gmlnd_utils.c

非常经典的一个分布式系统

        int          nrx_small = *gmnal_tunables.gm_nrx_small;
        int          nrx_large = *gmnal_tunables.gm_nrx_large;
        int          nrx = nrx_large + nrx_small;
        int          rc;
        int          i;

        CDEBUG(D_NET, "nrxcred: %d(%dL+%dS)\n", nrxcred, nrx_large, nrx_small);

        if (nrx > nrxcred) {
                int nlarge = (nrx_large * nrxcred)/nrx;
                int nsmall = nrxcred - nlarge;
                
                CWARN("Only %d rx credits: "
                      "reducing large %d->%d, small %d->%d\n", nrxcred,
                      nrx_large, nlarge, nrx_small, nsmall);
                
                *gmnal_tunables.gm_nrx_large = nrx_large = nlarge;
                *gmnal_tunables.gm_nrx_small = nrx_small = nsmall;
                nrx = nlarge + nsmall;
        }
        
	gmni->gmni_rx_hash = gm_create_hash(gm_hash_compare_ptrs, 
                                            gm_hash_hash_ptr, 0, 0, nrx, 0);
	if (gmni->gmni_rx_hash == NULL) {
                CERROR("Failed to create hash table\n");
                return -ENOMEM;
	}

        for (i = 0; i < nrx; i++ ) {
                rc = gmnal_alloc_rx(gmni, i < nrx_large);
                if (rc != 0)
                        return rc;
        }

	return 0;
}

char * 
gmnal_gmstatus2str(gm_status_t status)
{
	return(gm_strerror(status));

	switch(status) {
        case(GM_SUCCESS):
                return("SUCCESS");
        case(GM_FAILURE):
                return("FAILURE");
        case(GM_INPUT_BUFFER_TOO_SMALL):
                return("INPUT_BUFFER_TOO_SMALL");
        case(GM_OUTPUT_BUFFER_TOO_SMALL):
                return("OUTPUT_BUFFER_TOO_SMALL");
        case(GM_TRY_AGAIN ):
                return("TRY_AGAIN");
        case(GM_BUSY):
                return("BUSY");
        case(GM_MEMORY_FAULT):
                return("MEMORY_FAULT");
        case(GM_INTERRUPTED):
                return("INTERRUPTED");
        case(GM_INVALID_PARAMETER):
                return("INVALID_PARAMETER");
        case(GM_OUT_OF_MEMORY):
                return("OUT_OF_MEMORY");
        case(GM_INVALID_COMMAND):
                return("INVALID_COMMAND");
        case(GM_PERMISSION_DENIED):
                return("PERMISSION_DENIED");
        case(GM_INTERNAL_ERROR):
                return("INTERNAL_ERROR");
        case(GM_UNATTACHED):
                return("UNATTACHED");
        case(GM_UNSUPPORTED_DEVICE):
                return("UNSUPPORTED_DEVICE");
        case(GM_SEND_TIMED_OUT):
                return("GM_SEND_TIMEDOUT");
        case(GM_SEND_REJECTED):
                return("GM_SEND_REJECTED");
        case(GM_SEND_TARGET_PORT_CLOSED):
                return("GM_SEND_TARGET_PORT_CLOSED");
        case(GM_SEND_TARGET_NODE_UNREACHABLE):
                return("GM_SEND_TARGET_NODE_UNREACHABLE");
        case(GM_SEND_DROPPED):
                return("GM_SEND_DROPPED");
        case(GM_SEND_PORT_CLOSED):
                return("GM_SEND_PORT_CLOSED");
        case(GM_NODE_ID_NOT_YET_SET):
                return("GM_NODE_ID_NOT_YET_SET");
        case(GM_STILL_SHUTTING_DOWN):
                return("GM_STILL_SHUTTING_DOWN");
        case(GM_CLONE_BUSY):
                return("GM_CLONE_BUSY");
        case(GM_NO_SUCH_DEVICE):
                return("GM_NO_SUCH_DEVICE");
        case(GM_ABORTED):
                return("GM_ABORTED");
        case(GM_INCOMPATIBLE_LIB_AND_DRIVER):
                return("GM_INCOMPATIBLE_LIB_AND_DRIVER");
        case(GM_UNTRANSLATED_SYSTEM_ERROR):
                return("GM_UNTRANSLATED_SYSTEM_ERROR");
        case(GM_ACCESS_DENIED):
                return("GM_ACCESS_DENIED");

