orted.c

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

    int rc;
    
    if (orted_globals.debug_daemons) {
        opal_output(0, "[%lu,%lu,%lu] orted: received launch callback", ORTE_NAME_ARGS(orte_process_info.my_name));
    }
    
    /* pass the data to the orted_local_launcher and get a report on
     * success or failure of the launch
     */
    if (ORTE_SUCCESS != (rc = orte_odls.launch_local_procs(data, orted_globals.saved_environ))) {
        /* if there was an error, report it.
         * NOTE: it is absolutely imperative that we do not cause the orted to EXIT when
         * this happens!!! If we do, then the HNP will "hang" as the orted will no longer
         * be around to receive messages telling it what to do in response to the failure
         */
        ORTE_ERROR_LOG(rc);
    }
    
    /* all done - return and let the orted sleep until something happens */
    return;
}


static void signal_callback(int fd, short flags, void *arg)
{
    OPAL_TRACE(1);
    orted_globals.exit_condition = true;
    opal_condition_signal(&orted_globals.condition);
}

static void orte_daemon_recv_pls(int status, orte_process_name_t* sender,
                 orte_buffer_t *buffer, orte_rml_tag_t tag,
                 void* cbdata)
{
    orte_daemon_cmd_flag_t command;
    orte_buffer_t answer;
    int ret;
    orte_std_cntr_t n;
    int32_t signal;
    orte_gpr_notify_data_t *ndat;
    orte_jobid_t job;

    OPAL_TRACE(1);

    OPAL_THREAD_LOCK(&orted_globals.mutex);

    if (orted_globals.debug_daemons) {
       opal_output(0, "[%lu,%lu,%lu] orted_recv_pls: received message from [%ld,%ld,%ld]",
                   ORTE_NAME_ARGS(orte_process_info.my_name),
                   ORTE_NAME_ARGS(sender));
    }

    /* unpack the command */
    n = 1;
    if (ORTE_SUCCESS != (ret = orte_dss.unpack(buffer, &command, &n, ORTE_DAEMON_CMD))) {
        ORTE_ERROR_LOG(ret);
        goto CLEANUP;
    }
    
    switch(command) {

        /****    KILL_LOCAL_PROCS   ****/
        case ORTE_DAEMON_KILL_LOCAL_PROCS:
            if (orted_globals.debug_daemons) {
                opal_output(0, "[%lu,%lu,%lu] orted_recv_pls: received kill_local_procs",
                            ORTE_NAME_ARGS(orte_process_info.my_name));
            }
            /* unpack the jobid - could be JOBID_WILDCARD, which would indicatge
             * we should kill all local procs. Otherwise, only kill those within
             * the specified jobid
             */
            n = 1;
            if (ORTE_SUCCESS != (ret = orte_dss.unpack(buffer, &job, &n, ORTE_JOBID))) {
                ORTE_ERROR_LOG(ret);
                goto CLEANUP;
            }

            if (ORTE_SUCCESS != (ret = orte_odls.kill_local_procs(job, true))) {
                ORTE_ERROR_LOG(ret);
            }
            break;
            
        /****    SIGNAL_LOCAL_PROCS   ****/
        case ORTE_DAEMON_SIGNAL_LOCAL_PROCS:
            if (orted_globals.debug_daemons) {
                opal_output(0, "[%lu,%lu,%lu] orted_recv_pls: received signal_local_procs",
                            ORTE_NAME_ARGS(orte_process_info.my_name));
            }
            /* get the signal */
            n = 1;
            if (ORTE_SUCCESS != (ret = orte_dss.unpack(buffer, &signal, &n, ORTE_INT32))) {
                ORTE_ERROR_LOG(ret);
                goto CLEANUP;
            }
                
            /* see if they specified a process to signal, or if we
             * should just signal them all
             *
             * NOTE: FOR NOW, WE JUST SIGNAL ALL CHILDREN
             */

            if (ORTE_SUCCESS != (ret = orte_odls.signal_local_procs(NULL, signal))) {
                ORTE_ERROR_LOG(ret);
            }
            break;

