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) |
53 | static inline void ocfs2_iocb_set_rw_locked(struct kiocb *iocb, int level) |
54 | { |
55 | set_bit(nr: 0, addr: (unsigned long *)&iocb->private); |
56 | if (level) |
57 | set_bit(nr: 1, addr: (unsigned long *)&iocb->private); |
58 | else |
59 | clear_bit(nr: 1, addr: (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 | |