        
        /*
         *	These ones are in the docs but aren't in the header file 
         case(GM_DEV_NOT_FOUND):
         return("GM_DEV_NOT_FOUND");
         case(GM_INVALID_PORT_NUMBER):
         return("GM_INVALID_PORT_NUMBER");
         case(GM_UC_ERROR):
         return("GM_US_ERROR");
         case(GM_PAGE_TABLE_FULL):
         return("GM_PAGE_TABLE_FULL");
         case(GM_MINOR_OVERFLOW):
         return("GM_MINOR_OVERFLOW");
         case(GM_SEND_ORPHANED):
         return("GM_SEND_ORPHANED");
         case(GM_HARDWARE_FAULT):
         return("GM_HARDWARE_FAULT");
         case(GM_DATA_CORRUPTED):
         return("GM_DATA_CORRUPTED");
         case(GM_TIMED_OUT):
         return("GM_TIMED_OUT");
         case(GM_USER_ERROR):
         return("GM_USER_ERROR");
         case(GM_NO_MATCH):
         return("GM_NOMATCH");
         case(GM_NOT_SUPPORTED_IN_KERNEL):
         return("GM_NOT_SUPPORTED_IN_KERNEL");
         case(GM_NOT_SUPPORTED_ON_ARCH):
         return("GM_NOT_SUPPORTED_ON_ARCH");
         case(GM_PTE_REF_CNT_OVERFLOW):
         return("GM_PTR_REF_CNT_OVERFLOW");
         case(GM_NO_DRIVER_SUPPORT):
         return("GM_NO_DRIVER_SUPPORT");
         case(GM_FIRMWARE_NOT_RUNNING):
         return("GM_FIRMWARE_NOT_RUNNING");
         *	These ones are in the docs but aren't in the header file 
         */

