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47 lines
1.6 KiB
C
47 lines
1.6 KiB
C
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/* -*- mode: c; c-basic-offset: 8; -*-
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* vim: noexpandtab sw=8 ts=8 sts=0:
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*
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* extent_map.h
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*
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* In-memory file extent mappings for OCFS2.
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*
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* Copyright (C) 2004 Oracle. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License, version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 021110-1307, USA.
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*/
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#ifndef _EXTENT_MAP_H
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#define _EXTENT_MAP_H
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int init_ocfs2_extent_maps(void);
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void exit_ocfs2_extent_maps(void);
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/*
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* EVERY CALL here except _init, _trunc, and _drop expects alloc_sem
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* to be held. The allocation cannot change at all while the map is
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* in the process of being updated.
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*/
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int ocfs2_extent_map_init(struct inode *inode);
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int ocfs2_extent_map_append(struct inode *inode,
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struct ocfs2_extent_rec *rec,
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u32 new_clusters);
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int ocfs2_extent_map_get_blocks(struct inode *inode,
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u64 v_blkno, int count,
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u64 *p_blkno, int *ret_count);
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int ocfs2_extent_map_drop(struct inode *inode, u32 new_clusters);
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int ocfs2_extent_map_trunc(struct inode *inode, u32 new_clusters);
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#endif /* _EXTENT_MAP_H */
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