libfcoe/common/libfcoe.c

/*
 * 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 <stdlib.h>
#include <stdio.h>
#include <wchar.h>
#include <strings.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <libintl.h>
#include <errno.h>
#include <string.h>
#include <assert.h>
#include <syslog.h>
#include <libfcoe.h>
#include <libdllink.h>
#include <fcoeio.h>
#include <libscf.h>
#include <inttypes.h>

#define FCOE_DEV_PATH    "/devices/fcoe:admin"

#define OPEN_FCOE 0
#define OPEN_EXCL_FCOE O_EXCL

/*
 * Open for fcoe module
 *
 * flag - open flag (OPEN_FCOE, OPEN_EXCL_FCOE)
 * fd - pointer to integer. On success, contains the fcoe file descriptor
 */
static int
openFcoe(int flag, int *fd)
{
    int ret = FCOE_STATUS_ERROR;

    if ((*fd = open(FCOE_DEV_PATH, O_NDELAY | O_RDONLY | flag)) != -1) {
        ret = FCOE_STATUS_OK;
    } else {
        if (errno == EPERM || errno == EACCES) {
            ret = FCOE_STATUS_ERROR_PERM;
        } else {
            ret = FCOE_STATUS_ERROR_OPEN_DEV;
        }
        syslog(LOG_DEBUG, "openFcoe:open failure:%s:errno(%d)",
            FCOE_DEV_PATH, errno);
    }

    return (ret);
}

static void
WWN2str(char *buf, FCOE_PORT_WWN *wwn) {
    int j;
    unsigned char *pc = (unsigned char *)&(wwn->wwn[0]);
    buf[0] = '\0';
    for (j = 0; j < 16; j += 2) {
        (void) sprintf(&buf[j], "%02X", (int)*pc++);
    }
}

static int
isWWNZero(FCOE_PORT_WWN portwwn)
{
    int i;
    int size = sizeof (FCOE_PORT_WWN);

    for (i = 0; i < size; i++) {
        if (portwwn.wwn[i] != 0) {
            return (0);
        }
    }
    return (1);
}

/*
 * Initialize scf fcoe service access
 * handle - returned handle
 * service - returned service handle
 */
static int
fcoe_cfg_scf_init(scf_handle_t **handle, scf_service_t **service, int is_target)
{
    scf_scope_t *scope = NULL;
    int     ret;

    if ((*handle = scf_handle_create(SCF_VERSION)) == NULL) {
        syslog(LOG_ERR, "scf_handle_create failed - %s",
            scf_strerror(scf_error()));
        ret = FCOE_ERROR;
        goto err;
    }

    if (scf_handle_bind(*handle) == -1) {
        syslog(LOG_ERR, "scf_handle_bind failed - %s",
            scf_strerror(scf_error()));
        ret = FCOE_ERROR;
        goto err;
    }

    if ((*service = scf_service_create(*handle)) == NULL) {
        syslog(LOG_ERR, "scf_service_create failed - %s",
            scf_strerror(scf_error()));
        ret = FCOE_ERROR;
        goto err;
    }

    if ((scope = scf_scope_create(*handle)) == NULL) {
        syslog(LOG_ERR, "scf_scope_create failed - %s",
            scf_strerror(scf_error()));
        ret = FCOE_ERROR;
        goto err;
    }

    if (scf_handle_get_scope(*handle, SCF_SCOPE_LOCAL, scope) == -1) {
        syslog(LOG_ERR, "scf_handle_get_scope failed - %s",
            scf_strerror(scf_error()));
        ret = FCOE_ERROR;
        goto err;
    }

    if (scf_scope_get_service(scope,
        is_target ? FCOE_TARGET_SERVICE: FCOE_INITIATOR_SERVICE,
        *service) == -1) {
        syslog(LOG_ERR, "scf_scope_get_service failed - %s",
            scf_strerror(scf_error()));
        ret = FCOE_ERROR_SERVICE_NOT_FOUND;
        goto err;
    }

