73 lines
1.8 KiB
C
73 lines
1.8 KiB
C
/*
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* Copyright (C) 2009 Tobias Brunner
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* Copyright (C) 2007 Martin Willi
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* Hochschule fuer Technik Rapperswil
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*/
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#ifndef COWFS_H
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#define COWFS_H
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#include <library.h>
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typedef struct cowfs_t cowfs_t;
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/**
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* cowfs - Copy on write FUSE filesystem.
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*
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*/
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struct cowfs_t {
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/**
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* Adds an additional copy on write overlay.
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*
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* If the path was already added as overlay, it is moved to the top.
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*
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* @param path path of the overlay
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* @return FALSE, if failed
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*/
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bool (*add_overlay)(cowfs_t *this, char *path);
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/**
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* Remove the specified copy on write overlay.
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*
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* @param path path of the overlay
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* @return FALSE, if not found
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*/
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bool (*del_overlay)(cowfs_t *this, char *path);
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/**
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* Remove the most recently added copy on write overlay.
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*
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* @return FALSE, if no overlay was found
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*/
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bool (*pop_overlay)(cowfs_t *this);
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/**
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* Stop, umount and destroy a cowfs FUSE filesystem.
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*/
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void (*destroy) (cowfs_t *this);
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};
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/**
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* Mount a cowfs FUSE filesystem.
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*
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* @param master read only master file system directory
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* @param host copy on write host directory
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* @param mount mountpoint where union is mounted
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* @return instance, or NULL if FUSE initialization failed
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*/
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cowfs_t *cowfs_create(char *master, char *host, char *mount);
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#endif /* COWFS_H */
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