/*******************************************************************************
* This file is part of SWIFT.
* Copyright (c) 2025 Peter W. Draper (p.w.draper@durham.ac.uk)
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see .
*
******************************************************************************/
#ifndef SWIFT_LUSTRE_API_H
#define SWIFT_LUSTRE_API_H
/* For size_t and FILE. */
#include
/* Structure to store information about an OST. */
struct swift_ost_info {
int index; /* OST index */
size_t size; /* Size in bytes */
size_t used; /* Used in bytes */
};
/* Structure to store a scan of all the OSTs for a mount point. */
struct swift_ost_store {
struct swift_ost_info *infos;
int count; /* Count of active OSTs */
int fullcount; /* Count of OSTs available (only different when culled) */
int size; /* Space available for storing OST infos */
};
/* Public functions. */
/* OST scanning and selection. */
void swift_ost_select(struct swift_ost_store *ost_infos, const char *path,
int minfree, int writetest, int verbose);
int swift_ost_scan(const char *path, struct swift_ost_store *ost_infos);
void swift_ost_cull(struct swift_ost_store *ost_infos, int minfree);
void swift_ost_remove(struct swift_ost_store *ost_infos, int index);
int swift_ost_next(struct swift_ost_store *ost_infos, int *arrayindex,
int count);
/* OST store. */
void swift_ost_store_init(struct swift_ost_store *ost_infos);
void swift_ost_store_alloc(struct swift_ost_store *ost_infos, int size);
void swift_ost_store_copy(struct swift_ost_store *ost_infos_src,
struct swift_ost_store *ost_infos_dst);
void swift_ost_store_free(struct swift_ost_store *ost_infos);
void swift_ost_store_print(struct swift_ost_store *ost_infos, int verbose);
void swift_ost_store_write(FILE *file, struct swift_ost_store *ost_infos);
/* File striping. */
int swift_create_striped_file(const char *filename, int offset, int count,
int *usedoffset);
#endif /* SWIFT_LUSTRE_API_H */