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Linux kernel mirror (for testing)
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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
11int ocfs2_map_folio_blocks(struct folio *folio, u64 *p_blkno,
12 struct inode *inode, unsigned int from,
13 unsigned int to, int new);
14
15void ocfs2_unlock_and_free_folios(struct folio **folios, int num_folios);
16
17int walk_page_buffers( handle_t *handle,
18 struct buffer_head *head,
19 unsigned from,
20 unsigned to,
21 int *partial,
22 int (*fn)( handle_t *handle,
23 struct buffer_head *bh));
24
25int ocfs2_write_end_nolock(struct address_space *mapping,
26 loff_t pos, unsigned len, unsigned copied, void *fsdata);
27
28typedef enum {
29 OCFS2_WRITE_BUFFER = 0,
30 OCFS2_WRITE_DIRECT,
31 OCFS2_WRITE_MMAP,
32} ocfs2_write_type_t;
33
34int ocfs2_write_begin_nolock(struct address_space *mapping,
35 loff_t pos, unsigned len, ocfs2_write_type_t type,
36 struct folio **foliop, void **fsdata,
37 struct buffer_head *di_bh, struct folio *mmap_folio);
38
39int ocfs2_read_inline_data(struct inode *inode, struct folio *folio,
40 struct buffer_head *di_bh);
41int ocfs2_size_fits_inline_data(struct buffer_head *di_bh, u64 new_size);
42
43int ocfs2_get_block(struct inode *inode, sector_t iblock,
44 struct buffer_head *bh_result, int create);
45/* all ocfs2_dio_end_io()'s fault */
46#define ocfs2_iocb_is_rw_locked(iocb) \
47 test_bit(0, (unsigned long *)&iocb->private)
48static inline void ocfs2_iocb_set_rw_locked(struct kiocb *iocb, int level)
49{
50 set_bit(0, (unsigned long *)&iocb->private);
51 if (level)
52 set_bit(1, (unsigned long *)&iocb->private);
53 else
54 clear_bit(1, (unsigned long *)&iocb->private);
55}
56
57/*
58 * Using a named enum representing lock types in terms of #N bit stored in
59 * iocb->private, which is going to be used for communication between
60 * ocfs2_dio_end_io() and ocfs2_file_write/read_iter().
61 */
62enum ocfs2_iocb_lock_bits {
63 OCFS2_IOCB_RW_LOCK = 0,
64 OCFS2_IOCB_RW_LOCK_LEVEL,
65 OCFS2_IOCB_NUM_LOCKS
66};
67
68#define ocfs2_iocb_init_rw_locked(iocb) \
69 (iocb->private = NULL)
70#define ocfs2_iocb_clear_rw_locked(iocb) \
71 clear_bit(OCFS2_IOCB_RW_LOCK, (unsigned long *)&iocb->private)
72#define ocfs2_iocb_rw_locked_level(iocb) \
73 test_bit(OCFS2_IOCB_RW_LOCK_LEVEL, (unsigned long *)&iocb->private)
74
75#endif /* OCFS2_FILE_H */