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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) 2004-2011 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) 2008-2015 University of Houston. All rights reserved.
* Copyright (c) 2015 Research Organization for Information Science
* and Technology (RIST). All rights reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*/
#include "ompi_config.h"
#include "fs_lustre.h"
#include <fcntl.h>
#include <unistd.h>
#include "mpi.h"
#include "ompi/constants.h"
#include "ompi/mca/fs/fs.h"
#include "ompi/communicator/communicator.h"
#include "ompi/info/info.h"
#include <sys/ioctl.h>
static void *alloc_lum();
static void *alloc_lum()
{
int v1, v3, join;
v1 = sizeof(struct lov_user_md_v1) +
LOV_MAX_STRIPE_COUNT * sizeof(struct lov_user_ost_data_v1);
v3 = sizeof(struct lov_user_md_v3) +
LOV_MAX_STRIPE_COUNT * sizeof(struct lov_user_ost_data_v1);
return malloc(MAX(v1, v3));
}
/*
* file_open_lustre
*
* Function: - opens a new file
* Accepts: - same arguments as MPI_File_open()
* Returns: - Success if new file handle
*/
int
mca_fs_lustre_file_open (struct ompi_communicator_t *comm,
const char* filename,
int access_mode,
struct ompi_info_t *info,
mca_io_ompio_file_t *fh)
{
int amode;
int old_mask, perm;
int rc;
int flag;
int fs_lustre_stripe_size = -1;
int fs_lustre_stripe_width = -1;
char char_stripe[MPI_MAX_INFO_KEY];
struct lov_user_md *lump=NULL;
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_CREATE)
amode = amode | O_CREAT;
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 (access_mode & MPI_MODE_EXCL)
amode = amode | O_EXCL;
ompi_info_get (info, "stripe_size", MPI_MAX_INFO_VAL, char_stripe, &flag);
if ( flag ) {
sscanf ( char_stripe, "%d", &fs_lustre_stripe_size );
}
ompi_info_get (info, "stripe_width", MPI_MAX_INFO_VAL, char_stripe, &flag);
if ( flag ) {
sscanf ( char_stripe, "%d", &fs_lustre_stripe_width );
}
if (fs_lustre_stripe_size < 0) {
fs_lustre_stripe_size = mca_fs_lustre_stripe_size;
}
if (fs_lustre_stripe_width < 0) {
fs_lustre_stripe_width = mca_fs_lustre_stripe_width;
}
if ( (fs_lustre_stripe_size>0 || fs_lustre_stripe_width>0) &&
(amode&O_CREAT) && (amode&O_RDWR)) {
if (0 == fh->f_rank) {
llapi_file_create(filename,
fs_lustre_stripe_size,
-1, /* MSC need to change that */
fs_lustre_stripe_width,
0); /* MSC need to change that */
fh->fd = open(filename, O_CREAT | O_RDWR | O_LOV_DELAY_CREATE, perm);
if (fh->fd < 0) {
fprintf(stderr, "Can't open %s file: %d (%s)\n",
filename, errno, strerror(errno));
return OMPI_ERROR;
}
close (fh->fd);
}
fh->f_comm->c_coll.coll_barrier (fh->f_comm,
fh->f_comm->c_coll.coll_barrier_module);
}
fh->fd = open (filename, amode, perm);
if (fh->fd < 0) {
opal_output(1, "error opening file %s\n", filename);
return OMPI_ERROR;
}
if (mca_fs_lustre_stripe_size > 0) {
fh->f_stripe_size = mca_fs_lustre_stripe_size;
}
else {
lump = alloc_lum();
if (NULL == lump ){
fprintf(stderr,"Cannot allocate memory for extracting stripe size\n");
return OMPI_ERROR;
}
rc = llapi_file_get_stripe(filename, lump);
if (rc != 0) {
opal_output(1, "get_stripe failed: %d (%s)\n", errno, strerror(errno));
return OMPI_ERROR;
}
fh->f_stripe_size = lump->lmm_stripe_size;
// if ( NULL != lump ) {
// free ( lump );
// }
}
return OMPI_SUCCESS;
}
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