memcpy(&attributes.PortActiveFc4Types, &attrs.PortActiveFc4Types, 32);
    memcpy(&attributes.PortSymbolicName, &attrs.PortSymbolicName, 256);


    return (attributes);
}

HBA_PORTATTRIBUTES TgtFCHBAPort::getDiscoveredAttributes(
        uint64_t wwn, uint64_t &stateChange) {
    Trace log("TgtFCHBAPort::getDiscoverdAttributes(p)");

    HBA_PORTATTRIBUTES attributes;
    fctio_t         fctio;
    fc_tgt_hba_port_attributes_t    attrs;

    memset(&fctio, 0, sizeof (fctio));
    memset(&attributes, 0, sizeof (attributes));

    uint64_t en_wwn = htonll(wwn);

    fctio.fctio_cmd = FCTIO_GET_PORT_ATTRIBUTES;
    fctio.fctio_olen = (uint32_t)(sizeof (attrs));
    fctio.fctio_xfer = FCTIO_XFER_READ;
    fctio.fctio_obuf = (uint64_t)(uintptr_t)&attrs;
    fctio.fctio_ilen = (uint32_t)(sizeof (wwn));
    fctio.fctio_ibuf = (uint64_t)(uintptr_t)&en_wwn;

    fct_ioctl(FCTIO_CMD, &fctio);

    stateChange = attrs.lastChange;

    attributes.PortFcId = attrs.PortFcId;
    attributes.PortType = attrs.PortType;
    attributes.PortState = attrs.PortState;
    attributes.PortSupportedClassofService = attrs.PortSupportedClassofService;
    attributes.PortSupportedSpeed = attrs.PortSupportedSpeed;
    attributes.PortSpeed = attrs.PortSpeed;
    attributes.PortMaxFrameSize = attrs.PortMaxFrameSize;
    attributes.NumberofDiscoveredPorts = attrs.NumberofDiscoveredPorts;
    memcpy(&attributes.NodeWWN, &attrs.NodeWWN, 8);
    memcpy(&attributes.PortWWN, &attrs.PortWWN, 8);
    memcpy(&attributes.FabricName, &attrs.FabricName, 8);
    memcpy(&attributes.PortSupportedFc4Types, &attrs.PortSupportedFc4Types, 32);
    memcpy(&attributes.PortActiveFc4Types, &attrs.PortActiveFc4Types, 32);
    memcpy(&attributes.PortSymbolicName, &attrs.PortSymbolicName, 256);


    return (attributes);
}

void TgtFCHBAPort::sendRLS(uint64_t destWWN,
        void        *pRspBuffer,
        HBA_UINT32      *pRspBufferSize) {
    Trace log("FCHBAPort::sendRLS");

    fctio_t     fctio;
    // fc_hba_adapter_port_stats_t  fc_port_stat;
    uint64_t    en_portWWN;
    uint64_t    DestPortID;

    // Validate the arguments
    if (pRspBuffer == NULL ||
        pRspBufferSize == NULL) {
        log.userError("NULL hba");
        throw BadArgumentException();
    }

    // check to see if we are sending RLS to the HBA
    HBA_PORTATTRIBUTES attrs;
    uint64_t tmp;
    portWWN = getPortWWN();
    en_portWWN = htonll(portWWN);

    /* The destWWN is either the adapter port or a discovered port. */
    memset(&fctio, 0, sizeof (fctio));
    fctio.fctio_cmd = FCTIO_GET_LINK_STATUS;
    fctio.fctio_ibuf = (uint64_t)(uintptr_t)&en_portWWN;
    fctio.fctio_ilen = (uint32_t)(sizeof (en_portWWN));
    if (portWWN != destWWN) {
        attrs = getDiscoveredAttributes(destWWN, tmp);
        DestPortID = (uint64_t)attrs.PortFcId;
        fctio.fctio_abuf = (uint64_t)(uintptr_t)&DestPortID;
        fctio.fctio_alen = (uint32_t)(sizeof (DestPortID));
    }
    fctio.fctio_xfer = FCTIO_XFER_READ;
    fctio.fctio_flags = 0;
    fctio.fctio_obuf = (uint64_t)(uintptr_t)new uchar_t[*pRspBufferSize];
    fctio.fctio_olen = *pRspBufferSize;

    if (fctio.fctio_obuf == NULL) {
        log.noMemory();
        throw InternalError();
    }

    fct_ioctl(FCTIO_CMD, &fctio);
    memcpy(pRspBuffer, (uchar_t *)(uintptr_t)fctio.fctio_obuf,
           *pRspBufferSize);
    if (fctio.fctio_obuf != NULL) {
        delete((uchar_t *)(uintptr_t)fctio.fctio_obuf);
    }
}

/**
 * @memo        Validate that the port is still present in the system
 * @exception       UnavailableException if the port is not present
 * @version     1.7
 *
 * @doc         If the port is still present on the system, the routine
 *          will return normally.  If the port is not present
 *          an exception will be thrown.
 */
void TgtFCHBAPort::validatePresent() {
    Trace log("TgtFCHBAPort::validatePresent");
    // We already got the adapter list through the ioctl
    // so calling it again to validate it is too expensive.
}

void TgtFCHBAPort::fct_ioctl(int cmd, fctio_t *fctio) {
    Trace log("TgtFCHBAPort::fct_ioctl");
    char fcioErrorString[MAX_FCTIO_MSG_LEN] = "";
    int fd = HBA::_open(FCT_DRIVER_PATH, O_NDELAY | O_RDONLY);
    try {
        HBA::_ioctl(fd, cmd, (uchar_t *)fctio);
        close(fd);
        if (fctio->fctio_errno) {
        throw IOError("IOCTL transport failure");
        }
    } catch (...) {
        close(fd);
        transportError(fctio->fctio_errno, fcioErrorString);
        log.genericIOError("ioctl (0x%x) failed. Transport: \"%s\"", cmd,
            fcioErrorString);
        switch (fctio->fctio_errno) {
        case FC_BADWWN:
        throw IllegalWWNException();
        case FC_BADPORT:
        throw IllegalWWNException();
        case FC_OUTOFBOUNDS:
        throw IllegalIndexException();
        case FC_PBUSY:
        case FC_FBUSY:
        case FC_TRAN_BUSY:
        case FC_STATEC_BUSY:
        case FC_DEVICE_BUSY:
        throw BusyException();
        case FC_SUCCESS:
        default:
        throw;
        }
    }
}