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/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Copyright (C) 2018-2019 HUAWEI, Inc.
* http://www.huawei.com/
* Created by Li Guifu <bluce.liguifu@huawei.com>
*/
#ifndef __EROFS_IO_H
#define __EROFS_IO_H
#define _GNU_SOURCE
#include <unistd.h>
#include "internal.h"
#ifndef O_BINARY
#define O_BINARY 0
#endif
int dev_open(const char *devname);
int dev_open_ro(const char *dev);
void dev_close(void);
int dev_write(const void *buf, u64 offset, size_t len);
int dev_read(void *buf, u64 offset, size_t len);
int dev_fillzero(u64 offset, size_t len, bool padding);
int dev_fsync(void);
int dev_resize(erofs_blk_t nblocks);
u64 dev_length(void);
extern int erofs_devfd;
int erofs_copy_file_range(int fd_in, erofs_off_t *off_in,
int fd_out, erofs_off_t *off_out,
size_t length);
static inline int blk_write(const void *buf, erofs_blk_t blkaddr,
u32 nblocks)
{
return dev_write(buf, blknr_to_addr(blkaddr),
blknr_to_addr(nblocks));
}
static inline int blk_read(void *buf, erofs_blk_t start,
u32 nblocks)
{
return dev_read(buf, blknr_to_addr(start),
blknr_to_addr(nblocks));
}
#endif
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