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sharedfp_sm_file_component_query: add file open to ensure correct ope… #9784

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Dec 22, 2021
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sharedfp_sm_file_component_query: add file open to ensure correct ope… #9784

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25 changes: 24 additions & 1 deletion ompi/mca/sharedfp/sm/sharedfp_sm.c
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Original file line number Diff line number Diff line change
Expand Up @@ -9,7 +9,7 @@
* University of Stuttgart. All rights reserved.
* Copyright (c) 2004-2005 The Regents of the University of California.
* All rights reserved.
* Copyright (c) 2008-2013 University of Houston. All rights reserved.
* Copyright (c) 2008-2021 University of Houston. All rights reserved.
* Copyright (c) 2018 Research Organization for Information Science
* and Technology (RIST). All rights reserved.
* $COPYRIGHT$
Expand Down Expand Up @@ -94,6 +94,29 @@ struct mca_sharedfp_base_module_1_0_0_t * mca_sharedfp_sm_component_file_query(o
return NULL;
}
}


/* Check that we can actually open the required file */
char *filename_basename = basename((char*)fh->f_filename);
char *sm_filename;
int comm_cid = -1;
int pid = ompi_comm_rank (comm);

asprintf(&sm_filename, "%s/%s_cid-%d-%d.sm", ompi_process_info.job_session_dir,
filename_basename, comm_cid, pid);

int sm_fd = open(sm_filename, O_RDWR | O_CREAT,
S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
if ( sm_fd == -1){
/*error opening file*/
opal_output(0,"mca_sharedfp_sm_component_file_query: Error, unable to open file for mmap: %s\n",sm_filename);
free(sm_filename);
return NULL;
}
close (sm_fd);
unlink(sm_filename);
free (sm_filename);

/* This module can run */
*priority = mca_sharedfp_sm_priority;
return &sm;
Expand Down