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allocate.c
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allocate.c
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/*****************************************************************************\
* allocate.c - allocate nodes for a job or step with supplied contraints
* $Id$
*****************************************************************************
* Copyright (C) 2002 The Regents of the University of California.
* Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
* Written by moe jette <jette1@llnl.gov>.
* UCRL-CODE-2002-040.
*
* This file is part of SLURM, a resource management program.
* For details, see <http://www.llnl.gov/linux/slurm/>.
*
* SLURM is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* SLURM is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License along
* with SLURM; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
\*****************************************************************************/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <errno.h>
#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
#ifndef __USE_XOPEN_EXTENDED
extern pid_t getsid(pid_t pid); /* missing from <unistd.h> */
#endif
#include <slurm/slurm.h>
#include "src/common/read_config.h"
#include "src/common/slurm_protocol_api.h"
static int _handle_rc_msg(slurm_msg_t *msg);
/*
* slurm_allocate_resources - allocate resources for a job request
* IN job_desc_msg - description of resource allocation request
* OUT slurm_alloc_msg - response to request
* RET 0 on success or slurm error code
* NOTE: free the allocated using slurm_free_resource_allocation_response_msg
*/
int
slurm_allocate_resources (job_desc_msg_t *req,
resource_allocation_response_msg_t **resp)
{
int rc;
slurm_msg_t req_msg;
slurm_msg_t resp_msg;
bool host_set = false;
char host[64];
/*
* set Node and session id for this request
*/
if (req->alloc_sid == NO_VAL)
req->alloc_sid = getsid(0);
if ( (req->alloc_node == NULL)
&& (getnodename(host, sizeof(host)) == 0) ) {
req->alloc_node = host;
host_set = true;
}
req_msg.msg_type = REQUEST_RESOURCE_ALLOCATION;
req_msg.data = req;
rc = slurm_send_recv_controller_msg(&req_msg, &resp_msg);
/*
* Clear this hostname if set internally to this function
* (memory is on the stack)
*/
if (host_set)
req->alloc_node = NULL;
if (rc == SLURM_SOCKET_ERROR)
return SLURM_SOCKET_ERROR;
slurm_free_cred(resp_msg.cred);
switch (resp_msg.msg_type) {
case RESPONSE_SLURM_RC:
if (_handle_rc_msg(&resp_msg) < 0)
return SLURM_PROTOCOL_ERROR;
*resp = NULL;
break;
case RESPONSE_RESOURCE_ALLOCATION:
*resp = (resource_allocation_response_msg_t *) resp_msg.data;
break;
default:
slurm_seterrno_ret(SLURM_UNEXPECTED_MSG_ERROR);
}
return SLURM_PROTOCOL_SUCCESS;
}
/*
* slurm_job_will_run - determine if a job would execute immediately if
* submitted now
* IN job_desc_msg - description of resource allocation request
* OUT slurm_alloc_msg - response to request
* RET 0 on success or slurm error code
* NOTE: free the allocated using slurm_free_resource_allocation_response_msg
*/
int slurm_job_will_run (job_desc_msg_t *req,
resource_allocation_response_msg_t **resp)
{
slurm_msg_t req_msg;
slurm_msg_t resp_msg;
/* req.immediate = true; implicit */
req_msg.msg_type = REQUEST_JOB_WILL_RUN;
req_msg.data = req;
if (slurm_send_recv_controller_msg(&req_msg, &resp_msg) < 0)
return SLURM_SOCKET_ERROR;
slurm_free_cred(resp_msg.cred);
switch (resp_msg.msg_type) {
case RESPONSE_SLURM_RC:
if (_handle_rc_msg(&resp_msg) < 0)
return SLURM_PROTOCOL_ERROR;
*resp = NULL;
break;
case RESPONSE_JOB_WILL_RUN:
*resp = (resource_allocation_response_msg_t *) resp_msg.data;
break;
default:
slurm_seterrno_ret(SLURM_UNEXPECTED_MSG_ERROR);
