Root/fs/ocfs2/aops.h

1/* -*- mode: c; c-basic-offset: 8; -*-
2 * vim: noexpandtab sw=8 ts=8 sts=0:
3 *
4 * Copyright (C) 2002, 2004, 2005 Oracle. All rights reserved.
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public
17 * License along with this program; if not, write to the
18 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 * Boston, MA 021110-1307, USA.
20 */
21
22#ifndef OCFS2_AOPS_H
23#define OCFS2_AOPS_H
24
25int ocfs2_prepare_write_nolock(struct inode *inode, struct page *page,
26                   unsigned from, unsigned to);
27
28handle_t *ocfs2_start_walk_page_trans(struct inode *inode,
29                             struct page *page,
30                             unsigned from,
31                             unsigned to);
32
33int ocfs2_map_page_blocks(struct page *page, u64 *p_blkno,
34              struct inode *inode, unsigned int from,
35              unsigned int to, int new);
36
37void ocfs2_unlock_and_free_pages(struct page **pages, int num_pages);
38
39int walk_page_buffers( handle_t *handle,
40            struct buffer_head *head,
41            unsigned from,
42            unsigned to,
43            int *partial,
44            int (*fn)( handle_t *handle,
45                    struct buffer_head *bh));
46
47int ocfs2_write_end_nolock(struct address_space *mapping,
48               loff_t pos, unsigned len, unsigned copied,
49               struct page *page, void *fsdata);
50
51int ocfs2_write_begin_nolock(struct address_space *mapping,
52                 loff_t pos, unsigned len, unsigned flags,
53                 struct page **pagep, void **fsdata,
54                 struct buffer_head *di_bh, struct page *mmap_page);
55
56int ocfs2_read_inline_data(struct inode *inode, struct page *page,
57               struct buffer_head *di_bh);
58int ocfs2_size_fits_inline_data(struct buffer_head *di_bh, u64 new_size);
59
60int ocfs2_get_block(struct inode *inode, sector_t iblock,
61            struct buffer_head *bh_result, int create);
62/* all ocfs2_dio_end_io()'s fault */
63#define ocfs2_iocb_is_rw_locked(iocb) \
64    test_bit(0, (unsigned long *)&iocb->private)
65static inline void ocfs2_iocb_set_rw_locked(struct kiocb *iocb, int level)
66{
67    set_bit(0, (unsigned long *)&iocb->private);
68    if (level)
69        set_bit(1, (unsigned long *)&iocb->private);
70    else
71        clear_bit(1, (unsigned long *)&iocb->private);
72}
73#define ocfs2_iocb_clear_rw_locked(iocb) \
74    clear_bit(0, (unsigned long *)&iocb->private)
75#define ocfs2_iocb_rw_locked_level(iocb) \
76    test_bit(1, (unsigned long *)&iocb->private)
77#endif /* OCFS2_FILE_H */
78

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