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git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blob - fs/ocfs2/extent_map.h
1 /* -*- mode: c; c-basic-offset: 8; -*-
2 * vim: noexpandtab sw=8 ts=8 sts=0:
6 * In-memory file extent mappings for OCFS2.
8 * Copyright (C) 2004 Oracle. All rights reserved.
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public
12 * License, version 2, as published by the Free Software Foundation.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
19 * You should have received a copy of the GNU General Public
20 * License along with this program; if not, write to the
21 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
22 * Boston, MA 021110-1307, USA.
28 struct ocfs2_extent_map_item
{
31 unsigned int ei_clusters
;
32 unsigned int ei_flags
;
34 struct list_head ei_list
;
37 #define OCFS2_MAX_EXTENT_MAP_ITEMS 3
38 struct ocfs2_extent_map
{
39 unsigned int em_num_items
;
40 struct list_head em_list
;
43 void ocfs2_extent_map_init(struct inode
*inode
);
44 void ocfs2_extent_map_trunc(struct inode
*inode
, unsigned int cluster
);
45 void ocfs2_extent_map_insert_rec(struct inode
*inode
,
46 struct ocfs2_extent_rec
*rec
);
48 int ocfs2_get_clusters(struct inode
*inode
, u32 v_cluster
, u32
*p_cluster
,
49 u32
*num_clusters
, unsigned int *extent_flags
);
50 int ocfs2_extent_map_get_blocks(struct inode
*inode
, u64 v_blkno
, u64
*p_blkno
,
51 u64
*ret_count
, unsigned int *extent_flags
);
53 #endif /* _EXTENT_MAP_H */