rds_proxy.c

MPI stands for the Message Passing Interface. Written by the MPI Forum (a large committee comprising

/*
 * Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
 *                         University Research and Technology
 *                         Corporation.  All rights reserved.
 * Copyright (c) 2004-2005 The University of Tennessee and The University
 *                         of Tennessee Research Foundation.  All rights
 *                         reserved.
 * Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
 *                         University of Stuttgart.  All rights reserved.
 * Copyright (c) 2004-2005 The Regents of the University of California.
 *                         All rights reserved.
 * $COPYRIGHT$
 *
 * Additional copyrights may follow
 *
 * $HEADER$
 */
/** @file:
 *
 */

#include "orte_config.h"

#include <string.h>

#include "orte/orte_constants.h"
#include "orte/orte_types.h"

#include "orte/dss/dss.h"
#include "orte/mca/errmgr/errmgr.h"
#include "orte/mca/rml/rml.h"

#include "orte/mca/rds/base/rds_private.h"
#include "rds_proxy.h"

/**
 * globals
 */

/*
 * functions
 */

int orte_rds_proxy_query(orte_jobid_t job)
{
    orte_buffer_t* cmd;
    orte_buffer_t* answer;
    orte_rds_cmd_flag_t command;
    orte_std_cntr_t count;
    int rc;

    command = ORTE_RDS_QUERY_CMD;

    cmd = OBJ_NEW(orte_buffer_t);
    if (cmd == NULL) {
        ORTE_ERROR_LOG(ORTE_ERR_OUT_OF_RESOURCE);
        return ORTE_ERR_OUT_OF_RESOURCE;
    }

    if (ORTE_SUCCESS != (rc = orte_dss.pack(cmd, &command, 1, ORTE_RDS_CMD))) {
        ORTE_ERROR_LOG(rc);
        OBJ_RELEASE(cmd);
        return rc;
    }

    if (ORTE_SUCCESS != (rc = orte_dss.pack(cmd, &job, 1, ORTE_JOBID))) {
        ORTE_ERROR_LOG(rc);
        OBJ_RELEASE(cmd);
        return rc;
    }
    
    if (0 > orte_rml.send_buffer(orte_rds_proxy_replica, cmd, ORTE_RML_TAG_RDS, 0)) {
        ORTE_ERROR_LOG(ORTE_ERR_COMM_FAILURE);
        OBJ_RELEASE(cmd);
        return ORTE_ERR_COMM_FAILURE;
    }
    OBJ_RELEASE(cmd);

    answer = OBJ_NEW(orte_buffer_t);
    if(answer == NULL) {
        ORTE_ERROR_LOG(ORTE_ERR_OUT_OF_RESOURCE);
        return ORTE_ERR_OUT_OF_RESOURCE;
    }

    if (0 > orte_rml.recv_buffer(orte_rds_proxy_replica, answer, ORTE_RML_TAG_RDS)) {
        ORTE_ERROR_LOG(ORTE_ERR_COMM_FAILURE);
        OBJ_RELEASE(answer);
        return ORTE_ERR_COMM_FAILURE;
    }

    count = 1;
    if (ORTE_SUCCESS != (rc = orte_dss.unpack(answer, &command, &count, ORTE_RDS_CMD))) {
        ORTE_ERROR_LOG(rc);
        OBJ_RELEASE(answer);
        return rc;
    }

    if (ORTE_RDS_QUERY_CMD != command) {
        ORTE_ERROR_LOG(ORTE_ERR_COMM_FAILURE);
        OBJ_RELEASE(answer);
        return ORTE_ERR_COMM_FAILURE;
    }

    OBJ_RELEASE(answer);
    return ORTE_SUCCESS;
}