void ADIOI_PVFS2_Delete(const char *filename, int *error_code)
{
PVFS_credentials credentials;
PVFS_sysresp_getparent resp_getparent;
int ret;
PVFS_fs_id cur_fs;
static char myname[] = "ADIOI_PVFS2_DELETE";
char pvfs_path[PVFS_NAME_MAX] = {0};
ADIOI_PVFS2_Init(error_code);
/* --BEGIN ERROR HANDLING-- */
if (*error_code != MPI_SUCCESS)
{
/* ADIOI_PVFS2_INIT handles creating error codes itself */
return;
}
/* --END ERROR HANDLING-- */
/* in most cases we'll store the credentials in the fs struct, but we don't
* have one of those in Delete */
ADIOI_PVFS2_makecredentials(&credentials);
/* given the filename, figure out which pvfs filesystem it is on */
ret = PVFS_util_resolve(filename, &cur_fs, pvfs_path, PVFS_NAME_MAX);
/* --BEGIN ERROR HANDLING-- */
if (ret != 0) {
*error_code = MPIO_Err_create_code(MPI_SUCCESS,
MPIR_ERR_RECOVERABLE,
myname, __LINE__,
ADIOI_PVFS2_error_convert(ret),
"Error in PVFS_util_resolve", 0);
return;
}
/* --END ERROR HANDLING-- */
ret = PVFS_sys_getparent(cur_fs, pvfs_path, &credentials, &resp_getparent);
ret = PVFS_sys_remove(resp_getparent.basename,
resp_getparent.parent_ref, &credentials);
/* --BEGIN ERROR HANDLING-- */
if (ret != 0) {
*error_code = MPIO_Err_create_code(MPI_SUCCESS,
MPIR_ERR_RECOVERABLE,
myname, __LINE__,
ADIOI_PVFS2_error_convert(ret),
"Error in PVFS_sys_remove", 0);
return;
}
/* --END ERROR HANDLING-- */
*error_code = MPI_SUCCESS;
return;
}
/* ADIOI_PVFS2_Open:
* one process opens (or creates) the file, then broadcasts the result to the
* remaining processors.
*
* ADIO_Open used to perform an optimization when MPI_MODE_CREATE (and before
* that, MPI_MODE_EXCL) was set. Because PVFS2 handles file lookup and
* creation more scalably than other file systems, ADIO_Open now skips any
* special handling when CREATE is set. */
void ADIOI_PVFS2_Open(ADIO_File fd, int *error_code)
{
int rank, ret;
PVFS_fs_id cur_fs;
static char myname[] = "ADIOI_PVFS2_OPEN";
char pvfs_path[PVFS_NAME_MAX] = {0};
ADIOI_PVFS2_fs *pvfs2_fs;
/* since one process is doing the open, that means one process is also
* doing the error checking. define a struct for both the object reference
* and the error code to broadcast to all the processors */
open_status o_status = {0, {0, 0}};
MPI_Datatype open_status_type;
MPI_Datatype types[2] = {MPI_INT, MPI_BYTE};
int lens[2] = {1, sizeof(PVFS_object_ref)};
MPI_Aint offsets[2];
pvfs2_fs = (ADIOI_PVFS2_fs *) ADIOI_Malloc(sizeof(ADIOI_PVFS2_fs));
/* --BEGIN ERROR HANDLING-- */
if (pvfs2_fs == NULL) {
*error_code = MPIO_Err_create_code(MPI_SUCCESS,
MPIR_ERR_RECOVERABLE,
myname, __LINE__,
MPI_ERR_UNKNOWN,
"Error allocating memory", 0);
return;
}
/* --END ERROR HANDLING-- */
MPI_Comm_rank(fd->comm, &rank);
ADIOI_PVFS2_Init(error_code);
if (*error_code != MPI_SUCCESS)
{
/* ADIOI_PVFS2_INIT handles creating error codes on its own */
return;
}
/* currently everyone gets their own credentials */
ADIOI_PVFS2_makecredentials(&(pvfs2_fs->credentials));
/* one process resolves name and will later bcast to others */
if (rank == fd->hints->ranklist[0] && fd->fs_ptr == NULL) {
/* given the filename, figure out which pvfs filesystem it is on */
ret = PVFS_util_resolve(fd->filename, &cur_fs,
pvfs_path, PVFS_NAME_MAX);
if (ret < 0 ) {
PVFS_perror("PVFS_util_resolve", ret);
/* TODO: pick a good error for this */
o_status.error = -1;
} else {
fake_an_open(cur_fs, pvfs_path,
fd->access_mode, fd->hints->striping_factor,
fd->hints->striping_unit,
pvfs2_fs, &o_status);
}
/* store credentials and object reference in fd */
pvfs2_fs->object_ref = o_status.object_ref;
fd->fs_ptr = pvfs2_fs;
}
/* broadcast status and (possibly valid) object reference */
MPI_Address(&o_status.error, &offsets[0]);
MPI_Address(&o_status.object_ref, &offsets[1]);
MPI_Type_struct(2, lens, offsets, types, &open_status_type);
MPI_Type_commit(&open_status_type);
/* Assertion: if we hit this Bcast, then all processes collectively
* called this open.
*
* That's because deferred open never happens with PVFS2.
*/
MPI_Bcast(MPI_BOTTOM, 1, open_status_type, fd->hints->ranklist[0],
fd->comm);
MPI_Type_free(&open_status_type);
/* --BEGIN ERROR HANDLING-- */
if (o_status.error != 0)
{
ADIOI_Free(pvfs2_fs);
*error_code = MPIO_Err_create_code(MPI_SUCCESS,
MPIR_ERR_RECOVERABLE,
myname, __LINE__,
ADIOI_PVFS2_error_convert(o_status.error),
"Unknown error", 0);
/* TODO: FIX STRING */
return;
}
/* --END ERROR HANDLING-- */
pvfs2_fs->object_ref = o_status.object_ref;
fd->fs_ptr = pvfs2_fs;
*error_code = MPI_SUCCESS;
return;
}