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/**
* libf2fs.c
*
* Copyright (c) 2013 Samsung Electronics Co., Ltd.
* http://www.samsung.com/
*
* Dual licensed under the GPL or LGPL version 2 licenses.
*/
#define _LARGEFILE64_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <fcntl.h>
#include <time.h>
#include <sys/stat.h>
#include <sys/mount.h>
#include <sys/ioctl.h>
#include <f2fs_fs.h>
struct f2fs_configuration config;
/*
* IO interfaces
*/
int dev_read_version(void *buf, __u64 offset, size_t len)
{
if (lseek64(config.kd, (off64_t)offset, SEEK_SET) < 0)
return -1;
if (read(config.kd, buf, len) < 0)
return -1;
return 0;
}
int dev_read(void *buf, __u64 offset, size_t len)
{
if (lseek64(config.fd, (off64_t)offset, SEEK_SET) < 0)
return -1;
if (read(config.fd, buf, len) < 0)
return -1;
return 0;
}
int dev_readahead(__u64 offset, size_t len)
{
#ifdef POSIX_FADV_WILLNEED
return posix_fadvise(config.fd, offset, len, POSIX_FADV_WILLNEED);
#else
return 0;
#endif
}
int dev_write(void *buf, __u64 offset, size_t len)
{
if (lseek64(config.fd, (off64_t)offset, SEEK_SET) < 0)
return -1;
if (write(config.fd, buf, len) < 0)
return -1;
return 0;
}
int dev_write_block(void *buf, __u64 blk_addr)
{
return dev_write(buf, blk_addr * F2FS_BLKSIZE, F2FS_BLKSIZE);
}
int dev_write_dump(void *buf, __u64 offset, size_t len)
{
if (lseek64(config.dump_fd, (off64_t)offset, SEEK_SET) < 0)
return -1;
if (write(config.dump_fd, buf, len) < 0)
return -1;
return 0;
}
int dev_fill(void *buf, __u64 offset, size_t len)
{
/* Only allow fill to zero */
if (*((__u8*)buf))
return -1;
if (lseek64(config.fd, (off64_t)offset, SEEK_SET) < 0)
return -1;
if (write(config.fd, buf, len) < 0)
return -1;
return 0;
}
int dev_read_block(void *buf, __u64 blk_addr)
{
return dev_read(buf, blk_addr * F2FS_BLKSIZE, F2FS_BLKSIZE);
}
int dev_read_blocks(void *buf, __u64 addr, __u32 nr_blks)
{
return dev_read(buf, addr * F2FS_BLKSIZE, nr_blks * F2FS_BLKSIZE);
}
int dev_reada_block(__u64 blk_addr)
{
return dev_readahead(blk_addr * F2FS_BLKSIZE, F2FS_BLKSIZE);
}
void f2fs_finalize_device(struct f2fs_configuration *c)
{
/*
* We should call fsync() to flush out all the dirty pages
* in the block device page cache.
*/
if (fsync(c->fd) < 0)
MSG(0, "\tError: Could not conduct fsync!!!\n");
if (close(c->fd) < 0)
MSG(0, "\tError: Failed to close device file!!!\n");
close(c->kd);
}
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