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1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 * Copyright (C) 2002, 2004, 2005 Oracle. All rights reserved.
4 */
5
6#ifndef OCFS2_AOPS_H
7#define OCFS2_AOPS_H
8
9#include <linux/fs.h>
10
11handle_t *ocfs2_start_walk_page_trans(struct inode *inode,
12 struct page *page,
13 unsigned from,
14 unsigned to);
15
16int ocfs2_map_page_blocks(struct page *page, u64 *p_blkno,
17 struct inode *inode, unsigned int from,
18 unsigned int to, int new);
19
20void ocfs2_unlock_and_free_pages(struct page **pages, int num_pages);
21
22int walk_page_buffers( handle_t *handle,
23 struct buffer_head *head,
24 unsigned from,
25 unsigned to,
26 int *partial,
27 int (*fn)( handle_t *handle,
28 struct buffer_head *bh));
29
30int ocfs2_write_end_nolock(struct address_space *mapping,
31 loff_t pos, unsigned len, unsigned copied, void *fsdata);
32
33typedef enum {
34 OCFS2_WRITE_BUFFER = 0,
35 OCFS2_WRITE_DIRECT,
36 OCFS2_WRITE_MMAP,
37} ocfs2_write_type_t;
38
39int ocfs2_write_begin_nolock(struct address_space *mapping,
40 loff_t pos, unsigned len, ocfs2_write_type_t type,
41 struct page **pagep, void **fsdata,
42 struct buffer_head *di_bh, struct page *mmap_page);
43
44int ocfs2_read_inline_data(struct inode *inode, struct page *page,
45 struct buffer_head *di_bh);
46int ocfs2_size_fits_inline_data(struct buffer_head *di_bh, u64 new_size);
47
48int ocfs2_get_block(struct inode *inode, sector_t iblock,
49 struct buffer_head *bh_result, int create);
50/* all ocfs2_dio_end_io()'s fault */
51#define ocfs2_iocb_is_rw_locked(iocb) \
52 test_bit(0, (unsigned long *)&iocb->private)
53static inline void ocfs2_iocb_set_rw_locked(struct kiocb *iocb, int level)
54{
55 set_bit(0, (unsigned long *)&iocb->private);
56 if (level)
57 set_bit(1, (unsigned long *)&iocb->private);
58 else
59 clear_bit(1, (unsigned long *)&iocb->private);
60}
61
62/*
63 * Using a named enum representing lock types in terms of #N bit stored in
64 * iocb->private, which is going to be used for communication between
65 * ocfs2_dio_end_io() and ocfs2_file_write/read_iter().
66 */
67enum ocfs2_iocb_lock_bits {
68 OCFS2_IOCB_RW_LOCK = 0,
69 OCFS2_IOCB_RW_LOCK_LEVEL,
70 OCFS2_IOCB_NUM_LOCKS
71};
72
73#define ocfs2_iocb_clear_rw_locked(iocb) \
74 clear_bit(OCFS2_IOCB_RW_LOCK, (unsigned long *)&iocb->private)
75#define ocfs2_iocb_rw_locked_level(iocb) \
76 test_bit(OCFS2_IOCB_RW_LOCK_LEVEL, (unsigned long *)&iocb->private)
77
78#endif /* OCFS2_FILE_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#include <linux/aio.h>
26
27handle_t *ocfs2_start_walk_page_trans(struct inode *inode,
28 struct page *page,
29 unsigned from,
30 unsigned to);
31
32int ocfs2_map_page_blocks(struct page *page, u64 *p_blkno,
33 struct inode *inode, unsigned int from,
34 unsigned int to, int new);
35
36void ocfs2_unlock_and_free_pages(struct page **pages, int num_pages);
37
38int 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
46int ocfs2_write_end_nolock(struct address_space *mapping,
47 loff_t pos, unsigned len, unsigned copied,
48 struct page *page, void *fsdata);
49
50int ocfs2_write_begin_nolock(struct file *filp,
51 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
74/*
75 * Using a named enum representing lock types in terms of #N bit stored in
76 * iocb->private, which is going to be used for communication between
77 * 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,
83 OCFS2_IOCB_UNALIGNED_IO,
84 OCFS2_IOCB_NUM_LOCKS
85};
86
87#define ocfs2_iocb_clear_rw_locked(iocb) \
88 clear_bit(OCFS2_IOCB_RW_LOCK, (unsigned long *)&iocb->private)
89#define ocfs2_iocb_rw_locked_level(iocb) \
90 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)
97
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#endif /* OCFS2_FILE_H */