7606f663da6d1e1181dac172736ed9dfbbb3fd84
[linux-2.6.git] / 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
25 int ocfs2_prepare_write_nolock(struct inode *inode, struct page *page,
26                                unsigned from, unsigned to);
27
28 handle_t *ocfs2_start_walk_page_trans(struct inode *inode,
29                                                          struct page *page,
30                                                          unsigned from,
31                                                          unsigned to);
32
33 int ocfs2_map_page_blocks(struct page *page, u64 *p_blkno,
34                           struct inode *inode, unsigned int from,
35                           unsigned int to, int new);
36
37 void ocfs2_unlock_and_free_pages(struct page **pages, int num_pages);
38
39 int 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
47 int ocfs2_write_end_nolock(struct address_space *mapping,
48                            loff_t pos, unsigned len, unsigned copied,
49                            struct page *page, void *fsdata);
50
51 int ocfs2_write_begin_nolock(struct file *filp,
52                              struct address_space *mapping,
53                              loff_t pos, unsigned len, unsigned flags,
54                              struct page **pagep, void **fsdata,
55                              struct buffer_head *di_bh, struct page *mmap_page);
56
57 int ocfs2_read_inline_data(struct inode *inode, struct page *page,
58                            struct buffer_head *di_bh);
59 int ocfs2_size_fits_inline_data(struct buffer_head *di_bh, u64 new_size);
60
61 int ocfs2_get_block(struct inode *inode, sector_t iblock,
62                     struct buffer_head *bh_result, int create);
63 /* all ocfs2_dio_end_io()'s fault */
64 #define ocfs2_iocb_is_rw_locked(iocb) \
65         test_bit(0, (unsigned long *)&iocb->private)
66 static inline void ocfs2_iocb_set_rw_locked(struct kiocb *iocb, int level)
67 {
68         set_bit(0, (unsigned long *)&iocb->private);
69         if (level)
70                 set_bit(1, (unsigned long *)&iocb->private);
71         else
72                 clear_bit(1, (unsigned long *)&iocb->private);
73 }
74 #define ocfs2_iocb_clear_rw_locked(iocb) \
75         clear_bit(0, (unsigned long *)&iocb->private)
76 #define ocfs2_iocb_rw_locked_level(iocb) \
77         test_bit(1, (unsigned long *)&iocb->private)
78 #endif /* OCFS2_FILE_H */