57 строки
1.8 KiB
C
57 строки
1.8 KiB
C
/* -*- 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
|
|
|
|
struct ocfs2_extent_map_item {
|
|
unsigned int ei_cpos;
|
|
unsigned int ei_phys;
|
|
unsigned int ei_clusters;
|
|
unsigned int ei_flags;
|
|
|
|
struct list_head ei_list;
|
|
};
|
|
|
|
#define OCFS2_MAX_EXTENT_MAP_ITEMS 3
|
|
struct ocfs2_extent_map {
|
|
unsigned int em_num_items;
|
|
struct list_head em_list;
|
|
};
|
|
|
|
void ocfs2_extent_map_init(struct inode *inode);
|
|
void ocfs2_extent_map_trunc(struct inode *inode, unsigned int cluster);
|
|
void ocfs2_extent_map_insert_rec(struct inode *inode,
|
|
struct ocfs2_extent_rec *rec);
|
|
|
|
int ocfs2_get_clusters(struct inode *inode, u32 v_cluster, u32 *p_cluster,
|
|
u32 *num_clusters, unsigned int *extent_flags);
|
|
int ocfs2_extent_map_get_blocks(struct inode *inode, u64 v_blkno, u64 *p_blkno,
|
|
u64 *ret_count, unsigned int *extent_flags);
|
|
|
|
int ocfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
|
|
u64 map_start, u64 map_len);
|
|
|
|
#endif /* _EXTENT_MAP_H */
|