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https://github.com/AsahiLinux/u-boot
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5994e8b643
The ext4, reiserfs and zfs filesystems all have their own implementation of the same function, *_devread. Generalize this function into fs_devread and put the code into fs/fs_internal.c. Signed-off-by: Marek Behun <marek.behun@nic.cz> [trini: Move fs/fs_internal.o hunk to the end of fs/Makefile as all cases need it] Signed-off-by: Tom Rini <trini@konsulko.com>
65 lines
1.6 KiB
C
65 lines
1.6 KiB
C
/*
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* (C) Copyright 2011 - 2012 Samsung Electronics
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* EXT4 filesystem implementation in Uboot by
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* Uma Shankar <uma.shankar@samsung.com>
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* Manjunatha C Achar <a.manjunatha@samsung.com>
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*
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* made from existing ext2/dev.c file of Uboot
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* (C) Copyright 2004
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* esd gmbh <www.esd-electronics.com>
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* Reinhard Arlt <reinhard.arlt@esd-electronics.com>
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*
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* based on code of fs/reiserfs/dev.c by
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*
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* (C) Copyright 2003 - 2004
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* Sysgo AG, <www.elinos.com>, Pavel Bartusek <pba@sysgo.com>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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/*
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* Changelog:
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* 0.1 - Newly created file for ext4fs support. Taken from
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* fs/ext2/dev.c file in uboot.
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*/
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#include <common.h>
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#include <blk.h>
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#include <config.h>
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#include <fs_internal.h>
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#include <ext4fs.h>
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#include <ext_common.h>
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#include "ext4_common.h"
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lbaint_t part_offset;
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static struct blk_desc *ext4fs_blk_desc;
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static disk_partition_t *part_info;
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void ext4fs_set_blk_dev(struct blk_desc *rbdd, disk_partition_t *info)
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{
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assert(rbdd->blksz == (1 << rbdd->log2blksz));
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ext4fs_blk_desc = rbdd;
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get_fs()->dev_desc = rbdd;
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part_info = info;
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part_offset = info->start;
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get_fs()->total_sect = ((uint64_t)info->size * info->blksz) >>
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get_fs()->dev_desc->log2blksz;
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}
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int ext4fs_devread(lbaint_t sector, int byte_offset, int byte_len,
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char *buffer)
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{
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return fs_devread(get_fs()->dev_desc, part_info, sector, byte_offset,
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byte_len, buffer);
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}
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int ext4_read_superblock(char *buffer)
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{
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struct ext_filesystem *fs = get_fs();
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int sect = SUPERBLOCK_START >> fs->dev_desc->log2blksz;
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int off = SUPERBLOCK_START % fs->dev_desc->blksz;
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return ext4fs_devread(sect, off, SUPERBLOCK_SIZE,
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buffer);
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}
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