break ;
}
return SLURM_PROTOCOL_SUCCESS;
}
/*
* slurm_allocate_resources_and_run - allocate resources for a job request and
* initiate a job step
* IN job_desc_msg - description of resource allocation request
* OUT slurm_alloc_msg - response to request
* RET 0 on success or slurm error code
* NOTE: free the response using
* slurm_free_resource_allocation_and_run_response_msg
*/
int
slurm_allocate_resources_and_run (job_desc_msg_t *req,
resource_allocation_and_run_response_msg_t **resp)
{
int rc;
slurm_msg_t req_msg;
slurm_msg_t resp_msg;
bool host_set = false;
char host[64];
if (req->alloc_sid == NO_VAL)
req->alloc_sid = getsid(0);
if ( (req->alloc_node == NULL)
&& (getnodename(host, sizeof(host)) == 0) ) {
req->alloc_node = host;
host_set = true;
}
req_msg.msg_type = REQUEST_ALLOCATION_AND_RUN_JOB_STEP;
req_msg.data = req;
rc = slurm_send_recv_controller_msg(&req_msg, &resp_msg);
if (host_set) /* reset (clear) alloc_node */
req->alloc_node = NULL;
if (rc == SLURM_SOCKET_ERROR)
return SLURM_SOCKET_ERROR;
slurm_free_cred(resp_msg.cred);
switch (resp_msg.msg_type) {
case RESPONSE_SLURM_RC:
if (_handle_rc_msg(&resp_msg) < 0)
return SLURM_PROTOCOL_ERROR;
*resp = NULL;
break ;
case RESPONSE_ALLOCATION_AND_RUN_JOB_STEP:
*resp = (resource_allocation_and_run_response_msg_t *)
resp_msg.data;
break;
default:
slurm_seterrno_ret(SLURM_UNEXPECTED_MSG_ERROR);
break;
}
return SLURM_PROTOCOL_SUCCESS;
}
/*
* slurm_job_step_create - create a job step for a given job id
* IN slurm_step_alloc_req_msg - description of job step request
* OUT slurm_step_alloc_resp_msg - response to request
* RET 0 on success or slurm error code
* NOTE: free the response using slurm_free_job_step_create_response_msg
*/
int
slurm_job_step_create (job_step_create_request_msg_t *req,
job_step_create_response_msg_t **resp)
{
slurm_msg_t req_msg;
slurm_msg_t resp_msg;
req_msg.msg_type = REQUEST_JOB_STEP_CREATE;
req_msg.data = req;
if (slurm_send_recv_controller_msg(&req_msg, &resp_msg) < 0)
return SLURM_ERROR;
slurm_free_cred(resp_msg.cred);
switch (resp_msg.msg_type) {
case RESPONSE_SLURM_RC:
if (_handle_rc_msg(&resp_msg) < 0)
return SLURM_PROTOCOL_ERROR;
*resp = NULL;
break;
case RESPONSE_JOB_STEP_CREATE:
*resp = (job_step_create_response_msg_t *) resp_msg.data;
break;
default:
slurm_seterrno_ret(SLURM_UNEXPECTED_MSG_ERROR);
break;
}
return SLURM_PROTOCOL_SUCCESS ;
}
/*
* slurm_confirm_allocation - confirm an existing resource allocation
* IN job_desc_msg - description of existing job request
* OUT slurm_alloc_msg - response to request
* RET 0 on success or slurm error code
* NOTE: free the response using slurm_free_resource_allocation_response_msg
*/
int
slurm_confirm_allocation (old_job_alloc_msg_t *req,
resource_allocation_response_msg_t **resp)
{
slurm_msg_t req_msg;
slurm_msg_t resp_msg;
req_msg.msg_type = REQUEST_OLD_JOB_RESOURCE_ALLOCATION;
req_msg.data = req;
if (slurm_send_recv_controller_msg(&req_msg, &resp_msg) < 0)
return SLURM_ERROR;
slurm_free_cred(resp_msg.cred);
switch(resp_msg.msg_type) {
case RESPONSE_SLURM_RC:
if (_handle_rc_msg(&resp_msg) < 0)
return SLURM_ERROR;
*resp = NULL;
break;
case RESPONSE_RESOURCE_ALLOCATION:
*resp = (resource_allocation_response_msg_t *) resp_msg.data;
return SLURM_PROTOCOL_SUCCESS;
break;
default:
slurm_seterrno_ret(SLURM_UNEXPECTED_MSG_ERROR);
break;
}
return SLURM_PROTOCOL_SUCCESS;
}
/*
* Handle a return code message type.
* if return code is nonzero, sets errno to return code and returns < 0.
* Otherwise, returns 0 (SLURM_SUCCES)
*/
static int
_handle_rc_msg(slurm_msg_t *msg)
{
int rc = ((return_code_msg_t *) msg->data)->return_code;
slurm_free_return_code_msg(msg->data);
if (rc)
slurm_seterrno_ret(rc);
else
return SLURM_SUCCESS;
}