137 строки
3.9 KiB
C
137 строки
3.9 KiB
C
/*
|
|
* 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) 2008-2014 University of Houston. All rights reserved.
|
|
* Copyright (c) 2015 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 "fs_ufs.h"
|
|
|
|
#include <fcntl.h>
|
|
#include <sys/stat.h>
|
|
#include "mpi.h"
|
|
#include "ompi/constants.h"
|
|
#include "ompi/mca/fs/base/base.h"
|
|
#include "ompi/mca/fs/fs.h"
|
|
#include "ompi/communicator/communicator.h"
|
|
#include "ompi/info/info.h"
|
|
#include "opal/util/path.h"
|
|
|
|
/*
|
|
* file_open_ufs
|
|
*
|
|
* Function: - opens a new file
|
|
* Accepts: - same arguments as MPI_File_open()
|
|
* Returns: - Success if new file handle
|
|
*/
|
|
int
|
|
mca_fs_ufs_file_open (struct ompi_communicator_t *comm,
|
|
const char* filename,
|
|
int access_mode,
|
|
struct opal_info_t *info,
|
|
mca_io_ompio_file_t *fh)
|
|
{
|
|
int amode;
|
|
int old_mask, perm;
|
|
int rank, ret;
|
|
|
|
rank = ompi_comm_rank ( comm );
|
|
|
|
if (fh->f_perm == OMPIO_PERM_NULL) {
|
|
old_mask = umask(022);
|
|
umask(old_mask);
|
|
perm = old_mask ^ 0666;
|
|
}
|
|
else {
|
|
perm = fh->f_perm;
|
|
}
|
|
|
|
amode = 0;
|
|
|
|
if (access_mode & MPI_MODE_RDONLY)
|
|
amode = amode | O_RDONLY;
|
|
if (access_mode & MPI_MODE_WRONLY)
|
|
amode = amode | O_WRONLY;
|
|
if (access_mode & MPI_MODE_RDWR)
|
|
amode = amode | O_RDWR;
|
|
|
|
if ( 0 == rank ) {
|
|
/* MODE_CREATE and MODE_EXCL can only be set by one process */
|
|
if ( !(fh->f_flags & OMPIO_SHAREDFP_IS_SET)) {
|
|
if ( access_mode & MPI_MODE_CREATE )
|
|
amode = amode | O_CREAT;
|
|
if (access_mode & MPI_MODE_EXCL)
|
|
amode = amode | O_EXCL;
|
|
}
|
|
fh->fd = open (filename, amode, perm);
|
|
ret = fh->fd;
|
|
}
|
|
|
|
comm->c_coll->coll_bcast ( &ret, 1, MPI_INT, 0, comm, comm->c_coll->coll_bcast_module);
|
|
if ( -1 == ret ) {
|
|
fh->fd = ret;
|
|
return OMPI_ERROR;
|
|
}
|
|
if ( 0 != rank ) {
|
|
fh->fd = open (filename, amode, perm);
|
|
if (-1 == fh->fd) {
|
|
return OMPI_ERROR;
|
|
}
|
|
}
|
|
|
|
fh->f_stripe_size=0;
|
|
fh->f_stripe_count=1;
|
|
/* Need to find a way to determine the file system block size at run time.
|
|
4096 is the most common value, but it might not always be accurate.
|
|
*/
|
|
fh->f_fs_block_size = 4096;
|
|
|
|
/* Need to check for NFS here. If the file system is not NFS but a regular UFS file system,
|
|
we do not need to enforce locking. A regular XFS or EXT4 file system can only be used
|
|
within a single node, local environment, and in this case the OS will already ensure correct
|
|
handling of file system blocks;
|
|
*/
|
|
|
|
char *fstype=NULL;
|
|
bool bret = opal_path_nfs ( (char *)filename, &fstype );
|
|
|
|
if ( false == bret ) {
|
|
char *dir;
|
|
mca_fs_base_get_parent_dir ( (char *)filename, &dir );
|
|
bret = opal_path_nfs (dir, &fstype);
|
|
free(dir);
|
|
}
|
|
|
|
if ( true == bret ) {
|
|
if ( 0 == strncasecmp(fstype, "nfs", sizeof("nfs")) ) {
|
|
/* Nothing really to be done in this case. Locking can stay */
|
|
}
|
|
else {
|
|
fh->f_flags |= OMPIO_LOCK_NEVER;
|
|
}
|
|
}
|
|
else {
|
|
fh->f_flags |= OMPIO_LOCK_NEVER;
|
|
}
|
|
free (fstype);
|
|
|
|
return OMPI_SUCCESS;
|
|
}
|