Blackfin SPI Driver: tweak magic spi dma sequence to get it working on BF54x
[linux-2.6/mini2440.git] / fs / ocfs2 / extent_map.h
blobb7dd9731b4629a942d10c44472d925dc49738fa7
1 /* -*- mode: c; c-basic-offset: 8; -*-
2 * vim: noexpandtab sw=8 ts=8 sts=0:
4 * extent_map.h
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.
25 #ifndef _EXTENT_MAP_H
26 #define _EXTENT_MAP_H
28 struct ocfs2_extent_map_item {
29 unsigned int ei_cpos;
30 unsigned int ei_phys;
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 int ocfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
54 u64 map_start, u64 map_len);
56 int ocfs2_xattr_get_clusters(struct inode *inode, u32 v_cluster,
57 u32 *p_cluster, u32 *num_clusters,
58 struct ocfs2_extent_list *el);
60 int ocfs2_read_virt_blocks(struct inode *inode, u64 v_block, int nr,
61 struct buffer_head *bhs[], int flags,
62 int (*validate)(struct super_block *sb,
63 struct buffer_head *bh));
64 static inline int ocfs2_read_virt_block(struct inode *inode, u64 v_block,
65 struct buffer_head **bh,
66 int (*validate)(struct super_block *sb,
67 struct buffer_head *bh))
69 int status = 0;
71 if (bh == NULL) {
72 printk("ocfs2: bh == NULL\n");
73 status = -EINVAL;
74 goto bail;
77 status = ocfs2_read_virt_blocks(inode, v_block, 1, bh, 0, validate);
79 bail:
80 return status;
84 #endif /* _EXTENT_MAP_H */