    scf_scope_destroy(scope);

    return (FCOE_SUCCESS);

err:
    if (*handle != NULL) {
        scf_handle_destroy(*handle);
    }
    if (*service != NULL) {
        scf_service_destroy(*service);
        *service = NULL;
    }
    if (scope != NULL) {
        scf_scope_destroy(scope);
    }
    return (ret);
}

static int
fcoe_add_remove_scf_entry(char *mac_name,
    char *pwwn, char *nwwn,
    int is_target, int is_promiscuous, int addRemoveFlag)
{
    scf_handle_t    *handle = NULL;
    scf_service_t   *svc = NULL;
    scf_propertygroup_t *pg = NULL;
    scf_transaction_t   *tran = NULL;
    scf_transaction_entry_t *entry = NULL;
    scf_property_t  *prop = NULL;
    scf_value_t *valueLookup = NULL;
    scf_iter_t  *valueIter = NULL;
    scf_value_t **valueSet = NULL;
    int ret = FCOE_SUCCESS;
    boolean_t   createProp = B_FALSE;
    int lastAlloc = 0;
    char    buf[FCOE_PORT_LIST_LENGTH] = {0};
    char    memberName[FCOE_PORT_LIST_LENGTH] = {0};
    boolean_t   found = B_FALSE;
    int i = 0;
    int valueArraySize = 0;
    int commitRet;
    int portListAlloc = 100;

    (void) snprintf(memberName, FCOE_PORT_LIST_LENGTH,
        "%s:%s:%s:%d:%d", mac_name, pwwn, nwwn,
        is_target, is_promiscuous);

    ret = fcoe_cfg_scf_init(&handle, &svc, is_target);
    if (ret != FCOE_SUCCESS) {
        goto out;
    }

    if (((pg = scf_pg_create(handle)) == NULL) ||
        ((tran = scf_transaction_create(handle)) == NULL) ||
        ((entry = scf_entry_create(handle)) == NULL) ||
        ((prop = scf_property_create(handle)) == NULL) ||
        ((valueIter = scf_iter_create(handle)) == NULL)) {
        ret = FCOE_ERROR;
        goto out;
    }

    /* get property group or create it */
    if (scf_service_get_pg(svc, FCOE_PG_NAME, pg) == -1) {
        if ((scf_error() == SCF_ERROR_NOT_FOUND)) {
            if (scf_service_add_pg(svc, FCOE_PG_NAME,
                SCF_GROUP_APPLICATION, 0, pg) == -1) {
                syslog(LOG_ERR, "add pg failed - %s",
                    scf_strerror(scf_error()));
                ret = FCOE_ERROR;
            } else {
                createProp = B_TRUE;
            }
        } else {
            syslog(LOG_ERR, "get pg failed - %s",
                scf_strerror(scf_error()));
            ret = FCOE_ERROR;
        }
        if (ret != FCOE_SUCCESS) {
            goto out;
        }
    }

    /* to make sure property exists */
    if (createProp == B_FALSE) {
        if (scf_pg_get_property(pg, FCOE_PORT_LIST, prop) == -1) {
            if ((scf_error() == SCF_ERROR_NOT_FOUND)) {
                createProp = B_TRUE;
            } else {
                syslog(LOG_ERR, "get property failed - %s",
                    scf_strerror(scf_error()));
                ret = FCOE_ERROR;
                goto out;
            }
        }
    }

