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/* -*- mode: c; c-basic-offset: 8; -*-
* vim: noexpandtab sw=8 ts=8 sts=0:
*
* extent_map.h
*
* In-memory file extent mappings for OCFS2.
*
* Copyright (C) 2004 Oracle. All rights reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public
* License, version 2, as published by the Free Software Foundation.
*
* 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 General Public
* License along with this program; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 021110-1307, USA.
*/
#ifndef _EXTENT_MAP_H
#define _EXTENT_MAP_H
int init_ocfs2_extent_maps(void);
void exit_ocfs2_extent_maps(void);
/*
* EVERY CALL here except _init, _trunc, and _drop expects alloc_sem
* to be held. The allocation cannot change at all while the map is
* in the process of being updated.
*/
int ocfs2_extent_map_init(struct inode *inode);
int ocfs2_extent_map_append(struct inode *inode,
struct ocfs2_extent_rec *rec,
u32 new_clusters);
int ocfs2_extent_map_get_blocks(struct inode *inode,
u64 v_blkno, int count,
u64 *p_blkno, int *ret_count);
int ocfs2_extent_map_drop(struct inode *inode, u32 new_clusters);
int ocfs2_extent_map_trunc(struct inode *inode, u32 new_clusters);
#endif /* _EXTENT_MAP_H */
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