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/*
* Copyright (c) 2001-2002 The Trustees of Indiana University.
* All rights reserved.
* Copyright (c) 1998-2001 University of Notre Dame.
* All rights reserved.
* Copyright (c) 1994-1998 The Ohio State University.
* All rights reserved.
*
* This file is part of the LAM/MPI software package. For license
* information, see the LICENSE file in the top level directory of the
* LAM/MPI source distribution.
*
* $HEADER$
* Ohio Trollius
* Copyright 1995 The Ohio State University
* GDB
*
* $Id: couter.c,v 6.4 2002/10/09 20:56:47 brbarret Exp $
*
* Function: - OTB internal process client protocols
*/
#include <stdlib.h>
#include <string.h>
#include <all_queue.h>
#include <kreq.h>
#include <net.h>
#include <terror.h>
#include <typical.h>
/*
* external variables
*/
extern struct kproc *prun; /* current running client */
/*
* external functions
*/
extern void kio_cleanup(); /* free resources */
extern void ksnap(); /* kernel state request */
extern int ksync(); /* look ahead at sync */
/*
* _cipc_ksend
*
* Function: - internal kernel message send
* - enqueues request in process descriptor
* - copies the message body
* Accepts: - kernel request ptr
* - kernel reply ptr
* Returns: - 0
*/
int
_cipc_ksend(preq, preply)
struct kreq *preq;
struct kreply *preply;
{
char *p;
char **ppmsg; /* ptr to msg body ptr */
/*
* Check for non-blocking service.
*/
if (preq->kq_msg.k_flags & KTRY) {
if (! ksync(&preq->kq_msg, KQSEND)) {
/*
* Enqueue the kernel request even though we know it is a NOP,
* so that KPROBE will be satisfied.
*/
if (aq_shove(prun->kp_kqueue, preq))
lampanic("lamd (aq_shove)");
errno = EWOULDBLOCK;
return(LAMERROR);
}
}
/*
* Copy network message header.
*/
if (preq->kq_msg.k_flags & KNMSG) {
p = malloc(sizeof(struct nmsg));
if (!p) lampanic("lamd (malloc)");
memcpy(p, preq->kq_msg.k_msg, sizeof(struct nmsg));
preq->kq_msg.k_msg = p;
ppmsg = &(((struct nmsg *) p)->nh_msg);
} else {
ppmsg = &(preq->kq_msg.k_msg);
}
/*
* Copy message body.
*/
if (preq->kq_msg.k_length > 0) {
p = malloc((unsigned) preq->kq_msg.k_length);
if (!p) lampanic("lamd (malloc)");
memcpy(p, *ppmsg, preq->kq_msg.k_length);
*ppmsg = p;
}
/*
* Enqueue the kernel request.
*/
if (aq_shove(prun->kp_kqueue, preq)) lampanic("lamd (aq_shove)");
/*
* Fake the reply.
*/
preply->kr_reply = 0;
preply->kr_signal = 0;
preply->kr_length = preq->kq_msg.k_length;
preply->kr_type = 0;
return(0);
}
/*
* _cipc_krecvfront
*
* Function: - internal kernel message receive
* - enqueues request in process descriptor
* Accepts: - kernel request ptr
* Returns: - 0
*/
int
_cipc_krecvfront(preq)
struct kreq *preq;
{
if (aq_shove(prun->kp_kqueue, preq)) lampanic("lamd (aq_shove)");
return(0);
}
/*
* _cipc_krecvback
*
* Function: - internal kernel message receive
* - builds fake reply
* Accepts: - kernel request ptr
* - kernel reply ptr
* Returns: - 0
*/
int
_cipc_krecvback(preq, preply)
struct kreq *preq;
struct kreply *preply;
{
preply->kr_reply = 0;
preply->kr_signal = 0;
preply->kr_length = 0;
preply->kr_type = 0;
return(0);
}
/*
* _cipc_ksrfront
*
* Function: - internal kernel message send/receive
* Accepts: - kernel request ptr
* - kernel reply ptr
* Returns: - 0
*/
int
_cipc_ksrfront(preq, preply)
struct kreq *preq;
struct kreply *preply;
{
return(_cipc_ksend(preq, preply));
}
/*
* _cipc_ksrback
*
* Function: - internal kernel message send/receive
* - builds fake reply
* Accepts: - kernel request ptr
* - kernel reply ptr
*/
int
_cipc_ksrback(preq, preply)
struct kreq *preq;
struct kreply *preply;
{
preply->kr_reply = 0;
preply->kr_signal = 0;
preply->kr_length = 0;
preply->kr_type = 0;
return(0);
}
/*
* _cipc_req
*
* Function: - internal kernel request
* - enqueues request in process descriptor
* Accepts: - kernel request ptr
* - kernel reply ptr
* Returns: - 0
*/
int
_cipc_kreq(preq, preply)
struct kreq *preq;
struct kreply *preply;
{
if (preq->kq_req == KQSTATE) {
ksnap(preq, preply);
} else {
/*
* Enqueue the kernel request.
*/
if (aq_shove(prun->kp_kqueue, preq))
lampanic("lamd (aq_shove)");
/*
* Fake the reply.
*/
preply->kr_reply = 0;
}
preply->kr_signal = 0;
return(0);
}
/*
* _cipc_cleanup
*
* Function: - frees internal client and kernel resources
*/
void
_cipc_cleanup()
{
kio_cleanup();
}
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