            /****    ADD_LOCAL_PROCS   ****/
        case ORTE_DAEMON_ADD_LOCAL_PROCS:
            if (orted_globals.debug_daemons) {
                opal_output(0, "[%lu,%lu,%lu] orted_recv_pls: received add_local_procs",
                            ORTE_NAME_ARGS(orte_process_info.my_name));
            }
            /* unpack the notify data object */
            n = 1;
            if (ORTE_SUCCESS != (ret = orte_dss.unpack(buffer, &ndat, &n, ORTE_GPR_NOTIFY_DATA))) {
                ORTE_ERROR_LOG(ret);
                goto CLEANUP;
            }
            
            /* launch the processes */
            if (ORTE_SUCCESS != (ret = orte_odls.launch_local_procs(ndat, orted_globals.saved_environ))) {
                ORTE_ERROR_LOG(ret);
            }

            /* cleanup the memory */
            OBJ_RELEASE(ndat);
            break;
           
            /****    EXIT COMMAND    ****/
        case ORTE_DAEMON_EXIT_CMD:
            if (orted_globals.debug_daemons) {
                opal_output(0, "[%lu,%lu,%lu] orted_recv_pls: received exit",
                            ORTE_NAME_ARGS(orte_process_info.my_name));
            }
            /* no response to send here - we'll send it when nearly exit'd */
            orted_globals.exit_condition = true;
            opal_condition_signal(&orted_globals.condition);
            OPAL_THREAD_UNLOCK(&orted_globals.mutex);
            return;
            break;

        default:
            ORTE_ERROR_LOG(ORTE_ERR_BAD_PARAM);
            break;
    }

 CLEANUP:
    /* send an ack that command is done */
    OBJ_CONSTRUCT(&answer, orte_buffer_t);
    if (0 > orte_rml.send_buffer(sender, &answer, ORTE_RML_TAG_PLS_ORTED_ACK, 0)) {
        ORTE_ERROR_LOG(ORTE_ERR_COMM_FAILURE);
    }
    OBJ_DESTRUCT(&answer);
    
    OPAL_THREAD_UNLOCK(&orted_globals.mutex);

    /* reissue the non-blocking receive */
    ret = orte_rml.recv_buffer_nb(ORTE_NAME_WILDCARD, ORTE_RML_TAG_PLS_ORTED, ORTE_RML_NON_PERSISTENT, orte_daemon_recv_pls, NULL);
    if (ret != ORTE_SUCCESS && ret != ORTE_ERR_NOT_IMPLEMENTED) {
        ORTE_ERROR_LOG(ret);
    }

    return;
}

static void exit_callback(int fd, short event, void *arg)
{
    /* Trigger the normal exit conditions */
    orted_globals.exit_condition = true;
    opal_condition_signal(&orted_globals.condition);
    OPAL_THREAD_UNLOCK(&orted_globals.mutex);
}

static void halt_vm(void)
{
    int ret;
    struct timeval tv = { 1, 0 };
    opal_event_t* event;
    opal_list_t attrs;
    opal_list_item_t *item;
    
    /* terminate the vm - this will also wake us up so we can exit */
    OBJ_CONSTRUCT(&attrs, opal_list_t);
    orte_rmgr.add_attribute(&attrs, ORTE_NS_INCLUDE_DESCENDANTS, ORTE_UNDEF, NULL, ORTE_RMGR_ATTR_OVERRIDE);
    ret = orte_pls.terminate_orteds(0, &orte_abort_timeout, &attrs);
    while (NULL != (item = opal_list_remove_first(&attrs))) OBJ_RELEASE(item);
    OBJ_DESTRUCT(&attrs);
    
    /* setup a delay to give the orteds time to complete their departure */
    if (NULL != (event = (opal_event_t*)malloc(sizeof(opal_event_t)))) {
        opal_evtimer_set(event, exit_callback, NULL);
        opal_evtimer_add(event, &tv);
    }
}

static void orte_daemon_recv(int status, orte_process_name_t* sender,
                             orte_buffer_t *buffer, orte_rml_tag_t tag,
                             void* cbdata)
{
    orte_buffer_t *answer;
    orte_daemon_cmd_flag_t command;
    int ret;
    orte_std_cntr_t n;
    char *contact_info;
    
