81 lines
2.4 KiB
C
81 lines
2.4 KiB
C
|
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
||
|
|
/* -*- mode: c; c-basic-offset: 8; -*-
|
||
|
|
* vim: noexpandtab sw=8 ts=8 sts=0:
|
||
|
|
*
|
||
|
|
* 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_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 */
|