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

 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 folio **foliop, 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_init_rw_locked(iocb) \
74	(iocb->private = NULL)
75#define ocfs2_iocb_clear_rw_locked(iocb) \
76	clear_bit(OCFS2_IOCB_RW_LOCK, (unsigned long *)&iocb->private)
77#define ocfs2_iocb_rw_locked_level(iocb) \
78	test_bit(OCFS2_IOCB_RW_LOCK_LEVEL, (unsigned long *)&iocb->private)
79
80#endif /* OCFS2_FILE_H */