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
11 handle_t *ocfs2_start_walk_page_trans(struct inode *inode,
12 struct page *page,
13 unsigned from,
14 unsigned to);
15
16 int ocfs2_map_page_blocks(struct page *page, u64 *p_blkno,
17 struct inode *inode, unsigned int from,
18 unsigned int to, int new);
19
20 void ocfs2_unlock_and_free_pages(struct page **pages, int num_pages);
21
22 int 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
30 int ocfs2_write_end_nolock(struct address_space *mapping,
31 loff_t pos, unsigned len, unsigned copied, void *fsdata);
32
33 typedef enum {
34 OCFS2_WRITE_BUFFER = 0,
35 OCFS2_WRITE_DIRECT,
36 OCFS2_WRITE_MMAP,
37 } ocfs2_write_type_t;
38
39 int 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
44 int ocfs2_read_inline_data(struct inode *inode, struct page *page,
45 struct buffer_head *di_bh);
46 int ocfs2_size_fits_inline_data(struct buffer_head *di_bh, u64 new_size);
47
48 int 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)
ocfs2_iocb_set_rw_locked(struct kiocb * iocb,int level)53 static 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 */
67 enum 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 */
79