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/*
* Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
* University Research and Technology
* Corporation. All rights reserved.
* Copyright (c) 2004-2017 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 (c) 2013-2018 University of Houston. All rights reserved.
* Copyright (c) 2015-2018 Research Organization for Information Science
* and Technology (RIST). All rights reserved.
* Copyright (c) 2016-2017 IBM Corporation. All rights reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*/
#include "ompi_config.h"
#include "sharedfp_lockedfile.h"
#include "mpi.h"
#include "ompi/constants.h"
#include "ompi/group/group.h"
#include "ompi/proc/proc.h"
#include "ompi/mca/sharedfp/sharedfp.h"
#include "ompi/mca/sharedfp/base/base.h"
#ifdef HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
#include <fcntl.h>
#include <unistd.h>
#include "opal/util/output.h"
#include "opal/util/opal_getcwd.h"
#include "opal/util/path.h"
#include "opal/util/os_path.h"
int mca_sharedfp_lockedfile_file_open (struct ompi_communicator_t *comm,
const char* filename,
int amode,
struct opal_info_t *info,
ompio_file_t *fh)
{
int err = MPI_SUCCESS;
char * lockedfilename;
int handle;
struct mca_sharedfp_lockedfile_data * module_data = NULL;
struct mca_sharedfp_base_data_t* sh;
pid_t my_pid;
int int_pid;
/*Memory is allocated here for the sh structure*/
sh = (struct mca_sharedfp_base_data_t*)malloc(sizeof(struct mca_sharedfp_base_data_t));
if ( NULL == sh){
opal_output(0, "mca_sharedfp_lockedfile_file_open: Error, unable to malloc f_sharedfp struct\n");
return OMPI_ERR_OUT_OF_RESOURCE;
}
/*Populate the sh file structure based on the implementation*/
sh->global_offset = 0; /* Global Offset*/
sh->selected_module_data = NULL;
/*Open a new file which will maintain the pointer for this file open*/
if ( mca_sharedfp_lockedfile_verbose ) {
opal_output(ompi_sharedfp_base_framework.framework_output,
"mca_sharedfp_lockedfile_file_open: open locked file.\n");
}
module_data = (struct mca_sharedfp_lockedfile_data*)malloc(sizeof(struct mca_sharedfp_lockedfile_data));
if ( NULL == module_data ) {
opal_output(ompi_sharedfp_base_framework.framework_output,
"mca_sharedfp_lockedfile_file_open: Error, unable to malloc lockedfile_data struct\n");
free (sh);
return OMPI_ERR_OUT_OF_RESOURCE;
}
opal_jobid_t masterjobid;
if ( 0 == comm->c_my_rank ) {
ompi_proc_t *masterproc = ompi_group_peer_lookup(comm->c_local_group, 0 );
masterjobid = OMPI_CAST_RTE_NAME(&masterproc->super.proc_name)->jobid;
}
err = comm->c_coll->coll_bcast ( &masterjobid, 1, MPI_UNSIGNED, 0, comm,
comm->c_coll->coll_bcast_module );
if ( OMPI_SUCCESS != err ) {
opal_output(0, "[%d]mca_sharedfp_lockedfile_file_open: Error in bcast operation\n", fh->f_rank);
free (sh);
free(module_data);
return err;
}
if ( 0 == fh->f_rank ) {
my_pid = getpid();
int_pid = (int) my_pid;
}
err = comm->c_coll->coll_bcast (&int_pid, 1, MPI_INT, 0, comm, comm->c_coll->coll_bcast_module );
if ( OMPI_SUCCESS != err ) {
opal_output(0, "[%d]mca_sharedfp_lockedfile_file_open: Error in bcast operation\n", fh->f_rank);
free (sh);
free(module_data);
return err;
}
size_t filenamelen = strlen(filename) + 24;
lockedfilename = (char*)malloc(sizeof(char) * filenamelen);
if ( NULL == lockedfilename ) {
free (sh);
free (module_data);
return OMPI_ERR_OUT_OF_RESOURCE;
}
snprintf(lockedfilename, filenamelen, "%s-%u-%d%s",filename,masterjobid,int_pid,".lock");
if (opal_path_is_absolute(lockedfilename) ) {
module_data->filename = lockedfilename;
} else {
char path[OPAL_PATH_MAX];
err = opal_getcwd(path, OPAL_PATH_MAX);
if (OPAL_SUCCESS != err) {
free (sh);
free (module_data);
free (lockedfilename);
return err;
}
module_data->filename = opal_os_path(0, path, lockedfilename, NULL);
if (NULL == module_data->filename){
free (sh);
free (module_data);
free (lockedfilename);
return OMPI_ERROR;
}
}
/*-------------------------------------------------*/
/*Open the lockedfile without shared file pointer */
/*-------------------------------------------------*/
if ( 0 == comm->c_my_rank ) {
OMPI_MPI_OFFSET_TYPE position=0;
/*only let main process initialize file pointer,
*therefore there is no need to lock the file
*/
handle = open ( lockedfilename, O_RDWR | O_CREAT, 0644 );
if ( -1 == handle ){
opal_output(0, "[%d]mca_sharedfp_lockedfile_file_open: Error during file open\n",
fh->f_rank);
free (sh);
free (module_data);
free (lockedfilename);
return OMPI_ERROR;
}
err = opal_best_effort_write (handle, &position, sizeof(OMPI_MPI_OFFSET_TYPE));
if (OPAL_SUCCESS != err) {
free (sh);
free (module_data);
free (lockedfilename);
close (handle);
return err;
}
close (handle);
}
err = comm->c_coll->coll_barrier ( comm, comm->c_coll->coll_barrier_module );
if ( OMPI_SUCCESS != err ) {
opal_output(0, "[%d]mca_sharedfp_lockedfile_file_open: Error in barrier operation\n", fh->f_rank);
free (sh);
free(module_data);
free (lockedfilename);
return err;
}
handle = open ( lockedfilename, O_RDWR, 0644 );
if ( -1 == handle ) {
opal_output(0, "[%d]mca_sharedfp_lockedfile_file_open: Error during file open\n",
fh->f_rank);
free (sh);
free(module_data);
free (lockedfilename);
return OMPI_ERROR;
}
/*Store the new file handle*/
module_data->handle = handle;
/* Assign the lockedfile_data to sh->handle*/
sh->selected_module_data = module_data;
/*remember the shared file handle*/
fh->f_sharedfp_data = sh;
return comm->c_coll->coll_barrier ( comm, comm->c_coll->coll_barrier_module );
}
int mca_sharedfp_lockedfile_file_close (ompio_file_t *fh)
{
int err = OMPI_SUCCESS;
struct mca_sharedfp_lockedfile_data * module_data = NULL;
struct mca_sharedfp_base_data_t *sh;
if ( fh->f_sharedfp_data==NULL){
return OMPI_SUCCESS;
}
sh = fh->f_sharedfp_data;
module_data = (lockedfile_data_global*)(sh->selected_module_data);
if ( module_data) {
/*Close lockedfile handle*/
if ( module_data->handle) {
close (module_data->handle );
if ( 0 == fh->f_rank ) {
unlink ( module_data->filename);
}
}
if ( NULL != module_data->filename ){
free ( module_data->filename);
}
free ( module_data );
}
/*free shared file pointer data struct*/
free(sh);
return err;
}
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