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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
Kent Overstreeta27bb332013-05-07 16:19:08 -070025#include <linux/aio.h>
26
Mark Fasheh1fabe142006-10-09 18:11:45 -070027handle_t *ocfs2_start_walk_page_trans(struct inode *inode,
Mark Fashehccd979b2005-12-15 14:31:24 -080028 struct page *page,
29 unsigned from,
30 unsigned to);
31
Mark Fasheh60b11392007-02-16 11:46:50 -080032int ocfs2_map_page_blocks(struct page *page, u64 *p_blkno,
33 struct inode *inode, unsigned int from,
34 unsigned int to, int new);
35
Mark Fasheh1d410a62007-09-07 14:20:45 -070036void ocfs2_unlock_and_free_pages(struct page **pages, int num_pages);
37
Mark Fasheh60b11392007-02-16 11:46:50 -080038int walk_page_buffers( handle_t *handle,
39 struct buffer_head *head,
40 unsigned from,
41 unsigned to,
42 int *partial,
43 int (*fn)( handle_t *handle,
44 struct buffer_head *bh));
45
Mark Fasheh7307de82007-05-09 15:16:19 -070046int ocfs2_write_end_nolock(struct address_space *mapping,
47 loff_t pos, unsigned len, unsigned copied,
48 struct page *page, void *fsdata);
49
Tao Ma0378da0f2010-08-12 10:25:28 +080050int ocfs2_write_begin_nolock(struct file *filp,
51 struct address_space *mapping,
Mark Fasheh7307de82007-05-09 15:16:19 -070052 loff_t pos, unsigned len, unsigned flags,
53 struct page **pagep, void **fsdata,
54 struct buffer_head *di_bh, struct page *mmap_page);
55
Mark Fasheh1afc32b2007-09-07 14:46:51 -070056int 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
Tao Ma6f70fa52009-08-25 08:05:12 +080060int ocfs2_get_block(struct inode *inode, sector_t iblock,
61 struct buffer_head *bh_result, int create);
Mark Fashehccd979b2005-12-15 14:31:24 -080062/* all ocfs2_dio_end_io()'s fault */
63#define ocfs2_iocb_is_rw_locked(iocb) \
64 test_bit(0, (unsigned long *)&iocb->private)
Mark Fasheh7cdfc3a2007-04-16 17:28:51 -070065static 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}
Tristan Ye39c99f12010-12-07 14:35:07 +080073
74/*
75 * Using a named enum representing lock types in terms of #N bit stored in
Lucas De Marchi25985ed2011-03-30 22:57:33 -030076 * iocb->private, which is going to be used for communication between
Tristan Ye39c99f12010-12-07 14:35:07 +080077 * ocfs2_dio_end_io() and ocfs2_file_aio_write/read().
78 */
79enum ocfs2_iocb_lock_bits {
80 OCFS2_IOCB_RW_LOCK = 0,
81 OCFS2_IOCB_RW_LOCK_LEVEL,
82 OCFS2_IOCB_SEM,
Mark Fasheha11f7e62011-06-22 14:23:38 -070083 OCFS2_IOCB_UNALIGNED_IO,
Tristan Ye39c99f12010-12-07 14:35:07 +080084 OCFS2_IOCB_NUM_LOCKS
85};
86
Mark Fashehccd979b2005-12-15 14:31:24 -080087#define ocfs2_iocb_clear_rw_locked(iocb) \
Tristan Ye39c99f12010-12-07 14:35:07 +080088 clear_bit(OCFS2_IOCB_RW_LOCK, (unsigned long *)&iocb->private)
Mark Fasheh7cdfc3a2007-04-16 17:28:51 -070089#define ocfs2_iocb_rw_locked_level(iocb) \
Tristan Ye39c99f12010-12-07 14:35:07 +080090 test_bit(OCFS2_IOCB_RW_LOCK_LEVEL, (unsigned long *)&iocb->private)
91#define ocfs2_iocb_set_sem_locked(iocb) \
92 set_bit(OCFS2_IOCB_SEM, (unsigned long *)&iocb->private)
93#define ocfs2_iocb_clear_sem_locked(iocb) \
94 clear_bit(OCFS2_IOCB_SEM, (unsigned long *)&iocb->private)
95#define ocfs2_iocb_is_sem_locked(iocb) \
96 test_bit(OCFS2_IOCB_SEM, (unsigned long *)&iocb->private)
Mark Fasheha11f7e62011-06-22 14:23:38 -070097
98#define ocfs2_iocb_set_unaligned_aio(iocb) \
99 set_bit(OCFS2_IOCB_UNALIGNED_IO, (unsigned long *)&iocb->private)
100#define ocfs2_iocb_clear_unaligned_aio(iocb) \
101 clear_bit(OCFS2_IOCB_UNALIGNED_IO, (unsigned long *)&iocb->private)
102#define ocfs2_iocb_is_unaligned_aio(iocb) \
103 test_bit(OCFS2_IOCB_UNALIGNED_IO, (unsigned long *)&iocb->private)
104
105#define OCFS2_IOEND_WQ_HASH_SZ 37
106#define ocfs2_ioend_wq(v) (&ocfs2__ioend_wq[((unsigned long)(v)) %\
107 OCFS2_IOEND_WQ_HASH_SZ])
108extern wait_queue_head_t ocfs2__ioend_wq[OCFS2_IOEND_WQ_HASH_SZ];
109
Mark Fashehccd979b2005-12-15 14:31:24 -0800110#endif /* OCFS2_FILE_H */