    OPAL_TRACE(1);
    
    OPAL_THREAD_LOCK(&orted_globals.mutex);
    
    if (orted_globals.debug_daemons) {
        opal_output(0, "[%lu,%lu,%lu] orted_recv: received message from [%ld,%ld,%ld]",
                    ORTE_NAME_ARGS(orte_process_info.my_name),
                    ORTE_NAME_ARGS(sender));
    }
    
    n = 1;
    if (ORTE_SUCCESS != (ret = orte_dss.unpack(buffer, &command, &n, ORTE_DAEMON_CMD))) {
        ORTE_ERROR_LOG(ret);
        OPAL_THREAD_UNLOCK(&orted_globals.mutex);
        return;
    }
    
    answer = OBJ_NEW(orte_buffer_t);
    if (NULL == answer) {
        ORTE_ERROR_LOG(ORTE_ERR_OUT_OF_RESOURCE);
        goto DONE;
    }
    
    switch(command) {
        /****    EXIT COMMAND    ****/
        case ORTE_DAEMON_EXIT_CMD:
            if (orted_globals.debug_daemons) {
                opal_output(0, "[%lu,%lu,%lu] orted_recv: received exit",
                            ORTE_NAME_ARGS(orte_process_info.my_name));
            }
            
            orted_globals.exit_condition = true;
            opal_condition_signal(&orted_globals.condition);
            break;

        /****    HALT VM COMMAND    ****/
        case ORTE_DAEMON_HALT_VM_CMD:
            if (orted_globals.debug_daemons) {
                opal_output(0, "[%lu,%lu,%lu] orted_recv: received halt vm",
                            ORTE_NAME_ARGS(orte_process_info.my_name));
            }
            halt_vm();
            break;
            
        /****     CONTACT QUERY COMMAND    ****/
        case ORTE_DAEMON_CONTACT_QUERY_CMD:
            /* send back contact info */
            contact_info = orte_rml.get_uri();
            
            if (NULL == contact_info) {
                ORTE_ERROR_LOG(ORTE_ERROR);
                goto CLEANUP;
            }
            
            if (ORTE_SUCCESS != (ret = orte_dss.pack(answer, &contact_info, 1, ORTE_STRING))) {
                ORTE_ERROR_LOG(ret);
                goto CLEANUP;
            }
            
            if (0 > orte_rml.send_buffer(sender, answer, tag, 0)) {
                ORTE_ERROR_LOG(ORTE_ERR_COMM_FAILURE);
            }
            break;
        
        /****     HOSTFILE COMMAND    ****/
        case ORTE_DAEMON_HOSTFILE_CMD:
            ORTE_ERROR_LOG(ORTE_ERR_NOT_IMPLEMENTED);
            break;
        
        /****     SCRIPTFILE COMMAND    ****/
        case ORTE_DAEMON_SCRIPTFILE_CMD:
            ORTE_ERROR_LOG(ORTE_ERR_NOT_IMPLEMENTED);
            break;
        
        /****     HEARTBEAT COMMAND    ****/
        case ORTE_DAEMON_HEARTBEAT_CMD:
            ORTE_ERROR_LOG(ORTE_ERR_NOT_IMPLEMENTED);
            break;
            
        default:
            ORTE_ERROR_LOG(ORTE_ERR_BAD_PARAM);
    }
    
CLEANUP:
    OBJ_RELEASE(answer);
    
DONE:
    OPAL_THREAD_UNLOCK(&orted_globals.mutex);
    
    /* reissue the non-blocking receive */
    ret = orte_rml.recv_buffer_nb(ORTE_NAME_WILDCARD, ORTE_RML_TAG_DAEMON, ORTE_RML_NON_PERSISTENT, orte_daemon_recv, NULL);
    if (ret != ORTE_SUCCESS && ret != ORTE_ERR_NOT_IMPLEMENTED) {
        ORTE_ERROR_LOG(ret);
    }
    
    return;
}