    /* Begin the transaction */
    if (scf_transaction_start(tran, pg) == -1) {
        syslog(LOG_ERR, "start transaction failed - %s",
            scf_strerror(scf_error()));
        ret = FCOE_ERROR;
        goto out;
    }

    valueSet = (scf_value_t **)calloc(1, sizeof (*valueSet)
        * (lastAlloc = portListAlloc));
    if (valueSet == NULL) {
        ret = FCOE_ERROR_NOMEM;
        goto out;
    }

    if (createProp) {
        if (scf_transaction_property_new(tran, entry, FCOE_PORT_LIST,
            SCF_TYPE_USTRING) == -1) {
            if (scf_error() == SCF_ERROR_EXISTS) {
                ret = FCOE_ERROR_EXISTS;
            } else {
                syslog(LOG_ERR,
                    "transaction property new failed - %s",
                    scf_strerror(scf_error()));
                ret = FCOE_ERROR;
            }
            goto out;
        }
    } else {
        if (scf_transaction_property_change(tran, entry,
            FCOE_PORT_LIST, SCF_TYPE_USTRING) == -1) {
            syslog(LOG_ERR,
                "transaction property change failed - %s",
                scf_strerror(scf_error()));
            ret = FCOE_ERROR;
            goto out;
        }

        if (scf_pg_get_property(pg, FCOE_PORT_LIST, prop) == -1) {
            syslog(LOG_ERR, "get property failed - %s",
                scf_strerror(scf_error()));
            ret = FCOE_ERROR;
            goto out;
        }

        valueLookup = scf_value_create(handle);
        if (valueLookup == NULL) {
            syslog(LOG_ERR, "scf value alloc failed - %s",
                scf_strerror(scf_error()));
            ret = FCOE_ERROR;
            goto out;
        }

        if (scf_iter_property_values(valueIter, prop) == -1) {
            syslog(LOG_ERR, "iter value failed - %s",
                scf_strerror(scf_error()));
            ret = FCOE_ERROR;
            goto out;
        }

        while (scf_iter_next_value(valueIter, valueLookup) == 1) {
            char *macnameIter = NULL;
            char buftmp[FCOE_PORT_LIST_LENGTH] = {0};

            bzero(buf, sizeof (buf));
            if (scf_value_get_ustring(valueLookup,
                buf, MAXNAMELEN) == -1) {
                syslog(LOG_ERR, "iter value failed- %s",
                    scf_strerror(scf_error()));
                ret = FCOE_ERROR;
                break;
            }
            (void) strcpy(buftmp, buf);
            macnameIter = strtok(buftmp, ":");
            if (strcmp(macnameIter, mac_name) == 0) {
                if (addRemoveFlag == FCOE_SCF_ADD) {
                    ret = FCOE_ERROR_EXISTS;
                    break;
                } else {
                    found = B_TRUE;
                    continue;
                }
            }

            valueSet[i] = scf_value_create(handle);
            if (valueSet[i] == NULL) {
                syslog(LOG_ERR, "scf value alloc failed - %s",
                    scf_strerror(scf_error()));
                ret = FCOE_ERROR;
                break;
            }

            if (scf_value_set_ustring(valueSet[i], buf) == -1) {
                syslog(LOG_ERR, "set value failed 1- %s",
                    scf_strerror(scf_error()));
                ret = FCOE_ERROR;
                break;
            }

            if (scf_entry_add_value(entry, valueSet[i]) == -1) {
                syslog(LOG_ERR, "add value failed - %s",
                    scf_strerror(scf_error()));
                ret = FCOE_ERROR;
                break;
            }

            i++;

            if (i >= lastAlloc) {
                lastAlloc += portListAlloc;
                valueSet = realloc(valueSet,
                    sizeof (*valueSet) * lastAlloc);
                if (valueSet == NULL) {
                    ret = FCOE_ERROR;
                    break;
                }
            }
        }
    }

    valueArraySize = i;
    if (!found && (addRemoveFlag == FCOE_SCF_REMOVE)) {
        ret = FCOE_ERROR_MEMBER_NOT_FOUND;
    }
    if (ret != FCOE_SUCCESS) {
        goto out;
    }

    if (addRemoveFlag == FCOE_SCF_ADD) {
        /*
         * Now create the new entry
         */
        valueSet[i] = scf_value_create(handle);
        if (valueSet[i] == NULL) {
            syslog(LOG_ERR, "scf value alloc failed - %s",
                scf_strerror(scf_error()));
            ret = FCOE_ERROR;
            goto out;
        } else {
            valueArraySize++;
        }

