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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Copyright (C) 2002, 2004, 2005 Oracle. All rights reserved.
*/
#ifndef OCFS2_AOPS_H
#define OCFS2_AOPS_H
#include <linux/fs.h>
handle_t *ocfs2_start_walk_page_trans(struct inode *inode,
struct page *page,
unsigned from,
unsigned to);
int ocfs2_map_page_blocks(struct page *page, u64 *p_blkno,
struct inode *inode, unsigned int from,
unsigned int to, int new);
void ocfs2_unlock_and_free_pages(struct page **pages, int num_pages);
int walk_page_buffers( handle_t *handle,
struct buffer_head *head,
unsigned from,
unsigned to,
int *partial,
int (*fn)( handle_t *handle,
struct buffer_head *bh));
int ocfs2_write_end_nolock(struct address_space *mapping,
loff_t pos, unsigned len, unsigned copied, void *fsdata);
typedef enum {
OCFS2_WRITE_BUFFER = 0,
OCFS2_WRITE_DIRECT,
OCFS2_WRITE_MMAP,
} ocfs2_write_type_t;
int ocfs2_write_begin_nolock(struct address_space *mapping,
loff_t pos, unsigned len, ocfs2_write_type_t type,
struct page **pagep, void **fsdata,
struct buffer_head *di_bh, struct page *mmap_page);
int ocfs2_read_inline_data(struct inode *inode, struct page *page,
struct buffer_head *di_bh);
int ocfs2_size_fits_inline_data(struct buffer_head *di_bh, u64 new_size);
int ocfs2_get_block(struct inode *inode, sector_t iblock,
struct buffer_head *bh_result, int create);
/* all ocfs2_dio_end_io()'s fault */
#define ocfs2_iocb_is_rw_locked(iocb) \
test_bit(0, (unsigned long *)&iocb->private)
static inline void ocfs2_iocb_set_rw_locked(struct kiocb *iocb, int level)
{
set_bit(0, (unsigned long *)&iocb->private);
if (level)
set_bit(1, (unsigned long *)&iocb->private);
else
clear_bit(1, (unsigned long *)&iocb->private);
}
/*
* Using a named enum representing lock types in terms of #N bit stored in
* iocb->private, which is going to be used for communication between
* ocfs2_dio_end_io() and ocfs2_file_write/read_iter().
*/
enum ocfs2_iocb_lock_bits {
OCFS2_IOCB_RW_LOCK = 0,
OCFS2_IOCB_RW_LOCK_LEVEL,
OCFS2_IOCB_NUM_LOCKS
};
#define ocfs2_iocb_init_rw_locked(iocb) \
(iocb->private = NULL)
#define ocfs2_iocb_clear_rw_locked(iocb) \
clear_bit(OCFS2_IOCB_RW_LOCK, (unsigned long *)&iocb->private)
#define ocfs2_iocb_rw_locked_level(iocb) \
test_bit(OCFS2_IOCB_RW_LOCK_LEVEL, (unsigned long *)&iocb->private)
#endif /* OCFS2_FILE_H */
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