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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) 2008-2018 University of Houston. All rights reserved.
* Copyright (c) 2015-2020 Research Organization for Information Science
* and Technology (RIST). All rights reserved.
* Copyright (c) 2016-2017 IBM Corporation. All rights reserved.
* Copyright (c) 2024 Advanced Micro Devices, Inc. All rights reserverd.
* $COPYRIGHT$
*
* 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/mca/fs/base/base.h"
#include "ompi/communicator/communicator.h"
#include "ompi/info/info.h"
#include <sys/ioctl.h>
static void *alloc_lum(void);
static void *alloc_lum(void)
{
int v1, v3;
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 opal_info_t *info,
ompio_file_t *fh)
{
int amode, perm;
int rc, ret=OMPI_SUCCESS;
int flag;
int fs_lustre_stripe_size = -1;
int fs_lustre_stripe_width = -1;
opal_cstring_t *stripe_str;
char *rfilename = (char *)filename;
struct lov_user_md *lump=NULL;
perm = mca_fs_base_get_file_perm(fh);
amode = mca_fs_base_get_file_amode(fh->f_rank, access_mode);
opal_info_get (info, "striping_unit", &stripe_str, &flag);
if ( flag ) {
sscanf ( stripe_str->string, "%d", &fs_lustre_stripe_size );
OBJ_RELEASE(stripe_str);
}
else {
//internal info object name used earlier. Kept for backwards compatibility.
opal_info_get (info, "stripe_size", &stripe_str, &flag);
if ( flag ) {
sscanf ( stripe_str->string, "%d", &fs_lustre_stripe_size );
OBJ_RELEASE(stripe_str);
}
}
opal_info_get (info, "striping_factor", &stripe_str, &flag);
if ( flag ) {
sscanf ( stripe_str->string, "%d", &fs_lustre_stripe_width );
OBJ_RELEASE(stripe_str);
}
else {
//internal info object name used earlier. Kept for backwards compatibility.
opal_info_get (info, "stripe_width", &stripe_str, &flag);
if ( flag ) {
sscanf ( stripe_str->string, "%d", &fs_lustre_stripe_width );
OBJ_RELEASE(stripe_str);
}
}
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;
}
/* Check for soft links and replace filename by the actual
file used in case it is a soft link */
if (mca_fs_base_is_link(filename)) {
mca_fs_base_get_real_filename(filename, &rfilename);
/* make sure the real file is also on a Lustre file system */
if (LUSTRE != mca_fs_base_get_fstype(rfilename)) {
opal_output(1, "cannot use a soft-link between a LUSTRE and non-LUSTRE file system\n");
return OPAL_ERROR;
}
}
/* Reset errno */
errno = 0;
if (OMPIO_ROOT == fh->f_rank) {
if ( (fs_lustre_stripe_size>0 || fs_lustre_stripe_width>0) &&
( amode&O_CREAT) &&
( (amode&O_RDWR)|| amode&O_WRONLY) ) {
/* this cannot be a soft-link since we are creating the file.
Not using rfilename here */
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, amode | O_LOV_DELAY_CREATE, perm);
}
else {
fh->fd = open (filename, amode, perm);
}
if ( 0 > fh->fd ) {
ret = mca_fs_base_get_mpi_err(errno);
}
}
comm->c_coll->coll_bcast ( &ret, 1, MPI_INT, 0, comm, comm->c_coll->coll_bcast_module);
if ( OMPI_SUCCESS != ret ) {
fh->fd = -1;
return ret;
}
if (OMPIO_ROOT != fh->f_rank) {
fh->fd = open (filename, amode, perm);
if ( 0 > fh->fd) {
return mca_fs_base_get_mpi_err(errno);
}
}
lump = alloc_lum();
if (NULL == lump) {
fprintf(stderr,"Cannot allocate memory for extracting stripe size\n");
return OMPI_ERROR;
}
rc = llapi_file_get_stripe(rfilename, lump);
if (rc != 0) {
opal_output(1, "get_stripe failed: %d (%s)\n", errno, strerror(errno));
free(lump);
return OMPI_ERROR;
}
fh->f_stripe_size = lump->lmm_stripe_size;
fh->f_stripe_count = lump->lmm_stripe_count;
fh->f_fs_block_size = lump->lmm_stripe_size;
free(lump);
if (FS_LUSTRE_LOCK_AUTO == mca_fs_lustre_lock_algorithm ||
FS_LUSTRE_LOCK_NEVER == mca_fs_lustre_lock_algorithm ) {
fh->f_flags |= OMPIO_LOCK_NEVER;
}
else if (FS_LUSTRE_LOCK_ENTIRE_FILE == mca_fs_lustre_lock_algorithm) {
fh->f_flags |= OMPIO_LOCK_ENTIRE_FILE;
}
else if (FS_LUSTRE_LOCK_RANGES == mca_fs_lustre_lock_algorithm) {
/* Nothing to be done. This is what the posix fbtl component would do
anyway without additional information . */
}
else {
opal_output ( 1, "Invalid value for mca_fs_lustre_lock_algorithm %d", mca_fs_lustre_lock_algorithm );
}
return OMPI_SUCCESS;
}
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