        /*
         * Set the new member name
         */
        if (scf_value_set_ustring(valueSet[i], memberName) == -1) {
            syslog(LOG_ERR, "set value failed 2- %s",
                scf_strerror(scf_error()));
            ret = FCOE_ERROR;
            goto out;
        }

        /*
         * Add the new member
         */
        if (scf_entry_add_value(entry, valueSet[i]) == -1) {
            syslog(LOG_ERR, "add value failed - %s",
                scf_strerror(scf_error()));
            ret = FCOE_ERROR;
            goto out;
        }
    }

    if ((commitRet = scf_transaction_commit(tran)) != 1) {
        syslog(LOG_ERR, "transaction commit failed - %s",
            scf_strerror(scf_error()));
        if (commitRet == 0) {
            ret = FCOE_ERROR_BUSY;
        } else {
            ret = FCOE_ERROR;
        }
        goto out;
    }

out:
    /*
     * Free resources
     */
    if (handle != NULL) {
        scf_handle_destroy(handle);
    }
    if (svc != NULL) {
        scf_service_destroy(svc);
    }
    if (pg != NULL) {
        scf_pg_destroy(pg);
    }
    if (tran != NULL) {
        scf_transaction_destroy(tran);
    }
    if (entry != NULL) {
        scf_entry_destroy(entry);
    }
    if (prop != NULL) {
        scf_property_destroy(prop);
    }
    if (valueIter != NULL) {
        scf_iter_destroy(valueIter);
    }
    if (valueLookup != NULL) {
        scf_value_destroy(valueLookup);
    }

    /*
     * Free valueSet scf resources
     */
    if (valueArraySize > 0) {
        for (i = 0; i < valueArraySize; i++) {
            scf_value_destroy(valueSet[i]);
        }
    }
    /*
     * Now free the pointer array to the resources
     */
    if (valueSet != NULL) {
        free(valueSet);
    }

    return (ret);
}

FCOE_STATUS
FCOE_CreatePort(
    const FCOE_UINT8        *macLinkName,
    FCOE_UINT8      portType,
    FCOE_PORT_WWN       pwwn,
    FCOE_PORT_WWN       nwwn,
    FCOE_UINT8      promiscuous)
{
    FCOE_STATUS     status;
    int         fcoe_fd;
    fcoeio_t        fcoeio;
    fcoeio_create_port_param_t  param;
    dladm_handle_t      handle;
    datalink_id_t       linkid;
    datalink_class_t    class;

    bzero(&param, sizeof (fcoeio_create_port_param_t));

    if (macLinkName == NULL) {
        return (FCOE_STATUS_ERROR_INVAL_ARG);
    }

    if (strlen((char *)macLinkName) > MAXLINKNAMELEN-1) {
        return (FCOE_STATUS_ERROR_MAC_LEN);
    }

    if (dladm_open(&handle) != DLADM_STATUS_OK) {
        return (FCOE_STATUS_ERROR);
    }

    if (dladm_name2info(handle, (const char *)macLinkName,
        &linkid, NULL, &class, NULL) != DLADM_STATUS_OK) {
        dladm_close(handle);
        (void) fcoe_add_remove_scf_entry((char *)macLinkName,
            "",
            "",
            portType,
            0,
            FCOE_SCF_REMOVE);
        return (FCOE_STATUS_ERROR_GET_LINKINFO);
    }
    dladm_close(handle);

    if (class != DATALINK_CLASS_PHYS) {
        return (FCOE_STATUS_ERROR_CLASS_UNSUPPORT);
    }

    if (portType != FCOE_PORTTYPE_INITIATOR &&
        portType != FCOE_PORTTYPE_TARGET) {
        return (FCOE_STATUS_ERROR_INVAL_ARG);
    }

    if (!isWWNZero(pwwn)) {
        param.fcp_pwwn_provided = 1;
        bcopy(pwwn.wwn, param.fcp_pwwn, 8);
    }