        default:
                return("UNKNOWN GM ERROR CODE");
	}
}


char *
gmnal_rxevent2str(gm_recv_event_t *ev)
{
	short	event;
	event = GM_RECV_EVENT_TYPE(ev);
	switch(event) {
        case(GM_NO_RECV_EVENT):
                return("GM_NO_RECV_EVENT");
        case(GM_SENDS_FAILED_EVENT):
                return("GM_SEND_FAILED_EVENT");
        case(GM_ALARM_EVENT):
                return("GM_ALARM_EVENT");
        case(GM_SENT_EVENT):
                return("GM_SENT_EVENT");
        case(_GM_SLEEP_EVENT):
                return("_GM_SLEEP_EVENT");
        case(GM_RAW_RECV_EVENT):
                return("GM_RAW_RECV_EVENT");
        case(GM_BAD_SEND_DETECTED_EVENT):
                return("GM_BAD_SEND_DETECTED_EVENT");
        case(GM_SEND_TOKEN_VIOLATION_EVENT):
                return("GM_SEND_TOKEN_VIOLATION_EVENT");
        case(GM_RECV_TOKEN_VIOLATION_EVENT):
                return("GM_RECV_TOKEN_VIOLATION_EVENT");
        case(GM_BAD_RECV_TOKEN_EVENT):
                return("GM_BAD_RECV_TOKEN_EVENT");
        case(GM_ALARM_VIOLATION_EVENT):
                return("GM_ALARM_VIOLATION_EVENT");
        case(GM_RECV_EVENT):
                return("GM_RECV_EVENT");
        case(GM_HIGH_RECV_EVENT):
                return("GM_HIGH_RECV_EVENT");
        case(GM_PEER_RECV_EVENT):
                return("GM_PEER_RECV_EVENT");
        case(GM_HIGH_PEER_RECV_EVENT):
                return("GM_HIGH_PEER_RECV_EVENT");
        case(GM_FAST_RECV_EVENT):
                return("GM_FAST_RECV_EVENT");
        case(GM_FAST_HIGH_RECV_EVENT):
                return("GM_FAST_HIGH_RECV_EVENT");
        case(GM_FAST_PEER_RECV_EVENT):
                return("GM_FAST_PEER_RECV_EVENT");
        case(GM_FAST_HIGH_PEER_RECV_EVENT):
                return("GM_FAST_HIGH_PEER_RECV_EVENT");
        case(GM_REJECTED_SEND_EVENT):
                return("GM_REJECTED_SEND_EVENT");
        case(GM_ORPHANED_SEND_EVENT):
                return("GM_ORPHANED_SEND_EVENT");
        case(GM_BAD_RESEND_DETECTED_EVENT):
                return("GM_BAD_RESEND_DETETED_EVENT");
        case(GM_DROPPED_SEND_EVENT):
                return("GM_DROPPED_SEND_EVENT");
        case(GM_BAD_SEND_VMA_EVENT):
                return("GM_BAD_SEND_VMA_EVENT");
        case(GM_BAD_RECV_VMA_EVENT):
                return("GM_BAD_RECV_VMA_EVENT");
        case(_GM_FLUSHED_ALARM_EVENT):
                return("GM_FLUSHED_ALARM_EVENT");
        case(GM_SENT_TOKENS_EVENT):
                return("GM_SENT_TOKENS_EVENTS");
        case(GM_IGNORE_RECV_EVENT):
                return("GM_IGNORE_RECV_EVENT");
        case(GM_ETHERNET_RECV_EVENT):
                return("GM_ETHERNET_RECV_EVENT");
        case(GM_NEW_NO_RECV_EVENT):
                return("GM_NEW_NO_RECV_EVENT");
        case(GM_NEW_SENDS_FAILED_EVENT):
                return("GM_NEW_SENDS_FAILED_EVENT");
        case(GM_NEW_ALARM_EVENT):
                return("GM_NEW_ALARM_EVENT");
        case(GM_NEW_SENT_EVENT):
                return("GM_NEW_SENT_EVENT");
        case(_GM_NEW_SLEEP_EVENT):
                return("GM_NEW_SLEEP_EVENT");
        case(GM_NEW_RAW_RECV_EVENT):
                return("GM_NEW_RAW_RECV_EVENT");
        case(GM_NEW_BAD_SEND_DETECTED_EVENT):
                return("GM_NEW_BAD_SEND_DETECTED_EVENT");
        case(GM_NEW_SEND_TOKEN_VIOLATION_EVENT):
                return("GM_NEW_SEND_TOKEN_VIOLATION_EVENT");
        case(GM_NEW_RECV_TOKEN_VIOLATION_EVENT):
                return("GM_NEW_RECV_TOKEN_VIOLATION_EVENT");
        case(GM_NEW_BAD_RECV_TOKEN_EVENT):
                return("GM_NEW_BAD_RECV_TOKEN_EVENT");
        case(GM_NEW_ALARM_VIOLATION_EVENT):
                return("GM_NEW_ALARM_VIOLATION_EVENT");
        case(GM_NEW_RECV_EVENT):
                return("GM_NEW_RECV_EVENT");
        case(GM_NEW_HIGH_RECV_EVENT):
                return("GM_NEW_HIGH_RECV_EVENT");
        case(GM_NEW_PEER_RECV_EVENT):
                return("GM_NEW_PEER_RECV_EVENT");
        case(GM_NEW_HIGH_PEER_RECV_EVENT):
                return("GM_NEW_HIGH_PEER_RECV_EVENT");
        case(GM_NEW_FAST_RECV_EVENT):
                return("GM_NEW_FAST_RECV_EVENT");
        case(GM_NEW_FAST_HIGH_RECV_EVENT):
                return("GM_NEW_FAST_HIGH_RECV_EVENT");
        case(GM_NEW_FAST_PEER_RECV_EVENT):
                return("GM_NEW_FAST_PEER_RECV_EVENT");
        case(GM_NEW_FAST_HIGH_PEER_RECV_EVENT):
                return("GM_NEW_FAST_HIGH_PEER_RECV_EVENT");
        case(GM_NEW_REJECTED_SEND_EVENT):
                return("GM_NEW_REJECTED_SEND_EVENT");
        case(GM_NEW_ORPHANED_SEND_EVENT):
                return("GM_NEW_ORPHANED_SEND_EVENT");
        case(_GM_NEW_PUT_NOTIFICATION_EVENT):
                return("_GM_NEW_PUT_NOTIFICATION_EVENT");
        case(GM_NEW_FREE_SEND_TOKEN_EVENT):
                return("GM_NEW_FREE_SEND_TOKEN_EVENT");
        case(GM_NEW_FREE_HIGH_SEND_TOKEN_EVENT):
                return("GM_NEW_FREE_HIGH_SEND_TOKEN_EVENT");
        case(GM_NEW_BAD_RESEND_DETECTED_EVENT):
                return("GM_NEW_BAD_RESEND_DETECTED_EVENT");
        case(GM_NEW_DROPPED_SEND_EVENT):
                return("GM_NEW_DROPPED_SEND_EVENT");
        case(GM_NEW_BAD_SEND_VMA_EVENT):
                return("GM_NEW_BAD_SEND_VMA_EVENT");
        case(GM_NEW_BAD_RECV_VMA_EVENT):
                return("GM_NEW_BAD_RECV_VMA_EVENT");
        case(_GM_NEW_FLUSHED_ALARM_EVENT):
                return("GM_NEW_FLUSHED_ALARM_EVENT");
        case(GM_NEW_SENT_TOKENS_EVENT):
                return("GM_NEW_SENT_TOKENS_EVENT");
        case(GM_NEW_IGNORE_RECV_EVENT):
                return("GM_NEW_IGNORE_RECV_EVENT");
        case(GM_NEW_ETHERNET_RECV_EVENT):
                return("GM_NEW_ETHERNET_RECV_EVENT");
        default:
                return("Unknown Recv event");
        /* _GM_PUT_NOTIFICATION_EVENT */
        /* GM_FREE_SEND_TOKEN_EVENT */
        /* GM_FREE_HIGH_SEND_TOKEN_EVENT */
        }
}


void
gmnal_yield(int delay)
{
	set_current_state(TASK_INTERRUPTIBLE);
	schedule_timeout(delay);
}