1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0-or-later */
2*4882a593Smuzhiyun /* -*- mode: c; c-basic-offset: 8; -*-
3*4882a593Smuzhiyun * vim: noexpandtab sw=8 ts=8 sts=0:
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright (C) 2002, 2004, 2005 Oracle. All rights reserved.
6*4882a593Smuzhiyun */
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun #ifndef OCFS2_AOPS_H
9*4882a593Smuzhiyun #define OCFS2_AOPS_H
10*4882a593Smuzhiyun
11*4882a593Smuzhiyun #include <linux/fs.h>
12*4882a593Smuzhiyun
13*4882a593Smuzhiyun handle_t *ocfs2_start_walk_page_trans(struct inode *inode,
14*4882a593Smuzhiyun struct page *page,
15*4882a593Smuzhiyun unsigned from,
16*4882a593Smuzhiyun unsigned to);
17*4882a593Smuzhiyun
18*4882a593Smuzhiyun int ocfs2_map_page_blocks(struct page *page, u64 *p_blkno,
19*4882a593Smuzhiyun struct inode *inode, unsigned int from,
20*4882a593Smuzhiyun unsigned int to, int new);
21*4882a593Smuzhiyun
22*4882a593Smuzhiyun void ocfs2_unlock_and_free_pages(struct page **pages, int num_pages);
23*4882a593Smuzhiyun
24*4882a593Smuzhiyun int walk_page_buffers( handle_t *handle,
25*4882a593Smuzhiyun struct buffer_head *head,
26*4882a593Smuzhiyun unsigned from,
27*4882a593Smuzhiyun unsigned to,
28*4882a593Smuzhiyun int *partial,
29*4882a593Smuzhiyun int (*fn)( handle_t *handle,
30*4882a593Smuzhiyun struct buffer_head *bh));
31*4882a593Smuzhiyun
32*4882a593Smuzhiyun int ocfs2_write_end_nolock(struct address_space *mapping,
33*4882a593Smuzhiyun loff_t pos, unsigned len, unsigned copied, void *fsdata);
34*4882a593Smuzhiyun
35*4882a593Smuzhiyun typedef enum {
36*4882a593Smuzhiyun OCFS2_WRITE_BUFFER = 0,
37*4882a593Smuzhiyun OCFS2_WRITE_DIRECT,
38*4882a593Smuzhiyun OCFS2_WRITE_MMAP,
39*4882a593Smuzhiyun } ocfs2_write_type_t;
40*4882a593Smuzhiyun
41*4882a593Smuzhiyun int ocfs2_write_begin_nolock(struct address_space *mapping,
42*4882a593Smuzhiyun loff_t pos, unsigned len, ocfs2_write_type_t type,
43*4882a593Smuzhiyun struct page **pagep, void **fsdata,
44*4882a593Smuzhiyun struct buffer_head *di_bh, struct page *mmap_page);
45*4882a593Smuzhiyun
46*4882a593Smuzhiyun int ocfs2_read_inline_data(struct inode *inode, struct page *page,
47*4882a593Smuzhiyun struct buffer_head *di_bh);
48*4882a593Smuzhiyun int ocfs2_size_fits_inline_data(struct buffer_head *di_bh, u64 new_size);
49*4882a593Smuzhiyun
50*4882a593Smuzhiyun int ocfs2_get_block(struct inode *inode, sector_t iblock,
51*4882a593Smuzhiyun struct buffer_head *bh_result, int create);
52*4882a593Smuzhiyun /* all ocfs2_dio_end_io()'s fault */
53*4882a593Smuzhiyun #define ocfs2_iocb_is_rw_locked(iocb) \
54*4882a593Smuzhiyun test_bit(0, (unsigned long *)&iocb->private)
ocfs2_iocb_set_rw_locked(struct kiocb * iocb,int level)55*4882a593Smuzhiyun static inline void ocfs2_iocb_set_rw_locked(struct kiocb *iocb, int level)
56*4882a593Smuzhiyun {
57*4882a593Smuzhiyun set_bit(0, (unsigned long *)&iocb->private);
58*4882a593Smuzhiyun if (level)
59*4882a593Smuzhiyun set_bit(1, (unsigned long *)&iocb->private);
60*4882a593Smuzhiyun else
61*4882a593Smuzhiyun clear_bit(1, (unsigned long *)&iocb->private);
62*4882a593Smuzhiyun }
63*4882a593Smuzhiyun
64*4882a593Smuzhiyun /*
65*4882a593Smuzhiyun * Using a named enum representing lock types in terms of #N bit stored in
66*4882a593Smuzhiyun * iocb->private, which is going to be used for communication between
67*4882a593Smuzhiyun * ocfs2_dio_end_io() and ocfs2_file_write/read_iter().
68*4882a593Smuzhiyun */
69*4882a593Smuzhiyun enum ocfs2_iocb_lock_bits {
70*4882a593Smuzhiyun OCFS2_IOCB_RW_LOCK = 0,
71*4882a593Smuzhiyun OCFS2_IOCB_RW_LOCK_LEVEL,
72*4882a593Smuzhiyun OCFS2_IOCB_NUM_LOCKS
73*4882a593Smuzhiyun };
74*4882a593Smuzhiyun
75*4882a593Smuzhiyun #define ocfs2_iocb_clear_rw_locked(iocb) \
76*4882a593Smuzhiyun clear_bit(OCFS2_IOCB_RW_LOCK, (unsigned long *)&iocb->private)
77*4882a593Smuzhiyun #define ocfs2_iocb_rw_locked_level(iocb) \
78*4882a593Smuzhiyun test_bit(OCFS2_IOCB_RW_LOCK_LEVEL, (unsigned long *)&iocb->private)
79*4882a593Smuzhiyun
80*4882a593Smuzhiyun #endif /* OCFS2_FILE_H */
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