    if (!isWWNZero(nwwn)) {
        param.fcp_nwwn_provided = 1;
        bcopy(nwwn.wwn, param.fcp_nwwn, 8);
    }

    if (param.fcp_pwwn_provided == 1 &&
        param.fcp_nwwn_provided == 1 &&
        bcmp(&pwwn, &nwwn, 8) == 0) {
        return (FCOE_STATUS_ERROR_WWN_SAME);
    }

    param.fcp_force_promisc = promiscuous;
    param.fcp_mac_linkid = linkid;
    param.fcp_port_type = (fcoe_cli_type_t)portType;

    if ((status = openFcoe(OPEN_FCOE, &fcoe_fd)) != FCOE_STATUS_OK) {
        return (status);
    }

    (void) memset(&fcoeio, 0, sizeof (fcoeio));
    fcoeio.fcoeio_cmd = FCOEIO_CREATE_FCOE_PORT;

    fcoeio.fcoeio_ilen = sizeof (param);
    fcoeio.fcoeio_xfer = FCOEIO_XFER_WRITE;
    fcoeio.fcoeio_ibuf = (uintptr_t)&param;

    if (ioctl(fcoe_fd, FCOEIO_CMD, &fcoeio) != 0) {
        switch (fcoeio.fcoeio_status) {
        case FCOEIOE_INVAL_ARG:
            status = FCOE_STATUS_ERROR_INVAL_ARG;
            break;

        case FCOEIOE_BUSY:
            status = FCOE_STATUS_ERROR_BUSY;
            break;

        case FCOEIOE_ALREADY:
            status = FCOE_STATUS_ERROR_ALREADY;
            break;

        case FCOEIOE_PWWN_CONFLICTED:
            status = FCOE_STATUS_ERROR_PWWN_CONFLICTED;
            break;

        case FCOEIOE_NWWN_CONFLICTED:
            status = FCOE_STATUS_ERROR_NWWN_CONFLICTED;
            break;

        case FCOEIOE_CREATE_MAC:
            status = FCOE_STATUS_ERROR_CREATE_MAC;
            break;

        case FCOEIOE_OPEN_MAC:
            status = FCOE_STATUS_ERROR_OPEN_MAC;
            break;

        case FCOEIOE_CREATE_PORT:
            status = FCOE_STATUS_ERROR_CREATE_PORT;
            break;

        case FCOEIOE_NEED_JUMBO_FRAME:
            status = FCOE_STATUS_ERROR_NEED_JUMBO_FRAME;
            break;

        default:
            status = FCOE_STATUS_ERROR;
        }
    } else {
        char cpwwn[17], cnwwn[17];

        WWN2str(cpwwn, &pwwn);
        WWN2str(cnwwn, &nwwn);

        (void) fcoe_add_remove_scf_entry((char *)macLinkName,
            cpwwn,
            cnwwn,
            portType,
            promiscuous,
            FCOE_SCF_ADD);
        status = FCOE_STATUS_OK;
    }
    (void) close(fcoe_fd);
    return (status);
}

FCOE_STATUS
FCOE_DeletePort(const FCOE_UINT8 *macLinkName)
{
    FCOE_STATUS status = FCOE_STATUS_OK;
    int fcoe_fd;
    fcoeio_t    fcoeio;
    dladm_handle_t      handle;
    datalink_id_t       linkid;
    fcoeio_delete_port_param_t fc_del_port;
    uint64_t    is_target = 0;
    int     io_ret = 0;

    if (macLinkName == NULL) {
        return (FCOE_STATUS_ERROR_INVAL_ARG);
    }

    if (strlen((char *)macLinkName) > MAXLINKNAMELEN-1) {
        return (FCOE_STATUS_ERROR_MAC_LEN);
    }
    if (dladm_open(&handle) != DLADM_STATUS_OK) {
        return (FCOE_STATUS_ERROR);
    }

    if (dladm_name2info(handle, (const char *)macLinkName,
        &linkid, NULL, NULL, NULL) != DLADM_STATUS_OK) {
        dladm_close(handle);
        return (FCOE_STATUS_ERROR_GET_LINKINFO);
    }
    dladm_close(handle);

    if ((status = openFcoe(OPEN_FCOE, &fcoe_fd)) != FCOE_STATUS_OK) {
        return (status);
    }

    fc_del_port.fdp_mac_linkid = linkid;

