dev.c
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/*
* (C) Copyright 2011 - 2012 Samsung Electronics
* EXT4 filesystem implementation in Uboot by
* Uma Shankar <uma.shankar@samsung.com>
* Manjunatha C Achar <a.manjunatha@samsung.com>
*
* made from existing ext2/dev.c file of Uboot
* (C) Copyright 2004
* esd gmbh <www.esd-electronics.com>
* Reinhard Arlt <reinhard.arlt@esd-electronics.com>
*
* based on code of fs/reiserfs/dev.c by
*
* (C) Copyright 2003 - 2004
* Sysgo AG, <www.elinos.com>, Pavel Bartusek <pba@sysgo.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
/*
* Changelog:
* 0.1 - Newly created file for ext4fs support. Taken from
* fs/ext2/dev.c file in uboot.
*/
#include <common.h>
#include <blk.h>
#include <config.h>
#include <fs_internal.h>
#include <ext4fs.h>
#include <ext_common.h>
#include "ext4_common.h"
lbaint_t part_offset;
static struct blk_desc *ext4fs_blk_desc;
static disk_partition_t *part_info;
void ext4fs_set_blk_dev(struct blk_desc *rbdd, disk_partition_t *info)
{
assert(rbdd->blksz == (1 << rbdd->log2blksz));
ext4fs_blk_desc = rbdd;
get_fs()->dev_desc = rbdd;
part_info = info;
part_offset = info->start;
get_fs()->total_sect = ((uint64_t)info->size * info->blksz) >>
get_fs()->dev_desc->log2blksz;
}
int ext4fs_devread(lbaint_t sector, int byte_offset, int byte_len,
char *buffer)
{
return fs_devread(get_fs()->dev_desc, part_info, sector, byte_offset,
byte_len, buffer);
}
int ext4_read_superblock(char *buffer)
{
struct ext_filesystem *fs = get_fs();
int sect = SUPERBLOCK_START >> fs->dev_desc->log2blksz;
int off = SUPERBLOCK_START % fs->dev_desc->blksz;
return ext4fs_devread(sect, off, SUPERBLOCK_SIZE,
buffer);
}