blob: eceb456037c11c7a2e68cc2d510908ef781cfdbf [file] [log] [blame]
Mark Fashehccd979b2005-12-15 14:31:24 -08001/* -*- 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
Mark Fasheh1fabe142006-10-09 18:11:45 -070025handle_t *ocfs2_start_walk_page_trans(struct inode *inode,
Mark Fashehccd979b2005-12-15 14:31:24 -080026 struct page *page,
27 unsigned from,
28 unsigned to);
29
Mark Fasheh60b11392007-02-16 11:46:50 -080030int ocfs2_map_page_blocks(struct page *page, u64 *p_blkno,
31 struct inode *inode, unsigned int from,
32 unsigned int to, int new);
33
Mark Fasheh1d410a62007-09-07 14:20:45 -070034void ocfs2_unlock_and_free_pages(struct page **pages, int num_pages);
35
Mark Fasheh60b11392007-02-16 11:46:50 -080036int walk_page_buffers( handle_t *handle,
37 struct buffer_head *head,
38 unsigned from,
39 unsigned to,
40 int *partial,
41 int (*fn)( handle_t *handle,
42 struct buffer_head *bh));
43
Mark Fasheh7307de82007-05-09 15:16:19 -070044int ocfs2_write_end_nolock(struct address_space *mapping,
45 loff_t pos, unsigned len, unsigned copied,
46 struct page *page, void *fsdata);
47
Tao Ma0378da0f2010-08-12 10:25:28 +080048int ocfs2_write_begin_nolock(struct file *filp,
49 struct address_space *mapping,
Mark Fasheh7307de82007-05-09 15:16:19 -070050 loff_t pos, unsigned len, unsigned flags,
51 struct page **pagep, void **fsdata,
52 struct buffer_head *di_bh, struct page *mmap_page);
53
Mark Fasheh1afc32b2007-09-07 14:46:51 -070054int ocfs2_read_inline_data(struct inode *inode, struct page *page,
55 struct buffer_head *di_bh);
56int ocfs2_size_fits_inline_data(struct buffer_head *di_bh, u64 new_size);
57
Tao Ma6f70fa52009-08-25 08:05:12 +080058int ocfs2_get_block(struct inode *inode, sector_t iblock,
59 struct buffer_head *bh_result, int create);
Mark Fashehccd979b2005-12-15 14:31:24 -080060/* all ocfs2_dio_end_io()'s fault */
61#define ocfs2_iocb_is_rw_locked(iocb) \
62 test_bit(0, (unsigned long *)&iocb->private)
Mark Fasheh7cdfc3a2007-04-16 17:28:51 -070063static 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}
Tristan Ye39c99f12010-12-07 14:35:07 +080071
72/*
73 * Using a named enum representing lock types in terms of #N bit stored in
74 * iocb->private, which is going to be used for communication bewteen
75 * ocfs2_dio_end_io() and ocfs2_file_aio_write/read().
76 */
77enum ocfs2_iocb_lock_bits {
78 OCFS2_IOCB_RW_LOCK = 0,
79 OCFS2_IOCB_RW_LOCK_LEVEL,
80 OCFS2_IOCB_SEM,
81 OCFS2_IOCB_NUM_LOCKS
82};
83
Mark Fashehccd979b2005-12-15 14:31:24 -080084#define ocfs2_iocb_clear_rw_locked(iocb) \
Tristan Ye39c99f12010-12-07 14:35:07 +080085 clear_bit(OCFS2_IOCB_RW_LOCK, (unsigned long *)&iocb->private)
Mark Fasheh7cdfc3a2007-04-16 17:28:51 -070086#define ocfs2_iocb_rw_locked_level(iocb) \
Tristan Ye39c99f12010-12-07 14:35:07 +080087 test_bit(OCFS2_IOCB_RW_LOCK_LEVEL, (unsigned long *)&iocb->private)
88#define ocfs2_iocb_set_sem_locked(iocb) \
89 set_bit(OCFS2_IOCB_SEM, (unsigned long *)&iocb->private)
90#define ocfs2_iocb_clear_sem_locked(iocb) \
91 clear_bit(OCFS2_IOCB_SEM, (unsigned long *)&iocb->private)
92#define ocfs2_iocb_is_sem_locked(iocb) \
93 test_bit(OCFS2_IOCB_SEM, (unsigned long *)&iocb->private)
Mark Fashehccd979b2005-12-15 14:31:24 -080094#endif /* OCFS2_FILE_H */