    (void) memset(&fcoeio, 0, sizeof (fcoeio));
    fcoeio.fcoeio_cmd = FCOEIO_DELETE_FCOE_PORT;

    /* only 4 bytes here, need to change */
    fcoeio.fcoeio_ilen = sizeof (fcoeio_delete_port_param_t);
    fcoeio.fcoeio_olen = sizeof (uint64_t);
    fcoeio.fcoeio_xfer = FCOEIO_XFER_RW;
    fcoeio.fcoeio_ibuf = (uintptr_t)&fc_del_port;
    fcoeio.fcoeio_obuf = (uintptr_t)&is_target;

    io_ret = ioctl(fcoe_fd, FCOEIO_CMD, &fcoeio);
    if (io_ret != 0) {
        switch (fcoeio.fcoeio_status) {
        case FCOEIOE_INVAL_ARG:
            status = FCOE_STATUS_ERROR_INVAL_ARG;
            break;

        case FCOEIOE_BUSY:
            status = FCOE_STATUS_ERROR_BUSY;
            break;

        case FCOEIOE_ALREADY:
            status = FCOE_STATUS_ERROR_ALREADY;
            break;

        case FCOEIOE_MAC_NOT_FOUND:
            status = FCOE_STATUS_ERROR_MAC_NOT_FOUND;
            break;

        case FCOEIOE_OFFLINE_FAILURE:
            status = FCOE_STATUS_ERROR_OFFLINE_DEV;
            break;

        default:
            status = FCOE_STATUS_ERROR;
        }
    } else {
        (void) fcoe_add_remove_scf_entry((char *)macLinkName,
            "",
            "",
            is_target,
            0,
            FCOE_SCF_REMOVE);
        status = FCOE_STATUS_OK;
    }

    if (io_ret == FCOEIOE_MAC_NOT_FOUND) {
        (void) fcoe_add_remove_scf_entry((char *)macLinkName,
            "",
            "",
            0,
            0,
            FCOE_SCF_REMOVE);
        (void) fcoe_add_remove_scf_entry((char *)macLinkName,
            "",
            "",
            1,
            0,
            FCOE_SCF_REMOVE);
    }
    (void) close(fcoe_fd);
    return (status);
}

FCOE_STATUS
FCOE_GetPortList(
    FCOE_UINT32     *port_num,
    FCOE_PORT_ATTRIBUTE **portlist)
{
    FCOE_STATUS status = FCOE_STATUS_OK;
    int     fcoe_fd;
    fcoeio_t    fcoeio;
    fcoe_port_list_t    *inportlist = NULL;
    FCOE_PORT_ATTRIBUTE *outportlist = NULL;
    int     i;
    int     size = 64; /* default first attempt */
    int     retry = 0;
    int     bufsize;
    dladm_handle_t  handle;
    char        mac_name[MAXLINKNAMELEN];

    if (port_num == NULL || portlist == NULL) {
        return (FCOE_STATUS_ERROR_INVAL_ARG);
    }
    *port_num = 0;

    if ((status = openFcoe(OPEN_FCOE, &fcoe_fd)) != FCOE_STATUS_OK) {
        return (status);
    }

