xref: /openbmc/linux/fs/ocfs2/aops.h (revision 22246614)
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 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 
56 int ocfs2_read_inline_data(struct inode *inode, struct page *page,
57 			   struct buffer_head *di_bh);
58 int ocfs2_size_fits_inline_data(struct buffer_head *di_bh, u64 new_size);
59 
60 /* all ocfs2_dio_end_io()'s fault */
61 #define ocfs2_iocb_is_rw_locked(iocb) \
62 	test_bit(0, (unsigned long *)&iocb->private)
63 static inline void ocfs2_iocb_set_rw_locked(struct kiocb *iocb, int level)
64 {
65 	set_bit(0, (unsigned long *)&iocb->private);
66 	if (level)
67 		set_bit(1, (unsigned long *)&iocb->private);
68 	else
69 		clear_bit(1, (unsigned long *)&iocb->private);
70 }
71 #define ocfs2_iocb_clear_rw_locked(iocb) \
72 	clear_bit(0, (unsigned long *)&iocb->private)
73 #define ocfs2_iocb_rw_locked_level(iocb) \
74 	test_bit(1, (unsigned long *)&iocb->private)
75 #endif /* OCFS2_FILE_H */
76