    /* Get fcoe port list */
    (void) memset(&fcoeio, 0, sizeof (fcoeio));
    retry = 0;

    do {
        bufsize = sizeof (fcoe_port_instance_t) * (size - 1) +
            sizeof (fcoe_port_list_t);
        inportlist = (fcoe_port_list_t *)malloc(bufsize);
        fcoeio.fcoeio_cmd = FCOEIO_GET_FCOE_PORT_LIST;
        fcoeio.fcoeio_olen = bufsize;
        fcoeio.fcoeio_xfer = FCOEIO_XFER_READ;
        fcoeio.fcoeio_obuf = (uintptr_t)inportlist;

        if (ioctl(fcoe_fd, FCOEIO_CMD, &fcoeio) != 0) {
            if (fcoeio.fcoeio_status == FCOEIOE_MORE_DATA) {
                size = inportlist->numPorts;
            }
            free(inportlist);
            switch (fcoeio.fcoeio_status) {
            case FCOEIOE_INVAL_ARG:
                status = FCOE_STATUS_ERROR_INVAL_ARG;
                (void) close(fcoe_fd);
                return (status);

            case FCOEIOE_BUSY:
                status = FCOE_STATUS_ERROR_BUSY;
                retry++;
                break;

            case FCOEIOE_MORE_DATA:
                status = FCOE_STATUS_ERROR_MORE_DATA;
                retry++;
            default:
                status = FCOE_STATUS_ERROR;
                (void) close(fcoe_fd);
                return (status);
            }
        } else {
            status = FCOE_STATUS_OK;
            break;
        }
    } while (retry <= 3 && status != FCOE_STATUS_OK);

    if (status == FCOE_STATUS_OK && inportlist->numPorts > 0) {
        if (dladm_open(&handle) != DLADM_STATUS_OK) {
            handle = NULL;
        }

        outportlist = (PFCOE_PORT_ATTRIBUTE)
            malloc(sizeof (FCOE_PORT_ATTRIBUTE) * inportlist->numPorts);

        for (i = 0; i < inportlist->numPorts; i++) {
            fcoe_port_instance_t *pi = &inportlist->ports[i];
            FCOE_PORT_ATTRIBUTE *po = &outportlist[i];
            bcopy(pi->fpi_pwwn, &po->port_wwn, 8);

            if (handle == NULL ||
                dladm_datalink_id2info(handle, pi->fpi_mac_linkid,
                NULL, NULL, NULL, mac_name, sizeof (mac_name))
                != DLADM_STATUS_OK) {
                (void) strcpy((char *)po->mac_link_name,
                    "<unknown>");
            } else {
                (void) strcpy((char *)po->mac_link_name,
                    mac_name);
            }
            bcopy(pi->fpi_mac_factory_addr,
                po->mac_factory_addr, 6);
            bcopy(pi->fpi_mac_current_addr,
                po->mac_current_addr, 6);
            po->port_type = (FCOE_UINT8)pi->fpi_port_type;
            po->mtu_size = pi->fpi_mtu_size;
            po->mac_promisc = pi->fpi_mac_promisc;
        }

        if (handle != NULL) {
            dladm_close(handle);
        }
        *port_num = inportlist->numPorts;
        *portlist = outportlist;
        free(inportlist);
    } else {
        *port_num = 0;
        *portlist = NULL;
    }
    (void) close(fcoe_fd);
    return (status);
}

FCOE_STATUS FCOE_LoadConfig(
    FCOE_UINT8      portType,
    FCOE_SMF_PORT_LIST **portlist)
{
    scf_handle_t    *handle = NULL;
    scf_service_t   *svc = NULL;
    scf_propertygroup_t *pg = NULL;
    scf_transaction_t   *tran = NULL;
    scf_transaction_entry_t *entry = NULL;
    scf_property_t      *prop = NULL;
    scf_value_t *valueLookup = NULL;
    scf_iter_t  *valueIter = NULL;
    char        buf[FCOE_PORT_LIST_LENGTH] = {0};
    int     commitRet;
    FCOE_UINT32 portIndex;
    int     bufsize, retry;
    int     size = 10; /* default first attempt */
    int     pg_or_prop_not_found = 0;

    commitRet = fcoe_cfg_scf_init(&handle, &svc, portType);
    if (commitRet != FCOE_SUCCESS) {
        goto out;
    }

    if (((pg = scf_pg_create(handle)) == NULL) ||
        ((tran = scf_transaction_create(handle)) == NULL) ||
        ((entry = scf_entry_create(handle)) == NULL) ||
        ((prop = scf_property_create(handle)) == NULL) ||
        ((valueIter = scf_iter_create(handle)) == NULL)) {
        goto out;
    }

    if (scf_service_get_pg(svc, FCOE_PG_NAME, pg) == -1) {
        pg_or_prop_not_found = 1;
        goto out;
    }

    if (scf_pg_get_property(pg, FCOE_PORT_LIST, prop) == -1) {
        pg_or_prop_not_found = 1;
        goto out;
    }

    valueLookup = scf_value_create(handle);
    if (valueLookup == NULL) {
        syslog(LOG_ERR, "scf value alloc failed - %s",
            scf_strerror(scf_error()));
        goto out;
    }

    portIndex = 0;

    do {
        if (scf_iter_property_values(valueIter, prop) == -1) {
            syslog(LOG_ERR, "iter value failed - %s",
                scf_strerror(scf_error()));
            goto out;
        }

        retry = 0;
        bufsize = sizeof (FCOE_SMF_PORT_INSTANCE) * (size - 1) +
            sizeof (FCOE_SMF_PORT_LIST);
        *portlist = (PFCOE_SMF_PORT_LIST)malloc(bufsize);

        while (scf_iter_next_value(valueIter, valueLookup) == 1) {
            uint8_t *macLinkName = NULL;
            char *remainder = NULL;
            uint64_t    nodeWWN, portWWN;
            int is_target, is_promiscuous;

            bzero(buf, sizeof (buf));
            if (scf_value_get_ustring(valueLookup, buf,
                MAXNAMELEN) == -1) {
                syslog(LOG_ERR, "iter value failed - %s",
                    scf_strerror(scf_error()));
                break;
            }
            macLinkName = (uint8_t *)strtok(buf, ":");
            remainder = strtok(NULL, "#");
            (void) sscanf(remainder,
                "%016" PRIx64 ":%016" PRIx64 ":%d:%d",
                &portWWN, &nodeWWN, &is_target, &is_promiscuous);

            if (portIndex >= size) {
                free(*portlist);
                retry = 1;
                size *= 2;
                break;
            } else {
                PFCOE_SMF_PORT_INSTANCE pi =
                    &(*portlist)->ports[portIndex++];
                (void) strcpy((char *)pi->mac_link_name,
                    (char *)macLinkName);
                pi->port_type = is_target ?
                    FCOE_PORTTYPE_TARGET:
                    FCOE_PORTTYPE_INITIATOR;
                portWWN = htonll(portWWN);
                nodeWWN = htonll(nodeWWN);
                (void) memcpy(&pi->port_pwwn, &portWWN,
                    sizeof (FCOE_PORT_WWN));
                (void) memcpy(&pi->port_nwwn, &nodeWWN,
                    sizeof (FCOE_PORT_WWN));
                pi->mac_promisc = is_promiscuous;
            }
        }

        (*portlist)->port_num = portIndex;
    } while (retry == 1);

    return (FCOE_STATUS_OK);
out:
    /*
     * Free resources
     */
    if (handle != NULL) {
        scf_handle_destroy(handle);
    }
    if (svc != NULL) {
        scf_service_destroy(svc);
    }
    if (pg != NULL) {
        scf_pg_destroy(pg);
    }
    if (tran != NULL) {
        scf_transaction_destroy(tran);
    }
    if (entry != NULL) {
        scf_entry_destroy(entry);
    }
    if (prop != NULL) {
        scf_property_destroy(prop);
    }
    if (valueIter != NULL) {
        scf_iter_destroy(valueIter);
    }
    if (valueLookup != NULL) {
        scf_value_destroy(valueLookup);
    }

    if (pg_or_prop_not_found == 1) {
        return (FCOE_STATUS_OK);
    } else {
        return (FCOE_STATUS_ERROR);
    }
}